1 /* 2 * This file is part of the Emulex Linux Device Driver for Enterprise iSCSI 3 * Host Bus Adapters. Refer to the README file included with this package 4 * for driver version and adapter compatibility. 5 * 6 * Copyright (c) 2018 Broadcom. All Rights Reserved. 7 * The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries. 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of version 2 of the GNU General Public License as published 11 * by the Free Software Foundation. 12 * 13 * Contact Information: 14 * linux-drivers@broadcom.com 15 * 16 */ 17 18 #include <scsi/libiscsi.h> 19 #include <scsi/scsi_transport_iscsi.h> 20 #include <scsi/scsi_transport.h> 21 #include <scsi/scsi_cmnd.h> 22 #include <scsi/scsi_device.h> 23 #include <scsi/scsi_host.h> 24 #include <scsi/scsi_netlink.h> 25 #include <net/netlink.h> 26 #include <scsi/scsi.h> 27 28 #include "be_iscsi.h" 29 30 extern 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 */ 38 struct 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 52 if (!ep) { 53 pr_err("beiscsi_session_create: invalid ep\n"); 54 return NULL; 55 } 56 beiscsi_ep = ep->dd_data; 57 phba = beiscsi_ep->phba; 58 59 if (!beiscsi_hba_is_online(phba)) { 60 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 61 "BS_%d : HBA in error 0x%lx\n", phba->state); 62 return NULL; 63 } 64 65 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 66 "BS_%d : In beiscsi_session_create\n"); 67 if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) { 68 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 69 "BS_%d : Cannot handle %d cmds." 70 "Max cmds per session supported is %d. Using %d." 71 "\n", cmds_max, 72 beiscsi_ep->phba->params.wrbs_per_cxn, 73 beiscsi_ep->phba->params.wrbs_per_cxn); 74 75 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn; 76 } 77 78 shost = phba->shost; 79 cls_session = iscsi_session_setup(&beiscsi_iscsi_transport, 80 shost, cmds_max, 81 sizeof(*beiscsi_sess), 82 sizeof(*io_task), 83 initial_cmdsn, ISCSI_MAX_TARGET); 84 if (!cls_session) 85 return NULL; 86 sess = cls_session->dd_data; 87 beiscsi_sess = sess->dd_data; 88 beiscsi_sess->bhs_pool = dma_pool_create("beiscsi_bhs_pool", 89 &phba->pcidev->dev, 90 sizeof(struct be_cmd_bhs), 91 64, 0); 92 if (!beiscsi_sess->bhs_pool) 93 goto destroy_sess; 94 95 return cls_session; 96 destroy_sess: 97 iscsi_session_teardown(cls_session); 98 return NULL; 99 } 100 101 /** 102 * beiscsi_session_destroy - destroys iscsi session 103 * @cls_session: pointer to iscsi cls session 104 * 105 * Destroys iSCSI session instance and releases 106 * resources allocated for it. 107 */ 108 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session) 109 { 110 struct iscsi_session *sess = cls_session->dd_data; 111 struct beiscsi_session *beiscsi_sess = sess->dd_data; 112 113 printk(KERN_INFO "In beiscsi_session_destroy\n"); 114 dma_pool_destroy(beiscsi_sess->bhs_pool); 115 iscsi_session_teardown(cls_session); 116 } 117 118 /** 119 * beiscsi_session_fail(): Closing session with appropriate error 120 * @cls_session: ptr to session 121 **/ 122 void beiscsi_session_fail(struct iscsi_cls_session *cls_session) 123 { 124 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED); 125 } 126 127 128 /** 129 * beiscsi_conn_create - create an instance of iscsi connection 130 * @cls_session: ptr to iscsi_cls_session 131 * @cid: iscsi cid 132 */ 133 struct iscsi_cls_conn * 134 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid) 135 { 136 struct beiscsi_hba *phba; 137 struct Scsi_Host *shost; 138 struct iscsi_cls_conn *cls_conn; 139 struct beiscsi_conn *beiscsi_conn; 140 struct iscsi_conn *conn; 141 struct iscsi_session *sess; 142 struct beiscsi_session *beiscsi_sess; 143 144 shost = iscsi_session_to_shost(cls_session); 145 phba = iscsi_host_priv(shost); 146 147 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 148 "BS_%d : In beiscsi_conn_create ,cid" 149 "from iscsi layer=%d\n", cid); 150 151 cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid); 152 if (!cls_conn) 153 return NULL; 154 155 conn = cls_conn->dd_data; 156 beiscsi_conn = conn->dd_data; 157 beiscsi_conn->ep = NULL; 158 beiscsi_conn->phba = phba; 159 beiscsi_conn->conn = conn; 160 sess = cls_session->dd_data; 161 beiscsi_sess = sess->dd_data; 162 beiscsi_conn->beiscsi_sess = beiscsi_sess; 163 return cls_conn; 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 */ 174 int 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 hwi_controller *phwi_ctrlr = phba->phwi_ctrlr; 183 struct hwi_wrb_context *pwrb_context; 184 struct beiscsi_endpoint *beiscsi_ep; 185 struct iscsi_endpoint *ep; 186 uint16_t cri_index; 187 188 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 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 199 "BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n", 200 beiscsi_ep->phba, phba); 201 202 return -EEXIST; 203 } 204 cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid); 205 if (phba->conn_table[cri_index]) { 206 if (beiscsi_conn != phba->conn_table[cri_index] || 207 beiscsi_ep != phba->conn_table[cri_index]->ep) { 208 __beiscsi_log(phba, KERN_ERR, 209 "BS_%d : conn_table not empty at %u: cid %u conn %p:%p\n", 210 cri_index, 211 beiscsi_ep->ep_cid, 212 beiscsi_conn, 213 phba->conn_table[cri_index]); 214 return -EINVAL; 215 } 216 } 217 218 beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid; 219 beiscsi_conn->ep = beiscsi_ep; 220 beiscsi_ep->conn = beiscsi_conn; 221 /** 222 * Each connection is associated with a WRBQ kept in wrb_context. 223 * Store doorbell offset for transmit path. 224 */ 225 pwrb_context = &phwi_ctrlr->wrb_context[cri_index]; 226 beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset; 227 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 228 "BS_%d : cid %d phba->conn_table[%u]=%p\n", 229 beiscsi_ep->ep_cid, cri_index, beiscsi_conn); 230 phba->conn_table[cri_index] = beiscsi_conn; 231 return 0; 232 } 233 234 static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba) 235 { 236 if (phba->ipv4_iface) 237 return 0; 238 239 phba->ipv4_iface = iscsi_create_iface(phba->shost, 240 &beiscsi_iscsi_transport, 241 ISCSI_IFACE_TYPE_IPV4, 242 0, 0); 243 if (!phba->ipv4_iface) { 244 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 245 "BS_%d : Could not " 246 "create default IPv4 address.\n"); 247 return -ENODEV; 248 } 249 250 return 0; 251 } 252 253 static int beiscsi_iface_create_ipv6(struct beiscsi_hba *phba) 254 { 255 if (phba->ipv6_iface) 256 return 0; 257 258 phba->ipv6_iface = iscsi_create_iface(phba->shost, 259 &beiscsi_iscsi_transport, 260 ISCSI_IFACE_TYPE_IPV6, 261 0, 0); 262 if (!phba->ipv6_iface) { 263 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 264 "BS_%d : Could not " 265 "create default IPv6 address.\n"); 266 return -ENODEV; 267 } 268 269 return 0; 270 } 271 272 void beiscsi_iface_create_default(struct beiscsi_hba *phba) 273 { 274 struct be_cmd_get_if_info_resp *if_info; 275 276 if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) { 277 beiscsi_iface_create_ipv4(phba); 278 kfree(if_info); 279 } 280 281 if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) { 282 beiscsi_iface_create_ipv6(phba); 283 kfree(if_info); 284 } 285 } 286 287 void beiscsi_iface_destroy_default(struct beiscsi_hba *phba) 288 { 289 if (phba->ipv6_iface) { 290 iscsi_destroy_iface(phba->ipv6_iface); 291 phba->ipv6_iface = NULL; 292 } 293 if (phba->ipv4_iface) { 294 iscsi_destroy_iface(phba->ipv4_iface); 295 phba->ipv4_iface = NULL; 296 } 297 } 298 299 /** 300 * beiscsi_set_vlan_tag()- Set the VLAN TAG 301 * @shost: Scsi Host for the driver instance 302 * @iface_param: Interface paramters 303 * 304 * Set the VLAN TAG for the adapter or disable 305 * the VLAN config 306 * 307 * returns 308 * Success: 0 309 * Failure: Non-Zero Value 310 **/ 311 static int 312 beiscsi_iface_config_vlan(struct Scsi_Host *shost, 313 struct iscsi_iface_param_info *iface_param) 314 { 315 struct beiscsi_hba *phba = iscsi_host_priv(shost); 316 int ret = -EPERM; 317 318 switch (iface_param->param) { 319 case ISCSI_NET_PARAM_VLAN_ENABLED: 320 ret = 0; 321 if (iface_param->value[0] != ISCSI_VLAN_ENABLE) 322 ret = beiscsi_if_set_vlan(phba, BEISCSI_VLAN_DISABLE); 323 break; 324 case ISCSI_NET_PARAM_VLAN_TAG: 325 ret = beiscsi_if_set_vlan(phba, 326 *((uint16_t *)iface_param->value)); 327 break; 328 } 329 return ret; 330 } 331 332 333 static int 334 beiscsi_iface_config_ipv4(struct Scsi_Host *shost, 335 struct iscsi_iface_param_info *info, 336 void *data, uint32_t dt_len) 337 { 338 struct beiscsi_hba *phba = iscsi_host_priv(shost); 339 u8 *ip = NULL, *subnet = NULL, *gw; 340 struct nlattr *nla; 341 int ret = -EPERM; 342 343 /* Check the param */ 344 switch (info->param) { 345 case ISCSI_NET_PARAM_IFACE_ENABLE: 346 if (info->value[0] == ISCSI_IFACE_ENABLE) 347 ret = beiscsi_iface_create_ipv4(phba); 348 else { 349 iscsi_destroy_iface(phba->ipv4_iface); 350 phba->ipv4_iface = NULL; 351 } 352 break; 353 case ISCSI_NET_PARAM_IPV4_GW: 354 gw = info->value; 355 ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw); 356 break; 357 case ISCSI_NET_PARAM_IPV4_BOOTPROTO: 358 if (info->value[0] == ISCSI_BOOTPROTO_DHCP) 359 ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4); 360 else if (info->value[0] == ISCSI_BOOTPROTO_STATIC) 361 /* release DHCP IP address */ 362 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4, 363 NULL, NULL); 364 else 365 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 366 "BS_%d : Invalid BOOTPROTO: %d\n", 367 info->value[0]); 368 break; 369 case ISCSI_NET_PARAM_IPV4_ADDR: 370 ip = info->value; 371 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_SUBNET); 372 if (nla) { 373 info = nla_data(nla); 374 subnet = info->value; 375 } 376 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4, 377 ip, subnet); 378 break; 379 case ISCSI_NET_PARAM_IPV4_SUBNET: 380 /* 381 * OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR ioctl needs IP 382 * and subnet both. Find IP to be applied for this subnet. 383 */ 384 subnet = info->value; 385 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_ADDR); 386 if (nla) { 387 info = nla_data(nla); 388 ip = info->value; 389 } 390 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4, 391 ip, subnet); 392 break; 393 } 394 395 return ret; 396 } 397 398 static int 399 beiscsi_iface_config_ipv6(struct Scsi_Host *shost, 400 struct iscsi_iface_param_info *iface_param, 401 void *data, uint32_t dt_len) 402 { 403 struct beiscsi_hba *phba = iscsi_host_priv(shost); 404 int ret = -EPERM; 405 406 switch (iface_param->param) { 407 case ISCSI_NET_PARAM_IFACE_ENABLE: 408 if (iface_param->value[0] == ISCSI_IFACE_ENABLE) 409 ret = beiscsi_iface_create_ipv6(phba); 410 else { 411 iscsi_destroy_iface(phba->ipv6_iface); 412 phba->ipv6_iface = NULL; 413 } 414 break; 415 case ISCSI_NET_PARAM_IPV6_ADDR: 416 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6, 417 iface_param->value, NULL); 418 break; 419 } 420 421 return ret; 422 } 423 424 int beiscsi_iface_set_param(struct Scsi_Host *shost, 425 void *data, uint32_t dt_len) 426 { 427 struct iscsi_iface_param_info *iface_param = NULL; 428 struct beiscsi_hba *phba = iscsi_host_priv(shost); 429 struct nlattr *attrib; 430 uint32_t rm_len = dt_len; 431 int ret; 432 433 if (!beiscsi_hba_is_online(phba)) { 434 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 435 "BS_%d : HBA in error 0x%lx\n", phba->state); 436 return -EBUSY; 437 } 438 439 /* update interface_handle */ 440 ret = beiscsi_if_get_handle(phba); 441 if (ret) { 442 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 443 "BS_%d : Getting Interface Handle Failed\n"); 444 return ret; 445 } 446 447 nla_for_each_attr(attrib, data, dt_len, rm_len) { 448 iface_param = nla_data(attrib); 449 450 if (iface_param->param_type != ISCSI_NET_PARAM) 451 continue; 452 453 /* 454 * BE2ISCSI only supports 1 interface 455 */ 456 if (iface_param->iface_num) { 457 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 458 "BS_%d : Invalid iface_num %d." 459 "Only iface_num 0 is supported.\n", 460 iface_param->iface_num); 461 462 return -EINVAL; 463 } 464 465 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 466 "BS_%d : %s.0 set param %d", 467 (iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ? 468 "ipv4" : "ipv6", iface_param->param); 469 470 ret = -EPERM; 471 switch (iface_param->param) { 472 case ISCSI_NET_PARAM_VLAN_ENABLED: 473 case ISCSI_NET_PARAM_VLAN_TAG: 474 ret = beiscsi_iface_config_vlan(shost, iface_param); 475 break; 476 default: 477 switch (iface_param->iface_type) { 478 case ISCSI_IFACE_TYPE_IPV4: 479 ret = beiscsi_iface_config_ipv4(shost, 480 iface_param, 481 data, dt_len); 482 break; 483 case ISCSI_IFACE_TYPE_IPV6: 484 ret = beiscsi_iface_config_ipv6(shost, 485 iface_param, 486 data, dt_len); 487 break; 488 } 489 } 490 491 if (ret == -EPERM) { 492 __beiscsi_log(phba, KERN_ERR, 493 "BS_%d : %s.0 set param %d not permitted", 494 (iface_param->iface_type == 495 ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6", 496 iface_param->param); 497 ret = 0; 498 } 499 if (ret) 500 break; 501 } 502 503 return ret; 504 } 505 506 static int __beiscsi_iface_get_param(struct beiscsi_hba *phba, 507 struct iscsi_iface *iface, 508 int param, char *buf) 509 { 510 struct be_cmd_get_if_info_resp *if_info; 511 int len, ip_type = BEISCSI_IP_TYPE_V4; 512 513 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) 514 ip_type = BEISCSI_IP_TYPE_V6; 515 516 len = beiscsi_if_get_info(phba, ip_type, &if_info); 517 if (len) 518 return len; 519 520 switch (param) { 521 case ISCSI_NET_PARAM_IPV4_ADDR: 522 len = sprintf(buf, "%pI4\n", if_info->ip_addr.addr); 523 break; 524 case ISCSI_NET_PARAM_IPV6_ADDR: 525 len = sprintf(buf, "%pI6\n", if_info->ip_addr.addr); 526 break; 527 case ISCSI_NET_PARAM_IPV4_BOOTPROTO: 528 if (!if_info->dhcp_state) 529 len = sprintf(buf, "static\n"); 530 else 531 len = sprintf(buf, "dhcp\n"); 532 break; 533 case ISCSI_NET_PARAM_IPV4_SUBNET: 534 len = sprintf(buf, "%pI4\n", if_info->ip_addr.subnet_mask); 535 break; 536 case ISCSI_NET_PARAM_VLAN_ENABLED: 537 len = sprintf(buf, "%s\n", 538 (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ? 539 "disable" : "enable"); 540 break; 541 case ISCSI_NET_PARAM_VLAN_ID: 542 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) 543 len = -EINVAL; 544 else 545 len = sprintf(buf, "%d\n", 546 (if_info->vlan_priority & 547 ISCSI_MAX_VLAN_ID)); 548 break; 549 case ISCSI_NET_PARAM_VLAN_PRIORITY: 550 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) 551 len = -EINVAL; 552 else 553 len = sprintf(buf, "%d\n", 554 ((if_info->vlan_priority >> 13) & 555 ISCSI_MAX_VLAN_PRIORITY)); 556 break; 557 default: 558 WARN_ON(1); 559 } 560 561 kfree(if_info); 562 return len; 563 } 564 565 int beiscsi_iface_get_param(struct iscsi_iface *iface, 566 enum iscsi_param_type param_type, 567 int param, char *buf) 568 { 569 struct Scsi_Host *shost = iscsi_iface_to_shost(iface); 570 struct beiscsi_hba *phba = iscsi_host_priv(shost); 571 struct be_cmd_get_def_gateway_resp gateway; 572 int len = -EPERM; 573 574 if (param_type != ISCSI_NET_PARAM) 575 return 0; 576 if (!beiscsi_hba_is_online(phba)) { 577 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 578 "BS_%d : HBA in error 0x%lx\n", phba->state); 579 return -EBUSY; 580 } 581 582 switch (param) { 583 case ISCSI_NET_PARAM_IPV4_ADDR: 584 case ISCSI_NET_PARAM_IPV4_SUBNET: 585 case ISCSI_NET_PARAM_IPV4_BOOTPROTO: 586 case ISCSI_NET_PARAM_IPV6_ADDR: 587 case ISCSI_NET_PARAM_VLAN_ENABLED: 588 case ISCSI_NET_PARAM_VLAN_ID: 589 case ISCSI_NET_PARAM_VLAN_PRIORITY: 590 len = __beiscsi_iface_get_param(phba, iface, param, buf); 591 break; 592 case ISCSI_NET_PARAM_IFACE_ENABLE: 593 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) 594 len = sprintf(buf, "%s\n", 595 phba->ipv4_iface ? "enable" : "disable"); 596 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) 597 len = sprintf(buf, "%s\n", 598 phba->ipv6_iface ? "enable" : "disable"); 599 break; 600 case ISCSI_NET_PARAM_IPV4_GW: 601 memset(&gateway, 0, sizeof(gateway)); 602 len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway); 603 if (!len) 604 len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr); 605 break; 606 } 607 608 return len; 609 } 610 611 /** 612 * beiscsi_ep_get_param - get the iscsi parameter 613 * @ep: pointer to iscsi ep 614 * @param: parameter type identifier 615 * @buf: buffer pointer 616 * 617 * returns iscsi parameter 618 */ 619 int beiscsi_ep_get_param(struct iscsi_endpoint *ep, 620 enum iscsi_param param, char *buf) 621 { 622 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 623 int len; 624 625 beiscsi_log(beiscsi_ep->phba, KERN_INFO, 626 BEISCSI_LOG_CONFIG, 627 "BS_%d : In beiscsi_ep_get_param," 628 " param= %d\n", param); 629 630 switch (param) { 631 case ISCSI_PARAM_CONN_PORT: 632 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport); 633 break; 634 case ISCSI_PARAM_CONN_ADDRESS: 635 if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4) 636 len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr); 637 else 638 len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr); 639 break; 640 default: 641 len = -EPERM; 642 } 643 return len; 644 } 645 646 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn, 647 enum iscsi_param param, char *buf, int buflen) 648 { 649 struct iscsi_conn *conn = cls_conn->dd_data; 650 struct iscsi_session *session = conn->session; 651 struct beiscsi_hba *phba = NULL; 652 int ret; 653 654 phba = ((struct beiscsi_conn *)conn->dd_data)->phba; 655 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 656 "BS_%d : In beiscsi_conn_set_param," 657 " param= %d\n", param); 658 659 ret = iscsi_set_param(cls_conn, param, buf, buflen); 660 if (ret) 661 return ret; 662 /* 663 * If userspace tried to set the value to higher than we can 664 * support override here. 665 */ 666 switch (param) { 667 case ISCSI_PARAM_FIRST_BURST: 668 if (session->first_burst > 8192) 669 session->first_burst = 8192; 670 break; 671 case ISCSI_PARAM_MAX_RECV_DLENGTH: 672 if (conn->max_recv_dlength > 65536) 673 conn->max_recv_dlength = 65536; 674 break; 675 case ISCSI_PARAM_MAX_BURST: 676 if (session->max_burst > 262144) 677 session->max_burst = 262144; 678 break; 679 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 680 if (conn->max_xmit_dlength > 65536) 681 conn->max_xmit_dlength = 65536; 682 default: 683 return 0; 684 } 685 686 return 0; 687 } 688 689 /** 690 * beiscsi_get_port_state - Get the Port State 691 * @shost : pointer to scsi_host structure 692 * 693 */ 694 static void beiscsi_get_port_state(struct Scsi_Host *shost) 695 { 696 struct beiscsi_hba *phba = iscsi_host_priv(shost); 697 struct iscsi_cls_host *ihost = shost->shost_data; 698 699 ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ? 700 ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN; 701 } 702 703 /** 704 * beiscsi_get_port_speed - Get the Port Speed from Adapter 705 * @shost : pointer to scsi_host structure 706 * 707 */ 708 static void beiscsi_get_port_speed(struct Scsi_Host *shost) 709 { 710 struct beiscsi_hba *phba = iscsi_host_priv(shost); 711 struct iscsi_cls_host *ihost = shost->shost_data; 712 713 switch (phba->port_speed) { 714 case BE2ISCSI_LINK_SPEED_10MBPS: 715 ihost->port_speed = ISCSI_PORT_SPEED_10MBPS; 716 break; 717 case BE2ISCSI_LINK_SPEED_100MBPS: 718 ihost->port_speed = ISCSI_PORT_SPEED_100MBPS; 719 break; 720 case BE2ISCSI_LINK_SPEED_1GBPS: 721 ihost->port_speed = ISCSI_PORT_SPEED_1GBPS; 722 break; 723 case BE2ISCSI_LINK_SPEED_10GBPS: 724 ihost->port_speed = ISCSI_PORT_SPEED_10GBPS; 725 break; 726 case BE2ISCSI_LINK_SPEED_25GBPS: 727 ihost->port_speed = ISCSI_PORT_SPEED_25GBPS; 728 break; 729 case BE2ISCSI_LINK_SPEED_40GBPS: 730 ihost->port_speed = ISCSI_PORT_SPEED_40GBPS; 731 break; 732 default: 733 ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN; 734 } 735 } 736 737 /** 738 * beiscsi_get_host_param - get the iscsi parameter 739 * @shost: pointer to scsi_host structure 740 * @param: parameter type identifier 741 * @buf: buffer pointer 742 * 743 */ 744 int beiscsi_get_host_param(struct Scsi_Host *shost, 745 enum iscsi_host_param param, char *buf) 746 { 747 struct beiscsi_hba *phba = iscsi_host_priv(shost); 748 int status = 0; 749 750 if (!beiscsi_hba_is_online(phba)) { 751 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 752 "BS_%d : HBA in error 0x%lx\n", phba->state); 753 return 0; 754 } 755 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 756 "BS_%d : In beiscsi_get_host_param, param = %d\n", param); 757 758 switch (param) { 759 case ISCSI_HOST_PARAM_HWADDRESS: 760 status = beiscsi_get_macaddr(buf, phba); 761 if (status < 0) { 762 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 763 "BS_%d : beiscsi_get_macaddr Failed\n"); 764 return 0; 765 } 766 break; 767 case ISCSI_HOST_PARAM_INITIATOR_NAME: 768 /* try fetching user configured name first */ 769 status = beiscsi_get_initiator_name(phba, buf, true); 770 if (status < 0) { 771 status = beiscsi_get_initiator_name(phba, buf, false); 772 if (status < 0) { 773 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 774 "BS_%d : Retrieving Initiator Name Failed\n"); 775 status = 0; 776 } 777 } 778 break; 779 case ISCSI_HOST_PARAM_PORT_STATE: 780 beiscsi_get_port_state(shost); 781 status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost)); 782 break; 783 case ISCSI_HOST_PARAM_PORT_SPEED: 784 beiscsi_get_port_speed(shost); 785 status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost)); 786 break; 787 default: 788 return iscsi_host_get_param(shost, param, buf); 789 } 790 return status; 791 } 792 793 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba) 794 { 795 struct be_cmd_get_nic_conf_resp resp; 796 int rc; 797 798 if (phba->mac_addr_set) 799 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN); 800 801 memset(&resp, 0, sizeof(resp)); 802 rc = mgmt_get_nic_conf(phba, &resp); 803 if (rc) 804 return rc; 805 806 phba->mac_addr_set = true; 807 memcpy(phba->mac_address, resp.mac_address, ETH_ALEN); 808 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN); 809 } 810 811 /** 812 * beiscsi_conn_get_stats - get the iscsi stats 813 * @cls_conn: pointer to iscsi cls conn 814 * @stats: pointer to iscsi_stats structure 815 * 816 * returns iscsi stats 817 */ 818 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 819 struct iscsi_stats *stats) 820 { 821 struct iscsi_conn *conn = cls_conn->dd_data; 822 struct beiscsi_hba *phba = NULL; 823 824 phba = ((struct beiscsi_conn *)conn->dd_data)->phba; 825 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 826 "BS_%d : In beiscsi_conn_get_stats\n"); 827 828 stats->txdata_octets = conn->txdata_octets; 829 stats->rxdata_octets = conn->rxdata_octets; 830 stats->dataout_pdus = conn->dataout_pdus_cnt; 831 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 832 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 833 stats->datain_pdus = conn->datain_pdus_cnt; 834 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 835 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 836 stats->r2t_pdus = conn->r2t_pdus_cnt; 837 stats->digest_err = 0; 838 stats->timeout_err = 0; 839 stats->custom_length = 1; 840 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 841 stats->custom[0].value = conn->eh_abort_cnt; 842 } 843 844 /** 845 * beiscsi_set_params_for_offld - get the parameters for offload 846 * @beiscsi_conn: pointer to beiscsi_conn 847 * @params: pointer to offload_params structure 848 */ 849 static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn, 850 struct beiscsi_offload_params *params) 851 { 852 struct iscsi_conn *conn = beiscsi_conn->conn; 853 struct iscsi_session *session = conn->session; 854 855 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length, 856 params, session->max_burst); 857 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 858 max_send_data_segment_length, params, 859 conn->max_xmit_dlength); 860 AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length, 861 params, session->first_burst); 862 AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params, 863 session->erl); 864 AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params, 865 conn->datadgst_en); 866 AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params, 867 conn->hdrdgst_en); 868 AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params, 869 session->initial_r2t_en); 870 AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params, 871 session->imm_data_en); 872 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 873 data_seq_inorder, params, 874 session->dataseq_inorder_en); 875 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 876 pdu_seq_inorder, params, 877 session->pdu_inorder_en); 878 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params, 879 session->max_r2t); 880 AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params, 881 (conn->exp_statsn - 1)); 882 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 883 max_recv_data_segment_length, params, 884 conn->max_recv_dlength); 885 886 } 887 888 /** 889 * beiscsi_conn_start - offload of session to chip 890 * @cls_conn: pointer to beiscsi_conn 891 */ 892 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) 893 { 894 struct iscsi_conn *conn = cls_conn->dd_data; 895 struct beiscsi_conn *beiscsi_conn = conn->dd_data; 896 struct beiscsi_endpoint *beiscsi_ep; 897 struct beiscsi_offload_params params; 898 struct beiscsi_hba *phba; 899 900 phba = ((struct beiscsi_conn *)conn->dd_data)->phba; 901 902 if (!beiscsi_hba_is_online(phba)) { 903 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 904 "BS_%d : HBA in error 0x%lx\n", phba->state); 905 return -EBUSY; 906 } 907 beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG, 908 "BS_%d : In beiscsi_conn_start\n"); 909 910 memset(¶ms, 0, sizeof(struct beiscsi_offload_params)); 911 beiscsi_ep = beiscsi_conn->ep; 912 if (!beiscsi_ep) 913 beiscsi_log(beiscsi_conn->phba, KERN_ERR, 914 BEISCSI_LOG_CONFIG, 915 "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n"); 916 917 beiscsi_conn->login_in_progress = 0; 918 beiscsi_set_params_for_offld(beiscsi_conn, ¶ms); 919 beiscsi_offload_connection(beiscsi_conn, ¶ms); 920 iscsi_conn_start(cls_conn); 921 return 0; 922 } 923 924 /** 925 * beiscsi_get_cid - Allocate a cid 926 * @phba: The phba instance 927 */ 928 static int beiscsi_get_cid(struct beiscsi_hba *phba) 929 { 930 uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1; 931 unsigned short cid, cid_from_ulp; 932 struct ulp_cid_info *cid_info; 933 934 /* Find the ULP which has more CID available */ 935 cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ? 936 BEISCSI_ULP0_AVLBL_CID(phba) : 0; 937 cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ? 938 BEISCSI_ULP1_AVLBL_CID(phba) : 0; 939 cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ? 940 BEISCSI_ULP0 : BEISCSI_ULP1; 941 /** 942 * If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp 943 * is ZERO for both, ULP 1 is returned. 944 * Check if ULP is loaded before getting new CID. 945 */ 946 if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported)) 947 return BE_INVALID_CID; 948 949 cid_info = phba->cid_array_info[cid_from_ulp]; 950 cid = cid_info->cid_array[cid_info->cid_alloc]; 951 if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) { 952 __beiscsi_log(phba, KERN_ERR, 953 "BS_%d : failed to get cid: available %u:%u\n", 954 cid_info->avlbl_cids, cid_info->cid_free); 955 return BE_INVALID_CID; 956 } 957 /* empty the slot */ 958 cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID; 959 if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp)) 960 cid_info->cid_alloc = 0; 961 cid_info->avlbl_cids--; 962 return cid; 963 } 964 965 /** 966 * beiscsi_put_cid - Free the cid 967 * @phba: The phba for which the cid is being freed 968 * @cid: The cid to free 969 */ 970 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) 971 { 972 uint16_t cri_index = BE_GET_CRI_FROM_CID(cid); 973 struct hwi_wrb_context *pwrb_context; 974 struct hwi_controller *phwi_ctrlr; 975 struct ulp_cid_info *cid_info; 976 uint16_t cid_post_ulp; 977 978 phwi_ctrlr = phba->phwi_ctrlr; 979 pwrb_context = &phwi_ctrlr->wrb_context[cri_index]; 980 cid_post_ulp = pwrb_context->ulp_num; 981 982 cid_info = phba->cid_array_info[cid_post_ulp]; 983 /* fill only in empty slot */ 984 if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) { 985 __beiscsi_log(phba, KERN_ERR, 986 "BS_%d : failed to put cid %u: available %u:%u\n", 987 cid, cid_info->avlbl_cids, cid_info->cid_free); 988 return; 989 } 990 cid_info->cid_array[cid_info->cid_free++] = cid; 991 if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp)) 992 cid_info->cid_free = 0; 993 cid_info->avlbl_cids++; 994 } 995 996 /** 997 * beiscsi_free_ep - free endpoint 998 * @ep: pointer to iscsi endpoint structure 999 */ 1000 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) 1001 { 1002 struct beiscsi_hba *phba = beiscsi_ep->phba; 1003 struct beiscsi_conn *beiscsi_conn; 1004 1005 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 1006 beiscsi_ep->phba = NULL; 1007 /* clear this to track freeing in beiscsi_ep_disconnect */ 1008 phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL; 1009 1010 /** 1011 * Check if any connection resource allocated by driver 1012 * is to be freed.This case occurs when target redirection 1013 * or connection retry is done. 1014 **/ 1015 if (!beiscsi_ep->conn) 1016 return; 1017 1018 beiscsi_conn = beiscsi_ep->conn; 1019 /** 1020 * Break ep->conn link here so that completions after 1021 * this are ignored. 1022 */ 1023 beiscsi_ep->conn = NULL; 1024 if (beiscsi_conn->login_in_progress) { 1025 beiscsi_free_mgmt_task_handles(beiscsi_conn, 1026 beiscsi_conn->task); 1027 beiscsi_conn->login_in_progress = 0; 1028 } 1029 } 1030 1031 /** 1032 * beiscsi_open_conn - Ask FW to open a TCP connection 1033 * @ep: endpoint to be used 1034 * @src_addr: The source IP address 1035 * @dst_addr: The Destination IP address 1036 * 1037 * Asks the FW to open a TCP connection 1038 */ 1039 static int beiscsi_open_conn(struct iscsi_endpoint *ep, 1040 struct sockaddr *src_addr, 1041 struct sockaddr *dst_addr, int non_blocking) 1042 { 1043 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 1044 struct beiscsi_hba *phba = beiscsi_ep->phba; 1045 struct tcp_connect_and_offload_out *ptcpcnct_out; 1046 struct be_dma_mem nonemb_cmd; 1047 unsigned int tag, req_memsize; 1048 int ret = -ENOMEM; 1049 1050 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1051 "BS_%d : In beiscsi_open_conn\n"); 1052 1053 beiscsi_ep->ep_cid = beiscsi_get_cid(phba); 1054 if (beiscsi_ep->ep_cid == BE_INVALID_CID) { 1055 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 1056 "BS_%d : No free cid available\n"); 1057 return ret; 1058 } 1059 1060 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1061 "BS_%d : In beiscsi_open_conn, ep_cid=%d\n", 1062 beiscsi_ep->ep_cid); 1063 1064 phba->ep_array[BE_GET_CRI_FROM_CID 1065 (beiscsi_ep->ep_cid)] = ep; 1066 1067 beiscsi_ep->cid_vld = 0; 1068 1069 if (is_chip_be2_be3r(phba)) 1070 req_memsize = sizeof(struct tcp_connect_and_offload_in); 1071 else 1072 req_memsize = sizeof(struct tcp_connect_and_offload_in_v1); 1073 1074 nonemb_cmd.va = dma_alloc_coherent(&phba->ctrl.pdev->dev, 1075 req_memsize, 1076 &nonemb_cmd.dma, GFP_KERNEL); 1077 if (nonemb_cmd.va == NULL) { 1078 1079 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 1080 "BS_%d : Failed to allocate memory for" 1081 " mgmt_open_connection\n"); 1082 1083 beiscsi_free_ep(beiscsi_ep); 1084 return -ENOMEM; 1085 } 1086 nonemb_cmd.size = req_memsize; 1087 memset(nonemb_cmd.va, 0, nonemb_cmd.size); 1088 tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd); 1089 if (!tag) { 1090 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 1091 "BS_%d : mgmt_open_connection Failed for cid=%d\n", 1092 beiscsi_ep->ep_cid); 1093 1094 dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size, 1095 nonemb_cmd.va, nonemb_cmd.dma); 1096 beiscsi_free_ep(beiscsi_ep); 1097 return -EAGAIN; 1098 } 1099 1100 ret = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd); 1101 if (ret) { 1102 beiscsi_log(phba, KERN_ERR, 1103 BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX, 1104 "BS_%d : mgmt_open_connection Failed"); 1105 1106 if (ret != -EBUSY) 1107 dma_free_coherent(&phba->ctrl.pdev->dev, 1108 nonemb_cmd.size, nonemb_cmd.va, 1109 nonemb_cmd.dma); 1110 1111 beiscsi_free_ep(beiscsi_ep); 1112 return ret; 1113 } 1114 1115 ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va; 1116 beiscsi_ep = ep->dd_data; 1117 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle; 1118 beiscsi_ep->cid_vld = 1; 1119 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1120 "BS_%d : mgmt_open_connection Success\n"); 1121 1122 dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size, 1123 nonemb_cmd.va, nonemb_cmd.dma); 1124 return 0; 1125 } 1126 1127 /** 1128 * beiscsi_ep_connect - Ask chip to create TCP Conn 1129 * @scsi_host: Pointer to scsi_host structure 1130 * @dst_addr: The IP address of Target 1131 * @non_blocking: blocking or non-blocking call 1132 * 1133 * This routines first asks chip to create a connection and then allocates an EP 1134 */ 1135 struct iscsi_endpoint * 1136 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 1137 int non_blocking) 1138 { 1139 struct beiscsi_hba *phba; 1140 struct beiscsi_endpoint *beiscsi_ep; 1141 struct iscsi_endpoint *ep; 1142 int ret; 1143 1144 if (!shost) { 1145 ret = -ENXIO; 1146 pr_err("beiscsi_ep_connect shost is NULL\n"); 1147 return ERR_PTR(ret); 1148 } 1149 1150 phba = iscsi_host_priv(shost); 1151 if (!beiscsi_hba_is_online(phba)) { 1152 ret = -EIO; 1153 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1154 "BS_%d : HBA in error 0x%lx\n", phba->state); 1155 return ERR_PTR(ret); 1156 } 1157 if (!test_bit(BEISCSI_HBA_LINK_UP, &phba->state)) { 1158 ret = -EBUSY; 1159 beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG, 1160 "BS_%d : The Adapter Port state is Down!!!\n"); 1161 return ERR_PTR(ret); 1162 } 1163 1164 ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint)); 1165 if (!ep) { 1166 ret = -ENOMEM; 1167 return ERR_PTR(ret); 1168 } 1169 1170 beiscsi_ep = ep->dd_data; 1171 beiscsi_ep->phba = phba; 1172 beiscsi_ep->openiscsi_ep = ep; 1173 ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking); 1174 if (ret) { 1175 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 1176 "BS_%d : Failed in beiscsi_open_conn\n"); 1177 goto free_ep; 1178 } 1179 1180 return ep; 1181 1182 free_ep: 1183 iscsi_destroy_endpoint(ep); 1184 return ERR_PTR(ret); 1185 } 1186 1187 /** 1188 * beiscsi_ep_poll - Poll to see if connection is established 1189 * @ep: endpoint to be used 1190 * @timeout_ms: timeout specified in millisecs 1191 * 1192 * Poll to see if TCP connection established 1193 */ 1194 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 1195 { 1196 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 1197 1198 beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1199 "BS_%d : In beiscsi_ep_poll\n"); 1200 1201 if (beiscsi_ep->cid_vld == 1) 1202 return 1; 1203 else 1204 return 0; 1205 } 1206 1207 /** 1208 * beiscsi_flush_cq()- Flush the CQ created. 1209 * @phba: ptr device priv structure. 1210 * 1211 * Before the connection resource are freed flush 1212 * all the CQ enteries 1213 **/ 1214 static void beiscsi_flush_cq(struct beiscsi_hba *phba) 1215 { 1216 uint16_t i; 1217 struct be_eq_obj *pbe_eq; 1218 struct hwi_controller *phwi_ctrlr; 1219 struct hwi_context_memory *phwi_context; 1220 1221 phwi_ctrlr = phba->phwi_ctrlr; 1222 phwi_context = phwi_ctrlr->phwi_ctxt; 1223 1224 for (i = 0; i < phba->num_cpus; i++) { 1225 pbe_eq = &phwi_context->be_eq[i]; 1226 irq_poll_disable(&pbe_eq->iopoll); 1227 beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC); 1228 irq_poll_enable(&pbe_eq->iopoll); 1229 } 1230 } 1231 1232 /** 1233 * beiscsi_conn_close - Invalidate and upload connection 1234 * @ep: The iscsi endpoint 1235 * 1236 * Returns 0 on success, -1 on failure. 1237 */ 1238 static int beiscsi_conn_close(struct beiscsi_endpoint *beiscsi_ep) 1239 { 1240 struct beiscsi_hba *phba = beiscsi_ep->phba; 1241 unsigned int tag, attempts; 1242 int ret; 1243 1244 /** 1245 * Without successfully invalidating and uploading connection 1246 * driver can't reuse the CID so attempt more than once. 1247 */ 1248 attempts = 0; 1249 while (attempts++ < 3) { 1250 tag = beiscsi_invalidate_cxn(phba, beiscsi_ep); 1251 if (tag) { 1252 ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL); 1253 if (!ret) 1254 break; 1255 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1256 "BS_%d : invalidate conn failed cid %d\n", 1257 beiscsi_ep->ep_cid); 1258 } 1259 } 1260 1261 /* wait for all completions to arrive, then process them */ 1262 msleep(250); 1263 /* flush CQ entries */ 1264 beiscsi_flush_cq(phba); 1265 1266 if (attempts > 3) 1267 return -1; 1268 1269 attempts = 0; 1270 while (attempts++ < 3) { 1271 tag = beiscsi_upload_cxn(phba, beiscsi_ep); 1272 if (tag) { 1273 ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL); 1274 if (!ret) 1275 break; 1276 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1277 "BS_%d : upload conn failed cid %d\n", 1278 beiscsi_ep->ep_cid); 1279 } 1280 } 1281 if (attempts > 3) 1282 return -1; 1283 1284 return 0; 1285 } 1286 1287 /** 1288 * beiscsi_ep_disconnect - Tears down the TCP connection 1289 * @ep: endpoint to be used 1290 * 1291 * Tears down the TCP connection 1292 */ 1293 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) 1294 { 1295 struct beiscsi_endpoint *beiscsi_ep; 1296 struct beiscsi_conn *beiscsi_conn; 1297 struct beiscsi_hba *phba; 1298 uint16_t cri_index; 1299 1300 beiscsi_ep = ep->dd_data; 1301 phba = beiscsi_ep->phba; 1302 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1303 "BS_%d : In beiscsi_ep_disconnect for ep_cid = %u\n", 1304 beiscsi_ep->ep_cid); 1305 1306 cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid); 1307 if (!phba->ep_array[cri_index]) { 1308 __beiscsi_log(phba, KERN_ERR, 1309 "BS_%d : ep_array at %u cid %u empty\n", 1310 cri_index, 1311 beiscsi_ep->ep_cid); 1312 return; 1313 } 1314 1315 if (beiscsi_ep->conn) { 1316 beiscsi_conn = beiscsi_ep->conn; 1317 iscsi_suspend_queue(beiscsi_conn->conn); 1318 } 1319 1320 if (!beiscsi_hba_is_online(phba)) { 1321 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1322 "BS_%d : HBA in error 0x%lx\n", phba->state); 1323 } else { 1324 /** 1325 * Make CID available even if close fails. 1326 * If not freed, FW might fail open using the CID. 1327 */ 1328 if (beiscsi_conn_close(beiscsi_ep) < 0) 1329 __beiscsi_log(phba, KERN_ERR, 1330 "BS_%d : close conn failed cid %d\n", 1331 beiscsi_ep->ep_cid); 1332 } 1333 1334 beiscsi_free_ep(beiscsi_ep); 1335 if (!phba->conn_table[cri_index]) 1336 __beiscsi_log(phba, KERN_ERR, 1337 "BS_%d : conn_table empty at %u: cid %u\n", 1338 cri_index, beiscsi_ep->ep_cid); 1339 phba->conn_table[cri_index] = NULL; 1340 iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep); 1341 } 1342 1343 umode_t beiscsi_attr_is_visible(int param_type, int param) 1344 { 1345 switch (param_type) { 1346 case ISCSI_NET_PARAM: 1347 switch (param) { 1348 case ISCSI_NET_PARAM_IFACE_ENABLE: 1349 case ISCSI_NET_PARAM_IPV4_ADDR: 1350 case ISCSI_NET_PARAM_IPV4_SUBNET: 1351 case ISCSI_NET_PARAM_IPV4_BOOTPROTO: 1352 case ISCSI_NET_PARAM_IPV4_GW: 1353 case ISCSI_NET_PARAM_IPV6_ADDR: 1354 case ISCSI_NET_PARAM_VLAN_ID: 1355 case ISCSI_NET_PARAM_VLAN_PRIORITY: 1356 case ISCSI_NET_PARAM_VLAN_ENABLED: 1357 return S_IRUGO; 1358 default: 1359 return 0; 1360 } 1361 case ISCSI_HOST_PARAM: 1362 switch (param) { 1363 case ISCSI_HOST_PARAM_HWADDRESS: 1364 case ISCSI_HOST_PARAM_INITIATOR_NAME: 1365 case ISCSI_HOST_PARAM_PORT_STATE: 1366 case ISCSI_HOST_PARAM_PORT_SPEED: 1367 return S_IRUGO; 1368 default: 1369 return 0; 1370 } 1371 case ISCSI_PARAM: 1372 switch (param) { 1373 case ISCSI_PARAM_MAX_RECV_DLENGTH: 1374 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 1375 case ISCSI_PARAM_HDRDGST_EN: 1376 case ISCSI_PARAM_DATADGST_EN: 1377 case ISCSI_PARAM_CONN_ADDRESS: 1378 case ISCSI_PARAM_CONN_PORT: 1379 case ISCSI_PARAM_EXP_STATSN: 1380 case ISCSI_PARAM_PERSISTENT_ADDRESS: 1381 case ISCSI_PARAM_PERSISTENT_PORT: 1382 case ISCSI_PARAM_PING_TMO: 1383 case ISCSI_PARAM_RECV_TMO: 1384 case ISCSI_PARAM_INITIAL_R2T_EN: 1385 case ISCSI_PARAM_MAX_R2T: 1386 case ISCSI_PARAM_IMM_DATA_EN: 1387 case ISCSI_PARAM_FIRST_BURST: 1388 case ISCSI_PARAM_MAX_BURST: 1389 case ISCSI_PARAM_PDU_INORDER_EN: 1390 case ISCSI_PARAM_DATASEQ_INORDER_EN: 1391 case ISCSI_PARAM_ERL: 1392 case ISCSI_PARAM_TARGET_NAME: 1393 case ISCSI_PARAM_TPGT: 1394 case ISCSI_PARAM_USERNAME: 1395 case ISCSI_PARAM_PASSWORD: 1396 case ISCSI_PARAM_USERNAME_IN: 1397 case ISCSI_PARAM_PASSWORD_IN: 1398 case ISCSI_PARAM_FAST_ABORT: 1399 case ISCSI_PARAM_ABORT_TMO: 1400 case ISCSI_PARAM_LU_RESET_TMO: 1401 case ISCSI_PARAM_IFACE_NAME: 1402 case ISCSI_PARAM_INITIATOR_NAME: 1403 return S_IRUGO; 1404 default: 1405 return 0; 1406 } 1407 } 1408 1409 return 0; 1410 } 1411