include/linux/phylink.h

   1 #ifndef NETDEV_PCS_H
   2 #define NETDEV_PCS_H
   3
   4 #include <linux/phy.h>
   5 #include <linux/spinlock.h>
   6 #include <linux/workqueue.h>
   7
   8 struct device_node;
   9 struct ethtool_cmd;
  10 struct fwnode_handle;
  11 struct net_device;
  12
  13 enum {
  14         MLO_PAUSE_NONE,
  15         MLO_PAUSE_ASYM = BIT(0),
  16         MLO_PAUSE_SYM = BIT(1),
  17         MLO_PAUSE_RX = BIT(2),
  18         MLO_PAUSE_TX = BIT(3),
  19         MLO_PAUSE_TXRX_MASK = MLO_PAUSE_TX | MLO_PAUSE_RX,
  20         MLO_PAUSE_AN = BIT(4),
  21
  22         MLO_AN_PHY = 0, /* Conventional PHY */
  23         MLO_AN_FIXED,   /* Fixed-link mode */
  24         MLO_AN_INBAND,  /* In-band protocol */
  25 };
  26
  27 static inline bool phylink_autoneg_inband(unsigned int mode)
  28 {
  29         return mode == MLO_AN_INBAND;
  30 }
  31
  32 /**
  33  * struct phylink_link_state - link state structure
  34  * @advertising: ethtool bitmask containing advertised link modes
  35  * @lp_advertising: ethtool bitmask containing link partner advertised link
  36  *   modes
  37  * @interface: link &typedef phy_interface_t mode
  38  * @speed: link speed, one of the SPEED_* constants.
  39  * @duplex: link duplex mode, one of DUPLEX_* constants.
  40  * @pause: link pause state, described by MLO_PAUSE_* constants.
  41  * @link: true if the link is up.
  42  * @an_enabled: true if autonegotiation is enabled/desired.
  43  * @an_complete: true if autonegotiation has completed.
  44  */
  45 struct phylink_link_state {
  46         __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
  47         __ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising);
  48         phy_interface_t interface;
  49         int speed;
  50         int duplex;
  51         int pause;
  52         unsigned int link:1;
  53         unsigned int an_enabled:1;
  54         unsigned int an_complete:1;
  55 };
  56
  57 /**
  58  * struct phylink_mac_ops - MAC operations structure.
  59  * @validate: Validate and update the link configuration.
  60  * @mac_link_state: Read the current link state from the hardware.
  61  * @mac_config: configure the MAC for the selected mode and state.
  62  * @mac_an_restart: restart 802.3z BaseX autonegotiation.
  63  * @mac_link_down: take the link down.
  64  * @mac_link_up: allow the link to come up.
  65  *
  66  * The individual methods are described more fully below.
  67  */
  68 struct phylink_mac_ops {
  69         void (*validate)(struct net_device *ndev, unsigned long *supported,
  70                          struct phylink_link_state *state);
  71         int (*mac_link_state)(struct net_device *ndev,
  72                               struct phylink_link_state *state);
  73         void (*mac_config)(struct net_device *ndev, unsigned int mode,
  74                            const struct phylink_link_state *state);
  75         void (*mac_an_restart)(struct net_device *ndev);
  76         void (*mac_link_down)(struct net_device *ndev, unsigned int mode,
  77                               phy_interface_t interface);
  78         void (*mac_link_up)(struct net_device *ndev, unsigned int mode,
  79                             phy_interface_t interface,
  80                             struct phy_device *phy);
  81 };
  82
  83 #if 0 /* For kernel-doc purposes only. */
  84 /**
  85  * validate - Validate and update the link configuration
  86  * @ndev: a pointer to a &struct net_device for the MAC.
  87  * @supported: ethtool bitmask for supported link modes.
  88  * @state: a pointer to a &struct phylink_link_state.
  89  *
  90  * Clear bits in the @supported and @state->advertising masks that
  91  * are not supportable by the MAC.
  92  *
  93  * Note that the PHY may be able to transform from one connection
  94  * technology to another, so, eg, don't clear 1000BaseX just
  95  * because the MAC is unable to BaseX mode. This is more about
  96  * clearing unsupported speeds and duplex settings.
  97  *
  98  * If the @state->interface mode is %PHY_INTERFACE_MODE_1000BASEX
  99  * or %PHY_INTERFACE_MODE_2500BASEX, select the appropriate mode
 100  * based on @state->advertising and/or @state->speed and update
 101  * @state->interface accordingly.
 102  */
 103 void validate(struct net_device *ndev, unsigned long *supported,
 104               struct phylink_link_state *state);
 105
 106 /**
 107  * mac_link_state() - Read the current link state from the hardware
 108  * @ndev: a pointer to a &struct net_device for the MAC.
 109  * @state: a pointer to a &struct phylink_link_state.
 110  *
 111  * Read the current link state from the MAC, reporting the current
 112  * speed in @state->speed, duplex mode in @state->duplex, pause mode
 113  * in @state->pause using the %MLO_PAUSE_RX and %MLO_PAUSE_TX bits,
 114  * negotiation completion state in @state->an_complete, and link
 115  * up state in @state->link.
 116  */
 117 int mac_link_state(struct net_device *ndev,
 118                    struct phylink_link_state *state);
 119
 120 /**
 121  * mac_config() - configure the MAC for the selected mode and state
 122  * @ndev: a pointer to a &struct net_device for the MAC.
 123  * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
 124  * @state: a pointer to a &struct phylink_link_state.
 125  *
 126  * The action performed depends on the currently selected mode:
 127  *
 128  * %MLO_AN_FIXED, %MLO_AN_PHY:
 129  *   Configure the specified @state->speed, @state->duplex and
 130  *   @state->pause (%MLO_PAUSE_TX / %MLO_PAUSE_RX) mode.
 131  *
 132  * %MLO_AN_INBAND:
 133  *   place the link in an inband negotiation mode (such as 802.3z
 134  *   1000base-X or Cisco SGMII mode depending on the @state->interface
 135  *   mode). In both cases, link state management (whether the link
 136  *   is up or not) is performed by the MAC, and reported via the
 137  *   mac_link_state() callback. Changes in link state must be made
 138  *   by calling phylink_mac_change().
 139  *
 140  *   If in 802.3z mode, the link speed is fixed, dependent on the
 141  *   @state->interface. Duplex is negotiated, and pause is advertised
 142  *   according to @state->an_enabled, @state->pause and
 143  *   @state->advertising flags. Beware of MACs which only support full
 144  *   duplex at gigabit and higher speeds.
 145  *
 146  *   If in Cisco SGMII mode, the link speed and duplex mode are passed
 147  *   in the serial bitstream 16-bit configuration word, and the MAC
 148  *   should be configured to read these bits and acknowledge the
 149  *   configuration word. Nothing is advertised by the MAC. The MAC is
 150  *   responsible for reading the configuration word and configuring
 151  *   itself accordingly.
 152  *
 153  * Implementations are expected to update the MAC to reflect the
 154  * requested settings - i.o.w., if nothing has changed between two
 155  * calls, no action is expected.  If only flow control settings have
 156  * changed, flow control should be updated *without* taking the link
 157  * down.  This "update" behaviour is critical to avoid bouncing the
 158  * link up status.
 159  */
 160 void mac_config(struct net_device *ndev, unsigned int mode,
 161                 const struct phylink_link_state *state);
 162
 163 /**
 164  * mac_an_restart() - restart 802.3z BaseX autonegotiation
 165  * @ndev: a pointer to a &struct net_device for the MAC.
 166  */
 167 void mac_an_restart(struct net_device *ndev);
 168
 169 /**
 170  * mac_link_down() - take the link down
 171  * @ndev: a pointer to a &struct net_device for the MAC.
 172  * @mode: link autonegotiation mode
 173  * @interface: link &typedef phy_interface_t mode
 174  *
 175  * If @mode is not an in-band negotiation mode (as defined by
 176  * phylink_autoneg_inband()), force the link down and disable any
 177  * Energy Efficient Ethernet MAC configuration. Interface type
 178  * selection must be done in mac_config().
 179  */
 180 void mac_link_down(struct net_device *ndev, unsigned int mode,
 181                    phy_interface_t interface);
 182
 183 /**
 184  * mac_link_up() - allow the link to come up
 185  * @ndev: a pointer to a &struct net_device for the MAC.
 186  * @mode: link autonegotiation mode
 187  * @interface: link &typedef phy_interface_t mode
 188  * @phy: any attached phy
 189  *
 190  * If @mode is not an in-band negotiation mode (as defined by
 191  * phylink_autoneg_inband()), allow the link to come up. If @phy
 192  * is non-%NULL, configure Energy Efficient Ethernet by calling
 193  * phy_init_eee() and perform appropriate MAC configuration for EEE.
 194  * Interface type selection must be done in mac_config().
 195  */
 196 void mac_link_up(struct net_device *ndev, unsigned int mode,
 197                  phy_interface_t interface,
 198                  struct phy_device *phy);
 199 #endif
 200
 201 struct phylink *phylink_create(struct net_device *, struct fwnode_handle *,
 202         phy_interface_t iface, const struct phylink_mac_ops *ops);
 203 void phylink_destroy(struct phylink *);
 204
 205 int phylink_connect_phy(struct phylink *, struct phy_device *);
 206 int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags);
 207 void phylink_disconnect_phy(struct phylink *);
 208 int phylink_fixed_state_cb(struct phylink *,
 209                            void (*cb)(struct net_device *dev,
 210                                       struct phylink_link_state *));
 211
 212 void phylink_mac_change(struct phylink *, bool up);
 213
 214 void phylink_start(struct phylink *);
 215 void phylink_stop(struct phylink *);
 216
 217 void phylink_ethtool_get_wol(struct phylink *, struct ethtool_wolinfo *);
 218 int phylink_ethtool_set_wol(struct phylink *, struct ethtool_wolinfo *);
 219
 220 int phylink_ethtool_ksettings_get(struct phylink *,
 221                                   struct ethtool_link_ksettings *);
 222 int phylink_ethtool_ksettings_set(struct phylink *,
 223                                   const struct ethtool_link_ksettings *);
 224 int phylink_ethtool_nway_reset(struct phylink *);
 225 void phylink_ethtool_get_pauseparam(struct phylink *,
 226                                     struct ethtool_pauseparam *);
 227 int phylink_ethtool_set_pauseparam(struct phylink *,
 228                                    struct ethtool_pauseparam *);
 229 int phylink_get_eee_err(struct phylink *);
 230 int phylink_init_eee(struct phylink *, bool);
 231 int phylink_ethtool_get_eee(struct phylink *, struct ethtool_eee *);
 232 int phylink_ethtool_set_eee(struct phylink *, struct ethtool_eee *);
 233 int phylink_mii_ioctl(struct phylink *, struct ifreq *, int);
 234
 235 #define phylink_zero(bm) \
 236         bitmap_zero(bm, __ETHTOOL_LINK_MODE_MASK_NBITS)
 237 #define __phylink_do_bit(op, bm, mode) \
 238         op(ETHTOOL_LINK_MODE_ ## mode ## _BIT, bm)
 239
 240 #define phylink_set(bm, mode)   __phylink_do_bit(__set_bit, bm, mode)
 241 #define phylink_clear(bm, mode) __phylink_do_bit(__clear_bit, bm, mode)
 242 #define phylink_test(bm, mode)  __phylink_do_bit(test_bit, bm, mode)
 243
 244 void phylink_set_port_modes(unsigned long *bits);
 245 void phylink_helper_basex_speed(struct phylink_link_state *state);
 246
 247 #endif