Merge branch 'lan966x-extend-switchdev-and-mdb-support'

Horatiu Vultur says:

====================
net: lan966x: Extend switchdev with mdb support

This patch series extends lan966x with mdb support by implementing
the switchdev callbacks: SWITCHDEV_OBJ_ID_PORT_MDB and
SWITCHDEV_OBJ_ID_HOST_MDB.
It adds support for both ipv4/ipv6 entries and l2 entries.

v2->v3:
- rename PGID_FIRST and PGID_LAST to PGID_GP_START and PGID_GP_END
- don't forget and relearn an entry for the CPU if there are more
  references to the cpu.

v1->v2:
- rename lan966x_mac_learn_impl to __lan966x_mac_learn
- rename lan966x_mac_cpu_copy to lan966x_mac_ip_learn
- fix grammar and typos in comments and commit messages
- add reference counter for entries that copy frames to CPU
====================
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/microchip/lan966x/Makefile

@@ -7,4 +7,4 @@ obj-$(CONFIG_LAN966X_SWITCH) += lan966x-switch.o
 
 lan966x-switch-objs  := lan966x_main.o lan966x_phylink.o lan966x_port.o \
 			lan966x_mac.o lan966x_ethtool.o lan966x_switchdev.o \
-			lan966x_vlan.o lan966x_fdb.o
+			lan966x_vlan.o lan966x_fdb.o lan966x_mdb.o

drivers/net/ethernet/microchip/lan966x/lan966x_mac.c

@@ -68,7 +68,8 @@ static void lan966x_mac_select(struct lan966x *lan966x,
 	lan_wr(mach, lan966x, ANA_MACHDATA);
 }
 
-int lan966x_mac_learn(struct lan966x *lan966x, int port,
+static int __lan966x_mac_learn(struct lan966x *lan966x, int pgid,
+			       bool cpu_copy,
 			       const unsigned char mac[ETH_ALEN],
 			       unsigned int vid,
 			       enum macaccess_entry_type type)
@@ -78,7 +79,8 @@ int lan966x_mac_learn(struct lan966x *lan966x, int port,
 	/* Issue a write command */
 	lan_wr(ANA_MACACCESS_VALID_SET(1) |
 	       ANA_MACACCESS_CHANGE2SW_SET(0) |
-	       ANA_MACACCESS_DEST_IDX_SET(port) |
+	       ANA_MACACCESS_MAC_CPU_COPY_SET(cpu_copy) |
+	       ANA_MACACCESS_DEST_IDX_SET(pgid) |
 	       ANA_MACACCESS_ENTRYTYPE_SET(type) |
 	       ANA_MACACCESS_MAC_TABLE_CMD_SET(MACACCESS_CMD_LEARN),
 	       lan966x, ANA_MACACCESS);
@@ -86,6 +88,30 @@ int lan966x_mac_learn(struct lan966x *lan966x, int port,
 	return lan966x_mac_wait_for_completion(lan966x);
 }
 
+/* The mask of the front ports is encoded inside the mac parameter via a call
+ * to lan966x_mdb_encode_mac().
+ */
+int lan966x_mac_ip_learn(struct lan966x *lan966x,
+			 bool cpu_copy,
+			 const unsigned char mac[ETH_ALEN],
+			 unsigned int vid,
+			 enum macaccess_entry_type type)
+{
+	WARN_ON(type != ENTRYTYPE_MACV4 && type != ENTRYTYPE_MACV6);
+
+	return __lan966x_mac_learn(lan966x, 0, cpu_copy, mac, vid, type);
+}
+
+int lan966x_mac_learn(struct lan966x *lan966x, int port,
+		      const unsigned char mac[ETH_ALEN],
+		      unsigned int vid,
+		      enum macaccess_entry_type type)
+{
+	WARN_ON(type != ENTRYTYPE_NORMAL && type != ENTRYTYPE_LOCKED);
+
+	return __lan966x_mac_learn(lan966x, port, false, mac, vid, type);
+}
+
 int lan966x_mac_forget(struct lan966x *lan966x,
 		       const unsigned char mac[ETH_ALEN],
 		       unsigned int vid,

drivers/net/ethernet/microchip/lan966x/lan966x_main.c

@@ -926,6 +926,7 @@ static int lan966x_probe(struct platform_device *pdev)
 		lan966x_port_init(lan966x->ports[p]);
 	}
 
+	lan966x_mdb_init(lan966x);
 	err = lan966x_fdb_init(lan966x);
 	if (err)
 		goto cleanup_ports;
@@ -955,6 +956,7 @@ static int lan966x_remove(struct platform_device *pdev)
 	mutex_destroy(&lan966x->stats_lock);
 
 	lan966x_mac_purge_entries(lan966x);
+	lan966x_mdb_deinit(lan966x);
 	lan966x_fdb_deinit(lan966x);
 
 	return 0;

drivers/net/ethernet/microchip/lan966x/lan966x_main.h

@@ -30,6 +30,8 @@
 /* Reserved amount for (SRC, PRIO) at index 8*SRC + PRIO */
 #define QSYS_Q_RSRV			95
 
+#define CPU_PORT			8
+
 /* Reserved PGIDs */
 #define PGID_CPU			(PGID_AGGR - 6)
 #define PGID_UC				(PGID_AGGR - 5)
@@ -38,14 +40,16 @@
 #define PGID_MCIPV4			(PGID_AGGR - 2)
 #define PGID_MCIPV6			(PGID_AGGR - 1)
 
+/* Non-reserved PGIDs, used for general purpose */
+#define PGID_GP_START			(CPU_PORT + 1)
+#define PGID_GP_END			PGID_CPU
+
 #define LAN966X_SPEED_NONE		0
 #define LAN966X_SPEED_2500		1
 #define LAN966X_SPEED_1000		1
 #define LAN966X_SPEED_100		2
 #define LAN966X_SPEED_10		3
 
-#define CPU_PORT			8
-
 /* MAC table entry types.
  * ENTRYTYPE_NORMAL is subject to aging.
  * ENTRYTYPE_LOCKED is not subject to aging.
@@ -105,6 +109,10 @@ struct lan966x {
 	/* worqueue for fdb */
 	struct workqueue_struct *fdb_work;
 	struct list_head fdb_entries;
+
+	/* mdb */
+	struct list_head mdb_entries;
+	struct list_head pgid_entries;
 };
 
 struct lan966x_port_config {
@@ -157,6 +165,11 @@ int lan966x_port_pcs_set(struct lan966x_port *port,
 			 struct lan966x_port_config *config);
 void lan966x_port_init(struct lan966x_port *port);
 
+int lan966x_mac_ip_learn(struct lan966x *lan966x,
+			 bool cpu_copy,
+			 const unsigned char mac[ETH_ALEN],
+			 unsigned int vid,
+			 enum macaccess_entry_type type);
 int lan966x_mac_learn(struct lan966x *lan966x, int port,
 		      const unsigned char mac[ETH_ALEN],
 		      unsigned int vid,
@@ -206,6 +219,15 @@ int lan966x_handle_fdb(struct net_device *dev,
 		       unsigned long event, const void *ctx,
 		       const struct switchdev_notifier_fdb_info *fdb_info);
 
+void lan966x_mdb_init(struct lan966x *lan966x);
+void lan966x_mdb_deinit(struct lan966x *lan966x);
+int lan966x_handle_port_mdb_add(struct lan966x_port *port,
+				const struct switchdev_obj *obj);
+int lan966x_handle_port_mdb_del(struct lan966x_port *port,
+				const struct switchdev_obj *obj);
+void lan966x_mdb_erase_entries(struct lan966x *lan966x, u16 vid);
+void lan966x_mdb_write_entries(struct lan966x *lan966x, u16 vid);
+
 static inline void __iomem *lan_addr(void __iomem *base[],
 				     int id, int tinst, int tcnt,
 				     int gbase, int ginst,

drivers/net/ethernet/microchip/lan966x/lan966x_mdb.c

+// SPDX-License-Identifier: GPL-2.0+
+
+#include <net/switchdev.h>
+
+#include "lan966x_main.h"
+
+struct lan966x_pgid_entry {
+	struct list_head list;
+	int index;
+	refcount_t refcount;
+	u16 ports;
+};
+
+struct lan966x_mdb_entry {
+	struct list_head list;
+	unsigned char mac[ETH_ALEN];
+	u16 vid;
+	u16 ports;
+	struct lan966x_pgid_entry *pgid;
+	u8 cpu_copy;
+};
+
+void lan966x_mdb_init(struct lan966x *lan966x)
+{
+	INIT_LIST_HEAD(&lan966x->mdb_entries);
+	INIT_LIST_HEAD(&lan966x->pgid_entries);
+}
+
+static void lan966x_mdb_purge_mdb_entries(struct lan966x *lan966x)
+{
+	struct lan966x_mdb_entry *mdb_entry, *tmp;
+
+	list_for_each_entry_safe(mdb_entry, tmp, &lan966x->mdb_entries, list) {
+		list_del(&mdb_entry->list);
+		kfree(mdb_entry);
+	}
+}
+
+static void lan966x_mdb_purge_pgid_entries(struct lan966x *lan966x)
+{
+	struct lan966x_pgid_entry *pgid_entry, *tmp;
+
+	list_for_each_entry_safe(pgid_entry, tmp, &lan966x->pgid_entries, list) {
+		list_del(&pgid_entry->list);
+		kfree(pgid_entry);
+	}
+}
+
+void lan966x_mdb_deinit(struct lan966x *lan966x)
+{
+	lan966x_mdb_purge_mdb_entries(lan966x);
+	lan966x_mdb_purge_pgid_entries(lan966x);
+}
+
+static struct lan966x_mdb_entry *
+lan966x_mdb_entry_get(struct lan966x *lan966x,
+		      const unsigned char *mac,
+		      u16 vid)
+{
+	struct lan966x_mdb_entry *mdb_entry;
+
+	list_for_each_entry(mdb_entry, &lan966x->mdb_entries, list) {
+		if (ether_addr_equal(mdb_entry->mac, mac) &&
+		    mdb_entry->vid == vid)
+			return mdb_entry;
+	}
+
+	return NULL;
+}
+
+static struct lan966x_mdb_entry *
+lan966x_mdb_entry_add(struct lan966x *lan966x,
+		      const struct switchdev_obj_port_mdb *mdb)
+{
+	struct lan966x_mdb_entry *mdb_entry;
+
+	mdb_entry = kzalloc(sizeof(*mdb_entry), GFP_KERNEL);
+	if (!mdb_entry)
+		return ERR_PTR(-ENOMEM);
+
+	ether_addr_copy(mdb_entry->mac, mdb->addr);
+	mdb_entry->vid = mdb->vid;
+
+	list_add_tail(&mdb_entry->list, &lan966x->mdb_entries);
+
+	return mdb_entry;
+}
+
+static void lan966x_mdb_encode_mac(unsigned char *mac,
+				   struct lan966x_mdb_entry *mdb_entry,
+				   enum macaccess_entry_type type)
+{
+	ether_addr_copy(mac, mdb_entry->mac);
+
+	if (type == ENTRYTYPE_MACV4) {
+		mac[0] = 0;
+		mac[1] = mdb_entry->ports >> 8;
+		mac[2] = mdb_entry->ports & 0xff;
+	} else if (type == ENTRYTYPE_MACV6) {
+		mac[0] = mdb_entry->ports >> 8;
+		mac[1] = mdb_entry->ports & 0xff;
+	}
+}
+
+static int lan966x_mdb_ip_add(struct lan966x_port *port,
+			      const struct switchdev_obj_port_mdb *mdb,
+			      enum macaccess_entry_type type)
+{
+	bool cpu_port = netif_is_bridge_master(mdb->obj.orig_dev);
+	struct lan966x *lan966x = port->lan966x;
+	struct lan966x_mdb_entry *mdb_entry;
+	unsigned char mac[ETH_ALEN];
+	bool cpu_copy = false;
+
+	mdb_entry = lan966x_mdb_entry_get(lan966x, mdb->addr, mdb->vid);
+	if (!mdb_entry) {
+		mdb_entry = lan966x_mdb_entry_add(lan966x, mdb);
+		if (IS_ERR(mdb_entry))
+			return PTR_ERR(mdb_entry);
+	} else {
+		lan966x_mdb_encode_mac(mac, mdb_entry, type);
+		lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
+	}
+
+	if (cpu_port)
+		mdb_entry->cpu_copy++;
+	else
+		mdb_entry->ports |= BIT(port->chip_port);
+
+	/* Copy the frame to CPU only if the CPU is in the VLAN */
+	if (lan966x_vlan_cpu_member_cpu_vlan_mask(lan966x, mdb_entry->vid) &&
+	    mdb_entry->cpu_copy)
+		cpu_copy = true;
+
+	lan966x_mdb_encode_mac(mac, mdb_entry, type);
+	return lan966x_mac_ip_learn(lan966x, cpu_copy,
+				    mac, mdb_entry->vid, type);
+}
+
+static int lan966x_mdb_ip_del(struct lan966x_port *port,
+			      const struct switchdev_obj_port_mdb *mdb,
+			      enum macaccess_entry_type type)
+{
+	bool cpu_port = netif_is_bridge_master(mdb->obj.orig_dev);
+	struct lan966x *lan966x = port->lan966x;
+	struct lan966x_mdb_entry *mdb_entry;
+	unsigned char mac[ETH_ALEN];
+	u16 ports;
+
+	mdb_entry = lan966x_mdb_entry_get(lan966x, mdb->addr, mdb->vid);
+	if (!mdb_entry)
+		return -ENOENT;
+
+	ports = mdb_entry->ports;
+	if (cpu_port) {
+		/* If there are still other references to the CPU port then
+		 * there is no point to delete and add again the same entry
+		 */
+		mdb_entry->cpu_copy--;
+		if (mdb_entry->cpu_copy)
+			return 0;
+	} else {
+		ports &= ~BIT(port->chip_port);
+	}
+
+	lan966x_mdb_encode_mac(mac, mdb_entry, type);
+	lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
+
+	mdb_entry->ports = ports;
+
+	if (!mdb_entry->ports && !mdb_entry->cpu_copy) {
+		list_del(&mdb_entry->list);
+		kfree(mdb_entry);
+		return 0;
+	}
+
+	lan966x_mdb_encode_mac(mac, mdb_entry, type);
+	return lan966x_mac_ip_learn(lan966x, mdb_entry->cpu_copy,
+				    mac, mdb_entry->vid, type);
+}
+
+static struct lan966x_pgid_entry *
+lan966x_pgid_entry_add(struct lan966x *lan966x, int index, u16 ports)
+{
+	struct lan966x_pgid_entry *pgid_entry;
+
+	pgid_entry = kzalloc(sizeof(*pgid_entry), GFP_KERNEL);
+	if (!pgid_entry)
+		return ERR_PTR(-ENOMEM);
+
+	pgid_entry->ports = ports;
+	pgid_entry->index = index;
+	refcount_set(&pgid_entry->refcount, 1);
+
+	list_add_tail(&pgid_entry->list, &lan966x->pgid_entries);
+
+	return pgid_entry;
+}
+
+static struct lan966x_pgid_entry *
+lan966x_pgid_entry_get(struct lan966x *lan966x,
+		       struct lan966x_mdb_entry *mdb_entry)
+{
+	struct lan966x_pgid_entry *pgid_entry;
+	int index;
+
+	/* Try to find an existing pgid that uses the same ports as the
+	 * mdb_entry
+	 */
+	list_for_each_entry(pgid_entry, &lan966x->pgid_entries, list) {
+		if (pgid_entry->ports == mdb_entry->ports) {
+			refcount_inc(&pgid_entry->refcount);
+			return pgid_entry;
+		}
+	}
+
+	/* Try to find an empty pgid entry and allocate one in case it finds it,
+	 * otherwise it means that there are no more resources
+	 */
+	for (index = PGID_GP_START; index < PGID_GP_END; index++) {
+		bool used = false;
+
+		list_for_each_entry(pgid_entry, &lan966x->pgid_entries, list) {
+			if (pgid_entry->index == index) {
+				used = true;
+				break;
+			}
+		}
+
+		if (!used)
+			return lan966x_pgid_entry_add(lan966x, index,
+						      mdb_entry->ports);
+	}
+
+	return ERR_PTR(-ENOSPC);
+}
+
+static void lan966x_pgid_entry_del(struct lan966x *lan966x,
+				   struct lan966x_pgid_entry *pgid_entry)
+{
+	if (!refcount_dec_and_test(&pgid_entry->refcount))
+		return;
+
+	list_del(&pgid_entry->list);
+	kfree(pgid_entry);
+}
+
+static int lan966x_mdb_l2_add(struct lan966x_port *port,
+			      const struct switchdev_obj_port_mdb *mdb,
+			      enum macaccess_entry_type type)
+{
+	bool cpu_port = netif_is_bridge_master(mdb->obj.orig_dev);
+	struct lan966x *lan966x = port->lan966x;
+	struct lan966x_pgid_entry *pgid_entry;
+	struct lan966x_mdb_entry *mdb_entry;
+	unsigned char mac[ETH_ALEN];
+
+	mdb_entry = lan966x_mdb_entry_get(lan966x, mdb->addr, mdb->vid);
+	if (!mdb_entry) {
+		mdb_entry = lan966x_mdb_entry_add(lan966x, mdb);
+		if (IS_ERR(mdb_entry))
+			return PTR_ERR(mdb_entry);
+	} else {
+		lan966x_pgid_entry_del(lan966x, mdb_entry->pgid);
+		lan966x_mdb_encode_mac(mac, mdb_entry, type);
+		lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
+	}
+
+	if (cpu_port) {
+		mdb_entry->ports |= BIT(CPU_PORT);
+		mdb_entry->cpu_copy++;
+	} else {
+		mdb_entry->ports |= BIT(port->chip_port);
+	}
+
+	pgid_entry = lan966x_pgid_entry_get(lan966x, mdb_entry);
+	if (IS_ERR(pgid_entry)) {
+		list_del(&mdb_entry->list);
+		kfree(mdb_entry);
+		return PTR_ERR(pgid_entry);
+	}
+	mdb_entry->pgid = pgid_entry;
+
+	/* Copy the frame to CPU only if the CPU is in the VLAN */
+	if (!lan966x_vlan_cpu_member_cpu_vlan_mask(lan966x, mdb_entry->vid) &&
+	    mdb_entry->cpu_copy)
+		mdb_entry->ports &= BIT(CPU_PORT);
+
+	lan_rmw(ANA_PGID_PGID_SET(mdb_entry->ports),
+		ANA_PGID_PGID,
+		lan966x, ANA_PGID(pgid_entry->index));
+
+	return lan966x_mac_learn(lan966x, pgid_entry->index, mdb_entry->mac,
+				 mdb_entry->vid, type);
+}
+
+static int lan966x_mdb_l2_del(struct lan966x_port *port,
+			      const struct switchdev_obj_port_mdb *mdb,
+			      enum macaccess_entry_type type)
+{
+	bool cpu_port = netif_is_bridge_master(mdb->obj.orig_dev);
+	struct lan966x *lan966x = port->lan966x;
+	struct lan966x_pgid_entry *pgid_entry;
+	struct lan966x_mdb_entry *mdb_entry;
+	unsigned char mac[ETH_ALEN];
+	u16 ports;
+
+	mdb_entry = lan966x_mdb_entry_get(lan966x, mdb->addr, mdb->vid);
+	if (!mdb_entry)
+		return -ENOENT;
+
+	ports = mdb_entry->ports;
+	if (cpu_port) {
+		/* If there are still other references to the CPU port then
+		 * there is no point to delete and add again the same entry
+		 */
+		mdb_entry->cpu_copy--;
+		if (mdb_entry->cpu_copy)
+			return 0;
+
+		ports &= ~BIT(CPU_PORT);
+	} else {
+		ports &= ~BIT(port->chip_port);
+	}
+
+	lan966x_mdb_encode_mac(mac, mdb_entry, type);
+	lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
+	lan966x_pgid_entry_del(lan966x, mdb_entry->pgid);
+
+	mdb_entry->ports = ports;
+
+	if (!mdb_entry->ports) {
+		list_del(&mdb_entry->list);
+		kfree(mdb_entry);
+		return 0;
+	}
+
+	pgid_entry = lan966x_pgid_entry_get(lan966x, mdb_entry);
+	if (IS_ERR(pgid_entry)) {
+		list_del(&mdb_entry->list);
+		kfree(mdb_entry);
+		return PTR_ERR(pgid_entry);
+	}
+	mdb_entry->pgid = pgid_entry;
+
+	lan_rmw(ANA_PGID_PGID_SET(mdb_entry->ports),
+		ANA_PGID_PGID,
+		lan966x, ANA_PGID(pgid_entry->index));
+
+	return lan966x_mac_learn(lan966x, pgid_entry->index, mdb_entry->mac,
+				 mdb_entry->vid, type);
+}
+
+static enum macaccess_entry_type
+lan966x_mdb_classify(const unsigned char *mac)
+{
+	if (mac[0] == 0x01 && mac[1] == 0x00 && mac[2] == 0x5e)
+		return ENTRYTYPE_MACV4;
+	if (mac[0] == 0x33 && mac[1] == 0x33)
+		return ENTRYTYPE_MACV6;
+	return ENTRYTYPE_LOCKED;
+}
+
+int lan966x_handle_port_mdb_add(struct lan966x_port *port,
+				const struct switchdev_obj *obj)
+{
+	const struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
+	enum macaccess_entry_type type;
+
+	/* Split the way the entries are added for ipv4/ipv6 and for l2. The
+	 * reason is that for ipv4/ipv6 it doesn't require to use any pgid
+	 * entry, while for l2 is required to use pgid entries
+	 */
+	type = lan966x_mdb_classify(mdb->addr);
+	if (type == ENTRYTYPE_MACV4 || type == ENTRYTYPE_MACV6)
+		return lan966x_mdb_ip_add(port, mdb, type);
+
+	return lan966x_mdb_l2_add(port, mdb, type);
+}
+
+int lan966x_handle_port_mdb_del(struct lan966x_port *port,
+				const struct switchdev_obj *obj)
+{
+	const struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
+	enum macaccess_entry_type type;
+
+	/* Split the way the entries are removed for ipv4/ipv6 and for l2. The
+	 * reason is that for ipv4/ipv6 it doesn't require to use any pgid
+	 * entry, while for l2 is required to use pgid entries
+	 */
+	type = lan966x_mdb_classify(mdb->addr);
+	if (type == ENTRYTYPE_MACV4 || type == ENTRYTYPE_MACV6)
+		return lan966x_mdb_ip_del(port, mdb, type);
+
+	return lan966x_mdb_l2_del(port, mdb, type);
+}
+
+static void lan966x_mdb_ip_cpu_copy(struct lan966x *lan966x,
+				    struct lan966x_mdb_entry *mdb_entry,
+				    enum macaccess_entry_type type)
+{
+	unsigned char mac[ETH_ALEN];
+
+	lan966x_mdb_encode_mac(mac, mdb_entry, type);
+	lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
+	lan966x_mac_ip_learn(lan966x, true, mac, mdb_entry->vid, type);
+}
+
+static void lan966x_mdb_l2_cpu_copy(struct lan966x *lan966x,
+				    struct lan966x_mdb_entry *mdb_entry,
+				    enum macaccess_entry_type type)
+{
+	struct lan966x_pgid_entry *pgid_entry;
+	unsigned char mac[ETH_ALEN];
+
+	lan966x_pgid_entry_del(lan966x, mdb_entry->pgid);
+	lan966x_mdb_encode_mac(mac, mdb_entry, type);
+	lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
+
+	mdb_entry->ports |= BIT(CPU_PORT);
+
+	pgid_entry = lan966x_pgid_entry_get(lan966x, mdb_entry);
+	if (IS_ERR(pgid_entry))
+		return;
+
+	mdb_entry->pgid = pgid_entry;
+
+	lan_rmw(ANA_PGID_PGID_SET(mdb_entry->ports),
+		ANA_PGID_PGID,
+		lan966x, ANA_PGID(pgid_entry->index));
+
+	lan966x_mac_learn(lan966x, pgid_entry->index, mdb_entry->mac,
+			  mdb_entry->vid, type);
+}
+
+void lan966x_mdb_write_entries(struct lan966x *lan966x, u16 vid)
+{
+	struct lan966x_mdb_entry *mdb_entry;
+	enum macaccess_entry_type type;
+
+	list_for_each_entry(mdb_entry, &lan966x->mdb_entries, list) {
+		if (mdb_entry->vid != vid || !mdb_entry->cpu_copy)
+			continue;
+
+		type = lan966x_mdb_classify(mdb_entry->mac);
+		if (type == ENTRYTYPE_MACV4 || type == ENTRYTYPE_MACV6)
+			lan966x_mdb_ip_cpu_copy(lan966x, mdb_entry, type);
+		else
+			lan966x_mdb_l2_cpu_copy(lan966x, mdb_entry, type);
+	}
+}
+
+static void lan966x_mdb_ip_cpu_remove(struct lan966x *lan966x,
+				      struct lan966x_mdb_entry *mdb_entry,
+				      enum macaccess_entry_type type)
+{
+	unsigned char mac[ETH_ALEN];
+
+	lan966x_mdb_encode_mac(mac, mdb_entry, type);
+	lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
+	lan966x_mac_ip_learn(lan966x, false, mac, mdb_entry->vid, type);
+}
+
+static void lan966x_mdb_l2_cpu_remove(struct lan966x *lan966x,
+				      struct lan966x_mdb_entry *mdb_entry,
+				      enum macaccess_entry_type type)
+{
+	struct lan966x_pgid_entry *pgid_entry;
+	unsigned char mac[ETH_ALEN];
+
+	lan966x_pgid_entry_del(lan966x, mdb_entry->pgid);
+	lan966x_mdb_encode_mac(mac, mdb_entry, type);
+	lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
+
+	mdb_entry->ports &= ~BIT(CPU_PORT);
+
+	pgid_entry = lan966x_pgid_entry_get(lan966x, mdb_entry);
+	if (IS_ERR(pgid_entry))
+		return;
+
+	mdb_entry->pgid = pgid_entry;
+
+	lan_rmw(ANA_PGID_PGID_SET(mdb_entry->ports),
+		ANA_PGID_PGID,
+		lan966x, ANA_PGID(pgid_entry->index));
+
+	lan966x_mac_learn(lan966x, pgid_entry->index, mdb_entry->mac,
+			  mdb_entry->vid, type);
+}
+
+void lan966x_mdb_erase_entries(struct lan966x *lan966x, u16 vid)
+{
+	struct lan966x_mdb_entry *mdb_entry;
+	enum macaccess_entry_type type;
+
+	list_for_each_entry(mdb_entry, &lan966x->mdb_entries, list) {
+		if (mdb_entry->vid != vid || !mdb_entry->cpu_copy)
+			continue;
+
+		type = lan966x_mdb_classify(mdb_entry->mac);
+		if (type == ENTRYTYPE_MACV4 || type == ENTRYTYPE_MACV6)
+			lan966x_mdb_ip_cpu_remove(lan966x, mdb_entry, type);
+		else
+			lan966x_mdb_l2_cpu_remove(lan966x, mdb_entry, type);
+	}
+}

drivers/net/ethernet/microchip/lan966x/lan966x_regs.h

@@ -169,6 +169,12 @@ enum lan966x_target {
 #define ANA_MACACCESS_CHANGE2SW_GET(x)\
 	FIELD_GET(ANA_MACACCESS_CHANGE2SW, x)
 
+#define ANA_MACACCESS_MAC_CPU_COPY               BIT(16)
+#define ANA_MACACCESS_MAC_CPU_COPY_SET(x)\
+	FIELD_PREP(ANA_MACACCESS_MAC_CPU_COPY, x)
+#define ANA_MACACCESS_MAC_CPU_COPY_GET(x)\
+	FIELD_GET(ANA_MACACCESS_MAC_CPU_COPY, x)
+
 #define ANA_MACACCESS_VALID                      BIT(12)
 #define ANA_MACACCESS_VALID_SET(x)\
 	FIELD_PREP(ANA_MACACCESS_VALID, x)

drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c

@@ -438,6 +438,10 @@ static int lan966x_handle_port_obj_add(struct net_device *dev, const void *ctx,
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		err = lan966x_handle_port_vlan_add(port, obj);
 		break;
+	case SWITCHDEV_OBJ_ID_PORT_MDB:
+	case SWITCHDEV_OBJ_ID_HOST_MDB:
+		err = lan966x_handle_port_mdb_add(port, obj);
+		break;
 	default:
 		err = -EOPNOTSUPP;
 		break;
@@ -473,6 +477,10 @@ static int lan966x_handle_port_obj_del(struct net_device *dev, const void *ctx,
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		err = lan966x_handle_port_vlan_del(port, obj);
 		break;
+	case SWITCHDEV_OBJ_ID_PORT_MDB:
+	case SWITCHDEV_OBJ_ID_HOST_MDB:
+		err = lan966x_handle_port_mdb_del(port, obj);
+		break;
 	default:
 		err = -EOPNOTSUPP;
 		break;

drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c

@@ -219,6 +219,7 @@ void lan966x_vlan_port_add_vlan(struct lan966x_port *port,
 	if (lan966x_vlan_cpu_member_cpu_vlan_mask(lan966x, vid)) {
 		lan966x_vlan_cpu_add_vlan_mask(lan966x, vid);
 		lan966x_fdb_write_entries(lan966x, vid);
+		lan966x_mdb_write_entries(lan966x, vid);
 	}
 
 	lan966x_vlan_port_set_vid(port, vid, pvid, untagged);
@@ -241,6 +242,7 @@ void lan966x_vlan_port_del_vlan(struct lan966x_port *port, u16 vid)
 	if (!lan966x_vlan_port_any_vlan_mask(lan966x, vid)) {
 		lan966x_vlan_cpu_del_vlan_mask(lan966x, vid);
 		lan966x_fdb_erase_entries(lan966x, vid);
+		lan966x_mdb_erase_entries(lan966x, vid);
 	}
 }
 
@@ -254,8 +256,10 @@ void lan966x_vlan_cpu_add_vlan(struct lan966x *lan966x, u16 vid)
 	 * information so when a front port is added then it would add also the
 	 * CPU port.
 	 */
-	if (lan966x_vlan_port_any_vlan_mask(lan966x, vid))
+	if (lan966x_vlan_port_any_vlan_mask(lan966x, vid)) {
 		lan966x_vlan_cpu_add_vlan_mask(lan966x, vid);
+		lan966x_mdb_write_entries(lan966x, vid);
+	}
 
 	lan966x_vlan_cpu_add_cpu_vlan_mask(lan966x, vid);
 	lan966x_fdb_write_entries(lan966x, vid);
@@ -267,6 +271,7 @@ void lan966x_vlan_cpu_del_vlan(struct lan966x *lan966x, u16 vid)
 	lan966x_vlan_cpu_del_cpu_vlan_mask(lan966x, vid);
 	lan966x_vlan_cpu_del_vlan_mask(lan966x, vid);
 	lan966x_fdb_erase_entries(lan966x, vid);
+	lan966x_mdb_erase_entries(lan966x, vid);
 }
 
 void lan966x_vlan_init(struct lan966x *lan966x)