6 #include <linux/dma-fence.h>
18  * the migration fence with the unbind fences if these are coalesced
33 /* Min number of fence pointers in the array when an allocation occurs. */
61  * This function drops all fence references taken, conditionally frees and
75 static int i915_deps_grow(struct i915_deps *deps, struct dma_fence *fence,  in i915_deps_grow()  argument
96 	deps->fences[deps->num_deps++] = dma_fence_get(fence);  in i915_deps_grow()
100 	if (ctx->no_wait_gpu && !dma_fence_is_signaled(fence)) {  in i915_deps_grow()
105 	ret = dma_fence_wait(fence, ctx->interruptible);  in i915_deps_grow()
109 	ret = fence->error;  in i915_deps_grow()
127  * encounters an error during the wait or a fence error, the wait for
155  * i915_deps_add_dependency - Add a fence to the dependency collection
156  * @deps: Pointer to the i915_deps structure a fence is to be added to.
157  * @fence: The fence to add.
161  * Adds a fence to the dependency collection, and takes a reference on it.
162  * If the fence context is not zero and there was a later fence from the
163  * same fence context already added, then the fence is not added to the
164  * dependency collection. If the fence context is not zero and there was
165  * an earlier fence already added, then the fence will replace the older
166  * fence from the same context and the reference on the earlier fence will
168  * If there is a failure to allocate memory to accommodate the new fence to
169  * be added, the new fence will instead be waited for and an error may
170  * be returned; depending on the value of @ctx, or if there was a fence
172  * finalized and all fence reference dropped.
177 			     struct dma_fence *fence,  in i915_deps_add_dependency()  argument
183 	if (!fence)  in i915_deps_add_dependency()
186 	if (dma_fence_is_signaled(fence)) {  in i915_deps_add_dependency()
187 		ret = fence->error;  in i915_deps_add_dependency()
196 		if (!entry->context || entry->context != fence->context)  in i915_deps_add_dependency()
199 		if (dma_fence_is_later(fence, entry)) {  in i915_deps_add_dependency()
201 			deps->fences[i] = dma_fence_get(fence);  in i915_deps_add_dependency()
207 	return i915_deps_grow(deps, fence, ctx);  in i915_deps_add_dependency()
213  * @deps: Pointer to the i915_deps structure a fence is to be added to.
226 	struct dma_fence *fence;  in i915_deps_add_resv()  local
229 	dma_resv_for_each_fence(&iter, resv, dma_resv_usage_rw(true), fence) {  in i915_deps_add_resv()
230 		int ret = i915_deps_add_dependency(deps, fence, ctx);  in i915_deps_add_resv()