root/drivers/net/ethernet/sfc/mcdi_port.c

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DEFINITIONS

This source file includes following definitions.
  1. efx_mcdi_get_phy_cfg
  2. efx_mcdi_set_link
  3. efx_mcdi_loopback_modes
  4. efx_mcdi_mdio_read
  5. efx_mcdi_mdio_write
  6. mcdi_to_ethtool_linkset
  7. ethtool_linkset_to_mcdi_cap
  8. efx_get_mcdi_phy_flags
  9. mcdi_to_ethtool_media
  10. efx_mcdi_phy_decode_link
  11. ethtool_fec_caps_to_mcdi
  12. mcdi_fec_caps_to_ethtool
  13. efx_mcdi_phy_probe
  14. efx_mcdi_port_reconfigure
  15. efx_mcdi_phy_check_fcntl
  16. efx_mcdi_phy_poll
  17. efx_mcdi_phy_remove
  18. efx_mcdi_phy_get_link_ksettings
  19. efx_mcdi_phy_set_link_ksettings
  20. efx_mcdi_phy_get_fecparam
  21. efx_mcdi_phy_set_fecparam
  22. efx_mcdi_phy_test_alive
  23. efx_mcdi_bist
  24. efx_mcdi_phy_run_tests
  25. efx_mcdi_phy_test_name
  26. efx_mcdi_phy_get_module_eeprom_page
  27. efx_mcdi_phy_get_module_eeprom_byte
  28. efx_mcdi_phy_diag_type
  29. efx_mcdi_phy_sff_8472_level
  30. efx_mcdi_phy_module_type
  31. efx_mcdi_phy_get_module_eeprom
  32. efx_mcdi_phy_get_module_info
  33. efx_mcdi_phy_get_caps
  34. efx_mcdi_process_link_change
  35. efx_mcdi_set_mac
  36. efx_mcdi_mac_check_fault
  37. efx_mcdi_mac_stats
  38. efx_mcdi_mac_start_stats
  39. efx_mcdi_mac_stop_stats
  40. efx_mcdi_mac_pull_stats
  41. efx_mcdi_port_probe
  42. efx_mcdi_port_remove
  43. efx_mcdi_port_get_number

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /****************************************************************************
   3  * Driver for Solarflare network controllers and boards
   4  * Copyright 2009-2013 Solarflare Communications Inc.
   5  */
   6 
   7 /*
   8  * Driver for PHY related operations via MCDI.
   9  */
  10 
  11 #include <linux/slab.h>
  12 #include "efx.h"
  13 #include "mcdi.h"
  14 #include "mcdi_pcol.h"
  15 #include "nic.h"
  16 #include "selftest.h"
  17 
  18 struct efx_mcdi_phy_data {
  19         u32 flags;
  20         u32 type;
  21         u32 supported_cap;
  22         u32 channel;
  23         u32 port;
  24         u32 stats_mask;
  25         u8 name[20];
  26         u32 media;
  27         u32 mmd_mask;
  28         u8 revision[20];
  29         u32 forced_cap;
  30 };
  31 
  32 static int
  33 efx_mcdi_get_phy_cfg(struct efx_nic *efx, struct efx_mcdi_phy_data *cfg)
  34 {
  35         MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_CFG_OUT_LEN);
  36         size_t outlen;
  37         int rc;
  38 
  39         BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_IN_LEN != 0);
  40         BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_OUT_NAME_LEN != sizeof(cfg->name));
  41 
  42         rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_CFG, NULL, 0,
  43                           outbuf, sizeof(outbuf), &outlen);
  44         if (rc)
  45                 goto fail;
  46 
  47         if (outlen < MC_CMD_GET_PHY_CFG_OUT_LEN) {
  48                 rc = -EIO;
  49                 goto fail;
  50         }
  51 
  52         cfg->flags = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_FLAGS);
  53         cfg->type = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_TYPE);
  54         cfg->supported_cap =
  55                 MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_SUPPORTED_CAP);
  56         cfg->channel = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_CHANNEL);
  57         cfg->port = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_PRT);
  58         cfg->stats_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_STATS_MASK);
  59         memcpy(cfg->name, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_NAME),
  60                sizeof(cfg->name));
  61         cfg->media = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MEDIA_TYPE);
  62         cfg->mmd_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MMD_MASK);
  63         memcpy(cfg->revision, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_REVISION),
  64                sizeof(cfg->revision));
  65 
  66         return 0;
  67 
  68 fail:
  69         netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
  70         return rc;
  71 }
  72 
  73 static int efx_mcdi_set_link(struct efx_nic *efx, u32 capabilities,
  74                              u32 flags, u32 loopback_mode,
  75                              u32 loopback_speed)
  76 {
  77         MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_LINK_IN_LEN);
  78         int rc;
  79 
  80         BUILD_BUG_ON(MC_CMD_SET_LINK_OUT_LEN != 0);
  81 
  82         MCDI_SET_DWORD(inbuf, SET_LINK_IN_CAP, capabilities);
  83         MCDI_SET_DWORD(inbuf, SET_LINK_IN_FLAGS, flags);
  84         MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_MODE, loopback_mode);
  85         MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_SPEED, loopback_speed);
  86 
  87         rc = efx_mcdi_rpc(efx, MC_CMD_SET_LINK, inbuf, sizeof(inbuf),
  88                           NULL, 0, NULL);
  89         return rc;
  90 }
  91 
  92 static int efx_mcdi_loopback_modes(struct efx_nic *efx, u64 *loopback_modes)
  93 {
  94         MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LOOPBACK_MODES_OUT_LEN);
  95         size_t outlen;
  96         int rc;
  97 
  98         rc = efx_mcdi_rpc(efx, MC_CMD_GET_LOOPBACK_MODES, NULL, 0,
  99                           outbuf, sizeof(outbuf), &outlen);
 100         if (rc)
 101                 goto fail;
 102 
 103         if (outlen < (MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_OFST +
 104                       MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_LEN)) {
 105                 rc = -EIO;
 106                 goto fail;
 107         }
 108 
 109         *loopback_modes = MCDI_QWORD(outbuf, GET_LOOPBACK_MODES_OUT_SUGGESTED);
 110 
 111         return 0;
 112 
 113 fail:
 114         netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
 115         return rc;
 116 }
 117 
 118 static int efx_mcdi_mdio_read(struct net_device *net_dev,
 119                               int prtad, int devad, u16 addr)
 120 {
 121         struct efx_nic *efx = netdev_priv(net_dev);
 122         MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_READ_IN_LEN);
 123         MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_READ_OUT_LEN);
 124         size_t outlen;
 125         int rc;
 126 
 127         MCDI_SET_DWORD(inbuf, MDIO_READ_IN_BUS, efx->mdio_bus);
 128         MCDI_SET_DWORD(inbuf, MDIO_READ_IN_PRTAD, prtad);
 129         MCDI_SET_DWORD(inbuf, MDIO_READ_IN_DEVAD, devad);
 130         MCDI_SET_DWORD(inbuf, MDIO_READ_IN_ADDR, addr);
 131 
 132         rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_READ, inbuf, sizeof(inbuf),
 133                           outbuf, sizeof(outbuf), &outlen);
 134         if (rc)
 135                 return rc;
 136 
 137         if (MCDI_DWORD(outbuf, MDIO_READ_OUT_STATUS) !=
 138             MC_CMD_MDIO_STATUS_GOOD)
 139                 return -EIO;
 140 
 141         return (u16)MCDI_DWORD(outbuf, MDIO_READ_OUT_VALUE);
 142 }
 143 
 144 static int efx_mcdi_mdio_write(struct net_device *net_dev,
 145                                int prtad, int devad, u16 addr, u16 value)
 146 {
 147         struct efx_nic *efx = netdev_priv(net_dev);
 148         MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_WRITE_IN_LEN);
 149         MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_WRITE_OUT_LEN);
 150         size_t outlen;
 151         int rc;
 152 
 153         MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_BUS, efx->mdio_bus);
 154         MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_PRTAD, prtad);
 155         MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_DEVAD, devad);
 156         MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_ADDR, addr);
 157         MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_VALUE, value);
 158 
 159         rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_WRITE, inbuf, sizeof(inbuf),
 160                           outbuf, sizeof(outbuf), &outlen);
 161         if (rc)
 162                 return rc;
 163 
 164         if (MCDI_DWORD(outbuf, MDIO_WRITE_OUT_STATUS) !=
 165             MC_CMD_MDIO_STATUS_GOOD)
 166                 return -EIO;
 167 
 168         return 0;
 169 }
 170 
 171 static void mcdi_to_ethtool_linkset(u32 media, u32 cap, unsigned long *linkset)
 172 {
 173         #define SET_BIT(name)   __set_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
 174                                           linkset)
 175 
 176         bitmap_zero(linkset, __ETHTOOL_LINK_MODE_MASK_NBITS);
 177         switch (media) {
 178         case MC_CMD_MEDIA_KX4:
 179                 SET_BIT(Backplane);
 180                 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
 181                         SET_BIT(1000baseKX_Full);
 182                 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
 183                         SET_BIT(10000baseKX4_Full);
 184                 if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
 185                         SET_BIT(40000baseKR4_Full);
 186                 break;
 187 
 188         case MC_CMD_MEDIA_XFP:
 189         case MC_CMD_MEDIA_SFP_PLUS:
 190         case MC_CMD_MEDIA_QSFP_PLUS:
 191                 SET_BIT(FIBRE);
 192                 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
 193                         SET_BIT(1000baseT_Full);
 194                 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
 195                         SET_BIT(10000baseT_Full);
 196                 if (cap & (1 << MC_CMD_PHY_CAP_40000FDX_LBN))
 197                         SET_BIT(40000baseCR4_Full);
 198                 if (cap & (1 << MC_CMD_PHY_CAP_100000FDX_LBN))
 199                         SET_BIT(100000baseCR4_Full);
 200                 if (cap & (1 << MC_CMD_PHY_CAP_25000FDX_LBN))
 201                         SET_BIT(25000baseCR_Full);
 202                 if (cap & (1 << MC_CMD_PHY_CAP_50000FDX_LBN))
 203                         SET_BIT(50000baseCR2_Full);
 204                 break;
 205 
 206         case MC_CMD_MEDIA_BASE_T:
 207                 SET_BIT(TP);
 208                 if (cap & (1 << MC_CMD_PHY_CAP_10HDX_LBN))
 209                         SET_BIT(10baseT_Half);
 210                 if (cap & (1 << MC_CMD_PHY_CAP_10FDX_LBN))
 211                         SET_BIT(10baseT_Full);
 212                 if (cap & (1 << MC_CMD_PHY_CAP_100HDX_LBN))
 213                         SET_BIT(100baseT_Half);
 214                 if (cap & (1 << MC_CMD_PHY_CAP_100FDX_LBN))
 215                         SET_BIT(100baseT_Full);
 216                 if (cap & (1 << MC_CMD_PHY_CAP_1000HDX_LBN))
 217                         SET_BIT(1000baseT_Half);
 218                 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
 219                         SET_BIT(1000baseT_Full);
 220                 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
 221                         SET_BIT(10000baseT_Full);
 222                 break;
 223         }
 224 
 225         if (cap & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
 226                 SET_BIT(Pause);
 227         if (cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
 228                 SET_BIT(Asym_Pause);
 229         if (cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
 230                 SET_BIT(Autoneg);
 231 
 232         #undef SET_BIT
 233 }
 234 
 235 static u32 ethtool_linkset_to_mcdi_cap(const unsigned long *linkset)
 236 {
 237         u32 result = 0;
 238 
 239         #define TEST_BIT(name)  test_bit(ETHTOOL_LINK_MODE_ ## name ## _BIT, \
 240                                          linkset)
 241 
 242         if (TEST_BIT(10baseT_Half))
 243                 result |= (1 << MC_CMD_PHY_CAP_10HDX_LBN);
 244         if (TEST_BIT(10baseT_Full))
 245                 result |= (1 << MC_CMD_PHY_CAP_10FDX_LBN);
 246         if (TEST_BIT(100baseT_Half))
 247                 result |= (1 << MC_CMD_PHY_CAP_100HDX_LBN);
 248         if (TEST_BIT(100baseT_Full))
 249                 result |= (1 << MC_CMD_PHY_CAP_100FDX_LBN);
 250         if (TEST_BIT(1000baseT_Half))
 251                 result |= (1 << MC_CMD_PHY_CAP_1000HDX_LBN);
 252         if (TEST_BIT(1000baseT_Full) || TEST_BIT(1000baseKX_Full))
 253                 result |= (1 << MC_CMD_PHY_CAP_1000FDX_LBN);
 254         if (TEST_BIT(10000baseT_Full) || TEST_BIT(10000baseKX4_Full))
 255                 result |= (1 << MC_CMD_PHY_CAP_10000FDX_LBN);
 256         if (TEST_BIT(40000baseCR4_Full) || TEST_BIT(40000baseKR4_Full))
 257                 result |= (1 << MC_CMD_PHY_CAP_40000FDX_LBN);
 258         if (TEST_BIT(100000baseCR4_Full))
 259                 result |= (1 << MC_CMD_PHY_CAP_100000FDX_LBN);
 260         if (TEST_BIT(25000baseCR_Full))
 261                 result |= (1 << MC_CMD_PHY_CAP_25000FDX_LBN);
 262         if (TEST_BIT(50000baseCR2_Full))
 263                 result |= (1 << MC_CMD_PHY_CAP_50000FDX_LBN);
 264         if (TEST_BIT(Pause))
 265                 result |= (1 << MC_CMD_PHY_CAP_PAUSE_LBN);
 266         if (TEST_BIT(Asym_Pause))
 267                 result |= (1 << MC_CMD_PHY_CAP_ASYM_LBN);
 268         if (TEST_BIT(Autoneg))
 269                 result |= (1 << MC_CMD_PHY_CAP_AN_LBN);
 270 
 271         #undef TEST_BIT
 272 
 273         return result;
 274 }
 275 
 276 static u32 efx_get_mcdi_phy_flags(struct efx_nic *efx)
 277 {
 278         struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
 279         enum efx_phy_mode mode, supported;
 280         u32 flags;
 281 
 282         /* TODO: Advertise the capabilities supported by this PHY */
 283         supported = 0;
 284         if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_TXDIS_LBN))
 285                 supported |= PHY_MODE_TX_DISABLED;
 286         if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_LOWPOWER_LBN))
 287                 supported |= PHY_MODE_LOW_POWER;
 288         if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_POWEROFF_LBN))
 289                 supported |= PHY_MODE_OFF;
 290 
 291         mode = efx->phy_mode & supported;
 292 
 293         flags = 0;
 294         if (mode & PHY_MODE_TX_DISABLED)
 295                 flags |= (1 << MC_CMD_SET_LINK_IN_TXDIS_LBN);
 296         if (mode & PHY_MODE_LOW_POWER)
 297                 flags |= (1 << MC_CMD_SET_LINK_IN_LOWPOWER_LBN);
 298         if (mode & PHY_MODE_OFF)
 299                 flags |= (1 << MC_CMD_SET_LINK_IN_POWEROFF_LBN);
 300 
 301         return flags;
 302 }
 303 
 304 static u8 mcdi_to_ethtool_media(u32 media)
 305 {
 306         switch (media) {
 307         case MC_CMD_MEDIA_XAUI:
 308         case MC_CMD_MEDIA_CX4:
 309         case MC_CMD_MEDIA_KX4:
 310                 return PORT_OTHER;
 311 
 312         case MC_CMD_MEDIA_XFP:
 313         case MC_CMD_MEDIA_SFP_PLUS:
 314         case MC_CMD_MEDIA_QSFP_PLUS:
 315                 return PORT_FIBRE;
 316 
 317         case MC_CMD_MEDIA_BASE_T:
 318                 return PORT_TP;
 319 
 320         default:
 321                 return PORT_OTHER;
 322         }
 323 }
 324 
 325 static void efx_mcdi_phy_decode_link(struct efx_nic *efx,
 326                               struct efx_link_state *link_state,
 327                               u32 speed, u32 flags, u32 fcntl)
 328 {
 329         switch (fcntl) {
 330         case MC_CMD_FCNTL_AUTO:
 331                 WARN_ON(1);     /* This is not a link mode */
 332                 link_state->fc = EFX_FC_AUTO | EFX_FC_TX | EFX_FC_RX;
 333                 break;
 334         case MC_CMD_FCNTL_BIDIR:
 335                 link_state->fc = EFX_FC_TX | EFX_FC_RX;
 336                 break;
 337         case MC_CMD_FCNTL_RESPOND:
 338                 link_state->fc = EFX_FC_RX;
 339                 break;
 340         default:
 341                 WARN_ON(1);
 342                 /* Fall through */
 343         case MC_CMD_FCNTL_OFF:
 344                 link_state->fc = 0;
 345                 break;
 346         }
 347 
 348         link_state->up = !!(flags & (1 << MC_CMD_GET_LINK_OUT_LINK_UP_LBN));
 349         link_state->fd = !!(flags & (1 << MC_CMD_GET_LINK_OUT_FULL_DUPLEX_LBN));
 350         link_state->speed = speed;
 351 }
 352 
 353 /* The semantics of the ethtool FEC mode bitmask are not well defined,
 354  * particularly the meaning of combinations of bits.  Which means we get to
 355  * define our own semantics, as follows:
 356  * OFF overrides any other bits, and means "disable all FEC" (with the
 357  * exception of 25G KR4/CR4, where it is not possible to reject it if AN
 358  * partner requests it).
 359  * AUTO on its own means use cable requirements and link partner autoneg with
 360  * fw-default preferences for the cable type.
 361  * AUTO and either RS or BASER means use the specified FEC type if cable and
 362  * link partner support it, otherwise autoneg/fw-default.
 363  * RS or BASER alone means use the specified FEC type if cable and link partner
 364  * support it and either requests it, otherwise no FEC.
 365  * Both RS and BASER (whether AUTO or not) means use FEC if cable and link
 366  * partner support it, preferring RS to BASER.
 367  */
 368 static u32 ethtool_fec_caps_to_mcdi(u32 ethtool_cap)
 369 {
 370         u32 ret = 0;
 371 
 372         if (ethtool_cap & ETHTOOL_FEC_OFF)
 373                 return 0;
 374 
 375         if (ethtool_cap & ETHTOOL_FEC_AUTO)
 376                 ret |= (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN) |
 377                        (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN) |
 378                        (1 << MC_CMD_PHY_CAP_RS_FEC_LBN);
 379         if (ethtool_cap & ETHTOOL_FEC_RS)
 380                 ret |= (1 << MC_CMD_PHY_CAP_RS_FEC_LBN) |
 381                        (1 << MC_CMD_PHY_CAP_RS_FEC_REQUESTED_LBN);
 382         if (ethtool_cap & ETHTOOL_FEC_BASER)
 383                 ret |= (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN) |
 384                        (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN) |
 385                        (1 << MC_CMD_PHY_CAP_BASER_FEC_REQUESTED_LBN) |
 386                        (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_REQUESTED_LBN);
 387         return ret;
 388 }
 389 
 390 /* Invert ethtool_fec_caps_to_mcdi.  There are two combinations that function
 391  * can never produce, (baser xor rs) and neither req; the implementation below
 392  * maps both of those to AUTO.  This should never matter, and it's not clear
 393  * what a better mapping would be anyway.
 394  */
 395 static u32 mcdi_fec_caps_to_ethtool(u32 caps, bool is_25g)
 396 {
 397         bool rs = caps & (1 << MC_CMD_PHY_CAP_RS_FEC_LBN),
 398              rs_req = caps & (1 << MC_CMD_PHY_CAP_RS_FEC_REQUESTED_LBN),
 399              baser = is_25g ? caps & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_LBN)
 400                             : caps & (1 << MC_CMD_PHY_CAP_BASER_FEC_LBN),
 401              baser_req = is_25g ? caps & (1 << MC_CMD_PHY_CAP_25G_BASER_FEC_REQUESTED_LBN)
 402                                 : caps & (1 << MC_CMD_PHY_CAP_BASER_FEC_REQUESTED_LBN);
 403 
 404         if (!baser && !rs)
 405                 return ETHTOOL_FEC_OFF;
 406         return (rs_req ? ETHTOOL_FEC_RS : 0) |
 407                (baser_req ? ETHTOOL_FEC_BASER : 0) |
 408                (baser == baser_req && rs == rs_req ? 0 : ETHTOOL_FEC_AUTO);
 409 }
 410 
 411 static int efx_mcdi_phy_probe(struct efx_nic *efx)
 412 {
 413         struct efx_mcdi_phy_data *phy_data;
 414         MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
 415         u32 caps;
 416         int rc;
 417 
 418         /* Initialise and populate phy_data */
 419         phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
 420         if (phy_data == NULL)
 421                 return -ENOMEM;
 422 
 423         rc = efx_mcdi_get_phy_cfg(efx, phy_data);
 424         if (rc != 0)
 425                 goto fail;
 426 
 427         /* Read initial link advertisement */
 428         BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
 429         rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
 430                           outbuf, sizeof(outbuf), NULL);
 431         if (rc)
 432                 goto fail;
 433 
 434         /* Fill out nic state */
 435         efx->phy_data = phy_data;
 436         efx->phy_type = phy_data->type;
 437 
 438         efx->mdio_bus = phy_data->channel;
 439         efx->mdio.prtad = phy_data->port;
 440         efx->mdio.mmds = phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22);
 441         efx->mdio.mode_support = 0;
 442         if (phy_data->mmd_mask & (1 << MC_CMD_MMD_CLAUSE22))
 443                 efx->mdio.mode_support |= MDIO_SUPPORTS_C22;
 444         if (phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22))
 445                 efx->mdio.mode_support |= MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
 446 
 447         caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP);
 448         if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN))
 449                 mcdi_to_ethtool_linkset(phy_data->media, caps,
 450                                         efx->link_advertising);
 451         else
 452                 phy_data->forced_cap = caps;
 453 
 454         /* Assert that we can map efx -> mcdi loopback modes */
 455         BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE);
 456         BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA);
 457         BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC);
 458         BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII);
 459         BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS);
 460         BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI);
 461         BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII);
 462         BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII);
 463         BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR);
 464         BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI);
 465         BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR);
 466         BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR);
 467         BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR);
 468         BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR);
 469         BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY);
 470         BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS);
 471         BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS);
 472         BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD);
 473         BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT);
 474         BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS);
 475         BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS);
 476         BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR);
 477         BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR);
 478         BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS);
 479         BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS);
 480         BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR);
 481         BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS);
 482 
 483         rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes);
 484         if (rc != 0)
 485                 goto fail;
 486         /* The MC indicates that LOOPBACK_NONE is a valid loopback mode,
 487          * but by convention we don't */
 488         efx->loopback_modes &= ~(1 << LOOPBACK_NONE);
 489 
 490         /* Set the initial link mode */
 491         efx_mcdi_phy_decode_link(
 492                 efx, &efx->link_state,
 493                 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
 494                 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
 495                 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
 496 
 497         /* Record the initial FEC configuration (or nearest approximation
 498          * representable in the ethtool configuration space)
 499          */
 500         efx->fec_config = mcdi_fec_caps_to_ethtool(caps,
 501                                                    efx->link_state.speed == 25000 ||
 502                                                    efx->link_state.speed == 50000);
 503 
 504         /* Default to Autonegotiated flow control if the PHY supports it */
 505         efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
 506         if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
 507                 efx->wanted_fc |= EFX_FC_AUTO;
 508         efx_link_set_wanted_fc(efx, efx->wanted_fc);
 509 
 510         return 0;
 511 
 512 fail:
 513         kfree(phy_data);
 514         return rc;
 515 }
 516 
 517 int efx_mcdi_port_reconfigure(struct efx_nic *efx)
 518 {
 519         struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
 520         u32 caps = (efx->link_advertising[0] ?
 521                     ethtool_linkset_to_mcdi_cap(efx->link_advertising) :
 522                     phy_cfg->forced_cap);
 523 
 524         caps |= ethtool_fec_caps_to_mcdi(efx->fec_config);
 525 
 526         return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
 527                                  efx->loopback_mode, 0);
 528 }
 529 
 530 /* Verify that the forced flow control settings (!EFX_FC_AUTO) are
 531  * supported by the link partner. Warn the user if this isn't the case
 532  */
 533 static void efx_mcdi_phy_check_fcntl(struct efx_nic *efx, u32 lpa)
 534 {
 535         struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
 536         u32 rmtadv;
 537 
 538         /* The link partner capabilities are only relevant if the
 539          * link supports flow control autonegotiation */
 540         if (~phy_cfg->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
 541                 return;
 542 
 543         /* If flow control autoneg is supported and enabled, then fine */
 544         if (efx->wanted_fc & EFX_FC_AUTO)
 545                 return;
 546 
 547         rmtadv = 0;
 548         if (lpa & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
 549                 rmtadv |= ADVERTISED_Pause;
 550         if (lpa & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
 551                 rmtadv |=  ADVERTISED_Asym_Pause;
 552 
 553         if ((efx->wanted_fc & EFX_FC_TX) && rmtadv == ADVERTISED_Asym_Pause)
 554                 netif_err(efx, link, efx->net_dev,
 555                           "warning: link partner doesn't support pause frames");
 556 }
 557 
 558 static bool efx_mcdi_phy_poll(struct efx_nic *efx)
 559 {
 560         struct efx_link_state old_state = efx->link_state;
 561         MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
 562         int rc;
 563 
 564         WARN_ON(!mutex_is_locked(&efx->mac_lock));
 565 
 566         BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
 567 
 568         rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
 569                           outbuf, sizeof(outbuf), NULL);
 570         if (rc)
 571                 efx->link_state.up = false;
 572         else
 573                 efx_mcdi_phy_decode_link(
 574                         efx, &efx->link_state,
 575                         MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
 576                         MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
 577                         MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
 578 
 579         return !efx_link_state_equal(&efx->link_state, &old_state);
 580 }
 581 
 582 static void efx_mcdi_phy_remove(struct efx_nic *efx)
 583 {
 584         struct efx_mcdi_phy_data *phy_data = efx->phy_data;
 585 
 586         efx->phy_data = NULL;
 587         kfree(phy_data);
 588 }
 589 
 590 static void efx_mcdi_phy_get_link_ksettings(struct efx_nic *efx,
 591                                             struct ethtool_link_ksettings *cmd)
 592 {
 593         struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
 594         MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
 595         int rc;
 596 
 597         cmd->base.speed = efx->link_state.speed;
 598         cmd->base.duplex = efx->link_state.fd;
 599         cmd->base.port = mcdi_to_ethtool_media(phy_cfg->media);
 600         cmd->base.phy_address = phy_cfg->port;
 601         cmd->base.autoneg = !!(efx->link_advertising[0] & ADVERTISED_Autoneg);
 602         cmd->base.mdio_support = (efx->mdio.mode_support &
 603                               (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22));
 604 
 605         mcdi_to_ethtool_linkset(phy_cfg->media, phy_cfg->supported_cap,
 606                                 cmd->link_modes.supported);
 607         memcpy(cmd->link_modes.advertising, efx->link_advertising,
 608                sizeof(__ETHTOOL_DECLARE_LINK_MODE_MASK()));
 609 
 610         BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
 611         rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
 612                           outbuf, sizeof(outbuf), NULL);
 613         if (rc)
 614                 return;
 615         mcdi_to_ethtool_linkset(phy_cfg->media,
 616                                 MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP),
 617                                 cmd->link_modes.lp_advertising);
 618 }
 619 
 620 static int
 621 efx_mcdi_phy_set_link_ksettings(struct efx_nic *efx,
 622                                 const struct ethtool_link_ksettings *cmd)
 623 {
 624         struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
 625         u32 caps;
 626         int rc;
 627 
 628         if (cmd->base.autoneg) {
 629                 caps = (ethtool_linkset_to_mcdi_cap(cmd->link_modes.advertising) |
 630                         1 << MC_CMD_PHY_CAP_AN_LBN);
 631         } else if (cmd->base.duplex) {
 632                 switch (cmd->base.speed) {
 633                 case 10:     caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN;     break;
 634                 case 100:    caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN;    break;
 635                 case 1000:   caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN;   break;
 636                 case 10000:  caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN;  break;
 637                 case 40000:  caps = 1 << MC_CMD_PHY_CAP_40000FDX_LBN;  break;
 638                 case 100000: caps = 1 << MC_CMD_PHY_CAP_100000FDX_LBN; break;
 639                 case 25000:  caps = 1 << MC_CMD_PHY_CAP_25000FDX_LBN;  break;
 640                 case 50000:  caps = 1 << MC_CMD_PHY_CAP_50000FDX_LBN;  break;
 641                 default:     return -EINVAL;
 642                 }
 643         } else {
 644                 switch (cmd->base.speed) {
 645                 case 10:     caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN;     break;
 646                 case 100:    caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN;    break;
 647                 case 1000:   caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN;   break;
 648                 default:     return -EINVAL;
 649                 }
 650         }
 651 
 652         caps |= ethtool_fec_caps_to_mcdi(efx->fec_config);
 653 
 654         rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
 655                                efx->loopback_mode, 0);
 656         if (rc)
 657                 return rc;
 658 
 659         if (cmd->base.autoneg) {
 660                 efx_link_set_advertising(efx, cmd->link_modes.advertising);
 661                 phy_cfg->forced_cap = 0;
 662         } else {
 663                 efx_link_clear_advertising(efx);
 664                 phy_cfg->forced_cap = caps;
 665         }
 666         return 0;
 667 }
 668 
 669 static int efx_mcdi_phy_get_fecparam(struct efx_nic *efx,
 670                                      struct ethtool_fecparam *fec)
 671 {
 672         MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_V2_LEN);
 673         u32 caps, active, speed; /* MCDI format */
 674         bool is_25g = false;
 675         size_t outlen;
 676         int rc;
 677 
 678         BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
 679         rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
 680                           outbuf, sizeof(outbuf), &outlen);
 681         if (rc)
 682                 return rc;
 683         if (outlen < MC_CMD_GET_LINK_OUT_V2_LEN)
 684                 return -EOPNOTSUPP;
 685 
 686         /* behaviour for 25G/50G links depends on 25G BASER bit */
 687         speed = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_LINK_SPEED);
 688         is_25g = speed == 25000 || speed == 50000;
 689 
 690         caps = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_CAP);
 691         fec->fec = mcdi_fec_caps_to_ethtool(caps, is_25g);
 692         /* BASER is never supported on 100G */
 693         if (speed == 100000)
 694                 fec->fec &= ~ETHTOOL_FEC_BASER;
 695 
 696         active = MCDI_DWORD(outbuf, GET_LINK_OUT_V2_FEC_TYPE);
 697         switch (active) {
 698         case MC_CMD_FEC_NONE:
 699                 fec->active_fec = ETHTOOL_FEC_OFF;
 700                 break;
 701         case MC_CMD_FEC_BASER:
 702                 fec->active_fec = ETHTOOL_FEC_BASER;
 703                 break;
 704         case MC_CMD_FEC_RS:
 705                 fec->active_fec = ETHTOOL_FEC_RS;
 706                 break;
 707         default:
 708                 netif_warn(efx, hw, efx->net_dev,
 709                            "Firmware reports unrecognised FEC_TYPE %u\n",
 710                            active);
 711                 /* We don't know what firmware has picked.  AUTO is as good a
 712                  * "can't happen" value as any other.
 713                  */
 714                 fec->active_fec = ETHTOOL_FEC_AUTO;
 715                 break;
 716         }
 717 
 718         return 0;
 719 }
 720 
 721 static int efx_mcdi_phy_set_fecparam(struct efx_nic *efx,
 722                                      const struct ethtool_fecparam *fec)
 723 {
 724         struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
 725         u32 caps;
 726         int rc;
 727 
 728         /* Work out what efx_mcdi_phy_set_link_ksettings() would produce from
 729          * saved advertising bits
 730          */
 731         if (test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, efx->link_advertising))
 732                 caps = (ethtool_linkset_to_mcdi_cap(efx->link_advertising) |
 733                         1 << MC_CMD_PHY_CAP_AN_LBN);
 734         else
 735                 caps = phy_cfg->forced_cap;
 736 
 737         caps |= ethtool_fec_caps_to_mcdi(fec->fec);
 738         rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
 739                                efx->loopback_mode, 0);
 740         if (rc)
 741                 return rc;
 742 
 743         /* Record the new FEC setting for subsequent set_link calls */
 744         efx->fec_config = fec->fec;
 745         return 0;
 746 }
 747 
 748 static int efx_mcdi_phy_test_alive(struct efx_nic *efx)
 749 {
 750         MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_STATE_OUT_LEN);
 751         size_t outlen;
 752         int rc;
 753 
 754         BUILD_BUG_ON(MC_CMD_GET_PHY_STATE_IN_LEN != 0);
 755 
 756         rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_STATE, NULL, 0,
 757                           outbuf, sizeof(outbuf), &outlen);
 758         if (rc)
 759                 return rc;
 760 
 761         if (outlen < MC_CMD_GET_PHY_STATE_OUT_LEN)
 762                 return -EIO;
 763         if (MCDI_DWORD(outbuf, GET_PHY_STATE_OUT_STATE) != MC_CMD_PHY_STATE_OK)
 764                 return -EINVAL;
 765 
 766         return 0;
 767 }
 768 
 769 static const char *const mcdi_sft9001_cable_diag_names[] = {
 770         "cable.pairA.length",
 771         "cable.pairB.length",
 772         "cable.pairC.length",
 773         "cable.pairD.length",
 774         "cable.pairA.status",
 775         "cable.pairB.status",
 776         "cable.pairC.status",
 777         "cable.pairD.status",
 778 };
 779 
 780 static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode,
 781                          int *results)
 782 {
 783         unsigned int retry, i, count = 0;
 784         size_t outlen;
 785         u32 status;
 786         MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN);
 787         MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN);
 788         u8 *ptr;
 789         int rc;
 790 
 791         BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0);
 792         MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode);
 793         rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST,
 794                           inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL);
 795         if (rc)
 796                 goto out;
 797 
 798         /* Wait up to 10s for BIST to finish */
 799         for (retry = 0; retry < 100; ++retry) {
 800                 BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0);
 801                 rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0,
 802                                   outbuf, sizeof(outbuf), &outlen);
 803                 if (rc)
 804                         goto out;
 805 
 806                 status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT);
 807                 if (status != MC_CMD_POLL_BIST_RUNNING)
 808                         goto finished;
 809 
 810                 msleep(100);
 811         }
 812 
 813         rc = -ETIMEDOUT;
 814         goto out;
 815 
 816 finished:
 817         results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1;
 818 
 819         /* SFT9001 specific cable diagnostics output */
 820         if (efx->phy_type == PHY_TYPE_SFT9001B &&
 821             (bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT ||
 822              bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) {
 823                 ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A);
 824                 if (status == MC_CMD_POLL_BIST_PASSED &&
 825                     outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) {
 826                         for (i = 0; i < 8; i++) {
 827                                 results[count + i] =
 828                                         EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i],
 829                                                         EFX_DWORD_0);
 830                         }
 831                 }
 832                 count += 8;
 833         }
 834         rc = count;
 835 
 836 out:
 837         return rc;
 838 }
 839 
 840 static int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results,
 841                                   unsigned flags)
 842 {
 843         struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
 844         u32 mode;
 845         int rc;
 846 
 847         if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
 848                 rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results);
 849                 if (rc < 0)
 850                         return rc;
 851 
 852                 results += rc;
 853         }
 854 
 855         /* If we support both LONG and SHORT, then run each in response to
 856          * break or not. Otherwise, run the one we support */
 857         mode = 0;
 858         if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) {
 859                 if ((flags & ETH_TEST_FL_OFFLINE) &&
 860                     (phy_cfg->flags &
 861                      (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)))
 862                         mode = MC_CMD_PHY_BIST_CABLE_LONG;
 863                 else
 864                         mode = MC_CMD_PHY_BIST_CABLE_SHORT;
 865         } else if (phy_cfg->flags &
 866                    (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))
 867                 mode = MC_CMD_PHY_BIST_CABLE_LONG;
 868 
 869         if (mode != 0) {
 870                 rc = efx_mcdi_bist(efx, mode, results);
 871                 if (rc < 0)
 872                         return rc;
 873                 results += rc;
 874         }
 875 
 876         return 0;
 877 }
 878 
 879 static const char *efx_mcdi_phy_test_name(struct efx_nic *efx,
 880                                           unsigned int index)
 881 {
 882         struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
 883 
 884         if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
 885                 if (index == 0)
 886                         return "bist";
 887                 --index;
 888         }
 889 
 890         if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) |
 891                               (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) {
 892                 if (index == 0)
 893                         return "cable";
 894                 --index;
 895 
 896                 if (efx->phy_type == PHY_TYPE_SFT9001B) {
 897                         if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names))
 898                                 return mcdi_sft9001_cable_diag_names[index];
 899                         index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names);
 900                 }
 901         }
 902 
 903         return NULL;
 904 }
 905 
 906 #define SFP_PAGE_SIZE           128
 907 #define SFF_DIAG_TYPE_OFFSET    92
 908 #define SFF_DIAG_ADDR_CHANGE    BIT(2)
 909 #define SFF_8079_NUM_PAGES      2
 910 #define SFF_8472_NUM_PAGES      4
 911 #define SFF_8436_NUM_PAGES      5
 912 #define SFF_DMT_LEVEL_OFFSET    94
 913 
 914 /** efx_mcdi_phy_get_module_eeprom_page() - Get a single page of module eeprom
 915  * @efx:        NIC context
 916  * @page:       EEPROM page number
 917  * @data:       Destination data pointer
 918  * @offset:     Offset in page to copy from in to data
 919  * @space:      Space available in data
 920  *
 921  * Return:
 922  *   >=0 - amount of data copied
 923  *   <0  - error
 924  */
 925 static int efx_mcdi_phy_get_module_eeprom_page(struct efx_nic *efx,
 926                                                unsigned int page,
 927                                                u8 *data, ssize_t offset,
 928                                                ssize_t space)
 929 {
 930         MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX);
 931         MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN);
 932         size_t outlen;
 933         unsigned int payload_len;
 934         unsigned int to_copy;
 935         int rc;
 936 
 937         if (offset > SFP_PAGE_SIZE)
 938                 return -EINVAL;
 939 
 940         to_copy = min(space, SFP_PAGE_SIZE - offset);
 941 
 942         MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
 943         rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_PHY_MEDIA_INFO,
 944                                 inbuf, sizeof(inbuf),
 945                                 outbuf, sizeof(outbuf),
 946                                 &outlen);
 947 
 948         if (rc)
 949                 return rc;
 950 
 951         if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
 952                         SFP_PAGE_SIZE))
 953                 return -EIO;
 954 
 955         payload_len = MCDI_DWORD(outbuf, GET_PHY_MEDIA_INFO_OUT_DATALEN);
 956         if (payload_len != SFP_PAGE_SIZE)
 957                 return -EIO;
 958 
 959         memcpy(data, MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + offset,
 960                to_copy);
 961 
 962         return to_copy;
 963 }
 964 
 965 static int efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic *efx,
 966                                                unsigned int page,
 967                                                u8 byte)
 968 {
 969         int rc;
 970         u8 data;
 971 
 972         rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, &data, byte, 1);
 973         if (rc == 1)
 974                 return data;
 975 
 976         return rc;
 977 }
 978 
 979 static int efx_mcdi_phy_diag_type(struct efx_nic *efx)
 980 {
 981         /* Page zero of the EEPROM includes the diagnostic type at byte 92. */
 982         return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
 983                                                    SFF_DIAG_TYPE_OFFSET);
 984 }
 985 
 986 static int efx_mcdi_phy_sff_8472_level(struct efx_nic *efx)
 987 {
 988         /* Page zero of the EEPROM includes the DMT level at byte 94. */
 989         return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
 990                                                    SFF_DMT_LEVEL_OFFSET);
 991 }
 992 
 993 static u32 efx_mcdi_phy_module_type(struct efx_nic *efx)
 994 {
 995         struct efx_mcdi_phy_data *phy_data = efx->phy_data;
 996 
 997         if (phy_data->media != MC_CMD_MEDIA_QSFP_PLUS)
 998                 return phy_data->media;
 999 
1000         /* A QSFP+ NIC may actually have an SFP+ module attached.
1001          * The ID is page 0, byte 0.
1002          */
1003         switch (efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 0)) {
1004         case 0x3:
1005                 return MC_CMD_MEDIA_SFP_PLUS;
1006         case 0xc:
1007         case 0xd:
1008                 return MC_CMD_MEDIA_QSFP_PLUS;
1009         default:
1010                 return 0;
1011         }
1012 }
1013 
1014 static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
1015                                           struct ethtool_eeprom *ee, u8 *data)
1016 {
1017         int rc;
1018         ssize_t space_remaining = ee->len;
1019         unsigned int page_off;
1020         bool ignore_missing;
1021         int num_pages;
1022         int page;
1023 
1024         switch (efx_mcdi_phy_module_type(efx)) {
1025         case MC_CMD_MEDIA_SFP_PLUS:
1026                 num_pages = efx_mcdi_phy_sff_8472_level(efx) > 0 ?
1027                                 SFF_8472_NUM_PAGES : SFF_8079_NUM_PAGES;
1028                 page = 0;
1029                 ignore_missing = false;
1030                 break;
1031         case MC_CMD_MEDIA_QSFP_PLUS:
1032                 num_pages = SFF_8436_NUM_PAGES;
1033                 page = -1; /* We obtain the lower page by asking for -1. */
1034                 ignore_missing = true; /* Ignore missing pages after page 0. */
1035                 break;
1036         default:
1037                 return -EOPNOTSUPP;
1038         }
1039 
1040         page_off = ee->offset % SFP_PAGE_SIZE;
1041         page += ee->offset / SFP_PAGE_SIZE;
1042 
1043         while (space_remaining && (page < num_pages)) {
1044                 rc = efx_mcdi_phy_get_module_eeprom_page(efx, page,
1045                                                          data, page_off,
1046                                                          space_remaining);
1047 
1048                 if (rc > 0) {
1049                         space_remaining -= rc;
1050                         data += rc;
1051                         page_off = 0;
1052                         page++;
1053                 } else if (rc == 0) {
1054                         space_remaining = 0;
1055                 } else if (ignore_missing && (page > 0)) {
1056                         int intended_size = SFP_PAGE_SIZE - page_off;
1057 
1058                         space_remaining -= intended_size;
1059                         if (space_remaining < 0) {
1060                                 space_remaining = 0;
1061                         } else {
1062                                 memset(data, 0, intended_size);
1063                                 data += intended_size;
1064                                 page_off = 0;
1065                                 page++;
1066                                 rc = 0;
1067                         }
1068                 } else {
1069                         return rc;
1070                 }
1071         }
1072 
1073         return 0;
1074 }
1075 
1076 static int efx_mcdi_phy_get_module_info(struct efx_nic *efx,
1077                                         struct ethtool_modinfo *modinfo)
1078 {
1079         int sff_8472_level;
1080         int diag_type;
1081 
1082         switch (efx_mcdi_phy_module_type(efx)) {
1083         case MC_CMD_MEDIA_SFP_PLUS:
1084                 sff_8472_level = efx_mcdi_phy_sff_8472_level(efx);
1085 
1086                 /* If we can't read the diagnostics level we have none. */
1087                 if (sff_8472_level < 0)
1088                         return -EOPNOTSUPP;
1089 
1090                 /* Check if this module requires the (unsupported) address
1091                  * change operation.
1092                  */
1093                 diag_type = efx_mcdi_phy_diag_type(efx);
1094 
1095                 if ((sff_8472_level == 0) ||
1096                     (diag_type & SFF_DIAG_ADDR_CHANGE)) {
1097                         modinfo->type = ETH_MODULE_SFF_8079;
1098                         modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
1099                 } else {
1100                         modinfo->type = ETH_MODULE_SFF_8472;
1101                         modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
1102                 }
1103                 break;
1104 
1105         case MC_CMD_MEDIA_QSFP_PLUS:
1106                 modinfo->type = ETH_MODULE_SFF_8436;
1107                 modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
1108                 break;
1109 
1110         default:
1111                 return -EOPNOTSUPP;
1112         }
1113 
1114         return 0;
1115 }
1116 
1117 static const struct efx_phy_operations efx_mcdi_phy_ops = {
1118         .probe          = efx_mcdi_phy_probe,
1119         .init           = efx_port_dummy_op_int,
1120         .reconfigure    = efx_mcdi_port_reconfigure,
1121         .poll           = efx_mcdi_phy_poll,
1122         .fini           = efx_port_dummy_op_void,
1123         .remove         = efx_mcdi_phy_remove,
1124         .get_link_ksettings = efx_mcdi_phy_get_link_ksettings,
1125         .set_link_ksettings = efx_mcdi_phy_set_link_ksettings,
1126         .get_fecparam   = efx_mcdi_phy_get_fecparam,
1127         .set_fecparam   = efx_mcdi_phy_set_fecparam,
1128         .test_alive     = efx_mcdi_phy_test_alive,
1129         .run_tests      = efx_mcdi_phy_run_tests,
1130         .test_name      = efx_mcdi_phy_test_name,
1131         .get_module_eeprom = efx_mcdi_phy_get_module_eeprom,
1132         .get_module_info = efx_mcdi_phy_get_module_info,
1133 };
1134 
1135 u32 efx_mcdi_phy_get_caps(struct efx_nic *efx)
1136 {
1137         struct efx_mcdi_phy_data *phy_data = efx->phy_data;
1138 
1139         return phy_data->supported_cap;
1140 }
1141 
1142 static unsigned int efx_mcdi_event_link_speed[] = {
1143         [MCDI_EVENT_LINKCHANGE_SPEED_100M] = 100,
1144         [MCDI_EVENT_LINKCHANGE_SPEED_1G] = 1000,
1145         [MCDI_EVENT_LINKCHANGE_SPEED_10G] = 10000,
1146         [MCDI_EVENT_LINKCHANGE_SPEED_40G] = 40000,
1147         [MCDI_EVENT_LINKCHANGE_SPEED_25G] = 25000,
1148         [MCDI_EVENT_LINKCHANGE_SPEED_50G] = 50000,
1149         [MCDI_EVENT_LINKCHANGE_SPEED_100G] = 100000,
1150 };
1151 
1152 void efx_mcdi_process_link_change(struct efx_nic *efx, efx_qword_t *ev)
1153 {
1154         u32 flags, fcntl, speed, lpa;
1155 
1156         speed = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_SPEED);
1157         EFX_WARN_ON_PARANOID(speed >= ARRAY_SIZE(efx_mcdi_event_link_speed));
1158         speed = efx_mcdi_event_link_speed[speed];
1159 
1160         flags = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LINK_FLAGS);
1161         fcntl = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_FCNTL);
1162         lpa = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LP_CAP);
1163 
1164         /* efx->link_state is only modified by efx_mcdi_phy_get_link(),
1165          * which is only run after flushing the event queues. Therefore, it
1166          * is safe to modify the link state outside of the mac_lock here.
1167          */
1168         efx_mcdi_phy_decode_link(efx, &efx->link_state, speed, flags, fcntl);
1169 
1170         efx_mcdi_phy_check_fcntl(efx, lpa);
1171 
1172         efx_link_status_changed(efx);
1173 }
1174 
1175 int efx_mcdi_set_mac(struct efx_nic *efx)
1176 {
1177         u32 fcntl;
1178         MCDI_DECLARE_BUF(cmdbytes, MC_CMD_SET_MAC_IN_LEN);
1179 
1180         BUILD_BUG_ON(MC_CMD_SET_MAC_OUT_LEN != 0);
1181 
1182         /* This has no effect on EF10 */
1183         ether_addr_copy(MCDI_PTR(cmdbytes, SET_MAC_IN_ADDR),
1184                         efx->net_dev->dev_addr);
1185 
1186         MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_MTU,
1187                         EFX_MAX_FRAME_LEN(efx->net_dev->mtu));
1188         MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_DRAIN, 0);
1189 
1190         /* Set simple MAC filter for Siena */
1191         MCDI_POPULATE_DWORD_1(cmdbytes, SET_MAC_IN_REJECT,
1192                               SET_MAC_IN_REJECT_UNCST, efx->unicast_filter);
1193 
1194         MCDI_POPULATE_DWORD_1(cmdbytes, SET_MAC_IN_FLAGS,
1195                               SET_MAC_IN_FLAG_INCLUDE_FCS,
1196                               !!(efx->net_dev->features & NETIF_F_RXFCS));
1197 
1198         switch (efx->wanted_fc) {
1199         case EFX_FC_RX | EFX_FC_TX:
1200                 fcntl = MC_CMD_FCNTL_BIDIR;
1201                 break;
1202         case EFX_FC_RX:
1203                 fcntl = MC_CMD_FCNTL_RESPOND;
1204                 break;
1205         default:
1206                 fcntl = MC_CMD_FCNTL_OFF;
1207                 break;
1208         }
1209         if (efx->wanted_fc & EFX_FC_AUTO)
1210                 fcntl = MC_CMD_FCNTL_AUTO;
1211         if (efx->fc_disable)
1212                 fcntl = MC_CMD_FCNTL_OFF;
1213 
1214         MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_FCNTL, fcntl);
1215 
1216         return efx_mcdi_rpc(efx, MC_CMD_SET_MAC, cmdbytes, sizeof(cmdbytes),
1217                             NULL, 0, NULL);
1218 }
1219 
1220 bool efx_mcdi_mac_check_fault(struct efx_nic *efx)
1221 {
1222         MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
1223         size_t outlength;
1224         int rc;
1225 
1226         BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
1227 
1228         rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
1229                           outbuf, sizeof(outbuf), &outlength);
1230         if (rc)
1231                 return true;
1232 
1233         return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0;
1234 }
1235 
1236 enum efx_stats_action {
1237         EFX_STATS_ENABLE,
1238         EFX_STATS_DISABLE,
1239         EFX_STATS_PULL,
1240 };
1241 
1242 static int efx_mcdi_mac_stats(struct efx_nic *efx,
1243                               enum efx_stats_action action, int clear)
1244 {
1245         MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN);
1246         int rc;
1247         int change = action == EFX_STATS_PULL ? 0 : 1;
1248         int enable = action == EFX_STATS_ENABLE ? 1 : 0;
1249         int period = action == EFX_STATS_ENABLE ? 1000 : 0;
1250         dma_addr_t dma_addr = efx->stats_buffer.dma_addr;
1251         u32 dma_len = action != EFX_STATS_DISABLE ?
1252                 efx->num_mac_stats * sizeof(u64) : 0;
1253 
1254         BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0);
1255 
1256         MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr);
1257         MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD,
1258                               MAC_STATS_IN_DMA, !!enable,
1259                               MAC_STATS_IN_CLEAR, clear,
1260                               MAC_STATS_IN_PERIODIC_CHANGE, change,
1261                               MAC_STATS_IN_PERIODIC_ENABLE, enable,
1262                               MAC_STATS_IN_PERIODIC_CLEAR, 0,
1263                               MAC_STATS_IN_PERIODIC_NOEVENT, 1,
1264                               MAC_STATS_IN_PERIOD_MS, period);
1265         MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len);
1266 
1267         if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) {
1268                 struct efx_ef10_nic_data *nic_data = efx->nic_data;
1269 
1270                 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_PORT_ID, nic_data->vport_id);
1271         }
1272 
1273         rc = efx_mcdi_rpc_quiet(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf),
1274                                 NULL, 0, NULL);
1275         /* Expect ENOENT if DMA queues have not been set up */
1276         if (rc && (rc != -ENOENT || atomic_read(&efx->active_queues)))
1277                 efx_mcdi_display_error(efx, MC_CMD_MAC_STATS, sizeof(inbuf),
1278                                        NULL, 0, rc);
1279         return rc;
1280 }
1281 
1282 void efx_mcdi_mac_start_stats(struct efx_nic *efx)
1283 {
1284         __le64 *dma_stats = efx->stats_buffer.addr;
1285 
1286         dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
1287 
1288         efx_mcdi_mac_stats(efx, EFX_STATS_ENABLE, 0);
1289 }
1290 
1291 void efx_mcdi_mac_stop_stats(struct efx_nic *efx)
1292 {
1293         efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 0);
1294 }
1295 
1296 #define EFX_MAC_STATS_WAIT_US 100
1297 #define EFX_MAC_STATS_WAIT_ATTEMPTS 10
1298 
1299 void efx_mcdi_mac_pull_stats(struct efx_nic *efx)
1300 {
1301         __le64 *dma_stats = efx->stats_buffer.addr;
1302         int attempts = EFX_MAC_STATS_WAIT_ATTEMPTS;
1303 
1304         dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
1305         efx_mcdi_mac_stats(efx, EFX_STATS_PULL, 0);
1306 
1307         while (dma_stats[efx->num_mac_stats - 1] ==
1308                                 EFX_MC_STATS_GENERATION_INVALID &&
1309                         attempts-- != 0)
1310                 udelay(EFX_MAC_STATS_WAIT_US);
1311 }
1312 
1313 int efx_mcdi_port_probe(struct efx_nic *efx)
1314 {
1315         int rc;
1316 
1317         /* Hook in PHY operations table */
1318         efx->phy_op = &efx_mcdi_phy_ops;
1319 
1320         /* Set up MDIO structure for PHY */
1321         efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
1322         efx->mdio.mdio_read = efx_mcdi_mdio_read;
1323         efx->mdio.mdio_write = efx_mcdi_mdio_write;
1324 
1325         /* Fill out MDIO structure, loopback modes, and initial link state */
1326         rc = efx->phy_op->probe(efx);
1327         if (rc != 0)
1328                 return rc;
1329 
1330         /* Allocate buffer for stats */
1331         rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
1332                                   efx->num_mac_stats * sizeof(u64), GFP_KERNEL);
1333         if (rc)
1334                 return rc;
1335         netif_dbg(efx, probe, efx->net_dev,
1336                   "stats buffer at %llx (virt %p phys %llx)\n",
1337                   (u64)efx->stats_buffer.dma_addr,
1338                   efx->stats_buffer.addr,
1339                   (u64)virt_to_phys(efx->stats_buffer.addr));
1340 
1341         efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 1);
1342 
1343         return 0;
1344 }
1345 
1346 void efx_mcdi_port_remove(struct efx_nic *efx)
1347 {
1348         efx->phy_op->remove(efx);
1349         efx_nic_free_buffer(efx, &efx->stats_buffer);
1350 }
1351 
1352 /* Get physical port number (EF10 only; on Siena it is same as PF number) */
1353 int efx_mcdi_port_get_number(struct efx_nic *efx)
1354 {
1355         MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PORT_ASSIGNMENT_OUT_LEN);
1356         int rc;
1357 
1358         rc = efx_mcdi_rpc(efx, MC_CMD_GET_PORT_ASSIGNMENT, NULL, 0,
1359                           outbuf, sizeof(outbuf), NULL);
1360         if (rc)
1361                 return rc;
1362 
1363         return MCDI_DWORD(outbuf, GET_PORT_ASSIGNMENT_OUT_PORT);
1364 }

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