drivers/net/phy/phylink.c

   1 /*
   2  * phylink models the MAC to optional PHY connection, supporting
   3  * technologies such as SFP cages where the PHY is hot-pluggable.
   4  *
   5  * Copyright (C) 2015 Russell King
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11 #include <linux/ethtool.h>
  12 #include <linux/export.h>
  13 #include <linux/gpio/consumer.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/of.h>
  16 #include <linux/of_mdio.h>
  17 #include <linux/phy.h>
  18 #include <linux/phy_fixed.h>
  19 #include <linux/phylink.h>
  20 #include <linux/rtnetlink.h>
  21 #include <linux/spinlock.h>
  22 #include <linux/workqueue.h>
  23
  24 #include "sfp.h"
  25 #include "swphy.h"
  26
  27 #define SUPPORTED_INTERFACES \
  28         (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \
  29          SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane)
  30 #define ADVERTISED_INTERFACES \
  31         (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \
  32          ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane)
  33
  34 enum {
  35         PHYLINK_DISABLE_STOPPED,
  36         PHYLINK_DISABLE_LINK,
  37 };
  38
  39 struct phylink {
  40         struct net_device *netdev;
  41         const struct phylink_mac_ops *ops;
  42
  43         unsigned long phylink_disable_state; /* bitmask of disables */
  44         struct phy_device *phydev;
  45         phy_interface_t link_interface; /* PHY_INTERFACE_xxx */
  46         u8 link_an_mode;                /* MLO_AN_xxx */
  47         u8 link_port;                   /* The current non-phy ethtool port */
  48         __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
  49
  50         /* The link configuration settings */
  51         struct phylink_link_state link_config;
  52         struct gpio_desc *link_gpio;
  53
  54         struct mutex state_mutex;
  55         struct phylink_link_state phy_state;
  56         struct work_struct resolve;
  57
  58         bool mac_link_dropped;
  59
  60         struct sfp_bus *sfp_bus;
  61 };
  62
  63 static inline void linkmode_zero(unsigned long *dst)
  64 {
  65         bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
  66 }
  67
  68 static inline void linkmode_copy(unsigned long *dst, const unsigned long *src)
  69 {
  70         bitmap_copy(dst, src, __ETHTOOL_LINK_MODE_MASK_NBITS);
  71 }
  72
  73 static inline void linkmode_and(unsigned long *dst, const unsigned long *a,
  74                                 const unsigned long *b)
  75 {
  76         bitmap_and(dst, a, b, __ETHTOOL_LINK_MODE_MASK_NBITS);
  77 }
  78
  79 static inline void linkmode_or(unsigned long *dst, const unsigned long *a,
  80                                 const unsigned long *b)
  81 {
  82         bitmap_or(dst, a, b, __ETHTOOL_LINK_MODE_MASK_NBITS);
  83 }
  84
  85 static inline bool linkmode_empty(const unsigned long *src)
  86 {
  87         return bitmap_empty(src, __ETHTOOL_LINK_MODE_MASK_NBITS);
  88 }
  89
  90 void phylink_set_port_modes(unsigned long *mask)
  91 {
  92         phylink_set(mask, TP);
  93         phylink_set(mask, AUI);
  94         phylink_set(mask, MII);
  95         phylink_set(mask, FIBRE);
  96         phylink_set(mask, BNC);
  97         phylink_set(mask, Backplane);
  98 }
  99 EXPORT_SYMBOL_GPL(phylink_set_port_modes);
 100
 101 static int phylink_is_empty_linkmode(const unsigned long *linkmode)
 102 {
 103         __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, };
 104
 105         phylink_set_port_modes(tmp);
 106         phylink_set(tmp, Autoneg);
 107         phylink_set(tmp, Pause);
 108         phylink_set(tmp, Asym_Pause);
 109
 110         bitmap_andnot(tmp, linkmode, tmp, __ETHTOOL_LINK_MODE_MASK_NBITS);
 111
 112         return linkmode_empty(tmp);
 113 }
 114
 115 static const char *phylink_an_mode_str(unsigned int mode)
 116 {
 117         static const char *modestr[] = {
 118                 [MLO_AN_PHY] = "phy",
 119                 [MLO_AN_FIXED] = "fixed",
 120                 [MLO_AN_SGMII] = "SGMII",
 121                 [MLO_AN_8023Z] = "802.3z",
 122         };
 123
 124         return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
 125 }
 126
 127 static int phylink_validate(struct phylink *pl, unsigned long *supported,
 128                             struct phylink_link_state *state)
 129 {
 130         pl->ops->validate(pl->netdev, supported, state);
 131
 132         return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
 133 }
 134
 135 static int phylink_parse_fixedlink(struct phylink *pl, struct device_node *np)
 136 {
 137         struct device_node *fixed_node;
 138         const struct phy_setting *s;
 139         struct gpio_desc *desc;
 140         const __be32 *fixed_prop;
 141         u32 speed;
 142         int ret, len;
 143
 144         fixed_node = of_get_child_by_name(np, "fixed-link");
 145         if (fixed_node) {
 146                 ret = of_property_read_u32(fixed_node, "speed", &speed);
 147
 148                 pl->link_config.speed = speed;
 149                 pl->link_config.duplex = DUPLEX_HALF;
 150
 151                 if (of_property_read_bool(fixed_node, "full-duplex"))
 152                         pl->link_config.duplex = DUPLEX_FULL;
 153
 154                 /* We treat the "pause" and "asym-pause" terminology as
 155                  * defining the link partner's ability. */
 156                 if (of_property_read_bool(fixed_node, "pause"))
 157                         pl->link_config.pause |= MLO_PAUSE_SYM;
 158                 if (of_property_read_bool(fixed_node, "asym-pause"))
 159                         pl->link_config.pause |= MLO_PAUSE_ASYM;
 160
 161                 if (ret == 0) {
 162                         desc = fwnode_get_named_gpiod(&fixed_node->fwnode,
 163                                                       "link-gpios", 0,
 164                                                       GPIOD_IN, "?");
 165
 166                         if (!IS_ERR(desc))
 167                                 pl->link_gpio = desc;
 168                         else if (desc == ERR_PTR(-EPROBE_DEFER))
 169                                 ret = -EPROBE_DEFER;
 170                 }
 171                 of_node_put(fixed_node);
 172
 173                 if (ret)
 174                         return ret;
 175         } else {
 176                 fixed_prop = of_get_property(np, "fixed-link", &len);
 177                 if (!fixed_prop) {
 178                         netdev_err(pl->netdev, "broken fixed-link?\n");
 179                         return -EINVAL;
 180                 }
 181                 if (len == 5 * sizeof(*fixed_prop)) {
 182                         pl->link_config.duplex = be32_to_cpu(fixed_prop[1]) ?
 183                                                 DUPLEX_FULL : DUPLEX_HALF;
 184                         pl->link_config.speed = be32_to_cpu(fixed_prop[2]);
 185                         if (be32_to_cpu(fixed_prop[3]))
 186                                 pl->link_config.pause |= MLO_PAUSE_SYM;
 187                         if (be32_to_cpu(fixed_prop[4]))
 188                                 pl->link_config.pause |= MLO_PAUSE_ASYM;
 189                 }
 190         }
 191
 192         if (pl->link_config.speed > SPEED_1000 &&
 193             pl->link_config.duplex != DUPLEX_FULL)
 194                 netdev_warn(pl->netdev, "fixed link specifies half duplex for %dMbps link?\n",
 195                             pl->link_config.speed);
 196
 197         bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
 198         linkmode_copy(pl->link_config.advertising, pl->supported);
 199         phylink_validate(pl, pl->supported, &pl->link_config);
 200
 201         s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
 202                                pl->supported,
 203                                __ETHTOOL_LINK_MODE_MASK_NBITS, true);
 204         linkmode_zero(pl->supported);
 205         phylink_set(pl->supported, MII);
 206         if (s) {
 207                 __set_bit(s->bit, pl->supported);
 208         } else {
 209                 netdev_warn(pl->netdev, "fixed link %s duplex %dMbps not recognised\n",
 210                             pl->link_config.duplex == DUPLEX_FULL ? "full" : "half",
 211                             pl->link_config.speed);
 212         }
 213
 214         linkmode_and(pl->link_config.advertising, pl->link_config.advertising,
 215                      pl->supported);
 216
 217         pl->link_config.link = 1;
 218         pl->link_config.an_complete = 1;
 219
 220         return 0;
 221 }
 222
 223 static int phylink_parse_mode(struct phylink *pl, struct device_node *np)
 224 {
 225         struct device_node *dn;
 226         const char *managed;
 227
 228         dn = of_get_child_by_name(np, "fixed-link");
 229         if (dn || of_find_property(np, "fixed-link", NULL))
 230                 pl->link_an_mode = MLO_AN_FIXED;
 231         of_node_put(dn);
 232
 233         if (of_property_read_string(np, "managed", &managed) == 0 &&
 234             strcmp(managed, "in-band-status") == 0) {
 235                 if (pl->link_an_mode == MLO_AN_FIXED) {
 236                         netdev_err(pl->netdev,
 237                                    "can't use both fixed-link and in-band-status\n");
 238                         return -EINVAL;
 239                 }
 240
 241                 linkmode_zero(pl->supported);
 242                 phylink_set(pl->supported, MII);
 243                 phylink_set(pl->supported, Autoneg);
 244                 phylink_set(pl->supported, Asym_Pause);
 245                 phylink_set(pl->supported, Pause);
 246                 pl->link_config.an_enabled = true;
 247
 248                 switch (pl->link_config.interface) {
 249                 case PHY_INTERFACE_MODE_SGMII:
 250                         phylink_set(pl->supported, 10baseT_Half);
 251                         phylink_set(pl->supported, 10baseT_Full);
 252                         phylink_set(pl->supported, 100baseT_Half);
 253                         phylink_set(pl->supported, 100baseT_Full);
 254                         phylink_set(pl->supported, 1000baseT_Half);
 255                         phylink_set(pl->supported, 1000baseT_Full);
 256                         pl->link_an_mode = MLO_AN_SGMII;
 257                         break;
 258
 259                 case PHY_INTERFACE_MODE_1000BASEX:
 260                         phylink_set(pl->supported, 1000baseX_Full);
 261                         pl->link_an_mode = MLO_AN_8023Z;
 262                         break;
 263
 264                 case PHY_INTERFACE_MODE_2500BASEX:
 265                         phylink_set(pl->supported, 2500baseX_Full);
 266                         pl->link_an_mode = MLO_AN_8023Z;
 267                         break;
 268
 269                 case PHY_INTERFACE_MODE_10GKR:
 270                         phylink_set(pl->supported, 10baseT_Half);
 271                         phylink_set(pl->supported, 10baseT_Full);
 272                         phylink_set(pl->supported, 100baseT_Half);
 273                         phylink_set(pl->supported, 100baseT_Full);
 274                         phylink_set(pl->supported, 1000baseT_Half);
 275                         phylink_set(pl->supported, 1000baseT_Full);
 276                         phylink_set(pl->supported, 1000baseX_Full);
 277                         phylink_set(pl->supported, 10000baseKR_Full);
 278                         phylink_set(pl->supported, 10000baseCR_Full);
 279                         phylink_set(pl->supported, 10000baseSR_Full);
 280                         phylink_set(pl->supported, 10000baseLR_Full);
 281                         phylink_set(pl->supported, 10000baseLRM_Full);
 282                         phylink_set(pl->supported, 10000baseER_Full);
 283                         pl->link_an_mode = MLO_AN_SGMII;
 284                         break;
 285
 286                 default:
 287                         netdev_err(pl->netdev,
 288                                    "incorrect link mode %s for in-band status\n",
 289                                    phy_modes(pl->link_config.interface));
 290                         return -EINVAL;
 291                 }
 292
 293                 linkmode_copy(pl->link_config.advertising, pl->supported);
 294
 295                 if (phylink_validate(pl, pl->supported, &pl->link_config)) {
 296                         netdev_err(pl->netdev,
 297                                    "failed to validate link configuration for in-band status\n");
 298                         return -EINVAL;
 299                 }
 300         }
 301
 302         return 0;
 303 }
 304
 305 static void phylink_mac_config(struct phylink *pl,
 306                                const struct phylink_link_state *state)
 307 {
 308         netdev_dbg(pl->netdev,
 309                    "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
 310                    __func__, phylink_an_mode_str(pl->link_an_mode),
 311                    phy_modes(state->interface),
 312                    phy_speed_to_str(state->speed),
 313                    phy_duplex_to_str(state->duplex),
 314                    __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
 315                    state->pause, state->link, state->an_enabled);
 316
 317         pl->ops->mac_config(pl->netdev, pl->link_an_mode, state);
 318 }
 319
 320 static void phylink_mac_an_restart(struct phylink *pl)
 321 {
 322         if (pl->link_config.an_enabled &&
 323             (pl->link_config.interface == PHY_INTERFACE_MODE_1000BASEX ||
 324              pl->link_config.interface == PHY_INTERFACE_MODE_2500BASEX))
 325                 pl->ops->mac_an_restart(pl->netdev);
 326 }
 327
 328 static int phylink_get_mac_state(struct phylink *pl, struct phylink_link_state *state)
 329 {
 330         struct net_device *ndev = pl->netdev;
 331
 332         linkmode_copy(state->advertising, pl->link_config.advertising);
 333         linkmode_zero(state->lp_advertising);
 334         state->interface = pl->link_config.interface;
 335         state->an_enabled = pl->link_config.an_enabled;
 336         state->link = 1;
 337
 338         return pl->ops->mac_link_state(ndev, state);
 339 }
 340
 341 /* The fixed state is... fixed except for the link state,
 342  * which may be determined by a GPIO.
 343  */
 344 static void phylink_get_fixed_state(struct phylink *pl, struct phylink_link_state *state)
 345 {
 346         *state = pl->link_config;
 347         if (pl->link_gpio)
 348                 state->link = !!gpiod_get_value(pl->link_gpio);
 349 }
 350
 351 /* Flow control is resolved according to our and the link partners
 352  * advertisments using the following drawn from the 802.3 specs:
 353  *  Local device  Link partner
 354  *  Pause AsymDir Pause AsymDir Result
 355  *    1     X       1     X     TX+RX
 356  *    0     1       1     1     RX
 357  *    1     1       0     1     TX
 358  */
 359 static void phylink_resolve_flow(struct phylink *pl,
 360                                  struct phylink_link_state *state)
 361 {
 362         int new_pause = 0;
 363
 364         if (pl->link_config.pause & MLO_PAUSE_AN) {
 365                 int pause = 0;
 366
 367                 if (phylink_test(pl->link_config.advertising, Pause))
 368                         pause |= MLO_PAUSE_SYM;
 369                 if (phylink_test(pl->link_config.advertising, Asym_Pause))
 370                         pause |= MLO_PAUSE_ASYM;
 371
 372                 pause &= state->pause;
 373
 374                 if (pause & MLO_PAUSE_SYM)
 375                         new_pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
 376                 else if (pause & MLO_PAUSE_ASYM)
 377                         new_pause = state->pause & MLO_PAUSE_SYM ?
 378                                  MLO_PAUSE_RX : MLO_PAUSE_TX;
 379         } else {
 380                 new_pause = pl->link_config.pause & MLO_PAUSE_TXRX_MASK;
 381         }
 382
 383         state->pause &= ~MLO_PAUSE_TXRX_MASK;
 384         state->pause |= new_pause;
 385 }
 386
 387 static const char *phylink_pause_to_str(int pause)
 388 {
 389         switch (pause & MLO_PAUSE_TXRX_MASK) {
 390         case MLO_PAUSE_TX | MLO_PAUSE_RX:
 391                 return "rx/tx";
 392         case MLO_PAUSE_TX:
 393                 return "tx";
 394         case MLO_PAUSE_RX:
 395                 return "rx";
 396         default:
 397                 return "off";
 398         }
 399 }
 400
 401 static void phylink_resolve(struct work_struct *w)
 402 {
 403         struct phylink *pl = container_of(w, struct phylink, resolve);
 404         struct phylink_link_state link_state;
 405         struct net_device *ndev = pl->netdev;
 406
 407         mutex_lock(&pl->state_mutex);
 408         if (pl->phylink_disable_state) {
 409                 pl->mac_link_dropped = false;
 410                 link_state.link = false;
 411         } else if (pl->mac_link_dropped) {
 412                 link_state.link = false;
 413         } else {
 414                 switch (pl->link_an_mode) {
 415                 case MLO_AN_PHY:
 416                         link_state = pl->phy_state;
 417                         phylink_resolve_flow(pl, &link_state);
 418                         phylink_mac_config(pl, &link_state);
 419                         break;
 420
 421                 case MLO_AN_FIXED:
 422                         phylink_get_fixed_state(pl, &link_state);
 423                         phylink_mac_config(pl, &link_state);
 424                         break;
 425
 426                 case MLO_AN_SGMII:
 427                         phylink_get_mac_state(pl, &link_state);
 428                         if (pl->phydev) {
 429                                 bool changed = false;
 430
 431                                 link_state.link = link_state.link &&
 432                                                   pl->phy_state.link;
 433
 434                                 if (pl->phy_state.interface !=
 435                                     link_state.interface) {
 436                                         link_state.interface = pl->phy_state.interface;
 437                                         changed = true;
 438                                 }
 439
 440                                 /* Propagate the flow control from the PHY
 441                                  * to the MAC. Also propagate the interface
 442                                  * if changed.
 443                                  */
 444                                 if (pl->phy_state.link || changed) {
 445                                         link_state.pause |= pl->phy_state.pause;
 446                                         phylink_resolve_flow(pl, &link_state);
 447
 448                                         phylink_mac_config(pl, &link_state);
 449                                 }
 450                         }
 451                         break;
 452
 453                 case MLO_AN_8023Z:
 454                         phylink_get_mac_state(pl, &link_state);
 455                         break;
 456                 }
 457         }
 458
 459         if (link_state.link != netif_carrier_ok(ndev)) {
 460                 if (!link_state.link) {
 461                         netif_carrier_off(ndev);
 462                         pl->ops->mac_link_down(ndev, pl->link_an_mode);
 463                         netdev_info(ndev, "Link is Down\n");
 464                 } else {
 465                         pl->ops->mac_link_up(ndev, pl->link_an_mode,
 466                                              pl->phydev);
 467
 468                         netif_carrier_on(ndev);
 469
 470                         netdev_info(ndev,
 471                                     "Link is Up - %s/%s - flow control %s\n",
 472                                     phy_speed_to_str(link_state.speed),
 473                                     phy_duplex_to_str(link_state.duplex),
 474                                     phylink_pause_to_str(link_state.pause));
 475                 }
 476         }
 477         if (!link_state.link && pl->mac_link_dropped) {
 478                 pl->mac_link_dropped = false;
 479                 queue_work(system_power_efficient_wq, &pl->resolve);
 480         }
 481         mutex_unlock(&pl->state_mutex);
 482 }
 483
 484 static void phylink_run_resolve(struct phylink *pl)
 485 {
 486         if (!pl->phylink_disable_state)
 487                 queue_work(system_power_efficient_wq, &pl->resolve);
 488 }
 489
 490 static const struct sfp_upstream_ops sfp_phylink_ops;
 491
 492 static int phylink_register_sfp(struct phylink *pl, struct device_node *np)
 493 {
 494         struct device_node *sfp_np;
 495
 496         sfp_np = of_parse_phandle(np, "sfp", 0);
 497         if (!sfp_np)
 498                 return 0;
 499
 500         pl->sfp_bus = sfp_register_upstream(sfp_np, pl->netdev, pl,
 501                                             &sfp_phylink_ops);
 502         if (!pl->sfp_bus)
 503                 return -ENOMEM;
 504
 505         return 0;
 506 }
 507
 508 struct phylink *phylink_create(struct net_device *ndev, struct device_node *np,
 509                                phy_interface_t iface,
 510                                const struct phylink_mac_ops *ops)
 511 {
 512         struct phylink *pl;
 513         int ret;
 514
 515         pl = kzalloc(sizeof(*pl), GFP_KERNEL);
 516         if (!pl)
 517                 return ERR_PTR(-ENOMEM);
 518
 519         mutex_init(&pl->state_mutex);
 520         INIT_WORK(&pl->resolve, phylink_resolve);
 521         pl->netdev = ndev;
 522         pl->phy_state.interface = iface;
 523         pl->link_interface = iface;
 524         pl->link_port = PORT_MII;
 525         pl->link_config.interface = iface;
 526         pl->link_config.pause = MLO_PAUSE_AN;
 527         pl->link_config.speed = SPEED_UNKNOWN;
 528         pl->link_config.duplex = DUPLEX_UNKNOWN;
 529         pl->ops = ops;
 530         __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
 531
 532         bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
 533         linkmode_copy(pl->link_config.advertising, pl->supported);
 534         phylink_validate(pl, pl->supported, &pl->link_config);
 535
 536         ret = phylink_parse_mode(pl, np);
 537         if (ret < 0) {
 538                 kfree(pl);
 539                 return ERR_PTR(ret);
 540         }
 541
 542         if (pl->link_an_mode == MLO_AN_FIXED) {
 543                 ret = phylink_parse_fixedlink(pl, np);
 544                 if (ret < 0) {
 545                         kfree(pl);
 546                         return ERR_PTR(ret);
 547                 }
 548         }
 549
 550         ret = phylink_register_sfp(pl, np);
 551         if (ret < 0) {
 552                 kfree(pl);
 553                 return ERR_PTR(ret);
 554         }
 555
 556         return pl;
 557 }
 558 EXPORT_SYMBOL_GPL(phylink_create);
 559
 560 void phylink_destroy(struct phylink *pl)
 561 {
 562         if (pl->sfp_bus)
 563                 sfp_unregister_upstream(pl->sfp_bus);
 564
 565         cancel_work_sync(&pl->resolve);
 566         kfree(pl);
 567 }
 568 EXPORT_SYMBOL_GPL(phylink_destroy);
 569
 570 static void phylink_phy_change(struct phy_device *phydev, bool up,
 571                                bool do_carrier)
 572 {
 573         struct phylink *pl = phydev->phylink;
 574
 575         mutex_lock(&pl->state_mutex);
 576         pl->phy_state.speed = phydev->speed;
 577         pl->phy_state.duplex = phydev->duplex;
 578         pl->phy_state.pause = MLO_PAUSE_NONE;
 579         if (phydev->pause)
 580                 pl->phy_state.pause |= MLO_PAUSE_SYM;
 581         if (phydev->asym_pause)
 582                 pl->phy_state.pause |= MLO_PAUSE_ASYM;
 583         pl->phy_state.interface = phydev->interface;
 584         pl->phy_state.link = up;
 585         mutex_unlock(&pl->state_mutex);
 586
 587         phylink_run_resolve(pl);
 588
 589         netdev_dbg(pl->netdev, "phy link %s %s/%s/%s\n", up ? "up" : "down",
 590                    phy_modes(phydev->interface),
 591                    phy_speed_to_str(phydev->speed),
 592                    phy_duplex_to_str(phydev->duplex));
 593 }
 594
 595 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy)
 596 {
 597         struct phylink_link_state config;
 598         __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
 599         u32 advertising;
 600         int ret;
 601
 602         memset(&config, 0, sizeof(config));
 603         ethtool_convert_legacy_u32_to_link_mode(supported, phy->supported);
 604         ethtool_convert_legacy_u32_to_link_mode(config.advertising,
 605                                                 phy->advertising);
 606         config.interface = pl->link_config.interface;
 607
 608         /*
 609          * This is the new way of dealing with flow control for PHYs,
 610          * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
 611          * phy drivers should not set SUPPORTED_[Asym_]Pause") except
 612          * using our validate call to the MAC, we rely upon the MAC
 613          * clearing the bits from both supported and advertising fields.
 614          */
 615         if (phylink_test(supported, Pause))
 616                 phylink_set(config.advertising, Pause);
 617         if (phylink_test(supported, Asym_Pause))
 618                 phylink_set(config.advertising, Asym_Pause);
 619
 620         ret = phylink_validate(pl, supported, &config);
 621         if (ret)
 622                 return ret;
 623
 624         phy->phylink = pl;
 625         phy->phy_link_change = phylink_phy_change;
 626
 627         netdev_info(pl->netdev,
 628                     "PHY [%s] driver [%s]\n", dev_name(&phy->mdio.dev),
 629                     phy->drv->name);
 630
 631         mutex_lock(&phy->lock);
 632         mutex_lock(&pl->state_mutex);
 633         pl->netdev->phydev = phy;
 634         pl->phydev = phy;
 635         linkmode_copy(pl->supported, supported);
 636         linkmode_copy(pl->link_config.advertising, config.advertising);
 637
 638         /* Restrict the phy advertisment according to the MAC support. */
 639         ethtool_convert_link_mode_to_legacy_u32(&advertising, config.advertising);
 640         phy->advertising = advertising;
 641         mutex_unlock(&pl->state_mutex);
 642         mutex_unlock(&phy->lock);
 643
 644         netdev_dbg(pl->netdev,
 645                    "phy: setting supported %*pb advertising 0x%08x\n",
 646                    __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
 647                    phy->advertising);
 648
 649         phy_start_machine(phy);
 650         if (phy->irq > 0)
 651                 phy_start_interrupts(phy);
 652
 653         return 0;
 654 }
 655
 656 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy)
 657 {
 658         int ret;
 659
 660         ret = phy_attach_direct(pl->netdev, phy, 0, pl->link_interface);
 661         if (ret)
 662                 return ret;
 663
 664         ret = phylink_bringup_phy(pl, phy);
 665         if (ret)
 666                 phy_detach(phy);
 667
 668         return ret;
 669 }
 670 EXPORT_SYMBOL_GPL(phylink_connect_phy);
 671
 672 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn)
 673 {
 674         struct device_node *phy_node;
 675         struct phy_device *phy_dev;
 676         int ret;
 677
 678         /* Fixed links are handled without needing a PHY */
 679         if (pl->link_an_mode == MLO_AN_FIXED)
 680                 return 0;
 681
 682         phy_node = of_parse_phandle(dn, "phy-handle", 0);
 683         if (!phy_node)
 684                 phy_node = of_parse_phandle(dn, "phy", 0);
 685         if (!phy_node)
 686                 phy_node = of_parse_phandle(dn, "phy-device", 0);
 687
 688         if (!phy_node) {
 689                 if (pl->link_an_mode == MLO_AN_PHY) {
 690                         netdev_err(pl->netdev, "unable to find PHY node\n");
 691                         return -ENODEV;
 692                 }
 693                 return 0;
 694         }
 695
 696         phy_dev = of_phy_attach(pl->netdev, phy_node, 0, pl->link_interface);
 697         /* We're done with the phy_node handle */
 698         of_node_put(phy_node);
 699
 700         if (!phy_dev)
 701                 return -ENODEV;
 702
 703         ret = phylink_bringup_phy(pl, phy_dev);
 704         if (ret)
 705                 phy_detach(phy_dev);
 706
 707         return ret;
 708 }
 709 EXPORT_SYMBOL_GPL(phylink_of_phy_connect);
 710
 711 void phylink_disconnect_phy(struct phylink *pl)
 712 {
 713         struct phy_device *phy;
 714
 715         WARN_ON(!lockdep_rtnl_is_held());
 716
 717         phy = pl->phydev;
 718         if (phy) {
 719                 mutex_lock(&phy->lock);
 720                 mutex_lock(&pl->state_mutex);
 721                 pl->netdev->phydev = NULL;
 722                 pl->phydev = NULL;
 723                 mutex_unlock(&pl->state_mutex);
 724                 mutex_unlock(&phy->lock);
 725                 flush_work(&pl->resolve);
 726
 727                 phy_disconnect(phy);
 728         }
 729 }
 730 EXPORT_SYMBOL_GPL(phylink_disconnect_phy);
 731
 732 void phylink_mac_change(struct phylink *pl, bool up)
 733 {
 734         if (!up)
 735                 pl->mac_link_dropped = true;
 736         phylink_run_resolve(pl);
 737         netdev_dbg(pl->netdev, "mac link %s\n", up ? "up" : "down");
 738 }
 739 EXPORT_SYMBOL_GPL(phylink_mac_change);
 740
 741 void phylink_start(struct phylink *pl)
 742 {
 743         WARN_ON(!lockdep_rtnl_is_held());
 744
 745         netdev_info(pl->netdev, "configuring for %s/%s link mode\n",
 746                     phylink_an_mode_str(pl->link_an_mode),
 747                     phy_modes(pl->link_config.interface));
 748
 749         /* Apply the link configuration to the MAC when starting. This allows
 750          * a fixed-link to start with the correct parameters, and also
 751          * ensures that we set the appropriate advertisment for Serdes links.
 752          */
 753         phylink_resolve_flow(pl, &pl->link_config);
 754         phylink_mac_config(pl, &pl->link_config);
 755
 756         clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
 757         phylink_run_resolve(pl);
 758
 759         if (pl->sfp_bus)
 760                 sfp_upstream_start(pl->sfp_bus);
 761         if (pl->phydev)
 762                 phy_start(pl->phydev);
 763 }
 764 EXPORT_SYMBOL_GPL(phylink_start);
 765
 766 void phylink_stop(struct phylink *pl)
 767 {
 768         WARN_ON(!lockdep_rtnl_is_held());
 769
 770         if (pl->phydev)
 771                 phy_stop(pl->phydev);
 772         if (pl->sfp_bus)
 773                 sfp_upstream_stop(pl->sfp_bus);
 774
 775         set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
 776         flush_work(&pl->resolve);
 777 }
 778 EXPORT_SYMBOL_GPL(phylink_stop);
 779
 780 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
 781 {
 782         WARN_ON(!lockdep_rtnl_is_held());
 783
 784         wol->supported = 0;
 785         wol->wolopts = 0;
 786
 787         if (pl->phydev)
 788                 phy_ethtool_get_wol(pl->phydev, wol);
 789 }
 790 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol);
 791
 792 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
 793 {
 794         int ret = -EOPNOTSUPP;
 795
 796         WARN_ON(!lockdep_rtnl_is_held());
 797
 798         if (pl->phydev)
 799                 ret = phy_ethtool_set_wol(pl->phydev, wol);
 800
 801         return ret;
 802 }
 803 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol);
 804
 805 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b)
 806 {
 807         __ETHTOOL_DECLARE_LINK_MODE_MASK(mask);
 808
 809         linkmode_zero(mask);
 810         phylink_set_port_modes(mask);
 811
 812         linkmode_and(dst, dst, mask);
 813         linkmode_or(dst, dst, b);
 814 }
 815
 816 static void phylink_get_ksettings(const struct phylink_link_state *state,
 817                                   struct ethtool_link_ksettings *kset)
 818 {
 819         phylink_merge_link_mode(kset->link_modes.advertising, state->advertising);
 820         linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising);
 821         kset->base.speed = state->speed;
 822         kset->base.duplex = state->duplex;
 823         kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE :
 824                                 AUTONEG_DISABLE;
 825 }
 826
 827 int phylink_ethtool_ksettings_get(struct phylink *pl,
 828                                   struct ethtool_link_ksettings *kset)
 829 {
 830         struct phylink_link_state link_state;
 831
 832         WARN_ON(!lockdep_rtnl_is_held());
 833
 834         if (pl->phydev) {
 835                 phy_ethtool_ksettings_get(pl->phydev, kset);
 836         } else {
 837                 kset->base.port = pl->link_port;
 838         }
 839
 840         linkmode_copy(kset->link_modes.supported, pl->supported);
 841
 842         switch (pl->link_an_mode) {
 843         case MLO_AN_FIXED:
 844                 /* We are using fixed settings. Report these as the
 845                  * current link settings - and note that these also
 846                  * represent the supported speeds/duplex/pause modes.
 847                  */
 848                 phylink_get_fixed_state(pl, &link_state);
 849                 phylink_get_ksettings(&link_state, kset);
 850                 break;
 851
 852         case MLO_AN_SGMII:
 853                 /* If there is a phy attached, then use the reported
 854                  * settings from the phy with no modification.
 855                  */
 856                 if (pl->phydev)
 857                         break;
 858
 859         case MLO_AN_8023Z:
 860                 phylink_get_mac_state(pl, &link_state);
 861
 862                 /* The MAC is reporting the link results from its own PCS
 863                  * layer via in-band status. Report these as the current
 864                  * link settings.
 865                  */
 866                 phylink_get_ksettings(&link_state, kset);
 867                 break;
 868         }
 869
 870         return 0;
 871 }
 872 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get);
 873
 874 int phylink_ethtool_ksettings_set(struct phylink *pl,
 875                                   const struct ethtool_link_ksettings *kset)
 876 {
 877         struct ethtool_link_ksettings our_kset;
 878         struct phylink_link_state config;
 879         int ret;
 880
 881         WARN_ON(!lockdep_rtnl_is_held());
 882
 883         if (kset->base.autoneg != AUTONEG_DISABLE &&
 884             kset->base.autoneg != AUTONEG_ENABLE)
 885                 return -EINVAL;
 886
 887         config = pl->link_config;
 888
 889         /* Mask out unsupported advertisments */
 890         linkmode_and(config.advertising, kset->link_modes.advertising,
 891                      pl->supported);
 892
 893         /* FIXME: should we reject autoneg if phy/mac does not support it? */
 894         if (kset->base.autoneg == AUTONEG_DISABLE) {
 895                 const struct phy_setting *s;
 896
 897                 /* Autonegotiation disabled, select a suitable speed and
 898                  * duplex.
 899                  */
 900                 s = phy_lookup_setting(kset->base.speed, kset->base.duplex,
 901                                        pl->supported,
 902                                        __ETHTOOL_LINK_MODE_MASK_NBITS, false);
 903                 if (!s)
 904                         return -EINVAL;
 905
 906                 /* If we have a fixed link (as specified by firmware), refuse
 907                  * to change link parameters.
 908                  */
 909                 if (pl->link_an_mode == MLO_AN_FIXED &&
 910                     (s->speed != pl->link_config.speed ||
 911                      s->duplex != pl->link_config.duplex))
 912                         return -EINVAL;
 913
 914                 config.speed = s->speed;
 915                 config.duplex = s->duplex;
 916                 config.an_enabled = false;
 917
 918                 __clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
 919         } else {
 920                 /* If we have a fixed link, refuse to enable autonegotiation */
 921                 if (pl->link_an_mode == MLO_AN_FIXED)
 922                         return -EINVAL;
 923
 924                 config.speed = SPEED_UNKNOWN;
 925                 config.duplex = DUPLEX_UNKNOWN;
 926                 config.an_enabled = true;
 927
 928                 __set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
 929         }
 930
 931         if (phylink_validate(pl, pl->supported, &config))
 932                 return -EINVAL;
 933
 934         /* If autonegotiation is enabled, we must have an advertisment */
 935         if (config.an_enabled && phylink_is_empty_linkmode(config.advertising))
 936                 return -EINVAL;
 937
 938         our_kset = *kset;
 939         linkmode_copy(our_kset.link_modes.advertising, config.advertising);
 940         our_kset.base.speed = config.speed;
 941         our_kset.base.duplex = config.duplex;
 942
 943         /* If we have a PHY, configure the phy */
 944         if (pl->phydev) {
 945                 ret = phy_ethtool_ksettings_set(pl->phydev, &our_kset);
 946                 if (ret)
 947                         return ret;
 948         }
 949
 950         mutex_lock(&pl->state_mutex);
 951         /* Configure the MAC to match the new settings */
 952         linkmode_copy(pl->link_config.advertising, our_kset.link_modes.advertising);
 953         pl->link_config.speed = our_kset.base.speed;
 954         pl->link_config.duplex = our_kset.base.duplex;
 955         pl->link_config.an_enabled = our_kset.base.autoneg != AUTONEG_DISABLE;
 956
 957         if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) {
 958                 phylink_mac_config(pl, &pl->link_config);
 959                 phylink_mac_an_restart(pl);
 960         }
 961         mutex_unlock(&pl->state_mutex);
 962
 963         return 0;
 964 }
 965 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);
 966
 967 int phylink_ethtool_nway_reset(struct phylink *pl)
 968 {
 969         int ret = 0;
 970
 971         WARN_ON(!lockdep_rtnl_is_held());
 972
 973         if (pl->phydev)
 974                 ret = phy_restart_aneg(pl->phydev);
 975         phylink_mac_an_restart(pl);
 976
 977         return ret;
 978 }
 979 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);
 980
 981 void phylink_ethtool_get_pauseparam(struct phylink *pl,
 982                                     struct ethtool_pauseparam *pause)
 983 {
 984         WARN_ON(!lockdep_rtnl_is_held());
 985
 986         pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN);
 987         pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX);
 988         pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX);
 989 }
 990 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);
 991
 992 int phylink_ethtool_set_pauseparam(struct phylink *pl,
 993                                    struct ethtool_pauseparam *pause)
 994 {
 995         struct phylink_link_state *config = &pl->link_config;
 996
 997         WARN_ON(!lockdep_rtnl_is_held());
 998
 999         if (!phylink_test(pl->supported, Pause) &&
1000             !phylink_test(pl->supported, Asym_Pause))
1001                 return -EOPNOTSUPP;
1002
1003         if (!phylink_test(pl->supported, Asym_Pause) &&
1004             !pause->autoneg && pause->rx_pause != pause->tx_pause)
1005                 return -EINVAL;
1006
1007         config->pause &= ~(MLO_PAUSE_AN | MLO_PAUSE_TXRX_MASK);
1008
1009         if (pause->autoneg)
1010                 config->pause |= MLO_PAUSE_AN;
1011         if (pause->rx_pause)
1012                 config->pause |= MLO_PAUSE_RX;
1013         if (pause->tx_pause)
1014                 config->pause |= MLO_PAUSE_TX;
1015
1016         if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) {
1017                 switch (pl->link_an_mode) {
1018                 case MLO_AN_PHY:
1019                         /* Silently mark the carrier down, and then trigger a resolve */
1020                         netif_carrier_off(pl->netdev);
1021                         phylink_run_resolve(pl);
1022                         break;
1023
1024                 case MLO_AN_FIXED:
1025                         /* Should we allow fixed links to change against the config? */
1026                         phylink_resolve_flow(pl, config);
1027                         phylink_mac_config(pl, config);
1028                         break;
1029
1030                 case MLO_AN_SGMII:
1031                 case MLO_AN_8023Z:
1032                         phylink_mac_config(pl, config);
1033                         phylink_mac_an_restart(pl);
1034                         break;
1035                 }
1036         }
1037
1038         return 0;
1039 }
1040 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
1041
1042 int phylink_ethtool_get_module_info(struct phylink *pl,
1043                                     struct ethtool_modinfo *modinfo)
1044 {
1045         int ret = -EOPNOTSUPP;
1046
1047         WARN_ON(!lockdep_rtnl_is_held());
1048
1049         if (pl->sfp_bus)
1050                 ret = sfp_get_module_info(pl->sfp_bus, modinfo);
1051
1052         return ret;
1053 }
1054 EXPORT_SYMBOL_GPL(phylink_ethtool_get_module_info);
1055
1056 int phylink_ethtool_get_module_eeprom(struct phylink *pl,
1057                                       struct ethtool_eeprom *ee, u8 *buf)
1058 {
1059         int ret = -EOPNOTSUPP;
1060
1061         WARN_ON(!lockdep_rtnl_is_held());
1062
1063         if (pl->sfp_bus)
1064                 ret = sfp_get_module_eeprom(pl->sfp_bus, ee, buf);
1065
1066         return ret;
1067 }
1068 EXPORT_SYMBOL_GPL(phylink_ethtool_get_module_eeprom);
1069
1070 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable)
1071 {
1072         int ret = -EPROTONOSUPPORT;
1073
1074         WARN_ON(!lockdep_rtnl_is_held());
1075
1076         if (pl->phydev)
1077                 ret = phy_init_eee(pl->phydev, clk_stop_enable);
1078
1079         return ret;
1080 }
1081 EXPORT_SYMBOL_GPL(phylink_init_eee);
1082
1083 int phylink_get_eee_err(struct phylink *pl)
1084 {
1085         int ret = 0;
1086
1087         WARN_ON(!lockdep_rtnl_is_held());
1088
1089         if (pl->phydev)
1090                 ret = phy_get_eee_err(pl->phydev);
1091
1092         return ret;
1093 }
1094 EXPORT_SYMBOL_GPL(phylink_get_eee_err);
1095
1096 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee)
1097 {
1098         int ret = -EOPNOTSUPP;
1099
1100         WARN_ON(!lockdep_rtnl_is_held());
1101
1102         if (pl->phydev)
1103                 ret = phy_ethtool_get_eee(pl->phydev, eee);
1104
1105         return ret;
1106 }
1107 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);
1108
1109 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee)
1110 {
1111         int ret = -EOPNOTSUPP;
1112
1113         WARN_ON(!lockdep_rtnl_is_held());
1114
1115         if (pl->phydev)
1116                 ret = phy_ethtool_set_eee(pl->phydev, eee);
1117
1118         return ret;
1119 }
1120 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee);
1121
1122 /* This emulates MII registers for a fixed-mode phy operating as per the
1123  * passed in state. "aneg" defines if we report negotiation is possible.
1124  *
1125  * FIXME: should deal with negotiation state too.
1126  */
1127 static int phylink_mii_emul_read(struct net_device *ndev, unsigned int reg,
1128                                  struct phylink_link_state *state, bool aneg)
1129 {
1130         struct fixed_phy_status fs;
1131         int val;
1132
1133         fs.link = state->link;
1134         fs.speed = state->speed;
1135         fs.duplex = state->duplex;
1136         fs.pause = state->pause & MLO_PAUSE_SYM;
1137         fs.asym_pause = state->pause & MLO_PAUSE_ASYM;
1138
1139         val = swphy_read_reg(reg, &fs);
1140         if (reg == MII_BMSR) {
1141                 if (!state->an_complete)
1142                         val &= ~BMSR_ANEGCOMPLETE;
1143                 if (!aneg)
1144                         val &= ~BMSR_ANEGCAPABLE;
1145         }
1146         return val;
1147 }
1148
1149 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id,
1150                             unsigned int reg)
1151 {
1152         struct phy_device *phydev = pl->phydev;
1153         int prtad, devad;
1154
1155         if (mdio_phy_id_is_c45(phy_id)) {
1156                 prtad = mdio_phy_id_prtad(phy_id);
1157                 devad = mdio_phy_id_devad(phy_id);
1158                 devad = MII_ADDR_C45 | devad << 16 | reg;
1159         } else if (phydev->is_c45) {
1160                 switch (reg) {
1161                 case MII_BMCR:
1162                 case MII_BMSR:
1163                 case MII_PHYSID1:
1164                 case MII_PHYSID2:
1165                         devad = __ffs(phydev->c45_ids.devices_in_package);
1166                         break;
1167                 case MII_ADVERTISE:
1168                 case MII_LPA:
1169                         if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN))
1170                                 return -EINVAL;
1171                         devad = MDIO_MMD_AN;
1172                         if (reg == MII_ADVERTISE)
1173                                 reg = MDIO_AN_ADVERTISE;
1174                         else
1175                                 reg = MDIO_AN_LPA;
1176                         break;
1177                 default:
1178                         return -EINVAL;
1179                 }
1180                 prtad = phy_id;
1181                 devad = MII_ADDR_C45 | devad << 16 | reg;
1182         } else {
1183                 prtad = phy_id;
1184                 devad = reg;
1185         }
1186         return mdiobus_read(pl->phydev->mdio.bus, prtad, devad);
1187 }
1188
1189 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id,
1190                              unsigned int reg, unsigned int val)
1191 {
1192         struct phy_device *phydev = pl->phydev;
1193         int prtad, devad;
1194
1195         if (mdio_phy_id_is_c45(phy_id)) {
1196                 prtad = mdio_phy_id_prtad(phy_id);
1197                 devad = mdio_phy_id_devad(phy_id);
1198                 devad = MII_ADDR_C45 | devad << 16 | reg;
1199         } else if (phydev->is_c45) {
1200                 switch (reg) {
1201                 case MII_BMCR:
1202                 case MII_BMSR:
1203                 case MII_PHYSID1:
1204                 case MII_PHYSID2:
1205                         devad = __ffs(phydev->c45_ids.devices_in_package);
1206                         break;
1207                 case MII_ADVERTISE:
1208                 case MII_LPA:
1209                         if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN))
1210                                 return -EINVAL;
1211                         devad = MDIO_MMD_AN;
1212                         if (reg == MII_ADVERTISE)
1213                                 reg = MDIO_AN_ADVERTISE;
1214                         else
1215                                 reg = MDIO_AN_LPA;
1216                         break;
1217                 default:
1218                         return -EINVAL;
1219                 }
1220                 prtad = phy_id;
1221                 devad = MII_ADDR_C45 | devad << 16 | reg;
1222         } else {
1223                 prtad = phy_id;
1224                 devad = reg;
1225         }
1226
1227         return mdiobus_write(phydev->mdio.bus, prtad, devad, val);
1228 }
1229
1230 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id,
1231                             unsigned int reg)
1232 {
1233         struct phylink_link_state state;
1234         int val = 0xffff;
1235
1236         switch (pl->link_an_mode) {
1237         case MLO_AN_FIXED:
1238                 if (phy_id == 0) {
1239                         phylink_get_fixed_state(pl, &state);
1240                         val = phylink_mii_emul_read(pl->netdev, reg, &state,
1241                                                     true);
1242                 }
1243                 break;
1244
1245         case MLO_AN_PHY:
1246                 return -EOPNOTSUPP;
1247
1248         case MLO_AN_SGMII:
1249                 /* No phy, fall through to 8023z method */
1250         case MLO_AN_8023Z:
1251                 if (phy_id == 0) {
1252                         val = phylink_get_mac_state(pl, &state);
1253                         if (val < 0)
1254                                 return val;
1255
1256                         val = phylink_mii_emul_read(pl->netdev, reg, &state,
1257                                                     true);
1258                 }
1259                 break;
1260         }
1261
1262         return val & 0xffff;
1263 }
1264
1265 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id,
1266                              unsigned int reg, unsigned int val)
1267 {
1268         switch (pl->link_an_mode) {
1269         case MLO_AN_FIXED:
1270                 break;
1271
1272         case MLO_AN_PHY:
1273                 return -EOPNOTSUPP;
1274
1275         case MLO_AN_SGMII:
1276                 /* No phy, fall through to 8023z method */
1277         case MLO_AN_8023Z:
1278                 break;
1279         }
1280
1281         return 0;
1282 }
1283
1284 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
1285 {
1286         struct mii_ioctl_data *mii = if_mii(ifr);
1287         int  ret;
1288
1289         WARN_ON(!lockdep_rtnl_is_held());
1290
1291         if (pl->phydev) {
1292                 /* PHYs only exist for MLO_AN_PHY and MLO_AN_SGMII */
1293                 switch (cmd) {
1294                 case SIOCGMIIPHY:
1295                         mii->phy_id = pl->phydev->mdio.addr;
1296
1297                 case SIOCGMIIREG:
1298                         ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num);
1299                         if (ret >= 0) {
1300                                 mii->val_out = ret;
1301                                 ret = 0;
1302                         }
1303                         break;
1304
1305                 case SIOCSMIIREG:
1306                         ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num,
1307                                                 mii->val_in);
1308                         break;
1309
1310                 default:
1311                         ret = phy_mii_ioctl(pl->phydev, ifr, cmd);
1312                         break;
1313                 }
1314         } else {
1315                 switch (cmd) {
1316                 case SIOCGMIIPHY:
1317                         mii->phy_id = 0;
1318
1319                 case SIOCGMIIREG:
1320                         ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num);
1321                         if (ret >= 0) {
1322                                 mii->val_out = ret;
1323                                 ret = 0;
1324                         }
1325                         break;
1326
1327                 case SIOCSMIIREG:
1328                         ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num,
1329                                                 mii->val_in);
1330                         break;
1331
1332                 default:
1333                         ret = -EOPNOTSUPP;
1334                         break;
1335                 }
1336         }
1337
1338         return ret;
1339 }
1340 EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
1341
1342 static int phylink_sfp_module_insert(void *upstream,
1343                                      const struct sfp_eeprom_id *id)
1344 {
1345         struct phylink *pl = upstream;
1346         __ETHTOOL_DECLARE_LINK_MODE_MASK(support) = { 0, };
1347         struct phylink_link_state config;
1348         phy_interface_t iface;
1349         int mode, ret = 0;
1350         bool changed;
1351         u8 port;
1352
1353         sfp_parse_support(pl->sfp_bus, id, support);
1354         port = sfp_parse_port(pl->sfp_bus, id, support);
1355         iface = sfp_parse_interface(pl->sfp_bus, id);
1356
1357         WARN_ON(!lockdep_rtnl_is_held());
1358
1359         switch (iface) {
1360         case PHY_INTERFACE_MODE_SGMII:
1361                 mode = MLO_AN_SGMII;
1362                 break;
1363         case PHY_INTERFACE_MODE_1000BASEX:
1364                 mode = MLO_AN_8023Z;
1365                 break;
1366         default:
1367                 return -EINVAL;
1368         }
1369
1370         memset(&config, 0, sizeof(config));
1371         linkmode_copy(config.advertising, support);
1372         config.interface = iface;
1373         config.speed = SPEED_UNKNOWN;
1374         config.duplex = DUPLEX_UNKNOWN;
1375         config.pause = MLO_PAUSE_AN;
1376         config.an_enabled = pl->link_config.an_enabled;
1377
1378         /* Ignore errors if we're expecting a PHY to attach later */
1379         ret = phylink_validate(pl, support, &config);
1380         if (ret) {
1381                 netdev_err(pl->netdev, "validation of %s/%s with support %*pb failed: %d\n",
1382                            phylink_an_mode_str(mode), phy_modes(config.interface),
1383                            __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
1384                 return ret;
1385         }
1386
1387         netdev_dbg(pl->netdev, "requesting link mode %s/%s with support %*pb\n",
1388                    phylink_an_mode_str(mode), phy_modes(config.interface),
1389                    __ETHTOOL_LINK_MODE_MASK_NBITS, support);
1390
1391         if (mode == MLO_AN_8023Z && pl->phydev)
1392                 return -EINVAL;
1393
1394         changed = !bitmap_equal(pl->supported, support,
1395                                 __ETHTOOL_LINK_MODE_MASK_NBITS);
1396         if (changed) {
1397                 linkmode_copy(pl->supported, support);
1398                 linkmode_copy(pl->link_config.advertising, config.advertising);
1399         }
1400
1401         if (pl->link_an_mode != mode ||
1402             pl->link_config.interface != config.interface) {
1403                 pl->link_config.interface = config.interface;
1404                 pl->link_an_mode = mode;
1405
1406                 changed = true;
1407
1408                 netdev_info(pl->netdev, "switched to %s/%s link mode\n",
1409                             phylink_an_mode_str(mode),
1410                             phy_modes(config.interface));
1411         }
1412
1413         pl->link_port = port;
1414
1415         if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
1416                                  &pl->phylink_disable_state))
1417                 phylink_mac_config(pl, &pl->link_config);
1418
1419         return ret;
1420 }
1421
1422 static void phylink_sfp_link_down(void *upstream)
1423 {
1424         struct phylink *pl = upstream;
1425
1426         WARN_ON(!lockdep_rtnl_is_held());
1427
1428         set_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
1429         flush_work(&pl->resolve);
1430
1431         netif_carrier_off(pl->netdev);
1432 }
1433
1434 static void phylink_sfp_link_up(void *upstream)
1435 {
1436         struct phylink *pl = upstream;
1437
1438         WARN_ON(!lockdep_rtnl_is_held());
1439
1440         clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
1441         phylink_run_resolve(pl);
1442 }
1443
1444 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
1445 {
1446         return phylink_connect_phy(upstream, phy);
1447 }
1448
1449 static void phylink_sfp_disconnect_phy(void *upstream)
1450 {
1451         phylink_disconnect_phy(upstream);
1452 }
1453
1454 static const struct sfp_upstream_ops sfp_phylink_ops = {
1455         .module_insert = phylink_sfp_module_insert,
1456         .link_up = phylink_sfp_link_up,
1457         .link_down = phylink_sfp_link_down,
1458         .connect_phy = phylink_sfp_connect_phy,
1459         .disconnect_phy = phylink_sfp_disconnect_phy,
1460 };
1461
1462 MODULE_LICENSE("GPL");