From: Shashank Sharma <shashank.sharma@xxxxxxx>
This patch adds a work function, which will get scheduled
in event of a GPU reset, and will send a uevent to user with
some reset context infomration, like a PID and some flags.
The userspace can do some recovery and post-processing work
based on this event.
V2:
- Changed the name of the work to gpu_reset_event_work
(Christian)
- Added a structure to accommodate some additional information
(like a PID and some flags)
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 | 7 +++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 19 +++++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index d8b854fcbffa..7df219fe363f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -813,6 +813,11 @@ struct amd_powerplay {
#define AMDGPU_RESET_MAGIC_NUM 64
#define AMDGPU_MAX_DF_PERFMONS 4
#define AMDGPU_PRODUCT_NAME_LEN 64
+struct amdgpu_reset_event_ctx {
+ uint64_t pid;
+ uint32_t flags;
+};
+
struct amdgpu_device {
struct device *dev;
struct pci_dev *pdev;
@@ -1063,6 +1068,7 @@ struct amdgpu_device {
int asic_reset_res;
struct work_struct xgmi_reset_work;
+ struct work_struct gpu_reset_event_work;
struct list_head reset_list;
long gfx_timeout;
@@ -1097,6 +1103,7 @@ struct amdgpu_device {
pci_channel_state_t pci_channel_state;
struct amdgpu_reset_control *reset_cntl;
+ struct amdgpu_reset_event_ctx reset_event_ctx;
uint32_t ip_versions[MAX_HWIP][HWIP_MAX_INSTANCE];
bool ram_is_direct_mapped;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index ed077de426d9..c43d099da06d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -73,6 +73,7 @@
#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");
@@ -3277,6 +3278,23 @@ bool amdgpu_device_has_dc_support(struct amdgpu_device *adev)
return amdgpu_device_asic_has_dc_support(adev->asic_type);
}
+static void amdgpu_device_reset_event_func(struct work_struct *__work)
+{
+ struct amdgpu_device *adev = container_of(__work, struct amdgpu_device,
+ gpu_reset_event_work);
+ struct amdgpu_reset_event_ctx *event_ctx = &adev->reset_event_ctx;
+
+ /*
+ * A GPU reset has happened, indicate the userspace and pass the
+ * following information:
+ * - pid of the process involved,
+ * - if the VRAM is valid or not,
+ * - indicate that userspace may want to collect the ftrace event
+ * data from the trace event.
+ */
+ drm_sysfs_reset_event(&adev->ddev, event_ctx->pid, event_ctx->flags);
+}
+
static void amdgpu_device_xgmi_reset_func(struct work_struct *__work)
{
struct amdgpu_device *adev =
@@ -3525,6 +3543,7 @@ 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_event_work, amdgpu_device_reset_event_func);
adev->gfx.gfx_off_req_count = 1;
adev->pm.ac_power = power_supply_is_system_supplied() > 0;
--
2.32.0
