1/** 2 * Copyright (C) 2005 - 2011 Emulex 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 (jayamohan.kallickal@emulex.com) 11 * 12 * Contact Information: 13 * linux-drivers@emulex.com 14 * 15 * Emulex 16 * 3333 Susan Street 17 * Costa Mesa, CA 92626 18 */ 19 20#include <scsi/libiscsi.h> 21#include <scsi/scsi_transport_iscsi.h> 22#include <scsi/scsi_transport.h> 23#include <scsi/scsi_cmnd.h> 24#include <scsi/scsi_device.h> 25#include <scsi/scsi_host.h> 26#include <scsi/scsi.h> 27 28#include "be_iscsi.h" 29 30extern struct iscsi_transport beiscsi_iscsi_transport; 31 32/** 33 * beiscsi_session_create - creates a new iscsi session 34 * @cmds_max: max commands supported 35 * @qdepth: max queue depth supported 36 * @initial_cmdsn: initial iscsi CMDSN 37 */ 38struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep, 39 u16 cmds_max, 40 u16 qdepth, 41 u32 initial_cmdsn) 42{ 43 struct Scsi_Host *shost; 44 struct beiscsi_endpoint *beiscsi_ep; 45 struct iscsi_cls_session *cls_session; 46 struct beiscsi_hba *phba; 47 struct iscsi_session *sess; 48 struct beiscsi_session *beiscsi_sess; 49 struct beiscsi_io_task *io_task; 50 51 SE_DEBUG(DBG_LVL_8, "In beiscsi_session_create\n"); 52 53 if (!ep) { 54 SE_DEBUG(DBG_LVL_1, "beiscsi_session_create: invalid ep\n"); 55 return NULL; 56 } 57 beiscsi_ep = ep->dd_data; 58 phba = beiscsi_ep->phba; 59 shost = phba->shost; 60 if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) { 61 shost_printk(KERN_ERR, shost, "Cannot handle %d cmds." 62 "Max cmds per session supported is %d. Using %d. " 63 "\n", cmds_max, 64 beiscsi_ep->phba->params.wrbs_per_cxn, 65 beiscsi_ep->phba->params.wrbs_per_cxn); 66 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn; 67 } 68 69 cls_session = iscsi_session_setup(&beiscsi_iscsi_transport, 70 shost, cmds_max, 71 sizeof(*beiscsi_sess), 72 sizeof(*io_task), 73 initial_cmdsn, ISCSI_MAX_TARGET); 74 if (!cls_session) 75 return NULL; 76 sess = cls_session->dd_data; 77 beiscsi_sess = sess->dd_data; 78 beiscsi_sess->bhs_pool = pci_pool_create("beiscsi_bhs_pool", 79 phba->pcidev, 80 sizeof(struct be_cmd_bhs), 81 64, 0); 82 if (!beiscsi_sess->bhs_pool) 83 goto destroy_sess; 84 85 return cls_session; 86destroy_sess: 87 iscsi_session_teardown(cls_session); 88 return NULL; 89} 90 91/** 92 * beiscsi_session_destroy - destroys iscsi session 93 * @cls_session: pointer to iscsi cls session 94 * 95 * Destroys iSCSI session instance and releases 96 * resources allocated for it. 97 */ 98void beiscsi_session_destroy(struct iscsi_cls_session *cls_session) 99{ 100 struct iscsi_session *sess = cls_session->dd_data; 101 struct beiscsi_session *beiscsi_sess = sess->dd_data; 102 103 SE_DEBUG(DBG_LVL_8, "In beiscsi_session_destroy\n"); 104 pci_pool_destroy(beiscsi_sess->bhs_pool); 105 iscsi_session_teardown(cls_session); 106} 107 108/** 109 * beiscsi_conn_create - create an instance of iscsi connection 110 * @cls_session: ptr to iscsi_cls_session 111 * @cid: iscsi cid 112 */ 113struct iscsi_cls_conn * 114beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid) 115{ 116 struct beiscsi_hba *phba; 117 struct Scsi_Host *shost; 118 struct iscsi_cls_conn *cls_conn; 119 struct beiscsi_conn *beiscsi_conn; 120 struct iscsi_conn *conn; 121 struct iscsi_session *sess; 122 struct beiscsi_session *beiscsi_sess; 123 124 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid" 125 "from iscsi layer=%d\n", cid); 126 shost = iscsi_session_to_shost(cls_session); 127 phba = iscsi_host_priv(shost); 128 129 cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid); 130 if (!cls_conn) 131 return NULL; 132 133 conn = cls_conn->dd_data; 134 beiscsi_conn = conn->dd_data; 135 beiscsi_conn->ep = NULL; 136 beiscsi_conn->phba = phba; 137 beiscsi_conn->conn = conn; 138 sess = cls_session->dd_data; 139 beiscsi_sess = sess->dd_data; 140 beiscsi_conn->beiscsi_sess = beiscsi_sess; 141 return cls_conn; 142} 143 144/** 145 * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table 146 * @beiscsi_conn: The pointer to beiscsi_conn structure 147 * @phba: The phba instance 148 * @cid: The cid to free 149 */ 150static int beiscsi_bindconn_cid(struct beiscsi_hba *phba, 151 struct beiscsi_conn *beiscsi_conn, 152 unsigned int cid) 153{ 154 if (phba->conn_table[cid]) { 155 SE_DEBUG(DBG_LVL_1, 156 "Connection table already occupied. Detected clash\n"); 157 return -EINVAL; 158 } else { 159 SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn)\n", 160 cid, beiscsi_conn); 161 phba->conn_table[cid] = beiscsi_conn; 162 } 163 return 0; 164} 165 166/** 167 * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection 168 * @cls_session: pointer to iscsi cls session 169 * @cls_conn: pointer to iscsi cls conn 170 * @transport_fd: EP handle(64 bit) 171 * 172 * This function binds the TCP Conn with iSCSI Connection and Session. 173 */ 174int beiscsi_conn_bind(struct iscsi_cls_session *cls_session, 175 struct iscsi_cls_conn *cls_conn, 176 u64 transport_fd, int is_leading) 177{ 178 struct iscsi_conn *conn = cls_conn->dd_data; 179 struct beiscsi_conn *beiscsi_conn = conn->dd_data; 180 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 181 struct beiscsi_hba *phba = iscsi_host_priv(shost); 182 struct beiscsi_endpoint *beiscsi_ep; 183 struct iscsi_endpoint *ep; 184 185 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n"); 186 ep = iscsi_lookup_endpoint(transport_fd); 187 if (!ep) 188 return -EINVAL; 189 190 beiscsi_ep = ep->dd_data; 191 192 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) 193 return -EINVAL; 194 195 if (beiscsi_ep->phba != phba) { 196 SE_DEBUG(DBG_LVL_8, 197 "beiscsi_ep->hba=%p not equal to phba=%p\n", 198 beiscsi_ep->phba, phba); 199 return -EEXIST; 200 } 201 202 beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid; 203 beiscsi_conn->ep = beiscsi_ep; 204 beiscsi_ep->conn = beiscsi_conn; 205 SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d\n", 206 beiscsi_conn, conn, beiscsi_ep->ep_cid); 207 return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid); 208} 209 210/** 211 * beiscsi_ep_get_param - get the iscsi parameter 212 * @ep: pointer to iscsi ep 213 * @param: parameter type identifier 214 * @buf: buffer pointer 215 * 216 * returns iscsi parameter 217 */ 218int beiscsi_ep_get_param(struct iscsi_endpoint *ep, 219 enum iscsi_param param, char *buf) 220{ 221 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 222 int len = 0; 223 224 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param); 225 226 switch (param) { 227 case ISCSI_PARAM_CONN_PORT: 228 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport); 229 break; 230 case ISCSI_PARAM_CONN_ADDRESS: 231 if (beiscsi_ep->ip_type == BE2_IPV4) 232 len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr); 233 else 234 len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr); 235 break; 236 default: 237 return -ENOSYS; 238 } 239 return len; 240} 241 242int beiscsi_set_param(struct iscsi_cls_conn *cls_conn, 243 enum iscsi_param param, char *buf, int buflen) 244{ 245 struct iscsi_conn *conn = cls_conn->dd_data; 246 struct iscsi_session *session = conn->session; 247 int ret; 248 249 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param); 250 ret = iscsi_set_param(cls_conn, param, buf, buflen); 251 if (ret) 252 return ret; 253 /* 254 * If userspace tried to set the value to higher than we can 255 * support override here. 256 */ 257 switch (param) { 258 case ISCSI_PARAM_FIRST_BURST: 259 if (session->first_burst > 8192) 260 session->first_burst = 8192; 261 break; 262 case ISCSI_PARAM_MAX_RECV_DLENGTH: 263 if (conn->max_recv_dlength > 65536) 264 conn->max_recv_dlength = 65536; 265 break; 266 case ISCSI_PARAM_MAX_BURST: 267 if (session->max_burst > 262144) 268 session->max_burst = 262144; 269 break; 270 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 271 if ((conn->max_xmit_dlength > 65536) || 272 (conn->max_xmit_dlength == 0)) 273 conn->max_xmit_dlength = 65536; 274 default: 275 return 0; 276 } 277 278 return 0; 279} 280 281/** 282 * beiscsi_get_host_param - get the iscsi parameter 283 * @shost: pointer to scsi_host structure 284 * @param: parameter type identifier 285 * @buf: buffer pointer 286 * 287 * returns host parameter 288 */ 289int beiscsi_get_host_param(struct Scsi_Host *shost, 290 enum iscsi_host_param param, char *buf) 291{ 292 struct beiscsi_hba *phba = iscsi_host_priv(shost); 293 int status = 0; 294 295 SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param); 296 switch (param) { 297 case ISCSI_HOST_PARAM_HWADDRESS: 298 status = beiscsi_get_macaddr(buf, phba); 299 if (status < 0) { 300 SE_DEBUG(DBG_LVL_1, "beiscsi_get_macaddr Failed\n"); 301 return status; 302 } 303 break; 304 default: 305 return iscsi_host_get_param(shost, param, buf); 306 } 307 return status; 308} 309 310int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba) 311{ 312 struct be_cmd_resp_get_mac_addr *resp; 313 struct be_mcc_wrb *wrb; 314 unsigned int tag, wrb_num; 315 unsigned short status, extd_status; 316 struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; 317 int rc; 318 319 if (phba->read_mac_address) 320 return sysfs_format_mac(buf, phba->mac_address, 321 ETH_ALEN); 322 323 tag = be_cmd_get_mac_addr(phba); 324 if (!tag) { 325 SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n"); 326 return -EBUSY; 327 } else 328 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 329 phba->ctrl.mcc_numtag[tag]); 330 331 wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; 332 extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; 333 status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; 334 if (status || extd_status) { 335 SE_DEBUG(DBG_LVL_1, "Failed to get be_cmd_get_mac_addr" 336 " status = %d extd_status = %d\n", 337 status, extd_status); 338 free_mcc_tag(&phba->ctrl, tag); 339 return -EAGAIN; 340 } 341 wrb = queue_get_wrb(mccq, wrb_num); 342 free_mcc_tag(&phba->ctrl, tag); 343 resp = embedded_payload(wrb); 344 memcpy(phba->mac_address, resp->mac_address, ETH_ALEN); 345 rc = sysfs_format_mac(buf, phba->mac_address, 346 ETH_ALEN); 347 phba->read_mac_address = 1; 348 return rc; 349} 350 351 352/** 353 * beiscsi_conn_get_stats - get the iscsi stats 354 * @cls_conn: pointer to iscsi cls conn 355 * @stats: pointer to iscsi_stats structure 356 * 357 * returns iscsi stats 358 */ 359void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 360 struct iscsi_stats *stats) 361{ 362 struct iscsi_conn *conn = cls_conn->dd_data; 363 364 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n"); 365 stats->txdata_octets = conn->txdata_octets; 366 stats->rxdata_octets = conn->rxdata_octets; 367 stats->dataout_pdus = conn->dataout_pdus_cnt; 368 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 369 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 370 stats->datain_pdus = conn->datain_pdus_cnt; 371 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 372 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 373 stats->r2t_pdus = conn->r2t_pdus_cnt; 374 stats->digest_err = 0; 375 stats->timeout_err = 0; 376 stats->custom_length = 0; 377 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 378 stats->custom[0].value = conn->eh_abort_cnt; 379} 380 381/** 382 * beiscsi_set_params_for_offld - get the parameters for offload 383 * @beiscsi_conn: pointer to beiscsi_conn 384 * @params: pointer to offload_params structure 385 */ 386static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn, 387 struct beiscsi_offload_params *params) 388{ 389 struct iscsi_conn *conn = beiscsi_conn->conn; 390 struct iscsi_session *session = conn->session; 391 392 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length, 393 params, session->max_burst); 394 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 395 max_send_data_segment_length, params, 396 conn->max_xmit_dlength); 397 AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length, 398 params, session->first_burst); 399 AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params, 400 session->erl); 401 AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params, 402 conn->datadgst_en); 403 AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params, 404 conn->hdrdgst_en); 405 AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params, 406 session->initial_r2t_en); 407 AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params, 408 session->imm_data_en); 409 AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params, 410 (conn->exp_statsn - 1)); 411} 412 413/** 414 * beiscsi_conn_start - offload of session to chip 415 * @cls_conn: pointer to beiscsi_conn 416 */ 417int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) 418{ 419 struct iscsi_conn *conn = cls_conn->dd_data; 420 struct beiscsi_conn *beiscsi_conn = conn->dd_data; 421 struct beiscsi_endpoint *beiscsi_ep; 422 struct beiscsi_offload_params params; 423 424 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n"); 425 memset(¶ms, 0, sizeof(struct beiscsi_offload_params)); 426 beiscsi_ep = beiscsi_conn->ep; 427 if (!beiscsi_ep) 428 SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n"); 429 430 beiscsi_conn->login_in_progress = 0; 431 beiscsi_set_params_for_offld(beiscsi_conn, ¶ms); 432 beiscsi_offload_connection(beiscsi_conn, ¶ms); 433 iscsi_conn_start(cls_conn); 434 return 0; 435} 436 437/** 438 * beiscsi_get_cid - Allocate a cid 439 * @phba: The phba instance 440 */ 441static int beiscsi_get_cid(struct beiscsi_hba *phba) 442{ 443 unsigned short cid = 0xFFFF; 444 445 if (!phba->avlbl_cids) 446 return cid; 447 448 cid = phba->cid_array[phba->cid_alloc++]; 449 if (phba->cid_alloc == phba->params.cxns_per_ctrl) 450 phba->cid_alloc = 0; 451 phba->avlbl_cids--; 452 return cid; 453} 454 455/** 456 * beiscsi_put_cid - Free the cid 457 * @phba: The phba for which the cid is being freed 458 * @cid: The cid to free 459 */ 460static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) 461{ 462 phba->avlbl_cids++; 463 phba->cid_array[phba->cid_free++] = cid; 464 if (phba->cid_free == phba->params.cxns_per_ctrl) 465 phba->cid_free = 0; 466} 467 468/** 469 * beiscsi_free_ep - free endpoint 470 * @ep: pointer to iscsi endpoint structure 471 */ 472static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) 473{ 474 struct beiscsi_hba *phba = beiscsi_ep->phba; 475 476 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 477 beiscsi_ep->phba = NULL; 478} 479 480/** 481 * beiscsi_open_conn - Ask FW to open a TCP connection 482 * @ep: endpoint to be used 483 * @src_addr: The source IP address 484 * @dst_addr: The Destination IP address 485 * 486 * Asks the FW to open a TCP connection 487 */ 488static int beiscsi_open_conn(struct iscsi_endpoint *ep, 489 struct sockaddr *src_addr, 490 struct sockaddr *dst_addr, int non_blocking) 491{ 492 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 493 struct beiscsi_hba *phba = beiscsi_ep->phba; 494 struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q; 495 struct be_mcc_wrb *wrb; 496 struct tcp_connect_and_offload_out *ptcpcnct_out; 497 unsigned short status, extd_status; 498 struct be_dma_mem nonemb_cmd; 499 unsigned int tag, wrb_num; 500 int ret = -ENOMEM; 501 502 SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n"); 503 beiscsi_ep->ep_cid = beiscsi_get_cid(phba); 504 if (beiscsi_ep->ep_cid == 0xFFFF) { 505 SE_DEBUG(DBG_LVL_1, "No free cid available\n"); 506 return ret; 507 } 508 SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d\n", 509 beiscsi_ep->ep_cid); 510 phba->ep_array[beiscsi_ep->ep_cid - 511 phba->fw_config.iscsi_cid_start] = ep; 512 if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start + 513 phba->params.cxns_per_ctrl * 2)) { 514 SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n"); 515 goto free_ep; 516 } 517 518 beiscsi_ep->cid_vld = 0; 519 nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev, 520 sizeof(struct tcp_connect_and_offload_in), 521 &nonemb_cmd.dma); 522 if (nonemb_cmd.va == NULL) { 523 SE_DEBUG(DBG_LVL_1, 524 "Failed to allocate memory for mgmt_open_connection" 525 "\n"); 526 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 527 return -ENOMEM; 528 } 529 nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in); 530 memset(nonemb_cmd.va, 0, nonemb_cmd.size); 531 tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd); 532 if (!tag) { 533 SE_DEBUG(DBG_LVL_1, 534 "mgmt_open_connection Failed for cid=%d\n", 535 beiscsi_ep->ep_cid); 536 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 537 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, 538 nonemb_cmd.va, nonemb_cmd.dma); 539 return -EAGAIN; 540 } else { 541 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 542 phba->ctrl.mcc_numtag[tag]); 543 } 544 wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; 545 extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; 546 status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; 547 if (status || extd_status) { 548 SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed" 549 " status = %d extd_status = %d\n", 550 status, extd_status); 551 free_mcc_tag(&phba->ctrl, tag); 552 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, 553 nonemb_cmd.va, nonemb_cmd.dma); 554 goto free_ep; 555 } else { 556 wrb = queue_get_wrb(mccq, wrb_num); 557 free_mcc_tag(&phba->ctrl, tag); 558 559 ptcpcnct_out = embedded_payload(wrb); 560 beiscsi_ep = ep->dd_data; 561 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle; 562 beiscsi_ep->cid_vld = 1; 563 SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n"); 564 } 565 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, 566 nonemb_cmd.va, nonemb_cmd.dma); 567 return 0; 568 569free_ep: 570 beiscsi_free_ep(beiscsi_ep); 571 return -EBUSY; 572} 573 574/** 575 * beiscsi_ep_connect - Ask chip to create TCP Conn 576 * @scsi_host: Pointer to scsi_host structure 577 * @dst_addr: The IP address of Target 578 * @non_blocking: blocking or non-blocking call 579 * 580 * This routines first asks chip to create a connection and then allocates an EP 581 */ 582struct iscsi_endpoint * 583beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 584 int non_blocking) 585{ 586 struct beiscsi_hba *phba; 587 struct beiscsi_endpoint *beiscsi_ep; 588 struct iscsi_endpoint *ep; 589 int ret; 590 591 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n"); 592 if (shost) 593 phba = iscsi_host_priv(shost); 594 else { 595 ret = -ENXIO; 596 SE_DEBUG(DBG_LVL_1, "shost is NULL\n"); 597 return ERR_PTR(ret); 598 } 599 600 if (phba->state != BE_ADAPTER_UP) { 601 ret = -EBUSY; 602 SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n"); 603 return ERR_PTR(ret); 604 } 605 606 ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint)); 607 if (!ep) { 608 ret = -ENOMEM; 609 return ERR_PTR(ret); 610 } 611 612 beiscsi_ep = ep->dd_data; 613 beiscsi_ep->phba = phba; 614 beiscsi_ep->openiscsi_ep = ep; 615 ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking); 616 if (ret) { 617 SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n"); 618 goto free_ep; 619 } 620 621 return ep; 622 623free_ep: 624 iscsi_destroy_endpoint(ep); 625 return ERR_PTR(ret); 626} 627 628/** 629 * beiscsi_ep_poll - Poll to see if connection is established 630 * @ep: endpoint to be used 631 * @timeout_ms: timeout specified in millisecs 632 * 633 * Poll to see if TCP connection established 634 */ 635int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 636{ 637 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 638 639 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_poll\n"); 640 if (beiscsi_ep->cid_vld == 1) 641 return 1; 642 else 643 return 0; 644} 645 646/** 647 * beiscsi_close_conn - Upload the connection 648 * @ep: The iscsi endpoint 649 * @flag: The type of connection closure 650 */ 651static int beiscsi_close_conn(struct beiscsi_endpoint *beiscsi_ep, int flag) 652{ 653 int ret = 0; 654 unsigned int tag; 655 struct beiscsi_hba *phba = beiscsi_ep->phba; 656 657 tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag); 658 if (!tag) { 659 SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n", 660 beiscsi_ep->ep_cid); 661 ret = -EAGAIN; 662 } else { 663 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 664 phba->ctrl.mcc_numtag[tag]); 665 free_mcc_tag(&phba->ctrl, tag); 666 } 667 return ret; 668} 669 670/** 671 * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table 672 * @phba: The phba instance 673 * @cid: The cid to free 674 */ 675static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba, 676 unsigned int cid) 677{ 678 if (phba->conn_table[cid]) 679 phba->conn_table[cid] = NULL; 680 else { 681 SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n"); 682 return -EINVAL; 683 } 684 return 0; 685} 686 687/** 688 * beiscsi_ep_disconnect - Tears down the TCP connection 689 * @ep: endpoint to be used 690 * 691 * Tears down the TCP connection 692 */ 693void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) 694{ 695 struct beiscsi_conn *beiscsi_conn; 696 struct beiscsi_endpoint *beiscsi_ep; 697 struct beiscsi_hba *phba; 698 unsigned int tag; 699 unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH; 700 701 beiscsi_ep = ep->dd_data; 702 phba = beiscsi_ep->phba; 703 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n", 704 beiscsi_ep->ep_cid); 705 706 if (!beiscsi_ep->conn) { 707 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no " 708 "beiscsi_ep\n"); 709 return; 710 } 711 beiscsi_conn = beiscsi_ep->conn; 712 iscsi_suspend_queue(beiscsi_conn->conn); 713 714 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n", 715 beiscsi_ep->ep_cid); 716 717 tag = mgmt_invalidate_connection(phba, beiscsi_ep, 718 beiscsi_ep->ep_cid, 1, 719 savecfg_flag); 720 if (!tag) { 721 SE_DEBUG(DBG_LVL_1, 722 "mgmt_invalidate_connection Failed for cid=%d\n", 723 beiscsi_ep->ep_cid); 724 } else { 725 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 726 phba->ctrl.mcc_numtag[tag]); 727 free_mcc_tag(&phba->ctrl, tag); 728 } 729 730 beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL); 731 beiscsi_free_ep(beiscsi_ep); 732 beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid); 733 iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep); 734} 735 736umode_t be2iscsi_attr_is_visible(int param_type, int param) 737{ 738 switch (param_type) { 739 case ISCSI_HOST_PARAM: 740 switch (param) { 741 case ISCSI_HOST_PARAM_HWADDRESS: 742 case ISCSI_HOST_PARAM_IPADDRESS: 743 case ISCSI_HOST_PARAM_INITIATOR_NAME: 744 return S_IRUGO; 745 default: 746 return 0; 747 } 748 case ISCSI_PARAM: 749 switch (param) { 750 case ISCSI_PARAM_MAX_RECV_DLENGTH: 751 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 752 case ISCSI_PARAM_HDRDGST_EN: 753 case ISCSI_PARAM_DATADGST_EN: 754 case ISCSI_PARAM_CONN_ADDRESS: 755 case ISCSI_PARAM_CONN_PORT: 756 case ISCSI_PARAM_EXP_STATSN: 757 case ISCSI_PARAM_PERSISTENT_ADDRESS: 758 case ISCSI_PARAM_PERSISTENT_PORT: 759 case ISCSI_PARAM_PING_TMO: 760 case ISCSI_PARAM_RECV_TMO: 761 case ISCSI_PARAM_INITIAL_R2T_EN: 762 case ISCSI_PARAM_MAX_R2T: 763 case ISCSI_PARAM_IMM_DATA_EN: 764 case ISCSI_PARAM_FIRST_BURST: 765 case ISCSI_PARAM_MAX_BURST: 766 case ISCSI_PARAM_PDU_INORDER_EN: 767 case ISCSI_PARAM_DATASEQ_INORDER_EN: 768 case ISCSI_PARAM_ERL: 769 case ISCSI_PARAM_TARGET_NAME: 770 case ISCSI_PARAM_TPGT: 771 case ISCSI_PARAM_USERNAME: 772 case ISCSI_PARAM_PASSWORD: 773 case ISCSI_PARAM_USERNAME_IN: 774 case ISCSI_PARAM_PASSWORD_IN: 775 case ISCSI_PARAM_FAST_ABORT: 776 case ISCSI_PARAM_ABORT_TMO: 777 case ISCSI_PARAM_LU_RESET_TMO: 778 case ISCSI_PARAM_IFACE_NAME: 779 case ISCSI_PARAM_INITIATOR_NAME: 780 return S_IRUGO; 781 default: 782 return 0; 783 } 784 } 785 786 return 0; 787} 788