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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright(c) 2015-2018 Intel Corporation.
4 */
5
6#include <linux/debugfs.h>
7#include <linux/seq_file.h>
8#include <linux/kernel.h>
9#include <linux/export.h>
10#include <linux/string.h>
11#include <linux/types.h>
12#include <linux/ratelimit.h>
13#include <linux/fault-inject.h>
14
15#include "hfi.h"
16#include "trace.h"
17#include "debugfs.h"
18#include "device.h"
19#include "qp.h"
20#include "sdma.h"
21#include "fault.h"
22
23static struct dentry *hfi1_dbg_root;
24
25/* wrappers to enforce srcu in seq file */
26ssize_t hfi1_seq_read(struct file *file, char __user *buf, size_t size,
27 loff_t *ppos)
28{
29 struct dentry *d = file->f_path.dentry;
30 ssize_t r;
31
32 r = debugfs_file_get(d);
33 if (unlikely(r))
34 return r;
35 r = seq_read(file, buf, size, ppos);
36 debugfs_file_put(d);
37 return r;
38}
39
40loff_t hfi1_seq_lseek(struct file *file, loff_t offset, int whence)
41{
42 struct dentry *d = file->f_path.dentry;
43 loff_t r;
44
45 r = debugfs_file_get(d);
46 if (unlikely(r))
47 return r;
48 r = seq_lseek(file, offset, whence);
49 debugfs_file_put(d);
50 return r;
51}
52
53#define private2dd(file) (file_inode(file)->i_private)
54#define private2ppd(file) (file_inode(file)->i_private)
55
56static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
57{
58 struct hfi1_opcode_stats_perctx *opstats;
59
60 if (*pos >= ARRAY_SIZE(opstats->stats))
61 return NULL;
62 return pos;
63}
64
65static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
66{
67 struct hfi1_opcode_stats_perctx *opstats;
68
69 ++*pos;
70 if (*pos >= ARRAY_SIZE(opstats->stats))
71 return NULL;
72 return pos;
73}
74
75static void _opcode_stats_seq_stop(struct seq_file *s, void *v)
76{
77}
78
79static int opcode_stats_show(struct seq_file *s, u8 i, u64 packets, u64 bytes)
80{
81 if (!packets && !bytes)
82 return SEQ_SKIP;
83 seq_printf(s, "%02x %llu/%llu\n", i,
84 (unsigned long long)packets,
85 (unsigned long long)bytes);
86
87 return 0;
88}
89
90static int _opcode_stats_seq_show(struct seq_file *s, void *v)
91{
92 loff_t *spos = v;
93 loff_t i = *spos, j;
94 u64 n_packets = 0, n_bytes = 0;
95 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
96 struct hfi1_devdata *dd = dd_from_dev(ibd);
97 struct hfi1_ctxtdata *rcd;
98
99 for (j = 0; j < dd->first_dyn_alloc_ctxt; j++) {
100 rcd = hfi1_rcd_get_by_index(dd, j);
101 if (rcd) {
102 n_packets += rcd->opstats->stats[i].n_packets;
103 n_bytes += rcd->opstats->stats[i].n_bytes;
104 }
105 hfi1_rcd_put(rcd);
106 }
107 return opcode_stats_show(s, i, n_packets, n_bytes);
108}
109
110DEBUGFS_SEQ_FILE_OPS(opcode_stats);
111DEBUGFS_SEQ_FILE_OPEN(opcode_stats)
112DEBUGFS_FILE_OPS(opcode_stats);
113
114static void *_tx_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
115{
116 return _opcode_stats_seq_start(s, pos);
117}
118
119static void *_tx_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
120{
121 return _opcode_stats_seq_next(s, v, pos);
122}
123
124static void _tx_opcode_stats_seq_stop(struct seq_file *s, void *v)
125{
126}
127
128static int _tx_opcode_stats_seq_show(struct seq_file *s, void *v)
129{
130 loff_t *spos = v;
131 loff_t i = *spos;
132 int j;
133 u64 n_packets = 0, n_bytes = 0;
134 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
135 struct hfi1_devdata *dd = dd_from_dev(ibd);
136
137 for_each_possible_cpu(j) {
138 struct hfi1_opcode_stats_perctx *s =
139 per_cpu_ptr(dd->tx_opstats, j);
140 n_packets += s->stats[i].n_packets;
141 n_bytes += s->stats[i].n_bytes;
142 }
143 return opcode_stats_show(s, i, n_packets, n_bytes);
144}
145
146DEBUGFS_SEQ_FILE_OPS(tx_opcode_stats);
147DEBUGFS_SEQ_FILE_OPEN(tx_opcode_stats)
148DEBUGFS_FILE_OPS(tx_opcode_stats);
149
150static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
151{
152 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
153 struct hfi1_devdata *dd = dd_from_dev(ibd);
154
155 if (!*pos)
156 return SEQ_START_TOKEN;
157 if (*pos >= dd->first_dyn_alloc_ctxt)
158 return NULL;
159 return pos;
160}
161
162static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
163{
164 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
165 struct hfi1_devdata *dd = dd_from_dev(ibd);
166
167 if (v == SEQ_START_TOKEN)
168 return pos;
169
170 ++*pos;
171 if (*pos >= dd->first_dyn_alloc_ctxt)
172 return NULL;
173 return pos;
174}
175
176static void _ctx_stats_seq_stop(struct seq_file *s, void *v)
177{
178 /* nothing allocated */
179}
180
181static int _ctx_stats_seq_show(struct seq_file *s, void *v)
182{
183 loff_t *spos;
184 loff_t i, j;
185 u64 n_packets = 0;
186 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
187 struct hfi1_devdata *dd = dd_from_dev(ibd);
188 struct hfi1_ctxtdata *rcd;
189
190 if (v == SEQ_START_TOKEN) {
191 seq_puts(s, "Ctx:npkts\n");
192 return 0;
193 }
194
195 spos = v;
196 i = *spos;
197
198 rcd = hfi1_rcd_get_by_index_safe(dd, i);
199 if (!rcd)
200 return SEQ_SKIP;
201
202 for (j = 0; j < ARRAY_SIZE(rcd->opstats->stats); j++)
203 n_packets += rcd->opstats->stats[j].n_packets;
204
205 hfi1_rcd_put(rcd);
206
207 if (!n_packets)
208 return SEQ_SKIP;
209
210 seq_printf(s, " %llu:%llu\n", i, n_packets);
211 return 0;
212}
213
214DEBUGFS_SEQ_FILE_OPS(ctx_stats);
215DEBUGFS_SEQ_FILE_OPEN(ctx_stats)
216DEBUGFS_FILE_OPS(ctx_stats);
217
218static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)
219 __acquires(RCU)
220{
221 struct rvt_qp_iter *iter;
222 loff_t n = *pos;
223
224 iter = rvt_qp_iter_init(s->private, 0, NULL);
225
226 /* stop calls rcu_read_unlock */
227 rcu_read_lock();
228
229 if (!iter)
230 return NULL;
231
232 do {
233 if (rvt_qp_iter_next(iter)) {
234 kfree(iter);
235 return NULL;
236 }
237 } while (n--);
238
239 return iter;
240}
241
242static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr,
243 loff_t *pos)
244 __must_hold(RCU)
245{
246 struct rvt_qp_iter *iter = iter_ptr;
247
248 (*pos)++;
249
250 if (rvt_qp_iter_next(iter)) {
251 kfree(iter);
252 return NULL;
253 }
254
255 return iter;
256}
257
258static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)
259 __releases(RCU)
260{
261 rcu_read_unlock();
262}
263
264static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)
265{
266 struct rvt_qp_iter *iter = iter_ptr;
267
268 if (!iter)
269 return 0;
270
271 qp_iter_print(s, iter);
272
273 return 0;
274}
275
276DEBUGFS_SEQ_FILE_OPS(qp_stats);
277DEBUGFS_SEQ_FILE_OPEN(qp_stats)
278DEBUGFS_FILE_OPS(qp_stats);
279
280static void *_sdes_seq_start(struct seq_file *s, loff_t *pos)
281{
282 struct hfi1_ibdev *ibd;
283 struct hfi1_devdata *dd;
284
285 ibd = (struct hfi1_ibdev *)s->private;
286 dd = dd_from_dev(ibd);
287 if (!dd->per_sdma || *pos >= dd->num_sdma)
288 return NULL;
289 return pos;
290}
291
292static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos)
293{
294 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
295 struct hfi1_devdata *dd = dd_from_dev(ibd);
296
297 ++*pos;
298 if (!dd->per_sdma || *pos >= dd->num_sdma)
299 return NULL;
300 return pos;
301}
302
303static void _sdes_seq_stop(struct seq_file *s, void *v)
304{
305}
306
307static int _sdes_seq_show(struct seq_file *s, void *v)
308{
309 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
310 struct hfi1_devdata *dd = dd_from_dev(ibd);
311 loff_t *spos = v;
312 loff_t i = *spos;
313
314 sdma_seqfile_dump_sde(s, &dd->per_sdma[i]);
315 return 0;
316}
317
318DEBUGFS_SEQ_FILE_OPS(sdes);
319DEBUGFS_SEQ_FILE_OPEN(sdes)
320DEBUGFS_FILE_OPS(sdes);
321
322static void *_rcds_seq_start(struct seq_file *s, loff_t *pos)
323{
324 struct hfi1_ibdev *ibd;
325 struct hfi1_devdata *dd;
326
327 ibd = (struct hfi1_ibdev *)s->private;
328 dd = dd_from_dev(ibd);
329 if (!dd->rcd || *pos >= dd->n_krcv_queues)
330 return NULL;
331 return pos;
332}
333
334static void *_rcds_seq_next(struct seq_file *s, void *v, loff_t *pos)
335{
336 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
337 struct hfi1_devdata *dd = dd_from_dev(ibd);
338
339 ++*pos;
340 if (!dd->rcd || *pos >= dd->num_rcv_contexts)
341 return NULL;
342 return pos;
343}
344
345static void _rcds_seq_stop(struct seq_file *s, void *v)
346{
347}
348
349static int _rcds_seq_show(struct seq_file *s, void *v)
350{
351 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
352 struct hfi1_devdata *dd = dd_from_dev(ibd);
353 struct hfi1_ctxtdata *rcd;
354 loff_t *spos = v;
355 loff_t i = *spos;
356
357 rcd = hfi1_rcd_get_by_index_safe(dd, i);
358 if (rcd)
359 seqfile_dump_rcd(s, rcd);
360 hfi1_rcd_put(rcd);
361 return 0;
362}
363
364DEBUGFS_SEQ_FILE_OPS(rcds);
365DEBUGFS_SEQ_FILE_OPEN(rcds)
366DEBUGFS_FILE_OPS(rcds);
367
368static void *_pios_seq_start(struct seq_file *s, loff_t *pos)
369{
370 struct hfi1_ibdev *ibd;
371 struct hfi1_devdata *dd;
372
373 ibd = (struct hfi1_ibdev *)s->private;
374 dd = dd_from_dev(ibd);
375 if (!dd->send_contexts || *pos >= dd->num_send_contexts)
376 return NULL;
377 return pos;
378}
379
380static void *_pios_seq_next(struct seq_file *s, void *v, loff_t *pos)
381{
382 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
383 struct hfi1_devdata *dd = dd_from_dev(ibd);
384
385 ++*pos;
386 if (!dd->send_contexts || *pos >= dd->num_send_contexts)
387 return NULL;
388 return pos;
389}
390
391static void _pios_seq_stop(struct seq_file *s, void *v)
392{
393}
394
395static int _pios_seq_show(struct seq_file *s, void *v)
396{
397 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
398 struct hfi1_devdata *dd = dd_from_dev(ibd);
399 struct send_context_info *sci;
400 loff_t *spos = v;
401 loff_t i = *spos;
402 unsigned long flags;
403
404 spin_lock_irqsave(&dd->sc_lock, flags);
405 sci = &dd->send_contexts[i];
406 if (sci && sci->type != SC_USER && sci->allocated && sci->sc)
407 seqfile_dump_sci(s, i, sci);
408 spin_unlock_irqrestore(&dd->sc_lock, flags);
409 return 0;
410}
411
412DEBUGFS_SEQ_FILE_OPS(pios);
413DEBUGFS_SEQ_FILE_OPEN(pios)
414DEBUGFS_FILE_OPS(pios);
415
416/* read the per-device counters */
417static ssize_t dev_counters_read(struct file *file, char __user *buf,
418 size_t count, loff_t *ppos)
419{
420 u64 *counters;
421 size_t avail;
422 struct hfi1_devdata *dd;
423 ssize_t rval;
424
425 dd = private2dd(file);
426 avail = hfi1_read_cntrs(dd, NULL, &counters);
427 rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
428 return rval;
429}
430
431/* read the per-device counters */
432static ssize_t dev_names_read(struct file *file, char __user *buf,
433 size_t count, loff_t *ppos)
434{
435 char *names;
436 size_t avail;
437 struct hfi1_devdata *dd;
438 ssize_t rval;
439
440 dd = private2dd(file);
441 avail = hfi1_read_cntrs(dd, &names, NULL);
442 rval = simple_read_from_buffer(buf, count, ppos, names, avail);
443 return rval;
444}
445
446struct counter_info {
447 char *name;
448 const struct file_operations ops;
449};
450
451/*
452 * Could use file_inode(file)->i_ino to figure out which file,
453 * instead of separate routine for each, but for now, this works...
454 */
455
456/* read the per-port names (same for each port) */
457static ssize_t portnames_read(struct file *file, char __user *buf,
458 size_t count, loff_t *ppos)
459{
460 char *names;
461 size_t avail;
462 struct hfi1_devdata *dd;
463 ssize_t rval;
464
465 dd = private2dd(file);
466 avail = hfi1_read_portcntrs(dd->pport, &names, NULL);
467 rval = simple_read_from_buffer(buf, count, ppos, names, avail);
468 return rval;
469}
470
471/* read the per-port counters */
472static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf,
473 size_t count, loff_t *ppos)
474{
475 u64 *counters;
476 size_t avail;
477 struct hfi1_pportdata *ppd;
478 ssize_t rval;
479
480 ppd = private2ppd(file);
481 avail = hfi1_read_portcntrs(ppd, NULL, &counters);
482 rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
483 return rval;
484}
485
486static void check_dyn_flag(u64 scratch0, char *p, int size, int *used,
487 int this_hfi, int hfi, u32 flag, const char *what)
488{
489 u32 mask;
490
491 mask = flag << (hfi ? CR_DYN_SHIFT : 0);
492 if (scratch0 & mask) {
493 *used += scnprintf(p + *used, size - *used,
494 " 0x%08x - HFI%d %s in use, %s device\n",
495 mask, hfi, what,
496 this_hfi == hfi ? "this" : "other");
497 }
498}
499
500static ssize_t asic_flags_read(struct file *file, char __user *buf,
501 size_t count, loff_t *ppos)
502{
503 struct hfi1_pportdata *ppd;
504 struct hfi1_devdata *dd;
505 u64 scratch0;
506 char *tmp;
507 int ret = 0;
508 int size;
509 int used;
510 int i;
511
512 ppd = private2ppd(file);
513 dd = ppd->dd;
514 size = PAGE_SIZE;
515 used = 0;
516 tmp = kmalloc(size, GFP_KERNEL);
517 if (!tmp)
518 return -ENOMEM;
519
520 scratch0 = read_csr(dd, ASIC_CFG_SCRATCH);
521 used += scnprintf(tmp + used, size - used,
522 "Resource flags: 0x%016llx\n", scratch0);
523
524 /* check permanent flag */
525 if (scratch0 & CR_THERM_INIT) {
526 used += scnprintf(tmp + used, size - used,
527 " 0x%08x - thermal monitoring initialized\n",
528 (u32)CR_THERM_INIT);
529 }
530
531 /* check each dynamic flag on each HFI */
532 for (i = 0; i < 2; i++) {
533 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
534 CR_SBUS, "SBus");
535 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
536 CR_EPROM, "EPROM");
537 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
538 CR_I2C1, "i2c chain 1");
539 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
540 CR_I2C2, "i2c chain 2");
541 }
542 used += scnprintf(tmp + used, size - used, "Write bits to clear\n");
543
544 ret = simple_read_from_buffer(buf, count, ppos, tmp, used);
545 kfree(tmp);
546 return ret;
547}
548
549static ssize_t asic_flags_write(struct file *file, const char __user *buf,
550 size_t count, loff_t *ppos)
551{
552 struct hfi1_pportdata *ppd;
553 struct hfi1_devdata *dd;
554 char *buff;
555 int ret;
556 unsigned long long value;
557 u64 scratch0;
558 u64 clear;
559
560 ppd = private2ppd(file);
561 dd = ppd->dd;
562
563 /* zero terminate and read the expected integer */
564 buff = memdup_user_nul(buf, count);
565 if (IS_ERR(buff))
566 return PTR_ERR(buff);
567
568 ret = kstrtoull(buff, 0, &value);
569 if (ret)
570 goto do_free;
571 clear = value;
572
573 /* obtain exclusive access */
574 mutex_lock(&dd->asic_data->asic_resource_mutex);
575 acquire_hw_mutex(dd);
576
577 scratch0 = read_csr(dd, ASIC_CFG_SCRATCH);
578 scratch0 &= ~clear;
579 write_csr(dd, ASIC_CFG_SCRATCH, scratch0);
580 /* force write to be visible to other HFI on another OS */
581 (void)read_csr(dd, ASIC_CFG_SCRATCH);
582
583 release_hw_mutex(dd);
584 mutex_unlock(&dd->asic_data->asic_resource_mutex);
585
586 /* return the number of bytes written */
587 ret = count;
588
589 do_free:
590 kfree(buff);
591 return ret;
592}
593
594/* read the dc8051 memory */
595static ssize_t dc8051_memory_read(struct file *file, char __user *buf,
596 size_t count, loff_t *ppos)
597{
598 struct hfi1_pportdata *ppd = private2ppd(file);
599 ssize_t rval;
600 void *tmp;
601 loff_t start, end;
602
603 /* the checks below expect the position to be positive */
604 if (*ppos < 0)
605 return -EINVAL;
606
607 tmp = kzalloc(DC8051_DATA_MEM_SIZE, GFP_KERNEL);
608 if (!tmp)
609 return -ENOMEM;
610
611 /*
612 * Fill in the requested portion of the temporary buffer from the
613 * 8051 memory. The 8051 memory read is done in terms of 8 bytes.
614 * Adjust start and end to fit. Skip reading anything if out of
615 * range.
616 */
617 start = *ppos & ~0x7; /* round down */
618 if (start < DC8051_DATA_MEM_SIZE) {
619 end = (*ppos + count + 7) & ~0x7; /* round up */
620 if (end > DC8051_DATA_MEM_SIZE)
621 end = DC8051_DATA_MEM_SIZE;
622 rval = read_8051_data(ppd->dd, start, end - start,
623 (u64 *)(tmp + start));
624 if (rval)
625 goto done;
626 }
627
628 rval = simple_read_from_buffer(buf, count, ppos, tmp,
629 DC8051_DATA_MEM_SIZE);
630done:
631 kfree(tmp);
632 return rval;
633}
634
635static ssize_t debugfs_lcb_read(struct file *file, char __user *buf,
636 size_t count, loff_t *ppos)
637{
638 struct hfi1_pportdata *ppd = private2ppd(file);
639 struct hfi1_devdata *dd = ppd->dd;
640 unsigned long total, csr_off;
641 u64 data;
642
643 if (*ppos < 0)
644 return -EINVAL;
645 /* only read 8 byte quantities */
646 if ((count % 8) != 0)
647 return -EINVAL;
648 /* offset must be 8-byte aligned */
649 if ((*ppos % 8) != 0)
650 return -EINVAL;
651 /* do nothing if out of range or zero count */
652 if (*ppos >= (LCB_END - LCB_START) || !count)
653 return 0;
654 /* reduce count if needed */
655 if (*ppos + count > LCB_END - LCB_START)
656 count = (LCB_END - LCB_START) - *ppos;
657
658 csr_off = LCB_START + *ppos;
659 for (total = 0; total < count; total += 8, csr_off += 8) {
660 if (read_lcb_csr(dd, csr_off, (u64 *)&data))
661 break; /* failed */
662 if (put_user(data, (unsigned long __user *)(buf + total)))
663 break;
664 }
665 *ppos += total;
666 return total;
667}
668
669static ssize_t debugfs_lcb_write(struct file *file, const char __user *buf,
670 size_t count, loff_t *ppos)
671{
672 struct hfi1_pportdata *ppd = private2ppd(file);
673 struct hfi1_devdata *dd = ppd->dd;
674 unsigned long total, csr_off, data;
675
676 if (*ppos < 0)
677 return -EINVAL;
678 /* only write 8 byte quantities */
679 if ((count % 8) != 0)
680 return -EINVAL;
681 /* offset must be 8-byte aligned */
682 if ((*ppos % 8) != 0)
683 return -EINVAL;
684 /* do nothing if out of range or zero count */
685 if (*ppos >= (LCB_END - LCB_START) || !count)
686 return 0;
687 /* reduce count if needed */
688 if (*ppos + count > LCB_END - LCB_START)
689 count = (LCB_END - LCB_START) - *ppos;
690
691 csr_off = LCB_START + *ppos;
692 for (total = 0; total < count; total += 8, csr_off += 8) {
693 if (get_user(data, (unsigned long __user *)(buf + total)))
694 break;
695 if (write_lcb_csr(dd, csr_off, data))
696 break; /* failed */
697 }
698 *ppos += total;
699 return total;
700}
701
702/*
703 * read the per-port QSFP data for ppd
704 */
705static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf,
706 size_t count, loff_t *ppos)
707{
708 struct hfi1_pportdata *ppd;
709 char *tmp;
710 int ret;
711
712 ppd = private2ppd(file);
713 tmp = kmalloc(PAGE_SIZE, GFP_KERNEL);
714 if (!tmp)
715 return -ENOMEM;
716
717 ret = qsfp_dump(ppd, tmp, PAGE_SIZE);
718 if (ret > 0)
719 ret = simple_read_from_buffer(buf, count, ppos, tmp, ret);
720 kfree(tmp);
721 return ret;
722}
723
724/* Do an i2c write operation on the chain for the given HFI. */
725static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf,
726 size_t count, loff_t *ppos, u32 target)
727{
728 struct hfi1_pportdata *ppd;
729 char *buff;
730 int ret;
731 int i2c_addr;
732 int offset;
733 int total_written;
734
735 ppd = private2ppd(file);
736
737 /* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */
738 i2c_addr = (*ppos >> 16) & 0xffff;
739 offset = *ppos & 0xffff;
740
741 /* explicitly reject invalid address 0 to catch cp and cat */
742 if (i2c_addr == 0)
743 return -EINVAL;
744
745 buff = memdup_user(buf, count);
746 if (IS_ERR(buff))
747 return PTR_ERR(buff);
748
749 total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count);
750 if (total_written < 0) {
751 ret = total_written;
752 goto _free;
753 }
754
755 *ppos += total_written;
756
757 ret = total_written;
758
759 _free:
760 kfree(buff);
761 return ret;
762}
763
764/* Do an i2c write operation on chain for HFI 0. */
765static ssize_t i2c1_debugfs_write(struct file *file, const char __user *buf,
766 size_t count, loff_t *ppos)
767{
768 return __i2c_debugfs_write(file, buf, count, ppos, 0);
769}
770
771/* Do an i2c write operation on chain for HFI 1. */
772static ssize_t i2c2_debugfs_write(struct file *file, const char __user *buf,
773 size_t count, loff_t *ppos)
774{
775 return __i2c_debugfs_write(file, buf, count, ppos, 1);
776}
777
778/* Do an i2c read operation on the chain for the given HFI. */
779static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf,
780 size_t count, loff_t *ppos, u32 target)
781{
782 struct hfi1_pportdata *ppd;
783 char *buff;
784 int ret;
785 int i2c_addr;
786 int offset;
787 int total_read;
788
789 ppd = private2ppd(file);
790
791 /* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */
792 i2c_addr = (*ppos >> 16) & 0xffff;
793 offset = *ppos & 0xffff;
794
795 /* explicitly reject invalid address 0 to catch cp and cat */
796 if (i2c_addr == 0)
797 return -EINVAL;
798
799 buff = kmalloc(count, GFP_KERNEL);
800 if (!buff)
801 return -ENOMEM;
802
803 total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count);
804 if (total_read < 0) {
805 ret = total_read;
806 goto _free;
807 }
808
809 *ppos += total_read;
810
811 ret = copy_to_user(buf, buff, total_read);
812 if (ret > 0) {
813 ret = -EFAULT;
814 goto _free;
815 }
816
817 ret = total_read;
818
819 _free:
820 kfree(buff);
821 return ret;
822}
823
824/* Do an i2c read operation on chain for HFI 0. */
825static ssize_t i2c1_debugfs_read(struct file *file, char __user *buf,
826 size_t count, loff_t *ppos)
827{
828 return __i2c_debugfs_read(file, buf, count, ppos, 0);
829}
830
831/* Do an i2c read operation on chain for HFI 1. */
832static ssize_t i2c2_debugfs_read(struct file *file, char __user *buf,
833 size_t count, loff_t *ppos)
834{
835 return __i2c_debugfs_read(file, buf, count, ppos, 1);
836}
837
838/* Do a QSFP write operation on the i2c chain for the given HFI. */
839static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf,
840 size_t count, loff_t *ppos, u32 target)
841{
842 struct hfi1_pportdata *ppd;
843 char *buff;
844 int ret;
845 int total_written;
846
847 if (*ppos + count > QSFP_PAGESIZE * 4) /* base page + page00-page03 */
848 return -EINVAL;
849
850 ppd = private2ppd(file);
851
852 buff = memdup_user(buf, count);
853 if (IS_ERR(buff))
854 return PTR_ERR(buff);
855
856 total_written = qsfp_write(ppd, target, *ppos, buff, count);
857 if (total_written < 0) {
858 ret = total_written;
859 goto _free;
860 }
861
862 *ppos += total_written;
863
864 ret = total_written;
865
866 _free:
867 kfree(buff);
868 return ret;
869}
870
871/* Do a QSFP write operation on i2c chain for HFI 0. */
872static ssize_t qsfp1_debugfs_write(struct file *file, const char __user *buf,
873 size_t count, loff_t *ppos)
874{
875 return __qsfp_debugfs_write(file, buf, count, ppos, 0);
876}
877
878/* Do a QSFP write operation on i2c chain for HFI 1. */
879static ssize_t qsfp2_debugfs_write(struct file *file, const char __user *buf,
880 size_t count, loff_t *ppos)
881{
882 return __qsfp_debugfs_write(file, buf, count, ppos, 1);
883}
884
885/* Do a QSFP read operation on the i2c chain for the given HFI. */
886static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf,
887 size_t count, loff_t *ppos, u32 target)
888{
889 struct hfi1_pportdata *ppd;
890 char *buff;
891 int ret;
892 int total_read;
893
894 if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */
895 ret = -EINVAL;
896 goto _return;
897 }
898
899 ppd = private2ppd(file);
900
901 buff = kmalloc(count, GFP_KERNEL);
902 if (!buff) {
903 ret = -ENOMEM;
904 goto _return;
905 }
906
907 total_read = qsfp_read(ppd, target, *ppos, buff, count);
908 if (total_read < 0) {
909 ret = total_read;
910 goto _free;
911 }
912
913 *ppos += total_read;
914
915 ret = copy_to_user(buf, buff, total_read);
916 if (ret > 0) {
917 ret = -EFAULT;
918 goto _free;
919 }
920
921 ret = total_read;
922
923 _free:
924 kfree(buff);
925 _return:
926 return ret;
927}
928
929/* Do a QSFP read operation on i2c chain for HFI 0. */
930static ssize_t qsfp1_debugfs_read(struct file *file, char __user *buf,
931 size_t count, loff_t *ppos)
932{
933 return __qsfp_debugfs_read(file, buf, count, ppos, 0);
934}
935
936/* Do a QSFP read operation on i2c chain for HFI 1. */
937static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf,
938 size_t count, loff_t *ppos)
939{
940 return __qsfp_debugfs_read(file, buf, count, ppos, 1);
941}
942
943static int __i2c_debugfs_open(struct inode *in, struct file *fp, u32 target)
944{
945 struct hfi1_pportdata *ppd;
946
947 ppd = private2ppd(fp);
948
949 return acquire_chip_resource(ppd->dd, i2c_target(target), 0);
950}
951
952static int i2c1_debugfs_open(struct inode *in, struct file *fp)
953{
954 return __i2c_debugfs_open(in, fp, 0);
955}
956
957static int i2c2_debugfs_open(struct inode *in, struct file *fp)
958{
959 return __i2c_debugfs_open(in, fp, 1);
960}
961
962static int __i2c_debugfs_release(struct inode *in, struct file *fp, u32 target)
963{
964 struct hfi1_pportdata *ppd;
965
966 ppd = private2ppd(fp);
967
968 release_chip_resource(ppd->dd, i2c_target(target));
969
970 return 0;
971}
972
973static int i2c1_debugfs_release(struct inode *in, struct file *fp)
974{
975 return __i2c_debugfs_release(in, fp, 0);
976}
977
978static int i2c2_debugfs_release(struct inode *in, struct file *fp)
979{
980 return __i2c_debugfs_release(in, fp, 1);
981}
982
983static int __qsfp_debugfs_open(struct inode *in, struct file *fp, u32 target)
984{
985 struct hfi1_pportdata *ppd;
986
987 ppd = private2ppd(fp);
988
989 return acquire_chip_resource(ppd->dd, i2c_target(target), 0);
990}
991
992static int qsfp1_debugfs_open(struct inode *in, struct file *fp)
993{
994 return __qsfp_debugfs_open(in, fp, 0);
995}
996
997static int qsfp2_debugfs_open(struct inode *in, struct file *fp)
998{
999 return __qsfp_debugfs_open(in, fp, 1);
1000}
1001
1002static int __qsfp_debugfs_release(struct inode *in, struct file *fp, u32 target)
1003{
1004 struct hfi1_pportdata *ppd;
1005
1006 ppd = private2ppd(fp);
1007
1008 release_chip_resource(ppd->dd, i2c_target(target));
1009
1010 return 0;
1011}
1012
1013static int qsfp1_debugfs_release(struct inode *in, struct file *fp)
1014{
1015 return __qsfp_debugfs_release(in, fp, 0);
1016}
1017
1018static int qsfp2_debugfs_release(struct inode *in, struct file *fp)
1019{
1020 return __qsfp_debugfs_release(in, fp, 1);
1021}
1022
1023#define EXPROM_WRITE_ENABLE BIT_ULL(14)
1024
1025static bool exprom_wp_disabled;
1026
1027static int exprom_wp_set(struct hfi1_devdata *dd, bool disable)
1028{
1029 u64 gpio_val = 0;
1030
1031 if (disable) {
1032 gpio_val = EXPROM_WRITE_ENABLE;
1033 exprom_wp_disabled = true;
1034 dd_dev_info(dd, "Disable Expansion ROM Write Protection\n");
1035 } else {
1036 exprom_wp_disabled = false;
1037 dd_dev_info(dd, "Enable Expansion ROM Write Protection\n");
1038 }
1039
1040 write_csr(dd, ASIC_GPIO_OUT, gpio_val);
1041 write_csr(dd, ASIC_GPIO_OE, gpio_val);
1042
1043 return 0;
1044}
1045
1046static ssize_t exprom_wp_debugfs_read(struct file *file, char __user *buf,
1047 size_t count, loff_t *ppos)
1048{
1049 return 0;
1050}
1051
1052static ssize_t exprom_wp_debugfs_write(struct file *file,
1053 const char __user *buf, size_t count,
1054 loff_t *ppos)
1055{
1056 struct hfi1_pportdata *ppd = private2ppd(file);
1057 char cdata;
1058
1059 if (count != 1)
1060 return -EINVAL;
1061 if (get_user(cdata, buf))
1062 return -EFAULT;
1063 if (cdata == '0')
1064 exprom_wp_set(ppd->dd, false);
1065 else if (cdata == '1')
1066 exprom_wp_set(ppd->dd, true);
1067 else
1068 return -EINVAL;
1069
1070 return 1;
1071}
1072
1073static unsigned long exprom_in_use;
1074
1075static int exprom_wp_debugfs_open(struct inode *in, struct file *fp)
1076{
1077 if (test_and_set_bit(0, &exprom_in_use))
1078 return -EBUSY;
1079
1080 return 0;
1081}
1082
1083static int exprom_wp_debugfs_release(struct inode *in, struct file *fp)
1084{
1085 struct hfi1_pportdata *ppd = private2ppd(fp);
1086
1087 if (exprom_wp_disabled)
1088 exprom_wp_set(ppd->dd, false);
1089 clear_bit(0, &exprom_in_use);
1090
1091 return 0;
1092}
1093
1094#define DEBUGFS_OPS(nm, readroutine, writeroutine) \
1095{ \
1096 .name = nm, \
1097 .ops = { \
1098 .owner = THIS_MODULE, \
1099 .read = readroutine, \
1100 .write = writeroutine, \
1101 .llseek = generic_file_llseek, \
1102 }, \
1103}
1104
1105#define DEBUGFS_XOPS(nm, readf, writef, openf, releasef) \
1106{ \
1107 .name = nm, \
1108 .ops = { \
1109 .owner = THIS_MODULE, \
1110 .read = readf, \
1111 .write = writef, \
1112 .llseek = generic_file_llseek, \
1113 .open = openf, \
1114 .release = releasef \
1115 }, \
1116}
1117
1118static const struct counter_info cntr_ops[] = {
1119 DEBUGFS_OPS("counter_names", dev_names_read, NULL),
1120 DEBUGFS_OPS("counters", dev_counters_read, NULL),
1121 DEBUGFS_OPS("portcounter_names", portnames_read, NULL),
1122};
1123
1124static const struct counter_info port_cntr_ops[] = {
1125 DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL),
1126 DEBUGFS_XOPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write,
1127 i2c1_debugfs_open, i2c1_debugfs_release),
1128 DEBUGFS_XOPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write,
1129 i2c2_debugfs_open, i2c2_debugfs_release),
1130 DEBUGFS_OPS("qsfp_dump%d", qsfp_debugfs_dump, NULL),
1131 DEBUGFS_XOPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write,
1132 qsfp1_debugfs_open, qsfp1_debugfs_release),
1133 DEBUGFS_XOPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write,
1134 qsfp2_debugfs_open, qsfp2_debugfs_release),
1135 DEBUGFS_XOPS("exprom_wp", exprom_wp_debugfs_read,
1136 exprom_wp_debugfs_write, exprom_wp_debugfs_open,
1137 exprom_wp_debugfs_release),
1138 DEBUGFS_OPS("asic_flags", asic_flags_read, asic_flags_write),
1139 DEBUGFS_OPS("dc8051_memory", dc8051_memory_read, NULL),
1140 DEBUGFS_OPS("lcb", debugfs_lcb_read, debugfs_lcb_write),
1141};
1142
1143static void *_sdma_cpu_list_seq_start(struct seq_file *s, loff_t *pos)
1144{
1145 if (*pos >= num_online_cpus())
1146 return NULL;
1147
1148 return pos;
1149}
1150
1151static void *_sdma_cpu_list_seq_next(struct seq_file *s, void *v, loff_t *pos)
1152{
1153 ++*pos;
1154 if (*pos >= num_online_cpus())
1155 return NULL;
1156
1157 return pos;
1158}
1159
1160static void _sdma_cpu_list_seq_stop(struct seq_file *s, void *v)
1161{
1162 /* nothing allocated */
1163}
1164
1165static int _sdma_cpu_list_seq_show(struct seq_file *s, void *v)
1166{
1167 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
1168 struct hfi1_devdata *dd = dd_from_dev(ibd);
1169 loff_t *spos = v;
1170 loff_t i = *spos;
1171
1172 sdma_seqfile_dump_cpu_list(s, dd, (unsigned long)i);
1173 return 0;
1174}
1175
1176DEBUGFS_SEQ_FILE_OPS(sdma_cpu_list);
1177DEBUGFS_SEQ_FILE_OPEN(sdma_cpu_list)
1178DEBUGFS_FILE_OPS(sdma_cpu_list);
1179
1180void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd)
1181{
1182 char name[sizeof("port0counters") + 1];
1183 char link[10];
1184 struct hfi1_devdata *dd = dd_from_dev(ibd);
1185 struct hfi1_pportdata *ppd;
1186 struct dentry *root;
1187 int unit = dd->unit;
1188 int i, j;
1189
1190 if (!hfi1_dbg_root)
1191 return;
1192 snprintf(name, sizeof(name), "%s_%d", class_name(), unit);
1193 snprintf(link, sizeof(link), "%d", unit);
1194 root = debugfs_create_dir(name, hfi1_dbg_root);
1195 ibd->hfi1_ibdev_dbg = root;
1196
1197 ibd->hfi1_ibdev_link =
1198 debugfs_create_symlink(link, hfi1_dbg_root, name);
1199
1200 debugfs_create_file("opcode_stats", 0444, root, ibd,
1201 &_opcode_stats_file_ops);
1202 debugfs_create_file("tx_opcode_stats", 0444, root, ibd,
1203 &_tx_opcode_stats_file_ops);
1204 debugfs_create_file("ctx_stats", 0444, root, ibd, &_ctx_stats_file_ops);
1205 debugfs_create_file("qp_stats", 0444, root, ibd, &_qp_stats_file_ops);
1206 debugfs_create_file("sdes", 0444, root, ibd, &_sdes_file_ops);
1207 debugfs_create_file("rcds", 0444, root, ibd, &_rcds_file_ops);
1208 debugfs_create_file("pios", 0444, root, ibd, &_pios_file_ops);
1209 debugfs_create_file("sdma_cpu_list", 0444, root, ibd,
1210 &_sdma_cpu_list_file_ops);
1211
1212 /* dev counter files */
1213 for (i = 0; i < ARRAY_SIZE(cntr_ops); i++)
1214 debugfs_create_file(cntr_ops[i].name, 0444, root, dd,
1215 &cntr_ops[i].ops);
1216
1217 /* per port files */
1218 for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++)
1219 for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) {
1220 snprintf(name,
1221 sizeof(name),
1222 port_cntr_ops[i].name,
1223 j + 1);
1224 debugfs_create_file(name,
1225 !port_cntr_ops[i].ops.write ?
1226 S_IRUGO :
1227 S_IRUGO | S_IWUSR,
1228 root, ppd, &port_cntr_ops[i].ops);
1229 }
1230
1231 hfi1_fault_init_debugfs(ibd);
1232}
1233
1234void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd)
1235{
1236 if (!hfi1_dbg_root)
1237 goto out;
1238 hfi1_fault_exit_debugfs(ibd);
1239 debugfs_remove(ibd->hfi1_ibdev_link);
1240 debugfs_remove_recursive(ibd->hfi1_ibdev_dbg);
1241out:
1242 ibd->hfi1_ibdev_dbg = NULL;
1243}
1244
1245/*
1246 * driver stats field names, one line per stat, single string. Used by
1247 * programs like hfistats to print the stats in a way which works for
1248 * different versions of drivers, without changing program source.
1249 * if hfi1_ib_stats changes, this needs to change. Names need to be
1250 * 12 chars or less (w/o newline), for proper display by hfistats utility.
1251 */
1252static const char * const hfi1_statnames[] = {
1253 /* must be element 0*/
1254 "KernIntr",
1255 "ErrorIntr",
1256 "Tx_Errs",
1257 "Rcv_Errs",
1258 "H/W_Errs",
1259 "NoPIOBufs",
1260 "CtxtsOpen",
1261 "RcvLen_Errs",
1262 "EgrBufFull",
1263 "EgrHdrFull"
1264};
1265
1266static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos)
1267{
1268 if (*pos >= ARRAY_SIZE(hfi1_statnames))
1269 return NULL;
1270 return pos;
1271}
1272
1273static void *_driver_stats_names_seq_next(
1274 struct seq_file *s,
1275 void *v,
1276 loff_t *pos)
1277{
1278 ++*pos;
1279 if (*pos >= ARRAY_SIZE(hfi1_statnames))
1280 return NULL;
1281 return pos;
1282}
1283
1284static void _driver_stats_names_seq_stop(struct seq_file *s, void *v)
1285{
1286}
1287
1288static int _driver_stats_names_seq_show(struct seq_file *s, void *v)
1289{
1290 loff_t *spos = v;
1291
1292 seq_printf(s, "%s\n", hfi1_statnames[*spos]);
1293 return 0;
1294}
1295
1296DEBUGFS_SEQ_FILE_OPS(driver_stats_names);
1297DEBUGFS_SEQ_FILE_OPEN(driver_stats_names)
1298DEBUGFS_FILE_OPS(driver_stats_names);
1299
1300static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos)
1301{
1302 if (*pos >= ARRAY_SIZE(hfi1_statnames))
1303 return NULL;
1304 return pos;
1305}
1306
1307static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
1308{
1309 ++*pos;
1310 if (*pos >= ARRAY_SIZE(hfi1_statnames))
1311 return NULL;
1312 return pos;
1313}
1314
1315static void _driver_stats_seq_stop(struct seq_file *s, void *v)
1316{
1317}
1318
1319static void hfi1_sps_show_ints(struct seq_file *s)
1320{
1321 unsigned long index, flags;
1322 struct hfi1_devdata *dd;
1323 u64 sps_ints = 0;
1324
1325 xa_lock_irqsave(&hfi1_dev_table, flags);
1326 xa_for_each(&hfi1_dev_table, index, dd) {
1327 sps_ints += get_all_cpu_total(dd->int_counter);
1328 }
1329 xa_unlock_irqrestore(&hfi1_dev_table, flags);
1330 seq_write(s, &sps_ints, sizeof(u64));
1331}
1332
1333static int _driver_stats_seq_show(struct seq_file *s, void *v)
1334{
1335 loff_t *spos = v;
1336 u64 *stats = (u64 *)&hfi1_stats;
1337
1338 /* special case for interrupts */
1339 if (*spos == 0)
1340 hfi1_sps_show_ints(s);
1341 else
1342 seq_write(s, stats + *spos, sizeof(u64));
1343 return 0;
1344}
1345
1346DEBUGFS_SEQ_FILE_OPS(driver_stats);
1347DEBUGFS_SEQ_FILE_OPEN(driver_stats)
1348DEBUGFS_FILE_OPS(driver_stats);
1349
1350void hfi1_dbg_init(void)
1351{
1352 hfi1_dbg_root = debugfs_create_dir(DRIVER_NAME, NULL);
1353 debugfs_create_file("driver_stats_names", 0444, hfi1_dbg_root, NULL,
1354 &_driver_stats_names_file_ops);
1355 debugfs_create_file("driver_stats", 0444, hfi1_dbg_root, NULL,
1356 &_driver_stats_file_ops);
1357}
1358
1359void hfi1_dbg_exit(void)
1360{
1361 debugfs_remove_recursive(hfi1_dbg_root);
1362 hfi1_dbg_root = NULL;
1363}
1/*
2 * Copyright(c) 2015-2018 Intel Corporation.
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 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * BSD LICENSE
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 *
24 * - Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * - Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in
28 * the documentation and/or other materials provided with the
29 * distribution.
30 * - Neither the name of Intel Corporation nor the names of its
31 * contributors may be used to endorse or promote products derived
32 * from this software without specific prior written permission.
33 *
34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 *
46 */
47#include <linux/debugfs.h>
48#include <linux/seq_file.h>
49#include <linux/kernel.h>
50#include <linux/export.h>
51#include <linux/module.h>
52#include <linux/string.h>
53#include <linux/types.h>
54#include <linux/ratelimit.h>
55#include <linux/fault-inject.h>
56
57#include "hfi.h"
58#include "trace.h"
59#include "debugfs.h"
60#include "device.h"
61#include "qp.h"
62#include "sdma.h"
63
64static struct dentry *hfi1_dbg_root;
65
66/* wrappers to enforce srcu in seq file */
67static ssize_t hfi1_seq_read(
68 struct file *file,
69 char __user *buf,
70 size_t size,
71 loff_t *ppos)
72{
73 struct dentry *d = file->f_path.dentry;
74 ssize_t r;
75
76 r = debugfs_file_get(d);
77 if (unlikely(r))
78 return r;
79 r = seq_read(file, buf, size, ppos);
80 debugfs_file_put(d);
81 return r;
82}
83
84static loff_t hfi1_seq_lseek(
85 struct file *file,
86 loff_t offset,
87 int whence)
88{
89 struct dentry *d = file->f_path.dentry;
90 loff_t r;
91
92 r = debugfs_file_get(d);
93 if (unlikely(r))
94 return r;
95 r = seq_lseek(file, offset, whence);
96 debugfs_file_put(d);
97 return r;
98}
99
100#define private2dd(file) (file_inode(file)->i_private)
101#define private2ppd(file) (file_inode(file)->i_private)
102
103#define DEBUGFS_SEQ_FILE_OPS(name) \
104static const struct seq_operations _##name##_seq_ops = { \
105 .start = _##name##_seq_start, \
106 .next = _##name##_seq_next, \
107 .stop = _##name##_seq_stop, \
108 .show = _##name##_seq_show \
109}
110
111#define DEBUGFS_SEQ_FILE_OPEN(name) \
112static int _##name##_open(struct inode *inode, struct file *s) \
113{ \
114 struct seq_file *seq; \
115 int ret; \
116 ret = seq_open(s, &_##name##_seq_ops); \
117 if (ret) \
118 return ret; \
119 seq = s->private_data; \
120 seq->private = inode->i_private; \
121 return 0; \
122}
123
124#define DEBUGFS_FILE_OPS(name) \
125static const struct file_operations _##name##_file_ops = { \
126 .owner = THIS_MODULE, \
127 .open = _##name##_open, \
128 .read = hfi1_seq_read, \
129 .llseek = hfi1_seq_lseek, \
130 .release = seq_release \
131}
132
133#define DEBUGFS_FILE_CREATE(name, parent, data, ops, mode) \
134do { \
135 struct dentry *ent; \
136 ent = debugfs_create_file(name, mode, parent, \
137 data, ops); \
138 if (!ent) \
139 pr_warn("create of %s failed\n", name); \
140} while (0)
141
142#define DEBUGFS_SEQ_FILE_CREATE(name, parent, data) \
143 DEBUGFS_FILE_CREATE(#name, parent, data, &_##name##_file_ops, S_IRUGO)
144
145static void *_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
146{
147 struct hfi1_opcode_stats_perctx *opstats;
148
149 if (*pos >= ARRAY_SIZE(opstats->stats))
150 return NULL;
151 return pos;
152}
153
154static void *_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
155{
156 struct hfi1_opcode_stats_perctx *opstats;
157
158 ++*pos;
159 if (*pos >= ARRAY_SIZE(opstats->stats))
160 return NULL;
161 return pos;
162}
163
164static void _opcode_stats_seq_stop(struct seq_file *s, void *v)
165{
166}
167
168static int opcode_stats_show(struct seq_file *s, u8 i, u64 packets, u64 bytes)
169{
170 if (!packets && !bytes)
171 return SEQ_SKIP;
172 seq_printf(s, "%02x %llu/%llu\n", i,
173 (unsigned long long)packets,
174 (unsigned long long)bytes);
175
176 return 0;
177}
178
179static int _opcode_stats_seq_show(struct seq_file *s, void *v)
180{
181 loff_t *spos = v;
182 loff_t i = *spos, j;
183 u64 n_packets = 0, n_bytes = 0;
184 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
185 struct hfi1_devdata *dd = dd_from_dev(ibd);
186 struct hfi1_ctxtdata *rcd;
187
188 for (j = 0; j < dd->first_dyn_alloc_ctxt; j++) {
189 rcd = hfi1_rcd_get_by_index(dd, j);
190 if (rcd) {
191 n_packets += rcd->opstats->stats[i].n_packets;
192 n_bytes += rcd->opstats->stats[i].n_bytes;
193 }
194 hfi1_rcd_put(rcd);
195 }
196 return opcode_stats_show(s, i, n_packets, n_bytes);
197}
198
199DEBUGFS_SEQ_FILE_OPS(opcode_stats);
200DEBUGFS_SEQ_FILE_OPEN(opcode_stats)
201DEBUGFS_FILE_OPS(opcode_stats);
202
203static void *_tx_opcode_stats_seq_start(struct seq_file *s, loff_t *pos)
204{
205 return _opcode_stats_seq_start(s, pos);
206}
207
208static void *_tx_opcode_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
209{
210 return _opcode_stats_seq_next(s, v, pos);
211}
212
213static void _tx_opcode_stats_seq_stop(struct seq_file *s, void *v)
214{
215}
216
217static int _tx_opcode_stats_seq_show(struct seq_file *s, void *v)
218{
219 loff_t *spos = v;
220 loff_t i = *spos;
221 int j;
222 u64 n_packets = 0, n_bytes = 0;
223 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
224 struct hfi1_devdata *dd = dd_from_dev(ibd);
225
226 for_each_possible_cpu(j) {
227 struct hfi1_opcode_stats_perctx *s =
228 per_cpu_ptr(dd->tx_opstats, j);
229 n_packets += s->stats[i].n_packets;
230 n_bytes += s->stats[i].n_bytes;
231 }
232 return opcode_stats_show(s, i, n_packets, n_bytes);
233}
234
235DEBUGFS_SEQ_FILE_OPS(tx_opcode_stats);
236DEBUGFS_SEQ_FILE_OPEN(tx_opcode_stats)
237DEBUGFS_FILE_OPS(tx_opcode_stats);
238
239static void *_ctx_stats_seq_start(struct seq_file *s, loff_t *pos)
240{
241 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
242 struct hfi1_devdata *dd = dd_from_dev(ibd);
243
244 if (!*pos)
245 return SEQ_START_TOKEN;
246 if (*pos >= dd->first_dyn_alloc_ctxt)
247 return NULL;
248 return pos;
249}
250
251static void *_ctx_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
252{
253 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
254 struct hfi1_devdata *dd = dd_from_dev(ibd);
255
256 if (v == SEQ_START_TOKEN)
257 return pos;
258
259 ++*pos;
260 if (*pos >= dd->first_dyn_alloc_ctxt)
261 return NULL;
262 return pos;
263}
264
265static void _ctx_stats_seq_stop(struct seq_file *s, void *v)
266{
267 /* nothing allocated */
268}
269
270static int _ctx_stats_seq_show(struct seq_file *s, void *v)
271{
272 loff_t *spos;
273 loff_t i, j;
274 u64 n_packets = 0;
275 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
276 struct hfi1_devdata *dd = dd_from_dev(ibd);
277 struct hfi1_ctxtdata *rcd;
278
279 if (v == SEQ_START_TOKEN) {
280 seq_puts(s, "Ctx:npkts\n");
281 return 0;
282 }
283
284 spos = v;
285 i = *spos;
286
287 rcd = hfi1_rcd_get_by_index_safe(dd, i);
288 if (!rcd)
289 return SEQ_SKIP;
290
291 for (j = 0; j < ARRAY_SIZE(rcd->opstats->stats); j++)
292 n_packets += rcd->opstats->stats[j].n_packets;
293
294 hfi1_rcd_put(rcd);
295
296 if (!n_packets)
297 return SEQ_SKIP;
298
299 seq_printf(s, " %llu:%llu\n", i, n_packets);
300 return 0;
301}
302
303DEBUGFS_SEQ_FILE_OPS(ctx_stats);
304DEBUGFS_SEQ_FILE_OPEN(ctx_stats)
305DEBUGFS_FILE_OPS(ctx_stats);
306
307static void *_qp_stats_seq_start(struct seq_file *s, loff_t *pos)
308 __acquires(RCU)
309{
310 struct rvt_qp_iter *iter;
311 loff_t n = *pos;
312
313 iter = rvt_qp_iter_init(s->private, 0, NULL);
314
315 /* stop calls rcu_read_unlock */
316 rcu_read_lock();
317
318 if (!iter)
319 return NULL;
320
321 do {
322 if (rvt_qp_iter_next(iter)) {
323 kfree(iter);
324 return NULL;
325 }
326 } while (n--);
327
328 return iter;
329}
330
331static void *_qp_stats_seq_next(struct seq_file *s, void *iter_ptr,
332 loff_t *pos)
333 __must_hold(RCU)
334{
335 struct rvt_qp_iter *iter = iter_ptr;
336
337 (*pos)++;
338
339 if (rvt_qp_iter_next(iter)) {
340 kfree(iter);
341 return NULL;
342 }
343
344 return iter;
345}
346
347static void _qp_stats_seq_stop(struct seq_file *s, void *iter_ptr)
348 __releases(RCU)
349{
350 rcu_read_unlock();
351}
352
353static int _qp_stats_seq_show(struct seq_file *s, void *iter_ptr)
354{
355 struct rvt_qp_iter *iter = iter_ptr;
356
357 if (!iter)
358 return 0;
359
360 qp_iter_print(s, iter);
361
362 return 0;
363}
364
365DEBUGFS_SEQ_FILE_OPS(qp_stats);
366DEBUGFS_SEQ_FILE_OPEN(qp_stats)
367DEBUGFS_FILE_OPS(qp_stats);
368
369static void *_sdes_seq_start(struct seq_file *s, loff_t *pos)
370{
371 struct hfi1_ibdev *ibd;
372 struct hfi1_devdata *dd;
373
374 ibd = (struct hfi1_ibdev *)s->private;
375 dd = dd_from_dev(ibd);
376 if (!dd->per_sdma || *pos >= dd->num_sdma)
377 return NULL;
378 return pos;
379}
380
381static void *_sdes_seq_next(struct seq_file *s, void *v, loff_t *pos)
382{
383 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
384 struct hfi1_devdata *dd = dd_from_dev(ibd);
385
386 ++*pos;
387 if (!dd->per_sdma || *pos >= dd->num_sdma)
388 return NULL;
389 return pos;
390}
391
392static void _sdes_seq_stop(struct seq_file *s, void *v)
393{
394}
395
396static int _sdes_seq_show(struct seq_file *s, void *v)
397{
398 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
399 struct hfi1_devdata *dd = dd_from_dev(ibd);
400 loff_t *spos = v;
401 loff_t i = *spos;
402
403 sdma_seqfile_dump_sde(s, &dd->per_sdma[i]);
404 return 0;
405}
406
407DEBUGFS_SEQ_FILE_OPS(sdes);
408DEBUGFS_SEQ_FILE_OPEN(sdes)
409DEBUGFS_FILE_OPS(sdes);
410
411static void *_rcds_seq_start(struct seq_file *s, loff_t *pos)
412{
413 struct hfi1_ibdev *ibd;
414 struct hfi1_devdata *dd;
415
416 ibd = (struct hfi1_ibdev *)s->private;
417 dd = dd_from_dev(ibd);
418 if (!dd->rcd || *pos >= dd->n_krcv_queues)
419 return NULL;
420 return pos;
421}
422
423static void *_rcds_seq_next(struct seq_file *s, void *v, loff_t *pos)
424{
425 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
426 struct hfi1_devdata *dd = dd_from_dev(ibd);
427
428 ++*pos;
429 if (!dd->rcd || *pos >= dd->n_krcv_queues)
430 return NULL;
431 return pos;
432}
433
434static void _rcds_seq_stop(struct seq_file *s, void *v)
435{
436}
437
438static int _rcds_seq_show(struct seq_file *s, void *v)
439{
440 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
441 struct hfi1_devdata *dd = dd_from_dev(ibd);
442 struct hfi1_ctxtdata *rcd;
443 loff_t *spos = v;
444 loff_t i = *spos;
445
446 rcd = hfi1_rcd_get_by_index_safe(dd, i);
447 if (rcd)
448 seqfile_dump_rcd(s, rcd);
449 hfi1_rcd_put(rcd);
450 return 0;
451}
452
453DEBUGFS_SEQ_FILE_OPS(rcds);
454DEBUGFS_SEQ_FILE_OPEN(rcds)
455DEBUGFS_FILE_OPS(rcds);
456
457/* read the per-device counters */
458static ssize_t dev_counters_read(struct file *file, char __user *buf,
459 size_t count, loff_t *ppos)
460{
461 u64 *counters;
462 size_t avail;
463 struct hfi1_devdata *dd;
464 ssize_t rval;
465
466 dd = private2dd(file);
467 avail = hfi1_read_cntrs(dd, NULL, &counters);
468 rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
469 return rval;
470}
471
472/* read the per-device counters */
473static ssize_t dev_names_read(struct file *file, char __user *buf,
474 size_t count, loff_t *ppos)
475{
476 char *names;
477 size_t avail;
478 struct hfi1_devdata *dd;
479 ssize_t rval;
480
481 dd = private2dd(file);
482 avail = hfi1_read_cntrs(dd, &names, NULL);
483 rval = simple_read_from_buffer(buf, count, ppos, names, avail);
484 return rval;
485}
486
487struct counter_info {
488 char *name;
489 const struct file_operations ops;
490};
491
492/*
493 * Could use file_inode(file)->i_ino to figure out which file,
494 * instead of separate routine for each, but for now, this works...
495 */
496
497/* read the per-port names (same for each port) */
498static ssize_t portnames_read(struct file *file, char __user *buf,
499 size_t count, loff_t *ppos)
500{
501 char *names;
502 size_t avail;
503 struct hfi1_devdata *dd;
504 ssize_t rval;
505
506 dd = private2dd(file);
507 avail = hfi1_read_portcntrs(dd->pport, &names, NULL);
508 rval = simple_read_from_buffer(buf, count, ppos, names, avail);
509 return rval;
510}
511
512/* read the per-port counters */
513static ssize_t portcntrs_debugfs_read(struct file *file, char __user *buf,
514 size_t count, loff_t *ppos)
515{
516 u64 *counters;
517 size_t avail;
518 struct hfi1_pportdata *ppd;
519 ssize_t rval;
520
521 ppd = private2ppd(file);
522 avail = hfi1_read_portcntrs(ppd, NULL, &counters);
523 rval = simple_read_from_buffer(buf, count, ppos, counters, avail);
524 return rval;
525}
526
527static void check_dyn_flag(u64 scratch0, char *p, int size, int *used,
528 int this_hfi, int hfi, u32 flag, const char *what)
529{
530 u32 mask;
531
532 mask = flag << (hfi ? CR_DYN_SHIFT : 0);
533 if (scratch0 & mask) {
534 *used += scnprintf(p + *used, size - *used,
535 " 0x%08x - HFI%d %s in use, %s device\n",
536 mask, hfi, what,
537 this_hfi == hfi ? "this" : "other");
538 }
539}
540
541static ssize_t asic_flags_read(struct file *file, char __user *buf,
542 size_t count, loff_t *ppos)
543{
544 struct hfi1_pportdata *ppd;
545 struct hfi1_devdata *dd;
546 u64 scratch0;
547 char *tmp;
548 int ret = 0;
549 int size;
550 int used;
551 int i;
552
553 ppd = private2ppd(file);
554 dd = ppd->dd;
555 size = PAGE_SIZE;
556 used = 0;
557 tmp = kmalloc(size, GFP_KERNEL);
558 if (!tmp)
559 return -ENOMEM;
560
561 scratch0 = read_csr(dd, ASIC_CFG_SCRATCH);
562 used += scnprintf(tmp + used, size - used,
563 "Resource flags: 0x%016llx\n", scratch0);
564
565 /* check permanent flag */
566 if (scratch0 & CR_THERM_INIT) {
567 used += scnprintf(tmp + used, size - used,
568 " 0x%08x - thermal monitoring initialized\n",
569 (u32)CR_THERM_INIT);
570 }
571
572 /* check each dynamic flag on each HFI */
573 for (i = 0; i < 2; i++) {
574 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
575 CR_SBUS, "SBus");
576 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
577 CR_EPROM, "EPROM");
578 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
579 CR_I2C1, "i2c chain 1");
580 check_dyn_flag(scratch0, tmp, size, &used, dd->hfi1_id, i,
581 CR_I2C2, "i2c chain 2");
582 }
583 used += scnprintf(tmp + used, size - used, "Write bits to clear\n");
584
585 ret = simple_read_from_buffer(buf, count, ppos, tmp, used);
586 kfree(tmp);
587 return ret;
588}
589
590static ssize_t asic_flags_write(struct file *file, const char __user *buf,
591 size_t count, loff_t *ppos)
592{
593 struct hfi1_pportdata *ppd;
594 struct hfi1_devdata *dd;
595 char *buff;
596 int ret;
597 unsigned long long value;
598 u64 scratch0;
599 u64 clear;
600
601 ppd = private2ppd(file);
602 dd = ppd->dd;
603
604 /* zero terminate and read the expected integer */
605 buff = memdup_user_nul(buf, count);
606 if (IS_ERR(buff))
607 return PTR_ERR(buff);
608
609 ret = kstrtoull(buff, 0, &value);
610 if (ret)
611 goto do_free;
612 clear = value;
613
614 /* obtain exclusive access */
615 mutex_lock(&dd->asic_data->asic_resource_mutex);
616 acquire_hw_mutex(dd);
617
618 scratch0 = read_csr(dd, ASIC_CFG_SCRATCH);
619 scratch0 &= ~clear;
620 write_csr(dd, ASIC_CFG_SCRATCH, scratch0);
621 /* force write to be visible to other HFI on another OS */
622 (void)read_csr(dd, ASIC_CFG_SCRATCH);
623
624 release_hw_mutex(dd);
625 mutex_unlock(&dd->asic_data->asic_resource_mutex);
626
627 /* return the number of bytes written */
628 ret = count;
629
630 do_free:
631 kfree(buff);
632 return ret;
633}
634
635/* read the dc8051 memory */
636static ssize_t dc8051_memory_read(struct file *file, char __user *buf,
637 size_t count, loff_t *ppos)
638{
639 struct hfi1_pportdata *ppd = private2ppd(file);
640 ssize_t rval;
641 void *tmp;
642 loff_t start, end;
643
644 /* the checks below expect the position to be positive */
645 if (*ppos < 0)
646 return -EINVAL;
647
648 tmp = kzalloc(DC8051_DATA_MEM_SIZE, GFP_KERNEL);
649 if (!tmp)
650 return -ENOMEM;
651
652 /*
653 * Fill in the requested portion of the temporary buffer from the
654 * 8051 memory. The 8051 memory read is done in terms of 8 bytes.
655 * Adjust start and end to fit. Skip reading anything if out of
656 * range.
657 */
658 start = *ppos & ~0x7; /* round down */
659 if (start < DC8051_DATA_MEM_SIZE) {
660 end = (*ppos + count + 7) & ~0x7; /* round up */
661 if (end > DC8051_DATA_MEM_SIZE)
662 end = DC8051_DATA_MEM_SIZE;
663 rval = read_8051_data(ppd->dd, start, end - start,
664 (u64 *)(tmp + start));
665 if (rval)
666 goto done;
667 }
668
669 rval = simple_read_from_buffer(buf, count, ppos, tmp,
670 DC8051_DATA_MEM_SIZE);
671done:
672 kfree(tmp);
673 return rval;
674}
675
676static ssize_t debugfs_lcb_read(struct file *file, char __user *buf,
677 size_t count, loff_t *ppos)
678{
679 struct hfi1_pportdata *ppd = private2ppd(file);
680 struct hfi1_devdata *dd = ppd->dd;
681 unsigned long total, csr_off;
682 u64 data;
683
684 if (*ppos < 0)
685 return -EINVAL;
686 /* only read 8 byte quantities */
687 if ((count % 8) != 0)
688 return -EINVAL;
689 /* offset must be 8-byte aligned */
690 if ((*ppos % 8) != 0)
691 return -EINVAL;
692 /* do nothing if out of range or zero count */
693 if (*ppos >= (LCB_END - LCB_START) || !count)
694 return 0;
695 /* reduce count if needed */
696 if (*ppos + count > LCB_END - LCB_START)
697 count = (LCB_END - LCB_START) - *ppos;
698
699 csr_off = LCB_START + *ppos;
700 for (total = 0; total < count; total += 8, csr_off += 8) {
701 if (read_lcb_csr(dd, csr_off, (u64 *)&data))
702 break; /* failed */
703 if (put_user(data, (unsigned long __user *)(buf + total)))
704 break;
705 }
706 *ppos += total;
707 return total;
708}
709
710static ssize_t debugfs_lcb_write(struct file *file, const char __user *buf,
711 size_t count, loff_t *ppos)
712{
713 struct hfi1_pportdata *ppd = private2ppd(file);
714 struct hfi1_devdata *dd = ppd->dd;
715 unsigned long total, csr_off, data;
716
717 if (*ppos < 0)
718 return -EINVAL;
719 /* only write 8 byte quantities */
720 if ((count % 8) != 0)
721 return -EINVAL;
722 /* offset must be 8-byte aligned */
723 if ((*ppos % 8) != 0)
724 return -EINVAL;
725 /* do nothing if out of range or zero count */
726 if (*ppos >= (LCB_END - LCB_START) || !count)
727 return 0;
728 /* reduce count if needed */
729 if (*ppos + count > LCB_END - LCB_START)
730 count = (LCB_END - LCB_START) - *ppos;
731
732 csr_off = LCB_START + *ppos;
733 for (total = 0; total < count; total += 8, csr_off += 8) {
734 if (get_user(data, (unsigned long __user *)(buf + total)))
735 break;
736 if (write_lcb_csr(dd, csr_off, data))
737 break; /* failed */
738 }
739 *ppos += total;
740 return total;
741}
742
743/*
744 * read the per-port QSFP data for ppd
745 */
746static ssize_t qsfp_debugfs_dump(struct file *file, char __user *buf,
747 size_t count, loff_t *ppos)
748{
749 struct hfi1_pportdata *ppd;
750 char *tmp;
751 int ret;
752
753 ppd = private2ppd(file);
754 tmp = kmalloc(PAGE_SIZE, GFP_KERNEL);
755 if (!tmp)
756 return -ENOMEM;
757
758 ret = qsfp_dump(ppd, tmp, PAGE_SIZE);
759 if (ret > 0)
760 ret = simple_read_from_buffer(buf, count, ppos, tmp, ret);
761 kfree(tmp);
762 return ret;
763}
764
765/* Do an i2c write operation on the chain for the given HFI. */
766static ssize_t __i2c_debugfs_write(struct file *file, const char __user *buf,
767 size_t count, loff_t *ppos, u32 target)
768{
769 struct hfi1_pportdata *ppd;
770 char *buff;
771 int ret;
772 int i2c_addr;
773 int offset;
774 int total_written;
775
776 ppd = private2ppd(file);
777
778 /* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */
779 i2c_addr = (*ppos >> 16) & 0xffff;
780 offset = *ppos & 0xffff;
781
782 /* explicitly reject invalid address 0 to catch cp and cat */
783 if (i2c_addr == 0)
784 return -EINVAL;
785
786 buff = memdup_user(buf, count);
787 if (IS_ERR(buff))
788 return PTR_ERR(buff);
789
790 total_written = i2c_write(ppd, target, i2c_addr, offset, buff, count);
791 if (total_written < 0) {
792 ret = total_written;
793 goto _free;
794 }
795
796 *ppos += total_written;
797
798 ret = total_written;
799
800 _free:
801 kfree(buff);
802 return ret;
803}
804
805/* Do an i2c write operation on chain for HFI 0. */
806static ssize_t i2c1_debugfs_write(struct file *file, const char __user *buf,
807 size_t count, loff_t *ppos)
808{
809 return __i2c_debugfs_write(file, buf, count, ppos, 0);
810}
811
812/* Do an i2c write operation on chain for HFI 1. */
813static ssize_t i2c2_debugfs_write(struct file *file, const char __user *buf,
814 size_t count, loff_t *ppos)
815{
816 return __i2c_debugfs_write(file, buf, count, ppos, 1);
817}
818
819/* Do an i2c read operation on the chain for the given HFI. */
820static ssize_t __i2c_debugfs_read(struct file *file, char __user *buf,
821 size_t count, loff_t *ppos, u32 target)
822{
823 struct hfi1_pportdata *ppd;
824 char *buff;
825 int ret;
826 int i2c_addr;
827 int offset;
828 int total_read;
829
830 ppd = private2ppd(file);
831
832 /* byte offset format: [offsetSize][i2cAddr][offsetHigh][offsetLow] */
833 i2c_addr = (*ppos >> 16) & 0xffff;
834 offset = *ppos & 0xffff;
835
836 /* explicitly reject invalid address 0 to catch cp and cat */
837 if (i2c_addr == 0)
838 return -EINVAL;
839
840 buff = kmalloc(count, GFP_KERNEL);
841 if (!buff)
842 return -ENOMEM;
843
844 total_read = i2c_read(ppd, target, i2c_addr, offset, buff, count);
845 if (total_read < 0) {
846 ret = total_read;
847 goto _free;
848 }
849
850 *ppos += total_read;
851
852 ret = copy_to_user(buf, buff, total_read);
853 if (ret > 0) {
854 ret = -EFAULT;
855 goto _free;
856 }
857
858 ret = total_read;
859
860 _free:
861 kfree(buff);
862 return ret;
863}
864
865/* Do an i2c read operation on chain for HFI 0. */
866static ssize_t i2c1_debugfs_read(struct file *file, char __user *buf,
867 size_t count, loff_t *ppos)
868{
869 return __i2c_debugfs_read(file, buf, count, ppos, 0);
870}
871
872/* Do an i2c read operation on chain for HFI 1. */
873static ssize_t i2c2_debugfs_read(struct file *file, char __user *buf,
874 size_t count, loff_t *ppos)
875{
876 return __i2c_debugfs_read(file, buf, count, ppos, 1);
877}
878
879/* Do a QSFP write operation on the i2c chain for the given HFI. */
880static ssize_t __qsfp_debugfs_write(struct file *file, const char __user *buf,
881 size_t count, loff_t *ppos, u32 target)
882{
883 struct hfi1_pportdata *ppd;
884 char *buff;
885 int ret;
886 int total_written;
887
888 if (*ppos + count > QSFP_PAGESIZE * 4) /* base page + page00-page03 */
889 return -EINVAL;
890
891 ppd = private2ppd(file);
892
893 buff = memdup_user(buf, count);
894 if (IS_ERR(buff))
895 return PTR_ERR(buff);
896
897 total_written = qsfp_write(ppd, target, *ppos, buff, count);
898 if (total_written < 0) {
899 ret = total_written;
900 goto _free;
901 }
902
903 *ppos += total_written;
904
905 ret = total_written;
906
907 _free:
908 kfree(buff);
909 return ret;
910}
911
912/* Do a QSFP write operation on i2c chain for HFI 0. */
913static ssize_t qsfp1_debugfs_write(struct file *file, const char __user *buf,
914 size_t count, loff_t *ppos)
915{
916 return __qsfp_debugfs_write(file, buf, count, ppos, 0);
917}
918
919/* Do a QSFP write operation on i2c chain for HFI 1. */
920static ssize_t qsfp2_debugfs_write(struct file *file, const char __user *buf,
921 size_t count, loff_t *ppos)
922{
923 return __qsfp_debugfs_write(file, buf, count, ppos, 1);
924}
925
926/* Do a QSFP read operation on the i2c chain for the given HFI. */
927static ssize_t __qsfp_debugfs_read(struct file *file, char __user *buf,
928 size_t count, loff_t *ppos, u32 target)
929{
930 struct hfi1_pportdata *ppd;
931 char *buff;
932 int ret;
933 int total_read;
934
935 if (*ppos + count > QSFP_PAGESIZE * 4) { /* base page + page00-page03 */
936 ret = -EINVAL;
937 goto _return;
938 }
939
940 ppd = private2ppd(file);
941
942 buff = kmalloc(count, GFP_KERNEL);
943 if (!buff) {
944 ret = -ENOMEM;
945 goto _return;
946 }
947
948 total_read = qsfp_read(ppd, target, *ppos, buff, count);
949 if (total_read < 0) {
950 ret = total_read;
951 goto _free;
952 }
953
954 *ppos += total_read;
955
956 ret = copy_to_user(buf, buff, total_read);
957 if (ret > 0) {
958 ret = -EFAULT;
959 goto _free;
960 }
961
962 ret = total_read;
963
964 _free:
965 kfree(buff);
966 _return:
967 return ret;
968}
969
970/* Do a QSFP read operation on i2c chain for HFI 0. */
971static ssize_t qsfp1_debugfs_read(struct file *file, char __user *buf,
972 size_t count, loff_t *ppos)
973{
974 return __qsfp_debugfs_read(file, buf, count, ppos, 0);
975}
976
977/* Do a QSFP read operation on i2c chain for HFI 1. */
978static ssize_t qsfp2_debugfs_read(struct file *file, char __user *buf,
979 size_t count, loff_t *ppos)
980{
981 return __qsfp_debugfs_read(file, buf, count, ppos, 1);
982}
983
984static int __i2c_debugfs_open(struct inode *in, struct file *fp, u32 target)
985{
986 struct hfi1_pportdata *ppd;
987 int ret;
988
989 if (!try_module_get(THIS_MODULE))
990 return -ENODEV;
991
992 ppd = private2ppd(fp);
993
994 ret = acquire_chip_resource(ppd->dd, i2c_target(target), 0);
995 if (ret) /* failed - release the module */
996 module_put(THIS_MODULE);
997
998 return ret;
999}
1000
1001static int i2c1_debugfs_open(struct inode *in, struct file *fp)
1002{
1003 return __i2c_debugfs_open(in, fp, 0);
1004}
1005
1006static int i2c2_debugfs_open(struct inode *in, struct file *fp)
1007{
1008 return __i2c_debugfs_open(in, fp, 1);
1009}
1010
1011static int __i2c_debugfs_release(struct inode *in, struct file *fp, u32 target)
1012{
1013 struct hfi1_pportdata *ppd;
1014
1015 ppd = private2ppd(fp);
1016
1017 release_chip_resource(ppd->dd, i2c_target(target));
1018 module_put(THIS_MODULE);
1019
1020 return 0;
1021}
1022
1023static int i2c1_debugfs_release(struct inode *in, struct file *fp)
1024{
1025 return __i2c_debugfs_release(in, fp, 0);
1026}
1027
1028static int i2c2_debugfs_release(struct inode *in, struct file *fp)
1029{
1030 return __i2c_debugfs_release(in, fp, 1);
1031}
1032
1033static int __qsfp_debugfs_open(struct inode *in, struct file *fp, u32 target)
1034{
1035 struct hfi1_pportdata *ppd;
1036 int ret;
1037
1038 if (!try_module_get(THIS_MODULE))
1039 return -ENODEV;
1040
1041 ppd = private2ppd(fp);
1042
1043 ret = acquire_chip_resource(ppd->dd, i2c_target(target), 0);
1044 if (ret) /* failed - release the module */
1045 module_put(THIS_MODULE);
1046
1047 return ret;
1048}
1049
1050static int qsfp1_debugfs_open(struct inode *in, struct file *fp)
1051{
1052 return __qsfp_debugfs_open(in, fp, 0);
1053}
1054
1055static int qsfp2_debugfs_open(struct inode *in, struct file *fp)
1056{
1057 return __qsfp_debugfs_open(in, fp, 1);
1058}
1059
1060static int __qsfp_debugfs_release(struct inode *in, struct file *fp, u32 target)
1061{
1062 struct hfi1_pportdata *ppd;
1063
1064 ppd = private2ppd(fp);
1065
1066 release_chip_resource(ppd->dd, i2c_target(target));
1067 module_put(THIS_MODULE);
1068
1069 return 0;
1070}
1071
1072static int qsfp1_debugfs_release(struct inode *in, struct file *fp)
1073{
1074 return __qsfp_debugfs_release(in, fp, 0);
1075}
1076
1077static int qsfp2_debugfs_release(struct inode *in, struct file *fp)
1078{
1079 return __qsfp_debugfs_release(in, fp, 1);
1080}
1081
1082#define DEBUGFS_OPS(nm, readroutine, writeroutine) \
1083{ \
1084 .name = nm, \
1085 .ops = { \
1086 .read = readroutine, \
1087 .write = writeroutine, \
1088 .llseek = generic_file_llseek, \
1089 }, \
1090}
1091
1092#define DEBUGFS_XOPS(nm, readf, writef, openf, releasef) \
1093{ \
1094 .name = nm, \
1095 .ops = { \
1096 .read = readf, \
1097 .write = writef, \
1098 .llseek = generic_file_llseek, \
1099 .open = openf, \
1100 .release = releasef \
1101 }, \
1102}
1103
1104static const struct counter_info cntr_ops[] = {
1105 DEBUGFS_OPS("counter_names", dev_names_read, NULL),
1106 DEBUGFS_OPS("counters", dev_counters_read, NULL),
1107 DEBUGFS_OPS("portcounter_names", portnames_read, NULL),
1108};
1109
1110static const struct counter_info port_cntr_ops[] = {
1111 DEBUGFS_OPS("port%dcounters", portcntrs_debugfs_read, NULL),
1112 DEBUGFS_XOPS("i2c1", i2c1_debugfs_read, i2c1_debugfs_write,
1113 i2c1_debugfs_open, i2c1_debugfs_release),
1114 DEBUGFS_XOPS("i2c2", i2c2_debugfs_read, i2c2_debugfs_write,
1115 i2c2_debugfs_open, i2c2_debugfs_release),
1116 DEBUGFS_OPS("qsfp_dump%d", qsfp_debugfs_dump, NULL),
1117 DEBUGFS_XOPS("qsfp1", qsfp1_debugfs_read, qsfp1_debugfs_write,
1118 qsfp1_debugfs_open, qsfp1_debugfs_release),
1119 DEBUGFS_XOPS("qsfp2", qsfp2_debugfs_read, qsfp2_debugfs_write,
1120 qsfp2_debugfs_open, qsfp2_debugfs_release),
1121 DEBUGFS_OPS("asic_flags", asic_flags_read, asic_flags_write),
1122 DEBUGFS_OPS("dc8051_memory", dc8051_memory_read, NULL),
1123 DEBUGFS_OPS("lcb", debugfs_lcb_read, debugfs_lcb_write),
1124};
1125
1126static void *_sdma_cpu_list_seq_start(struct seq_file *s, loff_t *pos)
1127{
1128 if (*pos >= num_online_cpus())
1129 return NULL;
1130
1131 return pos;
1132}
1133
1134static void *_sdma_cpu_list_seq_next(struct seq_file *s, void *v, loff_t *pos)
1135{
1136 ++*pos;
1137 if (*pos >= num_online_cpus())
1138 return NULL;
1139
1140 return pos;
1141}
1142
1143static void _sdma_cpu_list_seq_stop(struct seq_file *s, void *v)
1144{
1145 /* nothing allocated */
1146}
1147
1148static int _sdma_cpu_list_seq_show(struct seq_file *s, void *v)
1149{
1150 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
1151 struct hfi1_devdata *dd = dd_from_dev(ibd);
1152 loff_t *spos = v;
1153 loff_t i = *spos;
1154
1155 sdma_seqfile_dump_cpu_list(s, dd, (unsigned long)i);
1156 return 0;
1157}
1158
1159DEBUGFS_SEQ_FILE_OPS(sdma_cpu_list);
1160DEBUGFS_SEQ_FILE_OPEN(sdma_cpu_list)
1161DEBUGFS_FILE_OPS(sdma_cpu_list);
1162
1163#ifdef CONFIG_FAULT_INJECTION
1164static void *_fault_stats_seq_start(struct seq_file *s, loff_t *pos)
1165{
1166 struct hfi1_opcode_stats_perctx *opstats;
1167
1168 if (*pos >= ARRAY_SIZE(opstats->stats))
1169 return NULL;
1170 return pos;
1171}
1172
1173static void *_fault_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
1174{
1175 struct hfi1_opcode_stats_perctx *opstats;
1176
1177 ++*pos;
1178 if (*pos >= ARRAY_SIZE(opstats->stats))
1179 return NULL;
1180 return pos;
1181}
1182
1183static void _fault_stats_seq_stop(struct seq_file *s, void *v)
1184{
1185}
1186
1187static int _fault_stats_seq_show(struct seq_file *s, void *v)
1188{
1189 loff_t *spos = v;
1190 loff_t i = *spos, j;
1191 u64 n_packets = 0, n_bytes = 0;
1192 struct hfi1_ibdev *ibd = (struct hfi1_ibdev *)s->private;
1193 struct hfi1_devdata *dd = dd_from_dev(ibd);
1194 struct hfi1_ctxtdata *rcd;
1195
1196 for (j = 0; j < dd->first_dyn_alloc_ctxt; j++) {
1197 rcd = hfi1_rcd_get_by_index(dd, j);
1198 if (rcd) {
1199 n_packets += rcd->opstats->stats[i].n_packets;
1200 n_bytes += rcd->opstats->stats[i].n_bytes;
1201 }
1202 hfi1_rcd_put(rcd);
1203 }
1204 for_each_possible_cpu(j) {
1205 struct hfi1_opcode_stats_perctx *sp =
1206 per_cpu_ptr(dd->tx_opstats, j);
1207
1208 n_packets += sp->stats[i].n_packets;
1209 n_bytes += sp->stats[i].n_bytes;
1210 }
1211 if (!n_packets && !n_bytes)
1212 return SEQ_SKIP;
1213 if (!ibd->fault_opcode->n_rxfaults[i] &&
1214 !ibd->fault_opcode->n_txfaults[i])
1215 return SEQ_SKIP;
1216 seq_printf(s, "%02llx %llu/%llu (faults rx:%llu faults: tx:%llu)\n", i,
1217 (unsigned long long)n_packets,
1218 (unsigned long long)n_bytes,
1219 (unsigned long long)ibd->fault_opcode->n_rxfaults[i],
1220 (unsigned long long)ibd->fault_opcode->n_txfaults[i]);
1221 return 0;
1222}
1223
1224DEBUGFS_SEQ_FILE_OPS(fault_stats);
1225DEBUGFS_SEQ_FILE_OPEN(fault_stats);
1226DEBUGFS_FILE_OPS(fault_stats);
1227
1228static void fault_exit_opcode_debugfs(struct hfi1_ibdev *ibd)
1229{
1230 debugfs_remove_recursive(ibd->fault_opcode->dir);
1231 kfree(ibd->fault_opcode);
1232 ibd->fault_opcode = NULL;
1233}
1234
1235static int fault_init_opcode_debugfs(struct hfi1_ibdev *ibd)
1236{
1237 struct dentry *parent = ibd->hfi1_ibdev_dbg;
1238
1239 ibd->fault_opcode = kzalloc(sizeof(*ibd->fault_opcode), GFP_KERNEL);
1240 if (!ibd->fault_opcode)
1241 return -ENOMEM;
1242
1243 ibd->fault_opcode->attr.interval = 1;
1244 ibd->fault_opcode->attr.require_end = ULONG_MAX;
1245 ibd->fault_opcode->attr.stacktrace_depth = 32;
1246 ibd->fault_opcode->attr.dname = NULL;
1247 ibd->fault_opcode->attr.verbose = 0;
1248 ibd->fault_opcode->fault_by_opcode = false;
1249 ibd->fault_opcode->opcode = 0;
1250 ibd->fault_opcode->mask = 0xff;
1251
1252 ibd->fault_opcode->dir =
1253 fault_create_debugfs_attr("fault_opcode",
1254 parent,
1255 &ibd->fault_opcode->attr);
1256 if (IS_ERR(ibd->fault_opcode->dir)) {
1257 kfree(ibd->fault_opcode);
1258 return -ENOENT;
1259 }
1260
1261 DEBUGFS_SEQ_FILE_CREATE(fault_stats, ibd->fault_opcode->dir, ibd);
1262 if (!debugfs_create_bool("fault_by_opcode", 0600,
1263 ibd->fault_opcode->dir,
1264 &ibd->fault_opcode->fault_by_opcode))
1265 goto fail;
1266 if (!debugfs_create_x8("opcode", 0600, ibd->fault_opcode->dir,
1267 &ibd->fault_opcode->opcode))
1268 goto fail;
1269 if (!debugfs_create_x8("mask", 0600, ibd->fault_opcode->dir,
1270 &ibd->fault_opcode->mask))
1271 goto fail;
1272
1273 return 0;
1274fail:
1275 fault_exit_opcode_debugfs(ibd);
1276 return -ENOMEM;
1277}
1278
1279static void fault_exit_packet_debugfs(struct hfi1_ibdev *ibd)
1280{
1281 debugfs_remove_recursive(ibd->fault_packet->dir);
1282 kfree(ibd->fault_packet);
1283 ibd->fault_packet = NULL;
1284}
1285
1286static int fault_init_packet_debugfs(struct hfi1_ibdev *ibd)
1287{
1288 struct dentry *parent = ibd->hfi1_ibdev_dbg;
1289
1290 ibd->fault_packet = kzalloc(sizeof(*ibd->fault_packet), GFP_KERNEL);
1291 if (!ibd->fault_packet)
1292 return -ENOMEM;
1293
1294 ibd->fault_packet->attr.interval = 1;
1295 ibd->fault_packet->attr.require_end = ULONG_MAX;
1296 ibd->fault_packet->attr.stacktrace_depth = 32;
1297 ibd->fault_packet->attr.dname = NULL;
1298 ibd->fault_packet->attr.verbose = 0;
1299 ibd->fault_packet->fault_by_packet = false;
1300
1301 ibd->fault_packet->dir =
1302 fault_create_debugfs_attr("fault_packet",
1303 parent,
1304 &ibd->fault_opcode->attr);
1305 if (IS_ERR(ibd->fault_packet->dir)) {
1306 kfree(ibd->fault_packet);
1307 return -ENOENT;
1308 }
1309
1310 if (!debugfs_create_bool("fault_by_packet", 0600,
1311 ibd->fault_packet->dir,
1312 &ibd->fault_packet->fault_by_packet))
1313 goto fail;
1314 if (!debugfs_create_u64("fault_stats", 0400,
1315 ibd->fault_packet->dir,
1316 &ibd->fault_packet->n_faults))
1317 goto fail;
1318
1319 return 0;
1320fail:
1321 fault_exit_packet_debugfs(ibd);
1322 return -ENOMEM;
1323}
1324
1325static void fault_exit_debugfs(struct hfi1_ibdev *ibd)
1326{
1327 fault_exit_opcode_debugfs(ibd);
1328 fault_exit_packet_debugfs(ibd);
1329}
1330
1331static int fault_init_debugfs(struct hfi1_ibdev *ibd)
1332{
1333 int ret = 0;
1334
1335 ret = fault_init_opcode_debugfs(ibd);
1336 if (ret)
1337 return ret;
1338
1339 ret = fault_init_packet_debugfs(ibd);
1340 if (ret)
1341 fault_exit_opcode_debugfs(ibd);
1342
1343 return ret;
1344}
1345
1346bool hfi1_dbg_fault_suppress_err(struct hfi1_ibdev *ibd)
1347{
1348 return ibd->fault_suppress_err;
1349}
1350
1351bool hfi1_dbg_fault_opcode(struct rvt_qp *qp, u32 opcode, bool rx)
1352{
1353 bool ret = false;
1354 struct hfi1_ibdev *ibd = to_idev(qp->ibqp.device);
1355
1356 if (!ibd->fault_opcode || !ibd->fault_opcode->fault_by_opcode)
1357 return false;
1358 if (ibd->fault_opcode->opcode != (opcode & ibd->fault_opcode->mask))
1359 return false;
1360 ret = should_fail(&ibd->fault_opcode->attr, 1);
1361 if (ret) {
1362 trace_hfi1_fault_opcode(qp, opcode);
1363 if (rx)
1364 ibd->fault_opcode->n_rxfaults[opcode]++;
1365 else
1366 ibd->fault_opcode->n_txfaults[opcode]++;
1367 }
1368 return ret;
1369}
1370
1371bool hfi1_dbg_fault_packet(struct hfi1_packet *packet)
1372{
1373 struct rvt_dev_info *rdi = &packet->rcd->ppd->dd->verbs_dev.rdi;
1374 struct hfi1_ibdev *ibd = dev_from_rdi(rdi);
1375 bool ret = false;
1376
1377 if (!ibd->fault_packet || !ibd->fault_packet->fault_by_packet)
1378 return false;
1379
1380 ret = should_fail(&ibd->fault_packet->attr, 1);
1381 if (ret) {
1382 ++ibd->fault_packet->n_faults;
1383 trace_hfi1_fault_packet(packet);
1384 }
1385 return ret;
1386}
1387#endif
1388
1389void hfi1_dbg_ibdev_init(struct hfi1_ibdev *ibd)
1390{
1391 char name[sizeof("port0counters") + 1];
1392 char link[10];
1393 struct hfi1_devdata *dd = dd_from_dev(ibd);
1394 struct hfi1_pportdata *ppd;
1395 int unit = dd->unit;
1396 int i, j;
1397
1398 if (!hfi1_dbg_root)
1399 return;
1400 snprintf(name, sizeof(name), "%s_%d", class_name(), unit);
1401 snprintf(link, sizeof(link), "%d", unit);
1402 ibd->hfi1_ibdev_dbg = debugfs_create_dir(name, hfi1_dbg_root);
1403 if (!ibd->hfi1_ibdev_dbg) {
1404 pr_warn("create of %s failed\n", name);
1405 return;
1406 }
1407 ibd->hfi1_ibdev_link =
1408 debugfs_create_symlink(link, hfi1_dbg_root, name);
1409 if (!ibd->hfi1_ibdev_link) {
1410 pr_warn("create of %s symlink failed\n", name);
1411 return;
1412 }
1413 DEBUGFS_SEQ_FILE_CREATE(opcode_stats, ibd->hfi1_ibdev_dbg, ibd);
1414 DEBUGFS_SEQ_FILE_CREATE(tx_opcode_stats, ibd->hfi1_ibdev_dbg, ibd);
1415 DEBUGFS_SEQ_FILE_CREATE(ctx_stats, ibd->hfi1_ibdev_dbg, ibd);
1416 DEBUGFS_SEQ_FILE_CREATE(qp_stats, ibd->hfi1_ibdev_dbg, ibd);
1417 DEBUGFS_SEQ_FILE_CREATE(sdes, ibd->hfi1_ibdev_dbg, ibd);
1418 DEBUGFS_SEQ_FILE_CREATE(rcds, ibd->hfi1_ibdev_dbg, ibd);
1419 DEBUGFS_SEQ_FILE_CREATE(sdma_cpu_list, ibd->hfi1_ibdev_dbg, ibd);
1420 /* dev counter files */
1421 for (i = 0; i < ARRAY_SIZE(cntr_ops); i++)
1422 DEBUGFS_FILE_CREATE(cntr_ops[i].name,
1423 ibd->hfi1_ibdev_dbg,
1424 dd,
1425 &cntr_ops[i].ops, S_IRUGO);
1426 /* per port files */
1427 for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++)
1428 for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) {
1429 snprintf(name,
1430 sizeof(name),
1431 port_cntr_ops[i].name,
1432 j + 1);
1433 DEBUGFS_FILE_CREATE(name,
1434 ibd->hfi1_ibdev_dbg,
1435 ppd,
1436 &port_cntr_ops[i].ops,
1437 !port_cntr_ops[i].ops.write ?
1438 S_IRUGO : S_IRUGO | S_IWUSR);
1439 }
1440
1441#ifdef CONFIG_FAULT_INJECTION
1442 debugfs_create_bool("fault_suppress_err", 0600,
1443 ibd->hfi1_ibdev_dbg,
1444 &ibd->fault_suppress_err);
1445 fault_init_debugfs(ibd);
1446#endif
1447}
1448
1449void hfi1_dbg_ibdev_exit(struct hfi1_ibdev *ibd)
1450{
1451 if (!hfi1_dbg_root)
1452 goto out;
1453#ifdef CONFIG_FAULT_INJECTION
1454 fault_exit_debugfs(ibd);
1455#endif
1456 debugfs_remove(ibd->hfi1_ibdev_link);
1457 debugfs_remove_recursive(ibd->hfi1_ibdev_dbg);
1458out:
1459 ibd->hfi1_ibdev_dbg = NULL;
1460}
1461
1462/*
1463 * driver stats field names, one line per stat, single string. Used by
1464 * programs like hfistats to print the stats in a way which works for
1465 * different versions of drivers, without changing program source.
1466 * if hfi1_ib_stats changes, this needs to change. Names need to be
1467 * 12 chars or less (w/o newline), for proper display by hfistats utility.
1468 */
1469static const char * const hfi1_statnames[] = {
1470 /* must be element 0*/
1471 "KernIntr",
1472 "ErrorIntr",
1473 "Tx_Errs",
1474 "Rcv_Errs",
1475 "H/W_Errs",
1476 "NoPIOBufs",
1477 "CtxtsOpen",
1478 "RcvLen_Errs",
1479 "EgrBufFull",
1480 "EgrHdrFull"
1481};
1482
1483static void *_driver_stats_names_seq_start(struct seq_file *s, loff_t *pos)
1484{
1485 if (*pos >= ARRAY_SIZE(hfi1_statnames))
1486 return NULL;
1487 return pos;
1488}
1489
1490static void *_driver_stats_names_seq_next(
1491 struct seq_file *s,
1492 void *v,
1493 loff_t *pos)
1494{
1495 ++*pos;
1496 if (*pos >= ARRAY_SIZE(hfi1_statnames))
1497 return NULL;
1498 return pos;
1499}
1500
1501static void _driver_stats_names_seq_stop(struct seq_file *s, void *v)
1502{
1503}
1504
1505static int _driver_stats_names_seq_show(struct seq_file *s, void *v)
1506{
1507 loff_t *spos = v;
1508
1509 seq_printf(s, "%s\n", hfi1_statnames[*spos]);
1510 return 0;
1511}
1512
1513DEBUGFS_SEQ_FILE_OPS(driver_stats_names);
1514DEBUGFS_SEQ_FILE_OPEN(driver_stats_names)
1515DEBUGFS_FILE_OPS(driver_stats_names);
1516
1517static void *_driver_stats_seq_start(struct seq_file *s, loff_t *pos)
1518{
1519 if (*pos >= ARRAY_SIZE(hfi1_statnames))
1520 return NULL;
1521 return pos;
1522}
1523
1524static void *_driver_stats_seq_next(struct seq_file *s, void *v, loff_t *pos)
1525{
1526 ++*pos;
1527 if (*pos >= ARRAY_SIZE(hfi1_statnames))
1528 return NULL;
1529 return pos;
1530}
1531
1532static void _driver_stats_seq_stop(struct seq_file *s, void *v)
1533{
1534}
1535
1536static u64 hfi1_sps_ints(void)
1537{
1538 unsigned long flags;
1539 struct hfi1_devdata *dd;
1540 u64 sps_ints = 0;
1541
1542 spin_lock_irqsave(&hfi1_devs_lock, flags);
1543 list_for_each_entry(dd, &hfi1_dev_list, list) {
1544 sps_ints += get_all_cpu_total(dd->int_counter);
1545 }
1546 spin_unlock_irqrestore(&hfi1_devs_lock, flags);
1547 return sps_ints;
1548}
1549
1550static int _driver_stats_seq_show(struct seq_file *s, void *v)
1551{
1552 loff_t *spos = v;
1553 char *buffer;
1554 u64 *stats = (u64 *)&hfi1_stats;
1555 size_t sz = seq_get_buf(s, &buffer);
1556
1557 if (sz < sizeof(u64))
1558 return SEQ_SKIP;
1559 /* special case for interrupts */
1560 if (*spos == 0)
1561 *(u64 *)buffer = hfi1_sps_ints();
1562 else
1563 *(u64 *)buffer = stats[*spos];
1564 seq_commit(s, sizeof(u64));
1565 return 0;
1566}
1567
1568DEBUGFS_SEQ_FILE_OPS(driver_stats);
1569DEBUGFS_SEQ_FILE_OPEN(driver_stats)
1570DEBUGFS_FILE_OPS(driver_stats);
1571
1572void hfi1_dbg_init(void)
1573{
1574 hfi1_dbg_root = debugfs_create_dir(DRIVER_NAME, NULL);
1575 if (!hfi1_dbg_root)
1576 pr_warn("init of debugfs failed\n");
1577 DEBUGFS_SEQ_FILE_CREATE(driver_stats_names, hfi1_dbg_root, NULL);
1578 DEBUGFS_SEQ_FILE_CREATE(driver_stats, hfi1_dbg_root, NULL);
1579}
1580
1581void hfi1_dbg_exit(void)
1582{
1583 debugfs_remove_recursive(hfi1_dbg_root);
1584 hfi1_dbg_root = NULL;
1585}