1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * QLogic iSCSI Offload Driver 4 * Copyright (c) 2016 Cavium Inc. 5 */ 6 7 #include <linux/module.h> 8 #include <linux/pci.h> 9 #include <linux/kernel.h> 10 #include <linux/if_arp.h> 11 #include <scsi/iscsi_if.h> 12 #include <linux/inet.h> 13 #include <net/arp.h> 14 #include <linux/list.h> 15 #include <linux/kthread.h> 16 #include <linux/mm.h> 17 #include <linux/if_vlan.h> 18 #include <linux/cpu.h> 19 #include <linux/iscsi_boot_sysfs.h> 20 21 #include <scsi/scsi_cmnd.h> 22 #include <scsi/scsi_device.h> 23 #include <scsi/scsi_eh.h> 24 #include <scsi/scsi_host.h> 25 #include <scsi/scsi.h> 26 27 #include "qedi.h" 28 #include "qedi_gbl.h" 29 #include "qedi_iscsi.h" 30 31 static uint qedi_qed_debug; 32 module_param(qedi_qed_debug, uint, 0644); 33 MODULE_PARM_DESC(qedi_qed_debug, " QED debug level 0 (default)"); 34 35 static uint qedi_fw_debug; 36 module_param(qedi_fw_debug, uint, 0644); 37 MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3"); 38 39 uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM; 40 module_param(qedi_dbg_log, uint, 0644); 41 MODULE_PARM_DESC(qedi_dbg_log, " Default debug level"); 42 43 uint qedi_io_tracing; 44 module_param(qedi_io_tracing, uint, 0644); 45 MODULE_PARM_DESC(qedi_io_tracing, 46 " Enable logging of SCSI requests/completions into trace buffer. (default off)."); 47 48 static uint qedi_ll2_buf_size = 0x400; 49 module_param(qedi_ll2_buf_size, uint, 0644); 50 MODULE_PARM_DESC(qedi_ll2_buf_size, 51 "parameter to set ping packet size, default - 0x400, Jumbo packets - 0x2400."); 52 53 static uint qedi_flags_override; 54 module_param(qedi_flags_override, uint, 0644); 55 MODULE_PARM_DESC(qedi_flags_override, "Disable/Enable MFW error flags bits action."); 56 57 const struct qed_iscsi_ops *qedi_ops; 58 static struct scsi_transport_template *qedi_scsi_transport; 59 static struct pci_driver qedi_pci_driver; 60 static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu); 61 static LIST_HEAD(qedi_udev_list); 62 /* Static function declaration */ 63 static int qedi_alloc_global_queues(struct qedi_ctx *qedi); 64 static void qedi_free_global_queues(struct qedi_ctx *qedi); 65 static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid); 66 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev); 67 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi); 68 static struct nvm_iscsi_block *qedi_get_nvram_block(struct qedi_ctx *qedi); 69 static void qedi_recovery_handler(struct work_struct *work); 70 static void qedi_schedule_hw_err_handler(void *dev, 71 enum qed_hw_err_type err_type); 72 73 static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle) 74 { 75 struct qedi_ctx *qedi; 76 struct qedi_endpoint *qedi_ep; 77 struct iscsi_eqe_data *data; 78 int rval = 0; 79 80 if (!context || !fw_handle) { 81 QEDI_ERR(NULL, "Recv event with ctx NULL\n"); 82 return -EINVAL; 83 } 84 85 qedi = (struct qedi_ctx *)context; 86 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 87 "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle); 88 89 data = (struct iscsi_eqe_data *)fw_handle; 90 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 91 "icid=0x%x conn_id=0x%x err-code=0x%x error-pdu-opcode-reserved=0x%x\n", 92 data->icid, data->conn_id, data->error_code, 93 data->error_pdu_opcode_reserved); 94 95 qedi_ep = qedi->ep_tbl[data->icid]; 96 97 if (!qedi_ep) { 98 QEDI_WARN(&qedi->dbg_ctx, 99 "Cannot process event, ep already disconnected, cid=0x%x\n", 100 data->icid); 101 WARN_ON(1); 102 return -ENODEV; 103 } 104 105 switch (fw_event_code) { 106 case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE: 107 if (qedi_ep->state == EP_STATE_OFLDCONN_START) 108 qedi_ep->state = EP_STATE_OFLDCONN_COMPL; 109 110 wake_up_interruptible(&qedi_ep->tcp_ofld_wait); 111 break; 112 case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE: 113 qedi_ep->state = EP_STATE_DISCONN_COMPL; 114 wake_up_interruptible(&qedi_ep->tcp_ofld_wait); 115 break; 116 case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR: 117 qedi_process_iscsi_error(qedi_ep, data); 118 break; 119 case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD: 120 case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD: 121 case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME: 122 case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT: 123 case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT: 124 case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2: 125 case ISCSI_EVENT_TYPE_TCP_CONN_ERROR: 126 qedi_process_tcp_error(qedi_ep, data); 127 break; 128 default: 129 QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n", 130 fw_event_code); 131 } 132 133 return rval; 134 } 135 136 static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode) 137 { 138 struct qedi_uio_dev *udev = uinfo->priv; 139 struct qedi_ctx *qedi = udev->qedi; 140 141 if (!capable(CAP_NET_ADMIN)) 142 return -EPERM; 143 144 if (udev->uio_dev != -1) 145 return -EBUSY; 146 147 rtnl_lock(); 148 udev->uio_dev = iminor(inode); 149 qedi_reset_uio_rings(udev); 150 set_bit(UIO_DEV_OPENED, &qedi->flags); 151 rtnl_unlock(); 152 153 return 0; 154 } 155 156 static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode) 157 { 158 struct qedi_uio_dev *udev = uinfo->priv; 159 struct qedi_ctx *qedi = udev->qedi; 160 161 udev->uio_dev = -1; 162 clear_bit(UIO_DEV_OPENED, &qedi->flags); 163 qedi_ll2_free_skbs(qedi); 164 return 0; 165 } 166 167 static void __qedi_free_uio_rings(struct qedi_uio_dev *udev) 168 { 169 if (udev->uctrl) { 170 free_page((unsigned long)udev->uctrl); 171 udev->uctrl = NULL; 172 } 173 174 if (udev->ll2_ring) { 175 free_page((unsigned long)udev->ll2_ring); 176 udev->ll2_ring = NULL; 177 } 178 179 if (udev->ll2_buf) { 180 free_pages((unsigned long)udev->ll2_buf, 2); 181 udev->ll2_buf = NULL; 182 } 183 } 184 185 static void __qedi_free_uio(struct qedi_uio_dev *udev) 186 { 187 uio_unregister_device(&udev->qedi_uinfo); 188 189 __qedi_free_uio_rings(udev); 190 191 pci_dev_put(udev->pdev); 192 kfree(udev); 193 } 194 195 static void qedi_free_uio(struct qedi_uio_dev *udev) 196 { 197 if (!udev) 198 return; 199 200 list_del_init(&udev->list); 201 __qedi_free_uio(udev); 202 } 203 204 static void qedi_reset_uio_rings(struct qedi_uio_dev *udev) 205 { 206 struct qedi_ctx *qedi = NULL; 207 struct qedi_uio_ctrl *uctrl = NULL; 208 209 qedi = udev->qedi; 210 uctrl = udev->uctrl; 211 212 spin_lock_bh(&qedi->ll2_lock); 213 uctrl->host_rx_cons = 0; 214 uctrl->hw_rx_prod = 0; 215 uctrl->hw_rx_bd_prod = 0; 216 uctrl->host_rx_bd_cons = 0; 217 218 memset(udev->ll2_ring, 0, udev->ll2_ring_size); 219 memset(udev->ll2_buf, 0, udev->ll2_buf_size); 220 spin_unlock_bh(&qedi->ll2_lock); 221 } 222 223 static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev) 224 { 225 int rc = 0; 226 227 if (udev->ll2_ring || udev->ll2_buf) 228 return rc; 229 230 /* Memory for control area. */ 231 udev->uctrl = (void *)get_zeroed_page(GFP_KERNEL); 232 if (!udev->uctrl) 233 return -ENOMEM; 234 235 /* Allocating memory for LL2 ring */ 236 udev->ll2_ring_size = QEDI_PAGE_SIZE; 237 udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP); 238 if (!udev->ll2_ring) { 239 rc = -ENOMEM; 240 goto exit_alloc_ring; 241 } 242 243 /* Allocating memory for Tx/Rx pkt buffer */ 244 udev->ll2_buf_size = TX_RX_RING * qedi_ll2_buf_size; 245 udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size); 246 udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP | 247 __GFP_ZERO, 2); 248 if (!udev->ll2_buf) { 249 rc = -ENOMEM; 250 goto exit_alloc_buf; 251 } 252 return rc; 253 254 exit_alloc_buf: 255 free_page((unsigned long)udev->ll2_ring); 256 udev->ll2_ring = NULL; 257 exit_alloc_ring: 258 return rc; 259 } 260 261 static int qedi_alloc_uio_rings(struct qedi_ctx *qedi) 262 { 263 struct qedi_uio_dev *udev = NULL; 264 int rc = 0; 265 266 list_for_each_entry(udev, &qedi_udev_list, list) { 267 if (udev->pdev == qedi->pdev) { 268 udev->qedi = qedi; 269 if (__qedi_alloc_uio_rings(udev)) { 270 udev->qedi = NULL; 271 return -ENOMEM; 272 } 273 qedi->udev = udev; 274 return 0; 275 } 276 } 277 278 udev = kzalloc(sizeof(*udev), GFP_KERNEL); 279 if (!udev) { 280 rc = -ENOMEM; 281 goto err_udev; 282 } 283 284 udev->uio_dev = -1; 285 286 udev->qedi = qedi; 287 udev->pdev = qedi->pdev; 288 289 rc = __qedi_alloc_uio_rings(udev); 290 if (rc) 291 goto err_uctrl; 292 293 list_add(&udev->list, &qedi_udev_list); 294 295 pci_dev_get(udev->pdev); 296 qedi->udev = udev; 297 298 udev->tx_pkt = udev->ll2_buf; 299 udev->rx_pkt = udev->ll2_buf + qedi_ll2_buf_size; 300 return 0; 301 302 err_uctrl: 303 kfree(udev); 304 err_udev: 305 return -ENOMEM; 306 } 307 308 static int qedi_init_uio(struct qedi_ctx *qedi) 309 { 310 struct qedi_uio_dev *udev = qedi->udev; 311 struct uio_info *uinfo; 312 int ret = 0; 313 314 if (!udev) 315 return -ENOMEM; 316 317 uinfo = &udev->qedi_uinfo; 318 319 uinfo->mem[0].addr = (unsigned long)udev->uctrl; 320 uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl); 321 uinfo->mem[0].memtype = UIO_MEM_LOGICAL; 322 323 uinfo->mem[1].addr = (unsigned long)udev->ll2_ring; 324 uinfo->mem[1].size = udev->ll2_ring_size; 325 uinfo->mem[1].memtype = UIO_MEM_LOGICAL; 326 327 uinfo->mem[2].addr = (unsigned long)udev->ll2_buf; 328 uinfo->mem[2].size = udev->ll2_buf_size; 329 uinfo->mem[2].memtype = UIO_MEM_LOGICAL; 330 331 uinfo->name = "qedi_uio"; 332 uinfo->version = QEDI_MODULE_VERSION; 333 uinfo->irq = UIO_IRQ_CUSTOM; 334 335 uinfo->open = qedi_uio_open; 336 uinfo->release = qedi_uio_close; 337 338 if (udev->uio_dev == -1) { 339 if (!uinfo->priv) { 340 uinfo->priv = udev; 341 342 ret = uio_register_device(&udev->pdev->dev, uinfo); 343 if (ret) { 344 QEDI_ERR(&qedi->dbg_ctx, 345 "UIO registration failed\n"); 346 } 347 } 348 } 349 350 return ret; 351 } 352 353 static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi, 354 struct qed_sb_info *sb_info, u16 sb_id) 355 { 356 struct status_block_e4 *sb_virt; 357 dma_addr_t sb_phys; 358 int ret; 359 360 sb_virt = dma_alloc_coherent(&qedi->pdev->dev, 361 sizeof(struct status_block_e4), &sb_phys, 362 GFP_KERNEL); 363 if (!sb_virt) { 364 QEDI_ERR(&qedi->dbg_ctx, 365 "Status block allocation failed for id = %d.\n", 366 sb_id); 367 return -ENOMEM; 368 } 369 370 ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys, 371 sb_id, QED_SB_TYPE_STORAGE); 372 if (ret) { 373 QEDI_ERR(&qedi->dbg_ctx, 374 "Status block initialization failed for id = %d.\n", 375 sb_id); 376 return ret; 377 } 378 379 return 0; 380 } 381 382 static void qedi_free_sb(struct qedi_ctx *qedi) 383 { 384 struct qed_sb_info *sb_info; 385 int id; 386 387 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) { 388 sb_info = &qedi->sb_array[id]; 389 if (sb_info->sb_virt) 390 dma_free_coherent(&qedi->pdev->dev, 391 sizeof(*sb_info->sb_virt), 392 (void *)sb_info->sb_virt, 393 sb_info->sb_phys); 394 } 395 } 396 397 static void qedi_free_fp(struct qedi_ctx *qedi) 398 { 399 kfree(qedi->fp_array); 400 kfree(qedi->sb_array); 401 } 402 403 static void qedi_destroy_fp(struct qedi_ctx *qedi) 404 { 405 qedi_free_sb(qedi); 406 qedi_free_fp(qedi); 407 } 408 409 static int qedi_alloc_fp(struct qedi_ctx *qedi) 410 { 411 int ret = 0; 412 413 qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi), 414 sizeof(struct qedi_fastpath), GFP_KERNEL); 415 if (!qedi->fp_array) { 416 QEDI_ERR(&qedi->dbg_ctx, 417 "fastpath fp array allocation failed.\n"); 418 return -ENOMEM; 419 } 420 421 qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi), 422 sizeof(struct qed_sb_info), GFP_KERNEL); 423 if (!qedi->sb_array) { 424 QEDI_ERR(&qedi->dbg_ctx, 425 "fastpath sb array allocation failed.\n"); 426 ret = -ENOMEM; 427 goto free_fp; 428 } 429 430 return ret; 431 432 free_fp: 433 qedi_free_fp(qedi); 434 return ret; 435 } 436 437 static void qedi_int_fp(struct qedi_ctx *qedi) 438 { 439 struct qedi_fastpath *fp; 440 int id; 441 442 memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) * 443 sizeof(*qedi->fp_array)); 444 memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) * 445 sizeof(*qedi->sb_array)); 446 447 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) { 448 fp = &qedi->fp_array[id]; 449 fp->sb_info = &qedi->sb_array[id]; 450 fp->sb_id = id; 451 fp->qedi = qedi; 452 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d", 453 "qedi", id); 454 455 /* fp_array[i] ---- irq cookie 456 * So init data which is needed in int ctx 457 */ 458 } 459 } 460 461 static int qedi_prepare_fp(struct qedi_ctx *qedi) 462 { 463 struct qedi_fastpath *fp; 464 int id, ret = 0; 465 466 ret = qedi_alloc_fp(qedi); 467 if (ret) 468 goto err; 469 470 qedi_int_fp(qedi); 471 472 for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) { 473 fp = &qedi->fp_array[id]; 474 ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id); 475 if (ret) { 476 QEDI_ERR(&qedi->dbg_ctx, 477 "SB allocation and initialization failed.\n"); 478 ret = -EIO; 479 goto err_init; 480 } 481 } 482 483 return 0; 484 485 err_init: 486 qedi_free_sb(qedi); 487 qedi_free_fp(qedi); 488 err: 489 return ret; 490 } 491 492 static int qedi_setup_cid_que(struct qedi_ctx *qedi) 493 { 494 int i; 495 496 qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns, 497 sizeof(u32), GFP_KERNEL); 498 if (!qedi->cid_que.cid_que_base) 499 return -ENOMEM; 500 501 qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns, 502 sizeof(struct qedi_conn *), 503 GFP_KERNEL); 504 if (!qedi->cid_que.conn_cid_tbl) { 505 kfree(qedi->cid_que.cid_que_base); 506 qedi->cid_que.cid_que_base = NULL; 507 return -ENOMEM; 508 } 509 510 qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base; 511 qedi->cid_que.cid_q_prod_idx = 0; 512 qedi->cid_que.cid_q_cons_idx = 0; 513 qedi->cid_que.cid_q_max_idx = qedi->max_active_conns; 514 qedi->cid_que.cid_free_cnt = qedi->max_active_conns; 515 516 for (i = 0; i < qedi->max_active_conns; i++) { 517 qedi->cid_que.cid_que[i] = i; 518 qedi->cid_que.conn_cid_tbl[i] = NULL; 519 } 520 521 return 0; 522 } 523 524 static void qedi_release_cid_que(struct qedi_ctx *qedi) 525 { 526 kfree(qedi->cid_que.cid_que_base); 527 qedi->cid_que.cid_que_base = NULL; 528 529 kfree(qedi->cid_que.conn_cid_tbl); 530 qedi->cid_que.conn_cid_tbl = NULL; 531 } 532 533 static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size, 534 u16 start_id, u16 next) 535 { 536 id_tbl->start = start_id; 537 id_tbl->max = size; 538 id_tbl->next = next; 539 spin_lock_init(&id_tbl->lock); 540 id_tbl->table = kcalloc(BITS_TO_LONGS(size), sizeof(long), GFP_KERNEL); 541 if (!id_tbl->table) 542 return -ENOMEM; 543 544 return 0; 545 } 546 547 static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl) 548 { 549 kfree(id_tbl->table); 550 id_tbl->table = NULL; 551 } 552 553 int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id) 554 { 555 int ret = -1; 556 557 id -= id_tbl->start; 558 if (id >= id_tbl->max) 559 return ret; 560 561 spin_lock(&id_tbl->lock); 562 if (!test_bit(id, id_tbl->table)) { 563 set_bit(id, id_tbl->table); 564 ret = 0; 565 } 566 spin_unlock(&id_tbl->lock); 567 return ret; 568 } 569 570 u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl) 571 { 572 u16 id; 573 574 spin_lock(&id_tbl->lock); 575 id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next); 576 if (id >= id_tbl->max) { 577 id = QEDI_LOCAL_PORT_INVALID; 578 if (id_tbl->next != 0) { 579 id = find_first_zero_bit(id_tbl->table, id_tbl->next); 580 if (id >= id_tbl->next) 581 id = QEDI_LOCAL_PORT_INVALID; 582 } 583 } 584 585 if (id < id_tbl->max) { 586 set_bit(id, id_tbl->table); 587 id_tbl->next = (id + 1) & (id_tbl->max - 1); 588 id += id_tbl->start; 589 } 590 591 spin_unlock(&id_tbl->lock); 592 593 return id; 594 } 595 596 void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id) 597 { 598 if (id == QEDI_LOCAL_PORT_INVALID) 599 return; 600 601 id -= id_tbl->start; 602 if (id >= id_tbl->max) 603 return; 604 605 clear_bit(id, id_tbl->table); 606 } 607 608 static void qedi_cm_free_mem(struct qedi_ctx *qedi) 609 { 610 kfree(qedi->ep_tbl); 611 qedi->ep_tbl = NULL; 612 qedi_free_id_tbl(&qedi->lcl_port_tbl); 613 } 614 615 static int qedi_cm_alloc_mem(struct qedi_ctx *qedi) 616 { 617 u16 port_id; 618 619 qedi->ep_tbl = kzalloc((qedi->max_active_conns * 620 sizeof(struct qedi_endpoint *)), GFP_KERNEL); 621 if (!qedi->ep_tbl) 622 return -ENOMEM; 623 port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE; 624 if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE, 625 QEDI_LOCAL_PORT_MIN, port_id)) { 626 qedi_cm_free_mem(qedi); 627 return -ENOMEM; 628 } 629 630 return 0; 631 } 632 633 static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev) 634 { 635 struct Scsi_Host *shost; 636 struct qedi_ctx *qedi = NULL; 637 638 shost = iscsi_host_alloc(&qedi_host_template, 639 sizeof(struct qedi_ctx), 0); 640 if (!shost) { 641 QEDI_ERR(NULL, "Could not allocate shost\n"); 642 goto exit_setup_shost; 643 } 644 645 shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA; 646 shost->max_channel = 0; 647 shost->max_lun = ~0; 648 shost->max_cmd_len = 16; 649 shost->transportt = qedi_scsi_transport; 650 651 qedi = iscsi_host_priv(shost); 652 memset(qedi, 0, sizeof(*qedi)); 653 qedi->shost = shost; 654 qedi->dbg_ctx.host_no = shost->host_no; 655 qedi->pdev = pdev; 656 qedi->dbg_ctx.pdev = pdev; 657 qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA; 658 qedi->max_sqes = QEDI_SQ_SIZE; 659 660 shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi); 661 662 pci_set_drvdata(pdev, qedi); 663 664 exit_setup_shost: 665 return qedi; 666 } 667 668 static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2) 669 { 670 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie; 671 struct skb_work_list *work; 672 struct ethhdr *eh; 673 674 if (!qedi) { 675 QEDI_ERR(NULL, "qedi is NULL\n"); 676 return -1; 677 } 678 679 if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) { 680 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO, 681 "UIO DEV is not opened\n"); 682 kfree_skb(skb); 683 return 0; 684 } 685 686 eh = (struct ethhdr *)skb->data; 687 /* Undo VLAN encapsulation */ 688 if (eh->h_proto == htons(ETH_P_8021Q)) { 689 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2); 690 eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN); 691 skb_reset_mac_header(skb); 692 } 693 694 /* Filter out non FIP/FCoE frames here to free them faster */ 695 if (eh->h_proto != htons(ETH_P_ARP) && 696 eh->h_proto != htons(ETH_P_IP) && 697 eh->h_proto != htons(ETH_P_IPV6)) { 698 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2, 699 "Dropping frame ethertype [0x%x] len [0x%x].\n", 700 eh->h_proto, skb->len); 701 kfree_skb(skb); 702 return 0; 703 } 704 705 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2, 706 "Allowed frame ethertype [0x%x] len [0x%x].\n", 707 eh->h_proto, skb->len); 708 709 work = kzalloc(sizeof(*work), GFP_ATOMIC); 710 if (!work) { 711 QEDI_WARN(&qedi->dbg_ctx, 712 "Could not allocate work so dropping frame.\n"); 713 kfree_skb(skb); 714 return 0; 715 } 716 717 INIT_LIST_HEAD(&work->list); 718 work->skb = skb; 719 720 if (skb_vlan_tag_present(skb)) 721 work->vlan_id = skb_vlan_tag_get(skb); 722 723 if (work->vlan_id) 724 __vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id); 725 726 spin_lock_bh(&qedi->ll2_lock); 727 list_add_tail(&work->list, &qedi->ll2_skb_list); 728 spin_unlock_bh(&qedi->ll2_lock); 729 730 wake_up_process(qedi->ll2_recv_thread); 731 732 return 0; 733 } 734 735 /* map this skb to iscsiuio mmaped region */ 736 static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb, 737 u16 vlan_id) 738 { 739 struct qedi_uio_dev *udev = NULL; 740 struct qedi_uio_ctrl *uctrl = NULL; 741 struct qedi_rx_bd rxbd; 742 struct qedi_rx_bd *p_rxbd; 743 u32 rx_bd_prod; 744 void *pkt; 745 int len = 0; 746 u32 prod; 747 748 if (!qedi) { 749 QEDI_ERR(NULL, "qedi is NULL\n"); 750 return -1; 751 } 752 753 udev = qedi->udev; 754 uctrl = udev->uctrl; 755 756 ++uctrl->hw_rx_prod_cnt; 757 prod = (uctrl->hw_rx_prod + 1) % RX_RING; 758 759 pkt = udev->rx_pkt + (prod * qedi_ll2_buf_size); 760 len = min_t(u32, skb->len, (u32)qedi_ll2_buf_size); 761 memcpy(pkt, skb->data, len); 762 763 memset(&rxbd, 0, sizeof(rxbd)); 764 rxbd.rx_pkt_index = prod; 765 rxbd.rx_pkt_len = len; 766 rxbd.vlan_id = vlan_id; 767 768 uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD; 769 rx_bd_prod = uctrl->hw_rx_bd_prod; 770 p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring; 771 p_rxbd += rx_bd_prod; 772 773 memcpy(p_rxbd, &rxbd, sizeof(rxbd)); 774 775 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2, 776 "hw_rx_prod [%d] prod [%d] hw_rx_bd_prod [%d] rx_pkt_idx [%d] rx_len [%d].\n", 777 uctrl->hw_rx_prod, prod, uctrl->hw_rx_bd_prod, 778 rxbd.rx_pkt_index, rxbd.rx_pkt_len); 779 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2, 780 "host_rx_cons [%d] hw_rx_bd_cons [%d].\n", 781 uctrl->host_rx_cons, uctrl->host_rx_bd_cons); 782 783 uctrl->hw_rx_prod = prod; 784 785 /* notify the iscsiuio about new packet */ 786 uio_event_notify(&udev->qedi_uinfo); 787 788 return 0; 789 } 790 791 static void qedi_ll2_free_skbs(struct qedi_ctx *qedi) 792 { 793 struct skb_work_list *work, *work_tmp; 794 795 spin_lock_bh(&qedi->ll2_lock); 796 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) { 797 list_del(&work->list); 798 kfree_skb(work->skb); 799 kfree(work); 800 } 801 spin_unlock_bh(&qedi->ll2_lock); 802 } 803 804 static int qedi_ll2_recv_thread(void *arg) 805 { 806 struct qedi_ctx *qedi = (struct qedi_ctx *)arg; 807 struct skb_work_list *work, *work_tmp; 808 809 set_user_nice(current, -20); 810 811 while (!kthread_should_stop()) { 812 spin_lock_bh(&qedi->ll2_lock); 813 list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, 814 list) { 815 list_del(&work->list); 816 qedi_ll2_process_skb(qedi, work->skb, work->vlan_id); 817 kfree_skb(work->skb); 818 kfree(work); 819 } 820 set_current_state(TASK_INTERRUPTIBLE); 821 spin_unlock_bh(&qedi->ll2_lock); 822 schedule(); 823 } 824 825 __set_current_state(TASK_RUNNING); 826 return 0; 827 } 828 829 static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi) 830 { 831 u8 num_sq_pages; 832 u32 log_page_size; 833 int rval = 0; 834 835 836 num_sq_pages = (MAX_OUTSTANDING_TASKS_PER_CON * 8) / QEDI_PAGE_SIZE; 837 838 qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi); 839 840 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 841 "Number of CQ count is %d\n", qedi->num_queues); 842 843 memset(&qedi->pf_params.iscsi_pf_params, 0, 844 sizeof(qedi->pf_params.iscsi_pf_params)); 845 846 qedi->p_cpuq = dma_alloc_coherent(&qedi->pdev->dev, 847 qedi->num_queues * sizeof(struct qedi_glbl_q_params), 848 &qedi->hw_p_cpuq, GFP_KERNEL); 849 if (!qedi->p_cpuq) { 850 QEDI_ERR(&qedi->dbg_ctx, "dma_alloc_coherent fail\n"); 851 rval = -1; 852 goto err_alloc_mem; 853 } 854 855 rval = qedi_alloc_global_queues(qedi); 856 if (rval) { 857 QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n"); 858 rval = -1; 859 goto err_alloc_mem; 860 } 861 862 qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA; 863 qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK; 864 qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10; 865 qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages; 866 qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages; 867 qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages; 868 qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues; 869 qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug; 870 qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000; 871 qedi->pf_params.iscsi_pf_params.max_fin_rt = 2; 872 873 for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) { 874 if ((1 << log_page_size) == QEDI_PAGE_SIZE) 875 break; 876 } 877 qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size; 878 879 qedi->pf_params.iscsi_pf_params.glbl_q_params_addr = 880 (u64)qedi->hw_p_cpuq; 881 882 /* RQ BDQ initializations. 883 * rq_num_entries: suggested value for Initiator is 16 (4KB RQ) 884 * rqe_log_size: 8 for 256B RQE 885 */ 886 qedi->pf_params.iscsi_pf_params.rqe_log_size = 8; 887 /* BDQ address and size */ 888 qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] = 889 qedi->bdq_pbl_list_dma; 890 qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] = 891 qedi->bdq_pbl_list_num_entries; 892 qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE; 893 894 /* cq_num_entries: num_tasks + rq_num_entries */ 895 qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048; 896 897 qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX; 898 qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1; 899 900 err_alloc_mem: 901 return rval; 902 } 903 904 /* Free DMA coherent memory for array of queue pointers we pass to qed */ 905 static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi) 906 { 907 size_t size = 0; 908 909 if (qedi->p_cpuq) { 910 size = qedi->num_queues * sizeof(struct qedi_glbl_q_params); 911 dma_free_coherent(&qedi->pdev->dev, size, qedi->p_cpuq, 912 qedi->hw_p_cpuq); 913 } 914 915 qedi_free_global_queues(qedi); 916 917 kfree(qedi->global_queues); 918 } 919 920 static void qedi_get_boot_tgt_info(struct nvm_iscsi_block *block, 921 struct qedi_boot_target *tgt, u8 index) 922 { 923 u32 ipv6_en; 924 925 ipv6_en = !!(block->generic.ctrl_flags & 926 NVM_ISCSI_CFG_GEN_IPV6_ENABLED); 927 928 snprintf(tgt->iscsi_name, sizeof(tgt->iscsi_name), "%s", 929 block->target[index].target_name.byte); 930 931 tgt->ipv6_en = ipv6_en; 932 933 if (ipv6_en) 934 snprintf(tgt->ip_addr, IPV6_LEN, "%pI6\n", 935 block->target[index].ipv6_addr.byte); 936 else 937 snprintf(tgt->ip_addr, IPV4_LEN, "%pI4\n", 938 block->target[index].ipv4_addr.byte); 939 } 940 941 static int qedi_find_boot_info(struct qedi_ctx *qedi, 942 struct qed_mfw_tlv_iscsi *iscsi, 943 struct nvm_iscsi_block *block) 944 { 945 struct qedi_boot_target *pri_tgt = NULL, *sec_tgt = NULL; 946 u32 pri_ctrl_flags = 0, sec_ctrl_flags = 0, found = 0; 947 struct iscsi_cls_session *cls_sess; 948 struct iscsi_cls_conn *cls_conn; 949 struct qedi_conn *qedi_conn; 950 struct iscsi_session *sess; 951 struct iscsi_conn *conn; 952 char ep_ip_addr[64]; 953 int i, ret = 0; 954 955 pri_ctrl_flags = !!(block->target[0].ctrl_flags & 956 NVM_ISCSI_CFG_TARGET_ENABLED); 957 if (pri_ctrl_flags) { 958 pri_tgt = kzalloc(sizeof(*pri_tgt), GFP_KERNEL); 959 if (!pri_tgt) 960 return -1; 961 qedi_get_boot_tgt_info(block, pri_tgt, 0); 962 } 963 964 sec_ctrl_flags = !!(block->target[1].ctrl_flags & 965 NVM_ISCSI_CFG_TARGET_ENABLED); 966 if (sec_ctrl_flags) { 967 sec_tgt = kzalloc(sizeof(*sec_tgt), GFP_KERNEL); 968 if (!sec_tgt) { 969 ret = -1; 970 goto free_tgt; 971 } 972 qedi_get_boot_tgt_info(block, sec_tgt, 1); 973 } 974 975 for (i = 0; i < qedi->max_active_conns; i++) { 976 qedi_conn = qedi_get_conn_from_id(qedi, i); 977 if (!qedi_conn) 978 continue; 979 980 if (qedi_conn->ep->ip_type == TCP_IPV4) 981 snprintf(ep_ip_addr, IPV4_LEN, "%pI4\n", 982 qedi_conn->ep->dst_addr); 983 else 984 snprintf(ep_ip_addr, IPV6_LEN, "%pI6\n", 985 qedi_conn->ep->dst_addr); 986 987 cls_conn = qedi_conn->cls_conn; 988 conn = cls_conn->dd_data; 989 cls_sess = iscsi_conn_to_session(cls_conn); 990 sess = cls_sess->dd_data; 991 992 if (!iscsi_is_session_online(cls_sess)) 993 continue; 994 995 if (!sess->targetname) 996 continue; 997 998 if (pri_ctrl_flags) { 999 if (!strcmp(pri_tgt->iscsi_name, sess->targetname) && 1000 !strcmp(pri_tgt->ip_addr, ep_ip_addr)) { 1001 found = 1; 1002 break; 1003 } 1004 } 1005 1006 if (sec_ctrl_flags) { 1007 if (!strcmp(sec_tgt->iscsi_name, sess->targetname) && 1008 !strcmp(sec_tgt->ip_addr, ep_ip_addr)) { 1009 found = 1; 1010 break; 1011 } 1012 } 1013 } 1014 1015 if (found) { 1016 if (conn->hdrdgst_en) { 1017 iscsi->header_digest_set = true; 1018 iscsi->header_digest = 1; 1019 } 1020 1021 if (conn->datadgst_en) { 1022 iscsi->data_digest_set = true; 1023 iscsi->data_digest = 1; 1024 } 1025 iscsi->boot_taget_portal_set = true; 1026 iscsi->boot_taget_portal = sess->tpgt; 1027 1028 } else { 1029 ret = -1; 1030 } 1031 1032 if (sec_ctrl_flags) 1033 kfree(sec_tgt); 1034 free_tgt: 1035 if (pri_ctrl_flags) 1036 kfree(pri_tgt); 1037 1038 return ret; 1039 } 1040 1041 static void qedi_get_generic_tlv_data(void *dev, struct qed_generic_tlvs *data) 1042 { 1043 struct qedi_ctx *qedi; 1044 1045 if (!dev) { 1046 QEDI_INFO(NULL, QEDI_LOG_EVT, 1047 "dev is NULL so ignoring get_generic_tlv_data request.\n"); 1048 return; 1049 } 1050 qedi = (struct qedi_ctx *)dev; 1051 1052 memset(data, 0, sizeof(struct qed_generic_tlvs)); 1053 ether_addr_copy(data->mac[0], qedi->mac); 1054 } 1055 1056 /* 1057 * Protocol TLV handler 1058 */ 1059 static void qedi_get_protocol_tlv_data(void *dev, void *data) 1060 { 1061 struct qed_mfw_tlv_iscsi *iscsi = data; 1062 struct qed_iscsi_stats *fw_iscsi_stats; 1063 struct nvm_iscsi_block *block = NULL; 1064 u32 chap_en = 0, mchap_en = 0; 1065 struct qedi_ctx *qedi = dev; 1066 int rval = 0; 1067 1068 fw_iscsi_stats = kmalloc(sizeof(*fw_iscsi_stats), GFP_KERNEL); 1069 if (!fw_iscsi_stats) { 1070 QEDI_ERR(&qedi->dbg_ctx, 1071 "Could not allocate memory for fw_iscsi_stats.\n"); 1072 goto exit_get_data; 1073 } 1074 1075 mutex_lock(&qedi->stats_lock); 1076 /* Query firmware for offload stats */ 1077 qedi_ops->get_stats(qedi->cdev, fw_iscsi_stats); 1078 mutex_unlock(&qedi->stats_lock); 1079 1080 iscsi->rx_frames_set = true; 1081 iscsi->rx_frames = fw_iscsi_stats->iscsi_rx_packet_cnt; 1082 iscsi->rx_bytes_set = true; 1083 iscsi->rx_bytes = fw_iscsi_stats->iscsi_rx_bytes_cnt; 1084 iscsi->tx_frames_set = true; 1085 iscsi->tx_frames = fw_iscsi_stats->iscsi_tx_packet_cnt; 1086 iscsi->tx_bytes_set = true; 1087 iscsi->tx_bytes = fw_iscsi_stats->iscsi_tx_bytes_cnt; 1088 iscsi->frame_size_set = true; 1089 iscsi->frame_size = qedi->ll2_mtu; 1090 block = qedi_get_nvram_block(qedi); 1091 if (block) { 1092 chap_en = !!(block->generic.ctrl_flags & 1093 NVM_ISCSI_CFG_GEN_CHAP_ENABLED); 1094 mchap_en = !!(block->generic.ctrl_flags & 1095 NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED); 1096 1097 iscsi->auth_method_set = (chap_en || mchap_en) ? true : false; 1098 iscsi->auth_method = 1; 1099 if (chap_en) 1100 iscsi->auth_method = 2; 1101 if (mchap_en) 1102 iscsi->auth_method = 3; 1103 1104 iscsi->tx_desc_size_set = true; 1105 iscsi->tx_desc_size = QEDI_SQ_SIZE; 1106 iscsi->rx_desc_size_set = true; 1107 iscsi->rx_desc_size = QEDI_CQ_SIZE; 1108 1109 /* tpgt, hdr digest, data digest */ 1110 rval = qedi_find_boot_info(qedi, iscsi, block); 1111 if (rval) 1112 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1113 "Boot target not set"); 1114 } 1115 1116 kfree(fw_iscsi_stats); 1117 exit_get_data: 1118 return; 1119 } 1120 1121 void qedi_schedule_hw_err_handler(void *dev, 1122 enum qed_hw_err_type err_type) 1123 { 1124 struct qedi_ctx *qedi = (struct qedi_ctx *)dev; 1125 unsigned long override_flags = qedi_flags_override; 1126 1127 if (override_flags && test_bit(QEDI_ERR_OVERRIDE_EN, &override_flags)) 1128 qedi->qedi_err_flags = qedi_flags_override; 1129 1130 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1131 "HW error handler scheduled, err=%d err_flags=0x%x\n", 1132 err_type, qedi->qedi_err_flags); 1133 1134 switch (err_type) { 1135 case QED_HW_ERR_FAN_FAIL: 1136 schedule_delayed_work(&qedi->board_disable_work, 0); 1137 break; 1138 case QED_HW_ERR_MFW_RESP_FAIL: 1139 case QED_HW_ERR_HW_ATTN: 1140 case QED_HW_ERR_DMAE_FAIL: 1141 case QED_HW_ERR_RAMROD_FAIL: 1142 case QED_HW_ERR_FW_ASSERT: 1143 /* Prevent HW attentions from being reasserted */ 1144 if (test_bit(QEDI_ERR_ATTN_CLR_EN, &qedi->qedi_err_flags)) 1145 qedi_ops->common->attn_clr_enable(qedi->cdev, true); 1146 1147 if (err_type == QED_HW_ERR_RAMROD_FAIL && 1148 test_bit(QEDI_ERR_IS_RECOVERABLE, &qedi->qedi_err_flags)) 1149 qedi_ops->common->recovery_process(qedi->cdev); 1150 1151 break; 1152 default: 1153 break; 1154 } 1155 } 1156 1157 static void qedi_schedule_recovery_handler(void *dev) 1158 { 1159 struct qedi_ctx *qedi = dev; 1160 1161 QEDI_ERR(&qedi->dbg_ctx, "Recovery handler scheduled.\n"); 1162 1163 if (test_and_set_bit(QEDI_IN_RECOVERY, &qedi->flags)) 1164 return; 1165 1166 atomic_set(&qedi->link_state, QEDI_LINK_DOWN); 1167 1168 schedule_delayed_work(&qedi->recovery_work, 0); 1169 } 1170 1171 static void qedi_set_conn_recovery(struct iscsi_cls_session *cls_session) 1172 { 1173 struct iscsi_session *session = cls_session->dd_data; 1174 struct iscsi_conn *conn = session->leadconn; 1175 struct qedi_conn *qedi_conn = conn->dd_data; 1176 1177 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1178 } 1179 1180 static void qedi_link_update(void *dev, struct qed_link_output *link) 1181 { 1182 struct qedi_ctx *qedi = (struct qedi_ctx *)dev; 1183 1184 if (link->link_up) { 1185 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n"); 1186 atomic_set(&qedi->link_state, QEDI_LINK_UP); 1187 } else { 1188 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1189 "Link Down event.\n"); 1190 atomic_set(&qedi->link_state, QEDI_LINK_DOWN); 1191 iscsi_host_for_each_session(qedi->shost, qedi_set_conn_recovery); 1192 } 1193 } 1194 1195 static struct qed_iscsi_cb_ops qedi_cb_ops = { 1196 { 1197 .link_update = qedi_link_update, 1198 .schedule_recovery_handler = qedi_schedule_recovery_handler, 1199 .schedule_hw_err_handler = qedi_schedule_hw_err_handler, 1200 .get_protocol_tlv_data = qedi_get_protocol_tlv_data, 1201 .get_generic_tlv_data = qedi_get_generic_tlv_data, 1202 } 1203 }; 1204 1205 static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe, 1206 u16 que_idx, struct qedi_percpu_s *p) 1207 { 1208 struct qedi_work *qedi_work; 1209 struct qedi_conn *q_conn; 1210 struct qedi_cmd *qedi_cmd; 1211 u32 iscsi_cid; 1212 int rc = 0; 1213 1214 iscsi_cid = cqe->cqe_common.conn_id; 1215 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid]; 1216 if (!q_conn) { 1217 QEDI_WARN(&qedi->dbg_ctx, 1218 "Session no longer exists for cid=0x%x!!\n", 1219 iscsi_cid); 1220 return -1; 1221 } 1222 1223 switch (cqe->cqe_common.cqe_type) { 1224 case ISCSI_CQE_TYPE_SOLICITED: 1225 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE: 1226 qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid); 1227 if (!qedi_cmd) { 1228 rc = -1; 1229 break; 1230 } 1231 INIT_LIST_HEAD(&qedi_cmd->cqe_work.list); 1232 qedi_cmd->cqe_work.qedi = qedi; 1233 memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe)); 1234 qedi_cmd->cqe_work.que_idx = que_idx; 1235 qedi_cmd->cqe_work.is_solicited = true; 1236 list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list); 1237 break; 1238 case ISCSI_CQE_TYPE_UNSOLICITED: 1239 case ISCSI_CQE_TYPE_DUMMY: 1240 case ISCSI_CQE_TYPE_TASK_CLEANUP: 1241 qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC); 1242 if (!qedi_work) { 1243 rc = -1; 1244 break; 1245 } 1246 INIT_LIST_HEAD(&qedi_work->list); 1247 qedi_work->qedi = qedi; 1248 memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe)); 1249 qedi_work->que_idx = que_idx; 1250 qedi_work->is_solicited = false; 1251 list_add_tail(&qedi_work->list, &p->work_list); 1252 break; 1253 default: 1254 rc = -1; 1255 QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n"); 1256 } 1257 return rc; 1258 } 1259 1260 static bool qedi_process_completions(struct qedi_fastpath *fp) 1261 { 1262 struct qedi_ctx *qedi = fp->qedi; 1263 struct qed_sb_info *sb_info = fp->sb_info; 1264 struct status_block_e4 *sb = sb_info->sb_virt; 1265 struct qedi_percpu_s *p = NULL; 1266 struct global_queue *que; 1267 u16 prod_idx; 1268 unsigned long flags; 1269 union iscsi_cqe *cqe; 1270 int cpu; 1271 int ret; 1272 1273 /* Get the current firmware producer index */ 1274 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX]; 1275 1276 if (prod_idx >= QEDI_CQ_SIZE) 1277 prod_idx = prod_idx % QEDI_CQ_SIZE; 1278 1279 que = qedi->global_queues[fp->sb_id]; 1280 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, 1281 "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n", 1282 que, prod_idx, que->cq_cons_idx, fp->sb_id); 1283 1284 qedi->intr_cpu = fp->sb_id; 1285 cpu = smp_processor_id(); 1286 p = &per_cpu(qedi_percpu, cpu); 1287 1288 if (unlikely(!p->iothread)) 1289 WARN_ON(1); 1290 1291 spin_lock_irqsave(&p->p_work_lock, flags); 1292 while (que->cq_cons_idx != prod_idx) { 1293 cqe = &que->cq[que->cq_cons_idx]; 1294 1295 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, 1296 "cqe=%p prod_idx=%d cons_idx=%d.\n", 1297 cqe, prod_idx, que->cq_cons_idx); 1298 1299 ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p); 1300 if (ret) 1301 QEDI_WARN(&qedi->dbg_ctx, 1302 "Dropping CQE 0x%x for cid=0x%x.\n", 1303 que->cq_cons_idx, cqe->cqe_common.conn_id); 1304 1305 que->cq_cons_idx++; 1306 if (que->cq_cons_idx == QEDI_CQ_SIZE) 1307 que->cq_cons_idx = 0; 1308 } 1309 wake_up_process(p->iothread); 1310 spin_unlock_irqrestore(&p->p_work_lock, flags); 1311 1312 return true; 1313 } 1314 1315 static bool qedi_fp_has_work(struct qedi_fastpath *fp) 1316 { 1317 struct qedi_ctx *qedi = fp->qedi; 1318 struct global_queue *que; 1319 struct qed_sb_info *sb_info = fp->sb_info; 1320 struct status_block_e4 *sb = sb_info->sb_virt; 1321 u16 prod_idx; 1322 1323 barrier(); 1324 1325 /* Get the current firmware producer index */ 1326 prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX]; 1327 1328 /* Get the pointer to the global CQ this completion is on */ 1329 que = qedi->global_queues[fp->sb_id]; 1330 1331 /* prod idx wrap around uint16 */ 1332 if (prod_idx >= QEDI_CQ_SIZE) 1333 prod_idx = prod_idx % QEDI_CQ_SIZE; 1334 1335 return (que->cq_cons_idx != prod_idx); 1336 } 1337 1338 /* MSI-X fastpath handler code */ 1339 static irqreturn_t qedi_msix_handler(int irq, void *dev_id) 1340 { 1341 struct qedi_fastpath *fp = dev_id; 1342 struct qedi_ctx *qedi = fp->qedi; 1343 bool wake_io_thread = true; 1344 1345 qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0); 1346 1347 process_again: 1348 wake_io_thread = qedi_process_completions(fp); 1349 if (wake_io_thread) { 1350 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, 1351 "process already running\n"); 1352 } 1353 1354 if (!qedi_fp_has_work(fp)) 1355 qed_sb_update_sb_idx(fp->sb_info); 1356 1357 /* Check for more work */ 1358 rmb(); 1359 1360 if (!qedi_fp_has_work(fp)) 1361 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1); 1362 else 1363 goto process_again; 1364 1365 return IRQ_HANDLED; 1366 } 1367 1368 /* simd handler for MSI/INTa */ 1369 static void qedi_simd_int_handler(void *cookie) 1370 { 1371 /* Cookie is qedi_ctx struct */ 1372 struct qedi_ctx *qedi = (struct qedi_ctx *)cookie; 1373 1374 QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi); 1375 } 1376 1377 #define QEDI_SIMD_HANDLER_NUM 0 1378 static void qedi_sync_free_irqs(struct qedi_ctx *qedi) 1379 { 1380 int i; 1381 u16 idx; 1382 1383 if (qedi->int_info.msix_cnt) { 1384 for (i = 0; i < qedi->int_info.used_cnt; i++) { 1385 idx = i * qedi->dev_info.common.num_hwfns + 1386 qedi_ops->common->get_affin_hwfn_idx(qedi->cdev); 1387 1388 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1389 "Freeing IRQ #%d vector_idx=%d.\n", i, idx); 1390 1391 synchronize_irq(qedi->int_info.msix[idx].vector); 1392 irq_set_affinity_hint(qedi->int_info.msix[idx].vector, 1393 NULL); 1394 free_irq(qedi->int_info.msix[idx].vector, 1395 &qedi->fp_array[i]); 1396 } 1397 } else { 1398 qedi_ops->common->simd_handler_clean(qedi->cdev, 1399 QEDI_SIMD_HANDLER_NUM); 1400 } 1401 1402 qedi->int_info.used_cnt = 0; 1403 qedi_ops->common->set_fp_int(qedi->cdev, 0); 1404 } 1405 1406 static int qedi_request_msix_irq(struct qedi_ctx *qedi) 1407 { 1408 int i, rc, cpu; 1409 u16 idx; 1410 1411 cpu = cpumask_first(cpu_online_mask); 1412 for (i = 0; i < qedi->msix_count; i++) { 1413 idx = i * qedi->dev_info.common.num_hwfns + 1414 qedi_ops->common->get_affin_hwfn_idx(qedi->cdev); 1415 1416 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1417 "dev_info: num_hwfns=%d affin_hwfn_idx=%d.\n", 1418 qedi->dev_info.common.num_hwfns, 1419 qedi_ops->common->get_affin_hwfn_idx(qedi->cdev)); 1420 1421 rc = request_irq(qedi->int_info.msix[idx].vector, 1422 qedi_msix_handler, 0, "qedi", 1423 &qedi->fp_array[i]); 1424 if (rc) { 1425 QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n"); 1426 qedi_sync_free_irqs(qedi); 1427 return rc; 1428 } 1429 qedi->int_info.used_cnt++; 1430 rc = irq_set_affinity_hint(qedi->int_info.msix[idx].vector, 1431 get_cpu_mask(cpu)); 1432 cpu = cpumask_next(cpu, cpu_online_mask); 1433 } 1434 1435 return 0; 1436 } 1437 1438 static int qedi_setup_int(struct qedi_ctx *qedi) 1439 { 1440 int rc = 0; 1441 1442 rc = qedi_ops->common->set_fp_int(qedi->cdev, qedi->num_queues); 1443 if (rc < 0) 1444 goto exit_setup_int; 1445 1446 qedi->msix_count = rc; 1447 1448 rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info); 1449 if (rc) 1450 goto exit_setup_int; 1451 1452 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, 1453 "Number of msix_cnt = 0x%x num of cpus = 0x%x\n", 1454 qedi->int_info.msix_cnt, num_online_cpus()); 1455 1456 if (qedi->int_info.msix_cnt) { 1457 rc = qedi_request_msix_irq(qedi); 1458 goto exit_setup_int; 1459 } else { 1460 qedi_ops->common->simd_handler_config(qedi->cdev, &qedi, 1461 QEDI_SIMD_HANDLER_NUM, 1462 qedi_simd_int_handler); 1463 qedi->int_info.used_cnt = 1; 1464 } 1465 1466 exit_setup_int: 1467 return rc; 1468 } 1469 1470 static void qedi_free_nvm_iscsi_cfg(struct qedi_ctx *qedi) 1471 { 1472 if (qedi->iscsi_image) 1473 dma_free_coherent(&qedi->pdev->dev, 1474 sizeof(struct qedi_nvm_iscsi_image), 1475 qedi->iscsi_image, qedi->nvm_buf_dma); 1476 } 1477 1478 static int qedi_alloc_nvm_iscsi_cfg(struct qedi_ctx *qedi) 1479 { 1480 qedi->iscsi_image = dma_alloc_coherent(&qedi->pdev->dev, 1481 sizeof(struct qedi_nvm_iscsi_image), 1482 &qedi->nvm_buf_dma, GFP_KERNEL); 1483 if (!qedi->iscsi_image) { 1484 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate NVM BUF.\n"); 1485 return -ENOMEM; 1486 } 1487 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1488 "NVM BUF addr=0x%p dma=0x%llx.\n", qedi->iscsi_image, 1489 qedi->nvm_buf_dma); 1490 1491 return 0; 1492 } 1493 1494 static void qedi_free_bdq(struct qedi_ctx *qedi) 1495 { 1496 int i; 1497 1498 if (qedi->bdq_pbl_list) 1499 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 1500 qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma); 1501 1502 if (qedi->bdq_pbl) 1503 dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size, 1504 qedi->bdq_pbl, qedi->bdq_pbl_dma); 1505 1506 for (i = 0; i < QEDI_BDQ_NUM; i++) { 1507 if (qedi->bdq[i].buf_addr) { 1508 dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE, 1509 qedi->bdq[i].buf_addr, 1510 qedi->bdq[i].buf_dma); 1511 } 1512 } 1513 } 1514 1515 static void qedi_free_global_queues(struct qedi_ctx *qedi) 1516 { 1517 int i; 1518 struct global_queue **gl = qedi->global_queues; 1519 1520 for (i = 0; i < qedi->num_queues; i++) { 1521 if (!gl[i]) 1522 continue; 1523 1524 if (gl[i]->cq) 1525 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size, 1526 gl[i]->cq, gl[i]->cq_dma); 1527 if (gl[i]->cq_pbl) 1528 dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size, 1529 gl[i]->cq_pbl, gl[i]->cq_pbl_dma); 1530 1531 kfree(gl[i]); 1532 } 1533 qedi_free_bdq(qedi); 1534 qedi_free_nvm_iscsi_cfg(qedi); 1535 } 1536 1537 static int qedi_alloc_bdq(struct qedi_ctx *qedi) 1538 { 1539 int i; 1540 struct scsi_bd *pbl; 1541 u64 *list; 1542 dma_addr_t page; 1543 1544 /* Alloc dma memory for BDQ buffers */ 1545 for (i = 0; i < QEDI_BDQ_NUM; i++) { 1546 qedi->bdq[i].buf_addr = 1547 dma_alloc_coherent(&qedi->pdev->dev, 1548 QEDI_BDQ_BUF_SIZE, 1549 &qedi->bdq[i].buf_dma, 1550 GFP_KERNEL); 1551 if (!qedi->bdq[i].buf_addr) { 1552 QEDI_ERR(&qedi->dbg_ctx, 1553 "Could not allocate BDQ buffer %d.\n", i); 1554 return -ENOMEM; 1555 } 1556 } 1557 1558 /* Alloc dma memory for BDQ page buffer list */ 1559 qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd); 1560 qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, QEDI_PAGE_SIZE); 1561 qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd); 1562 1563 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n", 1564 qedi->rq_num_entries); 1565 1566 qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev, 1567 qedi->bdq_pbl_mem_size, 1568 &qedi->bdq_pbl_dma, GFP_KERNEL); 1569 if (!qedi->bdq_pbl) { 1570 QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n"); 1571 return -ENOMEM; 1572 } 1573 1574 /* 1575 * Populate BDQ PBL with physical and virtual address of individual 1576 * BDQ buffers 1577 */ 1578 pbl = (struct scsi_bd *)qedi->bdq_pbl; 1579 for (i = 0; i < QEDI_BDQ_NUM; i++) { 1580 pbl->address.hi = 1581 cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma)); 1582 pbl->address.lo = 1583 cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma)); 1584 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1585 "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n", 1586 pbl, pbl->address.hi, pbl->address.lo, i); 1587 pbl->opaque.iscsi_opaque.reserved_zero[0] = 0; 1588 pbl->opaque.iscsi_opaque.reserved_zero[1] = 0; 1589 pbl->opaque.iscsi_opaque.reserved_zero[2] = 0; 1590 pbl->opaque.iscsi_opaque.opaque = cpu_to_le16(i); 1591 pbl++; 1592 } 1593 1594 /* Allocate list of PBL pages */ 1595 qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev, 1596 QEDI_PAGE_SIZE, 1597 &qedi->bdq_pbl_list_dma, 1598 GFP_KERNEL); 1599 if (!qedi->bdq_pbl_list) { 1600 QEDI_ERR(&qedi->dbg_ctx, 1601 "Could not allocate list of PBL pages.\n"); 1602 return -ENOMEM; 1603 } 1604 1605 /* 1606 * Now populate PBL list with pages that contain pointers to the 1607 * individual buffers. 1608 */ 1609 qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / 1610 QEDI_PAGE_SIZE; 1611 list = (u64 *)qedi->bdq_pbl_list; 1612 page = qedi->bdq_pbl_list_dma; 1613 for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) { 1614 *list = qedi->bdq_pbl_dma; 1615 list++; 1616 page += QEDI_PAGE_SIZE; 1617 } 1618 1619 return 0; 1620 } 1621 1622 static int qedi_alloc_global_queues(struct qedi_ctx *qedi) 1623 { 1624 u32 *list; 1625 int i; 1626 int status = 0, rc; 1627 u32 *pbl; 1628 dma_addr_t page; 1629 int num_pages; 1630 1631 /* 1632 * Number of global queues (CQ / RQ). This should 1633 * be <= number of available MSIX vectors for the PF 1634 */ 1635 if (!qedi->num_queues) { 1636 QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n"); 1637 return 1; 1638 } 1639 1640 /* Make sure we allocated the PBL that will contain the physical 1641 * addresses of our queues 1642 */ 1643 if (!qedi->p_cpuq) { 1644 status = 1; 1645 goto mem_alloc_failure; 1646 } 1647 1648 qedi->global_queues = kzalloc((sizeof(struct global_queue *) * 1649 qedi->num_queues), GFP_KERNEL); 1650 if (!qedi->global_queues) { 1651 QEDI_ERR(&qedi->dbg_ctx, 1652 "Unable to allocate global queues array ptr memory\n"); 1653 return -ENOMEM; 1654 } 1655 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, 1656 "qedi->global_queues=%p.\n", qedi->global_queues); 1657 1658 /* Allocate DMA coherent buffers for BDQ */ 1659 rc = qedi_alloc_bdq(qedi); 1660 if (rc) 1661 goto mem_alloc_failure; 1662 1663 /* Allocate DMA coherent buffers for NVM_ISCSI_CFG */ 1664 rc = qedi_alloc_nvm_iscsi_cfg(qedi); 1665 if (rc) 1666 goto mem_alloc_failure; 1667 1668 /* Allocate a CQ and an associated PBL for each MSI-X 1669 * vector. 1670 */ 1671 for (i = 0; i < qedi->num_queues; i++) { 1672 qedi->global_queues[i] = 1673 kzalloc(sizeof(*qedi->global_queues[0]), 1674 GFP_KERNEL); 1675 if (!qedi->global_queues[i]) { 1676 QEDI_ERR(&qedi->dbg_ctx, 1677 "Unable to allocation global queue %d.\n", i); 1678 goto mem_alloc_failure; 1679 } 1680 1681 qedi->global_queues[i]->cq_mem_size = 1682 (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe); 1683 qedi->global_queues[i]->cq_mem_size = 1684 (qedi->global_queues[i]->cq_mem_size + 1685 (QEDI_PAGE_SIZE - 1)); 1686 1687 qedi->global_queues[i]->cq_pbl_size = 1688 (qedi->global_queues[i]->cq_mem_size / 1689 QEDI_PAGE_SIZE) * sizeof(void *); 1690 qedi->global_queues[i]->cq_pbl_size = 1691 (qedi->global_queues[i]->cq_pbl_size + 1692 (QEDI_PAGE_SIZE - 1)); 1693 1694 qedi->global_queues[i]->cq = dma_alloc_coherent(&qedi->pdev->dev, 1695 qedi->global_queues[i]->cq_mem_size, 1696 &qedi->global_queues[i]->cq_dma, 1697 GFP_KERNEL); 1698 1699 if (!qedi->global_queues[i]->cq) { 1700 QEDI_WARN(&qedi->dbg_ctx, 1701 "Could not allocate cq.\n"); 1702 status = -ENOMEM; 1703 goto mem_alloc_failure; 1704 } 1705 qedi->global_queues[i]->cq_pbl = dma_alloc_coherent(&qedi->pdev->dev, 1706 qedi->global_queues[i]->cq_pbl_size, 1707 &qedi->global_queues[i]->cq_pbl_dma, 1708 GFP_KERNEL); 1709 1710 if (!qedi->global_queues[i]->cq_pbl) { 1711 QEDI_WARN(&qedi->dbg_ctx, 1712 "Could not allocate cq PBL.\n"); 1713 status = -ENOMEM; 1714 goto mem_alloc_failure; 1715 } 1716 1717 /* Create PBL */ 1718 num_pages = qedi->global_queues[i]->cq_mem_size / 1719 QEDI_PAGE_SIZE; 1720 page = qedi->global_queues[i]->cq_dma; 1721 pbl = (u32 *)qedi->global_queues[i]->cq_pbl; 1722 1723 while (num_pages--) { 1724 *pbl = (u32)page; 1725 pbl++; 1726 *pbl = (u32)((u64)page >> 32); 1727 pbl++; 1728 page += QEDI_PAGE_SIZE; 1729 } 1730 } 1731 1732 list = (u32 *)qedi->p_cpuq; 1733 1734 /* 1735 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer, 1736 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc. Each PBL pointer points 1737 * to the physical address which contains an array of pointers to the 1738 * physical addresses of the specific queue pages. 1739 */ 1740 for (i = 0; i < qedi->num_queues; i++) { 1741 *list = (u32)qedi->global_queues[i]->cq_pbl_dma; 1742 list++; 1743 *list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32); 1744 list++; 1745 1746 *list = (u32)0; 1747 list++; 1748 *list = (u32)((u64)0 >> 32); 1749 list++; 1750 } 1751 1752 return 0; 1753 1754 mem_alloc_failure: 1755 qedi_free_global_queues(qedi); 1756 return status; 1757 } 1758 1759 int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep) 1760 { 1761 int rval = 0; 1762 u32 *pbl; 1763 dma_addr_t page; 1764 int num_pages; 1765 1766 if (!ep) 1767 return -EIO; 1768 1769 /* Calculate appropriate queue and PBL sizes */ 1770 ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe); 1771 ep->sq_mem_size += QEDI_PAGE_SIZE - 1; 1772 1773 ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *); 1774 ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE; 1775 1776 ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size, 1777 &ep->sq_dma, GFP_KERNEL); 1778 if (!ep->sq) { 1779 QEDI_WARN(&qedi->dbg_ctx, 1780 "Could not allocate send queue.\n"); 1781 rval = -ENOMEM; 1782 goto out; 1783 } 1784 ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size, 1785 &ep->sq_pbl_dma, GFP_KERNEL); 1786 if (!ep->sq_pbl) { 1787 QEDI_WARN(&qedi->dbg_ctx, 1788 "Could not allocate send queue PBL.\n"); 1789 rval = -ENOMEM; 1790 goto out_free_sq; 1791 } 1792 1793 /* Create PBL */ 1794 num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE; 1795 page = ep->sq_dma; 1796 pbl = (u32 *)ep->sq_pbl; 1797 1798 while (num_pages--) { 1799 *pbl = (u32)page; 1800 pbl++; 1801 *pbl = (u32)((u64)page >> 32); 1802 pbl++; 1803 page += QEDI_PAGE_SIZE; 1804 } 1805 1806 return rval; 1807 1808 out_free_sq: 1809 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq, 1810 ep->sq_dma); 1811 out: 1812 return rval; 1813 } 1814 1815 void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep) 1816 { 1817 if (ep->sq_pbl) 1818 dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl, 1819 ep->sq_pbl_dma); 1820 if (ep->sq) 1821 dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq, 1822 ep->sq_dma); 1823 } 1824 1825 int qedi_get_task_idx(struct qedi_ctx *qedi) 1826 { 1827 s16 tmp_idx; 1828 1829 again: 1830 tmp_idx = find_first_zero_bit(qedi->task_idx_map, 1831 MAX_ISCSI_TASK_ENTRIES); 1832 1833 if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) { 1834 QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n"); 1835 tmp_idx = -1; 1836 goto err_idx; 1837 } 1838 1839 if (test_and_set_bit(tmp_idx, qedi->task_idx_map)) 1840 goto again; 1841 1842 err_idx: 1843 return tmp_idx; 1844 } 1845 1846 void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx) 1847 { 1848 if (!test_and_clear_bit(idx, qedi->task_idx_map)) 1849 QEDI_ERR(&qedi->dbg_ctx, 1850 "FW task context, already cleared, tid=0x%x\n", idx); 1851 } 1852 1853 void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt, 1854 struct qedi_cmd *cmd) 1855 { 1856 qedi->itt_map[tid].itt = proto_itt; 1857 qedi->itt_map[tid].p_cmd = cmd; 1858 1859 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1860 "update itt map tid=0x%x, with proto itt=0x%x\n", tid, 1861 qedi->itt_map[tid].itt); 1862 } 1863 1864 void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid) 1865 { 1866 u16 i; 1867 1868 for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) { 1869 if (qedi->itt_map[i].itt == itt) { 1870 *tid = i; 1871 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1872 "Ref itt=0x%x, found at tid=0x%x\n", 1873 itt, *tid); 1874 return; 1875 } 1876 } 1877 1878 WARN_ON(1); 1879 } 1880 1881 void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt) 1882 { 1883 *proto_itt = qedi->itt_map[tid].itt; 1884 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1885 "Get itt map tid [0x%x with proto itt[0x%x]", 1886 tid, *proto_itt); 1887 } 1888 1889 struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid) 1890 { 1891 struct qedi_cmd *cmd = NULL; 1892 1893 if (tid >= MAX_ISCSI_TASK_ENTRIES) 1894 return NULL; 1895 1896 cmd = qedi->itt_map[tid].p_cmd; 1897 if (cmd->task_id != tid) 1898 return NULL; 1899 1900 qedi->itt_map[tid].p_cmd = NULL; 1901 1902 return cmd; 1903 } 1904 1905 static int qedi_alloc_itt(struct qedi_ctx *qedi) 1906 { 1907 qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES, 1908 sizeof(struct qedi_itt_map), GFP_KERNEL); 1909 if (!qedi->itt_map) { 1910 QEDI_ERR(&qedi->dbg_ctx, 1911 "Unable to allocate itt map array memory\n"); 1912 return -ENOMEM; 1913 } 1914 return 0; 1915 } 1916 1917 static void qedi_free_itt(struct qedi_ctx *qedi) 1918 { 1919 kfree(qedi->itt_map); 1920 } 1921 1922 static struct qed_ll2_cb_ops qedi_ll2_cb_ops = { 1923 .rx_cb = qedi_ll2_rx, 1924 .tx_cb = NULL, 1925 }; 1926 1927 static int qedi_percpu_io_thread(void *arg) 1928 { 1929 struct qedi_percpu_s *p = arg; 1930 struct qedi_work *work, *tmp; 1931 unsigned long flags; 1932 LIST_HEAD(work_list); 1933 1934 set_user_nice(current, -20); 1935 1936 while (!kthread_should_stop()) { 1937 spin_lock_irqsave(&p->p_work_lock, flags); 1938 while (!list_empty(&p->work_list)) { 1939 list_splice_init(&p->work_list, &work_list); 1940 spin_unlock_irqrestore(&p->p_work_lock, flags); 1941 1942 list_for_each_entry_safe(work, tmp, &work_list, list) { 1943 list_del_init(&work->list); 1944 qedi_fp_process_cqes(work); 1945 if (!work->is_solicited) 1946 kfree(work); 1947 } 1948 cond_resched(); 1949 spin_lock_irqsave(&p->p_work_lock, flags); 1950 } 1951 set_current_state(TASK_INTERRUPTIBLE); 1952 spin_unlock_irqrestore(&p->p_work_lock, flags); 1953 schedule(); 1954 } 1955 __set_current_state(TASK_RUNNING); 1956 1957 return 0; 1958 } 1959 1960 static int qedi_cpu_online(unsigned int cpu) 1961 { 1962 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu); 1963 struct task_struct *thread; 1964 1965 thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p, 1966 cpu_to_node(cpu), 1967 "qedi_thread/%d", cpu); 1968 if (IS_ERR(thread)) 1969 return PTR_ERR(thread); 1970 1971 kthread_bind(thread, cpu); 1972 p->iothread = thread; 1973 wake_up_process(thread); 1974 return 0; 1975 } 1976 1977 static int qedi_cpu_offline(unsigned int cpu) 1978 { 1979 struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu); 1980 struct qedi_work *work, *tmp; 1981 struct task_struct *thread; 1982 1983 spin_lock_bh(&p->p_work_lock); 1984 thread = p->iothread; 1985 p->iothread = NULL; 1986 1987 list_for_each_entry_safe(work, tmp, &p->work_list, list) { 1988 list_del_init(&work->list); 1989 qedi_fp_process_cqes(work); 1990 if (!work->is_solicited) 1991 kfree(work); 1992 } 1993 1994 spin_unlock_bh(&p->p_work_lock); 1995 if (thread) 1996 kthread_stop(thread); 1997 return 0; 1998 } 1999 2000 void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu) 2001 { 2002 struct qed_ll2_params params; 2003 2004 qedi_recover_all_conns(qedi); 2005 2006 qedi_ops->ll2->stop(qedi->cdev); 2007 qedi_ll2_free_skbs(qedi); 2008 2009 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n", 2010 qedi->ll2_mtu, mtu); 2011 memset(¶ms, 0, sizeof(params)); 2012 qedi->ll2_mtu = mtu; 2013 params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN; 2014 params.drop_ttl0_packets = 0; 2015 params.rx_vlan_stripping = 1; 2016 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac); 2017 qedi_ops->ll2->start(qedi->cdev, ¶ms); 2018 } 2019 2020 /* 2021 * qedi_get_nvram_block: - Scan through the iSCSI NVRAM block (while accounting 2022 * for gaps) for the matching absolute-pf-id of the QEDI device. 2023 */ 2024 static struct nvm_iscsi_block * 2025 qedi_get_nvram_block(struct qedi_ctx *qedi) 2026 { 2027 int i; 2028 u8 pf; 2029 u32 flags; 2030 struct nvm_iscsi_block *block; 2031 2032 pf = qedi->dev_info.common.abs_pf_id; 2033 block = &qedi->iscsi_image->iscsi_cfg.block[0]; 2034 for (i = 0; i < NUM_OF_ISCSI_PF_SUPPORTED; i++, block++) { 2035 flags = ((block->id) & NVM_ISCSI_CFG_BLK_CTRL_FLAG_MASK) >> 2036 NVM_ISCSI_CFG_BLK_CTRL_FLAG_OFFSET; 2037 if (flags & (NVM_ISCSI_CFG_BLK_CTRL_FLAG_IS_NOT_EMPTY | 2038 NVM_ISCSI_CFG_BLK_CTRL_FLAG_PF_MAPPED) && 2039 (pf == (block->id & NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_MASK) 2040 >> NVM_ISCSI_CFG_BLK_MAPPED_PF_ID_OFFSET)) 2041 return block; 2042 } 2043 return NULL; 2044 } 2045 2046 static ssize_t qedi_show_boot_eth_info(void *data, int type, char *buf) 2047 { 2048 struct qedi_ctx *qedi = data; 2049 struct nvm_iscsi_initiator *initiator; 2050 int rc = 1; 2051 u32 ipv6_en, dhcp_en, ip_len; 2052 struct nvm_iscsi_block *block; 2053 char *fmt, *ip, *sub, *gw; 2054 2055 block = qedi_get_nvram_block(qedi); 2056 if (!block) 2057 return 0; 2058 2059 initiator = &block->initiator; 2060 ipv6_en = block->generic.ctrl_flags & 2061 NVM_ISCSI_CFG_GEN_IPV6_ENABLED; 2062 dhcp_en = block->generic.ctrl_flags & 2063 NVM_ISCSI_CFG_GEN_DHCP_TCPIP_CONFIG_ENABLED; 2064 /* Static IP assignments. */ 2065 fmt = ipv6_en ? "%pI6\n" : "%pI4\n"; 2066 ip = ipv6_en ? initiator->ipv6.addr.byte : initiator->ipv4.addr.byte; 2067 ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN; 2068 sub = ipv6_en ? initiator->ipv6.subnet_mask.byte : 2069 initiator->ipv4.subnet_mask.byte; 2070 gw = ipv6_en ? initiator->ipv6.gateway.byte : 2071 initiator->ipv4.gateway.byte; 2072 /* DHCP IP adjustments. */ 2073 fmt = dhcp_en ? "%s\n" : fmt; 2074 if (dhcp_en) { 2075 ip = ipv6_en ? "0::0" : "0.0.0.0"; 2076 sub = ip; 2077 gw = ip; 2078 ip_len = ipv6_en ? 5 : 8; 2079 } 2080 2081 switch (type) { 2082 case ISCSI_BOOT_ETH_IP_ADDR: 2083 rc = snprintf(buf, ip_len, fmt, ip); 2084 break; 2085 case ISCSI_BOOT_ETH_SUBNET_MASK: 2086 rc = snprintf(buf, ip_len, fmt, sub); 2087 break; 2088 case ISCSI_BOOT_ETH_GATEWAY: 2089 rc = snprintf(buf, ip_len, fmt, gw); 2090 break; 2091 case ISCSI_BOOT_ETH_FLAGS: 2092 rc = snprintf(buf, 3, "%hhd\n", 2093 SYSFS_FLAG_FW_SEL_BOOT); 2094 break; 2095 case ISCSI_BOOT_ETH_INDEX: 2096 rc = snprintf(buf, 3, "0\n"); 2097 break; 2098 case ISCSI_BOOT_ETH_MAC: 2099 rc = sysfs_format_mac(buf, qedi->mac, ETH_ALEN); 2100 break; 2101 case ISCSI_BOOT_ETH_VLAN: 2102 rc = snprintf(buf, 12, "%d\n", 2103 GET_FIELD2(initiator->generic_cont0, 2104 NVM_ISCSI_CFG_INITIATOR_VLAN)); 2105 break; 2106 case ISCSI_BOOT_ETH_ORIGIN: 2107 if (dhcp_en) 2108 rc = snprintf(buf, 3, "3\n"); 2109 break; 2110 default: 2111 rc = 0; 2112 break; 2113 } 2114 2115 return rc; 2116 } 2117 2118 static umode_t qedi_eth_get_attr_visibility(void *data, int type) 2119 { 2120 int rc = 1; 2121 2122 switch (type) { 2123 case ISCSI_BOOT_ETH_FLAGS: 2124 case ISCSI_BOOT_ETH_MAC: 2125 case ISCSI_BOOT_ETH_INDEX: 2126 case ISCSI_BOOT_ETH_IP_ADDR: 2127 case ISCSI_BOOT_ETH_SUBNET_MASK: 2128 case ISCSI_BOOT_ETH_GATEWAY: 2129 case ISCSI_BOOT_ETH_ORIGIN: 2130 case ISCSI_BOOT_ETH_VLAN: 2131 rc = 0444; 2132 break; 2133 default: 2134 rc = 0; 2135 break; 2136 } 2137 return rc; 2138 } 2139 2140 static ssize_t qedi_show_boot_ini_info(void *data, int type, char *buf) 2141 { 2142 struct qedi_ctx *qedi = data; 2143 struct nvm_iscsi_initiator *initiator; 2144 int rc; 2145 struct nvm_iscsi_block *block; 2146 2147 block = qedi_get_nvram_block(qedi); 2148 if (!block) 2149 return 0; 2150 2151 initiator = &block->initiator; 2152 2153 switch (type) { 2154 case ISCSI_BOOT_INI_INITIATOR_NAME: 2155 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN, 2156 initiator->initiator_name.byte); 2157 break; 2158 default: 2159 rc = 0; 2160 break; 2161 } 2162 return rc; 2163 } 2164 2165 static umode_t qedi_ini_get_attr_visibility(void *data, int type) 2166 { 2167 int rc; 2168 2169 switch (type) { 2170 case ISCSI_BOOT_INI_INITIATOR_NAME: 2171 rc = 0444; 2172 break; 2173 default: 2174 rc = 0; 2175 break; 2176 } 2177 return rc; 2178 } 2179 2180 static ssize_t 2181 qedi_show_boot_tgt_info(struct qedi_ctx *qedi, int type, 2182 char *buf, enum qedi_nvm_tgts idx) 2183 { 2184 int rc = 1; 2185 u32 ctrl_flags, ipv6_en, chap_en, mchap_en, ip_len; 2186 struct nvm_iscsi_block *block; 2187 char *chap_name, *chap_secret; 2188 char *mchap_name, *mchap_secret; 2189 2190 block = qedi_get_nvram_block(qedi); 2191 if (!block) 2192 goto exit_show_tgt_info; 2193 2194 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT, 2195 "Port:%d, tgt_idx:%d\n", 2196 GET_FIELD2(block->id, NVM_ISCSI_CFG_BLK_MAPPED_PF_ID), idx); 2197 2198 ctrl_flags = block->target[idx].ctrl_flags & 2199 NVM_ISCSI_CFG_TARGET_ENABLED; 2200 2201 if (!ctrl_flags) { 2202 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_EVT, 2203 "Target disabled\n"); 2204 goto exit_show_tgt_info; 2205 } 2206 2207 ipv6_en = block->generic.ctrl_flags & 2208 NVM_ISCSI_CFG_GEN_IPV6_ENABLED; 2209 ip_len = ipv6_en ? IPV6_LEN : IPV4_LEN; 2210 chap_en = block->generic.ctrl_flags & 2211 NVM_ISCSI_CFG_GEN_CHAP_ENABLED; 2212 chap_name = chap_en ? block->initiator.chap_name.byte : NULL; 2213 chap_secret = chap_en ? block->initiator.chap_password.byte : NULL; 2214 2215 mchap_en = block->generic.ctrl_flags & 2216 NVM_ISCSI_CFG_GEN_CHAP_MUTUAL_ENABLED; 2217 mchap_name = mchap_en ? block->target[idx].chap_name.byte : NULL; 2218 mchap_secret = mchap_en ? block->target[idx].chap_password.byte : NULL; 2219 2220 switch (type) { 2221 case ISCSI_BOOT_TGT_NAME: 2222 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_ISCSI_NAME_MAX_LEN, 2223 block->target[idx].target_name.byte); 2224 break; 2225 case ISCSI_BOOT_TGT_IP_ADDR: 2226 if (ipv6_en) 2227 rc = snprintf(buf, ip_len, "%pI6\n", 2228 block->target[idx].ipv6_addr.byte); 2229 else 2230 rc = snprintf(buf, ip_len, "%pI4\n", 2231 block->target[idx].ipv4_addr.byte); 2232 break; 2233 case ISCSI_BOOT_TGT_PORT: 2234 rc = snprintf(buf, 12, "%d\n", 2235 GET_FIELD2(block->target[idx].generic_cont0, 2236 NVM_ISCSI_CFG_TARGET_TCP_PORT)); 2237 break; 2238 case ISCSI_BOOT_TGT_LUN: 2239 rc = snprintf(buf, 22, "%.*d\n", 2240 block->target[idx].lun.value[1], 2241 block->target[idx].lun.value[0]); 2242 break; 2243 case ISCSI_BOOT_TGT_CHAP_NAME: 2244 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN, 2245 chap_name); 2246 break; 2247 case ISCSI_BOOT_TGT_CHAP_SECRET: 2248 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN, 2249 chap_secret); 2250 break; 2251 case ISCSI_BOOT_TGT_REV_CHAP_NAME: 2252 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN, 2253 mchap_name); 2254 break; 2255 case ISCSI_BOOT_TGT_REV_CHAP_SECRET: 2256 rc = sprintf(buf, "%.*s\n", NVM_ISCSI_CFG_CHAP_NAME_MAX_LEN, 2257 mchap_secret); 2258 break; 2259 case ISCSI_BOOT_TGT_FLAGS: 2260 rc = snprintf(buf, 3, "%hhd\n", SYSFS_FLAG_FW_SEL_BOOT); 2261 break; 2262 case ISCSI_BOOT_TGT_NIC_ASSOC: 2263 rc = snprintf(buf, 3, "0\n"); 2264 break; 2265 default: 2266 rc = 0; 2267 break; 2268 } 2269 2270 exit_show_tgt_info: 2271 return rc; 2272 } 2273 2274 static ssize_t qedi_show_boot_tgt_pri_info(void *data, int type, char *buf) 2275 { 2276 struct qedi_ctx *qedi = data; 2277 2278 return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_PRI); 2279 } 2280 2281 static ssize_t qedi_show_boot_tgt_sec_info(void *data, int type, char *buf) 2282 { 2283 struct qedi_ctx *qedi = data; 2284 2285 return qedi_show_boot_tgt_info(qedi, type, buf, QEDI_NVM_TGT_SEC); 2286 } 2287 2288 static umode_t qedi_tgt_get_attr_visibility(void *data, int type) 2289 { 2290 int rc; 2291 2292 switch (type) { 2293 case ISCSI_BOOT_TGT_NAME: 2294 case ISCSI_BOOT_TGT_IP_ADDR: 2295 case ISCSI_BOOT_TGT_PORT: 2296 case ISCSI_BOOT_TGT_LUN: 2297 case ISCSI_BOOT_TGT_CHAP_NAME: 2298 case ISCSI_BOOT_TGT_CHAP_SECRET: 2299 case ISCSI_BOOT_TGT_REV_CHAP_NAME: 2300 case ISCSI_BOOT_TGT_REV_CHAP_SECRET: 2301 case ISCSI_BOOT_TGT_NIC_ASSOC: 2302 case ISCSI_BOOT_TGT_FLAGS: 2303 rc = 0444; 2304 break; 2305 default: 2306 rc = 0; 2307 break; 2308 } 2309 return rc; 2310 } 2311 2312 static void qedi_boot_release(void *data) 2313 { 2314 struct qedi_ctx *qedi = data; 2315 2316 scsi_host_put(qedi->shost); 2317 } 2318 2319 static int qedi_get_boot_info(struct qedi_ctx *qedi) 2320 { 2321 int ret = 1; 2322 2323 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 2324 "Get NVM iSCSI CFG image\n"); 2325 ret = qedi_ops->common->nvm_get_image(qedi->cdev, 2326 QED_NVM_IMAGE_ISCSI_CFG, 2327 (char *)qedi->iscsi_image, 2328 sizeof(struct qedi_nvm_iscsi_image)); 2329 if (ret) 2330 QEDI_ERR(&qedi->dbg_ctx, 2331 "Could not get NVM image. ret = %d\n", ret); 2332 2333 return ret; 2334 } 2335 2336 static int qedi_setup_boot_info(struct qedi_ctx *qedi) 2337 { 2338 struct iscsi_boot_kobj *boot_kobj; 2339 2340 if (qedi_get_boot_info(qedi)) 2341 return -EPERM; 2342 2343 qedi->boot_kset = iscsi_boot_create_host_kset(qedi->shost->host_no); 2344 if (!qedi->boot_kset) 2345 goto kset_free; 2346 2347 if (!scsi_host_get(qedi->shost)) 2348 goto kset_free; 2349 2350 boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 0, qedi, 2351 qedi_show_boot_tgt_pri_info, 2352 qedi_tgt_get_attr_visibility, 2353 qedi_boot_release); 2354 if (!boot_kobj) 2355 goto put_host; 2356 2357 if (!scsi_host_get(qedi->shost)) 2358 goto kset_free; 2359 2360 boot_kobj = iscsi_boot_create_target(qedi->boot_kset, 1, qedi, 2361 qedi_show_boot_tgt_sec_info, 2362 qedi_tgt_get_attr_visibility, 2363 qedi_boot_release); 2364 if (!boot_kobj) 2365 goto put_host; 2366 2367 if (!scsi_host_get(qedi->shost)) 2368 goto kset_free; 2369 2370 boot_kobj = iscsi_boot_create_initiator(qedi->boot_kset, 0, qedi, 2371 qedi_show_boot_ini_info, 2372 qedi_ini_get_attr_visibility, 2373 qedi_boot_release); 2374 if (!boot_kobj) 2375 goto put_host; 2376 2377 if (!scsi_host_get(qedi->shost)) 2378 goto kset_free; 2379 2380 boot_kobj = iscsi_boot_create_ethernet(qedi->boot_kset, 0, qedi, 2381 qedi_show_boot_eth_info, 2382 qedi_eth_get_attr_visibility, 2383 qedi_boot_release); 2384 if (!boot_kobj) 2385 goto put_host; 2386 2387 return 0; 2388 2389 put_host: 2390 scsi_host_put(qedi->shost); 2391 kset_free: 2392 iscsi_boot_destroy_kset(qedi->boot_kset); 2393 return -ENOMEM; 2394 } 2395 2396 static pci_ers_result_t qedi_io_error_detected(struct pci_dev *pdev, 2397 pci_channel_state_t state) 2398 { 2399 struct qedi_ctx *qedi = pci_get_drvdata(pdev); 2400 2401 QEDI_ERR(&qedi->dbg_ctx, "%s: PCI error detected [%d]\n", 2402 __func__, state); 2403 2404 if (test_and_set_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 2405 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 2406 "Recovery already in progress.\n"); 2407 return PCI_ERS_RESULT_NONE; 2408 } 2409 2410 qedi_ops->common->recovery_process(qedi->cdev); 2411 2412 return PCI_ERS_RESULT_CAN_RECOVER; 2413 } 2414 2415 static void __qedi_remove(struct pci_dev *pdev, int mode) 2416 { 2417 struct qedi_ctx *qedi = pci_get_drvdata(pdev); 2418 int rval; 2419 u16 retry = 10; 2420 2421 if (mode == QEDI_MODE_SHUTDOWN) 2422 iscsi_host_for_each_session(qedi->shost, 2423 qedi_clear_session_ctx); 2424 2425 if (mode == QEDI_MODE_NORMAL || mode == QEDI_MODE_SHUTDOWN) { 2426 if (qedi->tmf_thread) { 2427 flush_workqueue(qedi->tmf_thread); 2428 destroy_workqueue(qedi->tmf_thread); 2429 qedi->tmf_thread = NULL; 2430 } 2431 2432 if (qedi->offload_thread) { 2433 flush_workqueue(qedi->offload_thread); 2434 destroy_workqueue(qedi->offload_thread); 2435 qedi->offload_thread = NULL; 2436 } 2437 } 2438 2439 #ifdef CONFIG_DEBUG_FS 2440 qedi_dbg_host_exit(&qedi->dbg_ctx); 2441 #endif 2442 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) 2443 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0); 2444 2445 qedi_sync_free_irqs(qedi); 2446 2447 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) { 2448 while (retry--) { 2449 rval = qedi_ops->stop(qedi->cdev); 2450 if (rval < 0) 2451 msleep(1000); 2452 else 2453 break; 2454 } 2455 qedi_ops->ll2->stop(qedi->cdev); 2456 } 2457 2458 qedi_free_iscsi_pf_param(qedi); 2459 2460 rval = qedi_ops->common->update_drv_state(qedi->cdev, false); 2461 if (rval) 2462 QEDI_ERR(&qedi->dbg_ctx, "Failed to send drv state to MFW\n"); 2463 2464 if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) { 2465 qedi_ops->common->slowpath_stop(qedi->cdev); 2466 qedi_ops->common->remove(qedi->cdev); 2467 } 2468 2469 qedi_destroy_fp(qedi); 2470 2471 if (mode == QEDI_MODE_NORMAL || mode == QEDI_MODE_SHUTDOWN) { 2472 qedi_release_cid_que(qedi); 2473 qedi_cm_free_mem(qedi); 2474 qedi_free_uio(qedi->udev); 2475 qedi_free_itt(qedi); 2476 2477 if (qedi->ll2_recv_thread) { 2478 kthread_stop(qedi->ll2_recv_thread); 2479 qedi->ll2_recv_thread = NULL; 2480 } 2481 qedi_ll2_free_skbs(qedi); 2482 2483 if (qedi->boot_kset) 2484 iscsi_boot_destroy_kset(qedi->boot_kset); 2485 2486 iscsi_host_remove(qedi->shost); 2487 iscsi_host_free(qedi->shost); 2488 } 2489 } 2490 2491 static void qedi_board_disable_work(struct work_struct *work) 2492 { 2493 struct qedi_ctx *qedi = 2494 container_of(work, struct qedi_ctx, 2495 board_disable_work.work); 2496 2497 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 2498 "Fan failure, Unloading firmware context.\n"); 2499 2500 if (test_and_set_bit(QEDI_IN_SHUTDOWN, &qedi->flags)) 2501 return; 2502 2503 __qedi_remove(qedi->pdev, QEDI_MODE_SHUTDOWN); 2504 } 2505 2506 static void qedi_shutdown(struct pci_dev *pdev) 2507 { 2508 struct qedi_ctx *qedi = pci_get_drvdata(pdev); 2509 2510 QEDI_ERR(&qedi->dbg_ctx, "%s: Shutdown qedi\n", __func__); 2511 if (test_and_set_bit(QEDI_IN_SHUTDOWN, &qedi->flags)) 2512 return; 2513 __qedi_remove(pdev, QEDI_MODE_SHUTDOWN); 2514 } 2515 2516 static int __qedi_probe(struct pci_dev *pdev, int mode) 2517 { 2518 struct qedi_ctx *qedi; 2519 struct qed_ll2_params params; 2520 u8 dp_level = 0; 2521 bool is_vf = false; 2522 char host_buf[16]; 2523 struct qed_link_params link_params; 2524 struct qed_slowpath_params sp_params; 2525 struct qed_probe_params qed_params; 2526 void *task_start, *task_end; 2527 int rc; 2528 u16 retry = 10; 2529 2530 if (mode != QEDI_MODE_RECOVERY) { 2531 qedi = qedi_host_alloc(pdev); 2532 if (!qedi) { 2533 rc = -ENOMEM; 2534 goto exit_probe; 2535 } 2536 } else { 2537 qedi = pci_get_drvdata(pdev); 2538 } 2539 2540 retry_probe: 2541 if (mode == QEDI_MODE_RECOVERY) 2542 msleep(2000); 2543 2544 memset(&qed_params, 0, sizeof(qed_params)); 2545 qed_params.protocol = QED_PROTOCOL_ISCSI; 2546 qed_params.dp_module = qedi_qed_debug; 2547 qed_params.dp_level = dp_level; 2548 qed_params.is_vf = is_vf; 2549 qedi->cdev = qedi_ops->common->probe(pdev, &qed_params); 2550 if (!qedi->cdev) { 2551 if (mode == QEDI_MODE_RECOVERY && retry) { 2552 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 2553 "Retry %d initialize hardware\n", retry); 2554 retry--; 2555 goto retry_probe; 2556 } 2557 2558 rc = -ENODEV; 2559 QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n"); 2560 goto free_host; 2561 } 2562 2563 set_bit(QEDI_ERR_ATTN_CLR_EN, &qedi->qedi_err_flags); 2564 set_bit(QEDI_ERR_IS_RECOVERABLE, &qedi->qedi_err_flags); 2565 atomic_set(&qedi->link_state, QEDI_LINK_DOWN); 2566 2567 rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info); 2568 if (rc) 2569 goto free_host; 2570 2571 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 2572 "dev_info: num_hwfns=%d affin_hwfn_idx=%d.\n", 2573 qedi->dev_info.common.num_hwfns, 2574 qedi_ops->common->get_affin_hwfn_idx(qedi->cdev)); 2575 2576 rc = qedi_set_iscsi_pf_param(qedi); 2577 if (rc) { 2578 rc = -ENOMEM; 2579 QEDI_ERR(&qedi->dbg_ctx, 2580 "Set iSCSI pf param fail\n"); 2581 goto free_host; 2582 } 2583 2584 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params); 2585 2586 rc = qedi_prepare_fp(qedi); 2587 if (rc) { 2588 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n"); 2589 goto free_pf_params; 2590 } 2591 2592 /* Start the Slowpath-process */ 2593 memset(&sp_params, 0, sizeof(struct qed_slowpath_params)); 2594 sp_params.int_mode = QED_INT_MODE_MSIX; 2595 sp_params.drv_major = QEDI_DRIVER_MAJOR_VER; 2596 sp_params.drv_minor = QEDI_DRIVER_MINOR_VER; 2597 sp_params.drv_rev = QEDI_DRIVER_REV_VER; 2598 sp_params.drv_eng = QEDI_DRIVER_ENG_VER; 2599 strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE); 2600 rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params); 2601 if (rc) { 2602 QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n"); 2603 goto stop_hw; 2604 } 2605 2606 /* update_pf_params needs to be called before and after slowpath 2607 * start 2608 */ 2609 qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params); 2610 2611 rc = qedi_setup_int(qedi); 2612 if (rc) 2613 goto stop_iscsi_func; 2614 2615 qedi_ops->common->set_power_state(qedi->cdev, PCI_D0); 2616 2617 /* Learn information crucial for qedi to progress */ 2618 rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info); 2619 if (rc) 2620 goto stop_iscsi_func; 2621 2622 /* Record BDQ producer doorbell addresses */ 2623 qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr; 2624 qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr; 2625 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, 2626 "BDQ primary_prod=%p secondary_prod=%p.\n", 2627 qedi->bdq_primary_prod, 2628 qedi->bdq_secondary_prod); 2629 2630 /* 2631 * We need to write the number of BDs in the BDQ we've preallocated so 2632 * the f/w will do a prefetch and we'll get an unsolicited CQE when a 2633 * packet arrives. 2634 */ 2635 qedi->bdq_prod_idx = QEDI_BDQ_NUM; 2636 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, 2637 "Writing %d to primary and secondary BDQ doorbell registers.\n", 2638 qedi->bdq_prod_idx); 2639 writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod); 2640 readw(qedi->bdq_primary_prod); 2641 writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod); 2642 readw(qedi->bdq_secondary_prod); 2643 2644 ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac); 2645 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n", 2646 qedi->mac); 2647 2648 snprintf(host_buf, sizeof(host_buf), "host_%d", qedi->shost->host_no); 2649 qedi_ops->common->set_name(qedi->cdev, host_buf); 2650 2651 qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi); 2652 2653 memset(¶ms, 0, sizeof(params)); 2654 params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN; 2655 qedi->ll2_mtu = DEF_PATH_MTU; 2656 params.drop_ttl0_packets = 0; 2657 params.rx_vlan_stripping = 1; 2658 ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac); 2659 2660 if (mode != QEDI_MODE_RECOVERY) { 2661 /* set up rx path */ 2662 INIT_LIST_HEAD(&qedi->ll2_skb_list); 2663 spin_lock_init(&qedi->ll2_lock); 2664 /* start qedi context */ 2665 spin_lock_init(&qedi->hba_lock); 2666 spin_lock_init(&qedi->task_idx_lock); 2667 mutex_init(&qedi->stats_lock); 2668 } 2669 qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi); 2670 qedi_ops->ll2->start(qedi->cdev, ¶ms); 2671 2672 if (mode != QEDI_MODE_RECOVERY) { 2673 qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread, 2674 (void *)qedi, 2675 "qedi_ll2_thread"); 2676 } 2677 2678 rc = qedi_ops->start(qedi->cdev, &qedi->tasks, 2679 qedi, qedi_iscsi_event_cb); 2680 if (rc) { 2681 rc = -ENODEV; 2682 QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n"); 2683 goto stop_slowpath; 2684 } 2685 2686 task_start = qedi_get_task_mem(&qedi->tasks, 0); 2687 task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1); 2688 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, 2689 "Task context start=%p, end=%p block_size=%u.\n", 2690 task_start, task_end, qedi->tasks.size); 2691 2692 memset(&link_params, 0, sizeof(link_params)); 2693 link_params.link_up = true; 2694 rc = qedi_ops->common->set_link(qedi->cdev, &link_params); 2695 if (rc) { 2696 QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n"); 2697 atomic_set(&qedi->link_state, QEDI_LINK_DOWN); 2698 } 2699 2700 #ifdef CONFIG_DEBUG_FS 2701 qedi_dbg_host_init(&qedi->dbg_ctx, qedi_debugfs_ops, 2702 qedi_dbg_fops); 2703 #endif 2704 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 2705 "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n", 2706 QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION, 2707 FW_REVISION_VERSION, FW_ENGINEERING_VERSION); 2708 2709 if (mode == QEDI_MODE_NORMAL) { 2710 if (iscsi_host_add(qedi->shost, &pdev->dev)) { 2711 QEDI_ERR(&qedi->dbg_ctx, 2712 "Could not add iscsi host\n"); 2713 rc = -ENOMEM; 2714 goto remove_host; 2715 } 2716 2717 /* Allocate uio buffers */ 2718 rc = qedi_alloc_uio_rings(qedi); 2719 if (rc) { 2720 QEDI_ERR(&qedi->dbg_ctx, 2721 "UIO alloc ring failed err=%d\n", rc); 2722 goto remove_host; 2723 } 2724 2725 rc = qedi_init_uio(qedi); 2726 if (rc) { 2727 QEDI_ERR(&qedi->dbg_ctx, 2728 "UIO init failed, err=%d\n", rc); 2729 goto free_uio; 2730 } 2731 2732 /* host the array on iscsi_conn */ 2733 rc = qedi_setup_cid_que(qedi); 2734 if (rc) { 2735 QEDI_ERR(&qedi->dbg_ctx, 2736 "Could not setup cid que\n"); 2737 goto free_uio; 2738 } 2739 2740 rc = qedi_cm_alloc_mem(qedi); 2741 if (rc) { 2742 QEDI_ERR(&qedi->dbg_ctx, 2743 "Could not alloc cm memory\n"); 2744 goto free_cid_que; 2745 } 2746 2747 rc = qedi_alloc_itt(qedi); 2748 if (rc) { 2749 QEDI_ERR(&qedi->dbg_ctx, 2750 "Could not alloc itt memory\n"); 2751 goto free_cid_que; 2752 } 2753 2754 sprintf(host_buf, "host_%d", qedi->shost->host_no); 2755 qedi->tmf_thread = create_singlethread_workqueue(host_buf); 2756 if (!qedi->tmf_thread) { 2757 QEDI_ERR(&qedi->dbg_ctx, 2758 "Unable to start tmf thread!\n"); 2759 rc = -ENODEV; 2760 goto free_cid_que; 2761 } 2762 2763 sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no); 2764 qedi->offload_thread = create_workqueue(host_buf); 2765 if (!qedi->offload_thread) { 2766 QEDI_ERR(&qedi->dbg_ctx, 2767 "Unable to start offload thread!\n"); 2768 rc = -ENODEV; 2769 goto free_cid_que; 2770 } 2771 2772 INIT_DELAYED_WORK(&qedi->recovery_work, qedi_recovery_handler); 2773 INIT_DELAYED_WORK(&qedi->board_disable_work, 2774 qedi_board_disable_work); 2775 2776 /* F/w needs 1st task context memory entry for performance */ 2777 set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map); 2778 atomic_set(&qedi->num_offloads, 0); 2779 2780 if (qedi_setup_boot_info(qedi)) 2781 QEDI_ERR(&qedi->dbg_ctx, 2782 "No iSCSI boot target configured\n"); 2783 2784 rc = qedi_ops->common->update_drv_state(qedi->cdev, true); 2785 if (rc) 2786 QEDI_ERR(&qedi->dbg_ctx, 2787 "Failed to send drv state to MFW\n"); 2788 2789 } 2790 2791 return 0; 2792 2793 free_cid_que: 2794 qedi_release_cid_que(qedi); 2795 free_uio: 2796 qedi_free_uio(qedi->udev); 2797 remove_host: 2798 #ifdef CONFIG_DEBUG_FS 2799 qedi_dbg_host_exit(&qedi->dbg_ctx); 2800 #endif 2801 iscsi_host_remove(qedi->shost); 2802 stop_iscsi_func: 2803 qedi_ops->stop(qedi->cdev); 2804 stop_slowpath: 2805 qedi_ops->common->slowpath_stop(qedi->cdev); 2806 stop_hw: 2807 qedi_ops->common->remove(qedi->cdev); 2808 free_pf_params: 2809 qedi_free_iscsi_pf_param(qedi); 2810 free_host: 2811 iscsi_host_free(qedi->shost); 2812 exit_probe: 2813 return rc; 2814 } 2815 2816 static void qedi_mark_conn_recovery(struct iscsi_cls_session *cls_session) 2817 { 2818 struct iscsi_session *session = cls_session->dd_data; 2819 struct iscsi_conn *conn = session->leadconn; 2820 struct qedi_conn *qedi_conn = conn->dd_data; 2821 2822 iscsi_conn_failure(qedi_conn->cls_conn->dd_data, ISCSI_ERR_CONN_FAILED); 2823 } 2824 2825 static void qedi_recovery_handler(struct work_struct *work) 2826 { 2827 struct qedi_ctx *qedi = 2828 container_of(work, struct qedi_ctx, recovery_work.work); 2829 2830 iscsi_host_for_each_session(qedi->shost, qedi_mark_conn_recovery); 2831 2832 /* Call common_ops->recovery_prolog to allow the MFW to quiesce 2833 * any PCI transactions. 2834 */ 2835 qedi_ops->common->recovery_prolog(qedi->cdev); 2836 2837 __qedi_remove(qedi->pdev, QEDI_MODE_RECOVERY); 2838 __qedi_probe(qedi->pdev, QEDI_MODE_RECOVERY); 2839 clear_bit(QEDI_IN_RECOVERY, &qedi->flags); 2840 } 2841 2842 static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id) 2843 { 2844 return __qedi_probe(pdev, QEDI_MODE_NORMAL); 2845 } 2846 2847 static void qedi_remove(struct pci_dev *pdev) 2848 { 2849 __qedi_remove(pdev, QEDI_MODE_NORMAL); 2850 } 2851 2852 static struct pci_device_id qedi_pci_tbl[] = { 2853 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) }, 2854 { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8084) }, 2855 { 0 }, 2856 }; 2857 MODULE_DEVICE_TABLE(pci, qedi_pci_tbl); 2858 2859 static enum cpuhp_state qedi_cpuhp_state; 2860 2861 static struct pci_error_handlers qedi_err_handler = { 2862 .error_detected = qedi_io_error_detected, 2863 }; 2864 2865 static struct pci_driver qedi_pci_driver = { 2866 .name = QEDI_MODULE_NAME, 2867 .id_table = qedi_pci_tbl, 2868 .probe = qedi_probe, 2869 .remove = qedi_remove, 2870 .shutdown = qedi_shutdown, 2871 .err_handler = &qedi_err_handler, 2872 }; 2873 2874 static int __init qedi_init(void) 2875 { 2876 struct qedi_percpu_s *p; 2877 int cpu, rc = 0; 2878 2879 qedi_ops = qed_get_iscsi_ops(); 2880 if (!qedi_ops) { 2881 QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n"); 2882 return -EINVAL; 2883 } 2884 2885 #ifdef CONFIG_DEBUG_FS 2886 qedi_dbg_init("qedi"); 2887 #endif 2888 2889 qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport); 2890 if (!qedi_scsi_transport) { 2891 QEDI_ERR(NULL, "Could not register qedi transport"); 2892 rc = -ENOMEM; 2893 goto exit_qedi_init_1; 2894 } 2895 2896 for_each_possible_cpu(cpu) { 2897 p = &per_cpu(qedi_percpu, cpu); 2898 INIT_LIST_HEAD(&p->work_list); 2899 spin_lock_init(&p->p_work_lock); 2900 p->iothread = NULL; 2901 } 2902 2903 rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online", 2904 qedi_cpu_online, qedi_cpu_offline); 2905 if (rc < 0) 2906 goto exit_qedi_init_2; 2907 qedi_cpuhp_state = rc; 2908 2909 rc = pci_register_driver(&qedi_pci_driver); 2910 if (rc) { 2911 QEDI_ERR(NULL, "Failed to register driver\n"); 2912 goto exit_qedi_hp; 2913 } 2914 2915 return 0; 2916 2917 exit_qedi_hp: 2918 cpuhp_remove_state(qedi_cpuhp_state); 2919 exit_qedi_init_2: 2920 iscsi_unregister_transport(&qedi_iscsi_transport); 2921 exit_qedi_init_1: 2922 #ifdef CONFIG_DEBUG_FS 2923 qedi_dbg_exit(); 2924 #endif 2925 qed_put_iscsi_ops(); 2926 return rc; 2927 } 2928 2929 static void __exit qedi_cleanup(void) 2930 { 2931 pci_unregister_driver(&qedi_pci_driver); 2932 cpuhp_remove_state(qedi_cpuhp_state); 2933 iscsi_unregister_transport(&qedi_iscsi_transport); 2934 2935 #ifdef CONFIG_DEBUG_FS 2936 qedi_dbg_exit(); 2937 #endif 2938 qed_put_iscsi_ops(); 2939 } 2940 2941 MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module"); 2942 MODULE_LICENSE("GPL"); 2943 MODULE_AUTHOR("QLogic Corporation"); 2944 MODULE_VERSION(QEDI_MODULE_VERSION); 2945 module_init(qedi_init); 2946 module_exit(qedi_cleanup); 2947