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 - 1;
 632         shost->max_channel = 0;
 633         shost->max_lun = ~0;
 634         shost->max_cmd_len = 16;
 635         shost->transportt = qedi_scsi_transport;
 636
 637         qedi = iscsi_host_priv(shost);
 638         memset(qedi, 0, sizeof(*qedi));
 639         qedi->shost = shost;
 640         qedi->dbg_ctx.host_no = shost->host_no;
 641         qedi->pdev = pdev;
 642         qedi->dbg_ctx.pdev = pdev;
 643         qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
 644         qedi->max_sqes = QEDI_SQ_SIZE;
 645
 646         if (shost_use_blk_mq(shost))
 647                 shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
 648
 649         pci_set_drvdata(pdev, qedi);
 650
 651 exit_setup_shost:
 652         return qedi;
 653 }
 654
 655 static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
 656 {
 657         struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
 658         struct qedi_uio_dev *udev;
 659         struct qedi_uio_ctrl *uctrl;
 660         struct skb_work_list *work;
 661         u32 prod;
 662
 663         if (!qedi) {
 664                 QEDI_ERR(NULL, "qedi is NULL\n");
 665                 return -1;
 666         }
 667
 668         if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
 669                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
 670                           "UIO DEV is not opened\n");
 671                 kfree_skb(skb);
 672                 return 0;
 673         }
 674
 675         udev = qedi->udev;
 676         uctrl = udev->uctrl;
 677
 678         work = kzalloc(sizeof(*work), GFP_ATOMIC);
 679         if (!work) {
 680                 QEDI_WARN(&qedi->dbg_ctx,
 681                           "Could not allocate work so dropping frame.\n");
 682                 kfree_skb(skb);
 683                 return 0;
 684         }
 685
 686         INIT_LIST_HEAD(&work->list);
 687         work->skb = skb;
 688
 689         if (skb_vlan_tag_present(skb))
 690                 work->vlan_id = skb_vlan_tag_get(skb);
 691
 692         if (work->vlan_id)
 693                 __vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
 694
 695         spin_lock_bh(&qedi->ll2_lock);
 696         list_add_tail(&work->list, &qedi->ll2_skb_list);
 697
 698         ++uctrl->hw_rx_prod_cnt;
 699         prod = (uctrl->hw_rx_prod + 1) % RX_RING;
 700         if (prod != uctrl->host_rx_cons) {
 701                 uctrl->hw_rx_prod = prod;
 702                 spin_unlock_bh(&qedi->ll2_lock);
 703                 wake_up_process(qedi->ll2_recv_thread);
 704                 return 0;
 705         }
 706
 707         spin_unlock_bh(&qedi->ll2_lock);
 708         return 0;
 709 }
 710
 711 /* map this skb to iscsiuio mmaped region */
 712 static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
 713                                 u16 vlan_id)
 714 {
 715         struct qedi_uio_dev *udev = NULL;
 716         struct qedi_uio_ctrl *uctrl = NULL;
 717         struct qedi_rx_bd rxbd;
 718         struct qedi_rx_bd *p_rxbd;
 719         u32 rx_bd_prod;
 720         void *pkt;
 721         int len = 0;
 722
 723         if (!qedi) {
 724                 QEDI_ERR(NULL, "qedi is NULL\n");
 725                 return -1;
 726         }
 727
 728         udev = qedi->udev;
 729         uctrl = udev->uctrl;
 730         pkt = udev->rx_pkt + (uctrl->hw_rx_prod * LL2_SINGLE_BUF_SIZE);
 731         len = min_t(u32, skb->len, (u32)LL2_SINGLE_BUF_SIZE);
 732         memcpy(pkt, skb->data, len);
 733
 734         memset(&rxbd, 0, sizeof(rxbd));
 735         rxbd.rx_pkt_index = uctrl->hw_rx_prod;
 736         rxbd.rx_pkt_len = len;
 737         rxbd.vlan_id = vlan_id;
 738
 739         uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
 740         rx_bd_prod = uctrl->hw_rx_bd_prod;
 741         p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
 742         p_rxbd += rx_bd_prod;
 743
 744         memcpy(p_rxbd, &rxbd, sizeof(rxbd));
 745
 746         /* notify the iscsiuio about new packet */
 747         uio_event_notify(&udev->qedi_uinfo);
 748
 749         return 0;
 750 }
 751
 752 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
 753 {
 754         struct skb_work_list *work, *work_tmp;
 755
 756         spin_lock_bh(&qedi->ll2_lock);
 757         list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
 758                 list_del(&work->list);
 759                 if (work->skb)
 760                         kfree_skb(work->skb);
 761                 kfree(work);
 762         }
 763         spin_unlock_bh(&qedi->ll2_lock);
 764 }
 765
 766 static int qedi_ll2_recv_thread(void *arg)
 767 {
 768         struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
 769         struct skb_work_list *work, *work_tmp;
 770
 771         set_user_nice(current, -20);
 772
 773         while (!kthread_should_stop()) {
 774                 spin_lock_bh(&qedi->ll2_lock);
 775                 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
 776                                          list) {
 777                         list_del(&work->list);
 778                         qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
 779                         kfree_skb(work->skb);
 780                         kfree(work);
 781                 }
 782                 set_current_state(TASK_INTERRUPTIBLE);
 783                 spin_unlock_bh(&qedi->ll2_lock);
 784                 schedule();
 785         }
 786
 787         __set_current_state(TASK_RUNNING);
 788         return 0;
 789 }
 790
 791 static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
 792 {
 793         u8 num_sq_pages;
 794         u32 log_page_size;
 795         int rval = 0;
 796
 797
 798         num_sq_pages = (MAX_OUSTANDING_TASKS_PER_CON * 8) / PAGE_SIZE;
 799
 800         qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
 801
 802         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 803                   "Number of CQ count is %d\n", qedi->num_queues);
 804
 805         memset(&qedi->pf_params.iscsi_pf_params, 0,
 806                sizeof(qedi->pf_params.iscsi_pf_params));
 807
 808         qedi->p_cpuq = pci_alloc_consistent(qedi->pdev,
 809                         qedi->num_queues * sizeof(struct qedi_glbl_q_params),
 810                         &qedi->hw_p_cpuq);
 811         if (!qedi->p_cpuq) {
 812                 QEDI_ERR(&qedi->dbg_ctx, "pci_alloc_consistent fail\n");
 813                 rval = -1;
 814                 goto err_alloc_mem;
 815         }
 816
 817         rval = qedi_alloc_global_queues(qedi);
 818         if (rval) {
 819                 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
 820                 rval = -1;
 821                 goto err_alloc_mem;
 822         }
 823
 824         qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
 825         qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
 826         qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
 827         qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
 828         qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
 829         qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
 830         qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
 831         qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
 832         qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000;
 833         qedi->pf_params.iscsi_pf_params.max_fin_rt = 2;
 834
 835         for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
 836                 if ((1 << log_page_size) == PAGE_SIZE)
 837                         break;
 838         }
 839         qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
 840
 841         qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
 842                                                            (u64)qedi->hw_p_cpuq;
 843
 844         /* RQ BDQ initializations.
 845          * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
 846          * rqe_log_size: 8 for 256B RQE
 847          */
 848         qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
 849         /* BDQ address and size */
 850         qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
 851                                                         qedi->bdq_pbl_list_dma;
 852         qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
 853                                                 qedi->bdq_pbl_list_num_entries;
 854         qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
 855
 856         /* cq_num_entries: num_tasks + rq_num_entries */
 857         qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
 858
 859         qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
 860         qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
 861         qedi->pf_params.iscsi_pf_params.ooo_enable = 1;
 862
 863 err_alloc_mem:
 864         return rval;
 865 }
 866
 867 /* Free DMA coherent memory for array of queue pointers we pass to qed */
 868 static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
 869 {
 870         size_t size = 0;
 871
 872         if (qedi->p_cpuq) {
 873                 size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
 874                 pci_free_consistent(qedi->pdev, size, qedi->p_cpuq,
 875                                     qedi->hw_p_cpuq);
 876         }
 877
 878         qedi_free_global_queues(qedi);
 879
 880         kfree(qedi->global_queues);
 881 }
 882
 883 static void qedi_link_update(void *dev, struct qed_link_output *link)
 884 {
 885         struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
 886
 887         if (link->link_up) {
 888                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
 889                 atomic_set(&qedi->link_state, QEDI_LINK_UP);
 890         } else {
 891                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 892                           "Link Down event.\n");
 893                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
 894         }
 895 }
 896
 897 static struct qed_iscsi_cb_ops qedi_cb_ops = {
 898         {
 899                 .link_update =          qedi_link_update,
 900         }
 901 };
 902
 903 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
 904                           u16 que_idx, struct qedi_percpu_s *p)
 905 {
 906         struct qedi_work *qedi_work;
 907         struct qedi_conn *q_conn;
 908         struct iscsi_conn *conn;
 909         struct qedi_cmd *qedi_cmd;
 910         u32 iscsi_cid;
 911         int rc = 0;
 912
 913         iscsi_cid  = cqe->cqe_common.conn_id;
 914         q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 915         if (!q_conn) {
 916                 QEDI_WARN(&qedi->dbg_ctx,
 917                           "Session no longer exists for cid=0x%x!!\n",
 918                           iscsi_cid);
 919                 return -1;
 920         }
 921         conn = q_conn->cls_conn->dd_data;
 922
 923         switch (cqe->cqe_common.cqe_type) {
 924         case ISCSI_CQE_TYPE_SOLICITED:
 925         case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
 926                 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
 927                 if (!qedi_cmd) {
 928                         rc = -1;
 929                         break;
 930                 }
 931                 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
 932                 qedi_cmd->cqe_work.qedi = qedi;
 933                 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
 934                 qedi_cmd->cqe_work.que_idx = que_idx;
 935                 qedi_cmd->cqe_work.is_solicited = true;
 936                 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
 937                 break;
 938         case ISCSI_CQE_TYPE_UNSOLICITED:
 939         case ISCSI_CQE_TYPE_DUMMY:
 940         case ISCSI_CQE_TYPE_TASK_CLEANUP:
 941                 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
 942                 if (!qedi_work) {
 943                         rc = -1;
 944                         break;
 945                 }
 946                 INIT_LIST_HEAD(&qedi_work->list);
 947                 qedi_work->qedi = qedi;
 948                 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
 949                 qedi_work->que_idx = que_idx;
 950                 qedi_work->is_solicited = false;
 951                 list_add_tail(&qedi_work->list, &p->work_list);
 952                 break;
 953         default:
 954                 rc = -1;
 955                 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
 956         }
 957         return rc;
 958 }
 959
 960 static bool qedi_process_completions(struct qedi_fastpath *fp)
 961 {
 962         struct qedi_ctx *qedi = fp->qedi;
 963         struct qed_sb_info *sb_info = fp->sb_info;
 964         struct status_block *sb = sb_info->sb_virt;
 965         struct qedi_percpu_s *p = NULL;
 966         struct global_queue *que;
 967         u16 prod_idx;
 968         unsigned long flags;
 969         union iscsi_cqe *cqe;
 970         int cpu;
 971         int ret;
 972
 973         /* Get the current firmware producer index */
 974         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
 975
 976         if (prod_idx >= QEDI_CQ_SIZE)
 977                 prod_idx = prod_idx % QEDI_CQ_SIZE;
 978
 979         que = qedi->global_queues[fp->sb_id];
 980         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
 981                   "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
 982                   que, prod_idx, que->cq_cons_idx, fp->sb_id);
 983
 984         qedi->intr_cpu = fp->sb_id;
 985         cpu = smp_processor_id();
 986         p = &per_cpu(qedi_percpu, cpu);
 987
 988         if (unlikely(!p->iothread))
 989                 WARN_ON(1);
 990
 991         spin_lock_irqsave(&p->p_work_lock, flags);
 992         while (que->cq_cons_idx != prod_idx) {
 993                 cqe = &que->cq[que->cq_cons_idx];
 994
 995                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
 996                           "cqe=%p prod_idx=%d cons_idx=%d.\n",
 997                           cqe, prod_idx, que->cq_cons_idx);
 998
 999                 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
1000                 if (ret)
1001                         continue;
1002
1003                 que->cq_cons_idx++;
1004                 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1005                         que->cq_cons_idx = 0;
1006         }
1007         wake_up_process(p->iothread);
1008         spin_unlock_irqrestore(&p->p_work_lock, flags);
1009
1010         return true;
1011 }
1012
1013 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1014 {
1015         struct qedi_ctx *qedi = fp->qedi;
1016         struct global_queue *que;
1017         struct qed_sb_info *sb_info = fp->sb_info;
1018         struct status_block *sb = sb_info->sb_virt;
1019         u16 prod_idx;
1020
1021         barrier();
1022
1023         /* Get the current firmware producer index */
1024         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1025
1026         /* Get the pointer to the global CQ this completion is on */
1027         que = qedi->global_queues[fp->sb_id];
1028
1029         /* prod idx wrap around uint16 */
1030         if (prod_idx >= QEDI_CQ_SIZE)
1031                 prod_idx = prod_idx % QEDI_CQ_SIZE;
1032
1033         return (que->cq_cons_idx != prod_idx);
1034 }
1035
1036 /* MSI-X fastpath handler code */
1037 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1038 {
1039         struct qedi_fastpath *fp = dev_id;
1040         struct qedi_ctx *qedi = fp->qedi;
1041         bool wake_io_thread = true;
1042
1043         qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1044
1045 process_again:
1046         wake_io_thread = qedi_process_completions(fp);
1047         if (wake_io_thread) {
1048                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1049                           "process already running\n");
1050         }
1051
1052         if (qedi_fp_has_work(fp) == 0)
1053                 qed_sb_update_sb_idx(fp->sb_info);
1054
1055         /* Check for more work */
1056         rmb();
1057
1058         if (qedi_fp_has_work(fp) == 0)
1059                 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1060         else
1061                 goto process_again;
1062
1063         return IRQ_HANDLED;
1064 }
1065
1066 /* simd handler for MSI/INTa */
1067 static void qedi_simd_int_handler(void *cookie)
1068 {
1069         /* Cookie is qedi_ctx struct */
1070         struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1071
1072         QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1073 }
1074
1075 #define QEDI_SIMD_HANDLER_NUM           0
1076 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1077 {
1078         int i;
1079
1080         if (qedi->int_info.msix_cnt) {
1081                 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1082                         synchronize_irq(qedi->int_info.msix[i].vector);
1083                         irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1084                                               NULL);
1085                         free_irq(qedi->int_info.msix[i].vector,
1086                                  &qedi->fp_array[i]);
1087                 }
1088         } else {
1089                 qedi_ops->common->simd_handler_clean(qedi->cdev,
1090                                                      QEDI_SIMD_HANDLER_NUM);
1091         }
1092
1093         qedi->int_info.used_cnt = 0;
1094         qedi_ops->common->set_fp_int(qedi->cdev, 0);
1095 }
1096
1097 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1098 {
1099         int i, rc, cpu;
1100
1101         cpu = cpumask_first(cpu_online_mask);
1102         for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
1103                 rc = request_irq(qedi->int_info.msix[i].vector,
1104                                  qedi_msix_handler, 0, "qedi",
1105                                  &qedi->fp_array[i]);
1106
1107                 if (rc) {
1108                         QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1109                         qedi_sync_free_irqs(qedi);
1110                         return rc;
1111                 }
1112                 qedi->int_info.used_cnt++;
1113                 rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1114                                            get_cpu_mask(cpu));
1115                 cpu = cpumask_next(cpu, cpu_online_mask);
1116         }
1117
1118         return 0;
1119 }
1120
1121 static int qedi_setup_int(struct qedi_ctx *qedi)
1122 {
1123         int rc = 0;
1124
1125         rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1126         rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1127         if (rc)
1128                 goto exit_setup_int;
1129
1130         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1131                   "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1132                    qedi->int_info.msix_cnt, num_online_cpus());
1133
1134         if (qedi->int_info.msix_cnt) {
1135                 rc = qedi_request_msix_irq(qedi);
1136                 goto exit_setup_int;
1137         } else {
1138                 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1139                                                       QEDI_SIMD_HANDLER_NUM,
1140                                                       qedi_simd_int_handler);
1141                 qedi->int_info.used_cnt = 1;
1142         }
1143
1144 exit_setup_int:
1145         return rc;
1146 }
1147
1148 static void qedi_free_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1149 {
1150         if (qedi->iscsi_image)
1151                 dma_free_coherent(&qedi->pdev->dev,
1152                                   sizeof(struct qedi_nvm_iscsi_image),
1153                                   qedi->iscsi_image, qedi->nvm_buf_dma);
1154 }
1155
1156 static int qedi_alloc_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1157 {
1158         struct qedi_nvm_iscsi_image nvm_image;
1159
1160         qedi->iscsi_image = dma_zalloc_coherent(&qedi->pdev->dev,
1161                                                 sizeof(nvm_image),
1162                                                 &qedi->nvm_buf_dma,
1163                                                 GFP_KERNEL);
1164         if (!qedi->iscsi_image) {
1165                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate NVM BUF.\n");
1166                 return -ENOMEM;
1167         }
1168         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1169                   "NVM BUF addr=0x%p dma=0x%llx.\n", qedi->iscsi_image,
1170                   qedi->nvm_buf_dma);
1171
1172         return 0;
1173 }
1174
1175 static void qedi_free_bdq(struct qedi_ctx *qedi)
1176 {
1177         int i;
1178
1179         if (qedi->bdq_pbl_list)
1180                 dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
1181                                   qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1182
1183         if (qedi->bdq_pbl)
1184                 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1185                                   qedi->bdq_pbl, qedi->bdq_pbl_dma);
1186
1187         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1188                 if (qedi->bdq[i].buf_addr) {
1189                         dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1190                                           qedi->bdq[i].buf_addr,
1191                                           qedi->bdq[i].buf_dma);
1192                 }
1193         }
1194 }
1195
1196 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1197 {
1198         int i;
1199         struct global_queue **gl = qedi->global_queues;
1200
1201         for (i = 0; i < qedi->num_queues; i++) {
1202                 if (!gl[i])
1203                         continue;
1204
1205                 if (gl[i]->cq)
1206                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1207                                           gl[i]->cq, gl[i]->cq_dma);
1208                 if (gl[i]->cq_pbl)
1209                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1210                                           gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1211
1212                 kfree(gl[i]);
1213         }
1214         qedi_free_bdq(qedi);
1215         qedi_free_nvm_iscsi_cfg(qedi);
1216 }
1217
1218 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1219 {
1220         int i;
1221         struct scsi_bd *pbl;
1222         u64 *list;
1223         dma_addr_t page;
1224
1225         /* Alloc dma memory for BDQ buffers */
1226         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1227                 qedi->bdq[i].buf_addr =
1228                                 dma_alloc_coherent(&qedi->pdev->dev,
1229                                                    QEDI_BDQ_BUF_SIZE,
1230                                                    &qedi->bdq[i].buf_dma,
1231                                                    GFP_KERNEL);
1232                 if (!qedi->bdq[i].buf_addr) {
1233                         QEDI_ERR(&qedi->dbg_ctx,
1234                                  "Could not allocate BDQ buffer %d.\n", i);
1235                         return -ENOMEM;
1236                 }
1237         }
1238
1239         /* Alloc dma memory for BDQ page buffer list */
1240         qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1241         qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
1242         qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1243
1244         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1245                   qedi->rq_num_entries);
1246
1247         qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1248                                            qedi->bdq_pbl_mem_size,
1249                                            &qedi->bdq_pbl_dma, GFP_KERNEL);
1250         if (!qedi->bdq_pbl) {
1251                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1252                 return -ENOMEM;
1253         }
1254
1255         /*
1256          * Populate BDQ PBL with physical and virtual address of individual
1257          * BDQ buffers
1258          */
1259         pbl = (struct scsi_bd  *)qedi->bdq_pbl;
1260         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1261                 pbl->address.hi =
1262                                 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1263                 pbl->address.lo =
1264                                 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1265                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1266                           "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1267                           pbl, pbl->address.hi, pbl->address.lo, i);
1268                 pbl->opaque.hi = 0;
1269                 pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(i));
1270                 pbl++;
1271         }
1272
1273         /* Allocate list of PBL pages */
1274         qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev,
1275                                                 PAGE_SIZE,
1276                                                 &qedi->bdq_pbl_list_dma,
1277                                                 GFP_KERNEL);
1278         if (!qedi->bdq_pbl_list) {
1279                 QEDI_ERR(&qedi->dbg_ctx,
1280                          "Could not allocate list of PBL pages.\n");
1281                 return -ENOMEM;
1282         }
1283         memset(qedi->bdq_pbl_list, 0, PAGE_SIZE);
1284
1285         /*
1286          * Now populate PBL list with pages that contain pointers to the
1287          * individual buffers.
1288          */
1289         qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
1290         list = (u64 *)qedi->bdq_pbl_list;
1291         page = qedi->bdq_pbl_list_dma;
1292         for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1293                 *list = qedi->bdq_pbl_dma;
1294                 list++;
1295                 page += PAGE_SIZE;
1296         }
1297
1298         return 0;
1299 }
1300
1301 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1302 {
1303         u32 *list;
1304         int i;
1305         int status;
1306         u32 *pbl;
1307         dma_addr_t page;
1308         int num_pages;
1309
1310         /*
1311          * Number of global queues (CQ / RQ). This should
1312          * be <= number of available MSIX vectors for the PF
1313          */
1314         if (!qedi->num_queues) {
1315                 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1316                 return -ENOMEM;
1317         }
1318
1319         /* Make sure we allocated the PBL that will contain the physical
1320          * addresses of our queues
1321          */
1322         if (!qedi->p_cpuq) {
1323                 status = -EINVAL;
1324                 goto mem_alloc_failure;
1325         }
1326
1327         qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1328                                        qedi->num_queues), GFP_KERNEL);
1329         if (!qedi->global_queues) {
1330                 QEDI_ERR(&qedi->dbg_ctx,
1331                          "Unable to allocate global queues array ptr memory\n");
1332                 return -ENOMEM;
1333         }
1334         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1335                   "qedi->global_queues=%p.\n", qedi->global_queues);
1336
1337         /* Allocate DMA coherent buffers for BDQ */
1338         status = qedi_alloc_bdq(qedi);
1339         if (status)
1340                 goto mem_alloc_failure;
1341
1342         /* Allocate DMA coherent buffers for NVM_ISCSI_CFG */
1343         status = qedi_alloc_nvm_iscsi_cfg(qedi);
1344         if (status)
1345                 goto mem_alloc_failure;
1346
1347         /* Allocate a CQ and an associated PBL for each MSI-X
1348          * vector.
1349          */
1350         for (i = 0; i < qedi->num_queues; i++) {
1351                 qedi->global_queues[i] =
1352                                         kzalloc(sizeof(*qedi->global_queues[0]),
1353                                                 GFP_KERNEL);
1354                 if (!qedi->global_queues[i]) {
1355                         QEDI_ERR(&qedi->dbg_ctx,
1356                                  "Unable to allocation global queue %d.\n", i);
1357                         status = -ENOMEM;
1358                         goto mem_alloc_failure;
1359                 }
1360
1361                 qedi->global_queues[i]->cq_mem_size =
1362                     (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1363                 qedi->global_queues[i]->cq_mem_size =
1364                     (qedi->global_queues[i]->cq_mem_size +
1365                     (QEDI_PAGE_SIZE - 1));
1366
1367                 qedi->global_queues[i]->cq_pbl_size =
1368                     (qedi->global_queues[i]->cq_mem_size /
1369                     QEDI_PAGE_SIZE) * sizeof(void *);
1370                 qedi->global_queues[i]->cq_pbl_size =
1371                     (qedi->global_queues[i]->cq_pbl_size +
1372                     (QEDI_PAGE_SIZE - 1));
1373
1374                 qedi->global_queues[i]->cq =
1375                     dma_alloc_coherent(&qedi->pdev->dev,
1376                                        qedi->global_queues[i]->cq_mem_size,
1377                                        &qedi->global_queues[i]->cq_dma,
1378                                        GFP_KERNEL);
1379
1380                 if (!qedi->global_queues[i]->cq) {
1381                         QEDI_WARN(&qedi->dbg_ctx,
1382                                   "Could not allocate cq.\n");
1383                         status = -ENOMEM;
1384                         goto mem_alloc_failure;
1385                 }
1386                 memset(qedi->global_queues[i]->cq, 0,
1387                        qedi->global_queues[i]->cq_mem_size);
1388
1389                 qedi->global_queues[i]->cq_pbl =
1390                     dma_alloc_coherent(&qedi->pdev->dev,
1391                                        qedi->global_queues[i]->cq_pbl_size,
1392                                        &qedi->global_queues[i]->cq_pbl_dma,
1393                                        GFP_KERNEL);
1394
1395                 if (!qedi->global_queues[i]->cq_pbl) {
1396                         QEDI_WARN(&qedi->dbg_ctx,
1397                                   "Could not allocate cq PBL.\n");
1398                         status = -ENOMEM;
1399                         goto mem_alloc_failure;
1400                 }
1401                 memset(qedi->global_queues[i]->cq_pbl, 0,
1402                        qedi->global_queues[i]->cq_pbl_size);
1403
1404                 /* Create PBL */
1405                 num_pages = qedi->global_queues[i]->cq_mem_size /
1406                     QEDI_PAGE_SIZE;
1407                 page = qedi->global_queues[i]->cq_dma;
1408                 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1409
1410                 while (num_pages--) {
1411                         *pbl = (u32)page;
1412                         pbl++;
1413                         *pbl = (u32)((u64)page >> 32);
1414                         pbl++;
1415                         page += QEDI_PAGE_SIZE;
1416                 }
1417         }
1418
1419         list = (u32 *)qedi->p_cpuq;
1420
1421         /*
1422          * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1423          * CQ#1 PBL pointer, RQ#1 PBL pointer, etc.  Each PBL pointer points
1424          * to the physical address which contains an array of pointers to the
1425          * physical addresses of the specific queue pages.
1426          */
1427         for (i = 0; i < qedi->num_queues; i++) {
1428                 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1429                 list++;
1430                 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1431                 list++;
1432
1433                 *list = (u32)0;
1434                 list++;
1435                 *list = (u32)((u64)0 >> 32);
1436                 list++;
1437         }
1438
1439         return 0;
1440
1441 mem_alloc_failure:
1442         qedi_free_global_queues(qedi);
1443         return status;
1444 }
1445
1446 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1447 {
1448         int rval = 0;
1449         u32 *pbl;
1450         dma_addr_t page;
1451         int num_pages;
1452
1453         if (!ep)
1454                 return -EIO;
1455
1456         /* Calculate appropriate queue and PBL sizes */
1457         ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1458         ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1459
1460         ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1461         ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1462
1463         ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1464                                     &ep->sq_dma, GFP_KERNEL);
1465         if (!ep->sq) {
1466                 QEDI_WARN(&qedi->dbg_ctx,
1467                           "Could not allocate send queue.\n");
1468                 rval = -ENOMEM;
1469                 goto out;
1470         }
1471         memset(ep->sq, 0, ep->sq_mem_size);
1472
1473         ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1474                                         &ep->sq_pbl_dma, GFP_KERNEL);
1475         if (!ep->sq_pbl) {
1476                 QEDI_WARN(&qedi->dbg_ctx,
1477                           "Could not allocate send queue PBL.\n");
1478                 rval = -ENOMEM;
1479                 goto out_free_sq;
1480         }
1481         memset(ep->sq_pbl, 0, ep->sq_pbl_size);
1482
1483         /* Create PBL */
1484         num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1485         page = ep->sq_dma;
1486         pbl = (u32 *)ep->sq_pbl;
1487
1488         while (num_pages--) {
1489                 *pbl = (u32)page;
1490                 pbl++;
1491                 *pbl = (u32)((u64)page >> 32);
1492                 pbl++;
1493                 page += QEDI_PAGE_SIZE;
1494         }
1495
1496         return rval;
1497
1498 out_free_sq:
1499         dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1500                           ep->sq_dma);
1501 out:
1502         return rval;
1503 }
1504
1505 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1506 {
1507         if (ep->sq_pbl)
1508                 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1509                                   ep->sq_pbl_dma);
1510         if (ep->sq)
1511                 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1512                                   ep->sq_dma);
1513 }
1514
1515 int qedi_get_task_idx(struct qedi_ctx *qedi)
1516 {
1517         s16 tmp_idx;
1518
1519 again:
1520         tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1521                                       MAX_ISCSI_TASK_ENTRIES);
1522
1523         if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1524                 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1525                 tmp_idx = -1;
1526                 goto err_idx;
1527         }
1528
1529         if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1530                 goto again;
1531
1532 err_idx:
1533         return tmp_idx;
1534 }
1535
1536 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1537 {
1538         if (!test_and_clear_bit(idx, qedi->task_idx_map))
1539                 QEDI_ERR(&qedi->dbg_ctx,
1540                          "FW task context, already cleared, tid=0x%x\n", idx);
1541 }
1542
1543 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1544                          struct qedi_cmd *cmd)
1545 {
1546         qedi->itt_map[tid].itt = proto_itt;
1547         qedi->itt_map[tid].p_cmd = cmd;
1548
1549         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1550                   "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1551                   qedi->itt_map[tid].itt);
1552 }
1553
1554 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1555 {
1556         u16 i;
1557
1558         for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1559                 if (qedi->itt_map[i].itt == itt) {
1560                         *tid = i;
1561                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1562                                   "Ref itt=0x%x, found at tid=0x%x\n",
1563                                   itt, *tid);
1564                         return;
1565                 }
1566         }
1567
1568         WARN_ON(1);
1569 }
1570
1571 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1572 {
1573         *proto_itt = qedi->itt_map[tid].itt;
1574         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1575                   "Get itt map tid [0x%x with proto itt[0x%x]",
1576                   tid, *proto_itt);
1577 }
1578
1579 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1580 {
1581         struct qedi_cmd *cmd = NULL;
1582
1583         if (tid >= MAX_ISCSI_TASK_ENTRIES)
1584                 return NULL;
1585
1586         cmd = qedi->itt_map[tid].p_cmd;
1587         if (cmd->task_id != tid)
1588                 return NULL;
1589
1590         qedi->itt_map[tid].p_cmd = NULL;
1591
1592         return cmd;
1593 }
1594
1595 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1596 {
1597         qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1598                                 sizeof(struct qedi_itt_map), GFP_KERNEL);
1599         if (!qedi->itt_map) {
1600                 QEDI_ERR(&qedi->dbg_ctx,
1601                          "Unable to allocate itt map array memory\n");
1602                 return -ENOMEM;
1603         }
1604         return 0;
1605 }
1606
1607 static void qedi_free_itt(struct qedi_ctx *qedi)
1608 {
1609         kfree(qedi->itt_map);
1610 }
1611
1612 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1613         .rx_cb = qedi_ll2_rx,
1614         .tx_cb = NULL,
1615 };
1616
1617 static int qedi_percpu_io_thread(void *arg)
1618 {
1619         struct qedi_percpu_s *p = arg;
1620         struct qedi_work *work, *tmp;
1621         unsigned long flags;
1622         LIST_HEAD(work_list);
1623
1624         set_user_nice(current, -20);
1625
1626         while (!kthread_should_stop()) {
1627                 spin_lock_irqsave(&p->p_work_lock, flags);
1628                 while (!list_empty(&p->work_list)) {
1629                         list_splice_init(&p->work_list, &work_list);
1630                         spin_unlock_irqrestore(&p->p_work_lock, flags);
1631
1632                         list_for_each_entry_safe(work, tmp, &work_list, list) {
1633                                 list_del_init(&work->list);
1634                                 qedi_fp_process_cqes(work);
1635                                 if (!work->is_solicited)
1636                                         kfree(work);
1637                         }
1638                         cond_resched();
1639                         spin_lock_irqsave(&p->p_work_lock, flags);
1640                 }
1641                 set_current_state(TASK_INTERRUPTIBLE);
1642                 spin_unlock_irqrestore(&p->p_work_lock, flags);
1643                 schedule();
1644         }
1645         __set_current_state(TASK_RUNNING);
1646
1647         return 0;
1648 }
1649
1650 static int qedi_cpu_online(unsigned int cpu)
1651 {
1652         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1653         struct task_struct *thread;
1654
1655         thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1656                                         cpu_to_node(cpu),
1657                                         "qedi_thread/%d", cpu);
1658         if (IS_ERR(thread))
1659                 return PTR_ERR(thread);
1660
1661         kthread_bind(thread, cpu);
1662         p->iothread = thread;
1663         wake_up_process(thread);
1664         return 0;
1665 }
1666
1667 static int qedi_cpu_offline(unsigned int cpu)
1668 {
1669         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1670         struct qedi_work *work, *tmp;
1671         struct task_struct *thread;
1672
1673         spin_lock_bh(&p->p_work_lock);
1674         thread = p->iothread;
1675         p->iothread = NULL;
1676
1677         list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1678                 list_del_init(&work->list);
1679                 qedi_fp_process_cqes(work);
1680                 if (!work->is_solicited)
1681                         kfree(work);
1682         }
1683
1684         spin_unlock_bh(&p->p_work_lock);
1685         if (thread)
1686                 kthread_stop(thread);
1687         return 0;
1688 }
1689
1690 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1691 {
1692         struct qed_ll2_params params;
1693
1694         qedi_recover_all_conns(qedi);
1695
1696         qedi_ops->ll2->stop(qedi->cdev);
1697         qedi_ll2_free_skbs(qedi);
1698
1699         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1700                   qedi->ll2_mtu, mtu);
1701         memset(&params, 0, sizeof(params));
1702         qedi->ll2_mtu = mtu;
1703         params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1704         params.drop_ttl0_packets = 0;
1705         params.rx_vlan_stripping = 1;
1706         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1707         qedi_ops->ll2->start(qedi->cdev, &params);
1708 }
1709
1710 /**
1711  * qedi_get_nvram_block: - Scan through the iSCSI NVRAM block (while accounting
1712  * for gaps) for the matching absolute-pf-id of the QEDI device.
1713  */
1714 static struct nvm_iscsi_block *
1715 qedi_get_nvram_block(struct qedi_ctx *qedi)
1716 {
1717         int i;
1718         u8 pf;
1719         u32 flags;
1720         struct nvm_iscsi_block *block;
1721
1722         pf = qedi->dev_info.common.abs_pf_id;
1723         block = &qedi->iscsi_image->iscsi_cfg.block[0];
1724         for (i = 0; i < NUM_OF_ISCSI_PF_SUPPORTED; i++, block++) {
1725                 flags = ((block->id) & NVM_ISCSI_CFG_BLK_CTRL_FLAG_MASK) >>
1726                         NVM_ISCSI_CFG_BLK_CTRL_FLAG_OFFSET;
1727                 if (flags & (NVM_ISCSI_CFG_BLK_CTRL_FLAG_IS_NOT_EMPTY |
1728                                 NVM_ISCSI_CFG_BLK_CTRL_FLAG_PF_MAPPED) &&
1729                         (pf == (block->id & NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_MASK)
1730                                 >> NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_OFFSET))
1731                         return block;
1732         }
1733         return NULL;
1734 }
1735
1736 static ssize_t qedi_show_boot_eth_info(void *data, int type, char *buf)
1737 {
1738         struct qedi_ctx *qedi = data;
1739         struct nvm_iscsi_initiator *initiator;
1740         char *str = buf;
1741         int rc = 1;
1742         u32 ipv6_en, dhcp_en, ip_len;
1743         struct nvm_iscsi_block *block;
1744         char *fmt, *ip, *sub, *gw;
1745
1746         block = qedi_get_nvram_block(qedi);
1747         if (!block)
1748                 return 0;
1749
1750         initiator = &block->initiator;
1751         ipv6_en = block->generic.ctrl_flags &
1752                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
1753         dhcp_en = block->generic.ctrl_flags &
1754                   NVM_ISCSI_CFG_GEN_DHCP_TCPIP_CONFIG_ENABLED;
1755         /* Static IP assignments. */
1756         fmt = ipv6_en ? "%pI6\n" : "%pI4\n";
1757         ip = ipv6_en ? initiator->ipv6.addr.byte : initiator->ipv4.addr.byte;
1758         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
1759         sub = ipv6_en ? initiator->ipv6.subnet_mask.byte :
1760               initiator->ipv4.subnet_mask.byte;
1761         gw = ipv6_en ? initiator->ipv6.gateway.byte :
1762              initiator->ipv4.gateway.byte;
1763         /* DHCP IP adjustments. */
1764         fmt = dhcp_en ? "%s\n" : fmt;
1765         if (dhcp_en) {
1766                 ip = ipv6_en ? "0::0" : "0.0.0.0";
1767                 sub = ip;
1768                 gw = ip;
1769                 ip_len = ipv6_en ? 5 : 8;
1770         }
1771
1772         switch (type) {
1773         case ISCSI_BOOT_ETH_IP_ADDR:
1774                 rc = snprintf(str, ip_len, fmt, ip);
1775                 break;
1776         case ISCSI_BOOT_ETH_SUBNET_MASK:
1777                 rc = snprintf(str, ip_len, fmt, sub);
1778                 break;
1779         case ISCSI_BOOT_ETH_GATEWAY:
1780                 rc = snprintf(str, ip_len, fmt, gw);
1781                 break;
1782         case ISCSI_BOOT_ETH_FLAGS:
1783                 rc = snprintf(str, 3, "%hhd\n",
1784                               SYSFS_FLAG_FW_SEL_BOOT);
1785                 break;
1786         case ISCSI_BOOT_ETH_INDEX:
1787                 rc = snprintf(str, 3, "0\n");
1788                 break;
1789         case ISCSI_BOOT_ETH_MAC:
1790                 rc = sysfs_format_mac(str, qedi->mac, ETH_ALEN);
1791                 break;
1792         case ISCSI_BOOT_ETH_VLAN:
1793                 rc = snprintf(str, 12, "%d\n",
1794                               GET_FIELD2(initiator->generic_cont0,
1795                                          NVM_ISCSI_CFG_INITIATOR_VLAN));
1796                 break;
1797         case ISCSI_BOOT_ETH_ORIGIN:
1798                 if (dhcp_en)
1799                         rc = snprintf(str, 3, "3\n");
1800                 break;
1801         default:
1802                 rc = 0;
1803                 break;
1804         }
1805
1806         return rc;
1807 }
1808
1809 static umode_t qedi_eth_get_attr_visibility(void *data, int type)
1810 {
1811         int rc = 1;
1812
1813         switch (type) {
1814         case ISCSI_BOOT_ETH_FLAGS:
1815         case ISCSI_BOOT_ETH_MAC:
1816         case ISCSI_BOOT_ETH_INDEX:
1817         case ISCSI_BOOT_ETH_IP_ADDR:
1818         case ISCSI_BOOT_ETH_SUBNET_MASK:
1819         case ISCSI_BOOT_ETH_GATEWAY:
1820         case ISCSI_BOOT_ETH_ORIGIN:
1821         case ISCSI_BOOT_ETH_VLAN:
1822                 rc = 0444;
1823                 break;
1824         default:
1825                 rc = 0;
1826                 break;
1827         }
1828         return rc;
1829 }
1830
1831 static ssize_t qedi_show_boot_ini_info(void *data, int type, char *buf)
1832 {
1833         struct qedi_ctx *qedi = data;
1834         struct nvm_iscsi_initiator *initiator;
1835         char *str = buf;
1836         int rc;
1837         struct nvm_iscsi_block *block;
1838
1839         block = qedi_get_nvram_block(qedi);
1840         if (!block)
1841                 return 0;
1842
1843         initiator = &block->initiator;
1844
1845         switch (type) {
1846         case ISCSI_BOOT_INI_INITIATOR_NAME:
1847                 rc = sprintf(str, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
1848                              initiator->initiator_name.byte);
1849                 break;
1850         default:
1851                 rc = 0;
1852                 break;
1853         }
1854         return rc;
1855 }
1856
1857 static umode_t qedi_ini_get_attr_visibility(void *data, int type)
1858 {
1859         int rc;
1860
1861         switch (type) {
1862         case ISCSI_BOOT_INI_INITIATOR_NAME:
1863                 rc = 0444;
1864                 break;
1865         default:
1866                 rc = 0;
1867                 break;
1868         }
1869         return rc;
1870 }
1871
1872 static ssize_t
1873 qedi_show_boot_tgt_info(struct qedi_ctx *qedi, int type,
1874                         char *buf, enum qedi_nvm_tgts idx)
1875 {
1876         char *str = buf;
1877         int rc = 1;
1878         u32 ctrl_flags, ipv6_en, chap_en, mchap_en, ip_len;
1879         struct nvm_iscsi_block *block;
1880         char *chap_name, *chap_secret;
1881         char *mchap_name, *mchap_secret;
1882
1883         block = qedi_get_nvram_block(qedi);
1884         if (!block)
1885                 goto exit_show_tgt_info;
1886
1887         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
1888                   "Port:%d, tgt_idx:%d\n",
1889                   GET_FIELD2(block->id, NVM_ISCSI_CFG_BLK_MAPPED_PF_ID), idx);
1890
1891         ctrl_flags = block->target[idx].ctrl_flags &
1892                      NVM_ISCSI_CFG_TARGET_ENABLED;
1893
1894         if (!ctrl_flags) {
1895                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
1896                           "Target disabled\n");
1897                 goto exit_show_tgt_info;
1898         }
1899
1900         ipv6_en = block->generic.ctrl_flags &
1901                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
1902         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
1903         chap_en = block->generic.ctrl_flags &
1904                   NVM_ISCSI_CFG_GEN_CHAP_ENABLED;
1905         chap_name = chap_en ? block->initiator.chap_name.byte : NULL;
1906         chap_secret = chap_en ? block->initiator.chap_password.byte : NULL;
1907
1908         mchap_en = block->generic.ctrl_flags &
1909                   NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED;
1910         mchap_name = mchap_en ? block->target[idx].chap_name.byte : NULL;
1911         mchap_secret = mchap_en ? block->target[idx].chap_password.byte : NULL;
1912
1913         switch (type) {
1914         case ISCSI_BOOT_TGT_NAME:
1915                 rc = sprintf(str, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
1916                              block->target[idx].target_name.byte);
1917                 break;
1918         case ISCSI_BOOT_TGT_IP_ADDR:
1919                 if (ipv6_en)
1920                         rc = snprintf(str, ip_len, "%pI6\n",
1921                                       block->target[idx].ipv6_addr.byte);
1922                 else
1923                         rc = snprintf(str, ip_len, "%pI4\n",
1924                                       block->target[idx].ipv4_addr.byte);
1925                 break;
1926         case ISCSI_BOOT_TGT_PORT:
1927                 rc = snprintf(str, 12, "%d\n",
1928                               GET_FIELD2(block->target[idx].generic_cont0,
1929                                          NVM_ISCSI_CFG_TARGET_TCP_PORT));
1930                 break;
1931         case ISCSI_BOOT_TGT_LUN:
1932                 rc = snprintf(str, 22, "%.*d\n",
1933                               block->target[idx].lun.value[1],
1934                               block->target[idx].lun.value[0]);
1935                 break;
1936         case ISCSI_BOOT_TGT_CHAP_NAME:
1937                 rc = sprintf(str, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
1938                              chap_name);
1939                 break;
1940         case ISCSI_BOOT_TGT_CHAP_SECRET:
1941                 rc = sprintf(str, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
1942                              chap_secret);
1943                 break;
1944         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
1945                 rc = sprintf(str, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
1946                              mchap_name);
1947                 break;
1948         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
1949                 rc = sprintf(str, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
1950                              mchap_secret);
1951                 break;
1952         case ISCSI_BOOT_TGT_FLAGS:
1953                 rc = snprintf(str, 3, "%hhd\n", SYSFS_FLAG_FW_SEL_BOOT);
1954                 break;
1955         case ISCSI_BOOT_TGT_NIC_ASSOC:
1956                 rc = snprintf(str, 3, "0\n");
1957                 break;
1958         default:
1959                 rc = 0;
1960                 break;
1961         }
1962
1963 exit_show_tgt_info:
1964         return rc;
1965 }
1966
1967 static ssize_t qedi_show_boot_tgt_pri_info(void *data, int type, char *buf)
1968 {
1969         struct qedi_ctx *qedi = data;
1970
1971         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_PRI);
1972 }
1973
1974 static ssize_t qedi_show_boot_tgt_sec_info(void *data, int type, char *buf)
1975 {
1976         struct qedi_ctx *qedi = data;
1977
1978         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_SEC);
1979 }
1980
1981 static umode_t qedi_tgt_get_attr_visibility(void *data, int type)
1982 {
1983         int rc;
1984
1985         switch (type) {
1986         case ISCSI_BOOT_TGT_NAME:
1987         case ISCSI_BOOT_TGT_IP_ADDR:
1988         case ISCSI_BOOT_TGT_PORT:
1989         case ISCSI_BOOT_TGT_LUN:
1990         case ISCSI_BOOT_TGT_CHAP_NAME:
1991         case ISCSI_BOOT_TGT_CHAP_SECRET:
1992         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
1993         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
1994         case ISCSI_BOOT_TGT_NIC_ASSOC:
1995         case ISCSI_BOOT_TGT_FLAGS:
1996                 rc = 0444;
1997                 break;
1998         default:
1999                 rc = 0;
2000                 break;
2001         }
2002         return rc;
2003 }
2004
2005 static void qedi_boot_release(void *data)
2006 {
2007         struct qedi_ctx *qedi = data;
2008
2009         scsi_host_put(qedi->shost);
2010 }
2011
2012 static int qedi_get_boot_info(struct qedi_ctx *qedi)
2013 {
2014         int ret = 1;
2015         struct qedi_nvm_iscsi_image nvm_image;
2016
2017         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2018                   "Get NVM iSCSI CFG image\n");
2019         ret = qedi_ops->common->nvm_get_image(qedi->cdev,
2020                                               QED_NVM_IMAGE_ISCSI_CFG,
2021                                               (char *)qedi->iscsi_image,
2022                                               sizeof(nvm_image));
2023         if (ret)
2024                 QEDI_ERR(&qedi->dbg_ctx,
2025                          "Could not get NVM image. ret = %d\n", ret);
2026
2027         return ret;
2028 }
2029
2030 static int qedi_setup_boot_info(struct qedi_ctx *qedi)
2031 {
2032         struct iscsi_boot_kobj *boot_kobj;
2033
2034         if (qedi_get_boot_info(qedi))
2035                 return -EPERM;
2036
2037         qedi->boot_kset = iscsi_boot_create_host_kset(qedi->shost->host_no);
2038         if (!qedi->boot_kset)
2039                 goto kset_free;
2040
2041         if (!scsi_host_get(qedi->shost))
2042                 goto kset_free;
2043
2044         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 0, qedi,
2045                                              qedi_show_boot_tgt_pri_info,
2046                                              qedi_tgt_get_attr_visibility,
2047                                              qedi_boot_release);
2048         if (!boot_kobj)
2049                 goto put_host;
2050
2051         if (!scsi_host_get(qedi->shost))
2052                 goto kset_free;
2053
2054         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 1, qedi,
2055                                              qedi_show_boot_tgt_sec_info,
2056                                              qedi_tgt_get_attr_visibility,
2057                                              qedi_boot_release);
2058         if (!boot_kobj)
2059                 goto put_host;
2060
2061         if (!scsi_host_get(qedi->shost))
2062                 goto kset_free;
2063
2064         boot_kobj = iscsi_boot_create_initiator(qedi->boot_kset, 0, qedi,
2065                                                 qedi_show_boot_ini_info,
2066                                                 qedi_ini_get_attr_visibility,
2067                                                 qedi_boot_release);
2068         if (!boot_kobj)
2069                 goto put_host;
2070
2071         if (!scsi_host_get(qedi->shost))
2072                 goto kset_free;
2073
2074         boot_kobj = iscsi_boot_create_ethernet(qedi->boot_kset, 0, qedi,
2075                                                qedi_show_boot_eth_info,
2076                                                qedi_eth_get_attr_visibility,
2077                                                qedi_boot_release);
2078         if (!boot_kobj)
2079                 goto put_host;
2080
2081         return 0;
2082
2083 put_host:
2084         scsi_host_put(qedi->shost);
2085 kset_free:
2086         iscsi_boot_destroy_kset(qedi->boot_kset);
2087         return -ENOMEM;
2088 }
2089
2090 static void __qedi_remove(struct pci_dev *pdev, int mode)
2091 {
2092         struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2093         int rval;
2094
2095         if (qedi->tmf_thread) {
2096                 flush_workqueue(qedi->tmf_thread);
2097                 destroy_workqueue(qedi->tmf_thread);
2098                 qedi->tmf_thread = NULL;
2099         }
2100
2101         if (qedi->offload_thread) {
2102                 flush_workqueue(qedi->offload_thread);
2103                 destroy_workqueue(qedi->offload_thread);
2104                 qedi->offload_thread = NULL;
2105         }
2106
2107 #ifdef CONFIG_DEBUG_FS
2108         qedi_dbg_host_exit(&qedi->dbg_ctx);
2109 #endif
2110         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
2111                 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2112
2113         qedi_sync_free_irqs(qedi);
2114
2115         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2116                 qedi_ops->stop(qedi->cdev);
2117                 qedi_ops->ll2->stop(qedi->cdev);
2118         }
2119
2120         if (mode == QEDI_MODE_NORMAL)
2121                 qedi_free_iscsi_pf_param(qedi);
2122
2123         rval = qedi_ops->common->update_drv_state(qedi->cdev, false);
2124         if (rval)
2125                 QEDI_ERR(&qedi->dbg_ctx, "Failed to send drv state to MFW\n");
2126
2127         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2128                 qedi_ops->common->slowpath_stop(qedi->cdev);
2129                 qedi_ops->common->remove(qedi->cdev);
2130         }
2131
2132         qedi_destroy_fp(qedi);
2133
2134         if (mode == QEDI_MODE_NORMAL) {
2135                 qedi_release_cid_que(qedi);
2136                 qedi_cm_free_mem(qedi);
2137                 qedi_free_uio(qedi->udev);
2138                 qedi_free_itt(qedi);
2139
2140                 iscsi_host_remove(qedi->shost);
2141                 iscsi_host_free(qedi->shost);
2142
2143                 if (qedi->ll2_recv_thread) {
2144                         kthread_stop(qedi->ll2_recv_thread);
2145                         qedi->ll2_recv_thread = NULL;
2146                 }
2147                 qedi_ll2_free_skbs(qedi);
2148
2149                 if (qedi->boot_kset)
2150                         iscsi_boot_destroy_kset(qedi->boot_kset);
2151         }
2152 }
2153
2154 static int __qedi_probe(struct pci_dev *pdev, int mode)
2155 {
2156         struct qedi_ctx *qedi;
2157         struct qed_ll2_params params;
2158         u32 dp_module = 0;
2159         u8 dp_level = 0;
2160         bool is_vf = false;
2161         char host_buf[16];
2162         struct qed_link_params link_params;
2163         struct qed_slowpath_params sp_params;
2164         struct qed_probe_params qed_params;
2165         void *task_start, *task_end;
2166         int rc;
2167         u16 tmp;
2168
2169         if (mode != QEDI_MODE_RECOVERY) {
2170                 qedi = qedi_host_alloc(pdev);
2171                 if (!qedi) {
2172                         rc = -ENOMEM;
2173                         goto exit_probe;
2174                 }
2175         } else {
2176                 qedi = pci_get_drvdata(pdev);
2177         }
2178
2179         memset(&qed_params, 0, sizeof(qed_params));
2180         qed_params.protocol = QED_PROTOCOL_ISCSI;
2181         qed_params.dp_module = dp_module;
2182         qed_params.dp_level = dp_level;
2183         qed_params.is_vf = is_vf;
2184         qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
2185         if (!qedi->cdev) {
2186                 rc = -ENODEV;
2187                 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
2188                 goto free_host;
2189         }
2190
2191         atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2192
2193         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2194         if (rc)
2195                 goto free_host;
2196
2197         if (mode != QEDI_MODE_RECOVERY) {
2198                 rc = qedi_set_iscsi_pf_param(qedi);
2199                 if (rc) {
2200                         rc = -ENOMEM;
2201                         QEDI_ERR(&qedi->dbg_ctx,
2202                                  "Set iSCSI pf param fail\n");
2203                         goto free_host;
2204                 }
2205         }
2206
2207         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2208
2209         rc = qedi_prepare_fp(qedi);
2210         if (rc) {
2211                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
2212                 goto free_pf_params;
2213         }
2214
2215         /* Start the Slowpath-process */
2216         memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
2217         sp_params.int_mode = QED_INT_MODE_MSIX;
2218         sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
2219         sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
2220         sp_params.drv_rev = QEDI_DRIVER_REV_VER;
2221         sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
2222         strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
2223         rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
2224         if (rc) {
2225                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
2226                 goto stop_hw;
2227         }
2228
2229         /* update_pf_params needs to be called before and after slowpath
2230          * start
2231          */
2232         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2233
2234         rc = qedi_setup_int(qedi);
2235         if (rc)
2236                 goto stop_iscsi_func;
2237
2238         qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2239
2240         /* Learn information crucial for qedi to progress */
2241         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2242         if (rc)
2243                 goto stop_iscsi_func;
2244
2245         /* Record BDQ producer doorbell addresses */
2246         qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
2247         qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
2248         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2249                   "BDQ primary_prod=%p secondary_prod=%p.\n",
2250                   qedi->bdq_primary_prod,
2251                   qedi->bdq_secondary_prod);
2252
2253         /*
2254          * We need to write the number of BDs in the BDQ we've preallocated so
2255          * the f/w will do a prefetch and we'll get an unsolicited CQE when a
2256          * packet arrives.
2257          */
2258         qedi->bdq_prod_idx = QEDI_BDQ_NUM;
2259         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2260                   "Writing %d to primary and secondary BDQ doorbell registers.\n",
2261                   qedi->bdq_prod_idx);
2262         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
2263         tmp = readw(qedi->bdq_primary_prod);
2264         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
2265         tmp = readw(qedi->bdq_secondary_prod);
2266
2267         ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
2268         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
2269                   qedi->mac);
2270
2271         sprintf(host_buf, "host_%d", qedi->shost->host_no);
2272         qedi_ops->common->set_name(qedi->cdev, host_buf);
2273
2274         qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
2275
2276         memset(&params, 0, sizeof(params));
2277         params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
2278         qedi->ll2_mtu = DEF_PATH_MTU;
2279         params.drop_ttl0_packets = 0;
2280         params.rx_vlan_stripping = 1;
2281         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
2282
2283         if (mode != QEDI_MODE_RECOVERY) {
2284                 /* set up rx path */
2285                 INIT_LIST_HEAD(&qedi->ll2_skb_list);
2286                 spin_lock_init(&qedi->ll2_lock);
2287                 /* start qedi context */
2288                 spin_lock_init(&qedi->hba_lock);
2289                 spin_lock_init(&qedi->task_idx_lock);
2290         }
2291         qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
2292         qedi_ops->ll2->start(qedi->cdev, &params);
2293
2294         if (mode != QEDI_MODE_RECOVERY) {
2295                 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
2296                                                     (void *)qedi,
2297                                                     "qedi_ll2_thread");
2298         }
2299
2300         rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
2301                              qedi, qedi_iscsi_event_cb);
2302         if (rc) {
2303                 rc = -ENODEV;
2304                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
2305                 goto stop_slowpath;
2306         }
2307
2308         task_start = qedi_get_task_mem(&qedi->tasks, 0);
2309         task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
2310         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2311                   "Task context start=%p, end=%p block_size=%u.\n",
2312                    task_start, task_end, qedi->tasks.size);
2313
2314         memset(&link_params, 0, sizeof(link_params));
2315         link_params.link_up = true;
2316         rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
2317         if (rc) {
2318                 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
2319                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2320         }
2321
2322 #ifdef CONFIG_DEBUG_FS
2323         qedi_dbg_host_init(&qedi->dbg_ctx, &qedi_debugfs_ops,
2324                            &qedi_dbg_fops);
2325 #endif
2326         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2327                   "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
2328                   QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
2329                   FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
2330
2331         if (mode == QEDI_MODE_NORMAL) {
2332                 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
2333                         QEDI_ERR(&qedi->dbg_ctx,
2334                                  "Could not add iscsi host\n");
2335                         rc = -ENOMEM;
2336                         goto remove_host;
2337                 }
2338
2339                 /* Allocate uio buffers */
2340                 rc = qedi_alloc_uio_rings(qedi);
2341                 if (rc) {
2342                         QEDI_ERR(&qedi->dbg_ctx,
2343                                  "UIO alloc ring failed err=%d\n", rc);
2344                         goto remove_host;
2345                 }
2346
2347                 rc = qedi_init_uio(qedi);
2348                 if (rc) {
2349                         QEDI_ERR(&qedi->dbg_ctx,
2350                                  "UIO init failed, err=%d\n", rc);
2351                         goto free_uio;
2352                 }
2353
2354                 /* host the array on iscsi_conn */
2355                 rc = qedi_setup_cid_que(qedi);
2356                 if (rc) {
2357                         QEDI_ERR(&qedi->dbg_ctx,
2358                                  "Could not setup cid que\n");
2359                         goto free_uio;
2360                 }
2361
2362                 rc = qedi_cm_alloc_mem(qedi);
2363                 if (rc) {
2364                         QEDI_ERR(&qedi->dbg_ctx,
2365                                  "Could not alloc cm memory\n");
2366                         goto free_cid_que;
2367                 }
2368
2369                 rc = qedi_alloc_itt(qedi);
2370                 if (rc) {
2371                         QEDI_ERR(&qedi->dbg_ctx,
2372                                  "Could not alloc itt memory\n");
2373                         goto free_cid_que;
2374                 }
2375
2376                 sprintf(host_buf, "host_%d", qedi->shost->host_no);
2377                 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
2378                 if (!qedi->tmf_thread) {
2379                         QEDI_ERR(&qedi->dbg_ctx,
2380                                  "Unable to start tmf thread!\n");
2381                         rc = -ENODEV;
2382                         goto free_cid_que;
2383                 }
2384
2385                 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
2386                 qedi->offload_thread = create_workqueue(host_buf);
2387                 if (!qedi->offload_thread) {
2388                         QEDI_ERR(&qedi->dbg_ctx,
2389                                  "Unable to start offload thread!\n");
2390                         rc = -ENODEV;
2391                         goto free_tmf_thread;
2392                 }
2393
2394                 /* F/w needs 1st task context memory entry for performance */
2395                 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
2396                 atomic_set(&qedi->num_offloads, 0);
2397
2398                 if (qedi_setup_boot_info(qedi))
2399                         QEDI_ERR(&qedi->dbg_ctx,
2400                                  "No iSCSI boot target configured\n");
2401
2402                 rc = qedi_ops->common->update_drv_state(qedi->cdev, true);
2403                 if (rc)
2404                         QEDI_ERR(&qedi->dbg_ctx,
2405                                  "Failed to send drv state to MFW\n");
2406
2407         }
2408
2409         return 0;
2410
2411 free_tmf_thread:
2412         destroy_workqueue(qedi->tmf_thread);
2413 free_cid_que:
2414         qedi_release_cid_que(qedi);
2415 free_uio:
2416         qedi_free_uio(qedi->udev);
2417 remove_host:
2418 #ifdef CONFIG_DEBUG_FS
2419         qedi_dbg_host_exit(&qedi->dbg_ctx);
2420 #endif
2421         iscsi_host_remove(qedi->shost);
2422 stop_iscsi_func:
2423         qedi_ops->stop(qedi->cdev);
2424 stop_slowpath:
2425         qedi_ops->common->slowpath_stop(qedi->cdev);
2426 stop_hw:
2427         qedi_ops->common->remove(qedi->cdev);
2428 free_pf_params:
2429         qedi_free_iscsi_pf_param(qedi);
2430 free_host:
2431         iscsi_host_free(qedi->shost);
2432 exit_probe:
2433         return rc;
2434 }
2435
2436 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2437 {
2438         return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2439 }
2440
2441 static void qedi_remove(struct pci_dev *pdev)
2442 {
2443         __qedi_remove(pdev, QEDI_MODE_NORMAL);
2444 }
2445
2446 static struct pci_device_id qedi_pci_tbl[] = {
2447         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2448         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
2449         { 0 },
2450 };
2451 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2452
2453 static enum cpuhp_state qedi_cpuhp_state;
2454
2455 static struct pci_driver qedi_pci_driver = {
2456         .name = QEDI_MODULE_NAME,
2457         .id_table = qedi_pci_tbl,
2458         .probe = qedi_probe,
2459         .remove = qedi_remove,
2460 };
2461
2462 static int __init qedi_init(void)
2463 {
2464         struct qedi_percpu_s *p;
2465         int cpu, rc = 0;
2466
2467         qedi_ops = qed_get_iscsi_ops();
2468         if (!qedi_ops) {
2469                 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2470                 return -EINVAL;
2471         }
2472
2473 #ifdef CONFIG_DEBUG_FS
2474         qedi_dbg_init("qedi");
2475 #endif
2476
2477         qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2478         if (!qedi_scsi_transport) {
2479                 QEDI_ERR(NULL, "Could not register qedi transport");
2480                 rc = -ENOMEM;
2481                 goto exit_qedi_init_1;
2482         }
2483
2484         for_each_possible_cpu(cpu) {
2485                 p = &per_cpu(qedi_percpu, cpu);
2486                 INIT_LIST_HEAD(&p->work_list);
2487                 spin_lock_init(&p->p_work_lock);
2488                 p->iothread = NULL;
2489         }
2490
2491         rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2492                                qedi_cpu_online, qedi_cpu_offline);
2493         if (rc < 0)
2494                 goto exit_qedi_init_2;
2495         qedi_cpuhp_state = rc;
2496
2497         rc = pci_register_driver(&qedi_pci_driver);
2498         if (rc) {
2499                 QEDI_ERR(NULL, "Failed to register driver\n");
2500                 goto exit_qedi_hp;
2501         }
2502
2503         return 0;
2504
2505 exit_qedi_hp:
2506         cpuhp_remove_state(qedi_cpuhp_state);
2507 exit_qedi_init_2:
2508         iscsi_unregister_transport(&qedi_iscsi_transport);
2509 exit_qedi_init_1:
2510 #ifdef CONFIG_DEBUG_FS
2511         qedi_dbg_exit();
2512 #endif
2513         qed_put_iscsi_ops();
2514         return rc;
2515 }
2516
2517 static void __exit qedi_cleanup(void)
2518 {
2519         pci_unregister_driver(&qedi_pci_driver);
2520         cpuhp_remove_state(qedi_cpuhp_state);
2521         iscsi_unregister_transport(&qedi_iscsi_transport);
2522
2523 #ifdef CONFIG_DEBUG_FS
2524         qedi_dbg_exit();
2525 #endif
2526         qed_put_iscsi_ops();
2527 }
2528
2529 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2530 MODULE_LICENSE("GPL");
2531 MODULE_AUTHOR("QLogic Corporation");
2532 MODULE_VERSION(QEDI_MODULE_VERSION);
2533 module_init(qedi_init);
2534 module_exit(qedi_cleanup);