[PATCH v3 1/2] drm/xe: Add counter for invalid prefetch pagefaults

[Varun Gupta <varun.gupta@intel.com>]

Add a stats counter for invalid prefetch page faults to avoid
excessive logging.

Originally-by: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Varun Gupta <varun.gupta@intel.com>

---
v3:
 - New patch splitting stats counter from main prefetch implementation (Matt Brost)
 - Renamed from PREFETCH_PAGEFAULT_COUNT to INVALID_PREFETCH_PAGEFAULT_COUNT (Matt Brost)
---
 drivers/gpu/drm/xe/xe_gt_stats.c       | 1 +
 drivers/gpu/drm/xe/xe_gt_stats_types.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_gt_stats.c b/drivers/gpu/drm/xe/xe_gt_stats.c
index fb2904bd0abd..202aebe3300b 100644
--- a/drivers/gpu/drm/xe/xe_gt_stats.c
+++ b/drivers/gpu/drm/xe/xe_gt_stats.c
@@ -35,6 +35,7 @@ static const char *const stat_description[__XE_GT_STATS_NUM_IDS] = {
 	DEF_STAT_STR(SVM_TLB_INVAL_US, "svm_tlb_inval_us"),
 	DEF_STAT_STR(VMA_PAGEFAULT_COUNT, "vma_pagefault_count"),
 	DEF_STAT_STR(VMA_PAGEFAULT_KB, "vma_pagefault_kb"),
+	DEF_STAT_STR(INVALID_PREFETCH_PAGEFAULT_COUNT, "invalid_prefetch_pagefault_count"),
 	DEF_STAT_STR(SVM_4K_PAGEFAULT_COUNT, "svm_4K_pagefault_count"),
 	DEF_STAT_STR(SVM_64K_PAGEFAULT_COUNT, "svm_64K_pagefault_count"),
 	DEF_STAT_STR(SVM_2M_PAGEFAULT_COUNT, "svm_2M_pagefault_count"),
diff --git a/drivers/gpu/drm/xe/xe_gt_stats_types.h b/drivers/gpu/drm/xe/xe_gt_stats_types.h
index b92d013091d5..bc4116c70171 100644
--- a/drivers/gpu/drm/xe/xe_gt_stats_types.h
+++ b/drivers/gpu/drm/xe/xe_gt_stats_types.h
@@ -13,6 +13,7 @@ enum xe_gt_stats_id {
 	XE_GT_STATS_ID_SVM_TLB_INVAL_US,
 	XE_GT_STATS_ID_VMA_PAGEFAULT_COUNT,
 	XE_GT_STATS_ID_VMA_PAGEFAULT_KB,
+	XE_GT_STATS_ID_INVALID_PREFETCH_PAGEFAULT_COUNT,
 	XE_GT_STATS_ID_SVM_4K_PAGEFAULT_COUNT,
 	XE_GT_STATS_ID_SVM_64K_PAGEFAULT_COUNT,
 	XE_GT_STATS_ID_SVM_2M_PAGEFAULT_COUNT,
-- 
2.43.0