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drm/amdgpu: Add AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES

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New chunk for dependency on start of job's execution instead on
the end. This is used for GPU deadlock prevention when
userspace uses mid-IB fences to wait for mid-IB work on other rings.

v2: Fix typo in AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES
v3: Bump KMS version
v4: put old fence AFTER acquiring the scheduled fence.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Suggested-by: Christian Koenig <Christian.Koenig@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Andrey Grodzovsky 2019-01-31 15:44:22 -05:00 committed by Alex Deucher
parent 373e87fc91
commit 67dd1a3633
3 changed files with 15 additions and 2 deletions
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13
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
View File

@ -214,6 +214,7 @@ static int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p, union drm_amdgpu_cs
case AMDGPU_CHUNK_ID_DEPENDENCIES:
case AMDGPU_CHUNK_ID_SYNCOBJ_IN:
case AMDGPU_CHUNK_ID_SYNCOBJ_OUT:
case AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES:
break;
default:
@ -1090,6 +1091,15 @@ static int amdgpu_cs_process_fence_dep(struct amdgpu_cs_parser *p,
fence = amdgpu_ctx_get_fence(ctx, entity,
deps[i].handle);
if (chunk->chunk_id == AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES) {
struct drm_sched_fence *s_fence = to_drm_sched_fence(fence);
struct dma_fence *old = fence;
fence = dma_fence_get(&s_fence->scheduled);
dma_fence_put(old);
}
if (IS_ERR(fence)) {
r = PTR_ERR(fence);
amdgpu_ctx_put(ctx);
@ -1177,7 +1187,8 @@ static int amdgpu_cs_dependencies(struct amdgpu_device *adev,
chunk = &p->chunks[i];
if (chunk->chunk_id == AMDGPU_CHUNK_ID_DEPENDENCIES) {
if (chunk->chunk_id == AMDGPU_CHUNK_ID_DEPENDENCIES ||
chunk->chunk_id == AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES) {
r = amdgpu_cs_process_fence_dep(p, chunk);
if (r)
return r;

3
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
View File

@ -71,9 +71,10 @@
* - 3.25.0 - Add support for sensor query info (stable pstate sclk/mclk).
* - 3.26.0 - GFX9: Process AMDGPU_IB_FLAG_TC_WB_NOT_INVALIDATE.
* - 3.27.0 - Add new chunk to to AMDGPU_CS to enable BO_LIST creation.
* - 3.28.0 - Add AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES
*/
#define KMS_DRIVER_MAJOR 3
#define KMS_DRIVER_MINOR 27
#define KMS_DRIVER_MINOR 28
#define KMS_DRIVER_PATCHLEVEL 0
int amdgpu_vram_limit = 0;

1
include/uapi/drm/amdgpu_drm.h
View File

@ -523,6 +523,7 @@ struct drm_amdgpu_gem_va {
#define AMDGPU_CHUNK_ID_SYNCOBJ_IN 0x04
#define AMDGPU_CHUNK_ID_SYNCOBJ_OUT 0x05
#define AMDGPU_CHUNK_ID_BO_HANDLES 0x06
#define AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES 0x07
struct drm_amdgpu_cs_chunk {
__u32 chunk_id;