v4.19.13 snapshot.
diff --git a/include/linux/phylink.h b/include/linux/phylink.h
new file mode 100644
index 0000000..021fc65
--- /dev/null
+++ b/include/linux/phylink.h
@@ -0,0 +1,239 @@
+#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