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 /* fall through */ 683 default: 684 return 0; 685 } 686 687 return 0; 688 } 689 690 /** 691 * beiscsi_get_port_state - Get the Port State 692 * @shost : pointer to scsi_host structure 693 * 694 */ 695 static void beiscsi_get_port_state(struct Scsi_Host *shost) 696 { 697 struct beiscsi_hba *phba = iscsi_host_priv(shost); 698 struct iscsi_cls_host *ihost = shost->shost_data; 699 700 ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ? 701 ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN; 702 } 703 704 /** 705 * beiscsi_get_port_speed - Get the Port Speed from Adapter 706 * @shost : pointer to scsi_host structure 707 * 708 */ 709 static void beiscsi_get_port_speed(struct Scsi_Host *shost) 710 { 711 struct beiscsi_hba *phba = iscsi_host_priv(shost); 712 struct iscsi_cls_host *ihost = shost->shost_data; 713 714 switch (phba->port_speed) { 715 case BE2ISCSI_LINK_SPEED_10MBPS: 716 ihost->port_speed = ISCSI_PORT_SPEED_10MBPS; 717 break; 718 case BE2ISCSI_LINK_SPEED_100MBPS: 719 ihost->port_speed = ISCSI_PORT_SPEED_100MBPS; 720 break; 721 case BE2ISCSI_LINK_SPEED_1GBPS: 722 ihost->port_speed = ISCSI_PORT_SPEED_1GBPS; 723 break; 724 case BE2ISCSI_LINK_SPEED_10GBPS: 725 ihost->port_speed = ISCSI_PORT_SPEED_10GBPS; 726 break; 727 case BE2ISCSI_LINK_SPEED_25GBPS: 728 ihost->port_speed = ISCSI_PORT_SPEED_25GBPS; 729 break; 730 case BE2ISCSI_LINK_SPEED_40GBPS: 731 ihost->port_speed = ISCSI_PORT_SPEED_40GBPS; 732 break; 733 default: 734 ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN; 735 } 736 } 737 738 /** 739 * beiscsi_get_host_param - get the iscsi parameter 740 * @shost: pointer to scsi_host structure 741 * @param: parameter type identifier 742 * @buf: buffer pointer 743 * 744 */ 745 int beiscsi_get_host_param(struct Scsi_Host *shost, 746 enum iscsi_host_param param, char *buf) 747 { 748 struct beiscsi_hba *phba = iscsi_host_priv(shost); 749 int status = 0; 750 751 if (!beiscsi_hba_is_online(phba)) { 752 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 753 "BS_%d : HBA in error 0x%lx\n", phba->state); 754 return 0; 755 } 756 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 757 "BS_%d : In beiscsi_get_host_param, param = %d\n", param); 758 759 switch (param) { 760 case ISCSI_HOST_PARAM_HWADDRESS: 761 status = beiscsi_get_macaddr(buf, phba); 762 if (status < 0) { 763 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 764 "BS_%d : beiscsi_get_macaddr Failed\n"); 765 return 0; 766 } 767 break; 768 case ISCSI_HOST_PARAM_INITIATOR_NAME: 769 /* try fetching user configured name first */ 770 status = beiscsi_get_initiator_name(phba, buf, true); 771 if (status < 0) { 772 status = beiscsi_get_initiator_name(phba, buf, false); 773 if (status < 0) { 774 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 775 "BS_%d : Retrieving Initiator Name Failed\n"); 776 status = 0; 777 } 778 } 779 break; 780 case ISCSI_HOST_PARAM_PORT_STATE: 781 beiscsi_get_port_state(shost); 782 status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost)); 783 break; 784 case ISCSI_HOST_PARAM_PORT_SPEED: 785 beiscsi_get_port_speed(shost); 786 status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost)); 787 break; 788 default: 789 return iscsi_host_get_param(shost, param, buf); 790 } 791 return status; 792 } 793 794 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba) 795 { 796 struct be_cmd_get_nic_conf_resp resp; 797 int rc; 798 799 if (phba->mac_addr_set) 800 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN); 801 802 memset(&resp, 0, sizeof(resp)); 803 rc = mgmt_get_nic_conf(phba, &resp); 804 if (rc) 805 return rc; 806 807 phba->mac_addr_set = true; 808 memcpy(phba->mac_address, resp.mac_address, ETH_ALEN); 809 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN); 810 } 811 812 /** 813 * beiscsi_conn_get_stats - get the iscsi stats 814 * @cls_conn: pointer to iscsi cls conn 815 * @stats: pointer to iscsi_stats structure 816 * 817 * returns iscsi stats 818 */ 819 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 820 struct iscsi_stats *stats) 821 { 822 struct iscsi_conn *conn = cls_conn->dd_data; 823 struct beiscsi_hba *phba = NULL; 824 825 phba = ((struct beiscsi_conn *)conn->dd_data)->phba; 826 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 827 "BS_%d : In beiscsi_conn_get_stats\n"); 828 829 stats->txdata_octets = conn->txdata_octets; 830 stats->rxdata_octets = conn->rxdata_octets; 831 stats->dataout_pdus = conn->dataout_pdus_cnt; 832 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 833 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 834 stats->datain_pdus = conn->datain_pdus_cnt; 835 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 836 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 837 stats->r2t_pdus = conn->r2t_pdus_cnt; 838 stats->digest_err = 0; 839 stats->timeout_err = 0; 840 stats->custom_length = 1; 841 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 842 stats->custom[0].value = conn->eh_abort_cnt; 843 } 844 845 /** 846 * beiscsi_set_params_for_offld - get the parameters for offload 847 * @beiscsi_conn: pointer to beiscsi_conn 848 * @params: pointer to offload_params structure 849 */ 850 static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn, 851 struct beiscsi_offload_params *params) 852 { 853 struct iscsi_conn *conn = beiscsi_conn->conn; 854 struct iscsi_session *session = conn->session; 855 856 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length, 857 params, session->max_burst); 858 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 859 max_send_data_segment_length, params, 860 conn->max_xmit_dlength); 861 AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length, 862 params, session->first_burst); 863 AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params, 864 session->erl); 865 AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params, 866 conn->datadgst_en); 867 AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params, 868 conn->hdrdgst_en); 869 AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params, 870 session->initial_r2t_en); 871 AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params, 872 session->imm_data_en); 873 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 874 data_seq_inorder, params, 875 session->dataseq_inorder_en); 876 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 877 pdu_seq_inorder, params, 878 session->pdu_inorder_en); 879 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params, 880 session->max_r2t); 881 AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params, 882 (conn->exp_statsn - 1)); 883 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 884 max_recv_data_segment_length, params, 885 conn->max_recv_dlength); 886 887 } 888 889 /** 890 * beiscsi_conn_start - offload of session to chip 891 * @cls_conn: pointer to beiscsi_conn 892 */ 893 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) 894 { 895 struct iscsi_conn *conn = cls_conn->dd_data; 896 struct beiscsi_conn *beiscsi_conn = conn->dd_data; 897 struct beiscsi_endpoint *beiscsi_ep; 898 struct beiscsi_offload_params params; 899 struct beiscsi_hba *phba; 900 901 phba = ((struct beiscsi_conn *)conn->dd_data)->phba; 902 903 if (!beiscsi_hba_is_online(phba)) { 904 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 905 "BS_%d : HBA in error 0x%lx\n", phba->state); 906 return -EBUSY; 907 } 908 beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG, 909 "BS_%d : In beiscsi_conn_start\n"); 910 911 memset(¶ms, 0, sizeof(struct beiscsi_offload_params)); 912 beiscsi_ep = beiscsi_conn->ep; 913 if (!beiscsi_ep) 914 beiscsi_log(beiscsi_conn->phba, KERN_ERR, 915 BEISCSI_LOG_CONFIG, 916 "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n"); 917 918 beiscsi_conn->login_in_progress = 0; 919 beiscsi_set_params_for_offld(beiscsi_conn, ¶ms); 920 beiscsi_offload_connection(beiscsi_conn, ¶ms); 921 iscsi_conn_start(cls_conn); 922 return 0; 923 } 924 925 /** 926 * beiscsi_get_cid - Allocate a cid 927 * @phba: The phba instance 928 */ 929 static int beiscsi_get_cid(struct beiscsi_hba *phba) 930 { 931 uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1; 932 unsigned short cid, cid_from_ulp; 933 struct ulp_cid_info *cid_info; 934 935 /* Find the ULP which has more CID available */ 936 cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ? 937 BEISCSI_ULP0_AVLBL_CID(phba) : 0; 938 cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ? 939 BEISCSI_ULP1_AVLBL_CID(phba) : 0; 940 cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ? 941 BEISCSI_ULP0 : BEISCSI_ULP1; 942 /** 943 * If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp 944 * is ZERO for both, ULP 1 is returned. 945 * Check if ULP is loaded before getting new CID. 946 */ 947 if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported)) 948 return BE_INVALID_CID; 949 950 cid_info = phba->cid_array_info[cid_from_ulp]; 951 cid = cid_info->cid_array[cid_info->cid_alloc]; 952 if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) { 953 __beiscsi_log(phba, KERN_ERR, 954 "BS_%d : failed to get cid: available %u:%u\n", 955 cid_info->avlbl_cids, cid_info->cid_free); 956 return BE_INVALID_CID; 957 } 958 /* empty the slot */ 959 cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID; 960 if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp)) 961 cid_info->cid_alloc = 0; 962 cid_info->avlbl_cids--; 963 return cid; 964 } 965 966 /** 967 * beiscsi_put_cid - Free the cid 968 * @phba: The phba for which the cid is being freed 969 * @cid: The cid to free 970 */ 971 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) 972 { 973 uint16_t cri_index = BE_GET_CRI_FROM_CID(cid); 974 struct hwi_wrb_context *pwrb_context; 975 struct hwi_controller *phwi_ctrlr; 976 struct ulp_cid_info *cid_info; 977 uint16_t cid_post_ulp; 978 979 phwi_ctrlr = phba->phwi_ctrlr; 980 pwrb_context = &phwi_ctrlr->wrb_context[cri_index]; 981 cid_post_ulp = pwrb_context->ulp_num; 982 983 cid_info = phba->cid_array_info[cid_post_ulp]; 984 /* fill only in empty slot */ 985 if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) { 986 __beiscsi_log(phba, KERN_ERR, 987 "BS_%d : failed to put cid %u: available %u:%u\n", 988 cid, cid_info->avlbl_cids, cid_info->cid_free); 989 return; 990 } 991 cid_info->cid_array[cid_info->cid_free++] = cid; 992 if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp)) 993 cid_info->cid_free = 0; 994 cid_info->avlbl_cids++; 995 } 996 997 /** 998 * beiscsi_free_ep - free endpoint 999 * @ep: pointer to iscsi endpoint structure 1000 */ 1001 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) 1002 { 1003 struct beiscsi_hba *phba = beiscsi_ep->phba; 1004 struct beiscsi_conn *beiscsi_conn; 1005 1006 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 1007 beiscsi_ep->phba = NULL; 1008 /* clear this to track freeing in beiscsi_ep_disconnect */ 1009 phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL; 1010 1011 /** 1012 * Check if any connection resource allocated by driver 1013 * is to be freed.This case occurs when target redirection 1014 * or connection retry is done. 1015 **/ 1016 if (!beiscsi_ep->conn) 1017 return; 1018 1019 beiscsi_conn = beiscsi_ep->conn; 1020 /** 1021 * Break ep->conn link here so that completions after 1022 * this are ignored. 1023 */ 1024 beiscsi_ep->conn = NULL; 1025 if (beiscsi_conn->login_in_progress) { 1026 beiscsi_free_mgmt_task_handles(beiscsi_conn, 1027 beiscsi_conn->task); 1028 beiscsi_conn->login_in_progress = 0; 1029 } 1030 } 1031 1032 /** 1033 * beiscsi_open_conn - Ask FW to open a TCP connection 1034 * @ep: endpoint to be used 1035 * @src_addr: The source IP address 1036 * @dst_addr: The Destination IP address 1037 * 1038 * Asks the FW to open a TCP connection 1039 */ 1040 static int beiscsi_open_conn(struct iscsi_endpoint *ep, 1041 struct sockaddr *src_addr, 1042 struct sockaddr *dst_addr, int non_blocking) 1043 { 1044 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 1045 struct beiscsi_hba *phba = beiscsi_ep->phba; 1046 struct tcp_connect_and_offload_out *ptcpcnct_out; 1047 struct be_dma_mem nonemb_cmd; 1048 unsigned int tag, req_memsize; 1049 int ret = -ENOMEM; 1050 1051 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1052 "BS_%d : In beiscsi_open_conn\n"); 1053 1054 beiscsi_ep->ep_cid = beiscsi_get_cid(phba); 1055 if (beiscsi_ep->ep_cid == BE_INVALID_CID) { 1056 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 1057 "BS_%d : No free cid available\n"); 1058 return ret; 1059 } 1060 1061 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1062 "BS_%d : In beiscsi_open_conn, ep_cid=%d\n", 1063 beiscsi_ep->ep_cid); 1064 1065 phba->ep_array[BE_GET_CRI_FROM_CID 1066 (beiscsi_ep->ep_cid)] = ep; 1067 1068 beiscsi_ep->cid_vld = 0; 1069 1070 if (is_chip_be2_be3r(phba)) 1071 req_memsize = sizeof(struct tcp_connect_and_offload_in); 1072 else 1073 req_memsize = sizeof(struct tcp_connect_and_offload_in_v1); 1074 1075 nonemb_cmd.va = dma_alloc_coherent(&phba->ctrl.pdev->dev, 1076 req_memsize, 1077 &nonemb_cmd.dma, GFP_KERNEL); 1078 if (nonemb_cmd.va == NULL) { 1079 1080 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 1081 "BS_%d : Failed to allocate memory for" 1082 " mgmt_open_connection\n"); 1083 1084 beiscsi_free_ep(beiscsi_ep); 1085 return -ENOMEM; 1086 } 1087 nonemb_cmd.size = req_memsize; 1088 memset(nonemb_cmd.va, 0, nonemb_cmd.size); 1089 tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd); 1090 if (!tag) { 1091 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 1092 "BS_%d : mgmt_open_connection Failed for cid=%d\n", 1093 beiscsi_ep->ep_cid); 1094 1095 dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size, 1096 nonemb_cmd.va, nonemb_cmd.dma); 1097 beiscsi_free_ep(beiscsi_ep); 1098 return -EAGAIN; 1099 } 1100 1101 ret = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd); 1102 if (ret) { 1103 beiscsi_log(phba, KERN_ERR, 1104 BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX, 1105 "BS_%d : mgmt_open_connection Failed"); 1106 1107 if (ret != -EBUSY) 1108 dma_free_coherent(&phba->ctrl.pdev->dev, 1109 nonemb_cmd.size, nonemb_cmd.va, 1110 nonemb_cmd.dma); 1111 1112 beiscsi_free_ep(beiscsi_ep); 1113 return ret; 1114 } 1115 1116 ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va; 1117 beiscsi_ep = ep->dd_data; 1118 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle; 1119 beiscsi_ep->cid_vld = 1; 1120 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1121 "BS_%d : mgmt_open_connection Success\n"); 1122 1123 dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size, 1124 nonemb_cmd.va, nonemb_cmd.dma); 1125 return 0; 1126 } 1127 1128 /** 1129 * beiscsi_ep_connect - Ask chip to create TCP Conn 1130 * @scsi_host: Pointer to scsi_host structure 1131 * @dst_addr: The IP address of Target 1132 * @non_blocking: blocking or non-blocking call 1133 * 1134 * This routines first asks chip to create a connection and then allocates an EP 1135 */ 1136 struct iscsi_endpoint * 1137 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 1138 int non_blocking) 1139 { 1140 struct beiscsi_hba *phba; 1141 struct beiscsi_endpoint *beiscsi_ep; 1142 struct iscsi_endpoint *ep; 1143 int ret; 1144 1145 if (!shost) { 1146 ret = -ENXIO; 1147 pr_err("beiscsi_ep_connect shost is NULL\n"); 1148 return ERR_PTR(ret); 1149 } 1150 1151 phba = iscsi_host_priv(shost); 1152 if (!beiscsi_hba_is_online(phba)) { 1153 ret = -EIO; 1154 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1155 "BS_%d : HBA in error 0x%lx\n", phba->state); 1156 return ERR_PTR(ret); 1157 } 1158 if (!test_bit(BEISCSI_HBA_LINK_UP, &phba->state)) { 1159 ret = -EBUSY; 1160 beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG, 1161 "BS_%d : The Adapter Port state is Down!!!\n"); 1162 return ERR_PTR(ret); 1163 } 1164 1165 ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint)); 1166 if (!ep) { 1167 ret = -ENOMEM; 1168 return ERR_PTR(ret); 1169 } 1170 1171 beiscsi_ep = ep->dd_data; 1172 beiscsi_ep->phba = phba; 1173 beiscsi_ep->openiscsi_ep = ep; 1174 ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking); 1175 if (ret) { 1176 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 1177 "BS_%d : Failed in beiscsi_open_conn\n"); 1178 goto free_ep; 1179 } 1180 1181 return ep; 1182 1183 free_ep: 1184 iscsi_destroy_endpoint(ep); 1185 return ERR_PTR(ret); 1186 } 1187 1188 /** 1189 * beiscsi_ep_poll - Poll to see if connection is established 1190 * @ep: endpoint to be used 1191 * @timeout_ms: timeout specified in millisecs 1192 * 1193 * Poll to see if TCP connection established 1194 */ 1195 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 1196 { 1197 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 1198 1199 beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1200 "BS_%d : In beiscsi_ep_poll\n"); 1201 1202 if (beiscsi_ep->cid_vld == 1) 1203 return 1; 1204 else 1205 return 0; 1206 } 1207 1208 /** 1209 * beiscsi_flush_cq()- Flush the CQ created. 1210 * @phba: ptr device priv structure. 1211 * 1212 * Before the connection resource are freed flush 1213 * all the CQ enteries 1214 **/ 1215 static void beiscsi_flush_cq(struct beiscsi_hba *phba) 1216 { 1217 uint16_t i; 1218 struct be_eq_obj *pbe_eq; 1219 struct hwi_controller *phwi_ctrlr; 1220 struct hwi_context_memory *phwi_context; 1221 1222 phwi_ctrlr = phba->phwi_ctrlr; 1223 phwi_context = phwi_ctrlr->phwi_ctxt; 1224 1225 for (i = 0; i < phba->num_cpus; i++) { 1226 pbe_eq = &phwi_context->be_eq[i]; 1227 irq_poll_disable(&pbe_eq->iopoll); 1228 beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC); 1229 irq_poll_enable(&pbe_eq->iopoll); 1230 } 1231 } 1232 1233 /** 1234 * beiscsi_conn_close - Invalidate and upload connection 1235 * @ep: The iscsi endpoint 1236 * 1237 * Returns 0 on success, -1 on failure. 1238 */ 1239 static int beiscsi_conn_close(struct beiscsi_endpoint *beiscsi_ep) 1240 { 1241 struct beiscsi_hba *phba = beiscsi_ep->phba; 1242 unsigned int tag, attempts; 1243 int ret; 1244 1245 /** 1246 * Without successfully invalidating and uploading connection 1247 * driver can't reuse the CID so attempt more than once. 1248 */ 1249 attempts = 0; 1250 while (attempts++ < 3) { 1251 tag = beiscsi_invalidate_cxn(phba, beiscsi_ep); 1252 if (tag) { 1253 ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL); 1254 if (!ret) 1255 break; 1256 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1257 "BS_%d : invalidate conn failed cid %d\n", 1258 beiscsi_ep->ep_cid); 1259 } 1260 } 1261 1262 /* wait for all completions to arrive, then process them */ 1263 msleep(250); 1264 /* flush CQ entries */ 1265 beiscsi_flush_cq(phba); 1266 1267 if (attempts > 3) 1268 return -1; 1269 1270 attempts = 0; 1271 while (attempts++ < 3) { 1272 tag = beiscsi_upload_cxn(phba, beiscsi_ep); 1273 if (tag) { 1274 ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL); 1275 if (!ret) 1276 break; 1277 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1278 "BS_%d : upload conn failed cid %d\n", 1279 beiscsi_ep->ep_cid); 1280 } 1281 } 1282 if (attempts > 3) 1283 return -1; 1284 1285 return 0; 1286 } 1287 1288 /** 1289 * beiscsi_ep_disconnect - Tears down the TCP connection 1290 * @ep: endpoint to be used 1291 * 1292 * Tears down the TCP connection 1293 */ 1294 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) 1295 { 1296 struct beiscsi_endpoint *beiscsi_ep; 1297 struct beiscsi_conn *beiscsi_conn; 1298 struct beiscsi_hba *phba; 1299 uint16_t cri_index; 1300 1301 beiscsi_ep = ep->dd_data; 1302 phba = beiscsi_ep->phba; 1303 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1304 "BS_%d : In beiscsi_ep_disconnect for ep_cid = %u\n", 1305 beiscsi_ep->ep_cid); 1306 1307 cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid); 1308 if (!phba->ep_array[cri_index]) { 1309 __beiscsi_log(phba, KERN_ERR, 1310 "BS_%d : ep_array at %u cid %u empty\n", 1311 cri_index, 1312 beiscsi_ep->ep_cid); 1313 return; 1314 } 1315 1316 if (beiscsi_ep->conn) { 1317 beiscsi_conn = beiscsi_ep->conn; 1318 iscsi_suspend_queue(beiscsi_conn->conn); 1319 } 1320 1321 if (!beiscsi_hba_is_online(phba)) { 1322 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1323 "BS_%d : HBA in error 0x%lx\n", phba->state); 1324 } else { 1325 /** 1326 * Make CID available even if close fails. 1327 * If not freed, FW might fail open using the CID. 1328 */ 1329 if (beiscsi_conn_close(beiscsi_ep) < 0) 1330 __beiscsi_log(phba, KERN_ERR, 1331 "BS_%d : close conn failed cid %d\n", 1332 beiscsi_ep->ep_cid); 1333 } 1334 1335 beiscsi_free_ep(beiscsi_ep); 1336 if (!phba->conn_table[cri_index]) 1337 __beiscsi_log(phba, KERN_ERR, 1338 "BS_%d : conn_table empty at %u: cid %u\n", 1339 cri_index, beiscsi_ep->ep_cid); 1340 phba->conn_table[cri_index] = NULL; 1341 iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep); 1342 } 1343 1344 umode_t beiscsi_attr_is_visible(int param_type, int param) 1345 { 1346 switch (param_type) { 1347 case ISCSI_NET_PARAM: 1348 switch (param) { 1349 case ISCSI_NET_PARAM_IFACE_ENABLE: 1350 case ISCSI_NET_PARAM_IPV4_ADDR: 1351 case ISCSI_NET_PARAM_IPV4_SUBNET: 1352 case ISCSI_NET_PARAM_IPV4_BOOTPROTO: 1353 case ISCSI_NET_PARAM_IPV4_GW: 1354 case ISCSI_NET_PARAM_IPV6_ADDR: 1355 case ISCSI_NET_PARAM_VLAN_ID: 1356 case ISCSI_NET_PARAM_VLAN_PRIORITY: 1357 case ISCSI_NET_PARAM_VLAN_ENABLED: 1358 return S_IRUGO; 1359 default: 1360 return 0; 1361 } 1362 case ISCSI_HOST_PARAM: 1363 switch (param) { 1364 case ISCSI_HOST_PARAM_HWADDRESS: 1365 case ISCSI_HOST_PARAM_INITIATOR_NAME: 1366 case ISCSI_HOST_PARAM_PORT_STATE: 1367 case ISCSI_HOST_PARAM_PORT_SPEED: 1368 return S_IRUGO; 1369 default: 1370 return 0; 1371 } 1372 case ISCSI_PARAM: 1373 switch (param) { 1374 case ISCSI_PARAM_MAX_RECV_DLENGTH: 1375 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 1376 case ISCSI_PARAM_HDRDGST_EN: 1377 case ISCSI_PARAM_DATADGST_EN: 1378 case ISCSI_PARAM_CONN_ADDRESS: 1379 case ISCSI_PARAM_CONN_PORT: 1380 case ISCSI_PARAM_EXP_STATSN: 1381 case ISCSI_PARAM_PERSISTENT_ADDRESS: 1382 case ISCSI_PARAM_PERSISTENT_PORT: 1383 case ISCSI_PARAM_PING_TMO: 1384 case ISCSI_PARAM_RECV_TMO: 1385 case ISCSI_PARAM_INITIAL_R2T_EN: 1386 case ISCSI_PARAM_MAX_R2T: 1387 case ISCSI_PARAM_IMM_DATA_EN: 1388 case ISCSI_PARAM_FIRST_BURST: 1389 case ISCSI_PARAM_MAX_BURST: 1390 case ISCSI_PARAM_PDU_INORDER_EN: 1391 case ISCSI_PARAM_DATASEQ_INORDER_EN: 1392 case ISCSI_PARAM_ERL: 1393 case ISCSI_PARAM_TARGET_NAME: 1394 case ISCSI_PARAM_TPGT: 1395 case ISCSI_PARAM_USERNAME: 1396 case ISCSI_PARAM_PASSWORD: 1397 case ISCSI_PARAM_USERNAME_IN: 1398 case ISCSI_PARAM_PASSWORD_IN: 1399 case ISCSI_PARAM_FAST_ABORT: 1400 case ISCSI_PARAM_ABORT_TMO: 1401 case ISCSI_PARAM_LU_RESET_TMO: 1402 case ISCSI_PARAM_IFACE_NAME: 1403 case ISCSI_PARAM_INITIATOR_NAME: 1404 return S_IRUGO; 1405 default: 1406 return 0; 1407 } 1408 } 1409 1410 return 0; 1411 } 1412