drivers/scsi/bnx2i/bnx2i

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
bnx2i_identify_device
get_adapter_list_head
bnx2i_find_hba_for_cnic
bnx2i_start
bnx2i_chip_cleanup
bnx2i_stop
bnx2i_init_one
bnx2i_ulp_init
bnx2i_ulp_exit
bnx2i_get_stats
bnx2i_cpu_online
bnx2i_cpu_offline
bnx2i_mod_init
bnx2i_mod_exit
   1 /* bnx2i.c: QLogic NetXtreme II iSCSI driver.
   2  *
   3  * Copyright (c) 2006 - 2013 Broadcom Corporation
   4  * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
   5  * Copyright (c) 2007, 2008 Mike Christie
   6  * Copyright (c) 2014, QLogic Corporation
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation.
  11  *
  12  * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
  13  * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
  14  * Maintained by: QLogic-Storage-Upstream@qlogic.com
  15  */
  16 
  17 #include "bnx2i.h"
  18 
  19 static struct list_head adapter_list = LIST_HEAD_INIT(adapter_list);
  20 static u32 adapter_count;
  21 
  22 #define DRV_MODULE_NAME         "bnx2i"
  23 #define DRV_MODULE_VERSION      "2.7.10.1"
  24 #define DRV_MODULE_RELDATE      "Jul 16, 2014"
  25 
  26 static char version[] =
  27                 "QLogic NetXtreme II iSCSI Driver " DRV_MODULE_NAME \
  28                 " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
  29 
  30 
  31 MODULE_AUTHOR("Anil Veerabhadrappa <anilgv@broadcom.com> and "
  32               "Eddie Wai <eddie.wai@broadcom.com>");
  33 
  34 MODULE_DESCRIPTION("QLogic NetXtreme II BCM5706/5708/5709/57710/57711/57712"
  35                    "/57800/57810/57840 iSCSI Driver");
  36 MODULE_LICENSE("GPL");
  37 MODULE_VERSION(DRV_MODULE_VERSION);
  38 
  39 static DEFINE_MUTEX(bnx2i_dev_lock);
  40 
  41 unsigned int event_coal_min = 24;
  42 module_param(event_coal_min, int, 0664);
  43 MODULE_PARM_DESC(event_coal_min, "Event Coalescing Minimum Commands");
  44 
  45 unsigned int event_coal_div = 2;
  46 module_param(event_coal_div, int, 0664);
  47 MODULE_PARM_DESC(event_coal_div, "Event Coalescing Divide Factor");
  48 
  49 unsigned int en_tcp_dack = 1;
  50 module_param(en_tcp_dack, int, 0664);
  51 MODULE_PARM_DESC(en_tcp_dack, "Enable TCP Delayed ACK");
  52 
  53 unsigned int error_mask1 = 0x00;
  54 module_param(error_mask1, uint, 0664);
  55 MODULE_PARM_DESC(error_mask1, "Config FW iSCSI Error Mask #1");
  56 
  57 unsigned int error_mask2 = 0x00;
  58 module_param(error_mask2, uint, 0664);
  59 MODULE_PARM_DESC(error_mask2, "Config FW iSCSI Error Mask #2");
  60 
  61 unsigned int sq_size;
  62 module_param(sq_size, int, 0664);
  63 MODULE_PARM_DESC(sq_size, "Configure SQ size");
  64 
  65 unsigned int rq_size = BNX2I_RQ_WQES_DEFAULT;
  66 module_param(rq_size, int, 0664);
  67 MODULE_PARM_DESC(rq_size, "Configure RQ size");
  68 
  69 u64 iscsi_error_mask = 0x00;
  70 
  71 DEFINE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
  72 
  73 /**
  74  * bnx2i_identify_device - identifies NetXtreme II device type
  75  * @hba:                Adapter structure pointer
  76  * @cnic:               Corresponding cnic device
  77  *
  78  * This function identifies the NX2 device type and sets appropriate
  79  *      queue mailbox register access method, 5709 requires driver to
  80  *      access MBOX regs using *bin* mode
  81  */
  82 void bnx2i_identify_device(struct bnx2i_hba *hba, struct cnic_dev *dev)
  83 {
  84         hba->cnic_dev_type = 0;
  85         if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) {
  86                 if (hba->pci_did == PCI_DEVICE_ID_NX2_5706 ||
  87                     hba->pci_did == PCI_DEVICE_ID_NX2_5706S) {
  88                         set_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type);
  89                 } else if (hba->pci_did == PCI_DEVICE_ID_NX2_5708 ||
  90                     hba->pci_did == PCI_DEVICE_ID_NX2_5708S) {
  91                         set_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type);
  92                 } else if (hba->pci_did == PCI_DEVICE_ID_NX2_5709 ||
  93                     hba->pci_did == PCI_DEVICE_ID_NX2_5709S) {
  94                         set_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type);
  95                         hba->mail_queue_access = BNX2I_MQ_BIN_MODE;
  96                 }
  97         } else if (test_bit(CNIC_F_BNX2X_CLASS, &dev->flags)) {
  98                 set_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type);
  99         } else {
 100                 printk(KERN_ALERT "bnx2i: unknown device, 0x%x\n",
 101                                   hba->pci_did);
 102         }
 103 }
 104 
 105 
 106 /**
 107  * get_adapter_list_head - returns head of adapter list
 108  */
 109 struct bnx2i_hba *get_adapter_list_head(void)
 110 {
 111         struct bnx2i_hba *hba = NULL;
 112         struct bnx2i_hba *tmp_hba;
 113 
 114         if (!adapter_count)
 115                 goto hba_not_found;
 116 
 117         mutex_lock(&bnx2i_dev_lock);
 118         list_for_each_entry(tmp_hba, &adapter_list, link) {
 119                 if (tmp_hba->cnic && tmp_hba->cnic->cm_select_dev) {
 120                         hba = tmp_hba;
 121                         break;
 122                 }
 123         }
 124         mutex_unlock(&bnx2i_dev_lock);
 125 hba_not_found:
 126         return hba;
 127 }
 128 
 129 
 130 /**
 131  * bnx2i_find_hba_for_cnic - maps cnic device instance to bnx2i adapter instance
 132  * @cnic:       pointer to cnic device instance
 133  *
 134  */
 135 struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic)
 136 {
 137         struct bnx2i_hba *hba, *temp;
 138 
 139         mutex_lock(&bnx2i_dev_lock);
 140         list_for_each_entry_safe(hba, temp, &adapter_list, link) {
 141                 if (hba->cnic == cnic) {
 142                         mutex_unlock(&bnx2i_dev_lock);
 143                         return hba;
 144                 }
 145         }
 146         mutex_unlock(&bnx2i_dev_lock);
 147         return NULL;
 148 }
 149 
 150 
 151 /**
 152  * bnx2i_start - cnic callback to initialize & start adapter instance
 153  * @handle:     transparent handle pointing to adapter structure
 154  *
 155  * This function maps adapter structure to pcidev structure and initiates
 156  *      firmware handshake to enable/initialize on chip iscsi components
 157  *      This bnx2i - cnic interface api callback is issued after following
 158  *      2 conditions are met -
 159  *        a) underlying network interface is up (marked by event 'NETDEV_UP'
 160  *              from netdev
 161  *        b) bnx2i adapter instance is registered
 162  */
 163 void bnx2i_start(void *handle)
 164 {
 165 #define BNX2I_INIT_POLL_TIME    (1000 / HZ)
 166         struct bnx2i_hba *hba = handle;
 167         int i = HZ;
 168 
 169         /* On some bnx2x devices, it is possible that iSCSI is no
 170          * longer supported after firmware is downloaded.  In that
 171          * case, the iscsi_init_msg will return failure.
 172          */
 173 
 174         bnx2i_send_fw_iscsi_init_msg(hba);
 175         while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) &&
 176                !test_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state) && i--)
 177                 msleep(BNX2I_INIT_POLL_TIME);
 178 }
 179 
 180 
 181 /**
 182  * bnx2i_chip_cleanup - local routine to handle chip cleanup
 183  * @hba:        Adapter instance to register
 184  *
 185  * Driver checks if adapter still has any active connections before
 186  *      executing the cleanup process
 187  */
 188 static void bnx2i_chip_cleanup(struct bnx2i_hba *hba)
 189 {
 190         struct bnx2i_endpoint *bnx2i_ep;
 191         struct list_head *pos, *tmp;
 192 
 193         if (hba->ofld_conns_active) {
 194                 /* Stage to force the disconnection
 195                  * This is the case where the daemon is either slow or
 196                  * not present
 197                  */
 198                 printk(KERN_ALERT "bnx2i: (%s) chip cleanup for %d active "
 199                         "connections\n", hba->netdev->name,
 200                         hba->ofld_conns_active);
 201                 mutex_lock(&hba->net_dev_lock);
 202                 list_for_each_safe(pos, tmp, &hba->ep_active_list) {
 203                         bnx2i_ep = list_entry(pos, struct bnx2i_endpoint, link);
 204                         /* Clean up the chip only */
 205                         bnx2i_hw_ep_disconnect(bnx2i_ep);
 206                         bnx2i_ep->cm_sk = NULL;
 207                 }
 208                 mutex_unlock(&hba->net_dev_lock);
 209         }
 210 }
 211 
 212 
 213 /**
 214  * bnx2i_stop - cnic callback to shutdown adapter instance
 215  * @handle:     transparent handle pointing to adapter structure
 216  *
 217  * driver checks if adapter is already in shutdown mode, if not start
 218  *      the shutdown process
 219  */
 220 void bnx2i_stop(void *handle)
 221 {
 222         struct bnx2i_hba *hba = handle;
 223         int conns_active;
 224         int wait_delay = 1 * HZ;
 225 
 226         /* check if cleanup happened in GOING_DOWN context */
 227         if (!test_and_set_bit(ADAPTER_STATE_GOING_DOWN,
 228                               &hba->adapter_state)) {
 229                 iscsi_host_for_each_session(hba->shost,
 230                                             bnx2i_drop_session);
 231                 wait_delay = hba->hba_shutdown_tmo;
 232         }
 233         /* Wait for inflight offload connection tasks to complete before
 234          * proceeding. Forcefully terminate all connection recovery in
 235          * progress at the earliest, either in bind(), send_pdu(LOGIN),
 236          * or conn_start()
 237          */
 238         wait_event_interruptible_timeout(hba->eh_wait,
 239                                          (list_empty(&hba->ep_ofld_list) &&
 240                                          list_empty(&hba->ep_destroy_list)),
 241                                          2 * HZ);
 242         /* Wait for all endpoints to be torn down, Chip will be reset once
 243          *  control returns to network driver. So it is required to cleanup and
 244          * release all connection resources before returning from this routine.
 245          */
 246         while (hba->ofld_conns_active) {
 247                 conns_active = hba->ofld_conns_active;
 248                 wait_event_interruptible_timeout(hba->eh_wait,
 249                                 (hba->ofld_conns_active != conns_active),
 250                                 wait_delay);
 251                 if (hba->ofld_conns_active == conns_active)
 252                         break;
 253         }
 254         bnx2i_chip_cleanup(hba);
 255 
 256         /* This flag should be cleared last so that ep_disconnect() gracefully
 257          * cleans up connection context
 258          */
 259         clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
 260         clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
 261 }
 262 
 263 
 264 /**
 265  * bnx2i_init_one - initialize an adapter instance and allocate memory resources
 266  * @hba:        bnx2i adapter instance
 267  * @cnic:       cnic device handle
 268  *
 269  * Global resource lock is held during critical sections below. This routine is
 270  *      called from either cnic_register_driver() or device hot plug context and
 271  *      and does majority of device specific initialization
 272  */
 273 static int bnx2i_init_one(struct bnx2i_hba *hba, struct cnic_dev *cnic)
 274 {
 275         int rc;
 276 
 277         mutex_lock(&bnx2i_dev_lock);
 278         if (!cnic->max_iscsi_conn) {
 279                 printk(KERN_ALERT "bnx2i: dev %s does not support "
 280                         "iSCSI\n", hba->netdev->name);
 281                 rc = -EOPNOTSUPP;
 282                 goto out;
 283         }
 284 
 285         hba->cnic = cnic;
 286         rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
 287         if (!rc) {
 288                 hba->age++;
 289                 set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
 290                 list_add_tail(&hba->link, &adapter_list);
 291                 adapter_count++;
 292         } else if (rc == -EBUSY)        /* duplicate registration */
 293                 printk(KERN_ALERT "bnx2i, duplicate registration"
 294                                   "hba=%p, cnic=%p\n", hba, cnic);
 295         else if (rc == -EAGAIN)
 296                 printk(KERN_ERR "bnx2i, driver not registered\n");
 297         else if (rc == -EINVAL)
 298                 printk(KERN_ERR "bnx2i, invalid type %d\n", CNIC_ULP_ISCSI);
 299         else
 300                 printk(KERN_ERR "bnx2i dev reg, unknown error, %d\n", rc);
 301 
 302 out:
 303         mutex_unlock(&bnx2i_dev_lock);
 304 
 305         return rc;
 306 }
 307 
 308 
 309 /**
 310  * bnx2i_ulp_init - initialize an adapter instance
 311  * @dev:        cnic device handle
 312  *
 313  * Called from cnic_register_driver() context to initialize all enumerated
 314  *      cnic devices. This routine allocate adapter structure and other
 315  *      device specific resources.
 316  */
 317 void bnx2i_ulp_init(struct cnic_dev *dev)
 318 {
 319         struct bnx2i_hba *hba;
 320 
 321         /* Allocate a HBA structure for this device */
 322         hba = bnx2i_alloc_hba(dev);
 323         if (!hba) {
 324                 printk(KERN_ERR "bnx2i init: hba initialization failed\n");
 325                 return;
 326         }
 327 
 328         /* Get PCI related information and update hba struct members */
 329         clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
 330         if (bnx2i_init_one(hba, dev)) {
 331                 printk(KERN_ERR "bnx2i - hba %p init failed\n", hba);
 332                 bnx2i_free_hba(hba);
 333         }
 334 }
 335 
 336 
 337 /**
 338  * bnx2i_ulp_exit - shuts down adapter instance and frees all resources
 339  * @dev:        cnic device handle
 340  *
 341  */
 342 void bnx2i_ulp_exit(struct cnic_dev *dev)
 343 {
 344         struct bnx2i_hba *hba;
 345 
 346         hba = bnx2i_find_hba_for_cnic(dev);
 347         if (!hba) {
 348                 printk(KERN_INFO "bnx2i_ulp_exit: hba not "
 349                                  "found, dev 0x%p\n", dev);
 350                 return;
 351         }
 352         mutex_lock(&bnx2i_dev_lock);
 353         list_del_init(&hba->link);
 354         adapter_count--;
 355 
 356         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
 357                 hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
 358                 clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
 359         }
 360         mutex_unlock(&bnx2i_dev_lock);
 361 
 362         bnx2i_free_hba(hba);
 363 }
 364 
 365 
 366 /**
 367  * bnx2i_get_stats - Retrieve various statistic from iSCSI offload
 368  * @handle:     bnx2i_hba
 369  *
 370  * function callback exported via bnx2i - cnic driver interface to
 371  *      retrieve various iSCSI offload related statistics.
 372  */
 373 int bnx2i_get_stats(void *handle)
 374 {
 375         struct bnx2i_hba *hba = handle;
 376         struct iscsi_stats_info *stats;
 377 
 378         if (!hba)
 379                 return -EINVAL;
 380 
 381         stats = (struct iscsi_stats_info *)hba->cnic->stats_addr;
 382 
 383         if (!stats)
 384                 return -ENOMEM;
 385 
 386         strlcpy(stats->version, DRV_MODULE_VERSION, sizeof(stats->version));
 387         memcpy(stats->mac_add1 + 2, hba->cnic->mac_addr, ETH_ALEN);
 388 
 389         stats->max_frame_size = hba->netdev->mtu;
 390         stats->txq_size = hba->max_sqes;
 391         stats->rxq_size = hba->max_cqes;
 392 
 393         stats->txq_avg_depth = 0;
 394         stats->rxq_avg_depth = 0;
 395 
 396         GET_STATS_64(hba, stats, rx_pdus);
 397         GET_STATS_64(hba, stats, rx_bytes);
 398 
 399         GET_STATS_64(hba, stats, tx_pdus);
 400         GET_STATS_64(hba, stats, tx_bytes);
 401 
 402         return 0;
 403 }
 404 
 405 
 406 /**
 407  * bnx2i_cpu_online - Create a receive thread for an online CPU
 408  *
 409  * @cpu:        cpu index for the online cpu
 410  */
 411 static int bnx2i_cpu_online(unsigned int cpu)
 412 {
 413         struct bnx2i_percpu_s *p;
 414         struct task_struct *thread;
 415 
 416         p = &per_cpu(bnx2i_percpu, cpu);
 417 
 418         thread = kthread_create_on_node(bnx2i_percpu_io_thread, (void *)p,
 419                                         cpu_to_node(cpu),
 420                                         "bnx2i_thread/%d", cpu);
 421         if (IS_ERR(thread))
 422                 return PTR_ERR(thread);
 423 
 424         /* bind thread to the cpu */
 425         kthread_bind(thread, cpu);
 426         p->iothread = thread;
 427         wake_up_process(thread);
 428         return 0;
 429 }
 430 
 431 static int bnx2i_cpu_offline(unsigned int cpu)
 432 {
 433         struct bnx2i_percpu_s *p;
 434         struct task_struct *thread;
 435         struct bnx2i_work *work, *tmp;
 436 
 437         /* Prevent any new work from being queued for this CPU */
 438         p = &per_cpu(bnx2i_percpu, cpu);
 439         spin_lock_bh(&p->p_work_lock);
 440         thread = p->iothread;
 441         p->iothread = NULL;
 442 
 443         /* Free all work in the list */
 444         list_for_each_entry_safe(work, tmp, &p->work_list, list) {
 445                 list_del_init(&work->list);
 446                 bnx2i_process_scsi_cmd_resp(work->session,
 447                                             work->bnx2i_conn, &work->cqe);
 448                 kfree(work);
 449         }
 450 
 451         spin_unlock_bh(&p->p_work_lock);
 452         if (thread)
 453                 kthread_stop(thread);
 454         return 0;
 455 }
 456 
 457 static enum cpuhp_state bnx2i_online_state;
 458 
 459 /**
 460  * bnx2i_mod_init - module init entry point
 461  *
 462  * initialize any driver wide global data structures such as endpoint pool,
 463  *      tcp port manager/queue, sysfs. finally driver will register itself
 464  *      with the cnic module
 465  */
 466 static int __init bnx2i_mod_init(void)
 467 {
 468         int err;
 469         unsigned cpu = 0;
 470         struct bnx2i_percpu_s *p;
 471 
 472         printk(KERN_INFO "%s", version);
 473 
 474         if (sq_size && !is_power_of_2(sq_size))
 475                 sq_size = roundup_pow_of_two(sq_size);
 476 
 477         mutex_init(&bnx2i_dev_lock);
 478 
 479         bnx2i_scsi_xport_template =
 480                         iscsi_register_transport(&bnx2i_iscsi_transport);
 481         if (!bnx2i_scsi_xport_template) {
 482                 printk(KERN_ERR "Could not register bnx2i transport.\n");
 483                 err = -ENOMEM;
 484                 goto out;
 485         }
 486 
 487         err = cnic_register_driver(CNIC_ULP_ISCSI, &bnx2i_cnic_cb);
 488         if (err) {
 489                 printk(KERN_ERR "Could not register bnx2i cnic driver.\n");
 490                 goto unreg_xport;
 491         }
 492 
 493         /* Create percpu kernel threads to handle iSCSI I/O completions */
 494         for_each_possible_cpu(cpu) {
 495                 p = &per_cpu(bnx2i_percpu, cpu);
 496                 INIT_LIST_HEAD(&p->work_list);
 497                 spin_lock_init(&p->p_work_lock);
 498                 p->iothread = NULL;
 499         }
 500 
 501         err = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/bnx2i:online",
 502                                 bnx2i_cpu_online, bnx2i_cpu_offline);
 503         if (err < 0)
 504                 goto unreg_driver;
 505         bnx2i_online_state = err;
 506         return 0;
 507 
 508 unreg_driver:
 509         cnic_unregister_driver(CNIC_ULP_ISCSI);
 510 unreg_xport:
 511         iscsi_unregister_transport(&bnx2i_iscsi_transport);
 512 out:
 513         return err;
 514 }
 515 
 516 
 517 /**
 518  * bnx2i_mod_exit - module cleanup/exit entry point
 519  *
 520  * Global resource lock and host adapter lock is held during critical sections
 521  *      in this function. Driver will browse through the adapter list, cleans-up
 522  *      each instance, unregisters iscsi transport name and finally driver will
 523  *      unregister itself with the cnic module
 524  */
 525 static void __exit bnx2i_mod_exit(void)
 526 {
 527         struct bnx2i_hba *hba;
 528 
 529         mutex_lock(&bnx2i_dev_lock);
 530         while (!list_empty(&adapter_list)) {
 531                 hba = list_entry(adapter_list.next, struct bnx2i_hba, link);
 532                 list_del(&hba->link);
 533                 adapter_count--;
 534 
 535                 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
 536                         bnx2i_chip_cleanup(hba);
 537                         hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
 538                         clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
 539                 }
 540 
 541                 bnx2i_free_hba(hba);
 542         }
 543         mutex_unlock(&bnx2i_dev_lock);
 544 
 545         cpuhp_remove_state(bnx2i_online_state);
 546 
 547         iscsi_unregister_transport(&bnx2i_iscsi_transport);
 548         cnic_unregister_driver(CNIC_ULP_ISCSI);
 549 }
 550 
 551 module_init(bnx2i_mod_init);
 552 module_exit(bnx2i_mod_exit);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/scsi/bnx2i/bnx2i_init.c

DEFINITIONS
