scsi/bnx2i/bnx2i_iscsi.c

0001 /*
0002  * bnx2i_iscsi.c: QLogic NetXtreme II iSCSI driver.
0003  *
0004  * Copyright (c) 2006 - 2013 Broadcom Corporation
0005  * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
0006  * Copyright (c) 2007, 2008 Mike Christie
0007  * Copyright (c) 2014, QLogic Corporation
0008  *
0009  * This program is free software; you can redistribute it and/or modify
0010  * it under the terms of the GNU General Public License as published by
0011  * the Free Software Foundation.
0012  *
0013  * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
0014  * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
0015  * Maintained by: QLogic-Storage-Upstream@qlogic.com
0016  */
0017
0018 #include <linux/slab.h>
0019 #include <scsi/scsi_tcq.h>
0020 #include <scsi/libiscsi.h>
0021 #include "bnx2i.h"
0022
0023 struct scsi_transport_template *bnx2i_scsi_xport_template;
0024 struct iscsi_transport bnx2i_iscsi_transport;
0025 static struct scsi_host_template bnx2i_host_template;
0026
0027 /*
0028  * Global endpoint resource info
0029  */
0030 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
0031
0032 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
0033
0034 static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
0035 {
0036     int retval = 0;
0037
0038     if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
0039         test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
0040         test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
0041         retval = -EPERM;
0042     return retval;
0043 }
0044
0045 /**
0046  * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
0047  * @cmd:        iscsi cmd struct pointer
0048  * @buf_off:        absolute buffer offset
0049  * @start_bd_off:   u32 pointer to return the offset within the BD
0050  *          indicated by 'start_bd_idx' on which 'buf_off' falls
0051  * @start_bd_idx:   index of the BD on which 'buf_off' falls
0052  *
0053  * identifies & marks various bd info for scsi command's imm data,
0054  * unsolicited data and the first solicited data seq.
0055  */
0056 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
0057                        u32 *start_bd_off, u32 *start_bd_idx)
0058 {
0059     struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
0060     u32 cur_offset = 0;
0061     u32 cur_bd_idx = 0;
0062
0063     if (buf_off) {
0064         while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
0065             cur_offset += bd_tbl->buffer_length;
0066             cur_bd_idx++;
0067             bd_tbl++;
0068         }
0069     }
0070
0071     *start_bd_off = buf_off - cur_offset;
0072     *start_bd_idx = cur_bd_idx;
0073 }
0074
0075 /**
0076  * bnx2i_setup_write_cmd_bd_info - sets up BD various information
0077  * @task:   transport layer's cmd struct pointer
0078  *
0079  * identifies & marks various bd info for scsi command's immediate data,
0080  * unsolicited data and first solicited data seq which includes BD start
0081  * index & BD buf off. his function takes into account iscsi parameter such
0082  * as immediate data and unsolicited data is support on this connection.
0083  */
0084 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
0085 {
0086     struct bnx2i_cmd *cmd = task->dd_data;
0087     u32 start_bd_offset;
0088     u32 start_bd_idx;
0089     u32 buffer_offset = 0;
0090     u32 cmd_len = cmd->req.total_data_transfer_length;
0091
0092     /* if ImmediateData is turned off & IntialR2T is turned on,
0093      * there will be no immediate or unsolicited data, just return.
0094      */
0095     if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
0096         return;
0097
0098     /* Immediate data */
0099     buffer_offset += task->imm_count;
0100     if (task->imm_count == cmd_len)
0101         return;
0102
0103     if (iscsi_task_has_unsol_data(task)) {
0104         bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
0105                        &start_bd_offset, &start_bd_idx);
0106         cmd->req.ud_buffer_offset = start_bd_offset;
0107         cmd->req.ud_start_bd_index = start_bd_idx;
0108         buffer_offset += task->unsol_r2t.data_length;
0109     }
0110
0111     if (buffer_offset != cmd_len) {
0112         bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
0113                        &start_bd_offset, &start_bd_idx);
0114         if ((start_bd_offset > task->conn->session->first_burst) ||
0115             (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
0116             int i = 0;
0117
0118             iscsi_conn_printk(KERN_ALERT, task->conn,
0119                       "bnx2i- error, buf offset 0x%x "
0120                       "bd_valid %d use_sg %d\n",
0121                       buffer_offset, cmd->io_tbl.bd_valid,
0122                       scsi_sg_count(cmd->scsi_cmd));
0123             for (i = 0; i < cmd->io_tbl.bd_valid; i++)
0124                 iscsi_conn_printk(KERN_ALERT, task->conn,
0125                           "bnx2i err, bd[%d]: len %x\n",
0126                           i, cmd->io_tbl.bd_tbl[i].\
0127                           buffer_length);
0128         }
0129         cmd->req.sd_buffer_offset = start_bd_offset;
0130         cmd->req.sd_start_bd_index = start_bd_idx;
0131     }
0132 }
0133
0134
0135
0136 /**
0137  * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
0138  * @hba:    adapter instance
0139  * @cmd:    iscsi cmd struct pointer
0140  *
0141  * map SG list
0142  */
0143 static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
0144 {
0145     struct scsi_cmnd *sc = cmd->scsi_cmd;
0146     struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
0147     struct scatterlist *sg;
0148     int byte_count = 0;
0149     int bd_count = 0;
0150     int sg_count;
0151     int sg_len;
0152     u64 addr;
0153     int i;
0154
0155     BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
0156
0157     sg_count = scsi_dma_map(sc);
0158
0159     scsi_for_each_sg(sc, sg, sg_count, i) {
0160         sg_len = sg_dma_len(sg);
0161         addr = (u64) sg_dma_address(sg);
0162         bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
0163         bd[bd_count].buffer_addr_hi = addr >> 32;
0164         bd[bd_count].buffer_length = sg_len;
0165         bd[bd_count].flags = 0;
0166         if (bd_count == 0)
0167             bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
0168
0169         byte_count += sg_len;
0170         bd_count++;
0171     }
0172
0173     if (bd_count)
0174         bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
0175
0176     BUG_ON(byte_count != scsi_bufflen(sc));
0177     return bd_count;
0178 }
0179
0180 /**
0181  * bnx2i_iscsi_map_sg_list - maps SG list
0182  * @cmd:    iscsi cmd struct pointer
0183  *
0184  * creates BD list table for the command
0185  */
0186 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
0187 {
0188     int bd_count;
0189
0190     bd_count  = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
0191     if (!bd_count) {
0192         struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
0193
0194         bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
0195         bd[0].buffer_length = bd[0].flags = 0;
0196     }
0197     cmd->io_tbl.bd_valid = bd_count;
0198 }
0199
0200
0201 /**
0202  * bnx2i_iscsi_unmap_sg_list - unmaps SG list
0203  * @cmd:    iscsi cmd struct pointer
0204  *
0205  * unmap IO buffers and invalidate the BD table
0206  */
0207 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
0208 {
0209     struct scsi_cmnd *sc = cmd->scsi_cmd;
0210
0211     if (cmd->io_tbl.bd_valid && sc) {
0212         scsi_dma_unmap(sc);
0213         cmd->io_tbl.bd_valid = 0;
0214     }
0215 }
0216
0217 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
0218 {
0219     memset(&cmd->req, 0x00, sizeof(cmd->req));
0220     cmd->req.op_code = 0xFF;
0221     cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
0222     cmd->req.bd_list_addr_hi =
0223         (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
0224
0225 }
0226
0227
0228 /**
0229  * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
0230  * @hba:    pointer to adapter instance
0231  * @bnx2i_conn: pointer to iscsi connection
0232  * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
0233  *
0234  * update iscsi cid table entry with connection pointer. This enables
0235  *  driver to quickly get hold of connection structure pointer in
0236  *  completion/interrupt thread using iscsi context ID
0237  */
0238 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
0239                     struct bnx2i_conn *bnx2i_conn,
0240                     u32 iscsi_cid)
0241 {
0242     if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
0243         iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
0244                  "conn bind - entry #%d not free\n", iscsi_cid);
0245         return -EBUSY;
0246     }
0247
0248     hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
0249     return 0;
0250 }
0251
0252
0253 /**
0254  * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
0255  * @hba:    pointer to adapter instance
0256  * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
0257  */
0258 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
0259                       u16 iscsi_cid)
0260 {
0261     if (!hba->cid_que.conn_cid_tbl) {
0262         printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
0263         return NULL;
0264
0265     } else if (iscsi_cid >= hba->max_active_conns) {
0266         printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
0267         return NULL;
0268     }
0269     return hba->cid_que.conn_cid_tbl[iscsi_cid];
0270 }
0271
0272
0273 /**
0274  * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
0275  * @hba:    pointer to adapter instance
0276  */
0277 static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
0278 {
0279     int idx;
0280
0281     if (!hba->cid_que.cid_free_cnt)
0282         return -1;
0283
0284     idx = hba->cid_que.cid_q_cons_idx;
0285     hba->cid_que.cid_q_cons_idx++;
0286     if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
0287         hba->cid_que.cid_q_cons_idx = 0;
0288
0289     hba->cid_que.cid_free_cnt--;
0290     return hba->cid_que.cid_que[idx];
0291 }
0292
0293
0294 /**
0295  * bnx2i_free_iscsi_cid - returns tcp port to free list
0296  * @hba:        pointer to adapter instance
0297  * @iscsi_cid:      iscsi context ID to free
0298  */
0299 static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
0300 {
0301     int idx;
0302
0303     if (iscsi_cid == (u16) -1)
0304         return;
0305
0306     hba->cid_que.cid_free_cnt++;
0307
0308     idx = hba->cid_que.cid_q_prod_idx;
0309     hba->cid_que.cid_que[idx] = iscsi_cid;
0310     hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
0311     hba->cid_que.cid_q_prod_idx++;
0312     if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
0313         hba->cid_que.cid_q_prod_idx = 0;
0314 }
0315
0316
0317 /**
0318  * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
0319  * @hba:    pointer to adapter instance
0320  *
0321  * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
0322  *  and initialize table attributes
0323  */
0324 static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
0325 {
0326     int mem_size;
0327     int i;
0328
0329     mem_size = hba->max_active_conns * sizeof(u32);
0330     mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
0331
0332     hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
0333     if (!hba->cid_que.cid_que_base)
0334         return -ENOMEM;
0335
0336     mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
0337     mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
0338     hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
0339     if (!hba->cid_que.conn_cid_tbl) {
0340         kfree(hba->cid_que.cid_que_base);
0341         hba->cid_que.cid_que_base = NULL;
0342         return -ENOMEM;
0343     }
0344
0345     hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
0346     hba->cid_que.cid_q_prod_idx = 0;
0347     hba->cid_que.cid_q_cons_idx = 0;
0348     hba->cid_que.cid_q_max_idx = hba->max_active_conns;
0349     hba->cid_que.cid_free_cnt = hba->max_active_conns;
0350
0351     for (i = 0; i < hba->max_active_conns; i++) {
0352         hba->cid_que.cid_que[i] = i;
0353         hba->cid_que.conn_cid_tbl[i] = NULL;
0354     }
0355     return 0;
0356 }
0357
0358
0359 /**
0360  * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
0361  * @hba:    pointer to adapter instance
0362  */
0363 static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
0364 {
0365     kfree(hba->cid_que.cid_que_base);
0366     hba->cid_que.cid_que_base = NULL;
0367
0368     kfree(hba->cid_que.conn_cid_tbl);
0369     hba->cid_que.conn_cid_tbl = NULL;
0370 }
0371
0372
0373 /**
0374  * bnx2i_alloc_ep - allocates ep structure from global pool
0375  * @hba:    pointer to adapter instance
0376  *
0377  * routine allocates a free endpoint structure from global pool and
0378  *  a tcp port to be used for this connection.  Global resource lock,
0379  *  'bnx2i_resc_lock' is held while accessing shared global data structures
0380  */
0381 static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
0382 {
0383     struct iscsi_endpoint *ep;
0384     struct bnx2i_endpoint *bnx2i_ep;
0385     u32 ec_div;
0386
0387     ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
0388     if (!ep) {
0389         printk(KERN_ERR "bnx2i: Could not allocate ep\n");
0390         return NULL;
0391     }
0392
0393     bnx2i_ep = ep->dd_data;
0394     bnx2i_ep->cls_ep = ep;
0395     INIT_LIST_HEAD(&bnx2i_ep->link);
0396     bnx2i_ep->state = EP_STATE_IDLE;
0397     bnx2i_ep->ep_iscsi_cid = (u16) -1;
0398     bnx2i_ep->hba = hba;
0399     bnx2i_ep->hba_age = hba->age;
0400
0401     ec_div = event_coal_div;
0402     while (ec_div >>= 1)
0403         bnx2i_ep->ec_shift += 1;
0404
0405     hba->ofld_conns_active++;
0406     init_waitqueue_head(&bnx2i_ep->ofld_wait);
0407     return ep;
0408 }
0409
0410
0411 /**
0412  * bnx2i_free_ep - free endpoint
0413  * @ep:     pointer to iscsi endpoint structure
0414  */
0415 static void bnx2i_free_ep(struct iscsi_endpoint *ep)
0416 {
0417     struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
0418     unsigned long flags;
0419
0420     spin_lock_irqsave(&bnx2i_resc_lock, flags);
0421     bnx2i_ep->state = EP_STATE_IDLE;
0422     bnx2i_ep->hba->ofld_conns_active--;
0423
0424     if (bnx2i_ep->ep_iscsi_cid != (u16) -1)
0425         bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
0426
0427     if (bnx2i_ep->conn) {
0428         bnx2i_ep->conn->ep = NULL;
0429         bnx2i_ep->conn = NULL;
0430     }
0431
0432     bnx2i_ep->hba = NULL;
0433     spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
0434     iscsi_destroy_endpoint(ep);
0435 }
0436
0437
0438 /**
0439  * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
0440  * @hba:    adapter instance pointer
0441  * @session:    iscsi session pointer
0442  * @cmd:    iscsi command structure
0443  */
0444 static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
0445                struct bnx2i_cmd *cmd)
0446 {
0447     struct io_bdt *io = &cmd->io_tbl;
0448     struct iscsi_bd *bd;
0449
0450     io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
0451                     ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
0452                     &io->bd_tbl_dma, GFP_KERNEL);
0453     if (!io->bd_tbl) {
0454         iscsi_session_printk(KERN_ERR, session, "Could not "
0455                      "allocate bdt.\n");
0456         return -ENOMEM;
0457     }
0458     io->bd_valid = 0;
0459     return 0;
0460 }
0461
0462 /**
0463  * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
0464  * @hba:    adapter instance pointer
0465  * @session:    iscsi session pointer
0466  */
0467 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
0468                    struct iscsi_session *session)
0469 {
0470     int i;
0471
0472     for (i = 0; i < session->cmds_max; i++) {
0473         struct iscsi_task *task = session->cmds[i];
0474         struct bnx2i_cmd *cmd = task->dd_data;
0475
0476         if (cmd->io_tbl.bd_tbl)
0477             dma_free_coherent(&hba->pcidev->dev,
0478                       ISCSI_MAX_BDS_PER_CMD *
0479                       sizeof(struct iscsi_bd),
0480                       cmd->io_tbl.bd_tbl,
0481                       cmd->io_tbl.bd_tbl_dma);
0482     }
0483
0484 }
0485
0486
0487 /**
0488  * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
0489  * @hba:    adapter instance pointer
0490  * @session:    iscsi session pointer
0491  */
0492 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
0493                 struct iscsi_session *session)
0494 {
0495     int i;
0496
0497     for (i = 0; i < session->cmds_max; i++) {
0498         struct iscsi_task *task = session->cmds[i];
0499         struct bnx2i_cmd *cmd = task->dd_data;
0500
0501         task->hdr = &cmd->hdr;
0502         task->hdr_max = sizeof(struct iscsi_hdr);
0503
0504         if (bnx2i_alloc_bdt(hba, session, cmd))
0505             goto free_bdts;
0506     }
0507
0508     return 0;
0509
0510 free_bdts:
0511     bnx2i_destroy_cmd_pool(hba, session);
0512     return -ENOMEM;
0513 }
0514
0515
0516 /**
0517  * bnx2i_setup_mp_bdt - allocate BD table resources
0518  * @hba:    pointer to adapter structure
0519  *
0520  * Allocate memory for dummy buffer and associated BD
0521  * table to be used by middle path (MP) requests
0522  */
0523 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
0524 {
0525     int rc = 0;
0526     struct iscsi_bd *mp_bdt;
0527     u64 addr;
0528
0529     hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
0530                         &hba->mp_bd_dma, GFP_KERNEL);
0531     if (!hba->mp_bd_tbl) {
0532         printk(KERN_ERR "unable to allocate Middle Path BDT\n");
0533         rc = -1;
0534         goto out;
0535     }
0536
0537     hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev,
0538                            CNIC_PAGE_SIZE,
0539                            &hba->dummy_buf_dma, GFP_KERNEL);
0540     if (!hba->dummy_buffer) {
0541         printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
0542         dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
0543                   hba->mp_bd_tbl, hba->mp_bd_dma);
0544         hba->mp_bd_tbl = NULL;
0545         rc = -1;
0546         goto out;
0547     }
0548
0549     mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
0550     addr = (unsigned long) hba->dummy_buf_dma;
0551     mp_bdt->buffer_addr_lo = addr & 0xffffffff;
0552     mp_bdt->buffer_addr_hi = addr >> 32;
0553     mp_bdt->buffer_length = CNIC_PAGE_SIZE;
0554     mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
0555             ISCSI_BD_FIRST_IN_BD_CHAIN;
0556 out:
0557     return rc;
0558 }
0559
0560
0561 /**
0562  * bnx2i_free_mp_bdt - releases ITT back to free pool
0563  * @hba:    pointer to adapter instance
0564  *
0565  * free MP dummy buffer and associated BD table
0566  */
0567 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
0568 {
0569     if (hba->mp_bd_tbl) {
0570         dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
0571                   hba->mp_bd_tbl, hba->mp_bd_dma);
0572         hba->mp_bd_tbl = NULL;
0573     }
0574     if (hba->dummy_buffer) {
0575         dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
0576                   hba->dummy_buffer, hba->dummy_buf_dma);
0577         hba->dummy_buffer = NULL;
0578     }
0579     return;
0580 }
0581
0582 /**
0583  * bnx2i_drop_session - notifies iscsid of connection error.
0584  * @cls_session:    iscsi cls session pointer
0585  *
0586  * This notifies iscsid that there is a error, so it can initiate
0587  * recovery.
0588  *
0589  * This relies on caller using the iscsi class iterator so the object
0590  * is refcounted and does not disapper from under us.
0591  */
0592 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
0593 {
0594     iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
0595 }
0596
0597 /**
0598  * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
0599  * @hba:    pointer to adapter instance
0600  * @ep:     pointer to endpoint (transport identifier) structure
0601  *
0602  * EP destroy queue manager
0603  */
0604 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
0605                      struct bnx2i_endpoint *ep)
0606 {
0607     write_lock_bh(&hba->ep_rdwr_lock);
0608     list_add_tail(&ep->link, &hba->ep_destroy_list);
0609     write_unlock_bh(&hba->ep_rdwr_lock);
0610     return 0;
0611 }
0612
0613 /**
0614  * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
0615  *
0616  * @hba:        pointer to adapter instance
0617  * @ep:         pointer to endpoint (transport identifier) structure
0618  *
0619  * EP destroy queue manager
0620  */
0621 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
0622                      struct bnx2i_endpoint *ep)
0623 {
0624     write_lock_bh(&hba->ep_rdwr_lock);
0625     list_del_init(&ep->link);
0626     write_unlock_bh(&hba->ep_rdwr_lock);
0627
0628     return 0;
0629 }
0630
0631 /**
0632  * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
0633  * @hba:    pointer to adapter instance
0634  * @ep:     pointer to endpoint (transport identifier) structure
0635  *
0636  * pending conn offload completion queue manager
0637  */
0638 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
0639                   struct bnx2i_endpoint *ep)
0640 {
0641     write_lock_bh(&hba->ep_rdwr_lock);
0642     list_add_tail(&ep->link, &hba->ep_ofld_list);
0643     write_unlock_bh(&hba->ep_rdwr_lock);
0644     return 0;
0645 }
0646
0647 /**
0648  * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
0649  * @hba:        pointer to adapter instance
0650  * @ep:         pointer to endpoint (transport identifier) structure
0651  *
0652  * pending conn offload completion queue manager
0653  */
0654 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
0655                   struct bnx2i_endpoint *ep)
0656 {
0657     write_lock_bh(&hba->ep_rdwr_lock);
0658     list_del_init(&ep->link);
0659     write_unlock_bh(&hba->ep_rdwr_lock);
0660     return 0;
0661 }
0662
0663
0664 /**
0665  * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
0666  *
0667  * @hba:        pointer to adapter instance
0668  * @iscsi_cid:      iscsi context ID to find
0669  *
0670  */
0671 struct bnx2i_endpoint *
0672 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
0673 {
0674     struct list_head *list;
0675     struct list_head *tmp;
0676     struct bnx2i_endpoint *ep = NULL;
0677
0678     read_lock_bh(&hba->ep_rdwr_lock);
0679     list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
0680         ep = (struct bnx2i_endpoint *)list;
0681
0682         if (ep->ep_iscsi_cid == iscsi_cid)
0683             break;
0684         ep = NULL;
0685     }
0686     read_unlock_bh(&hba->ep_rdwr_lock);
0687
0688     if (!ep)
0689         printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
0690     return ep;
0691 }
0692
0693 /**
0694  * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
0695  * @hba:        pointer to adapter instance
0696  * @iscsi_cid:      iscsi context ID to find
0697  *
0698  */
0699 struct bnx2i_endpoint *
0700 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
0701 {
0702     struct list_head *list;
0703     struct list_head *tmp;
0704     struct bnx2i_endpoint *ep = NULL;
0705
0706     read_lock_bh(&hba->ep_rdwr_lock);
0707     list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
0708         ep = (struct bnx2i_endpoint *)list;
0709
0710         if (ep->ep_iscsi_cid == iscsi_cid)
0711             break;
0712         ep = NULL;
0713     }
0714     read_unlock_bh(&hba->ep_rdwr_lock);
0715
0716     if (!ep)
0717         printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
0718
0719     return ep;
0720 }
0721
0722 /**
0723  * bnx2i_ep_active_list_add - add an entry to ep active list
0724  * @hba:    pointer to adapter instance
0725  * @ep:     pointer to endpoint (transport identifier) structure
0726  *
0727  * current active conn queue manager
0728  */
0729 static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
0730                      struct bnx2i_endpoint *ep)
0731 {
0732     write_lock_bh(&hba->ep_rdwr_lock);
0733     list_add_tail(&ep->link, &hba->ep_active_list);
0734     write_unlock_bh(&hba->ep_rdwr_lock);
0735 }
0736
0737
0738 /**
0739  * bnx2i_ep_active_list_del - deletes an entry to ep active list
0740  * @hba:    pointer to adapter instance
0741  * @ep:     pointer to endpoint (transport identifier) structure
0742  *
0743  * current active conn queue manager
0744  */
0745 static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,
0746                      struct bnx2i_endpoint *ep)
0747 {
0748     write_lock_bh(&hba->ep_rdwr_lock);
0749     list_del_init(&ep->link);
0750     write_unlock_bh(&hba->ep_rdwr_lock);
0751 }
0752
0753
0754 /**
0755  * bnx2i_setup_host_queue_size - assigns shost->can_queue param
0756  * @hba:    pointer to adapter instance
0757  * @shost:  scsi host pointer
0758  *
0759  * Initializes 'can_queue' parameter based on how many outstanding commands
0760  *  the device can handle. Each device 5708/5709/57710 has different
0761  *  capabilities
0762  */
0763 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
0764                     struct Scsi_Host *shost)
0765 {
0766     if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
0767         shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
0768     else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
0769         shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
0770     else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
0771         shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
0772     else
0773         shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
0774 }
0775
0776
0777 /**
0778  * bnx2i_alloc_hba - allocate and init adapter instance
0779  * @cnic:   cnic device pointer
0780  *
0781  * allocate & initialize adapter structure and call other
0782  *  support routines to do per adapter initialization
0783  */
0784 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
0785 {
0786     struct Scsi_Host *shost;
0787     struct bnx2i_hba *hba;
0788
0789     shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
0790     if (!shost)
0791         return NULL;
0792     shost->dma_boundary = cnic->pcidev->dma_mask;
0793     shost->transportt = bnx2i_scsi_xport_template;
0794     shost->max_id = ISCSI_MAX_CONNS_PER_HBA - 1;
0795     shost->max_channel = 0;
0796     shost->max_lun = 512;
0797     shost->max_cmd_len = 16;
0798
0799     hba = iscsi_host_priv(shost);
0800     hba->shost = shost;
0801     hba->netdev = cnic->netdev;
0802     /* Get PCI related information and update hba struct members */
0803     hba->pcidev = cnic->pcidev;
0804     pci_dev_get(hba->pcidev);
0805     hba->pci_did = hba->pcidev->device;
0806     hba->pci_vid = hba->pcidev->vendor;
0807     hba->pci_sdid = hba->pcidev->subsystem_device;
0808     hba->pci_svid = hba->pcidev->subsystem_vendor;
0809     hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
0810     hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
0811
0812     bnx2i_identify_device(hba, cnic);
0813     bnx2i_setup_host_queue_size(hba, shost);
0814
0815     hba->reg_base = pci_resource_start(hba->pcidev, 0);
0816     if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
0817         hba->regview = pci_iomap(hba->pcidev, 0, BNX2_MQ_CONFIG2);
0818         if (!hba->regview)
0819             goto ioreg_map_err;
0820     } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
0821         hba->regview = pci_iomap(hba->pcidev, 0, 4096);
0822         if (!hba->regview)
0823             goto ioreg_map_err;
0824     }
0825
0826     if (bnx2i_setup_mp_bdt(hba))
0827         goto mp_bdt_mem_err;
0828
0829     INIT_LIST_HEAD(&hba->ep_ofld_list);
0830     INIT_LIST_HEAD(&hba->ep_active_list);
0831     INIT_LIST_HEAD(&hba->ep_destroy_list);
0832     rwlock_init(&hba->ep_rdwr_lock);
0833
0834     hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
0835
0836     /* different values for 5708/5709/57710 */
0837     hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
0838
0839     if (bnx2i_setup_free_cid_que(hba))
0840         goto cid_que_err;
0841
0842     /* SQ/RQ/CQ size can be changed via sysfx interface */
0843     if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
0844         if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
0845             hba->max_sqes = sq_size;
0846         else
0847             hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
0848     } else {    /* 5706/5708/5709 */
0849         if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
0850             hba->max_sqes = sq_size;
0851         else
0852             hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
0853     }
0854
0855     hba->max_rqes = rq_size;
0856     hba->max_cqes = hba->max_sqes + rq_size;
0857     if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
0858         if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
0859             hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
0860     } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
0861         hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
0862
0863     hba->num_ccell = hba->max_sqes / 2;
0864
0865     spin_lock_init(&hba->lock);
0866     mutex_init(&hba->net_dev_lock);
0867     init_waitqueue_head(&hba->eh_wait);
0868     if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
0869         hba->hba_shutdown_tmo = 30 * HZ;
0870         hba->conn_teardown_tmo = 20 * HZ;
0871         hba->conn_ctx_destroy_tmo = 6 * HZ;
0872     } else {    /* 5706/5708/5709 */
0873         hba->hba_shutdown_tmo = 20 * HZ;
0874         hba->conn_teardown_tmo = 10 * HZ;
0875         hba->conn_ctx_destroy_tmo = 2 * HZ;
0876     }
0877
0878 #ifdef CONFIG_32BIT
0879     spin_lock_init(&hba->stat_lock);
0880 #endif
0881     memset(&hba->stats, 0, sizeof(struct iscsi_stats_info));
0882
0883     if (iscsi_host_add(shost, &hba->pcidev->dev))
0884         goto free_dump_mem;
0885     return hba;
0886
0887 free_dump_mem:
0888     bnx2i_release_free_cid_que(hba);
0889 cid_que_err:
0890     bnx2i_free_mp_bdt(hba);
0891 mp_bdt_mem_err:
0892     if (hba->regview) {
0893         pci_iounmap(hba->pcidev, hba->regview);
0894         hba->regview = NULL;
0895     }
0896 ioreg_map_err:
0897     pci_dev_put(hba->pcidev);
0898     scsi_host_put(shost);
0899     return NULL;
0900 }
0901
0902 /**
0903  * bnx2i_free_hba- releases hba structure and resources held by the adapter
0904  * @hba:    pointer to adapter instance
0905  *
0906  * free adapter structure and call various cleanup routines.
0907  */
0908 void bnx2i_free_hba(struct bnx2i_hba *hba)
0909 {
0910     struct Scsi_Host *shost = hba->shost;
0911
0912     iscsi_host_remove(shost, false);
0913     INIT_LIST_HEAD(&hba->ep_ofld_list);
0914     INIT_LIST_HEAD(&hba->ep_active_list);
0915     INIT_LIST_HEAD(&hba->ep_destroy_list);
0916
0917     if (hba->regview) {
0918         pci_iounmap(hba->pcidev, hba->regview);
0919         hba->regview = NULL;
0920     }
0921     pci_dev_put(hba->pcidev);
0922     bnx2i_free_mp_bdt(hba);
0923     bnx2i_release_free_cid_que(hba);
0924     iscsi_host_free(shost);
0925 }
0926
0927 /**
0928  * bnx2i_conn_free_login_resources - free DMA resources used for login process
0929  * @hba:        pointer to adapter instance
0930  * @bnx2i_conn:     iscsi connection pointer
0931  *
0932  * Login related resources, mostly BDT & payload DMA memory is freed
0933  */
0934 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
0935                         struct bnx2i_conn *bnx2i_conn)
0936 {
0937     if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
0938         dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
0939                   bnx2i_conn->gen_pdu.resp_bd_tbl,
0940                   bnx2i_conn->gen_pdu.resp_bd_dma);
0941         bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
0942     }
0943
0944     if (bnx2i_conn->gen_pdu.req_bd_tbl) {
0945         dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
0946                   bnx2i_conn->gen_pdu.req_bd_tbl,
0947                   bnx2i_conn->gen_pdu.req_bd_dma);
0948         bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
0949     }
0950
0951     if (bnx2i_conn->gen_pdu.resp_buf) {
0952         dma_free_coherent(&hba->pcidev->dev,
0953                   ISCSI_DEF_MAX_RECV_SEG_LEN,
0954                   bnx2i_conn->gen_pdu.resp_buf,
0955                   bnx2i_conn->gen_pdu.resp_dma_addr);
0956         bnx2i_conn->gen_pdu.resp_buf = NULL;
0957     }
0958
0959     if (bnx2i_conn->gen_pdu.req_buf) {
0960         dma_free_coherent(&hba->pcidev->dev,
0961                   ISCSI_DEF_MAX_RECV_SEG_LEN,
0962                   bnx2i_conn->gen_pdu.req_buf,
0963                   bnx2i_conn->gen_pdu.req_dma_addr);
0964         bnx2i_conn->gen_pdu.req_buf = NULL;
0965     }
0966 }
0967
0968 /**
0969  * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
0970  * @hba:        pointer to adapter instance
0971  * @bnx2i_conn:     iscsi connection pointer
0972  *
0973  * Mgmt task DNA resources are allocated in this routine.
0974  */
0975 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
0976                         struct bnx2i_conn *bnx2i_conn)
0977 {
0978     /* Allocate memory for login request/response buffers */
0979     bnx2i_conn->gen_pdu.req_buf =
0980         dma_alloc_coherent(&hba->pcidev->dev,
0981                    ISCSI_DEF_MAX_RECV_SEG_LEN,
0982                    &bnx2i_conn->gen_pdu.req_dma_addr,
0983                    GFP_KERNEL);
0984     if (bnx2i_conn->gen_pdu.req_buf == NULL)
0985         goto login_req_buf_failure;
0986
0987     bnx2i_conn->gen_pdu.req_buf_size = 0;
0988     bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
0989
0990     bnx2i_conn->gen_pdu.resp_buf =
0991         dma_alloc_coherent(&hba->pcidev->dev,
0992                    ISCSI_DEF_MAX_RECV_SEG_LEN,
0993                    &bnx2i_conn->gen_pdu.resp_dma_addr,
0994                    GFP_KERNEL);
0995     if (bnx2i_conn->gen_pdu.resp_buf == NULL)
0996         goto login_resp_buf_failure;
0997
0998     bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
0999     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
1016 login_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
1022 login_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;
1027 login_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;
1032 login_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 pointer
1043  *
1044  * Allocates buffers and BD tables before shipping requests to cnic
1045  *  for PDUs prepared by 'iscsid' daemon
1046  */
1047 static 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 pointer
1075  *
1076  * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1077  *  Nop-out and Logout requests flow through this path.
1078  */
1079 static 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         else
1099             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 Interface
1122  **********************************************************************/
1123
1124 /**
1125  * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1126  * @sc:     SCSI-ML command pointer
1127  * @cmd:    iscsi cmd pointer
1128  */
1129 static 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
1156 static 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 buffers
1169      */
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 processing
1183  * @conn:   transport layer conn structure pointer
1184  * @task:   transport layer command structure pointer
1185  */
1186 static int
1187 bnx2i_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 processing
1215  * @task:   transport layer command structure pointer
1216  *
1217  * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1218  */
1219 static 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 task
1236      */
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 session
1276  * @ep:     pointer to iscsi endpoint
1277  * @cmds_max:       user specified maximum commands
1278  * @qdepth:     scsi queue depth to support
1279  * @initial_cmdsn:  initial iscsi CMDSN to be used for this session
1280  *
1281  * Creates a new iSCSI session instance on given device.
1282  */
1283 static struct iscsi_cls_session *
1284 bnx2i_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 within
1306      * 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
1323 session_teardown:
1324     iscsi_session_teardown(cls_session);
1325     return NULL;
1326 }
1327
1328
1329 /**
1330  * bnx2i_session_destroy - destroys iscsi session
1331  * @cls_session:    pointer to iscsi cls session
1332  *
1333  * Destroys previously created iSCSI session instance and releases
1334  *  all resources held by it
1335  */
1336 static 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 instance
1349  * @cls_session:    pointer to iscsi cls session
1350  * @cid:        iscsi cid as per rfc (not NX2's CID terminology)
1351  *
1352  * Creates a new iSCSI connection instance for a given session
1353  */
1354 static struct iscsi_cls_conn *
1355 bnx2i_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
1387 free_conn:
1388     iscsi_conn_teardown(cls_conn);
1389     return NULL;
1390 }
1391
1392 /**
1393  * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1394  * @cls_session:    pointer to iscsi cls session
1395  * @cls_conn:       pointer to iscsi cls conn
1396  * @transport_fd:   64-bit EP handle
1397  * @is_leading:     leading connection on this session?
1398  *
1399  * Binds together iSCSI session instance, iSCSI connection instance
1400  *  and the TCP connection. This routine returns error code if
1401  *  TCP connection does not belong on the device iSCSI sess/conn
1402  *  is bound
1403  */
1404 static 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 the
1421      * 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 device
1443          */
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 57710
1462      * 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);
1468 put_ep:
1469     iscsi_put_endpoint(ep);
1470     return ret_code;
1471 }
1472
1473
1474 /**
1475  * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1476  * @cls_conn:   pointer to iscsi cls conn
1477  *
1478  * Destroy an iSCSI connection instance and release memory resources held by
1479  *  this connection
1480  */
1481 static 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 caller
1521  * @ep:     pointer to iscsi endpoint
1522  * @param:  parameter type identifier
1523  * @buf:    buffer pointer
1524  *
1525  * returns iSCSI ep parameters
1526  */
1527 static 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 parameters
1559  * @shost:  scsi host pointer
1560  * @param:  parameter type identifier
1561  * @buf:    buffer pointer
1562  */
1563 static 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             else
1591                 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 FFP
1604  * @cls_conn:   pointer to iscsi cls conn
1605  *
1606  * last call in FFP migration to handover iscsi conn to the driver
1607  */
1608 static 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 should
1618      * 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 stats
1638  * @cls_conn:   pointer to iscsi cls conn
1639  * @stats:  pointer to iscsi statistic struct
1640  */
1641 static 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 devices
1665  * @dst_addr:   target IP address
1666  *
1667  * check if route resolves to BNX2 device
1668  */
1669 static 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;
1699 no_nx2_route:
1700     return NULL;
1701 }
1702
1703
1704 /**
1705  * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1706  * @hba:    pointer to adapter instance
1707  * @ep:     endpoint (transport identifier) structure
1708  *
1709  * destroys cm_sock structure and on chip iscsi context
1710  */
1711 static 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 depending
1727          * on what transcribed in TCP layer, different targets behave
1728          * differently
1729          */
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 portal
1766  * @shost:      scsi host
1767  * @dst_addr:       target IP address
1768  * @non_blocking:   blocking or non-blocking call
1769  *
1770  * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1771  *  with l5_core and the CNIC. This is a multi-step process of resolving
1772  *  route to target, create a iscsi connection context, handshaking with
1773  *  CNIC module to create/initialize the socket struct and finally
1774  *  sending down option-2 request to complete TCP 3-way handshake
1775  */
1776 static 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     } else
1794         /*
1795          * check if the given destination can be reached through
1796          * a iscsi capable NetXtreme2 device
1797          */
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         } else
1851             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         } else
1874             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     } else
1907         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
1920 del_active_ep:
1921     bnx2i_ep_active_list_del(hba, bnx2i_ep);
1922 release_ep:
1923     if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1924         mutex_unlock(&hba->net_dev_lock);
1925         return ERR_PTR(rc);
1926     }
1927 conn_failed:
1928     bnx2i_free_qp_resc(hba, bnx2i_ep);
1929 qp_resc_err:
1930     bnx2i_free_ep(ep);
1931 check_busy:
1932     mutex_unlock(&hba->net_dev_lock);
1933 nohba:
1934     return ERR_PTR(rc);
1935 }
1936
1937
1938 /**
1939  * bnx2i_ep_poll - polls for TCP connection establishement
1940  * @ep:         TCP connection (endpoint) handle
1941  * @timeout_ms:     timeout value in milli secs
1942  *
1943  * polls for TCP connect request to complete
1944  */
1945 static 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     else
1974         return rc;
1975 }
1976
1977
1978 /**
1979  * bnx2i_ep_tcp_conn_active - check EP state transition
1980  * @bnx2i_ep:       endpoint pointer
1981  *
1982  * check if underlying TCP connection is active
1983  */
1984 static 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         else
2013             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 hw
2025  * @bnx2i_ep:       TCP connection (bnx2i endpoint) handle
2026  *
2027  * executes  TCP connection teardown process
2028  */
2029 int 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         } else
2080             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     else
2090         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     else
2096         /* 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
2105 destroy_conn:
2106     bnx2i_ep_active_list_del(hba, bnx2i_ep);
2107     if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2108         return -EINVAL;
2109 out:
2110     bnx2i_ep->state = EP_STATE_IDLE;
2111     return ret;
2112 }
2113
2114
2115 /**
2116  * bnx2i_ep_disconnect - executes TCP connection teardown process
2117  * @ep:     TCP connection (iscsi endpoint) handle
2118  *
2119  * executes  TCP connection teardown process
2120  */
2121 static 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_CONNECT
2130      * completes either successfully or fails. Timeout is 9-secs, so
2131      * wait for it to complete
2132      */
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     }
2160 free_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);
2167 out:
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 handler
2176  * @shost:  scsi host pointer
2177  * @params: pointer to buffer containing iscsi path message
2178  */
2179 static 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
2192 static 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 template
2251  * used while registering with the scsi host and iSCSI transport module.
2252  */
2253 static 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
2274 struct 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 };