summaryrefslogtreecommitdiff
path: root/drivers/infiniband/hw/hfi1/sysfs.c
blob: 50d140d25e38fa3cce8b4512b86099c633f1bc6c (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
/*
 * Copyright(c) 2015-2017 Intel Corporation.
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * BSD LICENSE
 *
 * 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.
 *  - Neither the name of Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
#include <linux/ctype.h>

#include "hfi.h"
#include "mad.h"
#include "trace.h"

/*
 * Start of per-port congestion control structures and support code
 */

/*
 * Congestion control table size followed by table entries
 */
static ssize_t read_cc_table_bin(struct file *filp, struct kobject *kobj,
				 struct bin_attribute *bin_attr,
				 char *buf, loff_t pos, size_t count)
{
	int ret;
	struct hfi1_pportdata *ppd =
		container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);
	struct cc_state *cc_state;

	ret = ppd->total_cct_entry * sizeof(struct ib_cc_table_entry_shadow)
		 + sizeof(__be16);

	if (pos > ret)
		return -EINVAL;

	if (count > ret - pos)
		count = ret - pos;

	if (!count)
		return count;

	rcu_read_lock();
	cc_state = get_cc_state(ppd);
	if (!cc_state) {
		rcu_read_unlock();
		return -EINVAL;
	}
	memcpy(buf, (void *)&cc_state->cct + pos, count);
	rcu_read_unlock();

	return count;
}

static void port_release(struct kobject *kobj)
{
	/* nothing to do since memory is freed by hfi1_free_devdata() */
}

static struct bin_attribute cc_table_bin_attr = {
	.attr = {.name = "cc_table_bin", .mode = 0444},
	.read = read_cc_table_bin,
	.size = PAGE_SIZE,
};

/*
 * Congestion settings: port control, control map and an array of 16
 * entries for the congestion entries - increase, timer, event log
 * trigger threshold and the minimum injection rate delay.
 */
static ssize_t read_cc_setting_bin(struct file *filp, struct kobject *kobj,
				   struct bin_attribute *bin_attr,
				   char *buf, loff_t pos, size_t count)
{
	int ret;
	struct hfi1_pportdata *ppd =
		container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);
	struct cc_state *cc_state;

	ret = sizeof(struct opa_congestion_setting_attr_shadow);

	if (pos > ret)
		return -EINVAL;
	if (count > ret - pos)
		count = ret - pos;

	if (!count)
		return count;

	rcu_read_lock();
	cc_state = get_cc_state(ppd);
	if (!cc_state) {
		rcu_read_unlock();
		return -EINVAL;
	}
	memcpy(buf, (void *)&cc_state->cong_setting + pos, count);
	rcu_read_unlock();

	return count;
}

static struct bin_attribute cc_setting_bin_attr = {
	.attr = {.name = "cc_settings_bin", .mode = 0444},
	.read = read_cc_setting_bin,
	.size = PAGE_SIZE,
};

struct hfi1_port_attr {
	struct attribute attr;
	ssize_t	(*show)(struct hfi1_pportdata *, char *);
	ssize_t	(*store)(struct hfi1_pportdata *, const char *, size_t);
};

static ssize_t cc_prescan_show(struct hfi1_pportdata *ppd, char *buf)
{
	return sprintf(buf, "%s\n", ppd->cc_prescan ? "on" : "off");
}

static ssize_t cc_prescan_store(struct hfi1_pportdata *ppd, const char *buf,
				size_t count)
{
	if (!memcmp(buf, "on", 2))
		ppd->cc_prescan = true;
	else if (!memcmp(buf, "off", 3))
		ppd->cc_prescan = false;

	return count;
}

static struct hfi1_port_attr cc_prescan_attr =
		__ATTR(cc_prescan, 0600, cc_prescan_show, cc_prescan_store);

static ssize_t cc_attr_show(struct kobject *kobj, struct attribute *attr,
			    char *buf)
{
	struct hfi1_port_attr *port_attr =
		container_of(attr, struct hfi1_port_attr, attr);
	struct hfi1_pportdata *ppd =
		container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);

	return port_attr->show(ppd, buf);
}

static ssize_t cc_attr_store(struct kobject *kobj, struct attribute *attr,
			     const char *buf, size_t count)
{
	struct hfi1_port_attr *port_attr =
		container_of(attr, struct hfi1_port_attr, attr);
	struct hfi1_pportdata *ppd =
		container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);

	return port_attr->store(ppd, buf, count);
}

static const struct sysfs_ops port_cc_sysfs_ops = {
	.show = cc_attr_show,
	.store = cc_attr_store
};

static struct attribute *port_cc_default_attributes[] = {
	&cc_prescan_attr.attr
};

static struct kobj_type port_cc_ktype = {
	.release = port_release,
	.sysfs_ops = &port_cc_sysfs_ops,
	.default_attrs = port_cc_default_attributes
};

/* Start sc2vl */
#define HFI1_SC2VL_ATTR(N)				    \
	static struct hfi1_sc2vl_attr hfi1_sc2vl_attr_##N = { \
		.attr = { .name = __stringify(N), .mode = 0444 }, \
		.sc = N \
	}

struct hfi1_sc2vl_attr {
	struct attribute attr;
	int sc;
};

HFI1_SC2VL_ATTR(0);
HFI1_SC2VL_ATTR(1);
HFI1_SC2VL_ATTR(2);
HFI1_SC2VL_ATTR(3);
HFI1_SC2VL_ATTR(4);
HFI1_SC2VL_ATTR(5);
HFI1_SC2VL_ATTR(6);
HFI1_SC2VL_ATTR(7);
HFI1_SC2VL_ATTR(8);
HFI1_SC2VL_ATTR(9);
HFI1_SC2VL_ATTR(10);
HFI1_SC2VL_ATTR(11);
HFI1_SC2VL_ATTR(12);
HFI1_SC2VL_ATTR(13);
HFI1_SC2VL_ATTR(14);
HFI1_SC2VL_ATTR(15);
HFI1_SC2VL_ATTR(16);
HFI1_SC2VL_ATTR(17);
HFI1_SC2VL_ATTR(18);
HFI1_SC2VL_ATTR(19);
HFI1_SC2VL_ATTR(20);
HFI1_SC2VL_ATTR(21);
HFI1_SC2VL_ATTR(22);
HFI1_SC2VL_ATTR(23);
HFI1_SC2VL_ATTR(24);
HFI1_SC2VL_ATTR(25);
HFI1_SC2VL_ATTR(26);
HFI1_SC2VL_ATTR(27);
HFI1_SC2VL_ATTR(28);
HFI1_SC2VL_ATTR(29);
HFI1_SC2VL_ATTR(30);
HFI1_SC2VL_ATTR(31);

static struct attribute *sc2vl_default_attributes[] = {
	&hfi1_sc2vl_attr_0.attr,
	&hfi1_sc2vl_attr_1.attr,
	&hfi1_sc2vl_attr_2.attr,
	&hfi1_sc2vl_attr_3.attr,
	&hfi1_sc2vl_attr_4.attr,
	&hfi1_sc2vl_attr_5.attr,
	&hfi1_sc2vl_attr_6.attr,
	&hfi1_sc2vl_attr_7.attr,
	&hfi1_sc2vl_attr_8.attr,
	&hfi1_sc2vl_attr_9.attr,
	&hfi1_sc2vl_attr_10.attr,
	&hfi1_sc2vl_attr_11.attr,
	&hfi1_sc2vl_attr_12.attr,
	&hfi1_sc2vl_attr_13.attr,
	&hfi1_sc2vl_attr_14.attr,
	&hfi1_sc2vl_attr_15.attr,
	&hfi1_sc2vl_attr_16.attr,
	&hfi1_sc2vl_attr_17.attr,
	&hfi1_sc2vl_attr_18.attr,
	&hfi1_sc2vl_attr_19.attr,
	&hfi1_sc2vl_attr_20.attr,
	&hfi1_sc2vl_attr_21.attr,
	&hfi1_sc2vl_attr_22.attr,
	&hfi1_sc2vl_attr_23.attr,
	&hfi1_sc2vl_attr_24.attr,
	&hfi1_sc2vl_attr_25.attr,
	&hfi1_sc2vl_attr_26.attr,
	&hfi1_sc2vl_attr_27.attr,
	&hfi1_sc2vl_attr_28.attr,
	&hfi1_sc2vl_attr_29.attr,
	&hfi1_sc2vl_attr_30.attr,
	&hfi1_sc2vl_attr_31.attr,
	NULL
};

static ssize_t sc2vl_attr_show(struct kobject *kobj, struct attribute *attr,
			       char *buf)
{
	struct hfi1_sc2vl_attr *sattr =
		container_of(attr, struct hfi1_sc2vl_attr, attr);
	struct hfi1_pportdata *ppd =
		container_of(kobj, struct hfi1_pportdata, sc2vl_kobj);
	struct hfi1_devdata *dd = ppd->dd;

	return sprintf(buf, "%u\n", *((u8 *)dd->sc2vl + sattr->sc));
}

static const struct sysfs_ops hfi1_sc2vl_ops = {
	.show = sc2vl_attr_show,
};

static struct kobj_type hfi1_sc2vl_ktype = {
	.release = port_release,
	.sysfs_ops = &hfi1_sc2vl_ops,
	.default_attrs = sc2vl_default_attributes
};

/* End sc2vl */

/* Start sl2sc */
#define HFI1_SL2SC_ATTR(N)				    \
	static struct hfi1_sl2sc_attr hfi1_sl2sc_attr_##N = {	  \
		.attr = { .name = __stringify(N), .mode = 0444 }, \
		.sl = N						  \
	}

struct hfi1_sl2sc_attr {
	struct attribute attr;
	int sl;
};

HFI1_SL2SC_ATTR(0);
HFI1_SL2SC_ATTR(1);
HFI1_SL2SC_ATTR(2);
HFI1_SL2SC_ATTR(3);
HFI1_SL2SC_ATTR(4);
HFI1_SL2SC_ATTR(5);
HFI1_SL2SC_ATTR(6);
HFI1_SL2SC_ATTR(7);
HFI1_SL2SC_ATTR(8);
HFI1_SL2SC_ATTR(9);
HFI1_SL2SC_ATTR(10);
HFI1_SL2SC_ATTR(11);
HFI1_SL2SC_ATTR(12);
HFI1_SL2SC_ATTR(13);
HFI1_SL2SC_ATTR(14);
HFI1_SL2SC_ATTR(15);
HFI1_SL2SC_ATTR(16);
HFI1_SL2SC_ATTR(17);
HFI1_SL2SC_ATTR(18);
HFI1_SL2SC_ATTR(19);
HFI1_SL2SC_ATTR(20);
HFI1_SL2SC_ATTR(21);
HFI1_SL2SC_ATTR(22);
HFI1_SL2SC_ATTR(23);
HFI1_SL2SC_ATTR(24);
HFI1_SL2SC_ATTR(25);
HFI1_SL2SC_ATTR(26);
HFI1_SL2SC_ATTR(27);
HFI1_SL2SC_ATTR(28);
HFI1_SL2SC_ATTR(29);
HFI1_SL2SC_ATTR(30);
HFI1_SL2SC_ATTR(31);

static struct attribute *sl2sc_default_attributes[] = {
	&hfi1_sl2sc_attr_0.attr,
	&hfi1_sl2sc_attr_1.attr,
	&hfi1_sl2sc_attr_2.attr,
	&hfi1_sl2sc_attr_3.attr,
	&hfi1_sl2sc_attr_4.attr,
	&hfi1_sl2sc_attr_5.attr,
	&hfi1_sl2sc_attr_6.attr,
	&hfi1_sl2sc_attr_7.attr,
	&hfi1_sl2sc_attr_8.attr,
	&hfi1_sl2sc_attr_9.attr,
	&hfi1_sl2sc_attr_10.attr,
	&hfi1_sl2sc_attr_11.attr,
	&hfi1_sl2sc_attr_12.attr,
	&hfi1_sl2sc_attr_13.attr,
	&hfi1_sl2sc_attr_14.attr,
	&hfi1_sl2sc_attr_15.attr,
	&hfi1_sl2sc_attr_16.attr,
	&hfi1_sl2sc_attr_17.attr,
	&hfi1_sl2sc_attr_18.attr,
	&hfi1_sl2sc_attr_19.attr,
	&hfi1_sl2sc_attr_20.attr,
	&hfi1_sl2sc_attr_21.attr,
	&hfi1_sl2sc_attr_22.attr,
	&hfi1_sl2sc_attr_23.attr,
	&hfi1_sl2sc_attr_24.attr,
	&hfi1_sl2sc_attr_25.attr,
	&hfi1_sl2sc_attr_26.attr,
	&hfi1_sl2sc_attr_27.attr,
	&hfi1_sl2sc_attr_28.attr,
	&hfi1_sl2sc_attr_29.attr,
	&hfi1_sl2sc_attr_30.attr,
	&hfi1_sl2sc_attr_31.attr,
	NULL
};

static ssize_t sl2sc_attr_show(struct kobject *kobj, struct attribute *attr,
			       char *buf)
{
	struct hfi1_sl2sc_attr *sattr =
		container_of(attr, struct hfi1_sl2sc_attr, attr);
	struct hfi1_pportdata *ppd =
		container_of(kobj, struct hfi1_pportdata, sl2sc_kobj);
	struct hfi1_ibport *ibp = &ppd->ibport_data;

	return sprintf(buf, "%u\n", ibp->sl_to_sc[sattr->sl]);
}

static const struct sysfs_ops hfi1_sl2sc_ops = {
	.show = sl2sc_attr_show,
};

static struct kobj_type hfi1_sl2sc_ktype = {
	.release = port_release,
	.sysfs_ops = &hfi1_sl2sc_ops,
	.default_attrs = sl2sc_default_attributes
};

/* End sl2sc */

/* Start vl2mtu */

#define HFI1_VL2MTU_ATTR(N) \
	static struct hfi1_vl2mtu_attr hfi1_vl2mtu_attr_##N = { \
		.attr = { .name = __stringify(N), .mode = 0444 }, \
		.vl = N						  \
	}

struct hfi1_vl2mtu_attr {
	struct attribute attr;
	int vl;
};

HFI1_VL2MTU_ATTR(0);
HFI1_VL2MTU_ATTR(1);
HFI1_VL2MTU_ATTR(2);
HFI1_VL2MTU_ATTR(3);
HFI1_VL2MTU_ATTR(4);
HFI1_VL2MTU_ATTR(5);
HFI1_VL2MTU_ATTR(6);
HFI1_VL2MTU_ATTR(7);
HFI1_VL2MTU_ATTR(8);
HFI1_VL2MTU_ATTR(9);
HFI1_VL2MTU_ATTR(10);
HFI1_VL2MTU_ATTR(11);
HFI1_VL2MTU_ATTR(12);
HFI1_VL2MTU_ATTR(13);
HFI1_VL2MTU_ATTR(14);
HFI1_VL2MTU_ATTR(15);

static struct attribute *vl2mtu_default_attributes[] = {
	&hfi1_vl2mtu_attr_0.attr,
	&hfi1_vl2mtu_attr_1.attr,
	&hfi1_vl2mtu_attr_2.attr,
	&hfi1_vl2mtu_attr_3.attr,
	&hfi1_vl2mtu_attr_4.attr,
	&hfi1_vl2mtu_attr_5.attr,
	&hfi1_vl2mtu_attr_6.attr,
	&hfi1_vl2mtu_attr_7.attr,
	&hfi1_vl2mtu_attr_8.attr,
	&hfi1_vl2mtu_attr_9.attr,
	&hfi1_vl2mtu_attr_10.attr,
	&hfi1_vl2mtu_attr_11.attr,
	&hfi1_vl2mtu_attr_12.attr,
	&hfi1_vl2mtu_attr_13.attr,
	&hfi1_vl2mtu_attr_14.attr,
	&hfi1_vl2mtu_attr_15.attr,
	NULL
};

static ssize_t vl2mtu_attr_show(struct kobject *kobj, struct attribute *attr,
				char *buf)
{
	struct hfi1_vl2mtu_attr *vlattr =
		container_of(attr, struct hfi1_vl2mtu_attr, attr);
	struct hfi1_pportdata *ppd =
		container_of(kobj, struct hfi1_pportdata, vl2mtu_kobj);
	struct hfi1_devdata *dd = ppd->dd;

	return sprintf(buf, "%u\n", dd->vld[vlattr->vl].mtu);
}

static const struct sysfs_ops hfi1_vl2mtu_ops = {
	.show = vl2mtu_attr_show,
};

static struct kobj_type hfi1_vl2mtu_ktype = {
	.release = port_release,
	.sysfs_ops = &hfi1_vl2mtu_ops,
	.default_attrs = vl2mtu_default_attributes
};

/* end of per-port file structures and support code */

/*
 * Start of per-unit (or driver, in some cases, but replicated
 * per unit) functions (these get a device *)
 */
static ssize_t show_rev(struct device *device, struct device_attribute *attr,
			char *buf)
{
	struct hfi1_ibdev *dev =
		container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);

	return sprintf(buf, "%x\n", dd_from_dev(dev)->minrev);
}

static ssize_t show_hfi(struct device *device, struct device_attribute *attr,
			char *buf)
{
	struct hfi1_ibdev *dev =
		container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
	struct hfi1_devdata *dd = dd_from_dev(dev);
	int ret;

	if (!dd->boardname)
		ret = -EINVAL;
	else
		ret = scnprintf(buf, PAGE_SIZE, "%s\n", dd->boardname);
	return ret;
}

static ssize_t show_boardversion(struct device *device,
				 struct device_attribute *attr, char *buf)
{
	struct hfi1_ibdev *dev =
		container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
	struct hfi1_devdata *dd = dd_from_dev(dev);

	/* The string printed here is already newline-terminated. */
	return scnprintf(buf, PAGE_SIZE, "%s", dd->boardversion);
}

static ssize_t show_nctxts(struct device *device,
			   struct device_attribute *attr, char *buf)
{
	struct hfi1_ibdev *dev =
		container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
	struct hfi1_devdata *dd = dd_from_dev(dev);

	/*
	 * Return the smaller of send and receive contexts.
	 * Normally, user level applications would require both a send
	 * and a receive context, so returning the smaller of the two counts
	 * give a more accurate picture of total contexts available.
	 */
	return scnprintf(buf, PAGE_SIZE, "%u\n",
			 min(dd->num_rcv_contexts - dd->first_dyn_alloc_ctxt,
			     (u32)dd->sc_sizes[SC_USER].count));
}

static ssize_t show_nfreectxts(struct device *device,
			       struct device_attribute *attr, char *buf)
{
	struct hfi1_ibdev *dev =
		container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
	struct hfi1_devdata *dd = dd_from_dev(dev);

	/* Return the number of free user ports (contexts) available. */
	return scnprintf(buf, PAGE_SIZE, "%u\n", dd->freectxts);
}

static ssize_t show_serial(struct device *device,
			   struct device_attribute *attr, char *buf)
{
	struct hfi1_ibdev *dev =
		container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
	struct hfi1_devdata *dd = dd_from_dev(dev);

	return scnprintf(buf, PAGE_SIZE, "%s", dd->serial);
}

static ssize_t store_chip_reset(struct device *device,
				struct device_attribute *attr, const char *buf,
				size_t count)
{
	struct hfi1_ibdev *dev =
		container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
	struct hfi1_devdata *dd = dd_from_dev(dev);
	int ret;

	if (count < 5 || memcmp(buf, "reset", 5) || !dd->diag_client) {
		ret = -EINVAL;
		goto bail;
	}

	ret = hfi1_reset_device(dd->unit);
bail:
	return ret < 0 ? ret : count;
}

/*
 * Convert the reported temperature from an integer (reported in
 * units of 0.25C) to a floating point number.
 */
#define temp2str(temp, buf, size, idx)					\
	scnprintf((buf) + (idx), (size) - (idx), "%u.%02u ",		\
			      ((temp) >> 2), ((temp) & 0x3) * 25)

/*
 * Dump tempsense values, in decimal, to ease shell-scripts.
 */
static ssize_t show_tempsense(struct device *device,
			      struct device_attribute *attr, char *buf)
{
	struct hfi1_ibdev *dev =
		container_of(device, struct hfi1_ibdev, rdi.ibdev.dev);
	struct hfi1_devdata *dd = dd_from_dev(dev);
	struct hfi1_temp temp;
	int ret;

	ret = hfi1_tempsense_rd(dd, &temp);
	if (!ret) {
		int idx = 0;

		idx += temp2str(temp.curr, buf, PAGE_SIZE, idx);
		idx += temp2str(temp.lo_lim, buf, PAGE_SIZE, idx);
		idx += temp2str(temp.hi_lim, buf, PAGE_SIZE, idx);
		idx += temp2str(temp.crit_lim, buf, PAGE_SIZE, idx);
		idx += scnprintf(buf + idx, PAGE_SIZE - idx,
				"%u %u %u\n", temp.triggers & 0x1,
				temp.triggers & 0x2, temp.triggers & 0x4);
		ret = idx;
	}
	return ret;
}

/*
 * end of per-unit (or driver, in some cases, but replicated
 * per unit) functions
 */

/* start of per-unit file structures and support code */
static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
static DEVICE_ATTR(board_id, S_IRUGO, show_hfi, NULL);
static DEVICE_ATTR(nctxts, S_IRUGO, show_nctxts, NULL);
static DEVICE_ATTR(nfreectxts, S_IRUGO, show_nfreectxts, NULL);
static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL);
static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
static DEVICE_ATTR(tempsense, S_IRUGO, show_tempsense, NULL);
static DEVICE_ATTR(chip_reset, S_IWUSR, NULL, store_chip_reset);

static struct device_attribute *hfi1_attributes[] = {
	&dev_attr_hw_rev,
	&dev_attr_board_id,
	&dev_attr_nctxts,
	&dev_attr_nfreectxts,
	&dev_attr_serial,
	&dev_attr_boardversion,
	&dev_attr_tempsense,
	&dev_attr_chip_reset,
};

int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
			   struct kobject *kobj)
{
	struct hfi1_pportdata *ppd;
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	int ret;

	if (!port_num || port_num > dd->num_pports) {
		dd_dev_err(dd,
			   "Skipping infiniband class with invalid port %u\n",
			   port_num);
		return -ENODEV;
	}
	ppd = &dd->pport[port_num - 1];

	ret = kobject_init_and_add(&ppd->sc2vl_kobj, &hfi1_sc2vl_ktype, kobj,
				   "sc2vl");
	if (ret) {
		dd_dev_err(dd,
			   "Skipping sc2vl sysfs info, (err %d) port %u\n",
			   ret, port_num);
		goto bail;
	}
	kobject_uevent(&ppd->sc2vl_kobj, KOBJ_ADD);

	ret = kobject_init_and_add(&ppd->sl2sc_kobj, &hfi1_sl2sc_ktype, kobj,
				   "sl2sc");
	if (ret) {
		dd_dev_err(dd,
			   "Skipping sl2sc sysfs info, (err %d) port %u\n",
			   ret, port_num);
		goto bail_sc2vl;
	}
	kobject_uevent(&ppd->sl2sc_kobj, KOBJ_ADD);

	ret = kobject_init_and_add(&ppd->vl2mtu_kobj, &hfi1_vl2mtu_ktype, kobj,
				   "vl2mtu");
	if (ret) {
		dd_dev_err(dd,
			   "Skipping vl2mtu sysfs info, (err %d) port %u\n",
			   ret, port_num);
		goto bail_sl2sc;
	}
	kobject_uevent(&ppd->vl2mtu_kobj, KOBJ_ADD);

	ret = kobject_init_and_add(&ppd->pport_cc_kobj, &port_cc_ktype,
				   kobj, "CCMgtA");
	if (ret) {
		dd_dev_err(dd,
			   "Skipping Congestion Control sysfs info, (err %d) port %u\n",
			   ret, port_num);
		goto bail_vl2mtu;
	}

	kobject_uevent(&ppd->pport_cc_kobj, KOBJ_ADD);

	ret = sysfs_create_bin_file(&ppd->pport_cc_kobj, &cc_setting_bin_attr);
	if (ret) {
		dd_dev_err(dd,
			   "Skipping Congestion Control setting sysfs info, (err %d) port %u\n",
			   ret, port_num);
		goto bail_cc;
	}

	ret = sysfs_create_bin_file(&ppd->pport_cc_kobj, &cc_table_bin_attr);
	if (ret) {
		dd_dev_err(dd,
			   "Skipping Congestion Control table sysfs info, (err %d) port %u\n",
			   ret, port_num);
		goto bail_cc_entry_bin;
	}

	dd_dev_info(dd,
		    "Congestion Control Agent enabled for port %d\n",
		    port_num);

	return 0;

bail_cc_entry_bin:
	sysfs_remove_bin_file(&ppd->pport_cc_kobj,
			      &cc_setting_bin_attr);
bail_cc:
	kobject_put(&ppd->pport_cc_kobj);
bail_vl2mtu:
	kobject_put(&ppd->vl2mtu_kobj);
bail_sl2sc:
	kobject_put(&ppd->sl2sc_kobj);
bail_sc2vl:
	kobject_put(&ppd->sc2vl_kobj);
bail:
	return ret;
}

struct sde_attribute {
	struct attribute attr;
	ssize_t (*show)(struct sdma_engine *sde, char *buf);
	ssize_t (*store)(struct sdma_engine *sde, const char *buf, size_t cnt);
};

static ssize_t sde_show(struct kobject *kobj, struct attribute *attr, char *buf)
{
	struct sde_attribute *sde_attr =
		container_of(attr, struct sde_attribute, attr);
	struct sdma_engine *sde =
		container_of(kobj, struct sdma_engine, kobj);

	if (!sde_attr->show)
		return -EINVAL;

	return sde_attr->show(sde, buf);
}

static ssize_t sde_store(struct kobject *kobj, struct attribute *attr,
			 const char *buf, size_t count)
{
	struct sde_attribute *sde_attr =
		container_of(attr, struct sde_attribute, attr);
	struct sdma_engine *sde =
		container_of(kobj, struct sdma_engine, kobj);

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;

	if (!sde_attr->store)
		return -EINVAL;

	return sde_attr->store(sde, buf, count);
}

static const struct sysfs_ops sde_sysfs_ops = {
	.show = sde_show,
	.store = sde_store,
};

static struct kobj_type sde_ktype = {
	.sysfs_ops = &sde_sysfs_ops,
};

#define SDE_ATTR(_name, _mode, _show, _store) \
	struct sde_attribute sde_attr_##_name = \
		__ATTR(_name, _mode, _show, _store)

static ssize_t sde_show_cpu_to_sde_map(struct sdma_engine *sde, char *buf)
{
	return sdma_get_cpu_to_sde_map(sde, buf);
}

static ssize_t sde_store_cpu_to_sde_map(struct sdma_engine *sde,
					const char *buf, size_t count)
{
	return sdma_set_cpu_to_sde_map(sde, buf, count);
}

static ssize_t sde_show_vl(struct sdma_engine *sde, char *buf)
{
	int vl;

	vl = sdma_engine_get_vl(sde);
	if (vl < 0)
		return vl;

	return snprintf(buf, PAGE_SIZE, "%d\n", vl);
}

static SDE_ATTR(cpu_list, S_IWUSR | S_IRUGO,
		sde_show_cpu_to_sde_map,
		sde_store_cpu_to_sde_map);
static SDE_ATTR(vl, S_IRUGO, sde_show_vl, NULL);

static struct sde_attribute *sde_attribs[] = {
	&sde_attr_cpu_list,
	&sde_attr_vl
};

/*
 * Register and create our files in /sys/class/infiniband.
 */
int hfi1_verbs_register_sysfs(struct hfi1_devdata *dd)
{
	struct ib_device *dev = &dd->verbs_dev.rdi.ibdev;
	struct device *class_dev = &dev->dev;
	int i, j, ret;

	for (i = 0; i < ARRAY_SIZE(hfi1_attributes); ++i) {
		ret = device_create_file(&dev->dev, hfi1_attributes[i]);
		if (ret)
			goto bail;
	}

	for (i = 0; i < dd->num_sdma; i++) {
		ret = kobject_init_and_add(&dd->per_sdma[i].kobj,
					   &sde_ktype, &class_dev->kobj,
					   "sdma%d", i);
		if (ret)
			goto bail;

		for (j = 0; j < ARRAY_SIZE(sde_attribs); j++) {
			ret = sysfs_create_file(&dd->per_sdma[i].kobj,
						&sde_attribs[j]->attr);
			if (ret)
				goto bail;
		}
	}

	return 0;
bail:
	for (i = 0; i < ARRAY_SIZE(hfi1_attributes); ++i)
		device_remove_file(&dev->dev, hfi1_attributes[i]);

	for (i = 0; i < dd->num_sdma; i++)
		kobject_del(&dd->per_sdma[i].kobj);

	return ret;
}

/*
 * Unregister and remove our files in /sys/class/infiniband.
 */
void hfi1_verbs_unregister_sysfs(struct hfi1_devdata *dd)
{
	struct hfi1_pportdata *ppd;
	int i;

	for (i = 0; i < dd->num_pports; i++) {
		ppd = &dd->pport[i];

		sysfs_remove_bin_file(&ppd->pport_cc_kobj,
				      &cc_setting_bin_attr);
		sysfs_remove_bin_file(&ppd->pport_cc_kobj,
				      &cc_table_bin_attr);
		kobject_put(&ppd->pport_cc_kobj);
		kobject_put(&ppd->vl2mtu_kobj);
		kobject_put(&ppd->sl2sc_kobj);
		kobject_put(&ppd->sc2vl_kobj);
	}
}