drm/i915/gt: use new tasklet API for execution list

This converts the driver to use the new tasklet API introduced in
commit 12cc923f ("tasklet: Introduce new initialization API")

v2: Fix up selftests/execlists.
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20210126150155.1617-1-kernel@esmil.dkSigned-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/gt/intel_engine_cs.c

@@ -1220,14 +1220,14 @@ void __intel_engine_flush_submission(struct intel_engine_cs *engine, bool sync)
 {
 	struct tasklet_struct *t = &engine->execlists.tasklet;
 
-	if (!t->func)
+	if (!t->callback)
 		return;
 
 	local_bh_disable();
 	if (tasklet_trylock(t)) {
 		/* Must wait for any GPU reset in progress. */
 		if (__tasklet_is_enabled(t))
-			t->func(t->data);
+			t->callback(t);
 		tasklet_unlock(t);
 	}
 	local_bh_enable();

drivers/gpu/drm/i915/gt/intel_execlists_submission.c

@@ -2334,9 +2334,10 @@ static bool preempt_timeout(const struct intel_engine_cs *const engine)
  * Check the unread Context Status Buffers and manage the submission of new
  * contexts to the ELSP accordingly.
  */
-static void execlists_submission_tasklet(unsigned long data)
+static void execlists_submission_tasklet(struct tasklet_struct *t)
 {
-	struct intel_engine_cs * const engine = (struct intel_engine_cs *)data;
+	struct intel_engine_cs * const engine =
+		from_tasklet(engine, t, execlists.tasklet);
 	struct i915_request *post[2 * EXECLIST_MAX_PORTS];
 	struct i915_request **inactive;
 
@@ -2914,9 +2915,10 @@ static void execlists_reset_rewind(struct intel_engine_cs *engine, bool stalled)
 	rcu_read_unlock();
 }
 
-static void nop_submission_tasklet(unsigned long data)
+static void nop_submission_tasklet(struct tasklet_struct *t)
 {
-	struct intel_engine_cs * const engine = (struct intel_engine_cs *)data;
+	struct intel_engine_cs * const engine =
+		from_tasklet(engine, t, execlists.tasklet);
 
 	/* The driver is wedged; don't process any more events. */
 	WRITE_ONCE(engine->execlists.queue_priority_hint, INT_MIN);
@@ -3000,7 +3002,7 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine)
 	execlists->queue = RB_ROOT_CACHED;
 
 	GEM_BUG_ON(__tasklet_is_enabled(&execlists->tasklet));
-	execlists->tasklet.func = nop_submission_tasklet;
+	execlists->tasklet.callback = nop_submission_tasklet;
 
 	spin_unlock_irqrestore(&engine->active.lock, flags);
 	rcu_read_unlock();
@@ -3061,7 +3063,7 @@ static void execlists_set_default_submission(struct intel_engine_cs *engine)
 {
 	engine->submit_request = execlists_submit_request;
 	engine->schedule = i915_schedule;
-	engine->execlists.tasklet.func = execlists_submission_tasklet;
+	engine->execlists.tasklet.callback = execlists_submission_tasklet;
 
 	engine->reset.prepare = execlists_reset_prepare;
 	engine->reset.rewind = execlists_reset_rewind;
@@ -3184,8 +3186,7 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine)
 	struct intel_uncore *uncore = engine->uncore;
 	u32 base = engine->mmio_base;
 
-	tasklet_init(&engine->execlists.tasklet,
-		     execlists_submission_tasklet, (unsigned long)engine);
+	tasklet_setup(&engine->execlists.tasklet, execlists_submission_tasklet);
 	timer_setup(&engine->execlists.timer, execlists_timeslice, 0);
 	timer_setup(&engine->execlists.preempt, execlists_preempt, 0);
 
@@ -3427,9 +3428,10 @@ static intel_engine_mask_t virtual_submission_mask(struct virtual_engine *ve)
 	return mask;
 }
 
-static void virtual_submission_tasklet(unsigned long data)
+static void virtual_submission_tasklet(struct tasklet_struct *t)
 {
-	struct virtual_engine * const ve = (struct virtual_engine *)data;
+	struct virtual_engine * const ve =
+		from_tasklet(ve, t, base.execlists.tasklet);
 	const int prio = READ_ONCE(ve->base.execlists.queue_priority_hint);
 	intel_engine_mask_t mask;
 	unsigned int n;
@@ -3639,9 +3641,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
 
 	INIT_LIST_HEAD(virtual_queue(ve));
 	ve->base.execlists.queue_priority_hint = INT_MIN;
-	tasklet_init(&ve->base.execlists.tasklet,
-		     virtual_submission_tasklet,
-		     (unsigned long)ve);
+	tasklet_setup(&ve->base.execlists.tasklet, virtual_submission_tasklet);
 
 	intel_context_init(&ve->context, &ve->base);
 
@@ -3669,7 +3669,7 @@ 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.func !=
+		if (sibling->execlists.tasklet.callback !=
 		    execlists_submission_tasklet) {
 			err = -ENODEV;
 			goto err_put;

drivers/gpu/drm/i915/gt/selftest_execlists.c

@@ -608,7 +608,7 @@ static int live_hold_reset(void *arg)
 		}
 		tasklet_disable(&engine->execlists.tasklet);
 
-		engine->execlists.tasklet.func(engine->execlists.tasklet.data);
+		engine->execlists.tasklet.callback(&engine->execlists.tasklet);
 		GEM_BUG_ON(execlists_active(&engine->execlists) != rq);
 
 		i915_request_get(rq);
@@ -4594,7 +4594,7 @@ static int reset_virtual_engine(struct intel_gt *gt,
 	}
 	tasklet_disable(&engine->execlists.tasklet);
 
-	engine->execlists.tasklet.func(engine->execlists.tasklet.data);
+	engine->execlists.tasklet.callback(&engine->execlists.tasklet);
 	GEM_BUG_ON(execlists_active(&engine->execlists) != rq);
 
 	/* Fake a preemption event; failed of course */

drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c

@@ -237,9 +237,10 @@ static void __guc_dequeue(struct intel_engine_cs *engine)
 	execlists->active = execlists->inflight;
 }
 
-static void guc_submission_tasklet(unsigned long data)
+static void guc_submission_tasklet(struct tasklet_struct *t)
 {
-	struct intel_engine_cs * const engine = (struct intel_engine_cs *)data;
+	struct intel_engine_cs * const engine =
+		from_tasklet(engine, t, execlists.tasklet);
 	struct intel_engine_execlists * const execlists = &engine->execlists;
 	struct i915_request **port, *rq;
 	unsigned long flags;
@@ -608,7 +609,7 @@ static void guc_set_default_submission(struct intel_engine_cs *engine)
 {
 	engine->submit_request = guc_submit_request;
 	engine->schedule = i915_schedule;
-	engine->execlists.tasklet.func = guc_submission_tasklet;
+	engine->execlists.tasklet.callback = guc_submission_tasklet;
 
 	engine->reset.prepare = guc_reset_prepare;
 	engine->reset.rewind = guc_reset_rewind;
@@ -700,8 +701,7 @@ int intel_guc_submission_setup(struct intel_engine_cs *engine)
 	 */
 	GEM_BUG_ON(INTEL_GEN(i915) < 11);
 
-	tasklet_init(&engine->execlists.tasklet,
-		     guc_submission_tasklet, (unsigned long)engine);
+	tasklet_setup(&engine->execlists.tasklet, guc_submission_tasklet);
 
 	guc_default_vfuncs(engine);
 	guc_default_irqs(engine);