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Commit 663f71e7 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Remove engine->execlist_lock 



The execlist_lock is now completely subsumed by the engine->timeline->lock,
and so we can remove the redundant layer of locking.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161114204105.29171-5-chris@chris-wilson.co.uk
parent d55ac5bf

drivers/gpu/drm/i915/i915_debugfs.c

+2 −2
Original line number Diff line number Diff line
@@ -3256,11 +3256,11 @@ static int i915_engine_info(struct seq_file *m, void *unused) 
				seq_printf(m, "\t\tELSP[1] idle\n");

			rcu_read_unlock();



			spin_lock_irq(&engine->execlist_lock);

			spin_lock_irq(&engine->timeline->lock);

			list_for_each_entry(rq, &engine->execlist_queue, execlist_link) {

				print_request(m, rq, "\t\tQ ");

			}

			spin_unlock_irq(&engine->execlist_lock);

			spin_unlock_irq(&engine->timeline->lock);

		} else if (INTEL_GEN(dev_priv) > 6) {

			seq_printf(m, "\tPP_DIR_BASE: 0x%08x\n",

				   I915_READ(RING_PP_DIR_BASE(engine)));

drivers/gpu/drm/i915/i915_gem.c

+6 −2
Original line number Diff line number Diff line
@@ -2717,12 +2717,16 @@ static void i915_gem_cleanup_engine(struct intel_engine_cs *engine) 
	 */



	if (i915.enable_execlists) {

		spin_lock(&engine->execlist_lock);

		unsigned long flags;



		spin_lock_irqsave(&engine->timeline->lock, flags);



		INIT_LIST_HEAD(&engine->execlist_queue);

		i915_gem_request_put(engine->execlist_port[0].request);

		i915_gem_request_put(engine->execlist_port[1].request);

		memset(engine->execlist_port, 0, sizeof(engine->execlist_port));

		spin_unlock(&engine->execlist_lock);



		spin_unlock_irqrestore(&engine->timeline->lock, flags);

	}

}

drivers/gpu/drm/i915/intel_engine_cs.c

+0 −1
Original line number Diff line number Diff line
@@ -237,7 +237,6 @@ static void intel_engine_init_timeline(struct intel_engine_cs *engine) 
void intel_engine_setup_common(struct intel_engine_cs *engine)

{

	INIT_LIST_HEAD(&engine->execlist_queue);

	spin_lock_init(&engine->execlist_lock);



	intel_engine_init_timeline(engine);

	intel_engine_init_hangcheck(engine);

drivers/gpu/drm/i915/intel_lrc.c

+3 −4
Original line number Diff line number Diff line
@@ -471,7 +471,6 @@ static void execlists_dequeue(struct intel_engine_cs *engine) 
	 */



	spin_lock_irqsave(&engine->timeline->lock, flags);

	spin_lock(&engine->execlist_lock);

	list_for_each_entry(cursor, &engine->execlist_queue, execlist_link) {

		/* Can we combine this request with the current port? It has to

		 * be the same context/ringbuffer and not have any exceptions
@@ -524,7 +523,6 @@ static void execlists_dequeue(struct intel_engine_cs *engine) 


		i915_gem_request_assign(&port->request, last);

	}

	spin_unlock(&engine->execlist_lock);

	spin_unlock_irqrestore(&engine->timeline->lock, flags);



	if (submit)
@@ -633,13 +631,14 @@ static void execlists_submit_request(struct drm_i915_gem_request *request) 
	struct intel_engine_cs *engine = request->engine;

	unsigned long flags;



	spin_lock_irqsave(&engine->execlist_lock, flags);

	/* Will be called from irq-context when using foreign fences. */

	spin_lock_irqsave(&engine->timeline->lock, flags);



	list_add_tail(&request->execlist_link, &engine->execlist_queue);

	if (execlists_elsp_idle(engine))

		tasklet_hi_schedule(&engine->irq_tasklet);



	spin_unlock_irqrestore(&engine->execlist_lock, flags);

	spin_unlock_irqrestore(&engine->timeline->lock, flags);

}



int intel_logical_ring_alloc_request_extras(struct drm_i915_gem_request *request)

drivers/gpu/drm/i915/intel_ringbuffer.h

+0 −1
Original line number Diff line number Diff line
@@ -335,7 +335,6 @@ struct intel_engine_cs { 


	/* Execlists */

	struct tasklet_struct irq_tasklet;

	spinlock_t execlist_lock; /* used inside tasklet, use spin_lock_bh */

	struct execlist_port {

		struct drm_i915_gem_request *request;

		unsigned int count;