1 files changed, 237 insertions, 90 deletions

diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index a08e4f530c1c..e6c18b598d5c 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -20,11 +20,13 @@ struct ocelot_mact_entry {
 	enum macaccess_entry_type type;
 };
 
+/* Caller must hold &ocelot->mact_lock */
 static inline u32 ocelot_mact_read_macaccess(struct ocelot *ocelot)
 {
 	return ocelot_read(ocelot, ANA_TABLES_MACACCESS);
 }
 
+/* Caller must hold &ocelot->mact_lock */
 static inline int ocelot_mact_wait_for_completion(struct ocelot *ocelot)
 {
 	u32 val;
@@ -36,6 +38,7 @@ static inline int ocelot_mact_wait_for_completion(struct ocelot *ocelot)
 		TABLE_UPDATE_SLEEP_US, TABLE_UPDATE_TIMEOUT_US);
 }
 
+/* Caller must hold &ocelot->mact_lock */
 static void ocelot_mact_select(struct ocelot *ocelot,
 			       const unsigned char mac[ETH_ALEN],
 			       unsigned int vid)
@@ -67,6 +70,7 @@ int ocelot_mact_learn(struct ocelot *ocelot, int port,
 		ANA_TABLES_MACACCESS_ENTRYTYPE(type) |
 		ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_LEARN);
 	unsigned int mc_ports;
+	int err;
 
 	/* Set MAC_CPU_COPY if the CPU port is used by a multicast entry */
 	if (type == ENTRYTYPE_MACv4)
@@ -79,18 +83,28 @@ int ocelot_mact_learn(struct ocelot *ocelot, int port,
 	if (mc_ports & BIT(ocelot->num_phys_ports))
 		cmd |= ANA_TABLES_MACACCESS_MAC_CPU_COPY;
 
+	mutex_lock(&ocelot->mact_lock);
+
 	ocelot_mact_select(ocelot, mac, vid);
 
 	/* Issue a write command */
 	ocelot_write(ocelot, cmd, ANA_TABLES_MACACCESS);
 
-	return ocelot_mact_wait_for_completion(ocelot);
+	err = ocelot_mact_wait_for_completion(ocelot);
+
+	mutex_unlock(&ocelot->mact_lock);
+
+	return err;
 }
 EXPORT_SYMBOL(ocelot_mact_learn);
 
 int ocelot_mact_forget(struct ocelot *ocelot,
 		       const unsigned char mac[ETH_ALEN], unsigned int vid)
 {
+	int err;
+
+	mutex_lock(&ocelot->mact_lock);
+
 	ocelot_mact_select(ocelot, mac, vid);
 
 	/* Issue a forget command */
@@ -98,7 +112,11 @@ int ocelot_mact_forget(struct ocelot *ocelot,
 		     ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_FORGET),
 		     ANA_TABLES_MACACCESS);
 
-	return ocelot_mact_wait_for_completion(ocelot);
+	err = ocelot_mact_wait_for_completion(ocelot);
+
+	mutex_unlock(&ocelot->mact_lock);
+
+	return err;
 }
 EXPORT_SYMBOL(ocelot_mact_forget);
 
@@ -114,7 +132,9 @@ static void ocelot_mact_init(struct ocelot *ocelot)
 		   | ANA_AGENCTRL_LEARN_IGNORE_VLAN,
 		   ANA_AGENCTRL);
 
-	/* Clear the MAC table */
+	/* Clear the MAC table. We are not concurrent with anyone, so
+	 * holding &ocelot->mact_lock is pointless.
+	 */
 	ocelot_write(ocelot, MACACCESS_CMD_INIT, ANA_TABLES_MACACCESS);
 }
 
@@ -162,48 +182,117 @@ static int ocelot_vlant_set_mask(struct ocelot *ocelot, u16 vid, u32 mask)
 	return ocelot_vlant_wait_for_completion(ocelot);
 }
 
-static void ocelot_port_set_native_vlan(struct ocelot *ocelot, int port,
-					struct ocelot_vlan native_vlan)
+static int ocelot_port_num_untagged_vlans(struct ocelot *ocelot, int port)
 {
-	struct ocelot_port *ocelot_port = ocelot->ports[port];
-	u32 val = 0;
+	struct ocelot_bridge_vlan *vlan;
+	int num_untagged = 0;
 
-	ocelot_port->native_vlan = native_vlan;
+	list_for_each_entry(vlan, &ocelot->vlans, list) {
+		if (!(vlan->portmask & BIT(port)))
+			continue;
 
-	ocelot_rmw_gix(ocelot, REW_PORT_VLAN_CFG_PORT_VID(native_vlan.vid),
-		       REW_PORT_VLAN_CFG_PORT_VID_M,
-		       REW_PORT_VLAN_CFG, port);
+		if (vlan->untagged & BIT(port))
+			num_untagged++;
+	}
+
+	return num_untagged;
+}
+
+static int ocelot_port_num_tagged_vlans(struct ocelot *ocelot, int port)
+{
+	struct ocelot_bridge_vlan *vlan;
+	int num_tagged = 0;
+
+	list_for_each_entry(vlan, &ocelot->vlans, list) {
+		if (!(vlan->portmask & BIT(port)))
+			continue;
+
+		if (!(vlan->untagged & BIT(port)))
+			num_tagged++;
+	}
+
+	return num_tagged;
+}
+
+/* We use native VLAN when we have to mix egress-tagged VLANs with exactly
+ * _one_ egress-untagged VLAN (_the_ native VLAN)
+ */
+static bool ocelot_port_uses_native_vlan(struct ocelot *ocelot, int port)
+{
+	return ocelot_port_num_tagged_vlans(ocelot, port) &&
+	       ocelot_port_num_untagged_vlans(ocelot, port) == 1;
+}
+
+static struct ocelot_bridge_vlan *
+ocelot_port_find_native_vlan(struct ocelot *ocelot, int port)
+{
+	struct ocelot_bridge_vlan *vlan;
+
+	list_for_each_entry(vlan, &ocelot->vlans, list)
+		if (vlan->portmask & BIT(port) && vlan->untagged & BIT(port))
+			return vlan;
+
+	return NULL;
+}
+
+/* Keep in sync REW_TAG_CFG_TAG_CFG and, if applicable,
+ * REW_PORT_VLAN_CFG_PORT_VID, with the bridge VLAN table and VLAN awareness
+ * state of the port.
+ */
+static void ocelot_port_manage_port_tag(struct ocelot *ocelot, int port)
+{
+	struct ocelot_port *ocelot_port = ocelot->ports[port];
+	enum ocelot_port_tag_config tag_cfg;
+	bool uses_native_vlan = false;
 
 	if (ocelot_port->vlan_aware) {
-		if (native_vlan.valid)
-			/* Tag all frames except when VID == DEFAULT_VLAN */
-			val = REW_TAG_CFG_TAG_CFG(1);
+		uses_native_vlan = ocelot_port_uses_native_vlan(ocelot, port);
+
+		if (uses_native_vlan)
+			tag_cfg = OCELOT_PORT_TAG_NATIVE;
+		else if (ocelot_port_num_untagged_vlans(ocelot, port))
+			tag_cfg = OCELOT_PORT_TAG_DISABLED;
 		else
-			/* Tag all frames */
-			val = REW_TAG_CFG_TAG_CFG(3);
+			tag_cfg = OCELOT_PORT_TAG_TRUNK;
 	} else {
-		/* Port tagging disabled. */
-		val = REW_TAG_CFG_TAG_CFG(0);
+		tag_cfg = OCELOT_PORT_TAG_DISABLED;
 	}
-	ocelot_rmw_gix(ocelot, val,
+
+	ocelot_rmw_gix(ocelot, REW_TAG_CFG_TAG_CFG(tag_cfg),
 		       REW_TAG_CFG_TAG_CFG_M,
 		       REW_TAG_CFG, port);
+
+	if (uses_native_vlan) {
+		struct ocelot_bridge_vlan *native_vlan;
+
+		/* Not having a native VLAN is impossible, because
+		 * ocelot_port_num_untagged_vlans has returned 1.
+		 * So there is no use in checking for NULL here.
+		 */
+		native_vlan = ocelot_port_find_native_vlan(ocelot, port);
+
+		ocelot_rmw_gix(ocelot,
+			       REW_PORT_VLAN_CFG_PORT_VID(native_vlan->vid),
+			       REW_PORT_VLAN_CFG_PORT_VID_M,
+			       REW_PORT_VLAN_CFG, port);
+	}
 }
 
 /* Default vlan to clasify for untagged frames (may be zero) */
 static void ocelot_port_set_pvid(struct ocelot *ocelot, int port,
-				 struct ocelot_vlan pvid_vlan)
+				 const struct ocelot_bridge_vlan *pvid_vlan)
 {
 	struct ocelot_port *ocelot_port = ocelot->ports[port];
+	u16 pvid = OCELOT_VLAN_UNAWARE_PVID;
 	u32 val = 0;
 
 	ocelot_port->pvid_vlan = pvid_vlan;
 
-	if (!ocelot_port->vlan_aware)
-		pvid_vlan.vid = 0;
+	if (ocelot_port->vlan_aware && pvid_vlan)
+		pvid = pvid_vlan->vid;
 
 	ocelot_rmw_gix(ocelot,
-		       ANA_PORT_VLAN_CFG_VLAN_VID(pvid_vlan.vid),
+		       ANA_PORT_VLAN_CFG_VLAN_VID(pvid),
 		       ANA_PORT_VLAN_CFG_VLAN_VID_M,
 		       ANA_PORT_VLAN_CFG, port);
 
@@ -212,7 +301,7 @@ static void ocelot_port_set_pvid(struct ocelot *ocelot, int port,
 	 * classified to VLAN 0, but that is always in our RX filter, so it
 	 * would get accepted were it not for this setting.
 	 */
-	if (!pvid_vlan.valid && ocelot_port->vlan_aware)
+	if (!pvid_vlan && ocelot_port->vlan_aware)
 		val = ANA_PORT_DROP_CFG_DROP_PRIO_S_TAGGED_ENA |
 		      ANA_PORT_DROP_CFG_DROP_PRIO_C_TAGGED_ENA;
 
@@ -222,31 +311,90 @@ static void ocelot_port_set_pvid(struct ocelot *ocelot, int port,
 		       ANA_PORT_DROP_CFG, port);
 }
 
-static int ocelot_vlan_member_set(struct ocelot *ocelot, u32 vlan_mask, u16 vid)
+static struct ocelot_bridge_vlan *ocelot_bridge_vlan_find(struct ocelot *ocelot,
+							  u16 vid)
 {
+	struct ocelot_bridge_vlan *vlan;
+
+	list_for_each_entry(vlan, &ocelot->vlans, list)
+		if (vlan->vid == vid)
+			return vlan;
+
+	return NULL;
+}
+
+static int ocelot_vlan_member_add(struct ocelot *ocelot, int port, u16 vid,
+				  bool untagged)
+{
+	struct ocelot_bridge_vlan *vlan = ocelot_bridge_vlan_find(ocelot, vid);
+	unsigned long portmask;
 	int err;
 
-	err = ocelot_vlant_set_mask(ocelot, vid, vlan_mask);
-	if (err)
+	if (vlan) {
+		portmask = vlan->portmask | BIT(port);
+
+		err = ocelot_vlant_set_mask(ocelot, vid, portmask);
+		if (err)
+			return err;
+
+		vlan->portmask = portmask;
+		/* Bridge VLANs can be overwritten with a different
+		 * egress-tagging setting, so make sure to override an untagged
+		 * with a tagged VID if that's going on.
+		 */
+		if (untagged)
+			vlan->untagged |= BIT(port);
+		else
+			vlan->untagged &= ~BIT(port);
+
+		return 0;
+	}
+
+	vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
+	if (!vlan)
+		return -ENOMEM;
+
+	portmask = BIT(port);
+
+	err = ocelot_vlant_set_mask(ocelot, vid, portmask);
+	if (err) {
+		kfree(vlan);
 		return err;
+	}
 
-	ocelot->vlan_mask[vid] = vlan_mask;
+	vlan->vid = vid;
+	vlan->portmask = portmask;
+	if (untagged)
+		vlan->untagged = BIT(port);
+	INIT_LIST_HEAD(&vlan->list);
+	list_add_tail(&vlan->list, &ocelot->vlans);
 
 	return 0;
 }
 
-static int ocelot_vlan_member_add(struct ocelot *ocelot, int port, u16 vid)
-{
-	return ocelot_vlan_member_set(ocelot,
-				      ocelot->vlan_mask[vid] | BIT(port),
-				      vid);
-}
-
 static int ocelot_vlan_member_del(struct ocelot *ocelot, int port, u16 vid)
 {
-	return ocelot_vlan_member_set(ocelot,
-				      ocelot->vlan_mask[vid] & ~BIT(port),
-				      vid);
+	struct ocelot_bridge_vlan *vlan = ocelot_bridge_vlan_find(ocelot, vid);
+	unsigned long portmask;
+	int err;
+
+	if (!vlan)
+		return 0;
+
+	portmask = vlan->portmask & ~BIT(port);
+
+	err = ocelot_vlant_set_mask(ocelot, vid, portmask);
+	if (err)
+		return err;
+
+	vlan->portmask = portmask;
+	if (vlan->portmask)
+		return 0;
+
+	list_del(&vlan->list);
+	kfree(vlan);
+
+	return 0;
 }
 
 int ocelot_port_vlan_filtering(struct ocelot *ocelot, int port,
@@ -279,7 +427,7 @@ int ocelot_port_vlan_filtering(struct ocelot *ocelot, int port,
 		       ANA_PORT_VLAN_CFG, port);
 
 	ocelot_port_set_pvid(ocelot, port, ocelot_port->pvid_vlan);
-	ocelot_port_set_native_vlan(ocelot, port, ocelot_port->native_vlan);
+	ocelot_port_manage_port_tag(ocelot, port);
 
 	return 0;
 }
@@ -288,14 +436,20 @@ EXPORT_SYMBOL(ocelot_port_vlan_filtering);
 int ocelot_vlan_prepare(struct ocelot *ocelot, int port, u16 vid, bool pvid,
 			bool untagged, struct netlink_ext_ack *extack)
 {
-	struct ocelot_port *ocelot_port = ocelot->ports[port];
-
-	/* Deny changing the native VLAN, but always permit deleting it */
-	if (untagged && ocelot_port->native_vlan.vid != vid &&
-	    ocelot_port->native_vlan.valid) {
-		NL_SET_ERR_MSG_MOD(extack,
-				   "Port already has a native VLAN");
-		return -EBUSY;
+	if (untagged) {
+		/* We are adding an egress-tagged VLAN */
+		if (ocelot_port_uses_native_vlan(ocelot, port)) {
+			NL_SET_ERR_MSG_MOD(extack,
+					   "Port with egress-tagged VLANs cannot have more than one egress-untagged (native) VLAN");
+			return -EBUSY;
+		}
+	} else {
+		/* We are adding an egress-tagged VLAN */
+		if (ocelot_port_num_untagged_vlans(ocelot, port) > 1) {
+			NL_SET_ERR_MSG_MOD(extack,
+					   "Port with more than one egress-untagged VLAN cannot have egress-tagged VLANs");
+			return -EBUSY;
+		}
 	}
 
 	return 0;
@@ -307,27 +461,17 @@ int ocelot_vlan_add(struct ocelot *ocelot, int port, u16 vid, bool pvid,
 {
 	int err;
 
-	err = ocelot_vlan_member_add(ocelot, port, vid);
+	err = ocelot_vlan_member_add(ocelot, port, vid, untagged);
 	if (err)
 		return err;
 
 	/* Default ingress vlan classification */
-	if (pvid) {
-		struct ocelot_vlan pvid_vlan;
-
-		pvid_vlan.vid = vid;
-		pvid_vlan.valid = true;
-		ocelot_port_set_pvid(ocelot, port, pvid_vlan);
-	}
+	if (pvid)
+		ocelot_port_set_pvid(ocelot, port,
+				     ocelot_bridge_vlan_find(ocelot, vid));
 
 	/* Untagged egress vlan clasification */
-	if (untagged) {
-		struct ocelot_vlan native_vlan;
-
-		native_vlan.vid = vid;
-		native_vlan.valid = true;
-		ocelot_port_set_native_vlan(ocelot, port, native_vlan);
-	}
+	ocelot_port_manage_port_tag(ocelot, port);
 
 	return 0;
 }
@@ -343,18 +487,11 @@ int ocelot_vlan_del(struct ocelot *ocelot, int port, u16 vid)
 		return err;
 
 	/* Ingress */
-	if (ocelot_port->pvid_vlan.vid == vid) {
-		struct ocelot_vlan pvid_vlan = {0};
-
-		ocelot_port_set_pvid(ocelot, port, pvid_vlan);
-	}
+	if (ocelot_port->pvid_vlan && ocelot_port->pvid_vlan->vid == vid)
+		ocelot_port_set_pvid(ocelot, port, NULL);
 
 	/* Egress */
-	if (ocelot_port->native_vlan.vid == vid) {
-		struct ocelot_vlan native_vlan = {0};
-
-		ocelot_port_set_native_vlan(ocelot, port, native_vlan);
-	}
+	ocelot_port_manage_port_tag(ocelot, port);
 
 	return 0;
 }
@@ -372,13 +509,13 @@ static void ocelot_vlan_init(struct ocelot *ocelot)
 
 	/* Configure the port VLAN memberships */
 	for (vid = 1; vid < VLAN_N_VID; vid++)
-		ocelot_vlan_member_set(ocelot, 0, vid);
+		ocelot_vlant_set_mask(ocelot, vid, 0);
 
 	/* Because VLAN filtering is enabled, we need VID 0 to get untagged
 	 * traffic.  It is added automatically if 8021q module is loaded, but
 	 * we can't rely on it since module may be not loaded.
 	 */
-	ocelot_vlan_member_set(ocelot, all_ports, 0);
+	ocelot_vlant_set_mask(ocelot, OCELOT_VLAN_UNAWARE_PVID, all_ports);
 
 	/* Set vlan ingress filter mask to all ports but the CPU port by
 	 * default.
@@ -951,7 +1088,7 @@ void ocelot_port_inject_frame(struct ocelot *ocelot, int port, int grp,
 	ocelot_ifh_set_bypass(ifh, 1);
 	ocelot_ifh_set_dest(ifh, BIT_ULL(port));
 	ocelot_ifh_set_tag_type(ifh, IFH_TAG_TYPE_C);
-	ocelot_ifh_set_vid(ifh, skb_vlan_tag_get(skb));
+	ocelot_ifh_set_vlan_tci(ifh, skb_vlan_tag_get(skb));
 	ocelot_ifh_set_rew_op(ifh, rew_op);
 
 	for (i = 0; i < OCELOT_TAG_LEN / 4; i++)
@@ -1053,6 +1190,7 @@ nla_put_failure:
 }
 EXPORT_SYMBOL(ocelot_port_fdb_do_dump);
 
+/* Caller must hold &ocelot->mact_lock */
 static int ocelot_mact_read(struct ocelot *ocelot, int port, int row, int col,
 			    struct ocelot_mact_entry *entry)
 {
@@ -1103,33 +1241,40 @@ static int ocelot_mact_read(struct ocelot *ocelot, int port, int row, int col,
 int ocelot_fdb_dump(struct ocelot *ocelot, int port,
 		    dsa_fdb_dump_cb_t *cb, void *data)
 {
+	int err = 0;
 	int i, j;
 
+	/* We could take the lock just around ocelot_mact_read, but doing so
+	 * thousands of times in a row seems rather pointless and inefficient.
+	 */
+	mutex_lock(&ocelot->mact_lock);
+
 	/* Loop through all the mac tables entries. */
 	for (i = 0; i < ocelot->num_mact_rows; i++) {
 		for (j = 0; j < 4; j++) {
 			struct ocelot_mact_entry entry;
 			bool is_static;
-			int ret;
 
-			ret = ocelot_mact_read(ocelot, port, i, j, &entry);
+			err = ocelot_mact_read(ocelot, port, i, j, &entry);
 			/* If the entry is invalid (wrong port, invalid...),
 			 * skip it.
 			 */
-			if (ret == -EINVAL)
+			if (err == -EINVAL)
 				continue;
-			else if (ret)
-				return ret;
+			else if (err)
+				break;
 
 			is_static = (entry.type == ENTRYTYPE_LOCKED);
 
-			ret = cb(entry.mac, entry.vid, is_static, data);
-			if (ret)
-				return ret;
+			err = cb(entry.mac, entry.vid, is_static, data);
+			if (err)
+				break;
 		}
 	}
 
-	return 0;
+	mutex_unlock(&ocelot->mact_lock);
+
+	return err;
 }
 EXPORT_SYMBOL(ocelot_fdb_dump);
 
@@ -1680,12 +1825,11 @@ void ocelot_port_bridge_leave(struct ocelot *ocelot, int port,
 			      struct net_device *bridge)
 {
 	struct ocelot_port *ocelot_port = ocelot->ports[port];
-	struct ocelot_vlan pvid = {0}, native_vlan = {0};
 
 	ocelot_port->bridge = NULL;
 
-	ocelot_port_set_pvid(ocelot, port, pvid);
-	ocelot_port_set_native_vlan(ocelot, port, native_vlan);
+	ocelot_port_set_pvid(ocelot, port, NULL);
+	ocelot_port_manage_port_tag(ocelot, port);
 	ocelot_apply_bridge_fwd_mask(ocelot);
 }
 EXPORT_SYMBOL(ocelot_port_bridge_leave);
@@ -2071,9 +2215,10 @@ static void ocelot_cpu_port_init(struct ocelot *ocelot)
 			    OCELOT_TAG_PREFIX_NONE);
 
 	/* Configure the CPU port to be VLAN aware */
-	ocelot_write_gix(ocelot, ANA_PORT_VLAN_CFG_VLAN_VID(0) |
-				 ANA_PORT_VLAN_CFG_VLAN_AWARE_ENA |
-				 ANA_PORT_VLAN_CFG_VLAN_POP_CNT(1),
+	ocelot_write_gix(ocelot,
+			 ANA_PORT_VLAN_CFG_VLAN_VID(OCELOT_VLAN_UNAWARE_PVID) |
+			 ANA_PORT_VLAN_CFG_VLAN_AWARE_ENA |
+			 ANA_PORT_VLAN_CFG_VLAN_POP_CNT(1),
 			 ANA_PORT_VLAN_CFG, cpu);
 }
 
@@ -2114,6 +2259,7 @@ int ocelot_init(struct ocelot *ocelot)
 
 	mutex_init(&ocelot->stats_lock);
 	mutex_init(&ocelot->ptp_lock);
+	mutex_init(&ocelot->mact_lock);
 	spin_lock_init(&ocelot->ptp_clock_lock);
 	spin_lock_init(&ocelot->ts_id_lock);
 	snprintf(queue_name, sizeof(queue_name), "%s-stats",
@@ -2130,6 +2276,7 @@ int ocelot_init(struct ocelot *ocelot)
 
 	INIT_LIST_HEAD(&ocelot->multicast);
 	INIT_LIST_HEAD(&ocelot->pgids);
+	INIT_LIST_HEAD(&ocelot->vlans);
 	ocelot_detect_features(ocelot);
 	ocelot_mact_init(ocelot);
 	ocelot_vlan_init(ocelot);