[PATCH v2 3/4] drm/xe: Extract xe_gt_idle() helper

[Aravind Iddamsetty <aravind.iddamsetty@linux.intel.com>]

This would be used in other places outside of gt_reset path.

v2:
1. Add kernel doc for xe_gt_idle (Michal)
2. fix return as no actual error is reported by xe_uc_stop (Himal)

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Aravind Iddamsetty <aravind.iddamsetty@linux.intel.com>
---
 drivers/gpu/drm/xe/xe_gt.c | 28 ++++++++++++++++++----------
 drivers/gpu/drm/xe/xe_gt.h |  1 +
 2 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_gt.c b/drivers/gpu/drm/xe/xe_gt.c
index 491d0413de15..a24340219c30 100644
--- a/drivers/gpu/drm/xe/xe_gt.c
+++ b/drivers/gpu/drm/xe/xe_gt.c
@@ -629,6 +629,23 @@ static int do_gt_restart(struct xe_gt *gt)
 	return 0;
 }
 
+/**
+ * xe_gt_idle: Idle the GT.
+ * @gt: The gt object
+ *
+ * Typically called before initiating any resets.
+ *
+ */
+void xe_gt_idle(struct xe_gt *gt)
+{
+	xe_gt_sanitize(gt);
+	xe_uc_gucrc_disable(&gt->uc);
+	xe_uc_stop_prepare(&gt->uc);
+	xe_gt_pagefault_reset(gt);
+	xe_uc_stop(&gt->uc);
+	xe_gt_tlb_invalidation_reset(gt);
+}
+
 static int gt_reset(struct xe_gt *gt)
 {
 	int err;
@@ -645,21 +662,12 @@ static int gt_reset(struct xe_gt *gt)
 	}
 
 	xe_pm_runtime_get(gt_to_xe(gt));
-	xe_gt_sanitize(gt);
 
 	err = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
 	if (err)
 		goto err_msg;
 
-	xe_uc_gucrc_disable(&gt->uc);
-	xe_uc_stop_prepare(&gt->uc);
-	xe_gt_pagefault_reset(gt);
-
-	err = xe_uc_stop(&gt->uc);
-	if (err)
-		goto err_out;
-
-	xe_gt_tlb_invalidation_reset(gt);
+	xe_gt_idle(gt);
 
 	err = do_gt_reset(gt);
 	if (err)
diff --git a/drivers/gpu/drm/xe/xe_gt.h b/drivers/gpu/drm/xe/xe_gt.h
index ed6ea8057e35..dcc1023d20e8 100644
--- a/drivers/gpu/drm/xe/xe_gt.h
+++ b/drivers/gpu/drm/xe/xe_gt.h
@@ -43,6 +43,7 @@ int xe_gt_resume(struct xe_gt *gt);
 void xe_gt_reset_async(struct xe_gt *gt);
 void xe_gt_sanitize(struct xe_gt *gt);
 void xe_gt_remove(struct xe_gt *gt);
+void xe_gt_idle(struct xe_gt *gt);
 
 /**
  * xe_gt_any_hw_engine_by_reset_domain - scan the list of engines and return the
-- 
2.25.1