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