Merge branch 'mscc-ocelot-all-ports-vlan-untagged-egress'

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mscc/ocelot.c

@@ -162,48 +162,117 @@ 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 +281,7 @@ 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 +291,90 @@ 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 (vlan) {
+		portmask = vlan->portmask | BIT(port);
+
+		err = ocelot_vlant_set_mask(ocelot, vid, portmask);
 		if (err)
 			return err;
 
-	ocelot->vlan_mask[vid] = vlan_mask;
+		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;
-}
+	}
 
-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);
+	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;
+	}
+
+	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_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 +407,7 @@ 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;
 }
@@ -288,15 +416,21 @@ 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) {
+	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 already has a native VLAN");
+					   "Port with more than one egress-untagged VLAN cannot have egress-tagged VLANs");
 			return -EBUSY;
 		}
+	}
 
 	return 0;
 }
@@ -307,27 +441,17 @@ 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 +467,11 @@ 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 +489,13 @@ 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.
@@ -1680,12 +1797,11 @@ 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);
@@ -2071,7 +2187,8 @@ 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) |
+	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);
@@ -2130,6 +2247,7 @@ 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);

drivers/net/ethernet/mscc/ocelot.h

@@ -25,6 +25,7 @@
 #include "ocelot_rew.h"
 #include "ocelot_qs.h"
 
+#define OCELOT_VLAN_UNAWARE_PVID 0
 #define OCELOT_BUFFER_CELL_SZ 60
 
 #define OCELOT_STATS_CHECK_DELAY (2 * HZ)

drivers/net/ethernet/mscc/ocelot_mrp.c

@@ -116,16 +116,16 @@ static void ocelot_mrp_save_mac(struct ocelot *ocelot,
 				struct ocelot_port *port)
 {
 	ocelot_mact_learn(ocelot, PGID_BLACKHOLE, mrp_test_dmac,
-			  port->pvid_vlan.vid, ENTRYTYPE_LOCKED);
+			  OCELOT_VLAN_UNAWARE_PVID, ENTRYTYPE_LOCKED);
 	ocelot_mact_learn(ocelot, PGID_BLACKHOLE, mrp_control_dmac,
-			  port->pvid_vlan.vid, ENTRYTYPE_LOCKED);
+			  OCELOT_VLAN_UNAWARE_PVID, ENTRYTYPE_LOCKED);
 }
 
 static void ocelot_mrp_del_mac(struct ocelot *ocelot,
 			       struct ocelot_port *port)
 {
-	ocelot_mact_forget(ocelot, mrp_test_dmac, port->pvid_vlan.vid);
-	ocelot_mact_forget(ocelot, mrp_control_dmac, port->pvid_vlan.vid);
+	ocelot_mact_forget(ocelot, mrp_test_dmac, OCELOT_VLAN_UNAWARE_PVID);
+	ocelot_mact_forget(ocelot, mrp_control_dmac, OCELOT_VLAN_UNAWARE_PVID);
 }
 
 int ocelot_mrp_add(struct ocelot *ocelot, int port,

drivers/net/ethernet/mscc/ocelot_net.c

@@ -418,7 +418,7 @@ static int ocelot_vlan_vid_del(struct net_device *dev, u16 vid)
 	 * with VLAN filtering feature. We need to keep it to receive
 	 * untagged traffic.
 	 */
-	if (vid == 0)
+	if (vid == OCELOT_VLAN_UNAWARE_PVID)
 		return 0;
 
 	ret = ocelot_vlan_del(ocelot, port, vid);
@@ -553,7 +553,7 @@ static int ocelot_mc_unsync(struct net_device *dev, const unsigned char *addr)
 	struct ocelot_mact_work_ctx w;
 
 	ether_addr_copy(w.forget.addr, addr);
-	w.forget.vid = ocelot_port->pvid_vlan.vid;
+	w.forget.vid = OCELOT_VLAN_UNAWARE_PVID;
 	w.type = OCELOT_MACT_FORGET;
 
 	return ocelot_enqueue_mact_action(ocelot, &w);
@@ -567,7 +567,7 @@ static int ocelot_mc_sync(struct net_device *dev, const unsigned char *addr)
 	struct ocelot_mact_work_ctx w;
 
 	ether_addr_copy(w.learn.addr, addr);
-	w.learn.vid = ocelot_port->pvid_vlan.vid;
+	w.learn.vid = OCELOT_VLAN_UNAWARE_PVID;
 	w.learn.pgid = PGID_CPU;
 	w.learn.entry_type = ENTRYTYPE_LOCKED;
 	w.type = OCELOT_MACT_LEARN;
@@ -602,9 +602,9 @@ static int ocelot_port_set_mac_address(struct net_device *dev, void *p)
 
 	/* Learn the new net device MAC address in the mac table. */
 	ocelot_mact_learn(ocelot, PGID_CPU, addr->sa_data,
-			  ocelot_port->pvid_vlan.vid, ENTRYTYPE_LOCKED);
+			  OCELOT_VLAN_UNAWARE_PVID, ENTRYTYPE_LOCKED);
 	/* Then forget the previous one. */
-	ocelot_mact_forget(ocelot, dev->dev_addr, ocelot_port->pvid_vlan.vid);
+	ocelot_mact_forget(ocelot, dev->dev_addr, OCELOT_VLAN_UNAWARE_PVID);
 
 	eth_hw_addr_set(dev, addr->sa_data);
 	return 0;
@@ -1707,7 +1707,7 @@ int ocelot_probe_port(struct ocelot *ocelot, int port, struct regmap *target,
 
 	eth_hw_addr_gen(dev, ocelot->base_mac, port);
 	ocelot_mact_learn(ocelot, PGID_CPU, dev->dev_addr,
-			  ocelot_port->pvid_vlan.vid, ENTRYTYPE_LOCKED);
+			  OCELOT_VLAN_UNAWARE_PVID, ENTRYTYPE_LOCKED);
 
 	ocelot_init_port(ocelot, port);
 

include/soc/mscc/ocelot.h

@@ -563,9 +563,22 @@ struct ocelot_vcap_block {
 	int pol_lpr;
 };
 
-struct ocelot_vlan {
-	bool valid;
+struct ocelot_bridge_vlan {
 	u16 vid;
+	unsigned long portmask;
+	unsigned long untagged;
+	struct list_head list;
+};
+
+enum ocelot_port_tag_config {
+	/* all VLANs are egress-untagged */
+	OCELOT_PORT_TAG_DISABLED = 0,
+	/* all VLANs except the native VLAN and VID 0 are egress-tagged */
+	OCELOT_PORT_TAG_NATIVE = 1,
+	/* all VLANs except VID 0 are egress-tagged */
+	OCELOT_PORT_TAG_TRUNK_NO_VID0 = 2,
+	/* all VLANs are egress-tagged */
+	OCELOT_PORT_TAG_TRUNK = 3,
 };
 
 enum ocelot_sb {
@@ -590,9 +603,7 @@ struct ocelot_port {
 
 	bool				vlan_aware;
 	/* VLAN that untagged frames are classified to, on ingress */
-	struct ocelot_vlan		pvid_vlan;
-	/* The VLAN ID that will be transmitted as untagged, on egress */
-	struct ocelot_vlan		native_vlan;
+	const struct ocelot_bridge_vlan	*pvid_vlan;
 
 	unsigned int			ptp_skbs_in_flight;
 	u8				ptp_cmd;
@@ -635,8 +646,7 @@ struct ocelot {
 
 	u8				base_mac[ETH_ALEN];
 
-	/* Keep track of the vlan port masks */
-	u32				vlan_mask[VLAN_N_VID];
+	struct list_head		vlans;
 
 	/* Switches like VSC9959 have flooding per traffic class */
 	int				num_flooding_pgids;