[PATCH 2/2] drm/xe: Create debugfs for tlb inval stats

[Nirmoy Das <nirmoy.das@intel.com>]

Create debugfs file for each GT to dump tlb sent/receive
stats.

Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Sai Gowtham Ch <sai.gowtham.ch@intel.com>
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
---
 drivers/gpu/drm/xe/xe_gt_debugfs.c          | 9 +++++++++
 drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c | 7 +++++++
 drivers/gpu/drm/xe/xe_gt_tlb_invalidation.h | 2 ++
 3 files changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_gt_debugfs.c b/drivers/gpu/drm/xe/xe_gt_debugfs.c
index 5e7fd937917a..959d979927dd 100644
--- a/drivers/gpu/drm/xe/xe_gt_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_gt_debugfs.c
@@ -17,6 +17,7 @@
 #include "xe_gt_mcr.h"
 #include "xe_gt_sriov_pf_debugfs.h"
 #include "xe_gt_sriov_vf_debugfs.h"
+#include "xe_gt_tlb_invalidation.h"
 #include "xe_gt_topology.h"
 #include "xe_hw_engine.h"
 #include "xe_lrc.h"
@@ -269,6 +270,13 @@ static int vecs_default_lrc(struct xe_gt *gt, struct drm_printer *p)
 	return 0;
 }
 
+static int tlb_stats(struct xe_gt *gt, struct drm_printer *p)
+{
+	xe_gt_tlb_dump(gt, p);
+
+	return 0;
+}
+
 static const struct drm_info_list debugfs_list[] = {
 	{"hw_engines", .show = xe_gt_debugfs_simple_show, .data = hw_engines},
 	{"force_reset", .show = xe_gt_debugfs_simple_show, .data = force_reset},
@@ -286,6 +294,7 @@ static const struct drm_info_list debugfs_list[] = {
 	{"default_lrc_bcs", .show = xe_gt_debugfs_simple_show, .data = bcs_default_lrc},
 	{"default_lrc_vcs", .show = xe_gt_debugfs_simple_show, .data = vcs_default_lrc},
 	{"default_lrc_vecs", .show = xe_gt_debugfs_simple_show, .data = vecs_default_lrc},
+	{"tlb_stats", .show = xe_gt_debugfs_simple_show, .data = tlb_stats},
 };
 
 void xe_gt_debugfs_register(struct xe_gt *gt)
diff --git a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c
index f84717c1aafa..62a6f42b6c60 100644
--- a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c
+++ b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c
@@ -540,3 +540,10 @@ void xe_gt_tlb_invalidation_fence_fini(struct xe_gt_tlb_invalidation_fence *fenc
 {
 	xe_pm_runtime_put(gt_to_xe(fence->gt));
 }
+
+void xe_gt_tlb_dump(struct xe_gt *gt, struct drm_printer *p)
+{
+	drm_printf(p, "GT%d, TLB Requests sent: %llu, received: %llu\n",
+		   gt->info.id, atomic64_read(&gt->tlb_invalidation.sent_count),
+		   atomic64_read(&gt->tlb_invalidation.received_count));
+}
diff --git a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.h b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.h
index a84065fa324c..f420029ec02d 100644
--- a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.h
+++ b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.h
@@ -10,6 +10,7 @@
 
 #include "xe_gt_tlb_invalidation_types.h"
 
+struct drm_printer;
 struct xe_gt;
 struct xe_guc;
 struct xe_vma;
@@ -36,4 +37,5 @@ xe_gt_tlb_invalidation_fence_wait(struct xe_gt_tlb_invalidation_fence *fence)
 	dma_fence_wait(&fence->base, false);
 }
 
+void xe_gt_tlb_dump(struct xe_gt *gt, struct drm_printer *p);
 #endif	/* _XE_GT_TLB_INVALIDATION_ */
-- 
2.42.0