1 /* 2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 4 * Copyright (c) 2005 Mellanox Technologies. All rights reserved. 5 * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved. 6 * 7 * This software is available to you under a choice of one of two 8 * licenses. You may choose to be licensed under the terms of the GNU 9 * General Public License (GPL) Version 2, available from the file 10 * COPYING in the main directory of this source tree, or the 11 * OpenIB.org BSD license below: 12 * 13 * Redistribution and use in source and binary forms, with or 14 * without modification, are permitted provided that the following 15 * conditions are met: 16 * 17 * - Redistributions of source code must retain the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer. 20 * 21 * - Redistributions in binary form must reproduce the above 22 * copyright notice, this list of conditions and the following 23 * disclaimer in the documentation and/or other materials 24 * provided with the distribution. 25 * 26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 33 * SOFTWARE. 34 */ 35 36 #include <linux/delay.h> 37 #include <linux/moduleparam.h> 38 #include <linux/dma-mapping.h> 39 #include <linux/slab.h> 40 41 #include <linux/ip.h> 42 #include <linux/tcp.h> 43 #include <rdma/ib_cache.h> 44 45 #include "ipoib.h" 46 47 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA 48 static int data_debug_level; 49 50 module_param(data_debug_level, int, 0644); 51 MODULE_PARM_DESC(data_debug_level, 52 "Enable data path debug tracing if > 0"); 53 #endif 54 55 struct ipoib_ah *ipoib_create_ah(struct net_device *dev, 56 struct ib_pd *pd, struct rdma_ah_attr *attr) 57 { 58 struct ipoib_ah *ah; 59 struct ib_ah *vah; 60 61 ah = kmalloc(sizeof(*ah), GFP_KERNEL); 62 if (!ah) 63 return ERR_PTR(-ENOMEM); 64 65 ah->dev = dev; 66 ah->last_send = 0; 67 kref_init(&ah->ref); 68 69 vah = rdma_create_ah(pd, attr, RDMA_CREATE_AH_SLEEPABLE); 70 if (IS_ERR(vah)) { 71 kfree(ah); 72 ah = (struct ipoib_ah *)vah; 73 } else { 74 ah->ah = vah; 75 ipoib_dbg(ipoib_priv(dev), "Created ah %p\n", ah->ah); 76 } 77 78 return ah; 79 } 80 81 void ipoib_free_ah(struct kref *kref) 82 { 83 struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref); 84 struct ipoib_dev_priv *priv = ipoib_priv(ah->dev); 85 86 unsigned long flags; 87 88 spin_lock_irqsave(&priv->lock, flags); 89 list_add_tail(&ah->list, &priv->dead_ahs); 90 spin_unlock_irqrestore(&priv->lock, flags); 91 } 92 93 static void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv *priv, 94 u64 mapping[IPOIB_UD_RX_SG]) 95 { 96 ib_dma_unmap_single(priv->ca, mapping[0], 97 IPOIB_UD_BUF_SIZE(priv->max_ib_mtu), 98 DMA_FROM_DEVICE); 99 } 100 101 static int ipoib_ib_post_receive(struct net_device *dev, int id) 102 { 103 struct ipoib_dev_priv *priv = ipoib_priv(dev); 104 int ret; 105 106 priv->rx_wr.wr_id = id | IPOIB_OP_RECV; 107 priv->rx_sge[0].addr = priv->rx_ring[id].mapping[0]; 108 priv->rx_sge[1].addr = priv->rx_ring[id].mapping[1]; 109 110 111 ret = ib_post_recv(priv->qp, &priv->rx_wr, NULL); 112 if (unlikely(ret)) { 113 ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret); 114 ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[id].mapping); 115 dev_kfree_skb_any(priv->rx_ring[id].skb); 116 priv->rx_ring[id].skb = NULL; 117 } 118 119 return ret; 120 } 121 122 static struct sk_buff *ipoib_alloc_rx_skb(struct net_device *dev, int id) 123 { 124 struct ipoib_dev_priv *priv = ipoib_priv(dev); 125 struct sk_buff *skb; 126 int buf_size; 127 u64 *mapping; 128 129 buf_size = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu); 130 131 skb = dev_alloc_skb(buf_size + IPOIB_HARD_LEN); 132 if (unlikely(!skb)) 133 return NULL; 134 135 /* 136 * the IP header will be at IPOIP_HARD_LEN + IB_GRH_BYTES, that is 137 * 64 bytes aligned 138 */ 139 skb_reserve(skb, sizeof(struct ipoib_pseudo_header)); 140 141 mapping = priv->rx_ring[id].mapping; 142 mapping[0] = ib_dma_map_single(priv->ca, skb->data, buf_size, 143 DMA_FROM_DEVICE); 144 if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0]))) 145 goto error; 146 147 priv->rx_ring[id].skb = skb; 148 return skb; 149 error: 150 dev_kfree_skb_any(skb); 151 return NULL; 152 } 153 154 static int ipoib_ib_post_receives(struct net_device *dev) 155 { 156 struct ipoib_dev_priv *priv = ipoib_priv(dev); 157 int i; 158 159 for (i = 0; i < ipoib_recvq_size; ++i) { 160 if (!ipoib_alloc_rx_skb(dev, i)) { 161 ipoib_warn(priv, "failed to allocate receive buffer %d\n", i); 162 return -ENOMEM; 163 } 164 if (ipoib_ib_post_receive(dev, i)) { 165 ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); 166 return -EIO; 167 } 168 } 169 170 return 0; 171 } 172 173 static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) 174 { 175 struct ipoib_dev_priv *priv = ipoib_priv(dev); 176 unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV; 177 struct sk_buff *skb; 178 u64 mapping[IPOIB_UD_RX_SG]; 179 union ib_gid *dgid; 180 union ib_gid *sgid; 181 182 ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n", 183 wr_id, wc->status); 184 185 if (unlikely(wr_id >= ipoib_recvq_size)) { 186 ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n", 187 wr_id, ipoib_recvq_size); 188 return; 189 } 190 191 skb = priv->rx_ring[wr_id].skb; 192 193 if (unlikely(wc->status != IB_WC_SUCCESS)) { 194 if (wc->status != IB_WC_WR_FLUSH_ERR) 195 ipoib_warn(priv, 196 "failed recv event (status=%d, wrid=%d vend_err %#x)\n", 197 wc->status, wr_id, wc->vendor_err); 198 ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[wr_id].mapping); 199 dev_kfree_skb_any(skb); 200 priv->rx_ring[wr_id].skb = NULL; 201 return; 202 } 203 204 memcpy(mapping, priv->rx_ring[wr_id].mapping, 205 IPOIB_UD_RX_SG * sizeof(*mapping)); 206 207 /* 208 * If we can't allocate a new RX buffer, dump 209 * this packet and reuse the old buffer. 210 */ 211 if (unlikely(!ipoib_alloc_rx_skb(dev, wr_id))) { 212 ++dev->stats.rx_dropped; 213 goto repost; 214 } 215 216 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", 217 wc->byte_len, wc->slid); 218 219 ipoib_ud_dma_unmap_rx(priv, mapping); 220 221 skb_put(skb, wc->byte_len); 222 223 /* First byte of dgid signals multicast when 0xff */ 224 dgid = &((struct ib_grh *)skb->data)->dgid; 225 226 if (!(wc->wc_flags & IB_WC_GRH) || dgid->raw[0] != 0xff) 227 skb->pkt_type = PACKET_HOST; 228 else if (memcmp(dgid, dev->broadcast + 4, sizeof(union ib_gid)) == 0) 229 skb->pkt_type = PACKET_BROADCAST; 230 else 231 skb->pkt_type = PACKET_MULTICAST; 232 233 sgid = &((struct ib_grh *)skb->data)->sgid; 234 235 /* 236 * Drop packets that this interface sent, ie multicast packets 237 * that the HCA has replicated. 238 */ 239 if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num) { 240 int need_repost = 1; 241 242 if ((wc->wc_flags & IB_WC_GRH) && 243 sgid->global.interface_id != priv->local_gid.global.interface_id) 244 need_repost = 0; 245 246 if (need_repost) { 247 dev_kfree_skb_any(skb); 248 goto repost; 249 } 250 } 251 252 skb_pull(skb, IB_GRH_BYTES); 253 254 skb->protocol = ((struct ipoib_header *) skb->data)->proto; 255 skb_add_pseudo_hdr(skb); 256 257 ++dev->stats.rx_packets; 258 dev->stats.rx_bytes += skb->len; 259 if (skb->pkt_type == PACKET_MULTICAST) 260 dev->stats.multicast++; 261 262 skb->dev = dev; 263 if ((dev->features & NETIF_F_RXCSUM) && 264 likely(wc->wc_flags & IB_WC_IP_CSUM_OK)) 265 skb->ip_summed = CHECKSUM_UNNECESSARY; 266 267 napi_gro_receive(&priv->recv_napi, skb); 268 269 repost: 270 if (unlikely(ipoib_ib_post_receive(dev, wr_id))) 271 ipoib_warn(priv, "ipoib_ib_post_receive failed " 272 "for buf %d\n", wr_id); 273 } 274 275 int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req) 276 { 277 struct sk_buff *skb = tx_req->skb; 278 u64 *mapping = tx_req->mapping; 279 int i; 280 int off; 281 282 if (skb_headlen(skb)) { 283 mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb), 284 DMA_TO_DEVICE); 285 if (unlikely(ib_dma_mapping_error(ca, mapping[0]))) 286 return -EIO; 287 288 off = 1; 289 } else 290 off = 0; 291 292 for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { 293 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 294 mapping[i + off] = ib_dma_map_page(ca, 295 skb_frag_page(frag), 296 skb_frag_off(frag), 297 skb_frag_size(frag), 298 DMA_TO_DEVICE); 299 if (unlikely(ib_dma_mapping_error(ca, mapping[i + off]))) 300 goto partial_error; 301 } 302 return 0; 303 304 partial_error: 305 for (; i > 0; --i) { 306 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1]; 307 308 ib_dma_unmap_page(ca, mapping[i - !off], skb_frag_size(frag), DMA_TO_DEVICE); 309 } 310 311 if (off) 312 ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE); 313 314 return -EIO; 315 } 316 317 void ipoib_dma_unmap_tx(struct ipoib_dev_priv *priv, 318 struct ipoib_tx_buf *tx_req) 319 { 320 struct sk_buff *skb = tx_req->skb; 321 u64 *mapping = tx_req->mapping; 322 int i; 323 int off; 324 325 if (skb_headlen(skb)) { 326 ib_dma_unmap_single(priv->ca, mapping[0], skb_headlen(skb), 327 DMA_TO_DEVICE); 328 off = 1; 329 } else 330 off = 0; 331 332 for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) { 333 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 334 335 ib_dma_unmap_page(priv->ca, mapping[i + off], 336 skb_frag_size(frag), DMA_TO_DEVICE); 337 } 338 } 339 340 /* 341 * As the result of a completion error the QP Can be transferred to SQE states. 342 * The function checks if the (send)QP is in SQE state and 343 * moves it back to RTS state, that in order to have it functional again. 344 */ 345 static void ipoib_qp_state_validate_work(struct work_struct *work) 346 { 347 struct ipoib_qp_state_validate *qp_work = 348 container_of(work, struct ipoib_qp_state_validate, work); 349 350 struct ipoib_dev_priv *priv = qp_work->priv; 351 struct ib_qp_attr qp_attr; 352 struct ib_qp_init_attr query_init_attr; 353 int ret; 354 355 ret = ib_query_qp(priv->qp, &qp_attr, IB_QP_STATE, &query_init_attr); 356 if (ret) { 357 ipoib_warn(priv, "%s: Failed to query QP ret: %d\n", 358 __func__, ret); 359 goto free_res; 360 } 361 pr_info("%s: QP: 0x%x is in state: %d\n", 362 __func__, priv->qp->qp_num, qp_attr.qp_state); 363 364 /* currently support only in SQE->RTS transition*/ 365 if (qp_attr.qp_state == IB_QPS_SQE) { 366 qp_attr.qp_state = IB_QPS_RTS; 367 368 ret = ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE); 369 if (ret) { 370 pr_warn("failed(%d) modify QP:0x%x SQE->RTS\n", 371 ret, priv->qp->qp_num); 372 goto free_res; 373 } 374 pr_info("%s: QP: 0x%x moved from IB_QPS_SQE to IB_QPS_RTS\n", 375 __func__, priv->qp->qp_num); 376 } else { 377 pr_warn("QP (%d) will stay in state: %d\n", 378 priv->qp->qp_num, qp_attr.qp_state); 379 } 380 381 free_res: 382 kfree(qp_work); 383 } 384 385 static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc) 386 { 387 struct ipoib_dev_priv *priv = ipoib_priv(dev); 388 unsigned int wr_id = wc->wr_id; 389 struct ipoib_tx_buf *tx_req; 390 391 ipoib_dbg_data(priv, "send completion: id %d, status: %d\n", 392 wr_id, wc->status); 393 394 if (unlikely(wr_id >= ipoib_sendq_size)) { 395 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n", 396 wr_id, ipoib_sendq_size); 397 return; 398 } 399 400 tx_req = &priv->tx_ring[wr_id]; 401 402 ipoib_dma_unmap_tx(priv, tx_req); 403 404 ++dev->stats.tx_packets; 405 dev->stats.tx_bytes += tx_req->skb->len; 406 407 dev_kfree_skb_any(tx_req->skb); 408 409 ++priv->tx_tail; 410 ++priv->global_tx_tail; 411 412 if (unlikely(netif_queue_stopped(dev) && 413 ((priv->global_tx_head - priv->global_tx_tail) <= 414 ipoib_sendq_size >> 1) && 415 test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))) 416 netif_wake_queue(dev); 417 418 if (wc->status != IB_WC_SUCCESS && 419 wc->status != IB_WC_WR_FLUSH_ERR) { 420 struct ipoib_qp_state_validate *qp_work; 421 ipoib_warn(priv, 422 "failed send event (status=%d, wrid=%d vend_err %#x)\n", 423 wc->status, wr_id, wc->vendor_err); 424 qp_work = kzalloc(sizeof(*qp_work), GFP_ATOMIC); 425 if (!qp_work) 426 return; 427 428 INIT_WORK(&qp_work->work, ipoib_qp_state_validate_work); 429 qp_work->priv = priv; 430 queue_work(priv->wq, &qp_work->work); 431 } 432 } 433 434 static int poll_tx(struct ipoib_dev_priv *priv) 435 { 436 int n, i; 437 struct ib_wc *wc; 438 439 n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc); 440 for (i = 0; i < n; ++i) { 441 wc = priv->send_wc + i; 442 if (wc->wr_id & IPOIB_OP_CM) 443 ipoib_cm_handle_tx_wc(priv->dev, priv->send_wc + i); 444 else 445 ipoib_ib_handle_tx_wc(priv->dev, priv->send_wc + i); 446 } 447 return n == MAX_SEND_CQE; 448 } 449 450 int ipoib_rx_poll(struct napi_struct *napi, int budget) 451 { 452 struct ipoib_dev_priv *priv = 453 container_of(napi, struct ipoib_dev_priv, recv_napi); 454 struct net_device *dev = priv->dev; 455 int done; 456 int t; 457 int n, i; 458 459 done = 0; 460 461 poll_more: 462 while (done < budget) { 463 int max = (budget - done); 464 465 t = min(IPOIB_NUM_WC, max); 466 n = ib_poll_cq(priv->recv_cq, t, priv->ibwc); 467 468 for (i = 0; i < n; i++) { 469 struct ib_wc *wc = priv->ibwc + i; 470 471 if (wc->wr_id & IPOIB_OP_RECV) { 472 ++done; 473 if (wc->wr_id & IPOIB_OP_CM) 474 ipoib_cm_handle_rx_wc(dev, wc); 475 else 476 ipoib_ib_handle_rx_wc(dev, wc); 477 } else { 478 pr_warn("%s: Got unexpected wqe id\n", __func__); 479 } 480 } 481 482 if (n != t) 483 break; 484 } 485 486 if (done < budget) { 487 napi_complete(napi); 488 if (unlikely(ib_req_notify_cq(priv->recv_cq, 489 IB_CQ_NEXT_COMP | 490 IB_CQ_REPORT_MISSED_EVENTS)) && 491 napi_reschedule(napi)) 492 goto poll_more; 493 } 494 495 return done; 496 } 497 498 int ipoib_tx_poll(struct napi_struct *napi, int budget) 499 { 500 struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, 501 send_napi); 502 struct net_device *dev = priv->dev; 503 int n, i; 504 struct ib_wc *wc; 505 506 poll_more: 507 n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc); 508 509 for (i = 0; i < n; i++) { 510 wc = priv->send_wc + i; 511 if (wc->wr_id & IPOIB_OP_CM) 512 ipoib_cm_handle_tx_wc(dev, wc); 513 else 514 ipoib_ib_handle_tx_wc(dev, wc); 515 } 516 517 if (n < budget) { 518 napi_complete(napi); 519 if (unlikely(ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP | 520 IB_CQ_REPORT_MISSED_EVENTS)) && 521 napi_reschedule(napi)) 522 goto poll_more; 523 } 524 return n < 0 ? 0 : n; 525 } 526 527 void ipoib_ib_rx_completion(struct ib_cq *cq, void *ctx_ptr) 528 { 529 struct ipoib_dev_priv *priv = ctx_ptr; 530 531 napi_schedule(&priv->recv_napi); 532 } 533 534 void ipoib_ib_tx_completion(struct ib_cq *cq, void *ctx_ptr) 535 { 536 struct ipoib_dev_priv *priv = ctx_ptr; 537 538 napi_schedule(&priv->send_napi); 539 } 540 541 static inline int post_send(struct ipoib_dev_priv *priv, 542 unsigned int wr_id, 543 struct ib_ah *address, u32 dqpn, 544 struct ipoib_tx_buf *tx_req, 545 void *head, int hlen) 546 { 547 struct sk_buff *skb = tx_req->skb; 548 549 ipoib_build_sge(priv, tx_req); 550 551 priv->tx_wr.wr.wr_id = wr_id; 552 priv->tx_wr.remote_qpn = dqpn; 553 priv->tx_wr.ah = address; 554 555 if (head) { 556 priv->tx_wr.mss = skb_shinfo(skb)->gso_size; 557 priv->tx_wr.header = head; 558 priv->tx_wr.hlen = hlen; 559 priv->tx_wr.wr.opcode = IB_WR_LSO; 560 } else 561 priv->tx_wr.wr.opcode = IB_WR_SEND; 562 563 return ib_post_send(priv->qp, &priv->tx_wr.wr, NULL); 564 } 565 566 int ipoib_send(struct net_device *dev, struct sk_buff *skb, 567 struct ib_ah *address, u32 dqpn) 568 { 569 struct ipoib_dev_priv *priv = ipoib_priv(dev); 570 struct ipoib_tx_buf *tx_req; 571 int hlen, rc; 572 void *phead; 573 unsigned int usable_sge = priv->max_send_sge - !!skb_headlen(skb); 574 575 if (skb_is_gso(skb)) { 576 hlen = skb_transport_offset(skb) + tcp_hdrlen(skb); 577 phead = skb->data; 578 if (unlikely(!skb_pull(skb, hlen))) { 579 ipoib_warn(priv, "linear data too small\n"); 580 ++dev->stats.tx_dropped; 581 ++dev->stats.tx_errors; 582 dev_kfree_skb_any(skb); 583 return -1; 584 } 585 } else { 586 if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) { 587 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", 588 skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN); 589 ++dev->stats.tx_dropped; 590 ++dev->stats.tx_errors; 591 ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu); 592 return -1; 593 } 594 phead = NULL; 595 hlen = 0; 596 } 597 if (skb_shinfo(skb)->nr_frags > usable_sge) { 598 if (skb_linearize(skb) < 0) { 599 ipoib_warn(priv, "skb could not be linearized\n"); 600 ++dev->stats.tx_dropped; 601 ++dev->stats.tx_errors; 602 dev_kfree_skb_any(skb); 603 return -1; 604 } 605 /* Does skb_linearize return ok without reducing nr_frags? */ 606 if (skb_shinfo(skb)->nr_frags > usable_sge) { 607 ipoib_warn(priv, "too many frags after skb linearize\n"); 608 ++dev->stats.tx_dropped; 609 ++dev->stats.tx_errors; 610 dev_kfree_skb_any(skb); 611 return -1; 612 } 613 } 614 615 ipoib_dbg_data(priv, 616 "sending packet, length=%d address=%p dqpn=0x%06x\n", 617 skb->len, address, dqpn); 618 619 /* 620 * We put the skb into the tx_ring _before_ we call post_send() 621 * because it's entirely possible that the completion handler will 622 * run before we execute anything after the post_send(). That 623 * means we have to make sure everything is properly recorded and 624 * our state is consistent before we call post_send(). 625 */ 626 tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; 627 tx_req->skb = skb; 628 if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) { 629 ++dev->stats.tx_errors; 630 dev_kfree_skb_any(skb); 631 return -1; 632 } 633 634 if (skb->ip_summed == CHECKSUM_PARTIAL) 635 priv->tx_wr.wr.send_flags |= IB_SEND_IP_CSUM; 636 else 637 priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM; 638 /* increase the tx_head after send success, but use it for queue state */ 639 if ((priv->global_tx_head - priv->global_tx_tail) == 640 ipoib_sendq_size - 1) { 641 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); 642 netif_stop_queue(dev); 643 } 644 645 skb_orphan(skb); 646 skb_dst_drop(skb); 647 648 if (netif_queue_stopped(dev)) 649 if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP | 650 IB_CQ_REPORT_MISSED_EVENTS) < 0) 651 ipoib_warn(priv, "request notify on send CQ failed\n"); 652 653 rc = post_send(priv, priv->tx_head & (ipoib_sendq_size - 1), 654 address, dqpn, tx_req, phead, hlen); 655 if (unlikely(rc)) { 656 ipoib_warn(priv, "post_send failed, error %d\n", rc); 657 ++dev->stats.tx_errors; 658 ipoib_dma_unmap_tx(priv, tx_req); 659 dev_kfree_skb_any(skb); 660 if (netif_queue_stopped(dev)) 661 netif_wake_queue(dev); 662 rc = 0; 663 } else { 664 netif_trans_update(dev); 665 666 rc = priv->tx_head; 667 ++priv->tx_head; 668 ++priv->global_tx_head; 669 } 670 return rc; 671 } 672 673 static void __ipoib_reap_ah(struct net_device *dev) 674 { 675 struct ipoib_dev_priv *priv = ipoib_priv(dev); 676 struct ipoib_ah *ah, *tah; 677 unsigned long flags; 678 679 netif_tx_lock_bh(dev); 680 spin_lock_irqsave(&priv->lock, flags); 681 682 list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) 683 if ((int) priv->tx_tail - (int) ah->last_send >= 0) { 684 list_del(&ah->list); 685 rdma_destroy_ah(ah->ah, 0); 686 kfree(ah); 687 } 688 689 spin_unlock_irqrestore(&priv->lock, flags); 690 netif_tx_unlock_bh(dev); 691 } 692 693 void ipoib_reap_ah(struct work_struct *work) 694 { 695 struct ipoib_dev_priv *priv = 696 container_of(work, struct ipoib_dev_priv, ah_reap_task.work); 697 struct net_device *dev = priv->dev; 698 699 __ipoib_reap_ah(dev); 700 701 if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) 702 queue_delayed_work(priv->wq, &priv->ah_reap_task, 703 round_jiffies_relative(HZ)); 704 } 705 706 static void ipoib_flush_ah(struct net_device *dev) 707 { 708 struct ipoib_dev_priv *priv = ipoib_priv(dev); 709 710 cancel_delayed_work(&priv->ah_reap_task); 711 flush_workqueue(priv->wq); 712 ipoib_reap_ah(&priv->ah_reap_task.work); 713 } 714 715 static void ipoib_stop_ah(struct net_device *dev) 716 { 717 struct ipoib_dev_priv *priv = ipoib_priv(dev); 718 719 set_bit(IPOIB_STOP_REAPER, &priv->flags); 720 ipoib_flush_ah(dev); 721 } 722 723 static int recvs_pending(struct net_device *dev) 724 { 725 struct ipoib_dev_priv *priv = ipoib_priv(dev); 726 int pending = 0; 727 int i; 728 729 for (i = 0; i < ipoib_recvq_size; ++i) 730 if (priv->rx_ring[i].skb) 731 ++pending; 732 733 return pending; 734 } 735 736 static void check_qp_movement_and_print(struct ipoib_dev_priv *priv, 737 struct ib_qp *qp, 738 enum ib_qp_state new_state) 739 { 740 struct ib_qp_attr qp_attr; 741 struct ib_qp_init_attr query_init_attr; 742 int ret; 743 744 ret = ib_query_qp(qp, &qp_attr, IB_QP_STATE, &query_init_attr); 745 if (ret) { 746 ipoib_warn(priv, "%s: Failed to query QP\n", __func__); 747 return; 748 } 749 /* print according to the new-state and the previous state.*/ 750 if (new_state == IB_QPS_ERR && qp_attr.qp_state == IB_QPS_RESET) 751 ipoib_dbg(priv, "Failed modify QP, IB_QPS_RESET to IB_QPS_ERR, acceptable\n"); 752 else 753 ipoib_warn(priv, "Failed to modify QP to state: %d from state: %d\n", 754 new_state, qp_attr.qp_state); 755 } 756 757 static void ipoib_napi_enable(struct net_device *dev) 758 { 759 struct ipoib_dev_priv *priv = ipoib_priv(dev); 760 761 napi_enable(&priv->recv_napi); 762 napi_enable(&priv->send_napi); 763 } 764 765 static void ipoib_napi_disable(struct net_device *dev) 766 { 767 struct ipoib_dev_priv *priv = ipoib_priv(dev); 768 769 napi_disable(&priv->recv_napi); 770 napi_disable(&priv->send_napi); 771 } 772 773 int ipoib_ib_dev_stop_default(struct net_device *dev) 774 { 775 struct ipoib_dev_priv *priv = ipoib_priv(dev); 776 struct ib_qp_attr qp_attr; 777 unsigned long begin; 778 struct ipoib_tx_buf *tx_req; 779 int i; 780 781 if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) 782 ipoib_napi_disable(dev); 783 784 ipoib_cm_dev_stop(dev); 785 786 /* 787 * Move our QP to the error state and then reinitialize in 788 * when all work requests have completed or have been flushed. 789 */ 790 qp_attr.qp_state = IB_QPS_ERR; 791 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 792 check_qp_movement_and_print(priv, priv->qp, IB_QPS_ERR); 793 794 /* Wait for all sends and receives to complete */ 795 begin = jiffies; 796 797 while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { 798 if (time_after(jiffies, begin + 5 * HZ)) { 799 ipoib_warn(priv, 800 "timing out; %d sends %d receives not completed\n", 801 priv->tx_head - priv->tx_tail, 802 recvs_pending(dev)); 803 804 /* 805 * assume the HW is wedged and just free up 806 * all our pending work requests. 807 */ 808 while ((int)priv->tx_tail - (int)priv->tx_head < 0) { 809 tx_req = &priv->tx_ring[priv->tx_tail & 810 (ipoib_sendq_size - 1)]; 811 ipoib_dma_unmap_tx(priv, tx_req); 812 dev_kfree_skb_any(tx_req->skb); 813 ++priv->tx_tail; 814 ++priv->global_tx_tail; 815 } 816 817 for (i = 0; i < ipoib_recvq_size; ++i) { 818 struct ipoib_rx_buf *rx_req; 819 820 rx_req = &priv->rx_ring[i]; 821 if (!rx_req->skb) 822 continue; 823 ipoib_ud_dma_unmap_rx(priv, 824 priv->rx_ring[i].mapping); 825 dev_kfree_skb_any(rx_req->skb); 826 rx_req->skb = NULL; 827 } 828 829 goto timeout; 830 } 831 832 ipoib_drain_cq(dev); 833 834 usleep_range(1000, 2000); 835 } 836 837 ipoib_dbg(priv, "All sends and receives done.\n"); 838 839 timeout: 840 qp_attr.qp_state = IB_QPS_RESET; 841 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 842 ipoib_warn(priv, "Failed to modify QP to RESET state\n"); 843 844 ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP); 845 846 return 0; 847 } 848 849 int ipoib_ib_dev_stop(struct net_device *dev) 850 { 851 struct ipoib_dev_priv *priv = ipoib_priv(dev); 852 853 priv->rn_ops->ndo_stop(dev); 854 855 clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); 856 ipoib_flush_ah(dev); 857 858 return 0; 859 } 860 861 int ipoib_ib_dev_open_default(struct net_device *dev) 862 { 863 struct ipoib_dev_priv *priv = ipoib_priv(dev); 864 int ret; 865 866 ret = ipoib_init_qp(dev); 867 if (ret) { 868 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); 869 return -1; 870 } 871 872 ret = ipoib_ib_post_receives(dev); 873 if (ret) { 874 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); 875 goto out; 876 } 877 878 ret = ipoib_cm_dev_open(dev); 879 if (ret) { 880 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret); 881 goto out; 882 } 883 884 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) 885 ipoib_napi_enable(dev); 886 887 return 0; 888 out: 889 return -1; 890 } 891 892 int ipoib_ib_dev_open(struct net_device *dev) 893 { 894 struct ipoib_dev_priv *priv = ipoib_priv(dev); 895 896 ipoib_pkey_dev_check_presence(dev); 897 898 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 899 ipoib_warn(priv, "P_Key 0x%04x is %s\n", priv->pkey, 900 (!(priv->pkey & 0x7fff) ? "Invalid" : "not found")); 901 return -1; 902 } 903 904 clear_bit(IPOIB_STOP_REAPER, &priv->flags); 905 queue_delayed_work(priv->wq, &priv->ah_reap_task, 906 round_jiffies_relative(HZ)); 907 908 if (priv->rn_ops->ndo_open(dev)) { 909 pr_warn("%s: Failed to open dev\n", dev->name); 910 goto dev_stop; 911 } 912 913 set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); 914 915 return 0; 916 917 dev_stop: 918 set_bit(IPOIB_STOP_REAPER, &priv->flags); 919 cancel_delayed_work(&priv->ah_reap_task); 920 set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); 921 ipoib_ib_dev_stop(dev); 922 return -1; 923 } 924 925 void ipoib_pkey_dev_check_presence(struct net_device *dev) 926 { 927 struct ipoib_dev_priv *priv = ipoib_priv(dev); 928 struct rdma_netdev *rn = netdev_priv(dev); 929 930 if (!(priv->pkey & 0x7fff) || 931 ib_find_pkey(priv->ca, priv->port, priv->pkey, 932 &priv->pkey_index)) { 933 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 934 } else { 935 if (rn->set_id) 936 rn->set_id(dev, priv->pkey_index); 937 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 938 } 939 } 940 941 void ipoib_ib_dev_up(struct net_device *dev) 942 { 943 struct ipoib_dev_priv *priv = ipoib_priv(dev); 944 945 ipoib_pkey_dev_check_presence(dev); 946 947 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 948 ipoib_dbg(priv, "PKEY is not assigned.\n"); 949 return; 950 } 951 952 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 953 954 ipoib_mcast_start_thread(dev); 955 } 956 957 void ipoib_ib_dev_down(struct net_device *dev) 958 { 959 struct ipoib_dev_priv *priv = ipoib_priv(dev); 960 961 ipoib_dbg(priv, "downing ib_dev\n"); 962 963 clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 964 netif_carrier_off(dev); 965 966 ipoib_mcast_stop_thread(dev); 967 ipoib_mcast_dev_flush(dev); 968 969 ipoib_flush_paths(dev); 970 } 971 972 void ipoib_drain_cq(struct net_device *dev) 973 { 974 struct ipoib_dev_priv *priv = ipoib_priv(dev); 975 int i, n; 976 977 /* 978 * We call completion handling routines that expect to be 979 * called from the BH-disabled NAPI poll context, so disable 980 * BHs here too. 981 */ 982 local_bh_disable(); 983 984 do { 985 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); 986 for (i = 0; i < n; ++i) { 987 /* 988 * Convert any successful completions to flush 989 * errors to avoid passing packets up the 990 * stack after bringing the device down. 991 */ 992 if (priv->ibwc[i].status == IB_WC_SUCCESS) 993 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; 994 995 if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) { 996 if (priv->ibwc[i].wr_id & IPOIB_OP_CM) 997 ipoib_cm_handle_rx_wc(dev, priv->ibwc + i); 998 else 999 ipoib_ib_handle_rx_wc(dev, priv->ibwc + i); 1000 } else { 1001 pr_warn("%s: Got unexpected wqe id\n", __func__); 1002 } 1003 } 1004 } while (n == IPOIB_NUM_WC); 1005 1006 while (poll_tx(priv)) 1007 ; /* nothing */ 1008 1009 local_bh_enable(); 1010 } 1011 1012 /* 1013 * Takes whatever value which is in pkey index 0 and updates priv->pkey 1014 * returns 0 if the pkey value was changed. 1015 */ 1016 static inline int update_parent_pkey(struct ipoib_dev_priv *priv) 1017 { 1018 int result; 1019 u16 prev_pkey; 1020 1021 prev_pkey = priv->pkey; 1022 result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey); 1023 if (result) { 1024 ipoib_warn(priv, "ib_query_pkey port %d failed (ret = %d)\n", 1025 priv->port, result); 1026 return result; 1027 } 1028 1029 priv->pkey |= 0x8000; 1030 1031 if (prev_pkey != priv->pkey) { 1032 ipoib_dbg(priv, "pkey changed from 0x%x to 0x%x\n", 1033 prev_pkey, priv->pkey); 1034 /* 1035 * Update the pkey in the broadcast address, while making sure to set 1036 * the full membership bit, so that we join the right broadcast group. 1037 */ 1038 priv->dev->broadcast[8] = priv->pkey >> 8; 1039 priv->dev->broadcast[9] = priv->pkey & 0xff; 1040 return 0; 1041 } 1042 1043 return 1; 1044 } 1045 /* 1046 * returns 0 if pkey value was found in a different slot. 1047 */ 1048 static inline int update_child_pkey(struct ipoib_dev_priv *priv) 1049 { 1050 u16 old_index = priv->pkey_index; 1051 1052 priv->pkey_index = 0; 1053 ipoib_pkey_dev_check_presence(priv->dev); 1054 1055 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && 1056 (old_index == priv->pkey_index)) 1057 return 1; 1058 return 0; 1059 } 1060 1061 /* 1062 * returns true if the device address of the ipoib interface has changed and the 1063 * new address is a valid one (i.e in the gid table), return false otherwise. 1064 */ 1065 static bool ipoib_dev_addr_changed_valid(struct ipoib_dev_priv *priv) 1066 { 1067 union ib_gid search_gid; 1068 union ib_gid gid0; 1069 union ib_gid *netdev_gid; 1070 int err; 1071 u16 index; 1072 u8 port; 1073 bool ret = false; 1074 1075 netdev_gid = (union ib_gid *)(priv->dev->dev_addr + 4); 1076 if (rdma_query_gid(priv->ca, priv->port, 0, &gid0)) 1077 return false; 1078 1079 netif_addr_lock_bh(priv->dev); 1080 1081 /* The subnet prefix may have changed, update it now so we won't have 1082 * to do it later 1083 */ 1084 priv->local_gid.global.subnet_prefix = gid0.global.subnet_prefix; 1085 netdev_gid->global.subnet_prefix = gid0.global.subnet_prefix; 1086 search_gid.global.subnet_prefix = gid0.global.subnet_prefix; 1087 1088 search_gid.global.interface_id = priv->local_gid.global.interface_id; 1089 1090 netif_addr_unlock_bh(priv->dev); 1091 1092 err = ib_find_gid(priv->ca, &search_gid, &port, &index); 1093 1094 netif_addr_lock_bh(priv->dev); 1095 1096 if (search_gid.global.interface_id != 1097 priv->local_gid.global.interface_id) 1098 /* There was a change while we were looking up the gid, bail 1099 * here and let the next work sort this out 1100 */ 1101 goto out; 1102 1103 /* The next section of code needs some background: 1104 * Per IB spec the port GUID can't change if the HCA is powered on. 1105 * port GUID is the basis for GID at index 0 which is the basis for 1106 * the default device address of a ipoib interface. 1107 * 1108 * so it seems the flow should be: 1109 * if user_changed_dev_addr && gid in gid tbl 1110 * set bit dev_addr_set 1111 * return true 1112 * else 1113 * return false 1114 * 1115 * The issue is that there are devices that don't follow the spec, 1116 * they change the port GUID when the HCA is powered, so in order 1117 * not to break userspace applications, We need to check if the 1118 * user wanted to control the device address and we assume that 1119 * if he sets the device address back to be based on GID index 0, 1120 * he no longer wishs to control it. 1121 * 1122 * If the user doesn't control the the device address, 1123 * IPOIB_FLAG_DEV_ADDR_SET is set and ib_find_gid failed it means 1124 * the port GUID has changed and GID at index 0 has changed 1125 * so we need to change priv->local_gid and priv->dev->dev_addr 1126 * to reflect the new GID. 1127 */ 1128 if (!test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) { 1129 if (!err && port == priv->port) { 1130 set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags); 1131 if (index == 0) 1132 clear_bit(IPOIB_FLAG_DEV_ADDR_CTRL, 1133 &priv->flags); 1134 else 1135 set_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags); 1136 ret = true; 1137 } else { 1138 ret = false; 1139 } 1140 } else { 1141 if (!err && port == priv->port) { 1142 ret = true; 1143 } else { 1144 if (!test_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags)) { 1145 memcpy(&priv->local_gid, &gid0, 1146 sizeof(priv->local_gid)); 1147 memcpy(priv->dev->dev_addr + 4, &gid0, 1148 sizeof(priv->local_gid)); 1149 ret = true; 1150 } 1151 } 1152 } 1153 1154 out: 1155 netif_addr_unlock_bh(priv->dev); 1156 1157 return ret; 1158 } 1159 1160 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, 1161 enum ipoib_flush_level level, 1162 int nesting) 1163 { 1164 struct ipoib_dev_priv *cpriv; 1165 struct net_device *dev = priv->dev; 1166 int result; 1167 1168 down_read_nested(&priv->vlan_rwsem, nesting); 1169 1170 /* 1171 * Flush any child interfaces too -- they might be up even if 1172 * the parent is down. 1173 */ 1174 list_for_each_entry(cpriv, &priv->child_intfs, list) 1175 __ipoib_ib_dev_flush(cpriv, level, nesting + 1); 1176 1177 up_read(&priv->vlan_rwsem); 1178 1179 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) && 1180 level != IPOIB_FLUSH_HEAVY) { 1181 /* Make sure the dev_addr is set even if not flushing */ 1182 if (level == IPOIB_FLUSH_LIGHT) 1183 ipoib_dev_addr_changed_valid(priv); 1184 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); 1185 return; 1186 } 1187 1188 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 1189 /* interface is down. update pkey and leave. */ 1190 if (level == IPOIB_FLUSH_HEAVY) { 1191 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) 1192 update_parent_pkey(priv); 1193 else 1194 update_child_pkey(priv); 1195 } else if (level == IPOIB_FLUSH_LIGHT) 1196 ipoib_dev_addr_changed_valid(priv); 1197 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); 1198 return; 1199 } 1200 1201 if (level == IPOIB_FLUSH_HEAVY) { 1202 /* child devices chase their origin pkey value, while non-child 1203 * (parent) devices should always takes what present in pkey index 0 1204 */ 1205 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 1206 result = update_child_pkey(priv); 1207 if (result) { 1208 /* restart QP only if P_Key index is changed */ 1209 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); 1210 return; 1211 } 1212 1213 } else { 1214 result = update_parent_pkey(priv); 1215 /* restart QP only if P_Key value changed */ 1216 if (result) { 1217 ipoib_dbg(priv, "Not flushing - P_Key value not changed.\n"); 1218 return; 1219 } 1220 } 1221 } 1222 1223 if (level == IPOIB_FLUSH_LIGHT) { 1224 int oper_up; 1225 ipoib_mark_paths_invalid(dev); 1226 /* Set IPoIB operation as down to prevent races between: 1227 * the flush flow which leaves MCG and on the fly joins 1228 * which can happen during that time. mcast restart task 1229 * should deal with join requests we missed. 1230 */ 1231 oper_up = test_and_clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 1232 ipoib_mcast_dev_flush(dev); 1233 if (oper_up) 1234 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 1235 ipoib_flush_ah(dev); 1236 } 1237 1238 if (level >= IPOIB_FLUSH_NORMAL) 1239 ipoib_ib_dev_down(dev); 1240 1241 if (level == IPOIB_FLUSH_HEAVY) { 1242 if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) 1243 ipoib_ib_dev_stop(dev); 1244 1245 if (ipoib_ib_dev_open(dev)) 1246 return; 1247 1248 if (netif_queue_stopped(dev)) 1249 netif_start_queue(dev); 1250 } 1251 1252 /* 1253 * The device could have been brought down between the start and when 1254 * we get here, don't bring it back up if it's not configured up 1255 */ 1256 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 1257 if (level >= IPOIB_FLUSH_NORMAL) 1258 ipoib_ib_dev_up(dev); 1259 if (ipoib_dev_addr_changed_valid(priv)) 1260 ipoib_mcast_restart_task(&priv->restart_task); 1261 } 1262 } 1263 1264 void ipoib_ib_dev_flush_light(struct work_struct *work) 1265 { 1266 struct ipoib_dev_priv *priv = 1267 container_of(work, struct ipoib_dev_priv, flush_light); 1268 1269 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT, 0); 1270 } 1271 1272 void ipoib_ib_dev_flush_normal(struct work_struct *work) 1273 { 1274 struct ipoib_dev_priv *priv = 1275 container_of(work, struct ipoib_dev_priv, flush_normal); 1276 1277 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL, 0); 1278 } 1279 1280 void ipoib_ib_dev_flush_heavy(struct work_struct *work) 1281 { 1282 struct ipoib_dev_priv *priv = 1283 container_of(work, struct ipoib_dev_priv, flush_heavy); 1284 1285 rtnl_lock(); 1286 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY, 0); 1287 rtnl_unlock(); 1288 } 1289 1290 void ipoib_ib_dev_cleanup(struct net_device *dev) 1291 { 1292 struct ipoib_dev_priv *priv = ipoib_priv(dev); 1293 1294 ipoib_dbg(priv, "cleaning up ib_dev\n"); 1295 /* 1296 * We must make sure there are no more (path) completions 1297 * that may wish to touch priv fields that are no longer valid 1298 */ 1299 ipoib_flush_paths(dev); 1300 1301 ipoib_mcast_stop_thread(dev); 1302 ipoib_mcast_dev_flush(dev); 1303 1304 /* 1305 * All of our ah references aren't free until after 1306 * ipoib_mcast_dev_flush(), ipoib_flush_paths, and 1307 * the neighbor garbage collection is stopped and reaped. 1308 * That should all be done now, so make a final ah flush. 1309 */ 1310 ipoib_stop_ah(dev); 1311 1312 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 1313 1314 priv->rn_ops->ndo_uninit(dev); 1315 1316 if (priv->pd) { 1317 ib_dealloc_pd(priv->pd); 1318 priv->pd = NULL; 1319 } 1320 } 1321 1322