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