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_groups = qedi_shost_groups, 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 struct iscsi_session *session = cls_session->dd_data; 334 struct qedi_conn *qedi_conn = session->leadconn->dd_data; 335 336 spin_lock_bh(&session->frwd_lock); 337 set_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags); 338 spin_unlock_bh(&session->frwd_lock); 339 } 340 341 void qedi_mark_device_available(struct iscsi_cls_session *cls_session) 342 { 343 struct iscsi_session *session = cls_session->dd_data; 344 struct qedi_conn *qedi_conn = session->leadconn->dd_data; 345 346 spin_lock_bh(&session->frwd_lock); 347 clear_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags); 348 spin_unlock_bh(&session->frwd_lock); 349 } 350 351 static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi, 352 struct qedi_conn *qedi_conn) 353 { 354 u32 iscsi_cid = qedi_conn->iscsi_conn_id; 355 356 if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) { 357 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 358 "conn bind - entry #%d not free\n", 359 iscsi_cid); 360 return -EBUSY; 361 } 362 363 qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn; 364 return 0; 365 } 366 367 struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid) 368 { 369 if (!qedi->cid_que.conn_cid_tbl) { 370 QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n"); 371 return NULL; 372 373 } else if (iscsi_cid >= qedi->max_active_conns) { 374 QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid); 375 return NULL; 376 } 377 return qedi->cid_que.conn_cid_tbl[iscsi_cid]; 378 } 379 380 static int qedi_conn_bind(struct iscsi_cls_session *cls_session, 381 struct iscsi_cls_conn *cls_conn, 382 u64 transport_fd, int is_leading) 383 { 384 struct iscsi_conn *conn = cls_conn->dd_data; 385 struct qedi_conn *qedi_conn = conn->dd_data; 386 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 387 struct qedi_ctx *qedi = iscsi_host_priv(shost); 388 struct qedi_endpoint *qedi_ep; 389 struct iscsi_endpoint *ep; 390 int rc = 0; 391 392 ep = iscsi_lookup_endpoint(transport_fd); 393 if (!ep) 394 return -EINVAL; 395 396 qedi_ep = ep->dd_data; 397 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) || 398 (qedi_ep->state == EP_STATE_TCP_RST_RCVD)) { 399 rc = -EINVAL; 400 goto put_ep; 401 } 402 403 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) { 404 rc = -EINVAL; 405 goto put_ep; 406 } 407 408 409 qedi_ep->conn = qedi_conn; 410 qedi_conn->ep = qedi_ep; 411 qedi_conn->iscsi_ep = ep; 412 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid; 413 qedi_conn->fw_cid = qedi_ep->fw_cid; 414 qedi_conn->cmd_cleanup_req = 0; 415 qedi_conn->cmd_cleanup_cmpl = 0; 416 417 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn)) { 418 rc = -EINVAL; 419 goto put_ep; 420 } 421 422 423 spin_lock_init(&qedi_conn->tmf_work_lock); 424 INIT_LIST_HEAD(&qedi_conn->tmf_work_list); 425 init_waitqueue_head(&qedi_conn->wait_queue); 426 put_ep: 427 iscsi_put_endpoint(ep); 428 return rc; 429 } 430 431 static int qedi_iscsi_update_conn(struct qedi_ctx *qedi, 432 struct qedi_conn *qedi_conn) 433 { 434 struct qed_iscsi_params_update *conn_info; 435 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn; 436 struct iscsi_conn *conn = cls_conn->dd_data; 437 struct qedi_endpoint *qedi_ep; 438 int rval; 439 440 qedi_ep = qedi_conn->ep; 441 442 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 443 if (!conn_info) { 444 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n"); 445 return -ENOMEM; 446 } 447 448 conn_info->update_flag = 0; 449 450 if (conn->hdrdgst_en) 451 SET_FIELD(conn_info->update_flag, 452 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true); 453 if (conn->datadgst_en) 454 SET_FIELD(conn_info->update_flag, 455 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true); 456 if (conn->session->initial_r2t_en) 457 SET_FIELD(conn_info->update_flag, 458 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T, 459 true); 460 if (conn->session->imm_data_en) 461 SET_FIELD(conn_info->update_flag, 462 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA, 463 true); 464 465 conn_info->max_seq_size = conn->session->max_burst; 466 conn_info->max_recv_pdu_length = conn->max_recv_dlength; 467 conn_info->max_send_pdu_length = conn->max_xmit_dlength; 468 conn_info->first_seq_length = conn->session->first_burst; 469 conn_info->exp_stat_sn = conn->exp_statsn; 470 471 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle, 472 conn_info); 473 if (rval) { 474 rval = -ENXIO; 475 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n"); 476 } 477 478 kfree(conn_info); 479 return rval; 480 } 481 482 static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en) 483 { 484 u16 mss = 0; 485 u16 hdrs = TCP_HDR_LEN; 486 487 if (is_ipv6) 488 hdrs += IPV6_HDR_LEN; 489 else 490 hdrs += IPV4_HDR_LEN; 491 492 mss = pmtu - hdrs; 493 494 if (!mss) 495 mss = DEF_MSS; 496 497 return mss; 498 } 499 500 static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep) 501 { 502 struct qed_iscsi_params_offload *conn_info; 503 struct qedi_ctx *qedi = qedi_ep->qedi; 504 int rval; 505 int i; 506 507 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 508 if (!conn_info) { 509 QEDI_ERR(&qedi->dbg_ctx, 510 "Failed to allocate memory ep=%p\n", qedi_ep); 511 return -ENOMEM; 512 } 513 514 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac); 515 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac); 516 517 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]); 518 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]); 519 520 if (qedi_ep->ip_type == TCP_IPV4) { 521 conn_info->ip_version = 0; 522 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 523 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n", 524 qedi_ep->src_addr, qedi_ep->dst_addr); 525 } else { 526 for (i = 1; i < 4; i++) { 527 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]); 528 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]); 529 } 530 531 conn_info->ip_version = 1; 532 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 533 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n", 534 qedi_ep->src_addr, qedi_ep->dst_addr); 535 } 536 537 conn_info->src.port = qedi_ep->src_port; 538 conn_info->dst.port = qedi_ep->dst_port; 539 540 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE; 541 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma; 542 conn_info->vlan_id = qedi_ep->vlan_id; 543 544 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1); 545 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1); 546 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1); 547 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1); 548 549 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues); 550 551 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT; 552 conn_info->dup_ack_theshold = 3; 553 conn_info->rcv_wnd = 65535; 554 555 conn_info->ss_thresh = 65535; 556 conn_info->srtt = 300; 557 conn_info->rtt_var = 150; 558 conn_info->flow_label = 0; 559 conn_info->ka_timeout = DEF_KA_TIMEOUT; 560 conn_info->ka_interval = DEF_KA_INTERVAL; 561 conn_info->max_rt_time = DEF_MAX_RT_TIME; 562 conn_info->ttl = DEF_TTL; 563 conn_info->tos_or_tc = DEF_TOS; 564 conn_info->remote_port = qedi_ep->dst_port; 565 conn_info->local_port = qedi_ep->src_port; 566 567 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu, 568 (qedi_ep->ip_type == TCP_IPV6), 569 1, (qedi_ep->vlan_id != 0)); 570 571 conn_info->cwnd = DEF_MAX_CWND * conn_info->mss; 572 conn_info->rcv_wnd_scale = 4; 573 conn_info->da_timeout_value = 200; 574 conn_info->ack_frequency = 2; 575 576 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 577 "Default cq index [%d], mss [%d]\n", 578 conn_info->default_cq, conn_info->mss); 579 580 /* Prepare the doorbell parameters */ 581 qedi_ep->db_data.agg_flags = 0; 582 qedi_ep->db_data.params = 0; 583 SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_DEST, DB_DEST_XCM); 584 SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_AGG_CMD, 585 DB_AGG_CMD_MAX); 586 SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_AGG_VAL_SEL, 587 DQ_XCM_ISCSI_SQ_PROD_CMD); 588 SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_BYPASS_EN, 1); 589 590 /* Register doorbell with doorbell recovery mechanism */ 591 rval = qedi_ops->common->db_recovery_add(qedi->cdev, 592 qedi_ep->p_doorbell, 593 &qedi_ep->db_data, 594 DB_REC_WIDTH_32B, 595 DB_REC_KERNEL); 596 if (rval) { 597 kfree(conn_info); 598 return rval; 599 } 600 601 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info); 602 if (rval) { 603 /* delete doorbell from doorbell recovery mechanism */ 604 rval = qedi_ops->common->db_recovery_del(qedi->cdev, 605 qedi_ep->p_doorbell, 606 &qedi_ep->db_data); 607 608 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n", 609 rval, qedi_ep); 610 } 611 612 kfree(conn_info); 613 return rval; 614 } 615 616 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn) 617 { 618 struct iscsi_conn *conn = cls_conn->dd_data; 619 struct qedi_conn *qedi_conn = conn->dd_data; 620 struct qedi_ctx *qedi; 621 int rval; 622 623 qedi = qedi_conn->qedi; 624 625 rval = qedi_iscsi_update_conn(qedi, qedi_conn); 626 if (rval) { 627 iscsi_conn_printk(KERN_ALERT, conn, 628 "conn_start: FW offload conn failed.\n"); 629 rval = -EINVAL; 630 goto start_err; 631 } 632 633 spin_lock(&qedi_conn->tmf_work_lock); 634 qedi_conn->fw_cleanup_works = 0; 635 qedi_conn->ep_disconnect_starting = false; 636 spin_unlock(&qedi_conn->tmf_work_lock); 637 638 qedi_conn->abrt_conn = 0; 639 640 rval = iscsi_conn_start(cls_conn); 641 if (rval) { 642 iscsi_conn_printk(KERN_ALERT, conn, 643 "iscsi_conn_start: FW offload conn failed!!\n"); 644 } 645 646 start_err: 647 return rval; 648 } 649 650 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn) 651 { 652 struct iscsi_conn *conn = cls_conn->dd_data; 653 struct qedi_conn *qedi_conn = conn->dd_data; 654 struct Scsi_Host *shost; 655 struct qedi_ctx *qedi; 656 657 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 658 qedi = iscsi_host_priv(shost); 659 660 qedi_conn_free_login_resources(qedi, qedi_conn); 661 iscsi_conn_teardown(cls_conn); 662 } 663 664 static int qedi_ep_get_param(struct iscsi_endpoint *ep, 665 enum iscsi_param param, char *buf) 666 { 667 struct qedi_endpoint *qedi_ep = ep->dd_data; 668 int len; 669 670 if (!qedi_ep) 671 return -ENOTCONN; 672 673 switch (param) { 674 case ISCSI_PARAM_CONN_PORT: 675 len = sprintf(buf, "%hu\n", qedi_ep->dst_port); 676 break; 677 case ISCSI_PARAM_CONN_ADDRESS: 678 if (qedi_ep->ip_type == TCP_IPV4) 679 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr); 680 else 681 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr); 682 break; 683 default: 684 return -ENOTCONN; 685 } 686 687 return len; 688 } 689 690 static int qedi_host_get_param(struct Scsi_Host *shost, 691 enum iscsi_host_param param, char *buf) 692 { 693 struct qedi_ctx *qedi; 694 int len; 695 696 qedi = iscsi_host_priv(shost); 697 698 switch (param) { 699 case ISCSI_HOST_PARAM_HWADDRESS: 700 len = sysfs_format_mac(buf, qedi->mac, 6); 701 break; 702 case ISCSI_HOST_PARAM_NETDEV_NAME: 703 len = sprintf(buf, "host%d\n", shost->host_no); 704 break; 705 case ISCSI_HOST_PARAM_IPADDRESS: 706 if (qedi->ip_type == TCP_IPV4) 707 len = sprintf(buf, "%pI4\n", qedi->src_ip); 708 else 709 len = sprintf(buf, "%pI6\n", qedi->src_ip); 710 break; 711 default: 712 return iscsi_host_get_param(shost, param, buf); 713 } 714 715 return len; 716 } 717 718 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 719 struct iscsi_stats *stats) 720 { 721 struct iscsi_conn *conn = cls_conn->dd_data; 722 struct qed_iscsi_stats iscsi_stats; 723 struct Scsi_Host *shost; 724 struct qedi_ctx *qedi; 725 726 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 727 qedi = iscsi_host_priv(shost); 728 qedi_ops->get_stats(qedi->cdev, &iscsi_stats); 729 730 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt; 731 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt; 732 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt; 733 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt; 734 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt; 735 736 stats->txdata_octets = conn->txdata_octets; 737 stats->rxdata_octets = conn->rxdata_octets; 738 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 739 stats->dataout_pdus = conn->dataout_pdus_cnt; 740 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 741 stats->datain_pdus = conn->datain_pdus_cnt; 742 stats->r2t_pdus = conn->r2t_pdus_cnt; 743 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 744 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 745 stats->digest_err = 0; 746 stats->timeout_err = 0; 747 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 748 stats->custom[0].value = conn->eh_abort_cnt; 749 stats->custom_length = 1; 750 } 751 752 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn) 753 { 754 struct scsi_sge *bd_tbl; 755 756 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 757 758 bd_tbl->sge_addr.hi = 759 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); 760 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr; 761 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr - 762 qedi_conn->gen_pdu.req_buf; 763 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 764 bd_tbl->sge_addr.hi = 765 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); 766 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr; 767 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN; 768 } 769 770 static int qedi_iscsi_send_generic_request(struct iscsi_task *task) 771 { 772 struct qedi_cmd *cmd = task->dd_data; 773 struct qedi_conn *qedi_conn = cmd->conn; 774 char *buf; 775 int data_len; 776 int rc = 0; 777 778 qedi_iscsi_prep_generic_pdu_bd(qedi_conn); 779 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { 780 case ISCSI_OP_LOGIN: 781 qedi_send_iscsi_login(qedi_conn, task); 782 break; 783 case ISCSI_OP_NOOP_OUT: 784 data_len = qedi_conn->gen_pdu.req_buf_size; 785 buf = qedi_conn->gen_pdu.req_buf; 786 if (data_len) 787 rc = qedi_send_iscsi_nopout(qedi_conn, task, 788 buf, data_len, 1); 789 else 790 rc = qedi_send_iscsi_nopout(qedi_conn, task, 791 NULL, 0, 1); 792 break; 793 case ISCSI_OP_LOGOUT: 794 rc = qedi_send_iscsi_logout(qedi_conn, task); 795 break; 796 case ISCSI_OP_SCSI_TMFUNC: 797 rc = qedi_send_iscsi_tmf(qedi_conn, task); 798 break; 799 case ISCSI_OP_TEXT: 800 rc = qedi_send_iscsi_text(qedi_conn, task); 801 break; 802 default: 803 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 804 "unsupported op 0x%x\n", task->hdr->opcode); 805 } 806 807 return rc; 808 } 809 810 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 811 { 812 struct qedi_conn *qedi_conn = conn->dd_data; 813 struct qedi_cmd *cmd = task->dd_data; 814 815 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); 816 817 qedi_conn->gen_pdu.req_buf_size = task->data_count; 818 819 if (task->data_count) { 820 memcpy(qedi_conn->gen_pdu.req_buf, task->data, 821 task->data_count); 822 qedi_conn->gen_pdu.req_wr_ptr = 823 qedi_conn->gen_pdu.req_buf + task->data_count; 824 } 825 826 cmd->conn = conn->dd_data; 827 return qedi_iscsi_send_generic_request(task); 828 } 829 830 static int qedi_task_xmit(struct iscsi_task *task) 831 { 832 struct iscsi_conn *conn = task->conn; 833 struct qedi_conn *qedi_conn = conn->dd_data; 834 struct qedi_cmd *cmd = task->dd_data; 835 struct scsi_cmnd *sc = task->sc; 836 837 /* Clear now so in cleanup_task we know it didn't make it */ 838 cmd->scsi_cmd = NULL; 839 cmd->task_id = U16_MAX; 840 841 if (test_bit(QEDI_IN_SHUTDOWN, &qedi_conn->qedi->flags)) 842 return -ENODEV; 843 844 if (test_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags)) 845 return -EACCES; 846 847 cmd->state = 0; 848 cmd->task = NULL; 849 cmd->use_slowpath = false; 850 cmd->conn = qedi_conn; 851 cmd->task = task; 852 cmd->io_cmd_in_list = false; 853 INIT_LIST_HEAD(&cmd->io_cmd); 854 855 if (!sc) 856 return qedi_mtask_xmit(conn, task); 857 858 cmd->scsi_cmd = sc; 859 return qedi_iscsi_send_ioreq(task); 860 } 861 862 static struct iscsi_endpoint * 863 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 864 int non_blocking) 865 { 866 struct qedi_ctx *qedi; 867 struct iscsi_endpoint *ep; 868 struct qedi_endpoint *qedi_ep; 869 struct sockaddr_in *addr; 870 struct sockaddr_in6 *addr6; 871 struct iscsi_path path_req; 872 u32 msg_type = ISCSI_KEVENT_IF_DOWN; 873 u32 iscsi_cid = QEDI_CID_RESERVED; 874 u16 len = 0; 875 char *buf = NULL; 876 int ret, tmp; 877 878 if (!shost) { 879 ret = -ENXIO; 880 QEDI_ERR(NULL, "shost is NULL\n"); 881 return ERR_PTR(ret); 882 } 883 884 if (qedi_do_not_recover) { 885 ret = -ENOMEM; 886 return ERR_PTR(ret); 887 } 888 889 qedi = iscsi_host_priv(shost); 890 891 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) || 892 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 893 ret = -ENOMEM; 894 return ERR_PTR(ret); 895 } 896 897 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) { 898 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n"); 899 return ERR_PTR(-ENXIO); 900 } 901 902 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint)); 903 if (!ep) { 904 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n"); 905 ret = -ENOMEM; 906 return ERR_PTR(ret); 907 } 908 qedi_ep = ep->dd_data; 909 memset(qedi_ep, 0, sizeof(struct qedi_endpoint)); 910 qedi_ep->state = EP_STATE_IDLE; 911 qedi_ep->iscsi_cid = (u32)-1; 912 qedi_ep->qedi = qedi; 913 914 if (dst_addr->sa_family == AF_INET) { 915 addr = (struct sockaddr_in *)dst_addr; 916 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr, 917 sizeof(struct in_addr)); 918 qedi_ep->dst_port = ntohs(addr->sin_port); 919 qedi_ep->ip_type = TCP_IPV4; 920 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 921 "dst_addr=%pI4, dst_port=%u\n", 922 qedi_ep->dst_addr, qedi_ep->dst_port); 923 } else if (dst_addr->sa_family == AF_INET6) { 924 addr6 = (struct sockaddr_in6 *)dst_addr; 925 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr, 926 sizeof(struct in6_addr)); 927 qedi_ep->dst_port = ntohs(addr6->sin6_port); 928 qedi_ep->ip_type = TCP_IPV6; 929 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 930 "dst_addr=%pI6, dst_port=%u\n", 931 qedi_ep->dst_addr, qedi_ep->dst_port); 932 } else { 933 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n"); 934 } 935 936 ret = qedi_alloc_sq(qedi, qedi_ep); 937 if (ret) 938 goto ep_conn_exit; 939 940 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle, 941 &qedi_ep->fw_cid, &qedi_ep->p_doorbell); 942 943 if (ret) { 944 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n"); 945 ret = -ENXIO; 946 goto ep_free_sq; 947 } 948 949 iscsi_cid = qedi_ep->handle; 950 qedi_ep->iscsi_cid = iscsi_cid; 951 952 init_waitqueue_head(&qedi_ep->ofld_wait); 953 init_waitqueue_head(&qedi_ep->tcp_ofld_wait); 954 qedi_ep->state = EP_STATE_OFLDCONN_START; 955 qedi->ep_tbl[iscsi_cid] = qedi_ep; 956 957 buf = (char *)&path_req; 958 len = sizeof(path_req); 959 memset(&path_req, 0, len); 960 961 msg_type = ISCSI_KEVENT_PATH_REQ; 962 path_req.handle = (u64)qedi_ep->iscsi_cid; 963 path_req.pmtu = qedi->ll2_mtu; 964 qedi_ep->pmtu = qedi->ll2_mtu; 965 if (qedi_ep->ip_type == TCP_IPV4) { 966 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr, 967 sizeof(struct in_addr)); 968 path_req.ip_addr_len = 4; 969 } else { 970 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr, 971 sizeof(struct in6_addr)); 972 path_req.ip_addr_len = 16; 973 } 974 975 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf, 976 len); 977 if (ret) { 978 QEDI_ERR(&qedi->dbg_ctx, 979 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n", 980 iscsi_cid, ret); 981 goto ep_rel_conn; 982 } 983 984 atomic_inc(&qedi->num_offloads); 985 return ep; 986 987 ep_rel_conn: 988 qedi->ep_tbl[iscsi_cid] = NULL; 989 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 990 if (tmp) 991 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n", 992 tmp); 993 ep_free_sq: 994 qedi_free_sq(qedi, qedi_ep); 995 ep_conn_exit: 996 iscsi_destroy_endpoint(ep); 997 return ERR_PTR(ret); 998 } 999 1000 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 1001 { 1002 struct qedi_endpoint *qedi_ep; 1003 int ret = 0; 1004 1005 if (qedi_do_not_recover) 1006 return 1; 1007 1008 qedi_ep = ep->dd_data; 1009 if (qedi_ep->state == EP_STATE_IDLE || 1010 qedi_ep->state == EP_STATE_OFLDCONN_NONE || 1011 qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 1012 return -1; 1013 1014 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL) 1015 ret = 1; 1016 1017 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait, 1018 QEDI_OFLD_WAIT_STATE(qedi_ep), 1019 msecs_to_jiffies(timeout_ms)); 1020 1021 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 1022 ret = -1; 1023 1024 if (ret > 0) 1025 return 1; 1026 else if (!ret) 1027 return 0; 1028 else 1029 return ret; 1030 } 1031 1032 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn) 1033 { 1034 struct qedi_cmd *cmd, *cmd_tmp; 1035 1036 spin_lock(&qedi_conn->list_lock); 1037 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list, 1038 io_cmd) { 1039 list_del_init(&cmd->io_cmd); 1040 qedi_conn->active_cmd_count--; 1041 } 1042 spin_unlock(&qedi_conn->list_lock); 1043 } 1044 1045 static void qedi_ep_disconnect(struct iscsi_endpoint *ep) 1046 { 1047 struct qedi_endpoint *qedi_ep; 1048 struct qedi_conn *qedi_conn = NULL; 1049 struct qedi_ctx *qedi; 1050 int ret = 0; 1051 int wait_delay; 1052 int abrt_conn = 0; 1053 1054 wait_delay = 60 * HZ + DEF_MAX_RT_TIME; 1055 qedi_ep = ep->dd_data; 1056 qedi = qedi_ep->qedi; 1057 1058 if (qedi_ep->state == EP_STATE_OFLDCONN_START) 1059 goto ep_exit_recover; 1060 1061 if (qedi_ep->state != EP_STATE_OFLDCONN_NONE) 1062 flush_work(&qedi_ep->offload_work); 1063 1064 if (qedi_ep->conn) { 1065 qedi_conn = qedi_ep->conn; 1066 abrt_conn = qedi_conn->abrt_conn; 1067 1068 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1069 "cid=0x%x qedi_ep=%p waiting for %d tmfs\n", 1070 qedi_ep->iscsi_cid, qedi_ep, 1071 qedi_conn->fw_cleanup_works); 1072 1073 spin_lock(&qedi_conn->tmf_work_lock); 1074 qedi_conn->ep_disconnect_starting = true; 1075 while (qedi_conn->fw_cleanup_works > 0) { 1076 spin_unlock(&qedi_conn->tmf_work_lock); 1077 msleep(1000); 1078 spin_lock(&qedi_conn->tmf_work_lock); 1079 } 1080 spin_unlock(&qedi_conn->tmf_work_lock); 1081 1082 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 1083 if (qedi_do_not_recover) { 1084 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1085 "Do not recover cid=0x%x\n", 1086 qedi_ep->iscsi_cid); 1087 goto ep_exit_recover; 1088 } 1089 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1090 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n", 1091 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state); 1092 qedi_cleanup_active_cmd_list(qedi_conn); 1093 goto ep_release_conn; 1094 } 1095 } 1096 1097 if (qedi_do_not_recover) 1098 goto ep_exit_recover; 1099 1100 switch (qedi_ep->state) { 1101 case EP_STATE_OFLDCONN_START: 1102 case EP_STATE_OFLDCONN_NONE: 1103 goto ep_release_conn; 1104 case EP_STATE_OFLDCONN_FAILED: 1105 break; 1106 case EP_STATE_OFLDCONN_COMPL: 1107 if (unlikely(!qedi_conn)) 1108 break; 1109 1110 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1111 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n", 1112 qedi_conn->active_cmd_count, abrt_conn, 1113 qedi_ep->state, 1114 qedi_ep->iscsi_cid, 1115 qedi_ep->conn 1116 ); 1117 1118 if (!qedi_conn->active_cmd_count) 1119 abrt_conn = 0; 1120 else 1121 abrt_conn = 1; 1122 1123 if (abrt_conn) 1124 qedi_clearsq(qedi, qedi_conn, NULL); 1125 break; 1126 default: 1127 break; 1128 } 1129 1130 if (!abrt_conn) 1131 wait_delay += qedi->pf_params.iscsi_pf_params.two_msl_timer; 1132 1133 qedi_ep->state = EP_STATE_DISCONN_START; 1134 1135 if (test_bit(QEDI_IN_SHUTDOWN, &qedi->flags) || 1136 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) 1137 goto ep_release_conn; 1138 1139 /* Delete doorbell from doorbell recovery mechanism */ 1140 ret = qedi_ops->common->db_recovery_del(qedi->cdev, 1141 qedi_ep->p_doorbell, 1142 &qedi_ep->db_data); 1143 1144 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn); 1145 if (ret) { 1146 QEDI_WARN(&qedi->dbg_ctx, 1147 "destroy_conn failed returned %d\n", ret); 1148 } else { 1149 ret = wait_event_interruptible_timeout( 1150 qedi_ep->tcp_ofld_wait, 1151 (qedi_ep->state != 1152 EP_STATE_DISCONN_START), 1153 wait_delay); 1154 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) { 1155 QEDI_WARN(&qedi->dbg_ctx, 1156 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n", 1157 ret, wait_delay, qedi_ep->iscsi_cid); 1158 } 1159 } 1160 1161 ep_release_conn: 1162 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 1163 if (ret) 1164 QEDI_WARN(&qedi->dbg_ctx, 1165 "release_conn returned %d, cid=0x%x\n", 1166 ret, qedi_ep->iscsi_cid); 1167 ep_exit_recover: 1168 qedi_ep->state = EP_STATE_IDLE; 1169 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL; 1170 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL; 1171 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port); 1172 qedi_free_sq(qedi, qedi_ep); 1173 1174 if (qedi_conn) 1175 qedi_conn->ep = NULL; 1176 1177 qedi_ep->conn = NULL; 1178 qedi_ep->qedi = NULL; 1179 atomic_dec(&qedi->num_offloads); 1180 1181 iscsi_destroy_endpoint(ep); 1182 } 1183 1184 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid) 1185 { 1186 struct qed_dev *cdev = qedi->cdev; 1187 struct qedi_uio_dev *udev; 1188 struct qedi_uio_ctrl *uctrl; 1189 struct sk_buff *skb; 1190 u32 len; 1191 int rc = 0; 1192 1193 udev = qedi->udev; 1194 if (!udev) { 1195 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n"); 1196 return -EINVAL; 1197 } 1198 1199 uctrl = (struct qedi_uio_ctrl *)udev->uctrl; 1200 if (!uctrl) { 1201 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n"); 1202 return -EINVAL; 1203 } 1204 1205 len = uctrl->host_tx_pkt_len; 1206 if (!len) { 1207 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len); 1208 return -EINVAL; 1209 } 1210 1211 skb = alloc_skb(len, GFP_ATOMIC); 1212 if (!skb) { 1213 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n"); 1214 return -EINVAL; 1215 } 1216 1217 skb_put(skb, len); 1218 memcpy(skb->data, udev->tx_pkt, len); 1219 skb->ip_summed = CHECKSUM_NONE; 1220 1221 if (vlanid) 1222 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); 1223 1224 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0); 1225 if (rc) { 1226 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n", 1227 rc); 1228 kfree_skb(skb); 1229 } 1230 1231 uctrl->host_tx_pkt_len = 0; 1232 uctrl->hw_tx_cons++; 1233 1234 return rc; 1235 } 1236 1237 static void qedi_offload_work(struct work_struct *work) 1238 { 1239 struct qedi_endpoint *qedi_ep = 1240 container_of(work, struct qedi_endpoint, offload_work); 1241 struct qedi_ctx *qedi; 1242 int wait_delay = 5 * HZ; 1243 int ret; 1244 1245 qedi = qedi_ep->qedi; 1246 1247 ret = qedi_iscsi_offload_conn(qedi_ep); 1248 if (ret) { 1249 QEDI_ERR(&qedi->dbg_ctx, 1250 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n", 1251 qedi_ep->iscsi_cid, qedi_ep, ret); 1252 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1253 return; 1254 } 1255 1256 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait, 1257 (qedi_ep->state == 1258 EP_STATE_OFLDCONN_COMPL), 1259 wait_delay); 1260 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) { 1261 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1262 QEDI_ERR(&qedi->dbg_ctx, 1263 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n", 1264 qedi_ep->iscsi_cid, qedi_ep); 1265 } 1266 } 1267 1268 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data) 1269 { 1270 struct qedi_ctx *qedi; 1271 struct qedi_endpoint *qedi_ep; 1272 int ret = 0; 1273 u32 iscsi_cid; 1274 u16 port_id = 0; 1275 1276 if (!shost) { 1277 ret = -ENXIO; 1278 QEDI_ERR(NULL, "shost is NULL\n"); 1279 return ret; 1280 } 1281 1282 if (strcmp(shost->hostt->proc_name, "qedi")) { 1283 ret = -ENXIO; 1284 QEDI_ERR(NULL, "shost %s is invalid\n", 1285 shost->hostt->proc_name); 1286 return ret; 1287 } 1288 1289 qedi = iscsi_host_priv(shost); 1290 if (path_data->handle == QEDI_PATH_HANDLE) { 1291 ret = qedi_data_avail(qedi, path_data->vlan_id); 1292 goto set_path_exit; 1293 } 1294 1295 iscsi_cid = (u32)path_data->handle; 1296 if (iscsi_cid >= qedi->max_active_conns) { 1297 ret = -EINVAL; 1298 goto set_path_exit; 1299 } 1300 qedi_ep = qedi->ep_tbl[iscsi_cid]; 1301 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1302 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); 1303 if (!qedi_ep) { 1304 ret = -EINVAL; 1305 goto set_path_exit; 1306 } 1307 1308 if (!is_valid_ether_addr(&path_data->mac_addr[0])) { 1309 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n"); 1310 qedi_ep->state = EP_STATE_OFLDCONN_NONE; 1311 ret = -EIO; 1312 goto set_path_exit; 1313 } 1314 1315 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]); 1316 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]); 1317 1318 qedi_ep->vlan_id = path_data->vlan_id; 1319 if (path_data->pmtu < DEF_PATH_MTU) { 1320 qedi_ep->pmtu = qedi->ll2_mtu; 1321 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1322 "MTU cannot be %u, using default MTU %u\n", 1323 path_data->pmtu, qedi_ep->pmtu); 1324 } 1325 1326 if (path_data->pmtu != qedi->ll2_mtu) { 1327 if (path_data->pmtu > JUMBO_MTU) { 1328 ret = -EINVAL; 1329 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu); 1330 goto set_path_exit; 1331 } 1332 1333 qedi_reset_host_mtu(qedi, path_data->pmtu); 1334 qedi_ep->pmtu = qedi->ll2_mtu; 1335 } 1336 1337 port_id = qedi_ep->src_port; 1338 if (port_id >= QEDI_LOCAL_PORT_MIN && 1339 port_id < QEDI_LOCAL_PORT_MAX) { 1340 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id)) 1341 port_id = 0; 1342 } else { 1343 port_id = 0; 1344 } 1345 1346 if (!port_id) { 1347 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl); 1348 if (port_id == QEDI_LOCAL_PORT_INVALID) { 1349 QEDI_ERR(&qedi->dbg_ctx, 1350 "Failed to allocate port id for iscsi_cid=0x%x\n", 1351 iscsi_cid); 1352 ret = -ENOMEM; 1353 goto set_path_exit; 1354 } 1355 } 1356 1357 qedi_ep->src_port = port_id; 1358 1359 if (qedi_ep->ip_type == TCP_IPV4) { 1360 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr, 1361 sizeof(struct in_addr)); 1362 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr, 1363 sizeof(struct in_addr)); 1364 qedi->ip_type = TCP_IPV4; 1365 1366 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1367 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n", 1368 qedi_ep->src_addr, qedi_ep->src_port, 1369 qedi_ep->dst_addr, qedi_ep->dst_port); 1370 } else { 1371 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr, 1372 sizeof(struct in6_addr)); 1373 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr, 1374 sizeof(struct in6_addr)); 1375 qedi->ip_type = TCP_IPV6; 1376 1377 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1378 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n", 1379 qedi_ep->src_addr, qedi_ep->src_port, 1380 qedi_ep->dst_addr, qedi_ep->dst_port); 1381 } 1382 1383 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work); 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