2756 lines
75 KiB
C
2756 lines
75 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* phylink models the MAC to optional PHY connection, supporting
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* technologies such as SFP cages where the PHY is hot-pluggable.
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*
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* Copyright (C) 2015 Russell King
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*/
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#include <linux/acpi.h>
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#include <linux/ethtool.h>
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#include <linux/export.h>
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#include <linux/gpio/consumer.h>
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#include <linux/netdevice.h>
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#include <linux/of.h>
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#include <linux/of_mdio.h>
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#include <linux/phy.h>
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#include <linux/phy_fixed.h>
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#include <linux/phylink.h>
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#include <linux/rtnetlink.h>
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#include <linux/spinlock.h>
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#include <linux/timer.h>
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#include <linux/workqueue.h>
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#include "sfp.h"
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#include "swphy.h"
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#define SUPPORTED_INTERFACES \
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(SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \
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SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane)
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#define ADVERTISED_INTERFACES \
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(ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \
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ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane)
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enum {
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PHYLINK_DISABLE_STOPPED,
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PHYLINK_DISABLE_LINK,
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PHYLINK_DISABLE_MAC_WOL,
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};
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/**
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* struct phylink - internal data type for phylink
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*/
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struct phylink {
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/* private: */
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struct net_device *netdev;
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const struct phylink_mac_ops *mac_ops;
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const struct phylink_pcs_ops *pcs_ops;
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struct phylink_config *config;
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struct phylink_pcs *pcs;
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struct device *dev;
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unsigned int old_link_state:1;
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unsigned long phylink_disable_state; /* bitmask of disables */
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struct phy_device *phydev;
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phy_interface_t link_interface; /* PHY_INTERFACE_xxx */
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u8 cfg_link_an_mode; /* MLO_AN_xxx */
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u8 cur_link_an_mode;
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u8 link_port; /* The current non-phy ethtool port */
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__ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
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/* The link configuration settings */
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struct phylink_link_state link_config;
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/* The current settings */
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phy_interface_t cur_interface;
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struct gpio_desc *link_gpio;
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unsigned int link_irq;
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struct timer_list link_poll;
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void (*get_fixed_state)(struct net_device *dev,
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struct phylink_link_state *s);
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struct mutex state_mutex;
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struct phylink_link_state phy_state;
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struct work_struct resolve;
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bool mac_link_dropped;
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struct sfp_bus *sfp_bus;
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bool sfp_may_have_phy;
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__ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support);
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u8 sfp_port;
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};
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#define phylink_printk(level, pl, fmt, ...) \
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do { \
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if ((pl)->config->type == PHYLINK_NETDEV) \
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netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \
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else if ((pl)->config->type == PHYLINK_DEV) \
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dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \
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} while (0)
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#define phylink_err(pl, fmt, ...) \
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phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__)
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#define phylink_warn(pl, fmt, ...) \
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phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__)
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#define phylink_info(pl, fmt, ...) \
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phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__)
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#if defined(CONFIG_DYNAMIC_DEBUG)
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#define phylink_dbg(pl, fmt, ...) \
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do { \
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if ((pl)->config->type == PHYLINK_NETDEV) \
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netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \
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else if ((pl)->config->type == PHYLINK_DEV) \
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dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \
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} while (0)
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#elif defined(DEBUG)
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#define phylink_dbg(pl, fmt, ...) \
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phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__)
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#else
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#define phylink_dbg(pl, fmt, ...) \
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({ \
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if (0) \
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phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \
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})
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#endif
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/**
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* phylink_set_port_modes() - set the port type modes in the ethtool mask
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* @mask: ethtool link mode mask
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*
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* Sets all the port type modes in the ethtool mask. MAC drivers should
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* use this in their 'validate' callback.
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*/
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void phylink_set_port_modes(unsigned long *mask)
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{
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phylink_set(mask, TP);
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phylink_set(mask, AUI);
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phylink_set(mask, MII);
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phylink_set(mask, FIBRE);
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phylink_set(mask, BNC);
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phylink_set(mask, Backplane);
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}
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EXPORT_SYMBOL_GPL(phylink_set_port_modes);
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static int phylink_is_empty_linkmode(const unsigned long *linkmode)
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{
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__ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, };
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phylink_set_port_modes(tmp);
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phylink_set(tmp, Autoneg);
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phylink_set(tmp, Pause);
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phylink_set(tmp, Asym_Pause);
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return linkmode_subset(linkmode, tmp);
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}
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static const char *phylink_an_mode_str(unsigned int mode)
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{
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static const char *modestr[] = {
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[MLO_AN_PHY] = "phy",
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[MLO_AN_FIXED] = "fixed",
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[MLO_AN_INBAND] = "inband",
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};
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return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
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}
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static int phylink_validate(struct phylink *pl, unsigned long *supported,
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struct phylink_link_state *state)
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{
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pl->mac_ops->validate(pl->config, supported, state);
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return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
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}
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static int phylink_parse_fixedlink(struct phylink *pl,
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struct fwnode_handle *fwnode)
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{
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struct fwnode_handle *fixed_node;
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const struct phy_setting *s;
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struct gpio_desc *desc;
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u32 speed;
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int ret;
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fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link");
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if (fixed_node) {
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ret = fwnode_property_read_u32(fixed_node, "speed", &speed);
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pl->link_config.speed = speed;
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pl->link_config.duplex = DUPLEX_HALF;
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if (fwnode_property_read_bool(fixed_node, "full-duplex"))
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pl->link_config.duplex = DUPLEX_FULL;
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/* We treat the "pause" and "asym-pause" terminology as
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* defining the link partner's ability.
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*/
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if (fwnode_property_read_bool(fixed_node, "pause"))
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__set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
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pl->link_config.lp_advertising);
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if (fwnode_property_read_bool(fixed_node, "asym-pause"))
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__set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
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pl->link_config.lp_advertising);
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if (ret == 0) {
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desc = fwnode_gpiod_get_index(fixed_node, "link", 0,
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GPIOD_IN, "?");
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if (!IS_ERR(desc))
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pl->link_gpio = desc;
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else if (desc == ERR_PTR(-EPROBE_DEFER))
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ret = -EPROBE_DEFER;
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}
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fwnode_handle_put(fixed_node);
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if (ret)
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return ret;
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} else {
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u32 prop[5];
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ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
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NULL, 0);
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if (ret != ARRAY_SIZE(prop)) {
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phylink_err(pl, "broken fixed-link?\n");
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return -EINVAL;
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}
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ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
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prop, ARRAY_SIZE(prop));
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if (!ret) {
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pl->link_config.duplex = prop[1] ?
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DUPLEX_FULL : DUPLEX_HALF;
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pl->link_config.speed = prop[2];
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if (prop[3])
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__set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
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pl->link_config.lp_advertising);
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if (prop[4])
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__set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
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pl->link_config.lp_advertising);
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}
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}
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if (pl->link_config.speed > SPEED_1000 &&
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pl->link_config.duplex != DUPLEX_FULL)
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phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n",
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pl->link_config.speed);
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bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
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linkmode_copy(pl->link_config.advertising, pl->supported);
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phylink_validate(pl, pl->supported, &pl->link_config);
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s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
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pl->supported, true);
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linkmode_zero(pl->supported);
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phylink_set(pl->supported, MII);
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phylink_set(pl->supported, Pause);
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phylink_set(pl->supported, Asym_Pause);
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phylink_set(pl->supported, Autoneg);
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if (s) {
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__set_bit(s->bit, pl->supported);
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__set_bit(s->bit, pl->link_config.lp_advertising);
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} else {
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phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n",
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pl->link_config.duplex == DUPLEX_FULL ? "full" : "half",
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pl->link_config.speed);
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}
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linkmode_and(pl->link_config.advertising, pl->link_config.advertising,
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pl->supported);
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pl->link_config.link = 1;
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pl->link_config.an_complete = 1;
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return 0;
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}
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static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode)
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{
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struct fwnode_handle *dn;
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const char *managed;
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dn = fwnode_get_named_child_node(fwnode, "fixed-link");
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if (dn || fwnode_property_present(fwnode, "fixed-link"))
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pl->cfg_link_an_mode = MLO_AN_FIXED;
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fwnode_handle_put(dn);
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if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 &&
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strcmp(managed, "in-band-status") == 0) ||
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pl->config->ovr_an_inband) {
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if (pl->cfg_link_an_mode == MLO_AN_FIXED) {
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phylink_err(pl,
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"can't use both fixed-link and in-band-status\n");
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return -EINVAL;
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}
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linkmode_zero(pl->supported);
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phylink_set(pl->supported, MII);
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phylink_set(pl->supported, Autoneg);
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phylink_set(pl->supported, Asym_Pause);
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phylink_set(pl->supported, Pause);
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pl->link_config.an_enabled = true;
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pl->cfg_link_an_mode = MLO_AN_INBAND;
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switch (pl->link_config.interface) {
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case PHY_INTERFACE_MODE_SGMII:
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case PHY_INTERFACE_MODE_QSGMII:
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phylink_set(pl->supported, 10baseT_Half);
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phylink_set(pl->supported, 10baseT_Full);
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phylink_set(pl->supported, 100baseT_Half);
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phylink_set(pl->supported, 100baseT_Full);
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phylink_set(pl->supported, 1000baseT_Half);
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phylink_set(pl->supported, 1000baseT_Full);
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break;
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case PHY_INTERFACE_MODE_1000BASEX:
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phylink_set(pl->supported, 1000baseX_Full);
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break;
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case PHY_INTERFACE_MODE_2500BASEX:
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phylink_set(pl->supported, 2500baseX_Full);
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break;
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case PHY_INTERFACE_MODE_5GBASER:
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phylink_set(pl->supported, 5000baseT_Full);
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break;
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case PHY_INTERFACE_MODE_25GBASER:
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phylink_set(pl->supported, 25000baseCR_Full);
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phylink_set(pl->supported, 25000baseKR_Full);
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phylink_set(pl->supported, 25000baseSR_Full);
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fallthrough;
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case PHY_INTERFACE_MODE_USXGMII:
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case PHY_INTERFACE_MODE_10GKR:
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case PHY_INTERFACE_MODE_10GBASER:
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phylink_set(pl->supported, 10baseT_Half);
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phylink_set(pl->supported, 10baseT_Full);
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phylink_set(pl->supported, 100baseT_Half);
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phylink_set(pl->supported, 100baseT_Full);
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phylink_set(pl->supported, 1000baseT_Half);
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phylink_set(pl->supported, 1000baseT_Full);
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phylink_set(pl->supported, 1000baseX_Full);
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phylink_set(pl->supported, 1000baseKX_Full);
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phylink_set(pl->supported, 2500baseT_Full);
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phylink_set(pl->supported, 2500baseX_Full);
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phylink_set(pl->supported, 5000baseT_Full);
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phylink_set(pl->supported, 10000baseT_Full);
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phylink_set(pl->supported, 10000baseKR_Full);
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phylink_set(pl->supported, 10000baseKX4_Full);
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phylink_set(pl->supported, 10000baseCR_Full);
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phylink_set(pl->supported, 10000baseSR_Full);
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phylink_set(pl->supported, 10000baseLR_Full);
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phylink_set(pl->supported, 10000baseLRM_Full);
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phylink_set(pl->supported, 10000baseER_Full);
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break;
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case PHY_INTERFACE_MODE_XLGMII:
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phylink_set(pl->supported, 25000baseCR_Full);
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phylink_set(pl->supported, 25000baseKR_Full);
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phylink_set(pl->supported, 25000baseSR_Full);
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phylink_set(pl->supported, 40000baseKR4_Full);
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phylink_set(pl->supported, 40000baseCR4_Full);
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phylink_set(pl->supported, 40000baseSR4_Full);
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phylink_set(pl->supported, 40000baseLR4_Full);
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phylink_set(pl->supported, 50000baseCR2_Full);
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phylink_set(pl->supported, 50000baseKR2_Full);
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phylink_set(pl->supported, 50000baseSR2_Full);
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phylink_set(pl->supported, 50000baseKR_Full);
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phylink_set(pl->supported, 50000baseSR_Full);
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phylink_set(pl->supported, 50000baseCR_Full);
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phylink_set(pl->supported, 50000baseLR_ER_FR_Full);
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phylink_set(pl->supported, 50000baseDR_Full);
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phylink_set(pl->supported, 100000baseKR4_Full);
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phylink_set(pl->supported, 100000baseSR4_Full);
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phylink_set(pl->supported, 100000baseCR4_Full);
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phylink_set(pl->supported, 100000baseLR4_ER4_Full);
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phylink_set(pl->supported, 100000baseKR2_Full);
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phylink_set(pl->supported, 100000baseSR2_Full);
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phylink_set(pl->supported, 100000baseCR2_Full);
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phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full);
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phylink_set(pl->supported, 100000baseDR2_Full);
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break;
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default:
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phylink_err(pl,
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"incorrect link mode %s for in-band status\n",
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phy_modes(pl->link_config.interface));
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return -EINVAL;
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}
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linkmode_copy(pl->link_config.advertising, pl->supported);
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if (phylink_validate(pl, pl->supported, &pl->link_config)) {
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phylink_err(pl,
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"failed to validate link configuration for in-band status\n");
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return -EINVAL;
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}
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/* Check if MAC/PCS also supports Autoneg. */
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pl->link_config.an_enabled = phylink_test(pl->supported, Autoneg);
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}
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return 0;
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}
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static void phylink_apply_manual_flow(struct phylink *pl,
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struct phylink_link_state *state)
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{
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/* If autoneg is disabled, pause AN is also disabled */
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if (!state->an_enabled)
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state->pause &= ~MLO_PAUSE_AN;
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/* Manual configuration of pause modes */
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if (!(pl->link_config.pause & MLO_PAUSE_AN))
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state->pause = pl->link_config.pause;
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}
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static void phylink_resolve_flow(struct phylink_link_state *state)
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{
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bool tx_pause, rx_pause;
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state->pause = MLO_PAUSE_NONE;
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if (state->duplex == DUPLEX_FULL) {
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linkmode_resolve_pause(state->advertising,
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state->lp_advertising,
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&tx_pause, &rx_pause);
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if (tx_pause)
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state->pause |= MLO_PAUSE_TX;
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if (rx_pause)
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state->pause |= MLO_PAUSE_RX;
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}
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}
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static void phylink_mac_config(struct phylink *pl,
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const struct phylink_link_state *state)
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{
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phylink_dbg(pl,
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"%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
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__func__, phylink_an_mode_str(pl->cur_link_an_mode),
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phy_modes(state->interface),
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phy_speed_to_str(state->speed),
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phy_duplex_to_str(state->duplex),
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__ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
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state->pause, state->link, state->an_enabled);
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pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state);
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}
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static void phylink_mac_pcs_an_restart(struct phylink *pl)
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{
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if (pl->link_config.an_enabled &&
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phy_interface_mode_is_8023z(pl->link_config.interface) &&
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phylink_autoneg_inband(pl->cur_link_an_mode)) {
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if (pl->pcs_ops)
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pl->pcs_ops->pcs_an_restart(pl->pcs);
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else
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pl->mac_ops->mac_an_restart(pl->config);
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}
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}
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static void phylink_major_config(struct phylink *pl, bool restart,
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const struct phylink_link_state *state)
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{
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int err;
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phylink_dbg(pl, "major config %s\n", phy_modes(state->interface));
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if (pl->mac_ops->mac_prepare) {
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err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode,
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state->interface);
|
|
if (err < 0) {
|
|
phylink_err(pl, "mac_prepare failed: %pe\n",
|
|
ERR_PTR(err));
|
|
return;
|
|
}
|
|
}
|
|
|
|
phylink_mac_config(pl, state);
|
|
|
|
if (pl->pcs_ops) {
|
|
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));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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_ops) {
|
|
/* Legacy method */
|
|
phylink_mac_config(pl, &pl->link_config);
|
|
phylink_mac_pcs_an_restart(pl);
|
|
return 0;
|
|
}
|
|
|
|
phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__,
|
|
phylink_an_mode_str(pl->cur_link_an_mode),
|
|
phy_modes(pl->link_config.interface),
|
|
__ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising,
|
|
pl->link_config.pause);
|
|
|
|
/* Modern PCS-based method; update the advert at the PCS, and
|
|
* restart negotiation if the pcs_config() helper indicates that
|
|
* the programmed advertisement has changed.
|
|
*/
|
|
ret = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode,
|
|
pl->link_config.interface,
|
|
pl->link_config.advertising,
|
|
!!(pl->link_config.pause & MLO_PAUSE_AN));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (ret > 0)
|
|
phylink_mac_pcs_an_restart(pl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void phylink_mac_pcs_get_state(struct phylink *pl,
|
|
struct phylink_link_state *state)
|
|
{
|
|
linkmode_copy(state->advertising, pl->link_config.advertising);
|
|
linkmode_zero(state->lp_advertising);
|
|
state->interface = pl->link_config.interface;
|
|
state->an_enabled = pl->link_config.an_enabled;
|
|
state->speed = SPEED_UNKNOWN;
|
|
state->duplex = DUPLEX_UNKNOWN;
|
|
state->pause = MLO_PAUSE_NONE;
|
|
state->an_complete = 0;
|
|
state->link = 1;
|
|
|
|
if (pl->pcs_ops)
|
|
pl->pcs_ops->pcs_get_state(pl->pcs, state);
|
|
else if (pl->mac_ops->mac_pcs_get_state)
|
|
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;
|
|
|
|
pl->cur_interface = link_state.interface;
|
|
|
|
if (pl->pcs_ops && pl->pcs_ops->pcs_link_up)
|
|
pl->pcs_ops->pcs_link_up(pl->pcs, pl->cur_link_an_mode,
|
|
pl->cur_interface,
|
|
link_state.speed, link_state.duplex);
|
|
|
|
pl->mac_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_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 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_ops) {
|
|
/* 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 PCS installed (an
|
|
* unconverted user.)
|
|
*/
|
|
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_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
|
|
* @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)
|
|
{
|
|
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);
|
|
netif_carrier_off(pl->netdev);
|
|
} 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->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_set_pcs() - set the current PCS for phylink to use
|
|
* @pl: a pointer to a &struct phylink returned from phylink_create()
|
|
* @pcs: a pointer to the &struct phylink_pcs
|
|
*
|
|
* Bind the MAC PCS to phylink. This may be called after phylink_create(),
|
|
* in mac_prepare() or mac_config() methods if it is desired to dynamically
|
|
* change the PCS.
|
|
*
|
|
* Please note that there are behavioural changes with the mac_config()
|
|
* callback if a PCS is present (denoting a newer setup) so removing a PCS
|
|
* is not supported, and if a PCS is going to be used, it must be registered
|
|
* by calling phylink_set_pcs() at the latest in the first mac_config() call.
|
|
*/
|
|
void phylink_set_pcs(struct phylink *pl, struct phylink_pcs *pcs)
|
|
{
|
|
pl->pcs = pcs;
|
|
pl->pcs_ops = pcs->ops;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phylink_set_pcs);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
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/%s\n", up ? "up" : "down",
|
|
phy_modes(phydev->interface),
|
|
phy_speed_to_str(phydev->speed),
|
|
phy_duplex_to_str(phydev->duplex),
|
|
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);
|
|
|
|
/* 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);
|
|
|
|
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))))
|
|
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;
|
|
|
|
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);
|
|
|
|
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)
|
|
poll = true;
|
|
}
|
|
|
|
switch (pl->cfg_link_an_mode) {
|
|
case MLO_AN_FIXED:
|
|
poll |= pl->config->poll_fixed_state;
|
|
break;
|
|
case MLO_AN_INBAND:
|
|
poll |= pl->config->pcs_poll;
|
|
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 */
|
|
clear_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state);
|
|
phylink_run_resolve(pl);
|
|
} 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);
|
|
kset->base.speed = state->speed;
|
|
kset->base.duplex = state->duplex;
|
|
kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE :
|
|
AUTONEG_DISABLE;
|
|
}
|
|
|
|
/**
|
|
* phylink_ethtool_ksettings_get() - get the current link settings
|
|
* @pl: a pointer to a &struct phylink returned from phylink_create()
|
|
* @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings
|
|
*
|
|
* Read the current link settings for the phylink instance specified by @pl.
|
|
* This will be the link settings read from the MAC, PHY or fixed link
|
|
* settings depending on the current negotiation mode.
|
|
*/
|
|
int phylink_ethtool_ksettings_get(struct phylink *pl,
|
|
struct ethtool_link_ksettings *kset)
|
|
{
|
|
struct phylink_link_state link_state;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (pl->phydev)
|
|
phy_ethtool_ksettings_get(pl->phydev, kset);
|
|
else
|
|
kset->base.port = pl->link_port;
|
|
|
|
linkmode_copy(kset->link_modes.supported, pl->supported);
|
|
|
|
switch (pl->cur_link_an_mode) {
|
|
case MLO_AN_FIXED:
|
|
/* We are using fixed settings. Report these as the
|
|
* current link settings - and note that these also
|
|
* represent the supported speeds/duplex/pause modes.
|
|
*/
|
|
phylink_get_fixed_state(pl, &link_state);
|
|
phylink_get_ksettings(&link_state, kset);
|
|
break;
|
|
|
|
case MLO_AN_INBAND:
|
|
/* If there is a phy attached, then use the reported
|
|
* settings from the phy with no modification.
|
|
*/
|
|
if (pl->phydev)
|
|
break;
|
|
|
|
phylink_mac_pcs_get_state(pl, &link_state);
|
|
|
|
/* The MAC is reporting the link results from its own PCS
|
|
* layer via in-band status. Report these as the current
|
|
* link settings.
|
|
*/
|
|
phylink_get_ksettings(&link_state, kset);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get);
|
|
|
|
/**
|
|
* phylink_ethtool_ksettings_set() - set the link settings
|
|
* @pl: a pointer to a &struct phylink returned from phylink_create()
|
|
* @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes
|
|
*/
|
|
int phylink_ethtool_ksettings_set(struct phylink *pl,
|
|
const struct ethtool_link_ksettings *kset)
|
|
{
|
|
__ETHTOOL_DECLARE_LINK_MODE_MASK(support);
|
|
struct phylink_link_state config;
|
|
const struct phy_setting *s;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (pl->phydev) {
|
|
/* We can rely on phylib for this update; we also do not need
|
|
* to update the pl->link_config settings:
|
|
* - the configuration returned via ksettings_get() will come
|
|
* from phylib whenever a PHY is present.
|
|
* - link_config.interface will be updated by the PHY calling
|
|
* back via phylink_phy_change() and a subsequent resolve.
|
|
* - initial link configuration for PHY mode comes from the
|
|
* last phy state updated via phylink_phy_change().
|
|
* - other configuration changes (e.g. pause modes) are
|
|
* performed directly via phylib.
|
|
* - if in in-band mode with a PHY, the link configuration
|
|
* is passed on the link from the PHY, and all of
|
|
* link_config.{speed,duplex,an_enabled,pause} are not used.
|
|
* - the only possible use would be link_config.advertising
|
|
* pause modes when in 1000base-X mode with a PHY, but in
|
|
* the presence of a PHY, this should not be changed as that
|
|
* should be determined from the media side advertisement.
|
|
*/
|
|
return phy_ethtool_ksettings_set(pl->phydev, kset);
|
|
}
|
|
|
|
config = pl->link_config;
|
|
|
|
/* Mask out unsupported advertisements */
|
|
linkmode_and(config.advertising, kset->link_modes.advertising,
|
|
pl->supported);
|
|
|
|
/* FIXME: should we reject autoneg if phy/mac does not support it? */
|
|
switch (kset->base.autoneg) {
|
|
case AUTONEG_DISABLE:
|
|
/* Autonegotiation disabled, select a suitable speed and
|
|
* duplex.
|
|
*/
|
|
s = phy_lookup_setting(kset->base.speed, kset->base.duplex,
|
|
pl->supported, false);
|
|
if (!s)
|
|
return -EINVAL;
|
|
|
|
/* If we have a fixed link, refuse to change link parameters.
|
|
* If the link parameters match, accept them but do nothing.
|
|
*/
|
|
if (pl->cur_link_an_mode == MLO_AN_FIXED) {
|
|
if (s->speed != pl->link_config.speed ||
|
|
s->duplex != pl->link_config.duplex)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
config.speed = s->speed;
|
|
config.duplex = s->duplex;
|
|
break;
|
|
|
|
case AUTONEG_ENABLE:
|
|
/* If we have a fixed link, allow autonegotiation (since that
|
|
* is our default case) but do not allow the advertisement to
|
|
* be changed. If the advertisement matches, simply return.
|
|
*/
|
|
if (pl->cur_link_an_mode == MLO_AN_FIXED) {
|
|
if (!linkmode_equal(config.advertising,
|
|
pl->link_config.advertising))
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
config.speed = SPEED_UNKNOWN;
|
|
config.duplex = DUPLEX_UNKNOWN;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* We have ruled out the case with a PHY attached, and the
|
|
* fixed-link cases. All that is left are in-band links.
|
|
*/
|
|
config.an_enabled = kset->base.autoneg == AUTONEG_ENABLE;
|
|
linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising,
|
|
config.an_enabled);
|
|
|
|
/* Validate without changing the current supported mask. */
|
|
linkmode_copy(support, pl->supported);
|
|
if (phylink_validate(pl, support, &config))
|
|
return -EINVAL;
|
|
|
|
/* If autonegotiation is enabled, we must have an advertisement */
|
|
if (config.an_enabled && phylink_is_empty_linkmode(config.advertising))
|
|
return -EINVAL;
|
|
|
|
/* 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_port && 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;
|
|
}
|
|
}
|
|
|
|
mutex_lock(&pl->state_mutex);
|
|
pl->link_config.speed = config.speed;
|
|
pl->link_config.duplex = config.duplex;
|
|
pl->link_config.an_enabled = config.an_enabled;
|
|
|
|
if (pl->link_config.interface != config.interface) {
|
|
/* The interface changed, e.g. 1000base-X <-> 2500base-X */
|
|
/* We need to force the link down, then change the interface */
|
|
if (pl->old_link_state) {
|
|
phylink_link_down(pl);
|
|
pl->old_link_state = false;
|
|
}
|
|
if (!test_bit(PHYLINK_DISABLE_STOPPED,
|
|
&pl->phylink_disable_state))
|
|
phylink_major_config(pl, false, &config);
|
|
pl->link_config.interface = config.interface;
|
|
linkmode_copy(pl->link_config.advertising, config.advertising);
|
|
} else if (!linkmode_equal(pl->link_config.advertising,
|
|
config.advertising)) {
|
|
linkmode_copy(pl->link_config.advertising, config.advertising);
|
|
phylink_change_inband_advert(pl);
|
|
}
|
|
mutex_unlock(&pl->state_mutex);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);
|
|
|
|
/**
|
|
* phylink_ethtool_nway_reset() - restart negotiation
|
|
* @pl: a pointer to a &struct phylink returned from phylink_create()
|
|
*
|
|
* Restart negotiation for the phylink instance specified by @pl. This will
|
|
* cause any attached phy to restart negotiation with the link partner, and
|
|
* if the MAC is in a BaseX mode, the MAC will also be requested to restart
|
|
* negotiation.
|
|
*
|
|
* Returns zero on success, or negative error code.
|
|
*/
|
|
int phylink_ethtool_nway_reset(struct phylink *pl)
|
|
{
|
|
int ret = 0;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (pl->phydev)
|
|
ret = phy_restart_aneg(pl->phydev);
|
|
phylink_mac_pcs_an_restart(pl);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);
|
|
|
|
/**
|
|
* phylink_ethtool_get_pauseparam() - get the current pause parameters
|
|
* @pl: a pointer to a &struct phylink returned from phylink_create()
|
|
* @pause: a pointer to a &struct ethtool_pauseparam
|
|
*/
|
|
void phylink_ethtool_get_pauseparam(struct phylink *pl,
|
|
struct ethtool_pauseparam *pause)
|
|
{
|
|
ASSERT_RTNL();
|
|
|
|
pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN);
|
|
pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX);
|
|
pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX);
|
|
}
|
|
EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);
|
|
|
|
/**
|
|
* phylink_ethtool_set_pauseparam() - set the current pause parameters
|
|
* @pl: a pointer to a &struct phylink returned from phylink_create()
|
|
* @pause: a pointer to a &struct ethtool_pauseparam
|
|
*/
|
|
int phylink_ethtool_set_pauseparam(struct phylink *pl,
|
|
struct ethtool_pauseparam *pause)
|
|
{
|
|
struct phylink_link_state *config = &pl->link_config;
|
|
bool manual_changed;
|
|
int pause_state;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (pl->cur_link_an_mode == MLO_AN_FIXED)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!phylink_test(pl->supported, Pause) &&
|
|
!phylink_test(pl->supported, Asym_Pause))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!phylink_test(pl->supported, Asym_Pause) &&
|
|
pause->rx_pause != pause->tx_pause)
|
|
return -EINVAL;
|
|
|
|
pause_state = 0;
|
|
if (pause->autoneg)
|
|
pause_state |= MLO_PAUSE_AN;
|
|
if (pause->rx_pause)
|
|
pause_state |= MLO_PAUSE_RX;
|
|
if (pause->tx_pause)
|
|
pause_state |= MLO_PAUSE_TX;
|
|
|
|
mutex_lock(&pl->state_mutex);
|
|
/*
|
|
* See the comments for linkmode_set_pause(), wrt the deficiencies
|
|
* with the current implementation. A solution to this issue would
|
|
* be:
|
|
* ethtool Local device
|
|
* rx tx Pause AsymDir
|
|
* 0 0 0 0
|
|
* 1 0 1 1
|
|
* 0 1 0 1
|
|
* 1 1 1 1
|
|
* and then use the ethtool rx/tx enablement status to mask the
|
|
* rx/tx pause resolution.
|
|
*/
|
|
linkmode_set_pause(config->advertising, pause->tx_pause,
|
|
pause->rx_pause);
|
|
|
|
manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN ||
|
|
(!(pause_state & MLO_PAUSE_AN) &&
|
|
(config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK);
|
|
|
|
config->pause = pause_state;
|
|
|
|
/* Update our in-band advertisement, triggering a renegotiation if
|
|
* the advertisement changed.
|
|
*/
|
|
if (!pl->phydev)
|
|
phylink_change_inband_advert(pl);
|
|
|
|
mutex_unlock(&pl->state_mutex);
|
|
|
|
/* If we have a PHY, a change of the pause frame advertisement will
|
|
* cause phylib to renegotiate (if AN is enabled) which will in turn
|
|
* call our phylink_phy_change() and trigger a resolve. Note that
|
|
* we can't hold our state mutex while calling phy_set_asym_pause().
|
|
*/
|
|
if (pl->phydev)
|
|
phy_set_asym_pause(pl->phydev, pause->rx_pause,
|
|
pause->tx_pause);
|
|
|
|
/* If the manual pause settings changed, make sure we trigger a
|
|
* resolve to update their state; we can not guarantee that the
|
|
* link will cycle.
|
|
*/
|
|
if (manual_changed) {
|
|
pl->mac_link_dropped = true;
|
|
phylink_run_resolve(pl);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
|
|
|
|
/**
|
|
* phylink_get_eee_err() - read the energy efficient ethernet error
|
|
* counter
|
|
* @pl: a pointer to a &struct phylink returned from phylink_create().
|
|
*
|
|
* Read the Energy Efficient Ethernet error counter from the PHY associated
|
|
* with the phylink instance specified by @pl.
|
|
*
|
|
* Returns positive error counter value, or negative error code.
|
|
*/
|
|
int phylink_get_eee_err(struct phylink *pl)
|
|
{
|
|
int ret = 0;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (pl->phydev)
|
|
ret = phy_get_eee_err(pl->phydev);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phylink_get_eee_err);
|
|
|
|
/**
|
|
* phylink_init_eee() - init and check the EEE features
|
|
* @pl: a pointer to a &struct phylink returned from phylink_create()
|
|
* @clk_stop_enable: allow PHY to stop receive clock
|
|
*
|
|
* Must be called either with RTNL held or within mac_link_up()
|
|
*/
|
|
int phylink_init_eee(struct phylink *pl, bool clk_stop_enable)
|
|
{
|
|
int ret = -EOPNOTSUPP;
|
|
|
|
if (pl->phydev)
|
|
ret = phy_init_eee(pl->phydev, clk_stop_enable);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phylink_init_eee);
|
|
|
|
/**
|
|
* phylink_ethtool_get_eee() - read the energy efficient ethernet parameters
|
|
* @pl: a pointer to a &struct phylink returned from phylink_create()
|
|
* @eee: a pointer to a &struct ethtool_eee for the read parameters
|
|
*/
|
|
int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee)
|
|
{
|
|
int ret = -EOPNOTSUPP;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (pl->phydev)
|
|
ret = phy_ethtool_get_eee(pl->phydev, eee);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);
|
|
|
|
/**
|
|
* phylink_ethtool_set_eee() - set the energy efficient ethernet parameters
|
|
* @pl: a pointer to a &struct phylink returned from phylink_create()
|
|
* @eee: a pointer to a &struct ethtool_eee for the desired parameters
|
|
*/
|
|
int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee)
|
|
{
|
|
int ret = -EOPNOTSUPP;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (pl->phydev)
|
|
ret = phy_ethtool_set_eee(pl->phydev, eee);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee);
|
|
|
|
/* This emulates MII registers for a fixed-mode phy operating as per the
|
|
* passed in state. "aneg" defines if we report negotiation is possible.
|
|
*
|
|
* FIXME: should deal with negotiation state too.
|
|
*/
|
|
static int phylink_mii_emul_read(unsigned int reg,
|
|
struct phylink_link_state *state)
|
|
{
|
|
struct fixed_phy_status fs;
|
|
unsigned long *lpa = state->lp_advertising;
|
|
int val;
|
|
|
|
fs.link = state->link;
|
|
fs.speed = state->speed;
|
|
fs.duplex = state->duplex;
|
|
fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa);
|
|
fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa);
|
|
|
|
val = swphy_read_reg(reg, &fs);
|
|
if (reg == MII_BMSR) {
|
|
if (!state->an_complete)
|
|
val &= ~BMSR_ANEGCOMPLETE;
|
|
}
|
|
return val;
|
|
}
|
|
|
|
static int phylink_phy_read(struct phylink *pl, unsigned int phy_id,
|
|
unsigned int reg)
|
|
{
|
|
struct phy_device *phydev = pl->phydev;
|
|
int prtad, devad;
|
|
|
|
if (mdio_phy_id_is_c45(phy_id)) {
|
|
prtad = mdio_phy_id_prtad(phy_id);
|
|
devad = mdio_phy_id_devad(phy_id);
|
|
devad = mdiobus_c45_addr(devad, 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.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;
|
|
devad = mdiobus_c45_addr(devad, 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 = mdiobus_c45_addr(devad, 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.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;
|
|
devad = mdiobus_c45_addr(devad, 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;
|
|
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 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) ||
|
|
!linkmode_equal(pl->link_config.advertising,
|
|
config.advertising);
|
|
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, false);
|
|
|
|
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_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_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:
|
|
case PHY_INTERFACE_MODE_QSGMII:
|
|
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.
|
|
* @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.
|
|
*
|
|
* 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,
|
|
phy_interface_t interface,
|
|
const unsigned long *advertising)
|
|
{
|
|
struct mii_bus *bus = pcs->bus;
|
|
int addr = pcs->addr;
|
|
int val, ret;
|
|
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;
|
|
|
|
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_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;
|
|
u16 bmcr;
|
|
int ret;
|
|
|
|
ret = phylink_mii_c22_pcs_set_advertisement(pcs, interface,
|
|
advertising);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
changed = ret > 0;
|
|
|
|
/* Ensure ISOLATE bit is disabled */
|
|
bmcr = mode == MLO_AN_INBAND ? BMCR_ANENABLE : 0;
|
|
ret = mdiobus_modify(pcs->bus, pcs->addr, MII_BMCR,
|
|
BMCR_ANENABLE | BMCR_ISOLATE, bmcr);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return changed ? 1 : 0;
|
|
}
|
|
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)
|
|
{
|
|
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);
|
|
|
|
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);
|
|
|
|
MODULE_LICENSE("GPL v2");
|