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linux_dsm_epyc7002/include/linux/phylink.h
Russell King 624c0f0239 phylink: add helper for configuring 2500BaseX modes 
Add a helper for MAC drivers to use in their validate callback to deal
with 2500BaseX vs 1000BaseX modes, where the hardware supports both
but it is not possible to automatically select between them.

This helper defaults to 1000BaseX, as that is the 802.3 standard, and
will allow users to select 2500BaseX either by forcing the speed if
AN is disabled, or by changing the advertising mask if AN is enabled.
Disabling AN is not recommended as it is only the speed that we're
interested in controlling, not the duplex or pause mode parameters.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-09 11:08:19 -07:00

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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_ASYM = BIT(0),
MLO_PAUSE_SYM = BIT(1),
MLO_PAUSE_RX = BIT(2),
MLO_PAUSE_TX = BIT(3),
MLO_PAUSE_TXRX_MASK = MLO_PAUSE_TX | MLO_PAUSE_RX,
MLO_PAUSE_AN = BIT(4),
MLO_AN_PHY = 0, /* Conventional PHY */
MLO_AN_FIXED, /* Fixed-link mode */
MLO_AN_INBAND, /* In-band protocol */
};
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;
};
/**
* struct phylink_mac_ops - MAC operations structure.
* @validate: Validate and update the link configuration.
* @mac_link_state: Read the current link state from the hardware.
* @mac_config: configure the MAC for the selected mode and state.
* @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 net_device *ndev, unsigned long *supported,
struct phylink_link_state *state);
int (*mac_link_state)(struct net_device *ndev,
struct phylink_link_state *state);
void (*mac_config)(struct net_device *ndev, unsigned int mode,
const struct phylink_link_state *state);
void (*mac_an_restart)(struct net_device *ndev);
void (*mac_link_down)(struct net_device *ndev, unsigned int mode,
phy_interface_t interface);
void (*mac_link_up)(struct net_device *ndev, unsigned int mode,
phy_interface_t interface,
struct phy_device *phy);
};
#if 0 /* For kernel-doc purposes only. */
/**
* validate - Validate and update the link configuration
* @ndev: a pointer to a &struct net_device for the MAC.
* @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.
*
* 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.
*/
void validate(struct net_device *ndev, unsigned long *supported,
struct phylink_link_state *state);
/**
* mac_link_state() - Read the current link state from the hardware
* @ndev: a pointer to a &struct net_device for the MAC.
* @state: a pointer to a &struct phylink_link_state.
*
* Read the current link state from the MAC, 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.
*/
int mac_link_state(struct net_device *ndev,
struct phylink_link_state *state);
/**
* mac_config() - configure the MAC for the selected mode and state
* @ndev: a pointer to a &struct net_device for the MAC.
* @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
* @state: a pointer to a &struct phylink_link_state.
*
* The action performed depends on the currently selected mode:
*
* %MLO_AN_FIXED, %MLO_AN_PHY:
* Configure the specified @state->speed, @state->duplex and
* @state->pause (%MLO_PAUSE_TX / %MLO_PAUSE_RX) mode.
*
* %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_link_state() callback. Changes in link state must be made
* by calling phylink_mac_change().
*
* If in 802.3z mode, the link speed is fixed, dependent on the
* @state->interface. Duplex is negotiated, and pause is advertised
* according to @state->an_enabled, @state->pause 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.
*/
void mac_config(struct net_device *ndev, unsigned int mode,
const struct phylink_link_state *state);
/**
* mac_an_restart() - restart 802.3z BaseX autonegotiation
* @ndev: a pointer to a &struct net_device for the MAC.
*/
void mac_an_restart(struct net_device *ndev);
/**
* mac_link_down() - take the link down
* @ndev: a pointer to a &struct net_device for the MAC.
* @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 net_device *ndev, unsigned int mode,
phy_interface_t interface);
/**
* mac_link_up() - allow the link to come up
* @ndev: a pointer to a &struct net_device for the MAC.
* @mode: link autonegotiation mode
* @interface: link &typedef phy_interface_t mode
* @phy: any attached phy
*
* If @mode is not an in-band negotiation mode (as defined by
* phylink_autoneg_inband()), 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 net_device *ndev, unsigned int mode,
phy_interface_t interface,
struct phy_device *phy);
#endif
struct phylink *phylink_create(struct net_device *, struct fwnode_handle *,
phy_interface_t iface, const struct phylink_mac_ops *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);
void phylink_disconnect_phy(struct phylink *);
int phylink_fixed_state_cb(struct phylink *,
void (*cb)(struct net_device *dev,
struct phylink_link_state *));
void phylink_mac_change(struct phylink *, bool up);
void phylink_start(struct phylink *);
void phylink_stop(struct phylink *);
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 *, struct ethtool_eee *);
int phylink_ethtool_set_eee(struct phylink *, struct ethtool_eee *);
int phylink_mii_ioctl(struct phylink *, struct ifreq *, int);
#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);
#endif
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