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
  36 static int debug = -1;
  37 module_param(debug, int, 0644);
  38 MODULE_PARM_DESC(debug, "NETIF_MSG debug bits");
  39
  40 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
  41
  42 struct oct_timestamp_resp {
  43         u64 rh;
  44         u64 timestamp;
  45         u64 status;
  46 };
  47
  48 union tx_info {
  49         u64 u64;
  50         struct {
  51 #ifdef __BIG_ENDIAN_BITFIELD
  52                 u16 gso_size;
  53                 u16 gso_segs;
  54                 u32 reserved;
  55 #else
  56                 u32 reserved;
  57                 u16 gso_segs;
  58                 u16 gso_size;
  59 #endif
  60         } s;
  61 };
  62
  63 #define OCTNIC_GSO_MAX_HEADER_SIZE 128
  64 #define OCTNIC_GSO_MAX_SIZE \
  65                 (CN23XX_DEFAULT_INPUT_JABBER - OCTNIC_GSO_MAX_HEADER_SIZE)
  66
  67 static int
  68 liquidio_vf_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
  69 static void liquidio_vf_remove(struct pci_dev *pdev);
  70 static int octeon_device_init(struct octeon_device *oct);
  71 static int liquidio_stop(struct net_device *netdev);
  72
  73 static int lio_wait_for_oq_pkts(struct octeon_device *oct)
  74 {
  75         struct octeon_device_priv *oct_priv =
  76             (struct octeon_device_priv *)oct->priv;
  77         int retry = MAX_IO_PENDING_PKT_COUNT;
  78         int pkt_cnt = 0, pending_pkts;
  79         int i;
  80
  81         do {
  82                 pending_pkts = 0;
  83
  84                 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
  85                         if (!(oct->io_qmask.oq & BIT_ULL(i)))
  86                                 continue;
  87                         pkt_cnt += octeon_droq_check_hw_for_pkts(oct->droq[i]);
  88                 }
  89                 if (pkt_cnt > 0) {
  90                         pending_pkts += pkt_cnt;
  91                         tasklet_schedule(&oct_priv->droq_tasklet);
  92                 }
  93                 pkt_cnt = 0;
  94                 schedule_timeout_uninterruptible(1);
  95
  96         } while (retry-- && pending_pkts);
  97
  98         return pkt_cnt;
  99 }
 100
 101 /**
 102  * \brief Cause device to go quiet so it can be safely removed/reset/etc
 103  * @param oct Pointer to Octeon device
 104  */
 105 static void pcierror_quiesce_device(struct octeon_device *oct)
 106 {
 107         int i;
 108
 109         /* Disable the input and output queues now. No more packets will
 110          * arrive from Octeon, but we should wait for all packet processing
 111          * to finish.
 112          */
 113
 114         /* To allow for in-flight requests */
 115         schedule_timeout_uninterruptible(100);
 116
 117         if (wait_for_pending_requests(oct))
 118                 dev_err(&oct->pci_dev->dev, "There were pending requests\n");
 119
 120         /* Force all requests waiting to be fetched by OCTEON to complete. */
 121         for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
 122                 struct octeon_instr_queue *iq;
 123
 124                 if (!(oct->io_qmask.iq & BIT_ULL(i)))
 125                         continue;
 126                 iq = oct->instr_queue[i];
 127
 128                 if (atomic_read(&iq->instr_pending)) {
 129                         spin_lock_bh(&iq->lock);
 130                         iq->fill_cnt = 0;
 131                         iq->octeon_read_index = iq->host_write_index;
 132                         iq->stats.instr_processed +=
 133                             atomic_read(&iq->instr_pending);
 134                         lio_process_iq_request_list(oct, iq, 0);
 135                         spin_unlock_bh(&iq->lock);
 136                 }
 137         }
 138
 139         /* Force all pending ordered list requests to time out. */
 140         lio_process_ordered_list(oct, 1);
 141
 142         /* We do not need to wait for output queue packets to be processed. */
 143 }
 144
 145 /**
 146  * \brief Cleanup PCI AER uncorrectable error status
 147  * @param dev Pointer to PCI device
 148  */
 149 static void cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
 150 {
 151         u32 status, mask;
 152         int pos = 0x100;
 153
 154         pr_info("%s :\n", __func__);
 155
 156         pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
 157         pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
 158         if (dev->error_state == pci_channel_io_normal)
 159                 status &= ~mask; /* Clear corresponding nonfatal bits */
 160         else
 161                 status &= mask; /* Clear corresponding fatal bits */
 162         pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
 163 }
 164
 165 /**
 166  * \brief Stop all PCI IO to a given device
 167  * @param dev Pointer to Octeon device
 168  */
 169 static void stop_pci_io(struct octeon_device *oct)
 170 {
 171         struct msix_entry *msix_entries;
 172         int i;
 173
 174         /* No more instructions will be forwarded. */
 175         atomic_set(&oct->status, OCT_DEV_IN_RESET);
 176
 177         for (i = 0; i < oct->ifcount; i++)
 178                 netif_device_detach(oct->props[i].netdev);
 179
 180         /* Disable interrupts  */
 181         oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
 182
 183         pcierror_quiesce_device(oct);
 184         if (oct->msix_on) {
 185                 msix_entries = (struct msix_entry *)oct->msix_entries;
 186                 for (i = 0; i < oct->num_msix_irqs; i++) {
 187                         /* clear the affinity_cpumask */
 188                         irq_set_affinity_hint(msix_entries[i].vector,
 189                                               NULL);
 190                         free_irq(msix_entries[i].vector,
 191                                  &oct->ioq_vector[i]);
 192                 }
 193                 pci_disable_msix(oct->pci_dev);
 194                 kfree(oct->msix_entries);
 195                 oct->msix_entries = NULL;
 196                 octeon_free_ioq_vector(oct);
 197         }
 198         dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
 199                 lio_get_state_string(&oct->status));
 200
 201         /* making it a common function for all OCTEON models */
 202         cleanup_aer_uncorrect_error_status(oct->pci_dev);
 203
 204         pci_disable_device(oct->pci_dev);
 205 }
 206
 207 /**
 208  * \brief called when PCI error is detected
 209  * @param pdev Pointer to PCI device
 210  * @param state The current pci connection state
 211  *
 212  * This function is called after a PCI bus error affecting
 213  * this device has been detected.
 214  */
 215 static pci_ers_result_t liquidio_pcie_error_detected(struct pci_dev *pdev,
 216                                                      pci_channel_state_t state)
 217 {
 218         struct octeon_device *oct = pci_get_drvdata(pdev);
 219
 220         /* Non-correctable Non-fatal errors */
 221         if (state == pci_channel_io_normal) {
 222                 dev_err(&oct->pci_dev->dev, "Non-correctable non-fatal error reported:\n");
 223                 cleanup_aer_uncorrect_error_status(oct->pci_dev);
 224                 return PCI_ERS_RESULT_CAN_RECOVER;
 225         }
 226
 227         /* Non-correctable Fatal errors */
 228         dev_err(&oct->pci_dev->dev, "Non-correctable FATAL reported by PCI AER driver\n");
 229         stop_pci_io(oct);
 230
 231         return PCI_ERS_RESULT_DISCONNECT;
 232 }
 233
 234 /* For PCI-E Advanced Error Recovery (AER) Interface */
 235 static const struct pci_error_handlers liquidio_vf_err_handler = {
 236         .error_detected = liquidio_pcie_error_detected,
 237 };
 238
 239 static const struct pci_device_id liquidio_vf_pci_tbl[] = {
 240         {
 241                 PCI_VENDOR_ID_CAVIUM, OCTEON_CN23XX_VF_VID,
 242                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
 243         },
 244         {
 245                 0, 0, 0, 0, 0, 0, 0
 246         }
 247 };
 248 MODULE_DEVICE_TABLE(pci, liquidio_vf_pci_tbl);
 249
 250 static struct pci_driver liquidio_vf_pci_driver = {
 251         .name           = "LiquidIO_VF",
 252         .id_table       = liquidio_vf_pci_tbl,
 253         .probe          = liquidio_vf_probe,
 254         .remove         = liquidio_vf_remove,
 255         .err_handler    = &liquidio_vf_err_handler,    /* For AER */
 256 };
 257
 258 /**
 259  * \brief Print link information
 260  * @param netdev network device
 261  */
 262 static void print_link_info(struct net_device *netdev)
 263 {
 264         struct lio *lio = GET_LIO(netdev);
 265
 266         if (!ifstate_check(lio, LIO_IFSTATE_RESETTING) &&
 267             ifstate_check(lio, LIO_IFSTATE_REGISTERED)) {
 268                 struct oct_link_info *linfo = &lio->linfo;
 269
 270                 if (linfo->link.s.link_up) {
 271                         netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
 272                                    linfo->link.s.speed,
 273                                    (linfo->link.s.duplex) ? "Full" : "Half");
 274                 } else {
 275                         netif_info(lio, link, lio->netdev, "Link Down\n");
 276                 }
 277         }
 278 }
 279
 280 /**
 281  * \brief Routine to notify MTU change
 282  * @param work work_struct data structure
 283  */
 284 static void octnet_link_status_change(struct work_struct *work)
 285 {
 286         struct cavium_wk *wk = (struct cavium_wk *)work;
 287         struct lio *lio = (struct lio *)wk->ctxptr;
 288
 289         /* lio->linfo.link.s.mtu always contains max MTU of the lio interface.
 290          * this API is invoked only when new max-MTU of the interface is
 291          * less than current MTU.
 292          */
 293         rtnl_lock();
 294         dev_set_mtu(lio->netdev, lio->linfo.link.s.mtu);
 295         rtnl_unlock();
 296 }
 297
 298 /**
 299  * \brief Sets up the mtu status change work
 300  * @param netdev network device
 301  */
 302 static int setup_link_status_change_wq(struct net_device *netdev)
 303 {
 304         struct lio *lio = GET_LIO(netdev);
 305         struct octeon_device *oct = lio->oct_dev;
 306
 307         lio->link_status_wq.wq = alloc_workqueue("link-status",
 308                                                  WQ_MEM_RECLAIM, 0);
 309         if (!lio->link_status_wq.wq) {
 310                 dev_err(&oct->pci_dev->dev, "unable to create cavium link status wq\n");
 311                 return -1;
 312         }
 313         INIT_DELAYED_WORK(&lio->link_status_wq.wk.work,
 314                           octnet_link_status_change);
 315         lio->link_status_wq.wk.ctxptr = lio;
 316
 317         return 0;
 318 }
 319
 320 static void cleanup_link_status_change_wq(struct net_device *netdev)
 321 {
 322         struct lio *lio = GET_LIO(netdev);
 323
 324         if (lio->link_status_wq.wq) {
 325                 cancel_delayed_work_sync(&lio->link_status_wq.wk.work);
 326                 destroy_workqueue(lio->link_status_wq.wq);
 327         }
 328 }
 329
 330 /**
 331  * \brief Update link status
 332  * @param netdev network device
 333  * @param ls link status structure
 334  *
 335  * Called on receipt of a link status response from the core application to
 336  * update each interface's link status.
 337  */
 338 static void update_link_status(struct net_device *netdev,
 339                                union oct_link_status *ls)
 340 {
 341         struct lio *lio = GET_LIO(netdev);
 342         int current_max_mtu = lio->linfo.link.s.mtu;
 343         struct octeon_device *oct = lio->oct_dev;
 344
 345         if ((lio->intf_open) && (lio->linfo.link.u64 != ls->u64)) {
 346                 lio->linfo.link.u64 = ls->u64;
 347
 348                 print_link_info(netdev);
 349                 lio->link_changes++;
 350
 351                 if (lio->linfo.link.s.link_up) {
 352                         netif_carrier_on(netdev);
 353                         wake_txqs(netdev);
 354                 } else {
 355                         netif_carrier_off(netdev);
 356                         stop_txqs(netdev);
 357                 }
 358
 359                 if (lio->linfo.link.s.mtu != current_max_mtu) {
 360                         dev_info(&oct->pci_dev->dev,
 361                                  "Max MTU Changed from %d to %d\n",
 362                                  current_max_mtu, lio->linfo.link.s.mtu);
 363                         netdev->max_mtu = lio->linfo.link.s.mtu;
 364                 }
 365
 366                 if (lio->linfo.link.s.mtu < netdev->mtu) {
 367                         dev_warn(&oct->pci_dev->dev,
 368                                  "Current MTU is higher than new max MTU; Reducing the current mtu from %d to %d\n",
 369                                  netdev->mtu, lio->linfo.link.s.mtu);
 370                         queue_delayed_work(lio->link_status_wq.wq,
 371                                            &lio->link_status_wq.wk.work, 0);
 372                 }
 373         }
 374 }
 375
 376 /**
 377  * \brief PCI probe handler
 378  * @param pdev PCI device structure
 379  * @param ent unused
 380  */
 381 static int
 382 liquidio_vf_probe(struct pci_dev *pdev,
 383                   const struct pci_device_id *ent __attribute__((unused)))
 384 {
 385         struct octeon_device *oct_dev = NULL;
 386
 387         oct_dev = octeon_allocate_device(pdev->device,
 388                                          sizeof(struct octeon_device_priv));
 389
 390         if (!oct_dev) {
 391                 dev_err(&pdev->dev, "Unable to allocate device\n");
 392                 return -ENOMEM;
 393         }
 394         oct_dev->msix_on = LIO_FLAG_MSIX_ENABLED;
 395
 396         dev_info(&pdev->dev, "Initializing device %x:%x.\n",
 397                  (u32)pdev->vendor, (u32)pdev->device);
 398
 399         /* Assign octeon_device for this device to the private data area. */
 400         pci_set_drvdata(pdev, oct_dev);
 401
 402         /* set linux specific device pointer */
 403         oct_dev->pci_dev = pdev;
 404
 405         oct_dev->subsystem_id = pdev->subsystem_vendor |
 406                 (pdev->subsystem_device << 16);
 407
 408         if (octeon_device_init(oct_dev)) {
 409                 liquidio_vf_remove(pdev);
 410                 return -ENOMEM;
 411         }
 412
 413         dev_dbg(&oct_dev->pci_dev->dev, "Device is ready\n");
 414
 415         return 0;
 416 }
 417
 418 /**
 419  * \brief PCI FLR for each Octeon device.
 420  * @param oct octeon device
 421  */
 422 static void octeon_pci_flr(struct octeon_device *oct)
 423 {
 424         pci_save_state(oct->pci_dev);
 425
 426         pci_cfg_access_lock(oct->pci_dev);
 427
 428         /* Quiesce the device completely */
 429         pci_write_config_word(oct->pci_dev, PCI_COMMAND,
 430                               PCI_COMMAND_INTX_DISABLE);
 431
 432         pcie_flr(oct->pci_dev);
 433
 434         pci_cfg_access_unlock(oct->pci_dev);
 435
 436         pci_restore_state(oct->pci_dev);
 437 }
 438
 439 /**
 440  *\brief Destroy resources associated with octeon device
 441  * @param pdev PCI device structure
 442  * @param ent unused
 443  */
 444 static void octeon_destroy_resources(struct octeon_device *oct)
 445 {
 446         struct octeon_device_priv *oct_priv =
 447                 (struct octeon_device_priv *)oct->priv;
 448         struct msix_entry *msix_entries;
 449         int i;
 450
 451         switch (atomic_read(&oct->status)) {
 452         case OCT_DEV_RUNNING:
 453         case OCT_DEV_CORE_OK:
 454                 /* No more instructions will be forwarded. */
 455                 atomic_set(&oct->status, OCT_DEV_IN_RESET);
 456
 457                 oct->app_mode = CVM_DRV_INVALID_APP;
 458                 dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
 459                         lio_get_state_string(&oct->status));
 460
 461                 schedule_timeout_uninterruptible(HZ / 10);
 462
 463                 fallthrough;
 464         case OCT_DEV_HOST_OK:
 465         case OCT_DEV_IO_QUEUES_DONE:
 466                 if (lio_wait_for_instr_fetch(oct))
 467                         dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");
 468
 469                 if (wait_for_pending_requests(oct))
 470                         dev_err(&oct->pci_dev->dev, "There were pending requests\n");
 471
 472                 /* Disable the input and output queues now. No more packets will
 473                  * arrive from Octeon, but we should wait for all packet
 474                  * processing to finish.
 475                  */
 476                 oct->fn_list.disable_io_queues(oct);
 477
 478                 if (lio_wait_for_oq_pkts(oct))
 479                         dev_err(&oct->pci_dev->dev, "OQ had pending packets\n");
 480
 481                 /* Force all requests waiting to be fetched by OCTEON to
 482                  * complete.
 483                  */
 484                 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
 485                         struct octeon_instr_queue *iq;
 486
 487                         if (!(oct->io_qmask.iq & BIT_ULL(i)))
 488                                 continue;
 489                         iq = oct->instr_queue[i];
 490
 491                         if (atomic_read(&iq->instr_pending)) {
 492                                 spin_lock_bh(&iq->lock);
 493                                 iq->fill_cnt = 0;
 494                                 iq->octeon_read_index = iq->host_write_index;
 495                                 iq->stats.instr_processed +=
 496                                         atomic_read(&iq->instr_pending);
 497                                 lio_process_iq_request_list(oct, iq, 0);
 498                                 spin_unlock_bh(&iq->lock);
 499                         }
 500                 }
 501
 502                 lio_process_ordered_list(oct, 1);
 503                 octeon_free_sc_done_list(oct);
 504                 octeon_free_sc_zombie_list(oct);
 505
 506                 fallthrough;
 507         case OCT_DEV_INTR_SET_DONE:
 508                 /* Disable interrupts  */
 509                 oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
 510
 511                 if (oct->msix_on) {
 512                         msix_entries = (struct msix_entry *)oct->msix_entries;
 513                         for (i = 0; i < oct->num_msix_irqs; i++) {
 514                                 if (oct->ioq_vector[i].vector) {
 515                                         irq_set_affinity_hint(
 516                                                         msix_entries[i].vector,
 517                                                         NULL);
 518                                         free_irq(msix_entries[i].vector,
 519                                                  &oct->ioq_vector[i]);
 520                                         oct->ioq_vector[i].vector = 0;
 521                                 }
 522                         }
 523                         pci_disable_msix(oct->pci_dev);
 524                         kfree(oct->msix_entries);
 525                         oct->msix_entries = NULL;
 526                         kfree(oct->irq_name_storage);
 527                         oct->irq_name_storage = NULL;
 528                 }
 529                 /* Soft reset the octeon device before exiting */
 530                 if (oct->pci_dev->reset_fn)
 531                         octeon_pci_flr(oct);
 532                 else
 533                         cn23xx_vf_ask_pf_to_do_flr(oct);
 534
 535                 fallthrough;
 536         case OCT_DEV_MSIX_ALLOC_VECTOR_DONE:
 537                 octeon_free_ioq_vector(oct);
 538
 539                 fallthrough;
 540         case OCT_DEV_MBOX_SETUP_DONE:
 541                 oct->fn_list.free_mbox(oct);
 542
 543                 fallthrough;
 544         case OCT_DEV_IN_RESET:
 545         case OCT_DEV_DROQ_INIT_DONE:
 546                 mdelay(100);
 547                 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
 548                         if (!(oct->io_qmask.oq & BIT_ULL(i)))
 549                                 continue;
 550                         octeon_delete_droq(oct, i);
 551                 }
 552
 553                 fallthrough;
 554         case OCT_DEV_RESP_LIST_INIT_DONE:
 555                 octeon_delete_response_list(oct);
 556
 557                 fallthrough;
 558         case OCT_DEV_INSTR_QUEUE_INIT_DONE:
 559                 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
 560                         if (!(oct->io_qmask.iq & BIT_ULL(i)))
 561                                 continue;
 562                         octeon_delete_instr_queue(oct, i);
 563                 }
 564
 565                 fallthrough;
 566         case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
 567                 octeon_free_sc_buffer_pool(oct);
 568
 569                 fallthrough;
 570         case OCT_DEV_DISPATCH_INIT_DONE:
 571                 octeon_delete_dispatch_list(oct);
 572                 cancel_delayed_work_sync(&oct->nic_poll_work.work);
 573
 574                 fallthrough;
 575         case OCT_DEV_PCI_MAP_DONE:
 576                 octeon_unmap_pci_barx(oct, 0);
 577                 octeon_unmap_pci_barx(oct, 1);
 578
 579                 fallthrough;
 580         case OCT_DEV_PCI_ENABLE_DONE:
 581                 pci_clear_master(oct->pci_dev);
 582                 /* Disable the device, releasing the PCI INT */
 583                 pci_disable_device(oct->pci_dev);
 584
 585                 fallthrough;
 586         case OCT_DEV_BEGIN_STATE:
 587                 /* Nothing to be done here either */
 588                 break;
 589         }
 590
 591         tasklet_kill(&oct_priv->droq_tasklet);
 592 }
 593
 594 /**
 595  * \brief Send Rx control command
 596  * @param lio per-network private data
 597  * @param start_stop whether to start or stop
 598  */
 599 static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
 600 {
 601         struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
 602         struct octeon_soft_command *sc;
 603         union octnet_cmd *ncmd;
 604         int retval;
 605
 606         if (oct->props[lio->ifidx].rx_on == start_stop)
 607                 return;
 608
 609         sc = (struct octeon_soft_command *)
 610                 octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
 611                                           16, 0);
 612
 613         ncmd = (union octnet_cmd *)sc->virtdptr;
 614
 615         ncmd->u64 = 0;
 616         ncmd->s.cmd = OCTNET_CMD_RX_CTL;
 617         ncmd->s.param1 = start_stop;
 618
 619         octeon_swap_8B_data((u64 *)ncmd, (OCTNET_CMD_SIZE >> 3));
 620
 621         sc->iq_no = lio->linfo.txpciq[0].s.q_no;
 622
 623         octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
 624                                     OPCODE_NIC_CMD, 0, 0, 0);
 625
 626         init_completion(&sc->complete);
 627         sc->sc_status = OCTEON_REQUEST_PENDING;
 628
 629         retval = octeon_send_soft_command(oct, sc);
 630         if (retval == IQ_SEND_FAILED) {
 631                 netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
 632                 octeon_free_soft_command(oct, sc);
 633         } else {
 634                 /* Sleep on a wait queue till the cond flag indicates that the
 635                  * response arrived or timed-out.
 636                  */
 637                 retval = wait_for_sc_completion_timeout(oct, sc, 0);
 638                 if (retval)
 639                         return;
 640
 641                 oct->props[lio->ifidx].rx_on = start_stop;
 642                 WRITE_ONCE(sc->caller_is_done, true);
 643         }
 644 }
 645
 646 /**
 647  * \brief Destroy NIC device interface
 648  * @param oct octeon device
 649  * @param ifidx which interface to destroy
 650  *
 651  * Cleanup associated with each interface for an Octeon device  when NIC
 652  * module is being unloaded or if initialization fails during load.
 653  */
 654 static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
 655 {
 656         struct net_device *netdev = oct->props[ifidx].netdev;
 657         struct octeon_device_priv *oct_priv =
 658                 (struct octeon_device_priv *)oct->priv;
 659         struct napi_struct *napi, *n;
 660         struct lio *lio;
 661
 662         if (!netdev) {
 663                 dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
 664                         __func__, ifidx);
 665                 return;
 666         }
 667
 668         lio = GET_LIO(netdev);
 669
 670         dev_dbg(&oct->pci_dev->dev, "NIC device cleanup\n");
 671
 672         if (atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING)
 673                 liquidio_stop(netdev);
 674
 675         if (oct->props[lio->ifidx].napi_enabled == 1) {
 676                 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
 677                         napi_disable(napi);
 678
 679                 oct->props[lio->ifidx].napi_enabled = 0;
 680
 681                 oct->droq[0]->ops.poll_mode = 0;
 682         }
 683
 684         /* Delete NAPI */
 685         list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
 686                 netif_napi_del(napi);
 687
 688         tasklet_enable(&oct_priv->droq_tasklet);
 689
 690         if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
 691                 unregister_netdev(netdev);
 692
 693         cleanup_rx_oom_poll_fn(netdev);
 694
 695         cleanup_link_status_change_wq(netdev);
 696
 697         lio_delete_glists(lio);
 698
 699         free_netdev(netdev);
 700
 701         oct->props[ifidx].gmxport = -1;
 702
 703         oct->props[ifidx].netdev = NULL;
 704 }
 705
 706 /**
 707  * \brief Stop complete NIC functionality
 708  * @param oct octeon device
 709  */
 710 static int liquidio_stop_nic_module(struct octeon_device *oct)
 711 {
 712         struct lio *lio;
 713         int i, j;
 714
 715         dev_dbg(&oct->pci_dev->dev, "Stopping network interfaces\n");
 716         if (!oct->ifcount) {
 717                 dev_err(&oct->pci_dev->dev, "Init for Octeon was not completed\n");
 718                 return 1;
 719         }
 720
 721         spin_lock_bh(&oct->cmd_resp_wqlock);
 722         oct->cmd_resp_state = OCT_DRV_OFFLINE;
 723         spin_unlock_bh(&oct->cmd_resp_wqlock);
 724
 725         for (i = 0; i < oct->ifcount; i++) {
 726                 lio = GET_LIO(oct->props[i].netdev);
 727                 for (j = 0; j < oct->num_oqs; j++)
 728                         octeon_unregister_droq_ops(oct,
 729                                                    lio->linfo.rxpciq[j].s.q_no);
 730         }
 731
 732         for (i = 0; i < oct->ifcount; i++)
 733                 liquidio_destroy_nic_device(oct, i);
 734
 735         dev_dbg(&oct->pci_dev->dev, "Network interfaces stopped\n");
 736         return 0;
 737 }
 738
 739 /**
 740  * \brief Cleans up resources at unload time
 741  * @param pdev PCI device structure
 742  */
 743 static void liquidio_vf_remove(struct pci_dev *pdev)
 744 {
 745         struct octeon_device *oct_dev = pci_get_drvdata(pdev);
 746
 747         dev_dbg(&oct_dev->pci_dev->dev, "Stopping device\n");
 748
 749         if (oct_dev->app_mode == CVM_DRV_NIC_APP)
 750                 liquidio_stop_nic_module(oct_dev);
 751
 752         /* Reset the octeon device and cleanup all memory allocated for
 753          * the octeon device by driver.
 754          */
 755         octeon_destroy_resources(oct_dev);
 756
 757         dev_info(&oct_dev->pci_dev->dev, "Device removed\n");
 758
 759         /* This octeon device has been removed. Update the global
 760          * data structure to reflect this. Free the device structure.
 761          */
 762         octeon_free_device_mem(oct_dev);
 763 }
 764
 765 /**
 766  * \brief PCI initialization for each Octeon device.
 767  * @param oct octeon device
 768  */
 769 static int octeon_pci_os_setup(struct octeon_device *oct)
 770 {
 771 #ifdef CONFIG_PCI_IOV
 772         /* setup PCI stuff first */
 773         if (!oct->pci_dev->physfn)
 774                 octeon_pci_flr(oct);
 775 #endif
 776
 777         if (pci_enable_device(oct->pci_dev)) {
 778                 dev_err(&oct->pci_dev->dev, "pci_enable_device failed\n");
 779                 return 1;
 780         }
 781
 782         if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
 783                 dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
 784                 pci_disable_device(oct->pci_dev);
 785                 return 1;
 786         }
 787
 788         /* Enable PCI DMA Master. */
 789         pci_set_master(oct->pci_dev);
 790
 791         return 0;
 792 }
 793
 794 /**
 795  * \brief Unmap and free network buffer
 796  * @param buf buffer
 797  */
 798 static void free_netbuf(void *buf)
 799 {
 800         struct octnet_buf_free_info *finfo;
 801         struct sk_buff *skb;
 802         struct lio *lio;
 803
 804         finfo = (struct octnet_buf_free_info *)buf;
 805         skb = finfo->skb;
 806         lio = finfo->lio;
 807
 808         dma_unmap_single(&lio->oct_dev->pci_dev->dev, finfo->dptr, skb->len,
 809                          DMA_TO_DEVICE);
 810
 811         tx_buffer_free(skb);
 812 }
 813
 814 /**
 815  * \brief Unmap and free gather buffer
 816  * @param buf buffer
 817  */
 818 static void free_netsgbuf(void *buf)
 819 {
 820         struct octnet_buf_free_info *finfo;
 821         struct octnic_gather *g;
 822         struct sk_buff *skb;
 823         int i, frags, iq;
 824         struct lio *lio;
 825
 826         finfo = (struct octnet_buf_free_info *)buf;
 827         skb = finfo->skb;
 828         lio = finfo->lio;
 829         g = finfo->g;
 830         frags = skb_shinfo(skb)->nr_frags;
 831
 832         dma_unmap_single(&lio->oct_dev->pci_dev->dev,
 833                          g->sg[0].ptr[0], (skb->len - skb->data_len),
 834                          DMA_TO_DEVICE);
 835
 836         i = 1;
 837         while (frags--) {
 838                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
 839
 840                 pci_unmap_page((lio->oct_dev)->pci_dev,
 841                                g->sg[(i >> 2)].ptr[(i & 3)],
 842                                skb_frag_size(frag), DMA_TO_DEVICE);
 843                 i++;
 844         }
 845
 846         iq = skb_iq(lio->oct_dev, skb);
 847
 848         spin_lock(&lio->glist_lock[iq]);
 849         list_add_tail(&g->list, &lio->glist[iq]);
 850         spin_unlock(&lio->glist_lock[iq]);
 851
 852         tx_buffer_free(skb);
 853 }
 854
 855 /**
 856  * \brief Unmap and free gather buffer with response
 857  * @param buf buffer
 858  */
 859 static void free_netsgbuf_with_resp(void *buf)
 860 {
 861         struct octnet_buf_free_info *finfo;
 862         struct octeon_soft_command *sc;
 863         struct octnic_gather *g;
 864         struct sk_buff *skb;
 865         int i, frags, iq;
 866         struct lio *lio;
 867
 868         sc = (struct octeon_soft_command *)buf;
 869         skb = (struct sk_buff *)sc->callback_arg;
 870         finfo = (struct octnet_buf_free_info *)&skb->cb;
 871
 872         lio = finfo->lio;
 873         g = finfo->g;
 874         frags = skb_shinfo(skb)->nr_frags;
 875
 876         dma_unmap_single(&lio->oct_dev->pci_dev->dev,
 877                          g->sg[0].ptr[0], (skb->len - skb->data_len),
 878                          DMA_TO_DEVICE);
 879
 880         i = 1;
 881         while (frags--) {
 882                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
 883
 884                 pci_unmap_page((lio->oct_dev)->pci_dev,
 885                                g->sg[(i >> 2)].ptr[(i & 3)],
 886                                skb_frag_size(frag), DMA_TO_DEVICE);
 887                 i++;
 888         }
 889
 890         iq = skb_iq(lio->oct_dev, skb);
 891
 892         spin_lock(&lio->glist_lock[iq]);
 893         list_add_tail(&g->list, &lio->glist[iq]);
 894         spin_unlock(&lio->glist_lock[iq]);
 895
 896         /* Don't free the skb yet */
 897 }
 898
 899 /**
 900  * \brief Net device open for LiquidIO
 901  * @param netdev network device
 902  */
 903 static int liquidio_open(struct net_device *netdev)
 904 {
 905         struct lio *lio = GET_LIO(netdev);
 906         struct octeon_device *oct = lio->oct_dev;
 907         struct octeon_device_priv *oct_priv =
 908                 (struct octeon_device_priv *)oct->priv;
 909         struct napi_struct *napi, *n;
 910
 911         if (!oct->props[lio->ifidx].napi_enabled) {
 912                 tasklet_disable(&oct_priv->droq_tasklet);
 913
 914                 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
 915                         napi_enable(napi);
 916
 917                 oct->props[lio->ifidx].napi_enabled = 1;
 918
 919                 oct->droq[0]->ops.poll_mode = 1;
 920         }
 921
 922         ifstate_set(lio, LIO_IFSTATE_RUNNING);
 923
 924         /* Ready for link status updates */
 925         lio->intf_open = 1;
 926
 927         netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
 928         start_txqs(netdev);
 929
 930         INIT_DELAYED_WORK(&lio->stats_wk.work, lio_fetch_stats);
 931         lio->stats_wk.ctxptr = lio;
 932         schedule_delayed_work(&lio->stats_wk.work, msecs_to_jiffies
 933                                         (LIQUIDIO_NDEV_STATS_POLL_TIME_MS));
 934
 935         /* tell Octeon to start forwarding packets to host */
 936         send_rx_ctrl_cmd(lio, 1);
 937
 938         dev_info(&oct->pci_dev->dev, "%s interface is opened\n", netdev->name);
 939
 940         return 0;
 941 }
 942
 943 /**
 944  * \brief Net device stop for LiquidIO
 945  * @param netdev network device
 946  */
 947 static int liquidio_stop(struct net_device *netdev)
 948 {
 949         struct lio *lio = GET_LIO(netdev);
 950         struct octeon_device *oct = lio->oct_dev;
 951         struct octeon_device_priv *oct_priv =
 952                 (struct octeon_device_priv *)oct->priv;
 953         struct napi_struct *napi, *n;
 954
 955         /* tell Octeon to stop forwarding packets to host */
 956         send_rx_ctrl_cmd(lio, 0);
 957
 958         netif_info(lio, ifdown, lio->netdev, "Stopping interface!\n");
 959         /* Inform that netif carrier is down */
 960         lio->intf_open = 0;
 961         lio->linfo.link.s.link_up = 0;
 962
 963         netif_carrier_off(netdev);
 964         lio->link_changes++;
 965
 966         ifstate_reset(lio, LIO_IFSTATE_RUNNING);
 967
 968         stop_txqs(netdev);
 969
 970         /* Wait for any pending Rx descriptors */
 971         if (lio_wait_for_clean_oq(oct))
 972                 netif_info(lio, rx_err, lio->netdev,
 973                            "Proceeding with stop interface after partial RX desc processing\n");
 974
 975         if (oct->props[lio->ifidx].napi_enabled == 1) {
 976                 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
 977                         napi_disable(napi);
 978
 979                 oct->props[lio->ifidx].napi_enabled = 0;
 980
 981                 oct->droq[0]->ops.poll_mode = 0;
 982
 983                 tasklet_enable(&oct_priv->droq_tasklet);
 984         }
 985
 986         cancel_delayed_work_sync(&lio->stats_wk.work);
 987
 988         dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
 989
 990         return 0;
 991 }
 992
 993 /**
 994  * \brief Converts a mask based on net device flags
 995  * @param netdev network device
 996  *
 997  * This routine generates a octnet_ifflags mask from the net device flags
 998  * received from the OS.
 999  */
1000 static enum octnet_ifflags get_new_flags(struct net_device *netdev)
1001 {
1002         enum octnet_ifflags f = OCTNET_IFFLAG_UNICAST;
1003
1004         if (netdev->flags & IFF_PROMISC)
1005                 f |= OCTNET_IFFLAG_PROMISC;
1006
1007         if (netdev->flags & IFF_ALLMULTI)
1008                 f |= OCTNET_IFFLAG_ALLMULTI;
1009
1010         if (netdev->flags & IFF_MULTICAST) {
1011                 f |= OCTNET_IFFLAG_MULTICAST;
1012
1013                 /* Accept all multicast addresses if there are more than we
1014                  * can handle
1015                  */
1016                 if (netdev_mc_count(netdev) > MAX_OCTEON_MULTICAST_ADDR)
1017                         f |= OCTNET_IFFLAG_ALLMULTI;
1018         }
1019
1020         if (netdev->flags & IFF_BROADCAST)
1021                 f |= OCTNET_IFFLAG_BROADCAST;
1022
1023         return f;
1024 }
1025
1026 static void liquidio_set_uc_list(struct net_device *netdev)
1027 {
1028         struct lio *lio = GET_LIO(netdev);
1029         struct octeon_device *oct = lio->oct_dev;
1030         struct octnic_ctrl_pkt nctrl;
1031         struct netdev_hw_addr *ha;
1032         u64 *mac;
1033
1034         if (lio->netdev_uc_count == netdev_uc_count(netdev))
1035                 return;
1036
1037         if (netdev_uc_count(netdev) > MAX_NCTRL_UDD) {
1038                 dev_err(&oct->pci_dev->dev, "too many MAC addresses in netdev uc list\n");
1039                 return;
1040         }
1041
1042         lio->netdev_uc_count = netdev_uc_count(netdev);
1043
1044         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1045         nctrl.ncmd.s.cmd = OCTNET_CMD_SET_UC_LIST;
1046         nctrl.ncmd.s.more = lio->netdev_uc_count;
1047         nctrl.ncmd.s.param1 = oct->vf_num;
1048         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1049         nctrl.netpndev = (u64)netdev;
1050         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1051
1052         /* copy all the addresses into the udd */
1053         mac = &nctrl.udd[0];
1054         netdev_for_each_uc_addr(ha, netdev) {
1055                 ether_addr_copy(((u8 *)mac) + 2, ha->addr);
1056                 mac++;
1057         }
1058
1059         octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1060 }
1061
1062 /**
1063  * \brief Net device set_multicast_list
1064  * @param netdev network device
1065  */
1066 static void liquidio_set_mcast_list(struct net_device *netdev)
1067 {
1068         int mc_count = min(netdev_mc_count(netdev), MAX_OCTEON_MULTICAST_ADDR);
1069         struct lio *lio = GET_LIO(netdev);
1070         struct octeon_device *oct = lio->oct_dev;
1071         struct octnic_ctrl_pkt nctrl;
1072         struct netdev_hw_addr *ha;
1073         u64 *mc;
1074         int ret;
1075
1076         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1077
1078         /* Create a ctrl pkt command to be sent to core app. */
1079         nctrl.ncmd.u64 = 0;
1080         nctrl.ncmd.s.cmd = OCTNET_CMD_SET_MULTI_LIST;
1081         nctrl.ncmd.s.param1 = get_new_flags(netdev);
1082         nctrl.ncmd.s.param2 = mc_count;
1083         nctrl.ncmd.s.more = mc_count;
1084         nctrl.netpndev = (u64)netdev;
1085         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1086
1087         /* copy all the addresses into the udd */
1088         mc = &nctrl.udd[0];
1089         netdev_for_each_mc_addr(ha, netdev) {
1090                 *mc = 0;
1091                 ether_addr_copy(((u8 *)mc) + 2, ha->addr);
1092                 /* no need to swap bytes */
1093                 if (++mc > &nctrl.udd[mc_count])
1094                         break;
1095         }
1096
1097         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1098
1099         /* Apparently, any activity in this call from the kernel has to
1100          * be atomic. So we won't wait for response.
1101          */
1102
1103         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1104         if (ret) {
1105                 dev_err(&oct->pci_dev->dev, "DEVFLAGS change failed in core (ret: 0x%x)\n",
1106                         ret);
1107         }
1108
1109         liquidio_set_uc_list(netdev);
1110 }
1111
1112 /**
1113  * \brief Net device set_mac_address
1114  * @param netdev network device
1115  */
1116 static int liquidio_set_mac(struct net_device *netdev, void *p)
1117 {
1118         struct sockaddr *addr = (struct sockaddr *)p;
1119         struct lio *lio = GET_LIO(netdev);
1120         struct octeon_device *oct = lio->oct_dev;
1121         struct octnic_ctrl_pkt nctrl;
1122         int ret = 0;
1123
1124         if (!is_valid_ether_addr(addr->sa_data))
1125                 return -EADDRNOTAVAIL;
1126
1127         if (ether_addr_equal(addr->sa_data, netdev->dev_addr))
1128                 return 0;
1129
1130         if (lio->linfo.macaddr_is_admin_asgnd)
1131                 return -EPERM;
1132
1133         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1134
1135         nctrl.ncmd.u64 = 0;
1136         nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
1137         nctrl.ncmd.s.param1 = 0;
1138         nctrl.ncmd.s.more = 1;
1139         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1140         nctrl.netpndev = (u64)netdev;
1141
1142         nctrl.udd[0] = 0;
1143         /* The MAC Address is presented in network byte order. */
1144         ether_addr_copy((u8 *)&nctrl.udd[0] + 2, addr->sa_data);
1145
1146         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1147         if (ret < 0) {
1148                 dev_err(&oct->pci_dev->dev, "MAC Address change failed\n");
1149                 return -ENOMEM;
1150         }
1151
1152         if (nctrl.sc_status ==
1153             FIRMWARE_STATUS_CODE(OCTEON_REQUEST_NO_PERMISSION)) {
1154                 dev_err(&oct->pci_dev->dev, "MAC Address change failed: no permission\n");
1155                 return -EPERM;
1156         }
1157
1158         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1159         ether_addr_copy(((u8 *)&lio->linfo.hw_addr) + 2, addr->sa_data);
1160
1161         return 0;
1162 }
1163
1164 static void
1165 liquidio_get_stats64(struct net_device *netdev,
1166                      struct rtnl_link_stats64 *lstats)
1167 {
1168         struct lio *lio = GET_LIO(netdev);
1169         struct octeon_device *oct;
1170         u64 pkts = 0, drop = 0, bytes = 0;
1171         struct oct_droq_stats *oq_stats;
1172         struct oct_iq_stats *iq_stats;
1173         int i, iq_no, oq_no;
1174
1175         oct = lio->oct_dev;
1176
1177         if (ifstate_check(lio, LIO_IFSTATE_RESETTING))
1178                 return;
1179
1180         for (i = 0; i < oct->num_iqs; i++) {
1181                 iq_no = lio->linfo.txpciq[i].s.q_no;
1182                 iq_stats = &oct->instr_queue[iq_no]->stats;
1183                 pkts += iq_stats->tx_done;
1184                 drop += iq_stats->tx_dropped;
1185                 bytes += iq_stats->tx_tot_bytes;
1186         }
1187
1188         lstats->tx_packets = pkts;
1189         lstats->tx_bytes = bytes;
1190         lstats->tx_dropped = drop;
1191
1192         pkts = 0;
1193         drop = 0;
1194         bytes = 0;
1195
1196         for (i = 0; i < oct->num_oqs; i++) {
1197                 oq_no = lio->linfo.rxpciq[i].s.q_no;
1198                 oq_stats = &oct->droq[oq_no]->stats;
1199                 pkts += oq_stats->rx_pkts_received;
1200                 drop += (oq_stats->rx_dropped +
1201                          oq_stats->dropped_nodispatch +
1202                          oq_stats->dropped_toomany +
1203                          oq_stats->dropped_nomem);
1204                 bytes += oq_stats->rx_bytes_received;
1205         }
1206
1207         lstats->rx_bytes = bytes;
1208         lstats->rx_packets = pkts;
1209         lstats->rx_dropped = drop;
1210
1211         lstats->multicast = oct->link_stats.fromwire.fw_total_mcast;
1212
1213         /* detailed rx_errors: */
1214         lstats->rx_length_errors = oct->link_stats.fromwire.l2_err;
1215         /* recved pkt with crc error */
1216         lstats->rx_crc_errors = oct->link_stats.fromwire.fcs_err;
1217         /* recv'd frame alignment error */
1218         lstats->rx_frame_errors = oct->link_stats.fromwire.frame_err;
1219
1220         lstats->rx_errors = lstats->rx_length_errors + lstats->rx_crc_errors +
1221                             lstats->rx_frame_errors;
1222
1223         /* detailed tx_errors */
1224         lstats->tx_aborted_errors = oct->link_stats.fromhost.fw_err_pko;
1225         lstats->tx_carrier_errors = oct->link_stats.fromhost.fw_err_link;
1226
1227         lstats->tx_errors = lstats->tx_aborted_errors +
1228                 lstats->tx_carrier_errors;
1229 }
1230
1231 /**
1232  * \brief Handler for SIOCSHWTSTAMP ioctl
1233  * @param netdev network device
1234  * @param ifr interface request
1235  * @param cmd command
1236  */
1237 static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
1238 {
1239         struct lio *lio = GET_LIO(netdev);
1240         struct hwtstamp_config conf;
1241
1242         if (copy_from_user(&conf, ifr->ifr_data, sizeof(conf)))
1243                 return -EFAULT;
1244
1245         if (conf.flags)
1246                 return -EINVAL;
1247
1248         switch (conf.tx_type) {
1249         case HWTSTAMP_TX_ON:
1250         case HWTSTAMP_TX_OFF:
1251                 break;
1252         default:
1253                 return -ERANGE;
1254         }
1255
1256         switch (conf.rx_filter) {
1257         case HWTSTAMP_FILTER_NONE:
1258                 break;
1259         case HWTSTAMP_FILTER_ALL:
1260         case HWTSTAMP_FILTER_SOME:
1261         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1262         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1263         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1264         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1265         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1266         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1267         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1268         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1269         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1270         case HWTSTAMP_FILTER_PTP_V2_EVENT:
1271         case HWTSTAMP_FILTER_PTP_V2_SYNC:
1272         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1273         case HWTSTAMP_FILTER_NTP_ALL:
1274                 conf.rx_filter = HWTSTAMP_FILTER_ALL;
1275                 break;
1276         default:
1277                 return -ERANGE;
1278         }
1279
1280         if (conf.rx_filter == HWTSTAMP_FILTER_ALL)
1281                 ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1282
1283         else
1284                 ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1285
1286         return copy_to_user(ifr->ifr_data, &conf, sizeof(conf)) ? -EFAULT : 0;
1287 }
1288
1289 /**
1290  * \brief ioctl handler
1291  * @param netdev network device
1292  * @param ifr interface request
1293  * @param cmd command
1294  */
1295 static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1296 {
1297         switch (cmd) {
1298         case SIOCSHWTSTAMP:
1299                 return hwtstamp_ioctl(netdev, ifr);
1300         default:
1301                 return -EOPNOTSUPP;
1302         }
1303 }
1304
1305 static void handle_timestamp(struct octeon_device *oct, u32 status, void *buf)
1306 {
1307         struct sk_buff *skb = (struct sk_buff *)buf;
1308         struct octnet_buf_free_info *finfo;
1309         struct oct_timestamp_resp *resp;
1310         struct octeon_soft_command *sc;
1311         struct lio *lio;
1312
1313         finfo = (struct octnet_buf_free_info *)skb->cb;
1314         lio = finfo->lio;
1315         sc = finfo->sc;
1316         oct = lio->oct_dev;
1317         resp = (struct oct_timestamp_resp *)sc->virtrptr;
1318
1319         if (status != OCTEON_REQUEST_DONE) {
1320                 dev_err(&oct->pci_dev->dev, "Tx timestamp instruction failed. Status: %llx\n",
1321                         CVM_CAST64(status));
1322                 resp->timestamp = 0;
1323         }
1324
1325         octeon_swap_8B_data(&resp->timestamp, 1);
1326
1327         if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
1328                 struct skb_shared_hwtstamps ts;
1329                 u64 ns = resp->timestamp;
1330
1331                 netif_info(lio, tx_done, lio->netdev,
1332                            "Got resulting SKBTX_HW_TSTAMP skb=%p ns=%016llu\n",
1333                            skb, (unsigned long long)ns);
1334                 ts.hwtstamp = ns_to_ktime(ns + lio->ptp_adjust);
1335                 skb_tstamp_tx(skb, &ts);
1336         }
1337
1338         octeon_free_soft_command(oct, sc);
1339         tx_buffer_free(skb);
1340 }
1341
1342 /* \brief Send a data packet that will be timestamped
1343  * @param oct octeon device
1344  * @param ndata pointer to network data
1345  * @param finfo pointer to private network data
1346  */
1347 static int send_nic_timestamp_pkt(struct octeon_device *oct,
1348                                   struct octnic_data_pkt *ndata,
1349                                   struct octnet_buf_free_info *finfo,
1350                                   int xmit_more)
1351 {
1352         struct octeon_soft_command *sc;
1353         int ring_doorbell;
1354         struct lio *lio;
1355         int retval;
1356         u32 len;
1357
1358         lio = finfo->lio;
1359
1360         sc = octeon_alloc_soft_command_resp(oct, &ndata->cmd,
1361                                             sizeof(struct oct_timestamp_resp));
1362         finfo->sc = sc;
1363
1364         if (!sc) {
1365                 dev_err(&oct->pci_dev->dev, "No memory for timestamped data packet\n");
1366                 return IQ_SEND_FAILED;
1367         }
1368
1369         if (ndata->reqtype == REQTYPE_NORESP_NET)
1370                 ndata->reqtype = REQTYPE_RESP_NET;
1371         else if (ndata->reqtype == REQTYPE_NORESP_NET_SG)
1372                 ndata->reqtype = REQTYPE_RESP_NET_SG;
1373
1374         sc->callback = handle_timestamp;
1375         sc->callback_arg = finfo->skb;
1376         sc->iq_no = ndata->q_no;
1377
1378         len = (u32)((struct octeon_instr_ih3 *)(&sc->cmd.cmd3.ih3))->dlengsz;
1379
1380         ring_doorbell = !xmit_more;
1381
1382         retval = octeon_send_command(oct, sc->iq_no, ring_doorbell, &sc->cmd,
1383                                      sc, len, ndata->reqtype);
1384
1385         if (retval == IQ_SEND_FAILED) {
1386                 dev_err(&oct->pci_dev->dev, "timestamp data packet failed status: %x\n",
1387                         retval);
1388                 octeon_free_soft_command(oct, sc);
1389         } else {
1390                 netif_info(lio, tx_queued, lio->netdev, "Queued timestamp packet\n");
1391         }
1392
1393         return retval;
1394 }
1395
1396 /** \brief Transmit networks packets to the Octeon interface
1397  * @param skbuff   skbuff struct to be passed to network layer.
1398  * @param netdev   pointer to network device
1399  * @returns whether the packet was transmitted to the device okay or not
1400  *             (NETDEV_TX_OK or NETDEV_TX_BUSY)
1401  */
1402 static netdev_tx_t liquidio_xmit(struct sk_buff *skb, struct net_device *netdev)
1403 {
1404         struct octnet_buf_free_info *finfo;
1405         union octnic_cmd_setup cmdsetup;
1406         struct octnic_data_pkt ndata;
1407         struct octeon_instr_irh *irh;
1408         struct oct_iq_stats *stats;
1409         struct octeon_device *oct;
1410         int q_idx = 0, iq_no = 0;
1411         union tx_info *tx_info;
1412         int xmit_more = 0;
1413         struct lio *lio;
1414         int status = 0;
1415         u64 dptr = 0;
1416         u32 tag = 0;
1417         int j;
1418
1419         lio = GET_LIO(netdev);
1420         oct = lio->oct_dev;
1421
1422         q_idx = skb_iq(lio->oct_dev, skb);
1423         tag = q_idx;
1424         iq_no = lio->linfo.txpciq[q_idx].s.q_no;
1425
1426         stats = &oct->instr_queue[iq_no]->stats;
1427
1428         /* Check for all conditions in which the current packet cannot be
1429          * transmitted.
1430          */
1431         if (!(atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING) ||
1432             (!lio->linfo.link.s.link_up) || (skb->len <= 0)) {
1433                 netif_info(lio, tx_err, lio->netdev, "Transmit failed link_status : %d\n",
1434                            lio->linfo.link.s.link_up);
1435                 goto lio_xmit_failed;
1436         }
1437
1438         /* Use space in skb->cb to store info used to unmap and
1439          * free the buffers.
1440          */
1441         finfo = (struct octnet_buf_free_info *)skb->cb;
1442         finfo->lio = lio;
1443         finfo->skb = skb;
1444         finfo->sc = NULL;
1445
1446         /* Prepare the attributes for the data to be passed to OSI. */
1447         memset(&ndata, 0, sizeof(struct octnic_data_pkt));
1448
1449         ndata.buf = finfo;
1450
1451         ndata.q_no = iq_no;
1452
1453         if (octnet_iq_is_full(oct, ndata.q_no)) {
1454                 /* defer sending if queue is full */
1455                 netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
1456                            ndata.q_no);
1457                 stats->tx_iq_busy++;
1458                 return NETDEV_TX_BUSY;
1459         }
1460
1461         ndata.datasize = skb->len;
1462
1463         cmdsetup.u64 = 0;
1464         cmdsetup.s.iq_no = iq_no;
1465
1466         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1467                 if (skb->encapsulation) {
1468                         cmdsetup.s.tnl_csum = 1;
1469                         stats->tx_vxlan++;
1470                 } else {
1471                         cmdsetup.s.transport_csum = 1;
1472                 }
1473         }
1474         if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
1475                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1476                 cmdsetup.s.timestamp = 1;
1477         }
1478
1479         if (!skb_shinfo(skb)->nr_frags) {
1480                 cmdsetup.s.u.datasize = skb->len;
1481                 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1482                 /* Offload checksum calculation for TCP/UDP packets */
1483                 dptr = dma_map_single(&oct->pci_dev->dev,
1484                                       skb->data,
1485                                       skb->len,
1486                                       DMA_TO_DEVICE);
1487                 if (dma_mapping_error(&oct->pci_dev->dev, dptr)) {
1488                         dev_err(&oct->pci_dev->dev, "%s DMA mapping error 1\n",
1489                                 __func__);
1490                         return NETDEV_TX_BUSY;
1491                 }
1492
1493                 ndata.cmd.cmd3.dptr = dptr;
1494                 finfo->dptr = dptr;
1495                 ndata.reqtype = REQTYPE_NORESP_NET;
1496
1497         } else {
1498                 skb_frag_t *frag;
1499                 struct octnic_gather *g;
1500                 int i, frags;
1501
1502                 spin_lock(&lio->glist_lock[q_idx]);
1503                 g = (struct octnic_gather *)
1504                         lio_list_delete_head(&lio->glist[q_idx]);
1505                 spin_unlock(&lio->glist_lock[q_idx]);
1506
1507                 if (!g) {
1508                         netif_info(lio, tx_err, lio->netdev,
1509                                    "Transmit scatter gather: glist null!\n");
1510                         goto lio_xmit_failed;
1511                 }
1512
1513                 cmdsetup.s.gather = 1;
1514                 cmdsetup.s.u.gatherptrs = (skb_shinfo(skb)->nr_frags + 1);
1515                 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1516
1517                 memset(g->sg, 0, g->sg_size);
1518
1519                 g->sg[0].ptr[0] = dma_map_single(&oct->pci_dev->dev,
1520                                                  skb->data,
1521                                                  (skb->len - skb->data_len),
1522                                                  DMA_TO_DEVICE);
1523                 if (dma_mapping_error(&oct->pci_dev->dev, g->sg[0].ptr[0])) {
1524                         dev_err(&oct->pci_dev->dev, "%s DMA mapping error 2\n",
1525                                 __func__);
1526                         return NETDEV_TX_BUSY;
1527                 }
1528                 add_sg_size(&g->sg[0], (skb->len - skb->data_len), 0);
1529
1530                 frags = skb_shinfo(skb)->nr_frags;
1531                 i = 1;
1532                 while (frags--) {
1533                         frag = &skb_shinfo(skb)->frags[i - 1];
1534
1535                         g->sg[(i >> 2)].ptr[(i & 3)] =
1536                                 skb_frag_dma_map(&oct->pci_dev->dev,
1537                                                  frag, 0, skb_frag_size(frag),
1538                                                  DMA_TO_DEVICE);
1539                         if (dma_mapping_error(&oct->pci_dev->dev,
1540                                               g->sg[i >> 2].ptr[i & 3])) {
1541                                 dma_unmap_single(&oct->pci_dev->dev,
1542                                                  g->sg[0].ptr[0],
1543                                                  skb->len - skb->data_len,
1544                                                  DMA_TO_DEVICE);
1545                                 for (j = 1; j < i; j++) {
1546                                         frag = &skb_shinfo(skb)->frags[j - 1];
1547                                         dma_unmap_page(&oct->pci_dev->dev,
1548                                                        g->sg[j >> 2].ptr[j & 3],
1549                                                        skb_frag_size(frag),
1550                                                        DMA_TO_DEVICE);
1551                                 }
1552                                 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 3\n",
1553                                         __func__);
1554                                 return NETDEV_TX_BUSY;
1555                         }
1556
1557                         add_sg_size(&g->sg[(i >> 2)], skb_frag_size(frag),
1558                                     (i & 3));
1559                         i++;
1560                 }
1561
1562                 dptr = g->sg_dma_ptr;
1563
1564                 ndata.cmd.cmd3.dptr = dptr;
1565                 finfo->dptr = dptr;
1566                 finfo->g = g;
1567
1568                 ndata.reqtype = REQTYPE_NORESP_NET_SG;
1569         }
1570
1571         irh = (struct octeon_instr_irh *)&ndata.cmd.cmd3.irh;
1572         tx_info = (union tx_info *)&ndata.cmd.cmd3.ossp[0];
1573
1574         if (skb_shinfo(skb)->gso_size) {
1575                 tx_info->s.gso_size = skb_shinfo(skb)->gso_size;
1576                 tx_info->s.gso_segs = skb_shinfo(skb)->gso_segs;
1577         }
1578
1579         /* HW insert VLAN tag */
1580         if (skb_vlan_tag_present(skb)) {
1581                 irh->priority = skb_vlan_tag_get(skb) >> VLAN_PRIO_SHIFT;
1582                 irh->vlan = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
1583         }
1584
1585         xmit_more = netdev_xmit_more();
1586
1587         if (unlikely(cmdsetup.s.timestamp))
1588                 status = send_nic_timestamp_pkt(oct, &ndata, finfo, xmit_more);
1589         else
1590                 status = octnet_send_nic_data_pkt(oct, &ndata, xmit_more);
1591         if (status == IQ_SEND_FAILED)
1592                 goto lio_xmit_failed;
1593
1594         netif_info(lio, tx_queued, lio->netdev, "Transmit queued successfully\n");
1595
1596         if (status == IQ_SEND_STOP) {
1597                 dev_err(&oct->pci_dev->dev, "Rcvd IQ_SEND_STOP signal; stopping IQ-%d\n",
1598                         iq_no);
1599                 netif_stop_subqueue(netdev, q_idx);
1600         }
1601
1602         netif_trans_update(netdev);
1603
1604         if (tx_info->s.gso_segs)
1605                 stats->tx_done += tx_info->s.gso_segs;
1606         else
1607                 stats->tx_done++;
1608         stats->tx_tot_bytes += ndata.datasize;
1609
1610         return NETDEV_TX_OK;
1611
1612 lio_xmit_failed:
1613         stats->tx_dropped++;
1614         netif_info(lio, tx_err, lio->netdev, "IQ%d Transmit dropped:%llu\n",
1615                    iq_no, stats->tx_dropped);
1616         if (dptr)
1617                 dma_unmap_single(&oct->pci_dev->dev, dptr,
1618                                  ndata.datasize, DMA_TO_DEVICE);
1619
1620         octeon_ring_doorbell_locked(oct, iq_no);
1621
1622         tx_buffer_free(skb);
1623         return NETDEV_TX_OK;
1624 }
1625
1626 /** \brief Network device Tx timeout
1627  * @param netdev    pointer to network device
1628  */
1629 static void liquidio_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1630 {
1631         struct lio *lio;
1632
1633         lio = GET_LIO(netdev);
1634
1635         netif_info(lio, tx_err, lio->netdev,
1636                    "Transmit timeout tx_dropped:%ld, waking up queues now!!\n",
1637                    netdev->stats.tx_dropped);
1638         netif_trans_update(netdev);
1639         wake_txqs(netdev);
1640 }
1641
1642 static int
1643 liquidio_vlan_rx_add_vid(struct net_device *netdev,
1644                          __be16 proto __attribute__((unused)), u16 vid)
1645 {
1646         struct lio *lio = GET_LIO(netdev);
1647         struct octeon_device *oct = lio->oct_dev;
1648         struct octnic_ctrl_pkt nctrl;
1649         int ret = 0;
1650
1651         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1652
1653         nctrl.ncmd.u64 = 0;
1654         nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
1655         nctrl.ncmd.s.param1 = vid;
1656         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1657         nctrl.netpndev = (u64)netdev;
1658         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1659
1660         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1661         if (ret) {
1662                 dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
1663                         ret);
1664                 return -EPERM;
1665         }
1666
1667         return 0;
1668 }
1669
1670 static int
1671 liquidio_vlan_rx_kill_vid(struct net_device *netdev,
1672                           __be16 proto __attribute__((unused)), u16 vid)
1673 {
1674         struct lio *lio = GET_LIO(netdev);
1675         struct octeon_device *oct = lio->oct_dev;
1676         struct octnic_ctrl_pkt nctrl;
1677         int ret = 0;
1678
1679         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1680
1681         nctrl.ncmd.u64 = 0;
1682         nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;
1683         nctrl.ncmd.s.param1 = vid;
1684         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1685         nctrl.netpndev = (u64)netdev;
1686         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1687
1688         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1689         if (ret) {
1690                 dev_err(&oct->pci_dev->dev, "Del VLAN filter failed in core (ret: 0x%x)\n",
1691                         ret);
1692                 if (ret > 0)
1693                         ret = -EIO;
1694         }
1695         return ret;
1696 }
1697
1698 /** Sending command to enable/disable RX checksum offload
1699  * @param netdev                pointer to network device
1700  * @param command               OCTNET_CMD_TNL_RX_CSUM_CTL
1701  * @param rx_cmd_bit            OCTNET_CMD_RXCSUM_ENABLE/
1702  *                              OCTNET_CMD_RXCSUM_DISABLE
1703  * @returns                     SUCCESS or FAILURE
1704  */
1705 static int liquidio_set_rxcsum_command(struct net_device *netdev, int command,
1706                                        u8 rx_cmd)
1707 {
1708         struct lio *lio = GET_LIO(netdev);
1709         struct octeon_device *oct = lio->oct_dev;
1710         struct octnic_ctrl_pkt nctrl;
1711         int ret = 0;
1712
1713         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1714
1715         nctrl.ncmd.u64 = 0;
1716         nctrl.ncmd.s.cmd = command;
1717         nctrl.ncmd.s.param1 = rx_cmd;
1718         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1719         nctrl.netpndev = (u64)netdev;
1720         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1721
1722         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1723         if (ret) {
1724                 dev_err(&oct->pci_dev->dev, "DEVFLAGS RXCSUM change failed in core (ret:0x%x)\n",
1725                         ret);
1726                 if (ret > 0)
1727                         ret = -EIO;
1728         }
1729         return ret;
1730 }
1731
1732 /** Sending command to add/delete VxLAN UDP port to firmware
1733  * @param netdev                pointer to network device
1734  * @param command               OCTNET_CMD_VXLAN_PORT_CONFIG
1735  * @param vxlan_port            VxLAN port to be added or deleted
1736  * @param vxlan_cmd_bit         OCTNET_CMD_VXLAN_PORT_ADD,
1737  *                              OCTNET_CMD_VXLAN_PORT_DEL
1738  * @returns                     SUCCESS or FAILURE
1739  */
1740 static int liquidio_vxlan_port_command(struct net_device *netdev, int command,
1741                                        u16 vxlan_port, u8 vxlan_cmd_bit)
1742 {
1743         struct lio *lio = GET_LIO(netdev);
1744         struct octeon_device *oct = lio->oct_dev;
1745         struct octnic_ctrl_pkt nctrl;
1746         int ret = 0;
1747
1748         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1749
1750         nctrl.ncmd.u64 = 0;
1751         nctrl.ncmd.s.cmd = command;
1752         nctrl.ncmd.s.more = vxlan_cmd_bit;
1753         nctrl.ncmd.s.param1 = vxlan_port;
1754         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1755         nctrl.netpndev = (u64)netdev;
1756         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1757
1758         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1759         if (ret) {
1760                 dev_err(&oct->pci_dev->dev,
1761                         "DEVFLAGS VxLAN port add/delete failed in core (ret : 0x%x)\n",
1762                         ret);
1763                 if (ret > 0)
1764                         ret = -EIO;
1765         }
1766         return ret;
1767 }
1768
1769 static int liquidio_udp_tunnel_set_port(struct net_device *netdev,
1770                                         unsigned int table, unsigned int entry,
1771                                         struct udp_tunnel_info *ti)
1772 {
1773         return liquidio_vxlan_port_command(netdev,
1774                                            OCTNET_CMD_VXLAN_PORT_CONFIG,
1775                                            htons(ti->port),
1776                                            OCTNET_CMD_VXLAN_PORT_ADD);
1777 }
1778
1779 static int liquidio_udp_tunnel_unset_port(struct net_device *netdev,
1780                                           unsigned int table,
1781                                           unsigned int entry,
1782                                           struct udp_tunnel_info *ti)
1783 {
1784         return liquidio_vxlan_port_command(netdev,
1785                                            OCTNET_CMD_VXLAN_PORT_CONFIG,
1786                                            htons(ti->port),
1787                                            OCTNET_CMD_VXLAN_PORT_DEL);
1788 }
1789
1790 static const struct udp_tunnel_nic_info liquidio_udp_tunnels = {
1791         .set_port       = liquidio_udp_tunnel_set_port,
1792         .unset_port     = liquidio_udp_tunnel_unset_port,
1793         .tables         = {
1794                 { .n_entries = 1024, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, },
1795         },
1796 };
1797
1798 /** \brief Net device fix features
1799  * @param netdev  pointer to network device
1800  * @param request features requested
1801  * @returns updated features list
1802  */
1803 static netdev_features_t liquidio_fix_features(struct net_device *netdev,
1804                                                netdev_features_t request)
1805 {
1806         struct lio *lio = netdev_priv(netdev);
1807
1808         if ((request & NETIF_F_RXCSUM) &&
1809             !(lio->dev_capability & NETIF_F_RXCSUM))
1810                 request &= ~NETIF_F_RXCSUM;
1811
1812         if ((request & NETIF_F_HW_CSUM) &&
1813             !(lio->dev_capability & NETIF_F_HW_CSUM))
1814                 request &= ~NETIF_F_HW_CSUM;
1815
1816         if ((request & NETIF_F_TSO) && !(lio->dev_capability & NETIF_F_TSO))
1817                 request &= ~NETIF_F_TSO;
1818
1819         if ((request & NETIF_F_TSO6) && !(lio->dev_capability & NETIF_F_TSO6))
1820                 request &= ~NETIF_F_TSO6;
1821
1822         if ((request & NETIF_F_LRO) && !(lio->dev_capability & NETIF_F_LRO))
1823                 request &= ~NETIF_F_LRO;
1824
1825         /* Disable LRO if RXCSUM is off */
1826         if (!(request & NETIF_F_RXCSUM) && (netdev->features & NETIF_F_LRO) &&
1827             (lio->dev_capability & NETIF_F_LRO))
1828                 request &= ~NETIF_F_LRO;
1829
1830         return request;
1831 }
1832
1833 /** \brief Net device set features
1834  * @param netdev  pointer to network device
1835  * @param features features to enable/disable
1836  */
1837 static int liquidio_set_features(struct net_device *netdev,
1838                                  netdev_features_t features)
1839 {
1840         struct lio *lio = netdev_priv(netdev);
1841
1842         if (!((netdev->features ^ features) & NETIF_F_LRO))
1843                 return 0;
1844
1845         if ((features & NETIF_F_LRO) && (lio->dev_capability & NETIF_F_LRO))
1846                 liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
1847                                      OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1848         else if (!(features & NETIF_F_LRO) &&
1849                  (lio->dev_capability & NETIF_F_LRO))
1850                 liquidio_set_feature(netdev, OCTNET_CMD_LRO_DISABLE,
1851                                      OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1852         if (!(netdev->features & NETIF_F_RXCSUM) &&
1853             (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1854             (features & NETIF_F_RXCSUM))
1855                 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1856                                             OCTNET_CMD_RXCSUM_ENABLE);
1857         else if ((netdev->features & NETIF_F_RXCSUM) &&
1858                  (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1859                  !(features & NETIF_F_RXCSUM))
1860                 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1861                                             OCTNET_CMD_RXCSUM_DISABLE);
1862
1863         return 0;
1864 }
1865
1866 static const struct net_device_ops lionetdevops = {
1867         .ndo_open               = liquidio_open,
1868         .ndo_stop               = liquidio_stop,
1869         .ndo_start_xmit         = liquidio_xmit,
1870         .ndo_get_stats64        = liquidio_get_stats64,
1871         .ndo_set_mac_address    = liquidio_set_mac,
1872         .ndo_set_rx_mode        = liquidio_set_mcast_list,
1873         .ndo_tx_timeout         = liquidio_tx_timeout,
1874         .ndo_vlan_rx_add_vid    = liquidio_vlan_rx_add_vid,
1875         .ndo_vlan_rx_kill_vid   = liquidio_vlan_rx_kill_vid,
1876         .ndo_change_mtu         = liquidio_change_mtu,
1877         .ndo_do_ioctl           = liquidio_ioctl,
1878         .ndo_fix_features       = liquidio_fix_features,
1879         .ndo_set_features       = liquidio_set_features,
1880         .ndo_udp_tunnel_add     = udp_tunnel_nic_add_port,
1881         .ndo_udp_tunnel_del     = udp_tunnel_nic_del_port,
1882 };
1883
1884 static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
1885 {
1886         struct octeon_device *oct = (struct octeon_device *)buf;
1887         struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
1888         union oct_link_status *ls;
1889         int gmxport = 0;
1890         int i;
1891
1892         if (recv_pkt->buffer_size[0] != (sizeof(*ls) + OCT_DROQ_INFO_SIZE)) {
1893                 dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
1894                         recv_pkt->buffer_size[0],
1895                         recv_pkt->rh.r_nic_info.gmxport);
1896                 goto nic_info_err;
1897         }
1898
1899         gmxport = recv_pkt->rh.r_nic_info.gmxport;
1900         ls = (union oct_link_status *)(get_rbd(recv_pkt->buffer_ptr[0]) +
1901                 OCT_DROQ_INFO_SIZE);
1902
1903         octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
1904
1905         for (i = 0; i < oct->ifcount; i++) {
1906                 if (oct->props[i].gmxport == gmxport) {
1907                         update_link_status(oct->props[i].netdev, ls);
1908                         break;
1909                 }
1910         }
1911
1912 nic_info_err:
1913         for (i = 0; i < recv_pkt->buffer_count; i++)
1914                 recv_buffer_free(recv_pkt->buffer_ptr[i]);
1915         octeon_free_recv_info(recv_info);
1916         return 0;
1917 }
1918
1919 /**
1920  * \brief Setup network interfaces
1921  * @param octeon_dev  octeon device
1922  *
1923  * Called during init time for each device. It assumes the NIC
1924  * is already up and running.  The link information for each
1925  * interface is passed in link_info.
1926  */
1927 static int setup_nic_devices(struct octeon_device *octeon_dev)
1928 {
1929         int retval, num_iqueues, num_oqueues;
1930         u32 resp_size, data_size;
1931         struct liquidio_if_cfg_resp *resp;
1932         struct octeon_soft_command *sc;
1933         union oct_nic_if_cfg if_cfg;
1934         struct octdev_props *props;
1935         struct net_device *netdev;
1936         struct lio_version *vdata;
1937         struct lio *lio = NULL;
1938         u8 mac[ETH_ALEN], i, j;
1939         u32 ifidx_or_pfnum;
1940
1941         ifidx_or_pfnum = octeon_dev->pf_num;
1942
1943         /* This is to handle link status changes */
1944         octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC, OPCODE_NIC_INFO,
1945                                     lio_nic_info, octeon_dev);
1946
1947         /* REQTYPE_RESP_NET and REQTYPE_SOFT_COMMAND do not have free functions.
1948          * They are handled directly.
1949          */
1950         octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET,
1951                                         free_netbuf);
1952
1953         octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET_SG,
1954                                         free_netsgbuf);
1955
1956         octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_RESP_NET_SG,
1957                                         free_netsgbuf_with_resp);
1958
1959         for (i = 0; i < octeon_dev->ifcount; i++) {
1960                 resp_size = sizeof(struct liquidio_if_cfg_resp);
1961                 data_size = sizeof(struct lio_version);
1962                 sc = (struct octeon_soft_command *)
1963                         octeon_alloc_soft_command(octeon_dev, data_size,
1964                                                   resp_size, 0);
1965                 resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
1966                 vdata = (struct lio_version *)sc->virtdptr;
1967
1968                 *((u64 *)vdata) = 0;
1969                 vdata->major = cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
1970                 vdata->minor = cpu_to_be16(LIQUIDIO_BASE_MINOR_VERSION);
1971                 vdata->micro = cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);
1972
1973                 if_cfg.u64 = 0;
1974
1975                 if_cfg.s.num_iqueues = octeon_dev->sriov_info.rings_per_vf;
1976                 if_cfg.s.num_oqueues = octeon_dev->sriov_info.rings_per_vf;
1977                 if_cfg.s.base_queue = 0;
1978
1979                 sc->iq_no = 0;
1980
1981                 octeon_prepare_soft_command(octeon_dev, sc, OPCODE_NIC,
1982                                             OPCODE_NIC_IF_CFG, 0, if_cfg.u64,
1983                                             0);
1984
1985                 init_completion(&sc->complete);
1986                 sc->sc_status = OCTEON_REQUEST_PENDING;
1987
1988                 retval = octeon_send_soft_command(octeon_dev, sc);
1989                 if (retval == IQ_SEND_FAILED) {
1990                         dev_err(&octeon_dev->pci_dev->dev,
1991                                 "iq/oq config failed status: %x\n", retval);
1992                         /* Soft instr is freed by driver in case of failure. */
1993                         octeon_free_soft_command(octeon_dev, sc);
1994                         return(-EIO);
1995                 }
1996
1997                 /* Sleep on a wait queue till the cond flag indicates that the
1998                  * response arrived or timed-out.
1999                  */
2000                 retval = wait_for_sc_completion_timeout(octeon_dev, sc, 0);
2001                 if (retval)
2002                         return retval;
2003
2004                 retval = resp->status;
2005                 if (retval) {
2006                         dev_err(&octeon_dev->pci_dev->dev,
2007                                 "iq/oq config failed, retval = %d\n", retval);
2008                         WRITE_ONCE(sc->caller_is_done, true);
2009                         return -EIO;
2010                 }
2011
2012                 snprintf(octeon_dev->fw_info.liquidio_firmware_version,
2013                          32, "%s",
2014                          resp->cfg_info.liquidio_firmware_version);
2015
2016                 octeon_swap_8B_data((u64 *)(&resp->cfg_info),
2017                                     (sizeof(struct liquidio_if_cfg_info)) >> 3);
2018
2019                 num_iqueues = hweight64(resp->cfg_info.iqmask);
2020                 num_oqueues = hweight64(resp->cfg_info.oqmask);
2021
2022                 if (!(num_iqueues) || !(num_oqueues)) {
2023                         dev_err(&octeon_dev->pci_dev->dev,
2024                                 "Got bad iqueues (%016llx) or oqueues (%016llx) from firmware.\n",
2025                                 resp->cfg_info.iqmask, resp->cfg_info.oqmask);
2026                         WRITE_ONCE(sc->caller_is_done, true);
2027                         goto setup_nic_dev_done;
2028                 }
2029                 dev_dbg(&octeon_dev->pci_dev->dev,
2030                         "interface %d, iqmask %016llx, oqmask %016llx, numiqueues %d, numoqueues %d\n",
2031                         i, resp->cfg_info.iqmask, resp->cfg_info.oqmask,
2032                         num_iqueues, num_oqueues);
2033
2034                 netdev = alloc_etherdev_mq(LIO_SIZE, num_iqueues);
2035
2036                 if (!netdev) {
2037                         dev_err(&octeon_dev->pci_dev->dev, "Device allocation failed\n");
2038                         WRITE_ONCE(sc->caller_is_done, true);
2039                         goto setup_nic_dev_done;
2040                 }
2041
2042                 SET_NETDEV_DEV(netdev, &octeon_dev->pci_dev->dev);
2043
2044                 /* Associate the routines that will handle different
2045                  * netdev tasks.
2046                  */
2047                 netdev->netdev_ops = &lionetdevops;
2048
2049                 lio = GET_LIO(netdev);
2050
2051                 memset(lio, 0, sizeof(struct lio));
2052
2053                 lio->ifidx = ifidx_or_pfnum;
2054
2055                 props = &octeon_dev->props[i];
2056                 props->gmxport = resp->cfg_info.linfo.gmxport;
2057                 props->netdev = netdev;
2058
2059                 lio->linfo.num_rxpciq = num_oqueues;
2060                 lio->linfo.num_txpciq = num_iqueues;
2061
2062                 for (j = 0; j < num_oqueues; j++) {
2063                         lio->linfo.rxpciq[j].u64 =
2064                             resp->cfg_info.linfo.rxpciq[j].u64;
2065                 }
2066                 for (j = 0; j < num_iqueues; j++) {
2067                         lio->linfo.txpciq[j].u64 =
2068                             resp->cfg_info.linfo.txpciq[j].u64;
2069                 }
2070
2071                 lio->linfo.hw_addr = resp->cfg_info.linfo.hw_addr;
2072                 lio->linfo.gmxport = resp->cfg_info.linfo.gmxport;
2073                 lio->linfo.link.u64 = resp->cfg_info.linfo.link.u64;
2074                 lio->linfo.macaddr_is_admin_asgnd =
2075                         resp->cfg_info.linfo.macaddr_is_admin_asgnd;
2076                 lio->linfo.macaddr_spoofchk =
2077                         resp->cfg_info.linfo.macaddr_spoofchk;
2078
2079                 lio->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2080
2081                 lio->dev_capability = NETIF_F_HIGHDMA
2082                                       | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
2083                                       | NETIF_F_SG | NETIF_F_RXCSUM
2084                                       | NETIF_F_TSO | NETIF_F_TSO6
2085                                       | NETIF_F_GRO
2086                                       | NETIF_F_LRO;
2087                 netif_set_gso_max_size(netdev, OCTNIC_GSO_MAX_SIZE);
2088
2089                 /* Copy of transmit encapsulation capabilities:
2090                  * TSO, TSO6, Checksums for this device
2091                  */
2092                 lio->enc_dev_capability = NETIF_F_IP_CSUM
2093                                           | NETIF_F_IPV6_CSUM
2094                                           | NETIF_F_GSO_UDP_TUNNEL
2095                                           | NETIF_F_HW_CSUM | NETIF_F_SG
2096                                           | NETIF_F_RXCSUM
2097                                           | NETIF_F_TSO | NETIF_F_TSO6
2098                                           | NETIF_F_LRO;
2099
2100                 netdev->hw_enc_features =
2101                     (lio->enc_dev_capability & ~NETIF_F_LRO);
2102                 netdev->udp_tunnel_nic_info = &liquidio_udp_tunnels;
2103
2104                 netdev->vlan_features = lio->dev_capability;
2105                 /* Add any unchangeable hw features */
2106                 lio->dev_capability |= NETIF_F_HW_VLAN_CTAG_FILTER |
2107                                        NETIF_F_HW_VLAN_CTAG_RX |
2108                                        NETIF_F_HW_VLAN_CTAG_TX;
2109
2110                 netdev->features = (lio->dev_capability & ~NETIF_F_LRO);
2111
2112                 netdev->hw_features = lio->dev_capability;
2113                 netdev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
2114
2115                 /* MTU range: 68 - 16000 */
2116                 netdev->min_mtu = LIO_MIN_MTU_SIZE;
2117                 netdev->max_mtu = LIO_MAX_MTU_SIZE;
2118
2119                 WRITE_ONCE(sc->caller_is_done, true);
2120
2121                 /* Point to the  properties for octeon device to which this
2122                  * interface belongs.
2123                  */
2124                 lio->oct_dev = octeon_dev;
2125                 lio->octprops = props;
2126                 lio->netdev = netdev;
2127
2128                 dev_dbg(&octeon_dev->pci_dev->dev,
2129                         "if%d gmx: %d hw_addr: 0x%llx\n", i,
2130                         lio->linfo.gmxport, CVM_CAST64(lio->linfo.hw_addr));
2131
2132                 /* 64-bit swap required on LE machines */
2133                 octeon_swap_8B_data(&lio->linfo.hw_addr, 1);
2134                 for (j = 0; j < ETH_ALEN; j++)
2135                         mac[j] = *((u8 *)(((u8 *)&lio->linfo.hw_addr) + 2 + j));
2136
2137                 /* Copy MAC Address to OS network device structure */
2138                 ether_addr_copy(netdev->dev_addr, mac);
2139
2140                 if (liquidio_setup_io_queues(octeon_dev, i,
2141                                              lio->linfo.num_txpciq,
2142                                              lio->linfo.num_rxpciq)) {
2143                         dev_err(&octeon_dev->pci_dev->dev, "I/O queues creation failed\n");
2144                         goto setup_nic_dev_free;
2145                 }
2146
2147                 ifstate_set(lio, LIO_IFSTATE_DROQ_OPS);
2148
2149                 /* For VFs, enable Octeon device interrupts here,
2150                  * as this is contingent upon IO queue setup
2151                  */
2152                 octeon_dev->fn_list.enable_interrupt(octeon_dev,
2153                                                      OCTEON_ALL_INTR);
2154
2155                 /* By default all interfaces on a single Octeon uses the same
2156                  * tx and rx queues
2157                  */
2158                 lio->txq = lio->linfo.txpciq[0].s.q_no;
2159                 lio->rxq = lio->linfo.rxpciq[0].s.q_no;
2160
2161                 lio->tx_qsize = octeon_get_tx_qsize(octeon_dev, lio->txq);
2162                 lio->rx_qsize = octeon_get_rx_qsize(octeon_dev, lio->rxq);
2163
2164                 if (lio_setup_glists(octeon_dev, lio, num_iqueues)) {
2165                         dev_err(&octeon_dev->pci_dev->dev,
2166                                 "Gather list allocation failed\n");
2167                         goto setup_nic_dev_free;
2168                 }
2169
2170                 /* Register ethtool support */
2171                 liquidio_set_ethtool_ops(netdev);
2172                 if (lio->oct_dev->chip_id == OCTEON_CN23XX_VF_VID)
2173                         octeon_dev->priv_flags = OCT_PRIV_FLAG_DEFAULT;
2174                 else
2175                         octeon_dev->priv_flags = 0x0;
2176
2177                 if (netdev->features & NETIF_F_LRO)
2178                         liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
2179                                              OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
2180
2181                 if (setup_link_status_change_wq(netdev))
2182                         goto setup_nic_dev_free;
2183
2184                 if (setup_rx_oom_poll_fn(netdev))
2185                         goto setup_nic_dev_free;
2186
2187                 /* Register the network device with the OS */
2188                 if (register_netdev(netdev)) {
2189                         dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
2190                         goto setup_nic_dev_free;
2191                 }
2192
2193                 dev_dbg(&octeon_dev->pci_dev->dev,
2194                         "Setup NIC ifidx:%d mac:%02x%02x%02x%02x%02x%02x\n",
2195                         i, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2196                 netif_carrier_off(netdev);
2197                 lio->link_changes++;
2198
2199                 ifstate_set(lio, LIO_IFSTATE_REGISTERED);
2200
2201                 /* Sending command to firmware to enable Rx checksum offload
2202                  * by default at the time of setup of Liquidio driver for
2203                  * this device
2204                  */
2205                 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
2206                                             OCTNET_CMD_RXCSUM_ENABLE);
2207                 liquidio_set_feature(netdev, OCTNET_CMD_TNL_TX_CSUM_CTL,
2208                                      OCTNET_CMD_TXCSUM_ENABLE);
2209
2210                 dev_dbg(&octeon_dev->pci_dev->dev,
2211                         "NIC ifidx:%d Setup successful\n", i);
2212
2213                 octeon_dev->no_speed_setting = 1;
2214         }
2215
2216         return 0;
2217
2218 setup_nic_dev_free:
2219
2220         while (i--) {
2221                 dev_err(&octeon_dev->pci_dev->dev,
2222                         "NIC ifidx:%d Setup failed\n", i);
2223                 liquidio_destroy_nic_device(octeon_dev, i);
2224         }
2225
2226 setup_nic_dev_done:
2227
2228         return -ENODEV;
2229 }
2230
2231 /**
2232  * \brief initialize the NIC
2233  * @param oct octeon device
2234  *
2235  * This initialization routine is called once the Octeon device application is
2236  * up and running
2237  */
2238 static int liquidio_init_nic_module(struct octeon_device *oct)
2239 {
2240         int num_nic_ports = 1;
2241         int i, retval = 0;
2242
2243         dev_dbg(&oct->pci_dev->dev, "Initializing network interfaces\n");
2244
2245         /* only default iq and oq were initialized
2246          * initialize the rest as well run port_config command for each port
2247          */
2248         oct->ifcount = num_nic_ports;
2249         memset(oct->props, 0,
2250                sizeof(struct octdev_props) * num_nic_ports);
2251
2252         for (i = 0; i < MAX_OCTEON_LINKS; i++)
2253                 oct->props[i].gmxport = -1;
2254
2255         retval = setup_nic_devices(oct);
2256         if (retval) {
2257                 dev_err(&oct->pci_dev->dev, "Setup NIC devices failed\n");
2258                 goto octnet_init_failure;
2259         }
2260
2261         dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n");
2262
2263         return retval;
2264
2265 octnet_init_failure:
2266
2267         oct->ifcount = 0;
2268
2269         return retval;
2270 }
2271
2272 /**
2273  * \brief Device initialization for each Octeon device that is probed
2274  * @param octeon_dev  octeon device
2275  */
2276 static int octeon_device_init(struct octeon_device *oct)
2277 {
2278         u32 rev_id;
2279         int j;
2280
2281         atomic_set(&oct->status, OCT_DEV_BEGIN_STATE);
2282
2283         /* Enable access to the octeon device and make its DMA capability
2284          * known to the OS.
2285          */
2286         if (octeon_pci_os_setup(oct))
2287                 return 1;
2288         atomic_set(&oct->status, OCT_DEV_PCI_ENABLE_DONE);
2289
2290         oct->chip_id = OCTEON_CN23XX_VF_VID;
2291         pci_read_config_dword(oct->pci_dev, 8, &rev_id);
2292         oct->rev_id = rev_id & 0xff;
2293
2294         if (cn23xx_setup_octeon_vf_device(oct))
2295                 return 1;
2296
2297         atomic_set(&oct->status, OCT_DEV_PCI_MAP_DONE);
2298
2299         oct->app_mode = CVM_DRV_NIC_APP;
2300
2301         /* Initialize the dispatch mechanism used to push packets arriving on
2302          * Octeon Output queues.
2303          */
2304         if (octeon_init_dispatch_list(oct))
2305                 return 1;
2306
2307         atomic_set(&oct->status, OCT_DEV_DISPATCH_INIT_DONE);
2308
2309         if (octeon_set_io_queues_off(oct)) {
2310                 dev_err(&oct->pci_dev->dev, "setting io queues off failed\n");
2311                 return 1;
2312         }
2313
2314         if (oct->fn_list.setup_device_regs(oct)) {
2315                 dev_err(&oct->pci_dev->dev, "device registers configuration failed\n");
2316                 return 1;
2317         }
2318
2319         /* Initialize soft command buffer pool */
2320         if (octeon_setup_sc_buffer_pool(oct)) {
2321                 dev_err(&oct->pci_dev->dev, "sc buffer pool allocation failed\n");
2322                 return 1;
2323         }
2324         atomic_set(&oct->status, OCT_DEV_SC_BUFF_POOL_INIT_DONE);
2325
2326         /* Setup the data structures that manage this Octeon's Input queues. */
2327         if (octeon_setup_instr_queues(oct)) {
2328                 dev_err(&oct->pci_dev->dev, "instruction queue initialization failed\n");
2329                 return 1;
2330         }
2331         atomic_set(&oct->status, OCT_DEV_INSTR_QUEUE_INIT_DONE);
2332
2333         /* Initialize lists to manage the requests of different types that
2334          * arrive from user & kernel applications for this octeon device.
2335          */
2336         if (octeon_setup_response_list(oct)) {
2337                 dev_err(&oct->pci_dev->dev, "Response list allocation failed\n");
2338                 return 1;
2339         }
2340         atomic_set(&oct->status, OCT_DEV_RESP_LIST_INIT_DONE);
2341
2342         if (octeon_setup_output_queues(oct)) {
2343                 dev_err(&oct->pci_dev->dev, "Output queue initialization failed\n");
2344                 return 1;
2345         }
2346         atomic_set(&oct->status, OCT_DEV_DROQ_INIT_DONE);
2347
2348         if (oct->fn_list.setup_mbox(oct)) {
2349                 dev_err(&oct->pci_dev->dev, "Mailbox setup failed\n");
2350                 return 1;
2351         }
2352         atomic_set(&oct->status, OCT_DEV_MBOX_SETUP_DONE);
2353
2354         if (octeon_allocate_ioq_vector(oct, oct->sriov_info.rings_per_vf)) {
2355                 dev_err(&oct->pci_dev->dev, "ioq vector allocation failed\n");
2356                 return 1;
2357         }
2358         atomic_set(&oct->status, OCT_DEV_MSIX_ALLOC_VECTOR_DONE);
2359
2360         dev_info(&oct->pci_dev->dev, "OCTEON_CN23XX VF: %d ioqs\n",
2361                  oct->sriov_info.rings_per_vf);
2362
2363         /* Setup the interrupt handler and record the INT SUM register address*/
2364         if (octeon_setup_interrupt(oct, oct->sriov_info.rings_per_vf))
2365                 return 1;
2366
2367         atomic_set(&oct->status, OCT_DEV_INTR_SET_DONE);
2368
2369         /* ***************************************************************
2370          * The interrupts need to be enabled for the PF<-->VF handshake.
2371          * They are [re]-enabled after the PF<-->VF handshake so that the
2372          * correct OQ tick value is used (i.e. the value retrieved from
2373          * the PF as part of the handshake).
2374          */
2375
2376         /* Enable Octeon device interrupts */
2377         oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2378
2379         if (cn23xx_octeon_pfvf_handshake(oct))
2380                 return 1;
2381
2382         /* Here we [re]-enable the interrupts so that the correct OQ tick value
2383          * is used (i.e. the value that was retrieved during the handshake)
2384          */
2385
2386         /* Enable Octeon device interrupts */
2387         oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2388         /* *************************************************************** */
2389
2390         /* Enable the input and output queues for this Octeon device */
2391         if (oct->fn_list.enable_io_queues(oct)) {
2392                 dev_err(&oct->pci_dev->dev, "enabling io queues failed\n");
2393                 return 1;
2394         }
2395
2396         atomic_set(&oct->status, OCT_DEV_IO_QUEUES_DONE);
2397
2398         atomic_set(&oct->status, OCT_DEV_HOST_OK);
2399
2400         /* Send Credit for Octeon Output queues. Credits are always sent after
2401          * the output queue is enabled.
2402          */
2403         for (j = 0; j < oct->num_oqs; j++)
2404                 writel(oct->droq[j]->max_count, oct->droq[j]->pkts_credit_reg);
2405
2406         /* Packets can start arriving on the output queues from this point. */
2407
2408         atomic_set(&oct->status, OCT_DEV_CORE_OK);
2409
2410         atomic_set(&oct->status, OCT_DEV_RUNNING);
2411
2412         if (liquidio_init_nic_module(oct))
2413                 return 1;
2414
2415         return 0;
2416 }
2417
2418 static int __init liquidio_vf_init(void)
2419 {
2420         octeon_init_device_list(0);
2421         return pci_register_driver(&liquidio_vf_pci_driver);
2422 }
2423
2424 static void __exit liquidio_vf_exit(void)
2425 {
2426         pci_unregister_driver(&liquidio_vf_pci_driver);
2427
2428         pr_info("LiquidIO_VF network module is now unloaded\n");
2429 }
2430
2431 module_init(liquidio_vf_init);
2432 module_exit(liquidio_vf_exit);