[PATCH 2/2] drm/xe: Add stats for tlb invalidation count

[Nirmoy Das]

Add stats for tlb invalidadtion count which can be viewed with per GT
stat debugfs file.

Example output:
cat /sys/kernel/debug/dri/0/gt0/stats
tlb_inval_count: 22

Cc: Matthew Brost <matthew.brost at intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>
---
 drivers/gpu/drm/xe/xe_gt_stats.c            | 1 +
 drivers/gpu/drm/xe/xe_gt_stats.h            | 1 +
 drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c | 2 ++
 3 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_gt_stats.c b/drivers/gpu/drm/xe/xe_gt_stats.c
index cc69d748e8f6..adb5a9aa6bd3 100644
--- a/drivers/gpu/drm/xe/xe_gt_stats.c
+++ b/drivers/gpu/drm/xe/xe_gt_stats.c
@@ -15,6 +15,7 @@ void xe_gt_stats_incr(struct xe_gt *gt, enum xe_gt_counter_stats id, int incr)
 }
 
 static const char *const stat_description[] = {
+	"tlb_inval_count",
 };
 
 int xe_gt_stats_print_info(struct xe_gt *gt, struct drm_printer *p)
diff --git a/drivers/gpu/drm/xe/xe_gt_stats.h b/drivers/gpu/drm/xe/xe_gt_stats.h
index e83155ab1fdb..11b8ed17f9d9 100644
--- a/drivers/gpu/drm/xe/xe_gt_stats.h
+++ b/drivers/gpu/drm/xe/xe_gt_stats.h
@@ -12,6 +12,7 @@ struct xe_gt;
 //struct drm_printer;
 
 enum xe_gt_counter_stats {
+	XE_GT_COUNTER_TLB_INVAL,
 	XE_GT_COUNTER_STATS_NUM,
 };
 
diff --git a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c
index 87cb76a8718c..e3cdb0e041af 100644
--- a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c
+++ b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c
@@ -16,6 +16,7 @@
 #include "xe_pm.h"
 #include "xe_sriov.h"
 #include "xe_trace.h"
+#include "xe_gt_stats.h"
 #include "regs/xe_guc_regs.h"
 
 #define FENCE_STACK_BIT		DMA_FENCE_FLAG_USER_BITS
@@ -213,6 +214,7 @@ static int send_tlb_invalidation(struct xe_guc *guc,
 			gt->tlb_invalidation.seqno = 1;
 	}
 	mutex_unlock(&guc->ct.lock);
+	xe_gt_stats_incr(gt, XE_GT_COUNTER_TLB_INVAL, 1);
 
 	return ret;
 }
-- 
2.42.0