1 files changed, 41 insertions, 29 deletions

diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c
index f5c3d8a97ec6..1c92b96e4c32 100644
--- a/drivers/gpu/drm/xe/xe_guc_submit.c
+++ b/drivers/gpu/drm/xe/xe_guc_submit.c
@@ -10,6 +10,7 @@
 #include <linux/circ_buf.h>
 #include <linux/dma-fence-array.h>
 
+#include <drm/drm_drv.h>
 #include <drm/drm_managed.h>
 
 #include "abi/guc_actions_abi.h"
@@ -37,6 +38,7 @@
 #include "xe_macros.h"
 #include "xe_map.h"
 #include "xe_mocs.h"
+#include "xe_module.h"
 #include "xe_pm.h"
 #include "xe_ring_ops_types.h"
 #include "xe_sched_job.h"
@@ -232,17 +234,9 @@ static bool exec_queue_killed_or_banned_or_wedged(struct xe_exec_queue *q)
 static void guc_submit_sw_fini(struct drm_device *drm, void *arg)
 {
 	struct xe_guc *guc = arg;
-	struct xe_device *xe = guc_to_xe(guc);
 	struct xe_gt *gt = guc_to_gt(guc);
-	int ret;
-
-	ret = wait_event_timeout(guc->submission_state.fini_wq,
-				 xa_empty(&guc->submission_state.exec_queue_lookup),
-				 HZ * 5);
 
-	drain_workqueue(xe->destroy_wq);
-
-	xe_gt_assert(gt, ret);
+	xe_gt_assert(gt, xa_empty(&guc->submission_state.exec_queue_lookup));
 
 	xa_destroy(&guc->submission_state.exec_queue_lookup);
 }
@@ -319,8 +313,6 @@ int xe_guc_submit_init(struct xe_guc *guc, unsigned int num_ids)
 
 	xa_init(&guc->submission_state.exec_queue_lookup);
 
-	init_waitqueue_head(&guc->submission_state.fini_wq);
-
 	primelockdep(guc);
 
 	guc->submission_state.initialized = true;
@@ -411,9 +403,6 @@ static void __release_guc_id(struct xe_guc *guc, struct xe_exec_queue *q,
 	xe_guc_id_mgr_release_locked(&guc->submission_state.idm,
 				     q->guc->id, q->width);
 
-	if (xa_empty(&guc->submission_state.exec_queue_lookup))
-		wake_up(&guc->submission_state.fini_wq);
-
 	mutex_unlock(&guc->submission_state.lock);
 }
 
@@ -1685,6 +1674,7 @@ static void guc_exec_queue_fini(struct xe_exec_queue *q)
 {
 	struct xe_guc_exec_queue *ge = q->guc;
 	struct xe_guc *guc = exec_queue_to_guc(q);
+	struct drm_device *drm = &guc_to_xe(guc)->drm;
 
 	if (xe_exec_queue_is_multi_queue_secondary(q)) {
 		struct xe_exec_queue_group *group = q->multi_queue.group;
@@ -1703,36 +1693,52 @@ static void guc_exec_queue_fini(struct xe_exec_queue *q)
 	 * (timeline name).
 	 */
 	kfree_rcu(ge, rcu);
+
+	drm_dev_put(drm);
 }
 
-static void __guc_exec_queue_destroy_async(struct work_struct *w)
+static void guc_exec_queue_do_destroy(struct xe_exec_queue *q)
 {
-	struct xe_guc_exec_queue *ge =
-		container_of(w, struct xe_guc_exec_queue, destroy_async);
-	struct xe_exec_queue *q = ge->q;
+	struct xe_guc_exec_queue *ge = q->guc;
 	struct xe_guc *guc = exec_queue_to_guc(q);
+	struct xe_device *xe = guc_to_xe(guc);
+	struct drm_device *drm = &xe->drm;
+
+	/*
+	 * guc_exec_queue_fini() drops the queue's drm_device ref.
+	 * Keep the device alive until the PM-runtime guard unwinds.
+	 */
+	drm_dev_get(drm);
+
+	scoped_guard(xe_pm_runtime, xe) {
+		trace_xe_exec_queue_destroy(q);
 
-	guard(xe_pm_runtime)(guc_to_xe(guc));
-	trace_xe_exec_queue_destroy(q);
+		/* Confirm no work left behind accessing device structures */
+		cancel_delayed_work_sync(&ge->sched.base.work_tdr);
 
-	/* Confirm no work left behind accessing device structures */
-	cancel_delayed_work_sync(&ge->sched.base.work_tdr);
+		xe_exec_queue_fini(q);
+	}
 
-	xe_exec_queue_fini(q);
+	drm_dev_put(drm);
 }
 
-static void guc_exec_queue_destroy_async(struct xe_exec_queue *q)
+static void __guc_exec_queue_destroy_async(struct work_struct *w)
 {
-	struct xe_guc *guc = exec_queue_to_guc(q);
-	struct xe_device *xe = guc_to_xe(guc);
+	struct xe_guc_exec_queue *ge =
+		container_of(w, struct xe_guc_exec_queue, destroy_async);
+
+	guc_exec_queue_do_destroy(ge->q);
+}
 
+static void guc_exec_queue_destroy_async(struct xe_exec_queue *q)
+{
 	INIT_WORK(&q->guc->destroy_async, __guc_exec_queue_destroy_async);
 
 	/* We must block on kernel engines so slabs are empty on driver unload */
 	if (q->flags & EXEC_QUEUE_FLAG_PERMANENT || exec_queue_wedged(q))
-		__guc_exec_queue_destroy_async(&q->guc->destroy_async);
+		guc_exec_queue_do_destroy(q);
 	else
-		queue_work(xe->destroy_wq, &q->guc->destroy_async);
+		xe_destroy_wq_queue(&q->guc->destroy_async);
 }
 
 static void __guc_exec_queue_destroy(struct xe_guc *guc, struct xe_exec_queue *q)
@@ -1927,6 +1933,7 @@ static int guc_exec_queue_init(struct xe_exec_queue *q)
 {
 	struct xe_gpu_scheduler *sched;
 	struct xe_guc *guc = exec_queue_to_guc(q);
+	struct drm_device *drm = &guc_to_xe(guc)->drm;
 	struct workqueue_struct *submit_wq = NULL;
 	struct xe_guc_exec_queue *ge;
 	long timeout;
@@ -1938,6 +1945,8 @@ static int guc_exec_queue_init(struct xe_exec_queue *q)
 	if (!ge)
 		return -ENOMEM;
 
+	drm_dev_get(drm);
+
 	q->guc = ge;
 	ge->q = q;
 	init_rcu_head(&ge->rcu);
@@ -1955,6 +1964,8 @@ static int guc_exec_queue_init(struct xe_exec_queue *q)
 
 	xe_exec_queue_assign_name(q, q->guc->id);
 
+	strscpy(ge->name, q->name, sizeof(ge->name));
+
 	/*
 	 * Use primary queue's submit_wq for all secondary queues of a
 	 * multi queue group. This serialization avoids any locking around
@@ -1969,7 +1980,7 @@ static int guc_exec_queue_init(struct xe_exec_queue *q)
 	err = xe_sched_init(&ge->sched, &drm_sched_ops, &xe_sched_ops,
 			    submit_wq, xe_lrc_ring_size() / MAX_JOB_SIZE_BYTES, 64,
 			    timeout, guc_to_gt(guc)->ordered_wq, NULL,
-			    q->name, gt_to_xe(q->gt)->drm.dev);
+			    ge->name, gt_to_xe(q->gt)->drm.dev);
 	if (err)
 		goto err_release_id;
 
@@ -2014,6 +2025,7 @@ err_release_id:
 	release_guc_id(guc, q);
 err_free:
 	kfree(ge);
+	drm_dev_put(drm);
 
 	return err;
 }