449 lines
9.9 KiB
C
449 lines
9.9 KiB
C
/*
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* Handling of a single switch port
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*
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* Copyright (c) 2017 Savoir-faire Linux Inc.
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* Vivien Didelot <vivien.didelot@savoirfairelinux.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/if_bridge.h>
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#include <linux/notifier.h>
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#include <linux/of_mdio.h>
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#include <linux/of_net.h>
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#include "dsa_priv.h"
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static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v)
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{
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struct raw_notifier_head *nh = &dp->ds->dst->nh;
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int err;
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err = raw_notifier_call_chain(nh, e, v);
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return notifier_to_errno(err);
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}
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int dsa_port_set_state(struct dsa_port *dp, u8 state,
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struct switchdev_trans *trans)
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{
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struct dsa_switch *ds = dp->ds;
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int port = dp->index;
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if (switchdev_trans_ph_prepare(trans))
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return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP;
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if (ds->ops->port_stp_state_set)
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ds->ops->port_stp_state_set(ds, port, state);
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if (ds->ops->port_fast_age) {
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/* Fast age FDB entries or flush appropriate forwarding database
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* for the given port, if we are moving it from Learning or
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* Forwarding state, to Disabled or Blocking or Listening state.
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*/
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if ((dp->stp_state == BR_STATE_LEARNING ||
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dp->stp_state == BR_STATE_FORWARDING) &&
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(state == BR_STATE_DISABLED ||
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state == BR_STATE_BLOCKING ||
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state == BR_STATE_LISTENING))
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ds->ops->port_fast_age(ds, port);
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}
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dp->stp_state = state;
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return 0;
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}
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static void dsa_port_set_state_now(struct dsa_port *dp, u8 state)
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{
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int err;
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err = dsa_port_set_state(dp, state, NULL);
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if (err)
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pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
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}
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int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy)
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{
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u8 stp_state = dp->bridge_dev ? BR_STATE_BLOCKING : BR_STATE_FORWARDING;
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struct dsa_switch *ds = dp->ds;
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int port = dp->index;
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int err;
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if (ds->ops->port_enable) {
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err = ds->ops->port_enable(ds, port, phy);
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if (err)
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return err;
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}
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dsa_port_set_state_now(dp, stp_state);
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return 0;
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}
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void dsa_port_disable(struct dsa_port *dp, struct phy_device *phy)
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{
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struct dsa_switch *ds = dp->ds;
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int port = dp->index;
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dsa_port_set_state_now(dp, BR_STATE_DISABLED);
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if (ds->ops->port_disable)
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ds->ops->port_disable(ds, port, phy);
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}
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int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br)
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{
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struct dsa_notifier_bridge_info info = {
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.sw_index = dp->ds->index,
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.port = dp->index,
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.br = br,
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};
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int err;
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/* Here the port is already bridged. Reflect the current configuration
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* so that drivers can program their chips accordingly.
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*/
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dp->bridge_dev = br;
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err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_JOIN, &info);
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/* The bridging is rolled back on error */
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if (err)
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dp->bridge_dev = NULL;
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return err;
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}
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void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
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{
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struct dsa_notifier_bridge_info info = {
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.sw_index = dp->ds->index,
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.port = dp->index,
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.br = br,
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};
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int err;
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/* Here the port is already unbridged. Reflect the current configuration
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* so that drivers can program their chips accordingly.
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*/
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dp->bridge_dev = NULL;
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err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_LEAVE, &info);
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if (err)
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pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n");
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/* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
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* so allow it to be in BR_STATE_FORWARDING to be kept functional
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*/
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dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
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}
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int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
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struct switchdev_trans *trans)
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{
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struct dsa_switch *ds = dp->ds;
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/* bridge skips -EOPNOTSUPP, so skip the prepare phase */
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if (switchdev_trans_ph_prepare(trans))
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return 0;
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if (ds->ops->port_vlan_filtering)
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return ds->ops->port_vlan_filtering(ds, dp->index,
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vlan_filtering);
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return 0;
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}
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int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock,
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struct switchdev_trans *trans)
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{
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unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
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unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
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struct dsa_notifier_ageing_time_info info = {
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.ageing_time = ageing_time,
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.trans = trans,
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};
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if (switchdev_trans_ph_prepare(trans))
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return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
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dp->ageing_time = ageing_time;
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return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
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}
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int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
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u16 vid)
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{
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struct dsa_notifier_fdb_info info = {
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.sw_index = dp->ds->index,
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.port = dp->index,
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.addr = addr,
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.vid = vid,
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};
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return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
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}
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int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
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u16 vid)
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{
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struct dsa_notifier_fdb_info info = {
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.sw_index = dp->ds->index,
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.port = dp->index,
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.addr = addr,
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.vid = vid,
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};
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return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
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}
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int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
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{
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struct dsa_switch *ds = dp->ds;
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int port = dp->index;
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if (!ds->ops->port_fdb_dump)
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return -EOPNOTSUPP;
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return ds->ops->port_fdb_dump(ds, port, cb, data);
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}
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int dsa_port_mdb_add(const struct dsa_port *dp,
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const struct switchdev_obj_port_mdb *mdb,
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struct switchdev_trans *trans)
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{
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struct dsa_notifier_mdb_info info = {
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.sw_index = dp->ds->index,
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.port = dp->index,
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.trans = trans,
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.mdb = mdb,
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};
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return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
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}
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int dsa_port_mdb_del(const struct dsa_port *dp,
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const struct switchdev_obj_port_mdb *mdb)
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{
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struct dsa_notifier_mdb_info info = {
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.sw_index = dp->ds->index,
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.port = dp->index,
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.mdb = mdb,
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};
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return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
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}
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int dsa_port_vlan_add(struct dsa_port *dp,
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const struct switchdev_obj_port_vlan *vlan,
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struct switchdev_trans *trans)
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{
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struct dsa_notifier_vlan_info info = {
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.sw_index = dp->ds->index,
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.port = dp->index,
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.trans = trans,
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.vlan = vlan,
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};
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if (netif_is_bridge_master(vlan->obj.orig_dev))
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return -EOPNOTSUPP;
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if (br_vlan_enabled(dp->bridge_dev))
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return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
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return 0;
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}
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int dsa_port_vlan_del(struct dsa_port *dp,
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const struct switchdev_obj_port_vlan *vlan)
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{
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struct dsa_notifier_vlan_info info = {
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.sw_index = dp->ds->index,
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.port = dp->index,
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.vlan = vlan,
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};
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if (netif_is_bridge_master(vlan->obj.orig_dev))
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return -EOPNOTSUPP;
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if (br_vlan_enabled(dp->bridge_dev))
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return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
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return 0;
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}
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static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
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{
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struct device_node *phy_dn;
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struct phy_device *phydev;
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phy_dn = of_parse_phandle(dp->dn, "phy-handle", 0);
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if (!phy_dn)
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return NULL;
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phydev = of_phy_find_device(phy_dn);
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if (!phydev) {
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of_node_put(phy_dn);
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return ERR_PTR(-EPROBE_DEFER);
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}
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return phydev;
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}
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static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
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{
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struct dsa_switch *ds = dp->ds;
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struct phy_device *phydev;
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int port = dp->index;
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int err = 0;
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phydev = dsa_port_get_phy_device(dp);
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if (!phydev)
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return 0;
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if (IS_ERR(phydev))
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return PTR_ERR(phydev);
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if (enable) {
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err = genphy_config_init(phydev);
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if (err < 0)
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goto err_put_dev;
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err = genphy_resume(phydev);
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if (err < 0)
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goto err_put_dev;
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err = genphy_read_status(phydev);
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if (err < 0)
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goto err_put_dev;
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} else {
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err = genphy_suspend(phydev);
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if (err < 0)
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goto err_put_dev;
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}
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if (ds->ops->adjust_link)
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ds->ops->adjust_link(ds, port, phydev);
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dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev));
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err_put_dev:
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put_device(&phydev->mdio.dev);
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return err;
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}
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static int dsa_port_fixed_link_register_of(struct dsa_port *dp)
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{
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struct device_node *dn = dp->dn;
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struct dsa_switch *ds = dp->ds;
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struct phy_device *phydev;
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int port = dp->index;
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int mode;
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int err;
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err = of_phy_register_fixed_link(dn);
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if (err) {
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dev_err(ds->dev,
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"failed to register the fixed PHY of port %d\n",
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port);
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return err;
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}
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phydev = of_phy_find_device(dn);
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mode = of_get_phy_mode(dn);
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if (mode < 0)
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mode = PHY_INTERFACE_MODE_NA;
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phydev->interface = mode;
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genphy_config_init(phydev);
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genphy_read_status(phydev);
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if (ds->ops->adjust_link)
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ds->ops->adjust_link(ds, port, phydev);
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put_device(&phydev->mdio.dev);
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return 0;
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}
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int dsa_port_link_register_of(struct dsa_port *dp)
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{
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if (of_phy_is_fixed_link(dp->dn))
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return dsa_port_fixed_link_register_of(dp);
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else
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return dsa_port_setup_phy_of(dp, true);
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}
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void dsa_port_link_unregister_of(struct dsa_port *dp)
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{
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if (of_phy_is_fixed_link(dp->dn))
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of_phy_deregister_fixed_link(dp->dn);
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else
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dsa_port_setup_phy_of(dp, false);
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}
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int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data)
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{
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struct phy_device *phydev;
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int ret = -EOPNOTSUPP;
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if (of_phy_is_fixed_link(dp->dn))
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return ret;
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phydev = dsa_port_get_phy_device(dp);
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if (IS_ERR_OR_NULL(phydev))
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return ret;
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ret = phy_ethtool_get_strings(phydev, data);
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put_device(&phydev->mdio.dev);
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return ret;
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}
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EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings);
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int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data)
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{
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struct phy_device *phydev;
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int ret = -EOPNOTSUPP;
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if (of_phy_is_fixed_link(dp->dn))
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return ret;
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phydev = dsa_port_get_phy_device(dp);
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if (IS_ERR_OR_NULL(phydev))
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return ret;
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ret = phy_ethtool_get_stats(phydev, NULL, data);
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put_device(&phydev->mdio.dev);
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return ret;
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}
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EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats);
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int dsa_port_get_phy_sset_count(struct dsa_port *dp)
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{
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struct phy_device *phydev;
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int ret = -EOPNOTSUPP;
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if (of_phy_is_fixed_link(dp->dn))
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return ret;
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phydev = dsa_port_get_phy_device(dp);
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if (IS_ERR_OR_NULL(phydev))
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return ret;
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ret = phy_ethtool_get_sset_count(phydev);
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put_device(&phydev->mdio.dev);
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return ret;
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}
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EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count);
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