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 mss = pmtu - hdrs; 475 476 if (!mss) 477 mss = DEF_MSS; 478 479 return mss; 480 } 481 482 static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep) 483 { 484 struct qedi_ctx *qedi = qedi_ep->qedi; 485 struct qed_iscsi_params_offload *conn_info; 486 int rval; 487 int i; 488 489 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 490 if (!conn_info) { 491 QEDI_ERR(&qedi->dbg_ctx, 492 "Failed to allocate memory ep=%p\n", qedi_ep); 493 return -ENOMEM; 494 } 495 496 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac); 497 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac); 498 499 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]); 500 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]); 501 502 if (qedi_ep->ip_type == TCP_IPV4) { 503 conn_info->ip_version = 0; 504 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 505 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n", 506 qedi_ep->src_addr, qedi_ep->dst_addr); 507 } else { 508 for (i = 1; i < 4; i++) { 509 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]); 510 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]); 511 } 512 513 conn_info->ip_version = 1; 514 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 515 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n", 516 qedi_ep->src_addr, qedi_ep->dst_addr); 517 } 518 519 conn_info->src.port = qedi_ep->src_port; 520 conn_info->dst.port = qedi_ep->dst_port; 521 522 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE; 523 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma; 524 conn_info->vlan_id = qedi_ep->vlan_id; 525 526 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1); 527 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1); 528 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1); 529 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1); 530 531 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues); 532 533 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT; 534 conn_info->dup_ack_theshold = 3; 535 conn_info->rcv_wnd = 65535; 536 537 conn_info->ss_thresh = 65535; 538 conn_info->srtt = 300; 539 conn_info->rtt_var = 150; 540 conn_info->flow_label = 0; 541 conn_info->ka_timeout = DEF_KA_TIMEOUT; 542 conn_info->ka_interval = DEF_KA_INTERVAL; 543 conn_info->max_rt_time = DEF_MAX_RT_TIME; 544 conn_info->ttl = DEF_TTL; 545 conn_info->tos_or_tc = DEF_TOS; 546 conn_info->remote_port = qedi_ep->dst_port; 547 conn_info->local_port = qedi_ep->src_port; 548 549 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu, 550 (qedi_ep->ip_type == TCP_IPV6), 551 1, (qedi_ep->vlan_id != 0)); 552 553 conn_info->cwnd = DEF_MAX_CWND * conn_info->mss; 554 conn_info->rcv_wnd_scale = 4; 555 conn_info->da_timeout_value = 200; 556 conn_info->ack_frequency = 2; 557 558 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 559 "Default cq index [%d], mss [%d]\n", 560 conn_info->default_cq, conn_info->mss); 561 562 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info); 563 if (rval) 564 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n", 565 rval, qedi_ep); 566 567 kfree(conn_info); 568 return rval; 569 } 570 571 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn) 572 { 573 struct iscsi_conn *conn = cls_conn->dd_data; 574 struct qedi_conn *qedi_conn = conn->dd_data; 575 struct qedi_ctx *qedi; 576 int rval; 577 578 qedi = qedi_conn->qedi; 579 580 rval = qedi_iscsi_update_conn(qedi, qedi_conn); 581 if (rval) { 582 iscsi_conn_printk(KERN_ALERT, conn, 583 "conn_start: FW oflload conn failed.\n"); 584 rval = -EINVAL; 585 goto start_err; 586 } 587 588 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); 589 qedi_conn->abrt_conn = 0; 590 591 rval = iscsi_conn_start(cls_conn); 592 if (rval) { 593 iscsi_conn_printk(KERN_ALERT, conn, 594 "iscsi_conn_start: FW oflload conn failed!!\n"); 595 } 596 597 start_err: 598 return rval; 599 } 600 601 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn) 602 { 603 struct iscsi_conn *conn = cls_conn->dd_data; 604 struct qedi_conn *qedi_conn = conn->dd_data; 605 struct Scsi_Host *shost; 606 struct qedi_ctx *qedi; 607 608 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 609 qedi = iscsi_host_priv(shost); 610 611 qedi_conn_free_login_resources(qedi, qedi_conn); 612 iscsi_conn_teardown(cls_conn); 613 } 614 615 static int qedi_ep_get_param(struct iscsi_endpoint *ep, 616 enum iscsi_param param, char *buf) 617 { 618 struct qedi_endpoint *qedi_ep = ep->dd_data; 619 int len; 620 621 if (!qedi_ep) 622 return -ENOTCONN; 623 624 switch (param) { 625 case ISCSI_PARAM_CONN_PORT: 626 len = sprintf(buf, "%hu\n", qedi_ep->dst_port); 627 break; 628 case ISCSI_PARAM_CONN_ADDRESS: 629 if (qedi_ep->ip_type == TCP_IPV4) 630 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr); 631 else 632 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr); 633 break; 634 default: 635 return -ENOTCONN; 636 } 637 638 return len; 639 } 640 641 static int qedi_host_get_param(struct Scsi_Host *shost, 642 enum iscsi_host_param param, char *buf) 643 { 644 struct qedi_ctx *qedi; 645 int len; 646 647 qedi = iscsi_host_priv(shost); 648 649 switch (param) { 650 case ISCSI_HOST_PARAM_HWADDRESS: 651 len = sysfs_format_mac(buf, qedi->mac, 6); 652 break; 653 case ISCSI_HOST_PARAM_NETDEV_NAME: 654 len = sprintf(buf, "host%d\n", shost->host_no); 655 break; 656 case ISCSI_HOST_PARAM_IPADDRESS: 657 if (qedi->ip_type == TCP_IPV4) 658 len = sprintf(buf, "%pI4\n", qedi->src_ip); 659 else 660 len = sprintf(buf, "%pI6\n", qedi->src_ip); 661 break; 662 default: 663 return iscsi_host_get_param(shost, param, buf); 664 } 665 666 return len; 667 } 668 669 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 670 struct iscsi_stats *stats) 671 { 672 struct iscsi_conn *conn = cls_conn->dd_data; 673 struct qed_iscsi_stats iscsi_stats; 674 struct Scsi_Host *shost; 675 struct qedi_ctx *qedi; 676 677 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 678 qedi = iscsi_host_priv(shost); 679 qedi_ops->get_stats(qedi->cdev, &iscsi_stats); 680 681 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt; 682 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt; 683 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt; 684 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt; 685 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt; 686 687 stats->txdata_octets = conn->txdata_octets; 688 stats->rxdata_octets = conn->rxdata_octets; 689 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 690 stats->dataout_pdus = conn->dataout_pdus_cnt; 691 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 692 stats->datain_pdus = conn->datain_pdus_cnt; 693 stats->r2t_pdus = conn->r2t_pdus_cnt; 694 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 695 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 696 stats->digest_err = 0; 697 stats->timeout_err = 0; 698 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 699 stats->custom[0].value = conn->eh_abort_cnt; 700 stats->custom_length = 1; 701 } 702 703 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn) 704 { 705 struct scsi_sge *bd_tbl; 706 707 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 708 709 bd_tbl->sge_addr.hi = 710 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); 711 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr; 712 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr - 713 qedi_conn->gen_pdu.req_buf; 714 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 715 bd_tbl->sge_addr.hi = 716 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); 717 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr; 718 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN; 719 } 720 721 static int qedi_iscsi_send_generic_request(struct iscsi_task *task) 722 { 723 struct qedi_cmd *cmd = task->dd_data; 724 struct qedi_conn *qedi_conn = cmd->conn; 725 char *buf; 726 int data_len; 727 int rc = 0; 728 729 qedi_iscsi_prep_generic_pdu_bd(qedi_conn); 730 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { 731 case ISCSI_OP_LOGIN: 732 qedi_send_iscsi_login(qedi_conn, task); 733 break; 734 case ISCSI_OP_NOOP_OUT: 735 data_len = qedi_conn->gen_pdu.req_buf_size; 736 buf = qedi_conn->gen_pdu.req_buf; 737 if (data_len) 738 rc = qedi_send_iscsi_nopout(qedi_conn, task, 739 buf, data_len, 1); 740 else 741 rc = qedi_send_iscsi_nopout(qedi_conn, task, 742 NULL, 0, 1); 743 break; 744 case ISCSI_OP_LOGOUT: 745 rc = qedi_send_iscsi_logout(qedi_conn, task); 746 break; 747 case ISCSI_OP_SCSI_TMFUNC: 748 rc = qedi_iscsi_abort_work(qedi_conn, task); 749 break; 750 case ISCSI_OP_TEXT: 751 rc = qedi_send_iscsi_text(qedi_conn, task); 752 break; 753 default: 754 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 755 "unsupported op 0x%x\n", task->hdr->opcode); 756 } 757 758 return rc; 759 } 760 761 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 762 { 763 struct qedi_conn *qedi_conn = conn->dd_data; 764 struct qedi_cmd *cmd = task->dd_data; 765 766 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); 767 768 qedi_conn->gen_pdu.req_buf_size = task->data_count; 769 770 if (task->data_count) { 771 memcpy(qedi_conn->gen_pdu.req_buf, task->data, 772 task->data_count); 773 qedi_conn->gen_pdu.req_wr_ptr = 774 qedi_conn->gen_pdu.req_buf + task->data_count; 775 } 776 777 cmd->conn = conn->dd_data; 778 cmd->scsi_cmd = NULL; 779 return qedi_iscsi_send_generic_request(task); 780 } 781 782 static int qedi_task_xmit(struct iscsi_task *task) 783 { 784 struct iscsi_conn *conn = task->conn; 785 struct qedi_conn *qedi_conn = conn->dd_data; 786 struct qedi_cmd *cmd = task->dd_data; 787 struct scsi_cmnd *sc = task->sc; 788 789 cmd->state = 0; 790 cmd->task = NULL; 791 cmd->use_slowpath = false; 792 cmd->conn = qedi_conn; 793 cmd->task = task; 794 cmd->io_cmd_in_list = false; 795 INIT_LIST_HEAD(&cmd->io_cmd); 796 797 if (!sc) 798 return qedi_mtask_xmit(conn, task); 799 800 cmd->scsi_cmd = sc; 801 return qedi_iscsi_send_ioreq(task); 802 } 803 804 static struct iscsi_endpoint * 805 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 806 int non_blocking) 807 { 808 struct qedi_ctx *qedi; 809 struct iscsi_endpoint *ep; 810 struct qedi_endpoint *qedi_ep; 811 struct sockaddr_in *addr; 812 struct sockaddr_in6 *addr6; 813 struct qed_dev *cdev = NULL; 814 struct qedi_uio_dev *udev = NULL; 815 struct iscsi_path path_req; 816 u32 msg_type = ISCSI_KEVENT_IF_DOWN; 817 u32 iscsi_cid = QEDI_CID_RESERVED; 818 u16 len = 0; 819 char *buf = NULL; 820 int ret, tmp; 821 822 if (!shost) { 823 ret = -ENXIO; 824 QEDI_ERR(NULL, "shost is NULL\n"); 825 return ERR_PTR(ret); 826 } 827 828 if (qedi_do_not_recover) { 829 ret = -ENOMEM; 830 return ERR_PTR(ret); 831 } 832 833 qedi = iscsi_host_priv(shost); 834 cdev = qedi->cdev; 835 udev = qedi->udev; 836 837 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) || 838 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 839 ret = -ENOMEM; 840 return ERR_PTR(ret); 841 } 842 843 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint)); 844 if (!ep) { 845 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n"); 846 ret = -ENOMEM; 847 return ERR_PTR(ret); 848 } 849 qedi_ep = ep->dd_data; 850 memset(qedi_ep, 0, sizeof(struct qedi_endpoint)); 851 qedi_ep->state = EP_STATE_IDLE; 852 qedi_ep->iscsi_cid = (u32)-1; 853 qedi_ep->qedi = qedi; 854 855 if (dst_addr->sa_family == AF_INET) { 856 addr = (struct sockaddr_in *)dst_addr; 857 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr, 858 sizeof(struct in_addr)); 859 qedi_ep->dst_port = ntohs(addr->sin_port); 860 qedi_ep->ip_type = TCP_IPV4; 861 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 862 "dst_addr=%pI4, dst_port=%u\n", 863 qedi_ep->dst_addr, qedi_ep->dst_port); 864 } else if (dst_addr->sa_family == AF_INET6) { 865 addr6 = (struct sockaddr_in6 *)dst_addr; 866 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr, 867 sizeof(struct in6_addr)); 868 qedi_ep->dst_port = ntohs(addr6->sin6_port); 869 qedi_ep->ip_type = TCP_IPV6; 870 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 871 "dst_addr=%pI6, dst_port=%u\n", 872 qedi_ep->dst_addr, qedi_ep->dst_port); 873 } else { 874 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n"); 875 } 876 877 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) { 878 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n"); 879 ret = -ENXIO; 880 goto ep_conn_exit; 881 } 882 883 ret = qedi_alloc_sq(qedi, qedi_ep); 884 if (ret) 885 goto ep_conn_exit; 886 887 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle, 888 &qedi_ep->fw_cid, &qedi_ep->p_doorbell); 889 890 if (ret) { 891 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n"); 892 ret = -ENXIO; 893 goto ep_free_sq; 894 } 895 896 iscsi_cid = qedi_ep->handle; 897 qedi_ep->iscsi_cid = iscsi_cid; 898 899 init_waitqueue_head(&qedi_ep->ofld_wait); 900 init_waitqueue_head(&qedi_ep->tcp_ofld_wait); 901 qedi_ep->state = EP_STATE_OFLDCONN_START; 902 qedi->ep_tbl[iscsi_cid] = qedi_ep; 903 904 buf = (char *)&path_req; 905 len = sizeof(path_req); 906 memset(&path_req, 0, len); 907 908 msg_type = ISCSI_KEVENT_PATH_REQ; 909 path_req.handle = (u64)qedi_ep->iscsi_cid; 910 path_req.pmtu = qedi->ll2_mtu; 911 qedi_ep->pmtu = qedi->ll2_mtu; 912 if (qedi_ep->ip_type == TCP_IPV4) { 913 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr, 914 sizeof(struct in_addr)); 915 path_req.ip_addr_len = 4; 916 } else { 917 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr, 918 sizeof(struct in6_addr)); 919 path_req.ip_addr_len = 16; 920 } 921 922 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf, 923 len); 924 if (ret) { 925 QEDI_ERR(&qedi->dbg_ctx, 926 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n", 927 iscsi_cid, ret); 928 goto ep_rel_conn; 929 } 930 931 atomic_inc(&qedi->num_offloads); 932 return ep; 933 934 ep_rel_conn: 935 qedi->ep_tbl[iscsi_cid] = NULL; 936 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 937 if (tmp) 938 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n", 939 tmp); 940 ep_free_sq: 941 qedi_free_sq(qedi, qedi_ep); 942 ep_conn_exit: 943 iscsi_destroy_endpoint(ep); 944 return ERR_PTR(ret); 945 } 946 947 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 948 { 949 struct qedi_endpoint *qedi_ep; 950 int ret = 0; 951 952 if (qedi_do_not_recover) 953 return 1; 954 955 qedi_ep = ep->dd_data; 956 if (qedi_ep->state == EP_STATE_IDLE || 957 qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 958 return -1; 959 960 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL) 961 ret = 1; 962 963 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait, 964 QEDI_OFLD_WAIT_STATE(qedi_ep), 965 msecs_to_jiffies(timeout_ms)); 966 967 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 968 ret = -1; 969 970 if (ret > 0) 971 return 1; 972 else if (!ret) 973 return 0; 974 else 975 return ret; 976 } 977 978 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn) 979 { 980 struct qedi_cmd *cmd, *cmd_tmp; 981 982 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list, 983 io_cmd) { 984 list_del_init(&cmd->io_cmd); 985 qedi_conn->active_cmd_count--; 986 } 987 } 988 989 static void qedi_ep_disconnect(struct iscsi_endpoint *ep) 990 { 991 struct qedi_endpoint *qedi_ep; 992 struct qedi_conn *qedi_conn = NULL; 993 struct iscsi_conn *conn = NULL; 994 struct qedi_ctx *qedi; 995 int ret = 0; 996 int wait_delay = 20 * HZ; 997 int abrt_conn = 0; 998 int count = 10; 999 1000 qedi_ep = ep->dd_data; 1001 qedi = qedi_ep->qedi; 1002 1003 flush_work(&qedi_ep->offload_work); 1004 1005 if (qedi_ep->conn) { 1006 qedi_conn = qedi_ep->conn; 1007 conn = qedi_conn->cls_conn->dd_data; 1008 iscsi_suspend_queue(conn); 1009 abrt_conn = qedi_conn->abrt_conn; 1010 1011 while (count--) { 1012 if (!test_bit(QEDI_CONN_FW_CLEANUP, 1013 &qedi_conn->flags)) { 1014 break; 1015 } 1016 msleep(1000); 1017 } 1018 1019 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 1020 if (qedi_do_not_recover) { 1021 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1022 "Do not recover cid=0x%x\n", 1023 qedi_ep->iscsi_cid); 1024 goto ep_exit_recover; 1025 } 1026 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1027 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n", 1028 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state); 1029 qedi_cleanup_active_cmd_list(qedi_conn); 1030 goto ep_release_conn; 1031 } 1032 } 1033 1034 if (qedi_do_not_recover) 1035 goto ep_exit_recover; 1036 1037 switch (qedi_ep->state) { 1038 case EP_STATE_OFLDCONN_START: 1039 goto ep_release_conn; 1040 case EP_STATE_OFLDCONN_FAILED: 1041 break; 1042 case EP_STATE_OFLDCONN_COMPL: 1043 if (unlikely(!qedi_conn)) 1044 break; 1045 1046 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1047 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n", 1048 qedi_conn->active_cmd_count, abrt_conn, 1049 qedi_ep->state, 1050 qedi_ep->iscsi_cid, 1051 qedi_ep->conn 1052 ); 1053 1054 if (!qedi_conn->active_cmd_count) 1055 abrt_conn = 0; 1056 else 1057 abrt_conn = 1; 1058 1059 if (abrt_conn) 1060 qedi_clearsq(qedi, qedi_conn, NULL); 1061 break; 1062 default: 1063 break; 1064 } 1065 1066 qedi_ep->state = EP_STATE_DISCONN_START; 1067 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn); 1068 if (ret) { 1069 QEDI_WARN(&qedi->dbg_ctx, 1070 "destroy_conn failed returned %d\n", ret); 1071 } else { 1072 ret = wait_event_interruptible_timeout( 1073 qedi_ep->tcp_ofld_wait, 1074 (qedi_ep->state != 1075 EP_STATE_DISCONN_START), 1076 wait_delay); 1077 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) { 1078 QEDI_WARN(&qedi->dbg_ctx, 1079 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n", 1080 ret, wait_delay, qedi_ep->iscsi_cid); 1081 } 1082 } 1083 1084 ep_release_conn: 1085 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 1086 if (ret) 1087 QEDI_WARN(&qedi->dbg_ctx, 1088 "release_conn returned %d, cid=0x%x\n", 1089 ret, qedi_ep->iscsi_cid); 1090 ep_exit_recover: 1091 qedi_ep->state = EP_STATE_IDLE; 1092 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL; 1093 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL; 1094 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port); 1095 qedi_free_sq(qedi, qedi_ep); 1096 1097 if (qedi_conn) 1098 qedi_conn->ep = NULL; 1099 1100 qedi_ep->conn = NULL; 1101 qedi_ep->qedi = NULL; 1102 atomic_dec(&qedi->num_offloads); 1103 1104 iscsi_destroy_endpoint(ep); 1105 } 1106 1107 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid) 1108 { 1109 struct qed_dev *cdev = qedi->cdev; 1110 struct qedi_uio_dev *udev; 1111 struct qedi_uio_ctrl *uctrl; 1112 struct sk_buff *skb; 1113 u32 len; 1114 int rc = 0; 1115 1116 udev = qedi->udev; 1117 if (!udev) { 1118 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n"); 1119 return -EINVAL; 1120 } 1121 1122 uctrl = (struct qedi_uio_ctrl *)udev->uctrl; 1123 if (!uctrl) { 1124 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n"); 1125 return -EINVAL; 1126 } 1127 1128 len = uctrl->host_tx_pkt_len; 1129 if (!len) { 1130 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len); 1131 return -EINVAL; 1132 } 1133 1134 skb = alloc_skb(len, GFP_ATOMIC); 1135 if (!skb) { 1136 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n"); 1137 return -EINVAL; 1138 } 1139 1140 skb_put(skb, len); 1141 memcpy(skb->data, udev->tx_pkt, len); 1142 skb->ip_summed = CHECKSUM_NONE; 1143 1144 if (vlanid) 1145 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); 1146 1147 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0); 1148 if (rc) { 1149 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n", 1150 rc); 1151 kfree_skb(skb); 1152 } 1153 1154 uctrl->host_tx_pkt_len = 0; 1155 uctrl->hw_tx_cons++; 1156 1157 return rc; 1158 } 1159 1160 static void qedi_offload_work(struct work_struct *work) 1161 { 1162 struct qedi_endpoint *qedi_ep = 1163 container_of(work, struct qedi_endpoint, offload_work); 1164 struct qedi_ctx *qedi; 1165 int wait_delay = 20 * HZ; 1166 int ret; 1167 1168 qedi = qedi_ep->qedi; 1169 1170 ret = qedi_iscsi_offload_conn(qedi_ep); 1171 if (ret) { 1172 QEDI_ERR(&qedi->dbg_ctx, 1173 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n", 1174 qedi_ep->iscsi_cid, qedi_ep, ret); 1175 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1176 return; 1177 } 1178 1179 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait, 1180 (qedi_ep->state == 1181 EP_STATE_OFLDCONN_COMPL), 1182 wait_delay); 1183 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) { 1184 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1185 QEDI_ERR(&qedi->dbg_ctx, 1186 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n", 1187 qedi_ep->iscsi_cid, qedi_ep); 1188 } 1189 } 1190 1191 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data) 1192 { 1193 struct qedi_ctx *qedi; 1194 struct qedi_endpoint *qedi_ep; 1195 int ret = 0; 1196 u32 iscsi_cid; 1197 u16 port_id = 0; 1198 1199 if (!shost) { 1200 ret = -ENXIO; 1201 QEDI_ERR(NULL, "shost is NULL\n"); 1202 return ret; 1203 } 1204 1205 if (strcmp(shost->hostt->proc_name, "qedi")) { 1206 ret = -ENXIO; 1207 QEDI_ERR(NULL, "shost %s is invalid\n", 1208 shost->hostt->proc_name); 1209 return ret; 1210 } 1211 1212 qedi = iscsi_host_priv(shost); 1213 if (path_data->handle == QEDI_PATH_HANDLE) { 1214 ret = qedi_data_avail(qedi, path_data->vlan_id); 1215 goto set_path_exit; 1216 } 1217 1218 iscsi_cid = (u32)path_data->handle; 1219 qedi_ep = qedi->ep_tbl[iscsi_cid]; 1220 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1221 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); 1222 if (!qedi_ep) { 1223 ret = -EINVAL; 1224 goto set_path_exit; 1225 } 1226 1227 if (!is_valid_ether_addr(&path_data->mac_addr[0])) { 1228 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n"); 1229 ret = -EIO; 1230 goto set_path_exit; 1231 } 1232 1233 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]); 1234 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]); 1235 1236 qedi_ep->vlan_id = path_data->vlan_id; 1237 if (path_data->pmtu < DEF_PATH_MTU) { 1238 qedi_ep->pmtu = qedi->ll2_mtu; 1239 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1240 "MTU cannot be %u, using default MTU %u\n", 1241 path_data->pmtu, qedi_ep->pmtu); 1242 } 1243 1244 if (path_data->pmtu != qedi->ll2_mtu) { 1245 if (path_data->pmtu > JUMBO_MTU) { 1246 ret = -EINVAL; 1247 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu); 1248 goto set_path_exit; 1249 } 1250 1251 qedi_reset_host_mtu(qedi, path_data->pmtu); 1252 qedi_ep->pmtu = qedi->ll2_mtu; 1253 } 1254 1255 port_id = qedi_ep->src_port; 1256 if (port_id >= QEDI_LOCAL_PORT_MIN && 1257 port_id < QEDI_LOCAL_PORT_MAX) { 1258 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id)) 1259 port_id = 0; 1260 } else { 1261 port_id = 0; 1262 } 1263 1264 if (!port_id) { 1265 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl); 1266 if (port_id == QEDI_LOCAL_PORT_INVALID) { 1267 QEDI_ERR(&qedi->dbg_ctx, 1268 "Failed to allocate port id for iscsi_cid=0x%x\n", 1269 iscsi_cid); 1270 ret = -ENOMEM; 1271 goto set_path_exit; 1272 } 1273 } 1274 1275 qedi_ep->src_port = port_id; 1276 1277 if (qedi_ep->ip_type == TCP_IPV4) { 1278 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr, 1279 sizeof(struct in_addr)); 1280 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr, 1281 sizeof(struct in_addr)); 1282 qedi->ip_type = TCP_IPV4; 1283 1284 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1285 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n", 1286 qedi_ep->src_addr, qedi_ep->src_port, 1287 qedi_ep->dst_addr, qedi_ep->dst_port); 1288 } else { 1289 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr, 1290 sizeof(struct in6_addr)); 1291 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr, 1292 sizeof(struct in6_addr)); 1293 qedi->ip_type = TCP_IPV6; 1294 1295 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1296 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n", 1297 qedi_ep->src_addr, qedi_ep->src_port, 1298 qedi_ep->dst_addr, qedi_ep->dst_port); 1299 } 1300 1301 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work); 1302 queue_work(qedi->offload_thread, &qedi_ep->offload_work); 1303 1304 ret = 0; 1305 1306 set_path_exit: 1307 return ret; 1308 } 1309 1310 static umode_t qedi_attr_is_visible(int param_type, int param) 1311 { 1312 switch (param_type) { 1313 case ISCSI_HOST_PARAM: 1314 switch (param) { 1315 case ISCSI_HOST_PARAM_NETDEV_NAME: 1316 case ISCSI_HOST_PARAM_HWADDRESS: 1317 case ISCSI_HOST_PARAM_IPADDRESS: 1318 return 0444; 1319 default: 1320 return 0; 1321 } 1322 case ISCSI_PARAM: 1323 switch (param) { 1324 case ISCSI_PARAM_MAX_RECV_DLENGTH: 1325 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 1326 case ISCSI_PARAM_HDRDGST_EN: 1327 case ISCSI_PARAM_DATADGST_EN: 1328 case ISCSI_PARAM_CONN_ADDRESS: 1329 case ISCSI_PARAM_CONN_PORT: 1330 case ISCSI_PARAM_EXP_STATSN: 1331 case ISCSI_PARAM_PERSISTENT_ADDRESS: 1332 case ISCSI_PARAM_PERSISTENT_PORT: 1333 case ISCSI_PARAM_PING_TMO: 1334 case ISCSI_PARAM_RECV_TMO: 1335 case ISCSI_PARAM_INITIAL_R2T_EN: 1336 case ISCSI_PARAM_MAX_R2T: 1337 case ISCSI_PARAM_IMM_DATA_EN: 1338 case ISCSI_PARAM_FIRST_BURST: 1339 case ISCSI_PARAM_MAX_BURST: 1340 case ISCSI_PARAM_PDU_INORDER_EN: 1341 case ISCSI_PARAM_DATASEQ_INORDER_EN: 1342 case ISCSI_PARAM_ERL: 1343 case ISCSI_PARAM_TARGET_NAME: 1344 case ISCSI_PARAM_TPGT: 1345 case ISCSI_PARAM_USERNAME: 1346 case ISCSI_PARAM_PASSWORD: 1347 case ISCSI_PARAM_USERNAME_IN: 1348 case ISCSI_PARAM_PASSWORD_IN: 1349 case ISCSI_PARAM_FAST_ABORT: 1350 case ISCSI_PARAM_ABORT_TMO: 1351 case ISCSI_PARAM_LU_RESET_TMO: 1352 case ISCSI_PARAM_TGT_RESET_TMO: 1353 case ISCSI_PARAM_IFACE_NAME: 1354 case ISCSI_PARAM_INITIATOR_NAME: 1355 case ISCSI_PARAM_BOOT_ROOT: 1356 case ISCSI_PARAM_BOOT_NIC: 1357 case ISCSI_PARAM_BOOT_TARGET: 1358 return 0444; 1359 default: 1360 return 0; 1361 } 1362 } 1363 1364 return 0; 1365 } 1366 1367 static void qedi_cleanup_task(struct iscsi_task *task) 1368 { 1369 if (!task->sc || task->state == ISCSI_TASK_PENDING) { 1370 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n", 1371 refcount_read(&task->refcount)); 1372 return; 1373 } 1374 1375 qedi_iscsi_unmap_sg_list(task->dd_data); 1376 } 1377 1378 struct iscsi_transport qedi_iscsi_transport = { 1379 .owner = THIS_MODULE, 1380 .name = QEDI_MODULE_NAME, 1381 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST | 1382 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO, 1383 .create_session = qedi_session_create, 1384 .destroy_session = qedi_session_destroy, 1385 .create_conn = qedi_conn_create, 1386 .bind_conn = qedi_conn_bind, 1387 .start_conn = qedi_conn_start, 1388 .stop_conn = iscsi_conn_stop, 1389 .destroy_conn = qedi_conn_destroy, 1390 .set_param = iscsi_set_param, 1391 .get_ep_param = qedi_ep_get_param, 1392 .get_conn_param = iscsi_conn_get_param, 1393 .get_session_param = iscsi_session_get_param, 1394 .get_host_param = qedi_host_get_param, 1395 .send_pdu = iscsi_conn_send_pdu, 1396 .get_stats = qedi_conn_get_stats, 1397 .xmit_task = qedi_task_xmit, 1398 .cleanup_task = qedi_cleanup_task, 1399 .session_recovery_timedout = iscsi_session_recovery_timedout, 1400 .ep_connect = qedi_ep_connect, 1401 .ep_poll = qedi_ep_poll, 1402 .ep_disconnect = qedi_ep_disconnect, 1403 .set_path = qedi_set_path, 1404 .attr_is_visible = qedi_attr_is_visible, 1405 }; 1406 1407 void qedi_start_conn_recovery(struct qedi_ctx *qedi, 1408 struct qedi_conn *qedi_conn) 1409 { 1410 struct iscsi_cls_session *cls_sess; 1411 struct iscsi_cls_conn *cls_conn; 1412 struct iscsi_conn *conn; 1413 1414 cls_conn = qedi_conn->cls_conn; 1415 conn = cls_conn->dd_data; 1416 cls_sess = iscsi_conn_to_session(cls_conn); 1417 1418 if (iscsi_is_session_online(cls_sess)) { 1419 qedi_conn->abrt_conn = 1; 1420 QEDI_ERR(&qedi->dbg_ctx, 1421 "Failing connection, state=0x%x, cid=0x%x\n", 1422 conn->session->state, qedi_conn->iscsi_conn_id); 1423 iscsi_conn_failure(qedi_conn->cls_conn->dd_data, 1424 ISCSI_ERR_CONN_FAILED); 1425 } 1426 } 1427 1428 static const struct { 1429 enum iscsi_error_types error_code; 1430 char *err_string; 1431 } qedi_iscsi_error[] = { 1432 { ISCSI_STATUS_NONE, 1433 "tcp_error none" 1434 }, 1435 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH, 1436 "task cid mismatch" 1437 }, 1438 { ISCSI_CONN_ERROR_TASK_NOT_VALID, 1439 "invalid task" 1440 }, 1441 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL, 1442 "rq ring full" 1443 }, 1444 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL, 1445 "cmdq ring full" 1446 }, 1447 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED, 1448 "sge caching failed" 1449 }, 1450 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR, 1451 "hdr digest error" 1452 }, 1453 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR, 1454 "local cmpl error" 1455 }, 1456 { ISCSI_CONN_ERROR_DATA_OVERRUN, 1457 "invalid task" 1458 }, 1459 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR, 1460 "out of sge error" 1461 }, 1462 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR, 1463 "tcp ip fragment error" 1464 }, 1465 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN, 1466 "AHS len protocol error" 1467 }, 1468 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE, 1469 "itt out of range error" 1470 }, 1471 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE, 1472 "data seg more than pdu size" 1473 }, 1474 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE, 1475 "invalid opcode" 1476 }, 1477 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE, 1478 "invalid opcode before update" 1479 }, 1480 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL, 1481 "unexpected opcode" 1482 }, 1483 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA, 1484 "r2t carries no data" 1485 }, 1486 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN, 1487 "data sn error" 1488 }, 1489 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT, 1490 "data TTT error" 1491 }, 1492 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT, 1493 "r2t TTT error" 1494 }, 1495 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET, 1496 "buffer offset error" 1497 }, 1498 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO, 1499 "buffer offset ooo" 1500 }, 1501 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN, 1502 "data seg len 0" 1503 }, 1504 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0, 1505 "data xer len error" 1506 }, 1507 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1, 1508 "data xer len1 error" 1509 }, 1510 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2, 1511 "data xer len2 error" 1512 }, 1513 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN, 1514 "protocol lun error" 1515 }, 1516 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO, 1517 "f bit zero error" 1518 }, 1519 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN, 1520 "exp stat sn error" 1521 }, 1522 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO, 1523 "dsl not zero error" 1524 }, 1525 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL, 1526 "invalid dsl" 1527 }, 1528 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG, 1529 "data seg len too big" 1530 }, 1531 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT, 1532 "outstanding r2t count error" 1533 }, 1534 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH, 1535 "sense datalen error" 1536 }, 1537 }; 1538 1539 char *qedi_get_iscsi_error(enum iscsi_error_types err_code) 1540 { 1541 int i; 1542 char *msg = NULL; 1543 1544 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) { 1545 if (qedi_iscsi_error[i].error_code == err_code) { 1546 msg = qedi_iscsi_error[i].err_string; 1547 break; 1548 } 1549 } 1550 return msg; 1551 } 1552 1553 void qedi_process_iscsi_error(struct qedi_endpoint *ep, 1554 struct iscsi_eqe_data *data) 1555 { 1556 struct qedi_conn *qedi_conn; 1557 struct qedi_ctx *qedi; 1558 char warn_notice[] = "iscsi_warning"; 1559 char error_notice[] = "iscsi_error"; 1560 char unknown_msg[] = "Unknown error"; 1561 char *message; 1562 int need_recovery = 0; 1563 u32 err_mask = 0; 1564 char *msg; 1565 1566 if (!ep) 1567 return; 1568 1569 qedi_conn = ep->conn; 1570 if (!qedi_conn) 1571 return; 1572 1573 qedi = ep->qedi; 1574 1575 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n", 1576 data->error_code); 1577 1578 if (err_mask) { 1579 need_recovery = 0; 1580 message = warn_notice; 1581 } else { 1582 need_recovery = 1; 1583 message = error_notice; 1584 } 1585 1586 msg = qedi_get_iscsi_error(data->error_code); 1587 if (!msg) { 1588 need_recovery = 0; 1589 msg = unknown_msg; 1590 } 1591 1592 iscsi_conn_printk(KERN_ALERT, 1593 qedi_conn->cls_conn->dd_data, 1594 "qedi: %s - %s\n", message, msg); 1595 1596 if (need_recovery) 1597 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1598 } 1599 1600 void qedi_process_tcp_error(struct qedi_endpoint *ep, 1601 struct iscsi_eqe_data *data) 1602 { 1603 struct qedi_conn *qedi_conn; 1604 1605 if (!ep) 1606 return; 1607 1608 qedi_conn = ep->conn; 1609 if (!qedi_conn) 1610 return; 1611 1612 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n", 1613 data->error_code); 1614 1615 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1616 } 1617