Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-04 01:51:34 +00:00
Code Issues Packages Projects Releases Wiki Activity
deedad80f6
linux/drivers/net/phy/phylink.c
Russell King (Oracle) df0acdc59b net: phylink: fix ksettings_set() ethtool call 
While testing a Fiberstore SFP-10G-T module (which uses 10GBASE-R with
rate adaption) in a Clearfog platform (which can't do that) it was
found that the PHYs advertisement was not limited according to the
hosts capabilities when using ethtool to change it.

Fix this by ensuring that we mask the advertisement with the computed
support mask as the very first thing we do.

Fixes: cbc1bb1e46 ("net: phylink: simplify phy case for ksettings_set method")
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2023-05-15 10:31:23 +01:00

3524 lines
99 KiB
C
Raw Blame History

// 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_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:
case PHY_INTERFACE_MODE_QUSGMII:
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);
__set_bit(ETHTOOL_LINK_MODE_10baseT1S_Half_BIT, linkmodes);
__set_bit(ETHTOOL_LINK_MODE_10baseT1S_P2MP_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);
__set_bit(ETHTOOL_LINK_MODE_10baseT1S_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_validate_mask_caps() - Restrict link modes based on caps
* @supported: ethtool bitmask for supported link modes.
* @state: pointer to a &struct phylink_link_state.
* @mac_capabilities: bitmask of MAC capabilities
*
* Calculate the supported link modes based on @mac_capabilities, and restrict
* @supported and @state based on that. Use this function if your capabiliies
* aren't constant, such as if they vary depending on the interface.
*/
void phylink_validate_mask_caps(unsigned long *supported,
struct phylink_link_state *state,
unsigned long mac_capabilities)
{
__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, 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_validate_mask_caps);
/**
* 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.
*/
void phylink_generic_validate(struct phylink_config *config,
unsigned long *supported,
struct phylink_link_state *state)
{
phylink_validate_mask_caps(supported, state, config->mac_capabilities);
}
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 */
if (pl->mac_ops->validate)
pl->mac_ops->validate(pl->config, supported, state);
else
phylink_generic_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;
bool pause, asym_pause, autoneg;
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);
pause = phylink_test(pl->supported, Pause);
asym_pause = phylink_test(pl->supported, Asym_Pause);
autoneg = phylink_test(pl->supported, Autoneg);
s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
pl->supported, true);
linkmode_zero(pl->supported);
phylink_set(pl->supported, MII);
if (pause)
phylink_set(pl->supported, Pause);
if (asym_pause)
phylink_set(pl->supported, Asym_Pause);
if (autoneg)
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->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;
}
}
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 (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
state->advertising))
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\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);
pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state);
}
static void phylink_mac_pcs_an_restart(struct phylink *pl)
{
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
pl->link_config.advertising) &&
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->rate_matching = pl->link_config.rate_matching;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
state->advertising)) {
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->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 = linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
state->advertising) ?
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();
/* Mask out unsupported advertisements */
linkmode_and(config.advertising, kset->link_modes.advertising,
pl->supported);
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;
/* 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.
*/
linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising,
kset->base.autoneg == AUTONEG_ENABLE);
/* 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 (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
config.advertising) &&
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;
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;
/* 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;
/* 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_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 || !linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
state->advertising))
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:
case PHY_INTERFACE_MODE_QUSGMII:
phylink_decode_sgmii_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");
Reference in New Issue View Git Blame Copy Permalink