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 enum phylink_op_type {
  58         PHYLINK_NETDEV = 0,
  59         PHYLINK_DEV,
  60 };
  61
  62 /**
  63  * struct phylink_config - PHYLINK configuration structure
  64  * @dev: a pointer to a struct device associated with the MAC
  65  * @type: operation type of PHYLINK instance
  66  * @pcs_poll: MAC PCS cannot provide link change interrupt
  67  */
  68 struct phylink_config {
  69         struct device *dev;
  70         enum phylink_op_type type;
  71         bool pcs_poll;
  72 };
  73
  74 /**
  75  * struct phylink_mac_ops - MAC operations structure.
  76  * @validate: Validate and update the link configuration.
  77  * @mac_pcs_get_state: Read the current link state from the hardware.
  78  * @mac_config: configure the MAC for the selected mode and state.
  79  * @mac_an_restart: restart 802.3z BaseX autonegotiation.
  80  * @mac_link_down: take the link down.
  81  * @mac_link_up: allow the link to come up.
  82  *
  83  * The individual methods are described more fully below.
  84  */
  85 struct phylink_mac_ops {
  86         void (*validate)(struct phylink_config *config,
  87                          unsigned long *supported,
  88                          struct phylink_link_state *state);
  89         void (*mac_pcs_get_state)(struct phylink_config *config,
  90                                   struct phylink_link_state *state);
  91         void (*mac_config)(struct phylink_config *config, unsigned int mode,
  92                            const struct phylink_link_state *state);
  93         void (*mac_an_restart)(struct phylink_config *config);
  94         void (*mac_link_down)(struct phylink_config *config, unsigned int mode,
  95                               phy_interface_t interface);
  96         void (*mac_link_up)(struct phylink_config *config, unsigned int mode,
  97                             phy_interface_t interface,
  98                             struct phy_device *phy);
  99 };
 100
 101 #if 0 /* For kernel-doc purposes only. */
 102 /**
 103  * validate - Validate and update the link configuration
 104  * @config: a pointer to a &struct phylink_config.
 105  * @supported: ethtool bitmask for supported link modes.
 106  * @state: a pointer to a &struct phylink_link_state.
 107  *
 108  * Clear bits in the @supported and @state->advertising masks that
 109  * are not supportable by the MAC.
 110  *
 111  * Note that the PHY may be able to transform from one connection
 112  * technology to another, so, eg, don't clear 1000BaseX just
 113  * because the MAC is unable to BaseX mode. This is more about
 114  * clearing unsupported speeds and duplex settings. The port modes
 115  * should not be cleared; phylink_set_port_modes() will help with this.
 116  *
 117  * If the @state->interface mode is %PHY_INTERFACE_MODE_1000BASEX
 118  * or %PHY_INTERFACE_MODE_2500BASEX, select the appropriate mode
 119  * based on @state->advertising and/or @state->speed and update
 120  * @state->interface accordingly. See phylink_helper_basex_speed().
 121  *
 122  * When @state->interface is %PHY_INTERFACE_MODE_NA, phylink expects the
 123  * MAC driver to return all supported link modes.
 124  *
 125  * If the @state->interface mode is not supported, then the @supported
 126  * mask must be cleared.
 127  */
 128 void validate(struct phylink_config *config, unsigned long *supported,
 129               struct phylink_link_state *state);
 130
 131 /**
 132  * mac_pcs_get_state() - Read the current inband link state from the hardware
 133  * @config: a pointer to a &struct phylink_config.
 134  * @state: a pointer to a &struct phylink_link_state.
 135  *
 136  * Read the current inband link state from the MAC PCS, reporting the
 137  * current speed in @state->speed, duplex mode in @state->duplex, pause
 138  * mode in @state->pause using the %MLO_PAUSE_RX and %MLO_PAUSE_TX bits,
 139  * negotiation completion state in @state->an_complete, and link up state
 140  * in @state->link. If possible, @state->lp_advertising should also be
 141  * populated.
 142  */
 143 void mac_pcs_get_state(struct phylink_config *config,
 144                        struct phylink_link_state *state);
 145
 146 /**
 147  * mac_config() - configure the MAC for the selected mode and state
 148  * @config: a pointer to a &struct phylink_config.
 149  * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
 150  * @state: a pointer to a &struct phylink_link_state.
 151  *
 152  * Note - not all members of @state are valid.  In particular,
 153  * @state->lp_advertising, @state->link, @state->an_complete are never
 154  * guaranteed to be correct, and so any mac_config() implementation must
 155  * never reference these fields.
 156  *
 157  * The action performed depends on the currently selected mode:
 158  *
 159  * %MLO_AN_FIXED, %MLO_AN_PHY:
 160  *   Configure the specified @state->speed, @state->duplex and
 161  *   @state->pause (%MLO_PAUSE_TX / %MLO_PAUSE_RX) modes over a link
 162  *   specified by @state->interface.  @state->advertising may be used,
 163  *   but is not required.  Other members of @state must be ignored.
 164  *
 165  *   Valid state members: interface, speed, duplex, pause, advertising.
 166  *
 167  * %MLO_AN_INBAND:
 168  *   place the link in an inband negotiation mode (such as 802.3z
 169  *   1000base-X or Cisco SGMII mode depending on the @state->interface
 170  *   mode). In both cases, link state management (whether the link
 171  *   is up or not) is performed by the MAC, and reported via the
 172  *   mac_pcs_get_state() callback. Changes in link state must be made
 173  *   by calling phylink_mac_change().
 174  *
 175  *   If in 802.3z mode, the link speed is fixed, dependent on the
 176  *   @state->interface. Duplex is negotiated, and pause is advertised
 177  *   according to @state->an_enabled, @state->pause and
 178  *   @state->advertising flags. Beware of MACs which only support full
 179  *   duplex at gigabit and higher speeds.
 180  *
 181  *   If in Cisco SGMII mode, the link speed and duplex mode are passed
 182  *   in the serial bitstream 16-bit configuration word, and the MAC
 183  *   should be configured to read these bits and acknowledge the
 184  *   configuration word. Nothing is advertised by the MAC. The MAC is
 185  *   responsible for reading the configuration word and configuring
 186  *   itself accordingly.
 187  *
 188  *   Valid state members: interface, an_enabled, pause, advertising.
 189  *
 190  * Implementations are expected to update the MAC to reflect the
 191  * requested settings - i.o.w., if nothing has changed between two
 192  * calls, no action is expected.  If only flow control settings have
 193  * changed, flow control should be updated *without* taking the link
 194  * down.  This "update" behaviour is critical to avoid bouncing the
 195  * link up status.
 196  */
 197 void mac_config(struct phylink_config *config, unsigned int mode,
 198                 const struct phylink_link_state *state);
 199
 200 /**
 201  * mac_an_restart() - restart 802.3z BaseX autonegotiation
 202  * @config: a pointer to a &struct phylink_config.
 203  */
 204 void mac_an_restart(struct phylink_config *config);
 205
 206 /**
 207  * mac_link_down() - take the link down
 208  * @config: a pointer to a &struct phylink_config.
 209  * @mode: link autonegotiation mode
 210  * @interface: link &typedef phy_interface_t mode
 211  *
 212  * If @mode is not an in-band negotiation mode (as defined by
 213  * phylink_autoneg_inband()), force the link down and disable any
 214  * Energy Efficient Ethernet MAC configuration. Interface type
 215  * selection must be done in mac_config().
 216  */
 217 void mac_link_down(struct phylink_config *config, unsigned int mode,
 218                    phy_interface_t interface);
 219
 220 /**
 221  * mac_link_up() - allow the link to come up
 222  * @config: a pointer to a &struct phylink_config.
 223  * @mode: link autonegotiation mode
 224  * @interface: link &typedef phy_interface_t mode
 225  * @phy: any attached phy
 226  *
 227  * If @mode is not an in-band negotiation mode (as defined by
 228  * phylink_autoneg_inband()), allow the link to come up. If @phy
 229  * is non-%NULL, configure Energy Efficient Ethernet by calling
 230  * phy_init_eee() and perform appropriate MAC configuration for EEE.
 231  * Interface type selection must be done in mac_config().
 232  */
 233 void mac_link_up(struct phylink_config *config, unsigned int mode,
 234                  phy_interface_t interface,
 235                  struct phy_device *phy);
 236 #endif
 237
 238 struct phylink *phylink_create(struct phylink_config *, struct fwnode_handle *,
 239                                phy_interface_t iface,
 240                                const struct phylink_mac_ops *ops);
 241 void phylink_destroy(struct phylink *);
 242
 243 int phylink_connect_phy(struct phylink *, struct phy_device *);
 244 int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags);
 245 void phylink_disconnect_phy(struct phylink *);
 246 int phylink_fixed_state_cb(struct phylink *,
 247                            void (*cb)(struct net_device *dev,
 248                                       struct phylink_link_state *));
 249
 250 void phylink_mac_change(struct phylink *, bool up);
 251
 252 void phylink_start(struct phylink *);
 253 void phylink_stop(struct phylink *);
 254
 255 void phylink_ethtool_get_wol(struct phylink *, struct ethtool_wolinfo *);
 256 int phylink_ethtool_set_wol(struct phylink *, struct ethtool_wolinfo *);
 257
 258 int phylink_ethtool_ksettings_get(struct phylink *,
 259                                   struct ethtool_link_ksettings *);
 260 int phylink_ethtool_ksettings_set(struct phylink *,
 261                                   const struct ethtool_link_ksettings *);
 262 int phylink_ethtool_nway_reset(struct phylink *);
 263 void phylink_ethtool_get_pauseparam(struct phylink *,
 264                                     struct ethtool_pauseparam *);
 265 int phylink_ethtool_set_pauseparam(struct phylink *,
 266                                    struct ethtool_pauseparam *);
 267 int phylink_get_eee_err(struct phylink *);
 268 int phylink_init_eee(struct phylink *, bool);
 269 int phylink_ethtool_get_eee(struct phylink *, struct ethtool_eee *);
 270 int phylink_ethtool_set_eee(struct phylink *, struct ethtool_eee *);
 271 int phylink_mii_ioctl(struct phylink *, struct ifreq *, int);
 272
 273 #define phylink_zero(bm) \
 274         bitmap_zero(bm, __ETHTOOL_LINK_MODE_MASK_NBITS)
 275 #define __phylink_do_bit(op, bm, mode) \
 276         op(ETHTOOL_LINK_MODE_ ## mode ## _BIT, bm)
 277
 278 #define phylink_set(bm, mode)   __phylink_do_bit(__set_bit, bm, mode)
 279 #define phylink_clear(bm, mode) __phylink_do_bit(__clear_bit, bm, mode)
 280 #define phylink_test(bm, mode)  __phylink_do_bit(test_bit, bm, mode)
 281
 282 void phylink_set_port_modes(unsigned long *bits);
 283 void phylink_helper_basex_speed(struct phylink_link_state *state);
 284
 285 #endif