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 const 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_groups = qedi_shost_groups, 62 .cmd_size = sizeof(struct iscsi_cmd), 63 }; 64 65 static void qedi_conn_free_login_resources(struct qedi_ctx *qedi, 66 struct qedi_conn *qedi_conn) 67 { 68 if (qedi_conn->gen_pdu.resp_bd_tbl) { 69 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 70 qedi_conn->gen_pdu.resp_bd_tbl, 71 qedi_conn->gen_pdu.resp_bd_dma); 72 qedi_conn->gen_pdu.resp_bd_tbl = NULL; 73 } 74 75 if (qedi_conn->gen_pdu.req_bd_tbl) { 76 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 77 qedi_conn->gen_pdu.req_bd_tbl, 78 qedi_conn->gen_pdu.req_bd_dma); 79 qedi_conn->gen_pdu.req_bd_tbl = NULL; 80 } 81 82 if (qedi_conn->gen_pdu.resp_buf) { 83 dma_free_coherent(&qedi->pdev->dev, 84 ISCSI_DEF_MAX_RECV_SEG_LEN, 85 qedi_conn->gen_pdu.resp_buf, 86 qedi_conn->gen_pdu.resp_dma_addr); 87 qedi_conn->gen_pdu.resp_buf = NULL; 88 } 89 90 if (qedi_conn->gen_pdu.req_buf) { 91 dma_free_coherent(&qedi->pdev->dev, 92 ISCSI_DEF_MAX_RECV_SEG_LEN, 93 qedi_conn->gen_pdu.req_buf, 94 qedi_conn->gen_pdu.req_dma_addr); 95 qedi_conn->gen_pdu.req_buf = NULL; 96 } 97 } 98 99 static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi, 100 struct qedi_conn *qedi_conn) 101 { 102 qedi_conn->gen_pdu.req_buf = 103 dma_alloc_coherent(&qedi->pdev->dev, 104 ISCSI_DEF_MAX_RECV_SEG_LEN, 105 &qedi_conn->gen_pdu.req_dma_addr, 106 GFP_KERNEL); 107 if (!qedi_conn->gen_pdu.req_buf) 108 goto login_req_buf_failure; 109 110 qedi_conn->gen_pdu.req_buf_size = 0; 111 qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf; 112 113 qedi_conn->gen_pdu.resp_buf = 114 dma_alloc_coherent(&qedi->pdev->dev, 115 ISCSI_DEF_MAX_RECV_SEG_LEN, 116 &qedi_conn->gen_pdu.resp_dma_addr, 117 GFP_KERNEL); 118 if (!qedi_conn->gen_pdu.resp_buf) 119 goto login_resp_buf_failure; 120 121 qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; 122 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf; 123 124 qedi_conn->gen_pdu.req_bd_tbl = 125 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 126 &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL); 127 if (!qedi_conn->gen_pdu.req_bd_tbl) 128 goto login_req_bd_tbl_failure; 129 130 qedi_conn->gen_pdu.resp_bd_tbl = 131 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 132 &qedi_conn->gen_pdu.resp_bd_dma, 133 GFP_KERNEL); 134 if (!qedi_conn->gen_pdu.resp_bd_tbl) 135 goto login_resp_bd_tbl_failure; 136 137 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS, 138 "Allocation successful, cid=0x%x\n", 139 qedi_conn->iscsi_conn_id); 140 return 0; 141 142 login_resp_bd_tbl_failure: 143 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 144 qedi_conn->gen_pdu.req_bd_tbl, 145 qedi_conn->gen_pdu.req_bd_dma); 146 qedi_conn->gen_pdu.req_bd_tbl = NULL; 147 148 login_req_bd_tbl_failure: 149 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 150 qedi_conn->gen_pdu.resp_buf, 151 qedi_conn->gen_pdu.resp_dma_addr); 152 qedi_conn->gen_pdu.resp_buf = NULL; 153 login_resp_buf_failure: 154 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 155 qedi_conn->gen_pdu.req_buf, 156 qedi_conn->gen_pdu.req_dma_addr); 157 qedi_conn->gen_pdu.req_buf = NULL; 158 login_req_buf_failure: 159 iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data, 160 "login resource alloc failed!!\n"); 161 return -ENOMEM; 162 } 163 164 static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi, 165 struct iscsi_session *session) 166 { 167 int i; 168 169 for (i = 0; i < session->cmds_max; i++) { 170 struct iscsi_task *task = session->cmds[i]; 171 struct qedi_cmd *cmd = task->dd_data; 172 173 if (cmd->io_tbl.sge_tbl) 174 dma_free_coherent(&qedi->pdev->dev, 175 QEDI_ISCSI_MAX_BDS_PER_CMD * 176 sizeof(struct scsi_sge), 177 cmd->io_tbl.sge_tbl, 178 cmd->io_tbl.sge_tbl_dma); 179 180 if (cmd->sense_buffer) 181 dma_free_coherent(&qedi->pdev->dev, 182 SCSI_SENSE_BUFFERSIZE, 183 cmd->sense_buffer, 184 cmd->sense_buffer_dma); 185 } 186 } 187 188 static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session, 189 struct qedi_cmd *cmd) 190 { 191 struct qedi_io_bdt *io = &cmd->io_tbl; 192 struct scsi_sge *sge; 193 194 io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev, 195 QEDI_ISCSI_MAX_BDS_PER_CMD * 196 sizeof(*sge), 197 &io->sge_tbl_dma, GFP_KERNEL); 198 if (!io->sge_tbl) { 199 iscsi_session_printk(KERN_ERR, session, 200 "Could not allocate BD table.\n"); 201 return -ENOMEM; 202 } 203 204 io->sge_valid = 0; 205 return 0; 206 } 207 208 static int qedi_setup_cmd_pool(struct qedi_ctx *qedi, 209 struct iscsi_session *session) 210 { 211 int i; 212 213 for (i = 0; i < session->cmds_max; i++) { 214 struct iscsi_task *task = session->cmds[i]; 215 struct qedi_cmd *cmd = task->dd_data; 216 217 task->hdr = &cmd->hdr; 218 task->hdr_max = sizeof(struct iscsi_hdr); 219 220 if (qedi_alloc_sget(qedi, session, cmd)) 221 goto free_sgets; 222 223 cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev, 224 SCSI_SENSE_BUFFERSIZE, 225 &cmd->sense_buffer_dma, 226 GFP_KERNEL); 227 if (!cmd->sense_buffer) 228 goto free_sgets; 229 } 230 231 return 0; 232 233 free_sgets: 234 qedi_destroy_cmd_pool(qedi, session); 235 return -ENOMEM; 236 } 237 238 static struct iscsi_cls_session * 239 qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max, 240 u16 qdepth, uint32_t initial_cmdsn) 241 { 242 struct Scsi_Host *shost; 243 struct iscsi_cls_session *cls_session; 244 struct qedi_ctx *qedi; 245 struct qedi_endpoint *qedi_ep; 246 247 if (!ep) 248 return NULL; 249 250 qedi_ep = ep->dd_data; 251 shost = qedi_ep->qedi->shost; 252 qedi = iscsi_host_priv(shost); 253 254 if (cmds_max > qedi->max_sqes) 255 cmds_max = qedi->max_sqes; 256 else if (cmds_max < QEDI_SQ_WQES_MIN) 257 cmds_max = QEDI_SQ_WQES_MIN; 258 259 cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost, 260 cmds_max, 0, sizeof(struct qedi_cmd), 261 initial_cmdsn, ISCSI_MAX_TARGET); 262 if (!cls_session) { 263 QEDI_ERR(&qedi->dbg_ctx, 264 "Failed to setup session for ep=%p\n", qedi_ep); 265 return NULL; 266 } 267 268 if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) { 269 QEDI_ERR(&qedi->dbg_ctx, 270 "Failed to setup cmd pool for ep=%p\n", qedi_ep); 271 goto session_teardown; 272 } 273 274 return cls_session; 275 276 session_teardown: 277 iscsi_session_teardown(cls_session); 278 return NULL; 279 } 280 281 static void qedi_session_destroy(struct iscsi_cls_session *cls_session) 282 { 283 struct iscsi_session *session = cls_session->dd_data; 284 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 285 struct qedi_ctx *qedi = iscsi_host_priv(shost); 286 287 qedi_destroy_cmd_pool(qedi, session); 288 iscsi_session_teardown(cls_session); 289 } 290 291 static struct iscsi_cls_conn * 292 qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) 293 { 294 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 295 struct qedi_ctx *qedi = iscsi_host_priv(shost); 296 struct iscsi_cls_conn *cls_conn; 297 struct qedi_conn *qedi_conn; 298 struct iscsi_conn *conn; 299 300 cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn), 301 cid); 302 if (!cls_conn) { 303 QEDI_ERR(&qedi->dbg_ctx, 304 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n", 305 cid, cls_session); 306 return NULL; 307 } 308 309 conn = cls_conn->dd_data; 310 qedi_conn = conn->dd_data; 311 qedi_conn->cls_conn = cls_conn; 312 qedi_conn->qedi = qedi; 313 qedi_conn->ep = NULL; 314 qedi_conn->active_cmd_count = 0; 315 INIT_LIST_HEAD(&qedi_conn->active_cmd_list); 316 spin_lock_init(&qedi_conn->list_lock); 317 318 if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) { 319 iscsi_conn_printk(KERN_ALERT, conn, 320 "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n", 321 cid, cls_session); 322 goto free_conn; 323 } 324 325 return cls_conn; 326 327 free_conn: 328 iscsi_conn_teardown(cls_conn); 329 return NULL; 330 } 331 332 void qedi_mark_device_missing(struct iscsi_cls_session *cls_session) 333 { 334 struct iscsi_session *session = cls_session->dd_data; 335 struct qedi_conn *qedi_conn = session->leadconn->dd_data; 336 337 spin_lock_bh(&session->frwd_lock); 338 set_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags); 339 spin_unlock_bh(&session->frwd_lock); 340 } 341 342 void qedi_mark_device_available(struct iscsi_cls_session *cls_session) 343 { 344 struct iscsi_session *session = cls_session->dd_data; 345 struct qedi_conn *qedi_conn = session->leadconn->dd_data; 346 347 spin_lock_bh(&session->frwd_lock); 348 clear_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags); 349 spin_unlock_bh(&session->frwd_lock); 350 } 351 352 static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi, 353 struct qedi_conn *qedi_conn) 354 { 355 u32 iscsi_cid = qedi_conn->iscsi_conn_id; 356 357 if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) { 358 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 359 "conn bind - entry #%d not free\n", 360 iscsi_cid); 361 return -EBUSY; 362 } 363 364 qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn; 365 return 0; 366 } 367 368 struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid) 369 { 370 if (!qedi->cid_que.conn_cid_tbl) { 371 QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n"); 372 return NULL; 373 374 } else if (iscsi_cid >= qedi->max_active_conns) { 375 QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid); 376 return NULL; 377 } 378 return qedi->cid_que.conn_cid_tbl[iscsi_cid]; 379 } 380 381 static int qedi_conn_bind(struct iscsi_cls_session *cls_session, 382 struct iscsi_cls_conn *cls_conn, 383 u64 transport_fd, int is_leading) 384 { 385 struct iscsi_conn *conn = cls_conn->dd_data; 386 struct qedi_conn *qedi_conn = conn->dd_data; 387 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 388 struct qedi_ctx *qedi = iscsi_host_priv(shost); 389 struct qedi_endpoint *qedi_ep; 390 struct iscsi_endpoint *ep; 391 int rc = 0; 392 393 ep = iscsi_lookup_endpoint(transport_fd); 394 if (!ep) 395 return -EINVAL; 396 397 qedi_ep = ep->dd_data; 398 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) || 399 (qedi_ep->state == EP_STATE_TCP_RST_RCVD)) { 400 rc = -EINVAL; 401 goto put_ep; 402 } 403 404 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) { 405 rc = -EINVAL; 406 goto put_ep; 407 } 408 409 410 qedi_ep->conn = qedi_conn; 411 qedi_conn->ep = qedi_ep; 412 qedi_conn->iscsi_ep = ep; 413 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid; 414 qedi_conn->fw_cid = qedi_ep->fw_cid; 415 qedi_conn->cmd_cleanup_req = 0; 416 atomic_set(&qedi_conn->cmd_cleanup_cmpl, 0); 417 418 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn)) { 419 rc = -EINVAL; 420 goto put_ep; 421 } 422 423 424 spin_lock_init(&qedi_conn->tmf_work_lock); 425 INIT_LIST_HEAD(&qedi_conn->tmf_work_list); 426 init_waitqueue_head(&qedi_conn->wait_queue); 427 put_ep: 428 iscsi_put_endpoint(ep); 429 return rc; 430 } 431 432 static int qedi_iscsi_update_conn(struct qedi_ctx *qedi, 433 struct qedi_conn *qedi_conn) 434 { 435 struct qed_iscsi_params_update *conn_info; 436 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn; 437 struct iscsi_conn *conn = cls_conn->dd_data; 438 struct qedi_endpoint *qedi_ep; 439 int rval; 440 441 qedi_ep = qedi_conn->ep; 442 443 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 444 if (!conn_info) { 445 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n"); 446 return -ENOMEM; 447 } 448 449 conn_info->update_flag = 0; 450 451 if (conn->hdrdgst_en) 452 SET_FIELD(conn_info->update_flag, 453 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true); 454 if (conn->datadgst_en) 455 SET_FIELD(conn_info->update_flag, 456 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true); 457 if (conn->session->initial_r2t_en) 458 SET_FIELD(conn_info->update_flag, 459 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T, 460 true); 461 if (conn->session->imm_data_en) 462 SET_FIELD(conn_info->update_flag, 463 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA, 464 true); 465 466 conn_info->max_seq_size = conn->session->max_burst; 467 conn_info->max_recv_pdu_length = conn->max_recv_dlength; 468 conn_info->max_send_pdu_length = conn->max_xmit_dlength; 469 conn_info->first_seq_length = conn->session->first_burst; 470 conn_info->exp_stat_sn = conn->exp_statsn; 471 472 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle, 473 conn_info); 474 if (rval) { 475 rval = -ENXIO; 476 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n"); 477 } 478 479 kfree(conn_info); 480 return rval; 481 } 482 483 static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en) 484 { 485 u16 mss = 0; 486 u16 hdrs = TCP_HDR_LEN; 487 488 if (is_ipv6) 489 hdrs += IPV6_HDR_LEN; 490 else 491 hdrs += IPV4_HDR_LEN; 492 493 mss = pmtu - hdrs; 494 495 if (!mss) 496 mss = DEF_MSS; 497 498 return mss; 499 } 500 501 static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep) 502 { 503 struct qed_iscsi_params_offload *conn_info; 504 struct qedi_ctx *qedi = qedi_ep->qedi; 505 int rval; 506 int i; 507 508 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 509 if (!conn_info) { 510 QEDI_ERR(&qedi->dbg_ctx, 511 "Failed to allocate memory ep=%p\n", qedi_ep); 512 return -ENOMEM; 513 } 514 515 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac); 516 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac); 517 518 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]); 519 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]); 520 521 if (qedi_ep->ip_type == TCP_IPV4) { 522 conn_info->ip_version = 0; 523 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 524 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n", 525 qedi_ep->src_addr, qedi_ep->dst_addr); 526 } else { 527 for (i = 1; i < 4; i++) { 528 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]); 529 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]); 530 } 531 532 conn_info->ip_version = 1; 533 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 534 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n", 535 qedi_ep->src_addr, qedi_ep->dst_addr); 536 } 537 538 conn_info->src.port = qedi_ep->src_port; 539 conn_info->dst.port = qedi_ep->dst_port; 540 541 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE; 542 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma; 543 conn_info->vlan_id = qedi_ep->vlan_id; 544 545 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1); 546 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1); 547 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1); 548 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1); 549 550 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues); 551 552 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT; 553 conn_info->dup_ack_theshold = 3; 554 conn_info->rcv_wnd = 65535; 555 556 conn_info->ss_thresh = 65535; 557 conn_info->srtt = 300; 558 conn_info->rtt_var = 150; 559 conn_info->flow_label = 0; 560 conn_info->ka_timeout = DEF_KA_TIMEOUT; 561 conn_info->ka_interval = DEF_KA_INTERVAL; 562 conn_info->max_rt_time = DEF_MAX_RT_TIME; 563 conn_info->ttl = DEF_TTL; 564 conn_info->tos_or_tc = DEF_TOS; 565 conn_info->remote_port = qedi_ep->dst_port; 566 conn_info->local_port = qedi_ep->src_port; 567 568 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu, 569 (qedi_ep->ip_type == TCP_IPV6), 570 1, (qedi_ep->vlan_id != 0)); 571 572 conn_info->cwnd = DEF_MAX_CWND * conn_info->mss; 573 conn_info->rcv_wnd_scale = 4; 574 conn_info->da_timeout_value = 200; 575 conn_info->ack_frequency = 2; 576 577 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 578 "Default cq index [%d], mss [%d]\n", 579 conn_info->default_cq, conn_info->mss); 580 581 /* Prepare the doorbell parameters */ 582 qedi_ep->db_data.agg_flags = 0; 583 qedi_ep->db_data.params = 0; 584 SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_DEST, DB_DEST_XCM); 585 SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_AGG_CMD, 586 DB_AGG_CMD_MAX); 587 SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_AGG_VAL_SEL, 588 DQ_XCM_ISCSI_SQ_PROD_CMD); 589 SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_BYPASS_EN, 1); 590 591 /* Register doorbell with doorbell recovery mechanism */ 592 rval = qedi_ops->common->db_recovery_add(qedi->cdev, 593 qedi_ep->p_doorbell, 594 &qedi_ep->db_data, 595 DB_REC_WIDTH_32B, 596 DB_REC_KERNEL); 597 if (rval) { 598 kfree(conn_info); 599 return rval; 600 } 601 602 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info); 603 if (rval) { 604 /* delete doorbell from doorbell recovery mechanism */ 605 rval = qedi_ops->common->db_recovery_del(qedi->cdev, 606 qedi_ep->p_doorbell, 607 &qedi_ep->db_data); 608 609 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n", 610 rval, qedi_ep); 611 } 612 613 kfree(conn_info); 614 return rval; 615 } 616 617 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn) 618 { 619 struct iscsi_conn *conn = cls_conn->dd_data; 620 struct qedi_conn *qedi_conn = conn->dd_data; 621 struct qedi_ctx *qedi; 622 int rval; 623 624 qedi = qedi_conn->qedi; 625 626 rval = qedi_iscsi_update_conn(qedi, qedi_conn); 627 if (rval) { 628 iscsi_conn_printk(KERN_ALERT, conn, 629 "conn_start: FW offload conn failed.\n"); 630 rval = -EINVAL; 631 goto start_err; 632 } 633 634 spin_lock(&qedi_conn->tmf_work_lock); 635 qedi_conn->fw_cleanup_works = 0; 636 qedi_conn->ep_disconnect_starting = false; 637 spin_unlock(&qedi_conn->tmf_work_lock); 638 639 qedi_conn->abrt_conn = 0; 640 641 rval = iscsi_conn_start(cls_conn); 642 if (rval) { 643 iscsi_conn_printk(KERN_ALERT, conn, 644 "iscsi_conn_start: FW offload conn failed!!\n"); 645 } 646 647 start_err: 648 return rval; 649 } 650 651 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn) 652 { 653 struct iscsi_conn *conn = cls_conn->dd_data; 654 struct qedi_conn *qedi_conn = conn->dd_data; 655 struct Scsi_Host *shost; 656 struct qedi_ctx *qedi; 657 658 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 659 qedi = iscsi_host_priv(shost); 660 661 qedi_conn_free_login_resources(qedi, qedi_conn); 662 iscsi_conn_teardown(cls_conn); 663 } 664 665 static int qedi_ep_get_param(struct iscsi_endpoint *ep, 666 enum iscsi_param param, char *buf) 667 { 668 struct qedi_endpoint *qedi_ep = ep->dd_data; 669 int len; 670 671 if (!qedi_ep) 672 return -ENOTCONN; 673 674 switch (param) { 675 case ISCSI_PARAM_CONN_PORT: 676 len = sprintf(buf, "%hu\n", qedi_ep->dst_port); 677 break; 678 case ISCSI_PARAM_CONN_ADDRESS: 679 if (qedi_ep->ip_type == TCP_IPV4) 680 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr); 681 else 682 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr); 683 break; 684 default: 685 return -ENOTCONN; 686 } 687 688 return len; 689 } 690 691 static int qedi_host_get_param(struct Scsi_Host *shost, 692 enum iscsi_host_param param, char *buf) 693 { 694 struct qedi_ctx *qedi; 695 int len; 696 697 qedi = iscsi_host_priv(shost); 698 699 switch (param) { 700 case ISCSI_HOST_PARAM_HWADDRESS: 701 len = sysfs_format_mac(buf, qedi->mac, 6); 702 break; 703 case ISCSI_HOST_PARAM_NETDEV_NAME: 704 len = sprintf(buf, "host%d\n", shost->host_no); 705 break; 706 case ISCSI_HOST_PARAM_IPADDRESS: 707 if (qedi->ip_type == TCP_IPV4) 708 len = sprintf(buf, "%pI4\n", qedi->src_ip); 709 else 710 len = sprintf(buf, "%pI6\n", qedi->src_ip); 711 break; 712 default: 713 return iscsi_host_get_param(shost, param, buf); 714 } 715 716 return len; 717 } 718 719 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 720 struct iscsi_stats *stats) 721 { 722 struct iscsi_conn *conn = cls_conn->dd_data; 723 struct qed_iscsi_stats iscsi_stats; 724 struct Scsi_Host *shost; 725 struct qedi_ctx *qedi; 726 727 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 728 qedi = iscsi_host_priv(shost); 729 qedi_ops->get_stats(qedi->cdev, &iscsi_stats); 730 731 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt; 732 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt; 733 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt; 734 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt; 735 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt; 736 737 stats->txdata_octets = conn->txdata_octets; 738 stats->rxdata_octets = conn->rxdata_octets; 739 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 740 stats->dataout_pdus = conn->dataout_pdus_cnt; 741 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 742 stats->datain_pdus = conn->datain_pdus_cnt; 743 stats->r2t_pdus = conn->r2t_pdus_cnt; 744 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 745 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 746 stats->digest_err = 0; 747 stats->timeout_err = 0; 748 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 749 stats->custom[0].value = conn->eh_abort_cnt; 750 stats->custom_length = 1; 751 } 752 753 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn) 754 { 755 struct scsi_sge *bd_tbl; 756 757 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 758 759 bd_tbl->sge_addr.hi = 760 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); 761 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr; 762 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr - 763 qedi_conn->gen_pdu.req_buf; 764 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 765 bd_tbl->sge_addr.hi = 766 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); 767 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr; 768 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN; 769 } 770 771 static int qedi_iscsi_send_generic_request(struct iscsi_task *task) 772 { 773 struct qedi_cmd *cmd = task->dd_data; 774 struct qedi_conn *qedi_conn = cmd->conn; 775 char *buf; 776 int data_len; 777 int rc = 0; 778 779 qedi_iscsi_prep_generic_pdu_bd(qedi_conn); 780 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { 781 case ISCSI_OP_LOGIN: 782 qedi_send_iscsi_login(qedi_conn, task); 783 break; 784 case ISCSI_OP_NOOP_OUT: 785 data_len = qedi_conn->gen_pdu.req_buf_size; 786 buf = qedi_conn->gen_pdu.req_buf; 787 if (data_len) 788 rc = qedi_send_iscsi_nopout(qedi_conn, task, 789 buf, data_len, 1); 790 else 791 rc = qedi_send_iscsi_nopout(qedi_conn, task, 792 NULL, 0, 1); 793 break; 794 case ISCSI_OP_LOGOUT: 795 rc = qedi_send_iscsi_logout(qedi_conn, task); 796 break; 797 case ISCSI_OP_SCSI_TMFUNC: 798 rc = qedi_send_iscsi_tmf(qedi_conn, task); 799 break; 800 case ISCSI_OP_TEXT: 801 rc = qedi_send_iscsi_text(qedi_conn, task); 802 break; 803 default: 804 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 805 "unsupported op 0x%x\n", task->hdr->opcode); 806 } 807 808 return rc; 809 } 810 811 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 812 { 813 struct qedi_conn *qedi_conn = conn->dd_data; 814 struct qedi_cmd *cmd = task->dd_data; 815 816 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); 817 818 qedi_conn->gen_pdu.req_buf_size = task->data_count; 819 820 if (task->data_count) { 821 memcpy(qedi_conn->gen_pdu.req_buf, task->data, 822 task->data_count); 823 qedi_conn->gen_pdu.req_wr_ptr = 824 qedi_conn->gen_pdu.req_buf + task->data_count; 825 } 826 827 cmd->conn = conn->dd_data; 828 return qedi_iscsi_send_generic_request(task); 829 } 830 831 static int qedi_task_xmit(struct iscsi_task *task) 832 { 833 struct iscsi_conn *conn = task->conn; 834 struct qedi_conn *qedi_conn = conn->dd_data; 835 struct qedi_cmd *cmd = task->dd_data; 836 struct scsi_cmnd *sc = task->sc; 837 838 /* Clear now so in cleanup_task we know it didn't make it */ 839 cmd->scsi_cmd = NULL; 840 cmd->task_id = U16_MAX; 841 842 if (test_bit(QEDI_IN_SHUTDOWN, &qedi_conn->qedi->flags)) 843 return -ENODEV; 844 845 if (test_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags)) 846 return -EACCES; 847 848 cmd->state = 0; 849 cmd->task = NULL; 850 cmd->use_slowpath = false; 851 cmd->conn = qedi_conn; 852 cmd->task = task; 853 cmd->io_cmd_in_list = false; 854 INIT_LIST_HEAD(&cmd->io_cmd); 855 856 if (!sc) 857 return qedi_mtask_xmit(conn, task); 858 859 cmd->scsi_cmd = sc; 860 return qedi_iscsi_send_ioreq(task); 861 } 862 863 static void qedi_offload_work(struct work_struct *work) 864 { 865 struct qedi_endpoint *qedi_ep = 866 container_of(work, struct qedi_endpoint, offload_work); 867 struct qedi_ctx *qedi; 868 int wait_delay = 5 * HZ; 869 int ret; 870 871 qedi = qedi_ep->qedi; 872 873 ret = qedi_iscsi_offload_conn(qedi_ep); 874 if (ret) { 875 QEDI_ERR(&qedi->dbg_ctx, 876 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n", 877 qedi_ep->iscsi_cid, qedi_ep, ret); 878 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 879 return; 880 } 881 882 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait, 883 (qedi_ep->state == 884 EP_STATE_OFLDCONN_COMPL), 885 wait_delay); 886 if (ret <= 0 || qedi_ep->state != EP_STATE_OFLDCONN_COMPL) { 887 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 888 QEDI_ERR(&qedi->dbg_ctx, 889 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n", 890 qedi_ep->iscsi_cid, qedi_ep); 891 } 892 } 893 894 static struct iscsi_endpoint * 895 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 896 int non_blocking) 897 { 898 struct qedi_ctx *qedi; 899 struct iscsi_endpoint *ep; 900 struct qedi_endpoint *qedi_ep; 901 struct sockaddr_in *addr; 902 struct sockaddr_in6 *addr6; 903 struct iscsi_path path_req; 904 u32 msg_type = ISCSI_KEVENT_IF_DOWN; 905 u32 iscsi_cid = QEDI_CID_RESERVED; 906 u16 len = 0; 907 char *buf = NULL; 908 int ret, tmp; 909 910 if (!shost) { 911 ret = -ENXIO; 912 QEDI_ERR(NULL, "shost is NULL\n"); 913 return ERR_PTR(ret); 914 } 915 916 if (qedi_do_not_recover) { 917 ret = -ENOMEM; 918 return ERR_PTR(ret); 919 } 920 921 qedi = iscsi_host_priv(shost); 922 923 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) || 924 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 925 ret = -ENOMEM; 926 return ERR_PTR(ret); 927 } 928 929 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) { 930 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n"); 931 return ERR_PTR(-ENXIO); 932 } 933 934 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint)); 935 if (!ep) { 936 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n"); 937 ret = -ENOMEM; 938 return ERR_PTR(ret); 939 } 940 qedi_ep = ep->dd_data; 941 memset(qedi_ep, 0, sizeof(struct qedi_endpoint)); 942 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work); 943 qedi_ep->state = EP_STATE_IDLE; 944 qedi_ep->iscsi_cid = (u32)-1; 945 qedi_ep->qedi = qedi; 946 947 if (dst_addr->sa_family == AF_INET) { 948 addr = (struct sockaddr_in *)dst_addr; 949 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr, 950 sizeof(struct in_addr)); 951 qedi_ep->dst_port = ntohs(addr->sin_port); 952 qedi_ep->ip_type = TCP_IPV4; 953 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 954 "dst_addr=%pI4, dst_port=%u\n", 955 qedi_ep->dst_addr, qedi_ep->dst_port); 956 } else if (dst_addr->sa_family == AF_INET6) { 957 addr6 = (struct sockaddr_in6 *)dst_addr; 958 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr, 959 sizeof(struct in6_addr)); 960 qedi_ep->dst_port = ntohs(addr6->sin6_port); 961 qedi_ep->ip_type = TCP_IPV6; 962 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 963 "dst_addr=%pI6, dst_port=%u\n", 964 qedi_ep->dst_addr, qedi_ep->dst_port); 965 } else { 966 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n"); 967 } 968 969 ret = qedi_alloc_sq(qedi, qedi_ep); 970 if (ret) 971 goto ep_conn_exit; 972 973 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle, 974 &qedi_ep->fw_cid, &qedi_ep->p_doorbell); 975 976 if (ret) { 977 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n"); 978 ret = -ENXIO; 979 goto ep_free_sq; 980 } 981 982 iscsi_cid = qedi_ep->handle; 983 qedi_ep->iscsi_cid = iscsi_cid; 984 985 init_waitqueue_head(&qedi_ep->ofld_wait); 986 init_waitqueue_head(&qedi_ep->tcp_ofld_wait); 987 qedi_ep->state = EP_STATE_OFLDCONN_START; 988 qedi->ep_tbl[iscsi_cid] = qedi_ep; 989 990 buf = (char *)&path_req; 991 len = sizeof(path_req); 992 memset(&path_req, 0, len); 993 994 msg_type = ISCSI_KEVENT_PATH_REQ; 995 path_req.handle = (u64)qedi_ep->iscsi_cid; 996 path_req.pmtu = qedi->ll2_mtu; 997 qedi_ep->pmtu = qedi->ll2_mtu; 998 if (qedi_ep->ip_type == TCP_IPV4) { 999 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr, 1000 sizeof(struct in_addr)); 1001 path_req.ip_addr_len = 4; 1002 } else { 1003 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr, 1004 sizeof(struct in6_addr)); 1005 path_req.ip_addr_len = 16; 1006 } 1007 1008 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf, 1009 len); 1010 if (ret) { 1011 QEDI_ERR(&qedi->dbg_ctx, 1012 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n", 1013 iscsi_cid, ret); 1014 goto ep_rel_conn; 1015 } 1016 1017 atomic_inc(&qedi->num_offloads); 1018 return ep; 1019 1020 ep_rel_conn: 1021 qedi->ep_tbl[iscsi_cid] = NULL; 1022 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 1023 if (tmp) 1024 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n", 1025 tmp); 1026 ep_free_sq: 1027 qedi_free_sq(qedi, qedi_ep); 1028 ep_conn_exit: 1029 iscsi_destroy_endpoint(ep); 1030 return ERR_PTR(ret); 1031 } 1032 1033 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 1034 { 1035 struct qedi_endpoint *qedi_ep; 1036 int ret = 0; 1037 1038 if (qedi_do_not_recover) 1039 return 1; 1040 1041 qedi_ep = ep->dd_data; 1042 if (qedi_ep->state == EP_STATE_IDLE || 1043 qedi_ep->state == EP_STATE_OFLDCONN_NONE || 1044 qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 1045 return -1; 1046 1047 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL) 1048 ret = 1; 1049 1050 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait, 1051 QEDI_OFLD_WAIT_STATE(qedi_ep), 1052 msecs_to_jiffies(timeout_ms)); 1053 1054 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 1055 ret = -1; 1056 1057 if (ret > 0) 1058 return 1; 1059 else if (!ret) 1060 return 0; 1061 else 1062 return ret; 1063 } 1064 1065 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn) 1066 { 1067 struct qedi_cmd *cmd, *cmd_tmp; 1068 1069 spin_lock(&qedi_conn->list_lock); 1070 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list, 1071 io_cmd) { 1072 list_del_init(&cmd->io_cmd); 1073 qedi_conn->active_cmd_count--; 1074 } 1075 spin_unlock(&qedi_conn->list_lock); 1076 } 1077 1078 static void qedi_ep_disconnect(struct iscsi_endpoint *ep) 1079 { 1080 struct qedi_endpoint *qedi_ep; 1081 struct qedi_conn *qedi_conn = NULL; 1082 struct qedi_ctx *qedi; 1083 int ret = 0; 1084 int wait_delay; 1085 int abrt_conn = 0; 1086 1087 wait_delay = 60 * HZ + DEF_MAX_RT_TIME; 1088 qedi_ep = ep->dd_data; 1089 qedi = qedi_ep->qedi; 1090 1091 flush_work(&qedi_ep->offload_work); 1092 1093 if (qedi_ep->state == EP_STATE_OFLDCONN_START) 1094 goto ep_exit_recover; 1095 1096 if (qedi_ep->conn) { 1097 qedi_conn = qedi_ep->conn; 1098 abrt_conn = qedi_conn->abrt_conn; 1099 1100 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1101 "cid=0x%x qedi_ep=%p waiting for %d tmfs\n", 1102 qedi_ep->iscsi_cid, qedi_ep, 1103 qedi_conn->fw_cleanup_works); 1104 1105 spin_lock(&qedi_conn->tmf_work_lock); 1106 qedi_conn->ep_disconnect_starting = true; 1107 while (qedi_conn->fw_cleanup_works > 0) { 1108 spin_unlock(&qedi_conn->tmf_work_lock); 1109 msleep(1000); 1110 spin_lock(&qedi_conn->tmf_work_lock); 1111 } 1112 spin_unlock(&qedi_conn->tmf_work_lock); 1113 1114 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 1115 if (qedi_do_not_recover) { 1116 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1117 "Do not recover cid=0x%x\n", 1118 qedi_ep->iscsi_cid); 1119 goto ep_exit_recover; 1120 } 1121 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1122 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n", 1123 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state); 1124 qedi_cleanup_active_cmd_list(qedi_conn); 1125 goto ep_release_conn; 1126 } 1127 } 1128 1129 if (qedi_do_not_recover) 1130 goto ep_exit_recover; 1131 1132 switch (qedi_ep->state) { 1133 case EP_STATE_OFLDCONN_START: 1134 case EP_STATE_OFLDCONN_NONE: 1135 goto ep_release_conn; 1136 case EP_STATE_OFLDCONN_FAILED: 1137 break; 1138 case EP_STATE_OFLDCONN_COMPL: 1139 if (unlikely(!qedi_conn)) 1140 break; 1141 1142 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1143 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n", 1144 qedi_conn->active_cmd_count, abrt_conn, 1145 qedi_ep->state, 1146 qedi_ep->iscsi_cid, 1147 qedi_ep->conn 1148 ); 1149 1150 if (!qedi_conn->active_cmd_count) 1151 abrt_conn = 0; 1152 else 1153 abrt_conn = 1; 1154 1155 if (abrt_conn) 1156 qedi_clearsq(qedi, qedi_conn, NULL); 1157 break; 1158 default: 1159 break; 1160 } 1161 1162 if (!abrt_conn) 1163 wait_delay += qedi->pf_params.iscsi_pf_params.two_msl_timer; 1164 1165 qedi_ep->state = EP_STATE_DISCONN_START; 1166 1167 if (test_bit(QEDI_IN_SHUTDOWN, &qedi->flags) || 1168 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) 1169 goto ep_release_conn; 1170 1171 /* Delete doorbell from doorbell recovery mechanism */ 1172 ret = qedi_ops->common->db_recovery_del(qedi->cdev, 1173 qedi_ep->p_doorbell, 1174 &qedi_ep->db_data); 1175 1176 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn); 1177 if (ret) { 1178 QEDI_WARN(&qedi->dbg_ctx, 1179 "destroy_conn failed returned %d\n", ret); 1180 } else { 1181 ret = wait_event_interruptible_timeout( 1182 qedi_ep->tcp_ofld_wait, 1183 (qedi_ep->state != 1184 EP_STATE_DISCONN_START), 1185 wait_delay); 1186 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) { 1187 QEDI_WARN(&qedi->dbg_ctx, 1188 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n", 1189 ret, wait_delay, qedi_ep->iscsi_cid); 1190 } 1191 } 1192 1193 ep_release_conn: 1194 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 1195 if (ret) 1196 QEDI_WARN(&qedi->dbg_ctx, 1197 "release_conn returned %d, cid=0x%x\n", 1198 ret, qedi_ep->iscsi_cid); 1199 ep_exit_recover: 1200 qedi_ep->state = EP_STATE_IDLE; 1201 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL; 1202 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL; 1203 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port); 1204 qedi_free_sq(qedi, qedi_ep); 1205 1206 if (qedi_conn) 1207 qedi_conn->ep = NULL; 1208 1209 qedi_ep->conn = NULL; 1210 qedi_ep->qedi = NULL; 1211 atomic_dec(&qedi->num_offloads); 1212 1213 iscsi_destroy_endpoint(ep); 1214 } 1215 1216 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid) 1217 { 1218 struct qed_dev *cdev = qedi->cdev; 1219 struct qedi_uio_dev *udev; 1220 struct qedi_uio_ctrl *uctrl; 1221 struct sk_buff *skb; 1222 u32 len; 1223 int rc = 0; 1224 1225 udev = qedi->udev; 1226 if (!udev) { 1227 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n"); 1228 return -EINVAL; 1229 } 1230 1231 uctrl = (struct qedi_uio_ctrl *)udev->uctrl; 1232 if (!uctrl) { 1233 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n"); 1234 return -EINVAL; 1235 } 1236 1237 len = uctrl->host_tx_pkt_len; 1238 if (!len) { 1239 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len); 1240 return -EINVAL; 1241 } 1242 1243 skb = alloc_skb(len, GFP_ATOMIC); 1244 if (!skb) { 1245 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n"); 1246 return -EINVAL; 1247 } 1248 1249 skb_put(skb, len); 1250 memcpy(skb->data, udev->tx_pkt, len); 1251 skb->ip_summed = CHECKSUM_NONE; 1252 1253 if (vlanid) 1254 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); 1255 1256 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0); 1257 if (rc) { 1258 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n", 1259 rc); 1260 kfree_skb(skb); 1261 } 1262 1263 uctrl->host_tx_pkt_len = 0; 1264 uctrl->hw_tx_cons++; 1265 1266 return rc; 1267 } 1268 1269 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data) 1270 { 1271 struct qedi_ctx *qedi; 1272 struct qedi_endpoint *qedi_ep; 1273 int ret = 0; 1274 u32 iscsi_cid; 1275 u16 port_id = 0; 1276 1277 if (!shost) { 1278 ret = -ENXIO; 1279 QEDI_ERR(NULL, "shost is NULL\n"); 1280 return ret; 1281 } 1282 1283 if (strcmp(shost->hostt->proc_name, "qedi")) { 1284 ret = -ENXIO; 1285 QEDI_ERR(NULL, "shost %s is invalid\n", 1286 shost->hostt->proc_name); 1287 return ret; 1288 } 1289 1290 qedi = iscsi_host_priv(shost); 1291 if (path_data->handle == QEDI_PATH_HANDLE) { 1292 ret = qedi_data_avail(qedi, path_data->vlan_id); 1293 goto set_path_exit; 1294 } 1295 1296 iscsi_cid = (u32)path_data->handle; 1297 if (iscsi_cid >= qedi->max_active_conns) { 1298 ret = -EINVAL; 1299 goto set_path_exit; 1300 } 1301 qedi_ep = qedi->ep_tbl[iscsi_cid]; 1302 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1303 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); 1304 if (!qedi_ep) { 1305 ret = -EINVAL; 1306 goto set_path_exit; 1307 } 1308 1309 if (!is_valid_ether_addr(&path_data->mac_addr[0])) { 1310 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n"); 1311 qedi_ep->state = EP_STATE_OFLDCONN_NONE; 1312 ret = -EIO; 1313 goto set_path_exit; 1314 } 1315 1316 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]); 1317 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]); 1318 1319 qedi_ep->vlan_id = path_data->vlan_id; 1320 if (path_data->pmtu < DEF_PATH_MTU) { 1321 qedi_ep->pmtu = qedi->ll2_mtu; 1322 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1323 "MTU cannot be %u, using default MTU %u\n", 1324 path_data->pmtu, qedi_ep->pmtu); 1325 } 1326 1327 if (path_data->pmtu != qedi->ll2_mtu) { 1328 if (path_data->pmtu > JUMBO_MTU) { 1329 ret = -EINVAL; 1330 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu); 1331 goto set_path_exit; 1332 } 1333 1334 qedi_reset_host_mtu(qedi, path_data->pmtu); 1335 qedi_ep->pmtu = qedi->ll2_mtu; 1336 } 1337 1338 port_id = qedi_ep->src_port; 1339 if (port_id >= QEDI_LOCAL_PORT_MIN && 1340 port_id < QEDI_LOCAL_PORT_MAX) { 1341 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id)) 1342 port_id = 0; 1343 } else { 1344 port_id = 0; 1345 } 1346 1347 if (!port_id) { 1348 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl); 1349 if (port_id == QEDI_LOCAL_PORT_INVALID) { 1350 QEDI_ERR(&qedi->dbg_ctx, 1351 "Failed to allocate port id for iscsi_cid=0x%x\n", 1352 iscsi_cid); 1353 ret = -ENOMEM; 1354 goto set_path_exit; 1355 } 1356 } 1357 1358 qedi_ep->src_port = port_id; 1359 1360 if (qedi_ep->ip_type == TCP_IPV4) { 1361 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr, 1362 sizeof(struct in_addr)); 1363 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr, 1364 sizeof(struct in_addr)); 1365 qedi->ip_type = TCP_IPV4; 1366 1367 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1368 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n", 1369 qedi_ep->src_addr, qedi_ep->src_port, 1370 qedi_ep->dst_addr, qedi_ep->dst_port); 1371 } else { 1372 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr, 1373 sizeof(struct in6_addr)); 1374 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr, 1375 sizeof(struct in6_addr)); 1376 qedi->ip_type = TCP_IPV6; 1377 1378 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1379 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n", 1380 qedi_ep->src_addr, qedi_ep->src_port, 1381 qedi_ep->dst_addr, qedi_ep->dst_port); 1382 } 1383 1384 queue_work(qedi->offload_thread, &qedi_ep->offload_work); 1385 1386 ret = 0; 1387 1388 set_path_exit: 1389 return ret; 1390 } 1391 1392 static umode_t qedi_attr_is_visible(int param_type, int param) 1393 { 1394 switch (param_type) { 1395 case ISCSI_HOST_PARAM: 1396 switch (param) { 1397 case ISCSI_HOST_PARAM_NETDEV_NAME: 1398 case ISCSI_HOST_PARAM_HWADDRESS: 1399 case ISCSI_HOST_PARAM_IPADDRESS: 1400 return 0444; 1401 default: 1402 return 0; 1403 } 1404 case ISCSI_PARAM: 1405 switch (param) { 1406 case ISCSI_PARAM_MAX_RECV_DLENGTH: 1407 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 1408 case ISCSI_PARAM_HDRDGST_EN: 1409 case ISCSI_PARAM_DATADGST_EN: 1410 case ISCSI_PARAM_CONN_ADDRESS: 1411 case ISCSI_PARAM_CONN_PORT: 1412 case ISCSI_PARAM_EXP_STATSN: 1413 case ISCSI_PARAM_PERSISTENT_ADDRESS: 1414 case ISCSI_PARAM_PERSISTENT_PORT: 1415 case ISCSI_PARAM_PING_TMO: 1416 case ISCSI_PARAM_RECV_TMO: 1417 case ISCSI_PARAM_INITIAL_R2T_EN: 1418 case ISCSI_PARAM_MAX_R2T: 1419 case ISCSI_PARAM_IMM_DATA_EN: 1420 case ISCSI_PARAM_FIRST_BURST: 1421 case ISCSI_PARAM_MAX_BURST: 1422 case ISCSI_PARAM_PDU_INORDER_EN: 1423 case ISCSI_PARAM_DATASEQ_INORDER_EN: 1424 case ISCSI_PARAM_ERL: 1425 case ISCSI_PARAM_TARGET_NAME: 1426 case ISCSI_PARAM_TPGT: 1427 case ISCSI_PARAM_USERNAME: 1428 case ISCSI_PARAM_PASSWORD: 1429 case ISCSI_PARAM_USERNAME_IN: 1430 case ISCSI_PARAM_PASSWORD_IN: 1431 case ISCSI_PARAM_FAST_ABORT: 1432 case ISCSI_PARAM_ABORT_TMO: 1433 case ISCSI_PARAM_LU_RESET_TMO: 1434 case ISCSI_PARAM_TGT_RESET_TMO: 1435 case ISCSI_PARAM_IFACE_NAME: 1436 case ISCSI_PARAM_INITIATOR_NAME: 1437 case ISCSI_PARAM_BOOT_ROOT: 1438 case ISCSI_PARAM_BOOT_NIC: 1439 case ISCSI_PARAM_BOOT_TARGET: 1440 return 0444; 1441 default: 1442 return 0; 1443 } 1444 } 1445 1446 return 0; 1447 } 1448 1449 static void qedi_cleanup_task(struct iscsi_task *task) 1450 { 1451 struct qedi_cmd *cmd; 1452 1453 if (task->state == ISCSI_TASK_PENDING) { 1454 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n", 1455 refcount_read(&task->refcount)); 1456 return; 1457 } 1458 1459 if (task->sc) 1460 qedi_iscsi_unmap_sg_list(task->dd_data); 1461 1462 cmd = task->dd_data; 1463 if (cmd->task_id != U16_MAX) 1464 qedi_clear_task_idx(iscsi_host_priv(task->conn->session->host), 1465 cmd->task_id); 1466 1467 cmd->task_id = U16_MAX; 1468 cmd->scsi_cmd = NULL; 1469 } 1470 1471 struct iscsi_transport qedi_iscsi_transport = { 1472 .owner = THIS_MODULE, 1473 .name = QEDI_MODULE_NAME, 1474 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST | 1475 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO, 1476 .create_session = qedi_session_create, 1477 .destroy_session = qedi_session_destroy, 1478 .create_conn = qedi_conn_create, 1479 .bind_conn = qedi_conn_bind, 1480 .unbind_conn = iscsi_conn_unbind, 1481 .start_conn = qedi_conn_start, 1482 .stop_conn = iscsi_conn_stop, 1483 .destroy_conn = qedi_conn_destroy, 1484 .set_param = iscsi_set_param, 1485 .get_ep_param = qedi_ep_get_param, 1486 .get_conn_param = iscsi_conn_get_param, 1487 .get_session_param = iscsi_session_get_param, 1488 .get_host_param = qedi_host_get_param, 1489 .send_pdu = iscsi_conn_send_pdu, 1490 .get_stats = qedi_conn_get_stats, 1491 .xmit_task = qedi_task_xmit, 1492 .cleanup_task = qedi_cleanup_task, 1493 .session_recovery_timedout = iscsi_session_recovery_timedout, 1494 .ep_connect = qedi_ep_connect, 1495 .ep_poll = qedi_ep_poll, 1496 .ep_disconnect = qedi_ep_disconnect, 1497 .set_path = qedi_set_path, 1498 .attr_is_visible = qedi_attr_is_visible, 1499 }; 1500 1501 void qedi_start_conn_recovery(struct qedi_ctx *qedi, 1502 struct qedi_conn *qedi_conn) 1503 { 1504 struct iscsi_cls_session *cls_sess; 1505 struct iscsi_cls_conn *cls_conn; 1506 struct iscsi_conn *conn; 1507 1508 cls_conn = qedi_conn->cls_conn; 1509 conn = cls_conn->dd_data; 1510 cls_sess = iscsi_conn_to_session(cls_conn); 1511 1512 if (iscsi_is_session_online(cls_sess)) { 1513 qedi_conn->abrt_conn = 1; 1514 QEDI_ERR(&qedi->dbg_ctx, 1515 "Failing connection, state=0x%x, cid=0x%x\n", 1516 conn->session->state, qedi_conn->iscsi_conn_id); 1517 iscsi_conn_failure(qedi_conn->cls_conn->dd_data, 1518 ISCSI_ERR_CONN_FAILED); 1519 } 1520 } 1521 1522 static const struct { 1523 enum iscsi_error_types error_code; 1524 char *err_string; 1525 } qedi_iscsi_error[] = { 1526 { ISCSI_STATUS_NONE, 1527 "tcp_error none" 1528 }, 1529 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH, 1530 "task cid mismatch" 1531 }, 1532 { ISCSI_CONN_ERROR_TASK_NOT_VALID, 1533 "invalid task" 1534 }, 1535 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL, 1536 "rq ring full" 1537 }, 1538 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL, 1539 "cmdq ring full" 1540 }, 1541 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED, 1542 "sge caching failed" 1543 }, 1544 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR, 1545 "hdr digest error" 1546 }, 1547 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR, 1548 "local cmpl error" 1549 }, 1550 { ISCSI_CONN_ERROR_DATA_OVERRUN, 1551 "invalid task" 1552 }, 1553 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR, 1554 "out of sge error" 1555 }, 1556 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR, 1557 "tcp ip fragment error" 1558 }, 1559 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN, 1560 "AHS len protocol error" 1561 }, 1562 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE, 1563 "itt out of range error" 1564 }, 1565 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE, 1566 "data seg more than pdu size" 1567 }, 1568 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE, 1569 "invalid opcode" 1570 }, 1571 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE, 1572 "invalid opcode before update" 1573 }, 1574 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL, 1575 "unexpected opcode" 1576 }, 1577 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA, 1578 "r2t carries no data" 1579 }, 1580 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN, 1581 "data sn error" 1582 }, 1583 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT, 1584 "data TTT error" 1585 }, 1586 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT, 1587 "r2t TTT error" 1588 }, 1589 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET, 1590 "buffer offset error" 1591 }, 1592 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO, 1593 "buffer offset ooo" 1594 }, 1595 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN, 1596 "data seg len 0" 1597 }, 1598 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0, 1599 "data xer len error" 1600 }, 1601 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1, 1602 "data xer len1 error" 1603 }, 1604 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2, 1605 "data xer len2 error" 1606 }, 1607 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN, 1608 "protocol lun error" 1609 }, 1610 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO, 1611 "f bit zero error" 1612 }, 1613 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN, 1614 "exp stat sn error" 1615 }, 1616 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO, 1617 "dsl not zero error" 1618 }, 1619 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL, 1620 "invalid dsl" 1621 }, 1622 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG, 1623 "data seg len too big" 1624 }, 1625 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT, 1626 "outstanding r2t count error" 1627 }, 1628 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH, 1629 "sense datalen error" 1630 }, 1631 }; 1632 1633 static char *qedi_get_iscsi_error(enum iscsi_error_types err_code) 1634 { 1635 int i; 1636 char *msg = NULL; 1637 1638 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) { 1639 if (qedi_iscsi_error[i].error_code == err_code) { 1640 msg = qedi_iscsi_error[i].err_string; 1641 break; 1642 } 1643 } 1644 return msg; 1645 } 1646 1647 void qedi_process_iscsi_error(struct qedi_endpoint *ep, 1648 struct iscsi_eqe_data *data) 1649 { 1650 struct qedi_conn *qedi_conn; 1651 struct qedi_ctx *qedi; 1652 char warn_notice[] = "iscsi_warning"; 1653 char error_notice[] = "iscsi_error"; 1654 char unknown_msg[] = "Unknown error"; 1655 char *message; 1656 int need_recovery = 0; 1657 u32 err_mask = 0; 1658 char *msg; 1659 1660 if (!ep) 1661 return; 1662 1663 qedi_conn = ep->conn; 1664 if (!qedi_conn) 1665 return; 1666 1667 qedi = ep->qedi; 1668 1669 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n", 1670 data->error_code); 1671 1672 if (err_mask) { 1673 need_recovery = 0; 1674 message = warn_notice; 1675 } else { 1676 need_recovery = 1; 1677 message = error_notice; 1678 } 1679 1680 msg = qedi_get_iscsi_error(data->error_code); 1681 if (!msg) { 1682 need_recovery = 0; 1683 msg = unknown_msg; 1684 } 1685 1686 iscsi_conn_printk(KERN_ALERT, 1687 qedi_conn->cls_conn->dd_data, 1688 "qedi: %s - %s\n", message, msg); 1689 1690 if (need_recovery) 1691 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1692 } 1693 1694 void qedi_process_tcp_error(struct qedi_endpoint *ep, 1695 struct iscsi_eqe_data *data) 1696 { 1697 struct qedi_conn *qedi_conn; 1698 1699 if (!ep) 1700 return; 1701 1702 qedi_conn = ep->conn; 1703 if (!qedi_conn) 1704 return; 1705 1706 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n", 1707 data->error_code); 1708 1709 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1710 } 1711