drivers/infiniband/ulp/ipoib/ipoib_ib.c

   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
  44 #include "ipoib.h"
  45
  46 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
  47 static int data_debug_level;
  48
  49 module_param(data_debug_level, int, 0644);
  50 MODULE_PARM_DESC(data_debug_level,
  51                  "Enable data path debug tracing if > 0");
  52 #endif
  53
  54 struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
  55                                  struct ib_pd *pd, struct ib_ah_attr *attr)
  56 {
  57         struct ipoib_ah *ah;
  58         struct ib_ah *vah;
  59
  60         ah = kmalloc(sizeof *ah, GFP_KERNEL);
  61         if (!ah)
  62                 return ERR_PTR(-ENOMEM);
  63
  64         ah->dev       = dev;
  65         ah->last_send = 0;
  66         kref_init(&ah->ref);
  67
  68         vah = ib_create_ah(pd, attr);
  69         if (IS_ERR(vah)) {
  70                 kfree(ah);
  71                 ah = (struct ipoib_ah *)vah;
  72         } else {
  73                 ah->ah = vah;
  74                 ipoib_dbg(netdev_priv(dev), "Created ah %p\n", ah->ah);
  75         }
  76
  77         return ah;
  78 }
  79
  80 void ipoib_free_ah(struct kref *kref)
  81 {
  82         struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref);
  83         struct ipoib_dev_priv *priv = netdev_priv(ah->dev);
  84
  85         unsigned long flags;
  86
  87         spin_lock_irqsave(&priv->lock, flags);
  88         list_add_tail(&ah->list, &priv->dead_ahs);
  89         spin_unlock_irqrestore(&priv->lock, flags);
  90 }
  91
  92 static void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv *priv,
  93                                   u64 mapping[IPOIB_UD_RX_SG])
  94 {
  95         ib_dma_unmap_single(priv->ca, mapping[0],
  96                             IPOIB_UD_BUF_SIZE(priv->max_ib_mtu),
  97                             DMA_FROM_DEVICE);
  98 }
  99
 100 static int ipoib_ib_post_receive(struct net_device *dev, int id)
 101 {
 102         struct ipoib_dev_priv *priv = netdev_priv(dev);
 103         struct ib_recv_wr *bad_wr;
 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, &bad_wr);
 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 = netdev_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 = netdev_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 = netdev_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, "failed recv event "
 196                                    "(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
 260         skb->dev = dev;
 261         if ((dev->features & NETIF_F_RXCSUM) &&
 262                         likely(wc->wc_flags & IB_WC_IP_CSUM_OK))
 263                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 264
 265         napi_gro_receive(&priv->napi, skb);
 266
 267 repost:
 268         if (unlikely(ipoib_ib_post_receive(dev, wr_id)))
 269                 ipoib_warn(priv, "ipoib_ib_post_receive failed "
 270                            "for buf %d\n", wr_id);
 271 }
 272
 273 int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req)
 274 {
 275         struct sk_buff *skb = tx_req->skb;
 276         u64 *mapping = tx_req->mapping;
 277         int i;
 278         int off;
 279
 280         if (skb_headlen(skb)) {
 281                 mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb),
 282                                                DMA_TO_DEVICE);
 283                 if (unlikely(ib_dma_mapping_error(ca, mapping[0])))
 284                         return -EIO;
 285
 286                 off = 1;
 287         } else
 288                 off = 0;
 289
 290         for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
 291                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 292                 mapping[i + off] = ib_dma_map_page(ca,
 293                                                  skb_frag_page(frag),
 294                                                  frag->page_offset, skb_frag_size(frag),
 295                                                  DMA_TO_DEVICE);
 296                 if (unlikely(ib_dma_mapping_error(ca, mapping[i + off])))
 297                         goto partial_error;
 298         }
 299         return 0;
 300
 301 partial_error:
 302         for (; i > 0; --i) {
 303                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
 304
 305                 ib_dma_unmap_page(ca, mapping[i - !off], skb_frag_size(frag), DMA_TO_DEVICE);
 306         }
 307
 308         if (off)
 309                 ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);
 310
 311         return -EIO;
 312 }
 313
 314 void ipoib_dma_unmap_tx(struct ipoib_dev_priv *priv,
 315                         struct ipoib_tx_buf *tx_req)
 316 {
 317         struct sk_buff *skb = tx_req->skb;
 318         u64 *mapping = tx_req->mapping;
 319         int i;
 320         int off;
 321
 322         if (skb_headlen(skb)) {
 323                 ib_dma_unmap_single(priv->ca, mapping[0], skb_headlen(skb),
 324                                     DMA_TO_DEVICE);
 325                 off = 1;
 326         } else
 327                 off = 0;
 328
 329         for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
 330                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 331
 332                 ib_dma_unmap_page(priv->ca, mapping[i + off],
 333                                   skb_frag_size(frag), DMA_TO_DEVICE);
 334         }
 335 }
 336
 337 /*
 338  * As the result of a completion error the QP Can be transferred to SQE states.
 339  * The function checks if the (send)QP is in SQE state and
 340  * moves it back to RTS state, that in order to have it functional again.
 341  */
 342 static void ipoib_qp_state_validate_work(struct work_struct *work)
 343 {
 344         struct ipoib_qp_state_validate *qp_work =
 345                 container_of(work, struct ipoib_qp_state_validate, work);
 346
 347         struct ipoib_dev_priv *priv = qp_work->priv;
 348         struct ib_qp_attr qp_attr;
 349         struct ib_qp_init_attr query_init_attr;
 350         int ret;
 351
 352         ret = ib_query_qp(priv->qp, &qp_attr, IB_QP_STATE, &query_init_attr);
 353         if (ret) {
 354                 ipoib_warn(priv, "%s: Failed to query QP ret: %d\n",
 355                            __func__, ret);
 356                 goto free_res;
 357         }
 358         pr_info("%s: QP: 0x%x is in state: %d\n",
 359                 __func__, priv->qp->qp_num, qp_attr.qp_state);
 360
 361         /* currently support only in SQE->RTS transition*/
 362         if (qp_attr.qp_state == IB_QPS_SQE) {
 363                 qp_attr.qp_state = IB_QPS_RTS;
 364
 365                 ret = ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE);
 366                 if (ret) {
 367                         pr_warn("failed(%d) modify QP:0x%x SQE->RTS\n",
 368                                 ret, priv->qp->qp_num);
 369                         goto free_res;
 370                 }
 371                 pr_info("%s: QP: 0x%x moved from IB_QPS_SQE to IB_QPS_RTS\n",
 372                         __func__, priv->qp->qp_num);
 373         } else {
 374                 pr_warn("QP (%d) will stay in state: %d\n",
 375                         priv->qp->qp_num, qp_attr.qp_state);
 376         }
 377
 378 free_res:
 379         kfree(qp_work);
 380 }
 381
 382 static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
 383 {
 384         struct ipoib_dev_priv *priv = netdev_priv(dev);
 385         unsigned int wr_id = wc->wr_id;
 386         struct ipoib_tx_buf *tx_req;
 387
 388         ipoib_dbg_data(priv, "send completion: id %d, status: %d\n",
 389                        wr_id, wc->status);
 390
 391         if (unlikely(wr_id >= ipoib_sendq_size)) {
 392                 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n",
 393                            wr_id, ipoib_sendq_size);
 394                 return;
 395         }
 396
 397         tx_req = &priv->tx_ring[wr_id];
 398
 399         ipoib_dma_unmap_tx(priv, tx_req);
 400
 401         ++dev->stats.tx_packets;
 402         dev->stats.tx_bytes += tx_req->skb->len;
 403
 404         dev_kfree_skb_any(tx_req->skb);
 405
 406         ++priv->tx_tail;
 407         if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
 408             netif_queue_stopped(dev) &&
 409             test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
 410                 netif_wake_queue(dev);
 411
 412         if (wc->status != IB_WC_SUCCESS &&
 413             wc->status != IB_WC_WR_FLUSH_ERR) {
 414                 struct ipoib_qp_state_validate *qp_work;
 415                 ipoib_warn(priv, "failed send event "
 416                            "(status=%d, wrid=%d vend_err %x)\n",
 417                            wc->status, wr_id, wc->vendor_err);
 418                 qp_work = kzalloc(sizeof(*qp_work), GFP_ATOMIC);
 419                 if (!qp_work) {
 420                         ipoib_warn(priv, "%s Failed alloc ipoib_qp_state_validate for qp: 0x%x\n",
 421                                    __func__, priv->qp->qp_num);
 422                         return;
 423                 }
 424
 425                 INIT_WORK(&qp_work->work, ipoib_qp_state_validate_work);
 426                 qp_work->priv = priv;
 427                 queue_work(priv->wq, &qp_work->work);
 428         }
 429 }
 430
 431 static int poll_tx(struct ipoib_dev_priv *priv)
 432 {
 433         int n, i;
 434
 435         n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc);
 436         for (i = 0; i < n; ++i)
 437                 ipoib_ib_handle_tx_wc(priv->dev, priv->send_wc + i);
 438
 439         return n == MAX_SEND_CQE;
 440 }
 441
 442 int ipoib_poll(struct napi_struct *napi, int budget)
 443 {
 444         struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi);
 445         struct net_device *dev = priv->dev;
 446         int done;
 447         int t;
 448         int n, i;
 449
 450         done  = 0;
 451
 452 poll_more:
 453         while (done < budget) {
 454                 int max = (budget - done);
 455
 456                 t = min(IPOIB_NUM_WC, max);
 457                 n = ib_poll_cq(priv->recv_cq, t, priv->ibwc);
 458
 459                 for (i = 0; i < n; i++) {
 460                         struct ib_wc *wc = priv->ibwc + i;
 461
 462                         if (wc->wr_id & IPOIB_OP_RECV) {
 463                                 ++done;
 464                                 if (wc->wr_id & IPOIB_OP_CM)
 465                                         ipoib_cm_handle_rx_wc(dev, wc);
 466                                 else
 467                                         ipoib_ib_handle_rx_wc(dev, wc);
 468                         } else
 469                                 ipoib_cm_handle_tx_wc(priv->dev, wc);
 470                 }
 471
 472                 if (n != t)
 473                         break;
 474         }
 475
 476         if (done < budget) {
 477                 napi_complete(napi);
 478                 if (unlikely(ib_req_notify_cq(priv->recv_cq,
 479                                               IB_CQ_NEXT_COMP |
 480                                               IB_CQ_REPORT_MISSED_EVENTS)) &&
 481                     napi_reschedule(napi))
 482                         goto poll_more;
 483         }
 484
 485         return done;
 486 }
 487
 488 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
 489 {
 490         struct net_device *dev = dev_ptr;
 491         struct ipoib_dev_priv *priv = netdev_priv(dev);
 492
 493         napi_schedule(&priv->napi);
 494 }
 495
 496 static void drain_tx_cq(struct net_device *dev)
 497 {
 498         struct ipoib_dev_priv *priv = netdev_priv(dev);
 499
 500         netif_tx_lock(dev);
 501         while (poll_tx(priv))
 502                 ; /* nothing */
 503
 504         if (netif_queue_stopped(dev))
 505                 mod_timer(&priv->poll_timer, jiffies + 1);
 506
 507         netif_tx_unlock(dev);
 508 }
 509
 510 void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr)
 511 {
 512         struct ipoib_dev_priv *priv = netdev_priv(dev_ptr);
 513
 514         mod_timer(&priv->poll_timer, jiffies);
 515 }
 516
 517 static inline int post_send(struct ipoib_dev_priv *priv,
 518                             unsigned int wr_id,
 519                             struct ib_ah *address, u32 qpn,
 520                             struct ipoib_tx_buf *tx_req,
 521                             void *head, int hlen)
 522 {
 523         struct ib_send_wr *bad_wr;
 524         struct sk_buff *skb = tx_req->skb;
 525
 526         ipoib_build_sge(priv, tx_req);
 527
 528         priv->tx_wr.wr.wr_id    = wr_id;
 529         priv->tx_wr.remote_qpn  = qpn;
 530         priv->tx_wr.ah          = address;
 531
 532         if (head) {
 533                 priv->tx_wr.mss         = skb_shinfo(skb)->gso_size;
 534                 priv->tx_wr.header      = head;
 535                 priv->tx_wr.hlen        = hlen;
 536                 priv->tx_wr.wr.opcode   = IB_WR_LSO;
 537         } else
 538                 priv->tx_wr.wr.opcode   = IB_WR_SEND;
 539
 540         return ib_post_send(priv->qp, &priv->tx_wr.wr, &bad_wr);
 541 }
 542
 543 void ipoib_send(struct net_device *dev, struct sk_buff *skb,
 544                 struct ipoib_ah *address, u32 qpn)
 545 {
 546         struct ipoib_dev_priv *priv = netdev_priv(dev);
 547         struct ipoib_tx_buf *tx_req;
 548         int hlen, rc;
 549         void *phead;
 550         unsigned usable_sge = priv->max_send_sge - !!skb_headlen(skb);
 551
 552         if (skb_is_gso(skb)) {
 553                 hlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
 554                 phead = skb->data;
 555                 if (unlikely(!skb_pull(skb, hlen))) {
 556                         ipoib_warn(priv, "linear data too small\n");
 557                         ++dev->stats.tx_dropped;
 558                         ++dev->stats.tx_errors;
 559                         dev_kfree_skb_any(skb);
 560                         return;
 561                 }
 562         } else {
 563                 if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) {
 564                         ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
 565                                    skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN);
 566                         ++dev->stats.tx_dropped;
 567                         ++dev->stats.tx_errors;
 568                         ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu);
 569                         return;
 570                 }
 571                 phead = NULL;
 572                 hlen  = 0;
 573         }
 574         if (skb_shinfo(skb)->nr_frags > usable_sge) {
 575                 if (skb_linearize(skb) < 0) {
 576                         ipoib_warn(priv, "skb could not be linearized\n");
 577                         ++dev->stats.tx_dropped;
 578                         ++dev->stats.tx_errors;
 579                         dev_kfree_skb_any(skb);
 580                         return;
 581                 }
 582                 /* Does skb_linearize return ok without reducing nr_frags? */
 583                 if (skb_shinfo(skb)->nr_frags > usable_sge) {
 584                         ipoib_warn(priv, "too many frags after skb linearize\n");
 585                         ++dev->stats.tx_dropped;
 586                         ++dev->stats.tx_errors;
 587                         dev_kfree_skb_any(skb);
 588                         return;
 589                 }
 590         }
 591
 592         ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n",
 593                        skb->len, address, qpn);
 594
 595         /*
 596          * We put the skb into the tx_ring _before_ we call post_send()
 597          * because it's entirely possible that the completion handler will
 598          * run before we execute anything after the post_send().  That
 599          * means we have to make sure everything is properly recorded and
 600          * our state is consistent before we call post_send().
 601          */
 602         tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
 603         tx_req->skb = skb;
 604         if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) {
 605                 ++dev->stats.tx_errors;
 606                 dev_kfree_skb_any(skb);
 607                 return;
 608         }
 609
 610         if (skb->ip_summed == CHECKSUM_PARTIAL)
 611                 priv->tx_wr.wr.send_flags |= IB_SEND_IP_CSUM;
 612         else
 613                 priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM;
 614
 615         if (++priv->tx_outstanding == ipoib_sendq_size) {
 616                 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
 617                 if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP))
 618                         ipoib_warn(priv, "request notify on send CQ failed\n");
 619                 netif_stop_queue(dev);
 620         }
 621
 622         skb_orphan(skb);
 623         skb_dst_drop(skb);
 624
 625         rc = post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),
 626                        address->ah, qpn, tx_req, phead, hlen);
 627         if (unlikely(rc)) {
 628                 ipoib_warn(priv, "post_send failed, error %d\n", rc);
 629                 ++dev->stats.tx_errors;
 630                 --priv->tx_outstanding;
 631                 ipoib_dma_unmap_tx(priv, tx_req);
 632                 dev_kfree_skb_any(skb);
 633                 if (netif_queue_stopped(dev))
 634                         netif_wake_queue(dev);
 635         } else {
 636                 netif_trans_update(dev);
 637
 638                 address->last_send = priv->tx_head;
 639                 ++priv->tx_head;
 640         }
 641
 642         if (unlikely(priv->tx_outstanding > MAX_SEND_CQE))
 643                 while (poll_tx(priv))
 644                         ; /* nothing */
 645 }
 646
 647 static void __ipoib_reap_ah(struct net_device *dev)
 648 {
 649         struct ipoib_dev_priv *priv = netdev_priv(dev);
 650         struct ipoib_ah *ah, *tah;
 651         LIST_HEAD(remove_list);
 652         unsigned long flags;
 653
 654         netif_tx_lock_bh(dev);
 655         spin_lock_irqsave(&priv->lock, flags);
 656
 657         list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
 658                 if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
 659                         list_del(&ah->list);
 660                         ib_destroy_ah(ah->ah);
 661                         kfree(ah);
 662                 }
 663
 664         spin_unlock_irqrestore(&priv->lock, flags);
 665         netif_tx_unlock_bh(dev);
 666 }
 667
 668 void ipoib_reap_ah(struct work_struct *work)
 669 {
 670         struct ipoib_dev_priv *priv =
 671                 container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
 672         struct net_device *dev = priv->dev;
 673
 674         __ipoib_reap_ah(dev);
 675
 676         if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
 677                 queue_delayed_work(priv->wq, &priv->ah_reap_task,
 678                                    round_jiffies_relative(HZ));
 679 }
 680
 681 static void ipoib_flush_ah(struct net_device *dev)
 682 {
 683         struct ipoib_dev_priv *priv = netdev_priv(dev);
 684
 685         cancel_delayed_work(&priv->ah_reap_task);
 686         flush_workqueue(priv->wq);
 687         ipoib_reap_ah(&priv->ah_reap_task.work);
 688 }
 689
 690 static void ipoib_stop_ah(struct net_device *dev)
 691 {
 692         struct ipoib_dev_priv *priv = netdev_priv(dev);
 693
 694         set_bit(IPOIB_STOP_REAPER, &priv->flags);
 695         ipoib_flush_ah(dev);
 696 }
 697
 698 static void ipoib_ib_tx_timer_func(unsigned long ctx)
 699 {
 700         drain_tx_cq((struct net_device *)ctx);
 701 }
 702
 703 int ipoib_ib_dev_open(struct net_device *dev)
 704 {
 705         struct ipoib_dev_priv *priv = netdev_priv(dev);
 706         int ret;
 707
 708         ipoib_pkey_dev_check_presence(dev);
 709
 710         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
 711                 ipoib_warn(priv, "P_Key 0x%04x is %s\n", priv->pkey,
 712                            (!(priv->pkey & 0x7fff) ? "Invalid" : "not found"));
 713                 return -1;
 714         }
 715
 716         ret = ipoib_init_qp(dev);
 717         if (ret) {
 718                 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
 719                 return -1;
 720         }
 721
 722         ret = ipoib_ib_post_receives(dev);
 723         if (ret) {
 724                 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
 725                 goto dev_stop;
 726         }
 727
 728         ret = ipoib_cm_dev_open(dev);
 729         if (ret) {
 730                 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret);
 731                 goto dev_stop;
 732         }
 733
 734         clear_bit(IPOIB_STOP_REAPER, &priv->flags);
 735         queue_delayed_work(priv->wq, &priv->ah_reap_task,
 736                            round_jiffies_relative(HZ));
 737
 738         if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
 739                 napi_enable(&priv->napi);
 740
 741         return 0;
 742 dev_stop:
 743         if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
 744                 napi_enable(&priv->napi);
 745         ipoib_ib_dev_stop(dev);
 746         return -1;
 747 }
 748
 749 void ipoib_pkey_dev_check_presence(struct net_device *dev)
 750 {
 751         struct ipoib_dev_priv *priv = netdev_priv(dev);
 752
 753         if (!(priv->pkey & 0x7fff) ||
 754             ib_find_pkey(priv->ca, priv->port, priv->pkey,
 755                          &priv->pkey_index))
 756                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 757         else
 758                 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 759 }
 760
 761 int ipoib_ib_dev_up(struct net_device *dev)
 762 {
 763         struct ipoib_dev_priv *priv = netdev_priv(dev);
 764
 765         ipoib_pkey_dev_check_presence(dev);
 766
 767         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
 768                 ipoib_dbg(priv, "PKEY is not assigned.\n");
 769                 return 0;
 770         }
 771
 772         set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
 773
 774         return ipoib_mcast_start_thread(dev);
 775 }
 776
 777 int ipoib_ib_dev_down(struct net_device *dev)
 778 {
 779         struct ipoib_dev_priv *priv = netdev_priv(dev);
 780
 781         ipoib_dbg(priv, "downing ib_dev\n");
 782
 783         clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
 784         netif_carrier_off(dev);
 785
 786         ipoib_mcast_stop_thread(dev);
 787         ipoib_mcast_dev_flush(dev);
 788
 789         ipoib_flush_paths(dev);
 790
 791         return 0;
 792 }
 793
 794 static int recvs_pending(struct net_device *dev)
 795 {
 796         struct ipoib_dev_priv *priv = netdev_priv(dev);
 797         int pending = 0;
 798         int i;
 799
 800         for (i = 0; i < ipoib_recvq_size; ++i)
 801                 if (priv->rx_ring[i].skb)
 802                         ++pending;
 803
 804         return pending;
 805 }
 806
 807 void ipoib_drain_cq(struct net_device *dev)
 808 {
 809         struct ipoib_dev_priv *priv = netdev_priv(dev);
 810         int i, n;
 811
 812         /*
 813          * We call completion handling routines that expect to be
 814          * called from the BH-disabled NAPI poll context, so disable
 815          * BHs here too.
 816          */
 817         local_bh_disable();
 818
 819         do {
 820                 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc);
 821                 for (i = 0; i < n; ++i) {
 822                         /*
 823                          * Convert any successful completions to flush
 824                          * errors to avoid passing packets up the
 825                          * stack after bringing the device down.
 826                          */
 827                         if (priv->ibwc[i].status == IB_WC_SUCCESS)
 828                                 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
 829
 830                         if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) {
 831                                 if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
 832                                         ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
 833                                 else
 834                                         ipoib_ib_handle_rx_wc(dev, priv->ibwc + i);
 835                         } else
 836                                 ipoib_cm_handle_tx_wc(dev, priv->ibwc + i);
 837                 }
 838         } while (n == IPOIB_NUM_WC);
 839
 840         while (poll_tx(priv))
 841                 ; /* nothing */
 842
 843         local_bh_enable();
 844 }
 845
 846 int ipoib_ib_dev_stop(struct net_device *dev)
 847 {
 848         struct ipoib_dev_priv *priv = netdev_priv(dev);
 849         struct ib_qp_attr qp_attr;
 850         unsigned long begin;
 851         struct ipoib_tx_buf *tx_req;
 852         int i;
 853
 854         if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
 855                 napi_disable(&priv->napi);
 856
 857         ipoib_cm_dev_stop(dev);
 858
 859         /*
 860          * Move our QP to the error state and then reinitialize in
 861          * when all work requests have completed or have been flushed.
 862          */
 863         qp_attr.qp_state = IB_QPS_ERR;
 864         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
 865                 ipoib_warn(priv, "Failed to modify QP to ERROR state\n");
 866
 867         /* Wait for all sends and receives to complete */
 868         begin = jiffies;
 869
 870         while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) {
 871                 if (time_after(jiffies, begin + 5 * HZ)) {
 872                         ipoib_warn(priv, "timing out; %d sends %d receives not completed\n",
 873                                    priv->tx_head - priv->tx_tail, recvs_pending(dev));
 874
 875                         /*
 876                          * assume the HW is wedged and just free up
 877                          * all our pending work requests.
 878                          */
 879                         while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
 880                                 tx_req = &priv->tx_ring[priv->tx_tail &
 881                                                         (ipoib_sendq_size - 1)];
 882                                 ipoib_dma_unmap_tx(priv, tx_req);
 883                                 dev_kfree_skb_any(tx_req->skb);
 884                                 ++priv->tx_tail;
 885                                 --priv->tx_outstanding;
 886                         }
 887
 888                         for (i = 0; i < ipoib_recvq_size; ++i) {
 889                                 struct ipoib_rx_buf *rx_req;
 890
 891                                 rx_req = &priv->rx_ring[i];
 892                                 if (!rx_req->skb)
 893                                         continue;
 894                                 ipoib_ud_dma_unmap_rx(priv,
 895                                                       priv->rx_ring[i].mapping);
 896                                 dev_kfree_skb_any(rx_req->skb);
 897                                 rx_req->skb = NULL;
 898                         }
 899
 900                         goto timeout;
 901                 }
 902
 903                 ipoib_drain_cq(dev);
 904
 905                 msleep(1);
 906         }
 907
 908         ipoib_dbg(priv, "All sends and receives done.\n");
 909
 910 timeout:
 911         del_timer_sync(&priv->poll_timer);
 912         qp_attr.qp_state = IB_QPS_RESET;
 913         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
 914                 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
 915
 916         ipoib_flush_ah(dev);
 917
 918         ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP);
 919
 920         return 0;
 921 }
 922
 923 int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
 924 {
 925         struct ipoib_dev_priv *priv = netdev_priv(dev);
 926
 927         priv->ca = ca;
 928         priv->port = port;
 929         priv->qp = NULL;
 930
 931         if (ipoib_transport_dev_init(dev, ca)) {
 932                 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name);
 933                 return -ENODEV;
 934         }
 935
 936         setup_timer(&priv->poll_timer, ipoib_ib_tx_timer_func,
 937                     (unsigned long) dev);
 938
 939         if (dev->flags & IFF_UP) {
 940                 if (ipoib_ib_dev_open(dev)) {
 941                         ipoib_transport_dev_cleanup(dev);
 942                         return -ENODEV;
 943                 }
 944         }
 945
 946         return 0;
 947 }
 948
 949 /*
 950  * Takes whatever value which is in pkey index 0 and updates priv->pkey
 951  * returns 0 if the pkey value was changed.
 952  */
 953 static inline int update_parent_pkey(struct ipoib_dev_priv *priv)
 954 {
 955         int result;
 956         u16 prev_pkey;
 957
 958         prev_pkey = priv->pkey;
 959         result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey);
 960         if (result) {
 961                 ipoib_warn(priv, "ib_query_pkey port %d failed (ret = %d)\n",
 962                            priv->port, result);
 963                 return result;
 964         }
 965
 966         priv->pkey |= 0x8000;
 967
 968         if (prev_pkey != priv->pkey) {
 969                 ipoib_dbg(priv, "pkey changed from 0x%x to 0x%x\n",
 970                           prev_pkey, priv->pkey);
 971                 /*
 972                  * Update the pkey in the broadcast address, while making sure to set
 973                  * the full membership bit, so that we join the right broadcast group.
 974                  */
 975                 priv->dev->broadcast[8] = priv->pkey >> 8;
 976                 priv->dev->broadcast[9] = priv->pkey & 0xff;
 977                 return 0;
 978         }
 979
 980         return 1;
 981 }
 982 /*
 983  * returns 0 if pkey value was found in a different slot.
 984  */
 985 static inline int update_child_pkey(struct ipoib_dev_priv *priv)
 986 {
 987         u16 old_index = priv->pkey_index;
 988
 989         priv->pkey_index = 0;
 990         ipoib_pkey_dev_check_presence(priv->dev);
 991
 992         if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
 993             (old_index == priv->pkey_index))
 994                 return 1;
 995         return 0;
 996 }
 997
 998 /*
 999  * returns true if the device address of the ipoib interface has changed and the
1000  * new address is a valid one (i.e in the gid table), return false otherwise.
1001  */
1002 static bool ipoib_dev_addr_changed_valid(struct ipoib_dev_priv *priv)
1003 {
1004         union ib_gid search_gid;
1005         union ib_gid gid0;
1006         union ib_gid *netdev_gid;
1007         int err;
1008         u16 index;
1009         u8 port;
1010         bool ret = false;
1011
1012         netdev_gid = (union ib_gid *)(priv->dev->dev_addr + 4);
1013         if (ib_query_gid(priv->ca, priv->port, 0, &gid0, NULL))
1014                 return false;
1015
1016         netif_addr_lock_bh(priv->dev);
1017
1018         /* The subnet prefix may have changed, update it now so we won't have
1019          * to do it later
1020          */
1021         priv->local_gid.global.subnet_prefix = gid0.global.subnet_prefix;
1022         netdev_gid->global.subnet_prefix = gid0.global.subnet_prefix;
1023         search_gid.global.subnet_prefix = gid0.global.subnet_prefix;
1024
1025         search_gid.global.interface_id = priv->local_gid.global.interface_id;
1026
1027         netif_addr_unlock_bh(priv->dev);
1028
1029         err = ib_find_gid(priv->ca, &search_gid, IB_GID_TYPE_IB,
1030                           priv->dev, &port, &index);
1031
1032         netif_addr_lock_bh(priv->dev);
1033
1034         if (search_gid.global.interface_id !=
1035             priv->local_gid.global.interface_id)
1036                 /* There was a change while we were looking up the gid, bail
1037                  * here and let the next work sort this out
1038                  */
1039                 goto out;
1040
1041         /* The next section of code needs some background:
1042          * Per IB spec the port GUID can't change if the HCA is powered on.
1043          * port GUID is the basis for GID at index 0 which is the basis for
1044          * the default device address of a ipoib interface.
1045          *
1046          * so it seems the flow should be:
1047          * if user_changed_dev_addr && gid in gid tbl
1048          *      set bit dev_addr_set
1049          *      return true
1050          * else
1051          *      return false
1052          *
1053          * The issue is that there are devices that don't follow the spec,
1054          * they change the port GUID when the HCA is powered, so in order
1055          * not to break userspace applications, We need to check if the
1056          * user wanted to control the device address and we assume that
1057          * if he sets the device address back to be based on GID index 0,
1058          * he no longer wishs to control it.
1059          *
1060          * If the user doesn't control the the device address,
1061          * IPOIB_FLAG_DEV_ADDR_SET is set and ib_find_gid failed it means
1062          * the port GUID has changed and GID at index 0 has changed
1063          * so we need to change priv->local_gid and priv->dev->dev_addr
1064          * to reflect the new GID.
1065          */
1066         if (!test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) {
1067                 if (!err && port == priv->port) {
1068                         set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags);
1069                         if (index == 0)
1070                                 clear_bit(IPOIB_FLAG_DEV_ADDR_CTRL,
1071                                           &priv->flags);
1072                         else
1073                                 set_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags);
1074                         ret = true;
1075                 } else {
1076                         ret = false;
1077                 }
1078         } else {
1079                 if (!err && port == priv->port) {
1080                         ret = true;
1081                 } else {
1082                         if (!test_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags)) {
1083                                 memcpy(&priv->local_gid, &gid0,
1084                                        sizeof(priv->local_gid));
1085                                 memcpy(priv->dev->dev_addr + 4, &gid0,
1086                                        sizeof(priv->local_gid));
1087                                 ret = true;
1088                         }
1089                 }
1090         }
1091
1092 out:
1093         netif_addr_unlock_bh(priv->dev);
1094
1095         return ret;
1096 }
1097
1098 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
1099                                 enum ipoib_flush_level level,
1100                                 int nesting)
1101 {
1102         struct ipoib_dev_priv *cpriv;
1103         struct net_device *dev = priv->dev;
1104         int result;
1105
1106         down_read_nested(&priv->vlan_rwsem, nesting);
1107
1108         /*
1109          * Flush any child interfaces too -- they might be up even if
1110          * the parent is down.
1111          */
1112         list_for_each_entry(cpriv, &priv->child_intfs, list)
1113                 __ipoib_ib_dev_flush(cpriv, level, nesting + 1);
1114
1115         up_read(&priv->vlan_rwsem);
1116
1117         if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) &&
1118             level != IPOIB_FLUSH_HEAVY) {
1119                 /* Make sure the dev_addr is set even if not flushing */
1120                 if (level == IPOIB_FLUSH_LIGHT)
1121                         ipoib_dev_addr_changed_valid(priv);
1122                 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
1123                 return;
1124         }
1125
1126         if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
1127                 /* interface is down. update pkey and leave. */
1128                 if (level == IPOIB_FLUSH_HEAVY) {
1129                         if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags))
1130                                 update_parent_pkey(priv);
1131                         else
1132                                 update_child_pkey(priv);
1133                 } else if (level == IPOIB_FLUSH_LIGHT)
1134                         ipoib_dev_addr_changed_valid(priv);
1135                 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
1136                 return;
1137         }
1138
1139         if (level == IPOIB_FLUSH_HEAVY) {
1140                 /* child devices chase their origin pkey value, while non-child
1141                  * (parent) devices should always takes what present in pkey index 0
1142                  */
1143                 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
1144                         result = update_child_pkey(priv);
1145                         if (result) {
1146                                 /* restart QP only if P_Key index is changed */
1147                                 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
1148                                 return;
1149                         }
1150
1151                 } else {
1152                         result = update_parent_pkey(priv);
1153                         /* restart QP only if P_Key value changed */
1154                         if (result) {
1155                                 ipoib_dbg(priv, "Not flushing - P_Key value not changed.\n");
1156                                 return;
1157                         }
1158                 }
1159         }
1160
1161         if (level == IPOIB_FLUSH_LIGHT) {
1162                 int oper_up;
1163                 ipoib_mark_paths_invalid(dev);
1164                 /* Set IPoIB operation as down to prevent races between:
1165                  * the flush flow which leaves MCG and on the fly joins
1166                  * which can happen during that time. mcast restart task
1167                  * should deal with join requests we missed.
1168                  */
1169                 oper_up = test_and_clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
1170                 ipoib_mcast_dev_flush(dev);
1171                 if (oper_up)
1172                         set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
1173                 ipoib_flush_ah(dev);
1174         }
1175
1176         if (level >= IPOIB_FLUSH_NORMAL)
1177                 ipoib_ib_dev_down(dev);
1178
1179         if (level == IPOIB_FLUSH_HEAVY) {
1180                 if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
1181                         ipoib_ib_dev_stop(dev);
1182                 if (ipoib_ib_dev_open(dev) != 0)
1183                         return;
1184                 if (netif_queue_stopped(dev))
1185                         netif_start_queue(dev);
1186         }
1187
1188         /*
1189          * The device could have been brought down between the start and when
1190          * we get here, don't bring it back up if it's not configured up
1191          */
1192         if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
1193                 if (level >= IPOIB_FLUSH_NORMAL)
1194                         ipoib_ib_dev_up(dev);
1195                 if (ipoib_dev_addr_changed_valid(priv))
1196                         ipoib_mcast_restart_task(&priv->restart_task);
1197         }
1198 }
1199
1200 void ipoib_ib_dev_flush_light(struct work_struct *work)
1201 {
1202         struct ipoib_dev_priv *priv =
1203                 container_of(work, struct ipoib_dev_priv, flush_light);
1204
1205         __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT, 0);
1206 }
1207
1208 void ipoib_ib_dev_flush_normal(struct work_struct *work)
1209 {
1210         struct ipoib_dev_priv *priv =
1211                 container_of(work, struct ipoib_dev_priv, flush_normal);
1212
1213         __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL, 0);
1214 }
1215
1216 void ipoib_ib_dev_flush_heavy(struct work_struct *work)
1217 {
1218         struct ipoib_dev_priv *priv =
1219                 container_of(work, struct ipoib_dev_priv, flush_heavy);
1220
1221         __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY, 0);
1222 }
1223
1224 void ipoib_ib_dev_cleanup(struct net_device *dev)
1225 {
1226         struct ipoib_dev_priv *priv = netdev_priv(dev);
1227
1228         ipoib_dbg(priv, "cleaning up ib_dev\n");
1229         /*
1230          * We must make sure there are no more (path) completions
1231          * that may wish to touch priv fields that are no longer valid
1232          */
1233         ipoib_flush_paths(dev);
1234
1235         ipoib_mcast_stop_thread(dev);
1236         ipoib_mcast_dev_flush(dev);
1237
1238         /*
1239          * All of our ah references aren't free until after
1240          * ipoib_mcast_dev_flush(), ipoib_flush_paths, and
1241          * the neighbor garbage collection is stopped and reaped.
1242          * That should all be done now, so make a final ah flush.
1243          */
1244         ipoib_stop_ah(dev);
1245
1246         ipoib_transport_dev_cleanup(dev);
1247 }
1248
1249