drivers/net/ethernet/sfc/ef10_sriov.c

   1 /****************************************************************************
   2  * Driver for Solarflare network controllers and boards
   3  * Copyright 2015 Solarflare Communications Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published
   7  * by the Free Software Foundation, incorporated herein by reference.
   8  */
   9 #include <linux/etherdevice.h>
  10 #include <linux/pci.h>
  11 #include <linux/module.h>
  12 #include "net_driver.h"
  13 #include "ef10_sriov.h"
  14 #include "efx.h"
  15 #include "nic.h"
  16 #include "mcdi_pcol.h"
  17
  18 static int efx_ef10_evb_port_assign(struct efx_nic *efx, unsigned int port_id,
  19                                     unsigned int vf_fn)
  20 {
  21         MCDI_DECLARE_BUF(inbuf, MC_CMD_EVB_PORT_ASSIGN_IN_LEN);
  22         struct efx_ef10_nic_data *nic_data = efx->nic_data;
  23
  24         MCDI_SET_DWORD(inbuf, EVB_PORT_ASSIGN_IN_PORT_ID, port_id);
  25         MCDI_POPULATE_DWORD_2(inbuf, EVB_PORT_ASSIGN_IN_FUNCTION,
  26                               EVB_PORT_ASSIGN_IN_PF, nic_data->pf_index,
  27                               EVB_PORT_ASSIGN_IN_VF, vf_fn);
  28
  29         return efx_mcdi_rpc(efx, MC_CMD_EVB_PORT_ASSIGN, inbuf, sizeof(inbuf),
  30                             NULL, 0, NULL);
  31 }
  32
  33 static int efx_ef10_vswitch_alloc(struct efx_nic *efx, unsigned int port_id,
  34                                   unsigned int vswitch_type)
  35 {
  36         MCDI_DECLARE_BUF(inbuf, MC_CMD_VSWITCH_ALLOC_IN_LEN);
  37         int rc;
  38
  39         MCDI_SET_DWORD(inbuf, VSWITCH_ALLOC_IN_UPSTREAM_PORT_ID, port_id);
  40         MCDI_SET_DWORD(inbuf, VSWITCH_ALLOC_IN_TYPE, vswitch_type);
  41         MCDI_SET_DWORD(inbuf, VSWITCH_ALLOC_IN_NUM_VLAN_TAGS, 2);
  42         MCDI_POPULATE_DWORD_1(inbuf, VSWITCH_ALLOC_IN_FLAGS,
  43                               VSWITCH_ALLOC_IN_FLAG_AUTO_PORT, 0);
  44
  45         /* Quietly try to allocate 2 VLAN tags */
  46         rc = efx_mcdi_rpc_quiet(efx, MC_CMD_VSWITCH_ALLOC, inbuf, sizeof(inbuf),
  47                                 NULL, 0, NULL);
  48
  49         /* If 2 VLAN tags is too many, revert to trying with 1 VLAN tags */
  50         if (rc == -EPROTO) {
  51                 MCDI_SET_DWORD(inbuf, VSWITCH_ALLOC_IN_NUM_VLAN_TAGS, 1);
  52                 rc = efx_mcdi_rpc(efx, MC_CMD_VSWITCH_ALLOC, inbuf,
  53                                   sizeof(inbuf), NULL, 0, NULL);
  54         } else if (rc) {
  55                 efx_mcdi_display_error(efx, MC_CMD_VSWITCH_ALLOC,
  56                                        MC_CMD_VSWITCH_ALLOC_IN_LEN,
  57                                        NULL, 0, rc);
  58         }
  59         return rc;
  60 }
  61
  62 static int efx_ef10_vswitch_free(struct efx_nic *efx, unsigned int port_id)
  63 {
  64         MCDI_DECLARE_BUF(inbuf, MC_CMD_VSWITCH_FREE_IN_LEN);
  65
  66         MCDI_SET_DWORD(inbuf, VSWITCH_FREE_IN_UPSTREAM_PORT_ID, port_id);
  67
  68         return efx_mcdi_rpc(efx, MC_CMD_VSWITCH_FREE, inbuf, sizeof(inbuf),
  69                             NULL, 0, NULL);
  70 }
  71
  72 static int efx_ef10_vport_alloc(struct efx_nic *efx,
  73                                 unsigned int port_id_in,
  74                                 unsigned int vport_type,
  75                                 u16 vlan,
  76                                 unsigned int *port_id_out)
  77 {
  78         MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_ALLOC_IN_LEN);
  79         MCDI_DECLARE_BUF(outbuf, MC_CMD_VPORT_ALLOC_OUT_LEN);
  80         size_t outlen;
  81         int rc;
  82
  83         EFX_WARN_ON_PARANOID(!port_id_out);
  84
  85         MCDI_SET_DWORD(inbuf, VPORT_ALLOC_IN_UPSTREAM_PORT_ID, port_id_in);
  86         MCDI_SET_DWORD(inbuf, VPORT_ALLOC_IN_TYPE, vport_type);
  87         MCDI_SET_DWORD(inbuf, VPORT_ALLOC_IN_NUM_VLAN_TAGS,
  88                        (vlan != EFX_EF10_NO_VLAN));
  89         MCDI_POPULATE_DWORD_1(inbuf, VPORT_ALLOC_IN_FLAGS,
  90                               VPORT_ALLOC_IN_FLAG_AUTO_PORT, 0);
  91         if (vlan != EFX_EF10_NO_VLAN)
  92                 MCDI_POPULATE_DWORD_1(inbuf, VPORT_ALLOC_IN_VLAN_TAGS,
  93                                       VPORT_ALLOC_IN_VLAN_TAG_0, vlan);
  94
  95         rc = efx_mcdi_rpc(efx, MC_CMD_VPORT_ALLOC, inbuf, sizeof(inbuf),
  96                           outbuf, sizeof(outbuf), &outlen);
  97         if (rc)
  98                 return rc;
  99         if (outlen < MC_CMD_VPORT_ALLOC_OUT_LEN)
 100                 return -EIO;
 101
 102         *port_id_out = MCDI_DWORD(outbuf, VPORT_ALLOC_OUT_VPORT_ID);
 103         return 0;
 104 }
 105
 106 static int efx_ef10_vport_free(struct efx_nic *efx, unsigned int port_id)
 107 {
 108         MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_FREE_IN_LEN);
 109
 110         MCDI_SET_DWORD(inbuf, VPORT_FREE_IN_VPORT_ID, port_id);
 111
 112         return efx_mcdi_rpc(efx, MC_CMD_VPORT_FREE, inbuf, sizeof(inbuf),
 113                             NULL, 0, NULL);
 114 }
 115
 116 static void efx_ef10_sriov_free_vf_vports(struct efx_nic *efx)
 117 {
 118         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 119         int i;
 120
 121         if (!nic_data->vf)
 122                 return;
 123
 124         for (i = 0; i < efx->vf_count; i++) {
 125                 struct ef10_vf *vf = nic_data->vf + i;
 126
 127                 /* If VF is assigned, do not free the vport  */
 128                 if (vf->pci_dev &&
 129                     vf->pci_dev->dev_flags & PCI_DEV_FLAGS_ASSIGNED)
 130                         continue;
 131
 132                 if (vf->vport_assigned) {
 133                         efx_ef10_evb_port_assign(efx, EVB_PORT_ID_NULL, i);
 134                         vf->vport_assigned = 0;
 135                 }
 136
 137                 if (!is_zero_ether_addr(vf->mac)) {
 138                         efx_ef10_vport_del_mac(efx, vf->vport_id, vf->mac);
 139                         eth_zero_addr(vf->mac);
 140                 }
 141
 142                 if (vf->vport_id) {
 143                         efx_ef10_vport_free(efx, vf->vport_id);
 144                         vf->vport_id = 0;
 145                 }
 146
 147                 vf->efx = NULL;
 148         }
 149 }
 150
 151 static void efx_ef10_sriov_free_vf_vswitching(struct efx_nic *efx)
 152 {
 153         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 154
 155         efx_ef10_sriov_free_vf_vports(efx);
 156         kfree(nic_data->vf);
 157         nic_data->vf = NULL;
 158 }
 159
 160 static int efx_ef10_sriov_assign_vf_vport(struct efx_nic *efx,
 161                                           unsigned int vf_i)
 162 {
 163         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 164         struct ef10_vf *vf = nic_data->vf + vf_i;
 165         int rc;
 166
 167         if (WARN_ON_ONCE(!nic_data->vf))
 168                 return -EOPNOTSUPP;
 169
 170         rc = efx_ef10_vport_alloc(efx, EVB_PORT_ID_ASSIGNED,
 171                                   MC_CMD_VPORT_ALLOC_IN_VPORT_TYPE_NORMAL,
 172                                   vf->vlan, &vf->vport_id);
 173         if (rc)
 174                 return rc;
 175
 176         rc = efx_ef10_vport_add_mac(efx, vf->vport_id, vf->mac);
 177         if (rc) {
 178                 eth_zero_addr(vf->mac);
 179                 return rc;
 180         }
 181
 182         rc =  efx_ef10_evb_port_assign(efx, vf->vport_id, vf_i);
 183         if (rc)
 184                 return rc;
 185
 186         vf->vport_assigned = 1;
 187         return 0;
 188 }
 189
 190 static int efx_ef10_sriov_alloc_vf_vswitching(struct efx_nic *efx)
 191 {
 192         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 193         unsigned int i;
 194         int rc;
 195
 196         nic_data->vf = kcalloc(efx->vf_count, sizeof(struct ef10_vf),
 197                                GFP_KERNEL);
 198         if (!nic_data->vf)
 199                 return -ENOMEM;
 200
 201         for (i = 0; i < efx->vf_count; i++) {
 202                 random_ether_addr(nic_data->vf[i].mac);
 203                 nic_data->vf[i].efx = NULL;
 204                 nic_data->vf[i].vlan = EFX_EF10_NO_VLAN;
 205
 206                 rc = efx_ef10_sriov_assign_vf_vport(efx, i);
 207                 if (rc)
 208                         goto fail;
 209         }
 210
 211         return 0;
 212 fail:
 213         efx_ef10_sriov_free_vf_vports(efx);
 214         kfree(nic_data->vf);
 215         nic_data->vf = NULL;
 216         return rc;
 217 }
 218
 219 static int efx_ef10_sriov_restore_vf_vswitching(struct efx_nic *efx)
 220 {
 221         unsigned int i;
 222         int rc;
 223
 224         for (i = 0; i < efx->vf_count; i++) {
 225                 rc = efx_ef10_sriov_assign_vf_vport(efx, i);
 226                 if (rc)
 227                         goto fail;
 228         }
 229
 230         return 0;
 231 fail:
 232         efx_ef10_sriov_free_vf_vswitching(efx);
 233         return rc;
 234 }
 235
 236 static int efx_ef10_vadaptor_alloc_set_features(struct efx_nic *efx)
 237 {
 238         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 239         u32 port_flags;
 240         int rc;
 241
 242         rc = efx_ef10_vadaptor_alloc(efx, nic_data->vport_id);
 243         if (rc)
 244                 goto fail_vadaptor_alloc;
 245
 246         rc = efx_ef10_vadaptor_query(efx, nic_data->vport_id,
 247                                      &port_flags, NULL, NULL);
 248         if (rc)
 249                 goto fail_vadaptor_query;
 250
 251         if (port_flags &
 252             (1 << MC_CMD_VPORT_ALLOC_IN_FLAG_VLAN_RESTRICT_LBN))
 253                 efx->fixed_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 254         else
 255                 efx->fixed_features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
 256
 257         return 0;
 258
 259 fail_vadaptor_query:
 260         efx_ef10_vadaptor_free(efx, EVB_PORT_ID_ASSIGNED);
 261 fail_vadaptor_alloc:
 262         return rc;
 263 }
 264
 265 /* On top of the default firmware vswitch setup, create a VEB vswitch and
 266  * expansion vport for use by this function.
 267  */
 268 int efx_ef10_vswitching_probe_pf(struct efx_nic *efx)
 269 {
 270         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 271         struct net_device *net_dev = efx->net_dev;
 272         int rc;
 273
 274         if (pci_sriov_get_totalvfs(efx->pci_dev) <= 0) {
 275                 /* vswitch not needed as we have no VFs */
 276                 efx_ef10_vadaptor_alloc_set_features(efx);
 277                 return 0;
 278         }
 279
 280         rc = efx_ef10_vswitch_alloc(efx, EVB_PORT_ID_ASSIGNED,
 281                                     MC_CMD_VSWITCH_ALLOC_IN_VSWITCH_TYPE_VEB);
 282         if (rc)
 283                 goto fail1;
 284
 285         rc = efx_ef10_vport_alloc(efx, EVB_PORT_ID_ASSIGNED,
 286                                   MC_CMD_VPORT_ALLOC_IN_VPORT_TYPE_NORMAL,
 287                                   EFX_EF10_NO_VLAN, &nic_data->vport_id);
 288         if (rc)
 289                 goto fail2;
 290
 291         rc = efx_ef10_vport_add_mac(efx, nic_data->vport_id, net_dev->dev_addr);
 292         if (rc)
 293                 goto fail3;
 294         ether_addr_copy(nic_data->vport_mac, net_dev->dev_addr);
 295
 296         rc = efx_ef10_vadaptor_alloc_set_features(efx);
 297         if (rc)
 298                 goto fail4;
 299
 300         return 0;
 301 fail4:
 302         efx_ef10_vport_del_mac(efx, nic_data->vport_id, nic_data->vport_mac);
 303         eth_zero_addr(nic_data->vport_mac);
 304 fail3:
 305         efx_ef10_vport_free(efx, nic_data->vport_id);
 306         nic_data->vport_id = EVB_PORT_ID_ASSIGNED;
 307 fail2:
 308         efx_ef10_vswitch_free(efx, EVB_PORT_ID_ASSIGNED);
 309 fail1:
 310         return rc;
 311 }
 312
 313 int efx_ef10_vswitching_probe_vf(struct efx_nic *efx)
 314 {
 315         return efx_ef10_vadaptor_alloc_set_features(efx);
 316 }
 317
 318 int efx_ef10_vswitching_restore_pf(struct efx_nic *efx)
 319 {
 320         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 321         int rc;
 322
 323         if (!nic_data->must_probe_vswitching)
 324                 return 0;
 325
 326         rc = efx_ef10_vswitching_probe_pf(efx);
 327         if (rc)
 328                 goto fail;
 329
 330         rc = efx_ef10_sriov_restore_vf_vswitching(efx);
 331         if (rc)
 332                 goto fail;
 333
 334         nic_data->must_probe_vswitching = false;
 335 fail:
 336         return rc;
 337 }
 338
 339 int efx_ef10_vswitching_restore_vf(struct efx_nic *efx)
 340 {
 341         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 342         int rc;
 343
 344         if (!nic_data->must_probe_vswitching)
 345                 return 0;
 346
 347         rc = efx_ef10_vadaptor_free(efx, EVB_PORT_ID_ASSIGNED);
 348         if (rc)
 349                 return rc;
 350
 351         nic_data->must_probe_vswitching = false;
 352         return 0;
 353 }
 354
 355 void efx_ef10_vswitching_remove_pf(struct efx_nic *efx)
 356 {
 357         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 358
 359         efx_ef10_sriov_free_vf_vswitching(efx);
 360
 361         efx_ef10_vadaptor_free(efx, nic_data->vport_id);
 362
 363         if (nic_data->vport_id == EVB_PORT_ID_ASSIGNED)
 364                 return; /* No vswitch was ever created */
 365
 366         if (!is_zero_ether_addr(nic_data->vport_mac)) {
 367                 efx_ef10_vport_del_mac(efx, nic_data->vport_id,
 368                                        efx->net_dev->dev_addr);
 369                 eth_zero_addr(nic_data->vport_mac);
 370         }
 371         efx_ef10_vport_free(efx, nic_data->vport_id);
 372         nic_data->vport_id = EVB_PORT_ID_ASSIGNED;
 373
 374         /* Only free the vswitch if no VFs are assigned */
 375         if (!pci_vfs_assigned(efx->pci_dev))
 376                 efx_ef10_vswitch_free(efx, nic_data->vport_id);
 377 }
 378
 379 void efx_ef10_vswitching_remove_vf(struct efx_nic *efx)
 380 {
 381         efx_ef10_vadaptor_free(efx, EVB_PORT_ID_ASSIGNED);
 382 }
 383
 384 static int efx_ef10_pci_sriov_enable(struct efx_nic *efx, int num_vfs)
 385 {
 386         int rc = 0;
 387         struct pci_dev *dev = efx->pci_dev;
 388
 389         efx->vf_count = num_vfs;
 390
 391         rc = efx_ef10_sriov_alloc_vf_vswitching(efx);
 392         if (rc)
 393                 goto fail1;
 394
 395         rc = pci_enable_sriov(dev, num_vfs);
 396         if (rc)
 397                 goto fail2;
 398
 399         return 0;
 400 fail2:
 401         efx_ef10_sriov_free_vf_vswitching(efx);
 402 fail1:
 403         efx->vf_count = 0;
 404         netif_err(efx, probe, efx->net_dev,
 405                   "Failed to enable SRIOV VFs\n");
 406         return rc;
 407 }
 408
 409 static int efx_ef10_pci_sriov_disable(struct efx_nic *efx, bool force)
 410 {
 411         struct pci_dev *dev = efx->pci_dev;
 412         unsigned int vfs_assigned = 0;
 413
 414         vfs_assigned = pci_vfs_assigned(dev);
 415
 416         if (vfs_assigned && !force) {
 417                 netif_info(efx, drv, efx->net_dev, "VFs are assigned to guests; "
 418                            "please detach them before disabling SR-IOV\n");
 419                 return -EBUSY;
 420         }
 421
 422         if (!vfs_assigned)
 423                 pci_disable_sriov(dev);
 424
 425         efx_ef10_sriov_free_vf_vswitching(efx);
 426         efx->vf_count = 0;
 427         return 0;
 428 }
 429
 430 int efx_ef10_sriov_configure(struct efx_nic *efx, int num_vfs)
 431 {
 432         if (num_vfs == 0)
 433                 return efx_ef10_pci_sriov_disable(efx, false);
 434         else
 435                 return efx_ef10_pci_sriov_enable(efx, num_vfs);
 436 }
 437
 438 int efx_ef10_sriov_init(struct efx_nic *efx)
 439 {
 440         return 0;
 441 }
 442
 443 void efx_ef10_sriov_fini(struct efx_nic *efx)
 444 {
 445         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 446         unsigned int i;
 447         int rc;
 448
 449         if (!nic_data->vf) {
 450                 /* Remove any un-assigned orphaned VFs */
 451                 if (pci_num_vf(efx->pci_dev) && !pci_vfs_assigned(efx->pci_dev))
 452                         pci_disable_sriov(efx->pci_dev);
 453                 return;
 454         }
 455
 456         /* Remove any VFs in the host */
 457         for (i = 0; i < efx->vf_count; ++i) {
 458                 struct efx_nic *vf_efx = nic_data->vf[i].efx;
 459
 460                 if (vf_efx)
 461                         vf_efx->pci_dev->driver->remove(vf_efx->pci_dev);
 462         }
 463
 464         rc = efx_ef10_pci_sriov_disable(efx, true);
 465         if (rc)
 466                 netif_dbg(efx, drv, efx->net_dev,
 467                           "Disabling SRIOV was not successful rc=%d\n", rc);
 468         else
 469                 netif_dbg(efx, drv, efx->net_dev, "SRIOV disabled\n");
 470 }
 471
 472 static int efx_ef10_vport_del_vf_mac(struct efx_nic *efx, unsigned int port_id,
 473                                      u8 *mac)
 474 {
 475         MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_DEL_MAC_ADDRESS_IN_LEN);
 476         MCDI_DECLARE_BUF_ERR(outbuf);
 477         size_t outlen;
 478         int rc;
 479
 480         MCDI_SET_DWORD(inbuf, VPORT_DEL_MAC_ADDRESS_IN_VPORT_ID, port_id);
 481         ether_addr_copy(MCDI_PTR(inbuf, VPORT_DEL_MAC_ADDRESS_IN_MACADDR), mac);
 482
 483         rc = efx_mcdi_rpc(efx, MC_CMD_VPORT_DEL_MAC_ADDRESS, inbuf,
 484                           sizeof(inbuf), outbuf, sizeof(outbuf), &outlen);
 485
 486         return rc;
 487 }
 488
 489 int efx_ef10_sriov_set_vf_mac(struct efx_nic *efx, int vf_i, u8 *mac)
 490 {
 491         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 492         struct ef10_vf *vf;
 493         int rc;
 494
 495         if (!nic_data->vf)
 496                 return -EOPNOTSUPP;
 497
 498         if (vf_i >= efx->vf_count)
 499                 return -EINVAL;
 500         vf = nic_data->vf + vf_i;
 501
 502         if (vf->efx) {
 503                 efx_device_detach_sync(vf->efx);
 504                 efx_net_stop(vf->efx->net_dev);
 505
 506                 down_write(&vf->efx->filter_sem);
 507                 vf->efx->type->filter_table_remove(vf->efx);
 508
 509                 rc = efx_ef10_vadaptor_free(vf->efx, EVB_PORT_ID_ASSIGNED);
 510                 if (rc) {
 511                         up_write(&vf->efx->filter_sem);
 512                         return rc;
 513                 }
 514         }
 515
 516         rc = efx_ef10_evb_port_assign(efx, EVB_PORT_ID_NULL, vf_i);
 517         if (rc)
 518                 return rc;
 519
 520         if (!is_zero_ether_addr(vf->mac)) {
 521                 rc = efx_ef10_vport_del_vf_mac(efx, vf->vport_id, vf->mac);
 522                 if (rc)
 523                         return rc;
 524         }
 525
 526         if (!is_zero_ether_addr(mac)) {
 527                 rc = efx_ef10_vport_add_mac(efx, vf->vport_id, mac);
 528                 if (rc) {
 529                         eth_zero_addr(vf->mac);
 530                         goto fail;
 531                 }
 532                 if (vf->efx)
 533                         ether_addr_copy(vf->efx->net_dev->dev_addr, mac);
 534         }
 535
 536         ether_addr_copy(vf->mac, mac);
 537
 538         rc = efx_ef10_evb_port_assign(efx, vf->vport_id, vf_i);
 539         if (rc)
 540                 goto fail;
 541
 542         if (vf->efx) {
 543                 /* VF cannot use the vport_id that the PF created */
 544                 rc = efx_ef10_vadaptor_alloc(vf->efx, EVB_PORT_ID_ASSIGNED);
 545                 if (rc) {
 546                         up_write(&vf->efx->filter_sem);
 547                         return rc;
 548                 }
 549                 vf->efx->type->filter_table_probe(vf->efx);
 550                 up_write(&vf->efx->filter_sem);
 551                 efx_net_open(vf->efx->net_dev);
 552                 efx_device_attach_if_not_resetting(vf->efx);
 553         }
 554
 555         return 0;
 556
 557 fail:
 558         eth_zero_addr(vf->mac);
 559         return rc;
 560 }
 561
 562 int efx_ef10_sriov_set_vf_vlan(struct efx_nic *efx, int vf_i, u16 vlan,
 563                                u8 qos)
 564 {
 565         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 566         struct ef10_vf *vf;
 567         u16 old_vlan, new_vlan;
 568         int rc = 0, rc2 = 0;
 569
 570         if (vf_i >= efx->vf_count)
 571                 return -EINVAL;
 572         if (qos != 0)
 573                 return -EINVAL;
 574
 575         vf = nic_data->vf + vf_i;
 576
 577         new_vlan = (vlan == 0) ? EFX_EF10_NO_VLAN : vlan;
 578         if (new_vlan == vf->vlan)
 579                 return 0;
 580
 581         if (vf->efx) {
 582                 efx_device_detach_sync(vf->efx);
 583                 efx_net_stop(vf->efx->net_dev);
 584
 585                 mutex_lock(&vf->efx->mac_lock);
 586                 down_write(&vf->efx->filter_sem);
 587                 vf->efx->type->filter_table_remove(vf->efx);
 588
 589                 rc = efx_ef10_vadaptor_free(vf->efx, EVB_PORT_ID_ASSIGNED);
 590                 if (rc)
 591                         goto restore_filters;
 592         }
 593
 594         if (vf->vport_assigned) {
 595                 rc = efx_ef10_evb_port_assign(efx, EVB_PORT_ID_NULL, vf_i);
 596                 if (rc) {
 597                         netif_warn(efx, drv, efx->net_dev,
 598                                    "Failed to change vlan on VF %d.\n", vf_i);
 599                         netif_warn(efx, drv, efx->net_dev,
 600                                    "This is likely because the VF is bound to a driver in a VM.\n");
 601                         netif_warn(efx, drv, efx->net_dev,
 602                                    "Please unload the driver in the VM.\n");
 603                         goto restore_vadaptor;
 604                 }
 605                 vf->vport_assigned = 0;
 606         }
 607
 608         if (!is_zero_ether_addr(vf->mac)) {
 609                 rc = efx_ef10_vport_del_mac(efx, vf->vport_id, vf->mac);
 610                 if (rc)
 611                         goto restore_evb_port;
 612         }
 613
 614         if (vf->vport_id) {
 615                 rc = efx_ef10_vport_free(efx, vf->vport_id);
 616                 if (rc)
 617                         goto restore_mac;
 618                 vf->vport_id = 0;
 619         }
 620
 621         /* Do the actual vlan change */
 622         old_vlan = vf->vlan;
 623         vf->vlan = new_vlan;
 624
 625         /* Restore everything in reverse order */
 626         rc = efx_ef10_vport_alloc(efx, EVB_PORT_ID_ASSIGNED,
 627                                   MC_CMD_VPORT_ALLOC_IN_VPORT_TYPE_NORMAL,
 628                                   vf->vlan, &vf->vport_id);
 629         if (rc)
 630                 goto reset_nic_up_write;
 631
 632 restore_mac:
 633         if (!is_zero_ether_addr(vf->mac)) {
 634                 rc2 = efx_ef10_vport_add_mac(efx, vf->vport_id, vf->mac);
 635                 if (rc2) {
 636                         eth_zero_addr(vf->mac);
 637                         goto reset_nic_up_write;
 638                 }
 639         }
 640
 641 restore_evb_port:
 642         rc2 = efx_ef10_evb_port_assign(efx, vf->vport_id, vf_i);
 643         if (rc2)
 644                 goto reset_nic_up_write;
 645         else
 646                 vf->vport_assigned = 1;
 647
 648 restore_vadaptor:
 649         if (vf->efx) {
 650                 rc2 = efx_ef10_vadaptor_alloc(vf->efx, EVB_PORT_ID_ASSIGNED);
 651                 if (rc2)
 652                         goto reset_nic_up_write;
 653         }
 654
 655 restore_filters:
 656         if (vf->efx) {
 657                 rc2 = vf->efx->type->filter_table_probe(vf->efx);
 658                 if (rc2)
 659                         goto reset_nic_up_write;
 660
 661                 up_write(&vf->efx->filter_sem);
 662                 mutex_unlock(&vf->efx->mac_lock);
 663
 664                 rc2 = efx_net_open(vf->efx->net_dev);
 665                 if (rc2)
 666                         goto reset_nic;
 667
 668                 efx_device_attach_if_not_resetting(vf->efx);
 669         }
 670         return rc;
 671
 672 reset_nic_up_write:
 673         if (vf->efx) {
 674                 up_write(&vf->efx->filter_sem);
 675                 mutex_unlock(&vf->efx->mac_lock);
 676         }
 677 reset_nic:
 678         if (vf->efx) {
 679                 netif_err(efx, drv, efx->net_dev,
 680                           "Failed to restore VF - scheduling reset.\n");
 681                 efx_schedule_reset(vf->efx, RESET_TYPE_DATAPATH);
 682         } else {
 683                 netif_err(efx, drv, efx->net_dev,
 684                           "Failed to restore the VF and cannot reset the VF "
 685                           "- VF is not functional.\n");
 686                 netif_err(efx, drv, efx->net_dev,
 687                           "Please reload the driver attached to the VF.\n");
 688         }
 689
 690         return rc ? rc : rc2;
 691 }
 692
 693 int efx_ef10_sriov_set_vf_spoofchk(struct efx_nic *efx, int vf_i,
 694                                    bool spoofchk)
 695 {
 696         return spoofchk ? -EOPNOTSUPP : 0;
 697 }
 698
 699 int efx_ef10_sriov_set_vf_link_state(struct efx_nic *efx, int vf_i,
 700                                      int link_state)
 701 {
 702         MCDI_DECLARE_BUF(inbuf, MC_CMD_LINK_STATE_MODE_IN_LEN);
 703         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 704
 705         BUILD_BUG_ON(IFLA_VF_LINK_STATE_AUTO !=
 706                      MC_CMD_LINK_STATE_MODE_IN_LINK_STATE_AUTO);
 707         BUILD_BUG_ON(IFLA_VF_LINK_STATE_ENABLE !=
 708                      MC_CMD_LINK_STATE_MODE_IN_LINK_STATE_UP);
 709         BUILD_BUG_ON(IFLA_VF_LINK_STATE_DISABLE !=
 710                      MC_CMD_LINK_STATE_MODE_IN_LINK_STATE_DOWN);
 711         MCDI_POPULATE_DWORD_2(inbuf, LINK_STATE_MODE_IN_FUNCTION,
 712                               LINK_STATE_MODE_IN_FUNCTION_PF,
 713                               nic_data->pf_index,
 714                               LINK_STATE_MODE_IN_FUNCTION_VF, vf_i);
 715         MCDI_SET_DWORD(inbuf, LINK_STATE_MODE_IN_NEW_MODE, link_state);
 716         return efx_mcdi_rpc(efx, MC_CMD_LINK_STATE_MODE, inbuf, sizeof(inbuf),
 717                             NULL, 0, NULL); /* don't care what old mode was */
 718 }
 719
 720 int efx_ef10_sriov_get_vf_config(struct efx_nic *efx, int vf_i,
 721                                  struct ifla_vf_info *ivf)
 722 {
 723         MCDI_DECLARE_BUF(inbuf, MC_CMD_LINK_STATE_MODE_IN_LEN);
 724         MCDI_DECLARE_BUF(outbuf, MC_CMD_LINK_STATE_MODE_OUT_LEN);
 725
 726         struct efx_ef10_nic_data *nic_data = efx->nic_data;
 727         struct ef10_vf *vf;
 728         size_t outlen;
 729         int rc;
 730
 731         if (vf_i >= efx->vf_count)
 732                 return -EINVAL;
 733
 734         if (!nic_data->vf)
 735                 return -EOPNOTSUPP;
 736
 737         vf = nic_data->vf + vf_i;
 738
 739         ivf->vf = vf_i;
 740         ivf->min_tx_rate = 0;
 741         ivf->max_tx_rate = 0;
 742         ether_addr_copy(ivf->mac, vf->mac);
 743         ivf->vlan = (vf->vlan == EFX_EF10_NO_VLAN) ? 0 : vf->vlan;
 744         ivf->qos = 0;
 745
 746         MCDI_POPULATE_DWORD_2(inbuf, LINK_STATE_MODE_IN_FUNCTION,
 747                               LINK_STATE_MODE_IN_FUNCTION_PF,
 748                               nic_data->pf_index,
 749                               LINK_STATE_MODE_IN_FUNCTION_VF, vf_i);
 750         MCDI_SET_DWORD(inbuf, LINK_STATE_MODE_IN_NEW_MODE,
 751                        MC_CMD_LINK_STATE_MODE_IN_DO_NOT_CHANGE);
 752         rc = efx_mcdi_rpc(efx, MC_CMD_LINK_STATE_MODE, inbuf, sizeof(inbuf),
 753                           outbuf, sizeof(outbuf), &outlen);
 754         if (rc)
 755                 return rc;
 756         if (outlen < MC_CMD_LINK_STATE_MODE_OUT_LEN)
 757                 return -EIO;
 758         ivf->linkstate = MCDI_DWORD(outbuf, LINK_STATE_MODE_OUT_OLD_MODE);
 759
 760         return 0;
 761 }