summaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/ulp/ipoib/ipoib.h
blob: 73e808c1e6adacfdfdc61a9bc85d9a350e7edaaa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
/*
 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef _IPOIB_H
#define _IPOIB_H

#include <linux/list.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/workqueue.h>
#include <linux/kref.h>
#include <linux/if_infiniband.h>
#include <linux/mutex.h>

#include <net/neighbour.h>
#include <net/sch_generic.h>

#include <linux/atomic.h>

#include <rdma/ib_verbs.h>
#include <rdma/ib_pack.h>
#include <rdma/ib_sa.h>
#include <linux/sched.h>
/* constants */

enum ipoib_flush_level {
	IPOIB_FLUSH_LIGHT,
	IPOIB_FLUSH_NORMAL,
	IPOIB_FLUSH_HEAVY
};

enum {
	IPOIB_ENCAP_LEN		  = 4,
	IPOIB_PSEUDO_LEN	  = 20,
	IPOIB_HARD_LEN		  = IPOIB_ENCAP_LEN + IPOIB_PSEUDO_LEN,

	IPOIB_UD_HEAD_SIZE	  = IB_GRH_BYTES + IPOIB_ENCAP_LEN,
	IPOIB_UD_RX_SG		  = 2, /* max buffer needed for 4K mtu */

	IPOIB_CM_MTU		  = 0x10000 - 0x10, /* padding to align header to 16 */
	IPOIB_CM_BUF_SIZE	  = IPOIB_CM_MTU  + IPOIB_ENCAP_LEN,
	IPOIB_CM_HEAD_SIZE	  = IPOIB_CM_BUF_SIZE % PAGE_SIZE,
	IPOIB_CM_RX_SG		  = ALIGN(IPOIB_CM_BUF_SIZE, PAGE_SIZE) / PAGE_SIZE,
	IPOIB_RX_RING_SIZE	  = 256,
	IPOIB_TX_RING_SIZE	  = 128,
	IPOIB_MAX_QUEUE_SIZE	  = 8192,
	IPOIB_MIN_QUEUE_SIZE	  = 2,
	IPOIB_CM_MAX_CONN_QP	  = 4096,

	IPOIB_NUM_WC		  = 4,

	IPOIB_MAX_PATH_REC_QUEUE  = 3,
	IPOIB_MAX_MCAST_QUEUE	  = 64,

	IPOIB_FLAG_OPER_UP	  = 0,
	IPOIB_FLAG_INITIALIZED	  = 1,
	IPOIB_FLAG_ADMIN_UP	  = 2,
	IPOIB_PKEY_ASSIGNED	  = 3,
	IPOIB_FLAG_SUBINTERFACE	  = 5,
	IPOIB_STOP_REAPER	  = 7,
	IPOIB_FLAG_ADMIN_CM	  = 9,
	IPOIB_FLAG_UMCAST	  = 10,
	IPOIB_NEIGH_TBL_FLUSH	  = 12,
	IPOIB_FLAG_DEV_ADDR_SET	  = 13,
	IPOIB_FLAG_DEV_ADDR_CTRL  = 14,

	IPOIB_MAX_BACKOFF_SECONDS = 16,

	IPOIB_MCAST_FLAG_FOUND	  = 0,	/* used in set_multicast_list */
	IPOIB_MCAST_FLAG_SENDONLY = 1,
	/*
	 * For IPOIB_MCAST_FLAG_BUSY
	 * When set, in flight join and mcast->mc is unreliable
	 * When clear and mcast->mc IS_ERR_OR_NULL, need to restart or
	 *   haven't started yet
	 * When clear and mcast->mc is valid pointer, join was successful
	 */
	IPOIB_MCAST_FLAG_BUSY	  = 2,
	IPOIB_MCAST_FLAG_ATTACHED = 3,

	MAX_SEND_CQE		  = 64,
	IPOIB_CM_COPYBREAK	  = 256,

	IPOIB_NON_CHILD		  = 0,
	IPOIB_LEGACY_CHILD	  = 1,
	IPOIB_RTNL_CHILD	  = 2,
};

#define	IPOIB_OP_RECV   (1ul << 31)
#ifdef CONFIG_INFINIBAND_IPOIB_CM
#define	IPOIB_OP_CM     (1ul << 30)
#else
#define	IPOIB_OP_CM     (0)
#endif

#define IPOIB_QPN_MASK ((__force u32) cpu_to_be32(0xFFFFFF))

/* structs */

struct ipoib_header {
	__be16	proto;
	u16	reserved;
};

struct ipoib_pseudo_header {
	u8	hwaddr[INFINIBAND_ALEN];
};

static inline void skb_add_pseudo_hdr(struct sk_buff *skb)
{
	char *data = skb_push(skb, IPOIB_PSEUDO_LEN);

	/*
	 * only the ipoib header is present now, make room for a dummy
	 * pseudo header and set skb field accordingly
	 */
	memset(data, 0, IPOIB_PSEUDO_LEN);
	skb_reset_mac_header(skb);
	skb_pull(skb, IPOIB_HARD_LEN);
}

static inline struct ipoib_dev_priv *ipoib_priv(const struct net_device *dev)
{
	struct rdma_netdev *rn = netdev_priv(dev);

	return rn->clnt_priv;
}

/* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
struct ipoib_mcast {
	struct ib_sa_mcmember_rec mcmember;
	struct ib_sa_multicast	 *mc;
	struct ipoib_ah		 *ah;

	struct rb_node    rb_node;
	struct list_head  list;

	unsigned long created;
	unsigned long backoff;
	unsigned long delay_until;

	unsigned long flags;
	unsigned char logcount;

	struct list_head  neigh_list;

	struct sk_buff_head pkt_queue;

	struct net_device *dev;
	struct completion done;
};

struct ipoib_rx_buf {
	struct sk_buff *skb;
	u64		mapping[IPOIB_UD_RX_SG];
};

struct ipoib_tx_buf {
	struct sk_buff *skb;
	u64		mapping[MAX_SKB_FRAGS + 1];
};

struct ib_cm_id;

struct ipoib_cm_data {
	__be32 qpn; /* High byte MUST be ignored on receive */
	__be32 mtu;
};

/*
 * Quoting 10.3.1 Queue Pair and EE Context States:
 *
 * Note, for QPs that are associated with an SRQ, the Consumer should take the
 * QP through the Error State before invoking a Destroy QP or a Modify QP to the
 * Reset State.  The Consumer may invoke the Destroy QP without first performing
 * a Modify QP to the Error State and waiting for the Affiliated Asynchronous
 * Last WQE Reached Event. However, if the Consumer does not wait for the
 * Affiliated Asynchronous Last WQE Reached Event, then WQE and Data Segment
 * leakage may occur. Therefore, it is good programming practice to tear down a
 * QP that is associated with an SRQ by using the following process:
 *
 * - Put the QP in the Error State
 * - Wait for the Affiliated Asynchronous Last WQE Reached Event;
 * - either:
 *       drain the CQ by invoking the Poll CQ verb and either wait for CQ
 *       to be empty or the number of Poll CQ operations has exceeded
 *       CQ capacity size;
 * - or
 *       post another WR that completes on the same CQ and wait for this
 *       WR to return as a WC;
 * - and then invoke a Destroy QP or Reset QP.
 *
 * We use the second option and wait for a completion on the
 * same CQ before destroying QPs attached to our SRQ.
 */

enum ipoib_cm_state {
	IPOIB_CM_RX_LIVE,
	IPOIB_CM_RX_ERROR, /* Ignored by stale task */
	IPOIB_CM_RX_FLUSH  /* Last WQE Reached event observed */
};

struct ipoib_cm_rx {
	struct ib_cm_id	       *id;
	struct ib_qp	       *qp;
	struct ipoib_cm_rx_buf *rx_ring;
	struct list_head	list;
	struct net_device      *dev;
	unsigned long		jiffies;
	enum ipoib_cm_state	state;
	int			recv_count;
};

struct ipoib_cm_tx {
	struct ib_cm_id	    *id;
	struct ib_qp	    *qp;
	struct list_head     list;
	struct net_device   *dev;
	struct ipoib_neigh  *neigh;
	struct ipoib_tx_buf *tx_ring;
	unsigned int	     tx_head;
	unsigned int	     tx_tail;
	unsigned long	     flags;
	u32		     mtu;
	unsigned int         max_send_sge;
};

struct ipoib_cm_rx_buf {
	struct sk_buff *skb;
	u64 mapping[IPOIB_CM_RX_SG];
};

struct ipoib_cm_dev_priv {
	struct ib_srq	       *srq;
	struct ipoib_cm_rx_buf *srq_ring;
	struct ib_cm_id	       *id;
	struct list_head	passive_ids;   /* state: LIVE */
	struct list_head	rx_error_list; /* state: ERROR */
	struct list_head	rx_flush_list; /* state: FLUSH, drain not started */
	struct list_head	rx_drain_list; /* state: FLUSH, drain started */
	struct list_head	rx_reap_list;  /* state: FLUSH, drain done */
	struct work_struct      start_task;
	struct work_struct      reap_task;
	struct work_struct      skb_task;
	struct work_struct      rx_reap_task;
	struct delayed_work     stale_task;
	struct sk_buff_head     skb_queue;
	struct list_head	start_list;
	struct list_head	reap_list;
	struct ib_wc		ibwc[IPOIB_NUM_WC];
	struct ib_sge		rx_sge[IPOIB_CM_RX_SG];
	struct ib_recv_wr       rx_wr;
	int			nonsrq_conn_qp;
	int			max_cm_mtu;
	int			num_frags;
};

struct ipoib_ethtool_st {
	u16     coalesce_usecs;
	u16     max_coalesced_frames;
};

struct ipoib_neigh_table;

struct ipoib_neigh_hash {
	struct ipoib_neigh_table       *ntbl;
	struct ipoib_neigh __rcu      **buckets;
	struct rcu_head			rcu;
	u32				mask;
	u32				size;
};

struct ipoib_neigh_table {
	struct ipoib_neigh_hash __rcu  *htbl;
	atomic_t			entries;
	struct completion		flushed;
	struct completion		deleted;
};

struct ipoib_qp_state_validate {
	struct work_struct work;
	struct ipoib_dev_priv   *priv;
};

/*
 * Device private locking: network stack tx_lock protects members used
 * in TX fast path, lock protects everything else.  lock nests inside
 * of tx_lock (ie tx_lock must be acquired first if needed).
 */
struct ipoib_dev_priv {
	spinlock_t lock;

	struct net_device *dev;
	void (*next_priv_destructor)(struct net_device *dev);

	struct napi_struct send_napi;
	struct napi_struct recv_napi;

	unsigned long flags;

	/*
	 * This protects access to the child_intfs list.
	 * To READ from child_intfs the RTNL or vlan_rwsem read side must be
	 * held.  To WRITE RTNL and the vlan_rwsem write side must be held (in
	 * that order) This lock exists because we have a few contexts where
	 * we need the child_intfs, but do not want to grab the RTNL.
	 */
	struct rw_semaphore vlan_rwsem;
	struct mutex mcast_mutex;

	struct rb_root  path_tree;
	struct list_head path_list;

	struct ipoib_neigh_table ntbl;

	struct ipoib_mcast *broadcast;
	struct list_head multicast_list;
	struct rb_root multicast_tree;

	struct workqueue_struct *wq;
	struct delayed_work mcast_task;
	struct work_struct carrier_on_task;
	struct work_struct flush_light;
	struct work_struct flush_normal;
	struct work_struct flush_heavy;
	struct work_struct restart_task;
	struct delayed_work ah_reap_task;
	struct delayed_work neigh_reap_task;
	struct ib_device *ca;
	u8		  port;
	u16		  pkey;
	u16		  pkey_index;
	struct ib_pd	 *pd;
	struct ib_cq	 *recv_cq;
	struct ib_cq	 *send_cq;
	struct ib_qp	 *qp;
	u32		  qkey;

	union ib_gid local_gid;
	u32	     local_lid;

	unsigned int admin_mtu;
	unsigned int mcast_mtu;
	unsigned int max_ib_mtu;

	struct ipoib_rx_buf *rx_ring;

	struct ipoib_tx_buf *tx_ring;
	unsigned int	     tx_head;
	unsigned int	     tx_tail;
	struct ib_sge	     tx_sge[MAX_SKB_FRAGS + 1];
	struct ib_ud_wr      tx_wr;
	struct ib_wc	     send_wc[MAX_SEND_CQE];

	struct ib_recv_wr    rx_wr;
	struct ib_sge	     rx_sge[IPOIB_UD_RX_SG];

	struct ib_wc ibwc[IPOIB_NUM_WC];

	struct list_head dead_ahs;

	struct ib_event_handler event_handler;

	struct net_device *parent;
	struct list_head child_intfs;
	struct list_head list;
	int    child_type;

#ifdef CONFIG_INFINIBAND_IPOIB_CM
	struct ipoib_cm_dev_priv cm;
#endif

#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
	struct list_head fs_list;
	struct dentry *mcg_dentry;
	struct dentry *path_dentry;
#endif
	u64	hca_caps;
	struct ipoib_ethtool_st ethtool;
	unsigned int max_send_sge;
	bool sm_fullmember_sendonly_support;
	const struct net_device_ops	*rn_ops;
};

struct ipoib_ah {
	struct net_device *dev;
	struct ib_ah	  *ah;
	struct list_head   list;
	struct kref	   ref;
	unsigned int	   last_send;
	int  		   valid;
};

struct ipoib_path {
	struct net_device    *dev;
	struct sa_path_rec pathrec;
	struct ipoib_ah      *ah;
	struct sk_buff_head   queue;

	struct list_head      neigh_list;

	int		      query_id;
	struct ib_sa_query   *query;
	struct completion     done;

	struct rb_node	      rb_node;
	struct list_head      list;
};

struct ipoib_neigh {
	struct ipoib_ah    *ah;
#ifdef CONFIG_INFINIBAND_IPOIB_CM
	struct ipoib_cm_tx *cm;
#endif
	u8     daddr[INFINIBAND_ALEN];
	struct sk_buff_head queue;

	struct net_device *dev;

	struct list_head    list;
	struct ipoib_neigh __rcu *hnext;
	struct rcu_head     rcu;
	atomic_t	    refcnt;
	unsigned long       alive;
};

#define IPOIB_UD_MTU(ib_mtu)		(ib_mtu - IPOIB_ENCAP_LEN)
#define IPOIB_UD_BUF_SIZE(ib_mtu)	(ib_mtu + IB_GRH_BYTES)

void ipoib_neigh_dtor(struct ipoib_neigh *neigh);
static inline void ipoib_neigh_put(struct ipoib_neigh *neigh)
{
	if (atomic_dec_and_test(&neigh->refcnt))
		ipoib_neigh_dtor(neigh);
}
struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr);
struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr,
				      struct net_device *dev);
void ipoib_neigh_free(struct ipoib_neigh *neigh);
void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid);

extern struct workqueue_struct *ipoib_workqueue;

/* functions */

int ipoib_rx_poll(struct napi_struct *napi, int budget);
int ipoib_tx_poll(struct napi_struct *napi, int budget);
void ipoib_ib_rx_completion(struct ib_cq *cq, void *ctx_ptr);
void ipoib_ib_tx_completion(struct ib_cq *cq, void *ctx_ptr);

struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
				 struct ib_pd *pd, struct rdma_ah_attr *attr);
void ipoib_free_ah(struct kref *kref);
static inline void ipoib_put_ah(struct ipoib_ah *ah)
{
	kref_put(&ah->ref, ipoib_free_ah);
}
int ipoib_open(struct net_device *dev);
void ipoib_intf_free(struct net_device *dev);
int ipoib_add_pkey_attr(struct net_device *dev);
int ipoib_add_umcast_attr(struct net_device *dev);

int ipoib_send(struct net_device *dev, struct sk_buff *skb,
	       struct ib_ah *address, u32 dqpn);
void ipoib_reap_ah(struct work_struct *work);

struct ipoib_path *__path_find(struct net_device *dev, void *gid);
void ipoib_mark_paths_invalid(struct net_device *dev);
void ipoib_flush_paths(struct net_device *dev);
struct net_device *ipoib_intf_alloc(struct ib_device *hca, u8 port,
				    const char *format);
int ipoib_intf_init(struct ib_device *hca, u8 port, const char *format,
		    struct net_device *dev);
void ipoib_ib_tx_timer_func(struct timer_list *t);
void ipoib_ib_dev_flush_light(struct work_struct *work);
void ipoib_ib_dev_flush_normal(struct work_struct *work);
void ipoib_ib_dev_flush_heavy(struct work_struct *work);
void ipoib_pkey_event(struct work_struct *work);
void ipoib_ib_dev_cleanup(struct net_device *dev);

int ipoib_ib_dev_open_default(struct net_device *dev);
int ipoib_ib_dev_open(struct net_device *dev);
int ipoib_ib_dev_stop(struct net_device *dev);
void ipoib_ib_dev_up(struct net_device *dev);
void ipoib_ib_dev_down(struct net_device *dev);
int ipoib_ib_dev_stop_default(struct net_device *dev);
void ipoib_pkey_dev_check_presence(struct net_device *dev);

void ipoib_mcast_join_task(struct work_struct *work);
void ipoib_mcast_carrier_on_task(struct work_struct *work);
void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb);

void ipoib_mcast_restart_task(struct work_struct *work);
void ipoib_mcast_start_thread(struct net_device *dev);
int ipoib_mcast_stop_thread(struct net_device *dev);

void ipoib_mcast_dev_down(struct net_device *dev);
void ipoib_mcast_dev_flush(struct net_device *dev);

int ipoib_dma_map_tx(struct ib_device *ca, struct ipoib_tx_buf *tx_req);
void ipoib_dma_unmap_tx(struct ipoib_dev_priv *priv,
			struct ipoib_tx_buf *tx_req);

struct rtnl_link_ops *ipoib_get_link_ops(void);

static inline void ipoib_build_sge(struct ipoib_dev_priv *priv,
				   struct ipoib_tx_buf *tx_req)
{
	int i, off;
	struct sk_buff *skb = tx_req->skb;
	skb_frag_t *frags = skb_shinfo(skb)->frags;
	int nr_frags = skb_shinfo(skb)->nr_frags;
	u64 *mapping = tx_req->mapping;

	if (skb_headlen(skb)) {
		priv->tx_sge[0].addr         = mapping[0];
		priv->tx_sge[0].length       = skb_headlen(skb);
		off = 1;
	} else
		off = 0;

	for (i = 0; i < nr_frags; ++i) {
		priv->tx_sge[i + off].addr = mapping[i + off];
		priv->tx_sge[i + off].length = skb_frag_size(&frags[i]);
	}
	priv->tx_wr.wr.num_sge	     = nr_frags + off;
}

#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev);
int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter);
void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
				  union ib_gid *gid,
				  unsigned long *created,
				  unsigned int *queuelen,
				  unsigned int *complete,
				  unsigned int *send_only);

struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev);
int ipoib_path_iter_next(struct ipoib_path_iter *iter);
void ipoib_path_iter_read(struct ipoib_path_iter *iter,
			  struct ipoib_path *path);
#endif

int ipoib_mcast_attach(struct net_device *dev, struct ib_device *hca,
		       union ib_gid *mgid, u16 mlid, int set_qkey, u32 qkey);
int ipoib_mcast_detach(struct net_device *dev, struct ib_device *hca,
		       union ib_gid *mgid, u16 mlid);
void ipoib_mcast_remove_list(struct list_head *remove_list);
void ipoib_check_and_add_mcast_sendonly(struct ipoib_dev_priv *priv, u8 *mgid,
				struct list_head *remove_list);

int ipoib_init_qp(struct net_device *dev);
int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca);
void ipoib_transport_dev_cleanup(struct net_device *dev);

void ipoib_event(struct ib_event_handler *handler,
		 struct ib_event *record);

int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey);
int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey);

int __ipoib_vlan_add(struct ipoib_dev_priv *ppriv, struct ipoib_dev_priv *priv,
		     u16 pkey, int child_type);

int  __init ipoib_netlink_init(void);
void __exit ipoib_netlink_fini(void);

void ipoib_set_umcast(struct net_device *ndev, int umcast_val);
int  ipoib_set_mode(struct net_device *dev, const char *buf);

void ipoib_setup_common(struct net_device *dev);

void ipoib_pkey_open(struct ipoib_dev_priv *priv);
void ipoib_drain_cq(struct net_device *dev);

void ipoib_set_ethtool_ops(struct net_device *dev);

#define IPOIB_FLAGS_RC		0x80
#define IPOIB_FLAGS_UC		0x40

/* We don't support UC connections at the moment */
#define IPOIB_CM_SUPPORTED(ha)   (ha[0] & (IPOIB_FLAGS_RC))

#ifdef CONFIG_INFINIBAND_IPOIB_CM

extern int ipoib_max_conn_qp;

static inline int ipoib_cm_admin_enabled(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	return IPOIB_CM_SUPPORTED(dev->dev_addr) &&
		test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
}

static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	return IPOIB_CM_SUPPORTED(hwaddr) &&
		test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
}

static inline int ipoib_cm_up(struct ipoib_neigh *neigh)

{
	return test_bit(IPOIB_FLAG_OPER_UP, &neigh->cm->flags);
}

static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
{
	return neigh->cm;
}

static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
{
	neigh->cm = tx;
}

static inline int ipoib_cm_has_srq(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	return !!priv->cm.srq;
}

static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
{
	struct ipoib_dev_priv *priv = ipoib_priv(dev);
	return priv->cm.max_cm_mtu;
}

void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx);
int ipoib_cm_dev_open(struct net_device *dev);
void ipoib_cm_dev_stop(struct net_device *dev);
int ipoib_cm_dev_init(struct net_device *dev);
int ipoib_cm_add_mode_attr(struct net_device *dev);
void ipoib_cm_dev_cleanup(struct net_device *dev);
struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
				    struct ipoib_neigh *neigh);
void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx);
void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
			   unsigned int mtu);
void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc);
void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc);
#else

struct ipoib_cm_tx;

#define ipoib_max_conn_qp 0

static inline int ipoib_cm_admin_enabled(struct net_device *dev)
{
	return 0;
}
static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)

{
	return 0;
}

static inline int ipoib_cm_up(struct ipoib_neigh *neigh)

{
	return 0;
}

static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
{
	return NULL;
}

static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
{
}

static inline int ipoib_cm_has_srq(struct net_device *dev)
{
	return 0;
}

static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
{
	return 0;
}

static inline
void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx)
{
	return;
}

static inline
int ipoib_cm_dev_open(struct net_device *dev)
{
	return 0;
}

static inline
void ipoib_cm_dev_stop(struct net_device *dev)
{
	return;
}

static inline
int ipoib_cm_dev_init(struct net_device *dev)
{
	return -EOPNOTSUPP;
}

static inline
void ipoib_cm_dev_cleanup(struct net_device *dev)
{
	return;
}

static inline
struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
				    struct ipoib_neigh *neigh)
{
	return NULL;
}

static inline
void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx)
{
	return;
}

static inline
int ipoib_cm_add_mode_attr(struct net_device *dev)
{
	return 0;
}

static inline void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
					 unsigned int mtu)
{
	dev_kfree_skb_any(skb);
}

static inline void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
{
}

static inline void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
{
}
#endif

#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
void ipoib_create_debug_files(struct net_device *dev);
void ipoib_delete_debug_files(struct net_device *dev);
int ipoib_register_debugfs(void);
void ipoib_unregister_debugfs(void);
#else
static inline void ipoib_create_debug_files(struct net_device *dev) { }
static inline void ipoib_delete_debug_files(struct net_device *dev) { }
static inline int ipoib_register_debugfs(void) { return 0; }
static inline void ipoib_unregister_debugfs(void) { }
#endif

#define ipoib_printk(level, priv, format, arg...)	\
	printk(level "%s: " format, ((struct ipoib_dev_priv *) priv)->dev->name , ## arg)
#define ipoib_warn(priv, format, arg...)		\
do {							\
	static DEFINE_RATELIMIT_STATE(_rs,		\
		10 * HZ /*10 seconds */,		\
		100);		\
	if (__ratelimit(&_rs))				\
		ipoib_printk(KERN_WARNING, priv, format , ## arg);\
} while (0)

extern int ipoib_sendq_size;
extern int ipoib_recvq_size;

extern struct ib_sa_client ipoib_sa_client;

#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
extern int ipoib_debug_level;

#define ipoib_dbg(priv, format, arg...)			\
	do {						\
		if (ipoib_debug_level > 0)			\
			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
	} while (0)
#define ipoib_dbg_mcast(priv, format, arg...)		\
	do {						\
		if (mcast_debug_level > 0)		\
			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
	} while (0)
#else /* CONFIG_INFINIBAND_IPOIB_DEBUG */
#define ipoib_dbg(priv, format, arg...)			\
	do { (void) (priv); } while (0)
#define ipoib_dbg_mcast(priv, format, arg...)		\
	do { (void) (priv); } while (0)
#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */

#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
#define ipoib_dbg_data(priv, format, arg...)		\
	do {						\
		if (data_debug_level > 0)		\
			ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
	} while (0)
#else /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
#define ipoib_dbg_data(priv, format, arg...)		\
	do { (void) (priv); } while (0)
#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */

#define IPOIB_QPN(ha) (be32_to_cpup((__be32 *) ha) & 0xffffff)

extern const char ipoib_driver_version[];

#endif /* _IPOIB_H */