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linux_dsm_epyc7002/drivers/net/phy/phylink.c
Russell King b8679ef8be net: phylink: pcs: add 802.3 clause 45 helpers 
Implement helpers for PCS accessed via the MII bus using 802.3 clause
45 cycles for 10GBASE-R. Only link up/down is supported, 10G full
duplex is assumed.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-17 22:51:16 -07:00

2308 lines
62 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/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,
};
/**
* struct phylink - internal data type for phylink
*/
struct phylink {
/* private: */
struct net_device *netdev;
const struct phylink_mac_ops *ops;
struct phylink_config *config;
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;
struct sfp_bus *sfp_bus;
bool sfp_may_have_phy;
__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";
}
static int phylink_validate(struct phylink *pl, unsigned long *supported,
struct phylink_link_state *state)
{
pl->ops->validate(pl->config, supported, state);
return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
}
static int phylink_parse_fixedlink(struct phylink *pl,
struct fwnode_handle *fwnode)
{
struct fwnode_handle *fixed_node;
const struct phy_setting *s;
struct gpio_desc *desc;
u32 speed;
int ret;
fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link");
if (fixed_node) {
ret = fwnode_property_read_u32(fixed_node, "speed", &speed);
pl->link_config.speed = speed;
pl->link_config.duplex = DUPLEX_HALF;
if (fwnode_property_read_bool(fixed_node, "full-duplex"))
pl->link_config.duplex = DUPLEX_FULL;
/* We treat the "pause" and "asym-pause" terminology as
* defining the link partner's ability. */
if (fwnode_property_read_bool(fixed_node, "pause"))
__set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
pl->link_config.lp_advertising);
if (fwnode_property_read_bool(fixed_node, "asym-pause"))
__set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
pl->link_config.lp_advertising);
if (ret == 0) {
desc = fwnode_gpiod_get_index(fixed_node, "link", 0,
GPIOD_IN, "?");
if (!IS_ERR(desc))
pl->link_gpio = desc;
else if (desc == ERR_PTR(-EPROBE_DEFER))
ret = -EPROBE_DEFER;
}
fwnode_handle_put(fixed_node);
if (ret)
return ret;
} else {
u32 prop[5];
ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
NULL, 0);
if (ret != ARRAY_SIZE(prop)) {
phylink_err(pl, "broken fixed-link?\n");
return -EINVAL;
}
ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
prop, ARRAY_SIZE(prop));
if (!ret) {
pl->link_config.duplex = prop[1] ?
DUPLEX_FULL : DUPLEX_HALF;
pl->link_config.speed = prop[2];
if (prop[3])
__set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
pl->link_config.lp_advertising);
if (prop[4])
__set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
pl->link_config.lp_advertising);
}
}
if (pl->link_config.speed > SPEED_1000 &&
pl->link_config.duplex != DUPLEX_FULL)
phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n",
pl->link_config.speed);
bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
linkmode_copy(pl->link_config.advertising, pl->supported);
phylink_validate(pl, pl->supported, &pl->link_config);
s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
pl->supported, true);
linkmode_zero(pl->supported);
phylink_set(pl->supported, MII);
phylink_set(pl->supported, Pause);
phylink_set(pl->supported, Asym_Pause);
if (s) {
__set_bit(s->bit, pl->supported);
} 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) {
if (pl->cfg_link_an_mode == MLO_AN_FIXED) {
phylink_err(pl,
"can't use both fixed-link and in-band-status\n");
return -EINVAL;
}
linkmode_zero(pl->supported);
phylink_set(pl->supported, MII);
phylink_set(pl->supported, Autoneg);
phylink_set(pl->supported, Asym_Pause);
phylink_set(pl->supported, Pause);
pl->link_config.an_enabled = true;
pl->cfg_link_an_mode = MLO_AN_INBAND;
switch (pl->link_config.interface) {
case PHY_INTERFACE_MODE_SGMII:
case PHY_INTERFACE_MODE_QSGMII:
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_USXGMII:
case PHY_INTERFACE_MODE_10GKR:
case PHY_INTERFACE_MODE_10GBASER:
phylink_set(pl->supported, 10baseT_Half);
phylink_set(pl->supported, 10baseT_Full);
phylink_set(pl->supported, 100baseT_Half);
phylink_set(pl->supported, 100baseT_Full);
phylink_set(pl->supported, 1000baseT_Half);
phylink_set(pl->supported, 1000baseT_Full);
phylink_set(pl->supported, 1000baseX_Full);
phylink_set(pl->supported, 1000baseKX_Full);
phylink_set(pl->supported, 2500baseT_Full);
phylink_set(pl->supported, 2500baseX_Full);
phylink_set(pl->supported, 5000baseT_Full);
phylink_set(pl->supported, 10000baseT_Full);
phylink_set(pl->supported, 10000baseKR_Full);
phylink_set(pl->supported, 10000baseKX4_Full);
phylink_set(pl->supported, 10000baseCR_Full);
phylink_set(pl->supported, 10000baseSR_Full);
phylink_set(pl->supported, 10000baseLR_Full);
phylink_set(pl->supported, 10000baseLRM_Full);
phylink_set(pl->supported, 10000baseER_Full);
break;
case PHY_INTERFACE_MODE_XLGMII:
phylink_set(pl->supported, 25000baseCR_Full);
phylink_set(pl->supported, 25000baseKR_Full);
phylink_set(pl->supported, 25000baseSR_Full);
phylink_set(pl->supported, 40000baseKR4_Full);
phylink_set(pl->supported, 40000baseCR4_Full);
phylink_set(pl->supported, 40000baseSR4_Full);
phylink_set(pl->supported, 40000baseLR4_Full);
phylink_set(pl->supported, 50000baseCR2_Full);
phylink_set(pl->supported, 50000baseKR2_Full);
phylink_set(pl->supported, 50000baseSR2_Full);
phylink_set(pl->supported, 50000baseKR_Full);
phylink_set(pl->supported, 50000baseSR_Full);
phylink_set(pl->supported, 50000baseCR_Full);
phylink_set(pl->supported, 50000baseLR_ER_FR_Full);
phylink_set(pl->supported, 50000baseDR_Full);
phylink_set(pl->supported, 100000baseKR4_Full);
phylink_set(pl->supported, 100000baseSR4_Full);
phylink_set(pl->supported, 100000baseCR4_Full);
phylink_set(pl->supported, 100000baseLR4_ER4_Full);
phylink_set(pl->supported, 100000baseKR2_Full);
phylink_set(pl->supported, 100000baseSR2_Full);
phylink_set(pl->supported, 100000baseCR2_Full);
phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full);
phylink_set(pl->supported, 100000baseDR2_Full);
break;
default:
phylink_err(pl,
"incorrect link mode %s for in-band status\n",
phy_modes(pl->link_config.interface));
return -EINVAL;
}
linkmode_copy(pl->link_config.advertising, pl->supported);
if (phylink_validate(pl, pl->supported, &pl->link_config)) {
phylink_err(pl,
"failed to validate link configuration for in-band status\n");
return -EINVAL;
}
/* Check if MAC/PCS also supports Autoneg. */
pl->link_config.an_enabled = phylink_test(pl->supported, Autoneg);
}
return 0;
}
static void phylink_apply_manual_flow(struct phylink *pl,
struct phylink_link_state *state)
{
/* If autoneg is disabled, pause AN is also disabled */
if (!state->an_enabled)
state->pause &= ~MLO_PAUSE_AN;
/* Manual configuration of pause modes */
if (!(pl->link_config.pause & MLO_PAUSE_AN))
state->pause = pl->link_config.pause;
}
static void phylink_resolve_flow(struct phylink_link_state *state)
{
bool tx_pause, rx_pause;
state->pause = MLO_PAUSE_NONE;
if (state->duplex == DUPLEX_FULL) {
linkmode_resolve_pause(state->advertising,
state->lp_advertising,
&tx_pause, &rx_pause);
if (tx_pause)
state->pause |= MLO_PAUSE_TX;
if (rx_pause)
state->pause |= MLO_PAUSE_RX;
}
}
static void phylink_mac_config(struct phylink *pl,
const struct phylink_link_state *state)
{
phylink_dbg(pl,
"%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
__func__, phylink_an_mode_str(pl->cur_link_an_mode),
phy_modes(state->interface),
phy_speed_to_str(state->speed),
phy_duplex_to_str(state->duplex),
__ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
state->pause, state->link, state->an_enabled);
pl->ops->mac_config(pl->config, pl->cur_link_an_mode, state);
}
static void phylink_mac_config_up(struct phylink *pl,
const struct phylink_link_state *state)
{
if (state->link)
phylink_mac_config(pl, state);
}
static void phylink_mac_an_restart(struct phylink *pl)
{
if (pl->link_config.an_enabled &&
phy_interface_mode_is_8023z(pl->link_config.interface))
pl->ops->mac_an_restart(pl->config);
}
static void phylink_mac_pcs_get_state(struct phylink *pl,
struct phylink_link_state *state)
{
linkmode_copy(state->advertising, pl->link_config.advertising);
linkmode_zero(state->lp_advertising);
state->interface = pl->link_config.interface;
state->an_enabled = pl->link_config.an_enabled;
state->speed = SPEED_UNKNOWN;
state->duplex = DUPLEX_UNKNOWN;
state->pause = MLO_PAUSE_NONE;
state->an_complete = 0;
state->link = 1;
pl->ops->mac_pcs_get_state(pl->config, state);
}
/* 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->get_fixed_state)
pl->get_fixed_state(pl->netdev, 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)
{
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_mac_config(pl, &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_mac_link_up(struct phylink *pl,
struct phylink_link_state link_state)
{
struct net_device *ndev = pl->netdev;
pl->cur_interface = link_state.interface;
pl->ops->mac_link_up(pl->config, pl->phydev,
pl->cur_link_an_mode, pl->cur_interface,
link_state.speed, link_state.duplex,
!!(link_state.pause & MLO_PAUSE_TX),
!!(link_state.pause & MLO_PAUSE_RX));
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_mac_link_down(struct phylink *pl)
{
struct net_device *ndev = pl->netdev;
if (ndev)
netif_carrier_off(ndev);
pl->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;
int link_changed;
mutex_lock(&pl->state_mutex);
if (pl->phylink_disable_state) {
pl->mac_link_dropped = false;
link_state.link = false;
} else if (pl->mac_link_dropped) {
link_state.link = false;
} else {
switch (pl->cur_link_an_mode) {
case MLO_AN_PHY:
link_state = pl->phy_state;
phylink_apply_manual_flow(pl, &link_state);
phylink_mac_config_up(pl, &link_state);
break;
case MLO_AN_FIXED:
phylink_get_fixed_state(pl, &link_state);
phylink_mac_config_up(pl, &link_state);
break;
case MLO_AN_INBAND:
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) {
link_state.interface = pl->phy_state.interface;
/* If we have a PHY, we need to update with
* the PHY flow control bits. */
link_state.pause = pl->phy_state.pause;
phylink_apply_manual_flow(pl, &link_state);
phylink_mac_config(pl, &link_state);
} else {
phylink_apply_manual_flow(pl, &link_state);
}
break;
}
}
if (pl->netdev)
link_changed = (link_state.link != netif_carrier_ok(ndev));
else
link_changed = (link_state.link != pl->old_link_state);
if (link_changed) {
pl->old_link_state = link_state.link;
if (!link_state.link)
phylink_mac_link_down(pl);
else
phylink_mac_link_up(pl, link_state);
}
if (!link_state.link && pl->mac_link_dropped) {
pl->mac_link_dropped = false;
queue_work(system_power_efficient_wq, &pl->resolve);
}
mutex_unlock(&pl->state_mutex);
}
static void phylink_run_resolve(struct phylink *pl)
{
if (!pl->phylink_disable_state)
queue_work(system_power_efficient_wq, &pl->resolve);
}
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_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)) {
ret = PTR_ERR(bus);
phylink_err(pl, "unable to attach SFP bus: %d\n", ret);
return ret;
}
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
* @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 *ops)
{
struct phylink *pl;
int ret;
pl = kzalloc(sizeof(*pl), GFP_KERNEL);
if (!pl)
return ERR_PTR(-ENOMEM);
mutex_init(&pl->state_mutex);
INIT_WORK(&pl->resolve, phylink_resolve);
pl->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->phy_state.interface = iface;
pl->link_interface = iface;
if (iface == PHY_INTERFACE_MODE_MOCA)
pl->link_port = PORT_BNC;
else
pl->link_port = PORT_MII;
pl->link_config.interface = iface;
pl->link_config.pause = MLO_PAUSE_AN;
pl->link_config.speed = SPEED_UNKNOWN;
pl->link_config.duplex = DUPLEX_UNKNOWN;
pl->link_config.an_enabled = true;
pl->ops = 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);
static void phylink_phy_change(struct phy_device *phydev, bool up,
bool do_carrier)
{
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.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\n", up ? "up" : "down",
phy_modes(phydev->interface),
phy_speed_to_str(phydev->speed),
phy_duplex_to_str(phydev->duplex));
}
static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy,
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);
/* Clause 45 PHYs switch their Serdes lane between several different
* modes, normally 10GBASE-R, SGMII. Some use 2500BASE-X for 2.5G
* speeds. We really need to know which interface modes the PHY and
* MAC supports to properly work out which linkmodes can be supported.
*/
if (phy->is_c45 &&
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: %d\n",
phy_modes(config.interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported,
__ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising,
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;
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: setting supported %*pb advertising %*pb\n",
__ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
__ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising);
if (phy_interrupt_is_valid(phy))
phy_request_interrupt(phy);
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))))
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)
{
struct device_node *phy_node;
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_node = of_parse_phandle(dn, "phy-handle", 0);
if (!phy_node)
phy_node = of_parse_phandle(dn, "phy", 0);
if (!phy_node)
phy_node = of_parse_phandle(dn, "phy-device", 0);
if (!phy_node) {
if (pl->cfg_link_an_mode == MLO_AN_PHY)
return -ENODEV;
return 0;
}
phy_dev = of_phy_find_device(phy_node);
/* We're done with the phy_node handle */
of_node_put(phy_node);
if (!phy_dev)
return -ENODEV;
ret = phy_attach_direct(pl->netdev, phy_dev, flags,
pl->link_interface);
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_of_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_fixed_state_cb() - allow setting a fixed link callback
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @cb: callback to execute to determine the fixed link state.
*
* The MAC driver should call this driver when the state of its link
* can be determined through e.g: an out of band MMIO register.
*/
int phylink_fixed_state_cb(struct phylink *pl,
void (*cb)(struct net_device *dev,
struct phylink_link_state *state))
{
/* It does not make sense to let the link be overriden unless we use
* MLO_AN_FIXED
*/
if (pl->cfg_link_an_mode != MLO_AN_FIXED)
return -EINVAL;
mutex_lock(&pl->state_mutex);
pl->get_fixed_state = cb;
mutex_unlock(&pl->state_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(phylink_fixed_state_cb);
/**
* 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)
{
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.
*/
phylink_mac_initial_config(pl);
/* 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_an_restart(pl);
clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
phylink_run_resolve(pl);
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)
mod_timer(&pl->link_poll, jiffies + HZ);
}
if ((pl->cfg_link_an_mode == MLO_AN_FIXED && pl->get_fixed_state) ||
pl->config->pcs_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.
*/
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_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);
kset->base.speed = state->speed;
kset->base.duplex = state->duplex;
kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE :
AUTONEG_DISABLE;
}
/**
* phylink_ethtool_ksettings_get() - get the current link settings
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings
*
* Read the current link settings for the phylink instance specified by @pl.
* This will be the link settings read from the MAC, PHY or fixed link
* settings depending on the current negotiation mode.
*/
int phylink_ethtool_ksettings_get(struct phylink *pl,
struct ethtool_link_ksettings *kset)
{
struct phylink_link_state link_state;
ASSERT_RTNL();
if (pl->phydev) {
phy_ethtool_ksettings_get(pl->phydev, kset);
} else {
kset->base.port = pl->link_port;
}
linkmode_copy(kset->link_modes.supported, pl->supported);
switch (pl->cur_link_an_mode) {
case MLO_AN_FIXED:
/* We are using fixed settings. Report these as the
* current link settings - and note that these also
* represent the supported speeds/duplex/pause modes.
*/
phylink_get_fixed_state(pl, &link_state);
phylink_get_ksettings(&link_state, kset);
break;
case MLO_AN_INBAND:
/* If there is a phy attached, then use the reported
* settings from the phy with no modification.
*/
if (pl->phydev)
break;
phylink_mac_pcs_get_state(pl, &link_state);
/* The MAC is reporting the link results from its own PCS
* layer via in-band status. Report these as the current
* link settings.
*/
phylink_get_ksettings(&link_state, kset);
break;
}
return 0;
}
EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get);
/**
* phylink_ethtool_ksettings_set() - set the link settings
* @pl: a pointer to a &struct phylink returned from phylink_create()
* @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes
*/
int phylink_ethtool_ksettings_set(struct phylink *pl,
const struct ethtool_link_ksettings *kset)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(support);
struct ethtool_link_ksettings our_kset;
struct phylink_link_state config;
int ret;
ASSERT_RTNL();
if (kset->base.autoneg != AUTONEG_DISABLE &&
kset->base.autoneg != AUTONEG_ENABLE)
return -EINVAL;
linkmode_copy(support, pl->supported);
config = pl->link_config;
/* Mask out unsupported advertisements */
linkmode_and(config.advertising, kset->link_modes.advertising,
support);
/* FIXME: should we reject autoneg if phy/mac does not support it? */
if (kset->base.autoneg == AUTONEG_DISABLE) {
const struct phy_setting *s;
/* Autonegotiation disabled, select a suitable speed and
* duplex.
*/
s = phy_lookup_setting(kset->base.speed, kset->base.duplex,
support, false);
if (!s)
return -EINVAL;
/* If we have a fixed link (as specified by firmware), refuse
* to change link parameters.
*/
if (pl->cur_link_an_mode == MLO_AN_FIXED &&
(s->speed != pl->link_config.speed ||
s->duplex != pl->link_config.duplex))
return -EINVAL;
config.speed = s->speed;
config.duplex = s->duplex;
config.an_enabled = false;
__clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
} else {
/* If we have a fixed link, refuse to enable autonegotiation */
if (pl->cur_link_an_mode == MLO_AN_FIXED)
return -EINVAL;
config.speed = SPEED_UNKNOWN;
config.duplex = DUPLEX_UNKNOWN;
config.an_enabled = true;
__set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
}
if (pl->phydev) {
/* If we have a PHY, we process the kset change via phylib.
* phylib will call our link state function if the PHY
* parameters have changed, which will trigger a resolve
* and update the MAC configuration.
*/
our_kset = *kset;
linkmode_copy(our_kset.link_modes.advertising,
config.advertising);
our_kset.base.speed = config.speed;
our_kset.base.duplex = config.duplex;
ret = phy_ethtool_ksettings_set(pl->phydev, &our_kset);
if (ret)
return ret;
mutex_lock(&pl->state_mutex);
/* Save the new configuration */
linkmode_copy(pl->link_config.advertising,
our_kset.link_modes.advertising);
pl->link_config.interface = config.interface;
pl->link_config.speed = our_kset.base.speed;
pl->link_config.duplex = our_kset.base.duplex;
pl->link_config.an_enabled = our_kset.base.autoneg !=
AUTONEG_DISABLE;
mutex_unlock(&pl->state_mutex);
} else {
/* For a fixed link, this isn't able to change any parameters,
* which just leaves inband mode.
*/
if (phylink_validate(pl, support, &config))
return -EINVAL;
/* If autonegotiation is enabled, we must have an advertisement */
if (config.an_enabled &&
phylink_is_empty_linkmode(config.advertising))
return -EINVAL;
mutex_lock(&pl->state_mutex);
linkmode_copy(pl->link_config.advertising, config.advertising);
pl->link_config.interface = config.interface;
pl->link_config.speed = config.speed;
pl->link_config.duplex = config.duplex;
pl->link_config.an_enabled = kset->base.autoneg !=
AUTONEG_DISABLE;
if (pl->cur_link_an_mode == MLO_AN_INBAND &&
!test_bit(PHYLINK_DISABLE_STOPPED,
&pl->phylink_disable_state)) {
/* If in 802.3z mode, this updates the advertisement.
*
* If we are in SGMII mode without a PHY, there is no
* advertisement; the only thing we have is the pause
* modes which can only come from a PHY.
*/
phylink_mac_config(pl, &pl->link_config);
phylink_mac_an_restart(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_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;
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->autoneg && pause->rx_pause != pause->tx_pause)
return -EINVAL;
mutex_lock(&pl->state_mutex);
config->pause = 0;
if (pause->autoneg)
config->pause |= MLO_PAUSE_AN;
if (pause->rx_pause)
config->pause |= MLO_PAUSE_RX;
if (pause->tx_pause)
config->pause |= MLO_PAUSE_TX;
/*
* 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);
/* If we have a PHY, phylib will call our link state function if the
* mode has changed, which will trigger a resolve and update the MAC
* configuration.
*/
if (pl->phydev) {
phy_set_asym_pause(pl->phydev, pause->rx_pause,
pause->tx_pause);
} else if (!test_bit(PHYLINK_DISABLE_STOPPED,
&pl->phylink_disable_state)) {
phylink_mac_config(pl, &pl->link_config);
phylink_mac_an_restart(pl);
}
mutex_unlock(&pl->state_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
/**
* phylink_ethtool_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);
devad = MII_ADDR_C45 | devad << 16 | reg;
} else if (phydev->is_c45) {
switch (reg) {
case MII_BMCR:
case MII_BMSR:
case MII_PHYSID1:
case MII_PHYSID2:
devad = __ffs(phydev->c45_ids.devices_in_package);
break;
case MII_ADVERTISE:
case MII_LPA:
if (!(phydev->c45_ids.devices_in_package & 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;
devad = MII_ADDR_C45 | devad << 16 | reg;
} else {
prtad = phy_id;
devad = reg;
}
return mdiobus_read(pl->phydev->mdio.bus, prtad, devad);
}
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);
devad = MII_ADDR_C45 | devad << 16 | reg;
} else if (phydev->is_c45) {
switch (reg) {
case MII_BMCR:
case MII_BMSR:
case MII_PHYSID1:
case MII_PHYSID2:
devad = __ffs(phydev->c45_ids.devices_in_package);
break;
case MII_ADVERTISE:
case MII_LPA:
if (!(phydev->c45_ids.devices_in_package & 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;
devad = MII_ADDR_C45 | devad << 16 | reg;
} else {
prtad = phy_id;
devad = reg;
}
return mdiobus_write(phydev->mdio.bus, prtad, devad, 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;
/* fall through */
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;
/* fall through */
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);
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 int phylink_sfp_config(struct phylink *pl, u8 mode,
const unsigned long *supported,
const unsigned long *advertising)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(support1);
__ETHTOOL_DECLARE_LINK_MODE_MASK(support);
struct phylink_link_state config;
phy_interface_t iface;
bool changed;
int ret;
linkmode_copy(support, supported);
memset(&config, 0, sizeof(config));
linkmode_copy(config.advertising, advertising);
config.interface = PHY_INTERFACE_MODE_NA;
config.speed = SPEED_UNKNOWN;
config.duplex = DUPLEX_UNKNOWN;
config.pause = MLO_PAUSE_AN;
config.an_enabled = pl->link_config.an_enabled;
/* Ignore errors if we're expecting a PHY to attach later */
ret = phylink_validate(pl, support, &config);
if (ret) {
phylink_err(pl, "validation with support %*pb failed: %d\n",
__ETHTOOL_LINK_MODE_MASK_NBITS, support, 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: %d\n",
phylink_an_mode_str(mode),
phy_modes(config.interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
return ret;
}
phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n",
phylink_an_mode_str(mode), phy_modes(config.interface),
__ETHTOOL_LINK_MODE_MASK_NBITS, support);
if (phy_interface_mode_is_8023z(iface) && pl->phydev)
return -EINVAL;
changed = !linkmode_equal(pl->supported, support);
if (changed) {
linkmode_copy(pl->supported, support);
linkmode_copy(pl->link_config.advertising, config.advertising);
}
if (pl->cur_link_an_mode != mode ||
pl->link_config.interface != config.interface) {
pl->link_config.interface = config.interface;
pl->cur_link_an_mode = mode;
changed = true;
phylink_info(pl, "switched to %s/%s link mode\n",
phylink_an_mode_str(mode),
phy_modes(config.interface));
}
pl->link_port = pl->sfp_port;
if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
&pl->phylink_disable_state))
phylink_mac_initial_config(pl);
return ret;
}
static int phylink_sfp_module_insert(void *upstream,
const struct sfp_eeprom_id *id)
{
struct phylink *pl = upstream;
unsigned long *support = pl->sfp_support;
ASSERT_RTNL();
linkmode_zero(support);
sfp_parse_support(pl->sfp_bus, id, support);
pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, 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(pl, MLO_AN_INBAND, support, support);
}
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(pl, MLO_AN_INBAND,
pl->sfp_support, pl->sfp_support);
}
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();
clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
phylink_run_resolve(pl);
}
/* 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;
/* Do the initial configuration */
ret = phylink_sfp_config(pl, mode, phy->supported, phy->advertising);
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 */
/**
* phylink_helper_basex_speed() - 1000BaseX/2500BaseX helper
* @state: a pointer to a &struct phylink_link_state
*
* Inspect the interface mode, advertising mask or forced speed and
* decide whether to run at 2.5Gbit or 1Gbit appropriately, switching
* the interface mode to suit. @state->interface is appropriately
* updated, and the advertising mask has the "other" baseX_Full flag
* cleared.
*/
void phylink_helper_basex_speed(struct phylink_link_state *state)
{
if (phy_interface_mode_is_8023z(state->interface)) {
bool want_2500 = state->an_enabled ?
phylink_test(state->advertising, 2500baseX_Full) :
state->speed == SPEED_2500;
if (want_2500) {
phylink_clear(state->advertising, 1000baseX_Full);
state->interface = PHY_INTERFACE_MODE_2500BASEX;
} else {
phylink_clear(state->advertising, 2500baseX_Full);
state->interface = PHY_INTERFACE_MODE_1000BASEX;
}
}
}
EXPORT_SYMBOL_GPL(phylink_helper_basex_speed);
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_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)
{
struct mii_bus *bus = pcs->bus;
int addr = pcs->addr;
int bmsr, lpa;
bmsr = mdiobus_read(bus, addr, MII_BMSR);
lpa = mdiobus_read(bus, addr, MII_LPA);
if (bmsr < 0 || lpa < 0) {
state->link = false;
return;
}
state->link = !!(bmsr & BMSR_LSTATUS);
state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE);
if (!state->link)
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:
phylink_decode_sgmii_word(state, lpa);
break;
default:
state->link = false;
break;
}
}
EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state);
/**
* phylink_mii_c22_pcs_set_advertisement() - configure the clause 37 PCS
* advertisement
* @pcs: a pointer to a &struct mdio_device.
* @state: a pointer to the state being configured.
*
* Helper for MAC PCS supporting the 802.3 clause 22 register set for
* clause 37 negotiation and/or SGMII control.
*
* Configure the clause 37 PCS advertisement as specified by @state. This
* does not trigger a renegotiation; phylink will do that via the
* mac_an_restart() method of the struct phylink_mac_ops structure.
*
* Returns negative error code on failure to configure the advertisement,
* zero if no change has been made, or one if the advertisement has changed.
*/
int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs,
const struct phylink_link_state *state)
{
struct mii_bus *bus = pcs->bus;
int addr = pcs->addr;
int val, ret;
u16 adv;
switch (state->interface) {
case PHY_INTERFACE_MODE_1000BASEX:
case PHY_INTERFACE_MODE_2500BASEX:
adv = ADVERTISE_1000XFULL;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
state->advertising))
adv |= ADVERTISE_1000XPAUSE;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
state->advertising))
adv |= ADVERTISE_1000XPSE_ASYM;
val = mdiobus_read(bus, addr, MII_ADVERTISE);
if (val < 0)
return val;
if (val == adv)
return 0;
ret = mdiobus_write(bus, addr, MII_ADVERTISE, adv);
if (ret < 0)
return ret;
return 1;
case PHY_INTERFACE_MODE_SGMII:
val = mdiobus_read(bus, addr, MII_ADVERTISE);
if (val < 0)
return val;
if (val == 0x0001)
return 0;
ret = mdiobus_write(bus, addr, MII_ADVERTISE, 0x0001);
if (ret < 0)
return ret;
return 1;
default:
/* Nothing to do for other modes */
return 0;
}
}
EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_set_advertisement);
/**
* 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)
{
struct mii_bus *bus = pcs->bus;
int val, addr = pcs->addr;
val = mdiobus_read(bus, addr, MII_BMCR);
if (val >= 0) {
val |= BMCR_ANRESTART;
mdiobus_write(bus, addr, MII_BMCR, val);
}
}
EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart);
#define C45_ADDR(d,a) (MII_ADDR_C45 | (d) << 16 | (a))
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_read(bus, addr, C45_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);
MODULE_LICENSE("GPL v2");
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