1 /* 2 * QLogic iSCSI Offload Driver 3 * Copyright (c) 2016 Cavium Inc. 4 * 5 * This software is available under the terms of the GNU General Public License 6 * (GPL) Version 2, available from the file COPYING in the main directory of 7 * this source tree. 8 */ 9 10 #include <linux/blkdev.h> 11 #include <linux/etherdevice.h> 12 #include <linux/if_ether.h> 13 #include <linux/if_vlan.h> 14 #include <scsi/scsi_tcq.h> 15 16 #include "qedi.h" 17 #include "qedi_iscsi.h" 18 #include "qedi_gbl.h" 19 20 int qedi_recover_all_conns(struct qedi_ctx *qedi) 21 { 22 struct qedi_conn *qedi_conn; 23 int i; 24 25 for (i = 0; i < qedi->max_active_conns; i++) { 26 qedi_conn = qedi_get_conn_from_id(qedi, i); 27 if (!qedi_conn) 28 continue; 29 30 qedi_start_conn_recovery(qedi, qedi_conn); 31 } 32 33 return SUCCESS; 34 } 35 36 static int qedi_eh_host_reset(struct scsi_cmnd *cmd) 37 { 38 struct Scsi_Host *shost = cmd->device->host; 39 struct qedi_ctx *qedi; 40 41 qedi = iscsi_host_priv(shost); 42 43 return qedi_recover_all_conns(qedi); 44 } 45 46 struct scsi_host_template qedi_host_template = { 47 .module = THIS_MODULE, 48 .name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver", 49 .proc_name = QEDI_MODULE_NAME, 50 .queuecommand = iscsi_queuecommand, 51 .eh_abort_handler = iscsi_eh_abort, 52 .eh_device_reset_handler = iscsi_eh_device_reset, 53 .eh_target_reset_handler = iscsi_eh_recover_target, 54 .eh_host_reset_handler = qedi_eh_host_reset, 55 .target_alloc = iscsi_target_alloc, 56 .change_queue_depth = scsi_change_queue_depth, 57 .can_queue = QEDI_MAX_ISCSI_TASK, 58 .this_id = -1, 59 .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD, 60 .max_sectors = 0xffff, 61 .cmd_per_lun = 128, 62 .use_clustering = ENABLE_CLUSTERING, 63 .shost_attrs = qedi_shost_attrs, 64 }; 65 66 static void qedi_conn_free_login_resources(struct qedi_ctx *qedi, 67 struct qedi_conn *qedi_conn) 68 { 69 if (qedi_conn->gen_pdu.resp_bd_tbl) { 70 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 71 qedi_conn->gen_pdu.resp_bd_tbl, 72 qedi_conn->gen_pdu.resp_bd_dma); 73 qedi_conn->gen_pdu.resp_bd_tbl = NULL; 74 } 75 76 if (qedi_conn->gen_pdu.req_bd_tbl) { 77 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 78 qedi_conn->gen_pdu.req_bd_tbl, 79 qedi_conn->gen_pdu.req_bd_dma); 80 qedi_conn->gen_pdu.req_bd_tbl = NULL; 81 } 82 83 if (qedi_conn->gen_pdu.resp_buf) { 84 dma_free_coherent(&qedi->pdev->dev, 85 ISCSI_DEF_MAX_RECV_SEG_LEN, 86 qedi_conn->gen_pdu.resp_buf, 87 qedi_conn->gen_pdu.resp_dma_addr); 88 qedi_conn->gen_pdu.resp_buf = NULL; 89 } 90 91 if (qedi_conn->gen_pdu.req_buf) { 92 dma_free_coherent(&qedi->pdev->dev, 93 ISCSI_DEF_MAX_RECV_SEG_LEN, 94 qedi_conn->gen_pdu.req_buf, 95 qedi_conn->gen_pdu.req_dma_addr); 96 qedi_conn->gen_pdu.req_buf = NULL; 97 } 98 } 99 100 static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi, 101 struct qedi_conn *qedi_conn) 102 { 103 qedi_conn->gen_pdu.req_buf = 104 dma_alloc_coherent(&qedi->pdev->dev, 105 ISCSI_DEF_MAX_RECV_SEG_LEN, 106 &qedi_conn->gen_pdu.req_dma_addr, 107 GFP_KERNEL); 108 if (!qedi_conn->gen_pdu.req_buf) 109 goto login_req_buf_failure; 110 111 qedi_conn->gen_pdu.req_buf_size = 0; 112 qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf; 113 114 qedi_conn->gen_pdu.resp_buf = 115 dma_alloc_coherent(&qedi->pdev->dev, 116 ISCSI_DEF_MAX_RECV_SEG_LEN, 117 &qedi_conn->gen_pdu.resp_dma_addr, 118 GFP_KERNEL); 119 if (!qedi_conn->gen_pdu.resp_buf) 120 goto login_resp_buf_failure; 121 122 qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; 123 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf; 124 125 qedi_conn->gen_pdu.req_bd_tbl = 126 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 127 &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL); 128 if (!qedi_conn->gen_pdu.req_bd_tbl) 129 goto login_req_bd_tbl_failure; 130 131 qedi_conn->gen_pdu.resp_bd_tbl = 132 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 133 &qedi_conn->gen_pdu.resp_bd_dma, 134 GFP_KERNEL); 135 if (!qedi_conn->gen_pdu.resp_bd_tbl) 136 goto login_resp_bd_tbl_failure; 137 138 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS, 139 "Allocation successful, cid=0x%x\n", 140 qedi_conn->iscsi_conn_id); 141 return 0; 142 143 login_resp_bd_tbl_failure: 144 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 145 qedi_conn->gen_pdu.req_bd_tbl, 146 qedi_conn->gen_pdu.req_bd_dma); 147 qedi_conn->gen_pdu.req_bd_tbl = NULL; 148 149 login_req_bd_tbl_failure: 150 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 151 qedi_conn->gen_pdu.resp_buf, 152 qedi_conn->gen_pdu.resp_dma_addr); 153 qedi_conn->gen_pdu.resp_buf = NULL; 154 login_resp_buf_failure: 155 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 156 qedi_conn->gen_pdu.req_buf, 157 qedi_conn->gen_pdu.req_dma_addr); 158 qedi_conn->gen_pdu.req_buf = NULL; 159 login_req_buf_failure: 160 iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data, 161 "login resource alloc failed!!\n"); 162 return -ENOMEM; 163 } 164 165 static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi, 166 struct iscsi_session *session) 167 { 168 int i; 169 170 for (i = 0; i < session->cmds_max; i++) { 171 struct iscsi_task *task = session->cmds[i]; 172 struct qedi_cmd *cmd = task->dd_data; 173 174 if (cmd->io_tbl.sge_tbl) 175 dma_free_coherent(&qedi->pdev->dev, 176 QEDI_ISCSI_MAX_BDS_PER_CMD * 177 sizeof(struct iscsi_sge), 178 cmd->io_tbl.sge_tbl, 179 cmd->io_tbl.sge_tbl_dma); 180 181 if (cmd->sense_buffer) 182 dma_free_coherent(&qedi->pdev->dev, 183 SCSI_SENSE_BUFFERSIZE, 184 cmd->sense_buffer, 185 cmd->sense_buffer_dma); 186 } 187 } 188 189 static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session, 190 struct qedi_cmd *cmd) 191 { 192 struct qedi_io_bdt *io = &cmd->io_tbl; 193 struct iscsi_sge *sge; 194 195 io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev, 196 QEDI_ISCSI_MAX_BDS_PER_CMD * 197 sizeof(*sge), 198 &io->sge_tbl_dma, GFP_KERNEL); 199 if (!io->sge_tbl) { 200 iscsi_session_printk(KERN_ERR, session, 201 "Could not allocate BD table.\n"); 202 return -ENOMEM; 203 } 204 205 io->sge_valid = 0; 206 return 0; 207 } 208 209 static int qedi_setup_cmd_pool(struct qedi_ctx *qedi, 210 struct iscsi_session *session) 211 { 212 int i; 213 214 for (i = 0; i < session->cmds_max; i++) { 215 struct iscsi_task *task = session->cmds[i]; 216 struct qedi_cmd *cmd = task->dd_data; 217 218 task->hdr = &cmd->hdr; 219 task->hdr_max = sizeof(struct iscsi_hdr); 220 221 if (qedi_alloc_sget(qedi, session, cmd)) 222 goto free_sgets; 223 224 cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev, 225 SCSI_SENSE_BUFFERSIZE, 226 &cmd->sense_buffer_dma, 227 GFP_KERNEL); 228 if (!cmd->sense_buffer) 229 goto free_sgets; 230 } 231 232 return 0; 233 234 free_sgets: 235 qedi_destroy_cmd_pool(qedi, session); 236 return -ENOMEM; 237 } 238 239 static struct iscsi_cls_session * 240 qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max, 241 u16 qdepth, uint32_t initial_cmdsn) 242 { 243 struct Scsi_Host *shost; 244 struct iscsi_cls_session *cls_session; 245 struct qedi_ctx *qedi; 246 struct qedi_endpoint *qedi_ep; 247 248 if (!ep) 249 return NULL; 250 251 qedi_ep = ep->dd_data; 252 shost = qedi_ep->qedi->shost; 253 qedi = iscsi_host_priv(shost); 254 255 if (cmds_max > qedi->max_sqes) 256 cmds_max = qedi->max_sqes; 257 else if (cmds_max < QEDI_SQ_WQES_MIN) 258 cmds_max = QEDI_SQ_WQES_MIN; 259 260 cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost, 261 cmds_max, 0, sizeof(struct qedi_cmd), 262 initial_cmdsn, ISCSI_MAX_TARGET); 263 if (!cls_session) { 264 QEDI_ERR(&qedi->dbg_ctx, 265 "Failed to setup session for ep=%p\n", qedi_ep); 266 return NULL; 267 } 268 269 if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) { 270 QEDI_ERR(&qedi->dbg_ctx, 271 "Failed to setup cmd pool for ep=%p\n", qedi_ep); 272 goto session_teardown; 273 } 274 275 return cls_session; 276 277 session_teardown: 278 iscsi_session_teardown(cls_session); 279 return NULL; 280 } 281 282 static void qedi_session_destroy(struct iscsi_cls_session *cls_session) 283 { 284 struct iscsi_session *session = cls_session->dd_data; 285 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 286 struct qedi_ctx *qedi = iscsi_host_priv(shost); 287 288 qedi_destroy_cmd_pool(qedi, session); 289 iscsi_session_teardown(cls_session); 290 } 291 292 static struct iscsi_cls_conn * 293 qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) 294 { 295 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 296 struct qedi_ctx *qedi = iscsi_host_priv(shost); 297 struct iscsi_cls_conn *cls_conn; 298 struct qedi_conn *qedi_conn; 299 struct iscsi_conn *conn; 300 301 cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn), 302 cid); 303 if (!cls_conn) { 304 QEDI_ERR(&qedi->dbg_ctx, 305 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n", 306 cid, cls_session); 307 return NULL; 308 } 309 310 conn = cls_conn->dd_data; 311 qedi_conn = conn->dd_data; 312 qedi_conn->cls_conn = cls_conn; 313 qedi_conn->qedi = qedi; 314 qedi_conn->ep = NULL; 315 qedi_conn->active_cmd_count = 0; 316 INIT_LIST_HEAD(&qedi_conn->active_cmd_list); 317 spin_lock_init(&qedi_conn->list_lock); 318 319 if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) { 320 iscsi_conn_printk(KERN_ALERT, conn, 321 "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n", 322 cid, cls_session); 323 goto free_conn; 324 } 325 326 return cls_conn; 327 328 free_conn: 329 iscsi_conn_teardown(cls_conn); 330 return NULL; 331 } 332 333 void qedi_mark_device_missing(struct iscsi_cls_session *cls_session) 334 { 335 iscsi_block_session(cls_session); 336 } 337 338 void qedi_mark_device_available(struct iscsi_cls_session *cls_session) 339 { 340 iscsi_unblock_session(cls_session); 341 } 342 343 static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi, 344 struct qedi_conn *qedi_conn) 345 { 346 u32 iscsi_cid = qedi_conn->iscsi_conn_id; 347 348 if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) { 349 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 350 "conn bind - entry #%d not free\n", 351 iscsi_cid); 352 return -EBUSY; 353 } 354 355 qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn; 356 return 0; 357 } 358 359 struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid) 360 { 361 if (!qedi->cid_que.conn_cid_tbl) { 362 QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n"); 363 return NULL; 364 365 } else if (iscsi_cid >= qedi->max_active_conns) { 366 QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid); 367 return NULL; 368 } 369 return qedi->cid_que.conn_cid_tbl[iscsi_cid]; 370 } 371 372 static int qedi_conn_bind(struct iscsi_cls_session *cls_session, 373 struct iscsi_cls_conn *cls_conn, 374 u64 transport_fd, int is_leading) 375 { 376 struct iscsi_conn *conn = cls_conn->dd_data; 377 struct qedi_conn *qedi_conn = conn->dd_data; 378 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 379 struct qedi_ctx *qedi = iscsi_host_priv(shost); 380 struct qedi_endpoint *qedi_ep; 381 struct iscsi_endpoint *ep; 382 383 ep = iscsi_lookup_endpoint(transport_fd); 384 if (!ep) 385 return -EINVAL; 386 387 qedi_ep = ep->dd_data; 388 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) || 389 (qedi_ep->state == EP_STATE_TCP_RST_RCVD)) 390 return -EINVAL; 391 392 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) 393 return -EINVAL; 394 395 qedi_ep->conn = qedi_conn; 396 qedi_conn->ep = qedi_ep; 397 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid; 398 qedi_conn->fw_cid = qedi_ep->fw_cid; 399 qedi_conn->cmd_cleanup_req = 0; 400 qedi_conn->cmd_cleanup_cmpl = 0; 401 402 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn)) 403 return -EINVAL; 404 405 spin_lock_init(&qedi_conn->tmf_work_lock); 406 INIT_LIST_HEAD(&qedi_conn->tmf_work_list); 407 init_waitqueue_head(&qedi_conn->wait_queue); 408 return 0; 409 } 410 411 static int qedi_iscsi_update_conn(struct qedi_ctx *qedi, 412 struct qedi_conn *qedi_conn) 413 { 414 struct qed_iscsi_params_update *conn_info; 415 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn; 416 struct iscsi_conn *conn = cls_conn->dd_data; 417 struct qedi_endpoint *qedi_ep; 418 int rval; 419 420 qedi_ep = qedi_conn->ep; 421 422 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 423 if (!conn_info) { 424 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n"); 425 return -ENOMEM; 426 } 427 428 conn_info->update_flag = 0; 429 430 if (conn->hdrdgst_en) 431 SET_FIELD(conn_info->update_flag, 432 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true); 433 if (conn->datadgst_en) 434 SET_FIELD(conn_info->update_flag, 435 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true); 436 if (conn->session->initial_r2t_en) 437 SET_FIELD(conn_info->update_flag, 438 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T, 439 true); 440 if (conn->session->imm_data_en) 441 SET_FIELD(conn_info->update_flag, 442 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA, 443 true); 444 445 conn_info->max_seq_size = conn->session->max_burst; 446 conn_info->max_recv_pdu_length = conn->max_recv_dlength; 447 conn_info->max_send_pdu_length = conn->max_xmit_dlength; 448 conn_info->first_seq_length = conn->session->first_burst; 449 conn_info->exp_stat_sn = conn->exp_statsn; 450 451 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle, 452 conn_info); 453 if (rval) { 454 rval = -ENXIO; 455 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n"); 456 goto update_conn_err; 457 } 458 459 kfree(conn_info); 460 rval = 0; 461 462 update_conn_err: 463 return rval; 464 } 465 466 static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en) 467 { 468 u16 mss = 0; 469 u16 hdrs = TCP_HDR_LEN; 470 471 if (is_ipv6) 472 hdrs += IPV6_HDR_LEN; 473 else 474 hdrs += IPV4_HDR_LEN; 475 476 if (vlan_en) 477 hdrs += VLAN_LEN; 478 479 mss = pmtu - hdrs; 480 481 if (tcp_ts_en) 482 mss -= TCP_OPTION_LEN; 483 484 if (!mss) 485 mss = DEF_MSS; 486 487 return mss; 488 } 489 490 static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep) 491 { 492 struct qedi_ctx *qedi = qedi_ep->qedi; 493 struct qed_iscsi_params_offload *conn_info; 494 int rval; 495 int i; 496 497 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 498 if (!conn_info) { 499 QEDI_ERR(&qedi->dbg_ctx, 500 "Failed to allocate memory ep=%p\n", qedi_ep); 501 return -ENOMEM; 502 } 503 504 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac); 505 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac); 506 507 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]); 508 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]); 509 510 if (qedi_ep->ip_type == TCP_IPV4) { 511 conn_info->ip_version = 0; 512 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 513 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n", 514 qedi_ep->src_addr, qedi_ep->dst_addr); 515 } else { 516 for (i = 1; i < 4; i++) { 517 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]); 518 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]); 519 } 520 521 conn_info->ip_version = 1; 522 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 523 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n", 524 qedi_ep->src_addr, qedi_ep->dst_addr); 525 } 526 527 conn_info->src.port = qedi_ep->src_port; 528 conn_info->dst.port = qedi_ep->dst_port; 529 530 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE; 531 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma; 532 conn_info->vlan_id = qedi_ep->vlan_id; 533 534 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1); 535 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1); 536 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1); 537 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1); 538 539 conn_info->default_cq = (qedi_ep->fw_cid % 8); 540 541 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT; 542 conn_info->dup_ack_theshold = 3; 543 conn_info->rcv_wnd = 65535; 544 conn_info->cwnd = DEF_MAX_CWND; 545 546 conn_info->ss_thresh = 65535; 547 conn_info->srtt = 300; 548 conn_info->rtt_var = 150; 549 conn_info->flow_label = 0; 550 conn_info->ka_timeout = DEF_KA_TIMEOUT; 551 conn_info->ka_interval = DEF_KA_INTERVAL; 552 conn_info->max_rt_time = DEF_MAX_RT_TIME; 553 conn_info->ttl = DEF_TTL; 554 conn_info->tos_or_tc = DEF_TOS; 555 conn_info->remote_port = qedi_ep->dst_port; 556 conn_info->local_port = qedi_ep->src_port; 557 558 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu, 559 (qedi_ep->ip_type == TCP_IPV6), 560 1, (qedi_ep->vlan_id != 0)); 561 562 conn_info->rcv_wnd_scale = 4; 563 conn_info->ts_ticks_per_second = 1000; 564 conn_info->da_timeout_value = 200; 565 conn_info->ack_frequency = 2; 566 567 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 568 "Default cq index [%d], mss [%d]\n", 569 conn_info->default_cq, conn_info->mss); 570 571 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info); 572 if (rval) 573 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n", 574 rval, qedi_ep); 575 576 kfree(conn_info); 577 return rval; 578 } 579 580 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn) 581 { 582 struct iscsi_conn *conn = cls_conn->dd_data; 583 struct qedi_conn *qedi_conn = conn->dd_data; 584 struct qedi_ctx *qedi; 585 int rval; 586 587 qedi = qedi_conn->qedi; 588 589 rval = qedi_iscsi_update_conn(qedi, qedi_conn); 590 if (rval) { 591 iscsi_conn_printk(KERN_ALERT, conn, 592 "conn_start: FW oflload conn failed.\n"); 593 rval = -EINVAL; 594 goto start_err; 595 } 596 597 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); 598 qedi_conn->abrt_conn = 0; 599 600 rval = iscsi_conn_start(cls_conn); 601 if (rval) { 602 iscsi_conn_printk(KERN_ALERT, conn, 603 "iscsi_conn_start: FW oflload conn failed!!\n"); 604 } 605 606 start_err: 607 return rval; 608 } 609 610 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn) 611 { 612 struct iscsi_conn *conn = cls_conn->dd_data; 613 struct qedi_conn *qedi_conn = conn->dd_data; 614 struct Scsi_Host *shost; 615 struct qedi_ctx *qedi; 616 617 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 618 qedi = iscsi_host_priv(shost); 619 620 qedi_conn_free_login_resources(qedi, qedi_conn); 621 iscsi_conn_teardown(cls_conn); 622 } 623 624 static int qedi_ep_get_param(struct iscsi_endpoint *ep, 625 enum iscsi_param param, char *buf) 626 { 627 struct qedi_endpoint *qedi_ep = ep->dd_data; 628 int len; 629 630 if (!qedi_ep) 631 return -ENOTCONN; 632 633 switch (param) { 634 case ISCSI_PARAM_CONN_PORT: 635 len = sprintf(buf, "%hu\n", qedi_ep->dst_port); 636 break; 637 case ISCSI_PARAM_CONN_ADDRESS: 638 if (qedi_ep->ip_type == TCP_IPV4) 639 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr); 640 else 641 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr); 642 break; 643 default: 644 return -ENOTCONN; 645 } 646 647 return len; 648 } 649 650 static int qedi_host_get_param(struct Scsi_Host *shost, 651 enum iscsi_host_param param, char *buf) 652 { 653 struct qedi_ctx *qedi; 654 int len; 655 656 qedi = iscsi_host_priv(shost); 657 658 switch (param) { 659 case ISCSI_HOST_PARAM_HWADDRESS: 660 len = sysfs_format_mac(buf, qedi->mac, 6); 661 break; 662 case ISCSI_HOST_PARAM_NETDEV_NAME: 663 len = sprintf(buf, "host%d\n", shost->host_no); 664 break; 665 case ISCSI_HOST_PARAM_IPADDRESS: 666 if (qedi->ip_type == TCP_IPV4) 667 len = sprintf(buf, "%pI4\n", qedi->src_ip); 668 else 669 len = sprintf(buf, "%pI6\n", qedi->src_ip); 670 break; 671 default: 672 return iscsi_host_get_param(shost, param, buf); 673 } 674 675 return len; 676 } 677 678 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 679 struct iscsi_stats *stats) 680 { 681 struct iscsi_conn *conn = cls_conn->dd_data; 682 struct qed_iscsi_stats iscsi_stats; 683 struct Scsi_Host *shost; 684 struct qedi_ctx *qedi; 685 686 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 687 qedi = iscsi_host_priv(shost); 688 qedi_ops->get_stats(qedi->cdev, &iscsi_stats); 689 690 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt; 691 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt; 692 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt; 693 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt; 694 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt; 695 696 stats->txdata_octets = conn->txdata_octets; 697 stats->rxdata_octets = conn->rxdata_octets; 698 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 699 stats->dataout_pdus = conn->dataout_pdus_cnt; 700 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 701 stats->datain_pdus = conn->datain_pdus_cnt; 702 stats->r2t_pdus = conn->r2t_pdus_cnt; 703 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 704 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 705 stats->digest_err = 0; 706 stats->timeout_err = 0; 707 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 708 stats->custom[0].value = conn->eh_abort_cnt; 709 stats->custom_length = 1; 710 } 711 712 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn) 713 { 714 struct iscsi_sge *bd_tbl; 715 716 bd_tbl = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 717 718 bd_tbl->sge_addr.hi = 719 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); 720 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr; 721 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr - 722 qedi_conn->gen_pdu.req_buf; 723 bd_tbl->reserved0 = 0; 724 bd_tbl = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 725 bd_tbl->sge_addr.hi = 726 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); 727 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr; 728 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN; 729 bd_tbl->reserved0 = 0; 730 } 731 732 static int qedi_iscsi_send_generic_request(struct iscsi_task *task) 733 { 734 struct qedi_cmd *cmd = task->dd_data; 735 struct qedi_conn *qedi_conn = cmd->conn; 736 char *buf; 737 int data_len; 738 int rc = 0; 739 740 qedi_iscsi_prep_generic_pdu_bd(qedi_conn); 741 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { 742 case ISCSI_OP_LOGIN: 743 qedi_send_iscsi_login(qedi_conn, task); 744 break; 745 case ISCSI_OP_NOOP_OUT: 746 data_len = qedi_conn->gen_pdu.req_buf_size; 747 buf = qedi_conn->gen_pdu.req_buf; 748 if (data_len) 749 rc = qedi_send_iscsi_nopout(qedi_conn, task, 750 buf, data_len, 1); 751 else 752 rc = qedi_send_iscsi_nopout(qedi_conn, task, 753 NULL, 0, 1); 754 break; 755 case ISCSI_OP_LOGOUT: 756 rc = qedi_send_iscsi_logout(qedi_conn, task); 757 break; 758 case ISCSI_OP_SCSI_TMFUNC: 759 rc = qedi_iscsi_abort_work(qedi_conn, task); 760 break; 761 case ISCSI_OP_TEXT: 762 rc = qedi_send_iscsi_text(qedi_conn, task); 763 break; 764 default: 765 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 766 "unsupported op 0x%x\n", task->hdr->opcode); 767 } 768 769 return rc; 770 } 771 772 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 773 { 774 struct qedi_conn *qedi_conn = conn->dd_data; 775 struct qedi_cmd *cmd = task->dd_data; 776 777 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); 778 779 qedi_conn->gen_pdu.req_buf_size = task->data_count; 780 781 if (task->data_count) { 782 memcpy(qedi_conn->gen_pdu.req_buf, task->data, 783 task->data_count); 784 qedi_conn->gen_pdu.req_wr_ptr = 785 qedi_conn->gen_pdu.req_buf + task->data_count; 786 } 787 788 cmd->conn = conn->dd_data; 789 cmd->scsi_cmd = NULL; 790 return qedi_iscsi_send_generic_request(task); 791 } 792 793 static int qedi_task_xmit(struct iscsi_task *task) 794 { 795 struct iscsi_conn *conn = task->conn; 796 struct qedi_conn *qedi_conn = conn->dd_data; 797 struct qedi_cmd *cmd = task->dd_data; 798 struct scsi_cmnd *sc = task->sc; 799 800 cmd->state = 0; 801 cmd->task = NULL; 802 cmd->use_slowpath = false; 803 cmd->conn = qedi_conn; 804 cmd->task = task; 805 cmd->io_cmd_in_list = false; 806 INIT_LIST_HEAD(&cmd->io_cmd); 807 808 if (!sc) 809 return qedi_mtask_xmit(conn, task); 810 811 cmd->scsi_cmd = sc; 812 return qedi_iscsi_send_ioreq(task); 813 } 814 815 static struct iscsi_endpoint * 816 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 817 int non_blocking) 818 { 819 struct qedi_ctx *qedi; 820 struct iscsi_endpoint *ep; 821 struct qedi_endpoint *qedi_ep; 822 struct sockaddr_in *addr; 823 struct sockaddr_in6 *addr6; 824 struct qed_dev *cdev = NULL; 825 struct qedi_uio_dev *udev = NULL; 826 struct iscsi_path path_req; 827 u32 msg_type = ISCSI_KEVENT_IF_DOWN; 828 u32 iscsi_cid = QEDI_CID_RESERVED; 829 u16 len = 0; 830 char *buf = NULL; 831 int ret; 832 833 if (!shost) { 834 ret = -ENXIO; 835 QEDI_ERR(NULL, "shost is NULL\n"); 836 return ERR_PTR(ret); 837 } 838 839 if (do_not_recover) { 840 ret = -ENOMEM; 841 return ERR_PTR(ret); 842 } 843 844 qedi = iscsi_host_priv(shost); 845 cdev = qedi->cdev; 846 udev = qedi->udev; 847 848 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) || 849 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 850 ret = -ENOMEM; 851 return ERR_PTR(ret); 852 } 853 854 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint)); 855 if (!ep) { 856 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n"); 857 ret = -ENOMEM; 858 return ERR_PTR(ret); 859 } 860 qedi_ep = ep->dd_data; 861 memset(qedi_ep, 0, sizeof(struct qedi_endpoint)); 862 qedi_ep->state = EP_STATE_IDLE; 863 qedi_ep->iscsi_cid = (u32)-1; 864 qedi_ep->qedi = qedi; 865 866 if (dst_addr->sa_family == AF_INET) { 867 addr = (struct sockaddr_in *)dst_addr; 868 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr, 869 sizeof(struct in_addr)); 870 qedi_ep->dst_port = ntohs(addr->sin_port); 871 qedi_ep->ip_type = TCP_IPV4; 872 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 873 "dst_addr=%pI4, dst_port=%u\n", 874 qedi_ep->dst_addr, qedi_ep->dst_port); 875 } else if (dst_addr->sa_family == AF_INET6) { 876 addr6 = (struct sockaddr_in6 *)dst_addr; 877 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr, 878 sizeof(struct in6_addr)); 879 qedi_ep->dst_port = ntohs(addr6->sin6_port); 880 qedi_ep->ip_type = TCP_IPV6; 881 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 882 "dst_addr=%pI6, dst_port=%u\n", 883 qedi_ep->dst_addr, qedi_ep->dst_port); 884 } else { 885 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n"); 886 } 887 888 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) { 889 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n"); 890 ret = -ENXIO; 891 goto ep_conn_exit; 892 } 893 894 ret = qedi_alloc_sq(qedi, qedi_ep); 895 if (ret) 896 goto ep_conn_exit; 897 898 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle, 899 &qedi_ep->fw_cid, &qedi_ep->p_doorbell); 900 901 if (ret) { 902 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n"); 903 ret = -ENXIO; 904 goto ep_free_sq; 905 } 906 907 iscsi_cid = qedi_ep->handle; 908 qedi_ep->iscsi_cid = iscsi_cid; 909 910 init_waitqueue_head(&qedi_ep->ofld_wait); 911 init_waitqueue_head(&qedi_ep->tcp_ofld_wait); 912 qedi_ep->state = EP_STATE_OFLDCONN_START; 913 qedi->ep_tbl[iscsi_cid] = qedi_ep; 914 915 buf = (char *)&path_req; 916 len = sizeof(path_req); 917 memset(&path_req, 0, len); 918 919 msg_type = ISCSI_KEVENT_PATH_REQ; 920 path_req.handle = (u64)qedi_ep->iscsi_cid; 921 path_req.pmtu = qedi->ll2_mtu; 922 qedi_ep->pmtu = qedi->ll2_mtu; 923 if (qedi_ep->ip_type == TCP_IPV4) { 924 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr, 925 sizeof(struct in_addr)); 926 path_req.ip_addr_len = 4; 927 } else { 928 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr, 929 sizeof(struct in6_addr)); 930 path_req.ip_addr_len = 16; 931 } 932 933 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf, 934 len); 935 if (ret) { 936 QEDI_ERR(&qedi->dbg_ctx, 937 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n", 938 iscsi_cid, ret); 939 goto ep_rel_conn; 940 } 941 942 atomic_inc(&qedi->num_offloads); 943 return ep; 944 945 ep_rel_conn: 946 qedi->ep_tbl[iscsi_cid] = NULL; 947 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 948 if (ret) 949 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n", 950 ret); 951 ep_free_sq: 952 qedi_free_sq(qedi, qedi_ep); 953 ep_conn_exit: 954 iscsi_destroy_endpoint(ep); 955 return ERR_PTR(ret); 956 } 957 958 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 959 { 960 struct qedi_endpoint *qedi_ep; 961 int ret = 0; 962 963 if (do_not_recover) 964 return 1; 965 966 qedi_ep = ep->dd_data; 967 if (qedi_ep->state == EP_STATE_IDLE || 968 qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 969 return -1; 970 971 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL) 972 ret = 1; 973 974 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait, 975 QEDI_OFLD_WAIT_STATE(qedi_ep), 976 msecs_to_jiffies(timeout_ms)); 977 978 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 979 ret = -1; 980 981 if (ret > 0) 982 return 1; 983 else if (!ret) 984 return 0; 985 else 986 return ret; 987 } 988 989 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn) 990 { 991 struct qedi_cmd *cmd, *cmd_tmp; 992 993 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list, 994 io_cmd) { 995 list_del_init(&cmd->io_cmd); 996 qedi_conn->active_cmd_count--; 997 } 998 } 999 1000 static void qedi_ep_disconnect(struct iscsi_endpoint *ep) 1001 { 1002 struct qedi_endpoint *qedi_ep; 1003 struct qedi_conn *qedi_conn = NULL; 1004 struct iscsi_conn *conn = NULL; 1005 struct qedi_ctx *qedi; 1006 int ret = 0; 1007 int wait_delay = 20 * HZ; 1008 int abrt_conn = 0; 1009 int count = 10; 1010 1011 qedi_ep = ep->dd_data; 1012 qedi = qedi_ep->qedi; 1013 1014 flush_work(&qedi_ep->offload_work); 1015 1016 if (qedi_ep->conn) { 1017 qedi_conn = qedi_ep->conn; 1018 conn = qedi_conn->cls_conn->dd_data; 1019 iscsi_suspend_queue(conn); 1020 abrt_conn = qedi_conn->abrt_conn; 1021 1022 while (count--) { 1023 if (!test_bit(QEDI_CONN_FW_CLEANUP, 1024 &qedi_conn->flags)) { 1025 break; 1026 } 1027 msleep(1000); 1028 } 1029 1030 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 1031 if (do_not_recover) { 1032 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1033 "Do not recover cid=0x%x\n", 1034 qedi_ep->iscsi_cid); 1035 goto ep_exit_recover; 1036 } 1037 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1038 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n", 1039 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state); 1040 qedi_cleanup_active_cmd_list(qedi_conn); 1041 goto ep_release_conn; 1042 } 1043 } 1044 1045 if (do_not_recover) 1046 goto ep_exit_recover; 1047 1048 switch (qedi_ep->state) { 1049 case EP_STATE_OFLDCONN_START: 1050 goto ep_release_conn; 1051 case EP_STATE_OFLDCONN_FAILED: 1052 break; 1053 case EP_STATE_OFLDCONN_COMPL: 1054 if (unlikely(!qedi_conn)) 1055 break; 1056 1057 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1058 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n", 1059 qedi_conn->active_cmd_count, abrt_conn, 1060 qedi_ep->state, 1061 qedi_ep->iscsi_cid, 1062 qedi_ep->conn 1063 ); 1064 1065 if (!qedi_conn->active_cmd_count) 1066 abrt_conn = 0; 1067 else 1068 abrt_conn = 1; 1069 1070 if (abrt_conn) 1071 qedi_clearsq(qedi, qedi_conn, NULL); 1072 break; 1073 default: 1074 break; 1075 } 1076 1077 qedi_ep->state = EP_STATE_DISCONN_START; 1078 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn); 1079 if (ret) { 1080 QEDI_WARN(&qedi->dbg_ctx, 1081 "destroy_conn failed returned %d\n", ret); 1082 } else { 1083 ret = wait_event_interruptible_timeout( 1084 qedi_ep->tcp_ofld_wait, 1085 (qedi_ep->state != 1086 EP_STATE_DISCONN_START), 1087 wait_delay); 1088 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) { 1089 QEDI_WARN(&qedi->dbg_ctx, 1090 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n", 1091 ret, wait_delay, qedi_ep->iscsi_cid); 1092 } 1093 } 1094 1095 ep_release_conn: 1096 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 1097 if (ret) 1098 QEDI_WARN(&qedi->dbg_ctx, 1099 "release_conn returned %d, cid=0x%x\n", 1100 ret, qedi_ep->iscsi_cid); 1101 ep_exit_recover: 1102 qedi_ep->state = EP_STATE_IDLE; 1103 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL; 1104 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL; 1105 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port); 1106 qedi_free_sq(qedi, qedi_ep); 1107 1108 if (qedi_conn) 1109 qedi_conn->ep = NULL; 1110 1111 qedi_ep->conn = NULL; 1112 qedi_ep->qedi = NULL; 1113 atomic_dec(&qedi->num_offloads); 1114 1115 iscsi_destroy_endpoint(ep); 1116 } 1117 1118 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid) 1119 { 1120 struct qed_dev *cdev = qedi->cdev; 1121 struct qedi_uio_dev *udev; 1122 struct qedi_uio_ctrl *uctrl; 1123 struct sk_buff *skb; 1124 u32 len; 1125 int rc = 0; 1126 1127 udev = qedi->udev; 1128 if (!udev) { 1129 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n"); 1130 return -EINVAL; 1131 } 1132 1133 uctrl = (struct qedi_uio_ctrl *)udev->uctrl; 1134 if (!uctrl) { 1135 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n"); 1136 return -EINVAL; 1137 } 1138 1139 len = uctrl->host_tx_pkt_len; 1140 if (!len) { 1141 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len); 1142 return -EINVAL; 1143 } 1144 1145 skb = alloc_skb(len, GFP_ATOMIC); 1146 if (!skb) { 1147 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n"); 1148 return -EINVAL; 1149 } 1150 1151 skb_put(skb, len); 1152 memcpy(skb->data, udev->tx_pkt, len); 1153 skb->ip_summed = CHECKSUM_NONE; 1154 1155 if (vlanid) 1156 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); 1157 1158 rc = qedi_ops->ll2->start_xmit(cdev, skb); 1159 if (rc) { 1160 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n", 1161 rc); 1162 kfree_skb(skb); 1163 } 1164 1165 uctrl->host_tx_pkt_len = 0; 1166 uctrl->hw_tx_cons++; 1167 1168 return rc; 1169 } 1170 1171 static void qedi_offload_work(struct work_struct *work) 1172 { 1173 struct qedi_endpoint *qedi_ep = 1174 container_of(work, struct qedi_endpoint, offload_work); 1175 struct qedi_ctx *qedi; 1176 int wait_delay = 20 * HZ; 1177 int ret; 1178 1179 qedi = qedi_ep->qedi; 1180 1181 ret = qedi_iscsi_offload_conn(qedi_ep); 1182 if (ret) { 1183 QEDI_ERR(&qedi->dbg_ctx, 1184 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n", 1185 qedi_ep->iscsi_cid, qedi_ep, ret); 1186 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1187 return; 1188 } 1189 1190 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait, 1191 (qedi_ep->state == 1192 EP_STATE_OFLDCONN_COMPL), 1193 wait_delay); 1194 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) { 1195 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1196 QEDI_ERR(&qedi->dbg_ctx, 1197 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n", 1198 qedi_ep->iscsi_cid, qedi_ep); 1199 } 1200 } 1201 1202 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data) 1203 { 1204 struct qedi_ctx *qedi; 1205 struct qedi_endpoint *qedi_ep; 1206 int ret = 0; 1207 u32 iscsi_cid; 1208 u16 port_id = 0; 1209 1210 if (!shost) { 1211 ret = -ENXIO; 1212 QEDI_ERR(NULL, "shost is NULL\n"); 1213 return ret; 1214 } 1215 1216 if (strcmp(shost->hostt->proc_name, "qedi")) { 1217 ret = -ENXIO; 1218 QEDI_ERR(NULL, "shost %s is invalid\n", 1219 shost->hostt->proc_name); 1220 return ret; 1221 } 1222 1223 qedi = iscsi_host_priv(shost); 1224 if (path_data->handle == QEDI_PATH_HANDLE) { 1225 ret = qedi_data_avail(qedi, path_data->vlan_id); 1226 goto set_path_exit; 1227 } 1228 1229 iscsi_cid = (u32)path_data->handle; 1230 qedi_ep = qedi->ep_tbl[iscsi_cid]; 1231 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1232 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); 1233 1234 if (!is_valid_ether_addr(&path_data->mac_addr[0])) { 1235 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n"); 1236 ret = -EIO; 1237 goto set_path_exit; 1238 } 1239 1240 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]); 1241 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]); 1242 1243 qedi_ep->vlan_id = path_data->vlan_id; 1244 if (path_data->pmtu < DEF_PATH_MTU) { 1245 qedi_ep->pmtu = qedi->ll2_mtu; 1246 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1247 "MTU cannot be %u, using default MTU %u\n", 1248 path_data->pmtu, qedi_ep->pmtu); 1249 } 1250 1251 if (path_data->pmtu != qedi->ll2_mtu) { 1252 if (path_data->pmtu > JUMBO_MTU) { 1253 ret = -EINVAL; 1254 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu); 1255 goto set_path_exit; 1256 } 1257 1258 qedi_reset_host_mtu(qedi, path_data->pmtu); 1259 qedi_ep->pmtu = qedi->ll2_mtu; 1260 } 1261 1262 port_id = qedi_ep->src_port; 1263 if (port_id >= QEDI_LOCAL_PORT_MIN && 1264 port_id < QEDI_LOCAL_PORT_MAX) { 1265 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id)) 1266 port_id = 0; 1267 } else { 1268 port_id = 0; 1269 } 1270 1271 if (!port_id) { 1272 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl); 1273 if (port_id == QEDI_LOCAL_PORT_INVALID) { 1274 QEDI_ERR(&qedi->dbg_ctx, 1275 "Failed to allocate port id for iscsi_cid=0x%x\n", 1276 iscsi_cid); 1277 ret = -ENOMEM; 1278 goto set_path_exit; 1279 } 1280 } 1281 1282 qedi_ep->src_port = port_id; 1283 1284 if (qedi_ep->ip_type == TCP_IPV4) { 1285 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr, 1286 sizeof(struct in_addr)); 1287 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr, 1288 sizeof(struct in_addr)); 1289 qedi->ip_type = TCP_IPV4; 1290 1291 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1292 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n", 1293 qedi_ep->src_addr, qedi_ep->src_port, 1294 qedi_ep->dst_addr, qedi_ep->dst_port); 1295 } else { 1296 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr, 1297 sizeof(struct in6_addr)); 1298 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr, 1299 sizeof(struct in6_addr)); 1300 qedi->ip_type = TCP_IPV6; 1301 1302 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1303 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n", 1304 qedi_ep->src_addr, qedi_ep->src_port, 1305 qedi_ep->dst_addr, qedi_ep->dst_port); 1306 } 1307 1308 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work); 1309 queue_work(qedi->offload_thread, &qedi_ep->offload_work); 1310 1311 ret = 0; 1312 1313 set_path_exit: 1314 return ret; 1315 } 1316 1317 static umode_t qedi_attr_is_visible(int param_type, int param) 1318 { 1319 switch (param_type) { 1320 case ISCSI_HOST_PARAM: 1321 switch (param) { 1322 case ISCSI_HOST_PARAM_NETDEV_NAME: 1323 case ISCSI_HOST_PARAM_HWADDRESS: 1324 case ISCSI_HOST_PARAM_IPADDRESS: 1325 return 0444; 1326 default: 1327 return 0; 1328 } 1329 case ISCSI_PARAM: 1330 switch (param) { 1331 case ISCSI_PARAM_MAX_RECV_DLENGTH: 1332 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 1333 case ISCSI_PARAM_HDRDGST_EN: 1334 case ISCSI_PARAM_DATADGST_EN: 1335 case ISCSI_PARAM_CONN_ADDRESS: 1336 case ISCSI_PARAM_CONN_PORT: 1337 case ISCSI_PARAM_EXP_STATSN: 1338 case ISCSI_PARAM_PERSISTENT_ADDRESS: 1339 case ISCSI_PARAM_PERSISTENT_PORT: 1340 case ISCSI_PARAM_PING_TMO: 1341 case ISCSI_PARAM_RECV_TMO: 1342 case ISCSI_PARAM_INITIAL_R2T_EN: 1343 case ISCSI_PARAM_MAX_R2T: 1344 case ISCSI_PARAM_IMM_DATA_EN: 1345 case ISCSI_PARAM_FIRST_BURST: 1346 case ISCSI_PARAM_MAX_BURST: 1347 case ISCSI_PARAM_PDU_INORDER_EN: 1348 case ISCSI_PARAM_DATASEQ_INORDER_EN: 1349 case ISCSI_PARAM_ERL: 1350 case ISCSI_PARAM_TARGET_NAME: 1351 case ISCSI_PARAM_TPGT: 1352 case ISCSI_PARAM_USERNAME: 1353 case ISCSI_PARAM_PASSWORD: 1354 case ISCSI_PARAM_USERNAME_IN: 1355 case ISCSI_PARAM_PASSWORD_IN: 1356 case ISCSI_PARAM_FAST_ABORT: 1357 case ISCSI_PARAM_ABORT_TMO: 1358 case ISCSI_PARAM_LU_RESET_TMO: 1359 case ISCSI_PARAM_TGT_RESET_TMO: 1360 case ISCSI_PARAM_IFACE_NAME: 1361 case ISCSI_PARAM_INITIATOR_NAME: 1362 case ISCSI_PARAM_BOOT_ROOT: 1363 case ISCSI_PARAM_BOOT_NIC: 1364 case ISCSI_PARAM_BOOT_TARGET: 1365 return 0444; 1366 default: 1367 return 0; 1368 } 1369 } 1370 1371 return 0; 1372 } 1373 1374 static void qedi_cleanup_task(struct iscsi_task *task) 1375 { 1376 if (!task->sc || task->state == ISCSI_TASK_PENDING) { 1377 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n", 1378 atomic_read(&task->refcount)); 1379 return; 1380 } 1381 1382 qedi_iscsi_unmap_sg_list(task->dd_data); 1383 } 1384 1385 struct iscsi_transport qedi_iscsi_transport = { 1386 .owner = THIS_MODULE, 1387 .name = QEDI_MODULE_NAME, 1388 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST | 1389 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO, 1390 .create_session = qedi_session_create, 1391 .destroy_session = qedi_session_destroy, 1392 .create_conn = qedi_conn_create, 1393 .bind_conn = qedi_conn_bind, 1394 .start_conn = qedi_conn_start, 1395 .stop_conn = iscsi_conn_stop, 1396 .destroy_conn = qedi_conn_destroy, 1397 .set_param = iscsi_set_param, 1398 .get_ep_param = qedi_ep_get_param, 1399 .get_conn_param = iscsi_conn_get_param, 1400 .get_session_param = iscsi_session_get_param, 1401 .get_host_param = qedi_host_get_param, 1402 .send_pdu = iscsi_conn_send_pdu, 1403 .get_stats = qedi_conn_get_stats, 1404 .xmit_task = qedi_task_xmit, 1405 .cleanup_task = qedi_cleanup_task, 1406 .session_recovery_timedout = iscsi_session_recovery_timedout, 1407 .ep_connect = qedi_ep_connect, 1408 .ep_poll = qedi_ep_poll, 1409 .ep_disconnect = qedi_ep_disconnect, 1410 .set_path = qedi_set_path, 1411 .attr_is_visible = qedi_attr_is_visible, 1412 }; 1413 1414 void qedi_start_conn_recovery(struct qedi_ctx *qedi, 1415 struct qedi_conn *qedi_conn) 1416 { 1417 struct iscsi_cls_session *cls_sess; 1418 struct iscsi_cls_conn *cls_conn; 1419 struct iscsi_conn *conn; 1420 1421 cls_conn = qedi_conn->cls_conn; 1422 conn = cls_conn->dd_data; 1423 cls_sess = iscsi_conn_to_session(cls_conn); 1424 1425 if (iscsi_is_session_online(cls_sess)) { 1426 qedi_conn->abrt_conn = 1; 1427 QEDI_ERR(&qedi->dbg_ctx, 1428 "Failing connection, state=0x%x, cid=0x%x\n", 1429 conn->session->state, qedi_conn->iscsi_conn_id); 1430 iscsi_conn_failure(qedi_conn->cls_conn->dd_data, 1431 ISCSI_ERR_CONN_FAILED); 1432 } 1433 } 1434 1435 static const struct { 1436 enum iscsi_error_types error_code; 1437 char *err_string; 1438 } qedi_iscsi_error[] = { 1439 { ISCSI_STATUS_NONE, 1440 "tcp_error none" 1441 }, 1442 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH, 1443 "task cid mismatch" 1444 }, 1445 { ISCSI_CONN_ERROR_TASK_NOT_VALID, 1446 "invalid task" 1447 }, 1448 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL, 1449 "rq ring full" 1450 }, 1451 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL, 1452 "cmdq ring full" 1453 }, 1454 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED, 1455 "sge caching failed" 1456 }, 1457 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR, 1458 "hdr digest error" 1459 }, 1460 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR, 1461 "local cmpl error" 1462 }, 1463 { ISCSI_CONN_ERROR_DATA_OVERRUN, 1464 "invalid task" 1465 }, 1466 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR, 1467 "out of sge error" 1468 }, 1469 { ISCSI_CONN_ERROR_TCP_SEG_PROC_IP_OPTIONS_ERROR, 1470 "tcp seg ip options error" 1471 }, 1472 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR, 1473 "tcp ip fragment error" 1474 }, 1475 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN, 1476 "AHS len protocol error" 1477 }, 1478 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE, 1479 "itt out of range error" 1480 }, 1481 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE, 1482 "data seg more than pdu size" 1483 }, 1484 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE, 1485 "invalid opcode" 1486 }, 1487 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE, 1488 "invalid opcode before update" 1489 }, 1490 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL, 1491 "unexpected opcode" 1492 }, 1493 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA, 1494 "r2t carries no data" 1495 }, 1496 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN, 1497 "data sn error" 1498 }, 1499 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT, 1500 "data TTT error" 1501 }, 1502 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT, 1503 "r2t TTT error" 1504 }, 1505 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET, 1506 "buffer offset error" 1507 }, 1508 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO, 1509 "buffer offset ooo" 1510 }, 1511 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN, 1512 "data seg len 0" 1513 }, 1514 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0, 1515 "data xer len error" 1516 }, 1517 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1, 1518 "data xer len1 error" 1519 }, 1520 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2, 1521 "data xer len2 error" 1522 }, 1523 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN, 1524 "protocol lun error" 1525 }, 1526 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO, 1527 "f bit zero error" 1528 }, 1529 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN, 1530 "exp stat sn error" 1531 }, 1532 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO, 1533 "dsl not zero error" 1534 }, 1535 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL, 1536 "invalid dsl" 1537 }, 1538 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG, 1539 "data seg len too big" 1540 }, 1541 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT, 1542 "outstanding r2t count error" 1543 }, 1544 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH, 1545 "sense datalen error" 1546 }, 1547 }; 1548 1549 char *qedi_get_iscsi_error(enum iscsi_error_types err_code) 1550 { 1551 int i; 1552 char *msg = NULL; 1553 1554 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) { 1555 if (qedi_iscsi_error[i].error_code == err_code) { 1556 msg = qedi_iscsi_error[i].err_string; 1557 break; 1558 } 1559 } 1560 return msg; 1561 } 1562 1563 void qedi_process_iscsi_error(struct qedi_endpoint *ep, struct async_data *data) 1564 { 1565 struct qedi_conn *qedi_conn; 1566 struct qedi_ctx *qedi; 1567 char warn_notice[] = "iscsi_warning"; 1568 char error_notice[] = "iscsi_error"; 1569 char unknown_msg[] = "Unknown error"; 1570 char *message; 1571 int need_recovery = 0; 1572 u32 err_mask = 0; 1573 char *msg; 1574 1575 if (!ep) 1576 return; 1577 1578 qedi_conn = ep->conn; 1579 if (!qedi_conn) 1580 return; 1581 1582 qedi = ep->qedi; 1583 1584 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n", 1585 data->error_code); 1586 1587 if (err_mask) { 1588 need_recovery = 0; 1589 message = warn_notice; 1590 } else { 1591 need_recovery = 1; 1592 message = error_notice; 1593 } 1594 1595 msg = qedi_get_iscsi_error(data->error_code); 1596 if (!msg) { 1597 need_recovery = 0; 1598 msg = unknown_msg; 1599 } 1600 1601 iscsi_conn_printk(KERN_ALERT, 1602 qedi_conn->cls_conn->dd_data, 1603 "qedi: %s - %s\n", message, msg); 1604 1605 if (need_recovery) 1606 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1607 } 1608 1609 void qedi_process_tcp_error(struct qedi_endpoint *ep, struct async_data *data) 1610 { 1611 struct qedi_conn *qedi_conn; 1612 1613 if (!ep) 1614 return; 1615 1616 qedi_conn = ep->conn; 1617 if (!qedi_conn) 1618 return; 1619 1620 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n", 1621 data->error_code); 1622 1623 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1624 } 1625