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
36 #include <linux/delay.h>
37 #include <linux/dma-mapping.h>
39 #include <rdma/ib_cache.h>
41 #include <linux/tcp.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 void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv
*priv
,
91 u64 mapping
[IPOIB_UD_RX_SG
])
93 if (ipoib_ud_need_sg(priv
->max_ib_mtu
)) {
94 ib_dma_unmap_single(priv
->ca
, mapping
[0], IPOIB_UD_HEAD_SIZE
,
96 ib_dma_unmap_page(priv
->ca
, mapping
[1], PAGE_SIZE
,
99 ib_dma_unmap_single(priv
->ca
, mapping
[0],
100 IPOIB_UD_BUF_SIZE(priv
->max_ib_mtu
),
104 static void ipoib_ud_skb_put_frags(struct ipoib_dev_priv
*priv
,
108 if (ipoib_ud_need_sg(priv
->max_ib_mtu
)) {
109 skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[0];
112 * There is only two buffers needed for max_payload = 4K,
113 * first buf size is IPOIB_UD_HEAD_SIZE
115 skb
->tail
+= IPOIB_UD_HEAD_SIZE
;
118 size
= length
- IPOIB_UD_HEAD_SIZE
;
121 skb
->data_len
+= size
;
122 skb
->truesize
+= size
;
124 skb_put(skb
, length
);
128 static int ipoib_ib_post_receive(struct net_device
*dev
, int id
)
130 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
131 struct ib_recv_wr
*bad_wr
;
134 priv
->rx_wr
.wr_id
= id
| IPOIB_OP_RECV
;
135 priv
->rx_sge
[0].addr
= priv
->rx_ring
[id
].mapping
[0];
136 priv
->rx_sge
[1].addr
= priv
->rx_ring
[id
].mapping
[1];
139 ret
= ib_post_recv(priv
->qp
, &priv
->rx_wr
, &bad_wr
);
141 ipoib_warn(priv
, "receive failed for buf %d (%d)\n", id
, ret
);
142 ipoib_ud_dma_unmap_rx(priv
, priv
->rx_ring
[id
].mapping
);
143 dev_kfree_skb_any(priv
->rx_ring
[id
].skb
);
144 priv
->rx_ring
[id
].skb
= NULL
;
150 static struct sk_buff
*ipoib_alloc_rx_skb(struct net_device
*dev
, int id
)
152 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
157 if (ipoib_ud_need_sg(priv
->max_ib_mtu
))
158 buf_size
= IPOIB_UD_HEAD_SIZE
;
160 buf_size
= IPOIB_UD_BUF_SIZE(priv
->max_ib_mtu
);
162 skb
= dev_alloc_skb(buf_size
+ 4);
167 * IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte
168 * header. So we need 4 more bytes to get to 48 and align the
169 * IP header to a multiple of 16.
173 mapping
= priv
->rx_ring
[id
].mapping
;
174 mapping
[0] = ib_dma_map_single(priv
->ca
, skb
->data
, buf_size
,
176 if (unlikely(ib_dma_mapping_error(priv
->ca
, mapping
[0])))
179 if (ipoib_ud_need_sg(priv
->max_ib_mtu
)) {
180 struct page
*page
= alloc_page(GFP_ATOMIC
);
183 skb_fill_page_desc(skb
, 0, page
, 0, PAGE_SIZE
);
185 ib_dma_map_page(priv
->ca
, skb_shinfo(skb
)->frags
[0].page
,
186 0, PAGE_SIZE
, DMA_FROM_DEVICE
);
187 if (unlikely(ib_dma_mapping_error(priv
->ca
, mapping
[1])))
191 priv
->rx_ring
[id
].skb
= skb
;
195 ib_dma_unmap_single(priv
->ca
, mapping
[0], buf_size
, DMA_FROM_DEVICE
);
197 dev_kfree_skb_any(skb
);
201 static int ipoib_ib_post_receives(struct net_device
*dev
)
203 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
206 for (i
= 0; i
< ipoib_recvq_size
; ++i
) {
207 if (!ipoib_alloc_rx_skb(dev
, i
)) {
208 ipoib_warn(priv
, "failed to allocate receive buffer %d\n", i
);
211 if (ipoib_ib_post_receive(dev
, i
)) {
212 ipoib_warn(priv
, "ipoib_ib_post_receive failed for buf %d\n", i
);
220 static void ipoib_ib_handle_rx_wc(struct net_device
*dev
, struct ib_wc
*wc
)
222 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
223 unsigned int wr_id
= wc
->wr_id
& ~IPOIB_OP_RECV
;
225 u64 mapping
[IPOIB_UD_RX_SG
];
227 ipoib_dbg_data(priv
, "recv completion: id %d, status: %d\n",
230 if (unlikely(wr_id
>= ipoib_recvq_size
)) {
231 ipoib_warn(priv
, "recv completion event with wrid %d (> %d)\n",
232 wr_id
, ipoib_recvq_size
);
236 skb
= priv
->rx_ring
[wr_id
].skb
;
238 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
239 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
240 ipoib_warn(priv
, "failed recv event "
241 "(status=%d, wrid=%d vend_err %x)\n",
242 wc
->status
, wr_id
, wc
->vendor_err
);
243 ipoib_ud_dma_unmap_rx(priv
, priv
->rx_ring
[wr_id
].mapping
);
244 dev_kfree_skb_any(skb
);
245 priv
->rx_ring
[wr_id
].skb
= NULL
;
250 * Drop packets that this interface sent, ie multicast packets
251 * that the HCA has replicated.
253 if (wc
->slid
== priv
->local_lid
&& wc
->src_qp
== priv
->qp
->qp_num
)
256 memcpy(mapping
, priv
->rx_ring
[wr_id
].mapping
,
257 IPOIB_UD_RX_SG
* sizeof *mapping
);
260 * If we can't allocate a new RX buffer, dump
261 * this packet and reuse the old buffer.
263 if (unlikely(!ipoib_alloc_rx_skb(dev
, wr_id
))) {
264 ++dev
->stats
.rx_dropped
;
268 ipoib_dbg_data(priv
, "received %d bytes, SLID 0x%04x\n",
269 wc
->byte_len
, wc
->slid
);
271 ipoib_ud_dma_unmap_rx(priv
, mapping
);
272 ipoib_ud_skb_put_frags(priv
, skb
, wc
->byte_len
);
274 skb_pull(skb
, IB_GRH_BYTES
);
276 skb
->protocol
= ((struct ipoib_header
*) skb
->data
)->proto
;
277 skb_reset_mac_header(skb
);
278 skb_pull(skb
, IPOIB_ENCAP_LEN
);
280 ++dev
->stats
.rx_packets
;
281 dev
->stats
.rx_bytes
+= skb
->len
;
284 /* XXX get correct PACKET_ type here */
285 skb
->pkt_type
= PACKET_HOST
;
287 if (test_bit(IPOIB_FLAG_CSUM
, &priv
->flags
) && likely(wc
->csum_ok
))
288 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
290 if (dev
->features
& NETIF_F_LRO
)
291 lro_receive_skb(&priv
->lro
.lro_mgr
, skb
, NULL
);
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 if (dev
->features
& NETIF_F_LRO
)
446 lro_flush_all(&priv
->lro
.lro_mgr
);
449 if (unlikely(ib_req_notify_cq(priv
->recv_cq
,
451 IB_CQ_REPORT_MISSED_EVENTS
)) &&
452 napi_reschedule(napi
))
459 void ipoib_ib_completion(struct ib_cq
*cq
, void *dev_ptr
)
461 struct net_device
*dev
= dev_ptr
;
462 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
464 napi_schedule(&priv
->napi
);
467 static void drain_tx_cq(struct net_device
*dev
)
469 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
472 while (poll_tx(priv
))
475 if (netif_queue_stopped(dev
))
476 mod_timer(&priv
->poll_timer
, jiffies
+ 1);
478 netif_tx_unlock(dev
);
481 void ipoib_send_comp_handler(struct ib_cq
*cq
, void *dev_ptr
)
483 struct ipoib_dev_priv
*priv
= netdev_priv(dev_ptr
);
485 mod_timer(&priv
->poll_timer
, jiffies
);
488 static inline int post_send(struct ipoib_dev_priv
*priv
,
490 struct ib_ah
*address
, u32 qpn
,
491 struct ipoib_tx_buf
*tx_req
,
492 void *head
, int hlen
)
494 struct ib_send_wr
*bad_wr
;
496 struct sk_buff
*skb
= tx_req
->skb
;
497 skb_frag_t
*frags
= skb_shinfo(skb
)->frags
;
498 int nr_frags
= skb_shinfo(skb
)->nr_frags
;
499 u64
*mapping
= tx_req
->mapping
;
501 if (skb_headlen(skb
)) {
502 priv
->tx_sge
[0].addr
= mapping
[0];
503 priv
->tx_sge
[0].length
= skb_headlen(skb
);
508 for (i
= 0; i
< nr_frags
; ++i
) {
509 priv
->tx_sge
[i
+ off
].addr
= mapping
[i
+ off
];
510 priv
->tx_sge
[i
+ off
].length
= frags
[i
].size
;
512 priv
->tx_wr
.num_sge
= nr_frags
+ off
;
513 priv
->tx_wr
.wr_id
= wr_id
;
514 priv
->tx_wr
.wr
.ud
.remote_qpn
= qpn
;
515 priv
->tx_wr
.wr
.ud
.ah
= address
;
518 priv
->tx_wr
.wr
.ud
.mss
= skb_shinfo(skb
)->gso_size
;
519 priv
->tx_wr
.wr
.ud
.header
= head
;
520 priv
->tx_wr
.wr
.ud
.hlen
= hlen
;
521 priv
->tx_wr
.opcode
= IB_WR_LSO
;
523 priv
->tx_wr
.opcode
= IB_WR_SEND
;
525 return ib_post_send(priv
->qp
, &priv
->tx_wr
, &bad_wr
);
528 void ipoib_send(struct net_device
*dev
, struct sk_buff
*skb
,
529 struct ipoib_ah
*address
, u32 qpn
)
531 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
532 struct ipoib_tx_buf
*tx_req
;
536 if (skb_is_gso(skb
)) {
537 hlen
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
539 if (unlikely(!skb_pull(skb
, hlen
))) {
540 ipoib_warn(priv
, "linear data too small\n");
541 ++dev
->stats
.tx_dropped
;
542 ++dev
->stats
.tx_errors
;
543 dev_kfree_skb_any(skb
);
547 if (unlikely(skb
->len
> priv
->mcast_mtu
+ IPOIB_ENCAP_LEN
)) {
548 ipoib_warn(priv
, "packet len %d (> %d) too long to send, dropping\n",
549 skb
->len
, priv
->mcast_mtu
+ IPOIB_ENCAP_LEN
);
550 ++dev
->stats
.tx_dropped
;
551 ++dev
->stats
.tx_errors
;
552 ipoib_cm_skb_too_long(dev
, skb
, priv
->mcast_mtu
);
559 ipoib_dbg_data(priv
, "sending packet, length=%d address=%p qpn=0x%06x\n",
560 skb
->len
, address
, qpn
);
563 * We put the skb into the tx_ring _before_ we call post_send()
564 * because it's entirely possible that the completion handler will
565 * run before we execute anything after the post_send(). That
566 * means we have to make sure everything is properly recorded and
567 * our state is consistent before we call post_send().
569 tx_req
= &priv
->tx_ring
[priv
->tx_head
& (ipoib_sendq_size
- 1)];
571 if (unlikely(ipoib_dma_map_tx(priv
->ca
, tx_req
))) {
572 ++dev
->stats
.tx_errors
;
573 dev_kfree_skb_any(skb
);
577 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
578 priv
->tx_wr
.send_flags
|= IB_SEND_IP_CSUM
;
580 priv
->tx_wr
.send_flags
&= ~IB_SEND_IP_CSUM
;
582 if (++priv
->tx_outstanding
== ipoib_sendq_size
) {
583 ipoib_dbg(priv
, "TX ring full, stopping kernel net queue\n");
584 if (ib_req_notify_cq(priv
->send_cq
, IB_CQ_NEXT_COMP
))
585 ipoib_warn(priv
, "request notify on send CQ failed\n");
586 netif_stop_queue(dev
);
589 if (unlikely(post_send(priv
, priv
->tx_head
& (ipoib_sendq_size
- 1),
590 address
->ah
, qpn
, tx_req
, phead
, hlen
))) {
591 ipoib_warn(priv
, "post_send failed\n");
592 ++dev
->stats
.tx_errors
;
593 --priv
->tx_outstanding
;
594 ipoib_dma_unmap_tx(priv
->ca
, tx_req
);
595 dev_kfree_skb_any(skb
);
596 if (netif_queue_stopped(dev
))
597 netif_wake_queue(dev
);
599 dev
->trans_start
= jiffies
;
601 address
->last_send
= priv
->tx_head
;
607 if (unlikely(priv
->tx_outstanding
> MAX_SEND_CQE
))
608 while (poll_tx(priv
))
612 static void __ipoib_reap_ah(struct net_device
*dev
)
614 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
615 struct ipoib_ah
*ah
, *tah
;
616 LIST_HEAD(remove_list
);
619 netif_tx_lock_bh(dev
);
620 spin_lock_irqsave(&priv
->lock
, flags
);
622 list_for_each_entry_safe(ah
, tah
, &priv
->dead_ahs
, list
)
623 if ((int) priv
->tx_tail
- (int) ah
->last_send
>= 0) {
625 ib_destroy_ah(ah
->ah
);
629 spin_unlock_irqrestore(&priv
->lock
, flags
);
630 netif_tx_unlock_bh(dev
);
633 void ipoib_reap_ah(struct work_struct
*work
)
635 struct ipoib_dev_priv
*priv
=
636 container_of(work
, struct ipoib_dev_priv
, ah_reap_task
.work
);
637 struct net_device
*dev
= priv
->dev
;
639 __ipoib_reap_ah(dev
);
641 if (!test_bit(IPOIB_STOP_REAPER
, &priv
->flags
))
642 queue_delayed_work(ipoib_workqueue
, &priv
->ah_reap_task
,
643 round_jiffies_relative(HZ
));
646 static void ipoib_ib_tx_timer_func(unsigned long ctx
)
648 drain_tx_cq((struct net_device
*)ctx
);
651 int ipoib_ib_dev_open(struct net_device
*dev
)
653 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
656 if (ib_find_pkey(priv
->ca
, priv
->port
, priv
->pkey
, &priv
->pkey_index
)) {
657 ipoib_warn(priv
, "P_Key 0x%04x not found\n", priv
->pkey
);
658 clear_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
);
661 set_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
);
663 ret
= ipoib_init_qp(dev
);
665 ipoib_warn(priv
, "ipoib_init_qp returned %d\n", ret
);
669 ret
= ipoib_ib_post_receives(dev
);
671 ipoib_warn(priv
, "ipoib_ib_post_receives returned %d\n", ret
);
672 ipoib_ib_dev_stop(dev
, 1);
676 ret
= ipoib_cm_dev_open(dev
);
678 ipoib_warn(priv
, "ipoib_cm_dev_open returned %d\n", ret
);
679 ipoib_ib_dev_stop(dev
, 1);
683 clear_bit(IPOIB_STOP_REAPER
, &priv
->flags
);
684 queue_delayed_work(ipoib_workqueue
, &priv
->ah_reap_task
,
685 round_jiffies_relative(HZ
));
687 if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED
, &priv
->flags
))
688 napi_enable(&priv
->napi
);
693 static void ipoib_pkey_dev_check_presence(struct net_device
*dev
)
695 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
698 if (ib_find_pkey(priv
->ca
, priv
->port
, priv
->pkey
, &pkey_index
))
699 clear_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
);
701 set_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
);
704 int ipoib_ib_dev_up(struct net_device
*dev
)
706 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
708 ipoib_pkey_dev_check_presence(dev
);
710 if (!test_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
)) {
711 ipoib_dbg(priv
, "PKEY is not assigned.\n");
715 set_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
);
717 return ipoib_mcast_start_thread(dev
);
720 int ipoib_ib_dev_down(struct net_device
*dev
, int flush
)
722 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
724 ipoib_dbg(priv
, "downing ib_dev\n");
726 clear_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
);
727 netif_carrier_off(dev
);
729 /* Shutdown the P_Key thread if still active */
730 if (!test_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
)) {
731 mutex_lock(&pkey_mutex
);
732 set_bit(IPOIB_PKEY_STOP
, &priv
->flags
);
733 cancel_delayed_work(&priv
->pkey_poll_task
);
734 mutex_unlock(&pkey_mutex
);
736 flush_workqueue(ipoib_workqueue
);
739 ipoib_mcast_stop_thread(dev
, flush
);
740 ipoib_mcast_dev_flush(dev
);
742 ipoib_flush_paths(dev
);
747 static int recvs_pending(struct net_device
*dev
)
749 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
753 for (i
= 0; i
< ipoib_recvq_size
; ++i
)
754 if (priv
->rx_ring
[i
].skb
)
760 void ipoib_drain_cq(struct net_device
*dev
)
762 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
766 * We call completion handling routines that expect to be
767 * called from the BH-disabled NAPI poll context, so disable
773 n
= ib_poll_cq(priv
->recv_cq
, IPOIB_NUM_WC
, priv
->ibwc
);
774 for (i
= 0; i
< n
; ++i
) {
776 * Convert any successful completions to flush
777 * errors to avoid passing packets up the
778 * stack after bringing the device down.
780 if (priv
->ibwc
[i
].status
== IB_WC_SUCCESS
)
781 priv
->ibwc
[i
].status
= IB_WC_WR_FLUSH_ERR
;
783 if (priv
->ibwc
[i
].wr_id
& IPOIB_OP_RECV
) {
784 if (priv
->ibwc
[i
].wr_id
& IPOIB_OP_CM
)
785 ipoib_cm_handle_rx_wc(dev
, priv
->ibwc
+ i
);
787 ipoib_ib_handle_rx_wc(dev
, priv
->ibwc
+ i
);
789 ipoib_cm_handle_tx_wc(dev
, priv
->ibwc
+ i
);
791 } while (n
== IPOIB_NUM_WC
);
793 while (poll_tx(priv
))
799 int ipoib_ib_dev_stop(struct net_device
*dev
, int flush
)
801 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
802 struct ib_qp_attr qp_attr
;
804 struct ipoib_tx_buf
*tx_req
;
807 if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED
, &priv
->flags
))
808 napi_disable(&priv
->napi
);
810 ipoib_cm_dev_stop(dev
);
813 * Move our QP to the error state and then reinitialize in
814 * when all work requests have completed or have been flushed.
816 qp_attr
.qp_state
= IB_QPS_ERR
;
817 if (ib_modify_qp(priv
->qp
, &qp_attr
, IB_QP_STATE
))
818 ipoib_warn(priv
, "Failed to modify QP to ERROR state\n");
820 /* Wait for all sends and receives to complete */
823 while (priv
->tx_head
!= priv
->tx_tail
|| recvs_pending(dev
)) {
824 if (time_after(jiffies
, begin
+ 5 * HZ
)) {
825 ipoib_warn(priv
, "timing out; %d sends %d receives not completed\n",
826 priv
->tx_head
- priv
->tx_tail
, recvs_pending(dev
));
829 * assume the HW is wedged and just free up
830 * all our pending work requests.
832 while ((int) priv
->tx_tail
- (int) priv
->tx_head
< 0) {
833 tx_req
= &priv
->tx_ring
[priv
->tx_tail
&
834 (ipoib_sendq_size
- 1)];
835 ipoib_dma_unmap_tx(priv
->ca
, tx_req
);
836 dev_kfree_skb_any(tx_req
->skb
);
838 --priv
->tx_outstanding
;
841 for (i
= 0; i
< ipoib_recvq_size
; ++i
) {
842 struct ipoib_rx_buf
*rx_req
;
844 rx_req
= &priv
->rx_ring
[i
];
847 ipoib_ud_dma_unmap_rx(priv
,
848 priv
->rx_ring
[i
].mapping
);
849 dev_kfree_skb_any(rx_req
->skb
);
861 ipoib_dbg(priv
, "All sends and receives done.\n");
864 del_timer_sync(&priv
->poll_timer
);
865 qp_attr
.qp_state
= IB_QPS_RESET
;
866 if (ib_modify_qp(priv
->qp
, &qp_attr
, IB_QP_STATE
))
867 ipoib_warn(priv
, "Failed to modify QP to RESET state\n");
869 /* Wait for all AHs to be reaped */
870 set_bit(IPOIB_STOP_REAPER
, &priv
->flags
);
871 cancel_delayed_work(&priv
->ah_reap_task
);
873 flush_workqueue(ipoib_workqueue
);
877 while (!list_empty(&priv
->dead_ahs
)) {
878 __ipoib_reap_ah(dev
);
880 if (time_after(jiffies
, begin
+ HZ
)) {
881 ipoib_warn(priv
, "timing out; will leak address handles\n");
888 ib_req_notify_cq(priv
->recv_cq
, IB_CQ_NEXT_COMP
);
893 int ipoib_ib_dev_init(struct net_device
*dev
, struct ib_device
*ca
, int port
)
895 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
901 if (ipoib_transport_dev_init(dev
, ca
)) {
902 printk(KERN_WARNING
"%s: ipoib_transport_dev_init failed\n", ca
->name
);
906 setup_timer(&priv
->poll_timer
, ipoib_ib_tx_timer_func
,
907 (unsigned long) dev
);
909 if (dev
->flags
& IFF_UP
) {
910 if (ipoib_ib_dev_open(dev
)) {
911 ipoib_transport_dev_cleanup(dev
);
919 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv
*priv
,
920 enum ipoib_flush_level level
)
922 struct ipoib_dev_priv
*cpriv
;
923 struct net_device
*dev
= priv
->dev
;
926 mutex_lock(&priv
->vlan_mutex
);
929 * Flush any child interfaces too -- they might be up even if
930 * the parent is down.
932 list_for_each_entry(cpriv
, &priv
->child_intfs
, list
)
933 __ipoib_ib_dev_flush(cpriv
, level
);
935 mutex_unlock(&priv
->vlan_mutex
);
937 if (!test_bit(IPOIB_FLAG_INITIALIZED
, &priv
->flags
)) {
938 ipoib_dbg(priv
, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
942 if (!test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
)) {
943 ipoib_dbg(priv
, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
947 if (level
== IPOIB_FLUSH_HEAVY
) {
948 if (ib_find_pkey(priv
->ca
, priv
->port
, priv
->pkey
, &new_index
)) {
949 clear_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
);
950 ipoib_ib_dev_down(dev
, 0);
951 ipoib_ib_dev_stop(dev
, 0);
952 if (ipoib_pkey_dev_delay_open(dev
))
956 /* restart QP only if P_Key index is changed */
957 if (test_and_set_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
) &&
958 new_index
== priv
->pkey_index
) {
959 ipoib_dbg(priv
, "Not flushing - P_Key index not changed.\n");
962 priv
->pkey_index
= new_index
;
965 if (level
== IPOIB_FLUSH_LIGHT
) {
966 ipoib_mark_paths_invalid(dev
);
967 ipoib_mcast_dev_flush(dev
);
970 if (level
>= IPOIB_FLUSH_NORMAL
)
971 ipoib_ib_dev_down(dev
, 0);
973 if (level
== IPOIB_FLUSH_HEAVY
) {
974 ipoib_ib_dev_stop(dev
, 0);
975 ipoib_ib_dev_open(dev
);
979 * The device could have been brought down between the start and when
980 * we get here, don't bring it back up if it's not configured up
982 if (test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
)) {
983 if (level
>= IPOIB_FLUSH_NORMAL
)
984 ipoib_ib_dev_up(dev
);
985 ipoib_mcast_restart_task(&priv
->restart_task
);
989 void ipoib_ib_dev_flush_light(struct work_struct
*work
)
991 struct ipoib_dev_priv
*priv
=
992 container_of(work
, struct ipoib_dev_priv
, flush_light
);
994 __ipoib_ib_dev_flush(priv
, IPOIB_FLUSH_LIGHT
);
997 void ipoib_ib_dev_flush_normal(struct work_struct
*work
)
999 struct ipoib_dev_priv
*priv
=
1000 container_of(work
, struct ipoib_dev_priv
, flush_normal
);
1002 __ipoib_ib_dev_flush(priv
, IPOIB_FLUSH_NORMAL
);
1005 void ipoib_ib_dev_flush_heavy(struct work_struct
*work
)
1007 struct ipoib_dev_priv
*priv
=
1008 container_of(work
, struct ipoib_dev_priv
, flush_heavy
);
1010 __ipoib_ib_dev_flush(priv
, IPOIB_FLUSH_HEAVY
);
1013 void ipoib_ib_dev_cleanup(struct net_device
*dev
)
1015 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1017 ipoib_dbg(priv
, "cleaning up ib_dev\n");
1019 ipoib_mcast_stop_thread(dev
, 1);
1020 ipoib_mcast_dev_flush(dev
);
1022 ipoib_transport_dev_cleanup(dev
);
1026 * Delayed P_Key Assigment Interim Support
1028 * The following is initial implementation of delayed P_Key assigment
1029 * mechanism. It is using the same approach implemented for the multicast
1030 * group join. The single goal of this implementation is to quickly address
1031 * Bug #2507. This implementation will probably be removed when the P_Key
1032 * change async notification is available.
1035 void ipoib_pkey_poll(struct work_struct
*work
)
1037 struct ipoib_dev_priv
*priv
=
1038 container_of(work
, struct ipoib_dev_priv
, pkey_poll_task
.work
);
1039 struct net_device
*dev
= priv
->dev
;
1041 ipoib_pkey_dev_check_presence(dev
);
1043 if (test_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
))
1046 mutex_lock(&pkey_mutex
);
1047 if (!test_bit(IPOIB_PKEY_STOP
, &priv
->flags
))
1048 queue_delayed_work(ipoib_workqueue
,
1049 &priv
->pkey_poll_task
,
1051 mutex_unlock(&pkey_mutex
);
1055 int ipoib_pkey_dev_delay_open(struct net_device
*dev
)
1057 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1059 /* Look for the interface pkey value in the IB Port P_Key table and */
1060 /* set the interface pkey assigment flag */
1061 ipoib_pkey_dev_check_presence(dev
);
1063 /* P_Key value not assigned yet - start polling */
1064 if (!test_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
)) {
1065 mutex_lock(&pkey_mutex
);
1066 clear_bit(IPOIB_PKEY_STOP
, &priv
->flags
);
1067 queue_delayed_work(ipoib_workqueue
,
1068 &priv
->pkey_poll_task
,
1070 mutex_unlock(&pkey_mutex
);