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The work of the last week

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This commit is contained in:
j1nx 2024-08-05 09:07:16 +00:00
parent 569fa2859f
commit 2181fc8575
257 changed files with 537 additions and 24916 deletions
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2
buildroot

@ -1 +1 @@
Subproject commit c82edb58b41b15627ef7262118477122b3e99c34
Subproject commit afbbc1095dc4c698774686cd17f03a20a0cf63c2

1
buildroot-external/Config.in
View File

@ -116,6 +116,7 @@ endmenu
source "$BR2_EXTERNAL_OPENVOICEOS_PATH/package/respeaker/Config.in"
source "$BR2_EXTERNAL_OPENVOICEOS_PATH/package/rnnnoise-ladspa/Config.in"
source "$BR2_EXTERNAL_OPENVOICEOS_PATH/package/roc-toolkit/Config.in"
source "$BR2_EXTERNAL_OPENVOICEOS_PATH/package/rpi-bluetooth/Config.in"
source "$BR2_EXTERNAL_OPENVOICEOS_PATH/package/rpi-eeprom/Config.in"
source "$BR2_EXTERNAL_OPENVOICEOS_PATH/package/ruy/Config.in"
source "$BR2_EXTERNAL_OPENVOICEOS_PATH/package/snapcast/Config.in"

2
buildroot-external/board/ovos/raspberrypi/cmdline.txt
View File

@ -1 +1 @@
numa=fake=4 numa_policy=interleave mitigations=off 8250.nr_uarts=1 snd_bcm2835.enable_headphones=1 snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_compat_alsa=0 dwc_otg.lpm_enable=0 acpi=off cgroup_enable=memory psi=1 usb-storage.quirks=174c:55aa:u,2109:0715:u,152d:0578:u,152d:0579:u,152d:1561:u,174c:0829:u,14b0:0206:u
numa=fake=4 numa_policy=interleave mitigations=off 8250.nr_uarts=1 snd_bcm2835.enable_headphones=1 snd_bcm2835.enable_hdmi=1 dwc_otg.lpm_enable=0 acpi=off cgroup_enable=memory psi=1 usb-storage.quirks=174c:55aa:u,2109:0715:u,152d:0578:u,152d:0579:u,152d:1561:u,174c:0829:u,14b0:0206:u

2
buildroot-external/board/ovos/raspberrypi/grub-efi.cfg
View File

@ -11,7 +11,7 @@ set menu_color_highlight=white/red
load_env
default_cmdline="systemd.machine_id=$MACHINE_ID fsck.repair=yes zram.enabled=1 zram.num_devices=3 console=console consoleblank=0 loglevel=0 vt.global_cursor_default=0 logo.nologo systemd.show_status=0 systemd.unified_cgroup_hierarchy=1 cgroup_enable=cpuset cgroup_memory=1 $boot_condition rootwait quiet"
default_cmdline="systemd.machine_id=$MACHINE_ID fsck.repair=yes zram.enabled=1 zram.num_devices=3 console=console consoleblank=0 loglevel=0 vt.global_cursor_default=0 logo.nologo systemd.show_status=0 systemd.unified_cgroup_hierarchy=1 cgroup_enable=cpuset cgroup_memory=1 $boot_condition rootwait quiet toram"
file_env -f ($root)/cmdline.txt cmdline
regexp --set 1:boothd (.+),.+ ${root}

18
buildroot-external/board/ovos/raspberrypi/kernel.config
View File

@ -1,5 +1,3 @@
CONFIG_ACPI=ACPI
CONFIG_EFI=y
CONFIG_EFI_STUB=y
@ -18,26 +16,10 @@ CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_VFAT_FS=m
CONFIG_EFIVAR_FS=m
CONFIG_VIRTIO=y
CONFIG_VIRTIO_PCI=y
CONFIG_VIRTIO_NET=y
CONFIG_VIRTIO_BALLOON=m
CONFIG_VIRTIO_INPUT=m
CONFIG_VIRTIO_BLK=y
CONFIG_VIRTIO_CONSOLE=m
CONFIG_VIRTIO_VSOCKETS=m
CONFIG_VIRTIO_MMIO=y
CONFIG_SCSI_VIRTIO=y
CONFIG_HW_RANDOM_VIRTIO=y
CONFIG_NVME_CORE=y
CONFIG_BLK_DEV_NVME=y
CONFIG_NVME_HWMON=y
CONFIG_DRM_VIRTIO_GPU=m
CONFIG_HYPERVISOR_GUEST=HYPERVISOR_GUEST
# Disabling devices that are non commonly used for smart speaker/devices
# CONFIG_CDROM is not set
# CONFIG_VIDEO_IRS1125 is not set

BIN
buildroot-external/board/ovos/raspberrypi/rpi4/RPI_EFI.fd
View File

Binary file not shown.

4
buildroot-external/busybox.config
View File

@ -8,7 +8,7 @@ CONFIG_HAVE_DOT_CONFIG=y
#
# Settings
#
# CONFIG_DESKTOP is not set
CONFIG_DESKTOP=y
# CONFIG_EXTRA_COMPAT is not set
# CONFIG_FEDORA_COMPAT is not set
# CONFIG_INCLUDE_SUSv2 is not set
@ -53,7 +53,7 @@ CONFIG_EXTRA_CFLAGS=""
CONFIG_EXTRA_LDFLAGS=""
CONFIG_EXTRA_LDLIBS=""
# CONFIG_USE_PORTABLE_CODE is not set
# CONFIG_STACK_OPTIMIZATION_386 is not set
CONFIG_STACK_OPTIMIZATION_386=y
CONFIG_STATIC_LIBGCC=y
#

53
buildroot-external/configs/rpi4_64_defconfig
View File

@ -15,13 +15,14 @@ BR2_TARGET_GENERIC_HOSTNAME="OpenVoiceOS"
BR2_TARGET_GENERIC_ISSUE="Welcome to OpenVoiceOS"
BR2_TARGET_GENERIC_PASSWD_SHA512=y
BR2_INIT_SYSTEMD=y
BR2_INIT_SYSTEMD_VAR_NONE=y
BR2_ROOTFS_DEVICE_TABLE_SUPPORTS_EXTENDED_ATTRIBUTES=y
# BR2_TARGET_ENABLE_ROOT_LOGIN is not set
BR2_SYSTEM_BIN_SH_BASH=y
# BR2_TARGET_GENERIC_GETTY is not set
# BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW is not set
BR2_SYSTEM_DHCP="eth0"
# BR2_ENABLE_LOCALE_PURGE is not set
BR2_GENERATE_LOCALE="en_US.UTF-8"
BR2_GENERATE_LOCALE=" C en_US"
BR2_SYSTEM_ENABLE_NLS=y
BR2_ROOTFS_USERS_TABLES="$(BR2_EXTERNAL)/user_table.txt"
BR2_ROOTFS_OVERLAY="$(BR2_EXTERNAL)/rootfs-overlay $(BR2_EXTERNAL)/board/ovos/raspberrypi/rootfs-overlay $(BR2_EXTERNAL)/board/ovos/raspberrypi/rpi4/rootfs-overlay"
@ -30,7 +31,7 @@ BR2_ROOTFS_POST_IMAGE_SCRIPT="$(BR2_EXTERNAL)/scripts/post-image.sh"
BR2_ROOTFS_POST_SCRIPT_ARGS="$(BR2_EXTERNAL)/board/ovos/raspberrypi/rpi4"
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,d24229dcef58e0162780ceffa02eb5f6a01b9a4d)/linux-d24229dcef58e0162780ceffa02eb5f6a01b9a4d.tar.gz"
BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,16d0ee22d2c0b32cc67db73ce03263b740bba2a7)/linux-16d0ee22d2c0b32cc67db73ce03263b740bba2a7.tar.gz"
BR2_LINUX_KERNEL_DEFCONFIG="bcm2711"
BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="$(BR2_EXTERNAL)/kernel/ovos.config $(BR2_EXTERNAL)/kernel/device-drivers.config $(BR2_EXTERNAL)/kernel/docker.config $(BR2_EXTERNAL)/board/ovos/raspberrypi/kernel.config"
BR2_LINUX_KERNEL_LZ4=y
@ -58,6 +59,10 @@ BR2_PACKAGE_ALSA_UTILS_ASEQNET=y
BR2_PACKAGE_ALSA_UTILS_BAT=y
BR2_PACKAGE_ALSA_UTILS_IECSET=y
BR2_PACKAGE_ALSA_UTILS_SPEAKER_TEST=y
BR2_PACKAGE_FFMPEG=y
BR2_PACKAGE_FFMPEG_GPL=y
BR2_PACKAGE_FFMPEG_NONFREE=y
BR2_PACKAGE_FFMPEG_AVRESAMPLE=y
# BR2_PACKAGE_GSTREAMER1_PARSE is not set
# BR2_PACKAGE_GSTREAMER1_TRACE is not set
# BR2_PACKAGE_GSTREAMER1_GST_DEBUG is not set
@ -88,6 +93,7 @@ BR2_PACKAGE_GREP=y
BR2_PACKAGE_JO=y
BR2_PACKAGE_JQ=y
BR2_PACKAGE_PATCH=y
BR2_PACKAGE_PKGCONF=y
BR2_PACKAGE_CPIO=y
BR2_PACKAGE_DOSFSTOOLS=y
BR2_PACKAGE_DOSFSTOOLS_FATLABEL=y
@ -95,13 +101,11 @@ BR2_PACKAGE_DOSFSTOOLS_FSCK_FAT=y
BR2_PACKAGE_DOSFSTOOLS_MKFS_FAT=y
BR2_PACKAGE_E2FSPROGS=y
BR2_PACKAGE_E2FSPROGS_FUSE2FS=y
BR2_PACKAGE_E2FSPROGS_RESIZE2FS=y
BR2_PACKAGE_EROFS_UTILS=y
BR2_PACKAGE_EROFS_UTILS_LZ4=y
BR2_PACKAGE_EROFS_UTILS_LZMA=y
BR2_PACKAGE_EROFS_UTILS_EROFSFUSE=y
BR2_PACKAGE_FUSE_OVERLAYFS=y
BR2_PACKAGE_NFS_UTILS=y
BR2_PACKAGE_NTFS_3G=y
BR2_PACKAGE_MESA3D=y
BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_V3D=y
@ -121,20 +125,22 @@ BR2_PACKAGE_GPTFDISK=y
BR2_PACKAGE_GPTFDISK_GDISK=y
BR2_PACKAGE_GPTFDISK_SGDISK=y
BR2_PACKAGE_I2C_TOOLS=y
BR2_PACKAGE_KBD=y
BR2_PACKAGE_PARTED=y
BR2_PACKAGE_RNG_TOOLS=y
BR2_PACKAGE_SPI_TOOLS=y
BR2_PACKAGE_USB_MODESWITCH_DATA=y
BR2_PACKAGE_JIMTCL=y
BR2_PACKAGE_LUAJIT=y
BR2_PACKAGE_PYTHON3=y
BR2_PACKAGE_PYTHON3_PY_PYC=y
BR2_PACKAGE_PYTHON_GOBJECT=y
# BR2_PACKAGE_PYTHON3_UNICODEDATA is not set
BR2_PACKAGE_PYTHON_PIP=y
BR2_PACKAGE_PYTHON_PODMAN_COMPOSE=y
BR2_PACKAGE_PYTHON_SPIDEV=y
BR2_PACKAGE_ALSA_LIB_PYTHON=y
BR2_PACKAGE_ALSA_PLUGINS=y
BR2_PACKAGE_LIBSAMPLERATE=y
BR2_PACKAGE_LV2=y
BR2_PACKAGE_LIBSOXR=y
BR2_PACKAGE_LILV=y
BR2_PACKAGE_OPUS=y
BR2_PACKAGE_PORTAUDIO=y
BR2_PACKAGE_SPEEXDSP=y
BR2_PACKAGE_WEBRTC_AUDIO_PROCESSING=y
@ -146,6 +152,7 @@ BR2_PACKAGE_LIBKSBA=y
BR2_PACKAGE_LIBSSH2=y
BR2_PACKAGE_LIBOPENSSL_BIN=y
BR2_PACKAGE_LIBOPENSSL_ENGINES=y
BR2_PACKAGE_SQLITE=y
BR2_PACKAGE_LIBCONFIG=y
BR2_PACKAGE_LIBLOCKFILE=y
BR2_PACKAGE_LIBNFS=y
@ -153,6 +160,8 @@ BR2_PACKAGE_LIBSYSFS=y
BR2_PACKAGE_LOCKDEV=y
BR2_PACKAGE_PHYSFS=y
BR2_PACKAGE_JPEG=y
BR2_PACKAGE_JITTERENTROPY_LIBRARY=y
BR2_PACKAGE_LIBAIO=y
BR2_PACKAGE_LIBGPIOD2=y
BR2_PACKAGE_LIBGPIOD2_TOOLS=y
BR2_PACKAGE_LIBINPUT=y
@ -161,7 +170,7 @@ BR2_PACKAGE_LIBV4L=y
BR2_PACKAGE_LIBV4L_UTILS=y
BR2_PACKAGE_JSON_GLIB=y
BR2_PACKAGE_LIBFASTJSON=y
BR2_PACKAGE_SORD=y
BR2_PACKAGE_LIBXML2=y
BR2_PACKAGE_LIBCAMERA=y
BR2_PACKAGE_LIBCAMERA_V4L2=y
BR2_PACKAGE_LIBCAMERA_PIPELINE_RPI_VC4=y
@ -173,14 +182,15 @@ BR2_PACKAGE_LIBCURL=y
BR2_PACKAGE_LIBCURL_CURL=y
BR2_PACKAGE_LIBPSL=y
BR2_PACKAGE_SLIRP4NETNS=y
BR2_PACKAGE_FFTW=y
BR2_PACKAGE_GOBJECT_INTROSPECTION=y
BR2_PACKAGE_JEMALLOC=y
BR2_PACKAGE_LIBCAP_TOOLS=y
BR2_PACKAGE_LIBDAEMON=y
BR2_PACKAGE_LIBEVENT=y
BR2_PACKAGE_LIBUNWIND=y
BR2_PACKAGE_LIBUV=y
BR2_PACKAGE_NCURSES_WCHAR=y
BR2_PACKAGE_GSETTINGS_DESKTOP_SCHEMAS=y
BR2_PACKAGE_SHARED_MIME_INFO=y
BR2_PACKAGE_AARDVARK_DNS=y
BR2_PACKAGE_BLUEZ_TOOLS=y
BR2_PACKAGE_BLUEZ5_UTILS=y
@ -194,7 +204,7 @@ BR2_PACKAGE_BLUEZ5_UTILS_PLUGINS_SAP=y
BR2_PACKAGE_BLUEZ5_UTILS_PLUGINS_SIXAXIS=y
BR2_PACKAGE_BLUEZ5_UTILS_TOOLS_HID2HCI=y
BR2_PACKAGE_CRDA=y
# BR2_PACKAGE_IFUPDOWN_SCRIPTS is not set
BR2_PACKAGE_IFUPDOWN=y
BR2_PACKAGE_IPROUTE2=y
BR2_PACKAGE_IPUTILS=y
BR2_PACKAGE_IW=y
@ -206,6 +216,7 @@ BR2_PACKAGE_NETWORK_MANAGER_CLI=y
BR2_PACKAGE_NETWORK_MANAGER_MODEM_MANAGER=y
BR2_PACKAGE_OPENSSH=y
# BR2_PACKAGE_OPENSSH_SANDBOX is not set
BR2_PACKAGE_RPCBIND=y
BR2_PACKAGE_WGET=y
BR2_PACKAGE_WIRELESS_TOOLS=y
BR2_PACKAGE_WIRELESS_TOOLS_LIB=y
@ -230,13 +241,13 @@ BR2_PACKAGE_SUDO=y
BR2_PACKAGE_TIME=y
BR2_PACKAGE_TINI=y
BR2_PACKAGE_WHICH=y
BR2_PACKAGE_ACL=y
BR2_PACKAGE_COREUTILS=y
BR2_PACKAGE_COREUTILS_INDIVIDUAL_BINARIES=y
BR2_PACKAGE_EFIBOOTMGR=y
BR2_PACKAGE_HTOP=y
BR2_PACKAGE_NUMACTL=y
BR2_PACKAGE_PODMAN=y
BR2_PACKAGE_PODMAN_DRIVER_DEVICEMAPPER=y
BR2_PACKAGE_PROCPS_NG=y
BR2_PACKAGE_SHADOW=y
BR2_PACKAGE_SHADOW_SHADOWGRP=y
@ -262,6 +273,7 @@ BR2_PACKAGE_SYSTEMD_POLKIT=y
BR2_PACKAGE_SYSTEMD_RANDOMSEED=y
BR2_PACKAGE_SYSTEMD_REPART=y
BR2_PACKAGE_SYSTEMD_UTMP=y
# BR2_PACKAGE_SYSTEMD_VCONSOLE is not set
BR2_PACKAGE_TAR=y
BR2_PACKAGE_UTIL_LINUX_BINARIES=y
BR2_PACKAGE_UTIL_LINUX_HWCLOCK=y
@ -298,24 +310,17 @@ BR2_PACKAGE_HOST_MKPASSWD=y
BR2_PACKAGE_HOST_MTOOLS=y
BR2_PACKAGE_HOST_PKGCONF=y
BR2_PACKAGE_BTSPEAKER=y
BR2_PACKAGE_HOSTNAME_SERVICE=y
BR2_PACKAGE_CK=y
BR2_PACKAGE_KSM_PRELOAD=y
BR2_PACKAGE_KSMTUNED=y
BR2_PACKAGE_NCPAMIXER=y
BR2_PACKAGE_OPENFEC=y
BR2_PACKAGE_OVOS_BUS_SERVER=y
BR2_PACKAGE_OVOS_CONTAINERS=y
BR2_PACKAGE_OVOS_CONTAINERS_ARCH="arm64"
BR2_PACKAGE_OVOS_CONTAINERS_GUI=y
BR2_PACKAGE_OVOS_SPLASH=y
BR2_PACKAGE_RESPEAKER=y
BR2_PACKAGE_RNNNOISE_LADSPA=y
BR2_PACKAGE_RPI_BLUETOOTH=y
BR2_PACKAGE_RPI_EEPROM=y
BR2_PACKAGE_SYSBENCH=y
BR2_PACKAGE_USERLAND_TOOLS=y
BR2_PACKAGE_VOCALFUSION=y
BR2_PACKAGE_PYTHON_ADAFRUIT_BLINKA=y
BR2_PACKAGE_PYTHON_SMBUS2=y
BR2_PACKAGE_PYTHON_OVOS_GUI=y
BR2_PACKAGE_PYTHON_OVOS_BACKEND_CLIENT=y
BR2_PACKAGE_PYTHON_OVOS_GUI_PLUGIN_SHELL_COMPANION=y

28
buildroot-external/kernel/ovos.config
View File

@ -1,4 +1,4 @@
CONFIG_LOCALVERSION="-ovos-buildroot"
CONFIG_LOCALVERSION="-ovos"
CONFIG_EXPERT=y
# GCC plugins are disabled by linux.mk, disable them here to reduce
@ -8,12 +8,8 @@ CONFIG_GCC_PLUGINS=n
CONFIG_CMDLINE=""
CONFIG_PANIC_TIMEOUT=5
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set
CONFIG_PREEMPT_RT=y
CONFIG_PREEMPT_COUNT=y
CONFIG_PREEMPTION=y
CONFIG_PSI=y
CONFIG_IKCONFIG=y
@ -56,12 +52,19 @@ CONFIG_TMPFS_XATTR=y
CONFIG_SECCOMP=y
CONFIG_SECCOMP_FILTER=y
CONFIG_AUDIT=y
# CONFIG_AUDIT is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITY_SELINUX is not set
CONFIG_CRYPTO=y
CONFIG_CRYPTO_LZ4=y
CONFIG_CRYPTO_MICHAEL_MIC=y
CONFIG_CRYPTO_USER=m
CONFIG_CRYPTO_USER_API_HASH=m
CONFIG_CRYPTO_USER_API_SKCIPHER=m
CONFIG_CRYPTO_USER_API_RNG=m
CONFIG_CRYPTO_USER_API_AEAD=m
CONFIG_PARTITION_ADVANCED=y
CONFIG_EFI_PARTITION=y
@ -70,7 +73,7 @@ CONFIG_MSDOS_PARTITION=y
# CONFIG_LOGO is not set
# CONFIG_DEBUG_STACK_USAGE is not set
CONFIG_BT=m
CONFIG_BT=y
CONFIG_BT_BREDR=y
CONFIG_BT_RFCOMM=m
CONFIG_BT_RFCOMM_TTY=y
@ -78,16 +81,24 @@ CONFIG_BT_LE=y
CONFIG_BT_BNEP=m
CONFIG_BT_BNEP_MC_FILTER=y
CONFIG_BT_BNEP_PROTO_FILTER=y
CONFIG_BT_CMTP=m
CONFIG_BT_HIDP=m
CONFIG_BT_LEDS=y
CONFIG_IPV6=y
CONFIG_IPV6_ROUTER_PREF=y
CONFIG_IPV6_REACHABILITY_PROBE=y
CONFIG_IPV6_SIT=m
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_MROUTE=y
CONFIG_IPV6_MULTIPLE_TABLES=y
CONFIG_IPV6_MROUTE=y
CONFIG_MPTCP=y
CONFIG_MPTCP_IPV6=y
CONFIG_NF_TABLES=m
CONFIG_NF_TABLES_INET=y
CONFIG_NF_TABLES_NETDEV=y
@ -138,6 +149,7 @@ CONFIG_NFT_BRIDGE_REJECT=m
CONFIG_NETFILTER_NETLINK_QUEUE=m
CONFIG_NETFILTER_XT_SET=m
CONFIG_NETFILTER_XT_MATCH_PKTTYPE=m
CONFIG_NETFILTER_XT_MARK=m
CONFIG_IP_SET=m
CONFIG_IP_SET_BITMAP_IP=m

16
buildroot-external/package/btspeaker/0001-btuart-reduced-baud-rate-rpi3b.patch
View File

@ -1,16 +0,0 @@
Bluetooth: hci0: Frame reassembly failed (-84)
https://github.com/raspberrypi/firmware/issues/1150
Signed-off-by: Luca Giovenzana <luca@giovenzana.org>
--- btuart.orig 2020-03-25 03:05:24.491176583 +0100
+++ btuart 2020-03-25 03:05:43.603107833 +0100
@@ -19,7 +19,7 @@ if [ "$uart0" = "$serial1" ] ; then
if [ "$uart0_pins" = "16" ] ; then
$HCIATTACH /dev/serial1 bcm43xx 3000000 flow - $BDADDR
else
- $HCIATTACH /dev/serial1 bcm43xx 921600 noflow - $BDADDR
+ $HCIATTACH /dev/serial1 bcm43xx 460800 noflow - $BDADDR
fi
else
$HCIATTACH /dev/serial1 bcm43xx 460800 noflow - $BDADDR

14
buildroot-external/package/btspeaker/brcm_bt.service
View File

@ -1,14 +0,0 @@
[Unit]
Description=Broadcom BCM4343* bluetooth HCI
Before=bluetooth.service
Before=btspeaker.service
Requires=dev-serial1.device
After=dev-serial1.device
ConditionFileNotEmpty=/proc/device-tree/soc/gpio@7e200000/bt_pins/brcm,pins
[Service]
Type=forking
ExecStart=/usr/bin/btuart
[Install]
WantedBy=multi-user.target

8
buildroot-external/package/btspeaker/bthelper@.service
View File

@ -1,8 +0,0 @@
[Unit]
Description=Raspberry Pi bluetooth helper
Requires=bluetooth.service
After=bluetooth.service
[Service]
Type=simple
ExecStart=/usr/bin/bthelper %I

25
buildroot-external/package/btspeaker/btspeaker.mk
View File

@ -10,41 +10,16 @@ BTSPEAKER_SITE_METHOD = local
BTSPEAKER_LICENSE = Apache License 2.0
BTSPEAKER_LICENSE_FILES = LICENSE
define BTSPEAKER_BUILD_CMDS
curl -L -o $(@D)/BCM43430A1.hcd https://raw.githubusercontent.com/RPi-Distro/bluez-firmware/e7fd166981ab4bb9a36c2d1500205a078a35714d/broadcom/BCM43430A1.hcd
curl -L -o $(@D)/BCM4345C0.hcd https://raw.githubusercontent.com/RPi-Distro/bluez-firmware/e7fd166981ab4bb9a36c2d1500205a078a35714d/broadcom/BCM4345C0.hcd
curl -L -o $(@D)/btuart https://raw.githubusercontent.com/RPi-Distro/pi-bluetooth/6f6386e91e33966d3c4a3cfee72d61e14c6a11ef/usr/bin/btuart
curl -L -o $(@D)/bthelper https://raw.githubusercontent.com/RPi-Distro/pi-bluetooth/6f6386e91e33966d3c4a3cfee72d61e14c6a11ef/usr/bin/bthelper
curl -L -o $(@D)/90-pi-bluetooth.rules https://raw.githubusercontent.com/RPi-Distro/pi-bluetooth/6f6386e91e33966d3c4a3cfee72d61e14c6a11ef/lib/udev/rules.d/90-pi-bluetooth.rules
patch $(@D)/btuart $(@D)/0001-btuart-reduced-baud-rate-rpi3b.patch
endef
define BTSPEAKER_INSTALL_TARGET_CMDS
$(INSTALL) -D -m 644 $(@D)/btspeaker.service \
$(TARGET_DIR)/usr/lib/systemd/system/btspeaker.service
$(INSTALL) -D -m 644 $(@D)/brcm_bt.service \
$(TARGET_DIR)/usr/lib/systemd/system/brcm_bt.service
$(INSTALL) -D -m 644 $(@D)/bthelper@.service \
$(TARGET_DIR)/usr/lib/systemd/system/bthelper@.service
mkdir -p $(TARGET_DIR)/etc/bluetooth
$(INSTALL) -D -m 644 $(@D)/main.conf \
$(TARGET_DIR)/etc/bluetooth/main.conf
$(INSTALL) -D -m 600 $(@D)/pin.conf \
$(TARGET_DIR)/etc/bluetooth/pin.conf
$(INSTALL) -d $(TARGET_DIR)/usr/bin
$(INSTALL) -m 0755 $(@D)/btuart $(TARGET_DIR)/usr/bin/
$(INSTALL) -m 0755 $(@D)/bthelper $(TARGET_DIR)/usr/bin/
$(INSTALL) -d $(TARGET_DIR)/lib/firmware/brcm
$(INSTALL) -m 0644 $(@D)/*.hcd $(TARGET_DIR)/lib/firmware/brcm/
$(INSTALL) -d $(TARGET_DIR)/usr/lib/udev/rules.d
$(INSTALL) -m 0644 $(@D)/90-pi-bluetooth.rules $(TARGET_DIR)/usr/lib/udev/rules.d/
endef
$(eval $(generic-package))

4
buildroot-external/package/btspeaker/main.conf
View File

@ -2,3 +2,7 @@
Name = OpenVoiceOS
Class = 0x41C
DiscoverableTimeout = 0
Experimental=true
[Policy]
AutoEnable=true

30
buildroot-external/package/rpi-bluetooth/0001-Fix-Bluetooth-hci0-Frame-reassembly-failed-84.patch Normal file
View File

@ -0,0 +1,30 @@
From b74ac4e14e4fcbb76b4cea86573cf602f2b28f8b Mon Sep 17 00:00:00 2001
Message-Id: <b74ac4e14e4fcbb76b4cea86573cf602f2b28f8b.1649951264.git.stefan@agner.ch>
From: Luca Giovenzana <luca@giovenzana.org>
Date: Thu, 14 Apr 2022 14:55:56 +0200
Subject: [PATCH] Fix Bluetooth: hci0: Frame reassembly failed (-84)
Lower UART baudrate to fix Frame reassembly failed (-84) issues.
https://github.com/raspberrypi/firmware/issues/1150
Signed-off-by: Luca Giovenzana <luca@giovenzana.org>
---
usr/bin/btuart | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/usr/bin/btuart b/usr/bin/btuart
index 493fd86..cb99a4f 100755
--- a/usr/bin/btuart
+++ b/usr/bin/btuart
@@ -25,7 +25,7 @@ if [ "$uart0" = "$serial1" ] ; then
if [ "$uart0_pins" = "16" ] ; then
$HCIATTACH /dev/serial1 bcm43xx 3000000 flow - $BDADDR
else
- $HCIATTACH /dev/serial1 bcm43xx 921600 noflow - $BDADDR
+ $HCIATTACH /dev/serial1 bcm43xx 460800 noflow - $BDADDR
fi
else
$HCIATTACH /dev/serial1 bcm43xx 460800 noflow - $BDADDR
--
2.35.1

36
buildroot-external/package/rpi-bluetooth/0002-Test-if-WiFi-Bluetooth-module-is-fitted-on-Compute-M.patch Normal file
View File

@ -0,0 +1,36 @@
From 2bfc211b1dc619cce4ea500227576ce1d59c404e Mon Sep 17 00:00:00 2001
Message-Id: <2bfc211b1dc619cce4ea500227576ce1d59c404e.1649951264.git.stefan@agner.ch>
In-Reply-To: <b74ac4e14e4fcbb76b4cea86573cf602f2b28f8b.1649951264.git.stefan@agner.ch>
References: <b74ac4e14e4fcbb76b4cea86573cf602f2b28f8b.1649951264.git.stefan@agner.ch>
From: Stefan Agner <stefan@agner.ch>
Date: Thu, 14 Apr 2022 15:29:39 +0200
Subject: [PATCH] Test if WiFi/Bluetooth module is fitted on Compute Module 4
Signed-off-by: Stefan Agner <stefan@agner.ch>
---
usr/bin/btuart | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/usr/bin/btuart b/usr/bin/btuart
index cb99a4f..046227c 100755
--- a/usr/bin/btuart
+++ b/usr/bin/btuart
@@ -11,6 +11,15 @@ else
BDADDR=`printf b8:27:eb:%02x:%02x:%02x $((0x$B1 ^ 0xaa)) $((0x$B2 ^ 0xaa)) $((0x$B3 ^ 0xaa))`
fi
+if grep -q "raspberrypi,4-compute-module" /proc/device-tree/compatible; then
+ BOARDREV_EXT=$(xxd -p -g4 /proc/device-tree/chosen/rpi-boardrev-ext)
+ # Ceck Bit 30: Whether the Compute Module has a WiFi module fitted
+ if [ $((16#${BOARDREV_EXT} & 16#40000000)) -gt 0 ]; then
+ # No WiFi/Bluetooth
+ exit 0
+ fi
+fi
+
# Bail out if the kernel is managing the Bluetooth modem initialisation
if ( dmesg | grep -q -E "hci[0-9]+: BCM: chip" ); then
# On-board bluetooth is already enabled
--
2.35.1

7
buildroot-external/package/rpi-bluetooth/Config.in Normal file
View File

@ -0,0 +1,7 @@
config BR2_PACKAGE_RPI_BLUETOOTH
bool "Bluetooth scripts for Raspberry Pi"
depends on BR2_PACKAGE_BLUEZ5_UTILS_CLIENT
depends on BR2_PACKAGE_BRCMFMAC_SDIO_FIRMWARE_RPI_BT
select BR2_PACKAGE_BLUEZ5_UTILS_DEPRECATED
help
Install Bluetooth scripts for Raspberry Pi

11
buildroot-external/package/rpi-bluetooth/bthelper@.service Normal file
View File

@ -0,0 +1,11 @@
[Unit]
Description=Raspberry Pi bluetooth helper
Requires=hciuart.service bluetooth.service
After=hciuart.service
Before=bluetooth.service
[Service]
Type=oneshot
ExecCondition=/bin/sh -c '[ "$(cat /proc/device-tree/$(cat /proc/device-tree/aliases/bluetooth)/status)" != "okay" ]'
ExecStart=/usr/bin/bthelper %I
RemainAfterExit=yes

10
buildroot-external/package/rpi-bluetooth/hcidisable.service Normal file
View File

@ -0,0 +1,10 @@
[Unit]
Description=Remove HCI kernel driver if WiFi/Bluetooth module is not present
ConditionPathExists=!/sys/bus/sdio/devices/mmc1:0001:1
[Service]
Type=forking
ExecStart=/usr/sbin/modprobe -r hci_uart
[Install]
WantedBy=ovos-hardware.target

12
buildroot-external/package/rpi-bluetooth/hciuart.service Normal file
View File

@ -0,0 +1,12 @@
[Unit]
Description=Configure Bluetooth Modems connected by UART
ConditionFileNotEmpty=/proc/device-tree/soc/gpio@7e200000/bt_pins/brcm,pins
After=dev-serial1.device
[Service]
Type=forking
ExecCondition=/bin/sh -c '[ "$(cat /proc/device-tree/$(cat /proc/device-tree/aliases/bluetooth)/status)" != "okay" ]'
ExecStart=/usr/bin/btuart
[Install]
WantedBy=ovos-hardware.target

26
buildroot-external/package/rpi-bluetooth/rpi-bluetooth.mk Normal file
View File

@ -0,0 +1,26 @@
################################################################################
#
# rpi-bluetooth
#
################################################################################
RPI_BLUETOOTH_VERSION = 23af66cff597c80523bf9581d7f75d387227f183
RPI_BLUETOOTH_SITE = $(call github,RPi-Distro,pi-bluetooth,$(RPI_BLUETOOTH_VERSION))
RPI_BLUETOOTH_LICENSE = BSD-3-Clause
RPI_BLUETOOTH_LICENSE_FILES = debian/copyright
define RPI_BLUETOOTH_INSTALL_TARGET_CMDS
$(INSTALL) -d $(TARGET_DIR)/etc/systemd/system/ovos-hardware.target.wants
$(INSTALL) -m 0644 $(BR2_EXTERNAL_HASSOS_PATH)/package/rpi-bluetooth/hciuart.service $(TARGET_DIR)/usr/lib/systemd/system/
$(INSTALL) -m 0644 $(BR2_EXTERNAL_HASSOS_PATH)/package/pi-bluetooth/hcidisable.service $(TARGET_DIR)/usr/lib/systemd/system/
$(INSTALL) -m 0644 $(BR2_EXTERNAL_HASSOS_PATH)/package/rpi-bluetooth/bthelper@.service $(TARGET_DIR)/usr/lib/systemd/system/
$(INSTALL) -d $(TARGET_DIR)/usr/bin
$(INSTALL) -m 0755 $(@D)/usr/bin/btuart $(TARGET_DIR)/usr/bin/
$(INSTALL) -m 0755 $(@D)/usr/bin/bthelper $(TARGET_DIR)/usr/bin/
$(INSTALL) -d $(TARGET_DIR)/usr/lib/udev/rules.d
$(INSTALL) -m 0644 $(@D)/lib/udev/rules.d/90-pi-bluetooth.rules $(TARGET_DIR)/usr/lib/udev/rules.d/
endef
$(eval $(generic-package))

6
buildroot-external/package/rpi-eeprom/rpi-eeprom.mk
View File

@ -3,16 +3,16 @@
# rpi-eeprom
#
#############################################################
RPI_EEPROM_VERSION = e430a41e7323a1e28fb42b53cf79e5ba9b5ee975
RPI_EEPROM_VERSION = 945d708fd0b200e62fcedd48236c7f9c43a44062
RPI_EEPROM_SITE = $(call github,raspberrypi,rpi-eeprom,$(RPI_EEPROM_VERSION))
RPI_EEPROM_LICENSE = BSD-3-Clause
RPI_EEPROM_LICENSE_FILES = LICENSE
RPI_EEPROM_INSTALL_IMAGES = YES
ifeq ($(BR2_PACKAGE_RPI_EEPROM_RPI4),y)
RPI_EEPROM_FIRMWARE_PATH = firmware-2711/stable/pieeprom-2024-05-17.bin
RPI_EEPROM_FIRMWARE_PATH = firmware-2711/stable/pieeprom-2024-07-30.bin
else ifeq ($(BR2_PACKAGE_RPI_EEPROM_RPI5),y) # Raspberry Pi 5
RPI_EEPROM_FIRMWARE_PATH = firmware-2712/stable/pieeprom-2024-06-05.bin
RPI_EEPROM_FIRMWARE_PATH = firmware-2712/stable/pieeprom-2024-07-30.bin
endif
define RPI_EEPROM_BUILD_CMDS

52
buildroot-external/patches/linux/0001-ipv6-add-option-to-explicitly-enable-reachability-te.patch Normal file
View File

@ -0,0 +1,52 @@
From 76591e4075194cf717dc085b8285912f706bcd46 Mon Sep 17 00:00:00 2001
From: Stefan Agner <stefan@agner.ch>
Date: Tue, 28 Mar 2023 12:02:10 +0200
Subject: [PATCH] ipv6: add option to explicitly enable reachability test
Systems which act as host as well as router might prefer the host
behavior. Currently the kernel does not allow to use IPv6 forwarding
globally and at the same time use route reachability probing.
Add a compile time flag to enable route reachability probe in any
case.
Signed-off-by: Stefan Agner <stefan@agner.ch>
---
net/ipv6/Kconfig | 9 +++++++++
net/ipv6/route.c | 3 ++-
2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index 08d4b7132d4c..242bf2eeb7ae 100644
--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -48,6 +48,15 @@ config IPV6_OPTIMISTIC_DAD
If unsure, say N.
+config IPV6_REACHABILITY_PROBE
+ bool "IPv6: Always use reachability probing (RFC 4191)"
+ help
+ By default reachability probing is disabled on router devices (when
+ IPv6 forwarding is enabled). This option explicitly enables
+ reachability probing always.
+
+ If unsure, say N.
+
config INET6_AH
tristate "IPv6: AH transformation"
select XFRM_AH
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 56525b5b95a2..916769b9a772 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2211,7 +2211,8 @@ struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table,
strict |= flags & RT6_LOOKUP_F_IFACE;
strict |= flags & RT6_LOOKUP_F_IGNORE_LINKSTATE;
- if (net->ipv6.devconf_all->forwarding == 0)
+ if (net->ipv6.devconf_all->forwarding == 0 ||
+ IS_ENABLED(CONFIG_IPV6_REACHABILITY_PROBE))
strict |= RT6_LOOKUP_F_REACHABLE;
rcu_read_lock();

54
buildroot-external/patches/linux/0001-sched-Constrain-locks-in-sched_submit_work.patch
View File

@ -1,54 +0,0 @@
From 587ff8c1e0d4260e84573d21d2387b7bc3f6c055 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 8 Sep 2023 18:22:48 +0200
Subject: [PATCH 001/198] sched: Constrain locks in sched_submit_work()
Even though sched_submit_work() is ran from preemptible context,
it is discouraged to have it use blocking locks due to the recursion
potential.
Enforce this.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20230908162254.999499-2-bigeasy@linutronix.de
---
kernel/sched/core.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 820880960513..3593fa308098 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6724,11 +6724,18 @@ void __noreturn do_task_dead(void)
static inline void sched_submit_work(struct task_struct *tsk)
{
+ static DEFINE_WAIT_OVERRIDE_MAP(sched_map, LD_WAIT_CONFIG);
unsigned int task_flags;
if (task_is_running(tsk))
return;
+ /*
+ * Establish LD_WAIT_CONFIG context to ensure none of the code called
+ * will use a blocking primitive -- which would lead to recursion.
+ */
+ lock_map_acquire_try(&sched_map);
+
task_flags = tsk->flags;
/*
* If a worker goes to sleep, notify and ask workqueue whether it
@@ -6753,6 +6760,8 @@ static inline void sched_submit_work(struct task_struct *tsk)
* make sure to submit it to avoid deadlocks.
*/
blk_flush_plug(tsk->plug, true);
+
+ lock_map_release(&sched_map);
}
static void sched_update_worker(struct task_struct *tsk)
--
2.45.2

86
buildroot-external/patches/linux/0002-locking-rtmutex-Avoid-unconditional-slowpath-for-DEB.patch
View File

@ -1,86 +0,0 @@
From eda74bfb4606440876eee1775a1bb23923fb02cc Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 8 Sep 2023 18:22:49 +0200
Subject: [PATCH 002/198] locking/rtmutex: Avoid unconditional slowpath for
DEBUG_RT_MUTEXES
With DEBUG_RT_MUTEXES enabled the fast-path rt_mutex_cmpxchg_acquire()
always fails and all lock operations take the slow path.
Provide a new helper inline rt_mutex_try_acquire() which maps to
rt_mutex_cmpxchg_acquire() in the non-debug case. For the debug case
it invokes rt_mutex_slowtrylock() which can acquire a non-contended
rtmutex under full debug coverage.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20230908162254.999499-3-bigeasy@linutronix.de
---
kernel/locking/rtmutex.c | 21 ++++++++++++++++++++-
kernel/locking/ww_rt_mutex.c | 2 +-
2 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index 21db0df0eb00..bcec0533a0cc 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -218,6 +218,11 @@ static __always_inline bool rt_mutex_cmpxchg_acquire(struct rt_mutex_base *lock,
return try_cmpxchg_acquire(&lock->owner, &old, new);
}
+static __always_inline bool rt_mutex_try_acquire(struct rt_mutex_base *lock)
+{
+ return rt_mutex_cmpxchg_acquire(lock, NULL, current);
+}
+
static __always_inline bool rt_mutex_cmpxchg_release(struct rt_mutex_base *lock,
struct task_struct *old,
struct task_struct *new)
@@ -297,6 +302,20 @@ static __always_inline bool rt_mutex_cmpxchg_acquire(struct rt_mutex_base *lock,
}
+static int __sched rt_mutex_slowtrylock(struct rt_mutex_base *lock);
+
+static __always_inline bool rt_mutex_try_acquire(struct rt_mutex_base *lock)
+{
+ /*
+ * With debug enabled rt_mutex_cmpxchg trylock() will always fail.
+ *
+ * Avoid unconditionally taking the slow path by using
+ * rt_mutex_slow_trylock() which is covered by the debug code and can
+ * acquire a non-contended rtmutex.
+ */
+ return rt_mutex_slowtrylock(lock);
+}
+
static __always_inline bool rt_mutex_cmpxchg_release(struct rt_mutex_base *lock,
struct task_struct *old,
struct task_struct *new)
@@ -1755,7 +1774,7 @@ static int __sched rt_mutex_slowlock(struct rt_mutex_base *lock,
static __always_inline int __rt_mutex_lock(struct rt_mutex_base *lock,
unsigned int state)
{
- if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current)))
+ if (likely(rt_mutex_try_acquire(lock)))
return 0;
return rt_mutex_slowlock(lock, NULL, state);
diff --git a/kernel/locking/ww_rt_mutex.c b/kernel/locking/ww_rt_mutex.c
index d1473c624105..c7196de838ed 100644
--- a/kernel/locking/ww_rt_mutex.c
+++ b/kernel/locking/ww_rt_mutex.c
@@ -62,7 +62,7 @@ __ww_rt_mutex_lock(struct ww_mutex *lock, struct ww_acquire_ctx *ww_ctx,
}
mutex_acquire_nest(&rtm->dep_map, 0, 0, nest_lock, ip);
- if (likely(rt_mutex_cmpxchg_acquire(&rtm->rtmutex, NULL, current))) {
+ if (likely(rt_mutex_try_acquire(&rtm->rtmutex))) {
if (ww_ctx)
ww_mutex_set_context_fastpath(lock, ww_ctx);
return 0;
--
2.45.2

63
buildroot-external/patches/linux/0003-sched-Extract-__schedule_loop.patch
View File

@ -1,63 +0,0 @@
From 105d9b72e13aab3277bd67e131719c4ed0ca94b5 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 8 Sep 2023 18:22:50 +0200
Subject: [PATCH 003/198] sched: Extract __schedule_loop()
There are currently two implementations of this basic __schedule()
loop, and there is soon to be a third.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20230908162254.999499-4-bigeasy@linutronix.de
---
kernel/sched/core.c | 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 3593fa308098..30659d67daf6 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6774,16 +6774,21 @@ static void sched_update_worker(struct task_struct *tsk)
}
}
-asmlinkage __visible void __sched schedule(void)
+static __always_inline void __schedule_loop(unsigned int sched_mode)
{
- struct task_struct *tsk = current;
-
- sched_submit_work(tsk);
do {
preempt_disable();
- __schedule(SM_NONE);
+ __schedule(sched_mode);
sched_preempt_enable_no_resched();
} while (need_resched());
+}
+
+asmlinkage __visible void __sched schedule(void)
+{
+ struct task_struct *tsk = current;
+
+ sched_submit_work(tsk);
+ __schedule_loop(SM_NONE);
sched_update_worker(tsk);
}
EXPORT_SYMBOL(schedule);
@@ -6847,11 +6852,7 @@ void __sched schedule_preempt_disabled(void)
#ifdef CONFIG_PREEMPT_RT
void __sched notrace schedule_rtlock(void)
{
- do {
- preempt_disable();
- __schedule(SM_RTLOCK_WAIT);
- sched_preempt_enable_no_resched();
- } while (need_resched());
+ __schedule_loop(SM_RTLOCK_WAIT);
}
NOKPROBE_SYMBOL(schedule_rtlock);
#endif
--
2.45.2

137
buildroot-external/patches/linux/0004-sched-Provide-rt_mutex-specific-scheduler-helpers.patch
View File

@ -1,137 +0,0 @@
From 92d2f65eb79154dc9a01fee79cfb29b8c7c643c0 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 8 Sep 2023 18:22:51 +0200
Subject: [PATCH 004/198] sched: Provide rt_mutex specific scheduler helpers
With PREEMPT_RT there is a rt_mutex recursion problem where
sched_submit_work() can use an rtlock (aka spinlock_t). More
specifically what happens is:
mutex_lock() /* really rt_mutex */
...
__rt_mutex_slowlock_locked()
task_blocks_on_rt_mutex()
// enqueue current task as waiter
// do PI chain walk
rt_mutex_slowlock_block()
schedule()
sched_submit_work()
...
spin_lock() /* really rtlock */
...
__rt_mutex_slowlock_locked()
task_blocks_on_rt_mutex()
// enqueue current task as waiter *AGAIN*
// *CONFUSION*
Fix this by making rt_mutex do the sched_submit_work() early, before
it enqueues itself as a waiter -- before it even knows *if* it will
wait.
[[ basically Thomas' patch but with different naming and a few asserts
added ]]
Originally-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20230908162254.999499-5-bigeasy@linutronix.de
---
include/linux/sched.h | 3 +++
include/linux/sched/rt.h | 4 ++++
kernel/sched/core.c | 36 ++++++++++++++++++++++++++++++++----
3 files changed, 39 insertions(+), 4 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 77f01ac385f7..67623ffd4a8e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -911,6 +911,9 @@ struct task_struct {
* ->sched_remote_wakeup gets used, so it can be in this word.
*/
unsigned sched_remote_wakeup:1;
+#ifdef CONFIG_RT_MUTEXES
+ unsigned sched_rt_mutex:1;
+#endif
/* Bit to tell LSMs we're in execve(): */
unsigned in_execve:1;
diff --git a/include/linux/sched/rt.h b/include/linux/sched/rt.h
index 994c25640e15..b2b9e6eb9683 100644
--- a/include/linux/sched/rt.h
+++ b/include/linux/sched/rt.h
@@ -30,6 +30,10 @@ static inline bool task_is_realtime(struct task_struct *tsk)
}
#ifdef CONFIG_RT_MUTEXES
+extern void rt_mutex_pre_schedule(void);
+extern void rt_mutex_schedule(void);
+extern void rt_mutex_post_schedule(void);
+
/*
* Must hold either p->pi_lock or task_rq(p)->lock.
*/
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 30659d67daf6..a1fc8d66c7ac 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6727,9 +6727,6 @@ static inline void sched_submit_work(struct task_struct *tsk)
static DEFINE_WAIT_OVERRIDE_MAP(sched_map, LD_WAIT_CONFIG);
unsigned int task_flags;
- if (task_is_running(tsk))
- return;
-
/*
* Establish LD_WAIT_CONFIG context to ensure none of the code called
* will use a blocking primitive -- which would lead to recursion.
@@ -6787,7 +6784,12 @@ asmlinkage __visible void __sched schedule(void)
{
struct task_struct *tsk = current;
- sched_submit_work(tsk);
+#ifdef CONFIG_RT_MUTEXES
+ lockdep_assert(!tsk->sched_rt_mutex);
+#endif
+
+ if (!task_is_running(tsk))
+ sched_submit_work(tsk);
__schedule_loop(SM_NONE);
sched_update_worker(tsk);
}
@@ -7048,6 +7050,32 @@ static void __setscheduler_prio(struct task_struct *p, int prio)
#ifdef CONFIG_RT_MUTEXES
+/*
+ * Would be more useful with typeof()/auto_type but they don't mix with
+ * bit-fields. Since it's a local thing, use int. Keep the generic sounding
+ * name such that if someone were to implement this function we get to compare
+ * notes.
+ */
+#define fetch_and_set(x, v) ({ int _x = (x); (x) = (v); _x; })
+
+void rt_mutex_pre_schedule(void)
+{
+ lockdep_assert(!fetch_and_set(current->sched_rt_mutex, 1));
+ sched_submit_work(current);
+}
+
+void rt_mutex_schedule(void)
+{
+ lockdep_assert(current->sched_rt_mutex);
+ __schedule_loop(SM_NONE);
+}
+
+void rt_mutex_post_schedule(void)
+{
+ sched_update_worker(current);
+ lockdep_assert(fetch_and_set(current->sched_rt_mutex, 0));
+}
+
static inline int __rt_effective_prio(struct task_struct *pi_task, int prio)
{
if (pi_task)
--
2.45.2

191
buildroot-external/patches/linux/0005-locking-rtmutex-Use-rt_mutex-specific-scheduler-help.patch
View File

@ -1,191 +0,0 @@
From 12c75059e5431cc6e68f1b77e4e248040cd8779c Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 8 Sep 2023 18:22:52 +0200
Subject: [PATCH 005/198] locking/rtmutex: Use rt_mutex specific scheduler
helpers
Have rt_mutex use the rt_mutex specific scheduler helpers to avoid
recursion vs rtlock on the PI state.
[[ peterz: adapted to new names ]]
Reported-by: Crystal Wood <swood@redhat.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20230908162254.999499-6-bigeasy@linutronix.de
---
kernel/futex/pi.c | 11 +++++++++++
kernel/locking/rtmutex.c | 14 ++++++++++++--
kernel/locking/rwbase_rt.c | 6 ++++++
kernel/locking/rwsem.c | 8 +++++++-
kernel/locking/spinlock_rt.c | 4 ++++
5 files changed, 40 insertions(+), 3 deletions(-)
diff --git a/kernel/futex/pi.c b/kernel/futex/pi.c
index ce2889f12375..f8e65b27d9d6 100644
--- a/kernel/futex/pi.c
+++ b/kernel/futex/pi.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/slab.h>
+#include <linux/sched/rt.h>
#include <linux/sched/task.h>
#include "futex.h"
@@ -1002,6 +1003,12 @@ int futex_lock_pi(u32 __user *uaddr, unsigned int flags, ktime_t *time, int tryl
goto no_block;
}
+ /*
+ * Must be done before we enqueue the waiter, here is unfortunately
+ * under the hb lock, but that *should* work because it does nothing.
+ */
+ rt_mutex_pre_schedule();
+
rt_mutex_init_waiter(&rt_waiter);
/*
@@ -1052,6 +1059,10 @@ int futex_lock_pi(u32 __user *uaddr, unsigned int flags, ktime_t *time, int tryl
if (ret && !rt_mutex_cleanup_proxy_lock(&q.pi_state->pi_mutex, &rt_waiter))
ret = 0;
+ /*
+ * Waiter is unqueued.
+ */
+ rt_mutex_post_schedule();
no_block:
/*
* Fixup the pi_state owner and possibly acquire the lock if we
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index bcec0533a0cc..a3fe05dfd0d8 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -1632,7 +1632,7 @@ static int __sched rt_mutex_slowlock_block(struct rt_mutex_base *lock,
raw_spin_unlock_irq(&lock->wait_lock);
if (!owner || !rtmutex_spin_on_owner(lock, waiter, owner))
- schedule();
+ rt_mutex_schedule();
raw_spin_lock_irq(&lock->wait_lock);
set_current_state(state);
@@ -1661,7 +1661,7 @@ static void __sched rt_mutex_handle_deadlock(int res, int detect_deadlock,
WARN(1, "rtmutex deadlock detected\n");
while (1) {
set_current_state(TASK_INTERRUPTIBLE);
- schedule();
+ rt_mutex_schedule();
}
}
@@ -1756,6 +1756,15 @@ static int __sched rt_mutex_slowlock(struct rt_mutex_base *lock,
unsigned long flags;
int ret;
+ /*
+ * Do all pre-schedule work here, before we queue a waiter and invoke
+ * PI -- any such work that trips on rtlock (PREEMPT_RT spinlock) would
+ * otherwise recurse back into task_blocks_on_rt_mutex() through
+ * rtlock_slowlock() and will then enqueue a second waiter for this
+ * same task and things get really confusing real fast.
+ */
+ rt_mutex_pre_schedule();
+
/*
* Technically we could use raw_spin_[un]lock_irq() here, but this can
* be called in early boot if the cmpxchg() fast path is disabled
@@ -1767,6 +1776,7 @@ static int __sched rt_mutex_slowlock(struct rt_mutex_base *lock,
raw_spin_lock_irqsave(&lock->wait_lock, flags);
ret = __rt_mutex_slowlock_locked(lock, ww_ctx, state);
raw_spin_unlock_irqrestore(&lock->wait_lock, flags);
+ rt_mutex_post_schedule();
return ret;
}
diff --git a/kernel/locking/rwbase_rt.c b/kernel/locking/rwbase_rt.c
index 25ec0239477c..c7258cb32d91 100644
--- a/kernel/locking/rwbase_rt.c
+++ b/kernel/locking/rwbase_rt.c
@@ -71,6 +71,7 @@ static int __sched __rwbase_read_lock(struct rwbase_rt *rwb,
struct rt_mutex_base *rtm = &rwb->rtmutex;
int ret;
+ rwbase_pre_schedule();
raw_spin_lock_irq(&rtm->wait_lock);
/*
@@ -125,6 +126,7 @@ static int __sched __rwbase_read_lock(struct rwbase_rt *rwb,
rwbase_rtmutex_unlock(rtm);
trace_contention_end(rwb, ret);
+ rwbase_post_schedule();
return ret;
}
@@ -237,6 +239,8 @@ static int __sched rwbase_write_lock(struct rwbase_rt *rwb,
/* Force readers into slow path */
atomic_sub(READER_BIAS, &rwb->readers);
+ rwbase_pre_schedule();
+
raw_spin_lock_irqsave(&rtm->wait_lock, flags);
if (__rwbase_write_trylock(rwb))
goto out_unlock;
@@ -248,6 +252,7 @@ static int __sched rwbase_write_lock(struct rwbase_rt *rwb,
if (rwbase_signal_pending_state(state, current)) {
rwbase_restore_current_state();
__rwbase_write_unlock(rwb, 0, flags);
+ rwbase_post_schedule();
trace_contention_end(rwb, -EINTR);
return -EINTR;
}
@@ -266,6 +271,7 @@ static int __sched rwbase_write_lock(struct rwbase_rt *rwb,
out_unlock:
raw_spin_unlock_irqrestore(&rtm->wait_lock, flags);
+ rwbase_post_schedule();
return 0;
}
diff --git a/kernel/locking/rwsem.c b/kernel/locking/rwsem.c
index 9eabd585ce7a..2340b6d90ec6 100644
--- a/kernel/locking/rwsem.c
+++ b/kernel/locking/rwsem.c
@@ -1427,8 +1427,14 @@ static inline void __downgrade_write(struct rw_semaphore *sem)
#define rwbase_signal_pending_state(state, current) \
signal_pending_state(state, current)
+#define rwbase_pre_schedule() \
+ rt_mutex_pre_schedule()
+
#define rwbase_schedule() \
- schedule()
+ rt_mutex_schedule()
+
+#define rwbase_post_schedule() \
+ rt_mutex_post_schedule()
#include "rwbase_rt.c"
diff --git a/kernel/locking/spinlock_rt.c b/kernel/locking/spinlock_rt.c
index 48a19ed8486d..842037b2ba54 100644
--- a/kernel/locking/spinlock_rt.c
+++ b/kernel/locking/spinlock_rt.c
@@ -184,9 +184,13 @@ static __always_inline int rwbase_rtmutex_trylock(struct rt_mutex_base *rtm)
#define rwbase_signal_pending_state(state, current) (0)
+#define rwbase_pre_schedule()
+
#define rwbase_schedule() \
schedule_rtlock()
+#define rwbase_post_schedule()
+
#include "rwbase_rt.c"
/*
* The common functions which get wrapped into the rwlock API.
--
2.45.2

66
buildroot-external/patches/linux/0006-locking-rtmutex-Add-a-lockdep-assert-to-catch-potent.patch
View File

@ -1,66 +0,0 @@
From 2356fd26aab66034283ab841530ee12d7f3c5a7b Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 8 Sep 2023 18:22:53 +0200
Subject: [PATCH 006/198] locking/rtmutex: Add a lockdep assert to catch
potential nested blocking
There used to be a BUG_ON(current->pi_blocked_on) in the lock acquisition
functions, but that vanished in one of the rtmutex overhauls.
Bring it back in form of a lockdep assert to catch code paths which take
rtmutex based locks with current::pi_blocked_on != NULL.
Reported-by: Crystal Wood <swood@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20230908162254.999499-7-bigeasy@linutronix.de
---
kernel/locking/rtmutex.c | 2 ++
kernel/locking/rwbase_rt.c | 2 ++
kernel/locking/spinlock_rt.c | 2 ++
3 files changed, 6 insertions(+)
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index a3fe05dfd0d8..4a10e8c16fd2 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -1784,6 +1784,8 @@ static int __sched rt_mutex_slowlock(struct rt_mutex_base *lock,
static __always_inline int __rt_mutex_lock(struct rt_mutex_base *lock,
unsigned int state)
{
+ lockdep_assert(!current->pi_blocked_on);
+
if (likely(rt_mutex_try_acquire(lock)))
return 0;
diff --git a/kernel/locking/rwbase_rt.c b/kernel/locking/rwbase_rt.c
index c7258cb32d91..34a59569db6b 100644
--- a/kernel/locking/rwbase_rt.c
+++ b/kernel/locking/rwbase_rt.c
@@ -133,6 +133,8 @@ static int __sched __rwbase_read_lock(struct rwbase_rt *rwb,
static __always_inline int rwbase_read_lock(struct rwbase_rt *rwb,
unsigned int state)
{
+ lockdep_assert(!current->pi_blocked_on);
+
if (rwbase_read_trylock(rwb))
return 0;
diff --git a/kernel/locking/spinlock_rt.c b/kernel/locking/spinlock_rt.c
index 842037b2ba54..38e292454fcc 100644
--- a/kernel/locking/spinlock_rt.c
+++ b/kernel/locking/spinlock_rt.c
@@ -37,6 +37,8 @@
static __always_inline void rtlock_lock(struct rt_mutex_base *rtm)
{
+ lockdep_assert(!current->pi_blocked_on);
+
if (unlikely(!rt_mutex_cmpxchg_acquire(rtm, NULL, current)))
rtlock_slowlock(rtm);
}
--
2.45.2

204
buildroot-external/patches/linux/0007-futex-pi-Fix-recursive-rt_mutex-waiter-state.patch
View File

@ -1,204 +0,0 @@
From 429cfb6a297e8d300a412a4a5d3d934d013d0fab Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 15 Sep 2023 17:19:44 +0200
Subject: [PATCH 007/198] futex/pi: Fix recursive rt_mutex waiter state
Some new assertions pointed out that the existing code has nested rt_mutex wait
state in the futex code.
Specifically, the futex_lock_pi() cancel case uses spin_lock() while there
still is a rt_waiter enqueued for this task, resulting in a state where there
are two waiters for the same task (and task_struct::pi_blocked_on gets
scrambled).
The reason to take hb->lock at this point is to avoid the wake_futex_pi()
EAGAIN case.
This happens when futex_top_waiter() and rt_mutex_top_waiter() state becomes
inconsistent. The current rules are such that this inconsistency will not be
observed.
Notably the case that needs to be avoided is where futex_lock_pi() and
futex_unlock_pi() interleave such that unlock will fail to observe a new
waiter.
*However* the case at hand is where a waiter is leaving, in this case the race
means a waiter that is going away is not observed -- which is harmless,
provided this race is explicitly handled.
This is a somewhat dangerous proposition because the converse race is not
observing a new waiter, which must absolutely not happen. But since the race is
valid this cannot be asserted.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lkml.kernel.org/r/20230915151943.GD6743@noisy.programming.kicks-ass.net
---
kernel/futex/pi.c | 76 ++++++++++++++++++++++++++----------------
kernel/futex/requeue.c | 6 ++--
2 files changed, 52 insertions(+), 30 deletions(-)
diff --git a/kernel/futex/pi.c b/kernel/futex/pi.c
index f8e65b27d9d6..d636a1bbd7d0 100644
--- a/kernel/futex/pi.c
+++ b/kernel/futex/pi.c
@@ -611,29 +611,16 @@ int futex_lock_pi_atomic(u32 __user *uaddr, struct futex_hash_bucket *hb,
/*
* Caller must hold a reference on @pi_state.
*/
-static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_pi_state *pi_state)
+static int wake_futex_pi(u32 __user *uaddr, u32 uval,
+ struct futex_pi_state *pi_state,
+ struct rt_mutex_waiter *top_waiter)
{
- struct rt_mutex_waiter *top_waiter;
struct task_struct *new_owner;
bool postunlock = false;
DEFINE_RT_WAKE_Q(wqh);
u32 curval, newval;
int ret = 0;
- top_waiter = rt_mutex_top_waiter(&pi_state->pi_mutex);
- if (WARN_ON_ONCE(!top_waiter)) {
- /*
- * As per the comment in futex_unlock_pi() this should not happen.
- *
- * When this happens, give up our locks and try again, giving
- * the futex_lock_pi() instance time to complete, either by
- * waiting on the rtmutex or removing itself from the futex
- * queue.
- */
- ret = -EAGAIN;
- goto out_unlock;
- }
-
new_owner = top_waiter->task;
/*
@@ -1046,19 +1033,33 @@ int futex_lock_pi(u32 __user *uaddr, unsigned int flags, ktime_t *time, int tryl
ret = rt_mutex_wait_proxy_lock(&q.pi_state->pi_mutex, to, &rt_waiter);
cleanup:
- spin_lock(q.lock_ptr);
/*
* If we failed to acquire the lock (deadlock/signal/timeout), we must
- * first acquire the hb->lock before removing the lock from the
- * rt_mutex waitqueue, such that we can keep the hb and rt_mutex wait
- * lists consistent.
+ * must unwind the above, however we canont lock hb->lock because
+ * rt_mutex already has a waiter enqueued and hb->lock can itself try
+ * and enqueue an rt_waiter through rtlock.
+ *
+ * Doing the cleanup without holding hb->lock can cause inconsistent
+ * state between hb and pi_state, but only in the direction of not
+ * seeing a waiter that is leaving.
+ *
+ * See futex_unlock_pi(), it deals with this inconsistency.
*
- * In particular; it is important that futex_unlock_pi() can not
- * observe this inconsistency.
+ * There be dragons here, since we must deal with the inconsistency on
+ * the way out (here), it is impossible to detect/warn about the race
+ * the other way around (missing an incoming waiter).
+ *
+ * What could possibly go wrong...
*/
if (ret && !rt_mutex_cleanup_proxy_lock(&q.pi_state->pi_mutex, &rt_waiter))
ret = 0;
+ /*
+ * Now that the rt_waiter has been dequeued, it is safe to use
+ * spinlock/rtlock (which might enqueue its own rt_waiter) and fix up
+ * the
+ */
+ spin_lock(q.lock_ptr);
/*
* Waiter is unqueued.
*/
@@ -1143,6 +1144,7 @@ int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
top_waiter = futex_top_waiter(hb, &key);
if (top_waiter) {
struct futex_pi_state *pi_state = top_waiter->pi_state;
+ struct rt_mutex_waiter *rt_waiter;
ret = -EINVAL;
if (!pi_state)
@@ -1155,22 +1157,39 @@ int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
if (pi_state->owner != current)
goto out_unlock;
- get_pi_state(pi_state);
/*
* By taking wait_lock while still holding hb->lock, we ensure
- * there is no point where we hold neither; and therefore
- * wake_futex_p() must observe a state consistent with what we
- * observed.
+ * there is no point where we hold neither; and thereby
+ * wake_futex_pi() must observe any new waiters.
+ *
+ * Since the cleanup: case in futex_lock_pi() removes the
+ * rt_waiter without holding hb->lock, it is possible for
+ * wake_futex_pi() to not find a waiter while the above does,
+ * in this case the waiter is on the way out and it can be
+ * ignored.
*
* In particular; this forces __rt_mutex_start_proxy() to
* complete such that we're guaranteed to observe the
- * rt_waiter. Also see the WARN in wake_futex_pi().
+ * rt_waiter.
*/
raw_spin_lock_irq(&pi_state->pi_mutex.wait_lock);
+
+ /*
+ * Futex vs rt_mutex waiter state -- if there are no rt_mutex
+ * waiters even though futex thinks there are, then the waiter
+ * is leaving and the uncontended path is safe to take.
+ */
+ rt_waiter = rt_mutex_top_waiter(&pi_state->pi_mutex);
+ if (!rt_waiter) {
+ raw_spin_unlock_irq(&pi_state->pi_mutex.wait_lock);
+ goto do_uncontended;
+ }
+
+ get_pi_state(pi_state);
spin_unlock(&hb->lock);
/* drops pi_state->pi_mutex.wait_lock */
- ret = wake_futex_pi(uaddr, uval, pi_state);
+ ret = wake_futex_pi(uaddr, uval, pi_state, rt_waiter);
put_pi_state(pi_state);
@@ -1198,6 +1217,7 @@ int futex_unlock_pi(u32 __user *uaddr, unsigned int flags)
return ret;
}
+do_uncontended:
/*
* We have no kernel internal state, i.e. no waiters in the
* kernel. Waiters which are about to queue themselves are stuck
diff --git a/kernel/futex/requeue.c b/kernel/futex/requeue.c
index cba8b1a6a4cc..4c73e0b81acc 100644
--- a/kernel/futex/requeue.c
+++ b/kernel/futex/requeue.c
@@ -850,11 +850,13 @@ int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags,
pi_mutex = &q.pi_state->pi_mutex;
ret = rt_mutex_wait_proxy_lock(pi_mutex, to, &rt_waiter);
- /* Current is not longer pi_blocked_on */
- spin_lock(q.lock_ptr);
+ /*
+ * See futex_unlock_pi()'s cleanup: comment.
+ */
if (ret && !rt_mutex_cleanup_proxy_lock(pi_mutex, &rt_waiter))
ret = 0;
+ spin_lock(q.lock_ptr);
debug_rt_mutex_free_waiter(&rt_waiter);
/*
* Fixup the pi_state owner and possibly acquire the lock if we
--
2.45.2

52
buildroot-external/patches/linux/0008-signal-Add-proper-comment-about-the-preempt-disable-.patch
View File

@ -1,52 +0,0 @@
From 83a0432f612bd7862f247f45744e99b45fc21389 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 3 Aug 2023 12:09:31 +0200
Subject: [PATCH 008/198] signal: Add proper comment about the preempt-disable
in ptrace_stop().
Commit 53da1d9456fe7 ("fix ptrace slowness") added a preempt-disable section
between read_unlock() and the following schedule() invocation without
explaining why it is needed.
Replace the comment with an explanation why this is needed. Clarify that
it is needed for correctness but for performance reasons.
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20230803100932.325870-2-bigeasy@linutronix.de
---
kernel/signal.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/kernel/signal.c b/kernel/signal.c
index 09019017d669..051ed8114cd4 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2329,10 +2329,21 @@ static int ptrace_stop(int exit_code, int why, unsigned long message,
do_notify_parent_cldstop(current, false, why);
/*
- * Don't want to allow preemption here, because
- * sys_ptrace() needs this task to be inactive.
+ * The previous do_notify_parent_cldstop() invocation woke ptracer.
+ * One a PREEMPTION kernel this can result in preemption requirement
+ * which will be fulfilled after read_unlock() and the ptracer will be
+ * put on the CPU.
+ * The ptracer is in wait_task_inactive(, __TASK_TRACED) waiting for
+ * this task wait in schedule(). If this task gets preempted then it
+ * remains enqueued on the runqueue. The ptracer will observe this and
+ * then sleep for a delay of one HZ tick. In the meantime this task
+ * gets scheduled, enters schedule() and will wait for the ptracer.
*
- * XXX: implement read_unlock_no_resched().
+ * This preemption point is not bad from correctness point of view but
+ * extends the runtime by one HZ tick time due to the ptracer's sleep.
+ * The preempt-disable section ensures that there will be no preemption
+ * between unlock and schedule() and so improving the performance since
+ * the ptracer has no reason to sleep.
*/
preempt_disable();
read_unlock(&tasklist_lock);
--
2.45.2

53
buildroot-external/patches/linux/0009-signal-Don-t-disable-preemption-in-ptrace_stop-on-PR.patch
View File

@ -1,53 +0,0 @@
From 2421d8ff790ecae09449cea9b62cf70af3b3d753 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 3 Aug 2023 12:09:32 +0200
Subject: [PATCH 009/198] signal: Don't disable preemption in ptrace_stop() on
PREEMPT_RT.
On PREEMPT_RT keeping preemption disabled during the invocation of
cgroup_enter_frozen() is a problem because the function acquires css_set_lock
which is a sleeping lock on PREEMPT_RT and must not be acquired with disabled
preemption.
The preempt-disabled section is only for performance optimisation
reasons and can be avoided.
Extend the comment and don't disable preemption before scheduling on
PREEMPT_RT.
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20230803100932.325870-3-bigeasy@linutronix.de
---
kernel/signal.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/kernel/signal.c b/kernel/signal.c
index 051ed8114cd4..b71026341056 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2344,11 +2344,20 @@ static int ptrace_stop(int exit_code, int why, unsigned long message,
* The preempt-disable section ensures that there will be no preemption
* between unlock and schedule() and so improving the performance since
* the ptracer has no reason to sleep.
+ *
+ * On PREEMPT_RT locking tasklist_lock does not disable preemption.
+ * Therefore the task can be preempted (after
+ * do_notify_parent_cldstop()) before unlocking tasklist_lock so there
+ * is no benefit in doing this. The optimisation is harmful on
+ * PEEMPT_RT because the spinlock_t (in cgroup_enter_frozen()) must not
+ * be acquired with disabled preemption.
*/
- preempt_disable();
+ if (!IS_ENABLED(CONFIG_PREEMPT_RT))
+ preempt_disable();
read_unlock(&tasklist_lock);
cgroup_enter_frozen();
- preempt_enable_no_resched();
+ if (!IS_ENABLED(CONFIG_PREEMPT_RT))
+ preempt_enable_no_resched();
schedule();
cgroup_leave_frozen(true);
--
2.45.2

91
buildroot-external/patches/linux/0010-drm-amd-display-Remove-migrate_en-dis-from-dc_fpu_be.patch
View File

@ -1,91 +0,0 @@
From d0206dbfadfde807099d9a22ec0ae36bb5bc5723 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 21 Sep 2023 16:15:12 +0200
Subject: [PATCH 010/198] drm/amd/display: Remove migrate_en/dis from
dc_fpu_begin().
This is a revert of the commit mentioned below while it is not wrong, as
in the kernel will explode, having migrate_disable() here it is
complete waste of resources.
Additionally commit message is plain wrong the review tag does not make
it any better. The migrate_disable() interface has a fat comment
describing it and it includes the word "undesired" in the headline which
should tickle people to read it before using it.
Initially I assumed it is worded too harsh but now I beg to differ.
The reviewer of the original commit, even not understanding what
migrate_disable() does should ask the following:
- migrate_disable() is added only to the CONFIG_X86 block and it claims
to protect fpu_recursion_depth. Why are the other the architectures
excluded?
- migrate_disable() is added after fpu_recursion_depth was modified.
Shouldn't it be added before the modification or referencing takes
place?
Moving on.
Disabling preemption DOES prevent CPU migration. A task, that can not be
pushed away from the CPU by the scheduler (due to disabled preemption)
can not be pushed or migrated to another CPU.
Disabling migration DOES NOT ensure consistency of per-CPU variables. It
only ensures that the task acts always on the same per-CPU variable. The
task remains preemptible meaning multiple tasks can access the same
per-CPU variable. This in turn leads to inconsistency for the statement
*pcpu -= 1;
with two tasks on one CPU and a preemption point during the RMW
operation:
Task A Task B
read pcpu to reg # 0
inc reg # 0 -> 1
read pcpu to reg # 0
inc reg # 0 -> 1
write reg to pcpu # 1
write reg to pcpu # 1
At the end pcpu reads 1 but should read 2 instead. Boom.
get_cpu_ptr() already contains a preempt_disable() statement. That means
that the per-CPU variable can only be referenced by a single task which
is currently running. The only inconsistency that can occur if the
variable is additionally accessed from an interrupt.
Remove migrate_disable/enable() from dc_fpu_begin/end().
Cc: Tianci Yin <tianci.yin@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Fixes: 0c316556d1249 ("drm/amd/display: Disable migration to ensure consistency of per-CPU variable")
Link: https://lore.kernel.org/r/20230921141516.520471-2-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
index 172aa10a8800..86f4c0e04654 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
@@ -91,7 +91,6 @@ void dc_fpu_begin(const char *function_name, const int line)
if (*pcpu == 1) {
#if defined(CONFIG_X86) || defined(CONFIG_LOONGARCH)
- migrate_disable();
kernel_fpu_begin();
#elif defined(CONFIG_PPC64)
if (cpu_has_feature(CPU_FTR_VSX_COMP)) {
@@ -132,7 +131,6 @@ void dc_fpu_end(const char *function_name, const int line)
if (*pcpu <= 0) {
#if defined(CONFIG_X86) || defined(CONFIG_LOONGARCH)
kernel_fpu_end();
- migrate_enable();
#elif defined(CONFIG_PPC64)
if (cpu_has_feature(CPU_FTR_VSX_COMP)) {
disable_kernel_vsx();
--
2.45.2

132
buildroot-external/patches/linux/0011-drm-amd-display-Simplify-the-per-CPU-usage.patch
View File

@ -1,132 +0,0 @@
From f6a59b0ee20dd0bdad7d7b18ab17f3be33bd9cda Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 21 Sep 2023 16:15:13 +0200
Subject: [PATCH 011/198] drm/amd/display: Simplify the per-CPU usage.
The fpu_recursion_depth counter is used to ensure that dc_fpu_begin()
can be invoked multiple times while the FPU-disable function itself is
only invoked once. Also the counter part (dc_fpu_end()) is ballanced
properly.
Instead of using the get_cpu_ptr() dance around the inc it is simpler to
increment the per-CPU variable directly. Also the per-CPU variable has
to be incremented and decremented on the same CPU. This is ensured by
the inner-part which disables preemption. This is kind of not obvious,
works and the preempt-counter is touched a few times for no reason.
Disable preemption before incrementing fpu_recursion_depth for the first
time. Keep preemption disabled until dc_fpu_end() where the counter is
decremented making it obvious that the preemption has to stay disabled
while the counter is non-zero.
Use simple inc/dec functions.
Remove the nested preempt_disable/enable functions which are now not
needed.
Link: https://lore.kernel.org/r/20230921141516.520471-3-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
.../gpu/drm/amd/display/amdgpu_dm/dc_fpu.c | 50 ++++++++-----------
1 file changed, 20 insertions(+), 30 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
index 86f4c0e04654..8bd5926b47e0 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
@@ -60,11 +60,9 @@ static DEFINE_PER_CPU(int, fpu_recursion_depth);
*/
inline void dc_assert_fp_enabled(void)
{
- int *pcpu, depth = 0;
+ int depth;
- pcpu = get_cpu_ptr(&fpu_recursion_depth);
- depth = *pcpu;
- put_cpu_ptr(&fpu_recursion_depth);
+ depth = __this_cpu_read(fpu_recursion_depth);
ASSERT(depth >= 1);
}
@@ -84,32 +82,27 @@ inline void dc_assert_fp_enabled(void)
*/
void dc_fpu_begin(const char *function_name, const int line)
{
- int *pcpu;
+ int depth;
- pcpu = get_cpu_ptr(&fpu_recursion_depth);
- *pcpu += 1;
+ preempt_disable();
+ depth = __this_cpu_inc_return(fpu_recursion_depth);
- if (*pcpu == 1) {
+ if (depth == 1) {
#if defined(CONFIG_X86) || defined(CONFIG_LOONGARCH)
kernel_fpu_begin();
#elif defined(CONFIG_PPC64)
- if (cpu_has_feature(CPU_FTR_VSX_COMP)) {
- preempt_disable();
+ if (cpu_has_feature(CPU_FTR_VSX_COMP))
enable_kernel_vsx();
- } else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) {
- preempt_disable();
+ else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP))
enable_kernel_altivec();
- } else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) {
- preempt_disable();
+ else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE))
enable_kernel_fp();
- }
#elif defined(CONFIG_ARM64)
kernel_neon_begin();
#endif
}
- TRACE_DCN_FPU(true, function_name, line, *pcpu);
- put_cpu_ptr(&fpu_recursion_depth);
+ TRACE_DCN_FPU(true, function_name, line, depth);
}
/**
@@ -124,29 +117,26 @@ void dc_fpu_begin(const char *function_name, const int line)
*/
void dc_fpu_end(const char *function_name, const int line)
{
- int *pcpu;
+ int depth;
- pcpu = get_cpu_ptr(&fpu_recursion_depth);
- *pcpu -= 1;
- if (*pcpu <= 0) {
+ depth = __this_cpu_dec_return(fpu_recursion_depth);
+ if (depth == 0) {
#if defined(CONFIG_X86) || defined(CONFIG_LOONGARCH)
kernel_fpu_end();
#elif defined(CONFIG_PPC64)
- if (cpu_has_feature(CPU_FTR_VSX_COMP)) {
+ if (cpu_has_feature(CPU_FTR_VSX_COMP))
disable_kernel_vsx();
- preempt_enable();
- } else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP)) {
+ else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP))
disable_kernel_altivec();
- preempt_enable();
- } else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE)) {
+ else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE))
disable_kernel_fp();
- preempt_enable();
- }
#elif defined(CONFIG_ARM64)
kernel_neon_end();
#endif
+ } else {
+ WARN_ON_ONCE(depth < 0);
}
- TRACE_DCN_FPU(false, function_name, line, *pcpu);
- put_cpu_ptr(&fpu_recursion_depth);
+ TRACE_DCN_FPU(false, function_name, line, depth);
+ preempt_enable();
}
--
2.45.2

31
buildroot-external/patches/linux/0012-drm-amd-display-Add-a-warning-if-the-FPU-is-used-out.patch
View File

@ -1,31 +0,0 @@
From ba79756a1205549b30c6665d992decfcbf02776f Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 21 Sep 2023 16:15:14 +0200
Subject: [PATCH 012/198] drm/amd/display: Add a warning if the FPU is used
outside from task context.
Add a warning if the FPU is used from any context other than task
context. This is only precaution since the code is not able to be used
from softirq while the API allows it on x86 for instance.
Link: https://lore.kernel.org/r/20230921141516.520471-4-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
index 8bd5926b47e0..4ae4720535a5 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/dc_fpu.c
@@ -84,6 +84,7 @@ void dc_fpu_begin(const char *function_name, const int line)
{
int depth;
+ WARN_ON_ONCE(!in_task());
preempt_disable();
depth = __this_cpu_inc_return(fpu_recursion_depth);
--
2.45.2

96
buildroot-external/patches/linux/0013-drm-amd-display-Move-the-memory-allocation-out-of-dc.patch
View File

@ -1,96 +0,0 @@
From 67e6407f9c6997124a48007e3c96c33ce7e9dbf9 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 21 Sep 2023 16:15:15 +0200
Subject: [PATCH 013/198] drm/amd/display: Move the memory allocation out of
dcn21_validate_bandwidth_fp().
dcn21_validate_bandwidth_fp() is invoked while FPU access has been
enabled. FPU access requires disabling preemption even on PREEMPT_RT.
It is not possible to allocate memory with disabled preemption even with
GFP_ATOMIC on PREEMPT_RT.
Move the memory allocation before FPU access is enabled.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217928
Link: https://lore.kernel.org/r/20230921141516.520471-5-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 10 +++++++++-
drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c | 7 ++-----
drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.h | 5 ++---
3 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
index d1a25fe6c44f..5674c3450fc3 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
@@ -953,9 +953,17 @@ static bool dcn21_validate_bandwidth(struct dc *dc, struct dc_state *context,
bool fast_validate)
{
bool voltage_supported;
+ display_e2e_pipe_params_st *pipes;
+
+ pipes = kcalloc(dc->res_pool->pipe_count, sizeof(display_e2e_pipe_params_st), GFP_KERNEL);
+ if (!pipes)
+ return false;
+
DC_FP_START();
- voltage_supported = dcn21_validate_bandwidth_fp(dc, context, fast_validate);
+ voltage_supported = dcn21_validate_bandwidth_fp(dc, context, fast_validate, pipes);
DC_FP_END();
+
+ kfree(pipes);
return voltage_supported;
}
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c
index 8a5a038fd855..89d4e969cfd8 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c
@@ -2311,9 +2311,8 @@ static void dcn21_calculate_wm(struct dc *dc, struct dc_state *context,
&context->bw_ctx.dml, pipes, pipe_cnt);
}
-bool dcn21_validate_bandwidth_fp(struct dc *dc,
- struct dc_state *context,
- bool fast_validate)
+bool dcn21_validate_bandwidth_fp(struct dc *dc, struct dc_state *context,
+ bool fast_validate, display_e2e_pipe_params_st *pipes)
{
bool out = false;
@@ -2322,7 +2321,6 @@ bool dcn21_validate_bandwidth_fp(struct dc *dc,
int vlevel = 0;
int pipe_split_from[MAX_PIPES];
int pipe_cnt = 0;
- display_e2e_pipe_params_st *pipes = kzalloc(dc->res_pool->pipe_count * sizeof(display_e2e_pipe_params_st), GFP_ATOMIC);
DC_LOGGER_INIT(dc->ctx->logger);
BW_VAL_TRACE_COUNT();
@@ -2362,7 +2360,6 @@ bool dcn21_validate_bandwidth_fp(struct dc *dc,
out = false;
validate_out:
- kfree(pipes);
BW_VAL_TRACE_FINISH();
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.h b/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.h
index c51badf7b68a..a81a0b9e6884 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.h
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.h
@@ -77,9 +77,8 @@ int dcn21_populate_dml_pipes_from_context(struct dc *dc,
struct dc_state *context,
display_e2e_pipe_params_st *pipes,
bool fast_validate);
-bool dcn21_validate_bandwidth_fp(struct dc *dc,
- struct dc_state *context,
- bool fast_validate);
+bool dcn21_validate_bandwidth_fp(struct dc *dc, struct dc_state *context, bool
+ fast_validate, display_e2e_pipe_params_st *pipes);
void dcn21_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_params);
void dcn21_clk_mgr_set_bw_params_wm_table(struct clk_bw_params *bw_params);
--
2.45.2

130
buildroot-external/patches/linux/0014-drm-amd-display-Move-the-memory-allocation-out-of-dc.patch
View File

@ -1,130 +0,0 @@
From 37cf46c4d2e7608b935b385c72f3ac0b0e1b49b3 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 21 Sep 2023 16:15:16 +0200
Subject: [PATCH 014/198] drm/amd/display: Move the memory allocation out of
dcn20_validate_bandwidth_fp().
dcn20_validate_bandwidth_fp() is invoked while FPU access has been
enabled. FPU access requires disabling preemption even on PREEMPT_RT.
It is not possible to allocate memory with disabled preemption even with
GFP_ATOMIC on PREEMPT_RT.
Move the memory allocation before FPU access is enabled.
To preserve previous "clean" state of "pipes" add a memset() before the
second invocation of dcn20_validate_bandwidth_internal() where the
variable is used.
Link: https://lore.kernel.org/r/20230921141516.520471-6-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
.../drm/amd/display/dc/dcn20/dcn20_resource.c | 10 +++++++++-
.../gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c | 16 +++++++---------
.../gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.h | 5 ++---
3 files changed, 18 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
index d587f807dfd7..5036a3e60832 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
@@ -2141,9 +2141,17 @@ bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context,
bool fast_validate)
{
bool voltage_supported;
+ display_e2e_pipe_params_st *pipes;
+
+ pipes = kcalloc(dc->res_pool->pipe_count, sizeof(display_e2e_pipe_params_st), GFP_KERNEL);
+ if (!pipes)
+ return false;
+
DC_FP_START();
- voltage_supported = dcn20_validate_bandwidth_fp(dc, context, fast_validate);
+ voltage_supported = dcn20_validate_bandwidth_fp(dc, context, fast_validate, pipes);
DC_FP_END();
+
+ kfree(pipes);
return voltage_supported;
}
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c
index 89d4e969cfd8..68970d6cf031 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c
@@ -2018,7 +2018,7 @@ void dcn20_patch_bounding_box(struct dc *dc, struct _vcs_dpi_soc_bounding_box_st
}
static bool dcn20_validate_bandwidth_internal(struct dc *dc, struct dc_state *context,
- bool fast_validate)
+ bool fast_validate, display_e2e_pipe_params_st *pipes)
{
bool out = false;
@@ -2027,7 +2027,6 @@ static bool dcn20_validate_bandwidth_internal(struct dc *dc, struct dc_state *co
int vlevel = 0;
int pipe_split_from[MAX_PIPES];
int pipe_cnt = 0;
- display_e2e_pipe_params_st *pipes = kzalloc(dc->res_pool->pipe_count * sizeof(display_e2e_pipe_params_st), GFP_ATOMIC);
DC_LOGGER_INIT(dc->ctx->logger);
BW_VAL_TRACE_COUNT();
@@ -2062,16 +2061,14 @@ static bool dcn20_validate_bandwidth_internal(struct dc *dc, struct dc_state *co
out = false;
validate_out:
- kfree(pipes);
BW_VAL_TRACE_FINISH();
return out;
}
-bool dcn20_validate_bandwidth_fp(struct dc *dc,
- struct dc_state *context,
- bool fast_validate)
+bool dcn20_validate_bandwidth_fp(struct dc *dc, struct dc_state *context,
+ bool fast_validate, display_e2e_pipe_params_st *pipes)
{
bool voltage_supported = false;
bool full_pstate_supported = false;
@@ -2090,11 +2087,11 @@ bool dcn20_validate_bandwidth_fp(struct dc *dc,
ASSERT(context != dc->current_state);
if (fast_validate) {
- return dcn20_validate_bandwidth_internal(dc, context, true);
+ return dcn20_validate_bandwidth_internal(dc, context, true, pipes);
}
// Best case, we support full UCLK switch latency
- voltage_supported = dcn20_validate_bandwidth_internal(dc, context, false);
+ voltage_supported = dcn20_validate_bandwidth_internal(dc, context, false, pipes);
full_pstate_supported = context->bw_ctx.bw.dcn.clk.p_state_change_support;
if (context->bw_ctx.dml.soc.dummy_pstate_latency_us == 0 ||
@@ -2106,7 +2103,8 @@ bool dcn20_validate_bandwidth_fp(struct dc *dc,
// Fallback: Try to only support G6 temperature read latency
context->bw_ctx.dml.soc.dram_clock_change_latency_us = context->bw_ctx.dml.soc.dummy_pstate_latency_us;
- voltage_supported = dcn20_validate_bandwidth_internal(dc, context, false);
+ memset(pipes, 0, dc->res_pool->pipe_count * sizeof(display_e2e_pipe_params_st));
+ voltage_supported = dcn20_validate_bandwidth_internal(dc, context, false, pipes);
dummy_pstate_supported = context->bw_ctx.bw.dcn.clk.p_state_change_support;
if (voltage_supported && (dummy_pstate_supported || !(context->stream_count))) {
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.h b/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.h
index a81a0b9e6884..b6c34198ddc8 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.h
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.h
@@ -61,9 +61,8 @@ void dcn20_update_bounding_box(struct dc *dc,
unsigned int num_states);
void dcn20_patch_bounding_box(struct dc *dc,
struct _vcs_dpi_soc_bounding_box_st *bb);
-bool dcn20_validate_bandwidth_fp(struct dc *dc,
- struct dc_state *context,
- bool fast_validate);
+bool dcn20_validate_bandwidth_fp(struct dc *dc, struct dc_state *context,
+ bool fast_validate, display_e2e_pipe_params_st *pipes);
void dcn20_fpu_set_wm_ranges(int i,
struct pp_smu_wm_range_sets *ranges,
struct _vcs_dpi_soc_bounding_box_st *loaded_bb);
--
2.45.2

128
buildroot-external/patches/linux/0015-net-Avoid-the-IPI-to-free-the.patch
View File

@ -1,128 +0,0 @@
From daeb0f4347ce368ec32c91555086812f9c0dfdec Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Mon, 15 Aug 2022 17:29:50 +0200
Subject: [PATCH 015/198] net: Avoid the IPI to free the
skb_attempt_defer_free() collects a skbs, which was allocated on a
remote CPU, on a per-CPU list. These skbs are either freed on that
remote CPU once the CPU enters NET_RX or an remote IPI function is
invoked in to raise the NET_RX softirq if a threshold of pending skb has
been exceeded.
This remote IPI can cause the wakeup of ksoftirqd on PREEMPT_RT if the
remote CPU idle was idle. This is undesired because once the ksoftirqd
is running it will acquire all pending softirqs and they will not be
executed as part of the threaded interrupt until ksoftird goes idle
again.
To void all this, schedule the deferred clean up from a worker.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
include/linux/netdevice.h | 4 ++++
net/core/dev.c | 39 ++++++++++++++++++++++++++++++---------
net/core/skbuff.c | 7 ++++++-
3 files changed, 40 insertions(+), 10 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index b8e60a20416b..ffa5248a90e2 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3258,7 +3258,11 @@ struct softnet_data {
int defer_count;
int defer_ipi_scheduled;
struct sk_buff *defer_list;
+#ifndef CONFIG_PREEMPT_RT
call_single_data_t defer_csd;
+#else
+ struct work_struct defer_work;
+#endif
};
static inline void input_queue_head_incr(struct softnet_data *sd)
diff --git a/net/core/dev.c b/net/core/dev.c
index 5a5bd339f11e..8f193d7b8b41 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4705,15 +4705,6 @@ static void rps_trigger_softirq(void *data)
#endif /* CONFIG_RPS */
-/* Called from hardirq (IPI) context */
-static void trigger_rx_softirq(void *data)
-{
- struct softnet_data *sd = data;
-
- __raise_softirq_irqoff(NET_RX_SOFTIRQ);
- smp_store_release(&sd->defer_ipi_scheduled, 0);
-}
-
/*
* After we queued a packet into sd->input_pkt_queue,
* we need to make sure this queue is serviced soon.
@@ -6682,6 +6673,32 @@ static void skb_defer_free_flush(struct softnet_data *sd)
}
}
+#ifndef CONFIG_PREEMPT_RT
+
+/* Called from hardirq (IPI) context */
+static void trigger_rx_softirq(void *data)
+{
+ struct softnet_data *sd = data;
+
+ __raise_softirq_irqoff(NET_RX_SOFTIRQ);
+ smp_store_release(&sd->defer_ipi_scheduled, 0);
+}
+
+#else
+
+static void trigger_rx_softirq(struct work_struct *defer_work)
+{
+ struct softnet_data *sd;
+
+ sd = container_of(defer_work, struct softnet_data, defer_work);
+ smp_store_release(&sd->defer_ipi_scheduled, 0);
+ local_bh_disable();
+ skb_defer_free_flush(sd);
+ local_bh_enable();
+}
+
+#endif
+
static int napi_threaded_poll(void *data)
{
struct napi_struct *napi = data;
@@ -11619,7 +11636,11 @@ static int __init net_dev_init(void)
INIT_CSD(&sd->csd, rps_trigger_softirq, sd);
sd->cpu = i;
#endif
+#ifndef CONFIG_PREEMPT_RT
INIT_CSD(&sd->defer_csd, trigger_rx_softirq, sd);
+#else
+ INIT_WORK(&sd->defer_work, trigger_rx_softirq);
+#endif
spin_lock_init(&sd->defer_lock);
init_gro_hash(&sd->backlog);
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index f0a9ef1aeaa2..682175af439d 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -6863,8 +6863,13 @@ nodefer: __kfree_skb(skb);
/* Make sure to trigger NET_RX_SOFTIRQ on the remote CPU
* if we are unlucky enough (this seems very unlikely).
*/
- if (unlikely(kick) && !cmpxchg(&sd->defer_ipi_scheduled, 0, 1))
+ if (unlikely(kick) && !cmpxchg(&sd->defer_ipi_scheduled, 0, 1)) {
+#ifndef CONFIG_PREEMPT_RT
smp_call_function_single_async(cpu, &sd->defer_csd);
+#else
+ schedule_work_on(cpu, &sd->defer_work);
+#endif
+ }
}
static void skb_splice_csum_page(struct sk_buff *skb, struct page *page,
--
2.45.2

28
buildroot-external/patches/linux/0016-x86-Allow-to-enable-RT.patch
View File

@ -1,28 +0,0 @@
From 36e07023ee977202464b7cca7776c65d13438b3e Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 7 Aug 2019 18:15:38 +0200
Subject: [PATCH 016/198] x86: Allow to enable RT
Allow to select RT.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 82d12c93feab..231e41817ea4 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -28,6 +28,7 @@ config X86_64
select ARCH_HAS_GIGANTIC_PAGE
select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
select ARCH_SUPPORTS_PER_VMA_LOCK
+ select ARCH_SUPPORTS_RT
select ARCH_USE_CMPXCHG_LOCKREF
select HAVE_ARCH_SOFT_DIRTY
select MODULES_USE_ELF_RELA
--
2.45.2

34
buildroot-external/patches/linux/0017-x86-Enable-RT-also-on-32bit.patch
View File

@ -1,34 +0,0 @@
From 93aef157c9d68e19c1d6a99b6f678affdc73f8e7 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Thu, 7 Nov 2019 17:49:20 +0100
Subject: [PATCH 017/198] x86: Enable RT also on 32bit
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 231e41817ea4..fe340c07ddbf 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -28,7 +28,6 @@ config X86_64
select ARCH_HAS_GIGANTIC_PAGE
select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
select ARCH_SUPPORTS_PER_VMA_LOCK
- select ARCH_SUPPORTS_RT
select ARCH_USE_CMPXCHG_LOCKREF
select HAVE_ARCH_SOFT_DIRTY
select MODULES_USE_ELF_RELA
@@ -119,6 +118,7 @@ config X86
select ARCH_USES_CFI_TRAPS if X86_64 && CFI_CLANG
select ARCH_SUPPORTS_LTO_CLANG
select ARCH_SUPPORTS_LTO_CLANG_THIN
+ select ARCH_SUPPORTS_RT
select ARCH_USE_BUILTIN_BSWAP
select ARCH_USE_MEMTEST
select ARCH_USE_QUEUED_RWLOCKS
--
2.45.2

63
buildroot-external/patches/linux/0018-sched-rt-Don-t-try-push-tasks-if-there-are-none.patch
View File

@ -1,63 +0,0 @@
From c639d81618cd94807497a50eb607fb8e41342063 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 1 Aug 2023 17:26:48 +0200
Subject: [PATCH 018/198] sched/rt: Don't try push tasks if there are none.
I have a RT task X at a high priority and cyclictest on each CPU with
lower priority than X's. If X is active and each CPU wakes their own
cylictest thread then it ends in a longer rto_push storm.
A random CPU determines via balance_rt() that the CPU on which X is
running needs to push tasks. X has the highest priority, cyclictest is
next in line so there is nothing that can be done since the task with
the higher priority is not touched.
tell_cpu_to_push() increments rto_loop_next and schedules
rto_push_irq_work_func() on X's CPU. The other CPUs also increment the
loop counter and do the same. Once rto_push_irq_work_func() is active it
does nothing because it has _no_ pushable tasks on its runqueue. Then
checks rto_next_cpu() and decides to queue irq_work on the local CPU
because another CPU requested a push by incrementing the counter.
I have traces where ~30 CPUs request this ~3 times each before it
finally ends. This greatly increases X's runtime while X isn't making
much progress.
Teach rto_next_cpu() to only return CPUs which also have tasks on their
runqueue which can be pushed away. This does not reduce the
tell_cpu_to_push() invocations (rto_loop_next counter increments) but
reduces the amount of issued rto_push_irq_work_func() if nothing can be
done. As the result the overloaded CPU is blocked less often.
There are still cases where the "same job" is repeated several times
(for instance the current CPU needs to resched but didn't yet because
the irq-work is repeated a few times and so the old task remains on the
CPU) but the majority of request end in tell_cpu_to_push() before an IPI
is issued.
Reviewed-by: "Steven Rostedt (Google)" <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20230801152648._y603AS_@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
kernel/sched/rt.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 4ac36eb4cdee..acd1510e8d47 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -2253,8 +2253,11 @@ static int rto_next_cpu(struct root_domain *rd)
rd->rto_cpu = cpu;
- if (cpu < nr_cpu_ids)
+ if (cpu < nr_cpu_ids) {
+ if (!has_pushable_tasks(cpu_rq(cpu)))
+ continue;
return cpu;
+ }
rd->rto_cpu = -1;
--
2.45.2

233
buildroot-external/patches/linux/0019-softirq-Use-a-dedicated-thread-for-timer-wakeups.patch
View File

@ -1,233 +0,0 @@
From 2fd122683d6787e2f9b5f396c2729e3fbcdbf447 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 1 Dec 2021 17:41:09 +0100
Subject: [PATCH 019/198] softirq: Use a dedicated thread for timer wakeups.
A timer/hrtimer softirq is raised in-IRQ context. With threaded
interrupts enabled or on PREEMPT_RT this leads to waking the ksoftirqd
for the processing of the softirq.
Once the ksoftirqd is marked as pending (or is running) it will collect
all raised softirqs. This in turn means that a softirq which would have
been processed at the end of the threaded interrupt, which runs at an
elevated priority, is now moved to ksoftirqd which runs at SCHED_OTHER
priority and competes with every regular task for CPU resources.
This introduces long delays on heavy loaded systems and is not desired
especially if the system is not overloaded by the softirqs.
Split the TIMER_SOFTIRQ and HRTIMER_SOFTIRQ processing into a dedicated
timers thread and let it run at the lowest SCHED_FIFO priority.
RT tasks are are woken up from hardirq context so only timer_list timers
and hrtimers for "regular" tasks are processed here. The higher priority
ensures that wakeups are performed before scheduling SCHED_OTHER tasks.
Using a dedicated variable to store the pending softirq bits values
ensure that the timer are not accidentally picked up by ksoftirqd and
other threaded interrupts.
It shouldn't be picked up by ksoftirqd since it runs at lower priority.
However if the timer bits are ORed while a threaded interrupt is
running, then the timer softirq would be performed at higher priority.
The new timer thread will block on the softirq lock before it starts
softirq work. This "race window" isn't closed because while timer thread
is performing the softirq it can get PI-boosted via the softirq lock by
a random force-threaded thread.
The timer thread can pick up pending softirqs from ksoftirqd but only
if the softirq load is high. It is not be desired that the picked up
softirqs are processed at SCHED_FIFO priority under high softirq load
but this can already happen by a PI-boost by a force-threaded interrupt.
Reported-by: kernel test robot <lkp@intel.com> [ static timer_threads ]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
include/linux/interrupt.h | 16 +++++++
kernel/softirq.c | 92 +++++++++++++++++++++++++++++++++++++--
kernel/time/hrtimer.c | 4 +-
kernel/time/timer.c | 2 +-
4 files changed, 108 insertions(+), 6 deletions(-)
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 4a1dc88ddbff..0efba74a835c 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -609,6 +609,22 @@ extern void __raise_softirq_irqoff(unsigned int nr);
extern void raise_softirq_irqoff(unsigned int nr);
extern void raise_softirq(unsigned int nr);
+#ifdef CONFIG_PREEMPT_RT
+extern void raise_timer_softirq(void);
+extern void raise_hrtimer_softirq(void);
+
+#else
+static inline void raise_timer_softirq(void)
+{
+ raise_softirq(TIMER_SOFTIRQ);
+}
+
+static inline void raise_hrtimer_softirq(void)
+{
+ raise_softirq_irqoff(HRTIMER_SOFTIRQ);
+}
+#endif
+
DECLARE_PER_CPU(struct task_struct *, ksoftirqd);
static inline struct task_struct *this_cpu_ksoftirqd(void)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index bd9716d7bb63..0e43058c2e58 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -623,6 +623,29 @@ static inline void tick_irq_exit(void)
#endif
}
+#ifdef CONFIG_PREEMPT_RT
+static DEFINE_PER_CPU(struct task_struct *, timersd);
+static DEFINE_PER_CPU(unsigned long, pending_timer_softirq);
+
+static unsigned int local_pending_timers(void)
+{
+ return __this_cpu_read(pending_timer_softirq);
+}
+
+static void wake_timersd(void)
+{
+ struct task_struct *tsk = __this_cpu_read(timersd);
+
+ if (tsk)
+ wake_up_process(tsk);
+}
+
+#else
+
+static inline void wake_timersd(void) { }
+
+#endif
+
static inline void __irq_exit_rcu(void)
{
#ifndef __ARCH_IRQ_EXIT_IRQS_DISABLED
@@ -632,8 +655,13 @@ static inline void __irq_exit_rcu(void)
#endif
account_hardirq_exit(current);
preempt_count_sub(HARDIRQ_OFFSET);
- if (!in_interrupt() && local_softirq_pending())
- invoke_softirq();
+ if (!in_interrupt()) {
+ if (local_softirq_pending())
+ invoke_softirq();
+
+ if (IS_ENABLED(CONFIG_PREEMPT_RT) && local_pending_timers())
+ wake_timersd();
+ }
tick_irq_exit();
}
@@ -967,12 +995,70 @@ static struct smp_hotplug_thread softirq_threads = {
.thread_comm = "ksoftirqd/%u",
};
+#ifdef CONFIG_PREEMPT_RT
+static void timersd_setup(unsigned int cpu)
+{
+ sched_set_fifo_low(current);
+}
+
+static int timersd_should_run(unsigned int cpu)
+{
+ return local_pending_timers();
+}
+
+static void run_timersd(unsigned int cpu)
+{
+ unsigned int timer_si;
+
+ ksoftirqd_run_begin();
+
+ timer_si = local_pending_timers();
+ __this_cpu_write(pending_timer_softirq, 0);
+ or_softirq_pending(timer_si);
+
+ __do_softirq();
+
+ ksoftirqd_run_end();
+}
+
+static void raise_ktimers_thread(unsigned int nr)
+{
+ trace_softirq_raise(nr);
+ __this_cpu_or(pending_timer_softirq, 1 << nr);
+}
+
+void raise_hrtimer_softirq(void)
+{
+ raise_ktimers_thread(HRTIMER_SOFTIRQ);
+}
+
+void raise_timer_softirq(void)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ raise_ktimers_thread(TIMER_SOFTIRQ);
+ wake_timersd();
+ local_irq_restore(flags);
+}
+
+static struct smp_hotplug_thread timer_threads = {
+ .store = &timersd,
+ .setup = timersd_setup,
+ .thread_should_run = timersd_should_run,
+ .thread_fn = run_timersd,
+ .thread_comm = "ktimers/%u",
+};
+#endif
+
static __init int spawn_ksoftirqd(void)
{
cpuhp_setup_state_nocalls(CPUHP_SOFTIRQ_DEAD, "softirq:dead", NULL,
takeover_tasklets);
BUG_ON(smpboot_register_percpu_thread(&softirq_threads));
-
+#ifdef CONFIG_PREEMPT_RT
+ BUG_ON(smpboot_register_percpu_thread(&timer_threads));
+#endif
return 0;
}
early_initcall(spawn_ksoftirqd);
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index edb0f821dcea..a7290012179a 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -1809,7 +1809,7 @@ void hrtimer_interrupt(struct clock_event_device *dev)
if (!ktime_before(now, cpu_base->softirq_expires_next)) {
cpu_base->softirq_expires_next = KTIME_MAX;
cpu_base->softirq_activated = 1;
- raise_softirq_irqoff(HRTIMER_SOFTIRQ);
+ raise_hrtimer_softirq();
}
__hrtimer_run_queues(cpu_base, now, flags, HRTIMER_ACTIVE_HARD);
@@ -1922,7 +1922,7 @@ void hrtimer_run_queues(void)
if (!ktime_before(now, cpu_base->softirq_expires_next)) {
cpu_base->softirq_expires_next = KTIME_MAX;
cpu_base->softirq_activated = 1;
- raise_softirq_irqoff(HRTIMER_SOFTIRQ);
+ raise_hrtimer_softirq();
}
__hrtimer_run_queues(cpu_base, now, flags, HRTIMER_ACTIVE_HARD);
diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 63a8ce7177dd..7cad6fe3c035 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -2054,7 +2054,7 @@ static void run_local_timers(void)
if (time_before(jiffies, base->next_expiry))
return;
}
- raise_softirq(TIMER_SOFTIRQ);
+ raise_timer_softirq();
}
/*
--
2.45.2

80
buildroot-external/patches/linux/0020-rcutorture-Also-force-sched-priority-to-timersd-on-b.patch
View File

@ -1,80 +0,0 @@
From f178d0e863ed7025a9350cbb950281e400fcaa16 Mon Sep 17 00:00:00 2001
From: Frederic Weisbecker <frederic@kernel.org>
Date: Tue, 5 Apr 2022 03:07:51 +0200
Subject: [PATCH 020/198] rcutorture: Also force sched priority to timersd on
boosting test.
ksoftirqd is statically boosted to the priority level right above the
one of rcu_torture_boost() so that timers, which torture readers rely on,
get a chance to run while rcu_torture_boost() is polling.
However timers processing got split from ksoftirqd into their own kthread
(timersd) that isn't boosted. It has the same SCHED_FIFO low prio as
rcu_torture_boost() and therefore timers can't preempt it and may
starve.
The issue can be triggered in practice on v5.17.1-rt17 using:
./kvm.sh --allcpus --configs TREE04 --duration 10m --kconfig "CONFIG_EXPERT=y CONFIG_PREEMPT_RT=y"
Fix this with statically boosting timersd just like is done with
ksoftirqd in commit
ea6d962e80b61 ("rcutorture: Judge RCU priority boosting on grace periods, not callbacks")
Suggested-by: Mel Gorman <mgorman@suse.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lkml.kernel.org/r/20220405010752.1347437-1-frederic@kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
include/linux/interrupt.h | 1 +
kernel/rcu/rcutorture.c | 6 ++++++
kernel/softirq.c | 2 +-
3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 0efba74a835c..f459b0f27c94 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -610,6 +610,7 @@ extern void raise_softirq_irqoff(unsigned int nr);
extern void raise_softirq(unsigned int nr);
#ifdef CONFIG_PREEMPT_RT
+DECLARE_PER_CPU(struct task_struct *, timersd);
extern void raise_timer_softirq(void);
extern void raise_hrtimer_softirq(void);
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 781146600aa4..7ee1c84b52ee 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -2409,6 +2409,12 @@ static int rcutorture_booster_init(unsigned int cpu)
WARN_ON_ONCE(!t);
sp.sched_priority = 2;
sched_setscheduler_nocheck(t, SCHED_FIFO, &sp);
+#ifdef CONFIG_PREEMPT_RT
+ t = per_cpu(timersd, cpu);
+ WARN_ON_ONCE(!t);
+ sp.sched_priority = 2;
+ sched_setscheduler_nocheck(t, SCHED_FIFO, &sp);
+#endif
}
/* Don't allow time recalculation while creating a new task. */
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 0e43058c2e58..63e8b9ad2727 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -624,7 +624,7 @@ static inline void tick_irq_exit(void)
}
#ifdef CONFIG_PREEMPT_RT
-static DEFINE_PER_CPU(struct task_struct *, timersd);
+DEFINE_PER_CPU(struct task_struct *, timersd);
static DEFINE_PER_CPU(unsigned long, pending_timer_softirq);
static unsigned int local_pending_timers(void)
--
2.45.2

115
buildroot-external/patches/linux/0021-tick-Fix-timer-storm-since-introduction-of-timersd.patch
View File

@ -1,115 +0,0 @@
From ac5d5969eb361ddc449872de0b7da375aac43810 Mon Sep 17 00:00:00 2001
From: Frederic Weisbecker <frederic@kernel.org>
Date: Tue, 5 Apr 2022 03:07:52 +0200
Subject: [PATCH 021/198] tick: Fix timer storm since introduction of timersd
If timers are pending while the tick is reprogrammed on nohz_mode, the
next expiry is not armed to fire now, it is delayed one jiffy forward
instead so as not to raise an inextinguishable timer storm with such
scenario:
1) IRQ triggers and queue a timer
2) ksoftirqd() is woken up
3) IRQ tail: timer is reprogrammed to fire now
4) IRQ exit
5) TIMER interrupt
6) goto 3)
...all that until we finally reach ksoftirqd.
Unfortunately we are checking the wrong softirq vector bitmask since
timersd kthread has split from ksoftirqd. Timers now have their own
vector state field that must be checked separately. As a result, the
old timer storm is back. This shows up early on boot with extremely long
initcalls:
[ 333.004807] initcall dquot_init+0x0/0x111 returned 0 after 323822879 usecs
and the cause is uncovered with the right trace events showing just
10 microseconds between ticks (~100 000 Hz):
|swapper/-1 1dn.h111 60818582us : hrtimer_expire_entry: hrtimer=00000000e0ef0f6b function=tick_sched_timer now=60415486608
|swapper/-1 1dn.h111 60818592us : hrtimer_expire_entry: hrtimer=00000000e0ef0f6b function=tick_sched_timer now=60415496082
|swapper/-1 1dn.h111 60818601us : hrtimer_expire_entry: hrtimer=00000000e0ef0f6b function=tick_sched_timer now=60415505550
Fix this by checking the right timer vector state from the nohz code.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lkml.kernel.org/r/20220405010752.1347437-2-frederic@kernel.org
---
include/linux/interrupt.h | 12 ++++++++++++
kernel/softirq.c | 7 +------
kernel/time/tick-sched.c | 2 +-
3 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index f459b0f27c94..a5091ac97fc6 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -611,9 +611,16 @@ extern void raise_softirq(unsigned int nr);
#ifdef CONFIG_PREEMPT_RT
DECLARE_PER_CPU(struct task_struct *, timersd);
+DECLARE_PER_CPU(unsigned long, pending_timer_softirq);
+
extern void raise_timer_softirq(void);
extern void raise_hrtimer_softirq(void);
+static inline unsigned int local_pending_timers(void)
+{
+ return __this_cpu_read(pending_timer_softirq);
+}
+
#else
static inline void raise_timer_softirq(void)
{
@@ -624,6 +631,11 @@ static inline void raise_hrtimer_softirq(void)
{
raise_softirq_irqoff(HRTIMER_SOFTIRQ);
}
+
+static inline unsigned int local_pending_timers(void)
+{
+ return local_softirq_pending();
+}
#endif
DECLARE_PER_CPU(struct task_struct *, ksoftirqd);
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 63e8b9ad2727..65477d8e00af 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -625,12 +625,7 @@ static inline void tick_irq_exit(void)
#ifdef CONFIG_PREEMPT_RT
DEFINE_PER_CPU(struct task_struct *, timersd);
-static DEFINE_PER_CPU(unsigned long, pending_timer_softirq);
-
-static unsigned int local_pending_timers(void)
-{
- return __this_cpu_read(pending_timer_softirq);
-}
+DEFINE_PER_CPU(unsigned long, pending_timer_softirq);
static void wake_timersd(void)
{
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 55cbc49f70d1..1a0ed106b192 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -795,7 +795,7 @@ static void tick_nohz_restart(struct tick_sched *ts, ktime_t now)
static inline bool local_timer_softirq_pending(void)
{
- return local_softirq_pending() & BIT(TIMER_SOFTIRQ);
+ return local_pending_timers() & BIT(TIMER_SOFTIRQ);
}
static ktime_t tick_nohz_next_event(struct tick_sched *ts, int cpu)
--
2.45.2

49
buildroot-external/patches/linux/0022-softirq-Wake-ktimers-thread-also-in-softirq.patch
View File

@ -1,49 +0,0 @@
From fde74c1d2ebdc73a1eb37bbf1e10bc9741e6c6f7 Mon Sep 17 00:00:00 2001
From: Junxiao Chang <junxiao.chang@intel.com>
Date: Mon, 20 Feb 2023 09:12:20 +0100
Subject: [PATCH 022/198] softirq: Wake ktimers thread also in softirq.
If the hrtimer is raised while a softirq is processed then it does not
wake the corresponding ktimers thread. This is due to the optimisation in the
irq-exit path which is also used to wake the ktimers thread. For the other
softirqs, this is okay because the additional softirq bits will be handled by
the currently running softirq handler.
The timer related softirq bits are added to a different variable and rely on
the ktimers thread.
As a consuequence the wake up of ktimersd is delayed until the next timer tick.
Always wake the ktimers thread if a timer related softirq is pending.
Reported-by: Peh, Hock Zhang <hock.zhang.peh@intel.com>
Signed-off-by: Junxiao Chang <junxiao.chang@intel.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
kernel/softirq.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 65477d8e00af..ea6198bf64e0 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -650,13 +650,12 @@ static inline void __irq_exit_rcu(void)
#endif
account_hardirq_exit(current);
preempt_count_sub(HARDIRQ_OFFSET);
- if (!in_interrupt()) {
- if (local_softirq_pending())
- invoke_softirq();
+ if (!in_interrupt() && local_softirq_pending())
+ invoke_softirq();
- if (IS_ENABLED(CONFIG_PREEMPT_RT) && local_pending_timers())
- wake_timersd();
- }
+ if (IS_ENABLED(CONFIG_PREEMPT_RT) && local_pending_timers() &&
+ !(in_nmi() | in_hardirq()))
+ wake_timersd();
tick_irq_exit();
}
--
2.45.2

102
buildroot-external/patches/linux/0023-zram-Replace-bit-spinlocks-with-spinlock_t-for-PREEM.patch
View File

@ -1,102 +0,0 @@
From 7901a04965c7c34d6891b5eb127b8e46af1af9bf Mon Sep 17 00:00:00 2001
From: Mike Galbraith <umgwanakikbuti@gmail.com>
Date: Thu, 31 Mar 2016 04:08:28 +0200
Subject: [PATCH 023/198] zram: Replace bit spinlocks with spinlock_t for
PREEMPT_RT.
The bit spinlock disables preemption. The spinlock_t lock becomes a sleeping
lock on PREEMPT_RT and it can not be acquired in this context. In this locked
section, zs_free() acquires a zs_pool::lock, and there is access to
zram::wb_limit_lock.
Use a spinlock_t on PREEMPT_RT for locking and set/ clear ZRAM_LOCK bit after
the lock has been acquired/ dropped.
Signed-off-by: Mike Galbraith <umgwanakikbuti@gmail.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lkml.kernel.org/r/YqIbMuHCPiQk+Ac2@linutronix.de
Link: https://lore.kernel.org/20230323161830.jFbWCosd@linutronix.de
---
drivers/block/zram/zram_drv.c | 37 +++++++++++++++++++++++++++++++++++
drivers/block/zram/zram_drv.h | 3 +++
2 files changed, 40 insertions(+)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 06673c6ca255..a5d0f7c06342 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -57,6 +57,41 @@ static void zram_free_page(struct zram *zram, size_t index);
static int zram_read_page(struct zram *zram, struct page *page, u32 index,
struct bio *parent);
+#ifdef CONFIG_PREEMPT_RT
+static void zram_meta_init_table_locks(struct zram *zram, size_t num_pages)
+{
+ size_t index;
+
+ for (index = 0; index < num_pages; index++)
+ spin_lock_init(&zram->table[index].lock);
+}
+
+static int zram_slot_trylock(struct zram *zram, u32 index)
+{
+ int ret;
+
+ ret = spin_trylock(&zram->table[index].lock);
+ if (ret)
+ __set_bit(ZRAM_LOCK, &zram->table[index].flags);
+ return ret;
+}
+
+static void zram_slot_lock(struct zram *zram, u32 index)
+{
+ spin_lock(&zram->table[index].lock);
+ __set_bit(ZRAM_LOCK, &zram->table[index].flags);
+}
+
+static void zram_slot_unlock(struct zram *zram, u32 index)
+{
+ __clear_bit(ZRAM_LOCK, &zram->table[index].flags);
+ spin_unlock(&zram->table[index].lock);
+}
+
+#else
+
+static void zram_meta_init_table_locks(struct zram *zram, size_t num_pages) { }
+
static int zram_slot_trylock(struct zram *zram, u32 index)
{
return bit_spin_trylock(ZRAM_LOCK, &zram->table[index].flags);
@@ -71,6 +106,7 @@ static void zram_slot_unlock(struct zram *zram, u32 index)
{
bit_spin_unlock(ZRAM_LOCK, &zram->table[index].flags);
}
+#endif
static inline bool init_done(struct zram *zram)
{
@@ -1245,6 +1281,7 @@ static bool zram_meta_alloc(struct zram *zram, u64 disksize)
if (!huge_class_size)
huge_class_size = zs_huge_class_size(zram->mem_pool);
+ zram_meta_init_table_locks(zram, num_pages);
return true;
}
diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h
index ca7a15bd4845..e64eb607eb45 100644
--- a/drivers/block/zram/zram_drv.h
+++ b/drivers/block/zram/zram_drv.h
@@ -69,6 +69,9 @@ struct zram_table_entry {
unsigned long element;
};
unsigned long flags;
+#ifdef CONFIG_PREEMPT_RT
+ spinlock_t lock;
+#endif
#ifdef CONFIG_ZRAM_MEMORY_TRACKING
ktime_t ac_time;
#endif
--
2.45.2

52
buildroot-external/patches/linux/0024-preempt-Put-preempt_enable-within-an-instrumentation.patch
View File

@ -1,52 +0,0 @@
From b21d1ed96731fbdae2f48d5e3e802e431dd3cce6 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 8 Mar 2023 16:29:38 +0100
Subject: [PATCH 024/198] preempt: Put preempt_enable() within an
instrumentation*() section.
Callers of preempt_enable() can be within an noinstr section leading to:
| vmlinux.o: warning: objtool: native_sched_clock+0x97: call to preempt_schedule_notrace_thunk() leaves .noinstr.text section
| vmlinux.o: warning: objtool: kvm_clock_read+0x22: call to preempt_schedule_notrace_thunk() leaves .noinstr.text section
| vmlinux.o: warning: objtool: local_clock+0xb4: call to preempt_schedule_notrace_thunk() leaves .noinstr.text section
| vmlinux.o: warning: objtool: enter_from_user_mode+0xea: call to preempt_schedule_thunk() leaves .noinstr.text section
| vmlinux.o: warning: objtool: syscall_enter_from_user_mode+0x140: call to preempt_schedule_thunk() leaves .noinstr.text section
| vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare+0xf2: call to preempt_schedule_thunk() leaves .noinstr.text section
| vmlinux.o: warning: objtool: irqentry_enter_from_user_mode+0xea: call to preempt_schedule_thunk() leaves .noinstr.text section
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20230309072724.3F6zRkvw@linutronix.de
---
include/linux/preempt.h | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/include/linux/preempt.h b/include/linux/preempt.h
index 9aa6358a1a16..cd16f0330fba 100644
--- a/include/linux/preempt.h
+++ b/include/linux/preempt.h
@@ -230,15 +230,21 @@ do { \
#define preempt_enable() \
do { \
barrier(); \
- if (unlikely(preempt_count_dec_and_test())) \
+ if (unlikely(preempt_count_dec_and_test())) { \
+ instrumentation_begin(); \
__preempt_schedule(); \
+ instrumentation_end(); \
+ } \
} while (0)
#define preempt_enable_notrace() \
do { \
barrier(); \
- if (unlikely(__preempt_count_dec_and_test())) \
+ if (unlikely(__preempt_count_dec_and_test())) { \
+ instrumentation_begin(); \
__preempt_schedule_notrace(); \
+ instrumentation_end(); \
+ } \
} while (0)
#define preempt_check_resched() \
--
2.45.2

61
buildroot-external/patches/linux/0025-sched-core-Provide-a-method-to-check-if-a-task-is-PI.patch
View File

@ -1,61 +0,0 @@
From 9e74fe7b9f9d7e48bed2b9a35436905afd3730e5 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 4 Aug 2023 13:30:37 +0200
Subject: [PATCH 025/198] sched/core: Provide a method to check if a task is
PI-boosted.
Provide a method to check if a task inherited the priority from another
task. This happens if a task owns a lock which is requested by a task
with higher priority. This can be used as a hint to add a preemption
point to the critical section.
Provide a function which reports true if the task is PI-boosted.
Link: https://lore.kernel.org/r/20230804113039.419794-2-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
include/linux/sched.h | 1 +
kernel/sched/core.c | 15 +++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 67623ffd4a8e..eab173e5d09b 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1905,6 +1905,7 @@ static inline int dl_task_check_affinity(struct task_struct *p, const struct cpu
}
#endif
+extern bool task_is_pi_boosted(const struct task_struct *p);
extern int yield_to(struct task_struct *p, bool preempt);
extern void set_user_nice(struct task_struct *p, long nice);
extern int task_prio(const struct task_struct *p);
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a1fc8d66c7ac..b917a854ac50 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -8926,6 +8926,21 @@ static inline void preempt_dynamic_init(void) { }
#endif /* #ifdef CONFIG_PREEMPT_DYNAMIC */
+/*
+ * task_is_pi_boosted - Check if task has been PI boosted.
+ * @p: Task to check.
+ *
+ * Return true if task is subject to priority inheritance.
+ */
+bool task_is_pi_boosted(const struct task_struct *p)
+{
+ int prio = p->prio;
+
+ if (!rt_prio(prio))
+ return false;
+ return prio != p->normal_prio;
+}
+
/**
* yield - yield the current processor to other threads.
*
--
2.45.2

67
buildroot-external/patches/linux/0026-softirq-Add-function-to-preempt-serving-softirqs.patch
View File

@ -1,67 +0,0 @@
From 1031f963cee63a59647b27fc8b53d5ad2de5ce3f Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 4 Aug 2023 13:30:38 +0200
Subject: [PATCH 026/198] softirq: Add function to preempt serving softirqs.
Add a functionality for the softirq handler to preempt its current work
if needed. The softirq core has no particular state. It reads and resets
the pending softirq bits and then processes one after the other.
It can already be preempted while it invokes a certain softirq handler.
By enabling the BH the softirq core releases the per-CPU bh lock which
serializes all softirq handler. It is safe to do as long as the code
does not expect any serialisation in between. A typical scenarion would
after the invocation of callback where no state needs to be preserved
before the next callback is invoked.
Add functionaliry to preempt the serving softirqs.
Link: https://lore.kernel.org/r/20230804113039.419794-3-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
include/linux/bottom_half.h | 2 ++
kernel/softirq.c | 13 +++++++++++++
2 files changed, 15 insertions(+)
diff --git a/include/linux/bottom_half.h b/include/linux/bottom_half.h
index fc53e0ad56d9..448bbef47456 100644
--- a/include/linux/bottom_half.h
+++ b/include/linux/bottom_half.h
@@ -35,8 +35,10 @@ static inline void local_bh_enable(void)
#ifdef CONFIG_PREEMPT_RT
extern bool local_bh_blocked(void);
+extern void softirq_preempt(void);
#else
static inline bool local_bh_blocked(void) { return false; }
+static inline void softirq_preempt(void) { }
#endif
#endif /* _LINUX_BH_H */
diff --git a/kernel/softirq.c b/kernel/softirq.c
index ea6198bf64e0..2fde8af88e48 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -247,6 +247,19 @@ void __local_bh_enable_ip(unsigned long ip, unsigned int cnt)
}
EXPORT_SYMBOL(__local_bh_enable_ip);
+void softirq_preempt(void)
+{
+ if (WARN_ON_ONCE(!preemptible()))
+ return;
+
+ if (WARN_ON_ONCE(__this_cpu_read(softirq_ctrl.cnt) != SOFTIRQ_OFFSET))
+ return;
+
+ __local_bh_enable(SOFTIRQ_OFFSET, true);
+ /* preemption point */
+ __local_bh_disable_ip(_RET_IP_, SOFTIRQ_OFFSET);
+}
+
/*
* Invoked from ksoftirqd_run() outside of the interrupt disabled section
* to acquire the per CPU local lock for reentrancy protection.
--
2.45.2

52
buildroot-external/patches/linux/0027-time-Allow-to-preempt-after-a-callback.patch
View File

@ -1,52 +0,0 @@
From e416bc4129bd60565fd3a736494416ef56b1b676 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 4 Aug 2023 13:30:39 +0200
Subject: [PATCH 027/198] time: Allow to preempt after a callback.
The TIMER_SOFTIRQ handler invokes timer callbacks of the expired timers.
Before each invocation the timer_base::lock is dropped. The only lock
that is still held is the timer_base::expiry_lock and the per-CPU
bh-lock as part of local_bh_disable(). The former is released as part
of lock up prevention if the timer is preempted by the caller which is
waiting for its completion.
Both locks are already released as part of timer_sync_wait_running().
This can be extended by also releasing in bh-lock. The timer core does
not rely on any state that is serialized by the bh-lock. The timer
callback expects the bh-state to be serialized by the lock but there is
no need to keep state synchronized while invoking multiple callbacks.
Preempt handling softirqs and release all locks after a timer invocation
if the current has inherited priority.
Link: https://lore.kernel.org/r/20230804113039.419794-4-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
kernel/time/timer.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 7cad6fe3c035..b3fbe97d1e34 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1470,9 +1470,16 @@ static inline void timer_base_unlock_expiry(struct timer_base *base)
*/
static void timer_sync_wait_running(struct timer_base *base)
{
- if (atomic_read(&base->timer_waiters)) {
+ bool need_preempt;
+
+ need_preempt = task_is_pi_boosted(current);
+ if (need_preempt || atomic_read(&base->timer_waiters)) {
raw_spin_unlock_irq(&base->lock);
spin_unlock(&base->expiry_lock);
+
+ if (need_preempt)
+ softirq_preempt();
+
spin_lock(&base->expiry_lock);
raw_spin_lock_irq(&base->lock);
}
--
2.45.2

98
buildroot-external/patches/linux/0028-serial-core-Use-lock-wrappers.patch
View File

@ -1,98 +0,0 @@
From af075b784af639458d4408659d908a5b165b0696 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:19 +0206
Subject: [PATCH 028/198] serial: core: Use lock wrappers
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-3-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
include/linux/serial_core.h | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 052df85dfd59..71d925e8a79b 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -1078,14 +1078,14 @@ static inline void uart_unlock_and_check_sysrq(struct uart_port *port)
u8 sysrq_ch;
if (!port->has_sysrq) {
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return;
}
sysrq_ch = port->sysrq_ch;
port->sysrq_ch = 0;
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
if (sysrq_ch)
handle_sysrq(sysrq_ch);
@@ -1097,14 +1097,14 @@ static inline void uart_unlock_and_check_sysrq_irqrestore(struct uart_port *port
u8 sysrq_ch;
if (!port->has_sysrq) {
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return;
}
sysrq_ch = port->sysrq_ch;
port->sysrq_ch = 0;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
if (sysrq_ch)
handle_sysrq(sysrq_ch);
@@ -1120,12 +1120,12 @@ static inline int uart_prepare_sysrq_char(struct uart_port *port, u8 ch)
}
static inline void uart_unlock_and_check_sysrq(struct uart_port *port)
{
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
}
static inline void uart_unlock_and_check_sysrq_irqrestore(struct uart_port *port,
unsigned long flags)
{
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
#endif /* CONFIG_MAGIC_SYSRQ_SERIAL */
--
2.45.2

80
buildroot-external/patches/linux/0029-serial-21285-Use-port-lock-wrappers.patch
View File

@ -1,80 +0,0 @@
From 74b915d6ea260fa05980f3a46fcd654e39e78e2d Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:20 +0206
Subject: [PATCH 029/198] serial: 21285: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-4-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/21285.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/21285.c b/drivers/tty/serial/21285.c
index d756fcc884cb..4de0c975ebdc 100644
--- a/drivers/tty/serial/21285.c
+++ b/drivers/tty/serial/21285.c
@@ -185,14 +185,14 @@ static void serial21285_break_ctl(struct uart_port *port, int break_state)
unsigned long flags;
unsigned int h_lcr;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
h_lcr = *CSR_H_UBRLCR;
if (break_state)
h_lcr |= H_UBRLCR_BREAK;
else
h_lcr &= ~H_UBRLCR_BREAK;
*CSR_H_UBRLCR = h_lcr;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static int serial21285_startup(struct uart_port *port)
@@ -272,7 +272,7 @@ serial21285_set_termios(struct uart_port *port, struct ktermios *termios,
if (port->fifosize)
h_lcr |= H_UBRLCR_FIFO;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/*
* Update the per-port timeout.
@@ -309,7 +309,7 @@ serial21285_set_termios(struct uart_port *port, struct ktermios *termios,
*CSR_H_UBRLCR = h_lcr;
*CSR_UARTCON = 1;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *serial21285_type(struct uart_port *port)
--
2.45.2

66
buildroot-external/patches/linux/0030-serial-8250_aspeed_vuart-Use-port-lock-wrappers.patch
View File

@ -1,66 +0,0 @@
From 0134106309ba05033201cfa72e9eb2f8d45483c2 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:21 +0206
Subject: [PATCH 030/198] serial: 8250_aspeed_vuart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-5-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/8250/8250_aspeed_vuart.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_aspeed_vuart.c b/drivers/tty/serial/8250/8250_aspeed_vuart.c
index 4a9e71b2dbbc..021949f252f8 100644
--- a/drivers/tty/serial/8250/8250_aspeed_vuart.c
+++ b/drivers/tty/serial/8250/8250_aspeed_vuart.c
@@ -288,9 +288,9 @@ static void aspeed_vuart_set_throttle(struct uart_port *port, bool throttle)
struct uart_8250_port *up = up_to_u8250p(port);
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
__aspeed_vuart_set_throttle(up, throttle);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void aspeed_vuart_throttle(struct uart_port *port)
@@ -340,7 +340,7 @@ static int aspeed_vuart_handle_irq(struct uart_port *port)
if (iir & UART_IIR_NO_INT)
return 0;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
lsr = serial_port_in(port, UART_LSR);
--
2.45.2

156
buildroot-external/patches/linux/0031-serial-8250_bcm7271-Use-port-lock-wrappers.patch
View File

@ -1,156 +0,0 @@
From 7446c26604cd03192e2cbc113641533204f235bf Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:22 +0206
Subject: [PATCH 031/198] serial: 8250_bcm7271: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-6-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/8250/8250_bcm7271.c | 28 +++++++++++++-------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_bcm7271.c b/drivers/tty/serial/8250/8250_bcm7271.c
index 9afd5979c9e0..db23b3a02aef 100644
--- a/drivers/tty/serial/8250/8250_bcm7271.c
+++ b/drivers/tty/serial/8250/8250_bcm7271.c
@@ -567,7 +567,7 @@ static irqreturn_t brcmuart_isr(int irq, void *dev_id)
if (interrupts == 0)
return IRQ_NONE;
- spin_lock_irqsave(&up->lock, flags);
+ uart_port_lock_irqsave(up, &flags);
/* Clear all interrupts */
udma_writel(priv, REGS_DMA_ISR, UDMA_INTR_CLEAR, interrupts);
@@ -581,7 +581,7 @@ static irqreturn_t brcmuart_isr(int irq, void *dev_id)
if ((rval | tval) == 0)
dev_warn(dev, "Spurious interrupt: 0x%x\n", interrupts);
- spin_unlock_irqrestore(&up->lock, flags);
+ uart_port_unlock_irqrestore(up, flags);
return IRQ_HANDLED;
}
@@ -608,10 +608,10 @@ static int brcmuart_startup(struct uart_port *port)
*
* Synchronize UART_IER access against the console.
*/
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
up->ier &= ~UART_IER_RDI;
serial_port_out(port, UART_IER, up->ier);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
priv->tx_running = false;
priv->dma.rx_dma = NULL;
@@ -629,7 +629,7 @@ static void brcmuart_shutdown(struct uart_port *port)
struct brcmuart_priv *priv = up->port.private_data;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
priv->shutdown = true;
if (priv->dma_enabled) {
stop_rx_dma(up);
@@ -645,7 +645,7 @@ static void brcmuart_shutdown(struct uart_port *port)
*/
up->dma = NULL;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
serial8250_do_shutdown(port);
}
@@ -807,7 +807,7 @@ static int brcmuart_handle_irq(struct uart_port *p)
* interrupt but there is no data ready.
*/
if (((iir & UART_IIR_ID) == UART_IIR_RX_TIMEOUT) && !(priv->shutdown)) {
- spin_lock_irqsave(&p->lock, flags);
+ uart_port_lock_irqsave(p, &flags);
status = serial_port_in(p, UART_LSR);
if ((status & UART_LSR_DR) == 0) {
@@ -832,7 +832,7 @@ static int brcmuart_handle_irq(struct uart_port *p)
handled = 1;
}
- spin_unlock_irqrestore(&p->lock, flags);
+ uart_port_unlock_irqrestore(p, flags);
if (handled)
return 1;
}
@@ -850,7 +850,7 @@ static enum hrtimer_restart brcmuart_hrtimer_func(struct hrtimer *t)
if (priv->shutdown)
return HRTIMER_NORESTART;
- spin_lock_irqsave(&p->lock, flags);
+ uart_port_lock_irqsave(p, &flags);
status = serial_port_in(p, UART_LSR);
/*
@@ -874,7 +874,7 @@ static enum hrtimer_restart brcmuart_hrtimer_func(struct hrtimer *t)
status |= UART_MCR_RTS;
serial_port_out(p, UART_MCR, status);
}
- spin_unlock_irqrestore(&p->lock, flags);
+ uart_port_unlock_irqrestore(p, flags);
return HRTIMER_NORESTART;
}
@@ -1173,10 +1173,10 @@ static int __maybe_unused brcmuart_suspend(struct device *dev)
* This will prevent resume from enabling RTS before the
* baud rate has been restored.
*/
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
priv->saved_mctrl = port->mctrl;
port->mctrl &= ~TIOCM_RTS;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
serial8250_suspend_port(priv->line);
clk_disable_unprepare(priv->baud_mux_clk);
@@ -1215,10 +1215,10 @@ static int __maybe_unused brcmuart_resume(struct device *dev)
if (priv->saved_mctrl & TIOCM_RTS) {
/* Restore RTS */
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
port->mctrl |= TIOCM_RTS;
port->ops->set_mctrl(port, port->mctrl);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
return 0;
--
2.45.2

472
buildroot-external/patches/linux/0032-serial-8250-Use-port-lock-wrappers.patch
View File

@ -1,472 +0,0 @@
From 6d7ef26400cb5ebed5178eea4753c025a953d85e Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:23 +0206
Subject: [PATCH 032/198] serial: 8250: Use port lock wrappers
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-7-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/8250/8250_core.c | 12 ++--
drivers/tty/serial/8250/8250_port.c | 100 ++++++++++++++--------------
2 files changed, 56 insertions(+), 56 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index 3449f8790e46..904e319e6b4a 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -259,7 +259,7 @@ static void serial8250_backup_timeout(struct timer_list *t)
unsigned int iir, ier = 0, lsr;
unsigned long flags;
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
/*
* Must disable interrupts or else we risk racing with the interrupt
@@ -292,7 +292,7 @@ static void serial8250_backup_timeout(struct timer_list *t)
if (up->port.irq)
serial_out(up, UART_IER, ier);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
/* Standard timer interval plus 0.2s to keep the port running */
mod_timer(&up->timer,
@@ -992,11 +992,11 @@ static void serial_8250_overrun_backoff_work(struct work_struct *work)
struct uart_port *port = &up->port;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
up->ier |= UART_IER_RLSI | UART_IER_RDI;
up->port.read_status_mask |= UART_LSR_DR;
serial_out(up, UART_IER, up->ier);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
/**
@@ -1194,9 +1194,9 @@ void serial8250_unregister_port(int line)
if (uart->em485) {
unsigned long flags;
- spin_lock_irqsave(&uart->port.lock, flags);
+ uart_port_lock_irqsave(&uart->port, &flags);
serial8250_em485_destroy(uart);
- spin_unlock_irqrestore(&uart->port.lock, flags);
+ uart_port_unlock_irqrestore(&uart->port, flags);
}
uart_remove_one_port(&serial8250_reg, &uart->port);
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index a17803da83f8..cba5a1b1030f 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -689,7 +689,7 @@ static void serial8250_set_sleep(struct uart_8250_port *p, int sleep)
if (p->capabilities & UART_CAP_SLEEP) {
/* Synchronize UART_IER access against the console. */
- spin_lock_irq(&p->port.lock);
+ uart_port_lock_irq(&p->port);
if (p->capabilities & UART_CAP_EFR) {
lcr = serial_in(p, UART_LCR);
efr = serial_in(p, UART_EFR);
@@ -703,7 +703,7 @@ static void serial8250_set_sleep(struct uart_8250_port *p, int sleep)
serial_out(p, UART_EFR, efr);
serial_out(p, UART_LCR, lcr);
}
- spin_unlock_irq(&p->port.lock);
+ uart_port_unlock_irq(&p->port);
}
serial8250_rpm_put(p);
@@ -746,9 +746,9 @@ static void enable_rsa(struct uart_8250_port *up)
{
if (up->port.type == PORT_RSA) {
if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) {
- spin_lock_irq(&up->port.lock);
+ uart_port_lock_irq(&up->port);
__enable_rsa(up);
- spin_unlock_irq(&up->port.lock);
+ uart_port_unlock_irq(&up->port);
}
if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16)
serial_out(up, UART_RSA_FRR, 0);
@@ -768,7 +768,7 @@ static void disable_rsa(struct uart_8250_port *up)
if (up->port.type == PORT_RSA &&
up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) {
- spin_lock_irq(&up->port.lock);
+ uart_port_lock_irq(&up->port);
mode = serial_in(up, UART_RSA_MSR);
result = !(mode & UART_RSA_MSR_FIFO);
@@ -781,7 +781,7 @@ static void disable_rsa(struct uart_8250_port *up)
if (result)
up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16;
- spin_unlock_irq(&up->port.lock);
+ uart_port_unlock_irq(&up->port);
}
}
#endif /* CONFIG_SERIAL_8250_RSA */
@@ -1172,7 +1172,7 @@ static void autoconfig(struct uart_8250_port *up)
*
* Synchronize UART_IER access against the console.
*/
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
up->capabilities = 0;
up->bugs = 0;
@@ -1211,7 +1211,7 @@ static void autoconfig(struct uart_8250_port *up)
/*
* We failed; there's nothing here
*/
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
DEBUG_AUTOCONF("IER test failed (%02x, %02x) ",
scratch2, scratch3);
goto out;
@@ -1235,7 +1235,7 @@ static void autoconfig(struct uart_8250_port *up)
status1 = serial_in(up, UART_MSR) & UART_MSR_STATUS_BITS;
serial8250_out_MCR(up, save_mcr);
if (status1 != (UART_MSR_DCD | UART_MSR_CTS)) {
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
DEBUG_AUTOCONF("LOOP test failed (%02x) ",
status1);
goto out;
@@ -1304,7 +1304,7 @@ static void autoconfig(struct uart_8250_port *up)
serial8250_clear_IER(up);
out_unlock:
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
/*
* Check if the device is a Fintek F81216A
@@ -1341,9 +1341,9 @@ static void autoconfig_irq(struct uart_8250_port *up)
probe_irq_off(probe_irq_on());
save_mcr = serial8250_in_MCR(up);
/* Synchronize UART_IER access against the console. */
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
save_ier = serial_in(up, UART_IER);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
serial8250_out_MCR(up, UART_MCR_OUT1 | UART_MCR_OUT2);
irqs = probe_irq_on();
@@ -1356,9 +1356,9 @@ static void autoconfig_irq(struct uart_8250_port *up)
UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2);
}
/* Synchronize UART_IER access against the console. */
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
serial_out(up, UART_IER, UART_IER_ALL_INTR);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
serial_in(up, UART_LSR);
serial_in(up, UART_RX);
serial_in(up, UART_IIR);
@@ -1369,9 +1369,9 @@ static void autoconfig_irq(struct uart_8250_port *up)
serial8250_out_MCR(up, save_mcr);
/* Synchronize UART_IER access against the console. */
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
serial_out(up, UART_IER, save_ier);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
if (port->flags & UPF_FOURPORT)
outb_p(save_ICP, ICP);
@@ -1436,13 +1436,13 @@ static enum hrtimer_restart serial8250_em485_handle_stop_tx(struct hrtimer *t)
unsigned long flags;
serial8250_rpm_get(p);
- spin_lock_irqsave(&p->port.lock, flags);
+ uart_port_lock_irqsave(&p->port, &flags);
if (em485->active_timer == &em485->stop_tx_timer) {
p->rs485_stop_tx(p);
em485->active_timer = NULL;
em485->tx_stopped = true;
}
- spin_unlock_irqrestore(&p->port.lock, flags);
+ uart_port_unlock_irqrestore(&p->port, flags);
serial8250_rpm_put(p);
return HRTIMER_NORESTART;
@@ -1624,12 +1624,12 @@ static enum hrtimer_restart serial8250_em485_handle_start_tx(struct hrtimer *t)
struct uart_8250_port *p = em485->port;
unsigned long flags;
- spin_lock_irqsave(&p->port.lock, flags);
+ uart_port_lock_irqsave(&p->port, &flags);
if (em485->active_timer == &em485->start_tx_timer) {
__start_tx(&p->port);
em485->active_timer = NULL;
}
- spin_unlock_irqrestore(&p->port.lock, flags);
+ uart_port_unlock_irqrestore(&p->port, flags);
return HRTIMER_NORESTART;
}
@@ -1912,7 +1912,7 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
if (iir & UART_IIR_NO_INT)
return 0;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
status = serial_lsr_in(up);
@@ -1982,9 +1982,9 @@ static int serial8250_tx_threshold_handle_irq(struct uart_port *port)
if ((iir & UART_IIR_ID) == UART_IIR_THRI) {
struct uart_8250_port *up = up_to_u8250p(port);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
serial8250_tx_chars(up);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
iir = serial_port_in(port, UART_IIR);
@@ -1999,10 +1999,10 @@ static unsigned int serial8250_tx_empty(struct uart_port *port)
serial8250_rpm_get(up);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (!serial8250_tx_dma_running(up) && uart_lsr_tx_empty(serial_lsr_in(up)))
result = TIOCSER_TEMT;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
serial8250_rpm_put(up);
@@ -2064,13 +2064,13 @@ static void serial8250_break_ctl(struct uart_port *port, int break_state)
unsigned long flags;
serial8250_rpm_get(up);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (break_state == -1)
up->lcr |= UART_LCR_SBC;
else
up->lcr &= ~UART_LCR_SBC;
serial_port_out(port, UART_LCR, up->lcr);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
serial8250_rpm_put(up);
}
@@ -2205,7 +2205,7 @@ int serial8250_do_startup(struct uart_port *port)
*
* Synchronize UART_IER access against the console.
*/
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
up->acr = 0;
serial_port_out(port, UART_LCR, UART_LCR_CONF_MODE_B);
serial_port_out(port, UART_EFR, UART_EFR_ECB);
@@ -2215,7 +2215,7 @@ int serial8250_do_startup(struct uart_port *port)
serial_port_out(port, UART_LCR, UART_LCR_CONF_MODE_B);
serial_port_out(port, UART_EFR, UART_EFR_ECB);
serial_port_out(port, UART_LCR, 0);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
if (port->type == PORT_DA830) {
@@ -2224,10 +2224,10 @@ int serial8250_do_startup(struct uart_port *port)
*
* Synchronize UART_IER access against the console.
*/
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
serial_port_out(port, UART_IER, 0);
serial_port_out(port, UART_DA830_PWREMU_MGMT, 0);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
mdelay(10);
/* Enable Tx, Rx and free run mode */
@@ -2341,7 +2341,7 @@ int serial8250_do_startup(struct uart_port *port)
*
* Synchronize UART_IER access against the console.
*/
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
wait_for_xmitr(up, UART_LSR_THRE);
serial_port_out_sync(port, UART_IER, UART_IER_THRI);
@@ -2353,7 +2353,7 @@ int serial8250_do_startup(struct uart_port *port)
iir = serial_port_in(port, UART_IIR);
serial_port_out(port, UART_IER, 0);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
if (port->irqflags & IRQF_SHARED)
enable_irq(port->irq);
@@ -2376,7 +2376,7 @@ int serial8250_do_startup(struct uart_port *port)
*/
serial_port_out(port, UART_LCR, UART_LCR_WLEN8);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (up->port.flags & UPF_FOURPORT) {
if (!up->port.irq)
up->port.mctrl |= TIOCM_OUT1;
@@ -2422,7 +2422,7 @@ int serial8250_do_startup(struct uart_port *port)
}
dont_test_tx_en:
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
/*
* Clear the interrupt registers again for luck, and clear the
@@ -2493,17 +2493,17 @@ void serial8250_do_shutdown(struct uart_port *port)
*
* Synchronize UART_IER access against the console.
*/
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
up->ier = 0;
serial_port_out(port, UART_IER, 0);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
synchronize_irq(port->irq);
if (up->dma)
serial8250_release_dma(up);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (port->flags & UPF_FOURPORT) {
/* reset interrupts on the AST Fourport board */
inb((port->iobase & 0xfe0) | 0x1f);
@@ -2512,7 +2512,7 @@ void serial8250_do_shutdown(struct uart_port *port)
port->mctrl &= ~TIOCM_OUT2;
serial8250_set_mctrl(port, port->mctrl);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
/*
* Disable break condition and FIFOs
@@ -2748,14 +2748,14 @@ void serial8250_update_uartclk(struct uart_port *port, unsigned int uartclk)
quot = serial8250_get_divisor(port, baud, &frac);
serial8250_rpm_get(up);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
uart_update_timeout(port, termios->c_cflag, baud);
serial8250_set_divisor(port, baud, quot, frac);
serial_port_out(port, UART_LCR, up->lcr);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
serial8250_rpm_put(up);
out_unlock:
@@ -2792,7 +2792,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
* Synchronize UART_IER access against the console.
*/
serial8250_rpm_get(up);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
up->lcr = cval; /* Save computed LCR */
@@ -2895,7 +2895,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
serial_port_out(port, UART_FCR, up->fcr); /* set fcr */
}
serial8250_set_mctrl(port, port->mctrl);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
serial8250_rpm_put(up);
/* Don't rewrite B0 */
@@ -2918,15 +2918,15 @@ void serial8250_do_set_ldisc(struct uart_port *port, struct ktermios *termios)
{
if (termios->c_line == N_PPS) {
port->flags |= UPF_HARDPPS_CD;
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
serial8250_enable_ms(port);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
} else {
port->flags &= ~UPF_HARDPPS_CD;
if (!UART_ENABLE_MS(port, termios->c_cflag)) {
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
serial8250_disable_ms(port);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
}
}
}
@@ -3400,9 +3400,9 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s,
touch_nmi_watchdog();
if (oops_in_progress)
- locked = spin_trylock_irqsave(&port->lock, flags);
+ locked = uart_port_trylock_irqsave(port, &flags);
else
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/*
* First save the IER then disable the interrupts
@@ -3472,7 +3472,7 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s,
serial8250_modem_status(up);
if (locked)
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static unsigned int probe_baud(struct uart_port *port)
--
2.45.2

85
buildroot-external/patches/linux/0033-serial-8250_dma-Use-port-lock-wrappers.patch
View File

@ -1,85 +0,0 @@
From fc0cf093a51c9d7b446d83d1aa4ac9f8f7d53d16 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:24 +0206
Subject: [PATCH 033/198] serial: 8250_dma: Use port lock wrappers
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-8-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/8250/8250_dma.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c
index 7fa66501792d..8b30ca8fdd3f 100644
--- a/drivers/tty/serial/8250/8250_dma.c
+++ b/drivers/tty/serial/8250/8250_dma.c
@@ -22,7 +22,7 @@ static void __dma_tx_complete(void *param)
dma_sync_single_for_cpu(dma->txchan->device->dev, dma->tx_addr,
UART_XMIT_SIZE, DMA_TO_DEVICE);
- spin_lock_irqsave(&p->port.lock, flags);
+ uart_port_lock_irqsave(&p->port, &flags);
dma->tx_running = 0;
@@ -35,7 +35,7 @@ static void __dma_tx_complete(void *param)
if (ret || !dma->tx_running)
serial8250_set_THRI(p);
- spin_unlock_irqrestore(&p->port.lock, flags);
+ uart_port_unlock_irqrestore(&p->port, flags);
}
static void __dma_rx_complete(struct uart_8250_port *p)
@@ -70,7 +70,7 @@ static void dma_rx_complete(void *param)
struct uart_8250_dma *dma = p->dma;
unsigned long flags;
- spin_lock_irqsave(&p->port.lock, flags);
+ uart_port_lock_irqsave(&p->port, &flags);
if (dma->rx_running)
__dma_rx_complete(p);
@@ -80,7 +80,7 @@ static void dma_rx_complete(void *param)
*/
if (!dma->rx_running && (serial_lsr_in(p) & UART_LSR_DR))
p->dma->rx_dma(p);
- spin_unlock_irqrestore(&p->port.lock, flags);
+ uart_port_unlock_irqrestore(&p->port, flags);
}
int serial8250_tx_dma(struct uart_8250_port *p)
--
2.45.2

74
buildroot-external/patches/linux/0034-serial-8250_dw-Use-port-lock-wrappers.patch
View File

@ -1,74 +0,0 @@
From b8902016840131f33ef21a02de68c492754ff094 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:25 +0206
Subject: [PATCH 034/198] serial: 8250_dw: Use port lock wrappers
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-9-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/8250/8250_dw.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 8aed33be2ebf..5367bcc6256c 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -290,20 +290,20 @@ static int dw8250_handle_irq(struct uart_port *p)
* so we limit the workaround only to non-DMA mode.
*/
if (!up->dma && rx_timeout) {
- spin_lock_irqsave(&p->lock, flags);
+ uart_port_lock_irqsave(p, &flags);
status = serial_lsr_in(up);
if (!(status & (UART_LSR_DR | UART_LSR_BI)))
(void) p->serial_in(p, UART_RX);
- spin_unlock_irqrestore(&p->lock, flags);
+ uart_port_unlock_irqrestore(p, flags);
}
/* Manually stop the Rx DMA transfer when acting as flow controller */
if (quirks & DW_UART_QUIRK_IS_DMA_FC && up->dma && up->dma->rx_running && rx_timeout) {
- spin_lock_irqsave(&p->lock, flags);
+ uart_port_lock_irqsave(p, &flags);
status = serial_lsr_in(up);
- spin_unlock_irqrestore(&p->lock, flags);
+ uart_port_unlock_irqrestore(p, flags);
if (status & (UART_LSR_DR | UART_LSR_BI)) {
dw8250_writel_ext(p, RZN1_UART_RDMACR, 0);
--
2.45.2

57
buildroot-external/patches/linux/0035-serial-8250_exar-Use-port-lock-wrappers.patch
View File

@ -1,57 +0,0 @@
From ebb1f40b7cff4130355091b16d8b084992e8ab73 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:26 +0206
Subject: [PATCH 035/198] serial: 8250_exar: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-10-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/8250/8250_exar.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index 27430fdd9e76..17be6ad24a0f 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -243,9 +243,9 @@ static int xr17v35x_startup(struct uart_port *port)
*
* Synchronize UART_IER access against the console.
*/
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
serial_port_out(port, UART_IER, 0);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
return serial8250_do_startup(port);
}
--
2.45.2

68
buildroot-external/patches/linux/0036-serial-8250_fsl-Use-port-lock-wrappers.patch
View File

@ -1,68 +0,0 @@
From 3b586d0c385c87dbaec0b5f0f17412cf9d2a5895 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:27 +0206
Subject: [PATCH 036/198] serial: 8250_fsl: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-11-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/8250/8250_fsl.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_fsl.c b/drivers/tty/serial/8250/8250_fsl.c
index 6af4e1c1210a..f522eb5026c9 100644
--- a/drivers/tty/serial/8250/8250_fsl.c
+++ b/drivers/tty/serial/8250/8250_fsl.c
@@ -30,11 +30,11 @@ int fsl8250_handle_irq(struct uart_port *port)
unsigned int iir;
struct uart_8250_port *up = up_to_u8250p(port);
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
iir = port->serial_in(port, UART_IIR);
if (iir & UART_IIR_NO_INT) {
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
return 0;
}
@@ -54,7 +54,7 @@ int fsl8250_handle_irq(struct uart_port *port)
if (unlikely(up->lsr_saved_flags & UART_LSR_BI)) {
up->lsr_saved_flags &= ~UART_LSR_BI;
port->serial_in(port, UART_RX);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
return 1;
}
--
2.45.2

82
buildroot-external/patches/linux/0037-serial-8250_mtk-Use-port-lock-wrappers.patch
View File

@ -1,82 +0,0 @@
From b859af0fd194fed9bc10a7193b1aad2643dcb87f Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:28 +0206
Subject: [PATCH 037/198] serial: 8250_mtk: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-12-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/8250/8250_mtk.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c
index 28f9a2679a20..33699e86eb52 100644
--- a/drivers/tty/serial/8250/8250_mtk.c
+++ b/drivers/tty/serial/8250/8250_mtk.c
@@ -102,7 +102,7 @@ static void mtk8250_dma_rx_complete(void *param)
if (data->rx_status == DMA_RX_SHUTDOWN)
return;
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
dmaengine_tx_status(dma->rxchan, dma->rx_cookie, &state);
total = dma->rx_size - state.residue;
@@ -128,7 +128,7 @@ static void mtk8250_dma_rx_complete(void *param)
mtk8250_rx_dma(up);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static void mtk8250_rx_dma(struct uart_8250_port *up)
@@ -372,7 +372,7 @@ mtk8250_set_termios(struct uart_port *port, struct ktermios *termios,
* Ok, we're now changing the port state. Do it with
* interrupts disabled.
*/
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/*
* Update the per-port timeout.
@@ -420,7 +420,7 @@ mtk8250_set_termios(struct uart_port *port, struct ktermios *termios,
if (uart_console(port))
up->port.cons->cflag = termios->c_cflag;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
/* Don't rewrite B0 */
if (tty_termios_baud_rate(termios))
tty_termios_encode_baud_rate(termios, baud, baud);
--
2.45.2

241
buildroot-external/patches/linux/0038-serial-8250_omap-Use-port-lock-wrappers.patch
View File

@ -1,241 +0,0 @@
From 89c679b54a7b3877b5d4b67c3dce5571fc98ff32 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:29 +0206
Subject: [PATCH 038/198] serial: 8250_omap: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-13-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/8250/8250_omap.c | 52 ++++++++++++++---------------
1 file changed, 26 insertions(+), 26 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c
index 8f472a2080ff..78fc1f17d5e2 100644
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -405,7 +405,7 @@ static void omap_8250_set_termios(struct uart_port *port,
* interrupts disabled.
*/
pm_runtime_get_sync(port->dev);
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
/*
* Update the per-port timeout.
@@ -508,7 +508,7 @@ static void omap_8250_set_termios(struct uart_port *port,
}
omap8250_restore_regs(up);
- spin_unlock_irq(&up->port.lock);
+ uart_port_unlock_irq(&up->port);
pm_runtime_mark_last_busy(port->dev);
pm_runtime_put_autosuspend(port->dev);
@@ -533,7 +533,7 @@ static void omap_8250_pm(struct uart_port *port, unsigned int state,
pm_runtime_get_sync(port->dev);
/* Synchronize UART_IER access against the console. */
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
efr = serial_in(up, UART_EFR);
@@ -545,7 +545,7 @@ static void omap_8250_pm(struct uart_port *port, unsigned int state,
serial_out(up, UART_EFR, efr);
serial_out(up, UART_LCR, 0);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
pm_runtime_mark_last_busy(port->dev);
pm_runtime_put_autosuspend(port->dev);
@@ -676,7 +676,7 @@ static irqreturn_t omap8250_irq(int irq, void *dev_id)
unsigned long delay;
/* Synchronize UART_IER access against the console. */
- spin_lock(&port->lock);
+ uart_port_lock(port);
up->ier = port->serial_in(port, UART_IER);
if (up->ier & (UART_IER_RLSI | UART_IER_RDI)) {
port->ops->stop_rx(port);
@@ -686,7 +686,7 @@ static irqreturn_t omap8250_irq(int irq, void *dev_id)
*/
cancel_delayed_work(&up->overrun_backoff);
}
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
delay = msecs_to_jiffies(up->overrun_backoff_time_ms);
schedule_delayed_work(&up->overrun_backoff, delay);
@@ -733,10 +733,10 @@ static int omap_8250_startup(struct uart_port *port)
}
/* Synchronize UART_IER access against the console. */
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
up->ier = UART_IER_RLSI | UART_IER_RDI;
serial_out(up, UART_IER, up->ier);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
#ifdef CONFIG_PM
up->capabilities |= UART_CAP_RPM;
@@ -749,9 +749,9 @@ static int omap_8250_startup(struct uart_port *port)
serial_out(up, UART_OMAP_WER, priv->wer);
if (up->dma && !(priv->habit & UART_HAS_EFR2)) {
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
up->dma->rx_dma(up);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
}
enable_irq(up->port.irq);
@@ -777,10 +777,10 @@ static void omap_8250_shutdown(struct uart_port *port)
serial_out(up, UART_OMAP_EFR2, 0x0);
/* Synchronize UART_IER access against the console. */
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
up->ier = 0;
serial_out(up, UART_IER, 0);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
disable_irq_nosync(up->port.irq);
dev_pm_clear_wake_irq(port->dev);
@@ -805,10 +805,10 @@ static void omap_8250_throttle(struct uart_port *port)
pm_runtime_get_sync(port->dev);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
port->ops->stop_rx(port);
priv->throttled = true;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
pm_runtime_mark_last_busy(port->dev);
pm_runtime_put_autosuspend(port->dev);
@@ -823,14 +823,14 @@ static void omap_8250_unthrottle(struct uart_port *port)
pm_runtime_get_sync(port->dev);
/* Synchronize UART_IER access against the console. */
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
priv->throttled = false;
if (up->dma)
up->dma->rx_dma(up);
up->ier |= UART_IER_RLSI | UART_IER_RDI;
port->read_status_mask |= UART_LSR_DR;
serial_out(up, UART_IER, up->ier);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
pm_runtime_mark_last_busy(port->dev);
pm_runtime_put_autosuspend(port->dev);
@@ -974,7 +974,7 @@ static void __dma_rx_complete(void *param)
unsigned long flags;
/* Synchronize UART_IER access against the console. */
- spin_lock_irqsave(&p->port.lock, flags);
+ uart_port_lock_irqsave(&p->port, &flags);
/*
* If the tx status is not DMA_COMPLETE, then this is a delayed
@@ -983,7 +983,7 @@ static void __dma_rx_complete(void *param)
*/
if (dmaengine_tx_status(dma->rxchan, dma->rx_cookie, &state) !=
DMA_COMPLETE) {
- spin_unlock_irqrestore(&p->port.lock, flags);
+ uart_port_unlock_irqrestore(&p->port, flags);
return;
}
__dma_rx_do_complete(p);
@@ -994,7 +994,7 @@ static void __dma_rx_complete(void *param)
omap_8250_rx_dma(p);
}
- spin_unlock_irqrestore(&p->port.lock, flags);
+ uart_port_unlock_irqrestore(&p->port, flags);
}
static void omap_8250_rx_dma_flush(struct uart_8250_port *p)
@@ -1099,7 +1099,7 @@ static void omap_8250_dma_tx_complete(void *param)
dma_sync_single_for_cpu(dma->txchan->device->dev, dma->tx_addr,
UART_XMIT_SIZE, DMA_TO_DEVICE);
- spin_lock_irqsave(&p->port.lock, flags);
+ uart_port_lock_irqsave(&p->port, &flags);
dma->tx_running = 0;
@@ -1128,7 +1128,7 @@ static void omap_8250_dma_tx_complete(void *param)
serial8250_set_THRI(p);
}
- spin_unlock_irqrestore(&p->port.lock, flags);
+ uart_port_unlock_irqrestore(&p->port, flags);
}
static int omap_8250_tx_dma(struct uart_8250_port *p)
@@ -1294,7 +1294,7 @@ static int omap_8250_dma_handle_irq(struct uart_port *port)
return IRQ_HANDLED;
}
- spin_lock(&port->lock);
+ uart_port_lock(port);
status = serial_port_in(port, UART_LSR);
@@ -1774,15 +1774,15 @@ static int omap8250_runtime_resume(struct device *dev)
up = serial8250_get_port(priv->line);
if (up && omap8250_lost_context(up)) {
- spin_lock_irq(&up->port.lock);
+ uart_port_lock_irq(&up->port);
omap8250_restore_regs(up);
- spin_unlock_irq(&up->port.lock);
+ uart_port_unlock_irq(&up->port);
}
if (up && up->dma && up->dma->rxchan && !(priv->habit & UART_HAS_EFR2)) {
- spin_lock_irq(&up->port.lock);
+ uart_port_lock_irq(&up->port);
omap_8250_rx_dma(up);
- spin_unlock_irq(&up->port.lock);
+ uart_port_unlock_irq(&up->port);
}
priv->latency = priv->calc_latency;
--
2.45.2

71
buildroot-external/patches/linux/0039-serial-8250_pci1xxxx-Use-port-lock-wrappers.patch
View File

@ -1,71 +0,0 @@
From 6cf203f22919c9ce8bf0a9ccfe2de745fd7042e1 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:30 +0206
Subject: [PATCH 039/198] serial: 8250_pci1xxxx: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-14-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/8250/8250_pci1xxxx.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_pci1xxxx.c b/drivers/tty/serial/8250/8250_pci1xxxx.c
index a3b25779d921..53e238c8cc89 100644
--- a/drivers/tty/serial/8250/8250_pci1xxxx.c
+++ b/drivers/tty/serial/8250/8250_pci1xxxx.c
@@ -225,10 +225,10 @@ static bool pci1xxxx_port_suspend(int line)
if (port->suspended == 0 && port->dev) {
wakeup_mask = readb(up->port.membase + UART_WAKE_MASK_REG);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
port->mctrl &= ~TIOCM_OUT2;
port->ops->set_mctrl(port, port->mctrl);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
ret = (wakeup_mask & UART_WAKE_SRCS) != UART_WAKE_SRCS;
}
@@ -251,10 +251,10 @@ static void pci1xxxx_port_resume(int line)
writeb(UART_WAKE_SRCS, port->membase + UART_WAKE_REG);
if (port->suspended == 0) {
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
port->mctrl |= TIOCM_OUT2;
port->ops->set_mctrl(port, port->mctrl);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
mutex_unlock(&tport->mutex);
}
--
2.45.2

138
buildroot-external/patches/linux/0040-serial-altera_jtaguart-Use-port-lock-wrappers.patch
View File

@ -1,138 +0,0 @@
From 072715587bf21e30fa500c7a096398d7e1267b37 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:31 +0206
Subject: [PATCH 040/198] serial: altera_jtaguart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-15-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/altera_jtaguart.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/drivers/tty/serial/altera_jtaguart.c b/drivers/tty/serial/altera_jtaguart.c
index 5fab4c978891..7090b251dd4d 100644
--- a/drivers/tty/serial/altera_jtaguart.c
+++ b/drivers/tty/serial/altera_jtaguart.c
@@ -147,14 +147,14 @@ static irqreturn_t altera_jtaguart_interrupt(int irq, void *data)
isr = (readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) >>
ALTERA_JTAGUART_CONTROL_RI_OFF) & port->read_status_mask;
- spin_lock(&port->lock);
+ uart_port_lock(port);
if (isr & ALTERA_JTAGUART_CONTROL_RE_MSK)
altera_jtaguart_rx_chars(port);
if (isr & ALTERA_JTAGUART_CONTROL_WE_MSK)
altera_jtaguart_tx_chars(port);
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return IRQ_RETVAL(isr);
}
@@ -180,14 +180,14 @@ static int altera_jtaguart_startup(struct uart_port *port)
return ret;
}
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Enable RX interrupts now */
port->read_status_mask = ALTERA_JTAGUART_CONTROL_RE_MSK;
writel(port->read_status_mask,
port->membase + ALTERA_JTAGUART_CONTROL_REG);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return 0;
}
@@ -196,14 +196,14 @@ static void altera_jtaguart_shutdown(struct uart_port *port)
{
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Disable all interrupts now */
port->read_status_mask = 0;
writel(port->read_status_mask,
port->membase + ALTERA_JTAGUART_CONTROL_REG);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
free_irq(port->irq, port);
}
@@ -264,33 +264,33 @@ static void altera_jtaguart_console_putc(struct uart_port *port, unsigned char c
unsigned long flags;
u32 status;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
while (!altera_jtaguart_tx_space(port, &status)) {
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
if ((status & ALTERA_JTAGUART_CONTROL_AC_MSK) == 0) {
return; /* no connection activity */
}
cpu_relax();
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
}
writel(c, port->membase + ALTERA_JTAGUART_DATA_REG);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
#else
static void altera_jtaguart_console_putc(struct uart_port *port, unsigned char c)
{
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
while (!altera_jtaguart_tx_space(port, NULL)) {
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
cpu_relax();
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
}
writel(c, port->membase + ALTERA_JTAGUART_DATA_REG);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
#endif
--
2.45.2

121
buildroot-external/patches/linux/0041-serial-altera_uart-Use-port-lock-wrappers.patch
View File

@ -1,121 +0,0 @@
From e561202106a9b11c8921d7c0648d421c47d398ea Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:32 +0206
Subject: [PATCH 041/198] serial: altera_uart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-16-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/altera_uart.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c
index a9c41942190c..77835ac68df2 100644
--- a/drivers/tty/serial/altera_uart.c
+++ b/drivers/tty/serial/altera_uart.c
@@ -164,13 +164,13 @@ static void altera_uart_break_ctl(struct uart_port *port, int break_state)
struct altera_uart *pp = container_of(port, struct altera_uart, port);
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (break_state == -1)
pp->imr |= ALTERA_UART_CONTROL_TRBK_MSK;
else
pp->imr &= ~ALTERA_UART_CONTROL_TRBK_MSK;
altera_uart_update_ctrl_reg(pp);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void altera_uart_set_termios(struct uart_port *port,
@@ -187,10 +187,10 @@ static void altera_uart_set_termios(struct uart_port *port,
tty_termios_copy_hw(termios, old);
tty_termios_encode_baud_rate(termios, baud, baud);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
uart_update_timeout(port, termios->c_cflag, baud);
altera_uart_writel(port, baudclk, ALTERA_UART_DIVISOR_REG);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
/*
* FIXME: port->read_status_mask and port->ignore_status_mask
@@ -264,12 +264,12 @@ static irqreturn_t altera_uart_interrupt(int irq, void *data)
isr = altera_uart_readl(port, ALTERA_UART_STATUS_REG) & pp->imr;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (isr & ALTERA_UART_STATUS_RRDY_MSK)
altera_uart_rx_chars(port);
if (isr & ALTERA_UART_STATUS_TRDY_MSK)
altera_uart_tx_chars(port);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return IRQ_RETVAL(isr);
}
@@ -313,13 +313,13 @@ static int altera_uart_startup(struct uart_port *port)
}
}
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Enable RX interrupts now */
pp->imr = ALTERA_UART_CONTROL_RRDY_MSK;
altera_uart_update_ctrl_reg(pp);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return 0;
}
@@ -329,13 +329,13 @@ static void altera_uart_shutdown(struct uart_port *port)
struct altera_uart *pp = container_of(port, struct altera_uart, port);
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Disable all interrupts now */
pp->imr = 0;
altera_uart_update_ctrl_reg(pp);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
if (port->irq)
free_irq(port->irq, port);
--
2.45.2

117
buildroot-external/patches/linux/0042-serial-amba-pl010-Use-port-lock-wrappers.patch
View File

@ -1,117 +0,0 @@
From 7fec3009f5bfb2bd5fc6c0ac533fc1b9380a74c0 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:33 +0206
Subject: [PATCH 042/198] serial: amba-pl010: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-17-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/amba-pl010.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c
index b5a7404cbacb..eabbf8afc9b5 100644
--- a/drivers/tty/serial/amba-pl010.c
+++ b/drivers/tty/serial/amba-pl010.c
@@ -207,7 +207,7 @@ static irqreturn_t pl010_int(int irq, void *dev_id)
unsigned int status, pass_counter = AMBA_ISR_PASS_LIMIT;
int handled = 0;
- spin_lock(&port->lock);
+ uart_port_lock(port);
status = readb(port->membase + UART010_IIR);
if (status) {
@@ -228,7 +228,7 @@ static irqreturn_t pl010_int(int irq, void *dev_id)
handled = 1;
}
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return IRQ_RETVAL(handled);
}
@@ -270,14 +270,14 @@ static void pl010_break_ctl(struct uart_port *port, int break_state)
unsigned long flags;
unsigned int lcr_h;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
lcr_h = readb(port->membase + UART010_LCRH);
if (break_state == -1)
lcr_h |= UART01x_LCRH_BRK;
else
lcr_h &= ~UART01x_LCRH_BRK;
writel(lcr_h, port->membase + UART010_LCRH);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static int pl010_startup(struct uart_port *port)
@@ -385,7 +385,7 @@ pl010_set_termios(struct uart_port *port, struct ktermios *termios,
if (port->fifosize > 1)
lcr_h |= UART01x_LCRH_FEN;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/*
* Update the per-port timeout.
@@ -438,22 +438,22 @@ pl010_set_termios(struct uart_port *port, struct ktermios *termios,
writel(lcr_h, port->membase + UART010_LCRH);
writel(old_cr, port->membase + UART010_CR);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void pl010_set_ldisc(struct uart_port *port, struct ktermios *termios)
{
if (termios->c_line == N_PPS) {
port->flags |= UPF_HARDPPS_CD;
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
pl010_enable_ms(port);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
} else {
port->flags &= ~UPF_HARDPPS_CD;
if (!UART_ENABLE_MS(port, termios->c_cflag)) {
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
pl010_disable_ms(port);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
}
}
}
--
2.45.2

332
buildroot-external/patches/linux/0043-serial-amba-pl011-Use-port-lock-wrappers.patch
View File

@ -1,332 +0,0 @@
From 86a03026e71ac5627a00059c3447543f9236d5bf Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:34 +0206
Subject: [PATCH 043/198] serial: amba-pl011: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-18-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/amba-pl011.c | 72 ++++++++++++++++-----------------
1 file changed, 36 insertions(+), 36 deletions(-)
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 362bbcdece0d..16c770311069 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -347,9 +347,9 @@ static int pl011_fifo_to_tty(struct uart_amba_port *uap)
flag = TTY_FRAME;
}
- spin_unlock(&uap->port.lock);
+ uart_port_unlock(&uap->port);
sysrq = uart_handle_sysrq_char(&uap->port, ch & 255);
- spin_lock(&uap->port.lock);
+ uart_port_lock(&uap->port);
if (!sysrq)
uart_insert_char(&uap->port, ch, UART011_DR_OE, ch, flag);
@@ -544,7 +544,7 @@ static void pl011_dma_tx_callback(void *data)
unsigned long flags;
u16 dmacr;
- spin_lock_irqsave(&uap->port.lock, flags);
+ uart_port_lock_irqsave(&uap->port, &flags);
if (uap->dmatx.queued)
dma_unmap_single(dmatx->chan->device->dev, dmatx->dma,
dmatx->len, DMA_TO_DEVICE);
@@ -565,7 +565,7 @@ static void pl011_dma_tx_callback(void *data)
if (!(dmacr & UART011_TXDMAE) || uart_tx_stopped(&uap->port) ||
uart_circ_empty(&uap->port.state->xmit)) {
uap->dmatx.queued = false;
- spin_unlock_irqrestore(&uap->port.lock, flags);
+ uart_port_unlock_irqrestore(&uap->port, flags);
return;
}
@@ -576,7 +576,7 @@ static void pl011_dma_tx_callback(void *data)
*/
pl011_start_tx_pio(uap);
- spin_unlock_irqrestore(&uap->port.lock, flags);
+ uart_port_unlock_irqrestore(&uap->port, flags);
}
/*
@@ -1004,7 +1004,7 @@ static void pl011_dma_rx_callback(void *data)
* routine to flush out the secondary DMA buffer while
* we immediately trigger the next DMA job.
*/
- spin_lock_irq(&uap->port.lock);
+ uart_port_lock_irq(&uap->port);
/*
* Rx data can be taken by the UART interrupts during
* the DMA irq handler. So we check the residue here.
@@ -1020,7 +1020,7 @@ static void pl011_dma_rx_callback(void *data)
ret = pl011_dma_rx_trigger_dma(uap);
pl011_dma_rx_chars(uap, pending, lastbuf, false);
- spin_unlock_irq(&uap->port.lock);
+ uart_port_unlock_irq(&uap->port);
/*
* Do this check after we picked the DMA chars so we don't
* get some IRQ immediately from RX.
@@ -1086,11 +1086,11 @@ static void pl011_dma_rx_poll(struct timer_list *t)
if (jiffies_to_msecs(jiffies - dmarx->last_jiffies)
> uap->dmarx.poll_timeout) {
- spin_lock_irqsave(&uap->port.lock, flags);
+ uart_port_lock_irqsave(&uap->port, &flags);
pl011_dma_rx_stop(uap);
uap->im |= UART011_RXIM;
pl011_write(uap->im, uap, REG_IMSC);
- spin_unlock_irqrestore(&uap->port.lock, flags);
+ uart_port_unlock_irqrestore(&uap->port, flags);
uap->dmarx.running = false;
dmaengine_terminate_all(rxchan);
@@ -1186,10 +1186,10 @@ static void pl011_dma_shutdown(struct uart_amba_port *uap)
while (pl011_read(uap, REG_FR) & uap->vendor->fr_busy)
cpu_relax();
- spin_lock_irq(&uap->port.lock);
+ uart_port_lock_irq(&uap->port);
uap->dmacr &= ~(UART011_DMAONERR | UART011_RXDMAE | UART011_TXDMAE);
pl011_write(uap->dmacr, uap, REG_DMACR);
- spin_unlock_irq(&uap->port.lock);
+ uart_port_unlock_irq(&uap->port);
if (uap->using_tx_dma) {
/* In theory, this should already be done by pl011_dma_flush_buffer */
@@ -1400,9 +1400,9 @@ static void pl011_throttle_rx(struct uart_port *port)
{
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
pl011_stop_rx(port);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void pl011_enable_ms(struct uart_port *port)
@@ -1420,7 +1420,7 @@ __acquires(&uap->port.lock)
{
pl011_fifo_to_tty(uap);
- spin_unlock(&uap->port.lock);
+ uart_port_unlock(&uap->port);
tty_flip_buffer_push(&uap->port.state->port);
/*
* If we were temporarily out of DMA mode for a while,
@@ -1445,7 +1445,7 @@ __acquires(&uap->port.lock)
#endif
}
}
- spin_lock(&uap->port.lock);
+ uart_port_lock(&uap->port);
}
static bool pl011_tx_char(struct uart_amba_port *uap, unsigned char c,
@@ -1551,7 +1551,7 @@ static irqreturn_t pl011_int(int irq, void *dev_id)
unsigned int status, pass_counter = AMBA_ISR_PASS_LIMIT;
int handled = 0;
- spin_lock_irqsave(&uap->port.lock, flags);
+ uart_port_lock_irqsave(&uap->port, &flags);
status = pl011_read(uap, REG_RIS) & uap->im;
if (status) {
do {
@@ -1581,7 +1581,7 @@ static irqreturn_t pl011_int(int irq, void *dev_id)
handled = 1;
}
- spin_unlock_irqrestore(&uap->port.lock, flags);
+ uart_port_unlock_irqrestore(&uap->port, flags);
return IRQ_RETVAL(handled);
}
@@ -1653,14 +1653,14 @@ static void pl011_break_ctl(struct uart_port *port, int break_state)
unsigned long flags;
unsigned int lcr_h;
- spin_lock_irqsave(&uap->port.lock, flags);
+ uart_port_lock_irqsave(&uap->port, &flags);
lcr_h = pl011_read(uap, REG_LCRH_TX);
if (break_state == -1)
lcr_h |= UART01x_LCRH_BRK;
else
lcr_h &= ~UART01x_LCRH_BRK;
pl011_write(lcr_h, uap, REG_LCRH_TX);
- spin_unlock_irqrestore(&uap->port.lock, flags);
+ uart_port_unlock_irqrestore(&uap->port, flags);
}
#ifdef CONFIG_CONSOLE_POLL
@@ -1799,7 +1799,7 @@ static void pl011_enable_interrupts(struct uart_amba_port *uap)
unsigned long flags;
unsigned int i;
- spin_lock_irqsave(&uap->port.lock, flags);
+ uart_port_lock_irqsave(&uap->port, &flags);
/* Clear out any spuriously appearing RX interrupts */
pl011_write(UART011_RTIS | UART011_RXIS, uap, REG_ICR);
@@ -1821,7 +1821,7 @@ static void pl011_enable_interrupts(struct uart_amba_port *uap)
if (!pl011_dma_rx_running(uap))
uap->im |= UART011_RXIM;
pl011_write(uap->im, uap, REG_IMSC);
- spin_unlock_irqrestore(&uap->port.lock, flags);
+ uart_port_unlock_irqrestore(&uap->port, flags);
}
static void pl011_unthrottle_rx(struct uart_port *port)
@@ -1829,7 +1829,7 @@ static void pl011_unthrottle_rx(struct uart_port *port)
struct uart_amba_port *uap = container_of(port, struct uart_amba_port, port);
unsigned long flags;
- spin_lock_irqsave(&uap->port.lock, flags);
+ uart_port_lock_irqsave(&uap->port, &flags);
uap->im = UART011_RTIM;
if (!pl011_dma_rx_running(uap))
@@ -1837,7 +1837,7 @@ static void pl011_unthrottle_rx(struct uart_port *port)
pl011_write(uap->im, uap, REG_IMSC);
- spin_unlock_irqrestore(&uap->port.lock, flags);
+ uart_port_unlock_irqrestore(&uap->port, flags);
}
static int pl011_startup(struct uart_port *port)
@@ -1857,7 +1857,7 @@ static int pl011_startup(struct uart_port *port)
pl011_write(uap->vendor->ifls, uap, REG_IFLS);
- spin_lock_irq(&uap->port.lock);
+ uart_port_lock_irq(&uap->port);
cr = pl011_read(uap, REG_CR);
cr &= UART011_CR_RTS | UART011_CR_DTR;
@@ -1868,7 +1868,7 @@ static int pl011_startup(struct uart_port *port)
pl011_write(cr, uap, REG_CR);
- spin_unlock_irq(&uap->port.lock);
+ uart_port_unlock_irq(&uap->port);
/*
* initialise the old status of the modem signals
@@ -1929,12 +1929,12 @@ static void pl011_disable_uart(struct uart_amba_port *uap)
unsigned int cr;
uap->port.status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS);
- spin_lock_irq(&uap->port.lock);
+ uart_port_lock_irq(&uap->port);
cr = pl011_read(uap, REG_CR);
cr &= UART011_CR_RTS | UART011_CR_DTR;
cr |= UART01x_CR_UARTEN | UART011_CR_TXE;
pl011_write(cr, uap, REG_CR);
- spin_unlock_irq(&uap->port.lock);
+ uart_port_unlock_irq(&uap->port);
/*
* disable break condition and fifos
@@ -1946,14 +1946,14 @@ static void pl011_disable_uart(struct uart_amba_port *uap)
static void pl011_disable_interrupts(struct uart_amba_port *uap)
{
- spin_lock_irq(&uap->port.lock);
+ uart_port_lock_irq(&uap->port);
/* mask all interrupts and clear all pending ones */
uap->im = 0;
pl011_write(uap->im, uap, REG_IMSC);
pl011_write(0xffff, uap, REG_ICR);
- spin_unlock_irq(&uap->port.lock);
+ uart_port_unlock_irq(&uap->port);
}
static void pl011_shutdown(struct uart_port *port)
@@ -2098,7 +2098,7 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios,
bits = tty_get_frame_size(termios->c_cflag);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/*
* Update the per-port timeout.
@@ -2172,7 +2172,7 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios,
old_cr |= UART011_CR_RXE;
pl011_write(old_cr, uap, REG_CR);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void
@@ -2190,10 +2190,10 @@ sbsa_uart_set_termios(struct uart_port *port, struct ktermios *termios,
termios->c_cflag &= ~(CMSPAR | CRTSCTS);
termios->c_cflag |= CS8 | CLOCAL;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
uart_update_timeout(port, CS8, uap->fixed_baud);
pl011_setup_status_masks(port, termios);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *pl011_type(struct uart_port *port)
@@ -2332,9 +2332,9 @@ pl011_console_write(struct console *co, const char *s, unsigned int count)
if (uap->port.sysrq)
locked = 0;
else if (oops_in_progress)
- locked = spin_trylock(&uap->port.lock);
+ locked = uart_port_trylock(&uap->port);
else
- spin_lock(&uap->port.lock);
+ uart_port_lock(&uap->port);
/*
* First save the CR then disable the interrupts
@@ -2360,7 +2360,7 @@ pl011_console_write(struct console *co, const char *s, unsigned int count)
pl011_write(old_cr, uap, REG_CR);
if (locked)
- spin_unlock(&uap->port.lock);
+ uart_port_unlock(&uap->port);
local_irq_restore(flags);
clk_disable(uap->clk);
--
2.45.2

81
buildroot-external/patches/linux/0044-serial-apb-Use-port-lock-wrappers.patch
View File

@ -1,81 +0,0 @@
From 8e17c4e2574b46e536dbc23f1d70a5a9c5766c2e Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:35 +0206
Subject: [PATCH 044/198] serial: apb: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-19-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/apbuart.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/apbuart.c b/drivers/tty/serial/apbuart.c
index d3cb341f2c55..364599f256db 100644
--- a/drivers/tty/serial/apbuart.c
+++ b/drivers/tty/serial/apbuart.c
@@ -133,7 +133,7 @@ static irqreturn_t apbuart_int(int irq, void *dev_id)
struct uart_port *port = dev_id;
unsigned int status;
- spin_lock(&port->lock);
+ uart_port_lock(port);
status = UART_GET_STATUS(port);
if (status & UART_STATUS_DR)
@@ -141,7 +141,7 @@ static irqreturn_t apbuart_int(int irq, void *dev_id)
if (status & UART_STATUS_THE)
apbuart_tx_chars(port);
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return IRQ_HANDLED;
}
@@ -228,7 +228,7 @@ static void apbuart_set_termios(struct uart_port *port,
if (termios->c_cflag & CRTSCTS)
cr |= UART_CTRL_FL;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Update the per-port timeout. */
uart_update_timeout(port, termios->c_cflag, baud);
@@ -251,7 +251,7 @@ static void apbuart_set_termios(struct uart_port *port,
UART_PUT_SCAL(port, quot);
UART_PUT_CTRL(port, cr);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *apbuart_type(struct uart_port *port)
--
2.45.2

149
buildroot-external/patches/linux/0045-serial-ar933x-Use-port-lock-wrappers.patch
View File

@ -1,149 +0,0 @@
From c8c0b524a6198b950edcc01008dbe59c428a8fcb Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:36 +0206
Subject: [PATCH 045/198] serial: ar933x: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-20-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/ar933x_uart.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
index 924c1a89347c..ffd234673177 100644
--- a/drivers/tty/serial/ar933x_uart.c
+++ b/drivers/tty/serial/ar933x_uart.c
@@ -133,9 +133,9 @@ static unsigned int ar933x_uart_tx_empty(struct uart_port *port)
unsigned long flags;
unsigned int rdata;
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
rdata = ar933x_uart_read(up, AR933X_UART_DATA_REG);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
return (rdata & AR933X_UART_DATA_TX_CSR) ? 0 : TIOCSER_TEMT;
}
@@ -220,14 +220,14 @@ static void ar933x_uart_break_ctl(struct uart_port *port, int break_state)
container_of(port, struct ar933x_uart_port, port);
unsigned long flags;
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
if (break_state == -1)
ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
AR933X_UART_CS_TX_BREAK);
else
ar933x_uart_rmw_clear(up, AR933X_UART_CS_REG,
AR933X_UART_CS_TX_BREAK);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
/*
@@ -318,7 +318,7 @@ static void ar933x_uart_set_termios(struct uart_port *port,
* Ok, we're now changing the port state. Do it with
* interrupts disabled.
*/
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
/* disable the UART */
ar933x_uart_rmw_clear(up, AR933X_UART_CS_REG,
@@ -352,7 +352,7 @@ static void ar933x_uart_set_termios(struct uart_port *port,
AR933X_UART_CS_IF_MODE_M << AR933X_UART_CS_IF_MODE_S,
AR933X_UART_CS_IF_MODE_DCE << AR933X_UART_CS_IF_MODE_S);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
if (tty_termios_baud_rate(new))
tty_termios_encode_baud_rate(new, baud, baud);
@@ -450,7 +450,7 @@ static irqreturn_t ar933x_uart_interrupt(int irq, void *dev_id)
if ((status & AR933X_UART_CS_HOST_INT) == 0)
return IRQ_NONE;
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
status = ar933x_uart_read(up, AR933X_UART_INT_REG);
status &= ar933x_uart_read(up, AR933X_UART_INT_EN_REG);
@@ -468,7 +468,7 @@ static irqreturn_t ar933x_uart_interrupt(int irq, void *dev_id)
ar933x_uart_tx_chars(up);
}
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
return IRQ_HANDLED;
}
@@ -485,7 +485,7 @@ static int ar933x_uart_startup(struct uart_port *port)
if (ret)
return ret;
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
/* Enable HOST interrupts */
ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
@@ -498,7 +498,7 @@ static int ar933x_uart_startup(struct uart_port *port)
/* Enable RX interrupts */
ar933x_uart_start_rx_interrupt(up);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
return 0;
}
@@ -632,9 +632,9 @@ static void ar933x_uart_console_write(struct console *co, const char *s,
if (up->port.sysrq)
locked = 0;
else if (oops_in_progress)
- locked = spin_trylock(&up->port.lock);
+ locked = uart_port_trylock(&up->port);
else
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
/*
* First save the IER then disable the interrupts
@@ -654,7 +654,7 @@ static void ar933x_uart_console_write(struct console *co, const char *s,
ar933x_uart_write(up, AR933X_UART_INT_REG, AR933X_UART_INT_ALLINTS);
if (locked)
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
local_irq_restore(flags);
}
--
2.45.2

102
buildroot-external/patches/linux/0046-serial-arc_uart-Use-port-lock-wrappers.patch
View File

@ -1,102 +0,0 @@
From b902f0c9ca0f4234552215a4b8fbb6b0cd274aa4 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:37 +0206
Subject: [PATCH 046/198] serial: arc_uart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-21-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/arc_uart.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c
index ad4ae19b6ce3..1aa5b2b49c26 100644
--- a/drivers/tty/serial/arc_uart.c
+++ b/drivers/tty/serial/arc_uart.c
@@ -279,9 +279,9 @@ static irqreturn_t arc_serial_isr(int irq, void *dev_id)
if (status & RXIENB) {
/* already in ISR, no need of xx_irqsave */
- spin_lock(&port->lock);
+ uart_port_lock(port);
arc_serial_rx_chars(port, status);
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
}
if ((status & TXIENB) && (status & TXEMPTY)) {
@@ -291,12 +291,12 @@ static irqreturn_t arc_serial_isr(int irq, void *dev_id)
*/
UART_TX_IRQ_DISABLE(port);
- spin_lock(&port->lock);
+ uart_port_lock(port);
if (!uart_tx_stopped(port))
arc_serial_tx_chars(port);
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
}
return IRQ_HANDLED;
@@ -366,7 +366,7 @@ arc_serial_set_termios(struct uart_port *port, struct ktermios *new,
uartl = hw_val & 0xFF;
uarth = (hw_val >> 8) & 0xFF;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
UART_ALL_IRQ_DISABLE(port);
@@ -391,7 +391,7 @@ arc_serial_set_termios(struct uart_port *port, struct ktermios *new,
uart_update_timeout(port, new->c_cflag, baud);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *arc_serial_type(struct uart_port *port)
@@ -521,9 +521,9 @@ static void arc_serial_console_write(struct console *co, const char *s,
struct uart_port *port = &arc_uart_ports[co->index].port;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
uart_console_write(port, s, count, arc_serial_console_putchar);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static struct console arc_console = {
--
2.45.2

124
buildroot-external/patches/linux/0047-serial-atmel-Use-port-lock-wrappers.patch
View File

@ -1,124 +0,0 @@
From 325c2f842f06aba6dae0545aa1ab36105ef14ebe Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:38 +0206
Subject: [PATCH 047/198] serial: atmel: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-22-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/atmel_serial.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 88cdafa5ac54..1946fafc3f3e 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -861,7 +861,7 @@ static void atmel_complete_tx_dma(void *arg)
struct dma_chan *chan = atmel_port->chan_tx;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (chan)
dmaengine_terminate_all(chan);
@@ -893,7 +893,7 @@ static void atmel_complete_tx_dma(void *arg)
atmel_port->tx_done_mask);
}
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void atmel_release_tx_dma(struct uart_port *port)
@@ -1711,9 +1711,9 @@ static void atmel_tasklet_rx_func(struct tasklet_struct *t)
struct uart_port *port = &atmel_port->uart;
/* The interrupt handler does not take the lock */
- spin_lock(&port->lock);
+ uart_port_lock(port);
atmel_port->schedule_rx(port);
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
}
static void atmel_tasklet_tx_func(struct tasklet_struct *t)
@@ -1723,9 +1723,9 @@ static void atmel_tasklet_tx_func(struct tasklet_struct *t)
struct uart_port *port = &atmel_port->uart;
/* The interrupt handler does not take the lock */
- spin_lock(&port->lock);
+ uart_port_lock(port);
atmel_port->schedule_tx(port);
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
}
static void atmel_init_property(struct atmel_uart_port *atmel_port,
@@ -2175,7 +2175,7 @@ static void atmel_set_termios(struct uart_port *port,
} else
mode |= ATMEL_US_PAR_NONE;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
port->read_status_mask = ATMEL_US_OVRE;
if (termios->c_iflag & INPCK)
@@ -2377,22 +2377,22 @@ static void atmel_set_termios(struct uart_port *port,
else
atmel_disable_ms(port);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void atmel_set_ldisc(struct uart_port *port, struct ktermios *termios)
{
if (termios->c_line == N_PPS) {
port->flags |= UPF_HARDPPS_CD;
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
atmel_enable_ms(port);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
} else {
port->flags &= ~UPF_HARDPPS_CD;
if (!UART_ENABLE_MS(port, termios->c_cflag)) {
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
atmel_disable_ms(port);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
}
}
}
--
2.45.2

133
buildroot-external/patches/linux/0048-serial-bcm63xx-uart-Use-port-lock-wrappers.patch
View File

@ -1,133 +0,0 @@
From d2f045ac943207d02e3cb9bd374f3c5d35c13c15 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:39 +0206
Subject: [PATCH 048/198] serial: bcm63xx-uart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-23-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/bcm63xx_uart.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c
index 44c27e5cefbc..b104c36ce5c0 100644
--- a/drivers/tty/serial/bcm63xx_uart.c
+++ b/drivers/tty/serial/bcm63xx_uart.c
@@ -201,7 +201,7 @@ static void bcm_uart_break_ctl(struct uart_port *port, int ctl)
unsigned long flags;
unsigned int val;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
val = bcm_uart_readl(port, UART_CTL_REG);
if (ctl)
@@ -210,7 +210,7 @@ static void bcm_uart_break_ctl(struct uart_port *port, int ctl)
val &= ~UART_CTL_XMITBRK_MASK;
bcm_uart_writel(port, val, UART_CTL_REG);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
/*
@@ -335,7 +335,7 @@ static irqreturn_t bcm_uart_interrupt(int irq, void *dev_id)
unsigned int irqstat;
port = dev_id;
- spin_lock(&port->lock);
+ uart_port_lock(port);
irqstat = bcm_uart_readl(port, UART_IR_REG);
if (irqstat & UART_RX_INT_STAT)
@@ -356,7 +356,7 @@ static irqreturn_t bcm_uart_interrupt(int irq, void *dev_id)
estat & UART_EXTINP_DCD_MASK);
}
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return IRQ_HANDLED;
}
@@ -454,9 +454,9 @@ static void bcm_uart_shutdown(struct uart_port *port)
{
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
bcm_uart_writel(port, 0, UART_IR_REG);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
bcm_uart_disable(port);
bcm_uart_flush(port);
@@ -473,7 +473,7 @@ static void bcm_uart_set_termios(struct uart_port *port, struct ktermios *new,
unsigned long flags;
int tries;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Drain the hot tub fully before we power it off for the winter. */
for (tries = 3; !bcm_uart_tx_empty(port) && tries; tries--)
@@ -549,7 +549,7 @@ static void bcm_uart_set_termios(struct uart_port *port, struct ktermios *new,
uart_update_timeout(port, new->c_cflag, baud);
bcm_uart_enable(port);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
/*
@@ -715,9 +715,9 @@ static void bcm_console_write(struct console *co, const char *s,
/* bcm_uart_interrupt() already took the lock */
locked = 0;
} else if (oops_in_progress) {
- locked = spin_trylock(&port->lock);
+ locked = uart_port_trylock(port);
} else {
- spin_lock(&port->lock);
+ uart_port_lock(port);
locked = 1;
}
@@ -728,7 +728,7 @@ static void bcm_console_write(struct console *co, const char *s,
wait_for_xmitr(port);
if (locked)
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
local_irq_restore(flags);
}
--
2.45.2

75
buildroot-external/patches/linux/0049-serial-cpm_uart-Use-port-lock-wrappers.patch
View File

@ -1,75 +0,0 @@
From d589f5c720e72cb067f0d9d09f1acbd6b6e9f6aa Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:40 +0206
Subject: [PATCH 049/198] serial: cpm_uart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-24-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/cpm_uart.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/cpm_uart.c b/drivers/tty/serial/cpm_uart.c
index 626423022d62..be4af6eda4c2 100644
--- a/drivers/tty/serial/cpm_uart.c
+++ b/drivers/tty/serial/cpm_uart.c
@@ -569,7 +569,7 @@ static void cpm_uart_set_termios(struct uart_port *port,
if ((termios->c_cflag & CREAD) == 0)
port->read_status_mask &= ~BD_SC_EMPTY;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (IS_SMC(pinfo)) {
unsigned int bits = tty_get_frame_size(termios->c_cflag);
@@ -609,7 +609,7 @@ static void cpm_uart_set_termios(struct uart_port *port,
clk_set_rate(pinfo->clk, baud);
else
cpm_setbrg(pinfo->brg - 1, baud);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *cpm_uart_type(struct uart_port *port)
@@ -1386,9 +1386,9 @@ static void cpm_uart_console_write(struct console *co, const char *s,
cpm_uart_early_write(pinfo, s, count, true);
local_irq_restore(flags);
} else {
- spin_lock_irqsave(&pinfo->port.lock, flags);
+ uart_port_lock_irqsave(&pinfo->port, &flags);
cpm_uart_early_write(pinfo, s, count, true);
- spin_unlock_irqrestore(&pinfo->port.lock, flags);
+ uart_port_unlock_irqrestore(&pinfo->port, flags);
}
}
--
2.45.2

118
buildroot-external/patches/linux/0050-serial-digicolor-Use-port-lock-wrappers.patch
View File

@ -1,118 +0,0 @@
From 849f46281c4b845ae40e39ef82ec0fa3a6ac729d Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:41 +0206
Subject: [PATCH 050/198] serial: digicolor: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-25-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/digicolor-usart.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/tty/serial/digicolor-usart.c b/drivers/tty/serial/digicolor-usart.c
index 128b5479e813..5004125f3045 100644
--- a/drivers/tty/serial/digicolor-usart.c
+++ b/drivers/tty/serial/digicolor-usart.c
@@ -133,7 +133,7 @@ static void digicolor_uart_rx(struct uart_port *port)
{
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
while (1) {
u8 status, ch, ch_flag;
@@ -172,7 +172,7 @@ static void digicolor_uart_rx(struct uart_port *port)
ch_flag);
}
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
tty_flip_buffer_push(&port->state->port);
}
@@ -185,7 +185,7 @@ static void digicolor_uart_tx(struct uart_port *port)
if (digicolor_uart_tx_full(port))
return;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (port->x_char) {
writeb_relaxed(port->x_char, port->membase + UA_EMI_REC);
@@ -211,7 +211,7 @@ static void digicolor_uart_tx(struct uart_port *port)
uart_write_wakeup(port);
out:
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static irqreturn_t digicolor_uart_int(int irq, void *dev_id)
@@ -333,7 +333,7 @@ static void digicolor_uart_set_termios(struct uart_port *port,
port->ignore_status_mask |= UA_STATUS_OVERRUN_ERR
| UA_STATUS_PARITY_ERR | UA_STATUS_FRAME_ERR;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
uart_update_timeout(port, termios->c_cflag, baud);
@@ -341,7 +341,7 @@ static void digicolor_uart_set_termios(struct uart_port *port,
writeb_relaxed(divisor & 0xff, port->membase + UA_HBAUD_LO);
writeb_relaxed(divisor >> 8, port->membase + UA_HBAUD_HI);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *digicolor_uart_type(struct uart_port *port)
@@ -398,14 +398,14 @@ static void digicolor_uart_console_write(struct console *co, const char *c,
int locked = 1;
if (oops_in_progress)
- locked = spin_trylock_irqsave(&port->lock, flags);
+ locked = uart_port_trylock_irqsave(port, &flags);
else
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
uart_console_write(port, c, n, digicolor_uart_console_putchar);
if (locked)
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
/* Wait for transmitter to become empty */
do {
--
2.45.2

166
buildroot-external/patches/linux/0051-serial-dz-Use-port-lock-wrappers.patch
View File

@ -1,166 +0,0 @@
From cf56a8cb4d23d06dc03a323a09d0ce29cf806ee9 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:42 +0206
Subject: [PATCH 051/198] serial: dz: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-26-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/dz.c | 32 ++++++++++++++++----------------
1 file changed, 16 insertions(+), 16 deletions(-)
diff --git a/drivers/tty/serial/dz.c b/drivers/tty/serial/dz.c
index 667f52e83277..6df7af9edc1c 100644
--- a/drivers/tty/serial/dz.c
+++ b/drivers/tty/serial/dz.c
@@ -268,9 +268,9 @@ static inline void dz_transmit_chars(struct dz_mux *mux)
}
/* If nothing to do or stopped or hardware stopped. */
if (uart_circ_empty(xmit) || uart_tx_stopped(&dport->port)) {
- spin_lock(&dport->port.lock);
+ uart_port_lock(&dport->port);
dz_stop_tx(&dport->port);
- spin_unlock(&dport->port.lock);
+ uart_port_unlock(&dport->port);
return;
}
@@ -287,9 +287,9 @@ static inline void dz_transmit_chars(struct dz_mux *mux)
/* Are we are done. */
if (uart_circ_empty(xmit)) {
- spin_lock(&dport->port.lock);
+ uart_port_lock(&dport->port);
dz_stop_tx(&dport->port);
- spin_unlock(&dport->port.lock);
+ uart_port_unlock(&dport->port);
}
}
@@ -415,14 +415,14 @@ static int dz_startup(struct uart_port *uport)
return ret;
}
- spin_lock_irqsave(&dport->port.lock, flags);
+ uart_port_lock_irqsave(&dport->port, &flags);
/* Enable interrupts. */
tmp = dz_in(dport, DZ_CSR);
tmp |= DZ_RIE | DZ_TIE;
dz_out(dport, DZ_CSR, tmp);
- spin_unlock_irqrestore(&dport->port.lock, flags);
+ uart_port_unlock_irqrestore(&dport->port, flags);
return 0;
}
@@ -443,9 +443,9 @@ static void dz_shutdown(struct uart_port *uport)
int irq_guard;
u16 tmp;
- spin_lock_irqsave(&dport->port.lock, flags);
+ uart_port_lock_irqsave(&dport->port, &flags);
dz_stop_tx(&dport->port);
- spin_unlock_irqrestore(&dport->port.lock, flags);
+ uart_port_unlock_irqrestore(&dport->port, flags);
irq_guard = atomic_add_return(-1, &mux->irq_guard);
if (!irq_guard) {
@@ -491,14 +491,14 @@ static void dz_break_ctl(struct uart_port *uport, int break_state)
unsigned long flags;
unsigned short tmp, mask = 1 << dport->port.line;
- spin_lock_irqsave(&uport->lock, flags);
+ uart_port_lock_irqsave(uport, &flags);
tmp = dz_in(dport, DZ_TCR);
if (break_state)
tmp |= mask;
else
tmp &= ~mask;
dz_out(dport, DZ_TCR, tmp);
- spin_unlock_irqrestore(&uport->lock, flags);
+ uart_port_unlock_irqrestore(uport, flags);
}
static int dz_encode_baud_rate(unsigned int baud)
@@ -608,7 +608,7 @@ static void dz_set_termios(struct uart_port *uport, struct ktermios *termios,
if (termios->c_cflag & CREAD)
cflag |= DZ_RXENAB;
- spin_lock_irqsave(&dport->port.lock, flags);
+ uart_port_lock_irqsave(&dport->port, &flags);
uart_update_timeout(uport, termios->c_cflag, baud);
@@ -631,7 +631,7 @@ static void dz_set_termios(struct uart_port *uport, struct ktermios *termios,
if (termios->c_iflag & IGNBRK)
dport->port.ignore_status_mask |= DZ_BREAK;
- spin_unlock_irqrestore(&dport->port.lock, flags);
+ uart_port_unlock_irqrestore(&dport->port, flags);
}
/*
@@ -645,12 +645,12 @@ static void dz_pm(struct uart_port *uport, unsigned int state,
struct dz_port *dport = to_dport(uport);
unsigned long flags;
- spin_lock_irqsave(&dport->port.lock, flags);
+ uart_port_lock_irqsave(&dport->port, &flags);
if (state < 3)
dz_start_tx(&dport->port);
else
dz_stop_tx(&dport->port);
- spin_unlock_irqrestore(&dport->port.lock, flags);
+ uart_port_unlock_irqrestore(&dport->port, flags);
}
@@ -811,7 +811,7 @@ static void dz_console_putchar(struct uart_port *uport, unsigned char ch)
unsigned short csr, tcr, trdy, mask;
int loops = 10000;
- spin_lock_irqsave(&dport->port.lock, flags);
+ uart_port_lock_irqsave(&dport->port, &flags);
csr = dz_in(dport, DZ_CSR);
dz_out(dport, DZ_CSR, csr & ~DZ_TIE);
tcr = dz_in(dport, DZ_TCR);
@@ -819,7 +819,7 @@ static void dz_console_putchar(struct uart_port *uport, unsigned char ch)
mask = tcr;
dz_out(dport, DZ_TCR, mask);
iob();
- spin_unlock_irqrestore(&dport->port.lock, flags);
+ uart_port_unlock_irqrestore(&dport->port, flags);
do {
trdy = dz_in(dport, DZ_CSR);
--
2.45.2

148
buildroot-external/patches/linux/0052-serial-linflexuart-Use-port-lock-wrappers.patch
View File

@ -1,148 +0,0 @@
From f9ed3526fbe17a03c3c9a551b1fdb89743033881 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:43 +0206
Subject: [PATCH 052/198] serial: linflexuart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-27-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/fsl_linflexuart.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/drivers/tty/serial/fsl_linflexuart.c b/drivers/tty/serial/fsl_linflexuart.c
index 249cb380c3c6..7fa809a405e8 100644
--- a/drivers/tty/serial/fsl_linflexuart.c
+++ b/drivers/tty/serial/fsl_linflexuart.c
@@ -203,7 +203,7 @@ static irqreturn_t linflex_txint(int irq, void *dev_id)
struct circ_buf *xmit = &sport->state->xmit;
unsigned long flags;
- spin_lock_irqsave(&sport->lock, flags);
+ uart_port_lock_irqsave(sport, &flags);
if (sport->x_char) {
linflex_put_char(sport, sport->x_char);
@@ -217,7 +217,7 @@ static irqreturn_t linflex_txint(int irq, void *dev_id)
linflex_transmit_buffer(sport);
out:
- spin_unlock_irqrestore(&sport->lock, flags);
+ uart_port_unlock_irqrestore(sport, flags);
return IRQ_HANDLED;
}
@@ -230,7 +230,7 @@ static irqreturn_t linflex_rxint(int irq, void *dev_id)
unsigned char rx;
bool brk;
- spin_lock_irqsave(&sport->lock, flags);
+ uart_port_lock_irqsave(sport, &flags);
status = readl(sport->membase + UARTSR);
while (status & LINFLEXD_UARTSR_RMB) {
@@ -266,7 +266,7 @@ static irqreturn_t linflex_rxint(int irq, void *dev_id)
}
}
- spin_unlock_irqrestore(&sport->lock, flags);
+ uart_port_unlock_irqrestore(sport, flags);
tty_flip_buffer_push(port);
@@ -369,11 +369,11 @@ static int linflex_startup(struct uart_port *port)
int ret = 0;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
linflex_setup_watermark(port);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
ret = devm_request_irq(port->dev, port->irq, linflex_int, 0,
DRIVER_NAME, port);
@@ -386,14 +386,14 @@ static void linflex_shutdown(struct uart_port *port)
unsigned long ier;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* disable interrupts */
ier = readl(port->membase + LINIER);
ier &= ~(LINFLEXD_LINIER_DRIE | LINFLEXD_LINIER_DTIE);
writel(ier, port->membase + LINIER);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
devm_free_irq(port->dev, port->irq, port);
}
@@ -474,7 +474,7 @@ linflex_set_termios(struct uart_port *port, struct ktermios *termios,
cr &= ~LINFLEXD_UARTCR_PCE;
}
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
port->read_status_mask = 0;
@@ -507,7 +507,7 @@ linflex_set_termios(struct uart_port *port, struct ktermios *termios,
writel(cr1, port->membase + LINCR1);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *linflex_type(struct uart_port *port)
@@ -646,14 +646,14 @@ linflex_console_write(struct console *co, const char *s, unsigned int count)
if (sport->sysrq)
locked = 0;
else if (oops_in_progress)
- locked = spin_trylock_irqsave(&sport->lock, flags);
+ locked = uart_port_trylock_irqsave(sport, &flags);
else
- spin_lock_irqsave(&sport->lock, flags);
+ uart_port_lock_irqsave(sport, &flags);
linflex_string_write(sport, s, count);
if (locked)
- spin_unlock_irqrestore(&sport->lock, flags);
+ uart_port_unlock_irqrestore(sport, flags);
}
/*
--
2.45.2

394
buildroot-external/patches/linux/0053-serial-fsl_lpuart-Use-port-lock-wrappers.patch
View File

@ -1,394 +0,0 @@
From ad1a88864ae88125ba21aee17d8cf3352afec096 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:44 +0206
Subject: [PATCH 053/198] serial: fsl_lpuart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-28-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/fsl_lpuart.c | 88 ++++++++++++++++-----------------
1 file changed, 44 insertions(+), 44 deletions(-)
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 385b41275e8b..71d0cbd74807 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -532,9 +532,9 @@ static void lpuart_dma_tx_complete(void *arg)
struct dma_chan *chan = sport->dma_tx_chan;
unsigned long flags;
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
if (!sport->dma_tx_in_progress) {
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
return;
}
@@ -543,7 +543,7 @@ static void lpuart_dma_tx_complete(void *arg)
uart_xmit_advance(&sport->port, sport->dma_tx_bytes);
sport->dma_tx_in_progress = false;
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(&sport->port);
@@ -553,12 +553,12 @@ static void lpuart_dma_tx_complete(void *arg)
return;
}
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
if (!lpuart_stopped_or_empty(&sport->port))
lpuart_dma_tx(sport);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
static dma_addr_t lpuart_dma_datareg_addr(struct lpuart_port *sport)
@@ -651,7 +651,7 @@ static int lpuart_poll_init(struct uart_port *port)
sport->port.fifosize = 0;
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
/* Disable Rx & Tx */
writeb(0, sport->port.membase + UARTCR2);
@@ -675,7 +675,7 @@ static int lpuart_poll_init(struct uart_port *port)
/* Enable Rx and Tx */
writeb(UARTCR2_RE | UARTCR2_TE, sport->port.membase + UARTCR2);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
return 0;
}
@@ -703,7 +703,7 @@ static int lpuart32_poll_init(struct uart_port *port)
sport->port.fifosize = 0;
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
/* Disable Rx & Tx */
lpuart32_write(&sport->port, 0, UARTCTRL);
@@ -724,7 +724,7 @@ static int lpuart32_poll_init(struct uart_port *port)
/* Enable Rx and Tx */
lpuart32_write(&sport->port, UARTCTRL_RE | UARTCTRL_TE, UARTCTRL);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
return 0;
}
@@ -879,9 +879,9 @@ static unsigned int lpuart32_tx_empty(struct uart_port *port)
static void lpuart_txint(struct lpuart_port *sport)
{
- spin_lock(&sport->port.lock);
+ uart_port_lock(&sport->port);
lpuart_transmit_buffer(sport);
- spin_unlock(&sport->port.lock);
+ uart_port_unlock(&sport->port);
}
static void lpuart_rxint(struct lpuart_port *sport)
@@ -890,7 +890,7 @@ static void lpuart_rxint(struct lpuart_port *sport)
struct tty_port *port = &sport->port.state->port;
unsigned char rx, sr;
- spin_lock(&sport->port.lock);
+ uart_port_lock(&sport->port);
while (!(readb(sport->port.membase + UARTSFIFO) & UARTSFIFO_RXEMPT)) {
flg = TTY_NORMAL;
@@ -956,9 +956,9 @@ static void lpuart_rxint(struct lpuart_port *sport)
static void lpuart32_txint(struct lpuart_port *sport)
{
- spin_lock(&sport->port.lock);
+ uart_port_lock(&sport->port);
lpuart32_transmit_buffer(sport);
- spin_unlock(&sport->port.lock);
+ uart_port_unlock(&sport->port);
}
static void lpuart32_rxint(struct lpuart_port *sport)
@@ -968,7 +968,7 @@ static void lpuart32_rxint(struct lpuart_port *sport)
unsigned long rx, sr;
bool is_break;
- spin_lock(&sport->port.lock);
+ uart_port_lock(&sport->port);
while (!(lpuart32_read(&sport->port, UARTFIFO) & UARTFIFO_RXEMPT)) {
flg = TTY_NORMAL;
@@ -1170,12 +1170,12 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port *sport)
async_tx_ack(sport->dma_rx_desc);
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
dmastat = dmaengine_tx_status(chan, sport->dma_rx_cookie, &state);
if (dmastat == DMA_ERROR) {
dev_err(sport->port.dev, "Rx DMA transfer failed!\n");
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
return;
}
@@ -1244,7 +1244,7 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port *sport)
dma_sync_sg_for_device(chan->device->dev, &sport->rx_sgl, 1,
DMA_FROM_DEVICE);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
tty_flip_buffer_push(port);
if (!sport->dma_idle_int)
@@ -1335,9 +1335,9 @@ static void lpuart_timer_func(struct timer_list *t)
mod_timer(&sport->lpuart_timer,
jiffies + sport->dma_rx_timeout);
- if (spin_trylock_irqsave(&sport->port.lock, flags)) {
+ if (uart_port_trylock_irqsave(&sport->port, &flags)) {
sport->last_residue = state.residue;
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
}
@@ -1802,14 +1802,14 @@ static void lpuart_hw_setup(struct lpuart_port *sport)
{
unsigned long flags;
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
lpuart_setup_watermark_enable(sport);
lpuart_rx_dma_startup(sport);
lpuart_tx_dma_startup(sport);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
static int lpuart_startup(struct uart_port *port)
@@ -1859,7 +1859,7 @@ static void lpuart32_hw_setup(struct lpuart_port *sport)
{
unsigned long flags;
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
lpuart32_hw_disable(sport);
@@ -1869,7 +1869,7 @@ static void lpuart32_hw_setup(struct lpuart_port *sport)
lpuart32_setup_watermark_enable(sport);
lpuart32_configure(sport);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
static int lpuart32_startup(struct uart_port *port)
@@ -1932,7 +1932,7 @@ static void lpuart_shutdown(struct uart_port *port)
unsigned char temp;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* disable Rx/Tx and interrupts */
temp = readb(port->membase + UARTCR2);
@@ -1940,7 +1940,7 @@ static void lpuart_shutdown(struct uart_port *port)
UARTCR2_TIE | UARTCR2_TCIE | UARTCR2_RIE);
writeb(temp, port->membase + UARTCR2);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
lpuart_dma_shutdown(sport);
}
@@ -1952,7 +1952,7 @@ static void lpuart32_shutdown(struct uart_port *port)
unsigned long temp;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* clear status */
temp = lpuart32_read(&sport->port, UARTSTAT);
@@ -1969,7 +1969,7 @@ static void lpuart32_shutdown(struct uart_port *port)
UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_RIE | UARTCTRL_SBK);
lpuart32_write(port, temp, UARTCTRL);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
lpuart_dma_shutdown(sport);
}
@@ -2069,7 +2069,7 @@ lpuart_set_termios(struct uart_port *port, struct ktermios *termios,
if (old && sport->lpuart_dma_rx_use)
lpuart_dma_rx_free(&sport->port);
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
sport->port.read_status_mask = 0;
if (termios->c_iflag & INPCK)
@@ -2124,7 +2124,7 @@ lpuart_set_termios(struct uart_port *port, struct ktermios *termios,
sport->lpuart_dma_rx_use = false;
}
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
static void __lpuart32_serial_setbrg(struct uart_port *port,
@@ -2304,7 +2304,7 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
if (old && sport->lpuart_dma_rx_use)
lpuart_dma_rx_free(&sport->port);
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
sport->port.read_status_mask = 0;
if (termios->c_iflag & INPCK)
@@ -2362,7 +2362,7 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
sport->lpuart_dma_rx_use = false;
}
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
static const char *lpuart_type(struct uart_port *port)
@@ -2480,9 +2480,9 @@ lpuart_console_write(struct console *co, const char *s, unsigned int count)
int locked = 1;
if (oops_in_progress)
- locked = spin_trylock_irqsave(&sport->port.lock, flags);
+ locked = uart_port_trylock_irqsave(&sport->port, &flags);
else
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
/* first save CR2 and then disable interrupts */
cr2 = old_cr2 = readb(sport->port.membase + UARTCR2);
@@ -2498,7 +2498,7 @@ lpuart_console_write(struct console *co, const char *s, unsigned int count)
writeb(old_cr2, sport->port.membase + UARTCR2);
if (locked)
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
static void
@@ -2510,9 +2510,9 @@ lpuart32_console_write(struct console *co, const char *s, unsigned int count)
int locked = 1;
if (oops_in_progress)
- locked = spin_trylock_irqsave(&sport->port.lock, flags);
+ locked = uart_port_trylock_irqsave(&sport->port, &flags);
else
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
/* first save CR2 and then disable interrupts */
cr = old_cr = lpuart32_read(&sport->port, UARTCTRL);
@@ -2528,7 +2528,7 @@ lpuart32_console_write(struct console *co, const char *s, unsigned int count)
lpuart32_write(&sport->port, old_cr, UARTCTRL);
if (locked)
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
/*
@@ -3092,7 +3092,7 @@ static int lpuart_suspend(struct device *dev)
uart_suspend_port(&lpuart_reg, &sport->port);
if (lpuart_uport_is_active(sport)) {
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
if (lpuart_is_32(sport)) {
/* disable Rx/Tx and interrupts */
temp = lpuart32_read(&sport->port, UARTCTRL);
@@ -3104,7 +3104,7 @@ static int lpuart_suspend(struct device *dev)
temp &= ~(UARTCR2_TE | UARTCR2_TIE | UARTCR2_TCIE);
writeb(temp, sport->port.membase + UARTCR2);
}
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
if (sport->lpuart_dma_rx_use) {
/*
@@ -3117,7 +3117,7 @@ static int lpuart_suspend(struct device *dev)
lpuart_dma_rx_free(&sport->port);
/* Disable Rx DMA to use UART port as wakeup source */
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
if (lpuart_is_32(sport)) {
temp = lpuart32_read(&sport->port, UARTBAUD);
lpuart32_write(&sport->port, temp & ~UARTBAUD_RDMAE,
@@ -3126,11 +3126,11 @@ static int lpuart_suspend(struct device *dev)
writeb(readb(sport->port.membase + UARTCR5) &
~UARTCR5_RDMAS, sport->port.membase + UARTCR5);
}
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
if (sport->lpuart_dma_tx_use) {
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
if (lpuart_is_32(sport)) {
temp = lpuart32_read(&sport->port, UARTBAUD);
temp &= ~UARTBAUD_TDMAE;
@@ -3140,7 +3140,7 @@ static int lpuart_suspend(struct device *dev)
temp &= ~UARTCR5_TDMAS;
writeb(temp, sport->port.membase + UARTCR5);
}
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
sport->dma_tx_in_progress = false;
dmaengine_terminate_sync(sport->dma_tx_chan);
}
--
2.45.2

156
buildroot-external/patches/linux/0054-serial-icom-Use-port-lock-wrappers.patch
View File

@ -1,156 +0,0 @@
From 23d144bb0f021b6b20003b42bb1dfdcd301cf755 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:45 +0206
Subject: [PATCH 054/198] serial: icom: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-29-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/icom.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/drivers/tty/serial/icom.c b/drivers/tty/serial/icom.c
index 819f957b6b84..a75eafbcbea3 100644
--- a/drivers/tty/serial/icom.c
+++ b/drivers/tty/serial/icom.c
@@ -929,7 +929,7 @@ static inline void check_modem_status(struct icom_port *icom_port)
char delta_status;
unsigned char status;
- spin_lock(&icom_port->uart_port.lock);
+ uart_port_lock(&icom_port->uart_port);
/*modem input register */
status = readb(&icom_port->dram->isr);
@@ -951,7 +951,7 @@ static inline void check_modem_status(struct icom_port *icom_port)
port.delta_msr_wait);
old_status = status;
}
- spin_unlock(&icom_port->uart_port.lock);
+ uart_port_unlock(&icom_port->uart_port);
}
static void xmit_interrupt(u16 port_int_reg, struct icom_port *icom_port)
@@ -1093,7 +1093,7 @@ static void process_interrupt(u16 port_int_reg,
struct icom_port *icom_port)
{
- spin_lock(&icom_port->uart_port.lock);
+ uart_port_lock(&icom_port->uart_port);
trace(icom_port, "INTERRUPT", port_int_reg);
if (port_int_reg & (INT_XMIT_COMPLETED | INT_XMIT_DISABLED))
@@ -1102,7 +1102,7 @@ static void process_interrupt(u16 port_int_reg,
if (port_int_reg & INT_RCV_COMPLETED)
recv_interrupt(port_int_reg, icom_port);
- spin_unlock(&icom_port->uart_port.lock);
+ uart_port_unlock(&icom_port->uart_port);
}
static irqreturn_t icom_interrupt(int irq, void *dev_id)
@@ -1186,14 +1186,14 @@ static unsigned int icom_tx_empty(struct uart_port *port)
int ret;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (le16_to_cpu(icom_port->statStg->xmit[0].flags) &
SA_FLAGS_READY_TO_XMIT)
ret = TIOCSER_TEMT;
else
ret = 0;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return ret;
}
@@ -1276,7 +1276,7 @@ static void icom_send_xchar(struct uart_port *port, char ch)
/* wait .1 sec to send char */
for (index = 0; index < 10; index++) {
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
xdata = readb(&icom_port->dram->xchar);
if (xdata == 0x00) {
trace(icom_port, "QUICK_WRITE", 0);
@@ -1284,10 +1284,10 @@ static void icom_send_xchar(struct uart_port *port, char ch)
/* flush write operation */
xdata = readb(&icom_port->dram->xchar);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
break;
}
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
msleep(10);
}
}
@@ -1307,7 +1307,7 @@ static void icom_break(struct uart_port *port, int break_state)
unsigned char cmdReg;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
trace(icom_port, "BREAK", 0);
cmdReg = readb(&icom_port->dram->CmdReg);
if (break_state == -1) {
@@ -1315,7 +1315,7 @@ static void icom_break(struct uart_port *port, int break_state)
} else {
writeb(cmdReg & ~CMD_SND_BREAK, &icom_port->dram->CmdReg);
}
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static int icom_open(struct uart_port *port)
@@ -1365,7 +1365,7 @@ static void icom_set_termios(struct uart_port *port, struct ktermios *termios,
unsigned long offset;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
trace(icom_port, "CHANGE_SPEED", 0);
cflag = termios->c_cflag;
@@ -1516,7 +1516,7 @@ static void icom_set_termios(struct uart_port *port, struct ktermios *termios,
trace(icom_port, "XR_ENAB", 0);
writeb(CMD_XMIT_RCV_ENABLE, &icom_port->dram->CmdReg);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *icom_type(struct uart_port *port)
--
2.45.2

359
buildroot-external/patches/linux/0055-serial-imx-Use-port-lock-wrappers.patch
View File

@ -1,359 +0,0 @@
From 9b77283262bf5440db5c5730b730a1b949574684 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:46 +0206
Subject: [PATCH 055/198] serial: imx: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-30-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/imx.c | 84 ++++++++++++++++++++--------------------
1 file changed, 42 insertions(+), 42 deletions(-)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index a5d0df2ba5c5..267c9af4bd53 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -586,7 +586,7 @@ static void imx_uart_dma_tx_callback(void *data)
unsigned long flags;
u32 ucr1;
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
dma_unmap_sg(sport->port.dev, sgl, sport->dma_tx_nents, DMA_TO_DEVICE);
@@ -611,7 +611,7 @@ static void imx_uart_dma_tx_callback(void *data)
imx_uart_writel(sport, ucr4, UCR4);
}
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
/* called with port.lock taken and irqs off */
@@ -782,11 +782,11 @@ static irqreturn_t imx_uart_rtsint(int irq, void *dev_id)
struct imx_port *sport = dev_id;
irqreturn_t ret;
- spin_lock(&sport->port.lock);
+ uart_port_lock(&sport->port);
ret = __imx_uart_rtsint(irq, dev_id);
- spin_unlock(&sport->port.lock);
+ uart_port_unlock(&sport->port);
return ret;
}
@@ -795,9 +795,9 @@ static irqreturn_t imx_uart_txint(int irq, void *dev_id)
{
struct imx_port *sport = dev_id;
- spin_lock(&sport->port.lock);
+ uart_port_lock(&sport->port);
imx_uart_transmit_buffer(sport);
- spin_unlock(&sport->port.lock);
+ uart_port_unlock(&sport->port);
return IRQ_HANDLED;
}
@@ -911,11 +911,11 @@ static irqreturn_t imx_uart_rxint(int irq, void *dev_id)
struct imx_port *sport = dev_id;
irqreturn_t ret;
- spin_lock(&sport->port.lock);
+ uart_port_lock(&sport->port);
ret = __imx_uart_rxint(irq, dev_id);
- spin_unlock(&sport->port.lock);
+ uart_port_unlock(&sport->port);
return ret;
}
@@ -978,7 +978,7 @@ static irqreturn_t imx_uart_int(int irq, void *dev_id)
unsigned int usr1, usr2, ucr1, ucr2, ucr3, ucr4;
irqreturn_t ret = IRQ_NONE;
- spin_lock(&sport->port.lock);
+ uart_port_lock(&sport->port);
usr1 = imx_uart_readl(sport, USR1);
usr2 = imx_uart_readl(sport, USR2);
@@ -1048,7 +1048,7 @@ static irqreturn_t imx_uart_int(int irq, void *dev_id)
ret = IRQ_HANDLED;
}
- spin_unlock(&sport->port.lock);
+ uart_port_unlock(&sport->port);
return ret;
}
@@ -1131,7 +1131,7 @@ static void imx_uart_break_ctl(struct uart_port *port, int break_state)
unsigned long flags;
u32 ucr1;
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
ucr1 = imx_uart_readl(sport, UCR1) & ~UCR1_SNDBRK;
@@ -1140,7 +1140,7 @@ static void imx_uart_break_ctl(struct uart_port *port, int break_state)
imx_uart_writel(sport, ucr1, UCR1);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
/*
@@ -1153,9 +1153,9 @@ static void imx_uart_timeout(struct timer_list *t)
unsigned long flags;
if (sport->port.state) {
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
imx_uart_mctrl_check(sport);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
mod_timer(&sport->timer, jiffies + MCTRL_TIMEOUT);
}
@@ -1185,9 +1185,9 @@ static void imx_uart_dma_rx_callback(void *data)
status = dmaengine_tx_status(chan, sport->rx_cookie, &state);
if (status == DMA_ERROR) {
- spin_lock(&sport->port.lock);
+ uart_port_lock(&sport->port);
imx_uart_clear_rx_errors(sport);
- spin_unlock(&sport->port.lock);
+ uart_port_unlock(&sport->port);
return;
}
@@ -1216,9 +1216,9 @@ static void imx_uart_dma_rx_callback(void *data)
r_bytes = rx_ring->head - rx_ring->tail;
/* If we received something, check for 0xff flood */
- spin_lock(&sport->port.lock);
+ uart_port_lock(&sport->port);
imx_uart_check_flood(sport, imx_uart_readl(sport, USR2));
- spin_unlock(&sport->port.lock);
+ uart_port_unlock(&sport->port);
if (!(sport->port.ignore_status_mask & URXD_DUMMY_READ)) {
@@ -1476,7 +1476,7 @@ static int imx_uart_startup(struct uart_port *port)
if (!uart_console(port) && imx_uart_dma_init(sport) == 0)
dma_is_inited = 1;
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
/* Reset fifo's and state machines */
imx_uart_soft_reset(sport);
@@ -1549,7 +1549,7 @@ static int imx_uart_startup(struct uart_port *port)
imx_uart_disable_loopback_rs485(sport);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
return 0;
}
@@ -1574,21 +1574,21 @@ static void imx_uart_shutdown(struct uart_port *port)
sport->dma_is_rxing = 0;
}
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
imx_uart_stop_tx(port);
imx_uart_stop_rx(port);
imx_uart_disable_dma(sport);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
imx_uart_dma_exit(sport);
}
mctrl_gpio_disable_ms(sport->gpios);
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
ucr2 = imx_uart_readl(sport, UCR2);
ucr2 &= ~(UCR2_TXEN | UCR2_ATEN);
imx_uart_writel(sport, ucr2, UCR2);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
/*
* Stop our timer.
@@ -1599,7 +1599,7 @@ static void imx_uart_shutdown(struct uart_port *port)
* Disable all interrupts, port and break condition.
*/
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
ucr1 = imx_uart_readl(sport, UCR1);
ucr1 &= ~(UCR1_TRDYEN | UCR1_RRDYEN | UCR1_RTSDEN | UCR1_RXDMAEN |
@@ -1621,7 +1621,7 @@ static void imx_uart_shutdown(struct uart_port *port)
ucr4 &= ~UCR4_TCEN;
imx_uart_writel(sport, ucr4, UCR4);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
clk_disable_unprepare(sport->clk_per);
clk_disable_unprepare(sport->clk_ipg);
@@ -1684,7 +1684,7 @@ imx_uart_set_termios(struct uart_port *port, struct ktermios *termios,
baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 16);
quot = uart_get_divisor(port, baud);
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
/*
* Read current UCR2 and save it for future use, then clear all the bits
@@ -1812,7 +1812,7 @@ imx_uart_set_termios(struct uart_port *port, struct ktermios *termios,
if (UART_ENABLE_MS(&sport->port, termios->c_cflag))
imx_uart_enable_ms(&sport->port);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
static const char *imx_uart_type(struct uart_port *port)
@@ -1874,7 +1874,7 @@ static int imx_uart_poll_init(struct uart_port *port)
imx_uart_setup_ufcr(sport, TXTL_DEFAULT, RXTL_DEFAULT);
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
/*
* Be careful about the order of enabling bits here. First enable the
@@ -1902,7 +1902,7 @@ static int imx_uart_poll_init(struct uart_port *port)
imx_uart_writel(sport, ucr1 | UCR1_RRDYEN, UCR1);
imx_uart_writel(sport, ucr2 | UCR2_ATEN, UCR2);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
return 0;
}
@@ -2022,9 +2022,9 @@ imx_uart_console_write(struct console *co, const char *s, unsigned int count)
if (sport->port.sysrq)
locked = 0;
else if (oops_in_progress)
- locked = spin_trylock_irqsave(&sport->port.lock, flags);
+ locked = uart_port_trylock_irqsave(&sport->port, &flags);
else
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
/*
* First, save UCR1/2/3 and then disable interrupts
@@ -2052,7 +2052,7 @@ imx_uart_console_write(struct console *co, const char *s, unsigned int count)
imx_uart_ucrs_restore(sport, &old_ucr);
if (locked)
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
/*
@@ -2210,10 +2210,10 @@ static enum hrtimer_restart imx_trigger_start_tx(struct hrtimer *t)
struct imx_port *sport = container_of(t, struct imx_port, trigger_start_tx);
unsigned long flags;
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
if (sport->tx_state == WAIT_AFTER_RTS)
imx_uart_start_tx(&sport->port);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
return HRTIMER_NORESTART;
}
@@ -2223,10 +2223,10 @@ static enum hrtimer_restart imx_trigger_stop_tx(struct hrtimer *t)
struct imx_port *sport = container_of(t, struct imx_port, trigger_stop_tx);
unsigned long flags;
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
if (sport->tx_state == WAIT_AFTER_SEND)
imx_uart_stop_tx(&sport->port);
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
return HRTIMER_NORESTART;
}
@@ -2493,9 +2493,9 @@ static void imx_uart_restore_context(struct imx_port *sport)
{
unsigned long flags;
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
if (!sport->context_saved) {
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
return;
}
@@ -2510,7 +2510,7 @@ static void imx_uart_restore_context(struct imx_port *sport)
imx_uart_writel(sport, sport->saved_reg[2], UCR3);
imx_uart_writel(sport, sport->saved_reg[3], UCR4);
sport->context_saved = false;
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
static void imx_uart_save_context(struct imx_port *sport)
@@ -2518,7 +2518,7 @@ static void imx_uart_save_context(struct imx_port *sport)
unsigned long flags;
/* Save necessary regs */
- spin_lock_irqsave(&sport->port.lock, flags);
+ uart_port_lock_irqsave(&sport->port, &flags);
sport->saved_reg[0] = imx_uart_readl(sport, UCR1);
sport->saved_reg[1] = imx_uart_readl(sport, UCR2);
sport->saved_reg[2] = imx_uart_readl(sport, UCR3);
@@ -2530,7 +2530,7 @@ static void imx_uart_save_context(struct imx_port *sport)
sport->saved_reg[8] = imx_uart_readl(sport, UBMR);
sport->saved_reg[9] = imx_uart_readl(sport, IMX21_UTS);
sport->context_saved = true;
- spin_unlock_irqrestore(&sport->port.lock, flags);
+ uart_port_unlock_irqrestore(&sport->port, flags);
}
static void imx_uart_enable_wakeup(struct imx_port *sport, bool on)
--
2.45.2

190
buildroot-external/patches/linux/0056-serial-ip22zilog-Use-port-lock-wrappers.patch
View File

@ -1,190 +0,0 @@
From 5081d781475382d4544b5f92b14f1756a98caca8 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:47 +0206
Subject: [PATCH 056/198] serial: ip22zilog: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-31-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/ip22zilog.c | 36 +++++++++++++++++-----------------
1 file changed, 18 insertions(+), 18 deletions(-)
diff --git a/drivers/tty/serial/ip22zilog.c b/drivers/tty/serial/ip22zilog.c
index 845ff706bc59..320b29cd4683 100644
--- a/drivers/tty/serial/ip22zilog.c
+++ b/drivers/tty/serial/ip22zilog.c
@@ -432,7 +432,7 @@ static irqreturn_t ip22zilog_interrupt(int irq, void *dev_id)
unsigned char r3;
bool push = false;
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
r3 = read_zsreg(channel, R3);
/* Channel A */
@@ -448,7 +448,7 @@ static irqreturn_t ip22zilog_interrupt(int irq, void *dev_id)
if (r3 & CHATxIP)
ip22zilog_transmit_chars(up, channel);
}
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
if (push)
tty_flip_buffer_push(&up->port.state->port);
@@ -458,7 +458,7 @@ static irqreturn_t ip22zilog_interrupt(int irq, void *dev_id)
channel = ZILOG_CHANNEL_FROM_PORT(&up->port);
push = false;
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) {
writeb(RES_H_IUS, &channel->control);
ZSDELAY();
@@ -471,7 +471,7 @@ static irqreturn_t ip22zilog_interrupt(int irq, void *dev_id)
if (r3 & CHBTxIP)
ip22zilog_transmit_chars(up, channel);
}
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
if (push)
tty_flip_buffer_push(&up->port.state->port);
@@ -504,11 +504,11 @@ static unsigned int ip22zilog_tx_empty(struct uart_port *port)
unsigned char status;
unsigned int ret;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
status = ip22zilog_read_channel_status(port);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
if (status & Tx_BUF_EMP)
ret = TIOCSER_TEMT;
@@ -664,7 +664,7 @@ static void ip22zilog_break_ctl(struct uart_port *port, int break_state)
else
clear_bits |= SND_BRK;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
new_reg = (up->curregs[R5] | set_bits) & ~clear_bits;
if (new_reg != up->curregs[R5]) {
@@ -674,7 +674,7 @@ static void ip22zilog_break_ctl(struct uart_port *port, int break_state)
write_zsreg(channel, R5, up->curregs[R5]);
}
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void __ip22zilog_reset(struct uart_ip22zilog_port *up)
@@ -735,9 +735,9 @@ static int ip22zilog_startup(struct uart_port *port)
if (ZS_IS_CONS(up))
return 0;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
__ip22zilog_startup(up);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return 0;
}
@@ -775,7 +775,7 @@ static void ip22zilog_shutdown(struct uart_port *port)
if (ZS_IS_CONS(up))
return;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
channel = ZILOG_CHANNEL_FROM_PORT(port);
@@ -788,7 +788,7 @@ static void ip22zilog_shutdown(struct uart_port *port)
up->curregs[R5] &= ~SND_BRK;
ip22zilog_maybe_update_regs(up, channel);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
/* Shared by TTY driver and serial console setup. The port lock is held
@@ -880,7 +880,7 @@ ip22zilog_set_termios(struct uart_port *port, struct ktermios *termios,
baud = uart_get_baud_rate(port, termios, old, 1200, 76800);
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR);
@@ -894,7 +894,7 @@ ip22zilog_set_termios(struct uart_port *port, struct ktermios *termios,
ip22zilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(port));
uart_update_timeout(port, termios->c_cflag, baud);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static const char *ip22zilog_type(struct uart_port *port)
@@ -1016,10 +1016,10 @@ ip22zilog_console_write(struct console *con, const char *s, unsigned int count)
struct uart_ip22zilog_port *up = &ip22zilog_port_table[con->index];
unsigned long flags;
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
uart_console_write(&up->port, s, count, ip22zilog_put_char);
udelay(2);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static int __init ip22zilog_console_setup(struct console *con, char *options)
@@ -1034,13 +1034,13 @@ static int __init ip22zilog_console_setup(struct console *con, char *options)
printk(KERN_INFO "Console: ttyS%d (IP22-Zilog)\n", con->index);
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
up->curregs[R15] |= BRKIE;
__ip22zilog_startup(up);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
--
2.45.2

131
buildroot-external/patches/linux/0057-serial-jsm-Use-port-lock-wrappers.patch
View File

@ -1,131 +0,0 @@
From b0dca7a41ff05f6b45e242b5c21f77d4898ae670 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:48 +0206
Subject: [PATCH 057/198] serial: jsm: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-32-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/jsm/jsm_neo.c | 4 ++--
drivers/tty/serial/jsm/jsm_tty.c | 16 ++++++++--------
2 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/tty/serial/jsm/jsm_neo.c b/drivers/tty/serial/jsm/jsm_neo.c
index 0c78f66276cd..2bd640428970 100644
--- a/drivers/tty/serial/jsm/jsm_neo.c
+++ b/drivers/tty/serial/jsm/jsm_neo.c
@@ -816,9 +816,9 @@ static void neo_parse_isr(struct jsm_board *brd, u32 port)
/* Parse any modem signal changes */
jsm_dbg(INTR, &ch->ch_bd->pci_dev,
"MOD_STAT: sending to parse_modem_sigs\n");
- spin_lock_irqsave(&ch->uart_port.lock, lock_flags);
+ uart_port_lock_irqsave(&ch->uart_port, &lock_flags);
neo_parse_modem(ch, readb(&ch->ch_neo_uart->msr));
- spin_unlock_irqrestore(&ch->uart_port.lock, lock_flags);
+ uart_port_unlock_irqrestore(&ch->uart_port, lock_flags);
}
}
diff --git a/drivers/tty/serial/jsm/jsm_tty.c b/drivers/tty/serial/jsm/jsm_tty.c
index 222afc270c88..ce0fef7e2c66 100644
--- a/drivers/tty/serial/jsm/jsm_tty.c
+++ b/drivers/tty/serial/jsm/jsm_tty.c
@@ -152,14 +152,14 @@ static void jsm_tty_send_xchar(struct uart_port *port, char ch)
container_of(port, struct jsm_channel, uart_port);
struct ktermios *termios;
- spin_lock_irqsave(&port->lock, lock_flags);
+ uart_port_lock_irqsave(port, &lock_flags);
termios = &port->state->port.tty->termios;
if (ch == termios->c_cc[VSTART])
channel->ch_bd->bd_ops->send_start_character(channel);
if (ch == termios->c_cc[VSTOP])
channel->ch_bd->bd_ops->send_stop_character(channel);
- spin_unlock_irqrestore(&port->lock, lock_flags);
+ uart_port_unlock_irqrestore(port, lock_flags);
}
static void jsm_tty_stop_rx(struct uart_port *port)
@@ -176,13 +176,13 @@ static void jsm_tty_break(struct uart_port *port, int break_state)
struct jsm_channel *channel =
container_of(port, struct jsm_channel, uart_port);
- spin_lock_irqsave(&port->lock, lock_flags);
+ uart_port_lock_irqsave(port, &lock_flags);
if (break_state == -1)
channel->ch_bd->bd_ops->send_break(channel);
else
channel->ch_bd->bd_ops->clear_break(channel);
- spin_unlock_irqrestore(&port->lock, lock_flags);
+ uart_port_unlock_irqrestore(port, lock_flags);
}
static int jsm_tty_open(struct uart_port *port)
@@ -241,7 +241,7 @@ static int jsm_tty_open(struct uart_port *port)
channel->ch_cached_lsr = 0;
channel->ch_stops_sent = 0;
- spin_lock_irqsave(&port->lock, lock_flags);
+ uart_port_lock_irqsave(port, &lock_flags);
termios = &port->state->port.tty->termios;
channel->ch_c_cflag = termios->c_cflag;
channel->ch_c_iflag = termios->c_iflag;
@@ -261,7 +261,7 @@ static int jsm_tty_open(struct uart_port *port)
jsm_carrier(channel);
channel->ch_open_count++;
- spin_unlock_irqrestore(&port->lock, lock_flags);
+ uart_port_unlock_irqrestore(port, lock_flags);
jsm_dbg(OPEN, &channel->ch_bd->pci_dev, "finish\n");
return 0;
@@ -307,7 +307,7 @@ static void jsm_tty_set_termios(struct uart_port *port,
struct jsm_channel *channel =
container_of(port, struct jsm_channel, uart_port);
- spin_lock_irqsave(&port->lock, lock_flags);
+ uart_port_lock_irqsave(port, &lock_flags);
channel->ch_c_cflag = termios->c_cflag;
channel->ch_c_iflag = termios->c_iflag;
channel->ch_c_oflag = termios->c_oflag;
@@ -317,7 +317,7 @@ static void jsm_tty_set_termios(struct uart_port *port,
channel->ch_bd->bd_ops->param(channel);
jsm_carrier(channel);
- spin_unlock_irqrestore(&port->lock, lock_flags);
+ uart_port_unlock_irqrestore(port, lock_flags);
}
static const char *jsm_tty_type(struct uart_port *port)
--
2.45.2

115
buildroot-external/patches/linux/0058-serial-liteuart-Use-port-lock-wrappers.patch
View File

@ -1,115 +0,0 @@
From 7b3c2ea3b2cce4ad46cbb8e27e6ba64a88f18874 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:49 +0206
Subject: [PATCH 058/198] serial: liteuart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Gabriel Somlo <gsomlo@gmail.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-33-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/liteuart.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
index d881cdd2a58f..a25ab1efe38f 100644
--- a/drivers/tty/serial/liteuart.c
+++ b/drivers/tty/serial/liteuart.c
@@ -139,13 +139,13 @@ static irqreturn_t liteuart_interrupt(int irq, void *data)
* if polling, the context would be "in_serving_softirq", so use
* irq[save|restore] spin_lock variants to cover all possibilities
*/
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
isr = litex_read8(port->membase + OFF_EV_PENDING) & uart->irq_reg;
if (isr & EV_RX)
liteuart_rx_chars(port);
if (isr & EV_TX)
liteuart_tx_chars(port);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return IRQ_RETVAL(isr);
}
@@ -195,10 +195,10 @@ static int liteuart_startup(struct uart_port *port)
}
}
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* only enabling rx irqs during startup */
liteuart_update_irq_reg(port, true, EV_RX);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
if (!port->irq) {
timer_setup(&uart->timer, liteuart_timer, 0);
@@ -213,9 +213,9 @@ static void liteuart_shutdown(struct uart_port *port)
struct liteuart_port *uart = to_liteuart_port(port);
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
liteuart_update_irq_reg(port, false, EV_RX | EV_TX);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
if (port->irq)
free_irq(port->irq, port);
@@ -229,13 +229,13 @@ static void liteuart_set_termios(struct uart_port *port, struct ktermios *new,
unsigned int baud;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* update baudrate */
baud = uart_get_baud_rate(port, new, old, 0, 460800);
uart_update_timeout(port, new->c_cflag, baud);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *liteuart_type(struct uart_port *port)
@@ -382,9 +382,9 @@ static void liteuart_console_write(struct console *co, const char *s,
uart = (struct liteuart_port *)xa_load(&liteuart_array, co->index);
port = &uart->port;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
uart_console_write(port, s, count, liteuart_putchar);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static int liteuart_console_setup(struct console *co, char *options)
--
2.45.2

153
buildroot-external/patches/linux/0059-serial-lpc32xx_hs-Use-port-lock-wrappers.patch
View File

@ -1,153 +0,0 @@
From 237cdf22e2d45ba69c9c9732b50ea47a3c4117b8 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:50 +0206
Subject: [PATCH 059/198] serial: lpc32xx_hs: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-34-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/lpc32xx_hs.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c
index b38fe4728c26..5149a947b7fe 100644
--- a/drivers/tty/serial/lpc32xx_hs.c
+++ b/drivers/tty/serial/lpc32xx_hs.c
@@ -140,15 +140,15 @@ static void lpc32xx_hsuart_console_write(struct console *co, const char *s,
if (up->port.sysrq)
locked = 0;
else if (oops_in_progress)
- locked = spin_trylock(&up->port.lock);
+ locked = uart_port_trylock(&up->port);
else
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
uart_console_write(&up->port, s, count, lpc32xx_hsuart_console_putchar);
wait_for_xmit_empty(&up->port);
if (locked)
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
local_irq_restore(flags);
}
@@ -298,7 +298,7 @@ static irqreturn_t serial_lpc32xx_interrupt(int irq, void *dev_id)
struct tty_port *tport = &port->state->port;
u32 status;
- spin_lock(&port->lock);
+ uart_port_lock(port);
/* Read UART status and clear latched interrupts */
status = readl(LPC32XX_HSUART_IIR(port->membase));
@@ -333,7 +333,7 @@ static irqreturn_t serial_lpc32xx_interrupt(int irq, void *dev_id)
__serial_lpc32xx_tx(port);
}
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return IRQ_HANDLED;
}
@@ -404,14 +404,14 @@ static void serial_lpc32xx_break_ctl(struct uart_port *port,
unsigned long flags;
u32 tmp;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
tmp = readl(LPC32XX_HSUART_CTRL(port->membase));
if (break_state != 0)
tmp |= LPC32XX_HSU_BREAK;
else
tmp &= ~LPC32XX_HSU_BREAK;
writel(tmp, LPC32XX_HSUART_CTRL(port->membase));
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
/* port->lock is not held. */
@@ -421,7 +421,7 @@ static int serial_lpc32xx_startup(struct uart_port *port)
unsigned long flags;
u32 tmp;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
__serial_uart_flush(port);
@@ -441,7 +441,7 @@ static int serial_lpc32xx_startup(struct uart_port *port)
lpc32xx_loopback_set(port->mapbase, 0); /* get out of loopback mode */
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
retval = request_irq(port->irq, serial_lpc32xx_interrupt,
0, MODNAME, port);
@@ -458,7 +458,7 @@ static void serial_lpc32xx_shutdown(struct uart_port *port)
u32 tmp;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
tmp = LPC32XX_HSU_TX_TL8B | LPC32XX_HSU_RX_TL32B |
LPC32XX_HSU_OFFSET(20) | LPC32XX_HSU_TMO_INACT_4B;
@@ -466,7 +466,7 @@ static void serial_lpc32xx_shutdown(struct uart_port *port)
lpc32xx_loopback_set(port->mapbase, 1); /* go to loopback mode */
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
free_irq(port->irq, port);
}
@@ -491,7 +491,7 @@ static void serial_lpc32xx_set_termios(struct uart_port *port,
quot = __serial_get_clock_div(port->uartclk, baud);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Ignore characters? */
tmp = readl(LPC32XX_HSUART_CTRL(port->membase));
@@ -505,7 +505,7 @@ static void serial_lpc32xx_set_termios(struct uart_port *port,
uart_update_timeout(port, termios->c_cflag, baud);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
/* Don't rewrite B0 */
if (tty_termios_baud_rate(termios))
--
2.45.2

122
buildroot-external/patches/linux/0060-serial-ma35d1-Use-port-lock-wrappers.patch
View File

@ -1,122 +0,0 @@
From 5969916a10182049759b55eaa6854f0ae5fd6478 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:51 +0206
Subject: [PATCH 060/198] serial: ma35d1: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-35-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/ma35d1_serial.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/drivers/tty/serial/ma35d1_serial.c b/drivers/tty/serial/ma35d1_serial.c
index 99225f1e02ac..faccd772c68c 100644
--- a/drivers/tty/serial/ma35d1_serial.c
+++ b/drivers/tty/serial/ma35d1_serial.c
@@ -269,16 +269,16 @@ static void receive_chars(struct uart_ma35d1_port *up)
if (uart_handle_sysrq_char(&up->port, ch))
continue;
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
uart_insert_char(&up->port, fsr, MA35_FSR_RX_OVER_IF, ch, flag);
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
fsr = serial_in(up, MA35_FSR_REG);
} while (!(fsr & MA35_FSR_RX_EMPTY) && (max_count-- > 0));
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
tty_flip_buffer_push(&up->port.state->port);
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
}
static irqreturn_t ma35d1serial_interrupt(int irq, void *dev_id)
@@ -364,14 +364,14 @@ static void ma35d1serial_break_ctl(struct uart_port *port, int break_state)
unsigned long flags;
u32 lcr;
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
lcr = serial_in(up, MA35_LCR_REG);
if (break_state != 0)
lcr |= MA35_LCR_BREAK;
else
lcr &= ~MA35_LCR_BREAK;
serial_out(up, MA35_LCR_REG, lcr);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static int ma35d1serial_startup(struct uart_port *port)
@@ -441,7 +441,7 @@ static void ma35d1serial_set_termios(struct uart_port *port,
* Ok, we're now changing the port state. Do it with
* interrupts disabled.
*/
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
up->port.read_status_mask = MA35_FSR_RX_OVER_IF;
if (termios->c_iflag & INPCK)
@@ -475,7 +475,7 @@ static void ma35d1serial_set_termios(struct uart_port *port,
serial_out(up, MA35_LCR_REG, lcr);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static const char *ma35d1serial_type(struct uart_port *port)
@@ -568,9 +568,9 @@ static void ma35d1serial_console_write(struct console *co, const char *s, u32 co
if (up->port.sysrq)
locked = 0;
else if (oops_in_progress)
- locked = spin_trylock_irqsave(&up->port.lock, flags);
+ locked = uart_port_trylock_irqsave(&up->port, &flags);
else
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
/*
* First save the IER then disable the interrupts
@@ -584,7 +584,7 @@ static void ma35d1serial_console_write(struct console *co, const char *s, u32 co
serial_out(up, MA35_IER_REG, ier);
if (locked)
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static int __init ma35d1serial_console_setup(struct console *co, char *options)
--
2.45.2

132
buildroot-external/patches/linux/0061-serial-mcf-Use-port-lock-wrappers.patch
View File

@ -1,132 +0,0 @@
From f3abad909d805624b6de91cbd4678e78dd7461d4 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:52 +0206
Subject: [PATCH 061/198] serial: mcf: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-36-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/mcf.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/tty/serial/mcf.c b/drivers/tty/serial/mcf.c
index aea29b4e6567..ee40af20a08f 100644
--- a/drivers/tty/serial/mcf.c
+++ b/drivers/tty/serial/mcf.c
@@ -135,12 +135,12 @@ static void mcf_break_ctl(struct uart_port *port, int break_state)
{
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (break_state == -1)
writeb(MCFUART_UCR_CMDBREAKSTART, port->membase + MCFUART_UCR);
else
writeb(MCFUART_UCR_CMDBREAKSTOP, port->membase + MCFUART_UCR);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
/****************************************************************************/
@@ -150,7 +150,7 @@ static int mcf_startup(struct uart_port *port)
struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Reset UART, get it into known state... */
writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
@@ -164,7 +164,7 @@ static int mcf_startup(struct uart_port *port)
pp->imr = MCFUART_UIR_RXREADY;
writeb(pp->imr, port->membase + MCFUART_UIMR);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return 0;
}
@@ -176,7 +176,7 @@ static void mcf_shutdown(struct uart_port *port)
struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Disable all interrupts now */
pp->imr = 0;
@@ -186,7 +186,7 @@ static void mcf_shutdown(struct uart_port *port)
writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
/****************************************************************************/
@@ -252,7 +252,7 @@ static void mcf_set_termios(struct uart_port *port, struct ktermios *termios,
mr2 |= MCFUART_MR2_TXCTS;
}
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (port->rs485.flags & SER_RS485_ENABLED) {
dev_dbg(port->dev, "Setting UART to RS485\n");
mr2 |= MCFUART_MR2_TXRTS;
@@ -273,7 +273,7 @@ static void mcf_set_termios(struct uart_port *port, struct ktermios *termios,
port->membase + MCFUART_UCSR);
writeb(MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE,
port->membase + MCFUART_UCR);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
/****************************************************************************/
@@ -350,7 +350,7 @@ static irqreturn_t mcf_interrupt(int irq, void *data)
isr = readb(port->membase + MCFUART_UISR) & pp->imr;
- spin_lock(&port->lock);
+ uart_port_lock(port);
if (isr & MCFUART_UIR_RXREADY) {
mcf_rx_chars(pp);
ret = IRQ_HANDLED;
@@ -359,7 +359,7 @@ static irqreturn_t mcf_interrupt(int irq, void *data)
mcf_tx_chars(pp);
ret = IRQ_HANDLED;
}
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return ret;
}
--
2.45.2

81
buildroot-external/patches/linux/0062-serial-men_z135_uart-Use-port-lock-wrappers.patch
View File

@ -1,81 +0,0 @@
From 05ed881ffad6d1a5ec2254008c58f1c2d3d19513 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:53 +0206
Subject: [PATCH 062/198] serial: men_z135_uart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-37-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/men_z135_uart.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/men_z135_uart.c b/drivers/tty/serial/men_z135_uart.c
index d2502aaa3e8c..8048fa542fc4 100644
--- a/drivers/tty/serial/men_z135_uart.c
+++ b/drivers/tty/serial/men_z135_uart.c
@@ -392,7 +392,7 @@ static irqreturn_t men_z135_intr(int irq, void *data)
if (!irq_id)
goto out;
- spin_lock(&port->lock);
+ uart_port_lock(port);
/* It's save to write to IIR[7:6] RXC[9:8] */
iowrite8(irq_id, port->membase + MEN_Z135_STAT_REG);
@@ -418,7 +418,7 @@ static irqreturn_t men_z135_intr(int irq, void *data)
handled = true;
}
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
out:
return IRQ_RETVAL(handled);
}
@@ -708,7 +708,7 @@ static void men_z135_set_termios(struct uart_port *port,
baud = uart_get_baud_rate(port, termios, old, 0, uart_freq / 16);
- spin_lock_irq(&port->lock);
+ uart_port_lock_irq(port);
if (tty_termios_baud_rate(termios))
tty_termios_encode_baud_rate(termios, baud, baud);
@@ -716,7 +716,7 @@ static void men_z135_set_termios(struct uart_port *port,
iowrite32(bd_reg, port->membase + MEN_Z135_BAUD_REG);
uart_update_timeout(port, termios->c_cflag, baud);
- spin_unlock_irq(&port->lock);
+ uart_port_unlock_irq(port);
}
static const char *men_z135_type(struct uart_port *port)
--
2.45.2

173
buildroot-external/patches/linux/0063-serial-meson-Use-port-lock-wrappers.patch
View File

@ -1,173 +0,0 @@
From 6efda0771514df14d0ca711f278924edb2236bbe Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:54 +0206
Subject: [PATCH 063/198] serial: meson: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-38-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/meson_uart.c | 30 +++++++++++++++---------------
1 file changed, 15 insertions(+), 15 deletions(-)
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index 9388b9ddea3b..4c1d2089a0bb 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -129,14 +129,14 @@ static void meson_uart_shutdown(struct uart_port *port)
free_irq(port->irq, port);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
val = readl(port->membase + AML_UART_CONTROL);
val &= ~AML_UART_RX_EN;
val &= ~(AML_UART_RX_INT_EN | AML_UART_TX_INT_EN);
writel(val, port->membase + AML_UART_CONTROL);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void meson_uart_start_tx(struct uart_port *port)
@@ -238,7 +238,7 @@ static irqreturn_t meson_uart_interrupt(int irq, void *dev_id)
{
struct uart_port *port = (struct uart_port *)dev_id;
- spin_lock(&port->lock);
+ uart_port_lock(port);
if (!(readl(port->membase + AML_UART_STATUS) & AML_UART_RX_EMPTY))
meson_receive_chars(port);
@@ -248,7 +248,7 @@ static irqreturn_t meson_uart_interrupt(int irq, void *dev_id)
meson_uart_start_tx(port);
}
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return IRQ_HANDLED;
}
@@ -284,7 +284,7 @@ static int meson_uart_startup(struct uart_port *port)
u32 val;
int ret = 0;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
val = readl(port->membase + AML_UART_CONTROL);
val |= AML_UART_CLEAR_ERR;
@@ -301,7 +301,7 @@ static int meson_uart_startup(struct uart_port *port)
val = (AML_UART_RECV_IRQ(1) | AML_UART_XMIT_IRQ(port->fifosize / 2));
writel(val, port->membase + AML_UART_MISC);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
ret = request_irq(port->irq, meson_uart_interrupt, 0,
port->name, port);
@@ -341,7 +341,7 @@ static void meson_uart_set_termios(struct uart_port *port,
unsigned long flags;
u32 val;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
cflags = termios->c_cflag;
iflags = termios->c_iflag;
@@ -405,7 +405,7 @@ static void meson_uart_set_termios(struct uart_port *port,
AML_UART_FRAME_ERR;
uart_update_timeout(port, termios->c_cflag, baud);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static int meson_uart_verify_port(struct uart_port *port,
@@ -464,14 +464,14 @@ static int meson_uart_poll_get_char(struct uart_port *port)
u32 c;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (readl(port->membase + AML_UART_STATUS) & AML_UART_RX_EMPTY)
c = NO_POLL_CHAR;
else
c = readl(port->membase + AML_UART_RFIFO);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return c;
}
@@ -482,7 +482,7 @@ static void meson_uart_poll_put_char(struct uart_port *port, unsigned char c)
u32 reg;
int ret;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Wait until FIFO is empty or timeout */
ret = readl_poll_timeout_atomic(port->membase + AML_UART_STATUS, reg,
@@ -506,7 +506,7 @@ static void meson_uart_poll_put_char(struct uart_port *port, unsigned char c)
dev_err(port->dev, "Timeout waiting for UART TX EMPTY\n");
out:
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
#endif /* CONFIG_CONSOLE_POLL */
@@ -563,9 +563,9 @@ static void meson_serial_port_write(struct uart_port *port, const char *s,
if (port->sysrq) {
locked = 0;
} else if (oops_in_progress) {
- locked = spin_trylock(&port->lock);
+ locked = uart_port_trylock(port);
} else {
- spin_lock(&port->lock);
+ uart_port_lock(port);
locked = 1;
}
@@ -577,7 +577,7 @@ static void meson_serial_port_write(struct uart_port *port, const char *s,
writel(val, port->membase + AML_UART_CONTROL);
if (locked)
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
local_irq_restore(flags);
}
--
2.45.2

106
buildroot-external/patches/linux/0064-serial-milbeaut_usio-Use-port-lock-wrappers.patch
View File

@ -1,106 +0,0 @@
From 4988f6a2000b18714877f7723f34b594da6e2222 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:55 +0206
Subject: [PATCH 064/198] serial: milbeaut_usio: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-39-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/milbeaut_usio.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/tty/serial/milbeaut_usio.c b/drivers/tty/serial/milbeaut_usio.c
index 70a910085e93..db3b81f2aa57 100644
--- a/drivers/tty/serial/milbeaut_usio.c
+++ b/drivers/tty/serial/milbeaut_usio.c
@@ -207,9 +207,9 @@ static irqreturn_t mlb_usio_rx_irq(int irq, void *dev_id)
{
struct uart_port *port = dev_id;
- spin_lock(&port->lock);
+ uart_port_lock(port);
mlb_usio_rx_chars(port);
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return IRQ_HANDLED;
}
@@ -218,10 +218,10 @@ static irqreturn_t mlb_usio_tx_irq(int irq, void *dev_id)
{
struct uart_port *port = dev_id;
- spin_lock(&port->lock);
+ uart_port_lock(port);
if (readb(port->membase + MLB_USIO_REG_SSR) & MLB_USIO_SSR_TBI)
mlb_usio_tx_chars(port);
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return IRQ_HANDLED;
}
@@ -267,7 +267,7 @@ static int mlb_usio_startup(struct uart_port *port)
escr = readb(port->membase + MLB_USIO_REG_ESCR);
if (of_property_read_bool(port->dev->of_node, "auto-flow-control"))
escr |= MLB_USIO_ESCR_FLWEN;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
writeb(0, port->membase + MLB_USIO_REG_SCR);
writeb(escr, port->membase + MLB_USIO_REG_ESCR);
writeb(MLB_USIO_SCR_UPCL, port->membase + MLB_USIO_REG_SCR);
@@ -282,7 +282,7 @@ static int mlb_usio_startup(struct uart_port *port)
writeb(MLB_USIO_SCR_TXE | MLB_USIO_SCR_RIE | MLB_USIO_SCR_TBIE |
MLB_USIO_SCR_RXE, port->membase + MLB_USIO_REG_SCR);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return 0;
}
@@ -337,7 +337,7 @@ static void mlb_usio_set_termios(struct uart_port *port,
else
quot = 0;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
uart_update_timeout(port, termios->c_cflag, baud);
port->read_status_mask = MLB_USIO_SSR_ORE | MLB_USIO_SSR_RDRF |
MLB_USIO_SSR_TDRE;
@@ -367,7 +367,7 @@ static void mlb_usio_set_termios(struct uart_port *port,
writew(BIT(12), port->membase + MLB_USIO_REG_FBYTE);
writeb(MLB_USIO_SCR_RIE | MLB_USIO_SCR_RXE | MLB_USIO_SCR_TBIE |
MLB_USIO_SCR_TXE, port->membase + MLB_USIO_REG_SCR);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *mlb_usio_type(struct uart_port *port)
--
2.45.2

94
buildroot-external/patches/linux/0065-serial-mpc52xx-Use-port-lock-wrappers.patch
View File

@ -1,94 +0,0 @@
From c10459bc601c340a3745fd10f72cfc74c65c52cc Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:56 +0206
Subject: [PATCH 065/198] serial: mpc52xx: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-40-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/mpc52xx_uart.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c
index 916507b8f31d..a252465e745f 100644
--- a/drivers/tty/serial/mpc52xx_uart.c
+++ b/drivers/tty/serial/mpc52xx_uart.c
@@ -1096,14 +1096,14 @@ static void
mpc52xx_uart_break_ctl(struct uart_port *port, int ctl)
{
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (ctl == -1)
psc_ops->command(port, MPC52xx_PSC_START_BRK);
else
psc_ops->command(port, MPC52xx_PSC_STOP_BRK);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static int
@@ -1214,7 +1214,7 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new,
}
/* Get the lock */
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Do our best to flush TX & RX, so we don't lose anything */
/* But we don't wait indefinitely ! */
@@ -1250,7 +1250,7 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new,
psc_ops->command(port, MPC52xx_PSC_RX_ENABLE);
/* We're all set, release the lock */
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *
@@ -1477,11 +1477,11 @@ mpc52xx_uart_int(int irq, void *dev_id)
struct uart_port *port = dev_id;
irqreturn_t ret;
- spin_lock(&port->lock);
+ uart_port_lock(port);
ret = psc_ops->handle_irq(port);
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return ret;
}
--
2.45.2

108
buildroot-external/patches/linux/0066-serial-mps2-uart-Use-port-lock-wrappers.patch
View File

@ -1,108 +0,0 @@
From 71dd3597b32c7a1ff230158cb21d346dd37d0df3 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:57 +0206
Subject: [PATCH 066/198] serial: mps2-uart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-41-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/mps2-uart.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/tty/serial/mps2-uart.c b/drivers/tty/serial/mps2-uart.c
index ea5a7911cb15..2a4c09f3a834 100644
--- a/drivers/tty/serial/mps2-uart.c
+++ b/drivers/tty/serial/mps2-uart.c
@@ -188,12 +188,12 @@ static irqreturn_t mps2_uart_rxirq(int irq, void *data)
if (unlikely(!(irqflag & UARTn_INT_RX)))
return IRQ_NONE;
- spin_lock(&port->lock);
+ uart_port_lock(port);
mps2_uart_write8(port, UARTn_INT_RX, UARTn_INT);
mps2_uart_rx_chars(port);
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return IRQ_HANDLED;
}
@@ -206,12 +206,12 @@ static irqreturn_t mps2_uart_txirq(int irq, void *data)
if (unlikely(!(irqflag & UARTn_INT_TX)))
return IRQ_NONE;
- spin_lock(&port->lock);
+ uart_port_lock(port);
mps2_uart_write8(port, UARTn_INT_TX, UARTn_INT);
mps2_uart_tx_chars(port);
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return IRQ_HANDLED;
}
@@ -222,7 +222,7 @@ static irqreturn_t mps2_uart_oerrirq(int irq, void *data)
struct uart_port *port = data;
u8 irqflag = mps2_uart_read8(port, UARTn_INT);
- spin_lock(&port->lock);
+ uart_port_lock(port);
if (irqflag & UARTn_INT_RX_OVERRUN) {
struct tty_port *tport = &port->state->port;
@@ -244,7 +244,7 @@ static irqreturn_t mps2_uart_oerrirq(int irq, void *data)
handled = IRQ_HANDLED;
}
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return handled;
}
@@ -356,12 +356,12 @@ mps2_uart_set_termios(struct uart_port *port, struct ktermios *termios,
bauddiv = DIV_ROUND_CLOSEST(port->uartclk, baud);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
uart_update_timeout(port, termios->c_cflag, baud);
mps2_uart_write32(port, bauddiv, UARTn_BAUDDIV);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
if (tty_termios_baud_rate(termios))
tty_termios_encode_baud_rate(termios, baud, baud);
--
2.45.2

190
buildroot-external/patches/linux/0067-serial-msm-Use-port-lock-wrappers.patch
View File

@ -1,190 +0,0 @@
From c9dc97ed38e7600973f83cfcd5a589f17fc59281 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:58 +0206
Subject: [PATCH 067/198] serial: msm: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-42-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/msm_serial.c | 38 ++++++++++++++++-----------------
1 file changed, 19 insertions(+), 19 deletions(-)
diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index 90953e679e38..597264b546fd 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -444,7 +444,7 @@ static void msm_complete_tx_dma(void *args)
unsigned int count;
u32 val;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Already stopped */
if (!dma->count)
@@ -476,7 +476,7 @@ static void msm_complete_tx_dma(void *args)
msm_handle_tx(port);
done:
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static int msm_handle_tx_dma(struct msm_port *msm_port, unsigned int count)
@@ -549,7 +549,7 @@ static void msm_complete_rx_dma(void *args)
unsigned long flags;
u32 val;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Already stopped */
if (!dma->count)
@@ -587,16 +587,16 @@ static void msm_complete_rx_dma(void *args)
if (!(port->read_status_mask & MSM_UART_SR_RX_BREAK))
flag = TTY_NORMAL;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
sysrq = uart_handle_sysrq_char(port, dma->virt[i]);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (!sysrq)
tty_insert_flip_char(tport, dma->virt[i], flag);
}
msm_start_rx_dma(msm_port);
done:
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
if (count)
tty_flip_buffer_push(tport);
@@ -762,9 +762,9 @@ static void msm_handle_rx_dm(struct uart_port *port, unsigned int misr)
if (!(port->read_status_mask & MSM_UART_SR_RX_BREAK))
flag = TTY_NORMAL;
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
sysrq = uart_handle_sysrq_char(port, buf[i]);
- spin_lock(&port->lock);
+ uart_port_lock(port);
if (!sysrq)
tty_insert_flip_char(tport, buf[i], flag);
}
@@ -824,9 +824,9 @@ static void msm_handle_rx(struct uart_port *port)
else if (sr & MSM_UART_SR_PAR_FRAME_ERR)
flag = TTY_FRAME;
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
sysrq = uart_handle_sysrq_char(port, c);
- spin_lock(&port->lock);
+ uart_port_lock(port);
if (!sysrq)
tty_insert_flip_char(tport, c, flag);
}
@@ -951,7 +951,7 @@ static irqreturn_t msm_uart_irq(int irq, void *dev_id)
unsigned int misr;
u32 val;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
misr = msm_read(port, MSM_UART_MISR);
msm_write(port, 0, MSM_UART_IMR); /* disable interrupt */
@@ -983,7 +983,7 @@ static irqreturn_t msm_uart_irq(int irq, void *dev_id)
msm_handle_delta_cts(port);
msm_write(port, msm_port->imr, MSM_UART_IMR); /* restore interrupt */
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return IRQ_HANDLED;
}
@@ -1128,13 +1128,13 @@ static int msm_set_baud_rate(struct uart_port *port, unsigned int baud,
unsigned long flags, rate;
flags = *saved_flags;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
entry = msm_find_best_baud(port, baud, &rate);
clk_set_rate(msm_port->clk, rate);
baud = rate / 16 / entry->divisor;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
*saved_flags = flags;
port->uartclk = rate;
@@ -1266,7 +1266,7 @@ static void msm_set_termios(struct uart_port *port, struct ktermios *termios,
unsigned long flags;
unsigned int baud, mr;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (dma->chan) /* Terminate if any */
msm_stop_dma(port, dma);
@@ -1338,7 +1338,7 @@ static void msm_set_termios(struct uart_port *port, struct ktermios *termios,
/* Try to use DMA */
msm_start_rx_dma(msm_port);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *msm_type(struct uart_port *port)
@@ -1620,9 +1620,9 @@ static void __msm_console_write(struct uart_port *port, const char *s,
if (port->sysrq)
locked = 0;
else if (oops_in_progress)
- locked = spin_trylock(&port->lock);
+ locked = uart_port_trylock(port);
else
- spin_lock(&port->lock);
+ uart_port_lock(port);
if (is_uartdm)
msm_reset_dm_count(port, count);
@@ -1661,7 +1661,7 @@ static void __msm_console_write(struct uart_port *port, const char *s,
}
if (locked)
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
local_irq_restore(flags);
}
--
2.45.2

113
buildroot-external/patches/linux/0068-serial-mvebu-uart-Use-port-lock-wrappers.patch
View File

@ -1,113 +0,0 @@
From edd893a7c3f9e51bf4e2a8ac4e5080073f179969 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:59 +0206
Subject: [PATCH 068/198] serial: mvebu-uart: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-43-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/mvebu-uart.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c
index ea924e9b913b..0255646bc175 100644
--- a/drivers/tty/serial/mvebu-uart.c
+++ b/drivers/tty/serial/mvebu-uart.c
@@ -187,9 +187,9 @@ static unsigned int mvebu_uart_tx_empty(struct uart_port *port)
unsigned long flags;
unsigned int st;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
st = readl(port->membase + UART_STAT);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return (st & STAT_TX_EMP) ? TIOCSER_TEMT : 0;
}
@@ -249,14 +249,14 @@ static void mvebu_uart_break_ctl(struct uart_port *port, int brk)
unsigned int ctl;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
ctl = readl(port->membase + UART_CTRL(port));
if (brk == -1)
ctl |= CTRL_SND_BRK_SEQ;
else
ctl &= ~CTRL_SND_BRK_SEQ;
writel(ctl, port->membase + UART_CTRL(port));
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void mvebu_uart_rx_chars(struct uart_port *port, unsigned int status)
@@ -540,7 +540,7 @@ static void mvebu_uart_set_termios(struct uart_port *port,
unsigned long flags;
unsigned int baud, min_baud, max_baud;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
port->read_status_mask = STAT_RX_RDY(port) | STAT_OVR_ERR |
STAT_TX_RDY(port) | STAT_TX_FIFO_FUL;
@@ -589,7 +589,7 @@ static void mvebu_uart_set_termios(struct uart_port *port,
uart_update_timeout(port, termios->c_cflag, baud);
}
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *mvebu_uart_type(struct uart_port *port)
@@ -735,9 +735,9 @@ static void mvebu_uart_console_write(struct console *co, const char *s,
int locked = 1;
if (oops_in_progress)
- locked = spin_trylock_irqsave(&port->lock, flags);
+ locked = uart_port_trylock_irqsave(port, &flags);
else
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
ier = readl(port->membase + UART_CTRL(port)) & CTRL_BRK_INT;
intr = readl(port->membase + UART_INTR(port)) &
@@ -758,7 +758,7 @@ static void mvebu_uart_console_write(struct console *co, const char *s,
}
if (locked)
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static int mvebu_uart_console_setup(struct console *co, char *options)
--
2.45.2

185
buildroot-external/patches/linux/0069-serial-omap-Use-port-lock-wrappers.patch
View File

@ -1,185 +0,0 @@
From afbb80a0344372098b821a0c4899d17270fb0a0e Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:44:00 +0206
Subject: [PATCH 069/198] serial: omap: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-44-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/omap-serial.c | 38 ++++++++++++++++----------------
1 file changed, 19 insertions(+), 19 deletions(-)
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 135a838f517a..f4c6ff806465 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -390,10 +390,10 @@ static void serial_omap_throttle(struct uart_port *port)
struct uart_omap_port *up = to_uart_omap_port(port);
unsigned long flags;
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
up->ier &= ~(UART_IER_RLSI | UART_IER_RDI);
serial_out(up, UART_IER, up->ier);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static void serial_omap_unthrottle(struct uart_port *port)
@@ -401,10 +401,10 @@ static void serial_omap_unthrottle(struct uart_port *port)
struct uart_omap_port *up = to_uart_omap_port(port);
unsigned long flags;
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
up->ier |= UART_IER_RLSI | UART_IER_RDI;
serial_out(up, UART_IER, up->ier);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static unsigned int check_modem_status(struct uart_omap_port *up)
@@ -527,7 +527,7 @@ static irqreturn_t serial_omap_irq(int irq, void *dev_id)
irqreturn_t ret = IRQ_NONE;
int max_count = 256;
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
do {
iir = serial_in(up, UART_IIR);
@@ -563,7 +563,7 @@ static irqreturn_t serial_omap_irq(int irq, void *dev_id)
}
} while (max_count--);
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
tty_flip_buffer_push(&up->port.state->port);
@@ -579,9 +579,9 @@ static unsigned int serial_omap_tx_empty(struct uart_port *port)
unsigned int ret = 0;
dev_dbg(up->port.dev, "serial_omap_tx_empty+%d\n", up->port.line);
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
return ret;
}
@@ -647,13 +647,13 @@ static void serial_omap_break_ctl(struct uart_port *port, int break_state)
unsigned long flags;
dev_dbg(up->port.dev, "serial_omap_break_ctl+%d\n", up->port.line);
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
if (break_state == -1)
up->lcr |= UART_LCR_SBC;
else
up->lcr &= ~UART_LCR_SBC;
serial_out(up, UART_LCR, up->lcr);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static int serial_omap_startup(struct uart_port *port)
@@ -701,13 +701,13 @@ static int serial_omap_startup(struct uart_port *port)
* Now, initialize the UART
*/
serial_out(up, UART_LCR, UART_LCR_WLEN8);
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
/*
* Most PC uarts need OUT2 raised to enable interrupts.
*/
up->port.mctrl |= TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
up->msr_saved_flags = 0;
/*
@@ -742,10 +742,10 @@ static void serial_omap_shutdown(struct uart_port *port)
up->ier = 0;
serial_out(up, UART_IER, 0);
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
up->port.mctrl &= ~TIOCM_OUT2;
serial_omap_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
/*
* Disable break condition and FIFOs
@@ -815,7 +815,7 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios,
* Ok, we're now changing the port state. Do it with
* interrupts disabled.
*/
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
/*
* Update the per-port timeout.
@@ -1013,7 +1013,7 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios,
serial_omap_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
dev_dbg(up->port.dev, "serial_omap_set_termios+%d\n", up->port.line);
}
@@ -1216,9 +1216,9 @@ serial_omap_console_write(struct console *co, const char *s,
if (up->port.sysrq)
locked = 0;
else if (oops_in_progress)
- locked = spin_trylock(&up->port.lock);
+ locked = uart_port_trylock(&up->port);
else
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
/*
* First save the IER then disable the interrupts
@@ -1245,7 +1245,7 @@ serial_omap_console_write(struct console *co, const char *s,
check_modem_status(up);
if (locked)
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
local_irq_restore(flags);
}
--
2.45.2

152
buildroot-external/patches/linux/0070-serial-owl-Use-port-lock-wrappers.patch
View File

@ -1,152 +0,0 @@
From 556370f59ed3add619e904352a009448d76dcffb Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:44:01 +0206
Subject: [PATCH 070/198] serial: owl: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-45-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/owl-uart.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/drivers/tty/serial/owl-uart.c b/drivers/tty/serial/owl-uart.c
index e99970a9437f..919f5e5aa0f1 100644
--- a/drivers/tty/serial/owl-uart.c
+++ b/drivers/tty/serial/owl-uart.c
@@ -125,12 +125,12 @@ static unsigned int owl_uart_tx_empty(struct uart_port *port)
u32 val;
unsigned int ret;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
val = owl_uart_read(port, OWL_UART_STAT);
ret = (val & OWL_UART_STAT_TFES) ? TIOCSER_TEMT : 0;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return ret;
}
@@ -232,7 +232,7 @@ static irqreturn_t owl_uart_irq(int irq, void *dev_id)
unsigned long flags;
u32 stat;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
stat = owl_uart_read(port, OWL_UART_STAT);
@@ -246,7 +246,7 @@ static irqreturn_t owl_uart_irq(int irq, void *dev_id)
stat |= OWL_UART_STAT_RIP | OWL_UART_STAT_TIP;
owl_uart_write(port, stat, OWL_UART_STAT);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return IRQ_HANDLED;
}
@@ -256,14 +256,14 @@ static void owl_uart_shutdown(struct uart_port *port)
u32 val;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
val = owl_uart_read(port, OWL_UART_CTL);
val &= ~(OWL_UART_CTL_TXIE | OWL_UART_CTL_RXIE
| OWL_UART_CTL_TXDE | OWL_UART_CTL_RXDE | OWL_UART_CTL_EN);
owl_uart_write(port, val, OWL_UART_CTL);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
free_irq(port->irq, port);
}
@@ -279,7 +279,7 @@ static int owl_uart_startup(struct uart_port *port)
if (ret)
return ret;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
val = owl_uart_read(port, OWL_UART_STAT);
val |= OWL_UART_STAT_RIP | OWL_UART_STAT_TIP
@@ -291,7 +291,7 @@ static int owl_uart_startup(struct uart_port *port)
val |= OWL_UART_CTL_EN;
owl_uart_write(port, val, OWL_UART_CTL);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return 0;
}
@@ -311,7 +311,7 @@ static void owl_uart_set_termios(struct uart_port *port,
u32 ctl;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
ctl = owl_uart_read(port, OWL_UART_CTL);
@@ -371,7 +371,7 @@ static void owl_uart_set_termios(struct uart_port *port,
uart_update_timeout(port, termios->c_cflag, baud);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void owl_uart_release_port(struct uart_port *port)
@@ -515,9 +515,9 @@ static void owl_uart_port_write(struct uart_port *port, const char *s,
if (port->sysrq)
locked = 0;
else if (oops_in_progress)
- locked = spin_trylock(&port->lock);
+ locked = uart_port_trylock(port);
else {
- spin_lock(&port->lock);
+ uart_port_lock(port);
locked = 1;
}
@@ -541,7 +541,7 @@ static void owl_uart_port_write(struct uart_port *port, const char *s,
owl_uart_write(port, old_ctl, OWL_UART_CTL);
if (locked)
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
local_irq_restore(flags);
}
--
2.45.2

85
buildroot-external/patches/linux/0071-serial-pch-Use-port-lock-wrappers.patch
View File

@ -1,85 +0,0 @@
From 787597c3d5c6eccc63a42080a9000b439febc947 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:44:02 +0206
Subject: [PATCH 071/198] serial: pch: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-46-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/pch_uart.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index cc83b772b7ca..436cc6d52a11 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -1347,7 +1347,7 @@ static void pch_uart_set_termios(struct uart_port *port,
baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);
spin_lock_irqsave(&priv->lock, flags);
- spin_lock(&port->lock);
+ uart_port_lock(port);
uart_update_timeout(port, termios->c_cflag, baud);
rtn = pch_uart_hal_set_line(priv, baud, parity, bits, stb);
@@ -1360,7 +1360,7 @@ static void pch_uart_set_termios(struct uart_port *port,
tty_termios_encode_baud_rate(termios, baud, baud);
out:
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
spin_unlock_irqrestore(&priv->lock, flags);
}
@@ -1581,10 +1581,10 @@ pch_console_write(struct console *co, const char *s, unsigned int count)
port_locked = 0;
} else if (oops_in_progress) {
priv_locked = spin_trylock(&priv->lock);
- port_locked = spin_trylock(&priv->port.lock);
+ port_locked = uart_port_trylock(&priv->port);
} else {
spin_lock(&priv->lock);
- spin_lock(&priv->port.lock);
+ uart_port_lock(&priv->port);
}
/*
@@ -1604,7 +1604,7 @@ pch_console_write(struct console *co, const char *s, unsigned int count)
iowrite8(ier, priv->membase + UART_IER);
if (port_locked)
- spin_unlock(&priv->port.lock);
+ uart_port_unlock(&priv->port);
if (priv_locked)
spin_unlock(&priv->lock);
local_irq_restore(flags);
--
2.45.2

123
buildroot-external/patches/linux/0072-serial-pic32-Use-port-lock-wrappers.patch
View File

@ -1,123 +0,0 @@
From 2b19ea0cccf8d64230e831e3e9412738abf3c7b6 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:44:03 +0206
Subject: [PATCH 072/198] serial: pic32: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-47-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/pic32_uart.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/tty/serial/pic32_uart.c b/drivers/tty/serial/pic32_uart.c
index e308d5022b3f..3a95bf5d55d3 100644
--- a/drivers/tty/serial/pic32_uart.c
+++ b/drivers/tty/serial/pic32_uart.c
@@ -243,7 +243,7 @@ static void pic32_uart_break_ctl(struct uart_port *port, int ctl)
struct pic32_sport *sport = to_pic32_sport(port);
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
if (ctl)
pic32_uart_writel(sport, PIC32_SET(PIC32_UART_STA),
@@ -252,7 +252,7 @@ static void pic32_uart_break_ctl(struct uart_port *port, int ctl)
pic32_uart_writel(sport, PIC32_CLR(PIC32_UART_STA),
PIC32_UART_STA_UTXBRK);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
/* get port type in string format */
@@ -274,7 +274,7 @@ static void pic32_uart_do_rx(struct uart_port *port)
*/
max_count = PIC32_UART_RX_FIFO_DEPTH;
- spin_lock(&port->lock);
+ uart_port_lock(port);
tty = &port->state->port;
@@ -331,7 +331,7 @@ static void pic32_uart_do_rx(struct uart_port *port)
} while (--max_count);
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
tty_flip_buffer_push(tty);
}
@@ -410,9 +410,9 @@ static irqreturn_t pic32_uart_tx_interrupt(int irq, void *dev_id)
struct uart_port *port = dev_id;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
pic32_uart_do_tx(port);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return IRQ_HANDLED;
}
@@ -580,9 +580,9 @@ static void pic32_uart_shutdown(struct uart_port *port)
unsigned long flags;
/* disable uart */
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
pic32_uart_dsbl_and_mask(port);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
clk_disable_unprepare(sport->clk);
/* free all 3 interrupts for this UART */
@@ -604,7 +604,7 @@ static void pic32_uart_set_termios(struct uart_port *port,
unsigned int quot;
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* disable uart and mask all interrupts while changing speed */
pic32_uart_dsbl_and_mask(port);
@@ -672,7 +672,7 @@ static void pic32_uart_set_termios(struct uart_port *port,
/* enable uart */
pic32_uart_en_and_unmask(port);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
/* serial core request to claim uart iomem */
--
2.45.2

237
buildroot-external/patches/linux/0073-serial-pmac_zilog-Use-port-lock-wrappers.patch
View File

@ -1,237 +0,0 @@
From 624b479df0eadf4c24e78331cd977bf078dd0efd Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:44:04 +0206
Subject: [PATCH 073/198] serial: pmac_zilog: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-48-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/pmac_zilog.c | 52 ++++++++++++++++-----------------
1 file changed, 26 insertions(+), 26 deletions(-)
diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index 29bc80d39e8b..77691fbbf779 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -245,9 +245,9 @@ static bool pmz_receive_chars(struct uart_pmac_port *uap)
#endif /* USE_CTRL_O_SYSRQ */
if (uap->port.sysrq) {
int swallow;
- spin_unlock(&uap->port.lock);
+ uart_port_unlock(&uap->port);
swallow = uart_handle_sysrq_char(&uap->port, ch);
- spin_lock(&uap->port.lock);
+ uart_port_lock(&uap->port);
if (swallow)
goto next_char;
}
@@ -421,7 +421,7 @@ static irqreturn_t pmz_interrupt(int irq, void *dev_id)
uap_a = pmz_get_port_A(uap);
uap_b = uap_a->mate;
- spin_lock(&uap_a->port.lock);
+ uart_port_lock(&uap_a->port);
r3 = read_zsreg(uap_a, R3);
/* Channel A */
@@ -442,14 +442,14 @@ static irqreturn_t pmz_interrupt(int irq, void *dev_id)
rc = IRQ_HANDLED;
}
skip_a:
- spin_unlock(&uap_a->port.lock);
+ uart_port_unlock(&uap_a->port);
if (push)
tty_flip_buffer_push(&uap->port.state->port);
if (!uap_b)
goto out;
- spin_lock(&uap_b->port.lock);
+ uart_port_lock(&uap_b->port);
push = false;
if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) {
if (!ZS_IS_OPEN(uap_b)) {
@@ -467,7 +467,7 @@ static irqreturn_t pmz_interrupt(int irq, void *dev_id)
rc = IRQ_HANDLED;
}
skip_b:
- spin_unlock(&uap_b->port.lock);
+ uart_port_unlock(&uap_b->port);
if (push)
tty_flip_buffer_push(&uap->port.state->port);
@@ -483,9 +483,9 @@ static inline u8 pmz_peek_status(struct uart_pmac_port *uap)
unsigned long flags;
u8 status;
- spin_lock_irqsave(&uap->port.lock, flags);
+ uart_port_lock_irqsave(&uap->port, &flags);
status = read_zsreg(uap, R0);
- spin_unlock_irqrestore(&uap->port.lock, flags);
+ uart_port_unlock_irqrestore(&uap->port, flags);
return status;
}
@@ -671,7 +671,7 @@ static void pmz_break_ctl(struct uart_port *port, int break_state)
else
clear_bits |= SND_BRK;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
new_reg = (uap->curregs[R5] | set_bits) & ~clear_bits;
if (new_reg != uap->curregs[R5]) {
@@ -679,7 +679,7 @@ static void pmz_break_ctl(struct uart_port *port, int break_state)
write_zsreg(uap, R5, uap->curregs[R5]);
}
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
#ifdef CONFIG_PPC_PMAC
@@ -851,18 +851,18 @@ static void pmz_irda_reset(struct uart_pmac_port *uap)
{
unsigned long flags;
- spin_lock_irqsave(&uap->port.lock, flags);
+ uart_port_lock_irqsave(&uap->port, &flags);
uap->curregs[R5] |= DTR;
write_zsreg(uap, R5, uap->curregs[R5]);
zssync(uap);
- spin_unlock_irqrestore(&uap->port.lock, flags);
+ uart_port_unlock_irqrestore(&uap->port, flags);
msleep(110);
- spin_lock_irqsave(&uap->port.lock, flags);
+ uart_port_lock_irqsave(&uap->port, &flags);
uap->curregs[R5] &= ~DTR;
write_zsreg(uap, R5, uap->curregs[R5]);
zssync(uap);
- spin_unlock_irqrestore(&uap->port.lock, flags);
+ uart_port_unlock_irqrestore(&uap->port, flags);
msleep(10);
}
@@ -882,9 +882,9 @@ static int pmz_startup(struct uart_port *port)
* initialize the chip
*/
if (!ZS_IS_CONS(uap)) {
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
pwr_delay = __pmz_startup(uap);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
sprintf(uap->irq_name, PMACZILOG_NAME"%d", uap->port.line);
if (request_irq(uap->port.irq, pmz_interrupt, IRQF_SHARED,
@@ -907,9 +907,9 @@ static int pmz_startup(struct uart_port *port)
pmz_irda_reset(uap);
/* Enable interrupt requests for the channel */
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
pmz_interrupt_control(uap, 1);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return 0;
}
@@ -919,7 +919,7 @@ static void pmz_shutdown(struct uart_port *port)
struct uart_pmac_port *uap = to_pmz(port);
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Disable interrupt requests for the channel */
pmz_interrupt_control(uap, 0);
@@ -934,19 +934,19 @@ static void pmz_shutdown(struct uart_port *port)
pmz_maybe_update_regs(uap);
}
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
/* Release interrupt handler */
free_irq(uap->port.irq, uap);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
uap->flags &= ~PMACZILOG_FLAG_IS_OPEN;
if (!ZS_IS_CONS(uap))
pmz_set_scc_power(uap, 0); /* Shut the chip down */
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
/* Shared by TTY driver and serial console setup. The port lock is held
@@ -1233,7 +1233,7 @@ static void pmz_set_termios(struct uart_port *port, struct ktermios *termios,
struct uart_pmac_port *uap = to_pmz(port);
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Disable IRQs on the port */
pmz_interrupt_control(uap, 0);
@@ -1245,7 +1245,7 @@ static void pmz_set_termios(struct uart_port *port, struct ktermios *termios,
if (ZS_IS_OPEN(uap))
pmz_interrupt_control(uap, 1);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *pmz_type(struct uart_port *port)
@@ -1882,7 +1882,7 @@ static void pmz_console_write(struct console *con, const char *s, unsigned int c
struct uart_pmac_port *uap = &pmz_ports[con->index];
unsigned long flags;
- spin_lock_irqsave(&uap->port.lock, flags);
+ uart_port_lock_irqsave(&uap->port, &flags);
/* Turn of interrupts and enable the transmitter. */
write_zsreg(uap, R1, uap->curregs[1] & ~TxINT_ENAB);
@@ -1894,7 +1894,7 @@ static void pmz_console_write(struct console *con, const char *s, unsigned int c
write_zsreg(uap, R1, uap->curregs[1]);
/* Don't disable the transmitter. */
- spin_unlock_irqrestore(&uap->port.lock, flags);
+ uart_port_unlock_irqrestore(&uap->port, flags);
}
/*
--
2.45.2

155
buildroot-external/patches/linux/0074-serial-pxa-Use-port-lock-wrappers.patch
View File

@ -1,155 +0,0 @@
From 82029c6e95019551ecac0865e6c24ac7a1e52a96 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:44:05 +0206
Subject: [PATCH 074/198] serial: pxa: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-49-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/pxa.c | 30 +++++++++++++++---------------
1 file changed, 15 insertions(+), 15 deletions(-)
diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c
index 73c60f5ea027..46e70e155aab 100644
--- a/drivers/tty/serial/pxa.c
+++ b/drivers/tty/serial/pxa.c
@@ -225,14 +225,14 @@ static inline irqreturn_t serial_pxa_irq(int irq, void *dev_id)
iir = serial_in(up, UART_IIR);
if (iir & UART_IIR_NO_INT)
return IRQ_NONE;
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
lsr = serial_in(up, UART_LSR);
if (lsr & UART_LSR_DR)
receive_chars(up, &lsr);
check_modem_status(up);
if (lsr & UART_LSR_THRE)
transmit_chars(up);
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
return IRQ_HANDLED;
}
@@ -242,9 +242,9 @@ static unsigned int serial_pxa_tx_empty(struct uart_port *port)
unsigned long flags;
unsigned int ret;
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
return ret;
}
@@ -295,13 +295,13 @@ static void serial_pxa_break_ctl(struct uart_port *port, int break_state)
struct uart_pxa_port *up = (struct uart_pxa_port *)port;
unsigned long flags;
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
if (break_state == -1)
up->lcr |= UART_LCR_SBC;
else
up->lcr &= ~UART_LCR_SBC;
serial_out(up, UART_LCR, up->lcr);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static int serial_pxa_startup(struct uart_port *port)
@@ -346,10 +346,10 @@ static int serial_pxa_startup(struct uart_port *port)
*/
serial_out(up, UART_LCR, UART_LCR_WLEN8);
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
up->port.mctrl |= TIOCM_OUT2;
serial_pxa_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
/*
* Finally, enable interrupts. Note: Modem status interrupts
@@ -383,10 +383,10 @@ static void serial_pxa_shutdown(struct uart_port *port)
up->ier = 0;
serial_out(up, UART_IER, 0);
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
up->port.mctrl &= ~TIOCM_OUT2;
serial_pxa_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
/*
* Disable break condition and FIFOs
@@ -434,7 +434,7 @@ serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios,
* Ok, we're now changing the port state. Do it with
* interrupts disabled.
*/
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
/*
* Ensure the port will be enabled.
@@ -504,7 +504,7 @@ serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios,
up->lcr = cval; /* Save LCR */
serial_pxa_set_mctrl(&up->port, up->port.mctrl);
serial_out(up, UART_FCR, fcr);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
}
static void
@@ -608,9 +608,9 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
if (up->port.sysrq)
locked = 0;
else if (oops_in_progress)
- locked = spin_trylock(&up->port.lock);
+ locked = uart_port_trylock(&up->port);
else
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
/*
* First save the IER then disable the interrupts
@@ -628,7 +628,7 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
serial_out(up, UART_IER, ier);
if (locked)
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
local_irq_restore(flags);
clk_disable(up->clk);
--
2.45.2

76
buildroot-external/patches/linux/0075-serial-qcom-geni-Use-port-lock-wrappers.patch
View File

@ -1,76 +0,0 @@
From 966806d649a35aa824a2b2a8223c9bf0d4193270 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:44:06 +0206
Subject: [PATCH 075/198] serial: qcom-geni: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-50-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/qcom_geni_serial.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 2e1b1c827dfe..549909644011 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -482,9 +482,9 @@ static void qcom_geni_serial_console_write(struct console *co, const char *s,
uport = &port->uport;
if (oops_in_progress)
- locked = spin_trylock_irqsave(&uport->lock, flags);
+ locked = uart_port_trylock_irqsave(uport, &flags);
else
- spin_lock_irqsave(&uport->lock, flags);
+ uart_port_lock_irqsave(uport, &flags);
geni_status = readl(uport->membase + SE_GENI_STATUS);
@@ -520,7 +520,7 @@ static void qcom_geni_serial_console_write(struct console *co, const char *s,
qcom_geni_serial_setup_tx(uport, port->tx_remaining);
if (locked)
- spin_unlock_irqrestore(&uport->lock, flags);
+ uart_port_unlock_irqrestore(uport, flags);
}
static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
@@ -972,7 +972,7 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev)
if (uport->suspended)
return IRQ_NONE;
- spin_lock(&uport->lock);
+ uart_port_lock(uport);
m_irq_status = readl(uport->membase + SE_GENI_M_IRQ_STATUS);
s_irq_status = readl(uport->membase + SE_GENI_S_IRQ_STATUS);
--
2.45.2

182
buildroot-external/patches/linux/0076-serial-rda-Use-port-lock-wrappers.patch
View File

@ -1,182 +0,0 @@
From 62462308af959e397122c1a6219761e049471bec Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:44:07 +0206
Subject: [PATCH 076/198] serial: rda: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-51-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/rda-uart.c | 34 +++++++++++++++++-----------------
1 file changed, 17 insertions(+), 17 deletions(-)
diff --git a/drivers/tty/serial/rda-uart.c b/drivers/tty/serial/rda-uart.c
index be5c842b5ba9..d824c8318f33 100644
--- a/drivers/tty/serial/rda-uart.c
+++ b/drivers/tty/serial/rda-uart.c
@@ -139,12 +139,12 @@ static unsigned int rda_uart_tx_empty(struct uart_port *port)
unsigned int ret;
u32 val;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
val = rda_uart_read(port, RDA_UART_STATUS);
ret = (val & RDA_UART_TX_FIFO_MASK) ? TIOCSER_TEMT : 0;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return ret;
}
@@ -246,7 +246,7 @@ static void rda_uart_set_termios(struct uart_port *port,
unsigned int baud;
u32 irq_mask;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
baud = uart_get_baud_rate(port, termios, old, 9600, port->uartclk / 4);
rda_uart_change_baudrate(rda_port, baud);
@@ -325,7 +325,7 @@ static void rda_uart_set_termios(struct uart_port *port,
/* update the per-port timeout */
uart_update_timeout(port, termios->c_cflag, baud);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void rda_uart_send_chars(struct uart_port *port)
@@ -408,7 +408,7 @@ static irqreturn_t rda_interrupt(int irq, void *dev_id)
unsigned long flags;
u32 val, irq_mask;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* Clear IRQ cause */
val = rda_uart_read(port, RDA_UART_IRQ_CAUSE);
@@ -425,7 +425,7 @@ static irqreturn_t rda_interrupt(int irq, void *dev_id)
rda_uart_send_chars(port);
}
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return IRQ_HANDLED;
}
@@ -436,16 +436,16 @@ static int rda_uart_startup(struct uart_port *port)
int ret;
u32 val;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
rda_uart_write(port, 0, RDA_UART_IRQ_MASK);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
ret = request_irq(port->irq, rda_interrupt, IRQF_NO_SUSPEND,
"rda-uart", port);
if (ret)
return ret;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
val = rda_uart_read(port, RDA_UART_CTRL);
val |= RDA_UART_ENABLE;
@@ -456,7 +456,7 @@ static int rda_uart_startup(struct uart_port *port)
val |= (RDA_UART_RX_DATA_AVAILABLE | RDA_UART_RX_TIMEOUT);
rda_uart_write(port, val, RDA_UART_IRQ_MASK);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return 0;
}
@@ -466,7 +466,7 @@ static void rda_uart_shutdown(struct uart_port *port)
unsigned long flags;
u32 val;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
rda_uart_stop_tx(port);
rda_uart_stop_rx(port);
@@ -475,7 +475,7 @@ static void rda_uart_shutdown(struct uart_port *port)
val &= ~RDA_UART_ENABLE;
rda_uart_write(port, val, RDA_UART_CTRL);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *rda_uart_type(struct uart_port *port)
@@ -515,7 +515,7 @@ static void rda_uart_config_port(struct uart_port *port, int flags)
rda_uart_request_port(port);
}
- spin_lock_irqsave(&port->lock, irq_flags);
+ uart_port_lock_irqsave(port, &irq_flags);
/* Clear mask, so no surprise interrupts. */
rda_uart_write(port, 0, RDA_UART_IRQ_MASK);
@@ -523,7 +523,7 @@ static void rda_uart_config_port(struct uart_port *port, int flags)
/* Clear status register */
rda_uart_write(port, 0, RDA_UART_STATUS);
- spin_unlock_irqrestore(&port->lock, irq_flags);
+ uart_port_unlock_irqrestore(port, irq_flags);
}
static void rda_uart_release_port(struct uart_port *port)
@@ -597,9 +597,9 @@ static void rda_uart_port_write(struct uart_port *port, const char *s,
if (port->sysrq) {
locked = 0;
} else if (oops_in_progress) {
- locked = spin_trylock(&port->lock);
+ locked = uart_port_trylock(port);
} else {
- spin_lock(&port->lock);
+ uart_port_lock(port);
locked = 1;
}
@@ -615,7 +615,7 @@ static void rda_uart_port_write(struct uart_port *port, const char *s,
rda_uart_write(port, old_irq_mask, RDA_UART_IRQ_MASK);
if (locked)
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
local_irq_restore(flags);
}
--
2.45.2

119
buildroot-external/patches/linux/0077-serial-rp2-Use-port-lock-wrappers.patch
View File

@ -1,119 +0,0 @@
From 0a9667b3c4f1f1fc911c939e86a18a7f59a37073 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:44:08 +0206
Subject: [PATCH 077/198] serial: rp2: Use port lock wrappers
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
To avoid adding this functionality to all UART drivers, wrap the
spin_[un]lock*() invocations for uart_port::lock into helper functions
which just contain the spin_[un]lock*() invocations for now. In a
subsequent step these helpers will gain the console synchronization
mechanisms.
Converted with coccinelle. No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-52-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
drivers/tty/serial/rp2.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/tty/serial/rp2.c b/drivers/tty/serial/rp2.c
index de220ac8ca54..d46a81cddfcd 100644
--- a/drivers/tty/serial/rp2.c
+++ b/drivers/tty/serial/rp2.c
@@ -276,9 +276,9 @@ static unsigned int rp2_uart_tx_empty(struct uart_port *port)
* But the TXEMPTY bit doesn't seem to work unless the TX IRQ is
* enabled.
*/
- spin_lock_irqsave(&up->port.lock, flags);
+ uart_port_lock_irqsave(&up->port, &flags);
tx_fifo_bytes = readw(up->base + RP2_TX_FIFO_COUNT);
- spin_unlock_irqrestore(&up->port.lock, flags);
+ uart_port_unlock_irqrestore(&up->port, flags);
return tx_fifo_bytes ? 0 : TIOCSER_TEMT;
}
@@ -323,10 +323,10 @@ static void rp2_uart_break_ctl(struct uart_port *port, int break_state)
{
unsigned long flags;
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
rp2_rmw(port_to_up(port), RP2_TXRX_CTL, RP2_TXRX_CTL_BREAK_m,
break_state ? RP2_TXRX_CTL_BREAK_m : 0);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void rp2_uart_enable_ms(struct uart_port *port)
@@ -383,7 +383,7 @@ static void rp2_uart_set_termios(struct uart_port *port, struct ktermios *new,
if (tty_termios_baud_rate(new))
tty_termios_encode_baud_rate(new, baud, baud);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
/* ignore all characters if CREAD is not set */
port->ignore_status_mask = (new->c_cflag & CREAD) ? 0 : RP2_DUMMY_READ;
@@ -391,7 +391,7 @@ static void rp2_uart_set_termios(struct uart_port *port, struct ktermios *new,
__rp2_uart_set_termios(up, new->c_cflag, new->c_iflag, baud_div);
uart_update_timeout(port, new->c_cflag, baud);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static void rp2_rx_chars(struct rp2_uart_port *up)
@@ -440,7 +440,7 @@ static void rp2_ch_interrupt(struct rp2_uart_port *up)
{
u32 status;
- spin_lock(&up->port.lock);
+ uart_port_lock(&up->port);
/*
* The IRQ status bits are clear-on-write. Other status bits in
@@ -456,7 +456,7 @@ static void rp2_ch_interrupt(struct rp2_uart_port *up)
if (status & RP2_CHAN_STAT_MS_CHANGED_MASK)
wake_up_interruptible(&up->port.state->port.delta_msr_wait);
- spin_unlock(&up->port.lock);
+ uart_port_unlock(&up->port);
}
static int rp2_asic_interrupt(struct rp2_card *card, unsigned int asic_id)
@@ -516,10 +516,10 @@ static void rp2_uart_shutdown(struct uart_port *port)
rp2_uart_break_ctl(port, 0);
- spin_lock_irqsave(&port->lock, flags);
+ uart_port_lock_irqsave(port, &flags);
rp2_mask_ch_irq(up, up->idx, 0);
rp2_rmw(up, RP2_CHAN_STAT, 0, 0);
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
static const char *rp2_uart_type(struct uart_port *port)
--
2.45.2

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