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, 2021-2022 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 
mac80211_format_buffer(char __user * userbuf,size_t count,loff_t * ppos,char * fmt,...)20 int 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...)			\
35 static 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)			\
45 static 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 
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");
74 
aqm_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)75 static 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 
aqm_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)116 static 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 
124 	if (count >= sizeof(buf))
125 		return -EINVAL;
126 
127 	if (copy_from_user(buf, user_buf, count))
128 		return -EFAULT;
129 
130 	if (count && buf[count - 1] == '\n')
131 		buf[count - 1] = '\0';
132 	else
133 		buf[count] = '\0';
134 
135 	if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1)
136 		return count;
137 	else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1)
138 		return count;
139 	else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1)
140 		return count;
141 
142 	return -EINVAL;
143 }
144 
145 static const struct file_operations aqm_ops = {
146 	.write = aqm_write,
147 	.read = aqm_read,
148 	.open = simple_open,
149 	.llseek = default_llseek,
150 };
151 
airtime_flags_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)152 static ssize_t airtime_flags_read(struct file *file,
153 				  char __user *user_buf,
154 				  size_t count, loff_t *ppos)
155 {
156 	struct ieee80211_local *local = file->private_data;
157 	char buf[128] = {}, *pos, *end;
158 
159 	pos = buf;
160 	end = pos + sizeof(buf) - 1;
161 
162 	if (local->airtime_flags & AIRTIME_USE_TX)
163 		pos += scnprintf(pos, end - pos, "AIRTIME_TX\t(%lx)\n",
164 				 AIRTIME_USE_TX);
165 	if (local->airtime_flags & AIRTIME_USE_RX)
166 		pos += scnprintf(pos, end - pos, "AIRTIME_RX\t(%lx)\n",
167 				 AIRTIME_USE_RX);
168 
169 	return simple_read_from_buffer(user_buf, count, ppos, buf,
170 				       strlen(buf));
171 }
172 
airtime_flags_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)173 static ssize_t airtime_flags_write(struct file *file,
174 				   const char __user *user_buf,
175 				   size_t count, loff_t *ppos)
176 {
177 	struct ieee80211_local *local = file->private_data;
178 	char buf[16];
179 
180 	if (count >= sizeof(buf))
181 		return -EINVAL;
182 
183 	if (copy_from_user(buf, user_buf, count))
184 		return -EFAULT;
185 
186 	if (count && buf[count - 1] == '\n')
187 		buf[count - 1] = '\0';
188 	else
189 		buf[count] = '\0';
190 
191 	if (kstrtou16(buf, 0, &local->airtime_flags))
192 		return -EINVAL;
193 
194 	return count;
195 }
196 
197 static const struct file_operations airtime_flags_ops = {
198 	.write = airtime_flags_write,
199 	.read = airtime_flags_read,
200 	.open = simple_open,
201 	.llseek = default_llseek,
202 };
203 
aql_pending_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)204 static ssize_t aql_pending_read(struct file *file,
205 				char __user *user_buf,
206 				size_t count, loff_t *ppos)
207 {
208 	struct ieee80211_local *local = file->private_data;
209 	char buf[400];
210 	int len = 0;
211 
212 	len = scnprintf(buf, sizeof(buf),
213 			"AC     AQL pending\n"
214 			"VO     %u us\n"
215 			"VI     %u us\n"
216 			"BE     %u us\n"
217 			"BK     %u us\n"
218 			"total  %u us\n",
219 			atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_VO]),
220 			atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_VI]),
221 			atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_BE]),
222 			atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_BK]),
223 			atomic_read(&local->aql_total_pending_airtime));
224 	return simple_read_from_buffer(user_buf, count, ppos,
225 				       buf, len);
226 }
227 
228 static const struct file_operations aql_pending_ops = {
229 	.read = aql_pending_read,
230 	.open = simple_open,
231 	.llseek = default_llseek,
232 };
233 
aql_txq_limit_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)234 static ssize_t aql_txq_limit_read(struct file *file,
235 				  char __user *user_buf,
236 				  size_t count,
237 				  loff_t *ppos)
238 {
239 	struct ieee80211_local *local = file->private_data;
240 	char buf[400];
241 	int len = 0;
242 
243 	len = scnprintf(buf, sizeof(buf),
244 			"AC	AQL limit low	AQL limit high\n"
245 			"VO	%u		%u\n"
246 			"VI	%u		%u\n"
247 			"BE	%u		%u\n"
248 			"BK	%u		%u\n",
249 			local->aql_txq_limit_low[IEEE80211_AC_VO],
250 			local->aql_txq_limit_high[IEEE80211_AC_VO],
251 			local->aql_txq_limit_low[IEEE80211_AC_VI],
252 			local->aql_txq_limit_high[IEEE80211_AC_VI],
253 			local->aql_txq_limit_low[IEEE80211_AC_BE],
254 			local->aql_txq_limit_high[IEEE80211_AC_BE],
255 			local->aql_txq_limit_low[IEEE80211_AC_BK],
256 			local->aql_txq_limit_high[IEEE80211_AC_BK]);
257 	return simple_read_from_buffer(user_buf, count, ppos,
258 				       buf, len);
259 }
260 
aql_txq_limit_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)261 static ssize_t aql_txq_limit_write(struct file *file,
262 				   const char __user *user_buf,
263 				   size_t count,
264 				   loff_t *ppos)
265 {
266 	struct ieee80211_local *local = file->private_data;
267 	char buf[100];
268 	u32 ac, q_limit_low, q_limit_high, q_limit_low_old, q_limit_high_old;
269 	struct sta_info *sta;
270 
271 	if (count >= sizeof(buf))
272 		return -EINVAL;
273 
274 	if (copy_from_user(buf, user_buf, count))
275 		return -EFAULT;
276 
277 	if (count && buf[count - 1] == '\n')
278 		buf[count - 1] = '\0';
279 	else
280 		buf[count] = '\0';
281 
282 	if (sscanf(buf, "%u %u %u", &ac, &q_limit_low, &q_limit_high) != 3)
283 		return -EINVAL;
284 
285 	if (ac >= IEEE80211_NUM_ACS)
286 		return -EINVAL;
287 
288 	q_limit_low_old = local->aql_txq_limit_low[ac];
289 	q_limit_high_old = local->aql_txq_limit_high[ac];
290 
291 	local->aql_txq_limit_low[ac] = q_limit_low;
292 	local->aql_txq_limit_high[ac] = q_limit_high;
293 
294 	mutex_lock(&local->sta_mtx);
295 	list_for_each_entry(sta, &local->sta_list, list) {
296 		/* If a sta has customized queue limits, keep it */
297 		if (sta->airtime[ac].aql_limit_low == q_limit_low_old &&
298 		    sta->airtime[ac].aql_limit_high == q_limit_high_old) {
299 			sta->airtime[ac].aql_limit_low = q_limit_low;
300 			sta->airtime[ac].aql_limit_high = q_limit_high;
301 		}
302 	}
303 	mutex_unlock(&local->sta_mtx);
304 	return count;
305 }
306 
307 static const struct file_operations aql_txq_limit_ops = {
308 	.write = aql_txq_limit_write,
309 	.read = aql_txq_limit_read,
310 	.open = simple_open,
311 	.llseek = default_llseek,
312 };
313 
aql_enable_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)314 static ssize_t aql_enable_read(struct file *file, char __user *user_buf,
315 			       size_t count, loff_t *ppos)
316 {
317 	char buf[3];
318 	int len;
319 
320 	len = scnprintf(buf, sizeof(buf), "%d\n",
321 			!static_key_false(&aql_disable.key));
322 
323 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
324 }
325 
aql_enable_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)326 static ssize_t aql_enable_write(struct file *file, const char __user *user_buf,
327 				size_t count, loff_t *ppos)
328 {
329 	bool aql_disabled = static_key_false(&aql_disable.key);
330 	char buf[3];
331 	size_t len;
332 
333 	if (count > sizeof(buf))
334 		return -EINVAL;
335 
336 	if (copy_from_user(buf, user_buf, count))
337 		return -EFAULT;
338 
339 	buf[sizeof(buf) - 1] = '\0';
340 	len = strlen(buf);
341 	if (len > 0 && buf[len - 1] == '\n')
342 		buf[len - 1] = 0;
343 
344 	if (buf[0] == '0' && buf[1] == '\0') {
345 		if (!aql_disabled)
346 			static_branch_inc(&aql_disable);
347 	} else if (buf[0] == '1' && buf[1] == '\0') {
348 		if (aql_disabled)
349 			static_branch_dec(&aql_disable);
350 	} else {
351 		return -EINVAL;
352 	}
353 
354 	return count;
355 }
356 
357 static const struct file_operations aql_enable_ops = {
358 	.write = aql_enable_write,
359 	.read = aql_enable_read,
360 	.open = simple_open,
361 	.llseek = default_llseek,
362 };
363 
force_tx_status_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)364 static ssize_t force_tx_status_read(struct file *file,
365 				    char __user *user_buf,
366 				    size_t count,
367 				    loff_t *ppos)
368 {
369 	struct ieee80211_local *local = file->private_data;
370 	char buf[3];
371 	int len = 0;
372 
373 	len = scnprintf(buf, sizeof(buf), "%d\n", (int)local->force_tx_status);
374 
375 	return simple_read_from_buffer(user_buf, count, ppos,
376 				       buf, len);
377 }
378 
force_tx_status_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)379 static ssize_t force_tx_status_write(struct file *file,
380 				     const char __user *user_buf,
381 				     size_t count,
382 				     loff_t *ppos)
383 {
384 	struct ieee80211_local *local = file->private_data;
385 	char buf[3];
386 
387 	if (count >= sizeof(buf))
388 		return -EINVAL;
389 
390 	if (copy_from_user(buf, user_buf, count))
391 		return -EFAULT;
392 
393 	if (count && buf[count - 1] == '\n')
394 		buf[count - 1] = '\0';
395 	else
396 		buf[count] = '\0';
397 
398 	if (buf[0] == '0' && buf[1] == '\0')
399 		local->force_tx_status = 0;
400 	else if (buf[0] == '1' && buf[1] == '\0')
401 		local->force_tx_status = 1;
402 	else
403 		return -EINVAL;
404 
405 	return count;
406 }
407 
408 static const struct file_operations force_tx_status_ops = {
409 	.write = force_tx_status_write,
410 	.read = force_tx_status_read,
411 	.open = simple_open,
412 	.llseek = default_llseek,
413 };
414 
415 #ifdef CONFIG_PM
reset_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)416 static ssize_t reset_write(struct file *file, const char __user *user_buf,
417 			   size_t count, loff_t *ppos)
418 {
419 	struct ieee80211_local *local = file->private_data;
420 	int ret;
421 
422 	rtnl_lock();
423 	wiphy_lock(local->hw.wiphy);
424 	__ieee80211_suspend(&local->hw, NULL);
425 	ret = __ieee80211_resume(&local->hw);
426 	wiphy_unlock(local->hw.wiphy);
427 
428 	if (ret)
429 		cfg80211_shutdown_all_interfaces(local->hw.wiphy);
430 
431 	rtnl_unlock();
432 
433 	return count;
434 }
435 
436 static const struct file_operations reset_ops = {
437 	.write = reset_write,
438 	.open = simple_open,
439 	.llseek = noop_llseek,
440 };
441 #endif
442 
443 static const char *hw_flag_names[] = {
444 #define FLAG(F)	[IEEE80211_HW_##F] = #F
445 	FLAG(HAS_RATE_CONTROL),
446 	FLAG(RX_INCLUDES_FCS),
447 	FLAG(HOST_BROADCAST_PS_BUFFERING),
448 	FLAG(SIGNAL_UNSPEC),
449 	FLAG(SIGNAL_DBM),
450 	FLAG(NEED_DTIM_BEFORE_ASSOC),
451 	FLAG(SPECTRUM_MGMT),
452 	FLAG(AMPDU_AGGREGATION),
453 	FLAG(SUPPORTS_PS),
454 	FLAG(PS_NULLFUNC_STACK),
455 	FLAG(SUPPORTS_DYNAMIC_PS),
456 	FLAG(MFP_CAPABLE),
457 	FLAG(WANT_MONITOR_VIF),
458 	FLAG(NO_AUTO_VIF),
459 	FLAG(SW_CRYPTO_CONTROL),
460 	FLAG(SUPPORT_FAST_XMIT),
461 	FLAG(REPORTS_TX_ACK_STATUS),
462 	FLAG(CONNECTION_MONITOR),
463 	FLAG(QUEUE_CONTROL),
464 	FLAG(SUPPORTS_PER_STA_GTK),
465 	FLAG(AP_LINK_PS),
466 	FLAG(TX_AMPDU_SETUP_IN_HW),
467 	FLAG(SUPPORTS_RC_TABLE),
468 	FLAG(P2P_DEV_ADDR_FOR_INTF),
469 	FLAG(TIMING_BEACON_ONLY),
470 	FLAG(SUPPORTS_HT_CCK_RATES),
471 	FLAG(CHANCTX_STA_CSA),
472 	FLAG(SUPPORTS_CLONED_SKBS),
473 	FLAG(SINGLE_SCAN_ON_ALL_BANDS),
474 	FLAG(TDLS_WIDER_BW),
475 	FLAG(SUPPORTS_AMSDU_IN_AMPDU),
476 	FLAG(BEACON_TX_STATUS),
477 	FLAG(NEEDS_UNIQUE_STA_ADDR),
478 	FLAG(SUPPORTS_REORDERING_BUFFER),
479 	FLAG(USES_RSS),
480 	FLAG(TX_AMSDU),
481 	FLAG(TX_FRAG_LIST),
482 	FLAG(REPORTS_LOW_ACK),
483 	FLAG(SUPPORTS_TX_FRAG),
484 	FLAG(SUPPORTS_TDLS_BUFFER_STA),
485 	FLAG(DEAUTH_NEED_MGD_TX_PREP),
486 	FLAG(DOESNT_SUPPORT_QOS_NDP),
487 	FLAG(BUFF_MMPDU_TXQ),
488 	FLAG(SUPPORTS_VHT_EXT_NSS_BW),
489 	FLAG(STA_MMPDU_TXQ),
490 	FLAG(TX_STATUS_NO_AMPDU_LEN),
491 	FLAG(SUPPORTS_MULTI_BSSID),
492 	FLAG(SUPPORTS_ONLY_HE_MULTI_BSSID),
493 	FLAG(AMPDU_KEYBORDER_SUPPORT),
494 	FLAG(SUPPORTS_TX_ENCAP_OFFLOAD),
495 	FLAG(SUPPORTS_RX_DECAP_OFFLOAD),
496 	FLAG(SUPPORTS_CONC_MON_RX_DECAP),
497 	FLAG(DETECTS_COLOR_COLLISION),
498 	FLAG(MLO_MCAST_MULTI_LINK_TX),
499 #undef FLAG
500 };
501 
hwflags_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)502 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
503 			    size_t count, loff_t *ppos)
504 {
505 	struct ieee80211_local *local = file->private_data;
506 	size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
507 	char *buf = kzalloc(bufsz, GFP_KERNEL);
508 	char *pos = buf, *end = buf + bufsz - 1;
509 	ssize_t rv;
510 	int i;
511 
512 	if (!buf)
513 		return -ENOMEM;
514 
515 	/* fail compilation if somebody adds or removes
516 	 * a flag without updating the name array above
517 	 */
518 	BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
519 
520 	for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
521 		if (test_bit(i, local->hw.flags))
522 			pos += scnprintf(pos, end - pos, "%s\n",
523 					 hw_flag_names[i]);
524 	}
525 
526 	rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
527 	kfree(buf);
528 	return rv;
529 }
530 
misc_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)531 static ssize_t misc_read(struct file *file, char __user *user_buf,
532 			 size_t count, loff_t *ppos)
533 {
534 	struct ieee80211_local *local = file->private_data;
535 	/* Max len of each line is 16 characters, plus 9 for 'pending:\n' */
536 	size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9;
537 	char *buf;
538 	char *pos, *end;
539 	ssize_t rv;
540 	int i;
541 	int ln;
542 
543 	buf = kzalloc(bufsz, GFP_KERNEL);
544 	if (!buf)
545 		return -ENOMEM;
546 
547 	pos = buf;
548 	end = buf + bufsz - 1;
549 
550 	pos += scnprintf(pos, end - pos, "pending:\n");
551 
552 	for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
553 		ln = skb_queue_len(&local->pending[i]);
554 		pos += scnprintf(pos, end - pos, "[%i] %d\n",
555 				 i, ln);
556 	}
557 
558 	rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
559 	kfree(buf);
560 	return rv;
561 }
562 
queues_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)563 static ssize_t queues_read(struct file *file, char __user *user_buf,
564 			   size_t count, loff_t *ppos)
565 {
566 	struct ieee80211_local *local = file->private_data;
567 	unsigned long flags;
568 	char buf[IEEE80211_MAX_QUEUES * 20];
569 	int q, res = 0;
570 
571 	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
572 	for (q = 0; q < local->hw.queues; q++)
573 		res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
574 				local->queue_stop_reasons[q],
575 				skb_queue_len(&local->pending[q]));
576 	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
577 
578 	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
579 }
580 
581 DEBUGFS_READONLY_FILE_OPS(hwflags);
582 DEBUGFS_READONLY_FILE_OPS(queues);
583 DEBUGFS_READONLY_FILE_OPS(misc);
584 
585 /* statistics stuff */
586 
format_devstat_counter(struct ieee80211_local * local,char __user * userbuf,size_t count,loff_t * ppos,int (* printvalue)(struct ieee80211_low_level_stats * stats,char * buf,int buflen))587 static ssize_t format_devstat_counter(struct ieee80211_local *local,
588 	char __user *userbuf,
589 	size_t count, loff_t *ppos,
590 	int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
591 			  int buflen))
592 {
593 	struct ieee80211_low_level_stats stats;
594 	char buf[20];
595 	int res;
596 
597 	rtnl_lock();
598 	res = drv_get_stats(local, &stats);
599 	rtnl_unlock();
600 	if (res)
601 		return res;
602 	res = printvalue(&stats, buf, sizeof(buf));
603 	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
604 }
605 
606 #define DEBUGFS_DEVSTATS_FILE(name)					\
607 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
608 				 char *buf, int buflen)			\
609 {									\
610 	return scnprintf(buf, buflen, "%u\n", stats->name);		\
611 }									\
612 static ssize_t stats_ ##name## _read(struct file *file,			\
613 				     char __user *userbuf,		\
614 				     size_t count, loff_t *ppos)	\
615 {									\
616 	return format_devstat_counter(file->private_data,		\
617 				      userbuf,				\
618 				      count,				\
619 				      ppos,				\
620 				      print_devstats_##name);		\
621 }									\
622 									\
623 static const struct file_operations stats_ ##name## _ops = {		\
624 	.read = stats_ ##name## _read,					\
625 	.open = simple_open,						\
626 	.llseek = generic_file_llseek,					\
627 };
628 
629 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
630 #define DEBUGFS_STATS_ADD(name)					\
631 	debugfs_create_u32(#name, 0400, statsd, &local->name);
632 #endif
633 #define DEBUGFS_DEVSTATS_ADD(name)					\
634 	debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
635 
636 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
637 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
638 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
639 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
640 
debugfs_hw_add(struct ieee80211_local * local)641 void debugfs_hw_add(struct ieee80211_local *local)
642 {
643 	struct dentry *phyd = local->hw.wiphy->debugfsdir;
644 	struct dentry *statsd;
645 
646 	if (!phyd)
647 		return;
648 
649 	local->debugfs.keys = debugfs_create_dir("keys", phyd);
650 
651 	DEBUGFS_ADD(total_ps_buffered);
652 	DEBUGFS_ADD(wep_iv);
653 	DEBUGFS_ADD(rate_ctrl_alg);
654 	DEBUGFS_ADD(queues);
655 	DEBUGFS_ADD(misc);
656 #ifdef CONFIG_PM
657 	DEBUGFS_ADD_MODE(reset, 0200);
658 #endif
659 	DEBUGFS_ADD(hwflags);
660 	DEBUGFS_ADD(user_power);
661 	DEBUGFS_ADD(power);
662 	DEBUGFS_ADD(hw_conf);
663 	DEBUGFS_ADD_MODE(force_tx_status, 0600);
664 	DEBUGFS_ADD_MODE(aql_enable, 0600);
665 	DEBUGFS_ADD(aql_pending);
666 	DEBUGFS_ADD_MODE(aqm, 0600);
667 
668 	DEBUGFS_ADD_MODE(airtime_flags, 0600);
669 
670 	DEBUGFS_ADD(aql_txq_limit);
671 	debugfs_create_u32("aql_threshold", 0600,
672 			   phyd, &local->aql_threshold);
673 
674 	statsd = debugfs_create_dir("statistics", phyd);
675 
676 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
677 	DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
678 	DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
679 	DEBUGFS_STATS_ADD(dot11FailedCount);
680 	DEBUGFS_STATS_ADD(dot11RetryCount);
681 	DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
682 	DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
683 	DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
684 	DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
685 	DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
686 	DEBUGFS_STATS_ADD(tx_handlers_drop);
687 	DEBUGFS_STATS_ADD(tx_handlers_queued);
688 	DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
689 	DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
690 	DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
691 	DEBUGFS_STATS_ADD(rx_handlers_drop);
692 	DEBUGFS_STATS_ADD(rx_handlers_queued);
693 	DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
694 	DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
695 	DEBUGFS_STATS_ADD(tx_expand_skb_head);
696 	DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
697 	DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
698 	DEBUGFS_STATS_ADD(rx_handlers_fragments);
699 	DEBUGFS_STATS_ADD(tx_status_drop);
700 #endif
701 	DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
702 	DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
703 	DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
704 	DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
705 }
706