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Date:   Mon, 11 May 2020 16:53:26 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     andrew@...n.ch, f.fainelli@...il.com, vivien.didelot@...il.com
Cc:     davem@...emloft.net, kuba@...nel.org, jiri@...lanox.com,
        idosch@...sch.org, rmk+kernel@...linux.org.uk,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 net-next 03/15] net: dsa: sja1105: keep the VLAN awareness state in a driver variable

From: Vladimir Oltean <vladimir.oltean@....com>

Soon we'll add a third operating mode to the driver. Introduce a
vlan_state to make things more easy to manage, and use it where
applicable.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
Changes in v2:
Be much more thorough, and make sure that things like virtual links and
FDB operations still work properly.

 drivers/net/dsa/sja1105/sja1105.h      |  6 ++++++
 drivers/net/dsa/sja1105/sja1105_main.c | 26 +++++++++++++++++++++-----
 drivers/net/dsa/sja1105/sja1105_vl.c   | 24 ++++++++++++++----------
 include/linux/dsa/sja1105.h            |  2 ++
 net/dsa/tag_sja1105.c                  |  2 +-
 5 files changed, 44 insertions(+), 16 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105.h b/drivers/net/dsa/sja1105/sja1105.h
index a64ace07b89f..5b2b275d01a7 100644
--- a/drivers/net/dsa/sja1105/sja1105.h
+++ b/drivers/net/dsa/sja1105/sja1105.h
@@ -178,6 +178,11 @@ struct sja1105_flow_block {
 	int num_virtual_links;
 };
 
+enum sja1105_vlan_state {
+	SJA1105_VLAN_UNAWARE,
+	SJA1105_VLAN_FILTERING_FULL,
+};
+
 struct sja1105_private {
 	struct sja1105_static_config static_config;
 	bool rgmii_rx_delay[SJA1105_NUM_PORTS];
@@ -193,6 +198,7 @@ struct sja1105_private {
 	 * the switch doesn't confuse them with one another.
 	 */
 	struct mutex mgmt_lock;
+	enum sja1105_vlan_state vlan_state;
 	struct sja1105_tagger_data tagger_data;
 	struct sja1105_ptp_data ptp_data;
 	struct sja1105_tas_data tas_data;
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index d5de9305df25..72e12c02594d 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -1303,7 +1303,7 @@ int sja1105pqrs_fdb_add(struct dsa_switch *ds, int port,
 	l2_lookup.vlanid = vid;
 	l2_lookup.iotag = SJA1105_S_TAG;
 	l2_lookup.mask_macaddr = GENMASK_ULL(ETH_ALEN * 8 - 1, 0);
-	if (dsa_port_is_vlan_filtering(dsa_to_port(ds, port))) {
+	if (priv->vlan_state != SJA1105_VLAN_UNAWARE) {
 		l2_lookup.mask_vlanid = VLAN_VID_MASK;
 		l2_lookup.mask_iotag = BIT(0);
 	} else {
@@ -1366,7 +1366,7 @@ int sja1105pqrs_fdb_del(struct dsa_switch *ds, int port,
 	l2_lookup.vlanid = vid;
 	l2_lookup.iotag = SJA1105_S_TAG;
 	l2_lookup.mask_macaddr = GENMASK_ULL(ETH_ALEN * 8 - 1, 0);
-	if (dsa_port_is_vlan_filtering(dsa_to_port(ds, port))) {
+	if (priv->vlan_state != SJA1105_VLAN_UNAWARE) {
 		l2_lookup.mask_vlanid = VLAN_VID_MASK;
 		l2_lookup.mask_iotag = BIT(0);
 	} else {
@@ -1412,7 +1412,7 @@ static int sja1105_fdb_add(struct dsa_switch *ds, int port,
 	 * for what gets printed in 'bridge fdb show'.  In the case of zero,
 	 * no VID gets printed at all.
 	 */
-	if (!dsa_port_is_vlan_filtering(dsa_to_port(ds, port)))
+	if (priv->vlan_state != SJA1105_VLAN_FILTERING_FULL)
 		vid = 0;
 
 	return priv->info->fdb_add_cmd(ds, port, addr, vid);
@@ -1423,7 +1423,7 @@ static int sja1105_fdb_del(struct dsa_switch *ds, int port,
 {
 	struct sja1105_private *priv = ds->priv;
 
-	if (!dsa_port_is_vlan_filtering(dsa_to_port(ds, port)))
+	if (priv->vlan_state != SJA1105_VLAN_FILTERING_FULL)
 		vid = 0;
 
 	return priv->info->fdb_del_cmd(ds, port, addr, vid);
@@ -1462,7 +1462,7 @@ static int sja1105_fdb_dump(struct dsa_switch *ds, int port,
 		u64_to_ether_addr(l2_lookup.macaddr, macaddr);
 
 		/* We need to hide the dsa_8021q VLANs from the user. */
-		if (!dsa_port_is_vlan_filtering(dsa_to_port(ds, port)))
+		if (priv->vlan_state == SJA1105_VLAN_UNAWARE)
 			l2_lookup.vlanid = 0;
 		cb(macaddr, l2_lookup.vlanid, l2_lookup.lockeds, data);
 	}
@@ -1917,6 +1917,7 @@ static int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled)
 	struct sja1105_l2_lookup_params_entry *l2_lookup_params;
 	struct sja1105_general_params_entry *general_params;
 	struct sja1105_private *priv = ds->priv;
+	enum sja1105_vlan_state state;
 	struct sja1105_table *table;
 	struct sja1105_rule *rule;
 	u16 tpid, tpid2;
@@ -1940,6 +1941,13 @@ static int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled)
 		tpid2 = ETH_P_SJA1105;
 	}
 
+	if (!enabled)
+		state = SJA1105_VLAN_UNAWARE;
+	else
+		state = SJA1105_VLAN_FILTERING_FULL;
+
+	priv->vlan_state = state;
+
 	table = &priv->static_config.tables[BLK_IDX_GENERAL_PARAMS];
 	general_params = table->entries;
 	/* EtherType used to identify inner tagged (C-tag) VLAN traffic */
@@ -1985,6 +1993,14 @@ static int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled)
 	return sja1105_setup_8021q_tagging(ds, !enabled);
 }
 
+bool sja1105_can_use_vlan_as_tags(struct dsa_switch *ds)
+{
+	struct sja1105_private *priv = ds->priv;
+
+	return priv->vlan_state != SJA1105_VLAN_FILTERING_FULL;
+}
+EXPORT_SYMBOL_GPL(sja1105_can_use_vlan_as_tags);
+
 static void sja1105_vlan_add(struct dsa_switch *ds, int port,
 			     const struct switchdev_obj_port_vlan *vlan)
 {
diff --git a/drivers/net/dsa/sja1105/sja1105_vl.c b/drivers/net/dsa/sja1105/sja1105_vl.c
index aa9b0b92f437..312401995b54 100644
--- a/drivers/net/dsa/sja1105/sja1105_vl.c
+++ b/drivers/net/dsa/sja1105/sja1105_vl.c
@@ -353,14 +353,14 @@ int sja1105_vl_redirect(struct sja1105_private *priv, int port,
 	struct sja1105_rule *rule = sja1105_rule_find(priv, cookie);
 	int rc;
 
-	if (dsa_port_is_vlan_filtering(dsa_to_port(priv->ds, port)) &&
-	    key->type != SJA1105_KEY_VLAN_AWARE_VL) {
+	if (priv->vlan_state == SJA1105_VLAN_UNAWARE &&
+	    key->type != SJA1105_KEY_VLAN_UNAWARE_VL) {
 		NL_SET_ERR_MSG_MOD(extack,
-				   "Can only redirect based on {DMAC, VID, PCP}");
+				   "Can only redirect based on DMAC");
 		return -EOPNOTSUPP;
-	} else if (key->type != SJA1105_KEY_VLAN_UNAWARE_VL) {
+	} else if (key->type != SJA1105_KEY_VLAN_AWARE_VL) {
 		NL_SET_ERR_MSG_MOD(extack,
-				   "Can only redirect based on DMAC");
+				   "Can only redirect based on {DMAC, VID, PCP}");
 		return -EOPNOTSUPP;
 	}
 
@@ -602,14 +602,18 @@ int sja1105_vl_gate(struct sja1105_private *priv, int port,
 		return -ERANGE;
 	}
 
-	if (dsa_port_is_vlan_filtering(dsa_to_port(priv->ds, port)) &&
-	    key->type != SJA1105_KEY_VLAN_AWARE_VL) {
+	if (priv->vlan_state == SJA1105_VLAN_UNAWARE &&
+	    key->type != SJA1105_KEY_VLAN_UNAWARE_VL) {
+		dev_err(priv->ds->dev, "1: vlan state %d key type %d\n",
+			priv->vlan_state, key->type);
 		NL_SET_ERR_MSG_MOD(extack,
-				   "Can only gate based on {DMAC, VID, PCP}");
+				   "Can only gate based on DMAC");
 		return -EOPNOTSUPP;
-	} else if (key->type != SJA1105_KEY_VLAN_UNAWARE_VL) {
+	} else if (key->type != SJA1105_KEY_VLAN_AWARE_VL) {
+		dev_err(priv->ds->dev, "2: vlan state %d key type %d\n",
+			priv->vlan_state, key->type);
 		NL_SET_ERR_MSG_MOD(extack,
-				   "Can only gate based on DMAC");
+				   "Can only gate based on {DMAC, VID, PCP}");
 		return -EOPNOTSUPP;
 	}
 
diff --git a/include/linux/dsa/sja1105.h b/include/linux/dsa/sja1105.h
index fa5735c353cd..136481ce3c6f 100644
--- a/include/linux/dsa/sja1105.h
+++ b/include/linux/dsa/sja1105.h
@@ -61,4 +61,6 @@ struct sja1105_port {
 	bool hwts_tx_en;
 };
 
+bool sja1105_can_use_vlan_as_tags(struct dsa_switch *ds);
+
 #endif /* _NET_DSA_SJA1105_H */
diff --git a/net/dsa/tag_sja1105.c b/net/dsa/tag_sja1105.c
index d553bf36bd41..5368cd34bcf4 100644
--- a/net/dsa/tag_sja1105.c
+++ b/net/dsa/tag_sja1105.c
@@ -74,7 +74,7 @@ static inline bool sja1105_is_meta_frame(const struct sk_buff *skb)
  */
 static bool sja1105_filter(const struct sk_buff *skb, struct net_device *dev)
 {
-	if (!dsa_port_is_vlan_filtering(dev->dsa_ptr))
+	if (sja1105_can_use_vlan_as_tags(dev->dsa_ptr->ds))
 		return true;
 	if (sja1105_is_link_local(skb))
 		return true;
-- 
2.17.1

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