summaryrefslogtreecommitdiff
path: root/drivers/infiniband/hw/ipath/ipath_kernel.h
blob: 398de7f7e2e4b62f88ed8531e8fe4aae62a57668 (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
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
#ifndef _IPATH_KERNEL_H
#define _IPATH_KERNEL_H
/*
 * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
 * Copyright (c) 2003, 2004, 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.
 */

/*
 * This header file is the base header file for infinipath kernel code
 * ipath_user.h serves a similar purpose for user code.
 */

#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/mutex.h>
#include <asm/io.h>
#include <rdma/ib_verbs.h>

#include "ipath_common.h"
#include "ipath_debug.h"
#include "ipath_registers.h"

/* only s/w major version of InfiniPath we can handle */
#define IPATH_CHIP_VERS_MAJ 2U

/* don't care about this except printing */
#define IPATH_CHIP_VERS_MIN 0U

/* temporary, maybe always */
extern struct infinipath_stats ipath_stats;

#define IPATH_CHIP_SWVERSION IPATH_CHIP_VERS_MAJ
/*
 * First-cut critierion for "device is active" is
 * two thousand dwords combined Tx, Rx traffic per
 * 5-second interval. SMA packets are 64 dwords,
 * and occur "a few per second", presumably each way.
 */
#define IPATH_TRAFFIC_ACTIVE_THRESHOLD (2000)
/*
 * Struct used to indicate which errors are logged in each of the
 * error-counters that are logged to EEPROM. A counter is incremented
 * _once_ (saturating at 255) for each event with any bits set in
 * the error or hwerror register masks below.
 */
#define IPATH_EEP_LOG_CNT (4)
struct ipath_eep_log_mask {
	u64 errs_to_log;
	u64 hwerrs_to_log;
};

struct ipath_portdata {
	void **port_rcvegrbuf;
	dma_addr_t *port_rcvegrbuf_phys;
	/* rcvhdrq base, needs mmap before useful */
	void *port_rcvhdrq;
	/* kernel virtual address where hdrqtail is updated */
	void *port_rcvhdrtail_kvaddr;
	/*
	 * temp buffer for expected send setup, allocated at open, instead
	 * of each setup call
	 */
	void *port_tid_pg_list;
	/* when waiting for rcv or pioavail */
	wait_queue_head_t port_wait;
	/*
	 * rcvegr bufs base, physical, must fit
	 * in 44 bits so 32 bit programs mmap64 44 bit works)
	 */
	dma_addr_t port_rcvegr_phys;
	/* mmap of hdrq, must fit in 44 bits */
	dma_addr_t port_rcvhdrq_phys;
	dma_addr_t port_rcvhdrqtailaddr_phys;
	/*
	 * number of opens (including slave subports) on this instance
	 * (ignoring forks, dup, etc. for now)
	 */
	int port_cnt;
	/*
	 * how much space to leave at start of eager TID entries for
	 * protocol use, on each TID
	 */
	/* instead of calculating it */
	unsigned port_port;
	/* non-zero if port is being shared. */
	u16 port_subport_cnt;
	/* non-zero if port is being shared. */
	u16 port_subport_id;
	/* chip offset of PIO buffers for this port */
	u32 port_piobufs;
	/* how many alloc_pages() chunks in port_rcvegrbuf_pages */
	u32 port_rcvegrbuf_chunks;
	/* how many egrbufs per chunk */
	u32 port_rcvegrbufs_perchunk;
	/* order for port_rcvegrbuf_pages */
	size_t port_rcvegrbuf_size;
	/* rcvhdrq size (for freeing) */
	size_t port_rcvhdrq_size;
	/* next expected TID to check when looking for free */
	u32 port_tidcursor;
	/* next expected TID to check */
	unsigned long port_flag;
	/* what happened */
	unsigned long int_flag;
	/* WAIT_RCV that timed out, no interrupt */
	u32 port_rcvwait_to;
	/* WAIT_PIO that timed out, no interrupt */
	u32 port_piowait_to;
	/* WAIT_RCV already happened, no wait */
	u32 port_rcvnowait;
	/* WAIT_PIO already happened, no wait */
	u32 port_pionowait;
	/* total number of rcvhdrqfull errors */
	u32 port_hdrqfull;
	/*
	 * Used to suppress multiple instances of same
	 * port staying stuck at same point.
	 */
	u32 port_lastrcvhdrqtail;
	/* saved total number of rcvhdrqfull errors for poll edge trigger */
	u32 port_hdrqfull_poll;
	/* total number of polled urgent packets */
	u32 port_urgent;
	/* saved total number of polled urgent packets for poll edge trigger */
	u32 port_urgent_poll;
	/* pid of process using this port */
	pid_t port_pid;
	pid_t port_subpid[INFINIPATH_MAX_SUBPORT];
	/* same size as task_struct .comm[] */
	char port_comm[16];
	/* pkeys set by this use of this port */
	u16 port_pkeys[4];
	/* so file ops can get at unit */
	struct ipath_devdata *port_dd;
	/* A page of memory for rcvhdrhead, rcvegrhead, rcvegrtail * N */
	void *subport_uregbase;
	/* An array of pages for the eager receive buffers * N */
	void *subport_rcvegrbuf;
	/* An array of pages for the eager header queue entries * N */
	void *subport_rcvhdr_base;
	/* The version of the library which opened this port */
	u32 userversion;
	/* Bitmask of active slaves */
	u32 active_slaves;
	/* Type of packets or conditions we want to poll for */
	u16 poll_type;
	/* port rcvhdrq head offset */
	u32 port_head;
};

struct sk_buff;

/*
 * control information for layered drivers
 */
struct _ipath_layer {
	void *l_arg;
};

struct ipath_skbinfo {
	struct sk_buff *skb;
	dma_addr_t phys;
};

/* max dwords in small buffer packet */
#define IPATH_SMALLBUF_DWORDS (dd->ipath_piosize2k >> 2)

/*
 * Possible IB config parameters for ipath_f_get/set_ib_cfg()
 */
#define IPATH_IB_CFG_LIDLMC 0 /* Get/set LID (LS16b) and Mask (MS16b) */
#define IPATH_IB_CFG_HRTBT 1 /* Get/set Heartbeat off/enable/auto */
#define IPATH_IB_HRTBT_ON 3 /* Heartbeat enabled, sent every 100msec */
#define IPATH_IB_HRTBT_OFF 0 /* Heartbeat off */
#define IPATH_IB_CFG_LWID_ENB 2 /* Get/set allowed Link-width */
#define IPATH_IB_CFG_LWID 3 /* Get currently active Link-width */
#define IPATH_IB_CFG_SPD_ENB 4 /* Get/set allowed Link speeds */
#define IPATH_IB_CFG_SPD 5 /* Get current Link spd */
#define IPATH_IB_CFG_RXPOL_ENB 6 /* Get/set Auto-RX-polarity enable */
#define IPATH_IB_CFG_LREV_ENB 7 /* Get/set Auto-Lane-reversal enable */
#define IPATH_IB_CFG_LINKLATENCY 8 /* Get Auto-Lane-reversal enable */


struct ipath_devdata {
	struct list_head ipath_list;

	struct ipath_kregs const *ipath_kregs;
	struct ipath_cregs const *ipath_cregs;

	/* mem-mapped pointer to base of chip regs */
	u64 __iomem *ipath_kregbase;
	/* end of mem-mapped chip space; range checking */
	u64 __iomem *ipath_kregend;
	/* physical address of chip for io_remap, etc. */
	unsigned long ipath_physaddr;
	/* base of memory alloced for ipath_kregbase, for free */
	u64 *ipath_kregalloc;
	/*
	 * virtual address where port0 rcvhdrqtail updated for this unit.
	 * only written to by the chip, not the driver.
	 */
	volatile __le64 *ipath_hdrqtailptr;
	/* ipath_cfgports pointers */
	struct ipath_portdata **ipath_pd;
	/* sk_buffs used by port 0 eager receive queue */
	struct ipath_skbinfo *ipath_port0_skbinfo;
	/* kvirt address of 1st 2k pio buffer */
	void __iomem *ipath_pio2kbase;
	/* kvirt address of 1st 4k pio buffer */
	void __iomem *ipath_pio4kbase;
	/*
	 * points to area where PIOavail registers will be DMA'ed.
	 * Has to be on a page of it's own, because the page will be
	 * mapped into user program space.  This copy is *ONLY* ever
	 * written by DMA, not by the driver!  Need a copy per device
	 * when we get to multiple devices
	 */
	volatile __le64 *ipath_pioavailregs_dma;
	/* physical address where updates occur */
	dma_addr_t ipath_pioavailregs_phys;
	struct _ipath_layer ipath_layer;
	/* setup intr */
	int (*ipath_f_intrsetup)(struct ipath_devdata *);
	/* fallback to alternate interrupt type if possible */
	int (*ipath_f_intr_fallback)(struct ipath_devdata *);
	/* setup on-chip bus config */
	int (*ipath_f_bus)(struct ipath_devdata *, struct pci_dev *);
	/* hard reset chip */
	int (*ipath_f_reset)(struct ipath_devdata *);
	int (*ipath_f_get_boardname)(struct ipath_devdata *, char *,
				     size_t);
	void (*ipath_f_init_hwerrors)(struct ipath_devdata *);
	void (*ipath_f_handle_hwerrors)(struct ipath_devdata *, char *,
					size_t);
	void (*ipath_f_quiet_serdes)(struct ipath_devdata *);
	int (*ipath_f_bringup_serdes)(struct ipath_devdata *);
	int (*ipath_f_early_init)(struct ipath_devdata *);
	void (*ipath_f_clear_tids)(struct ipath_devdata *, unsigned);
	void (*ipath_f_put_tid)(struct ipath_devdata *, u64 __iomem*,
				u32, unsigned long);
	void (*ipath_f_tidtemplate)(struct ipath_devdata *);
	void (*ipath_f_cleanup)(struct ipath_devdata *);
	void (*ipath_f_setextled)(struct ipath_devdata *, u64, u64);
	/* fill out chip-specific fields */
	int (*ipath_f_get_base_info)(struct ipath_portdata *, void *);
	/* free irq */
	void (*ipath_f_free_irq)(struct ipath_devdata *);
	struct ipath_message_header *(*ipath_f_get_msgheader)
					(struct ipath_devdata *, __le32 *);
	void (*ipath_f_config_ports)(struct ipath_devdata *, ushort);
	int (*ipath_f_get_ib_cfg)(struct ipath_devdata *, int);
	int (*ipath_f_set_ib_cfg)(struct ipath_devdata *, int, u32);
	void (*ipath_f_config_jint)(struct ipath_devdata *, u16 , u16);
	void (*ipath_f_read_counters)(struct ipath_devdata *,
					struct infinipath_counters *);
	void (*ipath_f_xgxs_reset)(struct ipath_devdata *);
	/* per chip actions needed for IB Link up/down changes */
	int (*ipath_f_ib_updown)(struct ipath_devdata *, int, u64);

	struct ipath_ibdev *verbs_dev;
	struct timer_list verbs_timer;
	/* total dwords sent (summed from counter) */
	u64 ipath_sword;
	/* total dwords rcvd (summed from counter) */
	u64 ipath_rword;
	/* total packets sent (summed from counter) */
	u64 ipath_spkts;
	/* total packets rcvd (summed from counter) */
	u64 ipath_rpkts;
	/* ipath_statusp initially points to this. */
	u64 _ipath_status;
	/* GUID for this interface, in network order */
	__be64 ipath_guid;
	/*
	 * aggregrate of error bits reported since last cleared, for
	 * limiting of error reporting
	 */
	ipath_err_t ipath_lasterror;
	/*
	 * aggregrate of error bits reported since last cleared, for
	 * limiting of hwerror reporting
	 */
	ipath_err_t ipath_lasthwerror;
	/* errors masked because they occur too fast */
	ipath_err_t ipath_maskederrs;
	u64 ipath_lastlinkrecov; /* link recoveries at last ACTIVE */
	/* time in jiffies at which to re-enable maskederrs */
	unsigned long ipath_unmasktime;
	/* count of egrfull errors, combined for all ports */
	u64 ipath_last_tidfull;
	/* for ipath_qcheck() */
	u64 ipath_lastport0rcv_cnt;
	/* template for writing TIDs  */
	u64 ipath_tidtemplate;
	/* value to write to free TIDs */
	u64 ipath_tidinvalid;
	/* IBA6120 rcv interrupt setup */
	u64 ipath_rhdrhead_intr_off;

	/* size of memory at ipath_kregbase */
	u32 ipath_kregsize;
	/* number of registers used for pioavail */
	u32 ipath_pioavregs;
	/* IPATH_POLL, etc. */
	u32 ipath_flags;
	/* ipath_flags driver is waiting for */
	u32 ipath_state_wanted;
	/* last buffer for user use, first buf for kernel use is this
	 * index. */
	u32 ipath_lastport_piobuf;
	/* is a stats timer active */
	u32 ipath_stats_timer_active;
	/* number of interrupts for this device -- saturates... */
	u32 ipath_int_counter;
	/* dwords sent read from counter */
	u32 ipath_lastsword;
	/* dwords received read from counter */
	u32 ipath_lastrword;
	/* sent packets read from counter */
	u32 ipath_lastspkts;
	/* received packets read from counter */
	u32 ipath_lastrpkts;
	/* pio bufs allocated per port */
	u32 ipath_pbufsport;
	/*
	 * number of ports configured as max; zero is set to number chip
	 * supports, less gives more pio bufs/port, etc.
	 */
	u32 ipath_cfgports;
	/* count of port 0 hdrqfull errors */
	u32 ipath_p0_hdrqfull;
	/* port 0 number of receive eager buffers */
	u32 ipath_p0_rcvegrcnt;

	/*
	 * index of last piobuffer we used.  Speeds up searching, by
	 * starting at this point.  Doesn't matter if multiple cpu's use and
	 * update, last updater is only write that matters.  Whenever it
	 * wraps, we update shadow copies.  Need a copy per device when we
	 * get to multiple devices
	 */
	u32 ipath_lastpioindex;
	u32 ipath_lastpioindexl;
	/* max length of freezemsg */
	u32 ipath_freezelen;
	/*
	 * consecutive times we wanted a PIO buffer but were unable to
	 * get one
	 */
	u32 ipath_consec_nopiobuf;
	/*
	 * hint that we should update ipath_pioavailshadow before
	 * looking for a PIO buffer
	 */
	u32 ipath_upd_pio_shadow;
	/* so we can rewrite it after a chip reset */
	u32 ipath_pcibar0;
	/* so we can rewrite it after a chip reset */
	u32 ipath_pcibar1;

	/* interrupt number */
	int ipath_irq;
	/* HT/PCI Vendor ID (here for NodeInfo) */
	u16 ipath_vendorid;
	/* HT/PCI Device ID (here for NodeInfo) */
	u16 ipath_deviceid;
	/* offset in HT config space of slave/primary interface block */
	u8 ipath_ht_slave_off;
	/* for write combining settings */
	unsigned long ipath_wc_cookie;
	unsigned long ipath_wc_base;
	unsigned long ipath_wc_len;
	/* ref count for each pkey */
	atomic_t ipath_pkeyrefs[4];
	/* shadow copy of struct page *'s for exp tid pages */
	struct page **ipath_pageshadow;
	/* shadow copy of dma handles for exp tid pages */
	dma_addr_t *ipath_physshadow;
	u64 __iomem *ipath_egrtidbase;
	/* lock to workaround chip bug 9437 and others */
	spinlock_t ipath_kernel_tid_lock;
	spinlock_t ipath_tid_lock;
	spinlock_t ipath_sendctrl_lock;

	/*
	 * IPATH_STATUS_*,
	 * this address is mapped readonly into user processes so they can
	 * get status cheaply, whenever they want.
	 */
	u64 *ipath_statusp;
	/* freeze msg if hw error put chip in freeze */
	char *ipath_freezemsg;
	/* pci access data structure */
	struct pci_dev *pcidev;
	struct cdev *user_cdev;
	struct cdev *diag_cdev;
	struct class_device *user_class_dev;
	struct class_device *diag_class_dev;
	/* timer used to prevent stats overflow, error throttling, etc. */
	struct timer_list ipath_stats_timer;
	void *ipath_dummy_hdrq;	/* used after port close */
	dma_addr_t ipath_dummy_hdrq_phys;

	unsigned long ipath_ureg_align; /* user register alignment */

	/* HoL blocking / user app forward-progress state */
	unsigned          ipath_hol_state;
	unsigned          ipath_hol_next;
	struct timer_list ipath_hol_timer;

	/*
	 * Shadow copies of registers; size indicates read access size.
	 * Most of them are readonly, but some are write-only register,
	 * where we manipulate the bits in the shadow copy, and then write
	 * the shadow copy to infinipath.
	 *
	 * We deliberately make most of these 32 bits, since they have
	 * restricted range.  For any that we read, we won't to generate 32
	 * bit accesses, since Opteron will generate 2 separate 32 bit HT
	 * transactions for a 64 bit read, and we want to avoid unnecessary
	 * HT transactions.
	 */

	/* This is the 64 bit group */

	/*
	 * shadow of pioavail, check to be sure it's large enough at
	 * init time.
	 */
	unsigned long ipath_pioavailshadow[8];
	/* bitmap of send buffers available for the kernel to use with PIO. */
	unsigned long ipath_pioavailkernel[8];
	/* shadow of kr_gpio_out, for rmw ops */
	u64 ipath_gpio_out;
	/* shadow the gpio mask register */
	u64 ipath_gpio_mask;
	/* shadow the gpio output enable, etc... */
	u64 ipath_extctrl;
	/* kr_revision shadow */
	u64 ipath_revision;
	/*
	 * shadow of ibcctrl, for interrupt handling of link changes,
	 * etc.
	 */
	u64 ipath_ibcctrl;
	/*
	 * last ibcstatus, to suppress "duplicate" status change messages,
	 * mostly from 2 to 3
	 */
	u64 ipath_lastibcstat;
	/* hwerrmask shadow */
	ipath_err_t ipath_hwerrmask;
	ipath_err_t ipath_errormask; /* errormask shadow */
	/* interrupt config reg shadow */
	u64 ipath_intconfig;
	/* kr_sendpiobufbase value */
	u64 ipath_piobufbase;

	/* these are the "32 bit" regs */

	/*
	 * number of GUIDs in the flash for this interface; may need some
	 * rethinking for setting on other ifaces
	 */
	u32 ipath_nguid;
	/*
	 * the following two are 32-bit bitmasks, but {test,clear,set}_bit
	 * all expect bit fields to be "unsigned long"
	 */
	/* shadow kr_rcvctrl */
	unsigned long ipath_rcvctrl;
	/* shadow kr_sendctrl */
	unsigned long ipath_sendctrl;
	unsigned long ipath_lastcancel; /* to not count armlaunch after cancel */

	/* value we put in kr_rcvhdrcnt */
	u32 ipath_rcvhdrcnt;
	/* value we put in kr_rcvhdrsize */
	u32 ipath_rcvhdrsize;
	/* value we put in kr_rcvhdrentsize */
	u32 ipath_rcvhdrentsize;
	/* offset of last entry in rcvhdrq */
	u32 ipath_hdrqlast;
	/* kr_portcnt value */
	u32 ipath_portcnt;
	/* kr_pagealign value */
	u32 ipath_palign;
	/* number of "2KB" PIO buffers */
	u32 ipath_piobcnt2k;
	/* size in bytes of "2KB" PIO buffers */
	u32 ipath_piosize2k;
	/* number of "4KB" PIO buffers */
	u32 ipath_piobcnt4k;
	/* size in bytes of "4KB" PIO buffers */
	u32 ipath_piosize4k;
	/* kr_rcvegrbase value */
	u32 ipath_rcvegrbase;
	/* kr_rcvegrcnt value */
	u32 ipath_rcvegrcnt;
	/* kr_rcvtidbase value */
	u32 ipath_rcvtidbase;
	/* kr_rcvtidcnt value */
	u32 ipath_rcvtidcnt;
	/* kr_sendregbase */
	u32 ipath_sregbase;
	/* kr_userregbase */
	u32 ipath_uregbase;
	/* kr_counterregbase */
	u32 ipath_cregbase;
	/* shadow the control register contents */
	u32 ipath_control;
	/* PCI revision register (HTC rev on FPGA) */
	u32 ipath_pcirev;

	/* chip address space used by 4k pio buffers */
	u32 ipath_4kalign;
	/* The MTU programmed for this unit */
	u32 ipath_ibmtu;
	/*
	 * The max size IB packet, included IB headers that we can send.
	 * Starts same as ipath_piosize, but is affected when ibmtu is
	 * changed, or by size of eager buffers
	 */
	u32 ipath_ibmaxlen;
	/*
	 * ibmaxlen at init time, limited by chip and by receive buffer
	 * size.  Not changed after init.
	 */
	u32 ipath_init_ibmaxlen;
	/* size of each rcvegrbuffer */
	u32 ipath_rcvegrbufsize;
	/* localbus width (1, 2,4,8,16,32) from config space  */
	u32 ipath_lbus_width;
	/* localbus speed (HT: 200,400,800,1000; PCIe 2500) */
	u32 ipath_lbus_speed;
	/*
	 * number of sequential ibcstatus change for polling active/quiet
	 * (i.e., link not coming up).
	 */
	u32 ipath_ibpollcnt;
	/* low and high portions of MSI capability/vector */
	u32 ipath_msi_lo;
	/* saved after PCIe init for restore after reset */
	u32 ipath_msi_hi;
	/* MSI data (vector) saved for restore */
	u16 ipath_msi_data;
	/* MLID programmed for this instance */
	u16 ipath_mlid;
	/* LID programmed for this instance */
	u16 ipath_lid;
	/* list of pkeys programmed; 0 if not set */
	u16 ipath_pkeys[4];
	/*
	 * ASCII serial number, from flash, large enough for original
	 * all digit strings, and longer QLogic serial number format
	 */
	u8 ipath_serial[16];
	/* human readable board version */
	u8 ipath_boardversion[80];
	u8 ipath_lbus_info[32]; /* human readable localbus info */
	/* chip major rev, from ipath_revision */
	u8 ipath_majrev;
	/* chip minor rev, from ipath_revision */
	u8 ipath_minrev;
	/* board rev, from ipath_revision */
	u8 ipath_boardrev;

	u8 ipath_r_portenable_shift;
	u8 ipath_r_intravail_shift;
	u8 ipath_r_tailupd_shift;
	u8 ipath_r_portcfg_shift;

	/* unit # of this chip, if present */
	int ipath_unit;
	/* saved for restore after reset */
	u8 ipath_pci_cacheline;
	/* LID mask control */
	u8 ipath_lmc;
	/* link width supported */
	u8 ipath_link_width_supported;
	/* link speed supported */
	u8 ipath_link_speed_supported;
	u8 ipath_link_width_enabled;
	u8 ipath_link_speed_enabled;
	u8 ipath_link_width_active;
	u8 ipath_link_speed_active;
	/* Rx Polarity inversion (compensate for ~tx on partner) */
	u8 ipath_rx_pol_inv;

	/* local link integrity counter */
	u32 ipath_lli_counter;
	/* local link integrity errors */
	u32 ipath_lli_errors;
	/*
	 * Above counts only cases where _successive_ LocalLinkIntegrity
	 * errors were seen in the receive headers of kern-packets.
	 * Below are the three (monotonically increasing) counters
	 * maintained via GPIO interrupts on iba6120-rev2.
	 */
	u32 ipath_rxfc_unsupvl_errs;
	u32 ipath_overrun_thresh_errs;
	u32 ipath_lli_errs;

	/* status check work */
	struct delayed_work status_work;

	/*
	 * Not all devices managed by a driver instance are the same
	 * type, so these fields must be per-device.
	 */
	u64 ipath_i_bitsextant;
	ipath_err_t ipath_e_bitsextant;
	ipath_err_t ipath_hwe_bitsextant;

	/*
	 * Below should be computable from number of ports,
	 * since they are never modified.
	 */
	u32 ipath_i_rcvavail_mask;
	u32 ipath_i_rcvurg_mask;
	u16 ipath_i_rcvurg_shift;
	u16 ipath_i_rcvavail_shift;

	/*
	 * Register bits for selecting i2c direction and values, used for
	 * I2C serial flash.
	 */
	u8 ipath_gpio_sda_num;
	u8 ipath_gpio_scl_num;
	u8 ipath_i2c_chain_type;
	u64 ipath_gpio_sda;
	u64 ipath_gpio_scl;

	/* lock for doing RMW of shadows/regs for ExtCtrl and GPIO */
	spinlock_t ipath_gpio_lock;

	/*
	 * IB link and linktraining states and masks that vary per chip in
	 * some way.  Set at init, to avoid each IB status change interrupt
	 */
	u8 ibcs_ls_shift;
	u8 ibcs_lts_mask;
	u32 ibcs_mask;
	u32 ib_init;
	u32 ib_arm;
	u32 ib_active;

	u16 ipath_rhf_offset; /* offset of RHF within receive header entry */

	/*
	 * shift/mask for linkcmd, linkinitcmd, maxpktlen in ibccontol
	 * reg. Changes for IBA7220
	 */
	u8 ibcc_lic_mask; /* LinkInitCmd */
	u8 ibcc_lc_shift; /* LinkCmd */
	u8 ibcc_mpl_shift; /* Maxpktlen */

	u8 delay_mult;

	/* used to override LED behavior */
	u8 ipath_led_override;  /* Substituted for normal value, if non-zero */
	u16 ipath_led_override_timeoff; /* delta to next timer event */
	u8 ipath_led_override_vals[2]; /* Alternates per blink-frame */
	u8 ipath_led_override_phase; /* Just counts, LSB picks from vals[] */
	atomic_t ipath_led_override_timer_active;
	/* Used to flash LEDs in override mode */
	struct timer_list ipath_led_override_timer;

	/* Support (including locks) for EEPROM logging of errors and time */
	/* control access to actual counters, timer */
	spinlock_t ipath_eep_st_lock;
	/* control high-level access to EEPROM */
	struct mutex ipath_eep_lock;
	/* Below inc'd by ipath_snap_cntrs(), locked by ipath_eep_st_lock */
	uint64_t ipath_traffic_wds;
	/* active time is kept in seconds, but logged in hours */
	atomic_t ipath_active_time;
	/* Below are nominal shadow of EEPROM, new since last EEPROM update */
	uint8_t ipath_eep_st_errs[IPATH_EEP_LOG_CNT];
	uint8_t ipath_eep_st_new_errs[IPATH_EEP_LOG_CNT];
	uint16_t ipath_eep_hrs;
	/*
	 * masks for which bits of errs, hwerrs that cause
	 * each of the counters to increment.
	 */
	struct ipath_eep_log_mask ipath_eep_st_masks[IPATH_EEP_LOG_CNT];

	/* interrupt mitigation reload register info */
	u16 ipath_jint_idle_ticks;	/* idle clock ticks */
	u16 ipath_jint_max_packets;	/* max packets across all ports */
};

/* ipath_hol_state values (stopping/starting user proc, send flushing) */
#define IPATH_HOL_UP       0
#define IPATH_HOL_DOWN     1
/* ipath_hol_next toggle values, used when hol_state IPATH_HOL_DOWN */
#define IPATH_HOL_DOWNSTOP 0
#define IPATH_HOL_DOWNCONT 1

/* Private data for file operations */
struct ipath_filedata {
	struct ipath_portdata *pd;
	unsigned subport;
	unsigned tidcursor;
};
extern struct list_head ipath_dev_list;
extern spinlock_t ipath_devs_lock;
extern struct ipath_devdata *ipath_lookup(int unit);

int ipath_init_chip(struct ipath_devdata *, int);
int ipath_enable_wc(struct ipath_devdata *dd);
void ipath_disable_wc(struct ipath_devdata *dd);
int ipath_count_units(int *npresentp, int *nupp, int *maxportsp);
void ipath_shutdown_device(struct ipath_devdata *);
void ipath_clear_freeze(struct ipath_devdata *);

struct file_operations;
int ipath_cdev_init(int minor, char *name, const struct file_operations *fops,
		    struct cdev **cdevp, struct class_device **class_devp);
void ipath_cdev_cleanup(struct cdev **cdevp,
			struct class_device **class_devp);

int ipath_diag_add(struct ipath_devdata *);
void ipath_diag_remove(struct ipath_devdata *);

extern wait_queue_head_t ipath_state_wait;

int ipath_user_add(struct ipath_devdata *dd);
void ipath_user_remove(struct ipath_devdata *dd);

struct sk_buff *ipath_alloc_skb(struct ipath_devdata *dd, gfp_t);

extern int ipath_diag_inuse;

irqreturn_t ipath_intr(int irq, void *devid);
int ipath_decode_err(char *buf, size_t blen, ipath_err_t err);
#if __IPATH_INFO || __IPATH_DBG
extern const char *ipath_ibcstatus_str[];
#endif

/* clean up any per-chip chip-specific stuff */
void ipath_chip_cleanup(struct ipath_devdata *);
/* clean up any chip type-specific stuff */
void ipath_chip_done(void);

/* check to see if we have to force ordering for write combining */
int ipath_unordered_wc(void);

void ipath_disarm_piobufs(struct ipath_devdata *, unsigned first,
			  unsigned cnt);
void ipath_cancel_sends(struct ipath_devdata *, int);

int ipath_create_rcvhdrq(struct ipath_devdata *, struct ipath_portdata *);
void ipath_free_pddata(struct ipath_devdata *, struct ipath_portdata *);

int ipath_parse_ushort(const char *str, unsigned short *valp);

void ipath_kreceive(struct ipath_portdata *);
int ipath_setrcvhdrsize(struct ipath_devdata *, unsigned);
int ipath_reset_device(int);
void ipath_get_faststats(unsigned long);
int ipath_wait_linkstate(struct ipath_devdata *, u32, int);
int ipath_set_linkstate(struct ipath_devdata *, u8);
int ipath_set_mtu(struct ipath_devdata *, u16);
int ipath_set_lid(struct ipath_devdata *, u32, u8);
int ipath_set_rx_pol_inv(struct ipath_devdata *dd, u8 new_pol_inv);
void ipath_enable_armlaunch(struct ipath_devdata *);
void ipath_disable_armlaunch(struct ipath_devdata *);
void ipath_hol_down(struct ipath_devdata *);
void ipath_hol_up(struct ipath_devdata *);
void ipath_hol_event(unsigned long);

/* for use in system calls, where we want to know device type, etc. */
#define port_fp(fp) ((struct ipath_filedata *)(fp)->private_data)->pd
#define subport_fp(fp) \
	((struct ipath_filedata *)(fp)->private_data)->subport
#define tidcursor_fp(fp) \
	((struct ipath_filedata *)(fp)->private_data)->tidcursor

/*
 * values for ipath_flags
 */
		/* chip can report link latency (IB 1.2) */
#define IPATH_HAS_LINK_LATENCY 0x1
/* The chip is up and initted */
#define IPATH_INITTED       0x2
		/* set if any user code has set kr_rcvhdrsize */
#define IPATH_RCVHDRSZ_SET  0x4
		/* The chip is present and valid for accesses */
#define IPATH_PRESENT       0x8
		/* HT link0 is only 8 bits wide, ignore upper byte crc
		 * errors, etc. */
#define IPATH_8BIT_IN_HT0   0x10
		/* HT link1 is only 8 bits wide, ignore upper byte crc
		 * errors, etc. */
#define IPATH_8BIT_IN_HT1   0x20
		/* The link is down */
#define IPATH_LINKDOWN      0x40
		/* The link level is up (0x11) */
#define IPATH_LINKINIT      0x80
		/* The link is in the armed (0x21) state */
#define IPATH_LINKARMED     0x100
		/* The link is in the active (0x31) state */
#define IPATH_LINKACTIVE    0x200
		/* link current state is unknown */
#define IPATH_LINKUNK       0x400
		/* Write combining flush needed for PIO */
#define IPATH_PIO_FLUSH_WC  0x1000
		/* no IB cable, or no device on IB cable */
#define IPATH_NOCABLE       0x4000
		/* Supports port zero per packet receive interrupts via
		 * GPIO */
#define IPATH_GPIO_INTR     0x8000
		/* uses the coded 4byte TID, not 8 byte */
#define IPATH_4BYTE_TID     0x10000
		/* packet/word counters are 32 bit, else those 4 counters
		 * are 64bit */
#define IPATH_32BITCOUNTERS 0x20000
		/* can miss port0 rx interrupts */
		/* Interrupt register is 64 bits */
#define IPATH_INTREG_64     0x40000
#define IPATH_DISABLED      0x80000 /* administratively disabled */
		/* Use GPIO interrupts for new counters */
#define IPATH_GPIO_ERRINTRS 0x100000
#define IPATH_SWAP_PIOBUFS  0x200000
		/* Suppress heartbeat, even if turning off loopback */
#define IPATH_NO_HRTBT      0x1000000
#define IPATH_HAS_MULT_IB_SPEED 0x8000000
		/* Linkdown-disable intentionally, Do not attempt to bring up */
#define IPATH_IB_LINK_DISABLED 0x40000000
#define IPATH_IB_FORCE_NOTIFY 0x80000000 /* force notify on next ib change */

/* Bits in GPIO for the added interrupts */
#define IPATH_GPIO_PORT0_BIT 2
#define IPATH_GPIO_RXUVL_BIT 3
#define IPATH_GPIO_OVRUN_BIT 4
#define IPATH_GPIO_LLI_BIT 5
#define IPATH_GPIO_ERRINTR_MASK 0x38

/* portdata flag bit offsets */
		/* waiting for a packet to arrive */
#define IPATH_PORT_WAITING_RCV   2
		/* master has not finished initializing */
#define IPATH_PORT_MASTER_UNINIT 4
		/* waiting for an urgent packet to arrive */
#define IPATH_PORT_WAITING_URG 5

/* free up any allocated data at closes */
void ipath_free_data(struct ipath_portdata *dd);
u32 __iomem *ipath_getpiobuf(struct ipath_devdata *, u32, u32 *);
void ipath_chg_pioavailkernel(struct ipath_devdata *dd, unsigned start,
				unsigned len, int avail);
void ipath_init_iba6120_funcs(struct ipath_devdata *);
void ipath_init_iba6110_funcs(struct ipath_devdata *);
void ipath_get_eeprom_info(struct ipath_devdata *);
int ipath_update_eeprom_log(struct ipath_devdata *dd);
void ipath_inc_eeprom_err(struct ipath_devdata *dd, u32 eidx, u32 incr);
u64 ipath_snap_cntr(struct ipath_devdata *, ipath_creg);
void ipath_force_pio_avail_update(struct ipath_devdata *);
void signal_ib_event(struct ipath_devdata *dd, enum ib_event_type ev);

/*
 * Set LED override, only the two LSBs have "public" meaning, but
 * any non-zero value substitutes them for the Link and LinkTrain
 * LED states.
 */
#define IPATH_LED_PHYS 1 /* Physical (linktraining) GREEN LED */
#define IPATH_LED_LOG 2  /* Logical (link) YELLOW LED */
void ipath_set_led_override(struct ipath_devdata *dd, unsigned int val);

/*
 * number of words used for protocol header if not set by ipath_userinit();
 */
#define IPATH_DFLT_RCVHDRSIZE 9

int ipath_get_user_pages(unsigned long, size_t, struct page **);
void ipath_release_user_pages(struct page **, size_t);
void ipath_release_user_pages_on_close(struct page **, size_t);
int ipath_eeprom_read(struct ipath_devdata *, u8, void *, int);
int ipath_eeprom_write(struct ipath_devdata *, u8, const void *, int);
int ipath_tempsense_read(struct ipath_devdata *, u8 regnum);
int ipath_tempsense_write(struct ipath_devdata *, u8 regnum, u8 data);

/* these are used for the registers that vary with port */
void ipath_write_kreg_port(const struct ipath_devdata *, ipath_kreg,
			   unsigned, u64);

/*
 * We could have a single register get/put routine, that takes a group type,
 * but this is somewhat clearer and cleaner.  It also gives us some error
 * checking.  64 bit register reads should always work, but are inefficient
 * on opteron (the northbridge always generates 2 separate HT 32 bit reads),
 * so we use kreg32 wherever possible.  User register and counter register
 * reads are always 32 bit reads, so only one form of those routines.
 */

/*
 * At the moment, none of the s-registers are writable, so no
 * ipath_write_sreg(), and none of the c-registers are writable, so no
 * ipath_write_creg().
 */

/**
 * ipath_read_ureg32 - read 32-bit virtualized per-port register
 * @dd: device
 * @regno: register number
 * @port: port number
 *
 * Return the contents of a register that is virtualized to be per port.
 * Returns -1 on errors (not distinguishable from valid contents at
 * runtime; we may add a separate error variable at some point).
 */
static inline u32 ipath_read_ureg32(const struct ipath_devdata *dd,
				    ipath_ureg regno, int port)
{
	if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
		return 0;

	return readl(regno + (u64 __iomem *)
		     (dd->ipath_uregbase +
		      (char __iomem *)dd->ipath_kregbase +
		      dd->ipath_ureg_align * port));
}

/**
 * ipath_write_ureg - write 32-bit virtualized per-port register
 * @dd: device
 * @regno: register number
 * @value: value
 * @port: port
 *
 * Write the contents of a register that is virtualized to be per port.
 */
static inline void ipath_write_ureg(const struct ipath_devdata *dd,
				    ipath_ureg regno, u64 value, int port)
{
	u64 __iomem *ubase = (u64 __iomem *)
		(dd->ipath_uregbase + (char __iomem *) dd->ipath_kregbase +
		 dd->ipath_ureg_align * port);
	if (dd->ipath_kregbase)
		writeq(value, &ubase[regno]);
}

static inline u32 ipath_read_kreg32(const struct ipath_devdata *dd,
				    ipath_kreg regno)
{
	if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
		return -1;
	return readl((u32 __iomem *) & dd->ipath_kregbase[regno]);
}

static inline u64 ipath_read_kreg64(const struct ipath_devdata *dd,
				    ipath_kreg regno)
{
	if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
		return -1;

	return readq(&dd->ipath_kregbase[regno]);
}

static inline void ipath_write_kreg(const struct ipath_devdata *dd,
				    ipath_kreg regno, u64 value)
{
	if (dd->ipath_kregbase)
		writeq(value, &dd->ipath_kregbase[regno]);
}

static inline u64 ipath_read_creg(const struct ipath_devdata *dd,
				  ipath_sreg regno)
{
	if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
		return 0;

	return readq(regno + (u64 __iomem *)
		     (dd->ipath_cregbase +
		      (char __iomem *)dd->ipath_kregbase));
}

static inline u32 ipath_read_creg32(const struct ipath_devdata *dd,
					 ipath_sreg regno)
{
	if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
		return 0;
	return readl(regno + (u64 __iomem *)
		     (dd->ipath_cregbase +
		      (char __iomem *)dd->ipath_kregbase));
}

static inline void ipath_write_creg(const struct ipath_devdata *dd,
				    ipath_creg regno, u64 value)
{
	if (dd->ipath_kregbase)
		writeq(value, regno + (u64 __iomem *)
		       (dd->ipath_cregbase +
			(char __iomem *)dd->ipath_kregbase));
}

static inline void ipath_clear_rcvhdrtail(const struct ipath_portdata *pd)
{
	*((u64 *) pd->port_rcvhdrtail_kvaddr) = 0ULL;
}

static inline u32 ipath_get_rcvhdrtail(const struct ipath_portdata *pd)
{
	return (u32) le64_to_cpu(*((volatile __le64 *)
				pd->port_rcvhdrtail_kvaddr));
}

static inline u64 ipath_read_ireg(const struct ipath_devdata *dd, ipath_kreg r)
{
	return (dd->ipath_flags & IPATH_INTREG_64) ?
		ipath_read_kreg64(dd, r) : ipath_read_kreg32(dd, r);
}

/*
 * from contents of IBCStatus (or a saved copy), return linkstate
 * Report ACTIVE_DEFER as ACTIVE, because we treat them the same
 * everywhere, anyway (and should be, for almost all purposes).
 */
static inline u32 ipath_ib_linkstate(struct ipath_devdata *dd, u64 ibcs)
{
	u32 state = (u32)(ibcs >> dd->ibcs_ls_shift) &
		INFINIPATH_IBCS_LINKSTATE_MASK;
	if (state == INFINIPATH_IBCS_L_STATE_ACT_DEFER)
		state = INFINIPATH_IBCS_L_STATE_ACTIVE;
	return state;
}

/* from contents of IBCStatus (or a saved copy), return linktrainingstate */
static inline u32 ipath_ib_linktrstate(struct ipath_devdata *dd, u64 ibcs)
{
	return (u32)(ibcs >> INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) &
		dd->ibcs_lts_mask;
}

/*
 * from contents of IBCStatus (or a saved copy), return logical link state
 * combination of link state and linktraining state (down, active, init,
 * arm, etc.
 */
static inline u32 ipath_ib_state(struct ipath_devdata *dd, u64 ibcs)
{
	u32 ibs;
	ibs = (u32)(ibcs >> INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) &
		dd->ibcs_lts_mask;
	ibs |= (u32)(ibcs &
		(INFINIPATH_IBCS_LINKSTATE_MASK << dd->ibcs_ls_shift));
	return ibs;
}

/*
 * sysfs interface.
 */

struct device_driver;

extern const char ib_ipath_version[];

extern struct attribute_group *ipath_driver_attr_groups[];

int ipath_device_create_group(struct device *, struct ipath_devdata *);
void ipath_device_remove_group(struct device *, struct ipath_devdata *);
int ipath_expose_reset(struct device *);

int ipath_init_ipathfs(void);
void ipath_exit_ipathfs(void);
int ipathfs_add_device(struct ipath_devdata *);
int ipathfs_remove_device(struct ipath_devdata *);

/*
 * dma_addr wrappers - all 0's invalid for hw
 */
dma_addr_t ipath_map_page(struct pci_dev *, struct page *, unsigned long,
			  size_t, int);
dma_addr_t ipath_map_single(struct pci_dev *, void *, size_t, int);

/*
 * Flush write combining store buffers (if present) and perform a write
 * barrier.
 */
#if defined(CONFIG_X86_64)
#define ipath_flush_wc() asm volatile("sfence" ::: "memory")
#else
#define ipath_flush_wc() wmb()
#endif

extern unsigned ipath_debug; /* debugging bit mask */
extern unsigned ipath_linkrecovery;
extern unsigned ipath_mtu4096;

#define IPATH_MAX_PARITY_ATTEMPTS 10000 /* max times to try recovery */

const char *ipath_get_unit_name(int unit);

extern struct mutex ipath_mutex;

#define IPATH_DRV_NAME		"ib_ipath"
#define IPATH_MAJOR		233
#define IPATH_USER_MINOR_BASE	0
#define IPATH_DIAGPKT_MINOR	127
#define IPATH_DIAG_MINOR_BASE	129
#define IPATH_NMINORS		255

#define ipath_dev_err(dd,fmt,...) \
	do { \
		const struct ipath_devdata *__dd = (dd); \
		if (__dd->pcidev) \
			dev_err(&__dd->pcidev->dev, "%s: " fmt, \
				ipath_get_unit_name(__dd->ipath_unit), \
				##__VA_ARGS__); \
		else \
			printk(KERN_ERR IPATH_DRV_NAME ": %s: " fmt, \
			       ipath_get_unit_name(__dd->ipath_unit), \
			       ##__VA_ARGS__); \
	} while (0)

#if _IPATH_DEBUGGING

# define __IPATH_DBG_WHICH(which,fmt,...) \
	do { \
		if(unlikely(ipath_debug&(which))) \
			printk(KERN_DEBUG IPATH_DRV_NAME ": %s: " fmt, \
			       __func__,##__VA_ARGS__); \
	} while(0)

# define ipath_dbg(fmt,...) \
	__IPATH_DBG_WHICH(__IPATH_DBG,fmt,##__VA_ARGS__)
# define ipath_cdbg(which,fmt,...) \
	__IPATH_DBG_WHICH(__IPATH_##which##DBG,fmt,##__VA_ARGS__)

#else /* ! _IPATH_DEBUGGING */

# define ipath_dbg(fmt,...)
# define ipath_cdbg(which,fmt,...)

#endif /* _IPATH_DEBUGGING */

/*
 * this is used for formatting hw error messages...
 */
struct ipath_hwerror_msgs {
	u64 mask;
	const char *msg;
};

#define INFINIPATH_HWE_MSG(a, b) { .mask = INFINIPATH_HWE_##a, .msg = b }

/* in ipath_intr.c... */
void ipath_format_hwerrors(u64 hwerrs,
			   const struct ipath_hwerror_msgs *hwerrmsgs,
			   size_t nhwerrmsgs,
			   char *msg, size_t lmsg);

#endif				/* _IPATH_KERNEL_H */