Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 <linux/vmalloc.h>
14#include "ieee80211_i.h"
15#include "driver-ops.h"
16#include "rate.h"
17#include "debugfs.h"
18
19#define DEBUGFS_FORMAT_BUFFER_SIZE 100
20
21int mac80211_format_buffer(char __user *userbuf, size_t count,
22 loff_t *ppos, char *fmt, ...)
23{
24 va_list args;
25 char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
26 int res;
27
28 va_start(args, fmt);
29 res = vscnprintf(buf, sizeof(buf), fmt, args);
30 va_end(args);
31
32 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
33}
34
35#define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \
36static ssize_t name## _read(struct file *file, char __user *userbuf, \
37 size_t count, loff_t *ppos) \
38{ \
39 struct ieee80211_local *local = file->private_data; \
40 \
41 return mac80211_format_buffer(userbuf, count, ppos, \
42 fmt "\n", ##value); \
43}
44
45#define DEBUGFS_READONLY_FILE_OPS(name) \
46static const struct file_operations name## _ops = { \
47 .read = name## _read, \
48 .open = simple_open, \
49 .llseek = generic_file_llseek, \
50};
51
52#define DEBUGFS_READONLY_FILE(name, fmt, value...) \
53 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \
54 DEBUGFS_READONLY_FILE_OPS(name)
55
56#define DEBUGFS_ADD(name) \
57 debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
58
59#define DEBUGFS_ADD_MODE(name, mode) \
60 debugfs_create_file(#name, mode, phyd, local, &name## _ops);
61
62
63DEBUGFS_READONLY_FILE(user_power, "%d",
64 local->user_power_level);
65DEBUGFS_READONLY_FILE(power, "%d",
66 local->hw.conf.power_level);
67DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
68 local->total_ps_buffered);
69DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
70 local->wep_iv & 0xffffff);
71DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
72 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
73
74static ssize_t aqm_read(struct file *file,
75 char __user *user_buf,
76 size_t count,
77 loff_t *ppos)
78{
79 struct ieee80211_local *local = file->private_data;
80 struct fq *fq = &local->fq;
81 char buf[200];
82 int len = 0;
83
84 spin_lock_bh(&local->fq.lock);
85 rcu_read_lock();
86
87 len = scnprintf(buf, sizeof(buf),
88 "access name value\n"
89 "R fq_flows_cnt %u\n"
90 "R fq_backlog %u\n"
91 "R fq_overlimit %u\n"
92 "R fq_overmemory %u\n"
93 "R fq_collisions %u\n"
94 "R fq_memory_usage %u\n"
95 "RW fq_memory_limit %u\n"
96 "RW fq_limit %u\n"
97 "RW fq_quantum %u\n",
98 fq->flows_cnt,
99 fq->backlog,
100 fq->overmemory,
101 fq->overlimit,
102 fq->collisions,
103 fq->memory_usage,
104 fq->memory_limit,
105 fq->limit,
106 fq->quantum);
107
108 rcu_read_unlock();
109 spin_unlock_bh(&local->fq.lock);
110
111 return simple_read_from_buffer(user_buf, count, ppos,
112 buf, len);
113}
114
115static ssize_t aqm_write(struct file *file,
116 const char __user *user_buf,
117 size_t count,
118 loff_t *ppos)
119{
120 struct ieee80211_local *local = file->private_data;
121 char buf[100];
122 size_t len;
123
124 if (count > sizeof(buf))
125 return -EINVAL;
126
127 if (copy_from_user(buf, user_buf, count))
128 return -EFAULT;
129
130 buf[sizeof(buf) - 1] = '\0';
131 len = strlen(buf);
132 if (len > 0 && buf[len-1] == '\n')
133 buf[len-1] = 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
145static const struct file_operations aqm_ops = {
146 .write = aqm_write,
147 .read = aqm_read,
148 .open = simple_open,
149 .llseek = default_llseek,
150};
151
152#ifdef CONFIG_PM
153static ssize_t reset_write(struct file *file, const char __user *user_buf,
154 size_t count, loff_t *ppos)
155{
156 struct ieee80211_local *local = file->private_data;
157
158 rtnl_lock();
159 __ieee80211_suspend(&local->hw, NULL);
160 __ieee80211_resume(&local->hw);
161 rtnl_unlock();
162
163 return count;
164}
165
166static const struct file_operations reset_ops = {
167 .write = reset_write,
168 .open = simple_open,
169 .llseek = noop_llseek,
170};
171#endif
172
173static const char *hw_flag_names[] = {
174#define FLAG(F) [IEEE80211_HW_##F] = #F
175 FLAG(HAS_RATE_CONTROL),
176 FLAG(RX_INCLUDES_FCS),
177 FLAG(HOST_BROADCAST_PS_BUFFERING),
178 FLAG(SIGNAL_UNSPEC),
179 FLAG(SIGNAL_DBM),
180 FLAG(NEED_DTIM_BEFORE_ASSOC),
181 FLAG(SPECTRUM_MGMT),
182 FLAG(AMPDU_AGGREGATION),
183 FLAG(SUPPORTS_PS),
184 FLAG(PS_NULLFUNC_STACK),
185 FLAG(SUPPORTS_DYNAMIC_PS),
186 FLAG(MFP_CAPABLE),
187 FLAG(WANT_MONITOR_VIF),
188 FLAG(NO_AUTO_VIF),
189 FLAG(SW_CRYPTO_CONTROL),
190 FLAG(SUPPORT_FAST_XMIT),
191 FLAG(REPORTS_TX_ACK_STATUS),
192 FLAG(CONNECTION_MONITOR),
193 FLAG(QUEUE_CONTROL),
194 FLAG(SUPPORTS_PER_STA_GTK),
195 FLAG(AP_LINK_PS),
196 FLAG(TX_AMPDU_SETUP_IN_HW),
197 FLAG(SUPPORTS_RC_TABLE),
198 FLAG(P2P_DEV_ADDR_FOR_INTF),
199 FLAG(TIMING_BEACON_ONLY),
200 FLAG(SUPPORTS_HT_CCK_RATES),
201 FLAG(CHANCTX_STA_CSA),
202 FLAG(SUPPORTS_CLONED_SKBS),
203 FLAG(SINGLE_SCAN_ON_ALL_BANDS),
204 FLAG(TDLS_WIDER_BW),
205 FLAG(SUPPORTS_AMSDU_IN_AMPDU),
206 FLAG(BEACON_TX_STATUS),
207 FLAG(NEEDS_UNIQUE_STA_ADDR),
208 FLAG(SUPPORTS_REORDERING_BUFFER),
209 FLAG(USES_RSS),
210 FLAG(TX_AMSDU),
211 FLAG(TX_FRAG_LIST),
212 FLAG(REPORTS_LOW_ACK),
213 FLAG(SUPPORTS_TX_FRAG),
214 FLAG(SUPPORTS_TDLS_BUFFER_STA),
215 FLAG(DOESNT_SUPPORT_QOS_NDP),
216#undef FLAG
217};
218
219static ssize_t hwflags_read(struct file *file, char __user *user_buf,
220 size_t count, loff_t *ppos)
221{
222 struct ieee80211_local *local = file->private_data;
223 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
224 char *buf = kzalloc(bufsz, GFP_KERNEL);
225 char *pos = buf, *end = buf + bufsz - 1;
226 ssize_t rv;
227 int i;
228
229 if (!buf)
230 return -ENOMEM;
231
232 /* fail compilation if somebody adds or removes
233 * a flag without updating the name array above
234 */
235 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
236
237 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
238 if (test_bit(i, local->hw.flags))
239 pos += scnprintf(pos, end - pos, "%s\n",
240 hw_flag_names[i]);
241 }
242
243 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
244 kfree(buf);
245 return rv;
246}
247
248static ssize_t misc_read(struct file *file, char __user *user_buf,
249 size_t count, loff_t *ppos)
250{
251 struct ieee80211_local *local = file->private_data;
252 /* Max len of each line is 16 characters, plus 9 for 'pending:\n' */
253 size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9;
254 char *buf;
255 char *pos, *end;
256 ssize_t rv;
257 int i;
258 int ln;
259
260 buf = kzalloc(bufsz, GFP_KERNEL);
261 if (!buf)
262 return -ENOMEM;
263
264 pos = buf;
265 end = buf + bufsz - 1;
266
267 pos += scnprintf(pos, end - pos, "pending:\n");
268
269 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
270 ln = skb_queue_len(&local->pending[i]);
271 pos += scnprintf(pos, end - pos, "[%i] %d\n",
272 i, ln);
273 }
274
275 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
276 kfree(buf);
277 return rv;
278}
279
280static ssize_t queues_read(struct file *file, char __user *user_buf,
281 size_t count, loff_t *ppos)
282{
283 struct ieee80211_local *local = file->private_data;
284 unsigned long flags;
285 char buf[IEEE80211_MAX_QUEUES * 20];
286 int q, res = 0;
287
288 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
289 for (q = 0; q < local->hw.queues; q++)
290 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
291 local->queue_stop_reasons[q],
292 skb_queue_len(&local->pending[q]));
293 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
294
295 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
296}
297
298DEBUGFS_READONLY_FILE_OPS(hwflags);
299DEBUGFS_READONLY_FILE_OPS(queues);
300DEBUGFS_READONLY_FILE_OPS(misc);
301
302/* statistics stuff */
303
304static ssize_t format_devstat_counter(struct ieee80211_local *local,
305 char __user *userbuf,
306 size_t count, loff_t *ppos,
307 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
308 int buflen))
309{
310 struct ieee80211_low_level_stats stats;
311 char buf[20];
312 int res;
313
314 rtnl_lock();
315 res = drv_get_stats(local, &stats);
316 rtnl_unlock();
317 if (res)
318 return res;
319 res = printvalue(&stats, buf, sizeof(buf));
320 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
321}
322
323#define DEBUGFS_DEVSTATS_FILE(name) \
324static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
325 char *buf, int buflen) \
326{ \
327 return scnprintf(buf, buflen, "%u\n", stats->name); \
328} \
329static ssize_t stats_ ##name## _read(struct file *file, \
330 char __user *userbuf, \
331 size_t count, loff_t *ppos) \
332{ \
333 return format_devstat_counter(file->private_data, \
334 userbuf, \
335 count, \
336 ppos, \
337 print_devstats_##name); \
338} \
339 \
340static const struct file_operations stats_ ##name## _ops = { \
341 .read = stats_ ##name## _read, \
342 .open = simple_open, \
343 .llseek = generic_file_llseek, \
344};
345
346#define DEBUGFS_STATS_ADD(name) \
347 debugfs_create_u32(#name, 0400, statsd, &local->name);
348#define DEBUGFS_DEVSTATS_ADD(name) \
349 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
350
351DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
352DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
353DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
354DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
355
356void debugfs_hw_add(struct ieee80211_local *local)
357{
358 struct dentry *phyd = local->hw.wiphy->debugfsdir;
359 struct dentry *statsd;
360
361 if (!phyd)
362 return;
363
364 local->debugfs.keys = debugfs_create_dir("keys", phyd);
365
366 DEBUGFS_ADD(total_ps_buffered);
367 DEBUGFS_ADD(wep_iv);
368 DEBUGFS_ADD(rate_ctrl_alg);
369 DEBUGFS_ADD(queues);
370 DEBUGFS_ADD(misc);
371#ifdef CONFIG_PM
372 DEBUGFS_ADD_MODE(reset, 0200);
373#endif
374 DEBUGFS_ADD(hwflags);
375 DEBUGFS_ADD(user_power);
376 DEBUGFS_ADD(power);
377
378 if (local->ops->wake_tx_queue)
379 DEBUGFS_ADD_MODE(aqm, 0600);
380
381 statsd = debugfs_create_dir("statistics", phyd);
382
383 /* if the dir failed, don't put all the other things into the root! */
384 if (!statsd)
385 return;
386
387#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
388 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
389 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
390 DEBUGFS_STATS_ADD(dot11FailedCount);
391 DEBUGFS_STATS_ADD(dot11RetryCount);
392 DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
393 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
394 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
395 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
396 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
397 DEBUGFS_STATS_ADD(tx_handlers_drop);
398 DEBUGFS_STATS_ADD(tx_handlers_queued);
399 DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
400 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
401 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
402 DEBUGFS_STATS_ADD(rx_handlers_drop);
403 DEBUGFS_STATS_ADD(rx_handlers_queued);
404 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
405 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
406 DEBUGFS_STATS_ADD(tx_expand_skb_head);
407 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
408 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
409 DEBUGFS_STATS_ADD(rx_handlers_fragments);
410 DEBUGFS_STATS_ADD(tx_status_drop);
411#endif
412 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
413 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
414 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
415 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
416}