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(DIV_ROUND_UP(size, 32), 4, 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;
 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 (pri_ctrl_flags) {
 956                         if (!strcmp(pri_tgt->iscsi_name, sess->targetname) &&
 957                             !strcmp(pri_tgt->ip_addr, ep_ip_addr)) {
 958                                 found = 1;
 959                                 break;
 960                         }
 961                 }
 962
 963                 if (sec_ctrl_flags) {
 964                         if (!strcmp(sec_tgt->iscsi_name, sess->targetname) &&
 965                             !strcmp(sec_tgt->ip_addr, ep_ip_addr)) {
 966                                 found = 1;
 967                                 break;
 968                         }
 969                 }
 970         }
 971
 972         if (found) {
 973                 if (conn->hdrdgst_en) {
 974                         iscsi->header_digest_set = true;
 975                         iscsi->header_digest = 1;
 976                 }
 977
 978                 if (conn->datadgst_en) {
 979                         iscsi->data_digest_set = true;
 980                         iscsi->data_digest = 1;
 981                 }
 982                 iscsi->boot_taget_portal_set = true;
 983                 iscsi->boot_taget_portal = sess->tpgt;
 984
 985         } else {
 986                 ret = -1;
 987         }
 988
 989         if (sec_ctrl_flags)
 990                 kfree(sec_tgt);
 991 free_tgt:
 992         if (pri_ctrl_flags)
 993                 kfree(pri_tgt);
 994
 995         return ret;
 996 }
 997
 998 static void qedi_get_generic_tlv_data(void *dev, struct qed_generic_tlvs *data)
 999 {
1000         struct qedi_ctx *qedi;
1001
1002         if (!dev) {
1003                 QEDI_INFO(NULL, QEDI_LOG_EVT,
1004                           "dev is NULL so ignoring get_generic_tlv_data request.\n");
1005                 return;
1006         }
1007         qedi = (struct qedi_ctx *)dev;
1008
1009         memset(data, 0, sizeof(struct qed_generic_tlvs));
1010         ether_addr_copy(data->mac[0], qedi->mac);
1011 }
1012
1013 /*
1014  * Protocol TLV handler
1015  */
1016 static void qedi_get_protocol_tlv_data(void *dev, void *data)
1017 {
1018         struct qed_mfw_tlv_iscsi *iscsi = data;
1019         struct qed_iscsi_stats *fw_iscsi_stats;
1020         struct nvm_iscsi_block *block = NULL;
1021         u32 chap_en = 0, mchap_en = 0;
1022         struct qedi_ctx *qedi = dev;
1023         int rval = 0;
1024
1025         fw_iscsi_stats = kmalloc(sizeof(*fw_iscsi_stats), GFP_KERNEL);
1026         if (!fw_iscsi_stats) {
1027                 QEDI_ERR(&qedi->dbg_ctx,
1028                          "Could not allocate memory for fw_iscsi_stats.\n");
1029                 goto exit_get_data;
1030         }
1031
1032         mutex_lock(&qedi->stats_lock);
1033         /* Query firmware for offload stats */
1034         qedi_ops->get_stats(qedi->cdev, fw_iscsi_stats);
1035         mutex_unlock(&qedi->stats_lock);
1036
1037         iscsi->rx_frames_set = true;
1038         iscsi->rx_frames = fw_iscsi_stats->iscsi_rx_packet_cnt;
1039         iscsi->rx_bytes_set = true;
1040         iscsi->rx_bytes = fw_iscsi_stats->iscsi_rx_bytes_cnt;
1041         iscsi->tx_frames_set = true;
1042         iscsi->tx_frames = fw_iscsi_stats->iscsi_tx_packet_cnt;
1043         iscsi->tx_bytes_set = true;
1044         iscsi->tx_bytes = fw_iscsi_stats->iscsi_tx_bytes_cnt;
1045         iscsi->frame_size_set = true;
1046         iscsi->frame_size = qedi->ll2_mtu;
1047         block = qedi_get_nvram_block(qedi);
1048         if (block) {
1049                 chap_en = !!(block->generic.ctrl_flags &
1050                              NVM_ISCSI_CFG_GEN_CHAP_ENABLED);
1051                 mchap_en = !!(block->generic.ctrl_flags &
1052                               NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED);
1053
1054                 iscsi->auth_method_set = (chap_en || mchap_en) ? true : false;
1055                 iscsi->auth_method = 1;
1056                 if (chap_en)
1057                         iscsi->auth_method = 2;
1058                 if (mchap_en)
1059                         iscsi->auth_method = 3;
1060
1061                 iscsi->tx_desc_size_set = true;
1062                 iscsi->tx_desc_size = QEDI_SQ_SIZE;
1063                 iscsi->rx_desc_size_set = true;
1064                 iscsi->rx_desc_size = QEDI_CQ_SIZE;
1065
1066                 /* tpgt, hdr digest, data digest */
1067                 rval = qedi_find_boot_info(qedi, iscsi, block);
1068                 if (rval)
1069                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1070                                   "Boot target not set");
1071         }
1072
1073         kfree(fw_iscsi_stats);
1074 exit_get_data:
1075         return;
1076 }
1077
1078 static void qedi_link_update(void *dev, struct qed_link_output *link)
1079 {
1080         struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
1081
1082         if (link->link_up) {
1083                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
1084                 atomic_set(&qedi->link_state, QEDI_LINK_UP);
1085         } else {
1086                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1087                           "Link Down event.\n");
1088                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
1089         }
1090 }
1091
1092 static struct qed_iscsi_cb_ops qedi_cb_ops = {
1093         {
1094                 .link_update =          qedi_link_update,
1095                 .get_protocol_tlv_data = qedi_get_protocol_tlv_data,
1096                 .get_generic_tlv_data = qedi_get_generic_tlv_data,
1097         }
1098 };
1099
1100 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
1101                           u16 que_idx, struct qedi_percpu_s *p)
1102 {
1103         struct qedi_work *qedi_work;
1104         struct qedi_conn *q_conn;
1105         struct iscsi_conn *conn;
1106         struct qedi_cmd *qedi_cmd;
1107         u32 iscsi_cid;
1108         int rc = 0;
1109
1110         iscsi_cid  = cqe->cqe_common.conn_id;
1111         q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
1112         if (!q_conn) {
1113                 QEDI_WARN(&qedi->dbg_ctx,
1114                           "Session no longer exists for cid=0x%x!!\n",
1115                           iscsi_cid);
1116                 return -1;
1117         }
1118         conn = q_conn->cls_conn->dd_data;
1119
1120         switch (cqe->cqe_common.cqe_type) {
1121         case ISCSI_CQE_TYPE_SOLICITED:
1122         case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
1123                 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
1124                 if (!qedi_cmd) {
1125                         rc = -1;
1126                         break;
1127                 }
1128                 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
1129                 qedi_cmd->cqe_work.qedi = qedi;
1130                 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
1131                 qedi_cmd->cqe_work.que_idx = que_idx;
1132                 qedi_cmd->cqe_work.is_solicited = true;
1133                 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
1134                 break;
1135         case ISCSI_CQE_TYPE_UNSOLICITED:
1136         case ISCSI_CQE_TYPE_DUMMY:
1137         case ISCSI_CQE_TYPE_TASK_CLEANUP:
1138                 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
1139                 if (!qedi_work) {
1140                         rc = -1;
1141                         break;
1142                 }
1143                 INIT_LIST_HEAD(&qedi_work->list);
1144                 qedi_work->qedi = qedi;
1145                 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
1146                 qedi_work->que_idx = que_idx;
1147                 qedi_work->is_solicited = false;
1148                 list_add_tail(&qedi_work->list, &p->work_list);
1149                 break;
1150         default:
1151                 rc = -1;
1152                 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
1153         }
1154         return rc;
1155 }
1156
1157 static bool qedi_process_completions(struct qedi_fastpath *fp)
1158 {
1159         struct qedi_ctx *qedi = fp->qedi;
1160         struct qed_sb_info *sb_info = fp->sb_info;
1161         struct status_block_e4 *sb = sb_info->sb_virt;
1162         struct qedi_percpu_s *p = NULL;
1163         struct global_queue *que;
1164         u16 prod_idx;
1165         unsigned long flags;
1166         union iscsi_cqe *cqe;
1167         int cpu;
1168         int ret;
1169
1170         /* Get the current firmware producer index */
1171         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1172
1173         if (prod_idx >= QEDI_CQ_SIZE)
1174                 prod_idx = prod_idx % QEDI_CQ_SIZE;
1175
1176         que = qedi->global_queues[fp->sb_id];
1177         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1178                   "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
1179                   que, prod_idx, que->cq_cons_idx, fp->sb_id);
1180
1181         qedi->intr_cpu = fp->sb_id;
1182         cpu = smp_processor_id();
1183         p = &per_cpu(qedi_percpu, cpu);
1184
1185         if (unlikely(!p->iothread))
1186                 WARN_ON(1);
1187
1188         spin_lock_irqsave(&p->p_work_lock, flags);
1189         while (que->cq_cons_idx != prod_idx) {
1190                 cqe = &que->cq[que->cq_cons_idx];
1191
1192                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1193                           "cqe=%p prod_idx=%d cons_idx=%d.\n",
1194                           cqe, prod_idx, que->cq_cons_idx);
1195
1196                 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
1197                 if (ret)
1198                         QEDI_WARN(&qedi->dbg_ctx,
1199                                   "Dropping CQE 0x%x for cid=0x%x.\n",
1200                                   que->cq_cons_idx, cqe->cqe_common.conn_id);
1201
1202                 que->cq_cons_idx++;
1203                 if (que->cq_cons_idx == QEDI_CQ_SIZE)
1204                         que->cq_cons_idx = 0;
1205         }
1206         wake_up_process(p->iothread);
1207         spin_unlock_irqrestore(&p->p_work_lock, flags);
1208
1209         return true;
1210 }
1211
1212 static bool qedi_fp_has_work(struct qedi_fastpath *fp)
1213 {
1214         struct qedi_ctx *qedi = fp->qedi;
1215         struct global_queue *que;
1216         struct qed_sb_info *sb_info = fp->sb_info;
1217         struct status_block_e4 *sb = sb_info->sb_virt;
1218         u16 prod_idx;
1219
1220         barrier();
1221
1222         /* Get the current firmware producer index */
1223         prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
1224
1225         /* Get the pointer to the global CQ this completion is on */
1226         que = qedi->global_queues[fp->sb_id];
1227
1228         /* prod idx wrap around uint16 */
1229         if (prod_idx >= QEDI_CQ_SIZE)
1230                 prod_idx = prod_idx % QEDI_CQ_SIZE;
1231
1232         return (que->cq_cons_idx != prod_idx);
1233 }
1234
1235 /* MSI-X fastpath handler code */
1236 static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
1237 {
1238         struct qedi_fastpath *fp = dev_id;
1239         struct qedi_ctx *qedi = fp->qedi;
1240         bool wake_io_thread = true;
1241
1242         qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
1243
1244 process_again:
1245         wake_io_thread = qedi_process_completions(fp);
1246         if (wake_io_thread) {
1247                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1248                           "process already running\n");
1249         }
1250
1251         if (qedi_fp_has_work(fp) == 0)
1252                 qed_sb_update_sb_idx(fp->sb_info);
1253
1254         /* Check for more work */
1255         rmb();
1256
1257         if (qedi_fp_has_work(fp) == 0)
1258                 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
1259         else
1260                 goto process_again;
1261
1262         return IRQ_HANDLED;
1263 }
1264
1265 /* simd handler for MSI/INTa */
1266 static void qedi_simd_int_handler(void *cookie)
1267 {
1268         /* Cookie is qedi_ctx struct */
1269         struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
1270
1271         QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
1272 }
1273
1274 #define QEDI_SIMD_HANDLER_NUM           0
1275 static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
1276 {
1277         int i;
1278
1279         if (qedi->int_info.msix_cnt) {
1280                 for (i = 0; i < qedi->int_info.used_cnt; i++) {
1281                         synchronize_irq(qedi->int_info.msix[i].vector);
1282                         irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1283                                               NULL);
1284                         free_irq(qedi->int_info.msix[i].vector,
1285                                  &qedi->fp_array[i]);
1286                 }
1287         } else {
1288                 qedi_ops->common->simd_handler_clean(qedi->cdev,
1289                                                      QEDI_SIMD_HANDLER_NUM);
1290         }
1291
1292         qedi->int_info.used_cnt = 0;
1293         qedi_ops->common->set_fp_int(qedi->cdev, 0);
1294 }
1295
1296 static int qedi_request_msix_irq(struct qedi_ctx *qedi)
1297 {
1298         int i, rc, cpu;
1299
1300         cpu = cpumask_first(cpu_online_mask);
1301         for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
1302                 rc = request_irq(qedi->int_info.msix[i].vector,
1303                                  qedi_msix_handler, 0, "qedi",
1304                                  &qedi->fp_array[i]);
1305
1306                 if (rc) {
1307                         QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
1308                         qedi_sync_free_irqs(qedi);
1309                         return rc;
1310                 }
1311                 qedi->int_info.used_cnt++;
1312                 rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
1313                                            get_cpu_mask(cpu));
1314                 cpu = cpumask_next(cpu, cpu_online_mask);
1315         }
1316
1317         return 0;
1318 }
1319
1320 static int qedi_setup_int(struct qedi_ctx *qedi)
1321 {
1322         int rc = 0;
1323
1324         rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
1325         rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
1326         if (rc)
1327                 goto exit_setup_int;
1328
1329         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1330                   "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
1331                    qedi->int_info.msix_cnt, num_online_cpus());
1332
1333         if (qedi->int_info.msix_cnt) {
1334                 rc = qedi_request_msix_irq(qedi);
1335                 goto exit_setup_int;
1336         } else {
1337                 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
1338                                                       QEDI_SIMD_HANDLER_NUM,
1339                                                       qedi_simd_int_handler);
1340                 qedi->int_info.used_cnt = 1;
1341         }
1342
1343 exit_setup_int:
1344         return rc;
1345 }
1346
1347 static void qedi_free_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1348 {
1349         if (qedi->iscsi_cfg)
1350                 dma_free_coherent(&qedi->pdev->dev,
1351                                   sizeof(struct nvm_iscsi_cfg),
1352                                   qedi->iscsi_cfg, qedi->nvm_buf_dma);
1353 }
1354
1355 static int qedi_alloc_nvm_iscsi_cfg(struct qedi_ctx *qedi)
1356 {
1357         qedi->iscsi_cfg = dma_zalloc_coherent(&qedi->pdev->dev,
1358                                              sizeof(struct nvm_iscsi_cfg),
1359                                              &qedi->nvm_buf_dma, GFP_KERNEL);
1360         if (!qedi->iscsi_cfg) {
1361                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate NVM BUF.\n");
1362                 return -ENOMEM;
1363         }
1364         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1365                   "NVM BUF addr=0x%p dma=0x%llx.\n", qedi->iscsi_cfg,
1366                   qedi->nvm_buf_dma);
1367
1368         return 0;
1369 }
1370
1371 static void qedi_free_bdq(struct qedi_ctx *qedi)
1372 {
1373         int i;
1374
1375         if (qedi->bdq_pbl_list)
1376                 dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
1377                                   qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
1378
1379         if (qedi->bdq_pbl)
1380                 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
1381                                   qedi->bdq_pbl, qedi->bdq_pbl_dma);
1382
1383         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1384                 if (qedi->bdq[i].buf_addr) {
1385                         dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
1386                                           qedi->bdq[i].buf_addr,
1387                                           qedi->bdq[i].buf_dma);
1388                 }
1389         }
1390 }
1391
1392 static void qedi_free_global_queues(struct qedi_ctx *qedi)
1393 {
1394         int i;
1395         struct global_queue **gl = qedi->global_queues;
1396
1397         for (i = 0; i < qedi->num_queues; i++) {
1398                 if (!gl[i])
1399                         continue;
1400
1401                 if (gl[i]->cq)
1402                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
1403                                           gl[i]->cq, gl[i]->cq_dma);
1404                 if (gl[i]->cq_pbl)
1405                         dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
1406                                           gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
1407
1408                 kfree(gl[i]);
1409         }
1410         qedi_free_bdq(qedi);
1411         qedi_free_nvm_iscsi_cfg(qedi);
1412 }
1413
1414 static int qedi_alloc_bdq(struct qedi_ctx *qedi)
1415 {
1416         int i;
1417         struct scsi_bd *pbl;
1418         u64 *list;
1419         dma_addr_t page;
1420
1421         /* Alloc dma memory for BDQ buffers */
1422         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1423                 qedi->bdq[i].buf_addr =
1424                                 dma_alloc_coherent(&qedi->pdev->dev,
1425                                                    QEDI_BDQ_BUF_SIZE,
1426                                                    &qedi->bdq[i].buf_dma,
1427                                                    GFP_KERNEL);
1428                 if (!qedi->bdq[i].buf_addr) {
1429                         QEDI_ERR(&qedi->dbg_ctx,
1430                                  "Could not allocate BDQ buffer %d.\n", i);
1431                         return -ENOMEM;
1432                 }
1433         }
1434
1435         /* Alloc dma memory for BDQ page buffer list */
1436         qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
1437         qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
1438         qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
1439
1440         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
1441                   qedi->rq_num_entries);
1442
1443         qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
1444                                            qedi->bdq_pbl_mem_size,
1445                                            &qedi->bdq_pbl_dma, GFP_KERNEL);
1446         if (!qedi->bdq_pbl) {
1447                 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
1448                 return -ENOMEM;
1449         }
1450
1451         /*
1452          * Populate BDQ PBL with physical and virtual address of individual
1453          * BDQ buffers
1454          */
1455         pbl = (struct scsi_bd  *)qedi->bdq_pbl;
1456         for (i = 0; i < QEDI_BDQ_NUM; i++) {
1457                 pbl->address.hi =
1458                                 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
1459                 pbl->address.lo =
1460                                 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
1461                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1462                           "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
1463                           pbl, pbl->address.hi, pbl->address.lo, i);
1464                 pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
1465                 pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
1466                 pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
1467                 pbl->opaque.iscsi_opaque.opaque = cpu_to_le16(i);
1468                 pbl++;
1469         }
1470
1471         /* Allocate list of PBL pages */
1472         qedi->bdq_pbl_list = dma_zalloc_coherent(&qedi->pdev->dev, PAGE_SIZE,
1473                                                  &qedi->bdq_pbl_list_dma,
1474                                                  GFP_KERNEL);
1475         if (!qedi->bdq_pbl_list) {
1476                 QEDI_ERR(&qedi->dbg_ctx,
1477                          "Could not allocate list of PBL pages.\n");
1478                 return -ENOMEM;
1479         }
1480
1481         /*
1482          * Now populate PBL list with pages that contain pointers to the
1483          * individual buffers.
1484          */
1485         qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
1486         list = (u64 *)qedi->bdq_pbl_list;
1487         page = qedi->bdq_pbl_list_dma;
1488         for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
1489                 *list = qedi->bdq_pbl_dma;
1490                 list++;
1491                 page += PAGE_SIZE;
1492         }
1493
1494         return 0;
1495 }
1496
1497 static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
1498 {
1499         u32 *list;
1500         int i;
1501         int status = 0, rc;
1502         u32 *pbl;
1503         dma_addr_t page;
1504         int num_pages;
1505
1506         /*
1507          * Number of global queues (CQ / RQ). This should
1508          * be <= number of available MSIX vectors for the PF
1509          */
1510         if (!qedi->num_queues) {
1511                 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
1512                 return 1;
1513         }
1514
1515         /* Make sure we allocated the PBL that will contain the physical
1516          * addresses of our queues
1517          */
1518         if (!qedi->p_cpuq) {
1519                 status = 1;
1520                 goto mem_alloc_failure;
1521         }
1522
1523         qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
1524                                        qedi->num_queues), GFP_KERNEL);
1525         if (!qedi->global_queues) {
1526                 QEDI_ERR(&qedi->dbg_ctx,
1527                          "Unable to allocate global queues array ptr memory\n");
1528                 return -ENOMEM;
1529         }
1530         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
1531                   "qedi->global_queues=%p.\n", qedi->global_queues);
1532
1533         /* Allocate DMA coherent buffers for BDQ */
1534         rc = qedi_alloc_bdq(qedi);
1535         if (rc)
1536                 goto mem_alloc_failure;
1537
1538         /* Allocate DMA coherent buffers for NVM_ISCSI_CFG */
1539         rc = qedi_alloc_nvm_iscsi_cfg(qedi);
1540         if (rc)
1541                 goto mem_alloc_failure;
1542
1543         /* Allocate a CQ and an associated PBL for each MSI-X
1544          * vector.
1545          */
1546         for (i = 0; i < qedi->num_queues; i++) {
1547                 qedi->global_queues[i] =
1548                                         kzalloc(sizeof(*qedi->global_queues[0]),
1549                                                 GFP_KERNEL);
1550                 if (!qedi->global_queues[i]) {
1551                         QEDI_ERR(&qedi->dbg_ctx,
1552                                  "Unable to allocation global queue %d.\n", i);
1553                         goto mem_alloc_failure;
1554                 }
1555
1556                 qedi->global_queues[i]->cq_mem_size =
1557                     (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
1558                 qedi->global_queues[i]->cq_mem_size =
1559                     (qedi->global_queues[i]->cq_mem_size +
1560                     (QEDI_PAGE_SIZE - 1));
1561
1562                 qedi->global_queues[i]->cq_pbl_size =
1563                     (qedi->global_queues[i]->cq_mem_size /
1564                     QEDI_PAGE_SIZE) * sizeof(void *);
1565                 qedi->global_queues[i]->cq_pbl_size =
1566                     (qedi->global_queues[i]->cq_pbl_size +
1567                     (QEDI_PAGE_SIZE - 1));
1568
1569                 qedi->global_queues[i]->cq = dma_zalloc_coherent(&qedi->pdev->dev,
1570                                                                  qedi->global_queues[i]->cq_mem_size,
1571                                                                  &qedi->global_queues[i]->cq_dma,
1572                                                                  GFP_KERNEL);
1573
1574                 if (!qedi->global_queues[i]->cq) {
1575                         QEDI_WARN(&qedi->dbg_ctx,
1576                                   "Could not allocate cq.\n");
1577                         status = -ENOMEM;
1578                         goto mem_alloc_failure;
1579                 }
1580                 qedi->global_queues[i]->cq_pbl = dma_zalloc_coherent(&qedi->pdev->dev,
1581                                                                      qedi->global_queues[i]->cq_pbl_size,
1582                                                                      &qedi->global_queues[i]->cq_pbl_dma,
1583                                                                      GFP_KERNEL);
1584
1585                 if (!qedi->global_queues[i]->cq_pbl) {
1586                         QEDI_WARN(&qedi->dbg_ctx,
1587                                   "Could not allocate cq PBL.\n");
1588                         status = -ENOMEM;
1589                         goto mem_alloc_failure;
1590                 }
1591
1592                 /* Create PBL */
1593                 num_pages = qedi->global_queues[i]->cq_mem_size /
1594                     QEDI_PAGE_SIZE;
1595                 page = qedi->global_queues[i]->cq_dma;
1596                 pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
1597
1598                 while (num_pages--) {
1599                         *pbl = (u32)page;
1600                         pbl++;
1601                         *pbl = (u32)((u64)page >> 32);
1602                         pbl++;
1603                         page += QEDI_PAGE_SIZE;
1604                 }
1605         }
1606
1607         list = (u32 *)qedi->p_cpuq;
1608
1609         /*
1610          * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
1611          * CQ#1 PBL pointer, RQ#1 PBL pointer, etc.  Each PBL pointer points
1612          * to the physical address which contains an array of pointers to the
1613          * physical addresses of the specific queue pages.
1614          */
1615         for (i = 0; i < qedi->num_queues; i++) {
1616                 *list = (u32)qedi->global_queues[i]->cq_pbl_dma;
1617                 list++;
1618                 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
1619                 list++;
1620
1621                 *list = (u32)0;
1622                 list++;
1623                 *list = (u32)((u64)0 >> 32);
1624                 list++;
1625         }
1626
1627         return 0;
1628
1629 mem_alloc_failure:
1630         qedi_free_global_queues(qedi);
1631         return status;
1632 }
1633
1634 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1635 {
1636         int rval = 0;
1637         u32 *pbl;
1638         dma_addr_t page;
1639         int num_pages;
1640
1641         if (!ep)
1642                 return -EIO;
1643
1644         /* Calculate appropriate queue and PBL sizes */
1645         ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
1646         ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
1647
1648         ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
1649         ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
1650
1651         ep->sq = dma_zalloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
1652                                      &ep->sq_dma, GFP_KERNEL);
1653         if (!ep->sq) {
1654                 QEDI_WARN(&qedi->dbg_ctx,
1655                           "Could not allocate send queue.\n");
1656                 rval = -ENOMEM;
1657                 goto out;
1658         }
1659         ep->sq_pbl = dma_zalloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
1660                                          &ep->sq_pbl_dma, GFP_KERNEL);
1661         if (!ep->sq_pbl) {
1662                 QEDI_WARN(&qedi->dbg_ctx,
1663                           "Could not allocate send queue PBL.\n");
1664                 rval = -ENOMEM;
1665                 goto out_free_sq;
1666         }
1667
1668         /* Create PBL */
1669         num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
1670         page = ep->sq_dma;
1671         pbl = (u32 *)ep->sq_pbl;
1672
1673         while (num_pages--) {
1674                 *pbl = (u32)page;
1675                 pbl++;
1676                 *pbl = (u32)((u64)page >> 32);
1677                 pbl++;
1678                 page += QEDI_PAGE_SIZE;
1679         }
1680
1681         return rval;
1682
1683 out_free_sq:
1684         dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1685                           ep->sq_dma);
1686 out:
1687         return rval;
1688 }
1689
1690 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
1691 {
1692         if (ep->sq_pbl)
1693                 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
1694                                   ep->sq_pbl_dma);
1695         if (ep->sq)
1696                 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
1697                                   ep->sq_dma);
1698 }
1699
1700 int qedi_get_task_idx(struct qedi_ctx *qedi)
1701 {
1702         s16 tmp_idx;
1703
1704 again:
1705         tmp_idx = find_first_zero_bit(qedi->task_idx_map,
1706                                       MAX_ISCSI_TASK_ENTRIES);
1707
1708         if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
1709                 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
1710                 tmp_idx = -1;
1711                 goto err_idx;
1712         }
1713
1714         if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
1715                 goto again;
1716
1717 err_idx:
1718         return tmp_idx;
1719 }
1720
1721 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
1722 {
1723         if (!test_and_clear_bit(idx, qedi->task_idx_map))
1724                 QEDI_ERR(&qedi->dbg_ctx,
1725                          "FW task context, already cleared, tid=0x%x\n", idx);
1726 }
1727
1728 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
1729                          struct qedi_cmd *cmd)
1730 {
1731         qedi->itt_map[tid].itt = proto_itt;
1732         qedi->itt_map[tid].p_cmd = cmd;
1733
1734         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1735                   "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
1736                   qedi->itt_map[tid].itt);
1737 }
1738
1739 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
1740 {
1741         u16 i;
1742
1743         for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
1744                 if (qedi->itt_map[i].itt == itt) {
1745                         *tid = i;
1746                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1747                                   "Ref itt=0x%x, found at tid=0x%x\n",
1748                                   itt, *tid);
1749                         return;
1750                 }
1751         }
1752
1753         WARN_ON(1);
1754 }
1755
1756 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
1757 {
1758         *proto_itt = qedi->itt_map[tid].itt;
1759         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1760                   "Get itt map tid [0x%x with proto itt[0x%x]",
1761                   tid, *proto_itt);
1762 }
1763
1764 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
1765 {
1766         struct qedi_cmd *cmd = NULL;
1767
1768         if (tid >= MAX_ISCSI_TASK_ENTRIES)
1769                 return NULL;
1770
1771         cmd = qedi->itt_map[tid].p_cmd;
1772         if (cmd->task_id != tid)
1773                 return NULL;
1774
1775         qedi->itt_map[tid].p_cmd = NULL;
1776
1777         return cmd;
1778 }
1779
1780 static int qedi_alloc_itt(struct qedi_ctx *qedi)
1781 {
1782         qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
1783                                 sizeof(struct qedi_itt_map), GFP_KERNEL);
1784         if (!qedi->itt_map) {
1785                 QEDI_ERR(&qedi->dbg_ctx,
1786                          "Unable to allocate itt map array memory\n");
1787                 return -ENOMEM;
1788         }
1789         return 0;
1790 }
1791
1792 static void qedi_free_itt(struct qedi_ctx *qedi)
1793 {
1794         kfree(qedi->itt_map);
1795 }
1796
1797 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
1798         .rx_cb = qedi_ll2_rx,
1799         .tx_cb = NULL,
1800 };
1801
1802 static int qedi_percpu_io_thread(void *arg)
1803 {
1804         struct qedi_percpu_s *p = arg;
1805         struct qedi_work *work, *tmp;
1806         unsigned long flags;
1807         LIST_HEAD(work_list);
1808
1809         set_user_nice(current, -20);
1810
1811         while (!kthread_should_stop()) {
1812                 spin_lock_irqsave(&p->p_work_lock, flags);
1813                 while (!list_empty(&p->work_list)) {
1814                         list_splice_init(&p->work_list, &work_list);
1815                         spin_unlock_irqrestore(&p->p_work_lock, flags);
1816
1817                         list_for_each_entry_safe(work, tmp, &work_list, list) {
1818                                 list_del_init(&work->list);
1819                                 qedi_fp_process_cqes(work);
1820                                 if (!work->is_solicited)
1821                                         kfree(work);
1822                         }
1823                         cond_resched();
1824                         spin_lock_irqsave(&p->p_work_lock, flags);
1825                 }
1826                 set_current_state(TASK_INTERRUPTIBLE);
1827                 spin_unlock_irqrestore(&p->p_work_lock, flags);
1828                 schedule();
1829         }
1830         __set_current_state(TASK_RUNNING);
1831
1832         return 0;
1833 }
1834
1835 static int qedi_cpu_online(unsigned int cpu)
1836 {
1837         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1838         struct task_struct *thread;
1839
1840         thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
1841                                         cpu_to_node(cpu),
1842                                         "qedi_thread/%d", cpu);
1843         if (IS_ERR(thread))
1844                 return PTR_ERR(thread);
1845
1846         kthread_bind(thread, cpu);
1847         p->iothread = thread;
1848         wake_up_process(thread);
1849         return 0;
1850 }
1851
1852 static int qedi_cpu_offline(unsigned int cpu)
1853 {
1854         struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
1855         struct qedi_work *work, *tmp;
1856         struct task_struct *thread;
1857
1858         spin_lock_bh(&p->p_work_lock);
1859         thread = p->iothread;
1860         p->iothread = NULL;
1861
1862         list_for_each_entry_safe(work, tmp, &p->work_list, list) {
1863                 list_del_init(&work->list);
1864                 qedi_fp_process_cqes(work);
1865                 if (!work->is_solicited)
1866                         kfree(work);
1867         }
1868
1869         spin_unlock_bh(&p->p_work_lock);
1870         if (thread)
1871                 kthread_stop(thread);
1872         return 0;
1873 }
1874
1875 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
1876 {
1877         struct qed_ll2_params params;
1878
1879         qedi_recover_all_conns(qedi);
1880
1881         qedi_ops->ll2->stop(qedi->cdev);
1882         qedi_ll2_free_skbs(qedi);
1883
1884         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
1885                   qedi->ll2_mtu, mtu);
1886         memset(&params, 0, sizeof(params));
1887         qedi->ll2_mtu = mtu;
1888         params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
1889         params.drop_ttl0_packets = 0;
1890         params.rx_vlan_stripping = 1;
1891         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
1892         qedi_ops->ll2->start(qedi->cdev, &params);
1893 }
1894
1895 /**
1896  * qedi_get_nvram_block: - Scan through the iSCSI NVRAM block (while accounting
1897  * for gaps) for the matching absolute-pf-id of the QEDI device.
1898  */
1899 static struct nvm_iscsi_block *
1900 qedi_get_nvram_block(struct qedi_ctx *qedi)
1901 {
1902         int i;
1903         u8 pf;
1904         u32 flags;
1905         struct nvm_iscsi_block *block;
1906
1907         pf = qedi->dev_info.common.abs_pf_id;
1908         block = &qedi->iscsi_cfg->block[0];
1909         for (i = 0; i < NUM_OF_ISCSI_PF_SUPPORTED; i++, block++) {
1910                 flags = ((block->id) & NVM_ISCSI_CFG_BLK_CTRL_FLAG_MASK) >>
1911                         NVM_ISCSI_CFG_BLK_CTRL_FLAG_OFFSET;
1912                 if (flags & (NVM_ISCSI_CFG_BLK_CTRL_FLAG_IS_NOT_EMPTY |
1913                                 NVM_ISCSI_CFG_BLK_CTRL_FLAG_PF_MAPPED) &&
1914                         (pf == (block->id & NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_MASK)
1915                                 >> NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_OFFSET))
1916                         return block;
1917         }
1918         return NULL;
1919 }
1920
1921 static ssize_t qedi_show_boot_eth_info(void *data, int type, char *buf)
1922 {
1923         struct qedi_ctx *qedi = data;
1924         struct nvm_iscsi_initiator *initiator;
1925         int rc = 1;
1926         u32 ipv6_en, dhcp_en, ip_len;
1927         struct nvm_iscsi_block *block;
1928         char *fmt, *ip, *sub, *gw;
1929
1930         block = qedi_get_nvram_block(qedi);
1931         if (!block)
1932                 return 0;
1933
1934         initiator = &block->initiator;
1935         ipv6_en = block->generic.ctrl_flags &
1936                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
1937         dhcp_en = block->generic.ctrl_flags &
1938                   NVM_ISCSI_CFG_GEN_DHCP_TCPIP_CONFIG_ENABLED;
1939         /* Static IP assignments. */
1940         fmt = ipv6_en ? "%pI6\n" : "%pI4\n";
1941         ip = ipv6_en ? initiator->ipv6.addr.byte : initiator->ipv4.addr.byte;
1942         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
1943         sub = ipv6_en ? initiator->ipv6.subnet_mask.byte :
1944               initiator->ipv4.subnet_mask.byte;
1945         gw = ipv6_en ? initiator->ipv6.gateway.byte :
1946              initiator->ipv4.gateway.byte;
1947         /* DHCP IP adjustments. */
1948         fmt = dhcp_en ? "%s\n" : fmt;
1949         if (dhcp_en) {
1950                 ip = ipv6_en ? "0::0" : "0.0.0.0";
1951                 sub = ip;
1952                 gw = ip;
1953                 ip_len = ipv6_en ? 5 : 8;
1954         }
1955
1956         switch (type) {
1957         case ISCSI_BOOT_ETH_IP_ADDR:
1958                 rc = snprintf(buf, ip_len, fmt, ip);
1959                 break;
1960         case ISCSI_BOOT_ETH_SUBNET_MASK:
1961                 rc = snprintf(buf, ip_len, fmt, sub);
1962                 break;
1963         case ISCSI_BOOT_ETH_GATEWAY:
1964                 rc = snprintf(buf, ip_len, fmt, gw);
1965                 break;
1966         case ISCSI_BOOT_ETH_FLAGS:
1967                 rc = snprintf(buf, 3, "%hhd\n",
1968                               SYSFS_FLAG_FW_SEL_BOOT);
1969                 break;
1970         case ISCSI_BOOT_ETH_INDEX:
1971                 rc = snprintf(buf, 3, "0\n");
1972                 break;
1973         case ISCSI_BOOT_ETH_MAC:
1974                 rc = sysfs_format_mac(buf, qedi->mac, ETH_ALEN);
1975                 break;
1976         case ISCSI_BOOT_ETH_VLAN:
1977                 rc = snprintf(buf, 12, "%d\n",
1978                               GET_FIELD2(initiator->generic_cont0,
1979                                          NVM_ISCSI_CFG_INITIATOR_VLAN));
1980                 break;
1981         case ISCSI_BOOT_ETH_ORIGIN:
1982                 if (dhcp_en)
1983                         rc = snprintf(buf, 3, "3\n");
1984                 break;
1985         default:
1986                 rc = 0;
1987                 break;
1988         }
1989
1990         return rc;
1991 }
1992
1993 static umode_t qedi_eth_get_attr_visibility(void *data, int type)
1994 {
1995         int rc = 1;
1996
1997         switch (type) {
1998         case ISCSI_BOOT_ETH_FLAGS:
1999         case ISCSI_BOOT_ETH_MAC:
2000         case ISCSI_BOOT_ETH_INDEX:
2001         case ISCSI_BOOT_ETH_IP_ADDR:
2002         case ISCSI_BOOT_ETH_SUBNET_MASK:
2003         case ISCSI_BOOT_ETH_GATEWAY:
2004         case ISCSI_BOOT_ETH_ORIGIN:
2005         case ISCSI_BOOT_ETH_VLAN:
2006                 rc = 0444;
2007                 break;
2008         default:
2009                 rc = 0;
2010                 break;
2011         }
2012         return rc;
2013 }
2014
2015 static ssize_t qedi_show_boot_ini_info(void *data, int type, char *buf)
2016 {
2017         struct qedi_ctx *qedi = data;
2018         struct nvm_iscsi_initiator *initiator;
2019         int rc;
2020         struct nvm_iscsi_block *block;
2021
2022         block = qedi_get_nvram_block(qedi);
2023         if (!block)
2024                 return 0;
2025
2026         initiator = &block->initiator;
2027
2028         switch (type) {
2029         case ISCSI_BOOT_INI_INITIATOR_NAME:
2030                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2031                              initiator->initiator_name.byte);
2032                 break;
2033         default:
2034                 rc = 0;
2035                 break;
2036         }
2037         return rc;
2038 }
2039
2040 static umode_t qedi_ini_get_attr_visibility(void *data, int type)
2041 {
2042         int rc;
2043
2044         switch (type) {
2045         case ISCSI_BOOT_INI_INITIATOR_NAME:
2046                 rc = 0444;
2047                 break;
2048         default:
2049                 rc = 0;
2050                 break;
2051         }
2052         return rc;
2053 }
2054
2055 static ssize_t
2056 qedi_show_boot_tgt_info(struct qedi_ctx *qedi, int type,
2057                         char *buf, enum qedi_nvm_tgts idx)
2058 {
2059         int rc = 1;
2060         u32 ctrl_flags, ipv6_en, chap_en, mchap_en, ip_len;
2061         struct nvm_iscsi_block *block;
2062         char *chap_name, *chap_secret;
2063         char *mchap_name, *mchap_secret;
2064
2065         block = qedi_get_nvram_block(qedi);
2066         if (!block)
2067                 goto exit_show_tgt_info;
2068
2069         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2070                   "Port:%d, tgt_idx:%d\n",
2071                   GET_FIELD2(block->id, NVM_ISCSI_CFG_BLK_MAPPED_PF_ID), idx);
2072
2073         ctrl_flags = block->target[idx].ctrl_flags &
2074                      NVM_ISCSI_CFG_TARGET_ENABLED;
2075
2076         if (!ctrl_flags) {
2077                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT,
2078                           "Target disabled\n");
2079                 goto exit_show_tgt_info;
2080         }
2081
2082         ipv6_en = block->generic.ctrl_flags &
2083                   NVM_ISCSI_CFG_GEN_IPV6_ENABLED;
2084         ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN;
2085         chap_en = block->generic.ctrl_flags &
2086                   NVM_ISCSI_CFG_GEN_CHAP_ENABLED;
2087         chap_name = chap_en ? block->initiator.chap_name.byte : NULL;
2088         chap_secret = chap_en ? block->initiator.chap_password.byte : NULL;
2089
2090         mchap_en = block->generic.ctrl_flags &
2091                   NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED;
2092         mchap_name = mchap_en ? block->target[idx].chap_name.byte : NULL;
2093         mchap_secret = mchap_en ? block->target[idx].chap_password.byte : NULL;
2094
2095         switch (type) {
2096         case ISCSI_BOOT_TGT_NAME:
2097                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN,
2098                              block->target[idx].target_name.byte);
2099                 break;
2100         case ISCSI_BOOT_TGT_IP_ADDR:
2101                 if (ipv6_en)
2102                         rc = snprintf(buf, ip_len, "%pI6\n",
2103                                       block->target[idx].ipv6_addr.byte);
2104                 else
2105                         rc = snprintf(buf, ip_len, "%pI4\n",
2106                                       block->target[idx].ipv4_addr.byte);
2107                 break;
2108         case ISCSI_BOOT_TGT_PORT:
2109                 rc = snprintf(buf, 12, "%d\n",
2110                               GET_FIELD2(block->target[idx].generic_cont0,
2111                                          NVM_ISCSI_CFG_TARGET_TCP_PORT));
2112                 break;
2113         case ISCSI_BOOT_TGT_LUN:
2114                 rc = snprintf(buf, 22, "%.*d\n",
2115                               block->target[idx].lun.value[1],
2116                               block->target[idx].lun.value[0]);
2117                 break;
2118         case ISCSI_BOOT_TGT_CHAP_NAME:
2119                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2120                              chap_name);
2121                 break;
2122         case ISCSI_BOOT_TGT_CHAP_SECRET:
2123                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2124                              chap_secret);
2125                 break;
2126         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2127                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2128                              mchap_name);
2129                 break;
2130         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2131                 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN,
2132                              mchap_secret);
2133                 break;
2134         case ISCSI_BOOT_TGT_FLAGS:
2135                 rc = snprintf(buf, 3, "%hhd\n", SYSFS_FLAG_FW_SEL_BOOT);
2136                 break;
2137         case ISCSI_BOOT_TGT_NIC_ASSOC:
2138                 rc = snprintf(buf, 3, "0\n");
2139                 break;
2140         default:
2141                 rc = 0;
2142                 break;
2143         }
2144
2145 exit_show_tgt_info:
2146         return rc;
2147 }
2148
2149 static ssize_t qedi_show_boot_tgt_pri_info(void *data, int type, char *buf)
2150 {
2151         struct qedi_ctx *qedi = data;
2152
2153         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_PRI);
2154 }
2155
2156 static ssize_t qedi_show_boot_tgt_sec_info(void *data, int type, char *buf)
2157 {
2158         struct qedi_ctx *qedi = data;
2159
2160         return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_SEC);
2161 }
2162
2163 static umode_t qedi_tgt_get_attr_visibility(void *data, int type)
2164 {
2165         int rc;
2166
2167         switch (type) {
2168         case ISCSI_BOOT_TGT_NAME:
2169         case ISCSI_BOOT_TGT_IP_ADDR:
2170         case ISCSI_BOOT_TGT_PORT:
2171         case ISCSI_BOOT_TGT_LUN:
2172         case ISCSI_BOOT_TGT_CHAP_NAME:
2173         case ISCSI_BOOT_TGT_CHAP_SECRET:
2174         case ISCSI_BOOT_TGT_REV_CHAP_NAME:
2175         case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
2176         case ISCSI_BOOT_TGT_NIC_ASSOC:
2177         case ISCSI_BOOT_TGT_FLAGS:
2178                 rc = 0444;
2179                 break;
2180         default:
2181                 rc = 0;
2182                 break;
2183         }
2184         return rc;
2185 }
2186
2187 static void qedi_boot_release(void *data)
2188 {
2189         struct qedi_ctx *qedi = data;
2190
2191         scsi_host_put(qedi->shost);
2192 }
2193
2194 static int qedi_get_boot_info(struct qedi_ctx *qedi)
2195 {
2196         int ret = 1;
2197         u16 len;
2198
2199         len = sizeof(struct nvm_iscsi_cfg);
2200
2201         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2202                   "Get NVM iSCSI CFG image\n");
2203         ret = qedi_ops->common->nvm_get_image(qedi->cdev,
2204                                               QED_NVM_IMAGE_ISCSI_CFG,
2205                                               (char *)qedi->iscsi_cfg, len);
2206         if (ret)
2207                 QEDI_ERR(&qedi->dbg_ctx,
2208                          "Could not get NVM image. ret = %d\n", ret);
2209
2210         return ret;
2211 }
2212
2213 static int qedi_setup_boot_info(struct qedi_ctx *qedi)
2214 {
2215         struct iscsi_boot_kobj *boot_kobj;
2216
2217         if (qedi_get_boot_info(qedi))
2218                 return -EPERM;
2219
2220         qedi->boot_kset = iscsi_boot_create_host_kset(qedi->shost->host_no);
2221         if (!qedi->boot_kset)
2222                 goto kset_free;
2223
2224         if (!scsi_host_get(qedi->shost))
2225                 goto kset_free;
2226
2227         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 0, qedi,
2228                                              qedi_show_boot_tgt_pri_info,
2229                                              qedi_tgt_get_attr_visibility,
2230                                              qedi_boot_release);
2231         if (!boot_kobj)
2232                 goto put_host;
2233
2234         if (!scsi_host_get(qedi->shost))
2235                 goto kset_free;
2236
2237         boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 1, qedi,
2238                                              qedi_show_boot_tgt_sec_info,
2239                                              qedi_tgt_get_attr_visibility,
2240                                              qedi_boot_release);
2241         if (!boot_kobj)
2242                 goto put_host;
2243
2244         if (!scsi_host_get(qedi->shost))
2245                 goto kset_free;
2246
2247         boot_kobj = iscsi_boot_create_initiator(qedi->boot_kset, 0, qedi,
2248                                                 qedi_show_boot_ini_info,
2249                                                 qedi_ini_get_attr_visibility,
2250                                                 qedi_boot_release);
2251         if (!boot_kobj)
2252                 goto put_host;
2253
2254         if (!scsi_host_get(qedi->shost))
2255                 goto kset_free;
2256
2257         boot_kobj = iscsi_boot_create_ethernet(qedi->boot_kset, 0, qedi,
2258                                                qedi_show_boot_eth_info,
2259                                                qedi_eth_get_attr_visibility,
2260                                                qedi_boot_release);
2261         if (!boot_kobj)
2262                 goto put_host;
2263
2264         return 0;
2265
2266 put_host:
2267         scsi_host_put(qedi->shost);
2268 kset_free:
2269         iscsi_boot_destroy_kset(qedi->boot_kset);
2270         return -ENOMEM;
2271 }
2272
2273 static void __qedi_remove(struct pci_dev *pdev, int mode)
2274 {
2275         struct qedi_ctx *qedi = pci_get_drvdata(pdev);
2276         int rval;
2277
2278         if (qedi->tmf_thread) {
2279                 flush_workqueue(qedi->tmf_thread);
2280                 destroy_workqueue(qedi->tmf_thread);
2281                 qedi->tmf_thread = NULL;
2282         }
2283
2284         if (qedi->offload_thread) {
2285                 flush_workqueue(qedi->offload_thread);
2286                 destroy_workqueue(qedi->offload_thread);
2287                 qedi->offload_thread = NULL;
2288         }
2289
2290 #ifdef CONFIG_DEBUG_FS
2291         qedi_dbg_host_exit(&qedi->dbg_ctx);
2292 #endif
2293         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
2294                 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2295
2296         qedi_sync_free_irqs(qedi);
2297
2298         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2299                 qedi_ops->stop(qedi->cdev);
2300                 qedi_ops->ll2->stop(qedi->cdev);
2301         }
2302
2303         if (mode == QEDI_MODE_NORMAL)
2304                 qedi_free_iscsi_pf_param(qedi);
2305
2306         rval = qedi_ops->common->update_drv_state(qedi->cdev, false);
2307         if (rval)
2308                 QEDI_ERR(&qedi->dbg_ctx, "Failed to send drv state to MFW\n");
2309
2310         if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
2311                 qedi_ops->common->slowpath_stop(qedi->cdev);
2312                 qedi_ops->common->remove(qedi->cdev);
2313         }
2314
2315         qedi_destroy_fp(qedi);
2316
2317         if (mode == QEDI_MODE_NORMAL) {
2318                 qedi_release_cid_que(qedi);
2319                 qedi_cm_free_mem(qedi);
2320                 qedi_free_uio(qedi->udev);
2321                 qedi_free_itt(qedi);
2322
2323                 iscsi_host_remove(qedi->shost);
2324                 iscsi_host_free(qedi->shost);
2325
2326                 if (qedi->ll2_recv_thread) {
2327                         kthread_stop(qedi->ll2_recv_thread);
2328                         qedi->ll2_recv_thread = NULL;
2329                 }
2330                 qedi_ll2_free_skbs(qedi);
2331
2332                 if (qedi->boot_kset)
2333                         iscsi_boot_destroy_kset(qedi->boot_kset);
2334         }
2335 }
2336
2337 static int __qedi_probe(struct pci_dev *pdev, int mode)
2338 {
2339         struct qedi_ctx *qedi;
2340         struct qed_ll2_params params;
2341         u32 dp_module = 0;
2342         u8 dp_level = 0;
2343         bool is_vf = false;
2344         char host_buf[16];
2345         struct qed_link_params link_params;
2346         struct qed_slowpath_params sp_params;
2347         struct qed_probe_params qed_params;
2348         void *task_start, *task_end;
2349         int rc;
2350         u16 tmp;
2351
2352         if (mode != QEDI_MODE_RECOVERY) {
2353                 qedi = qedi_host_alloc(pdev);
2354                 if (!qedi) {
2355                         rc = -ENOMEM;
2356                         goto exit_probe;
2357                 }
2358         } else {
2359                 qedi = pci_get_drvdata(pdev);
2360         }
2361
2362         memset(&qed_params, 0, sizeof(qed_params));
2363         qed_params.protocol = QED_PROTOCOL_ISCSI;
2364         qed_params.dp_module = dp_module;
2365         qed_params.dp_level = dp_level;
2366         qed_params.is_vf = is_vf;
2367         qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
2368         if (!qedi->cdev) {
2369                 rc = -ENODEV;
2370                 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
2371                 goto free_host;
2372         }
2373
2374         atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2375
2376         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2377         if (rc)
2378                 goto free_host;
2379
2380         if (mode != QEDI_MODE_RECOVERY) {
2381                 rc = qedi_set_iscsi_pf_param(qedi);
2382                 if (rc) {
2383                         rc = -ENOMEM;
2384                         QEDI_ERR(&qedi->dbg_ctx,
2385                                  "Set iSCSI pf param fail\n");
2386                         goto free_host;
2387                 }
2388         }
2389
2390         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2391
2392         rc = qedi_prepare_fp(qedi);
2393         if (rc) {
2394                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
2395                 goto free_pf_params;
2396         }
2397
2398         /* Start the Slowpath-process */
2399         memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
2400         sp_params.int_mode = QED_INT_MODE_MSIX;
2401         sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
2402         sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
2403         sp_params.drv_rev = QEDI_DRIVER_REV_VER;
2404         sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
2405         strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
2406         rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
2407         if (rc) {
2408                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
2409                 goto stop_hw;
2410         }
2411
2412         /* update_pf_params needs to be called before and after slowpath
2413          * start
2414          */
2415         qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
2416
2417         rc = qedi_setup_int(qedi);
2418         if (rc)
2419                 goto stop_iscsi_func;
2420
2421         qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
2422
2423         /* Learn information crucial for qedi to progress */
2424         rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
2425         if (rc)
2426                 goto stop_iscsi_func;
2427
2428         /* Record BDQ producer doorbell addresses */
2429         qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
2430         qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
2431         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2432                   "BDQ primary_prod=%p secondary_prod=%p.\n",
2433                   qedi->bdq_primary_prod,
2434                   qedi->bdq_secondary_prod);
2435
2436         /*
2437          * We need to write the number of BDs in the BDQ we've preallocated so
2438          * the f/w will do a prefetch and we'll get an unsolicited CQE when a
2439          * packet arrives.
2440          */
2441         qedi->bdq_prod_idx = QEDI_BDQ_NUM;
2442         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2443                   "Writing %d to primary and secondary BDQ doorbell registers.\n",
2444                   qedi->bdq_prod_idx);
2445         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
2446         tmp = readw(qedi->bdq_primary_prod);
2447         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
2448         tmp = readw(qedi->bdq_secondary_prod);
2449
2450         ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
2451         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
2452                   qedi->mac);
2453
2454         sprintf(host_buf, "host_%d", qedi->shost->host_no);
2455         qedi_ops->common->set_name(qedi->cdev, host_buf);
2456
2457         qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
2458
2459         memset(&params, 0, sizeof(params));
2460         params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
2461         qedi->ll2_mtu = DEF_PATH_MTU;
2462         params.drop_ttl0_packets = 0;
2463         params.rx_vlan_stripping = 1;
2464         ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
2465
2466         if (mode != QEDI_MODE_RECOVERY) {
2467                 /* set up rx path */
2468                 INIT_LIST_HEAD(&qedi->ll2_skb_list);
2469                 spin_lock_init(&qedi->ll2_lock);
2470                 /* start qedi context */
2471                 spin_lock_init(&qedi->hba_lock);
2472                 spin_lock_init(&qedi->task_idx_lock);
2473         }
2474         qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
2475         qedi_ops->ll2->start(qedi->cdev, &params);
2476
2477         if (mode != QEDI_MODE_RECOVERY) {
2478                 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
2479                                                     (void *)qedi,
2480                                                     "qedi_ll2_thread");
2481         }
2482
2483         rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
2484                              qedi, qedi_iscsi_event_cb);
2485         if (rc) {
2486                 rc = -ENODEV;
2487                 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
2488                 goto stop_slowpath;
2489         }
2490
2491         task_start = qedi_get_task_mem(&qedi->tasks, 0);
2492         task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
2493         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
2494                   "Task context start=%p, end=%p block_size=%u.\n",
2495                    task_start, task_end, qedi->tasks.size);
2496
2497         memset(&link_params, 0, sizeof(link_params));
2498         link_params.link_up = true;
2499         rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
2500         if (rc) {
2501                 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
2502                 atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
2503         }
2504
2505 #ifdef CONFIG_DEBUG_FS
2506         qedi_dbg_host_init(&qedi->dbg_ctx, qedi_debugfs_ops,
2507                            qedi_dbg_fops);
2508 #endif
2509         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
2510                   "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
2511                   QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
2512                   FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
2513
2514         if (mode == QEDI_MODE_NORMAL) {
2515                 if (iscsi_host_add(qedi->shost, &pdev->dev)) {
2516                         QEDI_ERR(&qedi->dbg_ctx,
2517                                  "Could not add iscsi host\n");
2518                         rc = -ENOMEM;
2519                         goto remove_host;
2520                 }
2521
2522                 /* Allocate uio buffers */
2523                 rc = qedi_alloc_uio_rings(qedi);
2524                 if (rc) {
2525                         QEDI_ERR(&qedi->dbg_ctx,
2526                                  "UIO alloc ring failed err=%d\n", rc);
2527                         goto remove_host;
2528                 }
2529
2530                 rc = qedi_init_uio(qedi);
2531                 if (rc) {
2532                         QEDI_ERR(&qedi->dbg_ctx,
2533                                  "UIO init failed, err=%d\n", rc);
2534                         goto free_uio;
2535                 }
2536
2537                 /* host the array on iscsi_conn */
2538                 rc = qedi_setup_cid_que(qedi);
2539                 if (rc) {
2540                         QEDI_ERR(&qedi->dbg_ctx,
2541                                  "Could not setup cid que\n");
2542                         goto free_uio;
2543                 }
2544
2545                 rc = qedi_cm_alloc_mem(qedi);
2546                 if (rc) {
2547                         QEDI_ERR(&qedi->dbg_ctx,
2548                                  "Could not alloc cm memory\n");
2549                         goto free_cid_que;
2550                 }
2551
2552                 rc = qedi_alloc_itt(qedi);
2553                 if (rc) {
2554                         QEDI_ERR(&qedi->dbg_ctx,
2555                                  "Could not alloc itt memory\n");
2556                         goto free_cid_que;
2557                 }
2558
2559                 sprintf(host_buf, "host_%d", qedi->shost->host_no);
2560                 qedi->tmf_thread = create_singlethread_workqueue(host_buf);
2561                 if (!qedi->tmf_thread) {
2562                         QEDI_ERR(&qedi->dbg_ctx,
2563                                  "Unable to start tmf thread!\n");
2564                         rc = -ENODEV;
2565                         goto free_cid_que;
2566                 }
2567
2568                 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
2569                 qedi->offload_thread = create_workqueue(host_buf);
2570                 if (!qedi->offload_thread) {
2571                         QEDI_ERR(&qedi->dbg_ctx,
2572                                  "Unable to start offload thread!\n");
2573                         rc = -ENODEV;
2574                         goto free_cid_que;
2575                 }
2576
2577                 /* F/w needs 1st task context memory entry for performance */
2578                 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
2579                 atomic_set(&qedi->num_offloads, 0);
2580
2581                 if (qedi_setup_boot_info(qedi))
2582                         QEDI_ERR(&qedi->dbg_ctx,
2583                                  "No iSCSI boot target configured\n");
2584
2585                 rc = qedi_ops->common->update_drv_state(qedi->cdev, true);
2586                 if (rc)
2587                         QEDI_ERR(&qedi->dbg_ctx,
2588                                  "Failed to send drv state to MFW\n");
2589
2590         }
2591
2592         return 0;
2593
2594 free_cid_que:
2595         qedi_release_cid_que(qedi);
2596 free_uio:
2597         qedi_free_uio(qedi->udev);
2598 remove_host:
2599 #ifdef CONFIG_DEBUG_FS
2600         qedi_dbg_host_exit(&qedi->dbg_ctx);
2601 #endif
2602         iscsi_host_remove(qedi->shost);
2603 stop_iscsi_func:
2604         qedi_ops->stop(qedi->cdev);
2605 stop_slowpath:
2606         qedi_ops->common->slowpath_stop(qedi->cdev);
2607 stop_hw:
2608         qedi_ops->common->remove(qedi->cdev);
2609 free_pf_params:
2610         qedi_free_iscsi_pf_param(qedi);
2611 free_host:
2612         iscsi_host_free(qedi->shost);
2613 exit_probe:
2614         return rc;
2615 }
2616
2617 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2618 {
2619         return __qedi_probe(pdev, QEDI_MODE_NORMAL);
2620 }
2621
2622 static void qedi_remove(struct pci_dev *pdev)
2623 {
2624         __qedi_remove(pdev, QEDI_MODE_NORMAL);
2625 }
2626
2627 static struct pci_device_id qedi_pci_tbl[] = {
2628         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
2629         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) },
2630         { 0 },
2631 };
2632 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
2633
2634 static enum cpuhp_state qedi_cpuhp_state;
2635
2636 static struct pci_driver qedi_pci_driver = {
2637         .name = QEDI_MODULE_NAME,
2638         .id_table = qedi_pci_tbl,
2639         .probe = qedi_probe,
2640         .remove = qedi_remove,
2641 };
2642
2643 static int __init qedi_init(void)
2644 {
2645         struct qedi_percpu_s *p;
2646         int cpu, rc = 0;
2647
2648         qedi_ops = qed_get_iscsi_ops();
2649         if (!qedi_ops) {
2650                 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
2651                 return -EINVAL;
2652         }
2653
2654 #ifdef CONFIG_DEBUG_FS
2655         qedi_dbg_init("qedi");
2656 #endif
2657
2658         qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
2659         if (!qedi_scsi_transport) {
2660                 QEDI_ERR(NULL, "Could not register qedi transport");
2661                 rc = -ENOMEM;
2662                 goto exit_qedi_init_1;
2663         }
2664
2665         for_each_possible_cpu(cpu) {
2666                 p = &per_cpu(qedi_percpu, cpu);
2667                 INIT_LIST_HEAD(&p->work_list);
2668                 spin_lock_init(&p->p_work_lock);
2669                 p->iothread = NULL;
2670         }
2671
2672         rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
2673                                qedi_cpu_online, qedi_cpu_offline);
2674         if (rc < 0)
2675                 goto exit_qedi_init_2;
2676         qedi_cpuhp_state = rc;
2677
2678         rc = pci_register_driver(&qedi_pci_driver);
2679         if (rc) {
2680                 QEDI_ERR(NULL, "Failed to register driver\n");
2681                 goto exit_qedi_hp;
2682         }
2683
2684         return 0;
2685
2686 exit_qedi_hp:
2687         cpuhp_remove_state(qedi_cpuhp_state);
2688 exit_qedi_init_2:
2689         iscsi_unregister_transport(&qedi_iscsi_transport);
2690 exit_qedi_init_1:
2691 #ifdef CONFIG_DEBUG_FS
2692         qedi_dbg_exit();
2693 #endif
2694         qed_put_iscsi_ops();
2695         return rc;
2696 }
2697
2698 static void __exit qedi_cleanup(void)
2699 {
2700         pci_unregister_driver(&qedi_pci_driver);
2701         cpuhp_remove_state(qedi_cpuhp_state);
2702         iscsi_unregister_transport(&qedi_iscsi_transport);
2703
2704 #ifdef CONFIG_DEBUG_FS
2705         qedi_dbg_exit();
2706 #endif
2707         qed_put_iscsi_ops();
2708 }
2709
2710 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
2711 MODULE_LICENSE("GPL");
2712 MODULE_AUTHOR("QLogic Corporation");
2713 MODULE_VERSION(QEDI_MODULE_VERSION);
2714 module_init(qedi_init);
2715 module_exit(qedi_cleanup);