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phylink.h
#ifndef NETDEV_PCS_H #define NETDEV_PCS_H #include <linux/phy.h> #include <linux/spinlock.h> #include <linux/workqueue.h> struct device_node; struct ethtool_cmd; struct fwnode_handle; struct net_device; struct phylink; enum { MLO_PAUSE_NONE, MLO_PAUSE_RX = BIT(0), MLO_PAUSE_TX = BIT(1), MLO_PAUSE_TXRX_MASK = MLO_PAUSE_TX | MLO_PAUSE_RX, MLO_PAUSE_AN = BIT(2), MLO_AN_PHY = 0, /* Conventional PHY */ MLO_AN_FIXED, /* Fixed-link mode */ MLO_AN_INBAND, /* In-band protocol */ /* PCS "negotiation" mode. * PHYLINK_PCS_NEG_NONE - protocol has no inband capability * PHYLINK_PCS_NEG_OUTBAND - some out of band or fixed link setting * PHYLINK_PCS_NEG_INBAND_DISABLED - inband mode disabled, e.g. * 1000base-X with autoneg off * PHYLINK_PCS_NEG_INBAND_ENABLED - inband mode enabled * Additionally, this can be tested using bitmasks: * PHYLINK_PCS_NEG_INBAND - inband mode selected * PHYLINK_PCS_NEG_ENABLED - negotiation mode enabled */ PHYLINK_PCS_NEG_NONE = 0, PHYLINK_PCS_NEG_ENABLED = BIT(4), PHYLINK_PCS_NEG_OUTBAND = BIT(5), PHYLINK_PCS_NEG_INBAND = BIT(6), PHYLINK_PCS_NEG_INBAND_DISABLED = PHYLINK_PCS_NEG_INBAND, PHYLINK_PCS_NEG_INBAND_ENABLED = PHYLINK_PCS_NEG_INBAND | PHYLINK_PCS_NEG_ENABLED, /* MAC_SYM_PAUSE and MAC_ASYM_PAUSE are used when configuring our * autonegotiation advertisement. They correspond to the PAUSE and * ASM_DIR bits defined by 802.3, respectively. * * The following table lists the values of tx_pause and rx_pause which * might be requested in mac_link_up. The exact values depend on either * the results of autonegotation (if MLO_PAUSE_AN is set) or user * configuration (if MLO_PAUSE_AN is not set). * * MAC_SYM_PAUSE MAC_ASYM_PAUSE MLO_PAUSE_AN tx_pause/rx_pause * ============= ============== ============ ================== * 0 0 0 0/0 * 0 0 1 0/0 * 0 1 0 0/0, 0/1, 1/0, 1/1 * 0 1 1 0/0, 1/0 * 1 0 0 0/0, 1/1 * 1 0 1 0/0, 1/1 * 1 1 0 0/0, 0/1, 1/0, 1/1 * 1 1 1 0/0, 0/1, 1/1 * * If you set MAC_ASYM_PAUSE, the user may request any combination of * tx_pause and rx_pause. You do not have to support these * combinations. * * However, you should support combinations of tx_pause and rx_pause * which might be the result of autonegotation. For example, don't set * MAC_SYM_PAUSE unless your device can support tx_pause and rx_pause * at the same time. */ MAC_SYM_PAUSE = BIT(0), MAC_ASYM_PAUSE = BIT(1), MAC_10HD = BIT(2), MAC_10FD = BIT(3), MAC_10 = MAC_10HD | MAC_10FD, MAC_100HD = BIT(4), MAC_100FD = BIT(5), MAC_100 = MAC_100HD | MAC_100FD, MAC_1000HD = BIT(6), MAC_1000FD = BIT(7), MAC_1000 = MAC_1000HD | MAC_1000FD, MAC_2500FD = BIT(8), MAC_5000FD = BIT(9), MAC_10000FD = BIT(10), MAC_20000FD = BIT(11), MAC_25000FD = BIT(12), MAC_40000FD = BIT(13), MAC_50000FD = BIT(14), MAC_56000FD = BIT(15), MAC_100000FD = BIT(16), MAC_200000FD = BIT(17), MAC_400000FD = BIT(18), }; static inline bool phylink_autoneg_inband(unsigned int mode) { return mode == MLO_AN_INBAND; } /** * struct phylink_link_state - link state structure * @advertising: ethtool bitmask containing advertised link modes * @lp_advertising: ethtool bitmask containing link partner advertised link * modes * @interface: link &typedef phy_interface_t mode * @speed: link speed, one of the SPEED_* constants. * @duplex: link duplex mode, one of DUPLEX_* constants. * @pause: link pause state, described by MLO_PAUSE_* constants. * @rate_matching: rate matching being performed, one of the RATE_MATCH_* * constants. If rate matching is taking place, then the speed/duplex of * the medium link mode (@speed and @duplex) and the speed/duplex of the phy * interface mode (@interface) are different. * @link: true if the link is up. * @an_complete: true if autonegotiation has completed. */ struct phylink_link_state { __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising); __ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising); phy_interface_t interface; int speed; int duplex; int pause; int rate_matching; unsigned int link:1; unsigned int an_complete:1; }; enum phylink_op_type { PHYLINK_NETDEV = 0, PHYLINK_DEV, }; /** * struct phylink_config - PHYLINK configuration structure * @dev: a pointer to a struct device associated with the MAC * @type: operation type of PHYLINK instance * @poll_fixed_state: if true, starts link_poll, * if MAC link is at %MLO_AN_FIXED mode. * @mac_managed_pm: if true, indicate the MAC driver is responsible for PHY PM. * @ovr_an_inband: if true, override PCS to MLO_AN_INBAND * @get_fixed_state: callback to execute to determine the fixed link state, * if MAC link is at %MLO_AN_FIXED mode. * @supported_interfaces: bitmap describing which PHY_INTERFACE_MODE_xxx * are supported by the MAC/PCS. * @mac_capabilities: MAC pause/speed/duplex capabilities. */ struct phylink_config { struct device *dev; enum phylink_op_type type; bool poll_fixed_state; bool mac_managed_pm; bool ovr_an_inband; void (*get_fixed_state)(struct phylink_config *config, struct phylink_link_state *state); DECLARE_PHY_INTERFACE_MASK(supported_interfaces); unsigned long mac_capabilities; }; void phylink_limit_mac_speed(struct phylink_config *config, u32 max_speed); /** * struct phylink_mac_ops - MAC operations structure. * @mac_get_caps: Get MAC capabilities for interface mode. * @mac_select_pcs: Select a PCS for the interface mode. * @mac_prepare: prepare for a major reconfiguration of the interface. * @mac_config: configure the MAC for the selected mode and state. * @mac_finish: finish a major reconfiguration of the interface. * @mac_link_down: take the link down. * @mac_link_up: allow the link to come up. * * The individual methods are described more fully below. */ struct phylink_mac_ops { unsigned long (*mac_get_caps)(struct phylink_config *config, phy_interface_t interface); struct phylink_pcs *(*mac_select_pcs)(struct phylink_config *config, phy_interface_t interface); int (*mac_prepare)(struct phylink_config *config, unsigned int mode, phy_interface_t iface); void (*mac_config)(struct phylink_config *config, unsigned int mode, const struct phylink_link_state *state); int (*mac_finish)(struct phylink_config *config, unsigned int mode, phy_interface_t iface); void (*mac_link_down)(struct phylink_config *config, unsigned int mode, phy_interface_t interface); void (*mac_link_up)(struct phylink_config *config, struct phy_device *phy, unsigned int mode, phy_interface_t interface, int speed, int duplex, bool tx_pause, bool rx_pause); }; #if 0 /* For kernel-doc purposes only. */ /** * mac_get_caps: Get MAC capabilities for interface mode. * @config: a pointer to a &struct phylink_config. * @interface: PHY interface mode. * * Optional method. When not provided, config->mac_capabilities will be used. * When implemented, this returns the MAC capabilities for the specified * interface mode where there is some special handling required by the MAC * driver (e.g. not supporting half-duplex in certain interface modes.) */ unsigned long mac_get_caps(struct phylink_config *config, phy_interface_t interface); /** * mac_select_pcs: Select a PCS for the interface mode. * @config: a pointer to a &struct phylink_config. * @interface: PHY interface mode for PCS * * Return the &struct phylink_pcs for the specified interface mode, or * NULL if none is required, or an error pointer on error. * * This must not modify any state. It is used to query which PCS should * be used. Phylink will use this during validation to ensure that the * configuration is valid, and when setting a configuration to internally * set the PCS that will be used. */ struct phylink_pcs *mac_select_pcs(struct phylink_config *config, phy_interface_t interface); /** * mac_prepare() - prepare to change the PHY interface mode * @config: a pointer to a &struct phylink_config. * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND. * @iface: interface mode to switch to * * phylink will call this method at the beginning of a full initialisation * of the link, which includes changing the interface mode or at initial * startup time. It may be called for the current mode. The MAC driver * should perform whatever actions are required, e.g. disabling the * Serdes PHY. * * This will be the first call in the sequence: * - mac_prepare() * - mac_config() * - pcs_config() * - possible pcs_an_restart() * - mac_finish() * * Returns zero on success, or negative errno on failure which will be * reported to the kernel log. */ int mac_prepare(struct phylink_config *config, unsigned int mode, phy_interface_t iface); /** * mac_config() - configure the MAC for the selected mode and state * @config: a pointer to a &struct phylink_config. * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND. * @state: a pointer to a &struct phylink_link_state. * * Note - not all members of @state are valid. In particular, * @state->lp_advertising, @state->link, @state->an_complete are never * guaranteed to be correct, and so any mac_config() implementation must * never reference these fields. * * This will only be called to reconfigure the MAC for a "major" change in * e.g. interface mode. It will not be called for changes in speed, duplex * or pause modes or to change the in-band advertisement. * * In all negotiation modes, as defined by @mode, @state->pause indicates the * pause settings which should be applied as follows. If %MLO_PAUSE_AN is not * set, %MLO_PAUSE_TX and %MLO_PAUSE_RX indicate whether the MAC should send * pause frames and/or act on received pause frames respectively. Otherwise, * the results of in-band negotiation/status from the MAC PCS should be used * to control the MAC pause mode settings. * * The action performed depends on the currently selected mode: * * %MLO_AN_FIXED, %MLO_AN_PHY: * Configure for non-inband negotiation mode, where the link settings * are completely communicated via mac_link_up(). The physical link * protocol from the MAC is specified by @state->interface. * * @state->advertising may be used, but is not required. * * Older drivers (prior to the mac_link_up() change) may use @state->speed, * @state->duplex and @state->pause to configure the MAC, but this is * deprecated; such drivers should be converted to use mac_link_up(). * * Other members of @state must be ignored. * * Valid state members: interface, advertising. * Deprecated state members: speed, duplex, pause. * * %MLO_AN_INBAND: * place the link in an inband negotiation mode (such as 802.3z * 1000base-X or Cisco SGMII mode depending on the @state->interface * mode). In both cases, link state management (whether the link * is up or not) is performed by the MAC, and reported via the * pcs_get_state() callback. Changes in link state must be made * by calling phylink_mac_change(). * * Interface mode specific details are mentioned below. * * If in 802.3z mode, the link speed is fixed, dependent on the * @state->interface. Duplex and pause modes are negotiated via * the in-band configuration word. Advertised pause modes are set * according to the @state->an_enabled and @state->advertising * flags. Beware of MACs which only support full duplex at gigabit * and higher speeds. * * If in Cisco SGMII mode, the link speed and duplex mode are passed * in the serial bitstream 16-bit configuration word, and the MAC * should be configured to read these bits and acknowledge the * configuration word. Nothing is advertised by the MAC. The MAC is * responsible for reading the configuration word and configuring * itself accordingly. * * Valid state members: interface, an_enabled, pause, advertising. * * Implementations are expected to update the MAC to reflect the * requested settings - i.o.w., if nothing has changed between two * calls, no action is expected. If only flow control settings have * changed, flow control should be updated *without* taking the link * down. This "update" behaviour is critical to avoid bouncing the * link up status. */ void mac_config(struct phylink_config *config, unsigned int mode, const struct phylink_link_state *state); /** * mac_finish() - finish a to change the PHY interface mode * @config: a pointer to a &struct phylink_config. * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND. * @iface: interface mode to switch to * * phylink will call this if it called mac_prepare() to allow the MAC to * complete any necessary steps after the MAC and PCS have been configured * for the @mode and @iface. E.g. a MAC driver may wish to re-enable the * Serdes PHY here if it was previously disabled by mac_prepare(). * * Returns zero on success, or negative errno on failure which will be * reported to the kernel log. */ int mac_finish(struct phylink_config *config, unsigned int mode, phy_interface_t iface); /** * mac_link_down() - take the link down * @config: a pointer to a &struct phylink_config. * @mode: link autonegotiation mode * @interface: link &typedef phy_interface_t mode * * If @mode is not an in-band negotiation mode (as defined by * phylink_autoneg_inband()), force the link down and disable any * Energy Efficient Ethernet MAC configuration. Interface type * selection must be done in mac_config(). */ void mac_link_down(struct phylink_config *config, unsigned int mode, phy_interface_t interface); /** * mac_link_up() - allow the link to come up * @config: a pointer to a &struct phylink_config. * @phy: any attached phy * @mode: link autonegotiation mode * @interface: link &typedef phy_interface_t mode * @speed: link speed * @duplex: link duplex * @tx_pause: link transmit pause enablement status * @rx_pause: link receive pause enablement status * * Configure the MAC for an established link. * * @speed, @duplex, @tx_pause and @rx_pause indicate the finalised link * settings, and should be used to configure the MAC block appropriately * where these settings are not automatically conveyed from the PCS block, * or if in-band negotiation (as defined by phylink_autoneg_inband(@mode)) * is disabled. * * Note that when 802.3z in-band negotiation is in use, it is possible * that the user wishes to override the pause settings, and this should * be allowed when considering the implementation of this method. * * If in-band negotiation mode is disabled, allow the link to come up. If * @phy is non-%NULL, configure Energy Efficient Ethernet by calling * phy_init_eee() and perform appropriate MAC configuration for EEE. * Interface type selection must be done in mac_config(). */ void mac_link_up(struct phylink_config *config, struct phy_device *phy, unsigned int mode, phy_interface_t interface, int speed, int duplex, bool tx_pause, bool rx_pause); #endif struct phylink_pcs_ops; /** * struct phylink_pcs - PHYLINK PCS instance * @ops: a pointer to the &struct phylink_pcs_ops structure * @phylink: pointer to &struct phylink_config * @neg_mode: provide PCS neg mode via "mode" argument * @poll: poll the PCS for link changes * * This structure is designed to be embedded within the PCS private data, * and will be passed between phylink and the PCS. * * The @phylink member is private to phylink and must not be touched by * the PCS driver. */ struct phylink_pcs { const struct phylink_pcs_ops *ops; struct phylink *phylink; bool neg_mode; bool poll; }; /** * struct phylink_pcs_ops - MAC PCS operations structure. * @pcs_validate: validate the link configuration. * @pcs_enable: enable the PCS. * @pcs_disable: disable the PCS. * @pcs_pre_config: pre-mac_config method (for errata) * @pcs_post_config: post-mac_config method (for arrata) * @pcs_get_state: read the current MAC PCS link state from the hardware. * @pcs_config: configure the MAC PCS for the selected mode and state. * @pcs_an_restart: restart 802.3z BaseX autonegotiation. * @pcs_link_up: program the PCS for the resolved link configuration * (where necessary). */ struct phylink_pcs_ops { int (*pcs_validate)(struct phylink_pcs *pcs, unsigned long *supported, const struct phylink_link_state *state); int (*pcs_enable)(struct phylink_pcs *pcs); void (*pcs_disable)(struct phylink_pcs *pcs); void (*pcs_pre_config)(struct phylink_pcs *pcs, phy_interface_t interface); int (*pcs_post_config)(struct phylink_pcs *pcs, phy_interface_t interface); void (*pcs_get_state)(struct phylink_pcs *pcs, struct phylink_link_state *state); int (*pcs_config)(struct phylink_pcs *pcs, unsigned int neg_mode, phy_interface_t interface, const unsigned long *advertising, bool permit_pause_to_mac); void (*pcs_an_restart)(struct phylink_pcs *pcs); void (*pcs_link_up)(struct phylink_pcs *pcs, unsigned int neg_mode, phy_interface_t interface, int speed, int duplex); }; #if 0 /* For kernel-doc purposes only. */ /** * pcs_validate() - validate the link configuration. * @pcs: a pointer to a &struct phylink_pcs. * @supported: ethtool bitmask for supported link modes. * @state: a const pointer to a &struct phylink_link_state. * * Validate the interface mode, and advertising's autoneg bit, removing any * media ethtool link modes that would not be supportable from the supported * mask. Phylink will propagate the changes to the advertising mask. See the * &struct phylink_mac_ops validate() method. * * Returns -EINVAL if the interface mode/autoneg mode is not supported. * Returns non-zero positive if the link state can be supported. */ int pcs_validate(struct phylink_pcs *pcs, unsigned long *supported, const struct phylink_link_state *state); /** * pcs_enable() - enable the PCS. * @pcs: a pointer to a &struct phylink_pcs. */ int pcs_enable(struct phylink_pcs *pcs); /** * pcs_disable() - disable the PCS. * @pcs: a pointer to a &struct phylink_pcs. */ void pcs_disable(struct phylink_pcs *pcs); /** * pcs_get_state() - Read the current inband link state from the hardware * @pcs: a pointer to a &struct phylink_pcs. * @state: a pointer to a &struct phylink_link_state. * * Read the current inband link state from the MAC PCS, reporting the * current speed in @state->speed, duplex mode in @state->duplex, pause * mode in @state->pause using the %MLO_PAUSE_RX and %MLO_PAUSE_TX bits, * negotiation completion state in @state->an_complete, and link up state * in @state->link. If possible, @state->lp_advertising should also be * populated. * * When present, this overrides pcs_get_state() in &struct * phylink_pcs_ops. */ void pcs_get_state(struct phylink_pcs *pcs, struct phylink_link_state *state); /** * pcs_config() - Configure the PCS mode and advertisement * @pcs: a pointer to a &struct phylink_pcs. * @neg_mode: link negotiation mode (see below) * @interface: interface mode to be used * @advertising: adertisement ethtool link mode mask * @permit_pause_to_mac: permit forwarding pause resolution to MAC * * Configure the PCS for the operating mode, the interface mode, and set * the advertisement mask. @permit_pause_to_mac indicates whether the * hardware may forward the pause mode resolution to the MAC. * * When operating in %MLO_AN_INBAND, inband should always be enabled, * otherwise inband should be disabled. * * For SGMII, there is no advertisement from the MAC side, the PCS should * be programmed to acknowledge the inband word from the PHY. * * For 1000BASE-X, the advertisement should be programmed into the PCS. * * For most 10GBASE-R, there is no advertisement. * * The %neg_mode argument should be tested via the phylink_mode_*() family of * functions, or for PCS that set pcs->neg_mode true, should be tested * against the PHYLINK_PCS_NEG_* definitions. */ int pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, phy_interface_t interface, const unsigned long *advertising, bool permit_pause_to_mac); /** * pcs_an_restart() - restart 802.3z BaseX autonegotiation * @pcs: a pointer to a &struct phylink_pcs. * * When PCS ops are present, this overrides mac_an_restart() in &struct * phylink_mac_ops. */ void pcs_an_restart(struct phylink_pcs *pcs); /** * pcs_link_up() - program the PCS for the resolved link configuration * @pcs: a pointer to a &struct phylink_pcs. * @neg_mode: link negotiation mode (see below) * @interface: link &typedef phy_interface_t mode * @speed: link speed * @duplex: link duplex * * This call will be made just before mac_link_up() to inform the PCS of * the resolved link parameters. For example, a PCS operating in SGMII * mode without in-band AN needs to be manually configured for the link * and duplex setting. Otherwise, this should be a no-op. * * The %mode argument should be tested via the phylink_mode_*() family of * functions, or for PCS that set pcs->neg_mode true, should be tested * against the PHYLINK_PCS_NEG_* definitions. */ void pcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode, phy_interface_t interface, int speed, int duplex); #endif struct phylink *phylink_create(struct phylink_config *, const struct fwnode_handle *, phy_interface_t, const struct phylink_mac_ops *); void phylink_destroy(struct phylink *); bool phylink_expects_phy(struct phylink *pl); int phylink_connect_phy(struct phylink *, struct phy_device *); int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags); int phylink_fwnode_phy_connect(struct phylink *pl, const struct fwnode_handle *fwnode, u32 flags); void phylink_disconnect_phy(struct phylink *); void phylink_mac_change(struct phylink *, bool up); void phylink_pcs_change(struct phylink_pcs *, bool up); void phylink_start(struct phylink *); void phylink_stop(struct phylink *); void phylink_suspend(struct phylink *pl, bool mac_wol); void phylink_resume(struct phylink *pl); void phylink_ethtool_get_wol(struct phylink *, struct ethtool_wolinfo *); int phylink_ethtool_set_wol(struct phylink *, struct ethtool_wolinfo *); int phylink_ethtool_ksettings_get(struct phylink *, struct ethtool_link_ksettings *); int phylink_ethtool_ksettings_set(struct phylink *, const struct ethtool_link_ksettings *); int phylink_ethtool_nway_reset(struct phylink *); void phylink_ethtool_get_pauseparam(struct phylink *, struct ethtool_pauseparam *); int phylink_ethtool_set_pauseparam(struct phylink *, struct ethtool_pauseparam *); int phylink_get_eee_err(struct phylink *); int phylink_init_eee(struct phylink *, bool); int phylink_ethtool_get_eee(struct phylink *, struct ethtool_eee *); int phylink_ethtool_set_eee(struct phylink *, struct ethtool_eee *); int phylink_mii_ioctl(struct phylink *, struct ifreq *, int); int phylink_speed_down(struct phylink *pl, bool sync); int phylink_speed_up(struct phylink *pl); #define phylink_zero(bm) \ bitmap_zero(bm, __ETHTOOL_LINK_MODE_MASK_NBITS) #define __phylink_do_bit(op, bm, mode) \ op(ETHTOOL_LINK_MODE_ ## mode ## _BIT, bm) #define phylink_set(bm, mode) __phylink_do_bit(__set_bit, bm, mode) #define phylink_clear(bm, mode) __phylink_do_bit(__clear_bit, bm, mode) #define phylink_test(bm, mode) __phylink_do_bit(test_bit, bm, mode) void phylink_set_port_modes(unsigned long *bits); /** * phylink_get_link_timer_ns - return the PCS link timer value * @interface: link &typedef phy_interface_t mode * * Return the PCS link timer setting in nanoseconds for the PHY @interface * mode, or -EINVAL if not appropriate. */ static inline int phylink_get_link_timer_ns(phy_interface_t interface) { switch (interface) { case PHY_INTERFACE_MODE_SGMII: case PHY_INTERFACE_MODE_QSGMII: case PHY_INTERFACE_MODE_USXGMII: return 1600000; case PHY_INTERFACE_MODE_1000BASEX: case PHY_INTERFACE_MODE_2500BASEX: return 10000000; default: return -EINVAL; } } void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state, u16 bmsr, u16 lpa); void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, struct phylink_link_state *state); int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface, const unsigned long *advertising); int phylink_mii_c22_pcs_config(struct mdio_device *pcs, phy_interface_t interface, const unsigned long *advertising, unsigned int neg_mode); void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs); void phylink_resolve_c73(struct phylink_link_state *state); void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs, struct phylink_link_state *state); void phylink_decode_usxgmii_word(struct phylink_link_state *state, uint16_t lpa); #endif
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