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drm/ttm: return -EBUSY on pipelining with no_gpu_wait (v2)

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Setting the no_gpu_wait flag means that the allocate BO must be available
immediately and we can't wait for any GPU operation to finish.

v2: squash in mem leak fix, rebase

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2019-09-16 10:20:47 -05:00 committed by Alex Deucher
parent 6817bf283b
commit 3084cf46cf
1 changed files with 26 additions and 18 deletions
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44
drivers/gpu/drm/ttm/ttm_bo.c
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@ -925,7 +925,8 @@ EXPORT_SYMBOL(ttm_bo_mem_put);
*/
static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
struct ttm_mem_type_manager *man,
struct ttm_mem_reg *mem)
struct ttm_mem_reg *mem,
bool no_wait_gpu)
{
struct dma_fence *fence;
int ret;
@ -934,19 +935,22 @@ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
fence = dma_fence_get(man->move);
spin_unlock(&man->move_lock);
if (fence) {
dma_resv_add_shared_fence(bo->base.resv, fence);
if (!fence)
return 0;
ret = dma_resv_reserve_shared(bo->base.resv, 1);
if (unlikely(ret)) {
dma_fence_put(fence);
return ret;
}
if (no_wait_gpu)
return -EBUSY;
dma_fence_put(bo->moving);
bo->moving = fence;
dma_resv_add_shared_fence(bo->base.resv, fence);
ret = dma_resv_reserve_shared(bo->base.resv, 1);
if (unlikely(ret)) {
dma_fence_put(fence);
return ret;
}
dma_fence_put(bo->moving);
bo->moving = fence;
return 0;
}
@ -977,7 +981,7 @@ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
return ret;
} while (1);
return ttm_bo_add_move_fence(bo, man, mem);
return ttm_bo_add_move_fence(bo, man, mem, ctx->no_wait_gpu);
}
static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man,
@ -1119,14 +1123,18 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
if (unlikely(ret))
goto error;
if (mem->mm_node) {
ret = ttm_bo_add_move_fence(bo, man, mem);
if (unlikely(ret)) {
(*man->func->put_node)(man, mem);
goto error;
}
return 0;
if (!mem->mm_node)
continue;
ret = ttm_bo_add_move_fence(bo, man, mem, ctx->no_wait_gpu);
if (unlikely(ret)) {
(*man->func->put_node)(man, mem);
if (ret == -EBUSY)
continue;
goto error;
}
return 0;
}
for (i = 0; i < placement->num_busy_placement; ++i) {