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_ep = ep; 396 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid; 397 qedi_conn->fw_cid = qedi_ep->fw_cid; 398 qedi_conn->cmd_cleanup_req = 0; 399 qedi_conn->cmd_cleanup_cmpl = 0; 400 401 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn)) 402 return -EINVAL; 403 404 spin_lock_init(&qedi_conn->tmf_work_lock); 405 INIT_LIST_HEAD(&qedi_conn->tmf_work_list); 406 init_waitqueue_head(&qedi_conn->wait_queue); 407 return 0; 408 } 409 410 static int qedi_iscsi_update_conn(struct qedi_ctx *qedi, 411 struct qedi_conn *qedi_conn) 412 { 413 struct qed_iscsi_params_update *conn_info; 414 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn; 415 struct iscsi_conn *conn = cls_conn->dd_data; 416 struct qedi_endpoint *qedi_ep; 417 int rval; 418 419 qedi_ep = qedi_conn->ep; 420 421 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 422 if (!conn_info) { 423 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n"); 424 return -ENOMEM; 425 } 426 427 conn_info->update_flag = 0; 428 429 if (conn->hdrdgst_en) 430 SET_FIELD(conn_info->update_flag, 431 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true); 432 if (conn->datadgst_en) 433 SET_FIELD(conn_info->update_flag, 434 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true); 435 if (conn->session->initial_r2t_en) 436 SET_FIELD(conn_info->update_flag, 437 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T, 438 true); 439 if (conn->session->imm_data_en) 440 SET_FIELD(conn_info->update_flag, 441 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA, 442 true); 443 444 conn_info->max_seq_size = conn->session->max_burst; 445 conn_info->max_recv_pdu_length = conn->max_recv_dlength; 446 conn_info->max_send_pdu_length = conn->max_xmit_dlength; 447 conn_info->first_seq_length = conn->session->first_burst; 448 conn_info->exp_stat_sn = conn->exp_statsn; 449 450 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle, 451 conn_info); 452 if (rval) { 453 rval = -ENXIO; 454 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n"); 455 } 456 457 kfree(conn_info); 458 return rval; 459 } 460 461 static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en) 462 { 463 u16 mss = 0; 464 u16 hdrs = TCP_HDR_LEN; 465 466 if (is_ipv6) 467 hdrs += IPV6_HDR_LEN; 468 else 469 hdrs += IPV4_HDR_LEN; 470 471 mss = pmtu - hdrs; 472 473 if (!mss) 474 mss = DEF_MSS; 475 476 return mss; 477 } 478 479 static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep) 480 { 481 struct qedi_ctx *qedi = qedi_ep->qedi; 482 struct qed_iscsi_params_offload *conn_info; 483 int rval; 484 int i; 485 486 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 487 if (!conn_info) { 488 QEDI_ERR(&qedi->dbg_ctx, 489 "Failed to allocate memory ep=%p\n", qedi_ep); 490 return -ENOMEM; 491 } 492 493 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac); 494 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac); 495 496 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]); 497 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]); 498 499 if (qedi_ep->ip_type == TCP_IPV4) { 500 conn_info->ip_version = 0; 501 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 502 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n", 503 qedi_ep->src_addr, qedi_ep->dst_addr); 504 } else { 505 for (i = 1; i < 4; i++) { 506 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]); 507 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]); 508 } 509 510 conn_info->ip_version = 1; 511 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 512 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n", 513 qedi_ep->src_addr, qedi_ep->dst_addr); 514 } 515 516 conn_info->src.port = qedi_ep->src_port; 517 conn_info->dst.port = qedi_ep->dst_port; 518 519 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE; 520 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma; 521 conn_info->vlan_id = qedi_ep->vlan_id; 522 523 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1); 524 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1); 525 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1); 526 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1); 527 528 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues); 529 530 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT; 531 conn_info->dup_ack_theshold = 3; 532 conn_info->rcv_wnd = 65535; 533 534 conn_info->ss_thresh = 65535; 535 conn_info->srtt = 300; 536 conn_info->rtt_var = 150; 537 conn_info->flow_label = 0; 538 conn_info->ka_timeout = DEF_KA_TIMEOUT; 539 conn_info->ka_interval = DEF_KA_INTERVAL; 540 conn_info->max_rt_time = DEF_MAX_RT_TIME; 541 conn_info->ttl = DEF_TTL; 542 conn_info->tos_or_tc = DEF_TOS; 543 conn_info->remote_port = qedi_ep->dst_port; 544 conn_info->local_port = qedi_ep->src_port; 545 546 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu, 547 (qedi_ep->ip_type == TCP_IPV6), 548 1, (qedi_ep->vlan_id != 0)); 549 550 conn_info->cwnd = DEF_MAX_CWND * conn_info->mss; 551 conn_info->rcv_wnd_scale = 4; 552 conn_info->da_timeout_value = 200; 553 conn_info->ack_frequency = 2; 554 555 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 556 "Default cq index [%d], mss [%d]\n", 557 conn_info->default_cq, conn_info->mss); 558 559 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info); 560 if (rval) 561 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n", 562 rval, qedi_ep); 563 564 kfree(conn_info); 565 return rval; 566 } 567 568 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn) 569 { 570 struct iscsi_conn *conn = cls_conn->dd_data; 571 struct qedi_conn *qedi_conn = conn->dd_data; 572 struct qedi_ctx *qedi; 573 int rval; 574 575 qedi = qedi_conn->qedi; 576 577 rval = qedi_iscsi_update_conn(qedi, qedi_conn); 578 if (rval) { 579 iscsi_conn_printk(KERN_ALERT, conn, 580 "conn_start: FW offload conn failed.\n"); 581 rval = -EINVAL; 582 goto start_err; 583 } 584 585 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); 586 qedi_conn->abrt_conn = 0; 587 588 rval = iscsi_conn_start(cls_conn); 589 if (rval) { 590 iscsi_conn_printk(KERN_ALERT, conn, 591 "iscsi_conn_start: FW offload conn failed!!\n"); 592 } 593 594 start_err: 595 return rval; 596 } 597 598 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn) 599 { 600 struct iscsi_conn *conn = cls_conn->dd_data; 601 struct qedi_conn *qedi_conn = conn->dd_data; 602 struct Scsi_Host *shost; 603 struct qedi_ctx *qedi; 604 605 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 606 qedi = iscsi_host_priv(shost); 607 608 qedi_conn_free_login_resources(qedi, qedi_conn); 609 iscsi_conn_teardown(cls_conn); 610 } 611 612 static int qedi_ep_get_param(struct iscsi_endpoint *ep, 613 enum iscsi_param param, char *buf) 614 { 615 struct qedi_endpoint *qedi_ep = ep->dd_data; 616 int len; 617 618 if (!qedi_ep) 619 return -ENOTCONN; 620 621 switch (param) { 622 case ISCSI_PARAM_CONN_PORT: 623 len = sprintf(buf, "%hu\n", qedi_ep->dst_port); 624 break; 625 case ISCSI_PARAM_CONN_ADDRESS: 626 if (qedi_ep->ip_type == TCP_IPV4) 627 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr); 628 else 629 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr); 630 break; 631 default: 632 return -ENOTCONN; 633 } 634 635 return len; 636 } 637 638 static int qedi_host_get_param(struct Scsi_Host *shost, 639 enum iscsi_host_param param, char *buf) 640 { 641 struct qedi_ctx *qedi; 642 int len; 643 644 qedi = iscsi_host_priv(shost); 645 646 switch (param) { 647 case ISCSI_HOST_PARAM_HWADDRESS: 648 len = sysfs_format_mac(buf, qedi->mac, 6); 649 break; 650 case ISCSI_HOST_PARAM_NETDEV_NAME: 651 len = sprintf(buf, "host%d\n", shost->host_no); 652 break; 653 case ISCSI_HOST_PARAM_IPADDRESS: 654 if (qedi->ip_type == TCP_IPV4) 655 len = sprintf(buf, "%pI4\n", qedi->src_ip); 656 else 657 len = sprintf(buf, "%pI6\n", qedi->src_ip); 658 break; 659 default: 660 return iscsi_host_get_param(shost, param, buf); 661 } 662 663 return len; 664 } 665 666 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 667 struct iscsi_stats *stats) 668 { 669 struct iscsi_conn *conn = cls_conn->dd_data; 670 struct qed_iscsi_stats iscsi_stats; 671 struct Scsi_Host *shost; 672 struct qedi_ctx *qedi; 673 674 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 675 qedi = iscsi_host_priv(shost); 676 qedi_ops->get_stats(qedi->cdev, &iscsi_stats); 677 678 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt; 679 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt; 680 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt; 681 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt; 682 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt; 683 684 stats->txdata_octets = conn->txdata_octets; 685 stats->rxdata_octets = conn->rxdata_octets; 686 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 687 stats->dataout_pdus = conn->dataout_pdus_cnt; 688 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 689 stats->datain_pdus = conn->datain_pdus_cnt; 690 stats->r2t_pdus = conn->r2t_pdus_cnt; 691 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 692 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 693 stats->digest_err = 0; 694 stats->timeout_err = 0; 695 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 696 stats->custom[0].value = conn->eh_abort_cnt; 697 stats->custom_length = 1; 698 } 699 700 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn) 701 { 702 struct scsi_sge *bd_tbl; 703 704 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 705 706 bd_tbl->sge_addr.hi = 707 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); 708 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr; 709 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr - 710 qedi_conn->gen_pdu.req_buf; 711 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 712 bd_tbl->sge_addr.hi = 713 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); 714 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr; 715 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN; 716 } 717 718 static int qedi_iscsi_send_generic_request(struct iscsi_task *task) 719 { 720 struct qedi_cmd *cmd = task->dd_data; 721 struct qedi_conn *qedi_conn = cmd->conn; 722 char *buf; 723 int data_len; 724 int rc = 0; 725 726 qedi_iscsi_prep_generic_pdu_bd(qedi_conn); 727 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { 728 case ISCSI_OP_LOGIN: 729 qedi_send_iscsi_login(qedi_conn, task); 730 break; 731 case ISCSI_OP_NOOP_OUT: 732 data_len = qedi_conn->gen_pdu.req_buf_size; 733 buf = qedi_conn->gen_pdu.req_buf; 734 if (data_len) 735 rc = qedi_send_iscsi_nopout(qedi_conn, task, 736 buf, data_len, 1); 737 else 738 rc = qedi_send_iscsi_nopout(qedi_conn, task, 739 NULL, 0, 1); 740 break; 741 case ISCSI_OP_LOGOUT: 742 rc = qedi_send_iscsi_logout(qedi_conn, task); 743 break; 744 case ISCSI_OP_SCSI_TMFUNC: 745 rc = qedi_iscsi_abort_work(qedi_conn, task); 746 break; 747 case ISCSI_OP_TEXT: 748 rc = qedi_send_iscsi_text(qedi_conn, task); 749 break; 750 default: 751 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 752 "unsupported op 0x%x\n", task->hdr->opcode); 753 } 754 755 return rc; 756 } 757 758 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 759 { 760 struct qedi_conn *qedi_conn = conn->dd_data; 761 struct qedi_cmd *cmd = task->dd_data; 762 763 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); 764 765 qedi_conn->gen_pdu.req_buf_size = task->data_count; 766 767 if (task->data_count) { 768 memcpy(qedi_conn->gen_pdu.req_buf, task->data, 769 task->data_count); 770 qedi_conn->gen_pdu.req_wr_ptr = 771 qedi_conn->gen_pdu.req_buf + task->data_count; 772 } 773 774 cmd->conn = conn->dd_data; 775 cmd->scsi_cmd = NULL; 776 return qedi_iscsi_send_generic_request(task); 777 } 778 779 static int qedi_task_xmit(struct iscsi_task *task) 780 { 781 struct iscsi_conn *conn = task->conn; 782 struct qedi_conn *qedi_conn = conn->dd_data; 783 struct qedi_cmd *cmd = task->dd_data; 784 struct scsi_cmnd *sc = task->sc; 785 786 if (test_bit(QEDI_IN_SHUTDOWN, &qedi_conn->qedi->flags)) 787 return -ENODEV; 788 789 cmd->state = 0; 790 cmd->task = NULL; 791 cmd->use_slowpath = false; 792 cmd->conn = qedi_conn; 793 cmd->task = task; 794 cmd->io_cmd_in_list = false; 795 INIT_LIST_HEAD(&cmd->io_cmd); 796 797 if (!sc) 798 return qedi_mtask_xmit(conn, task); 799 800 cmd->scsi_cmd = sc; 801 return qedi_iscsi_send_ioreq(task); 802 } 803 804 static struct iscsi_endpoint * 805 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 806 int non_blocking) 807 { 808 struct qedi_ctx *qedi; 809 struct iscsi_endpoint *ep; 810 struct qedi_endpoint *qedi_ep; 811 struct sockaddr_in *addr; 812 struct sockaddr_in6 *addr6; 813 struct iscsi_path path_req; 814 u32 msg_type = ISCSI_KEVENT_IF_DOWN; 815 u32 iscsi_cid = QEDI_CID_RESERVED; 816 u16 len = 0; 817 char *buf = NULL; 818 int ret, tmp; 819 820 if (!shost) { 821 ret = -ENXIO; 822 QEDI_ERR(NULL, "shost is NULL\n"); 823 return ERR_PTR(ret); 824 } 825 826 if (qedi_do_not_recover) { 827 ret = -ENOMEM; 828 return ERR_PTR(ret); 829 } 830 831 qedi = iscsi_host_priv(shost); 832 833 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) || 834 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 835 ret = -ENOMEM; 836 return ERR_PTR(ret); 837 } 838 839 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) { 840 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n"); 841 return ERR_PTR(-ENXIO); 842 } 843 844 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint)); 845 if (!ep) { 846 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n"); 847 ret = -ENOMEM; 848 return ERR_PTR(ret); 849 } 850 qedi_ep = ep->dd_data; 851 memset(qedi_ep, 0, sizeof(struct qedi_endpoint)); 852 qedi_ep->state = EP_STATE_IDLE; 853 qedi_ep->iscsi_cid = (u32)-1; 854 qedi_ep->qedi = qedi; 855 856 if (dst_addr->sa_family == AF_INET) { 857 addr = (struct sockaddr_in *)dst_addr; 858 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr, 859 sizeof(struct in_addr)); 860 qedi_ep->dst_port = ntohs(addr->sin_port); 861 qedi_ep->ip_type = TCP_IPV4; 862 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 863 "dst_addr=%pI4, dst_port=%u\n", 864 qedi_ep->dst_addr, qedi_ep->dst_port); 865 } else if (dst_addr->sa_family == AF_INET6) { 866 addr6 = (struct sockaddr_in6 *)dst_addr; 867 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr, 868 sizeof(struct in6_addr)); 869 qedi_ep->dst_port = ntohs(addr6->sin6_port); 870 qedi_ep->ip_type = TCP_IPV6; 871 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 872 "dst_addr=%pI6, dst_port=%u\n", 873 qedi_ep->dst_addr, qedi_ep->dst_port); 874 } else { 875 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n"); 876 } 877 878 ret = qedi_alloc_sq(qedi, qedi_ep); 879 if (ret) 880 goto ep_conn_exit; 881 882 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle, 883 &qedi_ep->fw_cid, &qedi_ep->p_doorbell); 884 885 if (ret) { 886 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n"); 887 ret = -ENXIO; 888 goto ep_free_sq; 889 } 890 891 iscsi_cid = qedi_ep->handle; 892 qedi_ep->iscsi_cid = iscsi_cid; 893 894 init_waitqueue_head(&qedi_ep->ofld_wait); 895 init_waitqueue_head(&qedi_ep->tcp_ofld_wait); 896 qedi_ep->state = EP_STATE_OFLDCONN_START; 897 qedi->ep_tbl[iscsi_cid] = qedi_ep; 898 899 buf = (char *)&path_req; 900 len = sizeof(path_req); 901 memset(&path_req, 0, len); 902 903 msg_type = ISCSI_KEVENT_PATH_REQ; 904 path_req.handle = (u64)qedi_ep->iscsi_cid; 905 path_req.pmtu = qedi->ll2_mtu; 906 qedi_ep->pmtu = qedi->ll2_mtu; 907 if (qedi_ep->ip_type == TCP_IPV4) { 908 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr, 909 sizeof(struct in_addr)); 910 path_req.ip_addr_len = 4; 911 } else { 912 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr, 913 sizeof(struct in6_addr)); 914 path_req.ip_addr_len = 16; 915 } 916 917 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf, 918 len); 919 if (ret) { 920 QEDI_ERR(&qedi->dbg_ctx, 921 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n", 922 iscsi_cid, ret); 923 goto ep_rel_conn; 924 } 925 926 atomic_inc(&qedi->num_offloads); 927 return ep; 928 929 ep_rel_conn: 930 qedi->ep_tbl[iscsi_cid] = NULL; 931 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 932 if (tmp) 933 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n", 934 tmp); 935 ep_free_sq: 936 qedi_free_sq(qedi, qedi_ep); 937 ep_conn_exit: 938 iscsi_destroy_endpoint(ep); 939 return ERR_PTR(ret); 940 } 941 942 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 943 { 944 struct qedi_endpoint *qedi_ep; 945 int ret = 0; 946 947 if (qedi_do_not_recover) 948 return 1; 949 950 qedi_ep = ep->dd_data; 951 if (qedi_ep->state == EP_STATE_IDLE || 952 qedi_ep->state == EP_STATE_OFLDCONN_NONE || 953 qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 954 return -1; 955 956 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL) 957 ret = 1; 958 959 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait, 960 QEDI_OFLD_WAIT_STATE(qedi_ep), 961 msecs_to_jiffies(timeout_ms)); 962 963 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 964 ret = -1; 965 966 if (ret > 0) 967 return 1; 968 else if (!ret) 969 return 0; 970 else 971 return ret; 972 } 973 974 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn) 975 { 976 struct qedi_cmd *cmd, *cmd_tmp; 977 978 spin_lock(&qedi_conn->list_lock); 979 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list, 980 io_cmd) { 981 list_del_init(&cmd->io_cmd); 982 qedi_conn->active_cmd_count--; 983 } 984 spin_unlock(&qedi_conn->list_lock); 985 } 986 987 static void qedi_ep_disconnect(struct iscsi_endpoint *ep) 988 { 989 struct qedi_endpoint *qedi_ep; 990 struct qedi_conn *qedi_conn = NULL; 991 struct qedi_ctx *qedi; 992 int ret = 0; 993 int wait_delay; 994 int abrt_conn = 0; 995 int count = 10; 996 997 wait_delay = 60 * HZ + DEF_MAX_RT_TIME; 998 qedi_ep = ep->dd_data; 999 qedi = qedi_ep->qedi; 1000 1001 if (qedi_ep->state == EP_STATE_OFLDCONN_START) 1002 goto ep_exit_recover; 1003 1004 if (qedi_ep->state != EP_STATE_OFLDCONN_NONE) 1005 flush_work(&qedi_ep->offload_work); 1006 1007 if (qedi_ep->conn) { 1008 qedi_conn = qedi_ep->conn; 1009 abrt_conn = qedi_conn->abrt_conn; 1010 1011 while (count--) { 1012 if (!test_bit(QEDI_CONN_FW_CLEANUP, 1013 &qedi_conn->flags)) { 1014 break; 1015 } 1016 msleep(1000); 1017 } 1018 1019 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 1020 if (qedi_do_not_recover) { 1021 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1022 "Do not recover cid=0x%x\n", 1023 qedi_ep->iscsi_cid); 1024 goto ep_exit_recover; 1025 } 1026 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1027 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n", 1028 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state); 1029 qedi_cleanup_active_cmd_list(qedi_conn); 1030 goto ep_release_conn; 1031 } 1032 } 1033 1034 if (qedi_do_not_recover) 1035 goto ep_exit_recover; 1036 1037 switch (qedi_ep->state) { 1038 case EP_STATE_OFLDCONN_START: 1039 case EP_STATE_OFLDCONN_NONE: 1040 goto ep_release_conn; 1041 case EP_STATE_OFLDCONN_FAILED: 1042 break; 1043 case EP_STATE_OFLDCONN_COMPL: 1044 if (unlikely(!qedi_conn)) 1045 break; 1046 1047 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1048 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n", 1049 qedi_conn->active_cmd_count, abrt_conn, 1050 qedi_ep->state, 1051 qedi_ep->iscsi_cid, 1052 qedi_ep->conn 1053 ); 1054 1055 if (!qedi_conn->active_cmd_count) 1056 abrt_conn = 0; 1057 else 1058 abrt_conn = 1; 1059 1060 if (abrt_conn) 1061 qedi_clearsq(qedi, qedi_conn, NULL); 1062 break; 1063 default: 1064 break; 1065 } 1066 1067 if (!abrt_conn) 1068 wait_delay += qedi->pf_params.iscsi_pf_params.two_msl_timer; 1069 1070 qedi_ep->state = EP_STATE_DISCONN_START; 1071 1072 if (test_bit(QEDI_IN_SHUTDOWN, &qedi->flags) || 1073 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) 1074 goto ep_release_conn; 1075 1076 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn); 1077 if (ret) { 1078 QEDI_WARN(&qedi->dbg_ctx, 1079 "destroy_conn failed returned %d\n", ret); 1080 } else { 1081 ret = wait_event_interruptible_timeout( 1082 qedi_ep->tcp_ofld_wait, 1083 (qedi_ep->state != 1084 EP_STATE_DISCONN_START), 1085 wait_delay); 1086 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) { 1087 QEDI_WARN(&qedi->dbg_ctx, 1088 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n", 1089 ret, wait_delay, qedi_ep->iscsi_cid); 1090 } 1091 } 1092 1093 ep_release_conn: 1094 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 1095 if (ret) 1096 QEDI_WARN(&qedi->dbg_ctx, 1097 "release_conn returned %d, cid=0x%x\n", 1098 ret, qedi_ep->iscsi_cid); 1099 ep_exit_recover: 1100 qedi_ep->state = EP_STATE_IDLE; 1101 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL; 1102 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL; 1103 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port); 1104 qedi_free_sq(qedi, qedi_ep); 1105 1106 if (qedi_conn) 1107 qedi_conn->ep = NULL; 1108 1109 qedi_ep->conn = NULL; 1110 qedi_ep->qedi = NULL; 1111 atomic_dec(&qedi->num_offloads); 1112 1113 iscsi_destroy_endpoint(ep); 1114 } 1115 1116 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid) 1117 { 1118 struct qed_dev *cdev = qedi->cdev; 1119 struct qedi_uio_dev *udev; 1120 struct qedi_uio_ctrl *uctrl; 1121 struct sk_buff *skb; 1122 u32 len; 1123 int rc = 0; 1124 1125 udev = qedi->udev; 1126 if (!udev) { 1127 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n"); 1128 return -EINVAL; 1129 } 1130 1131 uctrl = (struct qedi_uio_ctrl *)udev->uctrl; 1132 if (!uctrl) { 1133 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n"); 1134 return -EINVAL; 1135 } 1136 1137 len = uctrl->host_tx_pkt_len; 1138 if (!len) { 1139 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len); 1140 return -EINVAL; 1141 } 1142 1143 skb = alloc_skb(len, GFP_ATOMIC); 1144 if (!skb) { 1145 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n"); 1146 return -EINVAL; 1147 } 1148 1149 skb_put(skb, len); 1150 memcpy(skb->data, udev->tx_pkt, len); 1151 skb->ip_summed = CHECKSUM_NONE; 1152 1153 if (vlanid) 1154 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); 1155 1156 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0); 1157 if (rc) { 1158 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n", 1159 rc); 1160 kfree_skb(skb); 1161 } 1162 1163 uctrl->host_tx_pkt_len = 0; 1164 uctrl->hw_tx_cons++; 1165 1166 return rc; 1167 } 1168 1169 static void qedi_offload_work(struct work_struct *work) 1170 { 1171 struct qedi_endpoint *qedi_ep = 1172 container_of(work, struct qedi_endpoint, offload_work); 1173 struct qedi_ctx *qedi; 1174 int wait_delay = 5 * HZ; 1175 int ret; 1176 1177 qedi = qedi_ep->qedi; 1178 1179 ret = qedi_iscsi_offload_conn(qedi_ep); 1180 if (ret) { 1181 QEDI_ERR(&qedi->dbg_ctx, 1182 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n", 1183 qedi_ep->iscsi_cid, qedi_ep, ret); 1184 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1185 return; 1186 } 1187 1188 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait, 1189 (qedi_ep->state == 1190 EP_STATE_OFLDCONN_COMPL), 1191 wait_delay); 1192 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) { 1193 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1194 QEDI_ERR(&qedi->dbg_ctx, 1195 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n", 1196 qedi_ep->iscsi_cid, qedi_ep); 1197 } 1198 } 1199 1200 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data) 1201 { 1202 struct qedi_ctx *qedi; 1203 struct qedi_endpoint *qedi_ep; 1204 int ret = 0; 1205 u32 iscsi_cid; 1206 u16 port_id = 0; 1207 1208 if (!shost) { 1209 ret = -ENXIO; 1210 QEDI_ERR(NULL, "shost is NULL\n"); 1211 return ret; 1212 } 1213 1214 if (strcmp(shost->hostt->proc_name, "qedi")) { 1215 ret = -ENXIO; 1216 QEDI_ERR(NULL, "shost %s is invalid\n", 1217 shost->hostt->proc_name); 1218 return ret; 1219 } 1220 1221 qedi = iscsi_host_priv(shost); 1222 if (path_data->handle == QEDI_PATH_HANDLE) { 1223 ret = qedi_data_avail(qedi, path_data->vlan_id); 1224 goto set_path_exit; 1225 } 1226 1227 iscsi_cid = (u32)path_data->handle; 1228 if (iscsi_cid >= qedi->max_active_conns) { 1229 ret = -EINVAL; 1230 goto set_path_exit; 1231 } 1232 qedi_ep = qedi->ep_tbl[iscsi_cid]; 1233 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1234 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); 1235 if (!qedi_ep) { 1236 ret = -EINVAL; 1237 goto set_path_exit; 1238 } 1239 1240 if (!is_valid_ether_addr(&path_data->mac_addr[0])) { 1241 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n"); 1242 qedi_ep->state = EP_STATE_OFLDCONN_NONE; 1243 ret = -EIO; 1244 goto set_path_exit; 1245 } 1246 1247 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]); 1248 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]); 1249 1250 qedi_ep->vlan_id = path_data->vlan_id; 1251 if (path_data->pmtu < DEF_PATH_MTU) { 1252 qedi_ep->pmtu = qedi->ll2_mtu; 1253 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1254 "MTU cannot be %u, using default MTU %u\n", 1255 path_data->pmtu, qedi_ep->pmtu); 1256 } 1257 1258 if (path_data->pmtu != qedi->ll2_mtu) { 1259 if (path_data->pmtu > JUMBO_MTU) { 1260 ret = -EINVAL; 1261 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu); 1262 goto set_path_exit; 1263 } 1264 1265 qedi_reset_host_mtu(qedi, path_data->pmtu); 1266 qedi_ep->pmtu = qedi->ll2_mtu; 1267 } 1268 1269 port_id = qedi_ep->src_port; 1270 if (port_id >= QEDI_LOCAL_PORT_MIN && 1271 port_id < QEDI_LOCAL_PORT_MAX) { 1272 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id)) 1273 port_id = 0; 1274 } else { 1275 port_id = 0; 1276 } 1277 1278 if (!port_id) { 1279 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl); 1280 if (port_id == QEDI_LOCAL_PORT_INVALID) { 1281 QEDI_ERR(&qedi->dbg_ctx, 1282 "Failed to allocate port id for iscsi_cid=0x%x\n", 1283 iscsi_cid); 1284 ret = -ENOMEM; 1285 goto set_path_exit; 1286 } 1287 } 1288 1289 qedi_ep->src_port = port_id; 1290 1291 if (qedi_ep->ip_type == TCP_IPV4) { 1292 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr, 1293 sizeof(struct in_addr)); 1294 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr, 1295 sizeof(struct in_addr)); 1296 qedi->ip_type = TCP_IPV4; 1297 1298 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1299 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n", 1300 qedi_ep->src_addr, qedi_ep->src_port, 1301 qedi_ep->dst_addr, qedi_ep->dst_port); 1302 } else { 1303 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr, 1304 sizeof(struct in6_addr)); 1305 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr, 1306 sizeof(struct in6_addr)); 1307 qedi->ip_type = TCP_IPV6; 1308 1309 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1310 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n", 1311 qedi_ep->src_addr, qedi_ep->src_port, 1312 qedi_ep->dst_addr, qedi_ep->dst_port); 1313 } 1314 1315 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work); 1316 queue_work(qedi->offload_thread, &qedi_ep->offload_work); 1317 1318 ret = 0; 1319 1320 set_path_exit: 1321 return ret; 1322 } 1323 1324 static umode_t qedi_attr_is_visible(int param_type, int param) 1325 { 1326 switch (param_type) { 1327 case ISCSI_HOST_PARAM: 1328 switch (param) { 1329 case ISCSI_HOST_PARAM_NETDEV_NAME: 1330 case ISCSI_HOST_PARAM_HWADDRESS: 1331 case ISCSI_HOST_PARAM_IPADDRESS: 1332 return 0444; 1333 default: 1334 return 0; 1335 } 1336 case ISCSI_PARAM: 1337 switch (param) { 1338 case ISCSI_PARAM_MAX_RECV_DLENGTH: 1339 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 1340 case ISCSI_PARAM_HDRDGST_EN: 1341 case ISCSI_PARAM_DATADGST_EN: 1342 case ISCSI_PARAM_CONN_ADDRESS: 1343 case ISCSI_PARAM_CONN_PORT: 1344 case ISCSI_PARAM_EXP_STATSN: 1345 case ISCSI_PARAM_PERSISTENT_ADDRESS: 1346 case ISCSI_PARAM_PERSISTENT_PORT: 1347 case ISCSI_PARAM_PING_TMO: 1348 case ISCSI_PARAM_RECV_TMO: 1349 case ISCSI_PARAM_INITIAL_R2T_EN: 1350 case ISCSI_PARAM_MAX_R2T: 1351 case ISCSI_PARAM_IMM_DATA_EN: 1352 case ISCSI_PARAM_FIRST_BURST: 1353 case ISCSI_PARAM_MAX_BURST: 1354 case ISCSI_PARAM_PDU_INORDER_EN: 1355 case ISCSI_PARAM_DATASEQ_INORDER_EN: 1356 case ISCSI_PARAM_ERL: 1357 case ISCSI_PARAM_TARGET_NAME: 1358 case ISCSI_PARAM_TPGT: 1359 case ISCSI_PARAM_USERNAME: 1360 case ISCSI_PARAM_PASSWORD: 1361 case ISCSI_PARAM_USERNAME_IN: 1362 case ISCSI_PARAM_PASSWORD_IN: 1363 case ISCSI_PARAM_FAST_ABORT: 1364 case ISCSI_PARAM_ABORT_TMO: 1365 case ISCSI_PARAM_LU_RESET_TMO: 1366 case ISCSI_PARAM_TGT_RESET_TMO: 1367 case ISCSI_PARAM_IFACE_NAME: 1368 case ISCSI_PARAM_INITIATOR_NAME: 1369 case ISCSI_PARAM_BOOT_ROOT: 1370 case ISCSI_PARAM_BOOT_NIC: 1371 case ISCSI_PARAM_BOOT_TARGET: 1372 return 0444; 1373 default: 1374 return 0; 1375 } 1376 } 1377 1378 return 0; 1379 } 1380 1381 static void qedi_cleanup_task(struct iscsi_task *task) 1382 { 1383 if (!task->sc || task->state == ISCSI_TASK_PENDING) { 1384 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n", 1385 refcount_read(&task->refcount)); 1386 return; 1387 } 1388 1389 qedi_iscsi_unmap_sg_list(task->dd_data); 1390 } 1391 1392 struct iscsi_transport qedi_iscsi_transport = { 1393 .owner = THIS_MODULE, 1394 .name = QEDI_MODULE_NAME, 1395 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST | 1396 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO, 1397 .create_session = qedi_session_create, 1398 .destroy_session = qedi_session_destroy, 1399 .create_conn = qedi_conn_create, 1400 .bind_conn = qedi_conn_bind, 1401 .unbind_conn = iscsi_conn_unbind, 1402 .start_conn = qedi_conn_start, 1403 .stop_conn = iscsi_conn_stop, 1404 .destroy_conn = qedi_conn_destroy, 1405 .set_param = iscsi_set_param, 1406 .get_ep_param = qedi_ep_get_param, 1407 .get_conn_param = iscsi_conn_get_param, 1408 .get_session_param = iscsi_session_get_param, 1409 .get_host_param = qedi_host_get_param, 1410 .send_pdu = iscsi_conn_send_pdu, 1411 .get_stats = qedi_conn_get_stats, 1412 .xmit_task = qedi_task_xmit, 1413 .cleanup_task = qedi_cleanup_task, 1414 .session_recovery_timedout = iscsi_session_recovery_timedout, 1415 .ep_connect = qedi_ep_connect, 1416 .ep_poll = qedi_ep_poll, 1417 .ep_disconnect = qedi_ep_disconnect, 1418 .set_path = qedi_set_path, 1419 .attr_is_visible = qedi_attr_is_visible, 1420 }; 1421 1422 void qedi_start_conn_recovery(struct qedi_ctx *qedi, 1423 struct qedi_conn *qedi_conn) 1424 { 1425 struct iscsi_cls_session *cls_sess; 1426 struct iscsi_cls_conn *cls_conn; 1427 struct iscsi_conn *conn; 1428 1429 cls_conn = qedi_conn->cls_conn; 1430 conn = cls_conn->dd_data; 1431 cls_sess = iscsi_conn_to_session(cls_conn); 1432 1433 if (iscsi_is_session_online(cls_sess)) { 1434 qedi_conn->abrt_conn = 1; 1435 QEDI_ERR(&qedi->dbg_ctx, 1436 "Failing connection, state=0x%x, cid=0x%x\n", 1437 conn->session->state, qedi_conn->iscsi_conn_id); 1438 iscsi_conn_failure(qedi_conn->cls_conn->dd_data, 1439 ISCSI_ERR_CONN_FAILED); 1440 } 1441 } 1442 1443 static const struct { 1444 enum iscsi_error_types error_code; 1445 char *err_string; 1446 } qedi_iscsi_error[] = { 1447 { ISCSI_STATUS_NONE, 1448 "tcp_error none" 1449 }, 1450 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH, 1451 "task cid mismatch" 1452 }, 1453 { ISCSI_CONN_ERROR_TASK_NOT_VALID, 1454 "invalid task" 1455 }, 1456 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL, 1457 "rq ring full" 1458 }, 1459 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL, 1460 "cmdq ring full" 1461 }, 1462 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED, 1463 "sge caching failed" 1464 }, 1465 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR, 1466 "hdr digest error" 1467 }, 1468 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR, 1469 "local cmpl error" 1470 }, 1471 { ISCSI_CONN_ERROR_DATA_OVERRUN, 1472 "invalid task" 1473 }, 1474 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR, 1475 "out of sge error" 1476 }, 1477 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR, 1478 "tcp ip fragment error" 1479 }, 1480 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN, 1481 "AHS len protocol error" 1482 }, 1483 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE, 1484 "itt out of range error" 1485 }, 1486 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE, 1487 "data seg more than pdu size" 1488 }, 1489 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE, 1490 "invalid opcode" 1491 }, 1492 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE, 1493 "invalid opcode before update" 1494 }, 1495 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL, 1496 "unexpected opcode" 1497 }, 1498 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA, 1499 "r2t carries no data" 1500 }, 1501 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN, 1502 "data sn error" 1503 }, 1504 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT, 1505 "data TTT error" 1506 }, 1507 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT, 1508 "r2t TTT error" 1509 }, 1510 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET, 1511 "buffer offset error" 1512 }, 1513 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO, 1514 "buffer offset ooo" 1515 }, 1516 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN, 1517 "data seg len 0" 1518 }, 1519 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0, 1520 "data xer len error" 1521 }, 1522 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1, 1523 "data xer len1 error" 1524 }, 1525 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2, 1526 "data xer len2 error" 1527 }, 1528 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN, 1529 "protocol lun error" 1530 }, 1531 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO, 1532 "f bit zero error" 1533 }, 1534 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN, 1535 "exp stat sn error" 1536 }, 1537 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO, 1538 "dsl not zero error" 1539 }, 1540 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL, 1541 "invalid dsl" 1542 }, 1543 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG, 1544 "data seg len too big" 1545 }, 1546 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT, 1547 "outstanding r2t count error" 1548 }, 1549 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH, 1550 "sense datalen error" 1551 }, 1552 }; 1553 1554 static char *qedi_get_iscsi_error(enum iscsi_error_types err_code) 1555 { 1556 int i; 1557 char *msg = NULL; 1558 1559 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) { 1560 if (qedi_iscsi_error[i].error_code == err_code) { 1561 msg = qedi_iscsi_error[i].err_string; 1562 break; 1563 } 1564 } 1565 return msg; 1566 } 1567 1568 void qedi_process_iscsi_error(struct qedi_endpoint *ep, 1569 struct iscsi_eqe_data *data) 1570 { 1571 struct qedi_conn *qedi_conn; 1572 struct qedi_ctx *qedi; 1573 char warn_notice[] = "iscsi_warning"; 1574 char error_notice[] = "iscsi_error"; 1575 char unknown_msg[] = "Unknown error"; 1576 char *message; 1577 int need_recovery = 0; 1578 u32 err_mask = 0; 1579 char *msg; 1580 1581 if (!ep) 1582 return; 1583 1584 qedi_conn = ep->conn; 1585 if (!qedi_conn) 1586 return; 1587 1588 qedi = ep->qedi; 1589 1590 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n", 1591 data->error_code); 1592 1593 if (err_mask) { 1594 need_recovery = 0; 1595 message = warn_notice; 1596 } else { 1597 need_recovery = 1; 1598 message = error_notice; 1599 } 1600 1601 msg = qedi_get_iscsi_error(data->error_code); 1602 if (!msg) { 1603 need_recovery = 0; 1604 msg = unknown_msg; 1605 } 1606 1607 iscsi_conn_printk(KERN_ALERT, 1608 qedi_conn->cls_conn->dd_data, 1609 "qedi: %s - %s\n", message, msg); 1610 1611 if (need_recovery) 1612 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1613 } 1614 1615 void qedi_clear_session_ctx(struct iscsi_cls_session *cls_sess) 1616 { 1617 struct iscsi_session *session = cls_sess->dd_data; 1618 struct iscsi_conn *conn = session->leadconn; 1619 struct qedi_conn *qedi_conn = conn->dd_data; 1620 1621 if (iscsi_is_session_online(cls_sess)) { 1622 if (conn) 1623 iscsi_suspend_queue(conn); 1624 qedi_ep_disconnect(qedi_conn->iscsi_ep); 1625 } 1626 1627 qedi_conn_destroy(qedi_conn->cls_conn); 1628 1629 qedi_session_destroy(cls_sess); 1630 } 1631 1632 void qedi_process_tcp_error(struct qedi_endpoint *ep, 1633 struct iscsi_eqe_data *data) 1634 { 1635 struct qedi_conn *qedi_conn; 1636 1637 if (!ep) 1638 return; 1639 1640 qedi_conn = ep->conn; 1641 if (!qedi_conn) 1642 return; 1643 1644 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n", 1645 data->error_code); 1646 1647 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1648 } 1649