Lines Matching refs:chain
3 * fence-chain: chain fences together in a timeline
10 #include <linux/dma-fence-chain.h>
16 * @chain: chain node to get the previous node from
19 * chain node.
21 static struct dma_fence *dma_fence_chain_get_prev(struct dma_fence_chain *chain)
26 prev = dma_fence_get_rcu_safe(&chain->prev);
32 * dma_fence_chain_walk - chain walking function
33 * @fence: current chain node
35 * Walk the chain to the next node. Returns the next fence or NULL if we are at
36 * the end of the chain. Garbage collects chain nodes which are already
41 struct dma_fence_chain *chain, *prev_chain;
44 chain = to_dma_fence_chain(fence);
45 if (!chain) {
50 while ((prev = dma_fence_chain_get_prev(chain))) {
65 tmp = cmpxchg((struct dma_fence __force **)&chain->prev,
80 * dma_fence_chain_find_seqno - find fence chain node by seqno
81 * @pfence: pointer to the chain node where to start
84 * Advance the fence pointer to the chain node which will signal this sequence
87 * Returns EINVAL if the fence is not a chain node or the sequence number has
92 struct dma_fence_chain *chain;
97 chain = to_dma_fence_chain(*pfence);
98 if (!chain || chain->base.seqno < seqno)
101 dma_fence_chain_for_each(*pfence, &chain->base) {
102 if ((*pfence)->context != chain->base.context ||
106 dma_fence_put(&chain->base);
124 struct dma_fence_chain *chain;
126 chain = container_of(work, typeof(*chain), work);
129 if (!dma_fence_chain_enable_signaling(&chain->base))
131 dma_fence_signal(&chain->base);
132 dma_fence_put(&chain->base);
137 struct dma_fence_chain *chain;
139 chain = container_of(cb, typeof(*chain), cb);
140 irq_work_queue(&chain->work);
150 struct dma_fence_chain *chain = to_dma_fence_chain(fence);
151 struct dma_fence *f = chain ? chain->fence : fence;
167 struct dma_fence_chain *chain = to_dma_fence_chain(fence);
168 struct dma_fence *f = chain ? chain->fence : fence;
181 struct dma_fence_chain *chain = to_dma_fence_chain(fence);
184 /* Manually unlink the chain as much as possible to avoid recursion
187 while ((prev = rcu_dereference_protected(chain->prev, true))) {
200 chain->prev = prev_chain->prev;
206 dma_fence_put(chain->fence);
221 * dma_fence_chain_init - initialize a fence chain
222 * @chain: the chain node to initialize
225 * @seqno: the sequence number to use for the fence chain
227 * Initialize a new chain node and either start a new chain or add the node to
228 * the existing chain of the previous fence.
230 void dma_fence_chain_init(struct dma_fence_chain *chain,
238 spin_lock_init(&chain->lock);
239 rcu_assign_pointer(chain->prev, prev);
240 chain->fence = fence;
241 chain->prev_seqno = 0;
242 init_irq_work(&chain->work, dma_fence_chain_irq_work);
244 /* Try to reuse the context of the previous chain node. */
247 chain->prev_seqno = prev->seqno;
255 dma_fence_init(&chain->base, &dma_fence_chain_ops,
256 &chain->lock, context, seqno);