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
;
368 ipoib_dbg_data(priv
, "send completion: id %d, status: %d\n",
371 if (unlikely(wr_id
>= ipoib_sendq_size
)) {
372 ipoib_warn(priv
, "send completion event with wrid %d (> %d)\n",
373 wr_id
, ipoib_sendq_size
);
377 tx_req
= &priv
->tx_ring
[wr_id
];
379 ipoib_dma_unmap_tx(priv
->ca
, tx_req
);
381 ++dev
->stats
.tx_packets
;
382 dev
->stats
.tx_bytes
+= tx_req
->skb
->len
;
384 dev_kfree_skb_any(tx_req
->skb
);
387 if (unlikely(--priv
->tx_outstanding
== ipoib_sendq_size
>> 1) &&
388 netif_queue_stopped(dev
) &&
389 test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
))
390 netif_wake_queue(dev
);
392 if (wc
->status
!= IB_WC_SUCCESS
&&
393 wc
->status
!= IB_WC_WR_FLUSH_ERR
)
394 ipoib_warn(priv
, "failed send event "
395 "(status=%d, wrid=%d vend_err %x)\n",
396 wc
->status
, wr_id
, wc
->vendor_err
);
399 static int poll_tx(struct ipoib_dev_priv
*priv
)
403 n
= ib_poll_cq(priv
->send_cq
, MAX_SEND_CQE
, priv
->send_wc
);
404 for (i
= 0; i
< n
; ++i
)
405 ipoib_ib_handle_tx_wc(priv
->dev
, priv
->send_wc
+ i
);
407 return n
== MAX_SEND_CQE
;
410 int ipoib_poll(struct napi_struct
*napi
, int budget
)
412 struct ipoib_dev_priv
*priv
= container_of(napi
, struct ipoib_dev_priv
, napi
);
413 struct net_device
*dev
= priv
->dev
;
421 while (done
< budget
) {
422 int max
= (budget
- done
);
424 t
= min(IPOIB_NUM_WC
, max
);
425 n
= ib_poll_cq(priv
->recv_cq
, t
, priv
->ibwc
);
427 for (i
= 0; i
< n
; i
++) {
428 struct ib_wc
*wc
= priv
->ibwc
+ i
;
430 if (wc
->wr_id
& IPOIB_OP_RECV
) {
432 if (wc
->wr_id
& IPOIB_OP_CM
)
433 ipoib_cm_handle_rx_wc(dev
, wc
);
435 ipoib_ib_handle_rx_wc(dev
, wc
);
437 ipoib_cm_handle_tx_wc(priv
->dev
, wc
);
445 netif_rx_complete(dev
, napi
);
446 if (unlikely(ib_req_notify_cq(priv
->recv_cq
,
448 IB_CQ_REPORT_MISSED_EVENTS
)) &&
449 netif_rx_reschedule(dev
, napi
))
456 void ipoib_ib_completion(struct ib_cq
*cq
, void *dev_ptr
)
458 struct net_device
*dev
= dev_ptr
;
459 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
461 netif_rx_schedule(dev
, &priv
->napi
);
464 static void drain_tx_cq(struct net_device
*dev
)
466 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
469 spin_lock_irqsave(&priv
->tx_lock
, flags
);
470 while (poll_tx(priv
))
473 if (netif_queue_stopped(dev
))
474 mod_timer(&priv
->poll_timer
, jiffies
+ 1);
476 spin_unlock_irqrestore(&priv
->tx_lock
, flags
);
479 void ipoib_send_comp_handler(struct ib_cq
*cq
, void *dev_ptr
)
481 drain_tx_cq((struct net_device
*)dev_ptr
);
484 static inline int post_send(struct ipoib_dev_priv
*priv
,
486 struct ib_ah
*address
, u32 qpn
,
487 struct ipoib_tx_buf
*tx_req
,
488 void *head
, int hlen
)
490 struct ib_send_wr
*bad_wr
;
492 struct sk_buff
*skb
= tx_req
->skb
;
493 skb_frag_t
*frags
= skb_shinfo(skb
)->frags
;
494 int nr_frags
= skb_shinfo(skb
)->nr_frags
;
495 u64
*mapping
= tx_req
->mapping
;
497 if (skb_headlen(skb
)) {
498 priv
->tx_sge
[0].addr
= mapping
[0];
499 priv
->tx_sge
[0].length
= skb_headlen(skb
);
504 for (i
= 0; i
< nr_frags
; ++i
) {
505 priv
->tx_sge
[i
+ off
].addr
= mapping
[i
+ off
];
506 priv
->tx_sge
[i
+ off
].length
= frags
[i
].size
;
508 priv
->tx_wr
.num_sge
= nr_frags
+ off
;
509 priv
->tx_wr
.wr_id
= wr_id
;
510 priv
->tx_wr
.wr
.ud
.remote_qpn
= qpn
;
511 priv
->tx_wr
.wr
.ud
.ah
= address
;
514 priv
->tx_wr
.wr
.ud
.mss
= skb_shinfo(skb
)->gso_size
;
515 priv
->tx_wr
.wr
.ud
.header
= head
;
516 priv
->tx_wr
.wr
.ud
.hlen
= hlen
;
517 priv
->tx_wr
.opcode
= IB_WR_LSO
;
519 priv
->tx_wr
.opcode
= IB_WR_SEND
;
521 return ib_post_send(priv
->qp
, &priv
->tx_wr
, &bad_wr
);
524 void ipoib_send(struct net_device
*dev
, struct sk_buff
*skb
,
525 struct ipoib_ah
*address
, u32 qpn
)
527 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
528 struct ipoib_tx_buf
*tx_req
;
532 if (skb_is_gso(skb
)) {
533 hlen
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
535 if (unlikely(!skb_pull(skb
, hlen
))) {
536 ipoib_warn(priv
, "linear data too small\n");
537 ++dev
->stats
.tx_dropped
;
538 ++dev
->stats
.tx_errors
;
539 dev_kfree_skb_any(skb
);
543 if (unlikely(skb
->len
> priv
->mcast_mtu
+ IPOIB_ENCAP_LEN
)) {
544 ipoib_warn(priv
, "packet len %d (> %d) too long to send, dropping\n",
545 skb
->len
, priv
->mcast_mtu
+ IPOIB_ENCAP_LEN
);
546 ++dev
->stats
.tx_dropped
;
547 ++dev
->stats
.tx_errors
;
548 ipoib_cm_skb_too_long(dev
, skb
, priv
->mcast_mtu
);
555 ipoib_dbg_data(priv
, "sending packet, length=%d address=%p qpn=0x%06x\n",
556 skb
->len
, address
, qpn
);
559 * We put the skb into the tx_ring _before_ we call post_send()
560 * because it's entirely possible that the completion handler will
561 * run before we execute anything after the post_send(). That
562 * means we have to make sure everything is properly recorded and
563 * our state is consistent before we call post_send().
565 tx_req
= &priv
->tx_ring
[priv
->tx_head
& (ipoib_sendq_size
- 1)];
567 if (unlikely(ipoib_dma_map_tx(priv
->ca
, tx_req
))) {
568 ++dev
->stats
.tx_errors
;
569 dev_kfree_skb_any(skb
);
573 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
574 priv
->tx_wr
.send_flags
|= IB_SEND_IP_CSUM
;
576 priv
->tx_wr
.send_flags
&= ~IB_SEND_IP_CSUM
;
578 if (++priv
->tx_outstanding
== ipoib_sendq_size
) {
579 ipoib_dbg(priv
, "TX ring full, stopping kernel net queue\n");
580 if (ib_req_notify_cq(priv
->send_cq
, IB_CQ_NEXT_COMP
))
581 ipoib_warn(priv
, "request notify on send CQ failed\n");
582 netif_stop_queue(dev
);
585 if (unlikely(post_send(priv
, priv
->tx_head
& (ipoib_sendq_size
- 1),
586 address
->ah
, qpn
, tx_req
, phead
, hlen
))) {
587 ipoib_warn(priv
, "post_send failed\n");
588 ++dev
->stats
.tx_errors
;
589 --priv
->tx_outstanding
;
590 ipoib_dma_unmap_tx(priv
->ca
, tx_req
);
591 dev_kfree_skb_any(skb
);
592 if (netif_queue_stopped(dev
))
593 netif_wake_queue(dev
);
595 dev
->trans_start
= jiffies
;
597 address
->last_send
= priv
->tx_head
;
603 if (unlikely(priv
->tx_outstanding
> MAX_SEND_CQE
))
604 while (poll_tx(priv
))
608 static void __ipoib_reap_ah(struct net_device
*dev
)
610 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
611 struct ipoib_ah
*ah
, *tah
;
612 LIST_HEAD(remove_list
);
614 spin_lock_irq(&priv
->tx_lock
);
615 spin_lock(&priv
->lock
);
616 list_for_each_entry_safe(ah
, tah
, &priv
->dead_ahs
, list
)
617 if ((int) priv
->tx_tail
- (int) ah
->last_send
>= 0) {
619 ib_destroy_ah(ah
->ah
);
622 spin_unlock(&priv
->lock
);
623 spin_unlock_irq(&priv
->tx_lock
);
626 void ipoib_reap_ah(struct work_struct
*work
)
628 struct ipoib_dev_priv
*priv
=
629 container_of(work
, struct ipoib_dev_priv
, ah_reap_task
.work
);
630 struct net_device
*dev
= priv
->dev
;
632 __ipoib_reap_ah(dev
);
634 if (!test_bit(IPOIB_STOP_REAPER
, &priv
->flags
))
635 queue_delayed_work(ipoib_workqueue
, &priv
->ah_reap_task
,
636 round_jiffies_relative(HZ
));
639 static void ipoib_ib_tx_timer_func(unsigned long ctx
)
641 drain_tx_cq((struct net_device
*)ctx
);
644 int ipoib_ib_dev_open(struct net_device
*dev
)
646 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
649 if (ib_find_pkey(priv
->ca
, priv
->port
, priv
->pkey
, &priv
->pkey_index
)) {
650 ipoib_warn(priv
, "P_Key 0x%04x not found\n", priv
->pkey
);
651 clear_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
);
654 set_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
);
656 ret
= ipoib_init_qp(dev
);
658 ipoib_warn(priv
, "ipoib_init_qp returned %d\n", ret
);
662 ret
= ipoib_ib_post_receives(dev
);
664 ipoib_warn(priv
, "ipoib_ib_post_receives returned %d\n", ret
);
665 ipoib_ib_dev_stop(dev
, 1);
669 ret
= ipoib_cm_dev_open(dev
);
671 ipoib_warn(priv
, "ipoib_cm_dev_open returned %d\n", ret
);
672 ipoib_ib_dev_stop(dev
, 1);
676 clear_bit(IPOIB_STOP_REAPER
, &priv
->flags
);
677 queue_delayed_work(ipoib_workqueue
, &priv
->ah_reap_task
,
678 round_jiffies_relative(HZ
));
680 init_timer(&priv
->poll_timer
);
681 priv
->poll_timer
.function
= ipoib_ib_tx_timer_func
;
682 priv
->poll_timer
.data
= (unsigned long)dev
;
684 set_bit(IPOIB_FLAG_INITIALIZED
, &priv
->flags
);
689 static void ipoib_pkey_dev_check_presence(struct net_device
*dev
)
691 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
694 if (ib_find_pkey(priv
->ca
, priv
->port
, priv
->pkey
, &pkey_index
))
695 clear_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
);
697 set_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
);
700 int ipoib_ib_dev_up(struct net_device
*dev
)
702 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
704 ipoib_pkey_dev_check_presence(dev
);
706 if (!test_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
)) {
707 ipoib_dbg(priv
, "PKEY is not assigned.\n");
711 set_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
);
713 return ipoib_mcast_start_thread(dev
);
716 int ipoib_ib_dev_down(struct net_device
*dev
, int flush
)
718 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
720 ipoib_dbg(priv
, "downing ib_dev\n");
722 clear_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
);
723 netif_carrier_off(dev
);
725 /* Shutdown the P_Key thread if still active */
726 if (!test_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
)) {
727 mutex_lock(&pkey_mutex
);
728 set_bit(IPOIB_PKEY_STOP
, &priv
->flags
);
729 cancel_delayed_work(&priv
->pkey_poll_task
);
730 mutex_unlock(&pkey_mutex
);
732 flush_workqueue(ipoib_workqueue
);
735 ipoib_mcast_stop_thread(dev
, flush
);
736 ipoib_mcast_dev_flush(dev
);
738 ipoib_flush_paths(dev
);
743 static int recvs_pending(struct net_device
*dev
)
745 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
749 for (i
= 0; i
< ipoib_recvq_size
; ++i
)
750 if (priv
->rx_ring
[i
].skb
)
756 void ipoib_drain_cq(struct net_device
*dev
)
758 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
761 n
= ib_poll_cq(priv
->recv_cq
, IPOIB_NUM_WC
, priv
->ibwc
);
762 for (i
= 0; i
< n
; ++i
) {
764 * Convert any successful completions to flush
765 * errors to avoid passing packets up the
766 * stack after bringing the device down.
768 if (priv
->ibwc
[i
].status
== IB_WC_SUCCESS
)
769 priv
->ibwc
[i
].status
= IB_WC_WR_FLUSH_ERR
;
771 if (priv
->ibwc
[i
].wr_id
& IPOIB_OP_RECV
) {
772 if (priv
->ibwc
[i
].wr_id
& IPOIB_OP_CM
)
773 ipoib_cm_handle_rx_wc(dev
, priv
->ibwc
+ i
);
775 ipoib_ib_handle_rx_wc(dev
, priv
->ibwc
+ i
);
777 ipoib_cm_handle_tx_wc(dev
, priv
->ibwc
+ i
);
779 } while (n
== IPOIB_NUM_WC
);
781 while (poll_tx(priv
))
785 int ipoib_ib_dev_stop(struct net_device
*dev
, int flush
)
787 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
788 struct ib_qp_attr qp_attr
;
790 struct ipoib_tx_buf
*tx_req
;
793 clear_bit(IPOIB_FLAG_INITIALIZED
, &priv
->flags
);
795 ipoib_cm_dev_stop(dev
);
798 * Move our QP to the error state and then reinitialize in
799 * when all work requests have completed or have been flushed.
801 qp_attr
.qp_state
= IB_QPS_ERR
;
802 if (ib_modify_qp(priv
->qp
, &qp_attr
, IB_QP_STATE
))
803 ipoib_warn(priv
, "Failed to modify QP to ERROR state\n");
805 /* Wait for all sends and receives to complete */
808 while (priv
->tx_head
!= priv
->tx_tail
|| recvs_pending(dev
)) {
809 if (time_after(jiffies
, begin
+ 5 * HZ
)) {
810 ipoib_warn(priv
, "timing out; %d sends %d receives not completed\n",
811 priv
->tx_head
- priv
->tx_tail
, recvs_pending(dev
));
814 * assume the HW is wedged and just free up
815 * all our pending work requests.
817 while ((int) priv
->tx_tail
- (int) priv
->tx_head
< 0) {
818 tx_req
= &priv
->tx_ring
[priv
->tx_tail
&
819 (ipoib_sendq_size
- 1)];
820 ipoib_dma_unmap_tx(priv
->ca
, tx_req
);
821 dev_kfree_skb_any(tx_req
->skb
);
823 --priv
->tx_outstanding
;
826 for (i
= 0; i
< ipoib_recvq_size
; ++i
) {
827 struct ipoib_rx_buf
*rx_req
;
829 rx_req
= &priv
->rx_ring
[i
];
832 ipoib_ud_dma_unmap_rx(priv
,
833 priv
->rx_ring
[i
].mapping
);
834 dev_kfree_skb_any(rx_req
->skb
);
846 ipoib_dbg(priv
, "All sends and receives done.\n");
849 del_timer_sync(&priv
->poll_timer
);
850 qp_attr
.qp_state
= IB_QPS_RESET
;
851 if (ib_modify_qp(priv
->qp
, &qp_attr
, IB_QP_STATE
))
852 ipoib_warn(priv
, "Failed to modify QP to RESET state\n");
854 /* Wait for all AHs to be reaped */
855 set_bit(IPOIB_STOP_REAPER
, &priv
->flags
);
856 cancel_delayed_work(&priv
->ah_reap_task
);
858 flush_workqueue(ipoib_workqueue
);
862 while (!list_empty(&priv
->dead_ahs
)) {
863 __ipoib_reap_ah(dev
);
865 if (time_after(jiffies
, begin
+ HZ
)) {
866 ipoib_warn(priv
, "timing out; will leak address handles\n");
873 ib_req_notify_cq(priv
->recv_cq
, IB_CQ_NEXT_COMP
);
878 int ipoib_ib_dev_init(struct net_device
*dev
, struct ib_device
*ca
, int port
)
880 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
886 if (ipoib_transport_dev_init(dev
, ca
)) {
887 printk(KERN_WARNING
"%s: ipoib_transport_dev_init failed\n", ca
->name
);
891 if (dev
->flags
& IFF_UP
) {
892 if (ipoib_ib_dev_open(dev
)) {
893 ipoib_transport_dev_cleanup(dev
);
901 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv
*priv
, int pkey_event
)
903 struct ipoib_dev_priv
*cpriv
;
904 struct net_device
*dev
= priv
->dev
;
907 mutex_lock(&priv
->vlan_mutex
);
910 * Flush any child interfaces too -- they might be up even if
911 * the parent is down.
913 list_for_each_entry(cpriv
, &priv
->child_intfs
, list
)
914 __ipoib_ib_dev_flush(cpriv
, pkey_event
);
916 mutex_unlock(&priv
->vlan_mutex
);
918 if (!test_bit(IPOIB_FLAG_INITIALIZED
, &priv
->flags
)) {
919 ipoib_dbg(priv
, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
923 if (!test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
)) {
924 ipoib_dbg(priv
, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
929 if (ib_find_pkey(priv
->ca
, priv
->port
, priv
->pkey
, &new_index
)) {
930 clear_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
);
931 ipoib_ib_dev_down(dev
, 0);
932 ipoib_ib_dev_stop(dev
, 0);
933 if (ipoib_pkey_dev_delay_open(dev
))
937 /* restart QP only if P_Key index is changed */
938 if (test_and_set_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
) &&
939 new_index
== priv
->pkey_index
) {
940 ipoib_dbg(priv
, "Not flushing - P_Key index not changed.\n");
943 priv
->pkey_index
= new_index
;
946 ipoib_dbg(priv
, "flushing\n");
948 ipoib_ib_dev_down(dev
, 0);
951 ipoib_ib_dev_stop(dev
, 0);
952 ipoib_ib_dev_open(dev
);
956 * The device could have been brought down between the start and when
957 * we get here, don't bring it back up if it's not configured up
959 if (test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
)) {
960 ipoib_ib_dev_up(dev
);
961 ipoib_mcast_restart_task(&priv
->restart_task
);
965 void ipoib_ib_dev_flush(struct work_struct
*work
)
967 struct ipoib_dev_priv
*priv
=
968 container_of(work
, struct ipoib_dev_priv
, flush_task
);
970 ipoib_dbg(priv
, "Flushing %s\n", priv
->dev
->name
);
971 __ipoib_ib_dev_flush(priv
, 0);
974 void ipoib_pkey_event(struct work_struct
*work
)
976 struct ipoib_dev_priv
*priv
=
977 container_of(work
, struct ipoib_dev_priv
, pkey_event_task
);
979 ipoib_dbg(priv
, "Flushing %s and restarting its QP\n", priv
->dev
->name
);
980 __ipoib_ib_dev_flush(priv
, 1);
983 void ipoib_ib_dev_cleanup(struct net_device
*dev
)
985 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
987 ipoib_dbg(priv
, "cleaning up ib_dev\n");
989 ipoib_mcast_stop_thread(dev
, 1);
990 ipoib_mcast_dev_flush(dev
);
992 ipoib_transport_dev_cleanup(dev
);
996 * Delayed P_Key Assigment Interim Support
998 * The following is initial implementation of delayed P_Key assigment
999 * mechanism. It is using the same approach implemented for the multicast
1000 * group join. The single goal of this implementation is to quickly address
1001 * Bug #2507. This implementation will probably be removed when the P_Key
1002 * change async notification is available.
1005 void ipoib_pkey_poll(struct work_struct
*work
)
1007 struct ipoib_dev_priv
*priv
=
1008 container_of(work
, struct ipoib_dev_priv
, pkey_poll_task
.work
);
1009 struct net_device
*dev
= priv
->dev
;
1011 ipoib_pkey_dev_check_presence(dev
);
1013 if (test_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
))
1016 mutex_lock(&pkey_mutex
);
1017 if (!test_bit(IPOIB_PKEY_STOP
, &priv
->flags
))
1018 queue_delayed_work(ipoib_workqueue
,
1019 &priv
->pkey_poll_task
,
1021 mutex_unlock(&pkey_mutex
);
1025 int ipoib_pkey_dev_delay_open(struct net_device
*dev
)
1027 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1029 /* Look for the interface pkey value in the IB Port P_Key table and */
1030 /* set the interface pkey assigment flag */
1031 ipoib_pkey_dev_check_presence(dev
);
1033 /* P_Key value not assigned yet - start polling */
1034 if (!test_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
)) {
1035 mutex_lock(&pkey_mutex
);
1036 clear_bit(IPOIB_PKEY_STOP
, &priv
->flags
);
1037 queue_delayed_work(ipoib_workqueue
,
1038 &priv
->pkey_poll_task
,
1040 mutex_unlock(&pkey_mutex
);