From: Marek Olšák <marek.olsak@xxxxxxx>
Userspace will be able to tell whether a GPU reset occured by comparing
an old referece value of the counter with a new value.
Signed-off-by: Marek Olšák <marek.olsak@xxxxxxx>
---
drivers/gpu/drm/radeon/radeon.h | 1 +
drivers/gpu/drm/radeon/radeon_device.c | 2 ++
drivers/gpu/drm/radeon/radeon_drv.c | 3 ++-
drivers/gpu/drm/radeon/radeon_kms.c | 3 +++
include/uapi/drm/radeon_drm.h | 1 +
5 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index d2abe48..c2b345a 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -2436,6 +2436,7 @@ struct radeon_device {
atomic64_t vram_usage;
atomic64_t gtt_usage;
atomic64_t num_bytes_moved;
+ atomic_t gpu_reset_counter;
/* ACPI interface */
struct radeon_atif atif;
struct radeon_atcs atcs;
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index b7ca4c5..13e207e 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -1725,6 +1725,8 @@ int radeon_gpu_reset(struct radeon_device *rdev)
return 0;
}
+ atomic_inc(&rdev->gpu_reset_counter);
+
radeon_save_bios_scratch_regs(rdev);
/* block TTM */
resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index 7d620d4..5751446 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -90,9 +90,10 @@
* CS to GPU on >= r600
* 2.41.0 - evergreen/cayman: Add SET_BASE/DRAW_INDIRECT command parsing support
* 2.42.0 - Add VCE/VUI (Video Usability Information) support
+ * 2.43.0 - RADEON_INFO_GPU_RESET_COUNTER
*/
#define KMS_DRIVER_MAJOR 2
-#define KMS_DRIVER_MINOR 42
+#define KMS_DRIVER_MINOR 43
#define KMS_DRIVER_PATCHLEVEL 0
int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags);
int radeon_driver_unload_kms(struct drm_device *dev);
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 7b2a733..9632e88 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -576,6 +576,9 @@ static int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file
if (radeon_get_allowed_info_register(rdev, *value, value))
return -EINVAL;
break;
+ case RADEON_INFO_GPU_RESET_COUNTER:
+ *value = atomic_read(&rdev->gpu_reset_counter);
+ break;
default:
DRM_DEBUG_KMS("Invalid request %d\n", info->request);
return -EINVAL;
diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h
index 871e73f..573cb86 100644
--- a/include/uapi/drm/radeon_drm.h
+++ b/include/uapi/drm/radeon_drm.h
@@ -1038,6 +1038,7 @@ struct drm_radeon_cs {
#define RADEON_INFO_CURRENT_GPU_SCLK 0x22
#define RADEON_INFO_CURRENT_GPU_MCLK 0x23
#define RADEON_INFO_READ_REG 0x24
+#define RADEON_INFO_GPU_RESET_COUNTER 0x25
struct drm_radeon_info {
uint32_t request;
--
2.1.0
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