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),
204 FLAG(REPORTS_LOW_ACK),
208 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
209 size_t count, loff_t *ppos)
211 struct ieee80211_local *local = file->private_data;
212 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
213 char *buf = kzalloc(bufsz, GFP_KERNEL);
214 char *pos = buf, *end = buf + bufsz - 1;
221 /* fail compilation if somebody adds or removes
222 * a flag without updating the name array above
224 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
226 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
227 if (test_bit(i, local->hw.flags))
228 pos += scnprintf(pos, end - pos, "%s\n",
232 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
237 static ssize_t queues_read(struct file *file, char __user *user_buf,
238 size_t count, loff_t *ppos)
240 struct ieee80211_local *local = file->private_data;
242 char buf[IEEE80211_MAX_QUEUES * 20];
245 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
246 for (q = 0; q < local->hw.queues; q++)
247 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
248 local->queue_stop_reasons[q],
249 skb_queue_len(&local->pending[q]));
250 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
252 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
255 DEBUGFS_READONLY_FILE_OPS(hwflags);
256 DEBUGFS_READONLY_FILE_OPS(queues);
258 /* statistics stuff */
260 static ssize_t format_devstat_counter(struct ieee80211_local *local,
261 char __user *userbuf,
262 size_t count, loff_t *ppos,
263 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
266 struct ieee80211_low_level_stats stats;
271 res = drv_get_stats(local, &stats);
275 res = printvalue(&stats, buf, sizeof(buf));
276 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
279 #define DEBUGFS_DEVSTATS_FILE(name) \
280 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
281 char *buf, int buflen) \
283 return scnprintf(buf, buflen, "%u\n", stats->name); \
285 static ssize_t stats_ ##name## _read(struct file *file, \
286 char __user *userbuf, \
287 size_t count, loff_t *ppos) \
289 return format_devstat_counter(file->private_data, \
293 print_devstats_##name); \
296 static const struct file_operations stats_ ##name## _ops = { \
297 .read = stats_ ##name## _read, \
298 .open = simple_open, \
299 .llseek = generic_file_llseek, \
302 #define DEBUGFS_STATS_ADD(name) \
303 debugfs_create_u32(#name, 0400, statsd, &local->name);
304 #define DEBUGFS_DEVSTATS_ADD(name) \
305 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
307 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
308 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
309 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
310 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
312 void debugfs_hw_add(struct ieee80211_local *local)
314 struct dentry *phyd = local->hw.wiphy->debugfsdir;
315 struct dentry *statsd;
320 local->debugfs.keys = debugfs_create_dir("keys", phyd);
322 DEBUGFS_ADD(total_ps_buffered);
326 DEBUGFS_ADD_MODE(reset, 0200);
328 DEBUGFS_ADD(hwflags);
329 DEBUGFS_ADD(user_power);
332 if (local->ops->wake_tx_queue)
333 DEBUGFS_ADD_MODE(aqm, 0600);
335 statsd = debugfs_create_dir("statistics", phyd);
337 /* if the dir failed, don't put all the other things into the root! */
341 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
342 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
343 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
344 DEBUGFS_STATS_ADD(dot11FailedCount);
345 DEBUGFS_STATS_ADD(dot11RetryCount);
346 DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
347 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
348 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
349 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
350 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
351 DEBUGFS_STATS_ADD(tx_handlers_drop);
352 DEBUGFS_STATS_ADD(tx_handlers_queued);
353 DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
354 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
355 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
356 DEBUGFS_STATS_ADD(rx_handlers_drop);
357 DEBUGFS_STATS_ADD(rx_handlers_queued);
358 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
359 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
360 DEBUGFS_STATS_ADD(tx_expand_skb_head);
361 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
362 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
363 DEBUGFS_STATS_ADD(rx_handlers_fragments);
364 DEBUGFS_STATS_ADD(tx_status_drop);
366 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
367 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
368 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
369 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);