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 void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv *priv,
93 u64 mapping[IPOIB_UD_RX_SG])
95 if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
96 ib_dma_unmap_single(priv->ca, mapping[0], IPOIB_UD_HEAD_SIZE,
98 ib_dma_unmap_page(priv->ca, mapping[1], PAGE_SIZE,
101 ib_dma_unmap_single(priv->ca, mapping[0],
102 IPOIB_UD_BUF_SIZE(priv->max_ib_mtu),
106 static void ipoib_ud_skb_put_frags(struct ipoib_dev_priv *priv,
110 if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
111 skb_frag_t *frag = &skb_shinfo(skb)->frags[0];
114 * There is only two buffers needed for max_payload = 4K,
115 * first buf size is IPOIB_UD_HEAD_SIZE
117 skb->tail += IPOIB_UD_HEAD_SIZE;
120 size = length - IPOIB_UD_HEAD_SIZE;
123 skb->data_len += size;
124 skb->truesize += size;
126 skb_put(skb, length);
130 static int ipoib_ib_post_receive(struct net_device *dev, int id)
132 struct ipoib_dev_priv *priv = netdev_priv(dev);
133 struct ib_recv_wr *bad_wr;
136 priv->rx_wr.wr_id = id | IPOIB_OP_RECV;
137 priv->rx_sge[0].addr = priv->rx_ring[id].mapping[0];
138 priv->rx_sge[1].addr = priv->rx_ring[id].mapping[1];
141 ret = ib_post_recv(priv->qp, &priv->rx_wr, &bad_wr);
143 ipoib_warn(priv, "receive failed for buf %d (%d)\n", id, ret);
144 ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[id].mapping);
145 dev_kfree_skb_any(priv->rx_ring[id].skb);
146 priv->rx_ring[id].skb = NULL;
152 static struct sk_buff *ipoib_alloc_rx_skb(struct net_device *dev, int id)
154 struct ipoib_dev_priv *priv = netdev_priv(dev);
159 if (ipoib_ud_need_sg(priv->max_ib_mtu))
160 buf_size = IPOIB_UD_HEAD_SIZE;
162 buf_size = IPOIB_UD_BUF_SIZE(priv->max_ib_mtu);
164 skb = dev_alloc_skb(buf_size + 4);
169 * IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte
170 * header. So we need 4 more bytes to get to 48 and align the
171 * IP header to a multiple of 16.
175 mapping = priv->rx_ring[id].mapping;
176 mapping[0] = ib_dma_map_single(priv->ca, skb->data, buf_size,
178 if (unlikely(ib_dma_mapping_error(priv->ca, mapping[0])))
181 if (ipoib_ud_need_sg(priv->max_ib_mtu)) {
182 struct page *page = alloc_page(GFP_ATOMIC);
185 skb_fill_page_desc(skb, 0, page, 0, PAGE_SIZE);
187 ib_dma_map_page(priv->ca, skb_shinfo(skb)->frags[0].page,
188 0, PAGE_SIZE, DMA_FROM_DEVICE);
189 if (unlikely(ib_dma_mapping_error(priv->ca, mapping[1])))
193 priv->rx_ring[id].skb = skb;
197 ib_dma_unmap_single(priv->ca, mapping[0], buf_size, DMA_FROM_DEVICE);
199 dev_kfree_skb_any(skb);
203 static int ipoib_ib_post_receives(struct net_device *dev)
205 struct ipoib_dev_priv *priv = netdev_priv(dev);
208 for (i = 0; i < ipoib_recvq_size; ++i) {
209 if (!ipoib_alloc_rx_skb(dev, i)) {
210 ipoib_warn(priv, "failed to allocate receive buffer %d\n", i);
213 if (ipoib_ib_post_receive(dev, i)) {
214 ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i);
222 static void ipoib_ib_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
224 struct ipoib_dev_priv *priv = netdev_priv(dev);
225 unsigned int wr_id = wc->wr_id & ~IPOIB_OP_RECV;
227 u64 mapping[IPOIB_UD_RX_SG];
229 ipoib_dbg_data(priv, "recv completion: id %d, status: %d\n",
232 if (unlikely(wr_id >= ipoib_recvq_size)) {
233 ipoib_warn(priv, "recv completion event with wrid %d (> %d)\n",
234 wr_id, ipoib_recvq_size);
238 skb = priv->rx_ring[wr_id].skb;
240 if (unlikely(wc->status != IB_WC_SUCCESS)) {
241 if (wc->status != IB_WC_WR_FLUSH_ERR)
242 ipoib_warn(priv, "failed recv event "
243 "(status=%d, wrid=%d vend_err %x)\n",
244 wc->status, wr_id, wc->vendor_err);
245 ipoib_ud_dma_unmap_rx(priv, priv->rx_ring[wr_id].mapping);
246 dev_kfree_skb_any(skb);
247 priv->rx_ring[wr_id].skb = NULL;
252 * Drop packets that this interface sent, ie multicast packets
253 * that the HCA has replicated.
255 if (wc->slid == priv->local_lid && wc->src_qp == priv->qp->qp_num)
258 memcpy(mapping, priv->rx_ring[wr_id].mapping,
259 IPOIB_UD_RX_SG * sizeof *mapping);
262 * If we can't allocate a new RX buffer, dump
263 * this packet and reuse the old buffer.
265 if (unlikely(!ipoib_alloc_rx_skb(dev, wr_id))) {
266 ++dev->stats.rx_dropped;
270 ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n",
271 wc->byte_len, wc->slid);
273 ipoib_ud_dma_unmap_rx(priv, mapping);
274 ipoib_ud_skb_put_frags(priv, skb, wc->byte_len);
276 skb_pull(skb, IB_GRH_BYTES);
278 skb->protocol = ((struct ipoib_header *) skb->data)->proto;
279 skb_reset_mac_header(skb);
280 skb_pull(skb, IPOIB_ENCAP_LEN);
282 dev->last_rx = jiffies;
283 ++dev->stats.rx_packets;
284 dev->stats.rx_bytes += skb->len;
287 /* XXX get correct PACKET_ type here */
288 skb->pkt_type = PACKET_HOST;
290 if (test_bit(IPOIB_FLAG_CSUM, &priv->flags) && likely(wc->csum_ok))
291 skb->ip_summed = CHECKSUM_UNNECESSARY;
293 netif_receive_skb(skb);
296 if (unlikely(ipoib_ib_post_receive(dev, wr_id)))
297 ipoib_warn(priv, "ipoib_ib_post_receive failed "
298 "for buf %d\n", wr_id);
301 static int ipoib_dma_map_tx(struct ib_device *ca,
302 struct ipoib_tx_buf *tx_req)
304 struct sk_buff *skb = tx_req->skb;
305 u64 *mapping = tx_req->mapping;
309 if (skb_headlen(skb)) {
310 mapping[0] = ib_dma_map_single(ca, skb->data, skb_headlen(skb),
312 if (unlikely(ib_dma_mapping_error(ca, mapping[0])))
319 for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
320 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
321 mapping[i + off] = ib_dma_map_page(ca, frag->page,
322 frag->page_offset, frag->size,
324 if (unlikely(ib_dma_mapping_error(ca, mapping[i + off])))
331 skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
332 ib_dma_unmap_page(ca, mapping[i - !off], frag->size, DMA_TO_DEVICE);
336 ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);
341 static void ipoib_dma_unmap_tx(struct ib_device *ca,
342 struct ipoib_tx_buf *tx_req)
344 struct sk_buff *skb = tx_req->skb;
345 u64 *mapping = tx_req->mapping;
349 if (skb_headlen(skb)) {
350 ib_dma_unmap_single(ca, mapping[0], skb_headlen(skb), DMA_TO_DEVICE);
355 for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
356 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
357 ib_dma_unmap_page(ca, mapping[i + off], frag->size,
362 static void ipoib_ib_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
364 struct ipoib_dev_priv *priv = netdev_priv(dev);
365 unsigned int wr_id = wc->wr_id;
366 struct ipoib_tx_buf *tx_req;
369 ipoib_dbg_data(priv, "send completion: id %d, status: %d\n",
372 if (unlikely(wr_id >= ipoib_sendq_size)) {
373 ipoib_warn(priv, "send completion event with wrid %d (> %d)\n",
374 wr_id, ipoib_sendq_size);
378 tx_req = &priv->tx_ring[wr_id];
380 ipoib_dma_unmap_tx(priv->ca, tx_req);
382 ++dev->stats.tx_packets;
383 dev->stats.tx_bytes += tx_req->skb->len;
385 dev_kfree_skb_any(tx_req->skb);
387 spin_lock_irqsave(&priv->tx_lock, flags);
389 if (unlikely(--priv->tx_outstanding == ipoib_sendq_size >> 1) &&
390 netif_queue_stopped(dev) &&
391 test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
392 netif_wake_queue(dev);
393 spin_unlock_irqrestore(&priv->tx_lock, flags);
395 if (wc->status != IB_WC_SUCCESS &&
396 wc->status != IB_WC_WR_FLUSH_ERR)
397 ipoib_warn(priv, "failed send event "
398 "(status=%d, wrid=%d vend_err %x)\n",
399 wc->status, wr_id, wc->vendor_err);
402 int ipoib_poll(struct napi_struct *napi, int budget)
404 struct ipoib_dev_priv *priv = container_of(napi, struct ipoib_dev_priv, napi);
405 struct net_device *dev = priv->dev;
413 while (done < budget) {
414 int max = (budget - done);
416 t = min(IPOIB_NUM_WC, max);
417 n = ib_poll_cq(priv->cq, t, priv->ibwc);
419 for (i = 0; i < n; i++) {
420 struct ib_wc *wc = priv->ibwc + i;
422 if (wc->wr_id & IPOIB_OP_RECV) {
424 if (wc->wr_id & IPOIB_OP_CM)
425 ipoib_cm_handle_rx_wc(dev, wc);
427 ipoib_ib_handle_rx_wc(dev, wc);
429 if (wc->wr_id & IPOIB_OP_CM)
430 ipoib_cm_handle_tx_wc(dev, wc);
432 ipoib_ib_handle_tx_wc(dev, wc);
441 netif_rx_complete(dev, napi);
442 if (unlikely(ib_req_notify_cq(priv->cq,
444 IB_CQ_REPORT_MISSED_EVENTS)) &&
445 netif_rx_reschedule(dev, napi))
452 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr)
454 struct net_device *dev = dev_ptr;
455 struct ipoib_dev_priv *priv = netdev_priv(dev);
457 netif_rx_schedule(dev, &priv->napi);
460 static inline int post_send(struct ipoib_dev_priv *priv,
462 struct ib_ah *address, u32 qpn,
463 struct ipoib_tx_buf *tx_req,
464 void *head, int hlen)
466 struct ib_send_wr *bad_wr;
468 struct sk_buff *skb = tx_req->skb;
469 skb_frag_t *frags = skb_shinfo(skb)->frags;
470 int nr_frags = skb_shinfo(skb)->nr_frags;
471 u64 *mapping = tx_req->mapping;
473 if (skb_headlen(skb)) {
474 priv->tx_sge[0].addr = mapping[0];
475 priv->tx_sge[0].length = skb_headlen(skb);
480 for (i = 0; i < nr_frags; ++i) {
481 priv->tx_sge[i + off].addr = mapping[i + off];
482 priv->tx_sge[i + off].length = frags[i].size;
484 priv->tx_wr.num_sge = nr_frags + off;
485 priv->tx_wr.wr_id = wr_id;
486 priv->tx_wr.wr.ud.remote_qpn = qpn;
487 priv->tx_wr.wr.ud.ah = address;
490 priv->tx_wr.wr.ud.mss = skb_shinfo(skb)->gso_size;
491 priv->tx_wr.wr.ud.header = head;
492 priv->tx_wr.wr.ud.hlen = hlen;
493 priv->tx_wr.opcode = IB_WR_LSO;
495 priv->tx_wr.opcode = IB_WR_SEND;
497 return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr);
500 void ipoib_send(struct net_device *dev, struct sk_buff *skb,
501 struct ipoib_ah *address, u32 qpn)
503 struct ipoib_dev_priv *priv = netdev_priv(dev);
504 struct ipoib_tx_buf *tx_req;
508 if (skb_is_gso(skb)) {
509 hlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
511 if (unlikely(!skb_pull(skb, hlen))) {
512 ipoib_warn(priv, "linear data too small\n");
513 ++dev->stats.tx_dropped;
514 ++dev->stats.tx_errors;
515 dev_kfree_skb_any(skb);
519 if (unlikely(skb->len > priv->mcast_mtu + IPOIB_ENCAP_LEN)) {
520 ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n",
521 skb->len, priv->mcast_mtu + IPOIB_ENCAP_LEN);
522 ++dev->stats.tx_dropped;
523 ++dev->stats.tx_errors;
524 ipoib_cm_skb_too_long(dev, skb, priv->mcast_mtu);
531 ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n",
532 skb->len, address, qpn);
535 * We put the skb into the tx_ring _before_ we call post_send()
536 * because it's entirely possible that the completion handler will
537 * run before we execute anything after the post_send(). That
538 * means we have to make sure everything is properly recorded and
539 * our state is consistent before we call post_send().
541 tx_req = &priv->tx_ring[priv->tx_head & (ipoib_sendq_size - 1)];
543 if (unlikely(ipoib_dma_map_tx(priv->ca, tx_req))) {
544 ++dev->stats.tx_errors;
545 dev_kfree_skb_any(skb);
549 if (skb->ip_summed == CHECKSUM_PARTIAL)
550 priv->tx_wr.send_flags |= IB_SEND_IP_CSUM;
552 priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM;
554 if (unlikely(post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),
555 address->ah, qpn, tx_req, phead, hlen))) {
556 ipoib_warn(priv, "post_send failed\n");
557 ++dev->stats.tx_errors;
558 ipoib_dma_unmap_tx(priv->ca, tx_req);
559 dev_kfree_skb_any(skb);
561 dev->trans_start = jiffies;
563 address->last_send = priv->tx_head;
566 if (++priv->tx_outstanding == ipoib_sendq_size) {
567 ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n");
568 netif_stop_queue(dev);
573 static void __ipoib_reap_ah(struct net_device *dev)
575 struct ipoib_dev_priv *priv = netdev_priv(dev);
576 struct ipoib_ah *ah, *tah;
577 LIST_HEAD(remove_list);
579 spin_lock_irq(&priv->tx_lock);
580 spin_lock(&priv->lock);
581 list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list)
582 if ((int) priv->tx_tail - (int) ah->last_send >= 0) {
584 ib_destroy_ah(ah->ah);
587 spin_unlock(&priv->lock);
588 spin_unlock_irq(&priv->tx_lock);
591 void ipoib_reap_ah(struct work_struct *work)
593 struct ipoib_dev_priv *priv =
594 container_of(work, struct ipoib_dev_priv, ah_reap_task.work);
595 struct net_device *dev = priv->dev;
597 __ipoib_reap_ah(dev);
599 if (!test_bit(IPOIB_STOP_REAPER, &priv->flags))
600 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
601 round_jiffies_relative(HZ));
604 int ipoib_ib_dev_open(struct net_device *dev)
606 struct ipoib_dev_priv *priv = netdev_priv(dev);
609 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &priv->pkey_index)) {
610 ipoib_warn(priv, "P_Key 0x%04x not found\n", priv->pkey);
611 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
614 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
616 ret = ipoib_init_qp(dev);
618 ipoib_warn(priv, "ipoib_init_qp returned %d\n", ret);
622 ret = ipoib_ib_post_receives(dev);
624 ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret);
625 ipoib_ib_dev_stop(dev, 1);
629 ret = ipoib_cm_dev_open(dev);
631 ipoib_warn(priv, "ipoib_cm_dev_open returned %d\n", ret);
632 ipoib_ib_dev_stop(dev, 1);
636 clear_bit(IPOIB_STOP_REAPER, &priv->flags);
637 queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task,
638 round_jiffies_relative(HZ));
640 set_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
645 static void ipoib_pkey_dev_check_presence(struct net_device *dev)
647 struct ipoib_dev_priv *priv = netdev_priv(dev);
650 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &pkey_index))
651 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
653 set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
656 int ipoib_ib_dev_up(struct net_device *dev)
658 struct ipoib_dev_priv *priv = netdev_priv(dev);
660 ipoib_pkey_dev_check_presence(dev);
662 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
663 ipoib_dbg(priv, "PKEY is not assigned.\n");
667 set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
669 return ipoib_mcast_start_thread(dev);
672 int ipoib_ib_dev_down(struct net_device *dev, int flush)
674 struct ipoib_dev_priv *priv = netdev_priv(dev);
676 ipoib_dbg(priv, "downing ib_dev\n");
678 clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
679 netif_carrier_off(dev);
681 /* Shutdown the P_Key thread if still active */
682 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
683 mutex_lock(&pkey_mutex);
684 set_bit(IPOIB_PKEY_STOP, &priv->flags);
685 cancel_delayed_work(&priv->pkey_poll_task);
686 mutex_unlock(&pkey_mutex);
688 flush_workqueue(ipoib_workqueue);
691 ipoib_mcast_stop_thread(dev, flush);
692 ipoib_mcast_dev_flush(dev);
694 ipoib_flush_paths(dev);
699 static int recvs_pending(struct net_device *dev)
701 struct ipoib_dev_priv *priv = netdev_priv(dev);
705 for (i = 0; i < ipoib_recvq_size; ++i)
706 if (priv->rx_ring[i].skb)
712 void ipoib_drain_cq(struct net_device *dev)
714 struct ipoib_dev_priv *priv = netdev_priv(dev);
717 n = ib_poll_cq(priv->cq, IPOIB_NUM_WC, priv->ibwc);
718 for (i = 0; i < n; ++i) {
720 * Convert any successful completions to flush
721 * errors to avoid passing packets up the
722 * stack after bringing the device down.
724 if (priv->ibwc[i].status == IB_WC_SUCCESS)
725 priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
727 if (priv->ibwc[i].wr_id & IPOIB_OP_RECV) {
728 if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
729 ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
731 ipoib_ib_handle_rx_wc(dev, priv->ibwc + i);
733 if (priv->ibwc[i].wr_id & IPOIB_OP_CM)
734 ipoib_cm_handle_tx_wc(dev, priv->ibwc + i);
736 ipoib_ib_handle_tx_wc(dev, priv->ibwc + i);
739 } while (n == IPOIB_NUM_WC);
742 int ipoib_ib_dev_stop(struct net_device *dev, int flush)
744 struct ipoib_dev_priv *priv = netdev_priv(dev);
745 struct ib_qp_attr qp_attr;
747 struct ipoib_tx_buf *tx_req;
750 clear_bit(IPOIB_FLAG_INITIALIZED, &priv->flags);
752 ipoib_cm_dev_stop(dev);
755 * Move our QP to the error state and then reinitialize in
756 * when all work requests have completed or have been flushed.
758 qp_attr.qp_state = IB_QPS_ERR;
759 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
760 ipoib_warn(priv, "Failed to modify QP to ERROR state\n");
762 /* Wait for all sends and receives to complete */
765 while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) {
766 if (time_after(jiffies, begin + 5 * HZ)) {
767 ipoib_warn(priv, "timing out; %d sends %d receives not completed\n",
768 priv->tx_head - priv->tx_tail, recvs_pending(dev));
771 * assume the HW is wedged and just free up
772 * all our pending work requests.
774 while ((int) priv->tx_tail - (int) priv->tx_head < 0) {
775 tx_req = &priv->tx_ring[priv->tx_tail &
776 (ipoib_sendq_size - 1)];
777 ipoib_dma_unmap_tx(priv->ca, tx_req);
778 dev_kfree_skb_any(tx_req->skb);
780 --priv->tx_outstanding;
783 for (i = 0; i < ipoib_recvq_size; ++i) {
784 struct ipoib_rx_buf *rx_req;
786 rx_req = &priv->rx_ring[i];
789 ipoib_ud_dma_unmap_rx(priv,
790 priv->rx_ring[i].mapping);
791 dev_kfree_skb_any(rx_req->skb);
803 ipoib_dbg(priv, "All sends and receives done.\n");
806 qp_attr.qp_state = IB_QPS_RESET;
807 if (ib_modify_qp(priv->qp, &qp_attr, IB_QP_STATE))
808 ipoib_warn(priv, "Failed to modify QP to RESET state\n");
810 /* Wait for all AHs to be reaped */
811 set_bit(IPOIB_STOP_REAPER, &priv->flags);
812 cancel_delayed_work(&priv->ah_reap_task);
814 flush_workqueue(ipoib_workqueue);
818 while (!list_empty(&priv->dead_ahs)) {
819 __ipoib_reap_ah(dev);
821 if (time_after(jiffies, begin + HZ)) {
822 ipoib_warn(priv, "timing out; will leak address handles\n");
829 ib_req_notify_cq(priv->cq, IB_CQ_NEXT_COMP);
834 int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port)
836 struct ipoib_dev_priv *priv = netdev_priv(dev);
842 if (ipoib_transport_dev_init(dev, ca)) {
843 printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name);
847 if (dev->flags & IFF_UP) {
848 if (ipoib_ib_dev_open(dev)) {
849 ipoib_transport_dev_cleanup(dev);
857 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv, int pkey_event)
859 struct ipoib_dev_priv *cpriv;
860 struct net_device *dev = priv->dev;
863 mutex_lock(&priv->vlan_mutex);
866 * Flush any child interfaces too -- they might be up even if
867 * the parent is down.
869 list_for_each_entry(cpriv, &priv->child_intfs, list)
870 __ipoib_ib_dev_flush(cpriv, pkey_event);
872 mutex_unlock(&priv->vlan_mutex);
874 if (!test_bit(IPOIB_FLAG_INITIALIZED, &priv->flags)) {
875 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
879 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
880 ipoib_dbg(priv, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
885 if (ib_find_pkey(priv->ca, priv->port, priv->pkey, &new_index)) {
886 clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags);
887 ipoib_ib_dev_down(dev, 0);
888 ipoib_ib_dev_stop(dev, 0);
889 if (ipoib_pkey_dev_delay_open(dev))
893 /* restart QP only if P_Key index is changed */
894 if (test_and_set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags) &&
895 new_index == priv->pkey_index) {
896 ipoib_dbg(priv, "Not flushing - P_Key index not changed.\n");
899 priv->pkey_index = new_index;
902 ipoib_dbg(priv, "flushing\n");
904 ipoib_ib_dev_down(dev, 0);
907 ipoib_ib_dev_stop(dev, 0);
908 ipoib_ib_dev_open(dev);
912 * The device could have been brought down between the start and when
913 * we get here, don't bring it back up if it's not configured up
915 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) {
916 ipoib_ib_dev_up(dev);
917 ipoib_mcast_restart_task(&priv->restart_task);
921 void ipoib_ib_dev_flush(struct work_struct *work)
923 struct ipoib_dev_priv *priv =
924 container_of(work, struct ipoib_dev_priv, flush_task);
926 ipoib_dbg(priv, "Flushing %s\n", priv->dev->name);
927 __ipoib_ib_dev_flush(priv, 0);
930 void ipoib_pkey_event(struct work_struct *work)
932 struct ipoib_dev_priv *priv =
933 container_of(work, struct ipoib_dev_priv, pkey_event_task);
935 ipoib_dbg(priv, "Flushing %s and restarting its QP\n", priv->dev->name);
936 __ipoib_ib_dev_flush(priv, 1);
939 void ipoib_ib_dev_cleanup(struct net_device *dev)
941 struct ipoib_dev_priv *priv = netdev_priv(dev);
943 ipoib_dbg(priv, "cleaning up ib_dev\n");
945 ipoib_mcast_stop_thread(dev, 1);
946 ipoib_mcast_dev_flush(dev);
948 ipoib_transport_dev_cleanup(dev);
952 * Delayed P_Key Assigment Interim Support
954 * The following is initial implementation of delayed P_Key assigment
955 * mechanism. It is using the same approach implemented for the multicast
956 * group join. The single goal of this implementation is to quickly address
957 * Bug #2507. This implementation will probably be removed when the P_Key
958 * change async notification is available.
961 void ipoib_pkey_poll(struct work_struct *work)
963 struct ipoib_dev_priv *priv =
964 container_of(work, struct ipoib_dev_priv, pkey_poll_task.work);
965 struct net_device *dev = priv->dev;
967 ipoib_pkey_dev_check_presence(dev);
969 if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags))
972 mutex_lock(&pkey_mutex);
973 if (!test_bit(IPOIB_PKEY_STOP, &priv->flags))
974 queue_delayed_work(ipoib_workqueue,
975 &priv->pkey_poll_task,
977 mutex_unlock(&pkey_mutex);
981 int ipoib_pkey_dev_delay_open(struct net_device *dev)
983 struct ipoib_dev_priv *priv = netdev_priv(dev);
985 /* Look for the interface pkey value in the IB Port P_Key table and */
986 /* set the interface pkey assigment flag */
987 ipoib_pkey_dev_check_presence(dev);
989 /* P_Key value not assigned yet - start polling */
990 if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) {
991 mutex_lock(&pkey_mutex);
992 clear_bit(IPOIB_PKEY_STOP, &priv->flags);
993 queue_delayed_work(ipoib_workqueue,
994 &priv->pkey_poll_task,
996 mutex_unlock(&pkey_mutex);