294 lines
11 KiB
C
294 lines
11 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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*/
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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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};
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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_config: configure the MAC for the selected mode and state.
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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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void (*mac_config)(struct phylink_config *config, unsigned int mode,
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const struct phylink_link_state *state);
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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, unsigned int mode,
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phy_interface_t interface,
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struct phy_device *phy);
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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 @state->interface is %PHY_INTERFACE_MODE_NA, phylink expects the
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* 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_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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* 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 the specified @state->speed and @state->duplex over a link
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* specified by @state->interface. @state->advertising may be used, but
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* is not required. Pause modes as above. Other members of @state must
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* be ignored.
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*
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* Valid state members: interface, speed, duplex, pause, advertising.
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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_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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* @mode: link autonegotiation mode
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* @interface: link &typedef phy_interface_t mode
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* @phy: any attached phy
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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()), allow the link to come up. If @phy
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* 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, unsigned int mode,
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phy_interface_t interface,
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struct phy_device *phy);
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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 *ops);
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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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void phylink_disconnect_phy(struct phylink *);
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int phylink_fixed_state_cb(struct phylink *,
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void (*cb)(struct net_device *dev,
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struct phylink_link_state *));
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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_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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#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_helper_basex_speed(struct phylink_link_state *state);
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#endif
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