1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * QLogic iSCSI Offload Driver 4 * Copyright (c) 2016 Cavium Inc. 5 */ 6 7 #include <linux/blkdev.h> 8 #include <linux/etherdevice.h> 9 #include <linux/if_ether.h> 10 #include <linux/if_vlan.h> 11 #include <scsi/scsi_tcq.h> 12 13 #include "qedi.h" 14 #include "qedi_iscsi.h" 15 #include "qedi_gbl.h" 16 17 int qedi_recover_all_conns(struct qedi_ctx *qedi) 18 { 19 struct qedi_conn *qedi_conn; 20 int i; 21 22 for (i = 0; i < qedi->max_active_conns; i++) { 23 qedi_conn = qedi_get_conn_from_id(qedi, i); 24 if (!qedi_conn) 25 continue; 26 27 qedi_start_conn_recovery(qedi, qedi_conn); 28 } 29 30 return SUCCESS; 31 } 32 33 static int qedi_eh_host_reset(struct scsi_cmnd *cmd) 34 { 35 struct Scsi_Host *shost = cmd->device->host; 36 struct qedi_ctx *qedi; 37 38 qedi = iscsi_host_priv(shost); 39 40 return qedi_recover_all_conns(qedi); 41 } 42 43 struct scsi_host_template qedi_host_template = { 44 .module = THIS_MODULE, 45 .name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver", 46 .proc_name = QEDI_MODULE_NAME, 47 .queuecommand = iscsi_queuecommand, 48 .eh_timed_out = iscsi_eh_cmd_timed_out, 49 .eh_abort_handler = iscsi_eh_abort, 50 .eh_device_reset_handler = iscsi_eh_device_reset, 51 .eh_target_reset_handler = iscsi_eh_recover_target, 52 .eh_host_reset_handler = qedi_eh_host_reset, 53 .target_alloc = iscsi_target_alloc, 54 .change_queue_depth = scsi_change_queue_depth, 55 .can_queue = QEDI_MAX_ISCSI_TASK, 56 .this_id = -1, 57 .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD, 58 .max_sectors = 0xffff, 59 .dma_boundary = QEDI_HW_DMA_BOUNDARY, 60 .cmd_per_lun = 128, 61 .shost_attrs = qedi_shost_attrs, 62 }; 63 64 static void qedi_conn_free_login_resources(struct qedi_ctx *qedi, 65 struct qedi_conn *qedi_conn) 66 { 67 if (qedi_conn->gen_pdu.resp_bd_tbl) { 68 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 69 qedi_conn->gen_pdu.resp_bd_tbl, 70 qedi_conn->gen_pdu.resp_bd_dma); 71 qedi_conn->gen_pdu.resp_bd_tbl = NULL; 72 } 73 74 if (qedi_conn->gen_pdu.req_bd_tbl) { 75 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 76 qedi_conn->gen_pdu.req_bd_tbl, 77 qedi_conn->gen_pdu.req_bd_dma); 78 qedi_conn->gen_pdu.req_bd_tbl = NULL; 79 } 80 81 if (qedi_conn->gen_pdu.resp_buf) { 82 dma_free_coherent(&qedi->pdev->dev, 83 ISCSI_DEF_MAX_RECV_SEG_LEN, 84 qedi_conn->gen_pdu.resp_buf, 85 qedi_conn->gen_pdu.resp_dma_addr); 86 qedi_conn->gen_pdu.resp_buf = NULL; 87 } 88 89 if (qedi_conn->gen_pdu.req_buf) { 90 dma_free_coherent(&qedi->pdev->dev, 91 ISCSI_DEF_MAX_RECV_SEG_LEN, 92 qedi_conn->gen_pdu.req_buf, 93 qedi_conn->gen_pdu.req_dma_addr); 94 qedi_conn->gen_pdu.req_buf = NULL; 95 } 96 } 97 98 static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi, 99 struct qedi_conn *qedi_conn) 100 { 101 qedi_conn->gen_pdu.req_buf = 102 dma_alloc_coherent(&qedi->pdev->dev, 103 ISCSI_DEF_MAX_RECV_SEG_LEN, 104 &qedi_conn->gen_pdu.req_dma_addr, 105 GFP_KERNEL); 106 if (!qedi_conn->gen_pdu.req_buf) 107 goto login_req_buf_failure; 108 109 qedi_conn->gen_pdu.req_buf_size = 0; 110 qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf; 111 112 qedi_conn->gen_pdu.resp_buf = 113 dma_alloc_coherent(&qedi->pdev->dev, 114 ISCSI_DEF_MAX_RECV_SEG_LEN, 115 &qedi_conn->gen_pdu.resp_dma_addr, 116 GFP_KERNEL); 117 if (!qedi_conn->gen_pdu.resp_buf) 118 goto login_resp_buf_failure; 119 120 qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; 121 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf; 122 123 qedi_conn->gen_pdu.req_bd_tbl = 124 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 125 &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL); 126 if (!qedi_conn->gen_pdu.req_bd_tbl) 127 goto login_req_bd_tbl_failure; 128 129 qedi_conn->gen_pdu.resp_bd_tbl = 130 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 131 &qedi_conn->gen_pdu.resp_bd_dma, 132 GFP_KERNEL); 133 if (!qedi_conn->gen_pdu.resp_bd_tbl) 134 goto login_resp_bd_tbl_failure; 135 136 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS, 137 "Allocation successful, cid=0x%x\n", 138 qedi_conn->iscsi_conn_id); 139 return 0; 140 141 login_resp_bd_tbl_failure: 142 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 143 qedi_conn->gen_pdu.req_bd_tbl, 144 qedi_conn->gen_pdu.req_bd_dma); 145 qedi_conn->gen_pdu.req_bd_tbl = NULL; 146 147 login_req_bd_tbl_failure: 148 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 149 qedi_conn->gen_pdu.resp_buf, 150 qedi_conn->gen_pdu.resp_dma_addr); 151 qedi_conn->gen_pdu.resp_buf = NULL; 152 login_resp_buf_failure: 153 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 154 qedi_conn->gen_pdu.req_buf, 155 qedi_conn->gen_pdu.req_dma_addr); 156 qedi_conn->gen_pdu.req_buf = NULL; 157 login_req_buf_failure: 158 iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data, 159 "login resource alloc failed!!\n"); 160 return -ENOMEM; 161 } 162 163 static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi, 164 struct iscsi_session *session) 165 { 166 int i; 167 168 for (i = 0; i < session->cmds_max; i++) { 169 struct iscsi_task *task = session->cmds[i]; 170 struct qedi_cmd *cmd = task->dd_data; 171 172 if (cmd->io_tbl.sge_tbl) 173 dma_free_coherent(&qedi->pdev->dev, 174 QEDI_ISCSI_MAX_BDS_PER_CMD * 175 sizeof(struct scsi_sge), 176 cmd->io_tbl.sge_tbl, 177 cmd->io_tbl.sge_tbl_dma); 178 179 if (cmd->sense_buffer) 180 dma_free_coherent(&qedi->pdev->dev, 181 SCSI_SENSE_BUFFERSIZE, 182 cmd->sense_buffer, 183 cmd->sense_buffer_dma); 184 } 185 } 186 187 static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session, 188 struct qedi_cmd *cmd) 189 { 190 struct qedi_io_bdt *io = &cmd->io_tbl; 191 struct scsi_sge *sge; 192 193 io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev, 194 QEDI_ISCSI_MAX_BDS_PER_CMD * 195 sizeof(*sge), 196 &io->sge_tbl_dma, GFP_KERNEL); 197 if (!io->sge_tbl) { 198 iscsi_session_printk(KERN_ERR, session, 199 "Could not allocate BD table.\n"); 200 return -ENOMEM; 201 } 202 203 io->sge_valid = 0; 204 return 0; 205 } 206 207 static int qedi_setup_cmd_pool(struct qedi_ctx *qedi, 208 struct iscsi_session *session) 209 { 210 int i; 211 212 for (i = 0; i < session->cmds_max; i++) { 213 struct iscsi_task *task = session->cmds[i]; 214 struct qedi_cmd *cmd = task->dd_data; 215 216 task->hdr = &cmd->hdr; 217 task->hdr_max = sizeof(struct iscsi_hdr); 218 219 if (qedi_alloc_sget(qedi, session, cmd)) 220 goto free_sgets; 221 222 cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev, 223 SCSI_SENSE_BUFFERSIZE, 224 &cmd->sense_buffer_dma, 225 GFP_KERNEL); 226 if (!cmd->sense_buffer) 227 goto free_sgets; 228 } 229 230 return 0; 231 232 free_sgets: 233 qedi_destroy_cmd_pool(qedi, session); 234 return -ENOMEM; 235 } 236 237 static struct iscsi_cls_session * 238 qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max, 239 u16 qdepth, uint32_t initial_cmdsn) 240 { 241 struct Scsi_Host *shost; 242 struct iscsi_cls_session *cls_session; 243 struct qedi_ctx *qedi; 244 struct qedi_endpoint *qedi_ep; 245 246 if (!ep) 247 return NULL; 248 249 qedi_ep = ep->dd_data; 250 shost = qedi_ep->qedi->shost; 251 qedi = iscsi_host_priv(shost); 252 253 if (cmds_max > qedi->max_sqes) 254 cmds_max = qedi->max_sqes; 255 else if (cmds_max < QEDI_SQ_WQES_MIN) 256 cmds_max = QEDI_SQ_WQES_MIN; 257 258 cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost, 259 cmds_max, 0, sizeof(struct qedi_cmd), 260 initial_cmdsn, ISCSI_MAX_TARGET); 261 if (!cls_session) { 262 QEDI_ERR(&qedi->dbg_ctx, 263 "Failed to setup session for ep=%p\n", qedi_ep); 264 return NULL; 265 } 266 267 if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) { 268 QEDI_ERR(&qedi->dbg_ctx, 269 "Failed to setup cmd pool for ep=%p\n", qedi_ep); 270 goto session_teardown; 271 } 272 273 return cls_session; 274 275 session_teardown: 276 iscsi_session_teardown(cls_session); 277 return NULL; 278 } 279 280 static void qedi_session_destroy(struct iscsi_cls_session *cls_session) 281 { 282 struct iscsi_session *session = cls_session->dd_data; 283 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 284 struct qedi_ctx *qedi = iscsi_host_priv(shost); 285 286 qedi_destroy_cmd_pool(qedi, session); 287 iscsi_session_teardown(cls_session); 288 } 289 290 static struct iscsi_cls_conn * 291 qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) 292 { 293 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 294 struct qedi_ctx *qedi = iscsi_host_priv(shost); 295 struct iscsi_cls_conn *cls_conn; 296 struct qedi_conn *qedi_conn; 297 struct iscsi_conn *conn; 298 299 cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn), 300 cid); 301 if (!cls_conn) { 302 QEDI_ERR(&qedi->dbg_ctx, 303 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n", 304 cid, cls_session); 305 return NULL; 306 } 307 308 conn = cls_conn->dd_data; 309 qedi_conn = conn->dd_data; 310 qedi_conn->cls_conn = cls_conn; 311 qedi_conn->qedi = qedi; 312 qedi_conn->ep = NULL; 313 qedi_conn->active_cmd_count = 0; 314 INIT_LIST_HEAD(&qedi_conn->active_cmd_list); 315 spin_lock_init(&qedi_conn->list_lock); 316 317 if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) { 318 iscsi_conn_printk(KERN_ALERT, conn, 319 "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n", 320 cid, cls_session); 321 goto free_conn; 322 } 323 324 return cls_conn; 325 326 free_conn: 327 iscsi_conn_teardown(cls_conn); 328 return NULL; 329 } 330 331 void qedi_mark_device_missing(struct iscsi_cls_session *cls_session) 332 { 333 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 qedi_ctx *qedi = qedi_ep->qedi; 503 struct qed_iscsi_params_offload *conn_info; 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 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info); 581 if (rval) 582 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n", 583 rval, qedi_ep); 584 585 kfree(conn_info); 586 return rval; 587 } 588 589 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn) 590 { 591 struct iscsi_conn *conn = cls_conn->dd_data; 592 struct qedi_conn *qedi_conn = conn->dd_data; 593 struct qedi_ctx *qedi; 594 int rval; 595 596 qedi = qedi_conn->qedi; 597 598 rval = qedi_iscsi_update_conn(qedi, qedi_conn); 599 if (rval) { 600 iscsi_conn_printk(KERN_ALERT, conn, 601 "conn_start: FW offload conn failed.\n"); 602 rval = -EINVAL; 603 goto start_err; 604 } 605 606 spin_lock(&qedi_conn->tmf_work_lock); 607 qedi_conn->fw_cleanup_works = 0; 608 qedi_conn->ep_disconnect_starting = false; 609 spin_unlock(&qedi_conn->tmf_work_lock); 610 611 qedi_conn->abrt_conn = 0; 612 613 rval = iscsi_conn_start(cls_conn); 614 if (rval) { 615 iscsi_conn_printk(KERN_ALERT, conn, 616 "iscsi_conn_start: FW offload conn failed!!\n"); 617 } 618 619 start_err: 620 return rval; 621 } 622 623 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn) 624 { 625 struct iscsi_conn *conn = cls_conn->dd_data; 626 struct qedi_conn *qedi_conn = conn->dd_data; 627 struct Scsi_Host *shost; 628 struct qedi_ctx *qedi; 629 630 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 631 qedi = iscsi_host_priv(shost); 632 633 qedi_conn_free_login_resources(qedi, qedi_conn); 634 iscsi_conn_teardown(cls_conn); 635 } 636 637 static int qedi_ep_get_param(struct iscsi_endpoint *ep, 638 enum iscsi_param param, char *buf) 639 { 640 struct qedi_endpoint *qedi_ep = ep->dd_data; 641 int len; 642 643 if (!qedi_ep) 644 return -ENOTCONN; 645 646 switch (param) { 647 case ISCSI_PARAM_CONN_PORT: 648 len = sprintf(buf, "%hu\n", qedi_ep->dst_port); 649 break; 650 case ISCSI_PARAM_CONN_ADDRESS: 651 if (qedi_ep->ip_type == TCP_IPV4) 652 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr); 653 else 654 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr); 655 break; 656 default: 657 return -ENOTCONN; 658 } 659 660 return len; 661 } 662 663 static int qedi_host_get_param(struct Scsi_Host *shost, 664 enum iscsi_host_param param, char *buf) 665 { 666 struct qedi_ctx *qedi; 667 int len; 668 669 qedi = iscsi_host_priv(shost); 670 671 switch (param) { 672 case ISCSI_HOST_PARAM_HWADDRESS: 673 len = sysfs_format_mac(buf, qedi->mac, 6); 674 break; 675 case ISCSI_HOST_PARAM_NETDEV_NAME: 676 len = sprintf(buf, "host%d\n", shost->host_no); 677 break; 678 case ISCSI_HOST_PARAM_IPADDRESS: 679 if (qedi->ip_type == TCP_IPV4) 680 len = sprintf(buf, "%pI4\n", qedi->src_ip); 681 else 682 len = sprintf(buf, "%pI6\n", qedi->src_ip); 683 break; 684 default: 685 return iscsi_host_get_param(shost, param, buf); 686 } 687 688 return len; 689 } 690 691 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 692 struct iscsi_stats *stats) 693 { 694 struct iscsi_conn *conn = cls_conn->dd_data; 695 struct qed_iscsi_stats iscsi_stats; 696 struct Scsi_Host *shost; 697 struct qedi_ctx *qedi; 698 699 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 700 qedi = iscsi_host_priv(shost); 701 qedi_ops->get_stats(qedi->cdev, &iscsi_stats); 702 703 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt; 704 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt; 705 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt; 706 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt; 707 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt; 708 709 stats->txdata_octets = conn->txdata_octets; 710 stats->rxdata_octets = conn->rxdata_octets; 711 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 712 stats->dataout_pdus = conn->dataout_pdus_cnt; 713 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 714 stats->datain_pdus = conn->datain_pdus_cnt; 715 stats->r2t_pdus = conn->r2t_pdus_cnt; 716 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 717 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 718 stats->digest_err = 0; 719 stats->timeout_err = 0; 720 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 721 stats->custom[0].value = conn->eh_abort_cnt; 722 stats->custom_length = 1; 723 } 724 725 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn) 726 { 727 struct scsi_sge *bd_tbl; 728 729 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 730 731 bd_tbl->sge_addr.hi = 732 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); 733 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr; 734 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr - 735 qedi_conn->gen_pdu.req_buf; 736 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 737 bd_tbl->sge_addr.hi = 738 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); 739 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr; 740 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN; 741 } 742 743 static int qedi_iscsi_send_generic_request(struct iscsi_task *task) 744 { 745 struct qedi_cmd *cmd = task->dd_data; 746 struct qedi_conn *qedi_conn = cmd->conn; 747 char *buf; 748 int data_len; 749 int rc = 0; 750 751 qedi_iscsi_prep_generic_pdu_bd(qedi_conn); 752 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { 753 case ISCSI_OP_LOGIN: 754 qedi_send_iscsi_login(qedi_conn, task); 755 break; 756 case ISCSI_OP_NOOP_OUT: 757 data_len = qedi_conn->gen_pdu.req_buf_size; 758 buf = qedi_conn->gen_pdu.req_buf; 759 if (data_len) 760 rc = qedi_send_iscsi_nopout(qedi_conn, task, 761 buf, data_len, 1); 762 else 763 rc = qedi_send_iscsi_nopout(qedi_conn, task, 764 NULL, 0, 1); 765 break; 766 case ISCSI_OP_LOGOUT: 767 rc = qedi_send_iscsi_logout(qedi_conn, task); 768 break; 769 case ISCSI_OP_SCSI_TMFUNC: 770 rc = qedi_send_iscsi_tmf(qedi_conn, task); 771 break; 772 case ISCSI_OP_TEXT: 773 rc = qedi_send_iscsi_text(qedi_conn, task); 774 break; 775 default: 776 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 777 "unsupported op 0x%x\n", task->hdr->opcode); 778 } 779 780 return rc; 781 } 782 783 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 784 { 785 struct qedi_conn *qedi_conn = conn->dd_data; 786 struct qedi_cmd *cmd = task->dd_data; 787 788 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); 789 790 qedi_conn->gen_pdu.req_buf_size = task->data_count; 791 792 if (task->data_count) { 793 memcpy(qedi_conn->gen_pdu.req_buf, task->data, 794 task->data_count); 795 qedi_conn->gen_pdu.req_wr_ptr = 796 qedi_conn->gen_pdu.req_buf + task->data_count; 797 } 798 799 cmd->conn = conn->dd_data; 800 return qedi_iscsi_send_generic_request(task); 801 } 802 803 static int qedi_task_xmit(struct iscsi_task *task) 804 { 805 struct iscsi_conn *conn = task->conn; 806 struct qedi_conn *qedi_conn = conn->dd_data; 807 struct qedi_cmd *cmd = task->dd_data; 808 struct scsi_cmnd *sc = task->sc; 809 810 /* Clear now so in cleanup_task we know it didn't make it */ 811 cmd->scsi_cmd = NULL; 812 cmd->task_id = U16_MAX; 813 814 if (test_bit(QEDI_IN_SHUTDOWN, &qedi_conn->qedi->flags)) 815 return -ENODEV; 816 817 if (test_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags)) 818 return -EACCES; 819 820 cmd->state = 0; 821 cmd->task = NULL; 822 cmd->use_slowpath = false; 823 cmd->conn = qedi_conn; 824 cmd->task = task; 825 cmd->io_cmd_in_list = false; 826 INIT_LIST_HEAD(&cmd->io_cmd); 827 828 if (!sc) 829 return qedi_mtask_xmit(conn, task); 830 831 cmd->scsi_cmd = sc; 832 return qedi_iscsi_send_ioreq(task); 833 } 834 835 static struct iscsi_endpoint * 836 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 837 int non_blocking) 838 { 839 struct qedi_ctx *qedi; 840 struct iscsi_endpoint *ep; 841 struct qedi_endpoint *qedi_ep; 842 struct sockaddr_in *addr; 843 struct sockaddr_in6 *addr6; 844 struct iscsi_path path_req; 845 u32 msg_type = ISCSI_KEVENT_IF_DOWN; 846 u32 iscsi_cid = QEDI_CID_RESERVED; 847 u16 len = 0; 848 char *buf = NULL; 849 int ret, tmp; 850 851 if (!shost) { 852 ret = -ENXIO; 853 QEDI_ERR(NULL, "shost is NULL\n"); 854 return ERR_PTR(ret); 855 } 856 857 if (qedi_do_not_recover) { 858 ret = -ENOMEM; 859 return ERR_PTR(ret); 860 } 861 862 qedi = iscsi_host_priv(shost); 863 864 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) || 865 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 866 ret = -ENOMEM; 867 return ERR_PTR(ret); 868 } 869 870 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) { 871 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n"); 872 return ERR_PTR(-ENXIO); 873 } 874 875 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint)); 876 if (!ep) { 877 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n"); 878 ret = -ENOMEM; 879 return ERR_PTR(ret); 880 } 881 qedi_ep = ep->dd_data; 882 memset(qedi_ep, 0, sizeof(struct qedi_endpoint)); 883 qedi_ep->state = EP_STATE_IDLE; 884 qedi_ep->iscsi_cid = (u32)-1; 885 qedi_ep->qedi = qedi; 886 887 if (dst_addr->sa_family == AF_INET) { 888 addr = (struct sockaddr_in *)dst_addr; 889 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr, 890 sizeof(struct in_addr)); 891 qedi_ep->dst_port = ntohs(addr->sin_port); 892 qedi_ep->ip_type = TCP_IPV4; 893 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 894 "dst_addr=%pI4, dst_port=%u\n", 895 qedi_ep->dst_addr, qedi_ep->dst_port); 896 } else if (dst_addr->sa_family == AF_INET6) { 897 addr6 = (struct sockaddr_in6 *)dst_addr; 898 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr, 899 sizeof(struct in6_addr)); 900 qedi_ep->dst_port = ntohs(addr6->sin6_port); 901 qedi_ep->ip_type = TCP_IPV6; 902 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 903 "dst_addr=%pI6, dst_port=%u\n", 904 qedi_ep->dst_addr, qedi_ep->dst_port); 905 } else { 906 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n"); 907 } 908 909 ret = qedi_alloc_sq(qedi, qedi_ep); 910 if (ret) 911 goto ep_conn_exit; 912 913 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle, 914 &qedi_ep->fw_cid, &qedi_ep->p_doorbell); 915 916 if (ret) { 917 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n"); 918 ret = -ENXIO; 919 goto ep_free_sq; 920 } 921 922 iscsi_cid = qedi_ep->handle; 923 qedi_ep->iscsi_cid = iscsi_cid; 924 925 init_waitqueue_head(&qedi_ep->ofld_wait); 926 init_waitqueue_head(&qedi_ep->tcp_ofld_wait); 927 qedi_ep->state = EP_STATE_OFLDCONN_START; 928 qedi->ep_tbl[iscsi_cid] = qedi_ep; 929 930 buf = (char *)&path_req; 931 len = sizeof(path_req); 932 memset(&path_req, 0, len); 933 934 msg_type = ISCSI_KEVENT_PATH_REQ; 935 path_req.handle = (u64)qedi_ep->iscsi_cid; 936 path_req.pmtu = qedi->ll2_mtu; 937 qedi_ep->pmtu = qedi->ll2_mtu; 938 if (qedi_ep->ip_type == TCP_IPV4) { 939 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr, 940 sizeof(struct in_addr)); 941 path_req.ip_addr_len = 4; 942 } else { 943 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr, 944 sizeof(struct in6_addr)); 945 path_req.ip_addr_len = 16; 946 } 947 948 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf, 949 len); 950 if (ret) { 951 QEDI_ERR(&qedi->dbg_ctx, 952 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n", 953 iscsi_cid, ret); 954 goto ep_rel_conn; 955 } 956 957 atomic_inc(&qedi->num_offloads); 958 return ep; 959 960 ep_rel_conn: 961 qedi->ep_tbl[iscsi_cid] = NULL; 962 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 963 if (tmp) 964 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n", 965 tmp); 966 ep_free_sq: 967 qedi_free_sq(qedi, qedi_ep); 968 ep_conn_exit: 969 iscsi_destroy_endpoint(ep); 970 return ERR_PTR(ret); 971 } 972 973 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 974 { 975 struct qedi_endpoint *qedi_ep; 976 int ret = 0; 977 978 if (qedi_do_not_recover) 979 return 1; 980 981 qedi_ep = ep->dd_data; 982 if (qedi_ep->state == EP_STATE_IDLE || 983 qedi_ep->state == EP_STATE_OFLDCONN_NONE || 984 qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 985 return -1; 986 987 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL) 988 ret = 1; 989 990 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait, 991 QEDI_OFLD_WAIT_STATE(qedi_ep), 992 msecs_to_jiffies(timeout_ms)); 993 994 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 995 ret = -1; 996 997 if (ret > 0) 998 return 1; 999 else if (!ret) 1000 return 0; 1001 else 1002 return ret; 1003 } 1004 1005 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn) 1006 { 1007 struct qedi_cmd *cmd, *cmd_tmp; 1008 1009 spin_lock(&qedi_conn->list_lock); 1010 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list, 1011 io_cmd) { 1012 list_del_init(&cmd->io_cmd); 1013 qedi_conn->active_cmd_count--; 1014 } 1015 spin_unlock(&qedi_conn->list_lock); 1016 } 1017 1018 static void qedi_ep_disconnect(struct iscsi_endpoint *ep) 1019 { 1020 struct qedi_endpoint *qedi_ep; 1021 struct qedi_conn *qedi_conn = NULL; 1022 struct qedi_ctx *qedi; 1023 int ret = 0; 1024 int wait_delay; 1025 int abrt_conn = 0; 1026 1027 wait_delay = 60 * HZ + DEF_MAX_RT_TIME; 1028 qedi_ep = ep->dd_data; 1029 qedi = qedi_ep->qedi; 1030 1031 if (qedi_ep->state == EP_STATE_OFLDCONN_START) 1032 goto ep_exit_recover; 1033 1034 if (qedi_ep->state != EP_STATE_OFLDCONN_NONE) 1035 flush_work(&qedi_ep->offload_work); 1036 1037 if (qedi_ep->conn) { 1038 qedi_conn = qedi_ep->conn; 1039 abrt_conn = qedi_conn->abrt_conn; 1040 1041 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1042 "cid=0x%x qedi_ep=%p waiting for %d tmfs\n", 1043 qedi_ep->iscsi_cid, qedi_ep, 1044 qedi_conn->fw_cleanup_works); 1045 1046 spin_lock(&qedi_conn->tmf_work_lock); 1047 qedi_conn->ep_disconnect_starting = true; 1048 while (qedi_conn->fw_cleanup_works > 0) { 1049 spin_unlock(&qedi_conn->tmf_work_lock); 1050 msleep(1000); 1051 spin_lock(&qedi_conn->tmf_work_lock); 1052 } 1053 spin_unlock(&qedi_conn->tmf_work_lock); 1054 1055 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 1056 if (qedi_do_not_recover) { 1057 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1058 "Do not recover cid=0x%x\n", 1059 qedi_ep->iscsi_cid); 1060 goto ep_exit_recover; 1061 } 1062 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1063 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n", 1064 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state); 1065 qedi_cleanup_active_cmd_list(qedi_conn); 1066 goto ep_release_conn; 1067 } 1068 } 1069 1070 if (qedi_do_not_recover) 1071 goto ep_exit_recover; 1072 1073 switch (qedi_ep->state) { 1074 case EP_STATE_OFLDCONN_START: 1075 case EP_STATE_OFLDCONN_NONE: 1076 goto ep_release_conn; 1077 case EP_STATE_OFLDCONN_FAILED: 1078 break; 1079 case EP_STATE_OFLDCONN_COMPL: 1080 if (unlikely(!qedi_conn)) 1081 break; 1082 1083 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1084 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n", 1085 qedi_conn->active_cmd_count, abrt_conn, 1086 qedi_ep->state, 1087 qedi_ep->iscsi_cid, 1088 qedi_ep->conn 1089 ); 1090 1091 if (!qedi_conn->active_cmd_count) 1092 abrt_conn = 0; 1093 else 1094 abrt_conn = 1; 1095 1096 if (abrt_conn) 1097 qedi_clearsq(qedi, qedi_conn, NULL); 1098 break; 1099 default: 1100 break; 1101 } 1102 1103 if (!abrt_conn) 1104 wait_delay += qedi->pf_params.iscsi_pf_params.two_msl_timer; 1105 1106 qedi_ep->state = EP_STATE_DISCONN_START; 1107 1108 if (test_bit(QEDI_IN_SHUTDOWN, &qedi->flags) || 1109 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) 1110 goto ep_release_conn; 1111 1112 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn); 1113 if (ret) { 1114 QEDI_WARN(&qedi->dbg_ctx, 1115 "destroy_conn failed returned %d\n", ret); 1116 } else { 1117 ret = wait_event_interruptible_timeout( 1118 qedi_ep->tcp_ofld_wait, 1119 (qedi_ep->state != 1120 EP_STATE_DISCONN_START), 1121 wait_delay); 1122 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) { 1123 QEDI_WARN(&qedi->dbg_ctx, 1124 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n", 1125 ret, wait_delay, qedi_ep->iscsi_cid); 1126 } 1127 } 1128 1129 ep_release_conn: 1130 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 1131 if (ret) 1132 QEDI_WARN(&qedi->dbg_ctx, 1133 "release_conn returned %d, cid=0x%x\n", 1134 ret, qedi_ep->iscsi_cid); 1135 ep_exit_recover: 1136 qedi_ep->state = EP_STATE_IDLE; 1137 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL; 1138 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL; 1139 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port); 1140 qedi_free_sq(qedi, qedi_ep); 1141 1142 if (qedi_conn) 1143 qedi_conn->ep = NULL; 1144 1145 qedi_ep->conn = NULL; 1146 qedi_ep->qedi = NULL; 1147 atomic_dec(&qedi->num_offloads); 1148 1149 iscsi_destroy_endpoint(ep); 1150 } 1151 1152 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid) 1153 { 1154 struct qed_dev *cdev = qedi->cdev; 1155 struct qedi_uio_dev *udev; 1156 struct qedi_uio_ctrl *uctrl; 1157 struct sk_buff *skb; 1158 u32 len; 1159 int rc = 0; 1160 1161 udev = qedi->udev; 1162 if (!udev) { 1163 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n"); 1164 return -EINVAL; 1165 } 1166 1167 uctrl = (struct qedi_uio_ctrl *)udev->uctrl; 1168 if (!uctrl) { 1169 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n"); 1170 return -EINVAL; 1171 } 1172 1173 len = uctrl->host_tx_pkt_len; 1174 if (!len) { 1175 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len); 1176 return -EINVAL; 1177 } 1178 1179 skb = alloc_skb(len, GFP_ATOMIC); 1180 if (!skb) { 1181 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n"); 1182 return -EINVAL; 1183 } 1184 1185 skb_put(skb, len); 1186 memcpy(skb->data, udev->tx_pkt, len); 1187 skb->ip_summed = CHECKSUM_NONE; 1188 1189 if (vlanid) 1190 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); 1191 1192 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0); 1193 if (rc) { 1194 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n", 1195 rc); 1196 kfree_skb(skb); 1197 } 1198 1199 uctrl->host_tx_pkt_len = 0; 1200 uctrl->hw_tx_cons++; 1201 1202 return rc; 1203 } 1204 1205 static void qedi_offload_work(struct work_struct *work) 1206 { 1207 struct qedi_endpoint *qedi_ep = 1208 container_of(work, struct qedi_endpoint, offload_work); 1209 struct qedi_ctx *qedi; 1210 int wait_delay = 5 * HZ; 1211 int ret; 1212 1213 qedi = qedi_ep->qedi; 1214 1215 ret = qedi_iscsi_offload_conn(qedi_ep); 1216 if (ret) { 1217 QEDI_ERR(&qedi->dbg_ctx, 1218 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n", 1219 qedi_ep->iscsi_cid, qedi_ep, ret); 1220 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1221 return; 1222 } 1223 1224 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait, 1225 (qedi_ep->state == 1226 EP_STATE_OFLDCONN_COMPL), 1227 wait_delay); 1228 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) { 1229 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1230 QEDI_ERR(&qedi->dbg_ctx, 1231 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n", 1232 qedi_ep->iscsi_cid, qedi_ep); 1233 } 1234 } 1235 1236 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data) 1237 { 1238 struct qedi_ctx *qedi; 1239 struct qedi_endpoint *qedi_ep; 1240 int ret = 0; 1241 u32 iscsi_cid; 1242 u16 port_id = 0; 1243 1244 if (!shost) { 1245 ret = -ENXIO; 1246 QEDI_ERR(NULL, "shost is NULL\n"); 1247 return ret; 1248 } 1249 1250 if (strcmp(shost->hostt->proc_name, "qedi")) { 1251 ret = -ENXIO; 1252 QEDI_ERR(NULL, "shost %s is invalid\n", 1253 shost->hostt->proc_name); 1254 return ret; 1255 } 1256 1257 qedi = iscsi_host_priv(shost); 1258 if (path_data->handle == QEDI_PATH_HANDLE) { 1259 ret = qedi_data_avail(qedi, path_data->vlan_id); 1260 goto set_path_exit; 1261 } 1262 1263 iscsi_cid = (u32)path_data->handle; 1264 if (iscsi_cid >= qedi->max_active_conns) { 1265 ret = -EINVAL; 1266 goto set_path_exit; 1267 } 1268 qedi_ep = qedi->ep_tbl[iscsi_cid]; 1269 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1270 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); 1271 if (!qedi_ep) { 1272 ret = -EINVAL; 1273 goto set_path_exit; 1274 } 1275 1276 if (!is_valid_ether_addr(&path_data->mac_addr[0])) { 1277 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n"); 1278 qedi_ep->state = EP_STATE_OFLDCONN_NONE; 1279 ret = -EIO; 1280 goto set_path_exit; 1281 } 1282 1283 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]); 1284 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]); 1285 1286 qedi_ep->vlan_id = path_data->vlan_id; 1287 if (path_data->pmtu < DEF_PATH_MTU) { 1288 qedi_ep->pmtu = qedi->ll2_mtu; 1289 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1290 "MTU cannot be %u, using default MTU %u\n", 1291 path_data->pmtu, qedi_ep->pmtu); 1292 } 1293 1294 if (path_data->pmtu != qedi->ll2_mtu) { 1295 if (path_data->pmtu > JUMBO_MTU) { 1296 ret = -EINVAL; 1297 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu); 1298 goto set_path_exit; 1299 } 1300 1301 qedi_reset_host_mtu(qedi, path_data->pmtu); 1302 qedi_ep->pmtu = qedi->ll2_mtu; 1303 } 1304 1305 port_id = qedi_ep->src_port; 1306 if (port_id >= QEDI_LOCAL_PORT_MIN && 1307 port_id < QEDI_LOCAL_PORT_MAX) { 1308 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id)) 1309 port_id = 0; 1310 } else { 1311 port_id = 0; 1312 } 1313 1314 if (!port_id) { 1315 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl); 1316 if (port_id == QEDI_LOCAL_PORT_INVALID) { 1317 QEDI_ERR(&qedi->dbg_ctx, 1318 "Failed to allocate port id for iscsi_cid=0x%x\n", 1319 iscsi_cid); 1320 ret = -ENOMEM; 1321 goto set_path_exit; 1322 } 1323 } 1324 1325 qedi_ep->src_port = port_id; 1326 1327 if (qedi_ep->ip_type == TCP_IPV4) { 1328 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr, 1329 sizeof(struct in_addr)); 1330 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr, 1331 sizeof(struct in_addr)); 1332 qedi->ip_type = TCP_IPV4; 1333 1334 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1335 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n", 1336 qedi_ep->src_addr, qedi_ep->src_port, 1337 qedi_ep->dst_addr, qedi_ep->dst_port); 1338 } else { 1339 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr, 1340 sizeof(struct in6_addr)); 1341 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr, 1342 sizeof(struct in6_addr)); 1343 qedi->ip_type = TCP_IPV6; 1344 1345 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1346 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n", 1347 qedi_ep->src_addr, qedi_ep->src_port, 1348 qedi_ep->dst_addr, qedi_ep->dst_port); 1349 } 1350 1351 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work); 1352 queue_work(qedi->offload_thread, &qedi_ep->offload_work); 1353 1354 ret = 0; 1355 1356 set_path_exit: 1357 return ret; 1358 } 1359 1360 static umode_t qedi_attr_is_visible(int param_type, int param) 1361 { 1362 switch (param_type) { 1363 case ISCSI_HOST_PARAM: 1364 switch (param) { 1365 case ISCSI_HOST_PARAM_NETDEV_NAME: 1366 case ISCSI_HOST_PARAM_HWADDRESS: 1367 case ISCSI_HOST_PARAM_IPADDRESS: 1368 return 0444; 1369 default: 1370 return 0; 1371 } 1372 case ISCSI_PARAM: 1373 switch (param) { 1374 case ISCSI_PARAM_MAX_RECV_DLENGTH: 1375 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 1376 case ISCSI_PARAM_HDRDGST_EN: 1377 case ISCSI_PARAM_DATADGST_EN: 1378 case ISCSI_PARAM_CONN_ADDRESS: 1379 case ISCSI_PARAM_CONN_PORT: 1380 case ISCSI_PARAM_EXP_STATSN: 1381 case ISCSI_PARAM_PERSISTENT_ADDRESS: 1382 case ISCSI_PARAM_PERSISTENT_PORT: 1383 case ISCSI_PARAM_PING_TMO: 1384 case ISCSI_PARAM_RECV_TMO: 1385 case ISCSI_PARAM_INITIAL_R2T_EN: 1386 case ISCSI_PARAM_MAX_R2T: 1387 case ISCSI_PARAM_IMM_DATA_EN: 1388 case ISCSI_PARAM_FIRST_BURST: 1389 case ISCSI_PARAM_MAX_BURST: 1390 case ISCSI_PARAM_PDU_INORDER_EN: 1391 case ISCSI_PARAM_DATASEQ_INORDER_EN: 1392 case ISCSI_PARAM_ERL: 1393 case ISCSI_PARAM_TARGET_NAME: 1394 case ISCSI_PARAM_TPGT: 1395 case ISCSI_PARAM_USERNAME: 1396 case ISCSI_PARAM_PASSWORD: 1397 case ISCSI_PARAM_USERNAME_IN: 1398 case ISCSI_PARAM_PASSWORD_IN: 1399 case ISCSI_PARAM_FAST_ABORT: 1400 case ISCSI_PARAM_ABORT_TMO: 1401 case ISCSI_PARAM_LU_RESET_TMO: 1402 case ISCSI_PARAM_TGT_RESET_TMO: 1403 case ISCSI_PARAM_IFACE_NAME: 1404 case ISCSI_PARAM_INITIATOR_NAME: 1405 case ISCSI_PARAM_BOOT_ROOT: 1406 case ISCSI_PARAM_BOOT_NIC: 1407 case ISCSI_PARAM_BOOT_TARGET: 1408 return 0444; 1409 default: 1410 return 0; 1411 } 1412 } 1413 1414 return 0; 1415 } 1416 1417 static void qedi_cleanup_task(struct iscsi_task *task) 1418 { 1419 struct qedi_cmd *cmd; 1420 1421 if (task->state == ISCSI_TASK_PENDING) { 1422 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n", 1423 refcount_read(&task->refcount)); 1424 return; 1425 } 1426 1427 if (task->sc) 1428 qedi_iscsi_unmap_sg_list(task->dd_data); 1429 1430 cmd = task->dd_data; 1431 if (cmd->task_id != U16_MAX) 1432 qedi_clear_task_idx(iscsi_host_priv(task->conn->session->host), 1433 cmd->task_id); 1434 1435 cmd->task_id = U16_MAX; 1436 cmd->scsi_cmd = NULL; 1437 } 1438 1439 struct iscsi_transport qedi_iscsi_transport = { 1440 .owner = THIS_MODULE, 1441 .name = QEDI_MODULE_NAME, 1442 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST | 1443 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO, 1444 .create_session = qedi_session_create, 1445 .destroy_session = qedi_session_destroy, 1446 .create_conn = qedi_conn_create, 1447 .bind_conn = qedi_conn_bind, 1448 .unbind_conn = iscsi_conn_unbind, 1449 .start_conn = qedi_conn_start, 1450 .stop_conn = iscsi_conn_stop, 1451 .destroy_conn = qedi_conn_destroy, 1452 .set_param = iscsi_set_param, 1453 .get_ep_param = qedi_ep_get_param, 1454 .get_conn_param = iscsi_conn_get_param, 1455 .get_session_param = iscsi_session_get_param, 1456 .get_host_param = qedi_host_get_param, 1457 .send_pdu = iscsi_conn_send_pdu, 1458 .get_stats = qedi_conn_get_stats, 1459 .xmit_task = qedi_task_xmit, 1460 .cleanup_task = qedi_cleanup_task, 1461 .session_recovery_timedout = iscsi_session_recovery_timedout, 1462 .ep_connect = qedi_ep_connect, 1463 .ep_poll = qedi_ep_poll, 1464 .ep_disconnect = qedi_ep_disconnect, 1465 .set_path = qedi_set_path, 1466 .attr_is_visible = qedi_attr_is_visible, 1467 }; 1468 1469 void qedi_start_conn_recovery(struct qedi_ctx *qedi, 1470 struct qedi_conn *qedi_conn) 1471 { 1472 struct iscsi_cls_session *cls_sess; 1473 struct iscsi_cls_conn *cls_conn; 1474 struct iscsi_conn *conn; 1475 1476 cls_conn = qedi_conn->cls_conn; 1477 conn = cls_conn->dd_data; 1478 cls_sess = iscsi_conn_to_session(cls_conn); 1479 1480 if (iscsi_is_session_online(cls_sess)) { 1481 qedi_conn->abrt_conn = 1; 1482 QEDI_ERR(&qedi->dbg_ctx, 1483 "Failing connection, state=0x%x, cid=0x%x\n", 1484 conn->session->state, qedi_conn->iscsi_conn_id); 1485 iscsi_conn_failure(qedi_conn->cls_conn->dd_data, 1486 ISCSI_ERR_CONN_FAILED); 1487 } 1488 } 1489 1490 static const struct { 1491 enum iscsi_error_types error_code; 1492 char *err_string; 1493 } qedi_iscsi_error[] = { 1494 { ISCSI_STATUS_NONE, 1495 "tcp_error none" 1496 }, 1497 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH, 1498 "task cid mismatch" 1499 }, 1500 { ISCSI_CONN_ERROR_TASK_NOT_VALID, 1501 "invalid task" 1502 }, 1503 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL, 1504 "rq ring full" 1505 }, 1506 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL, 1507 "cmdq ring full" 1508 }, 1509 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED, 1510 "sge caching failed" 1511 }, 1512 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR, 1513 "hdr digest error" 1514 }, 1515 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR, 1516 "local cmpl error" 1517 }, 1518 { ISCSI_CONN_ERROR_DATA_OVERRUN, 1519 "invalid task" 1520 }, 1521 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR, 1522 "out of sge error" 1523 }, 1524 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR, 1525 "tcp ip fragment error" 1526 }, 1527 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN, 1528 "AHS len protocol error" 1529 }, 1530 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE, 1531 "itt out of range error" 1532 }, 1533 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE, 1534 "data seg more than pdu size" 1535 }, 1536 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE, 1537 "invalid opcode" 1538 }, 1539 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE, 1540 "invalid opcode before update" 1541 }, 1542 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL, 1543 "unexpected opcode" 1544 }, 1545 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA, 1546 "r2t carries no data" 1547 }, 1548 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN, 1549 "data sn error" 1550 }, 1551 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT, 1552 "data TTT error" 1553 }, 1554 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT, 1555 "r2t TTT error" 1556 }, 1557 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET, 1558 "buffer offset error" 1559 }, 1560 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO, 1561 "buffer offset ooo" 1562 }, 1563 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN, 1564 "data seg len 0" 1565 }, 1566 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0, 1567 "data xer len error" 1568 }, 1569 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1, 1570 "data xer len1 error" 1571 }, 1572 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2, 1573 "data xer len2 error" 1574 }, 1575 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN, 1576 "protocol lun error" 1577 }, 1578 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO, 1579 "f bit zero error" 1580 }, 1581 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN, 1582 "exp stat sn error" 1583 }, 1584 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO, 1585 "dsl not zero error" 1586 }, 1587 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL, 1588 "invalid dsl" 1589 }, 1590 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG, 1591 "data seg len too big" 1592 }, 1593 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT, 1594 "outstanding r2t count error" 1595 }, 1596 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH, 1597 "sense datalen error" 1598 }, 1599 }; 1600 1601 static char *qedi_get_iscsi_error(enum iscsi_error_types err_code) 1602 { 1603 int i; 1604 char *msg = NULL; 1605 1606 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) { 1607 if (qedi_iscsi_error[i].error_code == err_code) { 1608 msg = qedi_iscsi_error[i].err_string; 1609 break; 1610 } 1611 } 1612 return msg; 1613 } 1614 1615 void qedi_process_iscsi_error(struct qedi_endpoint *ep, 1616 struct iscsi_eqe_data *data) 1617 { 1618 struct qedi_conn *qedi_conn; 1619 struct qedi_ctx *qedi; 1620 char warn_notice[] = "iscsi_warning"; 1621 char error_notice[] = "iscsi_error"; 1622 char unknown_msg[] = "Unknown error"; 1623 char *message; 1624 int need_recovery = 0; 1625 u32 err_mask = 0; 1626 char *msg; 1627 1628 if (!ep) 1629 return; 1630 1631 qedi_conn = ep->conn; 1632 if (!qedi_conn) 1633 return; 1634 1635 qedi = ep->qedi; 1636 1637 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n", 1638 data->error_code); 1639 1640 if (err_mask) { 1641 need_recovery = 0; 1642 message = warn_notice; 1643 } else { 1644 need_recovery = 1; 1645 message = error_notice; 1646 } 1647 1648 msg = qedi_get_iscsi_error(data->error_code); 1649 if (!msg) { 1650 need_recovery = 0; 1651 msg = unknown_msg; 1652 } 1653 1654 iscsi_conn_printk(KERN_ALERT, 1655 qedi_conn->cls_conn->dd_data, 1656 "qedi: %s - %s\n", message, msg); 1657 1658 if (need_recovery) 1659 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1660 } 1661 1662 void qedi_clear_session_ctx(struct iscsi_cls_session *cls_sess) 1663 { 1664 struct iscsi_session *session = cls_sess->dd_data; 1665 struct iscsi_conn *conn = session->leadconn; 1666 struct qedi_conn *qedi_conn = conn->dd_data; 1667 1668 if (iscsi_is_session_online(cls_sess)) { 1669 if (conn) 1670 iscsi_suspend_queue(conn); 1671 qedi_ep_disconnect(qedi_conn->iscsi_ep); 1672 } 1673 1674 qedi_conn_destroy(qedi_conn->cls_conn); 1675 1676 qedi_session_destroy(cls_sess); 1677 } 1678 1679 void qedi_process_tcp_error(struct qedi_endpoint *ep, 1680 struct iscsi_eqe_data *data) 1681 { 1682 struct qedi_conn *qedi_conn; 1683 1684 if (!ep) 1685 return; 1686 1687 qedi_conn = ep->conn; 1688 if (!qedi_conn) 1689 return; 1690 1691 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n", 1692 data->error_code); 1693 1694 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1695 } 1696