1 // SPDX-License-Identifier: GPL-2.0-only
3 * mac80211 debugfs for wireless PHYs
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2018 - 2019 Intel Corporation
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"
18 #define DEBUGFS_FORMAT_BUFFER_SIZE 100
20 int mac80211_format_buffer(char __user
*userbuf
, size_t count
,
21 loff_t
*ppos
, char *fmt
, ...)
24 char buf
[DEBUGFS_FORMAT_BUFFER_SIZE
];
28 res
= vscnprintf(buf
, sizeof(buf
), fmt
, args
);
31 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, res
);
34 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \
35 static ssize_t name## _read(struct file *file, char __user *userbuf, \
36 size_t count, loff_t *ppos) \
38 struct ieee80211_local *local = file->private_data; \
40 return mac80211_format_buffer(userbuf, count, ppos, \
44 #define DEBUGFS_READONLY_FILE_OPS(name) \
45 static const struct file_operations name## _ops = { \
46 .read = name## _read, \
47 .open = simple_open, \
48 .llseek = generic_file_llseek, \
51 #define DEBUGFS_READONLY_FILE(name, fmt, value...) \
52 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \
53 DEBUGFS_READONLY_FILE_OPS(name)
55 #define DEBUGFS_ADD(name) \
56 debugfs_create_file(#name, 0400, phyd, local, &name## _ops)
58 #define DEBUGFS_ADD_MODE(name, mode) \
59 debugfs_create_file(#name, mode, phyd, local, &name## _ops);
62 DEBUGFS_READONLY_FILE(hw_conf
, "%x",
63 local
->hw
.conf
.flags
);
64 DEBUGFS_READONLY_FILE(user_power
, "%d",
65 local
->user_power_level
);
66 DEBUGFS_READONLY_FILE(power
, "%d",
67 local
->hw
.conf
.power_level
);
68 DEBUGFS_READONLY_FILE(total_ps_buffered
, "%d",
69 local
->total_ps_buffered
);
70 DEBUGFS_READONLY_FILE(wep_iv
, "%#08x",
71 local
->wep_iv
& 0xffffff);
72 DEBUGFS_READONLY_FILE(rate_ctrl_alg
, "%s",
73 local
->rate_ctrl
? local
->rate_ctrl
->ops
->name
: "hw/driver");
75 static ssize_t
aqm_read(struct file
*file
,
76 char __user
*user_buf
,
80 struct ieee80211_local
*local
= file
->private_data
;
81 struct fq
*fq
= &local
->fq
;
85 spin_lock_bh(&local
->fq
.lock
);
88 len
= scnprintf(buf
, sizeof(buf
),
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"
110 spin_unlock_bh(&local
->fq
.lock
);
112 return simple_read_from_buffer(user_buf
, count
, ppos
,
116 static ssize_t
aqm_write(struct file
*file
,
117 const char __user
*user_buf
,
121 struct ieee80211_local
*local
= file
->private_data
;
125 if (count
> sizeof(buf
))
128 if (copy_from_user(buf
, user_buf
, count
))
131 buf
[sizeof(buf
) - 1] = '\0';
133 if (len
> 0 && buf
[len
-1] == '\n')
136 if (sscanf(buf
, "fq_limit %u", &local
->fq
.limit
) == 1)
138 else if (sscanf(buf
, "fq_memory_limit %u", &local
->fq
.memory_limit
) == 1)
140 else if (sscanf(buf
, "fq_quantum %u", &local
->fq
.quantum
) == 1)
146 static const struct file_operations aqm_ops
= {
150 .llseek
= default_llseek
,
153 static ssize_t
airtime_flags_read(struct file
*file
,
154 char __user
*user_buf
,
155 size_t count
, loff_t
*ppos
)
157 struct ieee80211_local
*local
= file
->private_data
;
158 char buf
[128] = {}, *pos
, *end
;
161 end
= pos
+ sizeof(buf
) - 1;
163 if (local
->airtime_flags
& AIRTIME_USE_TX
)
164 pos
+= scnprintf(pos
, end
- pos
, "AIRTIME_TX\t(%lx)\n",
166 if (local
->airtime_flags
& AIRTIME_USE_RX
)
167 pos
+= scnprintf(pos
, end
- pos
, "AIRTIME_RX\t(%lx)\n",
170 return simple_read_from_buffer(user_buf
, count
, ppos
, buf
,
174 static ssize_t
airtime_flags_write(struct file
*file
,
175 const char __user
*user_buf
,
176 size_t count
, loff_t
*ppos
)
178 struct ieee80211_local
*local
= file
->private_data
;
182 if (count
> sizeof(buf
))
185 if (copy_from_user(buf
, user_buf
, count
))
188 buf
[sizeof(buf
) - 1] = 0;
190 if (len
> 0 && buf
[len
- 1] == '\n')
193 if (kstrtou16(buf
, 0, &local
->airtime_flags
))
199 static const struct file_operations airtime_flags_ops
= {
200 .write
= airtime_flags_write
,
201 .read
= airtime_flags_read
,
203 .llseek
= default_llseek
,
206 static ssize_t
aql_txq_limit_read(struct file
*file
,
207 char __user
*user_buf
,
211 struct ieee80211_local
*local
= file
->private_data
;
215 len
= scnprintf(buf
, sizeof(buf
),
216 "AC AQL limit low AQL limit high\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
,
233 static ssize_t
aql_txq_limit_write(struct file
*file
,
234 const char __user
*user_buf
,
238 struct ieee80211_local
*local
= file
->private_data
;
241 u32 ac
, q_limit_low
, q_limit_high
, q_limit_low_old
, q_limit_high_old
;
242 struct sta_info
*sta
;
244 if (count
> sizeof(buf
))
247 if (copy_from_user(buf
, user_buf
, count
))
250 buf
[sizeof(buf
) - 1] = 0;
252 if (len
> 0 && buf
[len
- 1] == '\n')
255 if (sscanf(buf
, "%u %u %u", &ac
, &q_limit_low
, &q_limit_high
) != 3)
258 if (ac
>= IEEE80211_NUM_ACS
)
261 q_limit_low_old
= local
->aql_txq_limit_low
[ac
];
262 q_limit_high_old
= local
->aql_txq_limit_high
[ac
];
264 local
->aql_txq_limit_low
[ac
] = q_limit_low
;
265 local
->aql_txq_limit_high
[ac
] = q_limit_high
;
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
;
276 mutex_unlock(&local
->sta_mtx
);
280 static const struct file_operations aql_txq_limit_ops
= {
281 .write
= aql_txq_limit_write
,
282 .read
= aql_txq_limit_read
,
284 .llseek
= default_llseek
,
287 static ssize_t
force_tx_status_read(struct file
*file
,
288 char __user
*user_buf
,
292 struct ieee80211_local
*local
= file
->private_data
;
296 len
= scnprintf(buf
, sizeof(buf
), "%d\n", (int)local
->force_tx_status
);
298 return simple_read_from_buffer(user_buf
, count
, ppos
,
302 static ssize_t
force_tx_status_write(struct file
*file
,
303 const char __user
*user_buf
,
307 struct ieee80211_local
*local
= file
->private_data
;
311 if (count
> sizeof(buf
))
314 if (copy_from_user(buf
, user_buf
, count
))
317 buf
[sizeof(buf
) - 1] = '\0';
319 if (len
> 0 && buf
[len
- 1] == '\n')
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;
332 static const struct file_operations force_tx_status_ops
= {
333 .write
= force_tx_status_write
,
334 .read
= force_tx_status_read
,
336 .llseek
= default_llseek
,
340 static ssize_t
reset_write(struct file
*file
, const char __user
*user_buf
,
341 size_t count
, loff_t
*ppos
)
343 struct ieee80211_local
*local
= file
->private_data
;
346 __ieee80211_suspend(&local
->hw
, NULL
);
347 __ieee80211_resume(&local
->hw
);
353 static const struct file_operations reset_ops
= {
354 .write
= reset_write
,
356 .llseek
= noop_llseek
,
360 static 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
),
367 FLAG(NEED_DTIM_BEFORE_ASSOC
),
369 FLAG(AMPDU_AGGREGATION
),
371 FLAG(PS_NULLFUNC_STACK
),
372 FLAG(SUPPORTS_DYNAMIC_PS
),
374 FLAG(WANT_MONITOR_VIF
),
376 FLAG(SW_CRYPTO_CONTROL
),
377 FLAG(SUPPORT_FAST_XMIT
),
378 FLAG(REPORTS_TX_ACK_STATUS
),
379 FLAG(CONNECTION_MONITOR
),
381 FLAG(SUPPORTS_PER_STA_GTK
),
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
),
392 FLAG(SUPPORTS_AMSDU_IN_AMPDU
),
393 FLAG(BEACON_TX_STATUS
),
394 FLAG(NEEDS_UNIQUE_STA_ADDR
),
395 FLAG(SUPPORTS_REORDERING_BUFFER
),
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
),
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 FLAG(SUPPORTS_TX_ENCAP_OFFLOAD
),
415 static ssize_t
hwflags_read(struct file
*file
, char __user
*user_buf
,
416 size_t count
, loff_t
*ppos
)
418 struct ieee80211_local
*local
= file
->private_data
;
419 size_t bufsz
= 30 * NUM_IEEE80211_HW_FLAGS
;
420 char *buf
= kzalloc(bufsz
, GFP_KERNEL
);
421 char *pos
= buf
, *end
= buf
+ bufsz
- 1;
428 /* fail compilation if somebody adds or removes
429 * a flag without updating the name array above
431 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names
) != NUM_IEEE80211_HW_FLAGS
);
433 for (i
= 0; i
< NUM_IEEE80211_HW_FLAGS
; i
++) {
434 if (test_bit(i
, local
->hw
.flags
))
435 pos
+= scnprintf(pos
, end
- pos
, "%s\n",
439 rv
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, strlen(buf
));
444 static ssize_t
misc_read(struct file
*file
, char __user
*user_buf
,
445 size_t count
, loff_t
*ppos
)
447 struct ieee80211_local
*local
= file
->private_data
;
448 /* Max len of each line is 16 characters, plus 9 for 'pending:\n' */
449 size_t bufsz
= IEEE80211_MAX_QUEUES
* 16 + 9;
456 buf
= kzalloc(bufsz
, GFP_KERNEL
);
461 end
= buf
+ bufsz
- 1;
463 pos
+= scnprintf(pos
, end
- pos
, "pending:\n");
465 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
466 ln
= skb_queue_len(&local
->pending
[i
]);
467 pos
+= scnprintf(pos
, end
- pos
, "[%i] %d\n",
471 rv
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, strlen(buf
));
476 static ssize_t
queues_read(struct file
*file
, char __user
*user_buf
,
477 size_t count
, loff_t
*ppos
)
479 struct ieee80211_local
*local
= file
->private_data
;
481 char buf
[IEEE80211_MAX_QUEUES
* 20];
484 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
485 for (q
= 0; q
< local
->hw
.queues
; q
++)
486 res
+= sprintf(buf
+ res
, "%02d: %#.8lx/%d\n", q
,
487 local
->queue_stop_reasons
[q
],
488 skb_queue_len(&local
->pending
[q
]));
489 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
491 return simple_read_from_buffer(user_buf
, count
, ppos
, buf
, res
);
494 DEBUGFS_READONLY_FILE_OPS(hwflags
);
495 DEBUGFS_READONLY_FILE_OPS(queues
);
496 DEBUGFS_READONLY_FILE_OPS(misc
);
498 /* statistics stuff */
500 static ssize_t
format_devstat_counter(struct ieee80211_local
*local
,
501 char __user
*userbuf
,
502 size_t count
, loff_t
*ppos
,
503 int (*printvalue
)(struct ieee80211_low_level_stats
*stats
, char *buf
,
506 struct ieee80211_low_level_stats stats
;
511 res
= drv_get_stats(local
, &stats
);
515 res
= printvalue(&stats
, buf
, sizeof(buf
));
516 return simple_read_from_buffer(userbuf
, count
, ppos
, buf
, res
);
519 #define DEBUGFS_DEVSTATS_FILE(name) \
520 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
521 char *buf, int buflen) \
523 return scnprintf(buf, buflen, "%u\n", stats->name); \
525 static ssize_t stats_ ##name## _read(struct file *file, \
526 char __user *userbuf, \
527 size_t count, loff_t *ppos) \
529 return format_devstat_counter(file->private_data, \
533 print_devstats_##name); \
536 static const struct file_operations stats_ ##name## _ops = { \
537 .read = stats_ ##name## _read, \
538 .open = simple_open, \
539 .llseek = generic_file_llseek, \
542 #define DEBUGFS_STATS_ADD(name) \
543 debugfs_create_u32(#name, 0400, statsd, &local->name);
544 #define DEBUGFS_DEVSTATS_ADD(name) \
545 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
547 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount
);
548 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount
);
549 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount
);
550 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount
);
552 void debugfs_hw_add(struct ieee80211_local
*local
)
554 struct dentry
*phyd
= local
->hw
.wiphy
->debugfsdir
;
555 struct dentry
*statsd
;
560 local
->debugfs
.keys
= debugfs_create_dir("keys", phyd
);
562 DEBUGFS_ADD(total_ps_buffered
);
564 DEBUGFS_ADD(rate_ctrl_alg
);
568 DEBUGFS_ADD_MODE(reset
, 0200);
570 DEBUGFS_ADD(hwflags
);
571 DEBUGFS_ADD(user_power
);
573 DEBUGFS_ADD(hw_conf
);
574 DEBUGFS_ADD_MODE(force_tx_status
, 0600);
576 if (local
->ops
->wake_tx_queue
)
577 DEBUGFS_ADD_MODE(aqm
, 0600);
579 DEBUGFS_ADD_MODE(airtime_flags
, 0600);
581 DEBUGFS_ADD(aql_txq_limit
);
582 debugfs_create_u32("aql_threshold", 0600,
583 phyd
, &local
->aql_threshold
);
585 statsd
= debugfs_create_dir("statistics", phyd
);
587 /* if the dir failed, don't put all the other things into the root! */
591 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
592 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount
);
593 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount
);
594 DEBUGFS_STATS_ADD(dot11FailedCount
);
595 DEBUGFS_STATS_ADD(dot11RetryCount
);
596 DEBUGFS_STATS_ADD(dot11MultipleRetryCount
);
597 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount
);
598 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount
);
599 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount
);
600 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount
);
601 DEBUGFS_STATS_ADD(tx_handlers_drop
);
602 DEBUGFS_STATS_ADD(tx_handlers_queued
);
603 DEBUGFS_STATS_ADD(tx_handlers_drop_wep
);
604 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc
);
605 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port
);
606 DEBUGFS_STATS_ADD(rx_handlers_drop
);
607 DEBUGFS_STATS_ADD(rx_handlers_queued
);
608 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc
);
609 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag
);
610 DEBUGFS_STATS_ADD(tx_expand_skb_head
);
611 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned
);
612 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag
);
613 DEBUGFS_STATS_ADD(rx_handlers_fragments
);
614 DEBUGFS_STATS_ADD(tx_status_drop
);
616 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount
);
617 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount
);
618 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount
);
619 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount
);