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/moduleparam.h>
38 #include <linux/dma-mapping.h>
39 #include <linux/slab.h>
42 #include <linux/tcp.h>
46 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
47 static int data_debug_level
;
49 module_param(data_debug_level
, int, 0644);
50 MODULE_PARM_DESC(data_debug_level
,
51 "Enable data path debug tracing if > 0");
54 static DEFINE_MUTEX(pkey_mutex
);
56 struct ipoib_ah
*ipoib_create_ah(struct net_device
*dev
,
57 struct ib_pd
*pd
, struct ib_ah_attr
*attr
)
62 ah
= kmalloc(sizeof *ah
, GFP_KERNEL
);
64 return ERR_PTR(-ENOMEM
);
70 vah
= ib_create_ah(pd
, attr
);
73 ah
= (struct ipoib_ah
*)vah
;
76 ipoib_dbg(netdev_priv(dev
), "Created ah %p\n", ah
->ah
);
82 void ipoib_free_ah(struct kref
*kref
)
84 struct ipoib_ah
*ah
= container_of(kref
, struct ipoib_ah
, ref
);
85 struct ipoib_dev_priv
*priv
= netdev_priv(ah
->dev
);
89 spin_lock_irqsave(&priv
->lock
, flags
);
90 list_add_tail(&ah
->list
, &priv
->dead_ahs
);
91 spin_unlock_irqrestore(&priv
->lock
, flags
);
94 static void ipoib_ud_dma_unmap_rx(struct ipoib_dev_priv
*priv
,
95 u64 mapping
[IPOIB_UD_RX_SG
])
97 ib_dma_unmap_single(priv
->ca
, mapping
[0],
98 IPOIB_UD_BUF_SIZE(priv
->max_ib_mtu
),
102 static int ipoib_ib_post_receive(struct net_device
*dev
, int id
)
104 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
105 struct ib_recv_wr
*bad_wr
;
108 priv
->rx_wr
.wr_id
= id
| IPOIB_OP_RECV
;
109 priv
->rx_sge
[0].addr
= priv
->rx_ring
[id
].mapping
[0];
110 priv
->rx_sge
[1].addr
= priv
->rx_ring
[id
].mapping
[1];
113 ret
= ib_post_recv(priv
->qp
, &priv
->rx_wr
, &bad_wr
);
115 ipoib_warn(priv
, "receive failed for buf %d (%d)\n", id
, ret
);
116 ipoib_ud_dma_unmap_rx(priv
, priv
->rx_ring
[id
].mapping
);
117 dev_kfree_skb_any(priv
->rx_ring
[id
].skb
);
118 priv
->rx_ring
[id
].skb
= NULL
;
124 static struct sk_buff
*ipoib_alloc_rx_skb(struct net_device
*dev
, int id
)
126 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
131 buf_size
= IPOIB_UD_BUF_SIZE(priv
->max_ib_mtu
);
133 skb
= dev_alloc_skb(buf_size
+ IPOIB_ENCAP_LEN
);
138 * IB will leave a 40 byte gap for a GRH and IPoIB adds a 4 byte
139 * header. So we need 4 more bytes to get to 48 and align the
140 * IP header to a multiple of 16.
144 mapping
= priv
->rx_ring
[id
].mapping
;
145 mapping
[0] = ib_dma_map_single(priv
->ca
, skb
->data
, buf_size
,
147 if (unlikely(ib_dma_mapping_error(priv
->ca
, mapping
[0])))
150 priv
->rx_ring
[id
].skb
= skb
;
153 dev_kfree_skb_any(skb
);
157 static int ipoib_ib_post_receives(struct net_device
*dev
)
159 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
162 for (i
= 0; i
< ipoib_recvq_size
; ++i
) {
163 if (!ipoib_alloc_rx_skb(dev
, i
)) {
164 ipoib_warn(priv
, "failed to allocate receive buffer %d\n", i
);
167 if (ipoib_ib_post_receive(dev
, i
)) {
168 ipoib_warn(priv
, "ipoib_ib_post_receive failed for buf %d\n", i
);
176 static void ipoib_ib_handle_rx_wc(struct net_device
*dev
, struct ib_wc
*wc
)
178 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
179 unsigned int wr_id
= wc
->wr_id
& ~IPOIB_OP_RECV
;
181 u64 mapping
[IPOIB_UD_RX_SG
];
184 ipoib_dbg_data(priv
, "recv completion: id %d, status: %d\n",
187 if (unlikely(wr_id
>= ipoib_recvq_size
)) {
188 ipoib_warn(priv
, "recv completion event with wrid %d (> %d)\n",
189 wr_id
, ipoib_recvq_size
);
193 skb
= priv
->rx_ring
[wr_id
].skb
;
195 if (unlikely(wc
->status
!= IB_WC_SUCCESS
)) {
196 if (wc
->status
!= IB_WC_WR_FLUSH_ERR
)
197 ipoib_warn(priv
, "failed recv event "
198 "(status=%d, wrid=%d vend_err %x)\n",
199 wc
->status
, wr_id
, wc
->vendor_err
);
200 ipoib_ud_dma_unmap_rx(priv
, priv
->rx_ring
[wr_id
].mapping
);
201 dev_kfree_skb_any(skb
);
202 priv
->rx_ring
[wr_id
].skb
= NULL
;
207 * Drop packets that this interface sent, ie multicast packets
208 * that the HCA has replicated.
210 if (wc
->slid
== priv
->local_lid
&& wc
->src_qp
== priv
->qp
->qp_num
)
213 memcpy(mapping
, priv
->rx_ring
[wr_id
].mapping
,
214 IPOIB_UD_RX_SG
* sizeof *mapping
);
217 * If we can't allocate a new RX buffer, dump
218 * this packet and reuse the old buffer.
220 if (unlikely(!ipoib_alloc_rx_skb(dev
, wr_id
))) {
221 ++dev
->stats
.rx_dropped
;
225 ipoib_dbg_data(priv
, "received %d bytes, SLID 0x%04x\n",
226 wc
->byte_len
, wc
->slid
);
228 ipoib_ud_dma_unmap_rx(priv
, mapping
);
230 skb_put(skb
, wc
->byte_len
);
232 /* First byte of dgid signals multicast when 0xff */
233 dgid
= &((struct ib_grh
*)skb
->data
)->dgid
;
235 if (!(wc
->wc_flags
& IB_WC_GRH
) || dgid
->raw
[0] != 0xff)
236 skb
->pkt_type
= PACKET_HOST
;
237 else if (memcmp(dgid
, dev
->broadcast
+ 4, sizeof(union ib_gid
)) == 0)
238 skb
->pkt_type
= PACKET_BROADCAST
;
240 skb
->pkt_type
= PACKET_MULTICAST
;
242 skb_pull(skb
, IB_GRH_BYTES
);
244 skb
->protocol
= ((struct ipoib_header
*) skb
->data
)->proto
;
245 skb_reset_mac_header(skb
);
246 skb_pull(skb
, IPOIB_ENCAP_LEN
);
248 skb
->truesize
= SKB_TRUESIZE(skb
->len
);
250 ++dev
->stats
.rx_packets
;
251 dev
->stats
.rx_bytes
+= skb
->len
;
254 if ((dev
->features
& NETIF_F_RXCSUM
) &&
255 likely(wc
->wc_flags
& IB_WC_IP_CSUM_OK
))
256 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
258 napi_gro_receive(&priv
->napi
, skb
);
261 if (unlikely(ipoib_ib_post_receive(dev
, wr_id
)))
262 ipoib_warn(priv
, "ipoib_ib_post_receive failed "
263 "for buf %d\n", wr_id
);
266 static int ipoib_dma_map_tx(struct ib_device
*ca
,
267 struct ipoib_tx_buf
*tx_req
)
269 struct sk_buff
*skb
= tx_req
->skb
;
270 u64
*mapping
= tx_req
->mapping
;
274 if (skb_headlen(skb
)) {
275 mapping
[0] = ib_dma_map_single(ca
, skb
->data
, skb_headlen(skb
),
277 if (unlikely(ib_dma_mapping_error(ca
, mapping
[0])))
284 for (i
= 0; i
< skb_shinfo(skb
)->nr_frags
; ++i
) {
285 const skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
286 mapping
[i
+ off
] = ib_dma_map_page(ca
,
288 frag
->page_offset
, skb_frag_size(frag
),
290 if (unlikely(ib_dma_mapping_error(ca
, mapping
[i
+ off
])))
297 const skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
- 1];
299 ib_dma_unmap_page(ca
, mapping
[i
- !off
], skb_frag_size(frag
), DMA_TO_DEVICE
);
303 ib_dma_unmap_single(ca
, mapping
[0], skb_headlen(skb
), DMA_TO_DEVICE
);
308 static void ipoib_dma_unmap_tx(struct ib_device
*ca
,
309 struct ipoib_tx_buf
*tx_req
)
311 struct sk_buff
*skb
= tx_req
->skb
;
312 u64
*mapping
= tx_req
->mapping
;
316 if (skb_headlen(skb
)) {
317 ib_dma_unmap_single(ca
, mapping
[0], skb_headlen(skb
), DMA_TO_DEVICE
);
322 for (i
= 0; i
< skb_shinfo(skb
)->nr_frags
; ++i
) {
323 const skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
325 ib_dma_unmap_page(ca
, mapping
[i
+ off
], skb_frag_size(frag
),
331 * As the result of a completion error the QP Can be transferred to SQE states.
332 * The function checks if the (send)QP is in SQE state and
333 * moves it back to RTS state, that in order to have it functional again.
335 static void ipoib_qp_state_validate_work(struct work_struct
*work
)
337 struct ipoib_qp_state_validate
*qp_work
=
338 container_of(work
, struct ipoib_qp_state_validate
, work
);
340 struct ipoib_dev_priv
*priv
= qp_work
->priv
;
341 struct ib_qp_attr qp_attr
;
342 struct ib_qp_init_attr query_init_attr
;
345 ret
= ib_query_qp(priv
->qp
, &qp_attr
, IB_QP_STATE
, &query_init_attr
);
347 ipoib_warn(priv
, "%s: Failed to query QP ret: %d\n",
351 pr_info("%s: QP: 0x%x is in state: %d\n",
352 __func__
, priv
->qp
->qp_num
, qp_attr
.qp_state
);
354 /* currently support only in SQE->RTS transition*/
355 if (qp_attr
.qp_state
== IB_QPS_SQE
) {
356 qp_attr
.qp_state
= IB_QPS_RTS
;
358 ret
= ib_modify_qp(priv
->qp
, &qp_attr
, IB_QP_STATE
);
360 pr_warn("failed(%d) modify QP:0x%x SQE->RTS\n",
361 ret
, priv
->qp
->qp_num
);
364 pr_info("%s: QP: 0x%x moved from IB_QPS_SQE to IB_QPS_RTS\n",
365 __func__
, priv
->qp
->qp_num
);
367 pr_warn("QP (%d) will stay in state: %d\n",
368 priv
->qp
->qp_num
, qp_attr
.qp_state
);
375 static void ipoib_ib_handle_tx_wc(struct net_device
*dev
, struct ib_wc
*wc
)
377 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
378 unsigned int wr_id
= wc
->wr_id
;
379 struct ipoib_tx_buf
*tx_req
;
381 ipoib_dbg_data(priv
, "send completion: id %d, status: %d\n",
384 if (unlikely(wr_id
>= ipoib_sendq_size
)) {
385 ipoib_warn(priv
, "send completion event with wrid %d (> %d)\n",
386 wr_id
, ipoib_sendq_size
);
390 tx_req
= &priv
->tx_ring
[wr_id
];
392 ipoib_dma_unmap_tx(priv
->ca
, tx_req
);
394 ++dev
->stats
.tx_packets
;
395 dev
->stats
.tx_bytes
+= tx_req
->skb
->len
;
397 dev_kfree_skb_any(tx_req
->skb
);
400 if (unlikely(--priv
->tx_outstanding
== ipoib_sendq_size
>> 1) &&
401 netif_queue_stopped(dev
) &&
402 test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
))
403 netif_wake_queue(dev
);
405 if (wc
->status
!= IB_WC_SUCCESS
&&
406 wc
->status
!= IB_WC_WR_FLUSH_ERR
) {
407 struct ipoib_qp_state_validate
*qp_work
;
408 ipoib_warn(priv
, "failed send event "
409 "(status=%d, wrid=%d vend_err %x)\n",
410 wc
->status
, wr_id
, wc
->vendor_err
);
411 qp_work
= kzalloc(sizeof(*qp_work
), GFP_ATOMIC
);
413 ipoib_warn(priv
, "%s Failed alloc ipoib_qp_state_validate for qp: 0x%x\n",
414 __func__
, priv
->qp
->qp_num
);
418 INIT_WORK(&qp_work
->work
, ipoib_qp_state_validate_work
);
419 qp_work
->priv
= priv
;
420 queue_work(priv
->wq
, &qp_work
->work
);
424 static int poll_tx(struct ipoib_dev_priv
*priv
)
428 n
= ib_poll_cq(priv
->send_cq
, MAX_SEND_CQE
, priv
->send_wc
);
429 for (i
= 0; i
< n
; ++i
)
430 ipoib_ib_handle_tx_wc(priv
->dev
, priv
->send_wc
+ i
);
432 return n
== MAX_SEND_CQE
;
435 int ipoib_poll(struct napi_struct
*napi
, int budget
)
437 struct ipoib_dev_priv
*priv
= container_of(napi
, struct ipoib_dev_priv
, napi
);
438 struct net_device
*dev
= priv
->dev
;
446 while (done
< budget
) {
447 int max
= (budget
- done
);
449 t
= min(IPOIB_NUM_WC
, max
);
450 n
= ib_poll_cq(priv
->recv_cq
, t
, priv
->ibwc
);
452 for (i
= 0; i
< n
; i
++) {
453 struct ib_wc
*wc
= priv
->ibwc
+ i
;
455 if (wc
->wr_id
& IPOIB_OP_RECV
) {
457 if (wc
->wr_id
& IPOIB_OP_CM
)
458 ipoib_cm_handle_rx_wc(dev
, wc
);
460 ipoib_ib_handle_rx_wc(dev
, wc
);
462 ipoib_cm_handle_tx_wc(priv
->dev
, wc
);
471 if (unlikely(ib_req_notify_cq(priv
->recv_cq
,
473 IB_CQ_REPORT_MISSED_EVENTS
)) &&
474 napi_reschedule(napi
))
481 void ipoib_ib_completion(struct ib_cq
*cq
, void *dev_ptr
)
483 struct net_device
*dev
= dev_ptr
;
484 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
486 napi_schedule(&priv
->napi
);
489 static void drain_tx_cq(struct net_device
*dev
)
491 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
494 while (poll_tx(priv
))
497 if (netif_queue_stopped(dev
))
498 mod_timer(&priv
->poll_timer
, jiffies
+ 1);
500 netif_tx_unlock(dev
);
503 void ipoib_send_comp_handler(struct ib_cq
*cq
, void *dev_ptr
)
505 struct ipoib_dev_priv
*priv
= netdev_priv(dev_ptr
);
507 mod_timer(&priv
->poll_timer
, jiffies
);
510 static inline int post_send(struct ipoib_dev_priv
*priv
,
512 struct ib_ah
*address
, u32 qpn
,
513 struct ipoib_tx_buf
*tx_req
,
514 void *head
, int hlen
)
516 struct ib_send_wr
*bad_wr
;
518 struct sk_buff
*skb
= tx_req
->skb
;
519 skb_frag_t
*frags
= skb_shinfo(skb
)->frags
;
520 int nr_frags
= skb_shinfo(skb
)->nr_frags
;
521 u64
*mapping
= tx_req
->mapping
;
523 if (skb_headlen(skb
)) {
524 priv
->tx_sge
[0].addr
= mapping
[0];
525 priv
->tx_sge
[0].length
= skb_headlen(skb
);
530 for (i
= 0; i
< nr_frags
; ++i
) {
531 priv
->tx_sge
[i
+ off
].addr
= mapping
[i
+ off
];
532 priv
->tx_sge
[i
+ off
].length
= skb_frag_size(&frags
[i
]);
534 priv
->tx_wr
.num_sge
= nr_frags
+ off
;
535 priv
->tx_wr
.wr_id
= wr_id
;
536 priv
->tx_wr
.wr
.ud
.remote_qpn
= qpn
;
537 priv
->tx_wr
.wr
.ud
.ah
= address
;
540 priv
->tx_wr
.wr
.ud
.mss
= skb_shinfo(skb
)->gso_size
;
541 priv
->tx_wr
.wr
.ud
.header
= head
;
542 priv
->tx_wr
.wr
.ud
.hlen
= hlen
;
543 priv
->tx_wr
.opcode
= IB_WR_LSO
;
545 priv
->tx_wr
.opcode
= IB_WR_SEND
;
547 return ib_post_send(priv
->qp
, &priv
->tx_wr
, &bad_wr
);
550 void ipoib_send(struct net_device
*dev
, struct sk_buff
*skb
,
551 struct ipoib_ah
*address
, u32 qpn
)
553 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
554 struct ipoib_tx_buf
*tx_req
;
558 if (skb_is_gso(skb
)) {
559 hlen
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
561 if (unlikely(!skb_pull(skb
, hlen
))) {
562 ipoib_warn(priv
, "linear data too small\n");
563 ++dev
->stats
.tx_dropped
;
564 ++dev
->stats
.tx_errors
;
565 dev_kfree_skb_any(skb
);
569 if (unlikely(skb
->len
> priv
->mcast_mtu
+ IPOIB_ENCAP_LEN
)) {
570 ipoib_warn(priv
, "packet len %d (> %d) too long to send, dropping\n",
571 skb
->len
, priv
->mcast_mtu
+ IPOIB_ENCAP_LEN
);
572 ++dev
->stats
.tx_dropped
;
573 ++dev
->stats
.tx_errors
;
574 ipoib_cm_skb_too_long(dev
, skb
, priv
->mcast_mtu
);
581 ipoib_dbg_data(priv
, "sending packet, length=%d address=%p qpn=0x%06x\n",
582 skb
->len
, address
, qpn
);
585 * We put the skb into the tx_ring _before_ we call post_send()
586 * because it's entirely possible that the completion handler will
587 * run before we execute anything after the post_send(). That
588 * means we have to make sure everything is properly recorded and
589 * our state is consistent before we call post_send().
591 tx_req
= &priv
->tx_ring
[priv
->tx_head
& (ipoib_sendq_size
- 1)];
593 if (unlikely(ipoib_dma_map_tx(priv
->ca
, tx_req
))) {
594 ++dev
->stats
.tx_errors
;
595 dev_kfree_skb_any(skb
);
599 if (skb
->ip_summed
== CHECKSUM_PARTIAL
)
600 priv
->tx_wr
.send_flags
|= IB_SEND_IP_CSUM
;
602 priv
->tx_wr
.send_flags
&= ~IB_SEND_IP_CSUM
;
604 if (++priv
->tx_outstanding
== ipoib_sendq_size
) {
605 ipoib_dbg(priv
, "TX ring full, stopping kernel net queue\n");
606 if (ib_req_notify_cq(priv
->send_cq
, IB_CQ_NEXT_COMP
))
607 ipoib_warn(priv
, "request notify on send CQ failed\n");
608 netif_stop_queue(dev
);
614 rc
= post_send(priv
, priv
->tx_head
& (ipoib_sendq_size
- 1),
615 address
->ah
, qpn
, tx_req
, phead
, hlen
);
617 ipoib_warn(priv
, "post_send failed, error %d\n", rc
);
618 ++dev
->stats
.tx_errors
;
619 --priv
->tx_outstanding
;
620 ipoib_dma_unmap_tx(priv
->ca
, tx_req
);
621 dev_kfree_skb_any(skb
);
622 if (netif_queue_stopped(dev
))
623 netif_wake_queue(dev
);
625 dev
->trans_start
= jiffies
;
627 address
->last_send
= priv
->tx_head
;
631 if (unlikely(priv
->tx_outstanding
> MAX_SEND_CQE
))
632 while (poll_tx(priv
))
636 static void __ipoib_reap_ah(struct net_device
*dev
)
638 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
639 struct ipoib_ah
*ah
, *tah
;
640 LIST_HEAD(remove_list
);
643 netif_tx_lock_bh(dev
);
644 spin_lock_irqsave(&priv
->lock
, flags
);
646 list_for_each_entry_safe(ah
, tah
, &priv
->dead_ahs
, list
)
647 if ((int) priv
->tx_tail
- (int) ah
->last_send
>= 0) {
649 ib_destroy_ah(ah
->ah
);
653 spin_unlock_irqrestore(&priv
->lock
, flags
);
654 netif_tx_unlock_bh(dev
);
657 void ipoib_reap_ah(struct work_struct
*work
)
659 struct ipoib_dev_priv
*priv
=
660 container_of(work
, struct ipoib_dev_priv
, ah_reap_task
.work
);
661 struct net_device
*dev
= priv
->dev
;
663 __ipoib_reap_ah(dev
);
665 if (!test_bit(IPOIB_STOP_REAPER
, &priv
->flags
))
666 queue_delayed_work(priv
->wq
, &priv
->ah_reap_task
,
667 round_jiffies_relative(HZ
));
670 static void ipoib_flush_ah(struct net_device
*dev
)
672 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
674 cancel_delayed_work(&priv
->ah_reap_task
);
675 flush_workqueue(priv
->wq
);
676 ipoib_reap_ah(&priv
->ah_reap_task
.work
);
679 static void ipoib_stop_ah(struct net_device
*dev
)
681 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
683 set_bit(IPOIB_STOP_REAPER
, &priv
->flags
);
687 static void ipoib_ib_tx_timer_func(unsigned long ctx
)
689 drain_tx_cq((struct net_device
*)ctx
);
692 int ipoib_ib_dev_open(struct net_device
*dev
)
694 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
697 ipoib_pkey_dev_check_presence(dev
);
699 if (!test_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
)) {
700 ipoib_warn(priv
, "P_Key 0x%04x is %s\n", priv
->pkey
,
701 (!(priv
->pkey
& 0x7fff) ? "Invalid" : "not found"));
705 ret
= ipoib_init_qp(dev
);
707 ipoib_warn(priv
, "ipoib_init_qp returned %d\n", ret
);
711 ret
= ipoib_ib_post_receives(dev
);
713 ipoib_warn(priv
, "ipoib_ib_post_receives returned %d\n", ret
);
717 ret
= ipoib_cm_dev_open(dev
);
719 ipoib_warn(priv
, "ipoib_cm_dev_open returned %d\n", ret
);
723 clear_bit(IPOIB_STOP_REAPER
, &priv
->flags
);
724 queue_delayed_work(priv
->wq
, &priv
->ah_reap_task
,
725 round_jiffies_relative(HZ
));
727 if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED
, &priv
->flags
))
728 napi_enable(&priv
->napi
);
732 if (!test_and_set_bit(IPOIB_FLAG_INITIALIZED
, &priv
->flags
))
733 napi_enable(&priv
->napi
);
734 ipoib_ib_dev_stop(dev
);
738 void ipoib_pkey_dev_check_presence(struct net_device
*dev
)
740 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
742 if (!(priv
->pkey
& 0x7fff) ||
743 ib_find_pkey(priv
->ca
, priv
->port
, priv
->pkey
,
745 clear_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
);
747 set_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
);
750 int ipoib_ib_dev_up(struct net_device
*dev
)
752 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
754 ipoib_pkey_dev_check_presence(dev
);
756 if (!test_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
)) {
757 ipoib_dbg(priv
, "PKEY is not assigned.\n");
761 set_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
);
763 return ipoib_mcast_start_thread(dev
);
766 int ipoib_ib_dev_down(struct net_device
*dev
)
768 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
770 ipoib_dbg(priv
, "downing ib_dev\n");
772 clear_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
);
773 netif_carrier_off(dev
);
775 ipoib_mcast_stop_thread(dev
);
776 ipoib_mcast_dev_flush(dev
);
778 ipoib_flush_paths(dev
);
783 static int recvs_pending(struct net_device
*dev
)
785 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
789 for (i
= 0; i
< ipoib_recvq_size
; ++i
)
790 if (priv
->rx_ring
[i
].skb
)
796 void ipoib_drain_cq(struct net_device
*dev
)
798 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
802 * We call completion handling routines that expect to be
803 * called from the BH-disabled NAPI poll context, so disable
809 n
= ib_poll_cq(priv
->recv_cq
, IPOIB_NUM_WC
, priv
->ibwc
);
810 for (i
= 0; i
< n
; ++i
) {
812 * Convert any successful completions to flush
813 * errors to avoid passing packets up the
814 * stack after bringing the device down.
816 if (priv
->ibwc
[i
].status
== IB_WC_SUCCESS
)
817 priv
->ibwc
[i
].status
= IB_WC_WR_FLUSH_ERR
;
819 if (priv
->ibwc
[i
].wr_id
& IPOIB_OP_RECV
) {
820 if (priv
->ibwc
[i
].wr_id
& IPOIB_OP_CM
)
821 ipoib_cm_handle_rx_wc(dev
, priv
->ibwc
+ i
);
823 ipoib_ib_handle_rx_wc(dev
, priv
->ibwc
+ i
);
825 ipoib_cm_handle_tx_wc(dev
, priv
->ibwc
+ i
);
827 } while (n
== IPOIB_NUM_WC
);
829 while (poll_tx(priv
))
835 int ipoib_ib_dev_stop(struct net_device
*dev
)
837 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
838 struct ib_qp_attr qp_attr
;
840 struct ipoib_tx_buf
*tx_req
;
843 if (test_and_clear_bit(IPOIB_FLAG_INITIALIZED
, &priv
->flags
))
844 napi_disable(&priv
->napi
);
846 ipoib_cm_dev_stop(dev
);
849 * Move our QP to the error state and then reinitialize in
850 * when all work requests have completed or have been flushed.
852 qp_attr
.qp_state
= IB_QPS_ERR
;
853 if (ib_modify_qp(priv
->qp
, &qp_attr
, IB_QP_STATE
))
854 ipoib_warn(priv
, "Failed to modify QP to ERROR state\n");
856 /* Wait for all sends and receives to complete */
859 while (priv
->tx_head
!= priv
->tx_tail
|| recvs_pending(dev
)) {
860 if (time_after(jiffies
, begin
+ 5 * HZ
)) {
861 ipoib_warn(priv
, "timing out; %d sends %d receives not completed\n",
862 priv
->tx_head
- priv
->tx_tail
, recvs_pending(dev
));
865 * assume the HW is wedged and just free up
866 * all our pending work requests.
868 while ((int) priv
->tx_tail
- (int) priv
->tx_head
< 0) {
869 tx_req
= &priv
->tx_ring
[priv
->tx_tail
&
870 (ipoib_sendq_size
- 1)];
871 ipoib_dma_unmap_tx(priv
->ca
, tx_req
);
872 dev_kfree_skb_any(tx_req
->skb
);
874 --priv
->tx_outstanding
;
877 for (i
= 0; i
< ipoib_recvq_size
; ++i
) {
878 struct ipoib_rx_buf
*rx_req
;
880 rx_req
= &priv
->rx_ring
[i
];
883 ipoib_ud_dma_unmap_rx(priv
,
884 priv
->rx_ring
[i
].mapping
);
885 dev_kfree_skb_any(rx_req
->skb
);
897 ipoib_dbg(priv
, "All sends and receives done.\n");
900 del_timer_sync(&priv
->poll_timer
);
901 qp_attr
.qp_state
= IB_QPS_RESET
;
902 if (ib_modify_qp(priv
->qp
, &qp_attr
, IB_QP_STATE
))
903 ipoib_warn(priv
, "Failed to modify QP to RESET state\n");
907 ib_req_notify_cq(priv
->recv_cq
, IB_CQ_NEXT_COMP
);
912 int ipoib_ib_dev_init(struct net_device
*dev
, struct ib_device
*ca
, int port
)
914 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
920 if (ipoib_transport_dev_init(dev
, ca
)) {
921 printk(KERN_WARNING
"%s: ipoib_transport_dev_init failed\n", ca
->name
);
925 setup_timer(&priv
->poll_timer
, ipoib_ib_tx_timer_func
,
926 (unsigned long) dev
);
928 if (dev
->flags
& IFF_UP
) {
929 if (ipoib_ib_dev_open(dev
)) {
930 ipoib_transport_dev_cleanup(dev
);
939 * Takes whatever value which is in pkey index 0 and updates priv->pkey
940 * returns 0 if the pkey value was changed.
942 static inline int update_parent_pkey(struct ipoib_dev_priv
*priv
)
947 prev_pkey
= priv
->pkey
;
948 result
= ib_query_pkey(priv
->ca
, priv
->port
, 0, &priv
->pkey
);
950 ipoib_warn(priv
, "ib_query_pkey port %d failed (ret = %d)\n",
955 priv
->pkey
|= 0x8000;
957 if (prev_pkey
!= priv
->pkey
) {
958 ipoib_dbg(priv
, "pkey changed from 0x%x to 0x%x\n",
959 prev_pkey
, priv
->pkey
);
961 * Update the pkey in the broadcast address, while making sure to set
962 * the full membership bit, so that we join the right broadcast group.
964 priv
->dev
->broadcast
[8] = priv
->pkey
>> 8;
965 priv
->dev
->broadcast
[9] = priv
->pkey
& 0xff;
972 * returns 0 if pkey value was found in a different slot.
974 static inline int update_child_pkey(struct ipoib_dev_priv
*priv
)
976 u16 old_index
= priv
->pkey_index
;
978 priv
->pkey_index
= 0;
979 ipoib_pkey_dev_check_presence(priv
->dev
);
981 if (test_bit(IPOIB_PKEY_ASSIGNED
, &priv
->flags
) &&
982 (old_index
== priv
->pkey_index
))
987 static void __ipoib_ib_dev_flush(struct ipoib_dev_priv
*priv
,
988 enum ipoib_flush_level level
)
990 struct ipoib_dev_priv
*cpriv
;
991 struct net_device
*dev
= priv
->dev
;
994 down_read(&priv
->vlan_rwsem
);
997 * Flush any child interfaces too -- they might be up even if
998 * the parent is down.
1000 list_for_each_entry(cpriv
, &priv
->child_intfs
, list
)
1001 __ipoib_ib_dev_flush(cpriv
, level
);
1003 up_read(&priv
->vlan_rwsem
);
1005 if (!test_bit(IPOIB_FLAG_INITIALIZED
, &priv
->flags
) &&
1006 level
!= IPOIB_FLUSH_HEAVY
) {
1007 ipoib_dbg(priv
, "Not flushing - IPOIB_FLAG_INITIALIZED not set.\n");
1011 if (!test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
)) {
1012 /* interface is down. update pkey and leave. */
1013 if (level
== IPOIB_FLUSH_HEAVY
) {
1014 if (!test_bit(IPOIB_FLAG_SUBINTERFACE
, &priv
->flags
))
1015 update_parent_pkey(priv
);
1017 update_child_pkey(priv
);
1019 ipoib_dbg(priv
, "Not flushing - IPOIB_FLAG_ADMIN_UP not set.\n");
1023 if (level
== IPOIB_FLUSH_HEAVY
) {
1024 /* child devices chase their origin pkey value, while non-child
1025 * (parent) devices should always takes what present in pkey index 0
1027 if (test_bit(IPOIB_FLAG_SUBINTERFACE
, &priv
->flags
)) {
1028 result
= update_child_pkey(priv
);
1030 /* restart QP only if P_Key index is changed */
1031 ipoib_dbg(priv
, "Not flushing - P_Key index not changed.\n");
1036 result
= update_parent_pkey(priv
);
1037 /* restart QP only if P_Key value changed */
1039 ipoib_dbg(priv
, "Not flushing - P_Key value not changed.\n");
1045 if (level
== IPOIB_FLUSH_LIGHT
) {
1046 ipoib_mark_paths_invalid(dev
);
1047 ipoib_mcast_dev_flush(dev
);
1048 ipoib_flush_ah(dev
);
1051 if (level
>= IPOIB_FLUSH_NORMAL
)
1052 ipoib_ib_dev_down(dev
);
1054 if (level
== IPOIB_FLUSH_HEAVY
) {
1055 if (test_bit(IPOIB_FLAG_INITIALIZED
, &priv
->flags
))
1056 ipoib_ib_dev_stop(dev
);
1057 if (ipoib_ib_dev_open(dev
) != 0)
1059 if (netif_queue_stopped(dev
))
1060 netif_start_queue(dev
);
1064 * The device could have been brought down between the start and when
1065 * we get here, don't bring it back up if it's not configured up
1067 if (test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
)) {
1068 if (level
>= IPOIB_FLUSH_NORMAL
)
1069 ipoib_ib_dev_up(dev
);
1070 ipoib_mcast_restart_task(&priv
->restart_task
);
1074 void ipoib_ib_dev_flush_light(struct work_struct
*work
)
1076 struct ipoib_dev_priv
*priv
=
1077 container_of(work
, struct ipoib_dev_priv
, flush_light
);
1079 __ipoib_ib_dev_flush(priv
, IPOIB_FLUSH_LIGHT
);
1082 void ipoib_ib_dev_flush_normal(struct work_struct
*work
)
1084 struct ipoib_dev_priv
*priv
=
1085 container_of(work
, struct ipoib_dev_priv
, flush_normal
);
1087 __ipoib_ib_dev_flush(priv
, IPOIB_FLUSH_NORMAL
);
1090 void ipoib_ib_dev_flush_heavy(struct work_struct
*work
)
1092 struct ipoib_dev_priv
*priv
=
1093 container_of(work
, struct ipoib_dev_priv
, flush_heavy
);
1095 __ipoib_ib_dev_flush(priv
, IPOIB_FLUSH_HEAVY
);
1098 void ipoib_ib_dev_cleanup(struct net_device
*dev
)
1100 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
1102 ipoib_dbg(priv
, "cleaning up ib_dev\n");
1104 * We must make sure there are no more (path) completions
1105 * that may wish to touch priv fields that are no longer valid
1107 ipoib_flush_paths(dev
);
1109 ipoib_mcast_stop_thread(dev
);
1110 ipoib_mcast_dev_flush(dev
);
1113 * All of our ah references aren't free until after
1114 * ipoib_mcast_dev_flush(), ipoib_flush_paths, and
1115 * the neighbor garbage collection is stopped and reaped.
1116 * That should all be done now, so make a final ah flush.
1120 ipoib_transport_dev_cleanup(dev
);