drivers/scsi/qedi/qedi_main.c

   1 /*
   2  * QLogic iSCSI Offload Driver
   3  * Copyright (c) 2016 Cavium Inc.
   4  *
   5  * This software is available under the terms of the GNU General Public License
   6  * (GPL) Version 2, available from the file COPYING in the main directory of
   7  * this source tree.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/pci.h>
  12 #include <linux/kernel.h>
  13 #include <linux/if_arp.h>
  14 #include <scsi/iscsi_if.h>
  15 #include <linux/inet.h>
  16 #include <net/arp.h>
  17 #include <linux/list.h>
  18 #include <linux/kthread.h>
  19 #include <linux/mm.h>
  20 #include <linux/if_vlan.h>
  21 #include <linux/cpu.h>
  22 #include <linux/iscsi_boot_sysfs.h>
  23
  24 #include <scsi/scsi_cmnd.h>
  25 #include <scsi/scsi_device.h>
  26 #include <scsi/scsi_eh.h>
  27 #include <scsi/scsi_host.h>
  28 #include <scsi/scsi.h>
  29
  30 #include "qedi.h"
  31 #include "qedi_gbl.h"
  32 #include "qedi_iscsi.h"
  33
  34 static uint qedi_fw_debug;
  35 module_param(qedi_fw_debug, uint, 0644);
  36 MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
  37
  38 uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
  39 module_param(qedi_dbg_log, uint, 0644);
  40 MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
  41
  42 uint qedi_io_tracing;
  43 module_param(qedi_io_tracing, uint, 0644);
  44 MODULE_PARM_DESC(qedi_io_tracing,
  45                  " Enable logging of SCSI requests/completions into trace buffer. (default off).");
  46
  47 const struct qed_iscsi_ops *qedi_ops;
  48 static struct scsi_transport_template *qedi_scsi_transport;
  49 static struct pci_driver qedi_pci_driver;
  50 static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
  51 static LIST_HEAD(qedi_udev_list);
  52 /* Static function declaration */
  53 static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
  54 static void qedi_free_global_queues(struct qedi_ctx *qedi);
  55 static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
  56 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
  57 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
  58 static struct nvm_iscsi_block *qedi_get_nvram_block(struct qedi_ctx *qedi);
  59
  60 static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
  61 {
  62         struct qedi_ctx *qedi;
  63         struct qedi_endpoint *qedi_ep;
  64         struct iscsi_eqe_data *data;
  65         int rval = 0;
  66
  67         if (!context || !fw_handle) {
  68                 QEDI_ERR(NULL, "Recv event with ctx NULL\n");
  69                 return -EINVAL;
  70         }
  71
  72         qedi = (struct qedi_ctx *)context;
  73         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  74                   "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
  75
  76         data = (struct iscsi_eqe_data *)fw_handle;
  77         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  78                   "icid=0x%x conn_id=0x%x err-code=0x%x error-pdu-opcode-reserved=0x%x\n",
  79                    data->icid, data->conn_id, data->error_code,
  80                    data->error_pdu_opcode_reserved);
  81
  82         qedi_ep = qedi->ep_tbl[data->icid];
  83
  84         if (!qedi_ep) {
  85                 QEDI_WARN(&qedi->dbg_ctx,
  86                           "Cannot process event, ep already disconnected, cid=0x%x\n",
  87                            data->icid);
  88                 WARN_ON(1);
  89                 return -ENODEV;
  90         }
  91
  92         switch (fw_event_code) {
  93         case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
  94                 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
  95                         qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
  96
  97                 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
  98                 break;
  99         case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
 100                 qedi_ep->state = EP_STATE_DISCONN_COMPL;
 101                 wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
 102                 break;
 103         case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
 104                 qedi_process_iscsi_error(qedi_ep, data);
 105                 break;
 106         case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
 107         case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
 108         case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
 109         case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
 110         case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
 111         case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
 112         case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
 113                 qedi_process_tcp_error(qedi_ep, data);
 114                 break;
 115         default:
 116                 QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
 117                          fw_event_code);
 118         }
 119
 120         return rval;
 121 }
 122
 123 static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
 124 {
 125         struct qedi_uio_dev *udev = uinfo->priv;
 126         struct qedi_ctx *qedi = udev->qedi;
 127
 128         if (!capable(CAP_NET_ADMIN))
 129                 return -EPERM;
 130
 131         if (udev->uio_dev != -1)
 132                 return -EBUSY;
 133
 134         rtnl_lock();
 135         udev->uio_dev = iminor(inode);
 136         qedi_reset_uio_rings(udev);
 137         set_bit(UIO_DEV_OPENED, &qedi->flags);
 138         rtnl_unlock();
 139
 140         return 0;
 141 }
 142
 143 static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
 144 {
 145         struct qedi_uio_dev *udev = uinfo->priv;
 146         struct qedi_ctx *qedi = udev->qedi;
 147
 148         udev->uio_dev = -1;
 149         clear_bit(UIO_DEV_OPENED, &qedi->flags);
 150         qedi_ll2_free_skbs(qedi);
 151         return 0;
 152 }
 153
 154 static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
 155 {
 156         if (udev->uctrl) {
 157                 free_page((unsigned long)udev->uctrl);
 158                 udev->uctrl = NULL;
 159         }
 160
 161         if (udev->ll2_ring) {
 162                 free_page((unsigned long)udev->ll2_ring);
 163                 udev->ll2_ring = NULL;
 164         }
 165
 166         if (udev->ll2_buf) {
 167                 free_pages((unsigned long)udev->ll2_buf, 2);
 168                 udev->ll2_buf = NULL;
 169         }
 170 }
 171
 172 static void __qedi_free_uio(struct qedi_uio_dev *udev)
 173 {
 174         uio_unregister_device(&udev->qedi_uinfo);
 175
 176         __qedi_free_uio_rings(udev);
 177
 178         pci_dev_put(udev->pdev);
 179         kfree(udev);
 180 }
 181
 182 static void qedi_free_uio(struct qedi_uio_dev *udev)
 183 {
 184         if (!udev)
 185                 return;
 186
 187         list_del_init(&udev->list);
 188         __qedi_free_uio(udev);
 189 }
 190
 191 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
 192 {
 193         struct qedi_ctx *qedi = NULL;
 194         struct qedi_uio_ctrl *uctrl = NULL;
 195
 196         qedi = udev->qedi;
 197         uctrl = udev->uctrl;
 198
 199         spin_lock_bh(&qedi->ll2_lock);
 200         uctrl->host_rx_cons = 0;
 201         uctrl->hw_rx_prod = 0;
 202         uctrl->hw_rx_bd_prod = 0;
 203         uctrl->host_rx_bd_cons = 0;
 204
 205         memset(udev->ll2_ring, 0, udev->ll2_ring_size);
 206         memset(udev->ll2_buf, 0, udev->ll2_buf_size);
 207         spin_unlock_bh(&qedi->ll2_lock);
 208 }
 209
 210 static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
 211 {
 212         int rc = 0;
 213
 214         if (udev->ll2_ring || udev->ll2_buf)
 215                 return rc;
 216
 217         /* Memory for control area.  */
 218         udev->uctrl = (void *)get_zeroed_page(GFP_KERNEL);
 219         if (!udev->uctrl)
 220                 return -ENOMEM;
 221
 222         /* Allocating memory for LL2 ring  */
 223         udev->ll2_ring_size = QEDI_PAGE_SIZE;
 224         udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
 225         if (!udev->ll2_ring) {
 226                 rc = -ENOMEM;
 227                 goto exit_alloc_ring;
 228         }
 229
 230         /* Allocating memory for Tx/Rx pkt buffer */
 231         udev->ll2_buf_size = TX_RX_RING * LL2_SINGLE_BUF_SIZE;
 232         udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
 233         udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
 234                                                  __GFP_ZERO, 2);
 235         if (!udev->ll2_buf) {
 236                 rc = -ENOMEM;
 237                 goto exit_alloc_buf;
 238         }
 239         return rc;
 240
 241 exit_alloc_buf:
 242         free_page((unsigned long)udev->ll2_ring);
 243         udev->ll2_ring = NULL;
 244 exit_alloc_ring:
 245         return rc;
 246 }
 247
 248 static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
 249 {
 250         struct qedi_uio_dev *udev = NULL;
 251         int rc = 0;
 252
 253         list_for_each_entry(udev, &qedi_udev_list, list) {
 254                 if (udev->pdev == qedi->pdev) {
 255                         udev->qedi = qedi;
 256                         if (__qedi_alloc_uio_rings(udev)) {
 257                                 udev->qedi = NULL;
 258                                 return -ENOMEM;
 259                         }
 260                         qedi->udev = udev;
 261                         return 0;
 262                 }
 263         }
 264
 265         udev = kzalloc(sizeof(*udev), GFP_KERNEL);
 266         if (!udev) {
 267                 rc = -ENOMEM;
 268                 goto err_udev;
 269         }
 270
 271         udev->uio_dev = -1;
 272
 273         udev->qedi = qedi;
 274         udev->pdev = qedi->pdev;
 275
 276         rc = __qedi_alloc_uio_rings(udev);
 277         if (rc)
 278                 goto err_uctrl;
 279
 280         list_add(&udev->list, &qedi_udev_list);
 281
 282         pci_dev_get(udev->pdev);
 283         qedi->udev = udev;
 284
 285         udev->tx_pkt = udev->ll2_buf;
 286         udev->rx_pkt = udev->ll2_buf + LL2_SINGLE_BUF_SIZE;
 287         return 0;
 288
 289  err_uctrl:
 290         kfree(udev);
 291  err_udev:
 292         return -ENOMEM;
 293 }
 294
 295 static int qedi_init_uio(struct qedi_ctx *qedi)
 296 {
 297         struct qedi_uio_dev *udev = qedi->udev;
 298         struct uio_info *uinfo;
 299         int ret = 0;
 300
 301         if (!udev)
 302                 return -ENOMEM;
 303
 304         uinfo = &udev->qedi_uinfo;
 305
 306         uinfo->mem[0].addr = (unsigned long)udev->uctrl;
 307         uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
 308         uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
 309
 310         uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
 311         uinfo->mem[1].size = udev->ll2_ring_size;
 312         uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
 313
 314         uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
 315         uinfo->mem[2].size = udev->ll2_buf_size;
 316         uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
 317
 318         uinfo->name = "qedi_uio";
 319         uinfo->version = QEDI_MODULE_VERSION;
 320         uinfo->irq = UIO_IRQ_CUSTOM;
 321
 322         uinfo->open = qedi_uio_open;
 323         uinfo->release = qedi_uio_close;
 324
 325         if (udev->uio_dev == -1) {
 326                 if (!uinfo->priv) {
 327                         uinfo->priv = udev;
 328
 329                         ret = uio_register_device(&udev->pdev->dev, uinfo);
 330                         if (ret) {
 331                                 QEDI_ERR(&qedi->dbg_ctx,
 332                                          "UIO registration failed\n");
 333                         }
 334                 }
 335         }
 336
 337         return ret;
 338 }
 339
 340 static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
 341                                   struct qed_sb_info *sb_info, u16 sb_id)
 342 {
 343         struct status_block_e4 *sb_virt;
 344         dma_addr_t sb_phys;
 345         int ret;
 346
 347         sb_virt = dma_alloc_coherent(&qedi->pdev->dev,
 348                                      sizeof(struct status_block_e4), &sb_phys,
 349                                      GFP_KERNEL);
 350         if (!sb_virt) {
 351                 QEDI_ERR(&qedi->dbg_ctx,
 352                          "Status block allocation failed for id = %d.\n",
 353                           sb_id);
 354                 return -ENOMEM;
 355         }
 356
 357         ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
 358                                        sb_id, QED_SB_TYPE_STORAGE);
 359         if (ret) {
 360                 QEDI_ERR(&qedi->dbg_ctx,
 361                          "Status block initialization failed for id = %d.\n",
 362                           sb_id);
 363                 return ret;
 364         }
 365
 366         return 0;
 367 }
 368
 369 static void qedi_free_sb(struct qedi_ctx *qedi)
 370 {
 371         struct qed_sb_info *sb_info;
 372         int id;
 373
 374         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 375                 sb_info = &qedi->sb_array[id];
 376                 if (sb_info->sb_virt)
 377                         dma_free_coherent(&qedi->pdev->dev,
 378                                           sizeof(*sb_info->sb_virt),
 379                                           (void *)sb_info->sb_virt,
 380                                           sb_info->sb_phys);
 381         }
 382 }
 383
 384 static void qedi_free_fp(struct qedi_ctx *qedi)
 385 {
 386         kfree(qedi->fp_array);
 387         kfree(qedi->sb_array);
 388 }
 389
 390 static void qedi_destroy_fp(struct qedi_ctx *qedi)
 391 {
 392         qedi_free_sb(qedi);
 393         qedi_free_fp(qedi);
 394 }
 395
 396 static int qedi_alloc_fp(struct qedi_ctx *qedi)
 397 {
 398         int ret = 0;
 399
 400         qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
 401                                  sizeof(struct qedi_fastpath), GFP_KERNEL);
 402         if (!qedi->fp_array) {
 403                 QEDI_ERR(&qedi->dbg_ctx,
 404                          "fastpath fp array allocation failed.\n");
 405                 return -ENOMEM;
 406         }
 407
 408         qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
 409                                  sizeof(struct qed_sb_info), GFP_KERNEL);
 410         if (!qedi->sb_array) {
 411                 QEDI_ERR(&qedi->dbg_ctx,
 412                          "fastpath sb array allocation failed.\n");
 413                 ret = -ENOMEM;
 414                 goto free_fp;
 415         }
 416
 417         return ret;
 418
 419 free_fp:
 420         qedi_free_fp(qedi);
 421         return ret;
 422 }
 423
 424 static void qedi_int_fp(struct qedi_ctx *qedi)
 425 {
 426         struct qedi_fastpath *fp;
 427         int id;
 428
 429         memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
 430                sizeof(*qedi->fp_array));
 431         memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
 432                sizeof(*qedi->sb_array));
 433
 434         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 435                 fp = &qedi->fp_array[id];
 436                 fp->sb_info = &qedi->sb_array[id];
 437                 fp->sb_id = id;
 438                 fp->qedi = qedi;
 439                 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
 440                          "qedi", id);
 441
 442                 /* fp_array[i] ---- irq cookie
 443                  * So init data which is needed in int ctx
 444                  */
 445         }
 446 }
 447
 448 static int qedi_prepare_fp(struct qedi_ctx *qedi)
 449 {
 450         struct qedi_fastpath *fp;
 451         int id, ret = 0;
 452
 453         ret = qedi_alloc_fp(qedi);
 454         if (ret)
 455                 goto err;
 456
 457         qedi_int_fp(qedi);
 458
 459         for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
 460                 fp = &qedi->fp_array[id];
 461                 ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
 462                 if (ret) {
 463                         QEDI_ERR(&qedi->dbg_ctx,
 464                                  "SB allocation and initialization failed.\n");
 465                         ret = -EIO;
 466                         goto err_init;
 467                 }
 468         }
 469
 470         return 0;
 471
 472 err_init:
 473         qedi_free_sb(qedi);
 474         qedi_free_fp(qedi);
 475 err:
 476         return ret;
 477 }
 478
 479 static int qedi_setup_cid_que(struct qedi_ctx *qedi)
 480 {
 481         int i;
 482
 483         qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
 484                                                    sizeof(u32), GFP_KERNEL);
 485         if (!qedi->cid_que.cid_que_base)
 486                 return -ENOMEM;
 487
 488         qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
 489                                                    sizeof(struct qedi_conn *),
 490                                                    GFP_KERNEL);
 491         if (!qedi->cid_que.conn_cid_tbl) {
 492                 kfree(qedi->cid_que.cid_que_base);
 493                 qedi->cid_que.cid_que_base = NULL;
 494                 return -ENOMEM;
 495         }
 496
 497         qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
 498         qedi->cid_que.cid_q_prod_idx = 0;
 499         qedi->cid_que.cid_q_cons_idx = 0;
 500         qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
 501         qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
 502
 503         for (i = 0; i < qedi->max_active_conns; i++) {
 504                 qedi->cid_que.cid_que[i] = i;
 505                 qedi->cid_que.conn_cid_tbl[i] = NULL;
 506         }
 507
 508         return 0;
 509 }
 510
 511 static void qedi_release_cid_que(struct qedi_ctx *qedi)
 512 {
 513         kfree(qedi->cid_que.cid_que_base);
 514         qedi->cid_que.cid_que_base = NULL;
 515
 516         kfree(qedi->cid_que.conn_cid_tbl);
 517         qedi->cid_que.conn_cid_tbl = NULL;
 518 }
 519
 520 static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
 521                             u16 start_id, u16 next)
 522 {
 523         id_tbl->start = start_id;
 524         id_tbl->max = size;
 525         id_tbl->next = next;
 526         spin_lock_init(&id_tbl->lock);
 527         id_tbl->table = kcalloc(BITS_TO_LONGS(size), sizeof(long), GFP_KERNEL);
 528         if (!id_tbl->table)
 529                 return -ENOMEM;
 530
 531         return 0;
 532 }
 533
 534 static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
 535 {
 536         kfree(id_tbl->table);
 537         id_tbl->table = NULL;
 538 }
 539
 540 int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
 541 {
 542         int ret = -1;
 543
 544         id -= id_tbl->start;
 545         if (id >= id_tbl->max)
 546                 return ret;
 547
 548         spin_lock(&id_tbl->lock);
 549         if (!test_bit(id, id_tbl->table)) {
 550                 set_bit(id, id_tbl->table);
 551                 ret = 0;
 552         }
 553         spin_unlock(&id_tbl->lock);
 554         return ret;
 555 }
 556
 557 u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
 558 {
 559         u16 id;
 560
 561         spin_lock(&id_tbl->lock);
 562         id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
 563         if (id >= id_tbl->max) {
 564                 id = QEDI_LOCAL_PORT_INVALID;
 565                 if (id_tbl->next != 0) {
 566                         id = find_first_zero_bit(id_tbl->table, id_tbl->next);
 567                         if (id >= id_tbl->next)
 568                                 id = QEDI_LOCAL_PORT_INVALID;
 569                 }
 570         }
 571
 572         if (id < id_tbl->max) {
 573                 set_bit(id, id_tbl->table);
 574                 id_tbl->next = (id + 1) & (id_tbl->max - 1);
 575                 id += id_tbl->start;
 576         }
 577
 578         spin_unlock(&id_tbl->lock);
 579
 580         return id;
 581 }
 582
 583 void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
 584 {
 585         if (id == QEDI_LOCAL_PORT_INVALID)
 586                 return;
 587
 588         id -= id_tbl->start;
 589         if (id >= id_tbl->max)
 590                 return;
 591
 592         clear_bit(id, id_tbl->table);
 593 }
 594
 595 static void qedi_cm_free_mem(struct qedi_ctx *qedi)
 596 {
 597         kfree(qedi->ep_tbl);
 598         qedi->ep_tbl = NULL;
 599         qedi_free_id_tbl(&qedi->lcl_port_tbl);
 600 }
 601
 602 static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
 603 {
 604         u16 port_id;
 605
 606         qedi->ep_tbl = kzalloc((qedi->max_active_conns *
 607                                 sizeof(struct qedi_endpoint *)), GFP_KERNEL);
 608         if (!qedi->ep_tbl)
 609                 return -ENOMEM;
 610         port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
 611         if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
 612                              QEDI_LOCAL_PORT_MIN, port_id)) {
 613                 qedi_cm_free_mem(qedi);
 614                 return -ENOMEM;
 615         }
 616
 617         return 0;
 618 }
 619
 620 static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
 621 {
 622         struct Scsi_Host *shost;
 623         struct qedi_ctx *qedi = NULL;
 624
 625         shost = iscsi_host_alloc(&qedi_host_template,
 626                                  sizeof(struct qedi_ctx), 0);
 627         if (!shost) {
 628                 QEDI_ERR(NULL, "Could not allocate shost\n");
 629                 goto exit_setup_shost;
 630         }
 631
 632         shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA - 1;
 633         shost->max_channel = 0;
 634         shost->max_lun = ~0;
 635         shost->max_cmd_len = 16;
 636         shost->transportt = qedi_scsi_transport;
 637
 638         qedi = iscsi_host_priv(shost);
 639         memset(qedi, 0, sizeof(*qedi));
 640         qedi->shost = shost;
 641         qedi->dbg_ctx.host_no = shost->host_no;
 642         qedi->pdev = pdev;
 643         qedi->dbg_ctx.pdev = pdev;
 644         qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
 645         qedi->max_sqes = QEDI_SQ_SIZE;
 646
 647         if (shost_use_blk_mq(shost))
 648                 shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
 649
 650         pci_set_drvdata(pdev, qedi);
 651
 652 exit_setup_shost:
 653         return qedi;
 654 }
 655
 656 static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
 657 {
 658         struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
 659         struct qedi_uio_dev *udev;
 660         struct qedi_uio_ctrl *uctrl;
 661         struct skb_work_list *work;
 662         u32 prod;
 663
 664         if (!qedi) {
 665                 QEDI_ERR(NULL, "qedi is NULL\n");
 666                 return -1;
 667         }
 668
 669         if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
 670                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
 671                           "UIO DEV is not opened\n");
 672                 kfree_skb(skb);
 673                 return 0;
 674         }
 675
 676         udev = qedi->udev;
 677         uctrl = udev->uctrl;
 678
 679         work = kzalloc(sizeof(*work), GFP_ATOMIC);
 680         if (!work) {
 681                 QEDI_WARN(&qedi->dbg_ctx,
 682                           "Could not allocate work so dropping frame.\n");
 683                 kfree_skb(skb);
 684                 return 0;
 685         }
 686
 687         INIT_LIST_HEAD(&work->list);
 688         work->skb = skb;
 689
 690         if (skb_vlan_tag_present(skb))
 691                 work->vlan_id = skb_vlan_tag_get(skb);
 692
 693         if (work->vlan_id)
 694                 __vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
 695
 696         spin_lock_bh(&qedi->ll2_lock);
 697         list_add_tail(&work->list, &qedi->ll2_skb_list);
 698
 699         ++uctrl->hw_rx_prod_cnt;
 700         prod = (uctrl->hw_rx_prod + 1) % RX_RING;
 701         if (prod != uctrl->host_rx_cons) {
 702                 uctrl->hw_rx_prod = prod;
 703                 spin_unlock_bh(&qedi->ll2_lock);
 704                 wake_up_process(qedi->ll2_recv_thread);
 705                 return 0;
 706         }
 707
 708         spin_unlock_bh(&qedi->ll2_lock);
 709         return 0;
 710 }
 711
 712 /* map this skb to iscsiuio mmaped region */
 713 static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
 714                                 u16 vlan_id)
 715 {
 716         struct qedi_uio_dev *udev = NULL;
 717         struct qedi_uio_ctrl *uctrl = NULL;
 718         struct qedi_rx_bd rxbd;
 719         struct qedi_rx_bd *p_rxbd;
 720         u32 rx_bd_prod;
 721         void *pkt;
 722         int len = 0;
 723
 724         if (!qedi) {
 725                 QEDI_ERR(NULL, "qedi is NULL\n");
 726                 return -1;
 727         }
 728
 729         udev = qedi->udev;
 730         uctrl = udev->uctrl;
 731         pkt = udev->rx_pkt + (uctrl->hw_rx_prod * LL2_SINGLE_BUF_SIZE);
 732         len = min_t(u32, skb->len, (u32)LL2_SINGLE_BUF_SIZE);
 733         memcpy(pkt, skb->data, len);
 734
 735         memset(&rxbd, 0, sizeof(rxbd));
 736         rxbd.rx_pkt_index = uctrl->hw_rx_prod;
 737         rxbd.rx_pkt_len = len;
 738         rxbd.vlan_id = vlan_id;
 739
 740         uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
 741         rx_bd_prod = uctrl->hw_rx_bd_prod;
 742         p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
 743         p_rxbd += rx_bd_prod;
 744
 745         memcpy(p_rxbd, &rxbd, sizeof(rxbd));
 746
 747         /* notify the iscsiuio about new packet */
 748         uio_event_notify(&udev->qedi_uinfo);
 749
 750         return 0;
 751 }
 752
 753 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
 754 {
 755         struct skb_work_list *work, *work_tmp;
 756
 757         spin_lock_bh(&qedi->ll2_lock);
 758         list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
 759                 list_del(&work->list);
 760                 if (work->skb)
 761                         kfree_skb(work->skb);
 762                 kfree(work);
 763         }
 764         spin_unlock_bh(&qedi->ll2_lock);
 765 }
 766
 767 static int qedi_ll2_recv_thread(void *arg)
 768 {
 769         struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
 770         struct skb_work_list *work, *work_tmp;
 771
 772         set_user_nice(current, -20);
 773
 774         while (!kthread_should_stop()) {
 775                 spin_lock_bh(&qedi->ll2_lock);
 776                 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
 777                                          list) {
 778                         list_del(&work->list);
 779                         qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
 780                         kfree_skb(work->skb);
 781                         kfree(work);
 782                 }
 783                 set_current_state(TASK_INTERRUPTIBLE);
 784                 spin_unlock_bh(&qedi->ll2_lock);
 785                 schedule();
 786         }
 787
 788         __set_current_state(TASK_RUNNING);
 789         return 0;
 790 }
 791
 792 static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
 793 {
 794         u8 num_sq_pages;
 795         u32 log_page_size;
 796         int rval = 0;
 797
 798
 799         num_sq_pages = (MAX_OUSTANDING_TASKS_PER_CON * 8) / PAGE_SIZE;
 800
 801         qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
 802
 803         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 804                   "Number of CQ count is %d\n", qedi->num_queues);
 805
 806         memset(&qedi->pf_params.iscsi_pf_params, 0,
 807                sizeof(qedi->pf_params.iscsi_pf_params));
 808
 809         qedi->p_cpuq = pci_alloc_consistent(qedi->pdev,
 810                         qedi->num_queues * sizeof(struct qedi_glbl_q_params),
 811                         &qedi->hw_p_cpuq);
 812         if (!qedi->p_cpuq) {
 813                 QEDI_ERR(&qedi->dbg_ctx, "pci_alloc_consistent fail\n");
 814                 rval = -1;
 815                 goto err_alloc_mem;
 816         }
 817
 818         rval = qedi_alloc_global_queues(qedi);
 819         if (rval) {
 820                 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
 821                 rval = -1;
 822                 goto err_alloc_mem;
 823         }
 824
 825         qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
 826         qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
 827         qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
 828         qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
 829         qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
 830         qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
 831         qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
 832         qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
 833         qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000;
 834         qedi->pf_params.iscsi_pf_params.max_fin_rt = 2;
 835
 836         for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
 837                 if ((1 << log_page_size) == PAGE_SIZE)
 838                         break;
 839         }
 840         qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
 841
 842         qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
 843                                                            (u64)qedi->hw_p_cpuq;
 844
 845         /* RQ BDQ initializations.
 846          * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
 847          * rqe_log_size: 8 for 256B RQE
 848          */
 849         qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
 850         /* BDQ address and size */
 851         qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
 852                                                         qedi->bdq_pbl_list_dma;
 853         qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
 854                                                 qedi->bdq_pbl_list_num_entries;
 855         qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
 856
 857         /* cq_num_entries: num_tasks + rq_num_entries */
 858         qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
 859
 860         qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
 861         qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
 862
 863 err_alloc_mem:
 864         return rval;
 865 }
 866
 867 /* Free DMA coherent memory for array of queue pointers we pass to qed */
 868 static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
 869 {
 870         size_t size = 0;
 871
 872         if (qedi->p_cpuq) {
 873                 size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
 874                 pci_free_consistent(qedi->pdev, size, qedi->p_cpuq,
 875                                     qedi->hw_p_cpuq);
 876         }
 877
 878         qedi_free_global_queues(qedi);
 879
 880         kfree(qedi->global_queues);
 881 }
 882
 883 static void qedi_get_boot_tgt_info(struct nvm_iscsi_block *block,
 884                                    struct qedi_boot_target *tgt, u8 index)
 885 {
 886         u32 ipv6_en;
 887
 888         ipv6_en = !!(block->generic.ctrl_flags &
 889                      NVM_ISCSI_CFG_GEN_IPV6_ENABLED);
 890
 891         snprintf(tgt->iscsi_name, sizeof(tgt->iscsi_name), "%s\n",
 892                  block->target[index].target_name.byte);
 893
 894         tgt->ipv6_en = ipv6_en;
 895
 896         if (ipv6_en)
 897                 snprintf(tgt->ip_addr, IPV6_LEN, "%pI6\n",
 898                          block->target[index].ipv6_addr.byte);
 899         else
 900                 snprintf(tgt->ip_addr, IPV4_LEN, "%pI4\n",
 901                          block->target[index].ipv4_addr.byte);
 902 }
 903
 904 static int qedi_find_boot_info(struct qedi_ctx *qedi,
 905                                struct qed_mfw_tlv_iscsi *iscsi,
 906                                struct nvm_iscsi_block *block)
 907 {
 908         struct qedi_boot_target *pri_tgt = NULL, *sec_tgt = NULL;
 909         u32 pri_ctrl_flags = 0, sec_ctrl_flags = 0, found = 0;
 910         struct iscsi_cls_session *cls_sess;
 911         struct iscsi_cls_conn *cls_conn;
 912         struct qedi_conn *qedi_conn;
 913         struct iscsi_session *sess;
 914         struct iscsi_conn *conn;
 915         char ep_ip_addr[64];
 916         int i, ret = 0;
 917
 918         pri_ctrl_flags = !!(block->target[0].ctrl_flags &
 919                                         NVM_ISCSI_CFG_TARGET_ENABLED);
 920         if (pri_ctrl_flags) {
 921                 pri_tgt = kzalloc(sizeof(*pri_tgt), GFP_KERNEL);
 922                 if (!pri_tgt)
 923                         return -1;
 924                 qedi_get_boot_tgt_info(block, pri_tgt, 0);
 925         }
 926
 927         sec_ctrl_flags = !!(block->target[1].ctrl_flags &
 928                                         NVM_ISCSI_CFG_TARGET_ENABLED);
 929         if (sec_ctrl_flags) {
 930                 sec_tgt = kzalloc(sizeof(*sec_tgt), GFP_KERNEL);
 931                 if (!sec_tgt) {
 932                         ret = -1;
 933                         goto free_tgt;
 934                 }
 935                 qedi_get_boot_tgt_info(block, sec_tgt, 1);
 936         }
 937
 938         for (i = 0; i < qedi->max_active_conns; i++) {
 939                 qedi_conn = qedi_get_conn_from_id(qedi, i);
 940                 if (!qedi_conn)
 941                         continue;
 942
 943                 if (qedi_conn->ep->ip_type == TCP_IPV4)
 944                         snprintf(ep_ip_addr, IPV4_LEN, "%pI4\n",
 945                                  qedi_conn->ep->dst_addr);
 946                 else
 947                         snprintf(ep_ip_addr, IPV6_LEN, "%pI6\n",
 948                                  qedi_conn->ep->dst_addr);
 949
 950                 cls_conn = qedi_conn->cls_conn;
 951                 conn = cls_conn->dd_data;
 952                 cls_sess = iscsi_conn_to_session(cls_conn);
 953                 sess = cls_sess->dd_data;
 954
 955                 if (!iscsi_is_session_online(cls_sess))
 956                         continue;
 957
 958                 if (!sess->targetname)
 959                         continue;
 960
 961                 if (pri_ctrl_flags) {
 962                         if (!strcmp(pri_tgt->iscsi_name, sess->targetname) &&
 963                             !strcmp(pri_tgt->ip_addr, ep_ip_addr)) {
 964                                 found = 1;
 965                                 break;
 966                         }
 967                 }
 968
 969                 if (sec_ctrl_flags) {
 970                         if (!strcmp(sec_tgt->iscsi_name, sess->targetname) &&
 971                             !strcmp(sec_tgt->ip_addr, ep_ip_addr)) {
 972                                 found = 1;
 973                                 break;
 974                         }
 975                 }
 976         }
 977
 978         if (found) {
 979                 if (conn->hdrdgst_en) {
 980                         iscsi->header_digest_set = true;
 981                         iscsi->header_digest = 1;
 982                 }
 983
 984                 if (conn->datadgst_en) {
 985                         iscsi->data_digest_set = true;
 986                         iscsi->data_digest = 1;
 987                 }
 988                 iscsi->boot_taget_portal_set = true;
 989                 iscsi->boot_taget_portal = sess->tpgt;
 990
 991         } else {
 992                 ret = -1;
 993         }
 994
 995         if (sec_ctrl_flags)
 996                 kfree(sec_tgt);
 997 free_tgt:
 998         if (pri_ctrl_flags)
 999                 kfree(pri_tgt);
1000
1001         return ret;
1002 }
1003
1004 static void qedi_get_generic_tlv_data(void *dev, struct qed_generic_tlvs *data)
1005 {
1006         struct qedi_ctx *qedi;
1007
1008         if (!dev) {
1009                 QEDI_INFO(NULL, QEDI_LOG_EVT,
1010                           "dev is NULL so ignoring get_generic_tlv_data request.\n");
1011                 return;
1012         }
1013         qedi = (struct qedi_ctx *)dev;
1014
1015         memset(data, 0, sizeof(struct qed_generic_tlvs));
1016         ether_addr_copy(data->mac[0], qedi->mac);
1017 }
1018
1019 /*
1020  * Protocol TLV handler
1021  */
1022 static void qedi_get_protocol_tlv_data(void *dev, void *data)
1023 {
1024         struct qed_mfw_tlv_iscsi *iscsi = data;
1025         struct qed_iscsi_stats *fw_iscsi_stats;
1026         struct nvm_iscsi_block *block = NULL;
1027         u32 chap_en = 0, mchap_en = 0;
1028         struct qedi_ctx *qedi = dev;
1029         int rval = 0;
1030
1031         fw_iscsi_stats = kmalloc(sizeof(*fw_iscsi_stats), GFP_KERNEL);
1032         if (!fw_iscsi_stats) {
1033                 QEDI_ERR(&qedi->dbg_ctx,
1034                          "Could not allocate memory for fw_iscsi_stats.\n");
1035                 goto exit_get_data;
1036         }
1037
1038         mutex_lock(&qedi->stats_lock);
1039         /* Query firmware for offload stats */
1040         qedi_ops->get_stats(qedi->cdev, fw_iscsi_stats);
1041         mutex_unlock(&qedi->stats_lock);
1042
1043         iscsi->rx_frames_set = true;
1044         iscsi->rx_frames = fw_iscsi_stats->iscsi_rx_packet_cnt;
1045         iscsi->rx_bytes_set = true;
1046         iscsi->rx_bytes = fw_iscsi_stats->iscsi_rx_bytes_cnt;
1047         iscsi->tx_frames_set = true;
1048         iscsi->tx_frames = fw_iscsi_stats->iscsi_tx_packet_cnt;
1049         iscsi->tx_bytes_set = true;
1050         iscsi->tx_bytes = fw_iscsi_stats->iscsi_tx_bytes_cnt;
1051         iscsi->frame_size_set = true;
1052         iscsi->frame_size = qedi->ll2_mtu;
1053         block = qedi_get_nvram_block(qedi);
1054         if (block) {
1055                 chap_en = !!(block->generic.ctrl_flags &
1056                              NVM_ISCSI_CFG_GEN_CHAP_ENABLED);
1057                 mchap_en = !!(block->generic.ctrl_flags &
1058                               NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED);
1059
1060                 iscsi->auth_method_set = (chap_en || mchap_en) ? true : false;
1061                 iscsi->auth_method = 1;
1062                 if (chap_en)
1063                         iscsi->auth_method = 2;
1064                 if (mchap_en)
1065                         iscsi->auth_method = 3;
1066
1067                 iscsi->tx_desc_size_set = true;
1068                 iscsi->tx_desc_size = QEDI_SQ_SIZE;
1069                 iscsi->rx_desc_size_set = true;
1070                 iscsi->rx_desc_size = QEDI_CQ_SIZE;
1071
1072                 /* tpgt, hdr digest, data digest */
1073                 rval = qedi_find_boot_info(qedi, iscsi, block);
1074                 if (rval)
1075                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1076                                   "Boot target not set");
1077         }
1078
1079         kfree(fw_iscsi_stats);
1080 exit_get_data:
1081         return;
1082 }
1083
1084 static void qedi_link_update(void *dev, struct qed_link_output *link)
1085 {
1086         struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
1087
1088         if (link->link_up) {
1089                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
1090                 atomic_set(&qedi->link_state, QEDI_LINK_UP);
1091         } else {
1092                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1093                           "Link Down event.\n");
1094                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1095         }
1096 }
1097
1098 static struct qed_iscsi_cb_ops qedi_cb_ops = {
1099         {
1100                 .link_update =          qedi_link_update,
1101                 .get_protocol_tlv_data = qedi_get_protocol_tlv_data,
1102                 .get_generic_tlv_data = qedi_get_generic_tlv_data,
1103         }
1104 };
1105
1106 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
1107                           u16 que_idx, struct qedi_percpu_s *p)
1108 {
1109         struct qedi_work *qedi_work;
1110         struct qedi_conn *q_conn;
1111         struct iscsi_conn *conn;
1112         struct qedi_cmd *qedi_cmd;
1113         u32 iscsi_cid;
1114         int rc = 0;
1115
1116         iscsi_cid  = cqe->cqe_common.conn_id;
1117         q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
1118         if (!q_conn) {
1119                 QEDI_WARN(&qedi->dbg_ctx,
1120                           "Session no longer exists for cid=0x%x!!\n",
1121                           iscsi_cid);
1122                 return -1;
1123         }
1124         conn = q_conn->cls_conn->dd_data;
1125
1126         switch (cqe->cqe_common.cqe_type) {
1127         case ISCSI_CQE_TYPE_SOLICITED:
1128         case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
1129                 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
1130                 if (!qedi_cmd) {
1131                         rc = -1;
1132                         break;
1133                 }
1134                 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
1135                 qedi_cmd->cqe_work.qedi = qedi;
1136                 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
1137                 qedi_cmd->cqe_work.que_idx = que_idx;
1138                 qedi_cmd->cqe_work.is_solicited = true;
1139                 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
1140                 break;
1141         case ISCSI_CQE_TYPE_UNSOLICITED:
1142         case ISCSI_CQE_TYPE_DUMMY:
1143         case ISCSI_CQE_TYPE_TASK_CLEANUP:
1144                 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
1145                 if (!qedi_work) {
1146                         rc = -1;
1147                         break;
1148                 }
1149                 INIT_LIST_HEAD(&qedi_work->list);
1150                 qedi_work->qedi = qedi;
1151                 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
1152                 qedi_work->que_idx = que_idx;
1153                 qedi_work->is_solicited = false;
1154                 list_add_tail(&qedi_work->list, &p->work_list);
1155                 break;
1156         default:
1157                 rc = -1;
1158                 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
1159         }
1160         return rc;
1161 }
1162
1163 static bool qedi_process_completions(struct qedi_fastpath *fp)
1164 {
1165         struct qedi_ctx *qedi = fp->qedi;
1166         struct qed_sb_info *sb_info = fp->sb_info;
1167         struct status_block_e4 *sb = sb_info->sb_virt;
1168         struct qedi_percpu_s *p = NULL;
1169         struct global_queue *que;
1170         u16 prod_idx;
1171         unsigned long flags;
1172         union iscsi_cqe *cqe;
1173         int cpu;
1174         int ret;
1175
1176         /* Get the current firmware producer index */
1177         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1178
1179         if (prod_idx >= QEDI_CQ_SIZE)
1180                 prod_idx = prod_idx % QEDI_CQ_SIZE;
1181
1182         que = qedi->global_queues[fp->sb_id];
1183         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1184                   "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
1185                   que, prod_idx, que->cq_cons_idx, fp->sb_id);
1186
1187         qedi->intr_cpu = fp->sb_id;
1188         cpu = smp_processor_id();
1189         p = &per_cpu(qedi_percpu, cpu);
1190
1191         if (unlikely(!p->iothread))
1192                 WARN_ON(1);
1193
1194         spin_lock_irqsave(&p->p_work_lock, flags);
1195         while (que->cq_cons_idx != prod_idx) {
1196                 cqe = &que->cq[que->cq_cons_idx];
1197
1198                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1199                           "cqe=%p prod_idx=%d cons_idx=%d.\n",
1200                           cqe, prod_idx, que->cq_cons_idx);
1201
1202                 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
1203                 if (ret)
1204                         QEDI_WARN(&qedi->dbg_ctx,
1205                                   "Dropping CQE 0x%x for cid=0x%x.\n",
1206                                   que->cq_cons_idx, cqe->cqe_common.conn_id);
1207
1208                 que->cq_cons_idx++;
1209                 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1210                         que->cq_cons_idx = 0;
1211         }
1212         wake_up_process(p->iothread);
1213         spin_unlock_irqrestore(&p->p_work_lock, flags);
1214
1215         return true;
1216 }
1217
1218 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1219 {
1220         struct qedi_ctx *qedi = fp->qedi;
1221         struct global_queue *que;
1222         struct qed_sb_info *sb_info = fp->sb_info;
1223         struct status_block_e4 *sb = sb_info->sb_virt;
1224         u16 prod_idx;
1225
1226         barrier();
1227
1228         /* Get the current firmware producer index */
1229         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1230
1231         /* Get the pointer to the global CQ this completion is on */
1232         que = qedi->global_queues[fp->sb_id];
1233
1234         /* prod idx wrap around uint16 */
1235         if (prod_idx >= QEDI_CQ_SIZE)
1236                 prod_idx = prod_idx % QEDI_CQ_SIZE;
1237
1238         return (que->cq_cons_idx != prod_idx);
1239 }
1240
1241 /* MSI-X fastpath handler code */
1242 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1243 {
1244         struct qedi_fastpath *fp = dev_id;
1245         struct qedi_ctx *qedi = fp->qedi;
1246         bool wake_io_thread = true;
1247
1248         qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1249
1250 process_again:
1251         wake_io_thread = qedi_process_completions(fp);
1252         if (wake_io_thread) {
1253                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1254                           "process already running\n");
1255         }
1256
1257         if (qedi_fp_has_work(fp) == 0)
1258                 qed_sb_update_sb_idx(fp->sb_info);
1259
1260         /* Check for more work */
1261         rmb();
1262
1263         if (qedi_fp_has_work(fp) == 0)
1264                 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1265         else
1266                 goto process_again;
1267
1268         return IRQ_HANDLED;
1269 }
1270
1271 /* simd handler for MSI/INTa */
1272 static void qedi_simd_int_handler(void *cookie)
1273 {
1274         /* Cookie is qedi_ctx struct */
1275         struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1276
1277         QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1278 }
1279
1280 #define QEDI_SIMD_HANDLER_NUM           0
1281 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1282 {
1283         int i;
1284
1285         if (qedi->int_info.msix_cnt) {
1286                 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1287                         synchronize_irq(qedi->int_info.msix[i].vector);
1288                         irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1289                                               NULL);
1290                         free_irq(qedi->int_info.msix[i].vector,
1291                                  &qedi->fp_array[i]);
1292                 }
1293         } else {
1294                 qedi_ops->common->simd_handler_clean(qedi->cdev,
1295                                                      QEDI_SIMD_HANDLER_NUM);
1296         }
1297
1298         qedi->int_info.used_cnt = 0;
1299         qedi_ops->common->set_fp_int(qedi->cdev, 0);
1300 }
1301
1302 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1303 {
1304         int i, rc, cpu;
1305
1306         cpu = cpumask_first(cpu_online_mask);
1307         for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
1308                 rc = request_irq(qedi->int_info.msix[i].vector,
1309                                  qedi_msix_handler, 0, "qedi",
1310                                  &qedi->fp_array[i]);
1311
1312                 if (rc) {
1313                         QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1314                         qedi_sync_free_irqs(qedi);
1315                         return rc;
1316                 }
1317                 qedi->int_info.used_cnt++;
1318                 rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1319                                            get_cpu_mask(cpu));
1320                 cpu = cpumask_next(cpu, cpu_online_mask);
1321         }
1322
1323         return 0;
1324 }
1325
1326 static int qedi_setup_int(struct qedi_ctx *qedi)
1327 {
1328         int rc = 0;
1329
1330         rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1331         rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1332         if (rc)
1333                 goto exit_setup_int;
1334
1335         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1336                   "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1337                    qedi->int_info.msix_cnt, num_online_cpus());
1338
1339         if (qedi->int_info.msix_cnt) {
1340                 rc = qedi_request_msix_irq(qedi);
1341                 goto exit_setup_int;
1342         } else {
1343                 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1344                                                       QEDI_SIMD_HANDLER_NUM,
1345                                                       qedi_simd_int_handler);
1346                 qedi->int_info.used_cnt = 1;
1347         }
1348
1349 exit_setup_int:
1350         return rc;
1351 }
1352
1353 static void qedi_free_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1354 {
1355         if (qedi->iscsi_image)
1356                 dma_free_coherent(&qedi->pdev->dev,
1357                                   sizeof(struct qedi_nvm_iscsi_image),
1358                                   qedi->iscsi_image, qedi->nvm_buf_dma);
1359 }
1360
1361 static int qedi_alloc_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1362 {
1363         struct qedi_nvm_iscsi_image nvm_image;
1364
1365         qedi->iscsi_image = dma_zalloc_coherent(&qedi->pdev->dev,
1366                                                 sizeof(nvm_image),
1367                                                 &qedi->nvm_buf_dma,
1368                                                 GFP_KERNEL);
1369         if (!qedi->iscsi_image) {
1370                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate NVM BUF.\n");
1371                 return -ENOMEM;
1372         }
1373         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1374                   "NVM BUF addr=0x%p dma=0x%llx.\n", qedi->iscsi_image,
1375                   qedi->nvm_buf_dma);
1376
1377         return 0;
1378 }
1379
1380 static void qedi_free_bdq(struct qedi_ctx *qedi)
1381 {
1382         int i;
1383
1384         if (qedi->bdq_pbl_list)
1385                 dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
1386                                   qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1387
1388         if (qedi->bdq_pbl)
1389                 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1390                                   qedi->bdq_pbl, qedi->bdq_pbl_dma);
1391
1392         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1393                 if (qedi->bdq[i].buf_addr) {
1394                         dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1395                                           qedi->bdq[i].buf_addr,
1396                                           qedi->bdq[i].buf_dma);
1397                 }
1398         }
1399 }
1400
1401 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1402 {
1403         int i;
1404         struct global_queue **gl = qedi->global_queues;
1405
1406         for (i = 0; i < qedi->num_queues; i++) {
1407                 if (!gl[i])
1408                         continue;
1409
1410                 if (gl[i]->cq)
1411                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1412                                           gl[i]->cq, gl[i]->cq_dma);
1413                 if (gl[i]->cq_pbl)
1414                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1415                                           gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1416
1417                 kfree(gl[i]);
1418         }
1419         qedi_free_bdq(qedi);
1420         qedi_free_nvm_iscsi_cfg(qedi);
1421 }
1422
1423 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1424 {
1425         int i;
1426         struct scsi_bd *pbl;
1427         u64 *list;
1428         dma_addr_t page;
1429
1430         /* Alloc dma memory for BDQ buffers */
1431         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1432                 qedi->bdq[i].buf_addr =
1433                                 dma_alloc_coherent(&qedi->pdev->dev,
1434                                                    QEDI_BDQ_BUF_SIZE,
1435                                                    &qedi->bdq[i].buf_dma,
1436                                                    GFP_KERNEL);
1437                 if (!qedi->bdq[i].buf_addr) {
1438                         QEDI_ERR(&qedi->dbg_ctx,
1439                                  "Could not allocate BDQ buffer %d.\n", i);
1440                         return -ENOMEM;
1441                 }
1442         }
1443
1444         /* Alloc dma memory for BDQ page buffer list */
1445         qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1446         qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
1447         qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1448
1449         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1450                   qedi->rq_num_entries);
1451
1452         qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1453                                            qedi->bdq_pbl_mem_size,
1454                                            &qedi->bdq_pbl_dma, GFP_KERNEL);
1455         if (!qedi->bdq_pbl) {
1456                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1457                 return -ENOMEM;
1458         }
1459
1460         /*
1461          * Populate BDQ PBL with physical and virtual address of individual
1462          * BDQ buffers
1463          */
1464         pbl = (struct scsi_bd  *)qedi->bdq_pbl;
1465         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1466                 pbl->address.hi =
1467                                 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1468                 pbl->address.lo =
1469                                 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1470                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1471                           "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1472                           pbl, pbl->address.hi, pbl->address.lo, i);
1473                 pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
1474                 pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
1475                 pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
1476                 pbl->opaque.iscsi_opaque.opaque = cpu_to_le16(i);
1477                 pbl++;
1478         }
1479
1480         /* Allocate list of PBL pages */
1481         qedi->bdq_pbl_list = dma_zalloc_coherent(&qedi->pdev->dev, PAGE_SIZE,
1482                                                  &qedi->bdq_pbl_list_dma,
1483                                                  GFP_KERNEL);
1484         if (!qedi->bdq_pbl_list) {
1485                 QEDI_ERR(&qedi->dbg_ctx,
1486                          "Could not allocate list of PBL pages.\n");
1487                 return -ENOMEM;
1488         }
1489
1490         /*
1491          * Now populate PBL list with pages that contain pointers to the
1492          * individual buffers.
1493          */
1494         qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
1495         list = (u64 *)qedi->bdq_pbl_list;
1496         page = qedi->bdq_pbl_list_dma;
1497         for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1498                 *list = qedi->bdq_pbl_dma;
1499                 list++;
1500                 page += PAGE_SIZE;
1501         }
1502
1503         return 0;
1504 }
1505
1506 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1507 {
1508         u32 *list;
1509         int i;
1510         int status;
1511         u32 *pbl;
1512         dma_addr_t page;
1513         int num_pages;
1514
1515         /*
1516          * Number of global queues (CQ / RQ). This should
1517          * be <= number of available MSIX vectors for the PF
1518          */
1519         if (!qedi->num_queues) {
1520                 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1521                 return -ENOMEM;
1522         }
1523
1524         /* Make sure we allocated the PBL that will contain the physical
1525          * addresses of our queues
1526          */
1527         if (!qedi->p_cpuq) {
1528                 status = -EINVAL;
1529                 goto mem_alloc_failure;
1530         }
1531
1532         qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1533                                        qedi->num_queues), GFP_KERNEL);
1534         if (!qedi->global_queues) {
1535                 QEDI_ERR(&qedi->dbg_ctx,
1536                          "Unable to allocate global queues array ptr memory\n");
1537                 return -ENOMEM;
1538         }
1539         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1540                   "qedi->global_queues=%p.\n", qedi->global_queues);
1541
1542         /* Allocate DMA coherent buffers for BDQ */
1543         status = qedi_alloc_bdq(qedi);
1544         if (status)
1545                 goto mem_alloc_failure;
1546
1547         /* Allocate DMA coherent buffers for NVM_ISCSI_CFG */
1548         status = qedi_alloc_nvm_iscsi_cfg(qedi);
1549         if (status)
1550                 goto mem_alloc_failure;
1551
1552         /* Allocate a CQ and an associated PBL for each MSI-X
1553          * vector.
1554          */
1555         for (i = 0; i < qedi->num_queues; i++) {
1556                 qedi->global_queues[i] =
1557                                         kzalloc(sizeof(*qedi->global_queues[0]),
1558                                                 GFP_KERNEL);
1559                 if (!qedi->global_queues[i]) {
1560                         QEDI_ERR(&qedi->dbg_ctx,
1561                                  "Unable to allocation global queue %d.\n", i);
1562                         status = -ENOMEM;
1563                         goto mem_alloc_failure;
1564                 }
1565
1566                 qedi->global_queues[i]->cq_mem_size =
1567                     (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1568                 qedi->global_queues[i]->cq_mem_size =
1569                     (qedi->global_queues[i]->cq_mem_size +
1570                     (QEDI_PAGE_SIZE - 1));
1571
1572                 qedi->global_queues[i]->cq_pbl_size =
1573                     (qedi->global_queues[i]->cq_mem_size /
1574                     QEDI_PAGE_SIZE) * sizeof(void *);
1575                 qedi->global_queues[i]->cq_pbl_size =
1576                     (qedi->global_queues[i]->cq_pbl_size +
1577                     (QEDI_PAGE_SIZE - 1));
1578
1579                 qedi->global_queues[i]->cq = dma_zalloc_coherent(&qedi->pdev->dev,
1580                                                                  qedi->global_queues[i]->cq_mem_size,
1581                                                                  &qedi->global_queues[i]->cq_dma,
1582                                                                  GFP_KERNEL);
1583
1584                 if (!qedi->global_queues[i]->cq) {
1585                         QEDI_WARN(&qedi->dbg_ctx,
1586                                   "Could not allocate cq.\n");
1587                         status = -ENOMEM;
1588                         goto mem_alloc_failure;
1589                 }
1590                 qedi->global_queues[i]->cq_pbl = dma_zalloc_coherent(&qedi->pdev->dev,
1591                                                                      qedi->global_queues[i]->cq_pbl_size,
1592                                                                      &qedi->global_queues[i]->cq_pbl_dma,
1593                                                                      GFP_KERNEL);
1594
1595                 if (!qedi->global_queues[i]->cq_pbl) {
1596                         QEDI_WARN(&qedi->dbg_ctx,
1597                                   "Could not allocate cq PBL.\n");
1598                         status = -ENOMEM;
1599                         goto mem_alloc_failure;
1600                 }
1601
1602                 /* Create PBL */
1603                 num_pages = qedi->global_queues[i]->cq_mem_size /
1604                     QEDI_PAGE_SIZE;
1605                 page = qedi->global_queues[i]->cq_dma;
1606                 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1607
1608                 while (num_pages--) {
1609                         *pbl = (u32)page;
1610                         pbl++;
1611                         *pbl = (u32)((u64)page >> 32);
1612                         pbl++;
1613                         page += QEDI_PAGE_SIZE;
1614                 }
1615         }
1616
1617         list = (u32 *)qedi->p_cpuq;
1618
1619         /*
1620          * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1621          * CQ#1 PBL pointer, RQ#1 PBL pointer, etc.  Each PBL pointer points
1622          * to the physical address which contains an array of pointers to the
1623          * physical addresses of the specific queue pages.
1624          */
1625         for (i = 0; i < qedi->num_queues; i++) {
1626                 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1627                 list++;
1628                 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1629                 list++;
1630
1631                 *list = (u32)0;
1632                 list++;
1633                 *list = (u32)((u64)0 >> 32);
1634                 list++;
1635         }
1636
1637         return 0;
1638
1639 mem_alloc_failure:
1640         qedi_free_global_queues(qedi);
1641         return status;
1642 }
1643
1644 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1645 {
1646         int rval = 0;
1647         u32 *pbl;
1648         dma_addr_t page;
1649         int num_pages;
1650
1651         if (!ep)
1652                 return -EIO;
1653
1654         /* Calculate appropriate queue and PBL sizes */
1655         ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1656         ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1657
1658         ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1659         ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1660
1661         ep->sq = dma_zalloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1662                                      &ep->sq_dma, GFP_KERNEL);
1663         if (!ep->sq) {
1664                 QEDI_WARN(&qedi->dbg_ctx,
1665                           "Could not allocate send queue.\n");
1666                 rval = -ENOMEM;
1667                 goto out;
1668         }
1669         ep->sq_pbl = dma_zalloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1670                                          &ep->sq_pbl_dma, GFP_KERNEL);
1671         if (!ep->sq_pbl) {
1672                 QEDI_WARN(&qedi->dbg_ctx,
1673                           "Could not allocate send queue PBL.\n");
1674                 rval = -ENOMEM;
1675                 goto out_free_sq;
1676         }
1677
1678         /* Create PBL */
1679         num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1680         page = ep->sq_dma;
1681         pbl = (u32 *)ep->sq_pbl;
1682
1683         while (num_pages--) {
1684                 *pbl = (u32)page;
1685                 pbl++;
1686                 *pbl = (u32)((u64)page >> 32);
1687                 pbl++;
1688                 page += QEDI_PAGE_SIZE;
1689         }
1690
1691         return rval;
1692
1693 out_free_sq:
1694         dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1695                           ep->sq_dma);
1696 out:
1697         return rval;
1698 }
1699
1700 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1701 {
1702         if (ep->sq_pbl)
1703                 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1704                                   ep->sq_pbl_dma);
1705         if (ep->sq)
1706                 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1707                                   ep->sq_dma);
1708 }
1709
1710 int qedi_get_task_idx(struct qedi_ctx *qedi)
1711 {
1712         s16 tmp_idx;
1713
1714 again:
1715         tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1716                                       MAX_ISCSI_TASK_ENTRIES);
1717
1718         if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1719                 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1720                 tmp_idx = -1;
1721                 goto err_idx;
1722         }
1723
1724         if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1725                 goto again;
1726
1727 err_idx:
1728         return tmp_idx;
1729 }
1730
1731 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1732 {
1733         if (!test_and_clear_bit(idx, qedi->task_idx_map))
1734                 QEDI_ERR(&qedi->dbg_ctx,
1735                          "FW task context, already cleared, tid=0x%x\n", idx);
1736 }
1737
1738 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1739                          struct qedi_cmd *cmd)
1740 {
1741         qedi->itt_map[tid].itt = proto_itt;
1742         qedi->itt_map[tid].p_cmd = cmd;
1743
1744         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1745                   "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1746                   qedi->itt_map[tid].itt);
1747 }
1748
1749 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1750 {
1751         u16 i;
1752
1753         for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1754                 if (qedi->itt_map[i].itt == itt) {
1755                         *tid = i;
1756                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1757                                   "Ref itt=0x%x, found at tid=0x%x\n",
1758                                   itt, *tid);
1759                         return;
1760                 }
1761         }
1762
1763         WARN_ON(1);
1764 }
1765
1766 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1767 {
1768         *proto_itt = qedi->itt_map[tid].itt;
1769         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1770                   "Get itt map tid [0x%x with proto itt[0x%x]",
1771                   tid, *proto_itt);
1772 }
1773
1774 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1775 {
1776         struct qedi_cmd *cmd = NULL;
1777
1778         if (tid >= MAX_ISCSI_TASK_ENTRIES)
1779                 return NULL;
1780
1781         cmd = qedi->itt_map[tid].p_cmd;
1782         if (cmd->task_id != tid)
1783                 return NULL;
1784
1785         qedi->itt_map[tid].p_cmd = NULL;
1786
1787         return cmd;
1788 }
1789
1790 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1791 {
1792         qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1793                                 sizeof(struct qedi_itt_map), GFP_KERNEL);
1794         if (!qedi->itt_map) {
1795                 QEDI_ERR(&qedi->dbg_ctx,
1796                          "Unable to allocate itt map array memory\n");
1797                 return -ENOMEM;
1798         }
1799         return 0;
1800 }
1801
1802 static void qedi_free_itt(struct qedi_ctx *qedi)
1803 {
1804         kfree(qedi->itt_map);
1805 }
1806
1807 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1808         .rx_cb = qedi_ll2_rx,
1809         .tx_cb = NULL,
1810 };
1811
1812 static int qedi_percpu_io_thread(void *arg)
1813 {
1814         struct qedi_percpu_s *p = arg;
1815         struct qedi_work *work, *tmp;
1816         unsigned long flags;
1817         LIST_HEAD(work_list);
1818
1819         set_user_nice(current, -20);
1820
1821         while (!kthread_should_stop()) {
1822                 spin_lock_irqsave(&p->p_work_lock, flags);
1823                 while (!list_empty(&p->work_list)) {
1824                         list_splice_init(&p->work_list, &work_list);
1825                         spin_unlock_irqrestore(&p->p_work_lock, flags);
1826
1827                         list_for_each_entry_safe(work, tmp, &work_list, list) {
1828                                 list_del_init(&work->list);
1829                                 qedi_fp_process_cqes(work);
1830                                 if (!work->is_solicited)
1831                                         kfree(work);
1832                         }
1833                         cond_resched();
1834                         spin_lock_irqsave(&p->p_work_lock, flags);
1835                 }
1836                 set_current_state(TASK_INTERRUPTIBLE);
1837                 spin_unlock_irqrestore(&p->p_work_lock, flags);
1838                 schedule();
1839         }
1840         __set_current_state(TASK_RUNNING);
1841
1842         return 0;
1843 }
1844
1845 static int qedi_cpu_online(unsigned int cpu)
1846 {
1847         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1848         struct task_struct *thread;
1849
1850         thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1851                                         cpu_to_node(cpu),
1852                                         "qedi_thread/%d", cpu);
1853         if (IS_ERR(thread))
1854                 return PTR_ERR(thread);
1855
1856         kthread_bind(thread, cpu);
1857         p->iothread = thread;
1858         wake_up_process(thread);
1859         return 0;
1860 }
1861
1862 static int qedi_cpu_offline(unsigned int cpu)
1863 {
1864         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1865         struct qedi_work *work, *tmp;
1866         struct task_struct *thread;
1867
1868         spin_lock_bh(&p->p_work_lock);
1869         thread = p->iothread;
1870         p->iothread = NULL;
1871
1872         list_for_each_entry_safe(work, tmp, &p->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
1879         spin_unlock_bh(&p->p_work_lock);
1880         if (thread)
1881                 kthread_stop(thread);
1882         return 0;
1883 }
1884
1885 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1886 {
1887         struct qed_ll2_params params;
1888
1889         qedi_recover_all_conns(qedi);
1890
1891         qedi_ops->ll2->stop(qedi->cdev);
1892         qedi_ll2_free_skbs(qedi);
1893
1894         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1895                   qedi->ll2_mtu, mtu);
1896         memset(&params, 0, sizeof(params));
1897         qedi->ll2_mtu = mtu;
1898         params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1899         params.drop_ttl0_packets = 0;
1900         params.rx_vlan_stripping = 1;
1901         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1902         qedi_ops->ll2->start(qedi->cdev, &params);
1903 }
1904
1905 /**
1906  * qedi_get_nvram_block: - Scan through the iSCSI NVRAM block (while accounting
1907  * for gaps) for the matching absolute-pf-id of the QEDI device.
1908  */
1909 static struct nvm_iscsi_block *
1910 qedi_get_nvram_block(struct qedi_ctx *qedi)
1911 {
1912         int i;
1913         u8 pf;
1914         u32 flags;
1915         struct nvm_iscsi_block *block;
1916
1917         pf = qedi->dev_info.common.abs_pf_id;
1918         block = &qedi->iscsi_image->iscsi_cfg.block[0];
1919         for (i = 0; i < NUM_OF_ISCSI_PF_SUPPORTED; i++, block++) {
1920                 flags = ((block->id) & NVM_ISCSI_CFG_BLK_CTRL_FLAG_MASK) >>
1921                         NVM_ISCSI_CFG_BLK_CTRL_FLAG_OFFSET;
1922                 if (flags & (NVM_ISCSI_CFG_BLK_CTRL_FLAG_IS_NOT_EMPTY |
1923                                 NVM_ISCSI_CFG_BLK_CTRL_FLAG_PF_MAPPED) &&
1924                         (pf == (block->id & NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_MASK)
1925                                 >> NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_OFFSET))
1926                         return block;
1927         }
1928         return NULL;
1929 }
1930
1931 static ssize_t qedi_show_boot_eth_info(void *data, int type, char *buf)
1932 {
1933         struct qedi_ctx *qedi = data;
1934         struct nvm_iscsi_initiator *initiator;
1935         int rc = 1;
1936         u32 ipv6_en, dhcp_en, ip_len;
1937         struct nvm_iscsi_block *block;
1938         char *fmt, *ip, *sub, *gw;
1939
1940         block = qedi_get_nvram_block(qedi);
1941         if (!block)
1942                 return 0;
1943
1944         initiator = &block->initiator;
1945         ipv6_en = block->generic.ctrl_flags &
1946                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
1947         dhcp_en = block->generic.ctrl_flags &
1948                   NVM_ISCSI_CFG_GEN_DHCP_TCPIP_CONFIG_ENABLED;
1949         /* Static IP assignments. */
1950         fmt = ipv6_en ? "%pI6\n" : "%pI4\n";
1951         ip = ipv6_en ? initiator->ipv6.addr.byte : initiator->ipv4.addr.byte;
1952         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
1953         sub = ipv6_en ? initiator->ipv6.subnet_mask.byte :
1954               initiator->ipv4.subnet_mask.byte;
1955         gw = ipv6_en ? initiator->ipv6.gateway.byte :
1956              initiator->ipv4.gateway.byte;
1957         /* DHCP IP adjustments. */
1958         fmt = dhcp_en ? "%s\n" : fmt;
1959         if (dhcp_en) {
1960                 ip = ipv6_en ? "0::0" : "0.0.0.0";
1961                 sub = ip;
1962                 gw = ip;
1963                 ip_len = ipv6_en ? 5 : 8;
1964         }
1965
1966         switch (type) {
1967         case ISCSI_BOOT_ETH_IP_ADDR:
1968                 rc = snprintf(buf, ip_len, fmt, ip);
1969                 break;
1970         case ISCSI_BOOT_ETH_SUBNET_MASK:
1971                 rc = snprintf(buf, ip_len, fmt, sub);
1972                 break;
1973         case ISCSI_BOOT_ETH_GATEWAY:
1974                 rc = snprintf(buf, ip_len, fmt, gw);
1975                 break;
1976         case ISCSI_BOOT_ETH_FLAGS:
1977                 rc = snprintf(buf, 3, "%hhd\n",
1978                               SYSFS_FLAG_FW_SEL_BOOT);
1979                 break;
1980         case ISCSI_BOOT_ETH_INDEX:
1981                 rc = snprintf(buf, 3, "0\n");
1982                 break;
1983         case ISCSI_BOOT_ETH_MAC:
1984                 rc = sysfs_format_mac(buf, qedi->mac, ETH_ALEN);
1985                 break;
1986         case ISCSI_BOOT_ETH_VLAN:
1987                 rc = snprintf(buf, 12, "%d\n",
1988                               GET_FIELD2(initiator->generic_cont0,
1989                                          NVM_ISCSI_CFG_INITIATOR_VLAN));
1990                 break;
1991         case ISCSI_BOOT_ETH_ORIGIN:
1992                 if (dhcp_en)
1993                         rc = snprintf(buf, 3, "3\n");
1994                 break;
1995         default:
1996                 rc = 0;
1997                 break;
1998         }
1999
2000         return rc;
2001 }
2002
2003 static umode_t qedi_eth_get_attr_visibility(void *data, int type)
2004 {
2005         int rc = 1;
2006
2007         switch (type) {
2008         case ISCSI_BOOT_ETH_FLAGS:
2009         case ISCSI_BOOT_ETH_MAC:
2010         case ISCSI_BOOT_ETH_INDEX:
2011         case ISCSI_BOOT_ETH_IP_ADDR:
2012         case ISCSI_BOOT_ETH_SUBNET_MASK:
2013         case ISCSI_BOOT_ETH_GATEWAY:
2014         case ISCSI_BOOT_ETH_ORIGIN:
2015         case ISCSI_BOOT_ETH_VLAN:
2016                 rc = 0444;
2017                 break;
2018         default:
2019                 rc = 0;
2020                 break;
2021         }
2022         return rc;
2023 }
2024
2025 static ssize_t qedi_show_boot_ini_info(void *data, int type, char *buf)
2026 {
2027         struct qedi_ctx *qedi = data;
2028         struct nvm_iscsi_initiator *initiator;
2029         int rc;
2030         struct nvm_iscsi_block *block;
2031
2032         block = qedi_get_nvram_block(qedi);
2033         if (!block)
2034                 return 0;
2035
2036         initiator = &block->initiator;
2037
2038         switch (type) {
2039         case ISCSI_BOOT_INI_INITIATOR_NAME:
2040                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2041                              initiator->initiator_name.byte);
2042                 break;
2043         default:
2044                 rc = 0;
2045                 break;
2046         }
2047         return rc;
2048 }
2049
2050 static umode_t qedi_ini_get_attr_visibility(void *data, int type)
2051 {
2052         int rc;
2053
2054         switch (type) {
2055         case ISCSI_BOOT_INI_INITIATOR_NAME:
2056                 rc = 0444;
2057                 break;
2058         default:
2059                 rc = 0;
2060                 break;
2061         }
2062         return rc;
2063 }
2064
2065 static ssize_t
2066 qedi_show_boot_tgt_info(struct qedi_ctx *qedi, int type,
2067                         char *buf, enum qedi_nvm_tgts idx)
2068 {
2069         int rc = 1;
2070         u32 ctrl_flags, ipv6_en, chap_en, mchap_en, ip_len;
2071         struct nvm_iscsi_block *block;
2072         char *chap_name, *chap_secret;
2073         char *mchap_name, *mchap_secret;
2074
2075         block = qedi_get_nvram_block(qedi);
2076         if (!block)
2077                 goto exit_show_tgt_info;
2078
2079         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2080                   "Port:%d, tgt_idx:%d\n",
2081                   GET_FIELD2(block->id, NVM_ISCSI_CFG_BLK_MAPPED_PF_ID), idx);
2082
2083         ctrl_flags = block->target[idx].ctrl_flags &
2084                      NVM_ISCSI_CFG_TARGET_ENABLED;
2085
2086         if (!ctrl_flags) {
2087                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2088                           "Target disabled\n");
2089                 goto exit_show_tgt_info;
2090         }
2091
2092         ipv6_en = block->generic.ctrl_flags &
2093                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
2094         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
2095         chap_en = block->generic.ctrl_flags &
2096                   NVM_ISCSI_CFG_GEN_CHAP_ENABLED;
2097         chap_name = chap_en ? block->initiator.chap_name.byte : NULL;
2098         chap_secret = chap_en ? block->initiator.chap_password.byte : NULL;
2099
2100         mchap_en = block->generic.ctrl_flags &
2101                   NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED;
2102         mchap_name = mchap_en ? block->target[idx].chap_name.byte : NULL;
2103         mchap_secret = mchap_en ? block->target[idx].chap_password.byte : NULL;
2104
2105         switch (type) {
2106         case ISCSI_BOOT_TGT_NAME:
2107                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2108                              block->target[idx].target_name.byte);
2109                 break;
2110         case ISCSI_BOOT_TGT_IP_ADDR:
2111                 if (ipv6_en)
2112                         rc = snprintf(buf, ip_len, "%pI6\n",
2113                                       block->target[idx].ipv6_addr.byte);
2114                 else
2115                         rc = snprintf(buf, ip_len, "%pI4\n",
2116                                       block->target[idx].ipv4_addr.byte);
2117                 break;
2118         case ISCSI_BOOT_TGT_PORT:
2119                 rc = snprintf(buf, 12, "%d\n",
2120                               GET_FIELD2(block->target[idx].generic_cont0,
2121                                          NVM_ISCSI_CFG_TARGET_TCP_PORT));
2122                 break;
2123         case ISCSI_BOOT_TGT_LUN:
2124                 rc = snprintf(buf, 22, "%.*d\n",
2125                               block->target[idx].lun.value[1],
2126                               block->target[idx].lun.value[0]);
2127                 break;
2128         case ISCSI_BOOT_TGT_CHAP_NAME:
2129                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2130                              chap_name);
2131                 break;
2132         case ISCSI_BOOT_TGT_CHAP_SECRET:
2133                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_PWD_MAX_LEN,
2134                              chap_secret);
2135                 break;
2136         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2137                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2138                              mchap_name);
2139                 break;
2140         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2141                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_PWD_MAX_LEN,
2142                              mchap_secret);
2143                 break;
2144         case ISCSI_BOOT_TGT_FLAGS:
2145                 rc = snprintf(buf, 3, "%hhd\n", SYSFS_FLAG_FW_SEL_BOOT);
2146                 break;
2147         case ISCSI_BOOT_TGT_NIC_ASSOC:
2148                 rc = snprintf(buf, 3, "0\n");
2149                 break;
2150         default:
2151                 rc = 0;
2152                 break;
2153         }
2154
2155 exit_show_tgt_info:
2156         return rc;
2157 }
2158
2159 static ssize_t qedi_show_boot_tgt_pri_info(void *data, int type, char *buf)
2160 {
2161         struct qedi_ctx *qedi = data;
2162
2163         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_PRI);
2164 }
2165
2166 static ssize_t qedi_show_boot_tgt_sec_info(void *data, int type, char *buf)
2167 {
2168         struct qedi_ctx *qedi = data;
2169
2170         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_SEC);
2171 }
2172
2173 static umode_t qedi_tgt_get_attr_visibility(void *data, int type)
2174 {
2175         int rc;
2176
2177         switch (type) {
2178         case ISCSI_BOOT_TGT_NAME:
2179         case ISCSI_BOOT_TGT_IP_ADDR:
2180         case ISCSI_BOOT_TGT_PORT:
2181         case ISCSI_BOOT_TGT_LUN:
2182         case ISCSI_BOOT_TGT_CHAP_NAME:
2183         case ISCSI_BOOT_TGT_CHAP_SECRET:
2184         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2185         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2186         case ISCSI_BOOT_TGT_NIC_ASSOC:
2187         case ISCSI_BOOT_TGT_FLAGS:
2188                 rc = 0444;
2189                 break;
2190         default:
2191                 rc = 0;
2192                 break;
2193         }
2194         return rc;
2195 }
2196
2197 static void qedi_boot_release(void *data)
2198 {
2199         struct qedi_ctx *qedi = data;
2200
2201         scsi_host_put(qedi->shost);
2202 }
2203
2204 static int qedi_get_boot_info(struct qedi_ctx *qedi)
2205 {
2206         int ret = 1;
2207         struct qedi_nvm_iscsi_image nvm_image;
2208
2209         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2210                   "Get NVM iSCSI CFG image\n");
2211         ret = qedi_ops->common->nvm_get_image(qedi->cdev,
2212                                               QED_NVM_IMAGE_ISCSI_CFG,
2213                                               (char *)qedi->iscsi_image,
2214                                               sizeof(nvm_image));
2215         if (ret)
2216                 QEDI_ERR(&qedi->dbg_ctx,
2217                          "Could not get NVM image. ret = %d\n", ret);
2218
2219         return ret;
2220 }
2221
2222 static int qedi_setup_boot_info(struct qedi_ctx *qedi)
2223 {
2224         struct iscsi_boot_kobj *boot_kobj;
2225
2226         if (qedi_get_boot_info(qedi))
2227                 return -EPERM;
2228
2229         qedi->boot_kset = iscsi_boot_create_host_kset(qedi->shost->host_no);
2230         if (!qedi->boot_kset)
2231                 goto kset_free;
2232
2233         if (!scsi_host_get(qedi->shost))
2234                 goto kset_free;
2235
2236         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 0, qedi,
2237                                              qedi_show_boot_tgt_pri_info,
2238                                              qedi_tgt_get_attr_visibility,
2239                                              qedi_boot_release);
2240         if (!boot_kobj)
2241                 goto put_host;
2242
2243         if (!scsi_host_get(qedi->shost))
2244                 goto kset_free;
2245
2246         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 1, qedi,
2247                                              qedi_show_boot_tgt_sec_info,
2248                                              qedi_tgt_get_attr_visibility,
2249                                              qedi_boot_release);
2250         if (!boot_kobj)
2251                 goto put_host;
2252
2253         if (!scsi_host_get(qedi->shost))
2254                 goto kset_free;
2255
2256         boot_kobj = iscsi_boot_create_initiator(qedi->boot_kset, 0, qedi,
2257                                                 qedi_show_boot_ini_info,
2258                                                 qedi_ini_get_attr_visibility,
2259                                                 qedi_boot_release);
2260         if (!boot_kobj)
2261                 goto put_host;
2262
2263         if (!scsi_host_get(qedi->shost))
2264                 goto kset_free;
2265
2266         boot_kobj = iscsi_boot_create_ethernet(qedi->boot_kset, 0, qedi,
2267                                                qedi_show_boot_eth_info,
2268                                                qedi_eth_get_attr_visibility,
2269                                                qedi_boot_release);
2270         if (!boot_kobj)
2271                 goto put_host;
2272
2273         return 0;
2274
2275 put_host:
2276         scsi_host_put(qedi->shost);
2277 kset_free:
2278         iscsi_boot_destroy_kset(qedi->boot_kset);
2279         return -ENOMEM;
2280 }
2281
2282 static void __qedi_remove(struct pci_dev *pdev, int mode)
2283 {
2284         struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2285         int rval;
2286
2287         if (qedi->tmf_thread) {
2288                 flush_workqueue(qedi->tmf_thread);
2289                 destroy_workqueue(qedi->tmf_thread);
2290                 qedi->tmf_thread = NULL;
2291         }
2292
2293         if (qedi->offload_thread) {
2294                 flush_workqueue(qedi->offload_thread);
2295                 destroy_workqueue(qedi->offload_thread);
2296                 qedi->offload_thread = NULL;
2297         }
2298
2299 #ifdef CONFIG_DEBUG_FS
2300         qedi_dbg_host_exit(&qedi->dbg_ctx);
2301 #endif
2302         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
2303                 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2304
2305         qedi_sync_free_irqs(qedi);
2306
2307         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2308                 qedi_ops->stop(qedi->cdev);
2309                 qedi_ops->ll2->stop(qedi->cdev);
2310         }
2311
2312         if (mode == QEDI_MODE_NORMAL)
2313                 qedi_free_iscsi_pf_param(qedi);
2314
2315         rval = qedi_ops->common->update_drv_state(qedi->cdev, false);
2316         if (rval)
2317                 QEDI_ERR(&qedi->dbg_ctx, "Failed to send drv state to MFW\n");
2318
2319         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2320                 qedi_ops->common->slowpath_stop(qedi->cdev);
2321                 qedi_ops->common->remove(qedi->cdev);
2322         }
2323
2324         qedi_destroy_fp(qedi);
2325
2326         if (mode == QEDI_MODE_NORMAL) {
2327                 qedi_release_cid_que(qedi);
2328                 qedi_cm_free_mem(qedi);
2329                 qedi_free_uio(qedi->udev);
2330                 qedi_free_itt(qedi);
2331
2332                 iscsi_host_remove(qedi->shost);
2333                 iscsi_host_free(qedi->shost);
2334
2335                 if (qedi->ll2_recv_thread) {
2336                         kthread_stop(qedi->ll2_recv_thread);
2337                         qedi->ll2_recv_thread = NULL;
2338                 }
2339                 qedi_ll2_free_skbs(qedi);
2340
2341                 if (qedi->boot_kset)
2342                         iscsi_boot_destroy_kset(qedi->boot_kset);
2343         }
2344 }
2345
2346 static int __qedi_probe(struct pci_dev *pdev, int mode)
2347 {
2348         struct qedi_ctx *qedi;
2349         struct qed_ll2_params params;
2350         u32 dp_module = 0;
2351         u8 dp_level = 0;
2352         bool is_vf = false;
2353         char host_buf[16];
2354         struct qed_link_params link_params;
2355         struct qed_slowpath_params sp_params;
2356         struct qed_probe_params qed_params;
2357         void *task_start, *task_end;
2358         int rc;
2359         u16 tmp;
2360
2361         if (mode != QEDI_MODE_RECOVERY) {
2362                 qedi = qedi_host_alloc(pdev);
2363                 if (!qedi) {
2364                         rc = -ENOMEM;
2365                         goto exit_probe;
2366                 }
2367         } else {
2368                 qedi = pci_get_drvdata(pdev);
2369         }
2370
2371         memset(&qed_params, 0, sizeof(qed_params));
2372         qed_params.protocol = QED_PROTOCOL_ISCSI;
2373         qed_params.dp_module = dp_module;
2374         qed_params.dp_level = dp_level;
2375         qed_params.is_vf = is_vf;
2376         qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
2377         if (!qedi->cdev) {
2378                 rc = -ENODEV;
2379                 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
2380                 goto free_host;
2381         }
2382
2383         atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2384
2385         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2386         if (rc)
2387                 goto free_host;
2388
2389         if (mode != QEDI_MODE_RECOVERY) {
2390                 rc = qedi_set_iscsi_pf_param(qedi);
2391                 if (rc) {
2392                         rc = -ENOMEM;
2393                         QEDI_ERR(&qedi->dbg_ctx,
2394                                  "Set iSCSI pf param fail\n");
2395                         goto free_host;
2396                 }
2397         }
2398
2399         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2400
2401         rc = qedi_prepare_fp(qedi);
2402         if (rc) {
2403                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
2404                 goto free_pf_params;
2405         }
2406
2407         /* Start the Slowpath-process */
2408         memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
2409         sp_params.int_mode = QED_INT_MODE_MSIX;
2410         sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
2411         sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
2412         sp_params.drv_rev = QEDI_DRIVER_REV_VER;
2413         sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
2414         strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
2415         rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
2416         if (rc) {
2417                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
2418                 goto stop_hw;
2419         }
2420
2421         /* update_pf_params needs to be called before and after slowpath
2422          * start
2423          */
2424         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2425
2426         rc = qedi_setup_int(qedi);
2427         if (rc)
2428                 goto stop_iscsi_func;
2429
2430         qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2431
2432         /* Learn information crucial for qedi to progress */
2433         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2434         if (rc)
2435                 goto stop_iscsi_func;
2436
2437         /* Record BDQ producer doorbell addresses */
2438         qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
2439         qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
2440         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2441                   "BDQ primary_prod=%p secondary_prod=%p.\n",
2442                   qedi->bdq_primary_prod,
2443                   qedi->bdq_secondary_prod);
2444
2445         /*
2446          * We need to write the number of BDs in the BDQ we've preallocated so
2447          * the f/w will do a prefetch and we'll get an unsolicited CQE when a
2448          * packet arrives.
2449          */
2450         qedi->bdq_prod_idx = QEDI_BDQ_NUM;
2451         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2452                   "Writing %d to primary and secondary BDQ doorbell registers.\n",
2453                   qedi->bdq_prod_idx);
2454         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
2455         tmp = readw(qedi->bdq_primary_prod);
2456         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
2457         tmp = readw(qedi->bdq_secondary_prod);
2458
2459         ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
2460         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
2461                   qedi->mac);
2462
2463         sprintf(host_buf, "host_%d", qedi->shost->host_no);
2464         qedi_ops->common->set_name(qedi->cdev, host_buf);
2465
2466         qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
2467
2468         memset(&params, 0, sizeof(params));
2469         params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
2470         qedi->ll2_mtu = DEF_PATH_MTU;
2471         params.drop_ttl0_packets = 0;
2472         params.rx_vlan_stripping = 1;
2473         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
2474
2475         if (mode != QEDI_MODE_RECOVERY) {
2476                 /* set up rx path */
2477                 INIT_LIST_HEAD(&qedi->ll2_skb_list);
2478                 spin_lock_init(&qedi->ll2_lock);
2479                 /* start qedi context */
2480                 spin_lock_init(&qedi->hba_lock);
2481                 spin_lock_init(&qedi->task_idx_lock);
2482                 mutex_init(&qedi->stats_lock);
2483         }
2484         qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
2485         qedi_ops->ll2->start(qedi->cdev, &params);
2486
2487         if (mode != QEDI_MODE_RECOVERY) {
2488                 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
2489                                                     (void *)qedi,
2490                                                     "qedi_ll2_thread");
2491         }
2492
2493         rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
2494                              qedi, qedi_iscsi_event_cb);
2495         if (rc) {
2496                 rc = -ENODEV;
2497                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
2498                 goto stop_slowpath;
2499         }
2500
2501         task_start = qedi_get_task_mem(&qedi->tasks, 0);
2502         task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
2503         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2504                   "Task context start=%p, end=%p block_size=%u.\n",
2505                    task_start, task_end, qedi->tasks.size);
2506
2507         memset(&link_params, 0, sizeof(link_params));
2508         link_params.link_up = true;
2509         rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
2510         if (rc) {
2511                 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
2512                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2513         }
2514
2515 #ifdef CONFIG_DEBUG_FS
2516         qedi_dbg_host_init(&qedi->dbg_ctx, qedi_debugfs_ops,
2517                            qedi_dbg_fops);
2518 #endif
2519         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2520                   "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
2521                   QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
2522                   FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
2523
2524         if (mode == QEDI_MODE_NORMAL) {
2525                 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
2526                         QEDI_ERR(&qedi->dbg_ctx,
2527                                  "Could not add iscsi host\n");
2528                         rc = -ENOMEM;
2529                         goto remove_host;
2530                 }
2531
2532                 /* Allocate uio buffers */
2533                 rc = qedi_alloc_uio_rings(qedi);
2534                 if (rc) {
2535                         QEDI_ERR(&qedi->dbg_ctx,
2536                                  "UIO alloc ring failed err=%d\n", rc);
2537                         goto remove_host;
2538                 }
2539
2540                 rc = qedi_init_uio(qedi);
2541                 if (rc) {
2542                         QEDI_ERR(&qedi->dbg_ctx,
2543                                  "UIO init failed, err=%d\n", rc);
2544                         goto free_uio;
2545                 }
2546
2547                 /* host the array on iscsi_conn */
2548                 rc = qedi_setup_cid_que(qedi);
2549                 if (rc) {
2550                         QEDI_ERR(&qedi->dbg_ctx,
2551                                  "Could not setup cid que\n");
2552                         goto free_uio;
2553                 }
2554
2555                 rc = qedi_cm_alloc_mem(qedi);
2556                 if (rc) {
2557                         QEDI_ERR(&qedi->dbg_ctx,
2558                                  "Could not alloc cm memory\n");
2559                         goto free_cid_que;
2560                 }
2561
2562                 rc = qedi_alloc_itt(qedi);
2563                 if (rc) {
2564                         QEDI_ERR(&qedi->dbg_ctx,
2565                                  "Could not alloc itt memory\n");
2566                         goto free_cid_que;
2567                 }
2568
2569                 sprintf(host_buf, "host_%d", qedi->shost->host_no);
2570                 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
2571                 if (!qedi->tmf_thread) {
2572                         QEDI_ERR(&qedi->dbg_ctx,
2573                                  "Unable to start tmf thread!\n");
2574                         rc = -ENODEV;
2575                         goto free_cid_que;
2576                 }
2577
2578                 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
2579                 qedi->offload_thread = create_workqueue(host_buf);
2580                 if (!qedi->offload_thread) {
2581                         QEDI_ERR(&qedi->dbg_ctx,
2582                                  "Unable to start offload thread!\n");
2583                         rc = -ENODEV;
2584                         goto free_tmf_thread;
2585                 }
2586
2587                 /* F/w needs 1st task context memory entry for performance */
2588                 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
2589                 atomic_set(&qedi->num_offloads, 0);
2590
2591                 if (qedi_setup_boot_info(qedi))
2592                         QEDI_ERR(&qedi->dbg_ctx,
2593                                  "No iSCSI boot target configured\n");
2594
2595                 rc = qedi_ops->common->update_drv_state(qedi->cdev, true);
2596                 if (rc)
2597                         QEDI_ERR(&qedi->dbg_ctx,
2598                                  "Failed to send drv state to MFW\n");
2599
2600         }
2601
2602         return 0;
2603
2604 free_tmf_thread:
2605         destroy_workqueue(qedi->tmf_thread);
2606 free_cid_que:
2607         qedi_release_cid_que(qedi);
2608 free_uio:
2609         qedi_free_uio(qedi->udev);
2610 remove_host:
2611 #ifdef CONFIG_DEBUG_FS
2612         qedi_dbg_host_exit(&qedi->dbg_ctx);
2613 #endif
2614         iscsi_host_remove(qedi->shost);
2615 stop_iscsi_func:
2616         qedi_ops->stop(qedi->cdev);
2617 stop_slowpath:
2618         qedi_ops->common->slowpath_stop(qedi->cdev);
2619 stop_hw:
2620         qedi_ops->common->remove(qedi->cdev);
2621 free_pf_params:
2622         qedi_free_iscsi_pf_param(qedi);
2623 free_host:
2624         iscsi_host_free(qedi->shost);
2625 exit_probe:
2626         return rc;
2627 }
2628
2629 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2630 {
2631         return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2632 }
2633
2634 static void qedi_remove(struct pci_dev *pdev)
2635 {
2636         __qedi_remove(pdev, QEDI_MODE_NORMAL);
2637 }
2638
2639 static struct pci_device_id qedi_pci_tbl[] = {
2640         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2641         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
2642         { 0 },
2643 };
2644 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2645
2646 static enum cpuhp_state qedi_cpuhp_state;
2647
2648 static struct pci_driver qedi_pci_driver = {
2649         .name = QEDI_MODULE_NAME,
2650         .id_table = qedi_pci_tbl,
2651         .probe = qedi_probe,
2652         .remove = qedi_remove,
2653 };
2654
2655 static int __init qedi_init(void)
2656 {
2657         struct qedi_percpu_s *p;
2658         int cpu, rc = 0;
2659
2660         qedi_ops = qed_get_iscsi_ops();
2661         if (!qedi_ops) {
2662                 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2663                 return -EINVAL;
2664         }
2665
2666 #ifdef CONFIG_DEBUG_FS
2667         qedi_dbg_init("qedi");
2668 #endif
2669
2670         qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2671         if (!qedi_scsi_transport) {
2672                 QEDI_ERR(NULL, "Could not register qedi transport");
2673                 rc = -ENOMEM;
2674                 goto exit_qedi_init_1;
2675         }
2676
2677         for_each_possible_cpu(cpu) {
2678                 p = &per_cpu(qedi_percpu, cpu);
2679                 INIT_LIST_HEAD(&p->work_list);
2680                 spin_lock_init(&p->p_work_lock);
2681                 p->iothread = NULL;
2682         }
2683
2684         rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2685                                qedi_cpu_online, qedi_cpu_offline);
2686         if (rc < 0)
2687                 goto exit_qedi_init_2;
2688         qedi_cpuhp_state = rc;
2689
2690         rc = pci_register_driver(&qedi_pci_driver);
2691         if (rc) {
2692                 QEDI_ERR(NULL, "Failed to register driver\n");
2693                 goto exit_qedi_hp;
2694         }
2695
2696         return 0;
2697
2698 exit_qedi_hp:
2699         cpuhp_remove_state(qedi_cpuhp_state);
2700 exit_qedi_init_2:
2701         iscsi_unregister_transport(&qedi_iscsi_transport);
2702 exit_qedi_init_1:
2703 #ifdef CONFIG_DEBUG_FS
2704         qedi_dbg_exit();
2705 #endif
2706         qed_put_iscsi_ops();
2707         return rc;
2708 }
2709
2710 static void __exit qedi_cleanup(void)
2711 {
2712         pci_unregister_driver(&qedi_pci_driver);
2713         cpuhp_remove_state(qedi_cpuhp_state);
2714         iscsi_unregister_transport(&qedi_iscsi_transport);
2715
2716 #ifdef CONFIG_DEBUG_FS
2717         qedi_dbg_exit();
2718 #endif
2719         qed_put_iscsi_ops();
2720 }
2721
2722 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2723 MODULE_LICENSE("GPL");
2724 MODULE_AUTHOR("QLogic Corporation");
2725 MODULE_VERSION(QEDI_MODULE_VERSION);
2726 module_init(qedi_init);
2727 module_exit(qedi_cleanup);