--- /dev/null
+/*
+ * phylink models the MAC to optional PHY connection, supporting
+ * technologies such as SFP cages where the PHY is hot-pluggable.
+ *
+ * Copyright (C) 2015 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/ethtool.h>
+#include <linux/export.h>
+#include <linux/gpio/consumer.h>
+#include <linux/netdevice.h>
+#include <linux/of.h>
+#include <linux/of_mdio.h>
+#include <linux/phy.h>
+#include <linux/phy_fixed.h>
+#include <linux/phylink.h>
+#include <linux/rtnetlink.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+
+#include "swphy.h"
+
+#define SUPPORTED_INTERFACES \
+ (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \
+ SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane)
+#define ADVERTISED_INTERFACES \
+ (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \
+ ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane)
+
+enum {
+ PHYLINK_DISABLE_STOPPED,
+};
+
+struct phylink {
+ struct net_device *netdev;
+ const struct phylink_mac_ops *ops;
+
+ unsigned long phylink_disable_state; /* bitmask of disables */
+ struct phy_device *phydev;
+ phy_interface_t link_interface; /* PHY_INTERFACE_xxx */
+ u8 link_an_mode; /* MLO_AN_xxx */
+ u8 link_port; /* The current non-phy ethtool port */
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
+
+ /* The link configuration settings */
+ struct phylink_link_state link_config;
+ struct gpio_desc *link_gpio;
+
+ struct mutex state_mutex;
+ struct phylink_link_state phy_state;
+ struct work_struct resolve;
+
+ bool mac_link_dropped;
+};
+
+static inline void linkmode_zero(unsigned long *dst)
+{
+ bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
+}
+
+static inline void linkmode_copy(unsigned long *dst, const unsigned long *src)
+{
+ bitmap_copy(dst, src, __ETHTOOL_LINK_MODE_MASK_NBITS);
+}
+
+static inline void linkmode_and(unsigned long *dst, const unsigned long *a,
+ const unsigned long *b)
+{
+ bitmap_and(dst, a, b, __ETHTOOL_LINK_MODE_MASK_NBITS);
+}
+
+static inline void linkmode_or(unsigned long *dst, const unsigned long *a,
+ const unsigned long *b)
+{
+ bitmap_or(dst, a, b, __ETHTOOL_LINK_MODE_MASK_NBITS);
+}
+
+static inline bool linkmode_empty(const unsigned long *src)
+{
+ return bitmap_empty(src, __ETHTOOL_LINK_MODE_MASK_NBITS);
+}
+
+void phylink_set_port_modes(unsigned long *mask)
+{
+ phylink_set(mask, TP);
+ phylink_set(mask, AUI);
+ phylink_set(mask, MII);
+ phylink_set(mask, FIBRE);
+ phylink_set(mask, BNC);
+ phylink_set(mask, Backplane);
+}
+EXPORT_SYMBOL_GPL(phylink_set_port_modes);
+
+static int phylink_is_empty_linkmode(const unsigned long *linkmode)
+{
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, };
+
+ phylink_set_port_modes(tmp);
+ phylink_set(tmp, Autoneg);
+ phylink_set(tmp, Pause);
+ phylink_set(tmp, Asym_Pause);
+
+ bitmap_andnot(tmp, linkmode, tmp, __ETHTOOL_LINK_MODE_MASK_NBITS);
+
+ return linkmode_empty(tmp);
+}
+
+static const char *phylink_an_mode_str(unsigned int mode)
+{
+ static const char *modestr[] = {
+ [MLO_AN_PHY] = "phy",
+ [MLO_AN_FIXED] = "fixed",
+ [MLO_AN_SGMII] = "SGMII",
+ [MLO_AN_8023Z] = "802.3z",
+ };
+
+ return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
+}
+
+static int phylink_validate(struct phylink *pl, unsigned long *supported,
+ struct phylink_link_state *state)
+{
+ pl->ops->validate(pl->netdev, supported, state);
+
+ return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
+}
+
+static int phylink_parse_fixedlink(struct phylink *pl, struct device_node *np)
+{
+ struct device_node *fixed_node;
+ const struct phy_setting *s;
+ struct gpio_desc *desc;
+ const __be32 *fixed_prop;
+ u32 speed;
+ int ret, len;
+
+ fixed_node = of_get_child_by_name(np, "fixed-link");
+ if (fixed_node) {
+ ret = of_property_read_u32(fixed_node, "speed", &speed);
+
+ pl->link_config.speed = speed;
+ pl->link_config.duplex = DUPLEX_HALF;
+
+ if (of_property_read_bool(fixed_node, "full-duplex"))
+ pl->link_config.duplex = DUPLEX_FULL;
+
+ /* We treat the "pause" and "asym-pause" terminology as
+ * defining the link partner's ability. */
+ if (of_property_read_bool(fixed_node, "pause"))
+ pl->link_config.pause |= MLO_PAUSE_SYM;
+ if (of_property_read_bool(fixed_node, "asym-pause"))
+ pl->link_config.pause |= MLO_PAUSE_ASYM;
+
+ if (ret == 0) {
+ desc = fwnode_get_named_gpiod(&fixed_node->fwnode,
+ "link-gpios", 0,
+ GPIOD_IN, "?");
+
+ if (!IS_ERR(desc))
+ pl->link_gpio = desc;
+ else if (desc == ERR_PTR(-EPROBE_DEFER))
+ ret = -EPROBE_DEFER;
+ }
+ of_node_put(fixed_node);
+
+ if (ret)
+ return ret;
+ } else {
+ fixed_prop = of_get_property(np, "fixed-link", &len);
+ if (!fixed_prop) {
+ netdev_err(pl->netdev, "broken fixed-link?\n");
+ return -EINVAL;
+ }
+ if (len == 5 * sizeof(*fixed_prop)) {
+ pl->link_config.duplex = be32_to_cpu(fixed_prop[1]) ?
+ DUPLEX_FULL : DUPLEX_HALF;
+ pl->link_config.speed = be32_to_cpu(fixed_prop[2]);
+ if (be32_to_cpu(fixed_prop[3]))
+ pl->link_config.pause |= MLO_PAUSE_SYM;
+ if (be32_to_cpu(fixed_prop[4]))
+ pl->link_config.pause |= MLO_PAUSE_ASYM;
+ }
+ }
+
+ if (pl->link_config.speed > SPEED_1000 &&
+ pl->link_config.duplex != DUPLEX_FULL)
+ netdev_warn(pl->netdev, "fixed link specifies half duplex for %dMbps link?\n",
+ pl->link_config.speed);
+
+ bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
+ linkmode_copy(pl->link_config.advertising, pl->supported);
+ phylink_validate(pl, pl->supported, &pl->link_config);
+
+ s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
+ pl->supported,
+ __ETHTOOL_LINK_MODE_MASK_NBITS, true);
+ linkmode_zero(pl->supported);
+ phylink_set(pl->supported, MII);
+ if (s) {
+ __set_bit(s->bit, pl->supported);
+ } else {
+ netdev_warn(pl->netdev, "fixed link %s duplex %dMbps not recognised\n",
+ pl->link_config.duplex == DUPLEX_FULL ? "full" : "half",
+ pl->link_config.speed);
+ }
+
+ linkmode_and(pl->link_config.advertising, pl->link_config.advertising,
+ pl->supported);
+
+ pl->link_config.link = 1;
+ pl->link_config.an_complete = 1;
+
+ return 0;
+}
+
+static int phylink_parse_mode(struct phylink *pl, struct device_node *np)
+{
+ struct device_node *dn;
+ const char *managed;
+
+ dn = of_get_child_by_name(np, "fixed-link");
+ if (dn || of_find_property(np, "fixed-link", NULL))
+ pl->link_an_mode = MLO_AN_FIXED;
+ of_node_put(dn);
+
+ if (of_property_read_string(np, "managed", &managed) == 0 &&
+ strcmp(managed, "in-band-status") == 0) {
+ if (pl->link_an_mode == MLO_AN_FIXED) {
+ netdev_err(pl->netdev,
+ "can't use both fixed-link and in-band-status\n");
+ return -EINVAL;
+ }
+
+ linkmode_zero(pl->supported);
+ phylink_set(pl->supported, MII);
+ phylink_set(pl->supported, Autoneg);
+ phylink_set(pl->supported, Asym_Pause);
+ phylink_set(pl->supported, Pause);
+ pl->link_config.an_enabled = true;
+
+ switch (pl->link_config.interface) {
+ case PHY_INTERFACE_MODE_SGMII:
+ phylink_set(pl->supported, 10baseT_Half);
+ phylink_set(pl->supported, 10baseT_Full);
+ phylink_set(pl->supported, 100baseT_Half);
+ phylink_set(pl->supported, 100baseT_Full);
+ phylink_set(pl->supported, 1000baseT_Half);
+ phylink_set(pl->supported, 1000baseT_Full);
+ pl->link_an_mode = MLO_AN_SGMII;
+ break;
+
+ case PHY_INTERFACE_MODE_1000BASEX:
+ phylink_set(pl->supported, 1000baseX_Full);
+ pl->link_an_mode = MLO_AN_8023Z;
+ break;
+
+ case PHY_INTERFACE_MODE_2500BASEX:
+ phylink_set(pl->supported, 2500baseX_Full);
+ pl->link_an_mode = MLO_AN_8023Z;
+ break;
+
+ default:
+ netdev_err(pl->netdev,
+ "incorrect link mode %s for in-band status\n",
+ phy_modes(pl->link_config.interface));
+ return -EINVAL;
+ }
+
+ linkmode_copy(pl->link_config.advertising, pl->supported);
+
+ if (phylink_validate(pl, pl->supported, &pl->link_config)) {
+ netdev_err(pl->netdev,
+ "failed to validate link configuration for in-band status\n");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static void phylink_mac_config(struct phylink *pl,
+ const struct phylink_link_state *state)
+{
+ netdev_dbg(pl->netdev,
+ "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
+ __func__, phylink_an_mode_str(pl->link_an_mode),
+ phy_modes(state->interface),
+ phy_speed_to_str(state->speed),
+ phy_duplex_to_str(state->duplex),
+ __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
+ state->pause, state->link, state->an_enabled);
+
+ pl->ops->mac_config(pl->netdev, pl->link_an_mode, state);
+}
+
+static void phylink_mac_an_restart(struct phylink *pl)
+{
+ if (pl->link_config.an_enabled &&
+ (pl->link_config.interface == PHY_INTERFACE_MODE_1000BASEX ||
+ pl->link_config.interface == PHY_INTERFACE_MODE_2500BASEX))
+ pl->ops->mac_an_restart(pl->netdev);
+}
+
+static int phylink_get_mac_state(struct phylink *pl, struct phylink_link_state *state)
+{
+ struct net_device *ndev = pl->netdev;
+
+ linkmode_copy(state->advertising, pl->link_config.advertising);
+ linkmode_zero(state->lp_advertising);
+ state->interface = pl->link_config.interface;
+ state->an_enabled = pl->link_config.an_enabled;
+ state->link = 1;
+
+ return pl->ops->mac_link_state(ndev, state);
+}
+
+/* The fixed state is... fixed except for the link state,
+ * which may be determined by a GPIO.
+ */
+static void phylink_get_fixed_state(struct phylink *pl, struct phylink_link_state *state)
+{
+ *state = pl->link_config;
+ if (pl->link_gpio)
+ state->link = !!gpiod_get_value(pl->link_gpio);
+}
+
+/* Flow control is resolved according to our and the link partners
+ * advertisments using the following drawn from the 802.3 specs:
+ * Local device Link partner
+ * Pause AsymDir Pause AsymDir Result
+ * 1 X 1 X TX+RX
+ * 0 1 1 1 RX
+ * 1 1 0 1 TX
+ */
+static void phylink_resolve_flow(struct phylink *pl,
+ struct phylink_link_state *state)
+{
+ int new_pause = 0;
+
+ if (pl->link_config.pause & MLO_PAUSE_AN) {
+ int pause = 0;
+
+ if (phylink_test(pl->link_config.advertising, Pause))
+ pause |= MLO_PAUSE_SYM;
+ if (phylink_test(pl->link_config.advertising, Asym_Pause))
+ pause |= MLO_PAUSE_ASYM;
+
+ pause &= state->pause;
+
+ if (pause & MLO_PAUSE_SYM)
+ new_pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
+ else if (pause & MLO_PAUSE_ASYM)
+ new_pause = state->pause & MLO_PAUSE_SYM ?
+ MLO_PAUSE_RX : MLO_PAUSE_TX;
+ } else {
+ new_pause = pl->link_config.pause & MLO_PAUSE_TXRX_MASK;
+ }
+
+ state->pause &= ~MLO_PAUSE_TXRX_MASK;
+ state->pause |= new_pause;
+}
+
+static const char *phylink_pause_to_str(int pause)
+{
+ switch (pause & MLO_PAUSE_TXRX_MASK) {
+ case MLO_PAUSE_TX | MLO_PAUSE_RX:
+ return "rx/tx";
+ case MLO_PAUSE_TX:
+ return "tx";
+ case MLO_PAUSE_RX:
+ return "rx";
+ default:
+ return "off";
+ }
+}
+
+static void phylink_resolve(struct work_struct *w)
+{
+ struct phylink *pl = container_of(w, struct phylink, resolve);
+ struct phylink_link_state link_state;
+ struct net_device *ndev = pl->netdev;
+
+ mutex_lock(&pl->state_mutex);
+ if (pl->phylink_disable_state) {
+ pl->mac_link_dropped = false;
+ link_state.link = false;
+ } else if (pl->mac_link_dropped) {
+ link_state.link = false;
+ } else {
+ switch (pl->link_an_mode) {
+ case MLO_AN_PHY:
+ link_state = pl->phy_state;
+ phylink_resolve_flow(pl, &link_state);
+ phylink_mac_config(pl, &link_state);
+ break;
+
+ case MLO_AN_FIXED:
+ phylink_get_fixed_state(pl, &link_state);
+ phylink_mac_config(pl, &link_state);
+ break;
+
+ case MLO_AN_SGMII:
+ phylink_get_mac_state(pl, &link_state);
+ if (pl->phydev) {
+ bool changed = false;
+
+ link_state.link = link_state.link &&
+ pl->phy_state.link;
+
+ if (pl->phy_state.interface !=
+ link_state.interface) {
+ link_state.interface = pl->phy_state.interface;
+ changed = true;
+ }
+
+ /* Propagate the flow control from the PHY
+ * to the MAC. Also propagate the interface
+ * if changed.
+ */
+ if (pl->phy_state.link || changed) {
+ link_state.pause |= pl->phy_state.pause;
+ phylink_resolve_flow(pl, &link_state);
+
+ phylink_mac_config(pl, &link_state);
+ }
+ }
+ break;
+
+ case MLO_AN_8023Z:
+ phylink_get_mac_state(pl, &link_state);
+ break;
+ }
+ }
+
+ if (link_state.link != netif_carrier_ok(ndev)) {
+ if (!link_state.link) {
+ netif_carrier_off(ndev);
+ pl->ops->mac_link_down(ndev, pl->link_an_mode);
+ netdev_info(ndev, "Link is Down\n");
+ } else {
+ pl->ops->mac_link_up(ndev, pl->link_an_mode,
+ pl->phydev);
+
+ netif_carrier_on(ndev);
+
+ netdev_info(ndev,
+ "Link is Up - %s/%s - flow control %s\n",
+ phy_speed_to_str(link_state.speed),
+ phy_duplex_to_str(link_state.duplex),
+ phylink_pause_to_str(link_state.pause));
+ }
+ }
+ if (!link_state.link && pl->mac_link_dropped) {
+ pl->mac_link_dropped = false;
+ queue_work(system_power_efficient_wq, &pl->resolve);
+ }
+ mutex_unlock(&pl->state_mutex);
+}
+
+static void phylink_run_resolve(struct phylink *pl)
+{
+ if (!pl->phylink_disable_state)
+ queue_work(system_power_efficient_wq, &pl->resolve);
+}
+
+struct phylink *phylink_create(struct net_device *ndev, struct device_node *np,
+ phy_interface_t iface, const struct phylink_mac_ops *ops)
+{
+ struct phylink *pl;
+ int ret;
+
+ pl = kzalloc(sizeof(*pl), GFP_KERNEL);
+ if (!pl)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&pl->state_mutex);
+ INIT_WORK(&pl->resolve, phylink_resolve);
+ pl->netdev = ndev;
+ pl->phy_state.interface = iface;
+ pl->link_interface = iface;
+ pl->link_port = PORT_MII;
+ pl->link_config.interface = iface;
+ pl->link_config.pause = MLO_PAUSE_AN;
+ pl->link_config.speed = SPEED_UNKNOWN;
+ pl->link_config.duplex = DUPLEX_UNKNOWN;
+ pl->ops = ops;
+ __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
+
+ bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
+ linkmode_copy(pl->link_config.advertising, pl->supported);
+ phylink_validate(pl, pl->supported, &pl->link_config);
+
+ ret = phylink_parse_mode(pl, np);
+ if (ret < 0) {
+ kfree(pl);
+ return ERR_PTR(ret);
+ }
+
+ if (pl->link_an_mode == MLO_AN_FIXED) {
+ ret = phylink_parse_fixedlink(pl, np);
+ if (ret < 0) {
+ kfree(pl);
+ return ERR_PTR(ret);
+ }
+ }
+
+ return pl;
+}
+EXPORT_SYMBOL_GPL(phylink_create);
+
+void phylink_destroy(struct phylink *pl)
+{
+ cancel_work_sync(&pl->resolve);
+ kfree(pl);
+}
+EXPORT_SYMBOL_GPL(phylink_destroy);
+
+void phylink_phy_change(struct phy_device *phydev, bool up, bool do_carrier)
+{
+ struct phylink *pl = phydev->phylink;
+
+ mutex_lock(&pl->state_mutex);
+ pl->phy_state.speed = phydev->speed;
+ pl->phy_state.duplex = phydev->duplex;
+ pl->phy_state.pause = MLO_PAUSE_NONE;
+ if (phydev->pause)
+ pl->phy_state.pause |= MLO_PAUSE_SYM;
+ if (phydev->asym_pause)
+ pl->phy_state.pause |= MLO_PAUSE_ASYM;
+ pl->phy_state.interface = phydev->interface;
+ pl->phy_state.link = up;
+ mutex_unlock(&pl->state_mutex);
+
+ phylink_run_resolve(pl);
+
+ netdev_dbg(pl->netdev, "phy link %s %s/%s/%s\n", up ? "up" : "down",
+ phy_modes(phydev->interface),
+ phy_speed_to_str(phydev->speed),
+ phy_duplex_to_str(phydev->duplex));
+}
+
+static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy)
+{
+ struct phylink_link_state config;
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
+ u32 advertising;
+ int ret;
+
+ memset(&config, 0, sizeof(config));
+ ethtool_convert_legacy_u32_to_link_mode(supported, phy->supported);
+ ethtool_convert_legacy_u32_to_link_mode(config.advertising,
+ phy->advertising);
+ config.interface = pl->link_config.interface;
+
+ /*
+ * This is the new way of dealing with flow control for PHYs,
+ * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
+ * phy drivers should not set SUPPORTED_[Asym_]Pause") except
+ * using our validate call to the MAC, we rely upon the MAC
+ * clearing the bits from both supported and advertising fields.
+ */
+ if (phylink_test(supported, Pause))
+ phylink_set(config.advertising, Pause);
+ if (phylink_test(supported, Asym_Pause))
+ phylink_set(config.advertising, Asym_Pause);
+
+ ret = phylink_validate(pl, supported, &config);
+ if (ret)
+ return ret;
+
+ phy->phylink = pl;
+ phy->phy_link_change = phylink_phy_change;
+
+ netdev_info(pl->netdev,
+ "PHY [%s] driver [%s]\n", dev_name(&phy->mdio.dev),
+ phy->drv->name);
+
+ mutex_lock(&phy->lock);
+ mutex_lock(&pl->state_mutex);
+ pl->netdev->phydev = phy;
+ pl->phydev = phy;
+ linkmode_copy(pl->supported, supported);
+ linkmode_copy(pl->link_config.advertising, config.advertising);
+
+ /* Restrict the phy advertisment according to the MAC support. */
+ ethtool_convert_link_mode_to_legacy_u32(&advertising, config.advertising);
+ phy->advertising = advertising;
+ mutex_unlock(&pl->state_mutex);
+ mutex_unlock(&phy->lock);
+
+ netdev_dbg(pl->netdev,
+ "phy: setting supported %*pb advertising 0x%08x\n",
+ __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
+ phy->advertising);
+
+ phy_start_machine(phy);
+ if (phy->irq > 0)
+ phy_start_interrupts(phy);
+
+ return 0;
+}
+
+int phylink_connect_phy(struct phylink *pl, struct phy_device *phy)
+{
+ int ret;
+
+ ret = phy_attach_direct(pl->netdev, phy, 0, pl->link_interface);
+ if (ret)
+ return ret;
+
+ ret = phylink_bringup_phy(pl, phy);
+ if (ret)
+ phy_detach(phy);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phylink_connect_phy);
+
+int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn)
+{
+ struct device_node *phy_node;
+ struct phy_device *phy_dev;
+ int ret;
+
+ /* Fixed links are handled without needing a PHY */
+ if (pl->link_an_mode == MLO_AN_FIXED)
+ return 0;
+
+ phy_node = of_parse_phandle(dn, "phy-handle", 0);
+ if (!phy_node)
+ phy_node = of_parse_phandle(dn, "phy", 0);
+ if (!phy_node)
+ phy_node = of_parse_phandle(dn, "phy-device", 0);
+
+ if (!phy_node) {
+ if (pl->link_an_mode == MLO_AN_PHY) {
+ netdev_err(pl->netdev, "unable to find PHY node\n");
+ return -ENODEV;
+ }
+ return 0;
+ }
+
+ phy_dev = of_phy_attach(pl->netdev, phy_node, 0, pl->link_interface);
+ /* We're done with the phy_node handle */
+ of_node_put(phy_node);
+
+ if (!phy_dev)
+ return -ENODEV;
+
+ ret = phylink_bringup_phy(pl, phy_dev);
+ if (ret)
+ phy_detach(phy_dev);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phylink_of_phy_connect);
+
+void phylink_disconnect_phy(struct phylink *pl)
+{
+ struct phy_device *phy;
+
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ phy = pl->phydev;
+ if (phy) {
+ mutex_lock(&phy->lock);
+ mutex_lock(&pl->state_mutex);
+ pl->netdev->phydev = NULL;
+ pl->phydev = NULL;
+ mutex_unlock(&pl->state_mutex);
+ mutex_unlock(&phy->lock);
+ flush_work(&pl->resolve);
+
+ phy_disconnect(phy);
+ }
+}
+EXPORT_SYMBOL_GPL(phylink_disconnect_phy);
+
+void phylink_mac_change(struct phylink *pl, bool up)
+{
+ if (!up)
+ pl->mac_link_dropped = true;
+ phylink_run_resolve(pl);
+ netdev_dbg(pl->netdev, "mac link %s\n", up ? "up" : "down");
+}
+EXPORT_SYMBOL_GPL(phylink_mac_change);
+
+void phylink_start(struct phylink *pl)
+{
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ netdev_info(pl->netdev, "configuring for %s/%s link mode\n",
+ phylink_an_mode_str(pl->link_an_mode),
+ phy_modes(pl->link_config.interface));
+
+ /* Apply the link configuration to the MAC when starting. This allows
+ * a fixed-link to start with the correct parameters, and also
+ * ensures that we set the appropriate advertisment for Serdes links.
+ */
+ phylink_resolve_flow(pl, &pl->link_config);
+ phylink_mac_config(pl, &pl->link_config);
+
+ clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
+ phylink_run_resolve(pl);
+
+ if (pl->phydev)
+ phy_start(pl->phydev);
+}
+EXPORT_SYMBOL_GPL(phylink_start);
+
+void phylink_stop(struct phylink *pl)
+{
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ if (pl->phydev)
+ phy_stop(pl->phydev);
+
+ set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
+ flush_work(&pl->resolve);
+}
+EXPORT_SYMBOL_GPL(phylink_stop);
+
+void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
+{
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ wol->supported = 0;
+ wol->wolopts = 0;
+
+ if (pl->phydev)
+ phy_ethtool_get_wol(pl->phydev, wol);
+}
+EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol);
+
+int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
+{
+ int ret = -EOPNOTSUPP;
+
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ if (pl->phydev)
+ ret = phy_ethtool_set_wol(pl->phydev, wol);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol);
+
+static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b)
+{
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(mask);
+
+ linkmode_zero(mask);
+ phylink_set_port_modes(mask);
+
+ linkmode_and(dst, dst, mask);
+ linkmode_or(dst, dst, b);
+}
+
+static void phylink_get_ksettings(const struct phylink_link_state *state,
+ struct ethtool_link_ksettings *kset)
+{
+ phylink_merge_link_mode(kset->link_modes.advertising, state->advertising);
+ linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising);
+ kset->base.speed = state->speed;
+ kset->base.duplex = state->duplex;
+ kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE :
+ AUTONEG_DISABLE;
+}
+
+int phylink_ethtool_ksettings_get(struct phylink *pl,
+ struct ethtool_link_ksettings *kset)
+{
+ struct phylink_link_state link_state;
+
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ if (pl->phydev) {
+ phy_ethtool_ksettings_get(pl->phydev, kset);
+ } else {
+ kset->base.port = pl->link_port;
+ }
+
+ linkmode_copy(kset->link_modes.supported, pl->supported);
+
+ switch (pl->link_an_mode) {
+ case MLO_AN_FIXED:
+ /* We are using fixed settings. Report these as the
+ * current link settings - and note that these also
+ * represent the supported speeds/duplex/pause modes.
+ */
+ phylink_get_fixed_state(pl, &link_state);
+ phylink_get_ksettings(&link_state, kset);
+ break;
+
+ case MLO_AN_SGMII:
+ /* If there is a phy attached, then use the reported
+ * settings from the phy with no modification.
+ */
+ if (pl->phydev)
+ break;
+
+ case MLO_AN_8023Z:
+ phylink_get_mac_state(pl, &link_state);
+
+ /* The MAC is reporting the link results from its own PCS
+ * layer via in-band status. Report these as the current
+ * link settings.
+ */
+ phylink_get_ksettings(&link_state, kset);
+ break;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get);
+
+int phylink_ethtool_ksettings_set(struct phylink *pl,
+ const struct ethtool_link_ksettings *kset)
+{
+ struct ethtool_link_ksettings our_kset;
+ struct phylink_link_state config;
+ int ret;
+
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ if (kset->base.autoneg != AUTONEG_DISABLE &&
+ kset->base.autoneg != AUTONEG_ENABLE)
+ return -EINVAL;
+
+ config = pl->link_config;
+
+ /* Mask out unsupported advertisments */
+ linkmode_and(config.advertising, kset->link_modes.advertising,
+ pl->supported);
+
+ /* FIXME: should we reject autoneg if phy/mac does not support it? */
+ if (kset->base.autoneg == AUTONEG_DISABLE) {
+ const struct phy_setting *s;
+
+ /* Autonegotiation disabled, select a suitable speed and
+ * duplex.
+ */
+ s = phy_lookup_setting(kset->base.speed, kset->base.duplex,
+ pl->supported,
+ __ETHTOOL_LINK_MODE_MASK_NBITS, false);
+ if (!s)
+ return -EINVAL;
+
+ /* If we have a fixed link (as specified by firmware), refuse
+ * to change link parameters.
+ */
+ if (pl->link_an_mode == MLO_AN_FIXED &&
+ (s->speed != pl->link_config.speed ||
+ s->duplex != pl->link_config.duplex))
+ return -EINVAL;
+
+ config.speed = s->speed;
+ config.duplex = s->duplex;
+ config.an_enabled = false;
+
+ __clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
+ } else {
+ /* If we have a fixed link, refuse to enable autonegotiation */
+ if (pl->link_an_mode == MLO_AN_FIXED)
+ return -EINVAL;
+
+ config.speed = SPEED_UNKNOWN;
+ config.duplex = DUPLEX_UNKNOWN;
+ config.an_enabled = true;
+
+ __set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
+ }
+
+ if (phylink_validate(pl, pl->supported, &config))
+ return -EINVAL;
+
+ /* If autonegotiation is enabled, we must have an advertisment */
+ if (config.an_enabled && phylink_is_empty_linkmode(config.advertising))
+ return -EINVAL;
+
+ our_kset = *kset;
+ linkmode_copy(our_kset.link_modes.advertising, config.advertising);
+ our_kset.base.speed = config.speed;
+ our_kset.base.duplex = config.duplex;
+
+ /* If we have a PHY, configure the phy */
+ if (pl->phydev) {
+ ret = phy_ethtool_ksettings_set(pl->phydev, &our_kset);
+ if (ret)
+ return ret;
+ }
+
+ mutex_lock(&pl->state_mutex);
+ /* Configure the MAC to match the new settings */
+ linkmode_copy(pl->link_config.advertising, our_kset.link_modes.advertising);
+ pl->link_config.speed = our_kset.base.speed;
+ pl->link_config.duplex = our_kset.base.duplex;
+ pl->link_config.an_enabled = our_kset.base.autoneg != AUTONEG_DISABLE;
+
+ if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) {
+ phylink_mac_config(pl, &pl->link_config);
+ phylink_mac_an_restart(pl);
+ }
+ mutex_unlock(&pl->state_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);
+
+int phylink_ethtool_nway_reset(struct phylink *pl)
+{
+ int ret = 0;
+
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ if (pl->phydev)
+ ret = phy_restart_aneg(pl->phydev);
+ phylink_mac_an_restart(pl);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);
+
+void phylink_ethtool_get_pauseparam(struct phylink *pl,
+ struct ethtool_pauseparam *pause)
+{
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN);
+ pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX);
+ pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX);
+}
+EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);
+
+int phylink_ethtool_set_pauseparam(struct phylink *pl,
+ struct ethtool_pauseparam *pause)
+{
+ struct phylink_link_state *config = &pl->link_config;
+
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ if (!phylink_test(pl->supported, Pause) &&
+ !phylink_test(pl->supported, Asym_Pause))
+ return -EOPNOTSUPP;
+
+ if (!phylink_test(pl->supported, Asym_Pause) &&
+ !pause->autoneg && pause->rx_pause != pause->tx_pause)
+ return -EINVAL;
+
+ config->pause &= ~(MLO_PAUSE_AN | MLO_PAUSE_TXRX_MASK);
+
+ if (pause->autoneg)
+ config->pause |= MLO_PAUSE_AN;
+ if (pause->rx_pause)
+ config->pause |= MLO_PAUSE_RX;
+ if (pause->tx_pause)
+ config->pause |= MLO_PAUSE_TX;
+
+ if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) {
+ switch (pl->link_an_mode) {
+ case MLO_AN_PHY:
+ /* Silently mark the carrier down, and then trigger a resolve */
+ netif_carrier_off(pl->netdev);
+ phylink_run_resolve(pl);
+ break;
+
+ case MLO_AN_FIXED:
+ /* Should we allow fixed links to change against the config? */
+ phylink_resolve_flow(pl, config);
+ phylink_mac_config(pl, config);
+ break;
+
+ case MLO_AN_SGMII:
+ case MLO_AN_8023Z:
+ phylink_mac_config(pl, config);
+ phylink_mac_an_restart(pl);
+ break;
+ }
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
+
+int phylink_init_eee(struct phylink *pl, bool clk_stop_enable)
+{
+ int ret = -EPROTONOSUPPORT;
+
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ if (pl->phydev)
+ ret = phy_init_eee(pl->phydev, clk_stop_enable);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phylink_init_eee);
+
+int phylink_get_eee_err(struct phylink *pl)
+{
+ int ret = 0;
+
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ if (pl->phydev)
+ ret = phy_get_eee_err(pl->phydev);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phylink_get_eee_err);
+
+int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee)
+{
+ int ret = -EOPNOTSUPP;
+
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ if (pl->phydev)
+ ret = phy_ethtool_get_eee(pl->phydev, eee);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);
+
+int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee)
+{
+ int ret = -EOPNOTSUPP;
+
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ if (pl->phydev)
+ ret = phy_ethtool_set_eee(pl->phydev, eee);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee);
+
+/* This emulates MII registers for a fixed-mode phy operating as per the
+ * passed in state. "aneg" defines if we report negotiation is possible.
+ *
+ * FIXME: should deal with negotiation state too.
+ */
+static int phylink_mii_emul_read(struct net_device *ndev, unsigned int reg,
+ struct phylink_link_state *state, bool aneg)
+{
+ struct fixed_phy_status fs;
+ int val;
+
+ fs.link = state->link;
+ fs.speed = state->speed;
+ fs.duplex = state->duplex;
+ fs.pause = state->pause & MLO_PAUSE_SYM;
+ fs.asym_pause = state->pause & MLO_PAUSE_ASYM;
+
+ val = swphy_read_reg(reg, &fs);
+ if (reg == MII_BMSR) {
+ if (!state->an_complete)
+ val &= ~BMSR_ANEGCOMPLETE;
+ if (!aneg)
+ val &= ~BMSR_ANEGCAPABLE;
+ }
+ return val;
+}
+
+static int phylink_mii_read(struct phylink *pl, unsigned int phy_id,
+ unsigned int reg)
+{
+ struct phylink_link_state state;
+ int val = 0xffff;
+
+ /* PHYs only exist for MLO_AN_PHY and MLO_AN_SGMII */
+ if (pl->phydev)
+ return mdiobus_read(pl->phydev->mdio.bus, phy_id, reg);
+
+ switch (pl->link_an_mode) {
+ case MLO_AN_FIXED:
+ if (phy_id == 0) {
+ phylink_get_fixed_state(pl, &state);
+ val = phylink_mii_emul_read(pl->netdev, reg, &state,
+ true);
+ }
+ break;
+
+ case MLO_AN_PHY:
+ return -EOPNOTSUPP;
+
+ case MLO_AN_SGMII:
+ /* No phy, fall through to 8023z method */
+ case MLO_AN_8023Z:
+ if (phy_id == 0) {
+ val = phylink_get_mac_state(pl, &state);
+ if (val < 0)
+ return val;
+
+ val = phylink_mii_emul_read(pl->netdev, reg, &state,
+ true);
+ }
+ break;
+ }
+
+ return val & 0xffff;
+}
+
+static int phylink_mii_write(struct phylink *pl, unsigned int phy_id,
+ unsigned int reg, unsigned int val)
+{
+ /* PHYs only exist for MLO_AN_PHY and MLO_AN_SGMII */
+ if (pl->phydev) {
+ mdiobus_write(pl->phydev->mdio.bus, phy_id, reg, val);
+ return 0;
+ }
+
+ switch (pl->link_an_mode) {
+ case MLO_AN_FIXED:
+ break;
+
+ case MLO_AN_PHY:
+ return -EOPNOTSUPP;
+
+ case MLO_AN_SGMII:
+ /* No phy, fall through to 8023z method */
+ case MLO_AN_8023Z:
+ break;
+ }
+
+ return 0;
+}
+
+int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
+{
+ struct mii_ioctl_data *mii_data = if_mii(ifr);
+ int val, ret;
+
+ WARN_ON(!lockdep_rtnl_is_held());
+
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ mii_data->phy_id = pl->phydev ? pl->phydev->mdio.addr : 0;
+ /* fallthrough */
+
+ case SIOCGMIIREG:
+ val = phylink_mii_read(pl, mii_data->phy_id, mii_data->reg_num);
+ if (val < 0) {
+ ret = val;
+ } else {
+ mii_data->val_out = val;
+ ret = 0;
+ }
+ break;
+
+ case SIOCSMIIREG:
+ ret = phylink_mii_write(pl, mii_data->phy_id, mii_data->reg_num,
+ mii_data->val_in);
+ break;
+
+ default:
+ ret = -EOPNOTSUPP;
+ if (pl->phydev)
+ ret = phy_mii_ioctl(pl->phydev, ifr, cmd);
+ break;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
+
+MODULE_LICENSE("GPL");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff