[PATCH] drm/xe/vf: Retry GuC state reset until timeout

[Lukasz Laguna <lukasz.laguna@intel.com>]

Instead of using a fixed number of GuC state reset retries, keep
retrying until timeout with sleeps between attempts.

Signed-off-by: Lukasz Laguna <lukasz.laguna@intel.com>
---
 drivers/gpu/drm/xe/xe_gt_sriov_vf.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_vf.c b/drivers/gpu/drm/xe/xe_gt_sriov_vf.c
index 37899fcf5b22..01873896f77b 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_vf.c
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_vf.c
@@ -31,6 +31,7 @@
 #include "xe_lrc.h"
 #include "xe_memirq.h"
 #include "xe_mmio.h"
+#include "xe_sleep.h"
 #include "xe_sriov.h"
 #include "xe_sriov_vf.h"
 #include "xe_sriov_vf_ccs.h"
@@ -86,18 +87,23 @@ static int guc_action_vf_reset(struct xe_guc *guc)
 	return ret > 0 ? -EPROTO : ret;
 }
 
-#define GUC_RESET_VF_STATE_RETRY_MAX	10
+#define GUC_RESET_VF_STATE_TIMEOUT_MS	10000
+#define GUC_RESET_VF_STATE_SLEEP_MS	10
+
 static int vf_reset_guc_state(struct xe_gt *gt)
 {
-	unsigned int retry = GUC_RESET_VF_STATE_RETRY_MAX;
 	struct xe_guc *guc = &gt->uc.guc;
+	unsigned long jiffies_end;
 	int err;
 
+	jiffies_end = jiffies + msecs_to_jiffies(GUC_RESET_VF_STATE_TIMEOUT_MS);
 	do {
 		err = guc_action_vf_reset(guc);
 		if (!err || err != -ETIMEDOUT)
 			break;
-	} while (--retry);
+
+		xe_sleep_relaxed_ms(GUC_RESET_VF_STATE_SLEEP_MS);
+	} while (time_before(jiffies, jiffies_end));
 
 	if (unlikely(err))
 		xe_gt_sriov_err(gt, "Failed to reset GuC state (%pe)\n", ERR_PTR(err));
-- 
2.43.0