root/drivers/net/ethernet/intel/fm10k/fm10k_iov.c

DEFINITIONS

1. fm10k_iov_msg_error
2. fm10k_iov_msg_queue_mac_vlan
3. fm10k_iov_event
4. fm10k_iov_mbx
5. fm10k_iov_suspend
6. fm10k_mask_aer_comp_abort
7. fm10k_iov_resume
8. fm10k_iov_update_pvid
9. fm10k_iov_free_data
10. fm10k_iov_alloc_data
11. fm10k_iov_disable
12. fm10k_iov_configure
13. fm10k_reset_vf_info
14. fm10k_ndo_set_vf_mac
15. fm10k_ndo_set_vf_vlan
16. fm10k_ndo_set_vf_bw
17. fm10k_ndo_get_vf_config

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2013 - 2019 Intel Corporation. */
   3 
   4 #include "fm10k.h"
   5 #include "fm10k_vf.h"
   6 #include "fm10k_pf.h"
   7 
   8 static s32 fm10k_iov_msg_error(struct fm10k_hw *hw, u32 **results,
   9                                struct fm10k_mbx_info *mbx)
  10 {
  11         struct fm10k_vf_info *vf_info = (struct fm10k_vf_info *)mbx;
  12         struct fm10k_intfc *interface = hw->back;
  13         struct pci_dev *pdev = interface->pdev;
  14 
  15         dev_err(&pdev->dev, "Unknown message ID %u on VF %d\n",
  16                 **results & FM10K_TLV_ID_MASK, vf_info->vf_idx);
  17 
  18         return fm10k_tlv_msg_error(hw, results, mbx);
  19 }
  20 
  21 /**
  22  *  fm10k_iov_msg_queue_mac_vlan - Message handler for MAC/VLAN request from VF
  23  *  @hw: Pointer to hardware structure
  24  *  @results: Pointer array to message, results[0] is pointer to message
  25  *  @mbx: Pointer to mailbox information structure
  26  *
  27  *  This function is a custom handler for MAC/VLAN requests from the VF. The
  28  *  assumption is that it is acceptable to directly hand off the message from
  29  *  the VF to the PF's switch manager. However, we use a MAC/VLAN message
  30  *  queue to avoid overloading the mailbox when a large number of requests
  31  *  come in.
  32  **/
  33 static s32 fm10k_iov_msg_queue_mac_vlan(struct fm10k_hw *hw, u32 **results,
  34                                         struct fm10k_mbx_info *mbx)
  35 {
  36         struct fm10k_vf_info *vf_info = (struct fm10k_vf_info *)mbx;
  37         struct fm10k_intfc *interface = hw->back;
  38         u8 mac[ETH_ALEN];
  39         u32 *result;
  40         int err = 0;
  41         bool set;
  42         u16 vlan;
  43         u32 vid;
  44 
  45         /* we shouldn't be updating rules on a disabled interface */
  46         if (!FM10K_VF_FLAG_ENABLED(vf_info))
  47                 err = FM10K_ERR_PARAM;
  48 
  49         if (!err && !!results[FM10K_MAC_VLAN_MSG_VLAN]) {
  50                 result = results[FM10K_MAC_VLAN_MSG_VLAN];
  51 
  52                 /* record VLAN id requested */
  53                 err = fm10k_tlv_attr_get_u32(result, &vid);
  54                 if (err)
  55                         return err;
  56 
  57                 set = !(vid & FM10K_VLAN_CLEAR);
  58                 vid &= ~FM10K_VLAN_CLEAR;
  59 
  60                 /* if the length field has been set, this is a multi-bit
  61                  * update request. For multi-bit requests, simply disallow
  62                  * them when the pf_vid has been set. In this case, the PF
  63                  * should have already cleared the VLAN_TABLE, and if we
  64                  * allowed them, it could allow a rogue VF to receive traffic
  65                  * on a VLAN it was not assigned. In the single-bit case, we
  66                  * need to modify requests for VLAN 0 to use the default PF or
  67                  * SW vid when assigned.
  68                  */
  69 
  70                 if (vid >> 16) {
  71                         /* prevent multi-bit requests when PF has
  72                          * administratively set the VLAN for this VF
  73                          */
  74                         if (vf_info->pf_vid)
  75                                 return FM10K_ERR_PARAM;
  76                 } else {
  77                         err = fm10k_iov_select_vid(vf_info, (u16)vid);
  78                         if (err < 0)
  79                                 return err;
  80 
  81                         vid = err;
  82                 }
  83 
  84                 /* update VSI info for VF in regards to VLAN table */
  85                 err = hw->mac.ops.update_vlan(hw, vid, vf_info->vsi, set);
  86         }
  87 
  88         if (!err && !!results[FM10K_MAC_VLAN_MSG_MAC]) {
  89                 result = results[FM10K_MAC_VLAN_MSG_MAC];
  90 
  91                 /* record unicast MAC address requested */
  92                 err = fm10k_tlv_attr_get_mac_vlan(result, mac, &vlan);
  93                 if (err)
  94                         return err;
  95 
  96                 /* block attempts to set MAC for a locked device */
  97                 if (is_valid_ether_addr(vf_info->mac) &&
  98                     !ether_addr_equal(mac, vf_info->mac))
  99                         return FM10K_ERR_PARAM;
 100 
 101                 set = !(vlan & FM10K_VLAN_CLEAR);
 102                 vlan &= ~FM10K_VLAN_CLEAR;
 103 
 104                 err = fm10k_iov_select_vid(vf_info, vlan);
 105                 if (err < 0)
 106                         return err;
 107 
 108                 vlan = (u16)err;
 109 
 110                 /* Add this request to the MAC/VLAN queue */
 111                 err = fm10k_queue_mac_request(interface, vf_info->glort,
 112                                               mac, vlan, set);
 113         }
 114 
 115         if (!err && !!results[FM10K_MAC_VLAN_MSG_MULTICAST]) {
 116                 result = results[FM10K_MAC_VLAN_MSG_MULTICAST];
 117 
 118                 /* record multicast MAC address requested */
 119                 err = fm10k_tlv_attr_get_mac_vlan(result, mac, &vlan);
 120                 if (err)
 121                         return err;
 122 
 123                 /* verify that the VF is allowed to request multicast */
 124                 if (!(vf_info->vf_flags & FM10K_VF_FLAG_MULTI_ENABLED))
 125                         return FM10K_ERR_PARAM;
 126 
 127                 set = !(vlan & FM10K_VLAN_CLEAR);
 128                 vlan &= ~FM10K_VLAN_CLEAR;
 129 
 130                 err = fm10k_iov_select_vid(vf_info, vlan);
 131                 if (err < 0)
 132                         return err;
 133 
 134                 vlan = (u16)err;
 135 
 136                 /* Add this request to the MAC/VLAN queue */
 137                 err = fm10k_queue_mac_request(interface, vf_info->glort,
 138                                               mac, vlan, set);
 139         }
 140 
 141         return err;
 142 }
 143 
 144 static const struct fm10k_msg_data iov_mbx_data[] = {
 145         FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
 146         FM10K_VF_MSG_MSIX_HANDLER(fm10k_iov_msg_msix_pf),
 147         FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_iov_msg_queue_mac_vlan),
 148         FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_iov_msg_lport_state_pf),
 149         FM10K_TLV_MSG_ERROR_HANDLER(fm10k_iov_msg_error),
 150 };
 151 
 152 s32 fm10k_iov_event(struct fm10k_intfc *interface)
 153 {
 154         struct fm10k_hw *hw = &interface->hw;
 155         struct fm10k_iov_data *iov_data;
 156         s64 vflre;
 157         int i;
 158 
 159         /* if there is no iov_data then there is no mailbox to process */
 160         if (!READ_ONCE(interface->iov_data))
 161                 return 0;
 162 
 163         rcu_read_lock();
 164 
 165         iov_data = interface->iov_data;
 166 
 167         /* check again now that we are in the RCU block */
 168         if (!iov_data)
 169                 goto read_unlock;
 170 
 171         if (!(fm10k_read_reg(hw, FM10K_EICR) & FM10K_EICR_VFLR))
 172                 goto read_unlock;
 173 
 174         /* read VFLRE to determine if any VFs have been reset */
 175         vflre = fm10k_read_reg(hw, FM10K_PFVFLRE(1));
 176         vflre <<= 32;
 177         vflre |= fm10k_read_reg(hw, FM10K_PFVFLRE(0));
 178 
 179         i = iov_data->num_vfs;
 180 
 181         for (vflre <<= 64 - i; vflre && i--; vflre += vflre) {
 182                 struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
 183 
 184                 if (vflre >= 0)
 185                         continue;
 186 
 187                 hw->iov.ops.reset_resources(hw, vf_info);
 188                 vf_info->mbx.ops.connect(hw, &vf_info->mbx);
 189         }
 190 
 191 read_unlock:
 192         rcu_read_unlock();
 193 
 194         return 0;
 195 }
 196 
 197 s32 fm10k_iov_mbx(struct fm10k_intfc *interface)
 198 {
 199         struct fm10k_hw *hw = &interface->hw;
 200         struct fm10k_iov_data *iov_data;
 201         int i;
 202 
 203         /* if there is no iov_data then there is no mailbox to process */
 204         if (!READ_ONCE(interface->iov_data))
 205                 return 0;
 206 
 207         rcu_read_lock();
 208 
 209         iov_data = interface->iov_data;
 210 
 211         /* check again now that we are in the RCU block */
 212         if (!iov_data)
 213                 goto read_unlock;
 214 
 215         /* lock the mailbox for transmit and receive */
 216         fm10k_mbx_lock(interface);
 217 
 218         /* Most VF messages sent to the PF cause the PF to respond by
 219          * requesting from the SM mailbox. This means that too many VF
 220          * messages processed at once could cause a mailbox timeout on the PF.
 221          * To prevent this, store a pointer to the next VF mbx to process. Use
 222          * that as the start of the loop so that we don't starve whichever VF
 223          * got ignored on the previous run.
 224          */
 225 process_mbx:
 226         for (i = iov_data->next_vf_mbx ? : iov_data->num_vfs; i--;) {
 227                 struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
 228                 struct fm10k_mbx_info *mbx = &vf_info->mbx;
 229                 u16 glort = vf_info->glort;
 230 
 231                 /* process the SM mailbox first to drain outgoing messages */
 232                 hw->mbx.ops.process(hw, &hw->mbx);
 233 
 234                 /* verify port mapping is valid, if not reset port */
 235                 if (vf_info->vf_flags && !fm10k_glort_valid_pf(hw, glort)) {
 236                         hw->iov.ops.reset_lport(hw, vf_info);
 237                         fm10k_clear_macvlan_queue(interface, glort, false);
 238                 }
 239 
 240                 /* reset VFs that have mailbox timed out */
 241                 if (!mbx->timeout) {
 242                         hw->iov.ops.reset_resources(hw, vf_info);
 243                         mbx->ops.connect(hw, mbx);
 244                 }
 245 
 246                 /* guarantee we have free space in the SM mailbox */
 247                 if (hw->mbx.state == FM10K_STATE_OPEN &&
 248                     !hw->mbx.ops.tx_ready(&hw->mbx, FM10K_VFMBX_MSG_MTU)) {
 249                         /* keep track of how many times this occurs */
 250                         interface->hw_sm_mbx_full++;
 251 
 252                         /* make sure we try again momentarily */
 253                         fm10k_service_event_schedule(interface);
 254 
 255                         break;
 256                 }
 257 
 258                 /* cleanup mailbox and process received messages */
 259                 mbx->ops.process(hw, mbx);
 260         }
 261 
 262         /* if we stopped processing mailboxes early, update next_vf_mbx.
 263          * Otherwise, reset next_vf_mbx, and restart loop so that we process
 264          * the remaining mailboxes we skipped at the start.
 265          */
 266         if (i >= 0) {
 267                 iov_data->next_vf_mbx = i + 1;
 268         } else if (iov_data->next_vf_mbx) {
 269                 iov_data->next_vf_mbx = 0;
 270                 goto process_mbx;
 271         }
 272 
 273         /* free the lock */
 274         fm10k_mbx_unlock(interface);
 275 
 276 read_unlock:
 277         rcu_read_unlock();
 278 
 279         return 0;
 280 }
 281 
 282 void fm10k_iov_suspend(struct pci_dev *pdev)
 283 {
 284         struct fm10k_intfc *interface = pci_get_drvdata(pdev);
 285         struct fm10k_iov_data *iov_data = interface->iov_data;
 286         struct fm10k_hw *hw = &interface->hw;
 287         int num_vfs, i;
 288 
 289         /* pull out num_vfs from iov_data */
 290         num_vfs = iov_data ? iov_data->num_vfs : 0;
 291 
 292         /* shut down queue mapping for VFs */
 293         fm10k_write_reg(hw, FM10K_DGLORTMAP(fm10k_dglort_vf_rss),
 294                         FM10K_DGLORTMAP_NONE);
 295 
 296         /* Stop any active VFs and reset their resources */
 297         for (i = 0; i < num_vfs; i++) {
 298                 struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
 299 
 300                 hw->iov.ops.reset_resources(hw, vf_info);
 301                 hw->iov.ops.reset_lport(hw, vf_info);
 302                 fm10k_clear_macvlan_queue(interface, vf_info->glort, false);
 303         }
 304 }
 305 
 306 static void fm10k_mask_aer_comp_abort(struct pci_dev *pdev)
 307 {
 308         u32 err_mask;
 309         int pos;
 310 
 311         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
 312         if (!pos)
 313                 return;
 314 
 315         /* Mask the completion abort bit in the ERR_UNCOR_MASK register,
 316          * preventing the device from reporting these errors to the upstream
 317          * PCIe root device. This avoids bringing down platforms which upgrade
 318          * non-fatal completer aborts into machine check exceptions. Completer
 319          * aborts can occur whenever a VF reads a queue it doesn't own.
 320          */
 321         pci_read_config_dword(pdev, pos + PCI_ERR_UNCOR_MASK, &err_mask);
 322         err_mask |= PCI_ERR_UNC_COMP_ABORT;
 323         pci_write_config_dword(pdev, pos + PCI_ERR_UNCOR_MASK, err_mask);
 324 }
 325 
 326 int fm10k_iov_resume(struct pci_dev *pdev)
 327 {
 328         struct fm10k_intfc *interface = pci_get_drvdata(pdev);
 329         struct fm10k_iov_data *iov_data = interface->iov_data;
 330         struct fm10k_dglort_cfg dglort = { 0 };
 331         struct fm10k_hw *hw = &interface->hw;
 332         int num_vfs, i;
 333 
 334         /* pull out num_vfs from iov_data */
 335         num_vfs = iov_data ? iov_data->num_vfs : 0;
 336 
 337         /* return error if iov_data is not already populated */
 338         if (!iov_data)
 339                 return -ENOMEM;
 340 
 341         /* Lower severity of completer abort error reporting as
 342          * the VFs can trigger this any time they read a queue
 343          * that they don't own.
 344          */
 345         fm10k_mask_aer_comp_abort(pdev);
 346 
 347         /* allocate hardware resources for the VFs */
 348         hw->iov.ops.assign_resources(hw, num_vfs, num_vfs);
 349 
 350         /* configure DGLORT mapping for RSS */
 351         dglort.glort = hw->mac.dglort_map & FM10K_DGLORTMAP_NONE;
 352         dglort.idx = fm10k_dglort_vf_rss;
 353         dglort.inner_rss = 1;
 354         dglort.rss_l = fls(fm10k_queues_per_pool(hw) - 1);
 355         dglort.queue_b = fm10k_vf_queue_index(hw, 0);
 356         dglort.vsi_l = fls(hw->iov.total_vfs - 1);
 357         dglort.vsi_b = 1;
 358 
 359         hw->mac.ops.configure_dglort_map(hw, &dglort);
 360 
 361         /* assign resources to the device */
 362         for (i = 0; i < num_vfs; i++) {
 363                 struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
 364 
 365                 /* allocate all but the last GLORT to the VFs */
 366                 if (i == (~hw->mac.dglort_map >> FM10K_DGLORTMAP_MASK_SHIFT))
 367                         break;
 368 
 369                 /* assign GLORT to VF, and restrict it to multicast */
 370                 hw->iov.ops.set_lport(hw, vf_info, i,
 371                                       FM10K_VF_FLAG_MULTI_CAPABLE);
 372 
 373                 /* mailbox is disconnected so we don't send a message */
 374                 hw->iov.ops.assign_default_mac_vlan(hw, vf_info);
 375 
 376                 /* now we are ready so we can connect */
 377                 vf_info->mbx.ops.connect(hw, &vf_info->mbx);
 378         }
 379 
 380         return 0;
 381 }
 382 
 383 s32 fm10k_iov_update_pvid(struct fm10k_intfc *interface, u16 glort, u16 pvid)
 384 {
 385         struct fm10k_iov_data *iov_data = interface->iov_data;
 386         struct fm10k_hw *hw = &interface->hw;
 387         struct fm10k_vf_info *vf_info;
 388         u16 vf_idx = (glort - hw->mac.dglort_map) & FM10K_DGLORTMAP_NONE;
 389 
 390         /* no IOV support, not our message to process */
 391         if (!iov_data)
 392                 return FM10K_ERR_PARAM;
 393 
 394         /* glort outside our range, not our message to process */
 395         if (vf_idx >= iov_data->num_vfs)
 396                 return FM10K_ERR_PARAM;
 397 
 398         /* determine if an update has occurred and if so notify the VF */
 399         vf_info = &iov_data->vf_info[vf_idx];
 400         if (vf_info->sw_vid != pvid) {
 401                 vf_info->sw_vid = pvid;
 402                 hw->iov.ops.assign_default_mac_vlan(hw, vf_info);
 403         }
 404 
 405         return 0;
 406 }
 407 
 408 static void fm10k_iov_free_data(struct pci_dev *pdev)
 409 {
 410         struct fm10k_intfc *interface = pci_get_drvdata(pdev);
 411 
 412         if (!interface->iov_data)
 413                 return;
 414 
 415         /* reclaim hardware resources */
 416         fm10k_iov_suspend(pdev);
 417 
 418         /* drop iov_data from interface */
 419         kfree_rcu(interface->iov_data, rcu);
 420         interface->iov_data = NULL;
 421 }
 422 
 423 static s32 fm10k_iov_alloc_data(struct pci_dev *pdev, int num_vfs)
 424 {
 425         struct fm10k_intfc *interface = pci_get_drvdata(pdev);
 426         struct fm10k_iov_data *iov_data = interface->iov_data;
 427         struct fm10k_hw *hw = &interface->hw;
 428         size_t size;
 429         int i;
 430 
 431         /* return error if iov_data is already populated */
 432         if (iov_data)
 433                 return -EBUSY;
 434 
 435         /* The PF should always be able to assign resources */
 436         if (!hw->iov.ops.assign_resources)
 437                 return -ENODEV;
 438 
 439         /* nothing to do if no VFs are requested */
 440         if (!num_vfs)
 441                 return 0;
 442 
 443         /* allocate memory for VF storage */
 444         size = offsetof(struct fm10k_iov_data, vf_info[num_vfs]);
 445         iov_data = kzalloc(size, GFP_KERNEL);
 446         if (!iov_data)
 447                 return -ENOMEM;
 448 
 449         /* record number of VFs */
 450         iov_data->num_vfs = num_vfs;
 451 
 452         /* loop through vf_info structures initializing each entry */
 453         for (i = 0; i < num_vfs; i++) {
 454                 struct fm10k_vf_info *vf_info = &iov_data->vf_info[i];
 455                 int err;
 456 
 457                 /* Record VF VSI value */
 458                 vf_info->vsi = i + 1;
 459                 vf_info->vf_idx = i;
 460 
 461                 /* initialize mailbox memory */
 462                 err = fm10k_pfvf_mbx_init(hw, &vf_info->mbx, iov_mbx_data, i);
 463                 if (err) {
 464                         dev_err(&pdev->dev,
 465                                 "Unable to initialize SR-IOV mailbox\n");
 466                         kfree(iov_data);
 467                         return err;
 468                 }
 469         }
 470 
 471         /* assign iov_data to interface */
 472         interface->iov_data = iov_data;
 473 
 474         /* allocate hardware resources for the VFs */
 475         fm10k_iov_resume(pdev);
 476 
 477         return 0;
 478 }
 479 
 480 void fm10k_iov_disable(struct pci_dev *pdev)
 481 {
 482         if (pci_num_vf(pdev) && pci_vfs_assigned(pdev))
 483                 dev_err(&pdev->dev,
 484                         "Cannot disable SR-IOV while VFs are assigned\n");
 485         else
 486                 pci_disable_sriov(pdev);
 487 
 488         fm10k_iov_free_data(pdev);
 489 }
 490 
 491 int fm10k_iov_configure(struct pci_dev *pdev, int num_vfs)
 492 {
 493         int current_vfs = pci_num_vf(pdev);
 494         int err = 0;
 495 
 496         if (current_vfs && pci_vfs_assigned(pdev)) {
 497                 dev_err(&pdev->dev,
 498                         "Cannot modify SR-IOV while VFs are assigned\n");
 499                 num_vfs = current_vfs;
 500         } else {
 501                 pci_disable_sriov(pdev);
 502                 fm10k_iov_free_data(pdev);
 503         }
 504 
 505         /* allocate resources for the VFs */
 506         err = fm10k_iov_alloc_data(pdev, num_vfs);
 507         if (err)
 508                 return err;
 509 
 510         /* allocate VFs if not already allocated */
 511         if (num_vfs && num_vfs != current_vfs) {
 512                 err = pci_enable_sriov(pdev, num_vfs);
 513                 if (err) {
 514                         dev_err(&pdev->dev,
 515                                 "Enable PCI SR-IOV failed: %d\n", err);
 516                         return err;
 517                 }
 518         }
 519 
 520         return num_vfs;
 521 }
 522 
 523 static inline void fm10k_reset_vf_info(struct fm10k_intfc *interface,
 524                                        struct fm10k_vf_info *vf_info)
 525 {
 526         struct fm10k_hw *hw = &interface->hw;
 527 
 528         /* assigning the MAC address will send a mailbox message */
 529         fm10k_mbx_lock(interface);
 530 
 531         /* disable LPORT for this VF which clears switch rules */
 532         hw->iov.ops.reset_lport(hw, vf_info);
 533 
 534         fm10k_clear_macvlan_queue(interface, vf_info->glort, false);
 535 
 536         /* assign new MAC+VLAN for this VF */
 537         hw->iov.ops.assign_default_mac_vlan(hw, vf_info);
 538 
 539         /* re-enable the LPORT for this VF */
 540         hw->iov.ops.set_lport(hw, vf_info, vf_info->vf_idx,
 541                               FM10K_VF_FLAG_MULTI_CAPABLE);
 542 
 543         fm10k_mbx_unlock(interface);
 544 }
 545 
 546 int fm10k_ndo_set_vf_mac(struct net_device *netdev, int vf_idx, u8 *mac)
 547 {
 548         struct fm10k_intfc *interface = netdev_priv(netdev);
 549         struct fm10k_iov_data *iov_data = interface->iov_data;
 550         struct fm10k_vf_info *vf_info;
 551 
 552         /* verify SR-IOV is active and that vf idx is valid */
 553         if (!iov_data || vf_idx >= iov_data->num_vfs)
 554                 return -EINVAL;
 555 
 556         /* verify MAC addr is valid */
 557         if (!is_zero_ether_addr(mac) && !is_valid_ether_addr(mac))
 558                 return -EINVAL;
 559 
 560         /* record new MAC address */
 561         vf_info = &iov_data->vf_info[vf_idx];
 562         ether_addr_copy(vf_info->mac, mac);
 563 
 564         fm10k_reset_vf_info(interface, vf_info);
 565 
 566         return 0;
 567 }
 568 
 569 int fm10k_ndo_set_vf_vlan(struct net_device *netdev, int vf_idx, u16 vid,
 570                           u8 qos, __be16 vlan_proto)
 571 {
 572         struct fm10k_intfc *interface = netdev_priv(netdev);
 573         struct fm10k_iov_data *iov_data = interface->iov_data;
 574         struct fm10k_hw *hw = &interface->hw;
 575         struct fm10k_vf_info *vf_info;
 576 
 577         /* verify SR-IOV is active and that vf idx is valid */
 578         if (!iov_data || vf_idx >= iov_data->num_vfs)
 579                 return -EINVAL;
 580 
 581         /* QOS is unsupported and VLAN IDs accepted range 0-4094 */
 582         if (qos || (vid > (VLAN_VID_MASK - 1)))
 583                 return -EINVAL;
 584 
 585         /* VF VLAN Protocol part to default is unsupported */
 586         if (vlan_proto != htons(ETH_P_8021Q))
 587                 return -EPROTONOSUPPORT;
 588 
 589         vf_info = &iov_data->vf_info[vf_idx];
 590 
 591         /* exit if there is nothing to do */
 592         if (vf_info->pf_vid == vid)
 593                 return 0;
 594 
 595         /* record default VLAN ID for VF */
 596         vf_info->pf_vid = vid;
 597 
 598         /* Clear the VLAN table for the VF */
 599         hw->mac.ops.update_vlan(hw, FM10K_VLAN_ALL, vf_info->vsi, false);
 600 
 601         fm10k_reset_vf_info(interface, vf_info);
 602 
 603         return 0;
 604 }
 605 
 606 int fm10k_ndo_set_vf_bw(struct net_device *netdev, int vf_idx,
 607                         int __always_unused min_rate, int max_rate)
 608 {
 609         struct fm10k_intfc *interface = netdev_priv(netdev);
 610         struct fm10k_iov_data *iov_data = interface->iov_data;
 611         struct fm10k_hw *hw = &interface->hw;
 612 
 613         /* verify SR-IOV is active and that vf idx is valid */
 614         if (!iov_data || vf_idx >= iov_data->num_vfs)
 615                 return -EINVAL;
 616 
 617         /* rate limit cannot be less than 10Mbs or greater than link speed */
 618         if (max_rate &&
 619             (max_rate < FM10K_VF_TC_MIN || max_rate > FM10K_VF_TC_MAX))
 620                 return -EINVAL;
 621 
 622         /* store values */
 623         iov_data->vf_info[vf_idx].rate = max_rate;
 624 
 625         /* update hardware configuration */
 626         hw->iov.ops.configure_tc(hw, vf_idx, max_rate);
 627 
 628         return 0;
 629 }
 630 
 631 int fm10k_ndo_get_vf_config(struct net_device *netdev,
 632                             int vf_idx, struct ifla_vf_info *ivi)
 633 {
 634         struct fm10k_intfc *interface = netdev_priv(netdev);
 635         struct fm10k_iov_data *iov_data = interface->iov_data;
 636         struct fm10k_vf_info *vf_info;
 637 
 638         /* verify SR-IOV is active and that vf idx is valid */
 639         if (!iov_data || vf_idx >= iov_data->num_vfs)
 640                 return -EINVAL;
 641 
 642         vf_info = &iov_data->vf_info[vf_idx];
 643 
 644         ivi->vf = vf_idx;
 645         ivi->max_tx_rate = vf_info->rate;
 646         ivi->min_tx_rate = 0;
 647         ether_addr_copy(ivi->mac, vf_info->mac);
 648         ivi->vlan = vf_info->pf_vid;
 649         ivi->qos = 0;
 650 
 651         return 0;
 652 }