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drm/amdgpu: Add a UAPI flag for user to call mem_sync 

When this flag is set in the CS IB flags, it causes
a memory cache flush of the GFX.

v2:
Move new flag to drm_amdgpu_cs_chunk_ib.flags
Bump up UAPI version
Remove condition on job != null to emit mem_sync

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Andrey Grodzovsky 2020-04-28 01:28:43 -04:00 committed by Alex Deucher
parent d35745bbec
commit 43c8546bcd
3 changed files with 9 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
View File

@ -86,9 +86,10 @@
* - 3.35.0 - Add drm_amdgpu_info_device::tcc_disabled_mask
* - 3.36.0 - Allow reading more status registers on si/cik
* - 3.37.0 - L2 is invalidated before SDMA IBs, needed for correctness
* - 3.38.0 - Add AMDGPU_IB_FLAG_EMIT_MEM_SYNC
*/
#define KMS_DRIVER_MAJOR 3
#define KMS_DRIVER_MINOR 37
#define KMS_DRIVER_MINOR 38
#define KMS_DRIVER_PATCHLEVEL 0
int amdgpu_vram_limit = 0;

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

@ -189,6 +189,9 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
dma_fence_put(tmp);
}
if ((ib->flags & AMDGPU_IB_FLAG_EMIT_MEM_SYNC) && ring->funcs->emit_mem_sync)
ring->funcs->emit_mem_sync(ring);
if (ring->funcs->insert_start)
ring->funcs->insert_start(ring);

4
include/uapi/drm/amdgpu_drm.h
View File

@ -602,6 +602,10 @@ union drm_amdgpu_cs {
*/
#define AMDGPU_IB_FLAGS_SECURE (1 << 5)
/* Tell KMD to flush and invalidate caches
*/
#define AMDGPU_IB_FLAG_EMIT_MEM_SYNC (1 << 6)
struct drm_amdgpu_cs_chunk_ib {
__u32 _pad;
/** AMDGPU_IB_FLAG_* */