diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 7a7c4a2bd778..8893e795f672 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1154,21 +1154,23 @@ static void ironlake_rps_change_irq_handler(struct drm_i915_private *dev_priv) static void notify_ring(struct intel_engine_cs *engine) { + const u32 seqno = intel_engine_get_seqno(engine); struct i915_request *rq = NULL; + struct task_struct *tsk = NULL; struct intel_wait *wait; - if (!engine->breadcrumbs.irq_armed) + if (unlikely(!engine->breadcrumbs.irq_armed)) return; atomic_inc(&engine->irq_count); - set_bit(ENGINE_IRQ_BREADCRUMB, &engine->irq_posted); + + rcu_read_lock(); spin_lock(&engine->breadcrumbs.irq_lock); wait = engine->breadcrumbs.irq_wait; if (wait) { - bool wakeup = engine->irq_seqno_barrier; - - /* We use a callback from the dma-fence to submit + /* + * We use a callback from the dma-fence to submit * requests after waiting on our own requests. To * ensure minimum delay in queuing the next request to * hardware, signal the fence now rather than wait for @@ -1179,19 +1181,22 @@ static void notify_ring(struct intel_engine_cs *engine) * and to handle coalescing of multiple seqno updates * and many waiters. */ - if (i915_seqno_passed(intel_engine_get_seqno(engine), - wait->seqno)) { + if (i915_seqno_passed(seqno, wait->seqno)) { struct i915_request *waiter = wait->request; - wakeup = true; if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &waiter->fence.flags) && intel_wait_check_request(wait, waiter)) rq = i915_request_get(waiter); - } - if (wakeup) - wake_up_process(wait->tsk); + tsk = wait->tsk; + } else { + if (engine->irq_seqno_barrier) { + set_bit(ENGINE_IRQ_BREADCRUMB, + &engine->irq_posted); + tsk = wait->tsk; + } + } } else { if (engine->breadcrumbs.irq_armed) __intel_engine_disarm_breadcrumbs(engine); @@ -1204,6 +1209,11 @@ static void notify_ring(struct intel_engine_cs *engine) i915_request_put(rq); } + if (tsk && tsk->state & TASK_NORMAL) + wake_up_process(tsk); + + rcu_read_unlock(); + trace_intel_engine_notify(engine, wait); } |