1 #ifdef CONFIG_DEBUG_FS
2 /*
3 *
4 * This file is provided under a dual BSD/GPLv2 license. When using or
5 * redistributing this file, you may do so under either license.
6 *
7 * GPL LICENSE SUMMARY
8 *
9 * Copyright(c) 2015 Intel Corporation.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * BSD LICENSE
21 *
22 * Copyright(c) 2015 Intel Corporation.
23 *
24 * Redistribution and use in source and binary forms, with or without
25 * modification, are permitted provided that the following conditions
26 * are met:
27 *
28 * - Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * - Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in
32 * the documentation and/or other materials provided with the
33 * distribution.
34 * - Neither the name of Intel Corporation nor the names of its
35 * contributors may be used to endorse or promote products derived
36 * from this software without specific prior written permission.
37 *
38 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
39 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
40 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
41 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
42 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
44 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
45 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
46 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
47 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
48 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
49 *
50 */
51 #include <linux/debugfs.h>
52 #include <linux/seq_file.h>
53 #include <linux/kernel.h>
54 #include <linux/export.h>
55
56 #include "hfi.h"
57 #include "debugfs.h"
58 #include "device.h"
59 #include "qp.h"
60 #include "sdma.h"
61
62 static struct dentry *hfi1_dbg_root;
63
64 #define private2dd(file) (file_inode(file)->i_private)
65 #define private2ppd(file) (file_inode(file)->i_private)
66
67 #define DEBUGFS_SEQ_FILE_OPS(name) \
68 static const struct seq_operations _##name##_seq_ops = { \
69 .start = _##name##_seq_start, \
70 .next = _##name##_seq_next, \
71 .stop = _##name##_seq_stop, \
72 .show = _##name##_seq_show \
73 }
74 #define DEBUGFS_SEQ_FILE_OPEN(name) \
75 static int _##name##_open(struct inode *inode, struct file *s) \
76 { \
77 struct seq_file *seq; \
78 int ret; \
79 ret = seq_open(s, &_##name##_seq_ops); \
80 if (ret) \
81 return ret; \
82 seq = s->private_data; \
83 seq->private = inode->i_private; \
84 return 0; \
85 }
86
87 #define DEBUGFS_FILE_OPS(name) \
88 static const struct file_operations _##name##_file_ops = { \
89 .owner = THIS_MODULE, \
90 .open = _##name##_open, \
91 .read = seq_read, \
92 .llseek = seq_lseek, \
93 .release = seq_release \
94 }
95
96 #define DEBUGFS_FILE_CREATE(name, parent, data, ops, mode) \
97 do { \
98 struct dentry *ent; \
99 ent = debugfs_create_file(name, mode, parent, \
100 data, ops); \
101 if (!ent) \
102 pr_warn("create of %s failed\n", name); \
103 } while (0)
104
105
106 #define DEBUGFS_SEQ_FILE_CREATE(name, parent, data) \
107 DEBUGFS_FILE_CREATE(#name, parent, data, &_##name##_file_ops, S_IRUGO)
108
_opcode_stats_seq_start(struct seq_file * s,loff_t * pos)109 static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
110 __acquires(RCU)
111 {
112 struct hfi1_opcode_stats_perctx *opstats;
113
114 rcu_read_lock();
115 if (*pos >= ARRAY_SIZE(opstats->stats))
116 return NULL;
117 return pos;
118 }
119
_opcode_stats_seq_next(struct seq_file * s,void * v,loff_t * pos)120 static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
121 {
122 struct hfi1_opcode_stats_perctx *opstats;
123
124 ++*pos;
125 if (*pos >= ARRAY_SIZE(opstats->stats))
126 return NULL;
127 return pos;
128 }
129
130
_opcode_stats_seq_stop(struct seq_file * s,void * v)131 static void _opcode_stats_seq_stop(struct seq_file *s, void *v)
132 __releases(RCU)
133 {
134 rcu_read_unlock();
135 }
136
_opcode_stats_seq_show(struct seq_file * s,void * v)137 static int _opcode_stats_seq_show(struct seq_file *s, void *v)
138 {
139 loff_t *spos = v;
140 loff_t i = *spos, j;
141 u64 n_packets = 0, n_bytes = 0;
142 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
143 struct hfi1_devdata *dd = dd_from_dev(ibd);
144
145 for (j = 0; j < dd->first_user_ctxt; j++) {
146 if (!dd->rcd[j])
147 continue;
148 n_packets += dd->rcd[j]->opstats->stats[i].n_packets;
149 n_bytes += dd->rcd[j]->opstats->stats[i].n_bytes;
150 }
151 if (!n_packets && !n_bytes)
152 return SEQ_SKIP;
153 seq_printf(s, "%02llx %llu/%llu\n", i,
154 (unsigned long long) n_packets,
155 (unsigned long long) n_bytes);
156
157 return 0;
158 }
159
160 DEBUGFS_SEQ_FILE_OPS(opcode_stats);
161 DEBUGFS_SEQ_FILE_OPEN(opcode_stats)
162 DEBUGFS_FILE_OPS(opcode_stats);
163
_ctx_stats_seq_start(struct seq_file * s,loff_t * pos)164 static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
165 {
166 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
167 struct hfi1_devdata *dd = dd_from_dev(ibd);
168
169 if (!*pos)
170 return SEQ_START_TOKEN;
171 if (*pos >= dd->first_user_ctxt)
172 return NULL;
173 return pos;
174 }
175
_ctx_stats_seq_next(struct seq_file * s,void * v,loff_t * pos)176 static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
177 {
178 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
179 struct hfi1_devdata *dd = dd_from_dev(ibd);
180
181 if (v == SEQ_START_TOKEN)
182 return pos;
183
184 ++*pos;
185 if (*pos >= dd->first_user_ctxt)
186 return NULL;
187 return pos;
188 }
189
_ctx_stats_seq_stop(struct seq_file * s,void * v)190 static void _ctx_stats_seq_stop(struct seq_file *s, void *v)
191 {
192 /* nothing allocated */
193 }
194
_ctx_stats_seq_show(struct seq_file * s,void * v)195 static int _ctx_stats_seq_show(struct seq_file *s, void *v)
196 {
197 loff_t *spos;
198 loff_t i, j;
199 u64 n_packets = 0;
200 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
201 struct hfi1_devdata *dd = dd_from_dev(ibd);
202
203 if (v == SEQ_START_TOKEN) {
204 seq_puts(s, "Ctx:npkts\n");
205 return 0;
206 }
207
208 spos = v;
209 i = *spos;
210
211 if (!dd->rcd[i])
212 return SEQ_SKIP;
213
214 for (j = 0; j < ARRAY_SIZE(dd->rcd[i]->opstats->stats); j++)
215 n_packets += dd->rcd[i]->opstats->stats[j].n_packets;
216
217 if (!n_packets)
218 return SEQ_SKIP;
219
220 seq_printf(s, " %llu:%llu\n", i, n_packets);
221 return 0;
222 }
223
224 DEBUGFS_SEQ_FILE_OPS(ctx_stats);
225 DEBUGFS_SEQ_FILE_OPEN(ctx_stats)
226 DEBUGFS_FILE_OPS(ctx_stats);
227
_qp_stats_seq_start(struct seq_file * s,loff_t * pos)228 static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)
229 __acquires(RCU)
230 {
231 struct qp_iter *iter;
232 loff_t n = *pos;
233
234 rcu_read_lock();
235 iter = qp_iter_init(s->private);
236 if (!iter)
237 return NULL;
238
239 while (n--) {
240 if (qp_iter_next(iter)) {
241 kfree(iter);
242 return NULL;
243 }
244 }
245
246 return iter;
247 }
248
_qp_stats_seq_next(struct seq_file * s,void * iter_ptr,loff_t * pos)249 static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr,
250 loff_t *pos)
251 {
252 struct qp_iter *iter = iter_ptr;
253
254 (*pos)++;
255
256 if (qp_iter_next(iter)) {
257 kfree(iter);
258 return NULL;
259 }
260
261 return iter;
262 }
263
_qp_stats_seq_stop(struct seq_file * s,void * iter_ptr)264 static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)
265 __releases(RCU)
266 {
267 rcu_read_unlock();
268 }
269
_qp_stats_seq_show(struct seq_file * s,void * iter_ptr)270 static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)
271 {
272 struct qp_iter *iter = iter_ptr;
273
274 if (!iter)
275 return 0;
276
277 qp_iter_print(s, iter);
278
279 return 0;
280 }
281
282 DEBUGFS_SEQ_FILE_OPS(qp_stats);
283 DEBUGFS_SEQ_FILE_OPEN(qp_stats)
284 DEBUGFS_FILE_OPS(qp_stats);
285
_sdes_seq_start(struct seq_file * s,loff_t * pos)286 static void *_sdes_seq_start(struct seq_file *s, loff_t *pos)
287 __acquires(RCU)
288 {
289 struct hfi1_ibdev *ibd;
290 struct hfi1_devdata *dd;
291
292 rcu_read_lock();
293 ibd = (struct hfi1_ibdev *)s->private;
294 dd = dd_from_dev(ibd);
295 if (!dd->per_sdma || *pos >= dd->num_sdma)
296 return NULL;
297 return pos;
298 }
299
_sdes_seq_next(struct seq_file * s,void * v,loff_t * pos)300 static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos)
301 {
302 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
303 struct hfi1_devdata *dd = dd_from_dev(ibd);
304
305 ++*pos;
306 if (!dd->per_sdma || *pos >= dd->num_sdma)
307 return NULL;
308 return pos;
309 }
310
311
_sdes_seq_stop(struct seq_file * s,void * v)312 static void _sdes_seq_stop(struct seq_file *s, void *v)
313 __releases(RCU)
314 {
315 rcu_read_unlock();
316 }
317
_sdes_seq_show(struct seq_file * s,void * v)318 static int _sdes_seq_show(struct seq_file *s, void *v)
319 {
320 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
321 struct hfi1_devdata *dd = dd_from_dev(ibd);
322 loff_t *spos = v;
323 loff_t i = *spos;
324
325 sdma_seqfile_dump_sde(s, &dd->per_sdma[i]);
326 return 0;
327 }
328
329 DEBUGFS_SEQ_FILE_OPS(sdes);
330 DEBUGFS_SEQ_FILE_OPEN(sdes)
331 DEBUGFS_FILE_OPS(sdes);
332
333 /* read the per-device counters */
dev_counters_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)334 static ssize_t dev_counters_read(struct file *file, char __user *buf,
335 size_t count, loff_t *ppos)
336 {
337 u64 *counters;
338 size_t avail;
339 struct hfi1_devdata *dd;
340 ssize_t rval;
341
342 rcu_read_lock();
343 dd = private2dd(file);
344 avail = hfi1_read_cntrs(dd, *ppos, NULL, &counters);
345 rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
346 rcu_read_unlock();
347 return rval;
348 }
349
350 /* read the per-device counters */
dev_names_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)351 static ssize_t dev_names_read(struct file *file, char __user *buf,
352 size_t count, loff_t *ppos)
353 {
354 char *names;
355 size_t avail;
356 struct hfi1_devdata *dd;
357 ssize_t rval;
358
359 rcu_read_lock();
360 dd = private2dd(file);
361 avail = hfi1_read_cntrs(dd, *ppos, &names, NULL);
362 rval = simple_read_from_buffer(buf, count, ppos, names, avail);
363 rcu_read_unlock();
364 return rval;
365 }
366
367 struct counter_info {
368 char *name;
369 const struct file_operations ops;
370 };
371
372 /*
373 * Could use file_inode(file)->i_ino to figure out which file,
374 * instead of separate routine for each, but for now, this works...
375 */
376
377 /* read the per-port names (same for each port) */
portnames_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)378 static ssize_t portnames_read(struct file *file, char __user *buf,
379 size_t count, loff_t *ppos)
380 {
381 char *names;
382 size_t avail;
383 struct hfi1_devdata *dd;
384 ssize_t rval;
385
386 rcu_read_lock();
387 dd = private2dd(file);
388 /* port number n/a here since names are constant */
389 avail = hfi1_read_portcntrs(dd, *ppos, 0, &names, NULL);
390 rval = simple_read_from_buffer(buf, count, ppos, names, avail);
391 rcu_read_unlock();
392 return rval;
393 }
394
395 /* read the per-port counters */
portcntrs_debugfs_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)396 static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf,
397 size_t count, loff_t *ppos)
398 {
399 u64 *counters;
400 size_t avail;
401 struct hfi1_devdata *dd;
402 struct hfi1_pportdata *ppd;
403 ssize_t rval;
404
405 rcu_read_lock();
406 ppd = private2ppd(file);
407 dd = ppd->dd;
408 avail = hfi1_read_portcntrs(dd, *ppos, ppd->port - 1, NULL, &counters);
409 rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
410 rcu_read_unlock();
411 return rval;
412 }
413
414 /*
415 * read the per-port QSFP data for ppd
416 */
qsfp_debugfs_dump(struct file * file,char __user * buf,size_t count,loff_t * ppos)417 static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf,
418 size_t count, loff_t *ppos)
419 {
420 struct hfi1_pportdata *ppd;
421 char *tmp;
422 int ret;
423
424 rcu_read_lock();
425 ppd = private2ppd(file);
426 tmp = kmalloc(PAGE_SIZE, GFP_KERNEL);
427 if (!tmp) {
428 rcu_read_unlock();
429 return -ENOMEM;
430 }
431
432 ret = qsfp_dump(ppd, tmp, PAGE_SIZE);
433 if (ret > 0)
434 ret = simple_read_from_buffer(buf, count, ppos, tmp, ret);
435 rcu_read_unlock();
436 kfree(tmp);
437 return ret;
438 }
439
440 /* Do an i2c write operation on the chain for the given HFI. */
__i2c_debugfs_write(struct file * file,const char __user * buf,size_t count,loff_t * ppos,u32 target)441 static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf,
442 size_t count, loff_t *ppos, u32 target)
443 {
444 struct hfi1_pportdata *ppd;
445 char *buff;
446 int ret;
447 int i2c_addr;
448 int offset;
449 int total_written;
450
451 rcu_read_lock();
452 ppd = private2ppd(file);
453
454 buff = kmalloc(count, GFP_KERNEL);
455 if (!buff) {
456 ret = -ENOMEM;
457 goto _return;
458 }
459
460 ret = copy_from_user(buff, buf, count);
461 if (ret > 0) {
462 ret = -EFAULT;
463 goto _free;
464 }
465
466 i2c_addr = (*ppos >> 16) & 0xff;
467 offset = *ppos & 0xffff;
468
469 total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count);
470 if (total_written < 0) {
471 ret = total_written;
472 goto _free;
473 }
474
475 *ppos += total_written;
476
477 ret = total_written;
478
479 _free:
480 kfree(buff);
481 _return:
482 rcu_read_unlock();
483 return ret;
484 }
485
486 /* Do an i2c write operation on chain for HFI 0. */
i2c1_debugfs_write(struct file * file,const char __user * buf,size_t count,loff_t * ppos)487 static ssize_t i2c1_debugfs_write(struct file *file, const char __user *buf,
488 size_t count, loff_t *ppos)
489 {
490 return __i2c_debugfs_write(file, buf, count, ppos, 0);
491 }
492
493 /* Do an i2c write operation on chain for HFI 1. */
i2c2_debugfs_write(struct file * file,const char __user * buf,size_t count,loff_t * ppos)494 static ssize_t i2c2_debugfs_write(struct file *file, const char __user *buf,
495 size_t count, loff_t *ppos)
496 {
497 return __i2c_debugfs_write(file, buf, count, ppos, 1);
498 }
499
500 /* Do an i2c read operation on the chain for the given HFI. */
__i2c_debugfs_read(struct file * file,char __user * buf,size_t count,loff_t * ppos,u32 target)501 static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf,
502 size_t count, loff_t *ppos, u32 target)
503 {
504 struct hfi1_pportdata *ppd;
505 char *buff;
506 int ret;
507 int i2c_addr;
508 int offset;
509 int total_read;
510
511 rcu_read_lock();
512 ppd = private2ppd(file);
513
514 buff = kmalloc(count, GFP_KERNEL);
515 if (!buff) {
516 ret = -ENOMEM;
517 goto _return;
518 }
519
520 i2c_addr = (*ppos >> 16) & 0xff;
521 offset = *ppos & 0xffff;
522
523 total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count);
524 if (total_read < 0) {
525 ret = total_read;
526 goto _free;
527 }
528
529 *ppos += total_read;
530
531 ret = copy_to_user(buf, buff, total_read);
532 if (ret > 0) {
533 ret = -EFAULT;
534 goto _free;
535 }
536
537 ret = total_read;
538
539 _free:
540 kfree(buff);
541 _return:
542 rcu_read_unlock();
543 return ret;
544 }
545
546 /* Do an i2c read operation on chain for HFI 0. */
i2c1_debugfs_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)547 static ssize_t i2c1_debugfs_read(struct file *file, char __user *buf,
548 size_t count, loff_t *ppos)
549 {
550 return __i2c_debugfs_read(file, buf, count, ppos, 0);
551 }
552
553 /* Do an i2c read operation on chain for HFI 1. */
i2c2_debugfs_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)554 static ssize_t i2c2_debugfs_read(struct file *file, char __user *buf,
555 size_t count, loff_t *ppos)
556 {
557 return __i2c_debugfs_read(file, buf, count, ppos, 1);
558 }
559
560 /* Do a QSFP write operation on the i2c chain for the given HFI. */
__qsfp_debugfs_write(struct file * file,const char __user * buf,size_t count,loff_t * ppos,u32 target)561 static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf,
562 size_t count, loff_t *ppos, u32 target)
563 {
564 struct hfi1_pportdata *ppd;
565 char *buff;
566 int ret;
567 int total_written;
568
569 rcu_read_lock();
570 if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */
571 ret = -EINVAL;
572 goto _return;
573 }
574
575 ppd = private2ppd(file);
576
577 buff = kmalloc(count, GFP_KERNEL);
578 if (!buff) {
579 ret = -ENOMEM;
580 goto _return;
581 }
582
583 ret = copy_from_user(buff, buf, count);
584 if (ret > 0) {
585 ret = -EFAULT;
586 goto _free;
587 }
588
589 total_written = qsfp_write(ppd, target, *ppos, buff, count);
590 if (total_written < 0) {
591 ret = total_written;
592 goto _free;
593 }
594
595 *ppos += total_written;
596
597 ret = total_written;
598
599 _free:
600 kfree(buff);
601 _return:
602 rcu_read_unlock();
603 return ret;
604 }
605
606 /* Do a QSFP write operation on i2c chain for HFI 0. */
qsfp1_debugfs_write(struct file * file,const char __user * buf,size_t count,loff_t * ppos)607 static ssize_t qsfp1_debugfs_write(struct file *file, const char __user *buf,
608 size_t count, loff_t *ppos)
609 {
610 return __qsfp_debugfs_write(file, buf, count, ppos, 0);
611 }
612
613 /* Do a QSFP write operation on i2c chain for HFI 1. */
qsfp2_debugfs_write(struct file * file,const char __user * buf,size_t count,loff_t * ppos)614 static ssize_t qsfp2_debugfs_write(struct file *file, const char __user *buf,
615 size_t count, loff_t *ppos)
616 {
617 return __qsfp_debugfs_write(file, buf, count, ppos, 1);
618 }
619
620 /* Do a QSFP read operation on the i2c chain for the given HFI. */
__qsfp_debugfs_read(struct file * file,char __user * buf,size_t count,loff_t * ppos,u32 target)621 static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf,
622 size_t count, loff_t *ppos, u32 target)
623 {
624 struct hfi1_pportdata *ppd;
625 char *buff;
626 int ret;
627 int total_read;
628
629 rcu_read_lock();
630 if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */
631 ret = -EINVAL;
632 goto _return;
633 }
634
635 ppd = private2ppd(file);
636
637 buff = kmalloc(count, GFP_KERNEL);
638 if (!buff) {
639 ret = -ENOMEM;
640 goto _return;
641 }
642
643 total_read = qsfp_read(ppd, target, *ppos, buff, count);
644 if (total_read < 0) {
645 ret = total_read;
646 goto _free;
647 }
648
649 *ppos += total_read;
650
651 ret = copy_to_user(buf, buff, total_read);
652 if (ret > 0) {
653 ret = -EFAULT;
654 goto _free;
655 }
656
657 ret = total_read;
658
659 _free:
660 kfree(buff);
661 _return:
662 rcu_read_unlock();
663 return ret;
664 }
665
666 /* Do a QSFP read operation on i2c chain for HFI 0. */
qsfp1_debugfs_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)667 static ssize_t qsfp1_debugfs_read(struct file *file, char __user *buf,
668 size_t count, loff_t *ppos)
669 {
670 return __qsfp_debugfs_read(file, buf, count, ppos, 0);
671 }
672
673 /* Do a QSFP read operation on i2c chain for HFI 1. */
qsfp2_debugfs_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)674 static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf,
675 size_t count, loff_t *ppos)
676 {
677 return __qsfp_debugfs_read(file, buf, count, ppos, 1);
678 }
679
680 #define DEBUGFS_OPS(nm, readroutine, writeroutine) \
681 { \
682 .name = nm, \
683 .ops = { \
684 .read = readroutine, \
685 .write = writeroutine, \
686 .llseek = generic_file_llseek, \
687 }, \
688 }
689
690 static const struct counter_info cntr_ops[] = {
691 DEBUGFS_OPS("counter_names", dev_names_read, NULL),
692 DEBUGFS_OPS("counters", dev_counters_read, NULL),
693 DEBUGFS_OPS("portcounter_names", portnames_read, NULL),
694 };
695
696 static const struct counter_info port_cntr_ops[] = {
697 DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL),
698 DEBUGFS_OPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write),
699 DEBUGFS_OPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write),
700 DEBUGFS_OPS("qsfp_dump%d", qsfp_debugfs_dump, NULL),
701 DEBUGFS_OPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write),
702 DEBUGFS_OPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write),
703 };
704
hfi1_dbg_ibdev_init(struct hfi1_ibdev * ibd)705 void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd)
706 {
707 char name[sizeof("port0counters") + 1];
708 char link[10];
709 struct hfi1_devdata *dd = dd_from_dev(ibd);
710 struct hfi1_pportdata *ppd;
711 int unit = dd->unit;
712 int i, j;
713
714 if (!hfi1_dbg_root)
715 return;
716 snprintf(name, sizeof(name), "%s_%d", class_name(), unit);
717 snprintf(link, sizeof(link), "%d", unit);
718 ibd->hfi1_ibdev_dbg = debugfs_create_dir(name, hfi1_dbg_root);
719 if (!ibd->hfi1_ibdev_dbg) {
720 pr_warn("create of %s failed\n", name);
721 return;
722 }
723 ibd->hfi1_ibdev_link =
724 debugfs_create_symlink(link, hfi1_dbg_root, name);
725 if (!ibd->hfi1_ibdev_link) {
726 pr_warn("create of %s symlink failed\n", name);
727 return;
728 }
729 DEBUGFS_SEQ_FILE_CREATE(opcode_stats, ibd->hfi1_ibdev_dbg, ibd);
730 DEBUGFS_SEQ_FILE_CREATE(ctx_stats, ibd->hfi1_ibdev_dbg, ibd);
731 DEBUGFS_SEQ_FILE_CREATE(qp_stats, ibd->hfi1_ibdev_dbg, ibd);
732 DEBUGFS_SEQ_FILE_CREATE(sdes, ibd->hfi1_ibdev_dbg, ibd);
733 /* dev counter files */
734 for (i = 0; i < ARRAY_SIZE(cntr_ops); i++)
735 DEBUGFS_FILE_CREATE(cntr_ops[i].name,
736 ibd->hfi1_ibdev_dbg,
737 dd,
738 &cntr_ops[i].ops, S_IRUGO);
739 /* per port files */
740 for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++)
741 for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) {
742 snprintf(name,
743 sizeof(name),
744 port_cntr_ops[i].name,
745 j + 1);
746 DEBUGFS_FILE_CREATE(name,
747 ibd->hfi1_ibdev_dbg,
748 ppd,
749 &port_cntr_ops[i].ops,
750 port_cntr_ops[i].ops.write == NULL ?
751 S_IRUGO : S_IRUGO|S_IWUSR);
752 }
753 }
754
hfi1_dbg_ibdev_exit(struct hfi1_ibdev * ibd)755 void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd)
756 {
757 if (!hfi1_dbg_root)
758 goto out;
759 debugfs_remove(ibd->hfi1_ibdev_link);
760 debugfs_remove_recursive(ibd->hfi1_ibdev_dbg);
761 out:
762 ibd->hfi1_ibdev_dbg = NULL;
763 synchronize_rcu();
764 }
765
766 /*
767 * driver stats field names, one line per stat, single string. Used by
768 * programs like hfistats to print the stats in a way which works for
769 * different versions of drivers, without changing program source.
770 * if hfi1_ib_stats changes, this needs to change. Names need to be
771 * 12 chars or less (w/o newline), for proper display by hfistats utility.
772 */
773 static const char * const hfi1_statnames[] = {
774 /* must be element 0*/
775 "KernIntr",
776 "ErrorIntr",
777 "Tx_Errs",
778 "Rcv_Errs",
779 "H/W_Errs",
780 "NoPIOBufs",
781 "CtxtsOpen",
782 "RcvLen_Errs",
783 "EgrBufFull",
784 "EgrHdrFull"
785 };
786
_driver_stats_names_seq_start(struct seq_file * s,loff_t * pos)787 static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos)
788 __acquires(RCU)
789 {
790 rcu_read_lock();
791 if (*pos >= ARRAY_SIZE(hfi1_statnames))
792 return NULL;
793 return pos;
794 }
795
_driver_stats_names_seq_next(struct seq_file * s,void * v,loff_t * pos)796 static void *_driver_stats_names_seq_next(
797 struct seq_file *s,
798 void *v,
799 loff_t *pos)
800 {
801 ++*pos;
802 if (*pos >= ARRAY_SIZE(hfi1_statnames))
803 return NULL;
804 return pos;
805 }
806
_driver_stats_names_seq_stop(struct seq_file * s,void * v)807 static void _driver_stats_names_seq_stop(struct seq_file *s, void *v)
808 __releases(RCU)
809 {
810 rcu_read_unlock();
811 }
812
_driver_stats_names_seq_show(struct seq_file * s,void * v)813 static int _driver_stats_names_seq_show(struct seq_file *s, void *v)
814 {
815 loff_t *spos = v;
816
817 seq_printf(s, "%s\n", hfi1_statnames[*spos]);
818 return 0;
819 }
820
821 DEBUGFS_SEQ_FILE_OPS(driver_stats_names);
822 DEBUGFS_SEQ_FILE_OPEN(driver_stats_names)
823 DEBUGFS_FILE_OPS(driver_stats_names);
824
_driver_stats_seq_start(struct seq_file * s,loff_t * pos)825 static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos)
826 __acquires(RCU)
827 {
828 rcu_read_lock();
829 if (*pos >= ARRAY_SIZE(hfi1_statnames))
830 return NULL;
831 return pos;
832 }
833
_driver_stats_seq_next(struct seq_file * s,void * v,loff_t * pos)834 static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
835 {
836 ++*pos;
837 if (*pos >= ARRAY_SIZE(hfi1_statnames))
838 return NULL;
839 return pos;
840 }
841
_driver_stats_seq_stop(struct seq_file * s,void * v)842 static void _driver_stats_seq_stop(struct seq_file *s, void *v)
843 __releases(RCU)
844 {
845 rcu_read_unlock();
846 }
847
hfi1_sps_ints(void)848 static u64 hfi1_sps_ints(void)
849 {
850 unsigned long flags;
851 struct hfi1_devdata *dd;
852 u64 sps_ints = 0;
853
854 spin_lock_irqsave(&hfi1_devs_lock, flags);
855 list_for_each_entry(dd, &hfi1_dev_list, list) {
856 sps_ints += get_all_cpu_total(dd->int_counter);
857 }
858 spin_unlock_irqrestore(&hfi1_devs_lock, flags);
859 return sps_ints;
860 }
861
_driver_stats_seq_show(struct seq_file * s,void * v)862 static int _driver_stats_seq_show(struct seq_file *s, void *v)
863 {
864 loff_t *spos = v;
865 char *buffer;
866 u64 *stats = (u64 *)&hfi1_stats;
867 size_t sz = seq_get_buf(s, &buffer);
868
869 if (sz < sizeof(u64))
870 return SEQ_SKIP;
871 /* special case for interrupts */
872 if (*spos == 0)
873 *(u64 *)buffer = hfi1_sps_ints();
874 else
875 *(u64 *)buffer = stats[*spos];
876 seq_commit(s, sizeof(u64));
877 return 0;
878 }
879
880 DEBUGFS_SEQ_FILE_OPS(driver_stats);
881 DEBUGFS_SEQ_FILE_OPEN(driver_stats)
882 DEBUGFS_FILE_OPS(driver_stats);
883
hfi1_dbg_init(void)884 void hfi1_dbg_init(void)
885 {
886 hfi1_dbg_root = debugfs_create_dir(DRIVER_NAME, NULL);
887 if (!hfi1_dbg_root)
888 pr_warn("init of debugfs failed\n");
889 DEBUGFS_SEQ_FILE_CREATE(driver_stats_names, hfi1_dbg_root, NULL);
890 DEBUGFS_SEQ_FILE_CREATE(driver_stats, hfi1_dbg_root, NULL);
891 }
892
hfi1_dbg_exit(void)893 void hfi1_dbg_exit(void)
894 {
895 debugfs_remove_recursive(hfi1_dbg_root);
896 hfi1_dbg_root = NULL;
897 }
898
899 #endif
900