ipoib_ib.c revision 54d07e2a1ead2f093ce054cda2e0f5ec163c650c
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 46static int data_debug_level; 47 48module_param(data_debug_level, int, 0644); 49MODULE_PARM_DESC(data_debug_level, 50 "Enable data path debug tracing if > 0"); 51#endif 52 53#define IPOIB_OP_RECV (1ul << 31) 54 55static DEFINE_MUTEX(pkey_mutex); 56 57struct 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 80void 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 98static 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, ¶m, &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 128static 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 159static 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_RX_RING_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 178static 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_RX_RING_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_TX_RING_SIZE) { 256 ipoib_warn(priv, "completion event with wrid %d (> %d)\n", 257 wr_id, IPOIB_TX_RING_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 priv->tx_head - priv->tx_tail <= IPOIB_TX_RING_SIZE / 2) 279 netif_wake_queue(dev); 280 spin_unlock_irqrestore(&priv->tx_lock, flags); 281 282 if (wc->status != IB_WC_SUCCESS && 283 wc->status != IB_WC_WR_FLUSH_ERR) 284 ipoib_warn(priv, "failed send event " 285 "(status=%d, wrid=%d vend_err %x)\n", 286 wc->status, wr_id, wc->vendor_err); 287 } 288} 289 290void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) 291{ 292 struct net_device *dev = (struct net_device *) dev_ptr; 293 struct ipoib_dev_priv *priv = netdev_priv(dev); 294 int n, i; 295 296 ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); 297 do { 298 n = ib_poll_cq(cq, IPOIB_NUM_WC, priv->ibwc); 299 for (i = 0; i < n; ++i) 300 ipoib_ib_handle_wc(dev, priv->ibwc + i); 301 } while (n == IPOIB_NUM_WC); 302} 303 304static inline int post_send(struct ipoib_dev_priv *priv, 305 unsigned int wr_id, 306 struct ib_ah *address, u32 qpn, 307 dma_addr_t addr, int len) 308{ 309 struct ib_send_wr *bad_wr; 310 311 priv->tx_sge.addr = addr; 312 priv->tx_sge.length = len; 313 314 priv->tx_wr.wr_id = wr_id; 315 priv->tx_wr.wr.ud.remote_qpn = qpn; 316 priv->tx_wr.wr.ud.ah = address; 317 318 return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr); 319} 320 321void ipoib_send(struct net_device *dev, struct sk_buff *skb, 322 struct ipoib_ah *address, u32 qpn) 323{ 324 struct ipoib_dev_priv *priv = netdev_priv(dev); 325 struct ipoib_tx_buf *tx_req; 326 dma_addr_t addr; 327 328 if (skb->len > dev->mtu + INFINIBAND_ALEN) { 329 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", 330 skb->len, dev->mtu + INFINIBAND_ALEN); 331 ++priv->stats.tx_dropped; 332 ++priv->stats.tx_errors; 333 dev_kfree_skb_any(skb); 334 return; 335 } 336 337 ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n", 338 skb->len, address, qpn); 339 340 /* 341 * We put the skb into the tx_ring _before_ we call post_send() 342 * because it's entirely possible that the completion handler will 343 * run before we execute anything after the post_send(). That 344 * means we have to make sure everything is properly recorded and 345 * our state is consistent before we call post_send(). 346 */ 347 tx_req = &priv->tx_ring[priv->tx_head & (IPOIB_TX_RING_SIZE - 1)]; 348 tx_req->skb = skb; 349 addr = dma_map_single(priv->ca->dma_device, skb->data, skb->len, 350 DMA_TO_DEVICE); 351 pci_unmap_addr_set(tx_req, mapping, addr); 352 353 if (unlikely(post_send(priv, priv->tx_head & (IPOIB_TX_RING_SIZE - 1), 354 address->ah, qpn, addr, skb->len))) { 355 ipoib_warn(priv, "post_send failed\n"); 356 ++priv->stats.tx_errors; 357 dma_unmap_single(priv->ca->dma_device, addr, skb->len, 358 DMA_TO_DEVICE); 359 dev_kfree_skb_any(skb); 360 } else { 361 dev->trans_start = jiffies; 362 363 address->last_send = priv->tx_head; 364 ++priv->tx_head; 365 366 if (priv->tx_head - priv->tx_tail == IPOIB_TX_RING_SIZE) { 367 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); 368 netif_stop_queue(dev); 369 } 370 } 371} 372 373static void __ipoib_reap_ah(struct net_device *dev) 374{ 375 struct ipoib_dev_priv *priv = netdev_priv(dev); 376 struct ipoib_ah *ah, *tah; 377 LIST_HEAD(remove_list); 378 379 spin_lock_irq(&priv->lock); 380 list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) 381 if ((int) priv->tx_tail - (int) ah->last_send >= 0) { 382 list_del(&ah->list); 383 list_add_tail(&ah->list, &remove_list); 384 } 385 spin_unlock_irq(&priv->lock); 386 387 list_for_each_entry_safe(ah, tah, &remove_list, list) { 388 ipoib_dbg(priv, "Reaping ah %p\n", ah->ah); 389 ib_destroy_ah(ah->ah); 390 kfree(ah); 391 } 392} 393 394void ipoib_reap_ah(void *dev_ptr) 395{ 396 struct net_device *dev = dev_ptr; 397 struct ipoib_dev_priv *priv = netdev_priv(dev); 398 399 __ipoib_reap_ah(dev); 400 401 if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) 402 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ); 403} 404 405int ipoib_ib_dev_open(struct net_device *dev) 406{ 407 struct ipoib_dev_priv *priv = netdev_priv(dev); 408 int ret; 409 410 ret = ipoib_init_qp(dev); 411 if (ret) { 412 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret); 413 return -1; 414 } 415 416 ret = ipoib_ib_post_receives(dev); 417 if (ret) { 418 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); 419 ipoib_ib_dev_stop(dev); 420 return -1; 421 } 422 423 clear_bit(IPOIB_STOP_REAPER, &priv->flags); 424 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ); 425 426 return 0; 427} 428 429int ipoib_ib_dev_up(struct net_device *dev) 430{ 431 struct ipoib_dev_priv *priv = netdev_priv(dev); 432 433 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 434 435 return ipoib_mcast_start_thread(dev); 436} 437 438int ipoib_ib_dev_down(struct net_device *dev) 439{ 440 struct ipoib_dev_priv *priv = netdev_priv(dev); 441 442 ipoib_dbg(priv, "downing ib_dev\n"); 443 444 clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); 445 netif_carrier_off(dev); 446 447 /* Shutdown the P_Key thread if still active */ 448 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 449 mutex_lock(&pkey_mutex); 450 set_bit(IPOIB_PKEY_STOP, &priv->flags); 451 cancel_delayed_work(&priv->pkey_task); 452 mutex_unlock(&pkey_mutex); 453 flush_workqueue(ipoib_workqueue); 454 } 455 456 ipoib_mcast_stop_thread(dev, 1); 457 ipoib_mcast_dev_flush(dev); 458 459 ipoib_flush_paths(dev); 460 461 return 0; 462} 463 464static int recvs_pending(struct net_device *dev) 465{ 466 struct ipoib_dev_priv *priv = netdev_priv(dev); 467 int pending = 0; 468 int i; 469 470 for (i = 0; i < IPOIB_RX_RING_SIZE; ++i) 471 if (priv->rx_ring[i].skb) 472 ++pending; 473 474 return pending; 475} 476 477int ipoib_ib_dev_stop(struct net_device *dev) 478{ 479 struct ipoib_dev_priv *priv = netdev_priv(dev); 480 struct ib_qp_attr qp_attr; 481 unsigned long begin; 482 struct ipoib_tx_buf *tx_req; 483 int i; 484 485 /* 486 * Move our QP to the error state and then reinitialize in 487 * when all work requests have completed or have been flushed. 488 */ 489 qp_attr.qp_state = IB_QPS_ERR; 490 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 491 ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); 492 493 /* Wait for all sends and receives to complete */ 494 begin = jiffies; 495 496 while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { 497 if (time_after(jiffies, begin + 5 * HZ)) { 498 ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", 499 priv->tx_head - priv->tx_tail, recvs_pending(dev)); 500 501 /* 502 * assume the HW is wedged and just free up 503 * all our pending work requests. 504 */ 505 while ((int) priv->tx_tail - (int) priv->tx_head < 0) { 506 tx_req = &priv->tx_ring[priv->tx_tail & 507 (IPOIB_TX_RING_SIZE - 1)]; 508 dma_unmap_single(priv->ca->dma_device, 509 pci_unmap_addr(tx_req, mapping), 510 tx_req->skb->len, 511 DMA_TO_DEVICE); 512 dev_kfree_skb_any(tx_req->skb); 513 ++priv->tx_tail; 514 } 515 516 for (i = 0; i < IPOIB_RX_RING_SIZE; ++i) 517 if (priv->rx_ring[i].skb) { 518 dma_unmap_single(priv->ca->dma_device, 519 pci_unmap_addr(&priv->rx_ring[i], 520 mapping), 521 IPOIB_BUF_SIZE, 522 DMA_FROM_DEVICE); 523 dev_kfree_skb_any(priv->rx_ring[i].skb); 524 priv->rx_ring[i].skb = NULL; 525 } 526 527 goto timeout; 528 } 529 530 msleep(1); 531 } 532 533 ipoib_dbg(priv, "All sends and receives done.\n"); 534 535timeout: 536 qp_attr.qp_state = IB_QPS_RESET; 537 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE)) 538 ipoib_warn(priv, "Failed to modify QP to RESET state\n"); 539 540 /* Wait for all AHs to be reaped */ 541 set_bit(IPOIB_STOP_REAPER, &priv->flags); 542 cancel_delayed_work(&priv->ah_reap_task); 543 flush_workqueue(ipoib_workqueue); 544 545 begin = jiffies; 546 547 while (!list_empty(&priv->dead_ahs)) { 548 __ipoib_reap_ah(dev); 549 550 if (time_after(jiffies, begin + HZ)) { 551 ipoib_warn(priv, "timing out; will leak address handles\n"); 552 break; 553 } 554 555 msleep(1); 556 } 557 558 return 0; 559} 560 561int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port) 562{ 563 struct ipoib_dev_priv *priv = netdev_priv(dev); 564 565 priv->ca = ca; 566 priv->port = port; 567 priv->qp = NULL; 568 569 if (ipoib_transport_dev_init(dev, ca)) { 570 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); 571 return -ENODEV; 572 } 573 574 if (dev->flags & IFF_UP) { 575 if (ipoib_ib_dev_open(dev)) { 576 ipoib_transport_dev_cleanup(dev); 577 return -ENODEV; 578 } 579 } 580 581 return 0; 582} 583 584void ipoib_ib_dev_flush(void *_dev) 585{ 586 struct net_device *dev = (struct net_device *)_dev; 587 struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv; 588 589 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 590 return; 591 592 ipoib_dbg(priv, "flushing\n"); 593 594 ipoib_ib_dev_down(dev); 595 596 /* 597 * The device could have been brought down between the start and when 598 * we get here, don't bring it back up if it's not configured up 599 */ 600 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 601 ipoib_ib_dev_up(dev); 602 603 mutex_lock(&priv->vlan_mutex); 604 605 /* Flush any child interfaces too */ 606 list_for_each_entry(cpriv, &priv->child_intfs, list) 607 ipoib_ib_dev_flush(&cpriv->dev); 608 609 mutex_unlock(&priv->vlan_mutex); 610} 611 612void ipoib_ib_dev_cleanup(struct net_device *dev) 613{ 614 struct ipoib_dev_priv *priv = netdev_priv(dev); 615 616 ipoib_dbg(priv, "cleaning up ib_dev\n"); 617 618 ipoib_mcast_stop_thread(dev, 1); 619 ipoib_mcast_dev_flush(dev); 620 621 ipoib_transport_dev_cleanup(dev); 622} 623 624/* 625 * Delayed P_Key Assigment Interim Support 626 * 627 * The following is initial implementation of delayed P_Key assigment 628 * mechanism. It is using the same approach implemented for the multicast 629 * group join. The single goal of this implementation is to quickly address 630 * Bug #2507. This implementation will probably be removed when the P_Key 631 * change async notification is available. 632 */ 633 634static void ipoib_pkey_dev_check_presence(struct net_device *dev) 635{ 636 struct ipoib_dev_priv *priv = netdev_priv(dev); 637 u16 pkey_index = 0; 638 639 if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) 640 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 641 else 642 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); 643} 644 645void ipoib_pkey_poll(void *dev_ptr) 646{ 647 struct net_device *dev = dev_ptr; 648 struct ipoib_dev_priv *priv = netdev_priv(dev); 649 650 ipoib_pkey_dev_check_presence(dev); 651 652 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) 653 ipoib_open(dev); 654 else { 655 mutex_lock(&pkey_mutex); 656 if (!test_bit(IPOIB_PKEY_STOP, &priv->flags)) 657 queue_delayed_work(ipoib_workqueue, 658 &priv->pkey_task, 659 HZ); 660 mutex_unlock(&pkey_mutex); 661 } 662} 663 664int ipoib_pkey_dev_delay_open(struct net_device *dev) 665{ 666 struct ipoib_dev_priv *priv = netdev_priv(dev); 667 668 /* Look for the interface pkey value in the IB Port P_Key table and */ 669 /* set the interface pkey assigment flag */ 670 ipoib_pkey_dev_check_presence(dev); 671 672 /* P_Key value not assigned yet - start polling */ 673 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { 674 mutex_lock(&pkey_mutex); 675 clear_bit(IPOIB_PKEY_STOP, &priv->flags); 676 queue_delayed_work(ipoib_workqueue, 677 &priv->pkey_task, 678 HZ); 679 mutex_unlock(&pkey_mutex); 680 return 1; 681 } 682 683 return 0; 684} 685