1 files changed, 113 insertions, 41 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index 996f2bcd07a2..75ad2da1a37f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -282,16 +282,6 @@ static int tc_init(struct stmmac_priv *priv)
 	if (ret)
 		return -ENOMEM;
 
-	if (!priv->plat->fpe_cfg) {
-		priv->plat->fpe_cfg = devm_kzalloc(priv->device,
-						   sizeof(*priv->plat->fpe_cfg),
-						   GFP_KERNEL);
-		if (!priv->plat->fpe_cfg)
-			return -ENOMEM;
-	} else {
-		memset(priv->plat->fpe_cfg, 0, sizeof(*priv->plat->fpe_cfg));
-	}
-
 	/* Fail silently as we can still use remaining features, e.g. CBS */
 	if (!dma_cap->frpsel)
 		return 0;
@@ -396,6 +386,7 @@ static int tc_setup_cbs(struct stmmac_priv *priv,
 			return ret;
 
 		priv->plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
+		return 0;
 	}
 
 	/* Final adjustments for HW */
@@ -941,9 +932,9 @@ static int tc_taprio_configure(struct stmmac_priv *priv,
 			       struct tc_taprio_qopt_offload *qopt)
 {
 	u32 size, wid = priv->dma_cap.estwid, dep = priv->dma_cap.estdep;
+	struct netlink_ext_ack *extack = qopt->mqprio.extack;
 	struct timespec64 time, current_time, qopt_time;
 	ktime_t current_time_ns;
-	bool fpe = false;
 	int i, ret = 0;
 	u64 ctr;
 
@@ -1028,16 +1019,12 @@ static int tc_taprio_configure(struct stmmac_priv *priv,
 
 		switch (qopt->entries[i].command) {
 		case TC_TAPRIO_CMD_SET_GATES:
-			if (fpe)
-				return -EINVAL;
 			break;
 		case TC_TAPRIO_CMD_SET_AND_HOLD:
 			gates |= BIT(0);
-			fpe = true;
 			break;
 		case TC_TAPRIO_CMD_SET_AND_RELEASE:
 			gates &= ~BIT(0);
-			fpe = true;
 			break;
 		default:
 			return -EOPNOTSUPP;
@@ -1068,16 +1055,6 @@ static int tc_taprio_configure(struct stmmac_priv *priv,
 
 	tc_taprio_map_maxsdu_txq(priv, qopt);
 
-	if (fpe && !priv->dma_cap.fpesel) {
-		mutex_unlock(&priv->est_lock);
-		return -EOPNOTSUPP;
-	}
-
-	/* Actual FPE register configuration will be done after FPE handshake
-	 * is success.
-	 */
-	priv->plat->fpe_cfg->enable = fpe;
-
 	ret = stmmac_est_configure(priv, priv, priv->est,
 				   priv->plat->clk_ptp_rate);
 	mutex_unlock(&priv->est_lock);
@@ -1086,12 +1063,10 @@ static int tc_taprio_configure(struct stmmac_priv *priv,
 		goto disable;
 	}
 
-	netdev_info(priv->dev, "configured EST\n");
-
-	if (fpe) {
-		stmmac_fpe_handshake(priv, true);
-		netdev_info(priv->dev, "start FPE handshake\n");
-	}
+	ret = stmmac_fpe_map_preemption_class(priv, priv->dev, extack,
+					      qopt->mqprio.preemptible_tcs);
+	if (ret)
+		goto disable;
 
 	return 0;
 
@@ -1109,16 +1084,7 @@ disable:
 		mutex_unlock(&priv->est_lock);
 	}
 
-	priv->plat->fpe_cfg->enable = false;
-	stmmac_fpe_configure(priv, priv->ioaddr,
-			     priv->plat->fpe_cfg,
-			     priv->plat->tx_queues_to_use,
-			     priv->plat->rx_queues_to_use,
-			     false);
-	netdev_info(priv->dev, "disabled FPE\n");
-
-	stmmac_fpe_handshake(priv, false);
-	netdev_info(priv->dev, "stop FPE handshake\n");
+	stmmac_fpe_map_preemption_class(priv, priv->dev, extack, 0);
 
 	return ret;
 }
@@ -1174,6 +1140,18 @@ static int tc_setup_taprio(struct stmmac_priv *priv,
 	return err;
 }
 
+static int tc_setup_taprio_without_fpe(struct stmmac_priv *priv,
+				       struct tc_taprio_qopt_offload *qopt)
+{
+	if (!qopt->mqprio.preemptible_tcs)
+		return tc_setup_taprio(priv, qopt);
+
+	NL_SET_ERR_MSG_MOD(qopt->mqprio.extack,
+			   "taprio with FPE is not implemented for this MAC");
+
+	return -EOPNOTSUPP;
+}
+
 static int tc_setup_etf(struct stmmac_priv *priv,
 			struct tc_etf_qopt_offload *qopt)
 {
@@ -1198,6 +1176,13 @@ static int tc_query_caps(struct stmmac_priv *priv,
 			 struct tc_query_caps_base *base)
 {
 	switch (base->type) {
+	case TC_SETUP_QDISC_MQPRIO: {
+		struct tc_mqprio_caps *caps = base->caps;
+
+		caps->validate_queue_counts = true;
+
+		return 0;
+	}
 	case TC_SETUP_QDISC_TAPRIO: {
 		struct tc_taprio_caps *caps = base->caps;
 
@@ -1214,6 +1199,81 @@ static int tc_query_caps(struct stmmac_priv *priv,
 	}
 }
 
+static void stmmac_reset_tc_mqprio(struct net_device *ndev,
+				   struct netlink_ext_ack *extack)
+{
+	struct stmmac_priv *priv = netdev_priv(ndev);
+
+	netdev_reset_tc(ndev);
+	netif_set_real_num_tx_queues(ndev, priv->plat->tx_queues_to_use);
+	stmmac_fpe_map_preemption_class(priv, ndev, extack, 0);
+}
+
+static int tc_setup_dwmac510_mqprio(struct stmmac_priv *priv,
+				    struct tc_mqprio_qopt_offload *mqprio)
+{
+	struct netlink_ext_ack *extack = mqprio->extack;
+	struct tc_mqprio_qopt *qopt = &mqprio->qopt;
+	u32 offset, count, num_stack_tx_queues = 0;
+	struct net_device *ndev = priv->dev;
+	u32 num_tc = qopt->num_tc;
+	int err;
+
+	if (!num_tc) {
+		stmmac_reset_tc_mqprio(ndev, extack);
+		return 0;
+	}
+
+	err = netdev_set_num_tc(ndev, num_tc);
+	if (err)
+		return err;
+
+	for (u32 tc = 0; tc < num_tc; tc++) {
+		offset = qopt->offset[tc];
+		count = qopt->count[tc];
+		num_stack_tx_queues += count;
+
+		err = netdev_set_tc_queue(ndev, tc, count, offset);
+		if (err)
+			goto err_reset_tc;
+	}
+
+	err = netif_set_real_num_tx_queues(ndev, num_stack_tx_queues);
+	if (err)
+		goto err_reset_tc;
+
+	err = stmmac_fpe_map_preemption_class(priv, ndev, extack,
+					      mqprio->preemptible_tcs);
+	if (err)
+		goto err_reset_tc;
+
+	return 0;
+
+err_reset_tc:
+	stmmac_reset_tc_mqprio(ndev, extack);
+
+	return err;
+}
+
+static int tc_setup_mqprio_unimplemented(struct stmmac_priv *priv,
+					 struct tc_mqprio_qopt_offload *mqprio)
+{
+	NL_SET_ERR_MSG_MOD(mqprio->extack,
+			   "mqprio HW offload is not implemented for this MAC");
+	return -EOPNOTSUPP;
+}
+
+const struct stmmac_tc_ops dwmac4_tc_ops = {
+	.init = tc_init,
+	.setup_cls_u32 = tc_setup_cls_u32,
+	.setup_cbs = tc_setup_cbs,
+	.setup_cls = tc_setup_cls,
+	.setup_taprio = tc_setup_taprio_without_fpe,
+	.setup_etf = tc_setup_etf,
+	.query_caps = tc_query_caps,
+	.setup_mqprio = tc_setup_mqprio_unimplemented,
+};
+
 const struct stmmac_tc_ops dwmac510_tc_ops = {
 	.init = tc_init,
 	.setup_cls_u32 = tc_setup_cls_u32,
@@ -1222,4 +1282,16 @@ const struct stmmac_tc_ops dwmac510_tc_ops = {
 	.setup_taprio = tc_setup_taprio,
 	.setup_etf = tc_setup_etf,
 	.query_caps = tc_query_caps,
+	.setup_mqprio = tc_setup_dwmac510_mqprio,
+};
+
+const struct stmmac_tc_ops dwxgmac_tc_ops = {
+	.init = tc_init,
+	.setup_cls_u32 = tc_setup_cls_u32,
+	.setup_cbs = tc_setup_cbs,
+	.setup_cls = tc_setup_cls,
+	.setup_taprio = tc_setup_taprio_without_fpe,
+	.setup_etf = tc_setup_etf,
+	.query_caps = tc_query_caps,
+	.setup_mqprio = tc_setup_mqprio_unimplemented,
 };