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 * @ep: pointer to iscsi ep 31 * @cmds_max: max commands supported 32 * @qdepth: max queue depth supported 33 * @initial_cmdsn: initial iscsi CMDSN 34 */ 35 struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep, 36 u16 cmds_max, 37 u16 qdepth, 38 u32 initial_cmdsn) 39 { 40 struct Scsi_Host *shost; 41 struct beiscsi_endpoint *beiscsi_ep; 42 struct iscsi_cls_session *cls_session; 43 struct beiscsi_hba *phba; 44 struct iscsi_session *sess; 45 struct beiscsi_session *beiscsi_sess; 46 struct beiscsi_io_task *io_task; 47 48 49 if (!ep) { 50 pr_err("beiscsi_session_create: invalid ep\n"); 51 return NULL; 52 } 53 beiscsi_ep = ep->dd_data; 54 phba = beiscsi_ep->phba; 55 56 if (!beiscsi_hba_is_online(phba)) { 57 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 58 "BS_%d : HBA in error 0x%lx\n", phba->state); 59 return NULL; 60 } 61 62 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 63 "BS_%d : In beiscsi_session_create\n"); 64 if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) { 65 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 66 "BS_%d : Cannot handle %d cmds." 67 "Max cmds per session supported is %d. Using %d." 68 "\n", cmds_max, 69 beiscsi_ep->phba->params.wrbs_per_cxn, 70 beiscsi_ep->phba->params.wrbs_per_cxn); 71 72 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn; 73 } 74 75 shost = phba->shost; 76 cls_session = iscsi_session_setup(&beiscsi_iscsi_transport, 77 shost, cmds_max, 78 sizeof(*beiscsi_sess), 79 sizeof(*io_task), 80 initial_cmdsn, ISCSI_MAX_TARGET); 81 if (!cls_session) 82 return NULL; 83 sess = cls_session->dd_data; 84 beiscsi_sess = sess->dd_data; 85 beiscsi_sess->bhs_pool = dma_pool_create("beiscsi_bhs_pool", 86 &phba->pcidev->dev, 87 sizeof(struct be_cmd_bhs), 88 64, 0); 89 if (!beiscsi_sess->bhs_pool) 90 goto destroy_sess; 91 92 return cls_session; 93 destroy_sess: 94 iscsi_session_teardown(cls_session); 95 return NULL; 96 } 97 98 /** 99 * beiscsi_session_destroy - destroys iscsi session 100 * @cls_session: pointer to iscsi cls session 101 * 102 * Destroys iSCSI session instance and releases 103 * resources allocated for it. 104 */ 105 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session) 106 { 107 struct iscsi_session *sess = cls_session->dd_data; 108 struct beiscsi_session *beiscsi_sess = sess->dd_data; 109 110 printk(KERN_INFO "In beiscsi_session_destroy\n"); 111 dma_pool_destroy(beiscsi_sess->bhs_pool); 112 iscsi_session_teardown(cls_session); 113 } 114 115 /** 116 * beiscsi_session_fail(): Closing session with appropriate error 117 * @cls_session: ptr to session 118 **/ 119 void beiscsi_session_fail(struct iscsi_cls_session *cls_session) 120 { 121 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED); 122 } 123 124 125 /** 126 * beiscsi_conn_create - create an instance of iscsi connection 127 * @cls_session: ptr to iscsi_cls_session 128 * @cid: iscsi cid 129 */ 130 struct iscsi_cls_conn * 131 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid) 132 { 133 struct beiscsi_hba *phba; 134 struct Scsi_Host *shost; 135 struct iscsi_cls_conn *cls_conn; 136 struct beiscsi_conn *beiscsi_conn; 137 struct iscsi_conn *conn; 138 struct iscsi_session *sess; 139 struct beiscsi_session *beiscsi_sess; 140 141 shost = iscsi_session_to_shost(cls_session); 142 phba = iscsi_host_priv(shost); 143 144 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 145 "BS_%d : In beiscsi_conn_create ,cid" 146 "from iscsi layer=%d\n", cid); 147 148 cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid); 149 if (!cls_conn) 150 return NULL; 151 152 conn = cls_conn->dd_data; 153 beiscsi_conn = conn->dd_data; 154 beiscsi_conn->ep = NULL; 155 beiscsi_conn->phba = phba; 156 beiscsi_conn->conn = conn; 157 sess = cls_session->dd_data; 158 beiscsi_sess = sess->dd_data; 159 beiscsi_conn->beiscsi_sess = beiscsi_sess; 160 return cls_conn; 161 } 162 163 /** 164 * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection 165 * @cls_session: pointer to iscsi cls session 166 * @cls_conn: pointer to iscsi cls conn 167 * @transport_fd: EP handle(64 bit) 168 * @is_leading: indicate if this is the session leading connection (MCS) 169 * 170 * This function binds the TCP Conn with iSCSI Connection and Session. 171 */ 172 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session, 173 struct iscsi_cls_conn *cls_conn, 174 u64 transport_fd, int is_leading) 175 { 176 struct iscsi_conn *conn = cls_conn->dd_data; 177 struct beiscsi_conn *beiscsi_conn = conn->dd_data; 178 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 179 struct beiscsi_hba *phba = iscsi_host_priv(shost); 180 struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr; 181 struct hwi_wrb_context *pwrb_context; 182 struct beiscsi_endpoint *beiscsi_ep; 183 struct iscsi_endpoint *ep; 184 uint16_t cri_index; 185 186 ep = iscsi_lookup_endpoint(transport_fd); 187 if (!ep) 188 return -EINVAL; 189 190 beiscsi_ep = ep->dd_data; 191 192 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) 193 return -EINVAL; 194 195 if (beiscsi_ep->phba != phba) { 196 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 197 "BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n", 198 beiscsi_ep->phba, phba); 199 200 return -EEXIST; 201 } 202 cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid); 203 if (phba->conn_table[cri_index]) { 204 if (beiscsi_conn != phba->conn_table[cri_index] || 205 beiscsi_ep != phba->conn_table[cri_index]->ep) { 206 __beiscsi_log(phba, KERN_ERR, 207 "BS_%d : conn_table not empty at %u: cid %u conn %p:%p\n", 208 cri_index, 209 beiscsi_ep->ep_cid, 210 beiscsi_conn, 211 phba->conn_table[cri_index]); 212 return -EINVAL; 213 } 214 } 215 216 beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid; 217 beiscsi_conn->ep = beiscsi_ep; 218 beiscsi_ep->conn = beiscsi_conn; 219 /** 220 * Each connection is associated with a WRBQ kept in wrb_context. 221 * Store doorbell offset for transmit path. 222 */ 223 pwrb_context = &phwi_ctrlr->wrb_context[cri_index]; 224 beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset; 225 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 226 "BS_%d : cid %d phba->conn_table[%u]=%p\n", 227 beiscsi_ep->ep_cid, cri_index, beiscsi_conn); 228 phba->conn_table[cri_index] = beiscsi_conn; 229 return 0; 230 } 231 232 static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba) 233 { 234 if (phba->ipv4_iface) 235 return 0; 236 237 phba->ipv4_iface = iscsi_create_iface(phba->shost, 238 &beiscsi_iscsi_transport, 239 ISCSI_IFACE_TYPE_IPV4, 240 0, 0); 241 if (!phba->ipv4_iface) { 242 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 243 "BS_%d : Could not " 244 "create default IPv4 address.\n"); 245 return -ENODEV; 246 } 247 248 return 0; 249 } 250 251 static int beiscsi_iface_create_ipv6(struct beiscsi_hba *phba) 252 { 253 if (phba->ipv6_iface) 254 return 0; 255 256 phba->ipv6_iface = iscsi_create_iface(phba->shost, 257 &beiscsi_iscsi_transport, 258 ISCSI_IFACE_TYPE_IPV6, 259 0, 0); 260 if (!phba->ipv6_iface) { 261 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 262 "BS_%d : Could not " 263 "create default IPv6 address.\n"); 264 return -ENODEV; 265 } 266 267 return 0; 268 } 269 270 void beiscsi_iface_create_default(struct beiscsi_hba *phba) 271 { 272 struct be_cmd_get_if_info_resp *if_info; 273 274 if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) { 275 beiscsi_iface_create_ipv4(phba); 276 kfree(if_info); 277 } 278 279 if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) { 280 beiscsi_iface_create_ipv6(phba); 281 kfree(if_info); 282 } 283 } 284 285 void beiscsi_iface_destroy_default(struct beiscsi_hba *phba) 286 { 287 if (phba->ipv6_iface) { 288 iscsi_destroy_iface(phba->ipv6_iface); 289 phba->ipv6_iface = NULL; 290 } 291 if (phba->ipv4_iface) { 292 iscsi_destroy_iface(phba->ipv4_iface); 293 phba->ipv4_iface = NULL; 294 } 295 } 296 297 /** 298 * beiscsi_set_vlan_tag()- Set the VLAN TAG 299 * @shost: Scsi Host for the driver instance 300 * @iface_param: Interface paramters 301 * 302 * Set the VLAN TAG for the adapter or disable 303 * the VLAN config 304 * 305 * returns 306 * Success: 0 307 * Failure: Non-Zero Value 308 **/ 309 static int 310 beiscsi_iface_config_vlan(struct Scsi_Host *shost, 311 struct iscsi_iface_param_info *iface_param) 312 { 313 struct beiscsi_hba *phba = iscsi_host_priv(shost); 314 int ret = -EPERM; 315 316 switch (iface_param->param) { 317 case ISCSI_NET_PARAM_VLAN_ENABLED: 318 ret = 0; 319 if (iface_param->value[0] != ISCSI_VLAN_ENABLE) 320 ret = beiscsi_if_set_vlan(phba, BEISCSI_VLAN_DISABLE); 321 break; 322 case ISCSI_NET_PARAM_VLAN_TAG: 323 ret = beiscsi_if_set_vlan(phba, 324 *((uint16_t *)iface_param->value)); 325 break; 326 } 327 return ret; 328 } 329 330 331 static int 332 beiscsi_iface_config_ipv4(struct Scsi_Host *shost, 333 struct iscsi_iface_param_info *info, 334 void *data, uint32_t dt_len) 335 { 336 struct beiscsi_hba *phba = iscsi_host_priv(shost); 337 u8 *ip = NULL, *subnet = NULL, *gw; 338 struct nlattr *nla; 339 int ret = -EPERM; 340 341 /* Check the param */ 342 switch (info->param) { 343 case ISCSI_NET_PARAM_IFACE_ENABLE: 344 if (info->value[0] == ISCSI_IFACE_ENABLE) 345 ret = beiscsi_iface_create_ipv4(phba); 346 else { 347 iscsi_destroy_iface(phba->ipv4_iface); 348 phba->ipv4_iface = NULL; 349 } 350 break; 351 case ISCSI_NET_PARAM_IPV4_GW: 352 gw = info->value; 353 ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw); 354 break; 355 case ISCSI_NET_PARAM_IPV4_BOOTPROTO: 356 if (info->value[0] == ISCSI_BOOTPROTO_DHCP) 357 ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4); 358 else if (info->value[0] == ISCSI_BOOTPROTO_STATIC) 359 /* release DHCP IP address */ 360 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4, 361 NULL, NULL); 362 else 363 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 364 "BS_%d : Invalid BOOTPROTO: %d\n", 365 info->value[0]); 366 break; 367 case ISCSI_NET_PARAM_IPV4_ADDR: 368 ip = info->value; 369 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_SUBNET); 370 if (nla) { 371 info = nla_data(nla); 372 subnet = info->value; 373 } 374 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4, 375 ip, subnet); 376 break; 377 case ISCSI_NET_PARAM_IPV4_SUBNET: 378 /* 379 * OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR ioctl needs IP 380 * and subnet both. Find IP to be applied for this subnet. 381 */ 382 subnet = info->value; 383 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_ADDR); 384 if (nla) { 385 info = nla_data(nla); 386 ip = info->value; 387 } 388 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4, 389 ip, subnet); 390 break; 391 } 392 393 return ret; 394 } 395 396 static int 397 beiscsi_iface_config_ipv6(struct Scsi_Host *shost, 398 struct iscsi_iface_param_info *iface_param, 399 void *data, uint32_t dt_len) 400 { 401 struct beiscsi_hba *phba = iscsi_host_priv(shost); 402 int ret = -EPERM; 403 404 switch (iface_param->param) { 405 case ISCSI_NET_PARAM_IFACE_ENABLE: 406 if (iface_param->value[0] == ISCSI_IFACE_ENABLE) 407 ret = beiscsi_iface_create_ipv6(phba); 408 else { 409 iscsi_destroy_iface(phba->ipv6_iface); 410 phba->ipv6_iface = NULL; 411 } 412 break; 413 case ISCSI_NET_PARAM_IPV6_ADDR: 414 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6, 415 iface_param->value, NULL); 416 break; 417 } 418 419 return ret; 420 } 421 422 int beiscsi_iface_set_param(struct Scsi_Host *shost, 423 void *data, uint32_t dt_len) 424 { 425 struct iscsi_iface_param_info *iface_param = NULL; 426 struct beiscsi_hba *phba = iscsi_host_priv(shost); 427 struct nlattr *attrib; 428 uint32_t rm_len = dt_len; 429 int ret; 430 431 if (!beiscsi_hba_is_online(phba)) { 432 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 433 "BS_%d : HBA in error 0x%lx\n", phba->state); 434 return -EBUSY; 435 } 436 437 /* update interface_handle */ 438 ret = beiscsi_if_get_handle(phba); 439 if (ret) { 440 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 441 "BS_%d : Getting Interface Handle Failed\n"); 442 return ret; 443 } 444 445 nla_for_each_attr(attrib, data, dt_len, rm_len) { 446 iface_param = nla_data(attrib); 447 448 if (iface_param->param_type != ISCSI_NET_PARAM) 449 continue; 450 451 /* 452 * BE2ISCSI only supports 1 interface 453 */ 454 if (iface_param->iface_num) { 455 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 456 "BS_%d : Invalid iface_num %d." 457 "Only iface_num 0 is supported.\n", 458 iface_param->iface_num); 459 460 return -EINVAL; 461 } 462 463 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 464 "BS_%d : %s.0 set param %d", 465 (iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ? 466 "ipv4" : "ipv6", iface_param->param); 467 468 ret = -EPERM; 469 switch (iface_param->param) { 470 case ISCSI_NET_PARAM_VLAN_ENABLED: 471 case ISCSI_NET_PARAM_VLAN_TAG: 472 ret = beiscsi_iface_config_vlan(shost, iface_param); 473 break; 474 default: 475 switch (iface_param->iface_type) { 476 case ISCSI_IFACE_TYPE_IPV4: 477 ret = beiscsi_iface_config_ipv4(shost, 478 iface_param, 479 data, dt_len); 480 break; 481 case ISCSI_IFACE_TYPE_IPV6: 482 ret = beiscsi_iface_config_ipv6(shost, 483 iface_param, 484 data, dt_len); 485 break; 486 } 487 } 488 489 if (ret == -EPERM) { 490 __beiscsi_log(phba, KERN_ERR, 491 "BS_%d : %s.0 set param %d not permitted", 492 (iface_param->iface_type == 493 ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6", 494 iface_param->param); 495 ret = 0; 496 } 497 if (ret) 498 break; 499 } 500 501 return ret; 502 } 503 504 static int __beiscsi_iface_get_param(struct beiscsi_hba *phba, 505 struct iscsi_iface *iface, 506 int param, char *buf) 507 { 508 struct be_cmd_get_if_info_resp *if_info; 509 int len, ip_type = BEISCSI_IP_TYPE_V4; 510 511 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) 512 ip_type = BEISCSI_IP_TYPE_V6; 513 514 len = beiscsi_if_get_info(phba, ip_type, &if_info); 515 if (len) 516 return len; 517 518 switch (param) { 519 case ISCSI_NET_PARAM_IPV4_ADDR: 520 len = sprintf(buf, "%pI4\n", if_info->ip_addr.addr); 521 break; 522 case ISCSI_NET_PARAM_IPV6_ADDR: 523 len = sprintf(buf, "%pI6\n", if_info->ip_addr.addr); 524 break; 525 case ISCSI_NET_PARAM_IPV4_BOOTPROTO: 526 if (!if_info->dhcp_state) 527 len = sprintf(buf, "static\n"); 528 else 529 len = sprintf(buf, "dhcp\n"); 530 break; 531 case ISCSI_NET_PARAM_IPV4_SUBNET: 532 len = sprintf(buf, "%pI4\n", if_info->ip_addr.subnet_mask); 533 break; 534 case ISCSI_NET_PARAM_VLAN_ENABLED: 535 len = sprintf(buf, "%s\n", 536 (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ? 537 "disable" : "enable"); 538 break; 539 case ISCSI_NET_PARAM_VLAN_ID: 540 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) 541 len = -EINVAL; 542 else 543 len = sprintf(buf, "%d\n", 544 (if_info->vlan_priority & 545 ISCSI_MAX_VLAN_ID)); 546 break; 547 case ISCSI_NET_PARAM_VLAN_PRIORITY: 548 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) 549 len = -EINVAL; 550 else 551 len = sprintf(buf, "%d\n", 552 ((if_info->vlan_priority >> 13) & 553 ISCSI_MAX_VLAN_PRIORITY)); 554 break; 555 default: 556 WARN_ON(1); 557 } 558 559 kfree(if_info); 560 return len; 561 } 562 563 int beiscsi_iface_get_param(struct iscsi_iface *iface, 564 enum iscsi_param_type param_type, 565 int param, char *buf) 566 { 567 struct Scsi_Host *shost = iscsi_iface_to_shost(iface); 568 struct beiscsi_hba *phba = iscsi_host_priv(shost); 569 struct be_cmd_get_def_gateway_resp gateway; 570 int len = -EPERM; 571 572 if (param_type != ISCSI_NET_PARAM) 573 return 0; 574 if (!beiscsi_hba_is_online(phba)) { 575 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 576 "BS_%d : HBA in error 0x%lx\n", phba->state); 577 return -EBUSY; 578 } 579 580 switch (param) { 581 case ISCSI_NET_PARAM_IPV4_ADDR: 582 case ISCSI_NET_PARAM_IPV4_SUBNET: 583 case ISCSI_NET_PARAM_IPV4_BOOTPROTO: 584 case ISCSI_NET_PARAM_IPV6_ADDR: 585 case ISCSI_NET_PARAM_VLAN_ENABLED: 586 case ISCSI_NET_PARAM_VLAN_ID: 587 case ISCSI_NET_PARAM_VLAN_PRIORITY: 588 len = __beiscsi_iface_get_param(phba, iface, param, buf); 589 break; 590 case ISCSI_NET_PARAM_IFACE_ENABLE: 591 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) 592 len = sprintf(buf, "%s\n", 593 phba->ipv4_iface ? "enable" : "disable"); 594 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) 595 len = sprintf(buf, "%s\n", 596 phba->ipv6_iface ? "enable" : "disable"); 597 break; 598 case ISCSI_NET_PARAM_IPV4_GW: 599 memset(&gateway, 0, sizeof(gateway)); 600 len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway); 601 if (!len) 602 len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr); 603 break; 604 } 605 606 return len; 607 } 608 609 /** 610 * beiscsi_ep_get_param - get the iscsi parameter 611 * @ep: pointer to iscsi ep 612 * @param: parameter type identifier 613 * @buf: buffer pointer 614 * 615 * returns iscsi parameter 616 */ 617 int beiscsi_ep_get_param(struct iscsi_endpoint *ep, 618 enum iscsi_param param, char *buf) 619 { 620 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data; 621 int len; 622 623 beiscsi_log(beiscsi_ep->phba, KERN_INFO, 624 BEISCSI_LOG_CONFIG, 625 "BS_%d : In beiscsi_ep_get_param," 626 " param= %d\n", param); 627 628 switch (param) { 629 case ISCSI_PARAM_CONN_PORT: 630 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport); 631 break; 632 case ISCSI_PARAM_CONN_ADDRESS: 633 if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4) 634 len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr); 635 else 636 len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr); 637 break; 638 default: 639 len = -EPERM; 640 } 641 return len; 642 } 643 644 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn, 645 enum iscsi_param param, char *buf, int buflen) 646 { 647 struct iscsi_conn *conn = cls_conn->dd_data; 648 struct iscsi_session *session = conn->session; 649 struct beiscsi_hba *phba = NULL; 650 int ret; 651 652 phba = ((struct beiscsi_conn *)conn->dd_data)->phba; 653 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 654 "BS_%d : In beiscsi_conn_set_param," 655 " param= %d\n", param); 656 657 ret = iscsi_set_param(cls_conn, param, buf, buflen); 658 if (ret) 659 return ret; 660 /* 661 * If userspace tried to set the value to higher than we can 662 * support override here. 663 */ 664 switch (param) { 665 case ISCSI_PARAM_FIRST_BURST: 666 if (session->first_burst > 8192) 667 session->first_burst = 8192; 668 break; 669 case ISCSI_PARAM_MAX_RECV_DLENGTH: 670 if (conn->max_recv_dlength > 65536) 671 conn->max_recv_dlength = 65536; 672 break; 673 case ISCSI_PARAM_MAX_BURST: 674 if (session->max_burst > 262144) 675 session->max_burst = 262144; 676 break; 677 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 678 if (conn->max_xmit_dlength > 65536) 679 conn->max_xmit_dlength = 65536; 680 fallthrough; 681 default: 682 return 0; 683 } 684 685 return 0; 686 } 687 688 /** 689 * beiscsi_get_port_state - Get the Port State 690 * @shost : pointer to scsi_host structure 691 * 692 */ 693 static void beiscsi_get_port_state(struct Scsi_Host *shost) 694 { 695 struct beiscsi_hba *phba = iscsi_host_priv(shost); 696 struct iscsi_cls_host *ihost = shost->shost_data; 697 698 ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ? 699 ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN; 700 } 701 702 /** 703 * beiscsi_get_port_speed - Get the Port Speed from Adapter 704 * @shost : pointer to scsi_host structure 705 * 706 */ 707 static void beiscsi_get_port_speed(struct Scsi_Host *shost) 708 { 709 struct beiscsi_hba *phba = iscsi_host_priv(shost); 710 struct iscsi_cls_host *ihost = shost->shost_data; 711 712 switch (phba->port_speed) { 713 case BE2ISCSI_LINK_SPEED_10MBPS: 714 ihost->port_speed = ISCSI_PORT_SPEED_10MBPS; 715 break; 716 case BE2ISCSI_LINK_SPEED_100MBPS: 717 ihost->port_speed = ISCSI_PORT_SPEED_100MBPS; 718 break; 719 case BE2ISCSI_LINK_SPEED_1GBPS: 720 ihost->port_speed = ISCSI_PORT_SPEED_1GBPS; 721 break; 722 case BE2ISCSI_LINK_SPEED_10GBPS: 723 ihost->port_speed = ISCSI_PORT_SPEED_10GBPS; 724 break; 725 case BE2ISCSI_LINK_SPEED_25GBPS: 726 ihost->port_speed = ISCSI_PORT_SPEED_25GBPS; 727 break; 728 case BE2ISCSI_LINK_SPEED_40GBPS: 729 ihost->port_speed = ISCSI_PORT_SPEED_40GBPS; 730 break; 731 default: 732 ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN; 733 } 734 } 735 736 /** 737 * beiscsi_get_host_param - get the iscsi parameter 738 * @shost: pointer to scsi_host structure 739 * @param: parameter type identifier 740 * @buf: buffer pointer 741 * 742 */ 743 int beiscsi_get_host_param(struct Scsi_Host *shost, 744 enum iscsi_host_param param, char *buf) 745 { 746 struct beiscsi_hba *phba = iscsi_host_priv(shost); 747 int status = 0; 748 749 if (!beiscsi_hba_is_online(phba)) { 750 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 751 "BS_%d : HBA in error 0x%lx\n", phba->state); 752 return 0; 753 } 754 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 755 "BS_%d : In beiscsi_get_host_param, param = %d\n", param); 756 757 switch (param) { 758 case ISCSI_HOST_PARAM_HWADDRESS: 759 status = beiscsi_get_macaddr(buf, phba); 760 if (status < 0) { 761 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 762 "BS_%d : beiscsi_get_macaddr Failed\n"); 763 return 0; 764 } 765 break; 766 case ISCSI_HOST_PARAM_INITIATOR_NAME: 767 /* try fetching user configured name first */ 768 status = beiscsi_get_initiator_name(phba, buf, true); 769 if (status < 0) { 770 status = beiscsi_get_initiator_name(phba, buf, false); 771 if (status < 0) { 772 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, 773 "BS_%d : Retrieving Initiator Name Failed\n"); 774 status = 0; 775 } 776 } 777 break; 778 case ISCSI_HOST_PARAM_PORT_STATE: 779 beiscsi_get_port_state(shost); 780 status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost)); 781 break; 782 case ISCSI_HOST_PARAM_PORT_SPEED: 783 beiscsi_get_port_speed(shost); 784 status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost)); 785 break; 786 default: 787 return iscsi_host_get_param(shost, param, buf); 788 } 789 return status; 790 } 791 792 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba) 793 { 794 struct be_cmd_get_nic_conf_resp resp; 795 int rc; 796 797 if (phba->mac_addr_set) 798 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN); 799 800 memset(&resp, 0, sizeof(resp)); 801 rc = mgmt_get_nic_conf(phba, &resp); 802 if (rc) 803 return rc; 804 805 phba->mac_addr_set = true; 806 memcpy(phba->mac_address, resp.mac_address, ETH_ALEN); 807 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN); 808 } 809 810 /** 811 * beiscsi_conn_get_stats - get the iscsi stats 812 * @cls_conn: pointer to iscsi cls conn 813 * @stats: pointer to iscsi_stats structure 814 * 815 * returns iscsi stats 816 */ 817 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 818 struct iscsi_stats *stats) 819 { 820 struct iscsi_conn *conn = cls_conn->dd_data; 821 struct beiscsi_hba *phba = NULL; 822 823 phba = ((struct beiscsi_conn *)conn->dd_data)->phba; 824 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 825 "BS_%d : In beiscsi_conn_get_stats\n"); 826 827 stats->txdata_octets = conn->txdata_octets; 828 stats->rxdata_octets = conn->rxdata_octets; 829 stats->dataout_pdus = conn->dataout_pdus_cnt; 830 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 831 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 832 stats->datain_pdus = conn->datain_pdus_cnt; 833 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 834 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 835 stats->r2t_pdus = conn->r2t_pdus_cnt; 836 stats->digest_err = 0; 837 stats->timeout_err = 0; 838 stats->custom_length = 1; 839 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 840 stats->custom[0].value = conn->eh_abort_cnt; 841 } 842 843 /** 844 * beiscsi_set_params_for_offld - get the parameters for offload 845 * @beiscsi_conn: pointer to beiscsi_conn 846 * @params: pointer to offload_params structure 847 */ 848 static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn, 849 struct beiscsi_offload_params *params) 850 { 851 struct iscsi_conn *conn = beiscsi_conn->conn; 852 struct iscsi_session *session = conn->session; 853 854 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length, 855 params, session->max_burst); 856 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 857 max_send_data_segment_length, params, 858 conn->max_xmit_dlength); 859 AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length, 860 params, session->first_burst); 861 AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params, 862 session->erl); 863 AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params, 864 conn->datadgst_en); 865 AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params, 866 conn->hdrdgst_en); 867 AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params, 868 session->initial_r2t_en); 869 AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params, 870 session->imm_data_en); 871 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 872 data_seq_inorder, params, 873 session->dataseq_inorder_en); 874 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 875 pdu_seq_inorder, params, 876 session->pdu_inorder_en); 877 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params, 878 session->max_r2t); 879 AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params, 880 (conn->exp_statsn - 1)); 881 AMAP_SET_BITS(struct amap_beiscsi_offload_params, 882 max_recv_data_segment_length, params, 883 conn->max_recv_dlength); 884 885 } 886 887 /** 888 * beiscsi_conn_start - offload of session to chip 889 * @cls_conn: pointer to beiscsi_conn 890 */ 891 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) 892 { 893 struct iscsi_conn *conn = cls_conn->dd_data; 894 struct beiscsi_conn *beiscsi_conn = conn->dd_data; 895 struct beiscsi_endpoint *beiscsi_ep; 896 struct beiscsi_offload_params params; 897 struct beiscsi_hba *phba; 898 899 phba = ((struct beiscsi_conn *)conn->dd_data)->phba; 900 901 if (!beiscsi_hba_is_online(phba)) { 902 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, 903 "BS_%d : HBA in error 0x%lx\n", phba->state); 904 return -EBUSY; 905 } 906 beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG, 907 "BS_%d : In beiscsi_conn_start\n"); 908 909 memset(¶ms, 0, sizeof(struct beiscsi_offload_params)); 910 beiscsi_ep = beiscsi_conn->ep; 911 if (!beiscsi_ep) 912 beiscsi_log(beiscsi_conn->phba, KERN_ERR, 913 BEISCSI_LOG_CONFIG, 914 "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n"); 915 916 beiscsi_conn->login_in_progress = 0; 917 beiscsi_set_params_for_offld(beiscsi_conn, ¶ms); 918 beiscsi_offload_connection(beiscsi_conn, ¶ms); 919 iscsi_conn_start(cls_conn); 920 return 0; 921 } 922 923 /** 924 * beiscsi_get_cid - Allocate a cid 925 * @phba: The phba instance 926 */ 927 static int beiscsi_get_cid(struct beiscsi_hba *phba) 928 { 929 uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1; 930 unsigned short cid, cid_from_ulp; 931 struct ulp_cid_info *cid_info; 932 933 /* Find the ULP which has more CID available */ 934 cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ? 935 BEISCSI_ULP0_AVLBL_CID(phba) : 0; 936 cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ? 937 BEISCSI_ULP1_AVLBL_CID(phba) : 0; 938 cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ? 939 BEISCSI_ULP0 : BEISCSI_ULP1; 940 /** 941 * If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp 942 * is ZERO for both, ULP 1 is returned. 943 * Check if ULP is loaded before getting new CID. 944 */ 945 if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported)) 946 return BE_INVALID_CID; 947 948 cid_info = phba->cid_array_info[cid_from_ulp]; 949 cid = cid_info->cid_array[cid_info->cid_alloc]; 950 if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) { 951 __beiscsi_log(phba, KERN_ERR, 952 "BS_%d : failed to get cid: available %u:%u\n", 953 cid_info->avlbl_cids, cid_info->cid_free); 954 return BE_INVALID_CID; 955 } 956 /* empty the slot */ 957 cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID; 958 if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp)) 959 cid_info->cid_alloc = 0; 960 cid_info->avlbl_cids--; 961 return cid; 962 } 963 964 /** 965 * beiscsi_put_cid - Free the cid 966 * @phba: The phba for which the cid is being freed 967 * @cid: The cid to free 968 */ 969 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) 970 { 971 uint16_t cri_index = BE_GET_CRI_FROM_CID(cid); 972 struct hwi_wrb_context *pwrb_context; 973 struct hwi_controller *phwi_ctrlr; 974 struct ulp_cid_info *cid_info; 975 uint16_t cid_post_ulp; 976 977 phwi_ctrlr = phba->phwi_ctrlr; 978 pwrb_context = &phwi_ctrlr->wrb_context[cri_index]; 979 cid_post_ulp = pwrb_context->ulp_num; 980 981 cid_info = phba->cid_array_info[cid_post_ulp]; 982 /* fill only in empty slot */ 983 if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) { 984 __beiscsi_log(phba, KERN_ERR, 985 "BS_%d : failed to put cid %u: available %u:%u\n", 986 cid, cid_info->avlbl_cids, cid_info->cid_free); 987 return; 988 } 989 cid_info->cid_array[cid_info->cid_free++] = cid; 990 if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp)) 991 cid_info->cid_free = 0; 992 cid_info->avlbl_cids++; 993 } 994 995 /** 996 * beiscsi_free_ep - free endpoint 997 * @beiscsi_ep: pointer to device endpoint struct 998 */ 999 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) 1000 { 1001 struct beiscsi_hba *phba = beiscsi_ep->phba; 1002 struct beiscsi_conn *beiscsi_conn; 1003 1004 beiscsi_put_cid(phba, beiscsi_ep->ep_cid); 1005 beiscsi_ep->phba = NULL; 1006 /* clear this to track freeing in beiscsi_ep_disconnect */ 1007 phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL; 1008 1009 /** 1010 * Check if any connection resource allocated by driver 1011 * is to be freed.This case occurs when target redirection 1012 * or connection retry is done. 1013 **/ 1014 if (!beiscsi_ep->conn) 1015 return; 1016 1017 beiscsi_conn = beiscsi_ep->conn; 1018 /** 1019 * Break ep->conn link here so that completions after 1020 * this are ignored. 1021 */ 1022 beiscsi_ep->conn = NULL; 1023 if (beiscsi_conn->login_in_progress) { 1024 beiscsi_free_mgmt_task_handles(beiscsi_conn, 1025 beiscsi_conn->task); 1026 beiscsi_conn->login_in_progress = 0; 1027 } 1028 } 1029 1030 /** 1031 * beiscsi_open_conn - Ask FW to open a TCP connection 1032 * @ep: pointer to device endpoint struct 1033 * @src_addr: The source IP address 1034 * @dst_addr: The Destination IP address 1035 * @non_blocking: blocking or non-blocking call 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 * @shost: 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 * @beiscsi_ep: pointer to device endpoint struct 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