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 rdma_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 = rdma_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(ipoib_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 = ipoib_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 = ipoib_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 = 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, "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 = ipoib_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                         return;
 421
 422                 INIT_WORK(&qp_work->work, ipoib_qp_state_validate_work);
 423                 qp_work->priv = priv;
 424                 queue_work(priv->wq, &qp_work->work);
 425         }
 426 }
 427
 428 static int poll_tx(struct ipoib_dev_priv *priv)
 429 {
 430         int n, i;
 431
 432         n = ib_poll_cq(priv->send_cq, MAX_SEND_CQE, priv->send_wc);
 433         for (i = 0; i < n; ++i)
 434                 ipoib_ib_handle_tx_wc(priv->dev, priv->send_wc + i);
 435
 436         return n == MAX_SEND_CQE;
 437 }
 438
 439 int ipoib_poll(struct napi_struct *napi, int budget)
 440 {
 441         struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi);
 442         struct net_device *dev = priv->dev;
 443         int done;
 444         int t;
 445         int n, i;
 446
 447         done  = 0;
 448
 449 poll_more:
 450         while (done < budget) {
 451                 int max = (budget - done);
 452
 453                 t = min(IPOIB_NUM_WC, max);
 454                 n = ib_poll_cq(priv->recv_cq, t, priv->ibwc);
 455
 456                 for (i = 0; i < n; i++) {
 457                         struct ib_wc *wc = priv->ibwc + i;
 458
 459                         if (wc->wr_id & IPOIB_OP_RECV) {
 460                                 ++done;
 461                                 if (wc->wr_id & IPOIB_OP_CM)
 462                                         ipoib_cm_handle_rx_wc(dev, wc);
 463                                 else
 464                                         ipoib_ib_handle_rx_wc(dev, wc);
 465                         } else
 466                                 ipoib_cm_handle_tx_wc(priv->dev, wc);
 467                 }
 468
 469                 if (n != t)
 470                         break;
 471         }
 472
 473         if (done < budget) {
 474                 napi_complete(napi);
 475                 if (unlikely(ib_req_notify_cq(priv->recv_cq,
 476                                               IB_CQ_NEXT_COMP |
 477                                               IB_CQ_REPORT_MISSED_EVENTS)) &&
 478                     napi_reschedule(napi))
 479                         goto poll_more;
 480         }
 481
 482         return done;
 483 }
 484
 485 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
 486 {
 487         struct net_device *dev = dev_ptr;
 488         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 489
 490         napi_schedule(&priv->napi);
 491 }
 492
 493 static void drain_tx_cq(struct net_device *dev)
 494 {
 495         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 496
 497         netif_tx_lock(dev);
 498         while (poll_tx(priv))
 499                 ; /* nothing */
 500
 501         if (netif_queue_stopped(dev))
 502                 mod_timer(&priv->poll_timer, jiffies + 1);
 503
 504         netif_tx_unlock(dev);
 505 }
 506
 507 void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr)
 508 {
 509         struct ipoib_dev_priv *priv = ipoib_priv(dev_ptr);
 510
 511         mod_timer(&priv->poll_timer, jiffies);
 512 }
 513
 514 static inline int post_send(struct ipoib_dev_priv *priv,
 515                             unsigned int wr_id,
 516                             struct ib_ah *address, u32 dqpn,
 517                             struct ipoib_tx_buf *tx_req,
 518                             void *head, int hlen)
 519 {
 520         struct ib_send_wr *bad_wr;
 521         struct sk_buff *skb = tx_req->skb;
 522
 523         ipoib_build_sge(priv, tx_req);
 524
 525         priv->tx_wr.wr.wr_id    = wr_id;
 526         priv->tx_wr.remote_qpn  = dqpn;
 527         priv->tx_wr.ah          = address;
 528
 529         if (head) {
 530                 priv->tx_wr.mss         = skb_shinfo(skb)->gso_size;
 531                 priv->tx_wr.header      = head;
 532                 priv->tx_wr.hlen        = hlen;
 533                 priv->tx_wr.wr.opcode   = IB_WR_LSO;
 534         } else
 535                 priv->tx_wr.wr.opcode   = IB_WR_SEND;
 536
 537         return ib_post_send(priv->qp, &priv->tx_wr.wr, &bad_wr);
 538 }
 539
 540 int ipoib_send(struct net_device *dev, struct sk_buff *skb,
 541                struct ib_ah *address, u32 dqpn)
 542 {
 543         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 544         struct ipoib_tx_buf *tx_req;
 545         int hlen, rc;
 546         void *phead;
 547         unsigned usable_sge = priv->max_send_sge - !!skb_headlen(skb);
 548
 549         if (skb_is_gso(skb)) {
 550                 hlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
 551                 phead = skb->data;
 552                 if (unlikely(!skb_pull(skb, hlen))) {
 553                         ipoib_warn(priv, "linear data too small\n");
 554                         ++dev->stats.tx_dropped;
 555                         ++dev->stats.tx_errors;
 556                         dev_kfree_skb_any(skb);
 557                         return -1;
 558                 }
 559         } else {
 560                 if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) {
 561                         ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
 562                                    skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN);
 563                         ++dev->stats.tx_dropped;
 564                         ++dev->stats.tx_errors;
 565                         ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu);
 566                         return -1;
 567                 }
 568                 phead = NULL;
 569                 hlen  = 0;
 570         }
 571         if (skb_shinfo(skb)->nr_frags > usable_sge) {
 572                 if (skb_linearize(skb) < 0) {
 573                         ipoib_warn(priv, "skb could not be linearized\n");
 574                         ++dev->stats.tx_dropped;
 575                         ++dev->stats.tx_errors;
 576                         dev_kfree_skb_any(skb);
 577                         return -1;
 578                 }
 579                 /* Does skb_linearize return ok without reducing nr_frags? */
 580                 if (skb_shinfo(skb)->nr_frags > usable_sge) {
 581                         ipoib_warn(priv, "too many frags after skb linearize\n");
 582                         ++dev->stats.tx_dropped;
 583                         ++dev->stats.tx_errors;
 584                         dev_kfree_skb_any(skb);
 585                         return -1;
 586                 }
 587         }
 588
 589         ipoib_dbg_data(priv,
 590                        "sending packet, length=%d address=%p dqpn=0x%06x\n",
 591                        skb->len, address, dqpn);
 592
 593         /*
 594          * We put the skb into the tx_ring _before_ we call post_send()
 595          * because it's entirely possible that the completion handler will
 596          * run before we execute anything after the post_send().  That
 597          * means we have to make sure everything is properly recorded and
 598          * our state is consistent before we call post_send().
 599          */
 600         tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
 601         tx_req->skb = skb;
 602         if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) {
 603                 ++dev->stats.tx_errors;
 604                 dev_kfree_skb_any(skb);
 605                 return -1;
 606         }
 607
 608         if (skb->ip_summed == CHECKSUM_PARTIAL)
 609                 priv->tx_wr.wr.send_flags |= IB_SEND_IP_CSUM;
 610         else
 611                 priv->tx_wr.wr.send_flags &= ~IB_SEND_IP_CSUM;
 612
 613         if (++priv->tx_outstanding == ipoib_sendq_size) {
 614                 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
 615                 if (ib_req_notify_cq(priv->send_cq, IB_CQ_NEXT_COMP))
 616                         ipoib_warn(priv, "request notify on send CQ failed\n");
 617                 netif_stop_queue(dev);
 618         }
 619
 620         skb_orphan(skb);
 621         skb_dst_drop(skb);
 622
 623         rc = post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),
 624                        address, dqpn, tx_req, phead, hlen);
 625         if (unlikely(rc)) {
 626                 ipoib_warn(priv, "post_send failed, error %d\n", rc);
 627                 ++dev->stats.tx_errors;
 628                 --priv->tx_outstanding;
 629                 ipoib_dma_unmap_tx(priv, tx_req);
 630                 dev_kfree_skb_any(skb);
 631                 if (netif_queue_stopped(dev))
 632                         netif_wake_queue(dev);
 633                 rc = 0;
 634         } else {
 635                 netif_trans_update(dev);
 636
 637                 rc = priv->tx_head;
 638                 ++priv->tx_head;
 639         }
 640
 641         if (unlikely(priv->tx_outstanding > MAX_SEND_CQE))
 642                 while (poll_tx(priv))
 643                         ; /* nothing */
 644
 645         return rc;
 646 }
 647
 648 static void __ipoib_reap_ah(struct net_device *dev)
 649 {
 650         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 651         struct ipoib_ah *ah, *tah;
 652         LIST_HEAD(remove_list);
 653         unsigned long flags;
 654
 655         netif_tx_lock_bh(dev);
 656         spin_lock_irqsave(&priv->lock, flags);
 657
 658         list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
 659                 if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
 660                         list_del(&ah->list);
 661                         rdma_destroy_ah(ah->ah);
 662                         kfree(ah);
 663                 }
 664
 665         spin_unlock_irqrestore(&priv->lock, flags);
 666         netif_tx_unlock_bh(dev);
 667 }
 668
 669 void ipoib_reap_ah(struct work_struct *work)
 670 {
 671         struct ipoib_dev_priv *priv =
 672                 container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
 673         struct net_device *dev = priv->dev;
 674
 675         __ipoib_reap_ah(dev);
 676
 677         if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
 678                 queue_delayed_work(priv->wq, &priv->ah_reap_task,
 679                                    round_jiffies_relative(HZ));
 680 }
 681
 682 static void ipoib_flush_ah(struct net_device *dev)
 683 {
 684         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 685
 686         cancel_delayed_work(&priv->ah_reap_task);
 687         flush_workqueue(priv->wq);
 688         ipoib_reap_ah(&priv->ah_reap_task.work);
 689 }
 690
 691 static void ipoib_stop_ah(struct net_device *dev)
 692 {
 693         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 694
 695         set_bit(IPOIB_STOP_REAPER, &priv->flags);
 696         ipoib_flush_ah(dev);
 697 }
 698
 699 static int recvs_pending(struct net_device *dev)
 700 {
 701         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 702         int pending = 0;
 703         int i;
 704
 705         for (i = 0; i < ipoib_recvq_size; ++i)
 706                 if (priv->rx_ring[i].skb)
 707                         ++pending;
 708
 709         return pending;
 710 }
 711
 712 int ipoib_ib_dev_stop_default(struct net_device *dev)
 713 {
 714         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 715         struct ib_qp_attr qp_attr;
 716         unsigned long begin;
 717         struct ipoib_tx_buf *tx_req;
 718         int i;
 719
 720         if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
 721                 napi_disable(&priv->napi);
 722
 723         ipoib_cm_dev_stop(dev);
 724
 725         /*
 726          * Move our QP to the error state and then reinitialize in
 727          * when all work requests have completed or have been flushed.
 728          */
 729         qp_attr.qp_state = IB_QPS_ERR;
 730         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
 731                 ipoib_warn(priv, "Failed to modify QP to ERROR state\n");
 732
 733         /* Wait for all sends and receives to complete */
 734         begin = jiffies;
 735
 736         while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) {
 737                 if (time_after(jiffies, begin + 5 * HZ)) {
 738                         ipoib_warn(priv,
 739                                    "timing out; %d sends %d receives not completed\n",
 740                                    priv->tx_head - priv->tx_tail,
 741                                    recvs_pending(dev));
 742
 743                         /*
 744                          * assume the HW is wedged and just free up
 745                          * all our pending work requests.
 746                          */
 747                         while ((int)priv->tx_tail - (int)priv->tx_head < 0) {
 748                                 tx_req = &priv->tx_ring[priv->tx_tail &
 749                                                         (ipoib_sendq_size - 1)];
 750                                 ipoib_dma_unmap_tx(priv, tx_req);
 751                                 dev_kfree_skb_any(tx_req->skb);
 752                                 ++priv->tx_tail;
 753                                 --priv->tx_outstanding;
 754                         }
 755
 756                         for (i = 0; i < ipoib_recvq_size; ++i) {
 757                                 struct ipoib_rx_buf *rx_req;
 758
 759                                 rx_req = &priv->rx_ring[i];
 760                                 if (!rx_req->skb)
 761                                         continue;
 762                                 ipoib_ud_dma_unmap_rx(priv,
 763                                                       priv->rx_ring[i].mapping);
 764                                 dev_kfree_skb_any(rx_req->skb);
 765                                 rx_req->skb = NULL;
 766                         }
 767
 768                         goto timeout;
 769                 }
 770
 771                 ipoib_drain_cq(dev);
 772
 773                 usleep_range(1000, 2000);
 774         }
 775
 776         ipoib_dbg(priv, "All sends and receives done.\n");
 777
 778 timeout:
 779         del_timer_sync(&priv->poll_timer);
 780         qp_attr.qp_state = IB_QPS_RESET;
 781         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
 782                 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
 783
 784         ib_req_notify_cq(priv->recv_cq, IB_CQ_NEXT_COMP);
 785
 786         return 0;
 787 }
 788
 789 int ipoib_ib_dev_stop(struct net_device *dev)
 790 {
 791         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 792
 793         priv->rn_ops->ndo_stop(dev);
 794
 795         clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
 796         ipoib_flush_ah(dev);
 797
 798         return 0;
 799 }
 800
 801 void ipoib_ib_tx_timer_func(unsigned long ctx)
 802 {
 803         drain_tx_cq((struct net_device *)ctx);
 804 }
 805
 806 int ipoib_ib_dev_open_default(struct net_device *dev)
 807 {
 808         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 809         int ret;
 810
 811         ret = ipoib_init_qp(dev);
 812         if (ret) {
 813                 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
 814                 return -1;
 815         }
 816
 817         ret = ipoib_ib_post_receives(dev);
 818         if (ret) {
 819                 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
 820                 goto out;
 821         }
 822
 823         ret = ipoib_cm_dev_open(dev);
 824         if (ret) {
 825                 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret);
 826                 goto out;
 827         }
 828
 829         if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
 830                 napi_enable(&priv->napi);
 831
 832         return 0;
 833 out:
 834         return -1;
 835 }
 836
 837 int ipoib_ib_dev_open(struct net_device *dev)
 838 {
 839         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 840
 841         ipoib_pkey_dev_check_presence(dev);
 842
 843         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
 844                 ipoib_warn(priv, "P_Key 0x%04x is %s\n", priv->pkey,
 845                            (!(priv->pkey & 0x7fff) ? "Invalid" : "not found"));
 846                 return -1;
 847         }
 848
 849         clear_bit(IPOIB_STOP_REAPER, &priv->flags);
 850         queue_delayed_work(priv->wq, &priv->ah_reap_task,
 851                            round_jiffies_relative(HZ));
 852
 853         if (priv->rn_ops->ndo_open(dev)) {
 854                 pr_warn("%s: Failed to open dev\n", dev->name);
 855                 goto dev_stop;
 856         }
 857
 858         set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
 859
 860         return 0;
 861
 862 dev_stop:
 863         set_bit(IPOIB_STOP_REAPER, &priv->flags);
 864         cancel_delayed_work(&priv->ah_reap_task);
 865         set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
 866         ipoib_ib_dev_stop(dev);
 867         return -1;
 868 }
 869
 870 void ipoib_pkey_dev_check_presence(struct net_device *dev)
 871 {
 872         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 873
 874         if (!(priv->pkey & 0x7fff) ||
 875             ib_find_pkey(priv->ca, priv->port, priv->pkey,
 876                          &priv->pkey_index))
 877                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 878         else
 879                 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 880 }
 881
 882 void ipoib_ib_dev_up(struct net_device *dev)
 883 {
 884         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 885
 886         ipoib_pkey_dev_check_presence(dev);
 887
 888         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
 889                 ipoib_dbg(priv, "PKEY is not assigned.\n");
 890                 return;
 891         }
 892
 893         set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
 894
 895         ipoib_mcast_start_thread(dev);
 896 }
 897
 898 void ipoib_ib_dev_down(struct net_device *dev)
 899 {
 900         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 901
 902         ipoib_dbg(priv, "downing ib_dev\n");
 903
 904         clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
 905         netif_carrier_off(dev);
 906
 907         ipoib_mcast_stop_thread(dev);
 908         ipoib_mcast_dev_flush(dev);
 909
 910         ipoib_flush_paths(dev);
 911 }
 912
 913 void ipoib_drain_cq(struct net_device *dev)
 914 {
 915         struct ipoib_dev_priv *priv = ipoib_priv(dev);
 916         int i, n;
 917
 918         /*
 919          * We call completion handling routines that expect to be
 920          * called from the BH-disabled NAPI poll context, so disable
 921          * BHs here too.
 922          */
 923         local_bh_disable();
 924
 925         do {
 926                 n = ib_poll_cq(priv->recv_cq, IPOIB_NUM_WC, priv->ibwc);
 927                 for (i = 0; i < n; ++i) {
 928                         /*
 929                          * Convert any successful completions to flush
 930                          * errors to avoid passing packets up the
 931                          * stack after bringing the device down.
 932                          */
 933                         if (priv->ibwc[i].status == IB_WC_SUCCESS)
 934                                 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
 935
 936                         if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) {
 937                                 if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
 938                                         ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
 939                                 else
 940                                         ipoib_ib_handle_rx_wc(dev, priv->ibwc + i);
 941                         } else
 942                                 ipoib_cm_handle_tx_wc(dev, priv->ibwc + i);
 943                 }
 944         } while (n == IPOIB_NUM_WC);
 945
 946         while (poll_tx(priv))
 947                 ; /* nothing */
 948
 949         local_bh_enable();
 950 }
 951
 952 /*
 953  * Takes whatever value which is in pkey index 0 and updates priv->pkey
 954  * returns 0 if the pkey value was changed.
 955  */
 956 static inline int update_parent_pkey(struct ipoib_dev_priv *priv)
 957 {
 958         int result;
 959         u16 prev_pkey;
 960
 961         prev_pkey = priv->pkey;
 962         result = ib_query_pkey(priv->ca, priv->port, 0, &priv->pkey);
 963         if (result) {
 964                 ipoib_warn(priv, "ib_query_pkey port %d failed (ret = %d)\n",
 965                            priv->port, result);
 966                 return result;
 967         }
 968
 969         priv->pkey |= 0x8000;
 970
 971         if (prev_pkey != priv->pkey) {
 972                 ipoib_dbg(priv, "pkey changed from 0x%x to 0x%x\n",
 973                           prev_pkey, priv->pkey);
 974                 /*
 975                  * Update the pkey in the broadcast address, while making sure to set
 976                  * the full membership bit, so that we join the right broadcast group.
 977                  */
 978                 priv->dev->broadcast[8] = priv->pkey >> 8;
 979                 priv->dev->broadcast[9] = priv->pkey & 0xff;
 980
 981                 /*
 982                  * Update the broadcast address in the priv->broadcast object,
 983                  * in case it already exists, otherwise no one will do that.
 984                  */
 985                 if (priv->broadcast) {
 986                         spin_lock_irq(&priv->lock);
 987                         memcpy(priv->broadcast->mcmember.mgid.raw,
 988                                priv->dev->broadcast + 4,
 989                         sizeof(union ib_gid));
 990                         spin_unlock_irq(&priv->lock);
 991                 }
 992
 993                 return 0;
 994         }
 995
 996         return 1;
 997 }
 998 /*
 999  * returns 0 if pkey value was found in a different slot.
1000  */
1001 static inline int update_child_pkey(struct ipoib_dev_priv *priv)
1002 {
1003         u16 old_index = priv->pkey_index;
1004
1005         priv->pkey_index = 0;
1006         ipoib_pkey_dev_check_presence(priv->dev);
1007
1008         if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
1009             (old_index == priv->pkey_index))
1010                 return 1;
1011         return 0;
1012 }
1013
1014 /*
1015  * returns true if the device address of the ipoib interface has changed and the
1016  * new address is a valid one (i.e in the gid table), return false otherwise.
1017  */
1018 static bool ipoib_dev_addr_changed_valid(struct ipoib_dev_priv *priv)
1019 {
1020         union ib_gid search_gid;
1021         union ib_gid gid0;
1022         union ib_gid *netdev_gid;
1023         int err;
1024         u16 index;
1025         u8 port;
1026         bool ret = false;
1027
1028         netdev_gid = (union ib_gid *)(priv->dev->dev_addr + 4);
1029         if (ib_query_gid(priv->ca, priv->port, 0, &gid0, NULL))
1030                 return false;
1031
1032         netif_addr_lock_bh(priv->dev);
1033
1034         /* The subnet prefix may have changed, update it now so we won't have
1035          * to do it later
1036          */
1037         priv->local_gid.global.subnet_prefix = gid0.global.subnet_prefix;
1038         netdev_gid->global.subnet_prefix = gid0.global.subnet_prefix;
1039         search_gid.global.subnet_prefix = gid0.global.subnet_prefix;
1040
1041         search_gid.global.interface_id = priv->local_gid.global.interface_id;
1042
1043         netif_addr_unlock_bh(priv->dev);
1044
1045         err = ib_find_gid(priv->ca, &search_gid, IB_GID_TYPE_IB,
1046                           priv->dev, &port, &index);
1047
1048         netif_addr_lock_bh(priv->dev);
1049
1050         if (search_gid.global.interface_id !=
1051             priv->local_gid.global.interface_id)
1052                 /* There was a change while we were looking up the gid, bail
1053                  * here and let the next work sort this out
1054                  */
1055                 goto out;
1056
1057         /* The next section of code needs some background:
1058          * Per IB spec the port GUID can't change if the HCA is powered on.
1059          * port GUID is the basis for GID at index 0 which is the basis for
1060          * the default device address of a ipoib interface.
1061          *
1062          * so it seems the flow should be:
1063          * if user_changed_dev_addr && gid in gid tbl
1064          *      set bit dev_addr_set
1065          *      return true
1066          * else
1067          *      return false
1068          *
1069          * The issue is that there are devices that don't follow the spec,
1070          * they change the port GUID when the HCA is powered, so in order
1071          * not to break userspace applications, We need to check if the
1072          * user wanted to control the device address and we assume that
1073          * if he sets the device address back to be based on GID index 0,
1074          * he no longer wishs to control it.
1075          *
1076          * If the user doesn't control the the device address,
1077          * IPOIB_FLAG_DEV_ADDR_SET is set and ib_find_gid failed it means
1078          * the port GUID has changed and GID at index 0 has changed
1079          * so we need to change priv->local_gid and priv->dev->dev_addr
1080          * to reflect the new GID.
1081          */
1082         if (!test_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags)) {
1083                 if (!err && port == priv->port) {
1084                         set_bit(IPOIB_FLAG_DEV_ADDR_SET, &priv->flags);
1085                         if (index == 0)
1086                                 clear_bit(IPOIB_FLAG_DEV_ADDR_CTRL,
1087                                           &priv->flags);
1088                         else
1089                                 set_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags);
1090                         ret = true;
1091                 } else {
1092                         ret = false;
1093                 }
1094         } else {
1095                 if (!err && port == priv->port) {
1096                         ret = true;
1097                 } else {
1098                         if (!test_bit(IPOIB_FLAG_DEV_ADDR_CTRL, &priv->flags)) {
1099                                 memcpy(&priv->local_gid, &gid0,
1100                                        sizeof(priv->local_gid));
1101                                 memcpy(priv->dev->dev_addr + 4, &gid0,
1102                                        sizeof(priv->local_gid));
1103                                 ret = true;
1104                         }
1105                 }
1106         }
1107
1108 out:
1109         netif_addr_unlock_bh(priv->dev);
1110
1111         return ret;
1112 }
1113
1114 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
1115                                 enum ipoib_flush_level level,
1116                                 int nesting)
1117 {
1118         struct ipoib_dev_priv *cpriv;
1119         struct net_device *dev = priv->dev;
1120         int result;
1121
1122         down_read_nested(&priv->vlan_rwsem, nesting);
1123
1124         /*
1125          * Flush any child interfaces too -- they might be up even if
1126          * the parent is down.
1127          */
1128         list_for_each_entry(cpriv, &priv->child_intfs, list)
1129                 __ipoib_ib_dev_flush(cpriv, level, nesting + 1);
1130
1131         up_read(&priv->vlan_rwsem);
1132
1133         if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) &&
1134             level != IPOIB_FLUSH_HEAVY) {
1135                 /* Make sure the dev_addr is set even if not flushing */
1136                 if (level == IPOIB_FLUSH_LIGHT)
1137                         ipoib_dev_addr_changed_valid(priv);
1138                 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
1139                 return;
1140         }
1141
1142         if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
1143                 /* interface is down. update pkey and leave. */
1144                 if (level == IPOIB_FLUSH_HEAVY) {
1145                         if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags))
1146                                 update_parent_pkey(priv);
1147                         else
1148                                 update_child_pkey(priv);
1149                 } else if (level == IPOIB_FLUSH_LIGHT)
1150                         ipoib_dev_addr_changed_valid(priv);
1151                 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
1152                 return;
1153         }
1154
1155         if (level == IPOIB_FLUSH_HEAVY) {
1156                 /* child devices chase their origin pkey value, while non-child
1157                  * (parent) devices should always takes what present in pkey index 0
1158                  */
1159                 if (test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
1160                         result = update_child_pkey(priv);
1161                         if (result) {
1162                                 /* restart QP only if P_Key index is changed */
1163                                 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
1164                                 return;
1165                         }
1166
1167                 } else {
1168                         result = update_parent_pkey(priv);
1169                         /* restart QP only if P_Key value changed */
1170                         if (result) {
1171                                 ipoib_dbg(priv, "Not flushing - P_Key value not changed.\n");
1172                                 return;
1173                         }
1174                 }
1175         }
1176
1177         if (level == IPOIB_FLUSH_LIGHT) {
1178                 int oper_up;
1179                 ipoib_mark_paths_invalid(dev);
1180                 /* Set IPoIB operation as down to prevent races between:
1181                  * the flush flow which leaves MCG and on the fly joins
1182                  * which can happen during that time. mcast restart task
1183                  * should deal with join requests we missed.
1184                  */
1185                 oper_up = test_and_clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
1186                 ipoib_mcast_dev_flush(dev);
1187                 if (oper_up)
1188                         set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
1189                 ipoib_flush_ah(dev);
1190         }
1191
1192         if (level >= IPOIB_FLUSH_NORMAL)
1193                 ipoib_ib_dev_down(dev);
1194
1195         if (level == IPOIB_FLUSH_HEAVY) {
1196                 if (test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags))
1197                         ipoib_ib_dev_stop(dev);
1198                 if (ipoib_ib_dev_open(dev) != 0)
1199                         return;
1200                 if (netif_queue_stopped(dev))
1201                         netif_start_queue(dev);
1202         }
1203
1204         /*
1205          * The device could have been brought down between the start and when
1206          * we get here, don't bring it back up if it's not configured up
1207          */
1208         if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
1209                 if (level >= IPOIB_FLUSH_NORMAL)
1210                         ipoib_ib_dev_up(dev);
1211                 if (ipoib_dev_addr_changed_valid(priv))
1212                         ipoib_mcast_restart_task(&priv->restart_task);
1213         }
1214 }
1215
1216 void ipoib_ib_dev_flush_light(struct work_struct *work)
1217 {
1218         struct ipoib_dev_priv *priv =
1219                 container_of(work, struct ipoib_dev_priv, flush_light);
1220
1221         __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_LIGHT, 0);
1222 }
1223
1224 void ipoib_ib_dev_flush_normal(struct work_struct *work)
1225 {
1226         struct ipoib_dev_priv *priv =
1227                 container_of(work, struct ipoib_dev_priv, flush_normal);
1228
1229         __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_NORMAL, 0);
1230 }
1231
1232 void ipoib_ib_dev_flush_heavy(struct work_struct *work)
1233 {
1234         struct ipoib_dev_priv *priv =
1235                 container_of(work, struct ipoib_dev_priv, flush_heavy);
1236
1237         __ipoib_ib_dev_flush(priv, IPOIB_FLUSH_HEAVY, 0);
1238 }
1239
1240 void ipoib_ib_dev_cleanup(struct net_device *dev)
1241 {
1242         struct ipoib_dev_priv *priv = ipoib_priv(dev);
1243
1244         ipoib_dbg(priv, "cleaning up ib_dev\n");
1245         /*
1246          * We must make sure there are no more (path) completions
1247          * that may wish to touch priv fields that are no longer valid
1248          */
1249         ipoib_flush_paths(dev);
1250
1251         ipoib_mcast_stop_thread(dev);
1252         ipoib_mcast_dev_flush(dev);
1253
1254         /*
1255          * All of our ah references aren't free until after
1256          * ipoib_mcast_dev_flush(), ipoib_flush_paths, and
1257          * the neighbor garbage collection is stopped and reaped.
1258          * That should all be done now, so make a final ah flush.
1259          */
1260         ipoib_stop_ah(dev);
1261
1262         clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
1263
1264         priv->rn_ops->ndo_uninit(dev);
1265
1266         if (priv->pd) {
1267                 ib_dealloc_pd(priv->pd);
1268                 priv->pd = NULL;
1269         }
1270 }
1271