// SPDX-License-Identifier: GPL-2.0+
#include <net/switchdev.h>
#include "lan966x_main.h"
#define LAN966X_MAC_COLUMNS 4
#define MACACCESS_CMD_IDLE 0
#define MACACCESS_CMD_LEARN 1
#define MACACCESS_CMD_FORGET 2
#define MACACCESS_CMD_AGE 3
#define MACACCESS_CMD_GET_NEXT 4
#define MACACCESS_CMD_INIT 5
#define MACACCESS_CMD_READ 6
#define MACACCESS_CMD_WRITE 7
#define MACACCESS_CMD_SYNC_GET_NEXT 8
#define LAN966X_MAC_INVALID_ROW -1
struct lan966x_mac_entry {
struct list_head list;
unsigned char mac[ETH_ALEN] __aligned(2);
u16 vid;
u16 port_index;
int row;
bool lag;
};
struct lan966x_mac_raw_entry {
u32 mach;
u32 macl;
u32 maca;
bool processed;
};
static int lan966x_mac_get_status(struct lan966x *lan966x)
{
return lan_rd(lan966x, ANA_MACACCESS);
}
static int lan966x_mac_wait_for_completion(struct lan966x *lan966x)
{
u32 val;
return readx_poll_timeout_atomic(lan966x_mac_get_status,
lan966x, val,
(ANA_MACACCESS_MAC_TABLE_CMD_GET(val)) ==
MACACCESS_CMD_IDLE,
TABLE_UPDATE_SLEEP_US,
TABLE_UPDATE_TIMEOUT_US);
}
static void lan966x_mac_select(struct lan966x *lan966x,
const unsigned char mac[ETH_ALEN],
unsigned int vid)
{
u32 macl = 0, mach = 0;
/* Set the MAC address to handle and the vlan associated in a format
* understood by the hardware.
*/
mach |= vid << 16;
mach |= mac[0] << 8;
mach |= mac[1] << 0;
macl |= mac[2] << 24;
macl |= mac[3] << 16;
macl |= mac[4] << 8;
macl |= mac[5] << 0;
lan_wr(macl, lan966x, ANA_MACLDATA);
lan_wr(mach, lan966x, ANA_MACHDATA);
}
static int __lan966x_mac_learn_locked(struct lan966x *lan966x, int pgid,
bool cpu_copy,
const unsigned char mac[ETH_ALEN],
unsigned int vid,
enum macaccess_entry_type type)
{
lockdep_assert_held(&lan966x->mac_lock);
lan966x_mac_select(lan966x, mac, vid);
/* Issue a write command */
lan_wr(ANA_MACACCESS_VALID_SET(1) |
ANA_MACACCESS_CHANGE2SW_SET(0) |
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);
return lan966x_mac_wait_for_completion(lan966x);
}
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)
{
int ret;
spin_lock(&lan966x->mac_lock);
ret = __lan966x_mac_learn_locked(lan966x, pgid, cpu_copy, mac, vid, type);
spin_unlock(&lan966x->mac_lock);
return ret;
}
/* 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);
}
static int lan966x_mac_learn_locked(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_locked(lan966x, port, false, mac, vid, type);
}
static int lan966x_mac_forget_locked(struct lan966x *lan966x,
const unsigned char mac[ETH_ALEN],
unsigned int vid,
enum macaccess_entry_type type)
{
lockdep_assert_held(&lan966x->mac_lock);
lan966x_mac_select(lan966x, mac, vid);
/* Issue a forget command */
lan_wr(ANA_MACACCESS_ENTRYTYPE_SET(type) |
ANA_MACACCESS_MAC_TABLE_CMD_SET(MACACCESS_CMD_FORGET),
lan966x, ANA_MACACCESS);
return lan966x_mac_wait_for_completion(lan966x);
}
int lan966x_mac_forget(struct lan966x *lan966x,
const unsigned char mac[ETH_ALEN],
unsigned int vid,
enum macaccess_entry_type type)
{
int ret;
spin_lock(&lan966x->mac_lock);
ret = lan966x_mac_forget_locked(lan966x, mac, vid, type);
spin_unlock(&lan966x->mac_lock);
return ret;
}
int lan966x_mac_cpu_learn(struct lan966x *lan966x, const char *addr, u16 vid)
{
return lan966x_mac_learn(lan966x, PGID_CPU, addr, vid, ENTRYTYPE_LOCKED);
}
int lan966x_mac_cpu_forget(struct lan966x *lan966x, const char *addr, u16 vid)
{
return lan966x_mac_forget(lan966x, addr, vid, ENTRYTYPE_LOCKED);
}
void lan966x_mac_set_ageing(struct lan966x *lan966x,
u32 ageing)
{
lan_rmw(ANA_AUTOAGE_AGE_PERIOD_SET(ageing / 2),
ANA_AUTOAGE_AGE_PERIOD,
lan966x, ANA_AUTOAGE);
}
void lan966x_mac_init(struct lan966x *lan966x)
{
/* Clear the MAC table */
lan_wr(MACACCESS_CMD_INIT, lan966x, ANA_MACACCESS);
lan966x_mac_wait_for_completion(lan966x);
spin_lock_init(&lan966x->mac_lock);
INIT_LIST_HEAD(&lan966x->mac_entries);
}
static struct lan966x_mac_entry *lan966x_mac_alloc_entry(struct lan966x_port *port,
const unsigned char *mac,
u16 vid)
{
struct lan966x_mac_entry *mac_entry;
mac_entry = kzalloc(sizeof(*mac_entry), GFP_ATOMIC);
if (!mac_entry)
return NULL;
memcpy(mac_entry->mac, mac, ETH_ALEN);
mac_entry->vid = vid;
mac_entry->port_index = port->chip_port;
mac_entry->row = LAN966X_MAC_INVALID_ROW;
mac_entry->lag = port->bond ? true : false;
return mac_entry;
}
static struct lan966x_mac_entry *lan966x_mac_find_entry(struct lan966x *lan966x,
const unsigned char *mac,
u16 vid, u16 port_index)
{
struct lan966x_mac_entry *res = NULL;
struct lan966x_mac_entry *mac_entry;
list_for_each_entry(mac_entry, &lan966x->mac_entries, list) {
if (mac_entry->vid == vid &&
ether_addr_equal(mac, mac_entry->mac) &&
mac_entry->port_index == port_index) {
res = mac_entry;
break;
}
}
return res;
}
static int lan966x_mac_lookup(struct lan966x *lan966x,
const unsigned char mac[ETH_ALEN],
unsigned int vid, enum macaccess_entry_type type)
{
int ret;
lan966x_mac_select(lan966x, mac, vid);
/* Issue a read command */
lan_wr(ANA_MACACCESS_ENTRYTYPE_SET(type) |
ANA_MACACCESS_VALID_SET(1) |
ANA_MACACCESS_MAC_TABLE_CMD_SET(MACACCESS_CMD_READ),
lan966x, ANA_MACACCESS);
ret = lan966x_mac_wait_for_completion(lan966x);
if (ret)
return ret;
return ANA_MACACCESS_VALID_GET(lan_rd(lan966x, ANA_MACACCESS));
}
static void lan966x_fdb_call_notifiers(enum switchdev_notifier_type type,
const char *mac, u16 vid,
struct net_device *dev)
{
struct switchdev_notifier_fdb_info info = { 0 };
info.addr = mac;
info.vid = vid;
info.offloaded = true;
call_switchdev_notifiers(type, dev, &info.info, NULL);
}
int lan966x_mac_add_entry(struct lan966x *lan966x, struct lan966x_port *port,
const unsigned char *addr, u16 vid)
{
struct lan966x_mac_entry *mac_entry;
spin_lock(&lan966x->mac_lock);
if (lan966x_mac_lookup(lan966x, addr, vid, ENTRYTYPE_NORMAL)) {
spin_unlock(&lan966x->mac_lock);
return 0;
}
/* In case the entry already exists, don't add it again to SW,
* just update HW, but we need to look in the actual HW because
* it is possible for an entry to be learn by HW and before we
* get the interrupt the frame will reach CPU and the CPU will
* add the entry but without the extern_learn flag.
*/
mac_entry = lan966x_mac_find_entry(lan966x, addr, vid, port->chip_port);
if (mac_entry) {
spin_unlock(&lan966x->mac_lock);
goto mac_learn;
}
mac_entry = lan966x_mac_alloc_entry(port, addr, vid);
if (!mac_entry) {
spin_unlock(&lan966x->mac_lock);
return -ENOMEM;
}
list_add_tail(&mac_entry->list, &lan966x->mac_entries);
spin_unlock(&lan966x->mac_lock);
lan966x_fdb_call_notifiers(SWITCHDEV_FDB_OFFLOADED, addr, vid,
port->bond ?: port->dev);
mac_learn:
lan966x_mac_learn(lan966x, port->chip_port, addr, vid, ENTRYTYPE_LOCKED);
return 0;
}
int lan966x_mac_del_entry(struct lan966x *lan966x, const unsigned char *addr,
u16 vid)
{
struct lan966x_mac_entry *mac_entry, *tmp;
spin_lock(&lan966x->mac_lock);
list_for_each_entry_safe(mac_entry, tmp, &lan966x->mac_entries,
list) {
if (mac_entry->vid == vid &&
ether_addr_equal(addr, mac_entry->mac)) {
lan966x_mac_forget_locked(lan966x, mac_entry->mac,
mac_entry->vid,
ENTRYTYPE_LOCKED);
list_del(&mac_entry->list);
kfree(mac_entry);
}
}
spin_unlock(&lan966x->mac_lock);
return 0;
}
void lan966x_mac_lag_replace_port_entry(struct lan966x *lan966x,
struct lan966x_port *src,
struct lan966x_port *dst)
{
struct lan966x_mac_entry *mac_entry;
spin_lock(&lan966x->mac_lock);
list_for_each_entry(mac_entry, &lan966x->mac_entries, list) {
if (mac_entry->port_index == src->chip_port &&
mac_entry->lag) {
lan966x_mac_forget_locked(lan966x, mac_entry->mac,
mac_entry->vid,
ENTRYTYPE_LOCKED);
lan966x_mac_learn_locked(lan966x, dst->chip_port,
mac_entry->mac, mac_entry->vid,
ENTRYTYPE_LOCKED);
mac_entry->port_index = dst->chip_port;
}
}
spin_unlock(&lan966x->mac_lock);
}
void lan966x_mac_lag_remove_port_entry(struct lan966x *lan966x,
struct lan966x_port *src)
{
struct lan966x_mac_entry *mac_entry, *tmp;
spin_lock(&lan966x->mac_lock);
list_for_each_entry_safe(mac_entry, tmp, &lan966x->mac_entries,
list) {
if (mac_entry->port_index == src->chip_port &&
mac_entry->lag) {
lan966x_mac_forget_locked(lan966x, mac_entry->mac,
mac_entry->vid,
ENTRYTYPE_LOCKED);
list_del(&mac_entry->list);
kfree(mac_entry);
}
}
spin_unlock(&lan966x->mac_lock);
}
void lan966x_mac_purge_entries(struct lan966x *lan966x)
{
struct lan966x_mac_entry *mac_entry, *tmp;
spin_lock(&lan966x->mac_lock);
list_for_each_entry_safe(mac_entry, tmp, &lan966x->mac_entries,
list) {
lan966x_mac_forget_locked(lan966x, mac_entry->mac,
mac_entry->vid, ENTRYTYPE_LOCKED);
list_del(&mac_entry->list);
kfree(mac_entry);
}
spin_unlock(&lan966x->mac_lock);
}
static void lan966x_mac_notifiers(enum switchdev_notifier_type type,
unsigned char *mac, u32 vid,
struct net_device *dev)
{
rtnl_lock();
lan966x_fdb_call_notifiers(type, mac, vid, dev);
rtnl_unlock();
}
static void lan966x_mac_process_raw_entry(struct lan966x_mac_raw_entry *raw_entry,
u8 *mac, u16 *vid, u32 *dest_idx)
{
mac[0] = (raw_entry->mach >> 8) & 0xff;
mac[1] = (raw_entry->mach >> 0) & 0xff;
mac[2] = (raw_entry->macl >> 24) & 0xff;
mac[3] = (raw_entry->macl >> 16) & 0xff;
mac[4] = (raw_entry->macl >> 8) & 0xff;
mac[5] = (raw_entry->macl >> 0) & 0xff;
*vid = (raw_entry->mach >> 16) & 0xfff;
*dest_idx = ANA_MACACCESS_DEST_IDX_GET(raw_entry->maca);
}
static void lan966x_mac_irq_process(struct lan966x *lan966x, u32 row,
struct lan966x_mac_raw_entry *raw_entries)
{
struct lan966x_mac_entry *mac_entry, *tmp;
unsigned char mac[ETH_ALEN] __aligned(2);
struct list_head mac_deleted_entries;
struct lan966x_port *port;
u32 dest_idx;
u32 column;
u16 vid;
INIT_LIST_HEAD(&mac_deleted_entries);
spin_lock(&lan966x->mac_lock);
list_for_each_entry_safe(mac_entry, tmp, &lan966x->mac_entries, list) {
bool found = false;
if (mac_entry->row != row)
continue;
for (column = 0; column < LAN966X_MAC_COLUMNS; ++column) {
/* All the valid entries are at the start of the row,
* so when get one invalid entry it can just skip the
* rest of the columns
*/
if (!ANA_MACACCESS_VALID_GET(raw_entries[column].maca))
break;
lan966x_mac_process_raw_entry(&raw_entries[column],
mac, &vid, &dest_idx);
if (WARN_ON(dest_idx >= lan966x->num_phys_ports))
continue;
/* If the entry in SW is found, then there is nothing
* to do
*/
if (mac_entry->vid == vid &&
ether_addr_equal(mac_entry->mac, mac) &&
mac_entry->port_index == dest_idx) {
raw_entries[column].processed = true;
found = true;
break;
}
}
if (!found) {
list_del(&mac_entry->list);
/* Move the entry from SW list to a tmp list such that
* it would be deleted later
*/
list_add_tail(&mac_entry->list, &mac_deleted_entries);
}
}
spin_unlock(&lan966x->mac_lock);
list_for_each_entry_safe(mac_entry, tmp, &mac_deleted_entries, list) {
/* Notify the bridge that the entry doesn't exist
* anymore in the HW
*/
port = lan966x->ports[mac_entry->port_index];
lan966x_mac_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE,
mac_entry->mac, mac_entry->vid,
port->bond ?: port->dev);
list_del(&mac_entry->list);
kfree(mac_entry);
}
/* Now go to the list of columns and see if any entry was not in the SW
* list, then that means that the entry is new so it needs to notify the
* bridge.
*/
for (column = 0; column < LAN966X_MAC_COLUMNS; ++column) {
/* All the valid entries are at the start of the row, so when
* get one invalid entry it can just skip the rest of the columns
*/
if (!ANA_MACACCESS_VALID_GET(raw_entries[column].maca))
break;
/* If the entry already exists then don't do anything */
if (raw_entries[column].processed)
continue;
lan966x_mac_process_raw_entry(&raw_entries[column],
mac, &vid, &dest_idx);
if (WARN_ON(dest_idx >= lan966x->num_phys_ports))
continue;
spin_lock(&lan966x->mac_lock);
mac_entry = lan966x_mac_find_entry(lan966x, mac, vid, dest_idx);
if (mac_entry) {
spin_unlock(&lan966x->mac_lock);
continue;
}
port = lan966x->ports[dest_idx];
mac_entry = lan966x_mac_alloc_entry(port, mac, vid);
if (!mac_entry) {
spin_unlock(&lan966x->mac_lock);
return;
}
mac_entry->row = row;
list_add_tail(&mac_entry->list, &lan966x->mac_entries);
spin_unlock(&lan966x->mac_lock);
lan966x_mac_notifiers(SWITCHDEV_FDB_ADD_TO_BRIDGE,
mac, vid, port->bond ?: port->dev);
}
}
irqreturn_t lan966x_mac_irq_handler(struct lan966x *lan966x)
{
struct lan966x_mac_raw_entry entry[LAN966X_MAC_COLUMNS] = { 0 };
u32 index, column;
bool stop = true;
u32 val;
/* Start the scan from 0, 0 */
lan_wr(ANA_MACTINDX_M_INDEX_SET(0) |
ANA_MACTINDX_BUCKET_SET(0),
lan966x, ANA_MACTINDX);
while (1) {
spin_lock(&lan966x->mac_lock);
lan_rmw(ANA_MACACCESS_MAC_TABLE_CMD_SET(MACACCESS_CMD_SYNC_GET_NEXT),
ANA_MACACCESS_MAC_TABLE_CMD,
lan966x, ANA_MACACCESS);
lan966x_mac_wait_for_completion(lan966x);
val = lan_rd(lan966x, ANA_MACTINDX);
index = ANA_MACTINDX_M_INDEX_GET(val);
column = ANA_MACTINDX_BUCKET_GET(val);
/* The SYNC-GET-NEXT returns all the entries(4) in a row in
* which is suffered a change. By change it means that new entry
* was added or an entry was removed because of ageing.
* It would return all the columns for that row. And after that
* it would return the next row The stop conditions of the
* SYNC-GET-NEXT is when it reaches 'directly' to row 0
* column 3. So if SYNC-GET-NEXT returns row 0 and column 0
* then it is required to continue to read more even if it
* reaches row 0 and column 3.
*/
if (index == 0 && column == 0)
stop = false;
if (column == LAN966X_MAC_COLUMNS - 1 &&
index == 0 && stop) {
spin_unlock(&lan966x->mac_lock);
break;
}
entry[column].mach = lan_rd(lan966x, ANA_MACHDATA);
entry[column].macl = lan_rd(lan966x, ANA_MACLDATA);
entry[column].maca = lan_rd(lan966x, ANA_MACACCESS);
spin_unlock(&lan966x->mac_lock);
/* Once all the columns are read process them */
if (column == LAN966X_MAC_COLUMNS - 1) {
lan966x_mac_irq_process(lan966x, index, entry);
/* A row was processed so it is safe to assume that the
* next row/column can be the stop condition
*/
stop = true;
}
}
lan_rmw(ANA_ANAINTR_INTR_SET(0),
ANA_ANAINTR_INTR,
lan966x, ANA_ANAINTR);
return IRQ_HANDLED;
}
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