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-rw-r--r--drivers/net/phy/phy.c1725
1 files changed, 1725 insertions, 0 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
new file mode 100644
index 0000000000..df54c137c5
--- /dev/null
+++ b/drivers/net/phy/phy.c
@@ -0,0 +1,1725 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Framework for configuring and reading PHY devices
+ * Based on code in sungem_phy.c and gianfar_phy.c
+ *
+ * Author: Andy Fleming
+ *
+ * Copyright (c) 2004 Freescale Semiconductor, Inc.
+ * Copyright (c) 2006, 2007 Maciej W. Rozycki
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/netlink.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/ethtool_netlink.h>
+#include <linux/phy.h>
+#include <linux/phy_led_triggers.h>
+#include <linux/sfp.h>
+#include <linux/workqueue.h>
+#include <linux/mdio.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/atomic.h>
+#include <linux/suspend.h>
+#include <net/netlink.h>
+#include <net/genetlink.h>
+#include <net/sock.h>
+
+#define PHY_STATE_TIME HZ
+
+#define PHY_STATE_STR(_state) \
+ case PHY_##_state: \
+ return __stringify(_state); \
+
+static const char *phy_state_to_str(enum phy_state st)
+{
+ switch (st) {
+ PHY_STATE_STR(DOWN)
+ PHY_STATE_STR(READY)
+ PHY_STATE_STR(UP)
+ PHY_STATE_STR(RUNNING)
+ PHY_STATE_STR(NOLINK)
+ PHY_STATE_STR(CABLETEST)
+ PHY_STATE_STR(HALTED)
+ PHY_STATE_STR(ERROR)
+ }
+
+ return NULL;
+}
+
+static void phy_process_state_change(struct phy_device *phydev,
+ enum phy_state old_state)
+{
+ if (old_state != phydev->state) {
+ phydev_dbg(phydev, "PHY state change %s -> %s\n",
+ phy_state_to_str(old_state),
+ phy_state_to_str(phydev->state));
+ if (phydev->drv && phydev->drv->link_change_notify)
+ phydev->drv->link_change_notify(phydev);
+ }
+}
+
+static void phy_link_up(struct phy_device *phydev)
+{
+ phydev->phy_link_change(phydev, true);
+ phy_led_trigger_change_speed(phydev);
+}
+
+static void phy_link_down(struct phy_device *phydev)
+{
+ phydev->phy_link_change(phydev, false);
+ phy_led_trigger_change_speed(phydev);
+ WRITE_ONCE(phydev->link_down_events, phydev->link_down_events + 1);
+}
+
+static const char *phy_pause_str(struct phy_device *phydev)
+{
+ bool local_pause, local_asym_pause;
+
+ if (phydev->autoneg == AUTONEG_DISABLE)
+ goto no_pause;
+
+ local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+ phydev->advertising);
+ local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+ phydev->advertising);
+
+ if (local_pause && phydev->pause)
+ return "rx/tx";
+
+ if (local_asym_pause && phydev->asym_pause) {
+ if (local_pause)
+ return "rx";
+ if (phydev->pause)
+ return "tx";
+ }
+
+no_pause:
+ return "off";
+}
+
+/**
+ * phy_print_status - Convenience function to print out the current phy status
+ * @phydev: the phy_device struct
+ */
+void phy_print_status(struct phy_device *phydev)
+{
+ if (phydev->link) {
+ netdev_info(phydev->attached_dev,
+ "Link is Up - %s/%s %s- flow control %s\n",
+ phy_speed_to_str(phydev->speed),
+ phy_duplex_to_str(phydev->duplex),
+ phydev->downshifted_rate ? "(downshifted) " : "",
+ phy_pause_str(phydev));
+ } else {
+ netdev_info(phydev->attached_dev, "Link is Down\n");
+ }
+}
+EXPORT_SYMBOL(phy_print_status);
+
+/**
+ * phy_get_rate_matching - determine if rate matching is supported
+ * @phydev: The phy device to return rate matching for
+ * @iface: The interface mode to use
+ *
+ * This determines the type of rate matching (if any) that @phy supports
+ * using @iface. @iface may be %PHY_INTERFACE_MODE_NA to determine if any
+ * interface supports rate matching.
+ *
+ * Return: The type of rate matching @phy supports for @iface, or
+ * %RATE_MATCH_NONE.
+ */
+int phy_get_rate_matching(struct phy_device *phydev,
+ phy_interface_t iface)
+{
+ int ret = RATE_MATCH_NONE;
+
+ if (phydev->drv->get_rate_matching) {
+ mutex_lock(&phydev->lock);
+ ret = phydev->drv->get_rate_matching(phydev, iface);
+ mutex_unlock(&phydev->lock);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_get_rate_matching);
+
+/**
+ * phy_config_interrupt - configure the PHY device for the requested interrupts
+ * @phydev: the phy_device struct
+ * @interrupts: interrupt flags to configure for this @phydev
+ *
+ * Returns 0 on success or < 0 on error.
+ */
+static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
+{
+ phydev->interrupts = interrupts ? 1 : 0;
+ if (phydev->drv->config_intr)
+ return phydev->drv->config_intr(phydev);
+
+ return 0;
+}
+
+/**
+ * phy_restart_aneg - restart auto-negotiation
+ * @phydev: target phy_device struct
+ *
+ * Restart the autonegotiation on @phydev. Returns >= 0 on success or
+ * negative errno on error.
+ */
+int phy_restart_aneg(struct phy_device *phydev)
+{
+ int ret;
+
+ if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
+ ret = genphy_c45_restart_aneg(phydev);
+ else
+ ret = genphy_restart_aneg(phydev);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_restart_aneg);
+
+/**
+ * phy_aneg_done - return auto-negotiation status
+ * @phydev: target phy_device struct
+ *
+ * Description: Return the auto-negotiation status from this @phydev
+ * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
+ * is still pending.
+ */
+int phy_aneg_done(struct phy_device *phydev)
+{
+ if (phydev->drv && phydev->drv->aneg_done)
+ return phydev->drv->aneg_done(phydev);
+ else if (phydev->is_c45)
+ return genphy_c45_aneg_done(phydev);
+ else
+ return genphy_aneg_done(phydev);
+}
+EXPORT_SYMBOL(phy_aneg_done);
+
+/**
+ * phy_find_valid - find a PHY setting that matches the requested parameters
+ * @speed: desired speed
+ * @duplex: desired duplex
+ * @supported: mask of supported link modes
+ *
+ * Locate a supported phy setting that is, in priority order:
+ * - an exact match for the specified speed and duplex mode
+ * - a match for the specified speed, or slower speed
+ * - the slowest supported speed
+ * Returns the matched phy_setting entry, or %NULL if no supported phy
+ * settings were found.
+ */
+static const struct phy_setting *
+phy_find_valid(int speed, int duplex, unsigned long *supported)
+{
+ return phy_lookup_setting(speed, duplex, supported, false);
+}
+
+/**
+ * phy_supported_speeds - return all speeds currently supported by a phy device
+ * @phy: The phy device to return supported speeds of.
+ * @speeds: buffer to store supported speeds in.
+ * @size: size of speeds buffer.
+ *
+ * Description: Returns the number of supported speeds, and fills the speeds
+ * buffer with the supported speeds. If speeds buffer is too small to contain
+ * all currently supported speeds, will return as many speeds as can fit.
+ */
+unsigned int phy_supported_speeds(struct phy_device *phy,
+ unsigned int *speeds,
+ unsigned int size)
+{
+ return phy_speeds(speeds, size, phy->supported);
+}
+
+/**
+ * phy_check_valid - check if there is a valid PHY setting which matches
+ * speed, duplex, and feature mask
+ * @speed: speed to match
+ * @duplex: duplex to match
+ * @features: A mask of the valid settings
+ *
+ * Description: Returns true if there is a valid setting, false otherwise.
+ */
+bool phy_check_valid(int speed, int duplex, unsigned long *features)
+{
+ return !!phy_lookup_setting(speed, duplex, features, true);
+}
+EXPORT_SYMBOL(phy_check_valid);
+
+/**
+ * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
+ * @phydev: the target phy_device struct
+ *
+ * Description: Make sure the PHY is set to supported speeds and
+ * duplexes. Drop down by one in this order: 1000/FULL,
+ * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
+ */
+static void phy_sanitize_settings(struct phy_device *phydev)
+{
+ const struct phy_setting *setting;
+
+ setting = phy_find_valid(phydev->speed, phydev->duplex,
+ phydev->supported);
+ if (setting) {
+ phydev->speed = setting->speed;
+ phydev->duplex = setting->duplex;
+ } else {
+ /* We failed to find anything (no supported speeds?) */
+ phydev->speed = SPEED_UNKNOWN;
+ phydev->duplex = DUPLEX_UNKNOWN;
+ }
+}
+
+void phy_ethtool_ksettings_get(struct phy_device *phydev,
+ struct ethtool_link_ksettings *cmd)
+{
+ mutex_lock(&phydev->lock);
+ linkmode_copy(cmd->link_modes.supported, phydev->supported);
+ linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
+ linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
+
+ cmd->base.speed = phydev->speed;
+ cmd->base.duplex = phydev->duplex;
+ cmd->base.master_slave_cfg = phydev->master_slave_get;
+ cmd->base.master_slave_state = phydev->master_slave_state;
+ cmd->base.rate_matching = phydev->rate_matching;
+ if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
+ cmd->base.port = PORT_BNC;
+ else
+ cmd->base.port = phydev->port;
+ cmd->base.transceiver = phy_is_internal(phydev) ?
+ XCVR_INTERNAL : XCVR_EXTERNAL;
+ cmd->base.phy_address = phydev->mdio.addr;
+ cmd->base.autoneg = phydev->autoneg;
+ cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
+ cmd->base.eth_tp_mdix = phydev->mdix;
+ mutex_unlock(&phydev->lock);
+}
+EXPORT_SYMBOL(phy_ethtool_ksettings_get);
+
+/**
+ * phy_mii_ioctl - generic PHY MII ioctl interface
+ * @phydev: the phy_device struct
+ * @ifr: &struct ifreq for socket ioctl's
+ * @cmd: ioctl cmd to execute
+ *
+ * Note that this function is currently incompatible with the
+ * PHYCONTROL layer. It changes registers without regard to
+ * current state. Use at own risk.
+ */
+int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
+{
+ struct mii_ioctl_data *mii_data = if_mii(ifr);
+ u16 val = mii_data->val_in;
+ bool change_autoneg = false;
+ int prtad, devad;
+
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ mii_data->phy_id = phydev->mdio.addr;
+ fallthrough;
+
+ case SIOCGMIIREG:
+ if (mdio_phy_id_is_c45(mii_data->phy_id)) {
+ prtad = mdio_phy_id_prtad(mii_data->phy_id);
+ devad = mdio_phy_id_devad(mii_data->phy_id);
+ mii_data->val_out = mdiobus_c45_read(
+ phydev->mdio.bus, prtad, devad,
+ mii_data->reg_num);
+ } else {
+ mii_data->val_out = mdiobus_read(
+ phydev->mdio.bus, mii_data->phy_id,
+ mii_data->reg_num);
+ }
+ return 0;
+
+ case SIOCSMIIREG:
+ if (mdio_phy_id_is_c45(mii_data->phy_id)) {
+ prtad = mdio_phy_id_prtad(mii_data->phy_id);
+ devad = mdio_phy_id_devad(mii_data->phy_id);
+ } else {
+ prtad = mii_data->phy_id;
+ devad = mii_data->reg_num;
+ }
+ if (prtad == phydev->mdio.addr) {
+ switch (devad) {
+ case MII_BMCR:
+ if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
+ if (phydev->autoneg == AUTONEG_ENABLE)
+ change_autoneg = true;
+ phydev->autoneg = AUTONEG_DISABLE;
+ if (val & BMCR_FULLDPLX)
+ phydev->duplex = DUPLEX_FULL;
+ else
+ phydev->duplex = DUPLEX_HALF;
+ if (val & BMCR_SPEED1000)
+ phydev->speed = SPEED_1000;
+ else if (val & BMCR_SPEED100)
+ phydev->speed = SPEED_100;
+ else phydev->speed = SPEED_10;
+ } else {
+ if (phydev->autoneg == AUTONEG_DISABLE)
+ change_autoneg = true;
+ phydev->autoneg = AUTONEG_ENABLE;
+ }
+ break;
+ case MII_ADVERTISE:
+ mii_adv_mod_linkmode_adv_t(phydev->advertising,
+ val);
+ change_autoneg = true;
+ break;
+ case MII_CTRL1000:
+ mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
+ val);
+ change_autoneg = true;
+ break;
+ default:
+ /* do nothing */
+ break;
+ }
+ }
+
+ if (mdio_phy_id_is_c45(mii_data->phy_id))
+ mdiobus_c45_write(phydev->mdio.bus, prtad, devad,
+ mii_data->reg_num, val);
+ else
+ mdiobus_write(phydev->mdio.bus, prtad, devad, val);
+
+ if (prtad == phydev->mdio.addr &&
+ devad == MII_BMCR &&
+ val & BMCR_RESET)
+ return phy_init_hw(phydev);
+
+ if (change_autoneg)
+ return phy_start_aneg(phydev);
+
+ return 0;
+
+ case SIOCSHWTSTAMP:
+ if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
+ return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
+ fallthrough;
+
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+EXPORT_SYMBOL(phy_mii_ioctl);
+
+/**
+ * phy_do_ioctl - generic ndo_eth_ioctl implementation
+ * @dev: the net_device struct
+ * @ifr: &struct ifreq for socket ioctl's
+ * @cmd: ioctl cmd to execute
+ */
+int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ if (!dev->phydev)
+ return -ENODEV;
+
+ return phy_mii_ioctl(dev->phydev, ifr, cmd);
+}
+EXPORT_SYMBOL(phy_do_ioctl);
+
+/**
+ * phy_do_ioctl_running - generic ndo_eth_ioctl implementation but test first
+ *
+ * @dev: the net_device struct
+ * @ifr: &struct ifreq for socket ioctl's
+ * @cmd: ioctl cmd to execute
+ *
+ * Same as phy_do_ioctl, but ensures that net_device is running before
+ * handling the ioctl.
+ */
+int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ if (!netif_running(dev))
+ return -ENODEV;
+
+ return phy_do_ioctl(dev, ifr, cmd);
+}
+EXPORT_SYMBOL(phy_do_ioctl_running);
+
+/**
+ * __phy_hwtstamp_get - Get hardware timestamping configuration from PHY
+ *
+ * @phydev: the PHY device structure
+ * @config: structure holding the timestamping configuration
+ *
+ * Query the PHY device for its current hardware timestamping configuration.
+ */
+int __phy_hwtstamp_get(struct phy_device *phydev,
+ struct kernel_hwtstamp_config *config)
+{
+ if (!phydev)
+ return -ENODEV;
+
+ return phy_mii_ioctl(phydev, config->ifr, SIOCGHWTSTAMP);
+}
+
+/**
+ * __phy_hwtstamp_set - Modify PHY hardware timestamping configuration
+ *
+ * @phydev: the PHY device structure
+ * @config: structure holding the timestamping configuration
+ * @extack: netlink extended ack structure, for error reporting
+ */
+int __phy_hwtstamp_set(struct phy_device *phydev,
+ struct kernel_hwtstamp_config *config,
+ struct netlink_ext_ack *extack)
+{
+ if (!phydev)
+ return -ENODEV;
+
+ return phy_mii_ioctl(phydev, config->ifr, SIOCSHWTSTAMP);
+}
+
+/**
+ * phy_queue_state_machine - Trigger the state machine to run soon
+ *
+ * @phydev: the phy_device struct
+ * @jiffies: Run the state machine after these jiffies
+ */
+void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
+{
+ mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
+ jiffies);
+}
+EXPORT_SYMBOL(phy_queue_state_machine);
+
+/**
+ * phy_trigger_machine - Trigger the state machine to run now
+ *
+ * @phydev: the phy_device struct
+ */
+void phy_trigger_machine(struct phy_device *phydev)
+{
+ phy_queue_state_machine(phydev, 0);
+}
+EXPORT_SYMBOL(phy_trigger_machine);
+
+static void phy_abort_cable_test(struct phy_device *phydev)
+{
+ int err;
+
+ ethnl_cable_test_finished(phydev);
+
+ err = phy_init_hw(phydev);
+ if (err)
+ phydev_err(phydev, "Error while aborting cable test");
+}
+
+/**
+ * phy_ethtool_get_strings - Get the statistic counter names
+ *
+ * @phydev: the phy_device struct
+ * @data: Where to put the strings
+ */
+int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data)
+{
+ if (!phydev->drv)
+ return -EIO;
+
+ mutex_lock(&phydev->lock);
+ phydev->drv->get_strings(phydev, data);
+ mutex_unlock(&phydev->lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(phy_ethtool_get_strings);
+
+/**
+ * phy_ethtool_get_sset_count - Get the number of statistic counters
+ *
+ * @phydev: the phy_device struct
+ */
+int phy_ethtool_get_sset_count(struct phy_device *phydev)
+{
+ int ret;
+
+ if (!phydev->drv)
+ return -EIO;
+
+ if (phydev->drv->get_sset_count &&
+ phydev->drv->get_strings &&
+ phydev->drv->get_stats) {
+ mutex_lock(&phydev->lock);
+ ret = phydev->drv->get_sset_count(phydev);
+ mutex_unlock(&phydev->lock);
+
+ return ret;
+ }
+
+ return -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(phy_ethtool_get_sset_count);
+
+/**
+ * phy_ethtool_get_stats - Get the statistic counters
+ *
+ * @phydev: the phy_device struct
+ * @stats: What counters to get
+ * @data: Where to store the counters
+ */
+int phy_ethtool_get_stats(struct phy_device *phydev,
+ struct ethtool_stats *stats, u64 *data)
+{
+ if (!phydev->drv)
+ return -EIO;
+
+ mutex_lock(&phydev->lock);
+ phydev->drv->get_stats(phydev, stats, data);
+ mutex_unlock(&phydev->lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(phy_ethtool_get_stats);
+
+/**
+ * phy_ethtool_get_plca_cfg - Get PLCA RS configuration
+ * @phydev: the phy_device struct
+ * @plca_cfg: where to store the retrieved configuration
+ *
+ * Retrieve the PLCA configuration from the PHY. Return 0 on success or a
+ * negative value if an error occurred.
+ */
+int phy_ethtool_get_plca_cfg(struct phy_device *phydev,
+ struct phy_plca_cfg *plca_cfg)
+{
+ int ret;
+
+ if (!phydev->drv) {
+ ret = -EIO;
+ goto out;
+ }
+
+ if (!phydev->drv->get_plca_cfg) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ mutex_lock(&phydev->lock);
+ ret = phydev->drv->get_plca_cfg(phydev, plca_cfg);
+
+ mutex_unlock(&phydev->lock);
+out:
+ return ret;
+}
+
+/**
+ * plca_check_valid - Check PLCA configuration before enabling
+ * @phydev: the phy_device struct
+ * @plca_cfg: current PLCA configuration
+ * @extack: extack for reporting useful error messages
+ *
+ * Checks whether the PLCA and PHY configuration are consistent and it is safe
+ * to enable PLCA. Returns 0 on success or a negative value if the PLCA or PHY
+ * configuration is not consistent.
+ */
+static int plca_check_valid(struct phy_device *phydev,
+ const struct phy_plca_cfg *plca_cfg,
+ struct netlink_ext_ack *extack)
+{
+ int ret = 0;
+
+ if (!linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT,
+ phydev->advertising)) {
+ ret = -EOPNOTSUPP;
+ NL_SET_ERR_MSG(extack,
+ "Point to Multi-Point mode is not enabled");
+ } else if (plca_cfg->node_id >= 255) {
+ NL_SET_ERR_MSG(extack, "PLCA node ID is not set");
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+/**
+ * phy_ethtool_set_plca_cfg - Set PLCA RS configuration
+ * @phydev: the phy_device struct
+ * @plca_cfg: new PLCA configuration to apply
+ * @extack: extack for reporting useful error messages
+ *
+ * Sets the PLCA configuration in the PHY. Return 0 on success or a
+ * negative value if an error occurred.
+ */
+int phy_ethtool_set_plca_cfg(struct phy_device *phydev,
+ const struct phy_plca_cfg *plca_cfg,
+ struct netlink_ext_ack *extack)
+{
+ struct phy_plca_cfg *curr_plca_cfg;
+ int ret;
+
+ if (!phydev->drv) {
+ ret = -EIO;
+ goto out;
+ }
+
+ if (!phydev->drv->set_plca_cfg ||
+ !phydev->drv->get_plca_cfg) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ curr_plca_cfg = kmalloc(sizeof(*curr_plca_cfg), GFP_KERNEL);
+ if (!curr_plca_cfg) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ mutex_lock(&phydev->lock);
+
+ ret = phydev->drv->get_plca_cfg(phydev, curr_plca_cfg);
+ if (ret)
+ goto out_drv;
+
+ if (curr_plca_cfg->enabled < 0 && plca_cfg->enabled >= 0) {
+ NL_SET_ERR_MSG(extack,
+ "PHY does not support changing the PLCA 'enable' attribute");
+ ret = -EINVAL;
+ goto out_drv;
+ }
+
+ if (curr_plca_cfg->node_id < 0 && plca_cfg->node_id >= 0) {
+ NL_SET_ERR_MSG(extack,
+ "PHY does not support changing the PLCA 'local node ID' attribute");
+ ret = -EINVAL;
+ goto out_drv;
+ }
+
+ if (curr_plca_cfg->node_cnt < 0 && plca_cfg->node_cnt >= 0) {
+ NL_SET_ERR_MSG(extack,
+ "PHY does not support changing the PLCA 'node count' attribute");
+ ret = -EINVAL;
+ goto out_drv;
+ }
+
+ if (curr_plca_cfg->to_tmr < 0 && plca_cfg->to_tmr >= 0) {
+ NL_SET_ERR_MSG(extack,
+ "PHY does not support changing the PLCA 'TO timer' attribute");
+ ret = -EINVAL;
+ goto out_drv;
+ }
+
+ if (curr_plca_cfg->burst_cnt < 0 && plca_cfg->burst_cnt >= 0) {
+ NL_SET_ERR_MSG(extack,
+ "PHY does not support changing the PLCA 'burst count' attribute");
+ ret = -EINVAL;
+ goto out_drv;
+ }
+
+ if (curr_plca_cfg->burst_tmr < 0 && plca_cfg->burst_tmr >= 0) {
+ NL_SET_ERR_MSG(extack,
+ "PHY does not support changing the PLCA 'burst timer' attribute");
+ ret = -EINVAL;
+ goto out_drv;
+ }
+
+ // if enabling PLCA, perform a few sanity checks
+ if (plca_cfg->enabled > 0) {
+ // allow setting node_id concurrently with enabled
+ if (plca_cfg->node_id >= 0)
+ curr_plca_cfg->node_id = plca_cfg->node_id;
+
+ ret = plca_check_valid(phydev, curr_plca_cfg, extack);
+ if (ret)
+ goto out_drv;
+ }
+
+ ret = phydev->drv->set_plca_cfg(phydev, plca_cfg);
+
+out_drv:
+ kfree(curr_plca_cfg);
+ mutex_unlock(&phydev->lock);
+out:
+ return ret;
+}
+
+/**
+ * phy_ethtool_get_plca_status - Get PLCA RS status information
+ * @phydev: the phy_device struct
+ * @plca_st: where to store the retrieved status information
+ *
+ * Retrieve the PLCA status information from the PHY. Return 0 on success or a
+ * negative value if an error occurred.
+ */
+int phy_ethtool_get_plca_status(struct phy_device *phydev,
+ struct phy_plca_status *plca_st)
+{
+ int ret;
+
+ if (!phydev->drv) {
+ ret = -EIO;
+ goto out;
+ }
+
+ if (!phydev->drv->get_plca_status) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ mutex_lock(&phydev->lock);
+ ret = phydev->drv->get_plca_status(phydev, plca_st);
+
+ mutex_unlock(&phydev->lock);
+out:
+ return ret;
+}
+
+/**
+ * phy_start_cable_test - Start a cable test
+ *
+ * @phydev: the phy_device struct
+ * @extack: extack for reporting useful error messages
+ */
+int phy_start_cable_test(struct phy_device *phydev,
+ struct netlink_ext_ack *extack)
+{
+ struct net_device *dev = phydev->attached_dev;
+ int err = -ENOMEM;
+
+ if (!(phydev->drv &&
+ phydev->drv->cable_test_start &&
+ phydev->drv->cable_test_get_status)) {
+ NL_SET_ERR_MSG(extack,
+ "PHY driver does not support cable testing");
+ return -EOPNOTSUPP;
+ }
+
+ mutex_lock(&phydev->lock);
+ if (phydev->state == PHY_CABLETEST) {
+ NL_SET_ERR_MSG(extack,
+ "PHY already performing a test");
+ err = -EBUSY;
+ goto out;
+ }
+
+ if (phydev->state < PHY_UP ||
+ phydev->state > PHY_CABLETEST) {
+ NL_SET_ERR_MSG(extack,
+ "PHY not configured. Try setting interface up");
+ err = -EBUSY;
+ goto out;
+ }
+
+ err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
+ if (err)
+ goto out;
+
+ /* Mark the carrier down until the test is complete */
+ phy_link_down(phydev);
+
+ netif_testing_on(dev);
+ err = phydev->drv->cable_test_start(phydev);
+ if (err) {
+ netif_testing_off(dev);
+ phy_link_up(phydev);
+ goto out_free;
+ }
+
+ phydev->state = PHY_CABLETEST;
+
+ if (phy_polling_mode(phydev))
+ phy_trigger_machine(phydev);
+
+ mutex_unlock(&phydev->lock);
+
+ return 0;
+
+out_free:
+ ethnl_cable_test_free(phydev);
+out:
+ mutex_unlock(&phydev->lock);
+
+ return err;
+}
+EXPORT_SYMBOL(phy_start_cable_test);
+
+/**
+ * phy_start_cable_test_tdr - Start a raw TDR cable test
+ *
+ * @phydev: the phy_device struct
+ * @extack: extack for reporting useful error messages
+ * @config: Configuration of the test to run
+ */
+int phy_start_cable_test_tdr(struct phy_device *phydev,
+ struct netlink_ext_ack *extack,
+ const struct phy_tdr_config *config)
+{
+ struct net_device *dev = phydev->attached_dev;
+ int err = -ENOMEM;
+
+ if (!(phydev->drv &&
+ phydev->drv->cable_test_tdr_start &&
+ phydev->drv->cable_test_get_status)) {
+ NL_SET_ERR_MSG(extack,
+ "PHY driver does not support cable test TDR");
+ return -EOPNOTSUPP;
+ }
+
+ mutex_lock(&phydev->lock);
+ if (phydev->state == PHY_CABLETEST) {
+ NL_SET_ERR_MSG(extack,
+ "PHY already performing a test");
+ err = -EBUSY;
+ goto out;
+ }
+
+ if (phydev->state < PHY_UP ||
+ phydev->state > PHY_CABLETEST) {
+ NL_SET_ERR_MSG(extack,
+ "PHY not configured. Try setting interface up");
+ err = -EBUSY;
+ goto out;
+ }
+
+ err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
+ if (err)
+ goto out;
+
+ /* Mark the carrier down until the test is complete */
+ phy_link_down(phydev);
+
+ netif_testing_on(dev);
+ err = phydev->drv->cable_test_tdr_start(phydev, config);
+ if (err) {
+ netif_testing_off(dev);
+ phy_link_up(phydev);
+ goto out_free;
+ }
+
+ phydev->state = PHY_CABLETEST;
+
+ if (phy_polling_mode(phydev))
+ phy_trigger_machine(phydev);
+
+ mutex_unlock(&phydev->lock);
+
+ return 0;
+
+out_free:
+ ethnl_cable_test_free(phydev);
+out:
+ mutex_unlock(&phydev->lock);
+
+ return err;
+}
+EXPORT_SYMBOL(phy_start_cable_test_tdr);
+
+int phy_config_aneg(struct phy_device *phydev)
+{
+ if (phydev->drv->config_aneg)
+ return phydev->drv->config_aneg(phydev);
+
+ /* Clause 45 PHYs that don't implement Clause 22 registers are not
+ * allowed to call genphy_config_aneg()
+ */
+ if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
+ return genphy_c45_config_aneg(phydev);
+
+ return genphy_config_aneg(phydev);
+}
+EXPORT_SYMBOL(phy_config_aneg);
+
+/**
+ * phy_check_link_status - check link status and set state accordingly
+ * @phydev: the phy_device struct
+ *
+ * Description: Check for link and whether autoneg was triggered / is running
+ * and set state accordingly
+ */
+static int phy_check_link_status(struct phy_device *phydev)
+{
+ int err;
+
+ lockdep_assert_held(&phydev->lock);
+
+ /* Keep previous state if loopback is enabled because some PHYs
+ * report that Link is Down when loopback is enabled.
+ */
+ if (phydev->loopback_enabled)
+ return 0;
+
+ err = phy_read_status(phydev);
+ if (err)
+ return err;
+
+ if (phydev->link && phydev->state != PHY_RUNNING) {
+ phy_check_downshift(phydev);
+ phydev->state = PHY_RUNNING;
+ phy_link_up(phydev);
+ } else if (!phydev->link && phydev->state != PHY_NOLINK) {
+ phydev->state = PHY_NOLINK;
+ phy_link_down(phydev);
+ }
+
+ return 0;
+}
+
+/**
+ * _phy_start_aneg - start auto-negotiation for this PHY device
+ * @phydev: the phy_device struct
+ *
+ * Description: Sanitizes the settings (if we're not autonegotiating
+ * them), and then calls the driver's config_aneg function.
+ * If the PHYCONTROL Layer is operating, we change the state to
+ * reflect the beginning of Auto-negotiation or forcing.
+ */
+static int _phy_start_aneg(struct phy_device *phydev)
+{
+ int err;
+
+ lockdep_assert_held(&phydev->lock);
+
+ if (!phydev->drv)
+ return -EIO;
+
+ if (AUTONEG_DISABLE == phydev->autoneg)
+ phy_sanitize_settings(phydev);
+
+ err = phy_config_aneg(phydev);
+ if (err < 0)
+ return err;
+
+ if (phy_is_started(phydev))
+ err = phy_check_link_status(phydev);
+
+ return err;
+}
+
+/**
+ * phy_start_aneg - start auto-negotiation for this PHY device
+ * @phydev: the phy_device struct
+ *
+ * Description: Sanitizes the settings (if we're not autonegotiating
+ * them), and then calls the driver's config_aneg function.
+ * If the PHYCONTROL Layer is operating, we change the state to
+ * reflect the beginning of Auto-negotiation or forcing.
+ */
+int phy_start_aneg(struct phy_device *phydev)
+{
+ int err;
+
+ mutex_lock(&phydev->lock);
+ err = _phy_start_aneg(phydev);
+ mutex_unlock(&phydev->lock);
+
+ return err;
+}
+EXPORT_SYMBOL(phy_start_aneg);
+
+static int phy_poll_aneg_done(struct phy_device *phydev)
+{
+ unsigned int retries = 100;
+ int ret;
+
+ do {
+ msleep(100);
+ ret = phy_aneg_done(phydev);
+ } while (!ret && --retries);
+
+ if (!ret)
+ return -ETIMEDOUT;
+
+ return ret < 0 ? ret : 0;
+}
+
+int phy_ethtool_ksettings_set(struct phy_device *phydev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
+ u8 autoneg = cmd->base.autoneg;
+ u8 duplex = cmd->base.duplex;
+ u32 speed = cmd->base.speed;
+
+ if (cmd->base.phy_address != phydev->mdio.addr)
+ return -EINVAL;
+
+ linkmode_copy(advertising, cmd->link_modes.advertising);
+
+ /* We make sure that we don't pass unsupported values in to the PHY */
+ linkmode_and(advertising, advertising, phydev->supported);
+
+ /* Verify the settings we care about. */
+ if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
+ return -EINVAL;
+
+ if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
+ return -EINVAL;
+
+ if (autoneg == AUTONEG_DISABLE &&
+ ((speed != SPEED_1000 &&
+ speed != SPEED_100 &&
+ speed != SPEED_10) ||
+ (duplex != DUPLEX_HALF &&
+ duplex != DUPLEX_FULL)))
+ return -EINVAL;
+
+ mutex_lock(&phydev->lock);
+ phydev->autoneg = autoneg;
+
+ if (autoneg == AUTONEG_DISABLE) {
+ phydev->speed = speed;
+ phydev->duplex = duplex;
+ }
+
+ linkmode_copy(phydev->advertising, advertising);
+
+ linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
+ phydev->advertising, autoneg == AUTONEG_ENABLE);
+
+ phydev->master_slave_set = cmd->base.master_slave_cfg;
+ phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
+
+ /* Restart the PHY */
+ if (phy_is_started(phydev)) {
+ phydev->state = PHY_UP;
+ phy_trigger_machine(phydev);
+ } else {
+ _phy_start_aneg(phydev);
+ }
+
+ mutex_unlock(&phydev->lock);
+ return 0;
+}
+EXPORT_SYMBOL(phy_ethtool_ksettings_set);
+
+/**
+ * phy_speed_down - set speed to lowest speed supported by both link partners
+ * @phydev: the phy_device struct
+ * @sync: perform action synchronously
+ *
+ * Description: Typically used to save energy when waiting for a WoL packet
+ *
+ * WARNING: Setting sync to false may cause the system being unable to suspend
+ * in case the PHY generates an interrupt when finishing the autonegotiation.
+ * This interrupt may wake up the system immediately after suspend.
+ * Therefore use sync = false only if you're sure it's safe with the respective
+ * network chip.
+ */
+int phy_speed_down(struct phy_device *phydev, bool sync)
+{
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
+ int ret = 0;
+
+ mutex_lock(&phydev->lock);
+
+ if (phydev->autoneg != AUTONEG_ENABLE)
+ goto out;
+
+ linkmode_copy(adv_tmp, phydev->advertising);
+
+ ret = phy_speed_down_core(phydev);
+ if (ret)
+ goto out;
+
+ linkmode_copy(phydev->adv_old, adv_tmp);
+
+ if (linkmode_equal(phydev->advertising, adv_tmp)) {
+ ret = 0;
+ goto out;
+ }
+
+ ret = phy_config_aneg(phydev);
+ if (ret)
+ goto out;
+
+ ret = sync ? phy_poll_aneg_done(phydev) : 0;
+out:
+ mutex_unlock(&phydev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_speed_down);
+
+/**
+ * phy_speed_up - (re)set advertised speeds to all supported speeds
+ * @phydev: the phy_device struct
+ *
+ * Description: Used to revert the effect of phy_speed_down
+ */
+int phy_speed_up(struct phy_device *phydev)
+{
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
+ int ret = 0;
+
+ mutex_lock(&phydev->lock);
+
+ if (phydev->autoneg != AUTONEG_ENABLE)
+ goto out;
+
+ if (linkmode_empty(phydev->adv_old))
+ goto out;
+
+ linkmode_copy(adv_tmp, phydev->advertising);
+ linkmode_copy(phydev->advertising, phydev->adv_old);
+ linkmode_zero(phydev->adv_old);
+
+ if (linkmode_equal(phydev->advertising, adv_tmp))
+ goto out;
+
+ ret = phy_config_aneg(phydev);
+out:
+ mutex_unlock(&phydev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(phy_speed_up);
+
+/**
+ * phy_start_machine - start PHY state machine tracking
+ * @phydev: the phy_device struct
+ *
+ * Description: The PHY infrastructure can run a state machine
+ * which tracks whether the PHY is starting up, negotiating,
+ * etc. This function starts the delayed workqueue which tracks
+ * the state of the PHY. If you want to maintain your own state machine,
+ * do not call this function.
+ */
+void phy_start_machine(struct phy_device *phydev)
+{
+ phy_trigger_machine(phydev);
+}
+EXPORT_SYMBOL_GPL(phy_start_machine);
+
+/**
+ * phy_stop_machine - stop the PHY state machine tracking
+ * @phydev: target phy_device struct
+ *
+ * Description: Stops the state machine delayed workqueue, sets the
+ * state to UP (unless it wasn't up yet). This function must be
+ * called BEFORE phy_detach.
+ */
+void phy_stop_machine(struct phy_device *phydev)
+{
+ cancel_delayed_work_sync(&phydev->state_queue);
+
+ mutex_lock(&phydev->lock);
+ if (phy_is_started(phydev))
+ phydev->state = PHY_UP;
+ mutex_unlock(&phydev->lock);
+}
+
+static void phy_process_error(struct phy_device *phydev)
+{
+ /* phydev->lock must be held for the state change to be safe */
+ if (!mutex_is_locked(&phydev->lock))
+ phydev_err(phydev, "PHY-device data unsafe context\n");
+
+ phydev->state = PHY_ERROR;
+
+ phy_trigger_machine(phydev);
+}
+
+static void phy_error_precise(struct phy_device *phydev,
+ const void *func, int err)
+{
+ WARN(1, "%pS: returned: %d\n", func, err);
+ mutex_lock(&phydev->lock);
+ phy_process_error(phydev);
+ mutex_unlock(&phydev->lock);
+}
+
+/**
+ * phy_error - enter ERROR state for this PHY device
+ * @phydev: target phy_device struct
+ *
+ * Moves the PHY to the ERROR state in response to a read
+ * or write error, and tells the controller the link is down.
+ * Must be called with phydev->lock held.
+ */
+void phy_error(struct phy_device *phydev)
+{
+ WARN_ON(1);
+ phy_process_error(phydev);
+}
+EXPORT_SYMBOL(phy_error);
+
+/**
+ * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
+ * @phydev: target phy_device struct
+ */
+int phy_disable_interrupts(struct phy_device *phydev)
+{
+ /* Disable PHY interrupts */
+ return phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
+}
+
+/**
+ * phy_interrupt - PHY interrupt handler
+ * @irq: interrupt line
+ * @phy_dat: phy_device pointer
+ *
+ * Description: Handle PHY interrupt
+ */
+static irqreturn_t phy_interrupt(int irq, void *phy_dat)
+{
+ struct phy_device *phydev = phy_dat;
+ struct phy_driver *drv = phydev->drv;
+ irqreturn_t ret;
+
+ /* Wakeup interrupts may occur during a system sleep transition.
+ * Postpone handling until the PHY has resumed.
+ */
+ if (IS_ENABLED(CONFIG_PM_SLEEP) && phydev->irq_suspended) {
+ struct net_device *netdev = phydev->attached_dev;
+
+ if (netdev) {
+ struct device *parent = netdev->dev.parent;
+
+ if (netdev->wol_enabled)
+ pm_system_wakeup();
+ else if (device_may_wakeup(&netdev->dev))
+ pm_wakeup_dev_event(&netdev->dev, 0, true);
+ else if (parent && device_may_wakeup(parent))
+ pm_wakeup_dev_event(parent, 0, true);
+ }
+
+ phydev->irq_rerun = 1;
+ disable_irq_nosync(irq);
+ return IRQ_HANDLED;
+ }
+
+ mutex_lock(&phydev->lock);
+ ret = drv->handle_interrupt(phydev);
+ mutex_unlock(&phydev->lock);
+
+ return ret;
+}
+
+/**
+ * phy_enable_interrupts - Enable the interrupts from the PHY side
+ * @phydev: target phy_device struct
+ */
+static int phy_enable_interrupts(struct phy_device *phydev)
+{
+ return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
+}
+
+/**
+ * phy_request_interrupt - request and enable interrupt for a PHY device
+ * @phydev: target phy_device struct
+ *
+ * Description: Request and enable the interrupt for the given PHY.
+ * If this fails, then we set irq to PHY_POLL.
+ * This should only be called with a valid IRQ number.
+ */
+void phy_request_interrupt(struct phy_device *phydev)
+{
+ int err;
+
+ err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
+ IRQF_ONESHOT | IRQF_SHARED,
+ phydev_name(phydev), phydev);
+ if (err) {
+ phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
+ err, phydev->irq);
+ phydev->irq = PHY_POLL;
+ } else {
+ if (phy_enable_interrupts(phydev)) {
+ phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
+ phy_free_interrupt(phydev);
+ phydev->irq = PHY_POLL;
+ }
+ }
+}
+EXPORT_SYMBOL(phy_request_interrupt);
+
+/**
+ * phy_free_interrupt - disable and free interrupt for a PHY device
+ * @phydev: target phy_device struct
+ *
+ * Description: Disable and free the interrupt for the given PHY.
+ * This should only be called with a valid IRQ number.
+ */
+void phy_free_interrupt(struct phy_device *phydev)
+{
+ phy_disable_interrupts(phydev);
+ free_irq(phydev->irq, phydev);
+}
+EXPORT_SYMBOL(phy_free_interrupt);
+
+/**
+ * phy_stop - Bring down the PHY link, and stop checking the status
+ * @phydev: target phy_device struct
+ */
+void phy_stop(struct phy_device *phydev)
+{
+ struct net_device *dev = phydev->attached_dev;
+ enum phy_state old_state;
+
+ if (!phy_is_started(phydev) && phydev->state != PHY_DOWN &&
+ phydev->state != PHY_ERROR) {
+ WARN(1, "called from state %s\n",
+ phy_state_to_str(phydev->state));
+ return;
+ }
+
+ mutex_lock(&phydev->lock);
+ old_state = phydev->state;
+
+ if (phydev->state == PHY_CABLETEST) {
+ phy_abort_cable_test(phydev);
+ netif_testing_off(dev);
+ }
+
+ if (phydev->sfp_bus)
+ sfp_upstream_stop(phydev->sfp_bus);
+
+ phydev->state = PHY_HALTED;
+ phy_process_state_change(phydev, old_state);
+
+ mutex_unlock(&phydev->lock);
+
+ phy_state_machine(&phydev->state_queue.work);
+ phy_stop_machine(phydev);
+
+ /* Cannot call flush_scheduled_work() here as desired because
+ * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
+ * will not reenable interrupts.
+ */
+}
+EXPORT_SYMBOL(phy_stop);
+
+/**
+ * phy_start - start or restart a PHY device
+ * @phydev: target phy_device struct
+ *
+ * Description: Indicates the attached device's readiness to
+ * handle PHY-related work. Used during startup to start the
+ * PHY, and after a call to phy_stop() to resume operation.
+ * Also used to indicate the MDIO bus has cleared an error
+ * condition.
+ */
+void phy_start(struct phy_device *phydev)
+{
+ mutex_lock(&phydev->lock);
+
+ if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
+ WARN(1, "called from state %s\n",
+ phy_state_to_str(phydev->state));
+ goto out;
+ }
+
+ if (phydev->sfp_bus)
+ sfp_upstream_start(phydev->sfp_bus);
+
+ /* if phy was suspended, bring the physical link up again */
+ __phy_resume(phydev);
+
+ phydev->state = PHY_UP;
+
+ phy_start_machine(phydev);
+out:
+ mutex_unlock(&phydev->lock);
+}
+EXPORT_SYMBOL(phy_start);
+
+/**
+ * phy_state_machine - Handle the state machine
+ * @work: work_struct that describes the work to be done
+ */
+void phy_state_machine(struct work_struct *work)
+{
+ struct delayed_work *dwork = to_delayed_work(work);
+ struct phy_device *phydev =
+ container_of(dwork, struct phy_device, state_queue);
+ struct net_device *dev = phydev->attached_dev;
+ bool needs_aneg = false, do_suspend = false;
+ enum phy_state old_state;
+ const void *func = NULL;
+ bool finished = false;
+ int err = 0;
+
+ mutex_lock(&phydev->lock);
+
+ old_state = phydev->state;
+
+ switch (phydev->state) {
+ case PHY_DOWN:
+ case PHY_READY:
+ break;
+ case PHY_UP:
+ needs_aneg = true;
+
+ break;
+ case PHY_NOLINK:
+ case PHY_RUNNING:
+ err = phy_check_link_status(phydev);
+ func = &phy_check_link_status;
+ break;
+ case PHY_CABLETEST:
+ err = phydev->drv->cable_test_get_status(phydev, &finished);
+ if (err) {
+ phy_abort_cable_test(phydev);
+ netif_testing_off(dev);
+ needs_aneg = true;
+ phydev->state = PHY_UP;
+ break;
+ }
+
+ if (finished) {
+ ethnl_cable_test_finished(phydev);
+ netif_testing_off(dev);
+ needs_aneg = true;
+ phydev->state = PHY_UP;
+ }
+ break;
+ case PHY_HALTED:
+ case PHY_ERROR:
+ if (phydev->link) {
+ phydev->link = 0;
+ phy_link_down(phydev);
+ }
+ do_suspend = true;
+ break;
+ }
+
+ mutex_unlock(&phydev->lock);
+
+ if (needs_aneg) {
+ err = phy_start_aneg(phydev);
+ func = &phy_start_aneg;
+ } else if (do_suspend) {
+ phy_suspend(phydev);
+ }
+
+ if (err == -ENODEV)
+ return;
+
+ if (err < 0)
+ phy_error_precise(phydev, func, err);
+
+ phy_process_state_change(phydev, old_state);
+
+ /* Only re-schedule a PHY state machine change if we are polling the
+ * PHY, if PHY_MAC_INTERRUPT is set, then we will be moving
+ * between states from phy_mac_interrupt().
+ *
+ * In state PHY_HALTED the PHY gets suspended, so rescheduling the
+ * state machine would be pointless and possibly error prone when
+ * called from phy_disconnect() synchronously.
+ */
+ mutex_lock(&phydev->lock);
+ if (phy_polling_mode(phydev) && phy_is_started(phydev))
+ phy_queue_state_machine(phydev, PHY_STATE_TIME);
+ mutex_unlock(&phydev->lock);
+}
+
+/**
+ * phy_mac_interrupt - MAC says the link has changed
+ * @phydev: phy_device struct with changed link
+ *
+ * The MAC layer is able to indicate there has been a change in the PHY link
+ * status. Trigger the state machine and work a work queue.
+ */
+void phy_mac_interrupt(struct phy_device *phydev)
+{
+ /* Trigger a state machine change */
+ phy_trigger_machine(phydev);
+}
+EXPORT_SYMBOL(phy_mac_interrupt);
+
+/**
+ * phy_init_eee - init and check the EEE feature
+ * @phydev: target phy_device struct
+ * @clk_stop_enable: PHY may stop the clock during LPI
+ *
+ * Description: it checks if the Energy-Efficient Ethernet (EEE)
+ * is supported by looking at the MMD registers 3.20 and 7.60/61
+ * and it programs the MMD register 3.0 setting the "Clock stop enable"
+ * bit if required.
+ */
+int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
+{
+ int ret;
+
+ if (!phydev->drv)
+ return -EIO;
+
+ ret = genphy_c45_eee_is_active(phydev, NULL, NULL, NULL);
+ if (ret < 0)
+ return ret;
+ if (!ret)
+ return -EPROTONOSUPPORT;
+
+ if (clk_stop_enable)
+ /* Configure the PHY to stop receiving xMII
+ * clock while it is signaling LPI.
+ */
+ ret = phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
+ MDIO_PCS_CTRL1_CLKSTOP_EN);
+
+ return ret < 0 ? ret : 0;
+}
+EXPORT_SYMBOL(phy_init_eee);
+
+/**
+ * phy_get_eee_err - report the EEE wake error count
+ * @phydev: target phy_device struct
+ *
+ * Description: it is to report the number of time where the PHY
+ * failed to complete its normal wake sequence.
+ */
+int phy_get_eee_err(struct phy_device *phydev)
+{
+ int ret;
+
+ if (!phydev->drv)
+ return -EIO;
+
+ mutex_lock(&phydev->lock);
+ ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
+ mutex_unlock(&phydev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(phy_get_eee_err);
+
+/**
+ * phy_ethtool_get_eee - get EEE supported and status
+ * @phydev: target phy_device struct
+ * @data: ethtool_eee data
+ *
+ * Description: it reportes the Supported/Advertisement/LP Advertisement
+ * capabilities.
+ */
+int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
+{
+ int ret;
+
+ if (!phydev->drv)
+ return -EIO;
+
+ mutex_lock(&phydev->lock);
+ ret = genphy_c45_ethtool_get_eee(phydev, data);
+ mutex_unlock(&phydev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(phy_ethtool_get_eee);
+
+/**
+ * phy_ethtool_set_eee - set EEE supported and status
+ * @phydev: target phy_device struct
+ * @data: ethtool_eee data
+ *
+ * Description: it is to program the Advertisement EEE register.
+ */
+int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
+{
+ int ret;
+
+ if (!phydev->drv)
+ return -EIO;
+
+ mutex_lock(&phydev->lock);
+ ret = genphy_c45_ethtool_set_eee(phydev, data);
+ mutex_unlock(&phydev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(phy_ethtool_set_eee);
+
+/**
+ * phy_ethtool_set_wol - Configure Wake On LAN
+ *
+ * @phydev: target phy_device struct
+ * @wol: Configuration requested
+ */
+int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
+{
+ int ret;
+
+ if (phydev->drv && phydev->drv->set_wol) {
+ mutex_lock(&phydev->lock);
+ ret = phydev->drv->set_wol(phydev, wol);
+ mutex_unlock(&phydev->lock);
+
+ return ret;
+ }
+
+ return -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(phy_ethtool_set_wol);
+
+/**
+ * phy_ethtool_get_wol - Get the current Wake On LAN configuration
+ *
+ * @phydev: target phy_device struct
+ * @wol: Store the current configuration here
+ */
+void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
+{
+ if (phydev->drv && phydev->drv->get_wol) {
+ mutex_lock(&phydev->lock);
+ phydev->drv->get_wol(phydev, wol);
+ mutex_unlock(&phydev->lock);
+ }
+}
+EXPORT_SYMBOL(phy_ethtool_get_wol);
+
+int phy_ethtool_get_link_ksettings(struct net_device *ndev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct phy_device *phydev = ndev->phydev;
+
+ if (!phydev)
+ return -ENODEV;
+
+ phy_ethtool_ksettings_get(phydev, cmd);
+
+ return 0;
+}
+EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
+
+int phy_ethtool_set_link_ksettings(struct net_device *ndev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ struct phy_device *phydev = ndev->phydev;
+
+ if (!phydev)
+ return -ENODEV;
+
+ return phy_ethtool_ksettings_set(phydev, cmd);
+}
+EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
+
+/**
+ * phy_ethtool_nway_reset - Restart auto negotiation
+ * @ndev: Network device to restart autoneg for
+ */
+int phy_ethtool_nway_reset(struct net_device *ndev)
+{
+ struct phy_device *phydev = ndev->phydev;
+ int ret;
+
+ if (!phydev)
+ return -ENODEV;
+
+ if (!phydev->drv)
+ return -EIO;
+
+ mutex_lock(&phydev->lock);
+ ret = phy_restart_aneg(phydev);
+ mutex_unlock(&phydev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(phy_ethtool_nway_reset);