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 <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli
David S. Miller
Родитель
c9a2356f35
Коммит
aab9c4067d
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@ -201,6 +201,7 @@ struct dsa_port {
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u8 stp_state;
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struct net_device *bridge_dev;
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struct devlink_port devlink_port;
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struct phylink *pl;
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/*
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* Original copy of the master netdev ethtool_ops
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*/
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@ -75,15 +75,6 @@ struct dsa_slave_priv {
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/* DSA port data, such as switch, port index, etc. */
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struct dsa_port *dp;
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/*
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* The phylib phy_device pointer for the PHY connected
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* to this port.
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*/
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phy_interface_t phy_interface;
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int old_link;
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int old_pause;
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int old_duplex;
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#ifdef CONFIG_NET_POLL_CONTROLLER
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struct netpoll *netpoll;
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#endif
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300
net/dsa/slave.c
300
net/dsa/slave.c
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@ -13,6 +13,7 @@
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#include <linux/netdevice.h>
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#include <linux/phy.h>
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#include <linux/phy_fixed.h>
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#include <linux/phylink.h>
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#include <linux/of_net.h>
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#include <linux/of_mdio.h>
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#include <linux/mdio.h>
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@ -97,8 +98,7 @@ static int dsa_slave_open(struct net_device *dev)
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if (err)
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goto clear_promisc;
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if (dev->phydev)
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phy_start(dev->phydev);
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phylink_start(dp->pl);
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return 0;
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@ -120,8 +120,7 @@ static int dsa_slave_close(struct net_device *dev)
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struct net_device *master = dsa_slave_to_master(dev);
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struct dsa_port *dp = dsa_slave_to_port(dev);
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if (dev->phydev)
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phy_stop(dev->phydev);
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phylink_stop(dp->pl);
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dsa_port_disable(dp, dev->phydev);
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@ -272,10 +271,7 @@ static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
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break;
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}
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if (!dev->phydev)
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return -ENODEV;
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return phy_mii_ioctl(dev->phydev, ifr, cmd);
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return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
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}
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static int dsa_slave_port_attr_set(struct net_device *dev,
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@ -498,6 +494,13 @@ dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
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ds->ops->get_regs(ds, dp->index, regs, _p);
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}
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static int dsa_slave_nway_reset(struct net_device *dev)
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{
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struct dsa_port *dp = dsa_slave_to_port(dev);
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return phylink_ethtool_nway_reset(dp->pl);
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}
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static int dsa_slave_get_eeprom_len(struct net_device *dev)
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{
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struct dsa_port *dp = dsa_slave_to_port(dev);
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@ -609,6 +612,8 @@ static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
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struct dsa_port *dp = dsa_slave_to_port(dev);
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struct dsa_switch *ds = dp->ds;
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phylink_ethtool_get_wol(dp->pl, w);
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if (ds->ops->get_wol)
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ds->ops->get_wol(ds, dp->index, w);
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}
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@ -619,6 +624,8 @@ static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
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struct dsa_switch *ds = dp->ds;
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int ret = -EOPNOTSUPP;
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phylink_ethtool_set_wol(dp->pl, w);
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if (ds->ops->set_wol)
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ret = ds->ops->set_wol(ds, dp->index, w);
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@ -642,13 +649,7 @@ static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
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if (ret)
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return ret;
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if (e->eee_enabled) {
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ret = phy_init_eee(dev->phydev, 0);
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if (ret)
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return ret;
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}
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return phy_ethtool_set_eee(dev->phydev, e);
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return phylink_ethtool_set_eee(dp->pl, e);
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}
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static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
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@ -668,7 +669,23 @@ static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
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if (ret)
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return ret;
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return phy_ethtool_get_eee(dev->phydev, e);
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return phylink_ethtool_get_eee(dp->pl, e);
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}
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static int dsa_slave_get_link_ksettings(struct net_device *dev,
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struct ethtool_link_ksettings *cmd)
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{
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struct dsa_port *dp = dsa_slave_to_port(dev);
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return phylink_ethtool_ksettings_get(dp->pl, cmd);
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}
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static int dsa_slave_set_link_ksettings(struct net_device *dev,
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const struct ethtool_link_ksettings *cmd)
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{
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struct dsa_port *dp = dsa_slave_to_port(dev);
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return phylink_ethtool_ksettings_set(dp->pl, cmd);
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}
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#ifdef CONFIG_NET_POLL_CONTROLLER
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@ -971,7 +988,7 @@ static const struct ethtool_ops dsa_slave_ethtool_ops = {
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.get_drvinfo = dsa_slave_get_drvinfo,
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.get_regs_len = dsa_slave_get_regs_len,
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.get_regs = dsa_slave_get_regs,
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.nway_reset = phy_ethtool_nway_reset,
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.nway_reset = dsa_slave_nway_reset,
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.get_link = ethtool_op_get_link,
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.get_eeprom_len = dsa_slave_get_eeprom_len,
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.get_eeprom = dsa_slave_get_eeprom,
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@ -983,8 +1000,8 @@ static const struct ethtool_ops dsa_slave_ethtool_ops = {
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.get_wol = dsa_slave_get_wol,
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.set_eee = dsa_slave_set_eee,
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.get_eee = dsa_slave_get_eee,
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.get_link_ksettings = phy_ethtool_get_link_ksettings,
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.set_link_ksettings = phy_ethtool_set_link_ksettings,
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.get_link_ksettings = dsa_slave_get_link_ksettings,
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.set_link_ksettings = dsa_slave_set_link_ksettings,
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.get_rxnfc = dsa_slave_get_rxnfc,
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.set_rxnfc = dsa_slave_set_rxnfc,
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.get_ts_info = dsa_slave_get_ts_info,
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@ -1043,56 +1060,122 @@ static struct device_type dsa_type = {
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.name = "dsa",
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};
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static void dsa_slave_adjust_link(struct net_device *dev)
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static void dsa_slave_phylink_validate(struct net_device *dev,
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unsigned long *supported,
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struct phylink_link_state *state)
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{
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struct dsa_port *dp = dsa_slave_to_port(dev);
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struct dsa_slave_priv *p = netdev_priv(dev);
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struct dsa_switch *ds = dp->ds;
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unsigned int status_changed = 0;
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if (p->old_link != dev->phydev->link) {
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status_changed = 1;
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p->old_link = dev->phydev->link;
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}
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if (!ds->ops->phylink_validate)
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return;
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if (p->old_duplex != dev->phydev->duplex) {
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status_changed = 1;
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p->old_duplex = dev->phydev->duplex;
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}
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if (p->old_pause != dev->phydev->pause) {
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status_changed = 1;
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p->old_pause = dev->phydev->pause;
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}
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if (ds->ops->adjust_link && status_changed)
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ds->ops->adjust_link(ds, dp->index, dev->phydev);
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if (status_changed)
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phy_print_status(dev->phydev);
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ds->ops->phylink_validate(ds, dp->index, supported, state);
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}
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static int dsa_slave_fixed_link_update(struct net_device *dev,
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struct fixed_phy_status *status)
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static int dsa_slave_phylink_mac_link_state(struct net_device *dev,
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struct phylink_link_state *state)
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{
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struct dsa_switch *ds;
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struct dsa_port *dp;
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struct dsa_port *dp = dsa_slave_to_port(dev);
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struct dsa_switch *ds = dp->ds;
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if (dev) {
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dp = dsa_slave_to_port(dev);
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ds = dp->ds;
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if (ds->ops->fixed_link_update)
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ds->ops->fixed_link_update(ds, dp->index, status);
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/* Only called for SGMII and 802.3z */
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if (!ds->ops->phylink_mac_link_state)
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return -EOPNOTSUPP;
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return ds->ops->phylink_mac_link_state(ds, dp->index, state);
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}
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static void dsa_slave_phylink_mac_config(struct net_device *dev,
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unsigned int mode,
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const struct phylink_link_state *state)
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{
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struct dsa_port *dp = dsa_slave_to_port(dev);
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struct dsa_switch *ds = dp->ds;
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if (!ds->ops->phylink_mac_config)
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return;
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ds->ops->phylink_mac_config(ds, dp->index, mode, state);
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}
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static void dsa_slave_phylink_mac_an_restart(struct net_device *dev)
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{
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struct dsa_port *dp = dsa_slave_to_port(dev);
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struct dsa_switch *ds = dp->ds;
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if (!ds->ops->phylink_mac_an_restart)
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return;
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ds->ops->phylink_mac_an_restart(ds, dp->index);
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}
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static void dsa_slave_phylink_mac_link_down(struct net_device *dev,
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unsigned int mode,
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phy_interface_t interface)
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{
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struct dsa_port *dp = dsa_slave_to_port(dev);
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struct dsa_switch *ds = dp->ds;
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if (!ds->ops->phylink_mac_link_down) {
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if (ds->ops->adjust_link && dev->phydev)
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ds->ops->adjust_link(ds, dp->index, dev->phydev);
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return;
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}
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return 0;
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ds->ops->phylink_mac_link_down(ds, dp->index, mode, interface);
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}
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static void dsa_slave_phylink_mac_link_up(struct net_device *dev,
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unsigned int mode,
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phy_interface_t interface,
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struct phy_device *phydev)
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{
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struct dsa_port *dp = dsa_slave_to_port(dev);
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struct dsa_switch *ds = dp->ds;
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if (!ds->ops->phylink_mac_link_up) {
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if (ds->ops->adjust_link && dev->phydev)
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ds->ops->adjust_link(ds, dp->index, dev->phydev);
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return;
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}
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ds->ops->phylink_mac_link_up(ds, dp->index, mode, interface, phydev);
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}
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static const struct phylink_mac_ops dsa_slave_phylink_mac_ops = {
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.validate = dsa_slave_phylink_validate,
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.mac_link_state = dsa_slave_phylink_mac_link_state,
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.mac_config = dsa_slave_phylink_mac_config,
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.mac_an_restart = dsa_slave_phylink_mac_an_restart,
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.mac_link_down = dsa_slave_phylink_mac_link_down,
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.mac_link_up = dsa_slave_phylink_mac_link_up,
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};
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void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
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{
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const struct dsa_port *dp = dsa_to_port(ds, port);
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phylink_mac_change(dp->pl, up);
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}
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EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
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static void dsa_slave_phylink_fixed_state(struct net_device *dev,
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struct phylink_link_state *state)
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{
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struct dsa_port *dp = dsa_slave_to_port(dev);
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struct dsa_switch *ds = dp->ds;
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/* No need to check that this operation is valid, the callback would
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* not be called if it was not.
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*/
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ds->ops->phylink_fixed_state(ds, dp->index, state);
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}
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/* slave device setup *******************************************************/
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static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
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{
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struct dsa_port *dp = dsa_slave_to_port(slave_dev);
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struct dsa_slave_priv *p = netdev_priv(slave_dev);
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struct dsa_switch *ds = dp->ds;
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slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
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@ -1101,80 +1184,54 @@ static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
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return -ENODEV;
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}
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/* Use already configured phy mode */
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if (p->phy_interface == PHY_INTERFACE_MODE_NA)
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p->phy_interface = slave_dev->phydev->interface;
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return phy_connect_direct(slave_dev, slave_dev->phydev,
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dsa_slave_adjust_link, p->phy_interface);
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return phylink_connect_phy(dp->pl, slave_dev->phydev);
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}
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void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
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{
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}
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EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
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static int dsa_slave_phy_setup(struct net_device *slave_dev)
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{
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struct dsa_port *dp = dsa_slave_to_port(slave_dev);
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struct dsa_slave_priv *p = netdev_priv(slave_dev);
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struct device_node *port_dn = dp->dn;
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struct dsa_switch *ds = dp->ds;
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struct device_node *phy_dn;
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bool phy_is_fixed = false;
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u32 phy_flags = 0;
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int mode, ret;
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mode = of_get_phy_mode(port_dn);
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if (mode < 0)
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mode = PHY_INTERFACE_MODE_NA;
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p->phy_interface = mode;
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phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
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if (!phy_dn && of_phy_is_fixed_link(port_dn)) {
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/* In the case of a fixed PHY, the DT node associated
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* to the fixed PHY is the Port DT node
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*/
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ret = of_phy_register_fixed_link(port_dn);
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if (ret) {
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netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
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return ret;
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}
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phy_is_fixed = true;
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phy_dn = of_node_get(port_dn);
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dp->pl = phylink_create(slave_dev, of_fwnode_handle(port_dn), mode,
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&dsa_slave_phylink_mac_ops);
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if (IS_ERR(dp->pl)) {
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netdev_err(slave_dev,
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"error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
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return PTR_ERR(dp->pl);
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}
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/* Register only if the switch provides such a callback, since this
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* callback takes precedence over polling the link GPIO in PHYLINK
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* (see phylink_get_fixed_state).
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*/
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if (ds->ops->phylink_fixed_state)
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phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state);
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if (ds->ops->get_phy_flags)
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phy_flags = ds->ops->get_phy_flags(ds, dp->index);
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if (phy_dn) {
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slave_dev->phydev = of_phy_connect(slave_dev, phy_dn,
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dsa_slave_adjust_link,
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phy_flags,
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p->phy_interface);
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of_node_put(phy_dn);
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}
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if (slave_dev->phydev && phy_is_fixed)
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fixed_phy_set_link_update(slave_dev->phydev,
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dsa_slave_fixed_link_update);
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/* We could not connect to a designated PHY, so use the switch internal
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* MDIO bus instead
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*/
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if (!slave_dev->phydev) {
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ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
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if (ret == -ENODEV) {
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/* We could not connect to a designated PHY or SFP, so use the
|
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* switch internal MDIO bus instead
|
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*/
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ret = dsa_slave_phy_connect(slave_dev, dp->index);
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if (ret) {
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netdev_err(slave_dev, "failed to connect to port %d: %d\n",
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netdev_err(slave_dev,
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"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);
|
||||
}
|
||||
|
|
|
|||
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