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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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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>
#include "phylib-internal.h"#include "phy-caps.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_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_caps_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_caps_valid(speed, duplex, features);}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 link_capabilities *c;
c = phy_caps_lookup(phydev->speed, phydev->duplex, phydev->supported, false);
if (c) { phydev->speed = c->speed; phydev->duplex = c->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 = phydev->is_internal ? 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); struct kernel_hwtstamp_config kernel_cfg; struct netlink_ext_ack extack = {}; u16 val = mii_data->val_in; bool change_autoneg = false; struct hwtstamp_config cfg; int prtad, devad; int ret;
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); ret = mdiobus_c45_read(phydev->mdio.bus, prtad, devad, mii_data->reg_num);
} else { ret = mdiobus_read(phydev->mdio.bus, mii_data->phy_id, mii_data->reg_num); }
if (ret < 0) return ret;
mii_data->val_out = ret;
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_set) { if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) return -EFAULT;
hwtstamp_config_to_kernel(&kernel_cfg, &cfg); ret = phydev->mii_ts->hwtstamp_set(phydev->mii_ts, &kernel_cfg, &extack); if (ret) return ret;
hwtstamp_config_from_kernel(&cfg, &kernel_cfg); if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) return -EFAULT;
return 0; } 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;
if (phydev->mii_ts && phydev->mii_ts->hwtstamp_get) return phydev->mii_ts->hwtstamp_get(phydev->mii_ts, config);
return -EOPNOTSUPP;}
/** * __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;
if (phydev->mii_ts && phydev->mii_ts->hwtstamp_set) return phydev->mii_ts->hwtstamp_set(phydev->mii_ts, config, extack);
return -EOPNOTSUPP;}
/** * phy_queue_state_machine - Trigger the state machine to run soon * * @phydev: the phy_device struct * @jiffies: Run the state machine after these jiffies */static void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies){ mod_delayed_work(system_power_efficient_wq, &phydev->state_queue, jiffies);}
/** * 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_phy_stats - Retrieve standardized PHY statistics * @phydev: Pointer to the PHY device * @phy_stats: Pointer to ethtool_eth_phy_stats structure * @phydev_stats: Pointer to ethtool_phy_stats structure * * Fetches PHY statistics using a kernel-defined interface for consistent * diagnostics. Unlike phy_ethtool_get_stats(), which allows custom stats, * this function enforces a standardized format for better interoperability. */void __phy_ethtool_get_phy_stats(struct phy_device *phydev, struct ethtool_eth_phy_stats *phy_stats, struct ethtool_phy_stats *phydev_stats){ if (!phydev->drv || !phydev->drv->get_phy_stats) return;
mutex_lock(&phydev->lock); phydev->drv->get_phy_stats(phydev, phy_stats, phydev_stats); mutex_unlock(&phydev->lock);}
/** * __phy_ethtool_get_link_ext_stats - Retrieve extended link statistics for a PHY * @phydev: Pointer to the PHY device * @link_stats: Pointer to the structure to store extended link statistics * * Populates the ethtool_link_ext_stats structure with link down event counts * and additional driver-specific link statistics, if available. */void __phy_ethtool_get_link_ext_stats(struct phy_device *phydev, struct ethtool_link_ext_stats *link_stats){ link_stats->link_down_events = READ_ONCE(phydev->link_down_events);
if (!phydev->drv || !phydev->drv->get_link_stats) return;
mutex_lock(&phydev->lock); phydev->drv->get_link_stats(phydev, link_stats); mutex_unlock(&phydev->lock);}
/** * 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_obj(*curr_plca_cfg); 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; err = genphy_c45_eee_is_active(phydev, NULL); phydev->eee_active = err > 0; phydev->enable_tx_lpi = phydev->eee_cfg.tx_lpi_enabled && phydev->eee_active;
phy_link_up(phydev); } else if (!phydev->link && phydev->state != PHY_NOLINK) { phydev->state = PHY_NOLINK; phydev->eee_active = false; phydev->enable_tx_lpi = false; phy_link_down(phydev); }
return 0;}
/** * phy_inband_caps - query which in-band signalling modes are supported * @phydev: a pointer to a &struct phy_device * @interface: the interface mode for the PHY * * Returns zero if it is unknown what in-band signalling is supported by the * PHY (e.g. because the PHY driver doesn't implement the method.) Otherwise, * returns a bit mask of the LINK_INBAND_* values from * &enum link_inband_signalling to describe which inband modes are supported * by the PHY for this interface mode. */unsigned int phy_inband_caps(struct phy_device *phydev, phy_interface_t interface){ if (phydev->drv && phydev->drv->inband_caps) return phydev->drv->inband_caps(phydev, interface);
return 0;}EXPORT_SYMBOL_GPL(phy_inband_caps);
/** * phy_config_inband - configure the desired PHY in-band mode * @phydev: the phy_device struct * @modes: in-band modes to configure * * Description: disables, enables or enables-with-bypass in-band signalling * between the PHY and host system. * * Returns: zero on success, or negative errno value. */int phy_config_inband(struct phy_device *phydev, unsigned int modes){ lockdep_assert_held(&phydev->lock);
if (!!(modes & LINK_INBAND_DISABLE) + !!(modes & LINK_INBAND_ENABLE) + !!(modes & LINK_INBAND_BYPASS) != 1) return -EINVAL;
if (!phydev->drv) return -EIO; else if (!phydev->drv->config_inband) return -EOPNOTSUPP;
return phydev->drv->config_inband(phydev, modes);}EXPORT_SYMBOL(phy_config_inband);
/** * _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;
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;}EXPORT_SYMBOL(_phy_start_aneg);
/** * 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) || !linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported))) 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); phy_process_error(phydev);}
/** * 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_write_barrier - ensure the last write completed for this PHY device * @phydev: target phy_device struct * * MDIO bus controllers are not required to wait for write transactions to * complete before returning. Calling this function ensures that the previous * write has completed. */static void phy_write_barrier(struct phy_device *phydev){ if (mdiobus_read(phydev->mdio.bus, phydev->mdio.addr, MII_PHYSID1) == -EOPNOTSUPP) mdiobus_c45_read(phydev->mdio.bus, phydev->mdio.addr, MDIO_MMD_PMAPMD, MII_PHYSID1);}
/** * phy_disable_interrupts - Disable the PHY interrupts from the PHY side * @phydev: target phy_device struct */int phy_disable_interrupts(struct phy_device *phydev){ int err;
/* Disable PHY interrupts */ err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); if (err) return err;
phy_write_barrier(phydev); return 0;}
/** * 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; 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->ethtool->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 = phydev->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_update_stats - Update PHY device statistics if supported. * @phydev: Pointer to the PHY device structure. * * If the PHY driver provides an update_stats callback, this function * invokes it to update the PHY statistics. If not, it returns 0. * * Return: 0 on success, or a negative error code if the callback fails. */static int phy_update_stats(struct phy_device *phydev){ if (!phydev->drv->update_stats) return 0;
return phydev->drv->update_stats(phydev);}
/** * 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_get_next_update_time - Determine the next PHY update time * @phydev: Pointer to the phy_device structure * * This function queries the PHY driver to get the time for the next polling * event. If the driver does not implement the callback, a default value is * used. * * Return: The time for the next polling event in jiffies */static unsigned int phy_get_next_update_time(struct phy_device *phydev){ if (phydev->drv && phydev->drv->get_next_update_time) return phydev->drv->get_next_update_time(phydev);
return PHY_STATE_TIME;}
enum phy_state_work { PHY_STATE_WORK_NONE, PHY_STATE_WORK_ANEG, PHY_STATE_WORK_SUSPEND,};
static enum phy_state_work _phy_state_machine(struct phy_device *phydev){ enum phy_state_work state_work = PHY_STATE_WORK_NONE; struct net_device *dev = phydev->attached_dev; enum phy_state old_state = phydev->state; const void *func = NULL; bool finished = false; int err = 0;
switch (phydev->state) { case PHY_DOWN: case PHY_READY: break; case PHY_UP: state_work = PHY_STATE_WORK_ANEG; break; case PHY_NOLINK: case PHY_RUNNING: err = phy_check_link_status(phydev); func = &phy_check_link_status;
if (!err) err = phy_update_stats(phydev); break; case PHY_CABLETEST: err = phydev->drv->cable_test_get_status(phydev, &finished); if (err) { phy_abort_cable_test(phydev); netif_testing_off(dev); state_work = PHY_STATE_WORK_ANEG; phydev->state = PHY_UP; break; }
if (finished) { ethnl_cable_test_finished(phydev); netif_testing_off(dev); state_work = PHY_STATE_WORK_ANEG; phydev->state = PHY_UP; } break; case PHY_HALTED: if (phydev->link) { if (phydev->autoneg == AUTONEG_ENABLE) { phydev->speed = SPEED_UNKNOWN; phydev->duplex = DUPLEX_UNKNOWN; } if (phydev->master_slave_state != MASTER_SLAVE_STATE_UNSUPPORTED) phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN; phydev->mdix = ETH_TP_MDI_INVALID; linkmode_zero(phydev->lp_advertising); } fallthrough; case PHY_ERROR: if (phydev->link) { phydev->link = 0; phydev->eee_active = false; phydev->enable_tx_lpi = false; phy_link_down(phydev); } state_work = PHY_STATE_WORK_SUSPEND; break; }
if (state_work == PHY_STATE_WORK_ANEG) { err = _phy_start_aneg(phydev); func = &_phy_start_aneg; }
if (err == -ENODEV) return state_work;
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. */ if (phy_polling_mode(phydev) && phy_is_started(phydev)) phy_queue_state_machine(phydev, phy_get_next_update_time(phydev));
return state_work;}
/* unlocked part of the PHY state machine */static void _phy_state_machine_post_work(struct phy_device *phydev, enum phy_state_work state_work){ if (state_work == PHY_STATE_WORK_SUSPEND) phy_suspend(phydev);}
/** * 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); enum phy_state_work state_work;
mutex_lock(&phydev->lock); state_work = _phy_state_machine(phydev); mutex_unlock(&phydev->lock);
_phy_state_machine_post_work(phydev, state_work);}
/** * 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_work state_work; 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);
state_work = _phy_state_machine(phydev); mutex_unlock(&phydev->lock);
_phy_state_machine_post_work(phydev, state_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_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_loopback - Configure loopback mode of PHY * @phydev: target phy_device struct * @enable: enable or disable loopback mode * @speed: enable loopback mode with speed * * Configure loopback mode of PHY and signal link down and link up if speed is * changing. * * Return: 0 on success, negative error code on failure. */int phy_loopback(struct phy_device *phydev, bool enable, int speed){ bool link_up = false; int ret = 0;
if (!phydev->drv) return -EIO;
mutex_lock(&phydev->lock);
if (enable && phydev->loopback_enabled) { ret = -EBUSY; goto out; }
if (!enable && !phydev->loopback_enabled) { ret = -EINVAL; goto out; }
if (enable) { /* * Link up is signaled with a defined speed. If speed changes, * then first link down and after that link up needs to be * signaled. */ if (phydev->link && phydev->state == PHY_RUNNING) { /* link is up and signaled */ if (speed && phydev->speed != speed) { /* signal link down and up for new speed */ phydev->link = false; phydev->state = PHY_NOLINK; phy_link_down(phydev);
link_up = true; } } else { /* link is not signaled */ if (speed) { /* signal link up for new speed */ link_up = true; } } }
if (phydev->drv->set_loopback) ret = phydev->drv->set_loopback(phydev, enable, speed); else ret = genphy_loopback(phydev, enable, speed);
if (ret) { if (enable) { /* try to restore link if enabling loopback fails */ if (phydev->drv->set_loopback) phydev->drv->set_loopback(phydev, false, 0); else genphy_loopback(phydev, false, 0); }
goto out; }
if (link_up) { phydev->link = true; phydev->state = PHY_RUNNING; phy_link_up(phydev); }
phydev->loopback_enabled = enable;
out: mutex_unlock(&phydev->lock); return ret;}EXPORT_SYMBOL(phy_loopback);
/** * phy_eee_tx_clock_stop_capable() - indicate whether the MAC can stop tx clock * @phydev: target phy_device struct * * Indicate whether the MAC can disable the transmit xMII clock while in LPI * state. Returns 1 if the MAC may stop the transmit clock, 0 if the MAC must * not stop the transmit clock, or negative error. */int phy_eee_tx_clock_stop_capable(struct phy_device *phydev){ int stat1;
stat1 = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_STAT1); if (stat1 < 0) return stat1;
return !!(stat1 & MDIO_PCS_STAT1_CLKSTOP_CAP);}EXPORT_SYMBOL_GPL(phy_eee_tx_clock_stop_capable);
/** * phy_eee_rx_clock_stop() - configure PHY receive clock in LPI * @phydev: target phy_device struct * @clk_stop_enable: flag to indicate whether the clock can be stopped * * Configure whether the PHY can disable its receive clock during LPI mode, * See IEEE 802.3 sections 22.2.2.2, 35.2.2.10, and 45.2.3.1.4. * * Returns: 0 or negative error. */int phy_eee_rx_clock_stop(struct phy_device *phydev, bool clk_stop_enable){ /* Configure the PHY to stop receiving xMII * clock while it is signaling LPI. */ return phy_modify_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, MDIO_PCS_CTRL1_CLKSTOP_EN, clk_stop_enable ? MDIO_PCS_CTRL1_CLKSTOP_EN : 0);}EXPORT_SYMBOL_GPL(phy_eee_rx_clock_stop);
/** * 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); if (ret < 0) return ret; if (!ret) return -EPROTONOSUPPORT;
if (clk_stop_enable) ret = phy_eee_rx_clock_stop(phydev, true);
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_keee data * * Description: get the current EEE settings, filling in all members of * @data. */int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_keee *data){ int ret;
if (!phydev->drv) return -EIO;
mutex_lock(&phydev->lock); ret = genphy_c45_ethtool_get_eee(phydev, data); eeecfg_to_eee(data, &phydev->eee_cfg); mutex_unlock(&phydev->lock);
return ret;}EXPORT_SYMBOL(phy_ethtool_get_eee);
/** * phy_ethtool_set_eee_noneg - Adjusts MAC LPI configuration without PHY * renegotiation * @phydev: pointer to the target PHY device structure * @old_cfg: pointer to the eee_config structure containing the old EEE settings * * This function updates the Energy Efficient Ethernet (EEE) configuration * for cases where only the MAC's Low Power Idle (LPI) configuration changes, * without triggering PHY renegotiation. It ensures that the MAC is properly * informed of the new LPI settings by cycling the link down and up, which * is necessary for the MAC to adopt the new configuration. This adjustment * is done only if there is a change in the tx_lpi_enabled or tx_lpi_timer * configuration. */static void phy_ethtool_set_eee_noneg(struct phy_device *phydev, const struct eee_config *old_cfg){ bool enable_tx_lpi;
if (!phydev->link) return;
enable_tx_lpi = phydev->eee_cfg.tx_lpi_enabled && phydev->eee_active;
if (phydev->enable_tx_lpi != enable_tx_lpi || phydev->eee_cfg.tx_lpi_timer != old_cfg->tx_lpi_timer) { phydev->enable_tx_lpi = false; phydev->link = false; phy_link_down(phydev); phydev->enable_tx_lpi = enable_tx_lpi; phydev->link = true; phy_link_up(phydev); }}
/** * phy_ethtool_set_eee - set EEE supported and status * @phydev: target phy_device struct * @data: ethtool_keee data * * Description: it is to program the Advertisement EEE register. */int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_keee *data){ struct eee_config old_cfg; int ret;
if (!phydev->drv) return -EIO;
mutex_lock(&phydev->lock);
old_cfg = phydev->eee_cfg; eee_to_eeecfg(&phydev->eee_cfg, data);
ret = genphy_c45_ethtool_set_eee(phydev, data); if (ret == 0) phy_ethtool_set_eee_noneg(phydev, &old_cfg); else if (ret < 0) phydev->eee_cfg = old_cfg;
mutex_unlock(&phydev->lock);
return ret < 0 ? ret : 0;}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);