#include <linux/etherdevice.h>
#include <linux/jiffies.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/netdev_features.h>
#include <linux/of.h>
#include <linux/of_net.h>
#include <linux/if_vlan.h>
#include <linux/phylink.h>
#include "prestera.h"
#include "prestera_hw.h"
#include "prestera_acl.h"
#include "prestera_flow.h"
#include "prestera_span.h"
#include "prestera_rxtx.h"
#include "prestera_devlink.h"
#include "prestera_ethtool.h"
#include "prestera_counter.h"
#include "prestera_switchdev.h"
#define PRESTERA_MTU_DEFAULT 1536
#define PRESTERA_STATS_DELAY_MS 1000
#define PRESTERA_MAC_ADDR_NUM_MAX 255
static struct workqueue_struct *prestera_wq;
static struct workqueue_struct *prestera_owq;
void prestera_queue_work(struct work_struct *work)
{
queue_work(prestera_owq, work);
}
void prestera_queue_delayed_work(struct delayed_work *work, unsigned long delay)
{
queue_delayed_work(prestera_wq, work, delay);
}
void prestera_queue_drain(void)
{
drain_workqueue(prestera_wq);
drain_workqueue(prestera_owq);
}
int prestera_port_learning_set(struct prestera_port *port, bool learn)
{
return prestera_hw_port_learning_set(port, learn);
}
int prestera_port_uc_flood_set(struct prestera_port *port, bool flood)
{
return prestera_hw_port_uc_flood_set(port, flood);
}
int prestera_port_mc_flood_set(struct prestera_port *port, bool flood)
{
return prestera_hw_port_mc_flood_set(port, flood);
}
int prestera_port_br_locked_set(struct prestera_port *port, bool br_locked)
{
return prestera_hw_port_br_locked_set(port, br_locked);
}
int prestera_port_pvid_set(struct prestera_port *port, u16 vid)
{
enum prestera_accept_frm_type frm_type;
int err;
frm_type = PRESTERA_ACCEPT_FRAME_TYPE_TAGGED;
if (vid) {
err = prestera_hw_vlan_port_vid_set(port, vid);
if (err)
return err;
frm_type = PRESTERA_ACCEPT_FRAME_TYPE_ALL;
}
err = prestera_hw_port_accept_frm_type(port, frm_type);
if (err && frm_type == PRESTERA_ACCEPT_FRAME_TYPE_ALL)
prestera_hw_vlan_port_vid_set(port, port->pvid);
port->pvid = vid;
return 0;
}
struct prestera_port *prestera_port_find_by_hwid(struct prestera_switch *sw,
u32 dev_id, u32 hw_id)
{
struct prestera_port *port = NULL, *tmp;
read_lock(&sw->port_list_lock);
list_for_each_entry(tmp, &sw->port_list, list) {
if (tmp->dev_id == dev_id && tmp->hw_id == hw_id) {
port = tmp;
break;
}
}
read_unlock(&sw->port_list_lock);
return port;
}
struct prestera_port *prestera_find_port(struct prestera_switch *sw, u32 id)
{
struct prestera_port *port = NULL, *tmp;
read_lock(&sw->port_list_lock);
list_for_each_entry(tmp, &sw->port_list, list) {
if (tmp->id == id) {
port = tmp;
break;
}
}
read_unlock(&sw->port_list_lock);
return port;
}
struct prestera_switch *prestera_switch_get(struct net_device *dev)
{
struct prestera_port *port;
port = prestera_port_dev_lower_find(dev);
return port ? port->sw : NULL;
}
int prestera_port_cfg_mac_read(struct prestera_port *port,
struct prestera_port_mac_config *cfg)
{
*cfg = port->cfg_mac;
return 0;
}
int prestera_port_cfg_mac_write(struct prestera_port *port,
struct prestera_port_mac_config *cfg)
{
int err;
err = prestera_hw_port_mac_mode_set(port, cfg->admin,
cfg->mode, cfg->inband, cfg->speed,
cfg->duplex, cfg->fec);
if (err)
return err;
port->cfg_mac = *cfg;
return 0;
}
static int prestera_port_open(struct net_device *dev)
{
struct prestera_port *port = netdev_priv(dev);
struct prestera_port_mac_config cfg_mac;
int err = 0;
if (port->phy_link) {
phylink_start(port->phy_link);
} else {
if (port->caps.transceiver == PRESTERA_PORT_TCVR_SFP) {
err = prestera_port_cfg_mac_read(port, &cfg_mac);
if (!err) {
cfg_mac.admin = true;
err = prestera_port_cfg_mac_write(port,
&cfg_mac);
}
} else {
port->cfg_phy.admin = true;
err = prestera_hw_port_phy_mode_set(port, true,
port->autoneg,
port->cfg_phy.mode,
port->adver_link_modes,
port->cfg_phy.mdix);
}
}
netif_start_queue(dev);
return err;
}
static int prestera_port_close(struct net_device *dev)
{
struct prestera_port *port = netdev_priv(dev);
struct prestera_port_mac_config cfg_mac;
int err = 0;
netif_stop_queue(dev);
if (port->phy_link) {
phylink_stop(port->phy_link);
phylink_disconnect_phy(port->phy_link);
err = prestera_port_cfg_mac_read(port, &cfg_mac);
if (!err) {
cfg_mac.admin = false;
prestera_port_cfg_mac_write(port, &cfg_mac);
}
} else {
if (port->caps.transceiver == PRESTERA_PORT_TCVR_SFP) {
err = prestera_port_cfg_mac_read(port, &cfg_mac);
if (!err) {
cfg_mac.admin = false;
prestera_port_cfg_mac_write(port, &cfg_mac);
}
} else {
port->cfg_phy.admin = false;
err = prestera_hw_port_phy_mode_set(port, false, port->autoneg,
port->cfg_phy.mode,
port->adver_link_modes,
port->cfg_phy.mdix);
}
}
return err;
}
static void
prestera_port_mac_state_cache_read(struct prestera_port *port,
struct prestera_port_mac_state *state)
{
spin_lock(&port->state_mac_lock);
*state = port->state_mac;
spin_unlock(&port->state_mac_lock);
}
static void
prestera_port_mac_state_cache_write(struct prestera_port *port,
struct prestera_port_mac_state *state)
{
spin_lock(&port->state_mac_lock);
port->state_mac = *state;
spin_unlock(&port->state_mac_lock);
}
static struct prestera_port *prestera_pcs_to_port(struct phylink_pcs *pcs)
{
return container_of(pcs, struct prestera_port, phylink_pcs);
}
static void prestera_mac_config(struct phylink_config *config,
unsigned int an_mode,
const struct phylink_link_state *state)
{
}
static void prestera_mac_link_down(struct phylink_config *config,
unsigned int mode, phy_interface_t interface)
{
struct net_device *ndev = to_net_dev(config->dev);
struct prestera_port *port = netdev_priv(ndev);
struct prestera_port_mac_state state_mac;
memset(&state_mac, 0, sizeof(state_mac));
state_mac.valid = false;
prestera_port_mac_state_cache_write(port, &state_mac);
}
static void prestera_mac_link_up(struct phylink_config *config,
struct phy_device *phy,
unsigned int mode, phy_interface_t interface,
int speed, int duplex,
bool tx_pause, bool rx_pause)
{
}
static struct phylink_pcs *
prestera_mac_select_pcs(struct phylink_config *config,
phy_interface_t interface)
{
struct net_device *dev = to_net_dev(config->dev);
struct prestera_port *port = netdev_priv(dev);
return &port->phylink_pcs;
}
static void prestera_pcs_get_state(struct phylink_pcs *pcs,
unsigned int neg_mode,
struct phylink_link_state *state)
{
struct prestera_port *port = container_of(pcs, struct prestera_port,
phylink_pcs);
struct prestera_port_mac_state smac;
prestera_port_mac_state_cache_read(port, &smac);
if (smac.valid) {
state->link = smac.oper ? 1 : 0;
state->an_complete = (smac.oper && port->autoneg) ? 1 : 0;
state->speed = smac.speed;
state->duplex = smac.duplex;
} else {
state->link = 0;
state->an_complete = 0;
}
}
static int prestera_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode,
phy_interface_t interface,
const unsigned long *advertising,
bool permit_pause_to_mac)
{
struct prestera_port *port = prestera_pcs_to_port(pcs);
struct prestera_port_mac_config cfg_mac;
int err;
err = prestera_port_cfg_mac_read(port, &cfg_mac);
if (err)
return err;
cfg_mac.admin = true;
cfg_mac.fec = PRESTERA_PORT_FEC_OFF;
cfg_mac.inband = neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED;
switch (interface) {
case PHY_INTERFACE_MODE_10GBASER:
cfg_mac.speed = SPEED_10000;
cfg_mac.mode = PRESTERA_MAC_MODE_SR_LR;
break;
case PHY_INTERFACE_MODE_2500BASEX:
cfg_mac.speed = SPEED_2500;
cfg_mac.duplex = DUPLEX_FULL;
cfg_mac.mode = PRESTERA_MAC_MODE_SGMII;
break;
case PHY_INTERFACE_MODE_SGMII:
cfg_mac.mode = PRESTERA_MAC_MODE_SGMII;
break;
case PHY_INTERFACE_MODE_1000BASEX:
default:
cfg_mac.speed = SPEED_1000;
cfg_mac.duplex = DUPLEX_FULL;
cfg_mac.mode = PRESTERA_MAC_MODE_1000BASE_X;
break;
}
err = prestera_port_cfg_mac_write(port, &cfg_mac);
if (err)
return err;
return 0;
}
static void prestera_pcs_an_restart(struct phylink_pcs *pcs)
{
}
static const struct phylink_mac_ops prestera_mac_ops = {
.mac_select_pcs = prestera_mac_select_pcs,
.mac_config = prestera_mac_config,
.mac_link_down = prestera_mac_link_down,
.mac_link_up = prestera_mac_link_up,
};
static const struct phylink_pcs_ops prestera_pcs_ops = {
.pcs_get_state = prestera_pcs_get_state,
.pcs_config = prestera_pcs_config,
.pcs_an_restart = prestera_pcs_an_restart,
};
static int prestera_port_sfp_bind(struct prestera_port *port)
{
struct prestera_switch *sw = port->sw;
struct device_node *ports, *node;
struct fwnode_handle *fwnode;
struct phylink *phy_link;
int err;
if (!sw->np)
return 0;
of_node_get(sw->np);
ports = of_find_node_by_name(sw->np, "ports");
for_each_child_of_node(ports, node) {
int num;
err = of_property_read_u32(node, "prestera,port-num", &num);
if (err) {
dev_err(sw->dev->dev,
"device node %pOF has no valid reg property: %d\n",
node, err);
goto out;
}
if (port->fp_id != num)
continue;
port->phylink_pcs.ops = &prestera_pcs_ops;
port->phy_config.dev = &port->dev->dev;
port->phy_config.type = PHYLINK_NETDEV;
fwnode = of_fwnode_handle(node);
__set_bit(PHY_INTERFACE_MODE_10GBASER,
port->phy_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_2500BASEX,
port->phy_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_SGMII,
port->phy_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_1000BASEX,
port->phy_config.supported_interfaces);
port->phy_config.mac_capabilities =
MAC_1000 | MAC_2500FD | MAC_10000FD;
phy_link = phylink_create(&port->phy_config, fwnode,
PHY_INTERFACE_MODE_INTERNAL,
&prestera_mac_ops);
if (IS_ERR(phy_link)) {
netdev_err(port->dev, "failed to create phylink\n");
err = PTR_ERR(phy_link);
goto out;
}
port->phy_link = phy_link;
break;
}
out:
of_node_put(node);
of_node_put(ports);
return err;
}
static int prestera_port_sfp_unbind(struct prestera_port *port)
{
if (port->phy_link)
phylink_destroy(port->phy_link);
return 0;
}
static netdev_tx_t prestera_port_xmit(struct sk_buff *skb,
struct net_device *dev)
{
return prestera_rxtx_xmit(netdev_priv(dev), skb);
}
int prestera_is_valid_mac_addr(struct prestera_port *port, const u8 *addr)
{
if (!is_valid_ether_addr(addr))
return -EADDRNOTAVAIL;
if (memcmp(port->sw->base_mac, addr, ETH_ALEN - 1))
return -EINVAL;
return 0;
}
static int prestera_port_set_mac_address(struct net_device *dev, void *p)
{
struct prestera_port *port = netdev_priv(dev);
struct sockaddr *addr = p;
int err;
err = prestera_is_valid_mac_addr(port, addr->sa_data);
if (err)
return err;
err = prestera_hw_port_mac_set(port, addr->sa_data);
if (err)
return err;
eth_hw_addr_set(dev, addr->sa_data);
return 0;
}
static int prestera_port_change_mtu(struct net_device *dev, int mtu)
{
struct prestera_port *port = netdev_priv(dev);
int err;
err = prestera_hw_port_mtu_set(port, mtu);
if (err)
return err;
WRITE_ONCE(dev->mtu, mtu);
return 0;
}
static void prestera_port_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *stats)
{
struct prestera_port *port = netdev_priv(dev);
struct prestera_port_stats *port_stats = &port->cached_hw_stats.stats;
stats->rx_packets = port_stats->broadcast_frames_received +
port_stats->multicast_frames_received +
port_stats->unicast_frames_received;
stats->tx_packets = port_stats->broadcast_frames_sent +
port_stats->multicast_frames_sent +
port_stats->unicast_frames_sent;
stats->rx_bytes = port_stats->good_octets_received;
stats->tx_bytes = port_stats->good_octets_sent;
stats->rx_errors = port_stats->rx_error_frame_received;
stats->tx_errors = port_stats->mac_trans_error;
stats->rx_dropped = port_stats->buffer_overrun;
stats->tx_dropped = 0;
stats->multicast = port_stats->multicast_frames_received;
stats->collisions = port_stats->excessive_collision;
stats->rx_crc_errors = port_stats->bad_crc;
}
static void prestera_port_get_hw_stats(struct prestera_port *port)
{
prestera_hw_port_stats_get(port, &port->cached_hw_stats.stats);
}
static void prestera_port_stats_update(struct work_struct *work)
{
struct prestera_port *port =
container_of(work, struct prestera_port,
cached_hw_stats.caching_dw.work);
prestera_port_get_hw_stats(port);
queue_delayed_work(prestera_wq, &port->cached_hw_stats.caching_dw,
msecs_to_jiffies(PRESTERA_STATS_DELAY_MS));
}
static int prestera_port_setup_tc(struct net_device *dev,
enum tc_setup_type type,
void *type_data)
{
struct prestera_port *port = netdev_priv(dev);
switch (type) {
case TC_SETUP_BLOCK:
return prestera_flow_block_setup(port, type_data);
default:
return -EOPNOTSUPP;
}
}
static const struct net_device_ops prestera_netdev_ops = {
.ndo_open = prestera_port_open,
.ndo_stop = prestera_port_close,
.ndo_start_xmit = prestera_port_xmit,
.ndo_setup_tc = prestera_port_setup_tc,
.ndo_change_mtu = prestera_port_change_mtu,
.ndo_get_stats64 = prestera_port_get_stats64,
.ndo_set_mac_address = prestera_port_set_mac_address,
};
int prestera_port_autoneg_set(struct prestera_port *port, u64 link_modes)
{
int err;
if (port->autoneg && port->adver_link_modes == link_modes)
return 0;
err = prestera_hw_port_phy_mode_set(port, port->cfg_phy.admin,
true, 0, link_modes,
port->cfg_phy.mdix);
if (err)
return err;
port->adver_fec = BIT(PRESTERA_PORT_FEC_OFF);
port->adver_link_modes = link_modes;
port->cfg_phy.mode = 0;
port->autoneg = true;
return 0;
}
static void prestera_port_list_add(struct prestera_port *port)
{
write_lock(&port->sw->port_list_lock);
list_add(&port->list, &port->sw->port_list);
write_unlock(&port->sw->port_list_lock);
}
static void prestera_port_list_del(struct prestera_port *port)
{
write_lock(&port->sw->port_list_lock);
list_del(&port->list);
write_unlock(&port->sw->port_list_lock);
}
static int prestera_port_create(struct prestera_switch *sw, u32 id)
{
struct prestera_port_mac_config cfg_mac;
struct prestera_port *port;
struct net_device *dev;
int err;
dev = alloc_etherdev(sizeof(*port));
if (!dev)
return -ENOMEM;
port = netdev_priv(dev);
INIT_LIST_HEAD(&port->vlans_list);
port->pvid = PRESTERA_DEFAULT_VID;
port->lag = NULL;
port->dev = dev;
port->id = id;
port->sw = sw;
spin_lock_init(&port->state_mac_lock);
err = prestera_hw_port_info_get(port, &port->dev_id, &port->hw_id,
&port->fp_id);
if (err) {
dev_err(prestera_dev(sw), "Failed to get port(%u) info\n", id);
goto err_port_info_get;
}
err = prestera_devlink_port_register(port);
if (err)
goto err_dl_port_register;
dev->features |= NETIF_F_HW_TC;
dev->netns_immutable = true;
dev->netdev_ops = &prestera_netdev_ops;
dev->ethtool_ops = &prestera_ethtool_ops;
SET_NETDEV_DEV(dev, sw->dev->dev);
SET_NETDEV_DEVLINK_PORT(dev, &port->dl_port);
if (port->caps.transceiver != PRESTERA_PORT_TCVR_SFP)
netif_carrier_off(dev);
dev->mtu = min_t(unsigned int, sw->mtu_max, PRESTERA_MTU_DEFAULT);
dev->min_mtu = sw->mtu_min;
dev->max_mtu = sw->mtu_max;
err = prestera_hw_port_mtu_set(port, dev->mtu);
if (err) {
dev_err(prestera_dev(sw), "Failed to set port(%u) mtu(%d)\n",
id, dev->mtu);
goto err_port_init;
}
if (port->fp_id >= PRESTERA_MAC_ADDR_NUM_MAX) {
err = -EINVAL;
goto err_port_init;
}
eth_hw_addr_gen(dev, sw->base_mac, port->fp_id);
if (memcmp(dev->dev_addr, sw->base_mac, ETH_ALEN - 1)) {
dev_warn(prestera_dev(sw), "Port MAC address wraps for port(%u)\n", id);
dev_addr_mod(dev, 0, sw->base_mac, ETH_ALEN - 1);
}
err = prestera_hw_port_mac_set(port, dev->dev_addr);
if (err) {
dev_err(prestera_dev(sw), "Failed to set port(%u) mac addr\n", id);
goto err_port_init;
}
err = prestera_hw_port_cap_get(port, &port->caps);
if (err) {
dev_err(prestera_dev(sw), "Failed to get port(%u) caps\n", id);
goto err_port_init;
}
port->adver_link_modes = port->caps.supp_link_modes;
port->adver_fec = 0;
port->autoneg = true;
if (port->caps.transceiver != PRESTERA_PORT_TCVR_SFP) {
cfg_mac.admin = true;
cfg_mac.mode = PRESTERA_MAC_MODE_INTERNAL;
} else {
cfg_mac.admin = false;
cfg_mac.mode = PRESTERA_MAC_MODE_MAX;
}
cfg_mac.inband = 0;
cfg_mac.speed = 0;
cfg_mac.duplex = DUPLEX_UNKNOWN;
cfg_mac.fec = PRESTERA_PORT_FEC_OFF;
err = prestera_port_cfg_mac_write(port, &cfg_mac);
if (err) {
dev_err(prestera_dev(sw),
"Failed to set port(%u) mac mode\n", id);
goto err_port_init;
}
if (port->caps.transceiver != PRESTERA_PORT_TCVR_SFP) {
port->cfg_phy.mdix = ETH_TP_MDI_AUTO;
port->cfg_phy.admin = false;
err = prestera_hw_port_phy_mode_set(port,
port->cfg_phy.admin,
false, 0, 0,
port->cfg_phy.mdix);
if (err) {
dev_err(prestera_dev(sw),
"Failed to set port(%u) phy mode\n", id);
goto err_port_init;
}
}
err = prestera_rxtx_port_init(port);
if (err)
goto err_port_init;
INIT_DELAYED_WORK(&port->cached_hw_stats.caching_dw,
&prestera_port_stats_update);
prestera_port_list_add(port);
err = register_netdev(dev);
if (err)
goto err_register_netdev;
err = prestera_port_sfp_bind(port);
if (err)
goto err_sfp_bind;
return 0;
err_sfp_bind:
unregister_netdev(dev);
err_register_netdev:
prestera_port_list_del(port);
err_port_init:
prestera_devlink_port_unregister(port);
err_dl_port_register:
err_port_info_get:
free_netdev(dev);
return err;
}
static void prestera_port_destroy(struct prestera_port *port)
{
struct net_device *dev = port->dev;
cancel_delayed_work_sync(&port->cached_hw_stats.caching_dw);
unregister_netdev(dev);
prestera_port_list_del(port);
prestera_devlink_port_unregister(port);
free_netdev(dev);
}
static void prestera_destroy_ports(struct prestera_switch *sw)
{
struct prestera_port *port, *tmp;
list_for_each_entry_safe(port, tmp, &sw->port_list, list)
prestera_port_destroy(port);
}
static int prestera_create_ports(struct prestera_switch *sw)
{
struct prestera_port *port, *tmp;
u32 port_idx;
int err;
for (port_idx = 0; port_idx < sw->port_count; port_idx++) {
err = prestera_port_create(sw, port_idx);
if (err)
goto err_port_create;
}
return 0;
err_port_create:
list_for_each_entry_safe(port, tmp, &sw->port_list, list) {
prestera_port_sfp_unbind(port);
prestera_port_destroy(port);
}
return err;
}
static void prestera_port_handle_event(struct prestera_switch *sw,
struct prestera_event *evt, void *arg)
{
struct prestera_port_mac_state smac;
struct prestera_port_event *pevt;
struct delayed_work *caching_dw;
struct prestera_port *port;
if (evt->id == PRESTERA_PORT_EVENT_MAC_STATE_CHANGED) {
pevt = &evt->port_evt;
port = prestera_find_port(sw, pevt->port_id);
if (!port || !port->dev)
return;
caching_dw = &port->cached_hw_stats.caching_dw;
memset(&smac, 0, sizeof(smac));
smac.valid = true;
smac.oper = pevt->data.mac.oper;
if (smac.oper) {
smac.mode = pevt->data.mac.mode;
smac.speed = pevt->data.mac.speed;
smac.duplex = pevt->data.mac.duplex;
smac.fc = pevt->data.mac.fc;
smac.fec = pevt->data.mac.fec;
}
prestera_port_mac_state_cache_write(port, &smac);
if (port->state_mac.oper) {
if (port->phy_link)
phylink_pcs_change(&port->phylink_pcs, true);
else
netif_carrier_on(port->dev);
if (!delayed_work_pending(caching_dw))
queue_delayed_work(prestera_wq, caching_dw, 0);
} else {
if (port->phy_link)
phylink_pcs_change(&port->phylink_pcs, false);
else if (netif_running(port->dev) && netif_carrier_ok(port->dev))
netif_carrier_off(port->dev);
if (delayed_work_pending(caching_dw))
cancel_delayed_work(caching_dw);
}
}
}
static int prestera_event_handlers_register(struct prestera_switch *sw)
{
return prestera_hw_event_handler_register(sw, PRESTERA_EVENT_TYPE_PORT,
prestera_port_handle_event,
NULL);
}
static void prestera_event_handlers_unregister(struct prestera_switch *sw)
{
prestera_hw_event_handler_unregister(sw, PRESTERA_EVENT_TYPE_PORT,
prestera_port_handle_event);
}
static int prestera_switch_set_base_mac_addr(struct prestera_switch *sw)
{
int ret;
if (sw->np)
ret = of_get_mac_address(sw->np, sw->base_mac);
if (!is_valid_ether_addr(sw->base_mac) || ret) {
eth_random_addr(sw->base_mac);
dev_info(prestera_dev(sw), "using random base mac address\n");
}
return prestera_hw_switch_mac_set(sw, sw->base_mac);
}
struct prestera_lag *prestera_lag_by_id(struct prestera_switch *sw, u16 id)
{
return id < sw->lag_max ? &sw->lags[id] : NULL;
}
static struct prestera_lag *prestera_lag_by_dev(struct prestera_switch *sw,
struct net_device *dev)
{
struct prestera_lag *lag;
u16 id;
for (id = 0; id < sw->lag_max; id++) {
lag = &sw->lags[id];
if (lag->dev == dev)
return lag;
}
return NULL;
}
int prestera_lag_id(struct prestera_switch *sw,
struct net_device *lag_dev, u16 *lag_id)
{
struct prestera_lag *lag;
int free_id = -1;
int id;
for (id = 0; id < sw->lag_max; id++) {
lag = prestera_lag_by_id(sw, id);
if (lag->member_count) {
if (lag->dev == lag_dev) {
*lag_id = id;
return 0;
}
} else if (free_id < 0) {
free_id = id;
}
}
if (free_id < 0)
return -ENOSPC;
*lag_id = free_id;
return 0;
}
static struct prestera_lag *prestera_lag_create(struct prestera_switch *sw,
struct net_device *lag_dev)
{
struct prestera_lag *lag = NULL;
u16 id;
for (id = 0; id < sw->lag_max; id++) {
lag = &sw->lags[id];
if (!lag->dev)
break;
}
if (lag) {
INIT_LIST_HEAD(&lag->members);
lag->dev = lag_dev;
}
return lag;
}
static void prestera_lag_destroy(struct prestera_switch *sw,
struct prestera_lag *lag)
{
WARN_ON(!list_empty(&lag->members));
lag->member_count = 0;
lag->dev = NULL;
}
static int prestera_lag_port_add(struct prestera_port *port,
struct net_device *lag_dev)
{
struct prestera_switch *sw = port->sw;
struct prestera_lag *lag;
int err;
lag = prestera_lag_by_dev(sw, lag_dev);
if (!lag) {
lag = prestera_lag_create(sw, lag_dev);
if (!lag)
return -ENOSPC;
}
if (lag->member_count >= sw->lag_member_max)
return -ENOSPC;
err = prestera_hw_lag_member_add(port, lag->lag_id);
if (err) {
if (!lag->member_count)
prestera_lag_destroy(sw, lag);
return err;
}
list_add(&port->lag_member, &lag->members);
lag->member_count++;
port->lag = lag;
return 0;
}
static int prestera_lag_port_del(struct prestera_port *port)
{
struct prestera_switch *sw = port->sw;
struct prestera_lag *lag = port->lag;
int err;
if (!lag || !lag->member_count)
return -EINVAL;
err = prestera_hw_lag_member_del(port, lag->lag_id);
if (err)
return err;
list_del(&port->lag_member);
lag->member_count--;
port->lag = NULL;
if (netif_is_bridge_port(lag->dev)) {
struct net_device *br_dev;
br_dev = netdev_master_upper_dev_get(lag->dev);
prestera_bridge_port_leave(br_dev, port);
}
if (!lag->member_count)
prestera_lag_destroy(sw, lag);
return 0;
}
bool prestera_port_is_lag_member(const struct prestera_port *port)
{
return !!port->lag;
}
u16 prestera_port_lag_id(const struct prestera_port *port)
{
return port->lag->lag_id;
}
static int prestera_lag_init(struct prestera_switch *sw)
{
u16 id;
sw->lags = kzalloc_objs(*sw->lags, sw->lag_max);
if (!sw->lags)
return -ENOMEM;
for (id = 0; id < sw->lag_max; id++)
sw->lags[id].lag_id = id;
return 0;
}
static void prestera_lag_fini(struct prestera_switch *sw)
{
u8 idx;
for (idx = 0; idx < sw->lag_max; idx++)
WARN_ON(sw->lags[idx].member_count);
kfree(sw->lags);
}
bool prestera_netdev_check(const struct net_device *dev)
{
return dev->netdev_ops == &prestera_netdev_ops;
}
static int prestera_lower_dev_walk(struct net_device *dev,
struct netdev_nested_priv *priv)
{
struct prestera_port **pport = (struct prestera_port **)priv->data;
if (prestera_netdev_check(dev)) {
*pport = netdev_priv(dev);
return 1;
}
return 0;
}
struct prestera_port *prestera_port_dev_lower_find(struct net_device *dev)
{
struct prestera_port *port = NULL;
struct netdev_nested_priv priv = {
.data = (void *)&port,
};
if (prestera_netdev_check(dev))
return netdev_priv(dev);
netdev_walk_all_lower_dev(dev, prestera_lower_dev_walk, &priv);
return port;
}
static int prestera_netdev_port_lower_event(struct net_device *dev,
unsigned long event, void *ptr)
{
struct netdev_notifier_changelowerstate_info *info = ptr;
struct netdev_lag_lower_state_info *lower_state_info;
struct prestera_port *port = netdev_priv(dev);
bool enabled;
if (!netif_is_lag_port(dev))
return 0;
if (!prestera_port_is_lag_member(port))
return 0;
lower_state_info = info->lower_state_info;
enabled = lower_state_info->link_up && lower_state_info->tx_enabled;
return prestera_hw_lag_member_enable(port, port->lag->lag_id, enabled);
}
static bool prestera_lag_master_check(struct net_device *lag_dev,
struct netdev_lag_upper_info *info,
struct netlink_ext_ack *ext_ack)
{
if (info->tx_type != NETDEV_LAG_TX_TYPE_HASH) {
NL_SET_ERR_MSG_MOD(ext_ack, "Unsupported LAG Tx type");
return false;
}
return true;
}
static int prestera_netdev_port_event(struct net_device *lower,
struct net_device *dev,
unsigned long event, void *ptr)
{
struct netdev_notifier_info *info = ptr;
struct netdev_notifier_changeupper_info *cu_info;
struct prestera_port *port = netdev_priv(dev);
struct netlink_ext_ack *extack;
struct net_device *upper;
extack = netdev_notifier_info_to_extack(info);
cu_info = container_of(info,
struct netdev_notifier_changeupper_info,
info);
switch (event) {
case NETDEV_PRECHANGEUPPER:
upper = cu_info->upper_dev;
if (!netif_is_bridge_master(upper) &&
!netif_is_lag_master(upper)) {
NL_SET_ERR_MSG_MOD(extack, "Unknown upper device type");
return -EINVAL;
}
if (!cu_info->linking)
break;
if (netdev_has_any_upper_dev(upper)) {
NL_SET_ERR_MSG_MOD(extack, "Upper device is already enslaved");
return -EINVAL;
}
if (netif_is_lag_master(upper) &&
!prestera_lag_master_check(upper, cu_info->upper_info, extack))
return -EOPNOTSUPP;
if (netif_is_lag_master(upper) && vlan_uses_dev(dev)) {
NL_SET_ERR_MSG_MOD(extack,
"Master device is a LAG master and port has a VLAN");
return -EINVAL;
}
if (netif_is_lag_port(dev) && is_vlan_dev(upper) &&
!netif_is_lag_master(vlan_dev_real_dev(upper))) {
NL_SET_ERR_MSG_MOD(extack,
"Can not put a VLAN on a LAG port");
return -EINVAL;
}
break;
case NETDEV_CHANGEUPPER:
upper = cu_info->upper_dev;
if (netif_is_bridge_master(upper)) {
if (cu_info->linking)
return prestera_bridge_port_join(upper, port,
extack);
else
prestera_bridge_port_leave(upper, port);
} else if (netif_is_lag_master(upper)) {
if (cu_info->linking)
return prestera_lag_port_add(port, upper);
else
prestera_lag_port_del(port);
}
break;
case NETDEV_CHANGELOWERSTATE:
return prestera_netdev_port_lower_event(dev, event, ptr);
}
return 0;
}
static int prestera_netdevice_lag_event(struct net_device *lag_dev,
unsigned long event, void *ptr)
{
struct net_device *dev;
struct list_head *iter;
int err;
netdev_for_each_lower_dev(lag_dev, dev, iter) {
if (prestera_netdev_check(dev)) {
err = prestera_netdev_port_event(lag_dev, dev, event,
ptr);
if (err)
return err;
}
}
return 0;
}
static int prestera_netdev_event_handler(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
int err = 0;
if (prestera_netdev_check(dev))
err = prestera_netdev_port_event(dev, dev, event, ptr);
else if (netif_is_lag_master(dev))
err = prestera_netdevice_lag_event(dev, event, ptr);
return notifier_from_errno(err);
}
struct prestera_mdb_entry *
prestera_mdb_entry_create(struct prestera_switch *sw,
const unsigned char *addr, u16 vid)
{
struct prestera_flood_domain *flood_domain;
struct prestera_mdb_entry *mdb_entry;
mdb_entry = kzalloc_obj(*mdb_entry);
if (!mdb_entry)
goto err_mdb_alloc;
flood_domain = prestera_flood_domain_create(sw);
if (!flood_domain)
goto err_flood_domain_create;
mdb_entry->sw = sw;
mdb_entry->vid = vid;
mdb_entry->flood_domain = flood_domain;
ether_addr_copy(mdb_entry->addr, addr);
if (prestera_hw_mdb_create(mdb_entry))
goto err_mdb_hw_create;
return mdb_entry;
err_mdb_hw_create:
prestera_flood_domain_destroy(flood_domain);
err_flood_domain_create:
kfree(mdb_entry);
err_mdb_alloc:
return NULL;
}
void prestera_mdb_entry_destroy(struct prestera_mdb_entry *mdb_entry)
{
prestera_hw_mdb_destroy(mdb_entry);
prestera_flood_domain_destroy(mdb_entry->flood_domain);
kfree(mdb_entry);
}
struct prestera_flood_domain *
prestera_flood_domain_create(struct prestera_switch *sw)
{
struct prestera_flood_domain *domain;
domain = kzalloc_obj(*domain);
if (!domain)
return NULL;
domain->sw = sw;
if (prestera_hw_flood_domain_create(domain)) {
kfree(domain);
return NULL;
}
INIT_LIST_HEAD(&domain->flood_domain_port_list);
return domain;
}
void prestera_flood_domain_destroy(struct prestera_flood_domain *flood_domain)
{
WARN_ON(!list_empty(&flood_domain->flood_domain_port_list));
WARN_ON_ONCE(prestera_hw_flood_domain_destroy(flood_domain));
kfree(flood_domain);
}
int
prestera_flood_domain_port_create(struct prestera_flood_domain *flood_domain,
struct net_device *dev,
u16 vid)
{
struct prestera_flood_domain_port *flood_domain_port;
bool is_first_port_in_list = false;
int err;
flood_domain_port = kzalloc_obj(*flood_domain_port);
if (!flood_domain_port) {
err = -ENOMEM;
goto err_port_alloc;
}
flood_domain_port->vid = vid;
if (list_empty(&flood_domain->flood_domain_port_list))
is_first_port_in_list = true;
list_add(&flood_domain_port->flood_domain_port_node,
&flood_domain->flood_domain_port_list);
flood_domain_port->flood_domain = flood_domain;
flood_domain_port->dev = dev;
if (!is_first_port_in_list) {
err = prestera_hw_flood_domain_ports_reset(flood_domain);
if (err)
goto err_prestera_mdb_port_create_hw;
}
err = prestera_hw_flood_domain_ports_set(flood_domain);
if (err)
goto err_prestera_mdb_port_create_hw;
return 0;
err_prestera_mdb_port_create_hw:
list_del(&flood_domain_port->flood_domain_port_node);
kfree(flood_domain_port);
err_port_alloc:
return err;
}
void
prestera_flood_domain_port_destroy(struct prestera_flood_domain_port *port)
{
struct prestera_flood_domain *flood_domain = port->flood_domain;
list_del(&port->flood_domain_port_node);
WARN_ON_ONCE(prestera_hw_flood_domain_ports_reset(flood_domain));
if (!list_empty(&flood_domain->flood_domain_port_list))
WARN_ON_ONCE(prestera_hw_flood_domain_ports_set(flood_domain));
kfree(port);
}
struct prestera_flood_domain_port *
prestera_flood_domain_port_find(struct prestera_flood_domain *flood_domain,
struct net_device *dev, u16 vid)
{
struct prestera_flood_domain_port *flood_domain_port;
list_for_each_entry(flood_domain_port,
&flood_domain->flood_domain_port_list,
flood_domain_port_node)
if (flood_domain_port->dev == dev &&
vid == flood_domain_port->vid)
return flood_domain_port;
return NULL;
}
static int prestera_netdev_event_handler_register(struct prestera_switch *sw)
{
sw->netdev_nb.notifier_call = prestera_netdev_event_handler;
return register_netdevice_notifier(&sw->netdev_nb);
}
static void prestera_netdev_event_handler_unregister(struct prestera_switch *sw)
{
unregister_netdevice_notifier(&sw->netdev_nb);
}
static int prestera_switch_init(struct prestera_switch *sw)
{
int err;
sw->np = sw->dev->dev->of_node;
err = prestera_hw_switch_init(sw);
if (err) {
dev_err(prestera_dev(sw), "Failed to init Switch device\n");
return err;
}
rwlock_init(&sw->port_list_lock);
INIT_LIST_HEAD(&sw->port_list);
err = prestera_switch_set_base_mac_addr(sw);
if (err)
return err;
err = prestera_netdev_event_handler_register(sw);
if (err)
return err;
err = prestera_router_init(sw);
if (err)
goto err_router_init;
err = prestera_switchdev_init(sw);
if (err)
goto err_swdev_register;
err = prestera_rxtx_switch_init(sw);
if (err)
goto err_rxtx_register;
err = prestera_event_handlers_register(sw);
if (err)
goto err_handlers_register;
err = prestera_counter_init(sw);
if (err)
goto err_counter_init;
err = prestera_acl_init(sw);
if (err)
goto err_acl_init;
err = prestera_span_init(sw);
if (err)
goto err_span_init;
err = prestera_devlink_traps_register(sw);
if (err)
goto err_dl_register;
err = prestera_lag_init(sw);
if (err)
goto err_lag_init;
err = prestera_create_ports(sw);
if (err)
goto err_ports_create;
prestera_devlink_register(sw);
return 0;
err_ports_create:
prestera_lag_fini(sw);
err_lag_init:
prestera_devlink_traps_unregister(sw);
err_dl_register:
prestera_span_fini(sw);
err_span_init:
prestera_acl_fini(sw);
err_acl_init:
prestera_counter_fini(sw);
err_counter_init:
prestera_event_handlers_unregister(sw);
err_handlers_register:
prestera_rxtx_switch_fini(sw);
err_rxtx_register:
prestera_switchdev_fini(sw);
err_swdev_register:
prestera_router_fini(sw);
err_router_init:
prestera_netdev_event_handler_unregister(sw);
prestera_hw_switch_fini(sw);
return err;
}
static void prestera_switch_fini(struct prestera_switch *sw)
{
prestera_devlink_unregister(sw);
prestera_destroy_ports(sw);
prestera_lag_fini(sw);
prestera_devlink_traps_unregister(sw);
prestera_span_fini(sw);
prestera_acl_fini(sw);
prestera_counter_fini(sw);
prestera_event_handlers_unregister(sw);
prestera_rxtx_switch_fini(sw);
prestera_switchdev_fini(sw);
prestera_router_fini(sw);
prestera_netdev_event_handler_unregister(sw);
prestera_hw_switch_fini(sw);
of_node_put(sw->np);
}
int prestera_device_register(struct prestera_device *dev)
{
struct prestera_switch *sw;
int err;
sw = prestera_devlink_alloc(dev);
if (!sw)
return -ENOMEM;
dev->priv = sw;
sw->dev = dev;
err = prestera_switch_init(sw);
if (err) {
prestera_devlink_free(sw);
return err;
}
return 0;
}
EXPORT_SYMBOL(prestera_device_register);
void prestera_device_unregister(struct prestera_device *dev)
{
struct prestera_switch *sw = dev->priv;
prestera_switch_fini(sw);
prestera_devlink_free(sw);
}
EXPORT_SYMBOL(prestera_device_unregister);
static int __init prestera_module_init(void)
{
prestera_wq = alloc_workqueue("prestera", WQ_PERCPU, 0);
if (!prestera_wq)
return -ENOMEM;
prestera_owq = alloc_ordered_workqueue("prestera_ordered", 0);
if (!prestera_owq) {
destroy_workqueue(prestera_wq);
return -ENOMEM;
}
return 0;
}
static void __exit prestera_module_exit(void)
{
destroy_workqueue(prestera_wq);
destroy_workqueue(prestera_owq);
}
module_init(prestera_module_init);
module_exit(prestera_module_exit);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("Marvell Prestera switch driver");
