Quelle phylink.h
Sprache: C
#ifndef NETDEV_PCS_H
#define NETDEV_PCS_H
#include <linux/phy.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <net/eee.h>
struct device_node;
struct ethtool_cmd;
struct fwnode_handle;
struct net_device;
struct phylink;
enum {
MLO_PAUSE_NONE,
MLO_PAUSE_RX = BIT(0 ),
MLO_PAUSE_TX = BIT(1 ),
MLO_PAUSE_TXRX_MASK = MLO_PAUSE_TX | MLO_PAUSE_RX,
MLO_PAUSE_AN = BIT(2 ),
MLO_AN_PHY = 0 , /* Conventional PHY */
MLO_AN_FIXED, /* Fixed-link mode */
MLO_AN_INBAND, /* In-band protocol */
/* PCS "negotiation" mode.
* PHYLINK_PCS_NEG_NONE - protocol has no inband capability
* PHYLINK_PCS_NEG_OUTBAND - some out of band or fixed link setting
* PHYLINK_PCS_NEG_INBAND_DISABLED - inband mode disabled , e . g .
* 1000 base - X with autoneg off
* PHYLINK_PCS_NEG_INBAND_ENABLED - inband mode enabled
* Additionally , this can be tested using bitmasks :
* PHYLINK_PCS_NEG_INBAND - inband mode selected
* PHYLINK_PCS_NEG_ENABLED - negotiation mode enabled
*/
PHYLINK_PCS_NEG_NONE = 0 ,
PHYLINK_PCS_NEG_ENABLED = BIT(4 ),
PHYLINK_PCS_NEG_OUTBAND = BIT(5 ),
PHYLINK_PCS_NEG_INBAND = BIT(6 ),
PHYLINK_PCS_NEG_INBAND_DISABLED = PHYLINK_PCS_NEG_INBAND,
PHYLINK_PCS_NEG_INBAND_ENABLED = PHYLINK_PCS_NEG_INBAND |
PHYLINK_PCS_NEG_ENABLED,
/* MAC_SYM_PAUSE and MAC_ASYM_PAUSE are used when configuring our
* autonegotiation advertisement . They correspond to the PAUSE and
* ASM_DIR bits defined by 802 . 3 , respectively .
*
* The following table lists the values of tx_pause and rx_pause which
* might be requested in mac_link_up . The exact values depend on either
* the results of autonegotation ( if MLO_PAUSE_AN is set ) or user
* configuration ( if MLO_PAUSE_AN is not set ) .
*
* MAC_SYM_PAUSE MAC_ASYM_PAUSE MLO_PAUSE_AN tx_pause / rx_pause
* = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
* 0 0 0 0 / 0
* 0 0 1 0 / 0
* 0 1 0 0 / 0 , 0 / 1 , 1 / 0 , 1 / 1
* 0 1 1 0 / 0 , 1 / 0
* 1 0 0 0 / 0 , 1 / 1
* 1 0 1 0 / 0 , 1 / 1
* 1 1 0 0 / 0 , 0 / 1 , 1 / 0 , 1 / 1
* 1 1 1 0 / 0 , 0 / 1 , 1 / 1
*
* If you set MAC_ASYM_PAUSE , the user may request any combination of
* tx_pause and rx_pause . You do not have to support these
* combinations .
*
* However , you should support combinations of tx_pause and rx_pause
* which might be the result of autonegotation . For example , don ' t set
* MAC_SYM_PAUSE unless your device can support tx_pause and rx_pause
* at the same time .
*/
MAC_SYM_PAUSE = BIT(0 ),
MAC_ASYM_PAUSE = BIT(1 ),
MAC_10HD = BIT(2 ),
MAC_10FD = BIT(3 ),
MAC_10 = MAC_10HD | MAC_10FD,
MAC_100HD = BIT(4 ),
MAC_100FD = BIT(5 ),
MAC_100 = MAC_100HD | MAC_100FD,
MAC_1000HD = BIT(6 ),
MAC_1000FD = BIT(7 ),
MAC_1000 = MAC_1000HD | MAC_1000FD,
MAC_2500FD = BIT(8 ),
MAC_5000FD = BIT(9 ),
MAC_10000FD = BIT(10 ),
MAC_20000FD = BIT(11 ),
MAC_25000FD = BIT(12 ),
MAC_40000FD = BIT(13 ),
MAC_50000FD = BIT(14 ),
MAC_56000FD = BIT(15 ),
MAC_100000FD = BIT(16 ),
MAC_200000FD = BIT(17 ),
MAC_400000FD = BIT(18 ),
};
static inline bool phylink_autoneg_inband(unsigned int mode)
{
return mode == MLO_AN_INBAND;
}
/**
* struct phylink_link_state - link state structure
* @ advertising : ethtool bitmask containing advertised link modes
* @ lp_advertising : ethtool bitmask containing link partner advertised link
* modes
* @ interface : link & typedef phy_interface_t mode
* @ speed : link speed , one of the SPEED_ * constants .
* @ duplex : link duplex mode , one of DUPLEX_ * constants .
* @ pause : link pause state , described by MLO_PAUSE_ * constants .
* @ rate_matching : rate matching being performed , one of the RATE_MATCH_ *
* constants . If rate matching is taking place , then the speed / duplex of
* the medium link mode ( @ speed and @ duplex ) and the speed / duplex of the phy
* interface mode ( @ interface ) are different .
* @ link : true if the link is up .
* @ an_complete : true if autonegotiation has completed .
*/
struct phylink_link_state {
__ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
__ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising);
phy_interface_t interface;
int speed;
int duplex;
int pause;
int rate_matching;
unsigned int link:1 ;
unsigned int an_complete:1 ;
};
enum phylink_op_type {
PHYLINK_NETDEV = 0 ,
PHYLINK_DEV,
};
/**
* struct phylink_config - PHYLINK configuration structure
* @ dev : a pointer to a struct device associated with the MAC
* @ type : operation type of PHYLINK instance
* @ poll_fixed_state : if true , starts link_poll ,
* if MAC link is at % MLO_AN_FIXED mode .
* @ mac_managed_pm : if true , indicate the MAC driver is responsible for PHY PM .
* @ mac_requires_rxc : if true , the MAC always requires a receive clock from PHY .
* The PHY driver should start the clock signal as soon as
* possible and avoid stopping it during suspend events .
* @ default_an_inband : if true , defaults to MLO_AN_INBAND rather than
* MLO_AN_PHY . A fixed - link specification will override .
* @ eee_rx_clk_stop_enable : if true , PHY can stop the receive clock during LPI
* @ 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 .
* @ lpi_interfaces : bitmap describing which PHY interface modes can support
* LPI signalling .
* @ mac_capabilities : MAC pause / speed / duplex capabilities .
* @ lpi_capabilities : MAC speeds which can support LPI signalling
* @ lpi_timer_default : Default EEE LPI timer setting .
* @ eee_enabled_default : If set , EEE will be enabled by phylink at creation time
*/
struct phylink_config {
struct device *dev;
enum phylink_op_type type;
bool poll_fixed_state;
bool mac_managed_pm;
bool mac_requires_rxc;
bool default_an_inband;
bool eee_rx_clk_stop_enable;
void (*get_fixed_state)(struct phylink_config *config,
struct phylink_link_state *state);
DECLARE_PHY_INTERFACE_MASK(supported_interfaces);
DECLARE_PHY_INTERFACE_MASK(lpi_interfaces);
unsigned long mac_capabilities;
unsigned long lpi_capabilities;
u32 lpi_timer_default;
bool eee_enabled_default;
};
void phylink_limit_mac_speed(struct phylink_config *config, u32 max_speed);
/**
* struct phylink_mac_ops - MAC operations structure .
* @ mac_get_caps : Get MAC capabilities for interface mode .
* @ mac_select_pcs : Select a PCS for the interface mode .
* @ mac_prepare : prepare for a major reconfiguration of the interface .
* @ mac_config : configure the MAC for the selected mode and state .
* @ mac_finish : finish a major reconfiguration of the interface .
* @ mac_link_down : take the link down .
* @ mac_link_up : allow the link to come up .
* @ mac_disable_tx_lpi : disable LPI .
* @ mac_enable_tx_lpi : enable and configure LPI .
*
* The individual methods are described more fully below .
*/
struct phylink_mac_ops {
unsigned long (*mac_get_caps)(struct phylink_config *config,
phy_interface_t interface);
struct phylink_pcs *(*mac_select_pcs)(struct phylink_config *config,
phy_interface_t interface);
int (*mac_prepare)(struct phylink_config *config, unsigned int mode,
phy_interface_t iface);
void (*mac_config)(struct phylink_config *config, unsigned int mode,
const struct phylink_link_state *state);
int (*mac_finish)(struct phylink_config *config, unsigned int mode,
phy_interface_t iface);
void (*mac_link_down)(struct phylink_config *config, unsigned int mode,
phy_interface_t interface);
void (*mac_link_up)(struct phylink_config *config,
struct phy_device *phy, unsigned int mode,
phy_interface_t interface, int speed, int duplex,
bool tx_pause, bool rx_pause);
void (*mac_disable_tx_lpi)(struct phylink_config *config);
int (*mac_enable_tx_lpi)(struct phylink_config *config, u32 timer,
bool tx_clk_stop);
};
#if 0 /* For kernel-doc purposes only. */
/**
* mac_get_caps : Get MAC capabilities for interface mode .
* @ config : a pointer to a & struct phylink_config .
* @ interface : PHY interface mode .
*
* Optional method . When not provided , config - > mac_capabilities will be used .
* When implemented , this returns the MAC capabilities for the specified
* interface mode where there is some special handling required by the MAC
* driver ( e . g . not supporting half - duplex in certain interface modes . )
*/
unsigned long mac_get_caps(struct phylink_config *config,
phy_interface_t interface);
/**
* mac_select_pcs : Select a PCS for the interface mode .
* @ config : a pointer to a & struct phylink_config .
* @ interface : PHY interface mode for PCS
*
* Return the & struct phylink_pcs for the specified interface mode , or
* NULL if none is required , or an error pointer on error .
*
* This must not modify any state . It is used to query which PCS should
* be used . Phylink will use this during validation to ensure that the
* configuration is valid , and when setting a configuration to internally
* set the PCS that will be used .
*/
struct phylink_pcs *mac_select_pcs(struct phylink_config *config,
phy_interface_t interface);
/**
* mac_prepare ( ) - prepare to change the PHY interface mode
* @ config : a pointer to a & struct phylink_config .
* @ mode : one of % MLO_AN_FIXED , % MLO_AN_PHY , % MLO_AN_INBAND .
* @ iface : interface mode to switch to
*
* phylink will call this method at the beginning of a full initialisation
* of the link , which includes changing the interface mode or at initial
* startup time . It may be called for the current mode . The MAC driver
* should perform whatever actions are required , e . g . disabling the
* Serdes PHY .
*
* This will be the first call in the sequence :
* - mac_prepare ( )
* - mac_config ( )
* - pcs_config ( )
* - possible pcs_an_restart ( )
* - mac_finish ( )
*
* Returns zero on success , or negative errno on failure which will be
* reported to the kernel log .
*/
int mac_prepare(struct phylink_config *config, unsigned int mode,
phy_interface_t iface);
/**
* mac_config ( ) - configure the MAC for the selected mode and state
* @ config : a pointer to a & struct phylink_config .
* @ mode : one of % MLO_AN_FIXED , % MLO_AN_PHY , % MLO_AN_INBAND .
* @ state : a pointer to a & struct phylink_link_state .
*
* Note - not all members of @ state are valid . In particular ,
* @ state - > lp_advertising , @ state - > link , @ state - > an_complete are never
* guaranteed to be correct , and so any mac_config ( ) implementation must
* never reference these fields .
*
* This will only be called to reconfigure the MAC for a " major " change in
* e . g . interface mode . It will not be called for changes in speed , duplex
* or pause modes or to change the in - band advertisement .
*
* In all negotiation modes , as defined by @ mode , @ state - > pause indicates the
* pause settings which should be applied as follows . If % MLO_PAUSE_AN is not
* set , % MLO_PAUSE_TX and % MLO_PAUSE_RX indicate whether the MAC should send
* pause frames and / or act on received pause frames respectively . Otherwise ,
* the results of in - band negotiation / status from the MAC PCS should be used
* to control the MAC pause mode settings .
*
* The action performed depends on the currently selected mode :
*
* % MLO_AN_FIXED , % MLO_AN_PHY :
* Configure for non - inband negotiation mode , where the link settings
* are completely communicated via mac_link_up ( ) . The physical link
* protocol from the MAC is specified by @ state - > interface .
*
* @ state - > advertising may be used , but is not required .
*
* Older drivers ( prior to the mac_link_up ( ) change ) may use @ state - > speed ,
* @ state - > duplex and @ state - > pause to configure the MAC , but this is
* deprecated ; such drivers should be converted to use mac_link_up ( ) .
*
* Other members of @ state must be ignored .
*
* Valid state members : interface , advertising .
* Deprecated state members : speed , duplex , pause .
*
* % MLO_AN_INBAND :
* place the link in an inband negotiation mode ( such as 802 . 3 z
* 1000 base - X or Cisco SGMII mode depending on the @ state - > interface
* mode ) . In both cases , link state management ( whether the link
* is up or not ) is performed by the MAC , and reported via the
* pcs_get_state ( ) callback . Changes in link state must be made
* by calling phylink_mac_change ( ) .
*
* Interface mode specific details are mentioned below .
*
* If in 802 . 3 z mode , the link speed is fixed , dependent on the
* @ state - > interface . Duplex and pause modes are negotiated via
* the in - band configuration word . Advertised pause modes are set
* according to the @ state - > an_enabled and @ state - > advertising
* flags . Beware of MACs which only support full duplex at gigabit
* and higher speeds .
*
* If in Cisco SGMII mode , the link speed and duplex mode are passed
* in the serial bitstream 16 - bit configuration word , and the MAC
* should be configured to read these bits and acknowledge the
* configuration word . Nothing is advertised by the MAC . The MAC is
* responsible for reading the configuration word and configuring
* itself accordingly .
*
* Valid state members : interface , an_enabled , pause , advertising .
*
* Implementations are expected to update the MAC to reflect the
* requested settings - i . o . w . , if nothing has changed between two
* calls , no action is expected . If only flow control settings have
* changed , flow control should be updated * without * taking the link
* down . This " update " behaviour is critical to avoid bouncing the
* link up status .
*/
void mac_config(struct phylink_config *config, unsigned int mode,
const struct phylink_link_state *state);
/**
* mac_finish ( ) - finish a to change the PHY interface mode
* @ config : a pointer to a & struct phylink_config .
* @ mode : one of % MLO_AN_FIXED , % MLO_AN_PHY , % MLO_AN_INBAND .
* @ iface : interface mode to switch to
*
* phylink will call this if it called mac_prepare ( ) to allow the MAC to
* complete any necessary steps after the MAC and PCS have been configured
* for the @ mode and @ iface . E . g . a MAC driver may wish to re - enable the
* Serdes PHY here if it was previously disabled by mac_prepare ( ) .
*
* Returns zero on success , or negative errno on failure which will be
* reported to the kernel log .
*/
int mac_finish(struct phylink_config *config, unsigned int mode,
phy_interface_t iface);
/**
* mac_link_down ( ) - notification that the link has gone down
* @ config : a pointer to a & struct phylink_config .
* @ mode : link autonegotiation mode
* @ interface : link & typedef phy_interface_t mode
*
* Notifies the MAC that the link has gone down . This will not be called
* unless mac_link_up ( ) has been previously called .
*
* The MAC should stop processing packets for transmission and reception .
* phylink will have called netif_carrier_off ( ) to notify the networking
* stack that the link has gone down , so MAC drivers should not make this
* call .
*
* If @ mode is % MLO_AN_INBAND , then this function must not prevent the
* link coming up .
*/
void mac_link_down(struct phylink_config *config, unsigned int mode,
phy_interface_t interface);
/**
* mac_link_up ( ) - notification that the link has come up
* @ config : a pointer to a & struct phylink_config .
* @ phy : any attached phy ( deprecated - please use LPI interfaces )
* @ 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
*
* Notifies the MAC that the link has come up , and the parameters of the
* link as seen from the MACs point of view . If mac_link_up ( ) has been
* called previously , there will be an intervening call to mac_link_down ( )
* before this method will be subsequently called .
*
* @ 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 . 3 z 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 .
*
* Once configured , the MAC may begin to process packets for transmission
* and reception .
*
* 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);
/**
* mac_disable_tx_lpi ( ) - disable LPI generation at the MAC
* @ config : a pointer to a & struct phylink_config .
*
* Disable generation of LPI at the MAC , effectively preventing the MAC
* from indicating that it is idle .
*/
void mac_disable_tx_lpi(struct phylink_config *config);
/**
* mac_enable_tx_lpi ( ) - configure and enable LPI generation at the MAC
* @ config : a pointer to a & struct phylink_config .
* @ timer : LPI timeout in microseconds .
* @ tx_clk_stop : allow xMII transmit clock to be stopped during LPI
*
* Configure the LPI timeout accordingly . This will only be called when
* the link is already up , to cater for situations where the hardware
* needs to be programmed according to the link speed .
*
* Enable LPI generation at the MAC , and configure whether the xMII transmit
* clock may be stopped .
*
* Returns : 0 on success . Please consult with rmk before returning an error .
*/
int mac_enable_tx_lpi(struct phylink_config *config, u32 timer,
bool tx_clk_stop);
#endif
struct phylink_pcs_ops;
/**
* struct phylink_pcs - PHYLINK PCS instance
* @ supported_interfaces : describing which PHY_INTERFACE_MODE_xxx
* are supported by this PCS .
* @ ops : a pointer to the & struct phylink_pcs_ops structure
* @ phylink : pointer to & struct phylink_config
* @ poll : poll the PCS for link changes
* @ rxc_always_on : The MAC driver requires the reference clock
* to always be on . Standalone PCS drivers which
* do not have access to a PHY device can check
* this instead of PHY_F_RXC_ALWAYS_ON .
*
* This structure is designed to be embedded within the PCS private data ,
* and will be passed between phylink and the PCS .
*
* The @ phylink member is private to phylink and must not be touched by
* the PCS driver .
*/
struct phylink_pcs {
DECLARE_PHY_INTERFACE_MASK(supported_interfaces);
const struct phylink_pcs_ops *ops;
struct phylink *phylink;
bool poll;
bool rxc_always_on;
};
/**
* struct phylink_pcs_ops - MAC PCS operations structure .
* @ pcs_validate : validate the link configuration .
* @ pcs_inband_caps : query inband support for interface mode .
* @ pcs_enable : enable the PCS .
* @ pcs_disable : disable the PCS .
* @ pcs_pre_config : pre - mac_config method ( for errata )
* @ pcs_post_config : post - mac_config method ( for arrata )
* @ pcs_get_state : read the current MAC PCS link state from the hardware .
* @ pcs_config : configure the MAC PCS for the selected mode and state .
* @ pcs_an_restart : restart 802 . 3 z BaseX autonegotiation .
* @ pcs_link_up : program the PCS for the resolved link configuration
* ( where necessary ) .
* @ pcs_disable_eee : optional notification to PCS that EEE has been disabled
* at the MAC .
* @ pcs_enable_eee : optional notification to PCS that EEE will be enabled at
* the MAC .
* @ pcs_pre_init : configure PCS components necessary for MAC hardware
* initialization e . g . RX clock for stmmac .
*/
struct phylink_pcs_ops {
int (*pcs_validate)(struct phylink_pcs *pcs, unsigned long *supported,
const struct phylink_link_state *state);
unsigned int (*pcs_inband_caps)(struct phylink_pcs *pcs,
phy_interface_t interface);
int (*pcs_enable)(struct phylink_pcs *pcs);
void (*pcs_disable)(struct phylink_pcs *pcs);
void (*pcs_pre_config)(struct phylink_pcs *pcs,
phy_interface_t interface);
int (*pcs_post_config)(struct phylink_pcs *pcs,
phy_interface_t interface);
void (*pcs_get_state)(struct phylink_pcs *pcs, unsigned int neg_mode,
struct phylink_link_state *state);
int (*pcs_config)(struct phylink_pcs *pcs, unsigned int neg_mode,
phy_interface_t interface,
const unsigned long *advertising,
bool permit_pause_to_mac);
void (*pcs_an_restart)(struct phylink_pcs *pcs);
void (*pcs_link_up)(struct phylink_pcs *pcs, unsigned int neg_mode,
phy_interface_t interface, int speed, int duplex);
void (*pcs_disable_eee)(struct phylink_pcs *pcs);
void (*pcs_enable_eee)(struct phylink_pcs *pcs);
int (*pcs_pre_init)(struct phylink_pcs *pcs);
};
#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_inband_caps - query PCS in - band capabilities for interface mode .
* @ pcs : a pointer to a & struct phylink_pcs .
* @ interface : interface mode to be queried
*
* Returns zero if it is unknown what in - band signalling is supported by the
* PHY ( e . g . because the PHY driver doesn ' t implement the method . ) Otherwise ,
* returns a bit mask of the LINK_INBAND_ * values from
* & enum link_inband_signalling to describe which inband modes are supported
* for this interface mode .
*/
unsigned int pcs_inband_caps(struct phylink_pcs *pcs,
phy_interface_t interface);
/**
* pcs_enable ( ) - enable the PCS .
* @ pcs : a pointer to a & struct phylink_pcs .
*/
int pcs_enable(struct phylink_pcs *pcs);
/**
* pcs_disable ( ) - disable the PCS .
* @ pcs : a pointer to a & struct phylink_pcs .
*/
void pcs_disable(struct phylink_pcs *pcs);
/**
* pcs_get_state ( ) - Read the current inband link state from the hardware
* @ pcs : a pointer to a & struct phylink_pcs .
* @ neg_mode : link negotiation mode ( PHYLINK_PCS_NEG_xxx )
* @ 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 that the @ neg_mode parameter is always the PHYLINK_PCS_NEG_xxx
* state , not MLO_AN_xxx .
*/
void pcs_get_state(struct phylink_pcs *pcs, unsigned int neg_mode,
struct phylink_link_state *state);
/**
* pcs_config ( ) - Configure the PCS mode and advertisement
* @ pcs : a pointer to a & struct phylink_pcs .
* @ neg_mode : link negotiation mode ( see below )
* @ interface : interface mode to be used
* @ advertising : adertisement ethtool link mode mask
* @ permit_pause_to_mac : permit forwarding pause resolution to MAC
*
* Configure the PCS for the operating mode , the interface mode , and set
* the advertisement mask . @ permit_pause_to_mac indicates whether the
* hardware may forward the pause mode resolution to the MAC .
*
* When operating in % MLO_AN_INBAND , inband should always be enabled ,
* otherwise inband should be disabled .
*
* For SGMII , there is no advertisement from the MAC side , the PCS should
* be programmed to acknowledge the inband word from the PHY .
*
* For 1000 BASE - X , the advertisement should be programmed into the PCS .
*
* For most 10 GBASE - R , there is no advertisement .
*
* The % neg_mode argument should be tested via the phylink_mode_ * ( ) family of
* functions , or for PCS that set pcs - > neg_mode true , should be tested
* against the PHYLINK_PCS_NEG_ * definitions .
*
* pcs_config ( ) will be called when configuration of the PCS is required
* or when the advertisement is possibly updated . It must not unnecessarily
* disrupt an established link .
*
* When an autonegotiation restart is required for 802 . 3 z modes , . pcs_config ( )
* should return a positive non - zero integer ( e . g . 1 ) to indicate to phylink
* to call the pcs_an_restart ( ) method .
*/
int pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode,
phy_interface_t interface, const unsigned long *advertising,
bool permit_pause_to_mac);
/**
* pcs_an_restart ( ) - restart 802 . 3 z BaseX autonegotiation
* @ pcs : a pointer to a & struct phylink_pcs .
*
* When PCS ops are present , this overrides mac_an_restart ( ) in & struct
* phylink_mac_ops .
*/
void pcs_an_restart(struct phylink_pcs *pcs);
/**
* pcs_link_up ( ) - program the PCS for the resolved link configuration
* @ pcs : a pointer to a & struct phylink_pcs .
* @ neg_mode : link negotiation mode ( see below )
* @ interface : link & typedef phy_interface_t mode
* @ speed : link speed
* @ duplex : link duplex
*
* This call will be made just before mac_link_up ( ) to inform the PCS of
* the resolved link parameters . For example , a PCS operating in SGMII
* mode without in - band AN needs to be manually configured for the link
* and duplex setting . Otherwise , this should be a no - op .
*
* The % mode argument should be tested via the phylink_mode_ * ( ) family of
* functions , or for PCS that set pcs - > neg_mode true , should be tested
* against the PHYLINK_PCS_NEG_ * definitions .
*/
void pcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode,
phy_interface_t interface, int speed, int duplex);
/**
* pcs_disable_eee ( ) - Disable EEE at the PCS
* @ pcs : a pointer to a & struct phylink_pcs
*
* Optional method informing the PCS that EEE has been disabled at the MAC .
*/
void pcs_disable_eee(struct phylink_pcs *pcs);
/**
* pcs_enable_eee ( ) - Enable EEE at the PCS
* @ pcs : a pointer to a & struct phylink_pcs
*
* Optional method informing the PCS that EEE is about to be enabled at the MAC .
*/
void pcs_enable_eee(struct phylink_pcs *pcs);
/**
* pcs_pre_init ( ) - Configure PCS components necessary for MAC initialization
* @ pcs : a pointer to a & struct phylink_pcs .
*
* This function can be called by MAC drivers through the
* phylink_pcs_pre_init ( ) wrapper , before their hardware is initialized . It
* should not be called after the link is brought up , as reconfiguring the PCS
* at this point could break the link .
*
* Some MAC devices require specific hardware initialization to be performed by
* their associated PCS device before they can properly initialize their own
* hardware . An example of this is the initialization of stmmac controllers ,
* which requires an active REF_CLK signal to be provided by the PHY / PCS .
*
* By calling phylink_pcs_pre_init ( ) , MAC drivers can ensure that the PCS is
* setup in a way that allows for successful hardware initialization .
*
* The specific configuration performed by pcs_pre_init ( ) is dependent on the
* model of PCS and the requirements of the MAC device attached to it . PCS
* driver authors should consider whether their target device is to be used in
* conjunction with a MAC device whose driver calls phylink_pcs_pre_init ( ) . MAC
* driver authors should document their requirements for the PCS
* pre - initialization .
*
*/
int pcs_pre_init(struct phylink_pcs *pcs);
#endif
struct phylink *phylink_create(struct phylink_config *,
const struct fwnode_handle *,
phy_interface_t,
const struct phylink_mac_ops *);
void phylink_destroy(struct phylink *);
bool phylink_expects_phy(struct phylink *pl);
int phylink_connect_phy(struct phylink *, struct phy_device *);
int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags);
int phylink_fwnode_phy_connect(struct phylink *pl,
const struct fwnode_handle *fwnode,
u32 flags);
void phylink_disconnect_phy(struct phylink *);
int phylink_set_fixed_link(struct phylink *,
const struct phylink_link_state *);
void phylink_mac_change(struct phylink *, bool up);
void phylink_pcs_change(struct phylink_pcs *, bool up);
int phylink_pcs_pre_init(struct phylink *pl, struct phylink_pcs *pcs);
void phylink_start(struct phylink *);
void phylink_stop(struct phylink *);
void phylink_rx_clk_stop_block(struct phylink *);
void phylink_rx_clk_stop_unblock(struct phylink *);
void phylink_suspend(struct phylink *pl, bool mac_wol);
void phylink_prepare_resume(struct phylink *pl);
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_ethtool_get_eee(struct phylink *link, struct ethtool_keee *eee);
int phylink_ethtool_set_eee(struct phylink *link, struct ethtool_keee *eee);
int phylink_mii_ioctl(struct phylink *, struct ifreq *, int );
int phylink_speed_down(struct phylink *pl, bool sync);
int phylink_speed_up(struct phylink *pl);
#define phylink_zero(bm) \
bitmap_zero(bm, __ETHTOOL_LINK_MODE_MASK_NBITS)
#define __phylink_do_bit(op, bm, mode) \
op(ETHTOOL_LINK_MODE_ ## mode ## _BIT, bm)
#define phylink_set(bm, mode) __phylink_do_bit(__set_bit, bm, mode)
#define phylink_clear(bm, mode) __phylink_do_bit(__clear_bit, bm, mode)
#define phylink_test(bm, mode) __phylink_do_bit(test_bit, bm, mode)
void phylink_set_port_modes(unsigned long *bits);
/**
* phylink_get_link_timer_ns - return the PCS link timer value
* @ interface : link & typedef phy_interface_t mode
*
* Return the PCS link timer setting in nanoseconds for the PHY @ interface
* mode , or - EINVAL if not appropriate .
*/
static inline int phylink_get_link_timer_ns(phy_interface_t interface)
{
switch (interface) {
case PHY_INTERFACE_MODE_SGMII:
case PHY_INTERFACE_MODE_QSGMII:
case PHY_INTERFACE_MODE_USXGMII:
case PHY_INTERFACE_MODE_10G_QXGMII:
return 1600000 ;
case PHY_INTERFACE_MODE_1000BASEX:
case PHY_INTERFACE_MODE_2500BASEX:
return 10000000 ;
default :
return -EINVAL;
}
}
/**
* phylink_mac_implements_lpi ( ) - determine if MAC implements LPI ops
* @ ops : phylink_mac_ops structure
*
* Returns true if the phylink MAC operations structure indicates that the
* LPI operations have been implemented , false otherwise .
*/
static inline bool phylink_mac_implements_lpi(const struct phylink_mac_ops *ops)
{
return ops && ops->mac_disable_tx_lpi && ops->mac_enable_tx_lpi;
}
void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state,
unsigned int neg_mode, u16 bmsr, u16 lpa);
void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs,
unsigned int neg_mode,
struct phylink_link_state *state);
int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface,
const unsigned long *advertising);
int phylink_mii_c22_pcs_config(struct mdio_device *pcs,
phy_interface_t interface,
const unsigned long *advertising,
unsigned int neg_mode);
void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs);
void phylink_resolve_c73(struct phylink_link_state *state);
void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,
struct phylink_link_state *state);
void phylink_decode_usxgmii_word(struct phylink_link_state *state,
uint16_t lpa);
#endif
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2026-10-11
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