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drm/amdgpu: Use GEM obj reference for KFD BOs

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[ Upstream commit 39b3128d7ffd44e400e581e6f49e88cb42bef9a1 ]

Releasing the AMDGPU BO ref directly leads to problems when BOs were
exported as DMA bufs. Releasing the GEM reference makes sure that the
AMDGPU/TTM BO is not freed too early.

Also take a GEM reference when importing BOs from DMABufs to keep
references to imported BOs balances properly.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Tested-by: Alex Sierra <alex.sierra@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Sierra <alex.sierra@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Felix Kuehling 2020-05-05 14:02:43 -04:00 • committed by Greg Kroah-Hartman
commit 336292c44f
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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@ -1288,7 +1288,7 @@ int amdgpu_amdkfd_gpuvm_free_memory_of_gpu(
}
/* Free the BO*/
amdgpu_bo_unref(&mem->bo);
drm_gem_object_put_unlocked(&mem->bo->tbo.base);
mutex_destroy(&mem->lock);
kfree(mem);
@ -1630,7 +1630,8 @@ int amdgpu_amdkfd_gpuvm_import_dmabuf(struct kgd_dev *kgd,
AMDGPU_VM_PAGE_READABLE | AMDGPU_VM_PAGE_WRITEABLE |
AMDGPU_VM_PAGE_EXECUTABLE | AMDGPU_VM_MTYPE_NC;
(*mem)->bo = amdgpu_bo_ref(bo);
drm_gem_object_get(&bo->tbo.base);
(*mem)->bo = bo;
(*mem)->va = va;
(*mem)->domain = (bo->preferred_domains & AMDGPU_GEM_DOMAIN_VRAM) ?
AMDGPU_GEM_DOMAIN_VRAM : AMDGPU_GEM_DOMAIN_GTT;