drivers/scsi/qedi/qedi_main.c

   1 /*
   2  * QLogic iSCSI Offload Driver
   3  * Copyright (c) 2016 Cavium Inc.
   4  *
   5  * This software is available under the terms of the GNU General Public License
   6  * (GPL) Version 2, available from the file COPYING in the main directory of
   7  * this source tree.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/pci.h>
  12 #include <linux/kernel.h>
  13 #include <linux/if_arp.h>
  14 #include <scsi/iscsi_if.h>
  15 #include <linux/inet.h>
  16 #include <net/arp.h>
  17 #include <linux/list.h>
  18 #include <linux/kthread.h>
  19 #include <linux/mm.h>
  20 #include <linux/if_vlan.h>
  21 #include <linux/cpu.h>
  22 #include <linux/iscsi_boot_sysfs.h>
  23
  24 #include <scsi/scsi_cmnd.h>
  25 #include <scsi/scsi_device.h>
  26 #include <scsi/scsi_eh.h>
  27 #include <scsi/scsi_host.h>
  28 #include <scsi/scsi.h>
  29
  30 #include "qedi.h"
  31 #include "qedi_gbl.h"
  32 #include "qedi_iscsi.h"
  33
  34 static uint qedi_fw_debug;
  35 module_param(qedi_fw_debug, uint, 0644);
  36 MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
  37
  38 uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
  39 module_param(qedi_dbg_log, uint, 0644);
  40 MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
  41
  42 uint qedi_io_tracing;
  43 module_param(qedi_io_tracing, uint, 0644);
  44 MODULE_PARM_DESC(qedi_io_tracing,
  45                  " Enable logging of SCSI requests/completions into trace buffer. (default off).");
  46
  47 const struct qed_iscsi_ops *qedi_ops;
  48 static struct scsi_transport_template *qedi_scsi_transport;
  49 static struct pci_driver qedi_pci_driver;
  50 static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
  51 static LIST_HEAD(qedi_udev_list);
  52 /* Static function declaration */
  53 static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
  54 static void qedi_free_global_queues(struct qedi_ctx *qedi);
  55 static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
  56 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
  57 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
  58
  59 static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
  60 {
  61         struct qedi_ctx *qedi;
  62         struct qedi_endpoint *qedi_ep;
  63         struct iscsi_eqe_data *data;
  64         int rval = 0;
  65
  66         if (!context || !fw_handle) {
  67                 QEDI_ERR(NULL, "Recv event with ctx NULL\n");
  68                 return -EINVAL;
  69         }
  70
  71         qedi = (struct qedi_ctx *)context;
  72         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  73                   "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
  74
  75         data = (struct iscsi_eqe_data *)fw_handle;
  76         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  77                   "icid=0x%x conn_id=0x%x err-code=0x%x error-pdu-opcode-reserved=0x%x\n",
  78                    data->icid, data->conn_id, data->error_code,
  79                    data->error_pdu_opcode_reserved);
  80
  81         qedi_ep = qedi->ep_tbl[data->icid];
  82
  83         if (!qedi_ep) {
  84                 QEDI_WARN(&qedi->dbg_ctx,
  85                           "Cannot process event, ep already disconnected, cid=0x%x\n",
  86                            data->icid);
  87                 WARN_ON(1);
  88                 return -ENODEV;
  89         }
  90
  91         switch (fw_event_code) {
  92         case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
  93                 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
  94                         qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
  95
  96                 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
  97                 break;
  98         case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
  99                 qedi_ep->state = EP_STATE_DISCONN_COMPL;
 100                 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
 101                 break;
 102         case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
 103                 qedi_process_iscsi_error(qedi_ep, data);
 104                 break;
 105         case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
 106         case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
 107         case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
 108         case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
 109         case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
 110         case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
 111         case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
 112                 qedi_process_tcp_error(qedi_ep, data);
 113                 break;
 114         default:
 115                 QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
 116                          fw_event_code);
 117         }
 118
 119         return rval;
 120 }
 121
 122 static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
 123 {
 124         struct qedi_uio_dev *udev = uinfo->priv;
 125         struct qedi_ctx *qedi = udev->qedi;
 126
 127         if (!capable(CAP_NET_ADMIN))
 128                 return -EPERM;
 129
 130         if (udev->uio_dev != -1)
 131                 return -EBUSY;
 132
 133         rtnl_lock();
 134         udev->uio_dev = iminor(inode);
 135         qedi_reset_uio_rings(udev);
 136         set_bit(UIO_DEV_OPENED, &qedi->flags);
 137         rtnl_unlock();
 138
 139         return 0;
 140 }
 141
 142 static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
 143 {
 144         struct qedi_uio_dev *udev = uinfo->priv;
 145         struct qedi_ctx *qedi = udev->qedi;
 146
 147         udev->uio_dev = -1;
 148         clear_bit(UIO_DEV_OPENED, &qedi->flags);
 149         qedi_ll2_free_skbs(qedi);
 150         return 0;
 151 }
 152
 153 static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
 154 {
 155         if (udev->uctrl) {
 156                 free_page((unsigned long)udev->uctrl);
 157                 udev->uctrl = NULL;
 158         }
 159
 160         if (udev->ll2_ring) {
 161                 free_page((unsigned long)udev->ll2_ring);
 162                 udev->ll2_ring = NULL;
 163         }
 164
 165         if (udev->ll2_buf) {
 166                 free_pages((unsigned long)udev->ll2_buf, 2);
 167                 udev->ll2_buf = NULL;
 168         }
 169 }
 170
 171 static void __qedi_free_uio(struct qedi_uio_dev *udev)
 172 {
 173         uio_unregister_device(&udev->qedi_uinfo);
 174
 175         __qedi_free_uio_rings(udev);
 176
 177         pci_dev_put(udev->pdev);
 178         kfree(udev);
 179 }
 180
 181 static void qedi_free_uio(struct qedi_uio_dev *udev)
 182 {
 183         if (!udev)
 184                 return;
 185
 186         list_del_init(&udev->list);
 187         __qedi_free_uio(udev);
 188 }
 189
 190 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
 191 {
 192         struct qedi_ctx *qedi = NULL;
 193         struct qedi_uio_ctrl *uctrl = NULL;
 194
 195         qedi = udev->qedi;
 196         uctrl = udev->uctrl;
 197
 198         spin_lock_bh(&qedi->ll2_lock);
 199         uctrl->host_rx_cons = 0;
 200         uctrl->hw_rx_prod = 0;
 201         uctrl->hw_rx_bd_prod = 0;
 202         uctrl->host_rx_bd_cons = 0;
 203
 204         memset(udev->ll2_ring, 0, udev->ll2_ring_size);
 205         memset(udev->ll2_buf, 0, udev->ll2_buf_size);
 206         spin_unlock_bh(&qedi->ll2_lock);
 207 }
 208
 209 static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
 210 {
 211         int rc = 0;
 212
 213         if (udev->ll2_ring || udev->ll2_buf)
 214                 return rc;
 215
 216         /* Memory for control area.  */
 217         udev->uctrl = (void *)get_zeroed_page(GFP_KERNEL);
 218         if (!udev->uctrl)
 219                 return -ENOMEM;
 220
 221         /* Allocating memory for LL2 ring  */
 222         udev->ll2_ring_size = QEDI_PAGE_SIZE;
 223         udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
 224         if (!udev->ll2_ring) {
 225                 rc = -ENOMEM;
 226                 goto exit_alloc_ring;
 227         }
 228
 229         /* Allocating memory for Tx/Rx pkt buffer */
 230         udev->ll2_buf_size = TX_RX_RING * LL2_SINGLE_BUF_SIZE;
 231         udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
 232         udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
 233                                                  __GFP_ZERO, 2);
 234         if (!udev->ll2_buf) {
 235                 rc = -ENOMEM;
 236                 goto exit_alloc_buf;
 237         }
 238         return rc;
 239
 240 exit_alloc_buf:
 241         free_page((unsigned long)udev->ll2_ring);
 242         udev->ll2_ring = NULL;
 243 exit_alloc_ring:
 244         return rc;
 245 }
 246
 247 static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
 248 {
 249         struct qedi_uio_dev *udev = NULL;
 250         int rc = 0;
 251
 252         list_for_each_entry(udev, &qedi_udev_list, list) {
 253                 if (udev->pdev == qedi->pdev) {
 254                         udev->qedi = qedi;
 255                         if (__qedi_alloc_uio_rings(udev)) {
 256                                 udev->qedi = NULL;
 257                                 return -ENOMEM;
 258                         }
 259                         qedi->udev = udev;
 260                         return 0;
 261                 }
 262         }
 263
 264         udev = kzalloc(sizeof(*udev), GFP_KERNEL);
 265         if (!udev) {
 266                 rc = -ENOMEM;
 267                 goto err_udev;
 268         }
 269
 270         udev->uio_dev = -1;
 271
 272         udev->qedi = qedi;
 273         udev->pdev = qedi->pdev;
 274
 275         rc = __qedi_alloc_uio_rings(udev);
 276         if (rc)
 277                 goto err_uctrl;
 278
 279         list_add(&udev->list, &qedi_udev_list);
 280
 281         pci_dev_get(udev->pdev);
 282         qedi->udev = udev;
 283
 284         udev->tx_pkt = udev->ll2_buf;
 285         udev->rx_pkt = udev->ll2_buf + LL2_SINGLE_BUF_SIZE;
 286         return 0;
 287
 288  err_uctrl:
 289         kfree(udev);
 290  err_udev:
 291         return -ENOMEM;
 292 }
 293
 294 static int qedi_init_uio(struct qedi_ctx *qedi)
 295 {
 296         struct qedi_uio_dev *udev = qedi->udev;
 297         struct uio_info *uinfo;
 298         int ret = 0;
 299
 300         if (!udev)
 301                 return -ENOMEM;
 302
 303         uinfo = &udev->qedi_uinfo;
 304
 305         uinfo->mem[0].addr = (unsigned long)udev->uctrl;
 306         uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
 307         uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
 308
 309         uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
 310         uinfo->mem[1].size = udev->ll2_ring_size;
 311         uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
 312
 313         uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
 314         uinfo->mem[2].size = udev->ll2_buf_size;
 315         uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
 316
 317         uinfo->name = "qedi_uio";
 318         uinfo->version = QEDI_MODULE_VERSION;
 319         uinfo->irq = UIO_IRQ_CUSTOM;
 320
 321         uinfo->open = qedi_uio_open;
 322         uinfo->release = qedi_uio_close;
 323
 324         if (udev->uio_dev == -1) {
 325                 if (!uinfo->priv) {
 326                         uinfo->priv = udev;
 327
 328                         ret = uio_register_device(&udev->pdev->dev, uinfo);
 329                         if (ret) {
 330                                 QEDI_ERR(&qedi->dbg_ctx,
 331                                          "UIO registration failed\n");
 332                         }
 333                 }
 334         }
 335
 336         return ret;
 337 }
 338
 339 static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
 340                                   struct qed_sb_info *sb_info, u16 sb_id)
 341 {
 342         struct status_block_e4 *sb_virt;
 343         dma_addr_t sb_phys;
 344         int ret;
 345
 346         sb_virt = dma_alloc_coherent(&qedi->pdev->dev,
 347                                      sizeof(struct status_block_e4), &sb_phys,
 348                                      GFP_KERNEL);
 349         if (!sb_virt) {
 350                 QEDI_ERR(&qedi->dbg_ctx,
 351                          "Status block allocation failed for id = %d.\n",
 352                           sb_id);
 353                 return -ENOMEM;
 354         }
 355
 356         ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
 357                                        sb_id, QED_SB_TYPE_STORAGE);
 358         if (ret) {
 359                 QEDI_ERR(&qedi->dbg_ctx,
 360                          "Status block initialization failed for id = %d.\n",
 361                           sb_id);
 362                 return ret;
 363         }
 364
 365         return 0;
 366 }
 367
 368 static void qedi_free_sb(struct qedi_ctx *qedi)
 369 {
 370         struct qed_sb_info *sb_info;
 371         int id;
 372
 373         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 374                 sb_info = &qedi->sb_array[id];
 375                 if (sb_info->sb_virt)
 376                         dma_free_coherent(&qedi->pdev->dev,
 377                                           sizeof(*sb_info->sb_virt),
 378                                           (void *)sb_info->sb_virt,
 379                                           sb_info->sb_phys);
 380         }
 381 }
 382
 383 static void qedi_free_fp(struct qedi_ctx *qedi)
 384 {
 385         kfree(qedi->fp_array);
 386         kfree(qedi->sb_array);
 387 }
 388
 389 static void qedi_destroy_fp(struct qedi_ctx *qedi)
 390 {
 391         qedi_free_sb(qedi);
 392         qedi_free_fp(qedi);
 393 }
 394
 395 static int qedi_alloc_fp(struct qedi_ctx *qedi)
 396 {
 397         int ret = 0;
 398
 399         qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
 400                                  sizeof(struct qedi_fastpath), GFP_KERNEL);
 401         if (!qedi->fp_array) {
 402                 QEDI_ERR(&qedi->dbg_ctx,
 403                          "fastpath fp array allocation failed.\n");
 404                 return -ENOMEM;
 405         }
 406
 407         qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
 408                                  sizeof(struct qed_sb_info), GFP_KERNEL);
 409         if (!qedi->sb_array) {
 410                 QEDI_ERR(&qedi->dbg_ctx,
 411                          "fastpath sb array allocation failed.\n");
 412                 ret = -ENOMEM;
 413                 goto free_fp;
 414         }
 415
 416         return ret;
 417
 418 free_fp:
 419         qedi_free_fp(qedi);
 420         return ret;
 421 }
 422
 423 static void qedi_int_fp(struct qedi_ctx *qedi)
 424 {
 425         struct qedi_fastpath *fp;
 426         int id;
 427
 428         memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
 429                sizeof(*qedi->fp_array));
 430         memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
 431                sizeof(*qedi->sb_array));
 432
 433         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 434                 fp = &qedi->fp_array[id];
 435                 fp->sb_info = &qedi->sb_array[id];
 436                 fp->sb_id = id;
 437                 fp->qedi = qedi;
 438                 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
 439                          "qedi", id);
 440
 441                 /* fp_array[i] ---- irq cookie
 442                  * So init data which is needed in int ctx
 443                  */
 444         }
 445 }
 446
 447 static int qedi_prepare_fp(struct qedi_ctx *qedi)
 448 {
 449         struct qedi_fastpath *fp;
 450         int id, ret = 0;
 451
 452         ret = qedi_alloc_fp(qedi);
 453         if (ret)
 454                 goto err;
 455
 456         qedi_int_fp(qedi);
 457
 458         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 459                 fp = &qedi->fp_array[id];
 460                 ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
 461                 if (ret) {
 462                         QEDI_ERR(&qedi->dbg_ctx,
 463                                  "SB allocation and initialization failed.\n");
 464                         ret = -EIO;
 465                         goto err_init;
 466                 }
 467         }
 468
 469         return 0;
 470
 471 err_init:
 472         qedi_free_sb(qedi);
 473         qedi_free_fp(qedi);
 474 err:
 475         return ret;
 476 }
 477
 478 static int qedi_setup_cid_que(struct qedi_ctx *qedi)
 479 {
 480         int i;
 481
 482         qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
 483                                                    sizeof(u32), GFP_KERNEL);
 484         if (!qedi->cid_que.cid_que_base)
 485                 return -ENOMEM;
 486
 487         qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
 488                                                    sizeof(struct qedi_conn *),
 489                                                    GFP_KERNEL);
 490         if (!qedi->cid_que.conn_cid_tbl) {
 491                 kfree(qedi->cid_que.cid_que_base);
 492                 qedi->cid_que.cid_que_base = NULL;
 493                 return -ENOMEM;
 494         }
 495
 496         qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
 497         qedi->cid_que.cid_q_prod_idx = 0;
 498         qedi->cid_que.cid_q_cons_idx = 0;
 499         qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
 500         qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
 501
 502         for (i = 0; i < qedi->max_active_conns; i++) {
 503                 qedi->cid_que.cid_que[i] = i;
 504                 qedi->cid_que.conn_cid_tbl[i] = NULL;
 505         }
 506
 507         return 0;
 508 }
 509
 510 static void qedi_release_cid_que(struct qedi_ctx *qedi)
 511 {
 512         kfree(qedi->cid_que.cid_que_base);
 513         qedi->cid_que.cid_que_base = NULL;
 514
 515         kfree(qedi->cid_que.conn_cid_tbl);
 516         qedi->cid_que.conn_cid_tbl = NULL;
 517 }
 518
 519 static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
 520                             u16 start_id, u16 next)
 521 {
 522         id_tbl->start = start_id;
 523         id_tbl->max = size;
 524         id_tbl->next = next;
 525         spin_lock_init(&id_tbl->lock);
 526         id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
 527         if (!id_tbl->table)
 528                 return -ENOMEM;
 529
 530         return 0;
 531 }
 532
 533 static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
 534 {
 535         kfree(id_tbl->table);
 536         id_tbl->table = NULL;
 537 }
 538
 539 int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
 540 {
 541         int ret = -1;
 542
 543         id -= id_tbl->start;
 544         if (id >= id_tbl->max)
 545                 return ret;
 546
 547         spin_lock(&id_tbl->lock);
 548         if (!test_bit(id, id_tbl->table)) {
 549                 set_bit(id, id_tbl->table);
 550                 ret = 0;
 551         }
 552         spin_unlock(&id_tbl->lock);
 553         return ret;
 554 }
 555
 556 u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
 557 {
 558         u16 id;
 559
 560         spin_lock(&id_tbl->lock);
 561         id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
 562         if (id >= id_tbl->max) {
 563                 id = QEDI_LOCAL_PORT_INVALID;
 564                 if (id_tbl->next != 0) {
 565                         id = find_first_zero_bit(id_tbl->table, id_tbl->next);
 566                         if (id >= id_tbl->next)
 567                                 id = QEDI_LOCAL_PORT_INVALID;
 568                 }
 569         }
 570
 571         if (id < id_tbl->max) {
 572                 set_bit(id, id_tbl->table);
 573                 id_tbl->next = (id + 1) & (id_tbl->max - 1);
 574                 id += id_tbl->start;
 575         }
 576
 577         spin_unlock(&id_tbl->lock);
 578
 579         return id;
 580 }
 581
 582 void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
 583 {
 584         if (id == QEDI_LOCAL_PORT_INVALID)
 585                 return;
 586
 587         id -= id_tbl->start;
 588         if (id >= id_tbl->max)
 589                 return;
 590
 591         clear_bit(id, id_tbl->table);
 592 }
 593
 594 static void qedi_cm_free_mem(struct qedi_ctx *qedi)
 595 {
 596         kfree(qedi->ep_tbl);
 597         qedi->ep_tbl = NULL;
 598         qedi_free_id_tbl(&qedi->lcl_port_tbl);
 599 }
 600
 601 static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
 602 {
 603         u16 port_id;
 604
 605         qedi->ep_tbl = kzalloc((qedi->max_active_conns *
 606                                 sizeof(struct qedi_endpoint *)), GFP_KERNEL);
 607         if (!qedi->ep_tbl)
 608                 return -ENOMEM;
 609         port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
 610         if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
 611                              QEDI_LOCAL_PORT_MIN, port_id)) {
 612                 qedi_cm_free_mem(qedi);
 613                 return -ENOMEM;
 614         }
 615
 616         return 0;
 617 }
 618
 619 static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
 620 {
 621         struct Scsi_Host *shost;
 622         struct qedi_ctx *qedi = NULL;
 623
 624         shost = iscsi_host_alloc(&qedi_host_template,
 625                                  sizeof(struct qedi_ctx), 0);
 626         if (!shost) {
 627                 QEDI_ERR(NULL, "Could not allocate shost\n");
 628                 goto exit_setup_shost;
 629         }
 630
 631         shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA;
 632         shost->max_channel = 0;
 633         shost->max_lun = ~0;
 634         shost->max_cmd_len = 16;
 635         shost->transportt = qedi_scsi_transport;
 636
 637         qedi = iscsi_host_priv(shost);
 638         memset(qedi, 0, sizeof(*qedi));
 639         qedi->shost = shost;
 640         qedi->dbg_ctx.host_no = shost->host_no;
 641         qedi->pdev = pdev;
 642         qedi->dbg_ctx.pdev = pdev;
 643         qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
 644         qedi->max_sqes = QEDI_SQ_SIZE;
 645
 646         if (shost_use_blk_mq(shost))
 647                 shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
 648
 649         pci_set_drvdata(pdev, qedi);
 650
 651 exit_setup_shost:
 652         return qedi;
 653 }
 654
 655 static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
 656 {
 657         struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
 658         struct qedi_uio_dev *udev;
 659         struct qedi_uio_ctrl *uctrl;
 660         struct skb_work_list *work;
 661         u32 prod;
 662
 663         if (!qedi) {
 664                 QEDI_ERR(NULL, "qedi is NULL\n");
 665                 return -1;
 666         }
 667
 668         if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
 669                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
 670                           "UIO DEV is not opened\n");
 671                 kfree_skb(skb);
 672                 return 0;
 673         }
 674
 675         udev = qedi->udev;
 676         uctrl = udev->uctrl;
 677
 678         work = kzalloc(sizeof(*work), GFP_ATOMIC);
 679         if (!work) {
 680                 QEDI_WARN(&qedi->dbg_ctx,
 681                           "Could not allocate work so dropping frame.\n");
 682                 kfree_skb(skb);
 683                 return 0;
 684         }
 685
 686         INIT_LIST_HEAD(&work->list);
 687         work->skb = skb;
 688
 689         if (skb_vlan_tag_present(skb))
 690                 work->vlan_id = skb_vlan_tag_get(skb);
 691
 692         if (work->vlan_id)
 693                 __vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
 694
 695         spin_lock_bh(&qedi->ll2_lock);
 696         list_add_tail(&work->list, &qedi->ll2_skb_list);
 697
 698         ++uctrl->hw_rx_prod_cnt;
 699         prod = (uctrl->hw_rx_prod + 1) % RX_RING;
 700         if (prod != uctrl->host_rx_cons) {
 701                 uctrl->hw_rx_prod = prod;
 702                 spin_unlock_bh(&qedi->ll2_lock);
 703                 wake_up_process(qedi->ll2_recv_thread);
 704                 return 0;
 705         }
 706
 707         spin_unlock_bh(&qedi->ll2_lock);
 708         return 0;
 709 }
 710
 711 /* map this skb to iscsiuio mmaped region */
 712 static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
 713                                 u16 vlan_id)
 714 {
 715         struct qedi_uio_dev *udev = NULL;
 716         struct qedi_uio_ctrl *uctrl = NULL;
 717         struct qedi_rx_bd rxbd;
 718         struct qedi_rx_bd *p_rxbd;
 719         u32 rx_bd_prod;
 720         void *pkt;
 721         int len = 0;
 722
 723         if (!qedi) {
 724                 QEDI_ERR(NULL, "qedi is NULL\n");
 725                 return -1;
 726         }
 727
 728         udev = qedi->udev;
 729         uctrl = udev->uctrl;
 730         pkt = udev->rx_pkt + (uctrl->hw_rx_prod * LL2_SINGLE_BUF_SIZE);
 731         len = min_t(u32, skb->len, (u32)LL2_SINGLE_BUF_SIZE);
 732         memcpy(pkt, skb->data, len);
 733
 734         memset(&rxbd, 0, sizeof(rxbd));
 735         rxbd.rx_pkt_index = uctrl->hw_rx_prod;
 736         rxbd.rx_pkt_len = len;
 737         rxbd.vlan_id = vlan_id;
 738
 739         uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
 740         rx_bd_prod = uctrl->hw_rx_bd_prod;
 741         p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
 742         p_rxbd += rx_bd_prod;
 743
 744         memcpy(p_rxbd, &rxbd, sizeof(rxbd));
 745
 746         /* notify the iscsiuio about new packet */
 747         uio_event_notify(&udev->qedi_uinfo);
 748
 749         return 0;
 750 }
 751
 752 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
 753 {
 754         struct skb_work_list *work, *work_tmp;
 755
 756         spin_lock_bh(&qedi->ll2_lock);
 757         list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
 758                 list_del(&work->list);
 759                 if (work->skb)
 760                         kfree_skb(work->skb);
 761                 kfree(work);
 762         }
 763         spin_unlock_bh(&qedi->ll2_lock);
 764 }
 765
 766 static int qedi_ll2_recv_thread(void *arg)
 767 {
 768         struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
 769         struct skb_work_list *work, *work_tmp;
 770
 771         set_user_nice(current, -20);
 772
 773         while (!kthread_should_stop()) {
 774                 spin_lock_bh(&qedi->ll2_lock);
 775                 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
 776                                          list) {
 777                         list_del(&work->list);
 778                         qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
 779                         kfree_skb(work->skb);
 780                         kfree(work);
 781                 }
 782                 set_current_state(TASK_INTERRUPTIBLE);
 783                 spin_unlock_bh(&qedi->ll2_lock);
 784                 schedule();
 785         }
 786
 787         __set_current_state(TASK_RUNNING);
 788         return 0;
 789 }
 790
 791 static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
 792 {
 793         u8 num_sq_pages;
 794         u32 log_page_size;
 795         int rval = 0;
 796
 797
 798         num_sq_pages = (MAX_OUSTANDING_TASKS_PER_CON * 8) / PAGE_SIZE;
 799
 800         qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
 801
 802         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 803                   "Number of CQ count is %d\n", qedi->num_queues);
 804
 805         memset(&qedi->pf_params.iscsi_pf_params, 0,
 806                sizeof(qedi->pf_params.iscsi_pf_params));
 807
 808         qedi->p_cpuq = pci_alloc_consistent(qedi->pdev,
 809                         qedi->num_queues * sizeof(struct qedi_glbl_q_params),
 810                         &qedi->hw_p_cpuq);
 811         if (!qedi->p_cpuq) {
 812                 QEDI_ERR(&qedi->dbg_ctx, "pci_alloc_consistent fail\n");
 813                 rval = -1;
 814                 goto err_alloc_mem;
 815         }
 816
 817         rval = qedi_alloc_global_queues(qedi);
 818         if (rval) {
 819                 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
 820                 rval = -1;
 821                 goto err_alloc_mem;
 822         }
 823
 824         qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
 825         qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
 826         qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
 827         qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
 828         qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
 829         qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
 830         qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
 831         qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
 832         qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000;
 833         qedi->pf_params.iscsi_pf_params.max_fin_rt = 2;
 834
 835         for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
 836                 if ((1 << log_page_size) == PAGE_SIZE)
 837                         break;
 838         }
 839         qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
 840
 841         qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
 842                                                            (u64)qedi->hw_p_cpuq;
 843
 844         /* RQ BDQ initializations.
 845          * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
 846          * rqe_log_size: 8 for 256B RQE
 847          */
 848         qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
 849         /* BDQ address and size */
 850         qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
 851                                                         qedi->bdq_pbl_list_dma;
 852         qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
 853                                                 qedi->bdq_pbl_list_num_entries;
 854         qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
 855
 856         /* cq_num_entries: num_tasks + rq_num_entries */
 857         qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
 858
 859         qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
 860         qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
 861
 862 err_alloc_mem:
 863         return rval;
 864 }
 865
 866 /* Free DMA coherent memory for array of queue pointers we pass to qed */
 867 static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
 868 {
 869         size_t size = 0;
 870
 871         if (qedi->p_cpuq) {
 872                 size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
 873                 pci_free_consistent(qedi->pdev, size, qedi->p_cpuq,
 874                                     qedi->hw_p_cpuq);
 875         }
 876
 877         qedi_free_global_queues(qedi);
 878
 879         kfree(qedi->global_queues);
 880 }
 881
 882 static void qedi_link_update(void *dev, struct qed_link_output *link)
 883 {
 884         struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
 885
 886         if (link->link_up) {
 887                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
 888                 atomic_set(&qedi->link_state, QEDI_LINK_UP);
 889         } else {
 890                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 891                           "Link Down event.\n");
 892                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
 893         }
 894 }
 895
 896 static struct qed_iscsi_cb_ops qedi_cb_ops = {
 897         {
 898                 .link_update =          qedi_link_update,
 899         }
 900 };
 901
 902 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
 903                           u16 que_idx, struct qedi_percpu_s *p)
 904 {
 905         struct qedi_work *qedi_work;
 906         struct qedi_conn *q_conn;
 907         struct iscsi_conn *conn;
 908         struct qedi_cmd *qedi_cmd;
 909         u32 iscsi_cid;
 910         int rc = 0;
 911
 912         iscsi_cid  = cqe->cqe_common.conn_id;
 913         q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 914         if (!q_conn) {
 915                 QEDI_WARN(&qedi->dbg_ctx,
 916                           "Session no longer exists for cid=0x%x!!\n",
 917                           iscsi_cid);
 918                 return -1;
 919         }
 920         conn = q_conn->cls_conn->dd_data;
 921
 922         switch (cqe->cqe_common.cqe_type) {
 923         case ISCSI_CQE_TYPE_SOLICITED:
 924         case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
 925                 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
 926                 if (!qedi_cmd) {
 927                         rc = -1;
 928                         break;
 929                 }
 930                 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
 931                 qedi_cmd->cqe_work.qedi = qedi;
 932                 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
 933                 qedi_cmd->cqe_work.que_idx = que_idx;
 934                 qedi_cmd->cqe_work.is_solicited = true;
 935                 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
 936                 break;
 937         case ISCSI_CQE_TYPE_UNSOLICITED:
 938         case ISCSI_CQE_TYPE_DUMMY:
 939         case ISCSI_CQE_TYPE_TASK_CLEANUP:
 940                 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
 941                 if (!qedi_work) {
 942                         rc = -1;
 943                         break;
 944                 }
 945                 INIT_LIST_HEAD(&qedi_work->list);
 946                 qedi_work->qedi = qedi;
 947                 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
 948                 qedi_work->que_idx = que_idx;
 949                 qedi_work->is_solicited = false;
 950                 list_add_tail(&qedi_work->list, &p->work_list);
 951                 break;
 952         default:
 953                 rc = -1;
 954                 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
 955         }
 956         return rc;
 957 }
 958
 959 static bool qedi_process_completions(struct qedi_fastpath *fp)
 960 {
 961         struct qedi_ctx *qedi = fp->qedi;
 962         struct qed_sb_info *sb_info = fp->sb_info;
 963         struct status_block_e4 *sb = sb_info->sb_virt;
 964         struct qedi_percpu_s *p = NULL;
 965         struct global_queue *que;
 966         u16 prod_idx;
 967         unsigned long flags;
 968         union iscsi_cqe *cqe;
 969         int cpu;
 970         int ret;
 971
 972         /* Get the current firmware producer index */
 973         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
 974
 975         if (prod_idx >= QEDI_CQ_SIZE)
 976                 prod_idx = prod_idx % QEDI_CQ_SIZE;
 977
 978         que = qedi->global_queues[fp->sb_id];
 979         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
 980                   "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
 981                   que, prod_idx, que->cq_cons_idx, fp->sb_id);
 982
 983         qedi->intr_cpu = fp->sb_id;
 984         cpu = smp_processor_id();
 985         p = &per_cpu(qedi_percpu, cpu);
 986
 987         if (unlikely(!p->iothread))
 988                 WARN_ON(1);
 989
 990         spin_lock_irqsave(&p->p_work_lock, flags);
 991         while (que->cq_cons_idx != prod_idx) {
 992                 cqe = &que->cq[que->cq_cons_idx];
 993
 994                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
 995                           "cqe=%p prod_idx=%d cons_idx=%d.\n",
 996                           cqe, prod_idx, que->cq_cons_idx);
 997
 998                 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
 999                 if (ret)
1000                         QEDI_WARN(&qedi->dbg_ctx,
1001                                   "Dropping CQE 0x%x for cid=0x%x.\n",
1002                                   que->cq_cons_idx, cqe->cqe_common.conn_id);
1003
1004                 que->cq_cons_idx++;
1005                 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1006                         que->cq_cons_idx = 0;
1007         }
1008         wake_up_process(p->iothread);
1009         spin_unlock_irqrestore(&p->p_work_lock, flags);
1010
1011         return true;
1012 }
1013
1014 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1015 {
1016         struct qedi_ctx *qedi = fp->qedi;
1017         struct global_queue *que;
1018         struct qed_sb_info *sb_info = fp->sb_info;
1019         struct status_block_e4 *sb = sb_info->sb_virt;
1020         u16 prod_idx;
1021
1022         barrier();
1023
1024         /* Get the current firmware producer index */
1025         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1026
1027         /* Get the pointer to the global CQ this completion is on */
1028         que = qedi->global_queues[fp->sb_id];
1029
1030         /* prod idx wrap around uint16 */
1031         if (prod_idx >= QEDI_CQ_SIZE)
1032                 prod_idx = prod_idx % QEDI_CQ_SIZE;
1033
1034         return (que->cq_cons_idx != prod_idx);
1035 }
1036
1037 /* MSI-X fastpath handler code */
1038 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1039 {
1040         struct qedi_fastpath *fp = dev_id;
1041         struct qedi_ctx *qedi = fp->qedi;
1042         bool wake_io_thread = true;
1043
1044         qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1045
1046 process_again:
1047         wake_io_thread = qedi_process_completions(fp);
1048         if (wake_io_thread) {
1049                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1050                           "process already running\n");
1051         }
1052
1053         if (qedi_fp_has_work(fp) == 0)
1054                 qed_sb_update_sb_idx(fp->sb_info);
1055
1056         /* Check for more work */
1057         rmb();
1058
1059         if (qedi_fp_has_work(fp) == 0)
1060                 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1061         else
1062                 goto process_again;
1063
1064         return IRQ_HANDLED;
1065 }
1066
1067 /* simd handler for MSI/INTa */
1068 static void qedi_simd_int_handler(void *cookie)
1069 {
1070         /* Cookie is qedi_ctx struct */
1071         struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1072
1073         QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1074 }
1075
1076 #define QEDI_SIMD_HANDLER_NUM           0
1077 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1078 {
1079         int i;
1080
1081         if (qedi->int_info.msix_cnt) {
1082                 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1083                         synchronize_irq(qedi->int_info.msix[i].vector);
1084                         irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1085                                               NULL);
1086                         free_irq(qedi->int_info.msix[i].vector,
1087                                  &qedi->fp_array[i]);
1088                 }
1089         } else {
1090                 qedi_ops->common->simd_handler_clean(qedi->cdev,
1091                                                      QEDI_SIMD_HANDLER_NUM);
1092         }
1093
1094         qedi->int_info.used_cnt = 0;
1095         qedi_ops->common->set_fp_int(qedi->cdev, 0);
1096 }
1097
1098 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1099 {
1100         int i, rc, cpu;
1101
1102         cpu = cpumask_first(cpu_online_mask);
1103         for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
1104                 rc = request_irq(qedi->int_info.msix[i].vector,
1105                                  qedi_msix_handler, 0, "qedi",
1106                                  &qedi->fp_array[i]);
1107
1108                 if (rc) {
1109                         QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1110                         qedi_sync_free_irqs(qedi);
1111                         return rc;
1112                 }
1113                 qedi->int_info.used_cnt++;
1114                 rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1115                                            get_cpu_mask(cpu));
1116                 cpu = cpumask_next(cpu, cpu_online_mask);
1117         }
1118
1119         return 0;
1120 }
1121
1122 static int qedi_setup_int(struct qedi_ctx *qedi)
1123 {
1124         int rc = 0;
1125
1126         rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1127         rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1128         if (rc)
1129                 goto exit_setup_int;
1130
1131         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1132                   "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1133                    qedi->int_info.msix_cnt, num_online_cpus());
1134
1135         if (qedi->int_info.msix_cnt) {
1136                 rc = qedi_request_msix_irq(qedi);
1137                 goto exit_setup_int;
1138         } else {
1139                 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1140                                                       QEDI_SIMD_HANDLER_NUM,
1141                                                       qedi_simd_int_handler);
1142                 qedi->int_info.used_cnt = 1;
1143         }
1144
1145 exit_setup_int:
1146         return rc;
1147 }
1148
1149 static void qedi_free_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1150 {
1151         if (qedi->iscsi_cfg)
1152                 dma_free_coherent(&qedi->pdev->dev,
1153                                   sizeof(struct nvm_iscsi_cfg),
1154                                   qedi->iscsi_cfg, qedi->nvm_buf_dma);
1155 }
1156
1157 static int qedi_alloc_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1158 {
1159         qedi->iscsi_cfg = dma_zalloc_coherent(&qedi->pdev->dev,
1160                                              sizeof(struct nvm_iscsi_cfg),
1161                                              &qedi->nvm_buf_dma, GFP_KERNEL);
1162         if (!qedi->iscsi_cfg) {
1163                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate NVM BUF.\n");
1164                 return -ENOMEM;
1165         }
1166         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1167                   "NVM BUF addr=0x%p dma=0x%llx.\n", qedi->iscsi_cfg,
1168                   qedi->nvm_buf_dma);
1169
1170         return 0;
1171 }
1172
1173 static void qedi_free_bdq(struct qedi_ctx *qedi)
1174 {
1175         int i;
1176
1177         if (qedi->bdq_pbl_list)
1178                 dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
1179                                   qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1180
1181         if (qedi->bdq_pbl)
1182                 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1183                                   qedi->bdq_pbl, qedi->bdq_pbl_dma);
1184
1185         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1186                 if (qedi->bdq[i].buf_addr) {
1187                         dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1188                                           qedi->bdq[i].buf_addr,
1189                                           qedi->bdq[i].buf_dma);
1190                 }
1191         }
1192 }
1193
1194 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1195 {
1196         int i;
1197         struct global_queue **gl = qedi->global_queues;
1198
1199         for (i = 0; i < qedi->num_queues; i++) {
1200                 if (!gl[i])
1201                         continue;
1202
1203                 if (gl[i]->cq)
1204                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1205                                           gl[i]->cq, gl[i]->cq_dma);
1206                 if (gl[i]->cq_pbl)
1207                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1208                                           gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1209
1210                 kfree(gl[i]);
1211         }
1212         qedi_free_bdq(qedi);
1213         qedi_free_nvm_iscsi_cfg(qedi);
1214 }
1215
1216 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1217 {
1218         int i;
1219         struct scsi_bd *pbl;
1220         u64 *list;
1221         dma_addr_t page;
1222
1223         /* Alloc dma memory for BDQ buffers */
1224         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1225                 qedi->bdq[i].buf_addr =
1226                                 dma_alloc_coherent(&qedi->pdev->dev,
1227                                                    QEDI_BDQ_BUF_SIZE,
1228                                                    &qedi->bdq[i].buf_dma,
1229                                                    GFP_KERNEL);
1230                 if (!qedi->bdq[i].buf_addr) {
1231                         QEDI_ERR(&qedi->dbg_ctx,
1232                                  "Could not allocate BDQ buffer %d.\n", i);
1233                         return -ENOMEM;
1234                 }
1235         }
1236
1237         /* Alloc dma memory for BDQ page buffer list */
1238         qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1239         qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
1240         qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1241
1242         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1243                   qedi->rq_num_entries);
1244
1245         qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1246                                            qedi->bdq_pbl_mem_size,
1247                                            &qedi->bdq_pbl_dma, GFP_KERNEL);
1248         if (!qedi->bdq_pbl) {
1249                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1250                 return -ENOMEM;
1251         }
1252
1253         /*
1254          * Populate BDQ PBL with physical and virtual address of individual
1255          * BDQ buffers
1256          */
1257         pbl = (struct scsi_bd  *)qedi->bdq_pbl;
1258         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1259                 pbl->address.hi =
1260                                 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1261                 pbl->address.lo =
1262                                 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1263                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1264                           "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1265                           pbl, pbl->address.hi, pbl->address.lo, i);
1266                 pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
1267                 pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
1268                 pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
1269                 pbl->opaque.iscsi_opaque.opaque = cpu_to_le16(i);
1270                 pbl++;
1271         }
1272
1273         /* Allocate list of PBL pages */
1274         qedi->bdq_pbl_list = dma_zalloc_coherent(&qedi->pdev->dev, PAGE_SIZE,
1275                                                  &qedi->bdq_pbl_list_dma,
1276                                                  GFP_KERNEL);
1277         if (!qedi->bdq_pbl_list) {
1278                 QEDI_ERR(&qedi->dbg_ctx,
1279                          "Could not allocate list of PBL pages.\n");
1280                 return -ENOMEM;
1281         }
1282
1283         /*
1284          * Now populate PBL list with pages that contain pointers to the
1285          * individual buffers.
1286          */
1287         qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
1288         list = (u64 *)qedi->bdq_pbl_list;
1289         page = qedi->bdq_pbl_list_dma;
1290         for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1291                 *list = qedi->bdq_pbl_dma;
1292                 list++;
1293                 page += PAGE_SIZE;
1294         }
1295
1296         return 0;
1297 }
1298
1299 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1300 {
1301         u32 *list;
1302         int i;
1303         int status = 0, rc;
1304         u32 *pbl;
1305         dma_addr_t page;
1306         int num_pages;
1307
1308         /*
1309          * Number of global queues (CQ / RQ). This should
1310          * be <= number of available MSIX vectors for the PF
1311          */
1312         if (!qedi->num_queues) {
1313                 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1314                 return 1;
1315         }
1316
1317         /* Make sure we allocated the PBL that will contain the physical
1318          * addresses of our queues
1319          */
1320         if (!qedi->p_cpuq) {
1321                 status = 1;
1322                 goto mem_alloc_failure;
1323         }
1324
1325         qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1326                                        qedi->num_queues), GFP_KERNEL);
1327         if (!qedi->global_queues) {
1328                 QEDI_ERR(&qedi->dbg_ctx,
1329                          "Unable to allocate global queues array ptr memory\n");
1330                 return -ENOMEM;
1331         }
1332         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1333                   "qedi->global_queues=%p.\n", qedi->global_queues);
1334
1335         /* Allocate DMA coherent buffers for BDQ */
1336         rc = qedi_alloc_bdq(qedi);
1337         if (rc)
1338                 goto mem_alloc_failure;
1339
1340         /* Allocate DMA coherent buffers for NVM_ISCSI_CFG */
1341         rc = qedi_alloc_nvm_iscsi_cfg(qedi);
1342         if (rc)
1343                 goto mem_alloc_failure;
1344
1345         /* Allocate a CQ and an associated PBL for each MSI-X
1346          * vector.
1347          */
1348         for (i = 0; i < qedi->num_queues; i++) {
1349                 qedi->global_queues[i] =
1350                                         kzalloc(sizeof(*qedi->global_queues[0]),
1351                                                 GFP_KERNEL);
1352                 if (!qedi->global_queues[i]) {
1353                         QEDI_ERR(&qedi->dbg_ctx,
1354                                  "Unable to allocation global queue %d.\n", i);
1355                         goto mem_alloc_failure;
1356                 }
1357
1358                 qedi->global_queues[i]->cq_mem_size =
1359                     (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1360                 qedi->global_queues[i]->cq_mem_size =
1361                     (qedi->global_queues[i]->cq_mem_size +
1362                     (QEDI_PAGE_SIZE - 1));
1363
1364                 qedi->global_queues[i]->cq_pbl_size =
1365                     (qedi->global_queues[i]->cq_mem_size /
1366                     QEDI_PAGE_SIZE) * sizeof(void *);
1367                 qedi->global_queues[i]->cq_pbl_size =
1368                     (qedi->global_queues[i]->cq_pbl_size +
1369                     (QEDI_PAGE_SIZE - 1));
1370
1371                 qedi->global_queues[i]->cq = dma_zalloc_coherent(&qedi->pdev->dev,
1372                                                                  qedi->global_queues[i]->cq_mem_size,
1373                                                                  &qedi->global_queues[i]->cq_dma,
1374                                                                  GFP_KERNEL);
1375
1376                 if (!qedi->global_queues[i]->cq) {
1377                         QEDI_WARN(&qedi->dbg_ctx,
1378                                   "Could not allocate cq.\n");
1379                         status = -ENOMEM;
1380                         goto mem_alloc_failure;
1381                 }
1382                 qedi->global_queues[i]->cq_pbl = dma_zalloc_coherent(&qedi->pdev->dev,
1383                                                                      qedi->global_queues[i]->cq_pbl_size,
1384                                                                      &qedi->global_queues[i]->cq_pbl_dma,
1385                                                                      GFP_KERNEL);
1386
1387                 if (!qedi->global_queues[i]->cq_pbl) {
1388                         QEDI_WARN(&qedi->dbg_ctx,
1389                                   "Could not allocate cq PBL.\n");
1390                         status = -ENOMEM;
1391                         goto mem_alloc_failure;
1392                 }
1393
1394                 /* Create PBL */
1395                 num_pages = qedi->global_queues[i]->cq_mem_size /
1396                     QEDI_PAGE_SIZE;
1397                 page = qedi->global_queues[i]->cq_dma;
1398                 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1399
1400                 while (num_pages--) {
1401                         *pbl = (u32)page;
1402                         pbl++;
1403                         *pbl = (u32)((u64)page >> 32);
1404                         pbl++;
1405                         page += QEDI_PAGE_SIZE;
1406                 }
1407         }
1408
1409         list = (u32 *)qedi->p_cpuq;
1410
1411         /*
1412          * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1413          * CQ#1 PBL pointer, RQ#1 PBL pointer, etc.  Each PBL pointer points
1414          * to the physical address which contains an array of pointers to the
1415          * physical addresses of the specific queue pages.
1416          */
1417         for (i = 0; i < qedi->num_queues; i++) {
1418                 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1419                 list++;
1420                 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1421                 list++;
1422
1423                 *list = (u32)0;
1424                 list++;
1425                 *list = (u32)((u64)0 >> 32);
1426                 list++;
1427         }
1428
1429         return 0;
1430
1431 mem_alloc_failure:
1432         qedi_free_global_queues(qedi);
1433         return status;
1434 }
1435
1436 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1437 {
1438         int rval = 0;
1439         u32 *pbl;
1440         dma_addr_t page;
1441         int num_pages;
1442
1443         if (!ep)
1444                 return -EIO;
1445
1446         /* Calculate appropriate queue and PBL sizes */
1447         ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1448         ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1449
1450         ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1451         ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1452
1453         ep->sq = dma_zalloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1454                                      &ep->sq_dma, GFP_KERNEL);
1455         if (!ep->sq) {
1456                 QEDI_WARN(&qedi->dbg_ctx,
1457                           "Could not allocate send queue.\n");
1458                 rval = -ENOMEM;
1459                 goto out;
1460         }
1461         ep->sq_pbl = dma_zalloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1462                                          &ep->sq_pbl_dma, GFP_KERNEL);
1463         if (!ep->sq_pbl) {
1464                 QEDI_WARN(&qedi->dbg_ctx,
1465                           "Could not allocate send queue PBL.\n");
1466                 rval = -ENOMEM;
1467                 goto out_free_sq;
1468         }
1469
1470         /* Create PBL */
1471         num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1472         page = ep->sq_dma;
1473         pbl = (u32 *)ep->sq_pbl;
1474
1475         while (num_pages--) {
1476                 *pbl = (u32)page;
1477                 pbl++;
1478                 *pbl = (u32)((u64)page >> 32);
1479                 pbl++;
1480                 page += QEDI_PAGE_SIZE;
1481         }
1482
1483         return rval;
1484
1485 out_free_sq:
1486         dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1487                           ep->sq_dma);
1488 out:
1489         return rval;
1490 }
1491
1492 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1493 {
1494         if (ep->sq_pbl)
1495                 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1496                                   ep->sq_pbl_dma);
1497         if (ep->sq)
1498                 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1499                                   ep->sq_dma);
1500 }
1501
1502 int qedi_get_task_idx(struct qedi_ctx *qedi)
1503 {
1504         s16 tmp_idx;
1505
1506 again:
1507         tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1508                                       MAX_ISCSI_TASK_ENTRIES);
1509
1510         if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1511                 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1512                 tmp_idx = -1;
1513                 goto err_idx;
1514         }
1515
1516         if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1517                 goto again;
1518
1519 err_idx:
1520         return tmp_idx;
1521 }
1522
1523 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1524 {
1525         if (!test_and_clear_bit(idx, qedi->task_idx_map))
1526                 QEDI_ERR(&qedi->dbg_ctx,
1527                          "FW task context, already cleared, tid=0x%x\n", idx);
1528 }
1529
1530 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1531                          struct qedi_cmd *cmd)
1532 {
1533         qedi->itt_map[tid].itt = proto_itt;
1534         qedi->itt_map[tid].p_cmd = cmd;
1535
1536         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1537                   "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1538                   qedi->itt_map[tid].itt);
1539 }
1540
1541 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1542 {
1543         u16 i;
1544
1545         for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1546                 if (qedi->itt_map[i].itt == itt) {
1547                         *tid = i;
1548                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1549                                   "Ref itt=0x%x, found at tid=0x%x\n",
1550                                   itt, *tid);
1551                         return;
1552                 }
1553         }
1554
1555         WARN_ON(1);
1556 }
1557
1558 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1559 {
1560         *proto_itt = qedi->itt_map[tid].itt;
1561         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1562                   "Get itt map tid [0x%x with proto itt[0x%x]",
1563                   tid, *proto_itt);
1564 }
1565
1566 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1567 {
1568         struct qedi_cmd *cmd = NULL;
1569
1570         if (tid >= MAX_ISCSI_TASK_ENTRIES)
1571                 return NULL;
1572
1573         cmd = qedi->itt_map[tid].p_cmd;
1574         if (cmd->task_id != tid)
1575                 return NULL;
1576
1577         qedi->itt_map[tid].p_cmd = NULL;
1578
1579         return cmd;
1580 }
1581
1582 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1583 {
1584         qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1585                                 sizeof(struct qedi_itt_map), GFP_KERNEL);
1586         if (!qedi->itt_map) {
1587                 QEDI_ERR(&qedi->dbg_ctx,
1588                          "Unable to allocate itt map array memory\n");
1589                 return -ENOMEM;
1590         }
1591         return 0;
1592 }
1593
1594 static void qedi_free_itt(struct qedi_ctx *qedi)
1595 {
1596         kfree(qedi->itt_map);
1597 }
1598
1599 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1600         .rx_cb = qedi_ll2_rx,
1601         .tx_cb = NULL,
1602 };
1603
1604 static int qedi_percpu_io_thread(void *arg)
1605 {
1606         struct qedi_percpu_s *p = arg;
1607         struct qedi_work *work, *tmp;
1608         unsigned long flags;
1609         LIST_HEAD(work_list);
1610
1611         set_user_nice(current, -20);
1612
1613         while (!kthread_should_stop()) {
1614                 spin_lock_irqsave(&p->p_work_lock, flags);
1615                 while (!list_empty(&p->work_list)) {
1616                         list_splice_init(&p->work_list, &work_list);
1617                         spin_unlock_irqrestore(&p->p_work_lock, flags);
1618
1619                         list_for_each_entry_safe(work, tmp, &work_list, list) {
1620                                 list_del_init(&work->list);
1621                                 qedi_fp_process_cqes(work);
1622                                 if (!work->is_solicited)
1623                                         kfree(work);
1624                         }
1625                         cond_resched();
1626                         spin_lock_irqsave(&p->p_work_lock, flags);
1627                 }
1628                 set_current_state(TASK_INTERRUPTIBLE);
1629                 spin_unlock_irqrestore(&p->p_work_lock, flags);
1630                 schedule();
1631         }
1632         __set_current_state(TASK_RUNNING);
1633
1634         return 0;
1635 }
1636
1637 static int qedi_cpu_online(unsigned int cpu)
1638 {
1639         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1640         struct task_struct *thread;
1641
1642         thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1643                                         cpu_to_node(cpu),
1644                                         "qedi_thread/%d", cpu);
1645         if (IS_ERR(thread))
1646                 return PTR_ERR(thread);
1647
1648         kthread_bind(thread, cpu);
1649         p->iothread = thread;
1650         wake_up_process(thread);
1651         return 0;
1652 }
1653
1654 static int qedi_cpu_offline(unsigned int cpu)
1655 {
1656         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1657         struct qedi_work *work, *tmp;
1658         struct task_struct *thread;
1659
1660         spin_lock_bh(&p->p_work_lock);
1661         thread = p->iothread;
1662         p->iothread = NULL;
1663
1664         list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1665                 list_del_init(&work->list);
1666                 qedi_fp_process_cqes(work);
1667                 if (!work->is_solicited)
1668                         kfree(work);
1669         }
1670
1671         spin_unlock_bh(&p->p_work_lock);
1672         if (thread)
1673                 kthread_stop(thread);
1674         return 0;
1675 }
1676
1677 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1678 {
1679         struct qed_ll2_params params;
1680
1681         qedi_recover_all_conns(qedi);
1682
1683         qedi_ops->ll2->stop(qedi->cdev);
1684         qedi_ll2_free_skbs(qedi);
1685
1686         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1687                   qedi->ll2_mtu, mtu);
1688         memset(&params, 0, sizeof(params));
1689         qedi->ll2_mtu = mtu;
1690         params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1691         params.drop_ttl0_packets = 0;
1692         params.rx_vlan_stripping = 1;
1693         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1694         qedi_ops->ll2->start(qedi->cdev, &params);
1695 }
1696
1697 /**
1698  * qedi_get_nvram_block: - Scan through the iSCSI NVRAM block (while accounting
1699  * for gaps) for the matching absolute-pf-id of the QEDI device.
1700  */
1701 static struct nvm_iscsi_block *
1702 qedi_get_nvram_block(struct qedi_ctx *qedi)
1703 {
1704         int i;
1705         u8 pf;
1706         u32 flags;
1707         struct nvm_iscsi_block *block;
1708
1709         pf = qedi->dev_info.common.abs_pf_id;
1710         block = &qedi->iscsi_cfg->block[0];
1711         for (i = 0; i < NUM_OF_ISCSI_PF_SUPPORTED; i++, block++) {
1712                 flags = ((block->id) & NVM_ISCSI_CFG_BLK_CTRL_FLAG_MASK) >>
1713                         NVM_ISCSI_CFG_BLK_CTRL_FLAG_OFFSET;
1714                 if (flags & (NVM_ISCSI_CFG_BLK_CTRL_FLAG_IS_NOT_EMPTY |
1715                                 NVM_ISCSI_CFG_BLK_CTRL_FLAG_PF_MAPPED) &&
1716                         (pf == (block->id & NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_MASK)
1717                                 >> NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_OFFSET))
1718                         return block;
1719         }
1720         return NULL;
1721 }
1722
1723 static ssize_t qedi_show_boot_eth_info(void *data, int type, char *buf)
1724 {
1725         struct qedi_ctx *qedi = data;
1726         struct nvm_iscsi_initiator *initiator;
1727         int rc = 1;
1728         u32 ipv6_en, dhcp_en, ip_len;
1729         struct nvm_iscsi_block *block;
1730         char *fmt, *ip, *sub, *gw;
1731
1732         block = qedi_get_nvram_block(qedi);
1733         if (!block)
1734                 return 0;
1735
1736         initiator = &block->initiator;
1737         ipv6_en = block->generic.ctrl_flags &
1738                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
1739         dhcp_en = block->generic.ctrl_flags &
1740                   NVM_ISCSI_CFG_GEN_DHCP_TCPIP_CONFIG_ENABLED;
1741         /* Static IP assignments. */
1742         fmt = ipv6_en ? "%pI6\n" : "%pI4\n";
1743         ip = ipv6_en ? initiator->ipv6.addr.byte : initiator->ipv4.addr.byte;
1744         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
1745         sub = ipv6_en ? initiator->ipv6.subnet_mask.byte :
1746               initiator->ipv4.subnet_mask.byte;
1747         gw = ipv6_en ? initiator->ipv6.gateway.byte :
1748              initiator->ipv4.gateway.byte;
1749         /* DHCP IP adjustments. */
1750         fmt = dhcp_en ? "%s\n" : fmt;
1751         if (dhcp_en) {
1752                 ip = ipv6_en ? "0::0" : "0.0.0.0";
1753                 sub = ip;
1754                 gw = ip;
1755                 ip_len = ipv6_en ? 5 : 8;
1756         }
1757
1758         switch (type) {
1759         case ISCSI_BOOT_ETH_IP_ADDR:
1760                 rc = snprintf(buf, ip_len, fmt, ip);
1761                 break;
1762         case ISCSI_BOOT_ETH_SUBNET_MASK:
1763                 rc = snprintf(buf, ip_len, fmt, sub);
1764                 break;
1765         case ISCSI_BOOT_ETH_GATEWAY:
1766                 rc = snprintf(buf, ip_len, fmt, gw);
1767                 break;
1768         case ISCSI_BOOT_ETH_FLAGS:
1769                 rc = snprintf(buf, 3, "%hhd\n",
1770                               SYSFS_FLAG_FW_SEL_BOOT);
1771                 break;
1772         case ISCSI_BOOT_ETH_INDEX:
1773                 rc = snprintf(buf, 3, "0\n");
1774                 break;
1775         case ISCSI_BOOT_ETH_MAC:
1776                 rc = sysfs_format_mac(buf, qedi->mac, ETH_ALEN);
1777                 break;
1778         case ISCSI_BOOT_ETH_VLAN:
1779                 rc = snprintf(buf, 12, "%d\n",
1780                               GET_FIELD2(initiator->generic_cont0,
1781                                          NVM_ISCSI_CFG_INITIATOR_VLAN));
1782                 break;
1783         case ISCSI_BOOT_ETH_ORIGIN:
1784                 if (dhcp_en)
1785                         rc = snprintf(buf, 3, "3\n");
1786                 break;
1787         default:
1788                 rc = 0;
1789                 break;
1790         }
1791
1792         return rc;
1793 }
1794
1795 static umode_t qedi_eth_get_attr_visibility(void *data, int type)
1796 {
1797         int rc = 1;
1798
1799         switch (type) {
1800         case ISCSI_BOOT_ETH_FLAGS:
1801         case ISCSI_BOOT_ETH_MAC:
1802         case ISCSI_BOOT_ETH_INDEX:
1803         case ISCSI_BOOT_ETH_IP_ADDR:
1804         case ISCSI_BOOT_ETH_SUBNET_MASK:
1805         case ISCSI_BOOT_ETH_GATEWAY:
1806         case ISCSI_BOOT_ETH_ORIGIN:
1807         case ISCSI_BOOT_ETH_VLAN:
1808                 rc = 0444;
1809                 break;
1810         default:
1811                 rc = 0;
1812                 break;
1813         }
1814         return rc;
1815 }
1816
1817 static ssize_t qedi_show_boot_ini_info(void *data, int type, char *buf)
1818 {
1819         struct qedi_ctx *qedi = data;
1820         struct nvm_iscsi_initiator *initiator;
1821         int rc;
1822         struct nvm_iscsi_block *block;
1823
1824         block = qedi_get_nvram_block(qedi);
1825         if (!block)
1826                 return 0;
1827
1828         initiator = &block->initiator;
1829
1830         switch (type) {
1831         case ISCSI_BOOT_INI_INITIATOR_NAME:
1832                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
1833                              initiator->initiator_name.byte);
1834                 break;
1835         default:
1836                 rc = 0;
1837                 break;
1838         }
1839         return rc;
1840 }
1841
1842 static umode_t qedi_ini_get_attr_visibility(void *data, int type)
1843 {
1844         int rc;
1845
1846         switch (type) {
1847         case ISCSI_BOOT_INI_INITIATOR_NAME:
1848                 rc = 0444;
1849                 break;
1850         default:
1851                 rc = 0;
1852                 break;
1853         }
1854         return rc;
1855 }
1856
1857 static ssize_t
1858 qedi_show_boot_tgt_info(struct qedi_ctx *qedi, int type,
1859                         char *buf, enum qedi_nvm_tgts idx)
1860 {
1861         int rc = 1;
1862         u32 ctrl_flags, ipv6_en, chap_en, mchap_en, ip_len;
1863         struct nvm_iscsi_block *block;
1864         char *chap_name, *chap_secret;
1865         char *mchap_name, *mchap_secret;
1866
1867         block = qedi_get_nvram_block(qedi);
1868         if (!block)
1869                 goto exit_show_tgt_info;
1870
1871         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
1872                   "Port:%d, tgt_idx:%d\n",
1873                   GET_FIELD2(block->id, NVM_ISCSI_CFG_BLK_MAPPED_PF_ID), idx);
1874
1875         ctrl_flags = block->target[idx].ctrl_flags &
1876                      NVM_ISCSI_CFG_TARGET_ENABLED;
1877
1878         if (!ctrl_flags) {
1879                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
1880                           "Target disabled\n");
1881                 goto exit_show_tgt_info;
1882         }
1883
1884         ipv6_en = block->generic.ctrl_flags &
1885                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
1886         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
1887         chap_en = block->generic.ctrl_flags &
1888                   NVM_ISCSI_CFG_GEN_CHAP_ENABLED;
1889         chap_name = chap_en ? block->initiator.chap_name.byte : NULL;
1890         chap_secret = chap_en ? block->initiator.chap_password.byte : NULL;
1891
1892         mchap_en = block->generic.ctrl_flags &
1893                   NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED;
1894         mchap_name = mchap_en ? block->target[idx].chap_name.byte : NULL;
1895         mchap_secret = mchap_en ? block->target[idx].chap_password.byte : NULL;
1896
1897         switch (type) {
1898         case ISCSI_BOOT_TGT_NAME:
1899                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
1900                              block->target[idx].target_name.byte);
1901                 break;
1902         case ISCSI_BOOT_TGT_IP_ADDR:
1903                 if (ipv6_en)
1904                         rc = snprintf(buf, ip_len, "%pI6\n",
1905                                       block->target[idx].ipv6_addr.byte);
1906                 else
1907                         rc = snprintf(buf, ip_len, "%pI4\n",
1908                                       block->target[idx].ipv4_addr.byte);
1909                 break;
1910         case ISCSI_BOOT_TGT_PORT:
1911                 rc = snprintf(buf, 12, "%d\n",
1912                               GET_FIELD2(block->target[idx].generic_cont0,
1913                                          NVM_ISCSI_CFG_TARGET_TCP_PORT));
1914                 break;
1915         case ISCSI_BOOT_TGT_LUN:
1916                 rc = snprintf(buf, 22, "%.*d\n",
1917                               block->target[idx].lun.value[1],
1918                               block->target[idx].lun.value[0]);
1919                 break;
1920         case ISCSI_BOOT_TGT_CHAP_NAME:
1921                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
1922                              chap_name);
1923                 break;
1924         case ISCSI_BOOT_TGT_CHAP_SECRET:
1925                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
1926                              chap_secret);
1927                 break;
1928         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
1929                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
1930                              mchap_name);
1931                 break;
1932         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
1933                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
1934                              mchap_secret);
1935                 break;
1936         case ISCSI_BOOT_TGT_FLAGS:
1937                 rc = snprintf(buf, 3, "%hhd\n", SYSFS_FLAG_FW_SEL_BOOT);
1938                 break;
1939         case ISCSI_BOOT_TGT_NIC_ASSOC:
1940                 rc = snprintf(buf, 3, "0\n");
1941                 break;
1942         default:
1943                 rc = 0;
1944                 break;
1945         }
1946
1947 exit_show_tgt_info:
1948         return rc;
1949 }
1950
1951 static ssize_t qedi_show_boot_tgt_pri_info(void *data, int type, char *buf)
1952 {
1953         struct qedi_ctx *qedi = data;
1954
1955         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_PRI);
1956 }
1957
1958 static ssize_t qedi_show_boot_tgt_sec_info(void *data, int type, char *buf)
1959 {
1960         struct qedi_ctx *qedi = data;
1961
1962         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_SEC);
1963 }
1964
1965 static umode_t qedi_tgt_get_attr_visibility(void *data, int type)
1966 {
1967         int rc;
1968
1969         switch (type) {
1970         case ISCSI_BOOT_TGT_NAME:
1971         case ISCSI_BOOT_TGT_IP_ADDR:
1972         case ISCSI_BOOT_TGT_PORT:
1973         case ISCSI_BOOT_TGT_LUN:
1974         case ISCSI_BOOT_TGT_CHAP_NAME:
1975         case ISCSI_BOOT_TGT_CHAP_SECRET:
1976         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
1977         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
1978         case ISCSI_BOOT_TGT_NIC_ASSOC:
1979         case ISCSI_BOOT_TGT_FLAGS:
1980                 rc = 0444;
1981                 break;
1982         default:
1983                 rc = 0;
1984                 break;
1985         }
1986         return rc;
1987 }
1988
1989 static void qedi_boot_release(void *data)
1990 {
1991         struct qedi_ctx *qedi = data;
1992
1993         scsi_host_put(qedi->shost);
1994 }
1995
1996 static int qedi_get_boot_info(struct qedi_ctx *qedi)
1997 {
1998         int ret = 1;
1999         u16 len;
2000
2001         len = sizeof(struct nvm_iscsi_cfg);
2002
2003         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2004                   "Get NVM iSCSI CFG image\n");
2005         ret = qedi_ops->common->nvm_get_image(qedi->cdev,
2006                                               QED_NVM_IMAGE_ISCSI_CFG,
2007                                               (char *)qedi->iscsi_cfg, len);
2008         if (ret)
2009                 QEDI_ERR(&qedi->dbg_ctx,
2010                          "Could not get NVM image. ret = %d\n", ret);
2011
2012         return ret;
2013 }
2014
2015 static int qedi_setup_boot_info(struct qedi_ctx *qedi)
2016 {
2017         struct iscsi_boot_kobj *boot_kobj;
2018
2019         if (qedi_get_boot_info(qedi))
2020                 return -EPERM;
2021
2022         qedi->boot_kset = iscsi_boot_create_host_kset(qedi->shost->host_no);
2023         if (!qedi->boot_kset)
2024                 goto kset_free;
2025
2026         if (!scsi_host_get(qedi->shost))
2027                 goto kset_free;
2028
2029         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 0, qedi,
2030                                              qedi_show_boot_tgt_pri_info,
2031                                              qedi_tgt_get_attr_visibility,
2032                                              qedi_boot_release);
2033         if (!boot_kobj)
2034                 goto put_host;
2035
2036         if (!scsi_host_get(qedi->shost))
2037                 goto kset_free;
2038
2039         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 1, qedi,
2040                                              qedi_show_boot_tgt_sec_info,
2041                                              qedi_tgt_get_attr_visibility,
2042                                              qedi_boot_release);
2043         if (!boot_kobj)
2044                 goto put_host;
2045
2046         if (!scsi_host_get(qedi->shost))
2047                 goto kset_free;
2048
2049         boot_kobj = iscsi_boot_create_initiator(qedi->boot_kset, 0, qedi,
2050                                                 qedi_show_boot_ini_info,
2051                                                 qedi_ini_get_attr_visibility,
2052                                                 qedi_boot_release);
2053         if (!boot_kobj)
2054                 goto put_host;
2055
2056         if (!scsi_host_get(qedi->shost))
2057                 goto kset_free;
2058
2059         boot_kobj = iscsi_boot_create_ethernet(qedi->boot_kset, 0, qedi,
2060                                                qedi_show_boot_eth_info,
2061                                                qedi_eth_get_attr_visibility,
2062                                                qedi_boot_release);
2063         if (!boot_kobj)
2064                 goto put_host;
2065
2066         return 0;
2067
2068 put_host:
2069         scsi_host_put(qedi->shost);
2070 kset_free:
2071         iscsi_boot_destroy_kset(qedi->boot_kset);
2072         return -ENOMEM;
2073 }
2074
2075 static void __qedi_remove(struct pci_dev *pdev, int mode)
2076 {
2077         struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2078
2079         if (qedi->tmf_thread) {
2080                 flush_workqueue(qedi->tmf_thread);
2081                 destroy_workqueue(qedi->tmf_thread);
2082                 qedi->tmf_thread = NULL;
2083         }
2084
2085         if (qedi->offload_thread) {
2086                 flush_workqueue(qedi->offload_thread);
2087                 destroy_workqueue(qedi->offload_thread);
2088                 qedi->offload_thread = NULL;
2089         }
2090
2091 #ifdef CONFIG_DEBUG_FS
2092         qedi_dbg_host_exit(&qedi->dbg_ctx);
2093 #endif
2094         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
2095                 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2096
2097         qedi_sync_free_irqs(qedi);
2098
2099         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2100                 qedi_ops->stop(qedi->cdev);
2101                 qedi_ops->ll2->stop(qedi->cdev);
2102         }
2103
2104         if (mode == QEDI_MODE_NORMAL)
2105                 qedi_free_iscsi_pf_param(qedi);
2106
2107         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2108                 qedi_ops->common->slowpath_stop(qedi->cdev);
2109                 qedi_ops->common->remove(qedi->cdev);
2110         }
2111
2112         qedi_destroy_fp(qedi);
2113
2114         if (mode == QEDI_MODE_NORMAL) {
2115                 qedi_release_cid_que(qedi);
2116                 qedi_cm_free_mem(qedi);
2117                 qedi_free_uio(qedi->udev);
2118                 qedi_free_itt(qedi);
2119
2120                 iscsi_host_remove(qedi->shost);
2121                 iscsi_host_free(qedi->shost);
2122
2123                 if (qedi->ll2_recv_thread) {
2124                         kthread_stop(qedi->ll2_recv_thread);
2125                         qedi->ll2_recv_thread = NULL;
2126                 }
2127                 qedi_ll2_free_skbs(qedi);
2128
2129                 if (qedi->boot_kset)
2130                         iscsi_boot_destroy_kset(qedi->boot_kset);
2131         }
2132 }
2133
2134 static int __qedi_probe(struct pci_dev *pdev, int mode)
2135 {
2136         struct qedi_ctx *qedi;
2137         struct qed_ll2_params params;
2138         u32 dp_module = 0;
2139         u8 dp_level = 0;
2140         bool is_vf = false;
2141         char host_buf[16];
2142         struct qed_link_params link_params;
2143         struct qed_slowpath_params sp_params;
2144         struct qed_probe_params qed_params;
2145         void *task_start, *task_end;
2146         int rc;
2147         u16 tmp;
2148
2149         if (mode != QEDI_MODE_RECOVERY) {
2150                 qedi = qedi_host_alloc(pdev);
2151                 if (!qedi) {
2152                         rc = -ENOMEM;
2153                         goto exit_probe;
2154                 }
2155         } else {
2156                 qedi = pci_get_drvdata(pdev);
2157         }
2158
2159         memset(&qed_params, 0, sizeof(qed_params));
2160         qed_params.protocol = QED_PROTOCOL_ISCSI;
2161         qed_params.dp_module = dp_module;
2162         qed_params.dp_level = dp_level;
2163         qed_params.is_vf = is_vf;
2164         qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
2165         if (!qedi->cdev) {
2166                 rc = -ENODEV;
2167                 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
2168                 goto free_host;
2169         }
2170
2171         atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2172
2173         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2174         if (rc)
2175                 goto free_host;
2176
2177         if (mode != QEDI_MODE_RECOVERY) {
2178                 rc = qedi_set_iscsi_pf_param(qedi);
2179                 if (rc) {
2180                         rc = -ENOMEM;
2181                         QEDI_ERR(&qedi->dbg_ctx,
2182                                  "Set iSCSI pf param fail\n");
2183                         goto free_host;
2184                 }
2185         }
2186
2187         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2188
2189         rc = qedi_prepare_fp(qedi);
2190         if (rc) {
2191                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
2192                 goto free_pf_params;
2193         }
2194
2195         /* Start the Slowpath-process */
2196         memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
2197         sp_params.int_mode = QED_INT_MODE_MSIX;
2198         sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
2199         sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
2200         sp_params.drv_rev = QEDI_DRIVER_REV_VER;
2201         sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
2202         strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
2203         rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
2204         if (rc) {
2205                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
2206                 goto stop_hw;
2207         }
2208
2209         /* update_pf_params needs to be called before and after slowpath
2210          * start
2211          */
2212         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2213
2214         rc = qedi_setup_int(qedi);
2215         if (rc)
2216                 goto stop_iscsi_func;
2217
2218         qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2219
2220         /* Learn information crucial for qedi to progress */
2221         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2222         if (rc)
2223                 goto stop_iscsi_func;
2224
2225         /* Record BDQ producer doorbell addresses */
2226         qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
2227         qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
2228         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2229                   "BDQ primary_prod=%p secondary_prod=%p.\n",
2230                   qedi->bdq_primary_prod,
2231                   qedi->bdq_secondary_prod);
2232
2233         /*
2234          * We need to write the number of BDs in the BDQ we've preallocated so
2235          * the f/w will do a prefetch and we'll get an unsolicited CQE when a
2236          * packet arrives.
2237          */
2238         qedi->bdq_prod_idx = QEDI_BDQ_NUM;
2239         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2240                   "Writing %d to primary and secondary BDQ doorbell registers.\n",
2241                   qedi->bdq_prod_idx);
2242         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
2243         tmp = readw(qedi->bdq_primary_prod);
2244         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
2245         tmp = readw(qedi->bdq_secondary_prod);
2246
2247         ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
2248         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
2249                   qedi->mac);
2250
2251         sprintf(host_buf, "host_%d", qedi->shost->host_no);
2252         qedi_ops->common->set_name(qedi->cdev, host_buf);
2253
2254         qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
2255
2256         memset(&params, 0, sizeof(params));
2257         params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
2258         qedi->ll2_mtu = DEF_PATH_MTU;
2259         params.drop_ttl0_packets = 0;
2260         params.rx_vlan_stripping = 1;
2261         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
2262
2263         if (mode != QEDI_MODE_RECOVERY) {
2264                 /* set up rx path */
2265                 INIT_LIST_HEAD(&qedi->ll2_skb_list);
2266                 spin_lock_init(&qedi->ll2_lock);
2267                 /* start qedi context */
2268                 spin_lock_init(&qedi->hba_lock);
2269                 spin_lock_init(&qedi->task_idx_lock);
2270         }
2271         qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
2272         qedi_ops->ll2->start(qedi->cdev, &params);
2273
2274         if (mode != QEDI_MODE_RECOVERY) {
2275                 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
2276                                                     (void *)qedi,
2277                                                     "qedi_ll2_thread");
2278         }
2279
2280         rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
2281                              qedi, qedi_iscsi_event_cb);
2282         if (rc) {
2283                 rc = -ENODEV;
2284                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
2285                 goto stop_slowpath;
2286         }
2287
2288         task_start = qedi_get_task_mem(&qedi->tasks, 0);
2289         task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
2290         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2291                   "Task context start=%p, end=%p block_size=%u.\n",
2292                    task_start, task_end, qedi->tasks.size);
2293
2294         memset(&link_params, 0, sizeof(link_params));
2295         link_params.link_up = true;
2296         rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
2297         if (rc) {
2298                 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
2299                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2300         }
2301
2302 #ifdef CONFIG_DEBUG_FS
2303         qedi_dbg_host_init(&qedi->dbg_ctx, &qedi_debugfs_ops,
2304                            &qedi_dbg_fops);
2305 #endif
2306         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2307                   "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
2308                   QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
2309                   FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
2310
2311         if (mode == QEDI_MODE_NORMAL) {
2312                 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
2313                         QEDI_ERR(&qedi->dbg_ctx,
2314                                  "Could not add iscsi host\n");
2315                         rc = -ENOMEM;
2316                         goto remove_host;
2317                 }
2318
2319                 /* Allocate uio buffers */
2320                 rc = qedi_alloc_uio_rings(qedi);
2321                 if (rc) {
2322                         QEDI_ERR(&qedi->dbg_ctx,
2323                                  "UIO alloc ring failed err=%d\n", rc);
2324                         goto remove_host;
2325                 }
2326
2327                 rc = qedi_init_uio(qedi);
2328                 if (rc) {
2329                         QEDI_ERR(&qedi->dbg_ctx,
2330                                  "UIO init failed, err=%d\n", rc);
2331                         goto free_uio;
2332                 }
2333
2334                 /* host the array on iscsi_conn */
2335                 rc = qedi_setup_cid_que(qedi);
2336                 if (rc) {
2337                         QEDI_ERR(&qedi->dbg_ctx,
2338                                  "Could not setup cid que\n");
2339                         goto free_uio;
2340                 }
2341
2342                 rc = qedi_cm_alloc_mem(qedi);
2343                 if (rc) {
2344                         QEDI_ERR(&qedi->dbg_ctx,
2345                                  "Could not alloc cm memory\n");
2346                         goto free_cid_que;
2347                 }
2348
2349                 rc = qedi_alloc_itt(qedi);
2350                 if (rc) {
2351                         QEDI_ERR(&qedi->dbg_ctx,
2352                                  "Could not alloc itt memory\n");
2353                         goto free_cid_que;
2354                 }
2355
2356                 sprintf(host_buf, "host_%d", qedi->shost->host_no);
2357                 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
2358                 if (!qedi->tmf_thread) {
2359                         QEDI_ERR(&qedi->dbg_ctx,
2360                                  "Unable to start tmf thread!\n");
2361                         rc = -ENODEV;
2362                         goto free_cid_que;
2363                 }
2364
2365                 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
2366                 qedi->offload_thread = create_workqueue(host_buf);
2367                 if (!qedi->offload_thread) {
2368                         QEDI_ERR(&qedi->dbg_ctx,
2369                                  "Unable to start offload thread!\n");
2370                         rc = -ENODEV;
2371                         goto free_cid_que;
2372                 }
2373
2374                 /* F/w needs 1st task context memory entry for performance */
2375                 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
2376                 atomic_set(&qedi->num_offloads, 0);
2377
2378                 if (qedi_setup_boot_info(qedi))
2379                         QEDI_ERR(&qedi->dbg_ctx,
2380                                  "No iSCSI boot target configured\n");
2381         }
2382
2383         return 0;
2384
2385 free_cid_que:
2386         qedi_release_cid_que(qedi);
2387 free_uio:
2388         qedi_free_uio(qedi->udev);
2389 remove_host:
2390 #ifdef CONFIG_DEBUG_FS
2391         qedi_dbg_host_exit(&qedi->dbg_ctx);
2392 #endif
2393         iscsi_host_remove(qedi->shost);
2394 stop_iscsi_func:
2395         qedi_ops->stop(qedi->cdev);
2396 stop_slowpath:
2397         qedi_ops->common->slowpath_stop(qedi->cdev);
2398 stop_hw:
2399         qedi_ops->common->remove(qedi->cdev);
2400 free_pf_params:
2401         qedi_free_iscsi_pf_param(qedi);
2402 free_host:
2403         iscsi_host_free(qedi->shost);
2404 exit_probe:
2405         return rc;
2406 }
2407
2408 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2409 {
2410         return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2411 }
2412
2413 static void qedi_remove(struct pci_dev *pdev)
2414 {
2415         __qedi_remove(pdev, QEDI_MODE_NORMAL);
2416 }
2417
2418 static struct pci_device_id qedi_pci_tbl[] = {
2419         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2420         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
2421         { 0 },
2422 };
2423 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2424
2425 static enum cpuhp_state qedi_cpuhp_state;
2426
2427 static struct pci_driver qedi_pci_driver = {
2428         .name = QEDI_MODULE_NAME,
2429         .id_table = qedi_pci_tbl,
2430         .probe = qedi_probe,
2431         .remove = qedi_remove,
2432 };
2433
2434 static int __init qedi_init(void)
2435 {
2436         struct qedi_percpu_s *p;
2437         int cpu, rc = 0;
2438
2439         qedi_ops = qed_get_iscsi_ops();
2440         if (!qedi_ops) {
2441                 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2442                 return -EINVAL;
2443         }
2444
2445 #ifdef CONFIG_DEBUG_FS
2446         qedi_dbg_init("qedi");
2447 #endif
2448
2449         qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2450         if (!qedi_scsi_transport) {
2451                 QEDI_ERR(NULL, "Could not register qedi transport");
2452                 rc = -ENOMEM;
2453                 goto exit_qedi_init_1;
2454         }
2455
2456         for_each_possible_cpu(cpu) {
2457                 p = &per_cpu(qedi_percpu, cpu);
2458                 INIT_LIST_HEAD(&p->work_list);
2459                 spin_lock_init(&p->p_work_lock);
2460                 p->iothread = NULL;
2461         }
2462
2463         rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2464                                qedi_cpu_online, qedi_cpu_offline);
2465         if (rc < 0)
2466                 goto exit_qedi_init_2;
2467         qedi_cpuhp_state = rc;
2468
2469         rc = pci_register_driver(&qedi_pci_driver);
2470         if (rc) {
2471                 QEDI_ERR(NULL, "Failed to register driver\n");
2472                 goto exit_qedi_hp;
2473         }
2474
2475         return 0;
2476
2477 exit_qedi_hp:
2478         cpuhp_remove_state(qedi_cpuhp_state);
2479 exit_qedi_init_2:
2480         iscsi_unregister_transport(&qedi_iscsi_transport);
2481 exit_qedi_init_1:
2482 #ifdef CONFIG_DEBUG_FS
2483         qedi_dbg_exit();
2484 #endif
2485         qed_put_iscsi_ops();
2486         return rc;
2487 }
2488
2489 static void __exit qedi_cleanup(void)
2490 {
2491         pci_unregister_driver(&qedi_pci_driver);
2492         cpuhp_remove_state(qedi_cpuhp_state);
2493         iscsi_unregister_transport(&qedi_iscsi_transport);
2494
2495 #ifdef CONFIG_DEBUG_FS
2496         qedi_dbg_exit();
2497 #endif
2498         qed_put_iscsi_ops();
2499 }
2500
2501 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2502 MODULE_LICENSE("GPL");
2503 MODULE_AUTHOR("QLogic Corporation");
2504 MODULE_VERSION(QEDI_MODULE_VERSION);
2505 module_init(qedi_init);
2506 module_exit(qedi_cleanup);