drm/xe/xe_gt_debugfs: Update handling of xe_force_wake_get return

With xe_force_wake_get() now returning the refcount-incremented
domain mask, a non-zero return value in the case of XE_FORCEWAKE_ALL does
not necessarily indicate success. Use xe_force_wake_ref_has_domain()
determine the status of the call.

Modify the return handling of xe_force_wake_get() accordingly and
pass the return value to xe_force_wake_put().

v3
- return xe_wakeref_t instead of int in xe_force_wake_get()
- xe_force_wake_put() error doesn't need to be checked. It internally
WARNS on domain ack failure.

v5
- return unsigned int for xe_force_wake_get()

v6
- use helper xe_force_wake_ref_has_domain()

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241014075601.2324382-16-himal.prasad.ghimiray@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

1 files changed, 6 insertions, 7 deletions

diff --git a/drivers/gpu/drm/xe/xe_gt_debugfs.c b/drivers/gpu/drm/xe/xe_gt_debugfs.c
index cbc43973ff7e..3e8c351a0eab 100644
--- a/drivers/gpu/drm/xe/xe_gt_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_gt_debugfs.c
@@ -90,22 +90,21 @@ static int hw_engines(struct xe_gt *gt, struct drm_printer *p)
 	struct xe_device *xe = gt_to_xe(gt);
 	struct xe_hw_engine *hwe;
 	enum xe_hw_engine_id id;
-	int err;
+	unsigned int fw_ref;
 
 	xe_pm_runtime_get(xe);
-	err = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
-	if (err) {
+	fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
+	if (!xe_force_wake_ref_has_domain(fw_ref, XE_FORCEWAKE_ALL)) {
 		xe_pm_runtime_put(xe);
-		return err;
+		xe_force_wake_put(gt_to_fw(gt), fw_ref);
+		return -ETIMEDOUT;
 	}
 
 	for_each_hw_engine(hwe, gt, id)
 		xe_hw_engine_print(hwe, p);
 
-	err = xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
+	xe_force_wake_put(gt_to_fw(gt), fw_ref);
 	xe_pm_runtime_put(xe);
-	if (err)
-		return err;
 
 	return 0;
 }