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OpenCloudOS-Kernel/include/linux/phylink.h

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#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;
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 */
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.
* @link: true if the link is up.
* @an_enabled: true if autonegotiation is enabled/desired.
* @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;
unsigned int link:1;
unsigned int an_enabled: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
* @legacy_pre_march2020: driver has not been updated for March 2020 updates
* (See commit 7cceb599d15d ("net: phylink: avoid mac_config calls")
* @poll_fixed_state: if true, starts link_poll,
* if MAC link is at %MLO_AN_FIXED mode.
* @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 legacy_pre_march2020;
bool poll_fixed_state;
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;
};
/**
* struct phylink_mac_ops - MAC operations structure.
* @validate: Validate and update the link configuration.
* @mac_select_pcs: Select a PCS for the interface mode.
* @mac_pcs_get_state: Read the current link state from the hardware.
* @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_an_restart: restart 802.3z BaseX autonegotiation.
* @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 {
void (*validate)(struct phylink_config *config,
unsigned long *supported,
struct phylink_link_state *state);
struct phylink_pcs *(*mac_select_pcs)(struct phylink_config *config,
phy_interface_t interface);
void (*mac_pcs_get_state)(struct phylink_config *config,
struct phylink_link_state *state);
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_an_restart)(struct phylink_config *config);
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. */
/**
* validate - Validate and update the link configuration
* @config: a pointer to a &struct phylink_config.
* @supported: ethtool bitmask for supported link modes.
* @state: a pointer to a &struct phylink_link_state.
*
* Clear bits in the @supported and @state->advertising masks that
* are not supportable by the MAC.
*
* Note that the PHY may be able to transform from one connection
* technology to another, so, eg, don't clear 1000BaseX just
* because the MAC is unable to BaseX mode. This is more about
* clearing unsupported speeds and duplex settings. The port modes
* should not be cleared; phylink_set_port_modes() will help with this.
*
* If the @state->interface mode is %PHY_INTERFACE_MODE_1000BASEX
* or %PHY_INTERFACE_MODE_2500BASEX, select the appropriate mode
* based on @state->advertising and/or @state->speed and update
* @state->interface accordingly. See phylink_helper_basex_speed().
*
* When @config->supported_interfaces has been set, phylink will iterate
* over the supported interfaces to determine the full capability of the
* MAC. The validation function must not print errors if @state->interface
* is set to an unexpected value.
*
* When @config->supported_interfaces is empty, phylink will call this
* function with @state->interface set to %PHY_INTERFACE_MODE_NA, and
* expects the MAC driver to return all supported link modes.
*
* If the @state->interface mode is not supported, then the @supported
* mask must be cleared.
*/
void validate(struct phylink_config *config, unsigned long *supported,
struct phylink_link_state *state);
/**
* 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_pcs_get_state() - Read the current inband link state from the hardware
* @config: a pointer to a &struct phylink_config.
* @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.
*
* Note: This is a legacy method. This function will not be called unless
* legacy_pre_march2020 is set in &struct phylink_config and there is no
* PCS attached.
*/
void mac_pcs_get_state(struct phylink_config *config,
struct phylink_link_state *state);
/**
* 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.
*
* Note: For legacy March 2020 drivers (drivers with legacy_pre_march2020 set
* in their &phylnk_config and which don't have a PCS), this function will be
* called on each link up event, and to also change the in-band advert. For
* non-legacy drivers, it 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 any case, it is strongly preferred that speed, duplex and pause settings
* are handled in the mac_link_up() method and not in this method.
*
* (this requires a rewrite - please refer to mac_link_up() for situations
* where the PCS and MAC are not tightly integrated.)
*
* 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
* mac_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_an_restart() - restart 802.3z BaseX autonegotiation
* @config: a pointer to a &struct phylink_config.
*
* Note: This is a legacy method. This function will not be called unless
* legacy_pre_march2020 is set in &struct phylink_config and there is no
* PCS attached.
*/
void mac_an_restart(struct phylink_config *config);
/**
* 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
* @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.
*/
struct phylink_pcs {
const struct phylink_pcs_ops *ops;
bool poll;
};
/**
* struct phylink_pcs_ops - MAC PCS operations structure.
* @pcs_validate: validate the link configuration.
* @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);
void (*pcs_get_state)(struct phylink_pcs *pcs,
struct phylink_link_state *state);
int (*pcs_config)(struct phylink_pcs *pcs, unsigned int 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 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_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 mac_pcs_get_state() in &struct
* phylink_mac_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.
* @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
* @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.
*/
int pcs_config(struct phylink_pcs *pcs, unsigned int 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.
* @mode: link autonegotiation mode
* @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.
*/
void pcs_link_up(struct phylink_pcs *pcs, unsigned int mode,
phy_interface_t interface, int speed, int duplex);
#endif
void phylink_get_linkmodes(unsigned long *linkmodes, phy_interface_t interface,
unsigned long mac_capabilities);
void phylink_generic_validate(struct phylink_config *config,
unsigned long *supported,
struct phylink_link_state *state);
struct phylink *phylink_create(struct phylink_config *, struct fwnode_handle *,
phy_interface_t iface,
const struct phylink_mac_ops *mac_ops);
void phylink_destroy(struct phylink *);
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,
struct fwnode_handle *fwnode,
u32 flags);
void phylink_disconnect_phy(struct phylink *);
void phylink_mac_change(struct phylink *, 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);
void phylink_helper_basex_speed(struct phylink_link_state *state);
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, unsigned int mode,
phy_interface_t interface,
const unsigned long *advertising);
void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs);
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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