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drm/amdkfd: Share the original BO for GTT mapping

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If mGPUs is on same IOMMU group, or is ram direct mapped, then mGPUs
can share the original BO for GTT mapping dma address, without creating
new BO from export/import dmabuf.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Philip Yang
2023-08-21 15:09:56 -04:00
committed by Alex Deucher
parent 2c0f880abc
commit 5d44a766f7
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
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@@ -866,9 +866,10 @@ static int kfd_mem_attach(struct amdgpu_device *adev, struct kgd_mem *mem,
if ((adev == bo_adev && !(mem->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP)) ||
(amdgpu_ttm_tt_get_usermm(mem->bo->tbo.ttm) && reuse_dmamap(adev, bo_adev)) ||
same_hive) {
(mem->domain == AMDGPU_GEM_DOMAIN_GTT && reuse_dmamap(adev, bo_adev)) ||
same_hive) {
/* Mappings on the local GPU, or VRAM mappings in the
* local hive, or userptr mapping can reuse dma map
* local hive, or userptr, or GTT mapping can reuse dma map
* address space share the original BO
*/
attachment[i]->type = KFD_MEM_ATT_SHARED;