1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * QLogic iSCSI Offload Driver 4 * Copyright (c) 2016 Cavium Inc. 5 */ 6 7 #include <linux/blkdev.h> 8 #include <linux/etherdevice.h> 9 #include <linux/if_ether.h> 10 #include <linux/if_vlan.h> 11 #include <scsi/scsi_tcq.h> 12 13 #include "qedi.h" 14 #include "qedi_iscsi.h" 15 #include "qedi_gbl.h" 16 17 int qedi_recover_all_conns(struct qedi_ctx *qedi) 18 { 19 struct qedi_conn *qedi_conn; 20 int i; 21 22 for (i = 0; i < qedi->max_active_conns; i++) { 23 qedi_conn = qedi_get_conn_from_id(qedi, i); 24 if (!qedi_conn) 25 continue; 26 27 qedi_start_conn_recovery(qedi, qedi_conn); 28 } 29 30 return SUCCESS; 31 } 32 33 static int qedi_eh_host_reset(struct scsi_cmnd *cmd) 34 { 35 struct Scsi_Host *shost = cmd->device->host; 36 struct qedi_ctx *qedi; 37 38 qedi = iscsi_host_priv(shost); 39 40 return qedi_recover_all_conns(qedi); 41 } 42 43 struct scsi_host_template qedi_host_template = { 44 .module = THIS_MODULE, 45 .name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver", 46 .proc_name = QEDI_MODULE_NAME, 47 .queuecommand = iscsi_queuecommand, 48 .eh_timed_out = iscsi_eh_cmd_timed_out, 49 .eh_abort_handler = iscsi_eh_abort, 50 .eh_device_reset_handler = iscsi_eh_device_reset, 51 .eh_target_reset_handler = iscsi_eh_recover_target, 52 .eh_host_reset_handler = qedi_eh_host_reset, 53 .target_alloc = iscsi_target_alloc, 54 .change_queue_depth = scsi_change_queue_depth, 55 .can_queue = QEDI_MAX_ISCSI_TASK, 56 .this_id = -1, 57 .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD, 58 .max_sectors = 0xffff, 59 .dma_boundary = QEDI_HW_DMA_BOUNDARY, 60 .cmd_per_lun = 128, 61 .shost_attrs = qedi_shost_attrs, 62 }; 63 64 static void qedi_conn_free_login_resources(struct qedi_ctx *qedi, 65 struct qedi_conn *qedi_conn) 66 { 67 if (qedi_conn->gen_pdu.resp_bd_tbl) { 68 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 69 qedi_conn->gen_pdu.resp_bd_tbl, 70 qedi_conn->gen_pdu.resp_bd_dma); 71 qedi_conn->gen_pdu.resp_bd_tbl = NULL; 72 } 73 74 if (qedi_conn->gen_pdu.req_bd_tbl) { 75 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 76 qedi_conn->gen_pdu.req_bd_tbl, 77 qedi_conn->gen_pdu.req_bd_dma); 78 qedi_conn->gen_pdu.req_bd_tbl = NULL; 79 } 80 81 if (qedi_conn->gen_pdu.resp_buf) { 82 dma_free_coherent(&qedi->pdev->dev, 83 ISCSI_DEF_MAX_RECV_SEG_LEN, 84 qedi_conn->gen_pdu.resp_buf, 85 qedi_conn->gen_pdu.resp_dma_addr); 86 qedi_conn->gen_pdu.resp_buf = NULL; 87 } 88 89 if (qedi_conn->gen_pdu.req_buf) { 90 dma_free_coherent(&qedi->pdev->dev, 91 ISCSI_DEF_MAX_RECV_SEG_LEN, 92 qedi_conn->gen_pdu.req_buf, 93 qedi_conn->gen_pdu.req_dma_addr); 94 qedi_conn->gen_pdu.req_buf = NULL; 95 } 96 } 97 98 static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi, 99 struct qedi_conn *qedi_conn) 100 { 101 qedi_conn->gen_pdu.req_buf = 102 dma_alloc_coherent(&qedi->pdev->dev, 103 ISCSI_DEF_MAX_RECV_SEG_LEN, 104 &qedi_conn->gen_pdu.req_dma_addr, 105 GFP_KERNEL); 106 if (!qedi_conn->gen_pdu.req_buf) 107 goto login_req_buf_failure; 108 109 qedi_conn->gen_pdu.req_buf_size = 0; 110 qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf; 111 112 qedi_conn->gen_pdu.resp_buf = 113 dma_alloc_coherent(&qedi->pdev->dev, 114 ISCSI_DEF_MAX_RECV_SEG_LEN, 115 &qedi_conn->gen_pdu.resp_dma_addr, 116 GFP_KERNEL); 117 if (!qedi_conn->gen_pdu.resp_buf) 118 goto login_resp_buf_failure; 119 120 qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; 121 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf; 122 123 qedi_conn->gen_pdu.req_bd_tbl = 124 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 125 &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL); 126 if (!qedi_conn->gen_pdu.req_bd_tbl) 127 goto login_req_bd_tbl_failure; 128 129 qedi_conn->gen_pdu.resp_bd_tbl = 130 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 131 &qedi_conn->gen_pdu.resp_bd_dma, 132 GFP_KERNEL); 133 if (!qedi_conn->gen_pdu.resp_bd_tbl) 134 goto login_resp_bd_tbl_failure; 135 136 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS, 137 "Allocation successful, cid=0x%x\n", 138 qedi_conn->iscsi_conn_id); 139 return 0; 140 141 login_resp_bd_tbl_failure: 142 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 143 qedi_conn->gen_pdu.req_bd_tbl, 144 qedi_conn->gen_pdu.req_bd_dma); 145 qedi_conn->gen_pdu.req_bd_tbl = NULL; 146 147 login_req_bd_tbl_failure: 148 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 149 qedi_conn->gen_pdu.resp_buf, 150 qedi_conn->gen_pdu.resp_dma_addr); 151 qedi_conn->gen_pdu.resp_buf = NULL; 152 login_resp_buf_failure: 153 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 154 qedi_conn->gen_pdu.req_buf, 155 qedi_conn->gen_pdu.req_dma_addr); 156 qedi_conn->gen_pdu.req_buf = NULL; 157 login_req_buf_failure: 158 iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data, 159 "login resource alloc failed!!\n"); 160 return -ENOMEM; 161 } 162 163 static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi, 164 struct iscsi_session *session) 165 { 166 int i; 167 168 for (i = 0; i < session->cmds_max; i++) { 169 struct iscsi_task *task = session->cmds[i]; 170 struct qedi_cmd *cmd = task->dd_data; 171 172 if (cmd->io_tbl.sge_tbl) 173 dma_free_coherent(&qedi->pdev->dev, 174 QEDI_ISCSI_MAX_BDS_PER_CMD * 175 sizeof(struct scsi_sge), 176 cmd->io_tbl.sge_tbl, 177 cmd->io_tbl.sge_tbl_dma); 178 179 if (cmd->sense_buffer) 180 dma_free_coherent(&qedi->pdev->dev, 181 SCSI_SENSE_BUFFERSIZE, 182 cmd->sense_buffer, 183 cmd->sense_buffer_dma); 184 } 185 } 186 187 static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session, 188 struct qedi_cmd *cmd) 189 { 190 struct qedi_io_bdt *io = &cmd->io_tbl; 191 struct scsi_sge *sge; 192 193 io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev, 194 QEDI_ISCSI_MAX_BDS_PER_CMD * 195 sizeof(*sge), 196 &io->sge_tbl_dma, GFP_KERNEL); 197 if (!io->sge_tbl) { 198 iscsi_session_printk(KERN_ERR, session, 199 "Could not allocate BD table.\n"); 200 return -ENOMEM; 201 } 202 203 io->sge_valid = 0; 204 return 0; 205 } 206 207 static int qedi_setup_cmd_pool(struct qedi_ctx *qedi, 208 struct iscsi_session *session) 209 { 210 int i; 211 212 for (i = 0; i < session->cmds_max; i++) { 213 struct iscsi_task *task = session->cmds[i]; 214 struct qedi_cmd *cmd = task->dd_data; 215 216 task->hdr = &cmd->hdr; 217 task->hdr_max = sizeof(struct iscsi_hdr); 218 219 if (qedi_alloc_sget(qedi, session, cmd)) 220 goto free_sgets; 221 222 cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev, 223 SCSI_SENSE_BUFFERSIZE, 224 &cmd->sense_buffer_dma, 225 GFP_KERNEL); 226 if (!cmd->sense_buffer) 227 goto free_sgets; 228 } 229 230 return 0; 231 232 free_sgets: 233 qedi_destroy_cmd_pool(qedi, session); 234 return -ENOMEM; 235 } 236 237 static struct iscsi_cls_session * 238 qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max, 239 u16 qdepth, uint32_t initial_cmdsn) 240 { 241 struct Scsi_Host *shost; 242 struct iscsi_cls_session *cls_session; 243 struct qedi_ctx *qedi; 244 struct qedi_endpoint *qedi_ep; 245 246 if (!ep) 247 return NULL; 248 249 qedi_ep = ep->dd_data; 250 shost = qedi_ep->qedi->shost; 251 qedi = iscsi_host_priv(shost); 252 253 if (cmds_max > qedi->max_sqes) 254 cmds_max = qedi->max_sqes; 255 else if (cmds_max < QEDI_SQ_WQES_MIN) 256 cmds_max = QEDI_SQ_WQES_MIN; 257 258 cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost, 259 cmds_max, 0, sizeof(struct qedi_cmd), 260 initial_cmdsn, ISCSI_MAX_TARGET); 261 if (!cls_session) { 262 QEDI_ERR(&qedi->dbg_ctx, 263 "Failed to setup session for ep=%p\n", qedi_ep); 264 return NULL; 265 } 266 267 if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) { 268 QEDI_ERR(&qedi->dbg_ctx, 269 "Failed to setup cmd pool for ep=%p\n", qedi_ep); 270 goto session_teardown; 271 } 272 273 return cls_session; 274 275 session_teardown: 276 iscsi_session_teardown(cls_session); 277 return NULL; 278 } 279 280 static void qedi_session_destroy(struct iscsi_cls_session *cls_session) 281 { 282 struct iscsi_session *session = cls_session->dd_data; 283 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 284 struct qedi_ctx *qedi = iscsi_host_priv(shost); 285 286 qedi_destroy_cmd_pool(qedi, session); 287 iscsi_session_teardown(cls_session); 288 } 289 290 static struct iscsi_cls_conn * 291 qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) 292 { 293 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 294 struct qedi_ctx *qedi = iscsi_host_priv(shost); 295 struct iscsi_cls_conn *cls_conn; 296 struct qedi_conn *qedi_conn; 297 struct iscsi_conn *conn; 298 299 cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn), 300 cid); 301 if (!cls_conn) { 302 QEDI_ERR(&qedi->dbg_ctx, 303 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n", 304 cid, cls_session); 305 return NULL; 306 } 307 308 conn = cls_conn->dd_data; 309 qedi_conn = conn->dd_data; 310 qedi_conn->cls_conn = cls_conn; 311 qedi_conn->qedi = qedi; 312 qedi_conn->ep = NULL; 313 qedi_conn->active_cmd_count = 0; 314 INIT_LIST_HEAD(&qedi_conn->active_cmd_list); 315 spin_lock_init(&qedi_conn->list_lock); 316 317 if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) { 318 iscsi_conn_printk(KERN_ALERT, conn, 319 "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n", 320 cid, cls_session); 321 goto free_conn; 322 } 323 324 return cls_conn; 325 326 free_conn: 327 iscsi_conn_teardown(cls_conn); 328 return NULL; 329 } 330 331 void qedi_mark_device_missing(struct iscsi_cls_session *cls_session) 332 { 333 iscsi_block_session(cls_session); 334 } 335 336 void qedi_mark_device_available(struct iscsi_cls_session *cls_session) 337 { 338 iscsi_unblock_session(cls_session); 339 } 340 341 static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi, 342 struct qedi_conn *qedi_conn) 343 { 344 u32 iscsi_cid = qedi_conn->iscsi_conn_id; 345 346 if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) { 347 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 348 "conn bind - entry #%d not free\n", 349 iscsi_cid); 350 return -EBUSY; 351 } 352 353 qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn; 354 return 0; 355 } 356 357 struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid) 358 { 359 if (!qedi->cid_que.conn_cid_tbl) { 360 QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n"); 361 return NULL; 362 363 } else if (iscsi_cid >= qedi->max_active_conns) { 364 QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid); 365 return NULL; 366 } 367 return qedi->cid_que.conn_cid_tbl[iscsi_cid]; 368 } 369 370 static int qedi_conn_bind(struct iscsi_cls_session *cls_session, 371 struct iscsi_cls_conn *cls_conn, 372 u64 transport_fd, int is_leading) 373 { 374 struct iscsi_conn *conn = cls_conn->dd_data; 375 struct qedi_conn *qedi_conn = conn->dd_data; 376 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 377 struct qedi_ctx *qedi = iscsi_host_priv(shost); 378 struct qedi_endpoint *qedi_ep; 379 struct iscsi_endpoint *ep; 380 381 ep = iscsi_lookup_endpoint(transport_fd); 382 if (!ep) 383 return -EINVAL; 384 385 qedi_ep = ep->dd_data; 386 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) || 387 (qedi_ep->state == EP_STATE_TCP_RST_RCVD)) 388 return -EINVAL; 389 390 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) 391 return -EINVAL; 392 393 qedi_ep->conn = qedi_conn; 394 qedi_conn->ep = qedi_ep; 395 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid; 396 qedi_conn->fw_cid = qedi_ep->fw_cid; 397 qedi_conn->cmd_cleanup_req = 0; 398 qedi_conn->cmd_cleanup_cmpl = 0; 399 400 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn)) 401 return -EINVAL; 402 403 spin_lock_init(&qedi_conn->tmf_work_lock); 404 INIT_LIST_HEAD(&qedi_conn->tmf_work_list); 405 init_waitqueue_head(&qedi_conn->wait_queue); 406 return 0; 407 } 408 409 static int qedi_iscsi_update_conn(struct qedi_ctx *qedi, 410 struct qedi_conn *qedi_conn) 411 { 412 struct qed_iscsi_params_update *conn_info; 413 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn; 414 struct iscsi_conn *conn = cls_conn->dd_data; 415 struct qedi_endpoint *qedi_ep; 416 int rval; 417 418 qedi_ep = qedi_conn->ep; 419 420 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 421 if (!conn_info) { 422 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n"); 423 return -ENOMEM; 424 } 425 426 conn_info->update_flag = 0; 427 428 if (conn->hdrdgst_en) 429 SET_FIELD(conn_info->update_flag, 430 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true); 431 if (conn->datadgst_en) 432 SET_FIELD(conn_info->update_flag, 433 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true); 434 if (conn->session->initial_r2t_en) 435 SET_FIELD(conn_info->update_flag, 436 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T, 437 true); 438 if (conn->session->imm_data_en) 439 SET_FIELD(conn_info->update_flag, 440 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA, 441 true); 442 443 conn_info->max_seq_size = conn->session->max_burst; 444 conn_info->max_recv_pdu_length = conn->max_recv_dlength; 445 conn_info->max_send_pdu_length = conn->max_xmit_dlength; 446 conn_info->first_seq_length = conn->session->first_burst; 447 conn_info->exp_stat_sn = conn->exp_statsn; 448 449 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle, 450 conn_info); 451 if (rval) { 452 rval = -ENXIO; 453 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n"); 454 } 455 456 kfree(conn_info); 457 return rval; 458 } 459 460 static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en) 461 { 462 u16 mss = 0; 463 u16 hdrs = TCP_HDR_LEN; 464 465 if (is_ipv6) 466 hdrs += IPV6_HDR_LEN; 467 else 468 hdrs += IPV4_HDR_LEN; 469 470 mss = pmtu - hdrs; 471 472 if (!mss) 473 mss = DEF_MSS; 474 475 return mss; 476 } 477 478 static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep) 479 { 480 struct qedi_ctx *qedi = qedi_ep->qedi; 481 struct qed_iscsi_params_offload *conn_info; 482 int rval; 483 int i; 484 485 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 486 if (!conn_info) { 487 QEDI_ERR(&qedi->dbg_ctx, 488 "Failed to allocate memory ep=%p\n", qedi_ep); 489 return -ENOMEM; 490 } 491 492 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac); 493 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac); 494 495 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]); 496 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]); 497 498 if (qedi_ep->ip_type == TCP_IPV4) { 499 conn_info->ip_version = 0; 500 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 501 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n", 502 qedi_ep->src_addr, qedi_ep->dst_addr); 503 } else { 504 for (i = 1; i < 4; i++) { 505 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]); 506 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]); 507 } 508 509 conn_info->ip_version = 1; 510 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 511 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n", 512 qedi_ep->src_addr, qedi_ep->dst_addr); 513 } 514 515 conn_info->src.port = qedi_ep->src_port; 516 conn_info->dst.port = qedi_ep->dst_port; 517 518 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE; 519 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma; 520 conn_info->vlan_id = qedi_ep->vlan_id; 521 522 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1); 523 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1); 524 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1); 525 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1); 526 527 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues); 528 529 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT; 530 conn_info->dup_ack_theshold = 3; 531 conn_info->rcv_wnd = 65535; 532 533 conn_info->ss_thresh = 65535; 534 conn_info->srtt = 300; 535 conn_info->rtt_var = 150; 536 conn_info->flow_label = 0; 537 conn_info->ka_timeout = DEF_KA_TIMEOUT; 538 conn_info->ka_interval = DEF_KA_INTERVAL; 539 conn_info->max_rt_time = DEF_MAX_RT_TIME; 540 conn_info->ttl = DEF_TTL; 541 conn_info->tos_or_tc = DEF_TOS; 542 conn_info->remote_port = qedi_ep->dst_port; 543 conn_info->local_port = qedi_ep->src_port; 544 545 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu, 546 (qedi_ep->ip_type == TCP_IPV6), 547 1, (qedi_ep->vlan_id != 0)); 548 549 conn_info->cwnd = DEF_MAX_CWND * conn_info->mss; 550 conn_info->rcv_wnd_scale = 4; 551 conn_info->da_timeout_value = 200; 552 conn_info->ack_frequency = 2; 553 554 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 555 "Default cq index [%d], mss [%d]\n", 556 conn_info->default_cq, conn_info->mss); 557 558 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info); 559 if (rval) 560 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n", 561 rval, qedi_ep); 562 563 kfree(conn_info); 564 return rval; 565 } 566 567 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn) 568 { 569 struct iscsi_conn *conn = cls_conn->dd_data; 570 struct qedi_conn *qedi_conn = conn->dd_data; 571 struct qedi_ctx *qedi; 572 int rval; 573 574 qedi = qedi_conn->qedi; 575 576 rval = qedi_iscsi_update_conn(qedi, qedi_conn); 577 if (rval) { 578 iscsi_conn_printk(KERN_ALERT, conn, 579 "conn_start: FW offload conn failed.\n"); 580 rval = -EINVAL; 581 goto start_err; 582 } 583 584 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); 585 qedi_conn->abrt_conn = 0; 586 587 rval = iscsi_conn_start(cls_conn); 588 if (rval) { 589 iscsi_conn_printk(KERN_ALERT, conn, 590 "iscsi_conn_start: FW offload conn failed!!\n"); 591 } 592 593 start_err: 594 return rval; 595 } 596 597 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn) 598 { 599 struct iscsi_conn *conn = cls_conn->dd_data; 600 struct qedi_conn *qedi_conn = conn->dd_data; 601 struct Scsi_Host *shost; 602 struct qedi_ctx *qedi; 603 604 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 605 qedi = iscsi_host_priv(shost); 606 607 qedi_conn_free_login_resources(qedi, qedi_conn); 608 iscsi_conn_teardown(cls_conn); 609 } 610 611 static int qedi_ep_get_param(struct iscsi_endpoint *ep, 612 enum iscsi_param param, char *buf) 613 { 614 struct qedi_endpoint *qedi_ep = ep->dd_data; 615 int len; 616 617 if (!qedi_ep) 618 return -ENOTCONN; 619 620 switch (param) { 621 case ISCSI_PARAM_CONN_PORT: 622 len = sprintf(buf, "%hu\n", qedi_ep->dst_port); 623 break; 624 case ISCSI_PARAM_CONN_ADDRESS: 625 if (qedi_ep->ip_type == TCP_IPV4) 626 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr); 627 else 628 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr); 629 break; 630 default: 631 return -ENOTCONN; 632 } 633 634 return len; 635 } 636 637 static int qedi_host_get_param(struct Scsi_Host *shost, 638 enum iscsi_host_param param, char *buf) 639 { 640 struct qedi_ctx *qedi; 641 int len; 642 643 qedi = iscsi_host_priv(shost); 644 645 switch (param) { 646 case ISCSI_HOST_PARAM_HWADDRESS: 647 len = sysfs_format_mac(buf, qedi->mac, 6); 648 break; 649 case ISCSI_HOST_PARAM_NETDEV_NAME: 650 len = sprintf(buf, "host%d\n", shost->host_no); 651 break; 652 case ISCSI_HOST_PARAM_IPADDRESS: 653 if (qedi->ip_type == TCP_IPV4) 654 len = sprintf(buf, "%pI4\n", qedi->src_ip); 655 else 656 len = sprintf(buf, "%pI6\n", qedi->src_ip); 657 break; 658 default: 659 return iscsi_host_get_param(shost, param, buf); 660 } 661 662 return len; 663 } 664 665 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 666 struct iscsi_stats *stats) 667 { 668 struct iscsi_conn *conn = cls_conn->dd_data; 669 struct qed_iscsi_stats iscsi_stats; 670 struct Scsi_Host *shost; 671 struct qedi_ctx *qedi; 672 673 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 674 qedi = iscsi_host_priv(shost); 675 qedi_ops->get_stats(qedi->cdev, &iscsi_stats); 676 677 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt; 678 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt; 679 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt; 680 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt; 681 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt; 682 683 stats->txdata_octets = conn->txdata_octets; 684 stats->rxdata_octets = conn->rxdata_octets; 685 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 686 stats->dataout_pdus = conn->dataout_pdus_cnt; 687 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 688 stats->datain_pdus = conn->datain_pdus_cnt; 689 stats->r2t_pdus = conn->r2t_pdus_cnt; 690 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 691 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 692 stats->digest_err = 0; 693 stats->timeout_err = 0; 694 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 695 stats->custom[0].value = conn->eh_abort_cnt; 696 stats->custom_length = 1; 697 } 698 699 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn) 700 { 701 struct scsi_sge *bd_tbl; 702 703 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 704 705 bd_tbl->sge_addr.hi = 706 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); 707 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr; 708 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr - 709 qedi_conn->gen_pdu.req_buf; 710 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 711 bd_tbl->sge_addr.hi = 712 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); 713 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr; 714 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN; 715 } 716 717 static int qedi_iscsi_send_generic_request(struct iscsi_task *task) 718 { 719 struct qedi_cmd *cmd = task->dd_data; 720 struct qedi_conn *qedi_conn = cmd->conn; 721 char *buf; 722 int data_len; 723 int rc = 0; 724 725 qedi_iscsi_prep_generic_pdu_bd(qedi_conn); 726 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { 727 case ISCSI_OP_LOGIN: 728 qedi_send_iscsi_login(qedi_conn, task); 729 break; 730 case ISCSI_OP_NOOP_OUT: 731 data_len = qedi_conn->gen_pdu.req_buf_size; 732 buf = qedi_conn->gen_pdu.req_buf; 733 if (data_len) 734 rc = qedi_send_iscsi_nopout(qedi_conn, task, 735 buf, data_len, 1); 736 else 737 rc = qedi_send_iscsi_nopout(qedi_conn, task, 738 NULL, 0, 1); 739 break; 740 case ISCSI_OP_LOGOUT: 741 rc = qedi_send_iscsi_logout(qedi_conn, task); 742 break; 743 case ISCSI_OP_SCSI_TMFUNC: 744 rc = qedi_iscsi_abort_work(qedi_conn, task); 745 break; 746 case ISCSI_OP_TEXT: 747 rc = qedi_send_iscsi_text(qedi_conn, task); 748 break; 749 default: 750 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 751 "unsupported op 0x%x\n", task->hdr->opcode); 752 } 753 754 return rc; 755 } 756 757 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 758 { 759 struct qedi_conn *qedi_conn = conn->dd_data; 760 struct qedi_cmd *cmd = task->dd_data; 761 762 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); 763 764 qedi_conn->gen_pdu.req_buf_size = task->data_count; 765 766 if (task->data_count) { 767 memcpy(qedi_conn->gen_pdu.req_buf, task->data, 768 task->data_count); 769 qedi_conn->gen_pdu.req_wr_ptr = 770 qedi_conn->gen_pdu.req_buf + task->data_count; 771 } 772 773 cmd->conn = conn->dd_data; 774 cmd->scsi_cmd = NULL; 775 return qedi_iscsi_send_generic_request(task); 776 } 777 778 static int qedi_task_xmit(struct iscsi_task *task) 779 { 780 struct iscsi_conn *conn = task->conn; 781 struct qedi_conn *qedi_conn = conn->dd_data; 782 struct qedi_cmd *cmd = task->dd_data; 783 struct scsi_cmnd *sc = task->sc; 784 785 cmd->state = 0; 786 cmd->task = NULL; 787 cmd->use_slowpath = false; 788 cmd->conn = qedi_conn; 789 cmd->task = task; 790 cmd->io_cmd_in_list = false; 791 INIT_LIST_HEAD(&cmd->io_cmd); 792 793 if (!sc) 794 return qedi_mtask_xmit(conn, task); 795 796 cmd->scsi_cmd = sc; 797 return qedi_iscsi_send_ioreq(task); 798 } 799 800 static struct iscsi_endpoint * 801 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 802 int non_blocking) 803 { 804 struct qedi_ctx *qedi; 805 struct iscsi_endpoint *ep; 806 struct qedi_endpoint *qedi_ep; 807 struct sockaddr_in *addr; 808 struct sockaddr_in6 *addr6; 809 struct iscsi_path path_req; 810 u32 msg_type = ISCSI_KEVENT_IF_DOWN; 811 u32 iscsi_cid = QEDI_CID_RESERVED; 812 u16 len = 0; 813 char *buf = NULL; 814 int ret, tmp; 815 816 if (!shost) { 817 ret = -ENXIO; 818 QEDI_ERR(NULL, "shost is NULL\n"); 819 return ERR_PTR(ret); 820 } 821 822 if (qedi_do_not_recover) { 823 ret = -ENOMEM; 824 return ERR_PTR(ret); 825 } 826 827 qedi = iscsi_host_priv(shost); 828 829 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) || 830 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 831 ret = -ENOMEM; 832 return ERR_PTR(ret); 833 } 834 835 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint)); 836 if (!ep) { 837 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n"); 838 ret = -ENOMEM; 839 return ERR_PTR(ret); 840 } 841 qedi_ep = ep->dd_data; 842 memset(qedi_ep, 0, sizeof(struct qedi_endpoint)); 843 qedi_ep->state = EP_STATE_IDLE; 844 qedi_ep->iscsi_cid = (u32)-1; 845 qedi_ep->qedi = qedi; 846 847 if (dst_addr->sa_family == AF_INET) { 848 addr = (struct sockaddr_in *)dst_addr; 849 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr, 850 sizeof(struct in_addr)); 851 qedi_ep->dst_port = ntohs(addr->sin_port); 852 qedi_ep->ip_type = TCP_IPV4; 853 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 854 "dst_addr=%pI4, dst_port=%u\n", 855 qedi_ep->dst_addr, qedi_ep->dst_port); 856 } else if (dst_addr->sa_family == AF_INET6) { 857 addr6 = (struct sockaddr_in6 *)dst_addr; 858 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr, 859 sizeof(struct in6_addr)); 860 qedi_ep->dst_port = ntohs(addr6->sin6_port); 861 qedi_ep->ip_type = TCP_IPV6; 862 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 863 "dst_addr=%pI6, dst_port=%u\n", 864 qedi_ep->dst_addr, qedi_ep->dst_port); 865 } else { 866 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n"); 867 } 868 869 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) { 870 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n"); 871 ret = -ENXIO; 872 goto ep_conn_exit; 873 } 874 875 ret = qedi_alloc_sq(qedi, qedi_ep); 876 if (ret) 877 goto ep_conn_exit; 878 879 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle, 880 &qedi_ep->fw_cid, &qedi_ep->p_doorbell); 881 882 if (ret) { 883 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n"); 884 ret = -ENXIO; 885 goto ep_free_sq; 886 } 887 888 iscsi_cid = qedi_ep->handle; 889 qedi_ep->iscsi_cid = iscsi_cid; 890 891 init_waitqueue_head(&qedi_ep->ofld_wait); 892 init_waitqueue_head(&qedi_ep->tcp_ofld_wait); 893 qedi_ep->state = EP_STATE_OFLDCONN_START; 894 qedi->ep_tbl[iscsi_cid] = qedi_ep; 895 896 buf = (char *)&path_req; 897 len = sizeof(path_req); 898 memset(&path_req, 0, len); 899 900 msg_type = ISCSI_KEVENT_PATH_REQ; 901 path_req.handle = (u64)qedi_ep->iscsi_cid; 902 path_req.pmtu = qedi->ll2_mtu; 903 qedi_ep->pmtu = qedi->ll2_mtu; 904 if (qedi_ep->ip_type == TCP_IPV4) { 905 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr, 906 sizeof(struct in_addr)); 907 path_req.ip_addr_len = 4; 908 } else { 909 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr, 910 sizeof(struct in6_addr)); 911 path_req.ip_addr_len = 16; 912 } 913 914 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf, 915 len); 916 if (ret) { 917 QEDI_ERR(&qedi->dbg_ctx, 918 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n", 919 iscsi_cid, ret); 920 goto ep_rel_conn; 921 } 922 923 atomic_inc(&qedi->num_offloads); 924 return ep; 925 926 ep_rel_conn: 927 qedi->ep_tbl[iscsi_cid] = NULL; 928 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 929 if (tmp) 930 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n", 931 tmp); 932 ep_free_sq: 933 qedi_free_sq(qedi, qedi_ep); 934 ep_conn_exit: 935 iscsi_destroy_endpoint(ep); 936 return ERR_PTR(ret); 937 } 938 939 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 940 { 941 struct qedi_endpoint *qedi_ep; 942 int ret = 0; 943 944 if (qedi_do_not_recover) 945 return 1; 946 947 qedi_ep = ep->dd_data; 948 if (qedi_ep->state == EP_STATE_IDLE || 949 qedi_ep->state == EP_STATE_OFLDCONN_NONE || 950 qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 951 return -1; 952 953 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL) 954 ret = 1; 955 956 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait, 957 QEDI_OFLD_WAIT_STATE(qedi_ep), 958 msecs_to_jiffies(timeout_ms)); 959 960 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 961 ret = -1; 962 963 if (ret > 0) 964 return 1; 965 else if (!ret) 966 return 0; 967 else 968 return ret; 969 } 970 971 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn) 972 { 973 struct qedi_cmd *cmd, *cmd_tmp; 974 975 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list, 976 io_cmd) { 977 list_del_init(&cmd->io_cmd); 978 qedi_conn->active_cmd_count--; 979 } 980 } 981 982 static void qedi_ep_disconnect(struct iscsi_endpoint *ep) 983 { 984 struct qedi_endpoint *qedi_ep; 985 struct qedi_conn *qedi_conn = NULL; 986 struct iscsi_conn *conn = NULL; 987 struct qedi_ctx *qedi; 988 int ret = 0; 989 int wait_delay; 990 int abrt_conn = 0; 991 int count = 10; 992 993 wait_delay = 60 * HZ + DEF_MAX_RT_TIME; 994 qedi_ep = ep->dd_data; 995 qedi = qedi_ep->qedi; 996 997 if (qedi_ep->state == EP_STATE_OFLDCONN_START) 998 goto ep_exit_recover; 999 1000 flush_work(&qedi_ep->offload_work); 1001 1002 if (qedi_ep->conn) { 1003 qedi_conn = qedi_ep->conn; 1004 conn = qedi_conn->cls_conn->dd_data; 1005 iscsi_suspend_queue(conn); 1006 abrt_conn = qedi_conn->abrt_conn; 1007 1008 while (count--) { 1009 if (!test_bit(QEDI_CONN_FW_CLEANUP, 1010 &qedi_conn->flags)) { 1011 break; 1012 } 1013 msleep(1000); 1014 } 1015 1016 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 1017 if (qedi_do_not_recover) { 1018 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1019 "Do not recover cid=0x%x\n", 1020 qedi_ep->iscsi_cid); 1021 goto ep_exit_recover; 1022 } 1023 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1024 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n", 1025 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state); 1026 qedi_cleanup_active_cmd_list(qedi_conn); 1027 goto ep_release_conn; 1028 } 1029 } 1030 1031 if (qedi_do_not_recover) 1032 goto ep_exit_recover; 1033 1034 switch (qedi_ep->state) { 1035 case EP_STATE_OFLDCONN_START: 1036 case EP_STATE_OFLDCONN_NONE: 1037 goto ep_release_conn; 1038 case EP_STATE_OFLDCONN_FAILED: 1039 break; 1040 case EP_STATE_OFLDCONN_COMPL: 1041 if (unlikely(!qedi_conn)) 1042 break; 1043 1044 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1045 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n", 1046 qedi_conn->active_cmd_count, abrt_conn, 1047 qedi_ep->state, 1048 qedi_ep->iscsi_cid, 1049 qedi_ep->conn 1050 ); 1051 1052 if (!qedi_conn->active_cmd_count) 1053 abrt_conn = 0; 1054 else 1055 abrt_conn = 1; 1056 1057 if (abrt_conn) 1058 qedi_clearsq(qedi, qedi_conn, NULL); 1059 break; 1060 default: 1061 break; 1062 } 1063 1064 qedi_ep->state = EP_STATE_DISCONN_START; 1065 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn); 1066 if (ret) { 1067 QEDI_WARN(&qedi->dbg_ctx, 1068 "destroy_conn failed returned %d\n", ret); 1069 } else { 1070 ret = wait_event_interruptible_timeout( 1071 qedi_ep->tcp_ofld_wait, 1072 (qedi_ep->state != 1073 EP_STATE_DISCONN_START), 1074 wait_delay); 1075 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) { 1076 QEDI_WARN(&qedi->dbg_ctx, 1077 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n", 1078 ret, wait_delay, qedi_ep->iscsi_cid); 1079 } 1080 } 1081 1082 ep_release_conn: 1083 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 1084 if (ret) 1085 QEDI_WARN(&qedi->dbg_ctx, 1086 "release_conn returned %d, cid=0x%x\n", 1087 ret, qedi_ep->iscsi_cid); 1088 ep_exit_recover: 1089 qedi_ep->state = EP_STATE_IDLE; 1090 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL; 1091 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL; 1092 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port); 1093 qedi_free_sq(qedi, qedi_ep); 1094 1095 if (qedi_conn) 1096 qedi_conn->ep = NULL; 1097 1098 qedi_ep->conn = NULL; 1099 qedi_ep->qedi = NULL; 1100 atomic_dec(&qedi->num_offloads); 1101 1102 iscsi_destroy_endpoint(ep); 1103 } 1104 1105 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid) 1106 { 1107 struct qed_dev *cdev = qedi->cdev; 1108 struct qedi_uio_dev *udev; 1109 struct qedi_uio_ctrl *uctrl; 1110 struct sk_buff *skb; 1111 u32 len; 1112 int rc = 0; 1113 1114 udev = qedi->udev; 1115 if (!udev) { 1116 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n"); 1117 return -EINVAL; 1118 } 1119 1120 uctrl = (struct qedi_uio_ctrl *)udev->uctrl; 1121 if (!uctrl) { 1122 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n"); 1123 return -EINVAL; 1124 } 1125 1126 len = uctrl->host_tx_pkt_len; 1127 if (!len) { 1128 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len); 1129 return -EINVAL; 1130 } 1131 1132 skb = alloc_skb(len, GFP_ATOMIC); 1133 if (!skb) { 1134 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n"); 1135 return -EINVAL; 1136 } 1137 1138 skb_put(skb, len); 1139 memcpy(skb->data, udev->tx_pkt, len); 1140 skb->ip_summed = CHECKSUM_NONE; 1141 1142 if (vlanid) 1143 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); 1144 1145 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0); 1146 if (rc) { 1147 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n", 1148 rc); 1149 kfree_skb(skb); 1150 } 1151 1152 uctrl->host_tx_pkt_len = 0; 1153 uctrl->hw_tx_cons++; 1154 1155 return rc; 1156 } 1157 1158 static void qedi_offload_work(struct work_struct *work) 1159 { 1160 struct qedi_endpoint *qedi_ep = 1161 container_of(work, struct qedi_endpoint, offload_work); 1162 struct qedi_ctx *qedi; 1163 int wait_delay = 5 * HZ; 1164 int ret; 1165 1166 qedi = qedi_ep->qedi; 1167 1168 ret = qedi_iscsi_offload_conn(qedi_ep); 1169 if (ret) { 1170 QEDI_ERR(&qedi->dbg_ctx, 1171 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n", 1172 qedi_ep->iscsi_cid, qedi_ep, ret); 1173 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1174 return; 1175 } 1176 1177 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait, 1178 (qedi_ep->state == 1179 EP_STATE_OFLDCONN_COMPL), 1180 wait_delay); 1181 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) { 1182 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1183 QEDI_ERR(&qedi->dbg_ctx, 1184 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n", 1185 qedi_ep->iscsi_cid, qedi_ep); 1186 } 1187 } 1188 1189 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data) 1190 { 1191 struct qedi_ctx *qedi; 1192 struct qedi_endpoint *qedi_ep; 1193 int ret = 0; 1194 u32 iscsi_cid; 1195 u16 port_id = 0; 1196 1197 if (!shost) { 1198 ret = -ENXIO; 1199 QEDI_ERR(NULL, "shost is NULL\n"); 1200 return ret; 1201 } 1202 1203 if (strcmp(shost->hostt->proc_name, "qedi")) { 1204 ret = -ENXIO; 1205 QEDI_ERR(NULL, "shost %s is invalid\n", 1206 shost->hostt->proc_name); 1207 return ret; 1208 } 1209 1210 qedi = iscsi_host_priv(shost); 1211 if (path_data->handle == QEDI_PATH_HANDLE) { 1212 ret = qedi_data_avail(qedi, path_data->vlan_id); 1213 goto set_path_exit; 1214 } 1215 1216 iscsi_cid = (u32)path_data->handle; 1217 qedi_ep = qedi->ep_tbl[iscsi_cid]; 1218 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1219 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); 1220 if (!qedi_ep) { 1221 ret = -EINVAL; 1222 goto set_path_exit; 1223 } 1224 1225 if (!is_valid_ether_addr(&path_data->mac_addr[0])) { 1226 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n"); 1227 qedi_ep->state = EP_STATE_OFLDCONN_NONE; 1228 ret = -EIO; 1229 goto set_path_exit; 1230 } 1231 1232 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]); 1233 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]); 1234 1235 qedi_ep->vlan_id = path_data->vlan_id; 1236 if (path_data->pmtu < DEF_PATH_MTU) { 1237 qedi_ep->pmtu = qedi->ll2_mtu; 1238 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1239 "MTU cannot be %u, using default MTU %u\n", 1240 path_data->pmtu, qedi_ep->pmtu); 1241 } 1242 1243 if (path_data->pmtu != qedi->ll2_mtu) { 1244 if (path_data->pmtu > JUMBO_MTU) { 1245 ret = -EINVAL; 1246 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu); 1247 goto set_path_exit; 1248 } 1249 1250 qedi_reset_host_mtu(qedi, path_data->pmtu); 1251 qedi_ep->pmtu = qedi->ll2_mtu; 1252 } 1253 1254 port_id = qedi_ep->src_port; 1255 if (port_id >= QEDI_LOCAL_PORT_MIN && 1256 port_id < QEDI_LOCAL_PORT_MAX) { 1257 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id)) 1258 port_id = 0; 1259 } else { 1260 port_id = 0; 1261 } 1262 1263 if (!port_id) { 1264 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl); 1265 if (port_id == QEDI_LOCAL_PORT_INVALID) { 1266 QEDI_ERR(&qedi->dbg_ctx, 1267 "Failed to allocate port id for iscsi_cid=0x%x\n", 1268 iscsi_cid); 1269 ret = -ENOMEM; 1270 goto set_path_exit; 1271 } 1272 } 1273 1274 qedi_ep->src_port = port_id; 1275 1276 if (qedi_ep->ip_type == TCP_IPV4) { 1277 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr, 1278 sizeof(struct in_addr)); 1279 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr, 1280 sizeof(struct in_addr)); 1281 qedi->ip_type = TCP_IPV4; 1282 1283 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1284 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n", 1285 qedi_ep->src_addr, qedi_ep->src_port, 1286 qedi_ep->dst_addr, qedi_ep->dst_port); 1287 } else { 1288 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr, 1289 sizeof(struct in6_addr)); 1290 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr, 1291 sizeof(struct in6_addr)); 1292 qedi->ip_type = TCP_IPV6; 1293 1294 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1295 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n", 1296 qedi_ep->src_addr, qedi_ep->src_port, 1297 qedi_ep->dst_addr, qedi_ep->dst_port); 1298 } 1299 1300 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work); 1301 queue_work(qedi->offload_thread, &qedi_ep->offload_work); 1302 1303 ret = 0; 1304 1305 set_path_exit: 1306 return ret; 1307 } 1308 1309 static umode_t qedi_attr_is_visible(int param_type, int param) 1310 { 1311 switch (param_type) { 1312 case ISCSI_HOST_PARAM: 1313 switch (param) { 1314 case ISCSI_HOST_PARAM_NETDEV_NAME: 1315 case ISCSI_HOST_PARAM_HWADDRESS: 1316 case ISCSI_HOST_PARAM_IPADDRESS: 1317 return 0444; 1318 default: 1319 return 0; 1320 } 1321 case ISCSI_PARAM: 1322 switch (param) { 1323 case ISCSI_PARAM_MAX_RECV_DLENGTH: 1324 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 1325 case ISCSI_PARAM_HDRDGST_EN: 1326 case ISCSI_PARAM_DATADGST_EN: 1327 case ISCSI_PARAM_CONN_ADDRESS: 1328 case ISCSI_PARAM_CONN_PORT: 1329 case ISCSI_PARAM_EXP_STATSN: 1330 case ISCSI_PARAM_PERSISTENT_ADDRESS: 1331 case ISCSI_PARAM_PERSISTENT_PORT: 1332 case ISCSI_PARAM_PING_TMO: 1333 case ISCSI_PARAM_RECV_TMO: 1334 case ISCSI_PARAM_INITIAL_R2T_EN: 1335 case ISCSI_PARAM_MAX_R2T: 1336 case ISCSI_PARAM_IMM_DATA_EN: 1337 case ISCSI_PARAM_FIRST_BURST: 1338 case ISCSI_PARAM_MAX_BURST: 1339 case ISCSI_PARAM_PDU_INORDER_EN: 1340 case ISCSI_PARAM_DATASEQ_INORDER_EN: 1341 case ISCSI_PARAM_ERL: 1342 case ISCSI_PARAM_TARGET_NAME: 1343 case ISCSI_PARAM_TPGT: 1344 case ISCSI_PARAM_USERNAME: 1345 case ISCSI_PARAM_PASSWORD: 1346 case ISCSI_PARAM_USERNAME_IN: 1347 case ISCSI_PARAM_PASSWORD_IN: 1348 case ISCSI_PARAM_FAST_ABORT: 1349 case ISCSI_PARAM_ABORT_TMO: 1350 case ISCSI_PARAM_LU_RESET_TMO: 1351 case ISCSI_PARAM_TGT_RESET_TMO: 1352 case ISCSI_PARAM_IFACE_NAME: 1353 case ISCSI_PARAM_INITIATOR_NAME: 1354 case ISCSI_PARAM_BOOT_ROOT: 1355 case ISCSI_PARAM_BOOT_NIC: 1356 case ISCSI_PARAM_BOOT_TARGET: 1357 return 0444; 1358 default: 1359 return 0; 1360 } 1361 } 1362 1363 return 0; 1364 } 1365 1366 static void qedi_cleanup_task(struct iscsi_task *task) 1367 { 1368 if (!task->sc || task->state == ISCSI_TASK_PENDING) { 1369 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n", 1370 refcount_read(&task->refcount)); 1371 return; 1372 } 1373 1374 qedi_iscsi_unmap_sg_list(task->dd_data); 1375 } 1376 1377 struct iscsi_transport qedi_iscsi_transport = { 1378 .owner = THIS_MODULE, 1379 .name = QEDI_MODULE_NAME, 1380 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST | 1381 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO, 1382 .create_session = qedi_session_create, 1383 .destroy_session = qedi_session_destroy, 1384 .create_conn = qedi_conn_create, 1385 .bind_conn = qedi_conn_bind, 1386 .start_conn = qedi_conn_start, 1387 .stop_conn = iscsi_conn_stop, 1388 .destroy_conn = qedi_conn_destroy, 1389 .set_param = iscsi_set_param, 1390 .get_ep_param = qedi_ep_get_param, 1391 .get_conn_param = iscsi_conn_get_param, 1392 .get_session_param = iscsi_session_get_param, 1393 .get_host_param = qedi_host_get_param, 1394 .send_pdu = iscsi_conn_send_pdu, 1395 .get_stats = qedi_conn_get_stats, 1396 .xmit_task = qedi_task_xmit, 1397 .cleanup_task = qedi_cleanup_task, 1398 .session_recovery_timedout = iscsi_session_recovery_timedout, 1399 .ep_connect = qedi_ep_connect, 1400 .ep_poll = qedi_ep_poll, 1401 .ep_disconnect = qedi_ep_disconnect, 1402 .set_path = qedi_set_path, 1403 .attr_is_visible = qedi_attr_is_visible, 1404 }; 1405 1406 void qedi_start_conn_recovery(struct qedi_ctx *qedi, 1407 struct qedi_conn *qedi_conn) 1408 { 1409 struct iscsi_cls_session *cls_sess; 1410 struct iscsi_cls_conn *cls_conn; 1411 struct iscsi_conn *conn; 1412 1413 cls_conn = qedi_conn->cls_conn; 1414 conn = cls_conn->dd_data; 1415 cls_sess = iscsi_conn_to_session(cls_conn); 1416 1417 if (iscsi_is_session_online(cls_sess)) { 1418 qedi_conn->abrt_conn = 1; 1419 QEDI_ERR(&qedi->dbg_ctx, 1420 "Failing connection, state=0x%x, cid=0x%x\n", 1421 conn->session->state, qedi_conn->iscsi_conn_id); 1422 iscsi_conn_failure(qedi_conn->cls_conn->dd_data, 1423 ISCSI_ERR_CONN_FAILED); 1424 } 1425 } 1426 1427 static const struct { 1428 enum iscsi_error_types error_code; 1429 char *err_string; 1430 } qedi_iscsi_error[] = { 1431 { ISCSI_STATUS_NONE, 1432 "tcp_error none" 1433 }, 1434 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH, 1435 "task cid mismatch" 1436 }, 1437 { ISCSI_CONN_ERROR_TASK_NOT_VALID, 1438 "invalid task" 1439 }, 1440 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL, 1441 "rq ring full" 1442 }, 1443 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL, 1444 "cmdq ring full" 1445 }, 1446 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED, 1447 "sge caching failed" 1448 }, 1449 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR, 1450 "hdr digest error" 1451 }, 1452 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR, 1453 "local cmpl error" 1454 }, 1455 { ISCSI_CONN_ERROR_DATA_OVERRUN, 1456 "invalid task" 1457 }, 1458 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR, 1459 "out of sge error" 1460 }, 1461 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR, 1462 "tcp ip fragment error" 1463 }, 1464 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN, 1465 "AHS len protocol error" 1466 }, 1467 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE, 1468 "itt out of range error" 1469 }, 1470 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE, 1471 "data seg more than pdu size" 1472 }, 1473 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE, 1474 "invalid opcode" 1475 }, 1476 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE, 1477 "invalid opcode before update" 1478 }, 1479 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL, 1480 "unexpected opcode" 1481 }, 1482 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA, 1483 "r2t carries no data" 1484 }, 1485 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN, 1486 "data sn error" 1487 }, 1488 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT, 1489 "data TTT error" 1490 }, 1491 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT, 1492 "r2t TTT error" 1493 }, 1494 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET, 1495 "buffer offset error" 1496 }, 1497 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO, 1498 "buffer offset ooo" 1499 }, 1500 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN, 1501 "data seg len 0" 1502 }, 1503 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0, 1504 "data xer len error" 1505 }, 1506 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1, 1507 "data xer len1 error" 1508 }, 1509 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2, 1510 "data xer len2 error" 1511 }, 1512 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN, 1513 "protocol lun error" 1514 }, 1515 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO, 1516 "f bit zero error" 1517 }, 1518 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN, 1519 "exp stat sn error" 1520 }, 1521 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO, 1522 "dsl not zero error" 1523 }, 1524 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL, 1525 "invalid dsl" 1526 }, 1527 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG, 1528 "data seg len too big" 1529 }, 1530 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT, 1531 "outstanding r2t count error" 1532 }, 1533 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH, 1534 "sense datalen error" 1535 }, 1536 }; 1537 1538 char *qedi_get_iscsi_error(enum iscsi_error_types err_code) 1539 { 1540 int i; 1541 char *msg = NULL; 1542 1543 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) { 1544 if (qedi_iscsi_error[i].error_code == err_code) { 1545 msg = qedi_iscsi_error[i].err_string; 1546 break; 1547 } 1548 } 1549 return msg; 1550 } 1551 1552 void qedi_process_iscsi_error(struct qedi_endpoint *ep, 1553 struct iscsi_eqe_data *data) 1554 { 1555 struct qedi_conn *qedi_conn; 1556 struct qedi_ctx *qedi; 1557 char warn_notice[] = "iscsi_warning"; 1558 char error_notice[] = "iscsi_error"; 1559 char unknown_msg[] = "Unknown error"; 1560 char *message; 1561 int need_recovery = 0; 1562 u32 err_mask = 0; 1563 char *msg; 1564 1565 if (!ep) 1566 return; 1567 1568 qedi_conn = ep->conn; 1569 if (!qedi_conn) 1570 return; 1571 1572 qedi = ep->qedi; 1573 1574 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n", 1575 data->error_code); 1576 1577 if (err_mask) { 1578 need_recovery = 0; 1579 message = warn_notice; 1580 } else { 1581 need_recovery = 1; 1582 message = error_notice; 1583 } 1584 1585 msg = qedi_get_iscsi_error(data->error_code); 1586 if (!msg) { 1587 need_recovery = 0; 1588 msg = unknown_msg; 1589 } 1590 1591 iscsi_conn_printk(KERN_ALERT, 1592 qedi_conn->cls_conn->dd_data, 1593 "qedi: %s - %s\n", message, msg); 1594 1595 if (need_recovery) 1596 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1597 } 1598 1599 void qedi_process_tcp_error(struct qedi_endpoint *ep, 1600 struct iscsi_eqe_data *data) 1601 { 1602 struct qedi_conn *qedi_conn; 1603 1604 if (!ep) 1605 return; 1606 1607 qedi_conn = ep->conn; 1608 if (!qedi_conn) 1609 return; 1610 1611 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n", 1612 data->error_code); 1613 1614 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1615 } 1616