2 * mac80211 debugfs for wireless PHYs
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
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"
19 #define DEBUGFS_FORMAT_BUFFER_SIZE 100
21 int mac80211_format_buffer(char __user *userbuf, size_t count,
22 loff_t *ppos, char *fmt, ...)
25 char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
29 res = vscnprintf(buf, sizeof(buf), fmt, args);
32 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
35 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \
36 static ssize_t name## _read(struct file *file, char __user *userbuf, \
37 size_t count, loff_t *ppos) \
39 struct ieee80211_local *local = file->private_data; \
41 return mac80211_format_buffer(userbuf, count, ppos, \
45 #define DEBUGFS_READONLY_FILE_OPS(name) \
46 static const struct file_operations name## _ops = { \
47 .read = name## _read, \
48 .open = simple_open, \
49 .llseek = generic_file_llseek, \
52 #define DEBUGFS_READONLY_FILE(name, fmt, value...) \
53 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \
54 DEBUGFS_READONLY_FILE_OPS(name)
56 #define DEBUGFS_ADD(name) \
57 debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
59 #define DEBUGFS_ADD_MODE(name, mode) \
60 debugfs_create_file(#name, mode, phyd, local, &name## _ops);
63 DEBUGFS_READONLY_FILE(user_power, "%d",
64 local->user_power_level);
65 DEBUGFS_READONLY_FILE(power, "%d",
66 local->hw.conf.power_level);
67 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
68 local->total_ps_buffered);
69 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
70 local->wep_iv & 0xffffff);
71 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
72 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
74 static ssize_t aqm_read(struct file *file,
75 char __user *user_buf,
79 struct ieee80211_local *local = file->private_data;
80 struct fq *fq = &local->fq;
84 spin_lock_bh(&local->fq.lock);
87 len = scnprintf(buf, sizeof(buf),
92 "R fq_collisions %u\n"
103 spin_unlock_bh(&local->fq.lock);
105 return simple_read_from_buffer(user_buf, count, ppos,
109 static ssize_t aqm_write(struct file *file,
110 const char __user *user_buf,
114 struct ieee80211_local *local = file->private_data;
118 if (count > sizeof(buf))
121 if (copy_from_user(buf, user_buf, count))
124 buf[sizeof(buf) - 1] = '\0';
126 if (len > 0 && buf[len-1] == '\n')
129 if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1)
131 else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1)
137 static const struct file_operations aqm_ops = {
141 .llseek = default_llseek,
145 static ssize_t reset_write(struct file *file, const char __user *user_buf,
146 size_t count, loff_t *ppos)
148 struct ieee80211_local *local = file->private_data;
151 __ieee80211_suspend(&local->hw, NULL);
152 __ieee80211_resume(&local->hw);
158 static const struct file_operations reset_ops = {
159 .write = reset_write,
161 .llseek = noop_llseek,
165 static const char *hw_flag_names[] = {
166 #define FLAG(F) [IEEE80211_HW_##F] = #F
167 FLAG(HAS_RATE_CONTROL),
168 FLAG(RX_INCLUDES_FCS),
169 FLAG(HOST_BROADCAST_PS_BUFFERING),
172 FLAG(NEED_DTIM_BEFORE_ASSOC),
174 FLAG(AMPDU_AGGREGATION),
176 FLAG(PS_NULLFUNC_STACK),
177 FLAG(SUPPORTS_DYNAMIC_PS),
179 FLAG(WANT_MONITOR_VIF),
181 FLAG(SW_CRYPTO_CONTROL),
182 FLAG(SUPPORT_FAST_XMIT),
183 FLAG(REPORTS_TX_ACK_STATUS),
184 FLAG(CONNECTION_MONITOR),
186 FLAG(SUPPORTS_PER_STA_GTK),
188 FLAG(TX_AMPDU_SETUP_IN_HW),
189 FLAG(SUPPORTS_RC_TABLE),
190 FLAG(P2P_DEV_ADDR_FOR_INTF),
191 FLAG(TIMING_BEACON_ONLY),
192 FLAG(SUPPORTS_HT_CCK_RATES),
193 FLAG(CHANCTX_STA_CSA),
194 FLAG(SUPPORTS_CLONED_SKBS),
195 FLAG(SINGLE_SCAN_ON_ALL_BANDS),
197 FLAG(SUPPORTS_AMSDU_IN_AMPDU),
198 FLAG(BEACON_TX_STATUS),
199 FLAG(NEEDS_UNIQUE_STA_ADDR),
200 FLAG(SUPPORTS_REORDERING_BUFFER),
207 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
208 size_t count, loff_t *ppos)
210 struct ieee80211_local *local = file->private_data;
211 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
212 char *buf = kzalloc(bufsz, GFP_KERNEL);
213 char *pos = buf, *end = buf + bufsz - 1;
220 /* fail compilation if somebody adds or removes
221 * a flag without updating the name array above
223 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
225 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
226 if (test_bit(i, local->hw.flags))
227 pos += scnprintf(pos, end - pos, "%s\n",
231 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
236 static ssize_t queues_read(struct file *file, char __user *user_buf,
237 size_t count, loff_t *ppos)
239 struct ieee80211_local *local = file->private_data;
241 char buf[IEEE80211_MAX_QUEUES * 20];
244 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
245 for (q = 0; q < local->hw.queues; q++)
246 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
247 local->queue_stop_reasons[q],
248 skb_queue_len(&local->pending[q]));
249 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
251 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
254 DEBUGFS_READONLY_FILE_OPS(hwflags);
255 DEBUGFS_READONLY_FILE_OPS(queues);
257 /* statistics stuff */
259 static ssize_t format_devstat_counter(struct ieee80211_local *local,
260 char __user *userbuf,
261 size_t count, loff_t *ppos,
262 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
265 struct ieee80211_low_level_stats stats;
270 res = drv_get_stats(local, &stats);
274 res = printvalue(&stats, buf, sizeof(buf));
275 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
278 #define DEBUGFS_DEVSTATS_FILE(name) \
279 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
280 char *buf, int buflen) \
282 return scnprintf(buf, buflen, "%u\n", stats->name); \
284 static ssize_t stats_ ##name## _read(struct file *file, \
285 char __user *userbuf, \
286 size_t count, loff_t *ppos) \
288 return format_devstat_counter(file->private_data, \
292 print_devstats_##name); \
295 static const struct file_operations stats_ ##name## _ops = { \
296 .read = stats_ ##name## _read, \
297 .open = simple_open, \
298 .llseek = generic_file_llseek, \
301 #define DEBUGFS_STATS_ADD(name) \
302 debugfs_create_u32(#name, 0400, statsd, &local->name);
303 #define DEBUGFS_DEVSTATS_ADD(name) \
304 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
306 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
307 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
308 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
309 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
311 void debugfs_hw_add(struct ieee80211_local *local)
313 struct dentry *phyd = local->hw.wiphy->debugfsdir;
314 struct dentry *statsd;
319 local->debugfs.keys = debugfs_create_dir("keys", phyd);
321 DEBUGFS_ADD(total_ps_buffered);
325 DEBUGFS_ADD_MODE(reset, 0200);
327 DEBUGFS_ADD(hwflags);
328 DEBUGFS_ADD(user_power);
331 if (local->ops->wake_tx_queue)
332 DEBUGFS_ADD_MODE(aqm, 0600);
334 statsd = debugfs_create_dir("statistics", phyd);
336 /* if the dir failed, don't put all the other things into the root! */
340 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
341 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
342 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
343 DEBUGFS_STATS_ADD(dot11FailedCount);
344 DEBUGFS_STATS_ADD(dot11RetryCount);
345 DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
346 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
347 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
348 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
349 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
350 DEBUGFS_STATS_ADD(tx_handlers_drop);
351 DEBUGFS_STATS_ADD(tx_handlers_queued);
352 DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
353 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
354 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
355 DEBUGFS_STATS_ADD(rx_handlers_drop);
356 DEBUGFS_STATS_ADD(rx_handlers_queued);
357 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
358 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
359 DEBUGFS_STATS_ADD(tx_expand_skb_head);
360 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
361 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
362 DEBUGFS_STATS_ADD(rx_handlers_fragments);
363 DEBUGFS_STATS_ADD(tx_status_drop);
365 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
366 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
367 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
368 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);