1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * QLogic iSCSI Offload Driver 4 * Copyright (c) 2016 Cavium Inc. 5 */ 6 7 #include <linux/blkdev.h> 8 #include <linux/etherdevice.h> 9 #include <linux/if_ether.h> 10 #include <linux/if_vlan.h> 11 #include <scsi/scsi_tcq.h> 12 13 #include "qedi.h" 14 #include "qedi_iscsi.h" 15 #include "qedi_gbl.h" 16 17 int qedi_recover_all_conns(struct qedi_ctx *qedi) 18 { 19 struct qedi_conn *qedi_conn; 20 int i; 21 22 for (i = 0; i < qedi->max_active_conns; i++) { 23 qedi_conn = qedi_get_conn_from_id(qedi, i); 24 if (!qedi_conn) 25 continue; 26 27 qedi_start_conn_recovery(qedi, qedi_conn); 28 } 29 30 return SUCCESS; 31 } 32 33 static int qedi_eh_host_reset(struct scsi_cmnd *cmd) 34 { 35 struct Scsi_Host *shost = cmd->device->host; 36 struct qedi_ctx *qedi; 37 38 qedi = iscsi_host_priv(shost); 39 40 return qedi_recover_all_conns(qedi); 41 } 42 43 struct scsi_host_template qedi_host_template = { 44 .module = THIS_MODULE, 45 .name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver", 46 .proc_name = QEDI_MODULE_NAME, 47 .queuecommand = iscsi_queuecommand, 48 .eh_timed_out = iscsi_eh_cmd_timed_out, 49 .eh_abort_handler = iscsi_eh_abort, 50 .eh_device_reset_handler = iscsi_eh_device_reset, 51 .eh_target_reset_handler = iscsi_eh_recover_target, 52 .eh_host_reset_handler = qedi_eh_host_reset, 53 .target_alloc = iscsi_target_alloc, 54 .change_queue_depth = scsi_change_queue_depth, 55 .can_queue = QEDI_MAX_ISCSI_TASK, 56 .this_id = -1, 57 .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD, 58 .max_sectors = 0xffff, 59 .dma_boundary = QEDI_HW_DMA_BOUNDARY, 60 .cmd_per_lun = 128, 61 .shost_attrs = qedi_shost_attrs, 62 }; 63 64 static void qedi_conn_free_login_resources(struct qedi_ctx *qedi, 65 struct qedi_conn *qedi_conn) 66 { 67 if (qedi_conn->gen_pdu.resp_bd_tbl) { 68 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 69 qedi_conn->gen_pdu.resp_bd_tbl, 70 qedi_conn->gen_pdu.resp_bd_dma); 71 qedi_conn->gen_pdu.resp_bd_tbl = NULL; 72 } 73 74 if (qedi_conn->gen_pdu.req_bd_tbl) { 75 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 76 qedi_conn->gen_pdu.req_bd_tbl, 77 qedi_conn->gen_pdu.req_bd_dma); 78 qedi_conn->gen_pdu.req_bd_tbl = NULL; 79 } 80 81 if (qedi_conn->gen_pdu.resp_buf) { 82 dma_free_coherent(&qedi->pdev->dev, 83 ISCSI_DEF_MAX_RECV_SEG_LEN, 84 qedi_conn->gen_pdu.resp_buf, 85 qedi_conn->gen_pdu.resp_dma_addr); 86 qedi_conn->gen_pdu.resp_buf = NULL; 87 } 88 89 if (qedi_conn->gen_pdu.req_buf) { 90 dma_free_coherent(&qedi->pdev->dev, 91 ISCSI_DEF_MAX_RECV_SEG_LEN, 92 qedi_conn->gen_pdu.req_buf, 93 qedi_conn->gen_pdu.req_dma_addr); 94 qedi_conn->gen_pdu.req_buf = NULL; 95 } 96 } 97 98 static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi, 99 struct qedi_conn *qedi_conn) 100 { 101 qedi_conn->gen_pdu.req_buf = 102 dma_alloc_coherent(&qedi->pdev->dev, 103 ISCSI_DEF_MAX_RECV_SEG_LEN, 104 &qedi_conn->gen_pdu.req_dma_addr, 105 GFP_KERNEL); 106 if (!qedi_conn->gen_pdu.req_buf) 107 goto login_req_buf_failure; 108 109 qedi_conn->gen_pdu.req_buf_size = 0; 110 qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf; 111 112 qedi_conn->gen_pdu.resp_buf = 113 dma_alloc_coherent(&qedi->pdev->dev, 114 ISCSI_DEF_MAX_RECV_SEG_LEN, 115 &qedi_conn->gen_pdu.resp_dma_addr, 116 GFP_KERNEL); 117 if (!qedi_conn->gen_pdu.resp_buf) 118 goto login_resp_buf_failure; 119 120 qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; 121 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf; 122 123 qedi_conn->gen_pdu.req_bd_tbl = 124 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 125 &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL); 126 if (!qedi_conn->gen_pdu.req_bd_tbl) 127 goto login_req_bd_tbl_failure; 128 129 qedi_conn->gen_pdu.resp_bd_tbl = 130 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 131 &qedi_conn->gen_pdu.resp_bd_dma, 132 GFP_KERNEL); 133 if (!qedi_conn->gen_pdu.resp_bd_tbl) 134 goto login_resp_bd_tbl_failure; 135 136 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS, 137 "Allocation successful, cid=0x%x\n", 138 qedi_conn->iscsi_conn_id); 139 return 0; 140 141 login_resp_bd_tbl_failure: 142 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE, 143 qedi_conn->gen_pdu.req_bd_tbl, 144 qedi_conn->gen_pdu.req_bd_dma); 145 qedi_conn->gen_pdu.req_bd_tbl = NULL; 146 147 login_req_bd_tbl_failure: 148 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 149 qedi_conn->gen_pdu.resp_buf, 150 qedi_conn->gen_pdu.resp_dma_addr); 151 qedi_conn->gen_pdu.resp_buf = NULL; 152 login_resp_buf_failure: 153 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, 154 qedi_conn->gen_pdu.req_buf, 155 qedi_conn->gen_pdu.req_dma_addr); 156 qedi_conn->gen_pdu.req_buf = NULL; 157 login_req_buf_failure: 158 iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data, 159 "login resource alloc failed!!\n"); 160 return -ENOMEM; 161 } 162 163 static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi, 164 struct iscsi_session *session) 165 { 166 int i; 167 168 for (i = 0; i < session->cmds_max; i++) { 169 struct iscsi_task *task = session->cmds[i]; 170 struct qedi_cmd *cmd = task->dd_data; 171 172 if (cmd->io_tbl.sge_tbl) 173 dma_free_coherent(&qedi->pdev->dev, 174 QEDI_ISCSI_MAX_BDS_PER_CMD * 175 sizeof(struct scsi_sge), 176 cmd->io_tbl.sge_tbl, 177 cmd->io_tbl.sge_tbl_dma); 178 179 if (cmd->sense_buffer) 180 dma_free_coherent(&qedi->pdev->dev, 181 SCSI_SENSE_BUFFERSIZE, 182 cmd->sense_buffer, 183 cmd->sense_buffer_dma); 184 } 185 } 186 187 static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session, 188 struct qedi_cmd *cmd) 189 { 190 struct qedi_io_bdt *io = &cmd->io_tbl; 191 struct scsi_sge *sge; 192 193 io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev, 194 QEDI_ISCSI_MAX_BDS_PER_CMD * 195 sizeof(*sge), 196 &io->sge_tbl_dma, GFP_KERNEL); 197 if (!io->sge_tbl) { 198 iscsi_session_printk(KERN_ERR, session, 199 "Could not allocate BD table.\n"); 200 return -ENOMEM; 201 } 202 203 io->sge_valid = 0; 204 return 0; 205 } 206 207 static int qedi_setup_cmd_pool(struct qedi_ctx *qedi, 208 struct iscsi_session *session) 209 { 210 int i; 211 212 for (i = 0; i < session->cmds_max; i++) { 213 struct iscsi_task *task = session->cmds[i]; 214 struct qedi_cmd *cmd = task->dd_data; 215 216 task->hdr = &cmd->hdr; 217 task->hdr_max = sizeof(struct iscsi_hdr); 218 219 if (qedi_alloc_sget(qedi, session, cmd)) 220 goto free_sgets; 221 222 cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev, 223 SCSI_SENSE_BUFFERSIZE, 224 &cmd->sense_buffer_dma, 225 GFP_KERNEL); 226 if (!cmd->sense_buffer) 227 goto free_sgets; 228 } 229 230 return 0; 231 232 free_sgets: 233 qedi_destroy_cmd_pool(qedi, session); 234 return -ENOMEM; 235 } 236 237 static struct iscsi_cls_session * 238 qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max, 239 u16 qdepth, uint32_t initial_cmdsn) 240 { 241 struct Scsi_Host *shost; 242 struct iscsi_cls_session *cls_session; 243 struct qedi_ctx *qedi; 244 struct qedi_endpoint *qedi_ep; 245 246 if (!ep) 247 return NULL; 248 249 qedi_ep = ep->dd_data; 250 shost = qedi_ep->qedi->shost; 251 qedi = iscsi_host_priv(shost); 252 253 if (cmds_max > qedi->max_sqes) 254 cmds_max = qedi->max_sqes; 255 else if (cmds_max < QEDI_SQ_WQES_MIN) 256 cmds_max = QEDI_SQ_WQES_MIN; 257 258 cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost, 259 cmds_max, 0, sizeof(struct qedi_cmd), 260 initial_cmdsn, ISCSI_MAX_TARGET); 261 if (!cls_session) { 262 QEDI_ERR(&qedi->dbg_ctx, 263 "Failed to setup session for ep=%p\n", qedi_ep); 264 return NULL; 265 } 266 267 if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) { 268 QEDI_ERR(&qedi->dbg_ctx, 269 "Failed to setup cmd pool for ep=%p\n", qedi_ep); 270 goto session_teardown; 271 } 272 273 return cls_session; 274 275 session_teardown: 276 iscsi_session_teardown(cls_session); 277 return NULL; 278 } 279 280 static void qedi_session_destroy(struct iscsi_cls_session *cls_session) 281 { 282 struct iscsi_session *session = cls_session->dd_data; 283 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 284 struct qedi_ctx *qedi = iscsi_host_priv(shost); 285 286 qedi_destroy_cmd_pool(qedi, session); 287 iscsi_session_teardown(cls_session); 288 } 289 290 static struct iscsi_cls_conn * 291 qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) 292 { 293 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 294 struct qedi_ctx *qedi = iscsi_host_priv(shost); 295 struct iscsi_cls_conn *cls_conn; 296 struct qedi_conn *qedi_conn; 297 struct iscsi_conn *conn; 298 299 cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn), 300 cid); 301 if (!cls_conn) { 302 QEDI_ERR(&qedi->dbg_ctx, 303 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n", 304 cid, cls_session); 305 return NULL; 306 } 307 308 conn = cls_conn->dd_data; 309 qedi_conn = conn->dd_data; 310 qedi_conn->cls_conn = cls_conn; 311 qedi_conn->qedi = qedi; 312 qedi_conn->ep = NULL; 313 qedi_conn->active_cmd_count = 0; 314 INIT_LIST_HEAD(&qedi_conn->active_cmd_list); 315 spin_lock_init(&qedi_conn->list_lock); 316 317 if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) { 318 iscsi_conn_printk(KERN_ALERT, conn, 319 "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n", 320 cid, cls_session); 321 goto free_conn; 322 } 323 324 return cls_conn; 325 326 free_conn: 327 iscsi_conn_teardown(cls_conn); 328 return NULL; 329 } 330 331 void qedi_mark_device_missing(struct iscsi_cls_session *cls_session) 332 { 333 struct iscsi_session *session = cls_session->dd_data; 334 struct qedi_conn *qedi_conn = session->leadconn->dd_data; 335 336 spin_lock_bh(&session->frwd_lock); 337 set_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags); 338 spin_unlock_bh(&session->frwd_lock); 339 } 340 341 void qedi_mark_device_available(struct iscsi_cls_session *cls_session) 342 { 343 struct iscsi_session *session = cls_session->dd_data; 344 struct qedi_conn *qedi_conn = session->leadconn->dd_data; 345 346 spin_lock_bh(&session->frwd_lock); 347 clear_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags); 348 spin_unlock_bh(&session->frwd_lock); 349 } 350 351 static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi, 352 struct qedi_conn *qedi_conn) 353 { 354 u32 iscsi_cid = qedi_conn->iscsi_conn_id; 355 356 if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) { 357 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 358 "conn bind - entry #%d not free\n", 359 iscsi_cid); 360 return -EBUSY; 361 } 362 363 qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn; 364 return 0; 365 } 366 367 struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid) 368 { 369 if (!qedi->cid_que.conn_cid_tbl) { 370 QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n"); 371 return NULL; 372 373 } else if (iscsi_cid >= qedi->max_active_conns) { 374 QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid); 375 return NULL; 376 } 377 return qedi->cid_que.conn_cid_tbl[iscsi_cid]; 378 } 379 380 static int qedi_conn_bind(struct iscsi_cls_session *cls_session, 381 struct iscsi_cls_conn *cls_conn, 382 u64 transport_fd, int is_leading) 383 { 384 struct iscsi_conn *conn = cls_conn->dd_data; 385 struct qedi_conn *qedi_conn = conn->dd_data; 386 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 387 struct qedi_ctx *qedi = iscsi_host_priv(shost); 388 struct qedi_endpoint *qedi_ep; 389 struct iscsi_endpoint *ep; 390 391 ep = iscsi_lookup_endpoint(transport_fd); 392 if (!ep) 393 return -EINVAL; 394 395 qedi_ep = ep->dd_data; 396 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) || 397 (qedi_ep->state == EP_STATE_TCP_RST_RCVD)) 398 return -EINVAL; 399 400 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) 401 return -EINVAL; 402 403 qedi_ep->conn = qedi_conn; 404 qedi_conn->ep = qedi_ep; 405 qedi_conn->iscsi_ep = ep; 406 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid; 407 qedi_conn->fw_cid = qedi_ep->fw_cid; 408 qedi_conn->cmd_cleanup_req = 0; 409 qedi_conn->cmd_cleanup_cmpl = 0; 410 411 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn)) 412 return -EINVAL; 413 414 spin_lock_init(&qedi_conn->tmf_work_lock); 415 INIT_LIST_HEAD(&qedi_conn->tmf_work_list); 416 init_waitqueue_head(&qedi_conn->wait_queue); 417 return 0; 418 } 419 420 static int qedi_iscsi_update_conn(struct qedi_ctx *qedi, 421 struct qedi_conn *qedi_conn) 422 { 423 struct qed_iscsi_params_update *conn_info; 424 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn; 425 struct iscsi_conn *conn = cls_conn->dd_data; 426 struct qedi_endpoint *qedi_ep; 427 int rval; 428 429 qedi_ep = qedi_conn->ep; 430 431 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 432 if (!conn_info) { 433 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n"); 434 return -ENOMEM; 435 } 436 437 conn_info->update_flag = 0; 438 439 if (conn->hdrdgst_en) 440 SET_FIELD(conn_info->update_flag, 441 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true); 442 if (conn->datadgst_en) 443 SET_FIELD(conn_info->update_flag, 444 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true); 445 if (conn->session->initial_r2t_en) 446 SET_FIELD(conn_info->update_flag, 447 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T, 448 true); 449 if (conn->session->imm_data_en) 450 SET_FIELD(conn_info->update_flag, 451 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA, 452 true); 453 454 conn_info->max_seq_size = conn->session->max_burst; 455 conn_info->max_recv_pdu_length = conn->max_recv_dlength; 456 conn_info->max_send_pdu_length = conn->max_xmit_dlength; 457 conn_info->first_seq_length = conn->session->first_burst; 458 conn_info->exp_stat_sn = conn->exp_statsn; 459 460 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle, 461 conn_info); 462 if (rval) { 463 rval = -ENXIO; 464 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n"); 465 } 466 467 kfree(conn_info); 468 return rval; 469 } 470 471 static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en) 472 { 473 u16 mss = 0; 474 u16 hdrs = TCP_HDR_LEN; 475 476 if (is_ipv6) 477 hdrs += IPV6_HDR_LEN; 478 else 479 hdrs += IPV4_HDR_LEN; 480 481 mss = pmtu - hdrs; 482 483 if (!mss) 484 mss = DEF_MSS; 485 486 return mss; 487 } 488 489 static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep) 490 { 491 struct qedi_ctx *qedi = qedi_ep->qedi; 492 struct qed_iscsi_params_offload *conn_info; 493 int rval; 494 int i; 495 496 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 497 if (!conn_info) { 498 QEDI_ERR(&qedi->dbg_ctx, 499 "Failed to allocate memory ep=%p\n", qedi_ep); 500 return -ENOMEM; 501 } 502 503 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac); 504 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac); 505 506 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]); 507 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]); 508 509 if (qedi_ep->ip_type == TCP_IPV4) { 510 conn_info->ip_version = 0; 511 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 512 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n", 513 qedi_ep->src_addr, qedi_ep->dst_addr); 514 } else { 515 for (i = 1; i < 4; i++) { 516 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]); 517 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]); 518 } 519 520 conn_info->ip_version = 1; 521 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 522 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n", 523 qedi_ep->src_addr, qedi_ep->dst_addr); 524 } 525 526 conn_info->src.port = qedi_ep->src_port; 527 conn_info->dst.port = qedi_ep->dst_port; 528 529 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE; 530 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma; 531 conn_info->vlan_id = qedi_ep->vlan_id; 532 533 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1); 534 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1); 535 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1); 536 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1); 537 538 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues); 539 540 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT; 541 conn_info->dup_ack_theshold = 3; 542 conn_info->rcv_wnd = 65535; 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->cwnd = DEF_MAX_CWND * conn_info->mss; 561 conn_info->rcv_wnd_scale = 4; 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 offload 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 offload 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 return qedi_iscsi_send_generic_request(task); 786 } 787 788 static int qedi_task_xmit(struct iscsi_task *task) 789 { 790 struct iscsi_conn *conn = task->conn; 791 struct qedi_conn *qedi_conn = conn->dd_data; 792 struct qedi_cmd *cmd = task->dd_data; 793 struct scsi_cmnd *sc = task->sc; 794 795 /* Clear now so in cleanup_task we know it didn't make it */ 796 cmd->scsi_cmd = NULL; 797 cmd->task_id = U16_MAX; 798 799 if (test_bit(QEDI_IN_SHUTDOWN, &qedi_conn->qedi->flags)) 800 return -ENODEV; 801 802 if (test_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags)) 803 return -EACCES; 804 805 cmd->state = 0; 806 cmd->task = NULL; 807 cmd->use_slowpath = false; 808 cmd->conn = qedi_conn; 809 cmd->task = task; 810 cmd->io_cmd_in_list = false; 811 INIT_LIST_HEAD(&cmd->io_cmd); 812 813 if (!sc) 814 return qedi_mtask_xmit(conn, task); 815 816 cmd->scsi_cmd = sc; 817 return qedi_iscsi_send_ioreq(task); 818 } 819 820 static struct iscsi_endpoint * 821 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 822 int non_blocking) 823 { 824 struct qedi_ctx *qedi; 825 struct iscsi_endpoint *ep; 826 struct qedi_endpoint *qedi_ep; 827 struct sockaddr_in *addr; 828 struct sockaddr_in6 *addr6; 829 struct iscsi_path path_req; 830 u32 msg_type = ISCSI_KEVENT_IF_DOWN; 831 u32 iscsi_cid = QEDI_CID_RESERVED; 832 u16 len = 0; 833 char *buf = NULL; 834 int ret, tmp; 835 836 if (!shost) { 837 ret = -ENXIO; 838 QEDI_ERR(NULL, "shost is NULL\n"); 839 return ERR_PTR(ret); 840 } 841 842 if (qedi_do_not_recover) { 843 ret = -ENOMEM; 844 return ERR_PTR(ret); 845 } 846 847 qedi = iscsi_host_priv(shost); 848 849 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) || 850 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 851 ret = -ENOMEM; 852 return ERR_PTR(ret); 853 } 854 855 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) { 856 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n"); 857 return ERR_PTR(-ENXIO); 858 } 859 860 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint)); 861 if (!ep) { 862 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n"); 863 ret = -ENOMEM; 864 return ERR_PTR(ret); 865 } 866 qedi_ep = ep->dd_data; 867 memset(qedi_ep, 0, sizeof(struct qedi_endpoint)); 868 qedi_ep->state = EP_STATE_IDLE; 869 qedi_ep->iscsi_cid = (u32)-1; 870 qedi_ep->qedi = qedi; 871 872 if (dst_addr->sa_family == AF_INET) { 873 addr = (struct sockaddr_in *)dst_addr; 874 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr, 875 sizeof(struct in_addr)); 876 qedi_ep->dst_port = ntohs(addr->sin_port); 877 qedi_ep->ip_type = TCP_IPV4; 878 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 879 "dst_addr=%pI4, dst_port=%u\n", 880 qedi_ep->dst_addr, qedi_ep->dst_port); 881 } else if (dst_addr->sa_family == AF_INET6) { 882 addr6 = (struct sockaddr_in6 *)dst_addr; 883 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr, 884 sizeof(struct in6_addr)); 885 qedi_ep->dst_port = ntohs(addr6->sin6_port); 886 qedi_ep->ip_type = TCP_IPV6; 887 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 888 "dst_addr=%pI6, dst_port=%u\n", 889 qedi_ep->dst_addr, qedi_ep->dst_port); 890 } else { 891 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n"); 892 } 893 894 ret = qedi_alloc_sq(qedi, qedi_ep); 895 if (ret) 896 goto ep_conn_exit; 897 898 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle, 899 &qedi_ep->fw_cid, &qedi_ep->p_doorbell); 900 901 if (ret) { 902 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n"); 903 ret = -ENXIO; 904 goto ep_free_sq; 905 } 906 907 iscsi_cid = qedi_ep->handle; 908 qedi_ep->iscsi_cid = iscsi_cid; 909 910 init_waitqueue_head(&qedi_ep->ofld_wait); 911 init_waitqueue_head(&qedi_ep->tcp_ofld_wait); 912 qedi_ep->state = EP_STATE_OFLDCONN_START; 913 qedi->ep_tbl[iscsi_cid] = qedi_ep; 914 915 buf = (char *)&path_req; 916 len = sizeof(path_req); 917 memset(&path_req, 0, len); 918 919 msg_type = ISCSI_KEVENT_PATH_REQ; 920 path_req.handle = (u64)qedi_ep->iscsi_cid; 921 path_req.pmtu = qedi->ll2_mtu; 922 qedi_ep->pmtu = qedi->ll2_mtu; 923 if (qedi_ep->ip_type == TCP_IPV4) { 924 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr, 925 sizeof(struct in_addr)); 926 path_req.ip_addr_len = 4; 927 } else { 928 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr, 929 sizeof(struct in6_addr)); 930 path_req.ip_addr_len = 16; 931 } 932 933 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf, 934 len); 935 if (ret) { 936 QEDI_ERR(&qedi->dbg_ctx, 937 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n", 938 iscsi_cid, ret); 939 goto ep_rel_conn; 940 } 941 942 atomic_inc(&qedi->num_offloads); 943 return ep; 944 945 ep_rel_conn: 946 qedi->ep_tbl[iscsi_cid] = NULL; 947 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 948 if (tmp) 949 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n", 950 tmp); 951 ep_free_sq: 952 qedi_free_sq(qedi, qedi_ep); 953 ep_conn_exit: 954 iscsi_destroy_endpoint(ep); 955 return ERR_PTR(ret); 956 } 957 958 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 959 { 960 struct qedi_endpoint *qedi_ep; 961 int ret = 0; 962 963 if (qedi_do_not_recover) 964 return 1; 965 966 qedi_ep = ep->dd_data; 967 if (qedi_ep->state == EP_STATE_IDLE || 968 qedi_ep->state == EP_STATE_OFLDCONN_NONE || 969 qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 970 return -1; 971 972 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL) 973 ret = 1; 974 975 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait, 976 QEDI_OFLD_WAIT_STATE(qedi_ep), 977 msecs_to_jiffies(timeout_ms)); 978 979 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 980 ret = -1; 981 982 if (ret > 0) 983 return 1; 984 else if (!ret) 985 return 0; 986 else 987 return ret; 988 } 989 990 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn) 991 { 992 struct qedi_cmd *cmd, *cmd_tmp; 993 994 spin_lock(&qedi_conn->list_lock); 995 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list, 996 io_cmd) { 997 list_del_init(&cmd->io_cmd); 998 qedi_conn->active_cmd_count--; 999 } 1000 spin_unlock(&qedi_conn->list_lock); 1001 } 1002 1003 static void qedi_ep_disconnect(struct iscsi_endpoint *ep) 1004 { 1005 struct qedi_endpoint *qedi_ep; 1006 struct qedi_conn *qedi_conn = NULL; 1007 struct iscsi_conn *conn = NULL; 1008 struct qedi_ctx *qedi; 1009 int ret = 0; 1010 int wait_delay; 1011 int abrt_conn = 0; 1012 int count = 10; 1013 1014 wait_delay = 60 * HZ + DEF_MAX_RT_TIME; 1015 qedi_ep = ep->dd_data; 1016 qedi = qedi_ep->qedi; 1017 1018 if (qedi_ep->state == EP_STATE_OFLDCONN_START) 1019 goto ep_exit_recover; 1020 1021 if (qedi_ep->state != EP_STATE_OFLDCONN_NONE) 1022 flush_work(&qedi_ep->offload_work); 1023 1024 if (qedi_ep->conn) { 1025 qedi_conn = qedi_ep->conn; 1026 conn = qedi_conn->cls_conn->dd_data; 1027 iscsi_suspend_queue(conn); 1028 abrt_conn = qedi_conn->abrt_conn; 1029 1030 while (count--) { 1031 if (!test_bit(QEDI_CONN_FW_CLEANUP, 1032 &qedi_conn->flags)) { 1033 break; 1034 } 1035 msleep(1000); 1036 } 1037 1038 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 1039 if (qedi_do_not_recover) { 1040 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1041 "Do not recover cid=0x%x\n", 1042 qedi_ep->iscsi_cid); 1043 goto ep_exit_recover; 1044 } 1045 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1046 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n", 1047 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state); 1048 qedi_cleanup_active_cmd_list(qedi_conn); 1049 goto ep_release_conn; 1050 } 1051 } 1052 1053 if (qedi_do_not_recover) 1054 goto ep_exit_recover; 1055 1056 switch (qedi_ep->state) { 1057 case EP_STATE_OFLDCONN_START: 1058 case EP_STATE_OFLDCONN_NONE: 1059 goto ep_release_conn; 1060 case EP_STATE_OFLDCONN_FAILED: 1061 break; 1062 case EP_STATE_OFLDCONN_COMPL: 1063 if (unlikely(!qedi_conn)) 1064 break; 1065 1066 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1067 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n", 1068 qedi_conn->active_cmd_count, abrt_conn, 1069 qedi_ep->state, 1070 qedi_ep->iscsi_cid, 1071 qedi_ep->conn 1072 ); 1073 1074 if (!qedi_conn->active_cmd_count) 1075 abrt_conn = 0; 1076 else 1077 abrt_conn = 1; 1078 1079 if (abrt_conn) 1080 qedi_clearsq(qedi, qedi_conn, NULL); 1081 break; 1082 default: 1083 break; 1084 } 1085 1086 if (!abrt_conn) 1087 wait_delay += qedi->pf_params.iscsi_pf_params.two_msl_timer; 1088 1089 qedi_ep->state = EP_STATE_DISCONN_START; 1090 1091 if (test_bit(QEDI_IN_SHUTDOWN, &qedi->flags) || 1092 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) 1093 goto ep_release_conn; 1094 1095 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn); 1096 if (ret) { 1097 QEDI_WARN(&qedi->dbg_ctx, 1098 "destroy_conn failed returned %d\n", ret); 1099 } else { 1100 ret = wait_event_interruptible_timeout( 1101 qedi_ep->tcp_ofld_wait, 1102 (qedi_ep->state != 1103 EP_STATE_DISCONN_START), 1104 wait_delay); 1105 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) { 1106 QEDI_WARN(&qedi->dbg_ctx, 1107 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n", 1108 ret, wait_delay, qedi_ep->iscsi_cid); 1109 } 1110 } 1111 1112 ep_release_conn: 1113 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 1114 if (ret) 1115 QEDI_WARN(&qedi->dbg_ctx, 1116 "release_conn returned %d, cid=0x%x\n", 1117 ret, qedi_ep->iscsi_cid); 1118 ep_exit_recover: 1119 qedi_ep->state = EP_STATE_IDLE; 1120 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL; 1121 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL; 1122 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port); 1123 qedi_free_sq(qedi, qedi_ep); 1124 1125 if (qedi_conn) 1126 qedi_conn->ep = NULL; 1127 1128 qedi_ep->conn = NULL; 1129 qedi_ep->qedi = NULL; 1130 atomic_dec(&qedi->num_offloads); 1131 1132 iscsi_destroy_endpoint(ep); 1133 } 1134 1135 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid) 1136 { 1137 struct qed_dev *cdev = qedi->cdev; 1138 struct qedi_uio_dev *udev; 1139 struct qedi_uio_ctrl *uctrl; 1140 struct sk_buff *skb; 1141 u32 len; 1142 int rc = 0; 1143 1144 udev = qedi->udev; 1145 if (!udev) { 1146 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n"); 1147 return -EINVAL; 1148 } 1149 1150 uctrl = (struct qedi_uio_ctrl *)udev->uctrl; 1151 if (!uctrl) { 1152 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n"); 1153 return -EINVAL; 1154 } 1155 1156 len = uctrl->host_tx_pkt_len; 1157 if (!len) { 1158 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len); 1159 return -EINVAL; 1160 } 1161 1162 skb = alloc_skb(len, GFP_ATOMIC); 1163 if (!skb) { 1164 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n"); 1165 return -EINVAL; 1166 } 1167 1168 skb_put(skb, len); 1169 memcpy(skb->data, udev->tx_pkt, len); 1170 skb->ip_summed = CHECKSUM_NONE; 1171 1172 if (vlanid) 1173 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); 1174 1175 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0); 1176 if (rc) { 1177 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n", 1178 rc); 1179 kfree_skb(skb); 1180 } 1181 1182 uctrl->host_tx_pkt_len = 0; 1183 uctrl->hw_tx_cons++; 1184 1185 return rc; 1186 } 1187 1188 static void qedi_offload_work(struct work_struct *work) 1189 { 1190 struct qedi_endpoint *qedi_ep = 1191 container_of(work, struct qedi_endpoint, offload_work); 1192 struct qedi_ctx *qedi; 1193 int wait_delay = 5 * HZ; 1194 int ret; 1195 1196 qedi = qedi_ep->qedi; 1197 1198 ret = qedi_iscsi_offload_conn(qedi_ep); 1199 if (ret) { 1200 QEDI_ERR(&qedi->dbg_ctx, 1201 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n", 1202 qedi_ep->iscsi_cid, qedi_ep, ret); 1203 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1204 return; 1205 } 1206 1207 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait, 1208 (qedi_ep->state == 1209 EP_STATE_OFLDCONN_COMPL), 1210 wait_delay); 1211 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) { 1212 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 1213 QEDI_ERR(&qedi->dbg_ctx, 1214 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n", 1215 qedi_ep->iscsi_cid, qedi_ep); 1216 } 1217 } 1218 1219 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data) 1220 { 1221 struct qedi_ctx *qedi; 1222 struct qedi_endpoint *qedi_ep; 1223 int ret = 0; 1224 u32 iscsi_cid; 1225 u16 port_id = 0; 1226 1227 if (!shost) { 1228 ret = -ENXIO; 1229 QEDI_ERR(NULL, "shost is NULL\n"); 1230 return ret; 1231 } 1232 1233 if (strcmp(shost->hostt->proc_name, "qedi")) { 1234 ret = -ENXIO; 1235 QEDI_ERR(NULL, "shost %s is invalid\n", 1236 shost->hostt->proc_name); 1237 return ret; 1238 } 1239 1240 qedi = iscsi_host_priv(shost); 1241 if (path_data->handle == QEDI_PATH_HANDLE) { 1242 ret = qedi_data_avail(qedi, path_data->vlan_id); 1243 goto set_path_exit; 1244 } 1245 1246 iscsi_cid = (u32)path_data->handle; 1247 if (iscsi_cid >= qedi->max_active_conns) { 1248 ret = -EINVAL; 1249 goto set_path_exit; 1250 } 1251 qedi_ep = qedi->ep_tbl[iscsi_cid]; 1252 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1253 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); 1254 if (!qedi_ep) { 1255 ret = -EINVAL; 1256 goto set_path_exit; 1257 } 1258 1259 if (!is_valid_ether_addr(&path_data->mac_addr[0])) { 1260 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n"); 1261 qedi_ep->state = EP_STATE_OFLDCONN_NONE; 1262 ret = -EIO; 1263 goto set_path_exit; 1264 } 1265 1266 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]); 1267 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]); 1268 1269 qedi_ep->vlan_id = path_data->vlan_id; 1270 if (path_data->pmtu < DEF_PATH_MTU) { 1271 qedi_ep->pmtu = qedi->ll2_mtu; 1272 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1273 "MTU cannot be %u, using default MTU %u\n", 1274 path_data->pmtu, qedi_ep->pmtu); 1275 } 1276 1277 if (path_data->pmtu != qedi->ll2_mtu) { 1278 if (path_data->pmtu > JUMBO_MTU) { 1279 ret = -EINVAL; 1280 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu); 1281 goto set_path_exit; 1282 } 1283 1284 qedi_reset_host_mtu(qedi, path_data->pmtu); 1285 qedi_ep->pmtu = qedi->ll2_mtu; 1286 } 1287 1288 port_id = qedi_ep->src_port; 1289 if (port_id >= QEDI_LOCAL_PORT_MIN && 1290 port_id < QEDI_LOCAL_PORT_MAX) { 1291 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id)) 1292 port_id = 0; 1293 } else { 1294 port_id = 0; 1295 } 1296 1297 if (!port_id) { 1298 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl); 1299 if (port_id == QEDI_LOCAL_PORT_INVALID) { 1300 QEDI_ERR(&qedi->dbg_ctx, 1301 "Failed to allocate port id for iscsi_cid=0x%x\n", 1302 iscsi_cid); 1303 ret = -ENOMEM; 1304 goto set_path_exit; 1305 } 1306 } 1307 1308 qedi_ep->src_port = port_id; 1309 1310 if (qedi_ep->ip_type == TCP_IPV4) { 1311 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr, 1312 sizeof(struct in_addr)); 1313 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr, 1314 sizeof(struct in_addr)); 1315 qedi->ip_type = TCP_IPV4; 1316 1317 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1318 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n", 1319 qedi_ep->src_addr, qedi_ep->src_port, 1320 qedi_ep->dst_addr, qedi_ep->dst_port); 1321 } else { 1322 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr, 1323 sizeof(struct in6_addr)); 1324 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr, 1325 sizeof(struct in6_addr)); 1326 qedi->ip_type = TCP_IPV6; 1327 1328 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1329 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n", 1330 qedi_ep->src_addr, qedi_ep->src_port, 1331 qedi_ep->dst_addr, qedi_ep->dst_port); 1332 } 1333 1334 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work); 1335 queue_work(qedi->offload_thread, &qedi_ep->offload_work); 1336 1337 ret = 0; 1338 1339 set_path_exit: 1340 return ret; 1341 } 1342 1343 static umode_t qedi_attr_is_visible(int param_type, int param) 1344 { 1345 switch (param_type) { 1346 case ISCSI_HOST_PARAM: 1347 switch (param) { 1348 case ISCSI_HOST_PARAM_NETDEV_NAME: 1349 case ISCSI_HOST_PARAM_HWADDRESS: 1350 case ISCSI_HOST_PARAM_IPADDRESS: 1351 return 0444; 1352 default: 1353 return 0; 1354 } 1355 case ISCSI_PARAM: 1356 switch (param) { 1357 case ISCSI_PARAM_MAX_RECV_DLENGTH: 1358 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 1359 case ISCSI_PARAM_HDRDGST_EN: 1360 case ISCSI_PARAM_DATADGST_EN: 1361 case ISCSI_PARAM_CONN_ADDRESS: 1362 case ISCSI_PARAM_CONN_PORT: 1363 case ISCSI_PARAM_EXP_STATSN: 1364 case ISCSI_PARAM_PERSISTENT_ADDRESS: 1365 case ISCSI_PARAM_PERSISTENT_PORT: 1366 case ISCSI_PARAM_PING_TMO: 1367 case ISCSI_PARAM_RECV_TMO: 1368 case ISCSI_PARAM_INITIAL_R2T_EN: 1369 case ISCSI_PARAM_MAX_R2T: 1370 case ISCSI_PARAM_IMM_DATA_EN: 1371 case ISCSI_PARAM_FIRST_BURST: 1372 case ISCSI_PARAM_MAX_BURST: 1373 case ISCSI_PARAM_PDU_INORDER_EN: 1374 case ISCSI_PARAM_DATASEQ_INORDER_EN: 1375 case ISCSI_PARAM_ERL: 1376 case ISCSI_PARAM_TARGET_NAME: 1377 case ISCSI_PARAM_TPGT: 1378 case ISCSI_PARAM_USERNAME: 1379 case ISCSI_PARAM_PASSWORD: 1380 case ISCSI_PARAM_USERNAME_IN: 1381 case ISCSI_PARAM_PASSWORD_IN: 1382 case ISCSI_PARAM_FAST_ABORT: 1383 case ISCSI_PARAM_ABORT_TMO: 1384 case ISCSI_PARAM_LU_RESET_TMO: 1385 case ISCSI_PARAM_TGT_RESET_TMO: 1386 case ISCSI_PARAM_IFACE_NAME: 1387 case ISCSI_PARAM_INITIATOR_NAME: 1388 case ISCSI_PARAM_BOOT_ROOT: 1389 case ISCSI_PARAM_BOOT_NIC: 1390 case ISCSI_PARAM_BOOT_TARGET: 1391 return 0444; 1392 default: 1393 return 0; 1394 } 1395 } 1396 1397 return 0; 1398 } 1399 1400 static void qedi_cleanup_task(struct iscsi_task *task) 1401 { 1402 struct qedi_cmd *cmd; 1403 1404 if (task->state == ISCSI_TASK_PENDING) { 1405 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n", 1406 refcount_read(&task->refcount)); 1407 return; 1408 } 1409 1410 if (task->sc) 1411 qedi_iscsi_unmap_sg_list(task->dd_data); 1412 1413 cmd = task->dd_data; 1414 if (cmd->task_id != U16_MAX) 1415 qedi_clear_task_idx(iscsi_host_priv(task->conn->session->host), 1416 cmd->task_id); 1417 1418 cmd->task_id = U16_MAX; 1419 cmd->scsi_cmd = NULL; 1420 } 1421 1422 struct iscsi_transport qedi_iscsi_transport = { 1423 .owner = THIS_MODULE, 1424 .name = QEDI_MODULE_NAME, 1425 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST | 1426 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO, 1427 .create_session = qedi_session_create, 1428 .destroy_session = qedi_session_destroy, 1429 .create_conn = qedi_conn_create, 1430 .bind_conn = qedi_conn_bind, 1431 .start_conn = qedi_conn_start, 1432 .stop_conn = iscsi_conn_stop, 1433 .destroy_conn = qedi_conn_destroy, 1434 .set_param = iscsi_set_param, 1435 .get_ep_param = qedi_ep_get_param, 1436 .get_conn_param = iscsi_conn_get_param, 1437 .get_session_param = iscsi_session_get_param, 1438 .get_host_param = qedi_host_get_param, 1439 .send_pdu = iscsi_conn_send_pdu, 1440 .get_stats = qedi_conn_get_stats, 1441 .xmit_task = qedi_task_xmit, 1442 .cleanup_task = qedi_cleanup_task, 1443 .session_recovery_timedout = iscsi_session_recovery_timedout, 1444 .ep_connect = qedi_ep_connect, 1445 .ep_poll = qedi_ep_poll, 1446 .ep_disconnect = qedi_ep_disconnect, 1447 .set_path = qedi_set_path, 1448 .attr_is_visible = qedi_attr_is_visible, 1449 }; 1450 1451 void qedi_start_conn_recovery(struct qedi_ctx *qedi, 1452 struct qedi_conn *qedi_conn) 1453 { 1454 struct iscsi_cls_session *cls_sess; 1455 struct iscsi_cls_conn *cls_conn; 1456 struct iscsi_conn *conn; 1457 1458 cls_conn = qedi_conn->cls_conn; 1459 conn = cls_conn->dd_data; 1460 cls_sess = iscsi_conn_to_session(cls_conn); 1461 1462 if (iscsi_is_session_online(cls_sess)) { 1463 qedi_conn->abrt_conn = 1; 1464 QEDI_ERR(&qedi->dbg_ctx, 1465 "Failing connection, state=0x%x, cid=0x%x\n", 1466 conn->session->state, qedi_conn->iscsi_conn_id); 1467 iscsi_conn_failure(qedi_conn->cls_conn->dd_data, 1468 ISCSI_ERR_CONN_FAILED); 1469 } 1470 } 1471 1472 static const struct { 1473 enum iscsi_error_types error_code; 1474 char *err_string; 1475 } qedi_iscsi_error[] = { 1476 { ISCSI_STATUS_NONE, 1477 "tcp_error none" 1478 }, 1479 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH, 1480 "task cid mismatch" 1481 }, 1482 { ISCSI_CONN_ERROR_TASK_NOT_VALID, 1483 "invalid task" 1484 }, 1485 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL, 1486 "rq ring full" 1487 }, 1488 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL, 1489 "cmdq ring full" 1490 }, 1491 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED, 1492 "sge caching failed" 1493 }, 1494 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR, 1495 "hdr digest error" 1496 }, 1497 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR, 1498 "local cmpl error" 1499 }, 1500 { ISCSI_CONN_ERROR_DATA_OVERRUN, 1501 "invalid task" 1502 }, 1503 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR, 1504 "out of sge error" 1505 }, 1506 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR, 1507 "tcp ip fragment error" 1508 }, 1509 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN, 1510 "AHS len protocol error" 1511 }, 1512 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE, 1513 "itt out of range error" 1514 }, 1515 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE, 1516 "data seg more than pdu size" 1517 }, 1518 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE, 1519 "invalid opcode" 1520 }, 1521 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE, 1522 "invalid opcode before update" 1523 }, 1524 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL, 1525 "unexpected opcode" 1526 }, 1527 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA, 1528 "r2t carries no data" 1529 }, 1530 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN, 1531 "data sn error" 1532 }, 1533 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT, 1534 "data TTT error" 1535 }, 1536 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT, 1537 "r2t TTT error" 1538 }, 1539 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET, 1540 "buffer offset error" 1541 }, 1542 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO, 1543 "buffer offset ooo" 1544 }, 1545 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN, 1546 "data seg len 0" 1547 }, 1548 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0, 1549 "data xer len error" 1550 }, 1551 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1, 1552 "data xer len1 error" 1553 }, 1554 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2, 1555 "data xer len2 error" 1556 }, 1557 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN, 1558 "protocol lun error" 1559 }, 1560 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO, 1561 "f bit zero error" 1562 }, 1563 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN, 1564 "exp stat sn error" 1565 }, 1566 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO, 1567 "dsl not zero error" 1568 }, 1569 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL, 1570 "invalid dsl" 1571 }, 1572 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG, 1573 "data seg len too big" 1574 }, 1575 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT, 1576 "outstanding r2t count error" 1577 }, 1578 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH, 1579 "sense datalen error" 1580 }, 1581 }; 1582 1583 static char *qedi_get_iscsi_error(enum iscsi_error_types err_code) 1584 { 1585 int i; 1586 char *msg = NULL; 1587 1588 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) { 1589 if (qedi_iscsi_error[i].error_code == err_code) { 1590 msg = qedi_iscsi_error[i].err_string; 1591 break; 1592 } 1593 } 1594 return msg; 1595 } 1596 1597 void qedi_process_iscsi_error(struct qedi_endpoint *ep, 1598 struct iscsi_eqe_data *data) 1599 { 1600 struct qedi_conn *qedi_conn; 1601 struct qedi_ctx *qedi; 1602 char warn_notice[] = "iscsi_warning"; 1603 char error_notice[] = "iscsi_error"; 1604 char unknown_msg[] = "Unknown error"; 1605 char *message; 1606 int need_recovery = 0; 1607 u32 err_mask = 0; 1608 char *msg; 1609 1610 if (!ep) 1611 return; 1612 1613 qedi_conn = ep->conn; 1614 if (!qedi_conn) 1615 return; 1616 1617 qedi = ep->qedi; 1618 1619 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n", 1620 data->error_code); 1621 1622 if (err_mask) { 1623 need_recovery = 0; 1624 message = warn_notice; 1625 } else { 1626 need_recovery = 1; 1627 message = error_notice; 1628 } 1629 1630 msg = qedi_get_iscsi_error(data->error_code); 1631 if (!msg) { 1632 need_recovery = 0; 1633 msg = unknown_msg; 1634 } 1635 1636 iscsi_conn_printk(KERN_ALERT, 1637 qedi_conn->cls_conn->dd_data, 1638 "qedi: %s - %s\n", message, msg); 1639 1640 if (need_recovery) 1641 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1642 } 1643 1644 void qedi_clear_session_ctx(struct iscsi_cls_session *cls_sess) 1645 { 1646 struct iscsi_session *session = cls_sess->dd_data; 1647 struct iscsi_conn *conn = session->leadconn; 1648 struct qedi_conn *qedi_conn = conn->dd_data; 1649 1650 if (iscsi_is_session_online(cls_sess)) 1651 qedi_ep_disconnect(qedi_conn->iscsi_ep); 1652 1653 qedi_conn_destroy(qedi_conn->cls_conn); 1654 1655 qedi_session_destroy(cls_sess); 1656 } 1657 1658 void qedi_process_tcp_error(struct qedi_endpoint *ep, 1659 struct iscsi_eqe_data *data) 1660 { 1661 struct qedi_conn *qedi_conn; 1662 1663 if (!ep) 1664 return; 1665 1666 qedi_conn = ep->conn; 1667 if (!qedi_conn) 1668 return; 1669 1670 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n", 1671 data->error_code); 1672 1673 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1674 } 1675