--- /dev/null
+// 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);
+ }
+}
projects / kernel.git / commitdiff