1 /** 2 * Copyright (C) 2005 - 2010 ServerEngines 3 * All rights reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License version 2 7 * as published by the Free Software Foundation. The full GNU General 8 * Public License is included in this distribution in the file called COPYING. 9 * 10 * Written by: Jayamohan Kallickal (jayamohank@serverengines.com) 11 * 12 * Contact Information: 13 * linux-drivers@serverengines.com 14 * 15 * ServerEngines 16 * 209 N. Fair Oaks Ave 17 * Sunnyvale, CA 94085 18 * 19 */ 20 21 #include <scsi/libiscsi.h> 22 #include <scsi/scsi_transport_iscsi.h> 23 #include <scsi/scsi_transport.h> 24 #include <scsi/scsi_cmnd.h> 25 #include <scsi/scsi_device.h> 26 #include <scsi/scsi_host.h> 27 #include <scsi/scsi.h> 28 29 #include "be_iscsi.h" 30 31 extern struct iscsi_transport beiscsi_iscsi_transport; 32 33 /** 34 * beiscsi_session_create - creates a new iscsi session 35 * @cmds_max: max commands supported 36 * @qdepth: max queue depth supported 37 * @initial_cmdsn: initial iscsi CMDSN 38 */ 39 struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep, 40 u16 cmds_max, 41 u16 qdepth, 42 u32 initial_cmdsn) 43 { 44 struct Scsi_Host *shost; 45 struct beiscsi_endpoint *beiscsi_ep; 46 struct iscsi_cls_session *cls_session; 47 struct beiscsi_hba *phba; 48 struct iscsi_session *sess; 49 struct beiscsi_session *beiscsi_sess; 50 struct beiscsi_io_task *io_task; 51 52 SE_DEBUG(DBG_LVL_8, "In beiscsi_session_create\n"); 53 54 if (!ep) { 55 SE_DEBUG(DBG_LVL_1, "beiscsi_session_create: invalid ep\n"); 56 return NULL; 57 } 58 beiscsi_ep = ep->dd_data; 59 phba = beiscsi_ep->phba; 60 shost = phba->shost; 61 if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) { 62 shost_printk(KERN_ERR, shost, "Cannot handle %d cmds." 63 "Max cmds per session supported is %d. Using %d. " 64 "\n", cmds_max, 65 beiscsi_ep->phba->params.wrbs_per_cxn, 66 beiscsi_ep->phba->params.wrbs_per_cxn); 67 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn; 68 } 69 70 cls_session = iscsi_session_setup(&beiscsi_iscsi_transport, 71 shost, cmds_max, 72 sizeof(*beiscsi_sess), 73 sizeof(*io_task), 74 initial_cmdsn, ISCSI_MAX_TARGET); 75 if (!cls_session) 76 return NULL; 77 sess = cls_session->dd_data; 78 beiscsi_sess = sess->dd_data; 79 beiscsi_sess->bhs_pool = pci_pool_create("beiscsi_bhs_pool", 80 phba->pcidev, 81 sizeof(struct be_cmd_bhs), 82 64, 0); 83 if (!beiscsi_sess->bhs_pool) 84 goto destroy_sess; 85 86 return cls_session; 87 destroy_sess: 88 iscsi_session_teardown(cls_session); 89 return NULL; 90 } 91 92 /** 93 * beiscsi_session_destroy - destroys iscsi session 94 * @cls_session: pointer to iscsi cls session 95 * 96 * Destroys iSCSI session instance and releases 97 * resources allocated for it. 98 */ 99 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session) 100 { 101 struct iscsi_session *sess = cls_session->dd_data; 102 struct beiscsi_session *beiscsi_sess = sess->dd_data; 103 104 SE_DEBUG(DBG_LVL_8, "In beiscsi_session_destroy\n"); 105 pci_pool_destroy(beiscsi_sess->bhs_pool); 106 iscsi_session_teardown(cls_session); 107 } 108 109 /** 110 * beiscsi_conn_create - create an instance of iscsi connection 111 * @cls_session: ptr to iscsi_cls_session 112 * @cid: iscsi cid 113 */ 114 struct iscsi_cls_conn * 115 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid) 116 { 117 struct beiscsi_hba *phba; 118 struct Scsi_Host *shost; 119 struct iscsi_cls_conn *cls_conn; 120 struct beiscsi_conn *beiscsi_conn; 121 struct iscsi_conn *conn; 122 struct iscsi_session *sess; 123 struct beiscsi_session *beiscsi_sess; 124 125 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid" 126 "from iscsi layer=%d\n", cid); 127 shost = iscsi_session_to_shost(cls_session); 128 phba = iscsi_host_priv(shost); 129 130 cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid); 131 if (!cls_conn) 132 return NULL; 133 134 conn = cls_conn->dd_data; 135 beiscsi_conn = conn->dd_data; 136 beiscsi_conn->ep = NULL; 137 beiscsi_conn->phba = phba; 138 beiscsi_conn->conn = conn; 139 sess = cls_session->dd_data; 140 beiscsi_sess = sess->dd_data; 141 beiscsi_conn->beiscsi_sess = beiscsi_sess; 142 return cls_conn; 143 } 144 145 /** 146 * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table 147 * @beiscsi_conn: The pointer to beiscsi_conn structure 148 * @phba: The phba instance 149 * @cid: The cid to free 150 */ 151 static int beiscsi_bindconn_cid(struct beiscsi_hba *phba, 152 struct beiscsi_conn *beiscsi_conn, 153 unsigned int cid) 154 { 155 if (phba->conn_table[cid]) { 156 SE_DEBUG(DBG_LVL_1, 157 "Connection table already occupied. Detected clash\n"); 158 return -EINVAL; 159 } else { 160 SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn)\n", 161 cid, beiscsi_conn); 162 phba->conn_table[cid] = beiscsi_conn; 163 } 164 return 0; 165 } 166 167 /** 168 * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection 169 * @cls_session: pointer to iscsi cls session 170 * @cls_conn: pointer to iscsi cls conn 171 * @transport_fd: EP handle(64 bit) 172 * 173 * This function binds the TCP Conn with iSCSI Connection and Session. 174 */ 175 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session, 176 struct iscsi_cls_conn *cls_conn, 177 u64 transport_fd, int is_leading) 178 { 179 struct iscsi_conn *conn = cls_conn->dd_data; 180 struct beiscsi_conn *beiscsi_conn = conn->dd_data; 181 struct Scsi_Host *shost = 182 (struct Scsi_Host *)iscsi_session_to_shost(cls_session); 183 struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost); 184 struct beiscsi_endpoint *beiscsi_ep; 185 struct iscsi_endpoint *ep; 186 187 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n"); 188 ep = iscsi_lookup_endpoint(transport_fd); 189 if (!ep) 190 return -EINVAL; 191 192 beiscsi_ep = ep->dd_data; 193 194 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) 195 return -EINVAL; 196 197 if (beiscsi_ep->phba != phba) { 198 SE_DEBUG(DBG_LVL_8, 199 "beiscsi_ep->hba=%p not equal to phba=%p\n", 200 beiscsi_ep->phba, phba); 201 return -EEXIST; 202 } 203 204 beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid; 205 beiscsi_conn->ep = beiscsi_ep; 206 beiscsi_ep->conn = beiscsi_conn; 207 SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d\n", 208 beiscsi_conn, conn, beiscsi_ep->ep_cid); 209 return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid); 210 } 211 212 /** 213 * beiscsi_ep_get_param - get the iscsi parameter 214 * @ep: pointer to iscsi ep 215 * @param: parameter type identifier 216 * @buf: buffer pointer 217 * 218 * returns iscsi parameter 219 */ 220 int beiscsi_ep_get_param(struct iscsi_endpoint *ep, 221 enum iscsi_param param, char *buf) 222 { 223 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 224 int len = 0; 225 226 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param); 227 228 switch (param) { 229 case ISCSI_PARAM_CONN_PORT: 230 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport); 231 break; 232 case ISCSI_PARAM_CONN_ADDRESS: 233 if (beiscsi_ep->ip_type == BE2_IPV4) 234 len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr); 235 else 236 len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr); 237 break; 238 default: 239 return -ENOSYS; 240 } 241 return len; 242 } 243 244 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn, 245 enum iscsi_param param, char *buf, int buflen) 246 { 247 struct iscsi_conn *conn = cls_conn->dd_data; 248 struct iscsi_session *session = conn->session; 249 int ret; 250 251 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param); 252 ret = iscsi_set_param(cls_conn, param, buf, buflen); 253 if (ret) 254 return ret; 255 /* 256 * If userspace tried to set the value to higher than we can 257 * support override here. 258 */ 259 switch (param) { 260 case ISCSI_PARAM_FIRST_BURST: 261 if (session->first_burst > 8192) 262 session->first_burst = 8192; 263 break; 264 case ISCSI_PARAM_MAX_RECV_DLENGTH: 265 if (conn->max_recv_dlength > 65536) 266 conn->max_recv_dlength = 65536; 267 break; 268 case ISCSI_PARAM_MAX_BURST: 269 if (session->max_burst > 262144) 270 session->max_burst = 262144; 271 break; 272 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 273 if ((conn->max_xmit_dlength > 65536) || 274 (conn->max_xmit_dlength == 0)) 275 conn->max_xmit_dlength = 65536; 276 default: 277 return 0; 278 } 279 280 return 0; 281 } 282 283 /** 284 * beiscsi_get_host_param - get the iscsi parameter 285 * @shost: pointer to scsi_host structure 286 * @param: parameter type identifier 287 * @buf: buffer pointer 288 * 289 * returns host parameter 290 */ 291 int beiscsi_get_host_param(struct Scsi_Host *shost, 292 enum iscsi_host_param param, char *buf) 293 { 294 struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost); 295 int status = 0; 296 297 SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param); 298 switch (param) { 299 case ISCSI_HOST_PARAM_HWADDRESS: 300 status = beiscsi_get_macaddr(buf, phba); 301 if (status < 0) { 302 SE_DEBUG(DBG_LVL_1, "beiscsi_get_macaddr Failed\n"); 303 return status; 304 } 305 break; 306 default: 307 return iscsi_host_get_param(shost, param, buf); 308 } 309 return status; 310 } 311 312 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba) 313 { 314 struct be_cmd_resp_get_mac_addr *resp; 315 struct be_mcc_wrb *wrb; 316 unsigned int tag, wrb_num; 317 unsigned short status, extd_status; 318 struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; 319 int rc; 320 321 if (phba->read_mac_address) 322 return sysfs_format_mac(buf, phba->mac_address, 323 ETH_ALEN); 324 325 tag = be_cmd_get_mac_addr(phba); 326 if (!tag) { 327 SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n"); 328 return -EBUSY; 329 } else 330 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 331 phba->ctrl.mcc_numtag[tag]); 332 333 wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; 334 extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; 335 status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; 336 if (status || extd_status) { 337 SE_DEBUG(DBG_LVL_1, "Failed to get be_cmd_get_mac_addr" 338 " status = %d extd_status = %d\n", 339 status, extd_status); 340 free_mcc_tag(&phba->ctrl, tag); 341 return -EAGAIN; 342 } 343 wrb = queue_get_wrb(mccq, wrb_num); 344 free_mcc_tag(&phba->ctrl, tag); 345 resp = embedded_payload(wrb); 346 memcpy(phba->mac_address, resp->mac_address, ETH_ALEN); 347 rc = sysfs_format_mac(buf, phba->mac_address, 348 ETH_ALEN); 349 phba->read_mac_address = 1; 350 return rc; 351 } 352 353 354 /** 355 * beiscsi_conn_get_stats - get the iscsi stats 356 * @cls_conn: pointer to iscsi cls conn 357 * @stats: pointer to iscsi_stats structure 358 * 359 * returns iscsi stats 360 */ 361 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 362 struct iscsi_stats *stats) 363 { 364 struct iscsi_conn *conn = cls_conn->dd_data; 365 366 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n"); 367 stats->txdata_octets = conn->txdata_octets; 368 stats->rxdata_octets = conn->rxdata_octets; 369 stats->dataout_pdus = conn->dataout_pdus_cnt; 370 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 371 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 372 stats->datain_pdus = conn->datain_pdus_cnt; 373 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 374 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 375 stats->r2t_pdus = conn->r2t_pdus_cnt; 376 stats->digest_err = 0; 377 stats->timeout_err = 0; 378 stats->custom_length = 0; 379 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 380 stats->custom[0].value = conn->eh_abort_cnt; 381 } 382 383 /** 384 * beiscsi_set_params_for_offld - get the parameters for offload 385 * @beiscsi_conn: pointer to beiscsi_conn 386 * @params: pointer to offload_params structure 387 */ 388 static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn, 389 struct beiscsi_offload_params *params) 390 { 391 struct iscsi_conn *conn = beiscsi_conn->conn; 392 struct iscsi_session *session = conn->session; 393 394 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length, 395 params, session->max_burst); 396 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 397 max_send_data_segment_length, params, 398 conn->max_xmit_dlength); 399 AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length, 400 params, session->first_burst); 401 AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params, 402 session->erl); 403 AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params, 404 conn->datadgst_en); 405 AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params, 406 conn->hdrdgst_en); 407 AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params, 408 session->initial_r2t_en); 409 AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params, 410 session->imm_data_en); 411 AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params, 412 (conn->exp_statsn - 1)); 413 } 414 415 /** 416 * beiscsi_conn_start - offload of session to chip 417 * @cls_conn: pointer to beiscsi_conn 418 */ 419 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) 420 { 421 struct iscsi_conn *conn = cls_conn->dd_data; 422 struct beiscsi_conn *beiscsi_conn = conn->dd_data; 423 struct beiscsi_endpoint *beiscsi_ep; 424 struct beiscsi_offload_params params; 425 426 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n"); 427 memset(¶ms, 0, sizeof(struct beiscsi_offload_params)); 428 beiscsi_ep = beiscsi_conn->ep; 429 if (!beiscsi_ep) 430 SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n"); 431 432 beiscsi_conn->login_in_progress = 0; 433 beiscsi_set_params_for_offld(beiscsi_conn, ¶ms); 434 beiscsi_offload_connection(beiscsi_conn, ¶ms); 435 iscsi_conn_start(cls_conn); 436 return 0; 437 } 438 439 /** 440 * beiscsi_get_cid - Allocate a cid 441 * @phba: The phba instance 442 */ 443 static int beiscsi_get_cid(struct beiscsi_hba *phba) 444 { 445 unsigned short cid = 0xFFFF; 446 447 if (!phba->avlbl_cids) 448 return cid; 449 450 cid = phba->cid_array[phba->cid_alloc++]; 451 if (phba->cid_alloc == phba->params.cxns_per_ctrl) 452 phba->cid_alloc = 0; 453 phba->avlbl_cids--; 454 return cid; 455 } 456 457 /** 458 * beiscsi_put_cid - Free the cid 459 * @phba: The phba for which the cid is being freed 460 * @cid: The cid to free 461 */ 462 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) 463 { 464 phba->avlbl_cids++; 465 phba->cid_array[phba->cid_free++] = cid; 466 if (phba->cid_free == phba->params.cxns_per_ctrl) 467 phba->cid_free = 0; 468 } 469 470 /** 471 * beiscsi_free_ep - free endpoint 472 * @ep: pointer to iscsi endpoint structure 473 */ 474 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) 475 { 476 struct beiscsi_hba *phba = beiscsi_ep->phba; 477 478 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 479 beiscsi_ep->phba = NULL; 480 } 481 482 /** 483 * beiscsi_open_conn - Ask FW to open a TCP connection 484 * @ep: endpoint to be used 485 * @src_addr: The source IP address 486 * @dst_addr: The Destination IP address 487 * 488 * Asks the FW to open a TCP connection 489 */ 490 static int beiscsi_open_conn(struct iscsi_endpoint *ep, 491 struct sockaddr *src_addr, 492 struct sockaddr *dst_addr, int non_blocking) 493 { 494 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 495 struct beiscsi_hba *phba = beiscsi_ep->phba; 496 struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; 497 struct be_mcc_wrb *wrb; 498 struct tcp_connect_and_offload_out *ptcpcnct_out; 499 unsigned short status, extd_status; 500 struct be_dma_mem nonemb_cmd; 501 unsigned int tag, wrb_num; 502 int ret = -ENOMEM; 503 504 SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n"); 505 beiscsi_ep->ep_cid = beiscsi_get_cid(phba); 506 if (beiscsi_ep->ep_cid == 0xFFFF) { 507 SE_DEBUG(DBG_LVL_1, "No free cid available\n"); 508 return ret; 509 } 510 SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d\n", 511 beiscsi_ep->ep_cid); 512 phba->ep_array[beiscsi_ep->ep_cid - 513 phba->fw_config.iscsi_cid_start] = ep; 514 if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start + 515 phba->params.cxns_per_ctrl * 2)) { 516 SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n"); 517 goto free_ep; 518 } 519 520 beiscsi_ep->cid_vld = 0; 521 nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev, 522 sizeof(struct tcp_connect_and_offload_in), 523 &nonemb_cmd.dma); 524 if (nonemb_cmd.va == NULL) { 525 SE_DEBUG(DBG_LVL_1, 526 "Failed to allocate memory for mgmt_open_connection" 527 "\n"); 528 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 529 return -ENOMEM; 530 } 531 nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in); 532 memset(nonemb_cmd.va, 0, nonemb_cmd.size); 533 tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd); 534 if (!tag) { 535 SE_DEBUG(DBG_LVL_1, 536 "mgmt_open_connection Failed for cid=%d\n", 537 beiscsi_ep->ep_cid); 538 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 539 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, 540 nonemb_cmd.va, nonemb_cmd.dma); 541 return -EAGAIN; 542 } else { 543 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 544 phba->ctrl.mcc_numtag[tag]); 545 } 546 wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; 547 extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; 548 status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; 549 if (status || extd_status) { 550 SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed" 551 " status = %d extd_status = %d\n", 552 status, extd_status); 553 free_mcc_tag(&phba->ctrl, tag); 554 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, 555 nonemb_cmd.va, nonemb_cmd.dma); 556 goto free_ep; 557 } else { 558 wrb = queue_get_wrb(mccq, wrb_num); 559 free_mcc_tag(&phba->ctrl, tag); 560 561 ptcpcnct_out = embedded_payload(wrb); 562 beiscsi_ep = ep->dd_data; 563 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle; 564 beiscsi_ep->cid_vld = 1; 565 SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n"); 566 } 567 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, 568 nonemb_cmd.va, nonemb_cmd.dma); 569 return 0; 570 571 free_ep: 572 beiscsi_free_ep(beiscsi_ep); 573 return -EBUSY; 574 } 575 576 /** 577 * beiscsi_ep_connect - Ask chip to create TCP Conn 578 * @scsi_host: Pointer to scsi_host structure 579 * @dst_addr: The IP address of Target 580 * @non_blocking: blocking or non-blocking call 581 * 582 * This routines first asks chip to create a connection and then allocates an EP 583 */ 584 struct iscsi_endpoint * 585 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 586 int non_blocking) 587 { 588 struct beiscsi_hba *phba; 589 struct beiscsi_endpoint *beiscsi_ep; 590 struct iscsi_endpoint *ep; 591 int ret; 592 593 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n"); 594 if (shost) 595 phba = iscsi_host_priv(shost); 596 else { 597 ret = -ENXIO; 598 SE_DEBUG(DBG_LVL_1, "shost is NULL\n"); 599 return ERR_PTR(ret); 600 } 601 602 if (phba->state != BE_ADAPTER_UP) { 603 ret = -EBUSY; 604 SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n"); 605 return ERR_PTR(ret); 606 } 607 608 ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint)); 609 if (!ep) { 610 ret = -ENOMEM; 611 return ERR_PTR(ret); 612 } 613 614 beiscsi_ep = ep->dd_data; 615 beiscsi_ep->phba = phba; 616 beiscsi_ep->openiscsi_ep = ep; 617 ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking); 618 if (ret) { 619 SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n"); 620 goto free_ep; 621 } 622 623 return ep; 624 625 free_ep: 626 iscsi_destroy_endpoint(ep); 627 return ERR_PTR(ret); 628 } 629 630 /** 631 * beiscsi_ep_poll - Poll to see if connection is established 632 * @ep: endpoint to be used 633 * @timeout_ms: timeout specified in millisecs 634 * 635 * Poll to see if TCP connection established 636 */ 637 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 638 { 639 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 640 641 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_poll\n"); 642 if (beiscsi_ep->cid_vld == 1) 643 return 1; 644 else 645 return 0; 646 } 647 648 /** 649 * beiscsi_close_conn - Upload the connection 650 * @ep: The iscsi endpoint 651 * @flag: The type of connection closure 652 */ 653 static int beiscsi_close_conn(struct beiscsi_endpoint *beiscsi_ep, int flag) 654 { 655 int ret = 0; 656 unsigned int tag; 657 struct beiscsi_hba *phba = beiscsi_ep->phba; 658 659 tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag); 660 if (!tag) { 661 SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n", 662 beiscsi_ep->ep_cid); 663 ret = -EAGAIN; 664 } else { 665 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 666 phba->ctrl.mcc_numtag[tag]); 667 free_mcc_tag(&phba->ctrl, tag); 668 } 669 return ret; 670 } 671 672 /** 673 * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table 674 * @phba: The phba instance 675 * @cid: The cid to free 676 */ 677 static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba, 678 unsigned int cid) 679 { 680 if (phba->conn_table[cid]) 681 phba->conn_table[cid] = NULL; 682 else { 683 SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n"); 684 return -EINVAL; 685 } 686 return 0; 687 } 688 689 /** 690 * beiscsi_ep_disconnect - Tears down the TCP connection 691 * @ep: endpoint to be used 692 * 693 * Tears down the TCP connection 694 */ 695 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) 696 { 697 struct beiscsi_conn *beiscsi_conn; 698 struct beiscsi_endpoint *beiscsi_ep; 699 struct beiscsi_hba *phba; 700 unsigned int tag; 701 unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH; 702 703 beiscsi_ep = ep->dd_data; 704 phba = beiscsi_ep->phba; 705 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n", 706 beiscsi_ep->ep_cid); 707 708 if (!beiscsi_ep->conn) { 709 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no " 710 "beiscsi_ep\n"); 711 return; 712 } 713 beiscsi_conn = beiscsi_ep->conn; 714 iscsi_suspend_queue(beiscsi_conn->conn); 715 716 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n", 717 beiscsi_ep->ep_cid); 718 719 tag = mgmt_invalidate_connection(phba, beiscsi_ep, 720 beiscsi_ep->ep_cid, 1, 721 savecfg_flag); 722 if (!tag) { 723 SE_DEBUG(DBG_LVL_1, 724 "mgmt_invalidate_connection Failed for cid=%d\n", 725 beiscsi_ep->ep_cid); 726 } else { 727 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 728 phba->ctrl.mcc_numtag[tag]); 729 free_mcc_tag(&phba->ctrl, tag); 730 } 731 732 beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL); 733 beiscsi_free_ep(beiscsi_ep); 734 beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid); 735 iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep); 736 } 737