Am 21.05.21 um 04:22 schrieb Felix Kuehling:
KFD userptr BOs and SG BOs used for DMA mappings can be preempted with
CWSR. Therefore we can use preemptible placement and avoid unwanted
evictions due to GTT accounting.
Signed-off-by: Felix Kuehling <[email protected]>
Acked-by: Christian König <[email protected]>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 928e8d57cd08..2b8b89535198 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -621,8 +621,8 @@ kfd_mem_attach_userptr(struct amdgpu_device *adev, struct
kgd_mem *mem,
ret = amdgpu_gem_object_create(adev, bo_size, 1,
AMDGPU_GEM_DOMAIN_CPU,
- 0, ttm_bo_type_sg,
- mem->bo->tbo.base.resv,
+ AMDGPU_GEM_CREATE_PREEMPTIBLE,
+ ttm_bo_type_sg, mem->bo->tbo.base.resv,
&gobj);
if (ret)
return ret;
@@ -662,6 +662,7 @@ kfd_mem_attach_dmabuf(struct amdgpu_device *adev, struct
kgd_mem *mem,
dma_buf_put(mem->dmabuf);
*bo = gem_to_amdgpu_bo(gobj);
+ (*bo)->flags |= AMDGPU_GEM_CREATE_PREEMPTIBLE;
(*bo)->parent = amdgpu_bo_ref(mem->bo);
return 0;
@@ -1410,7 +1411,7 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
} else if (flags & KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) {
domain = AMDGPU_GEM_DOMAIN_GTT;
alloc_domain = AMDGPU_GEM_DOMAIN_CPU;
- alloc_flags = 0;
+ alloc_flags = AMDGPU_GEM_CREATE_PREEMPTIBLE;
if (!offset || !*offset)
return -EINVAL;
user_addr = untagged_addr(*offset);
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