drivers/net/ethernet/marvell/octeontx2/nic/otx2_vf.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Marvell OcteonTx2 RVU Virtual Function ethernet driver */
   3
   4 #include <linux/etherdevice.h>
   5 #include <linux/module.h>
   6 #include <linux/pci.h>
   7
   8 #include "otx2_common.h"
   9 #include "otx2_reg.h"
  10
  11 #define DRV_NAME        "octeontx2-nicvf"
  12 #define DRV_STRING      "Marvell OcteonTX2 NIC Virtual Function Driver"
  13
  14 static const struct pci_device_id otx2_vf_id_table[] = {
  15         { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_OCTEONTX2_RVU_AFVF) },
  16         { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_OCTEONTX2_RVU_VF) },
  17         { }
  18 };
  19
  20 MODULE_AUTHOR("Sunil Goutham <sgoutham@marvell.com>");
  21 MODULE_DESCRIPTION(DRV_STRING);
  22 MODULE_LICENSE("GPL v2");
  23 MODULE_DEVICE_TABLE(pci, otx2_vf_id_table);
  24
  25 /* RVU VF Interrupt Vector Enumeration */
  26 enum {
  27         RVU_VF_INT_VEC_MBOX = 0x0,
  28 };
  29
  30 static void otx2vf_process_vfaf_mbox_msg(struct otx2_nic *vf,
  31                                          struct mbox_msghdr *msg)
  32 {
  33         if (msg->id >= MBOX_MSG_MAX) {
  34                 dev_err(vf->dev,
  35                         "Mbox msg with unknown ID %d\n", msg->id);
  36                 return;
  37         }
  38
  39         if (msg->sig != OTX2_MBOX_RSP_SIG) {
  40                 dev_err(vf->dev,
  41                         "Mbox msg with wrong signature %x, ID %d\n",
  42                         msg->sig, msg->id);
  43                 return;
  44         }
  45
  46         if (msg->rc == MBOX_MSG_INVALID) {
  47                 dev_err(vf->dev,
  48                         "PF/AF says the sent msg(s) %d were invalid\n",
  49                         msg->id);
  50                 return;
  51         }
  52
  53         switch (msg->id) {
  54         case MBOX_MSG_READY:
  55                 vf->pcifunc = msg->pcifunc;
  56                 break;
  57         case MBOX_MSG_MSIX_OFFSET:
  58                 mbox_handler_msix_offset(vf, (struct msix_offset_rsp *)msg);
  59                 break;
  60         case MBOX_MSG_NPA_LF_ALLOC:
  61                 mbox_handler_npa_lf_alloc(vf, (struct npa_lf_alloc_rsp *)msg);
  62                 break;
  63         case MBOX_MSG_NIX_LF_ALLOC:
  64                 mbox_handler_nix_lf_alloc(vf, (struct nix_lf_alloc_rsp *)msg);
  65                 break;
  66         case MBOX_MSG_NIX_TXSCH_ALLOC:
  67                 mbox_handler_nix_txsch_alloc(vf,
  68                                              (struct nix_txsch_alloc_rsp *)msg);
  69                 break;
  70         case MBOX_MSG_NIX_BP_ENABLE:
  71                 mbox_handler_nix_bp_enable(vf, (struct nix_bp_cfg_rsp *)msg);
  72                 break;
  73         default:
  74                 if (msg->rc)
  75                         dev_err(vf->dev,
  76                                 "Mbox msg response has err %d, ID %d\n",
  77                                 msg->rc, msg->id);
  78         }
  79 }
  80
  81 static void otx2vf_vfaf_mbox_handler(struct work_struct *work)
  82 {
  83         struct otx2_mbox_dev *mdev;
  84         struct mbox_hdr *rsp_hdr;
  85         struct mbox_msghdr *msg;
  86         struct otx2_mbox *mbox;
  87         struct mbox *af_mbox;
  88         int offset, id;
  89
  90         af_mbox = container_of(work, struct mbox, mbox_wrk);
  91         mbox = &af_mbox->mbox;
  92         mdev = &mbox->dev[0];
  93         rsp_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
  94         if (af_mbox->num_msgs == 0)
  95                 return;
  96         offset = mbox->rx_start + ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN);
  97
  98         for (id = 0; id < af_mbox->num_msgs; id++) {
  99                 msg = (struct mbox_msghdr *)(mdev->mbase + offset);
 100                 otx2vf_process_vfaf_mbox_msg(af_mbox->pfvf, msg);
 101                 offset = mbox->rx_start + msg->next_msgoff;
 102                 mdev->msgs_acked++;
 103         }
 104
 105         otx2_mbox_reset(mbox, 0);
 106 }
 107
 108 static int otx2vf_process_mbox_msg_up(struct otx2_nic *vf,
 109                                       struct mbox_msghdr *req)
 110 {
 111         struct msg_rsp *rsp;
 112         int err;
 113
 114         /* Check if valid, if not reply with a invalid msg */
 115         if (req->sig != OTX2_MBOX_REQ_SIG) {
 116                 otx2_reply_invalid_msg(&vf->mbox.mbox_up, 0, 0, req->id);
 117                 return -ENODEV;
 118         }
 119
 120         switch (req->id) {
 121         case MBOX_MSG_CGX_LINK_EVENT:
 122                 rsp = (struct msg_rsp *)otx2_mbox_alloc_msg(
 123                                                 &vf->mbox.mbox_up, 0,
 124                                                 sizeof(struct msg_rsp));
 125                 if (!rsp)
 126                         return -ENOMEM;
 127
 128                 rsp->hdr.id = MBOX_MSG_CGX_LINK_EVENT;
 129                 rsp->hdr.sig = OTX2_MBOX_RSP_SIG;
 130                 rsp->hdr.pcifunc = 0;
 131                 rsp->hdr.rc = 0;
 132                 err = otx2_mbox_up_handler_cgx_link_event(
 133                                 vf, (struct cgx_link_info_msg *)req, rsp);
 134                 return err;
 135         default:
 136                 otx2_reply_invalid_msg(&vf->mbox.mbox_up, 0, 0, req->id);
 137                 return -ENODEV;
 138         }
 139         return 0;
 140 }
 141
 142 static void otx2vf_vfaf_mbox_up_handler(struct work_struct *work)
 143 {
 144         struct otx2_mbox_dev *mdev;
 145         struct mbox_hdr *rsp_hdr;
 146         struct mbox_msghdr *msg;
 147         struct otx2_mbox *mbox;
 148         struct mbox *vf_mbox;
 149         struct otx2_nic *vf;
 150         int offset, id;
 151
 152         vf_mbox = container_of(work, struct mbox, mbox_up_wrk);
 153         vf = vf_mbox->pfvf;
 154         mbox = &vf_mbox->mbox_up;
 155         mdev = &mbox->dev[0];
 156
 157         rsp_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
 158         if (vf_mbox->up_num_msgs == 0)
 159                 return;
 160
 161         offset = mbox->rx_start + ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN);
 162
 163         for (id = 0; id < vf_mbox->up_num_msgs; id++) {
 164                 msg = (struct mbox_msghdr *)(mdev->mbase + offset);
 165                 otx2vf_process_mbox_msg_up(vf, msg);
 166                 offset = mbox->rx_start + msg->next_msgoff;
 167         }
 168
 169         otx2_mbox_msg_send(mbox, 0);
 170 }
 171
 172 static irqreturn_t otx2vf_vfaf_mbox_intr_handler(int irq, void *vf_irq)
 173 {
 174         struct otx2_nic *vf = (struct otx2_nic *)vf_irq;
 175         struct otx2_mbox_dev *mdev;
 176         struct otx2_mbox *mbox;
 177         struct mbox_hdr *hdr;
 178
 179         /* Clear the IRQ */
 180         otx2_write64(vf, RVU_VF_INT, BIT_ULL(0));
 181
 182         /* Read latest mbox data */
 183         smp_rmb();
 184
 185         /* Check for PF => VF response messages */
 186         mbox = &vf->mbox.mbox;
 187         mdev = &mbox->dev[0];
 188         otx2_sync_mbox_bbuf(mbox, 0);
 189
 190         hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
 191         if (hdr->num_msgs) {
 192                 vf->mbox.num_msgs = hdr->num_msgs;
 193                 hdr->num_msgs = 0;
 194                 memset(mbox->hwbase + mbox->rx_start, 0,
 195                        ALIGN(sizeof(struct mbox_hdr), sizeof(u64)));
 196                 queue_work(vf->mbox_wq, &vf->mbox.mbox_wrk);
 197         }
 198         /* Check for PF => VF notification messages */
 199         mbox = &vf->mbox.mbox_up;
 200         mdev = &mbox->dev[0];
 201         otx2_sync_mbox_bbuf(mbox, 0);
 202
 203         hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
 204         if (hdr->num_msgs) {
 205                 vf->mbox.up_num_msgs = hdr->num_msgs;
 206                 hdr->num_msgs = 0;
 207                 memset(mbox->hwbase + mbox->rx_start, 0,
 208                        ALIGN(sizeof(struct mbox_hdr), sizeof(u64)));
 209                 queue_work(vf->mbox_wq, &vf->mbox.mbox_up_wrk);
 210         }
 211
 212         return IRQ_HANDLED;
 213 }
 214
 215 static void otx2vf_disable_mbox_intr(struct otx2_nic *vf)
 216 {
 217         int vector = pci_irq_vector(vf->pdev, RVU_VF_INT_VEC_MBOX);
 218
 219         /* Disable VF => PF mailbox IRQ */
 220         otx2_write64(vf, RVU_VF_INT_ENA_W1C, BIT_ULL(0));
 221         free_irq(vector, vf);
 222 }
 223
 224 static int otx2vf_register_mbox_intr(struct otx2_nic *vf, bool probe_pf)
 225 {
 226         struct otx2_hw *hw = &vf->hw;
 227         struct msg_req *req;
 228         char *irq_name;
 229         int err;
 230
 231         /* Register mailbox interrupt handler */
 232         irq_name = &hw->irq_name[RVU_VF_INT_VEC_MBOX * NAME_SIZE];
 233         snprintf(irq_name, NAME_SIZE, "RVUVFAF Mbox");
 234         err = request_irq(pci_irq_vector(vf->pdev, RVU_VF_INT_VEC_MBOX),
 235                           otx2vf_vfaf_mbox_intr_handler, 0, irq_name, vf);
 236         if (err) {
 237                 dev_err(vf->dev,
 238                         "RVUPF: IRQ registration failed for VFAF mbox irq\n");
 239                 return err;
 240         }
 241
 242         /* Enable mailbox interrupt for msgs coming from PF.
 243          * First clear to avoid spurious interrupts, if any.
 244          */
 245         otx2_write64(vf, RVU_VF_INT, BIT_ULL(0));
 246         otx2_write64(vf, RVU_VF_INT_ENA_W1S, BIT_ULL(0));
 247
 248         if (!probe_pf)
 249                 return 0;
 250
 251         /* Check mailbox communication with PF */
 252         req = otx2_mbox_alloc_msg_ready(&vf->mbox);
 253         if (!req) {
 254                 otx2vf_disable_mbox_intr(vf);
 255                 return -ENOMEM;
 256         }
 257
 258         err = otx2_sync_mbox_msg(&vf->mbox);
 259         if (err) {
 260                 dev_warn(vf->dev,
 261                          "AF not responding to mailbox, deferring probe\n");
 262                 otx2vf_disable_mbox_intr(vf);
 263                 return -EPROBE_DEFER;
 264         }
 265         return 0;
 266 }
 267
 268 static void otx2vf_vfaf_mbox_destroy(struct otx2_nic *vf)
 269 {
 270         struct mbox *mbox = &vf->mbox;
 271
 272         if (vf->mbox_wq) {
 273                 flush_workqueue(vf->mbox_wq);
 274                 destroy_workqueue(vf->mbox_wq);
 275                 vf->mbox_wq = NULL;
 276         }
 277
 278         if (mbox->mbox.hwbase)
 279                 iounmap((void __iomem *)mbox->mbox.hwbase);
 280
 281         otx2_mbox_destroy(&mbox->mbox);
 282         otx2_mbox_destroy(&mbox->mbox_up);
 283 }
 284
 285 static int otx2vf_vfaf_mbox_init(struct otx2_nic *vf)
 286 {
 287         struct mbox *mbox = &vf->mbox;
 288         void __iomem *hwbase;
 289         int err;
 290
 291         mbox->pfvf = vf;
 292         vf->mbox_wq = alloc_workqueue("otx2_vfaf_mailbox",
 293                                       WQ_UNBOUND | WQ_HIGHPRI |
 294                                       WQ_MEM_RECLAIM, 1);
 295         if (!vf->mbox_wq)
 296                 return -ENOMEM;
 297
 298         /* Mailbox is a reserved memory (in RAM) region shared between
 299          * admin function (i.e PF0) and this VF, shouldn't be mapped as
 300          * device memory to allow unaligned accesses.
 301          */
 302         hwbase = ioremap_wc(pci_resource_start(vf->pdev, PCI_MBOX_BAR_NUM),
 303                             pci_resource_len(vf->pdev, PCI_MBOX_BAR_NUM));
 304         if (!hwbase) {
 305                 dev_err(vf->dev, "Unable to map VFAF mailbox region\n");
 306                 err = -ENOMEM;
 307                 goto exit;
 308         }
 309
 310         err = otx2_mbox_init(&mbox->mbox, hwbase, vf->pdev, vf->reg_base,
 311                              MBOX_DIR_VFPF, 1);
 312         if (err)
 313                 goto exit;
 314
 315         err = otx2_mbox_init(&mbox->mbox_up, hwbase, vf->pdev, vf->reg_base,
 316                              MBOX_DIR_VFPF_UP, 1);
 317         if (err)
 318                 goto exit;
 319
 320         err = otx2_mbox_bbuf_init(mbox, vf->pdev);
 321         if (err)
 322                 goto exit;
 323
 324         INIT_WORK(&mbox->mbox_wrk, otx2vf_vfaf_mbox_handler);
 325         INIT_WORK(&mbox->mbox_up_wrk, otx2vf_vfaf_mbox_up_handler);
 326         mutex_init(&mbox->lock);
 327
 328         return 0;
 329 exit:
 330         destroy_workqueue(vf->mbox_wq);
 331         return err;
 332 }
 333
 334 static int otx2vf_open(struct net_device *netdev)
 335 {
 336         struct otx2_nic *vf;
 337         int err;
 338
 339         err = otx2_open(netdev);
 340         if (err)
 341                 return err;
 342
 343         /* LBKs do not receive link events so tell everyone we are up here */
 344         vf = netdev_priv(netdev);
 345         if (is_otx2_lbkvf(vf->pdev)) {
 346                 pr_info("%s NIC Link is UP\n", netdev->name);
 347                 netif_carrier_on(netdev);
 348                 netif_tx_start_all_queues(netdev);
 349         }
 350
 351         return 0;
 352 }
 353
 354 static int otx2vf_stop(struct net_device *netdev)
 355 {
 356         return otx2_stop(netdev);
 357 }
 358
 359 static netdev_tx_t otx2vf_xmit(struct sk_buff *skb, struct net_device *netdev)
 360 {
 361         struct otx2_nic *vf = netdev_priv(netdev);
 362         int qidx = skb_get_queue_mapping(skb);
 363         struct otx2_snd_queue *sq;
 364         struct netdev_queue *txq;
 365
 366         sq = &vf->qset.sq[qidx];
 367         txq = netdev_get_tx_queue(netdev, qidx);
 368
 369         if (!otx2_sq_append_skb(netdev, sq, skb, qidx)) {
 370                 netif_tx_stop_queue(txq);
 371
 372                 /* Check again, incase SQBs got freed up */
 373                 smp_mb();
 374                 if (((sq->num_sqbs - *sq->aura_fc_addr) * sq->sqe_per_sqb)
 375                                                         > sq->sqe_thresh)
 376                         netif_tx_wake_queue(txq);
 377
 378                 return NETDEV_TX_BUSY;
 379         }
 380
 381         return NETDEV_TX_OK;
 382 }
 383
 384 static int otx2vf_change_mtu(struct net_device *netdev, int new_mtu)
 385 {
 386         bool if_up = netif_running(netdev);
 387         int err = 0;
 388
 389         if (if_up)
 390                 otx2vf_stop(netdev);
 391
 392         netdev_info(netdev, "Changing MTU from %d to %d\n",
 393                     netdev->mtu, new_mtu);
 394         netdev->mtu = new_mtu;
 395
 396         if (if_up)
 397                 err = otx2vf_open(netdev);
 398
 399         return err;
 400 }
 401
 402 static void otx2vf_reset_task(struct work_struct *work)
 403 {
 404         struct otx2_nic *vf = container_of(work, struct otx2_nic, reset_task);
 405
 406         rtnl_lock();
 407
 408         if (netif_running(vf->netdev)) {
 409                 otx2vf_stop(vf->netdev);
 410                 vf->reset_count++;
 411                 otx2vf_open(vf->netdev);
 412         }
 413
 414         rtnl_unlock();
 415 }
 416
 417 static const struct net_device_ops otx2vf_netdev_ops = {
 418         .ndo_open = otx2vf_open,
 419         .ndo_stop = otx2vf_stop,
 420         .ndo_start_xmit = otx2vf_xmit,
 421         .ndo_set_mac_address = otx2_set_mac_address,
 422         .ndo_change_mtu = otx2vf_change_mtu,
 423         .ndo_get_stats64 = otx2_get_stats64,
 424         .ndo_tx_timeout = otx2_tx_timeout,
 425 };
 426
 427 static int otx2vf_realloc_msix_vectors(struct otx2_nic *vf)
 428 {
 429         struct otx2_hw *hw = &vf->hw;
 430         int num_vec, err;
 431
 432         num_vec = hw->nix_msixoff;
 433         num_vec += NIX_LF_CINT_VEC_START + hw->max_queues;
 434
 435         otx2vf_disable_mbox_intr(vf);
 436         pci_free_irq_vectors(hw->pdev);
 437         err = pci_alloc_irq_vectors(hw->pdev, num_vec, num_vec, PCI_IRQ_MSIX);
 438         if (err < 0) {
 439                 dev_err(vf->dev, "%s: Failed to realloc %d IRQ vectors\n",
 440                         __func__, num_vec);
 441                 return err;
 442         }
 443
 444         return otx2vf_register_mbox_intr(vf, false);
 445 }
 446
 447 static int otx2vf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 448 {
 449         int num_vec = pci_msix_vec_count(pdev);
 450         struct device *dev = &pdev->dev;
 451         struct net_device *netdev;
 452         struct otx2_nic *vf;
 453         struct otx2_hw *hw;
 454         int err, qcount;
 455
 456         err = pcim_enable_device(pdev);
 457         if (err) {
 458                 dev_err(dev, "Failed to enable PCI device\n");
 459                 return err;
 460         }
 461
 462         err = pci_request_regions(pdev, DRV_NAME);
 463         if (err) {
 464                 dev_err(dev, "PCI request regions failed 0x%x\n", err);
 465                 return err;
 466         }
 467
 468         err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
 469         if (err) {
 470                 dev_err(dev, "DMA mask config failed, abort\n");
 471                 goto err_release_regions;
 472         }
 473
 474         pci_set_master(pdev);
 475
 476         qcount = num_online_cpus();
 477         netdev = alloc_etherdev_mqs(sizeof(*vf), qcount, qcount);
 478         if (!netdev) {
 479                 err = -ENOMEM;
 480                 goto err_release_regions;
 481         }
 482
 483         pci_set_drvdata(pdev, netdev);
 484         SET_NETDEV_DEV(netdev, &pdev->dev);
 485         vf = netdev_priv(netdev);
 486         vf->netdev = netdev;
 487         vf->pdev = pdev;
 488         vf->dev = dev;
 489         vf->iommu_domain = iommu_get_domain_for_dev(dev);
 490
 491         vf->flags |= OTX2_FLAG_INTF_DOWN;
 492         hw = &vf->hw;
 493         hw->pdev = vf->pdev;
 494         hw->rx_queues = qcount;
 495         hw->tx_queues = qcount;
 496         hw->max_queues = qcount;
 497
 498         hw->irq_name = devm_kmalloc_array(&hw->pdev->dev, num_vec, NAME_SIZE,
 499                                           GFP_KERNEL);
 500         if (!hw->irq_name) {
 501                 err = -ENOMEM;
 502                 goto err_free_netdev;
 503         }
 504
 505         hw->affinity_mask = devm_kcalloc(&hw->pdev->dev, num_vec,
 506                                          sizeof(cpumask_var_t), GFP_KERNEL);
 507         if (!hw->affinity_mask) {
 508                 err = -ENOMEM;
 509                 goto err_free_netdev;
 510         }
 511
 512         err = pci_alloc_irq_vectors(hw->pdev, num_vec, num_vec, PCI_IRQ_MSIX);
 513         if (err < 0) {
 514                 dev_err(dev, "%s: Failed to alloc %d IRQ vectors\n",
 515                         __func__, num_vec);
 516                 goto err_free_netdev;
 517         }
 518
 519         vf->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0);
 520         if (!vf->reg_base) {
 521                 dev_err(dev, "Unable to map physical function CSRs, aborting\n");
 522                 err = -ENOMEM;
 523                 goto err_free_irq_vectors;
 524         }
 525
 526         /* Init VF <=> PF mailbox stuff */
 527         err = otx2vf_vfaf_mbox_init(vf);
 528         if (err)
 529                 goto err_free_irq_vectors;
 530
 531         /* Register mailbox interrupt */
 532         err = otx2vf_register_mbox_intr(vf, true);
 533         if (err)
 534                 goto err_mbox_destroy;
 535
 536         /* Request AF to attach NPA and LIX LFs to this AF */
 537         err = otx2_attach_npa_nix(vf);
 538         if (err)
 539                 goto err_disable_mbox_intr;
 540
 541         err = otx2vf_realloc_msix_vectors(vf);
 542         if (err)
 543                 goto err_mbox_destroy;
 544
 545         err = otx2_set_real_num_queues(netdev, qcount, qcount);
 546         if (err)
 547                 goto err_detach_rsrc;
 548
 549         otx2_setup_dev_hw_settings(vf);
 550
 551         /* Assign default mac address */
 552         otx2_get_mac_from_af(netdev);
 553
 554         netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM |
 555                               NETIF_F_IPV6_CSUM | NETIF_F_RXHASH |
 556                               NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6;
 557         netdev->features = netdev->hw_features;
 558
 559         netdev->gso_max_segs = OTX2_MAX_GSO_SEGS;
 560         netdev->watchdog_timeo = OTX2_TX_TIMEOUT;
 561
 562         netdev->netdev_ops = &otx2vf_netdev_ops;
 563
 564         /* MTU range: 68 - 9190 */
 565         netdev->min_mtu = OTX2_MIN_MTU;
 566         netdev->max_mtu = OTX2_MAX_MTU;
 567
 568         INIT_WORK(&vf->reset_task, otx2vf_reset_task);
 569
 570         /* To distinguish, for LBK VFs set netdev name explicitly */
 571         if (is_otx2_lbkvf(vf->pdev)) {
 572                 int n;
 573
 574                 n = (vf->pcifunc >> RVU_PFVF_FUNC_SHIFT) & RVU_PFVF_FUNC_MASK;
 575                 /* Need to subtract 1 to get proper VF number */
 576                 n -= 1;
 577                 snprintf(netdev->name, sizeof(netdev->name), "lbk%d", n);
 578         }
 579
 580         err = register_netdev(netdev);
 581         if (err) {
 582                 dev_err(dev, "Failed to register netdevice\n");
 583                 goto err_detach_rsrc;
 584         }
 585
 586         otx2vf_set_ethtool_ops(netdev);
 587
 588         /* Enable pause frames by default */
 589         vf->flags |= OTX2_FLAG_RX_PAUSE_ENABLED;
 590         vf->flags |= OTX2_FLAG_TX_PAUSE_ENABLED;
 591
 592         return 0;
 593
 594 err_detach_rsrc:
 595         otx2_detach_resources(&vf->mbox);
 596 err_disable_mbox_intr:
 597         otx2vf_disable_mbox_intr(vf);
 598 err_mbox_destroy:
 599         otx2vf_vfaf_mbox_destroy(vf);
 600 err_free_irq_vectors:
 601         pci_free_irq_vectors(hw->pdev);
 602 err_free_netdev:
 603         pci_set_drvdata(pdev, NULL);
 604         free_netdev(netdev);
 605 err_release_regions:
 606         pci_release_regions(pdev);
 607         return err;
 608 }
 609
 610 static void otx2vf_remove(struct pci_dev *pdev)
 611 {
 612         struct net_device *netdev = pci_get_drvdata(pdev);
 613         struct otx2_nic *vf;
 614
 615         if (!netdev)
 616                 return;
 617
 618         vf = netdev_priv(netdev);
 619
 620         otx2vf_disable_mbox_intr(vf);
 621
 622         otx2_detach_resources(&vf->mbox);
 623         otx2vf_vfaf_mbox_destroy(vf);
 624         pci_free_irq_vectors(vf->pdev);
 625         pci_set_drvdata(pdev, NULL);
 626         free_netdev(netdev);
 627
 628         pci_release_regions(pdev);
 629 }
 630
 631 static struct pci_driver otx2vf_driver = {
 632         .name = DRV_NAME,
 633         .id_table = otx2_vf_id_table,
 634         .probe = otx2vf_probe,
 635         .remove = otx2vf_remove,
 636         .shutdown = otx2vf_remove,
 637 };
 638
 639 static int __init otx2vf_init_module(void)
 640 {
 641         pr_info("%s: %s\n", DRV_NAME, DRV_STRING);
 642
 643         return pci_register_driver(&otx2vf_driver);
 644 }
 645
 646 static void __exit otx2vf_cleanup_module(void)
 647 {
 648         pci_unregister_driver(&otx2vf_driver);
 649 }
 650
 651 module_init(otx2vf_init_module);
 652 module_exit(otx2vf_cleanup_module);