| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * phylink models the MAC to optional PHY connection, supporting |
| * technologies such as SFP cages where the PHY is hot-pluggable. |
| * |
| * Copyright (C) 2015 Russell King |
| */ |
| #include <linux/acpi.h> |
| #include <linux/ethtool.h> |
| #include <linux/export.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/netdevice.h> |
| #include <linux/of.h> |
| #include <linux/of_mdio.h> |
| #include <linux/phy.h> |
| #include <linux/phy_fixed.h> |
| #include <linux/phylink.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/spinlock.h> |
| #include <linux/timer.h> |
| #include <linux/workqueue.h> |
| |
| #include "sfp.h" |
| #include "swphy.h" |
| |
| #define SUPPORTED_INTERFACES \ |
| (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \ |
| SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane) |
| #define ADVERTISED_INTERFACES \ |
| (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \ |
| ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane) |
| |
| enum { |
| PHYLINK_DISABLE_STOPPED, |
| PHYLINK_DISABLE_LINK, |
| PHYLINK_DISABLE_MAC_WOL, |
| }; |
| |
| /** |
| * struct phylink - internal data type for phylink |
| */ |
| struct phylink { |
| /* private: */ |
| struct net_device *netdev; |
| const struct phylink_mac_ops *mac_ops; |
| const struct phylink_pcs_ops *pcs_ops; |
| struct phylink_config *config; |
| struct phylink_pcs *pcs; |
| struct device *dev; |
| unsigned int old_link_state:1; |
| |
| unsigned long phylink_disable_state; /* bitmask of disables */ |
| struct phy_device *phydev; |
| phy_interface_t link_interface; /* PHY_INTERFACE_xxx */ |
| u8 cfg_link_an_mode; /* MLO_AN_xxx */ |
| u8 cur_link_an_mode; |
| u8 link_port; /* The current non-phy ethtool port */ |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); |
| |
| /* The link configuration settings */ |
| struct phylink_link_state link_config; |
| |
| /* The current settings */ |
| phy_interface_t cur_interface; |
| |
| struct gpio_desc *link_gpio; |
| unsigned int link_irq; |
| struct timer_list link_poll; |
| void (*get_fixed_state)(struct net_device *dev, |
| struct phylink_link_state *s); |
| |
| struct mutex state_mutex; |
| struct phylink_link_state phy_state; |
| struct work_struct resolve; |
| |
| bool mac_link_dropped; |
| |
| struct sfp_bus *sfp_bus; |
| bool sfp_may_have_phy; |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); |
| u8 sfp_port; |
| }; |
| |
| #define phylink_printk(level, pl, fmt, ...) \ |
| do { \ |
| if ((pl)->config->type == PHYLINK_NETDEV) \ |
| netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \ |
| else if ((pl)->config->type == PHYLINK_DEV) \ |
| dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \ |
| } while (0) |
| |
| #define phylink_err(pl, fmt, ...) \ |
| phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__) |
| #define phylink_warn(pl, fmt, ...) \ |
| phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__) |
| #define phylink_info(pl, fmt, ...) \ |
| phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__) |
| #if defined(CONFIG_DYNAMIC_DEBUG) |
| #define phylink_dbg(pl, fmt, ...) \ |
| do { \ |
| if ((pl)->config->type == PHYLINK_NETDEV) \ |
| netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \ |
| else if ((pl)->config->type == PHYLINK_DEV) \ |
| dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \ |
| } while (0) |
| #elif defined(DEBUG) |
| #define phylink_dbg(pl, fmt, ...) \ |
| phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__) |
| #else |
| #define phylink_dbg(pl, fmt, ...) \ |
| ({ \ |
| if (0) \ |
| phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \ |
| }) |
| #endif |
| |
| /** |
| * phylink_set_port_modes() - set the port type modes in the ethtool mask |
| * @mask: ethtool link mode mask |
| * |
| * Sets all the port type modes in the ethtool mask. MAC drivers should |
| * use this in their 'validate' callback. |
| */ |
| void phylink_set_port_modes(unsigned long *mask) |
| { |
| phylink_set(mask, TP); |
| phylink_set(mask, AUI); |
| phylink_set(mask, MII); |
| phylink_set(mask, FIBRE); |
| phylink_set(mask, BNC); |
| phylink_set(mask, Backplane); |
| } |
| EXPORT_SYMBOL_GPL(phylink_set_port_modes); |
| |
| void phylink_set_10g_modes(unsigned long *mask) |
| { |
| phylink_set(mask, 10000baseT_Full); |
| phylink_set(mask, 10000baseCR_Full); |
| phylink_set(mask, 10000baseSR_Full); |
| phylink_set(mask, 10000baseLR_Full); |
| phylink_set(mask, 10000baseLRM_Full); |
| phylink_set(mask, 10000baseER_Full); |
| } |
| EXPORT_SYMBOL_GPL(phylink_set_10g_modes); |
| |
| static int phylink_is_empty_linkmode(const unsigned long *linkmode) |
| { |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, }; |
| |
| phylink_set_port_modes(tmp); |
| phylink_set(tmp, Autoneg); |
| phylink_set(tmp, Pause); |
| phylink_set(tmp, Asym_Pause); |
| |
| return linkmode_subset(linkmode, tmp); |
| } |
| |
| static const char *phylink_an_mode_str(unsigned int mode) |
| { |
| static const char *modestr[] = { |
| [MLO_AN_PHY] = "phy", |
| [MLO_AN_FIXED] = "fixed", |
| [MLO_AN_INBAND] = "inband", |
| }; |
| |
| return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown"; |
| } |
| |
| static void phylink_caps_to_linkmodes(unsigned long *linkmodes, |
| unsigned long caps) |
| { |
| if (caps & MAC_SYM_PAUSE) |
| __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes); |
| |
| if (caps & MAC_ASYM_PAUSE) |
| __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes); |
| |
| if (caps & MAC_10HD) |
| __set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, linkmodes); |
| |
| if (caps & MAC_10FD) |
| __set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, linkmodes); |
| |
| if (caps & MAC_100HD) { |
| __set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT, linkmodes); |
| } |
| |
| if (caps & MAC_100FD) { |
| __set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100baseT1_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT, linkmodes); |
| } |
| |
| if (caps & MAC_1000HD) |
| __set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, linkmodes); |
| |
| if (caps & MAC_1000FD) { |
| __set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT, linkmodes); |
| } |
| |
| if (caps & MAC_2500FD) { |
| __set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, linkmodes); |
| } |
| |
| if (caps & MAC_5000FD) |
| __set_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, linkmodes); |
| |
| if (caps & MAC_10000FD) { |
| __set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_10000baseCR_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, linkmodes); |
| } |
| |
| if (caps & MAC_25000FD) { |
| __set_bit(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT, linkmodes); |
| } |
| |
| if (caps & MAC_40000FD) { |
| __set_bit(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT, linkmodes); |
| } |
| |
| if (caps & MAC_50000FD) { |
| __set_bit(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_50000baseKR_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_50000baseSR_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_50000baseCR_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT, |
| linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_50000baseDR_Full_BIT, linkmodes); |
| } |
| |
| if (caps & MAC_56000FD) { |
| __set_bit(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT, linkmodes); |
| } |
| |
| if (caps & MAC_100000FD) { |
| __set_bit(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT, |
| linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT, |
| linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseKR_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseSR_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseLR_ER_FR_Full_BIT, |
| linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseCR_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_100000baseDR_Full_BIT, linkmodes); |
| } |
| |
| if (caps & MAC_200000FD) { |
| __set_bit(ETHTOOL_LINK_MODE_200000baseKR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_200000baseSR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_200000baseLR4_ER4_FR4_Full_BIT, |
| linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_200000baseDR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_200000baseCR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_200000baseKR2_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_200000baseSR2_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_200000baseLR2_ER2_FR2_Full_BIT, |
| linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_200000baseDR2_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_200000baseCR2_Full_BIT, linkmodes); |
| } |
| |
| if (caps & MAC_400000FD) { |
| __set_bit(ETHTOOL_LINK_MODE_400000baseKR8_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_400000baseSR8_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_400000baseLR8_ER8_FR8_Full_BIT, |
| linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_400000baseDR8_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_400000baseCR8_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_400000baseKR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_400000baseSR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_400000baseLR4_ER4_FR4_Full_BIT, |
| linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_400000baseDR4_Full_BIT, linkmodes); |
| __set_bit(ETHTOOL_LINK_MODE_400000baseCR4_Full_BIT, linkmodes); |
| } |
| } |
| |
| /** |
| * phylink_get_linkmodes() - get acceptable link modes |
| * @linkmodes: ethtool linkmode mask (must be already initialised) |
| * @interface: phy interface mode defined by &typedef phy_interface_t |
| * @mac_capabilities: bitmask of MAC capabilities |
| * |
| * Set all possible pause, speed and duplex linkmodes in @linkmodes that |
| * are supported by the @interface mode and @mac_capabilities. @linkmodes |
| * must have been initialised previously. |
| */ |
| void phylink_get_linkmodes(unsigned long *linkmodes, phy_interface_t interface, |
| unsigned long mac_capabilities) |
| { |
| unsigned long caps = MAC_SYM_PAUSE | MAC_ASYM_PAUSE; |
| |
| switch (interface) { |
| case PHY_INTERFACE_MODE_USXGMII: |
| caps |= MAC_10000FD | MAC_5000FD | MAC_2500FD; |
| fallthrough; |
| |
| case PHY_INTERFACE_MODE_RGMII_TXID: |
| case PHY_INTERFACE_MODE_RGMII_RXID: |
| case PHY_INTERFACE_MODE_RGMII_ID: |
| case PHY_INTERFACE_MODE_RGMII: |
| case PHY_INTERFACE_MODE_QSGMII: |
| case PHY_INTERFACE_MODE_SGMII: |
| case PHY_INTERFACE_MODE_GMII: |
| caps |= MAC_1000HD | MAC_1000FD; |
| fallthrough; |
| |
| case PHY_INTERFACE_MODE_REVRMII: |
| case PHY_INTERFACE_MODE_RMII: |
| case PHY_INTERFACE_MODE_SMII: |
| case PHY_INTERFACE_MODE_REVMII: |
| case PHY_INTERFACE_MODE_MII: |
| caps |= MAC_10HD | MAC_10FD; |
| fallthrough; |
| |
| case PHY_INTERFACE_MODE_100BASEX: |
| caps |= MAC_100HD | MAC_100FD; |
| break; |
| |
| case PHY_INTERFACE_MODE_TBI: |
| case PHY_INTERFACE_MODE_MOCA: |
| case PHY_INTERFACE_MODE_RTBI: |
| case PHY_INTERFACE_MODE_1000BASEX: |
| caps |= MAC_1000HD; |
| fallthrough; |
| case PHY_INTERFACE_MODE_TRGMII: |
| caps |= MAC_1000FD; |
| break; |
| |
| case PHY_INTERFACE_MODE_2500BASEX: |
| caps |= MAC_2500FD; |
| break; |
| |
| case PHY_INTERFACE_MODE_5GBASER: |
| caps |= MAC_5000FD; |
| break; |
| |
| case PHY_INTERFACE_MODE_XGMII: |
| case PHY_INTERFACE_MODE_RXAUI: |
| case PHY_INTERFACE_MODE_XAUI: |
| case PHY_INTERFACE_MODE_10GBASER: |
| case PHY_INTERFACE_MODE_10GKR: |
| caps |= MAC_10000FD; |
| break; |
| |
| case PHY_INTERFACE_MODE_25GBASER: |
| caps |= MAC_25000FD; |
| break; |
| |
| case PHY_INTERFACE_MODE_XLGMII: |
| caps |= MAC_40000FD; |
| break; |
| |
| case PHY_INTERFACE_MODE_INTERNAL: |
| caps |= ~0; |
| break; |
| |
| case PHY_INTERFACE_MODE_NA: |
| case PHY_INTERFACE_MODE_MAX: |
| break; |
| } |
| |
| phylink_caps_to_linkmodes(linkmodes, caps & mac_capabilities); |
| } |
| EXPORT_SYMBOL_GPL(phylink_get_linkmodes); |
| |
| /** |
| * phylink_generic_validate() - generic validate() callback implementation |
| * @config: a pointer to a &struct phylink_config. |
| * @supported: ethtool bitmask for supported link modes. |
| * @state: a pointer to a &struct phylink_link_state. |
| * |
| * Generic implementation of the validate() callback that MAC drivers can |
| * use when they pass the range of supported interfaces and MAC capabilities. |
| * This makes use of phylink_get_linkmodes(). |
| */ |
| void phylink_generic_validate(struct phylink_config *config, |
| unsigned long *supported, |
| struct phylink_link_state *state) |
| { |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; |
| |
| phylink_set_port_modes(mask); |
| phylink_set(mask, Autoneg); |
| phylink_get_linkmodes(mask, state->interface, config->mac_capabilities); |
| |
| linkmode_and(supported, supported, mask); |
| linkmode_and(state->advertising, state->advertising, mask); |
| } |
| EXPORT_SYMBOL_GPL(phylink_generic_validate); |
| |
| static int phylink_validate_mac_and_pcs(struct phylink *pl, |
| unsigned long *supported, |
| struct phylink_link_state *state) |
| { |
| struct phylink_pcs *pcs; |
| int ret; |
| |
| /* Get the PCS for this interface mode */ |
| if (pl->mac_ops->mac_select_pcs) { |
| pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); |
| if (IS_ERR(pcs)) |
| return PTR_ERR(pcs); |
| } else { |
| pcs = pl->pcs; |
| } |
| |
| if (pcs) { |
| /* The PCS, if present, must be setup before phylink_create() |
| * has been called. If the ops is not initialised, print an |
| * error and backtrace rather than oopsing the kernel. |
| */ |
| if (!pcs->ops) { |
| phylink_err(pl, "interface %s: uninitialised PCS\n", |
| phy_modes(state->interface)); |
| dump_stack(); |
| return -EINVAL; |
| } |
| |
| /* Validate the link parameters with the PCS */ |
| if (pcs->ops->pcs_validate) { |
| ret = pcs->ops->pcs_validate(pcs, supported, state); |
| if (ret < 0 || phylink_is_empty_linkmode(supported)) |
| return -EINVAL; |
| |
| /* Ensure the advertising mask is a subset of the |
| * supported mask. |
| */ |
| linkmode_and(state->advertising, state->advertising, |
| supported); |
| } |
| } |
| |
| /* Then validate the link parameters with the MAC */ |
| pl->mac_ops->validate(pl->config, supported, state); |
| |
| return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; |
| } |
| |
| static int phylink_validate_any(struct phylink *pl, unsigned long *supported, |
| struct phylink_link_state *state) |
| { |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(all_adv) = { 0, }; |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(all_s) = { 0, }; |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(s); |
| struct phylink_link_state t; |
| int intf; |
| |
| for (intf = 0; intf < PHY_INTERFACE_MODE_MAX; intf++) { |
| if (test_bit(intf, pl->config->supported_interfaces)) { |
| linkmode_copy(s, supported); |
| |
| t = *state; |
| t.interface = intf; |
| if (!phylink_validate_mac_and_pcs(pl, s, &t)) { |
| linkmode_or(all_s, all_s, s); |
| linkmode_or(all_adv, all_adv, t.advertising); |
| } |
| } |
| } |
| |
| linkmode_copy(supported, all_s); |
| linkmode_copy(state->advertising, all_adv); |
| |
| return phylink_is_empty_linkmode(supported) ? -EINVAL : 0; |
| } |
| |
| static int phylink_validate(struct phylink *pl, unsigned long *supported, |
| struct phylink_link_state *state) |
| { |
| if (!phy_interface_empty(pl->config->supported_interfaces)) { |
| if (state->interface == PHY_INTERFACE_MODE_NA) |
| return phylink_validate_any(pl, supported, state); |
| |
| if (!test_bit(state->interface, |
| pl->config->supported_interfaces)) |
| return -EINVAL; |
| } |
| |
| return phylink_validate_mac_and_pcs(pl, supported, state); |
| } |
| |
| static int phylink_parse_fixedlink(struct phylink *pl, |
| struct fwnode_handle *fwnode) |
| { |
| struct fwnode_handle *fixed_node; |
| const struct phy_setting *s; |
| struct gpio_desc *desc; |
| u32 speed; |
| int ret; |
| |
| fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link"); |
| if (fixed_node) { |
| ret = fwnode_property_read_u32(fixed_node, "speed", &speed); |
| |
| pl->link_config.speed = speed; |
| pl->link_config.duplex = DUPLEX_HALF; |
| |
| if (fwnode_property_read_bool(fixed_node, "full-duplex")) |
| pl->link_config.duplex = DUPLEX_FULL; |
| |
| /* We treat the "pause" and "asym-pause" terminology as |
| * defining the link partner's ability. |
| */ |
| if (fwnode_property_read_bool(fixed_node, "pause")) |
| __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, |
| pl->link_config.lp_advertising); |
| if (fwnode_property_read_bool(fixed_node, "asym-pause")) |
| __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, |
| pl->link_config.lp_advertising); |
| |
| if (ret == 0) { |
| desc = fwnode_gpiod_get_index(fixed_node, "link", 0, |
| GPIOD_IN, "?"); |
| |
| if (!IS_ERR(desc)) |
| pl->link_gpio = desc; |
| else if (desc == ERR_PTR(-EPROBE_DEFER)) |
| ret = -EPROBE_DEFER; |
| } |
| fwnode_handle_put(fixed_node); |
| |
| if (ret) |
| return ret; |
| } else { |
| u32 prop[5]; |
| |
| ret = fwnode_property_read_u32_array(fwnode, "fixed-link", |
| NULL, 0); |
| if (ret != ARRAY_SIZE(prop)) { |
| phylink_err(pl, "broken fixed-link?\n"); |
| return -EINVAL; |
| } |
| |
| ret = fwnode_property_read_u32_array(fwnode, "fixed-link", |
| prop, ARRAY_SIZE(prop)); |
| if (!ret) { |
| pl->link_config.duplex = prop[1] ? |
| DUPLEX_FULL : DUPLEX_HALF; |
| pl->link_config.speed = prop[2]; |
| if (prop[3]) |
| __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, |
| pl->link_config.lp_advertising); |
| if (prop[4]) |
| __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, |
| pl->link_config.lp_advertising); |
| } |
| } |
| |
| if (pl->link_config.speed > SPEED_1000 && |
| pl->link_config.duplex != DUPLEX_FULL) |
| phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n", |
| pl->link_config.speed); |
| |
| bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS); |
| linkmode_copy(pl->link_config.advertising, pl->supported); |
| phylink_validate(pl, pl->supported, &pl->link_config); |
| |
| s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex, |
| pl->supported, true); |
| linkmode_zero(pl->supported); |
| phylink_set(pl->supported, MII); |
| phylink_set(pl->supported, Pause); |
| phylink_set(pl->supported, Asym_Pause); |
| phylink_set(pl->supported, Autoneg); |
| if (s) { |
| __set_bit(s->bit, pl->supported); |
| __set_bit(s->bit, pl->link_config.lp_advertising); |
| } else { |
| phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n", |
| pl->link_config.duplex == DUPLEX_FULL ? "full" : "half", |
| pl->link_config.speed); |
| } |
| |
| linkmode_and(pl->link_config.advertising, pl->link_config.advertising, |
| pl->supported); |
| |
| pl->link_config.link = 1; |
| pl->link_config.an_complete = 1; |
| |
| return 0; |
| } |
| |
| static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode) |
| { |
| struct fwnode_handle *dn; |
| const char *managed; |
| |
| dn = fwnode_get_named_child_node(fwnode, "fixed-link"); |
| if (dn || fwnode_property_present(fwnode, "fixed-link")) |
| pl->cfg_link_an_mode = MLO_AN_FIXED; |
| fwnode_handle_put(dn); |
| |
| if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 && |
| strcmp(managed, "in-band-status") == 0) || |
| pl->config->ovr_an_inband) { |
| if (pl->cfg_link_an_mode == MLO_AN_FIXED) { |
| phylink_err(pl, |
| "can't use both fixed-link and in-band-status\n"); |
| return -EINVAL; |
| } |
| |
| linkmode_zero(pl->supported); |
| phylink_set(pl->supported, MII); |
| phylink_set(pl->supported, Autoneg); |
| phylink_set(pl->supported, Asym_Pause); |
| phylink_set(pl->supported, Pause); |
| pl->link_config.an_enabled = true; |
| pl->cfg_link_an_mode = MLO_AN_INBAND; |
| |
| switch (pl->link_config.interface) { |
| case PHY_INTERFACE_MODE_SGMII: |
| case PHY_INTERFACE_MODE_QSGMII: |
| phylink_set(pl->supported, 10baseT_Half); |
| phylink_set(pl->supported, 10baseT_Full); |
| phylink_set(pl->supported, 100baseT_Half); |
| phylink_set(pl->supported, 100baseT_Full); |
| phylink_set(pl->supported, 1000baseT_Half); |
| phylink_set(pl->supported, 1000baseT_Full); |
| break; |
| |
| case PHY_INTERFACE_MODE_1000BASEX: |
| phylink_set(pl->supported, 1000baseX_Full); |
| break; |
| |
| case PHY_INTERFACE_MODE_2500BASEX: |
| phylink_set(pl->supported, 2500baseX_Full); |
| break; |
| |
| case PHY_INTERFACE_MODE_5GBASER: |
| phylink_set(pl->supported, 5000baseT_Full); |
| break; |
| |
| case PHY_INTERFACE_MODE_25GBASER: |
| phylink_set(pl->supported, 25000baseCR_Full); |
| phylink_set(pl->supported, 25000baseKR_Full); |
| phylink_set(pl->supported, 25000baseSR_Full); |
| fallthrough; |
| case PHY_INTERFACE_MODE_USXGMII: |
| case PHY_INTERFACE_MODE_10GKR: |
| case PHY_INTERFACE_MODE_10GBASER: |
| phylink_set(pl->supported, 10baseT_Half); |
| phylink_set(pl->supported, 10baseT_Full); |
| phylink_set(pl->supported, 100baseT_Half); |
| phylink_set(pl->supported, 100baseT_Full); |
| phylink_set(pl->supported, 1000baseT_Half); |
| phylink_set(pl->supported, 1000baseT_Full); |
| phylink_set(pl->supported, 1000baseX_Full); |
| phylink_set(pl->supported, 1000baseKX_Full); |
| phylink_set(pl->supported, 2500baseT_Full); |
| phylink_set(pl->supported, 2500baseX_Full); |
| phylink_set(pl->supported, 5000baseT_Full); |
| phylink_set(pl->supported, 10000baseT_Full); |
| phylink_set(pl->supported, 10000baseKR_Full); |
| phylink_set(pl->supported, 10000baseKX4_Full); |
| phylink_set(pl->supported, 10000baseCR_Full); |
| phylink_set(pl->supported, 10000baseSR_Full); |
| phylink_set(pl->supported, 10000baseLR_Full); |
| phylink_set(pl->supported, 10000baseLRM_Full); |
| phylink_set(pl->supported, 10000baseER_Full); |
| break; |
| |
| case PHY_INTERFACE_MODE_XLGMII: |
| phylink_set(pl->supported, 25000baseCR_Full); |
| phylink_set(pl->supported, 25000baseKR_Full); |
| phylink_set(pl->supported, 25000baseSR_Full); |
| phylink_set(pl->supported, 40000baseKR4_Full); |
| phylink_set(pl->supported, 40000baseCR4_Full); |
| phylink_set(pl->supported, 40000baseSR4_Full); |
| phylink_set(pl->supported, 40000baseLR4_Full); |
| phylink_set(pl->supported, 50000baseCR2_Full); |
| phylink_set(pl->supported, 50000baseKR2_Full); |
| phylink_set(pl->supported, 50000baseSR2_Full); |
| phylink_set(pl->supported, 50000baseKR_Full); |
| phylink_set(pl->supported, 50000baseSR_Full); |
| phylink_set(pl->supported, 50000baseCR_Full); |
| phylink_set(pl->supported, 50000baseLR_ER_FR_Full); |
| phylink_set(pl->supported, 50000baseDR_Full); |
| phylink_set(pl->supported, 100000baseKR4_Full); |
| phylink_set(pl->supported, 100000baseSR4_Full); |
| phylink_set(pl->supported, 100000baseCR4_Full); |
| phylink_set(pl->supported, 100000baseLR4_ER4_Full); |
| phylink_set(pl->supported, 100000baseKR2_Full); |
| phylink_set(pl->supported, 100000baseSR2_Full); |
| phylink_set(pl->supported, 100000baseCR2_Full); |
| phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full); |
| phylink_set(pl->supported, 100000baseDR2_Full); |
| break; |
| |
| default: |
| phylink_err(pl, |
| "incorrect link mode %s for in-band status\n", |
| phy_modes(pl->link_config.interface)); |
| return -EINVAL; |
| } |
| |
| linkmode_copy(pl->link_config.advertising, pl->supported); |
| |
| if (phylink_validate(pl, pl->supported, &pl->link_config)) { |
| phylink_err(pl, |
| "failed to validate link configuration for in-band status\n"); |
| return -EINVAL; |
| } |
| |
| /* Check if MAC/PCS also supports Autoneg. */ |
| pl->link_config.an_enabled = phylink_test(pl->supported, Autoneg); |
| } |
| |
| return 0; |
| } |
| |
| static void phylink_apply_manual_flow(struct phylink *pl, |
| struct phylink_link_state *state) |
| { |
| /* If autoneg is disabled, pause AN is also disabled */ |
| if (!state->an_enabled) |
| state->pause &= ~MLO_PAUSE_AN; |
| |
| /* Manual configuration of pause modes */ |
| if (!(pl->link_config.pause & MLO_PAUSE_AN)) |
| state->pause = pl->link_config.pause; |
| } |
| |
| static void phylink_resolve_flow(struct phylink_link_state *state) |
| { |
| bool tx_pause, rx_pause; |
| |
| state->pause = MLO_PAUSE_NONE; |
| if (state->duplex == DUPLEX_FULL) { |
| linkmode_resolve_pause(state->advertising, |
| state->lp_advertising, |
| &tx_pause, &rx_pause); |
| if (tx_pause) |
| state->pause |= MLO_PAUSE_TX; |
| if (rx_pause) |
| state->pause |= MLO_PAUSE_RX; |
| } |
| } |
| |
| static void phylink_mac_config(struct phylink *pl, |
| const struct phylink_link_state *state) |
| { |
| phylink_dbg(pl, |
| "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n", |
| __func__, phylink_an_mode_str(pl->cur_link_an_mode), |
| phy_modes(state->interface), |
| phy_speed_to_str(state->speed), |
| phy_duplex_to_str(state->duplex), |
| __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising, |
| state->pause, state->link, state->an_enabled); |
| |
| pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state); |
| } |
| |
| static void phylink_mac_pcs_an_restart(struct phylink *pl) |
| { |
| if (pl->link_config.an_enabled && |
| phy_interface_mode_is_8023z(pl->link_config.interface) && |
| phylink_autoneg_inband(pl->cur_link_an_mode)) { |
| if (pl->pcs_ops) |
| pl->pcs_ops->pcs_an_restart(pl->pcs); |
| else if (pl->config->legacy_pre_march2020) |
| pl->mac_ops->mac_an_restart(pl->config); |
| } |
| } |
| |
| static void phylink_major_config(struct phylink *pl, bool restart, |
| const struct phylink_link_state *state) |
| { |
| struct phylink_pcs *pcs = NULL; |
| int err; |
| |
| phylink_dbg(pl, "major config %s\n", phy_modes(state->interface)); |
| |
| if (pl->mac_ops->mac_select_pcs) { |
| pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); |
| if (IS_ERR(pcs)) { |
| phylink_err(pl, |
| "mac_select_pcs unexpectedly failed: %pe\n", |
| pcs); |
| return; |
| } |
| } |
| |
| if (pl->mac_ops->mac_prepare) { |
| err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode, |
| state->interface); |
| if (err < 0) { |
| phylink_err(pl, "mac_prepare failed: %pe\n", |
| ERR_PTR(err)); |
| return; |
| } |
| } |
| |
| /* If we have a new PCS, switch to the new PCS after preparing the MAC |
| * for the change. |
| */ |
| if (pcs) |
| phylink_set_pcs(pl, pcs); |
| |
| 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 && pl->config->legacy_pre_march2020) { |
| /* Legacy method */ |
| phylink_mac_config(pl, &pl->link_config); |
| phylink_mac_pcs_an_restart(pl); |
| return 0; |
| } |
| |
| phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, |
| phylink_an_mode_str(pl->cur_link_an_mode), |
| phy_modes(pl->link_config.interface), |
| __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, |
| pl->link_config.pause); |
| |
| /* Modern PCS-based method; update the advert at the PCS, and |
| * restart negotiation if the pcs_config() helper indicates that |
| * the programmed advertisement has changed. |
| */ |
| ret = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode, |
| pl->link_config.interface, |
| pl->link_config.advertising, |
| !!(pl->link_config.pause & MLO_PAUSE_AN)); |
| if (ret < 0) |
| return ret; |
| |
| if (ret > 0) |
| phylink_mac_pcs_an_restart(pl); |
| |
| return 0; |
| } |
| |
| static void phylink_mac_pcs_get_state(struct phylink *pl, |
| struct phylink_link_state *state) |
| { |
| linkmode_copy(state->advertising, pl->link_config.advertising); |
| linkmode_zero(state->lp_advertising); |
| state->interface = pl->link_config.interface; |
| state->an_enabled = pl->link_config.an_enabled; |
| if (state->an_enabled) { |
| state->speed = SPEED_UNKNOWN; |
| state->duplex = DUPLEX_UNKNOWN; |
| state->pause = MLO_PAUSE_NONE; |
| } else { |
| state->speed = pl->link_config.speed; |
| state->duplex = pl->link_config.duplex; |
| state->pause = pl->link_config.pause; |
| } |
| state->an_complete = 0; |
| state->link = 1; |
| |
| if (pl->pcs_ops) |
| pl->pcs_ops->pcs_get_state(pl->pcs, state); |
| else if (pl->mac_ops->mac_pcs_get_state && |
| pl->config->legacy_pre_march2020) |
| pl->mac_ops->mac_pcs_get_state(pl->config, state); |
| else |
| state->link = 0; |
| } |
| |
| /* The fixed state is... fixed except for the link state, |
| * which may be determined by a GPIO or a callback. |
| */ |
| static void phylink_get_fixed_state(struct phylink *pl, |
| struct phylink_link_state *state) |
| { |
| *state = pl->link_config; |
| if (pl->config->get_fixed_state) |
| pl->config->get_fixed_state(pl->config, state); |
| else if (pl->link_gpio) |
| state->link = !!gpiod_get_value_cansleep(pl->link_gpio); |
| |
| phylink_resolve_flow(state); |
| } |
| |
| static void phylink_mac_initial_config(struct phylink *pl, bool force_restart) |
| { |
| struct phylink_link_state link_state; |
| |
| switch (pl->cur_link_an_mode) { |
| case MLO_AN_PHY: |
| link_state = pl->phy_state; |
| break; |
| |
| case MLO_AN_FIXED: |
| phylink_get_fixed_state(pl, &link_state); |
| break; |
| |
| case MLO_AN_INBAND: |
| link_state = pl->link_config; |
| if (link_state.interface == PHY_INTERFACE_MODE_SGMII) |
| link_state.pause = MLO_PAUSE_NONE; |
| break; |
| |
| default: /* can't happen */ |
| return; |
| } |
| |
| link_state.link = false; |
| |
| phylink_apply_manual_flow(pl, &link_state); |
| phylink_major_config(pl, force_restart, &link_state); |
| } |
| |
| static const char *phylink_pause_to_str(int pause) |
| { |
| switch (pause & MLO_PAUSE_TXRX_MASK) { |
| case MLO_PAUSE_TX | MLO_PAUSE_RX: |
| return "rx/tx"; |
| case MLO_PAUSE_TX: |
| return "tx"; |
| case MLO_PAUSE_RX: |
| return "rx"; |
| default: |
| return "off"; |
| } |
| } |
| |
| static void phylink_link_up(struct phylink *pl, |
| struct phylink_link_state link_state) |
| { |
| struct net_device *ndev = pl->netdev; |
| |
| 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 && pl->config->legacy_pre_march2020) { |
| /* The interface remains unchanged, only the speed, |
| * duplex or pause settings have changed. Call the |
| * old mac_config() method to configure the MAC/PCS |
| * only if we do not have a legacy MAC driver. |
| */ |
| phylink_mac_config(pl, &link_state); |
| } |
| } |
| |
| if (link_state.link != cur_link_state) { |
| pl->old_link_state = link_state.link; |
| if (!link_state.link) |
| phylink_link_down(pl); |
| else |
| phylink_link_up(pl, link_state); |
| } |
| if (!link_state.link && retrigger) { |
| pl->mac_link_dropped = false; |
| queue_work(system_power_efficient_wq, &pl->resolve); |
| } |
| mutex_unlock(&pl->state_mutex); |
| } |
| |
| static void phylink_run_resolve(struct phylink *pl) |
| { |
| if (!pl->phylink_disable_state) |
| queue_work(system_power_efficient_wq, &pl->resolve); |
| } |
| |
| static void phylink_run_resolve_and_disable(struct phylink *pl, int bit) |
| { |
| unsigned long state = pl->phylink_disable_state; |
| |
| set_bit(bit, &pl->phylink_disable_state); |
| if (state == 0) { |
| queue_work(system_power_efficient_wq, &pl->resolve); |
| flush_work(&pl->resolve); |
| } |
| } |
| |
| static void phylink_enable_and_run_resolve(struct phylink *pl, int bit) |
| { |
| clear_bit(bit, &pl->phylink_disable_state); |
| phylink_run_resolve(pl); |
| } |
| |
| static void phylink_fixed_poll(struct timer_list *t) |
| { |
| struct phylink *pl = container_of(t, struct phylink, link_poll); |
| |
| mod_timer(t, jiffies + HZ); |
| |
| phylink_run_resolve(pl); |
| } |
| |
| static const struct sfp_upstream_ops sfp_phylink_ops; |
| |
| static int phylink_register_sfp(struct phylink *pl, |
| struct fwnode_handle *fwnode) |
| { |
| struct sfp_bus *bus; |
| int ret; |
| |
| if (!fwnode) |
| return 0; |
| |
| bus = sfp_bus_find_fwnode(fwnode); |
| if (IS_ERR(bus)) { |
| 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; |
| |
| /* Validate the supplied configuration */ |
| if (mac_ops->mac_select_pcs && |
| phy_interface_empty(config->supported_interfaces)) { |
| dev_err(config->dev, |
| "phylink: error: empty supported_interfaces but mac_select_pcs() method present\n"); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| pl = kzalloc(sizeof(*pl), GFP_KERNEL); |
| if (!pl) |
| return ERR_PTR(-ENOMEM); |
| |
| mutex_init(&pl->state_mutex); |
| INIT_WORK(&pl->resolve, phylink_resolve); |
| |
| pl->config = config; |
| if (config->type == PHYLINK_NETDEV) { |
| pl->netdev = to_net_dev(config->dev); |
| } else if (config->type == PHYLINK_DEV) { |
| pl->dev = config->dev; |
| } else { |
| kfree(pl); |
| return ERR_PTR(-EINVAL); |
| } |
| |
| pl->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(). |
| * If it is desired to dynamically change the PCS, then the preferred method |
| * is to use mac_select_pcs(), but it may also be called in mac_prepare() |
| * or mac_config(). |
| * |
| * 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; |
| |
| if (!pl->phylink_disable_state && |
| pl->cfg_link_an_mode == MLO_AN_INBAND) { |
| if (pl->config->pcs_poll || pcs->poll) |
| mod_timer(&pl->link_poll, jiffies + HZ); |
| else |
| del_timer(&pl->link_poll); |
| } |
| } |
| 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: %s setting supported %*pb advertising %*pb\n", |
| phy_modes(interface), |
| __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported, |
| __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising); |
| |
| if (phy_interrupt_is_valid(phy)) |
| phy_request_interrupt(phy); |
| |
| 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; |
| |
| /* Use PHY device/driver interface */ |
| if (pl->link_interface == PHY_INTERFACE_MODE_NA) { |
| pl->link_interface = phy_dev->interface; |
| pl->link_config.interface = pl->link_interface; |
| } |
| |
| ret = phy_attach_direct(pl->netdev, phy_dev, flags, |
| pl->link_interface); |
| if (ret) { |
| phy_device_free(phy_dev); |
| return ret; |
| } |
| |
| ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface); |
| if (ret) |
| phy_detach(phy_dev); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect); |
| |
| /** |
| * phylink_disconnect_phy() - disconnect any PHY attached to the phylink |
| * instance. |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * |
| * Disconnect any current PHY from the phylink instance described by @pl. |
| */ |
| void phylink_disconnect_phy(struct phylink *pl) |
| { |
| struct phy_device *phy; |
| |
| ASSERT_RTNL(); |
| |
| phy = pl->phydev; |
| if (phy) { |
| mutex_lock(&phy->lock); |
| mutex_lock(&pl->state_mutex); |
| pl->phydev = NULL; |
| mutex_unlock(&pl->state_mutex); |
| mutex_unlock(&phy->lock); |
| flush_work(&pl->resolve); |
| |
| phy_disconnect(phy); |
| } |
| } |
| EXPORT_SYMBOL_GPL(phylink_disconnect_phy); |
| |
| /** |
| * phylink_mac_change() - notify phylink of a change in MAC state |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * @up: indicates whether the link is currently up. |
| * |
| * The MAC driver should call this driver when the state of its link |
| * changes (eg, link failure, new negotiation results, etc.) |
| */ |
| void phylink_mac_change(struct phylink *pl, bool up) |
| { |
| if (!up) |
| pl->mac_link_dropped = true; |
| phylink_run_resolve(pl); |
| phylink_dbg(pl, "mac link %s\n", up ? "up" : "down"); |
| } |
| EXPORT_SYMBOL_GPL(phylink_mac_change); |
| |
| static irqreturn_t phylink_link_handler(int irq, void *data) |
| { |
| struct phylink *pl = data; |
| |
| phylink_run_resolve(pl); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * phylink_start() - start a phylink instance |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * |
| * Start the phylink instance specified by @pl, configuring the MAC for the |
| * desired link mode(s) and negotiation style. This should be called from the |
| * network device driver's &struct net_device_ops ndo_open() method. |
| */ |
| void phylink_start(struct phylink *pl) |
| { |
| bool poll = false; |
| |
| ASSERT_RTNL(); |
| |
| phylink_info(pl, "configuring for %s/%s link mode\n", |
| phylink_an_mode_str(pl->cur_link_an_mode), |
| phy_modes(pl->link_config.interface)); |
| |
| /* Always set the carrier off */ |
| if (pl->netdev) |
| netif_carrier_off(pl->netdev); |
| |
| /* Apply the link configuration to the MAC when starting. This allows |
| * a fixed-link to start with the correct parameters, and also |
| * ensures that we set the appropriate advertisement for Serdes links. |
| * |
| * Restart autonegotiation if using 802.3z to ensure that the link |
| * parameters are properly negotiated. This is necessary for DSA |
| * switches using 802.3z negotiation to ensure they see our modes. |
| */ |
| phylink_mac_initial_config(pl, true); |
| |
| phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_STOPPED); |
| |
| if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) { |
| int irq = gpiod_to_irq(pl->link_gpio); |
| |
| if (irq > 0) { |
| if (!request_irq(irq, phylink_link_handler, |
| IRQF_TRIGGER_RISING | |
| IRQF_TRIGGER_FALLING, |
| "netdev link", pl)) |
| pl->link_irq = irq; |
| else |
| irq = 0; |
| } |
| if (irq <= 0) |
| poll = true; |
| } |
| |
| switch (pl->cfg_link_an_mode) { |
| case MLO_AN_FIXED: |
| poll |= pl->config->poll_fixed_state; |
| break; |
| case MLO_AN_INBAND: |
| 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 */ |
| phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_MAC_WOL); |
| } else { |
| phylink_start(pl); |
| } |
| } |
| EXPORT_SYMBOL_GPL(phylink_resume); |
| |
| /** |
| * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters |
| * |
| * Read the wake on lan parameters from the PHY attached to the phylink |
| * instance specified by @pl. If no PHY is currently attached, report no |
| * support for wake on lan. |
| */ |
| void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol) |
| { |
| ASSERT_RTNL(); |
| |
| wol->supported = 0; |
| wol->wolopts = 0; |
| |
| if (pl->phydev) |
| phy_ethtool_get_wol(pl->phydev, wol); |
| } |
| EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol); |
| |
| /** |
| * phylink_ethtool_set_wol() - set wake on lan parameters |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters |
| * |
| * Set the wake on lan parameters for the PHY attached to the phylink |
| * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP |
| * error. |
| * |
| * Returns zero on success or negative errno code. |
| */ |
| int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol) |
| { |
| int ret = -EOPNOTSUPP; |
| |
| ASSERT_RTNL(); |
| |
| if (pl->phydev) |
| ret = phy_ethtool_set_wol(pl->phydev, wol); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol); |
| |
| static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b) |
| { |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(mask); |
| |
| linkmode_zero(mask); |
| phylink_set_port_modes(mask); |
| |
| linkmode_and(dst, dst, mask); |
| linkmode_or(dst, dst, b); |
| } |
| |
| static void phylink_get_ksettings(const struct phylink_link_state *state, |
| struct ethtool_link_ksettings *kset) |
| { |
| phylink_merge_link_mode(kset->link_modes.advertising, state->advertising); |
| linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising); |
| kset->base.speed = state->speed; |
| kset->base.duplex = state->duplex; |
| kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE : |
| AUTONEG_DISABLE; |
| } |
| |
| /** |
| * phylink_ethtool_ksettings_get() - get the current link settings |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings |
| * |
| * Read the current link settings for the phylink instance specified by @pl. |
| * This will be the link settings read from the MAC, PHY or fixed link |
| * settings depending on the current negotiation mode. |
| */ |
| int phylink_ethtool_ksettings_get(struct phylink *pl, |
| struct ethtool_link_ksettings *kset) |
| { |
| struct phylink_link_state link_state; |
| |
| ASSERT_RTNL(); |
| |
| if (pl->phydev) |
| phy_ethtool_ksettings_get(pl->phydev, kset); |
| else |
| kset->base.port = pl->link_port; |
| |
| linkmode_copy(kset->link_modes.supported, pl->supported); |
| |
| switch (pl->cur_link_an_mode) { |
| case MLO_AN_FIXED: |
| /* We are using fixed settings. Report these as the |
| * current link settings - and note that these also |
| * represent the supported speeds/duplex/pause modes. |
| */ |
| phylink_get_fixed_state(pl, &link_state); |
| phylink_get_ksettings(&link_state, kset); |
| break; |
| |
| case MLO_AN_INBAND: |
| /* If there is a phy attached, then use the reported |
| * settings from the phy with no modification. |
| */ |
| if (pl->phydev) |
| break; |
| |
| phylink_mac_pcs_get_state(pl, &link_state); |
| |
| /* The MAC is reporting the link results from its own PCS |
| * layer via in-band status. Report these as the current |
| * link settings. |
| */ |
| phylink_get_ksettings(&link_state, kset); |
| break; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get); |
| |
| /** |
| * phylink_ethtool_ksettings_set() - set the link settings |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes |
| */ |
| int phylink_ethtool_ksettings_set(struct phylink *pl, |
| const struct ethtool_link_ksettings *kset) |
| { |
| __ETHTOOL_DECLARE_LINK_MODE_MASK(support); |
| struct phylink_link_state config; |
| const struct phy_setting *s; |
| |
| ASSERT_RTNL(); |
| |
| if (pl->phydev) { |
| /* We can rely on phylib for this update; we also do not need |
| * to update the pl->link_config settings: |
| * - the configuration returned via ksettings_get() will come |
| * from phylib whenever a PHY is present. |
| * - link_config.interface will be updated by the PHY calling |
| * back via phylink_phy_change() and a subsequent resolve. |
| * - initial link configuration for PHY mode comes from the |
| * last phy state updated via phylink_phy_change(). |
| * - other configuration changes (e.g. pause modes) are |
| * performed directly via phylib. |
| * - if in in-band mode with a PHY, the link configuration |
| * is passed on the link from the PHY, and all of |
| * link_config.{speed,duplex,an_enabled,pause} are not used. |
| * - the only possible use would be link_config.advertising |
| * pause modes when in 1000base-X mode with a PHY, but in |
| * the presence of a PHY, this should not be changed as that |
| * should be determined from the media side advertisement. |
| */ |
| return phy_ethtool_ksettings_set(pl->phydev, kset); |
| } |
| |
| config = pl->link_config; |
| |
| /* Mask out unsupported advertisements */ |
| linkmode_and(config.advertising, kset->link_modes.advertising, |
| pl->supported); |
| |
| /* FIXME: should we reject autoneg if phy/mac does not support it? */ |
| switch (kset->base.autoneg) { |
| case AUTONEG_DISABLE: |
| /* Autonegotiation disabled, select a suitable speed and |
| * duplex. |
| */ |
| s = phy_lookup_setting(kset->base.speed, kset->base.duplex, |
| pl->supported, false); |
| if (!s) |
| return -EINVAL; |
| |
| /* If we have a fixed link, refuse to change link parameters. |
| * If the link parameters match, accept them but do nothing. |
| */ |
| if (pl->cur_link_an_mode == MLO_AN_FIXED) { |
| if (s->speed != pl->link_config.speed || |
| s->duplex != pl->link_config.duplex) |
| return -EINVAL; |
| return 0; |
| } |
| |
| config.speed = s->speed; |
| config.duplex = s->duplex; |
| break; |
| |
| case AUTONEG_ENABLE: |
| /* If we have a fixed link, allow autonegotiation (since that |
| * is our default case) but do not allow the advertisement to |
| * be changed. If the advertisement matches, simply return. |
| */ |
| if (pl->cur_link_an_mode == MLO_AN_FIXED) { |
| if (!linkmode_equal(config.advertising, |
| pl->link_config.advertising)) |
| return -EINVAL; |
| return 0; |
| } |
| |
| config.speed = SPEED_UNKNOWN; |
| config.duplex = DUPLEX_UNKNOWN; |
| break; |
| |
| default: |
| return -EINVAL; |
| } |
| |
| /* We have ruled out the case with a PHY attached, and the |
| * fixed-link cases. All that is left are in-band links. |
| */ |
| config.an_enabled = kset->base.autoneg == AUTONEG_ENABLE; |
| linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising, |
| config.an_enabled); |
| |
| /* If this link is with an SFP, ensure that changes to advertised modes |
| * also cause the associated interface to be selected such that the |
| * link can be configured correctly. |
| */ |
| if (pl->sfp_bus) { |
| config.interface = sfp_select_interface(pl->sfp_bus, |
| config.advertising); |
| if (config.interface == PHY_INTERFACE_MODE_NA) { |
| phylink_err(pl, |
| "selection of interface failed, advertisement %*pb\n", |
| __ETHTOOL_LINK_MODE_MASK_NBITS, |
| config.advertising); |
| return -EINVAL; |
| } |
| |
| /* Revalidate with the selected interface */ |
| linkmode_copy(support, pl->supported); |
| if (phylink_validate(pl, support, &config)) { |
| phylink_err(pl, "validation of %s/%s with support %*pb failed\n", |
| phylink_an_mode_str(pl->cur_link_an_mode), |
| phy_modes(config.interface), |
| __ETHTOOL_LINK_MODE_MASK_NBITS, support); |
| return -EINVAL; |
| } |
| } else { |
| /* Validate without changing the current supported mask. */ |
| linkmode_copy(support, pl->supported); |
| if (phylink_validate(pl, support, &config)) |
| return -EINVAL; |
| } |
| |
| /* If autonegotiation is enabled, we must have an advertisement */ |
| if (config.an_enabled && phylink_is_empty_linkmode(config.advertising)) |
| return -EINVAL; |
| |
| mutex_lock(&pl->state_mutex); |
| pl->link_config.speed = config.speed; |
| pl->link_config.duplex = config.duplex; |
| pl->link_config.an_enabled = config.an_enabled; |
| |
| if (pl->link_config.interface != config.interface) { |
| /* The interface changed, e.g. 1000base-X <-> 2500base-X */ |
| /* We need to force the link down, then change the interface */ |
| if (pl->old_link_state) { |
| phylink_link_down(pl); |
| pl->old_link_state = false; |
| } |
| if (!test_bit(PHYLINK_DISABLE_STOPPED, |
| &pl->phylink_disable_state)) |
| phylink_major_config(pl, false, &config); |
| pl->link_config.interface = config.interface; |
| linkmode_copy(pl->link_config.advertising, config.advertising); |
| } else if (!linkmode_equal(pl->link_config.advertising, |
| config.advertising)) { |
| linkmode_copy(pl->link_config.advertising, config.advertising); |
| phylink_change_inband_advert(pl); |
| } |
| mutex_unlock(&pl->state_mutex); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set); |
| |
| /** |
| * phylink_ethtool_nway_reset() - restart negotiation |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * |
| * Restart negotiation for the phylink instance specified by @pl. This will |
| * cause any attached phy to restart negotiation with the link partner, and |
| * if the MAC is in a BaseX mode, the MAC will also be requested to restart |
| * negotiation. |
| * |
| * Returns zero on success, or negative error code. |
| */ |
| int phylink_ethtool_nway_reset(struct phylink *pl) |
| { |
| int ret = 0; |
| |
| ASSERT_RTNL(); |
| |
| if (pl->phydev) |
| ret = phy_restart_aneg(pl->phydev); |
| phylink_mac_pcs_an_restart(pl); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset); |
| |
| /** |
| * phylink_ethtool_get_pauseparam() - get the current pause parameters |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * @pause: a pointer to a &struct ethtool_pauseparam |
| */ |
| void phylink_ethtool_get_pauseparam(struct phylink *pl, |
| struct ethtool_pauseparam *pause) |
| { |
| ASSERT_RTNL(); |
| |
| pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN); |
| pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX); |
| pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX); |
| } |
| EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam); |
| |
| /** |
| * phylink_ethtool_set_pauseparam() - set the current pause parameters |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * @pause: a pointer to a &struct ethtool_pauseparam |
| */ |
| int phylink_ethtool_set_pauseparam(struct phylink *pl, |
| struct ethtool_pauseparam *pause) |
| { |
| struct phylink_link_state *config = &pl->link_config; |
| bool manual_changed; |
| int pause_state; |
| |
| ASSERT_RTNL(); |
| |
| if (pl->cur_link_an_mode == MLO_AN_FIXED) |
| return -EOPNOTSUPP; |
| |
| if (!phylink_test(pl->supported, Pause) && |
| !phylink_test(pl->supported, Asym_Pause)) |
| return -EOPNOTSUPP; |
| |
| if (!phylink_test(pl->supported, Asym_Pause) && |
| pause->rx_pause != pause->tx_pause) |
| return -EINVAL; |
| |
| pause_state = 0; |
| if (pause->autoneg) |
| pause_state |= MLO_PAUSE_AN; |
| if (pause->rx_pause) |
| pause_state |= MLO_PAUSE_RX; |
| if (pause->tx_pause) |
| pause_state |= MLO_PAUSE_TX; |
| |
| mutex_lock(&pl->state_mutex); |
| /* |
| * See the comments for linkmode_set_pause(), wrt the deficiencies |
| * with the current implementation. A solution to this issue would |
| * be: |
| * ethtool Local device |
| * rx tx Pause AsymDir |
| * 0 0 0 0 |
| * 1 0 1 1 |
| * 0 1 0 1 |
| * 1 1 1 1 |
| * and then use the ethtool rx/tx enablement status to mask the |
| * rx/tx pause resolution. |
| */ |
| linkmode_set_pause(config->advertising, pause->tx_pause, |
| pause->rx_pause); |
| |
| manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN || |
| (!(pause_state & MLO_PAUSE_AN) && |
| (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK); |
| |
| config->pause = pause_state; |
| |
| /* Update our in-band advertisement, triggering a renegotiation if |
| * the advertisement changed. |
| */ |
| if (!pl->phydev) |
| phylink_change_inband_advert(pl); |
| |
| mutex_unlock(&pl->state_mutex); |
| |
| /* If we have a PHY, a change of the pause frame advertisement will |
| * cause phylib to renegotiate (if AN is enabled) which will in turn |
| * call our phylink_phy_change() and trigger a resolve. Note that |
| * we can't hold our state mutex while calling phy_set_asym_pause(). |
| */ |
| if (pl->phydev) |
| phy_set_asym_pause(pl->phydev, pause->rx_pause, |
| pause->tx_pause); |
| |
| /* If the manual pause settings changed, make sure we trigger a |
| * resolve to update their state; we can not guarantee that the |
| * link will cycle. |
| */ |
| if (manual_changed) { |
| pl->mac_link_dropped = true; |
| phylink_run_resolve(pl); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam); |
| |
| /** |
| * phylink_get_eee_err() - read the energy efficient ethernet error |
| * counter |
| * @pl: a pointer to a &struct phylink returned from phylink_create(). |
| * |
| * Read the Energy Efficient Ethernet error counter from the PHY associated |
| * with the phylink instance specified by @pl. |
| * |
| * Returns positive error counter value, or negative error code. |
| */ |
| int phylink_get_eee_err(struct phylink *pl) |
| { |
| int ret = 0; |
| |
| ASSERT_RTNL(); |
| |
| if (pl->phydev) |
| ret = phy_get_eee_err(pl->phydev); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(phylink_get_eee_err); |
| |
| /** |
| * phylink_init_eee() - init and check the EEE features |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * @clk_stop_enable: allow PHY to stop receive clock |
| * |
| * Must be called either with RTNL held or within mac_link_up() |
| */ |
| int phylink_init_eee(struct phylink *pl, bool clk_stop_enable) |
| { |
| int ret = -EOPNOTSUPP; |
| |
| if (pl->phydev) |
| ret = phy_init_eee(pl->phydev, clk_stop_enable); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(phylink_init_eee); |
| |
| /** |
| * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * @eee: a pointer to a &struct ethtool_eee for the read parameters |
| */ |
| int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee) |
| { |
| int ret = -EOPNOTSUPP; |
| |
| ASSERT_RTNL(); |
| |
| if (pl->phydev) |
| ret = phy_ethtool_get_eee(pl->phydev, eee); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee); |
| |
| /** |
| * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters |
| * @pl: a pointer to a &struct phylink returned from phylink_create() |
| * @eee: a pointer to a &struct ethtool_eee for the desired parameters |
| */ |
| int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee) |
| { |
| int ret = -EOPNOTSUPP; |
| |
| ASSERT_RTNL(); |
| |
| if (pl->phydev) |
| ret = phy_ethtool_set_eee(pl->phydev, eee); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee); |
| |
| /* This emulates MII registers for a fixed-mode phy operating as per the |
| * passed in state. "aneg" defines if we report negotiation is possible. |
| * |
| * FIXME: should deal with negotiation state too. |
| */ |
| static int phylink_mii_emul_read(unsigned int reg, |
| struct phylink_link_state *state) |
| { |
| struct fixed_phy_status fs; |
| unsigned long *lpa = state->lp_advertising; |
| int val; |
| |
| fs.link = state->link; |
| fs.speed = state->speed; |
| fs.duplex = state->duplex; |
| fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa); |
| fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa); |
| |
| val = swphy_read_reg(reg, &fs); |
| if (reg == MII_BMSR) { |
| if (!state->an_complete) |
| val &= ~BMSR_ANEGCOMPLETE; |
| } |
| return val; |
| } |
| |
| static int phylink_phy_read(struct phylink *pl, unsigned int phy_id, |
| unsigned int reg) |
| { |
| struct phy_device *phydev = pl->phydev; |
| int prtad, devad; |
| |
| if (mdio_phy_id_is_c45(phy_id)) { |
| prtad = mdio_phy_id_prtad(phy_id); |
| devad = mdio_phy_id_devad(phy_id); |
| 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(); |
| |
| phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_LINK); |
| } |
| |
| /* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII |
| * or 802.3z control word, so inband will not work. |
| */ |
| static bool phylink_phy_no_inband(struct phy_device *phy) |
| { |
| return phy->is_c45 && |
| (phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150; |
| } |
| |
| static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) |
| { |
| struct phylink *pl = upstream; |
| phy_interface_t interface; |
| u8 mode; |
| int ret; |
| |
| /* |
| * This is the new way of dealing with flow control for PHYs, |
| * as described by Timur Tabi in commit 529ed1275263 ("net: phy: |
| * phy drivers should not set SUPPORTED_[Asym_]Pause") except |
| * using our validate call to the MAC, we rely upon the MAC |
| * clearing the bits from both supported and advertising fields. |
| */ |
| phy_support_asym_pause(phy); |
| |
| if (phylink_phy_no_inband(phy)) |
| mode = MLO_AN_PHY; |
| else |
| mode = MLO_AN_INBAND; |
| |
| /* 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_decode_state() - Decode MAC PCS state from MII registers |
| * @state: a pointer to a &struct phylink_link_state. |
| * @bmsr: The value of the %MII_BMSR register |
| * @lpa: The value of the %MII_LPA register |
| * |
| * Helper for MAC PCS supporting the 802.3 clause 22 register set for |
| * clause 37 negotiation and/or SGMII control. |
| * |
| * Parse the Clause 37 or Cisco SGMII link partner negotiation word into |
| * the phylink @state structure. This is suitable to be used for implementing |
| * the mac_pcs_get_state() member of the struct phylink_mac_ops structure if |
| * accessing @bmsr and @lpa cannot be done with MDIO directly. |
| */ |
| void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state, |
| u16 bmsr, u16 lpa) |
| { |
| state->link = !!(bmsr & BMSR_LSTATUS); |
| state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); |
| /* If there is no link or autonegotiation is disabled, the LP advertisement |
| * data is not meaningful, so don't go any further. |
| */ |
| if (!state->link || !state->an_enabled) |
| return; |
| |
| switch (state->interface) { |
| case PHY_INTERFACE_MODE_1000BASEX: |
| phylink_decode_c37_word(state, lpa, SPEED_1000); |
| break; |
| |
| case PHY_INTERFACE_MODE_2500BASEX: |
| phylink_decode_c37_word(state, lpa, SPEED_2500); |
| break; |
| |
| case PHY_INTERFACE_MODE_SGMII: |
| case PHY_INTERFACE_MODE_QSGMII: |
| phylink_decode_sgmii_word(state, lpa); |
| break; |
| |
| default: |
| state->link = false; |
| break; |
| } |
| } |
| EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_decode_state); |
| |
| /** |
| * phylink_mii_c22_pcs_get_state() - read the MAC PCS state |
| * @pcs: a pointer to a &struct mdio_device. |
| * @state: a pointer to a &struct phylink_link_state. |
| * |
| * Helper for MAC PCS supporting the 802.3 clause 22 register set for |
| * clause 37 negotiation and/or SGMII control. |
| * |
| * Read the MAC PCS state from the MII device configured in @config and |
| * parse the Clause 37 or Cisco SGMII link partner negotiation word into |
| * the phylink @state structure. This is suitable to be directly plugged |
| * into the mac_pcs_get_state() member of the struct phylink_mac_ops |
| * structure. |
| */ |
| void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, |
| struct phylink_link_state *state) |
| { |
| int bmsr, lpa; |
| |
| bmsr = mdiodev_read(pcs, MII_BMSR); |
| lpa = mdiodev_read(pcs, MII_LPA); |
| if (bmsr < 0 || lpa < 0) { |
| state->link = false; |
| return; |
| } |
| |
| phylink_mii_c22_pcs_decode_state(state, bmsr, lpa); |
| } |
| EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state); |
| |
| /** |
| * phylink_mii_c22_pcs_encode_advertisement() - configure the clause 37 PCS |
| * advertisement |
| * @interface: the PHY interface mode being configured |
| * @advertising: the ethtool advertisement mask |
| * |
| * Helper for MAC PCS supporting the 802.3 clause 22 register set for |
| * clause 37 negotiation and/or SGMII control. |
| * |
| * Encode the clause 37 PCS advertisement as specified by @interface and |
| * @advertising. |
| * |
| * Return: The new value for @adv, or ``-EINVAL`` if it should not be changed. |
| */ |
| int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface, |
| const unsigned long *advertising) |
| { |
| u16 adv; |
| |
| switch (interface) { |
| case PHY_INTERFACE_MODE_1000BASEX: |
| case PHY_INTERFACE_MODE_2500BASEX: |
| adv = ADVERTISE_1000XFULL; |
| if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, |
| advertising)) |
| adv |= ADVERTISE_1000XPAUSE; |
| if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, |
| advertising)) |
| adv |= ADVERTISE_1000XPSE_ASYM; |
| return adv; |
| case PHY_INTERFACE_MODE_SGMII: |
| return 0x0001; |
| default: |
| /* Nothing to do for other modes */ |
| return -EINVAL; |
| } |
| } |
| EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_encode_advertisement); |
| |
| /** |
| * phylink_mii_c22_pcs_config() - configure clause 22 PCS |
| * @pcs: a pointer to a &struct mdio_device. |
| * @mode: link autonegotiation mode |
| * @interface: the PHY interface mode being configured |
| * @advertising: the ethtool advertisement mask |
| * |
| * Configure a Clause 22 PCS PHY with the appropriate negotiation |
| * parameters for the @mode, @interface and @advertising parameters. |
| * Returns negative error number on failure, zero if the advertisement |
| * has not changed, or positive if there is a change. |
| */ |
| int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode, |
| phy_interface_t interface, |
| const unsigned long *advertising) |
| { |
| bool changed = 0; |
| u16 bmcr; |
| int ret, adv; |
| |
| adv = phylink_mii_c22_pcs_encode_advertisement(interface, advertising); |
| if (adv >= 0) { |
| ret = mdiobus_modify_changed(pcs->bus, pcs->addr, |
| MII_ADVERTISE, 0xffff, adv); |
| if (ret < 0) |
| return ret; |
| changed = ret; |
| } |
| |
| /* Ensure ISOLATE bit is disabled */ |
| if (mode == MLO_AN_INBAND && |
| linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, advertising)) |
| bmcr = BMCR_ANENABLE; |
| else |
| bmcr = 0; |
| |
| ret = mdiodev_modify(pcs, MII_BMCR, BMCR_ANENABLE | BMCR_ISOLATE, bmcr); |
| if (ret < 0) |
| return ret; |
| |
| return changed; |
| } |
| EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); |
| |
| /** |
| * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation |
| * @pcs: a pointer to a &struct mdio_device. |
| * |
| * Helper for MAC PCS supporting the 802.3 clause 22 register set for |
| * clause 37 negotiation. |
| * |
| * Restart the clause 37 negotiation with the link partner. This is |
| * suitable to be directly plugged into the mac_pcs_get_state() member |
| * of the struct phylink_mac_ops structure. |
| */ |
| void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs) |
| { |
| int val = mdiodev_read(pcs, MII_BMCR); |
| |
| if (val >= 0) { |
| val |= BMCR_ANRESTART; |
| |
| mdiodev_write(pcs, MII_BMCR, val); |
| } |
| } |
| EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart); |
| |
| void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, |
| struct phylink_link_state *state) |
| { |
| struct mii_bus *bus = pcs->bus; |
| int addr = pcs->addr; |
| int stat; |
| |
| stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1); |
| if (stat < 0) { |
| state->link = false; |
| return; |
| } |
| |
| state->link = !!(stat & MDIO_STAT1_LSTATUS); |
| if (!state->link) |
| return; |
| |
| switch (state->interface) { |
| case PHY_INTERFACE_MODE_10GBASER: |
| state->speed = SPEED_10000; |
| state->duplex = DUPLEX_FULL; |
| break; |
| |
| default: |
| break; |
| } |
| } |
| EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state); |
| |
| MODULE_LICENSE("GPL v2"); |