This flag used to avoid calling mem_sync without need.
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@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 3 ++-
drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 3 +++
include/uapi/drm/amdgpu_drm.h | 4 ++++
3 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 28bb840..f18d974 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -85,9 +85,10 @@
* - 3.34.0 - Non-DC can flip correctly between buffers with different pitches
* - 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 - Add AMDGPU_IB_FLAG_EMIT_MEM_SYNC
*/
#define KMS_DRIVER_MAJOR 3
-#define KMS_DRIVER_MINOR 36
+#define KMS_DRIVER_MINOR 37
#define KMS_DRIVER_PATCHLEVEL 0
int amdgpu_vram_limit = 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index bece01f..a8aa787 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -182,6 +182,9 @@ 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);
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index cfbec27..5f7a4f5 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -601,6 +601,10 @@ 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_* */
--
2.7.4
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