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_conn_get_param - get the iscsi parameter 214 * @cls_conn: pointer to iscsi cls conn 215 * @param: parameter type identifier 216 * @buf: buffer pointer 217 * 218 * returns iscsi parameter 219 */ 220 int beiscsi_conn_get_param(struct iscsi_cls_conn *cls_conn, 221 enum iscsi_param param, char *buf) 222 { 223 struct beiscsi_endpoint *beiscsi_ep; 224 struct iscsi_conn *conn = cls_conn->dd_data; 225 struct beiscsi_conn *beiscsi_conn = conn->dd_data; 226 int len = 0; 227 228 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param); 229 beiscsi_ep = beiscsi_conn->ep; 230 if (!beiscsi_ep) { 231 SE_DEBUG(DBG_LVL_1, 232 "In beiscsi_conn_get_param , no beiscsi_ep\n"); 233 return -ENODEV; 234 } 235 236 switch (param) { 237 case ISCSI_PARAM_CONN_PORT: 238 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport); 239 break; 240 case ISCSI_PARAM_CONN_ADDRESS: 241 if (beiscsi_ep->ip_type == BE2_IPV4) 242 len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr); 243 else 244 len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr); 245 break; 246 default: 247 return iscsi_conn_get_param(cls_conn, param, buf); 248 } 249 return len; 250 } 251 252 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn, 253 enum iscsi_param param, char *buf, int buflen) 254 { 255 struct iscsi_conn *conn = cls_conn->dd_data; 256 struct iscsi_session *session = conn->session; 257 int ret; 258 259 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param); 260 ret = iscsi_set_param(cls_conn, param, buf, buflen); 261 if (ret) 262 return ret; 263 /* 264 * If userspace tried to set the value to higher than we can 265 * support override here. 266 */ 267 switch (param) { 268 case ISCSI_PARAM_FIRST_BURST: 269 if (session->first_burst > 8192) 270 session->first_burst = 8192; 271 break; 272 case ISCSI_PARAM_MAX_RECV_DLENGTH: 273 if (conn->max_recv_dlength > 65536) 274 conn->max_recv_dlength = 65536; 275 break; 276 case ISCSI_PARAM_MAX_BURST: 277 if (session->max_burst > 262144) 278 session->max_burst = 262144; 279 break; 280 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 281 if ((conn->max_xmit_dlength > 65536) || 282 (conn->max_xmit_dlength == 0)) 283 conn->max_xmit_dlength = 65536; 284 default: 285 return 0; 286 } 287 288 return 0; 289 } 290 291 /** 292 * beiscsi_get_host_param - get the iscsi parameter 293 * @shost: pointer to scsi_host structure 294 * @param: parameter type identifier 295 * @buf: buffer pointer 296 * 297 * returns host parameter 298 */ 299 int beiscsi_get_host_param(struct Scsi_Host *shost, 300 enum iscsi_host_param param, char *buf) 301 { 302 struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost); 303 int status = 0; 304 305 SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param); 306 switch (param) { 307 case ISCSI_HOST_PARAM_HWADDRESS: 308 status = beiscsi_get_macaddr(buf, phba); 309 if (status < 0) { 310 SE_DEBUG(DBG_LVL_1, "beiscsi_get_macaddr Failed\n"); 311 return status; 312 } 313 break; 314 default: 315 return iscsi_host_get_param(shost, param, buf); 316 } 317 return status; 318 } 319 320 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba) 321 { 322 struct be_cmd_resp_get_mac_addr *resp; 323 struct be_mcc_wrb *wrb; 324 unsigned int tag, wrb_num; 325 unsigned short status, extd_status; 326 struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; 327 int rc; 328 329 if (phba->read_mac_address) 330 return sysfs_format_mac(buf, phba->mac_address, 331 ETH_ALEN); 332 333 tag = be_cmd_get_mac_addr(phba); 334 if (!tag) { 335 SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n"); 336 return -EBUSY; 337 } else 338 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 339 phba->ctrl.mcc_numtag[tag]); 340 341 wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; 342 extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; 343 status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; 344 if (status || extd_status) { 345 SE_DEBUG(DBG_LVL_1, "Failed to get be_cmd_get_mac_addr" 346 " status = %d extd_status = %d\n", 347 status, extd_status); 348 free_mcc_tag(&phba->ctrl, tag); 349 return -EAGAIN; 350 } 351 wrb = queue_get_wrb(mccq, wrb_num); 352 free_mcc_tag(&phba->ctrl, tag); 353 resp = embedded_payload(wrb); 354 memcpy(phba->mac_address, resp->mac_address, ETH_ALEN); 355 rc = sysfs_format_mac(buf, phba->mac_address, 356 ETH_ALEN); 357 phba->read_mac_address = 1; 358 return rc; 359 } 360 361 362 /** 363 * beiscsi_conn_get_stats - get the iscsi stats 364 * @cls_conn: pointer to iscsi cls conn 365 * @stats: pointer to iscsi_stats structure 366 * 367 * returns iscsi stats 368 */ 369 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 370 struct iscsi_stats *stats) 371 { 372 struct iscsi_conn *conn = cls_conn->dd_data; 373 374 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n"); 375 stats->txdata_octets = conn->txdata_octets; 376 stats->rxdata_octets = conn->rxdata_octets; 377 stats->dataout_pdus = conn->dataout_pdus_cnt; 378 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 379 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 380 stats->datain_pdus = conn->datain_pdus_cnt; 381 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 382 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 383 stats->r2t_pdus = conn->r2t_pdus_cnt; 384 stats->digest_err = 0; 385 stats->timeout_err = 0; 386 stats->custom_length = 0; 387 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 388 stats->custom[0].value = conn->eh_abort_cnt; 389 } 390 391 /** 392 * beiscsi_set_params_for_offld - get the parameters for offload 393 * @beiscsi_conn: pointer to beiscsi_conn 394 * @params: pointer to offload_params structure 395 */ 396 static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn, 397 struct beiscsi_offload_params *params) 398 { 399 struct iscsi_conn *conn = beiscsi_conn->conn; 400 struct iscsi_session *session = conn->session; 401 402 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length, 403 params, session->max_burst); 404 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 405 max_send_data_segment_length, params, 406 conn->max_xmit_dlength); 407 AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length, 408 params, session->first_burst); 409 AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params, 410 session->erl); 411 AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params, 412 conn->datadgst_en); 413 AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params, 414 conn->hdrdgst_en); 415 AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params, 416 session->initial_r2t_en); 417 AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params, 418 session->imm_data_en); 419 AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params, 420 (conn->exp_statsn - 1)); 421 } 422 423 /** 424 * beiscsi_conn_start - offload of session to chip 425 * @cls_conn: pointer to beiscsi_conn 426 */ 427 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) 428 { 429 struct iscsi_conn *conn = cls_conn->dd_data; 430 struct beiscsi_conn *beiscsi_conn = conn->dd_data; 431 struct beiscsi_endpoint *beiscsi_ep; 432 struct beiscsi_offload_params params; 433 434 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n"); 435 memset(¶ms, 0, sizeof(struct beiscsi_offload_params)); 436 beiscsi_ep = beiscsi_conn->ep; 437 if (!beiscsi_ep) 438 SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n"); 439 440 beiscsi_conn->login_in_progress = 0; 441 beiscsi_set_params_for_offld(beiscsi_conn, ¶ms); 442 beiscsi_offload_connection(beiscsi_conn, ¶ms); 443 iscsi_conn_start(cls_conn); 444 return 0; 445 } 446 447 /** 448 * beiscsi_get_cid - Allocate a cid 449 * @phba: The phba instance 450 */ 451 static int beiscsi_get_cid(struct beiscsi_hba *phba) 452 { 453 unsigned short cid = 0xFFFF; 454 455 if (!phba->avlbl_cids) 456 return cid; 457 458 cid = phba->cid_array[phba->cid_alloc++]; 459 if (phba->cid_alloc == phba->params.cxns_per_ctrl) 460 phba->cid_alloc = 0; 461 phba->avlbl_cids--; 462 return cid; 463 } 464 465 /** 466 * beiscsi_put_cid - Free the cid 467 * @phba: The phba for which the cid is being freed 468 * @cid: The cid to free 469 */ 470 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) 471 { 472 phba->avlbl_cids++; 473 phba->cid_array[phba->cid_free++] = cid; 474 if (phba->cid_free == phba->params.cxns_per_ctrl) 475 phba->cid_free = 0; 476 } 477 478 /** 479 * beiscsi_free_ep - free endpoint 480 * @ep: pointer to iscsi endpoint structure 481 */ 482 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) 483 { 484 struct beiscsi_hba *phba = beiscsi_ep->phba; 485 486 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 487 beiscsi_ep->phba = NULL; 488 } 489 490 /** 491 * beiscsi_open_conn - Ask FW to open a TCP connection 492 * @ep: endpoint to be used 493 * @src_addr: The source IP address 494 * @dst_addr: The Destination IP address 495 * 496 * Asks the FW to open a TCP connection 497 */ 498 static int beiscsi_open_conn(struct iscsi_endpoint *ep, 499 struct sockaddr *src_addr, 500 struct sockaddr *dst_addr, int non_blocking) 501 { 502 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 503 struct beiscsi_hba *phba = beiscsi_ep->phba; 504 struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; 505 struct be_mcc_wrb *wrb; 506 struct tcp_connect_and_offload_out *ptcpcnct_out; 507 unsigned short status, extd_status; 508 struct be_dma_mem nonemb_cmd; 509 unsigned int tag, wrb_num; 510 int ret = -ENOMEM; 511 512 SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n"); 513 beiscsi_ep->ep_cid = beiscsi_get_cid(phba); 514 if (beiscsi_ep->ep_cid == 0xFFFF) { 515 SE_DEBUG(DBG_LVL_1, "No free cid available\n"); 516 return ret; 517 } 518 SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d\n", 519 beiscsi_ep->ep_cid); 520 phba->ep_array[beiscsi_ep->ep_cid - 521 phba->fw_config.iscsi_cid_start] = ep; 522 if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start + 523 phba->params.cxns_per_ctrl * 2)) { 524 SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n"); 525 goto free_ep; 526 } 527 528 beiscsi_ep->cid_vld = 0; 529 nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev, 530 sizeof(struct tcp_connect_and_offload_in), 531 &nonemb_cmd.dma); 532 if (nonemb_cmd.va == NULL) { 533 SE_DEBUG(DBG_LVL_1, 534 "Failed to allocate memory for mgmt_open_connection" 535 "\n"); 536 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 537 return -ENOMEM; 538 } 539 nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in); 540 memset(nonemb_cmd.va, 0, nonemb_cmd.size); 541 tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd); 542 if (!tag) { 543 SE_DEBUG(DBG_LVL_1, 544 "mgmt_open_connection Failed for cid=%d\n", 545 beiscsi_ep->ep_cid); 546 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 547 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, 548 nonemb_cmd.va, nonemb_cmd.dma); 549 return -EAGAIN; 550 } else { 551 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 552 phba->ctrl.mcc_numtag[tag]); 553 } 554 wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; 555 extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; 556 status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; 557 if (status || extd_status) { 558 SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed" 559 " status = %d extd_status = %d\n", 560 status, extd_status); 561 free_mcc_tag(&phba->ctrl, tag); 562 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, 563 nonemb_cmd.va, nonemb_cmd.dma); 564 goto free_ep; 565 } else { 566 wrb = queue_get_wrb(mccq, wrb_num); 567 free_mcc_tag(&phba->ctrl, tag); 568 569 ptcpcnct_out = embedded_payload(wrb); 570 beiscsi_ep = ep->dd_data; 571 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle; 572 beiscsi_ep->cid_vld = 1; 573 SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n"); 574 } 575 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, 576 nonemb_cmd.va, nonemb_cmd.dma); 577 return 0; 578 579 free_ep: 580 beiscsi_free_ep(beiscsi_ep); 581 return -EBUSY; 582 } 583 584 /** 585 * beiscsi_ep_connect - Ask chip to create TCP Conn 586 * @scsi_host: Pointer to scsi_host structure 587 * @dst_addr: The IP address of Target 588 * @non_blocking: blocking or non-blocking call 589 * 590 * This routines first asks chip to create a connection and then allocates an EP 591 */ 592 struct iscsi_endpoint * 593 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 594 int non_blocking) 595 { 596 struct beiscsi_hba *phba; 597 struct beiscsi_endpoint *beiscsi_ep; 598 struct iscsi_endpoint *ep; 599 int ret; 600 601 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n"); 602 if (shost) 603 phba = iscsi_host_priv(shost); 604 else { 605 ret = -ENXIO; 606 SE_DEBUG(DBG_LVL_1, "shost is NULL\n"); 607 return ERR_PTR(ret); 608 } 609 610 if (phba->state != BE_ADAPTER_UP) { 611 ret = -EBUSY; 612 SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n"); 613 return ERR_PTR(ret); 614 } 615 616 ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint)); 617 if (!ep) { 618 ret = -ENOMEM; 619 return ERR_PTR(ret); 620 } 621 622 beiscsi_ep = ep->dd_data; 623 beiscsi_ep->phba = phba; 624 beiscsi_ep->openiscsi_ep = ep; 625 ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking); 626 if (ret) { 627 SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n"); 628 goto free_ep; 629 } 630 631 return ep; 632 633 free_ep: 634 iscsi_destroy_endpoint(ep); 635 return ERR_PTR(ret); 636 } 637 638 /** 639 * beiscsi_ep_poll - Poll to see if connection is established 640 * @ep: endpoint to be used 641 * @timeout_ms: timeout specified in millisecs 642 * 643 * Poll to see if TCP connection established 644 */ 645 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 646 { 647 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 648 649 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_poll\n"); 650 if (beiscsi_ep->cid_vld == 1) 651 return 1; 652 else 653 return 0; 654 } 655 656 /** 657 * beiscsi_close_conn - Upload the connection 658 * @ep: The iscsi endpoint 659 * @flag: The type of connection closure 660 */ 661 static int beiscsi_close_conn(struct beiscsi_endpoint *beiscsi_ep, int flag) 662 { 663 int ret = 0; 664 unsigned int tag; 665 struct beiscsi_hba *phba = beiscsi_ep->phba; 666 667 tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag); 668 if (!tag) { 669 SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n", 670 beiscsi_ep->ep_cid); 671 ret = -EAGAIN; 672 } else { 673 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 674 phba->ctrl.mcc_numtag[tag]); 675 free_mcc_tag(&phba->ctrl, tag); 676 } 677 return ret; 678 } 679 680 /** 681 * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table 682 * @phba: The phba instance 683 * @cid: The cid to free 684 */ 685 static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba, 686 unsigned int cid) 687 { 688 if (phba->conn_table[cid]) 689 phba->conn_table[cid] = NULL; 690 else { 691 SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n"); 692 return -EINVAL; 693 } 694 return 0; 695 } 696 697 /** 698 * beiscsi_ep_disconnect - Tears down the TCP connection 699 * @ep: endpoint to be used 700 * 701 * Tears down the TCP connection 702 */ 703 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) 704 { 705 struct beiscsi_conn *beiscsi_conn; 706 struct beiscsi_endpoint *beiscsi_ep; 707 struct beiscsi_hba *phba; 708 unsigned int tag; 709 unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH; 710 711 beiscsi_ep = ep->dd_data; 712 phba = beiscsi_ep->phba; 713 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n", 714 beiscsi_ep->ep_cid); 715 716 if (!beiscsi_ep->conn) { 717 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no " 718 "beiscsi_ep\n"); 719 return; 720 } 721 beiscsi_conn = beiscsi_ep->conn; 722 iscsi_suspend_queue(beiscsi_conn->conn); 723 724 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n", 725 beiscsi_ep->ep_cid); 726 727 tag = mgmt_invalidate_connection(phba, beiscsi_ep, 728 beiscsi_ep->ep_cid, 1, 729 savecfg_flag); 730 if (!tag) { 731 SE_DEBUG(DBG_LVL_1, 732 "mgmt_invalidate_connection Failed for cid=%d\n", 733 beiscsi_ep->ep_cid); 734 } else { 735 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 736 phba->ctrl.mcc_numtag[tag]); 737 free_mcc_tag(&phba->ctrl, tag); 738 } 739 740 beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL); 741 beiscsi_free_ep(beiscsi_ep); 742 beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid); 743 iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep); 744 } 745