1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * This file is part of the Emulex Linux Device Driver for Enterprise iSCSI 4 * Host Bus Adapters. Refer to the README file included with this package 5 * for driver version and adapter compatibility. 6 * 7 * Copyright (c) 2018 Broadcom. All Rights Reserved. 8 * The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries. 9 * 10 * Contact Information: 11 * linux-drivers@broadcom.com 12 */ 13 14 #include <scsi/libiscsi.h> 15 #include <scsi/scsi_transport_iscsi.h> 16 #include <scsi/scsi_transport.h> 17 #include <scsi/scsi_cmnd.h> 18 #include <scsi/scsi_device.h> 19 #include <scsi/scsi_host.h> 20 #include <scsi/scsi_netlink.h> 21 #include <net/netlink.h> 22 #include <scsi/scsi.h> 23 24 #include "be_iscsi.h" 25 26 extern struct iscsi_transport beiscsi_iscsi_transport; 27 28 /** 29 * beiscsi_session_create - creates a new iscsi session 30 * @cmds_max: max commands supported 31 * @qdepth: max queue depth supported 32 * @initial_cmdsn: initial iscsi CMDSN 33 */ 34 struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep, 35 u16 cmds_max, 36 u16 qdepth, 37 u32 initial_cmdsn) 38 { 39 struct Scsi_Host *shost; 40 struct beiscsi_endpoint *beiscsi_ep; 41 struct iscsi_cls_session *cls_session; 42 struct beiscsi_hba *phba; 43 struct iscsi_session *sess; 44 struct beiscsi_session *beiscsi_sess; 45 struct beiscsi_io_task *io_task; 46 47 48 if (!ep) { 49 pr_err("beiscsi_session_create: invalid ep\n"); 50 return NULL; 51 } 52 beiscsi_ep = ep->dd_data; 53 phba = beiscsi_ep->phba; 54 55 if (!beiscsi_hba_is_online(phba)) { 56 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 57 "BS_%d : HBA in error 0x%lx\n", phba->state); 58 return NULL; 59 } 60 61 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 62 "BS_%d : In beiscsi_session_create\n"); 63 if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) { 64 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 65 "BS_%d : Cannot handle %d cmds." 66 "Max cmds per session supported is %d. Using %d." 67 "\n", cmds_max, 68 beiscsi_ep->phba->params.wrbs_per_cxn, 69 beiscsi_ep->phba->params.wrbs_per_cxn); 70 71 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn; 72 } 73 74 shost = phba->shost; 75 cls_session = iscsi_session_setup(&beiscsi_iscsi_transport, 76 shost, cmds_max, 77 sizeof(*beiscsi_sess), 78 sizeof(*io_task), 79 initial_cmdsn, ISCSI_MAX_TARGET); 80 if (!cls_session) 81 return NULL; 82 sess = cls_session->dd_data; 83 beiscsi_sess = sess->dd_data; 84 beiscsi_sess->bhs_pool = dma_pool_create("beiscsi_bhs_pool", 85 &phba->pcidev->dev, 86 sizeof(struct be_cmd_bhs), 87 64, 0); 88 if (!beiscsi_sess->bhs_pool) 89 goto destroy_sess; 90 91 return cls_session; 92 destroy_sess: 93 iscsi_session_teardown(cls_session); 94 return NULL; 95 } 96 97 /** 98 * beiscsi_session_destroy - destroys iscsi session 99 * @cls_session: pointer to iscsi cls session 100 * 101 * Destroys iSCSI session instance and releases 102 * resources allocated for it. 103 */ 104 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session) 105 { 106 struct iscsi_session *sess = cls_session->dd_data; 107 struct beiscsi_session *beiscsi_sess = sess->dd_data; 108 109 printk(KERN_INFO "In beiscsi_session_destroy\n"); 110 dma_pool_destroy(beiscsi_sess->bhs_pool); 111 iscsi_session_teardown(cls_session); 112 } 113 114 /** 115 * beiscsi_session_fail(): Closing session with appropriate error 116 * @cls_session: ptr to session 117 **/ 118 void beiscsi_session_fail(struct iscsi_cls_session *cls_session) 119 { 120 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED); 121 } 122 123 124 /** 125 * beiscsi_conn_create - create an instance of iscsi connection 126 * @cls_session: ptr to iscsi_cls_session 127 * @cid: iscsi cid 128 */ 129 struct iscsi_cls_conn * 130 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid) 131 { 132 struct beiscsi_hba *phba; 133 struct Scsi_Host *shost; 134 struct iscsi_cls_conn *cls_conn; 135 struct beiscsi_conn *beiscsi_conn; 136 struct iscsi_conn *conn; 137 struct iscsi_session *sess; 138 struct beiscsi_session *beiscsi_sess; 139 140 shost = iscsi_session_to_shost(cls_session); 141 phba = iscsi_host_priv(shost); 142 143 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 144 "BS_%d : In beiscsi_conn_create ,cid" 145 "from iscsi layer=%d\n", cid); 146 147 cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid); 148 if (!cls_conn) 149 return NULL; 150 151 conn = cls_conn->dd_data; 152 beiscsi_conn = conn->dd_data; 153 beiscsi_conn->ep = NULL; 154 beiscsi_conn->phba = phba; 155 beiscsi_conn->conn = conn; 156 sess = cls_session->dd_data; 157 beiscsi_sess = sess->dd_data; 158 beiscsi_conn->beiscsi_sess = beiscsi_sess; 159 return cls_conn; 160 } 161 162 /** 163 * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection 164 * @cls_session: pointer to iscsi cls session 165 * @cls_conn: pointer to iscsi cls conn 166 * @transport_fd: EP handle(64 bit) 167 * 168 * This function binds the TCP Conn with iSCSI Connection and Session. 169 */ 170 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session, 171 struct iscsi_cls_conn *cls_conn, 172 u64 transport_fd, int is_leading) 173 { 174 struct iscsi_conn *conn = cls_conn->dd_data; 175 struct beiscsi_conn *beiscsi_conn = conn->dd_data; 176 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 177 struct beiscsi_hba *phba = iscsi_host_priv(shost); 178 struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr; 179 struct hwi_wrb_context *pwrb_context; 180 struct beiscsi_endpoint *beiscsi_ep; 181 struct iscsi_endpoint *ep; 182 uint16_t cri_index; 183 184 ep = iscsi_lookup_endpoint(transport_fd); 185 if (!ep) 186 return -EINVAL; 187 188 beiscsi_ep = ep->dd_data; 189 190 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) 191 return -EINVAL; 192 193 if (beiscsi_ep->phba != phba) { 194 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 195 "BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n", 196 beiscsi_ep->phba, phba); 197 198 return -EEXIST; 199 } 200 cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid); 201 if (phba->conn_table[cri_index]) { 202 if (beiscsi_conn != phba->conn_table[cri_index] || 203 beiscsi_ep != phba->conn_table[cri_index]->ep) { 204 __beiscsi_log(phba, KERN_ERR, 205 "BS_%d : conn_table not empty at %u: cid %u conn %p:%p\n", 206 cri_index, 207 beiscsi_ep->ep_cid, 208 beiscsi_conn, 209 phba->conn_table[cri_index]); 210 return -EINVAL; 211 } 212 } 213 214 beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid; 215 beiscsi_conn->ep = beiscsi_ep; 216 beiscsi_ep->conn = beiscsi_conn; 217 /** 218 * Each connection is associated with a WRBQ kept in wrb_context. 219 * Store doorbell offset for transmit path. 220 */ 221 pwrb_context = &phwi_ctrlr->wrb_context[cri_index]; 222 beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset; 223 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 224 "BS_%d : cid %d phba->conn_table[%u]=%p\n", 225 beiscsi_ep->ep_cid, cri_index, beiscsi_conn); 226 phba->conn_table[cri_index] = beiscsi_conn; 227 return 0; 228 } 229 230 static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba) 231 { 232 if (phba->ipv4_iface) 233 return 0; 234 235 phba->ipv4_iface = iscsi_create_iface(phba->shost, 236 &beiscsi_iscsi_transport, 237 ISCSI_IFACE_TYPE_IPV4, 238 0, 0); 239 if (!phba->ipv4_iface) { 240 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 241 "BS_%d : Could not " 242 "create default IPv4 address.\n"); 243 return -ENODEV; 244 } 245 246 return 0; 247 } 248 249 static int beiscsi_iface_create_ipv6(struct beiscsi_hba *phba) 250 { 251 if (phba->ipv6_iface) 252 return 0; 253 254 phba->ipv6_iface = iscsi_create_iface(phba->shost, 255 &beiscsi_iscsi_transport, 256 ISCSI_IFACE_TYPE_IPV6, 257 0, 0); 258 if (!phba->ipv6_iface) { 259 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 260 "BS_%d : Could not " 261 "create default IPv6 address.\n"); 262 return -ENODEV; 263 } 264 265 return 0; 266 } 267 268 void beiscsi_iface_create_default(struct beiscsi_hba *phba) 269 { 270 struct be_cmd_get_if_info_resp *if_info; 271 272 if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) { 273 beiscsi_iface_create_ipv4(phba); 274 kfree(if_info); 275 } 276 277 if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) { 278 beiscsi_iface_create_ipv6(phba); 279 kfree(if_info); 280 } 281 } 282 283 void beiscsi_iface_destroy_default(struct beiscsi_hba *phba) 284 { 285 if (phba->ipv6_iface) { 286 iscsi_destroy_iface(phba->ipv6_iface); 287 phba->ipv6_iface = NULL; 288 } 289 if (phba->ipv4_iface) { 290 iscsi_destroy_iface(phba->ipv4_iface); 291 phba->ipv4_iface = NULL; 292 } 293 } 294 295 /** 296 * beiscsi_set_vlan_tag()- Set the VLAN TAG 297 * @shost: Scsi Host for the driver instance 298 * @iface_param: Interface paramters 299 * 300 * Set the VLAN TAG for the adapter or disable 301 * the VLAN config 302 * 303 * returns 304 * Success: 0 305 * Failure: Non-Zero Value 306 **/ 307 static int 308 beiscsi_iface_config_vlan(struct Scsi_Host *shost, 309 struct iscsi_iface_param_info *iface_param) 310 { 311 struct beiscsi_hba *phba = iscsi_host_priv(shost); 312 int ret = -EPERM; 313 314 switch (iface_param->param) { 315 case ISCSI_NET_PARAM_VLAN_ENABLED: 316 ret = 0; 317 if (iface_param->value[0] != ISCSI_VLAN_ENABLE) 318 ret = beiscsi_if_set_vlan(phba, BEISCSI_VLAN_DISABLE); 319 break; 320 case ISCSI_NET_PARAM_VLAN_TAG: 321 ret = beiscsi_if_set_vlan(phba, 322 *((uint16_t *)iface_param->value)); 323 break; 324 } 325 return ret; 326 } 327 328 329 static int 330 beiscsi_iface_config_ipv4(struct Scsi_Host *shost, 331 struct iscsi_iface_param_info *info, 332 void *data, uint32_t dt_len) 333 { 334 struct beiscsi_hba *phba = iscsi_host_priv(shost); 335 u8 *ip = NULL, *subnet = NULL, *gw; 336 struct nlattr *nla; 337 int ret = -EPERM; 338 339 /* Check the param */ 340 switch (info->param) { 341 case ISCSI_NET_PARAM_IFACE_ENABLE: 342 if (info->value[0] == ISCSI_IFACE_ENABLE) 343 ret = beiscsi_iface_create_ipv4(phba); 344 else { 345 iscsi_destroy_iface(phba->ipv4_iface); 346 phba->ipv4_iface = NULL; 347 } 348 break; 349 case ISCSI_NET_PARAM_IPV4_GW: 350 gw = info->value; 351 ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw); 352 break; 353 case ISCSI_NET_PARAM_IPV4_BOOTPROTO: 354 if (info->value[0] == ISCSI_BOOTPROTO_DHCP) 355 ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4); 356 else if (info->value[0] == ISCSI_BOOTPROTO_STATIC) 357 /* release DHCP IP address */ 358 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4, 359 NULL, NULL); 360 else 361 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 362 "BS_%d : Invalid BOOTPROTO: %d\n", 363 info->value[0]); 364 break; 365 case ISCSI_NET_PARAM_IPV4_ADDR: 366 ip = info->value; 367 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_SUBNET); 368 if (nla) { 369 info = nla_data(nla); 370 subnet = info->value; 371 } 372 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4, 373 ip, subnet); 374 break; 375 case ISCSI_NET_PARAM_IPV4_SUBNET: 376 /* 377 * OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR ioctl needs IP 378 * and subnet both. Find IP to be applied for this subnet. 379 */ 380 subnet = info->value; 381 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_ADDR); 382 if (nla) { 383 info = nla_data(nla); 384 ip = info->value; 385 } 386 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4, 387 ip, subnet); 388 break; 389 } 390 391 return ret; 392 } 393 394 static int 395 beiscsi_iface_config_ipv6(struct Scsi_Host *shost, 396 struct iscsi_iface_param_info *iface_param, 397 void *data, uint32_t dt_len) 398 { 399 struct beiscsi_hba *phba = iscsi_host_priv(shost); 400 int ret = -EPERM; 401 402 switch (iface_param->param) { 403 case ISCSI_NET_PARAM_IFACE_ENABLE: 404 if (iface_param->value[0] == ISCSI_IFACE_ENABLE) 405 ret = beiscsi_iface_create_ipv6(phba); 406 else { 407 iscsi_destroy_iface(phba->ipv6_iface); 408 phba->ipv6_iface = NULL; 409 } 410 break; 411 case ISCSI_NET_PARAM_IPV6_ADDR: 412 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6, 413 iface_param->value, NULL); 414 break; 415 } 416 417 return ret; 418 } 419 420 int beiscsi_iface_set_param(struct Scsi_Host *shost, 421 void *data, uint32_t dt_len) 422 { 423 struct iscsi_iface_param_info *iface_param = NULL; 424 struct beiscsi_hba *phba = iscsi_host_priv(shost); 425 struct nlattr *attrib; 426 uint32_t rm_len = dt_len; 427 int ret; 428 429 if (!beiscsi_hba_is_online(phba)) { 430 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 431 "BS_%d : HBA in error 0x%lx\n", phba->state); 432 return -EBUSY; 433 } 434 435 /* update interface_handle */ 436 ret = beiscsi_if_get_handle(phba); 437 if (ret) { 438 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 439 "BS_%d : Getting Interface Handle Failed\n"); 440 return ret; 441 } 442 443 nla_for_each_attr(attrib, data, dt_len, rm_len) { 444 iface_param = nla_data(attrib); 445 446 if (iface_param->param_type != ISCSI_NET_PARAM) 447 continue; 448 449 /* 450 * BE2ISCSI only supports 1 interface 451 */ 452 if (iface_param->iface_num) { 453 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 454 "BS_%d : Invalid iface_num %d." 455 "Only iface_num 0 is supported.\n", 456 iface_param->iface_num); 457 458 return -EINVAL; 459 } 460 461 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 462 "BS_%d : %s.0 set param %d", 463 (iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ? 464 "ipv4" : "ipv6", iface_param->param); 465 466 ret = -EPERM; 467 switch (iface_param->param) { 468 case ISCSI_NET_PARAM_VLAN_ENABLED: 469 case ISCSI_NET_PARAM_VLAN_TAG: 470 ret = beiscsi_iface_config_vlan(shost, iface_param); 471 break; 472 default: 473 switch (iface_param->iface_type) { 474 case ISCSI_IFACE_TYPE_IPV4: 475 ret = beiscsi_iface_config_ipv4(shost, 476 iface_param, 477 data, dt_len); 478 break; 479 case ISCSI_IFACE_TYPE_IPV6: 480 ret = beiscsi_iface_config_ipv6(shost, 481 iface_param, 482 data, dt_len); 483 break; 484 } 485 } 486 487 if (ret == -EPERM) { 488 __beiscsi_log(phba, KERN_ERR, 489 "BS_%d : %s.0 set param %d not permitted", 490 (iface_param->iface_type == 491 ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6", 492 iface_param->param); 493 ret = 0; 494 } 495 if (ret) 496 break; 497 } 498 499 return ret; 500 } 501 502 static int __beiscsi_iface_get_param(struct beiscsi_hba *phba, 503 struct iscsi_iface *iface, 504 int param, char *buf) 505 { 506 struct be_cmd_get_if_info_resp *if_info; 507 int len, ip_type = BEISCSI_IP_TYPE_V4; 508 509 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) 510 ip_type = BEISCSI_IP_TYPE_V6; 511 512 len = beiscsi_if_get_info(phba, ip_type, &if_info); 513 if (len) 514 return len; 515 516 switch (param) { 517 case ISCSI_NET_PARAM_IPV4_ADDR: 518 len = sprintf(buf, "%pI4\n", if_info->ip_addr.addr); 519 break; 520 case ISCSI_NET_PARAM_IPV6_ADDR: 521 len = sprintf(buf, "%pI6\n", if_info->ip_addr.addr); 522 break; 523 case ISCSI_NET_PARAM_IPV4_BOOTPROTO: 524 if (!if_info->dhcp_state) 525 len = sprintf(buf, "static\n"); 526 else 527 len = sprintf(buf, "dhcp\n"); 528 break; 529 case ISCSI_NET_PARAM_IPV4_SUBNET: 530 len = sprintf(buf, "%pI4\n", if_info->ip_addr.subnet_mask); 531 break; 532 case ISCSI_NET_PARAM_VLAN_ENABLED: 533 len = sprintf(buf, "%s\n", 534 (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ? 535 "disable" : "enable"); 536 break; 537 case ISCSI_NET_PARAM_VLAN_ID: 538 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) 539 len = -EINVAL; 540 else 541 len = sprintf(buf, "%d\n", 542 (if_info->vlan_priority & 543 ISCSI_MAX_VLAN_ID)); 544 break; 545 case ISCSI_NET_PARAM_VLAN_PRIORITY: 546 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) 547 len = -EINVAL; 548 else 549 len = sprintf(buf, "%d\n", 550 ((if_info->vlan_priority >> 13) & 551 ISCSI_MAX_VLAN_PRIORITY)); 552 break; 553 default: 554 WARN_ON(1); 555 } 556 557 kfree(if_info); 558 return len; 559 } 560 561 int beiscsi_iface_get_param(struct iscsi_iface *iface, 562 enum iscsi_param_type param_type, 563 int param, char *buf) 564 { 565 struct Scsi_Host *shost = iscsi_iface_to_shost(iface); 566 struct beiscsi_hba *phba = iscsi_host_priv(shost); 567 struct be_cmd_get_def_gateway_resp gateway; 568 int len = -EPERM; 569 570 if (param_type != ISCSI_NET_PARAM) 571 return 0; 572 if (!beiscsi_hba_is_online(phba)) { 573 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 574 "BS_%d : HBA in error 0x%lx\n", phba->state); 575 return -EBUSY; 576 } 577 578 switch (param) { 579 case ISCSI_NET_PARAM_IPV4_ADDR: 580 case ISCSI_NET_PARAM_IPV4_SUBNET: 581 case ISCSI_NET_PARAM_IPV4_BOOTPROTO: 582 case ISCSI_NET_PARAM_IPV6_ADDR: 583 case ISCSI_NET_PARAM_VLAN_ENABLED: 584 case ISCSI_NET_PARAM_VLAN_ID: 585 case ISCSI_NET_PARAM_VLAN_PRIORITY: 586 len = __beiscsi_iface_get_param(phba, iface, param, buf); 587 break; 588 case ISCSI_NET_PARAM_IFACE_ENABLE: 589 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) 590 len = sprintf(buf, "%s\n", 591 phba->ipv4_iface ? "enable" : "disable"); 592 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) 593 len = sprintf(buf, "%s\n", 594 phba->ipv6_iface ? "enable" : "disable"); 595 break; 596 case ISCSI_NET_PARAM_IPV4_GW: 597 memset(&gateway, 0, sizeof(gateway)); 598 len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway); 599 if (!len) 600 len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr); 601 break; 602 } 603 604 return len; 605 } 606 607 /** 608 * beiscsi_ep_get_param - get the iscsi parameter 609 * @ep: pointer to iscsi ep 610 * @param: parameter type identifier 611 * @buf: buffer pointer 612 * 613 * returns iscsi parameter 614 */ 615 int beiscsi_ep_get_param(struct iscsi_endpoint *ep, 616 enum iscsi_param param, char *buf) 617 { 618 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 619 int len; 620 621 beiscsi_log(beiscsi_ep->phba, KERN_INFO, 622 BEISCSI_LOG_CONFIG, 623 "BS_%d : In beiscsi_ep_get_param," 624 " param= %d\n", param); 625 626 switch (param) { 627 case ISCSI_PARAM_CONN_PORT: 628 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport); 629 break; 630 case ISCSI_PARAM_CONN_ADDRESS: 631 if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4) 632 len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr); 633 else 634 len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr); 635 break; 636 default: 637 len = -EPERM; 638 } 639 return len; 640 } 641 642 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn, 643 enum iscsi_param param, char *buf, int buflen) 644 { 645 struct iscsi_conn *conn = cls_conn->dd_data; 646 struct iscsi_session *session = conn->session; 647 struct beiscsi_hba *phba = NULL; 648 int ret; 649 650 phba = ((struct beiscsi_conn *)conn->dd_data)->phba; 651 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 652 "BS_%d : In beiscsi_conn_set_param," 653 " param= %d\n", param); 654 655 ret = iscsi_set_param(cls_conn, param, buf, buflen); 656 if (ret) 657 return ret; 658 /* 659 * If userspace tried to set the value to higher than we can 660 * support override here. 661 */ 662 switch (param) { 663 case ISCSI_PARAM_FIRST_BURST: 664 if (session->first_burst > 8192) 665 session->first_burst = 8192; 666 break; 667 case ISCSI_PARAM_MAX_RECV_DLENGTH: 668 if (conn->max_recv_dlength > 65536) 669 conn->max_recv_dlength = 65536; 670 break; 671 case ISCSI_PARAM_MAX_BURST: 672 if (session->max_burst > 262144) 673 session->max_burst = 262144; 674 break; 675 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 676 if (conn->max_xmit_dlength > 65536) 677 conn->max_xmit_dlength = 65536; 678 /* fall through */ 679 default: 680 return 0; 681 } 682 683 return 0; 684 } 685 686 /** 687 * beiscsi_get_port_state - Get the Port State 688 * @shost : pointer to scsi_host structure 689 * 690 */ 691 static void beiscsi_get_port_state(struct Scsi_Host *shost) 692 { 693 struct beiscsi_hba *phba = iscsi_host_priv(shost); 694 struct iscsi_cls_host *ihost = shost->shost_data; 695 696 ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ? 697 ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN; 698 } 699 700 /** 701 * beiscsi_get_port_speed - Get the Port Speed from Adapter 702 * @shost : pointer to scsi_host structure 703 * 704 */ 705 static void beiscsi_get_port_speed(struct Scsi_Host *shost) 706 { 707 struct beiscsi_hba *phba = iscsi_host_priv(shost); 708 struct iscsi_cls_host *ihost = shost->shost_data; 709 710 switch (phba->port_speed) { 711 case BE2ISCSI_LINK_SPEED_10MBPS: 712 ihost->port_speed = ISCSI_PORT_SPEED_10MBPS; 713 break; 714 case BE2ISCSI_LINK_SPEED_100MBPS: 715 ihost->port_speed = ISCSI_PORT_SPEED_100MBPS; 716 break; 717 case BE2ISCSI_LINK_SPEED_1GBPS: 718 ihost->port_speed = ISCSI_PORT_SPEED_1GBPS; 719 break; 720 case BE2ISCSI_LINK_SPEED_10GBPS: 721 ihost->port_speed = ISCSI_PORT_SPEED_10GBPS; 722 break; 723 case BE2ISCSI_LINK_SPEED_25GBPS: 724 ihost->port_speed = ISCSI_PORT_SPEED_25GBPS; 725 break; 726 case BE2ISCSI_LINK_SPEED_40GBPS: 727 ihost->port_speed = ISCSI_PORT_SPEED_40GBPS; 728 break; 729 default: 730 ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN; 731 } 732 } 733 734 /** 735 * beiscsi_get_host_param - get the iscsi parameter 736 * @shost: pointer to scsi_host structure 737 * @param: parameter type identifier 738 * @buf: buffer pointer 739 * 740 */ 741 int beiscsi_get_host_param(struct Scsi_Host *shost, 742 enum iscsi_host_param param, char *buf) 743 { 744 struct beiscsi_hba *phba = iscsi_host_priv(shost); 745 int status = 0; 746 747 if (!beiscsi_hba_is_online(phba)) { 748 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 749 "BS_%d : HBA in error 0x%lx\n", phba->state); 750 return 0; 751 } 752 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 753 "BS_%d : In beiscsi_get_host_param, param = %d\n", param); 754 755 switch (param) { 756 case ISCSI_HOST_PARAM_HWADDRESS: 757 status = beiscsi_get_macaddr(buf, phba); 758 if (status < 0) { 759 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 760 "BS_%d : beiscsi_get_macaddr Failed\n"); 761 return 0; 762 } 763 break; 764 case ISCSI_HOST_PARAM_INITIATOR_NAME: 765 /* try fetching user configured name first */ 766 status = beiscsi_get_initiator_name(phba, buf, true); 767 if (status < 0) { 768 status = beiscsi_get_initiator_name(phba, buf, false); 769 if (status < 0) { 770 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 771 "BS_%d : Retrieving Initiator Name Failed\n"); 772 status = 0; 773 } 774 } 775 break; 776 case ISCSI_HOST_PARAM_PORT_STATE: 777 beiscsi_get_port_state(shost); 778 status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost)); 779 break; 780 case ISCSI_HOST_PARAM_PORT_SPEED: 781 beiscsi_get_port_speed(shost); 782 status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost)); 783 break; 784 default: 785 return iscsi_host_get_param(shost, param, buf); 786 } 787 return status; 788 } 789 790 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba) 791 { 792 struct be_cmd_get_nic_conf_resp resp; 793 int rc; 794 795 if (phba->mac_addr_set) 796 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN); 797 798 memset(&resp, 0, sizeof(resp)); 799 rc = mgmt_get_nic_conf(phba, &resp); 800 if (rc) 801 return rc; 802 803 phba->mac_addr_set = true; 804 memcpy(phba->mac_address, resp.mac_address, ETH_ALEN); 805 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN); 806 } 807 808 /** 809 * beiscsi_conn_get_stats - get the iscsi stats 810 * @cls_conn: pointer to iscsi cls conn 811 * @stats: pointer to iscsi_stats structure 812 * 813 * returns iscsi stats 814 */ 815 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 816 struct iscsi_stats *stats) 817 { 818 struct iscsi_conn *conn = cls_conn->dd_data; 819 struct beiscsi_hba *phba = NULL; 820 821 phba = ((struct beiscsi_conn *)conn->dd_data)->phba; 822 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 823 "BS_%d : In beiscsi_conn_get_stats\n"); 824 825 stats->txdata_octets = conn->txdata_octets; 826 stats->rxdata_octets = conn->rxdata_octets; 827 stats->dataout_pdus = conn->dataout_pdus_cnt; 828 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 829 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 830 stats->datain_pdus = conn->datain_pdus_cnt; 831 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 832 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 833 stats->r2t_pdus = conn->r2t_pdus_cnt; 834 stats->digest_err = 0; 835 stats->timeout_err = 0; 836 stats->custom_length = 1; 837 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 838 stats->custom[0].value = conn->eh_abort_cnt; 839 } 840 841 /** 842 * beiscsi_set_params_for_offld - get the parameters for offload 843 * @beiscsi_conn: pointer to beiscsi_conn 844 * @params: pointer to offload_params structure 845 */ 846 static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn, 847 struct beiscsi_offload_params *params) 848 { 849 struct iscsi_conn *conn = beiscsi_conn->conn; 850 struct iscsi_session *session = conn->session; 851 852 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length, 853 params, session->max_burst); 854 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 855 max_send_data_segment_length, params, 856 conn->max_xmit_dlength); 857 AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length, 858 params, session->first_burst); 859 AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params, 860 session->erl); 861 AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params, 862 conn->datadgst_en); 863 AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params, 864 conn->hdrdgst_en); 865 AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params, 866 session->initial_r2t_en); 867 AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params, 868 session->imm_data_en); 869 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 870 data_seq_inorder, params, 871 session->dataseq_inorder_en); 872 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 873 pdu_seq_inorder, params, 874 session->pdu_inorder_en); 875 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params, 876 session->max_r2t); 877 AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params, 878 (conn->exp_statsn - 1)); 879 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 880 max_recv_data_segment_length, params, 881 conn->max_recv_dlength); 882 883 } 884 885 /** 886 * beiscsi_conn_start - offload of session to chip 887 * @cls_conn: pointer to beiscsi_conn 888 */ 889 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) 890 { 891 struct iscsi_conn *conn = cls_conn->dd_data; 892 struct beiscsi_conn *beiscsi_conn = conn->dd_data; 893 struct beiscsi_endpoint *beiscsi_ep; 894 struct beiscsi_offload_params params; 895 struct beiscsi_hba *phba; 896 897 phba = ((struct beiscsi_conn *)conn->dd_data)->phba; 898 899 if (!beiscsi_hba_is_online(phba)) { 900 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 901 "BS_%d : HBA in error 0x%lx\n", phba->state); 902 return -EBUSY; 903 } 904 beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG, 905 "BS_%d : In beiscsi_conn_start\n"); 906 907 memset(¶ms, 0, sizeof(struct beiscsi_offload_params)); 908 beiscsi_ep = beiscsi_conn->ep; 909 if (!beiscsi_ep) 910 beiscsi_log(beiscsi_conn->phba, KERN_ERR, 911 BEISCSI_LOG_CONFIG, 912 "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n"); 913 914 beiscsi_conn->login_in_progress = 0; 915 beiscsi_set_params_for_offld(beiscsi_conn, ¶ms); 916 beiscsi_offload_connection(beiscsi_conn, ¶ms); 917 iscsi_conn_start(cls_conn); 918 return 0; 919 } 920 921 /** 922 * beiscsi_get_cid - Allocate a cid 923 * @phba: The phba instance 924 */ 925 static int beiscsi_get_cid(struct beiscsi_hba *phba) 926 { 927 uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1; 928 unsigned short cid, cid_from_ulp; 929 struct ulp_cid_info *cid_info; 930 931 /* Find the ULP which has more CID available */ 932 cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ? 933 BEISCSI_ULP0_AVLBL_CID(phba) : 0; 934 cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ? 935 BEISCSI_ULP1_AVLBL_CID(phba) : 0; 936 cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ? 937 BEISCSI_ULP0 : BEISCSI_ULP1; 938 /** 939 * If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp 940 * is ZERO for both, ULP 1 is returned. 941 * Check if ULP is loaded before getting new CID. 942 */ 943 if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported)) 944 return BE_INVALID_CID; 945 946 cid_info = phba->cid_array_info[cid_from_ulp]; 947 cid = cid_info->cid_array[cid_info->cid_alloc]; 948 if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) { 949 __beiscsi_log(phba, KERN_ERR, 950 "BS_%d : failed to get cid: available %u:%u\n", 951 cid_info->avlbl_cids, cid_info->cid_free); 952 return BE_INVALID_CID; 953 } 954 /* empty the slot */ 955 cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID; 956 if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp)) 957 cid_info->cid_alloc = 0; 958 cid_info->avlbl_cids--; 959 return cid; 960 } 961 962 /** 963 * beiscsi_put_cid - Free the cid 964 * @phba: The phba for which the cid is being freed 965 * @cid: The cid to free 966 */ 967 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) 968 { 969 uint16_t cri_index = BE_GET_CRI_FROM_CID(cid); 970 struct hwi_wrb_context *pwrb_context; 971 struct hwi_controller *phwi_ctrlr; 972 struct ulp_cid_info *cid_info; 973 uint16_t cid_post_ulp; 974 975 phwi_ctrlr = phba->phwi_ctrlr; 976 pwrb_context = &phwi_ctrlr->wrb_context[cri_index]; 977 cid_post_ulp = pwrb_context->ulp_num; 978 979 cid_info = phba->cid_array_info[cid_post_ulp]; 980 /* fill only in empty slot */ 981 if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) { 982 __beiscsi_log(phba, KERN_ERR, 983 "BS_%d : failed to put cid %u: available %u:%u\n", 984 cid, cid_info->avlbl_cids, cid_info->cid_free); 985 return; 986 } 987 cid_info->cid_array[cid_info->cid_free++] = cid; 988 if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp)) 989 cid_info->cid_free = 0; 990 cid_info->avlbl_cids++; 991 } 992 993 /** 994 * beiscsi_free_ep - free endpoint 995 * @ep: pointer to iscsi endpoint structure 996 */ 997 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) 998 { 999 struct beiscsi_hba *phba = beiscsi_ep->phba; 1000 struct beiscsi_conn *beiscsi_conn; 1001 1002 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 1003 beiscsi_ep->phba = NULL; 1004 /* clear this to track freeing in beiscsi_ep_disconnect */ 1005 phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL; 1006 1007 /** 1008 * Check if any connection resource allocated by driver 1009 * is to be freed.This case occurs when target redirection 1010 * or connection retry is done. 1011 **/ 1012 if (!beiscsi_ep->conn) 1013 return; 1014 1015 beiscsi_conn = beiscsi_ep->conn; 1016 /** 1017 * Break ep->conn link here so that completions after 1018 * this are ignored. 1019 */ 1020 beiscsi_ep->conn = NULL; 1021 if (beiscsi_conn->login_in_progress) { 1022 beiscsi_free_mgmt_task_handles(beiscsi_conn, 1023 beiscsi_conn->task); 1024 beiscsi_conn->login_in_progress = 0; 1025 } 1026 } 1027 1028 /** 1029 * beiscsi_open_conn - Ask FW to open a TCP connection 1030 * @ep: endpoint to be used 1031 * @src_addr: The source IP address 1032 * @dst_addr: The Destination IP address 1033 * 1034 * Asks the FW to open a TCP connection 1035 */ 1036 static int beiscsi_open_conn(struct iscsi_endpoint *ep, 1037 struct sockaddr *src_addr, 1038 struct sockaddr *dst_addr, int non_blocking) 1039 { 1040 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 1041 struct beiscsi_hba *phba = beiscsi_ep->phba; 1042 struct tcp_connect_and_offload_out *ptcpcnct_out; 1043 struct be_dma_mem nonemb_cmd; 1044 unsigned int tag, req_memsize; 1045 int ret = -ENOMEM; 1046 1047 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1048 "BS_%d : In beiscsi_open_conn\n"); 1049 1050 beiscsi_ep->ep_cid = beiscsi_get_cid(phba); 1051 if (beiscsi_ep->ep_cid == BE_INVALID_CID) { 1052 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 1053 "BS_%d : No free cid available\n"); 1054 return ret; 1055 } 1056 1057 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1058 "BS_%d : In beiscsi_open_conn, ep_cid=%d\n", 1059 beiscsi_ep->ep_cid); 1060 1061 phba->ep_array[BE_GET_CRI_FROM_CID 1062 (beiscsi_ep->ep_cid)] = ep; 1063 1064 beiscsi_ep->cid_vld = 0; 1065 1066 if (is_chip_be2_be3r(phba)) 1067 req_memsize = sizeof(struct tcp_connect_and_offload_in); 1068 else 1069 req_memsize = sizeof(struct tcp_connect_and_offload_in_v1); 1070 1071 nonemb_cmd.va = dma_alloc_coherent(&phba->ctrl.pdev->dev, 1072 req_memsize, 1073 &nonemb_cmd.dma, GFP_KERNEL); 1074 if (nonemb_cmd.va == NULL) { 1075 1076 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 1077 "BS_%d : Failed to allocate memory for" 1078 " mgmt_open_connection\n"); 1079 1080 beiscsi_free_ep(beiscsi_ep); 1081 return -ENOMEM; 1082 } 1083 nonemb_cmd.size = req_memsize; 1084 memset(nonemb_cmd.va, 0, nonemb_cmd.size); 1085 tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd); 1086 if (!tag) { 1087 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 1088 "BS_%d : mgmt_open_connection Failed for cid=%d\n", 1089 beiscsi_ep->ep_cid); 1090 1091 dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size, 1092 nonemb_cmd.va, nonemb_cmd.dma); 1093 beiscsi_free_ep(beiscsi_ep); 1094 return -EAGAIN; 1095 } 1096 1097 ret = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd); 1098 if (ret) { 1099 beiscsi_log(phba, KERN_ERR, 1100 BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX, 1101 "BS_%d : mgmt_open_connection Failed"); 1102 1103 if (ret != -EBUSY) 1104 dma_free_coherent(&phba->ctrl.pdev->dev, 1105 nonemb_cmd.size, nonemb_cmd.va, 1106 nonemb_cmd.dma); 1107 1108 beiscsi_free_ep(beiscsi_ep); 1109 return ret; 1110 } 1111 1112 ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va; 1113 beiscsi_ep = ep->dd_data; 1114 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle; 1115 beiscsi_ep->cid_vld = 1; 1116 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1117 "BS_%d : mgmt_open_connection Success\n"); 1118 1119 dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size, 1120 nonemb_cmd.va, nonemb_cmd.dma); 1121 return 0; 1122 } 1123 1124 /** 1125 * beiscsi_ep_connect - Ask chip to create TCP Conn 1126 * @scsi_host: Pointer to scsi_host structure 1127 * @dst_addr: The IP address of Target 1128 * @non_blocking: blocking or non-blocking call 1129 * 1130 * This routines first asks chip to create a connection and then allocates an EP 1131 */ 1132 struct iscsi_endpoint * 1133 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 1134 int non_blocking) 1135 { 1136 struct beiscsi_hba *phba; 1137 struct beiscsi_endpoint *beiscsi_ep; 1138 struct iscsi_endpoint *ep; 1139 int ret; 1140 1141 if (!shost) { 1142 ret = -ENXIO; 1143 pr_err("beiscsi_ep_connect shost is NULL\n"); 1144 return ERR_PTR(ret); 1145 } 1146 1147 phba = iscsi_host_priv(shost); 1148 if (!beiscsi_hba_is_online(phba)) { 1149 ret = -EIO; 1150 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1151 "BS_%d : HBA in error 0x%lx\n", phba->state); 1152 return ERR_PTR(ret); 1153 } 1154 if (!test_bit(BEISCSI_HBA_LINK_UP, &phba->state)) { 1155 ret = -EBUSY; 1156 beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG, 1157 "BS_%d : The Adapter Port state is Down!!!\n"); 1158 return ERR_PTR(ret); 1159 } 1160 1161 ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint)); 1162 if (!ep) { 1163 ret = -ENOMEM; 1164 return ERR_PTR(ret); 1165 } 1166 1167 beiscsi_ep = ep->dd_data; 1168 beiscsi_ep->phba = phba; 1169 beiscsi_ep->openiscsi_ep = ep; 1170 ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking); 1171 if (ret) { 1172 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 1173 "BS_%d : Failed in beiscsi_open_conn\n"); 1174 goto free_ep; 1175 } 1176 1177 return ep; 1178 1179 free_ep: 1180 iscsi_destroy_endpoint(ep); 1181 return ERR_PTR(ret); 1182 } 1183 1184 /** 1185 * beiscsi_ep_poll - Poll to see if connection is established 1186 * @ep: endpoint to be used 1187 * @timeout_ms: timeout specified in millisecs 1188 * 1189 * Poll to see if TCP connection established 1190 */ 1191 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 1192 { 1193 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 1194 1195 beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1196 "BS_%d : In beiscsi_ep_poll\n"); 1197 1198 if (beiscsi_ep->cid_vld == 1) 1199 return 1; 1200 else 1201 return 0; 1202 } 1203 1204 /** 1205 * beiscsi_flush_cq()- Flush the CQ created. 1206 * @phba: ptr device priv structure. 1207 * 1208 * Before the connection resource are freed flush 1209 * all the CQ enteries 1210 **/ 1211 static void beiscsi_flush_cq(struct beiscsi_hba *phba) 1212 { 1213 uint16_t i; 1214 struct be_eq_obj *pbe_eq; 1215 struct hwi_controller *phwi_ctrlr; 1216 struct hwi_context_memory *phwi_context; 1217 1218 phwi_ctrlr = phba->phwi_ctrlr; 1219 phwi_context = phwi_ctrlr->phwi_ctxt; 1220 1221 for (i = 0; i < phba->num_cpus; i++) { 1222 pbe_eq = &phwi_context->be_eq[i]; 1223 irq_poll_disable(&pbe_eq->iopoll); 1224 beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC); 1225 irq_poll_enable(&pbe_eq->iopoll); 1226 } 1227 } 1228 1229 /** 1230 * beiscsi_conn_close - Invalidate and upload connection 1231 * @ep: The iscsi endpoint 1232 * 1233 * Returns 0 on success, -1 on failure. 1234 */ 1235 static int beiscsi_conn_close(struct beiscsi_endpoint *beiscsi_ep) 1236 { 1237 struct beiscsi_hba *phba = beiscsi_ep->phba; 1238 unsigned int tag, attempts; 1239 int ret; 1240 1241 /** 1242 * Without successfully invalidating and uploading connection 1243 * driver can't reuse the CID so attempt more than once. 1244 */ 1245 attempts = 0; 1246 while (attempts++ < 3) { 1247 tag = beiscsi_invalidate_cxn(phba, beiscsi_ep); 1248 if (tag) { 1249 ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL); 1250 if (!ret) 1251 break; 1252 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1253 "BS_%d : invalidate conn failed cid %d\n", 1254 beiscsi_ep->ep_cid); 1255 } 1256 } 1257 1258 /* wait for all completions to arrive, then process them */ 1259 msleep(250); 1260 /* flush CQ entries */ 1261 beiscsi_flush_cq(phba); 1262 1263 if (attempts > 3) 1264 return -1; 1265 1266 attempts = 0; 1267 while (attempts++ < 3) { 1268 tag = beiscsi_upload_cxn(phba, beiscsi_ep); 1269 if (tag) { 1270 ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL); 1271 if (!ret) 1272 break; 1273 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1274 "BS_%d : upload conn failed cid %d\n", 1275 beiscsi_ep->ep_cid); 1276 } 1277 } 1278 if (attempts > 3) 1279 return -1; 1280 1281 return 0; 1282 } 1283 1284 /** 1285 * beiscsi_ep_disconnect - Tears down the TCP connection 1286 * @ep: endpoint to be used 1287 * 1288 * Tears down the TCP connection 1289 */ 1290 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) 1291 { 1292 struct beiscsi_endpoint *beiscsi_ep; 1293 struct beiscsi_conn *beiscsi_conn; 1294 struct beiscsi_hba *phba; 1295 uint16_t cri_index; 1296 1297 beiscsi_ep = ep->dd_data; 1298 phba = beiscsi_ep->phba; 1299 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1300 "BS_%d : In beiscsi_ep_disconnect for ep_cid = %u\n", 1301 beiscsi_ep->ep_cid); 1302 1303 cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid); 1304 if (!phba->ep_array[cri_index]) { 1305 __beiscsi_log(phba, KERN_ERR, 1306 "BS_%d : ep_array at %u cid %u empty\n", 1307 cri_index, 1308 beiscsi_ep->ep_cid); 1309 return; 1310 } 1311 1312 if (beiscsi_ep->conn) { 1313 beiscsi_conn = beiscsi_ep->conn; 1314 iscsi_suspend_queue(beiscsi_conn->conn); 1315 } 1316 1317 if (!beiscsi_hba_is_online(phba)) { 1318 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 1319 "BS_%d : HBA in error 0x%lx\n", phba->state); 1320 } else { 1321 /** 1322 * Make CID available even if close fails. 1323 * If not freed, FW might fail open using the CID. 1324 */ 1325 if (beiscsi_conn_close(beiscsi_ep) < 0) 1326 __beiscsi_log(phba, KERN_ERR, 1327 "BS_%d : close conn failed cid %d\n", 1328 beiscsi_ep->ep_cid); 1329 } 1330 1331 beiscsi_free_ep(beiscsi_ep); 1332 if (!phba->conn_table[cri_index]) 1333 __beiscsi_log(phba, KERN_ERR, 1334 "BS_%d : conn_table empty at %u: cid %u\n", 1335 cri_index, beiscsi_ep->ep_cid); 1336 phba->conn_table[cri_index] = NULL; 1337 iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep); 1338 } 1339 1340 umode_t beiscsi_attr_is_visible(int param_type, int param) 1341 { 1342 switch (param_type) { 1343 case ISCSI_NET_PARAM: 1344 switch (param) { 1345 case ISCSI_NET_PARAM_IFACE_ENABLE: 1346 case ISCSI_NET_PARAM_IPV4_ADDR: 1347 case ISCSI_NET_PARAM_IPV4_SUBNET: 1348 case ISCSI_NET_PARAM_IPV4_BOOTPROTO: 1349 case ISCSI_NET_PARAM_IPV4_GW: 1350 case ISCSI_NET_PARAM_IPV6_ADDR: 1351 case ISCSI_NET_PARAM_VLAN_ID: 1352 case ISCSI_NET_PARAM_VLAN_PRIORITY: 1353 case ISCSI_NET_PARAM_VLAN_ENABLED: 1354 return S_IRUGO; 1355 default: 1356 return 0; 1357 } 1358 case ISCSI_HOST_PARAM: 1359 switch (param) { 1360 case ISCSI_HOST_PARAM_HWADDRESS: 1361 case ISCSI_HOST_PARAM_INITIATOR_NAME: 1362 case ISCSI_HOST_PARAM_PORT_STATE: 1363 case ISCSI_HOST_PARAM_PORT_SPEED: 1364 return S_IRUGO; 1365 default: 1366 return 0; 1367 } 1368 case ISCSI_PARAM: 1369 switch (param) { 1370 case ISCSI_PARAM_MAX_RECV_DLENGTH: 1371 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 1372 case ISCSI_PARAM_HDRDGST_EN: 1373 case ISCSI_PARAM_DATADGST_EN: 1374 case ISCSI_PARAM_CONN_ADDRESS: 1375 case ISCSI_PARAM_CONN_PORT: 1376 case ISCSI_PARAM_EXP_STATSN: 1377 case ISCSI_PARAM_PERSISTENT_ADDRESS: 1378 case ISCSI_PARAM_PERSISTENT_PORT: 1379 case ISCSI_PARAM_PING_TMO: 1380 case ISCSI_PARAM_RECV_TMO: 1381 case ISCSI_PARAM_INITIAL_R2T_EN: 1382 case ISCSI_PARAM_MAX_R2T: 1383 case ISCSI_PARAM_IMM_DATA_EN: 1384 case ISCSI_PARAM_FIRST_BURST: 1385 case ISCSI_PARAM_MAX_BURST: 1386 case ISCSI_PARAM_PDU_INORDER_EN: 1387 case ISCSI_PARAM_DATASEQ_INORDER_EN: 1388 case ISCSI_PARAM_ERL: 1389 case ISCSI_PARAM_TARGET_NAME: 1390 case ISCSI_PARAM_TPGT: 1391 case ISCSI_PARAM_USERNAME: 1392 case ISCSI_PARAM_PASSWORD: 1393 case ISCSI_PARAM_USERNAME_IN: 1394 case ISCSI_PARAM_PASSWORD_IN: 1395 case ISCSI_PARAM_FAST_ABORT: 1396 case ISCSI_PARAM_ABORT_TMO: 1397 case ISCSI_PARAM_LU_RESET_TMO: 1398 case ISCSI_PARAM_IFACE_NAME: 1399 case ISCSI_PARAM_INITIATOR_NAME: 1400 return S_IRUGO; 1401 default: 1402 return 0; 1403 } 1404 } 1405 1406 return 0; 1407 } 1408