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linuxdebug/drivers/net/phy/phylink.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
/*
* phylink models the MAC to optional PHY connection, supporting
* technologies such as SFP cages where the PHY is hot-pluggable.
*
* Copyright (C) 2015 Russell King
*/
#include <linux/acpi.h>
#include <linux/ethtool.h>
#include <linux/export.h>
#include <linux/gpio/consumer.h>
#include <linux/netdevice.h>
#include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/phylink.h>
#include <linux/rtnetlink.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
#include "sfp.h"
#include "swphy.h"
#define SUPPORTED_INTERFACES \
(SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \
SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane)
#define ADVERTISED_INTERFACES \
(ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \
ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane)
enum {
PHYLINK_DISABLE_STOPPED,
PHYLINK_DISABLE_LINK,
PHYLINK_DISABLE_MAC_WOL,
};
/**
* struct phylink - internal data type for phylink
*/
struct phylink {
/* private: */
struct net_device *netdev;
const struct phylink_mac_ops *mac_ops;
struct phylink_config *config;
struct phylink_pcs *pcs;
struct device *dev;
unsigned int old_link_state:1;
unsigned long phylink_disable_state; /* bitmask of disables */
struct phy_device *phydev;
phy_interface_t link_interface; /* PHY_INTERFACE_xxx */
u8 cfg_link_an_mode; /* MLO_AN_xxx */
u8 cur_link_an_mode;
u8 link_port; /* The current non-phy ethtool port */
__ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
/* The link configuration settings */
struct phylink_link_state link_config;
/* The current settings */
phy_interface_t cur_interface;
struct gpio_desc *link_gpio;
unsigned int link_irq;
struct timer_list link_poll;
void (*get_fixed_state)(struct net_device *dev,
struct phylink_link_state *s);
struct mutex state_mutex;
struct phylink_link_state phy_state;
struct work_struct resolve;
bool mac_link_dropped;
bool using_mac_select_pcs;
struct sfp_bus *sfp_bus;
bool sfp_may_have_phy;
DECLARE_PHY_INTERFACE_MASK(sfp_interfaces);
__ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support);
u8 sfp_port;
};
#define phylink_printk(level, pl, fmt, ...) \
do { \
if ((pl)->config->type == PHYLINK_NETDEV) \
netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \
else if ((pl)->config->type == PHYLINK_DEV) \
dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \
} while (0)
#define phylink_err(pl, fmt, ...) \
phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__)
#define phylink_warn(pl, fmt, ...) \
phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__)
#define phylink_info(pl, fmt, ...) \
phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__)
#if defined(CONFIG_DYNAMIC_DEBUG)
#define phylink_dbg(pl, fmt, ...) \
do { \
if ((pl)->config->type == PHYLINK_NETDEV) \
netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \
else if ((pl)->config->type == PHYLINK_DEV) \
dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \
} while (0)
#elif defined(DEBUG)
#define phylink_dbg(pl, fmt, ...) \
phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__)
#else
#define phylink_dbg(pl, fmt, ...) \
({ \
if (0) \
phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \
})
#endif
/**
* phylink_set_port_modes() - set the port type modes in the ethtool mask
* @mask: ethtool link mode mask
*
* Sets all the port type modes in the ethtool mask. MAC drivers should
* use this in their 'validate' callback.
*/
void phylink_set_port_modes(unsigned long *mask)
{
phylink_set(mask, TP);
phylink_set(mask, AUI);
phylink_set(mask, MII);
phylink_set(mask, FIBRE);
phylink_set(mask, BNC);
phylink_set(mask, Backplane);
}
EXPORT_SYMBOL_GPL(phylink_set_port_modes);
static int phylink_is_empty_linkmode(const unsigned long *linkmode)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, };
phylink_set_port_modes(tmp);
phylink_set(tmp, Autoneg);
phylink_set(tmp, Pause);
phylink_set(tmp, Asym_Pause);
return linkmode_subset(linkmode, tmp);
}
static const char *phylink_an_mode_str(unsigned int mode)
{
static const char *modestr[] = {
[MLO_AN_PHY] = "phy",
[MLO_AN_FIXED] = "fixed",
[MLO_AN_INBAND] = "inband",
};
return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
}
/**
* phylink_interface_max_speed() - get the maximum speed of a phy interface
* @interface: phy interface mode defined by &typedef phy_interface_t
*
* Determine the maximum speed of a phy interface. This is intended to help
* determine the correct speed to pass to the MAC when the phy is performing
* rate matching.
*
* Return: The maximum speed of @interface
*/
static int phylink_interface_max_speed(phy_interface_t interface)
{
switch (interface) {
case PHY_INTERFACE_MODE_100BASEX:
case PHY_INTERFACE_MODE_REVRMII:
case PHY_INTERFACE_MODE_RMII:
case PHY_INTERFACE_MODE_SMII:
case PHY_INTERFACE_MODE_REVMII:
case PHY_INTERFACE_MODE_MII:
return SPEED_100;
case PHY_INTERFACE_MODE_TBI:
case PHY_INTERFACE_MODE_MOCA:
case PHY_INTERFACE_MODE_RTBI:
case PHY_INTERFACE_MODE_1000BASEX:
case PHY_INTERFACE_MODE_1000BASEKX:
case PHY_INTERFACE_MODE_TRGMII:
case PHY_INTERFACE_MODE_RGMII_TXID:
case PHY_INTERFACE_MODE_RGMII_RXID:
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_QSGMII:
case PHY_INTERFACE_MODE_QUSGMII:
case PHY_INTERFACE_MODE_SGMII:
case PHY_INTERFACE_MODE_GMII:
return SPEED_1000;
case PHY_INTERFACE_MODE_2500BASEX:
return SPEED_2500;
case PHY_INTERFACE_MODE_5GBASER:
return SPEED_5000;
case PHY_INTERFACE_MODE_XGMII:
case PHY_INTERFACE_MODE_RXAUI:
case PHY_INTERFACE_MODE_XAUI:
case PHY_INTERFACE_MODE_10GBASER:
case PHY_INTERFACE_MODE_10GKR:
case PHY_INTERFACE_MODE_USXGMII:
return SPEED_10000;
case PHY_INTERFACE_MODE_25GBASER:
return SPEED_25000;
case PHY_INTERFACE_MODE_XLGMII:
return SPEED_40000;
case PHY_INTERFACE_MODE_INTERNAL:
case PHY_INTERFACE_MODE_NA:
case PHY_INTERFACE_MODE_MAX:
/* No idea! Garbage in, unknown out */
return SPEED_UNKNOWN;
}
/* If we get here, someone forgot to add an interface mode above */
WARN_ON_ONCE(1);
return SPEED_UNKNOWN;
}
/**
* phylink_caps_to_linkmodes() - Convert capabilities to ethtool link modes
* @linkmodes: ethtool linkmode mask (must be already initialised)
* @caps: bitmask of MAC capabilities
*
* Set all possible pause, speed and duplex linkmodes in @linkmodes that are
* supported by the @caps. @linkmodes must have been initialised previously.
*/
void phylink_caps_to_linkmodes(unsigned long *linkmodes, unsigned long caps)
{
if (caps & MAC_SYM_PAUSE)
__set_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes);
if (caps & MAC_ASYM_PAUSE)
__set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes);
if (caps & MAC_10HD)
__set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, linkmodes);
if (caps & MAC_10FD) {
__set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, linkmodes);
}
if (caps & MAC_100HD) {
__set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT, linkmodes);
}
if (caps & MAC_100FD) {
__set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100baseT1_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT, linkmodes);
}
if (caps & MAC_1000HD)
__set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, linkmodes);
if (caps & MAC_1000FD) {
__set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT, linkmodes);
}
if (caps & MAC_2500FD) {
__set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, linkmodes);
}
if (caps & MAC_5000FD)
__set_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, linkmodes);
if (caps & MAC_10000FD) {
__set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_10000baseCR_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, linkmodes);
}
if (caps & MAC_25000FD) {
__set_bit(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT, linkmodes);
}
if (caps & MAC_40000FD) {
__set_bit(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT, linkmodes);
}
if (caps & MAC_50000FD) {
__set_bit(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_50000baseKR_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_50000baseSR_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_50000baseCR_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT,
linkmodes);
__set_bit(ETHTOOL_LINK_MODE_50000baseDR_Full_BIT, linkmodes);
}
if (caps & MAC_56000FD) {
__set_bit(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT, linkmodes);
}
if (caps & MAC_100000FD) {
__set_bit(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT,
linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT,
linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseKR_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseSR_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseLR_ER_FR_Full_BIT,
linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseCR_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_100000baseDR_Full_BIT, linkmodes);
}
if (caps & MAC_200000FD) {
__set_bit(ETHTOOL_LINK_MODE_200000baseKR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_200000baseSR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_200000baseLR4_ER4_FR4_Full_BIT,
linkmodes);
__set_bit(ETHTOOL_LINK_MODE_200000baseDR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_200000baseCR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_200000baseKR2_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_200000baseSR2_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_200000baseLR2_ER2_FR2_Full_BIT,
linkmodes);
__set_bit(ETHTOOL_LINK_MODE_200000baseDR2_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_200000baseCR2_Full_BIT, linkmodes);
}
if (caps & MAC_400000FD) {
__set_bit(ETHTOOL_LINK_MODE_400000baseKR8_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_400000baseSR8_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_400000baseLR8_ER8_FR8_Full_BIT,
linkmodes);
__set_bit(ETHTOOL_LINK_MODE_400000baseDR8_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_400000baseCR8_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_400000baseKR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_400000baseSR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_400000baseLR4_ER4_FR4_Full_BIT,
linkmodes);
__set_bit(ETHTOOL_LINK_MODE_400000baseDR4_Full_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_400000baseCR4_Full_BIT, linkmodes);
}
}
EXPORT_SYMBOL_GPL(phylink_caps_to_linkmodes);
static struct {
unsigned long mask;
int speed;
unsigned int duplex;
} phylink_caps_params[] = {
{ MAC_400000FD, SPEED_400000, DUPLEX_FULL },
{ MAC_200000FD, SPEED_200000, DUPLEX_FULL },
{ MAC_100000FD, SPEED_100000, DUPLEX_FULL },
{ MAC_56000FD, SPEED_56000, DUPLEX_FULL },
{ MAC_50000FD, SPEED_50000, DUPLEX_FULL },
{ MAC_40000FD, SPEED_40000, DUPLEX_FULL },
{ MAC_25000FD, SPEED_25000, DUPLEX_FULL },
{ MAC_20000FD, SPEED_20000, DUPLEX_FULL },
{ MAC_10000FD, SPEED_10000, DUPLEX_FULL },
{ MAC_5000FD, SPEED_5000, DUPLEX_FULL },
{ MAC_2500FD, SPEED_2500, DUPLEX_FULL },
{ MAC_1000FD, SPEED_1000, DUPLEX_FULL },
{ MAC_1000HD, SPEED_1000, DUPLEX_HALF },
{ MAC_100FD, SPEED_100, DUPLEX_FULL },
{ MAC_100HD, SPEED_100, DUPLEX_HALF },
{ MAC_10FD, SPEED_10, DUPLEX_FULL },
{ MAC_10HD, SPEED_10, DUPLEX_HALF },
};
/**
* phylink_cap_from_speed_duplex - Get mac capability from speed/duplex
* @speed: the speed to search for
* @duplex: the duplex to search for
*
* Find the mac capability for a given speed and duplex.
*
* Return: A mask with the mac capability patching @speed and @duplex, or 0 if
* there were no matches.
*/
static unsigned long phylink_cap_from_speed_duplex(int speed,
unsigned int duplex)
{
int i;
for (i = 0; i < ARRAY_SIZE(phylink_caps_params); i++) {
if (speed == phylink_caps_params[i].speed &&
duplex == phylink_caps_params[i].duplex)
return phylink_caps_params[i].mask;
}
return 0;
}
/**
* phylink_get_capabilities() - get capabilities for a given MAC
* @interface: phy interface mode defined by &typedef phy_interface_t
* @mac_capabilities: bitmask of MAC capabilities
* @rate_matching: type of rate matching being performed
*
* Get the MAC capabilities that are supported by the @interface mode and
* @mac_capabilities.
*/
unsigned long phylink_get_capabilities(phy_interface_t interface,
unsigned long mac_capabilities,
int rate_matching)
{
int max_speed = phylink_interface_max_speed(interface);
unsigned long caps = MAC_SYM_PAUSE | MAC_ASYM_PAUSE;
unsigned long matched_caps = 0;
switch (interface) {
case PHY_INTERFACE_MODE_USXGMII:
caps |= MAC_10000FD | MAC_5000FD | MAC_2500FD;
fallthrough;
case PHY_INTERFACE_MODE_RGMII_TXID:
case PHY_INTERFACE_MODE_RGMII_RXID:
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_QSGMII:
case PHY_INTERFACE_MODE_QUSGMII:
case PHY_INTERFACE_MODE_SGMII:
case PHY_INTERFACE_MODE_GMII:
caps |= MAC_1000HD | MAC_1000FD;
fallthrough;
case PHY_INTERFACE_MODE_REVRMII:
case PHY_INTERFACE_MODE_RMII:
case PHY_INTERFACE_MODE_SMII:
case PHY_INTERFACE_MODE_REVMII:
case PHY_INTERFACE_MODE_MII:
caps |= MAC_10HD | MAC_10FD;
fallthrough;
case PHY_INTERFACE_MODE_100BASEX:
caps |= MAC_100HD | MAC_100FD;
break;
case PHY_INTERFACE_MODE_TBI:
case PHY_INTERFACE_MODE_MOCA:
case PHY_INTERFACE_MODE_RTBI:
case PHY_INTERFACE_MODE_1000BASEX:
caps |= MAC_1000HD;
fallthrough;
case PHY_INTERFACE_MODE_1000BASEKX:
case PHY_INTERFACE_MODE_TRGMII:
caps |= MAC_1000FD;
break;
case PHY_INTERFACE_MODE_2500BASEX:
caps |= MAC_2500FD;
break;
case PHY_INTERFACE_MODE_5GBASER:
caps |= MAC_5000FD;
break;
case PHY_INTERFACE_MODE_XGMII:
case PHY_INTERFACE_MODE_RXAUI:
case PHY_INTERFACE_MODE_XAUI:
case PHY_INTERFACE_MODE_10GBASER:
case PHY_INTERFACE_MODE_10GKR:
caps |= MAC_10000FD;
break;
case PHY_INTERFACE_MODE_25GBASER:
caps |= MAC_25000FD;
break;
case PHY_INTERFACE_MODE_XLGMII:
caps |= MAC_40000FD;
break;
case PHY_INTERFACE_MODE_INTERNAL:
caps |= ~0;
break;
case PHY_INTERFACE_MODE_NA:
case PHY_INTERFACE_MODE_MAX:
break;
}
switch (rate_matching) {
case RATE_MATCH_OPEN_LOOP:
/* TODO */
fallthrough;
case RATE_MATCH_NONE:
matched_caps = 0;
break;
case RATE_MATCH_PAUSE: {
/* The MAC must support asymmetric pause towards the local
* device for this. We could allow just symmetric pause, but
* then we might have to renegotiate if the link partner
* doesn't support pause. This is because there's no way to
* accept pause frames without transmitting them if we only
* support symmetric pause.
*/
if (!(mac_capabilities & MAC_SYM_PAUSE) ||
!(mac_capabilities & MAC_ASYM_PAUSE))
break;
/* We can't adapt if the MAC doesn't support the interface's
* max speed at full duplex.
*/
if (mac_capabilities &
phylink_cap_from_speed_duplex(max_speed, DUPLEX_FULL)) {
/* Although a duplex-matching phy might exist, we
* conservatively remove these modes because the MAC
* will not be aware of the half-duplex nature of the
* link.
*/
matched_caps = GENMASK(__fls(caps), __fls(MAC_10HD));
matched_caps &= ~(MAC_1000HD | MAC_100HD | MAC_10HD);
}
break;
}
case RATE_MATCH_CRS:
/* The MAC must support half duplex at the interface's max
* speed.
*/
if (mac_capabilities &
phylink_cap_from_speed_duplex(max_speed, DUPLEX_HALF)) {
matched_caps = GENMASK(__fls(caps), __fls(MAC_10HD));
matched_caps &= mac_capabilities;
}
break;
}
return (caps & mac_capabilities) | matched_caps;
}
EXPORT_SYMBOL_GPL(phylink_get_capabilities);
/**
* phylink_generic_validate() - generic validate() callback implementation
* @config: a pointer to a &struct phylink_config.
* @supported: ethtool bitmask for supported link modes.
* @state: a pointer to a &struct phylink_link_state.
*
* Generic implementation of the validate() callback that MAC drivers can
* use when they pass the range of supported interfaces and MAC capabilities.
* This makes use of phylink_get_linkmodes().
*/
void phylink_generic_validate(struct phylink_config *config,
unsigned long *supported,
struct phylink_link_state *state)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
unsigned long caps;
phylink_set_port_modes(mask);
phylink_set(mask, Autoneg);
caps = phylink_get_capabilities(state->interface,
config->mac_capabilities,
state->rate_matching);
phylink_caps_to_linkmodes(mask, caps);
linkmode_and(supported, supported, mask);
linkmode_and(state->advertising, state->advertising, mask);
}
EXPORT_SYMBOL_GPL(phylink_generic_validate);
static int phylink_validate_mac_and_pcs(struct phylink *pl,
unsigned long *supported,
struct phylink_link_state *state)
{
struct phylink_pcs *pcs;
int ret;
/* Get the PCS for this interface mode */
if (pl->using_mac_select_pcs) {
pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface);
if (IS_ERR(pcs))
return PTR_ERR(pcs);
} else {
pcs = pl->pcs;
}
if (pcs) {
/* The PCS, if present, must be setup before phylink_create()
* has been called. If the ops is not initialised, print an
* error and backtrace rather than oopsing the kernel.
*/
if (!pcs->ops) {
phylink_err(pl, "interface %s: uninitialised PCS\n",
phy_modes(state->interface));
dump_stack();
return -EINVAL;
}
/* Validate the link parameters with the PCS */
if (pcs->ops->pcs_validate) {
ret = pcs->ops->pcs_validate(pcs, supported, state);
if (ret < 0 || phylink_is_empty_linkmode(supported))
return -EINVAL;
/* Ensure the advertising mask is a subset of the
* supported mask.
*/
linkmode_and(state->advertising, state->advertising,
supported);
}
}
/* Then validate the link parameters with the MAC */
pl->mac_ops->validate(pl->config, supported, state);
return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
}
static int phylink_validate_mask(struct phylink *pl, unsigned long *supported,
struct phylink_link_state *state,
const unsigned long *interfaces)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(all_adv) = { 0, };
__ETHTOOL_DECLARE_LINK_MODE_MASK(all_s) = { 0, };
__ETHTOOL_DECLARE_LINK_MODE_MASK(s);
struct phylink_link_state t;
int intf;
for (intf = 0; intf < PHY_INTERFACE_MODE_MAX; intf++) {
if (test_bit(intf, interfaces)) {
linkmode_copy(s, supported);
t = *state;
t.interface = intf;
if (!phylink_validate_mac_and_pcs(pl, s, &t)) {
linkmode_or(all_s, all_s, s);
linkmode_or(all_adv, all_adv, t.advertising);
}
}
}
linkmode_copy(supported, all_s);
linkmode_copy(state->advertising, all_adv);
return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
}
static int phylink_validate(struct phylink *pl, unsigned long *supported,
struct phylink_link_state *state)
{
const unsigned long *interfaces = pl->config->supported_interfaces;
if (!phy_interface_empty(interfaces)) {
if (state->interface == PHY_INTERFACE_MODE_NA)
return phylink_validate_mask(pl, supported, state,
interfaces);
if (!test_bit(state->interface, interfaces))
return -EINVAL;
}
return phylink_validate_mac_and_pcs(pl, supported, state);
}
static int phylink_parse_fixedlink(struct phylink *pl,
struct fwnode_handle *fwnode)
{
struct fwnode_handle *fixed_node;
const struct phy_setting *s;
struct gpio_desc *desc;
u32 speed;
int ret;
fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link");
if (fixed_node) {
ret = fwnode_property_read_u32(fixed_node, "speed", &speed);
pl->link_config.speed = speed;
pl->link_config.duplex = DUPLEX_HALF;
if (fwnode_property_read_bool(fixed_node, "full-duplex"))
pl->link_config.duplex = DUPLEX_FULL;
/* We treat the "pause" and "asym-pause" terminology as
* defining the link partner's ability.
*/
if (fwnode_property_read_bool(fixed_node, "pause"))
__set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
pl->link_config.lp_advertising);
if (fwnode_property_read_bool(fixed_node, "asym-pause"))
__set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
pl->link_config.lp_advertising);
if (ret == 0) {
desc = fwnode_gpiod_get_index(fixed_node, "link", 0,
GPIOD_IN, "?");
if (!IS_ERR(desc))
pl->link_gpio = desc;
else if (desc == ERR_PTR(-EPROBE_DEFER))
ret = -EPROBE_DEFER;
}
fwnode_handle_put(fixed_node);
if (ret)
return ret;
} else {
u32 prop[5];
ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
NULL, 0);
if (ret != ARRAY_SIZE(prop)) {
phylink_err(pl, "broken fixed-link?\n");
return -EINVAL;
}
ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
prop, ARRAY_SIZE(prop));
if (!ret) {
pl->link_config.duplex = prop[1] ?
DUPLEX_FULL : DUPLEX_HALF;
pl->link_config.speed = prop[2];
if (prop[3])
__set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
pl->link_config.lp_advertising);
if (prop[4])
__set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
pl->link_config.lp_advertising);
}
}
if (pl->link_config.speed > SPEED_1000 &&
pl->link_config.duplex != DUPLEX_FULL)
phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n",
pl->link_config.speed);
bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
linkmode_copy(pl->link_config.advertising, pl->supported);
phylink_validate(pl, pl->supported, &pl->link_config);
s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
pl->supported, true);
linkmode_zero(pl->supported);
phylink_set(pl->supported, MII);
phylink_set(pl->supported, Pause);
phylink_set(pl->supported, Asym_Pause);
phylink_set(pl->supported, Autoneg);
if (s) {
__set_bit(s->bit, pl->supported);
__set_bit(s->bit, pl->link_config.lp_advertising);
} else {
phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n",
pl->link_config.duplex == DUPLEX_FULL ? "full" : "half",
pl->link_config.speed);
}
linkmode_and(pl->link_config.advertising, pl->link_config.advertising,
pl->supported);
pl->link_config.link = 1;
pl->link_config.an_complete = 1;
return 0;
}
static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode)
{
struct fwnode_handle *dn;
const char *managed;
dn = fwnode_get_named_child_node(fwnode, "fixed-link");
if (dn || fwnode_property_present(fwnode, "fixed-link"))
pl->cfg_link_an_mode = MLO_AN_FIXED;
fwnode_handle_put(dn);
if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 &&
strcmp(managed, "in-band-status") == 0) ||
pl->config->ovr_an_inband) {
if (pl->cfg_link_an_mode == MLO_AN_FIXED) {
phylink_err(pl,
"can't use both fixed-link and in-band-status\n");
return -EINVAL;
}
linkmode_zero(pl->supported);
phylink_set(pl->supported, MII);
phylink_set(pl->supported, Autoneg);
phylink_set(pl->supported, Asym_Pause);
phylink_set(pl->supported, Pause);
pl->link_config.an_enabled = true;
pl->cfg_link_an_mode = MLO_AN_INBAND;
switch (pl->link_config.interface) {
case PHY_INTERFACE_MODE_SGMII:
case PHY_INTERFACE_MODE_QSGMII:
case PHY_INTERFACE_MODE_QUSGMII:
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII_RXID:
case PHY_INTERFACE_MODE_RGMII_TXID:
case PHY_INTERFACE_MODE_RTBI:
phylink_set(pl->supported, 10baseT_Half);
phylink_set(pl->supported, 10baseT_Full);
phylink_set(pl->supported, 100baseT_Half);
phylink_set(pl->supported, 100baseT_Full);
phylink_set(pl->supported, 1000baseT_Half);
phylink_set(pl->supported, 1000baseT_Full);
break;
case PHY_INTERFACE_MODE_1000BASEX:
phylink_set(pl->supported, 1000baseX_Full);
break;
case PHY_INTERFACE_MODE_2500BASEX:
phylink_set(pl->supported, 2500baseX_Full);
break;
case PHY_INTERFACE_MODE_5GBASER:
phylink_set(pl->supported, 5000baseT_Full);
break;
case PHY_INTERFACE_MODE_25GBASER:
phylink_set(pl->supported, 25000baseCR_Full);
phylink_set(pl->supported, 25000baseKR_Full);
phylink_set(pl->supported, 25000baseSR_Full);
fallthrough;
case PHY_INTERFACE_MODE_USXGMII:
case PHY_INTERFACE_MODE_10GKR:
case PHY_INTERFACE_MODE_10GBASER:
phylink_set(pl->supported, 10baseT_Half);
phylink_set(pl->supported, 10baseT_Full);
phylink_set(pl->supported, 100baseT_Half);
phylink_set(pl->supported, 100baseT_Full);
phylink_set(pl->supported, 1000baseT_Half);
phylink_set(pl->supported, 1000baseT_Full);
phylink_set(pl->supported, 1000baseX_Full);
phylink_set(pl->supported, 1000baseKX_Full);
phylink_set(pl->supported, 2500baseT_Full);
phylink_set(pl->supported, 2500baseX_Full);
phylink_set(pl->supported, 5000baseT_Full);
phylink_set(pl->supported, 10000baseT_Full);
phylink_set(pl->supported, 10000baseKR_Full);
phylink_set(pl->supported, 10000baseKX4_Full);
phylink_set(pl->supported, 10000baseCR_Full);
phylink_set(pl->supported, 10000baseSR_Full);
phylink_set(pl->supported, 10000baseLR_Full);
phylink_set(pl->supported, 10000baseLRM_Full);
phylink_set(pl->supported, 10000baseER_Full);
break;
case PHY_INTERFACE_MODE_XLGMII:
phylink_set(pl->supported, 25000baseCR_Full);
phylink_set(pl->supported, 25000baseKR_Full);
phylink_set(pl->supported, 25000baseSR_Full);
phylink_set(pl->supported, 40000baseKR4_Full);
phylink_set(pl->supported, 40000baseCR4_Full);
phylink_set(pl->supported, 40000baseSR4_Full);
phylink_set(pl->supported, 40000baseLR4_Full);
phylink_set(pl->supported, 50000baseCR2_Full);
phylink_set(pl->supported, 50000baseKR2_Full);
phylink_set(pl->supported, 50000baseSR2_Full);
phylink_set(pl->supported, 50000baseKR_Full);
phylink_set(pl->supported, 50000baseSR_Full);
phylink_set(pl->supported, 50000baseCR_Full);
phylink_set(pl->supported, 50000baseLR_ER_FR_Full);
phylink_set(pl->supported, 50000baseDR_Full);
phylink_set(pl->supported, 100000baseKR4_Full);
phylink_set(pl->supported, 100000baseSR4_Full);
phylink_set(pl->supported, 100000baseCR4_Full);
phylink_set(pl->supported, 100000baseLR4_ER4_Full);
phylink_set(pl->supported, 100000baseKR2_Full);
phylink_set(pl->supported, 100000baseSR2_Full);
phylink_set(pl->supported, 100000baseCR2_Full);
phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full);
phylink_set(pl->supported, 100000baseDR2_Full);
break;
default:
phylink_err(pl,
"incorrect link mode %s for in-band status\n",
phy_modes(pl->link_config.interface));
return -EINVAL;
}
linkmode_copy(pl->link_config.advertising, pl->supported);
if (phylink_validate(pl, pl->supported, &pl->link_config)) {
phylink_err(pl,
"failed to validate link configuration for in-band status\n");
return -EINVAL;
}
/* Check if MAC/PCS also supports Autoneg. */
pl->link_config.an_enabled = phylink_test(pl->supported, Autoneg);
}
return 0;
}
static void phylink_apply_manual_flow(struct phylink *pl,
struct phylink_link_state *state)
{
/* If autoneg is disabled, pause AN is also disabled */
if (!state->an_enabled)
state->pause &= ~MLO_PAUSE_AN;
/* Manual configuration of pause modes */
if (!(pl->link_config.pause & MLO_PAUSE_AN))
state->pause = pl->link_config.pause;
}
static void phylink_resolve_flow(struct phylink_link_state *state)
{
bool tx_pause, rx_pause;
state->pause = MLO_PAUSE_NONE;
if (state->duplex == DUPLEX_FULL) {
linkmode_resolve_pause(state->advertising,
state->lp_advertising,
&tx_pause, &rx_pause);
if (tx_pause)
state->pause |= MLO_PAUSE_TX;
if (rx_pause)
state->pause |= MLO_PAUSE_RX;
}
}
static void phylink_pcs_poll_stop(struct phylink *pl)
{
if (pl->cfg_link_an_mode == MLO_AN_INBAND)
del_timer(&pl->link_poll);
}
static void phylink_pcs_poll_start(struct phylink *pl)
{
if (pl->pcs && pl->pcs->poll && pl->cfg_link_an_mode == MLO_AN_INBAND)
mod_timer(&pl->link_poll, jiffies + HZ);
}
static void phylink_mac_config(struct phylink *pl,
const struct phylink_link_state *state)
{
phylink_dbg(pl,
"%s: mode=%s/%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
__func__, phylink_an_mode_str(pl->cur_link_an_mode),
phy_modes(state->interface),
phy_speed_to_str(state->speed),
phy_duplex_to_str(state->duplex),
phy_rate_matching_to_str(state->rate_matching),
__ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
state->pause, state->link, state->an_enabled);
pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state);
}
static void phylink_mac_pcs_an_restart(struct phylink *pl)
{
if (pl->link_config.an_enabled &&
phy_interface_mode_is_8023z(pl->link_config.interface) &&
phylink_autoneg_inband(pl->cur_link_an_mode)) {
if (pl->pcs)
pl->pcs->ops->pcs_an_restart(pl->pcs);
else if (pl->config->legacy_pre_march2020)
pl->mac_ops->mac_an_restart(pl->config);
}
}
static void phylink_major_config(struct phylink *pl, bool restart,
const struct phylink_link_state *state)
{
struct phylink_pcs *pcs = NULL;
bool pcs_changed = false;
int err;
phylink_dbg(pl, "major config %s\n", phy_modes(state->interface));
if (pl->using_mac_select_pcs) {
pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface);
if (IS_ERR(pcs)) {
phylink_err(pl,
"mac_select_pcs unexpectedly failed: %pe\n",
pcs);
return;
}
pcs_changed = pcs && pl->pcs != pcs;
}
phylink_pcs_poll_stop(pl);
if (pl->mac_ops->mac_prepare) {
err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode,
state->interface);
if (err < 0) {
phylink_err(pl, "mac_prepare failed: %pe\n",
ERR_PTR(err));
return;
}
}
/* If we have a new PCS, switch to the new PCS after preparing the MAC
* for the change.
*/
if (pcs_changed)
pl->pcs = pcs;
phylink_mac_config(pl, state);
if (pl->pcs) {
err = pl->pcs->ops->pcs_config(pl->pcs, pl->cur_link_an_mode,
state->interface,
state->advertising,
!!(pl->link_config.pause &
MLO_PAUSE_AN));
if (err < 0)
phylink_err(pl, "pcs_config failed: %pe\n",
ERR_PTR(err));
if (err > 0)
restart = true;
}
if (restart)
phylink_mac_pcs_an_restart(pl);
if (pl->mac_ops->mac_finish) {
err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode,
state->interface);
if (err < 0)
phylink_err(pl, "mac_finish failed: %pe\n",
ERR_PTR(err));
}
phylink_pcs_poll_start(pl);
}
/*
* Reconfigure for a change of inband advertisement.
* If we have a separate PCS, we only need to call its pcs_config() method,
* and then restart AN if it indicates something changed. Otherwise, we do
* the full MAC reconfiguration.
*/
static int phylink_change_inband_advert(struct phylink *pl)
{
int ret;
if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state))
return 0;
if (!pl->pcs && pl->config->legacy_pre_march2020) {
/* Legacy method */
phylink_mac_config(pl, &pl->link_config);
phylink_mac_pcs_an_restart(pl);
return 0;
}
phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__,
phylink_an_mode_str(pl->cur_link_an_mode),
phy_modes(pl->link_config.interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising,
pl->link_config.pause);
/* Modern PCS-based method; update the advert at the PCS, and
* restart negotiation if the pcs_config() helper indicates that
* the programmed advertisement has changed.
*/
ret = pl->pcs->ops->pcs_config(pl->pcs, pl->cur_link_an_mode,
pl->link_config.interface,
pl->link_config.advertising,
!!(pl->link_config.pause &
MLO_PAUSE_AN));
if (ret < 0)
return ret;
if (ret > 0)
phylink_mac_pcs_an_restart(pl);
return 0;
}
static void phylink_mac_pcs_get_state(struct phylink *pl,
struct phylink_link_state *state)
{
linkmode_copy(state->advertising, pl->link_config.advertising);
linkmode_zero(state->lp_advertising);
state->interface = pl->link_config.interface;
state->an_enabled = pl->link_config.an_enabled;
state->rate_matching = pl->link_config.rate_matching;
if (state->an_enabled) {
state->speed = SPEED_UNKNOWN;
state->duplex = DUPLEX_UNKNOWN;
state->pause = MLO_PAUSE_NONE;
} else {
state->speed = pl->link_config.speed;
state->duplex = pl->link_config.duplex;
state->pause = pl->link_config.pause;
}
state->an_complete = 0;
state->link = 1;
if (pl->pcs)
pl->pcs->ops->pcs_get_state(pl->pcs, state);
else if (pl->mac_ops->mac_pcs_get_state &&
pl->config->legacy_pre_march2020)
pl->mac_ops->mac_pcs_get_state(pl->config, state);
else
state->link = 0;
}
/* The fixed state is... fixed except for the link state,
* which may be determined by a GPIO or a callback.
*/
static void phylink_get_fixed_state(struct phylink *pl,
struct phylink_link_state *state)
{
*state = pl->link_config;
if (pl->config->get_fixed_state)
pl->config->get_fixed_state(pl->config, state);
else if (pl->link_gpio)
state->link = !!gpiod_get_value_cansleep(pl->link_gpio);
phylink_resolve_flow(state);
}
static void phylink_mac_initial_config(struct phylink *pl, bool force_restart)
{
struct phylink_link_state link_state;
switch (pl->cur_link_an_mode) {
case MLO_AN_PHY:
link_state = pl->phy_state;
break;
case MLO_AN_FIXED:
phylink_get_fixed_state(pl, &link_state);
break;
case MLO_AN_INBAND:
link_state = pl->link_config;
if (link_state.interface == PHY_INTERFACE_MODE_SGMII)
link_state.pause = MLO_PAUSE_NONE;
break;
default: /* can't happen */
return;
}
link_state.link = false;
phylink_apply_manual_flow(pl, &link_state);
phylink_major_config(pl, force_restart, &link_state);
}
static const char *phylink_pause_to_str(int pause)
{
switch (pause & MLO_PAUSE_TXRX_MASK) {
case MLO_PAUSE_TX | MLO_PAUSE_RX:
return "rx/tx";
case MLO_PAUSE_TX:
return "tx";
case MLO_PAUSE_RX:
return "rx";
default:
return "off";
}
}
static void phylink_link_up(struct phylink *pl,
struct phylink_link_state link_state)
{
struct net_device *ndev = pl->netdev;
int speed, duplex;
bool rx_pause;
speed = link_state.speed;
duplex = link_state.duplex;
rx_pause = !!(link_state.pause & MLO_PAUSE_RX);
switch (link_state.rate_matching) {
case RATE_MATCH_PAUSE:
/* The PHY is doing rate matchion from the media rate (in
* the link_state) to the interface speed, and will send
* pause frames to the MAC to limit its transmission speed.
*/
speed = phylink_interface_max_speed(link_state.interface);
duplex = DUPLEX_FULL;
rx_pause = true;
break;
case RATE_MATCH_CRS:
/* The PHY is doing rate matchion from the media rate (in
* the link_state) to the interface speed, and will cause
* collisions to the MAC to limit its transmission speed.
*/
speed = phylink_interface_max_speed(link_state.interface);
duplex = DUPLEX_HALF;
break;
}
pl->cur_interface = link_state.interface;
if (pl->pcs && pl->pcs->ops->pcs_link_up)
pl->pcs->ops->pcs_link_up(pl->pcs, pl->cur_link_an_mode,
pl->cur_interface, speed, duplex);
pl->mac_ops->mac_link_up(pl->config, pl->phydev, pl->cur_link_an_mode,
pl->cur_interface, speed, duplex,
!!(link_state.pause & MLO_PAUSE_TX), rx_pause);
if (ndev)
netif_carrier_on(ndev);
phylink_info(pl,
"Link is Up - %s/%s - flow control %s\n",
phy_speed_to_str(link_state.speed),
phy_duplex_to_str(link_state.duplex),
phylink_pause_to_str(link_state.pause));
}
static void phylink_link_down(struct phylink *pl)
{
struct net_device *ndev = pl->netdev;
if (ndev)
netif_carrier_off(ndev);
pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode,
pl->cur_interface);
phylink_info(pl, "Link is Down\n");
}
static void phylink_resolve(struct work_struct *w)
{
struct phylink *pl = container_of(w, struct phylink, resolve);
struct phylink_link_state link_state;
struct net_device *ndev = pl->netdev;
bool mac_config = false;
bool retrigger = false;
bool cur_link_state;
mutex_lock(&pl->state_mutex);
if (pl->netdev)
cur_link_state = netif_carrier_ok(ndev);
else
cur_link_state = pl->old_link_state;
if (pl->phylink_disable_state) {
pl->mac_link_dropped = false;
link_state.link = false;
} else if (pl->mac_link_dropped) {
link_state.link = false;
retrigger = true;
} else {
switch (pl->cur_link_an_mode) {
case MLO_AN_PHY:
link_state = pl->phy_state;
phylink_apply_manual_flow(pl, &link_state);
mac_config = link_state.link;
break;
case MLO_AN_FIXED:
phylink_get_fixed_state(pl, &link_state);
mac_config = link_state.link;
break;
case MLO_AN_INBAND:
phylink_mac_pcs_get_state(pl, &link_state);
/* The PCS may have a latching link-fail indicator.
* If the link was up, bring the link down and
* re-trigger the resolve. Otherwise, re-read the
* PCS state to get the current status of the link.
*/
if (!link_state.link) {
if (cur_link_state)
retrigger = true;
else
phylink_mac_pcs_get_state(pl,
&link_state);
}
/* If we have a phy, the "up" state is the union of
* both the PHY and the MAC
*/
if (pl->phydev)
link_state.link &= pl->phy_state.link;
/* Only update if the PHY link is up */
if (pl->phydev && pl->phy_state.link) {
/* If the interface has changed, force a
* link down event if the link isn't already
* down, and re-resolve.
*/
if (link_state.interface !=
pl->phy_state.interface) {
retrigger = true;
link_state.link = false;
}
link_state.interface = pl->phy_state.interface;
/* If we are doing rate matching, then the
* link speed/duplex comes from the PHY
*/
if (pl->phy_state.rate_matching) {
link_state.rate_matching =
pl->phy_state.rate_matching;
link_state.speed = pl->phy_state.speed;
link_state.duplex =
pl->phy_state.duplex;
}
/* If we have a PHY, we need to update with
* the PHY flow control bits.
*/
link_state.pause = pl->phy_state.pause;
mac_config = true;
}
phylink_apply_manual_flow(pl, &link_state);
break;
}
}
if (mac_config) {
if (link_state.interface != pl->link_config.interface) {
/* The interface has changed, force the link down and
* then reconfigure.
*/
if (cur_link_state) {
phylink_link_down(pl);
cur_link_state = false;
}
phylink_major_config(pl, false, &link_state);
pl->link_config.interface = link_state.interface;
} else if (!pl->pcs && pl->config->legacy_pre_march2020) {
/* The interface remains unchanged, only the speed,
* duplex or pause settings have changed. Call the
* old mac_config() method to configure the MAC/PCS
* only if we do not have a legacy MAC driver.
*/
phylink_mac_config(pl, &link_state);
}
}
if (link_state.link != cur_link_state) {
pl->old_link_state = link_state.link;
if (!link_state.link)
phylink_link_down(pl);
else
phylink_link_up(pl, link_state);
}
if (!link_state.link && retrigger) {
pl->mac_link_dropped = false;
queue_work(system_power_efficient_wq, &pl->resolve);
}
mutex_unlock(&pl->state_mutex);
}
static void phylink_run_resolve(struct phylink *pl)
{
if (!pl->phylink_disable_state)
queue_work(system_power_efficient_wq, &pl->resolve);
}
static void phylink_run_resolve_and_disable(struct phylink *pl, int bit)
{
unsigned long state = pl->phylink_disable_state;
set_bit(bit, &pl->phylink_disable_state);
if (state == 0) {
queue_work(system_power_efficient_wq, &pl->resolve);
flush_work(&pl->resolve);
}
}
static void phylink_enable_and_run_resolve(struct phylink *pl, int bit)
{
clear_bit(bit, &pl->phylink_disable_state);
phylink_run_resolve(pl);
}
static void phylink_fixed_poll(struct timer_list *t)
{
struct phylink *pl = container_of(t, struct phylink, link_poll);
mod_timer(t, jiffies + HZ);
phylink_run_resolve(pl);
}
static const struct sfp_upstream_ops sfp_phylink_ops;
static int phylink_register_sfp(struct phylink *pl,
struct fwnode_handle *fwnode)
{
struct sfp_bus *bus;
int ret;
if (!fwnode)
return 0;
bus = sfp_bus_find_fwnode(fwnode);
if (IS_ERR(bus)) {
phylink_err(pl, "unable to attach SFP bus: %pe\n", bus);
return PTR_ERR(bus);
}
pl->sfp_bus = bus;
ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops);
sfp_bus_put(bus);
return ret;
}
/**
* phylink_create() - create a phylink instance
* @config: a pointer to the target &struct phylink_config
* @fwnode: a pointer to a &struct fwnode_handle describing the network
* interface
* @iface: the desired link mode defined by &typedef phy_interface_t
* @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC.
*
* Create a new phylink instance, and parse the link parameters found in @np.
* This will parse in-band modes, fixed-link or SFP configuration.
*
* Note: the rtnl lock must not be held when calling this function.
*
* Returns a pointer to a &struct phylink, or an error-pointer value. Users
* must use IS_ERR() to check for errors from this function.
*/
struct phylink *phylink_create(struct phylink_config *config,
struct fwnode_handle *fwnode,
phy_interface_t iface,
const struct phylink_mac_ops *mac_ops)
{
bool using_mac_select_pcs = false;
struct phylink *pl;
int ret;
if (mac_ops->mac_select_pcs &&
mac_ops->mac_select_pcs(config, PHY_INTERFACE_MODE_NA) !=
ERR_PTR(-EOPNOTSUPP))
using_mac_select_pcs = true;
/* Validate the supplied configuration */
if (using_mac_select_pcs &&
phy_interface_empty(config->supported_interfaces)) {
dev_err(config->dev,
"phylink: error: empty supported_interfaces but mac_select_pcs() method present\n");
return ERR_PTR(-EINVAL);
}
pl = kzalloc(sizeof(*pl), GFP_KERNEL);
if (!pl)
return ERR_PTR(-ENOMEM);
mutex_init(&pl->state_mutex);
INIT_WORK(&pl->resolve, phylink_resolve);
pl->config = config;
if (config->type == PHYLINK_NETDEV) {
pl->netdev = to_net_dev(config->dev);
} else if (config->type == PHYLINK_DEV) {
pl->dev = config->dev;
} else {
kfree(pl);
return ERR_PTR(-EINVAL);
}
pl->using_mac_select_pcs = using_mac_select_pcs;
pl->phy_state.interface = iface;
pl->link_interface = iface;
if (iface == PHY_INTERFACE_MODE_MOCA)
pl->link_port = PORT_BNC;
else
pl->link_port = PORT_MII;
pl->link_config.interface = iface;
pl->link_config.pause = MLO_PAUSE_AN;
pl->link_config.speed = SPEED_UNKNOWN;
pl->link_config.duplex = DUPLEX_UNKNOWN;
pl->link_config.an_enabled = true;
pl->mac_ops = mac_ops;
__set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
timer_setup(&pl->link_poll, phylink_fixed_poll, 0);
bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
linkmode_copy(pl->link_config.advertising, pl->supported);
phylink_validate(pl, pl->supported, &pl->link_config);
ret = phylink_parse_mode(pl, fwnode);
if (ret < 0) {
kfree(pl);
return ERR_PTR(ret);
}
if (pl->cfg_link_an_mode == MLO_AN_FIXED) {
ret = phylink_parse_fixedlink(pl, fwnode);
if (ret < 0) {
kfree(pl);
return ERR_PTR(ret);
}
}
pl->cur_link_an_mode = pl->cfg_link_an_mode;
ret = phylink_register_sfp(pl, fwnode);
if (ret < 0) {
kfree(pl);
return ERR_PTR(ret);
}
return pl;
}
EXPORT_SYMBOL_GPL(phylink_create);
/**
* phylink_destroy() - cleanup and destroy the phylink instance
* @pl: a pointer to a &struct phylink returned from phylink_create()
*
* Destroy a phylink instance. Any PHY that has been attached must have been
* cleaned up via phylink_disconnect_phy() prior to calling this function.
*
* Note: the rtnl lock must not be held when calling this function.
*/
void phylink_destroy(struct phylink *pl)
{
sfp_bus_del_upstream(pl->sfp_bus);
if (pl->link_gpio)
gpiod_put(pl->link_gpio);
cancel_work_sync(&pl->resolve);
kfree(pl);
}
EXPORT_SYMBOL_GPL(phylink_destroy);
/**
* phylink_expects_phy() - Determine if phylink expects a phy to be attached
* @pl: a pointer to a &struct phylink returned from phylink_create()
*
* When using fixed-link mode, or in-band mode with 1000base-X or 2500base-X,
* no PHY is needed.
*
* Returns true if phylink will be expecting a PHY.
*/
bool phylink_expects_phy(struct phylink *pl)
{
if (pl->cfg_link_an_mode == MLO_AN_FIXED ||
(pl->cfg_link_an_mode == MLO_AN_INBAND &&
phy_interface_mode_is_8023z(pl->link_config.interface)))
return false;
return true;
}
EXPORT_SYMBOL_GPL(phylink_expects_phy);
static void phylink_phy_change(struct phy_device *phydev, bool up)
{
struct phylink *pl = phydev->phylink;
bool tx_pause, rx_pause;
phy_get_pause(phydev, &tx_pause, &rx_pause);
mutex_lock(&pl->state_mutex);
pl->phy_state.speed = phydev->speed;
pl->phy_state.duplex = phydev->duplex;
pl->phy_state.rate_matching = phydev->rate_matching;
pl->phy_state.pause = MLO_PAUSE_NONE;
if (tx_pause)
pl->phy_state.pause |= MLO_PAUSE_TX;
if (rx_pause)
pl->phy_state.pause |= MLO_PAUSE_RX;
pl->phy_state.interface = phydev->interface;
pl->phy_state.link = up;
mutex_unlock(&pl->state_mutex);
phylink_run_resolve(pl);
phylink_dbg(pl, "phy link %s %s/%s/%s/%s/%s\n", up ? "up" : "down",
phy_modes(phydev->interface),
phy_speed_to_str(phydev->speed),
phy_duplex_to_str(phydev->duplex),
phy_rate_matching_to_str(phydev->rate_matching),
phylink_pause_to_str(pl->phy_state.pause));
}
static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy,
phy_interface_t interface)
{
struct phylink_link_state config;
__ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
char *irq_str;
int ret;
/*
* This is the new way of dealing with flow control for PHYs,
* as described by Timur Tabi in commit 529ed1275263 ("net: phy:
* phy drivers should not set SUPPORTED_[Asym_]Pause") except
* using our validate call to the MAC, we rely upon the MAC
* clearing the bits from both supported and advertising fields.
*/
phy_support_asym_pause(phy);
memset(&config, 0, sizeof(config));
linkmode_copy(supported, phy->supported);
linkmode_copy(config.advertising, phy->advertising);
/* Check whether we would use rate matching for the proposed interface
* mode.
*/
config.rate_matching = phy_get_rate_matching(phy, interface);
/* Clause 45 PHYs may switch their Serdes lane between, e.g. 10GBASE-R,
* 5GBASE-R, 2500BASE-X and SGMII if they are not using rate matching.
* For some interface modes (e.g. RXAUI, XAUI and USXGMII) switching
* their Serdes is either unnecessary or not reasonable.
*
* For these which switch interface modes, we really need to know which
* interface modes the PHY supports to properly work out which ethtool
* linkmodes can be supported. For now, as a work-around, we validate
* against all interface modes, which may lead to more ethtool link
* modes being advertised than are actually supported.
*/
if (phy->is_c45 && config.rate_matching == RATE_MATCH_NONE &&
interface != PHY_INTERFACE_MODE_RXAUI &&
interface != PHY_INTERFACE_MODE_XAUI &&
interface != PHY_INTERFACE_MODE_USXGMII)
config.interface = PHY_INTERFACE_MODE_NA;
else
config.interface = interface;
ret = phylink_validate(pl, supported, &config);
if (ret) {
phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %pe\n",
phy_modes(config.interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported,
__ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising,
ERR_PTR(ret));
return ret;
}
phy->phylink = pl;
phy->phy_link_change = phylink_phy_change;
irq_str = phy_attached_info_irq(phy);
phylink_info(pl,
"PHY [%s] driver [%s] (irq=%s)\n",
dev_name(&phy->mdio.dev), phy->drv->name, irq_str);
kfree(irq_str);
mutex_lock(&phy->lock);
mutex_lock(&pl->state_mutex);
pl->phydev = phy;
pl->phy_state.interface = interface;
pl->phy_state.pause = MLO_PAUSE_NONE;
pl->phy_state.speed = SPEED_UNKNOWN;
pl->phy_state.duplex = DUPLEX_UNKNOWN;
pl->phy_state.rate_matching = RATE_MATCH_NONE;
linkmode_copy(pl->supported, supported);
linkmode_copy(pl->link_config.advertising, config.advertising);
/* Restrict the phy advertisement according to the MAC support. */
linkmode_copy(phy->advertising, config.advertising);
mutex_unlock(&pl->state_mutex);
mutex_unlock(&phy->lock);
phylink_dbg(pl,
"phy: %s setting supported %*pb advertising %*pb\n",
phy_modes(interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
__ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising);
if (phy_interrupt_is_valid(phy))
phy_request_interrupt(phy);
if (pl->config->mac_managed_pm)
phy->mac_managed_pm = true;
return 0;
}
static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy,
phy_interface_t interface)
{
if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED ||
(pl->cfg_link_an_mode == MLO_AN_INBAND &&
phy_interface_mode_is_8023z(interface) && !pl->sfp_bus)))
return -EINVAL;
if (pl->phydev)
return -EBUSY;
return phy_attach_direct(pl->netdev, phy, 0, interface);
}
/**
* phylink_connect_phy() - connect a PHY to the phylink instance
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @phy: a pointer to a &struct phy_device.
*
* Connect @phy to the phylink instance specified by @pl by calling
* phy_attach_direct(). Configure the @phy according to the MAC driver's
* capabilities, start the PHYLIB state machine and enable any interrupts
* that the PHY supports.
*
* This updates the phylink's ethtool supported and advertising link mode
* masks.
*
* Returns 0 on success or a negative errno.
*/
int phylink_connect_phy(struct phylink *pl, struct phy_device *phy)
{
int ret;
/* Use PHY device/driver interface */
if (pl->link_interface == PHY_INTERFACE_MODE_NA) {
pl->link_interface = phy->interface;
pl->link_config.interface = pl->link_interface;
}
ret = phylink_attach_phy(pl, phy, pl->link_interface);
if (ret < 0)
return ret;
ret = phylink_bringup_phy(pl, phy, pl->link_config.interface);
if (ret)
phy_detach(phy);
return ret;
}
EXPORT_SYMBOL_GPL(phylink_connect_phy);
/**
* phylink_of_phy_connect() - connect the PHY specified in the DT mode.
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @dn: a pointer to a &struct device_node.
* @flags: PHY-specific flags to communicate to the PHY device driver
*
* Connect the phy specified in the device node @dn to the phylink instance
* specified by @pl. Actions specified in phylink_connect_phy() will be
* performed.
*
* Returns 0 on success or a negative errno.
*/
int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn,
u32 flags)
{
return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags);
}
EXPORT_SYMBOL_GPL(phylink_of_phy_connect);
/**
* phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode.
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @fwnode: a pointer to a &struct fwnode_handle.
* @flags: PHY-specific flags to communicate to the PHY device driver
*
* Connect the phy specified @fwnode to the phylink instance specified
* by @pl.
*
* Returns 0 on success or a negative errno.
*/
int phylink_fwnode_phy_connect(struct phylink *pl,
struct fwnode_handle *fwnode,
u32 flags)
{
struct fwnode_handle *phy_fwnode;
struct phy_device *phy_dev;
int ret;
/* Fixed links and 802.3z are handled without needing a PHY */
if (pl->cfg_link_an_mode == MLO_AN_FIXED ||
(pl->cfg_link_an_mode == MLO_AN_INBAND &&
phy_interface_mode_is_8023z(pl->link_interface)))
return 0;
phy_fwnode = fwnode_get_phy_node(fwnode);
if (IS_ERR(phy_fwnode)) {
if (pl->cfg_link_an_mode == MLO_AN_PHY)
return -ENODEV;
return 0;
}
phy_dev = fwnode_phy_find_device(phy_fwnode);
/* We're done with the phy_node handle */
fwnode_handle_put(phy_fwnode);
if (!phy_dev)
return -ENODEV;
/* Use PHY device/driver interface */
if (pl->link_interface == PHY_INTERFACE_MODE_NA) {
pl->link_interface = phy_dev->interface;
pl->link_config.interface = pl->link_interface;
}
ret = phy_attach_direct(pl->netdev, phy_dev, flags,
pl->link_interface);
phy_device_free(phy_dev);
if (ret)
return ret;
ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface);
if (ret)
phy_detach(phy_dev);
return ret;
}
EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect);
/**
* phylink_disconnect_phy() - disconnect any PHY attached to the phylink
* instance.
* @pl: a pointer to a &struct phylink returned from phylink_create()
*
* Disconnect any current PHY from the phylink instance described by @pl.
*/
void phylink_disconnect_phy(struct phylink *pl)
{
struct phy_device *phy;
ASSERT_RTNL();
phy = pl->phydev;
if (phy) {
mutex_lock(&phy->lock);
mutex_lock(&pl->state_mutex);
pl->phydev = NULL;
mutex_unlock(&pl->state_mutex);
mutex_unlock(&phy->lock);
flush_work(&pl->resolve);
phy_disconnect(phy);
}
}
EXPORT_SYMBOL_GPL(phylink_disconnect_phy);
/**
* phylink_mac_change() - notify phylink of a change in MAC state
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @up: indicates whether the link is currently up.
*
* The MAC driver should call this driver when the state of its link
* changes (eg, link failure, new negotiation results, etc.)
*/
void phylink_mac_change(struct phylink *pl, bool up)
{
if (!up)
pl->mac_link_dropped = true;
phylink_run_resolve(pl);
phylink_dbg(pl, "mac link %s\n", up ? "up" : "down");
}
EXPORT_SYMBOL_GPL(phylink_mac_change);
static irqreturn_t phylink_link_handler(int irq, void *data)
{
struct phylink *pl = data;
phylink_run_resolve(pl);
return IRQ_HANDLED;
}
/**
* phylink_start() - start a phylink instance
* @pl: a pointer to a &struct phylink returned from phylink_create()
*
* Start the phylink instance specified by @pl, configuring the MAC for the
* desired link mode(s) and negotiation style. This should be called from the
* network device driver's &struct net_device_ops ndo_open() method.
*/
void phylink_start(struct phylink *pl)
{
bool poll = false;
ASSERT_RTNL();
phylink_info(pl, "configuring for %s/%s link mode\n",
phylink_an_mode_str(pl->cur_link_an_mode),
phy_modes(pl->link_config.interface));
/* Always set the carrier off */
if (pl->netdev)
netif_carrier_off(pl->netdev);
/* Apply the link configuration to the MAC when starting. This allows
* a fixed-link to start with the correct parameters, and also
* ensures that we set the appropriate advertisement for Serdes links.
*
* Restart autonegotiation if using 802.3z to ensure that the link
* parameters are properly negotiated. This is necessary for DSA
* switches using 802.3z negotiation to ensure they see our modes.
*/
phylink_mac_initial_config(pl, true);
phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_STOPPED);
if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) {
int irq = gpiod_to_irq(pl->link_gpio);
if (irq > 0) {
if (!request_irq(irq, phylink_link_handler,
IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING,
"netdev link", pl))
pl->link_irq = irq;
else
irq = 0;
}
if (irq <= 0)
poll = true;
}
switch (pl->cfg_link_an_mode) {
case MLO_AN_FIXED:
poll |= pl->config->poll_fixed_state;
break;
case MLO_AN_INBAND:
if (pl->pcs)
poll |= pl->pcs->poll;
break;
}
if (poll)
mod_timer(&pl->link_poll, jiffies + HZ);
if (pl->phydev)
phy_start(pl->phydev);
if (pl->sfp_bus)
sfp_upstream_start(pl->sfp_bus);
}
EXPORT_SYMBOL_GPL(phylink_start);
/**
* phylink_stop() - stop a phylink instance
* @pl: a pointer to a &struct phylink returned from phylink_create()
*
* Stop the phylink instance specified by @pl. This should be called from the
* network device driver's &struct net_device_ops ndo_stop() method. The
* network device's carrier state should not be changed prior to calling this
* function.
*
* This will synchronously bring down the link if the link is not already
* down (in other words, it will trigger a mac_link_down() method call.)
*/
void phylink_stop(struct phylink *pl)
{
ASSERT_RTNL();
if (pl->sfp_bus)
sfp_upstream_stop(pl->sfp_bus);
if (pl->phydev)
phy_stop(pl->phydev);
del_timer_sync(&pl->link_poll);
if (pl->link_irq) {
free_irq(pl->link_irq, pl);
pl->link_irq = 0;
}
phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);
}
EXPORT_SYMBOL_GPL(phylink_stop);
/**
* phylink_suspend() - handle a network device suspend event
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan
*
* Handle a network device suspend event. There are several cases:
*
* - If Wake-on-Lan is not active, we can bring down the link between
* the MAC and PHY by calling phylink_stop().
* - If Wake-on-Lan is active, and being handled only by the PHY, we
* can also bring down the link between the MAC and PHY.
* - If Wake-on-Lan is active, but being handled by the MAC, the MAC
* still needs to receive packets, so we can not bring the link down.
*/
void phylink_suspend(struct phylink *pl, bool mac_wol)
{
ASSERT_RTNL();
if (mac_wol && (!pl->netdev || pl->netdev->wol_enabled)) {
/* Wake-on-Lan enabled, MAC handling */
mutex_lock(&pl->state_mutex);
/* Stop the resolver bringing the link up */
__set_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state);
/* Disable the carrier, to prevent transmit timeouts,
* but one would hope all packets have been sent. This
* also means phylink_resolve() will do nothing.
*/
if (pl->netdev)
netif_carrier_off(pl->netdev);
else
pl->old_link_state = false;
/* We do not call mac_link_down() here as we want the
* link to remain up to receive the WoL packets.
*/
mutex_unlock(&pl->state_mutex);
} else {
phylink_stop(pl);
}
}
EXPORT_SYMBOL_GPL(phylink_suspend);
/**
* phylink_resume() - handle a network device resume event
* @pl: a pointer to a &struct phylink returned from phylink_create()
*
* Undo the effects of phylink_suspend(), returning the link to an
* operational state.
*/
void phylink_resume(struct phylink *pl)
{
ASSERT_RTNL();
if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) {
/* Wake-on-Lan enabled, MAC handling */
/* Call mac_link_down() so we keep the overall state balanced.
* Do this under the state_mutex lock for consistency. This
* will cause a "Link Down" message to be printed during
* resume, which is harmless - the true link state will be
* printed when we run a resolve.
*/
mutex_lock(&pl->state_mutex);
phylink_link_down(pl);
mutex_unlock(&pl->state_mutex);
/* Re-apply the link parameters so that all the settings get
* restored to the MAC.
*/
phylink_mac_initial_config(pl, true);
/* Re-enable and re-resolve the link parameters */
phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_MAC_WOL);
} else {
phylink_start(pl);
}
}
EXPORT_SYMBOL_GPL(phylink_resume);
/**
* phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters
*
* Read the wake on lan parameters from the PHY attached to the phylink
* instance specified by @pl. If no PHY is currently attached, report no
* support for wake on lan.
*/
void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
{
ASSERT_RTNL();
wol->supported = 0;
wol->wolopts = 0;
if (pl->phydev)
phy_ethtool_get_wol(pl->phydev, wol);
}
EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol);
/**
* phylink_ethtool_set_wol() - set wake on lan parameters
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @wol: a pointer to &struct ethtool_wolinfo for the desired parameters
*
* Set the wake on lan parameters for the PHY attached to the phylink
* instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP
* error.
*
* Returns zero on success or negative errno code.
*/
int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
{
int ret = -EOPNOTSUPP;
ASSERT_RTNL();
if (pl->phydev)
ret = phy_ethtool_set_wol(pl->phydev, wol);
return ret;
}
EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol);
static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(mask);
linkmode_zero(mask);
phylink_set_port_modes(mask);
linkmode_and(dst, dst, mask);
linkmode_or(dst, dst, b);
}
static void phylink_get_ksettings(const struct phylink_link_state *state,
struct ethtool_link_ksettings *kset)
{
phylink_merge_link_mode(kset->link_modes.advertising, state->advertising);
linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising);
if (kset->base.rate_matching == RATE_MATCH_NONE) {
kset->base.speed = state->speed;
kset->base.duplex = state->duplex;
}
kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE :
AUTONEG_DISABLE;
}
/**
* phylink_ethtool_ksettings_get() - get the current link settings
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings
*
* Read the current link settings for the phylink instance specified by @pl.
* This will be the link settings read from the MAC, PHY or fixed link
* settings depending on the current negotiation mode.
*/
int phylink_ethtool_ksettings_get(struct phylink *pl,
struct ethtool_link_ksettings *kset)
{
struct phylink_link_state link_state;
ASSERT_RTNL();
if (pl->phydev)
phy_ethtool_ksettings_get(pl->phydev, kset);
else
kset->base.port = pl->link_port;
linkmode_copy(kset->link_modes.supported, pl->supported);
switch (pl->cur_link_an_mode) {
case MLO_AN_FIXED:
/* We are using fixed settings. Report these as the
* current link settings - and note that these also
* represent the supported speeds/duplex/pause modes.
*/
phylink_get_fixed_state(pl, &link_state);
phylink_get_ksettings(&link_state, kset);
break;
case MLO_AN_INBAND:
/* If there is a phy attached, then use the reported
* settings from the phy with no modification.
*/
if (pl->phydev)
break;
phylink_mac_pcs_get_state(pl, &link_state);
/* The MAC is reporting the link results from its own PCS
* layer via in-band status. Report these as the current
* link settings.
*/
phylink_get_ksettings(&link_state, kset);
break;
}
return 0;
}
EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get);
/**
* phylink_ethtool_ksettings_set() - set the link settings
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes
*/
int phylink_ethtool_ksettings_set(struct phylink *pl,
const struct ethtool_link_ksettings *kset)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(support);
struct phylink_link_state config;
const struct phy_setting *s;
ASSERT_RTNL();
if (pl->phydev) {
/* We can rely on phylib for this update; we also do not need
* to update the pl->link_config settings:
* - the configuration returned via ksettings_get() will come
* from phylib whenever a PHY is present.
* - link_config.interface will be updated by the PHY calling
* back via phylink_phy_change() and a subsequent resolve.
* - initial link configuration for PHY mode comes from the
* last phy state updated via phylink_phy_change().
* - other configuration changes (e.g. pause modes) are
* performed directly via phylib.
* - if in in-band mode with a PHY, the link configuration
* is passed on the link from the PHY, and all of
* link_config.{speed,duplex,an_enabled,pause} are not used.
* - the only possible use would be link_config.advertising
* pause modes when in 1000base-X mode with a PHY, but in
* the presence of a PHY, this should not be changed as that
* should be determined from the media side advertisement.
*/
return phy_ethtool_ksettings_set(pl->phydev, kset);
}
config = pl->link_config;
/* Mask out unsupported advertisements */
linkmode_and(config.advertising, kset->link_modes.advertising,
pl->supported);
/* FIXME: should we reject autoneg if phy/mac does not support it? */
switch (kset->base.autoneg) {
case AUTONEG_DISABLE:
/* Autonegotiation disabled, select a suitable speed and
* duplex.
*/
s = phy_lookup_setting(kset->base.speed, kset->base.duplex,
pl->supported, false);
if (!s)
return -EINVAL;
/* If we have a fixed link, refuse to change link parameters.
* If the link parameters match, accept them but do nothing.
*/
if (pl->cur_link_an_mode == MLO_AN_FIXED) {
if (s->speed != pl->link_config.speed ||
s->duplex != pl->link_config.duplex)
return -EINVAL;
return 0;
}
config.speed = s->speed;
config.duplex = s->duplex;
break;
case AUTONEG_ENABLE:
/* If we have a fixed link, allow autonegotiation (since that
* is our default case) but do not allow the advertisement to
* be changed. If the advertisement matches, simply return.
*/
if (pl->cur_link_an_mode == MLO_AN_FIXED) {
if (!linkmode_equal(config.advertising,
pl->link_config.advertising))
return -EINVAL;
return 0;
}
config.speed = SPEED_UNKNOWN;
config.duplex = DUPLEX_UNKNOWN;
break;
default:
return -EINVAL;
}
/* We have ruled out the case with a PHY attached, and the
* fixed-link cases. All that is left are in-band links.
*/
config.an_enabled = kset->base.autoneg == AUTONEG_ENABLE;
linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising,
config.an_enabled);
/* If this link is with an SFP, ensure that changes to advertised modes
* also cause the associated interface to be selected such that the
* link can be configured correctly.
*/
if (pl->sfp_bus) {
config.interface = sfp_select_interface(pl->sfp_bus,
config.advertising);
if (config.interface == PHY_INTERFACE_MODE_NA) {
phylink_err(pl,
"selection of interface failed, advertisement %*pb\n",
__ETHTOOL_LINK_MODE_MASK_NBITS,
config.advertising);
return -EINVAL;
}
/* Revalidate with the selected interface */
linkmode_copy(support, pl->supported);
if (phylink_validate(pl, support, &config)) {
phylink_err(pl, "validation of %s/%s with support %*pb failed\n",
phylink_an_mode_str(pl->cur_link_an_mode),
phy_modes(config.interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, support);
return -EINVAL;
}
} else {
/* Validate without changing the current supported mask. */
linkmode_copy(support, pl->supported);
if (phylink_validate(pl, support, &config))
return -EINVAL;
}
/* If autonegotiation is enabled, we must have an advertisement */
if (config.an_enabled && phylink_is_empty_linkmode(config.advertising))
return -EINVAL;
mutex_lock(&pl->state_mutex);
pl->link_config.speed = config.speed;
pl->link_config.duplex = config.duplex;
pl->link_config.an_enabled = config.an_enabled;
if (pl->link_config.interface != config.interface) {
/* The interface changed, e.g. 1000base-X <-> 2500base-X */
/* We need to force the link down, then change the interface */
if (pl->old_link_state) {
phylink_link_down(pl);
pl->old_link_state = false;
}
if (!test_bit(PHYLINK_DISABLE_STOPPED,
&pl->phylink_disable_state))
phylink_major_config(pl, false, &config);
pl->link_config.interface = config.interface;
linkmode_copy(pl->link_config.advertising, config.advertising);
} else if (!linkmode_equal(pl->link_config.advertising,
config.advertising)) {
linkmode_copy(pl->link_config.advertising, config.advertising);
phylink_change_inband_advert(pl);
}
mutex_unlock(&pl->state_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);
/**
* phylink_ethtool_nway_reset() - restart negotiation
* @pl: a pointer to a &struct phylink returned from phylink_create()
*
* Restart negotiation for the phylink instance specified by @pl. This will
* cause any attached phy to restart negotiation with the link partner, and
* if the MAC is in a BaseX mode, the MAC will also be requested to restart
* negotiation.
*
* Returns zero on success, or negative error code.
*/
int phylink_ethtool_nway_reset(struct phylink *pl)
{
int ret = 0;
ASSERT_RTNL();
if (pl->phydev)
ret = phy_restart_aneg(pl->phydev);
phylink_mac_pcs_an_restart(pl);
return ret;
}
EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);
/**
* phylink_ethtool_get_pauseparam() - get the current pause parameters
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @pause: a pointer to a &struct ethtool_pauseparam
*/
void phylink_ethtool_get_pauseparam(struct phylink *pl,
struct ethtool_pauseparam *pause)
{
ASSERT_RTNL();
pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN);
pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX);
pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX);
}
EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);
/**
* phylink_ethtool_set_pauseparam() - set the current pause parameters
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @pause: a pointer to a &struct ethtool_pauseparam
*/
int phylink_ethtool_set_pauseparam(struct phylink *pl,
struct ethtool_pauseparam *pause)
{
struct phylink_link_state *config = &pl->link_config;
bool manual_changed;
int pause_state;
ASSERT_RTNL();
if (pl->cur_link_an_mode == MLO_AN_FIXED)
return -EOPNOTSUPP;
if (!phylink_test(pl->supported, Pause) &&
!phylink_test(pl->supported, Asym_Pause))
return -EOPNOTSUPP;
if (!phylink_test(pl->supported, Asym_Pause) &&
pause->rx_pause != pause->tx_pause)
return -EINVAL;
pause_state = 0;
if (pause->autoneg)
pause_state |= MLO_PAUSE_AN;
if (pause->rx_pause)
pause_state |= MLO_PAUSE_RX;
if (pause->tx_pause)
pause_state |= MLO_PAUSE_TX;
mutex_lock(&pl->state_mutex);
/*
* See the comments for linkmode_set_pause(), wrt the deficiencies
* with the current implementation. A solution to this issue would
* be:
* ethtool Local device
* rx tx Pause AsymDir
* 0 0 0 0
* 1 0 1 1
* 0 1 0 1
* 1 1 1 1
* and then use the ethtool rx/tx enablement status to mask the
* rx/tx pause resolution.
*/
linkmode_set_pause(config->advertising, pause->tx_pause,
pause->rx_pause);
manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN ||
(!(pause_state & MLO_PAUSE_AN) &&
(config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK);
config->pause = pause_state;
/* Update our in-band advertisement, triggering a renegotiation if
* the advertisement changed.
*/
if (!pl->phydev)
phylink_change_inband_advert(pl);
mutex_unlock(&pl->state_mutex);
/* If we have a PHY, a change of the pause frame advertisement will
* cause phylib to renegotiate (if AN is enabled) which will in turn
* call our phylink_phy_change() and trigger a resolve. Note that
* we can't hold our state mutex while calling phy_set_asym_pause().
*/
if (pl->phydev)
phy_set_asym_pause(pl->phydev, pause->rx_pause,
pause->tx_pause);
/* If the manual pause settings changed, make sure we trigger a
* resolve to update their state; we can not guarantee that the
* link will cycle.
*/
if (manual_changed) {
pl->mac_link_dropped = true;
phylink_run_resolve(pl);
}
return 0;
}
EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
/**
* phylink_get_eee_err() - read the energy efficient ethernet error
* counter
* @pl: a pointer to a &struct phylink returned from phylink_create().
*
* Read the Energy Efficient Ethernet error counter from the PHY associated
* with the phylink instance specified by @pl.
*
* Returns positive error counter value, or negative error code.
*/
int phylink_get_eee_err(struct phylink *pl)
{
int ret = 0;
ASSERT_RTNL();
if (pl->phydev)
ret = phy_get_eee_err(pl->phydev);
return ret;
}
EXPORT_SYMBOL_GPL(phylink_get_eee_err);
/**
* phylink_init_eee() - init and check the EEE features
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @clk_stop_enable: allow PHY to stop receive clock
*
* Must be called either with RTNL held or within mac_link_up()
*/
int phylink_init_eee(struct phylink *pl, bool clk_stop_enable)
{
int ret = -EOPNOTSUPP;
if (pl->phydev)
ret = phy_init_eee(pl->phydev, clk_stop_enable);
return ret;
}
EXPORT_SYMBOL_GPL(phylink_init_eee);
/**
* phylink_ethtool_get_eee() - read the energy efficient ethernet parameters
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @eee: a pointer to a &struct ethtool_eee for the read parameters
*/
int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee)
{
int ret = -EOPNOTSUPP;
ASSERT_RTNL();
if (pl->phydev)
ret = phy_ethtool_get_eee(pl->phydev, eee);
return ret;
}
EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);
/**
* phylink_ethtool_set_eee() - set the energy efficient ethernet parameters
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @eee: a pointer to a &struct ethtool_eee for the desired parameters
*/
int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee)
{
int ret = -EOPNOTSUPP;
ASSERT_RTNL();
if (pl->phydev)
ret = phy_ethtool_set_eee(pl->phydev, eee);
return ret;
}
EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee);
/* This emulates MII registers for a fixed-mode phy operating as per the
* passed in state. "aneg" defines if we report negotiation is possible.
*
* FIXME: should deal with negotiation state too.
*/
static int phylink_mii_emul_read(unsigned int reg,
struct phylink_link_state *state)
{
struct fixed_phy_status fs;
unsigned long *lpa = state->lp_advertising;
int val;
fs.link = state->link;
fs.speed = state->speed;
fs.duplex = state->duplex;
fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa);
fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa);
val = swphy_read_reg(reg, &fs);
if (reg == MII_BMSR) {
if (!state->an_complete)
val &= ~BMSR_ANEGCOMPLETE;
}
return val;
}
static int phylink_phy_read(struct phylink *pl, unsigned int phy_id,
unsigned int reg)
{
struct phy_device *phydev = pl->phydev;
int prtad, devad;
if (mdio_phy_id_is_c45(phy_id)) {
prtad = mdio_phy_id_prtad(phy_id);
devad = mdio_phy_id_devad(phy_id);
return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad,
reg);
}
if (phydev->is_c45) {
switch (reg) {
case MII_BMCR:
case MII_BMSR:
case MII_PHYSID1:
case MII_PHYSID2:
devad = __ffs(phydev->c45_ids.mmds_present);
break;
case MII_ADVERTISE:
case MII_LPA:
if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN))
return -EINVAL;
devad = MDIO_MMD_AN;
if (reg == MII_ADVERTISE)
reg = MDIO_AN_ADVERTISE;
else
reg = MDIO_AN_LPA;
break;
default:
return -EINVAL;
}
prtad = phy_id;
return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad,
reg);
}
return mdiobus_read(pl->phydev->mdio.bus, phy_id, reg);
}
static int phylink_phy_write(struct phylink *pl, unsigned int phy_id,
unsigned int reg, unsigned int val)
{
struct phy_device *phydev = pl->phydev;
int prtad, devad;
if (mdio_phy_id_is_c45(phy_id)) {
prtad = mdio_phy_id_prtad(phy_id);
devad = mdio_phy_id_devad(phy_id);
return mdiobus_c45_write(pl->phydev->mdio.bus, prtad, devad,
reg, val);
}
if (phydev->is_c45) {
switch (reg) {
case MII_BMCR:
case MII_BMSR:
case MII_PHYSID1:
case MII_PHYSID2:
devad = __ffs(phydev->c45_ids.mmds_present);
break;
case MII_ADVERTISE:
case MII_LPA:
if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN))
return -EINVAL;
devad = MDIO_MMD_AN;
if (reg == MII_ADVERTISE)
reg = MDIO_AN_ADVERTISE;
else
reg = MDIO_AN_LPA;
break;
default:
return -EINVAL;
}
return mdiobus_c45_write(pl->phydev->mdio.bus, phy_id, devad,
reg, val);
}
return mdiobus_write(phydev->mdio.bus, phy_id, reg, val);
}
static int phylink_mii_read(struct phylink *pl, unsigned int phy_id,
unsigned int reg)
{
struct phylink_link_state state;
int val = 0xffff;
switch (pl->cur_link_an_mode) {
case MLO_AN_FIXED:
if (phy_id == 0) {
phylink_get_fixed_state(pl, &state);
val = phylink_mii_emul_read(reg, &state);
}
break;
case MLO_AN_PHY:
return -EOPNOTSUPP;
case MLO_AN_INBAND:
if (phy_id == 0) {
phylink_mac_pcs_get_state(pl, &state);
val = phylink_mii_emul_read(reg, &state);
}
break;
}
return val & 0xffff;
}
static int phylink_mii_write(struct phylink *pl, unsigned int phy_id,
unsigned int reg, unsigned int val)
{
switch (pl->cur_link_an_mode) {
case MLO_AN_FIXED:
break;
case MLO_AN_PHY:
return -EOPNOTSUPP;
case MLO_AN_INBAND:
break;
}
return 0;
}
/**
* phylink_mii_ioctl() - generic mii ioctl interface
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @ifr: a pointer to a &struct ifreq for socket ioctls
* @cmd: ioctl cmd to execute
*
* Perform the specified MII ioctl on the PHY attached to the phylink instance
* specified by @pl. If no PHY is attached, emulate the presence of the PHY.
*
* Returns: zero on success or negative error code.
*
* %SIOCGMIIPHY:
* read register from the current PHY.
* %SIOCGMIIREG:
* read register from the specified PHY.
* %SIOCSMIIREG:
* set a register on the specified PHY.
*/
int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
{
struct mii_ioctl_data *mii = if_mii(ifr);
int ret;
ASSERT_RTNL();
if (pl->phydev) {
/* PHYs only exist for MLO_AN_PHY and SGMII */
switch (cmd) {
case SIOCGMIIPHY:
mii->phy_id = pl->phydev->mdio.addr;
fallthrough;
case SIOCGMIIREG:
ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num);
if (ret >= 0) {
mii->val_out = ret;
ret = 0;
}
break;
case SIOCSMIIREG:
ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num,
mii->val_in);
break;
default:
ret = phy_mii_ioctl(pl->phydev, ifr, cmd);
break;
}
} else {
switch (cmd) {
case SIOCGMIIPHY:
mii->phy_id = 0;
fallthrough;
case SIOCGMIIREG:
ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num);
if (ret >= 0) {
mii->val_out = ret;
ret = 0;
}
break;
case SIOCSMIIREG:
ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num,
mii->val_in);
break;
default:
ret = -EOPNOTSUPP;
break;
}
}
return ret;
}
EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
/**
* phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both
* link partners
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @sync: perform action synchronously
*
* If we have a PHY that is not part of a SFP module, then set the speed
* as described in the phy_speed_down() function. Please see this function
* for a description of the @sync parameter.
*
* Returns zero if there is no PHY, otherwise as per phy_speed_down().
*/
int phylink_speed_down(struct phylink *pl, bool sync)
{
int ret = 0;
ASSERT_RTNL();
if (!pl->sfp_bus && pl->phydev)
ret = phy_speed_down(pl->phydev, sync);
return ret;
}
EXPORT_SYMBOL_GPL(phylink_speed_down);
/**
* phylink_speed_up() - restore the advertised speeds prior to the call to
* phylink_speed_down()
* @pl: a pointer to a &struct phylink returned from phylink_create()
*
* If we have a PHY that is not part of a SFP module, then restore the
* PHY speeds as per phy_speed_up().
*
* Returns zero if there is no PHY, otherwise as per phy_speed_up().
*/
int phylink_speed_up(struct phylink *pl)
{
int ret = 0;
ASSERT_RTNL();
if (!pl->sfp_bus && pl->phydev)
ret = phy_speed_up(pl->phydev);
return ret;
}
EXPORT_SYMBOL_GPL(phylink_speed_up);
static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus)
{
struct phylink *pl = upstream;
pl->netdev->sfp_bus = bus;
}
static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus)
{
struct phylink *pl = upstream;
pl->netdev->sfp_bus = NULL;
}
static const phy_interface_t phylink_sfp_interface_preference[] = {
PHY_INTERFACE_MODE_25GBASER,
PHY_INTERFACE_MODE_USXGMII,
PHY_INTERFACE_MODE_10GBASER,
PHY_INTERFACE_MODE_5GBASER,
PHY_INTERFACE_MODE_2500BASEX,
PHY_INTERFACE_MODE_SGMII,
PHY_INTERFACE_MODE_1000BASEX,
PHY_INTERFACE_MODE_100BASEX,
};
static DECLARE_PHY_INTERFACE_MASK(phylink_sfp_interfaces);
static phy_interface_t phylink_choose_sfp_interface(struct phylink *pl,
const unsigned long *intf)
{
phy_interface_t interface;
size_t i;
interface = PHY_INTERFACE_MODE_NA;
for (i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); i++)
if (test_bit(phylink_sfp_interface_preference[i], intf)) {
interface = phylink_sfp_interface_preference[i];
break;
}
return interface;
}
static void phylink_sfp_set_config(struct phylink *pl, u8 mode,
unsigned long *supported,
struct phylink_link_state *state)
{
bool changed = false;
phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n",
phylink_an_mode_str(mode), phy_modes(state->interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, supported);
if (!linkmode_equal(pl->supported, supported)) {
linkmode_copy(pl->supported, supported);
changed = true;
}
if (!linkmode_equal(pl->link_config.advertising, state->advertising)) {
linkmode_copy(pl->link_config.advertising, state->advertising);
changed = true;
}
if (pl->cur_link_an_mode != mode ||
pl->link_config.interface != state->interface) {
pl->cur_link_an_mode = mode;
pl->link_config.interface = state->interface;
changed = true;
phylink_info(pl, "switched to %s/%s link mode\n",
phylink_an_mode_str(mode),
phy_modes(state->interface));
}
if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
&pl->phylink_disable_state))
phylink_mac_initial_config(pl, false);
}
static int phylink_sfp_config_phy(struct phylink *pl, u8 mode,
struct phy_device *phy)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(support1);
__ETHTOOL_DECLARE_LINK_MODE_MASK(support);
struct phylink_link_state config;
phy_interface_t iface;
int ret;
linkmode_copy(support, phy->supported);
memset(&config, 0, sizeof(config));
linkmode_copy(config.advertising, phy->advertising);
config.interface = PHY_INTERFACE_MODE_NA;
config.speed = SPEED_UNKNOWN;
config.duplex = DUPLEX_UNKNOWN;
config.pause = MLO_PAUSE_AN;
config.an_enabled = pl->link_config.an_enabled;
/* Ignore errors if we're expecting a PHY to attach later */
ret = phylink_validate(pl, support, &config);
if (ret) {
phylink_err(pl, "validation with support %*pb failed: %pe\n",
__ETHTOOL_LINK_MODE_MASK_NBITS, support,
ERR_PTR(ret));
return ret;
}
iface = sfp_select_interface(pl->sfp_bus, config.advertising);
if (iface == PHY_INTERFACE_MODE_NA) {
phylink_err(pl,
"selection of interface failed, advertisement %*pb\n",
__ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising);
return -EINVAL;
}
config.interface = iface;
linkmode_copy(support1, support);
ret = phylink_validate(pl, support1, &config);
if (ret) {
phylink_err(pl,
"validation of %s/%s with support %*pb failed: %pe\n",
phylink_an_mode_str(mode),
phy_modes(config.interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, support,
ERR_PTR(ret));
return ret;
}
pl->link_port = pl->sfp_port;
phylink_sfp_set_config(pl, mode, support, &config);
return 0;
}
static int phylink_sfp_config_optical(struct phylink *pl)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(support);
DECLARE_PHY_INTERFACE_MASK(interfaces);
struct phylink_link_state config;
phy_interface_t interface;
int ret;
phylink_dbg(pl, "optical SFP: interfaces=[mac=%*pbl, sfp=%*pbl]\n",
(int)PHY_INTERFACE_MODE_MAX,
pl->config->supported_interfaces,
(int)PHY_INTERFACE_MODE_MAX,
pl->sfp_interfaces);
/* Find the union of the supported interfaces by the PCS/MAC and
* the SFP module.
*/
phy_interface_and(interfaces, pl->config->supported_interfaces,
pl->sfp_interfaces);
if (phy_interface_empty(interfaces)) {
phylink_err(pl, "unsupported SFP module: no common interface modes\n");
return -EINVAL;
}
memset(&config, 0, sizeof(config));
linkmode_copy(support, pl->sfp_support);
linkmode_copy(config.advertising, pl->sfp_support);
config.speed = SPEED_UNKNOWN;
config.duplex = DUPLEX_UNKNOWN;
config.pause = MLO_PAUSE_AN;
config.an_enabled = true;
/* For all the interfaces that are supported, reduce the sfp_support
* mask to only those link modes that can be supported.
*/
ret = phylink_validate_mask(pl, pl->sfp_support, &config, interfaces);
if (ret) {
phylink_err(pl, "unsupported SFP module: validation with support %*pb failed\n",
__ETHTOOL_LINK_MODE_MASK_NBITS, support);
return ret;
}
interface = phylink_choose_sfp_interface(pl, interfaces);
if (interface == PHY_INTERFACE_MODE_NA) {
phylink_err(pl, "failed to select SFP interface\n");
return -EINVAL;
}
phylink_dbg(pl, "optical SFP: chosen %s interface\n",
phy_modes(interface));
config.interface = interface;
/* Ignore errors if we're expecting a PHY to attach later */
ret = phylink_validate(pl, support, &config);
if (ret) {
phylink_err(pl, "validation with support %*pb failed: %pe\n",
__ETHTOOL_LINK_MODE_MASK_NBITS, support,
ERR_PTR(ret));
return ret;
}
pl->link_port = pl->sfp_port;
phylink_sfp_set_config(pl, MLO_AN_INBAND, pl->sfp_support, &config);
return 0;
}
static int phylink_sfp_module_insert(void *upstream,
const struct sfp_eeprom_id *id)
{
struct phylink *pl = upstream;
ASSERT_RTNL();
linkmode_zero(pl->sfp_support);
phy_interface_zero(pl->sfp_interfaces);
sfp_parse_support(pl->sfp_bus, id, pl->sfp_support, pl->sfp_interfaces);
pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, pl->sfp_support);
/* If this module may have a PHY connecting later, defer until later */
pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id);
if (pl->sfp_may_have_phy)
return 0;
return phylink_sfp_config_optical(pl);
}
static int phylink_sfp_module_start(void *upstream)
{
struct phylink *pl = upstream;
/* If this SFP module has a PHY, start the PHY now. */
if (pl->phydev) {
phy_start(pl->phydev);
return 0;
}
/* If the module may have a PHY but we didn't detect one we
* need to configure the MAC here.
*/
if (!pl->sfp_may_have_phy)
return 0;
return phylink_sfp_config_optical(pl);
}
static void phylink_sfp_module_stop(void *upstream)
{
struct phylink *pl = upstream;
/* If this SFP module has a PHY, stop it. */
if (pl->phydev)
phy_stop(pl->phydev);
}
static void phylink_sfp_link_down(void *upstream)
{
struct phylink *pl = upstream;
ASSERT_RTNL();
phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK);
}
static void phylink_sfp_link_up(void *upstream)
{
struct phylink *pl = upstream;
ASSERT_RTNL();
phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_LINK);
}
/* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII
* or 802.3z control word, so inband will not work.
*/
static bool phylink_phy_no_inband(struct phy_device *phy)
{
return phy->is_c45 &&
(phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150;
}
static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
{
struct phylink *pl = upstream;
phy_interface_t interface;
u8 mode;
int ret;
/*
* This is the new way of dealing with flow control for PHYs,
* as described by Timur Tabi in commit 529ed1275263 ("net: phy:
* phy drivers should not set SUPPORTED_[Asym_]Pause") except
* using our validate call to the MAC, we rely upon the MAC
* clearing the bits from both supported and advertising fields.
*/
phy_support_asym_pause(phy);
if (phylink_phy_no_inband(phy))
mode = MLO_AN_PHY;
else
mode = MLO_AN_INBAND;
/* Set the PHY's host supported interfaces */
phy_interface_and(phy->host_interfaces, phylink_sfp_interfaces,
pl->config->supported_interfaces);
/* Do the initial configuration */
ret = phylink_sfp_config_phy(pl, mode, phy);
if (ret < 0)
return ret;
interface = pl->link_config.interface;
ret = phylink_attach_phy(pl, phy, interface);
if (ret < 0)
return ret;
ret = phylink_bringup_phy(pl, phy, interface);
if (ret)
phy_detach(phy);
return ret;
}
static void phylink_sfp_disconnect_phy(void *upstream)
{
phylink_disconnect_phy(upstream);
}
static const struct sfp_upstream_ops sfp_phylink_ops = {
.attach = phylink_sfp_attach,
.detach = phylink_sfp_detach,
.module_insert = phylink_sfp_module_insert,
.module_start = phylink_sfp_module_start,
.module_stop = phylink_sfp_module_stop,
.link_up = phylink_sfp_link_up,
.link_down = phylink_sfp_link_down,
.connect_phy = phylink_sfp_connect_phy,
.disconnect_phy = phylink_sfp_disconnect_phy,
};
/* Helpers for MAC drivers */
static void phylink_decode_c37_word(struct phylink_link_state *state,
uint16_t config_reg, int speed)
{
bool tx_pause, rx_pause;
int fd_bit;
if (speed == SPEED_2500)
fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT;
else
fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT;
mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit);
if (linkmode_test_bit(fd_bit, state->advertising) &&
linkmode_test_bit(fd_bit, state->lp_advertising)) {
state->speed = speed;
state->duplex = DUPLEX_FULL;
} else {
/* negotiation failure */
state->link = false;
}
linkmode_resolve_pause(state->advertising, state->lp_advertising,
&tx_pause, &rx_pause);
if (tx_pause)
state->pause |= MLO_PAUSE_TX;
if (rx_pause)
state->pause |= MLO_PAUSE_RX;
}
static void phylink_decode_sgmii_word(struct phylink_link_state *state,
uint16_t config_reg)
{
if (!(config_reg & LPA_SGMII_LINK)) {
state->link = false;
return;
}
switch (config_reg & LPA_SGMII_SPD_MASK) {
case LPA_SGMII_10:
state->speed = SPEED_10;
break;
case LPA_SGMII_100:
state->speed = SPEED_100;
break;
case LPA_SGMII_1000:
state->speed = SPEED_1000;
break;
default:
state->link = false;
return;
}
if (config_reg & LPA_SGMII_FULL_DUPLEX)
state->duplex = DUPLEX_FULL;
else
state->duplex = DUPLEX_HALF;
}
/**
* phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS
* @state: a pointer to a struct phylink_link_state.
* @lpa: a 16 bit value which stores the USXGMII auto-negotiation word
*
* Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation
* code word. Decode the USXGMII code word and populate the corresponding fields
* (speed, duplex) into the phylink_link_state structure.
*/
void phylink_decode_usxgmii_word(struct phylink_link_state *state,
uint16_t lpa)
{
switch (lpa & MDIO_USXGMII_SPD_MASK) {
case MDIO_USXGMII_10:
state->speed = SPEED_10;
break;
case MDIO_USXGMII_100:
state->speed = SPEED_100;
break;
case MDIO_USXGMII_1000:
state->speed = SPEED_1000;
break;
case MDIO_USXGMII_2500:
state->speed = SPEED_2500;
break;
case MDIO_USXGMII_5000:
state->speed = SPEED_5000;
break;
case MDIO_USXGMII_10G:
state->speed = SPEED_10000;
break;
default:
state->link = false;
return;
}
if (lpa & MDIO_USXGMII_FULL_DUPLEX)
state->duplex = DUPLEX_FULL;
else
state->duplex = DUPLEX_HALF;
}
EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word);
/**
* phylink_decode_usgmii_word() - decode the USGMII word from a MAC PCS
* @state: a pointer to a struct phylink_link_state.
* @lpa: a 16 bit value which stores the USGMII auto-negotiation word
*
* Helper for MAC PCS supporting the USGMII protocol and the auto-negotiation
* code word. Decode the USGMII code word and populate the corresponding fields
* (speed, duplex) into the phylink_link_state structure. The structure for this
* word is the same as the USXGMII word, except it only supports speeds up to
* 1Gbps.
*/
static void phylink_decode_usgmii_word(struct phylink_link_state *state,
uint16_t lpa)
{
switch (lpa & MDIO_USXGMII_SPD_MASK) {
case MDIO_USXGMII_10:
state->speed = SPEED_10;
break;
case MDIO_USXGMII_100:
state->speed = SPEED_100;
break;
case MDIO_USXGMII_1000:
state->speed = SPEED_1000;
break;
default:
state->link = false;
return;
}
if (lpa & MDIO_USXGMII_FULL_DUPLEX)
state->duplex = DUPLEX_FULL;
else
state->duplex = DUPLEX_HALF;
}
/**
* phylink_mii_c22_pcs_decode_state() - Decode MAC PCS state from MII registers
* @state: a pointer to a &struct phylink_link_state.
* @bmsr: The value of the %MII_BMSR register
* @lpa: The value of the %MII_LPA register
*
* Helper for MAC PCS supporting the 802.3 clause 22 register set for
* clause 37 negotiation and/or SGMII control.
*
* Parse the Clause 37 or Cisco SGMII link partner negotiation word into
* the phylink @state structure. This is suitable to be used for implementing
* the mac_pcs_get_state() member of the struct phylink_mac_ops structure if
* accessing @bmsr and @lpa cannot be done with MDIO directly.
*/
void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state,
u16 bmsr, u16 lpa)
{
state->link = !!(bmsr & BMSR_LSTATUS);
state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE);
/* If there is no link or autonegotiation is disabled, the LP advertisement
* data is not meaningful, so don't go any further.
*/
if (!state->link || !state->an_enabled)
return;
switch (state->interface) {
case PHY_INTERFACE_MODE_1000BASEX:
phylink_decode_c37_word(state, lpa, SPEED_1000);
break;
case PHY_INTERFACE_MODE_2500BASEX:
phylink_decode_c37_word(state, lpa, SPEED_2500);
break;
case PHY_INTERFACE_MODE_SGMII:
case PHY_INTERFACE_MODE_QSGMII:
phylink_decode_sgmii_word(state, lpa);
break;
case PHY_INTERFACE_MODE_QUSGMII:
phylink_decode_usgmii_word(state, lpa);
break;
default:
state->link = false;
break;
}
}
EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_decode_state);
/**
* phylink_mii_c22_pcs_get_state() - read the MAC PCS state
* @pcs: a pointer to a &struct mdio_device.
* @state: a pointer to a &struct phylink_link_state.
*
* Helper for MAC PCS supporting the 802.3 clause 22 register set for
* clause 37 negotiation and/or SGMII control.
*
* Read the MAC PCS state from the MII device configured in @config and
* parse the Clause 37 or Cisco SGMII link partner negotiation word into
* the phylink @state structure. This is suitable to be directly plugged
* into the mac_pcs_get_state() member of the struct phylink_mac_ops
* structure.
*/
void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs,
struct phylink_link_state *state)
{
int bmsr, lpa;
bmsr = mdiodev_read(pcs, MII_BMSR);
lpa = mdiodev_read(pcs, MII_LPA);
if (bmsr < 0 || lpa < 0) {
state->link = false;
return;
}
phylink_mii_c22_pcs_decode_state(state, bmsr, lpa);
}
EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state);
/**
* phylink_mii_c22_pcs_encode_advertisement() - configure the clause 37 PCS
* advertisement
* @interface: the PHY interface mode being configured
* @advertising: the ethtool advertisement mask
*
* Helper for MAC PCS supporting the 802.3 clause 22 register set for
* clause 37 negotiation and/or SGMII control.
*
* Encode the clause 37 PCS advertisement as specified by @interface and
* @advertising.
*
* Return: The new value for @adv, or ``-EINVAL`` if it should not be changed.
*/
int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface,
const unsigned long *advertising)
{
u16 adv;
switch (interface) {
case PHY_INTERFACE_MODE_1000BASEX:
case PHY_INTERFACE_MODE_2500BASEX:
adv = ADVERTISE_1000XFULL;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
advertising))
adv |= ADVERTISE_1000XPAUSE;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
advertising))
adv |= ADVERTISE_1000XPSE_ASYM;
return adv;
case PHY_INTERFACE_MODE_SGMII:
case PHY_INTERFACE_MODE_QSGMII:
return 0x0001;
default:
/* Nothing to do for other modes */
return -EINVAL;
}
}
EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_encode_advertisement);
/**
* phylink_mii_c22_pcs_config() - configure clause 22 PCS
* @pcs: a pointer to a &struct mdio_device.
* @mode: link autonegotiation mode
* @interface: the PHY interface mode being configured
* @advertising: the ethtool advertisement mask
*
* Configure a Clause 22 PCS PHY with the appropriate negotiation
* parameters for the @mode, @interface and @advertising parameters.
* Returns negative error number on failure, zero if the advertisement
* has not changed, or positive if there is a change.
*/
int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode,
phy_interface_t interface,
const unsigned long *advertising)
{
bool changed = 0;
u16 bmcr;
int ret, adv;
adv = phylink_mii_c22_pcs_encode_advertisement(interface, advertising);
if (adv >= 0) {
ret = mdiobus_modify_changed(pcs->bus, pcs->addr,
MII_ADVERTISE, 0xffff, adv);
if (ret < 0)
return ret;
changed = ret;
}
/* Ensure ISOLATE bit is disabled */
if (mode == MLO_AN_INBAND &&
(interface == PHY_INTERFACE_MODE_SGMII ||
interface == PHY_INTERFACE_MODE_QSGMII ||
linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, advertising)))
bmcr = BMCR_ANENABLE;
else
bmcr = 0;
ret = mdiodev_modify(pcs, MII_BMCR, BMCR_ANENABLE | BMCR_ISOLATE, bmcr);
if (ret < 0)
return ret;
return changed;
}
EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config);
/**
* phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation
* @pcs: a pointer to a &struct mdio_device.
*
* Helper for MAC PCS supporting the 802.3 clause 22 register set for
* clause 37 negotiation.
*
* Restart the clause 37 negotiation with the link partner. This is
* suitable to be directly plugged into the mac_pcs_get_state() member
* of the struct phylink_mac_ops structure.
*/
void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs)
{
int val = mdiodev_read(pcs, MII_BMCR);
if (val >= 0) {
val |= BMCR_ANRESTART;
mdiodev_write(pcs, MII_BMCR, val);
}
}
EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart);
void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,
struct phylink_link_state *state)
{
struct mii_bus *bus = pcs->bus;
int addr = pcs->addr;
int stat;
stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1);
if (stat < 0) {
state->link = false;
return;
}
state->link = !!(stat & MDIO_STAT1_LSTATUS);
if (!state->link)
return;
switch (state->interface) {
case PHY_INTERFACE_MODE_10GBASER:
state->speed = SPEED_10000;
state->duplex = DUPLEX_FULL;
break;
default:
break;
}
}
EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state);
static int __init phylink_init(void)
{
for (int i = 0; i < ARRAY_SIZE(phylink_sfp_interface_preference); ++i)
__set_bit(phylink_sfp_interface_preference[i],
phylink_sfp_interfaces);
return 0;
}
module_init(phylink_init);
MODULE_LICENSE("GPL v2");