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 31extern 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 */ 39struct 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; 87destroy_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 */ 99void 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 */ 114struct iscsi_cls_conn * 115beiscsi_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 */ 151static 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 */ 175int 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 */ 220int 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 252int 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 */ 299int 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 320int 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 */ 369void 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 */ 396static 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 */ 427int 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 */ 451static 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 */ 470static 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 */ 482static 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 */ 498static 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 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 526 goto free_ep; 527 } 528 529 beiscsi_ep->cid_vld = 0; 530 nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev, 531 sizeof(struct tcp_connect_and_offload_in), 532 &nonemb_cmd.dma); 533 if (nonemb_cmd.va == NULL) { 534 SE_DEBUG(DBG_LVL_1, 535 "Failed to allocate memory for mgmt_open_connection" 536 "\n"); 537 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 538 return -ENOMEM; 539 } 540 nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in); 541 memset(nonemb_cmd.va, 0, nonemb_cmd.size); 542 tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd); 543 if (!tag) { 544 SE_DEBUG(DBG_LVL_1, 545 "mgmt_open_connection Failed for cid=%d\n", 546 beiscsi_ep->ep_cid); 547 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 548 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, 549 nonemb_cmd.va, nonemb_cmd.dma); 550 return -EAGAIN; 551 } else { 552 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 553 phba->ctrl.mcc_numtag[tag]); 554 } 555 wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16; 556 extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8; 557 status = phba->ctrl.mcc_numtag[tag] & 0x000000FF; 558 if (status || extd_status) { 559 SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed" 560 " status = %d extd_status = %d\n", 561 status, extd_status); 562 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 563 free_mcc_tag(&phba->ctrl, tag); 564 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, 565 nonemb_cmd.va, nonemb_cmd.dma); 566 goto free_ep; 567 } else { 568 wrb = queue_get_wrb(mccq, wrb_num); 569 free_mcc_tag(&phba->ctrl, tag); 570 571 ptcpcnct_out = embedded_payload(wrb); 572 beiscsi_ep = ep->dd_data; 573 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle; 574 beiscsi_ep->cid_vld = 1; 575 SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n"); 576 } 577 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 578 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size, 579 nonemb_cmd.va, nonemb_cmd.dma); 580 return 0; 581 582free_ep: 583 beiscsi_free_ep(beiscsi_ep); 584 return -EBUSY; 585} 586 587/** 588 * beiscsi_ep_connect - Ask chip to create TCP Conn 589 * @scsi_host: Pointer to scsi_host structure 590 * @dst_addr: The IP address of Target 591 * @non_blocking: blocking or non-blocking call 592 * 593 * This routines first asks chip to create a connection and then allocates an EP 594 */ 595struct iscsi_endpoint * 596beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 597 int non_blocking) 598{ 599 struct beiscsi_hba *phba; 600 struct beiscsi_endpoint *beiscsi_ep; 601 struct iscsi_endpoint *ep; 602 int ret; 603 604 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n"); 605 if (shost) 606 phba = iscsi_host_priv(shost); 607 else { 608 ret = -ENXIO; 609 SE_DEBUG(DBG_LVL_1, "shost is NULL\n"); 610 return ERR_PTR(ret); 611 } 612 613 if (phba->state != BE_ADAPTER_UP) { 614 ret = -EBUSY; 615 SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n"); 616 return ERR_PTR(ret); 617 } 618 619 ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint)); 620 if (!ep) { 621 ret = -ENOMEM; 622 return ERR_PTR(ret); 623 } 624 625 beiscsi_ep = ep->dd_data; 626 beiscsi_ep->phba = phba; 627 beiscsi_ep->openiscsi_ep = ep; 628 ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking); 629 if (ret) { 630 SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n"); 631 goto free_ep; 632 } 633 634 return ep; 635 636free_ep: 637 iscsi_destroy_endpoint(ep); 638 return ERR_PTR(ret); 639} 640 641/** 642 * beiscsi_ep_poll - Poll to see if connection is established 643 * @ep: endpoint to be used 644 * @timeout_ms: timeout specified in millisecs 645 * 646 * Poll to see if TCP connection established 647 */ 648int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 649{ 650 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 651 652 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_poll\n"); 653 if (beiscsi_ep->cid_vld == 1) 654 return 1; 655 else 656 return 0; 657} 658 659/** 660 * beiscsi_close_conn - Upload the connection 661 * @ep: The iscsi endpoint 662 * @flag: The type of connection closure 663 */ 664static int beiscsi_close_conn(struct beiscsi_endpoint *beiscsi_ep, int flag) 665{ 666 int ret = 0; 667 unsigned int tag; 668 struct beiscsi_hba *phba = beiscsi_ep->phba; 669 670 tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag); 671 if (!tag) { 672 SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n", 673 beiscsi_ep->ep_cid); 674 ret = -EAGAIN; 675 } else { 676 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 677 phba->ctrl.mcc_numtag[tag]); 678 free_mcc_tag(&phba->ctrl, tag); 679 } 680 return ret; 681} 682 683/** 684 * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table 685 * @phba: The phba instance 686 * @cid: The cid to free 687 */ 688static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba, 689 unsigned int cid) 690{ 691 if (phba->conn_table[cid]) 692 phba->conn_table[cid] = NULL; 693 else { 694 SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n"); 695 return -EINVAL; 696 } 697 return 0; 698} 699 700/** 701 * beiscsi_ep_disconnect - Tears down the TCP connection 702 * @ep: endpoint to be used 703 * 704 * Tears down the TCP connection 705 */ 706void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) 707{ 708 struct beiscsi_conn *beiscsi_conn; 709 struct beiscsi_endpoint *beiscsi_ep; 710 struct beiscsi_hba *phba; 711 unsigned int tag; 712 unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH; 713 714 beiscsi_ep = ep->dd_data; 715 phba = beiscsi_ep->phba; 716 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n", 717 beiscsi_ep->ep_cid); 718 719 if (!beiscsi_ep->conn) { 720 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no " 721 "beiscsi_ep\n"); 722 return; 723 } 724 beiscsi_conn = beiscsi_ep->conn; 725 iscsi_suspend_queue(beiscsi_conn->conn); 726 727 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n", 728 beiscsi_ep->ep_cid); 729 730 tag = mgmt_invalidate_connection(phba, beiscsi_ep, 731 beiscsi_ep->ep_cid, 1, 732 savecfg_flag); 733 if (!tag) { 734 SE_DEBUG(DBG_LVL_1, 735 "mgmt_invalidate_connection Failed for cid=%d\n", 736 beiscsi_ep->ep_cid); 737 } else { 738 wait_event_interruptible(phba->ctrl.mcc_wait[tag], 739 phba->ctrl.mcc_numtag[tag]); 740 free_mcc_tag(&phba->ctrl, tag); 741 } 742 743 beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL); 744 beiscsi_free_ep(beiscsi_ep); 745 beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid); 746 iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep); 747} 748