diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_scheduler.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_scheduler.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c index bf87c70bfdd9..34b654b4e58a 100644 --- a/drivers/gpu/drm/i915/i915_scheduler.c +++ b/drivers/gpu/drm/i915/i915_scheduler.c @@ -326,20 +326,18 @@ static void __i915_schedule(struct i915_sched_node *node, node->attr.priority = prio; - if (list_empty(&node->link)) { - /* - * If the request is not in the priolist queue because - * it is not yet runnable, then it doesn't contribute - * to our preemption decisions. On the other hand, - * if the request is on the HW, it too is not in the - * queue; but in that case we may still need to reorder - * the inflight requests. - */ + /* + * Once the request is ready, it will be placed into the + * priority lists and then onto the HW runlist. Before the + * request is ready, it does not contribute to our preemption + * decisions and we can safely ignore it, as it will, and + * any preemption required, be dealt with upon submission. + * See engine->submit_request() + */ + if (list_empty(&node->link)) continue; - } - if (!intel_engine_is_virtual(engine) && - !i915_request_is_active(node_to_request(node))) { + if (i915_request_in_priority_queue(node_to_request(node))) { if (!cache.priolist) cache.priolist = i915_sched_lookup_priolist(engine, @@ -425,8 +423,6 @@ bool __i915_sched_node_add_dependency(struct i915_sched_node *node, if (!node_signaled(signal)) { INIT_LIST_HEAD(&dep->dfs_link); - list_add(&dep->wait_link, &signal->waiters_list); - list_add(&dep->signal_link, &node->signalers_list); dep->signaler = signal; dep->waiter = node; dep->flags = flags; @@ -436,6 +432,10 @@ bool __i915_sched_node_add_dependency(struct i915_sched_node *node, !node_started(signal)) node->flags |= I915_SCHED_HAS_SEMAPHORE_CHAIN; + /* All set, now publish. Beware the lockless walkers. */ + list_add(&dep->signal_link, &node->signalers_list); + list_add_rcu(&dep->wait_link, &signal->waiters_list); + /* * As we do not allow WAIT to preempt inflight requests, * once we have executed a request, along with triggering |