drm/i915: Move submission tasklet to i915_sched_engine

The submission tasklet operates on i915_sched_engine, thus it is the
correct place for it.

v3:
 (Jason Ekstrand)
  Change sched_engine->engine to a void* private data pointer
  Add kernel doc
v4:
 (Daniele)
  Update private_data comment
  Set queue_priority_hint in kick_execlists
v5:
 (CI)
  Rebase and fix build error

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210618010638.98941-9-matthew.brost@intel.com

1 files changed, 45 insertions, 39 deletions

diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index ffad4d98cec0..cdb2126a159a 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -570,7 +570,7 @@ static void kick_siblings(struct i915_request *rq, struct intel_context *ce)
 		resubmit_virtual_request(rq, ve);
 
 	if (READ_ONCE(ve->request))
-		tasklet_hi_schedule(&ve->base.execlists.tasklet);
+		tasklet_hi_schedule(&ve->base.sched_engine->tasklet);
 }
 
 static void __execlists_schedule_out(struct i915_request * const rq,
@@ -739,9 +739,9 @@ trace_ports(const struct intel_engine_execlists *execlists,
 }
 
 static bool
-reset_in_progress(const struct intel_engine_execlists *execlists)
+reset_in_progress(const struct intel_engine_cs *engine)
 {
-	return unlikely(!__tasklet_is_enabled(&execlists->tasklet));
+	return unlikely(!__tasklet_is_enabled(&engine->sched_engine->tasklet));
 }
 
 static __maybe_unused noinline bool
@@ -757,7 +757,7 @@ assert_pending_valid(const struct intel_engine_execlists *execlists,
 	trace_ports(execlists, msg, execlists->pending);
 
 	/* We may be messing around with the lists during reset, lalala */
-	if (reset_in_progress(execlists))
+	if (reset_in_progress(engine))
 		return true;
 
 	if (!execlists->pending[0]) {
@@ -1190,7 +1190,7 @@ static void start_timeslice(struct intel_engine_cs *engine)
 			 * its timeslice, so recheck.
 			 */
 			if (!timer_pending(&el->timer))
-				tasklet_hi_schedule(&el->tasklet);
+				tasklet_hi_schedule(&engine->sched_engine->tasklet);
 			return;
 		}
 
@@ -1772,8 +1772,8 @@ process_csb(struct intel_engine_cs *engine, struct i915_request **inactive)
 	 * access. Either we are inside the tasklet, or the tasklet is disabled
 	 * and we assume that is only inside the reset paths and so serialised.
 	 */
-	GEM_BUG_ON(!tasklet_is_locked(&execlists->tasklet) &&
-		   !reset_in_progress(execlists));
+	GEM_BUG_ON(!tasklet_is_locked(&engine->sched_engine->tasklet) &&
+		   !reset_in_progress(engine));
 
 	/*
 	 * Note that csb_write, csb_status may be either in HWSP or mmio.
@@ -2131,7 +2131,7 @@ static void execlists_unhold(struct intel_engine_cs *engine,
 
 	if (rq_prio(rq) > engine->sched_engine->queue_priority_hint) {
 		engine->sched_engine->queue_priority_hint = rq_prio(rq);
-		tasklet_hi_schedule(&engine->execlists.tasklet);
+		tasklet_hi_schedule(&engine->sched_engine->tasklet);
 	}
 
 	spin_unlock_irq(&engine->sched_engine->lock);
@@ -2322,13 +2322,13 @@ static void execlists_reset(struct intel_engine_cs *engine, const char *msg)
 	ENGINE_TRACE(engine, "reset for %s\n", msg);
 
 	/* Mark this tasklet as disabled to avoid waiting for it to complete */
-	tasklet_disable_nosync(&engine->execlists.tasklet);
+	tasklet_disable_nosync(&engine->sched_engine->tasklet);
 
 	ring_set_paused(engine, 1); /* Freeze the current request in place */
 	execlists_capture(engine);
 	intel_engine_reset(engine, msg);
 
-	tasklet_enable(&engine->execlists.tasklet);
+	tasklet_enable(&engine->sched_engine->tasklet);
 	clear_and_wake_up_bit(bit, lock);
 }
 
@@ -2351,8 +2351,9 @@ static bool preempt_timeout(const struct intel_engine_cs *const engine)
  */
 static void execlists_submission_tasklet(struct tasklet_struct *t)
 {
-	struct intel_engine_cs * const engine =
-		from_tasklet(engine, t, execlists.tasklet);
+	struct i915_sched_engine *sched_engine =
+		from_tasklet(sched_engine, t, tasklet);
+	struct intel_engine_cs * const engine = sched_engine->private_data;
 	struct i915_request *post[2 * EXECLIST_MAX_PORTS];
 	struct i915_request **inactive;
 
@@ -2427,13 +2428,16 @@ static void execlists_irq_handler(struct intel_engine_cs *engine, u16 iir)
 		intel_engine_signal_breadcrumbs(engine);
 
 	if (tasklet)
-		tasklet_hi_schedule(&engine->execlists.tasklet);
+		tasklet_hi_schedule(&engine->sched_engine->tasklet);
 }
 
 static void __execlists_kick(struct intel_engine_execlists *execlists)
 {
+	struct intel_engine_cs *engine =
+		container_of(execlists, typeof(*engine), execlists);
+
 	/* Kick the tasklet for some interrupt coalescing and reset handling */
-	tasklet_hi_schedule(&execlists->tasklet);
+	tasklet_hi_schedule(&engine->sched_engine->tasklet);
 }
 
 #define execlists_kick(t, member) \
@@ -2808,10 +2812,8 @@ static int execlists_resume(struct intel_engine_cs *engine)
 
 static void execlists_reset_prepare(struct intel_engine_cs *engine)
 {
-	struct intel_engine_execlists * const execlists = &engine->execlists;
-
 	ENGINE_TRACE(engine, "depth<-%d\n",
-		     atomic_read(&execlists->tasklet.count));
+		     atomic_read(&engine->sched_engine->tasklet.count));
 
 	/*
 	 * Prevent request submission to the hardware until we have
@@ -2822,8 +2824,8 @@ static void execlists_reset_prepare(struct intel_engine_cs *engine)
 	 * Turning off the execlists->tasklet until the reset is over
 	 * prevents the race.
 	 */
-	__tasklet_disable_sync_once(&execlists->tasklet);
-	GEM_BUG_ON(!reset_in_progress(execlists));
+	__tasklet_disable_sync_once(&engine->sched_engine->tasklet);
+	GEM_BUG_ON(!reset_in_progress(engine));
 
 	/*
 	 * We stop engines, otherwise we might get failed reset and a
@@ -2973,8 +2975,9 @@ static void execlists_reset_rewind(struct intel_engine_cs *engine, bool stalled)
 
 static void nop_submission_tasklet(struct tasklet_struct *t)
 {
-	struct intel_engine_cs * const engine =
-		from_tasklet(engine, t, execlists.tasklet);
+	struct i915_sched_engine *sched_engine =
+		from_tasklet(sched_engine, t, tasklet);
+	struct intel_engine_cs * const engine = sched_engine->private_data;
 
 	/* The driver is wedged; don't process any more events. */
 	WRITE_ONCE(engine->sched_engine->queue_priority_hint, INT_MIN);
@@ -3061,8 +3064,8 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
 	sched_engine->queue_priority_hint = INT_MIN;
 	sched_engine->queue = RB_ROOT_CACHED;
 
-	GEM_BUG_ON(__tasklet_is_enabled(&execlists->tasklet));
-	execlists->tasklet.callback = nop_submission_tasklet;
+	GEM_BUG_ON(__tasklet_is_enabled(&engine->sched_engine->tasklet));
+	engine->sched_engine->tasklet.callback = nop_submission_tasklet;
 
 	spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
 	rcu_read_unlock();
@@ -3082,14 +3085,14 @@ static void execlists_reset_finish(struct intel_engine_cs *engine)
 	 * reset as the next level of recovery, and as a final resort we
 	 * will declare the device wedged.
 	 */
-	GEM_BUG_ON(!reset_in_progress(execlists));
+	GEM_BUG_ON(!reset_in_progress(engine));
 
 	/* And kick in case we missed a new request submission. */
-	if (__tasklet_enable(&execlists->tasklet))
+	if (__tasklet_enable(&engine->sched_engine->tasklet))
 		__execlists_kick(execlists);
 
 	ENGINE_TRACE(engine, "depth->%d\n",
-		     atomic_read(&execlists->tasklet.count));
+		     atomic_read(&engine->sched_engine->tasklet.count));
 }
 
 static void gen8_logical_ring_enable_irq(struct intel_engine_cs *engine)
@@ -3163,7 +3166,7 @@ static void kick_execlists(const struct i915_request *rq, int prio)
 	 * so kiss.
 	 */
 	if (prio >= max(I915_PRIORITY_NORMAL, rq_prio(inflight)))
-		tasklet_hi_schedule(&engine->execlists.tasklet);
+		tasklet_hi_schedule(&sched_engine->tasklet);
 
 unlock:
 	rcu_read_unlock();
@@ -3174,7 +3177,7 @@ static void execlists_set_default_submission(struct intel_engine_cs *engine)
 	engine->submit_request = execlists_submit_request;
 	engine->sched_engine->schedule = i915_schedule;
 	engine->sched_engine->kick_backend = kick_execlists;
-	engine->execlists.tasklet.callback = execlists_submission_tasklet;
+	engine->sched_engine->tasklet.callback = execlists_submission_tasklet;
 }
 
 static void execlists_shutdown(struct intel_engine_cs *engine)
@@ -3182,7 +3185,7 @@ static void execlists_shutdown(struct intel_engine_cs *engine)
 	/* Synchronise with residual timers and any softirq they raise */
 	del_timer_sync(&engine->execlists.timer);
 	del_timer_sync(&engine->execlists.preempt);
-	tasklet_kill(&engine->execlists.tasklet);
+	tasklet_kill(&engine->sched_engine->tasklet);
 }
 
 static void execlists_release(struct intel_engine_cs *engine)
@@ -3298,7 +3301,7 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine)
 	struct intel_uncore *uncore = engine->uncore;
 	u32 base = engine->mmio_base;
 
-	tasklet_setup(&engine->execlists.tasklet, execlists_submission_tasklet);
+	tasklet_setup(&engine->sched_engine->tasklet, execlists_submission_tasklet);
 	timer_setup(&engine->execlists.timer, execlists_timeslice, 0);
 	timer_setup(&engine->execlists.preempt, execlists_preempt, 0);
 
@@ -3380,7 +3383,7 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
 	 * rbtrees as in the case it is running in parallel, it may reinsert
 	 * the rb_node into a sibling.
 	 */
-	tasklet_kill(&ve->base.execlists.tasklet);
+	tasklet_kill(&ve->base.sched_engine->tasklet);
 
 	/* Decouple ourselves from the siblings, no more access allowed. */
 	for (n = 0; n < ve->num_siblings; n++) {
@@ -3392,13 +3395,13 @@ static void rcu_virtual_context_destroy(struct work_struct *wrk)
 
 		spin_lock_irq(&sibling->sched_engine->lock);
 
-		/* Detachment is lazily performed in the execlists tasklet */
+		/* Detachment is lazily performed in the sched_engine->tasklet */
 		if (!RB_EMPTY_NODE(node))
 			rb_erase_cached(node, &sibling->execlists.virtual);
 
 		spin_unlock_irq(&sibling->sched_engine->lock);
 	}
-	GEM_BUG_ON(__tasklet_is_scheduled(&ve->base.execlists.tasklet));
+	GEM_BUG_ON(__tasklet_is_scheduled(&ve->base.sched_engine->tasklet));
 	GEM_BUG_ON(!list_empty(virtual_queue(ve)));
 
 	lrc_fini(&ve->context);
@@ -3545,9 +3548,11 @@ static intel_engine_mask_t virtual_submission_mask(struct virtual_engine *ve)
 
 static void virtual_submission_tasklet(struct tasklet_struct *t)
 {
+	struct i915_sched_engine *sched_engine =
+		from_tasklet(sched_engine, t, tasklet);
 	struct virtual_engine * const ve =
-		from_tasklet(ve, t, base.execlists.tasklet);
-	const int prio = READ_ONCE(ve->base.sched_engine->queue_priority_hint);
+		(struct virtual_engine *)sched_engine->private_data;
+	const int prio = READ_ONCE(sched_engine->queue_priority_hint);
 	intel_engine_mask_t mask;
 	unsigned int n;
 
@@ -3616,7 +3621,7 @@ submit_engine:
 		GEM_BUG_ON(RB_EMPTY_NODE(&node->rb));
 		node->prio = prio;
 		if (first && prio > sibling->sched_engine->queue_priority_hint)
-			tasklet_hi_schedule(&sibling->execlists.tasklet);
+			tasklet_hi_schedule(&sibling->sched_engine->tasklet);
 
 unlock_engine:
 		spin_unlock_irq(&sibling->sched_engine->lock);
@@ -3657,7 +3662,7 @@ static void virtual_submit_request(struct i915_request *rq)
 	GEM_BUG_ON(!list_empty(virtual_queue(ve)));
 	list_move_tail(&rq->sched.link, virtual_queue(ve));
 
-	tasklet_hi_schedule(&ve->base.execlists.tasklet);
+	tasklet_hi_schedule(&ve->base.sched_engine->tasklet);
 
 unlock:
 	spin_unlock_irqrestore(&ve->base.sched_engine->lock, flags);
@@ -3751,6 +3756,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
 		err = -ENOMEM;
 		goto err_put;
 	}
+	ve->base.sched_engine->private_data = &ve->base;
 
 	ve->base.cops = &virtual_context_ops;
 	ve->base.request_alloc = execlists_request_alloc;
@@ -3761,7 +3767,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
 	ve->base.bond_execute = virtual_bond_execute;
 
 	INIT_LIST_HEAD(virtual_queue(ve));
-	tasklet_setup(&ve->base.execlists.tasklet, virtual_submission_tasklet);
+	tasklet_setup(&ve->base.sched_engine->tasklet, virtual_submission_tasklet);
 
 	intel_context_init(&ve->context, &ve->base);
 
@@ -3789,7 +3795,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
 		 * layering if we handle cloning of the requests and
 		 * submitting a copy into each backend.
 		 */
-		if (sibling->execlists.tasklet.callback !=
+		if (sibling->sched_engine->tasklet.callback !=
 		    execlists_submission_tasklet) {
 			err = -ENODEV;
 			goto err_put;