From 11d8f3ddab1e2b0f148def287859d0903b7f8ac5 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Thu, 10 May 2018 13:17:32 -0700 Subject: net: dsa: Add PHYLINK switch operations In preparation for adding support for PHYLINK within DSA, define a number of operations that we will need and that switch drivers can start implementing. Proper integration with PHYLINK will follow in subsequent patches. We start selecting PHYLINK (which implies PHYLIB) in net/dsa/Kconfig such that drivers can be guaranteed that this dependency is properly taken care of and can start referencing PHYLINK helper functions without requiring stubs or anything. Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- net/dsa/Kconfig | 2 +- net/dsa/slave.c | 5 +++++ 2 files changed, 6 insertions(+), 1 deletion(-) (limited to 'net') diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig index bbf2c82cf7b2..4183e4ba27a5 100644 --- a/net/dsa/Kconfig +++ b/net/dsa/Kconfig @@ -9,7 +9,7 @@ config NET_DSA depends on HAVE_NET_DSA && MAY_USE_DEVLINK depends on BRIDGE || BRIDGE=n select NET_SWITCHDEV - select PHYLIB + select PHYLINK ---help--- Say Y if you want to enable support for the hardware switches supported by the Distributed Switch Architecture. diff --git a/net/dsa/slave.c b/net/dsa/slave.c index 746ab428a17a..6c2f042e3c29 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -1119,6 +1119,11 @@ static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr) dsa_slave_adjust_link, p->phy_interface); } +void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) +{ +} +EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); + static int dsa_slave_phy_setup(struct net_device *slave_dev) { struct dsa_port *dp = dsa_slave_to_port(slave_dev); -- cgit v1.2.3-59-g8ed1b From c4aef9fc0d4b1d497c2f2973e3f123bcb96d6bbc Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Thu, 10 May 2018 13:17:34 -0700 Subject: net: dsa: Eliminate dsa_slave_get_link() Since we use PHYLIB to manage the per-port link indication, this will also be reflected correctly in the network device's carrier state, so we can use ethtool_op_get_link() instead. Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- net/dsa/slave.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) (limited to 'net') diff --git a/net/dsa/slave.c b/net/dsa/slave.c index 6c2f042e3c29..729f18d23bdd 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -498,16 +498,6 @@ dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) ds->ops->get_regs(ds, dp->index, regs, _p); } -static u32 dsa_slave_get_link(struct net_device *dev) -{ - if (!dev->phydev) - return -ENODEV; - - genphy_update_link(dev->phydev); - - return dev->phydev->link; -} - static int dsa_slave_get_eeprom_len(struct net_device *dev) { struct dsa_port *dp = dsa_slave_to_port(dev); @@ -982,7 +972,7 @@ static const struct ethtool_ops dsa_slave_ethtool_ops = { .get_regs_len = dsa_slave_get_regs_len, .get_regs = dsa_slave_get_regs, .nway_reset = phy_ethtool_nway_reset, - .get_link = dsa_slave_get_link, + .get_link = ethtool_op_get_link, .get_eeprom_len = dsa_slave_get_eeprom_len, .get_eeprom = dsa_slave_get_eeprom, .set_eeprom = dsa_slave_set_eeprom, -- cgit v1.2.3-59-g8ed1b From aab9c4067d2389d0adfc9c53806437df7b0fe3d5 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Thu, 10 May 2018 13:17:36 -0700 Subject: net: dsa: Plug in PHYLINK support Add support for PHYLINK within the DSA subsystem in order to support more complex devices such as pluggable (SFP) and non-pluggable (SFF) modules, 10G PHYs, and traditional PHYs. Using PHYLINK allows us to drop some amount of complexity we had while probing fixed and non-fixed PHYs using Device Tree. Because PHYLINK separates the Ethernet MAC/port configuration into different stages, we let switch drivers implement those, and for now, we maintain functionality by calling dsa_slave_adjust_link() during phylink_mac_link_{up,down} which provides semantically equivalent steps. Drivers willing to take advantage of PHYLINK should implement the phylink_mac_* operations that DSA wraps. We cannot quite remove the adjust_link() callback just yet, because a number of drivers rely on that for configuring their "CPU" and "DSA" ports, this is done dsa_port_setup_phy_of() and dsa_port_fixed_link_register_of() still. Drivers that utilize fixed links for user-facing ports (e.g: bcm_sf2) will need to implement phylink_mac_ops from now on to preserve functionality, since PHYLINK *does not* create a phy_device instance for fixed links. Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- include/net/dsa.h | 1 + net/dsa/dsa_priv.h | 9 -- net/dsa/slave.c | 294 +++++++++++++++++++++++++++++++---------------------- 3 files changed, 172 insertions(+), 132 deletions(-) (limited to 'net') diff --git a/include/net/dsa.h b/include/net/dsa.h index ed64c1f3f117..fdbd6082945d 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -201,6 +201,7 @@ struct dsa_port { u8 stp_state; struct net_device *bridge_dev; struct devlink_port devlink_port; + struct phylink *pl; /* * Original copy of the master netdev ethtool_ops */ diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h index 053731473c99..3964c6f7a7c0 100644 --- a/net/dsa/dsa_priv.h +++ b/net/dsa/dsa_priv.h @@ -75,15 +75,6 @@ struct dsa_slave_priv { /* DSA port data, such as switch, port index, etc. */ struct dsa_port *dp; - /* - * The phylib phy_device pointer for the PHY connected - * to this port. - */ - phy_interface_t phy_interface; - int old_link; - int old_pause; - int old_duplex; - #ifdef CONFIG_NET_POLL_CONTROLLER struct netpoll *netpoll; #endif diff --git a/net/dsa/slave.c b/net/dsa/slave.c index 729f18d23bdd..1e3b6a6d8a40 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -97,8 +98,7 @@ static int dsa_slave_open(struct net_device *dev) if (err) goto clear_promisc; - if (dev->phydev) - phy_start(dev->phydev); + phylink_start(dp->pl); return 0; @@ -120,8 +120,7 @@ static int dsa_slave_close(struct net_device *dev) struct net_device *master = dsa_slave_to_master(dev); struct dsa_port *dp = dsa_slave_to_port(dev); - if (dev->phydev) - phy_stop(dev->phydev); + phylink_stop(dp->pl); dsa_port_disable(dp, dev->phydev); @@ -272,10 +271,7 @@ static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) break; } - if (!dev->phydev) - return -ENODEV; - - return phy_mii_ioctl(dev->phydev, ifr, cmd); + return phylink_mii_ioctl(p->dp->pl, ifr, cmd); } static int dsa_slave_port_attr_set(struct net_device *dev, @@ -498,6 +494,13 @@ dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) ds->ops->get_regs(ds, dp->index, regs, _p); } +static int dsa_slave_nway_reset(struct net_device *dev) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + + return phylink_ethtool_nway_reset(dp->pl); +} + static int dsa_slave_get_eeprom_len(struct net_device *dev) { struct dsa_port *dp = dsa_slave_to_port(dev); @@ -609,6 +612,8 @@ static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) struct dsa_port *dp = dsa_slave_to_port(dev); struct dsa_switch *ds = dp->ds; + phylink_ethtool_get_wol(dp->pl, w); + if (ds->ops->get_wol) ds->ops->get_wol(ds, dp->index, w); } @@ -619,6 +624,8 @@ static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) struct dsa_switch *ds = dp->ds; int ret = -EOPNOTSUPP; + phylink_ethtool_set_wol(dp->pl, w); + if (ds->ops->set_wol) ret = ds->ops->set_wol(ds, dp->index, w); @@ -642,13 +649,7 @@ static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) if (ret) return ret; - if (e->eee_enabled) { - ret = phy_init_eee(dev->phydev, 0); - if (ret) - return ret; - } - - return phy_ethtool_set_eee(dev->phydev, e); + return phylink_ethtool_set_eee(dp->pl, e); } static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) @@ -668,7 +669,23 @@ static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) if (ret) return ret; - return phy_ethtool_get_eee(dev->phydev, e); + return phylink_ethtool_get_eee(dp->pl, e); +} + +static int dsa_slave_get_link_ksettings(struct net_device *dev, + struct ethtool_link_ksettings *cmd) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + + return phylink_ethtool_ksettings_get(dp->pl, cmd); +} + +static int dsa_slave_set_link_ksettings(struct net_device *dev, + const struct ethtool_link_ksettings *cmd) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + + return phylink_ethtool_ksettings_set(dp->pl, cmd); } #ifdef CONFIG_NET_POLL_CONTROLLER @@ -971,7 +988,7 @@ static const struct ethtool_ops dsa_slave_ethtool_ops = { .get_drvinfo = dsa_slave_get_drvinfo, .get_regs_len = dsa_slave_get_regs_len, .get_regs = dsa_slave_get_regs, - .nway_reset = phy_ethtool_nway_reset, + .nway_reset = dsa_slave_nway_reset, .get_link = ethtool_op_get_link, .get_eeprom_len = dsa_slave_get_eeprom_len, .get_eeprom = dsa_slave_get_eeprom, @@ -983,8 +1000,8 @@ static const struct ethtool_ops dsa_slave_ethtool_ops = { .get_wol = dsa_slave_get_wol, .set_eee = dsa_slave_set_eee, .get_eee = dsa_slave_get_eee, - .get_link_ksettings = phy_ethtool_get_link_ksettings, - .set_link_ksettings = phy_ethtool_set_link_ksettings, + .get_link_ksettings = dsa_slave_get_link_ksettings, + .set_link_ksettings = dsa_slave_set_link_ksettings, .get_rxnfc = dsa_slave_get_rxnfc, .set_rxnfc = dsa_slave_set_rxnfc, .get_ts_info = dsa_slave_get_ts_info, @@ -1043,56 +1060,122 @@ static struct device_type dsa_type = { .name = "dsa", }; -static void dsa_slave_adjust_link(struct net_device *dev) +static void dsa_slave_phylink_validate(struct net_device *dev, + unsigned long *supported, + struct phylink_link_state *state) { struct dsa_port *dp = dsa_slave_to_port(dev); - struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_switch *ds = dp->ds; - unsigned int status_changed = 0; - if (p->old_link != dev->phydev->link) { - status_changed = 1; - p->old_link = dev->phydev->link; - } + if (!ds->ops->phylink_validate) + return; - if (p->old_duplex != dev->phydev->duplex) { - status_changed = 1; - p->old_duplex = dev->phydev->duplex; - } + ds->ops->phylink_validate(ds, dp->index, supported, state); +} - if (p->old_pause != dev->phydev->pause) { - status_changed = 1; - p->old_pause = dev->phydev->pause; - } +static int dsa_slave_phylink_mac_link_state(struct net_device *dev, + struct phylink_link_state *state) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; - if (ds->ops->adjust_link && status_changed) - ds->ops->adjust_link(ds, dp->index, dev->phydev); + /* Only called for SGMII and 802.3z */ + if (!ds->ops->phylink_mac_link_state) + return -EOPNOTSUPP; - if (status_changed) - phy_print_status(dev->phydev); + return ds->ops->phylink_mac_link_state(ds, dp->index, state); } -static int dsa_slave_fixed_link_update(struct net_device *dev, - struct fixed_phy_status *status) +static void dsa_slave_phylink_mac_config(struct net_device *dev, + unsigned int mode, + const struct phylink_link_state *state) { - struct dsa_switch *ds; - struct dsa_port *dp; + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (!ds->ops->phylink_mac_config) + return; - if (dev) { - dp = dsa_slave_to_port(dev); - ds = dp->ds; - if (ds->ops->fixed_link_update) - ds->ops->fixed_link_update(ds, dp->index, status); + ds->ops->phylink_mac_config(ds, dp->index, mode, state); +} + +static void dsa_slave_phylink_mac_an_restart(struct net_device *dev) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + 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_slave_phylink_mac_link_down(struct net_device *dev, + unsigned int mode, + phy_interface_t interface) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (!ds->ops->phylink_mac_link_down) { + if (ds->ops->adjust_link && dev->phydev) + ds->ops->adjust_link(ds, dp->index, dev->phydev); + return; } - return 0; + ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface); +} + +static void dsa_slave_phylink_mac_link_up(struct net_device *dev, + unsigned int mode, + phy_interface_t interface, + struct phy_device *phydev) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + if (!ds->ops->phylink_mac_link_up) { + if (ds->ops->adjust_link && dev->phydev) + ds->ops->adjust_link(ds, dp->index, dev->phydev); + return; + } + + ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev); +} + +static const struct phylink_mac_ops dsa_slave_phylink_mac_ops = { + .validate = dsa_slave_phylink_validate, + .mac_link_state = dsa_slave_phylink_mac_link_state, + .mac_config = dsa_slave_phylink_mac_config, + .mac_an_restart = dsa_slave_phylink_mac_an_restart, + .mac_link_down = dsa_slave_phylink_mac_link_down, + .mac_link_up = dsa_slave_phylink_mac_link_up, +}; + +void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) +{ + const struct dsa_port *dp = dsa_to_port(ds, port); + + phylink_mac_change(dp->pl, up); +} +EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); + +static void dsa_slave_phylink_fixed_state(struct net_device *dev, + struct phylink_link_state *state) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct dsa_switch *ds = dp->ds; + + /* No need to check that this operation is valid, the callback would + * not be called if it was not. + */ + ds->ops->phylink_fixed_state(ds, dp->index, state); } /* slave device setup *******************************************************/ static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr) { struct dsa_port *dp = dsa_slave_to_port(slave_dev); - struct dsa_slave_priv *p = netdev_priv(slave_dev); struct dsa_switch *ds = dp->ds; slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); @@ -1101,80 +1184,54 @@ static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr) return -ENODEV; } - /* Use already configured phy mode */ - if (p->phy_interface == PHY_INTERFACE_MODE_NA) - p->phy_interface = slave_dev->phydev->interface; - - return phy_connect_direct(slave_dev, slave_dev->phydev, - dsa_slave_adjust_link, p->phy_interface); -} - -void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) -{ + return phylink_connect_phy(dp->pl, slave_dev->phydev); } -EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); static int dsa_slave_phy_setup(struct net_device *slave_dev) { struct dsa_port *dp = dsa_slave_to_port(slave_dev); - struct dsa_slave_priv *p = netdev_priv(slave_dev); struct device_node *port_dn = dp->dn; struct dsa_switch *ds = dp->ds; - struct device_node *phy_dn; - bool phy_is_fixed = false; u32 phy_flags = 0; int mode, ret; mode = of_get_phy_mode(port_dn); if (mode < 0) mode = PHY_INTERFACE_MODE_NA; - p->phy_interface = mode; - phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); - if (!phy_dn && of_phy_is_fixed_link(port_dn)) { - /* In the case of a fixed PHY, the DT node associated - * to the fixed PHY is the Port DT node - */ - ret = of_phy_register_fixed_link(port_dn); - if (ret) { - netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret); - return ret; - } - phy_is_fixed = true; - phy_dn = of_node_get(port_dn); + dp->pl = phylink_create(slave_dev, of_fwnode_handle(port_dn), mode, + &dsa_slave_phylink_mac_ops); + if (IS_ERR(dp->pl)) { + netdev_err(slave_dev, + "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); + return PTR_ERR(dp->pl); } + /* Register only if the switch provides such a callback, since this + * callback takes precedence over polling the link GPIO in PHYLINK + * (see phylink_get_fixed_state). + */ + if (ds->ops->phylink_fixed_state) + phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state); + if (ds->ops->get_phy_flags) phy_flags = ds->ops->get_phy_flags(ds, dp->index); - if (phy_dn) { - slave_dev->phydev = of_phy_connect(slave_dev, phy_dn, - dsa_slave_adjust_link, - phy_flags, - p->phy_interface); - of_node_put(phy_dn); - } - - if (slave_dev->phydev && phy_is_fixed) - fixed_phy_set_link_update(slave_dev->phydev, - dsa_slave_fixed_link_update); - - /* We could not connect to a designated PHY, so use the switch internal - * MDIO bus instead - */ - if (!slave_dev->phydev) { + ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); + if (ret == -ENODEV) { + /* We could not connect to a designated PHY or SFP, so use the + * switch internal MDIO bus instead + */ ret = dsa_slave_phy_connect(slave_dev, dp->index); if (ret) { - netdev_err(slave_dev, "failed to connect to port %d: %d\n", + netdev_err(slave_dev, + "failed to connect to port %d: %d\n", dp->index, ret); - if (phy_is_fixed) - of_phy_deregister_fixed_link(port_dn); + phylink_destroy(dp->pl); return ret; } } - phy_attached_info(slave_dev->phydev); - return 0; } @@ -1189,29 +1246,26 @@ static void dsa_slave_set_lockdep_class_one(struct net_device *dev, int dsa_slave_suspend(struct net_device *slave_dev) { - struct dsa_slave_priv *p = netdev_priv(slave_dev); + struct dsa_port *dp = dsa_slave_to_port(slave_dev); netif_device_detach(slave_dev); - if (slave_dev->phydev) { - phy_stop(slave_dev->phydev); - p->old_pause = -1; - p->old_link = -1; - p->old_duplex = -1; - phy_suspend(slave_dev->phydev); - } + rtnl_lock(); + phylink_stop(dp->pl); + rtnl_unlock(); return 0; } int dsa_slave_resume(struct net_device *slave_dev) { + struct dsa_port *dp = dsa_slave_to_port(slave_dev); + netif_device_attach(slave_dev); - if (slave_dev->phydev) { - phy_resume(slave_dev->phydev); - phy_start(slave_dev->phydev); - } + rtnl_lock(); + phylink_start(dp->pl); + rtnl_unlock(); return 0; } @@ -1276,11 +1330,6 @@ int dsa_slave_create(struct dsa_port *port) p->dp = port; INIT_LIST_HEAD(&p->mall_tc_list); p->xmit = cpu_dp->tag_ops->xmit; - - p->old_pause = -1; - p->old_link = -1; - p->old_duplex = -1; - port->slave = slave_dev; netif_carrier_off(slave_dev); @@ -1303,9 +1352,10 @@ int dsa_slave_create(struct dsa_port *port) return 0; out_phy: - phy_disconnect(slave_dev->phydev); - if (of_phy_is_fixed_link(port->dn)) - of_phy_deregister_fixed_link(port->dn); + rtnl_lock(); + phylink_disconnect_phy(p->dp->pl); + rtnl_unlock(); + phylink_destroy(p->dp->pl); out_free: free_percpu(p->stats64); free_netdev(slave_dev); @@ -1317,17 +1367,15 @@ void dsa_slave_destroy(struct net_device *slave_dev) { struct dsa_port *dp = dsa_slave_to_port(slave_dev); struct dsa_slave_priv *p = netdev_priv(slave_dev); - struct device_node *port_dn = dp->dn; netif_carrier_off(slave_dev); - if (slave_dev->phydev) { - phy_disconnect(slave_dev->phydev); + rtnl_lock(); + phylink_disconnect_phy(dp->pl); + rtnl_unlock(); - if (of_phy_is_fixed_link(port_dn)) - of_phy_deregister_fixed_link(port_dn); - } dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER); unregister_netdev(slave_dev); + phylink_destroy(dp->pl); free_percpu(p->stats64); free_netdev(slave_dev); } -- cgit v1.2.3-59-g8ed1b