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From: Matthew Brost <matthew.brost@intel.com>
To: intel-xe@lists.freedesktop.org
Subject: [PATCH v7 11/32] drm/xe: Move GGTT lock init to alloc
Date: Tue,  7 Oct 2025 04:26:20 -0700	[thread overview]
Message-ID: <20251007112641.2669655-12-matthew.brost@intel.com> (raw)
In-Reply-To: <20251007112641.2669655-1-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.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/xe/xe_ggtt.c | 36 ++++++++++++++++++++++--------------
 1 file changed, 22 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_ggtt.c b/drivers/gpu/drm/xe/xe_ggtt.c
index 7fdd0a97a628..f7717057cd14 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
@@ -170,8 +180,19 @@ 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)
+
+	if (ggtt) {
+		int err;
+
 		ggtt->tile = tile;
+
+		err = drmm_mutex_init(&tile_to_xe(tile)->drm, &ggtt->lock);
+		if (err)
+			ggtt = NULL;
+		else
+			primelockdep(ggtt);
+	}
+
 	return ggtt;
 }
 
@@ -180,7 +201,6 @@ 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 +218,6 @@ 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 +237,6 @@ 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:[~2025-10-07 11:26 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-07 11:26 [PATCH v7 00/32] VF migration redesign Matthew Brost
2025-10-07 11:26 ` [PATCH v7 01/32] drm/xe: Add NULL checks to scratch LRC allocation Matthew Brost
2025-10-07 11:26 ` [PATCH v7 02/32] drm/xe: Save off position in ring in which a job was programmed Matthew Brost
2025-10-07 11:26 ` [PATCH v7 03/32] drm/xe/guc: Track pending-enable source in submission state Matthew Brost
2025-10-07 11:26 ` [PATCH v7 04/32] drm/xe: Track LR jobs in DRM scheduler pending list Matthew Brost
2025-10-07 11:26 ` [PATCH v7 05/32] drm/xe: Don't change LRC ring head on job resubmission Matthew Brost
2025-10-07 12:29   ` Matthew Auld
2025-10-07 13:00     ` Matthew Brost
2025-10-07 11:26 ` [PATCH v7 06/32] drm/xe: Make LRC W/A scratch buffer usage consistent Matthew Brost
2025-10-07 11:26 ` [PATCH v7 07/32] drm/xe/vf: Add xe_gt_recovery_pending helper Matthew Brost
2025-10-07 11:26 ` [PATCH v7 08/32] drm/xe/vf: Make VF recovery run on per-GT worker Matthew Brost
2025-10-07 11:26 ` [PATCH v7 09/32] drm/xe/vf: Abort H2G sends during VF post-migration recovery Matthew Brost
2025-10-07 11:26 ` [PATCH v7 10/32] drm/xe/vf: Remove memory allocations from VF post migration recovery Matthew Brost
2025-10-07 11:26 ` Matthew Brost [this message]
2025-10-07 11:47   ` [PATCH v7 11/32] drm/xe: Move GGTT lock init to alloc Michal Wajdeczko
2025-10-07 12:53     ` Matthew Brost
2025-10-07 11:26 ` [PATCH v7 12/32] drm/xe/vf: Close multi-GT GGTT shift race Matthew Brost
2025-10-07 13:03   ` Michal Wajdeczko
2025-10-07 11:26 ` [PATCH v7 13/32] drm/xe/vf: Teardown VF post migration worker on driver unload Matthew Brost
2025-10-07 11:26 ` [PATCH v7 14/32] drm/xe/vf: Don't allow GT reset to be queued during VF post migration recovery Matthew Brost
2025-10-07 11:26 ` [PATCH v7 15/32] drm/xe/vf: Wakeup in GuC backend on " Matthew Brost
2025-10-07 11:26 ` [PATCH v7 16/32] drm/xe/vf: Avoid indefinite blocking in preempt rebind worker for VFs supporting migration Matthew Brost
2025-10-07 11:26 ` [PATCH v7 17/32] drm/xe/vf: Use GUC_HXG_TYPE_EVENT for GuC context register Matthew Brost
2025-10-07 11:26 ` [PATCH v7 18/32] drm/xe/vf: Flush and stop CTs in VF post migration recovery Matthew Brost
2025-10-07 11:26 ` [PATCH v7 19/32] drm/xe/vf: Reset TLB invalidations during " Matthew Brost
2025-10-07 11:26 ` [PATCH v7 20/32] drm/xe/vf: Kickstart after resfix in " Matthew Brost
2025-10-07 11:26 ` [PATCH v7 21/32] drm/xe: Add CTB_H2G_BUFFER_OFFSET define Matthew Brost
2025-10-07 11:26 ` [PATCH v7 22/32] drm/xe/vf: Start CTs before resfix VF post migration recovery Matthew Brost
2025-10-07 11:26 ` [PATCH v7 23/32] drm/xe/vf: Abort VF post migration recovery on failure Matthew Brost
2025-10-07 11:26 ` [PATCH v7 24/32] drm/xe/vf: Replay GuC submission state on pause / unpause Matthew Brost
2025-10-07 11:26 ` [PATCH v7 25/32] drm/xe: Move queue init before LRC creation Matthew Brost
2025-10-07 11:26 ` [PATCH v7 26/32] drm/xe/vf: Add debug prints for GuC replaying state during VF recovery Matthew Brost
2025-10-07 11:26 ` [PATCH v7 27/32] drm/xe/vf: Workaround for race condition in GuC firmware during VF pause Matthew Brost
2025-10-07 11:26 ` [PATCH v7 28/32] drm/xe: Use PPGTT addresses for TLB invalidation to avoid GGTT fixups Matthew Brost
2025-10-07 11:26 ` [PATCH v7 29/32] drm/xe/vf: Use primary GT ordered work queue on media GT on PTL VF Matthew Brost
2025-10-07 11:26 ` [PATCH v7 30/32] drm/xe/vf: Ensure media GT VF recovery runs after primary GT on PTL Matthew Brost
2025-10-07 11:26 ` [PATCH v7 31/32] drm/xe/vf: Rebase CCS save/restore BB GGTT addresses Matthew Brost
2025-10-07 11:26 ` [PATCH v7 32/32] drm/xe/guc: Increase wait timeout to 2sec after BUSY reply from GuC Matthew Brost
2025-10-07 11:38 ` ✗ CI.checkpatch: warning for VF migration redesign (rev7) Patchwork
2025-10-07 11:39 ` ✓ CI.KUnit: success " Patchwork
2025-10-07 12:26 ` ✗ Xe.CI.BAT: failure " Patchwork
2025-10-07 14:23 ` ✗ Xe.CI.Full: " Patchwork

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