1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Copyright (c) 2016 Chelsio Communications, Inc. 4 */ 5 6#define DRV_NAME "cxgbit" 7#define DRV_VERSION "1.0.0-ko" 8#define pr_fmt(fmt) DRV_NAME ": " fmt 9 10#include "cxgbit.h" 11 12#ifdef CONFIG_CHELSIO_T4_DCB 13#include <net/dcbevent.h> 14#include "cxgb4_dcb.h" 15#endif 16 17LIST_HEAD(cdev_list_head); 18/* cdev list lock */ 19DEFINE_MUTEX(cdev_list_lock); 20 21void _cxgbit_free_cdev(struct kref *kref) 22{ 23 struct cxgbit_device *cdev; 24 25 cdev = container_of(kref, struct cxgbit_device, kref); 26 27 cxgbi_ppm_release(cdev2ppm(cdev)); 28 kfree(cdev); 29} 30 31static void cxgbit_set_mdsl(struct cxgbit_device *cdev) 32{ 33 struct cxgb4_lld_info *lldi = &cdev->lldi; 34 u32 mdsl; 35 36#define ULP2_MAX_PKT_LEN 16224 37#define ISCSI_PDU_NONPAYLOAD_LEN 312 38 mdsl = min_t(u32, lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN, 39 ULP2_MAX_PKT_LEN - ISCSI_PDU_NONPAYLOAD_LEN); 40 mdsl = min_t(u32, mdsl, 8192); 41 mdsl = min_t(u32, mdsl, (MAX_SKB_FRAGS - 1) * PAGE_SIZE); 42 43 cdev->mdsl = mdsl; 44} 45 46static void *cxgbit_uld_add(const struct cxgb4_lld_info *lldi) 47{ 48 struct cxgbit_device *cdev; 49 50 if (is_t4(lldi->adapter_type)) 51 return ERR_PTR(-ENODEV); 52 53 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); 54 if (!cdev) 55 return ERR_PTR(-ENOMEM); 56 57 kref_init(&cdev->kref); 58 spin_lock_init(&cdev->np_lock); 59 60 cdev->lldi = *lldi; 61 62 cxgbit_set_mdsl(cdev); 63 64 if (cxgbit_ddp_init(cdev) < 0) { 65 kfree(cdev); 66 return ERR_PTR(-EINVAL); 67 } 68 69 if (!test_bit(CDEV_DDP_ENABLE, &cdev->flags)) 70 pr_info("cdev %s ddp init failed\n", 71 pci_name(lldi->pdev)); 72 73 if (lldi->fw_vers >= 0x10d2b00) 74 set_bit(CDEV_ISO_ENABLE, &cdev->flags); 75 76 spin_lock_init(&cdev->cskq.lock); 77 INIT_LIST_HEAD(&cdev->cskq.list); 78 79 mutex_lock(&cdev_list_lock); 80 list_add_tail(&cdev->list, &cdev_list_head); 81 mutex_unlock(&cdev_list_lock); 82 83 pr_info("cdev %s added for iSCSI target transport\n", 84 pci_name(lldi->pdev)); 85 86 return cdev; 87} 88 89static void cxgbit_close_conn(struct cxgbit_device *cdev) 90{ 91 struct cxgbit_sock *csk; 92 struct sk_buff *skb; 93 bool wakeup_thread = false; 94 95 spin_lock_bh(&cdev->cskq.lock); 96 list_for_each_entry(csk, &cdev->cskq.list, list) { 97 skb = alloc_skb(0, GFP_ATOMIC); 98 if (!skb) 99 continue; 100 101 spin_lock_bh(&csk->rxq.lock); 102 __skb_queue_tail(&csk->rxq, skb); 103 if (skb_queue_len(&csk->rxq) == 1) 104 wakeup_thread = true; 105 spin_unlock_bh(&csk->rxq.lock); 106 107 if (wakeup_thread) { 108 wake_up(&csk->waitq); 109 wakeup_thread = false; 110 } 111 } 112 spin_unlock_bh(&cdev->cskq.lock); 113} 114 115static void cxgbit_detach_cdev(struct cxgbit_device *cdev) 116{ 117 bool free_cdev = false; 118 119 spin_lock_bh(&cdev->cskq.lock); 120 if (list_empty(&cdev->cskq.list)) 121 free_cdev = true; 122 spin_unlock_bh(&cdev->cskq.lock); 123 124 if (free_cdev) { 125 mutex_lock(&cdev_list_lock); 126 list_del(&cdev->list); 127 mutex_unlock(&cdev_list_lock); 128 129 cxgbit_put_cdev(cdev); 130 } else { 131 cxgbit_close_conn(cdev); 132 } 133} 134 135static int cxgbit_uld_state_change(void *handle, enum cxgb4_state state) 136{ 137 struct cxgbit_device *cdev = handle; 138 139 switch (state) { 140 case CXGB4_STATE_UP: 141 set_bit(CDEV_STATE_UP, &cdev->flags); 142 pr_info("cdev %s state UP.\n", pci_name(cdev->lldi.pdev)); 143 break; 144 case CXGB4_STATE_START_RECOVERY: 145 clear_bit(CDEV_STATE_UP, &cdev->flags); 146 cxgbit_close_conn(cdev); 147 pr_info("cdev %s state RECOVERY.\n", pci_name(cdev->lldi.pdev)); 148 break; 149 case CXGB4_STATE_DOWN: 150 pr_info("cdev %s state DOWN.\n", pci_name(cdev->lldi.pdev)); 151 break; 152 case CXGB4_STATE_DETACH: 153 clear_bit(CDEV_STATE_UP, &cdev->flags); 154 pr_info("cdev %s state DETACH.\n", pci_name(cdev->lldi.pdev)); 155 cxgbit_detach_cdev(cdev); 156 break; 157 default: 158 pr_info("cdev %s unknown state %d.\n", 159 pci_name(cdev->lldi.pdev), state); 160 break; 161 } 162 return 0; 163} 164 165static void 166cxgbit_process_ddpvld(struct cxgbit_sock *csk, struct cxgbit_lro_pdu_cb *pdu_cb, 167 u32 ddpvld) 168{ 169 170 if (ddpvld & (1 << CPL_RX_ISCSI_DDP_STATUS_HCRC_SHIFT)) { 171 pr_info("tid 0x%x, status 0x%x, hcrc bad.\n", csk->tid, ddpvld); 172 pdu_cb->flags |= PDUCBF_RX_HCRC_ERR; 173 } 174 175 if (ddpvld & (1 << CPL_RX_ISCSI_DDP_STATUS_DCRC_SHIFT)) { 176 pr_info("tid 0x%x, status 0x%x, dcrc bad.\n", csk->tid, ddpvld); 177 pdu_cb->flags |= PDUCBF_RX_DCRC_ERR; 178 } 179 180 if (ddpvld & (1 << CPL_RX_ISCSI_DDP_STATUS_PAD_SHIFT)) 181 pr_info("tid 0x%x, status 0x%x, pad bad.\n", csk->tid, ddpvld); 182 183 if ((ddpvld & (1 << CPL_RX_ISCSI_DDP_STATUS_DDP_SHIFT)) && 184 (!(pdu_cb->flags & PDUCBF_RX_DATA))) { 185 pdu_cb->flags |= PDUCBF_RX_DATA_DDPD; 186 } 187} 188 189static void 190cxgbit_lro_add_packet_rsp(struct sk_buff *skb, u8 op, const __be64 *rsp) 191{ 192 struct cxgbit_lro_cb *lro_cb = cxgbit_skb_lro_cb(skb); 193 struct cxgbit_lro_pdu_cb *pdu_cb = cxgbit_skb_lro_pdu_cb(skb, 194 lro_cb->pdu_idx); 195 struct cpl_rx_iscsi_ddp *cpl = (struct cpl_rx_iscsi_ddp *)(rsp + 1); 196 197 cxgbit_process_ddpvld(lro_cb->csk, pdu_cb, be32_to_cpu(cpl->ddpvld)); 198 199 pdu_cb->flags |= PDUCBF_RX_STATUS; 200 pdu_cb->ddigest = ntohl(cpl->ulp_crc); 201 pdu_cb->pdulen = ntohs(cpl->len); 202 203 if (pdu_cb->flags & PDUCBF_RX_HDR) 204 pdu_cb->complete = true; 205 206 lro_cb->pdu_totallen += pdu_cb->pdulen; 207 lro_cb->complete = true; 208 lro_cb->pdu_idx++; 209} 210 211static void 212cxgbit_copy_frags(struct sk_buff *skb, const struct pkt_gl *gl, 213 unsigned int offset) 214{ 215 u8 skb_frag_idx = skb_shinfo(skb)->nr_frags; 216 u8 i; 217 218 /* usually there's just one frag */ 219 __skb_fill_page_desc(skb, skb_frag_idx, gl->frags[0].page, 220 gl->frags[0].offset + offset, 221 gl->frags[0].size - offset); 222 for (i = 1; i < gl->nfrags; i++) 223 __skb_fill_page_desc(skb, skb_frag_idx + i, 224 gl->frags[i].page, 225 gl->frags[i].offset, 226 gl->frags[i].size); 227 228 skb_shinfo(skb)->nr_frags += gl->nfrags; 229 230 /* get a reference to the last page, we don't own it */ 231 get_page(gl->frags[gl->nfrags - 1].page); 232} 233 234static void 235cxgbit_lro_add_packet_gl(struct sk_buff *skb, u8 op, const struct pkt_gl *gl) 236{ 237 struct cxgbit_lro_cb *lro_cb = cxgbit_skb_lro_cb(skb); 238 struct cxgbit_lro_pdu_cb *pdu_cb = cxgbit_skb_lro_pdu_cb(skb, 239 lro_cb->pdu_idx); 240 u32 len, offset; 241 242 if (op == CPL_ISCSI_HDR) { 243 struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)gl->va; 244 245 offset = sizeof(struct cpl_iscsi_hdr); 246 pdu_cb->flags |= PDUCBF_RX_HDR; 247 pdu_cb->seq = ntohl(cpl->seq); 248 len = ntohs(cpl->len); 249 pdu_cb->hdr = gl->va + offset; 250 pdu_cb->hlen = len; 251 pdu_cb->hfrag_idx = skb_shinfo(skb)->nr_frags; 252 253 if (unlikely(gl->nfrags > 1)) 254 cxgbit_skcb_flags(skb) = 0; 255 256 lro_cb->complete = false; 257 } else if (op == CPL_ISCSI_DATA) { 258 struct cpl_iscsi_data *cpl = (struct cpl_iscsi_data *)gl->va; 259 260 offset = sizeof(struct cpl_iscsi_data); 261 pdu_cb->flags |= PDUCBF_RX_DATA; 262 len = ntohs(cpl->len); 263 pdu_cb->dlen = len; 264 pdu_cb->doffset = lro_cb->offset; 265 pdu_cb->nr_dfrags = gl->nfrags; 266 pdu_cb->dfrag_idx = skb_shinfo(skb)->nr_frags; 267 lro_cb->complete = false; 268 } else { 269 struct cpl_rx_iscsi_cmp *cpl; 270 271 cpl = (struct cpl_rx_iscsi_cmp *)gl->va; 272 offset = sizeof(struct cpl_rx_iscsi_cmp); 273 pdu_cb->flags |= (PDUCBF_RX_HDR | PDUCBF_RX_STATUS); 274 len = be16_to_cpu(cpl->len); 275 pdu_cb->hdr = gl->va + offset; 276 pdu_cb->hlen = len; 277 pdu_cb->hfrag_idx = skb_shinfo(skb)->nr_frags; 278 pdu_cb->ddigest = be32_to_cpu(cpl->ulp_crc); 279 pdu_cb->pdulen = ntohs(cpl->len); 280 281 if (unlikely(gl->nfrags > 1)) 282 cxgbit_skcb_flags(skb) = 0; 283 284 cxgbit_process_ddpvld(lro_cb->csk, pdu_cb, 285 be32_to_cpu(cpl->ddpvld)); 286 287 if (pdu_cb->flags & PDUCBF_RX_DATA_DDPD) { 288 pdu_cb->flags |= PDUCBF_RX_DDP_CMP; 289 pdu_cb->complete = true; 290 } else if (pdu_cb->flags & PDUCBF_RX_DATA) { 291 pdu_cb->complete = true; 292 } 293 294 lro_cb->pdu_totallen += pdu_cb->hlen + pdu_cb->dlen; 295 lro_cb->complete = true; 296 lro_cb->pdu_idx++; 297 } 298 299 cxgbit_copy_frags(skb, gl, offset); 300 301 pdu_cb->frags += gl->nfrags; 302 lro_cb->offset += len; 303 skb->len += len; 304 skb->data_len += len; 305 skb->truesize += len; 306} 307 308static struct sk_buff * 309cxgbit_lro_init_skb(struct cxgbit_sock *csk, u8 op, const struct pkt_gl *gl, 310 const __be64 *rsp, struct napi_struct *napi) 311{ 312 struct sk_buff *skb; 313 struct cxgbit_lro_cb *lro_cb; 314 315 skb = napi_alloc_skb(napi, LRO_SKB_MAX_HEADROOM); 316 317 if (unlikely(!skb)) 318 return NULL; 319 320 memset(skb->data, 0, LRO_SKB_MAX_HEADROOM); 321 322 cxgbit_skcb_flags(skb) |= SKCBF_RX_LRO; 323 324 lro_cb = cxgbit_skb_lro_cb(skb); 325 326 cxgbit_get_csk(csk); 327 328 lro_cb->csk = csk; 329 330 return skb; 331} 332 333static void cxgbit_queue_lro_skb(struct cxgbit_sock *csk, struct sk_buff *skb) 334{ 335 bool wakeup_thread = false; 336 337 spin_lock(&csk->rxq.lock); 338 __skb_queue_tail(&csk->rxq, skb); 339 if (skb_queue_len(&csk->rxq) == 1) 340 wakeup_thread = true; 341 spin_unlock(&csk->rxq.lock); 342 343 if (wakeup_thread) 344 wake_up(&csk->waitq); 345} 346 347static void cxgbit_lro_flush(struct t4_lro_mgr *lro_mgr, struct sk_buff *skb) 348{ 349 struct cxgbit_lro_cb *lro_cb = cxgbit_skb_lro_cb(skb); 350 struct cxgbit_sock *csk = lro_cb->csk; 351 352 csk->lro_skb = NULL; 353 354 __skb_unlink(skb, &lro_mgr->lroq); 355 cxgbit_queue_lro_skb(csk, skb); 356 357 cxgbit_put_csk(csk); 358 359 lro_mgr->lro_pkts++; 360 lro_mgr->lro_session_cnt--; 361} 362 363static void cxgbit_uld_lro_flush(struct t4_lro_mgr *lro_mgr) 364{ 365 struct sk_buff *skb; 366 367 while ((skb = skb_peek(&lro_mgr->lroq))) 368 cxgbit_lro_flush(lro_mgr, skb); 369} 370 371static int 372cxgbit_lro_receive(struct cxgbit_sock *csk, u8 op, const __be64 *rsp, 373 const struct pkt_gl *gl, struct t4_lro_mgr *lro_mgr, 374 struct napi_struct *napi) 375{ 376 struct sk_buff *skb; 377 struct cxgbit_lro_cb *lro_cb; 378 379 if (!csk) { 380 pr_err("%s: csk NULL, op 0x%x.\n", __func__, op); 381 goto out; 382 } 383 384 if (csk->lro_skb) 385 goto add_packet; 386 387start_lro: 388 if (lro_mgr->lro_session_cnt >= MAX_LRO_SESSIONS) { 389 cxgbit_uld_lro_flush(lro_mgr); 390 goto start_lro; 391 } 392 393 skb = cxgbit_lro_init_skb(csk, op, gl, rsp, napi); 394 if (unlikely(!skb)) 395 goto out; 396 397 csk->lro_skb = skb; 398 399 __skb_queue_tail(&lro_mgr->lroq, skb); 400 lro_mgr->lro_session_cnt++; 401 402add_packet: 403 skb = csk->lro_skb; 404 lro_cb = cxgbit_skb_lro_cb(skb); 405 406 if ((gl && (((skb_shinfo(skb)->nr_frags + gl->nfrags) > 407 MAX_SKB_FRAGS) || (lro_cb->pdu_totallen >= LRO_FLUSH_LEN_MAX))) || 408 (lro_cb->pdu_idx >= MAX_SKB_FRAGS)) { 409 cxgbit_lro_flush(lro_mgr, skb); 410 goto start_lro; 411 } 412 413 if (gl) 414 cxgbit_lro_add_packet_gl(skb, op, gl); 415 else 416 cxgbit_lro_add_packet_rsp(skb, op, rsp); 417 418 lro_mgr->lro_merged++; 419 420 return 0; 421 422out: 423 return -1; 424} 425 426static int 427cxgbit_uld_lro_rx_handler(void *hndl, const __be64 *rsp, 428 const struct pkt_gl *gl, struct t4_lro_mgr *lro_mgr, 429 struct napi_struct *napi) 430{ 431 struct cxgbit_device *cdev = hndl; 432 struct cxgb4_lld_info *lldi = &cdev->lldi; 433 struct cpl_tx_data *rpl = NULL; 434 struct cxgbit_sock *csk = NULL; 435 unsigned int tid = 0; 436 struct sk_buff *skb; 437 unsigned int op = *(u8 *)rsp; 438 bool lro_flush = true; 439 440 switch (op) { 441 case CPL_ISCSI_HDR: 442 case CPL_ISCSI_DATA: 443 case CPL_RX_ISCSI_CMP: 444 case CPL_RX_ISCSI_DDP: 445 case CPL_FW4_ACK: 446 lro_flush = false; 447 fallthrough; 448 case CPL_ABORT_RPL_RSS: 449 case CPL_PASS_ESTABLISH: 450 case CPL_PEER_CLOSE: 451 case CPL_CLOSE_CON_RPL: 452 case CPL_ABORT_REQ_RSS: 453 case CPL_SET_TCB_RPL: 454 case CPL_RX_DATA: 455 rpl = gl ? (struct cpl_tx_data *)gl->va : 456 (struct cpl_tx_data *)(rsp + 1); 457 tid = GET_TID(rpl); 458 csk = lookup_tid(lldi->tids, tid); 459 break; 460 default: 461 break; 462 } 463 464 if (csk && csk->lro_skb && lro_flush) 465 cxgbit_lro_flush(lro_mgr, csk->lro_skb); 466 467 if (!gl) { 468 unsigned int len; 469 470 if (op == CPL_RX_ISCSI_DDP) { 471 if (!cxgbit_lro_receive(csk, op, rsp, NULL, lro_mgr, 472 napi)) 473 return 0; 474 } 475 476 len = 64 - sizeof(struct rsp_ctrl) - 8; 477 skb = napi_alloc_skb(napi, len); 478 if (!skb) 479 goto nomem; 480 __skb_put(skb, len); 481 skb_copy_to_linear_data(skb, &rsp[1], len); 482 } else { 483 if (unlikely(op != *(u8 *)gl->va)) { 484 pr_info("? FL 0x%p,RSS%#llx,FL %#llx,len %u.\n", 485 gl->va, be64_to_cpu(*rsp), 486 get_unaligned_be64(gl->va), 487 gl->tot_len); 488 return 0; 489 } 490 491 if ((op == CPL_ISCSI_HDR) || (op == CPL_ISCSI_DATA) || 492 (op == CPL_RX_ISCSI_CMP)) { 493 if (!cxgbit_lro_receive(csk, op, rsp, gl, lro_mgr, 494 napi)) 495 return 0; 496 } 497 498#define RX_PULL_LEN 128 499 skb = cxgb4_pktgl_to_skb(gl, RX_PULL_LEN, RX_PULL_LEN); 500 if (unlikely(!skb)) 501 goto nomem; 502 } 503 504 rpl = (struct cpl_tx_data *)skb->data; 505 op = rpl->ot.opcode; 506 cxgbit_skcb_rx_opcode(skb) = op; 507 508 pr_debug("cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n", 509 cdev, op, rpl->ot.opcode_tid, 510 ntohl(rpl->ot.opcode_tid), skb); 511 512 if (op < NUM_CPL_CMDS && cxgbit_cplhandlers[op]) { 513 cxgbit_cplhandlers[op](cdev, skb); 514 } else { 515 pr_err("No handler for opcode 0x%x.\n", op); 516 __kfree_skb(skb); 517 } 518 return 0; 519nomem: 520 pr_err("%s OOM bailing out.\n", __func__); 521 return 1; 522} 523 524#ifdef CONFIG_CHELSIO_T4_DCB 525struct cxgbit_dcb_work { 526 struct dcb_app_type dcb_app; 527 struct work_struct work; 528}; 529 530static void 531cxgbit_update_dcb_priority(struct cxgbit_device *cdev, u8 port_id, 532 u8 dcb_priority, u16 port_num) 533{ 534 struct cxgbit_sock *csk; 535 struct sk_buff *skb; 536 u16 local_port; 537 bool wakeup_thread = false; 538 539 spin_lock_bh(&cdev->cskq.lock); 540 list_for_each_entry(csk, &cdev->cskq.list, list) { 541 if (csk->port_id != port_id) 542 continue; 543 544 if (csk->com.local_addr.ss_family == AF_INET6) { 545 struct sockaddr_in6 *sock_in6; 546 547 sock_in6 = (struct sockaddr_in6 *)&csk->com.local_addr; 548 local_port = ntohs(sock_in6->sin6_port); 549 } else { 550 struct sockaddr_in *sock_in; 551 552 sock_in = (struct sockaddr_in *)&csk->com.local_addr; 553 local_port = ntohs(sock_in->sin_port); 554 } 555 556 if (local_port != port_num) 557 continue; 558 559 if (csk->dcb_priority == dcb_priority) 560 continue; 561 562 skb = alloc_skb(0, GFP_ATOMIC); 563 if (!skb) 564 continue; 565 566 spin_lock(&csk->rxq.lock); 567 __skb_queue_tail(&csk->rxq, skb); 568 if (skb_queue_len(&csk->rxq) == 1) 569 wakeup_thread = true; 570 spin_unlock(&csk->rxq.lock); 571 572 if (wakeup_thread) { 573 wake_up(&csk->waitq); 574 wakeup_thread = false; 575 } 576 } 577 spin_unlock_bh(&cdev->cskq.lock); 578} 579 580static void cxgbit_dcb_workfn(struct work_struct *work) 581{ 582 struct cxgbit_dcb_work *dcb_work; 583 struct net_device *ndev; 584 struct cxgbit_device *cdev = NULL; 585 struct dcb_app_type *iscsi_app; 586 u8 priority, port_id = 0xff; 587 588 dcb_work = container_of(work, struct cxgbit_dcb_work, work); 589 iscsi_app = &dcb_work->dcb_app; 590 591 if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_IEEE) { 592 if ((iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_STREAM) && 593 (iscsi_app->app.selector != IEEE_8021QAZ_APP_SEL_ANY)) 594 goto out; 595 596 priority = iscsi_app->app.priority; 597 598 } else if (iscsi_app->dcbx & DCB_CAP_DCBX_VER_CEE) { 599 if (iscsi_app->app.selector != DCB_APP_IDTYPE_PORTNUM) 600 goto out; 601 602 if (!iscsi_app->app.priority) 603 goto out; 604 605 priority = ffs(iscsi_app->app.priority) - 1; 606 } else { 607 goto out; 608 } 609 610 pr_debug("priority for ifid %d is %u\n", 611 iscsi_app->ifindex, priority); 612 613 ndev = dev_get_by_index(&init_net, iscsi_app->ifindex); 614 615 if (!ndev) 616 goto out; 617 618 mutex_lock(&cdev_list_lock); 619 cdev = cxgbit_find_device(ndev, &port_id); 620 621 dev_put(ndev); 622 623 if (!cdev) { 624 mutex_unlock(&cdev_list_lock); 625 goto out; 626 } 627 628 cxgbit_update_dcb_priority(cdev, port_id, priority, 629 iscsi_app->app.protocol); 630 mutex_unlock(&cdev_list_lock); 631out: 632 kfree(dcb_work); 633} 634 635static int 636cxgbit_dcbevent_notify(struct notifier_block *nb, unsigned long action, 637 void *data) 638{ 639 struct cxgbit_dcb_work *dcb_work; 640 struct dcb_app_type *dcb_app = data; 641 642 dcb_work = kzalloc(sizeof(*dcb_work), GFP_ATOMIC); 643 if (!dcb_work) 644 return NOTIFY_DONE; 645 646 dcb_work->dcb_app = *dcb_app; 647 INIT_WORK(&dcb_work->work, cxgbit_dcb_workfn); 648 schedule_work(&dcb_work->work); 649 return NOTIFY_OK; 650} 651#endif 652 653static enum target_prot_op cxgbit_get_sup_prot_ops(struct iscsi_conn *conn) 654{ 655 return TARGET_PROT_NORMAL; 656} 657 658static struct iscsit_transport cxgbit_transport = { 659 .name = DRV_NAME, 660 .transport_type = ISCSI_CXGBIT, 661 .rdma_shutdown = false, 662 .priv_size = sizeof(struct cxgbit_cmd), 663 .owner = THIS_MODULE, 664 .iscsit_setup_np = cxgbit_setup_np, 665 .iscsit_accept_np = cxgbit_accept_np, 666 .iscsit_free_np = cxgbit_free_np, 667 .iscsit_free_conn = cxgbit_free_conn, 668 .iscsit_get_login_rx = cxgbit_get_login_rx, 669 .iscsit_put_login_tx = cxgbit_put_login_tx, 670 .iscsit_immediate_queue = iscsit_immediate_queue, 671 .iscsit_response_queue = iscsit_response_queue, 672 .iscsit_get_dataout = iscsit_build_r2ts_for_cmd, 673 .iscsit_queue_data_in = iscsit_queue_rsp, 674 .iscsit_queue_status = iscsit_queue_rsp, 675 .iscsit_xmit_pdu = cxgbit_xmit_pdu, 676 .iscsit_get_r2t_ttt = cxgbit_get_r2t_ttt, 677 .iscsit_get_rx_pdu = cxgbit_get_rx_pdu, 678 .iscsit_validate_params = cxgbit_validate_params, 679 .iscsit_unmap_cmd = cxgbit_unmap_cmd, 680 .iscsit_aborted_task = iscsit_aborted_task, 681 .iscsit_get_sup_prot_ops = cxgbit_get_sup_prot_ops, 682}; 683 684static struct cxgb4_uld_info cxgbit_uld_info = { 685 .name = DRV_NAME, 686 .nrxq = MAX_ULD_QSETS, 687 .ntxq = MAX_ULD_QSETS, 688 .rxq_size = 1024, 689 .lro = true, 690 .add = cxgbit_uld_add, 691 .state_change = cxgbit_uld_state_change, 692 .lro_rx_handler = cxgbit_uld_lro_rx_handler, 693 .lro_flush = cxgbit_uld_lro_flush, 694}; 695 696#ifdef CONFIG_CHELSIO_T4_DCB 697static struct notifier_block cxgbit_dcbevent_nb = { 698 .notifier_call = cxgbit_dcbevent_notify, 699}; 700#endif 701 702static int __init cxgbit_init(void) 703{ 704 cxgb4_register_uld(CXGB4_ULD_ISCSIT, &cxgbit_uld_info); 705 iscsit_register_transport(&cxgbit_transport); 706 707#ifdef CONFIG_CHELSIO_T4_DCB 708 pr_info("%s dcb enabled.\n", DRV_NAME); 709 register_dcbevent_notifier(&cxgbit_dcbevent_nb); 710#endif 711 BUILD_BUG_ON(sizeof_field(struct sk_buff, cb) < 712 sizeof(union cxgbit_skb_cb)); 713 return 0; 714} 715 716static void __exit cxgbit_exit(void) 717{ 718 struct cxgbit_device *cdev, *tmp; 719 720#ifdef CONFIG_CHELSIO_T4_DCB 721 unregister_dcbevent_notifier(&cxgbit_dcbevent_nb); 722#endif 723 mutex_lock(&cdev_list_lock); 724 list_for_each_entry_safe(cdev, tmp, &cdev_list_head, list) { 725 list_del(&cdev->list); 726 cxgbit_put_cdev(cdev); 727 } 728 mutex_unlock(&cdev_list_lock); 729 iscsit_unregister_transport(&cxgbit_transport); 730 cxgb4_unregister_uld(CXGB4_ULD_ISCSIT); 731} 732 733module_init(cxgbit_init); 734module_exit(cxgbit_exit); 735 736MODULE_DESCRIPTION("Chelsio iSCSI target offload driver"); 737MODULE_AUTHOR("Chelsio Communications"); 738MODULE_VERSION(DRV_VERSION); 739MODULE_LICENSE("GPL"); 740