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.
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:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
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.
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
35 * $Id: ipoib_ib.c 1386 2004-12-27 16:23:17Z roland $
38 #include <linux/delay.h>
39 #include <linux/dma-mapping.h>
41 #include <rdma/ib_cache.h>
45 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
46 static int data_debug_level;
48 module_param(data_debug_level, int, 0644);
49 MODULE_PARM_DESC(data_debug_level,
50 "Enable data path debug tracing if > 0");
53 static DEFINE_MUTEX(pkey_mutex);
55 struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
56 struct ib_pd *pd, struct ib_ah_attr *attr)
60 ah = kmalloc(sizeof *ah, GFP_KERNEL);
68 ah->ah = ib_create_ah(pd, attr);
73 ipoib_dbg(netdev_priv(dev), "Created ah %p\n", ah->ah);
78 void ipoib_free_ah(struct kref *kref)
80 struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref);
81 struct ipoib_dev_priv *priv = netdev_priv(ah->dev);
85 spin_lock_irqsave(&priv->lock, flags);
86 list_add_tail(&ah->list, &priv->dead_ahs);
87 spin_unlock_irqrestore(&priv->lock, flags);
90 static int ipoib_ib_post_receive(struct net_device *dev, int id)
92 struct ipoib_dev_priv *priv = netdev_priv(dev);
94 struct ib_recv_wr param;
95 struct ib_recv_wr *bad_wr;
98 list.addr = priv->rx_ring[id].mapping;
99 list.length = IPOIB_BUF_SIZE;
100 list.lkey = priv->mr->lkey;
103 param.wr_id = id | IPOIB_OP_RECV;
104 param.sg_list = &list;
107 ret = ib_post_recv(priv->qp, ¶m, &bad_wr);
109 ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret);
110 ib_dma_unmap_single(priv->ca, priv->rx_ring[id].mapping,
111 IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
112 dev_kfree_skb_any(priv->rx_ring[id].skb);
113 priv->rx_ring[id].skb = NULL;
119 static int ipoib_alloc_rx_skb(struct net_device *dev, int id)
121 struct ipoib_dev_priv *priv = netdev_priv(dev);
125 skb = dev_alloc_skb(IPOIB_BUF_SIZE + 4);
130 * IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte
131 * header. So we need 4 more bytes to get to 48 and align the
132 * IP header to a multiple of 16.
136 addr = ib_dma_map_single(priv->ca, skb->data, IPOIB_BUF_SIZE,
138 if (unlikely(ib_dma_mapping_error(priv->ca, addr))) {
139 dev_kfree_skb_any(skb);
143 priv->rx_ring[id].skb = skb;
144 priv->rx_ring[id].mapping = addr;
149 static int ipoib_ib_post_receives(struct net_device *dev)
151 struct ipoib_dev_priv *priv = netdev_priv(dev);
154 for (i = 0; i < ipoib_recvq_size; ++i) {
155 if (ipoib_alloc_rx_skb(dev, i)) {
156 ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
159 if (ipoib_ib_post_receive(dev, i)) {
160 ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i);
168 static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
170 struct ipoib_dev_priv *priv = netdev_priv(dev);
171 unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV;
175 ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n",
178 if (unlikely(wr_id >= ipoib_recvq_size)) {
179 ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n",
180 wr_id, ipoib_recvq_size);
184 skb = priv->rx_ring[wr_id].skb;
185 addr = priv->rx_ring[wr_id].mapping;
187 if (unlikely(wc->status != IB_WC_SUCCESS)) {
188 if (wc->status != IB_WC_WR_FLUSH_ERR)
189 ipoib_warn(priv, "failed recv event "
190 "(status=%d, wrid=%d vend_err %x)\n",
191 wc->status, wr_id, wc->vendor_err);
192 ib_dma_unmap_single(priv->ca, addr,
193 IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
194 dev_kfree_skb_any(skb);
195 priv->rx_ring[wr_id].skb = NULL;
200 * Drop packets that this interface sent, ie multicast packets
201 * that the HCA has replicated.
203 if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num)
207 * If we can't allocate a new RX buffer, dump
208 * this packet and reuse the old buffer.
210 if (unlikely(ipoib_alloc_rx_skb(dev, wr_id))) {
211 ++priv->stats.rx_dropped;
215 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
216 wc->byte_len, wc->slid);
218 ib_dma_unmap_single(priv->ca, addr, IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
220 skb_put(skb, wc->byte_len);
221 skb_pull(skb, IB_GRH_BYTES);
223 skb->protocol = ((struct ipoib_header *) skb->data)->proto;
224 skb_reset_mac_header(skb);
225 skb_pull(skb, IPOIB_ENCAP_LEN);
227 dev->last_rx = jiffies;
228 ++priv->stats.rx_packets;
229 priv->stats.rx_bytes += skb->len;
232 /* XXX get correct PACKET_ type here */
233 skb->pkt_type = PACKET_HOST;
234 netif_receive_skb(skb);
237 if (unlikely(ipoib_ib_post_receive(dev, wr_id)))
238 ipoib_warn(priv, "ipoib_ib_post_receive failed "
239 "for buf %d\n", wr_id);
242 static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
244 struct ipoib_dev_priv *priv = netdev_priv(dev);
245 unsigned int wr_id = wc->wr_id;
246 struct ipoib_tx_buf *tx_req;
249 ipoib_dbg_data(priv, "send completion: id %d, status: %d\n",
252 if (unlikely(wr_id >= ipoib_sendq_size)) {
253 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n",
254 wr_id, ipoib_sendq_size);
258 tx_req = &priv->tx_ring[wr_id];
260 ib_dma_unmap_single(priv->ca, tx_req->mapping,
261 tx_req->skb->len, DMA_TO_DEVICE);
263 ++priv->stats.tx_packets;
264 priv->stats.tx_bytes += tx_req->skb->len;
266 dev_kfree_skb_any(tx_req->skb);
268 spin_lock_irqsave(&priv->tx_lock, flags);
270 if (unlikely(test_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags)) &&
271 priv->tx_head - priv->tx_tail <= ipoib_sendq_size >> 1) {
272 clear_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags);
273 netif_wake_queue(dev);
275 spin_unlock_irqrestore(&priv->tx_lock, flags);
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);
284 int ipoib_poll(struct napi_struct *napi, int budget)
286 struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi);
287 struct net_device *dev = priv->dev;
295 while (done < budget) {
296 int max = (budget - done);
298 t = min(IPOIB_NUM_WC, max);
299 n = ib_poll_cq(priv->cq, t, priv->ibwc);
301 for (i = 0; i < n; i++) {
302 struct ib_wc *wc = priv->ibwc + i;
304 if (wc->wr_id & IPOIB_CM_OP_SRQ) {
306 ipoib_cm_handle_rx_wc(dev, wc);
307 } else if (wc->wr_id & IPOIB_OP_RECV) {
309 ipoib_ib_handle_rx_wc(dev, wc);
311 ipoib_ib_handle_tx_wc(dev, wc);
319 netif_rx_complete(dev, napi);
320 if (unlikely(ib_req_notify_cq(priv->cq,
322 IB_CQ_REPORT_MISSED_EVENTS)) &&
323 netif_rx_reschedule(dev, napi))
330 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
332 struct net_device *dev = dev_ptr;
333 struct ipoib_dev_priv *priv = netdev_priv(dev);
335 netif_rx_schedule(dev, &priv->napi);
338 static inline int post_send(struct ipoib_dev_priv *priv,
340 struct ib_ah *address, u32 qpn,
343 struct ib_send_wr *bad_wr;
345 priv->tx_sge.addr = addr;
346 priv->tx_sge.length = len;
348 priv->tx_wr.wr_id = wr_id;
349 priv->tx_wr.wr.ud.remote_qpn = qpn;
350 priv->tx_wr.wr.ud.ah = address;
352 return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr);
355 void ipoib_send(struct net_device *dev, struct sk_buff *skb,
356 struct ipoib_ah *address, u32 qpn)
358 struct ipoib_dev_priv *priv = netdev_priv(dev);
359 struct ipoib_tx_buf *tx_req;
362 if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) {
363 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
364 skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN);
365 ++priv->stats.tx_dropped;
366 ++priv->stats.tx_errors;
367 ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu);
371 ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n",
372 skb->len, address, qpn);
375 * We put the skb into the tx_ring _before_ we call post_send()
376 * because it's entirely possible that the completion handler will
377 * run before we execute anything after the post_send(). That
378 * means we have to make sure everything is properly recorded and
379 * our state is consistent before we call post_send().
381 tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
383 addr = ib_dma_map_single(priv->ca, skb->data, skb->len,
385 if (unlikely(ib_dma_mapping_error(priv->ca, addr))) {
386 ++priv->stats.tx_errors;
387 dev_kfree_skb_any(skb);
390 tx_req->mapping = addr;
392 if (unlikely(post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),
393 address->ah, qpn, addr, skb->len))) {
394 ipoib_warn(priv, "post_send failed\n");
395 ++priv->stats.tx_errors;
396 ib_dma_unmap_single(priv->ca, addr, skb->len, DMA_TO_DEVICE);
397 dev_kfree_skb_any(skb);
399 dev->trans_start = jiffies;
401 address->last_send = priv->tx_head;
404 if (priv->tx_head - priv->tx_tail == ipoib_sendq_size) {
405 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
406 netif_stop_queue(dev);
407 set_bit(IPOIB_FLAG_NETIF_STOPPED, &priv->flags);
412 static void __ipoib_reap_ah(struct net_device *dev)
414 struct ipoib_dev_priv *priv = netdev_priv(dev);
415 struct ipoib_ah *ah, *tah;
416 LIST_HEAD(remove_list);
418 spin_lock_irq(&priv->tx_lock);
419 spin_lock(&priv->lock);
420 list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
421 if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
423 ib_destroy_ah(ah->ah);
426 spin_unlock(&priv->lock);
427 spin_unlock_irq(&priv->tx_lock);
430 void ipoib_reap_ah(struct work_struct *work)
432 struct ipoib_dev_priv *priv =
433 container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
434 struct net_device *dev = priv->dev;
436 __ipoib_reap_ah(dev);
438 if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
439 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
442 int ipoib_ib_dev_open(struct net_device *dev)
444 struct ipoib_dev_priv *priv = netdev_priv(dev);
447 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) {
448 ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey);
449 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
452 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
454 ret = ipoib_init_qp(dev);
456 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
460 ret = ipoib_ib_post_receives(dev);
462 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
463 ipoib_ib_dev_stop(dev, 1);
467 ret = ipoib_cm_dev_open(dev);
469 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret);
470 ipoib_ib_dev_stop(dev, 1);
474 clear_bit(IPOIB_STOP_REAPER, &priv->flags);
475 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ);
477 set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
482 static void ipoib_pkey_dev_check_presence(struct net_device *dev)
484 struct ipoib_dev_priv *priv = netdev_priv(dev);
487 if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
488 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
490 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
493 int ipoib_ib_dev_up(struct net_device *dev)
495 struct ipoib_dev_priv *priv = netdev_priv(dev);
497 ipoib_pkey_dev_check_presence(dev);
499 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
500 ipoib_dbg(priv, "PKEY is not assigned.\n");
504 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
506 return ipoib_mcast_start_thread(dev);
509 int ipoib_ib_dev_down(struct net_device *dev, int flush)
511 struct ipoib_dev_priv *priv = netdev_priv(dev);
513 ipoib_dbg(priv, "downing ib_dev\n");
515 clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
516 netif_carrier_off(dev);
518 /* Shutdown the P_Key thread if still active */
519 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
520 mutex_lock(&pkey_mutex);
521 set_bit(IPOIB_PKEY_STOP, &priv->flags);
522 cancel_delayed_work(&priv->pkey_poll_task);
523 mutex_unlock(&pkey_mutex);
525 flush_workqueue(ipoib_workqueue);
528 ipoib_mcast_stop_thread(dev, flush);
529 ipoib_mcast_dev_flush(dev);
531 ipoib_flush_paths(dev);
536 static int recvs_pending(struct net_device *dev)
538 struct ipoib_dev_priv *priv = netdev_priv(dev);
542 for (i = 0; i < ipoib_recvq_size; ++i)
543 if (priv->rx_ring[i].skb)
549 void ipoib_drain_cq(struct net_device *dev)
551 struct ipoib_dev_priv *priv = netdev_priv(dev);
554 n = ib_poll_cq(priv->cq, IPOIB_NUM_WC, priv->ibwc);
555 for (i = 0; i < n; ++i) {
556 if (priv->ibwc[i].wr_id & IPOIB_CM_OP_SRQ)
557 ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
558 else if (priv->ibwc[i].wr_id & IPOIB_OP_RECV)
559 ipoib_ib_handle_rx_wc(dev, priv->ibwc + i);
561 ipoib_ib_handle_tx_wc(dev, priv->ibwc + i);
563 } while (n == IPOIB_NUM_WC);
566 int ipoib_ib_dev_stop(struct net_device *dev, int flush)
568 struct ipoib_dev_priv *priv = netdev_priv(dev);
569 struct ib_qp_attr qp_attr;
571 struct ipoib_tx_buf *tx_req;
574 clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
576 ipoib_cm_dev_stop(dev);
579 * Move our QP to the error state and then reinitialize in
580 * when all work requests have completed or have been flushed.
582 qp_attr.qp_state = IB_QPS_ERR;
583 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
584 ipoib_warn(priv, "Failed to modify QP to ERROR state\n");
586 /* Wait for all sends and receives to complete */
589 while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) {
590 if (time_after(jiffies, begin + 5 * HZ)) {
591 ipoib_warn(priv, "timing out; %d sends %d receives not completed\n",
592 priv->tx_head - priv->tx_tail, recvs_pending(dev));
595 * assume the HW is wedged and just free up
596 * all our pending work requests.
598 while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
599 tx_req = &priv->tx_ring[priv->tx_tail &
600 (ipoib_sendq_size - 1)];
601 ib_dma_unmap_single(priv->ca,
605 dev_kfree_skb_any(tx_req->skb);
609 for (i = 0; i < ipoib_recvq_size; ++i) {
610 struct ipoib_rx_buf *rx_req;
612 rx_req = &priv->rx_ring[i];
615 ib_dma_unmap_single(priv->ca,
619 dev_kfree_skb_any(rx_req->skb);
631 ipoib_dbg(priv, "All sends and receives done.\n");
634 qp_attr.qp_state = IB_QPS_RESET;
635 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
636 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
638 /* Wait for all AHs to be reaped */
639 set_bit(IPOIB_STOP_REAPER, &priv->flags);
640 cancel_delayed_work(&priv->ah_reap_task);
642 flush_workqueue(ipoib_workqueue);
646 while (!list_empty(&priv->dead_ahs)) {
647 __ipoib_reap_ah(dev);
649 if (time_after(jiffies, begin + HZ)) {
650 ipoib_warn(priv, "timing out; will leak address handles\n");
657 ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP);
662 int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
664 struct ipoib_dev_priv *priv = netdev_priv(dev);
670 if (ipoib_transport_dev_init(dev, ca)) {
671 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name);
675 if (dev->flags & IFF_UP) {
676 if (ipoib_ib_dev_open(dev)) {
677 ipoib_transport_dev_cleanup(dev);
685 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, int pkey_event)
687 struct ipoib_dev_priv *cpriv;
688 struct net_device *dev = priv->dev;
691 mutex_lock(&priv->vlan_mutex);
694 * Flush any child interfaces too -- they might be up even if
695 * the parent is down.
697 list_for_each_entry(cpriv, &priv->child_intfs, list)
698 __ipoib_ib_dev_flush(cpriv, pkey_event);
700 mutex_unlock(&priv->vlan_mutex);
702 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) {
703 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
707 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
708 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
713 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) {
714 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
715 ipoib_ib_dev_down(dev, 0);
716 ipoib_pkey_dev_delay_open(dev);
719 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
721 /* restart QP only if P_Key index is changed */
722 if (new_index == priv->pkey_index) {
723 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
726 priv->pkey_index = new_index;
729 ipoib_dbg(priv, "flushing\n");
731 ipoib_ib_dev_down(dev, 0);
734 ipoib_ib_dev_stop(dev, 0);
735 ipoib_ib_dev_open(dev);
739 * The device could have been brought down between the start and when
740 * we get here, don't bring it back up if it's not configured up
742 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
743 ipoib_ib_dev_up(dev);
744 ipoib_mcast_restart_task(&priv->restart_task);
748 void ipoib_ib_dev_flush(struct work_struct *work)
750 struct ipoib_dev_priv *priv =
751 container_of(work, struct ipoib_dev_priv, flush_task);
753 ipoib_dbg(priv, "Flushing %s\n", priv->dev->name);
754 __ipoib_ib_dev_flush(priv, 0);
757 void ipoib_pkey_event(struct work_struct *work)
759 struct ipoib_dev_priv *priv =
760 container_of(work, struct ipoib_dev_priv, pkey_event_task);
762 ipoib_dbg(priv, "Flushing %s and restarting its QP\n", priv->dev->name);
763 __ipoib_ib_dev_flush(priv, 1);
766 void ipoib_ib_dev_cleanup(struct net_device *dev)
768 struct ipoib_dev_priv *priv = netdev_priv(dev);
770 ipoib_dbg(priv, "cleaning up ib_dev\n");
772 ipoib_mcast_stop_thread(dev, 1);
773 ipoib_mcast_dev_flush(dev);
775 ipoib_transport_dev_cleanup(dev);
779 * Delayed P_Key Assigment Interim Support
781 * The following is initial implementation of delayed P_Key assigment
782 * mechanism. It is using the same approach implemented for the multicast
783 * group join. The single goal of this implementation is to quickly address
784 * Bug #2507. This implementation will probably be removed when the P_Key
785 * change async notification is available.
788 void ipoib_pkey_poll(struct work_struct *work)
790 struct ipoib_dev_priv *priv =
791 container_of(work, struct ipoib_dev_priv, pkey_poll_task.work);
792 struct net_device *dev = priv->dev;
794 ipoib_pkey_dev_check_presence(dev);
796 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
799 mutex_lock(&pkey_mutex);
800 if (!test_bit(IPOIB_PKEY_STOP, &priv->flags))
801 queue_delayed_work(ipoib_workqueue,
802 &priv->pkey_poll_task,
804 mutex_unlock(&pkey_mutex);
808 int ipoib_pkey_dev_delay_open(struct net_device *dev)
810 struct ipoib_dev_priv *priv = netdev_priv(dev);
812 /* Look for the interface pkey value in the IB Port P_Key table and */
813 /* set the interface pkey assigment flag */
814 ipoib_pkey_dev_check_presence(dev);
816 /* P_Key value not assigned yet - start polling */
817 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
818 mutex_lock(&pkey_mutex);
819 clear_bit(IPOIB_PKEY_STOP, &priv->flags);
820 queue_delayed_work(ipoib_workqueue,
821 &priv->pkey_poll_task,
823 mutex_unlock(&pkey_mutex);