summaryrefslogtreecommitdiff
path: root/drivers/infiniband/hw/ipath/ipath_verbs.h
blob: f3d1f2cee6f8f15ac5cd066e92f79dda3ebf9d3b (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
844
845
846
847
848
849
850
/*
 * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
 * Copyright (c) 2005, 2006 PathScale, 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 IPATH_VERBS_H
#define IPATH_VERBS_H

#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/kref.h>
#include <rdma/ib_pack.h>
#include <rdma/ib_user_verbs.h>

#include "ipath_layer.h"

#define IPATH_MAX_RDMA_ATOMIC	4

#define QPN_MAX                 (1 << 24)
#define QPNMAP_ENTRIES          (QPN_MAX / PAGE_SIZE / BITS_PER_BYTE)

/*
 * Increment this value if any changes that break userspace ABI
 * compatibility are made.
 */
#define IPATH_UVERBS_ABI_VERSION       2

/*
 * Define an ib_cq_notify value that is not valid so we know when CQ
 * notifications are armed.
 */
#define IB_CQ_NONE	(IB_CQ_NEXT_COMP + 1)

#define IB_RNR_NAK			0x20
#define IB_NAK_PSN_ERROR		0x60
#define IB_NAK_INVALID_REQUEST		0x61
#define IB_NAK_REMOTE_ACCESS_ERROR	0x62
#define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
#define IB_NAK_INVALID_RD_REQUEST	0x64

#define IPATH_POST_SEND_OK		0x01
#define IPATH_POST_RECV_OK		0x02
#define IPATH_PROCESS_RECV_OK		0x04
#define IPATH_PROCESS_SEND_OK		0x08

/* IB Performance Manager status values */
#define IB_PMA_SAMPLE_STATUS_DONE	0x00
#define IB_PMA_SAMPLE_STATUS_STARTED	0x01
#define IB_PMA_SAMPLE_STATUS_RUNNING	0x02

/* Mandatory IB performance counter select values. */
#define IB_PMA_PORT_XMIT_DATA	__constant_htons(0x0001)
#define IB_PMA_PORT_RCV_DATA	__constant_htons(0x0002)
#define IB_PMA_PORT_XMIT_PKTS	__constant_htons(0x0003)
#define IB_PMA_PORT_RCV_PKTS	__constant_htons(0x0004)
#define IB_PMA_PORT_XMIT_WAIT	__constant_htons(0x0005)

struct ib_reth {
	__be64 vaddr;
	__be32 rkey;
	__be32 length;
} __attribute__ ((packed));

struct ib_atomic_eth {
	__be32 vaddr[2];	/* unaligned so access as 2 32-bit words */
	__be32 rkey;
	__be64 swap_data;
	__be64 compare_data;
} __attribute__ ((packed));

struct ipath_other_headers {
	__be32 bth[3];
	union {
		struct {
			__be32 deth[2];
			__be32 imm_data;
		} ud;
		struct {
			struct ib_reth reth;
			__be32 imm_data;
		} rc;
		struct {
			__be32 aeth;
			__be32 atomic_ack_eth[2];
		} at;
		__be32 imm_data;
		__be32 aeth;
		struct ib_atomic_eth atomic_eth;
	} u;
} __attribute__ ((packed));

/*
 * Note that UD packets with a GRH header are 8+40+12+8 = 68 bytes
 * long (72 w/ imm_data).  Only the first 56 bytes of the IB header
 * will be in the eager header buffer.  The remaining 12 or 16 bytes
 * are in the data buffer.
 */
struct ipath_ib_header {
	__be16 lrh[4];
	union {
		struct {
			struct ib_grh grh;
			struct ipath_other_headers oth;
		} l;
		struct ipath_other_headers oth;
	} u;
} __attribute__ ((packed));

/*
 * There is one struct ipath_mcast for each multicast GID.
 * All attached QPs are then stored as a list of
 * struct ipath_mcast_qp.
 */
struct ipath_mcast_qp {
	struct list_head list;
	struct ipath_qp *qp;
};

struct ipath_mcast {
	struct rb_node rb_node;
	union ib_gid mgid;
	struct list_head qp_list;
	wait_queue_head_t wait;
	atomic_t refcount;
	int n_attached;
};

/* Protection domain */
struct ipath_pd {
	struct ib_pd ibpd;
	int user;		/* non-zero if created from user space */
};

/* Address Handle */
struct ipath_ah {
	struct ib_ah ibah;
	struct ib_ah_attr attr;
};

/*
 * This structure is used by ipath_mmap() to validate an offset
 * when an mmap() request is made.  The vm_area_struct then uses
 * this as its vm_private_data.
 */
struct ipath_mmap_info {
	struct list_head pending_mmaps;
	struct ib_ucontext *context;
	void *obj;
	__u64 offset;
	struct kref ref;
	unsigned size;
};

/*
 * This structure is used to contain the head pointer, tail pointer,
 * and completion queue entries as a single memory allocation so
 * it can be mmap'ed into user space.
 */
struct ipath_cq_wc {
	u32 head;		/* index of next entry to fill */
	u32 tail;		/* index of next ib_poll_cq() entry */
	struct ib_uverbs_wc queue[1]; /* this is actually size ibcq.cqe + 1 */
};

/*
 * The completion queue structure.
 */
struct ipath_cq {
	struct ib_cq ibcq;
	struct tasklet_struct comptask;
	spinlock_t lock;
	u8 notify;
	u8 triggered;
	struct ipath_cq_wc *queue;
	struct ipath_mmap_info *ip;
};

/*
 * A segment is a linear region of low physical memory.
 * XXX Maybe we should use phys addr here and kmap()/kunmap().
 * Used by the verbs layer.
 */
struct ipath_seg {
	void *vaddr;
	size_t length;
};

/* The number of ipath_segs that fit in a page. */
#define IPATH_SEGSZ     (PAGE_SIZE / sizeof (struct ipath_seg))

struct ipath_segarray {
	struct ipath_seg segs[IPATH_SEGSZ];
};

struct ipath_mregion {
	struct ib_pd *pd;	/* shares refcnt of ibmr.pd */
	u64 user_base;		/* User's address for this region */
	u64 iova;		/* IB start address of this region */
	size_t length;
	u32 lkey;
	u32 offset;		/* offset (bytes) to start of region */
	int access_flags;
	u32 max_segs;		/* number of ipath_segs in all the arrays */
	u32 mapsz;		/* size of the map array */
	struct ipath_segarray *map[0];	/* the segments */
};

/*
 * These keep track of the copy progress within a memory region.
 * Used by the verbs layer.
 */
struct ipath_sge {
	struct ipath_mregion *mr;
	void *vaddr;		/* current pointer into the segment */
	u32 sge_length;		/* length of the SGE */
	u32 length;		/* remaining length of the segment */
	u16 m;			/* current index: mr->map[m] */
	u16 n;			/* current index: mr->map[m]->segs[n] */
};

/* Memory region */
struct ipath_mr {
	struct ib_mr ibmr;
	struct ib_umem *umem;
	struct ipath_mregion mr;	/* must be last */
};

/*
 * Send work request queue entry.
 * The size of the sg_list is determined when the QP is created and stored
 * in qp->s_max_sge.
 */
struct ipath_swqe {
	struct ib_send_wr wr;	/* don't use wr.sg_list */
	u32 psn;		/* first packet sequence number */
	u32 lpsn;		/* last packet sequence number */
	u32 ssn;		/* send sequence number */
	u32 length;		/* total length of data in sg_list */
	struct ipath_sge sg_list[0];
};

/*
 * Receive work request queue entry.
 * The size of the sg_list is determined when the QP (or SRQ) is created
 * and stored in qp->r_rq.max_sge (or srq->rq.max_sge).
 */
struct ipath_rwqe {
	u64 wr_id;
	u8 num_sge;
	struct ib_sge sg_list[0];
};

/*
 * This structure is used to contain the head pointer, tail pointer,
 * and receive work queue entries as a single memory allocation so
 * it can be mmap'ed into user space.
 * Note that the wq array elements are variable size so you can't
 * just index into the array to get the N'th element;
 * use get_rwqe_ptr() instead.
 */
struct ipath_rwq {
	u32 head;		/* new work requests posted to the head */
	u32 tail;		/* receives pull requests from here. */
	struct ipath_rwqe wq[0];
};

struct ipath_rq {
	struct ipath_rwq *wq;
	spinlock_t lock;
	u32 size;		/* size of RWQE array */
	u8 max_sge;
};

struct ipath_srq {
	struct ib_srq ibsrq;
	struct ipath_rq rq;
	struct ipath_mmap_info *ip;
	/* send signal when number of RWQEs < limit */
	u32 limit;
};

struct ipath_sge_state {
	struct ipath_sge *sg_list;      /* next SGE to be used if any */
	struct ipath_sge sge;   /* progress state for the current SGE */
	u8 num_sge;
};

/*
 * This structure holds the information that the send tasklet needs
 * to send a RDMA read response or atomic operation.
 */
struct ipath_ack_entry {
	u8 opcode;
	u8 sent;
	u32 psn;
	union {
		struct ipath_sge_state rdma_sge;
		u64 atomic_data;
	};
};

/*
 * Variables prefixed with s_ are for the requester (sender).
 * Variables prefixed with r_ are for the responder (receiver).
 * Variables prefixed with ack_ are for responder replies.
 *
 * Common variables are protected by both r_rq.lock and s_lock in that order
 * which only happens in modify_qp() or changing the QP 'state'.
 */
struct ipath_qp {
	struct ib_qp ibqp;
	struct ipath_qp *next;		/* link list for QPN hash table */
	struct ipath_qp *timer_next;	/* link list for ipath_ib_timer() */
	struct list_head piowait;	/* link for wait PIO buf */
	struct list_head timerwait;	/* link for waiting for timeouts */
	struct ib_ah_attr remote_ah_attr;
	struct ipath_ib_header s_hdr;	/* next packet header to send */
	atomic_t refcount;
	wait_queue_head_t wait;
	struct tasklet_struct s_task;
	struct ipath_mmap_info *ip;
	struct ipath_sge_state *s_cur_sge;
	struct ipath_sge_state s_sge;	/* current send request data */
	struct ipath_ack_entry s_ack_queue[IPATH_MAX_RDMA_ATOMIC + 1];
	struct ipath_sge_state s_ack_rdma_sge;
	struct ipath_sge_state s_rdma_read_sge;
	struct ipath_sge_state r_sge;	/* current receive data */
	spinlock_t s_lock;
	unsigned long s_busy;
	u32 s_hdrwords;		/* size of s_hdr in 32 bit words */
	u32 s_cur_size;		/* size of send packet in bytes */
	u32 s_len;		/* total length of s_sge */
	u32 s_rdma_read_len;	/* total length of s_rdma_read_sge */
	u32 s_next_psn;		/* PSN for next request */
	u32 s_last_psn;		/* last response PSN processed */
	u32 s_psn;		/* current packet sequence number */
	u32 s_ack_rdma_psn;	/* PSN for sending RDMA read responses */
	u32 s_ack_psn;		/* PSN for acking sends and RDMA writes */
	u32 s_rnr_timeout;	/* number of milliseconds for RNR timeout */
	u32 r_ack_psn;		/* PSN for next ACK or atomic ACK */
	u64 r_wr_id;		/* ID for current receive WQE */
	u32 r_len;		/* total length of r_sge */
	u32 r_rcv_len;		/* receive data len processed */
	u32 r_psn;		/* expected rcv packet sequence number */
	u32 r_msn;		/* message sequence number */
	u8 state;		/* QP state */
	u8 s_state;		/* opcode of last packet sent */
	u8 s_ack_state;		/* opcode of packet to ACK */
	u8 s_nak_state;		/* non-zero if NAK is pending */
	u8 r_state;		/* opcode of last packet received */
	u8 r_nak_state;		/* non-zero if NAK is pending */
	u8 r_min_rnr_timer;	/* retry timeout value for RNR NAKs */
	u8 r_reuse_sge;		/* for UC receive errors */
	u8 r_sge_inx;		/* current index into sg_list */
	u8 r_wrid_valid;	/* r_wrid set but CQ entry not yet made */
	u8 r_max_rd_atomic;	/* max number of RDMA read/atomic to receive */
	u8 r_head_ack_queue;	/* index into s_ack_queue[] */
	u8 qp_access_flags;
	u8 s_max_sge;		/* size of s_wq->sg_list */
	u8 s_retry_cnt;		/* number of times to retry */
	u8 s_rnr_retry_cnt;
	u8 s_retry;		/* requester retry counter */
	u8 s_rnr_retry;		/* requester RNR retry counter */
	u8 s_wait_credit;	/* limit number of unacked packets sent */
	u8 s_pkey_index;	/* PKEY index to use */
	u8 s_max_rd_atomic;	/* max number of RDMA read/atomic to send */
	u8 s_num_rd_atomic;	/* number of RDMA read/atomic pending */
	u8 s_tail_ack_queue;	/* index into s_ack_queue[] */
	u8 s_flags;
	u8 timeout;		/* Timeout for this QP */
	enum ib_mtu path_mtu;
	u32 remote_qpn;
	u32 qkey;		/* QKEY for this QP (for UD or RD) */
	u32 s_size;		/* send work queue size */
	u32 s_head;		/* new entries added here */
	u32 s_tail;		/* next entry to process */
	u32 s_cur;		/* current work queue entry */
	u32 s_last;		/* last un-ACK'ed entry */
	u32 s_ssn;		/* SSN of tail entry */
	u32 s_lsn;		/* limit sequence number (credit) */
	struct ipath_swqe *s_wq;	/* send work queue */
	struct ipath_rq r_rq;		/* receive work queue */
	struct ipath_sge r_sg_list[0];	/* verified SGEs */
};

/* Bit definition for s_busy. */
#define IPATH_S_BUSY		0

/*
 * Bit definitions for s_flags.
 */
#define IPATH_S_SIGNAL_REQ_WR	0x01
#define IPATH_S_FENCE_PENDING	0x02
#define IPATH_S_RDMAR_PENDING	0x04
#define IPATH_S_ACK_PENDING	0x08

#define IPATH_PSN_CREDIT	512

/*
 * Since struct ipath_swqe is not a fixed size, we can't simply index into
 * struct ipath_qp.s_wq.  This function does the array index computation.
 */
static inline struct ipath_swqe *get_swqe_ptr(struct ipath_qp *qp,
					      unsigned n)
{
	return (struct ipath_swqe *)((char *)qp->s_wq +
				     (sizeof(struct ipath_swqe) +
				      qp->s_max_sge *
				      sizeof(struct ipath_sge)) * n);
}

/*
 * Since struct ipath_rwqe is not a fixed size, we can't simply index into
 * struct ipath_rwq.wq.  This function does the array index computation.
 */
static inline struct ipath_rwqe *get_rwqe_ptr(struct ipath_rq *rq,
					      unsigned n)
{
	return (struct ipath_rwqe *)
		((char *) rq->wq->wq +
		 (sizeof(struct ipath_rwqe) +
		  rq->max_sge * sizeof(struct ib_sge)) * n);
}

/*
 * QPN-map pages start out as NULL, they get allocated upon
 * first use and are never deallocated. This way,
 * large bitmaps are not allocated unless large numbers of QPs are used.
 */
struct qpn_map {
	atomic_t n_free;
	void *page;
};

struct ipath_qp_table {
	spinlock_t lock;
	u32 last;		/* last QP number allocated */
	u32 max;		/* size of the hash table */
	u32 nmaps;		/* size of the map table */
	struct ipath_qp **table;
	/* bit map of free numbers */
	struct qpn_map map[QPNMAP_ENTRIES];
};

struct ipath_lkey_table {
	spinlock_t lock;
	u32 next;		/* next unused index (speeds search) */
	u32 gen;		/* generation count */
	u32 max;		/* size of the table */
	struct ipath_mregion **table;
};

struct ipath_opcode_stats {
	u64 n_packets;		/* number of packets */
	u64 n_bytes;		/* total number of bytes */
};

struct ipath_ibdev {
	struct ib_device ibdev;
	struct ipath_devdata *dd;
	struct list_head pending_mmaps;
	spinlock_t mmap_offset_lock;
	u32 mmap_offset;
	int ib_unit;		/* This is the device number */
	u16 sm_lid;		/* in host order */
	u8 sm_sl;
	u8 mkeyprot_resv_lmc;
	/* non-zero when timer is set */
	unsigned long mkey_lease_timeout;

	/* The following fields are really per port. */
	struct ipath_qp_table qp_table;
	struct ipath_lkey_table lk_table;
	struct list_head pending[3];	/* FIFO of QPs waiting for ACKs */
	struct list_head piowait;	/* list for wait PIO buf */
	/* list of QPs waiting for RNR timer */
	struct list_head rnrwait;
	spinlock_t pending_lock;
	__be64 sys_image_guid;	/* in network order */
	__be64 gid_prefix;	/* in network order */
	__be64 mkey;

	u32 n_pds_allocated;	/* number of PDs allocated for device */
	spinlock_t n_pds_lock;
	u32 n_ahs_allocated;	/* number of AHs allocated for device */
	spinlock_t n_ahs_lock;
	u32 n_cqs_allocated;	/* number of CQs allocated for device */
	spinlock_t n_cqs_lock;
	u32 n_qps_allocated;	/* number of QPs allocated for device */
	spinlock_t n_qps_lock;
	u32 n_srqs_allocated;	/* number of SRQs allocated for device */
	spinlock_t n_srqs_lock;
	u32 n_mcast_grps_allocated; /* number of mcast groups allocated */
	spinlock_t n_mcast_grps_lock;

	u64 ipath_sword;	/* total dwords sent (sample result) */
	u64 ipath_rword;	/* total dwords received (sample result) */
	u64 ipath_spkts;	/* total packets sent (sample result) */
	u64 ipath_rpkts;	/* total packets received (sample result) */
	/* # of ticks no data sent (sample result) */
	u64 ipath_xmit_wait;
	u64 rcv_errors;		/* # of packets with SW detected rcv errs */
	u64 n_unicast_xmit;	/* total unicast packets sent */
	u64 n_unicast_rcv;	/* total unicast packets received */
	u64 n_multicast_xmit;	/* total multicast packets sent */
	u64 n_multicast_rcv;	/* total multicast packets received */
	u64 z_symbol_error_counter;		/* starting count for PMA */
	u64 z_link_error_recovery_counter;	/* starting count for PMA */
	u64 z_link_downed_counter;		/* starting count for PMA */
	u64 z_port_rcv_errors;			/* starting count for PMA */
	u64 z_port_rcv_remphys_errors;		/* starting count for PMA */
	u64 z_port_xmit_discards;		/* starting count for PMA */
	u64 z_port_xmit_data;			/* starting count for PMA */
	u64 z_port_rcv_data;			/* starting count for PMA */
	u64 z_port_xmit_packets;		/* starting count for PMA */
	u64 z_port_rcv_packets;			/* starting count for PMA */
	u32 z_pkey_violations;			/* starting count for PMA */
	u32 z_local_link_integrity_errors;	/* starting count for PMA */
	u32 z_excessive_buffer_overrun_errors;	/* starting count for PMA */
	u32 n_rc_resends;
	u32 n_rc_acks;
	u32 n_rc_qacks;
	u32 n_seq_naks;
	u32 n_rdma_seq;
	u32 n_rnr_naks;
	u32 n_other_naks;
	u32 n_timeouts;
	u32 n_rc_stalls;
	u32 n_pkt_drops;
	u32 n_vl15_dropped;
	u32 n_wqe_errs;
	u32 n_rdma_dup_busy;
	u32 n_piowait;
	u32 n_no_piobuf;
	u32 port_cap_flags;
	u32 pma_sample_start;
	u32 pma_sample_interval;
	__be16 pma_counter_select[5];
	u16 pma_tag;
	u16 qkey_violations;
	u16 mkey_violations;
	u16 mkey_lease_period;
	u16 pending_index;	/* which pending queue is active */
	u8 pma_sample_status;
	u8 subnet_timeout;
	u8 link_width_enabled;
	u8 vl_high_limit;
	struct ipath_opcode_stats opstats[128];
};

struct ipath_verbs_counters {
	u64 symbol_error_counter;
	u64 link_error_recovery_counter;
	u64 link_downed_counter;
	u64 port_rcv_errors;
	u64 port_rcv_remphys_errors;
	u64 port_xmit_discards;
	u64 port_xmit_data;
	u64 port_rcv_data;
	u64 port_xmit_packets;
	u64 port_rcv_packets;
	u32 local_link_integrity_errors;
	u32 excessive_buffer_overrun_errors;
};

static inline struct ipath_mr *to_imr(struct ib_mr *ibmr)
{
	return container_of(ibmr, struct ipath_mr, ibmr);
}

static inline struct ipath_pd *to_ipd(struct ib_pd *ibpd)
{
	return container_of(ibpd, struct ipath_pd, ibpd);
}

static inline struct ipath_ah *to_iah(struct ib_ah *ibah)
{
	return container_of(ibah, struct ipath_ah, ibah);
}

static inline struct ipath_cq *to_icq(struct ib_cq *ibcq)
{
	return container_of(ibcq, struct ipath_cq, ibcq);
}

static inline struct ipath_srq *to_isrq(struct ib_srq *ibsrq)
{
	return container_of(ibsrq, struct ipath_srq, ibsrq);
}

static inline struct ipath_qp *to_iqp(struct ib_qp *ibqp)
{
	return container_of(ibqp, struct ipath_qp, ibqp);
}

static inline struct ipath_ibdev *to_idev(struct ib_device *ibdev)
{
	return container_of(ibdev, struct ipath_ibdev, ibdev);
}

int ipath_process_mad(struct ib_device *ibdev,
		      int mad_flags,
		      u8 port_num,
		      struct ib_wc *in_wc,
		      struct ib_grh *in_grh,
		      struct ib_mad *in_mad, struct ib_mad *out_mad);

/*
 * Compare the lower 24 bits of the two values.
 * Returns an integer <, ==, or > than zero.
 */
static inline int ipath_cmp24(u32 a, u32 b)
{
	return (((int) a) - ((int) b)) << 8;
}

struct ipath_mcast *ipath_mcast_find(union ib_gid *mgid);

int ipath_snapshot_counters(struct ipath_devdata *dd, u64 *swords,
			    u64 *rwords, u64 *spkts, u64 *rpkts,
			    u64 *xmit_wait);

int ipath_get_counters(struct ipath_devdata *dd,
		       struct ipath_verbs_counters *cntrs);

int ipath_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);

int ipath_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);

int ipath_mcast_tree_empty(void);

__be32 ipath_compute_aeth(struct ipath_qp *qp);

struct ipath_qp *ipath_lookup_qpn(struct ipath_qp_table *qpt, u32 qpn);

struct ib_qp *ipath_create_qp(struct ib_pd *ibpd,
			      struct ib_qp_init_attr *init_attr,
			      struct ib_udata *udata);

int ipath_destroy_qp(struct ib_qp *ibqp);

void ipath_error_qp(struct ipath_qp *qp, enum ib_wc_status err);

int ipath_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
		    int attr_mask, struct ib_udata *udata);

int ipath_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
		   int attr_mask, struct ib_qp_init_attr *init_attr);

void ipath_free_all_qps(struct ipath_qp_table *qpt);

int ipath_init_qp_table(struct ipath_ibdev *idev, int size);

void ipath_sqerror_qp(struct ipath_qp *qp, struct ib_wc *wc);

void ipath_get_credit(struct ipath_qp *qp, u32 aeth);

int ipath_verbs_send(struct ipath_devdata *dd, u32 hdrwords,
		     u32 *hdr, u32 len, struct ipath_sge_state *ss);

void ipath_cq_enter(struct ipath_cq *cq, struct ib_wc *entry, int sig);

void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length);

void ipath_skip_sge(struct ipath_sge_state *ss, u32 length);

int ipath_post_ruc_send(struct ipath_qp *qp, struct ib_send_wr *wr);

void ipath_uc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
		  int has_grh, void *data, u32 tlen, struct ipath_qp *qp);

void ipath_rc_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
		  int has_grh, void *data, u32 tlen, struct ipath_qp *qp);

void ipath_restart_rc(struct ipath_qp *qp, u32 psn, struct ib_wc *wc);

int ipath_post_ud_send(struct ipath_qp *qp, struct ib_send_wr *wr);

void ipath_ud_rcv(struct ipath_ibdev *dev, struct ipath_ib_header *hdr,
		  int has_grh, void *data, u32 tlen, struct ipath_qp *qp);

int ipath_alloc_lkey(struct ipath_lkey_table *rkt,
		     struct ipath_mregion *mr);

void ipath_free_lkey(struct ipath_lkey_table *rkt, u32 lkey);

int ipath_lkey_ok(struct ipath_qp *qp, struct ipath_sge *isge,
		  struct ib_sge *sge, int acc);

int ipath_rkey_ok(struct ipath_qp *qp, struct ipath_sge_state *ss,
		  u32 len, u64 vaddr, u32 rkey, int acc);

int ipath_post_srq_receive(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
			   struct ib_recv_wr **bad_wr);

struct ib_srq *ipath_create_srq(struct ib_pd *ibpd,
				struct ib_srq_init_attr *srq_init_attr,
				struct ib_udata *udata);

int ipath_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
		     enum ib_srq_attr_mask attr_mask,
		     struct ib_udata *udata);

int ipath_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr);

int ipath_destroy_srq(struct ib_srq *ibsrq);

int ipath_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry);

struct ib_cq *ipath_create_cq(struct ib_device *ibdev, int entries, int comp_vector,
			      struct ib_ucontext *context,
			      struct ib_udata *udata);

int ipath_destroy_cq(struct ib_cq *ibcq);

int ipath_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags);

int ipath_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);

struct ib_mr *ipath_get_dma_mr(struct ib_pd *pd, int acc);

struct ib_mr *ipath_reg_phys_mr(struct ib_pd *pd,
				struct ib_phys_buf *buffer_list,
				int num_phys_buf, int acc, u64 *iova_start);

struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
				u64 virt_addr, int mr_access_flags,
				struct ib_udata *udata);

int ipath_dereg_mr(struct ib_mr *ibmr);

struct ib_fmr *ipath_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
			       struct ib_fmr_attr *fmr_attr);

int ipath_map_phys_fmr(struct ib_fmr *ibfmr, u64 * page_list,
		       int list_len, u64 iova);

int ipath_unmap_fmr(struct list_head *fmr_list);

int ipath_dealloc_fmr(struct ib_fmr *ibfmr);

void ipath_release_mmap_info(struct kref *ref);

struct ipath_mmap_info *ipath_create_mmap_info(struct ipath_ibdev *dev,
					       u32 size,
					       struct ib_ucontext *context,
					       void *obj);

void ipath_update_mmap_info(struct ipath_ibdev *dev,
			    struct ipath_mmap_info *ip,
			    u32 size, void *obj);

int ipath_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);

void ipath_no_bufs_available(struct ipath_qp *qp, struct ipath_ibdev *dev);

void ipath_insert_rnr_queue(struct ipath_qp *qp);

int ipath_get_rwqe(struct ipath_qp *qp, int wr_id_only);

u32 ipath_make_grh(struct ipath_ibdev *dev, struct ib_grh *hdr,
		   struct ib_global_route *grh, u32 hwords, u32 nwords);

void ipath_do_ruc_send(unsigned long data);

int ipath_make_rc_req(struct ipath_qp *qp, struct ipath_other_headers *ohdr,
		      u32 pmtu, u32 *bth0p, u32 *bth2p);

int ipath_make_uc_req(struct ipath_qp *qp, struct ipath_other_headers *ohdr,
		      u32 pmtu, u32 *bth0p, u32 *bth2p);

int ipath_register_ib_device(struct ipath_devdata *);

void ipath_unregister_ib_device(struct ipath_ibdev *);

void ipath_ib_rcv(struct ipath_ibdev *, void *, void *, u32);

int ipath_ib_piobufavail(struct ipath_ibdev *);

void ipath_ib_timer(struct ipath_ibdev *);

unsigned ipath_get_npkeys(struct ipath_devdata *);

u32 ipath_get_cr_errpkey(struct ipath_devdata *);

unsigned ipath_get_pkey(struct ipath_devdata *, unsigned);

extern const enum ib_wc_opcode ib_ipath_wc_opcode[];

extern const u8 ipath_cvt_physportstate[];

extern const int ib_ipath_state_ops[];

extern unsigned int ib_ipath_lkey_table_size;

extern unsigned int ib_ipath_max_cqes;

extern unsigned int ib_ipath_max_cqs;

extern unsigned int ib_ipath_max_qp_wrs;

extern unsigned int ib_ipath_max_qps;

extern unsigned int ib_ipath_max_sges;

extern unsigned int ib_ipath_max_mcast_grps;

extern unsigned int ib_ipath_max_mcast_qp_attached;

extern unsigned int ib_ipath_max_srqs;

extern unsigned int ib_ipath_max_srq_sges;

extern unsigned int ib_ipath_max_srq_wrs;

extern const u32 ib_ipath_rnr_table[];

extern struct ib_dma_mapping_ops ipath_dma_mapping_ops;

#endif				/* IPATH_VERBS_H */