1/* 2 * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver. 3 * 4 * Copyright (c) 2006 - 2009 Broadcom Corporation 5 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. 6 * Copyright (c) 2007, 2008 Mike Christie 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation. 11 * 12 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) 13 */ 14 15#include <linux/slab.h> 16#include <scsi/scsi_tcq.h> 17#include <scsi/libiscsi.h> 18#include "bnx2i.h" 19 20struct scsi_transport_template *bnx2i_scsi_xport_template; 21struct iscsi_transport bnx2i_iscsi_transport; 22static struct scsi_host_template bnx2i_host_template; 23 24/* 25 * Global endpoint resource info 26 */ 27static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */ 28 29 30static int bnx2i_adapter_ready(struct bnx2i_hba *hba) 31{ 32 int retval = 0; 33 34 if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) || 35 test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) || 36 test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state)) 37 retval = -EPERM; 38 return retval; 39} 40 41/** 42 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks 43 * @cmd: iscsi cmd struct pointer 44 * @buf_off: absolute buffer offset 45 * @start_bd_off: u32 pointer to return the offset within the BD 46 * indicated by 'start_bd_idx' on which 'buf_off' falls 47 * @start_bd_idx: index of the BD on which 'buf_off' falls 48 * 49 * identifies & marks various bd info for scsi command's imm data, 50 * unsolicited data and the first solicited data seq. 51 */ 52static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off, 53 u32 *start_bd_off, u32 *start_bd_idx) 54{ 55 struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl; 56 u32 cur_offset = 0; 57 u32 cur_bd_idx = 0; 58 59 if (buf_off) { 60 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) { 61 cur_offset += bd_tbl->buffer_length; 62 cur_bd_idx++; 63 bd_tbl++; 64 } 65 } 66 67 *start_bd_off = buf_off - cur_offset; 68 *start_bd_idx = cur_bd_idx; 69} 70 71/** 72 * bnx2i_setup_write_cmd_bd_info - sets up BD various information 73 * @task: transport layer's cmd struct pointer 74 * 75 * identifies & marks various bd info for scsi command's immediate data, 76 * unsolicited data and first solicited data seq which includes BD start 77 * index & BD buf off. his function takes into account iscsi parameter such 78 * as immediate data and unsolicited data is support on this connection. 79 */ 80static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task) 81{ 82 struct bnx2i_cmd *cmd = task->dd_data; 83 u32 start_bd_offset; 84 u32 start_bd_idx; 85 u32 buffer_offset = 0; 86 u32 cmd_len = cmd->req.total_data_transfer_length; 87 88 /* if ImmediateData is turned off & IntialR2T is turned on, 89 * there will be no immediate or unsolicited data, just return. 90 */ 91 if (!iscsi_task_has_unsol_data(task) && !task->imm_count) 92 return; 93 94 /* Immediate data */ 95 buffer_offset += task->imm_count; 96 if (task->imm_count == cmd_len) 97 return; 98 99 if (iscsi_task_has_unsol_data(task)) { 100 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset, 101 &start_bd_offset, &start_bd_idx); 102 cmd->req.ud_buffer_offset = start_bd_offset; 103 cmd->req.ud_start_bd_index = start_bd_idx; 104 buffer_offset += task->unsol_r2t.data_length; 105 } 106 107 if (buffer_offset != cmd_len) { 108 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset, 109 &start_bd_offset, &start_bd_idx); 110 if ((start_bd_offset > task->conn->session->first_burst) || 111 (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) { 112 int i = 0; 113 114 iscsi_conn_printk(KERN_ALERT, task->conn, 115 "bnx2i- error, buf offset 0x%x " 116 "bd_valid %d use_sg %d\n", 117 buffer_offset, cmd->io_tbl.bd_valid, 118 scsi_sg_count(cmd->scsi_cmd)); 119 for (i = 0; i < cmd->io_tbl.bd_valid; i++) 120 iscsi_conn_printk(KERN_ALERT, task->conn, 121 "bnx2i err, bd[%d]: len %x\n", 122 i, cmd->io_tbl.bd_tbl[i].\ 123 buffer_length); 124 } 125 cmd->req.sd_buffer_offset = start_bd_offset; 126 cmd->req.sd_start_bd_index = start_bd_idx; 127 } 128} 129 130 131 132/** 133 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table 134 * @hba: adapter instance 135 * @cmd: iscsi cmd struct pointer 136 * 137 * map SG list 138 */ 139static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) 140{ 141 struct scsi_cmnd *sc = cmd->scsi_cmd; 142 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; 143 struct scatterlist *sg; 144 int byte_count = 0; 145 int bd_count = 0; 146 int sg_count; 147 int sg_len; 148 u64 addr; 149 int i; 150 151 BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD); 152 153 sg_count = scsi_dma_map(sc); 154 155 scsi_for_each_sg(sc, sg, sg_count, i) { 156 sg_len = sg_dma_len(sg); 157 addr = (u64) sg_dma_address(sg); 158 bd[bd_count].buffer_addr_lo = addr & 0xffffffff; 159 bd[bd_count].buffer_addr_hi = addr >> 32; 160 bd[bd_count].buffer_length = sg_len; 161 bd[bd_count].flags = 0; 162 if (bd_count == 0) 163 bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN; 164 165 byte_count += sg_len; 166 bd_count++; 167 } 168 169 if (bd_count) 170 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN; 171 172 BUG_ON(byte_count != scsi_bufflen(sc)); 173 return bd_count; 174} 175 176/** 177 * bnx2i_iscsi_map_sg_list - maps SG list 178 * @cmd: iscsi cmd struct pointer 179 * 180 * creates BD list table for the command 181 */ 182static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd) 183{ 184 int bd_count; 185 186 bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd); 187 if (!bd_count) { 188 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; 189 190 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0; 191 bd[0].buffer_length = bd[0].flags = 0; 192 } 193 cmd->io_tbl.bd_valid = bd_count; 194} 195 196 197/** 198 * bnx2i_iscsi_unmap_sg_list - unmaps SG list 199 * @cmd: iscsi cmd struct pointer 200 * 201 * unmap IO buffers and invalidate the BD table 202 */ 203void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd) 204{ 205 struct scsi_cmnd *sc = cmd->scsi_cmd; 206 207 if (cmd->io_tbl.bd_valid && sc) { 208 scsi_dma_unmap(sc); 209 cmd->io_tbl.bd_valid = 0; 210 } 211} 212 213static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd) 214{ 215 memset(&cmd->req, 0x00, sizeof(cmd->req)); 216 cmd->req.op_code = 0xFF; 217 cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma; 218 cmd->req.bd_list_addr_hi = 219 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32); 220 221} 222 223 224/** 225 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid' 226 * @hba: pointer to adapter instance 227 * @conn: pointer to iscsi connection 228 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) 229 * 230 * update iscsi cid table entry with connection pointer. This enables 231 * driver to quickly get hold of connection structure pointer in 232 * completion/interrupt thread using iscsi context ID 233 */ 234static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba, 235 struct bnx2i_conn *bnx2i_conn, 236 u32 iscsi_cid) 237{ 238 if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) { 239 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, 240 "conn bind - entry #%d not free\n", iscsi_cid); 241 return -EBUSY; 242 } 243 244 hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn; 245 return 0; 246} 247 248 249/** 250 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr 251 * @hba: pointer to adapter instance 252 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) 253 */ 254struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba, 255 u16 iscsi_cid) 256{ 257 if (!hba->cid_que.conn_cid_tbl) { 258 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n"); 259 return NULL; 260 261 } else if (iscsi_cid >= hba->max_active_conns) { 262 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid); 263 return NULL; 264 } 265 return hba->cid_que.conn_cid_tbl[iscsi_cid]; 266} 267 268 269/** 270 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool 271 * @hba: pointer to adapter instance 272 */ 273static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba) 274{ 275 int idx; 276 277 if (!hba->cid_que.cid_free_cnt) 278 return -1; 279 280 idx = hba->cid_que.cid_q_cons_idx; 281 hba->cid_que.cid_q_cons_idx++; 282 if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx) 283 hba->cid_que.cid_q_cons_idx = 0; 284 285 hba->cid_que.cid_free_cnt--; 286 return hba->cid_que.cid_que[idx]; 287} 288 289 290/** 291 * bnx2i_free_iscsi_cid - returns tcp port to free list 292 * @hba: pointer to adapter instance 293 * @iscsi_cid: iscsi context ID to free 294 */ 295static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid) 296{ 297 int idx; 298 299 if (iscsi_cid == (u16) -1) 300 return; 301 302 hba->cid_que.cid_free_cnt++; 303 304 idx = hba->cid_que.cid_q_prod_idx; 305 hba->cid_que.cid_que[idx] = iscsi_cid; 306 hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL; 307 hba->cid_que.cid_q_prod_idx++; 308 if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx) 309 hba->cid_que.cid_q_prod_idx = 0; 310} 311 312 313/** 314 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue 315 * @hba: pointer to adapter instance 316 * 317 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table, 318 * and initialize table attributes 319 */ 320static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba) 321{ 322 int mem_size; 323 int i; 324 325 mem_size = hba->max_active_conns * sizeof(u32); 326 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 327 328 hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL); 329 if (!hba->cid_que.cid_que_base) 330 return -ENOMEM; 331 332 mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *); 333 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 334 hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL); 335 if (!hba->cid_que.conn_cid_tbl) { 336 kfree(hba->cid_que.cid_que_base); 337 hba->cid_que.cid_que_base = NULL; 338 return -ENOMEM; 339 } 340 341 hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base; 342 hba->cid_que.cid_q_prod_idx = 0; 343 hba->cid_que.cid_q_cons_idx = 0; 344 hba->cid_que.cid_q_max_idx = hba->max_active_conns; 345 hba->cid_que.cid_free_cnt = hba->max_active_conns; 346 347 for (i = 0; i < hba->max_active_conns; i++) { 348 hba->cid_que.cid_que[i] = i; 349 hba->cid_que.conn_cid_tbl[i] = NULL; 350 } 351 return 0; 352} 353 354 355/** 356 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources 357 * @hba: pointer to adapter instance 358 */ 359static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba) 360{ 361 kfree(hba->cid_que.cid_que_base); 362 hba->cid_que.cid_que_base = NULL; 363 364 kfree(hba->cid_que.conn_cid_tbl); 365 hba->cid_que.conn_cid_tbl = NULL; 366} 367 368 369/** 370 * bnx2i_alloc_ep - allocates ep structure from global pool 371 * @hba: pointer to adapter instance 372 * 373 * routine allocates a free endpoint structure from global pool and 374 * a tcp port to be used for this connection. Global resource lock, 375 * 'bnx2i_resc_lock' is held while accessing shared global data structures 376 */ 377static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba) 378{ 379 struct iscsi_endpoint *ep; 380 struct bnx2i_endpoint *bnx2i_ep; 381 382 ep = iscsi_create_endpoint(sizeof(*bnx2i_ep)); 383 if (!ep) { 384 printk(KERN_ERR "bnx2i: Could not allocate ep\n"); 385 return NULL; 386 } 387 388 bnx2i_ep = ep->dd_data; 389 bnx2i_ep->cls_ep = ep; 390 INIT_LIST_HEAD(&bnx2i_ep->link); 391 bnx2i_ep->state = EP_STATE_IDLE; 392 bnx2i_ep->ep_iscsi_cid = (u16) -1; 393 bnx2i_ep->hba = hba; 394 bnx2i_ep->hba_age = hba->age; 395 hba->ofld_conns_active++; 396 init_waitqueue_head(&bnx2i_ep->ofld_wait); 397 return ep; 398} 399 400 401/** 402 * bnx2i_free_ep - free endpoint 403 * @ep: pointer to iscsi endpoint structure 404 */ 405static void bnx2i_free_ep(struct iscsi_endpoint *ep) 406{ 407 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data; 408 unsigned long flags; 409 410 spin_lock_irqsave(&bnx2i_resc_lock, flags); 411 bnx2i_ep->state = EP_STATE_IDLE; 412 bnx2i_ep->hba->ofld_conns_active--; 413 414 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid); 415 if (bnx2i_ep->conn) { 416 bnx2i_ep->conn->ep = NULL; 417 bnx2i_ep->conn = NULL; 418 } 419 420 bnx2i_ep->hba = NULL; 421 spin_unlock_irqrestore(&bnx2i_resc_lock, flags); 422 iscsi_destroy_endpoint(ep); 423} 424 425 426/** 427 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command 428 * @hba: adapter instance pointer 429 * @session: iscsi session pointer 430 * @cmd: iscsi command structure 431 */ 432static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session, 433 struct bnx2i_cmd *cmd) 434{ 435 struct io_bdt *io = &cmd->io_tbl; 436 struct iscsi_bd *bd; 437 438 io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, 439 ISCSI_MAX_BDS_PER_CMD * sizeof(*bd), 440 &io->bd_tbl_dma, GFP_KERNEL); 441 if (!io->bd_tbl) { 442 iscsi_session_printk(KERN_ERR, session, "Could not " 443 "allocate bdt.\n"); 444 return -ENOMEM; 445 } 446 io->bd_valid = 0; 447 return 0; 448} 449 450/** 451 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table 452 * @hba: adapter instance pointer 453 * @session: iscsi session pointer 454 * @cmd: iscsi command structure 455 */ 456static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba, 457 struct iscsi_session *session) 458{ 459 int i; 460 461 for (i = 0; i < session->cmds_max; i++) { 462 struct iscsi_task *task = session->cmds[i]; 463 struct bnx2i_cmd *cmd = task->dd_data; 464 465 if (cmd->io_tbl.bd_tbl) 466 dma_free_coherent(&hba->pcidev->dev, 467 ISCSI_MAX_BDS_PER_CMD * 468 sizeof(struct iscsi_bd), 469 cmd->io_tbl.bd_tbl, 470 cmd->io_tbl.bd_tbl_dma); 471 } 472 473} 474 475 476/** 477 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session 478 * @hba: adapter instance pointer 479 * @session: iscsi session pointer 480 */ 481static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba, 482 struct iscsi_session *session) 483{ 484 int i; 485 486 for (i = 0; i < session->cmds_max; i++) { 487 struct iscsi_task *task = session->cmds[i]; 488 struct bnx2i_cmd *cmd = task->dd_data; 489 490 task->hdr = &cmd->hdr; 491 task->hdr_max = sizeof(struct iscsi_hdr); 492 493 if (bnx2i_alloc_bdt(hba, session, cmd)) 494 goto free_bdts; 495 } 496 497 return 0; 498 499free_bdts: 500 bnx2i_destroy_cmd_pool(hba, session); 501 return -ENOMEM; 502} 503 504 505/** 506 * bnx2i_setup_mp_bdt - allocate BD table resources 507 * @hba: pointer to adapter structure 508 * 509 * Allocate memory for dummy buffer and associated BD 510 * table to be used by middle path (MP) requests 511 */ 512static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba) 513{ 514 int rc = 0; 515 struct iscsi_bd *mp_bdt; 516 u64 addr; 517 518 hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, 519 &hba->mp_bd_dma, GFP_KERNEL); 520 if (!hba->mp_bd_tbl) { 521 printk(KERN_ERR "unable to allocate Middle Path BDT\n"); 522 rc = -1; 523 goto out; 524 } 525 526 hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, 527 &hba->dummy_buf_dma, GFP_KERNEL); 528 if (!hba->dummy_buffer) { 529 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n"); 530 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 531 hba->mp_bd_tbl, hba->mp_bd_dma); 532 hba->mp_bd_tbl = NULL; 533 rc = -1; 534 goto out; 535 } 536 537 mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl; 538 addr = (unsigned long) hba->dummy_buf_dma; 539 mp_bdt->buffer_addr_lo = addr & 0xffffffff; 540 mp_bdt->buffer_addr_hi = addr >> 32; 541 mp_bdt->buffer_length = PAGE_SIZE; 542 mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN | 543 ISCSI_BD_FIRST_IN_BD_CHAIN; 544out: 545 return rc; 546} 547 548 549/** 550 * bnx2i_free_mp_bdt - releases ITT back to free pool 551 * @hba: pointer to adapter instance 552 * 553 * free MP dummy buffer and associated BD table 554 */ 555static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba) 556{ 557 if (hba->mp_bd_tbl) { 558 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 559 hba->mp_bd_tbl, hba->mp_bd_dma); 560 hba->mp_bd_tbl = NULL; 561 } 562 if (hba->dummy_buffer) { 563 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 564 hba->dummy_buffer, hba->dummy_buf_dma); 565 hba->dummy_buffer = NULL; 566 } 567 return; 568} 569 570/** 571 * bnx2i_drop_session - notifies iscsid of connection error. 572 * @hba: adapter instance pointer 573 * @session: iscsi session pointer 574 * 575 * This notifies iscsid that there is a error, so it can initiate 576 * recovery. 577 * 578 * This relies on caller using the iscsi class iterator so the object 579 * is refcounted and does not disapper from under us. 580 */ 581void bnx2i_drop_session(struct iscsi_cls_session *cls_session) 582{ 583 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED); 584} 585 586/** 587 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list 588 * @hba: pointer to adapter instance 589 * @ep: pointer to endpoint (transport indentifier) structure 590 * 591 * EP destroy queue manager 592 */ 593static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba, 594 struct bnx2i_endpoint *ep) 595{ 596 write_lock_bh(&hba->ep_rdwr_lock); 597 list_add_tail(&ep->link, &hba->ep_destroy_list); 598 write_unlock_bh(&hba->ep_rdwr_lock); 599 return 0; 600} 601 602/** 603 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list 604 * 605 * @hba: pointer to adapter instance 606 * @ep: pointer to endpoint (transport indentifier) structure 607 * 608 * EP destroy queue manager 609 */ 610static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba, 611 struct bnx2i_endpoint *ep) 612{ 613 write_lock_bh(&hba->ep_rdwr_lock); 614 list_del_init(&ep->link); 615 write_unlock_bh(&hba->ep_rdwr_lock); 616 617 return 0; 618} 619 620/** 621 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list 622 * @hba: pointer to adapter instance 623 * @ep: pointer to endpoint (transport indentifier) structure 624 * 625 * pending conn offload completion queue manager 626 */ 627static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba, 628 struct bnx2i_endpoint *ep) 629{ 630 write_lock_bh(&hba->ep_rdwr_lock); 631 list_add_tail(&ep->link, &hba->ep_ofld_list); 632 write_unlock_bh(&hba->ep_rdwr_lock); 633 return 0; 634} 635 636/** 637 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list 638 * @hba: pointer to adapter instance 639 * @ep: pointer to endpoint (transport indentifier) structure 640 * 641 * pending conn offload completion queue manager 642 */ 643static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba, 644 struct bnx2i_endpoint *ep) 645{ 646 write_lock_bh(&hba->ep_rdwr_lock); 647 list_del_init(&ep->link); 648 write_unlock_bh(&hba->ep_rdwr_lock); 649 return 0; 650} 651 652 653/** 654 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints 655 * 656 * @hba: pointer to adapter instance 657 * @iscsi_cid: iscsi context ID to find 658 * 659 */ 660struct bnx2i_endpoint * 661bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid) 662{ 663 struct list_head *list; 664 struct list_head *tmp; 665 struct bnx2i_endpoint *ep; 666 667 read_lock_bh(&hba->ep_rdwr_lock); 668 list_for_each_safe(list, tmp, &hba->ep_ofld_list) { 669 ep = (struct bnx2i_endpoint *)list; 670 671 if (ep->ep_iscsi_cid == iscsi_cid) 672 break; 673 ep = NULL; 674 } 675 read_unlock_bh(&hba->ep_rdwr_lock); 676 677 if (!ep) 678 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid); 679 return ep; 680} 681 682/** 683 * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list 684 * @hba: pointer to adapter instance 685 * @iscsi_cid: iscsi context ID to find 686 * 687 */ 688struct bnx2i_endpoint * 689bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid) 690{ 691 struct list_head *list; 692 struct list_head *tmp; 693 struct bnx2i_endpoint *ep; 694 695 read_lock_bh(&hba->ep_rdwr_lock); 696 list_for_each_safe(list, tmp, &hba->ep_destroy_list) { 697 ep = (struct bnx2i_endpoint *)list; 698 699 if (ep->ep_iscsi_cid == iscsi_cid) 700 break; 701 ep = NULL; 702 } 703 read_unlock_bh(&hba->ep_rdwr_lock); 704 705 if (!ep) 706 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid); 707 708 return ep; 709} 710 711/** 712 * bnx2i_ep_active_list_add - add an entry to ep active list 713 * @hba: pointer to adapter instance 714 * @ep: pointer to endpoint (transport indentifier) structure 715 * 716 * current active conn queue manager 717 */ 718static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba, 719 struct bnx2i_endpoint *ep) 720{ 721 write_lock_bh(&hba->ep_rdwr_lock); 722 list_add_tail(&ep->link, &hba->ep_active_list); 723 write_unlock_bh(&hba->ep_rdwr_lock); 724} 725 726 727/** 728 * bnx2i_ep_active_list_del - deletes an entry to ep active list 729 * @hba: pointer to adapter instance 730 * @ep: pointer to endpoint (transport indentifier) structure 731 * 732 * current active conn queue manager 733 */ 734static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba, 735 struct bnx2i_endpoint *ep) 736{ 737 write_lock_bh(&hba->ep_rdwr_lock); 738 list_del_init(&ep->link); 739 write_unlock_bh(&hba->ep_rdwr_lock); 740} 741 742 743/** 744 * bnx2i_setup_host_queue_size - assigns shost->can_queue param 745 * @hba: pointer to adapter instance 746 * @shost: scsi host pointer 747 * 748 * Initializes 'can_queue' parameter based on how many outstanding commands 749 * the device can handle. Each device 5708/5709/57710 has different 750 * capabilities 751 */ 752static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba, 753 struct Scsi_Host *shost) 754{ 755 if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type)) 756 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708; 757 else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) 758 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709; 759 else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) 760 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710; 761 else 762 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708; 763} 764 765 766/** 767 * bnx2i_alloc_hba - allocate and init adapter instance 768 * @cnic: cnic device pointer 769 * 770 * allocate & initialize adapter structure and call other 771 * support routines to do per adapter initialization 772 */ 773struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic) 774{ 775 struct Scsi_Host *shost; 776 struct bnx2i_hba *hba; 777 778 shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0); 779 if (!shost) 780 return NULL; 781 shost->dma_boundary = cnic->pcidev->dma_mask; 782 shost->transportt = bnx2i_scsi_xport_template; 783 shost->max_id = ISCSI_MAX_CONNS_PER_HBA; 784 shost->max_channel = 0; 785 shost->max_lun = 512; 786 shost->max_cmd_len = 16; 787 788 hba = iscsi_host_priv(shost); 789 hba->shost = shost; 790 hba->netdev = cnic->netdev; 791 /* Get PCI related information and update hba struct members */ 792 hba->pcidev = cnic->pcidev; 793 pci_dev_get(hba->pcidev); 794 hba->pci_did = hba->pcidev->device; 795 hba->pci_vid = hba->pcidev->vendor; 796 hba->pci_sdid = hba->pcidev->subsystem_device; 797 hba->pci_svid = hba->pcidev->subsystem_vendor; 798 hba->pci_func = PCI_FUNC(hba->pcidev->devfn); 799 hba->pci_devno = PCI_SLOT(hba->pcidev->devfn); 800 801 bnx2i_identify_device(hba); 802 bnx2i_setup_host_queue_size(hba, shost); 803 804 if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { 805 hba->regview = ioremap_nocache(hba->netdev->base_addr, 806 BNX2_MQ_CONFIG2); 807 if (!hba->regview) 808 goto ioreg_map_err; 809 } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { 810 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096); 811 if (!hba->regview) 812 goto ioreg_map_err; 813 } 814 815 if (bnx2i_setup_mp_bdt(hba)) 816 goto mp_bdt_mem_err; 817 818 INIT_LIST_HEAD(&hba->ep_ofld_list); 819 INIT_LIST_HEAD(&hba->ep_active_list); 820 INIT_LIST_HEAD(&hba->ep_destroy_list); 821 rwlock_init(&hba->ep_rdwr_lock); 822 823 hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED; 824 825 /* different values for 5708/5709/57710 */ 826 hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA; 827 828 if (bnx2i_setup_free_cid_que(hba)) 829 goto cid_que_err; 830 831 /* SQ/RQ/CQ size can be changed via sysfx interface */ 832 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { 833 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX) 834 hba->max_sqes = sq_size; 835 else 836 hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT; 837 } else { /* 5706/5708/5709 */ 838 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX) 839 hba->max_sqes = sq_size; 840 else 841 hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT; 842 } 843 844 hba->max_rqes = rq_size; 845 hba->max_cqes = hba->max_sqes + rq_size; 846 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { 847 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX) 848 hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX; 849 } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX) 850 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX; 851 852 hba->num_ccell = hba->max_sqes / 2; 853 854 spin_lock_init(&hba->lock); 855 mutex_init(&hba->net_dev_lock); 856 init_waitqueue_head(&hba->eh_wait); 857 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { 858 hba->hba_shutdown_tmo = 20 * HZ; 859 hba->conn_teardown_tmo = 20 * HZ; 860 hba->conn_ctx_destroy_tmo = 6 * HZ; 861 } else { /* 5706/5708/5709 */ 862 hba->hba_shutdown_tmo = 20 * HZ; 863 hba->conn_teardown_tmo = 10 * HZ; 864 hba->conn_ctx_destroy_tmo = 2 * HZ; 865 } 866 867 if (iscsi_host_add(shost, &hba->pcidev->dev)) 868 goto free_dump_mem; 869 return hba; 870 871free_dump_mem: 872 bnx2i_release_free_cid_que(hba); 873cid_que_err: 874 bnx2i_free_mp_bdt(hba); 875mp_bdt_mem_err: 876 if (hba->regview) { 877 iounmap(hba->regview); 878 hba->regview = NULL; 879 } 880ioreg_map_err: 881 pci_dev_put(hba->pcidev); 882 scsi_host_put(shost); 883 return NULL; 884} 885 886/** 887 * bnx2i_free_hba- releases hba structure and resources held by the adapter 888 * @hba: pointer to adapter instance 889 * 890 * free adapter structure and call various cleanup routines. 891 */ 892void bnx2i_free_hba(struct bnx2i_hba *hba) 893{ 894 struct Scsi_Host *shost = hba->shost; 895 896 iscsi_host_remove(shost); 897 INIT_LIST_HEAD(&hba->ep_ofld_list); 898 INIT_LIST_HEAD(&hba->ep_active_list); 899 INIT_LIST_HEAD(&hba->ep_destroy_list); 900 pci_dev_put(hba->pcidev); 901 902 if (hba->regview) { 903 iounmap(hba->regview); 904 hba->regview = NULL; 905 } 906 bnx2i_free_mp_bdt(hba); 907 bnx2i_release_free_cid_que(hba); 908 iscsi_host_free(shost); 909} 910 911/** 912 * bnx2i_conn_free_login_resources - free DMA resources used for login process 913 * @hba: pointer to adapter instance 914 * @bnx2i_conn: iscsi connection pointer 915 * 916 * Login related resources, mostly BDT & payload DMA memory is freed 917 */ 918static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba, 919 struct bnx2i_conn *bnx2i_conn) 920{ 921 if (bnx2i_conn->gen_pdu.resp_bd_tbl) { 922 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 923 bnx2i_conn->gen_pdu.resp_bd_tbl, 924 bnx2i_conn->gen_pdu.resp_bd_dma); 925 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL; 926 } 927 928 if (bnx2i_conn->gen_pdu.req_bd_tbl) { 929 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 930 bnx2i_conn->gen_pdu.req_bd_tbl, 931 bnx2i_conn->gen_pdu.req_bd_dma); 932 bnx2i_conn->gen_pdu.req_bd_tbl = NULL; 933 } 934 935 if (bnx2i_conn->gen_pdu.resp_buf) { 936 dma_free_coherent(&hba->pcidev->dev, 937 ISCSI_DEF_MAX_RECV_SEG_LEN, 938 bnx2i_conn->gen_pdu.resp_buf, 939 bnx2i_conn->gen_pdu.resp_dma_addr); 940 bnx2i_conn->gen_pdu.resp_buf = NULL; 941 } 942 943 if (bnx2i_conn->gen_pdu.req_buf) { 944 dma_free_coherent(&hba->pcidev->dev, 945 ISCSI_DEF_MAX_RECV_SEG_LEN, 946 bnx2i_conn->gen_pdu.req_buf, 947 bnx2i_conn->gen_pdu.req_dma_addr); 948 bnx2i_conn->gen_pdu.req_buf = NULL; 949 } 950} 951 952/** 953 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop. 954 * @hba: pointer to adapter instance 955 * @bnx2i_conn: iscsi connection pointer 956 * 957 * Mgmt task DNA resources are allocated in this routine. 958 */ 959static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba, 960 struct bnx2i_conn *bnx2i_conn) 961{ 962 /* Allocate memory for login request/response buffers */ 963 bnx2i_conn->gen_pdu.req_buf = 964 dma_alloc_coherent(&hba->pcidev->dev, 965 ISCSI_DEF_MAX_RECV_SEG_LEN, 966 &bnx2i_conn->gen_pdu.req_dma_addr, 967 GFP_KERNEL); 968 if (bnx2i_conn->gen_pdu.req_buf == NULL) 969 goto login_req_buf_failure; 970 971 bnx2i_conn->gen_pdu.req_buf_size = 0; 972 bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf; 973 974 bnx2i_conn->gen_pdu.resp_buf = 975 dma_alloc_coherent(&hba->pcidev->dev, 976 ISCSI_DEF_MAX_RECV_SEG_LEN, 977 &bnx2i_conn->gen_pdu.resp_dma_addr, 978 GFP_KERNEL); 979 if (bnx2i_conn->gen_pdu.resp_buf == NULL) 980 goto login_resp_buf_failure; 981 982 bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; 983 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf; 984 985 bnx2i_conn->gen_pdu.req_bd_tbl = 986 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, 987 &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL); 988 if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL) 989 goto login_req_bd_tbl_failure; 990 991 bnx2i_conn->gen_pdu.resp_bd_tbl = 992 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, 993 &bnx2i_conn->gen_pdu.resp_bd_dma, 994 GFP_KERNEL); 995 if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL) 996 goto login_resp_bd_tbl_failure; 997 998 return 0; 999 1000login_resp_bd_tbl_failure: 1001 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 1002 bnx2i_conn->gen_pdu.req_bd_tbl, 1003 bnx2i_conn->gen_pdu.req_bd_dma); 1004 bnx2i_conn->gen_pdu.req_bd_tbl = NULL; 1005 1006login_req_bd_tbl_failure: 1007 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 1008 bnx2i_conn->gen_pdu.resp_buf, 1009 bnx2i_conn->gen_pdu.resp_dma_addr); 1010 bnx2i_conn->gen_pdu.resp_buf = NULL; 1011login_resp_buf_failure: 1012 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 1013 bnx2i_conn->gen_pdu.req_buf, 1014 bnx2i_conn->gen_pdu.req_dma_addr); 1015 bnx2i_conn->gen_pdu.req_buf = NULL; 1016login_req_buf_failure: 1017 iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data, 1018 "login resource alloc failed!!\n"); 1019 return -ENOMEM; 1020 1021} 1022 1023 1024/** 1025 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table. 1026 * @bnx2i_conn: iscsi connection pointer 1027 * 1028 * Allocates buffers and BD tables before shipping requests to cnic 1029 * for PDUs prepared by 'iscsid' daemon 1030 */ 1031static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn) 1032{ 1033 struct iscsi_bd *bd_tbl; 1034 1035 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl; 1036 1037 bd_tbl->buffer_addr_hi = 1038 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32); 1039 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr; 1040 bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr - 1041 bnx2i_conn->gen_pdu.req_buf; 1042 bd_tbl->reserved0 = 0; 1043 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN | 1044 ISCSI_BD_FIRST_IN_BD_CHAIN; 1045 1046 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl; 1047 bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32; 1048 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr; 1049 bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN; 1050 bd_tbl->reserved0 = 0; 1051 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN | 1052 ISCSI_BD_FIRST_IN_BD_CHAIN; 1053} 1054 1055 1056/** 1057 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks. 1058 * @task: transport layer task pointer 1059 * 1060 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login, 1061 * Nop-out and Logout requests flow through this path. 1062 */ 1063static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task) 1064{ 1065 struct bnx2i_cmd *cmd = task->dd_data; 1066 struct bnx2i_conn *bnx2i_conn = cmd->conn; 1067 int rc = 0; 1068 char *buf; 1069 int data_len; 1070 1071 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn); 1072 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { 1073 case ISCSI_OP_LOGIN: 1074 bnx2i_send_iscsi_login(bnx2i_conn, task); 1075 break; 1076 case ISCSI_OP_NOOP_OUT: 1077 data_len = bnx2i_conn->gen_pdu.req_buf_size; 1078 buf = bnx2i_conn->gen_pdu.req_buf; 1079 if (data_len) 1080 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task, 1081 RESERVED_ITT, 1082 buf, data_len, 1); 1083 else 1084 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task, 1085 RESERVED_ITT, 1086 NULL, 0, 1); 1087 break; 1088 case ISCSI_OP_LOGOUT: 1089 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task); 1090 break; 1091 case ISCSI_OP_SCSI_TMFUNC: 1092 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task); 1093 break; 1094 default: 1095 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, 1096 "send_gen: unsupported op 0x%x\n", 1097 task->hdr->opcode); 1098 } 1099 return rc; 1100} 1101 1102 1103/********************************************************************** 1104 * SCSI-ML Interface 1105 **********************************************************************/ 1106 1107/** 1108 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe 1109 * @sc: SCSI-ML command pointer 1110 * @cmd: iscsi cmd pointer 1111 */ 1112static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd) 1113{ 1114 u32 dword; 1115 int lpcnt; 1116 u8 *srcp; 1117 u32 *dstp; 1118 u32 scsi_lun[2]; 1119 1120 int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun); 1121 cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]); 1122 cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]); 1123 1124 lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword); 1125 srcp = (u8 *) sc->cmnd; 1126 dstp = (u32 *) cmd->req.cdb; 1127 while (lpcnt--) { 1128 memcpy(&dword, (const void *) srcp, 4); 1129 *dstp = cpu_to_be32(dword); 1130 srcp += 4; 1131 dstp++; 1132 } 1133 if (sc->cmd_len & 0x3) { 1134 dword = (u32) srcp[0] | ((u32) srcp[1] << 8); 1135 *dstp = cpu_to_be32(dword); 1136 } 1137} 1138 1139static void bnx2i_cleanup_task(struct iscsi_task *task) 1140{ 1141 struct iscsi_conn *conn = task->conn; 1142 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1143 struct bnx2i_hba *hba = bnx2i_conn->hba; 1144 1145 /* 1146 * mgmt task or cmd was never sent to us to transmit. 1147 */ 1148 if (!task->sc || task->state == ISCSI_TASK_PENDING) 1149 return; 1150 /* 1151 * need to clean-up task context to claim dma buffers 1152 */ 1153 if (task->state == ISCSI_TASK_ABRT_TMF) { 1154 bnx2i_send_cmd_cleanup_req(hba, task->dd_data); 1155 1156 spin_unlock_bh(&conn->session->lock); 1157 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl, 1158 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT)); 1159 spin_lock_bh(&conn->session->lock); 1160 } 1161 bnx2i_iscsi_unmap_sg_list(task->dd_data); 1162} 1163 1164/** 1165 * bnx2i_mtask_xmit - transmit mtask to chip for further processing 1166 * @conn: transport layer conn structure pointer 1167 * @task: transport layer command structure pointer 1168 */ 1169static int 1170bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 1171{ 1172 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1173 struct bnx2i_cmd *cmd = task->dd_data; 1174 1175 memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); 1176 1177 bnx2i_setup_cmd_wqe_template(cmd); 1178 bnx2i_conn->gen_pdu.req_buf_size = task->data_count; 1179 if (task->data_count) { 1180 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data, 1181 task->data_count); 1182 bnx2i_conn->gen_pdu.req_wr_ptr = 1183 bnx2i_conn->gen_pdu.req_buf + task->data_count; 1184 } 1185 cmd->conn = conn->dd_data; 1186 cmd->scsi_cmd = NULL; 1187 return bnx2i_iscsi_send_generic_request(task); 1188} 1189 1190/** 1191 * bnx2i_task_xmit - transmit iscsi command to chip for further processing 1192 * @task: transport layer command structure pointer 1193 * 1194 * maps SG buffers and send request to chip/firmware in the form of SQ WQE 1195 */ 1196static int bnx2i_task_xmit(struct iscsi_task *task) 1197{ 1198 struct iscsi_conn *conn = task->conn; 1199 struct iscsi_session *session = conn->session; 1200 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session); 1201 struct bnx2i_hba *hba = iscsi_host_priv(shost); 1202 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1203 struct scsi_cmnd *sc = task->sc; 1204 struct bnx2i_cmd *cmd = task->dd_data; 1205 struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr; 1206 1207 /* 1208 * If there is no scsi_cmnd this must be a mgmt task 1209 */ 1210 if (!sc) 1211 return bnx2i_mtask_xmit(conn, task); 1212 1213 bnx2i_setup_cmd_wqe_template(cmd); 1214 cmd->req.op_code = ISCSI_OP_SCSI_CMD; 1215 cmd->conn = bnx2i_conn; 1216 cmd->scsi_cmd = sc; 1217 cmd->req.total_data_transfer_length = scsi_bufflen(sc); 1218 cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn); 1219 1220 bnx2i_iscsi_map_sg_list(cmd); 1221 bnx2i_cpy_scsi_cdb(sc, cmd); 1222 1223 cmd->req.op_attr = ISCSI_ATTR_SIMPLE; 1224 if (sc->sc_data_direction == DMA_TO_DEVICE) { 1225 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE; 1226 cmd->req.itt = task->itt | 1227 (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT); 1228 bnx2i_setup_write_cmd_bd_info(task); 1229 } else { 1230 if (scsi_bufflen(sc)) 1231 cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ; 1232 cmd->req.itt = task->itt | 1233 (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT); 1234 } 1235 1236 cmd->req.num_bds = cmd->io_tbl.bd_valid; 1237 if (!cmd->io_tbl.bd_valid) { 1238 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma; 1239 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32); 1240 cmd->req.num_bds = 1; 1241 } 1242 1243 bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd); 1244 return 0; 1245} 1246 1247/** 1248 * bnx2i_session_create - create a new iscsi session 1249 * @cmds_max: max commands supported 1250 * @qdepth: scsi queue depth to support 1251 * @initial_cmdsn: initial iscsi CMDSN to be used for this session 1252 * 1253 * Creates a new iSCSI session instance on given device. 1254 */ 1255static struct iscsi_cls_session * 1256bnx2i_session_create(struct iscsi_endpoint *ep, 1257 uint16_t cmds_max, uint16_t qdepth, 1258 uint32_t initial_cmdsn) 1259{ 1260 struct Scsi_Host *shost; 1261 struct iscsi_cls_session *cls_session; 1262 struct bnx2i_hba *hba; 1263 struct bnx2i_endpoint *bnx2i_ep; 1264 1265 if (!ep) { 1266 printk(KERN_ERR "bnx2i: missing ep.\n"); 1267 return NULL; 1268 } 1269 1270 bnx2i_ep = ep->dd_data; 1271 shost = bnx2i_ep->hba->shost; 1272 hba = iscsi_host_priv(shost); 1273 if (bnx2i_adapter_ready(hba)) 1274 return NULL; 1275 1276 /* 1277 * user can override hw limit as long as it is within 1278 * the min/max. 1279 */ 1280 if (cmds_max > hba->max_sqes) 1281 cmds_max = hba->max_sqes; 1282 else if (cmds_max < BNX2I_SQ_WQES_MIN) 1283 cmds_max = BNX2I_SQ_WQES_MIN; 1284 1285 cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost, 1286 cmds_max, 0, sizeof(struct bnx2i_cmd), 1287 initial_cmdsn, ISCSI_MAX_TARGET); 1288 if (!cls_session) 1289 return NULL; 1290 1291 if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data)) 1292 goto session_teardown; 1293 return cls_session; 1294 1295session_teardown: 1296 iscsi_session_teardown(cls_session); 1297 return NULL; 1298} 1299 1300 1301/** 1302 * bnx2i_session_destroy - destroys iscsi session 1303 * @cls_session: pointer to iscsi cls session 1304 * 1305 * Destroys previously created iSCSI session instance and releases 1306 * all resources held by it 1307 */ 1308static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session) 1309{ 1310 struct iscsi_session *session = cls_session->dd_data; 1311 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 1312 struct bnx2i_hba *hba = iscsi_host_priv(shost); 1313 1314 bnx2i_destroy_cmd_pool(hba, session); 1315 iscsi_session_teardown(cls_session); 1316} 1317 1318 1319/** 1320 * bnx2i_conn_create - create iscsi connection instance 1321 * @cls_session: pointer to iscsi cls session 1322 * @cid: iscsi cid as per rfc (not NX2's CID terminology) 1323 * 1324 * Creates a new iSCSI connection instance for a given session 1325 */ 1326static struct iscsi_cls_conn * 1327bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) 1328{ 1329 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 1330 struct bnx2i_hba *hba = iscsi_host_priv(shost); 1331 struct bnx2i_conn *bnx2i_conn; 1332 struct iscsi_cls_conn *cls_conn; 1333 struct iscsi_conn *conn; 1334 1335 cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn), 1336 cid); 1337 if (!cls_conn) 1338 return NULL; 1339 conn = cls_conn->dd_data; 1340 1341 bnx2i_conn = conn->dd_data; 1342 bnx2i_conn->cls_conn = cls_conn; 1343 bnx2i_conn->hba = hba; 1344 /* 'ep' ptr will be assigned in bind() call */ 1345 bnx2i_conn->ep = NULL; 1346 init_completion(&bnx2i_conn->cmd_cleanup_cmpl); 1347 1348 if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) { 1349 iscsi_conn_printk(KERN_ALERT, conn, 1350 "conn_new: login resc alloc failed!!\n"); 1351 goto free_conn; 1352 } 1353 1354 return cls_conn; 1355 1356free_conn: 1357 iscsi_conn_teardown(cls_conn); 1358 return NULL; 1359} 1360 1361/** 1362 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together 1363 * @cls_session: pointer to iscsi cls session 1364 * @cls_conn: pointer to iscsi cls conn 1365 * @transport_fd: 64-bit EP handle 1366 * @is_leading: leading connection on this session? 1367 * 1368 * Binds together iSCSI session instance, iSCSI connection instance 1369 * and the TCP connection. This routine returns error code if 1370 * TCP connection does not belong on the device iSCSI sess/conn 1371 * is bound 1372 */ 1373static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session, 1374 struct iscsi_cls_conn *cls_conn, 1375 uint64_t transport_fd, int is_leading) 1376{ 1377 struct iscsi_conn *conn = cls_conn->dd_data; 1378 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1379 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 1380 struct bnx2i_hba *hba = iscsi_host_priv(shost); 1381 struct bnx2i_endpoint *bnx2i_ep; 1382 struct iscsi_endpoint *ep; 1383 int ret_code; 1384 1385 ep = iscsi_lookup_endpoint(transport_fd); 1386 if (!ep) 1387 return -EINVAL; 1388 1389 bnx2i_ep = ep->dd_data; 1390 if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) || 1391 (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD)) 1392 /* Peer disconnect via' FIN or RST */ 1393 return -EINVAL; 1394 1395 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) 1396 return -EINVAL; 1397 1398 if (bnx2i_ep->hba != hba) { 1399 /* Error - TCP connection does not belong to this device 1400 */ 1401 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data, 1402 "conn bind, ep=0x%p (%s) does not", 1403 bnx2i_ep, bnx2i_ep->hba->netdev->name); 1404 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data, 1405 "belong to hba (%s)\n", 1406 hba->netdev->name); 1407 return -EEXIST; 1408 } 1409 1410 bnx2i_ep->conn = bnx2i_conn; 1411 bnx2i_conn->ep = bnx2i_ep; 1412 bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid; 1413 bnx2i_conn->fw_cid = bnx2i_ep->ep_cid; 1414 1415 ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn, 1416 bnx2i_ep->ep_iscsi_cid); 1417 1418 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710 1419 * driver needs to explicitly replenish RQ index during setup. 1420 */ 1421 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) 1422 bnx2i_put_rq_buf(bnx2i_conn, 0); 1423 1424 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE); 1425 return ret_code; 1426} 1427 1428 1429/** 1430 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources 1431 * @cls_conn: pointer to iscsi cls conn 1432 * 1433 * Destroy an iSCSI connection instance and release memory resources held by 1434 * this connection 1435 */ 1436static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn) 1437{ 1438 struct iscsi_conn *conn = cls_conn->dd_data; 1439 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1440 struct Scsi_Host *shost; 1441 struct bnx2i_hba *hba; 1442 1443 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 1444 hba = iscsi_host_priv(shost); 1445 1446 bnx2i_conn_free_login_resources(hba, bnx2i_conn); 1447 iscsi_conn_teardown(cls_conn); 1448} 1449 1450 1451/** 1452 * bnx2i_conn_get_param - return iscsi connection parameter to caller 1453 * @cls_conn: pointer to iscsi cls conn 1454 * @param: parameter type identifier 1455 * @buf: buffer pointer 1456 * 1457 * returns iSCSI connection parameters 1458 */ 1459static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn, 1460 enum iscsi_param param, char *buf) 1461{ 1462 struct iscsi_conn *conn = cls_conn->dd_data; 1463 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1464 int len = 0; 1465 1466 switch (param) { 1467 case ISCSI_PARAM_CONN_PORT: 1468 if (bnx2i_conn->ep) 1469 len = sprintf(buf, "%hu\n", 1470 bnx2i_conn->ep->cm_sk->dst_port); 1471 break; 1472 case ISCSI_PARAM_CONN_ADDRESS: 1473 if (bnx2i_conn->ep) 1474 len = sprintf(buf, "%pI4\n", 1475 &bnx2i_conn->ep->cm_sk->dst_ip); 1476 break; 1477 default: 1478 return iscsi_conn_get_param(cls_conn, param, buf); 1479 } 1480 1481 return len; 1482} 1483 1484/** 1485 * bnx2i_host_get_param - returns host (adapter) related parameters 1486 * @shost: scsi host pointer 1487 * @param: parameter type identifier 1488 * @buf: buffer pointer 1489 */ 1490static int bnx2i_host_get_param(struct Scsi_Host *shost, 1491 enum iscsi_host_param param, char *buf) 1492{ 1493 struct bnx2i_hba *hba = iscsi_host_priv(shost); 1494 int len = 0; 1495 1496 switch (param) { 1497 case ISCSI_HOST_PARAM_HWADDRESS: 1498 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6); 1499 break; 1500 case ISCSI_HOST_PARAM_NETDEV_NAME: 1501 len = sprintf(buf, "%s\n", hba->netdev->name); 1502 break; 1503 case ISCSI_HOST_PARAM_IPADDRESS: { 1504 struct list_head *active_list = &hba->ep_active_list; 1505 1506 read_lock_bh(&hba->ep_rdwr_lock); 1507 if (!list_empty(&hba->ep_active_list)) { 1508 struct bnx2i_endpoint *bnx2i_ep; 1509 struct cnic_sock *csk; 1510 1511 bnx2i_ep = list_first_entry(active_list, 1512 struct bnx2i_endpoint, 1513 link); 1514 csk = bnx2i_ep->cm_sk; 1515 if (test_bit(SK_F_IPV6, &csk->flags)) 1516 len = sprintf(buf, "%pI6\n", csk->src_ip); 1517 else 1518 len = sprintf(buf, "%pI4\n", csk->src_ip); 1519 } 1520 read_unlock_bh(&hba->ep_rdwr_lock); 1521 break; 1522 } 1523 default: 1524 return iscsi_host_get_param(shost, param, buf); 1525 } 1526 return len; 1527} 1528 1529/** 1530 * bnx2i_conn_start - completes iscsi connection migration to FFP 1531 * @cls_conn: pointer to iscsi cls conn 1532 * 1533 * last call in FFP migration to handover iscsi conn to the driver 1534 */ 1535static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn) 1536{ 1537 struct iscsi_conn *conn = cls_conn->dd_data; 1538 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1539 1540 bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START; 1541 bnx2i_update_iscsi_conn(conn); 1542 1543 /* 1544 * this should normally not sleep for a long time so it should 1545 * not disrupt the caller. 1546 */ 1547 bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies; 1548 bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer; 1549 bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep; 1550 add_timer(&bnx2i_conn->ep->ofld_timer); 1551 /* update iSCSI context for this conn, wait for CNIC to complete */ 1552 wait_event_interruptible(bnx2i_conn->ep->ofld_wait, 1553 bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START); 1554 1555 if (signal_pending(current)) 1556 flush_signals(current); 1557 del_timer_sync(&bnx2i_conn->ep->ofld_timer); 1558 1559 iscsi_conn_start(cls_conn); 1560 return 0; 1561} 1562 1563 1564/** 1565 * bnx2i_conn_get_stats - returns iSCSI stats 1566 * @cls_conn: pointer to iscsi cls conn 1567 * @stats: pointer to iscsi statistic struct 1568 */ 1569static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn, 1570 struct iscsi_stats *stats) 1571{ 1572 struct iscsi_conn *conn = cls_conn->dd_data; 1573 1574 stats->txdata_octets = conn->txdata_octets; 1575 stats->rxdata_octets = conn->rxdata_octets; 1576 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 1577 stats->dataout_pdus = conn->dataout_pdus_cnt; 1578 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 1579 stats->datain_pdus = conn->datain_pdus_cnt; 1580 stats->r2t_pdus = conn->r2t_pdus_cnt; 1581 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 1582 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 1583 stats->custom_length = 3; 1584 strcpy(stats->custom[2].desc, "eh_abort_cnt"); 1585 stats->custom[2].value = conn->eh_abort_cnt; 1586 stats->digest_err = 0; 1587 stats->timeout_err = 0; 1588 stats->custom_length = 0; 1589} 1590 1591 1592/** 1593 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices 1594 * @dst_addr: target IP address 1595 * 1596 * check if route resolves to BNX2 device 1597 */ 1598static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr) 1599{ 1600 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr; 1601 struct bnx2i_hba *hba; 1602 struct cnic_dev *cnic = NULL; 1603 1604 bnx2i_reg_dev_all(); 1605 1606 hba = get_adapter_list_head(); 1607 if (hba && hba->cnic) 1608 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI); 1609 if (!cnic) { 1610 printk(KERN_ALERT "bnx2i: no route," 1611 "can't connect using cnic\n"); 1612 goto no_nx2_route; 1613 } 1614 hba = bnx2i_find_hba_for_cnic(cnic); 1615 if (!hba) 1616 goto no_nx2_route; 1617 1618 if (bnx2i_adapter_ready(hba)) { 1619 printk(KERN_ALERT "bnx2i: check route, hba not found\n"); 1620 goto no_nx2_route; 1621 } 1622 if (hba->netdev->mtu > hba->mtu_supported) { 1623 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n", 1624 hba->netdev->name, hba->netdev->mtu); 1625 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n", 1626 hba->mtu_supported); 1627 goto no_nx2_route; 1628 } 1629 return hba; 1630no_nx2_route: 1631 return NULL; 1632} 1633 1634 1635/** 1636 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources 1637 * @hba: pointer to adapter instance 1638 * @ep: endpoint (transport indentifier) structure 1639 * 1640 * destroys cm_sock structure and on chip iscsi context 1641 */ 1642static int bnx2i_tear_down_conn(struct bnx2i_hba *hba, 1643 struct bnx2i_endpoint *ep) 1644{ 1645 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) 1646 hba->cnic->cm_destroy(ep->cm_sk); 1647 1648 if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state)) 1649 ep->state = EP_STATE_DISCONN_COMPL; 1650 1651 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) && 1652 ep->state == EP_STATE_DISCONN_TIMEDOUT) { 1653 printk(KERN_ALERT "bnx2i - ERROR - please submit GRC Dump," 1654 " NW/PCIe trace, driver msgs to developers" 1655 " for analysis\n"); 1656 return 1; 1657 } 1658 1659 ep->state = EP_STATE_CLEANUP_START; 1660 init_timer(&ep->ofld_timer); 1661 ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies; 1662 ep->ofld_timer.function = bnx2i_ep_ofld_timer; 1663 ep->ofld_timer.data = (unsigned long) ep; 1664 add_timer(&ep->ofld_timer); 1665 1666 bnx2i_ep_destroy_list_add(hba, ep); 1667 1668 /* destroy iSCSI context, wait for it to complete */ 1669 bnx2i_send_conn_destroy(hba, ep); 1670 wait_event_interruptible(ep->ofld_wait, 1671 (ep->state != EP_STATE_CLEANUP_START)); 1672 1673 if (signal_pending(current)) 1674 flush_signals(current); 1675 del_timer_sync(&ep->ofld_timer); 1676 1677 bnx2i_ep_destroy_list_del(hba, ep); 1678 1679 if (ep->state != EP_STATE_CLEANUP_CMPL) 1680 /* should never happen */ 1681 printk(KERN_ALERT "bnx2i - conn destroy failed\n"); 1682 1683 return 0; 1684} 1685 1686 1687/** 1688 * bnx2i_ep_connect - establish TCP connection to target portal 1689 * @shost: scsi host 1690 * @dst_addr: target IP address 1691 * @non_blocking: blocking or non-blocking call 1692 * 1693 * this routine initiates the TCP/IP connection by invoking Option-2 i/f 1694 * with l5_core and the CNIC. This is a multi-step process of resolving 1695 * route to target, create a iscsi connection context, handshaking with 1696 * CNIC module to create/initialize the socket struct and finally 1697 * sending down option-2 request to complete TCP 3-way handshake 1698 */ 1699static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost, 1700 struct sockaddr *dst_addr, 1701 int non_blocking) 1702{ 1703 u32 iscsi_cid = BNX2I_CID_RESERVED; 1704 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr; 1705 struct sockaddr_in6 *desti6; 1706 struct bnx2i_endpoint *bnx2i_ep; 1707 struct bnx2i_hba *hba; 1708 struct cnic_dev *cnic; 1709 struct cnic_sockaddr saddr; 1710 struct iscsi_endpoint *ep; 1711 int rc = 0; 1712 1713 if (shost) { 1714 /* driver is given scsi host to work with */ 1715 hba = iscsi_host_priv(shost); 1716 /* Register the device with cnic if not already done so */ 1717 bnx2i_register_device(hba); 1718 } else 1719 /* 1720 * check if the given destination can be reached through 1721 * a iscsi capable NetXtreme2 device 1722 */ 1723 hba = bnx2i_check_route(dst_addr); 1724 1725 if (!hba || test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state)) { 1726 rc = -EINVAL; 1727 goto nohba; 1728 } 1729 1730 cnic = hba->cnic; 1731 mutex_lock(&hba->net_dev_lock); 1732 ep = bnx2i_alloc_ep(hba); 1733 if (!ep) { 1734 rc = -ENOMEM; 1735 goto check_busy; 1736 } 1737 bnx2i_ep = ep->dd_data; 1738 1739 if (bnx2i_adapter_ready(hba)) { 1740 rc = -EPERM; 1741 goto net_if_down; 1742 } 1743 1744 bnx2i_ep->num_active_cmds = 0; 1745 iscsi_cid = bnx2i_alloc_iscsi_cid(hba); 1746 if (iscsi_cid == -1) { 1747 printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n"); 1748 rc = -ENOMEM; 1749 goto iscsi_cid_err; 1750 } 1751 bnx2i_ep->hba_age = hba->age; 1752 1753 rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep); 1754 if (rc != 0) { 1755 printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n"); 1756 rc = -ENOMEM; 1757 goto qp_resc_err; 1758 } 1759 1760 bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid; 1761 bnx2i_ep->state = EP_STATE_OFLD_START; 1762 bnx2i_ep_ofld_list_add(hba, bnx2i_ep); 1763 1764 init_timer(&bnx2i_ep->ofld_timer); 1765 bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies; 1766 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer; 1767 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep; 1768 add_timer(&bnx2i_ep->ofld_timer); 1769 1770 bnx2i_send_conn_ofld_req(hba, bnx2i_ep); 1771 1772 /* Wait for CNIC hardware to setup conn context and return 'cid' */ 1773 wait_event_interruptible(bnx2i_ep->ofld_wait, 1774 bnx2i_ep->state != EP_STATE_OFLD_START); 1775 1776 if (signal_pending(current)) 1777 flush_signals(current); 1778 del_timer_sync(&bnx2i_ep->ofld_timer); 1779 1780 bnx2i_ep_ofld_list_del(hba, bnx2i_ep); 1781 1782 if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) { 1783 rc = -ENOSPC; 1784 goto conn_failed; 1785 } 1786 1787 rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid, 1788 iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep); 1789 if (rc) { 1790 rc = -EINVAL; 1791 goto conn_failed; 1792 } 1793 1794 bnx2i_ep->cm_sk->rcv_buf = 256 * 1024; 1795 bnx2i_ep->cm_sk->snd_buf = 256 * 1024; 1796 clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags); 1797 1798 memset(&saddr, 0, sizeof(saddr)); 1799 if (dst_addr->sa_family == AF_INET) { 1800 desti = (struct sockaddr_in *) dst_addr; 1801 saddr.remote.v4 = *desti; 1802 saddr.local.v4.sin_family = desti->sin_family; 1803 } else if (dst_addr->sa_family == AF_INET6) { 1804 desti6 = (struct sockaddr_in6 *) dst_addr; 1805 saddr.remote.v6 = *desti6; 1806 saddr.local.v6.sin6_family = desti6->sin6_family; 1807 } 1808 1809 bnx2i_ep->timestamp = jiffies; 1810 bnx2i_ep->state = EP_STATE_CONNECT_START; 1811 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) { 1812 rc = -EINVAL; 1813 goto conn_failed; 1814 } else 1815 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr); 1816 if (rc) 1817 goto release_ep; 1818 1819 bnx2i_ep_active_list_add(hba, bnx2i_ep); 1820 1821 if (bnx2i_map_ep_dbell_regs(bnx2i_ep)) 1822 goto del_active_ep; 1823 1824 mutex_unlock(&hba->net_dev_lock); 1825 return ep; 1826 1827del_active_ep: 1828 bnx2i_ep_active_list_del(hba, bnx2i_ep); 1829release_ep: 1830 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) { 1831 mutex_unlock(&hba->net_dev_lock); 1832 return ERR_PTR(rc); 1833 } 1834conn_failed: 1835net_if_down: 1836iscsi_cid_err: 1837 bnx2i_free_qp_resc(hba, bnx2i_ep); 1838qp_resc_err: 1839 bnx2i_free_ep(ep); 1840check_busy: 1841 mutex_unlock(&hba->net_dev_lock); 1842nohba: 1843 bnx2i_unreg_dev_all(); 1844 return ERR_PTR(rc); 1845} 1846 1847 1848/** 1849 * bnx2i_ep_poll - polls for TCP connection establishement 1850 * @ep: TCP connection (endpoint) handle 1851 * @timeout_ms: timeout value in milli secs 1852 * 1853 * polls for TCP connect request to complete 1854 */ 1855static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 1856{ 1857 struct bnx2i_endpoint *bnx2i_ep; 1858 int rc = 0; 1859 1860 bnx2i_ep = ep->dd_data; 1861 if ((bnx2i_ep->state == EP_STATE_IDLE) || 1862 (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) || 1863 (bnx2i_ep->state == EP_STATE_OFLD_FAILED)) 1864 return -1; 1865 if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL) 1866 return 1; 1867 1868 rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait, 1869 ((bnx2i_ep->state == 1870 EP_STATE_OFLD_FAILED) || 1871 (bnx2i_ep->state == 1872 EP_STATE_CONNECT_FAILED) || 1873 (bnx2i_ep->state == 1874 EP_STATE_CONNECT_COMPL)), 1875 msecs_to_jiffies(timeout_ms)); 1876 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED) 1877 rc = -1; 1878 1879 if (rc > 0) 1880 return 1; 1881 else if (!rc) 1882 return 0; /* timeout */ 1883 else 1884 return rc; 1885} 1886 1887 1888/** 1889 * bnx2i_ep_tcp_conn_active - check EP state transition 1890 * @ep: endpoint pointer 1891 * 1892 * check if underlying TCP connection is active 1893 */ 1894static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep) 1895{ 1896 int ret; 1897 int cnic_dev_10g = 0; 1898 1899 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) 1900 cnic_dev_10g = 1; 1901 1902 switch (bnx2i_ep->state) { 1903 case EP_STATE_CONNECT_START: 1904 case EP_STATE_CLEANUP_FAILED: 1905 case EP_STATE_OFLD_FAILED: 1906 case EP_STATE_DISCONN_TIMEDOUT: 1907 ret = 0; 1908 break; 1909 case EP_STATE_CONNECT_COMPL: 1910 case EP_STATE_ULP_UPDATE_START: 1911 case EP_STATE_ULP_UPDATE_COMPL: 1912 case EP_STATE_TCP_FIN_RCVD: 1913 case EP_STATE_LOGOUT_SENT: 1914 case EP_STATE_LOGOUT_RESP_RCVD: 1915 case EP_STATE_ULP_UPDATE_FAILED: 1916 ret = 1; 1917 break; 1918 case EP_STATE_TCP_RST_RCVD: 1919 ret = 0; 1920 break; 1921 case EP_STATE_CONNECT_FAILED: 1922 if (cnic_dev_10g) 1923 ret = 1; 1924 else 1925 ret = 0; 1926 break; 1927 default: 1928 ret = 0; 1929 } 1930 1931 return ret; 1932} 1933 1934 1935/* 1936 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw 1937 * @ep: TCP connection (bnx2i endpoint) handle 1938 * 1939 * executes TCP connection teardown process 1940 */ 1941int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep) 1942{ 1943 struct bnx2i_hba *hba = bnx2i_ep->hba; 1944 struct cnic_dev *cnic; 1945 struct iscsi_session *session = NULL; 1946 struct iscsi_conn *conn = NULL; 1947 int ret = 0; 1948 int close = 0; 1949 int close_ret = 0; 1950 1951 if (!hba) 1952 return 0; 1953 1954 cnic = hba->cnic; 1955 if (!cnic) 1956 return 0; 1957 1958 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep)) 1959 goto destroy_conn; 1960 1961 if (bnx2i_ep->conn) { 1962 conn = bnx2i_ep->conn->cls_conn->dd_data; 1963 session = conn->session; 1964 } 1965 1966 init_timer(&bnx2i_ep->ofld_timer); 1967 bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies; 1968 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer; 1969 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep; 1970 add_timer(&bnx2i_ep->ofld_timer); 1971 1972 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) 1973 goto out; 1974 1975 if (session) { 1976 spin_lock_bh(&session->lock); 1977 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) { 1978 if (session->state == ISCSI_STATE_LOGGING_OUT) { 1979 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) { 1980 /* Logout sent, but no resp */ 1981 printk(KERN_ALERT "bnx2i - WARNING " 1982 "logout response was not " 1983 "received!\n"); 1984 } else if (bnx2i_ep->state == 1985 EP_STATE_LOGOUT_RESP_RCVD) 1986 close = 1; 1987 } 1988 } else 1989 close = 1; 1990 1991 spin_unlock_bh(&session->lock); 1992 } 1993 1994 bnx2i_ep->state = EP_STATE_DISCONN_START; 1995 1996 if (close) 1997 close_ret = cnic->cm_close(bnx2i_ep->cm_sk); 1998 else 1999 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk); 2000 2001 if (close_ret) 2002 bnx2i_ep->state = EP_STATE_DISCONN_COMPL; 2003 2004 /* wait for option-2 conn teardown */ 2005 wait_event_interruptible(bnx2i_ep->ofld_wait, 2006 bnx2i_ep->state != EP_STATE_DISCONN_START); 2007 2008 if (signal_pending(current)) 2009 flush_signals(current); 2010 del_timer_sync(&bnx2i_ep->ofld_timer); 2011 2012destroy_conn: 2013 bnx2i_ep_active_list_del(hba, bnx2i_ep); 2014 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) 2015 ret = -EINVAL; 2016out: 2017 bnx2i_ep->state = EP_STATE_IDLE; 2018 return ret; 2019} 2020 2021 2022/** 2023 * bnx2i_ep_disconnect - executes TCP connection teardown process 2024 * @ep: TCP connection (iscsi endpoint) handle 2025 * 2026 * executes TCP connection teardown process 2027 */ 2028static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep) 2029{ 2030 struct bnx2i_endpoint *bnx2i_ep; 2031 struct bnx2i_conn *bnx2i_conn = NULL; 2032 struct iscsi_conn *conn = NULL; 2033 struct bnx2i_hba *hba; 2034 2035 bnx2i_ep = ep->dd_data; 2036 2037 /* driver should not attempt connection cleanup until TCP_CONNECT 2038 * completes either successfully or fails. Timeout is 9-secs, so 2039 * wait for it to complete 2040 */ 2041 while ((bnx2i_ep->state == EP_STATE_CONNECT_START) && 2042 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ))) 2043 msleep(250); 2044 2045 if (bnx2i_ep->conn) { 2046 bnx2i_conn = bnx2i_ep->conn; 2047 conn = bnx2i_conn->cls_conn->dd_data; 2048 iscsi_suspend_queue(conn); 2049 } 2050 hba = bnx2i_ep->hba; 2051 2052 mutex_lock(&hba->net_dev_lock); 2053 2054 if (bnx2i_ep->state == EP_STATE_IDLE) 2055 goto return_bnx2i_ep; 2056 2057 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) 2058 goto free_resc; 2059 2060 if (bnx2i_ep->hba_age != hba->age) 2061 goto free_resc; 2062 2063 /* Do all chip cleanup here */ 2064 if (bnx2i_hw_ep_disconnect(bnx2i_ep)) { 2065 mutex_unlock(&hba->net_dev_lock); 2066 return; 2067 } 2068free_resc: 2069 bnx2i_free_qp_resc(hba, bnx2i_ep); 2070return_bnx2i_ep: 2071 if (bnx2i_conn) 2072 bnx2i_conn->ep = NULL; 2073 2074 bnx2i_free_ep(ep); 2075 mutex_unlock(&hba->net_dev_lock); 2076 if (!hba->ofld_conns_active) 2077 bnx2i_unreg_dev_all(); 2078 2079 wake_up_interruptible(&hba->eh_wait); 2080} 2081 2082 2083/** 2084 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler 2085 * @buf: pointer to buffer containing iscsi path message 2086 * 2087 */ 2088static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params) 2089{ 2090 struct bnx2i_hba *hba = iscsi_host_priv(shost); 2091 char *buf = (char *) params; 2092 u16 len = sizeof(*params); 2093 2094 /* handled by cnic driver */ 2095 hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf, 2096 len); 2097 2098 return 0; 2099} 2100 2101 2102/* 2103 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template 2104 * used while registering with the scsi host and iSCSI transport module. 2105 */ 2106static struct scsi_host_template bnx2i_host_template = { 2107 .module = THIS_MODULE, 2108 .name = "Broadcom Offload iSCSI Initiator", 2109 .proc_name = "bnx2i", 2110 .queuecommand = iscsi_queuecommand, 2111 .eh_abort_handler = iscsi_eh_abort, 2112 .eh_device_reset_handler = iscsi_eh_device_reset, 2113 .eh_target_reset_handler = iscsi_eh_recover_target, 2114 .change_queue_depth = iscsi_change_queue_depth, 2115 .can_queue = 1024, 2116 .max_sectors = 127, 2117 .cmd_per_lun = 32, 2118 .this_id = -1, 2119 .use_clustering = ENABLE_CLUSTERING, 2120 .sg_tablesize = ISCSI_MAX_BDS_PER_CMD, 2121 .shost_attrs = bnx2i_dev_attributes, 2122}; 2123 2124struct iscsi_transport bnx2i_iscsi_transport = { 2125 .owner = THIS_MODULE, 2126 .name = "bnx2i", 2127 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | 2128 CAP_MULTI_R2T | CAP_DATADGST | 2129 CAP_DATA_PATH_OFFLOAD, 2130 .param_mask = ISCSI_MAX_RECV_DLENGTH | 2131 ISCSI_MAX_XMIT_DLENGTH | 2132 ISCSI_HDRDGST_EN | 2133 ISCSI_DATADGST_EN | 2134 ISCSI_INITIAL_R2T_EN | 2135 ISCSI_MAX_R2T | 2136 ISCSI_IMM_DATA_EN | 2137 ISCSI_FIRST_BURST | 2138 ISCSI_MAX_BURST | 2139 ISCSI_PDU_INORDER_EN | 2140 ISCSI_DATASEQ_INORDER_EN | 2141 ISCSI_ERL | 2142 ISCSI_CONN_PORT | 2143 ISCSI_CONN_ADDRESS | 2144 ISCSI_EXP_STATSN | 2145 ISCSI_PERSISTENT_PORT | 2146 ISCSI_PERSISTENT_ADDRESS | 2147 ISCSI_TARGET_NAME | ISCSI_TPGT | 2148 ISCSI_USERNAME | ISCSI_PASSWORD | 2149 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | 2150 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | 2151 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO | 2152 ISCSI_PING_TMO | ISCSI_RECV_TMO | 2153 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, 2154 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | 2155 ISCSI_HOST_NETDEV_NAME, 2156 .create_session = bnx2i_session_create, 2157 .destroy_session = bnx2i_session_destroy, 2158 .create_conn = bnx2i_conn_create, 2159 .bind_conn = bnx2i_conn_bind, 2160 .destroy_conn = bnx2i_conn_destroy, 2161 .set_param = iscsi_set_param, 2162 .get_conn_param = bnx2i_conn_get_param, 2163 .get_session_param = iscsi_session_get_param, 2164 .get_host_param = bnx2i_host_get_param, 2165 .start_conn = bnx2i_conn_start, 2166 .stop_conn = iscsi_conn_stop, 2167 .send_pdu = iscsi_conn_send_pdu, 2168 .xmit_task = bnx2i_task_xmit, 2169 .get_stats = bnx2i_conn_get_stats, 2170 /* TCP connect - disconnect - option-2 interface calls */ 2171 .ep_connect = bnx2i_ep_connect, 2172 .ep_poll = bnx2i_ep_poll, 2173 .ep_disconnect = bnx2i_ep_disconnect, 2174 .set_path = bnx2i_nl_set_path, 2175 /* Error recovery timeout call */ 2176 .session_recovery_timedout = iscsi_session_recovery_timedout, 2177 .cleanup_task = bnx2i_cleanup_task, 2178}; 2179