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drm/amdgpu: Add amdgpu_sync_wait

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v2: Add intr option

Helper function useful for CPU update of VM page tables. Also useful if
kernel have to synchronously wait till VM page tables are updated.

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harish Kasiviswanathan 2017-05-15 15:09:15 -04:00 committed by Alex Deucher
parent 9a4b7d4c76
commit a6583af4ae
2 changed files with 20 additions and 0 deletions
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19
drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
View File

@ -298,6 +298,25 @@ struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync)
return NULL;
}
int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr)
{
struct amdgpu_sync_entry *e;
struct hlist_node *tmp;
int i, r;
hash_for_each_safe(sync->fences, i, tmp, e, node) {
r = dma_fence_wait(e->fence, intr);
if (r)
return r;
hash_del(&e->node);
dma_fence_put(e->fence);
kmem_cache_free(amdgpu_sync_slab, e);
}
return 0;
}
/**
* amdgpu_sync_free - free the sync object
*

1
drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h
View File

@ -49,6 +49,7 @@ int amdgpu_sync_resv(struct amdgpu_device *adev,
struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,
struct amdgpu_ring *ring);
struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync);
int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr);
void amdgpu_sync_free(struct amdgpu_sync *sync);
int amdgpu_sync_init(void);
void amdgpu_sync_fini(void);