drivers/net/sfc/base/efx_nic.c

   1 /*
   2  * Copyright (c) 2007-2016 Solarflare Communications Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright notice,
   9  *    this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright notice,
  11  *    this list of conditions and the following disclaimer in the documentation
  12  *    and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  15  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  16  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  21  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  22  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  23  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  24  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * The views and conclusions contained in the software and documentation are
  27  * those of the authors and should not be interpreted as representing official
  28  * policies, either expressed or implied, of the FreeBSD Project.
  29  */
  30
  31 #include "efx.h"
  32 #include "efx_impl.h"
  33
  34         __checkReturn   efx_rc_t
  35 efx_family(
  36         __in            uint16_t venid,
  37         __in            uint16_t devid,
  38         __out           efx_family_t *efp)
  39 {
  40         if (venid == EFX_PCI_VENID_SFC) {
  41                 switch (devid) {
  42 #if EFSYS_OPT_SIENA
  43                 case EFX_PCI_DEVID_SIENA_F1_UNINIT:
  44                         /*
  45                          * Hardware default for PF0 of uninitialised Siena.
  46                          * manftest must be able to cope with this device id.
  47                          */
  48                         *efp = EFX_FAMILY_SIENA;
  49                         return (0);
  50
  51                 case EFX_PCI_DEVID_BETHPAGE:
  52                 case EFX_PCI_DEVID_SIENA:
  53                         *efp = EFX_FAMILY_SIENA;
  54                         return (0);
  55 #endif /* EFSYS_OPT_SIENA */
  56
  57 #if EFSYS_OPT_HUNTINGTON
  58                 case EFX_PCI_DEVID_HUNTINGTON_PF_UNINIT:
  59                         /*
  60                          * Hardware default for PF0 of uninitialised Huntington.
  61                          * manftest must be able to cope with this device id.
  62                          */
  63                         *efp = EFX_FAMILY_HUNTINGTON;
  64                         return (0);
  65
  66                 case EFX_PCI_DEVID_FARMINGDALE:
  67                 case EFX_PCI_DEVID_GREENPORT:
  68                         *efp = EFX_FAMILY_HUNTINGTON;
  69                         return (0);
  70
  71                 case EFX_PCI_DEVID_FARMINGDALE_VF:
  72                 case EFX_PCI_DEVID_GREENPORT_VF:
  73                         *efp = EFX_FAMILY_HUNTINGTON;
  74                         return (0);
  75 #endif /* EFSYS_OPT_HUNTINGTON */
  76
  77 #if EFSYS_OPT_MEDFORD
  78                 case EFX_PCI_DEVID_MEDFORD_PF_UNINIT:
  79                         /*
  80                          * Hardware default for PF0 of uninitialised Medford.
  81                          * manftest must be able to cope with this device id.
  82                          */
  83                         *efp = EFX_FAMILY_MEDFORD;
  84                         return (0);
  85
  86                 case EFX_PCI_DEVID_MEDFORD:
  87                         *efp = EFX_FAMILY_MEDFORD;
  88                         return (0);
  89
  90                 case EFX_PCI_DEVID_MEDFORD_VF:
  91                         *efp = EFX_FAMILY_MEDFORD;
  92                         return (0);
  93 #endif /* EFSYS_OPT_MEDFORD */
  94
  95                 case EFX_PCI_DEVID_FALCON:      /* Obsolete, not supported */
  96                 default:
  97                         break;
  98                 }
  99         }
 100
 101         *efp = EFX_FAMILY_INVALID;
 102         return (ENOTSUP);
 103 }
 104
 105
 106 #define EFX_BIU_MAGIC0  0x01234567
 107 #define EFX_BIU_MAGIC1  0xfedcba98
 108
 109         __checkReturn   efx_rc_t
 110 efx_nic_biu_test(
 111         __in            efx_nic_t *enp)
 112 {
 113         efx_oword_t oword;
 114         efx_rc_t rc;
 115
 116         /*
 117          * Write magic values to scratch registers 0 and 1, then
 118          * verify that the values were written correctly.  Interleave
 119          * the accesses to ensure that the BIU is not just reading
 120          * back the cached value that was last written.
 121          */
 122         EFX_POPULATE_OWORD_1(oword, FRF_AZ_DRIVER_DW0, EFX_BIU_MAGIC0);
 123         EFX_BAR_TBL_WRITEO(enp, FR_AZ_DRIVER_REG, 0, &oword, B_TRUE);
 124
 125         EFX_POPULATE_OWORD_1(oword, FRF_AZ_DRIVER_DW0, EFX_BIU_MAGIC1);
 126         EFX_BAR_TBL_WRITEO(enp, FR_AZ_DRIVER_REG, 1, &oword, B_TRUE);
 127
 128         EFX_BAR_TBL_READO(enp, FR_AZ_DRIVER_REG, 0, &oword, B_TRUE);
 129         if (EFX_OWORD_FIELD(oword, FRF_AZ_DRIVER_DW0) != EFX_BIU_MAGIC0) {
 130                 rc = EIO;
 131                 goto fail1;
 132         }
 133
 134         EFX_BAR_TBL_READO(enp, FR_AZ_DRIVER_REG, 1, &oword, B_TRUE);
 135         if (EFX_OWORD_FIELD(oword, FRF_AZ_DRIVER_DW0) != EFX_BIU_MAGIC1) {
 136                 rc = EIO;
 137                 goto fail2;
 138         }
 139
 140         /*
 141          * Perform the same test, with the values swapped.  This
 142          * ensures that subsequent tests don't start with the correct
 143          * values already written into the scratch registers.
 144          */
 145         EFX_POPULATE_OWORD_1(oword, FRF_AZ_DRIVER_DW0, EFX_BIU_MAGIC1);
 146         EFX_BAR_TBL_WRITEO(enp, FR_AZ_DRIVER_REG, 0, &oword, B_TRUE);
 147
 148         EFX_POPULATE_OWORD_1(oword, FRF_AZ_DRIVER_DW0, EFX_BIU_MAGIC0);
 149         EFX_BAR_TBL_WRITEO(enp, FR_AZ_DRIVER_REG, 1, &oword, B_TRUE);
 150
 151         EFX_BAR_TBL_READO(enp, FR_AZ_DRIVER_REG, 0, &oword, B_TRUE);
 152         if (EFX_OWORD_FIELD(oword, FRF_AZ_DRIVER_DW0) != EFX_BIU_MAGIC1) {
 153                 rc = EIO;
 154                 goto fail3;
 155         }
 156
 157         EFX_BAR_TBL_READO(enp, FR_AZ_DRIVER_REG, 1, &oword, B_TRUE);
 158         if (EFX_OWORD_FIELD(oword, FRF_AZ_DRIVER_DW0) != EFX_BIU_MAGIC0) {
 159                 rc = EIO;
 160                 goto fail4;
 161         }
 162
 163         return (0);
 164
 165 fail4:
 166         EFSYS_PROBE(fail4);
 167 fail3:
 168         EFSYS_PROBE(fail3);
 169 fail2:
 170         EFSYS_PROBE(fail2);
 171 fail1:
 172         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 173
 174         return (rc);
 175 }
 176
 177 #if EFSYS_OPT_SIENA
 178
 179 static const efx_nic_ops_t      __efx_nic_siena_ops = {
 180         siena_nic_probe,                /* eno_probe */
 181         NULL,                           /* eno_board_cfg */
 182         NULL,                           /* eno_set_drv_limits */
 183         siena_nic_reset,                /* eno_reset */
 184         siena_nic_init,                 /* eno_init */
 185         NULL,                           /* eno_get_vi_pool */
 186         NULL,                           /* eno_get_bar_region */
 187 #if EFSYS_OPT_DIAG
 188         siena_nic_register_test,        /* eno_register_test */
 189 #endif  /* EFSYS_OPT_DIAG */
 190         siena_nic_fini,                 /* eno_fini */
 191         siena_nic_unprobe,              /* eno_unprobe */
 192 };
 193
 194 #endif  /* EFSYS_OPT_SIENA */
 195
 196 #if EFSYS_OPT_HUNTINGTON
 197
 198 static const efx_nic_ops_t      __efx_nic_hunt_ops = {
 199         ef10_nic_probe,                 /* eno_probe */
 200         hunt_board_cfg,                 /* eno_board_cfg */
 201         ef10_nic_set_drv_limits,        /* eno_set_drv_limits */
 202         ef10_nic_reset,                 /* eno_reset */
 203         ef10_nic_init,                  /* eno_init */
 204         ef10_nic_get_vi_pool,           /* eno_get_vi_pool */
 205         ef10_nic_get_bar_region,        /* eno_get_bar_region */
 206 #if EFSYS_OPT_DIAG
 207         ef10_nic_register_test,         /* eno_register_test */
 208 #endif  /* EFSYS_OPT_DIAG */
 209         ef10_nic_fini,                  /* eno_fini */
 210         ef10_nic_unprobe,               /* eno_unprobe */
 211 };
 212
 213 #endif  /* EFSYS_OPT_HUNTINGTON */
 214
 215 #if EFSYS_OPT_MEDFORD
 216
 217 static const efx_nic_ops_t      __efx_nic_medford_ops = {
 218         ef10_nic_probe,                 /* eno_probe */
 219         medford_board_cfg,              /* eno_board_cfg */
 220         ef10_nic_set_drv_limits,        /* eno_set_drv_limits */
 221         ef10_nic_reset,                 /* eno_reset */
 222         ef10_nic_init,                  /* eno_init */
 223         ef10_nic_get_vi_pool,           /* eno_get_vi_pool */
 224         ef10_nic_get_bar_region,        /* eno_get_bar_region */
 225 #if EFSYS_OPT_DIAG
 226         ef10_nic_register_test,         /* eno_register_test */
 227 #endif  /* EFSYS_OPT_DIAG */
 228         ef10_nic_fini,                  /* eno_fini */
 229         ef10_nic_unprobe,               /* eno_unprobe */
 230 };
 231
 232 #endif  /* EFSYS_OPT_MEDFORD */
 233
 234
 235         __checkReturn   efx_rc_t
 236 efx_nic_create(
 237         __in            efx_family_t family,
 238         __in            efsys_identifier_t *esip,
 239         __in            efsys_bar_t *esbp,
 240         __in            efsys_lock_t *eslp,
 241         __deref_out     efx_nic_t **enpp)
 242 {
 243         efx_nic_t *enp;
 244         efx_rc_t rc;
 245
 246         EFSYS_ASSERT3U(family, >, EFX_FAMILY_INVALID);
 247         EFSYS_ASSERT3U(family, <, EFX_FAMILY_NTYPES);
 248
 249         /* Allocate a NIC object */
 250         EFSYS_KMEM_ALLOC(esip, sizeof (efx_nic_t), enp);
 251
 252         if (enp == NULL) {
 253                 rc = ENOMEM;
 254                 goto fail1;
 255         }
 256
 257         enp->en_magic = EFX_NIC_MAGIC;
 258
 259         switch (family) {
 260 #if EFSYS_OPT_SIENA
 261         case EFX_FAMILY_SIENA:
 262                 enp->en_enop = &__efx_nic_siena_ops;
 263                 enp->en_features =
 264                     EFX_FEATURE_IPV6 |
 265                     EFX_FEATURE_LFSR_HASH_INSERT |
 266                     EFX_FEATURE_LINK_EVENTS |
 267                     EFX_FEATURE_PERIODIC_MAC_STATS |
 268                     EFX_FEATURE_MCDI |
 269                     EFX_FEATURE_LOOKAHEAD_SPLIT |
 270                     EFX_FEATURE_MAC_HEADER_FILTERS |
 271                     EFX_FEATURE_TX_SRC_FILTERS;
 272                 break;
 273 #endif  /* EFSYS_OPT_SIENA */
 274
 275 #if EFSYS_OPT_HUNTINGTON
 276         case EFX_FAMILY_HUNTINGTON:
 277                 enp->en_enop = &__efx_nic_hunt_ops;
 278                 enp->en_features =
 279                     EFX_FEATURE_IPV6 |
 280                     EFX_FEATURE_LINK_EVENTS |
 281                     EFX_FEATURE_PERIODIC_MAC_STATS |
 282                     EFX_FEATURE_MCDI |
 283                     EFX_FEATURE_MAC_HEADER_FILTERS |
 284                     EFX_FEATURE_MCDI_DMA |
 285                     EFX_FEATURE_PIO_BUFFERS |
 286                     EFX_FEATURE_FW_ASSISTED_TSO |
 287                     EFX_FEATURE_FW_ASSISTED_TSO_V2 |
 288                     EFX_FEATURE_PACKED_STREAM;
 289                 break;
 290 #endif  /* EFSYS_OPT_HUNTINGTON */
 291
 292 #if EFSYS_OPT_MEDFORD
 293         case EFX_FAMILY_MEDFORD:
 294                 enp->en_enop = &__efx_nic_medford_ops;
 295                 /*
 296                  * FW_ASSISTED_TSO omitted as Medford only supports firmware
 297                  * assisted TSO version 2, not the v1 scheme used on Huntington.
 298                  */
 299                 enp->en_features =
 300                     EFX_FEATURE_IPV6 |
 301                     EFX_FEATURE_LINK_EVENTS |
 302                     EFX_FEATURE_PERIODIC_MAC_STATS |
 303                     EFX_FEATURE_MCDI |
 304                     EFX_FEATURE_MAC_HEADER_FILTERS |
 305                     EFX_FEATURE_MCDI_DMA |
 306                     EFX_FEATURE_PIO_BUFFERS |
 307                     EFX_FEATURE_FW_ASSISTED_TSO_V2 |
 308                     EFX_FEATURE_PACKED_STREAM;
 309                 break;
 310 #endif  /* EFSYS_OPT_MEDFORD */
 311
 312         default:
 313                 rc = ENOTSUP;
 314                 goto fail2;
 315         }
 316
 317         enp->en_family = family;
 318         enp->en_esip = esip;
 319         enp->en_esbp = esbp;
 320         enp->en_eslp = eslp;
 321
 322         *enpp = enp;
 323
 324         return (0);
 325
 326 fail2:
 327         EFSYS_PROBE(fail2);
 328
 329         enp->en_magic = 0;
 330
 331         /* Free the NIC object */
 332         EFSYS_KMEM_FREE(esip, sizeof (efx_nic_t), enp);
 333
 334 fail1:
 335         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 336
 337         return (rc);
 338 }
 339
 340         __checkReturn   efx_rc_t
 341 efx_nic_probe(
 342         __in            efx_nic_t *enp)
 343 {
 344         const efx_nic_ops_t *enop;
 345         efx_rc_t rc;
 346
 347         EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
 348 #if EFSYS_OPT_MCDI
 349         EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_MCDI);
 350 #endif  /* EFSYS_OPT_MCDI */
 351         EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_PROBE));
 352
 353         enop = enp->en_enop;
 354         if ((rc = enop->eno_probe(enp)) != 0)
 355                 goto fail1;
 356
 357         if ((rc = efx_phy_probe(enp)) != 0)
 358                 goto fail2;
 359
 360         enp->en_mod_flags |= EFX_MOD_PROBE;
 361
 362         return (0);
 363
 364 fail2:
 365         EFSYS_PROBE(fail2);
 366
 367         enop->eno_unprobe(enp);
 368
 369 fail1:
 370         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 371
 372         return (rc);
 373 }
 374
 375         __checkReturn   efx_rc_t
 376 efx_nic_set_drv_limits(
 377         __inout         efx_nic_t *enp,
 378         __in            efx_drv_limits_t *edlp)
 379 {
 380         const efx_nic_ops_t *enop = enp->en_enop;
 381         efx_rc_t rc;
 382
 383         EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
 384         EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_PROBE);
 385
 386         if (enop->eno_set_drv_limits != NULL) {
 387                 if ((rc = enop->eno_set_drv_limits(enp, edlp)) != 0)
 388                         goto fail1;
 389         }
 390
 391         return (0);
 392
 393 fail1:
 394         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 395
 396         return (rc);
 397 }
 398
 399         __checkReturn   efx_rc_t
 400 efx_nic_get_bar_region(
 401         __in            efx_nic_t *enp,
 402         __in            efx_nic_region_t region,
 403         __out           uint32_t *offsetp,
 404         __out           size_t *sizep)
 405 {
 406         const efx_nic_ops_t *enop = enp->en_enop;
 407         efx_rc_t rc;
 408
 409         EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
 410         EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_PROBE);
 411         EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_NIC);
 412
 413         if (enop->eno_get_bar_region == NULL) {
 414                 rc = ENOTSUP;
 415                 goto fail1;
 416         }
 417         if ((rc = (enop->eno_get_bar_region)(enp,
 418                     region, offsetp, sizep)) != 0) {
 419                 goto fail2;
 420         }
 421
 422         return (0);
 423
 424 fail2:
 425         EFSYS_PROBE(fail2);
 426
 427 fail1:
 428         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 429
 430         return (rc);
 431 }
 432
 433
 434         __checkReturn   efx_rc_t
 435 efx_nic_get_vi_pool(
 436         __in            efx_nic_t *enp,
 437         __out           uint32_t *evq_countp,
 438         __out           uint32_t *rxq_countp,
 439         __out           uint32_t *txq_countp)
 440 {
 441         const efx_nic_ops_t *enop = enp->en_enop;
 442         efx_nic_cfg_t *encp = &enp->en_nic_cfg;
 443         efx_rc_t rc;
 444
 445         EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
 446         EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_PROBE);
 447         EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_NIC);
 448
 449         if (enop->eno_get_vi_pool != NULL) {
 450                 uint32_t vi_count = 0;
 451
 452                 if ((rc = (enop->eno_get_vi_pool)(enp, &vi_count)) != 0)
 453                         goto fail1;
 454
 455                 *evq_countp = vi_count;
 456                 *rxq_countp = vi_count;
 457                 *txq_countp = vi_count;
 458         } else {
 459                 /* Use NIC limits as default value */
 460                 *evq_countp = encp->enc_evq_limit;
 461                 *rxq_countp = encp->enc_rxq_limit;
 462                 *txq_countp = encp->enc_txq_limit;
 463         }
 464
 465         return (0);
 466
 467 fail1:
 468         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 469
 470         return (rc);
 471 }
 472
 473
 474         __checkReturn   efx_rc_t
 475 efx_nic_init(
 476         __in            efx_nic_t *enp)
 477 {
 478         const efx_nic_ops_t *enop = enp->en_enop;
 479         efx_rc_t rc;
 480
 481         EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
 482         EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_PROBE);
 483
 484         if (enp->en_mod_flags & EFX_MOD_NIC) {
 485                 rc = EINVAL;
 486                 goto fail1;
 487         }
 488
 489         if ((rc = enop->eno_init(enp)) != 0)
 490                 goto fail2;
 491
 492         enp->en_mod_flags |= EFX_MOD_NIC;
 493
 494         return (0);
 495
 496 fail2:
 497         EFSYS_PROBE(fail2);
 498 fail1:
 499         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 500
 501         return (rc);
 502 }
 503
 504                         void
 505 efx_nic_fini(
 506         __in            efx_nic_t *enp)
 507 {
 508         const efx_nic_ops_t *enop = enp->en_enop;
 509
 510         EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
 511         EFSYS_ASSERT(enp->en_mod_flags & EFX_MOD_PROBE);
 512         EFSYS_ASSERT(enp->en_mod_flags & EFX_MOD_NIC);
 513         EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_INTR));
 514         EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_EV));
 515         EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_RX));
 516         EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_TX));
 517
 518         enop->eno_fini(enp);
 519
 520         enp->en_mod_flags &= ~EFX_MOD_NIC;
 521 }
 522
 523                         void
 524 efx_nic_unprobe(
 525         __in            efx_nic_t *enp)
 526 {
 527         const efx_nic_ops_t *enop = enp->en_enop;
 528
 529         EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
 530 #if EFSYS_OPT_MCDI
 531         EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_MCDI);
 532 #endif  /* EFSYS_OPT_MCDI */
 533         EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_PROBE);
 534         EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_NIC));
 535         EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_INTR));
 536         EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_EV));
 537         EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_RX));
 538         EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_TX));
 539
 540         efx_phy_unprobe(enp);
 541
 542         enop->eno_unprobe(enp);
 543
 544         enp->en_mod_flags &= ~EFX_MOD_PROBE;
 545 }
 546
 547                         void
 548 efx_nic_destroy(
 549         __in    efx_nic_t *enp)
 550 {
 551         efsys_identifier_t *esip = enp->en_esip;
 552
 553         EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
 554         EFSYS_ASSERT3U(enp->en_mod_flags, ==, 0);
 555
 556         enp->en_family = EFX_FAMILY_INVALID;
 557         enp->en_esip = NULL;
 558         enp->en_esbp = NULL;
 559         enp->en_eslp = NULL;
 560
 561         enp->en_enop = NULL;
 562
 563         enp->en_magic = 0;
 564
 565         /* Free the NIC object */
 566         EFSYS_KMEM_FREE(esip, sizeof (efx_nic_t), enp);
 567 }
 568
 569         __checkReturn   efx_rc_t
 570 efx_nic_reset(
 571         __in            efx_nic_t *enp)
 572 {
 573         const efx_nic_ops_t *enop = enp->en_enop;
 574         unsigned int mod_flags;
 575         efx_rc_t rc;
 576
 577         EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
 578         EFSYS_ASSERT(enp->en_mod_flags & EFX_MOD_PROBE);
 579         /*
 580          * All modules except the MCDI, PROBE, NVRAM, VPD, MON
 581          * (which we do not reset here) must have been shut down or never
 582          * initialized.
 583          *
 584          * A rule of thumb here is: If the controller or MC reboots, is *any*
 585          * state lost. If it's lost and needs reapplying, then the module
 586          * *must* not be initialised during the reset.
 587          */
 588         mod_flags = enp->en_mod_flags;
 589         mod_flags &= ~(EFX_MOD_MCDI | EFX_MOD_PROBE | EFX_MOD_NVRAM |
 590                     EFX_MOD_VPD | EFX_MOD_MON);
 591         EFSYS_ASSERT3U(mod_flags, ==, 0);
 592         if (mod_flags != 0) {
 593                 rc = EINVAL;
 594                 goto fail1;
 595         }
 596
 597         if ((rc = enop->eno_reset(enp)) != 0)
 598                 goto fail2;
 599
 600         return (0);
 601
 602 fail2:
 603         EFSYS_PROBE(fail2);
 604 fail1:
 605         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 606
 607         return (rc);
 608 }
 609
 610                         const efx_nic_cfg_t *
 611 efx_nic_cfg_get(
 612         __in            efx_nic_t *enp)
 613 {
 614         EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
 615
 616         return (&(enp->en_nic_cfg));
 617 }
 618
 619 #if EFSYS_OPT_DIAG
 620
 621         __checkReturn   efx_rc_t
 622 efx_nic_register_test(
 623         __in            efx_nic_t *enp)
 624 {
 625         const efx_nic_ops_t *enop = enp->en_enop;
 626         efx_rc_t rc;
 627
 628         EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
 629         EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_PROBE);
 630         EFSYS_ASSERT(!(enp->en_mod_flags & EFX_MOD_NIC));
 631
 632         if ((rc = enop->eno_register_test(enp)) != 0)
 633                 goto fail1;
 634
 635         return (0);
 636
 637 fail1:
 638         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 639
 640         return (rc);
 641 }
 642
 643         __checkReturn   efx_rc_t
 644 efx_nic_test_registers(
 645         __in            efx_nic_t *enp,
 646         __in            efx_register_set_t *rsp,
 647         __in            size_t count)
 648 {
 649         unsigned int bit;
 650         efx_oword_t original;
 651         efx_oword_t reg;
 652         efx_oword_t buf;
 653         efx_rc_t rc;
 654
 655         while (count > 0) {
 656                 /* This function is only suitable for registers */
 657                 EFSYS_ASSERT(rsp->rows == 1);
 658
 659                 /* bit sweep on and off */
 660                 EFSYS_BAR_READO(enp->en_esbp, rsp->address, &original,
 661                             B_TRUE);
 662                 for (bit = 0; bit < 128; bit++) {
 663                         /* Is this bit in the mask? */
 664                         if (~(rsp->mask.eo_u32[bit >> 5]) & (1 << bit))
 665                                 continue;
 666
 667                         /* Test this bit can be set in isolation */
 668                         reg = original;
 669                         EFX_AND_OWORD(reg, rsp->mask);
 670                         EFX_SET_OWORD_BIT(reg, bit);
 671
 672                         EFSYS_BAR_WRITEO(enp->en_esbp, rsp->address, &reg,
 673                                     B_TRUE);
 674                         EFSYS_BAR_READO(enp->en_esbp, rsp->address, &buf,
 675                                     B_TRUE);
 676
 677                         EFX_AND_OWORD(buf, rsp->mask);
 678                         if (memcmp(&reg, &buf, sizeof (reg))) {
 679                                 rc = EIO;
 680                                 goto fail1;
 681                         }
 682
 683                         /* Test this bit can be cleared in isolation */
 684                         EFX_OR_OWORD(reg, rsp->mask);
 685                         EFX_CLEAR_OWORD_BIT(reg, bit);
 686
 687                         EFSYS_BAR_WRITEO(enp->en_esbp, rsp->address, &reg,
 688                                     B_TRUE);
 689                         EFSYS_BAR_READO(enp->en_esbp, rsp->address, &buf,
 690                                     B_TRUE);
 691
 692                         EFX_AND_OWORD(buf, rsp->mask);
 693                         if (memcmp(&reg, &buf, sizeof (reg))) {
 694                                 rc = EIO;
 695                                 goto fail2;
 696                         }
 697                 }
 698
 699                 /* Restore the old value */
 700                 EFSYS_BAR_WRITEO(enp->en_esbp, rsp->address, &original,
 701                             B_TRUE);
 702
 703                 --count;
 704                 ++rsp;
 705         }
 706
 707         return (0);
 708
 709 fail2:
 710         EFSYS_PROBE(fail2);
 711 fail1:
 712         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 713
 714         /* Restore the old value */
 715         EFSYS_BAR_WRITEO(enp->en_esbp, rsp->address, &original, B_TRUE);
 716
 717         return (rc);
 718 }
 719
 720         __checkReturn   efx_rc_t
 721 efx_nic_test_tables(
 722         __in            efx_nic_t *enp,
 723         __in            efx_register_set_t *rsp,
 724         __in            efx_pattern_type_t pattern,
 725         __in            size_t count)
 726 {
 727         efx_sram_pattern_fn_t func;
 728         unsigned int index;
 729         unsigned int address;
 730         efx_oword_t reg;
 731         efx_oword_t buf;
 732         efx_rc_t rc;
 733
 734         EFSYS_ASSERT(pattern < EFX_PATTERN_NTYPES);
 735         func = __efx_sram_pattern_fns[pattern];
 736
 737         while (count > 0) {
 738                 /* Write */
 739                 address = rsp->address;
 740                 for (index = 0; index < rsp->rows; ++index) {
 741                         func(2 * index + 0, B_FALSE, &reg.eo_qword[0]);
 742                         func(2 * index + 1, B_FALSE, &reg.eo_qword[1]);
 743                         EFX_AND_OWORD(reg, rsp->mask);
 744                         EFSYS_BAR_WRITEO(enp->en_esbp, address, &reg, B_TRUE);
 745
 746                         address += rsp->step;
 747                 }
 748
 749                 /* Read */
 750                 address = rsp->address;
 751                 for (index = 0; index < rsp->rows; ++index) {
 752                         func(2 * index + 0, B_FALSE, &reg.eo_qword[0]);
 753                         func(2 * index + 1, B_FALSE, &reg.eo_qword[1]);
 754                         EFX_AND_OWORD(reg, rsp->mask);
 755                         EFSYS_BAR_READO(enp->en_esbp, address, &buf, B_TRUE);
 756                         if (memcmp(&reg, &buf, sizeof (reg))) {
 757                                 rc = EIO;
 758                                 goto fail1;
 759                         }
 760
 761                         address += rsp->step;
 762                 }
 763
 764                 ++rsp;
 765                 --count;
 766         }
 767
 768         return (0);
 769
 770 fail1:
 771         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 772
 773         return (rc);
 774 }
 775
 776 #endif  /* EFSYS_OPT_DIAG */
 777
 778 #if EFSYS_OPT_LOOPBACK
 779
 780 extern                  void
 781 efx_loopback_mask(
 782         __in    efx_loopback_kind_t loopback_kind,
 783         __out   efx_qword_t *maskp)
 784 {
 785         efx_qword_t mask;
 786
 787         EFSYS_ASSERT3U(loopback_kind, <, EFX_LOOPBACK_NKINDS);
 788         EFSYS_ASSERT(maskp != NULL);
 789
 790         /* Assert the MC_CMD_LOOPBACK and EFX_LOOPBACK namespace agree */
 791         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_NONE == EFX_LOOPBACK_OFF);
 792         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_DATA == EFX_LOOPBACK_DATA);
 793         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_GMAC == EFX_LOOPBACK_GMAC);
 794         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XGMII == EFX_LOOPBACK_XGMII);
 795         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XGXS == EFX_LOOPBACK_XGXS);
 796         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XAUI == EFX_LOOPBACK_XAUI);
 797         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_GMII == EFX_LOOPBACK_GMII);
 798         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_SGMII == EFX_LOOPBACK_SGMII);
 799         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XGBR == EFX_LOOPBACK_XGBR);
 800         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XFI == EFX_LOOPBACK_XFI);
 801         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XAUI_FAR == EFX_LOOPBACK_XAUI_FAR);
 802         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_GMII_FAR == EFX_LOOPBACK_GMII_FAR);
 803         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_SGMII_FAR == EFX_LOOPBACK_SGMII_FAR);
 804         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XFI_FAR == EFX_LOOPBACK_XFI_FAR);
 805         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_GPHY == EFX_LOOPBACK_GPHY);
 806         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_PHYXS == EFX_LOOPBACK_PHY_XS);
 807         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_PCS == EFX_LOOPBACK_PCS);
 808         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_PMAPMD == EFX_LOOPBACK_PMA_PMD);
 809         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XPORT == EFX_LOOPBACK_XPORT);
 810         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XGMII_WS == EFX_LOOPBACK_XGMII_WS);
 811         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XAUI_WS == EFX_LOOPBACK_XAUI_WS);
 812         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XAUI_WS_FAR ==
 813             EFX_LOOPBACK_XAUI_WS_FAR);
 814         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XAUI_WS_NEAR ==
 815             EFX_LOOPBACK_XAUI_WS_NEAR);
 816         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_GMII_WS == EFX_LOOPBACK_GMII_WS);
 817         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XFI_WS == EFX_LOOPBACK_XFI_WS);
 818         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_XFI_WS_FAR ==
 819             EFX_LOOPBACK_XFI_WS_FAR);
 820         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_PHYXS_WS == EFX_LOOPBACK_PHYXS_WS);
 821         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_PMA_INT == EFX_LOOPBACK_PMA_INT);
 822         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_SD_NEAR == EFX_LOOPBACK_SD_NEAR);
 823         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_SD_FAR == EFX_LOOPBACK_SD_FAR);
 824         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_PMA_INT_WS ==
 825             EFX_LOOPBACK_PMA_INT_WS);
 826         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_SD_FEP2_WS ==
 827             EFX_LOOPBACK_SD_FEP2_WS);
 828         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_SD_FEP1_5_WS ==
 829             EFX_LOOPBACK_SD_FEP1_5_WS);
 830         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_SD_FEP_WS == EFX_LOOPBACK_SD_FEP_WS);
 831         EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_SD_FES_WS == EFX_LOOPBACK_SD_FES_WS);
 832
 833         /* Build bitmask of possible loopback types */
 834         EFX_ZERO_QWORD(mask);
 835
 836         if ((loopback_kind == EFX_LOOPBACK_KIND_OFF) ||
 837             (loopback_kind == EFX_LOOPBACK_KIND_ALL)) {
 838                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_OFF);
 839         }
 840
 841         if ((loopback_kind == EFX_LOOPBACK_KIND_MAC) ||
 842             (loopback_kind == EFX_LOOPBACK_KIND_ALL)) {
 843                 /*
 844                  * The "MAC" grouping has historically been used by drivers to
 845                  * mean loopbacks supported by on-chip hardware. Keep that
 846                  * meaning here, and include on-chip PHY layer loopbacks.
 847                  */
 848                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_DATA);
 849                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_GMAC);
 850                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_XGMII);
 851                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_XGXS);
 852                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_XAUI);
 853                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_GMII);
 854                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_SGMII);
 855                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_XGBR);
 856                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_XFI);
 857                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_XAUI_FAR);
 858                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_GMII_FAR);
 859                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_SGMII_FAR);
 860                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_XFI_FAR);
 861                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_PMA_INT);
 862                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_SD_NEAR);
 863                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_SD_FAR);
 864         }
 865
 866         if ((loopback_kind == EFX_LOOPBACK_KIND_PHY) ||
 867             (loopback_kind == EFX_LOOPBACK_KIND_ALL)) {
 868                 /*
 869                  * The "PHY" grouping has historically been used by drivers to
 870                  * mean loopbacks supported by off-chip hardware. Keep that
 871                  * meaning here.
 872                  */
 873                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_GPHY);
 874                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_PHY_XS);
 875                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_PCS);
 876                 EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_PMA_PMD);
 877         }
 878
 879         *maskp = mask;
 880 }
 881
 882         __checkReturn   efx_rc_t
 883 efx_mcdi_get_loopback_modes(
 884         __in            efx_nic_t *enp)
 885 {
 886         efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
 887         efx_mcdi_req_t req;
 888         uint8_t payload[MAX(MC_CMD_GET_LOOPBACK_MODES_IN_LEN,
 889                             MC_CMD_GET_LOOPBACK_MODES_OUT_LEN)];
 890         efx_qword_t mask;
 891         efx_qword_t modes;
 892         efx_rc_t rc;
 893
 894         (void) memset(payload, 0, sizeof (payload));
 895         req.emr_cmd = MC_CMD_GET_LOOPBACK_MODES;
 896         req.emr_in_buf = payload;
 897         req.emr_in_length = MC_CMD_GET_LOOPBACK_MODES_IN_LEN;
 898         req.emr_out_buf = payload;
 899         req.emr_out_length = MC_CMD_GET_LOOPBACK_MODES_OUT_LEN;
 900
 901         efx_mcdi_execute(enp, &req);
 902
 903         if (req.emr_rc != 0) {
 904                 rc = req.emr_rc;
 905                 goto fail1;
 906         }
 907
 908         if (req.emr_out_length_used <
 909             MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_OFST +
 910             MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_LEN) {
 911                 rc = EMSGSIZE;
 912                 goto fail2;
 913         }
 914
 915         /*
 916          * We assert the MC_CMD_LOOPBACK and EFX_LOOPBACK namespaces agree
 917          * in efx_loopback_mask() and in siena_phy.c:siena_phy_get_link().
 918          */
 919         efx_loopback_mask(EFX_LOOPBACK_KIND_ALL, &mask);
 920
 921         EFX_AND_QWORD(mask,
 922             *MCDI_OUT2(req, efx_qword_t, GET_LOOPBACK_MODES_OUT_SUGGESTED));
 923
 924         modes = *MCDI_OUT2(req, efx_qword_t, GET_LOOPBACK_MODES_OUT_100M);
 925         EFX_AND_QWORD(modes, mask);
 926         encp->enc_loopback_types[EFX_LINK_100FDX] = modes;
 927
 928         modes = *MCDI_OUT2(req, efx_qword_t, GET_LOOPBACK_MODES_OUT_1G);
 929         EFX_AND_QWORD(modes, mask);
 930         encp->enc_loopback_types[EFX_LINK_1000FDX] = modes;
 931
 932         modes = *MCDI_OUT2(req, efx_qword_t, GET_LOOPBACK_MODES_OUT_10G);
 933         EFX_AND_QWORD(modes, mask);
 934         encp->enc_loopback_types[EFX_LINK_10000FDX] = modes;
 935
 936         if (req.emr_out_length_used >=
 937             MC_CMD_GET_LOOPBACK_MODES_OUT_40G_OFST +
 938             MC_CMD_GET_LOOPBACK_MODES_OUT_40G_LEN) {
 939                 /* Response includes 40G loopback modes */
 940                 modes =
 941                     *MCDI_OUT2(req, efx_qword_t, GET_LOOPBACK_MODES_OUT_40G);
 942                 EFX_AND_QWORD(modes, mask);
 943                 encp->enc_loopback_types[EFX_LINK_40000FDX] = modes;
 944         }
 945
 946         EFX_ZERO_QWORD(modes);
 947         EFX_SET_QWORD_BIT(modes, EFX_LOOPBACK_OFF);
 948         EFX_OR_QWORD(modes, encp->enc_loopback_types[EFX_LINK_100FDX]);
 949         EFX_OR_QWORD(modes, encp->enc_loopback_types[EFX_LINK_1000FDX]);
 950         EFX_OR_QWORD(modes, encp->enc_loopback_types[EFX_LINK_10000FDX]);
 951         EFX_OR_QWORD(modes, encp->enc_loopback_types[EFX_LINK_40000FDX]);
 952         encp->enc_loopback_types[EFX_LINK_UNKNOWN] = modes;
 953
 954         return (0);
 955
 956 fail2:
 957         EFSYS_PROBE(fail2);
 958 fail1:
 959         EFSYS_PROBE1(fail1, efx_rc_t, rc);
 960
 961         return (rc);
 962 }
 963
 964 #endif /* EFSYS_OPT_LOOPBACK */
 965
 966         __checkReturn   efx_rc_t
 967 efx_nic_calculate_pcie_link_bandwidth(
 968         __in            uint32_t pcie_link_width,
 969         __in            uint32_t pcie_link_gen,
 970         __out           uint32_t *bandwidth_mbpsp)
 971 {
 972         uint32_t lane_bandwidth;
 973         uint32_t total_bandwidth;
 974         efx_rc_t rc;
 975
 976         if ((pcie_link_width == 0) || (pcie_link_width > 16) ||
 977             !ISP2(pcie_link_width)) {
 978                 rc = EINVAL;
 979                 goto fail1;
 980         }
 981
 982         switch (pcie_link_gen) {
 983         case EFX_PCIE_LINK_SPEED_GEN1:
 984                 /* 2.5 Gb/s raw bandwidth with 8b/10b encoding */
 985                 lane_bandwidth = 2000;
 986                 break;
 987         case EFX_PCIE_LINK_SPEED_GEN2:
 988                 /* 5.0 Gb/s raw bandwidth with 8b/10b encoding */
 989                 lane_bandwidth = 4000;
 990                 break;
 991         case EFX_PCIE_LINK_SPEED_GEN3:
 992                 /* 8.0 Gb/s raw bandwidth with 128b/130b encoding */
 993                 lane_bandwidth = 7877;
 994                 break;
 995         default:
 996                 rc = EINVAL;
 997                 goto fail2;
 998         }
 999
1000         total_bandwidth = lane_bandwidth * pcie_link_width;
1001         *bandwidth_mbpsp = total_bandwidth;
1002
1003         return (0);
1004
1005 fail2:
1006         EFSYS_PROBE(fail2);
1007 fail1:
1008         EFSYS_PROBE1(fail1, efx_rc_t, rc);
1009
1010         return (rc);
1011 }
1012
1013
1014         __checkReturn   efx_rc_t
1015 efx_nic_check_pcie_link_speed(
1016         __in            efx_nic_t *enp,
1017         __in            uint32_t pcie_link_width,
1018         __in            uint32_t pcie_link_gen,
1019         __out           efx_pcie_link_performance_t *resultp)
1020 {
1021         efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
1022         uint32_t bandwidth;
1023         efx_pcie_link_performance_t result;
1024         efx_rc_t rc;
1025
1026         if ((encp->enc_required_pcie_bandwidth_mbps == 0) ||
1027             (pcie_link_width == 0) || (pcie_link_width == 32) ||
1028             (pcie_link_gen == 0)) {
1029                 /*
1030                  * No usable info on what is required and/or in use. In virtual
1031                  * machines, sometimes the PCIe link width is reported as 0 or
1032                  * 32, or the speed as 0.
1033                  */
1034                 result = EFX_PCIE_LINK_PERFORMANCE_UNKNOWN_BANDWIDTH;
1035                 goto out;
1036         }
1037
1038         /* Calculate the available bandwidth in megabits per second */
1039         rc = efx_nic_calculate_pcie_link_bandwidth(pcie_link_width,
1040                                             pcie_link_gen, &bandwidth);
1041         if (rc != 0)
1042                 goto fail1;
1043
1044         if (bandwidth < encp->enc_required_pcie_bandwidth_mbps) {
1045                 result = EFX_PCIE_LINK_PERFORMANCE_SUBOPTIMAL_BANDWIDTH;
1046         } else if (pcie_link_gen < encp->enc_max_pcie_link_gen) {
1047                 /* The link provides enough bandwidth but not optimal latency */
1048                 result = EFX_PCIE_LINK_PERFORMANCE_SUBOPTIMAL_LATENCY;
1049         } else {
1050                 result = EFX_PCIE_LINK_PERFORMANCE_OPTIMAL;
1051         }
1052
1053 out:
1054         *resultp = result;
1055
1056         return (0);
1057
1058 fail1:
1059         EFSYS_PROBE1(fail1, efx_rc_t, rc);
1060
1061         return (rc);
1062 }