drivers/net/ethernet/cavium/liquidio/lio_vf_main.c

   1 /**********************************************************************
   2  * Author: Cavium, Inc.
   3  *
   4  * Contact: support@cavium.com
   5  *          Please include "LiquidIO" in the subject.
   6  *
   7  * Copyright (c) 2003-2016 Cavium, Inc.
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more details.
  17  ***********************************************************************/
  18 #include <linux/module.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/pci.h>
  21 #include <net/vxlan.h>
  22 #include "liquidio_common.h"
  23 #include "octeon_droq.h"
  24 #include "octeon_iq.h"
  25 #include "response_manager.h"
  26 #include "octeon_device.h"
  27 #include "octeon_nic.h"
  28 #include "octeon_main.h"
  29 #include "octeon_network.h"
  30 #include "cn23xx_vf_device.h"
  31
  32 MODULE_AUTHOR("Cavium Networks, <support@cavium.com>");
  33 MODULE_DESCRIPTION("Cavium LiquidIO Intelligent Server Adapter Virtual Function Driver");
  34 MODULE_LICENSE("GPL");
  35 MODULE_VERSION(LIQUIDIO_VERSION);
  36
  37 static int debug = -1;
  38 module_param(debug, int, 0644);
  39 MODULE_PARM_DESC(debug, "NETIF_MSG debug bits");
  40
  41 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
  42
  43 struct oct_timestamp_resp {
  44         u64 rh;
  45         u64 timestamp;
  46         u64 status;
  47 };
  48
  49 union tx_info {
  50         u64 u64;
  51         struct {
  52 #ifdef __BIG_ENDIAN_BITFIELD
  53                 u16 gso_size;
  54                 u16 gso_segs;
  55                 u32 reserved;
  56 #else
  57                 u32 reserved;
  58                 u16 gso_segs;
  59                 u16 gso_size;
  60 #endif
  61         } s;
  62 };
  63
  64 #define OCTNIC_GSO_MAX_HEADER_SIZE 128
  65 #define OCTNIC_GSO_MAX_SIZE \
  66                 (CN23XX_DEFAULT_INPUT_JABBER - OCTNIC_GSO_MAX_HEADER_SIZE)
  67
  68 static int
  69 liquidio_vf_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
  70 static void liquidio_vf_remove(struct pci_dev *pdev);
  71 static int octeon_device_init(struct octeon_device *oct);
  72 static int liquidio_stop(struct net_device *netdev);
  73
  74 static int lio_wait_for_oq_pkts(struct octeon_device *oct)
  75 {
  76         struct octeon_device_priv *oct_priv =
  77             (struct octeon_device_priv *)oct->priv;
  78         int retry = MAX_IO_PENDING_PKT_COUNT;
  79         int pkt_cnt = 0, pending_pkts;
  80         int i;
  81
  82         do {
  83                 pending_pkts = 0;
  84
  85                 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
  86                         if (!(oct->io_qmask.oq & BIT_ULL(i)))
  87                                 continue;
  88                         pkt_cnt += octeon_droq_check_hw_for_pkts(oct->droq[i]);
  89                 }
  90                 if (pkt_cnt > 0) {
  91                         pending_pkts += pkt_cnt;
  92                         tasklet_schedule(&oct_priv->droq_tasklet);
  93                 }
  94                 pkt_cnt = 0;
  95                 schedule_timeout_uninterruptible(1);
  96
  97         } while (retry-- && pending_pkts);
  98
  99         return pkt_cnt;
 100 }
 101
 102 /**
 103  * \brief Cause device to go quiet so it can be safely removed/reset/etc
 104  * @param oct Pointer to Octeon device
 105  */
 106 static void pcierror_quiesce_device(struct octeon_device *oct)
 107 {
 108         int i;
 109
 110         /* Disable the input and output queues now. No more packets will
 111          * arrive from Octeon, but we should wait for all packet processing
 112          * to finish.
 113          */
 114
 115         /* To allow for in-flight requests */
 116         schedule_timeout_uninterruptible(100);
 117
 118         if (wait_for_pending_requests(oct))
 119                 dev_err(&oct->pci_dev->dev, "There were pending requests\n");
 120
 121         /* Force all requests waiting to be fetched by OCTEON to complete. */
 122         for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
 123                 struct octeon_instr_queue *iq;
 124
 125                 if (!(oct->io_qmask.iq & BIT_ULL(i)))
 126                         continue;
 127                 iq = oct->instr_queue[i];
 128
 129                 if (atomic_read(&iq->instr_pending)) {
 130                         spin_lock_bh(&iq->lock);
 131                         iq->fill_cnt = 0;
 132                         iq->octeon_read_index = iq->host_write_index;
 133                         iq->stats.instr_processed +=
 134                             atomic_read(&iq->instr_pending);
 135                         lio_process_iq_request_list(oct, iq, 0);
 136                         spin_unlock_bh(&iq->lock);
 137                 }
 138         }
 139
 140         /* Force all pending ordered list requests to time out. */
 141         lio_process_ordered_list(oct, 1);
 142
 143         /* We do not need to wait for output queue packets to be processed. */
 144 }
 145
 146 /**
 147  * \brief Cleanup PCI AER uncorrectable error status
 148  * @param dev Pointer to PCI device
 149  */
 150 static void cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
 151 {
 152         u32 status, mask;
 153         int pos = 0x100;
 154
 155         pr_info("%s :\n", __func__);
 156
 157         pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
 158         pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
 159         if (dev->error_state == pci_channel_io_normal)
 160                 status &= ~mask; /* Clear corresponding nonfatal bits */
 161         else
 162                 status &= mask; /* Clear corresponding fatal bits */
 163         pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
 164 }
 165
 166 /**
 167  * \brief Stop all PCI IO to a given device
 168  * @param dev Pointer to Octeon device
 169  */
 170 static void stop_pci_io(struct octeon_device *oct)
 171 {
 172         struct msix_entry *msix_entries;
 173         int i;
 174
 175         /* No more instructions will be forwarded. */
 176         atomic_set(&oct->status, OCT_DEV_IN_RESET);
 177
 178         for (i = 0; i < oct->ifcount; i++)
 179                 netif_device_detach(oct->props[i].netdev);
 180
 181         /* Disable interrupts  */
 182         oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
 183
 184         pcierror_quiesce_device(oct);
 185         if (oct->msix_on) {
 186                 msix_entries = (struct msix_entry *)oct->msix_entries;
 187                 for (i = 0; i < oct->num_msix_irqs; i++) {
 188                         /* clear the affinity_cpumask */
 189                         irq_set_affinity_hint(msix_entries[i].vector,
 190                                               NULL);
 191                         free_irq(msix_entries[i].vector,
 192                                  &oct->ioq_vector[i]);
 193                 }
 194                 pci_disable_msix(oct->pci_dev);
 195                 kfree(oct->msix_entries);
 196                 oct->msix_entries = NULL;
 197                 octeon_free_ioq_vector(oct);
 198         }
 199         dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
 200                 lio_get_state_string(&oct->status));
 201
 202         /* making it a common function for all OCTEON models */
 203         cleanup_aer_uncorrect_error_status(oct->pci_dev);
 204
 205         pci_disable_device(oct->pci_dev);
 206 }
 207
 208 /**
 209  * \brief called when PCI error is detected
 210  * @param pdev Pointer to PCI device
 211  * @param state The current pci connection state
 212  *
 213  * This function is called after a PCI bus error affecting
 214  * this device has been detected.
 215  */
 216 static pci_ers_result_t liquidio_pcie_error_detected(struct pci_dev *pdev,
 217                                                      pci_channel_state_t state)
 218 {
 219         struct octeon_device *oct = pci_get_drvdata(pdev);
 220
 221         /* Non-correctable Non-fatal errors */
 222         if (state == pci_channel_io_normal) {
 223                 dev_err(&oct->pci_dev->dev, "Non-correctable non-fatal error reported:\n");
 224                 cleanup_aer_uncorrect_error_status(oct->pci_dev);
 225                 return PCI_ERS_RESULT_CAN_RECOVER;
 226         }
 227
 228         /* Non-correctable Fatal errors */
 229         dev_err(&oct->pci_dev->dev, "Non-correctable FATAL reported by PCI AER driver\n");
 230         stop_pci_io(oct);
 231
 232         return PCI_ERS_RESULT_DISCONNECT;
 233 }
 234
 235 /* For PCI-E Advanced Error Recovery (AER) Interface */
 236 static const struct pci_error_handlers liquidio_vf_err_handler = {
 237         .error_detected = liquidio_pcie_error_detected,
 238 };
 239
 240 static const struct pci_device_id liquidio_vf_pci_tbl[] = {
 241         {
 242                 PCI_VENDOR_ID_CAVIUM, OCTEON_CN23XX_VF_VID,
 243                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
 244         },
 245         {
 246                 0, 0, 0, 0, 0, 0, 0
 247         }
 248 };
 249 MODULE_DEVICE_TABLE(pci, liquidio_vf_pci_tbl);
 250
 251 static struct pci_driver liquidio_vf_pci_driver = {
 252         .name           = "LiquidIO_VF",
 253         .id_table       = liquidio_vf_pci_tbl,
 254         .probe          = liquidio_vf_probe,
 255         .remove         = liquidio_vf_remove,
 256         .err_handler    = &liquidio_vf_err_handler,    /* For AER */
 257 };
 258
 259 /**
 260  * \brief Print link information
 261  * @param netdev network device
 262  */
 263 static void print_link_info(struct net_device *netdev)
 264 {
 265         struct lio *lio = GET_LIO(netdev);
 266
 267         if (!ifstate_check(lio, LIO_IFSTATE_RESETTING) &&
 268             ifstate_check(lio, LIO_IFSTATE_REGISTERED)) {
 269                 struct oct_link_info *linfo = &lio->linfo;
 270
 271                 if (linfo->link.s.link_up) {
 272                         netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
 273                                    linfo->link.s.speed,
 274                                    (linfo->link.s.duplex) ? "Full" : "Half");
 275                 } else {
 276                         netif_info(lio, link, lio->netdev, "Link Down\n");
 277                 }
 278         }
 279 }
 280
 281 /**
 282  * \brief Routine to notify MTU change
 283  * @param work work_struct data structure
 284  */
 285 static void octnet_link_status_change(struct work_struct *work)
 286 {
 287         struct cavium_wk *wk = (struct cavium_wk *)work;
 288         struct lio *lio = (struct lio *)wk->ctxptr;
 289
 290         /* lio->linfo.link.s.mtu always contains max MTU of the lio interface.
 291          * this API is invoked only when new max-MTU of the interface is
 292          * less than current MTU.
 293          */
 294         rtnl_lock();
 295         dev_set_mtu(lio->netdev, lio->linfo.link.s.mtu);
 296         rtnl_unlock();
 297 }
 298
 299 /**
 300  * \brief Sets up the mtu status change work
 301  * @param netdev network device
 302  */
 303 static int setup_link_status_change_wq(struct net_device *netdev)
 304 {
 305         struct lio *lio = GET_LIO(netdev);
 306         struct octeon_device *oct = lio->oct_dev;
 307
 308         lio->link_status_wq.wq = alloc_workqueue("link-status",
 309                                                  WQ_MEM_RECLAIM, 0);
 310         if (!lio->link_status_wq.wq) {
 311                 dev_err(&oct->pci_dev->dev, "unable to create cavium link status wq\n");
 312                 return -1;
 313         }
 314         INIT_DELAYED_WORK(&lio->link_status_wq.wk.work,
 315                           octnet_link_status_change);
 316         lio->link_status_wq.wk.ctxptr = lio;
 317
 318         return 0;
 319 }
 320
 321 static void cleanup_link_status_change_wq(struct net_device *netdev)
 322 {
 323         struct lio *lio = GET_LIO(netdev);
 324
 325         if (lio->link_status_wq.wq) {
 326                 cancel_delayed_work_sync(&lio->link_status_wq.wk.work);
 327                 destroy_workqueue(lio->link_status_wq.wq);
 328         }
 329 }
 330
 331 /**
 332  * \brief Update link status
 333  * @param netdev network device
 334  * @param ls link status structure
 335  *
 336  * Called on receipt of a link status response from the core application to
 337  * update each interface's link status.
 338  */
 339 static void update_link_status(struct net_device *netdev,
 340                                union oct_link_status *ls)
 341 {
 342         struct lio *lio = GET_LIO(netdev);
 343         int current_max_mtu = lio->linfo.link.s.mtu;
 344         struct octeon_device *oct = lio->oct_dev;
 345
 346         if ((lio->intf_open) && (lio->linfo.link.u64 != ls->u64)) {
 347                 lio->linfo.link.u64 = ls->u64;
 348
 349                 print_link_info(netdev);
 350                 lio->link_changes++;
 351
 352                 if (lio->linfo.link.s.link_up) {
 353                         netif_carrier_on(netdev);
 354                         wake_txqs(netdev);
 355                 } else {
 356                         netif_carrier_off(netdev);
 357                         stop_txqs(netdev);
 358                 }
 359
 360                 if (lio->linfo.link.s.mtu != current_max_mtu) {
 361                         dev_info(&oct->pci_dev->dev,
 362                                  "Max MTU Changed from %d to %d\n",
 363                                  current_max_mtu, lio->linfo.link.s.mtu);
 364                         netdev->max_mtu = lio->linfo.link.s.mtu;
 365                 }
 366
 367                 if (lio->linfo.link.s.mtu < netdev->mtu) {
 368                         dev_warn(&oct->pci_dev->dev,
 369                                  "Current MTU is higher than new max MTU; Reducing the current mtu from %d to %d\n",
 370                                  netdev->mtu, lio->linfo.link.s.mtu);
 371                         queue_delayed_work(lio->link_status_wq.wq,
 372                                            &lio->link_status_wq.wk.work, 0);
 373                 }
 374         }
 375 }
 376
 377 /**
 378  * \brief PCI probe handler
 379  * @param pdev PCI device structure
 380  * @param ent unused
 381  */
 382 static int
 383 liquidio_vf_probe(struct pci_dev *pdev,
 384                   const struct pci_device_id *ent __attribute__((unused)))
 385 {
 386         struct octeon_device *oct_dev = NULL;
 387
 388         oct_dev = octeon_allocate_device(pdev->device,
 389                                          sizeof(struct octeon_device_priv));
 390
 391         if (!oct_dev) {
 392                 dev_err(&pdev->dev, "Unable to allocate device\n");
 393                 return -ENOMEM;
 394         }
 395         oct_dev->msix_on = LIO_FLAG_MSIX_ENABLED;
 396
 397         dev_info(&pdev->dev, "Initializing device %x:%x.\n",
 398                  (u32)pdev->vendor, (u32)pdev->device);
 399
 400         /* Assign octeon_device for this device to the private data area. */
 401         pci_set_drvdata(pdev, oct_dev);
 402
 403         /* set linux specific device pointer */
 404         oct_dev->pci_dev = pdev;
 405
 406         oct_dev->subsystem_id = pdev->subsystem_vendor |
 407                 (pdev->subsystem_device << 16);
 408
 409         if (octeon_device_init(oct_dev)) {
 410                 liquidio_vf_remove(pdev);
 411                 return -ENOMEM;
 412         }
 413
 414         dev_dbg(&oct_dev->pci_dev->dev, "Device is ready\n");
 415
 416         return 0;
 417 }
 418
 419 /**
 420  * \brief PCI FLR for each Octeon device.
 421  * @param oct octeon device
 422  */
 423 static void octeon_pci_flr(struct octeon_device *oct)
 424 {
 425         pci_save_state(oct->pci_dev);
 426
 427         pci_cfg_access_lock(oct->pci_dev);
 428
 429         /* Quiesce the device completely */
 430         pci_write_config_word(oct->pci_dev, PCI_COMMAND,
 431                               PCI_COMMAND_INTX_DISABLE);
 432
 433         pcie_flr(oct->pci_dev);
 434
 435         pci_cfg_access_unlock(oct->pci_dev);
 436
 437         pci_restore_state(oct->pci_dev);
 438 }
 439
 440 /**
 441  *\brief Destroy resources associated with octeon device
 442  * @param pdev PCI device structure
 443  * @param ent unused
 444  */
 445 static void octeon_destroy_resources(struct octeon_device *oct)
 446 {
 447         struct octeon_device_priv *oct_priv =
 448                 (struct octeon_device_priv *)oct->priv;
 449         struct msix_entry *msix_entries;
 450         int i;
 451
 452         switch (atomic_read(&oct->status)) {
 453         case OCT_DEV_RUNNING:
 454         case OCT_DEV_CORE_OK:
 455                 /* No more instructions will be forwarded. */
 456                 atomic_set(&oct->status, OCT_DEV_IN_RESET);
 457
 458                 oct->app_mode = CVM_DRV_INVALID_APP;
 459                 dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
 460                         lio_get_state_string(&oct->status));
 461
 462                 schedule_timeout_uninterruptible(HZ / 10);
 463
 464                 /* fallthrough */
 465         case OCT_DEV_HOST_OK:
 466                 /* fallthrough */
 467         case OCT_DEV_IO_QUEUES_DONE:
 468                 if (lio_wait_for_instr_fetch(oct))
 469                         dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");
 470
 471                 if (wait_for_pending_requests(oct))
 472                         dev_err(&oct->pci_dev->dev, "There were pending requests\n");
 473
 474                 /* Disable the input and output queues now. No more packets will
 475                  * arrive from Octeon, but we should wait for all packet
 476                  * processing to finish.
 477                  */
 478                 oct->fn_list.disable_io_queues(oct);
 479
 480                 if (lio_wait_for_oq_pkts(oct))
 481                         dev_err(&oct->pci_dev->dev, "OQ had pending packets\n");
 482
 483                 /* Force all requests waiting to be fetched by OCTEON to
 484                  * complete.
 485                  */
 486                 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
 487                         struct octeon_instr_queue *iq;
 488
 489                         if (!(oct->io_qmask.iq & BIT_ULL(i)))
 490                                 continue;
 491                         iq = oct->instr_queue[i];
 492
 493                         if (atomic_read(&iq->instr_pending)) {
 494                                 spin_lock_bh(&iq->lock);
 495                                 iq->fill_cnt = 0;
 496                                 iq->octeon_read_index = iq->host_write_index;
 497                                 iq->stats.instr_processed +=
 498                                         atomic_read(&iq->instr_pending);
 499                                 lio_process_iq_request_list(oct, iq, 0);
 500                                 spin_unlock_bh(&iq->lock);
 501                         }
 502                 }
 503
 504                 lio_process_ordered_list(oct, 1);
 505                 octeon_free_sc_done_list(oct);
 506                 octeon_free_sc_zombie_list(oct);
 507
 508         /* fall through */
 509         case OCT_DEV_INTR_SET_DONE:
 510                 /* Disable interrupts  */
 511                 oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
 512
 513                 if (oct->msix_on) {
 514                         msix_entries = (struct msix_entry *)oct->msix_entries;
 515                         for (i = 0; i < oct->num_msix_irqs; i++) {
 516                                 if (oct->ioq_vector[i].vector) {
 517                                         irq_set_affinity_hint(
 518                                                         msix_entries[i].vector,
 519                                                         NULL);
 520                                         free_irq(msix_entries[i].vector,
 521                                                  &oct->ioq_vector[i]);
 522                                         oct->ioq_vector[i].vector = 0;
 523                                 }
 524                         }
 525                         pci_disable_msix(oct->pci_dev);
 526                         kfree(oct->msix_entries);
 527                         oct->msix_entries = NULL;
 528                         kfree(oct->irq_name_storage);
 529                         oct->irq_name_storage = NULL;
 530                 }
 531                 /* Soft reset the octeon device before exiting */
 532                 if (oct->pci_dev->reset_fn)
 533                         octeon_pci_flr(oct);
 534                 else
 535                         cn23xx_vf_ask_pf_to_do_flr(oct);
 536
 537                 /* fallthrough */
 538         case OCT_DEV_MSIX_ALLOC_VECTOR_DONE:
 539                 octeon_free_ioq_vector(oct);
 540
 541                 /* fallthrough */
 542         case OCT_DEV_MBOX_SETUP_DONE:
 543                 oct->fn_list.free_mbox(oct);
 544
 545                 /* fallthrough */
 546         case OCT_DEV_IN_RESET:
 547         case OCT_DEV_DROQ_INIT_DONE:
 548                 mdelay(100);
 549                 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
 550                         if (!(oct->io_qmask.oq & BIT_ULL(i)))
 551                                 continue;
 552                         octeon_delete_droq(oct, i);
 553                 }
 554
 555                 /* fallthrough */
 556         case OCT_DEV_RESP_LIST_INIT_DONE:
 557                 octeon_delete_response_list(oct);
 558
 559                 /* fallthrough */
 560         case OCT_DEV_INSTR_QUEUE_INIT_DONE:
 561                 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
 562                         if (!(oct->io_qmask.iq & BIT_ULL(i)))
 563                                 continue;
 564                         octeon_delete_instr_queue(oct, i);
 565                 }
 566
 567                 /* fallthrough */
 568         case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
 569                 octeon_free_sc_buffer_pool(oct);
 570
 571                 /* fallthrough */
 572         case OCT_DEV_DISPATCH_INIT_DONE:
 573                 octeon_delete_dispatch_list(oct);
 574                 cancel_delayed_work_sync(&oct->nic_poll_work.work);
 575
 576                 /* fallthrough */
 577         case OCT_DEV_PCI_MAP_DONE:
 578                 octeon_unmap_pci_barx(oct, 0);
 579                 octeon_unmap_pci_barx(oct, 1);
 580
 581                 /* fallthrough */
 582         case OCT_DEV_PCI_ENABLE_DONE:
 583                 pci_clear_master(oct->pci_dev);
 584                 /* Disable the device, releasing the PCI INT */
 585                 pci_disable_device(oct->pci_dev);
 586
 587                 /* fallthrough */
 588         case OCT_DEV_BEGIN_STATE:
 589                 /* Nothing to be done here either */
 590                 break;
 591         }
 592
 593         tasklet_kill(&oct_priv->droq_tasklet);
 594 }
 595
 596 /**
 597  * \brief Send Rx control command
 598  * @param lio per-network private data
 599  * @param start_stop whether to start or stop
 600  */
 601 static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
 602 {
 603         struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
 604         struct octeon_soft_command *sc;
 605         union octnet_cmd *ncmd;
 606         int retval;
 607
 608         if (oct->props[lio->ifidx].rx_on == start_stop)
 609                 return;
 610
 611         sc = (struct octeon_soft_command *)
 612                 octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
 613                                           16, 0);
 614
 615         ncmd = (union octnet_cmd *)sc->virtdptr;
 616
 617         ncmd->u64 = 0;
 618         ncmd->s.cmd = OCTNET_CMD_RX_CTL;
 619         ncmd->s.param1 = start_stop;
 620
 621         octeon_swap_8B_data((u64 *)ncmd, (OCTNET_CMD_SIZE >> 3));
 622
 623         sc->iq_no = lio->linfo.txpciq[0].s.q_no;
 624
 625         octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
 626                                     OPCODE_NIC_CMD, 0, 0, 0);
 627
 628         init_completion(&sc->complete);
 629         sc->sc_status = OCTEON_REQUEST_PENDING;
 630
 631         retval = octeon_send_soft_command(oct, sc);
 632         if (retval == IQ_SEND_FAILED) {
 633                 netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
 634                 octeon_free_soft_command(oct, sc);
 635         } else {
 636                 /* Sleep on a wait queue till the cond flag indicates that the
 637                  * response arrived or timed-out.
 638                  */
 639                 retval = wait_for_sc_completion_timeout(oct, sc, 0);
 640                 if (retval)
 641                         return;
 642
 643                 oct->props[lio->ifidx].rx_on = start_stop;
 644                 WRITE_ONCE(sc->caller_is_done, true);
 645         }
 646 }
 647
 648 /**
 649  * \brief Destroy NIC device interface
 650  * @param oct octeon device
 651  * @param ifidx which interface to destroy
 652  *
 653  * Cleanup associated with each interface for an Octeon device  when NIC
 654  * module is being unloaded or if initialization fails during load.
 655  */
 656 static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
 657 {
 658         struct net_device *netdev = oct->props[ifidx].netdev;
 659         struct octeon_device_priv *oct_priv =
 660                 (struct octeon_device_priv *)oct->priv;
 661         struct napi_struct *napi, *n;
 662         struct lio *lio;
 663
 664         if (!netdev) {
 665                 dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
 666                         __func__, ifidx);
 667                 return;
 668         }
 669
 670         lio = GET_LIO(netdev);
 671
 672         dev_dbg(&oct->pci_dev->dev, "NIC device cleanup\n");
 673
 674         if (atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING)
 675                 liquidio_stop(netdev);
 676
 677         if (oct->props[lio->ifidx].napi_enabled == 1) {
 678                 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
 679                         napi_disable(napi);
 680
 681                 oct->props[lio->ifidx].napi_enabled = 0;
 682
 683                 oct->droq[0]->ops.poll_mode = 0;
 684         }
 685
 686         /* Delete NAPI */
 687         list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
 688                 netif_napi_del(napi);
 689
 690         tasklet_enable(&oct_priv->droq_tasklet);
 691
 692         if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
 693                 unregister_netdev(netdev);
 694
 695         cleanup_rx_oom_poll_fn(netdev);
 696
 697         cleanup_link_status_change_wq(netdev);
 698
 699         lio_delete_glists(lio);
 700
 701         free_netdev(netdev);
 702
 703         oct->props[ifidx].gmxport = -1;
 704
 705         oct->props[ifidx].netdev = NULL;
 706 }
 707
 708 /**
 709  * \brief Stop complete NIC functionality
 710  * @param oct octeon device
 711  */
 712 static int liquidio_stop_nic_module(struct octeon_device *oct)
 713 {
 714         struct lio *lio;
 715         int i, j;
 716
 717         dev_dbg(&oct->pci_dev->dev, "Stopping network interfaces\n");
 718         if (!oct->ifcount) {
 719                 dev_err(&oct->pci_dev->dev, "Init for Octeon was not completed\n");
 720                 return 1;
 721         }
 722
 723         spin_lock_bh(&oct->cmd_resp_wqlock);
 724         oct->cmd_resp_state = OCT_DRV_OFFLINE;
 725         spin_unlock_bh(&oct->cmd_resp_wqlock);
 726
 727         for (i = 0; i < oct->ifcount; i++) {
 728                 lio = GET_LIO(oct->props[i].netdev);
 729                 for (j = 0; j < oct->num_oqs; j++)
 730                         octeon_unregister_droq_ops(oct,
 731                                                    lio->linfo.rxpciq[j].s.q_no);
 732         }
 733
 734         for (i = 0; i < oct->ifcount; i++)
 735                 liquidio_destroy_nic_device(oct, i);
 736
 737         dev_dbg(&oct->pci_dev->dev, "Network interfaces stopped\n");
 738         return 0;
 739 }
 740
 741 /**
 742  * \brief Cleans up resources at unload time
 743  * @param pdev PCI device structure
 744  */
 745 static void liquidio_vf_remove(struct pci_dev *pdev)
 746 {
 747         struct octeon_device *oct_dev = pci_get_drvdata(pdev);
 748
 749         dev_dbg(&oct_dev->pci_dev->dev, "Stopping device\n");
 750
 751         if (oct_dev->app_mode == CVM_DRV_NIC_APP)
 752                 liquidio_stop_nic_module(oct_dev);
 753
 754         /* Reset the octeon device and cleanup all memory allocated for
 755          * the octeon device by driver.
 756          */
 757         octeon_destroy_resources(oct_dev);
 758
 759         dev_info(&oct_dev->pci_dev->dev, "Device removed\n");
 760
 761         /* This octeon device has been removed. Update the global
 762          * data structure to reflect this. Free the device structure.
 763          */
 764         octeon_free_device_mem(oct_dev);
 765 }
 766
 767 /**
 768  * \brief PCI initialization for each Octeon device.
 769  * @param oct octeon device
 770  */
 771 static int octeon_pci_os_setup(struct octeon_device *oct)
 772 {
 773 #ifdef CONFIG_PCI_IOV
 774         /* setup PCI stuff first */
 775         if (!oct->pci_dev->physfn)
 776                 octeon_pci_flr(oct);
 777 #endif
 778
 779         if (pci_enable_device(oct->pci_dev)) {
 780                 dev_err(&oct->pci_dev->dev, "pci_enable_device failed\n");
 781                 return 1;
 782         }
 783
 784         if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
 785                 dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
 786                 pci_disable_device(oct->pci_dev);
 787                 return 1;
 788         }
 789
 790         /* Enable PCI DMA Master. */
 791         pci_set_master(oct->pci_dev);
 792
 793         return 0;
 794 }
 795
 796 /**
 797  * \brief Unmap and free network buffer
 798  * @param buf buffer
 799  */
 800 static void free_netbuf(void *buf)
 801 {
 802         struct octnet_buf_free_info *finfo;
 803         struct sk_buff *skb;
 804         struct lio *lio;
 805
 806         finfo = (struct octnet_buf_free_info *)buf;
 807         skb = finfo->skb;
 808         lio = finfo->lio;
 809
 810         dma_unmap_single(&lio->oct_dev->pci_dev->dev, finfo->dptr, skb->len,
 811                          DMA_TO_DEVICE);
 812
 813         tx_buffer_free(skb);
 814 }
 815
 816 /**
 817  * \brief Unmap and free gather buffer
 818  * @param buf buffer
 819  */
 820 static void free_netsgbuf(void *buf)
 821 {
 822         struct octnet_buf_free_info *finfo;
 823         struct octnic_gather *g;
 824         struct sk_buff *skb;
 825         int i, frags, iq;
 826         struct lio *lio;
 827
 828         finfo = (struct octnet_buf_free_info *)buf;
 829         skb = finfo->skb;
 830         lio = finfo->lio;
 831         g = finfo->g;
 832         frags = skb_shinfo(skb)->nr_frags;
 833
 834         dma_unmap_single(&lio->oct_dev->pci_dev->dev,
 835                          g->sg[0].ptr[0], (skb->len - skb->data_len),
 836                          DMA_TO_DEVICE);
 837
 838         i = 1;
 839         while (frags--) {
 840                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
 841
 842                 pci_unmap_page((lio->oct_dev)->pci_dev,
 843                                g->sg[(i >> 2)].ptr[(i & 3)],
 844                                skb_frag_size(frag), DMA_TO_DEVICE);
 845                 i++;
 846         }
 847
 848         iq = skb_iq(lio->oct_dev, skb);
 849
 850         spin_lock(&lio->glist_lock[iq]);
 851         list_add_tail(&g->list, &lio->glist[iq]);
 852         spin_unlock(&lio->glist_lock[iq]);
 853
 854         tx_buffer_free(skb);
 855 }
 856
 857 /**
 858  * \brief Unmap and free gather buffer with response
 859  * @param buf buffer
 860  */
 861 static void free_netsgbuf_with_resp(void *buf)
 862 {
 863         struct octnet_buf_free_info *finfo;
 864         struct octeon_soft_command *sc;
 865         struct octnic_gather *g;
 866         struct sk_buff *skb;
 867         int i, frags, iq;
 868         struct lio *lio;
 869
 870         sc = (struct octeon_soft_command *)buf;
 871         skb = (struct sk_buff *)sc->callback_arg;
 872         finfo = (struct octnet_buf_free_info *)&skb->cb;
 873
 874         lio = finfo->lio;
 875         g = finfo->g;
 876         frags = skb_shinfo(skb)->nr_frags;
 877
 878         dma_unmap_single(&lio->oct_dev->pci_dev->dev,
 879                          g->sg[0].ptr[0], (skb->len - skb->data_len),
 880                          DMA_TO_DEVICE);
 881
 882         i = 1;
 883         while (frags--) {
 884                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
 885
 886                 pci_unmap_page((lio->oct_dev)->pci_dev,
 887                                g->sg[(i >> 2)].ptr[(i & 3)],
 888                                skb_frag_size(frag), DMA_TO_DEVICE);
 889                 i++;
 890         }
 891
 892         iq = skb_iq(lio->oct_dev, skb);
 893
 894         spin_lock(&lio->glist_lock[iq]);
 895         list_add_tail(&g->list, &lio->glist[iq]);
 896         spin_unlock(&lio->glist_lock[iq]);
 897
 898         /* Don't free the skb yet */
 899 }
 900
 901 /**
 902  * \brief Net device open for LiquidIO
 903  * @param netdev network device
 904  */
 905 static int liquidio_open(struct net_device *netdev)
 906 {
 907         struct lio *lio = GET_LIO(netdev);
 908         struct octeon_device *oct = lio->oct_dev;
 909         struct octeon_device_priv *oct_priv =
 910                 (struct octeon_device_priv *)oct->priv;
 911         struct napi_struct *napi, *n;
 912
 913         if (!oct->props[lio->ifidx].napi_enabled) {
 914                 tasklet_disable(&oct_priv->droq_tasklet);
 915
 916                 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
 917                         napi_enable(napi);
 918
 919                 oct->props[lio->ifidx].napi_enabled = 1;
 920
 921                 oct->droq[0]->ops.poll_mode = 1;
 922         }
 923
 924         ifstate_set(lio, LIO_IFSTATE_RUNNING);
 925
 926         /* Ready for link status updates */
 927         lio->intf_open = 1;
 928
 929         netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
 930         start_txqs(netdev);
 931
 932         INIT_DELAYED_WORK(&lio->stats_wk.work, lio_fetch_stats);
 933         lio->stats_wk.ctxptr = lio;
 934         schedule_delayed_work(&lio->stats_wk.work, msecs_to_jiffies
 935                                         (LIQUIDIO_NDEV_STATS_POLL_TIME_MS));
 936
 937         /* tell Octeon to start forwarding packets to host */
 938         send_rx_ctrl_cmd(lio, 1);
 939
 940         dev_info(&oct->pci_dev->dev, "%s interface is opened\n", netdev->name);
 941
 942         return 0;
 943 }
 944
 945 /**
 946  * \brief Net device stop for LiquidIO
 947  * @param netdev network device
 948  */
 949 static int liquidio_stop(struct net_device *netdev)
 950 {
 951         struct lio *lio = GET_LIO(netdev);
 952         struct octeon_device *oct = lio->oct_dev;
 953         struct octeon_device_priv *oct_priv =
 954                 (struct octeon_device_priv *)oct->priv;
 955         struct napi_struct *napi, *n;
 956
 957         /* tell Octeon to stop forwarding packets to host */
 958         send_rx_ctrl_cmd(lio, 0);
 959
 960         netif_info(lio, ifdown, lio->netdev, "Stopping interface!\n");
 961         /* Inform that netif carrier is down */
 962         lio->intf_open = 0;
 963         lio->linfo.link.s.link_up = 0;
 964
 965         netif_carrier_off(netdev);
 966         lio->link_changes++;
 967
 968         ifstate_reset(lio, LIO_IFSTATE_RUNNING);
 969
 970         stop_txqs(netdev);
 971
 972         /* Wait for any pending Rx descriptors */
 973         if (lio_wait_for_clean_oq(oct))
 974                 netif_info(lio, rx_err, lio->netdev,
 975                            "Proceeding with stop interface after partial RX desc processing\n");
 976
 977         if (oct->props[lio->ifidx].napi_enabled == 1) {
 978                 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
 979                         napi_disable(napi);
 980
 981                 oct->props[lio->ifidx].napi_enabled = 0;
 982
 983                 oct->droq[0]->ops.poll_mode = 0;
 984
 985                 tasklet_enable(&oct_priv->droq_tasklet);
 986         }
 987
 988         cancel_delayed_work_sync(&lio->stats_wk.work);
 989
 990         dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
 991
 992         return 0;
 993 }
 994
 995 /**
 996  * \brief Converts a mask based on net device flags
 997  * @param netdev network device
 998  *
 999  * This routine generates a octnet_ifflags mask from the net device flags
1000  * received from the OS.
1001  */
1002 static enum octnet_ifflags get_new_flags(struct net_device *netdev)
1003 {
1004         enum octnet_ifflags f = OCTNET_IFFLAG_UNICAST;
1005
1006         if (netdev->flags & IFF_PROMISC)
1007                 f |= OCTNET_IFFLAG_PROMISC;
1008
1009         if (netdev->flags & IFF_ALLMULTI)
1010                 f |= OCTNET_IFFLAG_ALLMULTI;
1011
1012         if (netdev->flags & IFF_MULTICAST) {
1013                 f |= OCTNET_IFFLAG_MULTICAST;
1014
1015                 /* Accept all multicast addresses if there are more than we
1016                  * can handle
1017                  */
1018                 if (netdev_mc_count(netdev) > MAX_OCTEON_MULTICAST_ADDR)
1019                         f |= OCTNET_IFFLAG_ALLMULTI;
1020         }
1021
1022         if (netdev->flags & IFF_BROADCAST)
1023                 f |= OCTNET_IFFLAG_BROADCAST;
1024
1025         return f;
1026 }
1027
1028 static void liquidio_set_uc_list(struct net_device *netdev)
1029 {
1030         struct lio *lio = GET_LIO(netdev);
1031         struct octeon_device *oct = lio->oct_dev;
1032         struct octnic_ctrl_pkt nctrl;
1033         struct netdev_hw_addr *ha;
1034         u64 *mac;
1035
1036         if (lio->netdev_uc_count == netdev_uc_count(netdev))
1037                 return;
1038
1039         if (netdev_uc_count(netdev) > MAX_NCTRL_UDD) {
1040                 dev_err(&oct->pci_dev->dev, "too many MAC addresses in netdev uc list\n");
1041                 return;
1042         }
1043
1044         lio->netdev_uc_count = netdev_uc_count(netdev);
1045
1046         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1047         nctrl.ncmd.s.cmd = OCTNET_CMD_SET_UC_LIST;
1048         nctrl.ncmd.s.more = lio->netdev_uc_count;
1049         nctrl.ncmd.s.param1 = oct->vf_num;
1050         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1051         nctrl.netpndev = (u64)netdev;
1052         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1053
1054         /* copy all the addresses into the udd */
1055         mac = &nctrl.udd[0];
1056         netdev_for_each_uc_addr(ha, netdev) {
1057                 ether_addr_copy(((u8 *)mac) + 2, ha->addr);
1058                 mac++;
1059         }
1060
1061         octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1062 }
1063
1064 /**
1065  * \brief Net device set_multicast_list
1066  * @param netdev network device
1067  */
1068 static void liquidio_set_mcast_list(struct net_device *netdev)
1069 {
1070         int mc_count = min(netdev_mc_count(netdev), MAX_OCTEON_MULTICAST_ADDR);
1071         struct lio *lio = GET_LIO(netdev);
1072         struct octeon_device *oct = lio->oct_dev;
1073         struct octnic_ctrl_pkt nctrl;
1074         struct netdev_hw_addr *ha;
1075         u64 *mc;
1076         int ret;
1077
1078         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1079
1080         /* Create a ctrl pkt command to be sent to core app. */
1081         nctrl.ncmd.u64 = 0;
1082         nctrl.ncmd.s.cmd = OCTNET_CMD_SET_MULTI_LIST;
1083         nctrl.ncmd.s.param1 = get_new_flags(netdev);
1084         nctrl.ncmd.s.param2 = mc_count;
1085         nctrl.ncmd.s.more = mc_count;
1086         nctrl.netpndev = (u64)netdev;
1087         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1088
1089         /* copy all the addresses into the udd */
1090         mc = &nctrl.udd[0];
1091         netdev_for_each_mc_addr(ha, netdev) {
1092                 *mc = 0;
1093                 ether_addr_copy(((u8 *)mc) + 2, ha->addr);
1094                 /* no need to swap bytes */
1095                 if (++mc > &nctrl.udd[mc_count])
1096                         break;
1097         }
1098
1099         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1100
1101         /* Apparently, any activity in this call from the kernel has to
1102          * be atomic. So we won't wait for response.
1103          */
1104
1105         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1106         if (ret) {
1107                 dev_err(&oct->pci_dev->dev, "DEVFLAGS change failed in core (ret: 0x%x)\n",
1108                         ret);
1109         }
1110
1111         liquidio_set_uc_list(netdev);
1112 }
1113
1114 /**
1115  * \brief Net device set_mac_address
1116  * @param netdev network device
1117  */
1118 static int liquidio_set_mac(struct net_device *netdev, void *p)
1119 {
1120         struct sockaddr *addr = (struct sockaddr *)p;
1121         struct lio *lio = GET_LIO(netdev);
1122         struct octeon_device *oct = lio->oct_dev;
1123         struct octnic_ctrl_pkt nctrl;
1124         int ret = 0;
1125
1126         if (!is_valid_ether_addr(addr->sa_data))
1127                 return -EADDRNOTAVAIL;
1128
1129         if (ether_addr_equal(addr->sa_data, netdev->dev_addr))
1130                 return 0;
1131
1132         if (lio->linfo.macaddr_is_admin_asgnd)
1133                 return -EPERM;
1134
1135         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1136
1137         nctrl.ncmd.u64 = 0;
1138         nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
1139         nctrl.ncmd.s.param1 = 0;
1140         nctrl.ncmd.s.more = 1;
1141         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1142         nctrl.netpndev = (u64)netdev;
1143
1144         nctrl.udd[0] = 0;
1145         /* The MAC Address is presented in network byte order. */
1146         ether_addr_copy((u8 *)&nctrl.udd[0] + 2, addr->sa_data);
1147
1148         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1149         if (ret < 0) {
1150                 dev_err(&oct->pci_dev->dev, "MAC Address change failed\n");
1151                 return -ENOMEM;
1152         }
1153
1154         if (nctrl.sc_status ==
1155             FIRMWARE_STATUS_CODE(OCTEON_REQUEST_NO_PERMISSION)) {
1156                 dev_err(&oct->pci_dev->dev, "MAC Address change failed: no permission\n");
1157                 return -EPERM;
1158         }
1159
1160         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1161         ether_addr_copy(((u8 *)&lio->linfo.hw_addr) + 2, addr->sa_data);
1162
1163         return 0;
1164 }
1165
1166 static void
1167 liquidio_get_stats64(struct net_device *netdev,
1168                      struct rtnl_link_stats64 *lstats)
1169 {
1170         struct lio *lio = GET_LIO(netdev);
1171         struct octeon_device *oct;
1172         u64 pkts = 0, drop = 0, bytes = 0;
1173         struct oct_droq_stats *oq_stats;
1174         struct oct_iq_stats *iq_stats;
1175         int i, iq_no, oq_no;
1176
1177         oct = lio->oct_dev;
1178
1179         if (ifstate_check(lio, LIO_IFSTATE_RESETTING))
1180                 return;
1181
1182         for (i = 0; i < oct->num_iqs; i++) {
1183                 iq_no = lio->linfo.txpciq[i].s.q_no;
1184                 iq_stats = &oct->instr_queue[iq_no]->stats;
1185                 pkts += iq_stats->tx_done;
1186                 drop += iq_stats->tx_dropped;
1187                 bytes += iq_stats->tx_tot_bytes;
1188         }
1189
1190         lstats->tx_packets = pkts;
1191         lstats->tx_bytes = bytes;
1192         lstats->tx_dropped = drop;
1193
1194         pkts = 0;
1195         drop = 0;
1196         bytes = 0;
1197
1198         for (i = 0; i < oct->num_oqs; i++) {
1199                 oq_no = lio->linfo.rxpciq[i].s.q_no;
1200                 oq_stats = &oct->droq[oq_no]->stats;
1201                 pkts += oq_stats->rx_pkts_received;
1202                 drop += (oq_stats->rx_dropped +
1203                          oq_stats->dropped_nodispatch +
1204                          oq_stats->dropped_toomany +
1205                          oq_stats->dropped_nomem);
1206                 bytes += oq_stats->rx_bytes_received;
1207         }
1208
1209         lstats->rx_bytes = bytes;
1210         lstats->rx_packets = pkts;
1211         lstats->rx_dropped = drop;
1212
1213         lstats->multicast = oct->link_stats.fromwire.fw_total_mcast;
1214
1215         /* detailed rx_errors: */
1216         lstats->rx_length_errors = oct->link_stats.fromwire.l2_err;
1217         /* recved pkt with crc error */
1218         lstats->rx_crc_errors = oct->link_stats.fromwire.fcs_err;
1219         /* recv'd frame alignment error */
1220         lstats->rx_frame_errors = oct->link_stats.fromwire.frame_err;
1221
1222         lstats->rx_errors = lstats->rx_length_errors + lstats->rx_crc_errors +
1223                             lstats->rx_frame_errors;
1224
1225         /* detailed tx_errors */
1226         lstats->tx_aborted_errors = oct->link_stats.fromhost.fw_err_pko;
1227         lstats->tx_carrier_errors = oct->link_stats.fromhost.fw_err_link;
1228
1229         lstats->tx_errors = lstats->tx_aborted_errors +
1230                 lstats->tx_carrier_errors;
1231 }
1232
1233 /**
1234  * \brief Handler for SIOCSHWTSTAMP ioctl
1235  * @param netdev network device
1236  * @param ifr interface request
1237  * @param cmd command
1238  */
1239 static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
1240 {
1241         struct lio *lio = GET_LIO(netdev);
1242         struct hwtstamp_config conf;
1243
1244         if (copy_from_user(&conf, ifr->ifr_data, sizeof(conf)))
1245                 return -EFAULT;
1246
1247         if (conf.flags)
1248                 return -EINVAL;
1249
1250         switch (conf.tx_type) {
1251         case HWTSTAMP_TX_ON:
1252         case HWTSTAMP_TX_OFF:
1253                 break;
1254         default:
1255                 return -ERANGE;
1256         }
1257
1258         switch (conf.rx_filter) {
1259         case HWTSTAMP_FILTER_NONE:
1260                 break;
1261         case HWTSTAMP_FILTER_ALL:
1262         case HWTSTAMP_FILTER_SOME:
1263         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1264         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1265         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1266         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1267         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1268         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1269         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1270         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1271         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1272         case HWTSTAMP_FILTER_PTP_V2_EVENT:
1273         case HWTSTAMP_FILTER_PTP_V2_SYNC:
1274         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1275         case HWTSTAMP_FILTER_NTP_ALL:
1276                 conf.rx_filter = HWTSTAMP_FILTER_ALL;
1277                 break;
1278         default:
1279                 return -ERANGE;
1280         }
1281
1282         if (conf.rx_filter == HWTSTAMP_FILTER_ALL)
1283                 ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1284
1285         else
1286                 ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1287
1288         return copy_to_user(ifr->ifr_data, &conf, sizeof(conf)) ? -EFAULT : 0;
1289 }
1290
1291 /**
1292  * \brief ioctl handler
1293  * @param netdev network device
1294  * @param ifr interface request
1295  * @param cmd command
1296  */
1297 static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1298 {
1299         switch (cmd) {
1300         case SIOCSHWTSTAMP:
1301                 return hwtstamp_ioctl(netdev, ifr);
1302         default:
1303                 return -EOPNOTSUPP;
1304         }
1305 }
1306
1307 static void handle_timestamp(struct octeon_device *oct, u32 status, void *buf)
1308 {
1309         struct sk_buff *skb = (struct sk_buff *)buf;
1310         struct octnet_buf_free_info *finfo;
1311         struct oct_timestamp_resp *resp;
1312         struct octeon_soft_command *sc;
1313         struct lio *lio;
1314
1315         finfo = (struct octnet_buf_free_info *)skb->cb;
1316         lio = finfo->lio;
1317         sc = finfo->sc;
1318         oct = lio->oct_dev;
1319         resp = (struct oct_timestamp_resp *)sc->virtrptr;
1320
1321         if (status != OCTEON_REQUEST_DONE) {
1322                 dev_err(&oct->pci_dev->dev, "Tx timestamp instruction failed. Status: %llx\n",
1323                         CVM_CAST64(status));
1324                 resp->timestamp = 0;
1325         }
1326
1327         octeon_swap_8B_data(&resp->timestamp, 1);
1328
1329         if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
1330                 struct skb_shared_hwtstamps ts;
1331                 u64 ns = resp->timestamp;
1332
1333                 netif_info(lio, tx_done, lio->netdev,
1334                            "Got resulting SKBTX_HW_TSTAMP skb=%p ns=%016llu\n",
1335                            skb, (unsigned long long)ns);
1336                 ts.hwtstamp = ns_to_ktime(ns + lio->ptp_adjust);
1337                 skb_tstamp_tx(skb, &ts);
1338         }
1339
1340         octeon_free_soft_command(oct, sc);
1341         tx_buffer_free(skb);
1342 }
1343
1344 /* \brief Send a data packet that will be timestamped
1345  * @param oct octeon device
1346  * @param ndata pointer to network data
1347  * @param finfo pointer to private network data
1348  */
1349 static int send_nic_timestamp_pkt(struct octeon_device *oct,
1350                                   struct octnic_data_pkt *ndata,
1351                                   struct octnet_buf_free_info *finfo,
1352                                   int xmit_more)
1353 {
1354         struct octeon_soft_command *sc;
1355         int ring_doorbell;
1356         struct lio *lio;
1357         int retval;
1358         u32 len;
1359
1360         lio = finfo->lio;
1361
1362         sc = octeon_alloc_soft_command_resp(oct, &ndata->cmd,
1363                                             sizeof(struct oct_timestamp_resp));
1364         finfo->sc = sc;
1365
1366         if (!sc) {
1367                 dev_err(&oct->pci_dev->dev, "No memory for timestamped data packet\n");
1368                 return IQ_SEND_FAILED;
1369         }
1370
1371         if (ndata->reqtype == REQTYPE_NORESP_NET)
1372                 ndata->reqtype = REQTYPE_RESP_NET;
1373         else if (ndata->reqtype == REQTYPE_NORESP_NET_SG)
1374                 ndata->reqtype = REQTYPE_RESP_NET_SG;
1375
1376         sc->callback = handle_timestamp;
1377         sc->callback_arg = finfo->skb;
1378         sc->iq_no = ndata->q_no;
1379
1380         len = (u32)((struct octeon_instr_ih3 *)(&sc->cmd.cmd3.ih3))->dlengsz;
1381
1382         ring_doorbell = !xmit_more;
1383
1384         retval = octeon_send_command(oct, sc->iq_no, ring_doorbell, &sc->cmd,
1385                                      sc, len, ndata->reqtype);
1386
1387         if (retval == IQ_SEND_FAILED) {
1388                 dev_err(&oct->pci_dev->dev, "timestamp data packet failed status: %x\n",
1389                         retval);
1390                 octeon_free_soft_command(oct, sc);
1391         } else {
1392                 netif_info(lio, tx_queued, lio->netdev, "Queued timestamp packet\n");
1393         }
1394
1395         return retval;
1396 }
1397
1398 /** \brief Transmit networks packets to the Octeon interface
1399  * @param skbuff   skbuff struct to be passed to network layer.
1400  * @param netdev   pointer to network device
1401  * @returns whether the packet was transmitted to the device okay or not
1402  *             (NETDEV_TX_OK or NETDEV_TX_BUSY)
1403  */
1404 static netdev_tx_t liquidio_xmit(struct sk_buff *skb, struct net_device *netdev)
1405 {
1406         struct octnet_buf_free_info *finfo;
1407         union octnic_cmd_setup cmdsetup;
1408         struct octnic_data_pkt ndata;
1409         struct octeon_instr_irh *irh;
1410         struct oct_iq_stats *stats;
1411         struct octeon_device *oct;
1412         int q_idx = 0, iq_no = 0;
1413         union tx_info *tx_info;
1414         int xmit_more = 0;
1415         struct lio *lio;
1416         int status = 0;
1417         u64 dptr = 0;
1418         u32 tag = 0;
1419         int j;
1420
1421         lio = GET_LIO(netdev);
1422         oct = lio->oct_dev;
1423
1424         q_idx = skb_iq(lio->oct_dev, skb);
1425         tag = q_idx;
1426         iq_no = lio->linfo.txpciq[q_idx].s.q_no;
1427
1428         stats = &oct->instr_queue[iq_no]->stats;
1429
1430         /* Check for all conditions in which the current packet cannot be
1431          * transmitted.
1432          */
1433         if (!(atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING) ||
1434             (!lio->linfo.link.s.link_up) || (skb->len <= 0)) {
1435                 netif_info(lio, tx_err, lio->netdev, "Transmit failed link_status : %d\n",
1436                            lio->linfo.link.s.link_up);
1437                 goto lio_xmit_failed;
1438         }
1439
1440         /* Use space in skb->cb to store info used to unmap and
1441          * free the buffers.
1442          */
1443         finfo = (struct octnet_buf_free_info *)skb->cb;
1444         finfo->lio = lio;
1445         finfo->skb = skb;
1446         finfo->sc = NULL;
1447
1448         /* Prepare the attributes for the data to be passed to OSI. */
1449         memset(&ndata, 0, sizeof(struct octnic_data_pkt));
1450
1451         ndata.buf = finfo;
1452
1453         ndata.q_no = iq_no;
1454
1455         if (octnet_iq_is_full(oct, ndata.q_no)) {
1456                 /* defer sending if queue is full */
1457                 netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
1458                            ndata.q_no);
1459                 stats->tx_iq_busy++;
1460                 return NETDEV_TX_BUSY;
1461         }
1462
1463         ndata.datasize = skb->len;
1464
1465         cmdsetup.u64 = 0;
1466         cmdsetup.s.iq_no = iq_no;
1467
1468         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1469                 if (skb->encapsulation) {
1470                         cmdsetup.s.tnl_csum = 1;
1471                         stats->tx_vxlan++;
1472                 } else {
1473                         cmdsetup.s.transport_csum = 1;
1474                 }
1475         }
1476         if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
1477                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1478                 cmdsetup.s.timestamp = 1;
1479         }
1480
1481         if (!skb_shinfo(skb)->nr_frags) {
1482                 cmdsetup.s.u.datasize = skb->len;
1483                 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1484                 /* Offload checksum calculation for TCP/UDP packets */
1485                 dptr = dma_map_single(&oct->pci_dev->dev,
1486                                       skb->data,
1487                                       skb->len,
1488                                       DMA_TO_DEVICE);
1489                 if (dma_mapping_error(&oct->pci_dev->dev, dptr)) {
1490                         dev_err(&oct->pci_dev->dev, "%s DMA mapping error 1\n",
1491                                 __func__);
1492                         return NETDEV_TX_BUSY;
1493                 }
1494
1495                 ndata.cmd.cmd3.dptr = dptr;
1496                 finfo->dptr = dptr;
1497                 ndata.reqtype = REQTYPE_NORESP_NET;
1498
1499         } else {
1500                 skb_frag_t *frag;
1501                 struct octnic_gather *g;
1502                 int i, frags;
1503
1504                 spin_lock(&lio->glist_lock[q_idx]);
1505                 g = (struct octnic_gather *)
1506                         lio_list_delete_head(&lio->glist[q_idx]);
1507                 spin_unlock(&lio->glist_lock[q_idx]);
1508
1509                 if (!g) {
1510                         netif_info(lio, tx_err, lio->netdev,
1511                                    "Transmit scatter gather: glist null!\n");
1512                         goto lio_xmit_failed;
1513                 }
1514
1515                 cmdsetup.s.gather = 1;
1516                 cmdsetup.s.u.gatherptrs = (skb_shinfo(skb)->nr_frags + 1);
1517                 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1518
1519                 memset(g->sg, 0, g->sg_size);
1520
1521                 g->sg[0].ptr[0] = dma_map_single(&oct->pci_dev->dev,
1522                                                  skb->data,
1523                                                  (skb->len - skb->data_len),
1524                                                  DMA_TO_DEVICE);
1525                 if (dma_mapping_error(&oct->pci_dev->dev, g->sg[0].ptr[0])) {
1526                         dev_err(&oct->pci_dev->dev, "%s DMA mapping error 2\n",
1527                                 __func__);
1528                         return NETDEV_TX_BUSY;
1529                 }
1530                 add_sg_size(&g->sg[0], (skb->len - skb->data_len), 0);
1531
1532                 frags = skb_shinfo(skb)->nr_frags;
1533                 i = 1;
1534                 while (frags--) {
1535                         frag = &skb_shinfo(skb)->frags[i - 1];
1536
1537                         g->sg[(i >> 2)].ptr[(i & 3)] =
1538                                 skb_frag_dma_map(&oct->pci_dev->dev,
1539                                                  frag, 0, skb_frag_size(frag),
1540                                                  DMA_TO_DEVICE);
1541                         if (dma_mapping_error(&oct->pci_dev->dev,
1542                                               g->sg[i >> 2].ptr[i & 3])) {
1543                                 dma_unmap_single(&oct->pci_dev->dev,
1544                                                  g->sg[0].ptr[0],
1545                                                  skb->len - skb->data_len,
1546                                                  DMA_TO_DEVICE);
1547                                 for (j = 1; j < i; j++) {
1548                                         frag = &skb_shinfo(skb)->frags[j - 1];
1549                                         dma_unmap_page(&oct->pci_dev->dev,
1550                                                        g->sg[j >> 2].ptr[j & 3],
1551                                                        skb_frag_size(frag),
1552                                                        DMA_TO_DEVICE);
1553                                 }
1554                                 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 3\n",
1555                                         __func__);
1556                                 return NETDEV_TX_BUSY;
1557                         }
1558
1559                         add_sg_size(&g->sg[(i >> 2)], skb_frag_size(frag),
1560                                     (i & 3));
1561                         i++;
1562                 }
1563
1564                 dptr = g->sg_dma_ptr;
1565
1566                 ndata.cmd.cmd3.dptr = dptr;
1567                 finfo->dptr = dptr;
1568                 finfo->g = g;
1569
1570                 ndata.reqtype = REQTYPE_NORESP_NET_SG;
1571         }
1572
1573         irh = (struct octeon_instr_irh *)&ndata.cmd.cmd3.irh;
1574         tx_info = (union tx_info *)&ndata.cmd.cmd3.ossp[0];
1575
1576         if (skb_shinfo(skb)->gso_size) {
1577                 tx_info->s.gso_size = skb_shinfo(skb)->gso_size;
1578                 tx_info->s.gso_segs = skb_shinfo(skb)->gso_segs;
1579         }
1580
1581         /* HW insert VLAN tag */
1582         if (skb_vlan_tag_present(skb)) {
1583                 irh->priority = skb_vlan_tag_get(skb) >> VLAN_PRIO_SHIFT;
1584                 irh->vlan = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
1585         }
1586
1587         xmit_more = netdev_xmit_more();
1588
1589         if (unlikely(cmdsetup.s.timestamp))
1590                 status = send_nic_timestamp_pkt(oct, &ndata, finfo, xmit_more);
1591         else
1592                 status = octnet_send_nic_data_pkt(oct, &ndata, xmit_more);
1593         if (status == IQ_SEND_FAILED)
1594                 goto lio_xmit_failed;
1595
1596         netif_info(lio, tx_queued, lio->netdev, "Transmit queued successfully\n");
1597
1598         if (status == IQ_SEND_STOP) {
1599                 dev_err(&oct->pci_dev->dev, "Rcvd IQ_SEND_STOP signal; stopping IQ-%d\n",
1600                         iq_no);
1601                 netif_stop_subqueue(netdev, q_idx);
1602         }
1603
1604         netif_trans_update(netdev);
1605
1606         if (tx_info->s.gso_segs)
1607                 stats->tx_done += tx_info->s.gso_segs;
1608         else
1609                 stats->tx_done++;
1610         stats->tx_tot_bytes += ndata.datasize;
1611
1612         return NETDEV_TX_OK;
1613
1614 lio_xmit_failed:
1615         stats->tx_dropped++;
1616         netif_info(lio, tx_err, lio->netdev, "IQ%d Transmit dropped:%llu\n",
1617                    iq_no, stats->tx_dropped);
1618         if (dptr)
1619                 dma_unmap_single(&oct->pci_dev->dev, dptr,
1620                                  ndata.datasize, DMA_TO_DEVICE);
1621
1622         octeon_ring_doorbell_locked(oct, iq_no);
1623
1624         tx_buffer_free(skb);
1625         return NETDEV_TX_OK;
1626 }
1627
1628 /** \brief Network device Tx timeout
1629  * @param netdev    pointer to network device
1630  */
1631 static void liquidio_tx_timeout(struct net_device *netdev)
1632 {
1633         struct lio *lio;
1634
1635         lio = GET_LIO(netdev);
1636
1637         netif_info(lio, tx_err, lio->netdev,
1638                    "Transmit timeout tx_dropped:%ld, waking up queues now!!\n",
1639                    netdev->stats.tx_dropped);
1640         netif_trans_update(netdev);
1641         wake_txqs(netdev);
1642 }
1643
1644 static int
1645 liquidio_vlan_rx_add_vid(struct net_device *netdev,
1646                          __be16 proto __attribute__((unused)), u16 vid)
1647 {
1648         struct lio *lio = GET_LIO(netdev);
1649         struct octeon_device *oct = lio->oct_dev;
1650         struct octnic_ctrl_pkt nctrl;
1651         int ret = 0;
1652
1653         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1654
1655         nctrl.ncmd.u64 = 0;
1656         nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
1657         nctrl.ncmd.s.param1 = vid;
1658         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1659         nctrl.netpndev = (u64)netdev;
1660         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1661
1662         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1663         if (ret) {
1664                 dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
1665                         ret);
1666                 return -EPERM;
1667         }
1668
1669         return 0;
1670 }
1671
1672 static int
1673 liquidio_vlan_rx_kill_vid(struct net_device *netdev,
1674                           __be16 proto __attribute__((unused)), u16 vid)
1675 {
1676         struct lio *lio = GET_LIO(netdev);
1677         struct octeon_device *oct = lio->oct_dev;
1678         struct octnic_ctrl_pkt nctrl;
1679         int ret = 0;
1680
1681         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1682
1683         nctrl.ncmd.u64 = 0;
1684         nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;
1685         nctrl.ncmd.s.param1 = vid;
1686         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1687         nctrl.netpndev = (u64)netdev;
1688         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1689
1690         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1691         if (ret) {
1692                 dev_err(&oct->pci_dev->dev, "Del VLAN filter failed in core (ret: 0x%x)\n",
1693                         ret);
1694                 if (ret > 0)
1695                         ret = -EIO;
1696         }
1697         return ret;
1698 }
1699
1700 /** Sending command to enable/disable RX checksum offload
1701  * @param netdev                pointer to network device
1702  * @param command               OCTNET_CMD_TNL_RX_CSUM_CTL
1703  * @param rx_cmd_bit            OCTNET_CMD_RXCSUM_ENABLE/
1704  *                              OCTNET_CMD_RXCSUM_DISABLE
1705  * @returns                     SUCCESS or FAILURE
1706  */
1707 static int liquidio_set_rxcsum_command(struct net_device *netdev, int command,
1708                                        u8 rx_cmd)
1709 {
1710         struct lio *lio = GET_LIO(netdev);
1711         struct octeon_device *oct = lio->oct_dev;
1712         struct octnic_ctrl_pkt nctrl;
1713         int ret = 0;
1714
1715         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1716
1717         nctrl.ncmd.u64 = 0;
1718         nctrl.ncmd.s.cmd = command;
1719         nctrl.ncmd.s.param1 = rx_cmd;
1720         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1721         nctrl.netpndev = (u64)netdev;
1722         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1723
1724         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1725         if (ret) {
1726                 dev_err(&oct->pci_dev->dev, "DEVFLAGS RXCSUM change failed in core (ret:0x%x)\n",
1727                         ret);
1728                 if (ret > 0)
1729                         ret = -EIO;
1730         }
1731         return ret;
1732 }
1733
1734 /** Sending command to add/delete VxLAN UDP port to firmware
1735  * @param netdev                pointer to network device
1736  * @param command               OCTNET_CMD_VXLAN_PORT_CONFIG
1737  * @param vxlan_port            VxLAN port to be added or deleted
1738  * @param vxlan_cmd_bit         OCTNET_CMD_VXLAN_PORT_ADD,
1739  *                              OCTNET_CMD_VXLAN_PORT_DEL
1740  * @returns                     SUCCESS or FAILURE
1741  */
1742 static int liquidio_vxlan_port_command(struct net_device *netdev, int command,
1743                                        u16 vxlan_port, u8 vxlan_cmd_bit)
1744 {
1745         struct lio *lio = GET_LIO(netdev);
1746         struct octeon_device *oct = lio->oct_dev;
1747         struct octnic_ctrl_pkt nctrl;
1748         int ret = 0;
1749
1750         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1751
1752         nctrl.ncmd.u64 = 0;
1753         nctrl.ncmd.s.cmd = command;
1754         nctrl.ncmd.s.more = vxlan_cmd_bit;
1755         nctrl.ncmd.s.param1 = vxlan_port;
1756         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1757         nctrl.netpndev = (u64)netdev;
1758         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1759
1760         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1761         if (ret) {
1762                 dev_err(&oct->pci_dev->dev,
1763                         "DEVFLAGS VxLAN port add/delete failed in core (ret : 0x%x)\n",
1764                         ret);
1765                 if (ret > 0)
1766                         ret = -EIO;
1767         }
1768         return ret;
1769 }
1770
1771 /** \brief Net device fix features
1772  * @param netdev  pointer to network device
1773  * @param request features requested
1774  * @returns updated features list
1775  */
1776 static netdev_features_t liquidio_fix_features(struct net_device *netdev,
1777                                                netdev_features_t request)
1778 {
1779         struct lio *lio = netdev_priv(netdev);
1780
1781         if ((request & NETIF_F_RXCSUM) &&
1782             !(lio->dev_capability & NETIF_F_RXCSUM))
1783                 request &= ~NETIF_F_RXCSUM;
1784
1785         if ((request & NETIF_F_HW_CSUM) &&
1786             !(lio->dev_capability & NETIF_F_HW_CSUM))
1787                 request &= ~NETIF_F_HW_CSUM;
1788
1789         if ((request & NETIF_F_TSO) && !(lio->dev_capability & NETIF_F_TSO))
1790                 request &= ~NETIF_F_TSO;
1791
1792         if ((request & NETIF_F_TSO6) && !(lio->dev_capability & NETIF_F_TSO6))
1793                 request &= ~NETIF_F_TSO6;
1794
1795         if ((request & NETIF_F_LRO) && !(lio->dev_capability & NETIF_F_LRO))
1796                 request &= ~NETIF_F_LRO;
1797
1798         /* Disable LRO if RXCSUM is off */
1799         if (!(request & NETIF_F_RXCSUM) && (netdev->features & NETIF_F_LRO) &&
1800             (lio->dev_capability & NETIF_F_LRO))
1801                 request &= ~NETIF_F_LRO;
1802
1803         return request;
1804 }
1805
1806 /** \brief Net device set features
1807  * @param netdev  pointer to network device
1808  * @param features features to enable/disable
1809  */
1810 static int liquidio_set_features(struct net_device *netdev,
1811                                  netdev_features_t features)
1812 {
1813         struct lio *lio = netdev_priv(netdev);
1814
1815         if (!((netdev->features ^ features) & NETIF_F_LRO))
1816                 return 0;
1817
1818         if ((features & NETIF_F_LRO) && (lio->dev_capability & NETIF_F_LRO))
1819                 liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
1820                                      OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1821         else if (!(features & NETIF_F_LRO) &&
1822                  (lio->dev_capability & NETIF_F_LRO))
1823                 liquidio_set_feature(netdev, OCTNET_CMD_LRO_DISABLE,
1824                                      OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1825         if (!(netdev->features & NETIF_F_RXCSUM) &&
1826             (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1827             (features & NETIF_F_RXCSUM))
1828                 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1829                                             OCTNET_CMD_RXCSUM_ENABLE);
1830         else if ((netdev->features & NETIF_F_RXCSUM) &&
1831                  (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1832                  !(features & NETIF_F_RXCSUM))
1833                 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1834                                             OCTNET_CMD_RXCSUM_DISABLE);
1835
1836         return 0;
1837 }
1838
1839 static void liquidio_add_vxlan_port(struct net_device *netdev,
1840                                     struct udp_tunnel_info *ti)
1841 {
1842         if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
1843                 return;
1844
1845         liquidio_vxlan_port_command(netdev,
1846                                     OCTNET_CMD_VXLAN_PORT_CONFIG,
1847                                     htons(ti->port),
1848                                     OCTNET_CMD_VXLAN_PORT_ADD);
1849 }
1850
1851 static void liquidio_del_vxlan_port(struct net_device *netdev,
1852                                     struct udp_tunnel_info *ti)
1853 {
1854         if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
1855                 return;
1856
1857         liquidio_vxlan_port_command(netdev,
1858                                     OCTNET_CMD_VXLAN_PORT_CONFIG,
1859                                     htons(ti->port),
1860                                     OCTNET_CMD_VXLAN_PORT_DEL);
1861 }
1862
1863 static const struct net_device_ops lionetdevops = {
1864         .ndo_open               = liquidio_open,
1865         .ndo_stop               = liquidio_stop,
1866         .ndo_start_xmit         = liquidio_xmit,
1867         .ndo_get_stats64        = liquidio_get_stats64,
1868         .ndo_set_mac_address    = liquidio_set_mac,
1869         .ndo_set_rx_mode        = liquidio_set_mcast_list,
1870         .ndo_tx_timeout         = liquidio_tx_timeout,
1871         .ndo_vlan_rx_add_vid    = liquidio_vlan_rx_add_vid,
1872         .ndo_vlan_rx_kill_vid   = liquidio_vlan_rx_kill_vid,
1873         .ndo_change_mtu         = liquidio_change_mtu,
1874         .ndo_do_ioctl           = liquidio_ioctl,
1875         .ndo_fix_features       = liquidio_fix_features,
1876         .ndo_set_features       = liquidio_set_features,
1877         .ndo_udp_tunnel_add     = liquidio_add_vxlan_port,
1878         .ndo_udp_tunnel_del     = liquidio_del_vxlan_port,
1879 };
1880
1881 static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
1882 {
1883         struct octeon_device *oct = (struct octeon_device *)buf;
1884         struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
1885         union oct_link_status *ls;
1886         int gmxport = 0;
1887         int i;
1888
1889         if (recv_pkt->buffer_size[0] != (sizeof(*ls) + OCT_DROQ_INFO_SIZE)) {
1890                 dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
1891                         recv_pkt->buffer_size[0],
1892                         recv_pkt->rh.r_nic_info.gmxport);
1893                 goto nic_info_err;
1894         }
1895
1896         gmxport = recv_pkt->rh.r_nic_info.gmxport;
1897         ls = (union oct_link_status *)(get_rbd(recv_pkt->buffer_ptr[0]) +
1898                 OCT_DROQ_INFO_SIZE);
1899
1900         octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
1901
1902         for (i = 0; i < oct->ifcount; i++) {
1903                 if (oct->props[i].gmxport == gmxport) {
1904                         update_link_status(oct->props[i].netdev, ls);
1905                         break;
1906                 }
1907         }
1908
1909 nic_info_err:
1910         for (i = 0; i < recv_pkt->buffer_count; i++)
1911                 recv_buffer_free(recv_pkt->buffer_ptr[i]);
1912         octeon_free_recv_info(recv_info);
1913         return 0;
1914 }
1915
1916 /**
1917  * \brief Setup network interfaces
1918  * @param octeon_dev  octeon device
1919  *
1920  * Called during init time for each device. It assumes the NIC
1921  * is already up and running.  The link information for each
1922  * interface is passed in link_info.
1923  */
1924 static int setup_nic_devices(struct octeon_device *octeon_dev)
1925 {
1926         int retval, num_iqueues, num_oqueues;
1927         u32 resp_size, data_size;
1928         struct liquidio_if_cfg_resp *resp;
1929         struct octeon_soft_command *sc;
1930         union oct_nic_if_cfg if_cfg;
1931         struct octdev_props *props;
1932         struct net_device *netdev;
1933         struct lio_version *vdata;
1934         struct lio *lio = NULL;
1935         u8 mac[ETH_ALEN], i, j;
1936         u32 ifidx_or_pfnum;
1937
1938         ifidx_or_pfnum = octeon_dev->pf_num;
1939
1940         /* This is to handle link status changes */
1941         octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC, OPCODE_NIC_INFO,
1942                                     lio_nic_info, octeon_dev);
1943
1944         /* REQTYPE_RESP_NET and REQTYPE_SOFT_COMMAND do not have free functions.
1945          * They are handled directly.
1946          */
1947         octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET,
1948                                         free_netbuf);
1949
1950         octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET_SG,
1951                                         free_netsgbuf);
1952
1953         octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_RESP_NET_SG,
1954                                         free_netsgbuf_with_resp);
1955
1956         for (i = 0; i < octeon_dev->ifcount; i++) {
1957                 resp_size = sizeof(struct liquidio_if_cfg_resp);
1958                 data_size = sizeof(struct lio_version);
1959                 sc = (struct octeon_soft_command *)
1960                         octeon_alloc_soft_command(octeon_dev, data_size,
1961                                                   resp_size, 0);
1962                 resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
1963                 vdata = (struct lio_version *)sc->virtdptr;
1964
1965                 *((u64 *)vdata) = 0;
1966                 vdata->major = cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
1967                 vdata->minor = cpu_to_be16(LIQUIDIO_BASE_MINOR_VERSION);
1968                 vdata->micro = cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);
1969
1970                 if_cfg.u64 = 0;
1971
1972                 if_cfg.s.num_iqueues = octeon_dev->sriov_info.rings_per_vf;
1973                 if_cfg.s.num_oqueues = octeon_dev->sriov_info.rings_per_vf;
1974                 if_cfg.s.base_queue = 0;
1975
1976                 sc->iq_no = 0;
1977
1978                 octeon_prepare_soft_command(octeon_dev, sc, OPCODE_NIC,
1979                                             OPCODE_NIC_IF_CFG, 0, if_cfg.u64,
1980                                             0);
1981
1982                 init_completion(&sc->complete);
1983                 sc->sc_status = OCTEON_REQUEST_PENDING;
1984
1985                 retval = octeon_send_soft_command(octeon_dev, sc);
1986                 if (retval == IQ_SEND_FAILED) {
1987                         dev_err(&octeon_dev->pci_dev->dev,
1988                                 "iq/oq config failed status: %x\n", retval);
1989                         /* Soft instr is freed by driver in case of failure. */
1990                         octeon_free_soft_command(octeon_dev, sc);
1991                         return(-EIO);
1992                 }
1993
1994                 /* Sleep on a wait queue till the cond flag indicates that the
1995                  * response arrived or timed-out.
1996                  */
1997                 retval = wait_for_sc_completion_timeout(octeon_dev, sc, 0);
1998                 if (retval)
1999                         return retval;
2000
2001                 retval = resp->status;
2002                 if (retval) {
2003                         dev_err(&octeon_dev->pci_dev->dev,
2004                                 "iq/oq config failed, retval = %d\n", retval);
2005                         WRITE_ONCE(sc->caller_is_done, true);
2006                         return -EIO;
2007                 }
2008
2009                 snprintf(octeon_dev->fw_info.liquidio_firmware_version,
2010                          32, "%s",
2011                          resp->cfg_info.liquidio_firmware_version);
2012
2013                 octeon_swap_8B_data((u64 *)(&resp->cfg_info),
2014                                     (sizeof(struct liquidio_if_cfg_info)) >> 3);
2015
2016                 num_iqueues = hweight64(resp->cfg_info.iqmask);
2017                 num_oqueues = hweight64(resp->cfg_info.oqmask);
2018
2019                 if (!(num_iqueues) || !(num_oqueues)) {
2020                         dev_err(&octeon_dev->pci_dev->dev,
2021                                 "Got bad iqueues (%016llx) or oqueues (%016llx) from firmware.\n",
2022                                 resp->cfg_info.iqmask, resp->cfg_info.oqmask);
2023                         WRITE_ONCE(sc->caller_is_done, true);
2024                         goto setup_nic_dev_done;
2025                 }
2026                 dev_dbg(&octeon_dev->pci_dev->dev,
2027                         "interface %d, iqmask %016llx, oqmask %016llx, numiqueues %d, numoqueues %d\n",
2028                         i, resp->cfg_info.iqmask, resp->cfg_info.oqmask,
2029                         num_iqueues, num_oqueues);
2030
2031                 netdev = alloc_etherdev_mq(LIO_SIZE, num_iqueues);
2032
2033                 if (!netdev) {
2034                         dev_err(&octeon_dev->pci_dev->dev, "Device allocation failed\n");
2035                         WRITE_ONCE(sc->caller_is_done, true);
2036                         goto setup_nic_dev_done;
2037                 }
2038
2039                 SET_NETDEV_DEV(netdev, &octeon_dev->pci_dev->dev);
2040
2041                 /* Associate the routines that will handle different
2042                  * netdev tasks.
2043                  */
2044                 netdev->netdev_ops = &lionetdevops;
2045
2046                 lio = GET_LIO(netdev);
2047
2048                 memset(lio, 0, sizeof(struct lio));
2049
2050                 lio->ifidx = ifidx_or_pfnum;
2051
2052                 props = &octeon_dev->props[i];
2053                 props->gmxport = resp->cfg_info.linfo.gmxport;
2054                 props->netdev = netdev;
2055
2056                 lio->linfo.num_rxpciq = num_oqueues;
2057                 lio->linfo.num_txpciq = num_iqueues;
2058
2059                 for (j = 0; j < num_oqueues; j++) {
2060                         lio->linfo.rxpciq[j].u64 =
2061                             resp->cfg_info.linfo.rxpciq[j].u64;
2062                 }
2063                 for (j = 0; j < num_iqueues; j++) {
2064                         lio->linfo.txpciq[j].u64 =
2065                             resp->cfg_info.linfo.txpciq[j].u64;
2066                 }
2067
2068                 lio->linfo.hw_addr = resp->cfg_info.linfo.hw_addr;
2069                 lio->linfo.gmxport = resp->cfg_info.linfo.gmxport;
2070                 lio->linfo.link.u64 = resp->cfg_info.linfo.link.u64;
2071                 lio->linfo.macaddr_is_admin_asgnd =
2072                         resp->cfg_info.linfo.macaddr_is_admin_asgnd;
2073                 lio->linfo.macaddr_spoofchk =
2074                         resp->cfg_info.linfo.macaddr_spoofchk;
2075
2076                 lio->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2077
2078                 lio->dev_capability = NETIF_F_HIGHDMA
2079                                       | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
2080                                       | NETIF_F_SG | NETIF_F_RXCSUM
2081                                       | NETIF_F_TSO | NETIF_F_TSO6
2082                                       | NETIF_F_GRO
2083                                       | NETIF_F_LRO;
2084                 netif_set_gso_max_size(netdev, OCTNIC_GSO_MAX_SIZE);
2085
2086                 /* Copy of transmit encapsulation capabilities:
2087                  * TSO, TSO6, Checksums for this device
2088                  */
2089                 lio->enc_dev_capability = NETIF_F_IP_CSUM
2090                                           | NETIF_F_IPV6_CSUM
2091                                           | NETIF_F_GSO_UDP_TUNNEL
2092                                           | NETIF_F_HW_CSUM | NETIF_F_SG
2093                                           | NETIF_F_RXCSUM
2094                                           | NETIF_F_TSO | NETIF_F_TSO6
2095                                           | NETIF_F_LRO;
2096
2097                 netdev->hw_enc_features =
2098                     (lio->enc_dev_capability & ~NETIF_F_LRO);
2099                 netdev->vlan_features = lio->dev_capability;
2100                 /* Add any unchangeable hw features */
2101                 lio->dev_capability |= NETIF_F_HW_VLAN_CTAG_FILTER |
2102                                        NETIF_F_HW_VLAN_CTAG_RX |
2103                                        NETIF_F_HW_VLAN_CTAG_TX;
2104
2105                 netdev->features = (lio->dev_capability & ~NETIF_F_LRO);
2106
2107                 netdev->hw_features = lio->dev_capability;
2108                 netdev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
2109
2110                 /* MTU range: 68 - 16000 */
2111                 netdev->min_mtu = LIO_MIN_MTU_SIZE;
2112                 netdev->max_mtu = LIO_MAX_MTU_SIZE;
2113
2114                 WRITE_ONCE(sc->caller_is_done, true);
2115
2116                 /* Point to the  properties for octeon device to which this
2117                  * interface belongs.
2118                  */
2119                 lio->oct_dev = octeon_dev;
2120                 lio->octprops = props;
2121                 lio->netdev = netdev;
2122
2123                 dev_dbg(&octeon_dev->pci_dev->dev,
2124                         "if%d gmx: %d hw_addr: 0x%llx\n", i,
2125                         lio->linfo.gmxport, CVM_CAST64(lio->linfo.hw_addr));
2126
2127                 /* 64-bit swap required on LE machines */
2128                 octeon_swap_8B_data(&lio->linfo.hw_addr, 1);
2129                 for (j = 0; j < ETH_ALEN; j++)
2130                         mac[j] = *((u8 *)(((u8 *)&lio->linfo.hw_addr) + 2 + j));
2131
2132                 /* Copy MAC Address to OS network device structure */
2133                 ether_addr_copy(netdev->dev_addr, mac);
2134
2135                 if (liquidio_setup_io_queues(octeon_dev, i,
2136                                              lio->linfo.num_txpciq,
2137                                              lio->linfo.num_rxpciq)) {
2138                         dev_err(&octeon_dev->pci_dev->dev, "I/O queues creation failed\n");
2139                         goto setup_nic_dev_free;
2140                 }
2141
2142                 ifstate_set(lio, LIO_IFSTATE_DROQ_OPS);
2143
2144                 /* For VFs, enable Octeon device interrupts here,
2145                  * as this is contingent upon IO queue setup
2146                  */
2147                 octeon_dev->fn_list.enable_interrupt(octeon_dev,
2148                                                      OCTEON_ALL_INTR);
2149
2150                 /* By default all interfaces on a single Octeon uses the same
2151                  * tx and rx queues
2152                  */
2153                 lio->txq = lio->linfo.txpciq[0].s.q_no;
2154                 lio->rxq = lio->linfo.rxpciq[0].s.q_no;
2155
2156                 lio->tx_qsize = octeon_get_tx_qsize(octeon_dev, lio->txq);
2157                 lio->rx_qsize = octeon_get_rx_qsize(octeon_dev, lio->rxq);
2158
2159                 if (lio_setup_glists(octeon_dev, lio, num_iqueues)) {
2160                         dev_err(&octeon_dev->pci_dev->dev,
2161                                 "Gather list allocation failed\n");
2162                         goto setup_nic_dev_free;
2163                 }
2164
2165                 /* Register ethtool support */
2166                 liquidio_set_ethtool_ops(netdev);
2167                 if (lio->oct_dev->chip_id == OCTEON_CN23XX_VF_VID)
2168                         octeon_dev->priv_flags = OCT_PRIV_FLAG_DEFAULT;
2169                 else
2170                         octeon_dev->priv_flags = 0x0;
2171
2172                 if (netdev->features & NETIF_F_LRO)
2173                         liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
2174                                              OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
2175
2176                 if (setup_link_status_change_wq(netdev))
2177                         goto setup_nic_dev_free;
2178
2179                 if (setup_rx_oom_poll_fn(netdev))
2180                         goto setup_nic_dev_free;
2181
2182                 /* Register the network device with the OS */
2183                 if (register_netdev(netdev)) {
2184                         dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
2185                         goto setup_nic_dev_free;
2186                 }
2187
2188                 dev_dbg(&octeon_dev->pci_dev->dev,
2189                         "Setup NIC ifidx:%d mac:%02x%02x%02x%02x%02x%02x\n",
2190                         i, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2191                 netif_carrier_off(netdev);
2192                 lio->link_changes++;
2193
2194                 ifstate_set(lio, LIO_IFSTATE_REGISTERED);
2195
2196                 /* Sending command to firmware to enable Rx checksum offload
2197                  * by default at the time of setup of Liquidio driver for
2198                  * this device
2199                  */
2200                 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
2201                                             OCTNET_CMD_RXCSUM_ENABLE);
2202                 liquidio_set_feature(netdev, OCTNET_CMD_TNL_TX_CSUM_CTL,
2203                                      OCTNET_CMD_TXCSUM_ENABLE);
2204
2205                 dev_dbg(&octeon_dev->pci_dev->dev,
2206                         "NIC ifidx:%d Setup successful\n", i);
2207
2208                 octeon_dev->no_speed_setting = 1;
2209         }
2210
2211         return 0;
2212
2213 setup_nic_dev_free:
2214
2215         while (i--) {
2216                 dev_err(&octeon_dev->pci_dev->dev,
2217                         "NIC ifidx:%d Setup failed\n", i);
2218                 liquidio_destroy_nic_device(octeon_dev, i);
2219         }
2220
2221 setup_nic_dev_done:
2222
2223         return -ENODEV;
2224 }
2225
2226 /**
2227  * \brief initialize the NIC
2228  * @param oct octeon device
2229  *
2230  * This initialization routine is called once the Octeon device application is
2231  * up and running
2232  */
2233 static int liquidio_init_nic_module(struct octeon_device *oct)
2234 {
2235         int num_nic_ports = 1;
2236         int i, retval = 0;
2237
2238         dev_dbg(&oct->pci_dev->dev, "Initializing network interfaces\n");
2239
2240         /* only default iq and oq were initialized
2241          * initialize the rest as well run port_config command for each port
2242          */
2243         oct->ifcount = num_nic_ports;
2244         memset(oct->props, 0,
2245                sizeof(struct octdev_props) * num_nic_ports);
2246
2247         for (i = 0; i < MAX_OCTEON_LINKS; i++)
2248                 oct->props[i].gmxport = -1;
2249
2250         retval = setup_nic_devices(oct);
2251         if (retval) {
2252                 dev_err(&oct->pci_dev->dev, "Setup NIC devices failed\n");
2253                 goto octnet_init_failure;
2254         }
2255
2256         dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n");
2257
2258         return retval;
2259
2260 octnet_init_failure:
2261
2262         oct->ifcount = 0;
2263
2264         return retval;
2265 }
2266
2267 /**
2268  * \brief Device initialization for each Octeon device that is probed
2269  * @param octeon_dev  octeon device
2270  */
2271 static int octeon_device_init(struct octeon_device *oct)
2272 {
2273         u32 rev_id;
2274         int j;
2275
2276         atomic_set(&oct->status, OCT_DEV_BEGIN_STATE);
2277
2278         /* Enable access to the octeon device and make its DMA capability
2279          * known to the OS.
2280          */
2281         if (octeon_pci_os_setup(oct))
2282                 return 1;
2283         atomic_set(&oct->status, OCT_DEV_PCI_ENABLE_DONE);
2284
2285         oct->chip_id = OCTEON_CN23XX_VF_VID;
2286         pci_read_config_dword(oct->pci_dev, 8, &rev_id);
2287         oct->rev_id = rev_id & 0xff;
2288
2289         if (cn23xx_setup_octeon_vf_device(oct))
2290                 return 1;
2291
2292         atomic_set(&oct->status, OCT_DEV_PCI_MAP_DONE);
2293
2294         oct->app_mode = CVM_DRV_NIC_APP;
2295
2296         /* Initialize the dispatch mechanism used to push packets arriving on
2297          * Octeon Output queues.
2298          */
2299         if (octeon_init_dispatch_list(oct))
2300                 return 1;
2301
2302         atomic_set(&oct->status, OCT_DEV_DISPATCH_INIT_DONE);
2303
2304         if (octeon_set_io_queues_off(oct)) {
2305                 dev_err(&oct->pci_dev->dev, "setting io queues off failed\n");
2306                 return 1;
2307         }
2308
2309         if (oct->fn_list.setup_device_regs(oct)) {
2310                 dev_err(&oct->pci_dev->dev, "device registers configuration failed\n");
2311                 return 1;
2312         }
2313
2314         /* Initialize soft command buffer pool */
2315         if (octeon_setup_sc_buffer_pool(oct)) {
2316                 dev_err(&oct->pci_dev->dev, "sc buffer pool allocation failed\n");
2317                 return 1;
2318         }
2319         atomic_set(&oct->status, OCT_DEV_SC_BUFF_POOL_INIT_DONE);
2320
2321         /* Setup the data structures that manage this Octeon's Input queues. */
2322         if (octeon_setup_instr_queues(oct)) {
2323                 dev_err(&oct->pci_dev->dev, "instruction queue initialization failed\n");
2324                 return 1;
2325         }
2326         atomic_set(&oct->status, OCT_DEV_INSTR_QUEUE_INIT_DONE);
2327
2328         /* Initialize lists to manage the requests of different types that
2329          * arrive from user & kernel applications for this octeon device.
2330          */
2331         if (octeon_setup_response_list(oct)) {
2332                 dev_err(&oct->pci_dev->dev, "Response list allocation failed\n");
2333                 return 1;
2334         }
2335         atomic_set(&oct->status, OCT_DEV_RESP_LIST_INIT_DONE);
2336
2337         if (octeon_setup_output_queues(oct)) {
2338                 dev_err(&oct->pci_dev->dev, "Output queue initialization failed\n");
2339                 return 1;
2340         }
2341         atomic_set(&oct->status, OCT_DEV_DROQ_INIT_DONE);
2342
2343         if (oct->fn_list.setup_mbox(oct)) {
2344                 dev_err(&oct->pci_dev->dev, "Mailbox setup failed\n");
2345                 return 1;
2346         }
2347         atomic_set(&oct->status, OCT_DEV_MBOX_SETUP_DONE);
2348
2349         if (octeon_allocate_ioq_vector(oct, oct->sriov_info.rings_per_vf)) {
2350                 dev_err(&oct->pci_dev->dev, "ioq vector allocation failed\n");
2351                 return 1;
2352         }
2353         atomic_set(&oct->status, OCT_DEV_MSIX_ALLOC_VECTOR_DONE);
2354
2355         dev_info(&oct->pci_dev->dev, "OCTEON_CN23XX VF Version: %s, %d ioqs\n",
2356                  LIQUIDIO_VERSION, oct->sriov_info.rings_per_vf);
2357
2358         /* Setup the interrupt handler and record the INT SUM register address*/
2359         if (octeon_setup_interrupt(oct, oct->sriov_info.rings_per_vf))
2360                 return 1;
2361
2362         atomic_set(&oct->status, OCT_DEV_INTR_SET_DONE);
2363
2364         /* ***************************************************************
2365          * The interrupts need to be enabled for the PF<-->VF handshake.
2366          * They are [re]-enabled after the PF<-->VF handshake so that the
2367          * correct OQ tick value is used (i.e. the value retrieved from
2368          * the PF as part of the handshake).
2369          */
2370
2371         /* Enable Octeon device interrupts */
2372         oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2373
2374         if (cn23xx_octeon_pfvf_handshake(oct))
2375                 return 1;
2376
2377         /* Here we [re]-enable the interrupts so that the correct OQ tick value
2378          * is used (i.e. the value that was retrieved during the handshake)
2379          */
2380
2381         /* Enable Octeon device interrupts */
2382         oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2383         /* *************************************************************** */
2384
2385         /* Enable the input and output queues for this Octeon device */
2386         if (oct->fn_list.enable_io_queues(oct)) {
2387                 dev_err(&oct->pci_dev->dev, "enabling io queues failed\n");
2388                 return 1;
2389         }
2390
2391         atomic_set(&oct->status, OCT_DEV_IO_QUEUES_DONE);
2392
2393         atomic_set(&oct->status, OCT_DEV_HOST_OK);
2394
2395         /* Send Credit for Octeon Output queues. Credits are always sent after
2396          * the output queue is enabled.
2397          */
2398         for (j = 0; j < oct->num_oqs; j++)
2399                 writel(oct->droq[j]->max_count, oct->droq[j]->pkts_credit_reg);
2400
2401         /* Packets can start arriving on the output queues from this point. */
2402
2403         atomic_set(&oct->status, OCT_DEV_CORE_OK);
2404
2405         atomic_set(&oct->status, OCT_DEV_RUNNING);
2406
2407         if (liquidio_init_nic_module(oct))
2408                 return 1;
2409
2410         return 0;
2411 }
2412
2413 static int __init liquidio_vf_init(void)
2414 {
2415         octeon_init_device_list(0);
2416         return pci_register_driver(&liquidio_vf_pci_driver);
2417 }
2418
2419 static void __exit liquidio_vf_exit(void)
2420 {
2421         pci_unregister_driver(&liquidio_vf_pci_driver);
2422
2423         pr_info("LiquidIO_VF network module is now unloaded\n");
2424 }
2425
2426 module_init(liquidio_vf_init);
2427 module_exit(liquidio_vf_exit);