drivers/scsi/bnx2i/bnx2i

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This source file includes following definitions.
bnx2i_adapter_ready
bnx2i_get_write_cmd_bd_idx
bnx2i_setup_write_cmd_bd_info
bnx2i_map_scsi_sg
bnx2i_iscsi_map_sg_list
bnx2i_iscsi_unmap_sg_list
bnx2i_setup_cmd_wqe_template
bnx2i_bind_conn_to_iscsi_cid
bnx2i_get_conn_from_id
bnx2i_alloc_iscsi_cid
bnx2i_free_iscsi_cid
bnx2i_setup_free_cid_que
bnx2i_release_free_cid_que
bnx2i_alloc_ep
bnx2i_free_ep
bnx2i_alloc_bdt
bnx2i_destroy_cmd_pool
bnx2i_setup_cmd_pool
bnx2i_setup_mp_bdt
bnx2i_free_mp_bdt
bnx2i_drop_session
bnx2i_ep_destroy_list_add
bnx2i_ep_destroy_list_del
bnx2i_ep_ofld_list_add
bnx2i_ep_ofld_list_del
bnx2i_find_ep_in_ofld_list
bnx2i_find_ep_in_destroy_list
bnx2i_ep_active_list_add
bnx2i_ep_active_list_del
bnx2i_setup_host_queue_size
bnx2i_alloc_hba
bnx2i_free_hba
bnx2i_conn_free_login_resources
bnx2i_conn_alloc_login_resources
bnx2i_iscsi_prep_generic_pdu_bd
bnx2i_iscsi_send_generic_request
bnx2i_cpy_scsi_cdb
bnx2i_cleanup_task
bnx2i_mtask_xmit
bnx2i_task_xmit
bnx2i_session_create
bnx2i_session_destroy
bnx2i_conn_create
bnx2i_conn_bind
bnx2i_conn_destroy
bnx2i_ep_get_param
bnx2i_host_get_param
bnx2i_conn_start
bnx2i_conn_get_stats
bnx2i_check_route
bnx2i_tear_down_conn
bnx2i_ep_connect
bnx2i_ep_poll
bnx2i_ep_tcp_conn_active
bnx2i_hw_ep_disconnect
bnx2i_ep_disconnect
bnx2i_nl_set_path
bnx2i_attr_is_visible
   1 /*
   2  * bnx2i_iscsi.c: QLogic NetXtreme II iSCSI driver.
   3  *
   4  * Copyright (c) 2006 - 2013 Broadcom Corporation
   5  * Copyright (c) 2007, 2008 Red Hat, Inc.  All rights reserved.
   6  * Copyright (c) 2007, 2008 Mike Christie
   7  * Copyright (c) 2014, QLogic Corporation
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * 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.com
  16  */
  17 
  18 #include <linux/slab.h>
  19 #include <scsi/scsi_tcq.h>
  20 #include <scsi/libiscsi.h>
  21 #include "bnx2i.h"
  22 
  23 struct scsi_transport_template *bnx2i_scsi_xport_template;
  24 struct iscsi_transport bnx2i_iscsi_transport;
  25 static struct scsi_host_template bnx2i_host_template;
  26 
  27 /*
  28  * Global endpoint resource info
  29  */
  30 static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
  31 
  32 DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
  33 
  34 static 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 bookmarks
  47  * @cmd:                iscsi cmd struct pointer
  48  * @buf_off:            absolute buffer offset
  49  * @start_bd_off:       u32 pointer to return the offset within the BD
  50  *                      indicated by 'start_bd_idx' on which 'buf_off' falls
  51  * @start_bd_idx:       index of the BD on which 'buf_off' falls
  52  *
  53  * identifies & marks various bd info for scsi command's imm data,
  54  * unsolicited data and the first solicited data seq.
  55  */
  56 static 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 information
  77  * @task:       transport layer's cmd struct pointer
  78  *
  79  * identifies & marks various bd info for scsi command's immediate data,
  80  * unsolicited data and first solicited data seq which includes BD start
  81  * index & BD buf off. his function takes into account iscsi parameter such
  82  * as immediate data and unsolicited data is support on this connection.
  83  */
  84 static 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 table
 138  * @hba:        adapter instance
 139  * @cmd:        iscsi cmd struct pointer
 140  *
 141  * map SG list
 142  */
 143 static 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 list
 182  * @cmd:        iscsi cmd struct pointer
 183  *
 184  * creates BD list table for the command
 185  */
 186 static 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 list
 203  * @cmd:        iscsi cmd struct pointer
 204  *
 205  * unmap IO buffers and invalidate the BD table
 206  */
 207 void 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 
 217 static 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 instance
 231  * @conn:       pointer to iscsi connection
 232  * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
 233  *
 234  * update iscsi cid table entry with connection pointer. This enables
 235  *      driver to quickly get hold of connection structure pointer in
 236  *      completion/interrupt thread using iscsi context ID
 237  */
 238 static 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 ptr
 255  * @hba:        pointer to adapter instance
 256  * @iscsi_cid:  iscsi context ID, range 0 - (MAX_CONN - 1)
 257  */
 258 struct 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 pool
 275  * @hba:        pointer to adapter instance
 276  */
 277 static 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 list
 296  * @hba:                pointer to adapter instance
 297  * @iscsi_cid:          iscsi context ID to free
 298  */
 299 static 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 queue
 319  * @hba:        pointer to adapter instance
 320  *
 321  * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
 322  *      and initialize table attributes
 323  */
 324 static 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 resources
 361  * @hba:        pointer to adapter instance
 362  */
 363 static 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 pool
 375  * @hba:        pointer to adapter instance
 376  *
 377  * routine allocates a free endpoint structure from global pool and
 378  *      a tcp port to be used for this connection.  Global resource lock,
 379  *      'bnx2i_resc_lock' is held while accessing shared global data structures
 380  */
 381 static 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 endpoint
 413  * @ep:         pointer to iscsi endpoint structure
 414  */
 415 static 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 command
 440  * @hba:        adapter instance pointer
 441  * @session:    iscsi session pointer
 442  * @cmd:        iscsi command structure
 443  */
 444 static 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 table
 464  * @hba:        adapter instance pointer
 465  * @session:    iscsi session pointer
 466  * @cmd:        iscsi command structure
 467  */
 468 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
 469                                    struct iscsi_session *session)
 470 {
 471         int i;
 472 
 473         for (i = 0; i < session->cmds_max; i++) {
 474                 struct iscsi_task *task = session->cmds[i];
 475                 struct bnx2i_cmd *cmd = task->dd_data;
 476 
 477                 if (cmd->io_tbl.bd_tbl)
 478                         dma_free_coherent(&hba->pcidev->dev,
 479                                           ISCSI_MAX_BDS_PER_CMD *
 480                                           sizeof(struct iscsi_bd),
 481                                           cmd->io_tbl.bd_tbl,
 482                                           cmd->io_tbl.bd_tbl_dma);
 483         }
 484 
 485 }
 486 
 487 
 488 /**
 489  * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
 490  * @hba:        adapter instance pointer
 491  * @session:    iscsi session pointer
 492  */
 493 static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
 494                                 struct iscsi_session *session)
 495 {
 496         int i;
 497 
 498         for (i = 0; i < session->cmds_max; i++) {
 499                 struct iscsi_task *task = session->cmds[i];
 500                 struct bnx2i_cmd *cmd = task->dd_data;
 501 
 502                 task->hdr = &cmd->hdr;
 503                 task->hdr_max = sizeof(struct iscsi_hdr);
 504 
 505                 if (bnx2i_alloc_bdt(hba, session, cmd))
 506                         goto free_bdts;
 507         }
 508 
 509         return 0;
 510 
 511 free_bdts:
 512         bnx2i_destroy_cmd_pool(hba, session);
 513         return -ENOMEM;
 514 }
 515 
 516 
 517 /**
 518  * bnx2i_setup_mp_bdt - allocate BD table resources
 519  * @hba:        pointer to adapter structure
 520  *
 521  * Allocate memory for dummy buffer and associated BD
 522  * table to be used by middle path (MP) requests
 523  */
 524 static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
 525 {
 526         int rc = 0;
 527         struct iscsi_bd *mp_bdt;
 528         u64 addr;
 529 
 530         hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 531                                             &hba->mp_bd_dma, GFP_KERNEL);
 532         if (!hba->mp_bd_tbl) {
 533                 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
 534                 rc = -1;
 535                 goto out;
 536         }
 537 
 538         hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev,
 539                                                CNIC_PAGE_SIZE,
 540                                                &hba->dummy_buf_dma, GFP_KERNEL);
 541         if (!hba->dummy_buffer) {
 542                 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
 543                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 544                                   hba->mp_bd_tbl, hba->mp_bd_dma);
 545                 hba->mp_bd_tbl = NULL;
 546                 rc = -1;
 547                 goto out;
 548         }
 549 
 550         mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
 551         addr = (unsigned long) hba->dummy_buf_dma;
 552         mp_bdt->buffer_addr_lo = addr & 0xffffffff;
 553         mp_bdt->buffer_addr_hi = addr >> 32;
 554         mp_bdt->buffer_length = CNIC_PAGE_SIZE;
 555         mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
 556                         ISCSI_BD_FIRST_IN_BD_CHAIN;
 557 out:
 558         return rc;
 559 }
 560 
 561 
 562 /**
 563  * bnx2i_free_mp_bdt - releases ITT back to free pool
 564  * @hba:        pointer to adapter instance
 565  *
 566  * free MP dummy buffer and associated BD table
 567  */
 568 static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
 569 {
 570         if (hba->mp_bd_tbl) {
 571                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 572                                   hba->mp_bd_tbl, hba->mp_bd_dma);
 573                 hba->mp_bd_tbl = NULL;
 574         }
 575         if (hba->dummy_buffer) {
 576                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 577                                   hba->dummy_buffer, hba->dummy_buf_dma);
 578                 hba->dummy_buffer = NULL;
 579         }
 580         return;
 581 }
 582 
 583 /**
 584  * bnx2i_drop_session - notifies iscsid of connection error.
 585  * @hba:        adapter instance pointer
 586  * @session:    iscsi session pointer
 587  *
 588  * This notifies iscsid that there is a error, so it can initiate
 589  * recovery.
 590  *
 591  * This relies on caller using the iscsi class iterator so the object
 592  * is refcounted and does not disapper from under us.
 593  */
 594 void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
 595 {
 596         iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
 597 }
 598 
 599 /**
 600  * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
 601  * @hba:        pointer to adapter instance
 602  * @ep:         pointer to endpoint (transport identifier) structure
 603  *
 604  * EP destroy queue manager
 605  */
 606 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
 607                                      struct bnx2i_endpoint *ep)
 608 {
 609         write_lock_bh(&hba->ep_rdwr_lock);
 610         list_add_tail(&ep->link, &hba->ep_destroy_list);
 611         write_unlock_bh(&hba->ep_rdwr_lock);
 612         return 0;
 613 }
 614 
 615 /**
 616  * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
 617  *
 618  * @hba:                pointer to adapter instance
 619  * @ep:                 pointer to endpoint (transport identifier) structure
 620  *
 621  * EP destroy queue manager
 622  */
 623 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
 624                                      struct bnx2i_endpoint *ep)
 625 {
 626         write_lock_bh(&hba->ep_rdwr_lock);
 627         list_del_init(&ep->link);
 628         write_unlock_bh(&hba->ep_rdwr_lock);
 629 
 630         return 0;
 631 }
 632 
 633 /**
 634  * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
 635  * @hba:        pointer to adapter instance
 636  * @ep:         pointer to endpoint (transport identifier) structure
 637  *
 638  * pending conn offload completion queue manager
 639  */
 640 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
 641                                   struct bnx2i_endpoint *ep)
 642 {
 643         write_lock_bh(&hba->ep_rdwr_lock);
 644         list_add_tail(&ep->link, &hba->ep_ofld_list);
 645         write_unlock_bh(&hba->ep_rdwr_lock);
 646         return 0;
 647 }
 648 
 649 /**
 650  * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
 651  * @hba:                pointer to adapter instance
 652  * @ep:                 pointer to endpoint (transport identifier) structure
 653  *
 654  * pending conn offload completion queue manager
 655  */
 656 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
 657                                   struct bnx2i_endpoint *ep)
 658 {
 659         write_lock_bh(&hba->ep_rdwr_lock);
 660         list_del_init(&ep->link);
 661         write_unlock_bh(&hba->ep_rdwr_lock);
 662         return 0;
 663 }
 664 
 665 
 666 /**
 667  * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
 668  *
 669  * @hba:                pointer to adapter instance
 670  * @iscsi_cid:          iscsi context ID to find
 671  *
 672  */
 673 struct bnx2i_endpoint *
 674 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
 675 {
 676         struct list_head *list;
 677         struct list_head *tmp;
 678         struct bnx2i_endpoint *ep = NULL;
 679 
 680         read_lock_bh(&hba->ep_rdwr_lock);
 681         list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
 682                 ep = (struct bnx2i_endpoint *)list;
 683 
 684                 if (ep->ep_iscsi_cid == iscsi_cid)
 685                         break;
 686                 ep = NULL;
 687         }
 688         read_unlock_bh(&hba->ep_rdwr_lock);
 689 
 690         if (!ep)
 691                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
 692         return ep;
 693 }
 694 
 695 /**
 696  * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
 697  * @hba:                pointer to adapter instance
 698  * @iscsi_cid:          iscsi context ID to find
 699  *
 700  */
 701 struct bnx2i_endpoint *
 702 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
 703 {
 704         struct list_head *list;
 705         struct list_head *tmp;
 706         struct bnx2i_endpoint *ep = NULL;
 707 
 708         read_lock_bh(&hba->ep_rdwr_lock);
 709         list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
 710                 ep = (struct bnx2i_endpoint *)list;
 711 
 712                 if (ep->ep_iscsi_cid == iscsi_cid)
 713                         break;
 714                 ep = NULL;
 715         }
 716         read_unlock_bh(&hba->ep_rdwr_lock);
 717 
 718         if (!ep)
 719                 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
 720 
 721         return ep;
 722 }
 723 
 724 /**
 725  * bnx2i_ep_active_list_add - add an entry to ep active list
 726  * @hba:        pointer to adapter instance
 727  * @ep:         pointer to endpoint (transport identifier) structure
 728  *
 729  * current active conn queue manager
 730  */
 731 static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
 732                                      struct bnx2i_endpoint *ep)
 733 {
 734         write_lock_bh(&hba->ep_rdwr_lock);
 735         list_add_tail(&ep->link, &hba->ep_active_list);
 736         write_unlock_bh(&hba->ep_rdwr_lock);
 737 }
 738 
 739 
 740 /**
 741  * bnx2i_ep_active_list_del - deletes an entry to ep active list
 742  * @hba:        pointer to adapter instance
 743  * @ep:         pointer to endpoint (transport identifier) structure
 744  *
 745  * current active conn queue manager
 746  */
 747 static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,
 748                                      struct bnx2i_endpoint *ep)
 749 {
 750         write_lock_bh(&hba->ep_rdwr_lock);
 751         list_del_init(&ep->link);
 752         write_unlock_bh(&hba->ep_rdwr_lock);
 753 }
 754 
 755 
 756 /**
 757  * bnx2i_setup_host_queue_size - assigns shost->can_queue param
 758  * @hba:        pointer to adapter instance
 759  * @shost:      scsi host pointer
 760  *
 761  * Initializes 'can_queue' parameter based on how many outstanding commands
 762  *      the device can handle. Each device 5708/5709/57710 has different
 763  *      capabilities
 764  */
 765 static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
 766                                         struct Scsi_Host *shost)
 767 {
 768         if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
 769                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
 770         else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
 771                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
 772         else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
 773                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
 774         else
 775                 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
 776 }
 777 
 778 
 779 /**
 780  * bnx2i_alloc_hba - allocate and init adapter instance
 781  * @cnic:       cnic device pointer
 782  *
 783  * allocate & initialize adapter structure and call other
 784  *      support routines to do per adapter initialization
 785  */
 786 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
 787 {
 788         struct Scsi_Host *shost;
 789         struct bnx2i_hba *hba;
 790 
 791         shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
 792         if (!shost)
 793                 return NULL;
 794         shost->dma_boundary = cnic->pcidev->dma_mask;
 795         shost->transportt = bnx2i_scsi_xport_template;
 796         shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
 797         shost->max_channel = 0;
 798         shost->max_lun = 512;
 799         shost->max_cmd_len = 16;
 800 
 801         hba = iscsi_host_priv(shost);
 802         hba->shost = shost;
 803         hba->netdev = cnic->netdev;
 804         /* Get PCI related information and update hba struct members */
 805         hba->pcidev = cnic->pcidev;
 806         pci_dev_get(hba->pcidev);
 807         hba->pci_did = hba->pcidev->device;
 808         hba->pci_vid = hba->pcidev->vendor;
 809         hba->pci_sdid = hba->pcidev->subsystem_device;
 810         hba->pci_svid = hba->pcidev->subsystem_vendor;
 811         hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
 812         hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
 813 
 814         bnx2i_identify_device(hba, cnic);
 815         bnx2i_setup_host_queue_size(hba, shost);
 816 
 817         hba->reg_base = pci_resource_start(hba->pcidev, 0);
 818         if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
 819                 hba->regview = pci_iomap(hba->pcidev, 0, BNX2_MQ_CONFIG2);
 820                 if (!hba->regview)
 821                         goto ioreg_map_err;
 822         } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 823                 hba->regview = pci_iomap(hba->pcidev, 0, 4096);
 824                 if (!hba->regview)
 825                         goto ioreg_map_err;
 826         }
 827 
 828         if (bnx2i_setup_mp_bdt(hba))
 829                 goto mp_bdt_mem_err;
 830 
 831         INIT_LIST_HEAD(&hba->ep_ofld_list);
 832         INIT_LIST_HEAD(&hba->ep_active_list);
 833         INIT_LIST_HEAD(&hba->ep_destroy_list);
 834         rwlock_init(&hba->ep_rdwr_lock);
 835 
 836         hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
 837 
 838         /* different values for 5708/5709/57710 */
 839         hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
 840 
 841         if (bnx2i_setup_free_cid_que(hba))
 842                 goto cid_que_err;
 843 
 844         /* SQ/RQ/CQ size can be changed via sysfx interface */
 845         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 846                 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
 847                         hba->max_sqes = sq_size;
 848                 else
 849                         hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
 850         } else {        /* 5706/5708/5709 */
 851                 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
 852                         hba->max_sqes = sq_size;
 853                 else
 854                         hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
 855         }
 856 
 857         hba->max_rqes = rq_size;
 858         hba->max_cqes = hba->max_sqes + rq_size;
 859         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 860                 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
 861                         hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
 862         } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
 863                 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
 864 
 865         hba->num_ccell = hba->max_sqes / 2;
 866 
 867         spin_lock_init(&hba->lock);
 868         mutex_init(&hba->net_dev_lock);
 869         init_waitqueue_head(&hba->eh_wait);
 870         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
 871                 hba->hba_shutdown_tmo = 30 * HZ;
 872                 hba->conn_teardown_tmo = 20 * HZ;
 873                 hba->conn_ctx_destroy_tmo = 6 * HZ;
 874         } else {        /* 5706/5708/5709 */
 875                 hba->hba_shutdown_tmo = 20 * HZ;
 876                 hba->conn_teardown_tmo = 10 * HZ;
 877                 hba->conn_ctx_destroy_tmo = 2 * HZ;
 878         }
 879 
 880 #ifdef CONFIG_32BIT
 881         spin_lock_init(&hba->stat_lock);
 882 #endif
 883         memset(&hba->stats, 0, sizeof(struct iscsi_stats_info));
 884 
 885         if (iscsi_host_add(shost, &hba->pcidev->dev))
 886                 goto free_dump_mem;
 887         return hba;
 888 
 889 free_dump_mem:
 890         bnx2i_release_free_cid_que(hba);
 891 cid_que_err:
 892         bnx2i_free_mp_bdt(hba);
 893 mp_bdt_mem_err:
 894         if (hba->regview) {
 895                 pci_iounmap(hba->pcidev, hba->regview);
 896                 hba->regview = NULL;
 897         }
 898 ioreg_map_err:
 899         pci_dev_put(hba->pcidev);
 900         scsi_host_put(shost);
 901         return NULL;
 902 }
 903 
 904 /**
 905  * bnx2i_free_hba- releases hba structure and resources held by the adapter
 906  * @hba:        pointer to adapter instance
 907  *
 908  * free adapter structure and call various cleanup routines.
 909  */
 910 void bnx2i_free_hba(struct bnx2i_hba *hba)
 911 {
 912         struct Scsi_Host *shost = hba->shost;
 913 
 914         iscsi_host_remove(shost);
 915         INIT_LIST_HEAD(&hba->ep_ofld_list);
 916         INIT_LIST_HEAD(&hba->ep_active_list);
 917         INIT_LIST_HEAD(&hba->ep_destroy_list);
 918 
 919         if (hba->regview) {
 920                 pci_iounmap(hba->pcidev, hba->regview);
 921                 hba->regview = NULL;
 922         }
 923         pci_dev_put(hba->pcidev);
 924         bnx2i_free_mp_bdt(hba);
 925         bnx2i_release_free_cid_que(hba);
 926         iscsi_host_free(shost);
 927 }
 928 
 929 /**
 930  * bnx2i_conn_free_login_resources - free DMA resources used for login process
 931  * @hba:                pointer to adapter instance
 932  * @bnx2i_conn:         iscsi connection pointer
 933  *
 934  * Login related resources, mostly BDT & payload DMA memory is freed
 935  */
 936 static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
 937                                             struct bnx2i_conn *bnx2i_conn)
 938 {
 939         if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
 940                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 941                                   bnx2i_conn->gen_pdu.resp_bd_tbl,
 942                                   bnx2i_conn->gen_pdu.resp_bd_dma);
 943                 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
 944         }
 945 
 946         if (bnx2i_conn->gen_pdu.req_bd_tbl) {
 947                 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
 948                                   bnx2i_conn->gen_pdu.req_bd_tbl,
 949                                   bnx2i_conn->gen_pdu.req_bd_dma);
 950                 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
 951         }
 952 
 953         if (bnx2i_conn->gen_pdu.resp_buf) {
 954                 dma_free_coherent(&hba->pcidev->dev,
 955                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
 956                                   bnx2i_conn->gen_pdu.resp_buf,
 957                                   bnx2i_conn->gen_pdu.resp_dma_addr);
 958                 bnx2i_conn->gen_pdu.resp_buf = NULL;
 959         }
 960 
 961         if (bnx2i_conn->gen_pdu.req_buf) {
 962                 dma_free_coherent(&hba->pcidev->dev,
 963                                   ISCSI_DEF_MAX_RECV_SEG_LEN,
 964                                   bnx2i_conn->gen_pdu.req_buf,
 965                                   bnx2i_conn->gen_pdu.req_dma_addr);
 966                 bnx2i_conn->gen_pdu.req_buf = NULL;
 967         }
 968 }
 969 
 970 /**
 971  * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
 972  * @hba:                pointer to adapter instance
 973  * @bnx2i_conn:         iscsi connection pointer
 974  *
 975  * Mgmt task DNA resources are allocated in this routine.
 976  */
 977 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
 978                                             struct bnx2i_conn *bnx2i_conn)
 979 {
 980         /* Allocate memory for login request/response buffers */
 981         bnx2i_conn->gen_pdu.req_buf =
 982                 dma_alloc_coherent(&hba->pcidev->dev,
 983                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
 984                                    &bnx2i_conn->gen_pdu.req_dma_addr,
 985                                    GFP_KERNEL);
 986         if (bnx2i_conn->gen_pdu.req_buf == NULL)
 987                 goto login_req_buf_failure;
 988 
 989         bnx2i_conn->gen_pdu.req_buf_size = 0;
 990         bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
 991 
 992         bnx2i_conn->gen_pdu.resp_buf =
 993                 dma_alloc_coherent(&hba->pcidev->dev,
 994                                    ISCSI_DEF_MAX_RECV_SEG_LEN,
 995                                    &bnx2i_conn->gen_pdu.resp_dma_addr,
 996                                    GFP_KERNEL);
 997         if (bnx2i_conn->gen_pdu.resp_buf == NULL)
 998                 goto login_resp_buf_failure;
 999 
1000         bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
1001         bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
1002 
1003         bnx2i_conn->gen_pdu.req_bd_tbl =
1004                 dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
1005                                    &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
1006         if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
1007                 goto login_req_bd_tbl_failure;
1008 
1009         bnx2i_conn->gen_pdu.resp_bd_tbl =
1010                 dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
1011                                    &bnx2i_conn->gen_pdu.resp_bd_dma,
1012                                    GFP_KERNEL);
1013         if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
1014                 goto login_resp_bd_tbl_failure;
1015 
1016         return 0;
1017 
1018 login_resp_bd_tbl_failure:
1019         dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
1020                           bnx2i_conn->gen_pdu.req_bd_tbl,
1021                           bnx2i_conn->gen_pdu.req_bd_dma);
1022         bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
1023 
1024 login_req_bd_tbl_failure:
1025         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1026                           bnx2i_conn->gen_pdu.resp_buf,
1027                           bnx2i_conn->gen_pdu.resp_dma_addr);
1028         bnx2i_conn->gen_pdu.resp_buf = NULL;
1029 login_resp_buf_failure:
1030         dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1031                           bnx2i_conn->gen_pdu.req_buf,
1032                           bnx2i_conn->gen_pdu.req_dma_addr);
1033         bnx2i_conn->gen_pdu.req_buf = NULL;
1034 login_req_buf_failure:
1035         iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
1036                           "login resource alloc failed!!\n");
1037         return -ENOMEM;
1038 
1039 }
1040 
1041 
1042 /**
1043  * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1044  * @bnx2i_conn:         iscsi connection pointer
1045  *
1046  * Allocates buffers and BD tables before shipping requests to cnic
1047  *      for PDUs prepared by 'iscsid' daemon
1048  */
1049 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
1050 {
1051         struct iscsi_bd *bd_tbl;
1052 
1053         bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
1054 
1055         bd_tbl->buffer_addr_hi =
1056                 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
1057         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
1058         bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
1059                                 bnx2i_conn->gen_pdu.req_buf;
1060         bd_tbl->reserved0 = 0;
1061         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1062                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1063 
1064         bd_tbl = (struct iscsi_bd  *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1065         bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1066         bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1067         bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1068         bd_tbl->reserved0 = 0;
1069         bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1070                         ISCSI_BD_FIRST_IN_BD_CHAIN;
1071 }
1072 
1073 
1074 /**
1075  * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1076  * @task:       transport layer task pointer
1077  *
1078  * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1079  *      Nop-out and Logout requests flow through this path.
1080  */
1081 static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1082 {
1083         struct bnx2i_cmd *cmd = task->dd_data;
1084         struct bnx2i_conn *bnx2i_conn = cmd->conn;
1085         int rc = 0;
1086         char *buf;
1087         int data_len;
1088 
1089         bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1090         switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1091         case ISCSI_OP_LOGIN:
1092                 bnx2i_send_iscsi_login(bnx2i_conn, task);
1093                 break;
1094         case ISCSI_OP_NOOP_OUT:
1095                 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1096                 buf = bnx2i_conn->gen_pdu.req_buf;
1097                 if (data_len)
1098                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1099                                                      buf, data_len, 1);
1100                 else
1101                         rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
1102                                                      NULL, 0, 1);
1103                 break;
1104         case ISCSI_OP_LOGOUT:
1105                 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1106                 break;
1107         case ISCSI_OP_SCSI_TMFUNC:
1108                 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1109                 break;
1110         case ISCSI_OP_TEXT:
1111                 rc = bnx2i_send_iscsi_text(bnx2i_conn, task);
1112                 break;
1113         default:
1114                 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1115                                   "send_gen: unsupported op 0x%x\n",
1116                                   task->hdr->opcode);
1117         }
1118         return rc;
1119 }
1120 
1121 
1122 /**********************************************************************
1123  *              SCSI-ML Interface
1124  **********************************************************************/
1125 
1126 /**
1127  * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1128  * @sc:         SCSI-ML command pointer
1129  * @cmd:        iscsi cmd pointer
1130  */
1131 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1132 {
1133         u32 dword;
1134         int lpcnt;
1135         u8 *srcp;
1136         u32 *dstp;
1137         u32 scsi_lun[2];
1138 
1139         int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1140         cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1141         cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1142 
1143         lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1144         srcp = (u8 *) sc->cmnd;
1145         dstp = (u32 *) cmd->req.cdb;
1146         while (lpcnt--) {
1147                 memcpy(&dword, (const void *) srcp, 4);
1148                 *dstp = cpu_to_be32(dword);
1149                 srcp += 4;
1150                 dstp++;
1151         }
1152         if (sc->cmd_len & 0x3) {
1153                 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1154                 *dstp = cpu_to_be32(dword);
1155         }
1156 }
1157 
1158 static void bnx2i_cleanup_task(struct iscsi_task *task)
1159 {
1160         struct iscsi_conn *conn = task->conn;
1161         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1162         struct bnx2i_hba *hba = bnx2i_conn->hba;
1163 
1164         /*
1165          * mgmt task or cmd was never sent to us to transmit.
1166          */
1167         if (!task->sc || task->state == ISCSI_TASK_PENDING)
1168                 return;
1169         /*
1170          * need to clean-up task context to claim dma buffers
1171          */
1172         if (task->state == ISCSI_TASK_ABRT_TMF) {
1173                 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1174 
1175                 spin_unlock_bh(&conn->session->back_lock);
1176                 spin_unlock_bh(&conn->session->frwd_lock);
1177                 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1178                                 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1179                 spin_lock_bh(&conn->session->frwd_lock);
1180                 spin_lock_bh(&conn->session->back_lock);
1181         }
1182         bnx2i_iscsi_unmap_sg_list(task->dd_data);
1183 }
1184 
1185 /**
1186  * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1187  * @conn:       transport layer conn structure pointer
1188  * @task:       transport layer command structure pointer
1189  */
1190 static int
1191 bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1192 {
1193         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1194         struct bnx2i_hba *hba = bnx2i_conn->hba;
1195         struct bnx2i_cmd *cmd = task->dd_data;
1196 
1197         memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1198 
1199         bnx2i_setup_cmd_wqe_template(cmd);
1200         bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1201 
1202         /* Tx PDU/data length count */
1203         ADD_STATS_64(hba, tx_pdus, 1);
1204         ADD_STATS_64(hba, tx_bytes, task->data_count);
1205 
1206         if (task->data_count) {
1207                 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1208                        task->data_count);
1209                 bnx2i_conn->gen_pdu.req_wr_ptr =
1210                         bnx2i_conn->gen_pdu.req_buf + task->data_count;
1211         }
1212         cmd->conn = conn->dd_data;
1213         cmd->scsi_cmd = NULL;
1214         return bnx2i_iscsi_send_generic_request(task);
1215 }
1216 
1217 /**
1218  * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1219  * @task:       transport layer command structure pointer
1220  *
1221  * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1222  */
1223 static int bnx2i_task_xmit(struct iscsi_task *task)
1224 {
1225         struct iscsi_conn *conn = task->conn;
1226         struct iscsi_session *session = conn->session;
1227         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1228         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1229         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1230         struct scsi_cmnd *sc = task->sc;
1231         struct bnx2i_cmd *cmd = task->dd_data;
1232         struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
1233 
1234         if (atomic_read(&bnx2i_conn->ep->num_active_cmds) + 1  >
1235             hba->max_sqes)
1236                 return -ENOMEM;
1237 
1238         /*
1239          * If there is no scsi_cmnd this must be a mgmt task
1240          */
1241         if (!sc)
1242                 return bnx2i_mtask_xmit(conn, task);
1243 
1244         bnx2i_setup_cmd_wqe_template(cmd);
1245         cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1246         cmd->conn = bnx2i_conn;
1247         cmd->scsi_cmd = sc;
1248         cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1249         cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1250 
1251         bnx2i_iscsi_map_sg_list(cmd);
1252         bnx2i_cpy_scsi_cdb(sc, cmd);
1253 
1254         cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1255         if (sc->sc_data_direction == DMA_TO_DEVICE) {
1256                 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1257                 cmd->req.itt = task->itt |
1258                         (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1259                 bnx2i_setup_write_cmd_bd_info(task);
1260         } else {
1261                 if (scsi_bufflen(sc))
1262                         cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1263                 cmd->req.itt = task->itt |
1264                         (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1265         }
1266 
1267         cmd->req.num_bds = cmd->io_tbl.bd_valid;
1268         if (!cmd->io_tbl.bd_valid) {
1269                 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1270                 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1271                 cmd->req.num_bds = 1;
1272         }
1273 
1274         bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1275         return 0;
1276 }
1277 
1278 /**
1279  * bnx2i_session_create - create a new iscsi session
1280  * @cmds_max:           max commands supported
1281  * @qdepth:             scsi queue depth to support
1282  * @initial_cmdsn:      initial iscsi CMDSN to be used for this session
1283  *
1284  * Creates a new iSCSI session instance on given device.
1285  */
1286 static struct iscsi_cls_session *
1287 bnx2i_session_create(struct iscsi_endpoint *ep,
1288                      uint16_t cmds_max, uint16_t qdepth,
1289                      uint32_t initial_cmdsn)
1290 {
1291         struct Scsi_Host *shost;
1292         struct iscsi_cls_session *cls_session;
1293         struct bnx2i_hba *hba;
1294         struct bnx2i_endpoint *bnx2i_ep;
1295 
1296         if (!ep) {
1297                 printk(KERN_ERR "bnx2i: missing ep.\n");
1298                 return NULL;
1299         }
1300 
1301         bnx2i_ep = ep->dd_data;
1302         shost = bnx2i_ep->hba->shost;
1303         hba = iscsi_host_priv(shost);
1304         if (bnx2i_adapter_ready(hba))
1305                 return NULL;
1306 
1307         /*
1308          * user can override hw limit as long as it is within
1309          * the min/max.
1310          */
1311         if (cmds_max > hba->max_sqes)
1312                 cmds_max = hba->max_sqes;
1313         else if (cmds_max < BNX2I_SQ_WQES_MIN)
1314                 cmds_max = BNX2I_SQ_WQES_MIN;
1315 
1316         cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
1317                                           cmds_max, 0, sizeof(struct bnx2i_cmd),
1318                                           initial_cmdsn, ISCSI_MAX_TARGET);
1319         if (!cls_session)
1320                 return NULL;
1321 
1322         if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1323                 goto session_teardown;
1324         return cls_session;
1325 
1326 session_teardown:
1327         iscsi_session_teardown(cls_session);
1328         return NULL;
1329 }
1330 
1331 
1332 /**
1333  * bnx2i_session_destroy - destroys iscsi session
1334  * @cls_session:        pointer to iscsi cls session
1335  *
1336  * Destroys previously created iSCSI session instance and releases
1337  *      all resources held by it
1338  */
1339 static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1340 {
1341         struct iscsi_session *session = cls_session->dd_data;
1342         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1343         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1344 
1345         bnx2i_destroy_cmd_pool(hba, session);
1346         iscsi_session_teardown(cls_session);
1347 }
1348 
1349 
1350 /**
1351  * bnx2i_conn_create - create iscsi connection instance
1352  * @cls_session:        pointer to iscsi cls session
1353  * @cid:                iscsi cid as per rfc (not NX2's CID terminology)
1354  *
1355  * Creates a new iSCSI connection instance for a given session
1356  */
1357 static struct iscsi_cls_conn *
1358 bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1359 {
1360         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1361         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1362         struct bnx2i_conn *bnx2i_conn;
1363         struct iscsi_cls_conn *cls_conn;
1364         struct iscsi_conn *conn;
1365 
1366         cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1367                                     cid);
1368         if (!cls_conn)
1369                 return NULL;
1370         conn = cls_conn->dd_data;
1371 
1372         bnx2i_conn = conn->dd_data;
1373         bnx2i_conn->cls_conn = cls_conn;
1374         bnx2i_conn->hba = hba;
1375 
1376         atomic_set(&bnx2i_conn->work_cnt, 0);
1377 
1378         /* 'ep' ptr will be assigned in bind() call */
1379         bnx2i_conn->ep = NULL;
1380         init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1381 
1382         if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1383                 iscsi_conn_printk(KERN_ALERT, conn,
1384                                   "conn_new: login resc alloc failed!!\n");
1385                 goto free_conn;
1386         }
1387 
1388         return cls_conn;
1389 
1390 free_conn:
1391         iscsi_conn_teardown(cls_conn);
1392         return NULL;
1393 }
1394 
1395 /**
1396  * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1397  * @cls_session:        pointer to iscsi cls session
1398  * @cls_conn:           pointer to iscsi cls conn
1399  * @transport_fd:       64-bit EP handle
1400  * @is_leading:         leading connection on this session?
1401  *
1402  * Binds together iSCSI session instance, iSCSI connection instance
1403  *      and the TCP connection. This routine returns error code if
1404  *      TCP connection does not belong on the device iSCSI sess/conn
1405  *      is bound
1406  */
1407 static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1408                            struct iscsi_cls_conn *cls_conn,
1409                            uint64_t transport_fd, int is_leading)
1410 {
1411         struct iscsi_conn *conn = cls_conn->dd_data;
1412         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1413         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1414         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1415         struct bnx2i_endpoint *bnx2i_ep;
1416         struct iscsi_endpoint *ep;
1417         int ret_code;
1418 
1419         ep = iscsi_lookup_endpoint(transport_fd);
1420         if (!ep)
1421                 return -EINVAL;
1422         /*
1423          * Forcefully terminate all in progress connection recovery at the
1424          * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1425          */
1426         if (bnx2i_adapter_ready(hba))
1427                 return -EIO;
1428 
1429         bnx2i_ep = ep->dd_data;
1430         if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1431             (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1432                 /* Peer disconnect via' FIN or RST */
1433                 return -EINVAL;
1434 
1435         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1436                 return -EINVAL;
1437 
1438         if (bnx2i_ep->hba != hba) {
1439                 /* Error - TCP connection does not belong to this device
1440                  */
1441                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1442                                   "conn bind, ep=0x%p (%s) does not",
1443                                   bnx2i_ep, bnx2i_ep->hba->netdev->name);
1444                 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1445                                   "belong to hba (%s)\n",
1446                                   hba->netdev->name);
1447                 return -EEXIST;
1448         }
1449         bnx2i_ep->conn = bnx2i_conn;
1450         bnx2i_conn->ep = bnx2i_ep;
1451         bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1452         bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
1453 
1454         ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1455                                                 bnx2i_ep->ep_iscsi_cid);
1456 
1457         /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1458          * driver needs to explicitly replenish RQ index during setup.
1459          */
1460         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1461                 bnx2i_put_rq_buf(bnx2i_conn, 0);
1462 
1463         bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1464         return ret_code;
1465 }
1466 
1467 
1468 /**
1469  * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1470  * @cls_conn:   pointer to iscsi cls conn
1471  *
1472  * Destroy an iSCSI connection instance and release memory resources held by
1473  *      this connection
1474  */
1475 static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1476 {
1477         struct iscsi_conn *conn = cls_conn->dd_data;
1478         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1479         struct Scsi_Host *shost;
1480         struct bnx2i_hba *hba;
1481         struct bnx2i_work *work, *tmp;
1482         unsigned cpu = 0;
1483         struct bnx2i_percpu_s *p;
1484 
1485         shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1486         hba = iscsi_host_priv(shost);
1487 
1488         bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1489 
1490         if (atomic_read(&bnx2i_conn->work_cnt)) {
1491                 for_each_online_cpu(cpu) {
1492                         p = &per_cpu(bnx2i_percpu, cpu);
1493                         spin_lock_bh(&p->p_work_lock);
1494                         list_for_each_entry_safe(work, tmp,
1495                                                  &p->work_list, list) {
1496                                 if (work->session == conn->session &&
1497                                     work->bnx2i_conn == bnx2i_conn) {
1498                                         list_del_init(&work->list);
1499                                         kfree(work);
1500                                         if (!atomic_dec_and_test(
1501                                                         &bnx2i_conn->work_cnt))
1502                                                 break;
1503                                 }
1504                         }
1505                         spin_unlock_bh(&p->p_work_lock);
1506                 }
1507         }
1508 
1509         iscsi_conn_teardown(cls_conn);
1510 }
1511 
1512 
1513 /**
1514  * bnx2i_ep_get_param - return iscsi ep parameter to caller
1515  * @ep:         pointer to iscsi endpoint
1516  * @param:      parameter type identifier
1517  * @buf:        buffer pointer
1518  *
1519  * returns iSCSI ep parameters
1520  */
1521 static int bnx2i_ep_get_param(struct iscsi_endpoint *ep,
1522                               enum iscsi_param param, char *buf)
1523 {
1524         struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
1525         struct bnx2i_hba *hba = bnx2i_ep->hba;
1526         int len = -ENOTCONN;
1527 
1528         if (!hba)
1529                 return -ENOTCONN;
1530 
1531         switch (param) {
1532         case ISCSI_PARAM_CONN_PORT:
1533                 mutex_lock(&hba->net_dev_lock);
1534                 if (bnx2i_ep->cm_sk)
1535                         len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port);
1536                 mutex_unlock(&hba->net_dev_lock);
1537                 break;
1538         case ISCSI_PARAM_CONN_ADDRESS:
1539                 mutex_lock(&hba->net_dev_lock);
1540                 if (bnx2i_ep->cm_sk)
1541                         len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip);
1542                 mutex_unlock(&hba->net_dev_lock);
1543                 break;
1544         default:
1545                 return -ENOSYS;
1546         }
1547 
1548         return len;
1549 }
1550 
1551 /**
1552  * bnx2i_host_get_param - returns host (adapter) related parameters
1553  * @shost:      scsi host pointer
1554  * @param:      parameter type identifier
1555  * @buf:        buffer pointer
1556  */
1557 static int bnx2i_host_get_param(struct Scsi_Host *shost,
1558                                 enum iscsi_host_param param, char *buf)
1559 {
1560         struct bnx2i_hba *hba = iscsi_host_priv(shost);
1561         int len = 0;
1562 
1563         switch (param) {
1564         case ISCSI_HOST_PARAM_HWADDRESS:
1565                 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1566                 break;
1567         case ISCSI_HOST_PARAM_NETDEV_NAME:
1568                 len = sprintf(buf, "%s\n", hba->netdev->name);
1569                 break;
1570         case ISCSI_HOST_PARAM_IPADDRESS: {
1571                 struct list_head *active_list = &hba->ep_active_list;
1572 
1573                 read_lock_bh(&hba->ep_rdwr_lock);
1574                 if (!list_empty(&hba->ep_active_list)) {
1575                         struct bnx2i_endpoint *bnx2i_ep;
1576                         struct cnic_sock *csk;
1577 
1578                         bnx2i_ep = list_first_entry(active_list,
1579                                                     struct bnx2i_endpoint,
1580                                                     link);
1581                         csk = bnx2i_ep->cm_sk;
1582                         if (test_bit(SK_F_IPV6, &csk->flags))
1583                                 len = sprintf(buf, "%pI6\n", csk->src_ip);
1584                         else
1585                                 len = sprintf(buf, "%pI4\n", csk->src_ip);
1586                 }
1587                 read_unlock_bh(&hba->ep_rdwr_lock);
1588                 break;
1589         }
1590         default:
1591                 return iscsi_host_get_param(shost, param, buf);
1592         }
1593         return len;
1594 }
1595 
1596 /**
1597  * bnx2i_conn_start - completes iscsi connection migration to FFP
1598  * @cls_conn:   pointer to iscsi cls conn
1599  *
1600  * last call in FFP migration to handover iscsi conn to the driver
1601  */
1602 static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1603 {
1604         struct iscsi_conn *conn = cls_conn->dd_data;
1605         struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1606 
1607         bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1608         bnx2i_update_iscsi_conn(conn);
1609 
1610         /*
1611          * this should normally not sleep for a long time so it should
1612          * not disrupt the caller.
1613          */
1614         timer_setup(&bnx2i_conn->ep->ofld_timer, bnx2i_ep_ofld_timer, 0);
1615         bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1616         add_timer(&bnx2i_conn->ep->ofld_timer);
1617         /* update iSCSI context for this conn, wait for CNIC to complete */
1618         wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1619                         bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1620 
1621         if (signal_pending(current))
1622                 flush_signals(current);
1623         del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1624 
1625         iscsi_conn_start(cls_conn);
1626         return 0;
1627 }
1628 
1629 
1630 /**
1631  * bnx2i_conn_get_stats - returns iSCSI stats
1632  * @cls_conn:   pointer to iscsi cls conn
1633  * @stats:      pointer to iscsi statistic struct
1634  */
1635 static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1636                                  struct iscsi_stats *stats)
1637 {
1638         struct iscsi_conn *conn = cls_conn->dd_data;
1639 
1640         stats->txdata_octets = conn->txdata_octets;
1641         stats->rxdata_octets = conn->rxdata_octets;
1642         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1643         stats->dataout_pdus = conn->dataout_pdus_cnt;
1644         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1645         stats->datain_pdus = conn->datain_pdus_cnt;
1646         stats->r2t_pdus = conn->r2t_pdus_cnt;
1647         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1648         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1649         stats->digest_err = 0;
1650         stats->timeout_err = 0;
1651         strcpy(stats->custom[0].desc, "eh_abort_cnt");
1652         stats->custom[0].value = conn->eh_abort_cnt;
1653         stats->custom_length = 1;
1654 }
1655 
1656 
1657 /**
1658  * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1659  * @dst_addr:   target IP address
1660  *
1661  * check if route resolves to BNX2 device
1662  */
1663 static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1664 {
1665         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1666         struct bnx2i_hba *hba;
1667         struct cnic_dev *cnic = NULL;
1668 
1669         hba = get_adapter_list_head();
1670         if (hba && hba->cnic)
1671                 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1672         if (!cnic) {
1673                 printk(KERN_ALERT "bnx2i: no route,"
1674                        "can't connect using cnic\n");
1675                 goto no_nx2_route;
1676         }
1677         hba = bnx2i_find_hba_for_cnic(cnic);
1678         if (!hba)
1679                 goto no_nx2_route;
1680 
1681         if (bnx2i_adapter_ready(hba)) {
1682                 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1683                 goto no_nx2_route;
1684         }
1685         if (hba->netdev->mtu > hba->mtu_supported) {
1686                 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1687                                   hba->netdev->name, hba->netdev->mtu);
1688                 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1689                                   hba->mtu_supported);
1690                 goto no_nx2_route;
1691         }
1692         return hba;
1693 no_nx2_route:
1694         return NULL;
1695 }
1696 
1697 
1698 /**
1699  * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1700  * @hba:        pointer to adapter instance
1701  * @ep:         endpoint (transport identifier) structure
1702  *
1703  * destroys cm_sock structure and on chip iscsi context
1704  */
1705 static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1706                                  struct bnx2i_endpoint *ep)
1707 {
1708         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
1709                 hba->cnic->cm_destroy(ep->cm_sk);
1710 
1711         if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1712             ep->state == EP_STATE_DISCONN_TIMEDOUT) {
1713                 if (ep->conn && ep->conn->cls_conn &&
1714                     ep->conn->cls_conn->dd_data) {
1715                         struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
1716 
1717                         /* Must suspend all rx queue activity for this ep */
1718                         set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
1719                 }
1720                 /* CONN_DISCONNECT timeout may or may not be an issue depending
1721                  * on what transcribed in TCP layer, different targets behave
1722                  * differently
1723                  */
1724                 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
1725                                   "please submit GRC Dump, NW/PCIe trace, "
1726                                   "driver msgs to developers for analysis\n",
1727                                   hba->netdev->name);
1728         }
1729 
1730         ep->state = EP_STATE_CLEANUP_START;
1731         timer_setup(&ep->ofld_timer, bnx2i_ep_ofld_timer, 0);
1732         ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
1733         add_timer(&ep->ofld_timer);
1734 
1735         bnx2i_ep_destroy_list_add(hba, ep);
1736 
1737         /* destroy iSCSI context, wait for it to complete */
1738         if (bnx2i_send_conn_destroy(hba, ep))
1739                 ep->state = EP_STATE_CLEANUP_CMPL;
1740 
1741         wait_event_interruptible(ep->ofld_wait,
1742                                  (ep->state != EP_STATE_CLEANUP_START));
1743 
1744         if (signal_pending(current))
1745                 flush_signals(current);
1746         del_timer_sync(&ep->ofld_timer);
1747 
1748         bnx2i_ep_destroy_list_del(hba, ep);
1749 
1750         if (ep->state != EP_STATE_CLEANUP_CMPL)
1751                 /* should never happen */
1752                 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1753 
1754         return 0;
1755 }
1756 
1757 
1758 /**
1759  * bnx2i_ep_connect - establish TCP connection to target portal
1760  * @shost:              scsi host
1761  * @dst_addr:           target IP address
1762  * @non_blocking:       blocking or non-blocking call
1763  *
1764  * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1765  *      with l5_core and the CNIC. This is a multi-step process of resolving
1766  *      route to target, create a iscsi connection context, handshaking with
1767  *      CNIC module to create/initialize the socket struct and finally
1768  *      sending down option-2 request to complete TCP 3-way handshake
1769  */
1770 static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1771                                                struct sockaddr *dst_addr,
1772                                                int non_blocking)
1773 {
1774         u32 iscsi_cid = BNX2I_CID_RESERVED;
1775         struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1776         struct sockaddr_in6 *desti6;
1777         struct bnx2i_endpoint *bnx2i_ep;
1778         struct bnx2i_hba *hba;
1779         struct cnic_dev *cnic;
1780         struct cnic_sockaddr saddr;
1781         struct iscsi_endpoint *ep;
1782         int rc = 0;
1783 
1784         if (shost) {
1785                 /* driver is given scsi host to work with */
1786                 hba = iscsi_host_priv(shost);
1787         } else
1788                 /*
1789                  * check if the given destination can be reached through
1790                  * a iscsi capable NetXtreme2 device
1791                  */
1792                 hba = bnx2i_check_route(dst_addr);
1793 
1794         if (!hba) {
1795                 rc = -EINVAL;
1796                 goto nohba;
1797         }
1798         mutex_lock(&hba->net_dev_lock);
1799 
1800         if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) {
1801                 rc = -EPERM;
1802                 goto check_busy;
1803         }
1804         cnic = hba->cnic;
1805         ep = bnx2i_alloc_ep(hba);
1806         if (!ep) {
1807                 rc = -ENOMEM;
1808                 goto check_busy;
1809         }
1810         bnx2i_ep = ep->dd_data;
1811 
1812         atomic_set(&bnx2i_ep->num_active_cmds, 0);
1813         iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1814         if (iscsi_cid == -1) {
1815                 printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate "
1816                         "iscsi cid\n", hba->netdev->name);
1817                 rc = -ENOMEM;
1818                 bnx2i_free_ep(ep);
1819                 goto check_busy;
1820         }
1821         bnx2i_ep->hba_age = hba->age;
1822 
1823         rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1824         if (rc != 0) {
1825                 printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error"
1826                         "\n", hba->netdev->name);
1827                 rc = -ENOMEM;
1828                 goto qp_resc_err;
1829         }
1830 
1831         bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1832         bnx2i_ep->state = EP_STATE_OFLD_START;
1833         bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1834 
1835         timer_setup(&bnx2i_ep->ofld_timer, bnx2i_ep_ofld_timer, 0);
1836         bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1837         add_timer(&bnx2i_ep->ofld_timer);
1838 
1839         if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) {
1840                 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1841                         printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1842                                 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1843                         rc = -EBUSY;
1844                 } else
1845                         rc = -ENOSPC;
1846                 printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe"
1847                         "\n", hba->netdev->name);
1848                 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1849                 goto conn_failed;
1850         }
1851 
1852         /* Wait for CNIC hardware to setup conn context and return 'cid' */
1853         wait_event_interruptible(bnx2i_ep->ofld_wait,
1854                                  bnx2i_ep->state != EP_STATE_OFLD_START);
1855 
1856         if (signal_pending(current))
1857                 flush_signals(current);
1858         del_timer_sync(&bnx2i_ep->ofld_timer);
1859 
1860         bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1861 
1862         if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1863                 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1864                         printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1865                                 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1866                         rc = -EBUSY;
1867                 } else
1868                         rc = -ENOSPC;
1869                 goto conn_failed;
1870         }
1871 
1872         rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1873                              iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1874         if (rc) {
1875                 rc = -EINVAL;
1876                 /* Need to terminate and cleanup the connection */
1877                 goto release_ep;
1878         }
1879 
1880         bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1881         bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1882         clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1883 
1884         memset(&saddr, 0, sizeof(saddr));
1885         if (dst_addr->sa_family == AF_INET) {
1886                 desti = (struct sockaddr_in *) dst_addr;
1887                 saddr.remote.v4 = *desti;
1888                 saddr.local.v4.sin_family = desti->sin_family;
1889         } else if (dst_addr->sa_family == AF_INET6) {
1890                 desti6 = (struct sockaddr_in6 *) dst_addr;
1891                 saddr.remote.v6 = *desti6;
1892                 saddr.local.v6.sin6_family = desti6->sin6_family;
1893         }
1894 
1895         bnx2i_ep->timestamp = jiffies;
1896         bnx2i_ep->state = EP_STATE_CONNECT_START;
1897         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1898                 rc = -EINVAL;
1899                 goto conn_failed;
1900         } else
1901                 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
1902         if (rc)
1903                 goto release_ep;
1904 
1905         bnx2i_ep_active_list_add(hba, bnx2i_ep);
1906 
1907         rc = bnx2i_map_ep_dbell_regs(bnx2i_ep);
1908         if (rc)
1909                 goto del_active_ep;
1910 
1911         mutex_unlock(&hba->net_dev_lock);
1912         return ep;
1913 
1914 del_active_ep:
1915         bnx2i_ep_active_list_del(hba, bnx2i_ep);
1916 release_ep:
1917         if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1918                 mutex_unlock(&hba->net_dev_lock);
1919                 return ERR_PTR(rc);
1920         }
1921 conn_failed:
1922         bnx2i_free_qp_resc(hba, bnx2i_ep);
1923 qp_resc_err:
1924         bnx2i_free_ep(ep);
1925 check_busy:
1926         mutex_unlock(&hba->net_dev_lock);
1927 nohba:
1928         return ERR_PTR(rc);
1929 }
1930 
1931 
1932 /**
1933  * bnx2i_ep_poll - polls for TCP connection establishement
1934  * @ep:                 TCP connection (endpoint) handle
1935  * @timeout_ms:         timeout value in milli secs
1936  *
1937  * polls for TCP connect request to complete
1938  */
1939 static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1940 {
1941         struct bnx2i_endpoint *bnx2i_ep;
1942         int rc = 0;
1943 
1944         bnx2i_ep = ep->dd_data;
1945         if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1946             (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1947             (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1948                 return -1;
1949         if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1950                 return 1;
1951 
1952         rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1953                                               ((bnx2i_ep->state ==
1954                                                 EP_STATE_OFLD_FAILED) ||
1955                                                (bnx2i_ep->state ==
1956                                                 EP_STATE_CONNECT_FAILED) ||
1957                                                (bnx2i_ep->state ==
1958                                                 EP_STATE_CONNECT_COMPL)),
1959                                               msecs_to_jiffies(timeout_ms));
1960         if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
1961                 rc = -1;
1962 
1963         if (rc > 0)
1964                 return 1;
1965         else if (!rc)
1966                 return 0;       /* timeout */
1967         else
1968                 return rc;
1969 }
1970 
1971 
1972 /**
1973  * bnx2i_ep_tcp_conn_active - check EP state transition
1974  * @ep:         endpoint pointer
1975  *
1976  * check if underlying TCP connection is active
1977  */
1978 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1979 {
1980         int ret;
1981         int cnic_dev_10g = 0;
1982 
1983         if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1984                 cnic_dev_10g = 1;
1985 
1986         switch (bnx2i_ep->state) {
1987         case EP_STATE_CLEANUP_FAILED:
1988         case EP_STATE_OFLD_FAILED:
1989         case EP_STATE_DISCONN_TIMEDOUT:
1990                 ret = 0;
1991                 break;
1992         case EP_STATE_CONNECT_START:
1993         case EP_STATE_CONNECT_FAILED:
1994         case EP_STATE_CONNECT_COMPL:
1995         case EP_STATE_ULP_UPDATE_START:
1996         case EP_STATE_ULP_UPDATE_COMPL:
1997         case EP_STATE_TCP_FIN_RCVD:
1998         case EP_STATE_LOGOUT_SENT:
1999         case EP_STATE_LOGOUT_RESP_RCVD:
2000         case EP_STATE_ULP_UPDATE_FAILED:
2001                 ret = 1;
2002                 break;
2003         case EP_STATE_TCP_RST_RCVD:
2004                 if (cnic_dev_10g)
2005                         ret = 0;
2006                 else
2007                         ret = 1;
2008                 break;
2009         default:
2010                 ret = 0;
2011         }
2012 
2013         return ret;
2014 }
2015 
2016 
2017 /*
2018  * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
2019  * @ep:         TCP connection (bnx2i endpoint) handle
2020  *
2021  * executes  TCP connection teardown process
2022  */
2023 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
2024 {
2025         struct bnx2i_hba *hba = bnx2i_ep->hba;
2026         struct cnic_dev *cnic;
2027         struct iscsi_session *session = NULL;
2028         struct iscsi_conn *conn = NULL;
2029         int ret = 0;
2030         int close = 0;
2031         int close_ret = 0;
2032 
2033         if (!hba)
2034                 return 0;
2035 
2036         cnic = hba->cnic;
2037         if (!cnic)
2038                 return 0;
2039 
2040         if (bnx2i_ep->state == EP_STATE_IDLE ||
2041             bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2042                 return 0;
2043 
2044         if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
2045                 goto destroy_conn;
2046 
2047         if (bnx2i_ep->conn) {
2048                 conn = bnx2i_ep->conn->cls_conn->dd_data;
2049                 session = conn->session;
2050         }
2051 
2052         timer_setup(&bnx2i_ep->ofld_timer, bnx2i_ep_ofld_timer, 0);
2053         bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
2054         add_timer(&bnx2i_ep->ofld_timer);
2055 
2056         if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
2057                 goto out;
2058 
2059         if (session) {
2060                 spin_lock_bh(&session->frwd_lock);
2061                 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
2062                         if (session->state == ISCSI_STATE_LOGGING_OUT) {
2063                                 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
2064                                         /* Logout sent, but no resp */
2065                                         printk(KERN_ALERT "bnx2i (%s): WARNING"
2066                                                 " logout response was not "
2067                                                 "received!\n",
2068                                                 bnx2i_ep->hba->netdev->name);
2069                                 } else if (bnx2i_ep->state ==
2070                                            EP_STATE_LOGOUT_RESP_RCVD)
2071                                         close = 1;
2072                         }
2073                 } else
2074                         close = 1;
2075 
2076                 spin_unlock_bh(&session->frwd_lock);
2077         }
2078 
2079         bnx2i_ep->state = EP_STATE_DISCONN_START;
2080 
2081         if (close)
2082                 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
2083         else
2084                 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2085 
2086         if (close_ret)
2087                 printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n",
2088                         bnx2i_ep->hba->netdev->name, close, close_ret);
2089         else
2090                 /* wait for option-2 conn teardown */
2091                 wait_event_interruptible(bnx2i_ep->ofld_wait,
2092                                 ((bnx2i_ep->state != EP_STATE_DISCONN_START)
2093                                 && (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD)));
2094 
2095         if (signal_pending(current))
2096                 flush_signals(current);
2097         del_timer_sync(&bnx2i_ep->ofld_timer);
2098 
2099 destroy_conn:
2100         bnx2i_ep_active_list_del(hba, bnx2i_ep);
2101         if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2102                 return -EINVAL;
2103 out:
2104         bnx2i_ep->state = EP_STATE_IDLE;
2105         return ret;
2106 }
2107 
2108 
2109 /**
2110  * bnx2i_ep_disconnect - executes TCP connection teardown process
2111  * @ep:         TCP connection (iscsi endpoint) handle
2112  *
2113  * executes  TCP connection teardown process
2114  */
2115 static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2116 {
2117         struct bnx2i_endpoint *bnx2i_ep;
2118         struct bnx2i_conn *bnx2i_conn = NULL;
2119         struct iscsi_conn *conn = NULL;
2120         struct bnx2i_hba *hba;
2121 
2122         bnx2i_ep = ep->dd_data;
2123 
2124         /* driver should not attempt connection cleanup until TCP_CONNECT
2125          * completes either successfully or fails. Timeout is 9-secs, so
2126          * wait for it to complete
2127          */
2128         while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2129                 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2130                 msleep(250);
2131 
2132         if (bnx2i_ep->conn) {
2133                 bnx2i_conn = bnx2i_ep->conn;
2134                 conn = bnx2i_conn->cls_conn->dd_data;
2135                 iscsi_suspend_queue(conn);
2136         }
2137         hba = bnx2i_ep->hba;
2138 
2139         mutex_lock(&hba->net_dev_lock);
2140 
2141         if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2142                 goto out;
2143 
2144         if (bnx2i_ep->state == EP_STATE_IDLE)
2145                 goto free_resc;
2146 
2147         if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
2148             (bnx2i_ep->hba_age != hba->age)) {
2149                 bnx2i_ep_active_list_del(hba, bnx2i_ep);
2150                 goto free_resc;
2151         }
2152 
2153         /* Do all chip cleanup here */
2154         if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
2155                 mutex_unlock(&hba->net_dev_lock);
2156                 return;
2157         }
2158 free_resc:
2159         bnx2i_free_qp_resc(hba, bnx2i_ep);
2160 
2161         if (bnx2i_conn)
2162                 bnx2i_conn->ep = NULL;
2163 
2164         bnx2i_free_ep(ep);
2165 out:
2166         mutex_unlock(&hba->net_dev_lock);
2167 
2168         wake_up_interruptible(&hba->eh_wait);
2169 }
2170 
2171 
2172 /**
2173  * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2174  * @buf:        pointer to buffer containing iscsi path message
2175  *
2176  */
2177 static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
2178 {
2179         struct bnx2i_hba *hba = iscsi_host_priv(shost);
2180         char *buf = (char *) params;
2181         u16 len = sizeof(*params);
2182 
2183         /* handled by cnic driver */
2184         hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
2185                                      len);
2186 
2187         return 0;
2188 }
2189 
2190 static umode_t bnx2i_attr_is_visible(int param_type, int param)
2191 {
2192         switch (param_type) {
2193         case ISCSI_HOST_PARAM:
2194                 switch (param) {
2195                 case ISCSI_HOST_PARAM_NETDEV_NAME:
2196                 case ISCSI_HOST_PARAM_HWADDRESS:
2197                 case ISCSI_HOST_PARAM_IPADDRESS:
2198                         return S_IRUGO;
2199                 default:
2200                         return 0;
2201                 }
2202         case ISCSI_PARAM:
2203                 switch (param) {
2204                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
2205                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2206                 case ISCSI_PARAM_HDRDGST_EN:
2207                 case ISCSI_PARAM_DATADGST_EN:
2208                 case ISCSI_PARAM_CONN_ADDRESS:
2209                 case ISCSI_PARAM_CONN_PORT:
2210                 case ISCSI_PARAM_EXP_STATSN:
2211                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
2212                 case ISCSI_PARAM_PERSISTENT_PORT:
2213                 case ISCSI_PARAM_PING_TMO:
2214                 case ISCSI_PARAM_RECV_TMO:
2215                 case ISCSI_PARAM_INITIAL_R2T_EN:
2216                 case ISCSI_PARAM_MAX_R2T:
2217                 case ISCSI_PARAM_IMM_DATA_EN:
2218                 case ISCSI_PARAM_FIRST_BURST:
2219                 case ISCSI_PARAM_MAX_BURST:
2220                 case ISCSI_PARAM_PDU_INORDER_EN:
2221                 case ISCSI_PARAM_DATASEQ_INORDER_EN:
2222                 case ISCSI_PARAM_ERL:
2223                 case ISCSI_PARAM_TARGET_NAME:
2224                 case ISCSI_PARAM_TPGT:
2225                 case ISCSI_PARAM_USERNAME:
2226                 case ISCSI_PARAM_PASSWORD:
2227                 case ISCSI_PARAM_USERNAME_IN:
2228                 case ISCSI_PARAM_PASSWORD_IN:
2229                 case ISCSI_PARAM_FAST_ABORT:
2230                 case ISCSI_PARAM_ABORT_TMO:
2231                 case ISCSI_PARAM_LU_RESET_TMO:
2232                 case ISCSI_PARAM_TGT_RESET_TMO:
2233                 case ISCSI_PARAM_IFACE_NAME:
2234                 case ISCSI_PARAM_INITIATOR_NAME:
2235                 case ISCSI_PARAM_BOOT_ROOT:
2236                 case ISCSI_PARAM_BOOT_NIC:
2237                 case ISCSI_PARAM_BOOT_TARGET:
2238                         return S_IRUGO;
2239                 default:
2240                         return 0;
2241                 }
2242         }
2243 
2244         return 0;
2245 }
2246 
2247 /*
2248  * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2249  * used while registering with the scsi host and iSCSI transport module.
2250  */
2251 static struct scsi_host_template bnx2i_host_template = {
2252         .module                 = THIS_MODULE,
2253         .name                   = "QLogic Offload iSCSI Initiator",
2254         .proc_name              = "bnx2i",
2255         .queuecommand           = iscsi_queuecommand,
2256         .eh_timed_out           = iscsi_eh_cmd_timed_out,
2257         .eh_abort_handler       = iscsi_eh_abort,
2258         .eh_device_reset_handler = iscsi_eh_device_reset,
2259         .eh_target_reset_handler = iscsi_eh_recover_target,
2260         .change_queue_depth     = scsi_change_queue_depth,
2261         .target_alloc           = iscsi_target_alloc,
2262         .can_queue              = 2048,
2263         .max_sectors            = 127,
2264         .cmd_per_lun            = 128,
2265         .this_id                = -1,
2266         .sg_tablesize           = ISCSI_MAX_BDS_PER_CMD,
2267         .shost_attrs            = bnx2i_dev_attributes,
2268         .track_queue_depth      = 1,
2269 };
2270 
2271 struct iscsi_transport bnx2i_iscsi_transport = {
2272         .owner                  = THIS_MODULE,
2273         .name                   = "bnx2i",
2274         .caps                   = CAP_RECOVERY_L0 | CAP_HDRDGST |
2275                                   CAP_MULTI_R2T | CAP_DATADGST |
2276                                   CAP_DATA_PATH_OFFLOAD |
2277                                   CAP_TEXT_NEGO,
2278         .create_session         = bnx2i_session_create,
2279         .destroy_session        = bnx2i_session_destroy,
2280         .create_conn            = bnx2i_conn_create,
2281         .bind_conn              = bnx2i_conn_bind,
2282         .destroy_conn           = bnx2i_conn_destroy,
2283         .attr_is_visible        = bnx2i_attr_is_visible,
2284         .set_param              = iscsi_set_param,
2285         .get_conn_param         = iscsi_conn_get_param,
2286         .get_session_param      = iscsi_session_get_param,
2287         .get_host_param         = bnx2i_host_get_param,
2288         .start_conn             = bnx2i_conn_start,
2289         .stop_conn              = iscsi_conn_stop,
2290         .send_pdu               = iscsi_conn_send_pdu,
2291         .xmit_task              = bnx2i_task_xmit,
2292         .get_stats              = bnx2i_conn_get_stats,
2293         /* TCP connect - disconnect - option-2 interface calls */
2294         .get_ep_param           = bnx2i_ep_get_param,
2295         .ep_connect             = bnx2i_ep_connect,
2296         .ep_poll                = bnx2i_ep_poll,
2297         .ep_disconnect          = bnx2i_ep_disconnect,
2298         .set_path               = bnx2i_nl_set_path,
2299         /* Error recovery timeout call */
2300         .session_recovery_timedout = iscsi_session_recovery_timedout,
2301         .cleanup_task           = bnx2i_cleanup_task,
2302 };
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/scsi/bnx2i/bnx2i_iscsi.c

DEFINITIONS
