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, 2021-2024 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  	wiphy_lock(local->hw.wiphy);
292  	local->aql_txq_limit_low[ac] = q_limit_low;
293  	local->aql_txq_limit_high[ac] = q_limit_high;
294  
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  	wiphy_unlock(local->hw.wiphy);
304  
305  	return count;
306  }
307  
308  static const struct file_operations aql_txq_limit_ops = {
309  	.write = aql_txq_limit_write,
310  	.read = aql_txq_limit_read,
311  	.open = simple_open,
312  	.llseek = default_llseek,
313  };
314  
aql_enable_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)315  static ssize_t aql_enable_read(struct file *file, char __user *user_buf,
316  			       size_t count, loff_t *ppos)
317  {
318  	char buf[3];
319  	int len;
320  
321  	len = scnprintf(buf, sizeof(buf), "%d\n",
322  			!static_key_false(&aql_disable.key));
323  
324  	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
325  }
326  
aql_enable_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)327  static ssize_t aql_enable_write(struct file *file, const char __user *user_buf,
328  				size_t count, loff_t *ppos)
329  {
330  	bool aql_disabled = static_key_false(&aql_disable.key);
331  	char buf[3];
332  	size_t len;
333  
334  	if (count > sizeof(buf))
335  		return -EINVAL;
336  
337  	if (copy_from_user(buf, user_buf, count))
338  		return -EFAULT;
339  
340  	buf[sizeof(buf) - 1] = '\0';
341  	len = strlen(buf);
342  	if (len > 0 && buf[len - 1] == '\n')
343  		buf[len - 1] = 0;
344  
345  	if (buf[0] == '0' && buf[1] == '\0') {
346  		if (!aql_disabled)
347  			static_branch_inc(&aql_disable);
348  	} else if (buf[0] == '1' && buf[1] == '\0') {
349  		if (aql_disabled)
350  			static_branch_dec(&aql_disable);
351  	} else {
352  		return -EINVAL;
353  	}
354  
355  	return count;
356  }
357  
358  static const struct file_operations aql_enable_ops = {
359  	.write = aql_enable_write,
360  	.read = aql_enable_read,
361  	.open = simple_open,
362  	.llseek = default_llseek,
363  };
364  
force_tx_status_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)365  static ssize_t force_tx_status_read(struct file *file,
366  				    char __user *user_buf,
367  				    size_t count,
368  				    loff_t *ppos)
369  {
370  	struct ieee80211_local *local = file->private_data;
371  	char buf[3];
372  	int len = 0;
373  
374  	len = scnprintf(buf, sizeof(buf), "%d\n", (int)local->force_tx_status);
375  
376  	return simple_read_from_buffer(user_buf, count, ppos,
377  				       buf, len);
378  }
379  
force_tx_status_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)380  static ssize_t force_tx_status_write(struct file *file,
381  				     const char __user *user_buf,
382  				     size_t count,
383  				     loff_t *ppos)
384  {
385  	struct ieee80211_local *local = file->private_data;
386  	char buf[3];
387  
388  	if (count >= sizeof(buf))
389  		return -EINVAL;
390  
391  	if (copy_from_user(buf, user_buf, count))
392  		return -EFAULT;
393  
394  	if (count && buf[count - 1] == '\n')
395  		buf[count - 1] = '\0';
396  	else
397  		buf[count] = '\0';
398  
399  	if (buf[0] == '0' && buf[1] == '\0')
400  		local->force_tx_status = 0;
401  	else if (buf[0] == '1' && buf[1] == '\0')
402  		local->force_tx_status = 1;
403  	else
404  		return -EINVAL;
405  
406  	return count;
407  }
408  
409  static const struct file_operations force_tx_status_ops = {
410  	.write = force_tx_status_write,
411  	.read = force_tx_status_read,
412  	.open = simple_open,
413  	.llseek = default_llseek,
414  };
415  
416  #ifdef CONFIG_PM
reset_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)417  static ssize_t reset_write(struct file *file, const char __user *user_buf,
418  			   size_t count, loff_t *ppos)
419  {
420  	struct ieee80211_local *local = file->private_data;
421  	int ret;
422  
423  	rtnl_lock();
424  	wiphy_lock(local->hw.wiphy);
425  	__ieee80211_suspend(&local->hw, NULL);
426  	ret = __ieee80211_resume(&local->hw);
427  	wiphy_unlock(local->hw.wiphy);
428  
429  	if (ret)
430  		cfg80211_shutdown_all_interfaces(local->hw.wiphy);
431  
432  	rtnl_unlock();
433  
434  	return count;
435  }
436  
437  static const struct file_operations reset_ops = {
438  	.write = reset_write,
439  	.open = simple_open,
440  	.llseek = noop_llseek,
441  };
442  #endif
443  
444  static const char *hw_flag_names[] = {
445  #define FLAG(F)	[IEEE80211_HW_##F] = #F
446  	FLAG(HAS_RATE_CONTROL),
447  	FLAG(RX_INCLUDES_FCS),
448  	FLAG(HOST_BROADCAST_PS_BUFFERING),
449  	FLAG(SIGNAL_UNSPEC),
450  	FLAG(SIGNAL_DBM),
451  	FLAG(NEED_DTIM_BEFORE_ASSOC),
452  	FLAG(SPECTRUM_MGMT),
453  	FLAG(AMPDU_AGGREGATION),
454  	FLAG(SUPPORTS_PS),
455  	FLAG(PS_NULLFUNC_STACK),
456  	FLAG(SUPPORTS_DYNAMIC_PS),
457  	FLAG(MFP_CAPABLE),
458  	FLAG(WANT_MONITOR_VIF),
459  	FLAG(NO_AUTO_VIF),
460  	FLAG(SW_CRYPTO_CONTROL),
461  	FLAG(SUPPORT_FAST_XMIT),
462  	FLAG(REPORTS_TX_ACK_STATUS),
463  	FLAG(CONNECTION_MONITOR),
464  	FLAG(QUEUE_CONTROL),
465  	FLAG(SUPPORTS_PER_STA_GTK),
466  	FLAG(AP_LINK_PS),
467  	FLAG(TX_AMPDU_SETUP_IN_HW),
468  	FLAG(SUPPORTS_RC_TABLE),
469  	FLAG(P2P_DEV_ADDR_FOR_INTF),
470  	FLAG(TIMING_BEACON_ONLY),
471  	FLAG(SUPPORTS_HT_CCK_RATES),
472  	FLAG(CHANCTX_STA_CSA),
473  	FLAG(SUPPORTS_CLONED_SKBS),
474  	FLAG(SINGLE_SCAN_ON_ALL_BANDS),
475  	FLAG(TDLS_WIDER_BW),
476  	FLAG(SUPPORTS_AMSDU_IN_AMPDU),
477  	FLAG(BEACON_TX_STATUS),
478  	FLAG(NEEDS_UNIQUE_STA_ADDR),
479  	FLAG(SUPPORTS_REORDERING_BUFFER),
480  	FLAG(USES_RSS),
481  	FLAG(TX_AMSDU),
482  	FLAG(TX_FRAG_LIST),
483  	FLAG(REPORTS_LOW_ACK),
484  	FLAG(SUPPORTS_TX_FRAG),
485  	FLAG(SUPPORTS_TDLS_BUFFER_STA),
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  	FLAG(DISALLOW_PUNCTURING),
500  	FLAG(DISALLOW_PUNCTURING_5GHZ),
501  	FLAG(HANDLES_QUIET_CSA),
502  #undef FLAG
503  };
504  
hwflags_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)505  static ssize_t hwflags_read(struct file *file, char __user *user_buf,
506  			    size_t count, loff_t *ppos)
507  {
508  	struct ieee80211_local *local = file->private_data;
509  	size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
510  	char *buf = kzalloc(bufsz, GFP_KERNEL);
511  	char *pos = buf, *end = buf + bufsz - 1;
512  	ssize_t rv;
513  	int i;
514  
515  	if (!buf)
516  		return -ENOMEM;
517  
518  	/* fail compilation if somebody adds or removes
519  	 * a flag without updating the name array above
520  	 */
521  	BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
522  
523  	for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
524  		if (test_bit(i, local->hw.flags))
525  			pos += scnprintf(pos, end - pos, "%s\n",
526  					 hw_flag_names[i]);
527  	}
528  
529  	rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
530  	kfree(buf);
531  	return rv;
532  }
533  
misc_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)534  static ssize_t misc_read(struct file *file, char __user *user_buf,
535  			 size_t count, loff_t *ppos)
536  {
537  	struct ieee80211_local *local = file->private_data;
538  	/* Max len of each line is 16 characters, plus 9 for 'pending:\n' */
539  	size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9;
540  	char *buf;
541  	char *pos, *end;
542  	ssize_t rv;
543  	int i;
544  	int ln;
545  
546  	buf = kzalloc(bufsz, GFP_KERNEL);
547  	if (!buf)
548  		return -ENOMEM;
549  
550  	pos = buf;
551  	end = buf + bufsz - 1;
552  
553  	pos += scnprintf(pos, end - pos, "pending:\n");
554  
555  	for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
556  		ln = skb_queue_len(&local->pending[i]);
557  		pos += scnprintf(pos, end - pos, "[%i] %d\n",
558  				 i, ln);
559  	}
560  
561  	rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
562  	kfree(buf);
563  	return rv;
564  }
565  
queues_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)566  static ssize_t queues_read(struct file *file, char __user *user_buf,
567  			   size_t count, loff_t *ppos)
568  {
569  	struct ieee80211_local *local = file->private_data;
570  	unsigned long flags;
571  	char buf[IEEE80211_MAX_QUEUES * 20];
572  	int q, res = 0;
573  
574  	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
575  	for (q = 0; q < local->hw.queues; q++)
576  		res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
577  				local->queue_stop_reasons[q],
578  				skb_queue_len(&local->pending[q]));
579  	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
580  
581  	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
582  }
583  
584  DEBUGFS_READONLY_FILE_OPS(hwflags);
585  DEBUGFS_READONLY_FILE_OPS(queues);
586  DEBUGFS_READONLY_FILE_OPS(misc);
587  
588  /* statistics stuff */
589  
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))590  static ssize_t format_devstat_counter(struct ieee80211_local *local,
591  	char __user *userbuf,
592  	size_t count, loff_t *ppos,
593  	int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
594  			  int buflen))
595  {
596  	struct ieee80211_low_level_stats stats;
597  	char buf[20];
598  	int res;
599  
600  	wiphy_lock(local->hw.wiphy);
601  	res = drv_get_stats(local, &stats);
602  	wiphy_unlock(local->hw.wiphy);
603  	if (res)
604  		return res;
605  	res = printvalue(&stats, buf, sizeof(buf));
606  	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
607  }
608  
609  #define DEBUGFS_DEVSTATS_FILE(name)					\
610  static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
611  				 char *buf, int buflen)			\
612  {									\
613  	return scnprintf(buf, buflen, "%u\n", stats->name);		\
614  }									\
615  static ssize_t stats_ ##name## _read(struct file *file,			\
616  				     char __user *userbuf,		\
617  				     size_t count, loff_t *ppos)	\
618  {									\
619  	return format_devstat_counter(file->private_data,		\
620  				      userbuf,				\
621  				      count,				\
622  				      ppos,				\
623  				      print_devstats_##name);		\
624  }									\
625  									\
626  static const struct file_operations stats_ ##name## _ops = {		\
627  	.read = stats_ ##name## _read,					\
628  	.open = simple_open,						\
629  	.llseek = generic_file_llseek,					\
630  };
631  
632  #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
633  #define DEBUGFS_STATS_ADD(name)					\
634  	debugfs_create_u32(#name, 0400, statsd, &local->name);
635  #endif
636  #define DEBUGFS_DEVSTATS_ADD(name)					\
637  	debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
638  
639  DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
640  DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
641  DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
642  DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
643  
debugfs_hw_add(struct ieee80211_local * local)644  void debugfs_hw_add(struct ieee80211_local *local)
645  {
646  	struct dentry *phyd = local->hw.wiphy->debugfsdir;
647  	struct dentry *statsd;
648  
649  	if (!phyd)
650  		return;
651  
652  	local->debugfs.keys = debugfs_create_dir("keys", phyd);
653  
654  	DEBUGFS_ADD(total_ps_buffered);
655  	DEBUGFS_ADD(wep_iv);
656  	DEBUGFS_ADD(rate_ctrl_alg);
657  	DEBUGFS_ADD(queues);
658  	DEBUGFS_ADD(misc);
659  #ifdef CONFIG_PM
660  	DEBUGFS_ADD_MODE(reset, 0200);
661  #endif
662  	DEBUGFS_ADD(hwflags);
663  	DEBUGFS_ADD(user_power);
664  	DEBUGFS_ADD(power);
665  	DEBUGFS_ADD(hw_conf);
666  	DEBUGFS_ADD_MODE(force_tx_status, 0600);
667  	DEBUGFS_ADD_MODE(aql_enable, 0600);
668  	DEBUGFS_ADD(aql_pending);
669  	DEBUGFS_ADD_MODE(aqm, 0600);
670  
671  	DEBUGFS_ADD_MODE(airtime_flags, 0600);
672  
673  	DEBUGFS_ADD(aql_txq_limit);
674  	debugfs_create_u32("aql_threshold", 0600,
675  			   phyd, &local->aql_threshold);
676  
677  	statsd = debugfs_create_dir("statistics", phyd);
678  
679  #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
680  	DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
681  	DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
682  	DEBUGFS_STATS_ADD(dot11FailedCount);
683  	DEBUGFS_STATS_ADD(dot11RetryCount);
684  	DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
685  	DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
686  	DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
687  	DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
688  	DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
689  	DEBUGFS_STATS_ADD(tx_handlers_drop);
690  	DEBUGFS_STATS_ADD(tx_handlers_queued);
691  	DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
692  	DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
693  	DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
694  	DEBUGFS_STATS_ADD(rx_handlers_drop);
695  	DEBUGFS_STATS_ADD(rx_handlers_queued);
696  	DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
697  	DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
698  	DEBUGFS_STATS_ADD(tx_expand_skb_head);
699  	DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
700  	DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
701  	DEBUGFS_STATS_ADD(rx_handlers_fragments);
702  	DEBUGFS_STATS_ADD(tx_status_drop);
703  #endif
704  	DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
705  	DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
706  	DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
707  	DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
708  }
709