1 /* 2 * Copyright (c) 2016 Chelsio Communications, Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 9 #define DRV_NAME "cxgbit" 10 #define DRV_VERSION "1.0.0-ko" 11 #define pr_fmt(fmt) DRV_NAME ": " fmt 12 13 #include "cxgbit.h" 14 15 #ifdef CONFIG_CHELSIO_T4_DCB 16 #include <net/dcbevent.h> 17 #include "cxgb4_dcb.h" 18 #endif 19 20 LIST_HEAD(cdev_list_head); 21 /* cdev list lock */ 22 DEFINE_MUTEX(cdev_list_lock); 23 24 void _cxgbit_free_cdev(struct kref *kref) 25 { 26 struct cxgbit_device *cdev; 27 28 cdev = container_of(kref, struct cxgbit_device, kref); 29 30 cxgbi_ppm_release(cdev2ppm(cdev)); 31 kfree(cdev); 32 } 33 34 static void cxgbit_set_mdsl(struct cxgbit_device *cdev) 35 { 36 struct cxgb4_lld_info *lldi = &cdev->lldi; 37 u32 mdsl; 38 39 #define ULP2_MAX_PKT_LEN 16224 40 #define ISCSI_PDU_NONPAYLOAD_LEN 312 41 mdsl = min_t(u32, lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN, 42 ULP2_MAX_PKT_LEN - ISCSI_PDU_NONPAYLOAD_LEN); 43 mdsl = min_t(u32, mdsl, 8192); 44 mdsl = min_t(u32, mdsl, (MAX_SKB_FRAGS - 1) * PAGE_SIZE); 45 46 cdev->mdsl = mdsl; 47 } 48 49 static void *cxgbit_uld_add(const struct cxgb4_lld_info *lldi) 50 { 51 struct cxgbit_device *cdev; 52 53 if (is_t4(lldi->adapter_type)) 54 return ERR_PTR(-ENODEV); 55 56 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); 57 if (!cdev) 58 return ERR_PTR(-ENOMEM); 59 60 kref_init(&cdev->kref); 61 62 cdev->lldi = *lldi; 63 64 cxgbit_set_mdsl(cdev); 65 66 if (cxgbit_ddp_init(cdev) < 0) { 67 kfree(cdev); 68 return ERR_PTR(-EINVAL); 69 } 70 71 if (!test_bit(CDEV_DDP_ENABLE, &cdev->flags)) 72 pr_info("cdev %s ddp init failed\n", 73 pci_name(lldi->pdev)); 74 75 if (lldi->fw_vers >= 0x10d2b00) 76 set_bit(CDEV_ISO_ENABLE, &cdev->flags); 77 78 spin_lock_init(&cdev->cskq.lock); 79 INIT_LIST_HEAD(&cdev->cskq.list); 80 81 mutex_lock(&cdev_list_lock); 82 list_add_tail(&cdev->list, &cdev_list_head); 83 mutex_unlock(&cdev_list_lock); 84 85 pr_info("cdev %s added for iSCSI target transport\n", 86 pci_name(lldi->pdev)); 87 88 return cdev; 89 } 90 91 static void cxgbit_close_conn(struct cxgbit_device *cdev) 92 { 93 struct cxgbit_sock *csk; 94 struct sk_buff *skb; 95 bool wakeup_thread = false; 96 97 spin_lock_bh(&cdev->cskq.lock); 98 list_for_each_entry(csk, &cdev->cskq.list, list) { 99 skb = alloc_skb(0, GFP_ATOMIC); 100 if (!skb) 101 continue; 102 103 spin_lock_bh(&csk->rxq.lock); 104 __skb_queue_tail(&csk->rxq, skb); 105 if (skb_queue_len(&csk->rxq) == 1) 106 wakeup_thread = true; 107 spin_unlock_bh(&csk->rxq.lock); 108 109 if (wakeup_thread) { 110 wake_up(&csk->waitq); 111 wakeup_thread = false; 112 } 113 } 114 spin_unlock_bh(&cdev->cskq.lock); 115 } 116 117 static void cxgbit_detach_cdev(struct cxgbit_device *cdev) 118 { 119 bool free_cdev = false; 120 121 spin_lock_bh(&cdev->cskq.lock); 122 if (list_empty(&cdev->cskq.list)) 123 free_cdev = true; 124 spin_unlock_bh(&cdev->cskq.lock); 125 126 if (free_cdev) { 127 mutex_lock(&cdev_list_lock); 128 list_del(&cdev->list); 129 mutex_unlock(&cdev_list_lock); 130 131 cxgbit_put_cdev(cdev); 132 } else { 133 cxgbit_close_conn(cdev); 134 } 135 } 136 137 static int cxgbit_uld_state_change(void *handle, enum cxgb4_state state) 138 { 139 struct cxgbit_device *cdev = handle; 140 141 switch (state) { 142 case CXGB4_STATE_UP: 143 set_bit(CDEV_STATE_UP, &cdev->flags); 144 pr_info("cdev %s state UP.\n", pci_name(cdev->lldi.pdev)); 145 break; 146 case CXGB4_STATE_START_RECOVERY: 147 clear_bit(CDEV_STATE_UP, &cdev->flags); 148 cxgbit_close_conn(cdev); 149 pr_info("cdev %s state RECOVERY.\n", pci_name(cdev->lldi.pdev)); 150 break; 151 case CXGB4_STATE_DOWN: 152 pr_info("cdev %s state DOWN.\n", pci_name(cdev->lldi.pdev)); 153 break; 154 case CXGB4_STATE_DETACH: 155 clear_bit(CDEV_STATE_UP, &cdev->flags); 156 pr_info("cdev %s state DETACH.\n", pci_name(cdev->lldi.pdev)); 157 cxgbit_detach_cdev(cdev); 158 break; 159 default: 160 pr_info("cdev %s unknown state %d.\n", 161 pci_name(cdev->lldi.pdev), state); 162 break; 163 } 164 return 0; 165 } 166 167 static void 168 cxgbit_proc_ddp_status(unsigned int tid, struct cpl_rx_data_ddp *cpl, 169 struct cxgbit_lro_pdu_cb *pdu_cb) 170 { 171 unsigned int status = ntohl(cpl->ddpvld); 172 173 pdu_cb->flags |= PDUCBF_RX_STATUS; 174 pdu_cb->ddigest = ntohl(cpl->ulp_crc); 175 pdu_cb->pdulen = ntohs(cpl->len); 176 177 if (status & (1 << CPL_RX_ISCSI_DDP_STATUS_HCRC_SHIFT)) { 178 pr_info("tid 0x%x, status 0x%x, hcrc bad.\n", tid, status); 179 pdu_cb->flags |= PDUCBF_RX_HCRC_ERR; 180 } 181 182 if (status & (1 << CPL_RX_ISCSI_DDP_STATUS_DCRC_SHIFT)) { 183 pr_info("tid 0x%x, status 0x%x, dcrc bad.\n", tid, status); 184 pdu_cb->flags |= PDUCBF_RX_DCRC_ERR; 185 } 186 187 if (status & (1 << CPL_RX_ISCSI_DDP_STATUS_PAD_SHIFT)) 188 pr_info("tid 0x%x, status 0x%x, pad bad.\n", tid, status); 189 190 if ((status & (1 << CPL_RX_ISCSI_DDP_STATUS_DDP_SHIFT)) && 191 (!(pdu_cb->flags & PDUCBF_RX_DATA))) { 192 pdu_cb->flags |= PDUCBF_RX_DATA_DDPD; 193 } 194 } 195 196 static void 197 cxgbit_lro_add_packet_rsp(struct sk_buff *skb, u8 op, const __be64 *rsp) 198 { 199 struct cxgbit_lro_cb *lro_cb = cxgbit_skb_lro_cb(skb); 200 struct cxgbit_lro_pdu_cb *pdu_cb = cxgbit_skb_lro_pdu_cb(skb, 201 lro_cb->pdu_idx); 202 struct cpl_rx_iscsi_ddp *cpl = (struct cpl_rx_iscsi_ddp *)(rsp + 1); 203 204 cxgbit_proc_ddp_status(lro_cb->csk->tid, cpl, pdu_cb); 205 206 if (pdu_cb->flags & PDUCBF_RX_HDR) 207 pdu_cb->complete = true; 208 209 lro_cb->complete = true; 210 lro_cb->pdu_totallen += pdu_cb->pdulen; 211 lro_cb->pdu_idx++; 212 } 213 214 static void 215 cxgbit_copy_frags(struct sk_buff *skb, const struct pkt_gl *gl, 216 unsigned int offset) 217 { 218 u8 skb_frag_idx = skb_shinfo(skb)->nr_frags; 219 u8 i; 220 221 /* usually there's just one frag */ 222 __skb_fill_page_desc(skb, skb_frag_idx, gl->frags[0].page, 223 gl->frags[0].offset + offset, 224 gl->frags[0].size - offset); 225 for (i = 1; i < gl->nfrags; i++) 226 __skb_fill_page_desc(skb, skb_frag_idx + i, 227 gl->frags[i].page, 228 gl->frags[i].offset, 229 gl->frags[i].size); 230 231 skb_shinfo(skb)->nr_frags += gl->nfrags; 232 233 /* get a reference to the last page, we don't own it */ 234 get_page(gl->frags[gl->nfrags - 1].page); 235 } 236 237 static void 238 cxgbit_lro_add_packet_gl(struct sk_buff *skb, u8 op, const struct pkt_gl *gl) 239 { 240 struct cxgbit_lro_cb *lro_cb = cxgbit_skb_lro_cb(skb); 241 struct cxgbit_lro_pdu_cb *pdu_cb = cxgbit_skb_lro_pdu_cb(skb, 242 lro_cb->pdu_idx); 243 u32 len, offset; 244 245 if (op == CPL_ISCSI_HDR) { 246 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)gl->va; 247 248 offset = sizeof(struct cpl_iscsi_hdr); 249 pdu_cb->flags |= PDUCBF_RX_HDR; 250 pdu_cb->seq = ntohl(cpl->seq); 251 len = ntohs(cpl->len); 252 pdu_cb->hdr = gl->va + offset; 253 pdu_cb->hlen = len; 254 pdu_cb->hfrag_idx = skb_shinfo(skb)->nr_frags; 255 256 if (unlikely(gl->nfrags > 1)) 257 cxgbit_skcb_flags(skb) = 0; 258 259 lro_cb->complete = false; 260 } else { 261 struct cpl_iscsi_data *cpl = (struct cpl_iscsi_data *)gl->va; 262 263 offset = sizeof(struct cpl_iscsi_data); 264 pdu_cb->flags |= PDUCBF_RX_DATA; 265 len = ntohs(cpl->len); 266 pdu_cb->dlen = len; 267 pdu_cb->doffset = lro_cb->offset; 268 pdu_cb->nr_dfrags = gl->nfrags; 269 pdu_cb->dfrag_idx = skb_shinfo(skb)->nr_frags; 270 } 271 272 cxgbit_copy_frags(skb, gl, offset); 273 274 pdu_cb->frags += gl->nfrags; 275 lro_cb->offset += len; 276 skb->len += len; 277 skb->data_len += len; 278 skb->truesize += len; 279 } 280 281 static struct sk_buff * 282 cxgbit_lro_init_skb(struct cxgbit_sock *csk, u8 op, const struct pkt_gl *gl, 283 const __be64 *rsp, struct napi_struct *napi) 284 { 285 struct sk_buff *skb; 286 struct cxgbit_lro_cb *lro_cb; 287 288 skb = napi_alloc_skb(napi, LRO_SKB_MAX_HEADROOM); 289 290 if (unlikely(!skb)) 291 return NULL; 292 293 memset(skb->data, 0, LRO_SKB_MAX_HEADROOM); 294 295 cxgbit_skcb_flags(skb) |= SKCBF_RX_LRO; 296 297 lro_cb = cxgbit_skb_lro_cb(skb); 298 299 cxgbit_get_csk(csk); 300 301 lro_cb->csk = csk; 302 303 return skb; 304 } 305 306 static void cxgbit_queue_lro_skb(struct cxgbit_sock *csk, struct sk_buff *skb) 307 { 308 bool wakeup_thread = false; 309 310 spin_lock(&csk->rxq.lock); 311 __skb_queue_tail(&csk->rxq, skb); 312 if (skb_queue_len(&csk->rxq) == 1) 313 wakeup_thread = true; 314 spin_unlock(&csk->rxq.lock); 315 316 if (wakeup_thread) 317 wake_up(&csk->waitq); 318 } 319 320 static void cxgbit_lro_flush(struct t4_lro_mgr *lro_mgr, struct sk_buff *skb) 321 { 322 struct cxgbit_lro_cb *lro_cb = cxgbit_skb_lro_cb(skb); 323 struct cxgbit_sock *csk = lro_cb->csk; 324 325 csk->lro_skb = NULL; 326 327 __skb_unlink(skb, &lro_mgr->lroq); 328 cxgbit_queue_lro_skb(csk, skb); 329 330 cxgbit_put_csk(csk); 331 332 lro_mgr->lro_pkts++; 333 lro_mgr->lro_session_cnt--; 334 } 335 336 static void cxgbit_uld_lro_flush(struct t4_lro_mgr *lro_mgr) 337 { 338 struct sk_buff *skb; 339 340 while ((skb = skb_peek(&lro_mgr->lroq))) 341 cxgbit_lro_flush(lro_mgr, skb); 342 } 343 344 static int 345 cxgbit_lro_receive(struct cxgbit_sock *csk, u8 op, const __be64 *rsp, 346 const struct pkt_gl *gl, struct t4_lro_mgr *lro_mgr, 347 struct napi_struct *napi) 348 { 349 struct sk_buff *skb; 350 struct cxgbit_lro_cb *lro_cb; 351 352 if (!csk) { 353 pr_err("%s: csk NULL, op 0x%x.\n", __func__, op); 354 goto out; 355 } 356 357 if (csk->lro_skb) 358 goto add_packet; 359 360 start_lro: 361 if (lro_mgr->lro_session_cnt >= MAX_LRO_SESSIONS) { 362 cxgbit_uld_lro_flush(lro_mgr); 363 goto start_lro; 364 } 365 366 skb = cxgbit_lro_init_skb(csk, op, gl, rsp, napi); 367 if (unlikely(!skb)) 368 goto out; 369 370 csk->lro_skb = skb; 371 372 __skb_queue_tail(&lro_mgr->lroq, skb); 373 lro_mgr->lro_session_cnt++; 374 375 add_packet: 376 skb = csk->lro_skb; 377 lro_cb = cxgbit_skb_lro_cb(skb); 378 379 if ((gl && (((skb_shinfo(skb)->nr_frags + gl->nfrags) > 380 MAX_SKB_FRAGS) || (lro_cb->pdu_totallen >= LRO_FLUSH_LEN_MAX))) || 381 (lro_cb->pdu_idx >= MAX_SKB_FRAGS)) { 382 cxgbit_lro_flush(lro_mgr, skb); 383 goto start_lro; 384 } 385 386 if (gl) 387 cxgbit_lro_add_packet_gl(skb, op, gl); 388 else 389 cxgbit_lro_add_packet_rsp(skb, op, rsp); 390 391 lro_mgr->lro_merged++; 392 393 return 0; 394 395 out: 396 return -1; 397 } 398 399 static int 400 cxgbit_uld_lro_rx_handler(void *hndl, const __be64 *rsp, 401 const struct pkt_gl *gl, struct t4_lro_mgr *lro_mgr, 402 struct napi_struct *napi) 403 { 404 struct cxgbit_device *cdev = hndl; 405 struct cxgb4_lld_info *lldi = &cdev->lldi; 406 struct cpl_tx_data *rpl = NULL; 407 struct cxgbit_sock *csk = NULL; 408 unsigned int tid = 0; 409 struct sk_buff *skb; 410 unsigned int op = *(u8 *)rsp; 411 bool lro_flush = true; 412 413 switch (op) { 414 case CPL_ISCSI_HDR: 415 case CPL_ISCSI_DATA: 416 case CPL_RX_ISCSI_DDP: 417 case CPL_FW4_ACK: 418 lro_flush = false; 419 case CPL_ABORT_RPL_RSS: 420 case CPL_PASS_ESTABLISH: 421 case CPL_PEER_CLOSE: 422 case CPL_CLOSE_CON_RPL: 423 case CPL_ABORT_REQ_RSS: 424 case CPL_SET_TCB_RPL: 425 case CPL_RX_DATA: 426 rpl = gl ? (struct cpl_tx_data *)gl->va : 427 (struct cpl_tx_data *)(rsp + 1); 428 tid = GET_TID(rpl); 429 csk = lookup_tid(lldi->tids, tid); 430 break; 431 default: 432 break; 433 } 434 435 if (csk && csk->lro_skb && lro_flush) 436 cxgbit_lro_flush(lro_mgr, csk->lro_skb); 437 438 if (!gl) { 439 unsigned int len; 440 441 if (op == CPL_RX_ISCSI_DDP) { 442 if (!cxgbit_lro_receive(csk, op, rsp, NULL, lro_mgr, 443 napi)) 444 return 0; 445 } 446 447 len = 64 - sizeof(struct rsp_ctrl) - 8; 448 skb = napi_alloc_skb(napi, len); 449 if (!skb) 450 goto nomem; 451 __skb_put(skb, len); 452 skb_copy_to_linear_data(skb, &rsp[1], len); 453 } else { 454 if (unlikely(op != *(u8 *)gl->va)) { 455 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 456 gl->va, be64_to_cpu(*rsp), 457 be64_to_cpu(*(u64 *)gl->va), 458 gl->tot_len); 459 return 0; 460 } 461 462 if (op == CPL_ISCSI_HDR || op == CPL_ISCSI_DATA) { 463 if (!cxgbit_lro_receive(csk, op, rsp, gl, lro_mgr, 464 napi)) 465 return 0; 466 } 467 468 #define RX_PULL_LEN 128 469 skb = cxgb4_pktgl_to_skb(gl, RX_PULL_LEN, RX_PULL_LEN); 470 if (unlikely(!skb)) 471 goto nomem; 472 } 473 474 rpl = (struct cpl_tx_data *)skb->data; 475 op = rpl->ot.opcode; 476 cxgbit_skcb_rx_opcode(skb) = op; 477 478 pr_debug("cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 479 cdev, op, rpl->ot.opcode_tid, 480 ntohl(rpl->ot.opcode_tid), skb); 481 482 if (op < NUM_CPL_CMDS && cxgbit_cplhandlers[op]) { 483 cxgbit_cplhandlers[op](cdev, skb); 484 } else { 485 pr_err("No handler for opcode 0x%x.\n", op); 486 __kfree_skb(skb); 487 } 488 return 0; 489 nomem: 490 pr_err("%s OOM bailing out.\n", __func__); 491 return 1; 492 } 493 494 #ifdef CONFIG_CHELSIO_T4_DCB 495 struct cxgbit_dcb_work { 496 struct dcb_app_type dcb_app; 497 struct work_struct work; 498 }; 499 500 static void 501 cxgbit_update_dcb_priority(struct cxgbit_device *cdev, u8 port_id, 502 u8 dcb_priority, u16 port_num) 503 { 504 struct cxgbit_sock *csk; 505 struct sk_buff *skb; 506 u16 local_port; 507 bool wakeup_thread = false; 508 509 spin_lock_bh(&cdev->cskq.lock); 510 list_for_each_entry(csk, &cdev->cskq.list, list) { 511 if (csk->port_id != port_id) 512 continue; 513 514 if (csk->com.local_addr.ss_family == AF_INET6) { 515 struct sockaddr_in6 *sock_in6; 516 517 sock_in6 = (struct sockaddr_in6 *)&csk->com.local_addr; 518 local_port = ntohs(sock_in6->sin6_port); 519 } else { 520 struct sockaddr_in *sock_in; 521 522 sock_in = (struct sockaddr_in *)&csk->com.local_addr; 523 local_port = ntohs(sock_in->sin_port); 524 } 525 526 if (local_port != port_num) 527 continue; 528 529 if (csk->dcb_priority == dcb_priority) 530 continue; 531 532 skb = alloc_skb(0, GFP_ATOMIC); 533 if (!skb) 534 continue; 535 536 spin_lock(&csk->rxq.lock); 537 __skb_queue_tail(&csk->rxq, skb); 538 if (skb_queue_len(&csk->rxq) == 1) 539 wakeup_thread = true; 540 spin_unlock(&csk->rxq.lock); 541 542 if (wakeup_thread) { 543 wake_up(&csk->waitq); 544 wakeup_thread = false; 545 } 546 } 547 spin_unlock_bh(&cdev->cskq.lock); 548 } 549 550 static void cxgbit_dcb_workfn(struct work_struct *work) 551 { 552 struct cxgbit_dcb_work *dcb_work; 553 struct net_device *ndev; 554 struct cxgbit_device *cdev = NULL; 555 struct dcb_app_type *iscsi_app; 556 u8 priority, port_id = 0xff; 557 558 dcb_work = container_of(work, struct cxgbit_dcb_work, work); 559 iscsi_app = &dcb_work->dcb_app; 560 561 if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_IEEE) { 562 if (iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_ANY) 563 goto out; 564 565 priority = iscsi_app->app.priority; 566 567 } else if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_CEE) { 568 if (iscsi_app->app.selector != DCB_APP_IDTYPE_PORTNUM) 569 goto out; 570 571 if (!iscsi_app->app.priority) 572 goto out; 573 574 priority = ffs(iscsi_app->app.priority) - 1; 575 } else { 576 goto out; 577 } 578 579 pr_debug("priority for ifid %d is %u\n", 580 iscsi_app->ifindex, priority); 581 582 ndev = dev_get_by_index(&init_net, iscsi_app->ifindex); 583 584 if (!ndev) 585 goto out; 586 587 mutex_lock(&cdev_list_lock); 588 cdev = cxgbit_find_device(ndev, &port_id); 589 590 dev_put(ndev); 591 592 if (!cdev) { 593 mutex_unlock(&cdev_list_lock); 594 goto out; 595 } 596 597 cxgbit_update_dcb_priority(cdev, port_id, priority, 598 iscsi_app->app.protocol); 599 mutex_unlock(&cdev_list_lock); 600 out: 601 kfree(dcb_work); 602 } 603 604 static int 605 cxgbit_dcbevent_notify(struct notifier_block *nb, unsigned long action, 606 void *data) 607 { 608 struct cxgbit_dcb_work *dcb_work; 609 struct dcb_app_type *dcb_app = data; 610 611 dcb_work = kzalloc(sizeof(*dcb_work), GFP_ATOMIC); 612 if (!dcb_work) 613 return NOTIFY_DONE; 614 615 dcb_work->dcb_app = *dcb_app; 616 INIT_WORK(&dcb_work->work, cxgbit_dcb_workfn); 617 schedule_work(&dcb_work->work); 618 return NOTIFY_OK; 619 } 620 #endif 621 622 static enum target_prot_op cxgbit_get_sup_prot_ops(struct iscsi_conn *conn) 623 { 624 return TARGET_PROT_NORMAL; 625 } 626 627 static struct iscsit_transport cxgbit_transport = { 628 .name = DRV_NAME, 629 .transport_type = ISCSI_CXGBIT, 630 .rdma_shutdown = false, 631 .priv_size = sizeof(struct cxgbit_cmd), 632 .owner = THIS_MODULE, 633 .iscsit_setup_np = cxgbit_setup_np, 634 .iscsit_accept_np = cxgbit_accept_np, 635 .iscsit_free_np = cxgbit_free_np, 636 .iscsit_free_conn = cxgbit_free_conn, 637 .iscsit_get_login_rx = cxgbit_get_login_rx, 638 .iscsit_put_login_tx = cxgbit_put_login_tx, 639 .iscsit_immediate_queue = iscsit_immediate_queue, 640 .iscsit_response_queue = iscsit_response_queue, 641 .iscsit_get_dataout = iscsit_build_r2ts_for_cmd, 642 .iscsit_queue_data_in = iscsit_queue_rsp, 643 .iscsit_queue_status = iscsit_queue_rsp, 644 .iscsit_xmit_pdu = cxgbit_xmit_pdu, 645 .iscsit_get_r2t_ttt = cxgbit_get_r2t_ttt, 646 .iscsit_get_rx_pdu = cxgbit_get_rx_pdu, 647 .iscsit_validate_params = cxgbit_validate_params, 648 .iscsit_release_cmd = cxgbit_release_cmd, 649 .iscsit_aborted_task = iscsit_aborted_task, 650 .iscsit_get_sup_prot_ops = cxgbit_get_sup_prot_ops, 651 }; 652 653 static struct cxgb4_uld_info cxgbit_uld_info = { 654 .name = DRV_NAME, 655 .nrxq = MAX_ULD_QSETS, 656 .ntxq = MAX_ULD_QSETS, 657 .rxq_size = 1024, 658 .lro = true, 659 .add = cxgbit_uld_add, 660 .state_change = cxgbit_uld_state_change, 661 .lro_rx_handler = cxgbit_uld_lro_rx_handler, 662 .lro_flush = cxgbit_uld_lro_flush, 663 }; 664 665 #ifdef CONFIG_CHELSIO_T4_DCB 666 static struct notifier_block cxgbit_dcbevent_nb = { 667 .notifier_call = cxgbit_dcbevent_notify, 668 }; 669 #endif 670 671 static int __init cxgbit_init(void) 672 { 673 cxgb4_register_uld(CXGB4_ULD_ISCSIT, &cxgbit_uld_info); 674 iscsit_register_transport(&cxgbit_transport); 675 676 #ifdef CONFIG_CHELSIO_T4_DCB 677 pr_info("%s dcb enabled.\n", DRV_NAME); 678 register_dcbevent_notifier(&cxgbit_dcbevent_nb); 679 #endif 680 BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, cb) < 681 sizeof(union cxgbit_skb_cb)); 682 return 0; 683 } 684 685 static void __exit cxgbit_exit(void) 686 { 687 struct cxgbit_device *cdev, *tmp; 688 689 #ifdef CONFIG_CHELSIO_T4_DCB 690 unregister_dcbevent_notifier(&cxgbit_dcbevent_nb); 691 #endif 692 mutex_lock(&cdev_list_lock); 693 list_for_each_entry_safe(cdev, tmp, &cdev_list_head, list) { 694 list_del(&cdev->list); 695 cxgbit_put_cdev(cdev); 696 } 697 mutex_unlock(&cdev_list_lock); 698 iscsit_unregister_transport(&cxgbit_transport); 699 cxgb4_unregister_uld(CXGB4_ULD_ISCSIT); 700 } 701 702 module_init(cxgbit_init); 703 module_exit(cxgbit_exit); 704 705 MODULE_DESCRIPTION("Chelsio iSCSI target offload driver"); 706 MODULE_AUTHOR("Chelsio Communications"); 707 MODULE_VERSION(DRV_VERSION); 708 MODULE_LICENSE("GPL"); 709