[PATCH v2 4/9] drm/xe: Create ordered workqueue for GT TLB invalidation jobs

[Matthew Brost]

No sense to schedule GT TLB invalidation jobs in parallel which target
the same given these all contend on the same lock, create ordered
workqueue for GT TLB invalidation jobs.

Signed-off-by: Matthew Brost <matthew.brost at intel.com>
---
 drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c | 8 ++++++++
 drivers/gpu/drm/xe/xe_gt_types.h            | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c
index 6088df8e159c..f6f32600e8a5 100644
--- a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c
+++ b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c
@@ -3,6 +3,8 @@
  * Copyright © 2023 Intel Corporation
  */
 
+#include <drm/drm_managed.h>
+
 #include "xe_gt_tlb_invalidation.h"
 
 #include "abi/guc_actions_abi.h"
@@ -123,6 +125,12 @@ int xe_gt_tlb_invalidation_init_early(struct xe_gt *gt)
 	INIT_DELAYED_WORK(&gt->tlb_invalidation.fence_tdr,
 			  xe_gt_tlb_fence_timeout);
 
+	gt->tlb_invalidation.job_wq =
+		drmm_alloc_ordered_workqueue(&gt_to_xe(gt)->drm, "gt-tbl-inval-job-wq",
+					     WQ_MEM_RECLAIM);
+	if (IS_ERR(gt->tlb_invalidation.job_wq))
+		return PTR_ERR(gt->tlb_invalidation.job_wq);
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/xe/xe_gt_types.h b/drivers/gpu/drm/xe/xe_gt_types.h
index 96344c604726..dfd4a16da5f0 100644
--- a/drivers/gpu/drm/xe/xe_gt_types.h
+++ b/drivers/gpu/drm/xe/xe_gt_types.h
@@ -210,6 +210,8 @@ struct xe_gt {
 		 * xe_gt_tlb_fence_timeout after the timeut interval is over.
 		 */
 		struct delayed_work fence_tdr;
+		/** @wtlb_invalidation.wq: schedules GT TLB invalidation jobs */
+		struct workqueue_struct *job_wq;
 		/** @tlb_invalidation.lock: protects TLB invalidation fences */
 		spinlock_t lock;
 	} tlb_invalidation;
-- 
2.34.1