drivers/scsi/qedi/qedi_main.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * QLogic iSCSI Offload Driver
   4  * Copyright (c) 2016 Cavium Inc.
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/pci.h>
   9 #include <linux/kernel.h>
  10 #include <linux/if_arp.h>
  11 #include <scsi/iscsi_if.h>
  12 #include <linux/inet.h>
  13 #include <net/arp.h>
  14 #include <linux/list.h>
  15 #include <linux/kthread.h>
  16 #include <linux/mm.h>
  17 #include <linux/if_vlan.h>
  18 #include <linux/cpu.h>
  19 #include <linux/iscsi_boot_sysfs.h>
  20
  21 #include <scsi/scsi_cmnd.h>
  22 #include <scsi/scsi_device.h>
  23 #include <scsi/scsi_eh.h>
  24 #include <scsi/scsi_host.h>
  25 #include <scsi/scsi.h>
  26
  27 #include "qedi.h"
  28 #include "qedi_gbl.h"
  29 #include "qedi_iscsi.h"
  30
  31 static uint qedi_fw_debug;
  32 module_param(qedi_fw_debug, uint, 0644);
  33 MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
  34
  35 uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
  36 module_param(qedi_dbg_log, uint, 0644);
  37 MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
  38
  39 uint qedi_io_tracing;
  40 module_param(qedi_io_tracing, uint, 0644);
  41 MODULE_PARM_DESC(qedi_io_tracing,
  42                  " Enable logging of SCSI requests/completions into trace buffer. (default off).");
  43
  44 uint qedi_ll2_buf_size = 0x400;
  45 module_param(qedi_ll2_buf_size, uint, 0644);
  46 MODULE_PARM_DESC(qedi_ll2_buf_size,
  47                  "parameter to set ping packet size, default - 0x400, Jumbo packets - 0x2400.");
  48
  49 const struct qed_iscsi_ops *qedi_ops;
  50 static struct scsi_transport_template *qedi_scsi_transport;
  51 static struct pci_driver qedi_pci_driver;
  52 static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
  53 static LIST_HEAD(qedi_udev_list);
  54 /* Static function declaration */
  55 static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
  56 static void qedi_free_global_queues(struct qedi_ctx *qedi);
  57 static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
  58 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
  59 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
  60 static struct nvm_iscsi_block *qedi_get_nvram_block(struct qedi_ctx *qedi);
  61
  62 static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
  63 {
  64         struct qedi_ctx *qedi;
  65         struct qedi_endpoint *qedi_ep;
  66         struct iscsi_eqe_data *data;
  67         int rval = 0;
  68
  69         if (!context || !fw_handle) {
  70                 QEDI_ERR(NULL, "Recv event with ctx NULL\n");
  71                 return -EINVAL;
  72         }
  73
  74         qedi = (struct qedi_ctx *)context;
  75         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  76                   "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
  77
  78         data = (struct iscsi_eqe_data *)fw_handle;
  79         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  80                   "icid=0x%x conn_id=0x%x err-code=0x%x error-pdu-opcode-reserved=0x%x\n",
  81                    data->icid, data->conn_id, data->error_code,
  82                    data->error_pdu_opcode_reserved);
  83
  84         qedi_ep = qedi->ep_tbl[data->icid];
  85
  86         if (!qedi_ep) {
  87                 QEDI_WARN(&qedi->dbg_ctx,
  88                           "Cannot process event, ep already disconnected, cid=0x%x\n",
  89                            data->icid);
  90                 WARN_ON(1);
  91                 return -ENODEV;
  92         }
  93
  94         switch (fw_event_code) {
  95         case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
  96                 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
  97                         qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
  98
  99                 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
 100                 break;
 101         case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
 102                 qedi_ep->state = EP_STATE_DISCONN_COMPL;
 103                 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
 104                 break;
 105         case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
 106                 qedi_process_iscsi_error(qedi_ep, data);
 107                 break;
 108         case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
 109         case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
 110         case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
 111         case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
 112         case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
 113         case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
 114         case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
 115                 qedi_process_tcp_error(qedi_ep, data);
 116                 break;
 117         default:
 118                 QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
 119                          fw_event_code);
 120         }
 121
 122         return rval;
 123 }
 124
 125 static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
 126 {
 127         struct qedi_uio_dev *udev = uinfo->priv;
 128         struct qedi_ctx *qedi = udev->qedi;
 129
 130         if (!capable(CAP_NET_ADMIN))
 131                 return -EPERM;
 132
 133         if (udev->uio_dev != -1)
 134                 return -EBUSY;
 135
 136         rtnl_lock();
 137         udev->uio_dev = iminor(inode);
 138         qedi_reset_uio_rings(udev);
 139         set_bit(UIO_DEV_OPENED, &qedi->flags);
 140         rtnl_unlock();
 141
 142         return 0;
 143 }
 144
 145 static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
 146 {
 147         struct qedi_uio_dev *udev = uinfo->priv;
 148         struct qedi_ctx *qedi = udev->qedi;
 149
 150         udev->uio_dev = -1;
 151         clear_bit(UIO_DEV_OPENED, &qedi->flags);
 152         qedi_ll2_free_skbs(qedi);
 153         return 0;
 154 }
 155
 156 static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
 157 {
 158         if (udev->uctrl) {
 159                 free_page((unsigned long)udev->uctrl);
 160                 udev->uctrl = NULL;
 161         }
 162
 163         if (udev->ll2_ring) {
 164                 free_page((unsigned long)udev->ll2_ring);
 165                 udev->ll2_ring = NULL;
 166         }
 167
 168         if (udev->ll2_buf) {
 169                 free_pages((unsigned long)udev->ll2_buf, 2);
 170                 udev->ll2_buf = NULL;
 171         }
 172 }
 173
 174 static void __qedi_free_uio(struct qedi_uio_dev *udev)
 175 {
 176         uio_unregister_device(&udev->qedi_uinfo);
 177
 178         __qedi_free_uio_rings(udev);
 179
 180         pci_dev_put(udev->pdev);
 181         kfree(udev);
 182 }
 183
 184 static void qedi_free_uio(struct qedi_uio_dev *udev)
 185 {
 186         if (!udev)
 187                 return;
 188
 189         list_del_init(&udev->list);
 190         __qedi_free_uio(udev);
 191 }
 192
 193 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
 194 {
 195         struct qedi_ctx *qedi = NULL;
 196         struct qedi_uio_ctrl *uctrl = NULL;
 197
 198         qedi = udev->qedi;
 199         uctrl = udev->uctrl;
 200
 201         spin_lock_bh(&qedi->ll2_lock);
 202         uctrl->host_rx_cons = 0;
 203         uctrl->hw_rx_prod = 0;
 204         uctrl->hw_rx_bd_prod = 0;
 205         uctrl->host_rx_bd_cons = 0;
 206
 207         memset(udev->ll2_ring, 0, udev->ll2_ring_size);
 208         memset(udev->ll2_buf, 0, udev->ll2_buf_size);
 209         spin_unlock_bh(&qedi->ll2_lock);
 210 }
 211
 212 static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
 213 {
 214         int rc = 0;
 215
 216         if (udev->ll2_ring || udev->ll2_buf)
 217                 return rc;
 218
 219         /* Memory for control area.  */
 220         udev->uctrl = (void *)get_zeroed_page(GFP_KERNEL);
 221         if (!udev->uctrl)
 222                 return -ENOMEM;
 223
 224         /* Allocating memory for LL2 ring  */
 225         udev->ll2_ring_size = QEDI_PAGE_SIZE;
 226         udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
 227         if (!udev->ll2_ring) {
 228                 rc = -ENOMEM;
 229                 goto exit_alloc_ring;
 230         }
 231
 232         /* Allocating memory for Tx/Rx pkt buffer */
 233         udev->ll2_buf_size = TX_RX_RING * qedi_ll2_buf_size;
 234         udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
 235         udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
 236                                                  __GFP_ZERO, 2);
 237         if (!udev->ll2_buf) {
 238                 rc = -ENOMEM;
 239                 goto exit_alloc_buf;
 240         }
 241         return rc;
 242
 243 exit_alloc_buf:
 244         free_page((unsigned long)udev->ll2_ring);
 245         udev->ll2_ring = NULL;
 246 exit_alloc_ring:
 247         return rc;
 248 }
 249
 250 static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
 251 {
 252         struct qedi_uio_dev *udev = NULL;
 253         int rc = 0;
 254
 255         list_for_each_entry(udev, &qedi_udev_list, list) {
 256                 if (udev->pdev == qedi->pdev) {
 257                         udev->qedi = qedi;
 258                         if (__qedi_alloc_uio_rings(udev)) {
 259                                 udev->qedi = NULL;
 260                                 return -ENOMEM;
 261                         }
 262                         qedi->udev = udev;
 263                         return 0;
 264                 }
 265         }
 266
 267         udev = kzalloc(sizeof(*udev), GFP_KERNEL);
 268         if (!udev) {
 269                 rc = -ENOMEM;
 270                 goto err_udev;
 271         }
 272
 273         udev->uio_dev = -1;
 274
 275         udev->qedi = qedi;
 276         udev->pdev = qedi->pdev;
 277
 278         rc = __qedi_alloc_uio_rings(udev);
 279         if (rc)
 280                 goto err_uctrl;
 281
 282         list_add(&udev->list, &qedi_udev_list);
 283
 284         pci_dev_get(udev->pdev);
 285         qedi->udev = udev;
 286
 287         udev->tx_pkt = udev->ll2_buf;
 288         udev->rx_pkt = udev->ll2_buf + qedi_ll2_buf_size;
 289         return 0;
 290
 291  err_uctrl:
 292         kfree(udev);
 293  err_udev:
 294         return -ENOMEM;
 295 }
 296
 297 static int qedi_init_uio(struct qedi_ctx *qedi)
 298 {
 299         struct qedi_uio_dev *udev = qedi->udev;
 300         struct uio_info *uinfo;
 301         int ret = 0;
 302
 303         if (!udev)
 304                 return -ENOMEM;
 305
 306         uinfo = &udev->qedi_uinfo;
 307
 308         uinfo->mem[0].addr = (unsigned long)udev->uctrl;
 309         uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
 310         uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
 311
 312         uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
 313         uinfo->mem[1].size = udev->ll2_ring_size;
 314         uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
 315
 316         uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
 317         uinfo->mem[2].size = udev->ll2_buf_size;
 318         uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
 319
 320         uinfo->name = "qedi_uio";
 321         uinfo->version = QEDI_MODULE_VERSION;
 322         uinfo->irq = UIO_IRQ_CUSTOM;
 323
 324         uinfo->open = qedi_uio_open;
 325         uinfo->release = qedi_uio_close;
 326
 327         if (udev->uio_dev == -1) {
 328                 if (!uinfo->priv) {
 329                         uinfo->priv = udev;
 330
 331                         ret = uio_register_device(&udev->pdev->dev, uinfo);
 332                         if (ret) {
 333                                 QEDI_ERR(&qedi->dbg_ctx,
 334                                          "UIO registration failed\n");
 335                         }
 336                 }
 337         }
 338
 339         return ret;
 340 }
 341
 342 static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
 343                                   struct qed_sb_info *sb_info, u16 sb_id)
 344 {
 345         struct status_block_e4 *sb_virt;
 346         dma_addr_t sb_phys;
 347         int ret;
 348
 349         sb_virt = dma_alloc_coherent(&qedi->pdev->dev,
 350                                      sizeof(struct status_block_e4), &sb_phys,
 351                                      GFP_KERNEL);
 352         if (!sb_virt) {
 353                 QEDI_ERR(&qedi->dbg_ctx,
 354                          "Status block allocation failed for id = %d.\n",
 355                           sb_id);
 356                 return -ENOMEM;
 357         }
 358
 359         ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
 360                                        sb_id, QED_SB_TYPE_STORAGE);
 361         if (ret) {
 362                 QEDI_ERR(&qedi->dbg_ctx,
 363                          "Status block initialization failed for id = %d.\n",
 364                           sb_id);
 365                 return ret;
 366         }
 367
 368         return 0;
 369 }
 370
 371 static void qedi_free_sb(struct qedi_ctx *qedi)
 372 {
 373         struct qed_sb_info *sb_info;
 374         int id;
 375
 376         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 377                 sb_info = &qedi->sb_array[id];
 378                 if (sb_info->sb_virt)
 379                         dma_free_coherent(&qedi->pdev->dev,
 380                                           sizeof(*sb_info->sb_virt),
 381                                           (void *)sb_info->sb_virt,
 382                                           sb_info->sb_phys);
 383         }
 384 }
 385
 386 static void qedi_free_fp(struct qedi_ctx *qedi)
 387 {
 388         kfree(qedi->fp_array);
 389         kfree(qedi->sb_array);
 390 }
 391
 392 static void qedi_destroy_fp(struct qedi_ctx *qedi)
 393 {
 394         qedi_free_sb(qedi);
 395         qedi_free_fp(qedi);
 396 }
 397
 398 static int qedi_alloc_fp(struct qedi_ctx *qedi)
 399 {
 400         int ret = 0;
 401
 402         qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
 403                                  sizeof(struct qedi_fastpath), GFP_KERNEL);
 404         if (!qedi->fp_array) {
 405                 QEDI_ERR(&qedi->dbg_ctx,
 406                          "fastpath fp array allocation failed.\n");
 407                 return -ENOMEM;
 408         }
 409
 410         qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
 411                                  sizeof(struct qed_sb_info), GFP_KERNEL);
 412         if (!qedi->sb_array) {
 413                 QEDI_ERR(&qedi->dbg_ctx,
 414                          "fastpath sb array allocation failed.\n");
 415                 ret = -ENOMEM;
 416                 goto free_fp;
 417         }
 418
 419         return ret;
 420
 421 free_fp:
 422         qedi_free_fp(qedi);
 423         return ret;
 424 }
 425
 426 static void qedi_int_fp(struct qedi_ctx *qedi)
 427 {
 428         struct qedi_fastpath *fp;
 429         int id;
 430
 431         memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
 432                sizeof(*qedi->fp_array));
 433         memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
 434                sizeof(*qedi->sb_array));
 435
 436         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 437                 fp = &qedi->fp_array[id];
 438                 fp->sb_info = &qedi->sb_array[id];
 439                 fp->sb_id = id;
 440                 fp->qedi = qedi;
 441                 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
 442                          "qedi", id);
 443
 444                 /* fp_array[i] ---- irq cookie
 445                  * So init data which is needed in int ctx
 446                  */
 447         }
 448 }
 449
 450 static int qedi_prepare_fp(struct qedi_ctx *qedi)
 451 {
 452         struct qedi_fastpath *fp;
 453         int id, ret = 0;
 454
 455         ret = qedi_alloc_fp(qedi);
 456         if (ret)
 457                 goto err;
 458
 459         qedi_int_fp(qedi);
 460
 461         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 462                 fp = &qedi->fp_array[id];
 463                 ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
 464                 if (ret) {
 465                         QEDI_ERR(&qedi->dbg_ctx,
 466                                  "SB allocation and initialization failed.\n");
 467                         ret = -EIO;
 468                         goto err_init;
 469                 }
 470         }
 471
 472         return 0;
 473
 474 err_init:
 475         qedi_free_sb(qedi);
 476         qedi_free_fp(qedi);
 477 err:
 478         return ret;
 479 }
 480
 481 static int qedi_setup_cid_que(struct qedi_ctx *qedi)
 482 {
 483         int i;
 484
 485         qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
 486                                                    sizeof(u32), GFP_KERNEL);
 487         if (!qedi->cid_que.cid_que_base)
 488                 return -ENOMEM;
 489
 490         qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
 491                                                    sizeof(struct qedi_conn *),
 492                                                    GFP_KERNEL);
 493         if (!qedi->cid_que.conn_cid_tbl) {
 494                 kfree(qedi->cid_que.cid_que_base);
 495                 qedi->cid_que.cid_que_base = NULL;
 496                 return -ENOMEM;
 497         }
 498
 499         qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
 500         qedi->cid_que.cid_q_prod_idx = 0;
 501         qedi->cid_que.cid_q_cons_idx = 0;
 502         qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
 503         qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
 504
 505         for (i = 0; i < qedi->max_active_conns; i++) {
 506                 qedi->cid_que.cid_que[i] = i;
 507                 qedi->cid_que.conn_cid_tbl[i] = NULL;
 508         }
 509
 510         return 0;
 511 }
 512
 513 static void qedi_release_cid_que(struct qedi_ctx *qedi)
 514 {
 515         kfree(qedi->cid_que.cid_que_base);
 516         qedi->cid_que.cid_que_base = NULL;
 517
 518         kfree(qedi->cid_que.conn_cid_tbl);
 519         qedi->cid_que.conn_cid_tbl = NULL;
 520 }
 521
 522 static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
 523                             u16 start_id, u16 next)
 524 {
 525         id_tbl->start = start_id;
 526         id_tbl->max = size;
 527         id_tbl->next = next;
 528         spin_lock_init(&id_tbl->lock);
 529         id_tbl->table = kcalloc(BITS_TO_LONGS(size), sizeof(long), GFP_KERNEL);
 530         if (!id_tbl->table)
 531                 return -ENOMEM;
 532
 533         return 0;
 534 }
 535
 536 static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
 537 {
 538         kfree(id_tbl->table);
 539         id_tbl->table = NULL;
 540 }
 541
 542 int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
 543 {
 544         int ret = -1;
 545
 546         id -= id_tbl->start;
 547         if (id >= id_tbl->max)
 548                 return ret;
 549
 550         spin_lock(&id_tbl->lock);
 551         if (!test_bit(id, id_tbl->table)) {
 552                 set_bit(id, id_tbl->table);
 553                 ret = 0;
 554         }
 555         spin_unlock(&id_tbl->lock);
 556         return ret;
 557 }
 558
 559 u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
 560 {
 561         u16 id;
 562
 563         spin_lock(&id_tbl->lock);
 564         id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
 565         if (id >= id_tbl->max) {
 566                 id = QEDI_LOCAL_PORT_INVALID;
 567                 if (id_tbl->next != 0) {
 568                         id = find_first_zero_bit(id_tbl->table, id_tbl->next);
 569                         if (id >= id_tbl->next)
 570                                 id = QEDI_LOCAL_PORT_INVALID;
 571                 }
 572         }
 573
 574         if (id < id_tbl->max) {
 575                 set_bit(id, id_tbl->table);
 576                 id_tbl->next = (id + 1) & (id_tbl->max - 1);
 577                 id += id_tbl->start;
 578         }
 579
 580         spin_unlock(&id_tbl->lock);
 581
 582         return id;
 583 }
 584
 585 void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
 586 {
 587         if (id == QEDI_LOCAL_PORT_INVALID)
 588                 return;
 589
 590         id -= id_tbl->start;
 591         if (id >= id_tbl->max)
 592                 return;
 593
 594         clear_bit(id, id_tbl->table);
 595 }
 596
 597 static void qedi_cm_free_mem(struct qedi_ctx *qedi)
 598 {
 599         kfree(qedi->ep_tbl);
 600         qedi->ep_tbl = NULL;
 601         qedi_free_id_tbl(&qedi->lcl_port_tbl);
 602 }
 603
 604 static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
 605 {
 606         u16 port_id;
 607
 608         qedi->ep_tbl = kzalloc((qedi->max_active_conns *
 609                                 sizeof(struct qedi_endpoint *)), GFP_KERNEL);
 610         if (!qedi->ep_tbl)
 611                 return -ENOMEM;
 612         port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
 613         if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
 614                              QEDI_LOCAL_PORT_MIN, port_id)) {
 615                 qedi_cm_free_mem(qedi);
 616                 return -ENOMEM;
 617         }
 618
 619         return 0;
 620 }
 621
 622 static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
 623 {
 624         struct Scsi_Host *shost;
 625         struct qedi_ctx *qedi = NULL;
 626
 627         shost = iscsi_host_alloc(&qedi_host_template,
 628                                  sizeof(struct qedi_ctx), 0);
 629         if (!shost) {
 630                 QEDI_ERR(NULL, "Could not allocate shost\n");
 631                 goto exit_setup_shost;
 632         }
 633
 634         shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA;
 635         shost->max_channel = 0;
 636         shost->max_lun = ~0;
 637         shost->max_cmd_len = 16;
 638         shost->transportt = qedi_scsi_transport;
 639
 640         qedi = iscsi_host_priv(shost);
 641         memset(qedi, 0, sizeof(*qedi));
 642         qedi->shost = shost;
 643         qedi->dbg_ctx.host_no = shost->host_no;
 644         qedi->pdev = pdev;
 645         qedi->dbg_ctx.pdev = pdev;
 646         qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
 647         qedi->max_sqes = QEDI_SQ_SIZE;
 648
 649         shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
 650
 651         pci_set_drvdata(pdev, qedi);
 652
 653 exit_setup_shost:
 654         return qedi;
 655 }
 656
 657 static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
 658 {
 659         struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
 660         struct qedi_uio_dev *udev;
 661         struct qedi_uio_ctrl *uctrl;
 662         struct skb_work_list *work;
 663         struct ethhdr *eh;
 664
 665         if (!qedi) {
 666                 QEDI_ERR(NULL, "qedi is NULL\n");
 667                 return -1;
 668         }
 669
 670         if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
 671                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
 672                           "UIO DEV is not opened\n");
 673                 kfree_skb(skb);
 674                 return 0;
 675         }
 676
 677         eh = (struct ethhdr *)skb->data;
 678         /* Undo VLAN encapsulation */
 679         if (eh->h_proto == htons(ETH_P_8021Q)) {
 680                 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
 681                 eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
 682                 skb_reset_mac_header(skb);
 683         }
 684
 685         /* Filter out non FIP/FCoE frames here to free them faster */
 686         if (eh->h_proto != htons(ETH_P_ARP) &&
 687             eh->h_proto != htons(ETH_P_IP) &&
 688             eh->h_proto != htons(ETH_P_IPV6)) {
 689                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
 690                           "Dropping frame ethertype [0x%x] len [0x%x].\n",
 691                           eh->h_proto, skb->len);
 692                 kfree_skb(skb);
 693                 return 0;
 694         }
 695
 696         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
 697                   "Allowed frame ethertype [0x%x] len [0x%x].\n",
 698                   eh->h_proto, skb->len);
 699
 700         udev = qedi->udev;
 701         uctrl = udev->uctrl;
 702
 703         work = kzalloc(sizeof(*work), GFP_ATOMIC);
 704         if (!work) {
 705                 QEDI_WARN(&qedi->dbg_ctx,
 706                           "Could not allocate work so dropping frame.\n");
 707                 kfree_skb(skb);
 708                 return 0;
 709         }
 710
 711         INIT_LIST_HEAD(&work->list);
 712         work->skb = skb;
 713
 714         if (skb_vlan_tag_present(skb))
 715                 work->vlan_id = skb_vlan_tag_get(skb);
 716
 717         if (work->vlan_id)
 718                 __vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
 719
 720         spin_lock_bh(&qedi->ll2_lock);
 721         list_add_tail(&work->list, &qedi->ll2_skb_list);
 722         spin_unlock_bh(&qedi->ll2_lock);
 723
 724         wake_up_process(qedi->ll2_recv_thread);
 725
 726         return 0;
 727 }
 728
 729 /* map this skb to iscsiuio mmaped region */
 730 static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
 731                                 u16 vlan_id)
 732 {
 733         struct qedi_uio_dev *udev = NULL;
 734         struct qedi_uio_ctrl *uctrl = NULL;
 735         struct qedi_rx_bd rxbd;
 736         struct qedi_rx_bd *p_rxbd;
 737         u32 rx_bd_prod;
 738         void *pkt;
 739         int len = 0;
 740         u32 prod;
 741
 742         if (!qedi) {
 743                 QEDI_ERR(NULL, "qedi is NULL\n");
 744                 return -1;
 745         }
 746
 747         udev = qedi->udev;
 748         uctrl = udev->uctrl;
 749
 750         ++uctrl->hw_rx_prod_cnt;
 751         prod = (uctrl->hw_rx_prod + 1) % RX_RING;
 752
 753         pkt = udev->rx_pkt + (prod * qedi_ll2_buf_size);
 754         len = min_t(u32, skb->len, (u32)qedi_ll2_buf_size);
 755         memcpy(pkt, skb->data, len);
 756
 757         memset(&rxbd, 0, sizeof(rxbd));
 758         rxbd.rx_pkt_index = prod;
 759         rxbd.rx_pkt_len = len;
 760         rxbd.vlan_id = vlan_id;
 761
 762         uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
 763         rx_bd_prod = uctrl->hw_rx_bd_prod;
 764         p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
 765         p_rxbd += rx_bd_prod;
 766
 767         memcpy(p_rxbd, &rxbd, sizeof(rxbd));
 768
 769         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
 770                   "hw_rx_prod [%d] prod [%d] hw_rx_bd_prod [%d] rx_pkt_idx [%d] rx_len [%d].\n",
 771                   uctrl->hw_rx_prod, prod, uctrl->hw_rx_bd_prod,
 772                   rxbd.rx_pkt_index, rxbd.rx_pkt_len);
 773         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
 774                   "host_rx_cons [%d] hw_rx_bd_cons [%d].\n",
 775                   uctrl->host_rx_cons, uctrl->host_rx_bd_cons);
 776
 777         uctrl->hw_rx_prod = prod;
 778
 779         /* notify the iscsiuio about new packet */
 780         uio_event_notify(&udev->qedi_uinfo);
 781
 782         return 0;
 783 }
 784
 785 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
 786 {
 787         struct skb_work_list *work, *work_tmp;
 788
 789         spin_lock_bh(&qedi->ll2_lock);
 790         list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
 791                 list_del(&work->list);
 792                 if (work->skb)
 793                         kfree_skb(work->skb);
 794                 kfree(work);
 795         }
 796         spin_unlock_bh(&qedi->ll2_lock);
 797 }
 798
 799 static int qedi_ll2_recv_thread(void *arg)
 800 {
 801         struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
 802         struct skb_work_list *work, *work_tmp;
 803
 804         set_user_nice(current, -20);
 805
 806         while (!kthread_should_stop()) {
 807                 spin_lock_bh(&qedi->ll2_lock);
 808                 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
 809                                          list) {
 810                         list_del(&work->list);
 811                         qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
 812                         kfree_skb(work->skb);
 813                         kfree(work);
 814                 }
 815                 set_current_state(TASK_INTERRUPTIBLE);
 816                 spin_unlock_bh(&qedi->ll2_lock);
 817                 schedule();
 818         }
 819
 820         __set_current_state(TASK_RUNNING);
 821         return 0;
 822 }
 823
 824 static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
 825 {
 826         u8 num_sq_pages;
 827         u32 log_page_size;
 828         int rval = 0;
 829
 830
 831         num_sq_pages = (MAX_OUTSTANDING_TASKS_PER_CON * 8) / QEDI_PAGE_SIZE;
 832
 833         qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
 834
 835         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 836                   "Number of CQ count is %d\n", qedi->num_queues);
 837
 838         memset(&qedi->pf_params.iscsi_pf_params, 0,
 839                sizeof(qedi->pf_params.iscsi_pf_params));
 840
 841         qedi->p_cpuq = dma_alloc_coherent(&qedi->pdev->dev,
 842                         qedi->num_queues * sizeof(struct qedi_glbl_q_params),
 843                         &qedi->hw_p_cpuq, GFP_KERNEL);
 844         if (!qedi->p_cpuq) {
 845                 QEDI_ERR(&qedi->dbg_ctx, "dma_alloc_coherent fail\n");
 846                 rval = -1;
 847                 goto err_alloc_mem;
 848         }
 849
 850         rval = qedi_alloc_global_queues(qedi);
 851         if (rval) {
 852                 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
 853                 rval = -1;
 854                 goto err_alloc_mem;
 855         }
 856
 857         qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
 858         qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
 859         qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
 860         qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
 861         qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
 862         qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
 863         qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
 864         qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
 865         qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000;
 866         qedi->pf_params.iscsi_pf_params.max_fin_rt = 2;
 867
 868         for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
 869                 if ((1 << log_page_size) == QEDI_PAGE_SIZE)
 870                         break;
 871         }
 872         qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
 873
 874         qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
 875                                                            (u64)qedi->hw_p_cpuq;
 876
 877         /* RQ BDQ initializations.
 878          * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
 879          * rqe_log_size: 8 for 256B RQE
 880          */
 881         qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
 882         /* BDQ address and size */
 883         qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
 884                                                         qedi->bdq_pbl_list_dma;
 885         qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
 886                                                 qedi->bdq_pbl_list_num_entries;
 887         qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
 888
 889         /* cq_num_entries: num_tasks + rq_num_entries */
 890         qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
 891
 892         qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
 893         qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
 894
 895 err_alloc_mem:
 896         return rval;
 897 }
 898
 899 /* Free DMA coherent memory for array of queue pointers we pass to qed */
 900 static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
 901 {
 902         size_t size = 0;
 903
 904         if (qedi->p_cpuq) {
 905                 size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
 906                 dma_free_coherent(&qedi->pdev->dev, size, qedi->p_cpuq,
 907                                     qedi->hw_p_cpuq);
 908         }
 909
 910         qedi_free_global_queues(qedi);
 911
 912         kfree(qedi->global_queues);
 913 }
 914
 915 static void qedi_get_boot_tgt_info(struct nvm_iscsi_block *block,
 916                                    struct qedi_boot_target *tgt, u8 index)
 917 {
 918         u32 ipv6_en;
 919
 920         ipv6_en = !!(block->generic.ctrl_flags &
 921                      NVM_ISCSI_CFG_GEN_IPV6_ENABLED);
 922
 923         snprintf(tgt->iscsi_name, sizeof(tgt->iscsi_name), "%s\n",
 924                  block->target[index].target_name.byte);
 925
 926         tgt->ipv6_en = ipv6_en;
 927
 928         if (ipv6_en)
 929                 snprintf(tgt->ip_addr, IPV6_LEN, "%pI6\n",
 930                          block->target[index].ipv6_addr.byte);
 931         else
 932                 snprintf(tgt->ip_addr, IPV4_LEN, "%pI4\n",
 933                          block->target[index].ipv4_addr.byte);
 934 }
 935
 936 static int qedi_find_boot_info(struct qedi_ctx *qedi,
 937                                struct qed_mfw_tlv_iscsi *iscsi,
 938                                struct nvm_iscsi_block *block)
 939 {
 940         struct qedi_boot_target *pri_tgt = NULL, *sec_tgt = NULL;
 941         u32 pri_ctrl_flags = 0, sec_ctrl_flags = 0, found = 0;
 942         struct iscsi_cls_session *cls_sess;
 943         struct iscsi_cls_conn *cls_conn;
 944         struct qedi_conn *qedi_conn;
 945         struct iscsi_session *sess;
 946         struct iscsi_conn *conn;
 947         char ep_ip_addr[64];
 948         int i, ret = 0;
 949
 950         pri_ctrl_flags = !!(block->target[0].ctrl_flags &
 951                                         NVM_ISCSI_CFG_TARGET_ENABLED);
 952         if (pri_ctrl_flags) {
 953                 pri_tgt = kzalloc(sizeof(*pri_tgt), GFP_KERNEL);
 954                 if (!pri_tgt)
 955                         return -1;
 956                 qedi_get_boot_tgt_info(block, pri_tgt, 0);
 957         }
 958
 959         sec_ctrl_flags = !!(block->target[1].ctrl_flags &
 960                                         NVM_ISCSI_CFG_TARGET_ENABLED);
 961         if (sec_ctrl_flags) {
 962                 sec_tgt = kzalloc(sizeof(*sec_tgt), GFP_KERNEL);
 963                 if (!sec_tgt) {
 964                         ret = -1;
 965                         goto free_tgt;
 966                 }
 967                 qedi_get_boot_tgt_info(block, sec_tgt, 1);
 968         }
 969
 970         for (i = 0; i < qedi->max_active_conns; i++) {
 971                 qedi_conn = qedi_get_conn_from_id(qedi, i);
 972                 if (!qedi_conn)
 973                         continue;
 974
 975                 if (qedi_conn->ep->ip_type == TCP_IPV4)
 976                         snprintf(ep_ip_addr, IPV4_LEN, "%pI4\n",
 977                                  qedi_conn->ep->dst_addr);
 978                 else
 979                         snprintf(ep_ip_addr, IPV6_LEN, "%pI6\n",
 980                                  qedi_conn->ep->dst_addr);
 981
 982                 cls_conn = qedi_conn->cls_conn;
 983                 conn = cls_conn->dd_data;
 984                 cls_sess = iscsi_conn_to_session(cls_conn);
 985                 sess = cls_sess->dd_data;
 986
 987                 if (!iscsi_is_session_online(cls_sess))
 988                         continue;
 989
 990                 if (!sess->targetname)
 991                         continue;
 992
 993                 if (pri_ctrl_flags) {
 994                         if (!strcmp(pri_tgt->iscsi_name, sess->targetname) &&
 995                             !strcmp(pri_tgt->ip_addr, ep_ip_addr)) {
 996                                 found = 1;
 997                                 break;
 998                         }
 999                 }
1000
1001                 if (sec_ctrl_flags) {
1002                         if (!strcmp(sec_tgt->iscsi_name, sess->targetname) &&
1003                             !strcmp(sec_tgt->ip_addr, ep_ip_addr)) {
1004                                 found = 1;
1005                                 break;
1006                         }
1007                 }
1008         }
1009
1010         if (found) {
1011                 if (conn->hdrdgst_en) {
1012                         iscsi->header_digest_set = true;
1013                         iscsi->header_digest = 1;
1014                 }
1015
1016                 if (conn->datadgst_en) {
1017                         iscsi->data_digest_set = true;
1018                         iscsi->data_digest = 1;
1019                 }
1020                 iscsi->boot_taget_portal_set = true;
1021                 iscsi->boot_taget_portal = sess->tpgt;
1022
1023         } else {
1024                 ret = -1;
1025         }
1026
1027         if (sec_ctrl_flags)
1028                 kfree(sec_tgt);
1029 free_tgt:
1030         if (pri_ctrl_flags)
1031                 kfree(pri_tgt);
1032
1033         return ret;
1034 }
1035
1036 static void qedi_get_generic_tlv_data(void *dev, struct qed_generic_tlvs *data)
1037 {
1038         struct qedi_ctx *qedi;
1039
1040         if (!dev) {
1041                 QEDI_INFO(NULL, QEDI_LOG_EVT,
1042                           "dev is NULL so ignoring get_generic_tlv_data request.\n");
1043                 return;
1044         }
1045         qedi = (struct qedi_ctx *)dev;
1046
1047         memset(data, 0, sizeof(struct qed_generic_tlvs));
1048         ether_addr_copy(data->mac[0], qedi->mac);
1049 }
1050
1051 /*
1052  * Protocol TLV handler
1053  */
1054 static void qedi_get_protocol_tlv_data(void *dev, void *data)
1055 {
1056         struct qed_mfw_tlv_iscsi *iscsi = data;
1057         struct qed_iscsi_stats *fw_iscsi_stats;
1058         struct nvm_iscsi_block *block = NULL;
1059         u32 chap_en = 0, mchap_en = 0;
1060         struct qedi_ctx *qedi = dev;
1061         int rval = 0;
1062
1063         fw_iscsi_stats = kmalloc(sizeof(*fw_iscsi_stats), GFP_KERNEL);
1064         if (!fw_iscsi_stats) {
1065                 QEDI_ERR(&qedi->dbg_ctx,
1066                          "Could not allocate memory for fw_iscsi_stats.\n");
1067                 goto exit_get_data;
1068         }
1069
1070         mutex_lock(&qedi->stats_lock);
1071         /* Query firmware for offload stats */
1072         qedi_ops->get_stats(qedi->cdev, fw_iscsi_stats);
1073         mutex_unlock(&qedi->stats_lock);
1074
1075         iscsi->rx_frames_set = true;
1076         iscsi->rx_frames = fw_iscsi_stats->iscsi_rx_packet_cnt;
1077         iscsi->rx_bytes_set = true;
1078         iscsi->rx_bytes = fw_iscsi_stats->iscsi_rx_bytes_cnt;
1079         iscsi->tx_frames_set = true;
1080         iscsi->tx_frames = fw_iscsi_stats->iscsi_tx_packet_cnt;
1081         iscsi->tx_bytes_set = true;
1082         iscsi->tx_bytes = fw_iscsi_stats->iscsi_tx_bytes_cnt;
1083         iscsi->frame_size_set = true;
1084         iscsi->frame_size = qedi->ll2_mtu;
1085         block = qedi_get_nvram_block(qedi);
1086         if (block) {
1087                 chap_en = !!(block->generic.ctrl_flags &
1088                              NVM_ISCSI_CFG_GEN_CHAP_ENABLED);
1089                 mchap_en = !!(block->generic.ctrl_flags &
1090                               NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED);
1091
1092                 iscsi->auth_method_set = (chap_en || mchap_en) ? true : false;
1093                 iscsi->auth_method = 1;
1094                 if (chap_en)
1095                         iscsi->auth_method = 2;
1096                 if (mchap_en)
1097                         iscsi->auth_method = 3;
1098
1099                 iscsi->tx_desc_size_set = true;
1100                 iscsi->tx_desc_size = QEDI_SQ_SIZE;
1101                 iscsi->rx_desc_size_set = true;
1102                 iscsi->rx_desc_size = QEDI_CQ_SIZE;
1103
1104                 /* tpgt, hdr digest, data digest */
1105                 rval = qedi_find_boot_info(qedi, iscsi, block);
1106                 if (rval)
1107                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1108                                   "Boot target not set");
1109         }
1110
1111         kfree(fw_iscsi_stats);
1112 exit_get_data:
1113         return;
1114 }
1115
1116 static void qedi_link_update(void *dev, struct qed_link_output *link)
1117 {
1118         struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
1119
1120         if (link->link_up) {
1121                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
1122                 atomic_set(&qedi->link_state, QEDI_LINK_UP);
1123         } else {
1124                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1125                           "Link Down event.\n");
1126                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1127         }
1128 }
1129
1130 static struct qed_iscsi_cb_ops qedi_cb_ops = {
1131         {
1132                 .link_update =          qedi_link_update,
1133                 .get_protocol_tlv_data = qedi_get_protocol_tlv_data,
1134                 .get_generic_tlv_data = qedi_get_generic_tlv_data,
1135         }
1136 };
1137
1138 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
1139                           u16 que_idx, struct qedi_percpu_s *p)
1140 {
1141         struct qedi_work *qedi_work;
1142         struct qedi_conn *q_conn;
1143         struct iscsi_conn *conn;
1144         struct qedi_cmd *qedi_cmd;
1145         u32 iscsi_cid;
1146         int rc = 0;
1147
1148         iscsi_cid  = cqe->cqe_common.conn_id;
1149         q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
1150         if (!q_conn) {
1151                 QEDI_WARN(&qedi->dbg_ctx,
1152                           "Session no longer exists for cid=0x%x!!\n",
1153                           iscsi_cid);
1154                 return -1;
1155         }
1156         conn = q_conn->cls_conn->dd_data;
1157
1158         switch (cqe->cqe_common.cqe_type) {
1159         case ISCSI_CQE_TYPE_SOLICITED:
1160         case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
1161                 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
1162                 if (!qedi_cmd) {
1163                         rc = -1;
1164                         break;
1165                 }
1166                 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
1167                 qedi_cmd->cqe_work.qedi = qedi;
1168                 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
1169                 qedi_cmd->cqe_work.que_idx = que_idx;
1170                 qedi_cmd->cqe_work.is_solicited = true;
1171                 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
1172                 break;
1173         case ISCSI_CQE_TYPE_UNSOLICITED:
1174         case ISCSI_CQE_TYPE_DUMMY:
1175         case ISCSI_CQE_TYPE_TASK_CLEANUP:
1176                 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
1177                 if (!qedi_work) {
1178                         rc = -1;
1179                         break;
1180                 }
1181                 INIT_LIST_HEAD(&qedi_work->list);
1182                 qedi_work->qedi = qedi;
1183                 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
1184                 qedi_work->que_idx = que_idx;
1185                 qedi_work->is_solicited = false;
1186                 list_add_tail(&qedi_work->list, &p->work_list);
1187                 break;
1188         default:
1189                 rc = -1;
1190                 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
1191         }
1192         return rc;
1193 }
1194
1195 static bool qedi_process_completions(struct qedi_fastpath *fp)
1196 {
1197         struct qedi_ctx *qedi = fp->qedi;
1198         struct qed_sb_info *sb_info = fp->sb_info;
1199         struct status_block_e4 *sb = sb_info->sb_virt;
1200         struct qedi_percpu_s *p = NULL;
1201         struct global_queue *que;
1202         u16 prod_idx;
1203         unsigned long flags;
1204         union iscsi_cqe *cqe;
1205         int cpu;
1206         int ret;
1207
1208         /* Get the current firmware producer index */
1209         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1210
1211         if (prod_idx >= QEDI_CQ_SIZE)
1212                 prod_idx = prod_idx % QEDI_CQ_SIZE;
1213
1214         que = qedi->global_queues[fp->sb_id];
1215         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1216                   "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
1217                   que, prod_idx, que->cq_cons_idx, fp->sb_id);
1218
1219         qedi->intr_cpu = fp->sb_id;
1220         cpu = smp_processor_id();
1221         p = &per_cpu(qedi_percpu, cpu);
1222
1223         if (unlikely(!p->iothread))
1224                 WARN_ON(1);
1225
1226         spin_lock_irqsave(&p->p_work_lock, flags);
1227         while (que->cq_cons_idx != prod_idx) {
1228                 cqe = &que->cq[que->cq_cons_idx];
1229
1230                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1231                           "cqe=%p prod_idx=%d cons_idx=%d.\n",
1232                           cqe, prod_idx, que->cq_cons_idx);
1233
1234                 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
1235                 if (ret)
1236                         QEDI_WARN(&qedi->dbg_ctx,
1237                                   "Dropping CQE 0x%x for cid=0x%x.\n",
1238                                   que->cq_cons_idx, cqe->cqe_common.conn_id);
1239
1240                 que->cq_cons_idx++;
1241                 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1242                         que->cq_cons_idx = 0;
1243         }
1244         wake_up_process(p->iothread);
1245         spin_unlock_irqrestore(&p->p_work_lock, flags);
1246
1247         return true;
1248 }
1249
1250 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1251 {
1252         struct qedi_ctx *qedi = fp->qedi;
1253         struct global_queue *que;
1254         struct qed_sb_info *sb_info = fp->sb_info;
1255         struct status_block_e4 *sb = sb_info->sb_virt;
1256         u16 prod_idx;
1257
1258         barrier();
1259
1260         /* Get the current firmware producer index */
1261         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1262
1263         /* Get the pointer to the global CQ this completion is on */
1264         que = qedi->global_queues[fp->sb_id];
1265
1266         /* prod idx wrap around uint16 */
1267         if (prod_idx >= QEDI_CQ_SIZE)
1268                 prod_idx = prod_idx % QEDI_CQ_SIZE;
1269
1270         return (que->cq_cons_idx != prod_idx);
1271 }
1272
1273 /* MSI-X fastpath handler code */
1274 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1275 {
1276         struct qedi_fastpath *fp = dev_id;
1277         struct qedi_ctx *qedi = fp->qedi;
1278         bool wake_io_thread = true;
1279
1280         qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1281
1282 process_again:
1283         wake_io_thread = qedi_process_completions(fp);
1284         if (wake_io_thread) {
1285                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1286                           "process already running\n");
1287         }
1288
1289         if (qedi_fp_has_work(fp) == 0)
1290                 qed_sb_update_sb_idx(fp->sb_info);
1291
1292         /* Check for more work */
1293         rmb();
1294
1295         if (qedi_fp_has_work(fp) == 0)
1296                 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1297         else
1298                 goto process_again;
1299
1300         return IRQ_HANDLED;
1301 }
1302
1303 /* simd handler for MSI/INTa */
1304 static void qedi_simd_int_handler(void *cookie)
1305 {
1306         /* Cookie is qedi_ctx struct */
1307         struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1308
1309         QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1310 }
1311
1312 #define QEDI_SIMD_HANDLER_NUM           0
1313 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1314 {
1315         int i;
1316         u16 idx;
1317
1318         if (qedi->int_info.msix_cnt) {
1319                 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1320                         idx = i * qedi->dev_info.common.num_hwfns +
1321                         qedi_ops->common->get_affin_hwfn_idx(qedi->cdev);
1322
1323                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1324                                   "Freeing IRQ #%d vector_idx=%d.\n", i, idx);
1325
1326                         synchronize_irq(qedi->int_info.msix[idx].vector);
1327                         irq_set_affinity_hint(qedi->int_info.msix[idx].vector,
1328                                               NULL);
1329                         free_irq(qedi->int_info.msix[idx].vector,
1330                                  &qedi->fp_array[i]);
1331                 }
1332         } else {
1333                 qedi_ops->common->simd_handler_clean(qedi->cdev,
1334                                                      QEDI_SIMD_HANDLER_NUM);
1335         }
1336
1337         qedi->int_info.used_cnt = 0;
1338         qedi_ops->common->set_fp_int(qedi->cdev, 0);
1339 }
1340
1341 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1342 {
1343         int i, rc, cpu;
1344         u16 idx;
1345
1346         cpu = cpumask_first(cpu_online_mask);
1347         for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
1348                 idx = i * qedi->dev_info.common.num_hwfns +
1349                           qedi_ops->common->get_affin_hwfn_idx(qedi->cdev);
1350
1351                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1352                           "dev_info: num_hwfns=%d affin_hwfn_idx=%d.\n",
1353                           qedi->dev_info.common.num_hwfns,
1354                           qedi_ops->common->get_affin_hwfn_idx(qedi->cdev));
1355
1356                 rc = request_irq(qedi->int_info.msix[idx].vector,
1357                                  qedi_msix_handler, 0, "qedi",
1358                                  &qedi->fp_array[i]);
1359                 if (rc) {
1360                         QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1361                         qedi_sync_free_irqs(qedi);
1362                         return rc;
1363                 }
1364                 qedi->int_info.used_cnt++;
1365                 rc = irq_set_affinity_hint(qedi->int_info.msix[idx].vector,
1366                                            get_cpu_mask(cpu));
1367                 cpu = cpumask_next(cpu, cpu_online_mask);
1368         }
1369
1370         return 0;
1371 }
1372
1373 static int qedi_setup_int(struct qedi_ctx *qedi)
1374 {
1375         int rc = 0;
1376
1377         rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1378         rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1379         if (rc)
1380                 goto exit_setup_int;
1381
1382         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1383                   "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1384                    qedi->int_info.msix_cnt, num_online_cpus());
1385
1386         if (qedi->int_info.msix_cnt) {
1387                 rc = qedi_request_msix_irq(qedi);
1388                 goto exit_setup_int;
1389         } else {
1390                 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1391                                                       QEDI_SIMD_HANDLER_NUM,
1392                                                       qedi_simd_int_handler);
1393                 qedi->int_info.used_cnt = 1;
1394         }
1395
1396 exit_setup_int:
1397         return rc;
1398 }
1399
1400 static void qedi_free_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1401 {
1402         if (qedi->iscsi_image)
1403                 dma_free_coherent(&qedi->pdev->dev,
1404                                   sizeof(struct qedi_nvm_iscsi_image),
1405                                   qedi->iscsi_image, qedi->nvm_buf_dma);
1406 }
1407
1408 static int qedi_alloc_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1409 {
1410         qedi->iscsi_image = dma_alloc_coherent(&qedi->pdev->dev,
1411                                                sizeof(struct qedi_nvm_iscsi_image),
1412                                                &qedi->nvm_buf_dma, GFP_KERNEL);
1413         if (!qedi->iscsi_image) {
1414                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate NVM BUF.\n");
1415                 return -ENOMEM;
1416         }
1417         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1418                   "NVM BUF addr=0x%p dma=0x%llx.\n", qedi->iscsi_image,
1419                   qedi->nvm_buf_dma);
1420
1421         return 0;
1422 }
1423
1424 static void qedi_free_bdq(struct qedi_ctx *qedi)
1425 {
1426         int i;
1427
1428         if (qedi->bdq_pbl_list)
1429                 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
1430                                   qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1431
1432         if (qedi->bdq_pbl)
1433                 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1434                                   qedi->bdq_pbl, qedi->bdq_pbl_dma);
1435
1436         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1437                 if (qedi->bdq[i].buf_addr) {
1438                         dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1439                                           qedi->bdq[i].buf_addr,
1440                                           qedi->bdq[i].buf_dma);
1441                 }
1442         }
1443 }
1444
1445 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1446 {
1447         int i;
1448         struct global_queue **gl = qedi->global_queues;
1449
1450         for (i = 0; i < qedi->num_queues; i++) {
1451                 if (!gl[i])
1452                         continue;
1453
1454                 if (gl[i]->cq)
1455                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1456                                           gl[i]->cq, gl[i]->cq_dma);
1457                 if (gl[i]->cq_pbl)
1458                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1459                                           gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1460
1461                 kfree(gl[i]);
1462         }
1463         qedi_free_bdq(qedi);
1464         qedi_free_nvm_iscsi_cfg(qedi);
1465 }
1466
1467 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1468 {
1469         int i;
1470         struct scsi_bd *pbl;
1471         u64 *list;
1472         dma_addr_t page;
1473
1474         /* Alloc dma memory for BDQ buffers */
1475         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1476                 qedi->bdq[i].buf_addr =
1477                                 dma_alloc_coherent(&qedi->pdev->dev,
1478                                                    QEDI_BDQ_BUF_SIZE,
1479                                                    &qedi->bdq[i].buf_dma,
1480                                                    GFP_KERNEL);
1481                 if (!qedi->bdq[i].buf_addr) {
1482                         QEDI_ERR(&qedi->dbg_ctx,
1483                                  "Could not allocate BDQ buffer %d.\n", i);
1484                         return -ENOMEM;
1485                 }
1486         }
1487
1488         /* Alloc dma memory for BDQ page buffer list */
1489         qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1490         qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, QEDI_PAGE_SIZE);
1491         qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1492
1493         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1494                   qedi->rq_num_entries);
1495
1496         qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1497                                            qedi->bdq_pbl_mem_size,
1498                                            &qedi->bdq_pbl_dma, GFP_KERNEL);
1499         if (!qedi->bdq_pbl) {
1500                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1501                 return -ENOMEM;
1502         }
1503
1504         /*
1505          * Populate BDQ PBL with physical and virtual address of individual
1506          * BDQ buffers
1507          */
1508         pbl = (struct scsi_bd  *)qedi->bdq_pbl;
1509         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1510                 pbl->address.hi =
1511                                 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1512                 pbl->address.lo =
1513                                 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1514                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1515                           "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1516                           pbl, pbl->address.hi, pbl->address.lo, i);
1517                 pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
1518                 pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
1519                 pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
1520                 pbl->opaque.iscsi_opaque.opaque = cpu_to_le16(i);
1521                 pbl++;
1522         }
1523
1524         /* Allocate list of PBL pages */
1525         qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev,
1526                                                 QEDI_PAGE_SIZE,
1527                                                 &qedi->bdq_pbl_list_dma,
1528                                                 GFP_KERNEL);
1529         if (!qedi->bdq_pbl_list) {
1530                 QEDI_ERR(&qedi->dbg_ctx,
1531                          "Could not allocate list of PBL pages.\n");
1532                 return -ENOMEM;
1533         }
1534
1535         /*
1536          * Now populate PBL list with pages that contain pointers to the
1537          * individual buffers.
1538          */
1539         qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size /
1540                                          QEDI_PAGE_SIZE;
1541         list = (u64 *)qedi->bdq_pbl_list;
1542         page = qedi->bdq_pbl_list_dma;
1543         for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1544                 *list = qedi->bdq_pbl_dma;
1545                 list++;
1546                 page += QEDI_PAGE_SIZE;
1547         }
1548
1549         return 0;
1550 }
1551
1552 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1553 {
1554         u32 *list;
1555         int i;
1556         int status = 0, rc;
1557         u32 *pbl;
1558         dma_addr_t page;
1559         int num_pages;
1560
1561         /*
1562          * Number of global queues (CQ / RQ). This should
1563          * be <= number of available MSIX vectors for the PF
1564          */
1565         if (!qedi->num_queues) {
1566                 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1567                 return 1;
1568         }
1569
1570         /* Make sure we allocated the PBL that will contain the physical
1571          * addresses of our queues
1572          */
1573         if (!qedi->p_cpuq) {
1574                 status = 1;
1575                 goto mem_alloc_failure;
1576         }
1577
1578         qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1579                                        qedi->num_queues), GFP_KERNEL);
1580         if (!qedi->global_queues) {
1581                 QEDI_ERR(&qedi->dbg_ctx,
1582                          "Unable to allocate global queues array ptr memory\n");
1583                 return -ENOMEM;
1584         }
1585         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1586                   "qedi->global_queues=%p.\n", qedi->global_queues);
1587
1588         /* Allocate DMA coherent buffers for BDQ */
1589         rc = qedi_alloc_bdq(qedi);
1590         if (rc)
1591                 goto mem_alloc_failure;
1592
1593         /* Allocate DMA coherent buffers for NVM_ISCSI_CFG */
1594         rc = qedi_alloc_nvm_iscsi_cfg(qedi);
1595         if (rc)
1596                 goto mem_alloc_failure;
1597
1598         /* Allocate a CQ and an associated PBL for each MSI-X
1599          * vector.
1600          */
1601         for (i = 0; i < qedi->num_queues; i++) {
1602                 qedi->global_queues[i] =
1603                                         kzalloc(sizeof(*qedi->global_queues[0]),
1604                                                 GFP_KERNEL);
1605                 if (!qedi->global_queues[i]) {
1606                         QEDI_ERR(&qedi->dbg_ctx,
1607                                  "Unable to allocation global queue %d.\n", i);
1608                         goto mem_alloc_failure;
1609                 }
1610
1611                 qedi->global_queues[i]->cq_mem_size =
1612                     (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1613                 qedi->global_queues[i]->cq_mem_size =
1614                     (qedi->global_queues[i]->cq_mem_size +
1615                     (QEDI_PAGE_SIZE - 1));
1616
1617                 qedi->global_queues[i]->cq_pbl_size =
1618                     (qedi->global_queues[i]->cq_mem_size /
1619                     QEDI_PAGE_SIZE) * sizeof(void *);
1620                 qedi->global_queues[i]->cq_pbl_size =
1621                     (qedi->global_queues[i]->cq_pbl_size +
1622                     (QEDI_PAGE_SIZE - 1));
1623
1624                 qedi->global_queues[i]->cq = dma_alloc_coherent(&qedi->pdev->dev,
1625                                                                 qedi->global_queues[i]->cq_mem_size,
1626                                                                 &qedi->global_queues[i]->cq_dma,
1627                                                                 GFP_KERNEL);
1628
1629                 if (!qedi->global_queues[i]->cq) {
1630                         QEDI_WARN(&qedi->dbg_ctx,
1631                                   "Could not allocate cq.\n");
1632                         status = -ENOMEM;
1633                         goto mem_alloc_failure;
1634                 }
1635                 qedi->global_queues[i]->cq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1636                                                                     qedi->global_queues[i]->cq_pbl_size,
1637                                                                     &qedi->global_queues[i]->cq_pbl_dma,
1638                                                                     GFP_KERNEL);
1639
1640                 if (!qedi->global_queues[i]->cq_pbl) {
1641                         QEDI_WARN(&qedi->dbg_ctx,
1642                                   "Could not allocate cq PBL.\n");
1643                         status = -ENOMEM;
1644                         goto mem_alloc_failure;
1645                 }
1646
1647                 /* Create PBL */
1648                 num_pages = qedi->global_queues[i]->cq_mem_size /
1649                     QEDI_PAGE_SIZE;
1650                 page = qedi->global_queues[i]->cq_dma;
1651                 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1652
1653                 while (num_pages--) {
1654                         *pbl = (u32)page;
1655                         pbl++;
1656                         *pbl = (u32)((u64)page >> 32);
1657                         pbl++;
1658                         page += QEDI_PAGE_SIZE;
1659                 }
1660         }
1661
1662         list = (u32 *)qedi->p_cpuq;
1663
1664         /*
1665          * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1666          * CQ#1 PBL pointer, RQ#1 PBL pointer, etc.  Each PBL pointer points
1667          * to the physical address which contains an array of pointers to the
1668          * physical addresses of the specific queue pages.
1669          */
1670         for (i = 0; i < qedi->num_queues; i++) {
1671                 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1672                 list++;
1673                 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1674                 list++;
1675
1676                 *list = (u32)0;
1677                 list++;
1678                 *list = (u32)((u64)0 >> 32);
1679                 list++;
1680         }
1681
1682         return 0;
1683
1684 mem_alloc_failure:
1685         qedi_free_global_queues(qedi);
1686         return status;
1687 }
1688
1689 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1690 {
1691         int rval = 0;
1692         u32 *pbl;
1693         dma_addr_t page;
1694         int num_pages;
1695
1696         if (!ep)
1697                 return -EIO;
1698
1699         /* Calculate appropriate queue and PBL sizes */
1700         ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1701         ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1702
1703         ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1704         ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1705
1706         ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1707                                     &ep->sq_dma, GFP_KERNEL);
1708         if (!ep->sq) {
1709                 QEDI_WARN(&qedi->dbg_ctx,
1710                           "Could not allocate send queue.\n");
1711                 rval = -ENOMEM;
1712                 goto out;
1713         }
1714         ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1715                                         &ep->sq_pbl_dma, GFP_KERNEL);
1716         if (!ep->sq_pbl) {
1717                 QEDI_WARN(&qedi->dbg_ctx,
1718                           "Could not allocate send queue PBL.\n");
1719                 rval = -ENOMEM;
1720                 goto out_free_sq;
1721         }
1722
1723         /* Create PBL */
1724         num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1725         page = ep->sq_dma;
1726         pbl = (u32 *)ep->sq_pbl;
1727
1728         while (num_pages--) {
1729                 *pbl = (u32)page;
1730                 pbl++;
1731                 *pbl = (u32)((u64)page >> 32);
1732                 pbl++;
1733                 page += QEDI_PAGE_SIZE;
1734         }
1735
1736         return rval;
1737
1738 out_free_sq:
1739         dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1740                           ep->sq_dma);
1741 out:
1742         return rval;
1743 }
1744
1745 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1746 {
1747         if (ep->sq_pbl)
1748                 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1749                                   ep->sq_pbl_dma);
1750         if (ep->sq)
1751                 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1752                                   ep->sq_dma);
1753 }
1754
1755 int qedi_get_task_idx(struct qedi_ctx *qedi)
1756 {
1757         s16 tmp_idx;
1758
1759 again:
1760         tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1761                                       MAX_ISCSI_TASK_ENTRIES);
1762
1763         if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1764                 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1765                 tmp_idx = -1;
1766                 goto err_idx;
1767         }
1768
1769         if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1770                 goto again;
1771
1772 err_idx:
1773         return tmp_idx;
1774 }
1775
1776 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1777 {
1778         if (!test_and_clear_bit(idx, qedi->task_idx_map))
1779                 QEDI_ERR(&qedi->dbg_ctx,
1780                          "FW task context, already cleared, tid=0x%x\n", idx);
1781 }
1782
1783 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1784                          struct qedi_cmd *cmd)
1785 {
1786         qedi->itt_map[tid].itt = proto_itt;
1787         qedi->itt_map[tid].p_cmd = cmd;
1788
1789         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1790                   "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1791                   qedi->itt_map[tid].itt);
1792 }
1793
1794 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1795 {
1796         u16 i;
1797
1798         for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1799                 if (qedi->itt_map[i].itt == itt) {
1800                         *tid = i;
1801                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1802                                   "Ref itt=0x%x, found at tid=0x%x\n",
1803                                   itt, *tid);
1804                         return;
1805                 }
1806         }
1807
1808         WARN_ON(1);
1809 }
1810
1811 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1812 {
1813         *proto_itt = qedi->itt_map[tid].itt;
1814         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1815                   "Get itt map tid [0x%x with proto itt[0x%x]",
1816                   tid, *proto_itt);
1817 }
1818
1819 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1820 {
1821         struct qedi_cmd *cmd = NULL;
1822
1823         if (tid >= MAX_ISCSI_TASK_ENTRIES)
1824                 return NULL;
1825
1826         cmd = qedi->itt_map[tid].p_cmd;
1827         if (cmd->task_id != tid)
1828                 return NULL;
1829
1830         qedi->itt_map[tid].p_cmd = NULL;
1831
1832         return cmd;
1833 }
1834
1835 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1836 {
1837         qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1838                                 sizeof(struct qedi_itt_map), GFP_KERNEL);
1839         if (!qedi->itt_map) {
1840                 QEDI_ERR(&qedi->dbg_ctx,
1841                          "Unable to allocate itt map array memory\n");
1842                 return -ENOMEM;
1843         }
1844         return 0;
1845 }
1846
1847 static void qedi_free_itt(struct qedi_ctx *qedi)
1848 {
1849         kfree(qedi->itt_map);
1850 }
1851
1852 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1853         .rx_cb = qedi_ll2_rx,
1854         .tx_cb = NULL,
1855 };
1856
1857 static int qedi_percpu_io_thread(void *arg)
1858 {
1859         struct qedi_percpu_s *p = arg;
1860         struct qedi_work *work, *tmp;
1861         unsigned long flags;
1862         LIST_HEAD(work_list);
1863
1864         set_user_nice(current, -20);
1865
1866         while (!kthread_should_stop()) {
1867                 spin_lock_irqsave(&p->p_work_lock, flags);
1868                 while (!list_empty(&p->work_list)) {
1869                         list_splice_init(&p->work_list, &work_list);
1870                         spin_unlock_irqrestore(&p->p_work_lock, flags);
1871
1872                         list_for_each_entry_safe(work, tmp, &work_list, list) {
1873                                 list_del_init(&work->list);
1874                                 qedi_fp_process_cqes(work);
1875                                 if (!work->is_solicited)
1876                                         kfree(work);
1877                         }
1878                         cond_resched();
1879                         spin_lock_irqsave(&p->p_work_lock, flags);
1880                 }
1881                 set_current_state(TASK_INTERRUPTIBLE);
1882                 spin_unlock_irqrestore(&p->p_work_lock, flags);
1883                 schedule();
1884         }
1885         __set_current_state(TASK_RUNNING);
1886
1887         return 0;
1888 }
1889
1890 static int qedi_cpu_online(unsigned int cpu)
1891 {
1892         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1893         struct task_struct *thread;
1894
1895         thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1896                                         cpu_to_node(cpu),
1897                                         "qedi_thread/%d", cpu);
1898         if (IS_ERR(thread))
1899                 return PTR_ERR(thread);
1900
1901         kthread_bind(thread, cpu);
1902         p->iothread = thread;
1903         wake_up_process(thread);
1904         return 0;
1905 }
1906
1907 static int qedi_cpu_offline(unsigned int cpu)
1908 {
1909         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1910         struct qedi_work *work, *tmp;
1911         struct task_struct *thread;
1912
1913         spin_lock_bh(&p->p_work_lock);
1914         thread = p->iothread;
1915         p->iothread = NULL;
1916
1917         list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1918                 list_del_init(&work->list);
1919                 qedi_fp_process_cqes(work);
1920                 if (!work->is_solicited)
1921                         kfree(work);
1922         }
1923
1924         spin_unlock_bh(&p->p_work_lock);
1925         if (thread)
1926                 kthread_stop(thread);
1927         return 0;
1928 }
1929
1930 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1931 {
1932         struct qed_ll2_params params;
1933
1934         qedi_recover_all_conns(qedi);
1935
1936         qedi_ops->ll2->stop(qedi->cdev);
1937         qedi_ll2_free_skbs(qedi);
1938
1939         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1940                   qedi->ll2_mtu, mtu);
1941         memset(&params, 0, sizeof(params));
1942         qedi->ll2_mtu = mtu;
1943         params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1944         params.drop_ttl0_packets = 0;
1945         params.rx_vlan_stripping = 1;
1946         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1947         qedi_ops->ll2->start(qedi->cdev, &params);
1948 }
1949
1950 /**
1951  * qedi_get_nvram_block: - Scan through the iSCSI NVRAM block (while accounting
1952  * for gaps) for the matching absolute-pf-id of the QEDI device.
1953  */
1954 static struct nvm_iscsi_block *
1955 qedi_get_nvram_block(struct qedi_ctx *qedi)
1956 {
1957         int i;
1958         u8 pf;
1959         u32 flags;
1960         struct nvm_iscsi_block *block;
1961
1962         pf = qedi->dev_info.common.abs_pf_id;
1963         block = &qedi->iscsi_image->iscsi_cfg.block[0];
1964         for (i = 0; i < NUM_OF_ISCSI_PF_SUPPORTED; i++, block++) {
1965                 flags = ((block->id) & NVM_ISCSI_CFG_BLK_CTRL_FLAG_MASK) >>
1966                         NVM_ISCSI_CFG_BLK_CTRL_FLAG_OFFSET;
1967                 if (flags & (NVM_ISCSI_CFG_BLK_CTRL_FLAG_IS_NOT_EMPTY |
1968                                 NVM_ISCSI_CFG_BLK_CTRL_FLAG_PF_MAPPED) &&
1969                         (pf == (block->id & NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_MASK)
1970                                 >> NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_OFFSET))
1971                         return block;
1972         }
1973         return NULL;
1974 }
1975
1976 static ssize_t qedi_show_boot_eth_info(void *data, int type, char *buf)
1977 {
1978         struct qedi_ctx *qedi = data;
1979         struct nvm_iscsi_initiator *initiator;
1980         int rc = 1;
1981         u32 ipv6_en, dhcp_en, ip_len;
1982         struct nvm_iscsi_block *block;
1983         char *fmt, *ip, *sub, *gw;
1984
1985         block = qedi_get_nvram_block(qedi);
1986         if (!block)
1987                 return 0;
1988
1989         initiator = &block->initiator;
1990         ipv6_en = block->generic.ctrl_flags &
1991                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
1992         dhcp_en = block->generic.ctrl_flags &
1993                   NVM_ISCSI_CFG_GEN_DHCP_TCPIP_CONFIG_ENABLED;
1994         /* Static IP assignments. */
1995         fmt = ipv6_en ? "%pI6\n" : "%pI4\n";
1996         ip = ipv6_en ? initiator->ipv6.addr.byte : initiator->ipv4.addr.byte;
1997         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
1998         sub = ipv6_en ? initiator->ipv6.subnet_mask.byte :
1999               initiator->ipv4.subnet_mask.byte;
2000         gw = ipv6_en ? initiator->ipv6.gateway.byte :
2001              initiator->ipv4.gateway.byte;
2002         /* DHCP IP adjustments. */
2003         fmt = dhcp_en ? "%s\n" : fmt;
2004         if (dhcp_en) {
2005                 ip = ipv6_en ? "0::0" : "0.0.0.0";
2006                 sub = ip;
2007                 gw = ip;
2008                 ip_len = ipv6_en ? 5 : 8;
2009         }
2010
2011         switch (type) {
2012         case ISCSI_BOOT_ETH_IP_ADDR:
2013                 rc = snprintf(buf, ip_len, fmt, ip);
2014                 break;
2015         case ISCSI_BOOT_ETH_SUBNET_MASK:
2016                 rc = snprintf(buf, ip_len, fmt, sub);
2017                 break;
2018         case ISCSI_BOOT_ETH_GATEWAY:
2019                 rc = snprintf(buf, ip_len, fmt, gw);
2020                 break;
2021         case ISCSI_BOOT_ETH_FLAGS:
2022                 rc = snprintf(buf, 3, "%hhd\n",
2023                               SYSFS_FLAG_FW_SEL_BOOT);
2024                 break;
2025         case ISCSI_BOOT_ETH_INDEX:
2026                 rc = snprintf(buf, 3, "0\n");
2027                 break;
2028         case ISCSI_BOOT_ETH_MAC:
2029                 rc = sysfs_format_mac(buf, qedi->mac, ETH_ALEN);
2030                 break;
2031         case ISCSI_BOOT_ETH_VLAN:
2032                 rc = snprintf(buf, 12, "%d\n",
2033                               GET_FIELD2(initiator->generic_cont0,
2034                                          NVM_ISCSI_CFG_INITIATOR_VLAN));
2035                 break;
2036         case ISCSI_BOOT_ETH_ORIGIN:
2037                 if (dhcp_en)
2038                         rc = snprintf(buf, 3, "3\n");
2039                 break;
2040         default:
2041                 rc = 0;
2042                 break;
2043         }
2044
2045         return rc;
2046 }
2047
2048 static umode_t qedi_eth_get_attr_visibility(void *data, int type)
2049 {
2050         int rc = 1;
2051
2052         switch (type) {
2053         case ISCSI_BOOT_ETH_FLAGS:
2054         case ISCSI_BOOT_ETH_MAC:
2055         case ISCSI_BOOT_ETH_INDEX:
2056         case ISCSI_BOOT_ETH_IP_ADDR:
2057         case ISCSI_BOOT_ETH_SUBNET_MASK:
2058         case ISCSI_BOOT_ETH_GATEWAY:
2059         case ISCSI_BOOT_ETH_ORIGIN:
2060         case ISCSI_BOOT_ETH_VLAN:
2061                 rc = 0444;
2062                 break;
2063         default:
2064                 rc = 0;
2065                 break;
2066         }
2067         return rc;
2068 }
2069
2070 static ssize_t qedi_show_boot_ini_info(void *data, int type, char *buf)
2071 {
2072         struct qedi_ctx *qedi = data;
2073         struct nvm_iscsi_initiator *initiator;
2074         int rc;
2075         struct nvm_iscsi_block *block;
2076
2077         block = qedi_get_nvram_block(qedi);
2078         if (!block)
2079                 return 0;
2080
2081         initiator = &block->initiator;
2082
2083         switch (type) {
2084         case ISCSI_BOOT_INI_INITIATOR_NAME:
2085                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2086                              initiator->initiator_name.byte);
2087                 break;
2088         default:
2089                 rc = 0;
2090                 break;
2091         }
2092         return rc;
2093 }
2094
2095 static umode_t qedi_ini_get_attr_visibility(void *data, int type)
2096 {
2097         int rc;
2098
2099         switch (type) {
2100         case ISCSI_BOOT_INI_INITIATOR_NAME:
2101                 rc = 0444;
2102                 break;
2103         default:
2104                 rc = 0;
2105                 break;
2106         }
2107         return rc;
2108 }
2109
2110 static ssize_t
2111 qedi_show_boot_tgt_info(struct qedi_ctx *qedi, int type,
2112                         char *buf, enum qedi_nvm_tgts idx)
2113 {
2114         int rc = 1;
2115         u32 ctrl_flags, ipv6_en, chap_en, mchap_en, ip_len;
2116         struct nvm_iscsi_block *block;
2117         char *chap_name, *chap_secret;
2118         char *mchap_name, *mchap_secret;
2119
2120         block = qedi_get_nvram_block(qedi);
2121         if (!block)
2122                 goto exit_show_tgt_info;
2123
2124         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2125                   "Port:%d, tgt_idx:%d\n",
2126                   GET_FIELD2(block->id, NVM_ISCSI_CFG_BLK_MAPPED_PF_ID), idx);
2127
2128         ctrl_flags = block->target[idx].ctrl_flags &
2129                      NVM_ISCSI_CFG_TARGET_ENABLED;
2130
2131         if (!ctrl_flags) {
2132                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2133                           "Target disabled\n");
2134                 goto exit_show_tgt_info;
2135         }
2136
2137         ipv6_en = block->generic.ctrl_flags &
2138                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
2139         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
2140         chap_en = block->generic.ctrl_flags &
2141                   NVM_ISCSI_CFG_GEN_CHAP_ENABLED;
2142         chap_name = chap_en ? block->initiator.chap_name.byte : NULL;
2143         chap_secret = chap_en ? block->initiator.chap_password.byte : NULL;
2144
2145         mchap_en = block->generic.ctrl_flags &
2146                   NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED;
2147         mchap_name = mchap_en ? block->target[idx].chap_name.byte : NULL;
2148         mchap_secret = mchap_en ? block->target[idx].chap_password.byte : NULL;
2149
2150         switch (type) {
2151         case ISCSI_BOOT_TGT_NAME:
2152                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2153                              block->target[idx].target_name.byte);
2154                 break;
2155         case ISCSI_BOOT_TGT_IP_ADDR:
2156                 if (ipv6_en)
2157                         rc = snprintf(buf, ip_len, "%pI6\n",
2158                                       block->target[idx].ipv6_addr.byte);
2159                 else
2160                         rc = snprintf(buf, ip_len, "%pI4\n",
2161                                       block->target[idx].ipv4_addr.byte);
2162                 break;
2163         case ISCSI_BOOT_TGT_PORT:
2164                 rc = snprintf(buf, 12, "%d\n",
2165                               GET_FIELD2(block->target[idx].generic_cont0,
2166                                          NVM_ISCSI_CFG_TARGET_TCP_PORT));
2167                 break;
2168         case ISCSI_BOOT_TGT_LUN:
2169                 rc = snprintf(buf, 22, "%.*d\n",
2170                               block->target[idx].lun.value[1],
2171                               block->target[idx].lun.value[0]);
2172                 break;
2173         case ISCSI_BOOT_TGT_CHAP_NAME:
2174                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2175                              chap_name);
2176                 break;
2177         case ISCSI_BOOT_TGT_CHAP_SECRET:
2178                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2179                              chap_secret);
2180                 break;
2181         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2182                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2183                              mchap_name);
2184                 break;
2185         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2186                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2187                              mchap_secret);
2188                 break;
2189         case ISCSI_BOOT_TGT_FLAGS:
2190                 rc = snprintf(buf, 3, "%hhd\n", SYSFS_FLAG_FW_SEL_BOOT);
2191                 break;
2192         case ISCSI_BOOT_TGT_NIC_ASSOC:
2193                 rc = snprintf(buf, 3, "0\n");
2194                 break;
2195         default:
2196                 rc = 0;
2197                 break;
2198         }
2199
2200 exit_show_tgt_info:
2201         return rc;
2202 }
2203
2204 static ssize_t qedi_show_boot_tgt_pri_info(void *data, int type, char *buf)
2205 {
2206         struct qedi_ctx *qedi = data;
2207
2208         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_PRI);
2209 }
2210
2211 static ssize_t qedi_show_boot_tgt_sec_info(void *data, int type, char *buf)
2212 {
2213         struct qedi_ctx *qedi = data;
2214
2215         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_SEC);
2216 }
2217
2218 static umode_t qedi_tgt_get_attr_visibility(void *data, int type)
2219 {
2220         int rc;
2221
2222         switch (type) {
2223         case ISCSI_BOOT_TGT_NAME:
2224         case ISCSI_BOOT_TGT_IP_ADDR:
2225         case ISCSI_BOOT_TGT_PORT:
2226         case ISCSI_BOOT_TGT_LUN:
2227         case ISCSI_BOOT_TGT_CHAP_NAME:
2228         case ISCSI_BOOT_TGT_CHAP_SECRET:
2229         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2230         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2231         case ISCSI_BOOT_TGT_NIC_ASSOC:
2232         case ISCSI_BOOT_TGT_FLAGS:
2233                 rc = 0444;
2234                 break;
2235         default:
2236                 rc = 0;
2237                 break;
2238         }
2239         return rc;
2240 }
2241
2242 static void qedi_boot_release(void *data)
2243 {
2244         struct qedi_ctx *qedi = data;
2245
2246         scsi_host_put(qedi->shost);
2247 }
2248
2249 static int qedi_get_boot_info(struct qedi_ctx *qedi)
2250 {
2251         int ret = 1;
2252
2253         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2254                   "Get NVM iSCSI CFG image\n");
2255         ret = qedi_ops->common->nvm_get_image(qedi->cdev,
2256                                               QED_NVM_IMAGE_ISCSI_CFG,
2257                                               (char *)qedi->iscsi_image,
2258                                               sizeof(struct qedi_nvm_iscsi_image));
2259         if (ret)
2260                 QEDI_ERR(&qedi->dbg_ctx,
2261                          "Could not get NVM image. ret = %d\n", ret);
2262
2263         return ret;
2264 }
2265
2266 static int qedi_setup_boot_info(struct qedi_ctx *qedi)
2267 {
2268         struct iscsi_boot_kobj *boot_kobj;
2269
2270         if (qedi_get_boot_info(qedi))
2271                 return -EPERM;
2272
2273         qedi->boot_kset = iscsi_boot_create_host_kset(qedi->shost->host_no);
2274         if (!qedi->boot_kset)
2275                 goto kset_free;
2276
2277         if (!scsi_host_get(qedi->shost))
2278                 goto kset_free;
2279
2280         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 0, qedi,
2281                                              qedi_show_boot_tgt_pri_info,
2282                                              qedi_tgt_get_attr_visibility,
2283                                              qedi_boot_release);
2284         if (!boot_kobj)
2285                 goto put_host;
2286
2287         if (!scsi_host_get(qedi->shost))
2288                 goto kset_free;
2289
2290         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 1, qedi,
2291                                              qedi_show_boot_tgt_sec_info,
2292                                              qedi_tgt_get_attr_visibility,
2293                                              qedi_boot_release);
2294         if (!boot_kobj)
2295                 goto put_host;
2296
2297         if (!scsi_host_get(qedi->shost))
2298                 goto kset_free;
2299
2300         boot_kobj = iscsi_boot_create_initiator(qedi->boot_kset, 0, qedi,
2301                                                 qedi_show_boot_ini_info,
2302                                                 qedi_ini_get_attr_visibility,
2303                                                 qedi_boot_release);
2304         if (!boot_kobj)
2305                 goto put_host;
2306
2307         if (!scsi_host_get(qedi->shost))
2308                 goto kset_free;
2309
2310         boot_kobj = iscsi_boot_create_ethernet(qedi->boot_kset, 0, qedi,
2311                                                qedi_show_boot_eth_info,
2312                                                qedi_eth_get_attr_visibility,
2313                                                qedi_boot_release);
2314         if (!boot_kobj)
2315                 goto put_host;
2316
2317         return 0;
2318
2319 put_host:
2320         scsi_host_put(qedi->shost);
2321 kset_free:
2322         iscsi_boot_destroy_kset(qedi->boot_kset);
2323         return -ENOMEM;
2324 }
2325
2326 static void __qedi_remove(struct pci_dev *pdev, int mode)
2327 {
2328         struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2329         int rval;
2330
2331         if (qedi->tmf_thread) {
2332                 flush_workqueue(qedi->tmf_thread);
2333                 destroy_workqueue(qedi->tmf_thread);
2334                 qedi->tmf_thread = NULL;
2335         }
2336
2337         if (qedi->offload_thread) {
2338                 flush_workqueue(qedi->offload_thread);
2339                 destroy_workqueue(qedi->offload_thread);
2340                 qedi->offload_thread = NULL;
2341         }
2342
2343 #ifdef CONFIG_DEBUG_FS
2344         qedi_dbg_host_exit(&qedi->dbg_ctx);
2345 #endif
2346         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
2347                 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2348
2349         qedi_sync_free_irqs(qedi);
2350
2351         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2352                 qedi_ops->stop(qedi->cdev);
2353                 qedi_ops->ll2->stop(qedi->cdev);
2354         }
2355
2356         if (mode == QEDI_MODE_NORMAL)
2357                 qedi_free_iscsi_pf_param(qedi);
2358
2359         rval = qedi_ops->common->update_drv_state(qedi->cdev, false);
2360         if (rval)
2361                 QEDI_ERR(&qedi->dbg_ctx, "Failed to send drv state to MFW\n");
2362
2363         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2364                 qedi_ops->common->slowpath_stop(qedi->cdev);
2365                 qedi_ops->common->remove(qedi->cdev);
2366         }
2367
2368         qedi_destroy_fp(qedi);
2369
2370         if (mode == QEDI_MODE_NORMAL) {
2371                 qedi_release_cid_que(qedi);
2372                 qedi_cm_free_mem(qedi);
2373                 qedi_free_uio(qedi->udev);
2374                 qedi_free_itt(qedi);
2375
2376                 iscsi_host_remove(qedi->shost);
2377                 iscsi_host_free(qedi->shost);
2378
2379                 if (qedi->ll2_recv_thread) {
2380                         kthread_stop(qedi->ll2_recv_thread);
2381                         qedi->ll2_recv_thread = NULL;
2382                 }
2383                 qedi_ll2_free_skbs(qedi);
2384
2385                 if (qedi->boot_kset)
2386                         iscsi_boot_destroy_kset(qedi->boot_kset);
2387         }
2388 }
2389
2390 static int __qedi_probe(struct pci_dev *pdev, int mode)
2391 {
2392         struct qedi_ctx *qedi;
2393         struct qed_ll2_params params;
2394         u32 dp_module = 0;
2395         u8 dp_level = 0;
2396         bool is_vf = false;
2397         char host_buf[16];
2398         struct qed_link_params link_params;
2399         struct qed_slowpath_params sp_params;
2400         struct qed_probe_params qed_params;
2401         void *task_start, *task_end;
2402         int rc;
2403         u16 tmp;
2404
2405         if (mode != QEDI_MODE_RECOVERY) {
2406                 qedi = qedi_host_alloc(pdev);
2407                 if (!qedi) {
2408                         rc = -ENOMEM;
2409                         goto exit_probe;
2410                 }
2411         } else {
2412                 qedi = pci_get_drvdata(pdev);
2413         }
2414
2415         memset(&qed_params, 0, sizeof(qed_params));
2416         qed_params.protocol = QED_PROTOCOL_ISCSI;
2417         qed_params.dp_module = dp_module;
2418         qed_params.dp_level = dp_level;
2419         qed_params.is_vf = is_vf;
2420         qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
2421         if (!qedi->cdev) {
2422                 rc = -ENODEV;
2423                 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
2424                 goto free_host;
2425         }
2426
2427         atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2428
2429         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2430         if (rc)
2431                 goto free_host;
2432
2433         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2434                   "dev_info: num_hwfns=%d affin_hwfn_idx=%d.\n",
2435                   qedi->dev_info.common.num_hwfns,
2436                   qedi_ops->common->get_affin_hwfn_idx(qedi->cdev));
2437
2438         if (mode != QEDI_MODE_RECOVERY) {
2439                 rc = qedi_set_iscsi_pf_param(qedi);
2440                 if (rc) {
2441                         rc = -ENOMEM;
2442                         QEDI_ERR(&qedi->dbg_ctx,
2443                                  "Set iSCSI pf param fail\n");
2444                         goto free_host;
2445                 }
2446         }
2447
2448         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2449
2450         rc = qedi_prepare_fp(qedi);
2451         if (rc) {
2452                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
2453                 goto free_pf_params;
2454         }
2455
2456         /* Start the Slowpath-process */
2457         memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
2458         sp_params.int_mode = QED_INT_MODE_MSIX;
2459         sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
2460         sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
2461         sp_params.drv_rev = QEDI_DRIVER_REV_VER;
2462         sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
2463         strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
2464         rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
2465         if (rc) {
2466                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
2467                 goto stop_hw;
2468         }
2469
2470         /* update_pf_params needs to be called before and after slowpath
2471          * start
2472          */
2473         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2474
2475         rc = qedi_setup_int(qedi);
2476         if (rc)
2477                 goto stop_iscsi_func;
2478
2479         qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2480
2481         /* Learn information crucial for qedi to progress */
2482         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2483         if (rc)
2484                 goto stop_iscsi_func;
2485
2486         /* Record BDQ producer doorbell addresses */
2487         qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
2488         qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
2489         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2490                   "BDQ primary_prod=%p secondary_prod=%p.\n",
2491                   qedi->bdq_primary_prod,
2492                   qedi->bdq_secondary_prod);
2493
2494         /*
2495          * We need to write the number of BDs in the BDQ we've preallocated so
2496          * the f/w will do a prefetch and we'll get an unsolicited CQE when a
2497          * packet arrives.
2498          */
2499         qedi->bdq_prod_idx = QEDI_BDQ_NUM;
2500         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2501                   "Writing %d to primary and secondary BDQ doorbell registers.\n",
2502                   qedi->bdq_prod_idx);
2503         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
2504         tmp = readw(qedi->bdq_primary_prod);
2505         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
2506         tmp = readw(qedi->bdq_secondary_prod);
2507
2508         ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
2509         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
2510                   qedi->mac);
2511
2512         sprintf(host_buf, "host_%d", qedi->shost->host_no);
2513         qedi_ops->common->set_name(qedi->cdev, host_buf);
2514
2515         qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
2516
2517         memset(&params, 0, sizeof(params));
2518         params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
2519         qedi->ll2_mtu = DEF_PATH_MTU;
2520         params.drop_ttl0_packets = 0;
2521         params.rx_vlan_stripping = 1;
2522         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
2523
2524         if (mode != QEDI_MODE_RECOVERY) {
2525                 /* set up rx path */
2526                 INIT_LIST_HEAD(&qedi->ll2_skb_list);
2527                 spin_lock_init(&qedi->ll2_lock);
2528                 /* start qedi context */
2529                 spin_lock_init(&qedi->hba_lock);
2530                 spin_lock_init(&qedi->task_idx_lock);
2531                 mutex_init(&qedi->stats_lock);
2532         }
2533         qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
2534         qedi_ops->ll2->start(qedi->cdev, &params);
2535
2536         if (mode != QEDI_MODE_RECOVERY) {
2537                 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
2538                                                     (void *)qedi,
2539                                                     "qedi_ll2_thread");
2540         }
2541
2542         rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
2543                              qedi, qedi_iscsi_event_cb);
2544         if (rc) {
2545                 rc = -ENODEV;
2546                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
2547                 goto stop_slowpath;
2548         }
2549
2550         task_start = qedi_get_task_mem(&qedi->tasks, 0);
2551         task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
2552         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2553                   "Task context start=%p, end=%p block_size=%u.\n",
2554                    task_start, task_end, qedi->tasks.size);
2555
2556         memset(&link_params, 0, sizeof(link_params));
2557         link_params.link_up = true;
2558         rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
2559         if (rc) {
2560                 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
2561                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2562         }
2563
2564 #ifdef CONFIG_DEBUG_FS
2565         qedi_dbg_host_init(&qedi->dbg_ctx, qedi_debugfs_ops,
2566                            qedi_dbg_fops);
2567 #endif
2568         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2569                   "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
2570                   QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
2571                   FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
2572
2573         if (mode == QEDI_MODE_NORMAL) {
2574                 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
2575                         QEDI_ERR(&qedi->dbg_ctx,
2576                                  "Could not add iscsi host\n");
2577                         rc = -ENOMEM;
2578                         goto remove_host;
2579                 }
2580
2581                 /* Allocate uio buffers */
2582                 rc = qedi_alloc_uio_rings(qedi);
2583                 if (rc) {
2584                         QEDI_ERR(&qedi->dbg_ctx,
2585                                  "UIO alloc ring failed err=%d\n", rc);
2586                         goto remove_host;
2587                 }
2588
2589                 rc = qedi_init_uio(qedi);
2590                 if (rc) {
2591                         QEDI_ERR(&qedi->dbg_ctx,
2592                                  "UIO init failed, err=%d\n", rc);
2593                         goto free_uio;
2594                 }
2595
2596                 /* host the array on iscsi_conn */
2597                 rc = qedi_setup_cid_que(qedi);
2598                 if (rc) {
2599                         QEDI_ERR(&qedi->dbg_ctx,
2600                                  "Could not setup cid que\n");
2601                         goto free_uio;
2602                 }
2603
2604                 rc = qedi_cm_alloc_mem(qedi);
2605                 if (rc) {
2606                         QEDI_ERR(&qedi->dbg_ctx,
2607                                  "Could not alloc cm memory\n");
2608                         goto free_cid_que;
2609                 }
2610
2611                 rc = qedi_alloc_itt(qedi);
2612                 if (rc) {
2613                         QEDI_ERR(&qedi->dbg_ctx,
2614                                  "Could not alloc itt memory\n");
2615                         goto free_cid_que;
2616                 }
2617
2618                 sprintf(host_buf, "host_%d", qedi->shost->host_no);
2619                 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
2620                 if (!qedi->tmf_thread) {
2621                         QEDI_ERR(&qedi->dbg_ctx,
2622                                  "Unable to start tmf thread!\n");
2623                         rc = -ENODEV;
2624                         goto free_cid_que;
2625                 }
2626
2627                 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
2628                 qedi->offload_thread = create_workqueue(host_buf);
2629                 if (!qedi->offload_thread) {
2630                         QEDI_ERR(&qedi->dbg_ctx,
2631                                  "Unable to start offload thread!\n");
2632                         rc = -ENODEV;
2633                         goto free_cid_que;
2634                 }
2635
2636                 /* F/w needs 1st task context memory entry for performance */
2637                 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
2638                 atomic_set(&qedi->num_offloads, 0);
2639
2640                 if (qedi_setup_boot_info(qedi))
2641                         QEDI_ERR(&qedi->dbg_ctx,
2642                                  "No iSCSI boot target configured\n");
2643
2644                 rc = qedi_ops->common->update_drv_state(qedi->cdev, true);
2645                 if (rc)
2646                         QEDI_ERR(&qedi->dbg_ctx,
2647                                  "Failed to send drv state to MFW\n");
2648
2649         }
2650
2651         return 0;
2652
2653 free_cid_que:
2654         qedi_release_cid_que(qedi);
2655 free_uio:
2656         qedi_free_uio(qedi->udev);
2657 remove_host:
2658 #ifdef CONFIG_DEBUG_FS
2659         qedi_dbg_host_exit(&qedi->dbg_ctx);
2660 #endif
2661         iscsi_host_remove(qedi->shost);
2662 stop_iscsi_func:
2663         qedi_ops->stop(qedi->cdev);
2664 stop_slowpath:
2665         qedi_ops->common->slowpath_stop(qedi->cdev);
2666 stop_hw:
2667         qedi_ops->common->remove(qedi->cdev);
2668 free_pf_params:
2669         qedi_free_iscsi_pf_param(qedi);
2670 free_host:
2671         iscsi_host_free(qedi->shost);
2672 exit_probe:
2673         return rc;
2674 }
2675
2676 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2677 {
2678         return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2679 }
2680
2681 static void qedi_remove(struct pci_dev *pdev)
2682 {
2683         __qedi_remove(pdev, QEDI_MODE_NORMAL);
2684 }
2685
2686 static struct pci_device_id qedi_pci_tbl[] = {
2687         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2688         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
2689         { 0 },
2690 };
2691 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2692
2693 static enum cpuhp_state qedi_cpuhp_state;
2694
2695 static struct pci_driver qedi_pci_driver = {
2696         .name = QEDI_MODULE_NAME,
2697         .id_table = qedi_pci_tbl,
2698         .probe = qedi_probe,
2699         .remove = qedi_remove,
2700 };
2701
2702 static int __init qedi_init(void)
2703 {
2704         struct qedi_percpu_s *p;
2705         int cpu, rc = 0;
2706
2707         qedi_ops = qed_get_iscsi_ops();
2708         if (!qedi_ops) {
2709                 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2710                 return -EINVAL;
2711         }
2712
2713 #ifdef CONFIG_DEBUG_FS
2714         qedi_dbg_init("qedi");
2715 #endif
2716
2717         qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2718         if (!qedi_scsi_transport) {
2719                 QEDI_ERR(NULL, "Could not register qedi transport");
2720                 rc = -ENOMEM;
2721                 goto exit_qedi_init_1;
2722         }
2723
2724         for_each_possible_cpu(cpu) {
2725                 p = &per_cpu(qedi_percpu, cpu);
2726                 INIT_LIST_HEAD(&p->work_list);
2727                 spin_lock_init(&p->p_work_lock);
2728                 p->iothread = NULL;
2729         }
2730
2731         rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2732                                qedi_cpu_online, qedi_cpu_offline);
2733         if (rc < 0)
2734                 goto exit_qedi_init_2;
2735         qedi_cpuhp_state = rc;
2736
2737         rc = pci_register_driver(&qedi_pci_driver);
2738         if (rc) {
2739                 QEDI_ERR(NULL, "Failed to register driver\n");
2740                 goto exit_qedi_hp;
2741         }
2742
2743         return 0;
2744
2745 exit_qedi_hp:
2746         cpuhp_remove_state(qedi_cpuhp_state);
2747 exit_qedi_init_2:
2748         iscsi_unregister_transport(&qedi_iscsi_transport);
2749 exit_qedi_init_1:
2750 #ifdef CONFIG_DEBUG_FS
2751         qedi_dbg_exit();
2752 #endif
2753         qed_put_iscsi_ops();
2754         return rc;
2755 }
2756
2757 static void __exit qedi_cleanup(void)
2758 {
2759         pci_unregister_driver(&qedi_pci_driver);
2760         cpuhp_remove_state(qedi_cpuhp_state);
2761         iscsi_unregister_transport(&qedi_iscsi_transport);
2762
2763 #ifdef CONFIG_DEBUG_FS
2764         qedi_dbg_exit();
2765 #endif
2766         qed_put_iscsi_ops();
2767 }
2768
2769 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2770 MODULE_LICENSE("GPL");
2771 MODULE_AUTHOR("QLogic Corporation");
2772 MODULE_VERSION(QEDI_MODULE_VERSION);
2773 module_init(qedi_init);
2774 module_exit(qedi_cleanup);