From c598dd586dd15fc5ae0a883a2e6f4094ec024085 Mon Sep 17 00:00:00 2001
From: Shashank Sharma <shashank.sharma@xxxxxxx>
Date: Fri, 21 Jan 2022 17:33:10 +0100
Subject: [PATCH 2/4] drm/amdgpu: add work function for GPU reset
This patch adds a new work function, which will get scheduled
in event of a GPU reset, and will send a uevent to indicate the same.
The userspace can do some post-processing work like collecting data
from a trace event.
Cc: Alexander Deucher <alexander.deucher@xxxxxxx>
Cc: Christian Koenig <christian.koenig@xxxxxxx>
Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 14 ++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 269437b01328..79192f43bb71 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1057,6 +1057,8 @@ struct amdgpu_device {
struct work_struct xgmi_reset_work;
struct list_head reset_list;
+ struct work_struct gpu_reset_work;
+
long gfx_timeout;
long sdma_timeout;
long video_timeout;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index af9bdf16eefd..e29e58240869 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -72,6 +72,7 @@
#include <linux/pm_runtime.h>
#include <drm/drm_drv.h>
+#include <drm/drm_sysfs.h>
MODULE_FIRMWARE("amdgpu/vega10_gpu_info.bin");
MODULE_FIRMWARE("amdgpu/vega12_gpu_info.bin");
@@ -3274,6 +3275,18 @@ bool amdgpu_device_has_dc_support(struct
amdgpu_device *adev)
return amdgpu_device_asic_has_dc_support(adev->asic_type);
}
+static void amdgpu_device_gpu_reset_func(struct work_struct *__work)
+{
+ struct amdgpu_device *adev =
+ container_of(__work, struct amdgpu_device, gpu_reset_work);
+
+ /*
+ * Inform userspace that a GPU reset happened, and it should collect
+ * data from the trace event.
+ */
+ drm_sysfs_gpu_reset_event(&adev->ddev);
+}
+
static void amdgpu_device_xgmi_reset_func(struct work_struct *__work)
{
struct amdgpu_device *adev =
@@ -3506,6 +3519,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
amdgpu_device_delay_enable_gfx_off);
INIT_WORK(&adev->xgmi_reset_work, amdgpu_device_xgmi_reset_func);
+ INIT_WORK(&adev->gpu_reset_work, amdgpu_device_gpu_reset_func);
adev->gfx.gfx_off_req_count = 1;
adev->pm.ac_power = power_supply_is_system_supplied() > 0;
--
2.32.0
