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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * mac80211 debugfs for wireless PHYs
4 *
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2018 - 2019 Intel Corporation
8 */
9
10#include <linux/debugfs.h>
11#include <linux/rtnetlink.h>
12#include <linux/vmalloc.h>
13#include "ieee80211_i.h"
14#include "driver-ops.h"
15#include "rate.h"
16#include "debugfs.h"
17
18#define DEBUGFS_FORMAT_BUFFER_SIZE 100
19
20int mac80211_format_buffer(char __user *userbuf, size_t count,
21 loff_t *ppos, char *fmt, ...)
22{
23 va_list args;
24 char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
25 int res;
26
27 va_start(args, fmt);
28 res = vscnprintf(buf, sizeof(buf), fmt, args);
29 va_end(args);
30
31 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
32}
33
34#define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \
35static ssize_t name## _read(struct file *file, char __user *userbuf, \
36 size_t count, loff_t *ppos) \
37{ \
38 struct ieee80211_local *local = file->private_data; \
39 \
40 return mac80211_format_buffer(userbuf, count, ppos, \
41 fmt "\n", ##value); \
42}
43
44#define DEBUGFS_READONLY_FILE_OPS(name) \
45static const struct file_operations name## _ops = { \
46 .read = name## _read, \
47 .open = simple_open, \
48 .llseek = generic_file_llseek, \
49};
50
51#define DEBUGFS_READONLY_FILE(name, fmt, value...) \
52 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \
53 DEBUGFS_READONLY_FILE_OPS(name)
54
55#define DEBUGFS_ADD(name) \
56 debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
57
58#define DEBUGFS_ADD_MODE(name, mode) \
59 debugfs_create_file(#name, mode, phyd, local, &name## _ops);
60
61
62DEBUGFS_READONLY_FILE(hw_conf, "%x",
63 local->hw.conf.flags);
64DEBUGFS_READONLY_FILE(user_power, "%d",
65 local->user_power_level);
66DEBUGFS_READONLY_FILE(power, "%d",
67 local->hw.conf.power_level);
68DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
69 local->total_ps_buffered);
70DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
71 local->wep_iv & 0xffffff);
72DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
73 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
74
75static ssize_t aqm_read(struct file *file,
76 char __user *user_buf,
77 size_t count,
78 loff_t *ppos)
79{
80 struct ieee80211_local *local = file->private_data;
81 struct fq *fq = &local->fq;
82 char buf[200];
83 int len = 0;
84
85 spin_lock_bh(&local->fq.lock);
86 rcu_read_lock();
87
88 len = scnprintf(buf, sizeof(buf),
89 "access name value\n"
90 "R fq_flows_cnt %u\n"
91 "R fq_backlog %u\n"
92 "R fq_overlimit %u\n"
93 "R fq_overmemory %u\n"
94 "R fq_collisions %u\n"
95 "R fq_memory_usage %u\n"
96 "RW fq_memory_limit %u\n"
97 "RW fq_limit %u\n"
98 "RW fq_quantum %u\n",
99 fq->flows_cnt,
100 fq->backlog,
101 fq->overmemory,
102 fq->overlimit,
103 fq->collisions,
104 fq->memory_usage,
105 fq->memory_limit,
106 fq->limit,
107 fq->quantum);
108
109 rcu_read_unlock();
110 spin_unlock_bh(&local->fq.lock);
111
112 return simple_read_from_buffer(user_buf, count, ppos,
113 buf, len);
114}
115
116static ssize_t aqm_write(struct file *file,
117 const char __user *user_buf,
118 size_t count,
119 loff_t *ppos)
120{
121 struct ieee80211_local *local = file->private_data;
122 char buf[100];
123 size_t len;
124
125 if (count > sizeof(buf))
126 return -EINVAL;
127
128 if (copy_from_user(buf, user_buf, count))
129 return -EFAULT;
130
131 buf[sizeof(buf) - 1] = '\0';
132 len = strlen(buf);
133 if (len > 0 && buf[len-1] == '\n')
134 buf[len-1] = 0;
135
136 if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1)
137 return count;
138 else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1)
139 return count;
140 else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1)
141 return count;
142
143 return -EINVAL;
144}
145
146static const struct file_operations aqm_ops = {
147 .write = aqm_write,
148 .read = aqm_read,
149 .open = simple_open,
150 .llseek = default_llseek,
151};
152
153static ssize_t airtime_flags_read(struct file *file,
154 char __user *user_buf,
155 size_t count, loff_t *ppos)
156{
157 struct ieee80211_local *local = file->private_data;
158 char buf[128] = {}, *pos, *end;
159
160 pos = buf;
161 end = pos + sizeof(buf) - 1;
162
163 if (local->airtime_flags & AIRTIME_USE_TX)
164 pos += scnprintf(pos, end - pos, "AIRTIME_TX\t(%lx)\n",
165 AIRTIME_USE_TX);
166 if (local->airtime_flags & AIRTIME_USE_RX)
167 pos += scnprintf(pos, end - pos, "AIRTIME_RX\t(%lx)\n",
168 AIRTIME_USE_RX);
169
170 return simple_read_from_buffer(user_buf, count, ppos, buf,
171 strlen(buf));
172}
173
174static ssize_t airtime_flags_write(struct file *file,
175 const char __user *user_buf,
176 size_t count, loff_t *ppos)
177{
178 struct ieee80211_local *local = file->private_data;
179 char buf[16];
180 size_t len;
181
182 if (count > sizeof(buf))
183 return -EINVAL;
184
185 if (copy_from_user(buf, user_buf, count))
186 return -EFAULT;
187
188 buf[sizeof(buf) - 1] = 0;
189 len = strlen(buf);
190 if (len > 0 && buf[len - 1] == '\n')
191 buf[len - 1] = 0;
192
193 if (kstrtou16(buf, 0, &local->airtime_flags))
194 return -EINVAL;
195
196 return count;
197}
198
199static const struct file_operations airtime_flags_ops = {
200 .write = airtime_flags_write,
201 .read = airtime_flags_read,
202 .open = simple_open,
203 .llseek = default_llseek,
204};
205
206static ssize_t aql_txq_limit_read(struct file *file,
207 char __user *user_buf,
208 size_t count,
209 loff_t *ppos)
210{
211 struct ieee80211_local *local = file->private_data;
212 char buf[400];
213 int len = 0;
214
215 len = scnprintf(buf, sizeof(buf),
216 "AC AQL limit low AQL limit high\n"
217 "VO %u %u\n"
218 "VI %u %u\n"
219 "BE %u %u\n"
220 "BK %u %u\n",
221 local->aql_txq_limit_low[IEEE80211_AC_VO],
222 local->aql_txq_limit_high[IEEE80211_AC_VO],
223 local->aql_txq_limit_low[IEEE80211_AC_VI],
224 local->aql_txq_limit_high[IEEE80211_AC_VI],
225 local->aql_txq_limit_low[IEEE80211_AC_BE],
226 local->aql_txq_limit_high[IEEE80211_AC_BE],
227 local->aql_txq_limit_low[IEEE80211_AC_BK],
228 local->aql_txq_limit_high[IEEE80211_AC_BK]);
229 return simple_read_from_buffer(user_buf, count, ppos,
230 buf, len);
231}
232
233static ssize_t aql_txq_limit_write(struct file *file,
234 const char __user *user_buf,
235 size_t count,
236 loff_t *ppos)
237{
238 struct ieee80211_local *local = file->private_data;
239 char buf[100];
240 size_t len;
241 u32 ac, q_limit_low, q_limit_high, q_limit_low_old, q_limit_high_old;
242 struct sta_info *sta;
243
244 if (count > sizeof(buf))
245 return -EINVAL;
246
247 if (copy_from_user(buf, user_buf, count))
248 return -EFAULT;
249
250 buf[sizeof(buf) - 1] = 0;
251 len = strlen(buf);
252 if (len > 0 && buf[len - 1] == '\n')
253 buf[len - 1] = 0;
254
255 if (sscanf(buf, "%u %u %u", &ac, &q_limit_low, &q_limit_high) != 3)
256 return -EINVAL;
257
258 if (ac >= IEEE80211_NUM_ACS)
259 return -EINVAL;
260
261 q_limit_low_old = local->aql_txq_limit_low[ac];
262 q_limit_high_old = local->aql_txq_limit_high[ac];
263
264 local->aql_txq_limit_low[ac] = q_limit_low;
265 local->aql_txq_limit_high[ac] = q_limit_high;
266
267 mutex_lock(&local->sta_mtx);
268 list_for_each_entry(sta, &local->sta_list, list) {
269 /* If a sta has customized queue limits, keep it */
270 if (sta->airtime[ac].aql_limit_low == q_limit_low_old &&
271 sta->airtime[ac].aql_limit_high == q_limit_high_old) {
272 sta->airtime[ac].aql_limit_low = q_limit_low;
273 sta->airtime[ac].aql_limit_high = q_limit_high;
274 }
275 }
276 mutex_unlock(&local->sta_mtx);
277 return count;
278}
279
280static const struct file_operations aql_txq_limit_ops = {
281 .write = aql_txq_limit_write,
282 .read = aql_txq_limit_read,
283 .open = simple_open,
284 .llseek = default_llseek,
285};
286
287static ssize_t force_tx_status_read(struct file *file,
288 char __user *user_buf,
289 size_t count,
290 loff_t *ppos)
291{
292 struct ieee80211_local *local = file->private_data;
293 char buf[3];
294 int len = 0;
295
296 len = scnprintf(buf, sizeof(buf), "%d\n", (int)local->force_tx_status);
297
298 return simple_read_from_buffer(user_buf, count, ppos,
299 buf, len);
300}
301
302static ssize_t force_tx_status_write(struct file *file,
303 const char __user *user_buf,
304 size_t count,
305 loff_t *ppos)
306{
307 struct ieee80211_local *local = file->private_data;
308 char buf[3];
309 size_t len;
310
311 if (count > sizeof(buf))
312 return -EINVAL;
313
314 if (copy_from_user(buf, user_buf, count))
315 return -EFAULT;
316
317 buf[sizeof(buf) - 1] = '\0';
318 len = strlen(buf);
319 if (len > 0 && buf[len - 1] == '\n')
320 buf[len - 1] = 0;
321
322 if (buf[0] == '0' && buf[1] == '\0')
323 local->force_tx_status = 0;
324 else if (buf[0] == '1' && buf[1] == '\0')
325 local->force_tx_status = 1;
326 else
327 return -EINVAL;
328
329 return count;
330}
331
332static const struct file_operations force_tx_status_ops = {
333 .write = force_tx_status_write,
334 .read = force_tx_status_read,
335 .open = simple_open,
336 .llseek = default_llseek,
337};
338
339#ifdef CONFIG_PM
340static ssize_t reset_write(struct file *file, const char __user *user_buf,
341 size_t count, loff_t *ppos)
342{
343 struct ieee80211_local *local = file->private_data;
344
345 rtnl_lock();
346 __ieee80211_suspend(&local->hw, NULL);
347 __ieee80211_resume(&local->hw);
348 rtnl_unlock();
349
350 return count;
351}
352
353static const struct file_operations reset_ops = {
354 .write = reset_write,
355 .open = simple_open,
356 .llseek = noop_llseek,
357};
358#endif
359
360static const char *hw_flag_names[] = {
361#define FLAG(F) [IEEE80211_HW_##F] = #F
362 FLAG(HAS_RATE_CONTROL),
363 FLAG(RX_INCLUDES_FCS),
364 FLAG(HOST_BROADCAST_PS_BUFFERING),
365 FLAG(SIGNAL_UNSPEC),
366 FLAG(SIGNAL_DBM),
367 FLAG(NEED_DTIM_BEFORE_ASSOC),
368 FLAG(SPECTRUM_MGMT),
369 FLAG(AMPDU_AGGREGATION),
370 FLAG(SUPPORTS_PS),
371 FLAG(PS_NULLFUNC_STACK),
372 FLAG(SUPPORTS_DYNAMIC_PS),
373 FLAG(MFP_CAPABLE),
374 FLAG(WANT_MONITOR_VIF),
375 FLAG(NO_AUTO_VIF),
376 FLAG(SW_CRYPTO_CONTROL),
377 FLAG(SUPPORT_FAST_XMIT),
378 FLAG(REPORTS_TX_ACK_STATUS),
379 FLAG(CONNECTION_MONITOR),
380 FLAG(QUEUE_CONTROL),
381 FLAG(SUPPORTS_PER_STA_GTK),
382 FLAG(AP_LINK_PS),
383 FLAG(TX_AMPDU_SETUP_IN_HW),
384 FLAG(SUPPORTS_RC_TABLE),
385 FLAG(P2P_DEV_ADDR_FOR_INTF),
386 FLAG(TIMING_BEACON_ONLY),
387 FLAG(SUPPORTS_HT_CCK_RATES),
388 FLAG(CHANCTX_STA_CSA),
389 FLAG(SUPPORTS_CLONED_SKBS),
390 FLAG(SINGLE_SCAN_ON_ALL_BANDS),
391 FLAG(TDLS_WIDER_BW),
392 FLAG(SUPPORTS_AMSDU_IN_AMPDU),
393 FLAG(BEACON_TX_STATUS),
394 FLAG(NEEDS_UNIQUE_STA_ADDR),
395 FLAG(SUPPORTS_REORDERING_BUFFER),
396 FLAG(USES_RSS),
397 FLAG(TX_AMSDU),
398 FLAG(TX_FRAG_LIST),
399 FLAG(REPORTS_LOW_ACK),
400 FLAG(SUPPORTS_TX_FRAG),
401 FLAG(SUPPORTS_TDLS_BUFFER_STA),
402 FLAG(DEAUTH_NEED_MGD_TX_PREP),
403 FLAG(DOESNT_SUPPORT_QOS_NDP),
404 FLAG(BUFF_MMPDU_TXQ),
405 FLAG(SUPPORTS_VHT_EXT_NSS_BW),
406 FLAG(STA_MMPDU_TXQ),
407 FLAG(TX_STATUS_NO_AMPDU_LEN),
408 FLAG(SUPPORTS_MULTI_BSSID),
409 FLAG(SUPPORTS_ONLY_HE_MULTI_BSSID),
410 FLAG(AMPDU_KEYBORDER_SUPPORT),
411#undef FLAG
412};
413
414static ssize_t hwflags_read(struct file *file, char __user *user_buf,
415 size_t count, loff_t *ppos)
416{
417 struct ieee80211_local *local = file->private_data;
418 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
419 char *buf = kzalloc(bufsz, GFP_KERNEL);
420 char *pos = buf, *end = buf + bufsz - 1;
421 ssize_t rv;
422 int i;
423
424 if (!buf)
425 return -ENOMEM;
426
427 /* fail compilation if somebody adds or removes
428 * a flag without updating the name array above
429 */
430 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
431
432 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
433 if (test_bit(i, local->hw.flags))
434 pos += scnprintf(pos, end - pos, "%s\n",
435 hw_flag_names[i]);
436 }
437
438 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
439 kfree(buf);
440 return rv;
441}
442
443static ssize_t misc_read(struct file *file, char __user *user_buf,
444 size_t count, loff_t *ppos)
445{
446 struct ieee80211_local *local = file->private_data;
447 /* Max len of each line is 16 characters, plus 9 for 'pending:\n' */
448 size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9;
449 char *buf;
450 char *pos, *end;
451 ssize_t rv;
452 int i;
453 int ln;
454
455 buf = kzalloc(bufsz, GFP_KERNEL);
456 if (!buf)
457 return -ENOMEM;
458
459 pos = buf;
460 end = buf + bufsz - 1;
461
462 pos += scnprintf(pos, end - pos, "pending:\n");
463
464 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
465 ln = skb_queue_len(&local->pending[i]);
466 pos += scnprintf(pos, end - pos, "[%i] %d\n",
467 i, ln);
468 }
469
470 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
471 kfree(buf);
472 return rv;
473}
474
475static ssize_t queues_read(struct file *file, char __user *user_buf,
476 size_t count, loff_t *ppos)
477{
478 struct ieee80211_local *local = file->private_data;
479 unsigned long flags;
480 char buf[IEEE80211_MAX_QUEUES * 20];
481 int q, res = 0;
482
483 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
484 for (q = 0; q < local->hw.queues; q++)
485 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
486 local->queue_stop_reasons[q],
487 skb_queue_len(&local->pending[q]));
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489
490 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
491}
492
493DEBUGFS_READONLY_FILE_OPS(hwflags);
494DEBUGFS_READONLY_FILE_OPS(queues);
495DEBUGFS_READONLY_FILE_OPS(misc);
496
497/* statistics stuff */
498
499static ssize_t format_devstat_counter(struct ieee80211_local *local,
500 char __user *userbuf,
501 size_t count, loff_t *ppos,
502 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
503 int buflen))
504{
505 struct ieee80211_low_level_stats stats;
506 char buf[20];
507 int res;
508
509 rtnl_lock();
510 res = drv_get_stats(local, &stats);
511 rtnl_unlock();
512 if (res)
513 return res;
514 res = printvalue(&stats, buf, sizeof(buf));
515 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
516}
517
518#define DEBUGFS_DEVSTATS_FILE(name) \
519static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
520 char *buf, int buflen) \
521{ \
522 return scnprintf(buf, buflen, "%u\n", stats->name); \
523} \
524static ssize_t stats_ ##name## _read(struct file *file, \
525 char __user *userbuf, \
526 size_t count, loff_t *ppos) \
527{ \
528 return format_devstat_counter(file->private_data, \
529 userbuf, \
530 count, \
531 ppos, \
532 print_devstats_##name); \
533} \
534 \
535static const struct file_operations stats_ ##name## _ops = { \
536 .read = stats_ ##name## _read, \
537 .open = simple_open, \
538 .llseek = generic_file_llseek, \
539};
540
541#define DEBUGFS_STATS_ADD(name) \
542 debugfs_create_u32(#name, 0400, statsd, &local->name);
543#define DEBUGFS_DEVSTATS_ADD(name) \
544 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
545
546DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
547DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
548DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
549DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
550
551void debugfs_hw_add(struct ieee80211_local *local)
552{
553 struct dentry *phyd = local->hw.wiphy->debugfsdir;
554 struct dentry *statsd;
555
556 if (!phyd)
557 return;
558
559 local->debugfs.keys = debugfs_create_dir("keys", phyd);
560
561 DEBUGFS_ADD(total_ps_buffered);
562 DEBUGFS_ADD(wep_iv);
563 DEBUGFS_ADD(rate_ctrl_alg);
564 DEBUGFS_ADD(queues);
565 DEBUGFS_ADD(misc);
566#ifdef CONFIG_PM
567 DEBUGFS_ADD_MODE(reset, 0200);
568#endif
569 DEBUGFS_ADD(hwflags);
570 DEBUGFS_ADD(user_power);
571 DEBUGFS_ADD(power);
572 DEBUGFS_ADD(hw_conf);
573 DEBUGFS_ADD_MODE(force_tx_status, 0600);
574
575 if (local->ops->wake_tx_queue)
576 DEBUGFS_ADD_MODE(aqm, 0600);
577
578 DEBUGFS_ADD_MODE(airtime_flags, 0600);
579
580 DEBUGFS_ADD(aql_txq_limit);
581 debugfs_create_u32("aql_threshold", 0600,
582 phyd, &local->aql_threshold);
583
584 statsd = debugfs_create_dir("statistics", phyd);
585
586 /* if the dir failed, don't put all the other things into the root! */
587 if (!statsd)
588 return;
589
590#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
591 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
592 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
593 DEBUGFS_STATS_ADD(dot11FailedCount);
594 DEBUGFS_STATS_ADD(dot11RetryCount);
595 DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
596 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
597 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
598 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
599 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
600 DEBUGFS_STATS_ADD(tx_handlers_drop);
601 DEBUGFS_STATS_ADD(tx_handlers_queued);
602 DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
603 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
604 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
605 DEBUGFS_STATS_ADD(rx_handlers_drop);
606 DEBUGFS_STATS_ADD(rx_handlers_queued);
607 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
608 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
609 DEBUGFS_STATS_ADD(tx_expand_skb_head);
610 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
611 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
612 DEBUGFS_STATS_ADD(rx_handlers_fragments);
613 DEBUGFS_STATS_ADD(tx_status_drop);
614#endif
615 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
616 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
617 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
618 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
619}
1/*
2 * mac80211 debugfs for wireless PHYs
3 *
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 *
7 * GPLv2
8 *
9 */
10
11#include <linux/debugfs.h>
12#include <linux/rtnetlink.h>
13#include "ieee80211_i.h"
14#include "driver-ops.h"
15#include "rate.h"
16#include "debugfs.h"
17
18#define DEBUGFS_FORMAT_BUFFER_SIZE 100
19
20int mac80211_format_buffer(char __user *userbuf, size_t count,
21 loff_t *ppos, char *fmt, ...)
22{
23 va_list args;
24 char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
25 int res;
26
27 va_start(args, fmt);
28 res = vscnprintf(buf, sizeof(buf), fmt, args);
29 va_end(args);
30
31 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
32}
33
34#define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \
35static ssize_t name## _read(struct file *file, char __user *userbuf, \
36 size_t count, loff_t *ppos) \
37{ \
38 struct ieee80211_local *local = file->private_data; \
39 \
40 return mac80211_format_buffer(userbuf, count, ppos, \
41 fmt "\n", ##value); \
42}
43
44#define DEBUGFS_READONLY_FILE_OPS(name) \
45static const struct file_operations name## _ops = { \
46 .read = name## _read, \
47 .open = simple_open, \
48 .llseek = generic_file_llseek, \
49};
50
51#define DEBUGFS_READONLY_FILE(name, fmt, value...) \
52 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \
53 DEBUGFS_READONLY_FILE_OPS(name)
54
55#define DEBUGFS_ADD(name) \
56 debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
57
58#define DEBUGFS_ADD_MODE(name, mode) \
59 debugfs_create_file(#name, mode, phyd, local, &name## _ops);
60
61
62DEBUGFS_READONLY_FILE(user_power, "%d",
63 local->user_power_level);
64DEBUGFS_READONLY_FILE(power, "%d",
65 local->hw.conf.power_level);
66DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
67 local->total_ps_buffered);
68DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
69 local->wep_iv & 0xffffff);
70DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
71 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
72
73#ifdef CONFIG_PM
74static ssize_t reset_write(struct file *file, const char __user *user_buf,
75 size_t count, loff_t *ppos)
76{
77 struct ieee80211_local *local = file->private_data;
78
79 rtnl_lock();
80 __ieee80211_suspend(&local->hw, NULL);
81 __ieee80211_resume(&local->hw);
82 rtnl_unlock();
83
84 return count;
85}
86
87static const struct file_operations reset_ops = {
88 .write = reset_write,
89 .open = simple_open,
90 .llseek = noop_llseek,
91};
92#endif
93
94static const char *hw_flag_names[] = {
95#define FLAG(F) [IEEE80211_HW_##F] = #F
96 FLAG(HAS_RATE_CONTROL),
97 FLAG(RX_INCLUDES_FCS),
98 FLAG(HOST_BROADCAST_PS_BUFFERING),
99 FLAG(SIGNAL_UNSPEC),
100 FLAG(SIGNAL_DBM),
101 FLAG(NEED_DTIM_BEFORE_ASSOC),
102 FLAG(SPECTRUM_MGMT),
103 FLAG(AMPDU_AGGREGATION),
104 FLAG(SUPPORTS_PS),
105 FLAG(PS_NULLFUNC_STACK),
106 FLAG(SUPPORTS_DYNAMIC_PS),
107 FLAG(MFP_CAPABLE),
108 FLAG(WANT_MONITOR_VIF),
109 FLAG(NO_AUTO_VIF),
110 FLAG(SW_CRYPTO_CONTROL),
111 FLAG(SUPPORT_FAST_XMIT),
112 FLAG(REPORTS_TX_ACK_STATUS),
113 FLAG(CONNECTION_MONITOR),
114 FLAG(QUEUE_CONTROL),
115 FLAG(SUPPORTS_PER_STA_GTK),
116 FLAG(AP_LINK_PS),
117 FLAG(TX_AMPDU_SETUP_IN_HW),
118 FLAG(SUPPORTS_RC_TABLE),
119 FLAG(P2P_DEV_ADDR_FOR_INTF),
120 FLAG(TIMING_BEACON_ONLY),
121 FLAG(SUPPORTS_HT_CCK_RATES),
122 FLAG(CHANCTX_STA_CSA),
123 FLAG(SUPPORTS_CLONED_SKBS),
124 FLAG(SINGLE_SCAN_ON_ALL_BANDS),
125 FLAG(TDLS_WIDER_BW),
126 FLAG(SUPPORTS_AMSDU_IN_AMPDU),
127 FLAG(BEACON_TX_STATUS),
128 FLAG(NEEDS_UNIQUE_STA_ADDR),
129 FLAG(SUPPORTS_REORDERING_BUFFER),
130#undef FLAG
131};
132
133static ssize_t hwflags_read(struct file *file, char __user *user_buf,
134 size_t count, loff_t *ppos)
135{
136 struct ieee80211_local *local = file->private_data;
137 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
138 char *buf = kzalloc(bufsz, GFP_KERNEL);
139 char *pos = buf, *end = buf + bufsz - 1;
140 ssize_t rv;
141 int i;
142
143 if (!buf)
144 return -ENOMEM;
145
146 /* fail compilation if somebody adds or removes
147 * a flag without updating the name array above
148 */
149 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
150
151 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
152 if (test_bit(i, local->hw.flags))
153 pos += scnprintf(pos, end - pos, "%s\n",
154 hw_flag_names[i]);
155 }
156
157 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
158 kfree(buf);
159 return rv;
160}
161
162static ssize_t queues_read(struct file *file, char __user *user_buf,
163 size_t count, loff_t *ppos)
164{
165 struct ieee80211_local *local = file->private_data;
166 unsigned long flags;
167 char buf[IEEE80211_MAX_QUEUES * 20];
168 int q, res = 0;
169
170 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
171 for (q = 0; q < local->hw.queues; q++)
172 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
173 local->queue_stop_reasons[q],
174 skb_queue_len(&local->pending[q]));
175 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
176
177 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
178}
179
180DEBUGFS_READONLY_FILE_OPS(hwflags);
181DEBUGFS_READONLY_FILE_OPS(queues);
182
183/* statistics stuff */
184
185static ssize_t format_devstat_counter(struct ieee80211_local *local,
186 char __user *userbuf,
187 size_t count, loff_t *ppos,
188 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
189 int buflen))
190{
191 struct ieee80211_low_level_stats stats;
192 char buf[20];
193 int res;
194
195 rtnl_lock();
196 res = drv_get_stats(local, &stats);
197 rtnl_unlock();
198 if (res)
199 return res;
200 res = printvalue(&stats, buf, sizeof(buf));
201 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
202}
203
204#define DEBUGFS_DEVSTATS_FILE(name) \
205static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
206 char *buf, int buflen) \
207{ \
208 return scnprintf(buf, buflen, "%u\n", stats->name); \
209} \
210static ssize_t stats_ ##name## _read(struct file *file, \
211 char __user *userbuf, \
212 size_t count, loff_t *ppos) \
213{ \
214 return format_devstat_counter(file->private_data, \
215 userbuf, \
216 count, \
217 ppos, \
218 print_devstats_##name); \
219} \
220 \
221static const struct file_operations stats_ ##name## _ops = { \
222 .read = stats_ ##name## _read, \
223 .open = simple_open, \
224 .llseek = generic_file_llseek, \
225};
226
227#define DEBUGFS_STATS_ADD(name) \
228 debugfs_create_u32(#name, 0400, statsd, &local->name);
229#define DEBUGFS_DEVSTATS_ADD(name) \
230 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
231
232DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
233DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
234DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
235DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
236
237void debugfs_hw_add(struct ieee80211_local *local)
238{
239 struct dentry *phyd = local->hw.wiphy->debugfsdir;
240 struct dentry *statsd;
241
242 if (!phyd)
243 return;
244
245 local->debugfs.keys = debugfs_create_dir("keys", phyd);
246
247 DEBUGFS_ADD(total_ps_buffered);
248 DEBUGFS_ADD(wep_iv);
249 DEBUGFS_ADD(queues);
250#ifdef CONFIG_PM
251 DEBUGFS_ADD_MODE(reset, 0200);
252#endif
253 DEBUGFS_ADD(hwflags);
254 DEBUGFS_ADD(user_power);
255 DEBUGFS_ADD(power);
256
257 statsd = debugfs_create_dir("statistics", phyd);
258
259 /* if the dir failed, don't put all the other things into the root! */
260 if (!statsd)
261 return;
262
263#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
264 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
265 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
266 DEBUGFS_STATS_ADD(dot11FailedCount);
267 DEBUGFS_STATS_ADD(dot11RetryCount);
268 DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
269 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
270 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
271 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
272 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
273 DEBUGFS_STATS_ADD(tx_handlers_drop);
274 DEBUGFS_STATS_ADD(tx_handlers_queued);
275 DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
276 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
277 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
278 DEBUGFS_STATS_ADD(rx_handlers_drop);
279 DEBUGFS_STATS_ADD(rx_handlers_queued);
280 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
281 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
282 DEBUGFS_STATS_ADD(tx_expand_skb_head);
283 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
284 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
285 DEBUGFS_STATS_ADD(rx_handlers_fragments);
286 DEBUGFS_STATS_ADD(tx_status_drop);
287#endif
288 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
289 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
290 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
291 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
292}