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 async_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 async_data *)fw_handle;
  76         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  77                   "cid=0x%x tid=0x%x err-code=0x%x fw-dbg-param=0x%x\n",
  78                    data->cid, data->itid, data->error_code,
  79                    data->fw_debug_param);
  80
  81         qedi_ep = qedi->ep_tbl[data->cid];
  82
  83         if (!qedi_ep) {
  84                 QEDI_WARN(&qedi->dbg_ctx,
  85                           "Cannot process event, ep already disconnected, cid=0x%x\n",
  86                            data->cid);
  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 *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), &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         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "Min number of MSIX %d\n",
 798                   MIN_NUM_CPUS_MSIX(qedi));
 799
 800         num_sq_pages = (MAX_OUSTANDING_TASKS_PER_CON * 8) / PAGE_SIZE;
 801
 802         qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
 803
 804         memset(&qedi->pf_params.iscsi_pf_params, 0,
 805                sizeof(qedi->pf_params.iscsi_pf_params));
 806
 807         qedi->p_cpuq = pci_alloc_consistent(qedi->pdev,
 808                         qedi->num_queues * sizeof(struct qedi_glbl_q_params),
 809                         &qedi->hw_p_cpuq);
 810         if (!qedi->p_cpuq) {
 811                 QEDI_ERR(&qedi->dbg_ctx, "pci_alloc_consistent fail\n");
 812                 rval = -1;
 813                 goto err_alloc_mem;
 814         }
 815
 816         rval = qedi_alloc_global_queues(qedi);
 817         if (rval) {
 818                 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
 819                 rval = -1;
 820                 goto err_alloc_mem;
 821         }
 822
 823         qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
 824         qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
 825         qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
 826         qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
 827         qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
 828         qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
 829         qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
 830         qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
 831         qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000;
 832         qedi->pf_params.iscsi_pf_params.max_fin_rt = 2;
 833
 834         for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
 835                 if ((1 << log_page_size) == PAGE_SIZE)
 836                         break;
 837         }
 838         qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
 839
 840         qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
 841                                                            (u64)qedi->hw_p_cpuq;
 842
 843         /* RQ BDQ initializations.
 844          * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
 845          * rqe_log_size: 8 for 256B RQE
 846          */
 847         qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
 848         /* BDQ address and size */
 849         qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
 850                                                         qedi->bdq_pbl_list_dma;
 851         qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
 852                                                 qedi->bdq_pbl_list_num_entries;
 853         qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
 854
 855         /* cq_num_entries: num_tasks + rq_num_entries */
 856         qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
 857
 858         qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
 859         qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
 860         qedi->pf_params.iscsi_pf_params.ooo_enable = 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 *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                         continue;
1001
1002                 que->cq_cons_idx++;
1003                 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1004                         que->cq_cons_idx = 0;
1005         }
1006         wake_up_process(p->iothread);
1007         spin_unlock_irqrestore(&p->p_work_lock, flags);
1008
1009         return true;
1010 }
1011
1012 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1013 {
1014         struct qedi_ctx *qedi = fp->qedi;
1015         struct global_queue *que;
1016         struct qed_sb_info *sb_info = fp->sb_info;
1017         struct status_block *sb = sb_info->sb_virt;
1018         u16 prod_idx;
1019
1020         barrier();
1021
1022         /* Get the current firmware producer index */
1023         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1024
1025         /* Get the pointer to the global CQ this completion is on */
1026         que = qedi->global_queues[fp->sb_id];
1027
1028         /* prod idx wrap around uint16 */
1029         if (prod_idx >= QEDI_CQ_SIZE)
1030                 prod_idx = prod_idx % QEDI_CQ_SIZE;
1031
1032         return (que->cq_cons_idx != prod_idx);
1033 }
1034
1035 /* MSI-X fastpath handler code */
1036 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1037 {
1038         struct qedi_fastpath *fp = dev_id;
1039         struct qedi_ctx *qedi = fp->qedi;
1040         bool wake_io_thread = true;
1041
1042         qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1043
1044 process_again:
1045         wake_io_thread = qedi_process_completions(fp);
1046         if (wake_io_thread) {
1047                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1048                           "process already running\n");
1049         }
1050
1051         if (qedi_fp_has_work(fp) == 0)
1052                 qed_sb_update_sb_idx(fp->sb_info);
1053
1054         /* Check for more work */
1055         rmb();
1056
1057         if (qedi_fp_has_work(fp) == 0)
1058                 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1059         else
1060                 goto process_again;
1061
1062         return IRQ_HANDLED;
1063 }
1064
1065 /* simd handler for MSI/INTa */
1066 static void qedi_simd_int_handler(void *cookie)
1067 {
1068         /* Cookie is qedi_ctx struct */
1069         struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1070
1071         QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1072 }
1073
1074 #define QEDI_SIMD_HANDLER_NUM           0
1075 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1076 {
1077         int i;
1078
1079         if (qedi->int_info.msix_cnt) {
1080                 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1081                         synchronize_irq(qedi->int_info.msix[i].vector);
1082                         irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1083                                               NULL);
1084                         free_irq(qedi->int_info.msix[i].vector,
1085                                  &qedi->fp_array[i]);
1086                 }
1087         } else {
1088                 qedi_ops->common->simd_handler_clean(qedi->cdev,
1089                                                      QEDI_SIMD_HANDLER_NUM);
1090         }
1091
1092         qedi->int_info.used_cnt = 0;
1093         qedi_ops->common->set_fp_int(qedi->cdev, 0);
1094 }
1095
1096 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1097 {
1098         int i, rc, cpu;
1099
1100         cpu = cpumask_first(cpu_online_mask);
1101         for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
1102                 rc = request_irq(qedi->int_info.msix[i].vector,
1103                                  qedi_msix_handler, 0, "qedi",
1104                                  &qedi->fp_array[i]);
1105
1106                 if (rc) {
1107                         QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1108                         qedi_sync_free_irqs(qedi);
1109                         return rc;
1110                 }
1111                 qedi->int_info.used_cnt++;
1112                 rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1113                                            get_cpu_mask(cpu));
1114                 cpu = cpumask_next(cpu, cpu_online_mask);
1115         }
1116
1117         return 0;
1118 }
1119
1120 static int qedi_setup_int(struct qedi_ctx *qedi)
1121 {
1122         int rc = 0;
1123
1124         rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1125         rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1126         if (rc)
1127                 goto exit_setup_int;
1128
1129         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1130                   "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1131                    qedi->int_info.msix_cnt, num_online_cpus());
1132
1133         if (qedi->int_info.msix_cnt) {
1134                 rc = qedi_request_msix_irq(qedi);
1135                 goto exit_setup_int;
1136         } else {
1137                 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1138                                                       QEDI_SIMD_HANDLER_NUM,
1139                                                       qedi_simd_int_handler);
1140                 qedi->int_info.used_cnt = 1;
1141         }
1142
1143 exit_setup_int:
1144         return rc;
1145 }
1146
1147 static void qedi_free_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1148 {
1149         if (qedi->iscsi_cfg)
1150                 dma_free_coherent(&qedi->pdev->dev,
1151                                   sizeof(struct nvm_iscsi_cfg),
1152                                   qedi->iscsi_cfg, qedi->nvm_buf_dma);
1153 }
1154
1155 static int qedi_alloc_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1156 {
1157         qedi->iscsi_cfg = dma_zalloc_coherent(&qedi->pdev->dev,
1158                                              sizeof(struct nvm_iscsi_cfg),
1159                                              &qedi->nvm_buf_dma, GFP_KERNEL);
1160         if (!qedi->iscsi_cfg) {
1161                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate NVM BUF.\n");
1162                 return -ENOMEM;
1163         }
1164         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1165                   "NVM BUF addr=0x%p dma=0x%llx.\n", qedi->iscsi_cfg,
1166                   qedi->nvm_buf_dma);
1167
1168         return 0;
1169 }
1170
1171 static void qedi_free_bdq(struct qedi_ctx *qedi)
1172 {
1173         int i;
1174
1175         if (qedi->bdq_pbl_list)
1176                 dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
1177                                   qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1178
1179         if (qedi->bdq_pbl)
1180                 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1181                                   qedi->bdq_pbl, qedi->bdq_pbl_dma);
1182
1183         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1184                 if (qedi->bdq[i].buf_addr) {
1185                         dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1186                                           qedi->bdq[i].buf_addr,
1187                                           qedi->bdq[i].buf_dma);
1188                 }
1189         }
1190 }
1191
1192 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1193 {
1194         int i;
1195         struct global_queue **gl = qedi->global_queues;
1196
1197         for (i = 0; i < qedi->num_queues; i++) {
1198                 if (!gl[i])
1199                         continue;
1200
1201                 if (gl[i]->cq)
1202                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1203                                           gl[i]->cq, gl[i]->cq_dma);
1204                 if (gl[i]->cq_pbl)
1205                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1206                                           gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1207
1208                 kfree(gl[i]);
1209         }
1210         qedi_free_bdq(qedi);
1211         qedi_free_nvm_iscsi_cfg(qedi);
1212 }
1213
1214 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1215 {
1216         int i;
1217         struct scsi_bd *pbl;
1218         u64 *list;
1219         dma_addr_t page;
1220
1221         /* Alloc dma memory for BDQ buffers */
1222         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1223                 qedi->bdq[i].buf_addr =
1224                                 dma_alloc_coherent(&qedi->pdev->dev,
1225                                                    QEDI_BDQ_BUF_SIZE,
1226                                                    &qedi->bdq[i].buf_dma,
1227                                                    GFP_KERNEL);
1228                 if (!qedi->bdq[i].buf_addr) {
1229                         QEDI_ERR(&qedi->dbg_ctx,
1230                                  "Could not allocate BDQ buffer %d.\n", i);
1231                         return -ENOMEM;
1232                 }
1233         }
1234
1235         /* Alloc dma memory for BDQ page buffer list */
1236         qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1237         qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
1238         qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1239
1240         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1241                   qedi->rq_num_entries);
1242
1243         qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1244                                            qedi->bdq_pbl_mem_size,
1245                                            &qedi->bdq_pbl_dma, GFP_KERNEL);
1246         if (!qedi->bdq_pbl) {
1247                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1248                 return -ENOMEM;
1249         }
1250
1251         /*
1252          * Populate BDQ PBL with physical and virtual address of individual
1253          * BDQ buffers
1254          */
1255         pbl = (struct scsi_bd  *)qedi->bdq_pbl;
1256         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1257                 pbl->address.hi =
1258                                 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1259                 pbl->address.lo =
1260                                 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1261                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1262                           "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1263                           pbl, pbl->address.hi, pbl->address.lo, i);
1264                 pbl->opaque.hi = 0;
1265                 pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(i));
1266                 pbl++;
1267         }
1268
1269         /* Allocate list of PBL pages */
1270         qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev,
1271                                                 PAGE_SIZE,
1272                                                 &qedi->bdq_pbl_list_dma,
1273                                                 GFP_KERNEL);
1274         if (!qedi->bdq_pbl_list) {
1275                 QEDI_ERR(&qedi->dbg_ctx,
1276                          "Could not allocate list of PBL pages.\n");
1277                 return -ENOMEM;
1278         }
1279         memset(qedi->bdq_pbl_list, 0, PAGE_SIZE);
1280
1281         /*
1282          * Now populate PBL list with pages that contain pointers to the
1283          * individual buffers.
1284          */
1285         qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
1286         list = (u64 *)qedi->bdq_pbl_list;
1287         page = qedi->bdq_pbl_list_dma;
1288         for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1289                 *list = qedi->bdq_pbl_dma;
1290                 list++;
1291                 page += PAGE_SIZE;
1292         }
1293
1294         return 0;
1295 }
1296
1297 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1298 {
1299         u32 *list;
1300         int i;
1301         int status = 0, rc;
1302         u32 *pbl;
1303         dma_addr_t page;
1304         int num_pages;
1305
1306         /*
1307          * Number of global queues (CQ / RQ). This should
1308          * be <= number of available MSIX vectors for the PF
1309          */
1310         if (!qedi->num_queues) {
1311                 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1312                 return 1;
1313         }
1314
1315         /* Make sure we allocated the PBL that will contain the physical
1316          * addresses of our queues
1317          */
1318         if (!qedi->p_cpuq) {
1319                 status = 1;
1320                 goto mem_alloc_failure;
1321         }
1322
1323         qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1324                                        qedi->num_queues), GFP_KERNEL);
1325         if (!qedi->global_queues) {
1326                 QEDI_ERR(&qedi->dbg_ctx,
1327                          "Unable to allocate global queues array ptr memory\n");
1328                 return -ENOMEM;
1329         }
1330         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1331                   "qedi->global_queues=%p.\n", qedi->global_queues);
1332
1333         /* Allocate DMA coherent buffers for BDQ */
1334         rc = qedi_alloc_bdq(qedi);
1335         if (rc)
1336                 goto mem_alloc_failure;
1337
1338         /* Allocate DMA coherent buffers for NVM_ISCSI_CFG */
1339         rc = qedi_alloc_nvm_iscsi_cfg(qedi);
1340         if (rc)
1341                 goto mem_alloc_failure;
1342
1343         /* Allocate a CQ and an associated PBL for each MSI-X
1344          * vector.
1345          */
1346         for (i = 0; i < qedi->num_queues; i++) {
1347                 qedi->global_queues[i] =
1348                                         kzalloc(sizeof(*qedi->global_queues[0]),
1349                                                 GFP_KERNEL);
1350                 if (!qedi->global_queues[i]) {
1351                         QEDI_ERR(&qedi->dbg_ctx,
1352                                  "Unable to allocation global queue %d.\n", i);
1353                         goto mem_alloc_failure;
1354                 }
1355
1356                 qedi->global_queues[i]->cq_mem_size =
1357                     (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1358                 qedi->global_queues[i]->cq_mem_size =
1359                     (qedi->global_queues[i]->cq_mem_size +
1360                     (QEDI_PAGE_SIZE - 1));
1361
1362                 qedi->global_queues[i]->cq_pbl_size =
1363                     (qedi->global_queues[i]->cq_mem_size /
1364                     QEDI_PAGE_SIZE) * sizeof(void *);
1365                 qedi->global_queues[i]->cq_pbl_size =
1366                     (qedi->global_queues[i]->cq_pbl_size +
1367                     (QEDI_PAGE_SIZE - 1));
1368
1369                 qedi->global_queues[i]->cq =
1370                     dma_alloc_coherent(&qedi->pdev->dev,
1371                                        qedi->global_queues[i]->cq_mem_size,
1372                                        &qedi->global_queues[i]->cq_dma,
1373                                        GFP_KERNEL);
1374
1375                 if (!qedi->global_queues[i]->cq) {
1376                         QEDI_WARN(&qedi->dbg_ctx,
1377                                   "Could not allocate cq.\n");
1378                         status = -ENOMEM;
1379                         goto mem_alloc_failure;
1380                 }
1381                 memset(qedi->global_queues[i]->cq, 0,
1382                        qedi->global_queues[i]->cq_mem_size);
1383
1384                 qedi->global_queues[i]->cq_pbl =
1385                     dma_alloc_coherent(&qedi->pdev->dev,
1386                                        qedi->global_queues[i]->cq_pbl_size,
1387                                        &qedi->global_queues[i]->cq_pbl_dma,
1388                                        GFP_KERNEL);
1389
1390                 if (!qedi->global_queues[i]->cq_pbl) {
1391                         QEDI_WARN(&qedi->dbg_ctx,
1392                                   "Could not allocate cq PBL.\n");
1393                         status = -ENOMEM;
1394                         goto mem_alloc_failure;
1395                 }
1396                 memset(qedi->global_queues[i]->cq_pbl, 0,
1397                        qedi->global_queues[i]->cq_pbl_size);
1398
1399                 /* Create PBL */
1400                 num_pages = qedi->global_queues[i]->cq_mem_size /
1401                     QEDI_PAGE_SIZE;
1402                 page = qedi->global_queues[i]->cq_dma;
1403                 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1404
1405                 while (num_pages--) {
1406                         *pbl = (u32)page;
1407                         pbl++;
1408                         *pbl = (u32)((u64)page >> 32);
1409                         pbl++;
1410                         page += QEDI_PAGE_SIZE;
1411                 }
1412         }
1413
1414         list = (u32 *)qedi->p_cpuq;
1415
1416         /*
1417          * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1418          * CQ#1 PBL pointer, RQ#1 PBL pointer, etc.  Each PBL pointer points
1419          * to the physical address which contains an array of pointers to the
1420          * physical addresses of the specific queue pages.
1421          */
1422         for (i = 0; i < qedi->num_queues; i++) {
1423                 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1424                 list++;
1425                 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1426                 list++;
1427
1428                 *list = (u32)0;
1429                 list++;
1430                 *list = (u32)((u64)0 >> 32);
1431                 list++;
1432         }
1433
1434         return 0;
1435
1436 mem_alloc_failure:
1437         qedi_free_global_queues(qedi);
1438         return status;
1439 }
1440
1441 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1442 {
1443         int rval = 0;
1444         u32 *pbl;
1445         dma_addr_t page;
1446         int num_pages;
1447
1448         if (!ep)
1449                 return -EIO;
1450
1451         /* Calculate appropriate queue and PBL sizes */
1452         ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1453         ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1454
1455         ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1456         ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1457
1458         ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1459                                     &ep->sq_dma, GFP_KERNEL);
1460         if (!ep->sq) {
1461                 QEDI_WARN(&qedi->dbg_ctx,
1462                           "Could not allocate send queue.\n");
1463                 rval = -ENOMEM;
1464                 goto out;
1465         }
1466         memset(ep->sq, 0, ep->sq_mem_size);
1467
1468         ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1469                                         &ep->sq_pbl_dma, GFP_KERNEL);
1470         if (!ep->sq_pbl) {
1471                 QEDI_WARN(&qedi->dbg_ctx,
1472                           "Could not allocate send queue PBL.\n");
1473                 rval = -ENOMEM;
1474                 goto out_free_sq;
1475         }
1476         memset(ep->sq_pbl, 0, ep->sq_pbl_size);
1477
1478         /* Create PBL */
1479         num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1480         page = ep->sq_dma;
1481         pbl = (u32 *)ep->sq_pbl;
1482
1483         while (num_pages--) {
1484                 *pbl = (u32)page;
1485                 pbl++;
1486                 *pbl = (u32)((u64)page >> 32);
1487                 pbl++;
1488                 page += QEDI_PAGE_SIZE;
1489         }
1490
1491         return rval;
1492
1493 out_free_sq:
1494         dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1495                           ep->sq_dma);
1496 out:
1497         return rval;
1498 }
1499
1500 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1501 {
1502         if (ep->sq_pbl)
1503                 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1504                                   ep->sq_pbl_dma);
1505         if (ep->sq)
1506                 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1507                                   ep->sq_dma);
1508 }
1509
1510 int qedi_get_task_idx(struct qedi_ctx *qedi)
1511 {
1512         s16 tmp_idx;
1513
1514 again:
1515         tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1516                                       MAX_ISCSI_TASK_ENTRIES);
1517
1518         if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1519                 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1520                 tmp_idx = -1;
1521                 goto err_idx;
1522         }
1523
1524         if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1525                 goto again;
1526
1527 err_idx:
1528         return tmp_idx;
1529 }
1530
1531 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1532 {
1533         if (!test_and_clear_bit(idx, qedi->task_idx_map))
1534                 QEDI_ERR(&qedi->dbg_ctx,
1535                          "FW task context, already cleared, tid=0x%x\n", idx);
1536 }
1537
1538 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1539                          struct qedi_cmd *cmd)
1540 {
1541         qedi->itt_map[tid].itt = proto_itt;
1542         qedi->itt_map[tid].p_cmd = cmd;
1543
1544         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1545                   "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1546                   qedi->itt_map[tid].itt);
1547 }
1548
1549 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1550 {
1551         u16 i;
1552
1553         for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1554                 if (qedi->itt_map[i].itt == itt) {
1555                         *tid = i;
1556                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1557                                   "Ref itt=0x%x, found at tid=0x%x\n",
1558                                   itt, *tid);
1559                         return;
1560                 }
1561         }
1562
1563         WARN_ON(1);
1564 }
1565
1566 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1567 {
1568         *proto_itt = qedi->itt_map[tid].itt;
1569         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1570                   "Get itt map tid [0x%x with proto itt[0x%x]",
1571                   tid, *proto_itt);
1572 }
1573
1574 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1575 {
1576         struct qedi_cmd *cmd = NULL;
1577
1578         if (tid > MAX_ISCSI_TASK_ENTRIES)
1579                 return NULL;
1580
1581         cmd = qedi->itt_map[tid].p_cmd;
1582         if (cmd->task_id != tid)
1583                 return NULL;
1584
1585         qedi->itt_map[tid].p_cmd = NULL;
1586
1587         return cmd;
1588 }
1589
1590 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1591 {
1592         qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1593                                 sizeof(struct qedi_itt_map), GFP_KERNEL);
1594         if (!qedi->itt_map) {
1595                 QEDI_ERR(&qedi->dbg_ctx,
1596                          "Unable to allocate itt map array memory\n");
1597                 return -ENOMEM;
1598         }
1599         return 0;
1600 }
1601
1602 static void qedi_free_itt(struct qedi_ctx *qedi)
1603 {
1604         kfree(qedi->itt_map);
1605 }
1606
1607 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1608         .rx_cb = qedi_ll2_rx,
1609         .tx_cb = NULL,
1610 };
1611
1612 static int qedi_percpu_io_thread(void *arg)
1613 {
1614         struct qedi_percpu_s *p = arg;
1615         struct qedi_work *work, *tmp;
1616         unsigned long flags;
1617         LIST_HEAD(work_list);
1618
1619         set_user_nice(current, -20);
1620
1621         while (!kthread_should_stop()) {
1622                 spin_lock_irqsave(&p->p_work_lock, flags);
1623                 while (!list_empty(&p->work_list)) {
1624                         list_splice_init(&p->work_list, &work_list);
1625                         spin_unlock_irqrestore(&p->p_work_lock, flags);
1626
1627                         list_for_each_entry_safe(work, tmp, &work_list, list) {
1628                                 list_del_init(&work->list);
1629                                 qedi_fp_process_cqes(work);
1630                                 if (!work->is_solicited)
1631                                         kfree(work);
1632                         }
1633                         cond_resched();
1634                         spin_lock_irqsave(&p->p_work_lock, flags);
1635                 }
1636                 set_current_state(TASK_INTERRUPTIBLE);
1637                 spin_unlock_irqrestore(&p->p_work_lock, flags);
1638                 schedule();
1639         }
1640         __set_current_state(TASK_RUNNING);
1641
1642         return 0;
1643 }
1644
1645 static int qedi_cpu_online(unsigned int cpu)
1646 {
1647         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1648         struct task_struct *thread;
1649
1650         thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1651                                         cpu_to_node(cpu),
1652                                         "qedi_thread/%d", cpu);
1653         if (IS_ERR(thread))
1654                 return PTR_ERR(thread);
1655
1656         kthread_bind(thread, cpu);
1657         p->iothread = thread;
1658         wake_up_process(thread);
1659         return 0;
1660 }
1661
1662 static int qedi_cpu_offline(unsigned int cpu)
1663 {
1664         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1665         struct qedi_work *work, *tmp;
1666         struct task_struct *thread;
1667
1668         spin_lock_bh(&p->p_work_lock);
1669         thread = p->iothread;
1670         p->iothread = NULL;
1671
1672         list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1673                 list_del_init(&work->list);
1674                 qedi_fp_process_cqes(work);
1675                 if (!work->is_solicited)
1676                         kfree(work);
1677         }
1678
1679         spin_unlock_bh(&p->p_work_lock);
1680         if (thread)
1681                 kthread_stop(thread);
1682         return 0;
1683 }
1684
1685 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1686 {
1687         struct qed_ll2_params params;
1688
1689         qedi_recover_all_conns(qedi);
1690
1691         qedi_ops->ll2->stop(qedi->cdev);
1692         qedi_ll2_free_skbs(qedi);
1693
1694         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1695                   qedi->ll2_mtu, mtu);
1696         memset(&params, 0, sizeof(params));
1697         qedi->ll2_mtu = mtu;
1698         params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1699         params.drop_ttl0_packets = 0;
1700         params.rx_vlan_stripping = 1;
1701         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1702         qedi_ops->ll2->start(qedi->cdev, &params);
1703 }
1704
1705 /**
1706  * qedi_get_nvram_block: - Scan through the iSCSI NVRAM block (while accounting
1707  * for gaps) for the matching absolute-pf-id of the QEDI device.
1708  */
1709 static struct nvm_iscsi_block *
1710 qedi_get_nvram_block(struct qedi_ctx *qedi)
1711 {
1712         int i;
1713         u8 pf;
1714         u32 flags;
1715         struct nvm_iscsi_block *block;
1716
1717         pf = qedi->dev_info.common.abs_pf_id;
1718         block = &qedi->iscsi_cfg->block[0];
1719         for (i = 0; i < NUM_OF_ISCSI_PF_SUPPORTED; i++, block++) {
1720                 flags = ((block->id) & NVM_ISCSI_CFG_BLK_CTRL_FLAG_MASK) >>
1721                         NVM_ISCSI_CFG_BLK_CTRL_FLAG_OFFSET;
1722                 if (flags & (NVM_ISCSI_CFG_BLK_CTRL_FLAG_IS_NOT_EMPTY |
1723                                 NVM_ISCSI_CFG_BLK_CTRL_FLAG_PF_MAPPED) &&
1724                         (pf == (block->id & NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_MASK)
1725                                 >> NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_OFFSET))
1726                         return block;
1727         }
1728         return NULL;
1729 }
1730
1731 static ssize_t qedi_show_boot_eth_info(void *data, int type, char *buf)
1732 {
1733         struct qedi_ctx *qedi = data;
1734         struct nvm_iscsi_initiator *initiator;
1735         char *str = buf;
1736         int rc = 1;
1737         u32 ipv6_en, dhcp_en, ip_len;
1738         struct nvm_iscsi_block *block;
1739         char *fmt, *ip, *sub, *gw;
1740
1741         block = qedi_get_nvram_block(qedi);
1742         if (!block)
1743                 return 0;
1744
1745         initiator = &block->initiator;
1746         ipv6_en = block->generic.ctrl_flags &
1747                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
1748         dhcp_en = block->generic.ctrl_flags &
1749                   NVM_ISCSI_CFG_GEN_DHCP_TCPIP_CONFIG_ENABLED;
1750         /* Static IP assignments. */
1751         fmt = ipv6_en ? "%pI6\n" : "%pI4\n";
1752         ip = ipv6_en ? initiator->ipv6.addr.byte : initiator->ipv4.addr.byte;
1753         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
1754         sub = ipv6_en ? initiator->ipv6.subnet_mask.byte :
1755               initiator->ipv4.subnet_mask.byte;
1756         gw = ipv6_en ? initiator->ipv6.gateway.byte :
1757              initiator->ipv4.gateway.byte;
1758         /* DHCP IP adjustments. */
1759         fmt = dhcp_en ? "%s\n" : fmt;
1760         if (dhcp_en) {
1761                 ip = ipv6_en ? "0::0" : "0.0.0.0";
1762                 sub = ip;
1763                 gw = ip;
1764                 ip_len = ipv6_en ? 5 : 8;
1765         }
1766
1767         switch (type) {
1768         case ISCSI_BOOT_ETH_IP_ADDR:
1769                 rc = snprintf(str, ip_len, fmt, ip);
1770                 break;
1771         case ISCSI_BOOT_ETH_SUBNET_MASK:
1772                 rc = snprintf(str, ip_len, fmt, sub);
1773                 break;
1774         case ISCSI_BOOT_ETH_GATEWAY:
1775                 rc = snprintf(str, ip_len, fmt, gw);
1776                 break;
1777         case ISCSI_BOOT_ETH_FLAGS:
1778                 rc = snprintf(str, 3, "%hhd\n",
1779                               SYSFS_FLAG_FW_SEL_BOOT);
1780                 break;
1781         case ISCSI_BOOT_ETH_INDEX:
1782                 rc = snprintf(str, 3, "0\n");
1783                 break;
1784         case ISCSI_BOOT_ETH_MAC:
1785                 rc = sysfs_format_mac(str, qedi->mac, ETH_ALEN);
1786                 break;
1787         case ISCSI_BOOT_ETH_VLAN:
1788                 rc = snprintf(str, 12, "%d\n",
1789                               GET_FIELD2(initiator->generic_cont0,
1790                                          NVM_ISCSI_CFG_INITIATOR_VLAN));
1791                 break;
1792         case ISCSI_BOOT_ETH_ORIGIN:
1793                 if (dhcp_en)
1794                         rc = snprintf(str, 3, "3\n");
1795                 break;
1796         default:
1797                 rc = 0;
1798                 break;
1799         }
1800
1801         return rc;
1802 }
1803
1804 static umode_t qedi_eth_get_attr_visibility(void *data, int type)
1805 {
1806         int rc = 1;
1807
1808         switch (type) {
1809         case ISCSI_BOOT_ETH_FLAGS:
1810         case ISCSI_BOOT_ETH_MAC:
1811         case ISCSI_BOOT_ETH_INDEX:
1812         case ISCSI_BOOT_ETH_IP_ADDR:
1813         case ISCSI_BOOT_ETH_SUBNET_MASK:
1814         case ISCSI_BOOT_ETH_GATEWAY:
1815         case ISCSI_BOOT_ETH_ORIGIN:
1816         case ISCSI_BOOT_ETH_VLAN:
1817                 rc = 0444;
1818                 break;
1819         default:
1820                 rc = 0;
1821                 break;
1822         }
1823         return rc;
1824 }
1825
1826 static ssize_t qedi_show_boot_ini_info(void *data, int type, char *buf)
1827 {
1828         struct qedi_ctx *qedi = data;
1829         struct nvm_iscsi_initiator *initiator;
1830         char *str = buf;
1831         int rc;
1832         struct nvm_iscsi_block *block;
1833
1834         block = qedi_get_nvram_block(qedi);
1835         if (!block)
1836                 return 0;
1837
1838         initiator = &block->initiator;
1839
1840         switch (type) {
1841         case ISCSI_BOOT_INI_INITIATOR_NAME:
1842                 rc = snprintf(str, NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN, "%s\n",
1843                               initiator->initiator_name.byte);
1844                 break;
1845         default:
1846                 rc = 0;
1847                 break;
1848         }
1849         return rc;
1850 }
1851
1852 static umode_t qedi_ini_get_attr_visibility(void *data, int type)
1853 {
1854         int rc;
1855
1856         switch (type) {
1857         case ISCSI_BOOT_INI_INITIATOR_NAME:
1858                 rc = 0444;
1859                 break;
1860         default:
1861                 rc = 0;
1862                 break;
1863         }
1864         return rc;
1865 }
1866
1867 static ssize_t
1868 qedi_show_boot_tgt_info(struct qedi_ctx *qedi, int type,
1869                         char *buf, enum qedi_nvm_tgts idx)
1870 {
1871         char *str = buf;
1872         int rc = 1;
1873         u32 ctrl_flags, ipv6_en, chap_en, mchap_en, ip_len;
1874         struct nvm_iscsi_block *block;
1875         char *chap_name, *chap_secret;
1876         char *mchap_name, *mchap_secret;
1877
1878         block = qedi_get_nvram_block(qedi);
1879         if (!block)
1880                 goto exit_show_tgt_info;
1881
1882         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
1883                   "Port:%d, tgt_idx:%d\n",
1884                   GET_FIELD2(block->id, NVM_ISCSI_CFG_BLK_MAPPED_PF_ID), idx);
1885
1886         ctrl_flags = block->target[idx].ctrl_flags &
1887                      NVM_ISCSI_CFG_TARGET_ENABLED;
1888
1889         if (!ctrl_flags) {
1890                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
1891                           "Target disabled\n");
1892                 goto exit_show_tgt_info;
1893         }
1894
1895         ipv6_en = block->generic.ctrl_flags &
1896                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
1897         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
1898         chap_en = block->generic.ctrl_flags &
1899                   NVM_ISCSI_CFG_GEN_CHAP_ENABLED;
1900         chap_name = chap_en ? block->initiator.chap_name.byte : NULL;
1901         chap_secret = chap_en ? block->initiator.chap_password.byte : NULL;
1902
1903         mchap_en = block->generic.ctrl_flags &
1904                   NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED;
1905         mchap_name = mchap_en ? block->target[idx].chap_name.byte : NULL;
1906         mchap_secret = mchap_en ? block->target[idx].chap_password.byte : NULL;
1907
1908         switch (type) {
1909         case ISCSI_BOOT_TGT_NAME:
1910                 rc = snprintf(str, NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN, "%s\n",
1911                               block->target[idx].target_name.byte);
1912                 break;
1913         case ISCSI_BOOT_TGT_IP_ADDR:
1914                 if (ipv6_en)
1915                         rc = snprintf(str, ip_len, "%pI6\n",
1916                                       block->target[idx].ipv6_addr.byte);
1917                 else
1918                         rc = snprintf(str, ip_len, "%pI4\n",
1919                                       block->target[idx].ipv4_addr.byte);
1920                 break;
1921         case ISCSI_BOOT_TGT_PORT:
1922                 rc = snprintf(str, 12, "%d\n",
1923                               GET_FIELD2(block->target[idx].generic_cont0,
1924                                          NVM_ISCSI_CFG_TARGET_TCP_PORT));
1925                 break;
1926         case ISCSI_BOOT_TGT_LUN:
1927                 rc = snprintf(str, 22, "%.*d\n",
1928                               block->target[idx].lun.value[1],
1929                               block->target[idx].lun.value[0]);
1930                 break;
1931         case ISCSI_BOOT_TGT_CHAP_NAME:
1932                 rc = snprintf(str, NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN, "%s\n",
1933                               chap_name);
1934                 break;
1935         case ISCSI_BOOT_TGT_CHAP_SECRET:
1936                 rc = snprintf(str, NVM_ISCSI_CFG_CHAP_PWD_MAX_LEN, "%s\n",
1937                               chap_secret);
1938                 break;
1939         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
1940                 rc = snprintf(str, NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN, "%s\n",
1941                               mchap_name);
1942                 break;
1943         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
1944                 rc = snprintf(str, NVM_ISCSI_CFG_CHAP_PWD_MAX_LEN, "%s\n",
1945                               mchap_secret);
1946                 break;
1947         case ISCSI_BOOT_TGT_FLAGS:
1948                 rc = snprintf(str, 3, "%hhd\n", SYSFS_FLAG_FW_SEL_BOOT);
1949                 break;
1950         case ISCSI_BOOT_TGT_NIC_ASSOC:
1951                 rc = snprintf(str, 3, "0\n");
1952                 break;
1953         default:
1954                 rc = 0;
1955                 break;
1956         }
1957
1958 exit_show_tgt_info:
1959         return rc;
1960 }
1961
1962 static ssize_t qedi_show_boot_tgt_pri_info(void *data, int type, char *buf)
1963 {
1964         struct qedi_ctx *qedi = data;
1965
1966         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_PRI);
1967 }
1968
1969 static ssize_t qedi_show_boot_tgt_sec_info(void *data, int type, char *buf)
1970 {
1971         struct qedi_ctx *qedi = data;
1972
1973         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_SEC);
1974 }
1975
1976 static umode_t qedi_tgt_get_attr_visibility(void *data, int type)
1977 {
1978         int rc;
1979
1980         switch (type) {
1981         case ISCSI_BOOT_TGT_NAME:
1982         case ISCSI_BOOT_TGT_IP_ADDR:
1983         case ISCSI_BOOT_TGT_PORT:
1984         case ISCSI_BOOT_TGT_LUN:
1985         case ISCSI_BOOT_TGT_CHAP_NAME:
1986         case ISCSI_BOOT_TGT_CHAP_SECRET:
1987         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
1988         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
1989         case ISCSI_BOOT_TGT_NIC_ASSOC:
1990         case ISCSI_BOOT_TGT_FLAGS:
1991                 rc = 0444;
1992                 break;
1993         default:
1994                 rc = 0;
1995                 break;
1996         }
1997         return rc;
1998 }
1999
2000 static void qedi_boot_release(void *data)
2001 {
2002         struct qedi_ctx *qedi = data;
2003
2004         scsi_host_put(qedi->shost);
2005 }
2006
2007 static int qedi_get_boot_info(struct qedi_ctx *qedi)
2008 {
2009         int ret = 1;
2010         u16 len;
2011
2012         len = sizeof(struct nvm_iscsi_cfg);
2013
2014         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2015                   "Get NVM iSCSI CFG image\n");
2016         ret = qedi_ops->common->nvm_get_image(qedi->cdev,
2017                                               QED_NVM_IMAGE_ISCSI_CFG,
2018                                               (char *)qedi->iscsi_cfg, len);
2019         if (ret)
2020                 QEDI_ERR(&qedi->dbg_ctx,
2021                          "Could not get NVM image. ret = %d\n", ret);
2022
2023         return ret;
2024 }
2025
2026 static int qedi_setup_boot_info(struct qedi_ctx *qedi)
2027 {
2028         struct iscsi_boot_kobj *boot_kobj;
2029
2030         if (qedi_get_boot_info(qedi))
2031                 return -EPERM;
2032
2033         qedi->boot_kset = iscsi_boot_create_host_kset(qedi->shost->host_no);
2034         if (!qedi->boot_kset)
2035                 goto kset_free;
2036
2037         if (!scsi_host_get(qedi->shost))
2038                 goto kset_free;
2039
2040         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 0, qedi,
2041                                              qedi_show_boot_tgt_pri_info,
2042                                              qedi_tgt_get_attr_visibility,
2043                                              qedi_boot_release);
2044         if (!boot_kobj)
2045                 goto put_host;
2046
2047         if (!scsi_host_get(qedi->shost))
2048                 goto kset_free;
2049
2050         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 1, qedi,
2051                                              qedi_show_boot_tgt_sec_info,
2052                                              qedi_tgt_get_attr_visibility,
2053                                              qedi_boot_release);
2054         if (!boot_kobj)
2055                 goto put_host;
2056
2057         if (!scsi_host_get(qedi->shost))
2058                 goto kset_free;
2059
2060         boot_kobj = iscsi_boot_create_initiator(qedi->boot_kset, 0, qedi,
2061                                                 qedi_show_boot_ini_info,
2062                                                 qedi_ini_get_attr_visibility,
2063                                                 qedi_boot_release);
2064         if (!boot_kobj)
2065                 goto put_host;
2066
2067         if (!scsi_host_get(qedi->shost))
2068                 goto kset_free;
2069
2070         boot_kobj = iscsi_boot_create_ethernet(qedi->boot_kset, 0, qedi,
2071                                                qedi_show_boot_eth_info,
2072                                                qedi_eth_get_attr_visibility,
2073                                                qedi_boot_release);
2074         if (!boot_kobj)
2075                 goto put_host;
2076
2077         return 0;
2078
2079 put_host:
2080         scsi_host_put(qedi->shost);
2081 kset_free:
2082         iscsi_boot_destroy_kset(qedi->boot_kset);
2083         return -ENOMEM;
2084 }
2085
2086 static void __qedi_remove(struct pci_dev *pdev, int mode)
2087 {
2088         struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2089
2090         if (qedi->tmf_thread) {
2091                 flush_workqueue(qedi->tmf_thread);
2092                 destroy_workqueue(qedi->tmf_thread);
2093                 qedi->tmf_thread = NULL;
2094         }
2095
2096         if (qedi->offload_thread) {
2097                 flush_workqueue(qedi->offload_thread);
2098                 destroy_workqueue(qedi->offload_thread);
2099                 qedi->offload_thread = NULL;
2100         }
2101
2102 #ifdef CONFIG_DEBUG_FS
2103         qedi_dbg_host_exit(&qedi->dbg_ctx);
2104 #endif
2105         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
2106                 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2107
2108         qedi_sync_free_irqs(qedi);
2109
2110         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2111                 qedi_ops->stop(qedi->cdev);
2112                 qedi_ops->ll2->stop(qedi->cdev);
2113         }
2114
2115         if (mode == QEDI_MODE_NORMAL)
2116                 qedi_free_iscsi_pf_param(qedi);
2117
2118         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2119                 qedi_ops->common->slowpath_stop(qedi->cdev);
2120                 qedi_ops->common->remove(qedi->cdev);
2121         }
2122
2123         qedi_destroy_fp(qedi);
2124
2125         if (mode == QEDI_MODE_NORMAL) {
2126                 qedi_release_cid_que(qedi);
2127                 qedi_cm_free_mem(qedi);
2128                 qedi_free_uio(qedi->udev);
2129                 qedi_free_itt(qedi);
2130
2131                 iscsi_host_remove(qedi->shost);
2132                 iscsi_host_free(qedi->shost);
2133
2134                 if (qedi->ll2_recv_thread) {
2135                         kthread_stop(qedi->ll2_recv_thread);
2136                         qedi->ll2_recv_thread = NULL;
2137                 }
2138                 qedi_ll2_free_skbs(qedi);
2139
2140                 if (qedi->boot_kset)
2141                         iscsi_boot_destroy_kset(qedi->boot_kset);
2142         }
2143 }
2144
2145 static int __qedi_probe(struct pci_dev *pdev, int mode)
2146 {
2147         struct qedi_ctx *qedi;
2148         struct qed_ll2_params params;
2149         u32 dp_module = 0;
2150         u8 dp_level = 0;
2151         bool is_vf = false;
2152         char host_buf[16];
2153         struct qed_link_params link_params;
2154         struct qed_slowpath_params sp_params;
2155         struct qed_probe_params qed_params;
2156         void *task_start, *task_end;
2157         int rc;
2158         u16 tmp;
2159
2160         if (mode != QEDI_MODE_RECOVERY) {
2161                 qedi = qedi_host_alloc(pdev);
2162                 if (!qedi) {
2163                         rc = -ENOMEM;
2164                         goto exit_probe;
2165                 }
2166         } else {
2167                 qedi = pci_get_drvdata(pdev);
2168         }
2169
2170         memset(&qed_params, 0, sizeof(qed_params));
2171         qed_params.protocol = QED_PROTOCOL_ISCSI;
2172         qed_params.dp_module = dp_module;
2173         qed_params.dp_level = dp_level;
2174         qed_params.is_vf = is_vf;
2175         qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
2176         if (!qedi->cdev) {
2177                 rc = -ENODEV;
2178                 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
2179                 goto free_host;
2180         }
2181
2182         qedi->msix_count = MAX_NUM_MSIX_PF;
2183         atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2184
2185         if (mode != QEDI_MODE_RECOVERY) {
2186                 rc = qedi_set_iscsi_pf_param(qedi);
2187                 if (rc) {
2188                         rc = -ENOMEM;
2189                         QEDI_ERR(&qedi->dbg_ctx,
2190                                  "Set iSCSI pf param fail\n");
2191                         goto free_host;
2192                 }
2193         }
2194
2195         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2196
2197         rc = qedi_prepare_fp(qedi);
2198         if (rc) {
2199                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
2200                 goto free_pf_params;
2201         }
2202
2203         /* Start the Slowpath-process */
2204         memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
2205         sp_params.int_mode = QED_INT_MODE_MSIX;
2206         sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
2207         sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
2208         sp_params.drv_rev = QEDI_DRIVER_REV_VER;
2209         sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
2210         strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
2211         rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
2212         if (rc) {
2213                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
2214                 goto stop_hw;
2215         }
2216
2217         /* update_pf_params needs to be called before and after slowpath
2218          * start
2219          */
2220         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2221
2222         rc = qedi_setup_int(qedi);
2223         if (rc)
2224                 goto stop_iscsi_func;
2225
2226         qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2227
2228         /* Learn information crucial for qedi to progress */
2229         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2230         if (rc)
2231                 goto stop_iscsi_func;
2232
2233         /* Record BDQ producer doorbell addresses */
2234         qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
2235         qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
2236         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2237                   "BDQ primary_prod=%p secondary_prod=%p.\n",
2238                   qedi->bdq_primary_prod,
2239                   qedi->bdq_secondary_prod);
2240
2241         /*
2242          * We need to write the number of BDs in the BDQ we've preallocated so
2243          * the f/w will do a prefetch and we'll get an unsolicited CQE when a
2244          * packet arrives.
2245          */
2246         qedi->bdq_prod_idx = QEDI_BDQ_NUM;
2247         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2248                   "Writing %d to primary and secondary BDQ doorbell registers.\n",
2249                   qedi->bdq_prod_idx);
2250         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
2251         tmp = readw(qedi->bdq_primary_prod);
2252         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
2253         tmp = readw(qedi->bdq_secondary_prod);
2254
2255         ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
2256         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
2257                   qedi->mac);
2258
2259         sprintf(host_buf, "host_%d", qedi->shost->host_no);
2260         qedi_ops->common->set_name(qedi->cdev, host_buf);
2261
2262         qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
2263
2264         memset(&params, 0, sizeof(params));
2265         params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
2266         qedi->ll2_mtu = DEF_PATH_MTU;
2267         params.drop_ttl0_packets = 0;
2268         params.rx_vlan_stripping = 1;
2269         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
2270
2271         if (mode != QEDI_MODE_RECOVERY) {
2272                 /* set up rx path */
2273                 INIT_LIST_HEAD(&qedi->ll2_skb_list);
2274                 spin_lock_init(&qedi->ll2_lock);
2275                 /* start qedi context */
2276                 spin_lock_init(&qedi->hba_lock);
2277                 spin_lock_init(&qedi->task_idx_lock);
2278         }
2279         qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
2280         qedi_ops->ll2->start(qedi->cdev, &params);
2281
2282         if (mode != QEDI_MODE_RECOVERY) {
2283                 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
2284                                                     (void *)qedi,
2285                                                     "qedi_ll2_thread");
2286         }
2287
2288         rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
2289                              qedi, qedi_iscsi_event_cb);
2290         if (rc) {
2291                 rc = -ENODEV;
2292                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
2293                 goto stop_slowpath;
2294         }
2295
2296         task_start = qedi_get_task_mem(&qedi->tasks, 0);
2297         task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
2298         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2299                   "Task context start=%p, end=%p block_size=%u.\n",
2300                    task_start, task_end, qedi->tasks.size);
2301
2302         memset(&link_params, 0, sizeof(link_params));
2303         link_params.link_up = true;
2304         rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
2305         if (rc) {
2306                 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
2307                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2308         }
2309
2310 #ifdef CONFIG_DEBUG_FS
2311         qedi_dbg_host_init(&qedi->dbg_ctx, &qedi_debugfs_ops,
2312                            &qedi_dbg_fops);
2313 #endif
2314         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2315                   "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
2316                   QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
2317                   FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
2318
2319         if (mode == QEDI_MODE_NORMAL) {
2320                 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
2321                         QEDI_ERR(&qedi->dbg_ctx,
2322                                  "Could not add iscsi host\n");
2323                         rc = -ENOMEM;
2324                         goto remove_host;
2325                 }
2326
2327                 /* Allocate uio buffers */
2328                 rc = qedi_alloc_uio_rings(qedi);
2329                 if (rc) {
2330                         QEDI_ERR(&qedi->dbg_ctx,
2331                                  "UIO alloc ring failed err=%d\n", rc);
2332                         goto remove_host;
2333                 }
2334
2335                 rc = qedi_init_uio(qedi);
2336                 if (rc) {
2337                         QEDI_ERR(&qedi->dbg_ctx,
2338                                  "UIO init failed, err=%d\n", rc);
2339                         goto free_uio;
2340                 }
2341
2342                 /* host the array on iscsi_conn */
2343                 rc = qedi_setup_cid_que(qedi);
2344                 if (rc) {
2345                         QEDI_ERR(&qedi->dbg_ctx,
2346                                  "Could not setup cid que\n");
2347                         goto free_uio;
2348                 }
2349
2350                 rc = qedi_cm_alloc_mem(qedi);
2351                 if (rc) {
2352                         QEDI_ERR(&qedi->dbg_ctx,
2353                                  "Could not alloc cm memory\n");
2354                         goto free_cid_que;
2355                 }
2356
2357                 rc = qedi_alloc_itt(qedi);
2358                 if (rc) {
2359                         QEDI_ERR(&qedi->dbg_ctx,
2360                                  "Could not alloc itt memory\n");
2361                         goto free_cid_que;
2362                 }
2363
2364                 sprintf(host_buf, "host_%d", qedi->shost->host_no);
2365                 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
2366                 if (!qedi->tmf_thread) {
2367                         QEDI_ERR(&qedi->dbg_ctx,
2368                                  "Unable to start tmf thread!\n");
2369                         rc = -ENODEV;
2370                         goto free_cid_que;
2371                 }
2372
2373                 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
2374                 qedi->offload_thread = create_workqueue(host_buf);
2375                 if (!qedi->offload_thread) {
2376                         QEDI_ERR(&qedi->dbg_ctx,
2377                                  "Unable to start offload thread!\n");
2378                         rc = -ENODEV;
2379                         goto free_cid_que;
2380                 }
2381
2382                 /* F/w needs 1st task context memory entry for performance */
2383                 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
2384                 atomic_set(&qedi->num_offloads, 0);
2385
2386                 if (qedi_setup_boot_info(qedi))
2387                         QEDI_ERR(&qedi->dbg_ctx,
2388                                  "No iSCSI boot target configured\n");
2389         }
2390
2391         return 0;
2392
2393 free_cid_que:
2394         qedi_release_cid_que(qedi);
2395 free_uio:
2396         qedi_free_uio(qedi->udev);
2397 remove_host:
2398 #ifdef CONFIG_DEBUG_FS
2399         qedi_dbg_host_exit(&qedi->dbg_ctx);
2400 #endif
2401         iscsi_host_remove(qedi->shost);
2402 stop_iscsi_func:
2403         qedi_ops->stop(qedi->cdev);
2404 stop_slowpath:
2405         qedi_ops->common->slowpath_stop(qedi->cdev);
2406 stop_hw:
2407         qedi_ops->common->remove(qedi->cdev);
2408 free_pf_params:
2409         qedi_free_iscsi_pf_param(qedi);
2410 free_host:
2411         iscsi_host_free(qedi->shost);
2412 exit_probe:
2413         return rc;
2414 }
2415
2416 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2417 {
2418         return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2419 }
2420
2421 static void qedi_remove(struct pci_dev *pdev)
2422 {
2423         __qedi_remove(pdev, QEDI_MODE_NORMAL);
2424 }
2425
2426 static struct pci_device_id qedi_pci_tbl[] = {
2427         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2428         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
2429         { 0 },
2430 };
2431 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2432
2433 static enum cpuhp_state qedi_cpuhp_state;
2434
2435 static struct pci_driver qedi_pci_driver = {
2436         .name = QEDI_MODULE_NAME,
2437         .id_table = qedi_pci_tbl,
2438         .probe = qedi_probe,
2439         .remove = qedi_remove,
2440 };
2441
2442 static int __init qedi_init(void)
2443 {
2444         struct qedi_percpu_s *p;
2445         int cpu, rc = 0;
2446
2447         qedi_ops = qed_get_iscsi_ops();
2448         if (!qedi_ops) {
2449                 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2450                 return -EINVAL;
2451         }
2452
2453 #ifdef CONFIG_DEBUG_FS
2454         qedi_dbg_init("qedi");
2455 #endif
2456
2457         qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2458         if (!qedi_scsi_transport) {
2459                 QEDI_ERR(NULL, "Could not register qedi transport");
2460                 rc = -ENOMEM;
2461                 goto exit_qedi_init_1;
2462         }
2463
2464         for_each_possible_cpu(cpu) {
2465                 p = &per_cpu(qedi_percpu, cpu);
2466                 INIT_LIST_HEAD(&p->work_list);
2467                 spin_lock_init(&p->p_work_lock);
2468                 p->iothread = NULL;
2469         }
2470
2471         rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2472                                qedi_cpu_online, qedi_cpu_offline);
2473         if (rc < 0)
2474                 goto exit_qedi_init_2;
2475         qedi_cpuhp_state = rc;
2476
2477         rc = pci_register_driver(&qedi_pci_driver);
2478         if (rc) {
2479                 QEDI_ERR(NULL, "Failed to register driver\n");
2480                 goto exit_qedi_hp;
2481         }
2482
2483         return 0;
2484
2485 exit_qedi_hp:
2486         cpuhp_remove_state(qedi_cpuhp_state);
2487 exit_qedi_init_2:
2488         iscsi_unregister_transport(&qedi_iscsi_transport);
2489 exit_qedi_init_1:
2490 #ifdef CONFIG_DEBUG_FS
2491         qedi_dbg_exit();
2492 #endif
2493         qed_put_iscsi_ops();
2494         return rc;
2495 }
2496
2497 static void __exit qedi_cleanup(void)
2498 {
2499         pci_unregister_driver(&qedi_pci_driver);
2500         cpuhp_remove_state(qedi_cpuhp_state);
2501         iscsi_unregister_transport(&qedi_iscsi_transport);
2502
2503 #ifdef CONFIG_DEBUG_FS
2504         qedi_dbg_exit();
2505 #endif
2506         qed_put_iscsi_ops();
2507 }
2508
2509 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2510 MODULE_LICENSE("GPL");
2511 MODULE_AUTHOR("QLogic Corporation");
2512 MODULE_VERSION(QEDI_MODULE_VERSION);
2513 module_init(qedi_init);
2514 module_exit(qedi_cleanup);