1 /* 2 * QLogic iSCSI Offload Driver 3 * Copyright (c) 2016 Cavium Inc. 4 * 5 * This software is available under the terms of the GNU General Public License 6 * (GPL) Version 2, available from the file COPYING in the main directory of 7 * this source tree. 8 */ 9 10 #include <linux/blkdev.h> 11 #include <linux/etherdevice.h> 12 #include <linux/if_ether.h> 13 #include <linux/if_vlan.h> 14 #include <scsi/scsi_tcq.h> 15 16 #include "qedi.h" 17 #include "qedi_iscsi.h" 18 #include "qedi_gbl.h" 19 20 int qedi_recover_all_conns(struct qedi_ctx *qedi) 21 { 22 struct qedi_conn *qedi_conn; 23 int i; 24 25 for (i = 0; i < qedi->max_active_conns; i++) { 26 qedi_conn = qedi_get_conn_from_id(qedi, i); 27 if (!qedi_conn) 28 continue; 29 30 qedi_start_conn_recovery(qedi, qedi_conn); 31 } 32 33 return SUCCESS; 34 } 35 36 static int qedi_eh_host_reset(struct scsi_cmnd *cmd) 37 { 38 struct Scsi_Host *shost = cmd->device->host; 39 struct qedi_ctx *qedi; 40 41 qedi = iscsi_host_priv(shost); 42 43 return qedi_recover_all_conns(qedi); 44 } 45 46 struct scsi_host_template qedi_host_template = { 47 .module = THIS_MODULE, 48 .name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver", 49 .proc_name = QEDI_MODULE_NAME, 50 .queuecommand = iscsi_queuecommand, 51 .eh_timed_out = iscsi_eh_cmd_timed_out, 52 .eh_abort_handler = iscsi_eh_abort, 53 .eh_device_reset_handler = iscsi_eh_device_reset, 54 .eh_target_reset_handler = iscsi_eh_recover_target, 55 .eh_host_reset_handler = qedi_eh_host_reset, 56 .target_alloc = iscsi_target_alloc, 57 .change_queue_depth = scsi_change_queue_depth, 58 .can_queue = QEDI_MAX_ISCSI_TASK, 59 .this_id = -1, 60 .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD, 61 .max_sectors = 0xffff, 62 .dma_boundary = QEDI_HW_DMA_BOUNDARY, 63 .cmd_per_lun = 128, 64 .use_clustering = ENABLE_CLUSTERING, 65 .shost_attrs = qedi_shost_attrs, 66 }; 67 68 static void qedi_conn_free_login_resources(struct qedi_ctx *qedi, 69 struct qedi_conn *qedi_conn) 70 { 71 if (qedi_conn->gen_pdu.resp_bd_tbl) { 72 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 73 qedi_conn->gen_pdu.resp_bd_tbl, 74 qedi_conn->gen_pdu.resp_bd_dma); 75 qedi_conn->gen_pdu.resp_bd_tbl = NULL; 76 } 77 78 if (qedi_conn->gen_pdu.req_bd_tbl) { 79 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 80 qedi_conn->gen_pdu.req_bd_tbl, 81 qedi_conn->gen_pdu.req_bd_dma); 82 qedi_conn->gen_pdu.req_bd_tbl = NULL; 83 } 84 85 if (qedi_conn->gen_pdu.resp_buf) { 86 dma_free_coherent(&qedi->pdev->dev, 87 ISCSI_DEF_MAX_RECV_SEG_LEN, 88 qedi_conn->gen_pdu.resp_buf, 89 qedi_conn->gen_pdu.resp_dma_addr); 90 qedi_conn->gen_pdu.resp_buf = NULL; 91 } 92 93 if (qedi_conn->gen_pdu.req_buf) { 94 dma_free_coherent(&qedi->pdev->dev, 95 ISCSI_DEF_MAX_RECV_SEG_LEN, 96 qedi_conn->gen_pdu.req_buf, 97 qedi_conn->gen_pdu.req_dma_addr); 98 qedi_conn->gen_pdu.req_buf = NULL; 99 } 100 } 101 102 static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi, 103 struct qedi_conn *qedi_conn) 104 { 105 qedi_conn->gen_pdu.req_buf = 106 dma_alloc_coherent(&qedi->pdev->dev, 107 ISCSI_DEF_MAX_RECV_SEG_LEN, 108 &qedi_conn->gen_pdu.req_dma_addr, 109 GFP_KERNEL); 110 if (!qedi_conn->gen_pdu.req_buf) 111 goto login_req_buf_failure; 112 113 qedi_conn->gen_pdu.req_buf_size = 0; 114 qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf; 115 116 qedi_conn->gen_pdu.resp_buf = 117 dma_alloc_coherent(&qedi->pdev->dev, 118 ISCSI_DEF_MAX_RECV_SEG_LEN, 119 &qedi_conn->gen_pdu.resp_dma_addr, 120 GFP_KERNEL); 121 if (!qedi_conn->gen_pdu.resp_buf) 122 goto login_resp_buf_failure; 123 124 qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; 125 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf; 126 127 qedi_conn->gen_pdu.req_bd_tbl = 128 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 129 &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL); 130 if (!qedi_conn->gen_pdu.req_bd_tbl) 131 goto login_req_bd_tbl_failure; 132 133 qedi_conn->gen_pdu.resp_bd_tbl = 134 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 135 &qedi_conn->gen_pdu.resp_bd_dma, 136 GFP_KERNEL); 137 if (!qedi_conn->gen_pdu.resp_bd_tbl) 138 goto login_resp_bd_tbl_failure; 139 140 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS, 141 "Allocation successful, cid=0x%x\n", 142 qedi_conn->iscsi_conn_id); 143 return 0; 144 145 login_resp_bd_tbl_failure: 146 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 147 qedi_conn->gen_pdu.req_bd_tbl, 148 qedi_conn->gen_pdu.req_bd_dma); 149 qedi_conn->gen_pdu.req_bd_tbl = NULL; 150 151 login_req_bd_tbl_failure: 152 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 153 qedi_conn->gen_pdu.resp_buf, 154 qedi_conn->gen_pdu.resp_dma_addr); 155 qedi_conn->gen_pdu.resp_buf = NULL; 156 login_resp_buf_failure: 157 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 158 qedi_conn->gen_pdu.req_buf, 159 qedi_conn->gen_pdu.req_dma_addr); 160 qedi_conn->gen_pdu.req_buf = NULL; 161 login_req_buf_failure: 162 iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data, 163 "login resource alloc failed!!\n"); 164 return -ENOMEM; 165 } 166 167 static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi, 168 struct iscsi_session *session) 169 { 170 int i; 171 172 for (i = 0; i < session->cmds_max; i++) { 173 struct iscsi_task *task = session->cmds[i]; 174 struct qedi_cmd *cmd = task->dd_data; 175 176 if (cmd->io_tbl.sge_tbl) 177 dma_free_coherent(&qedi->pdev->dev, 178 QEDI_ISCSI_MAX_BDS_PER_CMD * 179 sizeof(struct scsi_sge), 180 cmd->io_tbl.sge_tbl, 181 cmd->io_tbl.sge_tbl_dma); 182 183 if (cmd->sense_buffer) 184 dma_free_coherent(&qedi->pdev->dev, 185 SCSI_SENSE_BUFFERSIZE, 186 cmd->sense_buffer, 187 cmd->sense_buffer_dma); 188 } 189 } 190 191 static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session, 192 struct qedi_cmd *cmd) 193 { 194 struct qedi_io_bdt *io = &cmd->io_tbl; 195 struct scsi_sge *sge; 196 197 io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev, 198 QEDI_ISCSI_MAX_BDS_PER_CMD * 199 sizeof(*sge), 200 &io->sge_tbl_dma, GFP_KERNEL); 201 if (!io->sge_tbl) { 202 iscsi_session_printk(KERN_ERR, session, 203 "Could not allocate BD table.\n"); 204 return -ENOMEM; 205 } 206 207 io->sge_valid = 0; 208 return 0; 209 } 210 211 static int qedi_setup_cmd_pool(struct qedi_ctx *qedi, 212 struct iscsi_session *session) 213 { 214 int i; 215 216 for (i = 0; i < session->cmds_max; i++) { 217 struct iscsi_task *task = session->cmds[i]; 218 struct qedi_cmd *cmd = task->dd_data; 219 220 task->hdr = &cmd->hdr; 221 task->hdr_max = sizeof(struct iscsi_hdr); 222 223 if (qedi_alloc_sget(qedi, session, cmd)) 224 goto free_sgets; 225 226 cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev, 227 SCSI_SENSE_BUFFERSIZE, 228 &cmd->sense_buffer_dma, 229 GFP_KERNEL); 230 if (!cmd->sense_buffer) 231 goto free_sgets; 232 } 233 234 return 0; 235 236 free_sgets: 237 qedi_destroy_cmd_pool(qedi, session); 238 return -ENOMEM; 239 } 240 241 static struct iscsi_cls_session * 242 qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max, 243 u16 qdepth, uint32_t initial_cmdsn) 244 { 245 struct Scsi_Host *shost; 246 struct iscsi_cls_session *cls_session; 247 struct qedi_ctx *qedi; 248 struct qedi_endpoint *qedi_ep; 249 250 if (!ep) 251 return NULL; 252 253 qedi_ep = ep->dd_data; 254 shost = qedi_ep->qedi->shost; 255 qedi = iscsi_host_priv(shost); 256 257 if (cmds_max > qedi->max_sqes) 258 cmds_max = qedi->max_sqes; 259 else if (cmds_max < QEDI_SQ_WQES_MIN) 260 cmds_max = QEDI_SQ_WQES_MIN; 261 262 cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost, 263 cmds_max, 0, sizeof(struct qedi_cmd), 264 initial_cmdsn, ISCSI_MAX_TARGET); 265 if (!cls_session) { 266 QEDI_ERR(&qedi->dbg_ctx, 267 "Failed to setup session for ep=%p\n", qedi_ep); 268 return NULL; 269 } 270 271 if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) { 272 QEDI_ERR(&qedi->dbg_ctx, 273 "Failed to setup cmd pool for ep=%p\n", qedi_ep); 274 goto session_teardown; 275 } 276 277 return cls_session; 278 279 session_teardown: 280 iscsi_session_teardown(cls_session); 281 return NULL; 282 } 283 284 static void qedi_session_destroy(struct iscsi_cls_session *cls_session) 285 { 286 struct iscsi_session *session = cls_session->dd_data; 287 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 288 struct qedi_ctx *qedi = iscsi_host_priv(shost); 289 290 qedi_destroy_cmd_pool(qedi, session); 291 iscsi_session_teardown(cls_session); 292 } 293 294 static struct iscsi_cls_conn * 295 qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) 296 { 297 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 298 struct qedi_ctx *qedi = iscsi_host_priv(shost); 299 struct iscsi_cls_conn *cls_conn; 300 struct qedi_conn *qedi_conn; 301 struct iscsi_conn *conn; 302 303 cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn), 304 cid); 305 if (!cls_conn) { 306 QEDI_ERR(&qedi->dbg_ctx, 307 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n", 308 cid, cls_session); 309 return NULL; 310 } 311 312 conn = cls_conn->dd_data; 313 qedi_conn = conn->dd_data; 314 qedi_conn->cls_conn = cls_conn; 315 qedi_conn->qedi = qedi; 316 qedi_conn->ep = NULL; 317 qedi_conn->active_cmd_count = 0; 318 INIT_LIST_HEAD(&qedi_conn->active_cmd_list); 319 spin_lock_init(&qedi_conn->list_lock); 320 321 if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) { 322 iscsi_conn_printk(KERN_ALERT, conn, 323 "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n", 324 cid, cls_session); 325 goto free_conn; 326 } 327 328 return cls_conn; 329 330 free_conn: 331 iscsi_conn_teardown(cls_conn); 332 return NULL; 333 } 334 335 void qedi_mark_device_missing(struct iscsi_cls_session *cls_session) 336 { 337 iscsi_block_session(cls_session); 338 } 339 340 void qedi_mark_device_available(struct iscsi_cls_session *cls_session) 341 { 342 iscsi_unblock_session(cls_session); 343 } 344 345 static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi, 346 struct qedi_conn *qedi_conn) 347 { 348 u32 iscsi_cid = qedi_conn->iscsi_conn_id; 349 350 if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) { 351 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 352 "conn bind - entry #%d not free\n", 353 iscsi_cid); 354 return -EBUSY; 355 } 356 357 qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn; 358 return 0; 359 } 360 361 struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid) 362 { 363 if (!qedi->cid_que.conn_cid_tbl) { 364 QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n"); 365 return NULL; 366 367 } else if (iscsi_cid >= qedi->max_active_conns) { 368 QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid); 369 return NULL; 370 } 371 return qedi->cid_que.conn_cid_tbl[iscsi_cid]; 372 } 373 374 static int qedi_conn_bind(struct iscsi_cls_session *cls_session, 375 struct iscsi_cls_conn *cls_conn, 376 u64 transport_fd, int is_leading) 377 { 378 struct iscsi_conn *conn = cls_conn->dd_data; 379 struct qedi_conn *qedi_conn = conn->dd_data; 380 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 381 struct qedi_ctx *qedi = iscsi_host_priv(shost); 382 struct qedi_endpoint *qedi_ep; 383 struct iscsi_endpoint *ep; 384 385 ep = iscsi_lookup_endpoint(transport_fd); 386 if (!ep) 387 return -EINVAL; 388 389 qedi_ep = ep->dd_data; 390 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) || 391 (qedi_ep->state == EP_STATE_TCP_RST_RCVD)) 392 return -EINVAL; 393 394 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) 395 return -EINVAL; 396 397 qedi_ep->conn = qedi_conn; 398 qedi_conn->ep = qedi_ep; 399 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid; 400 qedi_conn->fw_cid = qedi_ep->fw_cid; 401 qedi_conn->cmd_cleanup_req = 0; 402 qedi_conn->cmd_cleanup_cmpl = 0; 403 404 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn)) 405 return -EINVAL; 406 407 spin_lock_init(&qedi_conn->tmf_work_lock); 408 INIT_LIST_HEAD(&qedi_conn->tmf_work_list); 409 init_waitqueue_head(&qedi_conn->wait_queue); 410 return 0; 411 } 412 413 static int qedi_iscsi_update_conn(struct qedi_ctx *qedi, 414 struct qedi_conn *qedi_conn) 415 { 416 struct qed_iscsi_params_update *conn_info; 417 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn; 418 struct iscsi_conn *conn = cls_conn->dd_data; 419 struct qedi_endpoint *qedi_ep; 420 int rval; 421 422 qedi_ep = qedi_conn->ep; 423 424 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 425 if (!conn_info) { 426 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n"); 427 return -ENOMEM; 428 } 429 430 conn_info->update_flag = 0; 431 432 if (conn->hdrdgst_en) 433 SET_FIELD(conn_info->update_flag, 434 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true); 435 if (conn->datadgst_en) 436 SET_FIELD(conn_info->update_flag, 437 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true); 438 if (conn->session->initial_r2t_en) 439 SET_FIELD(conn_info->update_flag, 440 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T, 441 true); 442 if (conn->session->imm_data_en) 443 SET_FIELD(conn_info->update_flag, 444 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA, 445 true); 446 447 conn_info->max_seq_size = conn->session->max_burst; 448 conn_info->max_recv_pdu_length = conn->max_recv_dlength; 449 conn_info->max_send_pdu_length = conn->max_xmit_dlength; 450 conn_info->first_seq_length = conn->session->first_burst; 451 conn_info->exp_stat_sn = conn->exp_statsn; 452 453 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle, 454 conn_info); 455 if (rval) { 456 rval = -ENXIO; 457 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n"); 458 } 459 460 kfree(conn_info); 461 return rval; 462 } 463 464 static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en) 465 { 466 u16 mss = 0; 467 u16 hdrs = TCP_HDR_LEN; 468 469 if (is_ipv6) 470 hdrs += IPV6_HDR_LEN; 471 else 472 hdrs += IPV4_HDR_LEN; 473 474 if (vlan_en) 475 hdrs += VLAN_LEN; 476 477 mss = pmtu - hdrs; 478 479 if (tcp_ts_en) 480 mss -= TCP_OPTION_LEN; 481 482 if (!mss) 483 mss = DEF_MSS; 484 485 return mss; 486 } 487 488 static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep) 489 { 490 struct qedi_ctx *qedi = qedi_ep->qedi; 491 struct qed_iscsi_params_offload *conn_info; 492 int rval; 493 int i; 494 495 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 496 if (!conn_info) { 497 QEDI_ERR(&qedi->dbg_ctx, 498 "Failed to allocate memory ep=%p\n", qedi_ep); 499 return -ENOMEM; 500 } 501 502 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac); 503 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac); 504 505 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]); 506 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]); 507 508 if (qedi_ep->ip_type == TCP_IPV4) { 509 conn_info->ip_version = 0; 510 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 511 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n", 512 qedi_ep->src_addr, qedi_ep->dst_addr); 513 } else { 514 for (i = 1; i < 4; i++) { 515 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]); 516 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]); 517 } 518 519 conn_info->ip_version = 1; 520 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 521 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n", 522 qedi_ep->src_addr, qedi_ep->dst_addr); 523 } 524 525 conn_info->src.port = qedi_ep->src_port; 526 conn_info->dst.port = qedi_ep->dst_port; 527 528 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE; 529 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma; 530 conn_info->vlan_id = qedi_ep->vlan_id; 531 532 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1); 533 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1); 534 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1); 535 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1); 536 537 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues); 538 539 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT; 540 conn_info->dup_ack_theshold = 3; 541 conn_info->rcv_wnd = 65535; 542 conn_info->cwnd = DEF_MAX_CWND; 543 544 conn_info->ss_thresh = 65535; 545 conn_info->srtt = 300; 546 conn_info->rtt_var = 150; 547 conn_info->flow_label = 0; 548 conn_info->ka_timeout = DEF_KA_TIMEOUT; 549 conn_info->ka_interval = DEF_KA_INTERVAL; 550 conn_info->max_rt_time = DEF_MAX_RT_TIME; 551 conn_info->ttl = DEF_TTL; 552 conn_info->tos_or_tc = DEF_TOS; 553 conn_info->remote_port = qedi_ep->dst_port; 554 conn_info->local_port = qedi_ep->src_port; 555 556 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu, 557 (qedi_ep->ip_type == TCP_IPV6), 558 1, (qedi_ep->vlan_id != 0)); 559 560 conn_info->rcv_wnd_scale = 4; 561 conn_info->ts_ticks_per_second = 1000; 562 conn_info->da_timeout_value = 200; 563 conn_info->ack_frequency = 2; 564 565 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 566 "Default cq index [%d], mss [%d]\n", 567 conn_info->default_cq, conn_info->mss); 568 569 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info); 570 if (rval) 571 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n", 572 rval, qedi_ep); 573 574 kfree(conn_info); 575 return rval; 576 } 577 578 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn) 579 { 580 struct iscsi_conn *conn = cls_conn->dd_data; 581 struct qedi_conn *qedi_conn = conn->dd_data; 582 struct qedi_ctx *qedi; 583 int rval; 584 585 qedi = qedi_conn->qedi; 586 587 rval = qedi_iscsi_update_conn(qedi, qedi_conn); 588 if (rval) { 589 iscsi_conn_printk(KERN_ALERT, conn, 590 "conn_start: FW oflload conn failed.\n"); 591 rval = -EINVAL; 592 goto start_err; 593 } 594 595 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); 596 qedi_conn->abrt_conn = 0; 597 598 rval = iscsi_conn_start(cls_conn); 599 if (rval) { 600 iscsi_conn_printk(KERN_ALERT, conn, 601 "iscsi_conn_start: FW oflload conn failed!!\n"); 602 } 603 604 start_err: 605 return rval; 606 } 607 608 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn) 609 { 610 struct iscsi_conn *conn = cls_conn->dd_data; 611 struct qedi_conn *qedi_conn = conn->dd_data; 612 struct Scsi_Host *shost; 613 struct qedi_ctx *qedi; 614 615 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 616 qedi = iscsi_host_priv(shost); 617 618 qedi_conn_free_login_resources(qedi, qedi_conn); 619 iscsi_conn_teardown(cls_conn); 620 } 621 622 static int qedi_ep_get_param(struct iscsi_endpoint *ep, 623 enum iscsi_param param, char *buf) 624 { 625 struct qedi_endpoint *qedi_ep = ep->dd_data; 626 int len; 627 628 if (!qedi_ep) 629 return -ENOTCONN; 630 631 switch (param) { 632 case ISCSI_PARAM_CONN_PORT: 633 len = sprintf(buf, "%hu\n", qedi_ep->dst_port); 634 break; 635 case ISCSI_PARAM_CONN_ADDRESS: 636 if (qedi_ep->ip_type == TCP_IPV4) 637 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr); 638 else 639 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr); 640 break; 641 default: 642 return -ENOTCONN; 643 } 644 645 return len; 646 } 647 648 static int qedi_host_get_param(struct Scsi_Host *shost, 649 enum iscsi_host_param param, char *buf) 650 { 651 struct qedi_ctx *qedi; 652 int len; 653 654 qedi = iscsi_host_priv(shost); 655 656 switch (param) { 657 case ISCSI_HOST_PARAM_HWADDRESS: 658 len = sysfs_format_mac(buf, qedi->mac, 6); 659 break; 660 case ISCSI_HOST_PARAM_NETDEV_NAME: 661 len = sprintf(buf, "host%d\n", shost->host_no); 662 break; 663 case ISCSI_HOST_PARAM_IPADDRESS: 664 if (qedi->ip_type == TCP_IPV4) 665 len = sprintf(buf, "%pI4\n", qedi->src_ip); 666 else 667 len = sprintf(buf, "%pI6\n", qedi->src_ip); 668 break; 669 default: 670 return iscsi_host_get_param(shost, param, buf); 671 } 672 673 return len; 674 } 675 676 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 677 struct iscsi_stats *stats) 678 { 679 struct iscsi_conn *conn = cls_conn->dd_data; 680 struct qed_iscsi_stats iscsi_stats; 681 struct Scsi_Host *shost; 682 struct qedi_ctx *qedi; 683 684 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 685 qedi = iscsi_host_priv(shost); 686 qedi_ops->get_stats(qedi->cdev, &iscsi_stats); 687 688 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt; 689 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt; 690 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt; 691 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt; 692 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt; 693 694 stats->txdata_octets = conn->txdata_octets; 695 stats->rxdata_octets = conn->rxdata_octets; 696 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 697 stats->dataout_pdus = conn->dataout_pdus_cnt; 698 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 699 stats->datain_pdus = conn->datain_pdus_cnt; 700 stats->r2t_pdus = conn->r2t_pdus_cnt; 701 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 702 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 703 stats->digest_err = 0; 704 stats->timeout_err = 0; 705 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 706 stats->custom[0].value = conn->eh_abort_cnt; 707 stats->custom_length = 1; 708 } 709 710 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn) 711 { 712 struct scsi_sge *bd_tbl; 713 714 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 715 716 bd_tbl->sge_addr.hi = 717 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); 718 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr; 719 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr - 720 qedi_conn->gen_pdu.req_buf; 721 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 722 bd_tbl->sge_addr.hi = 723 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); 724 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr; 725 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN; 726 } 727 728 static int qedi_iscsi_send_generic_request(struct iscsi_task *task) 729 { 730 struct qedi_cmd *cmd = task->dd_data; 731 struct qedi_conn *qedi_conn = cmd->conn; 732 char *buf; 733 int data_len; 734 int rc = 0; 735 736 qedi_iscsi_prep_generic_pdu_bd(qedi_conn); 737 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { 738 case ISCSI_OP_LOGIN: 739 qedi_send_iscsi_login(qedi_conn, task); 740 break; 741 case ISCSI_OP_NOOP_OUT: 742 data_len = qedi_conn->gen_pdu.req_buf_size; 743 buf = qedi_conn->gen_pdu.req_buf; 744 if (data_len) 745 rc = qedi_send_iscsi_nopout(qedi_conn, task, 746 buf, data_len, 1); 747 else 748 rc = qedi_send_iscsi_nopout(qedi_conn, task, 749 NULL, 0, 1); 750 break; 751 case ISCSI_OP_LOGOUT: 752 rc = qedi_send_iscsi_logout(qedi_conn, task); 753 break; 754 case ISCSI_OP_SCSI_TMFUNC: 755 rc = qedi_iscsi_abort_work(qedi_conn, task); 756 break; 757 case ISCSI_OP_TEXT: 758 rc = qedi_send_iscsi_text(qedi_conn, task); 759 break; 760 default: 761 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 762 "unsupported op 0x%x\n", task->hdr->opcode); 763 } 764 765 return rc; 766 } 767 768 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 769 { 770 struct qedi_conn *qedi_conn = conn->dd_data; 771 struct qedi_cmd *cmd = task->dd_data; 772 773 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); 774 775 qedi_conn->gen_pdu.req_buf_size = task->data_count; 776 777 if (task->data_count) { 778 memcpy(qedi_conn->gen_pdu.req_buf, task->data, 779 task->data_count); 780 qedi_conn->gen_pdu.req_wr_ptr = 781 qedi_conn->gen_pdu.req_buf + task->data_count; 782 } 783 784 cmd->conn = conn->dd_data; 785 cmd->scsi_cmd = NULL; 786 return qedi_iscsi_send_generic_request(task); 787 } 788 789 static int qedi_task_xmit(struct iscsi_task *task) 790 { 791 struct iscsi_conn *conn = task->conn; 792 struct qedi_conn *qedi_conn = conn->dd_data; 793 struct qedi_cmd *cmd = task->dd_data; 794 struct scsi_cmnd *sc = task->sc; 795 796 cmd->state = 0; 797 cmd->task = NULL; 798 cmd->use_slowpath = false; 799 cmd->conn = qedi_conn; 800 cmd->task = task; 801 cmd->io_cmd_in_list = false; 802 INIT_LIST_HEAD(&cmd->io_cmd); 803 804 if (!sc) 805 return qedi_mtask_xmit(conn, task); 806 807 cmd->scsi_cmd = sc; 808 return qedi_iscsi_send_ioreq(task); 809 } 810 811 static struct iscsi_endpoint * 812 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 813 int non_blocking) 814 { 815 struct qedi_ctx *qedi; 816 struct iscsi_endpoint *ep; 817 struct qedi_endpoint *qedi_ep; 818 struct sockaddr_in *addr; 819 struct sockaddr_in6 *addr6; 820 struct qed_dev *cdev = NULL; 821 struct qedi_uio_dev *udev = NULL; 822 struct iscsi_path path_req; 823 u32 msg_type = ISCSI_KEVENT_IF_DOWN; 824 u32 iscsi_cid = QEDI_CID_RESERVED; 825 u16 len = 0; 826 char *buf = NULL; 827 int ret, tmp; 828 829 if (!shost) { 830 ret = -ENXIO; 831 QEDI_ERR(NULL, "shost is NULL\n"); 832 return ERR_PTR(ret); 833 } 834 835 if (qedi_do_not_recover) { 836 ret = -ENOMEM; 837 return ERR_PTR(ret); 838 } 839 840 qedi = iscsi_host_priv(shost); 841 cdev = qedi->cdev; 842 udev = qedi->udev; 843 844 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) || 845 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 846 ret = -ENOMEM; 847 return ERR_PTR(ret); 848 } 849 850 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint)); 851 if (!ep) { 852 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n"); 853 ret = -ENOMEM; 854 return ERR_PTR(ret); 855 } 856 qedi_ep = ep->dd_data; 857 memset(qedi_ep, 0, sizeof(struct qedi_endpoint)); 858 qedi_ep->state = EP_STATE_IDLE; 859 qedi_ep->iscsi_cid = (u32)-1; 860 qedi_ep->qedi = qedi; 861 862 if (dst_addr->sa_family == AF_INET) { 863 addr = (struct sockaddr_in *)dst_addr; 864 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr, 865 sizeof(struct in_addr)); 866 qedi_ep->dst_port = ntohs(addr->sin_port); 867 qedi_ep->ip_type = TCP_IPV4; 868 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 869 "dst_addr=%pI4, dst_port=%u\n", 870 qedi_ep->dst_addr, qedi_ep->dst_port); 871 } else if (dst_addr->sa_family == AF_INET6) { 872 addr6 = (struct sockaddr_in6 *)dst_addr; 873 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr, 874 sizeof(struct in6_addr)); 875 qedi_ep->dst_port = ntohs(addr6->sin6_port); 876 qedi_ep->ip_type = TCP_IPV6; 877 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 878 "dst_addr=%pI6, dst_port=%u\n", 879 qedi_ep->dst_addr, qedi_ep->dst_port); 880 } else { 881 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n"); 882 } 883 884 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) { 885 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n"); 886 ret = -ENXIO; 887 goto ep_conn_exit; 888 } 889 890 ret = qedi_alloc_sq(qedi, qedi_ep); 891 if (ret) 892 goto ep_conn_exit; 893 894 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle, 895 &qedi_ep->fw_cid, &qedi_ep->p_doorbell); 896 897 if (ret) { 898 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n"); 899 ret = -ENXIO; 900 goto ep_free_sq; 901 } 902 903 iscsi_cid = qedi_ep->handle; 904 qedi_ep->iscsi_cid = iscsi_cid; 905 906 init_waitqueue_head(&qedi_ep->ofld_wait); 907 init_waitqueue_head(&qedi_ep->tcp_ofld_wait); 908 qedi_ep->state = EP_STATE_OFLDCONN_START; 909 qedi->ep_tbl[iscsi_cid] = qedi_ep; 910 911 buf = (char *)&path_req; 912 len = sizeof(path_req); 913 memset(&path_req, 0, len); 914 915 msg_type = ISCSI_KEVENT_PATH_REQ; 916 path_req.handle = (u64)qedi_ep->iscsi_cid; 917 path_req.pmtu = qedi->ll2_mtu; 918 qedi_ep->pmtu = qedi->ll2_mtu; 919 if (qedi_ep->ip_type == TCP_IPV4) { 920 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr, 921 sizeof(struct in_addr)); 922 path_req.ip_addr_len = 4; 923 } else { 924 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr, 925 sizeof(struct in6_addr)); 926 path_req.ip_addr_len = 16; 927 } 928 929 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf, 930 len); 931 if (ret) { 932 QEDI_ERR(&qedi->dbg_ctx, 933 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n", 934 iscsi_cid, ret); 935 goto ep_rel_conn; 936 } 937 938 atomic_inc(&qedi->num_offloads); 939 return ep; 940 941 ep_rel_conn: 942 qedi->ep_tbl[iscsi_cid] = NULL; 943 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 944 if (tmp) 945 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n", 946 tmp); 947 ep_free_sq: 948 qedi_free_sq(qedi, qedi_ep); 949 ep_conn_exit: 950 iscsi_destroy_endpoint(ep); 951 return ERR_PTR(ret); 952 } 953 954 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 955 { 956 struct qedi_endpoint *qedi_ep; 957 int ret = 0; 958 959 if (qedi_do_not_recover) 960 return 1; 961 962 qedi_ep = ep->dd_data; 963 if (qedi_ep->state == EP_STATE_IDLE || 964 qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 965 return -1; 966 967 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL) 968 ret = 1; 969 970 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait, 971 QEDI_OFLD_WAIT_STATE(qedi_ep), 972 msecs_to_jiffies(timeout_ms)); 973 974 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 975 ret = -1; 976 977 if (ret > 0) 978 return 1; 979 else if (!ret) 980 return 0; 981 else 982 return ret; 983 } 984 985 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn) 986 { 987 struct qedi_cmd *cmd, *cmd_tmp; 988 989 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list, 990 io_cmd) { 991 list_del_init(&cmd->io_cmd); 992 qedi_conn->active_cmd_count--; 993 } 994 } 995 996 static void qedi_ep_disconnect(struct iscsi_endpoint *ep) 997 { 998 struct qedi_endpoint *qedi_ep; 999 struct qedi_conn *qedi_conn = NULL; 1000 struct iscsi_conn *conn = NULL; 1001 struct qedi_ctx *qedi; 1002 int ret = 0; 1003 int wait_delay = 20 * HZ; 1004 int abrt_conn = 0; 1005 int count = 10; 1006 1007 qedi_ep = ep->dd_data; 1008 qedi = qedi_ep->qedi; 1009 1010 flush_work(&qedi_ep->offload_work); 1011 1012 if (qedi_ep->conn) { 1013 qedi_conn = qedi_ep->conn; 1014 conn = qedi_conn->cls_conn->dd_data; 1015 iscsi_suspend_queue(conn); 1016 abrt_conn = qedi_conn->abrt_conn; 1017 1018 while (count--) { 1019 if (!test_bit(QEDI_CONN_FW_CLEANUP, 1020 &qedi_conn->flags)) { 1021 break; 1022 } 1023 msleep(1000); 1024 } 1025 1026 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 1027 if (qedi_do_not_recover) { 1028 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1029 "Do not recover cid=0x%x\n", 1030 qedi_ep->iscsi_cid); 1031 goto ep_exit_recover; 1032 } 1033 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1034 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n", 1035 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state); 1036 qedi_cleanup_active_cmd_list(qedi_conn); 1037 goto ep_release_conn; 1038 } 1039 } 1040 1041 if (qedi_do_not_recover) 1042 goto ep_exit_recover; 1043 1044 switch (qedi_ep->state) { 1045 case EP_STATE_OFLDCONN_START: 1046 goto ep_release_conn; 1047 case EP_STATE_OFLDCONN_FAILED: 1048 break; 1049 case EP_STATE_OFLDCONN_COMPL: 1050 if (unlikely(!qedi_conn)) 1051 break; 1052 1053 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1054 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n", 1055 qedi_conn->active_cmd_count, abrt_conn, 1056 qedi_ep->state, 1057 qedi_ep->iscsi_cid, 1058 qedi_ep->conn 1059 ); 1060 1061 if (!qedi_conn->active_cmd_count) 1062 abrt_conn = 0; 1063 else 1064 abrt_conn = 1; 1065 1066 if (abrt_conn) 1067 qedi_clearsq(qedi, qedi_conn, NULL); 1068 break; 1069 default: 1070 break; 1071 } 1072 1073 qedi_ep->state = EP_STATE_DISCONN_START; 1074 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn); 1075 if (ret) { 1076 QEDI_WARN(&qedi->dbg_ctx, 1077 "destroy_conn failed returned %d\n", ret); 1078 } else { 1079 ret = wait_event_interruptible_timeout( 1080 qedi_ep->tcp_ofld_wait, 1081 (qedi_ep->state != 1082 EP_STATE_DISCONN_START), 1083 wait_delay); 1084 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) { 1085 QEDI_WARN(&qedi->dbg_ctx, 1086 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n", 1087 ret, wait_delay, qedi_ep->iscsi_cid); 1088 } 1089 } 1090 1091 ep_release_conn: 1092 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 1093 if (ret) 1094 QEDI_WARN(&qedi->dbg_ctx, 1095 "release_conn returned %d, cid=0x%x\n", 1096 ret, qedi_ep->iscsi_cid); 1097 ep_exit_recover: 1098 qedi_ep->state = EP_STATE_IDLE; 1099 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL; 1100 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL; 1101 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port); 1102 qedi_free_sq(qedi, qedi_ep); 1103 1104 if (qedi_conn) 1105 qedi_conn->ep = NULL; 1106 1107 qedi_ep->conn = NULL; 1108 qedi_ep->qedi = NULL; 1109 atomic_dec(&qedi->num_offloads); 1110 1111 iscsi_destroy_endpoint(ep); 1112 } 1113 1114 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid) 1115 { 1116 struct qed_dev *cdev = qedi->cdev; 1117 struct qedi_uio_dev *udev; 1118 struct qedi_uio_ctrl *uctrl; 1119 struct sk_buff *skb; 1120 u32 len; 1121 int rc = 0; 1122 1123 udev = qedi->udev; 1124 if (!udev) { 1125 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n"); 1126 return -EINVAL; 1127 } 1128 1129 uctrl = (struct qedi_uio_ctrl *)udev->uctrl; 1130 if (!uctrl) { 1131 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n"); 1132 return -EINVAL; 1133 } 1134 1135 len = uctrl->host_tx_pkt_len; 1136 if (!len) { 1137 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len); 1138 return -EINVAL; 1139 } 1140 1141 skb = alloc_skb(len, GFP_ATOMIC); 1142 if (!skb) { 1143 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n"); 1144 return -EINVAL; 1145 } 1146 1147 skb_put(skb, len); 1148 memcpy(skb->data, udev->tx_pkt, len); 1149 skb->ip_summed = CHECKSUM_NONE; 1150 1151 if (vlanid) 1152 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); 1153 1154 rc = qedi_ops->ll2->start_xmit(cdev, skb); 1155 if (rc) { 1156 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n", 1157 rc); 1158 kfree_skb(skb); 1159 } 1160 1161 uctrl->host_tx_pkt_len = 0; 1162 uctrl->hw_tx_cons++; 1163 1164 return rc; 1165 } 1166 1167 static void qedi_offload_work(struct work_struct *work) 1168 { 1169 struct qedi_endpoint *qedi_ep = 1170 container_of(work, struct qedi_endpoint, offload_work); 1171 struct qedi_ctx *qedi; 1172 int wait_delay = 20 * HZ; 1173 int ret; 1174 1175 qedi = qedi_ep->qedi; 1176 1177 ret = qedi_iscsi_offload_conn(qedi_ep); 1178 if (ret) { 1179 QEDI_ERR(&qedi->dbg_ctx, 1180 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n", 1181 qedi_ep->iscsi_cid, qedi_ep, ret); 1182 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1183 return; 1184 } 1185 1186 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait, 1187 (qedi_ep->state == 1188 EP_STATE_OFLDCONN_COMPL), 1189 wait_delay); 1190 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) { 1191 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1192 QEDI_ERR(&qedi->dbg_ctx, 1193 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n", 1194 qedi_ep->iscsi_cid, qedi_ep); 1195 } 1196 } 1197 1198 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data) 1199 { 1200 struct qedi_ctx *qedi; 1201 struct qedi_endpoint *qedi_ep; 1202 int ret = 0; 1203 u32 iscsi_cid; 1204 u16 port_id = 0; 1205 1206 if (!shost) { 1207 ret = -ENXIO; 1208 QEDI_ERR(NULL, "shost is NULL\n"); 1209 return ret; 1210 } 1211 1212 if (strcmp(shost->hostt->proc_name, "qedi")) { 1213 ret = -ENXIO; 1214 QEDI_ERR(NULL, "shost %s is invalid\n", 1215 shost->hostt->proc_name); 1216 return ret; 1217 } 1218 1219 qedi = iscsi_host_priv(shost); 1220 if (path_data->handle == QEDI_PATH_HANDLE) { 1221 ret = qedi_data_avail(qedi, path_data->vlan_id); 1222 goto set_path_exit; 1223 } 1224 1225 iscsi_cid = (u32)path_data->handle; 1226 qedi_ep = qedi->ep_tbl[iscsi_cid]; 1227 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1228 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); 1229 if (!qedi_ep) { 1230 ret = -EINVAL; 1231 goto set_path_exit; 1232 } 1233 1234 if (!is_valid_ether_addr(&path_data->mac_addr[0])) { 1235 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n"); 1236 ret = -EIO; 1237 goto set_path_exit; 1238 } 1239 1240 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]); 1241 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]); 1242 1243 qedi_ep->vlan_id = path_data->vlan_id; 1244 if (path_data->pmtu < DEF_PATH_MTU) { 1245 qedi_ep->pmtu = qedi->ll2_mtu; 1246 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1247 "MTU cannot be %u, using default MTU %u\n", 1248 path_data->pmtu, qedi_ep->pmtu); 1249 } 1250 1251 if (path_data->pmtu != qedi->ll2_mtu) { 1252 if (path_data->pmtu > JUMBO_MTU) { 1253 ret = -EINVAL; 1254 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu); 1255 goto set_path_exit; 1256 } 1257 1258 qedi_reset_host_mtu(qedi, path_data->pmtu); 1259 qedi_ep->pmtu = qedi->ll2_mtu; 1260 } 1261 1262 port_id = qedi_ep->src_port; 1263 if (port_id >= QEDI_LOCAL_PORT_MIN && 1264 port_id < QEDI_LOCAL_PORT_MAX) { 1265 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id)) 1266 port_id = 0; 1267 } else { 1268 port_id = 0; 1269 } 1270 1271 if (!port_id) { 1272 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl); 1273 if (port_id == QEDI_LOCAL_PORT_INVALID) { 1274 QEDI_ERR(&qedi->dbg_ctx, 1275 "Failed to allocate port id for iscsi_cid=0x%x\n", 1276 iscsi_cid); 1277 ret = -ENOMEM; 1278 goto set_path_exit; 1279 } 1280 } 1281 1282 qedi_ep->src_port = port_id; 1283 1284 if (qedi_ep->ip_type == TCP_IPV4) { 1285 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr, 1286 sizeof(struct in_addr)); 1287 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr, 1288 sizeof(struct in_addr)); 1289 qedi->ip_type = TCP_IPV4; 1290 1291 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1292 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n", 1293 qedi_ep->src_addr, qedi_ep->src_port, 1294 qedi_ep->dst_addr, qedi_ep->dst_port); 1295 } else { 1296 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr, 1297 sizeof(struct in6_addr)); 1298 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr, 1299 sizeof(struct in6_addr)); 1300 qedi->ip_type = TCP_IPV6; 1301 1302 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1303 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n", 1304 qedi_ep->src_addr, qedi_ep->src_port, 1305 qedi_ep->dst_addr, qedi_ep->dst_port); 1306 } 1307 1308 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work); 1309 queue_work(qedi->offload_thread, &qedi_ep->offload_work); 1310 1311 ret = 0; 1312 1313 set_path_exit: 1314 return ret; 1315 } 1316 1317 static umode_t qedi_attr_is_visible(int param_type, int param) 1318 { 1319 switch (param_type) { 1320 case ISCSI_HOST_PARAM: 1321 switch (param) { 1322 case ISCSI_HOST_PARAM_NETDEV_NAME: 1323 case ISCSI_HOST_PARAM_HWADDRESS: 1324 case ISCSI_HOST_PARAM_IPADDRESS: 1325 return 0444; 1326 default: 1327 return 0; 1328 } 1329 case ISCSI_PARAM: 1330 switch (param) { 1331 case ISCSI_PARAM_MAX_RECV_DLENGTH: 1332 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 1333 case ISCSI_PARAM_HDRDGST_EN: 1334 case ISCSI_PARAM_DATADGST_EN: 1335 case ISCSI_PARAM_CONN_ADDRESS: 1336 case ISCSI_PARAM_CONN_PORT: 1337 case ISCSI_PARAM_EXP_STATSN: 1338 case ISCSI_PARAM_PERSISTENT_ADDRESS: 1339 case ISCSI_PARAM_PERSISTENT_PORT: 1340 case ISCSI_PARAM_PING_TMO: 1341 case ISCSI_PARAM_RECV_TMO: 1342 case ISCSI_PARAM_INITIAL_R2T_EN: 1343 case ISCSI_PARAM_MAX_R2T: 1344 case ISCSI_PARAM_IMM_DATA_EN: 1345 case ISCSI_PARAM_FIRST_BURST: 1346 case ISCSI_PARAM_MAX_BURST: 1347 case ISCSI_PARAM_PDU_INORDER_EN: 1348 case ISCSI_PARAM_DATASEQ_INORDER_EN: 1349 case ISCSI_PARAM_ERL: 1350 case ISCSI_PARAM_TARGET_NAME: 1351 case ISCSI_PARAM_TPGT: 1352 case ISCSI_PARAM_USERNAME: 1353 case ISCSI_PARAM_PASSWORD: 1354 case ISCSI_PARAM_USERNAME_IN: 1355 case ISCSI_PARAM_PASSWORD_IN: 1356 case ISCSI_PARAM_FAST_ABORT: 1357 case ISCSI_PARAM_ABORT_TMO: 1358 case ISCSI_PARAM_LU_RESET_TMO: 1359 case ISCSI_PARAM_TGT_RESET_TMO: 1360 case ISCSI_PARAM_IFACE_NAME: 1361 case ISCSI_PARAM_INITIATOR_NAME: 1362 case ISCSI_PARAM_BOOT_ROOT: 1363 case ISCSI_PARAM_BOOT_NIC: 1364 case ISCSI_PARAM_BOOT_TARGET: 1365 return 0444; 1366 default: 1367 return 0; 1368 } 1369 } 1370 1371 return 0; 1372 } 1373 1374 static void qedi_cleanup_task(struct iscsi_task *task) 1375 { 1376 if (!task->sc || task->state == ISCSI_TASK_PENDING) { 1377 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n", 1378 refcount_read(&task->refcount)); 1379 return; 1380 } 1381 1382 qedi_iscsi_unmap_sg_list(task->dd_data); 1383 } 1384 1385 struct iscsi_transport qedi_iscsi_transport = { 1386 .owner = THIS_MODULE, 1387 .name = QEDI_MODULE_NAME, 1388 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST | 1389 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO, 1390 .create_session = qedi_session_create, 1391 .destroy_session = qedi_session_destroy, 1392 .create_conn = qedi_conn_create, 1393 .bind_conn = qedi_conn_bind, 1394 .start_conn = qedi_conn_start, 1395 .stop_conn = iscsi_conn_stop, 1396 .destroy_conn = qedi_conn_destroy, 1397 .set_param = iscsi_set_param, 1398 .get_ep_param = qedi_ep_get_param, 1399 .get_conn_param = iscsi_conn_get_param, 1400 .get_session_param = iscsi_session_get_param, 1401 .get_host_param = qedi_host_get_param, 1402 .send_pdu = iscsi_conn_send_pdu, 1403 .get_stats = qedi_conn_get_stats, 1404 .xmit_task = qedi_task_xmit, 1405 .cleanup_task = qedi_cleanup_task, 1406 .session_recovery_timedout = iscsi_session_recovery_timedout, 1407 .ep_connect = qedi_ep_connect, 1408 .ep_poll = qedi_ep_poll, 1409 .ep_disconnect = qedi_ep_disconnect, 1410 .set_path = qedi_set_path, 1411 .attr_is_visible = qedi_attr_is_visible, 1412 }; 1413 1414 void qedi_start_conn_recovery(struct qedi_ctx *qedi, 1415 struct qedi_conn *qedi_conn) 1416 { 1417 struct iscsi_cls_session *cls_sess; 1418 struct iscsi_cls_conn *cls_conn; 1419 struct iscsi_conn *conn; 1420 1421 cls_conn = qedi_conn->cls_conn; 1422 conn = cls_conn->dd_data; 1423 cls_sess = iscsi_conn_to_session(cls_conn); 1424 1425 if (iscsi_is_session_online(cls_sess)) { 1426 qedi_conn->abrt_conn = 1; 1427 QEDI_ERR(&qedi->dbg_ctx, 1428 "Failing connection, state=0x%x, cid=0x%x\n", 1429 conn->session->state, qedi_conn->iscsi_conn_id); 1430 iscsi_conn_failure(qedi_conn->cls_conn->dd_data, 1431 ISCSI_ERR_CONN_FAILED); 1432 } 1433 } 1434 1435 static const struct { 1436 enum iscsi_error_types error_code; 1437 char *err_string; 1438 } qedi_iscsi_error[] = { 1439 { ISCSI_STATUS_NONE, 1440 "tcp_error none" 1441 }, 1442 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH, 1443 "task cid mismatch" 1444 }, 1445 { ISCSI_CONN_ERROR_TASK_NOT_VALID, 1446 "invalid task" 1447 }, 1448 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL, 1449 "rq ring full" 1450 }, 1451 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL, 1452 "cmdq ring full" 1453 }, 1454 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED, 1455 "sge caching failed" 1456 }, 1457 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR, 1458 "hdr digest error" 1459 }, 1460 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR, 1461 "local cmpl error" 1462 }, 1463 { ISCSI_CONN_ERROR_DATA_OVERRUN, 1464 "invalid task" 1465 }, 1466 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR, 1467 "out of sge error" 1468 }, 1469 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR, 1470 "tcp ip fragment error" 1471 }, 1472 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN, 1473 "AHS len protocol error" 1474 }, 1475 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE, 1476 "itt out of range error" 1477 }, 1478 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE, 1479 "data seg more than pdu size" 1480 }, 1481 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE, 1482 "invalid opcode" 1483 }, 1484 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE, 1485 "invalid opcode before update" 1486 }, 1487 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL, 1488 "unexpected opcode" 1489 }, 1490 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA, 1491 "r2t carries no data" 1492 }, 1493 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN, 1494 "data sn error" 1495 }, 1496 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT, 1497 "data TTT error" 1498 }, 1499 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT, 1500 "r2t TTT error" 1501 }, 1502 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET, 1503 "buffer offset error" 1504 }, 1505 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO, 1506 "buffer offset ooo" 1507 }, 1508 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN, 1509 "data seg len 0" 1510 }, 1511 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0, 1512 "data xer len error" 1513 }, 1514 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1, 1515 "data xer len1 error" 1516 }, 1517 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2, 1518 "data xer len2 error" 1519 }, 1520 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN, 1521 "protocol lun error" 1522 }, 1523 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO, 1524 "f bit zero error" 1525 }, 1526 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN, 1527 "exp stat sn error" 1528 }, 1529 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO, 1530 "dsl not zero error" 1531 }, 1532 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL, 1533 "invalid dsl" 1534 }, 1535 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG, 1536 "data seg len too big" 1537 }, 1538 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT, 1539 "outstanding r2t count error" 1540 }, 1541 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH, 1542 "sense datalen error" 1543 }, 1544 }; 1545 1546 char *qedi_get_iscsi_error(enum iscsi_error_types err_code) 1547 { 1548 int i; 1549 char *msg = NULL; 1550 1551 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) { 1552 if (qedi_iscsi_error[i].error_code == err_code) { 1553 msg = qedi_iscsi_error[i].err_string; 1554 break; 1555 } 1556 } 1557 return msg; 1558 } 1559 1560 void qedi_process_iscsi_error(struct qedi_endpoint *ep, struct async_data *data) 1561 { 1562 struct qedi_conn *qedi_conn; 1563 struct qedi_ctx *qedi; 1564 char warn_notice[] = "iscsi_warning"; 1565 char error_notice[] = "iscsi_error"; 1566 char unknown_msg[] = "Unknown error"; 1567 char *message; 1568 int need_recovery = 0; 1569 u32 err_mask = 0; 1570 char *msg; 1571 1572 if (!ep) 1573 return; 1574 1575 qedi_conn = ep->conn; 1576 if (!qedi_conn) 1577 return; 1578 1579 qedi = ep->qedi; 1580 1581 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n", 1582 data->error_code); 1583 1584 if (err_mask) { 1585 need_recovery = 0; 1586 message = warn_notice; 1587 } else { 1588 need_recovery = 1; 1589 message = error_notice; 1590 } 1591 1592 msg = qedi_get_iscsi_error(data->error_code); 1593 if (!msg) { 1594 need_recovery = 0; 1595 msg = unknown_msg; 1596 } 1597 1598 iscsi_conn_printk(KERN_ALERT, 1599 qedi_conn->cls_conn->dd_data, 1600 "qedi: %s - %s\n", message, msg); 1601 1602 if (need_recovery) 1603 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1604 } 1605 1606 void qedi_process_tcp_error(struct qedi_endpoint *ep, struct async_data *data) 1607 { 1608 struct qedi_conn *qedi_conn; 1609 1610 if (!ep) 1611 return; 1612 1613 qedi_conn = ep->conn; 1614 if (!qedi_conn) 1615 return; 1616 1617 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n", 1618 data->error_code); 1619 1620 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1621 } 1622