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

   1 /**********************************************************************
   2 * Author: Cavium, Inc.
   3 *
   4 * Contact: support@cavium.com
   5 *          Please include "LiquidIO" in the subject.
   6 *
   7 * Copyright (c) 2003-2015 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
  17 * details.
  18 *
  19 * This file may also be available under a different license from Cavium.
  20 * Contact Cavium, Inc. for more information
  21 **********************************************************************/
  22 #include <linux/version.h>
  23 #include <linux/pci.h>
  24 #include <linux/firmware.h>
  25 #include <linux/ptp_clock_kernel.h>
  26 #include <net/vxlan.h>
  27 #include "liquidio_common.h"
  28 #include "octeon_droq.h"
  29 #include "octeon_iq.h"
  30 #include "response_manager.h"
  31 #include "octeon_device.h"
  32 #include "octeon_nic.h"
  33 #include "octeon_main.h"
  34 #include "octeon_network.h"
  35 #include "cn66xx_regs.h"
  36 #include "cn66xx_device.h"
  37 #include "cn68xx_device.h"
  38 #include "liquidio_image.h"
  39
  40 MODULE_AUTHOR("Cavium Networks, <support@cavium.com>");
  41 MODULE_DESCRIPTION("Cavium LiquidIO Intelligent Server Adapter Driver");
  42 MODULE_LICENSE("GPL");
  43 MODULE_VERSION(LIQUIDIO_VERSION);
  44 MODULE_FIRMWARE(LIO_FW_DIR LIO_FW_BASE_NAME LIO_210SV_NAME LIO_FW_NAME_SUFFIX);
  45 MODULE_FIRMWARE(LIO_FW_DIR LIO_FW_BASE_NAME LIO_210NV_NAME LIO_FW_NAME_SUFFIX);
  46 MODULE_FIRMWARE(LIO_FW_DIR LIO_FW_BASE_NAME LIO_410NV_NAME LIO_FW_NAME_SUFFIX);
  47
  48 static int ddr_timeout = 10000;
  49 module_param(ddr_timeout, int, 0644);
  50 MODULE_PARM_DESC(ddr_timeout,
  51                  "Number of milliseconds to wait for DDR initialization. 0 waits for ddr_timeout to be set to non-zero value before starting to check");
  52
  53 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
  54
  55 #define INCR_INSTRQUEUE_PKT_COUNT(octeon_dev_ptr, iq_no, field, count)  \
  56         (octeon_dev_ptr->instr_queue[iq_no]->stats.field += count)
  57
  58 static int debug = -1;
  59 module_param(debug, int, 0644);
  60 MODULE_PARM_DESC(debug, "NETIF_MSG debug bits");
  61
  62 static char fw_type[LIO_MAX_FW_TYPE_LEN];
  63 module_param_string(fw_type, fw_type, sizeof(fw_type), 0000);
  64 MODULE_PARM_DESC(fw_type, "Type of firmware to be loaded. Default \"nic\"");
  65
  66 static int conf_type;
  67 module_param(conf_type, int, 0);
  68 MODULE_PARM_DESC(conf_type, "select octeon configuration 0 default 1 ovs");
  69
  70 static int ptp_enable = 1;
  71
  72 /* Bit mask values for lio->ifstate */
  73 #define   LIO_IFSTATE_DROQ_OPS             0x01
  74 #define   LIO_IFSTATE_REGISTERED           0x02
  75 #define   LIO_IFSTATE_RUNNING              0x04
  76 #define   LIO_IFSTATE_RX_TIMESTAMP_ENABLED 0x08
  77
  78 /* Polling interval for determining when NIC application is alive */
  79 #define LIQUIDIO_STARTER_POLL_INTERVAL_MS 100
  80
  81 /* runtime link query interval */
  82 #define LIQUIDIO_LINK_QUERY_INTERVAL_MS         1000
  83
  84 struct liquidio_if_cfg_context {
  85         int octeon_id;
  86
  87         wait_queue_head_t wc;
  88
  89         int cond;
  90 };
  91
  92 struct liquidio_if_cfg_resp {
  93         u64 rh;
  94         struct liquidio_if_cfg_info cfg_info;
  95         u64 status;
  96 };
  97
  98 struct oct_link_status_resp {
  99         u64 rh;
 100         struct oct_link_info link_info;
 101         u64 status;
 102 };
 103
 104 struct oct_timestamp_resp {
 105         u64 rh;
 106         u64 timestamp;
 107         u64 status;
 108 };
 109
 110 #define OCT_TIMESTAMP_RESP_SIZE (sizeof(struct oct_timestamp_resp))
 111
 112 union tx_info {
 113         u64 u64;
 114         struct {
 115 #ifdef __BIG_ENDIAN_BITFIELD
 116                 u16 gso_size;
 117                 u16 gso_segs;
 118                 u32 reserved;
 119 #else
 120                 u32 reserved;
 121                 u16 gso_segs;
 122                 u16 gso_size;
 123 #endif
 124         } s;
 125 };
 126
 127 /** Octeon device properties to be used by the NIC module.
 128  * Each octeon device in the system will be represented
 129  * by this structure in the NIC module.
 130  */
 131
 132 #define OCTNIC_MAX_SG  (MAX_SKB_FRAGS)
 133
 134 #define OCTNIC_GSO_MAX_HEADER_SIZE 128
 135 #define OCTNIC_GSO_MAX_SIZE (GSO_MAX_SIZE - OCTNIC_GSO_MAX_HEADER_SIZE)
 136
 137 /** Structure of a node in list of gather components maintained by
 138  * NIC driver for each network device.
 139  */
 140 struct octnic_gather {
 141         /** List manipulation. Next and prev pointers. */
 142         struct list_head list;
 143
 144         /** Size of the gather component at sg in bytes. */
 145         int sg_size;
 146
 147         /** Number of bytes that sg was adjusted to make it 8B-aligned. */
 148         int adjust;
 149
 150         /** Gather component that can accommodate max sized fragment list
 151          *  received from the IP layer.
 152          */
 153         struct octeon_sg_entry *sg;
 154
 155         u64 sg_dma_ptr;
 156 };
 157
 158 struct handshake {
 159         struct completion init;
 160         struct completion started;
 161         struct pci_dev *pci_dev;
 162         int init_ok;
 163         int started_ok;
 164 };
 165
 166 struct octeon_device_priv {
 167         /** Tasklet structures for this device. */
 168         struct tasklet_struct droq_tasklet;
 169         unsigned long napi_mask;
 170 };
 171
 172 static int octeon_device_init(struct octeon_device *);
 173 static int liquidio_stop(struct net_device *netdev);
 174 static void liquidio_remove(struct pci_dev *pdev);
 175 static int liquidio_probe(struct pci_dev *pdev,
 176                           const struct pci_device_id *ent);
 177
 178 static struct handshake handshake[MAX_OCTEON_DEVICES];
 179 static struct completion first_stage;
 180
 181 static void octeon_droq_bh(unsigned long pdev)
 182 {
 183         int q_no;
 184         int reschedule = 0;
 185         struct octeon_device *oct = (struct octeon_device *)pdev;
 186         struct octeon_device_priv *oct_priv =
 187                 (struct octeon_device_priv *)oct->priv;
 188
 189         /* for (q_no = 0; q_no < oct->num_oqs; q_no++) { */
 190         for (q_no = 0; q_no < MAX_OCTEON_OUTPUT_QUEUES(oct); q_no++) {
 191                 if (!(oct->io_qmask.oq & (1ULL << q_no)))
 192                         continue;
 193                 reschedule |= octeon_droq_process_packets(oct, oct->droq[q_no],
 194                                                           MAX_PACKET_BUDGET);
 195                 lio_enable_irq(oct->droq[q_no], NULL);
 196         }
 197
 198         if (reschedule)
 199                 tasklet_schedule(&oct_priv->droq_tasklet);
 200 }
 201
 202 static int lio_wait_for_oq_pkts(struct octeon_device *oct)
 203 {
 204         struct octeon_device_priv *oct_priv =
 205                 (struct octeon_device_priv *)oct->priv;
 206         int retry = 100, pkt_cnt = 0, pending_pkts = 0;
 207         int i;
 208
 209         do {
 210                 pending_pkts = 0;
 211
 212                 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
 213                         if (!(oct->io_qmask.oq & (1ULL << i)))
 214                                 continue;
 215                         pkt_cnt += octeon_droq_check_hw_for_pkts(oct->droq[i]);
 216                 }
 217                 if (pkt_cnt > 0) {
 218                         pending_pkts += pkt_cnt;
 219                         tasklet_schedule(&oct_priv->droq_tasklet);
 220                 }
 221                 pkt_cnt = 0;
 222                 schedule_timeout_uninterruptible(1);
 223
 224         } while (retry-- && pending_pkts);
 225
 226         return pkt_cnt;
 227 }
 228
 229 /**
 230  * \brief Forces all IO queues off on a given device
 231  * @param oct Pointer to Octeon device
 232  */
 233 static void force_io_queues_off(struct octeon_device *oct)
 234 {
 235         if ((oct->chip_id == OCTEON_CN66XX) ||
 236             (oct->chip_id == OCTEON_CN68XX)) {
 237                 /* Reset the Enable bits for Input Queues. */
 238                 octeon_write_csr(oct, CN6XXX_SLI_PKT_INSTR_ENB, 0);
 239
 240                 /* Reset the Enable bits for Output Queues. */
 241                 octeon_write_csr(oct, CN6XXX_SLI_PKT_OUT_ENB, 0);
 242         }
 243 }
 244
 245 /**
 246  * \brief wait for all pending requests to complete
 247  * @param oct Pointer to Octeon device
 248  *
 249  * Called during shutdown sequence
 250  */
 251 static int wait_for_pending_requests(struct octeon_device *oct)
 252 {
 253         int i, pcount = 0;
 254
 255         for (i = 0; i < 100; i++) {
 256                 pcount =
 257                         atomic_read(&oct->response_list
 258                                 [OCTEON_ORDERED_SC_LIST].pending_req_count);
 259                 if (pcount)
 260                         schedule_timeout_uninterruptible(HZ / 10);
 261                 else
 262                         break;
 263         }
 264
 265         if (pcount)
 266                 return 1;
 267
 268         return 0;
 269 }
 270
 271 /**
 272  * \brief Cause device to go quiet so it can be safely removed/reset/etc
 273  * @param oct Pointer to Octeon device
 274  */
 275 static inline void pcierror_quiesce_device(struct octeon_device *oct)
 276 {
 277         int i;
 278
 279         /* Disable the input and output queues now. No more packets will
 280          * arrive from Octeon, but we should wait for all packet processing
 281          * to finish.
 282          */
 283         force_io_queues_off(oct);
 284
 285         /* To allow for in-flight requests */
 286         schedule_timeout_uninterruptible(100);
 287
 288         if (wait_for_pending_requests(oct))
 289                 dev_err(&oct->pci_dev->dev, "There were pending requests\n");
 290
 291         /* Force all requests waiting to be fetched by OCTEON to complete. */
 292         for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
 293                 struct octeon_instr_queue *iq;
 294
 295                 if (!(oct->io_qmask.iq & (1ULL << i)))
 296                         continue;
 297                 iq = oct->instr_queue[i];
 298
 299                 if (atomic_read(&iq->instr_pending)) {
 300                         spin_lock_bh(&iq->lock);
 301                         iq->fill_cnt = 0;
 302                         iq->octeon_read_index = iq->host_write_index;
 303                         iq->stats.instr_processed +=
 304                                 atomic_read(&iq->instr_pending);
 305                         lio_process_iq_request_list(oct, iq, 0);
 306                         spin_unlock_bh(&iq->lock);
 307                 }
 308         }
 309
 310         /* Force all pending ordered list requests to time out. */
 311         lio_process_ordered_list(oct, 1);
 312
 313         /* We do not need to wait for output queue packets to be processed. */
 314 }
 315
 316 /**
 317  * \brief Cleanup PCI AER uncorrectable error status
 318  * @param dev Pointer to PCI device
 319  */
 320 static void cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
 321 {
 322         int pos = 0x100;
 323         u32 status, mask;
 324
 325         pr_info("%s :\n", __func__);
 326
 327         pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
 328         pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
 329         if (dev->error_state == pci_channel_io_normal)
 330                 status &= ~mask;        /* Clear corresponding nonfatal bits */
 331         else
 332                 status &= mask;         /* Clear corresponding fatal bits */
 333         pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
 334 }
 335
 336 /**
 337  * \brief Stop all PCI IO to a given device
 338  * @param dev Pointer to Octeon device
 339  */
 340 static void stop_pci_io(struct octeon_device *oct)
 341 {
 342         /* No more instructions will be forwarded. */
 343         atomic_set(&oct->status, OCT_DEV_IN_RESET);
 344
 345         pci_disable_device(oct->pci_dev);
 346
 347         /* Disable interrupts  */
 348         oct->fn_list.disable_interrupt(oct->chip);
 349
 350         pcierror_quiesce_device(oct);
 351
 352         /* Release the interrupt line */
 353         free_irq(oct->pci_dev->irq, oct);
 354
 355         if (oct->flags & LIO_FLAG_MSI_ENABLED)
 356                 pci_disable_msi(oct->pci_dev);
 357
 358         dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
 359                 lio_get_state_string(&oct->status));
 360
 361         /* cn63xx_cleanup_aer_uncorrect_error_status(oct->pci_dev); */
 362         /* making it a common function for all OCTEON models */
 363         cleanup_aer_uncorrect_error_status(oct->pci_dev);
 364 }
 365
 366 /**
 367  * \brief called when PCI error is detected
 368  * @param pdev Pointer to PCI device
 369  * @param state The current pci connection state
 370  *
 371  * This function is called after a PCI bus error affecting
 372  * this device has been detected.
 373  */
 374 static pci_ers_result_t liquidio_pcie_error_detected(struct pci_dev *pdev,
 375                                                      pci_channel_state_t state)
 376 {
 377         struct octeon_device *oct = pci_get_drvdata(pdev);
 378
 379         /* Non-correctable Non-fatal errors */
 380         if (state == pci_channel_io_normal) {
 381                 dev_err(&oct->pci_dev->dev, "Non-correctable non-fatal error reported:\n");
 382                 cleanup_aer_uncorrect_error_status(oct->pci_dev);
 383                 return PCI_ERS_RESULT_CAN_RECOVER;
 384         }
 385
 386         /* Non-correctable Fatal errors */
 387         dev_err(&oct->pci_dev->dev, "Non-correctable FATAL reported by PCI AER driver\n");
 388         stop_pci_io(oct);
 389
 390         /* Always return a DISCONNECT. There is no support for recovery but only
 391          * for a clean shutdown.
 392          */
 393         return PCI_ERS_RESULT_DISCONNECT;
 394 }
 395
 396 /**
 397  * \brief mmio handler
 398  * @param pdev Pointer to PCI device
 399  */
 400 static pci_ers_result_t liquidio_pcie_mmio_enabled(
 401                                 struct pci_dev *pdev __attribute__((unused)))
 402 {
 403         /* We should never hit this since we never ask for a reset for a Fatal
 404          * Error. We always return DISCONNECT in io_error above.
 405          * But play safe and return RECOVERED for now.
 406          */
 407         return PCI_ERS_RESULT_RECOVERED;
 408 }
 409
 410 /**
 411  * \brief called after the pci bus has been reset.
 412  * @param pdev Pointer to PCI device
 413  *
 414  * Restart the card from scratch, as if from a cold-boot. Implementation
 415  * resembles the first-half of the octeon_resume routine.
 416  */
 417 static pci_ers_result_t liquidio_pcie_slot_reset(
 418                                 struct pci_dev *pdev __attribute__((unused)))
 419 {
 420         /* We should never hit this since we never ask for a reset for a Fatal
 421          * Error. We always return DISCONNECT in io_error above.
 422          * But play safe and return RECOVERED for now.
 423          */
 424         return PCI_ERS_RESULT_RECOVERED;
 425 }
 426
 427 /**
 428  * \brief called when traffic can start flowing again.
 429  * @param pdev Pointer to PCI device
 430  *
 431  * This callback is called when the error recovery driver tells us that
 432  * its OK to resume normal operation. Implementation resembles the
 433  * second-half of the octeon_resume routine.
 434  */
 435 static void liquidio_pcie_resume(struct pci_dev *pdev __attribute__((unused)))
 436 {
 437         /* Nothing to be done here. */
 438 }
 439
 440 #ifdef CONFIG_PM
 441 /**
 442  * \brief called when suspending
 443  * @param pdev Pointer to PCI device
 444  * @param state state to suspend to
 445  */
 446 static int liquidio_suspend(struct pci_dev *pdev __attribute__((unused)),
 447                             pm_message_t state __attribute__((unused)))
 448 {
 449         return 0;
 450 }
 451
 452 /**
 453  * \brief called when resuming
 454  * @param pdev Pointer to PCI device
 455  */
 456 static int liquidio_resume(struct pci_dev *pdev __attribute__((unused)))
 457 {
 458         return 0;
 459 }
 460 #endif
 461
 462 /* For PCI-E Advanced Error Recovery (AER) Interface */
 463 static const struct pci_error_handlers liquidio_err_handler = {
 464         .error_detected = liquidio_pcie_error_detected,
 465         .mmio_enabled   = liquidio_pcie_mmio_enabled,
 466         .slot_reset     = liquidio_pcie_slot_reset,
 467         .resume         = liquidio_pcie_resume,
 468 };
 469
 470 static const struct pci_device_id liquidio_pci_tbl[] = {
 471         {       /* 68xx */
 472                 PCI_VENDOR_ID_CAVIUM, 0x91, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
 473         },
 474         {       /* 66xx */
 475                 PCI_VENDOR_ID_CAVIUM, 0x92, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
 476         },
 477         {       /* 23xx pf */
 478                 PCI_VENDOR_ID_CAVIUM, 0x9702, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
 479         },
 480         {
 481                 0, 0, 0, 0, 0, 0, 0
 482         }
 483 };
 484 MODULE_DEVICE_TABLE(pci, liquidio_pci_tbl);
 485
 486 static struct pci_driver liquidio_pci_driver = {
 487         .name           = "LiquidIO",
 488         .id_table       = liquidio_pci_tbl,
 489         .probe          = liquidio_probe,
 490         .remove         = liquidio_remove,
 491         .err_handler    = &liquidio_err_handler,    /* For AER */
 492
 493 #ifdef CONFIG_PM
 494         .suspend        = liquidio_suspend,
 495         .resume         = liquidio_resume,
 496 #endif
 497 };
 498
 499 /**
 500  * \brief register PCI driver
 501  */
 502 static int liquidio_init_pci(void)
 503 {
 504         return pci_register_driver(&liquidio_pci_driver);
 505 }
 506
 507 /**
 508  * \brief unregister PCI driver
 509  */
 510 static void liquidio_deinit_pci(void)
 511 {
 512         pci_unregister_driver(&liquidio_pci_driver);
 513 }
 514
 515 /**
 516  * \brief check interface state
 517  * @param lio per-network private data
 518  * @param state_flag flag state to check
 519  */
 520 static inline int ifstate_check(struct lio *lio, int state_flag)
 521 {
 522         return atomic_read(&lio->ifstate) & state_flag;
 523 }
 524
 525 /**
 526  * \brief set interface state
 527  * @param lio per-network private data
 528  * @param state_flag flag state to set
 529  */
 530 static inline void ifstate_set(struct lio *lio, int state_flag)
 531 {
 532         atomic_set(&lio->ifstate, (atomic_read(&lio->ifstate) | state_flag));
 533 }
 534
 535 /**
 536  * \brief clear interface state
 537  * @param lio per-network private data
 538  * @param state_flag flag state to clear
 539  */
 540 static inline void ifstate_reset(struct lio *lio, int state_flag)
 541 {
 542         atomic_set(&lio->ifstate, (atomic_read(&lio->ifstate) & ~(state_flag)));
 543 }
 544
 545 /**
 546  * \brief Stop Tx queues
 547  * @param netdev network device
 548  */
 549 static inline void txqs_stop(struct net_device *netdev)
 550 {
 551         if (netif_is_multiqueue(netdev)) {
 552                 int i;
 553
 554                 for (i = 0; i < netdev->num_tx_queues; i++)
 555                         netif_stop_subqueue(netdev, i);
 556         } else {
 557                 netif_stop_queue(netdev);
 558         }
 559 }
 560
 561 /**
 562  * \brief Start Tx queues
 563  * @param netdev network device
 564  */
 565 static inline void txqs_start(struct net_device *netdev)
 566 {
 567         if (netif_is_multiqueue(netdev)) {
 568                 int i;
 569
 570                 for (i = 0; i < netdev->num_tx_queues; i++)
 571                         netif_start_subqueue(netdev, i);
 572         } else {
 573                 netif_start_queue(netdev);
 574         }
 575 }
 576
 577 /**
 578  * \brief Wake Tx queues
 579  * @param netdev network device
 580  */
 581 static inline void txqs_wake(struct net_device *netdev)
 582 {
 583         struct lio *lio = GET_LIO(netdev);
 584
 585         if (netif_is_multiqueue(netdev)) {
 586                 int i;
 587
 588                 for (i = 0; i < netdev->num_tx_queues; i++) {
 589                         int qno = lio->linfo.txpciq[i %
 590                                 (lio->linfo.num_txpciq)].s.q_no;
 591
 592                         if (__netif_subqueue_stopped(netdev, i)) {
 593                                 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, qno,
 594                                                           tx_restart, 1);
 595                                 netif_wake_subqueue(netdev, i);
 596                         }
 597                 }
 598         } else {
 599                 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, lio->txq,
 600                                           tx_restart, 1);
 601                 netif_wake_queue(netdev);
 602         }
 603 }
 604
 605 /**
 606  * \brief Stop Tx queue
 607  * @param netdev network device
 608  */
 609 static void stop_txq(struct net_device *netdev)
 610 {
 611         txqs_stop(netdev);
 612 }
 613
 614 /**
 615  * \brief Start Tx queue
 616  * @param netdev network device
 617  */
 618 static void start_txq(struct net_device *netdev)
 619 {
 620         struct lio *lio = GET_LIO(netdev);
 621
 622         if (lio->linfo.link.s.link_up) {
 623                 txqs_start(netdev);
 624                 return;
 625         }
 626 }
 627
 628 /**
 629  * \brief Wake a queue
 630  * @param netdev network device
 631  * @param q which queue to wake
 632  */
 633 static inline void wake_q(struct net_device *netdev, int q)
 634 {
 635         if (netif_is_multiqueue(netdev))
 636                 netif_wake_subqueue(netdev, q);
 637         else
 638                 netif_wake_queue(netdev);
 639 }
 640
 641 /**
 642  * \brief Stop a queue
 643  * @param netdev network device
 644  * @param q which queue to stop
 645  */
 646 static inline void stop_q(struct net_device *netdev, int q)
 647 {
 648         if (netif_is_multiqueue(netdev))
 649                 netif_stop_subqueue(netdev, q);
 650         else
 651                 netif_stop_queue(netdev);
 652 }
 653
 654 /**
 655  * \brief Check Tx queue status, and take appropriate action
 656  * @param lio per-network private data
 657  * @returns 0 if full, number of queues woken up otherwise
 658  */
 659 static inline int check_txq_status(struct lio *lio)
 660 {
 661         int ret_val = 0;
 662
 663         if (netif_is_multiqueue(lio->netdev)) {
 664                 int numqs = lio->netdev->num_tx_queues;
 665                 int q, iq = 0;
 666
 667                 /* check each sub-queue state */
 668                 for (q = 0; q < numqs; q++) {
 669                         iq = lio->linfo.txpciq[q %
 670                                 (lio->linfo.num_txpciq)].s.q_no;
 671                         if (octnet_iq_is_full(lio->oct_dev, iq))
 672                                 continue;
 673                         if (__netif_subqueue_stopped(lio->netdev, q)) {
 674                                 wake_q(lio->netdev, q);
 675                                 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, iq,
 676                                                           tx_restart, 1);
 677                                 ret_val++;
 678                         }
 679                 }
 680         } else {
 681                 if (octnet_iq_is_full(lio->oct_dev, lio->txq))
 682                         return 0;
 683                 wake_q(lio->netdev, lio->txq);
 684                 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, lio->txq,
 685                                           tx_restart, 1);
 686                 ret_val = 1;
 687         }
 688         return ret_val;
 689 }
 690
 691 /**
 692  * Remove the node at the head of the list. The list would be empty at
 693  * the end of this call if there are no more nodes in the list.
 694  */
 695 static inline struct list_head *list_delete_head(struct list_head *root)
 696 {
 697         struct list_head *node;
 698
 699         if ((root->prev == root) && (root->next == root))
 700                 node = NULL;
 701         else
 702                 node = root->next;
 703
 704         if (node)
 705                 list_del(node);
 706
 707         return node;
 708 }
 709
 710 /**
 711  * \brief Delete gather lists
 712  * @param lio per-network private data
 713  */
 714 static void delete_glists(struct lio *lio)
 715 {
 716         struct octnic_gather *g;
 717         int i;
 718
 719         if (!lio->glist)
 720                 return;
 721
 722         for (i = 0; i < lio->linfo.num_txpciq; i++) {
 723                 do {
 724                         g = (struct octnic_gather *)
 725                                 list_delete_head(&lio->glist[i]);
 726                         if (g) {
 727                                 if (g->sg) {
 728                                         dma_unmap_single(&lio->oct_dev->
 729                                                          pci_dev->dev,
 730                                                          g->sg_dma_ptr,
 731                                                          g->sg_size,
 732                                                          DMA_TO_DEVICE);
 733                                         kfree((void *)((unsigned long)g->sg -
 734                                                        g->adjust));
 735                                 }
 736                                 kfree(g);
 737                         }
 738                 } while (g);
 739         }
 740
 741         kfree((void *)lio->glist);
 742 }
 743
 744 /**
 745  * \brief Setup gather lists
 746  * @param lio per-network private data
 747  */
 748 static int setup_glists(struct octeon_device *oct, struct lio *lio, int num_iqs)
 749 {
 750         int i, j;
 751         struct octnic_gather *g;
 752
 753         lio->glist_lock = kcalloc(num_iqs, sizeof(*lio->glist_lock),
 754                                   GFP_KERNEL);
 755         if (!lio->glist_lock)
 756                 return 1;
 757
 758         lio->glist = kcalloc(num_iqs, sizeof(*lio->glist),
 759                              GFP_KERNEL);
 760         if (!lio->glist) {
 761                 kfree((void *)lio->glist_lock);
 762                 return 1;
 763         }
 764
 765         for (i = 0; i < num_iqs; i++) {
 766                 int numa_node = cpu_to_node(i % num_online_cpus());
 767
 768                 spin_lock_init(&lio->glist_lock[i]);
 769
 770                 INIT_LIST_HEAD(&lio->glist[i]);
 771
 772                 for (j = 0; j < lio->tx_qsize; j++) {
 773                         g = kzalloc_node(sizeof(*g), GFP_KERNEL,
 774                                          numa_node);
 775                         if (!g)
 776                                 g = kzalloc(sizeof(*g), GFP_KERNEL);
 777                         if (!g)
 778                                 break;
 779
 780                         g->sg_size = ((ROUNDUP4(OCTNIC_MAX_SG) >> 2) *
 781                                       OCT_SG_ENTRY_SIZE);
 782
 783                         g->sg = kmalloc_node(g->sg_size + 8,
 784                                              GFP_KERNEL, numa_node);
 785                         if (!g->sg)
 786                                 g->sg = kmalloc(g->sg_size + 8, GFP_KERNEL);
 787                         if (!g->sg) {
 788                                 kfree(g);
 789                                 break;
 790                         }
 791
 792                         /* The gather component should be aligned on 64-bit
 793                          * boundary
 794                          */
 795                         if (((unsigned long)g->sg) & 7) {
 796                                 g->adjust = 8 - (((unsigned long)g->sg) & 7);
 797                                 g->sg = (struct octeon_sg_entry *)
 798                                         ((unsigned long)g->sg + g->adjust);
 799                         }
 800                         g->sg_dma_ptr = dma_map_single(&oct->pci_dev->dev,
 801                                                        g->sg, g->sg_size,
 802                                                        DMA_TO_DEVICE);
 803                         if (dma_mapping_error(&oct->pci_dev->dev,
 804                                               g->sg_dma_ptr)) {
 805                                 kfree((void *)((unsigned long)g->sg -
 806                                                g->adjust));
 807                                 kfree(g);
 808                                 break;
 809                         }
 810
 811                         list_add_tail(&g->list, &lio->glist[i]);
 812                 }
 813
 814                 if (j != lio->tx_qsize) {
 815                         delete_glists(lio);
 816                         return 1;
 817                 }
 818         }
 819
 820         return 0;
 821 }
 822
 823 /**
 824  * \brief Print link information
 825  * @param netdev network device
 826  */
 827 static void print_link_info(struct net_device *netdev)
 828 {
 829         struct lio *lio = GET_LIO(netdev);
 830
 831         if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED) {
 832                 struct oct_link_info *linfo = &lio->linfo;
 833
 834                 if (linfo->link.s.link_up) {
 835                         netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
 836                                    linfo->link.s.speed,
 837                                    (linfo->link.s.duplex) ? "Full" : "Half");
 838                 } else {
 839                         netif_info(lio, link, lio->netdev, "Link Down\n");
 840                 }
 841         }
 842 }
 843
 844 /**
 845  * \brief Update link status
 846  * @param netdev network device
 847  * @param ls link status structure
 848  *
 849  * Called on receipt of a link status response from the core application to
 850  * update each interface's link status.
 851  */
 852 static inline void update_link_status(struct net_device *netdev,
 853                                       union oct_link_status *ls)
 854 {
 855         struct lio *lio = GET_LIO(netdev);
 856         int changed = (lio->linfo.link.u64 != ls->u64);
 857
 858         lio->linfo.link.u64 = ls->u64;
 859
 860         if ((lio->intf_open) && (changed)) {
 861                 print_link_info(netdev);
 862                 lio->link_changes++;
 863
 864                 if (lio->linfo.link.s.link_up) {
 865                         netif_carrier_on(netdev);
 866                         /* start_txq(netdev); */
 867                         txqs_wake(netdev);
 868                 } else {
 869                         netif_carrier_off(netdev);
 870                         stop_txq(netdev);
 871                 }
 872         }
 873 }
 874
 875 /* Runs in interrupt context. */
 876 static void update_txq_status(struct octeon_device *oct, int iq_num)
 877 {
 878         struct net_device *netdev;
 879         struct lio *lio;
 880         struct octeon_instr_queue *iq = oct->instr_queue[iq_num];
 881
 882         /*octeon_update_iq_read_idx(oct, iq);*/
 883
 884         netdev = oct->props[iq->ifidx].netdev;
 885
 886         /* This is needed because the first IQ does not have
 887          * a netdev associated with it.
 888          */
 889         if (!netdev)
 890                 return;
 891
 892         lio = GET_LIO(netdev);
 893         if (netif_is_multiqueue(netdev)) {
 894                 if (__netif_subqueue_stopped(netdev, iq->q_index) &&
 895                     lio->linfo.link.s.link_up &&
 896                     (!octnet_iq_is_full(oct, iq_num))) {
 897                         INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, iq_num,
 898                                                   tx_restart, 1);
 899                         netif_wake_subqueue(netdev, iq->q_index);
 900                 } else {
 901                         if (!octnet_iq_is_full(oct, lio->txq)) {
 902                                 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev,
 903                                                           lio->txq,
 904                                                           tx_restart, 1);
 905                                 wake_q(netdev, lio->txq);
 906                         }
 907                 }
 908         }
 909 }
 910
 911 /**
 912  * \brief Droq packet processor sceduler
 913  * @param oct octeon device
 914  */
 915 static
 916 void liquidio_schedule_droq_pkt_handlers(struct octeon_device *oct)
 917 {
 918         struct octeon_device_priv *oct_priv =
 919                 (struct octeon_device_priv *)oct->priv;
 920         u64 oq_no;
 921         struct octeon_droq *droq;
 922
 923         if (oct->int_status & OCT_DEV_INTR_PKT_DATA) {
 924                 for (oq_no = 0; oq_no < MAX_OCTEON_OUTPUT_QUEUES(oct);
 925                      oq_no++) {
 926                         if (!(oct->droq_intr & (1ULL << oq_no)))
 927                                 continue;
 928
 929                         droq = oct->droq[oq_no];
 930
 931                         if (droq->ops.poll_mode) {
 932                                 droq->ops.napi_fn(droq);
 933                                 oct_priv->napi_mask |= (1 << oq_no);
 934                         } else {
 935                                 tasklet_schedule(&oct_priv->droq_tasklet);
 936                         }
 937                 }
 938         }
 939 }
 940
 941 /**
 942  * \brief Interrupt handler for octeon
 943  * @param irq unused
 944  * @param dev octeon device
 945  */
 946 static
 947 irqreturn_t liquidio_intr_handler(int irq __attribute__((unused)), void *dev)
 948 {
 949         struct octeon_device *oct = (struct octeon_device *)dev;
 950         irqreturn_t ret;
 951
 952         /* Disable our interrupts for the duration of ISR */
 953         oct->fn_list.disable_interrupt(oct->chip);
 954
 955         ret = oct->fn_list.process_interrupt_regs(oct);
 956
 957         if (ret == IRQ_HANDLED)
 958                 liquidio_schedule_droq_pkt_handlers(oct);
 959
 960         /* Re-enable our interrupts  */
 961         if (!(atomic_read(&oct->status) == OCT_DEV_IN_RESET))
 962                 oct->fn_list.enable_interrupt(oct->chip);
 963
 964         return ret;
 965 }
 966
 967 /**
 968  * \brief Setup interrupt for octeon device
 969  * @param oct octeon device
 970  *
 971  *  Enable interrupt in Octeon device as given in the PCI interrupt mask.
 972  */
 973 static int octeon_setup_interrupt(struct octeon_device *oct)
 974 {
 975         int irqret, err;
 976
 977         err = pci_enable_msi(oct->pci_dev);
 978         if (err)
 979                 dev_warn(&oct->pci_dev->dev, "Reverting to legacy interrupts. Error: %d\n",
 980                          err);
 981         else
 982                 oct->flags |= LIO_FLAG_MSI_ENABLED;
 983
 984         irqret = request_irq(oct->pci_dev->irq, liquidio_intr_handler,
 985                              IRQF_SHARED, "octeon", oct);
 986         if (irqret) {
 987                 if (oct->flags & LIO_FLAG_MSI_ENABLED)
 988                         pci_disable_msi(oct->pci_dev);
 989                 dev_err(&oct->pci_dev->dev, "Request IRQ failed with code: %d\n",
 990                         irqret);
 991                 return 1;
 992         }
 993
 994         return 0;
 995 }
 996
 997 /**
 998  * \brief PCI probe handler
 999  * @param pdev PCI device structure
1000  * @param ent unused
1001  */
1002 static int
1003 liquidio_probe(struct pci_dev *pdev,
1004                const struct pci_device_id *ent __attribute__((unused)))
1005 {
1006         struct octeon_device *oct_dev = NULL;
1007         struct handshake *hs;
1008
1009         oct_dev = octeon_allocate_device(pdev->device,
1010                                          sizeof(struct octeon_device_priv));
1011         if (!oct_dev) {
1012                 dev_err(&pdev->dev, "Unable to allocate device\n");
1013                 return -ENOMEM;
1014         }
1015
1016         dev_info(&pdev->dev, "Initializing device %x:%x.\n",
1017                  (u32)pdev->vendor, (u32)pdev->device);
1018
1019         /* Assign octeon_device for this device to the private data area. */
1020         pci_set_drvdata(pdev, oct_dev);
1021
1022         /* set linux specific device pointer */
1023         oct_dev->pci_dev = (void *)pdev;
1024
1025         hs = &handshake[oct_dev->octeon_id];
1026         init_completion(&hs->init);
1027         init_completion(&hs->started);
1028         hs->pci_dev = pdev;
1029
1030         if (oct_dev->octeon_id == 0)
1031                 /* first LiquidIO NIC is detected */
1032                 complete(&first_stage);
1033
1034         if (octeon_device_init(oct_dev)) {
1035                 liquidio_remove(pdev);
1036                 return -ENOMEM;
1037         }
1038
1039         oct_dev->rx_pause = 1;
1040         oct_dev->tx_pause = 1;
1041
1042         dev_dbg(&oct_dev->pci_dev->dev, "Device is ready\n");
1043
1044         return 0;
1045 }
1046
1047 /**
1048  *\brief Destroy resources associated with octeon device
1049  * @param pdev PCI device structure
1050  * @param ent unused
1051  */
1052 static void octeon_destroy_resources(struct octeon_device *oct)
1053 {
1054         int i;
1055         struct octeon_device_priv *oct_priv =
1056                 (struct octeon_device_priv *)oct->priv;
1057
1058         struct handshake *hs;
1059
1060         switch (atomic_read(&oct->status)) {
1061         case OCT_DEV_RUNNING:
1062         case OCT_DEV_CORE_OK:
1063
1064                 /* No more instructions will be forwarded. */
1065                 atomic_set(&oct->status, OCT_DEV_IN_RESET);
1066
1067                 oct->app_mode = CVM_DRV_INVALID_APP;
1068                 dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
1069                         lio_get_state_string(&oct->status));
1070
1071                 schedule_timeout_uninterruptible(HZ / 10);
1072
1073                 /* fallthrough */
1074         case OCT_DEV_HOST_OK:
1075
1076                 /* fallthrough */
1077         case OCT_DEV_CONSOLE_INIT_DONE:
1078                 /* Remove any consoles */
1079                 octeon_remove_consoles(oct);
1080
1081                 /* fallthrough */
1082         case OCT_DEV_IO_QUEUES_DONE:
1083                 if (wait_for_pending_requests(oct))
1084                         dev_err(&oct->pci_dev->dev, "There were pending requests\n");
1085
1086                 if (lio_wait_for_instr_fetch(oct))
1087                         dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");
1088
1089                 /* Disable the input and output queues now. No more packets will
1090                  * arrive from Octeon, but we should wait for all packet
1091                  * processing to finish.
1092                  */
1093                 oct->fn_list.disable_io_queues(oct);
1094
1095                 if (lio_wait_for_oq_pkts(oct))
1096                         dev_err(&oct->pci_dev->dev, "OQ had pending packets\n");
1097
1098                 /* Disable interrupts  */
1099                 oct->fn_list.disable_interrupt(oct->chip);
1100
1101                 /* Release the interrupt line */
1102                 free_irq(oct->pci_dev->irq, oct);
1103
1104                 if (oct->flags & LIO_FLAG_MSI_ENABLED)
1105                         pci_disable_msi(oct->pci_dev);
1106
1107                 /* fallthrough */
1108         case OCT_DEV_IN_RESET:
1109         case OCT_DEV_DROQ_INIT_DONE:
1110                 /*atomic_set(&oct->status, OCT_DEV_DROQ_INIT_DONE);*/
1111                 mdelay(100);
1112                 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
1113                         if (!(oct->io_qmask.oq & (1ULL << i)))
1114                                 continue;
1115                         octeon_delete_droq(oct, i);
1116                 }
1117
1118                 /* Force any pending handshakes to complete */
1119                 for (i = 0; i < MAX_OCTEON_DEVICES; i++) {
1120                         hs = &handshake[i];
1121
1122                         if (hs->pci_dev) {
1123                                 handshake[oct->octeon_id].init_ok = 0;
1124                                 complete(&handshake[oct->octeon_id].init);
1125                                 handshake[oct->octeon_id].started_ok = 0;
1126                                 complete(&handshake[oct->octeon_id].started);
1127                         }
1128                 }
1129
1130                 /* fallthrough */
1131         case OCT_DEV_RESP_LIST_INIT_DONE:
1132                 octeon_delete_response_list(oct);
1133
1134                 /* fallthrough */
1135         case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
1136                 octeon_free_sc_buffer_pool(oct);
1137
1138                 /* fallthrough */
1139         case OCT_DEV_INSTR_QUEUE_INIT_DONE:
1140                 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
1141                         if (!(oct->io_qmask.iq & (1ULL << i)))
1142                                 continue;
1143                         octeon_delete_instr_queue(oct, i);
1144                 }
1145
1146                 /* fallthrough */
1147         case OCT_DEV_DISPATCH_INIT_DONE:
1148                 octeon_delete_dispatch_list(oct);
1149                 cancel_delayed_work_sync(&oct->nic_poll_work.work);
1150
1151                 /* fallthrough */
1152         case OCT_DEV_PCI_MAP_DONE:
1153
1154                 /* Soft reset the octeon device before exiting */
1155                 oct->fn_list.soft_reset(oct);
1156
1157                 octeon_unmap_pci_barx(oct, 0);
1158                 octeon_unmap_pci_barx(oct, 1);
1159
1160                 /* fallthrough */
1161         case OCT_DEV_BEGIN_STATE:
1162                 /* Disable the device, releasing the PCI INT */
1163                 pci_disable_device(oct->pci_dev);
1164
1165                 /* Nothing to be done here either */
1166                 break;
1167         }                       /* end switch (oct->status) */
1168
1169         tasklet_kill(&oct_priv->droq_tasklet);
1170 }
1171
1172 /**
1173  * \brief Send Rx control command
1174  * @param lio per-network private data
1175  * @param start_stop whether to start or stop
1176  */
1177 static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
1178 {
1179         struct octnic_ctrl_pkt nctrl;
1180
1181         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1182
1183         nctrl.ncmd.s.cmd = OCTNET_CMD_RX_CTL;
1184         nctrl.ncmd.s.param1 = start_stop;
1185         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1186         nctrl.netpndev = (u64)lio->netdev;
1187
1188         if (octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl) < 0)
1189                 netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
1190 }
1191
1192 /**
1193  * \brief Destroy NIC device interface
1194  * @param oct octeon device
1195  * @param ifidx which interface to destroy
1196  *
1197  * Cleanup associated with each interface for an Octeon device  when NIC
1198  * module is being unloaded or if initialization fails during load.
1199  */
1200 static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
1201 {
1202         struct net_device *netdev = oct->props[ifidx].netdev;
1203         struct lio *lio;
1204         struct napi_struct *napi, *n;
1205
1206         if (!netdev) {
1207                 dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
1208                         __func__, ifidx);
1209                 return;
1210         }
1211
1212         lio = GET_LIO(netdev);
1213
1214         dev_dbg(&oct->pci_dev->dev, "NIC device cleanup\n");
1215
1216         send_rx_ctrl_cmd(lio, 0);
1217
1218         if (atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING)
1219                 txqs_stop(netdev);
1220
1221         if (oct->props[lio->ifidx].napi_enabled == 1) {
1222                 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
1223                         napi_disable(napi);
1224
1225                 oct->props[lio->ifidx].napi_enabled = 0;
1226         }
1227
1228         if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
1229                 unregister_netdev(netdev);
1230
1231         delete_glists(lio);
1232
1233         free_netdev(netdev);
1234
1235         oct->props[ifidx].gmxport = -1;
1236
1237         oct->props[ifidx].netdev = NULL;
1238 }
1239
1240 /**
1241  * \brief Stop complete NIC functionality
1242  * @param oct octeon device
1243  */
1244 static int liquidio_stop_nic_module(struct octeon_device *oct)
1245 {
1246         int i, j;
1247         struct lio *lio;
1248
1249         dev_dbg(&oct->pci_dev->dev, "Stopping network interfaces\n");
1250         if (!oct->ifcount) {
1251                 dev_err(&oct->pci_dev->dev, "Init for Octeon was not completed\n");
1252                 return 1;
1253         }
1254
1255         spin_lock_bh(&oct->cmd_resp_wqlock);
1256         oct->cmd_resp_state = OCT_DRV_OFFLINE;
1257         spin_unlock_bh(&oct->cmd_resp_wqlock);
1258
1259         for (i = 0; i < oct->ifcount; i++) {
1260                 lio = GET_LIO(oct->props[i].netdev);
1261                 for (j = 0; j < lio->linfo.num_rxpciq; j++)
1262                         octeon_unregister_droq_ops(oct,
1263                                                    lio->linfo.rxpciq[j].s.q_no);
1264         }
1265
1266         for (i = 0; i < oct->ifcount; i++)
1267                 liquidio_destroy_nic_device(oct, i);
1268
1269         dev_dbg(&oct->pci_dev->dev, "Network interfaces stopped\n");
1270         return 0;
1271 }
1272
1273 /**
1274  * \brief Cleans up resources at unload time
1275  * @param pdev PCI device structure
1276  */
1277 static void liquidio_remove(struct pci_dev *pdev)
1278 {
1279         struct octeon_device *oct_dev = pci_get_drvdata(pdev);
1280
1281         dev_dbg(&oct_dev->pci_dev->dev, "Stopping device\n");
1282
1283         if (oct_dev->app_mode && (oct_dev->app_mode == CVM_DRV_NIC_APP))
1284                 liquidio_stop_nic_module(oct_dev);
1285
1286         /* Reset the octeon device and cleanup all memory allocated for
1287          * the octeon device by driver.
1288          */
1289         octeon_destroy_resources(oct_dev);
1290
1291         dev_info(&oct_dev->pci_dev->dev, "Device removed\n");
1292
1293         /* This octeon device has been removed. Update the global
1294          * data structure to reflect this. Free the device structure.
1295          */
1296         octeon_free_device_mem(oct_dev);
1297 }
1298
1299 /**
1300  * \brief Identify the Octeon device and to map the BAR address space
1301  * @param oct octeon device
1302  */
1303 static int octeon_chip_specific_setup(struct octeon_device *oct)
1304 {
1305         u32 dev_id, rev_id;
1306         int ret = 1;
1307         char *s;
1308
1309         pci_read_config_dword(oct->pci_dev, 0, &dev_id);
1310         pci_read_config_dword(oct->pci_dev, 8, &rev_id);
1311         oct->rev_id = rev_id & 0xff;
1312
1313         switch (dev_id) {
1314         case OCTEON_CN68XX_PCIID:
1315                 oct->chip_id = OCTEON_CN68XX;
1316                 ret = lio_setup_cn68xx_octeon_device(oct);
1317                 s = "CN68XX";
1318                 break;
1319
1320         case OCTEON_CN66XX_PCIID:
1321                 oct->chip_id = OCTEON_CN66XX;
1322                 ret = lio_setup_cn66xx_octeon_device(oct);
1323                 s = "CN66XX";
1324                 break;
1325
1326         default:
1327                 s = "?";
1328                 dev_err(&oct->pci_dev->dev, "Unknown device found (dev_id: %x)\n",
1329                         dev_id);
1330         }
1331
1332         if (!ret)
1333                 dev_info(&oct->pci_dev->dev, "%s PASS%d.%d %s Version: %s\n", s,
1334                          OCTEON_MAJOR_REV(oct),
1335                          OCTEON_MINOR_REV(oct),
1336                          octeon_get_conf(oct)->card_name,
1337                          LIQUIDIO_VERSION);
1338
1339         return ret;
1340 }
1341
1342 /**
1343  * \brief PCI initialization for each Octeon device.
1344  * @param oct octeon device
1345  */
1346 static int octeon_pci_os_setup(struct octeon_device *oct)
1347 {
1348         /* setup PCI stuff first */
1349         if (pci_enable_device(oct->pci_dev)) {
1350                 dev_err(&oct->pci_dev->dev, "pci_enable_device failed\n");
1351                 return 1;
1352         }
1353
1354         if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
1355                 dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
1356                 return 1;
1357         }
1358
1359         /* Enable PCI DMA Master. */
1360         pci_set_master(oct->pci_dev);
1361
1362         return 0;
1363 }
1364
1365 static inline int skb_iq(struct lio *lio, struct sk_buff *skb)
1366 {
1367         int q = 0;
1368
1369         if (netif_is_multiqueue(lio->netdev))
1370                 q = skb->queue_mapping % lio->linfo.num_txpciq;
1371
1372         return q;
1373 }
1374
1375 /**
1376  * \brief Check Tx queue state for a given network buffer
1377  * @param lio per-network private data
1378  * @param skb network buffer
1379  */
1380 static inline int check_txq_state(struct lio *lio, struct sk_buff *skb)
1381 {
1382         int q = 0, iq = 0;
1383
1384         if (netif_is_multiqueue(lio->netdev)) {
1385                 q = skb->queue_mapping;
1386                 iq = lio->linfo.txpciq[(q % (lio->linfo.num_txpciq))].s.q_no;
1387         } else {
1388                 iq = lio->txq;
1389                 q = iq;
1390         }
1391
1392         if (octnet_iq_is_full(lio->oct_dev, iq))
1393                 return 0;
1394
1395         if (__netif_subqueue_stopped(lio->netdev, q)) {
1396                 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, iq, tx_restart, 1);
1397                 wake_q(lio->netdev, q);
1398         }
1399         return 1;
1400 }
1401
1402 /**
1403  * \brief Unmap and free network buffer
1404  * @param buf buffer
1405  */
1406 static void free_netbuf(void *buf)
1407 {
1408         struct sk_buff *skb;
1409         struct octnet_buf_free_info *finfo;
1410         struct lio *lio;
1411
1412         finfo = (struct octnet_buf_free_info *)buf;
1413         skb = finfo->skb;
1414         lio = finfo->lio;
1415
1416         dma_unmap_single(&lio->oct_dev->pci_dev->dev, finfo->dptr, skb->len,
1417                          DMA_TO_DEVICE);
1418
1419         check_txq_state(lio, skb);
1420
1421         tx_buffer_free(skb);
1422 }
1423
1424 /**
1425  * \brief Unmap and free gather buffer
1426  * @param buf buffer
1427  */
1428 static void free_netsgbuf(void *buf)
1429 {
1430         struct octnet_buf_free_info *finfo;
1431         struct sk_buff *skb;
1432         struct lio *lio;
1433         struct octnic_gather *g;
1434         int i, frags, iq;
1435
1436         finfo = (struct octnet_buf_free_info *)buf;
1437         skb = finfo->skb;
1438         lio = finfo->lio;
1439         g = finfo->g;
1440         frags = skb_shinfo(skb)->nr_frags;
1441
1442         dma_unmap_single(&lio->oct_dev->pci_dev->dev,
1443                          g->sg[0].ptr[0], (skb->len - skb->data_len),
1444                          DMA_TO_DEVICE);
1445
1446         i = 1;
1447         while (frags--) {
1448                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];
1449
1450                 pci_unmap_page((lio->oct_dev)->pci_dev,
1451                                g->sg[(i >> 2)].ptr[(i & 3)],
1452                                frag->size, DMA_TO_DEVICE);
1453                 i++;
1454         }
1455
1456         dma_sync_single_for_cpu(&lio->oct_dev->pci_dev->dev,
1457                                 g->sg_dma_ptr, g->sg_size, DMA_TO_DEVICE);
1458
1459         iq = skb_iq(lio, skb);
1460         spin_lock(&lio->glist_lock[iq]);
1461         list_add_tail(&g->list, &lio->glist[iq]);
1462         spin_unlock(&lio->glist_lock[iq]);
1463
1464         check_txq_state(lio, skb);     /* mq support: sub-queue state check */
1465
1466         tx_buffer_free(skb);
1467 }
1468
1469 /**
1470  * \brief Unmap and free gather buffer with response
1471  * @param buf buffer
1472  */
1473 static void free_netsgbuf_with_resp(void *buf)
1474 {
1475         struct octeon_soft_command *sc;
1476         struct octnet_buf_free_info *finfo;
1477         struct sk_buff *skb;
1478         struct lio *lio;
1479         struct octnic_gather *g;
1480         int i, frags, iq;
1481
1482         sc = (struct octeon_soft_command *)buf;
1483         skb = (struct sk_buff *)sc->callback_arg;
1484         finfo = (struct octnet_buf_free_info *)&skb->cb;
1485
1486         lio = finfo->lio;
1487         g = finfo->g;
1488         frags = skb_shinfo(skb)->nr_frags;
1489
1490         dma_unmap_single(&lio->oct_dev->pci_dev->dev,
1491                          g->sg[0].ptr[0], (skb->len - skb->data_len),
1492                          DMA_TO_DEVICE);
1493
1494         i = 1;
1495         while (frags--) {
1496                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];
1497
1498                 pci_unmap_page((lio->oct_dev)->pci_dev,
1499                                g->sg[(i >> 2)].ptr[(i & 3)],
1500                                frag->size, DMA_TO_DEVICE);
1501                 i++;
1502         }
1503
1504         dma_sync_single_for_cpu(&lio->oct_dev->pci_dev->dev,
1505                                 g->sg_dma_ptr, g->sg_size, DMA_TO_DEVICE);
1506
1507         iq = skb_iq(lio, skb);
1508
1509         spin_lock(&lio->glist_lock[iq]);
1510         list_add_tail(&g->list, &lio->glist[iq]);
1511         spin_unlock(&lio->glist_lock[iq]);
1512
1513         /* Don't free the skb yet */
1514
1515         check_txq_state(lio, skb);
1516 }
1517
1518 /**
1519  * \brief Adjust ptp frequency
1520  * @param ptp PTP clock info
1521  * @param ppb how much to adjust by, in parts-per-billion
1522  */
1523 static int liquidio_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
1524 {
1525         struct lio *lio = container_of(ptp, struct lio, ptp_info);
1526         struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
1527         u64 comp, delta;
1528         unsigned long flags;
1529         bool neg_adj = false;
1530
1531         if (ppb < 0) {
1532                 neg_adj = true;
1533                 ppb = -ppb;
1534         }
1535
1536         /* The hardware adds the clock compensation value to the
1537          * PTP clock on every coprocessor clock cycle, so we
1538          * compute the delta in terms of coprocessor clocks.
1539          */
1540         delta = (u64)ppb << 32;
1541         do_div(delta, oct->coproc_clock_rate);
1542
1543         spin_lock_irqsave(&lio->ptp_lock, flags);
1544         comp = lio_pci_readq(oct, CN6XXX_MIO_PTP_CLOCK_COMP);
1545         if (neg_adj)
1546                 comp -= delta;
1547         else
1548                 comp += delta;
1549         lio_pci_writeq(oct, comp, CN6XXX_MIO_PTP_CLOCK_COMP);
1550         spin_unlock_irqrestore(&lio->ptp_lock, flags);
1551
1552         return 0;
1553 }
1554
1555 /**
1556  * \brief Adjust ptp time
1557  * @param ptp PTP clock info
1558  * @param delta how much to adjust by, in nanosecs
1559  */
1560 static int liquidio_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
1561 {
1562         unsigned long flags;
1563         struct lio *lio = container_of(ptp, struct lio, ptp_info);
1564
1565         spin_lock_irqsave(&lio->ptp_lock, flags);
1566         lio->ptp_adjust += delta;
1567         spin_unlock_irqrestore(&lio->ptp_lock, flags);
1568
1569         return 0;
1570 }
1571
1572 /**
1573  * \brief Get hardware clock time, including any adjustment
1574  * @param ptp PTP clock info
1575  * @param ts timespec
1576  */
1577 static int liquidio_ptp_gettime(struct ptp_clock_info *ptp,
1578                                 struct timespec64 *ts)
1579 {
1580         u64 ns;
1581         unsigned long flags;
1582         struct lio *lio = container_of(ptp, struct lio, ptp_info);
1583         struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
1584
1585         spin_lock_irqsave(&lio->ptp_lock, flags);
1586         ns = lio_pci_readq(oct, CN6XXX_MIO_PTP_CLOCK_HI);
1587         ns += lio->ptp_adjust;
1588         spin_unlock_irqrestore(&lio->ptp_lock, flags);
1589
1590         *ts = ns_to_timespec64(ns);
1591
1592         return 0;
1593 }
1594
1595 /**
1596  * \brief Set hardware clock time. Reset adjustment
1597  * @param ptp PTP clock info
1598  * @param ts timespec
1599  */
1600 static int liquidio_ptp_settime(struct ptp_clock_info *ptp,
1601                                 const struct timespec64 *ts)
1602 {
1603         u64 ns;
1604         unsigned long flags;
1605         struct lio *lio = container_of(ptp, struct lio, ptp_info);
1606         struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
1607
1608         ns = timespec_to_ns(ts);
1609
1610         spin_lock_irqsave(&lio->ptp_lock, flags);
1611         lio_pci_writeq(oct, ns, CN6XXX_MIO_PTP_CLOCK_HI);
1612         lio->ptp_adjust = 0;
1613         spin_unlock_irqrestore(&lio->ptp_lock, flags);
1614
1615         return 0;
1616 }
1617
1618 /**
1619  * \brief Check if PTP is enabled
1620  * @param ptp PTP clock info
1621  * @param rq request
1622  * @param on is it on
1623  */
1624 static int
1625 liquidio_ptp_enable(struct ptp_clock_info *ptp __attribute__((unused)),
1626                     struct ptp_clock_request *rq __attribute__((unused)),
1627                     int on __attribute__((unused)))
1628 {
1629         return -EOPNOTSUPP;
1630 }
1631
1632 /**
1633  * \brief Open PTP clock source
1634  * @param netdev network device
1635  */
1636 static void oct_ptp_open(struct net_device *netdev)
1637 {
1638         struct lio *lio = GET_LIO(netdev);
1639         struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
1640
1641         spin_lock_init(&lio->ptp_lock);
1642
1643         snprintf(lio->ptp_info.name, 16, "%s", netdev->name);
1644         lio->ptp_info.owner = THIS_MODULE;
1645         lio->ptp_info.max_adj = 250000000;
1646         lio->ptp_info.n_alarm = 0;
1647         lio->ptp_info.n_ext_ts = 0;
1648         lio->ptp_info.n_per_out = 0;
1649         lio->ptp_info.pps = 0;
1650         lio->ptp_info.adjfreq = liquidio_ptp_adjfreq;
1651         lio->ptp_info.adjtime = liquidio_ptp_adjtime;
1652         lio->ptp_info.gettime64 = liquidio_ptp_gettime;
1653         lio->ptp_info.settime64 = liquidio_ptp_settime;
1654         lio->ptp_info.enable = liquidio_ptp_enable;
1655
1656         lio->ptp_adjust = 0;
1657
1658         lio->ptp_clock = ptp_clock_register(&lio->ptp_info,
1659                                              &oct->pci_dev->dev);
1660
1661         if (IS_ERR(lio->ptp_clock))
1662                 lio->ptp_clock = NULL;
1663 }
1664
1665 /**
1666  * \brief Init PTP clock
1667  * @param oct octeon device
1668  */
1669 static void liquidio_ptp_init(struct octeon_device *oct)
1670 {
1671         u64 clock_comp, cfg;
1672
1673         clock_comp = (u64)NSEC_PER_SEC << 32;
1674         do_div(clock_comp, oct->coproc_clock_rate);
1675         lio_pci_writeq(oct, clock_comp, CN6XXX_MIO_PTP_CLOCK_COMP);
1676
1677         /* Enable */
1678         cfg = lio_pci_readq(oct, CN6XXX_MIO_PTP_CLOCK_CFG);
1679         lio_pci_writeq(oct, cfg | 0x01, CN6XXX_MIO_PTP_CLOCK_CFG);
1680 }
1681
1682 /**
1683  * \brief Load firmware to device
1684  * @param oct octeon device
1685  *
1686  * Maps device to firmware filename, requests firmware, and downloads it
1687  */
1688 static int load_firmware(struct octeon_device *oct)
1689 {
1690         int ret = 0;
1691         const struct firmware *fw;
1692         char fw_name[LIO_MAX_FW_FILENAME_LEN];
1693         char *tmp_fw_type;
1694
1695         if (strncmp(fw_type, LIO_FW_NAME_TYPE_NONE,
1696                     sizeof(LIO_FW_NAME_TYPE_NONE)) == 0) {
1697                 dev_info(&oct->pci_dev->dev, "Skipping firmware load\n");
1698                 return ret;
1699         }
1700
1701         if (fw_type[0] == '\0')
1702                 tmp_fw_type = LIO_FW_NAME_TYPE_NIC;
1703         else
1704                 tmp_fw_type = fw_type;
1705
1706         sprintf(fw_name, "%s%s%s_%s%s", LIO_FW_DIR, LIO_FW_BASE_NAME,
1707                 octeon_get_conf(oct)->card_name, tmp_fw_type,
1708                 LIO_FW_NAME_SUFFIX);
1709
1710         ret = request_firmware(&fw, fw_name, &oct->pci_dev->dev);
1711         if (ret) {
1712                 dev_err(&oct->pci_dev->dev, "Request firmware failed. Could not find file %s.\n.",
1713                         fw_name);
1714                 release_firmware(fw);
1715                 return ret;
1716         }
1717
1718         ret = octeon_download_firmware(oct, fw->data, fw->size);
1719
1720         release_firmware(fw);
1721
1722         return ret;
1723 }
1724
1725 /**
1726  * \brief Setup output queue
1727  * @param oct octeon device
1728  * @param q_no which queue
1729  * @param num_descs how many descriptors
1730  * @param desc_size size of each descriptor
1731  * @param app_ctx application context
1732  */
1733 static int octeon_setup_droq(struct octeon_device *oct, int q_no, int num_descs,
1734                              int desc_size, void *app_ctx)
1735 {
1736         int ret_val = 0;
1737
1738         dev_dbg(&oct->pci_dev->dev, "Creating Droq: %d\n", q_no);
1739         /* droq creation and local register settings. */
1740         ret_val = octeon_create_droq(oct, q_no, num_descs, desc_size, app_ctx);
1741         if (ret_val < 0)
1742                 return ret_val;
1743
1744         if (ret_val == 1) {
1745                 dev_dbg(&oct->pci_dev->dev, "Using default droq %d\n", q_no);
1746                 return 0;
1747         }
1748         /* tasklet creation for the droq */
1749
1750         /* Enable the droq queues */
1751         octeon_set_droq_pkt_op(oct, q_no, 1);
1752
1753         /* Send Credit for Octeon Output queues. Credits are always
1754          * sent after the output queue is enabled.
1755          */
1756         writel(oct->droq[q_no]->max_count,
1757                oct->droq[q_no]->pkts_credit_reg);
1758
1759         return ret_val;
1760 }
1761
1762 /**
1763  * \brief Callback for getting interface configuration
1764  * @param status status of request
1765  * @param buf pointer to resp structure
1766  */
1767 static void if_cfg_callback(struct octeon_device *oct,
1768                             u32 status __attribute__((unused)),
1769                             void *buf)
1770 {
1771         struct octeon_soft_command *sc = (struct octeon_soft_command *)buf;
1772         struct liquidio_if_cfg_resp *resp;
1773         struct liquidio_if_cfg_context *ctx;
1774
1775         resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
1776         ctx  = (struct liquidio_if_cfg_context *)sc->ctxptr;
1777
1778         oct = lio_get_device(ctx->octeon_id);
1779         if (resp->status)
1780                 dev_err(&oct->pci_dev->dev, "nic if cfg instruction failed. Status: %llx\n",
1781                         CVM_CAST64(resp->status));
1782         WRITE_ONCE(ctx->cond, 1);
1783
1784         snprintf(oct->fw_info.liquidio_firmware_version, 32, "%s",
1785                  resp->cfg_info.liquidio_firmware_version);
1786
1787         /* This barrier is required to be sure that the response has been
1788          * written fully before waking up the handler
1789          */
1790         wmb();
1791
1792         wake_up_interruptible(&ctx->wc);
1793 }
1794
1795 /**
1796  * \brief Select queue based on hash
1797  * @param dev Net device
1798  * @param skb sk_buff structure
1799  * @returns selected queue number
1800  */
1801 static u16 select_q(struct net_device *dev, struct sk_buff *skb,
1802                     void *accel_priv __attribute__((unused)),
1803                     select_queue_fallback_t fallback __attribute__((unused)))
1804 {
1805         u32 qindex = 0;
1806         struct lio *lio;
1807
1808         lio = GET_LIO(dev);
1809         qindex = skb_tx_hash(dev, skb);
1810
1811         return (u16)(qindex % (lio->linfo.num_txpciq));
1812 }
1813
1814 /** Routine to push packets arriving on Octeon interface upto network layer.
1815  * @param oct_id   - octeon device id.
1816  * @param skbuff   - skbuff struct to be passed to network layer.
1817  * @param len      - size of total data received.
1818  * @param rh       - Control header associated with the packet
1819  * @param param    - additional control data with the packet
1820  * @param arg      - farg registered in droq_ops
1821  */
1822 static void
1823 liquidio_push_packet(u32 octeon_id __attribute__((unused)),
1824                      void *skbuff,
1825                      u32 len,
1826                      union octeon_rh *rh,
1827                      void *param,
1828                      void *arg)
1829 {
1830         struct napi_struct *napi = param;
1831         struct sk_buff *skb = (struct sk_buff *)skbuff;
1832         struct skb_shared_hwtstamps *shhwtstamps;
1833         u64 ns;
1834         u16 vtag = 0;
1835         struct net_device *netdev = (struct net_device *)arg;
1836         struct octeon_droq *droq = container_of(param, struct octeon_droq,
1837                                                 napi);
1838         if (netdev) {
1839                 int packet_was_received;
1840                 struct lio *lio = GET_LIO(netdev);
1841                 struct octeon_device *oct = lio->oct_dev;
1842
1843                 /* Do not proceed if the interface is not in RUNNING state. */
1844                 if (!ifstate_check(lio, LIO_IFSTATE_RUNNING)) {
1845                         recv_buffer_free(skb);
1846                         droq->stats.rx_dropped++;
1847                         return;
1848                 }
1849
1850                 skb->dev = netdev;
1851
1852                 skb_record_rx_queue(skb, droq->q_no);
1853                 if (likely(len > MIN_SKB_SIZE)) {
1854                         struct octeon_skb_page_info *pg_info;
1855                         unsigned char *va;
1856
1857                         pg_info = ((struct octeon_skb_page_info *)(skb->cb));
1858                         if (pg_info->page) {
1859                                 /* For Paged allocation use the frags */
1860                                 va = page_address(pg_info->page) +
1861                                         pg_info->page_offset;
1862                                 memcpy(skb->data, va, MIN_SKB_SIZE);
1863                                 skb_put(skb, MIN_SKB_SIZE);
1864                                 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
1865                                                 pg_info->page,
1866                                                 pg_info->page_offset +
1867                                                 MIN_SKB_SIZE,
1868                                                 len - MIN_SKB_SIZE,
1869                                                 LIO_RXBUFFER_SZ);
1870                         }
1871                 } else {
1872                         struct octeon_skb_page_info *pg_info =
1873                                 ((struct octeon_skb_page_info *)(skb->cb));
1874                         skb_copy_to_linear_data(skb, page_address(pg_info->page)
1875                                                 + pg_info->page_offset, len);
1876                         skb_put(skb, len);
1877                         put_page(pg_info->page);
1878                 }
1879
1880                 if (((oct->chip_id == OCTEON_CN66XX) ||
1881                      (oct->chip_id == OCTEON_CN68XX)) &&
1882                     ptp_enable) {
1883                         if (rh->r_dh.has_hwtstamp) {
1884                                 /* timestamp is included from the hardware at
1885                                  * the beginning of the packet.
1886                                  */
1887                                 if (ifstate_check
1888                                     (lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED)) {
1889                                         /* Nanoseconds are in the first 64-bits
1890                                          * of the packet.
1891                                          */
1892                                         memcpy(&ns, (skb->data), sizeof(ns));
1893                                         shhwtstamps = skb_hwtstamps(skb);
1894                                         shhwtstamps->hwtstamp =
1895                                                 ns_to_ktime(ns +
1896                                                             lio->ptp_adjust);
1897                                 }
1898                                 skb_pull(skb, sizeof(ns));
1899                         }
1900                 }
1901
1902                 skb->protocol = eth_type_trans(skb, skb->dev);
1903                 if ((netdev->features & NETIF_F_RXCSUM) &&
1904                     (((rh->r_dh.encap_on) &&
1905                       (rh->r_dh.csum_verified & CNNIC_TUN_CSUM_VERIFIED)) ||
1906                      (!(rh->r_dh.encap_on) &&
1907                       (rh->r_dh.csum_verified & CNNIC_CSUM_VERIFIED))))
1908                         /* checksum has already been verified */
1909                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1910                 else
1911                         skb->ip_summed = CHECKSUM_NONE;
1912
1913                 /* Setting Encapsulation field on basis of status received
1914                  * from the firmware
1915                  */
1916                 if (rh->r_dh.encap_on) {
1917                         skb->encapsulation = 1;
1918                         skb->csum_level = 1;
1919                         droq->stats.rx_vxlan++;
1920                 }
1921
1922                 /* inbound VLAN tag */
1923                 if ((netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
1924                     (rh->r_dh.vlan != 0)) {
1925                         u16 vid = rh->r_dh.vlan;
1926                         u16 priority = rh->r_dh.priority;
1927
1928                         vtag = priority << 13 | vid;
1929                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vtag);
1930                 }
1931
1932                 packet_was_received = napi_gro_receive(napi, skb) != GRO_DROP;
1933
1934                 if (packet_was_received) {
1935                         droq->stats.rx_bytes_received += len;
1936                         droq->stats.rx_pkts_received++;
1937                         netdev->last_rx = jiffies;
1938                 } else {
1939                         droq->stats.rx_dropped++;
1940                         netif_info(lio, rx_err, lio->netdev,
1941                                    "droq:%d  error rx_dropped:%llu\n",
1942                                    droq->q_no, droq->stats.rx_dropped);
1943                 }
1944
1945         } else {
1946                 recv_buffer_free(skb);
1947         }
1948 }
1949
1950 /**
1951  * \brief wrapper for calling napi_schedule
1952  * @param param parameters to pass to napi_schedule
1953  *
1954  * Used when scheduling on different CPUs
1955  */
1956 static void napi_schedule_wrapper(void *param)
1957 {
1958         struct napi_struct *napi = param;
1959
1960         napi_schedule(napi);
1961 }
1962
1963 /**
1964  * \brief callback when receive interrupt occurs and we are in NAPI mode
1965  * @param arg pointer to octeon output queue
1966  */
1967 static void liquidio_napi_drv_callback(void *arg)
1968 {
1969         struct octeon_droq *droq = arg;
1970         int this_cpu = smp_processor_id();
1971
1972         if (droq->cpu_id == this_cpu) {
1973                 napi_schedule(&droq->napi);
1974         } else {
1975                 struct call_single_data *csd = &droq->csd;
1976
1977                 csd->func = napi_schedule_wrapper;
1978                 csd->info = &droq->napi;
1979                 csd->flags = 0;
1980
1981                 smp_call_function_single_async(droq->cpu_id, csd);
1982         }
1983 }
1984
1985 /**
1986  * \brief Entry point for NAPI polling
1987  * @param napi NAPI structure
1988  * @param budget maximum number of items to process
1989  */
1990 static int liquidio_napi_poll(struct napi_struct *napi, int budget)
1991 {
1992         struct octeon_droq *droq;
1993         int work_done;
1994         int tx_done = 0, iq_no;
1995         struct octeon_instr_queue *iq;
1996         struct octeon_device *oct;
1997
1998         droq = container_of(napi, struct octeon_droq, napi);
1999         oct = droq->oct_dev;
2000         iq_no = droq->q_no;
2001         /* Handle Droq descriptors */
2002         work_done = octeon_process_droq_poll_cmd(oct, droq->q_no,
2003                                                  POLL_EVENT_PROCESS_PKTS,
2004                                                  budget);
2005
2006         /* Flush the instruction queue */
2007         iq = oct->instr_queue[iq_no];
2008         if (iq) {
2009                 /* Process iq buffers with in the budget limits */
2010                 tx_done = octeon_flush_iq(oct, iq, 1, budget);
2011                 /* Update iq read-index rather than waiting for next interrupt.
2012                  * Return back if tx_done is false.
2013                  */
2014                 update_txq_status(oct, iq_no);
2015                 /*tx_done = (iq->flush_index == iq->octeon_read_index);*/
2016         } else {
2017                 dev_err(&oct->pci_dev->dev, "%s:  iq (%d) num invalid\n",
2018                         __func__, iq_no);
2019         }
2020
2021         if ((work_done < budget) && (tx_done)) {
2022                 napi_complete(napi);
2023                 octeon_process_droq_poll_cmd(droq->oct_dev, droq->q_no,
2024                                              POLL_EVENT_ENABLE_INTR, 0);
2025                 return 0;
2026         }
2027
2028         return (!tx_done) ? (budget) : (work_done);
2029 }
2030
2031 /**
2032  * \brief Setup input and output queues
2033  * @param octeon_dev octeon device
2034  * @param ifidx  Interface Index
2035  *
2036  * Note: Queues are with respect to the octeon device. Thus
2037  * an input queue is for egress packets, and output queues
2038  * are for ingress packets.
2039  */
2040 static inline int setup_io_queues(struct octeon_device *octeon_dev,
2041                                   int ifidx)
2042 {
2043         struct octeon_droq_ops droq_ops;
2044         struct net_device *netdev;
2045         static int cpu_id;
2046         static int cpu_id_modulus;
2047         struct octeon_droq *droq;
2048         struct napi_struct *napi;
2049         int q, q_no, retval = 0;
2050         struct lio *lio;
2051         int num_tx_descs;
2052
2053         netdev = octeon_dev->props[ifidx].netdev;
2054
2055         lio = GET_LIO(netdev);
2056
2057         memset(&droq_ops, 0, sizeof(struct octeon_droq_ops));
2058
2059         droq_ops.fptr = liquidio_push_packet;
2060         droq_ops.farg = (void *)netdev;
2061
2062         droq_ops.poll_mode = 1;
2063         droq_ops.napi_fn = liquidio_napi_drv_callback;
2064         cpu_id = 0;
2065         cpu_id_modulus = num_present_cpus();
2066
2067         /* set up DROQs. */
2068         for (q = 0; q < lio->linfo.num_rxpciq; q++) {
2069                 q_no = lio->linfo.rxpciq[q].s.q_no;
2070                 dev_dbg(&octeon_dev->pci_dev->dev,
2071                         "setup_io_queues index:%d linfo.rxpciq.s.q_no:%d\n",
2072                         q, q_no);
2073                 retval = octeon_setup_droq(octeon_dev, q_no,
2074                                            CFG_GET_NUM_RX_DESCS_NIC_IF
2075                                                    (octeon_get_conf(octeon_dev),
2076                                                    lio->ifidx),
2077                                            CFG_GET_NUM_RX_BUF_SIZE_NIC_IF
2078                                                    (octeon_get_conf(octeon_dev),
2079                                                    lio->ifidx), NULL);
2080                 if (retval) {
2081                         dev_err(&octeon_dev->pci_dev->dev,
2082                                 "%s : Runtime DROQ(RxQ) creation failed.\n",
2083                                 __func__);
2084                         return 1;
2085                 }
2086
2087                 droq = octeon_dev->droq[q_no];
2088                 napi = &droq->napi;
2089                 dev_dbg(&octeon_dev->pci_dev->dev,
2090                         "netif_napi_add netdev:%llx oct:%llx\n",
2091                         (u64)netdev,
2092                         (u64)octeon_dev);
2093                 netif_napi_add(netdev, napi, liquidio_napi_poll, 64);
2094
2095                 /* designate a CPU for this droq */
2096                 droq->cpu_id = cpu_id;
2097                 cpu_id++;
2098                 if (cpu_id >= cpu_id_modulus)
2099                         cpu_id = 0;
2100
2101                 octeon_register_droq_ops(octeon_dev, q_no, &droq_ops);
2102         }
2103
2104         /* set up IQs. */
2105         for (q = 0; q < lio->linfo.num_txpciq; q++) {
2106                 num_tx_descs = CFG_GET_NUM_TX_DESCS_NIC_IF(octeon_get_conf
2107                                                            (octeon_dev),
2108                                                            lio->ifidx);
2109                 retval = octeon_setup_iq(octeon_dev, ifidx, q,
2110                                          lio->linfo.txpciq[q], num_tx_descs,
2111                                          netdev_get_tx_queue(netdev, q));
2112                 if (retval) {
2113                         dev_err(&octeon_dev->pci_dev->dev,
2114                                 " %s : Runtime IQ(TxQ) creation failed.\n",
2115                                 __func__);
2116                         return 1;
2117                 }
2118         }
2119
2120         return 0;
2121 }
2122
2123 /**
2124  * \brief Poll routine for checking transmit queue status
2125  * @param work work_struct data structure
2126  */
2127 static void octnet_poll_check_txq_status(struct work_struct *work)
2128 {
2129         struct cavium_wk *wk = (struct cavium_wk *)work;
2130         struct lio *lio = (struct lio *)wk->ctxptr;
2131
2132         if (!ifstate_check(lio, LIO_IFSTATE_RUNNING))
2133                 return;
2134
2135         check_txq_status(lio);
2136         queue_delayed_work(lio->txq_status_wq.wq,
2137                            &lio->txq_status_wq.wk.work, msecs_to_jiffies(1));
2138 }
2139
2140 /**
2141  * \brief Sets up the txq poll check
2142  * @param netdev network device
2143  */
2144 static inline void setup_tx_poll_fn(struct net_device *netdev)
2145 {
2146         struct lio *lio = GET_LIO(netdev);
2147         struct octeon_device *oct = lio->oct_dev;
2148
2149         lio->txq_status_wq.wq = alloc_workqueue("txq-status",
2150                                                 WQ_MEM_RECLAIM, 0);
2151         if (!lio->txq_status_wq.wq) {
2152                 dev_err(&oct->pci_dev->dev, "unable to create cavium txq status wq\n");
2153                 return;
2154         }
2155         INIT_DELAYED_WORK(&lio->txq_status_wq.wk.work,
2156                           octnet_poll_check_txq_status);
2157         lio->txq_status_wq.wk.ctxptr = lio;
2158         queue_delayed_work(lio->txq_status_wq.wq,
2159                            &lio->txq_status_wq.wk.work, msecs_to_jiffies(1));
2160 }
2161
2162 static inline void cleanup_tx_poll_fn(struct net_device *netdev)
2163 {
2164         struct lio *lio = GET_LIO(netdev);
2165
2166         cancel_delayed_work_sync(&lio->txq_status_wq.wk.work);
2167         destroy_workqueue(lio->txq_status_wq.wq);
2168 }
2169
2170 /**
2171  * \brief Net device open for LiquidIO
2172  * @param netdev network device
2173  */
2174 static int liquidio_open(struct net_device *netdev)
2175 {
2176         struct lio *lio = GET_LIO(netdev);
2177         struct octeon_device *oct = lio->oct_dev;
2178         struct napi_struct *napi, *n;
2179
2180         if (oct->props[lio->ifidx].napi_enabled == 0) {
2181                 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
2182                         napi_enable(napi);
2183
2184                 oct->props[lio->ifidx].napi_enabled = 1;
2185         }
2186
2187         oct_ptp_open(netdev);
2188
2189         ifstate_set(lio, LIO_IFSTATE_RUNNING);
2190
2191         setup_tx_poll_fn(netdev);
2192
2193         start_txq(netdev);
2194
2195         netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
2196
2197         /* tell Octeon to start forwarding packets to host */
2198         send_rx_ctrl_cmd(lio, 1);
2199
2200         /* Ready for link status updates */
2201         lio->intf_open = 1;
2202
2203         dev_info(&oct->pci_dev->dev, "%s interface is opened\n",
2204                  netdev->name);
2205
2206         return 0;
2207 }
2208
2209 /**
2210  * \brief Net device stop for LiquidIO
2211  * @param netdev network device
2212  */
2213 static int liquidio_stop(struct net_device *netdev)
2214 {
2215         struct lio *lio = GET_LIO(netdev);
2216         struct octeon_device *oct = lio->oct_dev;
2217
2218         ifstate_reset(lio, LIO_IFSTATE_RUNNING);
2219
2220         netif_tx_disable(netdev);
2221
2222         /* Inform that netif carrier is down */
2223         netif_carrier_off(netdev);
2224         lio->intf_open = 0;
2225         lio->linfo.link.s.link_up = 0;
2226         lio->link_changes++;
2227
2228         /* Pause for a moment and wait for Octeon to flush out (to the wire) any
2229          * egress packets that are in-flight.
2230          */
2231         set_current_state(TASK_INTERRUPTIBLE);
2232         schedule_timeout(msecs_to_jiffies(100));
2233
2234         /* Now it should be safe to tell Octeon that nic interface is down. */
2235         send_rx_ctrl_cmd(lio, 0);
2236
2237         cleanup_tx_poll_fn(netdev);
2238
2239         if (lio->ptp_clock) {
2240                 ptp_clock_unregister(lio->ptp_clock);
2241                 lio->ptp_clock = NULL;
2242         }
2243
2244         dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
2245
2246         return 0;
2247 }
2248
2249 /**
2250  * \brief Converts a mask based on net device flags
2251  * @param netdev network device
2252  *
2253  * This routine generates a octnet_ifflags mask from the net device flags
2254  * received from the OS.
2255  */
2256 static inline enum octnet_ifflags get_new_flags(struct net_device *netdev)
2257 {
2258         enum octnet_ifflags f = OCTNET_IFFLAG_UNICAST;
2259
2260         if (netdev->flags & IFF_PROMISC)
2261                 f |= OCTNET_IFFLAG_PROMISC;
2262
2263         if (netdev->flags & IFF_ALLMULTI)
2264                 f |= OCTNET_IFFLAG_ALLMULTI;
2265
2266         if (netdev->flags & IFF_MULTICAST) {
2267                 f |= OCTNET_IFFLAG_MULTICAST;
2268
2269                 /* Accept all multicast addresses if there are more than we
2270                  * can handle
2271                  */
2272                 if (netdev_mc_count(netdev) > MAX_OCTEON_MULTICAST_ADDR)
2273                         f |= OCTNET_IFFLAG_ALLMULTI;
2274         }
2275
2276         if (netdev->flags & IFF_BROADCAST)
2277                 f |= OCTNET_IFFLAG_BROADCAST;
2278
2279         return f;
2280 }
2281
2282 /**
2283  * \brief Net device set_multicast_list
2284  * @param netdev network device
2285  */
2286 static void liquidio_set_mcast_list(struct net_device *netdev)
2287 {
2288         struct lio *lio = GET_LIO(netdev);
2289         struct octeon_device *oct = lio->oct_dev;
2290         struct octnic_ctrl_pkt nctrl;
2291         struct netdev_hw_addr *ha;
2292         u64 *mc;
2293         int ret;
2294         int mc_count = min(netdev_mc_count(netdev), MAX_OCTEON_MULTICAST_ADDR);
2295
2296         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
2297
2298         /* Create a ctrl pkt command to be sent to core app. */
2299         nctrl.ncmd.u64 = 0;
2300         nctrl.ncmd.s.cmd = OCTNET_CMD_SET_MULTI_LIST;
2301         nctrl.ncmd.s.param1 = get_new_flags(netdev);
2302         nctrl.ncmd.s.param2 = mc_count;
2303         nctrl.ncmd.s.more = mc_count;
2304         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
2305         nctrl.netpndev = (u64)netdev;
2306         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
2307
2308         /* copy all the addresses into the udd */
2309         mc = &nctrl.udd[0];
2310         netdev_for_each_mc_addr(ha, netdev) {
2311                 *mc = 0;
2312                 memcpy(((u8 *)mc) + 2, ha->addr, ETH_ALEN);
2313                 /* no need to swap bytes */
2314
2315                 if (++mc > &nctrl.udd[mc_count])
2316                         break;
2317         }
2318
2319         /* Apparently, any activity in this call from the kernel has to
2320          * be atomic. So we won't wait for response.
2321          */
2322         nctrl.wait_time = 0;
2323
2324         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
2325         if (ret < 0) {
2326                 dev_err(&oct->pci_dev->dev, "DEVFLAGS change failed in core (ret: 0x%x)\n",
2327                         ret);
2328         }
2329 }
2330
2331 /**
2332  * \brief Net device set_mac_address
2333  * @param netdev network device
2334  */
2335 static int liquidio_set_mac(struct net_device *netdev, void *p)
2336 {
2337         int ret = 0;
2338         struct lio *lio = GET_LIO(netdev);
2339         struct octeon_device *oct = lio->oct_dev;
2340         struct sockaddr *addr = (struct sockaddr *)p;
2341         struct octnic_ctrl_pkt nctrl;
2342
2343         if (!is_valid_ether_addr(addr->sa_data))
2344                 return -EADDRNOTAVAIL;
2345
2346         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
2347
2348         nctrl.ncmd.u64 = 0;
2349         nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
2350         nctrl.ncmd.s.param1 = 0;
2351         nctrl.ncmd.s.more = 1;
2352         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
2353         nctrl.netpndev = (u64)netdev;
2354         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
2355         nctrl.wait_time = 100;
2356
2357         nctrl.udd[0] = 0;
2358         /* The MAC Address is presented in network byte order. */
2359         memcpy((u8 *)&nctrl.udd[0] + 2, addr->sa_data, ETH_ALEN);
2360
2361         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
2362         if (ret < 0) {
2363                 dev_err(&oct->pci_dev->dev, "MAC Address change failed\n");
2364                 return -ENOMEM;
2365         }
2366         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2367         memcpy(((u8 *)&lio->linfo.hw_addr) + 2, addr->sa_data, ETH_ALEN);
2368
2369         return 0;
2370 }
2371
2372 /**
2373  * \brief Net device get_stats
2374  * @param netdev network device
2375  */
2376 static struct net_device_stats *liquidio_get_stats(struct net_device *netdev)
2377 {
2378         struct lio *lio = GET_LIO(netdev);
2379         struct net_device_stats *stats = &netdev->stats;
2380         struct octeon_device *oct;
2381         u64 pkts = 0, drop = 0, bytes = 0;
2382         struct oct_droq_stats *oq_stats;
2383         struct oct_iq_stats *iq_stats;
2384         int i, iq_no, oq_no;
2385
2386         oct = lio->oct_dev;
2387
2388         for (i = 0; i < lio->linfo.num_txpciq; i++) {
2389                 iq_no = lio->linfo.txpciq[i].s.q_no;
2390                 iq_stats = &oct->instr_queue[iq_no]->stats;
2391                 pkts += iq_stats->tx_done;
2392                 drop += iq_stats->tx_dropped;
2393                 bytes += iq_stats->tx_tot_bytes;
2394         }
2395
2396         stats->tx_packets = pkts;
2397         stats->tx_bytes = bytes;
2398         stats->tx_dropped = drop;
2399
2400         pkts = 0;
2401         drop = 0;
2402         bytes = 0;
2403
2404         for (i = 0; i < lio->linfo.num_rxpciq; i++) {
2405                 oq_no = lio->linfo.rxpciq[i].s.q_no;
2406                 oq_stats = &oct->droq[oq_no]->stats;
2407                 pkts += oq_stats->rx_pkts_received;
2408                 drop += (oq_stats->rx_dropped +
2409                          oq_stats->dropped_nodispatch +
2410                          oq_stats->dropped_toomany +
2411                          oq_stats->dropped_nomem);
2412                 bytes += oq_stats->rx_bytes_received;
2413         }
2414
2415         stats->rx_bytes = bytes;
2416         stats->rx_packets = pkts;
2417         stats->rx_dropped = drop;
2418
2419         return stats;
2420 }
2421
2422 /**
2423  * \brief Net device change_mtu
2424  * @param netdev network device
2425  */
2426 static int liquidio_change_mtu(struct net_device *netdev, int new_mtu)
2427 {
2428         struct lio *lio = GET_LIO(netdev);
2429         struct octeon_device *oct = lio->oct_dev;
2430         struct octnic_ctrl_pkt nctrl;
2431         int ret = 0;
2432
2433         /* Limit the MTU to make sure the ethernet packets are between 68 bytes
2434          * and 16000 bytes
2435          */
2436         if ((new_mtu < LIO_MIN_MTU_SIZE) ||
2437             (new_mtu > LIO_MAX_MTU_SIZE)) {
2438                 dev_err(&oct->pci_dev->dev, "Invalid MTU: %d\n", new_mtu);
2439                 dev_err(&oct->pci_dev->dev, "Valid range %d and %d\n",
2440                         LIO_MIN_MTU_SIZE, LIO_MAX_MTU_SIZE);
2441                 return -EINVAL;
2442         }
2443
2444         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
2445
2446         nctrl.ncmd.u64 = 0;
2447         nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MTU;
2448         nctrl.ncmd.s.param1 = new_mtu;
2449         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
2450         nctrl.wait_time = 100;
2451         nctrl.netpndev = (u64)netdev;
2452         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
2453
2454         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
2455         if (ret < 0) {
2456                 dev_err(&oct->pci_dev->dev, "Failed to set MTU\n");
2457                 return -1;
2458         }
2459
2460         lio->mtu = new_mtu;
2461
2462         return 0;
2463 }
2464
2465 /**
2466  * \brief Handler for SIOCSHWTSTAMP ioctl
2467  * @param netdev network device
2468  * @param ifr interface request
2469  * @param cmd command
2470  */
2471 static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
2472 {
2473         struct hwtstamp_config conf;
2474         struct lio *lio = GET_LIO(netdev);
2475
2476         if (copy_from_user(&conf, ifr->ifr_data, sizeof(conf)))
2477                 return -EFAULT;
2478
2479         if (conf.flags)
2480                 return -EINVAL;
2481
2482         switch (conf.tx_type) {
2483         case HWTSTAMP_TX_ON:
2484         case HWTSTAMP_TX_OFF:
2485                 break;
2486         default:
2487                 return -ERANGE;
2488         }
2489
2490         switch (conf.rx_filter) {
2491         case HWTSTAMP_FILTER_NONE:
2492                 break;
2493         case HWTSTAMP_FILTER_ALL:
2494         case HWTSTAMP_FILTER_SOME:
2495         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
2496         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
2497         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
2498         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
2499         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
2500         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
2501         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
2502         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
2503         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
2504         case HWTSTAMP_FILTER_PTP_V2_EVENT:
2505         case HWTSTAMP_FILTER_PTP_V2_SYNC:
2506         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
2507                 conf.rx_filter = HWTSTAMP_FILTER_ALL;
2508                 break;
2509         default:
2510                 return -ERANGE;
2511         }
2512
2513         if (conf.rx_filter == HWTSTAMP_FILTER_ALL)
2514                 ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
2515
2516         else
2517                 ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
2518
2519         return copy_to_user(ifr->ifr_data, &conf, sizeof(conf)) ? -EFAULT : 0;
2520 }
2521
2522 /**
2523  * \brief ioctl handler
2524  * @param netdev network device
2525  * @param ifr interface request
2526  * @param cmd command
2527  */
2528 static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2529 {
2530         switch (cmd) {
2531         case SIOCSHWTSTAMP:
2532                 return hwtstamp_ioctl(netdev, ifr);
2533         default:
2534                 return -EOPNOTSUPP;
2535         }
2536 }
2537
2538 /**
2539  * \brief handle a Tx timestamp response
2540  * @param status response status
2541  * @param buf pointer to skb
2542  */
2543 static void handle_timestamp(struct octeon_device *oct,
2544                              u32 status,
2545                              void *buf)
2546 {
2547         struct octnet_buf_free_info *finfo;
2548         struct octeon_soft_command *sc;
2549         struct oct_timestamp_resp *resp;
2550         struct lio *lio;
2551         struct sk_buff *skb = (struct sk_buff *)buf;
2552
2553         finfo = (struct octnet_buf_free_info *)skb->cb;
2554         lio = finfo->lio;
2555         sc = finfo->sc;
2556         oct = lio->oct_dev;
2557         resp = (struct oct_timestamp_resp *)sc->virtrptr;
2558
2559         if (status != OCTEON_REQUEST_DONE) {
2560                 dev_err(&oct->pci_dev->dev, "Tx timestamp instruction failed. Status: %llx\n",
2561                         CVM_CAST64(status));
2562                 resp->timestamp = 0;
2563         }
2564
2565         octeon_swap_8B_data(&resp->timestamp, 1);
2566
2567         if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS) != 0)) {
2568                 struct skb_shared_hwtstamps ts;
2569                 u64 ns = resp->timestamp;
2570
2571                 netif_info(lio, tx_done, lio->netdev,
2572                            "Got resulting SKBTX_HW_TSTAMP skb=%p ns=%016llu\n",
2573                            skb, (unsigned long long)ns);
2574                 ts.hwtstamp = ns_to_ktime(ns + lio->ptp_adjust);
2575                 skb_tstamp_tx(skb, &ts);
2576         }
2577
2578         octeon_free_soft_command(oct, sc);
2579         tx_buffer_free(skb);
2580 }
2581
2582 /* \brief Send a data packet that will be timestamped
2583  * @param oct octeon device
2584  * @param ndata pointer to network data
2585  * @param finfo pointer to private network data
2586  */
2587 static inline int send_nic_timestamp_pkt(struct octeon_device *oct,
2588                                          struct octnic_data_pkt *ndata,
2589                                          struct octnet_buf_free_info *finfo)
2590 {
2591         int retval;
2592         struct octeon_soft_command *sc;
2593         struct lio *lio;
2594         int ring_doorbell;
2595         u32 len;
2596
2597         lio = finfo->lio;
2598
2599         sc = octeon_alloc_soft_command_resp(oct, &ndata->cmd,
2600                                             sizeof(struct oct_timestamp_resp));
2601         finfo->sc = sc;
2602
2603         if (!sc) {
2604                 dev_err(&oct->pci_dev->dev, "No memory for timestamped data packet\n");
2605                 return IQ_SEND_FAILED;
2606         }
2607
2608         if (ndata->reqtype == REQTYPE_NORESP_NET)
2609                 ndata->reqtype = REQTYPE_RESP_NET;
2610         else if (ndata->reqtype == REQTYPE_NORESP_NET_SG)
2611                 ndata->reqtype = REQTYPE_RESP_NET_SG;
2612
2613         sc->callback = handle_timestamp;
2614         sc->callback_arg = finfo->skb;
2615         sc->iq_no = ndata->q_no;
2616
2617         len = (u32)((struct octeon_instr_ih2 *)(&sc->cmd.cmd2.ih2))->dlengsz;
2618
2619         ring_doorbell = 1;
2620         retval = octeon_send_command(oct, sc->iq_no, ring_doorbell, &sc->cmd,
2621                                      sc, len, ndata->reqtype);
2622
2623         if (retval == IQ_SEND_FAILED) {
2624                 dev_err(&oct->pci_dev->dev, "timestamp data packet failed status: %x\n",
2625                         retval);
2626                 octeon_free_soft_command(oct, sc);
2627         } else {
2628                 netif_info(lio, tx_queued, lio->netdev, "Queued timestamp packet\n");
2629         }
2630
2631         return retval;
2632 }
2633
2634 /** \brief Transmit networks packets to the Octeon interface
2635  * @param skbuff   skbuff struct to be passed to network layer.
2636  * @param netdev    pointer to network device
2637  * @returns whether the packet was transmitted to the device okay or not
2638  *             (NETDEV_TX_OK or NETDEV_TX_BUSY)
2639  */
2640 static int liquidio_xmit(struct sk_buff *skb, struct net_device *netdev)
2641 {
2642         struct lio *lio;
2643         struct octnet_buf_free_info *finfo;
2644         union octnic_cmd_setup cmdsetup;
2645         struct octnic_data_pkt ndata;
2646         struct octeon_device *oct;
2647         struct oct_iq_stats *stats;
2648         struct octeon_instr_irh *irh;
2649         union tx_info *tx_info;
2650         int status = 0;
2651         int q_idx = 0, iq_no = 0;
2652         int j;
2653         u64 dptr = 0;
2654         u32 tag = 0;
2655
2656         lio = GET_LIO(netdev);
2657         oct = lio->oct_dev;
2658
2659         if (netif_is_multiqueue(netdev)) {
2660                 q_idx = skb->queue_mapping;
2661                 q_idx = (q_idx % (lio->linfo.num_txpciq));
2662                 tag = q_idx;
2663                 iq_no = lio->linfo.txpciq[q_idx].s.q_no;
2664         } else {
2665                 iq_no = lio->txq;
2666         }
2667
2668         stats = &oct->instr_queue[iq_no]->stats;
2669
2670         /* Check for all conditions in which the current packet cannot be
2671          * transmitted.
2672          */
2673         if (!(atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING) ||
2674             (!lio->linfo.link.s.link_up) ||
2675             (skb->len <= 0)) {
2676                 netif_info(lio, tx_err, lio->netdev,
2677                            "Transmit failed link_status : %d\n",
2678                            lio->linfo.link.s.link_up);
2679                 goto lio_xmit_failed;
2680         }
2681
2682         /* Use space in skb->cb to store info used to unmap and
2683          * free the buffers.
2684          */
2685         finfo = (struct octnet_buf_free_info *)skb->cb;
2686         finfo->lio = lio;
2687         finfo->skb = skb;
2688         finfo->sc = NULL;
2689
2690         /* Prepare the attributes for the data to be passed to OSI. */
2691         memset(&ndata, 0, sizeof(struct octnic_data_pkt));
2692
2693         ndata.buf = (void *)finfo;
2694
2695         ndata.q_no = iq_no;
2696
2697         if (netif_is_multiqueue(netdev)) {
2698                 if (octnet_iq_is_full(oct, ndata.q_no)) {
2699                         /* defer sending if queue is full */
2700                         netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
2701                                    ndata.q_no);
2702                         stats->tx_iq_busy++;
2703                         return NETDEV_TX_BUSY;
2704                 }
2705         } else {
2706                 if (octnet_iq_is_full(oct, lio->txq)) {
2707                         /* defer sending if queue is full */
2708                         stats->tx_iq_busy++;
2709                         netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
2710                                    lio->txq);
2711                         return NETDEV_TX_BUSY;
2712                 }
2713         }
2714         /* pr_info(" XMIT - valid Qs: %d, 1st Q no: %d, cpu:  %d, q_no:%d\n",
2715          *      lio->linfo.num_txpciq, lio->txq, cpu, ndata.q_no);
2716          */
2717
2718         ndata.datasize = skb->len;
2719
2720         cmdsetup.u64 = 0;
2721         cmdsetup.s.iq_no = iq_no;
2722
2723         if (skb->ip_summed == CHECKSUM_PARTIAL) {
2724                 if (skb->encapsulation) {
2725                         cmdsetup.s.tnl_csum = 1;
2726                         stats->tx_vxlan++;
2727                 } else {
2728                         cmdsetup.s.transport_csum = 1;
2729                 }
2730         }
2731         if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
2732                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
2733                 cmdsetup.s.timestamp = 1;
2734         }
2735
2736         if (skb_shinfo(skb)->nr_frags == 0) {
2737                 cmdsetup.s.u.datasize = skb->len;
2738                 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
2739
2740                 /* Offload checksum calculation for TCP/UDP packets */
2741                 dptr = dma_map_single(&oct->pci_dev->dev,
2742                                       skb->data,
2743                                       skb->len,
2744                                       DMA_TO_DEVICE);
2745                 if (dma_mapping_error(&oct->pci_dev->dev, dptr)) {
2746                         dev_err(&oct->pci_dev->dev, "%s DMA mapping error 1\n",
2747                                 __func__);
2748                         return NETDEV_TX_BUSY;
2749                 }
2750
2751                 ndata.cmd.cmd2.dptr = dptr;
2752                 finfo->dptr = dptr;
2753                 ndata.reqtype = REQTYPE_NORESP_NET;
2754
2755         } else {
2756                 int i, frags;
2757                 struct skb_frag_struct *frag;
2758                 struct octnic_gather *g;
2759
2760                 spin_lock(&lio->glist_lock[q_idx]);
2761                 g = (struct octnic_gather *)
2762                         list_delete_head(&lio->glist[q_idx]);
2763                 spin_unlock(&lio->glist_lock[q_idx]);
2764
2765                 if (!g) {
2766                         netif_info(lio, tx_err, lio->netdev,
2767                                    "Transmit scatter gather: glist null!\n");
2768                         goto lio_xmit_failed;
2769                 }
2770
2771                 cmdsetup.s.gather = 1;
2772                 cmdsetup.s.u.gatherptrs = (skb_shinfo(skb)->nr_frags + 1);
2773                 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
2774
2775                 memset(g->sg, 0, g->sg_size);
2776
2777                 g->sg[0].ptr[0] = dma_map_single(&oct->pci_dev->dev,
2778                                                  skb->data,
2779                                                  (skb->len - skb->data_len),
2780                                                  DMA_TO_DEVICE);
2781                 if (dma_mapping_error(&oct->pci_dev->dev, g->sg[0].ptr[0])) {
2782                         dev_err(&oct->pci_dev->dev, "%s DMA mapping error 2\n",
2783                                 __func__);
2784                         return NETDEV_TX_BUSY;
2785                 }
2786                 add_sg_size(&g->sg[0], (skb->len - skb->data_len), 0);
2787
2788                 frags = skb_shinfo(skb)->nr_frags;
2789                 i = 1;
2790                 while (frags--) {
2791                         frag = &skb_shinfo(skb)->frags[i - 1];
2792
2793                         g->sg[(i >> 2)].ptr[(i & 3)] =
2794                                 dma_map_page(&oct->pci_dev->dev,
2795                                              frag->page.p,
2796                                              frag->page_offset,
2797                                              frag->size,
2798                                              DMA_TO_DEVICE);
2799
2800                         if (dma_mapping_error(&oct->pci_dev->dev,
2801                                               g->sg[i >> 2].ptr[i & 3])) {
2802                                 dma_unmap_single(&oct->pci_dev->dev,
2803                                                  g->sg[0].ptr[0],
2804                                                  skb->len - skb->data_len,
2805                                                  DMA_TO_DEVICE);
2806                                 for (j = 1; j < i; j++) {
2807                                         frag = &skb_shinfo(skb)->frags[j - 1];
2808                                         dma_unmap_page(&oct->pci_dev->dev,
2809                                                        g->sg[j >> 2].ptr[j & 3],
2810                                                        frag->size,
2811                                                        DMA_TO_DEVICE);
2812                                 }
2813                                 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 3\n",
2814                                         __func__);
2815                                 return NETDEV_TX_BUSY;
2816                         }
2817
2818                         add_sg_size(&g->sg[(i >> 2)], frag->size, (i & 3));
2819                         i++;
2820                 }
2821
2822                 dma_sync_single_for_device(&oct->pci_dev->dev, g->sg_dma_ptr,
2823                                            g->sg_size, DMA_TO_DEVICE);
2824                 dptr = g->sg_dma_ptr;
2825
2826                 ndata.cmd.cmd2.dptr = dptr;
2827                 finfo->dptr = dptr;
2828                 finfo->g = g;
2829
2830                 ndata.reqtype = REQTYPE_NORESP_NET_SG;
2831         }
2832
2833         irh = (struct octeon_instr_irh *)&ndata.cmd.cmd2.irh;
2834         tx_info = (union tx_info *)&ndata.cmd.cmd2.ossp[0];
2835
2836         if (skb_shinfo(skb)->gso_size) {
2837                 tx_info->s.gso_size = skb_shinfo(skb)->gso_size;
2838                 tx_info->s.gso_segs = skb_shinfo(skb)->gso_segs;
2839                 stats->tx_gso++;
2840         }
2841
2842         /* HW insert VLAN tag */
2843         if (skb_vlan_tag_present(skb)) {
2844                 irh->priority = skb_vlan_tag_get(skb) >> 13;
2845                 irh->vlan = skb_vlan_tag_get(skb) & 0xfff;
2846         }
2847
2848         if (unlikely(cmdsetup.s.timestamp))
2849                 status = send_nic_timestamp_pkt(oct, &ndata, finfo);
2850         else
2851                 status = octnet_send_nic_data_pkt(oct, &ndata);
2852         if (status == IQ_SEND_FAILED)
2853                 goto lio_xmit_failed;
2854
2855         netif_info(lio, tx_queued, lio->netdev, "Transmit queued successfully\n");
2856
2857         if (status == IQ_SEND_STOP)
2858                 stop_q(lio->netdev, q_idx);
2859
2860         netif_trans_update(netdev);
2861
2862         if (skb_shinfo(skb)->gso_size)
2863                 stats->tx_done += skb_shinfo(skb)->gso_segs;
2864         else
2865                 stats->tx_done++;
2866         stats->tx_tot_bytes += skb->len;
2867
2868         return NETDEV_TX_OK;
2869
2870 lio_xmit_failed:
2871         stats->tx_dropped++;
2872         netif_info(lio, tx_err, lio->netdev, "IQ%d Transmit dropped:%llu\n",
2873                    iq_no, stats->tx_dropped);
2874         if (dptr)
2875                 dma_unmap_single(&oct->pci_dev->dev, dptr,
2876                                  ndata.datasize, DMA_TO_DEVICE);
2877         tx_buffer_free(skb);
2878         return NETDEV_TX_OK;
2879 }
2880
2881 /** \brief Network device Tx timeout
2882  * @param netdev    pointer to network device
2883  */
2884 static void liquidio_tx_timeout(struct net_device *netdev)
2885 {
2886         struct lio *lio;
2887
2888         lio = GET_LIO(netdev);
2889
2890         netif_info(lio, tx_err, lio->netdev,
2891                    "Transmit timeout tx_dropped:%ld, waking up queues now!!\n",
2892                    netdev->stats.tx_dropped);
2893         netif_trans_update(netdev);
2894         txqs_wake(netdev);
2895 }
2896
2897 static int liquidio_vlan_rx_add_vid(struct net_device *netdev,
2898                                     __be16 proto __attribute__((unused)),
2899                                     u16 vid)
2900 {
2901         struct lio *lio = GET_LIO(netdev);
2902         struct octeon_device *oct = lio->oct_dev;
2903         struct octnic_ctrl_pkt nctrl;
2904         int ret = 0;
2905
2906         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
2907
2908         nctrl.ncmd.u64 = 0;
2909         nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
2910         nctrl.ncmd.s.param1 = vid;
2911         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
2912         nctrl.wait_time = 100;
2913         nctrl.netpndev = (u64)netdev;
2914         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
2915
2916         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
2917         if (ret < 0) {
2918                 dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
2919                         ret);
2920         }
2921
2922         return ret;
2923 }
2924
2925 static int liquidio_vlan_rx_kill_vid(struct net_device *netdev,
2926                                      __be16 proto __attribute__((unused)),
2927                                      u16 vid)
2928 {
2929         struct lio *lio = GET_LIO(netdev);
2930         struct octeon_device *oct = lio->oct_dev;
2931         struct octnic_ctrl_pkt nctrl;
2932         int ret = 0;
2933
2934         memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
2935
2936         nctrl.ncmd.u64 = 0;
2937         nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;
2938         nctrl.ncmd.s.param1 = vid;
2939         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
2940         nctrl.wait_time = 100;
2941         nctrl.netpndev = (u64)netdev;
2942         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
2943
2944         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
2945         if (ret < 0) {
2946                 dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
2947                         ret);
2948         }
2949         return ret;
2950 }
2951
2952 /** Sending command to enable/disable RX checksum offload
2953  * @param netdev                pointer to network device
2954  * @param command               OCTNET_CMD_TNL_RX_CSUM_CTL
2955  * @param rx_cmd_bit            OCTNET_CMD_RXCSUM_ENABLE/
2956  *                              OCTNET_CMD_RXCSUM_DISABLE
2957  * @returns                     SUCCESS or FAILURE
2958  */
2959 static int liquidio_set_rxcsum_command(struct net_device *netdev, int command,
2960                                        u8 rx_cmd)
2961 {
2962         struct lio *lio = GET_LIO(netdev);
2963         struct octeon_device *oct = lio->oct_dev;
2964         struct octnic_ctrl_pkt nctrl;
2965         int ret = 0;
2966
2967         nctrl.ncmd.u64 = 0;
2968         nctrl.ncmd.s.cmd = command;
2969         nctrl.ncmd.s.param1 = rx_cmd;
2970         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
2971         nctrl.wait_time = 100;
2972         nctrl.netpndev = (u64)netdev;
2973         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
2974
2975         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
2976         if (ret < 0) {
2977                 dev_err(&oct->pci_dev->dev,
2978                         "DEVFLAGS RXCSUM change failed in core(ret:0x%x)\n",
2979                         ret);
2980         }
2981         return ret;
2982 }
2983
2984 /** Sending command to add/delete VxLAN UDP port to firmware
2985  * @param netdev                pointer to network device
2986  * @param command               OCTNET_CMD_VXLAN_PORT_CONFIG
2987  * @param vxlan_port            VxLAN port to be added or deleted
2988  * @param vxlan_cmd_bit         OCTNET_CMD_VXLAN_PORT_ADD,
2989  *                              OCTNET_CMD_VXLAN_PORT_DEL
2990  * @returns                     SUCCESS or FAILURE
2991  */
2992 static int liquidio_vxlan_port_command(struct net_device *netdev, int command,
2993                                        u16 vxlan_port, u8 vxlan_cmd_bit)
2994 {
2995         struct lio *lio = GET_LIO(netdev);
2996         struct octeon_device *oct = lio->oct_dev;
2997         struct octnic_ctrl_pkt nctrl;
2998         int ret = 0;
2999
3000         nctrl.ncmd.u64 = 0;
3001         nctrl.ncmd.s.cmd = command;
3002         nctrl.ncmd.s.more = vxlan_cmd_bit;
3003         nctrl.ncmd.s.param1 = vxlan_port;
3004         nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
3005         nctrl.wait_time = 100;
3006         nctrl.netpndev = (u64)netdev;
3007         nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
3008
3009         ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
3010         if (ret < 0) {
3011                 dev_err(&oct->pci_dev->dev,
3012                         "VxLAN port add/delete failed in core (ret:0x%x)\n",
3013                         ret);
3014         }
3015         return ret;
3016 }
3017
3018 /** \brief Net device fix features
3019  * @param netdev  pointer to network device
3020  * @param request features requested
3021  * @returns updated features list
3022  */
3023 static netdev_features_t liquidio_fix_features(struct net_device *netdev,
3024                                                netdev_features_t request)
3025 {
3026         struct lio *lio = netdev_priv(netdev);
3027
3028         if ((request & NETIF_F_RXCSUM) &&
3029             !(lio->dev_capability & NETIF_F_RXCSUM))
3030                 request &= ~NETIF_F_RXCSUM;
3031
3032         if ((request & NETIF_F_HW_CSUM) &&
3033             !(lio->dev_capability & NETIF_F_HW_CSUM))
3034                 request &= ~NETIF_F_HW_CSUM;
3035
3036         if ((request & NETIF_F_TSO) && !(lio->dev_capability & NETIF_F_TSO))
3037                 request &= ~NETIF_F_TSO;
3038
3039         if ((request & NETIF_F_TSO6) && !(lio->dev_capability & NETIF_F_TSO6))
3040                 request &= ~NETIF_F_TSO6;
3041
3042         if ((request & NETIF_F_LRO) && !(lio->dev_capability & NETIF_F_LRO))
3043                 request &= ~NETIF_F_LRO;
3044
3045         /*Disable LRO if RXCSUM is off */
3046         if (!(request & NETIF_F_RXCSUM) && (netdev->features & NETIF_F_LRO) &&
3047             (lio->dev_capability & NETIF_F_LRO))
3048                 request &= ~NETIF_F_LRO;
3049
3050         return request;
3051 }
3052
3053 /** \brief Net device set features
3054  * @param netdev  pointer to network device
3055  * @param features features to enable/disable
3056  */
3057 static int liquidio_set_features(struct net_device *netdev,
3058                                  netdev_features_t features)
3059 {
3060         struct lio *lio = netdev_priv(netdev);
3061
3062         if (!((netdev->features ^ features) & NETIF_F_LRO))
3063                 return 0;
3064
3065         if ((features & NETIF_F_LRO) && (lio->dev_capability & NETIF_F_LRO))
3066                 liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
3067                                      OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
3068         else if (!(features & NETIF_F_LRO) &&
3069                  (lio->dev_capability & NETIF_F_LRO))
3070                 liquidio_set_feature(netdev, OCTNET_CMD_LRO_DISABLE,
3071                                      OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
3072
3073         /* Sending command to firmware to enable/disable RX checksum
3074          * offload settings using ethtool
3075          */
3076         if (!(netdev->features & NETIF_F_RXCSUM) &&
3077             (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
3078             (features & NETIF_F_RXCSUM))
3079                 liquidio_set_rxcsum_command(netdev,
3080                                             OCTNET_CMD_TNL_RX_CSUM_CTL,
3081                                             OCTNET_CMD_RXCSUM_ENABLE);
3082         else if ((netdev->features & NETIF_F_RXCSUM) &&
3083                  (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
3084                  !(features & NETIF_F_RXCSUM))
3085                 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
3086                                             OCTNET_CMD_RXCSUM_DISABLE);
3087
3088         return 0;
3089 }
3090
3091 static void liquidio_add_vxlan_port(struct net_device *netdev,
3092                                     struct udp_tunnel_info *ti)
3093 {
3094         if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
3095                 return;
3096
3097         liquidio_vxlan_port_command(netdev,
3098                                     OCTNET_CMD_VXLAN_PORT_CONFIG,
3099                                     htons(ti->port),
3100                                     OCTNET_CMD_VXLAN_PORT_ADD);
3101 }
3102
3103 static void liquidio_del_vxlan_port(struct net_device *netdev,
3104                                     struct udp_tunnel_info *ti)
3105 {
3106         if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
3107                 return;
3108
3109         liquidio_vxlan_port_command(netdev,
3110                                     OCTNET_CMD_VXLAN_PORT_CONFIG,
3111                                     htons(ti->port),
3112                                     OCTNET_CMD_VXLAN_PORT_DEL);
3113 }
3114
3115 static struct net_device_ops lionetdevops = {
3116         .ndo_open               = liquidio_open,
3117         .ndo_stop               = liquidio_stop,
3118         .ndo_start_xmit         = liquidio_xmit,
3119         .ndo_get_stats          = liquidio_get_stats,
3120         .ndo_set_mac_address    = liquidio_set_mac,
3121         .ndo_set_rx_mode        = liquidio_set_mcast_list,
3122         .ndo_tx_timeout         = liquidio_tx_timeout,
3123
3124         .ndo_vlan_rx_add_vid    = liquidio_vlan_rx_add_vid,
3125         .ndo_vlan_rx_kill_vid   = liquidio_vlan_rx_kill_vid,
3126         .ndo_change_mtu         = liquidio_change_mtu,
3127         .ndo_do_ioctl           = liquidio_ioctl,
3128         .ndo_fix_features       = liquidio_fix_features,
3129         .ndo_set_features       = liquidio_set_features,
3130         .ndo_udp_tunnel_add     = liquidio_add_vxlan_port,
3131         .ndo_udp_tunnel_del     = liquidio_del_vxlan_port,
3132 };
3133
3134 /** \brief Entry point for the liquidio module
3135  */
3136 static int __init liquidio_init(void)
3137 {
3138         int i;
3139         struct handshake *hs;
3140
3141         init_completion(&first_stage);
3142
3143         octeon_init_device_list(conf_type);
3144
3145         if (liquidio_init_pci())
3146                 return -EINVAL;
3147
3148         wait_for_completion_timeout(&first_stage, msecs_to_jiffies(1000));
3149
3150         for (i = 0; i < MAX_OCTEON_DEVICES; i++) {
3151                 hs = &handshake[i];
3152                 if (hs->pci_dev) {
3153                         wait_for_completion(&hs->init);
3154                         if (!hs->init_ok) {
3155                                 /* init handshake failed */
3156                                 dev_err(&hs->pci_dev->dev,
3157                                         "Failed to init device\n");
3158                                 liquidio_deinit_pci();
3159                                 return -EIO;
3160                         }
3161                 }
3162         }
3163
3164         for (i = 0; i < MAX_OCTEON_DEVICES; i++) {
3165                 hs = &handshake[i];
3166                 if (hs->pci_dev) {
3167                         wait_for_completion_timeout(&hs->started,
3168                                                     msecs_to_jiffies(30000));
3169                         if (!hs->started_ok) {
3170                                 /* starter handshake failed */
3171                                 dev_err(&hs->pci_dev->dev,
3172                                         "Firmware failed to start\n");
3173                                 liquidio_deinit_pci();
3174                                 return -EIO;
3175                         }
3176                 }
3177         }
3178
3179         return 0;
3180 }
3181
3182 static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
3183 {
3184         struct octeon_device *oct = (struct octeon_device *)buf;
3185         struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
3186         int gmxport = 0;
3187         union oct_link_status *ls;
3188         int i;
3189
3190         if (recv_pkt->buffer_size[0] != sizeof(*ls)) {
3191                 dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
3192                         recv_pkt->buffer_size[0],
3193                         recv_pkt->rh.r_nic_info.gmxport);
3194                 goto nic_info_err;
3195         }
3196
3197         gmxport = recv_pkt->rh.r_nic_info.gmxport;
3198         ls = (union oct_link_status *)get_rbd(recv_pkt->buffer_ptr[0]);
3199
3200         octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
3201         for (i = 0; i < oct->ifcount; i++) {
3202                 if (oct->props[i].gmxport == gmxport) {
3203                         update_link_status(oct->props[i].netdev, ls);
3204                         break;
3205                 }
3206         }
3207
3208 nic_info_err:
3209         for (i = 0; i < recv_pkt->buffer_count; i++)
3210                 recv_buffer_free(recv_pkt->buffer_ptr[i]);
3211         octeon_free_recv_info(recv_info);
3212         return 0;
3213 }
3214
3215 /**
3216  * \brief Setup network interfaces
3217  * @param octeon_dev  octeon device
3218  *
3219  * Called during init time for each device. It assumes the NIC
3220  * is already up and running.  The link information for each
3221  * interface is passed in link_info.
3222  */
3223 static int setup_nic_devices(struct octeon_device *octeon_dev)
3224 {
3225         struct lio *lio = NULL;
3226         struct net_device *netdev;
3227         u8 mac[6], i, j;
3228         struct octeon_soft_command *sc;
3229         struct liquidio_if_cfg_context *ctx;
3230         struct liquidio_if_cfg_resp *resp;
3231         struct octdev_props *props;
3232         int retval, num_iqueues, num_oqueues;
3233         union oct_nic_if_cfg if_cfg;
3234         unsigned int base_queue;
3235         unsigned int gmx_port_id;
3236         u32 resp_size, ctx_size, data_size;
3237         u32 ifidx_or_pfnum;
3238         struct lio_version *vdata;
3239
3240         /* This is to handle link status changes */
3241         octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC,
3242                                     OPCODE_NIC_INFO,
3243                                     lio_nic_info, octeon_dev);
3244
3245         /* REQTYPE_RESP_NET and REQTYPE_SOFT_COMMAND do not have free functions.
3246          * They are handled directly.
3247          */
3248         octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET,
3249                                         free_netbuf);
3250
3251         octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET_SG,
3252                                         free_netsgbuf);
3253
3254         octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_RESP_NET_SG,
3255                                         free_netsgbuf_with_resp);
3256
3257         for (i = 0; i < octeon_dev->ifcount; i++) {
3258                 resp_size = sizeof(struct liquidio_if_cfg_resp);
3259                 ctx_size = sizeof(struct liquidio_if_cfg_context);
3260                 data_size = sizeof(struct lio_version);
3261                 sc = (struct octeon_soft_command *)
3262                         octeon_alloc_soft_command(octeon_dev, data_size,
3263                                                   resp_size, ctx_size);
3264                 resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
3265                 ctx  = (struct liquidio_if_cfg_context *)sc->ctxptr;
3266                 vdata = (struct lio_version *)sc->virtdptr;
3267
3268                 *((u64 *)vdata) = 0;
3269                 vdata->major = cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
3270                 vdata->minor = cpu_to_be16(LIQUIDIO_BASE_MINOR_VERSION);
3271                 vdata->micro = cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);
3272
3273                 if (OCTEON_CN23XX_PF(octeon_dev)) {
3274                         num_iqueues = octeon_dev->sriov_info.num_pf_rings;
3275                         num_oqueues = octeon_dev->sriov_info.num_pf_rings;
3276                         base_queue = octeon_dev->sriov_info.pf_srn;
3277
3278                         gmx_port_id = octeon_dev->pf_num;
3279                         ifidx_or_pfnum = octeon_dev->pf_num;
3280                 } else {
3281                         num_iqueues = CFG_GET_NUM_TXQS_NIC_IF(
3282                                                 octeon_get_conf(octeon_dev), i);
3283                         num_oqueues = CFG_GET_NUM_RXQS_NIC_IF(
3284                                                 octeon_get_conf(octeon_dev), i);
3285                         base_queue = CFG_GET_BASE_QUE_NIC_IF(
3286                                                 octeon_get_conf(octeon_dev), i);
3287                         gmx_port_id = CFG_GET_GMXID_NIC_IF(
3288                                                 octeon_get_conf(octeon_dev), i);
3289                         ifidx_or_pfnum = i;
3290                 }
3291
3292                 dev_dbg(&octeon_dev->pci_dev->dev,
3293                         "requesting config for interface %d, iqs %d, oqs %d\n",
3294                         ifidx_or_pfnum, num_iqueues, num_oqueues);
3295                 WRITE_ONCE(ctx->cond, 0);
3296                 ctx->octeon_id = lio_get_device_id(octeon_dev);
3297                 init_waitqueue_head(&ctx->wc);
3298
3299                 if_cfg.u64 = 0;
3300                 if_cfg.s.num_iqueues = num_iqueues;
3301                 if_cfg.s.num_oqueues = num_oqueues;
3302                 if_cfg.s.base_queue = base_queue;
3303                 if_cfg.s.gmx_port_id = gmx_port_id;
3304
3305                 sc->iq_no = 0;
3306
3307                 octeon_prepare_soft_command(octeon_dev, sc, OPCODE_NIC,
3308                                             OPCODE_NIC_IF_CFG, 0,
3309                                             if_cfg.u64, 0);
3310
3311                 sc->callback = if_cfg_callback;
3312                 sc->callback_arg = sc;
3313                 sc->wait_time = 3000;
3314
3315                 retval = octeon_send_soft_command(octeon_dev, sc);
3316                 if (retval == IQ_SEND_FAILED) {
3317                         dev_err(&octeon_dev->pci_dev->dev,
3318                                 "iq/oq config failed status: %x\n",
3319                                 retval);
3320                         /* Soft instr is freed by driver in case of failure. */
3321                         goto setup_nic_dev_fail;
3322                 }
3323
3324                 /* Sleep on a wait queue till the cond flag indicates that the
3325                  * response arrived or timed-out.
3326                  */
3327                 sleep_cond(&ctx->wc, &ctx->cond);
3328                 retval = resp->status;
3329                 if (retval) {
3330                         dev_err(&octeon_dev->pci_dev->dev, "iq/oq config failed\n");
3331                         goto setup_nic_dev_fail;
3332                 }
3333
3334                 octeon_swap_8B_data((u64 *)(&resp->cfg_info),
3335                                     (sizeof(struct liquidio_if_cfg_info)) >> 3);
3336
3337                 num_iqueues = hweight64(resp->cfg_info.iqmask);
3338                 num_oqueues = hweight64(resp->cfg_info.oqmask);
3339
3340                 if (!(num_iqueues) || !(num_oqueues)) {
3341                         dev_err(&octeon_dev->pci_dev->dev,
3342                                 "Got bad iqueues (%016llx) or oqueues (%016llx) from firmware.\n",
3343                                 resp->cfg_info.iqmask,
3344                                 resp->cfg_info.oqmask);
3345                         goto setup_nic_dev_fail;
3346                 }
3347                 dev_dbg(&octeon_dev->pci_dev->dev,
3348                         "interface %d, iqmask %016llx, oqmask %016llx, numiqueues %d, numoqueues %d\n",
3349                         i, resp->cfg_info.iqmask, resp->cfg_info.oqmask,
3350                         num_iqueues, num_oqueues);
3351                 netdev = alloc_etherdev_mq(LIO_SIZE, num_iqueues);
3352
3353                 if (!netdev) {
3354                         dev_err(&octeon_dev->pci_dev->dev, "Device allocation failed\n");
3355                         goto setup_nic_dev_fail;
3356                 }
3357
3358                 SET_NETDEV_DEV(netdev, &octeon_dev->pci_dev->dev);
3359
3360                 if (num_iqueues > 1)
3361                         lionetdevops.ndo_select_queue = select_q;
3362
3363                 /* Associate the routines that will handle different
3364                  * netdev tasks.
3365                  */
3366                 netdev->netdev_ops = &lionetdevops;
3367
3368                 lio = GET_LIO(netdev);
3369
3370                 memset(lio, 0, sizeof(struct lio));
3371
3372                 lio->ifidx = ifidx_or_pfnum;
3373
3374                 props = &octeon_dev->props[i];
3375                 props->gmxport = resp->cfg_info.linfo.gmxport;
3376                 props->netdev = netdev;
3377
3378                 lio->linfo.num_rxpciq = num_oqueues;
3379                 lio->linfo.num_txpciq = num_iqueues;
3380                 for (j = 0; j < num_oqueues; j++) {
3381                         lio->linfo.rxpciq[j].u64 =
3382                                 resp->cfg_info.linfo.rxpciq[j].u64;
3383                 }
3384                 for (j = 0; j < num_iqueues; j++) {
3385                         lio->linfo.txpciq[j].u64 =
3386                                 resp->cfg_info.linfo.txpciq[j].u64;
3387                 }
3388                 lio->linfo.hw_addr = resp->cfg_info.linfo.hw_addr;
3389                 lio->linfo.gmxport = resp->cfg_info.linfo.gmxport;
3390                 lio->linfo.link.u64 = resp->cfg_info.linfo.link.u64;
3391
3392                 lio->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3393
3394                 if (OCTEON_CN23XX_PF(octeon_dev) ||
3395                     OCTEON_CN6XXX(octeon_dev)) {
3396                         lio->dev_capability = NETIF_F_HIGHDMA
3397                                               | NETIF_F_IP_CSUM
3398                                               | NETIF_F_IPV6_CSUM
3399                                               | NETIF_F_SG | NETIF_F_RXCSUM
3400                                               | NETIF_F_GRO
3401                                               | NETIF_F_TSO | NETIF_F_TSO6
3402                                               | NETIF_F_LRO;
3403                 }
3404                 netif_set_gso_max_size(netdev, OCTNIC_GSO_MAX_SIZE);
3405
3406                 /*  Copy of transmit encapsulation capabilities:
3407                  *  TSO, TSO6, Checksums for this device
3408                  */
3409                 lio->enc_dev_capability = NETIF_F_IP_CSUM
3410                                           | NETIF_F_IPV6_CSUM
3411                                           | NETIF_F_GSO_UDP_TUNNEL
3412                                           | NETIF_F_HW_CSUM | NETIF_F_SG
3413                                           | NETIF_F_RXCSUM
3414                                           | NETIF_F_TSO | NETIF_F_TSO6
3415                                           | NETIF_F_LRO;
3416
3417                 netdev->hw_enc_features = (lio->enc_dev_capability &
3418                                            ~NETIF_F_LRO);
3419
3420                 lio->dev_capability |= NETIF_F_GSO_UDP_TUNNEL;
3421
3422                 netdev->vlan_features = lio->dev_capability;
3423                 /* Add any unchangeable hw features */
3424                 lio->dev_capability |=  NETIF_F_HW_VLAN_CTAG_FILTER |
3425                                         NETIF_F_HW_VLAN_CTAG_RX |
3426                                         NETIF_F_HW_VLAN_CTAG_TX;
3427
3428                 netdev->features = (lio->dev_capability & ~NETIF_F_LRO);
3429
3430                 netdev->hw_features = lio->dev_capability;
3431                 /*HW_VLAN_RX and HW_VLAN_FILTER is always on*/
3432                 netdev->hw_features = netdev->hw_features &
3433                         ~NETIF_F_HW_VLAN_CTAG_RX;
3434
3435                 /* Point to the  properties for octeon device to which this
3436                  * interface belongs.
3437                  */
3438                 lio->oct_dev = octeon_dev;
3439                 lio->octprops = props;
3440                 lio->netdev = netdev;
3441
3442                 dev_dbg(&octeon_dev->pci_dev->dev,
3443                         "if%d gmx: %d hw_addr: 0x%llx\n", i,
3444                         lio->linfo.gmxport, CVM_CAST64(lio->linfo.hw_addr));
3445
3446                 /* 64-bit swap required on LE machines */
3447                 octeon_swap_8B_data(&lio->linfo.hw_addr, 1);
3448                 for (j = 0; j < 6; j++)
3449                         mac[j] = *((u8 *)(((u8 *)&lio->linfo.hw_addr) + 2 + j));
3450
3451                 /* Copy MAC Address to OS network device structure */
3452
3453                 ether_addr_copy(netdev->dev_addr, mac);
3454
3455                 /* By default all interfaces on a single Octeon uses the same
3456                  * tx and rx queues
3457                  */
3458                 lio->txq = lio->linfo.txpciq[0].s.q_no;
3459                 lio->rxq = lio->linfo.rxpciq[0].s.q_no;
3460                 if (setup_io_queues(octeon_dev, i)) {
3461                         dev_err(&octeon_dev->pci_dev->dev, "I/O queues creation failed\n");
3462                         goto setup_nic_dev_fail;
3463                 }
3464
3465                 ifstate_set(lio, LIO_IFSTATE_DROQ_OPS);
3466
3467                 lio->tx_qsize = octeon_get_tx_qsize(octeon_dev, lio->txq);
3468                 lio->rx_qsize = octeon_get_rx_qsize(octeon_dev, lio->rxq);
3469
3470                 if (setup_glists(octeon_dev, lio, num_iqueues)) {
3471                         dev_err(&octeon_dev->pci_dev->dev,
3472                                 "Gather list allocation failed\n");
3473                         goto setup_nic_dev_fail;
3474                 }
3475
3476                 /* Register ethtool support */
3477                 liquidio_set_ethtool_ops(netdev);
3478                 octeon_dev->priv_flags = 0x0;
3479
3480                 if (netdev->features & NETIF_F_LRO)
3481                         liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
3482                                              OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
3483
3484                 liquidio_set_feature(netdev, OCTNET_CMD_ENABLE_VLAN_FILTER, 0);
3485
3486                 if ((debug != -1) && (debug & NETIF_MSG_HW))
3487                         liquidio_set_feature(netdev,
3488                                              OCTNET_CMD_VERBOSE_ENABLE, 0);
3489
3490                 /* Register the network device with the OS */
3491                 if (register_netdev(netdev)) {
3492                         dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
3493                         goto setup_nic_dev_fail;
3494                 }
3495
3496                 dev_dbg(&octeon_dev->pci_dev->dev,
3497                         "Setup NIC ifidx:%d mac:%02x%02x%02x%02x%02x%02x\n",
3498                         i, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
3499                 netif_carrier_off(netdev);
3500                 lio->link_changes++;
3501
3502                 ifstate_set(lio, LIO_IFSTATE_REGISTERED);
3503
3504                 /* Sending command to firmware to enable Rx checksum offload
3505                  * by default at the time of setup of Liquidio driver for
3506                  * this device
3507                  */
3508                 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
3509                                             OCTNET_CMD_RXCSUM_ENABLE);
3510                 liquidio_set_feature(netdev, OCTNET_CMD_TNL_TX_CSUM_CTL,
3511                                      OCTNET_CMD_TXCSUM_ENABLE);
3512
3513                 dev_dbg(&octeon_dev->pci_dev->dev,
3514                         "NIC ifidx:%d Setup successful\n", i);
3515
3516                 octeon_free_soft_command(octeon_dev, sc);
3517         }
3518
3519         return 0;
3520
3521 setup_nic_dev_fail:
3522
3523         octeon_free_soft_command(octeon_dev, sc);
3524
3525         while (i--) {
3526                 dev_err(&octeon_dev->pci_dev->dev,
3527                         "NIC ifidx:%d Setup failed\n", i);
3528                 liquidio_destroy_nic_device(octeon_dev, i);
3529         }
3530         return -ENODEV;
3531 }
3532
3533 /**
3534  * \brief initialize the NIC
3535  * @param oct octeon device
3536  *
3537  * This initialization routine is called once the Octeon device application is
3538  * up and running
3539  */
3540 static int liquidio_init_nic_module(struct octeon_device *oct)
3541 {
3542         struct oct_intrmod_cfg *intrmod_cfg;
3543         int i, retval = 0;
3544         int num_nic_ports = CFG_GET_NUM_NIC_PORTS(octeon_get_conf(oct));
3545
3546         dev_dbg(&oct->pci_dev->dev, "Initializing network interfaces\n");
3547
3548         /* only default iq and oq were initialized
3549          * initialize the rest as well
3550          */
3551         /* run port_config command for each port */
3552         oct->ifcount = num_nic_ports;
3553
3554         memset(oct->props, 0,
3555                sizeof(struct octdev_props) * num_nic_ports);
3556
3557         for (i = 0; i < MAX_OCTEON_LINKS; i++)
3558                 oct->props[i].gmxport = -1;
3559
3560         retval = setup_nic_devices(oct);
3561         if (retval) {
3562                 dev_err(&oct->pci_dev->dev, "Setup NIC devices failed\n");
3563                 goto octnet_init_failure;
3564         }
3565
3566         liquidio_ptp_init(oct);
3567
3568         /* Initialize interrupt moderation params */
3569         intrmod_cfg = &((struct octeon_device *)oct)->intrmod;
3570         intrmod_cfg->rx_enable = 1;
3571         intrmod_cfg->check_intrvl =   LIO_INTRMOD_CHECK_INTERVAL;
3572         intrmod_cfg->maxpkt_ratethr = LIO_INTRMOD_MAXPKT_RATETHR;
3573         intrmod_cfg->minpkt_ratethr = LIO_INTRMOD_MINPKT_RATETHR;
3574         intrmod_cfg->rx_maxcnt_trigger = LIO_INTRMOD_RXMAXCNT_TRIGGER;
3575         intrmod_cfg->rx_maxtmr_trigger = LIO_INTRMOD_RXMAXTMR_TRIGGER;
3576         intrmod_cfg->rx_mintmr_trigger = LIO_INTRMOD_RXMINTMR_TRIGGER;
3577         intrmod_cfg->rx_mincnt_trigger = LIO_INTRMOD_RXMINCNT_TRIGGER;
3578         intrmod_cfg->tx_enable = 1;
3579         intrmod_cfg->tx_maxcnt_trigger = LIO_INTRMOD_TXMAXCNT_TRIGGER;
3580         intrmod_cfg->tx_mincnt_trigger = LIO_INTRMOD_TXMINCNT_TRIGGER;
3581         intrmod_cfg->rx_frames = CFG_GET_OQ_INTR_PKT(octeon_get_conf(oct));
3582         intrmod_cfg->rx_usecs = CFG_GET_OQ_INTR_TIME(octeon_get_conf(oct));
3583         dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n");
3584
3585         return retval;
3586
3587 octnet_init_failure:
3588
3589         oct->ifcount = 0;
3590
3591         return retval;
3592 }
3593
3594 /**
3595  * \brief starter callback that invokes the remaining initialization work after
3596  * the NIC is up and running.
3597  * @param octptr  work struct work_struct
3598  */
3599 static void nic_starter(struct work_struct *work)
3600 {
3601         struct octeon_device *oct;
3602         struct cavium_wk *wk = (struct cavium_wk *)work;
3603
3604         oct = (struct octeon_device *)wk->ctxptr;
3605
3606         if (atomic_read(&oct->status) == OCT_DEV_RUNNING)
3607                 return;
3608
3609         /* If the status of the device is CORE_OK, the core
3610          * application has reported its application type. Call
3611          * any registered handlers now and move to the RUNNING
3612          * state.
3613          */
3614         if (atomic_read(&oct->status) != OCT_DEV_CORE_OK) {
3615                 schedule_delayed_work(&oct->nic_poll_work.work,
3616                                       LIQUIDIO_STARTER_POLL_INTERVAL_MS);
3617                 return;
3618         }
3619
3620         atomic_set(&oct->status, OCT_DEV_RUNNING);
3621
3622         if (oct->app_mode && oct->app_mode == CVM_DRV_NIC_APP) {
3623                 dev_dbg(&oct->pci_dev->dev, "Starting NIC module\n");
3624
3625                 if (liquidio_init_nic_module(oct))
3626                         dev_err(&oct->pci_dev->dev, "NIC initialization failed\n");
3627                 else
3628                         handshake[oct->octeon_id].started_ok = 1;
3629         } else {
3630                 dev_err(&oct->pci_dev->dev,
3631                         "Unexpected application running on NIC (%d). Check firmware.\n",
3632                         oct->app_mode);
3633         }
3634
3635         complete(&handshake[oct->octeon_id].started);
3636 }
3637
3638 /**
3639  * \brief Device initialization for each Octeon device that is probed
3640  * @param octeon_dev  octeon device
3641  */
3642 static int octeon_device_init(struct octeon_device *octeon_dev)
3643 {
3644         int j, ret;
3645         char bootcmd[] = "\n";
3646         struct octeon_device_priv *oct_priv =
3647                 (struct octeon_device_priv *)octeon_dev->priv;
3648         atomic_set(&octeon_dev->status, OCT_DEV_BEGIN_STATE);
3649
3650         /* Enable access to the octeon device and make its DMA capability
3651          * known to the OS.
3652          */
3653         if (octeon_pci_os_setup(octeon_dev))
3654                 return 1;
3655
3656         /* Identify the Octeon type and map the BAR address space. */
3657         if (octeon_chip_specific_setup(octeon_dev)) {
3658                 dev_err(&octeon_dev->pci_dev->dev, "Chip specific setup failed\n");
3659                 return 1;
3660         }
3661
3662         atomic_set(&octeon_dev->status, OCT_DEV_PCI_MAP_DONE);
3663
3664         octeon_dev->app_mode = CVM_DRV_INVALID_APP;
3665
3666         /* Do a soft reset of the Octeon device. */
3667         if (octeon_dev->fn_list.soft_reset(octeon_dev))
3668                 return 1;
3669
3670         /* Initialize the dispatch mechanism used to push packets arriving on
3671          * Octeon Output queues.
3672          */
3673         if (octeon_init_dispatch_list(octeon_dev))
3674                 return 1;
3675
3676         octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC,
3677                                     OPCODE_NIC_CORE_DRV_ACTIVE,
3678                                     octeon_core_drv_init,
3679                                     octeon_dev);
3680
3681         INIT_DELAYED_WORK(&octeon_dev->nic_poll_work.work, nic_starter);
3682         octeon_dev->nic_poll_work.ctxptr = (void *)octeon_dev;
3683         schedule_delayed_work(&octeon_dev->nic_poll_work.work,
3684                               LIQUIDIO_STARTER_POLL_INTERVAL_MS);
3685
3686         atomic_set(&octeon_dev->status, OCT_DEV_DISPATCH_INIT_DONE);
3687
3688         octeon_set_io_queues_off(octeon_dev);
3689
3690         /*  Setup the data structures that manage this Octeon's Input queues. */
3691         if (octeon_setup_instr_queues(octeon_dev)) {
3692                 dev_err(&octeon_dev->pci_dev->dev,
3693                         "instruction queue initialization failed\n");
3694                 /* On error, release any previously allocated queues */
3695                 for (j = 0; j < octeon_dev->num_iqs; j++)
3696                         octeon_delete_instr_queue(octeon_dev, j);
3697                 return 1;
3698         }
3699         atomic_set(&octeon_dev->status, OCT_DEV_INSTR_QUEUE_INIT_DONE);
3700
3701         /* Initialize soft command buffer pool
3702          */
3703         if (octeon_setup_sc_buffer_pool(octeon_dev)) {
3704                 dev_err(&octeon_dev->pci_dev->dev, "sc buffer pool allocation failed\n");
3705                 return 1;
3706         }
3707         atomic_set(&octeon_dev->status, OCT_DEV_SC_BUFF_POOL_INIT_DONE);
3708
3709         /* Initialize lists to manage the requests of different types that
3710          * arrive from user & kernel applications for this octeon device.
3711          */
3712         if (octeon_setup_response_list(octeon_dev)) {
3713                 dev_err(&octeon_dev->pci_dev->dev, "Response list allocation failed\n");
3714                 return 1;
3715         }
3716         atomic_set(&octeon_dev->status, OCT_DEV_RESP_LIST_INIT_DONE);
3717
3718         if (octeon_setup_output_queues(octeon_dev)) {
3719                 dev_err(&octeon_dev->pci_dev->dev, "Output queue initialization failed\n");
3720                 /* Release any previously allocated queues */
3721                 for (j = 0; j < octeon_dev->num_oqs; j++)
3722                         octeon_delete_droq(octeon_dev, j);
3723                 return 1;
3724         }
3725
3726         atomic_set(&octeon_dev->status, OCT_DEV_DROQ_INIT_DONE);
3727
3728         /* The input and output queue registers were setup earlier (the queues
3729          * were not enabled). Any additional registers that need to be
3730          * programmed should be done now.
3731          */
3732         ret = octeon_dev->fn_list.setup_device_regs(octeon_dev);
3733         if (ret) {
3734                 dev_err(&octeon_dev->pci_dev->dev,
3735                         "Failed to configure device registers\n");
3736                 return ret;
3737         }
3738
3739         /* Initialize the tasklet that handles output queue packet processing.*/
3740         dev_dbg(&octeon_dev->pci_dev->dev, "Initializing droq tasklet\n");
3741         tasklet_init(&oct_priv->droq_tasklet, octeon_droq_bh,
3742                      (unsigned long)octeon_dev);
3743
3744         /* Setup the interrupt handler and record the INT SUM register address
3745          */
3746         if (octeon_setup_interrupt(octeon_dev))
3747                 return 1;
3748
3749         /* Enable Octeon device interrupts */
3750         octeon_dev->fn_list.enable_interrupt(octeon_dev->chip);
3751
3752         /* Enable the input and output queues for this Octeon device */
3753         octeon_dev->fn_list.enable_io_queues(octeon_dev);
3754
3755         atomic_set(&octeon_dev->status, OCT_DEV_IO_QUEUES_DONE);
3756
3757         dev_dbg(&octeon_dev->pci_dev->dev, "Waiting for DDR initialization...\n");
3758
3759         if (ddr_timeout == 0)
3760                 dev_info(&octeon_dev->pci_dev->dev, "WAITING. Set ddr_timeout to non-zero value to proceed with initialization.\n");
3761
3762         schedule_timeout_uninterruptible(HZ * LIO_RESET_SECS);
3763
3764         /* Wait for the octeon to initialize DDR after the soft-reset. */
3765         while (ddr_timeout == 0) {
3766                 set_current_state(TASK_INTERRUPTIBLE);
3767                 if (schedule_timeout(HZ / 10)) {
3768                         /* user probably pressed Control-C */
3769                         return 1;
3770                 }
3771         }
3772         ret = octeon_wait_for_ddr_init(octeon_dev, &ddr_timeout);
3773         if (ret) {
3774                 dev_err(&octeon_dev->pci_dev->dev,
3775                         "DDR not initialized. Please confirm that board is configured to boot from Flash, ret: %d\n",
3776                         ret);
3777                 return 1;
3778         }
3779
3780         if (octeon_wait_for_bootloader(octeon_dev, 1000) != 0) {
3781                 dev_err(&octeon_dev->pci_dev->dev, "Board not responding\n");
3782                 return 1;
3783         }
3784
3785         /* Divert uboot to take commands from host instead. */
3786         ret = octeon_console_send_cmd(octeon_dev, bootcmd, 50);
3787
3788         dev_dbg(&octeon_dev->pci_dev->dev, "Initializing consoles\n");
3789         ret = octeon_init_consoles(octeon_dev);
3790         if (ret) {
3791                 dev_err(&octeon_dev->pci_dev->dev, "Could not access board consoles\n");
3792                 return 1;
3793         }
3794         ret = octeon_add_console(octeon_dev, 0);
3795         if (ret) {
3796                 dev_err(&octeon_dev->pci_dev->dev, "Could not access board console\n");
3797                 return 1;
3798         }
3799
3800         atomic_set(&octeon_dev->status, OCT_DEV_CONSOLE_INIT_DONE);
3801
3802         dev_dbg(&octeon_dev->pci_dev->dev, "Loading firmware\n");
3803         ret = load_firmware(octeon_dev);
3804         if (ret) {
3805                 dev_err(&octeon_dev->pci_dev->dev, "Could not load firmware to board\n");
3806                 return 1;
3807         }
3808
3809         handshake[octeon_dev->octeon_id].init_ok = 1;
3810         complete(&handshake[octeon_dev->octeon_id].init);
3811
3812         atomic_set(&octeon_dev->status, OCT_DEV_HOST_OK);
3813
3814         /* Send Credit for Octeon Output queues. Credits are always sent after
3815          * the output queue is enabled.
3816          */
3817         for (j = 0; j < octeon_dev->num_oqs; j++)
3818                 writel(octeon_dev->droq[j]->max_count,
3819                        octeon_dev->droq[j]->pkts_credit_reg);
3820
3821         /* Packets can start arriving on the output queues from this point. */
3822
3823         return 0;
3824 }
3825
3826 /**
3827  * \brief Exits the module
3828  */
3829 static void __exit liquidio_exit(void)
3830 {
3831         liquidio_deinit_pci();
3832
3833         pr_info("LiquidIO network module is now unloaded\n");
3834 }
3835
3836 module_init(liquidio_init);
3837 module_exit(liquidio_exit);