552 lines
15 KiB
C
552 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include <net/switchdev.h>
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#include "lan966x_main.h"
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struct lan966x_pgid_entry {
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struct list_head list;
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int index;
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refcount_t refcount;
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u16 ports;
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};
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struct lan966x_mdb_entry {
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struct list_head list;
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unsigned char mac[ETH_ALEN];
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u16 vid;
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u16 ports;
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struct lan966x_pgid_entry *pgid;
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u8 cpu_copy;
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};
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void lan966x_mdb_init(struct lan966x *lan966x)
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{
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INIT_LIST_HEAD(&lan966x->mdb_entries);
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INIT_LIST_HEAD(&lan966x->pgid_entries);
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}
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static void lan966x_mdb_purge_mdb_entries(struct lan966x *lan966x)
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{
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struct lan966x_mdb_entry *mdb_entry, *tmp;
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list_for_each_entry_safe(mdb_entry, tmp, &lan966x->mdb_entries, list) {
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list_del(&mdb_entry->list);
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kfree(mdb_entry);
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}
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}
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static void lan966x_mdb_purge_pgid_entries(struct lan966x *lan966x)
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{
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struct lan966x_pgid_entry *pgid_entry, *tmp;
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list_for_each_entry_safe(pgid_entry, tmp, &lan966x->pgid_entries, list) {
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list_del(&pgid_entry->list);
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kfree(pgid_entry);
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}
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}
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void lan966x_mdb_deinit(struct lan966x *lan966x)
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{
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lan966x_mdb_purge_mdb_entries(lan966x);
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lan966x_mdb_purge_pgid_entries(lan966x);
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}
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static struct lan966x_mdb_entry *
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lan966x_mdb_entry_get(struct lan966x *lan966x,
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const unsigned char *mac,
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u16 vid)
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{
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struct lan966x_mdb_entry *mdb_entry;
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list_for_each_entry(mdb_entry, &lan966x->mdb_entries, list) {
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if (ether_addr_equal(mdb_entry->mac, mac) &&
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mdb_entry->vid == vid)
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return mdb_entry;
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}
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return NULL;
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}
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static struct lan966x_mdb_entry *
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lan966x_mdb_entry_add(struct lan966x *lan966x,
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const struct switchdev_obj_port_mdb *mdb)
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{
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struct lan966x_mdb_entry *mdb_entry;
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mdb_entry = kzalloc(sizeof(*mdb_entry), GFP_KERNEL);
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if (!mdb_entry)
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return ERR_PTR(-ENOMEM);
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ether_addr_copy(mdb_entry->mac, mdb->addr);
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mdb_entry->vid = mdb->vid;
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list_add_tail(&mdb_entry->list, &lan966x->mdb_entries);
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return mdb_entry;
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}
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static void lan966x_mdb_encode_mac(unsigned char *mac,
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struct lan966x_mdb_entry *mdb_entry,
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enum macaccess_entry_type type)
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{
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ether_addr_copy(mac, mdb_entry->mac);
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if (type == ENTRYTYPE_MACV4) {
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mac[0] = 0;
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mac[1] = mdb_entry->ports >> 8;
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mac[2] = mdb_entry->ports & 0xff;
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} else if (type == ENTRYTYPE_MACV6) {
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mac[0] = mdb_entry->ports >> 8;
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mac[1] = mdb_entry->ports & 0xff;
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}
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}
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static int lan966x_mdb_ip_add(struct lan966x_port *port,
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const struct switchdev_obj_port_mdb *mdb,
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enum macaccess_entry_type type)
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{
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bool cpu_port = netif_is_bridge_master(mdb->obj.orig_dev);
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struct lan966x *lan966x = port->lan966x;
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struct lan966x_mdb_entry *mdb_entry;
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unsigned char mac[ETH_ALEN];
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bool cpu_copy = false;
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mdb_entry = lan966x_mdb_entry_get(lan966x, mdb->addr, mdb->vid);
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if (!mdb_entry) {
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mdb_entry = lan966x_mdb_entry_add(lan966x, mdb);
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if (IS_ERR(mdb_entry))
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return PTR_ERR(mdb_entry);
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} else {
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lan966x_mdb_encode_mac(mac, mdb_entry, type);
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lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
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}
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if (cpu_port)
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mdb_entry->cpu_copy++;
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else
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mdb_entry->ports |= BIT(port->chip_port);
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/* Copy the frame to CPU only if the CPU is in the VLAN */
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if (lan966x_vlan_cpu_member_cpu_vlan_mask(lan966x, mdb_entry->vid) &&
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mdb_entry->cpu_copy)
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cpu_copy = true;
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lan966x_mdb_encode_mac(mac, mdb_entry, type);
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return lan966x_mac_ip_learn(lan966x, cpu_copy,
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mac, mdb_entry->vid, type);
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}
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static int lan966x_mdb_ip_del(struct lan966x_port *port,
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const struct switchdev_obj_port_mdb *mdb,
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enum macaccess_entry_type type)
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{
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bool cpu_port = netif_is_bridge_master(mdb->obj.orig_dev);
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struct lan966x *lan966x = port->lan966x;
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struct lan966x_mdb_entry *mdb_entry;
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unsigned char mac[ETH_ALEN];
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u16 ports;
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mdb_entry = lan966x_mdb_entry_get(lan966x, mdb->addr, mdb->vid);
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if (!mdb_entry)
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return -ENOENT;
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ports = mdb_entry->ports;
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if (cpu_port) {
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/* If there are still other references to the CPU port then
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* there is no point to delete and add again the same entry
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*/
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mdb_entry->cpu_copy--;
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if (mdb_entry->cpu_copy)
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return 0;
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} else {
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ports &= ~BIT(port->chip_port);
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}
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lan966x_mdb_encode_mac(mac, mdb_entry, type);
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lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
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mdb_entry->ports = ports;
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if (!mdb_entry->ports && !mdb_entry->cpu_copy) {
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list_del(&mdb_entry->list);
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kfree(mdb_entry);
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return 0;
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}
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lan966x_mdb_encode_mac(mac, mdb_entry, type);
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return lan966x_mac_ip_learn(lan966x, mdb_entry->cpu_copy,
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mac, mdb_entry->vid, type);
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}
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static struct lan966x_pgid_entry *
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lan966x_pgid_entry_add(struct lan966x *lan966x, int index, u16 ports)
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{
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struct lan966x_pgid_entry *pgid_entry;
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pgid_entry = kzalloc(sizeof(*pgid_entry), GFP_KERNEL);
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if (!pgid_entry)
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return ERR_PTR(-ENOMEM);
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pgid_entry->ports = ports;
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pgid_entry->index = index;
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refcount_set(&pgid_entry->refcount, 1);
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list_add_tail(&pgid_entry->list, &lan966x->pgid_entries);
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return pgid_entry;
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}
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static struct lan966x_pgid_entry *
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lan966x_pgid_entry_get(struct lan966x *lan966x,
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struct lan966x_mdb_entry *mdb_entry)
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{
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struct lan966x_pgid_entry *pgid_entry;
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int index;
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/* Try to find an existing pgid that uses the same ports as the
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* mdb_entry
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*/
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list_for_each_entry(pgid_entry, &lan966x->pgid_entries, list) {
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if (pgid_entry->ports == mdb_entry->ports) {
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refcount_inc(&pgid_entry->refcount);
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return pgid_entry;
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}
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}
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/* Try to find an empty pgid entry and allocate one in case it finds it,
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* otherwise it means that there are no more resources
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*/
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for (index = PGID_GP_START; index < PGID_GP_END; index++) {
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bool used = false;
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list_for_each_entry(pgid_entry, &lan966x->pgid_entries, list) {
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if (pgid_entry->index == index) {
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used = true;
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break;
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}
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}
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if (!used)
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return lan966x_pgid_entry_add(lan966x, index,
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mdb_entry->ports);
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}
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return ERR_PTR(-ENOSPC);
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}
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static void lan966x_pgid_entry_del(struct lan966x *lan966x,
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struct lan966x_pgid_entry *pgid_entry)
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{
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if (!refcount_dec_and_test(&pgid_entry->refcount))
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return;
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list_del(&pgid_entry->list);
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kfree(pgid_entry);
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}
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static int lan966x_mdb_l2_add(struct lan966x_port *port,
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const struct switchdev_obj_port_mdb *mdb,
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enum macaccess_entry_type type)
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{
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bool cpu_port = netif_is_bridge_master(mdb->obj.orig_dev);
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struct lan966x *lan966x = port->lan966x;
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struct lan966x_pgid_entry *pgid_entry;
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struct lan966x_mdb_entry *mdb_entry;
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unsigned char mac[ETH_ALEN];
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mdb_entry = lan966x_mdb_entry_get(lan966x, mdb->addr, mdb->vid);
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if (!mdb_entry) {
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mdb_entry = lan966x_mdb_entry_add(lan966x, mdb);
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if (IS_ERR(mdb_entry))
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return PTR_ERR(mdb_entry);
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} else {
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lan966x_pgid_entry_del(lan966x, mdb_entry->pgid);
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lan966x_mdb_encode_mac(mac, mdb_entry, type);
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lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
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}
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if (cpu_port) {
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mdb_entry->ports |= BIT(CPU_PORT);
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mdb_entry->cpu_copy++;
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} else {
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mdb_entry->ports |= BIT(port->chip_port);
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}
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pgid_entry = lan966x_pgid_entry_get(lan966x, mdb_entry);
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if (IS_ERR(pgid_entry)) {
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list_del(&mdb_entry->list);
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kfree(mdb_entry);
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return PTR_ERR(pgid_entry);
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}
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mdb_entry->pgid = pgid_entry;
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/* Copy the frame to CPU only if the CPU is in the VLAN */
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if (!lan966x_vlan_cpu_member_cpu_vlan_mask(lan966x, mdb_entry->vid) &&
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mdb_entry->cpu_copy)
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mdb_entry->ports &= BIT(CPU_PORT);
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lan_rmw(ANA_PGID_PGID_SET(mdb_entry->ports),
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ANA_PGID_PGID,
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lan966x, ANA_PGID(pgid_entry->index));
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return lan966x_mac_learn(lan966x, pgid_entry->index, mdb_entry->mac,
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mdb_entry->vid, type);
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}
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static int lan966x_mdb_l2_del(struct lan966x_port *port,
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const struct switchdev_obj_port_mdb *mdb,
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enum macaccess_entry_type type)
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{
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bool cpu_port = netif_is_bridge_master(mdb->obj.orig_dev);
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struct lan966x *lan966x = port->lan966x;
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struct lan966x_pgid_entry *pgid_entry;
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struct lan966x_mdb_entry *mdb_entry;
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unsigned char mac[ETH_ALEN];
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u16 ports;
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mdb_entry = lan966x_mdb_entry_get(lan966x, mdb->addr, mdb->vid);
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if (!mdb_entry)
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return -ENOENT;
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ports = mdb_entry->ports;
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if (cpu_port) {
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/* If there are still other references to the CPU port then
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* there is no point to delete and add again the same entry
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*/
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mdb_entry->cpu_copy--;
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if (mdb_entry->cpu_copy)
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return 0;
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ports &= ~BIT(CPU_PORT);
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} else {
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ports &= ~BIT(port->chip_port);
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}
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lan966x_mdb_encode_mac(mac, mdb_entry, type);
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lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
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lan966x_pgid_entry_del(lan966x, mdb_entry->pgid);
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mdb_entry->ports = ports;
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if (!mdb_entry->ports) {
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list_del(&mdb_entry->list);
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kfree(mdb_entry);
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return 0;
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}
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pgid_entry = lan966x_pgid_entry_get(lan966x, mdb_entry);
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if (IS_ERR(pgid_entry)) {
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list_del(&mdb_entry->list);
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kfree(mdb_entry);
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return PTR_ERR(pgid_entry);
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}
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mdb_entry->pgid = pgid_entry;
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lan_rmw(ANA_PGID_PGID_SET(mdb_entry->ports),
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ANA_PGID_PGID,
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lan966x, ANA_PGID(pgid_entry->index));
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return lan966x_mac_learn(lan966x, pgid_entry->index, mdb_entry->mac,
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mdb_entry->vid, type);
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}
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static enum macaccess_entry_type
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lan966x_mdb_classify(const unsigned char *mac)
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{
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if (mac[0] == 0x01 && mac[1] == 0x00 && mac[2] == 0x5e)
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return ENTRYTYPE_MACV4;
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if (mac[0] == 0x33 && mac[1] == 0x33)
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return ENTRYTYPE_MACV6;
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return ENTRYTYPE_LOCKED;
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}
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int lan966x_handle_port_mdb_add(struct lan966x_port *port,
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const struct switchdev_obj *obj)
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{
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const struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
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enum macaccess_entry_type type;
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/* Split the way the entries are added for ipv4/ipv6 and for l2. The
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* reason is that for ipv4/ipv6 it doesn't require to use any pgid
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* entry, while for l2 is required to use pgid entries
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*/
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type = lan966x_mdb_classify(mdb->addr);
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if (type == ENTRYTYPE_MACV4 || type == ENTRYTYPE_MACV6)
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return lan966x_mdb_ip_add(port, mdb, type);
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return lan966x_mdb_l2_add(port, mdb, type);
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}
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int lan966x_handle_port_mdb_del(struct lan966x_port *port,
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const struct switchdev_obj *obj)
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{
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const struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
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enum macaccess_entry_type type;
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/* Split the way the entries are removed for ipv4/ipv6 and for l2. The
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* reason is that for ipv4/ipv6 it doesn't require to use any pgid
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* entry, while for l2 is required to use pgid entries
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*/
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type = lan966x_mdb_classify(mdb->addr);
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if (type == ENTRYTYPE_MACV4 || type == ENTRYTYPE_MACV6)
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return lan966x_mdb_ip_del(port, mdb, type);
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return lan966x_mdb_l2_del(port, mdb, type);
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}
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static void lan966x_mdb_ip_cpu_copy(struct lan966x *lan966x,
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struct lan966x_mdb_entry *mdb_entry,
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enum macaccess_entry_type type)
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{
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unsigned char mac[ETH_ALEN];
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lan966x_mdb_encode_mac(mac, mdb_entry, type);
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lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
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lan966x_mac_ip_learn(lan966x, true, mac, mdb_entry->vid, type);
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}
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static void lan966x_mdb_l2_cpu_copy(struct lan966x *lan966x,
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struct lan966x_mdb_entry *mdb_entry,
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enum macaccess_entry_type type)
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{
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struct lan966x_pgid_entry *pgid_entry;
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unsigned char mac[ETH_ALEN];
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lan966x_pgid_entry_del(lan966x, mdb_entry->pgid);
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lan966x_mdb_encode_mac(mac, mdb_entry, type);
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lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
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mdb_entry->ports |= BIT(CPU_PORT);
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pgid_entry = lan966x_pgid_entry_get(lan966x, mdb_entry);
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if (IS_ERR(pgid_entry))
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return;
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mdb_entry->pgid = pgid_entry;
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lan_rmw(ANA_PGID_PGID_SET(mdb_entry->ports),
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ANA_PGID_PGID,
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lan966x, ANA_PGID(pgid_entry->index));
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lan966x_mac_learn(lan966x, pgid_entry->index, mdb_entry->mac,
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mdb_entry->vid, type);
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}
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void lan966x_mdb_write_entries(struct lan966x *lan966x, u16 vid)
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{
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struct lan966x_mdb_entry *mdb_entry;
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enum macaccess_entry_type type;
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list_for_each_entry(mdb_entry, &lan966x->mdb_entries, list) {
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if (mdb_entry->vid != vid || !mdb_entry->cpu_copy)
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continue;
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type = lan966x_mdb_classify(mdb_entry->mac);
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if (type == ENTRYTYPE_MACV4 || type == ENTRYTYPE_MACV6)
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lan966x_mdb_ip_cpu_copy(lan966x, mdb_entry, type);
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else
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lan966x_mdb_l2_cpu_copy(lan966x, mdb_entry, type);
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}
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}
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static void lan966x_mdb_ip_cpu_remove(struct lan966x *lan966x,
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struct lan966x_mdb_entry *mdb_entry,
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enum macaccess_entry_type type)
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{
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unsigned char mac[ETH_ALEN];
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lan966x_mdb_encode_mac(mac, mdb_entry, type);
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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);
|
|
}
|
|
}
|
|
|
|
void lan966x_mdb_clear_entries(struct lan966x *lan966x)
|
|
{
|
|
struct lan966x_mdb_entry *mdb_entry;
|
|
enum macaccess_entry_type type;
|
|
unsigned char mac[ETH_ALEN];
|
|
|
|
list_for_each_entry(mdb_entry, &lan966x->mdb_entries, list) {
|
|
type = lan966x_mdb_classify(mdb_entry->mac);
|
|
|
|
lan966x_mdb_encode_mac(mac, mdb_entry, type);
|
|
/* Remove just the MAC entry, still keep the PGID in case of L2
|
|
* entries because this can be restored at later point
|
|
*/
|
|
lan966x_mac_forget(lan966x, mac, mdb_entry->vid, type);
|
|
}
|
|
}
|
|
|
|
void lan966x_mdb_restore_entries(struct lan966x *lan966x)
|
|
{
|
|
struct lan966x_mdb_entry *mdb_entry;
|
|
enum macaccess_entry_type type;
|
|
unsigned char mac[ETH_ALEN];
|
|
bool cpu_copy = false;
|
|
|
|
list_for_each_entry(mdb_entry, &lan966x->mdb_entries, list) {
|
|
type = lan966x_mdb_classify(mdb_entry->mac);
|
|
|
|
lan966x_mdb_encode_mac(mac, mdb_entry, type);
|
|
if (type == ENTRYTYPE_MACV4 || type == ENTRYTYPE_MACV6) {
|
|
/* 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_mac_ip_learn(lan966x, cpu_copy, mac,
|
|
mdb_entry->vid, type);
|
|
} else {
|
|
lan966x_mac_learn(lan966x, mdb_entry->pgid->index,
|
|
mdb_entry->mac,
|
|
mdb_entry->vid, type);
|
|
}
|
|
}
|
|
}
|