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 <[email protected]> --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index 282879c3441a..b5b940485059 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -864,9 +864,10 @@ 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; -- 2.35.1
