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net/dsa/port.c
16.6 KB
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* * Handling of a single switch port * * Copyright (c) 2017 Savoir-faire Linux Inc. * Vivien Didelot <vivien.didelot@savoirfairelinux.com> |
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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> #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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{ struct raw_notifier_head *nh = &dp->ds->dst->nh; int err; err = raw_notifier_call_chain(nh, e, v); return notifier_to_errno(err); } |
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int dsa_port_set_state(struct dsa_port *dp, u8 state, struct switchdev_trans *trans) { struct dsa_switch *ds = dp->ds; int port = dp->index; if (switchdev_trans_ph_prepare(trans)) return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP; if (ds->ops->port_stp_state_set) 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; } |
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static void dsa_port_set_state_now(struct dsa_port *dp, u8 state) |
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{ int err; err = dsa_port_set_state(dp, state, NULL); if (err) pr_err("DSA: failed to set STP state %u (%d) ", state, err); } |
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int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy) { |
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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; } |
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if (!dp->bridge_dev) dsa_port_set_state_now(dp, BR_STATE_FORWARDING); |
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return 0; } |
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void dsa_port_disable(struct dsa_port *dp) |
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{ struct dsa_switch *ds = dp->ds; int port = dp->index; |
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if (!dp->bridge_dev) 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); |
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} |
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int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br) { struct dsa_notifier_bridge_info info = { .sw_index = dp->ds->index, .port = dp->index, .br = br, }; int err; |
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/* Set the flooding mode before joining the port in the switch */ err = dsa_port_bridge_flags(dp, BR_FLOOD | BR_MCAST_FLOOD, NULL); if (err) return err; /* Here the interface is already bridged. Reflect the current * configuration so that drivers can program their chips accordingly. |
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*/ dp->bridge_dev = br; err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_JOIN, &info); /* The bridging is rolled back on error */ |
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if (err) { dsa_port_bridge_flags(dp, 0, NULL); |
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dp->bridge_dev = NULL; |
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} |
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return err; } void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br) { struct dsa_notifier_bridge_info info = { .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_port_notify(dp, DSA_NOTIFIER_BRIDGE_LEAVE, &info); if (err) pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE "); |
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/* Port is leaving the bridge, disable flooding */ dsa_port_bridge_flags(dp, 0, NULL); |
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/* 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); } |
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static bool dsa_port_can_apply_vlan_filtering(struct dsa_port *dp, bool vlan_filtering) { struct dsa_switch *ds = dp->ds; int i; 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) { dev_err(ds->dev, "VLAN filtering is a global setting "); return false; } } return true; } |
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int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering, struct switchdev_trans *trans) { struct dsa_switch *ds = dp->ds; |
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int err; |
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/* bridge skips -EOPNOTSUPP, so skip the prepare phase */ if (switchdev_trans_ph_prepare(trans)) return 0; |
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if (!ds->ops->port_vlan_filtering) return 0; if (!dsa_port_can_apply_vlan_filtering(dp, vlan_filtering)) return -EINVAL; |
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if (dsa_port_is_vlan_filtering(dp) == vlan_filtering) return 0; |
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err = ds->ops->port_vlan_filtering(ds, dp->index, vlan_filtering); if (err) return err; |
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if (ds->vlan_filtering_is_global) ds->vlan_filtering = vlan_filtering; else dp->vlan_filtering = 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, struct switchdev_trans *trans) { unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock); unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies); |
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struct dsa_notifier_ageing_time_info info = { .ageing_time = ageing_time, |
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.trans = trans, }; |
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if (switchdev_trans_ph_prepare(trans)) 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_pre_bridge_flags(const struct dsa_port *dp, unsigned long flags, struct switchdev_trans *trans) { struct dsa_switch *ds = dp->ds; if (!ds->ops->port_egress_floods || (flags & ~(BR_FLOOD | BR_MCAST_FLOOD))) return -EINVAL; return 0; } |
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int dsa_port_bridge_flags(const struct dsa_port *dp, unsigned long flags, struct switchdev_trans *trans) { struct dsa_switch *ds = dp->ds; int port = dp->index; int err = 0; if (switchdev_trans_ph_prepare(trans)) return 0; if (ds->ops->port_egress_floods) err = ds->ops->port_egress_floods(ds, port, flags & BR_FLOOD, flags & BR_MCAST_FLOOD); return err; } |
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int dsa_port_mrouter(struct dsa_port *dp, bool mrouter, struct switchdev_trans *trans) { struct dsa_switch *ds = dp->ds; int port = dp->index; if (switchdev_trans_ph_prepare(trans)) return ds->ops->port_egress_floods ? 0 : -EOPNOTSUPP; return ds->ops->port_egress_floods(ds, port, true, mrouter); } |
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int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr, u16 vid) |
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{ |
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struct dsa_notifier_fdb_info info = { .sw_index = dp->ds->index, .port = dp->index, |
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.addr = addr, .vid = vid, |
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}; |
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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, u16 vid) |
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{ |
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struct dsa_notifier_fdb_info info = { .sw_index = dp->ds->index, .port = dp->index, |
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.addr = addr, .vid = vid, |
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}; |
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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) { 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); } |
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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, struct switchdev_trans *trans) { |
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struct dsa_notifier_mdb_info info = { .sw_index = dp->ds->index, .port = dp->index, .trans = trans, .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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struct dsa_notifier_mdb_info info = { .sw_index = dp->ds->index, .port = dp->index, .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, const struct switchdev_obj_port_vlan *vlan, struct switchdev_trans *trans) { |
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struct dsa_notifier_vlan_info info = { .sw_index = dp->ds->index, .port = dp->index, .trans = trans, .vlan = vlan, }; |
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|
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return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info); |
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} int dsa_port_vlan_del(struct dsa_port *dp, const struct switchdev_obj_port_vlan *vlan) { |
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struct dsa_notifier_vlan_info info = { .sw_index = dp->ds->index, .port = dp->index, .vlan = vlan, }; |
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|
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return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info); |
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} |
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|
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int dsa_port_vid_add(struct dsa_port *dp, u16 vid, u16 flags) { struct switchdev_obj_port_vlan vlan = { .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, .flags = flags, .vid_begin = vid, .vid_end = vid, }; struct switchdev_trans trans; int err; trans.ph_prepare = true; err = dsa_port_vlan_add(dp, &vlan, &trans); |
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if (err) return err; |
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trans.ph_prepare = false; return dsa_port_vlan_add(dp, &vlan, &trans); } |
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EXPORT_SYMBOL(dsa_port_vid_add); |
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int dsa_port_vid_del(struct dsa_port *dp, u16 vid) { struct switchdev_obj_port_vlan vlan = { .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, .vid_begin = vid, .vid_end = vid, }; return dsa_port_vlan_del(dp, &vlan); } |
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EXPORT_SYMBOL(dsa_port_vid_del); |
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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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|
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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); if (!phydev) { |
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of_node_put(phy_dn); return ERR_PTR(-EPROBE_DEFER); |
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} |
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of_node_put(phy_dn); |
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return phydev; } |
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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); } EXPORT_SYMBOL_GPL(dsa_port_phylink_validate); |
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void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config, struct phylink_link_state *state) |
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{ struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); struct dsa_switch *ds = dp->ds; |
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/* Only called for inband modes */ if (!ds->ops->phylink_mac_link_state) { state->link = 0; return; } |
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|
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if (ds->ops->phylink_mac_link_state(ds, dp->index, state) < 0) state->link = 0; |
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} |
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EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_pcs_get_state); |
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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); } EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_config); 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); } EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_an_restart); 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); |
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struct phy_device *phydev = NULL; |
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struct dsa_switch *ds = dp->ds; |
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if (dsa_is_user_port(ds, dp->index)) phydev = dp->slave->phydev; |
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if (!ds->ops->phylink_mac_link_down) { |
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if (ds->ops->adjust_link && phydev) ds->ops->adjust_link(ds, dp->index, phydev); |
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return; } ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface); } EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_link_down); void dsa_port_phylink_mac_link_up(struct phylink_config *config, unsigned int mode, phy_interface_t interface, struct phy_device *phydev) { struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); |
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struct dsa_switch *ds = dp->ds; if (!ds->ops->phylink_mac_link_up) { |
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if (ds->ops->adjust_link && phydev) ds->ops->adjust_link(ds, dp->index, phydev); |
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return; } ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev); } EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_link_up); const struct phylink_mac_ops dsa_port_phylink_mac_ops = { .validate = dsa_port_phylink_validate, |
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.mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state, |
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.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, }; |
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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); |
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if (enable) { |
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err = genphy_resume(phydev); if (err < 0) goto err_put_dev; err = genphy_read_status(phydev); if (err < 0) goto err_put_dev; } else { err = genphy_suspend(phydev); if (err < 0) goto err_put_dev; } if (ds->ops->adjust_link) ds->ops->adjust_link(ds, port, phydev); dev_dbg(ds->dev, "enabled port's phy: %s", phydev_name(phydev)); err_put_dev: put_device(&phydev->mdio.dev); |
33615367f net: dsa: Support... |
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return err; } static int dsa_port_fixed_link_register_of(struct dsa_port *dp) |
57ab1ca21 net: dsa: move fi... |
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{ struct device_node *dn = dp->dn; struct dsa_switch *ds = dp->ds; struct phy_device *phydev; int port = dp->index; |
0c65b2b90 net: of_get_phy_m... |
538 |
phy_interface_t mode; |
57ab1ca21 net: dsa: move fi... |
539 |
int err; |
33615367f net: dsa: Support... |
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err = of_phy_register_fixed_link(dn); if (err) { dev_err(ds->dev, "failed to register the fixed PHY of port %d ", port); return err; } |
57ab1ca21 net: dsa: move fi... |
548 |
|
33615367f net: dsa: Support... |
549 |
phydev = of_phy_find_device(dn); |
57ab1ca21 net: dsa: move fi... |
550 |
|
0c65b2b90 net: of_get_phy_m... |
551 552 |
err = of_get_phy_mode(dn, &mode); if (err) |
33615367f net: dsa: Support... |
553 554 |
mode = PHY_INTERFACE_MODE_NA; phydev->interface = mode; |
57ab1ca21 net: dsa: move fi... |
555 |
|
33615367f net: dsa: Support... |
556 |
genphy_read_status(phydev); |
57ab1ca21 net: dsa: move fi... |
557 |
|
33615367f net: dsa: Support... |
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if (ds->ops->adjust_link) ds->ops->adjust_link(ds, port, phydev); |
57ab1ca21 net: dsa: move fi... |
560 |
|
33615367f net: dsa: Support... |
561 |
put_device(&phydev->mdio.dev); |
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return 0; } |
0e2792181 net: dsa: Use PHY... |
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static int dsa_port_phylink_register(struct dsa_port *dp) { struct dsa_switch *ds = dp->ds; struct device_node *port_dn = dp->dn; |
0c65b2b90 net: of_get_phy_m... |
569 570 |
phy_interface_t mode; int err; |
0e2792181 net: dsa: Use PHY... |
571 |
|
0c65b2b90 net: of_get_phy_m... |
572 573 |
err = of_get_phy_mode(port_dn, &mode); if (err) |
0e2792181 net: dsa: Use PHY... |
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mode = PHY_INTERFACE_MODE_NA; dp->pl_config.dev = ds->dev; dp->pl_config.type = PHYLINK_DEV; dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode, &dsa_port_phylink_mac_ops); if (IS_ERR(dp->pl)) { pr_err("error creating PHYLINK: %ld ", PTR_ERR(dp->pl)); return PTR_ERR(dp->pl); } err = phylink_of_phy_connect(dp->pl, port_dn, 0); |
2131fba53 net: dsa: Deal wi... |
588 |
if (err && err != -ENODEV) { |
0e2792181 net: dsa: Use PHY... |
589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 |
pr_err("could not attach to PHY: %d ", err); goto err_phy_connect; } rtnl_lock(); phylink_start(dp->pl); rtnl_unlock(); return 0; err_phy_connect: phylink_destroy(dp->pl); return err; } |
33615367f net: dsa: Support... |
604 |
int dsa_port_link_register_of(struct dsa_port *dp) |
57ab1ca21 net: dsa: move fi... |
605 |
{ |
0e2792181 net: dsa: Use PHY... |
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struct dsa_switch *ds = dp->ds; if (!ds->ops->adjust_link) return dsa_port_phylink_register(dp); dev_warn(ds->dev, "Using legacy PHYLIB callbacks. Please migrate to PHYLINK! "); |
33615367f net: dsa: Support... |
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if (of_phy_is_fixed_link(dp->dn)) return dsa_port_fixed_link_register_of(dp); else return dsa_port_setup_phy_of(dp, true); } |
57ab1ca21 net: dsa: move fi... |
619 |
|
33615367f net: dsa: Support... |
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void dsa_port_link_unregister_of(struct dsa_port *dp) { |
0e2792181 net: dsa: Use PHY... |
622 623 624 625 626 627 628 629 630 |
struct dsa_switch *ds = dp->ds; if (!ds->ops->adjust_link) { rtnl_lock(); phylink_disconnect_phy(dp->pl); rtnl_unlock(); phylink_destroy(dp->pl); return; } |
33615367f net: dsa: Support... |
631 632 633 634 |
if (of_phy_is_fixed_link(dp->dn)) of_phy_deregister_fixed_link(dp->dn); else dsa_port_setup_phy_of(dp, false); |
57ab1ca21 net: dsa: move fi... |
635 |
} |
cf9635730 net: dsa: Allow p... |
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int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data) { struct phy_device *phydev; int ret = -EOPNOTSUPP; if (of_phy_is_fixed_link(dp->dn)) return ret; phydev = dsa_port_get_phy_device(dp); if (IS_ERR_OR_NULL(phydev)) return ret; ret = phy_ethtool_get_strings(phydev, data); put_device(&phydev->mdio.dev); return ret; } EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings); int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data) { struct phy_device *phydev; int ret = -EOPNOTSUPP; if (of_phy_is_fixed_link(dp->dn)) return ret; phydev = dsa_port_get_phy_device(dp); if (IS_ERR_OR_NULL(phydev)) return ret; ret = phy_ethtool_get_stats(phydev, NULL, data); put_device(&phydev->mdio.dev); return ret; } EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats); int dsa_port_get_phy_sset_count(struct dsa_port *dp) { struct phy_device *phydev; int ret = -EOPNOTSUPP; if (of_phy_is_fixed_link(dp->dn)) return ret; phydev = dsa_port_get_phy_device(dp); if (IS_ERR_OR_NULL(phydev)) return ret; ret = phy_ethtool_get_sset_count(phydev); put_device(&phydev->mdio.dev); return ret; } EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count); |