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>
43 #include <linux/tcp.h>
47 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
48 static int data_debug_level;
50 module_param(data_debug_level, int, 0644);
51 MODULE_PARM_DESC(data_debug_level,
52 "Enable data path debug tracing if > 0");
55 static DEFINE_MUTEX(pkey_mutex);
57 struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
58 struct ib_pd *pd, struct ib_ah_attr *attr)
62 ah = kmalloc(sizeof *ah, GFP_KERNEL);
70 ah->ah = ib_create_ah(pd, attr);
75 ipoib_dbg(netdev_priv(dev), "Created ah %p\n", ah->ah);
80 void ipoib_free_ah(struct kref *kref)
82 struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref);
83 struct ipoib_dev_priv *priv = netdev_priv(ah->dev);
87 spin_lock_irqsave(&priv->lock, flags);
88 list_add_tail(&ah->list, &priv->dead_ahs);
89 spin_unlock_irqrestore(&priv->lock, flags);
92 static int ipoib_ib_post_receive(struct net_device *dev, int id)
94 struct ipoib_dev_priv *priv = netdev_priv(dev);
96 struct ib_recv_wr param;
97 struct ib_recv_wr *bad_wr;
100 list.addr = priv->rx_ring[id].mapping;
101 list.length = IPOIB_BUF_SIZE;
102 list.lkey = priv->mr->lkey;
105 param.wr_id = id | IPOIB_OP_RECV;
106 param.sg_list = &list;
109 ret = ib_post_recv(priv->qp, ¶m, &bad_wr);
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;
121 static int ipoib_alloc_rx_skb(struct net_device *dev, int id)
123 struct ipoib_dev_priv *priv = netdev_priv(dev);
127 skb = dev_alloc_skb(IPOIB_BUF_SIZE + 4);
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.
138 addr = ib_dma_map_single(priv->ca, skb->data, IPOIB_BUF_SIZE,
140 if (unlikely(ib_dma_mapping_error(priv->ca, addr))) {
141 dev_kfree_skb_any(skb);
145 priv->rx_ring[id].skb = skb;
146 priv->rx_ring[id].mapping = addr;
151 static int ipoib_ib_post_receives(struct net_device *dev)
153 struct ipoib_dev_priv *priv = netdev_priv(dev);
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);
161 if (ipoib_ib_post_receive(dev, i)) {
162 ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i);
170 static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
172 struct ipoib_dev_priv *priv = netdev_priv(dev);
173 unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV;
177 ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n",
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);
186 skb = priv->rx_ring[wr_id].skb;
187 addr = priv->rx_ring[wr_id].mapping;
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;
202 * Drop packets that this interface sent, ie multicast packets
203 * that the HCA has replicated.
205 if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num)
209 * If we can't allocate a new RX buffer, dump
210 * this packet and reuse the old buffer.
212 if (unlikely(ipoib_alloc_rx_skb(dev, wr_id))) {
213 ++dev->stats.rx_dropped;
217 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
218 wc->byte_len, wc->slid);
220 ib_dma_unmap_single(priv->ca, addr, IPOIB_BUF_SIZE, DMA_FROM_DEVICE);
222 skb_put(skb, wc->byte_len);
223 skb_pull(skb, IB_GRH_BYTES);
225 skb->protocol = ((struct ipoib_header *) skb->data)->proto;
226 skb_reset_mac_header(skb);
227 skb_pull(skb, IPOIB_ENCAP_LEN);
229 dev->last_rx = jiffies;
230 ++dev->stats.rx_packets;
231 dev->stats.rx_bytes += skb->len;
234 /* XXX get correct PACKET_ type here */
235 skb->pkt_type = PACKET_HOST;
237 if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->csum_ok))
238 skb->ip_summed = CHECKSUM_UNNECESSARY;
240 netif_receive_skb(skb);
243 if (unlikely(ipoib_ib_post_receive(dev, wr_id)))
244 ipoib_warn(priv, "ipoib_ib_post_receive failed "
245 "for buf %d\n", wr_id);
248 static int ipoib_dma_map_tx(struct ib_device *ca,
249 struct ipoib_tx_buf *tx_req)
251 struct sk_buff *skb = tx_req->skb;
252 u64 *mapping = tx_req->mapping;
256 if (skb_headlen(skb)) {
257 mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb),
259 if (unlikely(ib_dma_mapping_error(ca, mapping[0])))
266 for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
267 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
268 mapping[i + off] = ib_dma_map_page(ca, frag->page,
269 frag->page_offset, frag->size,
271 if (unlikely(ib_dma_mapping_error(ca, mapping[i + off])))
278 skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
279 ib_dma_unmap_page(ca, mapping[i - !off], frag->size, DMA_TO_DEVICE);
283 ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);
288 static void ipoib_dma_unmap_tx(struct ib_device *ca,
289 struct ipoib_tx_buf *tx_req)
291 struct sk_buff *skb = tx_req->skb;
292 u64 *mapping = tx_req->mapping;
296 if (skb_headlen(skb)) {
297 ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);
302 for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
303 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
304 ib_dma_unmap_page(ca, mapping[i + off], frag->size,
309 static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
311 struct ipoib_dev_priv *priv = netdev_priv(dev);
312 unsigned int wr_id = wc->wr_id;
313 struct ipoib_tx_buf *tx_req;
316 ipoib_dbg_data(priv, "send completion: id %d, status: %d\n",
319 if (unlikely(wr_id >= ipoib_sendq_size)) {
320 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n",
321 wr_id, ipoib_sendq_size);
325 tx_req = &priv->tx_ring[wr_id];
327 ipoib_dma_unmap_tx(priv->ca, tx_req);
329 ++dev->stats.tx_packets;
330 dev->stats.tx_bytes += tx_req->skb->len;
332 dev_kfree_skb_any(tx_req->skb);
334 spin_lock_irqsave(&priv->tx_lock, flags);
336 if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
337 netif_queue_stopped(dev) &&
338 test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
339 netif_wake_queue(dev);
340 spin_unlock_irqrestore(&priv->tx_lock, flags);
342 if (wc->status != IB_WC_SUCCESS &&
343 wc->status != IB_WC_WR_FLUSH_ERR)
344 ipoib_warn(priv, "failed send event "
345 "(status=%d, wrid=%d vend_err %x)\n",
346 wc->status, wr_id, wc->vendor_err);
349 int ipoib_poll(struct napi_struct *napi, int budget)
351 struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi);
352 struct net_device *dev = priv->dev;
360 while (done < budget) {
361 int max = (budget - done);
363 t = min(IPOIB_NUM_WC, max);
364 n = ib_poll_cq(priv->cq, t, priv->ibwc);
366 for (i = 0; i < n; i++) {
367 struct ib_wc *wc = priv->ibwc + i;
369 if (wc->wr_id & IPOIB_OP_RECV) {
371 if (wc->wr_id & IPOIB_OP_CM)
372 ipoib_cm_handle_rx_wc(dev, wc);
374 ipoib_ib_handle_rx_wc(dev, wc);
376 if (wc->wr_id & IPOIB_OP_CM)
377 ipoib_cm_handle_tx_wc(dev, wc);
379 ipoib_ib_handle_tx_wc(dev, wc);
388 netif_rx_complete(dev, napi);
389 if (unlikely(ib_req_notify_cq(priv->cq,
391 IB_CQ_REPORT_MISSED_EVENTS)) &&
392 netif_rx_reschedule(dev, napi))
399 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
401 struct net_device *dev = dev_ptr;
402 struct ipoib_dev_priv *priv = netdev_priv(dev);
404 netif_rx_schedule(dev, &priv->napi);
407 static inline int post_send(struct ipoib_dev_priv *priv,
409 struct ib_ah *address, u32 qpn,
410 struct ipoib_tx_buf *tx_req,
411 void *head, int hlen)
413 struct ib_send_wr *bad_wr;
415 struct sk_buff *skb = tx_req->skb;
416 skb_frag_t *frags = skb_shinfo(skb)->frags;
417 int nr_frags = skb_shinfo(skb)->nr_frags;
418 u64 *mapping = tx_req->mapping;
420 if (skb_headlen(skb)) {
421 priv->tx_sge[0].addr = mapping[0];
422 priv->tx_sge[0].length = skb_headlen(skb);
427 for (i = 0; i < nr_frags; ++i) {
428 priv->tx_sge[i + off].addr = mapping[i + off];
429 priv->tx_sge[i + off].length = frags[i].size;
431 priv->tx_wr.num_sge = nr_frags + off;
432 priv->tx_wr.wr_id = wr_id;
433 priv->tx_wr.wr.ud.remote_qpn = qpn;
434 priv->tx_wr.wr.ud.ah = address;
437 priv->tx_wr.wr.ud.mss = skb_shinfo(skb)->gso_size;
438 priv->tx_wr.wr.ud.header = head;
439 priv->tx_wr.wr.ud.hlen = hlen;
440 priv->tx_wr.opcode = IB_WR_LSO;
442 priv->tx_wr.opcode = IB_WR_SEND;
444 return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr);
447 void ipoib_send(struct net_device *dev, struct sk_buff *skb,
448 struct ipoib_ah *address, u32 qpn)
450 struct ipoib_dev_priv *priv = netdev_priv(dev);
451 struct ipoib_tx_buf *tx_req;
455 if (skb_is_gso(skb)) {
456 hlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
458 if (unlikely(!skb_pull(skb, hlen))) {
459 ipoib_warn(priv, "linear data too small\n");
460 ++dev->stats.tx_dropped;
461 ++dev->stats.tx_errors;
462 dev_kfree_skb_any(skb);
466 if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) {
467 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
468 skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN);
469 ++dev->stats.tx_dropped;
470 ++dev->stats.tx_errors;
471 ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu);
478 ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n",
479 skb->len, address, qpn);
482 * We put the skb into the tx_ring _before_ we call post_send()
483 * because it's entirely possible that the completion handler will
484 * run before we execute anything after the post_send(). That
485 * means we have to make sure everything is properly recorded and
486 * our state is consistent before we call post_send().
488 tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
490 if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) {
491 ++dev->stats.tx_errors;
492 dev_kfree_skb_any(skb);
496 if (skb->ip_summed == CHECKSUM_PARTIAL)
497 priv->tx_wr.send_flags |= IB_SEND_IP_CSUM;
499 priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM;
501 if (unlikely(post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),
502 address->ah, qpn, tx_req, phead, hlen))) {
503 ipoib_warn(priv, "post_send failed\n");
504 ++dev->stats.tx_errors;
505 ipoib_dma_unmap_tx(priv->ca, tx_req);
506 dev_kfree_skb_any(skb);
508 dev->trans_start = jiffies;
510 address->last_send = priv->tx_head;
513 if (++priv->tx_outstanding == ipoib_sendq_size) {
514 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
515 netif_stop_queue(dev);
520 static void __ipoib_reap_ah(struct net_device *dev)
522 struct ipoib_dev_priv *priv = netdev_priv(dev);
523 struct ipoib_ah *ah, *tah;
524 LIST_HEAD(remove_list);
526 spin_lock_irq(&priv->tx_lock);
527 spin_lock(&priv->lock);
528 list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
529 if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
531 ib_destroy_ah(ah->ah);
534 spin_unlock(&priv->lock);
535 spin_unlock_irq(&priv->tx_lock);
538 void ipoib_reap_ah(struct work_struct *work)
540 struct ipoib_dev_priv *priv =
541 container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
542 struct net_device *dev = priv->dev;
544 __ipoib_reap_ah(dev);
546 if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
547 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
548 round_jiffies_relative(HZ));
551 int ipoib_ib_dev_open(struct net_device *dev)
553 struct ipoib_dev_priv *priv = netdev_priv(dev);
556 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) {
557 ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey);
558 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
561 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
563 ret = ipoib_init_qp(dev);
565 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
569 ret = ipoib_ib_post_receives(dev);
571 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
572 ipoib_ib_dev_stop(dev, 1);
576 ret = ipoib_cm_dev_open(dev);
578 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret);
579 ipoib_ib_dev_stop(dev, 1);
583 clear_bit(IPOIB_STOP_REAPER, &priv->flags);
584 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
585 round_jiffies_relative(HZ));
587 set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
592 static void ipoib_pkey_dev_check_presence(struct net_device *dev)
594 struct ipoib_dev_priv *priv = netdev_priv(dev);
597 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
598 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
600 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
603 int ipoib_ib_dev_up(struct net_device *dev)
605 struct ipoib_dev_priv *priv = netdev_priv(dev);
607 ipoib_pkey_dev_check_presence(dev);
609 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
610 ipoib_dbg(priv, "PKEY is not assigned.\n");
614 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
616 return ipoib_mcast_start_thread(dev);
619 int ipoib_ib_dev_down(struct net_device *dev, int flush)
621 struct ipoib_dev_priv *priv = netdev_priv(dev);
623 ipoib_dbg(priv, "downing ib_dev\n");
625 clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
626 netif_carrier_off(dev);
628 /* Shutdown the P_Key thread if still active */
629 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
630 mutex_lock(&pkey_mutex);
631 set_bit(IPOIB_PKEY_STOP, &priv->flags);
632 cancel_delayed_work(&priv->pkey_poll_task);
633 mutex_unlock(&pkey_mutex);
635 flush_workqueue(ipoib_workqueue);
638 ipoib_mcast_stop_thread(dev, flush);
639 ipoib_mcast_dev_flush(dev);
641 ipoib_flush_paths(dev);
646 static int recvs_pending(struct net_device *dev)
648 struct ipoib_dev_priv *priv = netdev_priv(dev);
652 for (i = 0; i < ipoib_recvq_size; ++i)
653 if (priv->rx_ring[i].skb)
659 void ipoib_drain_cq(struct net_device *dev)
661 struct ipoib_dev_priv *priv = netdev_priv(dev);
664 n = ib_poll_cq(priv->cq, IPOIB_NUM_WC, priv->ibwc);
665 for (i = 0; i < n; ++i) {
667 * Convert any successful completions to flush
668 * errors to avoid passing packets up the
669 * stack after bringing the device down.
671 if (priv->ibwc[i].status == IB_WC_SUCCESS)
672 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
674 if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) {
675 if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
676 ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
678 ipoib_ib_handle_rx_wc(dev, priv->ibwc + i);
680 if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
681 ipoib_cm_handle_tx_wc(dev, priv->ibwc + i);
683 ipoib_ib_handle_tx_wc(dev, priv->ibwc + i);
686 } while (n == IPOIB_NUM_WC);
689 int ipoib_ib_dev_stop(struct net_device *dev, int flush)
691 struct ipoib_dev_priv *priv = netdev_priv(dev);
692 struct ib_qp_attr qp_attr;
694 struct ipoib_tx_buf *tx_req;
697 clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
699 ipoib_cm_dev_stop(dev);
702 * Move our QP to the error state and then reinitialize in
703 * when all work requests have completed or have been flushed.
705 qp_attr.qp_state = IB_QPS_ERR;
706 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
707 ipoib_warn(priv, "Failed to modify QP to ERROR state\n");
709 /* Wait for all sends and receives to complete */
712 while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) {
713 if (time_after(jiffies, begin + 5 * HZ)) {
714 ipoib_warn(priv, "timing out; %d sends %d receives not completed\n",
715 priv->tx_head - priv->tx_tail, recvs_pending(dev));
718 * assume the HW is wedged and just free up
719 * all our pending work requests.
721 while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
722 tx_req = &priv->tx_ring[priv->tx_tail &
723 (ipoib_sendq_size - 1)];
724 ipoib_dma_unmap_tx(priv->ca, tx_req);
725 dev_kfree_skb_any(tx_req->skb);
727 --priv->tx_outstanding;
730 for (i = 0; i < ipoib_recvq_size; ++i) {
731 struct ipoib_rx_buf *rx_req;
733 rx_req = &priv->rx_ring[i];
736 ib_dma_unmap_single(priv->ca,
740 dev_kfree_skb_any(rx_req->skb);
752 ipoib_dbg(priv, "All sends and receives done.\n");
755 qp_attr.qp_state = IB_QPS_RESET;
756 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
757 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
759 /* Wait for all AHs to be reaped */
760 set_bit(IPOIB_STOP_REAPER, &priv->flags);
761 cancel_delayed_work(&priv->ah_reap_task);
763 flush_workqueue(ipoib_workqueue);
767 while (!list_empty(&priv->dead_ahs)) {
768 __ipoib_reap_ah(dev);
770 if (time_after(jiffies, begin + HZ)) {
771 ipoib_warn(priv, "timing out; will leak address handles\n");
778 ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP);
783 int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
785 struct ipoib_dev_priv *priv = netdev_priv(dev);
791 if (ipoib_transport_dev_init(dev, ca)) {
792 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name);
796 if (dev->flags & IFF_UP) {
797 if (ipoib_ib_dev_open(dev)) {
798 ipoib_transport_dev_cleanup(dev);
806 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, int pkey_event)
808 struct ipoib_dev_priv *cpriv;
809 struct net_device *dev = priv->dev;
812 mutex_lock(&priv->vlan_mutex);
815 * Flush any child interfaces too -- they might be up even if
816 * the parent is down.
818 list_for_each_entry(cpriv, &priv->child_intfs, list)
819 __ipoib_ib_dev_flush(cpriv, pkey_event);
821 mutex_unlock(&priv->vlan_mutex);
823 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) {
824 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
828 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
829 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
834 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) {
835 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
836 ipoib_ib_dev_down(dev, 0);
837 ipoib_ib_dev_stop(dev, 0);
838 if (ipoib_pkey_dev_delay_open(dev))
842 /* restart QP only if P_Key index is changed */
843 if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
844 new_index == priv->pkey_index) {
845 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
848 priv->pkey_index = new_index;
851 ipoib_dbg(priv, "flushing\n");
853 ipoib_ib_dev_down(dev, 0);
856 ipoib_ib_dev_stop(dev, 0);
857 ipoib_ib_dev_open(dev);
861 * The device could have been brought down between the start and when
862 * we get here, don't bring it back up if it's not configured up
864 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
865 ipoib_ib_dev_up(dev);
866 ipoib_mcast_restart_task(&priv->restart_task);
870 void ipoib_ib_dev_flush(struct work_struct *work)
872 struct ipoib_dev_priv *priv =
873 container_of(work, struct ipoib_dev_priv, flush_task);
875 ipoib_dbg(priv, "Flushing %s\n", priv->dev->name);
876 __ipoib_ib_dev_flush(priv, 0);
879 void ipoib_pkey_event(struct work_struct *work)
881 struct ipoib_dev_priv *priv =
882 container_of(work, struct ipoib_dev_priv, pkey_event_task);
884 ipoib_dbg(priv, "Flushing %s and restarting its QP\n", priv->dev->name);
885 __ipoib_ib_dev_flush(priv, 1);
888 void ipoib_ib_dev_cleanup(struct net_device *dev)
890 struct ipoib_dev_priv *priv = netdev_priv(dev);
892 ipoib_dbg(priv, "cleaning up ib_dev\n");
894 ipoib_mcast_stop_thread(dev, 1);
895 ipoib_mcast_dev_flush(dev);
897 ipoib_transport_dev_cleanup(dev);
901 * Delayed P_Key Assigment Interim Support
903 * The following is initial implementation of delayed P_Key assigment
904 * mechanism. It is using the same approach implemented for the multicast
905 * group join. The single goal of this implementation is to quickly address
906 * Bug #2507. This implementation will probably be removed when the P_Key
907 * change async notification is available.
910 void ipoib_pkey_poll(struct work_struct *work)
912 struct ipoib_dev_priv *priv =
913 container_of(work, struct ipoib_dev_priv, pkey_poll_task.work);
914 struct net_device *dev = priv->dev;
916 ipoib_pkey_dev_check_presence(dev);
918 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
921 mutex_lock(&pkey_mutex);
922 if (!test_bit(IPOIB_PKEY_STOP, &priv->flags))
923 queue_delayed_work(ipoib_workqueue,
924 &priv->pkey_poll_task,
926 mutex_unlock(&pkey_mutex);
930 int ipoib_pkey_dev_delay_open(struct net_device *dev)
932 struct ipoib_dev_priv *priv = netdev_priv(dev);
934 /* Look for the interface pkey value in the IB Port P_Key table and */
935 /* set the interface pkey assigment flag */
936 ipoib_pkey_dev_check_presence(dev);
938 /* P_Key value not assigned yet - start polling */
939 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
940 mutex_lock(&pkey_mutex);
941 clear_bit(IPOIB_PKEY_STOP, &priv->flags);
942 queue_delayed_work(ipoib_workqueue,
943 &priv->pkey_poll_task,
945 mutex_unlock(&pkey_mutex);