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