515 lines
20 KiB
C
515 lines
20 KiB
C
#ifndef NETDEV_PCS_H
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#define NETDEV_PCS_H
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#include <linux/phy.h>
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#include <linux/spinlock.h>
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#include <linux/workqueue.h>
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struct device_node;
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struct ethtool_cmd;
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struct fwnode_handle;
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struct net_device;
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enum {
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MLO_PAUSE_NONE,
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MLO_PAUSE_RX = BIT(0),
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MLO_PAUSE_TX = BIT(1),
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MLO_PAUSE_TXRX_MASK = MLO_PAUSE_TX | MLO_PAUSE_RX,
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MLO_PAUSE_AN = BIT(2),
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MLO_AN_PHY = 0, /* Conventional PHY */
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MLO_AN_FIXED, /* Fixed-link mode */
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MLO_AN_INBAND, /* In-band protocol */
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};
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static inline bool phylink_autoneg_inband(unsigned int mode)
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{
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return mode == MLO_AN_INBAND;
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}
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/**
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* struct phylink_link_state - link state structure
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* @advertising: ethtool bitmask containing advertised link modes
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* @lp_advertising: ethtool bitmask containing link partner advertised link
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* modes
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* @interface: link &typedef phy_interface_t mode
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* @speed: link speed, one of the SPEED_* constants.
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* @duplex: link duplex mode, one of DUPLEX_* constants.
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* @pause: link pause state, described by MLO_PAUSE_* constants.
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* @link: true if the link is up.
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* @an_enabled: true if autonegotiation is enabled/desired.
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* @an_complete: true if autonegotiation has completed.
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*/
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struct phylink_link_state {
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__ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
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__ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising);
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phy_interface_t interface;
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int speed;
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int duplex;
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int pause;
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unsigned int link:1;
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unsigned int an_enabled:1;
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unsigned int an_complete:1;
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};
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enum phylink_op_type {
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PHYLINK_NETDEV = 0,
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PHYLINK_DEV,
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};
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/**
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* struct phylink_config - PHYLINK configuration structure
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* @dev: a pointer to a struct device associated with the MAC
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* @type: operation type of PHYLINK instance
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* @pcs_poll: MAC PCS cannot provide link change interrupt
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* @poll_fixed_state: if true, starts link_poll,
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* if MAC link is at %MLO_AN_FIXED mode.
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* @ovr_an_inband: if true, override PCS to MLO_AN_INBAND
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* @get_fixed_state: callback to execute to determine the fixed link state,
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* if MAC link is at %MLO_AN_FIXED mode.
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* @supported_interfaces: bitmap describing which PHY_INTERFACE_MODE_xxx
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* are supported by the MAC/PCS.
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*/
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struct phylink_config {
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struct device *dev;
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enum phylink_op_type type;
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bool pcs_poll;
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bool poll_fixed_state;
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bool ovr_an_inband;
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void (*get_fixed_state)(struct phylink_config *config,
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struct phylink_link_state *state);
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DECLARE_PHY_INTERFACE_MASK(supported_interfaces);
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};
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/**
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* struct phylink_mac_ops - MAC operations structure.
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* @validate: Validate and update the link configuration.
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* @mac_pcs_get_state: Read the current link state from the hardware.
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* @mac_prepare: prepare for a major reconfiguration of the interface.
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* @mac_config: configure the MAC for the selected mode and state.
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* @mac_finish: finish a major reconfiguration of the interface.
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* @mac_an_restart: restart 802.3z BaseX autonegotiation.
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* @mac_link_down: take the link down.
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* @mac_link_up: allow the link to come up.
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*
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* The individual methods are described more fully below.
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*/
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struct phylink_mac_ops {
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void (*validate)(struct phylink_config *config,
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unsigned long *supported,
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struct phylink_link_state *state);
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void (*mac_pcs_get_state)(struct phylink_config *config,
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struct phylink_link_state *state);
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int (*mac_prepare)(struct phylink_config *config, unsigned int mode,
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phy_interface_t iface);
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void (*mac_config)(struct phylink_config *config, unsigned int mode,
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const struct phylink_link_state *state);
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int (*mac_finish)(struct phylink_config *config, unsigned int mode,
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phy_interface_t iface);
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void (*mac_an_restart)(struct phylink_config *config);
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void (*mac_link_down)(struct phylink_config *config, unsigned int mode,
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phy_interface_t interface);
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void (*mac_link_up)(struct phylink_config *config,
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struct phy_device *phy, unsigned int mode,
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phy_interface_t interface, int speed, int duplex,
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bool tx_pause, bool rx_pause);
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};
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#if 0 /* For kernel-doc purposes only. */
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/**
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* validate - Validate and update the link configuration
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* @config: a pointer to a &struct phylink_config.
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* @supported: ethtool bitmask for supported link modes.
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* @state: a pointer to a &struct phylink_link_state.
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*
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* Clear bits in the @supported and @state->advertising masks that
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* are not supportable by the MAC.
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*
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* Note that the PHY may be able to transform from one connection
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* technology to another, so, eg, don't clear 1000BaseX just
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* because the MAC is unable to BaseX mode. This is more about
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* clearing unsupported speeds and duplex settings. The port modes
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* should not be cleared; phylink_set_port_modes() will help with this.
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*
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* If the @state->interface mode is %PHY_INTERFACE_MODE_1000BASEX
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* or %PHY_INTERFACE_MODE_2500BASEX, select the appropriate mode
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* based on @state->advertising and/or @state->speed and update
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* @state->interface accordingly. See phylink_helper_basex_speed().
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*
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* When @config->supported_interfaces has been set, phylink will iterate
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* over the supported interfaces to determine the full capability of the
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* MAC. The validation function must not print errors if @state->interface
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* is set to an unexpected value.
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*
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* When @config->supported_interfaces is empty, phylink will call this
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* function with @state->interface set to %PHY_INTERFACE_MODE_NA, and
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* expects the MAC driver to return all supported link modes.
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*
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* If the @state->interface mode is not supported, then the @supported
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* mask must be cleared.
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*/
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void validate(struct phylink_config *config, unsigned long *supported,
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struct phylink_link_state *state);
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/**
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* mac_pcs_get_state() - Read the current inband link state from the hardware
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* @config: a pointer to a &struct phylink_config.
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* @state: a pointer to a &struct phylink_link_state.
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*
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* Read the current inband link state from the MAC PCS, reporting the
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* current speed in @state->speed, duplex mode in @state->duplex, pause
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* mode in @state->pause using the %MLO_PAUSE_RX and %MLO_PAUSE_TX bits,
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* negotiation completion state in @state->an_complete, and link up state
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* in @state->link. If possible, @state->lp_advertising should also be
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* populated.
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*/
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void mac_pcs_get_state(struct phylink_config *config,
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struct phylink_link_state *state);
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/**
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* mac_prepare() - prepare to change the PHY interface mode
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* @config: a pointer to a &struct phylink_config.
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* @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
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* @iface: interface mode to switch to
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*
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* phylink will call this method at the beginning of a full initialisation
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* of the link, which includes changing the interface mode or at initial
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* startup time. It may be called for the current mode. The MAC driver
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* should perform whatever actions are required, e.g. disabling the
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* Serdes PHY.
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*
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* This will be the first call in the sequence:
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* - mac_prepare()
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* - mac_config()
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* - pcs_config()
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* - possible pcs_an_restart()
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* - mac_finish()
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*
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* Returns zero on success, or negative errno on failure which will be
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* reported to the kernel log.
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*/
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int mac_prepare(struct phylink_config *config, unsigned int mode,
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phy_interface_t iface);
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/**
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* mac_config() - configure the MAC for the selected mode and state
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* @config: a pointer to a &struct phylink_config.
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* @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
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* @state: a pointer to a &struct phylink_link_state.
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*
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* Note - not all members of @state are valid. In particular,
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* @state->lp_advertising, @state->link, @state->an_complete are never
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* guaranteed to be correct, and so any mac_config() implementation must
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* never reference these fields.
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*
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* (this requires a rewrite - please refer to mac_link_up() for situations
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* where the PCS and MAC are not tightly integrated.)
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*
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* In all negotiation modes, as defined by @mode, @state->pause indicates the
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* pause settings which should be applied as follows. If %MLO_PAUSE_AN is not
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* set, %MLO_PAUSE_TX and %MLO_PAUSE_RX indicate whether the MAC should send
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* pause frames and/or act on received pause frames respectively. Otherwise,
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* the results of in-band negotiation/status from the MAC PCS should be used
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* to control the MAC pause mode settings.
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*
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* The action performed depends on the currently selected mode:
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*
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* %MLO_AN_FIXED, %MLO_AN_PHY:
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* Configure for non-inband negotiation mode, where the link settings
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* are completely communicated via mac_link_up(). The physical link
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* protocol from the MAC is specified by @state->interface.
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*
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* @state->advertising may be used, but is not required.
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*
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* Older drivers (prior to the mac_link_up() change) may use @state->speed,
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* @state->duplex and @state->pause to configure the MAC, but this is
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* deprecated; such drivers should be converted to use mac_link_up().
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*
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* Other members of @state must be ignored.
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*
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* Valid state members: interface, advertising.
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* Deprecated state members: speed, duplex, pause.
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*
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* %MLO_AN_INBAND:
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* place the link in an inband negotiation mode (such as 802.3z
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* 1000base-X or Cisco SGMII mode depending on the @state->interface
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* mode). In both cases, link state management (whether the link
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* is up or not) is performed by the MAC, and reported via the
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* mac_pcs_get_state() callback. Changes in link state must be made
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* by calling phylink_mac_change().
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*
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* Interface mode specific details are mentioned below.
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*
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* If in 802.3z mode, the link speed is fixed, dependent on the
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* @state->interface. Duplex and pause modes are negotiated via
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* the in-band configuration word. Advertised pause modes are set
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* according to the @state->an_enabled and @state->advertising
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* flags. Beware of MACs which only support full duplex at gigabit
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* and higher speeds.
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*
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* If in Cisco SGMII mode, the link speed and duplex mode are passed
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* in the serial bitstream 16-bit configuration word, and the MAC
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* should be configured to read these bits and acknowledge the
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* configuration word. Nothing is advertised by the MAC. The MAC is
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* responsible for reading the configuration word and configuring
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* itself accordingly.
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*
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* Valid state members: interface, an_enabled, pause, advertising.
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*
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* Implementations are expected to update the MAC to reflect the
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* requested settings - i.o.w., if nothing has changed between two
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* calls, no action is expected. If only flow control settings have
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* changed, flow control should be updated *without* taking the link
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* down. This "update" behaviour is critical to avoid bouncing the
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* link up status.
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*/
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void mac_config(struct phylink_config *config, unsigned int mode,
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const struct phylink_link_state *state);
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/**
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* mac_finish() - finish a to change the PHY interface mode
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* @config: a pointer to a &struct phylink_config.
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* @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
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* @iface: interface mode to switch to
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*
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* phylink will call this if it called mac_prepare() to allow the MAC to
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* complete any necessary steps after the MAC and PCS have been configured
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* for the @mode and @iface. E.g. a MAC driver may wish to re-enable the
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* Serdes PHY here if it was previously disabled by mac_prepare().
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*
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* Returns zero on success, or negative errno on failure which will be
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* reported to the kernel log.
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*/
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int mac_finish(struct phylink_config *config, unsigned int mode,
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phy_interface_t iface);
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/**
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* mac_an_restart() - restart 802.3z BaseX autonegotiation
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* @config: a pointer to a &struct phylink_config.
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*/
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void mac_an_restart(struct phylink_config *config);
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/**
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* mac_link_down() - take the link down
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* @config: a pointer to a &struct phylink_config.
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* @mode: link autonegotiation mode
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* @interface: link &typedef phy_interface_t mode
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*
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* If @mode is not an in-band negotiation mode (as defined by
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* phylink_autoneg_inband()), force the link down and disable any
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* Energy Efficient Ethernet MAC configuration. Interface type
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* selection must be done in mac_config().
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*/
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void mac_link_down(struct phylink_config *config, unsigned int mode,
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phy_interface_t interface);
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/**
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* mac_link_up() - allow the link to come up
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* @config: a pointer to a &struct phylink_config.
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* @phy: any attached phy
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* @mode: link autonegotiation mode
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* @interface: link &typedef phy_interface_t mode
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* @speed: link speed
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* @duplex: link duplex
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* @tx_pause: link transmit pause enablement status
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* @rx_pause: link receive pause enablement status
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*
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* Configure the MAC for an established link.
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*
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* @speed, @duplex, @tx_pause and @rx_pause indicate the finalised link
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* settings, and should be used to configure the MAC block appropriately
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* where these settings are not automatically conveyed from the PCS block,
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* or if in-band negotiation (as defined by phylink_autoneg_inband(@mode))
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* is disabled.
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*
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* Note that when 802.3z in-band negotiation is in use, it is possible
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* that the user wishes to override the pause settings, and this should
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* be allowed when considering the implementation of this method.
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*
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* If in-band negotiation mode is disabled, allow the link to come up. If
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* @phy is non-%NULL, configure Energy Efficient Ethernet by calling
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* phy_init_eee() and perform appropriate MAC configuration for EEE.
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* Interface type selection must be done in mac_config().
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*/
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void mac_link_up(struct phylink_config *config, struct phy_device *phy,
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unsigned int mode, phy_interface_t interface,
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int speed, int duplex, bool tx_pause, bool rx_pause);
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#endif
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struct phylink_pcs_ops;
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/**
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* struct phylink_pcs - PHYLINK PCS instance
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* @ops: a pointer to the &struct phylink_pcs_ops structure
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* @poll: poll the PCS for link changes
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*
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* This structure is designed to be embedded within the PCS private data,
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* and will be passed between phylink and the PCS.
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*/
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struct phylink_pcs {
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const struct phylink_pcs_ops *ops;
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bool poll;
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};
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/**
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* struct phylink_pcs_ops - MAC PCS operations structure.
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* @pcs_get_state: read the current MAC PCS link state from the hardware.
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* @pcs_config: configure the MAC PCS for the selected mode and state.
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* @pcs_an_restart: restart 802.3z BaseX autonegotiation.
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* @pcs_link_up: program the PCS for the resolved link configuration
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* (where necessary).
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*/
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struct phylink_pcs_ops {
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void (*pcs_get_state)(struct phylink_pcs *pcs,
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struct phylink_link_state *state);
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int (*pcs_config)(struct phylink_pcs *pcs, unsigned int mode,
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phy_interface_t interface,
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const unsigned long *advertising,
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bool permit_pause_to_mac);
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void (*pcs_an_restart)(struct phylink_pcs *pcs);
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void (*pcs_link_up)(struct phylink_pcs *pcs, unsigned int mode,
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phy_interface_t interface, int speed, int duplex);
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};
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#if 0 /* For kernel-doc purposes only. */
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/**
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* pcs_get_state() - Read the current inband link state from the hardware
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* @pcs: a pointer to a &struct phylink_pcs.
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* @state: a pointer to a &struct phylink_link_state.
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*
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* Read the current inband link state from the MAC PCS, reporting the
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* current speed in @state->speed, duplex mode in @state->duplex, pause
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* mode in @state->pause using the %MLO_PAUSE_RX and %MLO_PAUSE_TX bits,
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* negotiation completion state in @state->an_complete, and link up state
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* in @state->link. If possible, @state->lp_advertising should also be
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* populated.
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*
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* When present, this overrides mac_pcs_get_state() in &struct
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* phylink_mac_ops.
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*/
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void pcs_get_state(struct phylink_pcs *pcs,
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struct phylink_link_state *state);
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/**
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* pcs_config() - Configure the PCS mode and advertisement
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* @pcs: a pointer to a &struct phylink_pcs.
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* @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
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* @interface: interface mode to be used
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* @advertising: adertisement ethtool link mode mask
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* @permit_pause_to_mac: permit forwarding pause resolution to MAC
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*
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* Configure the PCS for the operating mode, the interface mode, and set
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* the advertisement mask. @permit_pause_to_mac indicates whether the
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* hardware may forward the pause mode resolution to the MAC.
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*
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* When operating in %MLO_AN_INBAND, inband should always be enabled,
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* otherwise inband should be disabled.
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*
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* For SGMII, there is no advertisement from the MAC side, the PCS should
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* be programmed to acknowledge the inband word from the PHY.
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*
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* For 1000BASE-X, the advertisement should be programmed into the PCS.
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*
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* For most 10GBASE-R, there is no advertisement.
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*/
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int pcs_config(struct phylink_pcs *pcs, unsigned int mode,
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phy_interface_t interface, const unsigned long *advertising,
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bool permit_pause_to_mac);
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/**
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* pcs_an_restart() - restart 802.3z BaseX autonegotiation
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* @pcs: a pointer to a &struct phylink_pcs.
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*
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* When PCS ops are present, this overrides mac_an_restart() in &struct
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* phylink_mac_ops.
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*/
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void pcs_an_restart(struct phylink_pcs *pcs);
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/**
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* pcs_link_up() - program the PCS for the resolved link configuration
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* @pcs: a pointer to a &struct phylink_pcs.
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* @mode: link autonegotiation mode
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* @interface: link &typedef phy_interface_t mode
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* @speed: link speed
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* @duplex: link duplex
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*
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* This call will be made just before mac_link_up() to inform the PCS of
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* the resolved link parameters. For example, a PCS operating in SGMII
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* mode without in-band AN needs to be manually configured for the link
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* and duplex setting. Otherwise, this should be a no-op.
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*/
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void pcs_link_up(struct phylink_pcs *pcs, unsigned int mode,
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phy_interface_t interface, int speed, int duplex);
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#endif
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struct phylink *phylink_create(struct phylink_config *, struct fwnode_handle *,
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phy_interface_t iface,
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const struct phylink_mac_ops *mac_ops);
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void phylink_set_pcs(struct phylink *, struct phylink_pcs *pcs);
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void phylink_destroy(struct phylink *);
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int phylink_connect_phy(struct phylink *, struct phy_device *);
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int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags);
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int phylink_fwnode_phy_connect(struct phylink *pl,
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struct fwnode_handle *fwnode,
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u32 flags);
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void phylink_disconnect_phy(struct phylink *);
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void phylink_mac_change(struct phylink *, bool up);
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void phylink_start(struct phylink *);
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void phylink_stop(struct phylink *);
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void phylink_suspend(struct phylink *pl, bool mac_wol);
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void phylink_resume(struct phylink *pl);
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void phylink_ethtool_get_wol(struct phylink *, struct ethtool_wolinfo *);
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int phylink_ethtool_set_wol(struct phylink *, struct ethtool_wolinfo *);
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int phylink_ethtool_ksettings_get(struct phylink *,
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struct ethtool_link_ksettings *);
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int phylink_ethtool_ksettings_set(struct phylink *,
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const struct ethtool_link_ksettings *);
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int phylink_ethtool_nway_reset(struct phylink *);
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void phylink_ethtool_get_pauseparam(struct phylink *,
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struct ethtool_pauseparam *);
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int phylink_ethtool_set_pauseparam(struct phylink *,
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struct ethtool_pauseparam *);
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int phylink_get_eee_err(struct phylink *);
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int phylink_init_eee(struct phylink *, bool);
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int phylink_ethtool_get_eee(struct phylink *, struct ethtool_eee *);
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int phylink_ethtool_set_eee(struct phylink *, struct ethtool_eee *);
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int phylink_mii_ioctl(struct phylink *, struct ifreq *, int);
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int phylink_speed_down(struct phylink *pl, bool sync);
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int phylink_speed_up(struct phylink *pl);
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#define phylink_zero(bm) \
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bitmap_zero(bm, __ETHTOOL_LINK_MODE_MASK_NBITS)
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#define __phylink_do_bit(op, bm, mode) \
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op(ETHTOOL_LINK_MODE_ ## mode ## _BIT, bm)
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#define phylink_set(bm, mode) __phylink_do_bit(__set_bit, bm, mode)
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#define phylink_clear(bm, mode) __phylink_do_bit(__clear_bit, bm, mode)
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#define phylink_test(bm, mode) __phylink_do_bit(test_bit, bm, mode)
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void phylink_set_port_modes(unsigned long *bits);
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void phylink_set_10g_modes(unsigned long *mask);
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void phylink_helper_basex_speed(struct phylink_link_state *state);
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void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs,
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struct phylink_link_state *state);
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int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs,
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phy_interface_t interface,
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const unsigned long *advertising);
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int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode,
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phy_interface_t interface,
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const unsigned long *advertising);
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void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs);
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void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,
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struct phylink_link_state *state);
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void phylink_decode_usxgmii_word(struct phylink_link_state *state,
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uint16_t lpa);
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#endif
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