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authorMarek Olšák <marek.olsak@amd.com>2015-04-29 20:40:33 +0300
committerAlex Deucher <alexander.deucher@amd.com>2015-05-26 17:31:19 +0300
commit72b9076b2887add930d3b102760f09d02ffbfbe7 (patch)
tree8eba67d708f9d5c79661d65fc72122fe5f2ac241
parentc6e7e4bb7ff988e7f915526a80ea866d84aac720 (diff)
downloadlinux-72b9076b2887add930d3b102760f09d02ffbfbe7.tar.xz
drm/radeon: add a GPU reset counter queryable by userspace
Userspace will be able to tell whether a GPU reset occured by comparing an old referece value of the counter with a new value. Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Marek Olšák <marek.olsak@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
-rw-r--r--drivers/gpu/drm/radeon/radeon.h1
-rw-r--r--drivers/gpu/drm/radeon/radeon_device.c2
-rw-r--r--drivers/gpu/drm/radeon/radeon_drv.c3
-rw-r--r--drivers/gpu/drm/radeon/radeon_kms.c3
-rw-r--r--include/uapi/drm/radeon_drm.h1
5 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 46eb0fa75a61..352870cbb8b8 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -2435,6 +2435,7 @@ 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 b7ca4c514621..13e207e0dff0 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 7d620d4b3f31..5751446677d3 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 7b2a7335cc5d..9632e886ddc3 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 871e73f99a4d..573cb86a3d6e 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;