From 5d44a766f70d394871da8882e4426f61e86c2d5b Mon Sep 17 00:00:00 2001 From: Philip Yang Date: Mon, 21 Aug 2023 15:09:56 -0400 Subject: [PATCH] drm/amdkfd: Share the original BO for GTT mapping 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 Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- 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 7d6daf8d2bfaf..57189b8bc2148 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -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; -- 2.30.2