44  * The reservation object provides a mechanism to manage shared and
47  * write operations) or N shared fences (read operations).  The RCU
66 	list = kmalloc(offsetof(typeof(*list), shared[shared_max]), GFP_KERNEL);  in dma_resv_list_alloc()
70 	list->shared_max = (ksize(list) - offsetof(typeof(*list), shared)) /  in dma_resv_list_alloc()
71 		sizeof(*list->shared);  in dma_resv_list_alloc()
90 		dma_fence_put(rcu_dereference_protected(list->shared[i], true));  in dma_resv_list_free()
176  * dma_resv_reserve_shared - Reserve space to add shared fences to
219 		fence = rcu_dereference_protected(old->shared[i],  in dma_resv_reserve_shared()
222 			RCU_INIT_POINTER(new->shared[--k], fence);  in dma_resv_reserve_shared()
224 			RCU_INIT_POINTER(new->shared[j++], fence);  in dma_resv_reserve_shared()
232 	 * active (unsignaled) shared fences. Individual fences and the  in dma_resv_reserve_shared()
245 		fence = rcu_dereference_protected(new->shared[i],  in dma_resv_reserve_shared()
256  * dma_resv_add_shared_fence - Add a fence to a shared slot
258  * @fence: the shared fence to add
260  * Add a fence to a shared slot, obj->lock must be held, and
280 		old = rcu_dereference_protected(fobj->shared[i],  in dma_resv_add_shared_fence()
292 	RCU_INIT_POINTER(fobj->shared[i], fence);  in dma_resv_add_shared_fence()
304  * @fence: the shared fence to add
330 	/* inplace update, no shared fences */  in dma_resv_add_excl_fence()
332 		dma_fence_put(rcu_dereference_protected(old->shared[i],  in dma_resv_add_excl_fence()
378 			fence = rcu_dereference(src_list->shared[i]);  in dma_resv_copy_fences()
394 			rcu_assign_pointer(dst_list->shared[dst_list->shared_count++], fence);  in dma_resv_copy_fences()
420  * dma_resv_get_fences_rcu - Get an object's shared and exclusive
424  * @pshared_count: the number of shared fences returned
425  * @pshared: the array of shared fence ptrs returned (array is krealloc'd to
430  * shared fences as well. Returns either zero or -ENOMEM.
437 	struct dma_fence **shared = NULL;  in dma_resv_get_fences_rcu()  local
458 			sz += sizeof(*shared) * fobj->shared_max;  in dma_resv_get_fences_rcu()
461 			sz += sizeof(*shared);  in dma_resv_get_fences_rcu()
466 			nshared = krealloc(shared, sz,  in dma_resv_get_fences_rcu()
474 				nshared = krealloc(shared, sz, GFP_KERNEL);  in dma_resv_get_fences_rcu()
476 					shared = nshared;  in dma_resv_get_fences_rcu()
483 			shared = nshared;  in dma_resv_get_fences_rcu()
486 				shared[i] = rcu_dereference(fobj->shared[i]);  in dma_resv_get_fences_rcu()
487 				if (!dma_fence_get_rcu(shared[i]))  in dma_resv_get_fences_rcu()
494 				dma_fence_put(shared[i]);  in dma_resv_get_fences_rcu()
507 		shared[shared_count++] = fence_excl;  in dma_resv_get_fences_rcu()
510 		kfree(shared);  in dma_resv_get_fences_rcu()
511 		shared = NULL;  in dma_resv_get_fences_rcu()
515 	*pshared = shared;  in dma_resv_get_fences_rcu()
522  * shared and/or exclusive fences.
568 			struct dma_fence *lfence = rcu_dereference(fobj->shared[i]);  in dma_resv_wait_timeout_rcu()
654 			struct dma_fence *fence = rcu_dereference(fobj->shared[i]);  in dma_resv_test_signaled_rcu()