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port.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Handling of a single switch port
*
* Copyright (c) 2017 Savoir-faire Linux Inc.
* Vivien Didelot <[email protected]>
*/
#include <linux/if_bridge.h>
#include <linux/notifier.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include "dsa_priv.h"
/**
* dsa_port_notify - Notify the switching fabric of changes to a port
* @dp: port on which change occurred
* @e: event, must be of type DSA_NOTIFIER_*
* @v: event-specific value.
*
* Notify all switches in the DSA tree that this port's switch belongs to,
* including this switch itself, of an event. Allows the other switches to
* reconfigure themselves for cross-chip operations. Can also be used to
* reconfigure ports without net_devices (CPU ports, DSA links) whenever
* a user port's state changes.
*/
static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v)
{
return dsa_tree_notify(dp->ds->dst, e, v);
}
int dsa_port_set_state(struct dsa_port *dp, u8 state)
{
struct dsa_switch *ds = dp->ds;
int port = dp->index;
if (!ds->ops->port_stp_state_set)
return -EOPNOTSUPP;
ds->ops->port_stp_state_set(ds, port, state);
if (ds->ops->port_fast_age) {
/* Fast age FDB entries or flush appropriate forwarding database
* for the given port, if we are moving it from Learning or
* Forwarding state, to Disabled or Blocking or Listening state.
*/
if ((dp->stp_state == BR_STATE_LEARNING ||
dp->stp_state == BR_STATE_FORWARDING) &&
(state == BR_STATE_DISABLED ||
state == BR_STATE_BLOCKING ||
state == BR_STATE_LISTENING))
ds->ops->port_fast_age(ds, port);
}
dp->stp_state = state;
return 0;
}
static void dsa_port_set_state_now(struct dsa_port *dp, u8 state)
{
int err;
err = dsa_port_set_state(dp, state);
if (err)
pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
}
int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy)
{
struct dsa_switch *ds = dp->ds;
int port = dp->index;
int err;
if (ds->ops->port_enable) {
err = ds->ops->port_enable(ds, port, phy);
if (err)
return err;
}
if (!dp->bridge_dev)
dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
if (dp->pl)
phylink_start(dp->pl);
return 0;
}
int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy)
{
int err;
rtnl_lock();
err = dsa_port_enable_rt(dp, phy);
rtnl_unlock();
return err;
}
void dsa_port_disable_rt(struct dsa_port *dp)
{
struct dsa_switch *ds = dp->ds;
int port = dp->index;
if (dp->pl)
phylink_stop(dp->pl);
if (!dp->bridge_dev)
dsa_port_set_state_now(dp, BR_STATE_DISABLED);
if (ds->ops->port_disable)
ds->ops->port_disable(ds, port);
}
void dsa_port_disable(struct dsa_port *dp)
{
rtnl_lock();
dsa_port_disable_rt(dp);
rtnl_unlock();
}
static int dsa_port_inherit_brport_flags(struct dsa_port *dp,
struct netlink_ext_ack *extack)
{
const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
BR_BCAST_FLOOD;
struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
int flag, err;
for_each_set_bit(flag, &mask, 32) {
struct switchdev_brport_flags flags = {0};
flags.mask = BIT(flag);
if (br_port_flag_is_set(brport_dev, BIT(flag)))
flags.val = BIT(flag);
err = dsa_port_bridge_flags(dp, flags, extack);
if (err && err != -EOPNOTSUPP)
return err;
}
return 0;
}
static void dsa_port_clear_brport_flags(struct dsa_port *dp)
{
const unsigned long val = BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
BR_BCAST_FLOOD;
int flag, err;
for_each_set_bit(flag, &mask, 32) {
struct switchdev_brport_flags flags = {0};
flags.mask = BIT(flag);
flags.val = val & BIT(flag);
err = dsa_port_bridge_flags(dp, flags, NULL);
if (err && err != -EOPNOTSUPP)
dev_err(dp->ds->dev,
"failed to clear bridge port flag %lu: %pe\n",
flags.val, ERR_PTR(err));
}
}
static int dsa_port_switchdev_sync(struct dsa_port *dp,
struct netlink_ext_ack *extack)
{
struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
struct net_device *br = dp->bridge_dev;
int err;
err = dsa_port_inherit_brport_flags(dp, extack);
if (err)
return err;
err = dsa_port_set_state(dp, br_port_get_stp_state(brport_dev));
if (err && err != -EOPNOTSUPP)
return err;
err = dsa_port_vlan_filtering(dp, br_vlan_enabled(br), extack);
if (err && err != -EOPNOTSUPP)
return err;
err = dsa_port_mrouter(dp->cpu_dp, br_multicast_router(br), extack);
if (err && err != -EOPNOTSUPP)
return err;
err = dsa_port_ageing_time(dp, br_get_ageing_time(br));
if (err && err != -EOPNOTSUPP)
return err;
err = br_mdb_replay(br, brport_dev, dp, true,
&dsa_slave_switchdev_blocking_notifier, extack);
if (err && err != -EOPNOTSUPP)
return err;
/* Forwarding and termination FDB entries on the port */
err = br_fdb_replay(br, brport_dev, dp, true,
&dsa_slave_switchdev_notifier);
if (err && err != -EOPNOTSUPP)
return err;
/* Termination FDB entries on the bridge itself */
err = br_fdb_replay(br, br, dp, true, &dsa_slave_switchdev_notifier);
if (err && err != -EOPNOTSUPP)
return err;
err = br_vlan_replay(br, brport_dev, dp, true,
&dsa_slave_switchdev_blocking_notifier, extack);
if (err && err != -EOPNOTSUPP)
return err;
return 0;
}
static int dsa_port_switchdev_unsync_objs(struct dsa_port *dp,
struct net_device *br,
struct netlink_ext_ack *extack)
{
struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
int err;
/* Delete the switchdev objects left on this port */
err = br_mdb_replay(br, brport_dev, dp, false,
&dsa_slave_switchdev_blocking_notifier, extack);
if (err && err != -EOPNOTSUPP)
return err;
/* Forwarding and termination FDB entries on the port */
err = br_fdb_replay(br, brport_dev, dp, false,
&dsa_slave_switchdev_notifier);
if (err && err != -EOPNOTSUPP)
return err;
/* Termination FDB entries on the bridge itself */
err = br_fdb_replay(br, br, dp, false, &dsa_slave_switchdev_notifier);
if (err && err != -EOPNOTSUPP)
return err;
err = br_vlan_replay(br, brport_dev, dp, false,
&dsa_slave_switchdev_blocking_notifier, extack);
if (err && err != -EOPNOTSUPP)
return err;
return 0;
}
static void dsa_port_switchdev_unsync_attrs(struct dsa_port *dp)
{
/* Configure the port for standalone mode (no address learning,
* flood everything).
* The bridge only emits SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS events
* when the user requests it through netlink or sysfs, but not
* automatically at port join or leave, so we need to handle resetting
* the brport flags ourselves. But we even prefer it that way, because
* otherwise, some setups might never get the notification they need,
* for example, when a port leaves a LAG that offloads the bridge,
* it becomes standalone, but as far as the bridge is concerned, no
* port ever left.
*/
dsa_port_clear_brport_flags(dp);
/* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
* so allow it to be in BR_STATE_FORWARDING to be kept functional
*/
dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
/* VLAN filtering is handled by dsa_switch_bridge_leave */
/* Some drivers treat the notification for having a local multicast
* router by allowing multicast to be flooded to the CPU, so we should
* allow this in standalone mode too.
*/
dsa_port_mrouter(dp->cpu_dp, true, NULL);
/* Ageing time may be global to the switch chip, so don't change it
* here because we have no good reason (or value) to change it to.
*/
}
int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
struct netlink_ext_ack *extack)
{
struct dsa_notifier_bridge_info info = {
.tree_index = dp->ds->dst->index,
.sw_index = dp->ds->index,
.port = dp->index,
.br = br,
};
int err;
/* Here the interface is already bridged. Reflect the current
* configuration so that drivers can program their chips accordingly.
*/
dp->bridge_dev = br;
err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_JOIN, &info);
if (err)
goto out_rollback;
err = dsa_port_switchdev_sync(dp, extack);
if (err)
goto out_rollback_unbridge;
return 0;
out_rollback_unbridge:
dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
out_rollback:
dp->bridge_dev = NULL;
return err;
}
int dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br,
struct netlink_ext_ack *extack)
{
return dsa_port_switchdev_unsync_objs(dp, br, extack);
}
void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
{
struct dsa_notifier_bridge_info info = {
.tree_index = dp->ds->dst->index,
.sw_index = dp->ds->index,
.port = dp->index,
.br = br,
};
int err;
/* Here the port is already unbridged. Reflect the current configuration
* so that drivers can program their chips accordingly.
*/
dp->bridge_dev = NULL;
err = dsa_broadcast(DSA_NOTIFIER_BRIDGE_LEAVE, &info);
if (err)
pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n");
dsa_port_switchdev_unsync_attrs(dp);
}
int dsa_port_lag_change(struct dsa_port *dp,
struct netdev_lag_lower_state_info *linfo)
{
struct dsa_notifier_lag_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
};
bool tx_enabled;
if (!dp->lag_dev)
return 0;
/* On statically configured aggregates (e.g. loadbalance
* without LACP) ports will always be tx_enabled, even if the
* link is down. Thus we require both link_up and tx_enabled
* in order to include it in the tx set.
*/
tx_enabled = linfo->link_up && linfo->tx_enabled;
if (tx_enabled == dp->lag_tx_enabled)
return 0;
dp->lag_tx_enabled = tx_enabled;
return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info);
}
int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag,
struct netdev_lag_upper_info *uinfo,
struct netlink_ext_ack *extack)
{
struct dsa_notifier_lag_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.lag = lag,
.info = uinfo,
};
struct net_device *bridge_dev;
int err;
dsa_lag_map(dp->ds->dst, lag);
dp->lag_dev = lag;
err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info);
if (err)
goto err_lag_join;
bridge_dev = netdev_master_upper_dev_get(lag);
if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
return 0;
err = dsa_port_bridge_join(dp, bridge_dev, extack);
if (err)
goto err_bridge_join;
return 0;
err_bridge_join:
dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
err_lag_join:
dp->lag_dev = NULL;
dsa_lag_unmap(dp->ds->dst, lag);
return err;
}
int dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag,
struct netlink_ext_ack *extack)
{
if (dp->bridge_dev)
return dsa_port_pre_bridge_leave(dp, dp->bridge_dev, extack);
return 0;
}
void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag)
{
struct dsa_notifier_lag_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.lag = lag,
};
int err;
if (!dp->lag_dev)
return;
/* Port might have been part of a LAG that in turn was
* attached to a bridge.
*/
if (dp->bridge_dev)
dsa_port_bridge_leave(dp, dp->bridge_dev);
dp->lag_tx_enabled = false;
dp->lag_dev = NULL;
err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
if (err)
pr_err("DSA: failed to notify DSA_NOTIFIER_LAG_LEAVE: %d\n",
err);
dsa_lag_unmap(dp->ds->dst, lag);
}
/* Must be called under rcu_read_lock() */
static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp,
bool vlan_filtering,
struct netlink_ext_ack *extack)
{
struct dsa_switch *ds = dp->ds;
int err, i;
/* VLAN awareness was off, so the question is "can we turn it on".
* We may have had 8021q uppers, those need to go. Make sure we don't
* enter an inconsistent state: deny changing the VLAN awareness state
* as long as we have 8021q uppers.
*/
if (vlan_filtering && dsa_is_user_port(ds, dp->index)) {
struct net_device *upper_dev, *slave = dp->slave;
struct net_device *br = dp->bridge_dev;
struct list_head *iter;
netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
struct bridge_vlan_info br_info;
u16 vid;
if (!is_vlan_dev(upper_dev))
continue;
vid = vlan_dev_vlan_id(upper_dev);
/* br_vlan_get_info() returns -EINVAL or -ENOENT if the
* device, respectively the VID is not found, returning
* 0 means success, which is a failure for us here.
*/
err = br_vlan_get_info(br, vid, &br_info);
if (err == 0) {
NL_SET_ERR_MSG_MOD(extack,
"Must first remove VLAN uppers having VIDs also present in bridge");
return false;
}
}
}
if (!ds->vlan_filtering_is_global)
return true;
/* For cases where enabling/disabling VLAN awareness is global to the
* switch, we need to handle the case where multiple bridges span
* different ports of the same switch device and one of them has a
* different setting than what is being requested.
*/
for (i = 0; i < ds->num_ports; i++) {
struct net_device *other_bridge;
other_bridge = dsa_to_port(ds, i)->bridge_dev;
if (!other_bridge)
continue;
/* If it's the same bridge, it also has same
* vlan_filtering setting => no need to check
*/
if (other_bridge == dp->bridge_dev)
continue;
if (br_vlan_enabled(other_bridge) != vlan_filtering) {
NL_SET_ERR_MSG_MOD(extack,
"VLAN filtering is a global setting");
return false;
}
}
return true;
}
int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
struct netlink_ext_ack *extack)
{
struct dsa_switch *ds = dp->ds;
bool apply;
int err;
if (!ds->ops->port_vlan_filtering)
return -EOPNOTSUPP;
/* We are called from dsa_slave_switchdev_blocking_event(),
* which is not under rcu_read_lock(), unlike
* dsa_slave_switchdev_event().
*/
rcu_read_lock();
apply = dsa_port_can_apply_vlan_filtering(dp, vlan_filtering, extack);
rcu_read_unlock();
if (!apply)
return -EINVAL;
if (dsa_port_is_vlan_filtering(dp) == vlan_filtering)
return 0;
err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering,
extack);
if (err)
return err;
if (ds->vlan_filtering_is_global)
ds->vlan_filtering = vlan_filtering;
else
dp->vlan_filtering = vlan_filtering;
return 0;
}
/* This enforces legacy behavior for switch drivers which assume they can't
* receive VLAN configuration when enslaved to a bridge with vlan_filtering=0
*/
bool dsa_port_skip_vlan_configuration(struct dsa_port *dp)
{
struct dsa_switch *ds = dp->ds;
if (!dp->bridge_dev)
return false;
return (!ds->configure_vlan_while_not_filtering &&
!br_vlan_enabled(dp->bridge_dev));
}
int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock)
{
unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
struct dsa_notifier_ageing_time_info info;
int err;
info.ageing_time = ageing_time;
err = dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
if (err)
return err;
dp->ageing_time = ageing_time;
return 0;
}
int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
struct switchdev_brport_flags flags,
struct netlink_ext_ack *extack)
{
struct dsa_switch *ds = dp->ds;
if (!ds->ops->port_pre_bridge_flags)
return -EINVAL;
return ds->ops->port_pre_bridge_flags(ds, dp->index, flags, extack);
}
int dsa_port_bridge_flags(const struct dsa_port *dp,
struct switchdev_brport_flags flags,
struct netlink_ext_ack *extack)
{
struct dsa_switch *ds = dp->ds;
if (!ds->ops->port_bridge_flags)
return -EOPNOTSUPP;
return ds->ops->port_bridge_flags(ds, dp->index, flags, extack);
}
int dsa_port_mrouter(struct dsa_port *dp, bool mrouter,
struct netlink_ext_ack *extack)
{
struct dsa_switch *ds = dp->ds;
if (!ds->ops->port_set_mrouter)
return -EOPNOTSUPP;
return ds->ops->port_set_mrouter(ds, dp->index, mrouter, extack);
}
int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
bool targeted_match)
{
struct dsa_notifier_mtu_info info = {
.sw_index = dp->ds->index,
.targeted_match = targeted_match,
.port = dp->index,
.mtu = new_mtu,
};
return dsa_port_notify(dp, DSA_NOTIFIER_MTU, &info);
}
int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
u16 vid)
{
struct dsa_notifier_fdb_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.addr = addr,
.vid = vid,
};
return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
}
int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
u16 vid)
{
struct dsa_notifier_fdb_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.addr = addr,
.vid = vid,
};
return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
}
int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
u16 vid)
{
struct dsa_notifier_fdb_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.addr = addr,
.vid = vid,
};
struct dsa_port *cpu_dp = dp->cpu_dp;
int err;
err = dev_uc_add(cpu_dp->master, addr);
if (err)
return err;
return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info);
}
int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
u16 vid)
{
struct dsa_notifier_fdb_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.addr = addr,
.vid = vid,
};
struct dsa_port *cpu_dp = dp->cpu_dp;
int err;
err = dev_uc_del(cpu_dp->master, addr);
if (err)
return err;
return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info);
}
int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
{
struct dsa_switch *ds = dp->ds;
int port = dp->index;
if (!ds->ops->port_fdb_dump)
return -EOPNOTSUPP;
return ds->ops->port_fdb_dump(ds, port, cb, data);
}
int dsa_port_mdb_add(const struct dsa_port *dp,
const struct switchdev_obj_port_mdb *mdb)
{
struct dsa_notifier_mdb_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.mdb = mdb,
};
return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
}
int dsa_port_mdb_del(const struct dsa_port *dp,
const struct switchdev_obj_port_mdb *mdb)
{
struct dsa_notifier_mdb_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.mdb = mdb,
};
return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
}
int dsa_port_host_mdb_add(const struct dsa_port *dp,
const struct switchdev_obj_port_mdb *mdb)
{
struct dsa_notifier_mdb_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.mdb = mdb,
};
struct dsa_port *cpu_dp = dp->cpu_dp;
int err;
err = dev_mc_add(cpu_dp->master, mdb->addr);
if (err)
return err;
return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info);
}
int dsa_port_host_mdb_del(const struct dsa_port *dp,
const struct switchdev_obj_port_mdb *mdb)
{
struct dsa_notifier_mdb_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.mdb = mdb,
};
struct dsa_port *cpu_dp = dp->cpu_dp;
int err;
err = dev_mc_del(cpu_dp->master, mdb->addr);
if (err)
return err;
return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info);
}
int dsa_port_vlan_add(struct dsa_port *dp,
const struct switchdev_obj_port_vlan *vlan,
struct netlink_ext_ack *extack)
{
struct dsa_notifier_vlan_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.vlan = vlan,
.extack = extack,
};
return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
}
int dsa_port_vlan_del(struct dsa_port *dp,
const struct switchdev_obj_port_vlan *vlan)
{
struct dsa_notifier_vlan_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.vlan = vlan,
};
return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
}
int dsa_port_mrp_add(const struct dsa_port *dp,
const struct switchdev_obj_mrp *mrp)
{
struct dsa_notifier_mrp_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.mrp = mrp,
};
return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD, &info);
}
int dsa_port_mrp_del(const struct dsa_port *dp,
const struct switchdev_obj_mrp *mrp)
{
struct dsa_notifier_mrp_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.mrp = mrp,
};
return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL, &info);
}
int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
const struct switchdev_obj_ring_role_mrp *mrp)
{
struct dsa_notifier_mrp_ring_role_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.mrp = mrp,
};
return dsa_port_notify(dp, DSA_NOTIFIER_MRP_ADD_RING_ROLE, &info);
}
int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
const struct switchdev_obj_ring_role_mrp *mrp)
{
struct dsa_notifier_mrp_ring_role_info info = {
.sw_index = dp->ds->index,
.port = dp->index,
.mrp = mrp,
};
return dsa_port_notify(dp, DSA_NOTIFIER_MRP_DEL_RING_ROLE, &info);
}
void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
const struct dsa_device_ops *tag_ops)
{
cpu_dp->filter = tag_ops->filter;
cpu_dp->rcv = tag_ops->rcv;
cpu_dp->tag_ops = tag_ops;
}
static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
{
struct device_node *phy_dn;
struct phy_device *phydev;
phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
if (!phy_dn)
return NULL;
phydev = of_phy_find_device(phy_dn);
if (!phydev) {
of_node_put(phy_dn);
return ERR_PTR(-EPROBE_DEFER);
}
of_node_put(phy_dn);
return phydev;
}
static void dsa_port_phylink_validate(struct phylink_config *config,
unsigned long *supported,
struct phylink_link_state *state)
{
struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
struct dsa_switch *ds = dp->ds;
if (!ds->ops->phylink_validate)
return;
ds->ops->phylink_validate(ds, dp->index, supported, state);
}
static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config,
struct phylink_link_state *state)
{
struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
struct dsa_switch *ds = dp->ds;
int err;
/* Only called for inband modes */
if (!ds->ops->phylink_mac_link_state) {
state->link = 0;
return;
}
err = ds->ops->phylink_mac_link_state(ds, dp->index, state);
if (err < 0) {
dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n",
dp->index, err);
state->link = 0;
}
}
static void dsa_port_phylink_mac_config(struct phylink_config *config,
unsigned int mode,
const struct phylink_link_state *state)
{
struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
struct dsa_switch *ds = dp->ds;
if (!ds->ops->phylink_mac_config)
return;
ds->ops->phylink_mac_config(ds, dp->index, mode, state);
}
static void dsa_port_phylink_mac_an_restart(struct phylink_config *config)
{
struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
struct dsa_switch *ds = dp->ds;
if (!ds->ops->phylink_mac_an_restart)
return;
ds->ops->phylink_mac_an_restart(ds, dp->index);
}
static void dsa_port_phylink_mac_link_down(struct phylink_config *config,
unsigned int mode,
phy_interface_t interface)
{
struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
struct phy_device *phydev = NULL;
struct dsa_switch *ds = dp->ds;
if (dsa_is_user_port(ds, dp->index))
phydev = dp->slave->phydev;
if (!ds->ops->phylink_mac_link_down) {
if (ds->ops->adjust_link && phydev)
ds->ops->adjust_link(ds, dp->index, phydev);
return;
}
ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
}
static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
struct phy_device *phydev,
unsigned int mode,
phy_interface_t interface,
int speed, int duplex,
bool tx_pause, bool rx_pause)
{
struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
struct dsa_switch *ds = dp->ds;
if (!ds->ops->phylink_mac_link_up) {
if (ds->ops->adjust_link && phydev)
ds->ops->adjust_link(ds, dp->index, phydev);
return;
}
ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev,
speed, duplex, tx_pause, rx_pause);
}
const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
.validate = dsa_port_phylink_validate,
.mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state,
.mac_config = dsa_port_phylink_mac_config,
.mac_an_restart = dsa_port_phylink_mac_an_restart,
.mac_link_down = dsa_port_phylink_mac_link_down,
.mac_link_up = dsa_port_phylink_mac_link_up,
};
static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
{
struct dsa_switch *ds = dp->ds;
struct phy_device *phydev;
int port = dp->index;
int err = 0;
phydev = dsa_port_get_phy_device(dp);
if (!phydev)
return 0;
if (IS_ERR(phydev))
return PTR_ERR(phydev);
if (enable) {
err = genphy_resume(phydev);
if (err < 0)
goto err_put_dev;
err = genphy_read_status(phydev);
if (err < 0)
goto err_put_dev;
} else {