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 17int 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 33static 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 43struct 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 64static 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 98static 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 141login_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 147login_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; 152login_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; 157login_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 163static 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 187static 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 207static 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 232free_sgets: 233 qedi_destroy_cmd_pool(qedi, session); 234 return -ENOMEM; 235} 236 237static struct iscsi_cls_session * 238qedi_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 275session_teardown: 276 iscsi_session_teardown(cls_session); 277 return NULL; 278} 279 280static 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 290static struct iscsi_cls_conn * 291qedi_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 326free_conn: 327 iscsi_conn_teardown(cls_conn); 328 return NULL; 329} 330 331void 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 341void 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 351static 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 367struct 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 380static int qedi_conn_bind(struct iscsi_cls_session *cls_session, 381 struct iscsi_cls_conn *cls_conn, 382 u64 transport_fd, int is_leading) 383{ 384 struct iscsi_conn *conn = cls_conn->dd_data; 385 struct qedi_conn *qedi_conn = conn->dd_data; 386 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 387 struct qedi_ctx *qedi = iscsi_host_priv(shost); 388 struct qedi_endpoint *qedi_ep; 389 struct iscsi_endpoint *ep; 390 int rc = 0; 391 392 ep = iscsi_lookup_endpoint(transport_fd); 393 if (!ep) 394 return -EINVAL; 395 396 qedi_ep = ep->dd_data; 397 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) || 398 (qedi_ep->state == EP_STATE_TCP_RST_RCVD)) { 399 rc = -EINVAL; 400 goto put_ep; 401 } 402 403 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) { 404 rc = -EINVAL; 405 goto put_ep; 406 } 407 408 409 qedi_ep->conn = qedi_conn; 410 qedi_conn->ep = qedi_ep; 411 qedi_conn->iscsi_ep = ep; 412 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid; 413 qedi_conn->fw_cid = qedi_ep->fw_cid; 414 qedi_conn->cmd_cleanup_req = 0; 415 qedi_conn->cmd_cleanup_cmpl = 0; 416 417 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn)) { 418 rc = -EINVAL; 419 goto put_ep; 420 } 421 422 423 spin_lock_init(&qedi_conn->tmf_work_lock); 424 INIT_LIST_HEAD(&qedi_conn->tmf_work_list); 425 init_waitqueue_head(&qedi_conn->wait_queue); 426put_ep: 427 iscsi_put_endpoint(ep); 428 return rc; 429} 430 431static int qedi_iscsi_update_conn(struct qedi_ctx *qedi, 432 struct qedi_conn *qedi_conn) 433{ 434 struct qed_iscsi_params_update *conn_info; 435 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn; 436 struct iscsi_conn *conn = cls_conn->dd_data; 437 struct qedi_endpoint *qedi_ep; 438 int rval; 439 440 qedi_ep = qedi_conn->ep; 441 442 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 443 if (!conn_info) { 444 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n"); 445 return -ENOMEM; 446 } 447 448 conn_info->update_flag = 0; 449 450 if (conn->hdrdgst_en) 451 SET_FIELD(conn_info->update_flag, 452 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true); 453 if (conn->datadgst_en) 454 SET_FIELD(conn_info->update_flag, 455 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true); 456 if (conn->session->initial_r2t_en) 457 SET_FIELD(conn_info->update_flag, 458 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T, 459 true); 460 if (conn->session->imm_data_en) 461 SET_FIELD(conn_info->update_flag, 462 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA, 463 true); 464 465 conn_info->max_seq_size = conn->session->max_burst; 466 conn_info->max_recv_pdu_length = conn->max_recv_dlength; 467 conn_info->max_send_pdu_length = conn->max_xmit_dlength; 468 conn_info->first_seq_length = conn->session->first_burst; 469 conn_info->exp_stat_sn = conn->exp_statsn; 470 471 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle, 472 conn_info); 473 if (rval) { 474 rval = -ENXIO; 475 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n"); 476 } 477 478 kfree(conn_info); 479 return rval; 480} 481 482static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en) 483{ 484 u16 mss = 0; 485 u16 hdrs = TCP_HDR_LEN; 486 487 if (is_ipv6) 488 hdrs += IPV6_HDR_LEN; 489 else 490 hdrs += IPV4_HDR_LEN; 491 492 mss = pmtu - hdrs; 493 494 if (!mss) 495 mss = DEF_MSS; 496 497 return mss; 498} 499 500static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep) 501{ 502 struct qedi_ctx *qedi = qedi_ep->qedi; 503 struct qed_iscsi_params_offload *conn_info; 504 int rval; 505 int i; 506 507 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL); 508 if (!conn_info) { 509 QEDI_ERR(&qedi->dbg_ctx, 510 "Failed to allocate memory ep=%p\n", qedi_ep); 511 return -ENOMEM; 512 } 513 514 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac); 515 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac); 516 517 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]); 518 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]); 519 520 if (qedi_ep->ip_type == TCP_IPV4) { 521 conn_info->ip_version = 0; 522 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 523 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n", 524 qedi_ep->src_addr, qedi_ep->dst_addr); 525 } else { 526 for (i = 1; i < 4; i++) { 527 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]); 528 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]); 529 } 530 531 conn_info->ip_version = 1; 532 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 533 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n", 534 qedi_ep->src_addr, qedi_ep->dst_addr); 535 } 536 537 conn_info->src.port = qedi_ep->src_port; 538 conn_info->dst.port = qedi_ep->dst_port; 539 540 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE; 541 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma; 542 conn_info->vlan_id = qedi_ep->vlan_id; 543 544 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1); 545 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1); 546 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1); 547 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1); 548 549 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues); 550 551 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT; 552 conn_info->dup_ack_theshold = 3; 553 conn_info->rcv_wnd = 65535; 554 555 conn_info->ss_thresh = 65535; 556 conn_info->srtt = 300; 557 conn_info->rtt_var = 150; 558 conn_info->flow_label = 0; 559 conn_info->ka_timeout = DEF_KA_TIMEOUT; 560 conn_info->ka_interval = DEF_KA_INTERVAL; 561 conn_info->max_rt_time = DEF_MAX_RT_TIME; 562 conn_info->ttl = DEF_TTL; 563 conn_info->tos_or_tc = DEF_TOS; 564 conn_info->remote_port = qedi_ep->dst_port; 565 conn_info->local_port = qedi_ep->src_port; 566 567 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu, 568 (qedi_ep->ip_type == TCP_IPV6), 569 1, (qedi_ep->vlan_id != 0)); 570 571 conn_info->cwnd = DEF_MAX_CWND * conn_info->mss; 572 conn_info->rcv_wnd_scale = 4; 573 conn_info->da_timeout_value = 200; 574 conn_info->ack_frequency = 2; 575 576 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 577 "Default cq index [%d], mss [%d]\n", 578 conn_info->default_cq, conn_info->mss); 579 580 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info); 581 if (rval) 582 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n", 583 rval, qedi_ep); 584 585 kfree(conn_info); 586 return rval; 587} 588 589static int qedi_conn_start(struct iscsi_cls_conn *cls_conn) 590{ 591 struct iscsi_conn *conn = cls_conn->dd_data; 592 struct qedi_conn *qedi_conn = conn->dd_data; 593 struct qedi_ctx *qedi; 594 int rval; 595 596 qedi = qedi_conn->qedi; 597 598 rval = qedi_iscsi_update_conn(qedi, qedi_conn); 599 if (rval) { 600 iscsi_conn_printk(KERN_ALERT, conn, 601 "conn_start: FW offload conn failed.\n"); 602 rval = -EINVAL; 603 goto start_err; 604 } 605 606 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); 607 qedi_conn->abrt_conn = 0; 608 609 rval = iscsi_conn_start(cls_conn); 610 if (rval) { 611 iscsi_conn_printk(KERN_ALERT, conn, 612 "iscsi_conn_start: FW offload conn failed!!\n"); 613 } 614 615start_err: 616 return rval; 617} 618 619static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn) 620{ 621 struct iscsi_conn *conn = cls_conn->dd_data; 622 struct qedi_conn *qedi_conn = conn->dd_data; 623 struct Scsi_Host *shost; 624 struct qedi_ctx *qedi; 625 626 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 627 qedi = iscsi_host_priv(shost); 628 629 qedi_conn_free_login_resources(qedi, qedi_conn); 630 iscsi_conn_teardown(cls_conn); 631} 632 633static int qedi_ep_get_param(struct iscsi_endpoint *ep, 634 enum iscsi_param param, char *buf) 635{ 636 struct qedi_endpoint *qedi_ep = ep->dd_data; 637 int len; 638 639 if (!qedi_ep) 640 return -ENOTCONN; 641 642 switch (param) { 643 case ISCSI_PARAM_CONN_PORT: 644 len = sprintf(buf, "%hu\n", qedi_ep->dst_port); 645 break; 646 case ISCSI_PARAM_CONN_ADDRESS: 647 if (qedi_ep->ip_type == TCP_IPV4) 648 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr); 649 else 650 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr); 651 break; 652 default: 653 return -ENOTCONN; 654 } 655 656 return len; 657} 658 659static int qedi_host_get_param(struct Scsi_Host *shost, 660 enum iscsi_host_param param, char *buf) 661{ 662 struct qedi_ctx *qedi; 663 int len; 664 665 qedi = iscsi_host_priv(shost); 666 667 switch (param) { 668 case ISCSI_HOST_PARAM_HWADDRESS: 669 len = sysfs_format_mac(buf, qedi->mac, 6); 670 break; 671 case ISCSI_HOST_PARAM_NETDEV_NAME: 672 len = sprintf(buf, "host%d\n", shost->host_no); 673 break; 674 case ISCSI_HOST_PARAM_IPADDRESS: 675 if (qedi->ip_type == TCP_IPV4) 676 len = sprintf(buf, "%pI4\n", qedi->src_ip); 677 else 678 len = sprintf(buf, "%pI6\n", qedi->src_ip); 679 break; 680 default: 681 return iscsi_host_get_param(shost, param, buf); 682 } 683 684 return len; 685} 686 687static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn, 688 struct iscsi_stats *stats) 689{ 690 struct iscsi_conn *conn = cls_conn->dd_data; 691 struct qed_iscsi_stats iscsi_stats; 692 struct Scsi_Host *shost; 693 struct qedi_ctx *qedi; 694 695 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); 696 qedi = iscsi_host_priv(shost); 697 qedi_ops->get_stats(qedi->cdev, &iscsi_stats); 698 699 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt; 700 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt; 701 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt; 702 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt; 703 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt; 704 705 stats->txdata_octets = conn->txdata_octets; 706 stats->rxdata_octets = conn->rxdata_octets; 707 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 708 stats->dataout_pdus = conn->dataout_pdus_cnt; 709 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 710 stats->datain_pdus = conn->datain_pdus_cnt; 711 stats->r2t_pdus = conn->r2t_pdus_cnt; 712 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 713 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 714 stats->digest_err = 0; 715 stats->timeout_err = 0; 716 strcpy(stats->custom[0].desc, "eh_abort_cnt"); 717 stats->custom[0].value = conn->eh_abort_cnt; 718 stats->custom_length = 1; 719} 720 721static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn) 722{ 723 struct scsi_sge *bd_tbl; 724 725 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 726 727 bd_tbl->sge_addr.hi = 728 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); 729 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr; 730 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr - 731 qedi_conn->gen_pdu.req_buf; 732 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 733 bd_tbl->sge_addr.hi = 734 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); 735 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr; 736 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN; 737} 738 739static int qedi_iscsi_send_generic_request(struct iscsi_task *task) 740{ 741 struct qedi_cmd *cmd = task->dd_data; 742 struct qedi_conn *qedi_conn = cmd->conn; 743 char *buf; 744 int data_len; 745 int rc = 0; 746 747 qedi_iscsi_prep_generic_pdu_bd(qedi_conn); 748 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { 749 case ISCSI_OP_LOGIN: 750 qedi_send_iscsi_login(qedi_conn, task); 751 break; 752 case ISCSI_OP_NOOP_OUT: 753 data_len = qedi_conn->gen_pdu.req_buf_size; 754 buf = qedi_conn->gen_pdu.req_buf; 755 if (data_len) 756 rc = qedi_send_iscsi_nopout(qedi_conn, task, 757 buf, data_len, 1); 758 else 759 rc = qedi_send_iscsi_nopout(qedi_conn, task, 760 NULL, 0, 1); 761 break; 762 case ISCSI_OP_LOGOUT: 763 rc = qedi_send_iscsi_logout(qedi_conn, task); 764 break; 765 case ISCSI_OP_SCSI_TMFUNC: 766 rc = qedi_iscsi_abort_work(qedi_conn, task); 767 break; 768 case ISCSI_OP_TEXT: 769 rc = qedi_send_iscsi_text(qedi_conn, task); 770 break; 771 default: 772 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data, 773 "unsupported op 0x%x\n", task->hdr->opcode); 774 } 775 776 return rc; 777} 778 779static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 780{ 781 struct qedi_conn *qedi_conn = conn->dd_data; 782 struct qedi_cmd *cmd = task->dd_data; 783 784 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); 785 786 qedi_conn->gen_pdu.req_buf_size = task->data_count; 787 788 if (task->data_count) { 789 memcpy(qedi_conn->gen_pdu.req_buf, task->data, 790 task->data_count); 791 qedi_conn->gen_pdu.req_wr_ptr = 792 qedi_conn->gen_pdu.req_buf + task->data_count; 793 } 794 795 cmd->conn = conn->dd_data; 796 return qedi_iscsi_send_generic_request(task); 797} 798 799static int qedi_task_xmit(struct iscsi_task *task) 800{ 801 struct iscsi_conn *conn = task->conn; 802 struct qedi_conn *qedi_conn = conn->dd_data; 803 struct qedi_cmd *cmd = task->dd_data; 804 struct scsi_cmnd *sc = task->sc; 805 806 /* Clear now so in cleanup_task we know it didn't make it */ 807 cmd->scsi_cmd = NULL; 808 cmd->task_id = U16_MAX; 809 810 if (test_bit(QEDI_IN_SHUTDOWN, &qedi_conn->qedi->flags)) 811 return -ENODEV; 812 813 if (test_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags)) 814 return -EACCES; 815 816 cmd->state = 0; 817 cmd->task = NULL; 818 cmd->use_slowpath = false; 819 cmd->conn = qedi_conn; 820 cmd->task = task; 821 cmd->io_cmd_in_list = false; 822 INIT_LIST_HEAD(&cmd->io_cmd); 823 824 if (!sc) 825 return qedi_mtask_xmit(conn, task); 826 827 cmd->scsi_cmd = sc; 828 return qedi_iscsi_send_ioreq(task); 829} 830 831static void qedi_offload_work(struct work_struct *work) 832{ 833 struct qedi_endpoint *qedi_ep = 834 container_of(work, struct qedi_endpoint, offload_work); 835 struct qedi_ctx *qedi; 836 int wait_delay = 5 * HZ; 837 int ret; 838 839 qedi = qedi_ep->qedi; 840 841 ret = qedi_iscsi_offload_conn(qedi_ep); 842 if (ret) { 843 QEDI_ERR(&qedi->dbg_ctx, 844 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n", 845 qedi_ep->iscsi_cid, qedi_ep, ret); 846 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 847 return; 848 } 849 850 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait, 851 (qedi_ep->state == 852 EP_STATE_OFLDCONN_COMPL), 853 wait_delay); 854 if (ret <= 0 || qedi_ep->state != EP_STATE_OFLDCONN_COMPL) { 855 qedi_ep->state = EP_STATE_OFLDCONN_FAILED; 856 QEDI_ERR(&qedi->dbg_ctx, 857 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n", 858 qedi_ep->iscsi_cid, qedi_ep); 859 } 860} 861 862static struct iscsi_endpoint * 863qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr, 864 int non_blocking) 865{ 866 struct qedi_ctx *qedi; 867 struct iscsi_endpoint *ep; 868 struct qedi_endpoint *qedi_ep; 869 struct sockaddr_in *addr; 870 struct sockaddr_in6 *addr6; 871 struct iscsi_path path_req; 872 u32 msg_type = ISCSI_KEVENT_IF_DOWN; 873 u32 iscsi_cid = QEDI_CID_RESERVED; 874 u16 len = 0; 875 char *buf = NULL; 876 int ret, tmp; 877 878 if (!shost) { 879 ret = -ENXIO; 880 QEDI_ERR(NULL, "shost is NULL\n"); 881 return ERR_PTR(ret); 882 } 883 884 if (qedi_do_not_recover) { 885 ret = -ENOMEM; 886 return ERR_PTR(ret); 887 } 888 889 qedi = iscsi_host_priv(shost); 890 891 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) || 892 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 893 ret = -ENOMEM; 894 return ERR_PTR(ret); 895 } 896 897 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) { 898 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n"); 899 return ERR_PTR(-ENXIO); 900 } 901 902 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint)); 903 if (!ep) { 904 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n"); 905 ret = -ENOMEM; 906 return ERR_PTR(ret); 907 } 908 qedi_ep = ep->dd_data; 909 memset(qedi_ep, 0, sizeof(struct qedi_endpoint)); 910 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work); 911 qedi_ep->state = EP_STATE_IDLE; 912 qedi_ep->iscsi_cid = (u32)-1; 913 qedi_ep->qedi = qedi; 914 915 if (dst_addr->sa_family == AF_INET) { 916 addr = (struct sockaddr_in *)dst_addr; 917 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr, 918 sizeof(struct in_addr)); 919 qedi_ep->dst_port = ntohs(addr->sin_port); 920 qedi_ep->ip_type = TCP_IPV4; 921 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 922 "dst_addr=%pI4, dst_port=%u\n", 923 qedi_ep->dst_addr, qedi_ep->dst_port); 924 } else if (dst_addr->sa_family == AF_INET6) { 925 addr6 = (struct sockaddr_in6 *)dst_addr; 926 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr, 927 sizeof(struct in6_addr)); 928 qedi_ep->dst_port = ntohs(addr6->sin6_port); 929 qedi_ep->ip_type = TCP_IPV6; 930 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 931 "dst_addr=%pI6, dst_port=%u\n", 932 qedi_ep->dst_addr, qedi_ep->dst_port); 933 } else { 934 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n"); 935 } 936 937 ret = qedi_alloc_sq(qedi, qedi_ep); 938 if (ret) 939 goto ep_conn_exit; 940 941 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle, 942 &qedi_ep->fw_cid, &qedi_ep->p_doorbell); 943 944 if (ret) { 945 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n"); 946 ret = -ENXIO; 947 goto ep_free_sq; 948 } 949 950 iscsi_cid = qedi_ep->handle; 951 qedi_ep->iscsi_cid = iscsi_cid; 952 953 init_waitqueue_head(&qedi_ep->ofld_wait); 954 init_waitqueue_head(&qedi_ep->tcp_ofld_wait); 955 qedi_ep->state = EP_STATE_OFLDCONN_START; 956 qedi->ep_tbl[iscsi_cid] = qedi_ep; 957 958 buf = (char *)&path_req; 959 len = sizeof(path_req); 960 memset(&path_req, 0, len); 961 962 msg_type = ISCSI_KEVENT_PATH_REQ; 963 path_req.handle = (u64)qedi_ep->iscsi_cid; 964 path_req.pmtu = qedi->ll2_mtu; 965 qedi_ep->pmtu = qedi->ll2_mtu; 966 if (qedi_ep->ip_type == TCP_IPV4) { 967 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr, 968 sizeof(struct in_addr)); 969 path_req.ip_addr_len = 4; 970 } else { 971 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr, 972 sizeof(struct in6_addr)); 973 path_req.ip_addr_len = 16; 974 } 975 976 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf, 977 len); 978 if (ret) { 979 QEDI_ERR(&qedi->dbg_ctx, 980 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n", 981 iscsi_cid, ret); 982 goto ep_rel_conn; 983 } 984 985 atomic_inc(&qedi->num_offloads); 986 return ep; 987 988ep_rel_conn: 989 qedi->ep_tbl[iscsi_cid] = NULL; 990 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 991 if (tmp) 992 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n", 993 tmp); 994ep_free_sq: 995 qedi_free_sq(qedi, qedi_ep); 996ep_conn_exit: 997 iscsi_destroy_endpoint(ep); 998 return ERR_PTR(ret); 999} 1000 1001static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 1002{ 1003 struct qedi_endpoint *qedi_ep; 1004 int ret = 0; 1005 1006 if (qedi_do_not_recover) 1007 return 1; 1008 1009 qedi_ep = ep->dd_data; 1010 if (qedi_ep->state == EP_STATE_IDLE || 1011 qedi_ep->state == EP_STATE_OFLDCONN_NONE || 1012 qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 1013 return -1; 1014 1015 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL) 1016 ret = 1; 1017 1018 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait, 1019 QEDI_OFLD_WAIT_STATE(qedi_ep), 1020 msecs_to_jiffies(timeout_ms)); 1021 1022 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED) 1023 ret = -1; 1024 1025 if (ret > 0) 1026 return 1; 1027 else if (!ret) 1028 return 0; 1029 else 1030 return ret; 1031} 1032 1033static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn) 1034{ 1035 struct qedi_cmd *cmd, *cmd_tmp; 1036 1037 spin_lock(&qedi_conn->list_lock); 1038 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list, 1039 io_cmd) { 1040 list_del_init(&cmd->io_cmd); 1041 qedi_conn->active_cmd_count--; 1042 } 1043 spin_unlock(&qedi_conn->list_lock); 1044} 1045 1046static void qedi_ep_disconnect(struct iscsi_endpoint *ep) 1047{ 1048 struct qedi_endpoint *qedi_ep; 1049 struct qedi_conn *qedi_conn = NULL; 1050 struct iscsi_conn *conn = NULL; 1051 struct qedi_ctx *qedi; 1052 int ret = 0; 1053 int wait_delay; 1054 int abrt_conn = 0; 1055 int count = 10; 1056 1057 wait_delay = 60 * HZ + DEF_MAX_RT_TIME; 1058 qedi_ep = ep->dd_data; 1059 qedi = qedi_ep->qedi; 1060 1061 flush_work(&qedi_ep->offload_work); 1062 1063 if (qedi_ep->state == EP_STATE_OFLDCONN_START) 1064 goto ep_exit_recover; 1065 1066 if (qedi_ep->conn) { 1067 qedi_conn = qedi_ep->conn; 1068 conn = qedi_conn->cls_conn->dd_data; 1069 iscsi_suspend_queue(conn); 1070 abrt_conn = qedi_conn->abrt_conn; 1071 1072 while (count--) { 1073 if (!test_bit(QEDI_CONN_FW_CLEANUP, 1074 &qedi_conn->flags)) { 1075 break; 1076 } 1077 msleep(1000); 1078 } 1079 1080 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) { 1081 if (qedi_do_not_recover) { 1082 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1083 "Do not recover cid=0x%x\n", 1084 qedi_ep->iscsi_cid); 1085 goto ep_exit_recover; 1086 } 1087 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1088 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n", 1089 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state); 1090 qedi_cleanup_active_cmd_list(qedi_conn); 1091 goto ep_release_conn; 1092 } 1093 } 1094 1095 if (qedi_do_not_recover) 1096 goto ep_exit_recover; 1097 1098 switch (qedi_ep->state) { 1099 case EP_STATE_OFLDCONN_START: 1100 case EP_STATE_OFLDCONN_NONE: 1101 goto ep_release_conn; 1102 case EP_STATE_OFLDCONN_FAILED: 1103 break; 1104 case EP_STATE_OFLDCONN_COMPL: 1105 if (unlikely(!qedi_conn)) 1106 break; 1107 1108 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1109 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n", 1110 qedi_conn->active_cmd_count, abrt_conn, 1111 qedi_ep->state, 1112 qedi_ep->iscsi_cid, 1113 qedi_ep->conn 1114 ); 1115 1116 if (!qedi_conn->active_cmd_count) 1117 abrt_conn = 0; 1118 else 1119 abrt_conn = 1; 1120 1121 if (abrt_conn) 1122 qedi_clearsq(qedi, qedi_conn, NULL); 1123 break; 1124 default: 1125 break; 1126 } 1127 1128 if (!abrt_conn) 1129 wait_delay += qedi->pf_params.iscsi_pf_params.two_msl_timer; 1130 1131 qedi_ep->state = EP_STATE_DISCONN_START; 1132 1133 if (test_bit(QEDI_IN_SHUTDOWN, &qedi->flags) || 1134 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) 1135 goto ep_release_conn; 1136 1137 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn); 1138 if (ret) { 1139 QEDI_WARN(&qedi->dbg_ctx, 1140 "destroy_conn failed returned %d\n", ret); 1141 } else { 1142 ret = wait_event_interruptible_timeout( 1143 qedi_ep->tcp_ofld_wait, 1144 (qedi_ep->state != 1145 EP_STATE_DISCONN_START), 1146 wait_delay); 1147 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) { 1148 QEDI_WARN(&qedi->dbg_ctx, 1149 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n", 1150 ret, wait_delay, qedi_ep->iscsi_cid); 1151 } 1152 } 1153 1154ep_release_conn: 1155 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle); 1156 if (ret) 1157 QEDI_WARN(&qedi->dbg_ctx, 1158 "release_conn returned %d, cid=0x%x\n", 1159 ret, qedi_ep->iscsi_cid); 1160ep_exit_recover: 1161 qedi_ep->state = EP_STATE_IDLE; 1162 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL; 1163 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL; 1164 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port); 1165 qedi_free_sq(qedi, qedi_ep); 1166 1167 if (qedi_conn) 1168 qedi_conn->ep = NULL; 1169 1170 qedi_ep->conn = NULL; 1171 qedi_ep->qedi = NULL; 1172 atomic_dec(&qedi->num_offloads); 1173 1174 iscsi_destroy_endpoint(ep); 1175} 1176 1177static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid) 1178{ 1179 struct qed_dev *cdev = qedi->cdev; 1180 struct qedi_uio_dev *udev; 1181 struct qedi_uio_ctrl *uctrl; 1182 struct sk_buff *skb; 1183 u32 len; 1184 int rc = 0; 1185 1186 udev = qedi->udev; 1187 if (!udev) { 1188 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n"); 1189 return -EINVAL; 1190 } 1191 1192 uctrl = (struct qedi_uio_ctrl *)udev->uctrl; 1193 if (!uctrl) { 1194 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n"); 1195 return -EINVAL; 1196 } 1197 1198 len = uctrl->host_tx_pkt_len; 1199 if (!len) { 1200 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len); 1201 return -EINVAL; 1202 } 1203 1204 skb = alloc_skb(len, GFP_ATOMIC); 1205 if (!skb) { 1206 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n"); 1207 return -EINVAL; 1208 } 1209 1210 skb_put(skb, len); 1211 memcpy(skb->data, udev->tx_pkt, len); 1212 skb->ip_summed = CHECKSUM_NONE; 1213 1214 if (vlanid) 1215 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); 1216 1217 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0); 1218 if (rc) { 1219 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n", 1220 rc); 1221 kfree_skb(skb); 1222 } 1223 1224 uctrl->host_tx_pkt_len = 0; 1225 uctrl->hw_tx_cons++; 1226 1227 return rc; 1228} 1229 1230static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data) 1231{ 1232 struct qedi_ctx *qedi; 1233 struct qedi_endpoint *qedi_ep; 1234 int ret = 0; 1235 u32 iscsi_cid; 1236 u16 port_id = 0; 1237 1238 if (!shost) { 1239 ret = -ENXIO; 1240 QEDI_ERR(NULL, "shost is NULL\n"); 1241 return ret; 1242 } 1243 1244 if (strcmp(shost->hostt->proc_name, "qedi")) { 1245 ret = -ENXIO; 1246 QEDI_ERR(NULL, "shost %s is invalid\n", 1247 shost->hostt->proc_name); 1248 return ret; 1249 } 1250 1251 qedi = iscsi_host_priv(shost); 1252 if (path_data->handle == QEDI_PATH_HANDLE) { 1253 ret = qedi_data_avail(qedi, path_data->vlan_id); 1254 goto set_path_exit; 1255 } 1256 1257 iscsi_cid = (u32)path_data->handle; 1258 if (iscsi_cid >= qedi->max_active_conns) { 1259 ret = -EINVAL; 1260 goto set_path_exit; 1261 } 1262 qedi_ep = qedi->ep_tbl[iscsi_cid]; 1263 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1264 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep); 1265 if (!qedi_ep) { 1266 ret = -EINVAL; 1267 goto set_path_exit; 1268 } 1269 1270 if (!is_valid_ether_addr(&path_data->mac_addr[0])) { 1271 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n"); 1272 qedi_ep->state = EP_STATE_OFLDCONN_NONE; 1273 ret = -EIO; 1274 goto set_path_exit; 1275 } 1276 1277 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]); 1278 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]); 1279 1280 qedi_ep->vlan_id = path_data->vlan_id; 1281 if (path_data->pmtu < DEF_PATH_MTU) { 1282 qedi_ep->pmtu = qedi->ll2_mtu; 1283 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1284 "MTU cannot be %u, using default MTU %u\n", 1285 path_data->pmtu, qedi_ep->pmtu); 1286 } 1287 1288 if (path_data->pmtu != qedi->ll2_mtu) { 1289 if (path_data->pmtu > JUMBO_MTU) { 1290 ret = -EINVAL; 1291 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu); 1292 goto set_path_exit; 1293 } 1294 1295 qedi_reset_host_mtu(qedi, path_data->pmtu); 1296 qedi_ep->pmtu = qedi->ll2_mtu; 1297 } 1298 1299 port_id = qedi_ep->src_port; 1300 if (port_id >= QEDI_LOCAL_PORT_MIN && 1301 port_id < QEDI_LOCAL_PORT_MAX) { 1302 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id)) 1303 port_id = 0; 1304 } else { 1305 port_id = 0; 1306 } 1307 1308 if (!port_id) { 1309 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl); 1310 if (port_id == QEDI_LOCAL_PORT_INVALID) { 1311 QEDI_ERR(&qedi->dbg_ctx, 1312 "Failed to allocate port id for iscsi_cid=0x%x\n", 1313 iscsi_cid); 1314 ret = -ENOMEM; 1315 goto set_path_exit; 1316 } 1317 } 1318 1319 qedi_ep->src_port = port_id; 1320 1321 if (qedi_ep->ip_type == TCP_IPV4) { 1322 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr, 1323 sizeof(struct in_addr)); 1324 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr, 1325 sizeof(struct in_addr)); 1326 qedi->ip_type = TCP_IPV4; 1327 1328 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1329 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n", 1330 qedi_ep->src_addr, qedi_ep->src_port, 1331 qedi_ep->dst_addr, qedi_ep->dst_port); 1332 } else { 1333 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr, 1334 sizeof(struct in6_addr)); 1335 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr, 1336 sizeof(struct in6_addr)); 1337 qedi->ip_type = TCP_IPV6; 1338 1339 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 1340 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n", 1341 qedi_ep->src_addr, qedi_ep->src_port, 1342 qedi_ep->dst_addr, qedi_ep->dst_port); 1343 } 1344 1345 queue_work(qedi->offload_thread, &qedi_ep->offload_work); 1346 1347 ret = 0; 1348 1349set_path_exit: 1350 return ret; 1351} 1352 1353static umode_t qedi_attr_is_visible(int param_type, int param) 1354{ 1355 switch (param_type) { 1356 case ISCSI_HOST_PARAM: 1357 switch (param) { 1358 case ISCSI_HOST_PARAM_NETDEV_NAME: 1359 case ISCSI_HOST_PARAM_HWADDRESS: 1360 case ISCSI_HOST_PARAM_IPADDRESS: 1361 return 0444; 1362 default: 1363 return 0; 1364 } 1365 case ISCSI_PARAM: 1366 switch (param) { 1367 case ISCSI_PARAM_MAX_RECV_DLENGTH: 1368 case ISCSI_PARAM_MAX_XMIT_DLENGTH: 1369 case ISCSI_PARAM_HDRDGST_EN: 1370 case ISCSI_PARAM_DATADGST_EN: 1371 case ISCSI_PARAM_CONN_ADDRESS: 1372 case ISCSI_PARAM_CONN_PORT: 1373 case ISCSI_PARAM_EXP_STATSN: 1374 case ISCSI_PARAM_PERSISTENT_ADDRESS: 1375 case ISCSI_PARAM_PERSISTENT_PORT: 1376 case ISCSI_PARAM_PING_TMO: 1377 case ISCSI_PARAM_RECV_TMO: 1378 case ISCSI_PARAM_INITIAL_R2T_EN: 1379 case ISCSI_PARAM_MAX_R2T: 1380 case ISCSI_PARAM_IMM_DATA_EN: 1381 case ISCSI_PARAM_FIRST_BURST: 1382 case ISCSI_PARAM_MAX_BURST: 1383 case ISCSI_PARAM_PDU_INORDER_EN: 1384 case ISCSI_PARAM_DATASEQ_INORDER_EN: 1385 case ISCSI_PARAM_ERL: 1386 case ISCSI_PARAM_TARGET_NAME: 1387 case ISCSI_PARAM_TPGT: 1388 case ISCSI_PARAM_USERNAME: 1389 case ISCSI_PARAM_PASSWORD: 1390 case ISCSI_PARAM_USERNAME_IN: 1391 case ISCSI_PARAM_PASSWORD_IN: 1392 case ISCSI_PARAM_FAST_ABORT: 1393 case ISCSI_PARAM_ABORT_TMO: 1394 case ISCSI_PARAM_LU_RESET_TMO: 1395 case ISCSI_PARAM_TGT_RESET_TMO: 1396 case ISCSI_PARAM_IFACE_NAME: 1397 case ISCSI_PARAM_INITIATOR_NAME: 1398 case ISCSI_PARAM_BOOT_ROOT: 1399 case ISCSI_PARAM_BOOT_NIC: 1400 case ISCSI_PARAM_BOOT_TARGET: 1401 return 0444; 1402 default: 1403 return 0; 1404 } 1405 } 1406 1407 return 0; 1408} 1409 1410static void qedi_cleanup_task(struct iscsi_task *task) 1411{ 1412 struct qedi_cmd *cmd; 1413 1414 if (task->state == ISCSI_TASK_PENDING) { 1415 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n", 1416 refcount_read(&task->refcount)); 1417 return; 1418 } 1419 1420 if (task->sc) 1421 qedi_iscsi_unmap_sg_list(task->dd_data); 1422 1423 cmd = task->dd_data; 1424 if (cmd->task_id != U16_MAX) 1425 qedi_clear_task_idx(iscsi_host_priv(task->conn->session->host), 1426 cmd->task_id); 1427 1428 cmd->task_id = U16_MAX; 1429 cmd->scsi_cmd = NULL; 1430} 1431 1432struct iscsi_transport qedi_iscsi_transport = { 1433 .owner = THIS_MODULE, 1434 .name = QEDI_MODULE_NAME, 1435 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST | 1436 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO, 1437 .create_session = qedi_session_create, 1438 .destroy_session = qedi_session_destroy, 1439 .create_conn = qedi_conn_create, 1440 .bind_conn = qedi_conn_bind, 1441 .unbind_conn = iscsi_conn_unbind, 1442 .start_conn = qedi_conn_start, 1443 .stop_conn = iscsi_conn_stop, 1444 .destroy_conn = qedi_conn_destroy, 1445 .set_param = iscsi_set_param, 1446 .get_ep_param = qedi_ep_get_param, 1447 .get_conn_param = iscsi_conn_get_param, 1448 .get_session_param = iscsi_session_get_param, 1449 .get_host_param = qedi_host_get_param, 1450 .send_pdu = iscsi_conn_send_pdu, 1451 .get_stats = qedi_conn_get_stats, 1452 .xmit_task = qedi_task_xmit, 1453 .cleanup_task = qedi_cleanup_task, 1454 .session_recovery_timedout = iscsi_session_recovery_timedout, 1455 .ep_connect = qedi_ep_connect, 1456 .ep_poll = qedi_ep_poll, 1457 .ep_disconnect = qedi_ep_disconnect, 1458 .set_path = qedi_set_path, 1459 .attr_is_visible = qedi_attr_is_visible, 1460}; 1461 1462void qedi_start_conn_recovery(struct qedi_ctx *qedi, 1463 struct qedi_conn *qedi_conn) 1464{ 1465 struct iscsi_cls_session *cls_sess; 1466 struct iscsi_cls_conn *cls_conn; 1467 struct iscsi_conn *conn; 1468 1469 cls_conn = qedi_conn->cls_conn; 1470 conn = cls_conn->dd_data; 1471 cls_sess = iscsi_conn_to_session(cls_conn); 1472 1473 if (iscsi_is_session_online(cls_sess)) { 1474 qedi_conn->abrt_conn = 1; 1475 QEDI_ERR(&qedi->dbg_ctx, 1476 "Failing connection, state=0x%x, cid=0x%x\n", 1477 conn->session->state, qedi_conn->iscsi_conn_id); 1478 iscsi_conn_failure(qedi_conn->cls_conn->dd_data, 1479 ISCSI_ERR_CONN_FAILED); 1480 } 1481} 1482 1483static const struct { 1484 enum iscsi_error_types error_code; 1485 char *err_string; 1486} qedi_iscsi_error[] = { 1487 { ISCSI_STATUS_NONE, 1488 "tcp_error none" 1489 }, 1490 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH, 1491 "task cid mismatch" 1492 }, 1493 { ISCSI_CONN_ERROR_TASK_NOT_VALID, 1494 "invalid task" 1495 }, 1496 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL, 1497 "rq ring full" 1498 }, 1499 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL, 1500 "cmdq ring full" 1501 }, 1502 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED, 1503 "sge caching failed" 1504 }, 1505 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR, 1506 "hdr digest error" 1507 }, 1508 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR, 1509 "local cmpl error" 1510 }, 1511 { ISCSI_CONN_ERROR_DATA_OVERRUN, 1512 "invalid task" 1513 }, 1514 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR, 1515 "out of sge error" 1516 }, 1517 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR, 1518 "tcp ip fragment error" 1519 }, 1520 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN, 1521 "AHS len protocol error" 1522 }, 1523 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE, 1524 "itt out of range error" 1525 }, 1526 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE, 1527 "data seg more than pdu size" 1528 }, 1529 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE, 1530 "invalid opcode" 1531 }, 1532 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE, 1533 "invalid opcode before update" 1534 }, 1535 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL, 1536 "unexpected opcode" 1537 }, 1538 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA, 1539 "r2t carries no data" 1540 }, 1541 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN, 1542 "data sn error" 1543 }, 1544 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT, 1545 "data TTT error" 1546 }, 1547 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT, 1548 "r2t TTT error" 1549 }, 1550 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET, 1551 "buffer offset error" 1552 }, 1553 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO, 1554 "buffer offset ooo" 1555 }, 1556 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN, 1557 "data seg len 0" 1558 }, 1559 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0, 1560 "data xer len error" 1561 }, 1562 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1, 1563 "data xer len1 error" 1564 }, 1565 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2, 1566 "data xer len2 error" 1567 }, 1568 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN, 1569 "protocol lun error" 1570 }, 1571 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO, 1572 "f bit zero error" 1573 }, 1574 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN, 1575 "exp stat sn error" 1576 }, 1577 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO, 1578 "dsl not zero error" 1579 }, 1580 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL, 1581 "invalid dsl" 1582 }, 1583 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG, 1584 "data seg len too big" 1585 }, 1586 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT, 1587 "outstanding r2t count error" 1588 }, 1589 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH, 1590 "sense datalen error" 1591 }, 1592}; 1593 1594static char *qedi_get_iscsi_error(enum iscsi_error_types err_code) 1595{ 1596 int i; 1597 char *msg = NULL; 1598 1599 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) { 1600 if (qedi_iscsi_error[i].error_code == err_code) { 1601 msg = qedi_iscsi_error[i].err_string; 1602 break; 1603 } 1604 } 1605 return msg; 1606} 1607 1608void qedi_process_iscsi_error(struct qedi_endpoint *ep, 1609 struct iscsi_eqe_data *data) 1610{ 1611 struct qedi_conn *qedi_conn; 1612 struct qedi_ctx *qedi; 1613 char warn_notice[] = "iscsi_warning"; 1614 char error_notice[] = "iscsi_error"; 1615 char unknown_msg[] = "Unknown error"; 1616 char *message; 1617 int need_recovery = 0; 1618 u32 err_mask = 0; 1619 char *msg; 1620 1621 if (!ep) 1622 return; 1623 1624 qedi_conn = ep->conn; 1625 if (!qedi_conn) 1626 return; 1627 1628 qedi = ep->qedi; 1629 1630 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n", 1631 data->error_code); 1632 1633 if (err_mask) { 1634 need_recovery = 0; 1635 message = warn_notice; 1636 } else { 1637 need_recovery = 1; 1638 message = error_notice; 1639 } 1640 1641 msg = qedi_get_iscsi_error(data->error_code); 1642 if (!msg) { 1643 need_recovery = 0; 1644 msg = unknown_msg; 1645 } 1646 1647 iscsi_conn_printk(KERN_ALERT, 1648 qedi_conn->cls_conn->dd_data, 1649 "qedi: %s - %s\n", message, msg); 1650 1651 if (need_recovery) 1652 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1653} 1654 1655void qedi_clear_session_ctx(struct iscsi_cls_session *cls_sess) 1656{ 1657 struct iscsi_session *session = cls_sess->dd_data; 1658 struct iscsi_conn *conn = session->leadconn; 1659 struct qedi_conn *qedi_conn = conn->dd_data; 1660 1661 if (iscsi_is_session_online(cls_sess)) 1662 qedi_ep_disconnect(qedi_conn->iscsi_ep); 1663 1664 qedi_conn_destroy(qedi_conn->cls_conn); 1665 1666 qedi_session_destroy(cls_sess); 1667} 1668 1669void qedi_process_tcp_error(struct qedi_endpoint *ep, 1670 struct iscsi_eqe_data *data) 1671{ 1672 struct qedi_conn *qedi_conn; 1673 1674 if (!ep) 1675 return; 1676 1677 qedi_conn = ep->conn; 1678 if (!qedi_conn) 1679 return; 1680 1681 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n", 1682 data->error_code); 1683 1684 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn); 1685} 1686