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 48static int data_debug_level; 49 50module_param(data_debug_level, int, 0644); 51MODULE_PARM_DESC(data_debug_level, 52 "Enable data path debug tracing if > 0"); 53#endif 54 55struct 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 81void 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 93static 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 101static 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 122static 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; 149error: 150 dev_kfree_skb_any(skb); 151 return NULL; 152} 153 154static 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 173static 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 269repost: 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 275int 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 304partial_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 317void 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 */ 345static 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 381free_res: 382 kfree(qp_work); 383} 384 385static 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 434static 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 450int 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 461poll_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_schedule(napi)) 492 goto poll_more; 493 } 494 495 return done; 496} 497 498int 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 506poll_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_schedule(napi)) 522 goto poll_more; 523 } 524 return n < 0 ? 0 : n; 525} 526 527void 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/* The function will force napi_schedule */ 535void ipoib_napi_schedule_work(struct work_struct *work) 536{ 537 struct ipoib_dev_priv *priv = 538 container_of(work, struct ipoib_dev_priv, reschedule_napi_work); 539 bool ret; 540 541 do { 542 ret = napi_schedule(&priv->send_napi); 543 if (!ret) 544 msleep(3); 545 } while (!ret && netif_queue_stopped(priv->dev) && 546 test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)); 547} 548 549void ipoib_ib_tx_completion(struct ib_cq *cq, void *ctx_ptr) 550{ 551 struct ipoib_dev_priv *priv = ctx_ptr; 552 bool ret; 553 554 ret = napi_schedule(&priv->send_napi); 555 /* 556 * if the queue is closed the driver must be able to schedule napi, 557 * otherwise we can end with closed queue forever, because no new 558 * packets to send and napi callback might not get new event after 559 * its re-arm of the napi. 560 */ 561 if (!ret && netif_queue_stopped(priv->dev)) 562 schedule_work(&priv->reschedule_napi_work); 563} 564 565static inline int post_send(struct ipoib_dev_priv *priv, 566 unsigned int wr_id, 567 struct ib_ah *address, u32 dqpn, 568 struct ipoib_tx_buf *tx_req, 569 void *head, int hlen) 570{ 571 struct sk_buff *skb = tx_req->skb; 572 573 ipoib_build_sge(priv, tx_req); 574 575 priv->tx_wr.wr.wr_id = wr_id; 576 priv->tx_wr.remote_qpn = dqpn; 577 priv->tx_wr.ah = address; 578 579 if (head) { 580 priv->tx_wr.mss = skb_shinfo(skb)->gso_size; 581 priv->tx_wr.header = head; 582 priv->tx_wr.hlen = hlen; 583 priv->tx_wr.wr.opcode = IB_WR_LSO; 584 } else 585 priv->tx_wr.wr.opcode = IB_WR_SEND; 586 587 return ib_post_send(priv->qp, &priv->tx_wr.wr, NULL); 588} 589 590int ipoib_send(struct net_device *dev, struct sk_buff *skb, 591 struct ib_ah *address, u32 dqpn) 592{ 593 struct ipoib_dev_priv *priv = ipoib_priv(dev); 594 struct ipoib_tx_buf *tx_req; 595 int hlen, rc; 596 void *phead; 597 unsigned int usable_sge = priv->max_send_sge - !!skb_headlen(skb); 598 599 if (skb_is_gso(skb)) { 600 hlen = skb_tcp_all_headers(skb); 601 phead = skb->data; 602 if (unlikely(!skb_pull(skb, hlen))) { 603 ipoib_warn(priv, "linear data too small\n"); 604 ++dev->stats.tx_dropped; 605 ++dev->stats.tx_errors; 606 dev_kfree_skb_any(skb); 607 return -1; 608 } 609 } else { 610 if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) { 611 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", 612 skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN); 613 ++dev->stats.tx_dropped; 614 ++dev->stats.tx_errors; 615 ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu); 616 return -1; 617 } 618 phead = NULL; 619 hlen = 0; 620 } 621 if (skb_shinfo(skb)->nr_frags > usable_sge) { 622 if (skb_linearize(skb) < 0) { 623 ipoib_warn(priv, "skb could not be linearized\n"); 624 ++dev->stats.tx_dropped; 625 ++dev->stats.tx_errors; 626 dev_kfree_skb_any(skb); 627 return -1; 628 } 629 /* Does skb_linearize return ok without reducing nr_frags? */ 630 if (skb_shinfo(skb)->nr_frags > usable_sge) { 631 ipoib_warn(priv, "too many frags after skb linearize\n"); 632 ++dev->stats.tx_dropped; 633 ++dev->stats.tx_errors; 634 dev_kfree_skb_any(skb); 635 return -1; 636 } 637 } 638 639 ipoib_dbg_data(priv, 640 "sending packet, length=%d address=%p dqpn=0x%06x\n", 641 skb->len, address, dqpn); 642 643 /* 644 * We put the skb into the tx_ring _before_ we call post_send() 645 * because it's entirely possible that the completion handler will 646 * run before we execute anything after the post_send(). That 647 * means we have to make sure everything is properly recorded and 648 * our state is consistent before we call post_send(). 649 */ 650 tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)]; 651 tx_req->skb = skb; 652 if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) { 653 ++dev->stats.tx_errors; 654 dev_kfree_skb_any(skb); 655 return -1; 656 } 657 658 if (skb->ip_summed == CHECKSUM_PARTIAL) 659 priv->tx_wr.wr.send_flags |= IB_SEND_IP_CSUM; 660 else 661 priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM; 662 /* increase the tx_head after send success, but use it for queue state */ 663 if ((priv->global_tx_head - priv->global_tx_tail) == 664 ipoib_sendq_size - 1) { 665 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); 666 netif_stop_queue(dev); 667 } 668 669 skb_orphan(skb); 670 skb_dst_drop(skb); 671 672 if (netif_queue_stopped(dev)) 673 if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP | 674 IB_CQ_REPORT_MISSED_EVENTS) < 0) 675 ipoib_warn(priv, "request notify on send CQ failed\n"); 676 677 rc = post_send(priv, priv->tx_head & (ipoib_sendq_size - 1), 678 address, dqpn, tx_req, phead, hlen); 679 if (unlikely(rc)) { 680 ipoib_warn(priv, "post_send failed, error %d\n", rc); 681 ++dev->stats.tx_errors; 682 ipoib_dma_unmap_tx(priv, tx_req); 683 dev_kfree_skb_any(skb); 684 if (netif_queue_stopped(dev)) 685 netif_wake_queue(dev); 686 rc = 0; 687 } else { 688 netif_trans_update(dev); 689 690 rc = priv->tx_head; 691 ++priv->tx_head; 692 ++priv->global_tx_head; 693 } 694 return rc; 695} 696 697static void ipoib_reap_dead_ahs(struct ipoib_dev_priv *priv) 698{ 699 struct ipoib_ah *ah, *tah; 700 unsigned long flags; 701 702 netif_tx_lock_bh(priv->dev); 703 spin_lock_irqsave(&priv->lock, flags); 704 705 list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) 706 if ((int) priv->tx_tail - (int) ah->last_send >= 0) { 707 list_del(&ah->list); 708 rdma_destroy_ah(ah->ah, 0); 709 kfree(ah); 710 } 711 712 spin_unlock_irqrestore(&priv->lock, flags); 713 netif_tx_unlock_bh(priv->dev); 714} 715 716void ipoib_reap_ah(struct work_struct *work) 717{ 718 struct ipoib_dev_priv *priv = 719 container_of(work, struct ipoib_dev_priv, ah_reap_task.work); 720 721 ipoib_reap_dead_ahs(priv); 722 723 if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) 724 queue_delayed_work(priv->wq, &priv->ah_reap_task, 725 round_jiffies_relative(HZ)); 726} 727 728static void ipoib_start_ah_reaper(struct ipoib_dev_priv *priv) 729{ 730 clear_bit(IPOIB_STOP_REAPER, &priv->flags); 731 queue_delayed_work(priv->wq, &priv->ah_reap_task, 732 round_jiffies_relative(HZ)); 733} 734 735static void ipoib_stop_ah_reaper(struct ipoib_dev_priv *priv) 736{ 737 set_bit(IPOIB_STOP_REAPER, &priv->flags); 738 cancel_delayed_work(&priv->ah_reap_task); 739 /* 740 * After ipoib_stop_ah_reaper() we always go through 741 * ipoib_reap_dead_ahs() which ensures the work is really stopped and 742 * does a final flush out of the dead_ah's list 743 */ 744} 745 746static int recvs_pending(struct net_device *dev) 747{ 748 struct ipoib_dev_priv *priv = ipoib_priv(dev); 749 int pending = 0; 750 int i; 751 752 for (i = 0; i < ipoib_recvq_size; ++i) 753 if (priv->rx_ring[i].skb) 754 ++pending; 755 756 return pending; 757} 758 759static void check_qp_movement_and_print(struct ipoib_dev_priv *priv, 760 struct ib_qp *qp, 761 enum ib_qp_state new_state) 762{ 763 struct ib_qp_attr qp_attr; 764 struct ib_qp_init_attr query_init_attr; 765 int ret; 766 767 ret = ib_query_qp(qp, &qp_attr, IB_QP_STATE, &query_init_attr); 768 if (ret) { 769 ipoib_warn(priv, "%s: Failed to query QP\n", __func__); 770 return; 771 } 772 /* print according to the new-state and the previous state.*/ 773 if (new_state == IB_QPS_ERR && qp_attr.qp_state == IB_QPS_RESET) 774 ipoib_dbg(priv, "Failed modify QP, IB_QPS_RESET to IB_QPS_ERR, acceptable\n"); 775 else 776 ipoib_warn(priv, "Failed to modify QP to state: %d from state: %d\n", 777 new_state, qp_attr.qp_state); 778} 779 780static void ipoib_napi_enable(struct net_device *dev) 781{ 782 struct ipoib_dev_priv *priv = ipoib_priv(dev); 783 784 napi_enable(&priv->recv_napi); 785 napi_enable(&priv->send_napi); 786} 787 788static void ipoib_napi_disable(struct net_device *dev) 789{ 790 struct ipoib_dev_priv *priv = ipoib_priv(dev); 791 792 napi_disable(&priv->recv_napi); 793 napi_disable(&priv->send_napi); 794} 795 796int ipoib_ib_dev_stop_default(struct net_device *dev) 797{ 798 struct ipoib_dev_priv *priv = ipoib_priv(dev); 799 struct ib_qp_attr qp_attr; 800 unsigned long begin; 801 struct ipoib_tx_buf *tx_req; 802 int i; 803 804 if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) 805 ipoib_napi_disable(dev); 806 807 ipoib_cm_dev_stop(dev); 808 809 /* 810 * Move our QP to the error state and then reinitialize in 811 * when all work requests have completed or have been flushed. 812 */ 813 qp_attr.qp_state = IB_QPS_ERR; 814 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 815 check_qp_movement_and_print(priv, priv->qp, IB_QPS_ERR); 816 817 /* Wait for all sends and receives to complete */ 818 begin = jiffies; 819 820 while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { 821 if (time_after(jiffies, begin + 5 * HZ)) { 822 ipoib_warn(priv, 823 "timing out; %d sends %d receives not completed\n", 824 priv->tx_head - priv->tx_tail, 825 recvs_pending(dev)); 826 827 /* 828 * assume the HW is wedged and just free up 829 * all our pending work requests. 830 */ 831 while ((int)priv->tx_tail - (int)priv->tx_head < 0) { 832 tx_req = &priv->tx_ring[priv->tx_tail & 833 (ipoib_sendq_size - 1)]; 834 ipoib_dma_unmap_tx(priv, tx_req); 835 dev_kfree_skb_any(tx_req->skb); 836 ++priv->tx_tail; 837 ++priv->global_tx_tail; 838 } 839 840 for (i = 0; i < ipoib_recvq_size; ++i) { 841 struct ipoib_rx_buf *rx_req; 842 843 rx_req = &priv->rx_ring[i]; 844 if (!rx_req->skb) 845 continue; 846 ipoib_ud_dma_unmap_rx(priv, 847 priv->rx_ring[i].mapping); 848 dev_kfree_skb_any(rx_req->skb); 849 rx_req->skb = NULL; 850 } 851 852 goto timeout; 853 } 854 855 ipoib_drain_cq(dev); 856 857 usleep_range(1000, 2000); 858 } 859 860 ipoib_dbg(priv, "All sends and receives done.\n"); 861 862timeout: 863 qp_attr.qp_state = IB_QPS_RESET; 864 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 865 ipoib_warn(priv, "Failed to modify QP to RESET state\n"); 866 867 ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP); 868 869 return 0; 870} 871 872int ipoib_ib_dev_open_default(struct net_device *dev) 873{ 874 struct ipoib_dev_priv *priv = ipoib_priv(dev); 875 int ret; 876 877 ret = ipoib_init_qp(dev); 878 if (ret) { 879 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); 880 return -1; 881 } 882 883 ret = ipoib_ib_post_receives(dev); 884 if (ret) { 885 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); 886 goto out; 887 } 888 889 ret = ipoib_cm_dev_open(dev); 890 if (ret) { 891 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret); 892 goto out; 893 } 894 895 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) 896 ipoib_napi_enable(dev); 897 898 return 0; 899out: 900 return -1; 901} 902 903int ipoib_ib_dev_open(struct net_device *dev) 904{ 905 struct ipoib_dev_priv *priv = ipoib_priv(dev); 906 907 ipoib_pkey_dev_check_presence(dev); 908 909 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 910 ipoib_warn(priv, "P_Key 0x%04x is %s\n", priv->pkey, 911 (!(priv->pkey & 0x7fff) ? "Invalid" : "not found")); 912 return -1; 913 } 914 915 ipoib_start_ah_reaper(priv); 916 if (priv->rn_ops->ndo_open(dev)) { 917 pr_warn("%s: Failed to open dev\n", dev->name); 918 goto dev_stop; 919 } 920 921 set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); 922 923 return 0; 924 925dev_stop: 926 ipoib_stop_ah_reaper(priv); 927 return -1; 928} 929 930void ipoib_ib_dev_stop(struct net_device *dev) 931{ 932 struct ipoib_dev_priv *priv = ipoib_priv(dev); 933 934 priv->rn_ops->ndo_stop(dev); 935 936 clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags); 937 ipoib_stop_ah_reaper(priv); 938} 939 940void ipoib_pkey_dev_check_presence(struct net_device *dev) 941{ 942 struct ipoib_dev_priv *priv = ipoib_priv(dev); 943 struct rdma_netdev *rn = netdev_priv(dev); 944 945 if (!(priv->pkey & 0x7fff) || 946 ib_find_pkey(priv->ca, priv->port, priv->pkey, 947 &priv->pkey_index)) { 948 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 949 } else { 950 if (rn->set_id) 951 rn->set_id(dev, priv->pkey_index); 952 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 953 } 954} 955 956void ipoib_ib_dev_up(struct net_device *dev) 957{ 958 struct ipoib_dev_priv *priv = ipoib_priv(dev); 959 960 ipoib_pkey_dev_check_presence(dev); 961 962 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 963 ipoib_dbg(priv, "PKEY is not assigned.\n"); 964 return; 965 } 966 967 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 968 969 ipoib_mcast_start_thread(dev); 970} 971 972void ipoib_ib_dev_down(struct net_device *dev) 973{ 974 struct ipoib_dev_priv *priv = ipoib_priv(dev); 975 976 ipoib_dbg(priv, "downing ib_dev\n"); 977 978 clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 979 netif_carrier_off(dev); 980 981 ipoib_mcast_stop_thread(dev); 982 ipoib_mcast_dev_flush(dev); 983 984 ipoib_flush_paths(dev); 985} 986 987void ipoib_drain_cq(struct net_device *dev) 988{ 989 struct ipoib_dev_priv *priv = ipoib_priv(dev); 990 int i, n; 991 992 /* 993 * We call completion handling routines that expect to be 994 * called from the BH-disabled NAPI poll context, so disable 995 * BHs here too. 996 */ 997 local_bh_disable(); 998 999 do { 1000 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc); 1001 for (i = 0; i < n; ++i) { 1002 /* 1003 * Convert any successful completions to flush 1004 * errors to avoid passing packets up the 1005 * stack after bringing the device down. 1006 */ 1007 if (priv->ibwc[i].status == IB_WC_SUCCESS) 1008 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR; 1009 1010 if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) { 1011 if (priv->ibwc[i].wr_id & IPOIB_OP_CM) 1012 ipoib_cm_handle_rx_wc(dev, priv->ibwc + i); 1013 else 1014 ipoib_ib_handle_rx_wc(dev, priv->ibwc + i); 1015 } else { 1016 pr_warn("%s: Got unexpected wqe id\n", __func__); 1017 } 1018 } 1019 } while (n == IPOIB_NUM_WC); 1020 1021 while (poll_tx(priv)) 1022 ; /* nothing */ 1023 1024 local_bh_enable(); 1025} 1026 1027/* 1028 * Takes whatever value which is in pkey index 0 and updates priv->pkey 1029 * returns 0 if the pkey value was changed. 1030 */ 1031static inline int update_parent_pkey(struct ipoib_dev_priv *priv) 1032{ 1033 int result; 1034 u16 prev_pkey; 1035 1036 prev_pkey = priv->pkey; 1037 result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey); 1038 if (result) { 1039 ipoib_warn(priv, "ib_query_pkey port %d failed (ret = %d)\n", 1040 priv->port, result); 1041 return result; 1042 } 1043 1044 priv->pkey |= 0x8000; 1045 1046 if (prev_pkey != priv->pkey) { 1047 ipoib_dbg(priv, "pkey changed from 0x%x to 0x%x\n", 1048 prev_pkey, priv->pkey); 1049 /* 1050 * Update the pkey in the broadcast address, while making sure to set 1051 * the full membership bit, so that we join the right broadcast group. 1052 */ 1053 priv->dev->broadcast[8] = priv->pkey >> 8; 1054 priv->dev->broadcast[9] = priv->pkey & 0xff; 1055 return 0; 1056 } 1057 1058 return 1; 1059} 1060/* 1061 * returns 0 if pkey value was found in a different slot. 1062 */ 1063static inline int update_child_pkey(struct ipoib_dev_priv *priv) 1064{ 1065 u16 old_index = priv->pkey_index; 1066 1067 priv->pkey_index = 0; 1068 ipoib_pkey_dev_check_presence(priv->dev); 1069 1070 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) && 1071 (old_index == priv->pkey_index)) 1072 return 1; 1073 return 0; 1074} 1075 1076/* 1077 * returns true if the device address of the ipoib interface has changed and the 1078 * new address is a valid one (i.e in the gid table), return false otherwise. 1079 */ 1080static bool ipoib_dev_addr_changed_valid(struct ipoib_dev_priv *priv) 1081{ 1082 union ib_gid search_gid; 1083 union ib_gid gid0; 1084 int err; 1085 u16 index; 1086 u32 port; 1087 bool ret = false; 1088 1089 if (rdma_query_gid(priv->ca, priv->port, 0, &gid0)) 1090 return false; 1091 1092 netif_addr_lock_bh(priv->dev); 1093 1094 /* The subnet prefix may have changed, update it now so we won't have 1095 * to do it later 1096 */ 1097 priv->local_gid.global.subnet_prefix = gid0.global.subnet_prefix; 1098 dev_addr_mod(priv->dev, 4, (u8 *)&gid0.global.subnet_prefix, 1099 sizeof(gid0.global.subnet_prefix)); 1100 search_gid.global.subnet_prefix = gid0.global.subnet_prefix; 1101 1102 search_gid.global.interface_id = priv->local_gid.global.interface_id; 1103 1104 netif_addr_unlock_bh(priv->dev); 1105 1106 err = ib_find_gid(priv->ca, &search_gid, &port, &index); 1107 1108 netif_addr_lock_bh(priv->dev); 1109 1110 if (search_gid.global.interface_id != 1111 priv->local_gid.global.interface_id) 1112 /* There was a change while we were looking up the gid, bail 1113 * here and let the next work sort this out 1114 */ 1115 goto out; 1116 1117 /* The next section of code needs some background: 1118 * Per IB spec the port GUID can't change if the HCA is powered on. 1119 * port GUID is the basis for GID at index 0 which is the basis for 1120 * the default device address of a ipoib interface. 1121 * 1122 * so it seems the flow should be: 1123 * if user_changed_dev_addr && gid in gid tbl 1124 * set bit dev_addr_set 1125 * return true 1126 * else 1127 * return false 1128 * 1129 * The issue is that there are devices that don't follow the spec, 1130 * they change the port GUID when the HCA is powered, so in order 1131 * not to break userspace applications, We need to check if the 1132 * user wanted to control the device address and we assume that 1133 * if he sets the device address back to be based on GID index 0, 1134 * he no longer wishs to control it. 1135 * 1136 * If the user doesn't control the device address, 1137 * IPOIB_FLAG_DEV_ADDR_SET is set and ib_find_gid failed it means 1138 * the port GUID has changed and GID at index 0 has changed 1139 * so we need to change priv->local_gid and priv->dev->dev_addr 1140 * to reflect the new GID. 1141 */ 1142 if (!test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) { 1143 if (!err && port == priv->port) { 1144 set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags); 1145 if (index == 0) 1146 clear_bit(IPOIB_FLAG_DEV_ADDR_CTRL, 1147 &priv->flags); 1148 else 1149 set_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags); 1150 ret = true; 1151 } else { 1152 ret = false; 1153 } 1154 } else { 1155 if (!err && port == priv->port) { 1156 ret = true; 1157 } else { 1158 if (!test_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags)) { 1159 memcpy(&priv->local_gid, &gid0, 1160 sizeof(priv->local_gid)); 1161 dev_addr_mod(priv->dev, 4, (u8 *)&gid0, 1162 sizeof(priv->local_gid)); 1163 ret = true; 1164 } 1165 } 1166 } 1167 1168out: 1169 netif_addr_unlock_bh(priv->dev); 1170 1171 return ret; 1172} 1173 1174static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, 1175 enum ipoib_flush_level level, 1176 int nesting) 1177{ 1178 struct ipoib_dev_priv *cpriv; 1179 struct net_device *dev = priv->dev; 1180 int result; 1181 1182 down_read_nested(&priv->vlan_rwsem, nesting); 1183 1184 /* 1185 * Flush any child interfaces too -- they might be up even if 1186 * the parent is down. 1187 */ 1188 list_for_each_entry(cpriv, &priv->child_intfs, list) 1189 __ipoib_ib_dev_flush(cpriv, level, nesting + 1); 1190 1191 up_read(&priv->vlan_rwsem); 1192 1193 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) && 1194 level != IPOIB_FLUSH_HEAVY) { 1195 /* Make sure the dev_addr is set even if not flushing */ 1196 if (level == IPOIB_FLUSH_LIGHT) 1197 ipoib_dev_addr_changed_valid(priv); 1198 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n"); 1199 return; 1200 } 1201 1202 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 1203 /* interface is down. update pkey and leave. */ 1204 if (level == IPOIB_FLUSH_HEAVY) { 1205 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) 1206 update_parent_pkey(priv); 1207 else 1208 update_child_pkey(priv); 1209 } else if (level == IPOIB_FLUSH_LIGHT) 1210 ipoib_dev_addr_changed_valid(priv); 1211 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n"); 1212 return; 1213 } 1214 1215 if (level == IPOIB_FLUSH_HEAVY) { 1216 /* child devices chase their origin pkey value, while non-child 1217 * (parent) devices should always takes what present in pkey index 0 1218 */ 1219 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 1220 result = update_child_pkey(priv); 1221 if (result) { 1222 /* restart QP only if P_Key index is changed */ 1223 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n"); 1224 return; 1225 } 1226 1227 } else { 1228 result = update_parent_pkey(priv); 1229 /* restart QP only if P_Key value changed */ 1230 if (result) { 1231 ipoib_dbg(priv, "Not flushing - P_Key value not changed.\n"); 1232 return; 1233 } 1234 } 1235 } 1236 1237 if (level == IPOIB_FLUSH_LIGHT) { 1238 int oper_up; 1239 ipoib_mark_paths_invalid(dev); 1240 /* Set IPoIB operation as down to prevent races between: 1241 * the flush flow which leaves MCG and on the fly joins 1242 * which can happen during that time. mcast restart task 1243 * should deal with join requests we missed. 1244 */ 1245 oper_up = test_and_clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 1246 ipoib_mcast_dev_flush(dev); 1247 if (oper_up) 1248 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 1249 ipoib_reap_dead_ahs(priv); 1250 } 1251 1252 if (level >= IPOIB_FLUSH_NORMAL) 1253 ipoib_ib_dev_down(dev); 1254 1255 if (level == IPOIB_FLUSH_HEAVY) { 1256 if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) 1257 ipoib_ib_dev_stop(dev); 1258 1259 if (ipoib_ib_dev_open(dev)) 1260 return; 1261 1262 if (netif_queue_stopped(dev)) 1263 netif_start_queue(dev); 1264 } 1265 1266 /* 1267 * The device could have been brought down between the start and when 1268 * we get here, don't bring it back up if it's not configured up 1269 */ 1270 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) { 1271 if (level >= IPOIB_FLUSH_NORMAL) 1272 ipoib_ib_dev_up(dev); 1273 if (ipoib_dev_addr_changed_valid(priv)) 1274 ipoib_mcast_restart_task(&priv->restart_task); 1275 } 1276} 1277 1278void ipoib_ib_dev_flush_light(struct work_struct *work) 1279{ 1280 struct ipoib_dev_priv *priv = 1281 container_of(work, struct ipoib_dev_priv, flush_light); 1282 1283 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT, 0); 1284} 1285 1286void ipoib_ib_dev_flush_normal(struct work_struct *work) 1287{ 1288 struct ipoib_dev_priv *priv = 1289 container_of(work, struct ipoib_dev_priv, flush_normal); 1290 1291 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL, 0); 1292} 1293 1294void ipoib_ib_dev_flush_heavy(struct work_struct *work) 1295{ 1296 struct ipoib_dev_priv *priv = 1297 container_of(work, struct ipoib_dev_priv, flush_heavy); 1298 1299 rtnl_lock(); 1300 __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY, 0); 1301 rtnl_unlock(); 1302} 1303 1304void ipoib_ib_dev_cleanup(struct net_device *dev) 1305{ 1306 struct ipoib_dev_priv *priv = ipoib_priv(dev); 1307 1308 ipoib_dbg(priv, "cleaning up ib_dev\n"); 1309 /* 1310 * We must make sure there are no more (path) completions 1311 * that may wish to touch priv fields that are no longer valid 1312 */ 1313 ipoib_flush_paths(dev); 1314 1315 ipoib_mcast_stop_thread(dev); 1316 ipoib_mcast_dev_flush(dev); 1317 1318 /* 1319 * All of our ah references aren't free until after 1320 * ipoib_mcast_dev_flush(), ipoib_flush_paths, and 1321 * the neighbor garbage collection is stopped and reaped. 1322 * That should all be done now, so make a final ah flush. 1323 */ 1324 ipoib_reap_dead_ahs(priv); 1325 1326 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 1327 1328 priv->rn_ops->ndo_uninit(dev); 1329 1330 if (priv->pd) { 1331 ib_dealloc_pd(priv->pd); 1332 priv->pd = NULL; 1333 } 1334} 1335 1336