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drm/amdgpu: fix and cleanup amdgpu_gem_object_close v4

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[ Upstream commit 82c416b13cb7d22b96ec0888b296a48dff8a09eb ]

The problem is that we can't add the clear fence to the BO
when there is an exclusive fence on it since we can't
guarantee the the clear fence will complete after the
exclusive one.

To fix this refactor the function and also add the exclusive
fence as shared to the resv object.

v2: fix warning
v3: add excl fence as shared instead
v4: squash in fix for fence handling in amdgpu_gem_object_close

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: xinhui pan <xinhui.pan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christian König 2020-03-12 12:03:34 +01:00 committed by Greg Kroah-Hartman
parent f3ec5b536f
commit 6fc5719b85
1 changed files with 25 additions and 18 deletions
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43
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
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@ -161,16 +161,17 @@ void amdgpu_gem_object_close(struct drm_gem_object *obj,
struct amdgpu_bo_list_entry vm_pd;
struct list_head list, duplicates;
struct dma_fence *fence = NULL;
struct ttm_validate_buffer tv;
struct ww_acquire_ctx ticket;
struct amdgpu_bo_va *bo_va;
int r;
long r;
INIT_LIST_HEAD(&list);
INIT_LIST_HEAD(&duplicates);
tv.bo = &bo->tbo;
tv.num_shared = 1;
tv.num_shared = 2;
list_add(&tv.head, &list);
amdgpu_vm_get_pd_bo(vm, &list, &vm_pd);
@ -178,28 +179,34 @@ void amdgpu_gem_object_close(struct drm_gem_object *obj,
r = ttm_eu_reserve_buffers(&ticket, &list, false, &duplicates, false);
if (r) {
dev_err(adev->dev, "leaking bo va because "
"we fail to reserve bo (%d)\n", r);
"we fail to reserve bo (%ld)\n", r);
return;
}
bo_va = amdgpu_vm_bo_find(vm, bo);
if (bo_va && --bo_va->ref_count == 0) {
amdgpu_vm_bo_rmv(adev, bo_va);
if (!bo_va || --bo_va->ref_count)
goto out_unlock;
if (amdgpu_vm_ready(vm)) {
struct dma_fence *fence = NULL;
amdgpu_vm_bo_rmv(adev, bo_va);
if (!amdgpu_vm_ready(vm))
goto out_unlock;
r = amdgpu_vm_clear_freed(adev, vm, &fence);
if (unlikely(r)) {
dev_err(adev->dev, "failed to clear page "
"tables on GEM object close (%d)\n", r);
}
if (fence) {
amdgpu_bo_fence(bo, fence, true);
dma_fence_put(fence);
}
}
fence = dma_resv_get_excl(bo->tbo.base.resv);
if (fence) {
amdgpu_bo_fence(bo, fence, true);
fence = NULL;
}
r = amdgpu_vm_clear_freed(adev, vm, &fence);
if (r || !fence)
goto out_unlock;
amdgpu_bo_fence(bo, fence, true);
dma_fence_put(fence);
out_unlock:
if (unlikely(r < 0))
dev_err(adev->dev, "failed to clear page "
"tables on GEM object close (%ld)\n", r);
ttm_eu_backoff_reservation(&ticket, &list);
}