2307 lines · c
1/*2 * bnx2i_iscsi.c: QLogic NetXtreme II iSCSI driver.3 *4 * Copyright (c) 2006 - 2013 Broadcom Corporation5 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.6 * Copyright (c) 2007, 2008 Mike Christie7 * Copyright (c) 2014, QLogic Corporation8 *9 * This program is free software; you can redistribute it and/or modify10 * it under the terms of the GNU General Public License as published by11 * the Free Software Foundation.12 *13 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)14 * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)15 * Maintained by: QLogic-Storage-Upstream@qlogic.com16 */17 18#include <linux/slab.h>19#include <scsi/scsi_tcq.h>20#include <scsi/libiscsi.h>21#include "bnx2i.h"22 23struct scsi_transport_template *bnx2i_scsi_xport_template;24struct iscsi_transport bnx2i_iscsi_transport;25static const struct scsi_host_template bnx2i_host_template;26 27/*28 * Global endpoint resource info29 */30static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */31 32DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);33 34static int bnx2i_adapter_ready(struct bnx2i_hba *hba)35{36 int retval = 0;37 38 if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||39 test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||40 test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))41 retval = -EPERM;42 return retval;43}44 45/**46 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks47 * @cmd: iscsi cmd struct pointer48 * @buf_off: absolute buffer offset49 * @start_bd_off: u32 pointer to return the offset within the BD50 * indicated by 'start_bd_idx' on which 'buf_off' falls51 * @start_bd_idx: index of the BD on which 'buf_off' falls52 *53 * identifies & marks various bd info for scsi command's imm data,54 * unsolicited data and the first solicited data seq.55 */56static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,57 u32 *start_bd_off, u32 *start_bd_idx)58{59 struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;60 u32 cur_offset = 0;61 u32 cur_bd_idx = 0;62 63 if (buf_off) {64 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {65 cur_offset += bd_tbl->buffer_length;66 cur_bd_idx++;67 bd_tbl++;68 }69 }70 71 *start_bd_off = buf_off - cur_offset;72 *start_bd_idx = cur_bd_idx;73}74 75/**76 * bnx2i_setup_write_cmd_bd_info - sets up BD various information77 * @task: transport layer's cmd struct pointer78 *79 * identifies & marks various bd info for scsi command's immediate data,80 * unsolicited data and first solicited data seq which includes BD start81 * index & BD buf off. his function takes into account iscsi parameter such82 * as immediate data and unsolicited data is support on this connection.83 */84static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)85{86 struct bnx2i_cmd *cmd = task->dd_data;87 u32 start_bd_offset;88 u32 start_bd_idx;89 u32 buffer_offset = 0;90 u32 cmd_len = cmd->req.total_data_transfer_length;91 92 /* if ImmediateData is turned off & IntialR2T is turned on,93 * there will be no immediate or unsolicited data, just return.94 */95 if (!iscsi_task_has_unsol_data(task) && !task->imm_count)96 return;97 98 /* Immediate data */99 buffer_offset += task->imm_count;100 if (task->imm_count == cmd_len)101 return;102 103 if (iscsi_task_has_unsol_data(task)) {104 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,105 &start_bd_offset, &start_bd_idx);106 cmd->req.ud_buffer_offset = start_bd_offset;107 cmd->req.ud_start_bd_index = start_bd_idx;108 buffer_offset += task->unsol_r2t.data_length;109 }110 111 if (buffer_offset != cmd_len) {112 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,113 &start_bd_offset, &start_bd_idx);114 if ((start_bd_offset > task->conn->session->first_burst) ||115 (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {116 int i = 0;117 118 iscsi_conn_printk(KERN_ALERT, task->conn,119 "bnx2i- error, buf offset 0x%x "120 "bd_valid %d use_sg %d\n",121 buffer_offset, cmd->io_tbl.bd_valid,122 scsi_sg_count(cmd->scsi_cmd));123 for (i = 0; i < cmd->io_tbl.bd_valid; i++)124 iscsi_conn_printk(KERN_ALERT, task->conn,125 "bnx2i err, bd[%d]: len %x\n",126 i, cmd->io_tbl.bd_tbl[i].\127 buffer_length);128 }129 cmd->req.sd_buffer_offset = start_bd_offset;130 cmd->req.sd_start_bd_index = start_bd_idx;131 }132}133 134 135 136/**137 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table138 * @hba: adapter instance139 * @cmd: iscsi cmd struct pointer140 *141 * map SG list142 */143static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)144{145 struct scsi_cmnd *sc = cmd->scsi_cmd;146 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;147 struct scatterlist *sg;148 int byte_count = 0;149 int bd_count = 0;150 int sg_count;151 int sg_len;152 u64 addr;153 int i;154 155 BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);156 157 sg_count = scsi_dma_map(sc);158 159 scsi_for_each_sg(sc, sg, sg_count, i) {160 sg_len = sg_dma_len(sg);161 addr = (u64) sg_dma_address(sg);162 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;163 bd[bd_count].buffer_addr_hi = addr >> 32;164 bd[bd_count].buffer_length = sg_len;165 bd[bd_count].flags = 0;166 if (bd_count == 0)167 bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;168 169 byte_count += sg_len;170 bd_count++;171 }172 173 if (bd_count)174 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;175 176 BUG_ON(byte_count != scsi_bufflen(sc));177 return bd_count;178}179 180/**181 * bnx2i_iscsi_map_sg_list - maps SG list182 * @cmd: iscsi cmd struct pointer183 *184 * creates BD list table for the command185 */186static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)187{188 int bd_count;189 190 bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);191 if (!bd_count) {192 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;193 194 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;195 bd[0].buffer_length = bd[0].flags = 0;196 }197 cmd->io_tbl.bd_valid = bd_count;198}199 200 201/**202 * bnx2i_iscsi_unmap_sg_list - unmaps SG list203 * @cmd: iscsi cmd struct pointer204 *205 * unmap IO buffers and invalidate the BD table206 */207void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)208{209 struct scsi_cmnd *sc = cmd->scsi_cmd;210 211 if (cmd->io_tbl.bd_valid && sc) {212 scsi_dma_unmap(sc);213 cmd->io_tbl.bd_valid = 0;214 }215}216 217static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)218{219 memset(&cmd->req, 0x00, sizeof(cmd->req));220 cmd->req.op_code = 0xFF;221 cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;222 cmd->req.bd_list_addr_hi =223 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);224 225}226 227 228/**229 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'230 * @hba: pointer to adapter instance231 * @bnx2i_conn: pointer to iscsi connection232 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)233 *234 * update iscsi cid table entry with connection pointer. This enables235 * driver to quickly get hold of connection structure pointer in236 * completion/interrupt thread using iscsi context ID237 */238static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,239 struct bnx2i_conn *bnx2i_conn,240 u32 iscsi_cid)241{242 if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {243 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,244 "conn bind - entry #%d not free\n", iscsi_cid);245 return -EBUSY;246 }247 248 hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;249 return 0;250}251 252 253/**254 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr255 * @hba: pointer to adapter instance256 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)257 */258struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,259 u16 iscsi_cid)260{261 if (!hba->cid_que.conn_cid_tbl) {262 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");263 return NULL;264 265 } else if (iscsi_cid >= hba->max_active_conns) {266 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);267 return NULL;268 }269 return hba->cid_que.conn_cid_tbl[iscsi_cid];270}271 272 273/**274 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool275 * @hba: pointer to adapter instance276 */277static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)278{279 int idx;280 281 if (!hba->cid_que.cid_free_cnt)282 return -1;283 284 idx = hba->cid_que.cid_q_cons_idx;285 hba->cid_que.cid_q_cons_idx++;286 if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)287 hba->cid_que.cid_q_cons_idx = 0;288 289 hba->cid_que.cid_free_cnt--;290 return hba->cid_que.cid_que[idx];291}292 293 294/**295 * bnx2i_free_iscsi_cid - returns tcp port to free list296 * @hba: pointer to adapter instance297 * @iscsi_cid: iscsi context ID to free298 */299static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)300{301 int idx;302 303 if (iscsi_cid == (u16) -1)304 return;305 306 hba->cid_que.cid_free_cnt++;307 308 idx = hba->cid_que.cid_q_prod_idx;309 hba->cid_que.cid_que[idx] = iscsi_cid;310 hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;311 hba->cid_que.cid_q_prod_idx++;312 if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)313 hba->cid_que.cid_q_prod_idx = 0;314}315 316 317/**318 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue319 * @hba: pointer to adapter instance320 *321 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,322 * and initialize table attributes323 */324static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)325{326 int mem_size;327 int i;328 329 mem_size = hba->max_active_conns * sizeof(u32);330 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;331 332 hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);333 if (!hba->cid_que.cid_que_base)334 return -ENOMEM;335 336 mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);337 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;338 hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);339 if (!hba->cid_que.conn_cid_tbl) {340 kfree(hba->cid_que.cid_que_base);341 hba->cid_que.cid_que_base = NULL;342 return -ENOMEM;343 }344 345 hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;346 hba->cid_que.cid_q_prod_idx = 0;347 hba->cid_que.cid_q_cons_idx = 0;348 hba->cid_que.cid_q_max_idx = hba->max_active_conns;349 hba->cid_que.cid_free_cnt = hba->max_active_conns;350 351 for (i = 0; i < hba->max_active_conns; i++) {352 hba->cid_que.cid_que[i] = i;353 hba->cid_que.conn_cid_tbl[i] = NULL;354 }355 return 0;356}357 358 359/**360 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources361 * @hba: pointer to adapter instance362 */363static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)364{365 kfree(hba->cid_que.cid_que_base);366 hba->cid_que.cid_que_base = NULL;367 368 kfree(hba->cid_que.conn_cid_tbl);369 hba->cid_que.conn_cid_tbl = NULL;370}371 372 373/**374 * bnx2i_alloc_ep - allocates ep structure from global pool375 * @hba: pointer to adapter instance376 *377 * routine allocates a free endpoint structure from global pool and378 * a tcp port to be used for this connection. Global resource lock,379 * 'bnx2i_resc_lock' is held while accessing shared global data structures380 */381static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)382{383 struct iscsi_endpoint *ep;384 struct bnx2i_endpoint *bnx2i_ep;385 u32 ec_div;386 387 ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));388 if (!ep) {389 printk(KERN_ERR "bnx2i: Could not allocate ep\n");390 return NULL;391 }392 393 bnx2i_ep = ep->dd_data;394 bnx2i_ep->cls_ep = ep;395 INIT_LIST_HEAD(&bnx2i_ep->link);396 bnx2i_ep->state = EP_STATE_IDLE;397 bnx2i_ep->ep_iscsi_cid = (u16) -1;398 bnx2i_ep->hba = hba;399 bnx2i_ep->hba_age = hba->age;400 401 ec_div = event_coal_div;402 while (ec_div >>= 1)403 bnx2i_ep->ec_shift += 1;404 405 hba->ofld_conns_active++;406 init_waitqueue_head(&bnx2i_ep->ofld_wait);407 return ep;408}409 410 411/**412 * bnx2i_free_ep - free endpoint413 * @ep: pointer to iscsi endpoint structure414 */415static void bnx2i_free_ep(struct iscsi_endpoint *ep)416{417 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;418 unsigned long flags;419 420 spin_lock_irqsave(&bnx2i_resc_lock, flags);421 bnx2i_ep->state = EP_STATE_IDLE;422 bnx2i_ep->hba->ofld_conns_active--;423 424 if (bnx2i_ep->ep_iscsi_cid != (u16) -1)425 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);426 427 if (bnx2i_ep->conn) {428 bnx2i_ep->conn->ep = NULL;429 bnx2i_ep->conn = NULL;430 }431 432 bnx2i_ep->hba = NULL;433 spin_unlock_irqrestore(&bnx2i_resc_lock, flags);434 iscsi_destroy_endpoint(ep);435}436 437 438/**439 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command440 * @hba: adapter instance pointer441 * @session: iscsi session pointer442 * @cmd: iscsi command structure443 */444static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,445 struct bnx2i_cmd *cmd)446{447 struct io_bdt *io = &cmd->io_tbl;448 struct iscsi_bd *bd;449 450 io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,451 ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),452 &io->bd_tbl_dma, GFP_KERNEL);453 if (!io->bd_tbl) {454 iscsi_session_printk(KERN_ERR, session, "Could not "455 "allocate bdt.\n");456 return -ENOMEM;457 }458 io->bd_valid = 0;459 return 0;460}461 462/**463 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table464 * @hba: adapter instance pointer465 * @session: iscsi session pointer466 */467static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,468 struct iscsi_session *session)469{470 int i;471 472 for (i = 0; i < session->cmds_max; i++) {473 struct iscsi_task *task = session->cmds[i];474 struct bnx2i_cmd *cmd = task->dd_data;475 476 if (cmd->io_tbl.bd_tbl)477 dma_free_coherent(&hba->pcidev->dev,478 ISCSI_MAX_BDS_PER_CMD *479 sizeof(struct iscsi_bd),480 cmd->io_tbl.bd_tbl,481 cmd->io_tbl.bd_tbl_dma);482 }483 484}485 486 487/**488 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session489 * @hba: adapter instance pointer490 * @session: iscsi session pointer491 */492static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,493 struct iscsi_session *session)494{495 int i;496 497 for (i = 0; i < session->cmds_max; i++) {498 struct iscsi_task *task = session->cmds[i];499 struct bnx2i_cmd *cmd = task->dd_data;500 501 task->hdr = &cmd->hdr;502 task->hdr_max = sizeof(struct iscsi_hdr);503 504 if (bnx2i_alloc_bdt(hba, session, cmd))505 goto free_bdts;506 }507 508 return 0;509 510free_bdts:511 bnx2i_destroy_cmd_pool(hba, session);512 return -ENOMEM;513}514 515 516/**517 * bnx2i_setup_mp_bdt - allocate BD table resources518 * @hba: pointer to adapter structure519 *520 * Allocate memory for dummy buffer and associated BD521 * table to be used by middle path (MP) requests522 */523static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)524{525 int rc = 0;526 struct iscsi_bd *mp_bdt;527 u64 addr;528 529 hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,530 &hba->mp_bd_dma, GFP_KERNEL);531 if (!hba->mp_bd_tbl) {532 printk(KERN_ERR "unable to allocate Middle Path BDT\n");533 rc = -1;534 goto out;535 }536 537 hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev,538 CNIC_PAGE_SIZE,539 &hba->dummy_buf_dma, GFP_KERNEL);540 if (!hba->dummy_buffer) {541 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");542 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,543 hba->mp_bd_tbl, hba->mp_bd_dma);544 hba->mp_bd_tbl = NULL;545 rc = -1;546 goto out;547 }548 549 mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;550 addr = (unsigned long) hba->dummy_buf_dma;551 mp_bdt->buffer_addr_lo = addr & 0xffffffff;552 mp_bdt->buffer_addr_hi = addr >> 32;553 mp_bdt->buffer_length = CNIC_PAGE_SIZE;554 mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |555 ISCSI_BD_FIRST_IN_BD_CHAIN;556out:557 return rc;558}559 560 561/**562 * bnx2i_free_mp_bdt - releases ITT back to free pool563 * @hba: pointer to adapter instance564 *565 * free MP dummy buffer and associated BD table566 */567static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)568{569 if (hba->mp_bd_tbl) {570 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,571 hba->mp_bd_tbl, hba->mp_bd_dma);572 hba->mp_bd_tbl = NULL;573 }574 if (hba->dummy_buffer) {575 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,576 hba->dummy_buffer, hba->dummy_buf_dma);577 hba->dummy_buffer = NULL;578 }579 return;580}581 582/**583 * bnx2i_drop_session - notifies iscsid of connection error.584 * @cls_session: iscsi cls session pointer585 *586 * This notifies iscsid that there is a error, so it can initiate587 * recovery.588 *589 * This relies on caller using the iscsi class iterator so the object590 * is refcounted and does not disapper from under us.591 */592void bnx2i_drop_session(struct iscsi_cls_session *cls_session)593{594 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);595}596 597/**598 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list599 * @hba: pointer to adapter instance600 * @ep: pointer to endpoint (transport identifier) structure601 *602 * EP destroy queue manager603 */604static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,605 struct bnx2i_endpoint *ep)606{607 write_lock_bh(&hba->ep_rdwr_lock);608 list_add_tail(&ep->link, &hba->ep_destroy_list);609 write_unlock_bh(&hba->ep_rdwr_lock);610 return 0;611}612 613/**614 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list615 *616 * @hba: pointer to adapter instance617 * @ep: pointer to endpoint (transport identifier) structure618 *619 * EP destroy queue manager620 */621static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,622 struct bnx2i_endpoint *ep)623{624 write_lock_bh(&hba->ep_rdwr_lock);625 list_del_init(&ep->link);626 write_unlock_bh(&hba->ep_rdwr_lock);627 628 return 0;629}630 631/**632 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list633 * @hba: pointer to adapter instance634 * @ep: pointer to endpoint (transport identifier) structure635 *636 * pending conn offload completion queue manager637 */638static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,639 struct bnx2i_endpoint *ep)640{641 write_lock_bh(&hba->ep_rdwr_lock);642 list_add_tail(&ep->link, &hba->ep_ofld_list);643 write_unlock_bh(&hba->ep_rdwr_lock);644 return 0;645}646 647/**648 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list649 * @hba: pointer to adapter instance650 * @ep: pointer to endpoint (transport identifier) structure651 *652 * pending conn offload completion queue manager653 */654static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,655 struct bnx2i_endpoint *ep)656{657 write_lock_bh(&hba->ep_rdwr_lock);658 list_del_init(&ep->link);659 write_unlock_bh(&hba->ep_rdwr_lock);660 return 0;661}662 663 664/**665 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints666 *667 * @hba: pointer to adapter instance668 * @iscsi_cid: iscsi context ID to find669 *670 */671struct bnx2i_endpoint *672bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)673{674 struct list_head *list;675 struct list_head *tmp;676 struct bnx2i_endpoint *ep = NULL;677 678 read_lock_bh(&hba->ep_rdwr_lock);679 list_for_each_safe(list, tmp, &hba->ep_ofld_list) {680 ep = (struct bnx2i_endpoint *)list;681 682 if (ep->ep_iscsi_cid == iscsi_cid)683 break;684 ep = NULL;685 }686 read_unlock_bh(&hba->ep_rdwr_lock);687 688 if (!ep)689 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);690 return ep;691}692 693/**694 * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list695 * @hba: pointer to adapter instance696 * @iscsi_cid: iscsi context ID to find697 *698 */699struct bnx2i_endpoint *700bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)701{702 struct list_head *list;703 struct list_head *tmp;704 struct bnx2i_endpoint *ep = NULL;705 706 read_lock_bh(&hba->ep_rdwr_lock);707 list_for_each_safe(list, tmp, &hba->ep_destroy_list) {708 ep = (struct bnx2i_endpoint *)list;709 710 if (ep->ep_iscsi_cid == iscsi_cid)711 break;712 ep = NULL;713 }714 read_unlock_bh(&hba->ep_rdwr_lock);715 716 if (!ep)717 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);718 719 return ep;720}721 722/**723 * bnx2i_ep_active_list_add - add an entry to ep active list724 * @hba: pointer to adapter instance725 * @ep: pointer to endpoint (transport identifier) structure726 *727 * current active conn queue manager728 */729static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,730 struct bnx2i_endpoint *ep)731{732 write_lock_bh(&hba->ep_rdwr_lock);733 list_add_tail(&ep->link, &hba->ep_active_list);734 write_unlock_bh(&hba->ep_rdwr_lock);735}736 737 738/**739 * bnx2i_ep_active_list_del - deletes an entry to ep active list740 * @hba: pointer to adapter instance741 * @ep: pointer to endpoint (transport identifier) structure742 *743 * current active conn queue manager744 */745static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,746 struct bnx2i_endpoint *ep)747{748 write_lock_bh(&hba->ep_rdwr_lock);749 list_del_init(&ep->link);750 write_unlock_bh(&hba->ep_rdwr_lock);751}752 753 754/**755 * bnx2i_setup_host_queue_size - assigns shost->can_queue param756 * @hba: pointer to adapter instance757 * @shost: scsi host pointer758 *759 * Initializes 'can_queue' parameter based on how many outstanding commands760 * the device can handle. Each device 5708/5709/57710 has different761 * capabilities762 */763static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,764 struct Scsi_Host *shost)765{766 if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))767 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;768 else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))769 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;770 else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))771 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;772 else773 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;774}775 776 777/**778 * bnx2i_alloc_hba - allocate and init adapter instance779 * @cnic: cnic device pointer780 *781 * allocate & initialize adapter structure and call other782 * support routines to do per adapter initialization783 */784struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)785{786 struct Scsi_Host *shost;787 struct bnx2i_hba *hba;788 789 shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);790 if (!shost)791 return NULL;792 shost->dma_boundary = cnic->pcidev->dma_mask;793 shost->transportt = bnx2i_scsi_xport_template;794 shost->max_id = ISCSI_MAX_CONNS_PER_HBA - 1;795 shost->max_channel = 0;796 shost->max_lun = 512;797 shost->max_cmd_len = 16;798 799 hba = iscsi_host_priv(shost);800 hba->shost = shost;801 hba->netdev = cnic->netdev;802 /* Get PCI related information and update hba struct members */803 hba->pcidev = cnic->pcidev;804 pci_dev_get(hba->pcidev);805 hba->pci_did = hba->pcidev->device;806 hba->pci_vid = hba->pcidev->vendor;807 hba->pci_sdid = hba->pcidev->subsystem_device;808 hba->pci_svid = hba->pcidev->subsystem_vendor;809 hba->pci_func = PCI_FUNC(hba->pcidev->devfn);810 hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);811 812 bnx2i_identify_device(hba, cnic);813 bnx2i_setup_host_queue_size(hba, shost);814 815 hba->reg_base = pci_resource_start(hba->pcidev, 0);816 if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {817 hba->regview = pci_iomap(hba->pcidev, 0, BNX2_MQ_CONFIG2);818 if (!hba->regview)819 goto ioreg_map_err;820 } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {821 hba->regview = pci_iomap(hba->pcidev, 0, 4096);822 if (!hba->regview)823 goto ioreg_map_err;824 }825 826 if (bnx2i_setup_mp_bdt(hba))827 goto mp_bdt_mem_err;828 829 INIT_LIST_HEAD(&hba->ep_ofld_list);830 INIT_LIST_HEAD(&hba->ep_active_list);831 INIT_LIST_HEAD(&hba->ep_destroy_list);832 rwlock_init(&hba->ep_rdwr_lock);833 834 hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;835 836 /* different values for 5708/5709/57710 */837 hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;838 839 if (bnx2i_setup_free_cid_que(hba))840 goto cid_que_err;841 842 /* SQ/RQ/CQ size can be changed via sysfx interface */843 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {844 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)845 hba->max_sqes = sq_size;846 else847 hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;848 } else { /* 5706/5708/5709 */849 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)850 hba->max_sqes = sq_size;851 else852 hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;853 }854 855 hba->max_rqes = rq_size;856 hba->max_cqes = hba->max_sqes + rq_size;857 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {858 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)859 hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;860 } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)861 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;862 863 hba->num_ccell = hba->max_sqes / 2;864 865 spin_lock_init(&hba->lock);866 mutex_init(&hba->net_dev_lock);867 init_waitqueue_head(&hba->eh_wait);868 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {869 hba->hba_shutdown_tmo = 30 * HZ;870 hba->conn_teardown_tmo = 20 * HZ;871 hba->conn_ctx_destroy_tmo = 6 * HZ;872 } else { /* 5706/5708/5709 */873 hba->hba_shutdown_tmo = 20 * HZ;874 hba->conn_teardown_tmo = 10 * HZ;875 hba->conn_ctx_destroy_tmo = 2 * HZ;876 }877 878#ifdef CONFIG_32BIT879 spin_lock_init(&hba->stat_lock);880#endif881 memset(&hba->stats, 0, sizeof(struct iscsi_stats_info));882 883 if (iscsi_host_add(shost, &hba->pcidev->dev))884 goto free_dump_mem;885 return hba;886 887free_dump_mem:888 bnx2i_release_free_cid_que(hba);889cid_que_err:890 bnx2i_free_mp_bdt(hba);891mp_bdt_mem_err:892 if (hba->regview) {893 pci_iounmap(hba->pcidev, hba->regview);894 hba->regview = NULL;895 }896ioreg_map_err:897 pci_dev_put(hba->pcidev);898 scsi_host_put(shost);899 return NULL;900}901 902/**903 * bnx2i_free_hba- releases hba structure and resources held by the adapter904 * @hba: pointer to adapter instance905 *906 * free adapter structure and call various cleanup routines.907 */908void bnx2i_free_hba(struct bnx2i_hba *hba)909{910 struct Scsi_Host *shost = hba->shost;911 912 iscsi_host_remove(shost, false);913 INIT_LIST_HEAD(&hba->ep_ofld_list);914 INIT_LIST_HEAD(&hba->ep_active_list);915 INIT_LIST_HEAD(&hba->ep_destroy_list);916 917 if (hba->regview) {918 pci_iounmap(hba->pcidev, hba->regview);919 hba->regview = NULL;920 }921 pci_dev_put(hba->pcidev);922 bnx2i_free_mp_bdt(hba);923 bnx2i_release_free_cid_que(hba);924 iscsi_host_free(shost);925}926 927/**928 * bnx2i_conn_free_login_resources - free DMA resources used for login process929 * @hba: pointer to adapter instance930 * @bnx2i_conn: iscsi connection pointer931 *932 * Login related resources, mostly BDT & payload DMA memory is freed933 */934static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,935 struct bnx2i_conn *bnx2i_conn)936{937 if (bnx2i_conn->gen_pdu.resp_bd_tbl) {938 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,939 bnx2i_conn->gen_pdu.resp_bd_tbl,940 bnx2i_conn->gen_pdu.resp_bd_dma);941 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;942 }943 944 if (bnx2i_conn->gen_pdu.req_bd_tbl) {945 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,946 bnx2i_conn->gen_pdu.req_bd_tbl,947 bnx2i_conn->gen_pdu.req_bd_dma);948 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;949 }950 951 if (bnx2i_conn->gen_pdu.resp_buf) {952 dma_free_coherent(&hba->pcidev->dev,953 ISCSI_DEF_MAX_RECV_SEG_LEN,954 bnx2i_conn->gen_pdu.resp_buf,955 bnx2i_conn->gen_pdu.resp_dma_addr);956 bnx2i_conn->gen_pdu.resp_buf = NULL;957 }958 959 if (bnx2i_conn->gen_pdu.req_buf) {960 dma_free_coherent(&hba->pcidev->dev,961 ISCSI_DEF_MAX_RECV_SEG_LEN,962 bnx2i_conn->gen_pdu.req_buf,963 bnx2i_conn->gen_pdu.req_dma_addr);964 bnx2i_conn->gen_pdu.req_buf = NULL;965 }966}967 968/**969 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.970 * @hba: pointer to adapter instance971 * @bnx2i_conn: iscsi connection pointer972 *973 * Mgmt task DNA resources are allocated in this routine.974 */975static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,976 struct bnx2i_conn *bnx2i_conn)977{978 /* Allocate memory for login request/response buffers */979 bnx2i_conn->gen_pdu.req_buf =980 dma_alloc_coherent(&hba->pcidev->dev,981 ISCSI_DEF_MAX_RECV_SEG_LEN,982 &bnx2i_conn->gen_pdu.req_dma_addr,983 GFP_KERNEL);984 if (bnx2i_conn->gen_pdu.req_buf == NULL)985 goto login_req_buf_failure;986 987 bnx2i_conn->gen_pdu.req_buf_size = 0;988 bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;989 990 bnx2i_conn->gen_pdu.resp_buf =991 dma_alloc_coherent(&hba->pcidev->dev,992 ISCSI_DEF_MAX_RECV_SEG_LEN,993 &bnx2i_conn->gen_pdu.resp_dma_addr,994 GFP_KERNEL);995 if (bnx2i_conn->gen_pdu.resp_buf == NULL)996 goto login_resp_buf_failure;997 998 bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;999 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;1000 1001 bnx2i_conn->gen_pdu.req_bd_tbl =1002 dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,1003 &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);1004 if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)1005 goto login_req_bd_tbl_failure;1006 1007 bnx2i_conn->gen_pdu.resp_bd_tbl =1008 dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,1009 &bnx2i_conn->gen_pdu.resp_bd_dma,1010 GFP_KERNEL);1011 if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)1012 goto login_resp_bd_tbl_failure;1013 1014 return 0;1015 1016login_resp_bd_tbl_failure:1017 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,1018 bnx2i_conn->gen_pdu.req_bd_tbl,1019 bnx2i_conn->gen_pdu.req_bd_dma);1020 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;1021 1022login_req_bd_tbl_failure:1023 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,1024 bnx2i_conn->gen_pdu.resp_buf,1025 bnx2i_conn->gen_pdu.resp_dma_addr);1026 bnx2i_conn->gen_pdu.resp_buf = NULL;1027login_resp_buf_failure:1028 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,1029 bnx2i_conn->gen_pdu.req_buf,1030 bnx2i_conn->gen_pdu.req_dma_addr);1031 bnx2i_conn->gen_pdu.req_buf = NULL;1032login_req_buf_failure:1033 iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,1034 "login resource alloc failed!!\n");1035 return -ENOMEM;1036 1037}1038 1039 1040/**1041 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.1042 * @bnx2i_conn: iscsi connection pointer1043 *1044 * Allocates buffers and BD tables before shipping requests to cnic1045 * for PDUs prepared by 'iscsid' daemon1046 */1047static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)1048{1049 struct iscsi_bd *bd_tbl;1050 1051 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;1052 1053 bd_tbl->buffer_addr_hi =1054 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);1055 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;1056 bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -1057 bnx2i_conn->gen_pdu.req_buf;1058 bd_tbl->reserved0 = 0;1059 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |1060 ISCSI_BD_FIRST_IN_BD_CHAIN;1061 1062 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl;1063 bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;1064 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;1065 bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;1066 bd_tbl->reserved0 = 0;1067 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |1068 ISCSI_BD_FIRST_IN_BD_CHAIN;1069}1070 1071 1072/**1073 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.1074 * @task: transport layer task pointer1075 *1076 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,1077 * Nop-out and Logout requests flow through this path.1078 */1079static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)1080{1081 struct bnx2i_cmd *cmd = task->dd_data;1082 struct bnx2i_conn *bnx2i_conn = cmd->conn;1083 int rc = 0;1084 char *buf;1085 int data_len;1086 1087 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);1088 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {1089 case ISCSI_OP_LOGIN:1090 bnx2i_send_iscsi_login(bnx2i_conn, task);1091 break;1092 case ISCSI_OP_NOOP_OUT:1093 data_len = bnx2i_conn->gen_pdu.req_buf_size;1094 buf = bnx2i_conn->gen_pdu.req_buf;1095 if (data_len)1096 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,1097 buf, data_len, 1);1098 else1099 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,1100 NULL, 0, 1);1101 break;1102 case ISCSI_OP_LOGOUT:1103 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);1104 break;1105 case ISCSI_OP_SCSI_TMFUNC:1106 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);1107 break;1108 case ISCSI_OP_TEXT:1109 rc = bnx2i_send_iscsi_text(bnx2i_conn, task);1110 break;1111 default:1112 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,1113 "send_gen: unsupported op 0x%x\n",1114 task->hdr->opcode);1115 }1116 return rc;1117}1118 1119 1120/**********************************************************************1121 * SCSI-ML Interface1122 **********************************************************************/1123 1124/**1125 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe1126 * @sc: SCSI-ML command pointer1127 * @cmd: iscsi cmd pointer1128 */1129static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)1130{1131 u32 dword;1132 int lpcnt;1133 u8 *srcp;1134 u32 *dstp;1135 u32 scsi_lun[2];1136 1137 int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);1138 cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);1139 cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);1140 1141 lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);1142 srcp = (u8 *) sc->cmnd;1143 dstp = (u32 *) cmd->req.cdb;1144 while (lpcnt--) {1145 memcpy(&dword, (const void *) srcp, 4);1146 *dstp = cpu_to_be32(dword);1147 srcp += 4;1148 dstp++;1149 }1150 if (sc->cmd_len & 0x3) {1151 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);1152 *dstp = cpu_to_be32(dword);1153 }1154}1155 1156static void bnx2i_cleanup_task(struct iscsi_task *task)1157{1158 struct iscsi_conn *conn = task->conn;1159 struct bnx2i_conn *bnx2i_conn = conn->dd_data;1160 struct bnx2i_hba *hba = bnx2i_conn->hba;1161 1162 /*1163 * mgmt task or cmd was never sent to us to transmit.1164 */1165 if (!task->sc || task->state == ISCSI_TASK_PENDING)1166 return;1167 /*1168 * need to clean-up task context to claim dma buffers1169 */1170 if (task->state == ISCSI_TASK_ABRT_TMF) {1171 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);1172 1173 spin_unlock_bh(&conn->session->back_lock);1174 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,1175 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));1176 spin_lock_bh(&conn->session->back_lock);1177 }1178 bnx2i_iscsi_unmap_sg_list(task->dd_data);1179}1180 1181/**1182 * bnx2i_mtask_xmit - transmit mtask to chip for further processing1183 * @conn: transport layer conn structure pointer1184 * @task: transport layer command structure pointer1185 */1186static int1187bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)1188{1189 struct bnx2i_conn *bnx2i_conn = conn->dd_data;1190 struct bnx2i_hba *hba = bnx2i_conn->hba;1191 struct bnx2i_cmd *cmd = task->dd_data;1192 1193 memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);1194 1195 bnx2i_setup_cmd_wqe_template(cmd);1196 bnx2i_conn->gen_pdu.req_buf_size = task->data_count;1197 1198 /* Tx PDU/data length count */1199 ADD_STATS_64(hba, tx_pdus, 1);1200 ADD_STATS_64(hba, tx_bytes, task->data_count);1201 1202 if (task->data_count) {1203 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,1204 task->data_count);1205 bnx2i_conn->gen_pdu.req_wr_ptr =1206 bnx2i_conn->gen_pdu.req_buf + task->data_count;1207 }1208 cmd->conn = conn->dd_data;1209 cmd->scsi_cmd = NULL;1210 return bnx2i_iscsi_send_generic_request(task);1211}1212 1213/**1214 * bnx2i_task_xmit - transmit iscsi command to chip for further processing1215 * @task: transport layer command structure pointer1216 *1217 * maps SG buffers and send request to chip/firmware in the form of SQ WQE1218 */1219static int bnx2i_task_xmit(struct iscsi_task *task)1220{1221 struct iscsi_conn *conn = task->conn;1222 struct iscsi_session *session = conn->session;1223 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);1224 struct bnx2i_hba *hba = iscsi_host_priv(shost);1225 struct bnx2i_conn *bnx2i_conn = conn->dd_data;1226 struct scsi_cmnd *sc = task->sc;1227 struct bnx2i_cmd *cmd = task->dd_data;1228 struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;1229 1230 if (atomic_read(&bnx2i_conn->ep->num_active_cmds) + 1 >1231 hba->max_sqes)1232 return -ENOMEM;1233 1234 /*1235 * If there is no scsi_cmnd this must be a mgmt task1236 */1237 if (!sc)1238 return bnx2i_mtask_xmit(conn, task);1239 1240 bnx2i_setup_cmd_wqe_template(cmd);1241 cmd->req.op_code = ISCSI_OP_SCSI_CMD;1242 cmd->conn = bnx2i_conn;1243 cmd->scsi_cmd = sc;1244 cmd->req.total_data_transfer_length = scsi_bufflen(sc);1245 cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);1246 1247 bnx2i_iscsi_map_sg_list(cmd);1248 bnx2i_cpy_scsi_cdb(sc, cmd);1249 1250 cmd->req.op_attr = ISCSI_ATTR_SIMPLE;1251 if (sc->sc_data_direction == DMA_TO_DEVICE) {1252 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;1253 cmd->req.itt = task->itt |1254 (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);1255 bnx2i_setup_write_cmd_bd_info(task);1256 } else {1257 if (scsi_bufflen(sc))1258 cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;1259 cmd->req.itt = task->itt |1260 (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);1261 }1262 1263 cmd->req.num_bds = cmd->io_tbl.bd_valid;1264 if (!cmd->io_tbl.bd_valid) {1265 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;1266 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);1267 cmd->req.num_bds = 1;1268 }1269 1270 bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);1271 return 0;1272}1273 1274/**1275 * bnx2i_session_create - create a new iscsi session1276 * @ep: pointer to iscsi endpoint1277 * @cmds_max: user specified maximum commands1278 * @qdepth: scsi queue depth to support1279 * @initial_cmdsn: initial iscsi CMDSN to be used for this session1280 *1281 * Creates a new iSCSI session instance on given device.1282 */1283static struct iscsi_cls_session *1284bnx2i_session_create(struct iscsi_endpoint *ep,1285 uint16_t cmds_max, uint16_t qdepth,1286 uint32_t initial_cmdsn)1287{1288 struct Scsi_Host *shost;1289 struct iscsi_cls_session *cls_session;1290 struct bnx2i_hba *hba;1291 struct bnx2i_endpoint *bnx2i_ep;1292 1293 if (!ep) {1294 printk(KERN_ERR "bnx2i: missing ep.\n");1295 return NULL;1296 }1297 1298 bnx2i_ep = ep->dd_data;1299 shost = bnx2i_ep->hba->shost;1300 hba = iscsi_host_priv(shost);1301 if (bnx2i_adapter_ready(hba))1302 return NULL;1303 1304 /*1305 * user can override hw limit as long as it is within1306 * the min/max.1307 */1308 if (cmds_max > hba->max_sqes)1309 cmds_max = hba->max_sqes;1310 else if (cmds_max < BNX2I_SQ_WQES_MIN)1311 cmds_max = BNX2I_SQ_WQES_MIN;1312 1313 cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,1314 cmds_max, 0, sizeof(struct bnx2i_cmd),1315 initial_cmdsn, ISCSI_MAX_TARGET);1316 if (!cls_session)1317 return NULL;1318 1319 if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))1320 goto session_teardown;1321 return cls_session;1322 1323session_teardown:1324 iscsi_session_teardown(cls_session);1325 return NULL;1326}1327 1328 1329/**1330 * bnx2i_session_destroy - destroys iscsi session1331 * @cls_session: pointer to iscsi cls session1332 *1333 * Destroys previously created iSCSI session instance and releases1334 * all resources held by it1335 */1336static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)1337{1338 struct iscsi_session *session = cls_session->dd_data;1339 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);1340 struct bnx2i_hba *hba = iscsi_host_priv(shost);1341 1342 bnx2i_destroy_cmd_pool(hba, session);1343 iscsi_session_teardown(cls_session);1344}1345 1346 1347/**1348 * bnx2i_conn_create - create iscsi connection instance1349 * @cls_session: pointer to iscsi cls session1350 * @cid: iscsi cid as per rfc (not NX2's CID terminology)1351 *1352 * Creates a new iSCSI connection instance for a given session1353 */1354static struct iscsi_cls_conn *1355bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)1356{1357 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);1358 struct bnx2i_hba *hba = iscsi_host_priv(shost);1359 struct bnx2i_conn *bnx2i_conn;1360 struct iscsi_cls_conn *cls_conn;1361 struct iscsi_conn *conn;1362 1363 cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),1364 cid);1365 if (!cls_conn)1366 return NULL;1367 conn = cls_conn->dd_data;1368 1369 bnx2i_conn = conn->dd_data;1370 bnx2i_conn->cls_conn = cls_conn;1371 bnx2i_conn->hba = hba;1372 1373 atomic_set(&bnx2i_conn->work_cnt, 0);1374 1375 /* 'ep' ptr will be assigned in bind() call */1376 bnx2i_conn->ep = NULL;1377 init_completion(&bnx2i_conn->cmd_cleanup_cmpl);1378 1379 if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {1380 iscsi_conn_printk(KERN_ALERT, conn,1381 "conn_new: login resc alloc failed!!\n");1382 goto free_conn;1383 }1384 1385 return cls_conn;1386 1387free_conn:1388 iscsi_conn_teardown(cls_conn);1389 return NULL;1390}1391 1392/**1393 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together1394 * @cls_session: pointer to iscsi cls session1395 * @cls_conn: pointer to iscsi cls conn1396 * @transport_fd: 64-bit EP handle1397 * @is_leading: leading connection on this session?1398 *1399 * Binds together iSCSI session instance, iSCSI connection instance1400 * and the TCP connection. This routine returns error code if1401 * TCP connection does not belong on the device iSCSI sess/conn1402 * is bound1403 */1404static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,1405 struct iscsi_cls_conn *cls_conn,1406 uint64_t transport_fd, int is_leading)1407{1408 struct iscsi_conn *conn = cls_conn->dd_data;1409 struct bnx2i_conn *bnx2i_conn = conn->dd_data;1410 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);1411 struct bnx2i_hba *hba = iscsi_host_priv(shost);1412 struct bnx2i_endpoint *bnx2i_ep;1413 struct iscsi_endpoint *ep;1414 int ret_code;1415 1416 ep = iscsi_lookup_endpoint(transport_fd);1417 if (!ep)1418 return -EINVAL;1419 /*1420 * Forcefully terminate all in progress connection recovery at the1421 * earliest, either in bind(), send_pdu(LOGIN), or conn_start()1422 */1423 if (bnx2i_adapter_ready(hba)) {1424 ret_code = -EIO;1425 goto put_ep;1426 }1427 1428 bnx2i_ep = ep->dd_data;1429 if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||1430 (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD)) {1431 /* Peer disconnect via' FIN or RST */1432 ret_code = -EINVAL;1433 goto put_ep;1434 }1435 1436 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) {1437 ret_code = -EINVAL;1438 goto put_ep;1439 }1440 1441 if (bnx2i_ep->hba != hba) {1442 /* Error - TCP connection does not belong to this device1443 */1444 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,1445 "conn bind, ep=0x%p (%s) does not",1446 bnx2i_ep, bnx2i_ep->hba->netdev->name);1447 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,1448 "belong to hba (%s)\n",1449 hba->netdev->name);1450 ret_code = -EEXIST;1451 goto put_ep;1452 }1453 bnx2i_ep->conn = bnx2i_conn;1454 bnx2i_conn->ep = bnx2i_ep;1455 bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;1456 bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;1457 1458 ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,1459 bnx2i_ep->ep_iscsi_cid);1460 1461 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 577101462 * driver needs to explicitly replenish RQ index during setup.1463 */1464 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))1465 bnx2i_put_rq_buf(bnx2i_conn, 0);1466 1467 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);1468put_ep:1469 iscsi_put_endpoint(ep);1470 return ret_code;1471}1472 1473 1474/**1475 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources1476 * @cls_conn: pointer to iscsi cls conn1477 *1478 * Destroy an iSCSI connection instance and release memory resources held by1479 * this connection1480 */1481static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)1482{1483 struct iscsi_conn *conn = cls_conn->dd_data;1484 struct bnx2i_conn *bnx2i_conn = conn->dd_data;1485 struct Scsi_Host *shost;1486 struct bnx2i_hba *hba;1487 struct bnx2i_work *work, *tmp;1488 unsigned cpu = 0;1489 struct bnx2i_percpu_s *p;1490 1491 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));1492 hba = iscsi_host_priv(shost);1493 1494 bnx2i_conn_free_login_resources(hba, bnx2i_conn);1495 1496 if (atomic_read(&bnx2i_conn->work_cnt)) {1497 for_each_online_cpu(cpu) {1498 p = &per_cpu(bnx2i_percpu, cpu);1499 spin_lock_bh(&p->p_work_lock);1500 list_for_each_entry_safe(work, tmp,1501 &p->work_list, list) {1502 if (work->session == conn->session &&1503 work->bnx2i_conn == bnx2i_conn) {1504 list_del_init(&work->list);1505 kfree(work);1506 if (!atomic_dec_and_test(1507 &bnx2i_conn->work_cnt))1508 break;1509 }1510 }1511 spin_unlock_bh(&p->p_work_lock);1512 }1513 }1514 1515 iscsi_conn_teardown(cls_conn);1516}1517 1518 1519/**1520 * bnx2i_ep_get_param - return iscsi ep parameter to caller1521 * @ep: pointer to iscsi endpoint1522 * @param: parameter type identifier1523 * @buf: buffer pointer1524 *1525 * returns iSCSI ep parameters1526 */1527static int bnx2i_ep_get_param(struct iscsi_endpoint *ep,1528 enum iscsi_param param, char *buf)1529{1530 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;1531 struct bnx2i_hba *hba = bnx2i_ep->hba;1532 int len = -ENOTCONN;1533 1534 if (!hba)1535 return -ENOTCONN;1536 1537 switch (param) {1538 case ISCSI_PARAM_CONN_PORT:1539 mutex_lock(&hba->net_dev_lock);1540 if (bnx2i_ep->cm_sk)1541 len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port);1542 mutex_unlock(&hba->net_dev_lock);1543 break;1544 case ISCSI_PARAM_CONN_ADDRESS:1545 mutex_lock(&hba->net_dev_lock);1546 if (bnx2i_ep->cm_sk)1547 len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip);1548 mutex_unlock(&hba->net_dev_lock);1549 break;1550 default:1551 return -ENOSYS;1552 }1553 1554 return len;1555}1556 1557/**1558 * bnx2i_host_get_param - returns host (adapter) related parameters1559 * @shost: scsi host pointer1560 * @param: parameter type identifier1561 * @buf: buffer pointer1562 */1563static int bnx2i_host_get_param(struct Scsi_Host *shost,1564 enum iscsi_host_param param, char *buf)1565{1566 struct bnx2i_hba *hba = iscsi_host_priv(shost);1567 int len = 0;1568 1569 switch (param) {1570 case ISCSI_HOST_PARAM_HWADDRESS:1571 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);1572 break;1573 case ISCSI_HOST_PARAM_NETDEV_NAME:1574 len = sprintf(buf, "%s\n", hba->netdev->name);1575 break;1576 case ISCSI_HOST_PARAM_IPADDRESS: {1577 struct list_head *active_list = &hba->ep_active_list;1578 1579 read_lock_bh(&hba->ep_rdwr_lock);1580 if (!list_empty(&hba->ep_active_list)) {1581 struct bnx2i_endpoint *bnx2i_ep;1582 struct cnic_sock *csk;1583 1584 bnx2i_ep = list_first_entry(active_list,1585 struct bnx2i_endpoint,1586 link);1587 csk = bnx2i_ep->cm_sk;1588 if (test_bit(SK_F_IPV6, &csk->flags))1589 len = sprintf(buf, "%pI6\n", csk->src_ip);1590 else1591 len = sprintf(buf, "%pI4\n", csk->src_ip);1592 }1593 read_unlock_bh(&hba->ep_rdwr_lock);1594 break;1595 }1596 default:1597 return iscsi_host_get_param(shost, param, buf);1598 }1599 return len;1600}1601 1602/**1603 * bnx2i_conn_start - completes iscsi connection migration to FFP1604 * @cls_conn: pointer to iscsi cls conn1605 *1606 * last call in FFP migration to handover iscsi conn to the driver1607 */1608static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)1609{1610 struct iscsi_conn *conn = cls_conn->dd_data;1611 struct bnx2i_conn *bnx2i_conn = conn->dd_data;1612 1613 bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;1614 bnx2i_update_iscsi_conn(conn);1615 1616 /*1617 * this should normally not sleep for a long time so it should1618 * not disrupt the caller.1619 */1620 timer_setup(&bnx2i_conn->ep->ofld_timer, bnx2i_ep_ofld_timer, 0);1621 bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;1622 add_timer(&bnx2i_conn->ep->ofld_timer);1623 /* update iSCSI context for this conn, wait for CNIC to complete */1624 wait_event_interruptible(bnx2i_conn->ep->ofld_wait,1625 bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);1626 1627 if (signal_pending(current))1628 flush_signals(current);1629 del_timer_sync(&bnx2i_conn->ep->ofld_timer);1630 1631 iscsi_conn_start(cls_conn);1632 return 0;1633}1634 1635 1636/**1637 * bnx2i_conn_get_stats - returns iSCSI stats1638 * @cls_conn: pointer to iscsi cls conn1639 * @stats: pointer to iscsi statistic struct1640 */1641static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,1642 struct iscsi_stats *stats)1643{1644 struct iscsi_conn *conn = cls_conn->dd_data;1645 1646 stats->txdata_octets = conn->txdata_octets;1647 stats->rxdata_octets = conn->rxdata_octets;1648 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;1649 stats->dataout_pdus = conn->dataout_pdus_cnt;1650 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;1651 stats->datain_pdus = conn->datain_pdus_cnt;1652 stats->r2t_pdus = conn->r2t_pdus_cnt;1653 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;1654 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;1655 stats->digest_err = 0;1656 stats->timeout_err = 0;1657 strcpy(stats->custom[0].desc, "eh_abort_cnt");1658 stats->custom[0].value = conn->eh_abort_cnt;1659 stats->custom_length = 1;1660}1661 1662 1663/**1664 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices1665 * @dst_addr: target IP address1666 *1667 * check if route resolves to BNX2 device1668 */1669static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)1670{1671 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;1672 struct bnx2i_hba *hba;1673 struct cnic_dev *cnic = NULL;1674 1675 hba = get_adapter_list_head();1676 if (hba && hba->cnic)1677 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);1678 if (!cnic) {1679 printk(KERN_ALERT "bnx2i: no route,"1680 "can't connect using cnic\n");1681 goto no_nx2_route;1682 }1683 hba = bnx2i_find_hba_for_cnic(cnic);1684 if (!hba)1685 goto no_nx2_route;1686 1687 if (bnx2i_adapter_ready(hba)) {1688 printk(KERN_ALERT "bnx2i: check route, hba not found\n");1689 goto no_nx2_route;1690 }1691 if (hba->netdev->mtu > hba->mtu_supported) {1692 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",1693 hba->netdev->name, hba->netdev->mtu);1694 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",1695 hba->mtu_supported);1696 goto no_nx2_route;1697 }1698 return hba;1699no_nx2_route:1700 return NULL;1701}1702 1703 1704/**1705 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources1706 * @hba: pointer to adapter instance1707 * @ep: endpoint (transport identifier) structure1708 *1709 * destroys cm_sock structure and on chip iscsi context1710 */1711static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,1712 struct bnx2i_endpoint *ep)1713{1714 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)1715 hba->cnic->cm_destroy(ep->cm_sk);1716 1717 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&1718 ep->state == EP_STATE_DISCONN_TIMEDOUT) {1719 if (ep->conn && ep->conn->cls_conn &&1720 ep->conn->cls_conn->dd_data) {1721 struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;1722 1723 /* Must suspend all rx queue activity for this ep */1724 set_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags);1725 }1726 /* CONN_DISCONNECT timeout may or may not be an issue depending1727 * on what transcribed in TCP layer, different targets behave1728 * differently1729 */1730 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "1731 "please submit GRC Dump, NW/PCIe trace, "1732 "driver msgs to developers for analysis\n",1733 hba->netdev->name);1734 }1735 1736 ep->state = EP_STATE_CLEANUP_START;1737 timer_setup(&ep->ofld_timer, bnx2i_ep_ofld_timer, 0);1738 ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;1739 add_timer(&ep->ofld_timer);1740 1741 bnx2i_ep_destroy_list_add(hba, ep);1742 1743 /* destroy iSCSI context, wait for it to complete */1744 if (bnx2i_send_conn_destroy(hba, ep))1745 ep->state = EP_STATE_CLEANUP_CMPL;1746 1747 wait_event_interruptible(ep->ofld_wait,1748 (ep->state != EP_STATE_CLEANUP_START));1749 1750 if (signal_pending(current))1751 flush_signals(current);1752 del_timer_sync(&ep->ofld_timer);1753 1754 bnx2i_ep_destroy_list_del(hba, ep);1755 1756 if (ep->state != EP_STATE_CLEANUP_CMPL)1757 /* should never happen */1758 printk(KERN_ALERT "bnx2i - conn destroy failed\n");1759 1760 return 0;1761}1762 1763 1764/**1765 * bnx2i_ep_connect - establish TCP connection to target portal1766 * @shost: scsi host1767 * @dst_addr: target IP address1768 * @non_blocking: blocking or non-blocking call1769 *1770 * this routine initiates the TCP/IP connection by invoking Option-2 i/f1771 * with l5_core and the CNIC. This is a multi-step process of resolving1772 * route to target, create a iscsi connection context, handshaking with1773 * CNIC module to create/initialize the socket struct and finally1774 * sending down option-2 request to complete TCP 3-way handshake1775 */1776static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,1777 struct sockaddr *dst_addr,1778 int non_blocking)1779{1780 u32 iscsi_cid = BNX2I_CID_RESERVED;1781 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;1782 struct sockaddr_in6 *desti6;1783 struct bnx2i_endpoint *bnx2i_ep;1784 struct bnx2i_hba *hba;1785 struct cnic_dev *cnic;1786 struct cnic_sockaddr saddr;1787 struct iscsi_endpoint *ep;1788 int rc = 0;1789 1790 if (shost) {1791 /* driver is given scsi host to work with */1792 hba = iscsi_host_priv(shost);1793 } else1794 /*1795 * check if the given destination can be reached through1796 * a iscsi capable NetXtreme2 device1797 */1798 hba = bnx2i_check_route(dst_addr);1799 1800 if (!hba) {1801 rc = -EINVAL;1802 goto nohba;1803 }1804 mutex_lock(&hba->net_dev_lock);1805 1806 if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) {1807 rc = -EPERM;1808 goto check_busy;1809 }1810 cnic = hba->cnic;1811 ep = bnx2i_alloc_ep(hba);1812 if (!ep) {1813 rc = -ENOMEM;1814 goto check_busy;1815 }1816 bnx2i_ep = ep->dd_data;1817 1818 atomic_set(&bnx2i_ep->num_active_cmds, 0);1819 iscsi_cid = bnx2i_alloc_iscsi_cid(hba);1820 if (iscsi_cid == -1) {1821 printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate "1822 "iscsi cid\n", hba->netdev->name);1823 rc = -ENOMEM;1824 bnx2i_free_ep(ep);1825 goto check_busy;1826 }1827 bnx2i_ep->hba_age = hba->age;1828 1829 rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);1830 if (rc != 0) {1831 printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error"1832 "\n", hba->netdev->name);1833 rc = -ENOMEM;1834 goto qp_resc_err;1835 }1836 1837 bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;1838 bnx2i_ep->state = EP_STATE_OFLD_START;1839 bnx2i_ep_ofld_list_add(hba, bnx2i_ep);1840 1841 timer_setup(&bnx2i_ep->ofld_timer, bnx2i_ep_ofld_timer, 0);1842 bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;1843 add_timer(&bnx2i_ep->ofld_timer);1844 1845 if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) {1846 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {1847 printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",1848 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);1849 rc = -EBUSY;1850 } else1851 rc = -ENOSPC;1852 printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe"1853 "\n", hba->netdev->name);1854 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);1855 goto conn_failed;1856 }1857 1858 /* Wait for CNIC hardware to setup conn context and return 'cid' */1859 wait_event_interruptible(bnx2i_ep->ofld_wait,1860 bnx2i_ep->state != EP_STATE_OFLD_START);1861 1862 if (signal_pending(current))1863 flush_signals(current);1864 del_timer_sync(&bnx2i_ep->ofld_timer);1865 1866 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);1867 1868 if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {1869 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {1870 printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",1871 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);1872 rc = -EBUSY;1873 } else1874 rc = -ENOSPC;1875 goto conn_failed;1876 }1877 1878 rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,1879 iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);1880 if (rc) {1881 rc = -EINVAL;1882 /* Need to terminate and cleanup the connection */1883 goto release_ep;1884 }1885 1886 bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;1887 bnx2i_ep->cm_sk->snd_buf = 256 * 1024;1888 clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);1889 1890 memset(&saddr, 0, sizeof(saddr));1891 if (dst_addr->sa_family == AF_INET) {1892 desti = (struct sockaddr_in *) dst_addr;1893 saddr.remote.v4 = *desti;1894 saddr.local.v4.sin_family = desti->sin_family;1895 } else if (dst_addr->sa_family == AF_INET6) {1896 desti6 = (struct sockaddr_in6 *) dst_addr;1897 saddr.remote.v6 = *desti6;1898 saddr.local.v6.sin6_family = desti6->sin6_family;1899 }1900 1901 bnx2i_ep->timestamp = jiffies;1902 bnx2i_ep->state = EP_STATE_CONNECT_START;1903 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {1904 rc = -EINVAL;1905 goto conn_failed;1906 } else1907 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);1908 if (rc)1909 goto release_ep;1910 1911 bnx2i_ep_active_list_add(hba, bnx2i_ep);1912 1913 rc = bnx2i_map_ep_dbell_regs(bnx2i_ep);1914 if (rc)1915 goto del_active_ep;1916 1917 mutex_unlock(&hba->net_dev_lock);1918 return ep;1919 1920del_active_ep:1921 bnx2i_ep_active_list_del(hba, bnx2i_ep);1922release_ep:1923 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {1924 mutex_unlock(&hba->net_dev_lock);1925 return ERR_PTR(rc);1926 }1927conn_failed:1928 bnx2i_free_qp_resc(hba, bnx2i_ep);1929qp_resc_err:1930 bnx2i_free_ep(ep);1931check_busy:1932 mutex_unlock(&hba->net_dev_lock);1933nohba:1934 return ERR_PTR(rc);1935}1936 1937 1938/**1939 * bnx2i_ep_poll - polls for TCP connection establishement1940 * @ep: TCP connection (endpoint) handle1941 * @timeout_ms: timeout value in milli secs1942 *1943 * polls for TCP connect request to complete1944 */1945static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)1946{1947 struct bnx2i_endpoint *bnx2i_ep;1948 int rc = 0;1949 1950 bnx2i_ep = ep->dd_data;1951 if ((bnx2i_ep->state == EP_STATE_IDLE) ||1952 (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||1953 (bnx2i_ep->state == EP_STATE_OFLD_FAILED))1954 return -1;1955 if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)1956 return 1;1957 1958 rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,1959 ((bnx2i_ep->state ==1960 EP_STATE_OFLD_FAILED) ||1961 (bnx2i_ep->state ==1962 EP_STATE_CONNECT_FAILED) ||1963 (bnx2i_ep->state ==1964 EP_STATE_CONNECT_COMPL)),1965 msecs_to_jiffies(timeout_ms));1966 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)1967 rc = -1;1968 1969 if (rc > 0)1970 return 1;1971 else if (!rc)1972 return 0; /* timeout */1973 else1974 return rc;1975}1976 1977 1978/**1979 * bnx2i_ep_tcp_conn_active - check EP state transition1980 * @bnx2i_ep: endpoint pointer1981 *1982 * check if underlying TCP connection is active1983 */1984static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)1985{1986 int ret;1987 int cnic_dev_10g = 0;1988 1989 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))1990 cnic_dev_10g = 1;1991 1992 switch (bnx2i_ep->state) {1993 case EP_STATE_CLEANUP_FAILED:1994 case EP_STATE_OFLD_FAILED:1995 case EP_STATE_DISCONN_TIMEDOUT:1996 ret = 0;1997 break;1998 case EP_STATE_CONNECT_START:1999 case EP_STATE_CONNECT_FAILED:2000 case EP_STATE_CONNECT_COMPL:2001 case EP_STATE_ULP_UPDATE_START:2002 case EP_STATE_ULP_UPDATE_COMPL:2003 case EP_STATE_TCP_FIN_RCVD:2004 case EP_STATE_LOGOUT_SENT:2005 case EP_STATE_LOGOUT_RESP_RCVD:2006 case EP_STATE_ULP_UPDATE_FAILED:2007 ret = 1;2008 break;2009 case EP_STATE_TCP_RST_RCVD:2010 if (cnic_dev_10g)2011 ret = 0;2012 else2013 ret = 1;2014 break;2015 default:2016 ret = 0;2017 }2018 2019 return ret;2020}2021 2022 2023/**2024 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw2025 * @bnx2i_ep: TCP connection (bnx2i endpoint) handle2026 *2027 * executes TCP connection teardown process2028 */2029int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)2030{2031 struct bnx2i_hba *hba = bnx2i_ep->hba;2032 struct cnic_dev *cnic;2033 struct iscsi_session *session = NULL;2034 struct iscsi_conn *conn = NULL;2035 int ret = 0;2036 int close = 0;2037 int close_ret = 0;2038 2039 if (!hba)2040 return 0;2041 2042 cnic = hba->cnic;2043 if (!cnic)2044 return 0;2045 2046 if (bnx2i_ep->state == EP_STATE_IDLE ||2047 bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)2048 return 0;2049 2050 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))2051 goto destroy_conn;2052 2053 if (bnx2i_ep->conn) {2054 conn = bnx2i_ep->conn->cls_conn->dd_data;2055 session = conn->session;2056 }2057 2058 timer_setup(&bnx2i_ep->ofld_timer, bnx2i_ep_ofld_timer, 0);2059 bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;2060 add_timer(&bnx2i_ep->ofld_timer);2061 2062 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))2063 goto out;2064 2065 if (session) {2066 spin_lock_bh(&session->frwd_lock);2067 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {2068 if (session->state == ISCSI_STATE_LOGGING_OUT) {2069 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {2070 /* Logout sent, but no resp */2071 printk(KERN_ALERT "bnx2i (%s): WARNING"2072 " logout response was not "2073 "received!\n",2074 bnx2i_ep->hba->netdev->name);2075 } else if (bnx2i_ep->state ==2076 EP_STATE_LOGOUT_RESP_RCVD)2077 close = 1;2078 }2079 } else2080 close = 1;2081 2082 spin_unlock_bh(&session->frwd_lock);2083 }2084 2085 bnx2i_ep->state = EP_STATE_DISCONN_START;2086 2087 if (close)2088 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);2089 else2090 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);2091 2092 if (close_ret)2093 printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n",2094 bnx2i_ep->hba->netdev->name, close, close_ret);2095 else2096 /* wait for option-2 conn teardown */2097 wait_event_interruptible(bnx2i_ep->ofld_wait,2098 ((bnx2i_ep->state != EP_STATE_DISCONN_START)2099 && (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD)));2100 2101 if (signal_pending(current))2102 flush_signals(current);2103 del_timer_sync(&bnx2i_ep->ofld_timer);2104 2105destroy_conn:2106 bnx2i_ep_active_list_del(hba, bnx2i_ep);2107 if (bnx2i_tear_down_conn(hba, bnx2i_ep))2108 return -EINVAL;2109out:2110 bnx2i_ep->state = EP_STATE_IDLE;2111 return ret;2112}2113 2114 2115/**2116 * bnx2i_ep_disconnect - executes TCP connection teardown process2117 * @ep: TCP connection (iscsi endpoint) handle2118 *2119 * executes TCP connection teardown process2120 */2121static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)2122{2123 struct bnx2i_endpoint *bnx2i_ep;2124 struct bnx2i_conn *bnx2i_conn = NULL;2125 struct bnx2i_hba *hba;2126 2127 bnx2i_ep = ep->dd_data;2128 2129 /* driver should not attempt connection cleanup until TCP_CONNECT2130 * completes either successfully or fails. Timeout is 9-secs, so2131 * wait for it to complete2132 */2133 while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&2134 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))2135 msleep(250);2136 2137 if (bnx2i_ep->conn)2138 bnx2i_conn = bnx2i_ep->conn;2139 hba = bnx2i_ep->hba;2140 2141 mutex_lock(&hba->net_dev_lock);2142 2143 if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)2144 goto out;2145 2146 if (bnx2i_ep->state == EP_STATE_IDLE)2147 goto free_resc;2148 2149 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||2150 (bnx2i_ep->hba_age != hba->age)) {2151 bnx2i_ep_active_list_del(hba, bnx2i_ep);2152 goto free_resc;2153 }2154 2155 /* Do all chip cleanup here */2156 if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {2157 mutex_unlock(&hba->net_dev_lock);2158 return;2159 }2160free_resc:2161 bnx2i_free_qp_resc(hba, bnx2i_ep);2162 2163 if (bnx2i_conn)2164 bnx2i_conn->ep = NULL;2165 2166 bnx2i_free_ep(ep);2167out:2168 mutex_unlock(&hba->net_dev_lock);2169 2170 wake_up_interruptible(&hba->eh_wait);2171}2172 2173 2174/**2175 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler2176 * @shost: scsi host pointer2177 * @params: pointer to buffer containing iscsi path message2178 */2179static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)2180{2181 struct bnx2i_hba *hba = iscsi_host_priv(shost);2182 char *buf = (char *) params;2183 u16 len = sizeof(*params);2184 2185 /* handled by cnic driver */2186 hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,2187 len);2188 2189 return 0;2190}2191 2192static umode_t bnx2i_attr_is_visible(int param_type, int param)2193{2194 switch (param_type) {2195 case ISCSI_HOST_PARAM:2196 switch (param) {2197 case ISCSI_HOST_PARAM_NETDEV_NAME:2198 case ISCSI_HOST_PARAM_HWADDRESS:2199 case ISCSI_HOST_PARAM_IPADDRESS:2200 return S_IRUGO;2201 default:2202 return 0;2203 }2204 case ISCSI_PARAM:2205 switch (param) {2206 case ISCSI_PARAM_MAX_RECV_DLENGTH:2207 case ISCSI_PARAM_MAX_XMIT_DLENGTH:2208 case ISCSI_PARAM_HDRDGST_EN:2209 case ISCSI_PARAM_DATADGST_EN:2210 case ISCSI_PARAM_CONN_ADDRESS:2211 case ISCSI_PARAM_CONN_PORT:2212 case ISCSI_PARAM_EXP_STATSN:2213 case ISCSI_PARAM_PERSISTENT_ADDRESS:2214 case ISCSI_PARAM_PERSISTENT_PORT:2215 case ISCSI_PARAM_PING_TMO:2216 case ISCSI_PARAM_RECV_TMO:2217 case ISCSI_PARAM_INITIAL_R2T_EN:2218 case ISCSI_PARAM_MAX_R2T:2219 case ISCSI_PARAM_IMM_DATA_EN:2220 case ISCSI_PARAM_FIRST_BURST:2221 case ISCSI_PARAM_MAX_BURST:2222 case ISCSI_PARAM_PDU_INORDER_EN:2223 case ISCSI_PARAM_DATASEQ_INORDER_EN:2224 case ISCSI_PARAM_ERL:2225 case ISCSI_PARAM_TARGET_NAME:2226 case ISCSI_PARAM_TPGT:2227 case ISCSI_PARAM_USERNAME:2228 case ISCSI_PARAM_PASSWORD:2229 case ISCSI_PARAM_USERNAME_IN:2230 case ISCSI_PARAM_PASSWORD_IN:2231 case ISCSI_PARAM_FAST_ABORT:2232 case ISCSI_PARAM_ABORT_TMO:2233 case ISCSI_PARAM_LU_RESET_TMO:2234 case ISCSI_PARAM_TGT_RESET_TMO:2235 case ISCSI_PARAM_IFACE_NAME:2236 case ISCSI_PARAM_INITIATOR_NAME:2237 case ISCSI_PARAM_BOOT_ROOT:2238 case ISCSI_PARAM_BOOT_NIC:2239 case ISCSI_PARAM_BOOT_TARGET:2240 return S_IRUGO;2241 default:2242 return 0;2243 }2244 }2245 2246 return 0;2247}2248 2249/*2250 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template2251 * used while registering with the scsi host and iSCSI transport module.2252 */2253static const struct scsi_host_template bnx2i_host_template = {2254 .module = THIS_MODULE,2255 .name = "QLogic Offload iSCSI Initiator",2256 .proc_name = "bnx2i",2257 .queuecommand = iscsi_queuecommand,2258 .eh_timed_out = iscsi_eh_cmd_timed_out,2259 .eh_abort_handler = iscsi_eh_abort,2260 .eh_device_reset_handler = iscsi_eh_device_reset,2261 .eh_target_reset_handler = iscsi_eh_recover_target,2262 .change_queue_depth = scsi_change_queue_depth,2263 .target_alloc = iscsi_target_alloc,2264 .can_queue = 2048,2265 .max_sectors = 127,2266 .cmd_per_lun = 128,2267 .this_id = -1,2268 .sg_tablesize = ISCSI_MAX_BDS_PER_CMD,2269 .shost_groups = bnx2i_dev_groups,2270 .track_queue_depth = 1,2271 .cmd_size = sizeof(struct iscsi_cmd),2272};2273 2274struct iscsi_transport bnx2i_iscsi_transport = {2275 .owner = THIS_MODULE,2276 .name = "bnx2i",2277 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST |2278 CAP_MULTI_R2T | CAP_DATADGST |2279 CAP_DATA_PATH_OFFLOAD |2280 CAP_TEXT_NEGO,2281 .create_session = bnx2i_session_create,2282 .destroy_session = bnx2i_session_destroy,2283 .create_conn = bnx2i_conn_create,2284 .bind_conn = bnx2i_conn_bind,2285 .unbind_conn = iscsi_conn_unbind,2286 .destroy_conn = bnx2i_conn_destroy,2287 .attr_is_visible = bnx2i_attr_is_visible,2288 .set_param = iscsi_set_param,2289 .get_conn_param = iscsi_conn_get_param,2290 .get_session_param = iscsi_session_get_param,2291 .get_host_param = bnx2i_host_get_param,2292 .start_conn = bnx2i_conn_start,2293 .stop_conn = iscsi_conn_stop,2294 .send_pdu = iscsi_conn_send_pdu,2295 .xmit_task = bnx2i_task_xmit,2296 .get_stats = bnx2i_conn_get_stats,2297 /* TCP connect - disconnect - option-2 interface calls */2298 .get_ep_param = bnx2i_ep_get_param,2299 .ep_connect = bnx2i_ep_connect,2300 .ep_poll = bnx2i_ep_poll,2301 .ep_disconnect = bnx2i_ep_disconnect,2302 .set_path = bnx2i_nl_set_path,2303 /* Error recovery timeout call */2304 .session_recovery_timedout = iscsi_session_recovery_timedout,2305 .cleanup_task = bnx2i_cleanup_task,2306};2307