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(dentry: d);
33 if (unlikely(r))
34 return r;
35 r = seq_read(file, buf, size, ppos);
36 debugfs_file_put(dentry: 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(dentry: d);
46 if (unlikely(r))
47 return r;
48 r = seq_lseek(file, offset, whence);
49 debugfs_file_put(dentry: 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(m: s, fmt: "%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(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, ctxt: 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, packets: n_packets, bytes: 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(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, packets: n_packets, bytes: 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(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(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(dev: ibd);
188 struct hfi1_ctxtdata *rcd;
189
190 if (v == SEQ_START_TOKEN) {
191 seq_puts(m: s, 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, ctxt: 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(m: s, fmt: " %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(rdi: s->private, v: 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(objp: 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(objp: 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(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(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(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(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(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(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, ctxt: 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(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(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(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(lock: &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, cntrp: &counters);
427 rval = simple_read_from_buffer(to: buf, count, ppos, from: counters, available: 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, namep: &names, NULL);
442 rval = simple_read_from_buffer(to: buf, count, ppos, from: names, available: 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(ppd: dd->pport, namep: &names, NULL);
467 rval = simple_read_from_buffer(to: buf, count, ppos, from: names, available: 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, cntrp: &counters);
482 rval = simple_read_from_buffer(to: buf, count, ppos, from: counters, available: 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(buf: p + *used, size: size - *used,
494 fmt: " 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(buf: tmp + used, size: size - used,
522 fmt: "Resource flags: 0x%016llx\n", scratch0);
523
524 /* check permanent flag */
525 if (scratch0 & CR_THERM_INIT) {
526 used += scnprintf(buf: tmp + used, size: size - used,
527 fmt: " 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, p: tmp, size, used: &used, this_hfi: dd->hfi1_id, hfi: i,
534 CR_SBUS, what: "SBus");
535 check_dyn_flag(scratch0, p: tmp, size, used: &used, this_hfi: dd->hfi1_id, hfi: i,
536 CR_EPROM, what: "EPROM");
537 check_dyn_flag(scratch0, p: tmp, size, used: &used, this_hfi: dd->hfi1_id, hfi: i,
538 CR_I2C1, what: "i2c chain 1");
539 check_dyn_flag(scratch0, p: tmp, size, used: &used, this_hfi: dd->hfi1_id, hfi: i,
540 CR_I2C2, what: "i2c chain 2");
541 }
542 used += scnprintf(buf: tmp + used, size: size - used, fmt: "Write bits to clear\n");
543
544 ret = simple_read_from_buffer(to: buf, count, ppos, from: tmp, available: used);
545 kfree(objp: 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(ptr: buff))
566 return PTR_ERR(ptr: buff);
567
568 ret = kstrtoull(s: buff, base: 0, res: &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, value: 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(lock: &dd->asic_data->asic_resource_mutex);
585
586 /* return the number of bytes written */
587 ret = count;
588
589 do_free:
590 kfree(objp: 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(dd: ppd->dd, addr: start, len: end - start,
623 result: (u64 *)(tmp + start));
624 if (rval)
625 goto done;
626 }
627
628 rval = simple_read_from_buffer(to: buf, count, ppos, from: tmp,
629 DC8051_DATA_MEM_SIZE);
630done:
631 kfree(objp: 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, offset: csr_off, data: (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, offset: 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, buf: tmp, PAGE_SIZE);
718 if (ret > 0)
719 ret = simple_read_from_buffer(to: buf, count, ppos, from: tmp, available: ret);
720 kfree(objp: 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(ptr: buff))
747 return PTR_ERR(ptr: buff);
748
749 total_written = i2c_write(ppd, target, i2c_addr, offset, bp: buff, len: 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(objp: 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, target: 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, target: 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(size: count, GFP_KERNEL);
800 if (!buff)
801 return -ENOMEM;
802
803 total_read = i2c_read(ppd, target, i2c_addr, offset, bp: buff, len: 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(to: buf, from: buff, n: total_read);
812 if (ret > 0) {
813 ret = -EFAULT;
814 goto _free;
815 }
816
817 ret = total_read;
818
819 _free:
820 kfree(objp: 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, target: 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, target: 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(ptr: buff))
854 return PTR_ERR(ptr: buff);
855
856 total_written = qsfp_write(ppd, target, addr: *ppos, bp: buff, len: 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(objp: 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, target: 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, target: 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(size: count, GFP_KERNEL);
902 if (!buff) {
903 ret = -ENOMEM;
904 goto _return;
905 }
906
907 total_read = qsfp_read(ppd, target, addr: *ppos, bp: buff, len: 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(to: buf, from: buff, n: total_read);
916 if (ret > 0) {
917 ret = -EFAULT;
918 goto _free;
919 }
920
921 ret = total_read;
922
923 _free:
924 kfree(objp: 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, target: 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, target: 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(dd: ppd->dd, resource: i2c_target(target), mswait: 0);
950}
951
952static int i2c1_debugfs_open(struct inode *in, struct file *fp)
953{
954 return __i2c_debugfs_open(in, fp, target: 0);
955}
956
957static int i2c2_debugfs_open(struct inode *in, struct file *fp)
958{
959 return __i2c_debugfs_open(in, fp, target: 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(dd: ppd->dd, resource: 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, target: 0);
976}
977
978static int i2c2_debugfs_release(struct inode *in, struct file *fp)
979{
980 return __i2c_debugfs_release(in, fp, target: 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(dd: ppd->dd, resource: i2c_target(target), mswait: 0);
990}
991
992static int qsfp1_debugfs_open(struct inode *in, struct file *fp)
993{
994 return __qsfp_debugfs_open(in, fp, target: 0);
995}
996
997static int qsfp2_debugfs_open(struct inode *in, struct file *fp)
998{
999 return __qsfp_debugfs_open(in, fp, target: 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(dd: ppd->dd, resource: 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, target: 0);
1016}
1017
1018static int qsfp2_debugfs_release(struct inode *in, struct file *fp)
1019{
1020 return __qsfp_debugfs_release(in, fp, target: 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, value: gpio_val);
1041 write_csr(dd, ASIC_GPIO_OE, value: 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(dd: ppd->dd, disable: false);
1065 else if (cdata == '1')
1066 exprom_wp_set(dd: ppd->dd, disable: 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(nr: 0, addr: &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(dd: ppd->dd, disable: false);
1089 clear_bit(nr: 0, addr: &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(dev: ibd);
1169 loff_t *spos = v;
1170 loff_t i = *spos;
1171
1172 sdma_seqfile_dump_cpu_list(s, dd, cpuid: (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(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(buf: name, size: sizeof(name), fmt: "%s_%d", class_name(), unit);
1193 snprintf(buf: link, size: sizeof(link), fmt: "%d", unit);
1194 root = debugfs_create_dir(name, parent: hfi1_dbg_root);
1195 ibd->hfi1_ibdev_dbg = root;
1196
1197 ibd->hfi1_ibdev_link =
1198 debugfs_create_symlink(name: link, parent: hfi1_dbg_root, dest: name);
1199
1200 debugfs_create_file(name: "opcode_stats", mode: 0444, parent: root, data: ibd,
1201 fops: &_opcode_stats_file_ops);
1202 debugfs_create_file(name: "tx_opcode_stats", mode: 0444, parent: root, data: ibd,
1203 fops: &_tx_opcode_stats_file_ops);
1204 debugfs_create_file(name: "ctx_stats", mode: 0444, parent: root, data: ibd, fops: &_ctx_stats_file_ops);
1205 debugfs_create_file(name: "qp_stats", mode: 0444, parent: root, data: ibd, fops: &_qp_stats_file_ops);
1206 debugfs_create_file(name: "sdes", mode: 0444, parent: root, data: ibd, fops: &_sdes_file_ops);
1207 debugfs_create_file(name: "rcds", mode: 0444, parent: root, data: ibd, fops: &_rcds_file_ops);
1208 debugfs_create_file(name: "pios", mode: 0444, parent: root, data: ibd, fops: &_pios_file_ops);
1209 debugfs_create_file(name: "sdma_cpu_list", mode: 0444, parent: root, data: ibd,
1210 fops: &_sdma_cpu_list_file_ops);
1211
1212 /* dev counter files */
1213 for (i = 0; i < ARRAY_SIZE(cntr_ops); i++)
1214 debugfs_create_file(name: cntr_ops[i].name, mode: 0444, parent: root, data: dd,
1215 fops: &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(buf: name,
1221 size: sizeof(name),
1222 fmt: port_cntr_ops[i].name,
1223 j + 1);
1224 debugfs_create_file(name,
1225 mode: !port_cntr_ops[i].ops.write ?
1226 S_IRUGO :
1227 S_IRUGO | S_IWUSR,
1228 parent: root, data: ppd, fops: &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(dentry: ibd->hfi1_ibdev_link);
1240 debugfs_remove_recursive(dentry: 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(m: s, fmt: "%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(cntr: dd->int_counter);
1328 }
1329 xa_unlock_irqrestore(&hfi1_dev_table, flags);
1330 seq_write(seq: s, data: &sps_ints, len: 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(seq: s, data: stats + *spos, len: 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(name: "driver_stats_names", mode: 0444, parent: hfi1_dbg_root, NULL,
1354 fops: &_driver_stats_names_file_ops);
1355 debugfs_create_file(name: "driver_stats", mode: 0444, parent: hfi1_dbg_root, NULL,
1356 fops: &_driver_stats_file_ops);
1357}
1358
1359void hfi1_dbg_exit(void)
1360{
1361 debugfs_remove_recursive(dentry: hfi1_dbg_root);
1362 hfi1_dbg_root = NULL;
1363}
1364

source code of linux/drivers/infiniband/hw/hfi1/debugfs.c