1 files changed, 73 insertions, 13 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index 1c4ea0b1b845..d0a2b289f460 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -232,11 +232,33 @@ static int tc_setup_cls_u32(struct stmmac_priv *priv,
 	}
 }
 
+static int tc_rfs_init(struct stmmac_priv *priv)
+{
+	int i;
+
+	priv->rfs_entries_max[STMMAC_RFS_T_VLAN] = 8;
+
+	for (i = 0; i < STMMAC_RFS_T_MAX; i++)
+		priv->rfs_entries_total += priv->rfs_entries_max[i];
+
+	priv->rfs_entries = devm_kcalloc(priv->device,
+					 priv->rfs_entries_total,
+					 sizeof(*priv->rfs_entries),
+					 GFP_KERNEL);
+	if (!priv->rfs_entries)
+		return -ENOMEM;
+
+	dev_info(priv->device, "Enabled RFS Flow TC (entries=%d)\n",
+		 priv->rfs_entries_total);
+
+	return 0;
+}
+
 static int tc_init(struct stmmac_priv *priv)
 {
 	struct dma_features *dma_cap = &priv->dma_cap;
 	unsigned int count;
-	int i;
+	int ret, i;
 
 	if (dma_cap->l3l4fnum) {
 		priv->flow_entries_max = dma_cap->l3l4fnum;
@@ -250,10 +272,14 @@ static int tc_init(struct stmmac_priv *priv)
 		for (i = 0; i < priv->flow_entries_max; i++)
 			priv->flow_entries[i].idx = i;
 
-		dev_info(priv->device, "Enabled Flow TC (entries=%d)\n",
+		dev_info(priv->device, "Enabled L3L4 Flow TC (entries=%d)\n",
 			 priv->flow_entries_max);
 	}
 
+	ret = tc_rfs_init(priv);
+	if (ret)
+		return -ENOMEM;
+
 	if (!priv->plat->fpe_cfg) {
 		priv->plat->fpe_cfg = devm_kzalloc(priv->device,
 						   sizeof(*priv->plat->fpe_cfg),
@@ -607,16 +633,45 @@ static int tc_del_flow(struct stmmac_priv *priv,
 	return ret;
 }
 
+static struct stmmac_rfs_entry *tc_find_rfs(struct stmmac_priv *priv,
+					    struct flow_cls_offload *cls,
+					    bool get_free)
+{
+	int i;
+
+	for (i = 0; i < priv->rfs_entries_total; i++) {
+		struct stmmac_rfs_entry *entry = &priv->rfs_entries[i];
+
+		if (entry->cookie == cls->cookie)
+			return entry;
+		if (get_free && entry->in_use == false)
+			return entry;
+	}
+
+	return NULL;
+}
+
 #define VLAN_PRIO_FULL_MASK (0x07)
 
 static int tc_add_vlan_flow(struct stmmac_priv *priv,
 			    struct flow_cls_offload *cls)
 {
+	struct stmmac_rfs_entry *entry = tc_find_rfs(priv, cls, false);
 	struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
 	struct flow_dissector *dissector = rule->match.dissector;
 	int tc = tc_classid_to_hwtc(priv->dev, cls->classid);
 	struct flow_match_vlan match;
 
+	if (!entry) {
+		entry = tc_find_rfs(priv, cls, true);
+		if (!entry)
+			return -ENOENT;
+	}
+
+	if (priv->rfs_entries_cnt[STMMAC_RFS_T_VLAN] >=
+	    priv->rfs_entries_max[STMMAC_RFS_T_VLAN])
+		return -ENOENT;
+
 	/* Nothing to do here */
 	if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_VLAN))
 		return -EINVAL;
@@ -638,6 +693,12 @@ static int tc_add_vlan_flow(struct stmmac_priv *priv,
 
 		prio = BIT(match.key->vlan_priority);
 		stmmac_rx_queue_prio(priv, priv->hw, prio, tc);
+
+		entry->in_use = true;
+		entry->cookie = cls->cookie;
+		entry->tc = tc;
+		entry->type = STMMAC_RFS_T_VLAN;
+		priv->rfs_entries_cnt[STMMAC_RFS_T_VLAN]++;
 	}
 
 	return 0;
@@ -646,20 +707,19 @@ static int tc_add_vlan_flow(struct stmmac_priv *priv,
 static int tc_del_vlan_flow(struct stmmac_priv *priv,
 			    struct flow_cls_offload *cls)
 {
-	struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
-	struct flow_dissector *dissector = rule->match.dissector;
-	int tc = tc_classid_to_hwtc(priv->dev, cls->classid);
+	struct stmmac_rfs_entry *entry = tc_find_rfs(priv, cls, false);
 
-	/* Nothing to do here */
-	if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_VLAN))
-		return -EINVAL;
+	if (!entry || !entry->in_use || entry->type != STMMAC_RFS_T_VLAN)
+		return -ENOENT;
 
-	if (tc < 0) {
-		netdev_err(priv->dev, "Invalid traffic class\n");
-		return -EINVAL;
-	}
+	stmmac_rx_queue_prio(priv, priv->hw, 0, entry->tc);
+
+	entry->in_use = false;
+	entry->cookie = 0;
+	entry->tc = 0;
+	entry->type = 0;
 
-	stmmac_rx_queue_prio(priv, priv->hw, 0, tc);
+	priv->rfs_entries_cnt[STMMAC_RFS_T_VLAN]--;
 
 	return 0;
 }