1 /* 2 * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver. 3 * 4 * Copyright (c) 2006 - 2010 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 * Maintained by: Eddie Wai (eddie.wai@broadcom.com) 14 */ 15 16 #include <linux/slab.h> 17 #include <scsi/scsi_tcq.h> 18 #include <scsi/libiscsi.h> 19 #include "bnx2i.h" 20 21 struct scsi_transport_template *bnx2i_scsi_xport_template; 22 struct iscsi_transport bnx2i_iscsi_transport; 23 static struct scsi_host_template bnx2i_host_template; 24 25 /* 26 * Global endpoint resource info 27 */ 28 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */ 29 30 31 static int bnx2i_adapter_ready(struct bnx2i_hba *hba) 32 { 33 int retval = 0; 34 35 if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) || 36 test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) || 37 test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state)) 38 retval = -EPERM; 39 return retval; 40 } 41 42 /** 43 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks 44 * @cmd: iscsi cmd struct pointer 45 * @buf_off: absolute buffer offset 46 * @start_bd_off: u32 pointer to return the offset within the BD 47 * indicated by 'start_bd_idx' on which 'buf_off' falls 48 * @start_bd_idx: index of the BD on which 'buf_off' falls 49 * 50 * identifies & marks various bd info for scsi command's imm data, 51 * unsolicited data and the first solicited data seq. 52 */ 53 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off, 54 u32 *start_bd_off, u32 *start_bd_idx) 55 { 56 struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl; 57 u32 cur_offset = 0; 58 u32 cur_bd_idx = 0; 59 60 if (buf_off) { 61 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) { 62 cur_offset += bd_tbl->buffer_length; 63 cur_bd_idx++; 64 bd_tbl++; 65 } 66 } 67 68 *start_bd_off = buf_off - cur_offset; 69 *start_bd_idx = cur_bd_idx; 70 } 71 72 /** 73 * bnx2i_setup_write_cmd_bd_info - sets up BD various information 74 * @task: transport layer's cmd struct pointer 75 * 76 * identifies & marks various bd info for scsi command's immediate data, 77 * unsolicited data and first solicited data seq which includes BD start 78 * index & BD buf off. his function takes into account iscsi parameter such 79 * as immediate data and unsolicited data is support on this connection. 80 */ 81 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task) 82 { 83 struct bnx2i_cmd *cmd = task->dd_data; 84 u32 start_bd_offset; 85 u32 start_bd_idx; 86 u32 buffer_offset = 0; 87 u32 cmd_len = cmd->req.total_data_transfer_length; 88 89 /* if ImmediateData is turned off & IntialR2T is turned on, 90 * there will be no immediate or unsolicited data, just return. 91 */ 92 if (!iscsi_task_has_unsol_data(task) && !task->imm_count) 93 return; 94 95 /* Immediate data */ 96 buffer_offset += task->imm_count; 97 if (task->imm_count == cmd_len) 98 return; 99 100 if (iscsi_task_has_unsol_data(task)) { 101 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset, 102 &start_bd_offset, &start_bd_idx); 103 cmd->req.ud_buffer_offset = start_bd_offset; 104 cmd->req.ud_start_bd_index = start_bd_idx; 105 buffer_offset += task->unsol_r2t.data_length; 106 } 107 108 if (buffer_offset != cmd_len) { 109 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset, 110 &start_bd_offset, &start_bd_idx); 111 if ((start_bd_offset > task->conn->session->first_burst) || 112 (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) { 113 int i = 0; 114 115 iscsi_conn_printk(KERN_ALERT, task->conn, 116 "bnx2i- error, buf offset 0x%x " 117 "bd_valid %d use_sg %d\n", 118 buffer_offset, cmd->io_tbl.bd_valid, 119 scsi_sg_count(cmd->scsi_cmd)); 120 for (i = 0; i < cmd->io_tbl.bd_valid; i++) 121 iscsi_conn_printk(KERN_ALERT, task->conn, 122 "bnx2i err, bd[%d]: len %x\n", 123 i, cmd->io_tbl.bd_tbl[i].\ 124 buffer_length); 125 } 126 cmd->req.sd_buffer_offset = start_bd_offset; 127 cmd->req.sd_start_bd_index = start_bd_idx; 128 } 129 } 130 131 132 133 /** 134 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table 135 * @hba: adapter instance 136 * @cmd: iscsi cmd struct pointer 137 * 138 * map SG list 139 */ 140 static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) 141 { 142 struct scsi_cmnd *sc = cmd->scsi_cmd; 143 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; 144 struct scatterlist *sg; 145 int byte_count = 0; 146 int bd_count = 0; 147 int sg_count; 148 int sg_len; 149 u64 addr; 150 int i; 151 152 BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD); 153 154 sg_count = scsi_dma_map(sc); 155 156 scsi_for_each_sg(sc, sg, sg_count, i) { 157 sg_len = sg_dma_len(sg); 158 addr = (u64) sg_dma_address(sg); 159 bd[bd_count].buffer_addr_lo = addr & 0xffffffff; 160 bd[bd_count].buffer_addr_hi = addr >> 32; 161 bd[bd_count].buffer_length = sg_len; 162 bd[bd_count].flags = 0; 163 if (bd_count == 0) 164 bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN; 165 166 byte_count += sg_len; 167 bd_count++; 168 } 169 170 if (bd_count) 171 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN; 172 173 BUG_ON(byte_count != scsi_bufflen(sc)); 174 return bd_count; 175 } 176 177 /** 178 * bnx2i_iscsi_map_sg_list - maps SG list 179 * @cmd: iscsi cmd struct pointer 180 * 181 * creates BD list table for the command 182 */ 183 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd) 184 { 185 int bd_count; 186 187 bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd); 188 if (!bd_count) { 189 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; 190 191 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0; 192 bd[0].buffer_length = bd[0].flags = 0; 193 } 194 cmd->io_tbl.bd_valid = bd_count; 195 } 196 197 198 /** 199 * bnx2i_iscsi_unmap_sg_list - unmaps SG list 200 * @cmd: iscsi cmd struct pointer 201 * 202 * unmap IO buffers and invalidate the BD table 203 */ 204 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd) 205 { 206 struct scsi_cmnd *sc = cmd->scsi_cmd; 207 208 if (cmd->io_tbl.bd_valid && sc) { 209 scsi_dma_unmap(sc); 210 cmd->io_tbl.bd_valid = 0; 211 } 212 } 213 214 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd) 215 { 216 memset(&cmd->req, 0x00, sizeof(cmd->req)); 217 cmd->req.op_code = 0xFF; 218 cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma; 219 cmd->req.bd_list_addr_hi = 220 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32); 221 222 } 223 224 225 /** 226 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid' 227 * @hba: pointer to adapter instance 228 * @conn: pointer to iscsi connection 229 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) 230 * 231 * update iscsi cid table entry with connection pointer. This enables 232 * driver to quickly get hold of connection structure pointer in 233 * completion/interrupt thread using iscsi context ID 234 */ 235 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba, 236 struct bnx2i_conn *bnx2i_conn, 237 u32 iscsi_cid) 238 { 239 if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) { 240 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, 241 "conn bind - entry #%d not free\n", iscsi_cid); 242 return -EBUSY; 243 } 244 245 hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn; 246 return 0; 247 } 248 249 250 /** 251 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr 252 * @hba: pointer to adapter instance 253 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) 254 */ 255 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba, 256 u16 iscsi_cid) 257 { 258 if (!hba->cid_que.conn_cid_tbl) { 259 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n"); 260 return NULL; 261 262 } else if (iscsi_cid >= hba->max_active_conns) { 263 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid); 264 return NULL; 265 } 266 return hba->cid_que.conn_cid_tbl[iscsi_cid]; 267 } 268 269 270 /** 271 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool 272 * @hba: pointer to adapter instance 273 */ 274 static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba) 275 { 276 int idx; 277 278 if (!hba->cid_que.cid_free_cnt) 279 return -1; 280 281 idx = hba->cid_que.cid_q_cons_idx; 282 hba->cid_que.cid_q_cons_idx++; 283 if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx) 284 hba->cid_que.cid_q_cons_idx = 0; 285 286 hba->cid_que.cid_free_cnt--; 287 return hba->cid_que.cid_que[idx]; 288 } 289 290 291 /** 292 * bnx2i_free_iscsi_cid - returns tcp port to free list 293 * @hba: pointer to adapter instance 294 * @iscsi_cid: iscsi context ID to free 295 */ 296 static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid) 297 { 298 int idx; 299 300 if (iscsi_cid == (u16) -1) 301 return; 302 303 hba->cid_que.cid_free_cnt++; 304 305 idx = hba->cid_que.cid_q_prod_idx; 306 hba->cid_que.cid_que[idx] = iscsi_cid; 307 hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL; 308 hba->cid_que.cid_q_prod_idx++; 309 if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx) 310 hba->cid_que.cid_q_prod_idx = 0; 311 } 312 313 314 /** 315 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue 316 * @hba: pointer to adapter instance 317 * 318 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table, 319 * and initialize table attributes 320 */ 321 static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba) 322 { 323 int mem_size; 324 int i; 325 326 mem_size = hba->max_active_conns * sizeof(u32); 327 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 328 329 hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL); 330 if (!hba->cid_que.cid_que_base) 331 return -ENOMEM; 332 333 mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *); 334 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; 335 hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL); 336 if (!hba->cid_que.conn_cid_tbl) { 337 kfree(hba->cid_que.cid_que_base); 338 hba->cid_que.cid_que_base = NULL; 339 return -ENOMEM; 340 } 341 342 hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base; 343 hba->cid_que.cid_q_prod_idx = 0; 344 hba->cid_que.cid_q_cons_idx = 0; 345 hba->cid_que.cid_q_max_idx = hba->max_active_conns; 346 hba->cid_que.cid_free_cnt = hba->max_active_conns; 347 348 for (i = 0; i < hba->max_active_conns; i++) { 349 hba->cid_que.cid_que[i] = i; 350 hba->cid_que.conn_cid_tbl[i] = NULL; 351 } 352 return 0; 353 } 354 355 356 /** 357 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources 358 * @hba: pointer to adapter instance 359 */ 360 static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba) 361 { 362 kfree(hba->cid_que.cid_que_base); 363 hba->cid_que.cid_que_base = NULL; 364 365 kfree(hba->cid_que.conn_cid_tbl); 366 hba->cid_que.conn_cid_tbl = NULL; 367 } 368 369 370 /** 371 * bnx2i_alloc_ep - allocates ep structure from global pool 372 * @hba: pointer to adapter instance 373 * 374 * routine allocates a free endpoint structure from global pool and 375 * a tcp port to be used for this connection. Global resource lock, 376 * 'bnx2i_resc_lock' is held while accessing shared global data structures 377 */ 378 static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba) 379 { 380 struct iscsi_endpoint *ep; 381 struct bnx2i_endpoint *bnx2i_ep; 382 u32 ec_div; 383 384 ep = iscsi_create_endpoint(sizeof(*bnx2i_ep)); 385 if (!ep) { 386 printk(KERN_ERR "bnx2i: Could not allocate ep\n"); 387 return NULL; 388 } 389 390 bnx2i_ep = ep->dd_data; 391 bnx2i_ep->cls_ep = ep; 392 INIT_LIST_HEAD(&bnx2i_ep->link); 393 bnx2i_ep->state = EP_STATE_IDLE; 394 bnx2i_ep->ep_iscsi_cid = (u16) -1; 395 bnx2i_ep->hba = hba; 396 bnx2i_ep->hba_age = hba->age; 397 398 ec_div = event_coal_div; 399 while (ec_div >>= 1) 400 bnx2i_ep->ec_shift += 1; 401 402 hba->ofld_conns_active++; 403 init_waitqueue_head(&bnx2i_ep->ofld_wait); 404 return ep; 405 } 406 407 408 /** 409 * bnx2i_free_ep - free endpoint 410 * @ep: pointer to iscsi endpoint structure 411 */ 412 static void bnx2i_free_ep(struct iscsi_endpoint *ep) 413 { 414 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data; 415 unsigned long flags; 416 417 spin_lock_irqsave(&bnx2i_resc_lock, flags); 418 bnx2i_ep->state = EP_STATE_IDLE; 419 bnx2i_ep->hba->ofld_conns_active--; 420 421 if (bnx2i_ep->ep_iscsi_cid != (u16) -1) 422 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid); 423 424 if (bnx2i_ep->conn) { 425 bnx2i_ep->conn->ep = NULL; 426 bnx2i_ep->conn = NULL; 427 } 428 429 bnx2i_ep->hba = NULL; 430 spin_unlock_irqrestore(&bnx2i_resc_lock, flags); 431 iscsi_destroy_endpoint(ep); 432 } 433 434 435 /** 436 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command 437 * @hba: adapter instance pointer 438 * @session: iscsi session pointer 439 * @cmd: iscsi command structure 440 */ 441 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session, 442 struct bnx2i_cmd *cmd) 443 { 444 struct io_bdt *io = &cmd->io_tbl; 445 struct iscsi_bd *bd; 446 447 io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, 448 ISCSI_MAX_BDS_PER_CMD * sizeof(*bd), 449 &io->bd_tbl_dma, GFP_KERNEL); 450 if (!io->bd_tbl) { 451 iscsi_session_printk(KERN_ERR, session, "Could not " 452 "allocate bdt.\n"); 453 return -ENOMEM; 454 } 455 io->bd_valid = 0; 456 return 0; 457 } 458 459 /** 460 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table 461 * @hba: adapter instance pointer 462 * @session: iscsi session pointer 463 * @cmd: iscsi command structure 464 */ 465 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba, 466 struct iscsi_session *session) 467 { 468 int i; 469 470 for (i = 0; i < session->cmds_max; i++) { 471 struct iscsi_task *task = session->cmds[i]; 472 struct bnx2i_cmd *cmd = task->dd_data; 473 474 if (cmd->io_tbl.bd_tbl) 475 dma_free_coherent(&hba->pcidev->dev, 476 ISCSI_MAX_BDS_PER_CMD * 477 sizeof(struct iscsi_bd), 478 cmd->io_tbl.bd_tbl, 479 cmd->io_tbl.bd_tbl_dma); 480 } 481 482 } 483 484 485 /** 486 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session 487 * @hba: adapter instance pointer 488 * @session: iscsi session pointer 489 */ 490 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba, 491 struct iscsi_session *session) 492 { 493 int i; 494 495 for (i = 0; i < session->cmds_max; i++) { 496 struct iscsi_task *task = session->cmds[i]; 497 struct bnx2i_cmd *cmd = task->dd_data; 498 499 task->hdr = &cmd->hdr; 500 task->hdr_max = sizeof(struct iscsi_hdr); 501 502 if (bnx2i_alloc_bdt(hba, session, cmd)) 503 goto free_bdts; 504 } 505 506 return 0; 507 508 free_bdts: 509 bnx2i_destroy_cmd_pool(hba, session); 510 return -ENOMEM; 511 } 512 513 514 /** 515 * bnx2i_setup_mp_bdt - allocate BD table resources 516 * @hba: pointer to adapter structure 517 * 518 * Allocate memory for dummy buffer and associated BD 519 * table to be used by middle path (MP) requests 520 */ 521 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba) 522 { 523 int rc = 0; 524 struct iscsi_bd *mp_bdt; 525 u64 addr; 526 527 hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, 528 &hba->mp_bd_dma, GFP_KERNEL); 529 if (!hba->mp_bd_tbl) { 530 printk(KERN_ERR "unable to allocate Middle Path BDT\n"); 531 rc = -1; 532 goto out; 533 } 534 535 hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, 536 &hba->dummy_buf_dma, GFP_KERNEL); 537 if (!hba->dummy_buffer) { 538 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n"); 539 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 540 hba->mp_bd_tbl, hba->mp_bd_dma); 541 hba->mp_bd_tbl = NULL; 542 rc = -1; 543 goto out; 544 } 545 546 mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl; 547 addr = (unsigned long) hba->dummy_buf_dma; 548 mp_bdt->buffer_addr_lo = addr & 0xffffffff; 549 mp_bdt->buffer_addr_hi = addr >> 32; 550 mp_bdt->buffer_length = PAGE_SIZE; 551 mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN | 552 ISCSI_BD_FIRST_IN_BD_CHAIN; 553 out: 554 return rc; 555 } 556 557 558 /** 559 * bnx2i_free_mp_bdt - releases ITT back to free pool 560 * @hba: pointer to adapter instance 561 * 562 * free MP dummy buffer and associated BD table 563 */ 564 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba) 565 { 566 if (hba->mp_bd_tbl) { 567 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 568 hba->mp_bd_tbl, hba->mp_bd_dma); 569 hba->mp_bd_tbl = NULL; 570 } 571 if (hba->dummy_buffer) { 572 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 573 hba->dummy_buffer, hba->dummy_buf_dma); 574 hba->dummy_buffer = NULL; 575 } 576 return; 577 } 578 579 /** 580 * bnx2i_drop_session - notifies iscsid of connection error. 581 * @hba: adapter instance pointer 582 * @session: iscsi session pointer 583 * 584 * This notifies iscsid that there is a error, so it can initiate 585 * recovery. 586 * 587 * This relies on caller using the iscsi class iterator so the object 588 * is refcounted and does not disapper from under us. 589 */ 590 void bnx2i_drop_session(struct iscsi_cls_session *cls_session) 591 { 592 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED); 593 } 594 595 /** 596 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list 597 * @hba: pointer to adapter instance 598 * @ep: pointer to endpoint (transport indentifier) structure 599 * 600 * EP destroy queue manager 601 */ 602 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba, 603 struct bnx2i_endpoint *ep) 604 { 605 write_lock_bh(&hba->ep_rdwr_lock); 606 list_add_tail(&ep->link, &hba->ep_destroy_list); 607 write_unlock_bh(&hba->ep_rdwr_lock); 608 return 0; 609 } 610 611 /** 612 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list 613 * 614 * @hba: pointer to adapter instance 615 * @ep: pointer to endpoint (transport indentifier) structure 616 * 617 * EP destroy queue manager 618 */ 619 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba, 620 struct bnx2i_endpoint *ep) 621 { 622 write_lock_bh(&hba->ep_rdwr_lock); 623 list_del_init(&ep->link); 624 write_unlock_bh(&hba->ep_rdwr_lock); 625 626 return 0; 627 } 628 629 /** 630 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list 631 * @hba: pointer to adapter instance 632 * @ep: pointer to endpoint (transport indentifier) structure 633 * 634 * pending conn offload completion queue manager 635 */ 636 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba, 637 struct bnx2i_endpoint *ep) 638 { 639 write_lock_bh(&hba->ep_rdwr_lock); 640 list_add_tail(&ep->link, &hba->ep_ofld_list); 641 write_unlock_bh(&hba->ep_rdwr_lock); 642 return 0; 643 } 644 645 /** 646 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list 647 * @hba: pointer to adapter instance 648 * @ep: pointer to endpoint (transport indentifier) structure 649 * 650 * pending conn offload completion queue manager 651 */ 652 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba, 653 struct bnx2i_endpoint *ep) 654 { 655 write_lock_bh(&hba->ep_rdwr_lock); 656 list_del_init(&ep->link); 657 write_unlock_bh(&hba->ep_rdwr_lock); 658 return 0; 659 } 660 661 662 /** 663 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints 664 * 665 * @hba: pointer to adapter instance 666 * @iscsi_cid: iscsi context ID to find 667 * 668 */ 669 struct bnx2i_endpoint * 670 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid) 671 { 672 struct list_head *list; 673 struct list_head *tmp; 674 struct bnx2i_endpoint *ep; 675 676 read_lock_bh(&hba->ep_rdwr_lock); 677 list_for_each_safe(list, tmp, &hba->ep_ofld_list) { 678 ep = (struct bnx2i_endpoint *)list; 679 680 if (ep->ep_iscsi_cid == iscsi_cid) 681 break; 682 ep = NULL; 683 } 684 read_unlock_bh(&hba->ep_rdwr_lock); 685 686 if (!ep) 687 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid); 688 return ep; 689 } 690 691 /** 692 * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list 693 * @hba: pointer to adapter instance 694 * @iscsi_cid: iscsi context ID to find 695 * 696 */ 697 struct bnx2i_endpoint * 698 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid) 699 { 700 struct list_head *list; 701 struct list_head *tmp; 702 struct bnx2i_endpoint *ep; 703 704 read_lock_bh(&hba->ep_rdwr_lock); 705 list_for_each_safe(list, tmp, &hba->ep_destroy_list) { 706 ep = (struct bnx2i_endpoint *)list; 707 708 if (ep->ep_iscsi_cid == iscsi_cid) 709 break; 710 ep = NULL; 711 } 712 read_unlock_bh(&hba->ep_rdwr_lock); 713 714 if (!ep) 715 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid); 716 717 return ep; 718 } 719 720 /** 721 * bnx2i_ep_active_list_add - add an entry to ep active list 722 * @hba: pointer to adapter instance 723 * @ep: pointer to endpoint (transport indentifier) structure 724 * 725 * current active conn queue manager 726 */ 727 static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba, 728 struct bnx2i_endpoint *ep) 729 { 730 write_lock_bh(&hba->ep_rdwr_lock); 731 list_add_tail(&ep->link, &hba->ep_active_list); 732 write_unlock_bh(&hba->ep_rdwr_lock); 733 } 734 735 736 /** 737 * bnx2i_ep_active_list_del - deletes an entry to ep active list 738 * @hba: pointer to adapter instance 739 * @ep: pointer to endpoint (transport indentifier) structure 740 * 741 * current active conn queue manager 742 */ 743 static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba, 744 struct bnx2i_endpoint *ep) 745 { 746 write_lock_bh(&hba->ep_rdwr_lock); 747 list_del_init(&ep->link); 748 write_unlock_bh(&hba->ep_rdwr_lock); 749 } 750 751 752 /** 753 * bnx2i_setup_host_queue_size - assigns shost->can_queue param 754 * @hba: pointer to adapter instance 755 * @shost: scsi host pointer 756 * 757 * Initializes 'can_queue' parameter based on how many outstanding commands 758 * the device can handle. Each device 5708/5709/57710 has different 759 * capabilities 760 */ 761 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba, 762 struct Scsi_Host *shost) 763 { 764 if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type)) 765 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708; 766 else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) 767 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709; 768 else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) 769 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710; 770 else 771 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708; 772 } 773 774 775 /** 776 * bnx2i_alloc_hba - allocate and init adapter instance 777 * @cnic: cnic device pointer 778 * 779 * allocate & initialize adapter structure and call other 780 * support routines to do per adapter initialization 781 */ 782 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic) 783 { 784 struct Scsi_Host *shost; 785 struct bnx2i_hba *hba; 786 787 shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0); 788 if (!shost) 789 return NULL; 790 shost->dma_boundary = cnic->pcidev->dma_mask; 791 shost->transportt = bnx2i_scsi_xport_template; 792 shost->max_id = ISCSI_MAX_CONNS_PER_HBA; 793 shost->max_channel = 0; 794 shost->max_lun = 512; 795 shost->max_cmd_len = 16; 796 797 hba = iscsi_host_priv(shost); 798 hba->shost = shost; 799 hba->netdev = cnic->netdev; 800 /* Get PCI related information and update hba struct members */ 801 hba->pcidev = cnic->pcidev; 802 pci_dev_get(hba->pcidev); 803 hba->pci_did = hba->pcidev->device; 804 hba->pci_vid = hba->pcidev->vendor; 805 hba->pci_sdid = hba->pcidev->subsystem_device; 806 hba->pci_svid = hba->pcidev->subsystem_vendor; 807 hba->pci_func = PCI_FUNC(hba->pcidev->devfn); 808 hba->pci_devno = PCI_SLOT(hba->pcidev->devfn); 809 810 bnx2i_identify_device(hba); 811 bnx2i_setup_host_queue_size(hba, shost); 812 813 if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { 814 hba->regview = ioremap_nocache(hba->netdev->base_addr, 815 BNX2_MQ_CONFIG2); 816 if (!hba->regview) 817 goto ioreg_map_err; 818 } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { 819 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096); 820 if (!hba->regview) 821 goto ioreg_map_err; 822 } 823 824 if (bnx2i_setup_mp_bdt(hba)) 825 goto mp_bdt_mem_err; 826 827 INIT_LIST_HEAD(&hba->ep_ofld_list); 828 INIT_LIST_HEAD(&hba->ep_active_list); 829 INIT_LIST_HEAD(&hba->ep_destroy_list); 830 rwlock_init(&hba->ep_rdwr_lock); 831 832 hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED; 833 834 /* different values for 5708/5709/57710 */ 835 hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA; 836 837 if (bnx2i_setup_free_cid_que(hba)) 838 goto cid_que_err; 839 840 /* SQ/RQ/CQ size can be changed via sysfx interface */ 841 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { 842 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX) 843 hba->max_sqes = sq_size; 844 else 845 hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT; 846 } else { /* 5706/5708/5709 */ 847 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX) 848 hba->max_sqes = sq_size; 849 else 850 hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT; 851 } 852 853 hba->max_rqes = rq_size; 854 hba->max_cqes = hba->max_sqes + rq_size; 855 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { 856 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX) 857 hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX; 858 } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX) 859 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX; 860 861 hba->num_ccell = hba->max_sqes / 2; 862 863 spin_lock_init(&hba->lock); 864 mutex_init(&hba->net_dev_lock); 865 init_waitqueue_head(&hba->eh_wait); 866 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { 867 hba->hba_shutdown_tmo = 30 * HZ; 868 hba->conn_teardown_tmo = 20 * HZ; 869 hba->conn_ctx_destroy_tmo = 6 * HZ; 870 } else { /* 5706/5708/5709 */ 871 hba->hba_shutdown_tmo = 20 * HZ; 872 hba->conn_teardown_tmo = 10 * HZ; 873 hba->conn_ctx_destroy_tmo = 2 * HZ; 874 } 875 876 if (iscsi_host_add(shost, &hba->pcidev->dev)) 877 goto free_dump_mem; 878 return hba; 879 880 free_dump_mem: 881 bnx2i_release_free_cid_que(hba); 882 cid_que_err: 883 bnx2i_free_mp_bdt(hba); 884 mp_bdt_mem_err: 885 if (hba->regview) { 886 iounmap(hba->regview); 887 hba->regview = NULL; 888 } 889 ioreg_map_err: 890 pci_dev_put(hba->pcidev); 891 scsi_host_put(shost); 892 return NULL; 893 } 894 895 /** 896 * bnx2i_free_hba- releases hba structure and resources held by the adapter 897 * @hba: pointer to adapter instance 898 * 899 * free adapter structure and call various cleanup routines. 900 */ 901 void bnx2i_free_hba(struct bnx2i_hba *hba) 902 { 903 struct Scsi_Host *shost = hba->shost; 904 905 iscsi_host_remove(shost); 906 INIT_LIST_HEAD(&hba->ep_ofld_list); 907 INIT_LIST_HEAD(&hba->ep_active_list); 908 INIT_LIST_HEAD(&hba->ep_destroy_list); 909 pci_dev_put(hba->pcidev); 910 911 if (hba->regview) { 912 iounmap(hba->regview); 913 hba->regview = NULL; 914 } 915 bnx2i_free_mp_bdt(hba); 916 bnx2i_release_free_cid_que(hba); 917 iscsi_host_free(shost); 918 } 919 920 /** 921 * bnx2i_conn_free_login_resources - free DMA resources used for login process 922 * @hba: pointer to adapter instance 923 * @bnx2i_conn: iscsi connection pointer 924 * 925 * Login related resources, mostly BDT & payload DMA memory is freed 926 */ 927 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba, 928 struct bnx2i_conn *bnx2i_conn) 929 { 930 if (bnx2i_conn->gen_pdu.resp_bd_tbl) { 931 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 932 bnx2i_conn->gen_pdu.resp_bd_tbl, 933 bnx2i_conn->gen_pdu.resp_bd_dma); 934 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL; 935 } 936 937 if (bnx2i_conn->gen_pdu.req_bd_tbl) { 938 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 939 bnx2i_conn->gen_pdu.req_bd_tbl, 940 bnx2i_conn->gen_pdu.req_bd_dma); 941 bnx2i_conn->gen_pdu.req_bd_tbl = NULL; 942 } 943 944 if (bnx2i_conn->gen_pdu.resp_buf) { 945 dma_free_coherent(&hba->pcidev->dev, 946 ISCSI_DEF_MAX_RECV_SEG_LEN, 947 bnx2i_conn->gen_pdu.resp_buf, 948 bnx2i_conn->gen_pdu.resp_dma_addr); 949 bnx2i_conn->gen_pdu.resp_buf = NULL; 950 } 951 952 if (bnx2i_conn->gen_pdu.req_buf) { 953 dma_free_coherent(&hba->pcidev->dev, 954 ISCSI_DEF_MAX_RECV_SEG_LEN, 955 bnx2i_conn->gen_pdu.req_buf, 956 bnx2i_conn->gen_pdu.req_dma_addr); 957 bnx2i_conn->gen_pdu.req_buf = NULL; 958 } 959 } 960 961 /** 962 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop. 963 * @hba: pointer to adapter instance 964 * @bnx2i_conn: iscsi connection pointer 965 * 966 * Mgmt task DNA resources are allocated in this routine. 967 */ 968 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba, 969 struct bnx2i_conn *bnx2i_conn) 970 { 971 /* Allocate memory for login request/response buffers */ 972 bnx2i_conn->gen_pdu.req_buf = 973 dma_alloc_coherent(&hba->pcidev->dev, 974 ISCSI_DEF_MAX_RECV_SEG_LEN, 975 &bnx2i_conn->gen_pdu.req_dma_addr, 976 GFP_KERNEL); 977 if (bnx2i_conn->gen_pdu.req_buf == NULL) 978 goto login_req_buf_failure; 979 980 bnx2i_conn->gen_pdu.req_buf_size = 0; 981 bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf; 982 983 bnx2i_conn->gen_pdu.resp_buf = 984 dma_alloc_coherent(&hba->pcidev->dev, 985 ISCSI_DEF_MAX_RECV_SEG_LEN, 986 &bnx2i_conn->gen_pdu.resp_dma_addr, 987 GFP_KERNEL); 988 if (bnx2i_conn->gen_pdu.resp_buf == NULL) 989 goto login_resp_buf_failure; 990 991 bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; 992 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf; 993 994 bnx2i_conn->gen_pdu.req_bd_tbl = 995 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, 996 &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL); 997 if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL) 998 goto login_req_bd_tbl_failure; 999 1000 bnx2i_conn->gen_pdu.resp_bd_tbl = 1001 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, 1002 &bnx2i_conn->gen_pdu.resp_bd_dma, 1003 GFP_KERNEL); 1004 if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL) 1005 goto login_resp_bd_tbl_failure; 1006 1007 return 0; 1008 1009 login_resp_bd_tbl_failure: 1010 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, 1011 bnx2i_conn->gen_pdu.req_bd_tbl, 1012 bnx2i_conn->gen_pdu.req_bd_dma); 1013 bnx2i_conn->gen_pdu.req_bd_tbl = NULL; 1014 1015 login_req_bd_tbl_failure: 1016 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 1017 bnx2i_conn->gen_pdu.resp_buf, 1018 bnx2i_conn->gen_pdu.resp_dma_addr); 1019 bnx2i_conn->gen_pdu.resp_buf = NULL; 1020 login_resp_buf_failure: 1021 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 1022 bnx2i_conn->gen_pdu.req_buf, 1023 bnx2i_conn->gen_pdu.req_dma_addr); 1024 bnx2i_conn->gen_pdu.req_buf = NULL; 1025 login_req_buf_failure: 1026 iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data, 1027 "login resource alloc failed!!\n"); 1028 return -ENOMEM; 1029 1030 } 1031 1032 1033 /** 1034 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table. 1035 * @bnx2i_conn: iscsi connection pointer 1036 * 1037 * Allocates buffers and BD tables before shipping requests to cnic 1038 * for PDUs prepared by 'iscsid' daemon 1039 */ 1040 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn) 1041 { 1042 struct iscsi_bd *bd_tbl; 1043 1044 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl; 1045 1046 bd_tbl->buffer_addr_hi = 1047 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32); 1048 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr; 1049 bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr - 1050 bnx2i_conn->gen_pdu.req_buf; 1051 bd_tbl->reserved0 = 0; 1052 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN | 1053 ISCSI_BD_FIRST_IN_BD_CHAIN; 1054 1055 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl; 1056 bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32; 1057 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr; 1058 bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN; 1059 bd_tbl->reserved0 = 0; 1060 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN | 1061 ISCSI_BD_FIRST_IN_BD_CHAIN; 1062 } 1063 1064 1065 /** 1066 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks. 1067 * @task: transport layer task pointer 1068 * 1069 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login, 1070 * Nop-out and Logout requests flow through this path. 1071 */ 1072 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task) 1073 { 1074 struct bnx2i_cmd *cmd = task->dd_data; 1075 struct bnx2i_conn *bnx2i_conn = cmd->conn; 1076 int rc = 0; 1077 char *buf; 1078 int data_len; 1079 1080 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn); 1081 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { 1082 case ISCSI_OP_LOGIN: 1083 bnx2i_send_iscsi_login(bnx2i_conn, task); 1084 break; 1085 case ISCSI_OP_NOOP_OUT: 1086 data_len = bnx2i_conn->gen_pdu.req_buf_size; 1087 buf = bnx2i_conn->gen_pdu.req_buf; 1088 if (data_len) 1089 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task, 1090 buf, data_len, 1); 1091 else 1092 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task, 1093 NULL, 0, 1); 1094 break; 1095 case ISCSI_OP_LOGOUT: 1096 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task); 1097 break; 1098 case ISCSI_OP_SCSI_TMFUNC: 1099 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task); 1100 break; 1101 case ISCSI_OP_TEXT: 1102 rc = bnx2i_send_iscsi_text(bnx2i_conn, task); 1103 break; 1104 default: 1105 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, 1106 "send_gen: unsupported op 0x%x\n", 1107 task->hdr->opcode); 1108 } 1109 return rc; 1110 } 1111 1112 1113 /********************************************************************** 1114 * SCSI-ML Interface 1115 **********************************************************************/ 1116 1117 /** 1118 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe 1119 * @sc: SCSI-ML command pointer 1120 * @cmd: iscsi cmd pointer 1121 */ 1122 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd) 1123 { 1124 u32 dword; 1125 int lpcnt; 1126 u8 *srcp; 1127 u32 *dstp; 1128 u32 scsi_lun[2]; 1129 1130 int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun); 1131 cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]); 1132 cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]); 1133 1134 lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword); 1135 srcp = (u8 *) sc->cmnd; 1136 dstp = (u32 *) cmd->req.cdb; 1137 while (lpcnt--) { 1138 memcpy(&dword, (const void *) srcp, 4); 1139 *dstp = cpu_to_be32(dword); 1140 srcp += 4; 1141 dstp++; 1142 } 1143 if (sc->cmd_len & 0x3) { 1144 dword = (u32) srcp[0] | ((u32) srcp[1] << 8); 1145 *dstp = cpu_to_be32(dword); 1146 } 1147 } 1148 1149 static void bnx2i_cleanup_task(struct iscsi_task *task) 1150 { 1151 struct iscsi_conn *conn = task->conn; 1152 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1153 struct bnx2i_hba *hba = bnx2i_conn->hba; 1154 1155 /* 1156 * mgmt task or cmd was never sent to us to transmit. 1157 */ 1158 if (!task->sc || task->state == ISCSI_TASK_PENDING) 1159 return; 1160 /* 1161 * need to clean-up task context to claim dma buffers 1162 */ 1163 if (task->state == ISCSI_TASK_ABRT_TMF) { 1164 bnx2i_send_cmd_cleanup_req(hba, task->dd_data); 1165 1166 spin_unlock_bh(&conn->session->lock); 1167 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl, 1168 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT)); 1169 spin_lock_bh(&conn->session->lock); 1170 } 1171 bnx2i_iscsi_unmap_sg_list(task->dd_data); 1172 } 1173 1174 /** 1175 * bnx2i_mtask_xmit - transmit mtask to chip for further processing 1176 * @conn: transport layer conn structure pointer 1177 * @task: transport layer command structure pointer 1178 */ 1179 static int 1180 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 1181 { 1182 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1183 struct bnx2i_cmd *cmd = task->dd_data; 1184 1185 memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); 1186 1187 bnx2i_setup_cmd_wqe_template(cmd); 1188 bnx2i_conn->gen_pdu.req_buf_size = task->data_count; 1189 if (task->data_count) { 1190 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data, 1191 task->data_count); 1192 bnx2i_conn->gen_pdu.req_wr_ptr = 1193 bnx2i_conn->gen_pdu.req_buf + task->data_count; 1194 } 1195 cmd->conn = conn->dd_data; 1196 cmd->scsi_cmd = NULL; 1197 return bnx2i_iscsi_send_generic_request(task); 1198 } 1199 1200 /** 1201 * bnx2i_task_xmit - transmit iscsi command to chip for further processing 1202 * @task: transport layer command structure pointer 1203 * 1204 * maps SG buffers and send request to chip/firmware in the form of SQ WQE 1205 */ 1206 static int bnx2i_task_xmit(struct iscsi_task *task) 1207 { 1208 struct iscsi_conn *conn = task->conn; 1209 struct iscsi_session *session = conn->session; 1210 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session); 1211 struct bnx2i_hba *hba = iscsi_host_priv(shost); 1212 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1213 struct scsi_cmnd *sc = task->sc; 1214 struct bnx2i_cmd *cmd = task->dd_data; 1215 struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr; 1216 1217 if (bnx2i_conn->ep->num_active_cmds + 1 > hba->max_sqes) 1218 return -ENOMEM; 1219 1220 /* 1221 * If there is no scsi_cmnd this must be a mgmt task 1222 */ 1223 if (!sc) 1224 return bnx2i_mtask_xmit(conn, task); 1225 1226 bnx2i_setup_cmd_wqe_template(cmd); 1227 cmd->req.op_code = ISCSI_OP_SCSI_CMD; 1228 cmd->conn = bnx2i_conn; 1229 cmd->scsi_cmd = sc; 1230 cmd->req.total_data_transfer_length = scsi_bufflen(sc); 1231 cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn); 1232 1233 bnx2i_iscsi_map_sg_list(cmd); 1234 bnx2i_cpy_scsi_cdb(sc, cmd); 1235 1236 cmd->req.op_attr = ISCSI_ATTR_SIMPLE; 1237 if (sc->sc_data_direction == DMA_TO_DEVICE) { 1238 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE; 1239 cmd->req.itt = task->itt | 1240 (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT); 1241 bnx2i_setup_write_cmd_bd_info(task); 1242 } else { 1243 if (scsi_bufflen(sc)) 1244 cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ; 1245 cmd->req.itt = task->itt | 1246 (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT); 1247 } 1248 1249 cmd->req.num_bds = cmd->io_tbl.bd_valid; 1250 if (!cmd->io_tbl.bd_valid) { 1251 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma; 1252 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32); 1253 cmd->req.num_bds = 1; 1254 } 1255 1256 bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd); 1257 return 0; 1258 } 1259 1260 /** 1261 * bnx2i_session_create - create a new iscsi session 1262 * @cmds_max: max commands supported 1263 * @qdepth: scsi queue depth to support 1264 * @initial_cmdsn: initial iscsi CMDSN to be used for this session 1265 * 1266 * Creates a new iSCSI session instance on given device. 1267 */ 1268 static struct iscsi_cls_session * 1269 bnx2i_session_create(struct iscsi_endpoint *ep, 1270 uint16_t cmds_max, uint16_t qdepth, 1271 uint32_t initial_cmdsn) 1272 { 1273 struct Scsi_Host *shost; 1274 struct iscsi_cls_session *cls_session; 1275 struct bnx2i_hba *hba; 1276 struct bnx2i_endpoint *bnx2i_ep; 1277 1278 if (!ep) { 1279 printk(KERN_ERR "bnx2i: missing ep.\n"); 1280 return NULL; 1281 } 1282 1283 bnx2i_ep = ep->dd_data; 1284 shost = bnx2i_ep->hba->shost; 1285 hba = iscsi_host_priv(shost); 1286 if (bnx2i_adapter_ready(hba)) 1287 return NULL; 1288 1289 /* 1290 * user can override hw limit as long as it is within 1291 * the min/max. 1292 */ 1293 if (cmds_max > hba->max_sqes) 1294 cmds_max = hba->max_sqes; 1295 else if (cmds_max < BNX2I_SQ_WQES_MIN) 1296 cmds_max = BNX2I_SQ_WQES_MIN; 1297 1298 cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost, 1299 cmds_max, 0, sizeof(struct bnx2i_cmd), 1300 initial_cmdsn, ISCSI_MAX_TARGET); 1301 if (!cls_session) 1302 return NULL; 1303 1304 if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data)) 1305 goto session_teardown; 1306 return cls_session; 1307 1308 session_teardown: 1309 iscsi_session_teardown(cls_session); 1310 return NULL; 1311 } 1312 1313 1314 /** 1315 * bnx2i_session_destroy - destroys iscsi session 1316 * @cls_session: pointer to iscsi cls session 1317 * 1318 * Destroys previously created iSCSI session instance and releases 1319 * all resources held by it 1320 */ 1321 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session) 1322 { 1323 struct iscsi_session *session = cls_session->dd_data; 1324 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 1325 struct bnx2i_hba *hba = iscsi_host_priv(shost); 1326 1327 bnx2i_destroy_cmd_pool(hba, session); 1328 iscsi_session_teardown(cls_session); 1329 } 1330 1331 1332 /** 1333 * bnx2i_conn_create - create iscsi connection instance 1334 * @cls_session: pointer to iscsi cls session 1335 * @cid: iscsi cid as per rfc (not NX2's CID terminology) 1336 * 1337 * Creates a new iSCSI connection instance for a given session 1338 */ 1339 static struct iscsi_cls_conn * 1340 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) 1341 { 1342 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 1343 struct bnx2i_hba *hba = iscsi_host_priv(shost); 1344 struct bnx2i_conn *bnx2i_conn; 1345 struct iscsi_cls_conn *cls_conn; 1346 struct iscsi_conn *conn; 1347 1348 cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn), 1349 cid); 1350 if (!cls_conn) 1351 return NULL; 1352 conn = cls_conn->dd_data; 1353 1354 bnx2i_conn = conn->dd_data; 1355 bnx2i_conn->cls_conn = cls_conn; 1356 bnx2i_conn->hba = hba; 1357 /* 'ep' ptr will be assigned in bind() call */ 1358 bnx2i_conn->ep = NULL; 1359 init_completion(&bnx2i_conn->cmd_cleanup_cmpl); 1360 1361 if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) { 1362 iscsi_conn_printk(KERN_ALERT, conn, 1363 "conn_new: login resc alloc failed!!\n"); 1364 goto free_conn; 1365 } 1366 1367 return cls_conn; 1368 1369 free_conn: 1370 iscsi_conn_teardown(cls_conn); 1371 return NULL; 1372 } 1373 1374 /** 1375 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together 1376 * @cls_session: pointer to iscsi cls session 1377 * @cls_conn: pointer to iscsi cls conn 1378 * @transport_fd: 64-bit EP handle 1379 * @is_leading: leading connection on this session? 1380 * 1381 * Binds together iSCSI session instance, iSCSI connection instance 1382 * and the TCP connection. This routine returns error code if 1383 * TCP connection does not belong on the device iSCSI sess/conn 1384 * is bound 1385 */ 1386 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session, 1387 struct iscsi_cls_conn *cls_conn, 1388 uint64_t transport_fd, int is_leading) 1389 { 1390 struct iscsi_conn *conn = cls_conn->dd_data; 1391 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1392 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 1393 struct bnx2i_hba *hba = iscsi_host_priv(shost); 1394 struct bnx2i_endpoint *bnx2i_ep; 1395 struct iscsi_endpoint *ep; 1396 int ret_code; 1397 1398 ep = iscsi_lookup_endpoint(transport_fd); 1399 if (!ep) 1400 return -EINVAL; 1401 /* 1402 * Forcefully terminate all in progress connection recovery at the 1403 * earliest, either in bind(), send_pdu(LOGIN), or conn_start() 1404 */ 1405 if (bnx2i_adapter_ready(hba)) 1406 return -EIO; 1407 1408 bnx2i_ep = ep->dd_data; 1409 if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) || 1410 (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD)) 1411 /* Peer disconnect via' FIN or RST */ 1412 return -EINVAL; 1413 1414 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) 1415 return -EINVAL; 1416 1417 if (bnx2i_ep->hba != hba) { 1418 /* Error - TCP connection does not belong to this device 1419 */ 1420 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data, 1421 "conn bind, ep=0x%p (%s) does not", 1422 bnx2i_ep, bnx2i_ep->hba->netdev->name); 1423 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data, 1424 "belong to hba (%s)\n", 1425 hba->netdev->name); 1426 return -EEXIST; 1427 } 1428 bnx2i_ep->conn = bnx2i_conn; 1429 bnx2i_conn->ep = bnx2i_ep; 1430 bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid; 1431 bnx2i_conn->fw_cid = bnx2i_ep->ep_cid; 1432 1433 ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn, 1434 bnx2i_ep->ep_iscsi_cid); 1435 1436 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710 1437 * driver needs to explicitly replenish RQ index during setup. 1438 */ 1439 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) 1440 bnx2i_put_rq_buf(bnx2i_conn, 0); 1441 1442 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE); 1443 return ret_code; 1444 } 1445 1446 1447 /** 1448 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources 1449 * @cls_conn: pointer to iscsi cls conn 1450 * 1451 * Destroy an iSCSI connection instance and release memory resources held by 1452 * this connection 1453 */ 1454 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn) 1455 { 1456 struct iscsi_conn *conn = cls_conn->dd_data; 1457 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1458 struct Scsi_Host *shost; 1459 struct bnx2i_hba *hba; 1460 1461 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 1462 hba = iscsi_host_priv(shost); 1463 1464 bnx2i_conn_free_login_resources(hba, bnx2i_conn); 1465 iscsi_conn_teardown(cls_conn); 1466 } 1467 1468 1469 /** 1470 * bnx2i_ep_get_param - return iscsi ep parameter to caller 1471 * @ep: pointer to iscsi endpoint 1472 * @param: parameter type identifier 1473 * @buf: buffer pointer 1474 * 1475 * returns iSCSI ep parameters 1476 */ 1477 static int bnx2i_ep_get_param(struct iscsi_endpoint *ep, 1478 enum iscsi_param param, char *buf) 1479 { 1480 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data; 1481 struct bnx2i_hba *hba = bnx2i_ep->hba; 1482 int len = -ENOTCONN; 1483 1484 if (!hba) 1485 return -ENOTCONN; 1486 1487 switch (param) { 1488 case ISCSI_PARAM_CONN_PORT: 1489 mutex_lock(&hba->net_dev_lock); 1490 if (bnx2i_ep->cm_sk) 1491 len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port); 1492 mutex_unlock(&hba->net_dev_lock); 1493 break; 1494 case ISCSI_PARAM_CONN_ADDRESS: 1495 mutex_lock(&hba->net_dev_lock); 1496 if (bnx2i_ep->cm_sk) 1497 len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip); 1498 mutex_unlock(&hba->net_dev_lock); 1499 break; 1500 default: 1501 return -ENOSYS; 1502 } 1503 1504 return len; 1505 } 1506 1507 /** 1508 * bnx2i_host_get_param - returns host (adapter) related parameters 1509 * @shost: scsi host pointer 1510 * @param: parameter type identifier 1511 * @buf: buffer pointer 1512 */ 1513 static int bnx2i_host_get_param(struct Scsi_Host *shost, 1514 enum iscsi_host_param param, char *buf) 1515 { 1516 struct bnx2i_hba *hba = iscsi_host_priv(shost); 1517 int len = 0; 1518 1519 switch (param) { 1520 case ISCSI_HOST_PARAM_HWADDRESS: 1521 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6); 1522 break; 1523 case ISCSI_HOST_PARAM_NETDEV_NAME: 1524 len = sprintf(buf, "%s\n", hba->netdev->name); 1525 break; 1526 case ISCSI_HOST_PARAM_IPADDRESS: { 1527 struct list_head *active_list = &hba->ep_active_list; 1528 1529 read_lock_bh(&hba->ep_rdwr_lock); 1530 if (!list_empty(&hba->ep_active_list)) { 1531 struct bnx2i_endpoint *bnx2i_ep; 1532 struct cnic_sock *csk; 1533 1534 bnx2i_ep = list_first_entry(active_list, 1535 struct bnx2i_endpoint, 1536 link); 1537 csk = bnx2i_ep->cm_sk; 1538 if (test_bit(SK_F_IPV6, &csk->flags)) 1539 len = sprintf(buf, "%pI6\n", csk->src_ip); 1540 else 1541 len = sprintf(buf, "%pI4\n", csk->src_ip); 1542 } 1543 read_unlock_bh(&hba->ep_rdwr_lock); 1544 break; 1545 } 1546 default: 1547 return iscsi_host_get_param(shost, param, buf); 1548 } 1549 return len; 1550 } 1551 1552 /** 1553 * bnx2i_conn_start - completes iscsi connection migration to FFP 1554 * @cls_conn: pointer to iscsi cls conn 1555 * 1556 * last call in FFP migration to handover iscsi conn to the driver 1557 */ 1558 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn) 1559 { 1560 struct iscsi_conn *conn = cls_conn->dd_data; 1561 struct bnx2i_conn *bnx2i_conn = conn->dd_data; 1562 1563 bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START; 1564 bnx2i_update_iscsi_conn(conn); 1565 1566 /* 1567 * this should normally not sleep for a long time so it should 1568 * not disrupt the caller. 1569 */ 1570 bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies; 1571 bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer; 1572 bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep; 1573 add_timer(&bnx2i_conn->ep->ofld_timer); 1574 /* update iSCSI context for this conn, wait for CNIC to complete */ 1575 wait_event_interruptible(bnx2i_conn->ep->ofld_wait, 1576 bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START); 1577 1578 if (signal_pending(current)) 1579 flush_signals(current); 1580 del_timer_sync(&bnx2i_conn->ep->ofld_timer); 1581 1582 iscsi_conn_start(cls_conn); 1583 return 0; 1584 } 1585 1586 1587 /** 1588 * bnx2i_conn_get_stats - returns iSCSI stats 1589 * @cls_conn: pointer to iscsi cls conn 1590 * @stats: pointer to iscsi statistic struct 1591 */ 1592 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn, 1593 struct iscsi_stats *stats) 1594 { 1595 struct iscsi_conn *conn = cls_conn->dd_data; 1596 1597 stats->txdata_octets = conn->txdata_octets; 1598 stats->rxdata_octets = conn->rxdata_octets; 1599 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 1600 stats->dataout_pdus = conn->dataout_pdus_cnt; 1601 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 1602 stats->datain_pdus = conn->datain_pdus_cnt; 1603 stats->r2t_pdus = conn->r2t_pdus_cnt; 1604 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 1605 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 1606 stats->custom_length = 3; 1607 strcpy(stats->custom[2].desc, "eh_abort_cnt"); 1608 stats->custom[2].value = conn->eh_abort_cnt; 1609 stats->digest_err = 0; 1610 stats->timeout_err = 0; 1611 stats->custom_length = 0; 1612 } 1613 1614 1615 /** 1616 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices 1617 * @dst_addr: target IP address 1618 * 1619 * check if route resolves to BNX2 device 1620 */ 1621 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr) 1622 { 1623 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr; 1624 struct bnx2i_hba *hba; 1625 struct cnic_dev *cnic = NULL; 1626 1627 hba = get_adapter_list_head(); 1628 if (hba && hba->cnic) 1629 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI); 1630 if (!cnic) { 1631 printk(KERN_ALERT "bnx2i: no route," 1632 "can't connect using cnic\n"); 1633 goto no_nx2_route; 1634 } 1635 hba = bnx2i_find_hba_for_cnic(cnic); 1636 if (!hba) 1637 goto no_nx2_route; 1638 1639 if (bnx2i_adapter_ready(hba)) { 1640 printk(KERN_ALERT "bnx2i: check route, hba not found\n"); 1641 goto no_nx2_route; 1642 } 1643 if (hba->netdev->mtu > hba->mtu_supported) { 1644 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n", 1645 hba->netdev->name, hba->netdev->mtu); 1646 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n", 1647 hba->mtu_supported); 1648 goto no_nx2_route; 1649 } 1650 return hba; 1651 no_nx2_route: 1652 return NULL; 1653 } 1654 1655 1656 /** 1657 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources 1658 * @hba: pointer to adapter instance 1659 * @ep: endpoint (transport indentifier) structure 1660 * 1661 * destroys cm_sock structure and on chip iscsi context 1662 */ 1663 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba, 1664 struct bnx2i_endpoint *ep) 1665 { 1666 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk) 1667 hba->cnic->cm_destroy(ep->cm_sk); 1668 1669 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) && 1670 ep->state == EP_STATE_DISCONN_TIMEDOUT) { 1671 if (ep->conn && ep->conn->cls_conn && 1672 ep->conn->cls_conn->dd_data) { 1673 struct iscsi_conn *conn = ep->conn->cls_conn->dd_data; 1674 1675 /* Must suspend all rx queue activity for this ep */ 1676 set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); 1677 } 1678 /* CONN_DISCONNECT timeout may or may not be an issue depending 1679 * on what transcribed in TCP layer, different targets behave 1680 * differently 1681 */ 1682 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, " 1683 "please submit GRC Dump, NW/PCIe trace, " 1684 "driver msgs to developers for analysis\n", 1685 hba->netdev->name); 1686 } 1687 1688 ep->state = EP_STATE_CLEANUP_START; 1689 init_timer(&ep->ofld_timer); 1690 ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies; 1691 ep->ofld_timer.function = bnx2i_ep_ofld_timer; 1692 ep->ofld_timer.data = (unsigned long) ep; 1693 add_timer(&ep->ofld_timer); 1694 1695 bnx2i_ep_destroy_list_add(hba, ep); 1696 1697 /* destroy iSCSI context, wait for it to complete */ 1698 if (bnx2i_send_conn_destroy(hba, ep)) 1699 ep->state = EP_STATE_CLEANUP_CMPL; 1700 1701 wait_event_interruptible(ep->ofld_wait, 1702 (ep->state != EP_STATE_CLEANUP_START)); 1703 1704 if (signal_pending(current)) 1705 flush_signals(current); 1706 del_timer_sync(&ep->ofld_timer); 1707 1708 bnx2i_ep_destroy_list_del(hba, ep); 1709 1710 if (ep->state != EP_STATE_CLEANUP_CMPL) 1711 /* should never happen */ 1712 printk(KERN_ALERT "bnx2i - conn destroy failed\n"); 1713 1714 return 0; 1715 } 1716 1717 1718 /** 1719 * bnx2i_ep_connect - establish TCP connection to target portal 1720 * @shost: scsi host 1721 * @dst_addr: target IP address 1722 * @non_blocking: blocking or non-blocking call 1723 * 1724 * this routine initiates the TCP/IP connection by invoking Option-2 i/f 1725 * with l5_core and the CNIC. This is a multi-step process of resolving 1726 * route to target, create a iscsi connection context, handshaking with 1727 * CNIC module to create/initialize the socket struct and finally 1728 * sending down option-2 request to complete TCP 3-way handshake 1729 */ 1730 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost, 1731 struct sockaddr *dst_addr, 1732 int non_blocking) 1733 { 1734 u32 iscsi_cid = BNX2I_CID_RESERVED; 1735 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr; 1736 struct sockaddr_in6 *desti6; 1737 struct bnx2i_endpoint *bnx2i_ep; 1738 struct bnx2i_hba *hba; 1739 struct cnic_dev *cnic; 1740 struct cnic_sockaddr saddr; 1741 struct iscsi_endpoint *ep; 1742 int rc = 0; 1743 1744 if (shost) { 1745 /* driver is given scsi host to work with */ 1746 hba = iscsi_host_priv(shost); 1747 } else 1748 /* 1749 * check if the given destination can be reached through 1750 * a iscsi capable NetXtreme2 device 1751 */ 1752 hba = bnx2i_check_route(dst_addr); 1753 1754 if (!hba) { 1755 rc = -EINVAL; 1756 goto nohba; 1757 } 1758 mutex_lock(&hba->net_dev_lock); 1759 1760 if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) { 1761 rc = -EPERM; 1762 goto check_busy; 1763 } 1764 cnic = hba->cnic; 1765 ep = bnx2i_alloc_ep(hba); 1766 if (!ep) { 1767 rc = -ENOMEM; 1768 goto check_busy; 1769 } 1770 bnx2i_ep = ep->dd_data; 1771 1772 bnx2i_ep->num_active_cmds = 0; 1773 iscsi_cid = bnx2i_alloc_iscsi_cid(hba); 1774 if (iscsi_cid == -1) { 1775 printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate " 1776 "iscsi cid\n", hba->netdev->name); 1777 rc = -ENOMEM; 1778 bnx2i_free_ep(ep); 1779 goto check_busy; 1780 } 1781 bnx2i_ep->hba_age = hba->age; 1782 1783 rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep); 1784 if (rc != 0) { 1785 printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error" 1786 "\n", hba->netdev->name); 1787 rc = -ENOMEM; 1788 goto qp_resc_err; 1789 } 1790 1791 bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid; 1792 bnx2i_ep->state = EP_STATE_OFLD_START; 1793 bnx2i_ep_ofld_list_add(hba, bnx2i_ep); 1794 1795 init_timer(&bnx2i_ep->ofld_timer); 1796 bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies; 1797 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer; 1798 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep; 1799 add_timer(&bnx2i_ep->ofld_timer); 1800 1801 if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) { 1802 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) { 1803 printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n", 1804 hba->netdev->name, bnx2i_ep->ep_iscsi_cid); 1805 rc = -EBUSY; 1806 } else 1807 rc = -ENOSPC; 1808 printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe" 1809 "\n", hba->netdev->name); 1810 bnx2i_ep_ofld_list_del(hba, bnx2i_ep); 1811 goto conn_failed; 1812 } 1813 1814 /* Wait for CNIC hardware to setup conn context and return 'cid' */ 1815 wait_event_interruptible(bnx2i_ep->ofld_wait, 1816 bnx2i_ep->state != EP_STATE_OFLD_START); 1817 1818 if (signal_pending(current)) 1819 flush_signals(current); 1820 del_timer_sync(&bnx2i_ep->ofld_timer); 1821 1822 bnx2i_ep_ofld_list_del(hba, bnx2i_ep); 1823 1824 if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) { 1825 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) { 1826 printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n", 1827 hba->netdev->name, bnx2i_ep->ep_iscsi_cid); 1828 rc = -EBUSY; 1829 } else 1830 rc = -ENOSPC; 1831 goto conn_failed; 1832 } 1833 1834 rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid, 1835 iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep); 1836 if (rc) { 1837 rc = -EINVAL; 1838 /* Need to terminate and cleanup the connection */ 1839 goto release_ep; 1840 } 1841 1842 bnx2i_ep->cm_sk->rcv_buf = 256 * 1024; 1843 bnx2i_ep->cm_sk->snd_buf = 256 * 1024; 1844 clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags); 1845 1846 memset(&saddr, 0, sizeof(saddr)); 1847 if (dst_addr->sa_family == AF_INET) { 1848 desti = (struct sockaddr_in *) dst_addr; 1849 saddr.remote.v4 = *desti; 1850 saddr.local.v4.sin_family = desti->sin_family; 1851 } else if (dst_addr->sa_family == AF_INET6) { 1852 desti6 = (struct sockaddr_in6 *) dst_addr; 1853 saddr.remote.v6 = *desti6; 1854 saddr.local.v6.sin6_family = desti6->sin6_family; 1855 } 1856 1857 bnx2i_ep->timestamp = jiffies; 1858 bnx2i_ep->state = EP_STATE_CONNECT_START; 1859 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) { 1860 rc = -EINVAL; 1861 goto conn_failed; 1862 } else 1863 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr); 1864 if (rc) 1865 goto release_ep; 1866 1867 bnx2i_ep_active_list_add(hba, bnx2i_ep); 1868 1869 if (bnx2i_map_ep_dbell_regs(bnx2i_ep)) 1870 goto del_active_ep; 1871 1872 mutex_unlock(&hba->net_dev_lock); 1873 return ep; 1874 1875 del_active_ep: 1876 bnx2i_ep_active_list_del(hba, bnx2i_ep); 1877 release_ep: 1878 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) { 1879 mutex_unlock(&hba->net_dev_lock); 1880 return ERR_PTR(rc); 1881 } 1882 conn_failed: 1883 bnx2i_free_qp_resc(hba, bnx2i_ep); 1884 qp_resc_err: 1885 bnx2i_free_ep(ep); 1886 check_busy: 1887 mutex_unlock(&hba->net_dev_lock); 1888 nohba: 1889 return ERR_PTR(rc); 1890 } 1891 1892 1893 /** 1894 * bnx2i_ep_poll - polls for TCP connection establishement 1895 * @ep: TCP connection (endpoint) handle 1896 * @timeout_ms: timeout value in milli secs 1897 * 1898 * polls for TCP connect request to complete 1899 */ 1900 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 1901 { 1902 struct bnx2i_endpoint *bnx2i_ep; 1903 int rc = 0; 1904 1905 bnx2i_ep = ep->dd_data; 1906 if ((bnx2i_ep->state == EP_STATE_IDLE) || 1907 (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) || 1908 (bnx2i_ep->state == EP_STATE_OFLD_FAILED)) 1909 return -1; 1910 if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL) 1911 return 1; 1912 1913 rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait, 1914 ((bnx2i_ep->state == 1915 EP_STATE_OFLD_FAILED) || 1916 (bnx2i_ep->state == 1917 EP_STATE_CONNECT_FAILED) || 1918 (bnx2i_ep->state == 1919 EP_STATE_CONNECT_COMPL)), 1920 msecs_to_jiffies(timeout_ms)); 1921 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED) 1922 rc = -1; 1923 1924 if (rc > 0) 1925 return 1; 1926 else if (!rc) 1927 return 0; /* timeout */ 1928 else 1929 return rc; 1930 } 1931 1932 1933 /** 1934 * bnx2i_ep_tcp_conn_active - check EP state transition 1935 * @ep: endpoint pointer 1936 * 1937 * check if underlying TCP connection is active 1938 */ 1939 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep) 1940 { 1941 int ret; 1942 int cnic_dev_10g = 0; 1943 1944 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) 1945 cnic_dev_10g = 1; 1946 1947 switch (bnx2i_ep->state) { 1948 case EP_STATE_CLEANUP_FAILED: 1949 case EP_STATE_OFLD_FAILED: 1950 case EP_STATE_DISCONN_TIMEDOUT: 1951 ret = 0; 1952 break; 1953 case EP_STATE_CONNECT_START: 1954 case EP_STATE_CONNECT_FAILED: 1955 case EP_STATE_CONNECT_COMPL: 1956 case EP_STATE_ULP_UPDATE_START: 1957 case EP_STATE_ULP_UPDATE_COMPL: 1958 case EP_STATE_TCP_FIN_RCVD: 1959 case EP_STATE_LOGOUT_SENT: 1960 case EP_STATE_LOGOUT_RESP_RCVD: 1961 case EP_STATE_ULP_UPDATE_FAILED: 1962 ret = 1; 1963 break; 1964 case EP_STATE_TCP_RST_RCVD: 1965 if (cnic_dev_10g) 1966 ret = 0; 1967 else 1968 ret = 1; 1969 break; 1970 default: 1971 ret = 0; 1972 } 1973 1974 return ret; 1975 } 1976 1977 1978 /* 1979 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw 1980 * @ep: TCP connection (bnx2i endpoint) handle 1981 * 1982 * executes TCP connection teardown process 1983 */ 1984 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep) 1985 { 1986 struct bnx2i_hba *hba = bnx2i_ep->hba; 1987 struct cnic_dev *cnic; 1988 struct iscsi_session *session = NULL; 1989 struct iscsi_conn *conn = NULL; 1990 int ret = 0; 1991 int close = 0; 1992 int close_ret = 0; 1993 1994 if (!hba) 1995 return 0; 1996 1997 cnic = hba->cnic; 1998 if (!cnic) 1999 return 0; 2000 2001 if (bnx2i_ep->state == EP_STATE_IDLE || 2002 bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT) 2003 return 0; 2004 2005 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep)) 2006 goto destroy_conn; 2007 2008 if (bnx2i_ep->conn) { 2009 conn = bnx2i_ep->conn->cls_conn->dd_data; 2010 session = conn->session; 2011 } 2012 2013 init_timer(&bnx2i_ep->ofld_timer); 2014 bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies; 2015 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer; 2016 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep; 2017 add_timer(&bnx2i_ep->ofld_timer); 2018 2019 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) 2020 goto out; 2021 2022 if (session) { 2023 spin_lock_bh(&session->lock); 2024 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) { 2025 if (session->state == ISCSI_STATE_LOGGING_OUT) { 2026 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) { 2027 /* Logout sent, but no resp */ 2028 printk(KERN_ALERT "bnx2i (%s): WARNING" 2029 " logout response was not " 2030 "received!\n", 2031 bnx2i_ep->hba->netdev->name); 2032 } else if (bnx2i_ep->state == 2033 EP_STATE_LOGOUT_RESP_RCVD) 2034 close = 1; 2035 } 2036 } else 2037 close = 1; 2038 2039 spin_unlock_bh(&session->lock); 2040 } 2041 2042 bnx2i_ep->state = EP_STATE_DISCONN_START; 2043 2044 if (close) 2045 close_ret = cnic->cm_close(bnx2i_ep->cm_sk); 2046 else 2047 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk); 2048 2049 if (close_ret) 2050 printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n", 2051 bnx2i_ep->hba->netdev->name, close, close_ret); 2052 else 2053 /* wait for option-2 conn teardown */ 2054 wait_event_interruptible(bnx2i_ep->ofld_wait, 2055 bnx2i_ep->state != EP_STATE_DISCONN_START); 2056 2057 if (signal_pending(current)) 2058 flush_signals(current); 2059 del_timer_sync(&bnx2i_ep->ofld_timer); 2060 2061 destroy_conn: 2062 bnx2i_ep_active_list_del(hba, bnx2i_ep); 2063 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) 2064 return -EINVAL; 2065 out: 2066 bnx2i_ep->state = EP_STATE_IDLE; 2067 return ret; 2068 } 2069 2070 2071 /** 2072 * bnx2i_ep_disconnect - executes TCP connection teardown process 2073 * @ep: TCP connection (iscsi endpoint) handle 2074 * 2075 * executes TCP connection teardown process 2076 */ 2077 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep) 2078 { 2079 struct bnx2i_endpoint *bnx2i_ep; 2080 struct bnx2i_conn *bnx2i_conn = NULL; 2081 struct iscsi_conn *conn = NULL; 2082 struct bnx2i_hba *hba; 2083 2084 bnx2i_ep = ep->dd_data; 2085 2086 /* driver should not attempt connection cleanup until TCP_CONNECT 2087 * completes either successfully or fails. Timeout is 9-secs, so 2088 * wait for it to complete 2089 */ 2090 while ((bnx2i_ep->state == EP_STATE_CONNECT_START) && 2091 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ))) 2092 msleep(250); 2093 2094 if (bnx2i_ep->conn) { 2095 bnx2i_conn = bnx2i_ep->conn; 2096 conn = bnx2i_conn->cls_conn->dd_data; 2097 iscsi_suspend_queue(conn); 2098 } 2099 hba = bnx2i_ep->hba; 2100 2101 mutex_lock(&hba->net_dev_lock); 2102 2103 if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT) 2104 goto out; 2105 2106 if (bnx2i_ep->state == EP_STATE_IDLE) 2107 goto free_resc; 2108 2109 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) || 2110 (bnx2i_ep->hba_age != hba->age)) { 2111 bnx2i_ep_active_list_del(hba, bnx2i_ep); 2112 goto free_resc; 2113 } 2114 2115 /* Do all chip cleanup here */ 2116 if (bnx2i_hw_ep_disconnect(bnx2i_ep)) { 2117 mutex_unlock(&hba->net_dev_lock); 2118 return; 2119 } 2120 free_resc: 2121 bnx2i_free_qp_resc(hba, bnx2i_ep); 2122 2123 if (bnx2i_conn) 2124 bnx2i_conn->ep = NULL; 2125 2126 bnx2i_free_ep(ep); 2127 out: 2128 mutex_unlock(&hba->net_dev_lock); 2129 2130 wake_up_interruptible(&hba->eh_wait); 2131 } 2132 2133 2134 /** 2135 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler 2136 * @buf: pointer to buffer containing iscsi path message 2137 * 2138 */ 2139 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params) 2140 { 2141 struct bnx2i_hba *hba = iscsi_host_priv(shost); 2142 char *buf = (char *) params; 2143 u16 len = sizeof(*params); 2144 2145 /* handled by cnic driver */ 2146 hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf, 2147 len); 2148 2149 return 0; 2150 } 2151 2152 2153 /* 2154 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template 2155 * used while registering with the scsi host and iSCSI transport module. 2156 */ 2157 static struct scsi_host_template bnx2i_host_template = { 2158 .module = THIS_MODULE, 2159 .name = "Broadcom Offload iSCSI Initiator", 2160 .proc_name = "bnx2i", 2161 .queuecommand = iscsi_queuecommand, 2162 .eh_abort_handler = iscsi_eh_abort, 2163 .eh_device_reset_handler = iscsi_eh_device_reset, 2164 .eh_target_reset_handler = iscsi_eh_recover_target, 2165 .change_queue_depth = iscsi_change_queue_depth, 2166 .can_queue = 1024, 2167 .max_sectors = 127, 2168 .cmd_per_lun = 24, 2169 .this_id = -1, 2170 .use_clustering = ENABLE_CLUSTERING, 2171 .sg_tablesize = ISCSI_MAX_BDS_PER_CMD, 2172 .shost_attrs = bnx2i_dev_attributes, 2173 }; 2174 2175 struct iscsi_transport bnx2i_iscsi_transport = { 2176 .owner = THIS_MODULE, 2177 .name = "bnx2i", 2178 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | 2179 CAP_MULTI_R2T | CAP_DATADGST | 2180 CAP_DATA_PATH_OFFLOAD | 2181 CAP_TEXT_NEGO, 2182 .param_mask = ISCSI_MAX_RECV_DLENGTH | 2183 ISCSI_MAX_XMIT_DLENGTH | 2184 ISCSI_HDRDGST_EN | 2185 ISCSI_DATADGST_EN | 2186 ISCSI_INITIAL_R2T_EN | 2187 ISCSI_MAX_R2T | 2188 ISCSI_IMM_DATA_EN | 2189 ISCSI_FIRST_BURST | 2190 ISCSI_MAX_BURST | 2191 ISCSI_PDU_INORDER_EN | 2192 ISCSI_DATASEQ_INORDER_EN | 2193 ISCSI_ERL | 2194 ISCSI_CONN_PORT | 2195 ISCSI_CONN_ADDRESS | 2196 ISCSI_EXP_STATSN | 2197 ISCSI_PERSISTENT_PORT | 2198 ISCSI_PERSISTENT_ADDRESS | 2199 ISCSI_TARGET_NAME | ISCSI_TPGT | 2200 ISCSI_USERNAME | ISCSI_PASSWORD | 2201 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | 2202 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | 2203 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO | 2204 ISCSI_PING_TMO | ISCSI_RECV_TMO | 2205 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, 2206 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | 2207 ISCSI_HOST_NETDEV_NAME, 2208 .create_session = bnx2i_session_create, 2209 .destroy_session = bnx2i_session_destroy, 2210 .create_conn = bnx2i_conn_create, 2211 .bind_conn = bnx2i_conn_bind, 2212 .destroy_conn = bnx2i_conn_destroy, 2213 .set_param = iscsi_set_param, 2214 .get_conn_param = iscsi_conn_get_param, 2215 .get_session_param = iscsi_session_get_param, 2216 .get_host_param = bnx2i_host_get_param, 2217 .start_conn = bnx2i_conn_start, 2218 .stop_conn = iscsi_conn_stop, 2219 .send_pdu = iscsi_conn_send_pdu, 2220 .xmit_task = bnx2i_task_xmit, 2221 .get_stats = bnx2i_conn_get_stats, 2222 /* TCP connect - disconnect - option-2 interface calls */ 2223 .get_ep_param = bnx2i_ep_get_param, 2224 .ep_connect = bnx2i_ep_connect, 2225 .ep_poll = bnx2i_ep_poll, 2226 .ep_disconnect = bnx2i_ep_disconnect, 2227 .set_path = bnx2i_nl_set_path, 2228 /* Error recovery timeout call */ 2229 .session_recovery_timedout = iscsi_session_recovery_timedout, 2230 .cleanup_task = bnx2i_cleanup_task, 2231 }; 2232