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         phylink_set(pl->supported, Pause);
 207         phylink_set(pl->supported, Asym_Pause);
 208         if (s) {
 209                 __set_bit(s->bit, pl->supported);
 210         } else {
 211                 netdev_warn(pl->netdev, "fixed link %s duplex %dMbps not recognised\n",
 212                             pl->link_config.duplex == DUPLEX_FULL ? "full" : "half",
 213                             pl->link_config.speed);
 214         }
 215
 216         linkmode_and(pl->link_config.advertising, pl->link_config.advertising,
 217                      pl->supported);
 218
 219         pl->link_config.link = 1;
 220         pl->link_config.an_complete = 1;
 221
 222         return 0;
 223 }
 224
 225 static int phylink_parse_mode(struct phylink *pl, struct device_node *np)
 226 {
 227         struct device_node *dn;
 228         const char *managed;
 229
 230         dn = of_get_child_by_name(np, "fixed-link");
 231         if (dn || of_find_property(np, "fixed-link", NULL))
 232                 pl->link_an_mode = MLO_AN_FIXED;
 233         of_node_put(dn);
 234
 235         if (of_property_read_string(np, "managed", &managed) == 0 &&
 236             strcmp(managed, "in-band-status") == 0) {
 237                 if (pl->link_an_mode == MLO_AN_FIXED) {
 238                         netdev_err(pl->netdev,
 239                                    "can't use both fixed-link and in-band-status\n");
 240                         return -EINVAL;
 241                 }
 242
 243                 linkmode_zero(pl->supported);
 244                 phylink_set(pl->supported, MII);
 245                 phylink_set(pl->supported, Autoneg);
 246                 phylink_set(pl->supported, Asym_Pause);
 247                 phylink_set(pl->supported, Pause);
 248                 pl->link_config.an_enabled = true;
 249
 250                 switch (pl->link_config.interface) {
 251                 case PHY_INTERFACE_MODE_SGMII:
 252                         phylink_set(pl->supported, 10baseT_Half);
 253                         phylink_set(pl->supported, 10baseT_Full);
 254                         phylink_set(pl->supported, 100baseT_Half);
 255                         phylink_set(pl->supported, 100baseT_Full);
 256                         phylink_set(pl->supported, 1000baseT_Half);
 257                         phylink_set(pl->supported, 1000baseT_Full);
 258                         pl->link_an_mode = MLO_AN_SGMII;
 259                         break;
 260
 261                 case PHY_INTERFACE_MODE_1000BASEX:
 262                         phylink_set(pl->supported, 1000baseX_Full);
 263                         pl->link_an_mode = MLO_AN_8023Z;
 264                         break;
 265
 266                 case PHY_INTERFACE_MODE_2500BASEX:
 267                         phylink_set(pl->supported, 2500baseX_Full);
 268                         pl->link_an_mode = MLO_AN_8023Z;
 269                         break;
 270
 271                 case PHY_INTERFACE_MODE_10GKR:
 272                         phylink_set(pl->supported, 10baseT_Half);
 273                         phylink_set(pl->supported, 10baseT_Full);
 274                         phylink_set(pl->supported, 100baseT_Half);
 275                         phylink_set(pl->supported, 100baseT_Full);
 276                         phylink_set(pl->supported, 1000baseT_Half);
 277                         phylink_set(pl->supported, 1000baseT_Full);
 278                         phylink_set(pl->supported, 1000baseX_Full);
 279                         phylink_set(pl->supported, 10000baseKR_Full);
 280                         phylink_set(pl->supported, 10000baseCR_Full);
 281                         phylink_set(pl->supported, 10000baseSR_Full);
 282                         phylink_set(pl->supported, 10000baseLR_Full);
 283                         phylink_set(pl->supported, 10000baseLRM_Full);
 284                         phylink_set(pl->supported, 10000baseER_Full);
 285                         pl->link_an_mode = MLO_AN_SGMII;
 286                         break;
 287
 288                 default:
 289                         netdev_err(pl->netdev,
 290                                    "incorrect link mode %s for in-band status\n",
 291                                    phy_modes(pl->link_config.interface));
 292                         return -EINVAL;
 293                 }
 294
 295                 linkmode_copy(pl->link_config.advertising, pl->supported);
 296
 297                 if (phylink_validate(pl, pl->supported, &pl->link_config)) {
 298                         netdev_err(pl->netdev,
 299                                    "failed to validate link configuration for in-band status\n");
 300                         return -EINVAL;
 301                 }
 302         }
 303
 304         return 0;
 305 }
 306
 307 static void phylink_mac_config(struct phylink *pl,
 308                                const struct phylink_link_state *state)
 309 {
 310         netdev_dbg(pl->netdev,
 311                    "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
 312                    __func__, phylink_an_mode_str(pl->link_an_mode),
 313                    phy_modes(state->interface),
 314                    phy_speed_to_str(state->speed),
 315                    phy_duplex_to_str(state->duplex),
 316                    __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
 317                    state->pause, state->link, state->an_enabled);
 318
 319         pl->ops->mac_config(pl->netdev, pl->link_an_mode, state);
 320 }
 321
 322 static void phylink_mac_an_restart(struct phylink *pl)
 323 {
 324         if (pl->link_config.an_enabled &&
 325             (pl->link_config.interface == PHY_INTERFACE_MODE_1000BASEX ||
 326              pl->link_config.interface == PHY_INTERFACE_MODE_2500BASEX))
 327                 pl->ops->mac_an_restart(pl->netdev);
 328 }
 329
 330 static int phylink_get_mac_state(struct phylink *pl, struct phylink_link_state *state)
 331 {
 332         struct net_device *ndev = pl->netdev;
 333
 334         linkmode_copy(state->advertising, pl->link_config.advertising);
 335         linkmode_zero(state->lp_advertising);
 336         state->interface = pl->link_config.interface;
 337         state->an_enabled = pl->link_config.an_enabled;
 338         state->speed = SPEED_UNKNOWN;
 339         state->duplex = DUPLEX_UNKNOWN;
 340         state->pause = MLO_PAUSE_NONE;
 341         state->an_complete = 0;
 342         state->link = 1;
 343
 344         return pl->ops->mac_link_state(ndev, state);
 345 }
 346
 347 /* The fixed state is... fixed except for the link state,
 348  * which may be determined by a GPIO.
 349  */
 350 static void phylink_get_fixed_state(struct phylink *pl, struct phylink_link_state *state)
 351 {
 352         *state = pl->link_config;
 353         if (pl->link_gpio)
 354                 state->link = !!gpiod_get_value(pl->link_gpio);
 355 }
 356
 357 /* Flow control is resolved according to our and the link partners
 358  * advertisments using the following drawn from the 802.3 specs:
 359  *  Local device  Link partner
 360  *  Pause AsymDir Pause AsymDir Result
 361  *    1     X       1     X     TX+RX
 362  *    0     1       1     1     TX
 363  *    1     1       0     1     RX
 364  */
 365 static void phylink_resolve_flow(struct phylink *pl,
 366         struct phylink_link_state *state)
 367 {
 368         int new_pause = 0;
 369
 370         if (pl->link_config.pause & MLO_PAUSE_AN) {
 371                 int pause = 0;
 372
 373                 if (phylink_test(pl->link_config.advertising, Pause))
 374                         pause |= MLO_PAUSE_SYM;
 375                 if (phylink_test(pl->link_config.advertising, Asym_Pause))
 376                         pause |= MLO_PAUSE_ASYM;
 377
 378                 pause &= state->pause;
 379
 380                 if (pause & MLO_PAUSE_SYM)
 381                         new_pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
 382                 else if (pause & MLO_PAUSE_ASYM)
 383                         new_pause = state->pause & MLO_PAUSE_SYM ?
 384                                  MLO_PAUSE_TX : MLO_PAUSE_RX;
 385         } else {
 386                 new_pause = pl->link_config.pause & MLO_PAUSE_TXRX_MASK;
 387         }
 388
 389         state->pause &= ~MLO_PAUSE_TXRX_MASK;
 390         state->pause |= new_pause;
 391 }
 392
 393 static const char *phylink_pause_to_str(int pause)
 394 {
 395         switch (pause & MLO_PAUSE_TXRX_MASK) {
 396         case MLO_PAUSE_TX | MLO_PAUSE_RX:
 397                 return "rx/tx";
 398         case MLO_PAUSE_TX:
 399                 return "tx";
 400         case MLO_PAUSE_RX:
 401                 return "rx";
 402         default:
 403                 return "off";
 404         }
 405 }
 406
 407 static void phylink_resolve(struct work_struct *w)
 408 {
 409         struct phylink *pl = container_of(w, struct phylink, resolve);
 410         struct phylink_link_state link_state;
 411         struct net_device *ndev = pl->netdev;
 412
 413         mutex_lock(&pl->state_mutex);
 414         if (pl->phylink_disable_state) {
 415                 pl->mac_link_dropped = false;
 416                 link_state.link = false;
 417         } else if (pl->mac_link_dropped) {
 418                 link_state.link = false;
 419         } else {
 420                 switch (pl->link_an_mode) {
 421                 case MLO_AN_PHY:
 422                         link_state = pl->phy_state;
 423                         phylink_resolve_flow(pl, &link_state);
 424                         phylink_mac_config(pl, &link_state);
 425                         break;
 426
 427                 case MLO_AN_FIXED:
 428                         phylink_get_fixed_state(pl, &link_state);
 429                         phylink_mac_config(pl, &link_state);
 430                         break;
 431
 432                 case MLO_AN_SGMII:
 433                         phylink_get_mac_state(pl, &link_state);
 434                         if (pl->phydev) {
 435                                 bool changed = false;
 436
 437                                 link_state.link = link_state.link &&
 438                                                   pl->phy_state.link;
 439
 440                                 if (pl->phy_state.interface !=
 441                                     link_state.interface) {
 442                                         link_state.interface = pl->phy_state.interface;
 443                                         changed = true;
 444                                 }
 445
 446                                 /* Propagate the flow control from the PHY
 447                                  * to the MAC. Also propagate the interface
 448                                  * if changed.
 449                                  */
 450                                 if (pl->phy_state.link || changed) {
 451                                         link_state.pause |= pl->phy_state.pause;
 452                                         phylink_resolve_flow(pl, &link_state);
 453
 454                                         phylink_mac_config(pl, &link_state);
 455                                 }
 456                         }
 457                         break;
 458
 459                 case MLO_AN_8023Z:
 460                         phylink_get_mac_state(pl, &link_state);
 461                         break;
 462                 }
 463         }
 464
 465         if (link_state.link != netif_carrier_ok(ndev)) {
 466                 if (!link_state.link) {
 467                         netif_carrier_off(ndev);
 468                         pl->ops->mac_link_down(ndev, pl->link_an_mode);
 469                         netdev_info(ndev, "Link is Down\n");
 470                 } else {
 471                         pl->ops->mac_link_up(ndev, pl->link_an_mode,
 472                                              pl->phydev);
 473
 474                         netif_carrier_on(ndev);
 475
 476                         netdev_info(ndev,
 477                                     "Link is Up - %s/%s - flow control %s\n",
 478                                     phy_speed_to_str(link_state.speed),
 479                                     phy_duplex_to_str(link_state.duplex),
 480                                     phylink_pause_to_str(link_state.pause));
 481                 }
 482         }
 483         if (!link_state.link && pl->mac_link_dropped) {
 484                 pl->mac_link_dropped = false;
 485                 queue_work(system_power_efficient_wq, &pl->resolve);
 486         }
 487         mutex_unlock(&pl->state_mutex);
 488 }
 489
 490 static void phylink_run_resolve(struct phylink *pl)
 491 {
 492         if (!pl->phylink_disable_state)
 493                 queue_work(system_power_efficient_wq, &pl->resolve);
 494 }
 495
 496 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit)
 497 {
 498         unsigned long state = pl->phylink_disable_state;
 499
 500         set_bit(bit, &pl->phylink_disable_state);
 501         if (state == 0) {
 502                 queue_work(system_power_efficient_wq, &pl->resolve);
 503                 flush_work(&pl->resolve);
 504         }
 505 }
 506
 507 static const struct sfp_upstream_ops sfp_phylink_ops;
 508
 509 static int phylink_register_sfp(struct phylink *pl, struct device_node *np)
 510 {
 511         struct device_node *sfp_np;
 512
 513         sfp_np = of_parse_phandle(np, "sfp", 0);
 514         if (!sfp_np)
 515                 return 0;
 516
 517         pl->sfp_bus = sfp_register_upstream(sfp_np, pl->netdev, pl,
 518                                             &sfp_phylink_ops);
 519         if (!pl->sfp_bus)
 520                 return -ENOMEM;
 521
 522         return 0;
 523 }
 524
 525 struct phylink *phylink_create(struct net_device *ndev, struct device_node *np,
 526         phy_interface_t iface, const struct phylink_mac_ops *ops)
 527 {
 528         struct phylink *pl;
 529         int ret;
 530
 531         pl = kzalloc(sizeof(*pl), GFP_KERNEL);
 532         if (!pl)
 533                 return ERR_PTR(-ENOMEM);
 534
 535         mutex_init(&pl->state_mutex);
 536         INIT_WORK(&pl->resolve, phylink_resolve);
 537         pl->netdev = ndev;
 538         pl->phy_state.interface = iface;
 539         pl->link_interface = iface;
 540         pl->link_port = PORT_MII;
 541         pl->link_config.interface = iface;
 542         pl->link_config.pause = MLO_PAUSE_AN;
 543         pl->link_config.speed = SPEED_UNKNOWN;
 544         pl->link_config.duplex = DUPLEX_UNKNOWN;
 545         pl->link_config.an_enabled = true;
 546         pl->ops = ops;
 547         __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
 548
 549         bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
 550         linkmode_copy(pl->link_config.advertising, pl->supported);
 551         phylink_validate(pl, pl->supported, &pl->link_config);
 552
 553         ret = phylink_parse_mode(pl, np);
 554         if (ret < 0) {
 555                 kfree(pl);
 556                 return ERR_PTR(ret);
 557         }
 558
 559         if (pl->link_an_mode == MLO_AN_FIXED) {
 560                 ret = phylink_parse_fixedlink(pl, np);
 561                 if (ret < 0) {
 562                         kfree(pl);
 563                         return ERR_PTR(ret);
 564                 }
 565         }
 566
 567         ret = phylink_register_sfp(pl, np);
 568         if (ret < 0) {
 569                 kfree(pl);
 570                 return ERR_PTR(ret);
 571         }
 572
 573         return pl;
 574 }
 575 EXPORT_SYMBOL_GPL(phylink_create);
 576
 577 void phylink_destroy(struct phylink *pl)
 578 {
 579         if (pl->sfp_bus)
 580                 sfp_unregister_upstream(pl->sfp_bus);
 581         if (!IS_ERR_OR_NULL(pl->link_gpio))
 582                 gpiod_put(pl->link_gpio);
 583
 584         cancel_work_sync(&pl->resolve);
 585         kfree(pl);
 586 }
 587 EXPORT_SYMBOL_GPL(phylink_destroy);
 588
 589 void phylink_phy_change(struct phy_device *phydev, bool up, bool do_carrier)
 590 {
 591         struct phylink *pl = phydev->phylink;
 592
 593         mutex_lock(&pl->state_mutex);
 594         pl->phy_state.speed = phydev->speed;
 595         pl->phy_state.duplex = phydev->duplex;
 596         pl->phy_state.pause = MLO_PAUSE_NONE;
 597         if (phydev->pause)
 598                 pl->phy_state.pause |= MLO_PAUSE_SYM;
 599         if (phydev->asym_pause)
 600                 pl->phy_state.pause |= MLO_PAUSE_ASYM;
 601         pl->phy_state.interface = phydev->interface;
 602         pl->phy_state.link = up;
 603         mutex_unlock(&pl->state_mutex);
 604
 605         phylink_run_resolve(pl);
 606
 607         netdev_dbg(pl->netdev, "phy link %s %s/%s/%s\n", up ? "up" : "down",
 608                    phy_modes(phydev->interface),
 609                    phy_speed_to_str(phydev->speed),
 610                    phy_duplex_to_str(phydev->duplex));
 611 }
 612
 613 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy)
 614 {
 615         struct phylink_link_state config;
 616         __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
 617         u32 advertising;
 618         int ret;
 619
 620         memset(&config, 0, sizeof(config));
 621         ethtool_convert_legacy_u32_to_link_mode(supported, phy->supported);
 622         ethtool_convert_legacy_u32_to_link_mode(config.advertising,
 623                                                 phy->advertising);
 624         config.interface = pl->link_config.interface;
 625
 626         /*
 627          * This is the new way of dealing with flow control for PHYs,
 628          * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
 629          * phy drivers should not set SUPPORTED_[Asym_]Pause") except
 630          * using our validate call to the MAC, we rely upon the MAC
 631          * clearing the bits from both supported and advertising fields.
 632          */
 633         if (phylink_test(supported, Pause))
 634                 phylink_set(config.advertising, Pause);
 635         if (phylink_test(supported, Asym_Pause))
 636                 phylink_set(config.advertising, Asym_Pause);
 637
 638         ret = phylink_validate(pl, supported, &config);
 639         if (ret)
 640                 return ret;
 641
 642         phy->phylink = pl;
 643         phy->phy_link_change = phylink_phy_change;
 644
 645         netdev_info(pl->netdev,
 646                     "PHY [%s] driver [%s]\n", dev_name(&phy->mdio.dev),
 647                     phy->drv->name);
 648
 649         mutex_lock(&phy->lock);
 650         mutex_lock(&pl->state_mutex);
 651         pl->netdev->phydev = phy;
 652         pl->phydev = phy;
 653         linkmode_copy(pl->supported, supported);
 654         linkmode_copy(pl->link_config.advertising, config.advertising);
 655
 656         /* Restrict the phy advertisment according to the MAC support. */
 657         ethtool_convert_link_mode_to_legacy_u32(&advertising, config.advertising);
 658         phy->advertising = advertising;
 659         mutex_unlock(&pl->state_mutex);
 660         mutex_unlock(&phy->lock);
 661
 662         netdev_dbg(pl->netdev,
 663                    "phy: setting supported %*pb advertising 0x%08x\n",
 664                    __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
 665                    phy->advertising);
 666
 667         phy_start_machine(phy);
 668         if (phy->irq > 0)
 669                 phy_start_interrupts(phy);
 670
 671         return 0;
 672 }
 673
 674 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy)
 675 {
 676         int ret;
 677
 678         ret = phy_attach_direct(pl->netdev, phy, 0, pl->link_interface);
 679         if (ret)
 680                 return ret;
 681
 682         ret = phylink_bringup_phy(pl, phy);
 683         if (ret)
 684                 phy_detach(phy);
 685
 686         return ret;
 687 }
 688 EXPORT_SYMBOL_GPL(phylink_connect_phy);
 689
 690 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn)
 691 {
 692         struct device_node *phy_node;
 693         struct phy_device *phy_dev;
 694         int ret;
 695
 696         /* Fixed links are handled without needing a PHY */
 697         if (pl->link_an_mode == MLO_AN_FIXED)
 698                 return 0;
 699
 700         phy_node = of_parse_phandle(dn, "phy-handle", 0);
 701         if (!phy_node)
 702                 phy_node = of_parse_phandle(dn, "phy", 0);
 703         if (!phy_node)
 704                 phy_node = of_parse_phandle(dn, "phy-device", 0);
 705
 706         if (!phy_node) {
 707                 if (pl->link_an_mode == MLO_AN_PHY) {
 708                         netdev_err(pl->netdev, "unable to find PHY node\n");
 709                         return -ENODEV;
 710                 }
 711                 return 0;
 712         }
 713
 714         phy_dev = of_phy_attach(pl->netdev, phy_node, 0, pl->link_interface);
 715         /* We're done with the phy_node handle */
 716         of_node_put(phy_node);
 717
 718         if (!phy_dev)
 719                 return -ENODEV;
 720
 721         ret = phylink_bringup_phy(pl, phy_dev);
 722         if (ret)
 723                 phy_detach(phy_dev);
 724
 725         return ret;
 726 }
 727 EXPORT_SYMBOL_GPL(phylink_of_phy_connect);
 728
 729 void phylink_disconnect_phy(struct phylink *pl)
 730 {
 731         struct phy_device *phy;
 732
 733         WARN_ON(!lockdep_rtnl_is_held());
 734
 735         phy = pl->phydev;
 736         if (phy) {
 737                 mutex_lock(&phy->lock);
 738                 mutex_lock(&pl->state_mutex);
 739                 pl->netdev->phydev = NULL;
 740                 pl->phydev = NULL;
 741                 mutex_unlock(&pl->state_mutex);
 742                 mutex_unlock(&phy->lock);
 743                 flush_work(&pl->resolve);
 744
 745                 phy_disconnect(phy);
 746         }
 747 }
 748 EXPORT_SYMBOL_GPL(phylink_disconnect_phy);
 749
 750 void phylink_mac_change(struct phylink *pl, bool up)
 751 {
 752         if (!up)
 753                 pl->mac_link_dropped = true;
 754         phylink_run_resolve(pl);
 755         netdev_dbg(pl->netdev, "mac link %s\n", up ? "up" : "down");
 756 }
 757 EXPORT_SYMBOL_GPL(phylink_mac_change);
 758
 759 void phylink_start(struct phylink *pl)
 760 {
 761         WARN_ON(!lockdep_rtnl_is_held());
 762
 763         netdev_info(pl->netdev, "configuring for %s/%s link mode\n",
 764                     phylink_an_mode_str(pl->link_an_mode),
 765                     phy_modes(pl->link_config.interface));
 766
 767         /* Always set the carrier off */
 768         netif_carrier_off(pl->netdev);
 769
 770         /* Apply the link configuration to the MAC when starting. This allows
 771          * a fixed-link to start with the correct parameters, and also
 772          * ensures that we set the appropriate advertisment for Serdes links.
 773          */
 774         phylink_resolve_flow(pl, &pl->link_config);
 775         phylink_mac_config(pl, &pl->link_config);
 776
 777         clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
 778         phylink_run_resolve(pl);
 779
 780         if (pl->sfp_bus)
 781                 sfp_upstream_start(pl->sfp_bus);
 782         if (pl->phydev)
 783                 phy_start(pl->phydev);
 784 }
 785 EXPORT_SYMBOL_GPL(phylink_start);
 786
 787 void phylink_stop(struct phylink *pl)
 788 {
 789         WARN_ON(!lockdep_rtnl_is_held());
 790
 791         if (pl->phydev)
 792                 phy_stop(pl->phydev);
 793         if (pl->sfp_bus)
 794                 sfp_upstream_stop(pl->sfp_bus);
 795
 796         phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);
 797 }
 798 EXPORT_SYMBOL_GPL(phylink_stop);
 799
 800 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
 801 {
 802         WARN_ON(!lockdep_rtnl_is_held());
 803
 804         wol->supported = 0;
 805         wol->wolopts = 0;
 806
 807         if (pl->phydev)
 808                 phy_ethtool_get_wol(pl->phydev, wol);
 809 }
 810 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol);
 811
 812 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
 813 {
 814         int ret = -EOPNOTSUPP;
 815
 816         WARN_ON(!lockdep_rtnl_is_held());
 817
 818         if (pl->phydev)
 819                 ret = phy_ethtool_set_wol(pl->phydev, wol);
 820
 821         return ret;
 822 }
 823 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol);
 824
 825 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b)
 826 {
 827         __ETHTOOL_DECLARE_LINK_MODE_MASK(mask);
 828
 829         linkmode_zero(mask);
 830         phylink_set_port_modes(mask);
 831
 832         linkmode_and(dst, dst, mask);
 833         linkmode_or(dst, dst, b);
 834 }
 835
 836 static void phylink_get_ksettings(const struct phylink_link_state *state,
 837                                   struct ethtool_link_ksettings *kset)
 838 {
 839         phylink_merge_link_mode(kset->link_modes.advertising, state->advertising);
 840         linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising);
 841         kset->base.speed = state->speed;
 842         kset->base.duplex = state->duplex;
 843         kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE :
 844                                 AUTONEG_DISABLE;
 845 }
 846
 847 int phylink_ethtool_ksettings_get(struct phylink *pl,
 848         struct ethtool_link_ksettings *kset)
 849 {
 850         struct phylink_link_state link_state;
 851
 852         WARN_ON(!lockdep_rtnl_is_held());
 853
 854         if (pl->phydev) {
 855                 phy_ethtool_ksettings_get(pl->phydev, kset);
 856         } else {
 857                 kset->base.port = pl->link_port;
 858         }
 859
 860         linkmode_copy(kset->link_modes.supported, pl->supported);
 861
 862         switch (pl->link_an_mode) {
 863         case MLO_AN_FIXED:
 864                 /* We are using fixed settings. Report these as the
 865                  * current link settings - and note that these also
 866                  * represent the supported speeds/duplex/pause modes.
 867                  */
 868                 phylink_get_fixed_state(pl, &link_state);
 869                 phylink_get_ksettings(&link_state, kset);
 870                 break;
 871
 872         case MLO_AN_SGMII:
 873                 /* If there is a phy attached, then use the reported
 874                  * settings from the phy with no modification.
 875                  */
 876                 if (pl->phydev)
 877                         break;
 878
 879         case MLO_AN_8023Z:
 880                 phylink_get_mac_state(pl, &link_state);
 881
 882                 /* The MAC is reporting the link results from its own PCS
 883                  * layer via in-band status. Report these as the current
 884                  * link settings.
 885                  */
 886                 phylink_get_ksettings(&link_state, kset);
 887                 break;
 888         }
 889
 890         return 0;
 891 }
 892 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get);
 893
 894 int phylink_ethtool_ksettings_set(struct phylink *pl,
 895         const struct ethtool_link_ksettings *kset)
 896 {
 897         struct ethtool_link_ksettings our_kset;
 898         struct phylink_link_state config;
 899         int ret;
 900
 901         WARN_ON(!lockdep_rtnl_is_held());
 902
 903         if (kset->base.autoneg != AUTONEG_DISABLE &&
 904             kset->base.autoneg != AUTONEG_ENABLE)
 905                 return -EINVAL;
 906
 907         config = pl->link_config;
 908
 909         /* Mask out unsupported advertisments */
 910         linkmode_and(config.advertising, kset->link_modes.advertising,
 911                      pl->supported);
 912
 913         /* FIXME: should we reject autoneg if phy/mac does not support it? */
 914         if (kset->base.autoneg == AUTONEG_DISABLE) {
 915                 const struct phy_setting *s;
 916
 917                 /* Autonegotiation disabled, select a suitable speed and
 918                  * duplex.
 919                  */
 920                 s = phy_lookup_setting(kset->base.speed, kset->base.duplex,
 921                                        pl->supported,
 922                                        __ETHTOOL_LINK_MODE_MASK_NBITS, false);
 923                 if (!s)
 924                         return -EINVAL;
 925
 926                 /* If we have a fixed link (as specified by firmware), refuse
 927                  * to change link parameters.
 928                  */
 929                 if (pl->link_an_mode == MLO_AN_FIXED &&
 930                     (s->speed != pl->link_config.speed ||
 931                      s->duplex != pl->link_config.duplex))
 932                         return -EINVAL;
 933
 934                 config.speed = s->speed;
 935                 config.duplex = s->duplex;
 936                 config.an_enabled = false;
 937
 938                 __clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
 939         } else {
 940                 /* If we have a fixed link, refuse to enable autonegotiation */
 941                 if (pl->link_an_mode == MLO_AN_FIXED)
 942                         return -EINVAL;
 943
 944                 config.speed = SPEED_UNKNOWN;
 945                 config.duplex = DUPLEX_UNKNOWN;
 946                 config.an_enabled = true;
 947
 948                 __set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
 949         }
 950
 951         if (phylink_validate(pl, pl->supported, &config))
 952                 return -EINVAL;
 953
 954         /* If autonegotiation is enabled, we must have an advertisment */
 955         if (config.an_enabled && phylink_is_empty_linkmode(config.advertising))
 956                 return -EINVAL;
 957
 958         our_kset = *kset;
 959         linkmode_copy(our_kset.link_modes.advertising, config.advertising);
 960         our_kset.base.speed = config.speed;
 961         our_kset.base.duplex = config.duplex;
 962
 963         /* If we have a PHY, configure the phy */
 964         if (pl->phydev) {
 965                 ret = phy_ethtool_ksettings_set(pl->phydev, &our_kset);
 966                 if (ret)
 967                         return ret;
 968         }
 969
 970         mutex_lock(&pl->state_mutex);
 971         /* Configure the MAC to match the new settings */
 972         linkmode_copy(pl->link_config.advertising, our_kset.link_modes.advertising);
 973         pl->link_config.interface = config.interface;
 974         pl->link_config.speed = our_kset.base.speed;
 975         pl->link_config.duplex = our_kset.base.duplex;
 976         pl->link_config.an_enabled = our_kset.base.autoneg != AUTONEG_DISABLE;
 977
 978         if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) {
 979                 phylink_mac_config(pl, &pl->link_config);
 980                 phylink_mac_an_restart(pl);
 981         }
 982         mutex_unlock(&pl->state_mutex);
 983
 984         return 0;
 985 }
 986 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);
 987
 988 int phylink_ethtool_nway_reset(struct phylink *pl)
 989 {
 990         int ret = 0;
 991
 992         WARN_ON(!lockdep_rtnl_is_held());
 993
 994         if (pl->phydev)
 995                 ret = phy_restart_aneg(pl->phydev);
 996         phylink_mac_an_restart(pl);
 997
 998         return ret;
 999 }
1000 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);
1001
1002 void phylink_ethtool_get_pauseparam(struct phylink *pl,
1003                                     struct ethtool_pauseparam *pause)
1004 {
1005         WARN_ON(!lockdep_rtnl_is_held());
1006
1007         pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN);
1008         pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX);
1009         pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX);
1010 }
1011 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);
1012
1013 int phylink_ethtool_set_pauseparam(struct phylink *pl,
1014                                    struct ethtool_pauseparam *pause)
1015 {
1016         struct phylink_link_state *config = &pl->link_config;
1017
1018         WARN_ON(!lockdep_rtnl_is_held());
1019
1020         if (!phylink_test(pl->supported, Pause) &&
1021             !phylink_test(pl->supported, Asym_Pause))
1022                 return -EOPNOTSUPP;
1023
1024         if (!phylink_test(pl->supported, Asym_Pause) &&
1025             pause->rx_pause != pause->tx_pause)
1026                 return -EINVAL;
1027
1028         config->pause &= ~(MLO_PAUSE_AN | MLO_PAUSE_TXRX_MASK);
1029
1030         if (pause->autoneg)
1031                 config->pause |= MLO_PAUSE_AN;
1032         if (pause->rx_pause)
1033                 config->pause |= MLO_PAUSE_RX;
1034         if (pause->tx_pause)
1035                 config->pause |= MLO_PAUSE_TX;
1036
1037         if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) {
1038                 switch (pl->link_an_mode) {
1039                 case MLO_AN_PHY:
1040                         /* Silently mark the carrier down, and then trigger a resolve */
1041                         netif_carrier_off(pl->netdev);
1042                         phylink_run_resolve(pl);
1043                         break;
1044
1045                 case MLO_AN_FIXED:
1046                         /* Should we allow fixed links to change against the config? */
1047                         phylink_resolve_flow(pl, config);
1048                         phylink_mac_config(pl, config);
1049                         break;
1050
1051                 case MLO_AN_SGMII:
1052                 case MLO_AN_8023Z:
1053                         phylink_mac_config(pl, config);
1054                         phylink_mac_an_restart(pl);
1055                         break;
1056                 }
1057         }
1058
1059         return 0;
1060 }
1061 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
1062
1063 int phylink_ethtool_get_module_info(struct phylink *pl,
1064                                     struct ethtool_modinfo *modinfo)
1065 {
1066         int ret = -EOPNOTSUPP;
1067
1068         WARN_ON(!lockdep_rtnl_is_held());
1069
1070         if (pl->sfp_bus)
1071                 ret = sfp_get_module_info(pl->sfp_bus, modinfo);
1072
1073         return ret;
1074 }
1075 EXPORT_SYMBOL_GPL(phylink_ethtool_get_module_info);
1076
1077 int phylink_ethtool_get_module_eeprom(struct phylink *pl,
1078                                       struct ethtool_eeprom *ee, u8 *buf)
1079 {
1080         int ret = -EOPNOTSUPP;
1081
1082         WARN_ON(!lockdep_rtnl_is_held());
1083
1084         if (pl->sfp_bus)
1085                 ret = sfp_get_module_eeprom(pl->sfp_bus, ee, buf);
1086
1087         return ret;
1088 }
1089 EXPORT_SYMBOL_GPL(phylink_ethtool_get_module_eeprom);
1090
1091 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable)
1092 {
1093         int ret = -EPROTONOSUPPORT;
1094
1095         WARN_ON(!lockdep_rtnl_is_held());
1096
1097         if (pl->phydev)
1098                 ret = phy_init_eee(pl->phydev, clk_stop_enable);
1099
1100         return ret;
1101 }
1102 EXPORT_SYMBOL_GPL(phylink_init_eee);
1103
1104 int phylink_get_eee_err(struct phylink *pl)
1105 {
1106         int ret = 0;
1107
1108         WARN_ON(!lockdep_rtnl_is_held());
1109
1110         if (pl->phydev)
1111                 ret = phy_get_eee_err(pl->phydev);
1112
1113         return ret;
1114 }
1115 EXPORT_SYMBOL_GPL(phylink_get_eee_err);
1116
1117 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee)
1118 {
1119         int ret = -EOPNOTSUPP;
1120
1121         WARN_ON(!lockdep_rtnl_is_held());
1122
1123         if (pl->phydev)
1124                 ret = phy_ethtool_get_eee(pl->phydev, eee);
1125
1126         return ret;
1127 }
1128 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);
1129
1130 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee)
1131 {
1132         int ret = -EOPNOTSUPP;
1133
1134         WARN_ON(!lockdep_rtnl_is_held());
1135
1136         if (pl->phydev)
1137                 ret = phy_ethtool_set_eee(pl->phydev, eee);
1138
1139         return ret;
1140 }
1141 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee);
1142
1143 /* This emulates MII registers for a fixed-mode phy operating as per the
1144  * passed in state. "aneg" defines if we report negotiation is possible.
1145  *
1146  * FIXME: should deal with negotiation state too.
1147  */
1148 static int phylink_mii_emul_read(struct net_device *ndev, unsigned int reg,
1149                                  struct phylink_link_state *state, bool aneg)
1150 {
1151         struct fixed_phy_status fs;
1152         int val;
1153
1154         fs.link = state->link;
1155         fs.speed = state->speed;
1156         fs.duplex = state->duplex;
1157         fs.pause = state->pause & MLO_PAUSE_SYM;
1158         fs.asym_pause = state->pause & MLO_PAUSE_ASYM;
1159
1160         val = swphy_read_reg(reg, &fs);
1161         if (reg == MII_BMSR) {
1162                 if (!state->an_complete)
1163                         val &= ~BMSR_ANEGCOMPLETE;
1164                 if (!aneg)
1165                         val &= ~BMSR_ANEGCAPABLE;
1166         }
1167         return val;
1168 }
1169
1170 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id,
1171                             unsigned int reg)
1172 {
1173         struct phy_device *phydev = pl->phydev;
1174         int prtad, devad;
1175
1176         if (mdio_phy_id_is_c45(phy_id)) {
1177                 prtad = mdio_phy_id_prtad(phy_id);
1178                 devad = mdio_phy_id_devad(phy_id);
1179                 devad = MII_ADDR_C45 | devad << 16 | reg;
1180         } else if (phydev->is_c45) {
1181                 switch (reg) {
1182                 case MII_BMCR:
1183                 case MII_BMSR:
1184                 case MII_PHYSID1:
1185                 case MII_PHYSID2:
1186                         devad = __ffs(phydev->c45_ids.devices_in_package);
1187                         break;
1188                 case MII_ADVERTISE:
1189                 case MII_LPA:
1190                         if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN))
1191                                 return -EINVAL;
1192                         devad = MDIO_MMD_AN;
1193                         if (reg == MII_ADVERTISE)
1194                                 reg = MDIO_AN_ADVERTISE;
1195                         else
1196                                 reg = MDIO_AN_LPA;
1197                         break;
1198                 default:
1199                         return -EINVAL;
1200                 }
1201                 prtad = phy_id;
1202                 devad = MII_ADDR_C45 | devad << 16 | reg;
1203         } else {
1204                 prtad = phy_id;
1205                 devad = reg;
1206         }
1207         return mdiobus_read(pl->phydev->mdio.bus, prtad, devad);
1208 }
1209
1210 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id,
1211                              unsigned int reg, unsigned int val)
1212 {
1213         struct phy_device *phydev = pl->phydev;
1214         int prtad, devad;
1215
1216         if (mdio_phy_id_is_c45(phy_id)) {
1217                 prtad = mdio_phy_id_prtad(phy_id);
1218                 devad = mdio_phy_id_devad(phy_id);
1219                 devad = MII_ADDR_C45 | devad << 16 | reg;
1220         } else if (phydev->is_c45) {
1221                 switch (reg) {
1222                 case MII_BMCR:
1223                 case MII_BMSR:
1224                 case MII_PHYSID1:
1225                 case MII_PHYSID2:
1226                         devad = __ffs(phydev->c45_ids.devices_in_package);
1227                         break;
1228                 case MII_ADVERTISE:
1229                 case MII_LPA:
1230                         if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN))
1231                                 return -EINVAL;
1232                         devad = MDIO_MMD_AN;
1233                         if (reg == MII_ADVERTISE)
1234                                 reg = MDIO_AN_ADVERTISE;
1235                         else
1236                                 reg = MDIO_AN_LPA;
1237                         break;
1238                 default:
1239                         return -EINVAL;
1240                 }
1241                 prtad = phy_id;
1242                 devad = MII_ADDR_C45 | devad << 16 | reg;
1243         } else {
1244                 prtad = phy_id;
1245                 devad = reg;
1246         }
1247
1248         return mdiobus_write(phydev->mdio.bus, prtad, devad, val);
1249 }
1250
1251 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id,
1252                             unsigned int reg)
1253 {
1254         struct phylink_link_state state;
1255         int val = 0xffff;
1256
1257         switch (pl->link_an_mode) {
1258         case MLO_AN_FIXED:
1259                 if (phy_id == 0) {
1260                         phylink_get_fixed_state(pl, &state);
1261                         val = phylink_mii_emul_read(pl->netdev, reg, &state,
1262                                                     true);
1263                 }
1264                 break;
1265
1266         case MLO_AN_PHY:
1267                 return -EOPNOTSUPP;
1268
1269         case MLO_AN_SGMII:
1270                 /* No phy, fall through to 8023z method */
1271         case MLO_AN_8023Z:
1272                 if (phy_id == 0) {
1273                         val = phylink_get_mac_state(pl, &state);
1274                         if (val < 0)
1275                                 return val;
1276
1277                         val = phylink_mii_emul_read(pl->netdev, reg, &state,
1278                                                     true);
1279                 }
1280                 break;
1281         }
1282
1283         return val & 0xffff;
1284 }
1285
1286 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id,
1287                              unsigned int reg, unsigned int val)
1288 {
1289         switch (pl->link_an_mode) {
1290         case MLO_AN_FIXED:
1291                 break;
1292
1293         case MLO_AN_PHY:
1294                 return -EOPNOTSUPP;
1295
1296         case MLO_AN_SGMII:
1297                 /* No phy, fall through to 8023z method */
1298         case MLO_AN_8023Z:
1299                 break;
1300         }
1301
1302         return 0;
1303 }
1304
1305 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
1306 {
1307         struct mii_ioctl_data *mii = if_mii(ifr);
1308         int  ret;
1309
1310         WARN_ON(!lockdep_rtnl_is_held());
1311
1312         if (pl->phydev) {
1313                 /* PHYs only exist for MLO_AN_PHY and MLO_AN_SGMII */
1314                 switch (cmd) {
1315                 case SIOCGMIIPHY:
1316                         mii->phy_id = pl->phydev->mdio.addr;
1317
1318                 case SIOCGMIIREG:
1319                         ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num);
1320                         if (ret >= 0) {
1321                                 mii->val_out = ret;
1322                                 ret = 0;
1323                         }
1324                         break;
1325
1326                 case SIOCSMIIREG:
1327                         ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num,
1328                                                 mii->val_in);
1329                         break;
1330
1331                 default:
1332                         ret = phy_mii_ioctl(pl->phydev, ifr, cmd);
1333                         break;
1334                 }
1335         } else {
1336                 switch (cmd) {
1337                 case SIOCGMIIPHY:
1338                         mii->phy_id = 0;
1339
1340                 case SIOCGMIIREG:
1341                         ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num);
1342                         if (ret >= 0) {
1343                                 mii->val_out = ret;
1344                                 ret = 0;
1345                         }
1346                         break;
1347
1348                 case SIOCSMIIREG:
1349                         ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num,
1350                                                 mii->val_in);
1351                         break;
1352
1353                 default:
1354                         ret = -EOPNOTSUPP;
1355                         break;
1356                 }
1357         }
1358
1359         return ret;
1360 }
1361 EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
1362
1363
1364
1365 static int phylink_sfp_module_insert(void *upstream,
1366                                      const struct sfp_eeprom_id *id)
1367 {
1368         struct phylink *pl = upstream;
1369         __ETHTOOL_DECLARE_LINK_MODE_MASK(support) = { 0, };
1370         struct phylink_link_state config;
1371         phy_interface_t iface;
1372         int mode, ret = 0;
1373         bool changed;
1374         u8 port;
1375
1376         sfp_parse_support(pl->sfp_bus, id, support);
1377         port = sfp_parse_port(pl->sfp_bus, id, support);
1378         iface = sfp_parse_interface(pl->sfp_bus, id);
1379
1380         WARN_ON(!lockdep_rtnl_is_held());
1381
1382         switch (iface) {
1383         case PHY_INTERFACE_MODE_SGMII:
1384                 mode = MLO_AN_SGMII;
1385                 break;
1386         case PHY_INTERFACE_MODE_1000BASEX:
1387                 mode = MLO_AN_8023Z;
1388                 break;
1389         default:
1390                 return -EINVAL;
1391         }
1392
1393         memset(&config, 0, sizeof(config));
1394         linkmode_copy(config.advertising, support);
1395         config.interface = iface;
1396         config.speed = SPEED_UNKNOWN;
1397         config.duplex = DUPLEX_UNKNOWN;
1398         config.pause = MLO_PAUSE_AN;
1399         config.an_enabled = pl->link_config.an_enabled;
1400
1401         /* Ignore errors if we're expecting a PHY to attach later */
1402         ret = phylink_validate(pl, support, &config);
1403         if (ret) {
1404                 netdev_err(pl->netdev, "validation of %s/%s with support %*pb failed: %d\n",
1405                            phylink_an_mode_str(mode), phy_modes(config.interface),
1406                            __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
1407                 return ret;
1408         }
1409
1410         netdev_dbg(pl->netdev, "requesting link mode %s/%s with support %*pb\n",
1411                    phylink_an_mode_str(mode), phy_modes(config.interface),
1412                    __ETHTOOL_LINK_MODE_MASK_NBITS, support);
1413
1414         if (mode == MLO_AN_8023Z && pl->phydev)
1415                 return -EINVAL;
1416
1417         changed = !bitmap_equal(pl->supported, support,
1418                                 __ETHTOOL_LINK_MODE_MASK_NBITS);
1419         if (changed) {
1420                 linkmode_copy(pl->supported, support);
1421                 linkmode_copy(pl->link_config.advertising, config.advertising);
1422         }
1423
1424         if (pl->link_an_mode != mode ||
1425             pl->link_config.interface != config.interface) {
1426                 pl->link_config.interface = config.interface;
1427                 pl->link_an_mode = mode;
1428
1429                 changed = true;
1430
1431                 netdev_info(pl->netdev, "switched to %s/%s link mode\n",
1432                             phylink_an_mode_str(mode),
1433                             phy_modes(config.interface));
1434         }
1435
1436         pl->link_port = port;
1437
1438         if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
1439                                  &pl->phylink_disable_state))
1440                 phylink_mac_config(pl, &pl->link_config);
1441
1442         return ret;
1443 }
1444
1445 static void phylink_sfp_link_down(void *upstream)
1446 {
1447         struct phylink *pl = upstream;
1448
1449         WARN_ON(!lockdep_rtnl_is_held());
1450
1451         phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK);
1452 }
1453
1454 static void phylink_sfp_link_up(void *upstream)
1455 {
1456         struct phylink *pl = upstream;
1457
1458         WARN_ON(!lockdep_rtnl_is_held());
1459
1460         clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
1461         phylink_run_resolve(pl);
1462 }
1463
1464 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
1465 {
1466         return phylink_connect_phy(upstream, phy);
1467 }
1468
1469 static void phylink_sfp_disconnect_phy(void *upstream)
1470 {
1471         phylink_disconnect_phy(upstream);
1472 }
1473
1474 static const struct sfp_upstream_ops sfp_phylink_ops = {
1475         .module_insert = phylink_sfp_module_insert,
1476         .link_up = phylink_sfp_link_up,
1477         .link_down = phylink_sfp_link_down,
1478         .connect_phy = phylink_sfp_connect_phy,
1479         .disconnect_phy = phylink_sfp_disconnect_phy,
1480 };
1481
1482 MODULE_LICENSE("GPL");