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  * $Id: ipoib_ib.c 1386 2004-12-27 16:23:17Z roland $
  36  */
  37
  38 #include <linux/delay.h>
  39 #include <linux/dma-mapping.h>
  40
  41 #include <rdma/ib_cache.h>
  42
  43 #include "ipoib.h"
  44
  45 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
  46 static int data_debug_level;
  47
  48 module_param(data_debug_level, int, 0644);
  49 MODULE_PARM_DESC(data_debug_level,
  50                  "Enable data path debug tracing if > 0");
  51 #endif
  52
  53 #define IPOIB_OP_RECV   (1ul << 31)
  54
  55 static DEFINE_MUTEX(pkey_mutex);
  56
  57 struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
  58                                  struct ib_pd *pd, struct ib_ah_attr *attr)
  59 {
  60         struct ipoib_ah *ah;
  61
  62         ah = kmalloc(sizeof *ah, GFP_KERNEL);
  63         if (!ah)
  64                 return NULL;
  65
  66         ah->dev       = dev;
  67         ah->last_send = 0;
  68         kref_init(&ah->ref);
  69
  70         ah->ah = ib_create_ah(pd, attr);
  71         if (IS_ERR(ah->ah)) {
  72                 kfree(ah);
  73                 ah = NULL;
  74         } else
  75                 ipoib_dbg(netdev_priv(dev), "Created ah %p\n", ah->ah);
  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 int ipoib_ib_post_receive(struct net_device *dev, int id)
  93 {
  94         struct ipoib_dev_priv *priv = netdev_priv(dev);
  95         struct ib_sge list;
  96         struct ib_recv_wr param;
  97         struct ib_recv_wr *bad_wr;
  98         int ret;
  99
 100         list.addr     = priv->rx_ring[id].mapping;
 101         list.length   = IPOIB_BUF_SIZE;
 102         list.lkey     = priv->mr->lkey;
 103
 104         param.next    = NULL;
 105         param.wr_id   = id | IPOIB_OP_RECV;
 106         param.sg_list = &list;
 107         param.num_sge = 1;
 108
 109         ret = ib_post_recv(priv->qp, &param, &bad_wr);
 110         if (unlikely(ret)) {
 111                 ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret);
 112                 ib_dma_unmap_single(priv->ca, priv->rx_ring[id].mapping,
 113                                     IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
 114                 dev_kfree_skb_any(priv->rx_ring[id].skb);
 115                 priv->rx_ring[id].skb = NULL;
 116         }
 117
 118         return ret;
 119 }
 120
 121 static int ipoib_alloc_rx_skb(struct net_device *dev, int id)
 122 {
 123         struct ipoib_dev_priv *priv = netdev_priv(dev);
 124         struct sk_buff *skb;
 125         u64 addr;
 126
 127         skb = dev_alloc_skb(IPOIB_BUF_SIZE + 4);
 128         if (!skb)
 129                 return -ENOMEM;
 130
 131         /*
 132          * IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte
 133          * header.  So we need 4 more bytes to get to 48 and align the
 134          * IP header to a multiple of 16.
 135          */
 136         skb_reserve(skb, 4);
 137
 138         addr = ib_dma_map_single(priv->ca, skb->data, IPOIB_BUF_SIZE,
 139                                  DMA_FROM_DEVICE);
 140         if (unlikely(ib_dma_mapping_error(priv->ca, addr))) {
 141                 dev_kfree_skb_any(skb);
 142                 return -EIO;
 143         }
 144
 145         priv->rx_ring[id].skb     = skb;
 146         priv->rx_ring[id].mapping = addr;
 147
 148         return 0;
 149 }
 150
 151 static int ipoib_ib_post_receives(struct net_device *dev)
 152 {
 153         struct ipoib_dev_priv *priv = netdev_priv(dev);
 154         int i;
 155
 156         for (i = 0; i < ipoib_recvq_size; ++i) {
 157                 if (ipoib_alloc_rx_skb(dev, i)) {
 158                         ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
 159                         return -ENOMEM;
 160                 }
 161                 if (ipoib_ib_post_receive(dev, i)) {
 162                         ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i);
 163                         return -EIO;
 164                 }
 165         }
 166
 167         return 0;
 168 }
 169
 170 static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
 171 {
 172         struct ipoib_dev_priv *priv = netdev_priv(dev);
 173         unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV;
 174         struct sk_buff *skb;
 175         u64 addr;
 176
 177         ipoib_dbg_data(priv, "recv completion: id %d, op %d, status: %d\n",
 178                        wr_id, wc->opcode, wc->status);
 179
 180         if (unlikely(wr_id >= ipoib_recvq_size)) {
 181                 ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n",
 182                            wr_id, ipoib_recvq_size);
 183                 return;
 184         }
 185
 186         skb  = priv->rx_ring[wr_id].skb;
 187         addr = priv->rx_ring[wr_id].mapping;
 188
 189         if (unlikely(wc->status != IB_WC_SUCCESS)) {
 190                 if (wc->status != IB_WC_WR_FLUSH_ERR)
 191                         ipoib_warn(priv, "failed recv event "
 192                                    "(status=%d, wrid=%d vend_err %x)\n",
 193                                    wc->status, wr_id, wc->vendor_err);
 194                 ib_dma_unmap_single(priv->ca, addr,
 195                                     IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
 196                 dev_kfree_skb_any(skb);
 197                 priv->rx_ring[wr_id].skb = NULL;
 198                 return;
 199         }
 200
 201         /*
 202          * If we can't allocate a new RX buffer, dump
 203          * this packet and reuse the old buffer.
 204          */
 205         if (unlikely(ipoib_alloc_rx_skb(dev, wr_id))) {
 206                 ++priv->stats.rx_dropped;
 207                 goto repost;
 208         }
 209
 210         ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
 211                        wc->byte_len, wc->slid);
 212
 213         ib_dma_unmap_single(priv->ca, addr, IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
 214
 215         skb_put(skb, wc->byte_len);
 216         skb_pull(skb, IB_GRH_BYTES);
 217
 218         if (wc->slid != priv->local_lid ||
 219             wc->src_qp != priv->qp->qp_num) {
 220                 skb->protocol = ((struct ipoib_header *) skb->data)->proto;
 221                 skb->mac.raw = skb->data;
 222                 skb_pull(skb, IPOIB_ENCAP_LEN);
 223
 224                 dev->last_rx = jiffies;
 225                 ++priv->stats.rx_packets;
 226                 priv->stats.rx_bytes += skb->len;
 227
 228                 skb->dev = dev;
 229                 /* XXX get correct PACKET_ type here */
 230                 skb->pkt_type = PACKET_HOST;
 231                 netif_rx_ni(skb);
 232         } else {
 233                 ipoib_dbg_data(priv, "dropping loopback packet\n");
 234                 dev_kfree_skb_any(skb);
 235         }
 236
 237 repost:
 238         if (unlikely(ipoib_ib_post_receive(dev, wr_id)))
 239                 ipoib_warn(priv, "ipoib_ib_post_receive failed "
 240                            "for buf %d\n", wr_id);
 241 }
 242
 243 static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
 244 {
 245         struct ipoib_dev_priv *priv = netdev_priv(dev);
 246         unsigned int wr_id = wc->wr_id;
 247         struct ipoib_tx_buf *tx_req;
 248         unsigned long flags;
 249
 250         ipoib_dbg_data(priv, "send completion: id %d, op %d, status: %d\n",
 251                        wr_id, wc->opcode, wc->status);
 252
 253         if (unlikely(wr_id >= ipoib_sendq_size)) {
 254                 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n",
 255                            wr_id, ipoib_sendq_size);
 256                 return;
 257         }
 258
 259         tx_req = &priv->tx_ring[wr_id];
 260
 261         ib_dma_unmap_single(priv->ca, tx_req->mapping,
 262                             tx_req->skb->len, DMA_TO_DEVICE);
 263
 264         ++priv->stats.tx_packets;
 265         priv->stats.tx_bytes += tx_req->skb->len;
 266
 267         dev_kfree_skb_any(tx_req->skb);
 268
 269         spin_lock_irqsave(&priv->tx_lock, flags);
 270         ++priv->tx_tail;
 271         if (netif_queue_stopped(dev) &&
 272             test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags) &&
 273             priv->tx_head - priv->tx_tail <= ipoib_sendq_size >> 1)
 274                 netif_wake_queue(dev);
 275         spin_unlock_irqrestore(&priv->tx_lock, flags);
 276
 277         if (wc->status != IB_WC_SUCCESS &&
 278             wc->status != IB_WC_WR_FLUSH_ERR)
 279                 ipoib_warn(priv, "failed send event "
 280                            "(status=%d, wrid=%d vend_err %x)\n",
 281                            wc->status, wr_id, wc->vendor_err);
 282 }
 283
 284 static void ipoib_ib_handle_wc(struct net_device *dev, struct ib_wc *wc)
 285 {
 286         if (wc->wr_id & IPOIB_OP_RECV)
 287                 ipoib_ib_handle_rx_wc(dev, wc);
 288         else
 289                 ipoib_ib_handle_tx_wc(dev, wc);
 290 }
 291
 292 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
 293 {
 294         struct net_device *dev = (struct net_device *) dev_ptr;
 295         struct ipoib_dev_priv *priv = netdev_priv(dev);
 296         int n, i;
 297
 298         ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
 299         do {
 300                 n = ib_poll_cq(cq, IPOIB_NUM_WC, priv->ibwc);
 301                 for (i = 0; i < n; ++i)
 302                         ipoib_ib_handle_wc(dev, priv->ibwc + i);
 303         } while (n == IPOIB_NUM_WC);
 304 }
 305
 306 static inline int post_send(struct ipoib_dev_priv *priv,
 307                             unsigned int wr_id,
 308                             struct ib_ah *address, u32 qpn,
 309                             u64 addr, int len)
 310 {
 311         struct ib_send_wr *bad_wr;
 312
 313         priv->tx_sge.addr             = addr;
 314         priv->tx_sge.length           = len;
 315
 316         priv->tx_wr.wr_id             = wr_id;
 317         priv->tx_wr.wr.ud.remote_qpn  = qpn;
 318         priv->tx_wr.wr.ud.ah          = address;
 319
 320         return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr);
 321 }
 322
 323 void ipoib_send(struct net_device *dev, struct sk_buff *skb,
 324                 struct ipoib_ah *address, u32 qpn)
 325 {
 326         struct ipoib_dev_priv *priv = netdev_priv(dev);
 327         struct ipoib_tx_buf *tx_req;
 328         u64 addr;
 329
 330         if (unlikely(skb->len > dev->mtu + INFINIBAND_ALEN)) {
 331                 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
 332                            skb->len, dev->mtu + INFINIBAND_ALEN);
 333                 ++priv->stats.tx_dropped;
 334                 ++priv->stats.tx_errors;
 335                 dev_kfree_skb_any(skb);
 336                 return;
 337         }
 338
 339         ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n",
 340                        skb->len, address, qpn);
 341
 342         /*
 343          * We put the skb into the tx_ring _before_ we call post_send()
 344          * because it's entirely possible that the completion handler will
 345          * run before we execute anything after the post_send().  That
 346          * means we have to make sure everything is properly recorded and
 347          * our state is consistent before we call post_send().
 348          */
 349         tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
 350         tx_req->skb = skb;
 351         addr = ib_dma_map_single(priv->ca, skb->data, skb->len,
 352                                  DMA_TO_DEVICE);
 353         if (unlikely(ib_dma_mapping_error(priv->ca, addr))) {
 354                 ++priv->stats.tx_errors;
 355                 dev_kfree_skb_any(skb);
 356                 return;
 357         }
 358         tx_req->mapping = addr;
 359
 360         if (unlikely(post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),
 361                                address->ah, qpn, addr, skb->len))) {
 362                 ipoib_warn(priv, "post_send failed\n");
 363                 ++priv->stats.tx_errors;
 364                 ib_dma_unmap_single(priv->ca, addr, skb->len, DMA_TO_DEVICE);
 365                 dev_kfree_skb_any(skb);
 366         } else {
 367                 dev->trans_start = jiffies;
 368
 369                 address->last_send = priv->tx_head;
 370                 ++priv->tx_head;
 371
 372                 if (priv->tx_head - priv->tx_tail == ipoib_sendq_size) {
 373                         ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
 374                         netif_stop_queue(dev);
 375                 }
 376         }
 377 }
 378
 379 static void __ipoib_reap_ah(struct net_device *dev)
 380 {
 381         struct ipoib_dev_priv *priv = netdev_priv(dev);
 382         struct ipoib_ah *ah, *tah;
 383         LIST_HEAD(remove_list);
 384
 385         spin_lock_irq(&priv->tx_lock);
 386         spin_lock(&priv->lock);
 387         list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
 388                 if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
 389                         list_del(&ah->list);
 390                         ib_destroy_ah(ah->ah);
 391                         kfree(ah);
 392                 }
 393         spin_unlock(&priv->lock);
 394         spin_unlock_irq(&priv->tx_lock);
 395 }
 396
 397 void ipoib_reap_ah(struct work_struct *work)
 398 {
 399         struct ipoib_dev_priv *priv =
 400                 container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
 401         struct net_device *dev = priv->dev;
 402
 403         __ipoib_reap_ah(dev);
 404
 405         if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
 406                 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
 407 }
 408
 409 int ipoib_ib_dev_open(struct net_device *dev)
 410 {
 411         struct ipoib_dev_priv *priv = netdev_priv(dev);
 412         int ret;
 413
 414         ret = ipoib_init_qp(dev);
 415         if (ret) {
 416                 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
 417                 return -1;
 418         }
 419
 420         ret = ipoib_ib_post_receives(dev);
 421         if (ret) {
 422                 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
 423                 ipoib_ib_dev_stop(dev);
 424                 return -1;
 425         }
 426
 427         clear_bit(IPOIB_STOP_REAPER, &priv->flags);
 428         queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
 429
 430         set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
 431
 432         return 0;
 433 }
 434
 435 static void ipoib_pkey_dev_check_presence(struct net_device *dev)
 436 {
 437         struct ipoib_dev_priv *priv = netdev_priv(dev);
 438         u16 pkey_index = 0;
 439
 440         if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
 441                 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 442         else
 443                 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
 444 }
 445
 446 int ipoib_ib_dev_up(struct net_device *dev)
 447 {
 448         struct ipoib_dev_priv *priv = netdev_priv(dev);
 449
 450         ipoib_pkey_dev_check_presence(dev);
 451
 452         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
 453                 ipoib_dbg(priv, "PKEY is not assigned.\n");
 454                 return 0;
 455         }
 456
 457         set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
 458
 459         return ipoib_mcast_start_thread(dev);
 460 }
 461
 462 int ipoib_ib_dev_down(struct net_device *dev, int flush)
 463 {
 464         struct ipoib_dev_priv *priv = netdev_priv(dev);
 465
 466         ipoib_dbg(priv, "downing ib_dev\n");
 467
 468         clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
 469         netif_carrier_off(dev);
 470
 471         /* Shutdown the P_Key thread if still active */
 472         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
 473                 mutex_lock(&pkey_mutex);
 474                 set_bit(IPOIB_PKEY_STOP, &priv->flags);
 475                 cancel_delayed_work(&priv->pkey_task);
 476                 mutex_unlock(&pkey_mutex);
 477                 if (flush)
 478                         flush_workqueue(ipoib_workqueue);
 479         }
 480
 481         ipoib_mcast_stop_thread(dev, flush);
 482         ipoib_mcast_dev_flush(dev);
 483
 484         ipoib_flush_paths(dev);
 485
 486         return 0;
 487 }
 488
 489 static int recvs_pending(struct net_device *dev)
 490 {
 491         struct ipoib_dev_priv *priv = netdev_priv(dev);
 492         int pending = 0;
 493         int i;
 494
 495         for (i = 0; i < ipoib_recvq_size; ++i)
 496                 if (priv->rx_ring[i].skb)
 497                         ++pending;
 498
 499         return pending;
 500 }
 501
 502 int ipoib_ib_dev_stop(struct net_device *dev)
 503 {
 504         struct ipoib_dev_priv *priv = netdev_priv(dev);
 505         struct ib_qp_attr qp_attr;
 506         unsigned long begin;
 507         struct ipoib_tx_buf *tx_req;
 508         int i;
 509
 510         clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
 511
 512         /*
 513          * Move our QP to the error state and then reinitialize in
 514          * when all work requests have completed or have been flushed.
 515          */
 516         qp_attr.qp_state = IB_QPS_ERR;
 517         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
 518                 ipoib_warn(priv, "Failed to modify QP to ERROR state\n");
 519
 520         /* Wait for all sends and receives to complete */
 521         begin = jiffies;
 522
 523         while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) {
 524                 if (time_after(jiffies, begin + 5 * HZ)) {
 525                         ipoib_warn(priv, "timing out; %d sends %d receives not completed\n",
 526                                    priv->tx_head - priv->tx_tail, recvs_pending(dev));
 527
 528                         /*
 529                          * assume the HW is wedged and just free up
 530                          * all our pending work requests.
 531                          */
 532                         while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
 533                                 tx_req = &priv->tx_ring[priv->tx_tail &
 534                                                         (ipoib_sendq_size - 1)];
 535                                 ib_dma_unmap_single(priv->ca,
 536                                                     tx_req->mapping,
 537                                                     tx_req->skb->len,
 538                                                     DMA_TO_DEVICE);
 539                                 dev_kfree_skb_any(tx_req->skb);
 540                                 ++priv->tx_tail;
 541                         }
 542
 543                         for (i = 0; i < ipoib_recvq_size; ++i) {
 544                                 struct ipoib_rx_buf *rx_req;
 545
 546                                 rx_req = &priv->rx_ring[i];
 547                                 if (!rx_req->skb)
 548                                         continue;
 549                                 ib_dma_unmap_single(priv->ca,
 550                                                     rx_req->mapping,
 551                                                     IPOIB_BUF_SIZE,
 552                                                     DMA_FROM_DEVICE);
 553                                 dev_kfree_skb_any(rx_req->skb);
 554                                 rx_req->skb = NULL;
 555                         }
 556
 557                         goto timeout;
 558                 }
 559
 560                 msleep(1);
 561         }
 562
 563         ipoib_dbg(priv, "All sends and receives done.\n");
 564
 565 timeout:
 566         qp_attr.qp_state = IB_QPS_RESET;
 567         if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
 568                 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
 569
 570         /* Wait for all AHs to be reaped */
 571         set_bit(IPOIB_STOP_REAPER, &priv->flags);
 572         cancel_delayed_work(&priv->ah_reap_task);
 573         flush_workqueue(ipoib_workqueue);
 574
 575         begin = jiffies;
 576
 577         while (!list_empty(&priv->dead_ahs)) {
 578                 __ipoib_reap_ah(dev);
 579
 580                 if (time_after(jiffies, begin + HZ)) {
 581                         ipoib_warn(priv, "timing out; will leak address handles\n");
 582                         break;
 583                 }
 584
 585                 msleep(1);
 586         }
 587
 588         return 0;
 589 }
 590
 591 int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
 592 {
 593         struct ipoib_dev_priv *priv = netdev_priv(dev);
 594
 595         priv->ca = ca;
 596         priv->port = port;
 597         priv->qp = NULL;
 598
 599         if (ipoib_transport_dev_init(dev, ca)) {
 600                 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name);
 601                 return -ENODEV;
 602         }
 603
 604         if (dev->flags & IFF_UP) {
 605                 if (ipoib_ib_dev_open(dev)) {
 606                         ipoib_transport_dev_cleanup(dev);
 607                         return -ENODEV;
 608                 }
 609         }
 610
 611         return 0;
 612 }
 613
 614 void ipoib_ib_dev_flush(struct work_struct *work)
 615 {
 616         struct ipoib_dev_priv *cpriv, *priv =
 617                 container_of(work, struct ipoib_dev_priv, flush_task);
 618         struct net_device *dev = priv->dev;
 619
 620         if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags) ) {
 621                 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
 622                 return;
 623         }
 624
 625         if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
 626                 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
 627                 return;
 628         }
 629
 630         ipoib_dbg(priv, "flushing\n");
 631
 632         ipoib_ib_dev_down(dev, 0);
 633
 634         /*
 635          * The device could have been brought down between the start and when
 636          * we get here, don't bring it back up if it's not configured up
 637          */
 638         if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
 639                 ipoib_ib_dev_up(dev);
 640                 ipoib_mcast_restart_task(&priv->restart_task);
 641         }
 642
 643         mutex_lock(&priv->vlan_mutex);
 644
 645         /* Flush any child interfaces too */
 646         list_for_each_entry(cpriv, &priv->child_intfs, list)
 647                 ipoib_ib_dev_flush(&cpriv->flush_task);
 648
 649         mutex_unlock(&priv->vlan_mutex);
 650 }
 651
 652 void ipoib_ib_dev_cleanup(struct net_device *dev)
 653 {
 654         struct ipoib_dev_priv *priv = netdev_priv(dev);
 655
 656         ipoib_dbg(priv, "cleaning up ib_dev\n");
 657
 658         ipoib_mcast_stop_thread(dev, 1);
 659         ipoib_mcast_dev_flush(dev);
 660
 661         ipoib_transport_dev_cleanup(dev);
 662 }
 663
 664 /*
 665  * Delayed P_Key Assigment Interim Support
 666  *
 667  * The following is initial implementation of delayed P_Key assigment
 668  * mechanism. It is using the same approach implemented for the multicast
 669  * group join. The single goal of this implementation is to quickly address
 670  * Bug #2507. This implementation will probably be removed when the P_Key
 671  * change async notification is available.
 672  */
 673
 674 void ipoib_pkey_poll(struct work_struct *work)
 675 {
 676         struct ipoib_dev_priv *priv =
 677                 container_of(work, struct ipoib_dev_priv, pkey_task.work);
 678         struct net_device *dev = priv->dev;
 679
 680         ipoib_pkey_dev_check_presence(dev);
 681
 682         if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
 683                 ipoib_open(dev);
 684         else {
 685                 mutex_lock(&pkey_mutex);
 686                 if (!test_bit(IPOIB_PKEY_STOP, &priv->flags))
 687                         queue_delayed_work(ipoib_workqueue,
 688                                            &priv->pkey_task,
 689                                            HZ);
 690                 mutex_unlock(&pkey_mutex);
 691         }
 692 }
 693
 694 int ipoib_pkey_dev_delay_open(struct net_device *dev)
 695 {
 696         struct ipoib_dev_priv *priv = netdev_priv(dev);
 697
 698         /* Look for the interface pkey value in the IB Port P_Key table and */
 699         /* set the interface pkey assigment flag                            */
 700         ipoib_pkey_dev_check_presence(dev);
 701
 702         /* P_Key value not assigned yet - start polling */
 703         if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
 704                 mutex_lock(&pkey_mutex);
 705                 clear_bit(IPOIB_PKEY_STOP, &priv->flags);
 706                 queue_delayed_work(ipoib_workqueue,
 707                                    &priv->pkey_task,
 708                                    HZ);
 709                 mutex_unlock(&pkey_mutex);
 710                 return 1;
 711         }
 712
 713         return 0;
 714 }