From: Rohan G Thomas <rohan.g.thomas@altera.com>

Add the count of the frames dropped by Head-Of-Line Blocking due to
Scheduling(HLBS) error to taprio window drop count stats.

Signed-off-by: Rohan G Thomas <rohan.g.thomas@altera.com>
Reviewed-by: Matthew Gerlach <matthew.gerlach@altera.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index 694d6ee1438197bd4434af6e9b78f022e94ff98f..97e89a604abd7a01bb8e904c38f10716e0a911c1 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -1080,6 +1080,7 @@ static int tc_taprio_configure(struct stmmac_priv *priv,
 		for (i = 0; i < priv->plat->tx_queues_to_use; i++) {
 			priv->xstats.max_sdu_txq_drop[i] = 0;
 			priv->xstats.mtl_est_txq_hlbf[i] = 0;
+			priv->xstats.mtl_est_txq_hlbs[i] = 0;
 		}
 		mutex_unlock(&priv->est_lock);
 	}
@@ -1097,7 +1098,8 @@ static void tc_taprio_stats(struct stmmac_priv *priv,
 
 	for (i = 0; i < priv->plat->tx_queues_to_use; i++)
 		window_drops += priv->xstats.max_sdu_txq_drop[i] +
-				priv->xstats.mtl_est_txq_hlbf[i];
+				priv->xstats.mtl_est_txq_hlbf[i] +
+				priv->xstats.mtl_est_txq_hlbs[i];
 	qopt->stats.window_drops = window_drops;
 
 	/* Transmission overrun doesn't happen for stmmac, hence always 0 */
@@ -1111,7 +1113,8 @@ static void tc_taprio_queue_stats(struct stmmac_priv *priv,
 	int queue = qopt->queue_stats.queue;
 
 	q_stats->stats.window_drops = priv->xstats.max_sdu_txq_drop[queue] +
-				      priv->xstats.mtl_est_txq_hlbf[queue];
+				      priv->xstats.mtl_est_txq_hlbf[queue] +
+				      priv->xstats.mtl_est_txq_hlbs[queue];
 
 	/* Transmission overrun doesn't happen for stmmac, hence always 0 */
 	q_stats->stats.tx_overruns = 0;

-- 
2.35.3

On Thu, 25 Sep 2025 22:06:14 +0800
Rohan G Thomas <rohan.g.thomas@altera.com> wrote:

> From: Rohan G Thomas <rohan.g.thomas@altera.com>
> 
> Add the count of the frames dropped by Head-Of-Line Blocking due to
> Scheduling(HLBS) error to taprio window drop count stats.
> 
> Signed-off-by: Rohan G Thomas <rohan.g.thomas@altera.com>
> Reviewed-by: Matthew Gerlach <matthew.gerlach@altera.com>

Reviewed-by: Furong Xu <0x1207@gmail.com>