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Commit | Line | Data |
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e9f207f0 JB |
1 | /* |
2 | * mac80211 debugfs for wireless PHYs | |
3 | * | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
d98ad83e | 5 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
caf56338 | 6 | * Copyright (C) 2018 - 2019 Intel Corporation |
e9f207f0 JB |
7 | * |
8 | * GPLv2 | |
9 | * | |
10 | */ | |
11 | ||
12 | #include <linux/debugfs.h> | |
13 | #include <linux/rtnetlink.h> | |
9399b86c | 14 | #include <linux/vmalloc.h> |
e9f207f0 | 15 | #include "ieee80211_i.h" |
24487981 | 16 | #include "driver-ops.h" |
2c8dccc7 | 17 | #include "rate.h" |
e9f207f0 JB |
18 | #include "debugfs.h" |
19 | ||
07caf9d6 EP |
20 | #define DEBUGFS_FORMAT_BUFFER_SIZE 100 |
21 | ||
22 | int mac80211_format_buffer(char __user *userbuf, size_t count, | |
23 | loff_t *ppos, char *fmt, ...) | |
24 | { | |
25 | va_list args; | |
26 | char buf[DEBUGFS_FORMAT_BUFFER_SIZE]; | |
27 | int res; | |
28 | ||
29 | va_start(args, fmt); | |
30 | res = vscnprintf(buf, sizeof(buf), fmt, args); | |
31 | va_end(args); | |
32 | ||
33 | return simple_read_from_buffer(userbuf, count, ppos, buf, res); | |
34 | } | |
35 | ||
279daf64 | 36 | #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \ |
e9f207f0 JB |
37 | static ssize_t name## _read(struct file *file, char __user *userbuf, \ |
38 | size_t count, loff_t *ppos) \ | |
39 | { \ | |
40 | struct ieee80211_local *local = file->private_data; \ | |
e9f207f0 | 41 | \ |
07caf9d6 EP |
42 | return mac80211_format_buffer(userbuf, count, ppos, \ |
43 | fmt "\n", ##value); \ | |
279daf64 BG |
44 | } |
45 | ||
46 | #define DEBUGFS_READONLY_FILE_OPS(name) \ | |
e9f207f0 JB |
47 | static const struct file_operations name## _ops = { \ |
48 | .read = name## _read, \ | |
234e3405 | 49 | .open = simple_open, \ |
2b18ab36 | 50 | .llseek = generic_file_llseek, \ |
e9f207f0 JB |
51 | }; |
52 | ||
279daf64 BG |
53 | #define DEBUGFS_READONLY_FILE(name, fmt, value...) \ |
54 | DEBUGFS_READONLY_FILE_FN(name, fmt, value) \ | |
55 | DEBUGFS_READONLY_FILE_OPS(name) | |
56 | ||
e9f207f0 | 57 | #define DEBUGFS_ADD(name) \ |
7bcfaf2f | 58 | debugfs_create_file(#name, 0400, phyd, local, &name## _ops); |
e9f207f0 | 59 | |
827b1fb4 | 60 | #define DEBUGFS_ADD_MODE(name, mode) \ |
7bcfaf2f | 61 | debugfs_create_file(#name, mode, phyd, local, &name## _ops); |
e9f207f0 JB |
62 | |
63 | ||
83bdf2a1 BG |
64 | DEBUGFS_READONLY_FILE(user_power, "%d", |
65 | local->user_power_level); | |
66 | DEBUGFS_READONLY_FILE(power, "%d", | |
67 | local->hw.conf.power_level); | |
07caf9d6 | 68 | DEBUGFS_READONLY_FILE(total_ps_buffered, "%d", |
e9f207f0 | 69 | local->total_ps_buffered); |
07caf9d6 | 70 | DEBUGFS_READONLY_FILE(wep_iv, "%#08x", |
e9f207f0 | 71 | local->wep_iv & 0xffffff); |
07caf9d6 | 72 | DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s", |
af65cd96 | 73 | local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); |
3b5d665b | 74 | |
8d51dbb8 THJ |
75 | static ssize_t aqm_read(struct file *file, |
76 | char __user *user_buf, | |
77 | size_t count, | |
78 | loff_t *ppos) | |
9399b86c | 79 | { |
8d51dbb8 | 80 | struct ieee80211_local *local = file->private_data; |
9399b86c | 81 | struct fq *fq = &local->fq; |
8d51dbb8 | 82 | char buf[200]; |
9399b86c | 83 | int len = 0; |
9399b86c MK |
84 | |
85 | spin_lock_bh(&local->fq.lock); | |
86 | rcu_read_lock(); | |
87 | ||
8d51dbb8 THJ |
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" | |
2a4e675d | 93 | "R fq_overmemory %u\n" |
8d51dbb8 | 94 | "R fq_collisions %u\n" |
2a4e675d THJ |
95 | "R fq_memory_usage %u\n" |
96 | "RW fq_memory_limit %u\n" | |
8d51dbb8 THJ |
97 | "RW fq_limit %u\n" |
98 | "RW fq_quantum %u\n", | |
99 | fq->flows_cnt, | |
100 | fq->backlog, | |
2a4e675d | 101 | fq->overmemory, |
8d51dbb8 THJ |
102 | fq->overlimit, |
103 | fq->collisions, | |
2a4e675d THJ |
104 | fq->memory_usage, |
105 | fq->memory_limit, | |
8d51dbb8 THJ |
106 | fq->limit, |
107 | fq->quantum); | |
9399b86c MK |
108 | |
109 | rcu_read_unlock(); | |
110 | spin_unlock_bh(&local->fq.lock); | |
111 | ||
9399b86c | 112 | return simple_read_from_buffer(user_buf, count, ppos, |
8d51dbb8 | 113 | buf, len); |
9399b86c MK |
114 | } |
115 | ||
116 | static ssize_t aqm_write(struct file *file, | |
117 | const char __user *user_buf, | |
118 | size_t count, | |
119 | loff_t *ppos) | |
120 | { | |
8d51dbb8 | 121 | struct ieee80211_local *local = file->private_data; |
9399b86c MK |
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; | |
2a4e675d THJ |
138 | else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1) |
139 | return count; | |
9399b86c MK |
140 | else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1) |
141 | return count; | |
142 | ||
143 | return -EINVAL; | |
144 | } | |
145 | ||
146 | static const struct file_operations aqm_ops = { | |
147 | .write = aqm_write, | |
148 | .read = aqm_read, | |
8d51dbb8 | 149 | .open = simple_open, |
9399b86c MK |
150 | .llseek = default_llseek, |
151 | }; | |
152 | ||
2ad4814f | 153 | #ifdef CONFIG_PM |
827b1fb4 JB |
154 | static ssize_t reset_write(struct file *file, const char __user *user_buf, |
155 | size_t count, loff_t *ppos) | |
156 | { | |
157 | struct ieee80211_local *local = file->private_data; | |
158 | ||
159 | rtnl_lock(); | |
eecc4800 | 160 | __ieee80211_suspend(&local->hw, NULL); |
827b1fb4 JB |
161 | __ieee80211_resume(&local->hw); |
162 | rtnl_unlock(); | |
163 | ||
164 | return count; | |
165 | } | |
166 | ||
167 | static const struct file_operations reset_ops = { | |
168 | .write = reset_write, | |
234e3405 | 169 | .open = simple_open, |
6038f373 | 170 | .llseek = noop_llseek, |
827b1fb4 | 171 | }; |
2ad4814f | 172 | #endif |
827b1fb4 | 173 | |
68920c97 | 174 | static const char *hw_flag_names[] = { |
30686bf7 JB |
175 | #define FLAG(F) [IEEE80211_HW_##F] = #F |
176 | FLAG(HAS_RATE_CONTROL), | |
177 | FLAG(RX_INCLUDES_FCS), | |
178 | FLAG(HOST_BROADCAST_PS_BUFFERING), | |
179 | FLAG(SIGNAL_UNSPEC), | |
180 | FLAG(SIGNAL_DBM), | |
181 | FLAG(NEED_DTIM_BEFORE_ASSOC), | |
182 | FLAG(SPECTRUM_MGMT), | |
183 | FLAG(AMPDU_AGGREGATION), | |
184 | FLAG(SUPPORTS_PS), | |
185 | FLAG(PS_NULLFUNC_STACK), | |
186 | FLAG(SUPPORTS_DYNAMIC_PS), | |
187 | FLAG(MFP_CAPABLE), | |
188 | FLAG(WANT_MONITOR_VIF), | |
189 | FLAG(NO_AUTO_VIF), | |
190 | FLAG(SW_CRYPTO_CONTROL), | |
191 | FLAG(SUPPORT_FAST_XMIT), | |
192 | FLAG(REPORTS_TX_ACK_STATUS), | |
193 | FLAG(CONNECTION_MONITOR), | |
194 | FLAG(QUEUE_CONTROL), | |
195 | FLAG(SUPPORTS_PER_STA_GTK), | |
196 | FLAG(AP_LINK_PS), | |
197 | FLAG(TX_AMPDU_SETUP_IN_HW), | |
198 | FLAG(SUPPORTS_RC_TABLE), | |
199 | FLAG(P2P_DEV_ADDR_FOR_INTF), | |
200 | FLAG(TIMING_BEACON_ONLY), | |
201 | FLAG(SUPPORTS_HT_CCK_RATES), | |
202 | FLAG(CHANCTX_STA_CSA), | |
203 | FLAG(SUPPORTS_CLONED_SKBS), | |
204 | FLAG(SINGLE_SCAN_ON_ALL_BANDS), | |
b98fb44f | 205 | FLAG(TDLS_WIDER_BW), |
99e7ca44 | 206 | FLAG(SUPPORTS_AMSDU_IN_AMPDU), |
35afa588 | 207 | FLAG(BEACON_TX_STATUS), |
31104891 | 208 | FLAG(NEEDS_UNIQUE_STA_ADDR), |
412a6d80 | 209 | FLAG(SUPPORTS_REORDERING_BUFFER), |
c9c5962b | 210 | FLAG(USES_RSS), |
6e0456b5 FF |
211 | FLAG(TX_AMSDU), |
212 | FLAG(TX_FRAG_LIST), | |
e8a24cd4 | 213 | FLAG(REPORTS_LOW_ACK), |
f3fe4e93 | 214 | FLAG(SUPPORTS_TX_FRAG), |
e2fb1b83 | 215 | FLAG(SUPPORTS_TDLS_BUFFER_STA), |
94ba9271 | 216 | FLAG(DEAUTH_NEED_MGD_TX_PREP), |
7c181f4f | 217 | FLAG(DOESNT_SUPPORT_QOS_NDP), |
adf8ed01 | 218 | FLAG(BUFF_MMPDU_TXQ), |
09b4a4fa | 219 | FLAG(SUPPORTS_VHT_EXT_NSS_BW), |
0eeb2b67 | 220 | FLAG(STA_MMPDU_TXQ), |
77f7ffdc | 221 | FLAG(TX_STATUS_NO_AMPDU_LEN), |
caf56338 SS |
222 | FLAG(SUPPORTS_MULTI_BSSID), |
223 | FLAG(SUPPORTS_ONLY_HE_MULTI_BSSID), | |
30686bf7 JB |
224 | #undef FLAG |
225 | }; | |
226 | ||
279daf64 BG |
227 | static ssize_t hwflags_read(struct file *file, char __user *user_buf, |
228 | size_t count, loff_t *ppos) | |
229 | { | |
230 | struct ieee80211_local *local = file->private_data; | |
30686bf7 JB |
231 | size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS; |
232 | char *buf = kzalloc(bufsz, GFP_KERNEL); | |
233 | char *pos = buf, *end = buf + bufsz - 1; | |
279daf64 | 234 | ssize_t rv; |
30686bf7 | 235 | int i; |
279daf64 | 236 | |
d15b8459 | 237 | if (!buf) |
30686bf7 JB |
238 | return -ENOMEM; |
239 | ||
240 | /* fail compilation if somebody adds or removes | |
241 | * a flag without updating the name array above | |
242 | */ | |
68920c97 | 243 | BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS); |
30686bf7 JB |
244 | |
245 | for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) { | |
246 | if (test_bit(i, local->hw.flags)) | |
4633dfc3 | 247 | pos += scnprintf(pos, end - pos, "%s\n", |
30686bf7 JB |
248 | hw_flag_names[i]); |
249 | } | |
279daf64 BG |
250 | |
251 | rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); | |
252 | kfree(buf); | |
253 | return rv; | |
254 | } | |
199d69f2 | 255 | |
4a5eccaa BG |
256 | static ssize_t misc_read(struct file *file, char __user *user_buf, |
257 | size_t count, loff_t *ppos) | |
258 | { | |
259 | struct ieee80211_local *local = file->private_data; | |
260 | /* Max len of each line is 16 characters, plus 9 for 'pending:\n' */ | |
261 | size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9; | |
b2347a32 DC |
262 | char *buf; |
263 | char *pos, *end; | |
4a5eccaa BG |
264 | ssize_t rv; |
265 | int i; | |
266 | int ln; | |
267 | ||
b2347a32 DC |
268 | buf = kzalloc(bufsz, GFP_KERNEL); |
269 | if (!buf) | |
270 | return -ENOMEM; | |
271 | ||
272 | pos = buf; | |
273 | end = buf + bufsz - 1; | |
274 | ||
4a5eccaa BG |
275 | pos += scnprintf(pos, end - pos, "pending:\n"); |
276 | ||
277 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
278 | ln = skb_queue_len(&local->pending[i]); | |
279 | pos += scnprintf(pos, end - pos, "[%i] %d\n", | |
280 | i, ln); | |
281 | } | |
282 | ||
283 | rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); | |
284 | kfree(buf); | |
285 | return rv; | |
286 | } | |
287 | ||
db2e6bd4 JB |
288 | static ssize_t queues_read(struct file *file, char __user *user_buf, |
289 | size_t count, loff_t *ppos) | |
290 | { | |
291 | struct ieee80211_local *local = file->private_data; | |
292 | unsigned long flags; | |
293 | char buf[IEEE80211_MAX_QUEUES * 20]; | |
294 | int q, res = 0; | |
295 | ||
296 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
297 | for (q = 0; q < local->hw.queues; q++) | |
298 | res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, | |
299 | local->queue_stop_reasons[q], | |
3b8d81e0 | 300 | skb_queue_len(&local->pending[q])); |
db2e6bd4 JB |
301 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
302 | ||
303 | return simple_read_from_buffer(user_buf, count, ppos, buf, res); | |
304 | } | |
305 | ||
279daf64 | 306 | DEBUGFS_READONLY_FILE_OPS(hwflags); |
279daf64 | 307 | DEBUGFS_READONLY_FILE_OPS(queues); |
4a5eccaa | 308 | DEBUGFS_READONLY_FILE_OPS(misc); |
db2e6bd4 | 309 | |
e9f207f0 JB |
310 | /* statistics stuff */ |
311 | ||
e9f207f0 JB |
312 | static ssize_t format_devstat_counter(struct ieee80211_local *local, |
313 | char __user *userbuf, | |
314 | size_t count, loff_t *ppos, | |
315 | int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, | |
316 | int buflen)) | |
317 | { | |
318 | struct ieee80211_low_level_stats stats; | |
319 | char buf[20]; | |
320 | int res; | |
321 | ||
75636525 | 322 | rtnl_lock(); |
24487981 | 323 | res = drv_get_stats(local, &stats); |
e9f207f0 | 324 | rtnl_unlock(); |
24487981 JB |
325 | if (res) |
326 | return res; | |
327 | res = printvalue(&stats, buf, sizeof(buf)); | |
e9f207f0 JB |
328 | return simple_read_from_buffer(userbuf, count, ppos, buf, res); |
329 | } | |
330 | ||
331 | #define DEBUGFS_DEVSTATS_FILE(name) \ | |
332 | static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ | |
333 | char *buf, int buflen) \ | |
334 | { \ | |
335 | return scnprintf(buf, buflen, "%u\n", stats->name); \ | |
336 | } \ | |
337 | static ssize_t stats_ ##name## _read(struct file *file, \ | |
338 | char __user *userbuf, \ | |
339 | size_t count, loff_t *ppos) \ | |
340 | { \ | |
341 | return format_devstat_counter(file->private_data, \ | |
342 | userbuf, \ | |
343 | count, \ | |
344 | ppos, \ | |
345 | print_devstats_##name); \ | |
346 | } \ | |
347 | \ | |
348 | static const struct file_operations stats_ ##name## _ops = { \ | |
349 | .read = stats_ ##name## _read, \ | |
234e3405 | 350 | .open = simple_open, \ |
2b18ab36 | 351 | .llseek = generic_file_llseek, \ |
e9f207f0 JB |
352 | }; |
353 | ||
f1160434 JB |
354 | #define DEBUGFS_STATS_ADD(name) \ |
355 | debugfs_create_u32(#name, 0400, statsd, &local->name); | |
2826bcd8 | 356 | #define DEBUGFS_DEVSTATS_ADD(name) \ |
7bcfaf2f | 357 | debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); |
e9f207f0 | 358 | |
e9f207f0 JB |
359 | DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); |
360 | DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); | |
361 | DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); | |
362 | DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); | |
363 | ||
e9f207f0 JB |
364 | void debugfs_hw_add(struct ieee80211_local *local) |
365 | { | |
366 | struct dentry *phyd = local->hw.wiphy->debugfsdir; | |
367 | struct dentry *statsd; | |
368 | ||
369 | if (!phyd) | |
370 | return; | |
371 | ||
e9f207f0 JB |
372 | local->debugfs.keys = debugfs_create_dir("keys", phyd); |
373 | ||
e9f207f0 | 374 | DEBUGFS_ADD(total_ps_buffered); |
e9f207f0 | 375 | DEBUGFS_ADD(wep_iv); |
bddb2afc | 376 | DEBUGFS_ADD(rate_ctrl_alg); |
db2e6bd4 | 377 | DEBUGFS_ADD(queues); |
4a5eccaa | 378 | DEBUGFS_ADD(misc); |
2ad4814f | 379 | #ifdef CONFIG_PM |
827b1fb4 | 380 | DEBUGFS_ADD_MODE(reset, 0200); |
2ad4814f | 381 | #endif |
279daf64 | 382 | DEBUGFS_ADD(hwflags); |
83bdf2a1 BG |
383 | DEBUGFS_ADD(user_power); |
384 | DEBUGFS_ADD(power); | |
8d51dbb8 THJ |
385 | |
386 | if (local->ops->wake_tx_queue) | |
387 | DEBUGFS_ADD_MODE(aqm, 0600); | |
e9f207f0 | 388 | |
b4809e94 THJ |
389 | debugfs_create_u16("airtime_flags", 0600, |
390 | phyd, &local->airtime_flags); | |
391 | ||
e9f207f0 | 392 | statsd = debugfs_create_dir("statistics", phyd); |
e9f207f0 JB |
393 | |
394 | /* if the dir failed, don't put all the other things into the root! */ | |
395 | if (!statsd) | |
396 | return; | |
397 | ||
c206ca67 | 398 | #ifdef CONFIG_MAC80211_DEBUG_COUNTERS |
f1160434 JB |
399 | DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount); |
400 | DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount); | |
401 | DEBUGFS_STATS_ADD(dot11FailedCount); | |
402 | DEBUGFS_STATS_ADD(dot11RetryCount); | |
403 | DEBUGFS_STATS_ADD(dot11MultipleRetryCount); | |
404 | DEBUGFS_STATS_ADD(dot11FrameDuplicateCount); | |
405 | DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount); | |
406 | DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount); | |
407 | DEBUGFS_STATS_ADD(dot11TransmittedFrameCount); | |
f1160434 JB |
408 | DEBUGFS_STATS_ADD(tx_handlers_drop); |
409 | DEBUGFS_STATS_ADD(tx_handlers_queued); | |
410 | DEBUGFS_STATS_ADD(tx_handlers_drop_wep); | |
411 | DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc); | |
412 | DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port); | |
413 | DEBUGFS_STATS_ADD(rx_handlers_drop); | |
414 | DEBUGFS_STATS_ADD(rx_handlers_queued); | |
415 | DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc); | |
416 | DEBUGFS_STATS_ADD(rx_handlers_drop_defrag); | |
f1160434 JB |
417 | DEBUGFS_STATS_ADD(tx_expand_skb_head); |
418 | DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned); | |
419 | DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag); | |
420 | DEBUGFS_STATS_ADD(rx_handlers_fragments); | |
421 | DEBUGFS_STATS_ADD(tx_status_drop); | |
e9f207f0 | 422 | #endif |
2826bcd8 FF |
423 | DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); |
424 | DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); | |
425 | DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); | |
426 | DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); | |
e9f207f0 | 427 | } |