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From: Matthew Brost <matthew.brost@intel.com>
To: intel-xe@lists.freedesktop.org
Subject: [PATCH v9 12/34] drm/xe: Move GGTT lock init to alloc
Date: Wed,  8 Oct 2025 11:04:38 -0700	[thread overview]
Message-ID: <20251008180500.3261209-13-matthew.brost@intel.com> (raw)
In-Reply-To: <20251008180500.3261209-1-matthew.brost@intel.com>

The GGTT lock is needed very early during GT initialization for a VF;
move the GGTT lock initialization to the allocation phase.

v8:
 - Rework function structure (Michal)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
---
 drivers/gpu/drm/xe/xe_ggtt.c | 39 +++++++++++++++++++++---------------
 1 file changed, 23 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_ggtt.c b/drivers/gpu/drm/xe/xe_ggtt.c
index 7fdd0a97a628..aca7ae5489b9 100644
--- a/drivers/gpu/drm/xe/xe_ggtt.c
+++ b/drivers/gpu/drm/xe/xe_ggtt.c
@@ -159,6 +159,16 @@ static void xe_ggtt_clear(struct xe_ggtt *ggtt, u64 start, u64 size)
 	}
 }
 
+static void primelockdep(struct xe_ggtt *ggtt)
+{
+	if (!IS_ENABLED(CONFIG_LOCKDEP))
+		return;
+
+	fs_reclaim_acquire(GFP_KERNEL);
+	might_lock(&ggtt->lock);
+	fs_reclaim_release(GFP_KERNEL);
+}
+
 /**
  * xe_ggtt_alloc - Allocate a GGTT for a given &xe_tile
  * @tile: &xe_tile
@@ -169,9 +179,19 @@ static void xe_ggtt_clear(struct xe_ggtt *ggtt, u64 start, u64 size)
  */
 struct xe_ggtt *xe_ggtt_alloc(struct xe_tile *tile)
 {
-	struct xe_ggtt *ggtt = drmm_kzalloc(&tile_to_xe(tile)->drm, sizeof(*ggtt), GFP_KERNEL);
-	if (ggtt)
-		ggtt->tile = tile;
+	struct xe_device *xe = tile_to_xe(tile);
+	struct xe_ggtt *ggtt;
+
+	ggtt = drmm_kzalloc(&xe->drm, sizeof(*ggtt), GFP_KERNEL);
+	if (!ggtt)
+		return NULL;
+
+	if (drmm_mutex_init(&xe->drm, &ggtt->lock))
+		return NULL;
+
+	primelockdep(ggtt);
+	ggtt->tile = tile;
+
 	return ggtt;
 }
 
@@ -180,7 +200,6 @@ static void ggtt_fini_early(struct drm_device *drm, void *arg)
 	struct xe_ggtt *ggtt = arg;
 
 	destroy_workqueue(ggtt->wq);
-	mutex_destroy(&ggtt->lock);
 	drm_mm_takedown(&ggtt->mm);
 }
 
@@ -198,16 +217,6 @@ void xe_ggtt_might_lock(struct xe_ggtt *ggtt)
 }
 #endif
 
-static void primelockdep(struct xe_ggtt *ggtt)
-{
-	if (!IS_ENABLED(CONFIG_LOCKDEP))
-		return;
-
-	fs_reclaim_acquire(GFP_KERNEL);
-	might_lock(&ggtt->lock);
-	fs_reclaim_release(GFP_KERNEL);
-}
-
 static const struct xe_ggtt_pt_ops xelp_pt_ops = {
 	.pte_encode_flags = xelp_ggtt_pte_flags,
 	.ggtt_set_pte = xe_ggtt_set_pte,
@@ -227,8 +236,6 @@ static void __xe_ggtt_init_early(struct xe_ggtt *ggtt, u32 reserved)
 {
 	drm_mm_init(&ggtt->mm, reserved,
 		    ggtt->size - reserved);
-	mutex_init(&ggtt->lock);
-	primelockdep(ggtt);
 }
 
 int xe_ggtt_init_kunit(struct xe_ggtt *ggtt, u32 reserved, u32 size)
-- 
2.34.1


  parent reply	other threads:[~2025-10-08 18:05 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-08 18:04 [PATCH v9 00/34] VF migration redesign Matthew Brost
2025-10-08 18:04 ` [PATCH v9 01/34] drm/xe: Add NULL checks to scratch LRC allocation Matthew Brost
2025-10-08 18:04 ` [PATCH v9 02/34] drm/xe: Save off position in ring in which a job was programmed Matthew Brost
2025-10-08 18:04 ` [PATCH v9 03/34] drm/xe/guc: Track pending-enable source in submission state Matthew Brost
2025-10-08 18:04 ` [PATCH v9 04/34] drm/xe: Track LR jobs in DRM scheduler pending list Matthew Brost
2025-10-08 18:04 ` [PATCH v9 05/34] drm/xe: Return first unsignaled job first pending job helper Matthew Brost
2025-10-08 18:04 ` [PATCH v9 06/34] drm/xe: Don't change LRC ring head on job resubmission Matthew Brost
2025-10-08 18:04 ` [PATCH v9 07/34] drm/xe: Make LRC W/A scratch buffer usage consistent Matthew Brost
2025-10-08 18:04 ` [PATCH v9 08/34] drm/xe/vf: Add xe_gt_recovery_pending helper Matthew Brost
2025-10-08 18:04 ` [PATCH v9 09/34] drm/xe/vf: Make VF recovery run on per-GT worker Matthew Brost
2025-10-08 18:04 ` [PATCH v9 10/34] drm/xe/vf: Abort H2G sends during VF post-migration recovery Matthew Brost
2025-10-08 18:04 ` [PATCH v9 11/34] drm/xe/vf: Remove memory allocations from VF post migration recovery Matthew Brost
2025-10-08 18:04 ` Matthew Brost [this message]
2025-10-08 18:04 ` [PATCH v9 13/34] drm/xe/vf: Move LMEM config to tile layer Matthew Brost
2025-10-08 20:36   ` Michal Wajdeczko
2025-10-08 18:04 ` [PATCH v9 14/34] drm/xe/vf: Close multi-GT GGTT shift race Matthew Brost
2025-10-08 21:11   ` Michal Wajdeczko
2025-10-08 18:04 ` [PATCH v9 15/34] drm/xe/vf: Teardown VF post migration worker on driver unload Matthew Brost
2025-10-08 18:04 ` [PATCH v9 16/34] drm/xe/vf: Don't allow GT reset to be queued during VF post migration recovery Matthew Brost
2025-10-08 18:04 ` [PATCH v9 17/34] drm/xe/vf: Wakeup in GuC backend on " Matthew Brost
2025-10-08 18:04 ` [PATCH v9 18/34] drm/xe/vf: Avoid indefinite blocking in preempt rebind worker for VFs supporting migration Matthew Brost
2025-10-08 18:04 ` [PATCH v9 19/34] drm/xe/vf: Use GUC_HXG_TYPE_EVENT for GuC context register Matthew Brost
2025-10-08 18:04 ` [PATCH v9 20/34] drm/xe/vf: Flush and stop CTs in VF post migration recovery Matthew Brost
2025-10-08 18:04 ` [PATCH v9 21/34] drm/xe/vf: Reset TLB invalidations during " Matthew Brost
2025-10-08 18:04 ` [PATCH v9 22/34] drm/xe/vf: Kickstart after resfix in " Matthew Brost
2025-10-08 18:04 ` [PATCH v9 23/34] drm/xe: Add CTB_H2G_BUFFER_OFFSET define Matthew Brost
2025-10-08 18:04 ` [PATCH v9 24/34] drm/xe/vf: Start CTs before resfix VF post migration recovery Matthew Brost
2025-10-08 18:04 ` [PATCH v9 25/34] drm/xe/vf: Abort VF post migration recovery on failure Matthew Brost
2025-10-08 19:49   ` Niranjana Vishwanathapura
2025-10-08 18:04 ` [PATCH v9 26/34] drm/xe/vf: Replay GuC submission state on pause / unpause Matthew Brost
2025-10-08 18:04 ` [PATCH v9 27/34] drm/xe: Move queue init before LRC creation Matthew Brost
2025-10-08 18:04 ` [PATCH v9 28/34] drm/xe/vf: Add debug prints for GuC replaying state during VF recovery Matthew Brost
2025-10-08 18:04 ` [PATCH v9 29/34] drm/xe/vf: Workaround for race condition in GuC firmware during VF pause Matthew Brost
2025-10-08 18:04 ` [PATCH v9 30/34] drm/xe: Use PPGTT addresses for TLB invalidation to avoid GGTT fixups Matthew Brost
2025-10-08 18:04 ` [PATCH v9 31/34] drm/xe/vf: Use primary GT ordered work queue on media GT on PTL VF Matthew Brost
2025-10-08 18:04 ` [PATCH v9 32/34] drm/xe/vf: Ensure media GT VF recovery runs after primary GT on PTL Matthew Brost
2025-10-08 18:04 ` [PATCH v9 33/34] drm/xe/vf: Rebase CCS save/restore BB GGTT addresses Matthew Brost
2025-10-08 18:05 ` [PATCH v9 34/34] drm/xe/guc: Increase wait timeout to 2sec after BUSY reply from GuC Matthew Brost
2025-10-08 18:28 ` ✗ CI.checkpatch: warning for VF migration redesign (rev9) Patchwork
2025-10-08 18:29 ` ✓ CI.KUnit: success " Patchwork
2025-10-08 19:04 ` ✓ Xe.CI.BAT: " Patchwork
2025-10-08 21:40 ` ✗ Xe.CI.Full: failure " Patchwork

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