-
Notifications
You must be signed in to change notification settings - Fork 398
/
qdma_debugfs_queue.c
1190 lines (1052 loc) · 34.3 KB
/
qdma_debugfs_queue.c
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
/*
* This file is part of the Xilinx DMA IP Core driver for Linux
*
* Copyright (c) 2017-present, Xilinx, Inc.
* All rights reserved.
*
* This source code is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, 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.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*/
#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
#include "qdma_debugfs_queue.h"
#include "libqdma_export.h"
#include "qdma_regs.h"
#include "qdma_context.h"
#include "qdma_descq.h"
#include "qdma_regs.h"
#include <linux/uaccess.h>
#ifdef DEBUGFS
#define DEBUGFS_QUEUE_DESC_SZ (100)
#define DEBUGFS_QUEUE_INFO_SZ (256)
#define DEBUGFS_QUEUE_CTXT_SZ (2 * 4096)
#define DEBUGFS_CTXT_ELEM(reg, pos, size) \
((reg >> pos) & ~(~0 << size))
#define DBGFS_QUEUE_INFO_SZ 256
#define DBGFS_ERR_BUFLEN (64)
enum dbgfs_queue_info_type {
DBGFS_QINFO_INFO = 0,
DBGFS_QINFO_CNTXT = 1,
DBGFS_QINFO_DESC = 2,
DBGFS_QINFO_END,
};
enum dbgfs_cntxt_word {
DBGFS_CNTXT_W0 = 0,
DBGFS_CNTXT_W1 = 1,
DBGFS_CNTXT_W2 = 2,
DBGFS_CNTXT_W3 = 3,
DBGFS_CNTXT_W4 = 4,
DBGFS_CNTXT_W5 = 5,
DBGFS_CNTXT_W6 = 6,
DBGFS_CNTXT_W7 = 7,
};
enum dbgfs_cmpt_queue_info_type {
DBGFS_CMPT_QINFO_INFO = 0,
DBGFS_CMPT_QINFO_CNTXT = 1,
DBGFS_CMPT_QINFO_DESC = 2,
DBGFS_CMPT_QINFO_END,
};
struct dbgfs_q_dbgf {
char name[DBGFS_DBG_FNAME_SZ];
struct file_operations fops;
};
struct dbgfs_q_priv {
unsigned long dev_hndl;
unsigned long qhndl;
char *data;
int datalen;
};
struct dbgfs_qctxt_entry {
char name[DBGFS_CTXT_ENTRY_NAME_SZ];
unsigned short word;
u32 pos;
u32 len;
};
enum dbgfs_desc_type {
DBGFS_DESC_TYPE_C2H = 0,
DBGFS_DESC_TYPE_H2C = DBGFS_DESC_TYPE_C2H,
DBGFS_DESC_TYPE_CMPT = 1,
DBGFS_DESC_TYPE_END = 2,
};
static struct dbgfs_qctxt_entry app_ctxt[] = {
/** format:
*{<name>, <word>, <start_bit_index>, <len>}
*/
{"PIDX", DBGFS_CNTXT_W0, S_DESC_CTXT_W0_PIDX,
L_DESC_CTXT_W0_PIDX},
{"IRQ Arm", DBGFS_CNTXT_W0, S_DESC_CTXT_W0_F_INTR_ARM, 1},
{"Function Id", DBGFS_CNTXT_W0, S_DESC_CTXT_W0_FUNC_ID,
L_DESC_CTXT_W0_FUNC_ID},
{"Queue Enable", DBGFS_CNTXT_W1, S_DESC_CTXT_W1_F_QEN, 1},
{"Fetch Credit Enable", DBGFS_CNTXT_W1,
S_DESC_CTXT_W1_F_FCRD_EN, 1},
{"Write back/Intr Check", DBGFS_CNTXT_W1,
S_DESC_CTXT_W1_F_CMPL_STATUS_PEND_CHK, 1},
{"Write back Acc Enable", DBGFS_CNTXT_W1,
S_DESC_CTXT_W1_F_CMPL_STATUS_ACC_EN, 1},
{"Address Translation", DBGFS_CNTXT_W1,
S_DESC_CTXT_W1_F_AT, 1},
{"Fetch Max", DBGFS_CNTXT_W1,
S_DESC_CTXT_W1_FETCH_MAX, L_DESC_CTXT_W1_FETCH_MAX},
{"Ring Size", DBGFS_CNTXT_W1, S_DESC_CTXT_W1_RNG_SZ,
L_DESC_CTXT_W1_RNG_SZ},
{"Descriptor Size", DBGFS_CNTXT_W1, S_DESC_CTXT_W1_DSC_SZ,
L_DESC_CTXT_W1_DSC_SZ},
{"Bypass Enable", DBGFS_CNTXT_W1, S_DESC_CTXT_W1_F_BYP, 1},
{"MM Channel", DBGFS_CNTXT_W1, S_DESC_CTXT_W1_F_MM_CHN, 1},
{"Writeback Enable", DBGFS_CNTXT_W1,
S_DESC_CTXT_W1_F_CMPL_STATUS_EN, 1},
{"Interrupt Enable", DBGFS_CNTXT_W1,
S_DESC_CTXT_W1_F_IRQ_EN, 1},
{"Port Id", DBGFS_CNTXT_W1, S_DESC_CTXT_W1_PORT_ID,
L_DESC_CTXT_W1_PORT_ID},
{"Interrupt No Last", DBGFS_CNTXT_W1,
S_DESC_CTXT_W1_F_IRQ_NO_LAST, 1},
{"Error", DBGFS_CNTXT_W1, S_DESC_CTXT_W1_ERR,
L_DESC_CTXT_W1_ERR},
{"Writeback Error Sent", DBGFS_CNTXT_W1,
S_DESC_CTXT_W1_F_CMPL_STATUS_ERR_SNT, 1},
{"IRQ Request", DBGFS_CNTXT_W1, S_DESC_CTXT_W1_F_IRQ_REQ, 1},
{"Marker Disable", DBGFS_CNTXT_W1,
S_DESC_CTXT_W1_F_MRKR_DIS, 1},
{"Is Memory Mapped", DBGFS_CNTXT_W1,
S_DESC_CTXT_W1_F_IS_MM, 1},
{"Interrupt Aggregation", DBGFS_CNTXT_W4,
S_DESC_CTXT_W1_F_INTR_AGGR, 1},
{"Descriptor Ring Base Addr (Low)", DBGFS_CNTXT_W2, 0, 32},
{"Descriptor Ring Base Addr (High)", DBGFS_CNTXT_W3, 0, 32},
};
static struct dbgfs_qctxt_entry hw_ctxt[] = {
{"CIDX", DBGFS_CNTXT_W0, 0, 16},
{"Credits Consumed", DBGFS_CNTXT_W0, 16, 16},
{"Descriptors Pending", DBGFS_CNTXT_W1, 8, 1},
{"Queue Invalid No Desc Pending", DBGFS_CNTXT_W1, 9, 1},
{"Eviction Pending", DBGFS_CNTXT_W1, 10, 1},
{"Fetch Peding", DBGFS_CNTXT_W1, 10, 1},
};
static struct dbgfs_qctxt_entry credit_ctxt[] = {
{"Credit", DBGFS_CNTXT_W0, 0, 16},
};
static struct dbgfs_qctxt_entry cmpt_ctxt[] = {
{"Enable Status Desc Update", DBGFS_CNTXT_W0,
S_CMPT_CTXT_W0_F_EN_STAT_DESC, 1},
{"Enable Interrupt", DBGFS_CNTXT_W0, S_CMPT_CTXT_W0_F_EN_INT, 1},
{"Trigger Mode", DBGFS_CNTXT_W0, S_CMPT_CTXT_W0_TRIG_MODE,
L_CMPT_CTXT_W0_TRIG_MODE},
{"Function Id", DBGFS_CNTXT_W0, S_CMPT_CTXT_W0_FNC_ID,
L_CMPT_CTXT_W0_FNC_ID},
{"Counter Index", DBGFS_CNTXT_W0, S_CMPT_CTXT_W0_COUNTER_IDX,
L_CMPT_CTXT_W0_COUNTER_IDX},
{"Timer Index", DBGFS_CNTXT_W0, S_CMPT_CTXT_W0_TIMER_IDX,
L_CMPT_CTXT_W0_TIMER_IDX},
{"Interrupt State", DBGFS_CNTXT_W0, S_CMPT_CTXT_W0_INT_ST,
L_CMPT_CTXT_W0_INT_ST},
{"Color", DBGFS_CNTXT_W0, S_CMPT_CTXT_W0_F_COLOR, 1},
{"Ring Size", DBGFS_CNTXT_W0, S_CMPT_CTXT_W0_RNG_SZ,
L_CMPT_CTXT_W0_RNG_SZ},
{"Base Address (Low)", DBGFS_CNTXT_W1, 0, 32},
{"Base Address (High)", DBGFS_CNTXT_W2, S_CMPT_CTXT_W2_BADDR_64,
L_CMPT_CTXT_W2_BADDR_64},
{"Descriptor Size", DBGFS_CNTXT_W2, S_CMPT_CTXT_W2_DESC_SIZE,
L_CMPT_CTXT_W2_DESC_SIZE},
{"PIDX (Low)", DBGFS_CNTXT_W2, S_CMPT_CTXT_W2_PIDX_L,
L_CMPT_CTXT_W3_PIDX_H},
{"PIDX (High)", DBGFS_CNTXT_W3, S_CMPT_CTXT_W3_PIDX_H,
L_CMPT_CTXT_W3_PIDX_H},
{"CIDX", DBGFS_CNTXT_W3, S_CMPT_CTXT_W3_CIDX, L_CMPT_CTXT_W3_CIDX},
{"Valid", DBGFS_CNTXT_W3, S_CMPT_CTXT_W3_F_VALID, 1},
{"ERROR", DBGFS_CNTXT_W3, S_CMPT_CTXT_W3_ERR, L_CMPT_CTXT_W3_ERR},
{"Trigger Pending", DBGFS_CNTXT_W3, S_CMPT_CTXT_W3_F_TRIG_PEND, 1},
{"Timer Running", DBGFS_CNTXT_W4, S_CMPT_CTXT_W4_F_TMR_RUNNING, 1},
{"Full Update", DBGFS_CNTXT_W4, S_CMPT_CTXT_W4_F_FULL_UPDATE, 1},
{"Over Flow Check Disable", DBGFS_CNTXT_W4,
S_CMPT_CTXT_W4_F_OVF_CHK_DIS, 1},
{"Address Translation", DBGFS_CNTXT_W4, S_CMPT_CTXT_W4_F_AT, 1},
};
/**TBD: enable them when RTL2 is stable */
static struct dbgfs_qctxt_entry c2h_pftch_ctxt[] = {
{"Bypass", DBGFS_CNTXT_W0, S_PFTCH_W0_F_BYPASS, 1},
{"Buffer Size Index", DBGFS_CNTXT_W0, S_PFTCH_W0_BUF_SIZE_IDX,
L_PFTCH_W0_BUF_SIZE_IDX},
{"Port Id", DBGFS_CNTXT_W0, S_PFTCH_W0_PORT_ID, L_PFTCH_W0_PORT_ID},
{"Error", DBGFS_CNTXT_W0, S_PFTCH_W0_F_ERR, 1},
{"Prefetch Enable", DBGFS_CNTXT_W0, S_PFTCH_W0_F_EN_PFTCH, 1},
{"In Prefetch", DBGFS_CNTXT_W0, S_PFTCH_W0_F_Q_IN_PFTCH, 1},
{"Software Credit (Low)", DBGFS_CNTXT_W0, S_PFTCH_W0_SW_CRDT_L,
L_PFTCH_W0_SW_CRDT_L},
{"Software Credit (High)", DBGFS_CNTXT_W1, S_PFTCH_W1_SW_CRDT_H,
L_PFTCH_W1_SW_CRDT_H},
{"Valid", DBGFS_CNTXT_W1, S_PFTCH_W1_F_VALID, 1},
};
/** structure to hold file ops */
static struct dbgfs_q_dbgf qf[DBGFS_QINFO_END];
/** structure to hold file ops */
static struct dbgfs_q_dbgf cmpt_qf[DBGFS_CMPT_QINFO_END];
int q_dbg_file_open(struct inode *inode, struct file *fp);
int q_dbg_file_release(struct inode *inode, struct file *fp);
int qdbg_info_read(unsigned long dev_hndl, unsigned long id, char **data,
int *data_len, enum dbgfs_desc_type type);
int qdbg_desc_read(unsigned long dev_hndl, unsigned long id, char **data,
int *data_len, enum dbgfs_desc_type type);
int qdbg_cntxt_read(unsigned long dev_hndl, unsigned long id, char **data,
int *data_len, enum dbgfs_desc_type type);
/*****************************************************************************/
/**
* cmpt_q_dbg_file_open() - static function that provides generic open
*
* @param[in] inode: pointer to file inode
* @param[in] fp: pointer to file structure
*
* @return 0: success
* @return <0: error
*****************************************************************************/
static int cmpt_q_dbg_file_open(struct inode *inode, struct file *fp)
{
return q_dbg_file_open(inode, fp);
}
/*****************************************************************************/
/**
* cmpt_q_dbg_file_release() - static function that provides generic release
*
* @param[in] inode: pointer to file inode
* @param[in] fp: pointer to file structure
*
* @return 0: success
* @return <0: error
*****************************************************************************/
static int cmpt_q_dbg_file_release(struct inode *inode, struct file *fp)
{
return q_dbg_file_release(inode, fp);
}
/*****************************************************************************/
/**
* cmpt_q_dbg_file_read() - static function that provides common read
*
* @param[in] fp: pointer to file structure
* @param[out] user_buffer: pointer to user buffer
* @param[in] count: size of data to read
* @param[in/out] ppos: pointer to offset read
* @param[in] type: information type
*
* @return >0: size read
* @return <0: error
*****************************************************************************/
static ssize_t cmpt_q_dbg_file_read(struct file *fp,
char __user *user_buffer,
size_t count, loff_t *ppos,
enum dbgfs_queue_info_type type)
{
char *buf = NULL;
int buf_len = 0;
int len = 0;
int rv = 0;
struct dbgfs_q_priv *qpriv =
(struct dbgfs_q_priv *)fp->private_data;
if (qpriv->data == NULL && qpriv->datalen == 0) {
if (type == DBGFS_QINFO_INFO) {
rv = qdbg_info_read(qpriv->dev_hndl, qpriv->qhndl,
&buf, &buf_len, DBGFS_DESC_TYPE_CMPT);
} else if (type == DBGFS_QINFO_CNTXT) {
rv = qdbg_cntxt_read(qpriv->dev_hndl, qpriv->qhndl,
&buf, &buf_len, DBGFS_DESC_TYPE_CMPT);
} else if (type == DBGFS_QINFO_DESC) {
rv = qdbg_desc_read(qpriv->dev_hndl, qpriv->qhndl,
&buf, &buf_len, DBGFS_DESC_TYPE_CMPT);
}
if (rv < 0)
goto cmpt_q_dbg_file_read_exit;
qpriv->datalen = rv;
qpriv->data = buf;
}
buf = qpriv->data;
len = qpriv->datalen;
if (!buf)
goto cmpt_q_dbg_file_read_exit;
/** write to user buffer */
if (*ppos >= len) {
rv = 0;
goto cmpt_q_dbg_file_read_exit;
}
if (*ppos + count > len)
count = len - *ppos;
if (copy_to_user(user_buffer, buf + *ppos, count)) {
rv = -EFAULT;
goto cmpt_q_dbg_file_read_exit;
}
*ppos += count;
pr_debug("cmpt q read size %zu\n", count);
return count;
cmpt_q_dbg_file_read_exit:
kfree(buf);
qpriv->data = NULL;
qpriv->datalen = 0;
return rv;
}
/*****************************************************************************/
/**
* cmpt_q_info_open() - static function that executes info open
*
* @param[in] inode: pointer to file inode
* @param[in] fp: pointer to file structure
*
* @return 0: success
* @return <0: error
*****************************************************************************/
static int cmpt_q_info_open(struct inode *inode, struct file *fp)
{
return cmpt_q_dbg_file_open(inode, fp);
}
/*****************************************************************************/
/**
* cmpt_q_info_read() - static function that executes info read
*
* @param[in] fp: pointer to file structure
* @param[out] user_buffer: pointer to user buffer
* @param[in] count: size of data to read
* @param[in/out] ppos: pointer to offset read
*
* @return >0: size read
* @return <0: error
*****************************************************************************/
static ssize_t cmpt_q_info_read(struct file *fp, char __user *user_buffer,
size_t count, loff_t *ppos)
{
return cmpt_q_dbg_file_read(fp, user_buffer, count, ppos,
DBGFS_QINFO_INFO);
}
/*****************************************************************************/
/**
* cmpt_q_cntxt_open() - static function that executes info open
*
* @param[in] inode: pointer to file inode
* @param[in] fp: pointer to file structure
*
* @return 0: success
* @return <0: error
*****************************************************************************/
static int cmpt_q_cntxt_open(struct inode *inode, struct file *fp)
{
return cmpt_q_dbg_file_open(inode, fp);
}
/*****************************************************************************/
/**
* cmpt_q_cntxt_read() - static function that executes info read
*
* @param[in] fp: pointer to file structure
* @param[out] user_buffer: pointer to user buffer
* @param[in] count: size of data to read
* @param[in/out] ppos: pointer to offset read
*
* @return >0: size read
* @return <0: error
*****************************************************************************/
static ssize_t cmpt_q_cntxt_read(struct file *fp, char __user *user_buffer,
size_t count, loff_t *ppos)
{
return cmpt_q_dbg_file_read(fp, user_buffer, count, ppos,
DBGFS_QINFO_CNTXT);
}
/*****************************************************************************/
/**
* cmpt_q_desc_open() - static function that executes descriptor open
*
* @param[in] inode: pointer to file inode
* @param[in] fp: pointer to file structure
*
* @return 0: success
* @return <0: error
*****************************************************************************/
static int cmpt_q_desc_open(struct inode *inode, struct file *fp)
{
return cmpt_q_dbg_file_open(inode, fp);
}
/*****************************************************************************/
/**
* cmpt_q_desc_read() - static function that executes descriptor read
*
* @param[in] fp: pointer to file structure
* @param[out] user_buffer: pointer to user buffer
* @param[in] count: size of data to read
* @param[in/out] ppos: pointer to offset read
*
* @return >0: size read
* @return <0: error
*****************************************************************************/
static ssize_t cmpt_q_desc_read(struct file *fp, char __user *user_buffer,
size_t count, loff_t *ppos)
{
return cmpt_q_dbg_file_read(fp, user_buffer, count, ppos,
DBGFS_QINFO_DESC);
}
/*****************************************************************************/
/**
* create_cmpt_q_dbg_files() - static function to create cmpt queue dbg files
*
* @param[in] queue_root: debugfs root for a queue
*
* @return >0: size read
* @return <0: error
*****************************************************************************/
int create_cmpt_q_dbg_files(struct qdma_descq *descq, struct dentry *queue_root)
{
struct dentry *fp[DBGFS_QINFO_END] = { NULL };
struct file_operations *fops = NULL;
int i = 0;
memset(cmpt_qf, 0, sizeof(struct dbgfs_q_dbgf) * DBGFS_CMPT_QINFO_END);
for (i = 0; i < DBGFS_CMPT_QINFO_END; i++) {
fops = &cmpt_qf[i].fops;
fops->owner = THIS_MODULE;
switch (i) {
case DBGFS_CMPT_QINFO_INFO:
snprintf(cmpt_qf[i].name, DBGFS_DBG_FNAME_SZ,
"%s", "info");
fops->open = cmpt_q_info_open;
fops->read = cmpt_q_info_read;
fops->release = cmpt_q_dbg_file_release;
break;
case DBGFS_CMPT_QINFO_CNTXT:
snprintf(cmpt_qf[i].name, DBGFS_DBG_FNAME_SZ,
"%s", "cntxt");
fops->open = cmpt_q_cntxt_open;
fops->read = cmpt_q_cntxt_read;
fops->release = cmpt_q_dbg_file_release;
break;
case DBGFS_CMPT_QINFO_DESC:
snprintf(cmpt_qf[i].name, DBGFS_DBG_FNAME_SZ,
"%s", "desc");
fops->open = cmpt_q_desc_open;
fops->read = cmpt_q_desc_read;
fops->release = cmpt_q_dbg_file_release;
break;
}
}
for (i = 0; i < DBGFS_CMPT_QINFO_END; i++) {
fp[i] = debugfs_create_file(cmpt_qf[i].name, 0644, queue_root,
descq, &cmpt_qf[i].fops);
if (!fp[i])
return -1;
}
return 0;
}
/*****************************************************************************/
/**
* q_dbg_file_open() - generic queue debug file open
*
* @param[in] inode: pointer to file inode
* @param[in] fp: pointer to file structure
*
* @return 0: success
* @return <0: error
*****************************************************************************/
int q_dbg_file_open(struct inode *inode, struct file *fp)
{
int dev_id = -1;
int qidx = -1;
struct dbgfs_q_priv *priv = NULL;
int rv = 0;
int c2h = 0;
unsigned char dev_name[QDMA_DEV_NAME_SZ] = {0};
unsigned char *lptr = NULL, *rptr = NULL;
struct dentry *direction_dir = NULL;
struct dentry *qid_dir = NULL;
struct dentry *qroot_dir = NULL;
struct dentry *dev_dir = NULL;
struct qdma_descq *descq = NULL;
if (!inode || !fp)
return -EINVAL;
descq = inode->i_private;
if (!descq)
return -EINVAL;
direction_dir = fp->f_path.dentry->d_parent;
qid_dir = direction_dir->d_parent;
qroot_dir = qid_dir->d_parent;
dev_dir = qroot_dir->d_parent;
/* check the direction */
if (!strncmp((const char *)direction_dir->d_iname,
"c2h", strlen("c2h")) ||
!strncmp((const char *)direction_dir->d_iname,
"cmpt", strlen("cmpt")))
c2h = 1;
/* convert this string as integer */
rv = kstrtoint((const char *)qid_dir->d_iname, 0, &qidx);
if (rv < 0) {
rv = -ENODEV;
return rv;
}
/* convert colon sepearted b:d:f to hex */
rptr = dev_dir->d_iname;
lptr = dev_name;
while (*rptr) {
if (*rptr == ':') {
rptr++;
continue;
}
*lptr++ = *rptr++;
}
/* convert this string as hex integer */
rv = kstrtoint((const char *)dev_name, 16, &dev_id);
if (rv < 0) {
rv = -ENODEV;
return rv;
}
priv = (struct dbgfs_q_priv *) kzalloc(sizeof(struct dbgfs_q_priv),
GFP_KERNEL);
if (!priv) {
rv = -ENOMEM;
return rv;
}
priv->dev_hndl = (unsigned long)descq->xdev;
priv->qhndl = qdma_device_get_id_from_descq(descq->xdev, descq);
if (priv->qhndl < 0) {
kfree(priv);
return -EINVAL;
}
fp->private_data = priv;
return 0;
}
/*****************************************************************************/
/**
* q_dbg_file_release() - function that provides generic release
*
* @param[in] inode: pointer to file inode
* @param[in] fp: pointer to file structure
*
* @return 0: success
* @return <0: error
*****************************************************************************/
int q_dbg_file_release(struct inode *inode, struct file *fp)
{
kfree(fp->private_data);
fp->private_data = NULL;
return 0;
}
/*****************************************************************************/
/**
* qdbg_parse_ctxt_to_buf() - parses queue context to human readable format
*
* @param[in] ctxt: raw context info
* @param[in] entries: context entries structure pointer
* @param[in] num_entries: number of context entries
* @param[out] buf: buffer to write parsed context
* @param[in] buflen: buffer len
*
* @return >0: size read
* @return <0: error
*****************************************************************************/
int qdbg_parse_ctxt_to_buf(u32 *ctxt,
struct dbgfs_qctxt_entry *entries,
int num_entries,
char *buf, int buflen)
{
int i = 0, w;
u32 v;
u64 mask = 0;
int len = 0;
for (i = num_entries - 1; i >= 0; i--) {
w = entries[i].word;
v = ((ctxt[w] >> entries[i].pos) &
(~((~mask) << entries[i].len)));
len += snprintf(buf + len, buflen - len,
"\t%-47s %#-10x %u\n",
entries[i].name, v, v);
}
len += snprintf(buf + len, buflen - len, "\n");
return len;
}
/*****************************************************************************/
/**
* qdbg_cntxt_read() - reads queue context for a queue
*
* @param[in] dev_hndl: xdev device handle
* @param[in] id: queue handle
* @param[out] buf: buffer to collect the context info
* @param[in] buflen: buffer len
* @param[in] type: context type
*
* @return >0: size read
* @return <0: error
*****************************************************************************/
int qdbg_cntxt_read(unsigned long dev_hndl, unsigned long id, char **data,
int *data_len, enum dbgfs_desc_type type)
{
int rv = 0;
int len = 0;
int num_entries = 0;
char *buf = NULL;
int buflen = DEBUGFS_QUEUE_CTXT_SZ;
struct hw_descq_context ctxt;
struct qdma_descq *descq = NULL;
struct xlnx_dma_dev *xdev = (struct xlnx_dma_dev *)dev_hndl;
if (!xdev)
return -EINVAL;
if (xdev_check_hndl(__func__, xdev->conf.pdev, dev_hndl) < 0)
return -EINVAL;
/* allocate memory */
buf = (char *) kzalloc(buflen, GFP_KERNEL);
if (!buf)
return -ENOMEM;
/** get descq by id */
descq = qdma_device_get_descq_by_id(xdev, id, buf, buflen, 0);
if (!descq) {
kfree(buf);
return QDMA_ERR_INVALID_QIDX;
}
/** initialize the context */
memset(&ctxt, 0, sizeof(struct hw_descq_context));
/** read the descq context for the given qid */
rv = qdma_descq_context_read(descq->xdev, descq->qidx_hw,
descq->conf.st, descq->conf.c2h, &ctxt);
if (rv < 0) {
len += sprintf(buf + len, "%s read context failed %d.\n",
descq->conf.name, rv);
buf[len] = '\0';
*data = buf;
*data_len = buflen;
return rv;
}
if (type == DBGFS_DESC_TYPE_CMPT) {
/** convert CMPT context to human readable text */
len += snprintf(buf + len, buflen - len, "CMPT CTXT:\n");
num_entries = sizeof(cmpt_ctxt)/sizeof(cmpt_ctxt[0]);
len += qdbg_parse_ctxt_to_buf(ctxt.cmpt, cmpt_ctxt,
num_entries, buf + len, buflen - len);
} else {
/** convert SW context to human readable text */
len += snprintf(buf + len, buflen - len, "SOFTWARE CTXT:\n");
num_entries = sizeof(app_ctxt)/sizeof(app_ctxt[0]);
len += qdbg_parse_ctxt_to_buf(ctxt.sw, app_ctxt,
num_entries, buf + len, buflen - len);
/** convert hardware context to human readable text */
len += snprintf(buf + len, buflen - len, "HARDWARE CTXT:\n");
num_entries = sizeof(hw_ctxt)/sizeof(hw_ctxt[0]);
len += qdbg_parse_ctxt_to_buf(ctxt.hw, hw_ctxt,
num_entries, buf + len, buflen - len);
if (!(descq->conf.st && descq->conf.c2h))
goto cntxt_exit;
/** convert credit context to human readable text */
len += snprintf(buf + len, buflen - len, "CREDIT CTXT:\n");
num_entries = sizeof(credit_ctxt)/sizeof(credit_ctxt[0]);
len += qdbg_parse_ctxt_to_buf(ctxt.cr, credit_ctxt,
num_entries, buf + len, buflen - len);
if (type == DBGFS_DESC_TYPE_C2H) {
/** convert prefetch context to human readable text */
len += snprintf(buf + len, buflen - len,
"PREFETCH CTXT:\n");
num_entries =
sizeof(c2h_pftch_ctxt)/sizeof(c2h_pftch_ctxt[0]);
len += qdbg_parse_ctxt_to_buf(ctxt.prefetch,
c2h_pftch_ctxt,
num_entries, buf + len, buflen - len);
}
}
cntxt_exit:
buf[len] = '\0';
*data = buf;
*data_len = buflen;
return len;
}
/*****************************************************************************/
/**
* qdbg_info_read() - reads queue info for a queue
*
* @param[in] dev_hndl: xdev device handle
* @param[in] id: queue handle
* @param[out] data: buffer pointer to collect the queue info
* @param[out] data_len: buffer len pointer
* @param[in] type: ring type
*
* @return >0: size read
* @return <0: error
*****************************************************************************/
int qdbg_info_read(unsigned long dev_hndl, unsigned long id, char **data,
int *data_len, enum dbgfs_desc_type type)
{
int len = 0;
char *buf = NULL;
int buflen = DEBUGFS_QUEUE_INFO_SZ;
struct qdma_descq *descq = NULL;
struct xlnx_dma_dev *xdev = (struct xlnx_dma_dev *)dev_hndl;
/** allocate memory */
buf = (char *) kzalloc(buflen, GFP_KERNEL);
if (!buf)
return -ENOMEM;
descq = qdma_device_get_descq_by_id(xdev, id, buf, buflen, 0);
if (!descq) {
kfree(buf);
return QDMA_ERR_INVALID_QIDX;
}
len = qdma_descq_dump_state(descq, buf + len, buflen - len);
*data = buf;
*data_len = buflen;
return len;
}
/*****************************************************************************/
/**
* qdbg_desc_read() - reads descriptors of a queue
*
* @param[in] dev_hndl: xdev device handle
* @param[in] id: queue handle
* @param[out] data: buffer pointer to collect the queue descriptors
* @param[out] data_len: buffer len pointer
* @param[in] type: ring type
*
* @return >0: size read
* @return <0: error
*****************************************************************************/
int qdbg_desc_read(unsigned long dev_hndl, unsigned long id, char **data,
int *data_len, enum dbgfs_desc_type type)
{
int len = 0;
int rngsz = 0;
struct qdma_descq *descq = NULL;
struct xlnx_dma_dev *xdev = (struct xlnx_dma_dev *)dev_hndl;
char *buf = NULL;
int buflen = 0;
descq = qdma_device_get_descq_by_id(xdev, id, buf, buflen, 0);
if (!descq)
return QDMA_ERR_INVALID_QIDX;
/** get the ring size */
if (type != DBGFS_DESC_TYPE_CMPT)
rngsz = descq->conf.rngsz;
else
rngsz = descq->conf.rngsz_cmpt;
/** 128 bytes is to accomodate header printed in the begining */
buflen = (rngsz * DEBUGFS_QUEUE_DESC_SZ) + 128;
/* allocate memory */
buf = (char *) kzalloc(buflen, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (type != DBGFS_DESC_TYPE_CMPT) {
len += qdma_queue_dump_desc(dev_hndl, id,
0, rngsz-1, buf + len, buflen - len);
} else {
len += qdma_queue_dump_cmpt(dev_hndl, id,
0, rngsz-1, buf + len, buflen - len);
}
*data = buf;
*data_len = buflen;
return len;
}
/*****************************************************************************/
/**
* q_dbg_file_read() - static function that provides common read
*
* @param[in] fp: pointer to file structure
* @param[out] user_buffer: pointer to user buffer
* @param[in] count: size of data to read
* @param[in/out] ppos: pointer to offset read
* @param[in] type: information type
*
* @return >0: size read
* @return <0: error
*****************************************************************************/
static ssize_t q_dbg_file_read(struct file *fp, char __user *user_buffer,
size_t count, loff_t *ppos, enum dbgfs_queue_info_type type)
{
char *buf = NULL;
int buf_len = 0, len = 0, rv = 0;
struct dbgfs_q_priv *qpriv = (struct dbgfs_q_priv *)fp->private_data;
if (qpriv->data == NULL && qpriv->datalen == 0) {
if (type == DBGFS_QINFO_INFO) {
rv = qdbg_info_read(qpriv->dev_hndl, qpriv->qhndl,
&buf, &buf_len, DBGFS_DESC_TYPE_C2H);
} else if (type == DBGFS_QINFO_CNTXT) {
rv = qdbg_cntxt_read(qpriv->dev_hndl, qpriv->qhndl,
&buf, &buf_len, DBGFS_DESC_TYPE_C2H);
} else if (type == DBGFS_QINFO_DESC) {
rv = qdbg_desc_read(qpriv->dev_hndl, qpriv->qhndl,
&buf, &buf_len, DBGFS_DESC_TYPE_C2H);
}
if (rv < 0)
goto q_dbg_file_read_exit;
qpriv->datalen = rv;
qpriv->data = buf;
}
buf = qpriv->data;
len = qpriv->datalen;
if (!buf)
goto q_dbg_file_read_exit;
/** write to user buffer */
if (*ppos >= len) {
rv = 0;
goto q_dbg_file_read_exit;
}
if (*ppos + count > len)
count = len - *ppos;
if (copy_to_user(user_buffer, buf + *ppos, count)) {
rv = -EFAULT;
goto q_dbg_file_read_exit;
}
*ppos += count;
rv = count;
pr_debug("number of bytes written to user space is %zu\n", count);
q_dbg_file_read_exit:
kfree(buf);
qpriv->data = NULL;
qpriv->datalen = 0;
return rv;
}
/*****************************************************************************/
/**
* q_info_open() - static function that executes info file open
*
* @param[in] inode: pointer to file inode
* @param[in] fp: pointer to file structure
*
* @return 0: success
* @return <0: error
*****************************************************************************/
static int q_info_open(struct inode *inode, struct file *fp)
{
return q_dbg_file_open(inode, fp);
}
/*****************************************************************************/
/**
* q_info_read() - static function that executes info file read
*
* @param[in] fp: pointer to file structure
* @param[out] user_buffer: pointer to user buffer
* @param[in] count: size of data to read
* @param[in/out] ppos: pointer to offset read
*
* @return >0: size read
* @return <0: error
*****************************************************************************/
static ssize_t q_info_read(struct file *fp, char __user *user_buffer,
size_t count, loff_t *ppos)
{
return q_dbg_file_read(fp, user_buffer, count, ppos, DBGFS_QINFO_INFO);
}
/*****************************************************************************/
/**
* q_cntxt_open() - static function that executes cntxt file open
*
* @param[in] inode: pointer to file inode
* @param[in] fp: pointer to file structure
*
* @return 0: success
* @return <0: error
*****************************************************************************/
static int q_cntxt_open(struct inode *inode, struct file *fp)
{
return q_dbg_file_open(inode, fp);
}
/*****************************************************************************/
/**
* q_cntxt_read() - static function that performs cntxt file read
*
* @param[in] fp: pointer to file structure
* @param[out] user_buffer: pointer to user buffer
* @param[in] count: size of data to read
* @param[in/out] ppos: pointer to offset read
*
* @return >0: size read
* @return <0: error
*****************************************************************************/
static ssize_t q_cntxt_read(struct file *fp, char __user *user_buffer,
size_t count, loff_t *ppos)
{
return q_dbg_file_read(fp, user_buffer, count, ppos, DBGFS_QINFO_CNTXT);
}
/*****************************************************************************/
/**
* q_desc_open() - static function that executes desc file open
*
* @param[in] inode: pointer to file inode
* @param[in] fp: pointer to file structure
*
* @return 0: success
* @return <0: error
*****************************************************************************/
static int q_desc_open(struct inode *inode, struct file *fp)
{
return q_dbg_file_open(inode, fp);
}
/*****************************************************************************/
/**
* q_desc_read() - static function that executes desc read
*
* @param[in] fp: pointer to file structure
* @param[out] user_buffer: pointer to user buffer
* @param[in] count: size of data to read
* @param[in/out] ppos: pointer to offset read
*