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");
75 struct ieee80211_local *local;
81 #define AQM_HDR_LEN 200
82 #define AQM_HW_ENTRY_LEN 40
83 #define AQM_TXQ_ENTRY_LEN 110
85 static int aqm_open(struct inode *inode, struct file *file)
87 struct ieee80211_local *local = inode->i_private;
88 struct ieee80211_sub_if_data *sdata;
90 struct txq_info *txqi;
91 struct fq *fq = &local->fq;
92 struct aqm_info *info = NULL;
96 if (!local->ops->wake_tx_queue)
100 len += 6 * AQM_HW_ENTRY_LEN;
103 list_for_each_entry_rcu(sdata, &local->interfaces, list)
104 len += AQM_TXQ_ENTRY_LEN;
105 list_for_each_entry_rcu(sta, &local->sta_list, list)
106 len += AQM_TXQ_ENTRY_LEN * ARRAY_SIZE(sta->sta.txq);
113 spin_lock_bh(&local->fq.lock);
116 file->private_data = info;
121 len += scnprintf(info->buf + len, info->size - len,
123 "access name value\n"
124 "R fq_flows_cnt %u\n"
126 "R fq_overlimit %u\n"
127 "R fq_collisions %u\n"
129 "RW fq_quantum %u\n",
137 len += scnprintf(info->buf + len,
140 "ifname addr ac backlog-bytes backlog-packets flows overlimit collisions tx-bytes tx-packets\n");
142 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
143 txqi = to_txq_info(sdata->vif.txq);
144 len += scnprintf(info->buf + len, info->size - len,
145 "%s %pM %u %u %u %u %u %u %u %u\n",
149 txqi->tin.backlog_bytes,
150 txqi->tin.backlog_packets,
153 txqi->tin.collisions,
155 txqi->tin.tx_packets);
158 len += scnprintf(info->buf + len,
161 "ifname addr tid ac backlog-bytes backlog-packets flows overlimit collisions tx-bytes tx-packets\n");
163 list_for_each_entry_rcu(sta, &local->sta_list, list) {
165 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
166 txqi = to_txq_info(sta->sta.txq[i]);
167 len += scnprintf(info->buf + len, info->size - len,
168 "%s %pM %d %d %u %u %u %u %u %u %u\n",
173 txqi->tin.backlog_bytes,
174 txqi->tin.backlog_packets,
177 txqi->tin.collisions,
179 txqi->tin.tx_packets);
186 spin_unlock_bh(&local->fq.lock);
191 static int aqm_release(struct inode *inode, struct file *file)
193 vfree(file->private_data);
197 static ssize_t aqm_read(struct file *file,
198 char __user *user_buf,
202 struct aqm_info *info = file->private_data;
204 return simple_read_from_buffer(user_buf, count, ppos,
205 info->buf, info->len);
208 static ssize_t aqm_write(struct file *file,
209 const char __user *user_buf,
213 struct aqm_info *info = file->private_data;
214 struct ieee80211_local *local = info->local;
218 if (count > sizeof(buf))
221 if (copy_from_user(buf, user_buf, count))
224 buf[sizeof(buf) - 1] = '\0';
226 if (len > 0 && buf[len-1] == '\n')
229 if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1)
231 else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1)
237 static const struct file_operations aqm_ops = {
241 .release = aqm_release,
242 .llseek = default_llseek,
246 static ssize_t reset_write(struct file *file, const char __user *user_buf,
247 size_t count, loff_t *ppos)
249 struct ieee80211_local *local = file->private_data;
252 __ieee80211_suspend(&local->hw, NULL);
253 __ieee80211_resume(&local->hw);
259 static const struct file_operations reset_ops = {
260 .write = reset_write,
262 .llseek = noop_llseek,
266 static const char *hw_flag_names[] = {
267 #define FLAG(F) [IEEE80211_HW_##F] = #F
268 FLAG(HAS_RATE_CONTROL),
269 FLAG(RX_INCLUDES_FCS),
270 FLAG(HOST_BROADCAST_PS_BUFFERING),
273 FLAG(NEED_DTIM_BEFORE_ASSOC),
275 FLAG(AMPDU_AGGREGATION),
277 FLAG(PS_NULLFUNC_STACK),
278 FLAG(SUPPORTS_DYNAMIC_PS),
280 FLAG(WANT_MONITOR_VIF),
282 FLAG(SW_CRYPTO_CONTROL),
283 FLAG(SUPPORT_FAST_XMIT),
284 FLAG(REPORTS_TX_ACK_STATUS),
285 FLAG(CONNECTION_MONITOR),
287 FLAG(SUPPORTS_PER_STA_GTK),
289 FLAG(TX_AMPDU_SETUP_IN_HW),
290 FLAG(SUPPORTS_RC_TABLE),
291 FLAG(P2P_DEV_ADDR_FOR_INTF),
292 FLAG(TIMING_BEACON_ONLY),
293 FLAG(SUPPORTS_HT_CCK_RATES),
294 FLAG(CHANCTX_STA_CSA),
295 FLAG(SUPPORTS_CLONED_SKBS),
296 FLAG(SINGLE_SCAN_ON_ALL_BANDS),
298 FLAG(SUPPORTS_AMSDU_IN_AMPDU),
299 FLAG(BEACON_TX_STATUS),
300 FLAG(NEEDS_UNIQUE_STA_ADDR),
301 FLAG(SUPPORTS_REORDERING_BUFFER),
308 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
309 size_t count, loff_t *ppos)
311 struct ieee80211_local *local = file->private_data;
312 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
313 char *buf = kzalloc(bufsz, GFP_KERNEL);
314 char *pos = buf, *end = buf + bufsz - 1;
321 /* fail compilation if somebody adds or removes
322 * a flag without updating the name array above
324 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
326 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
327 if (test_bit(i, local->hw.flags))
328 pos += scnprintf(pos, end - pos, "%s\n",
332 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
337 static ssize_t queues_read(struct file *file, char __user *user_buf,
338 size_t count, loff_t *ppos)
340 struct ieee80211_local *local = file->private_data;
342 char buf[IEEE80211_MAX_QUEUES * 20];
345 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
346 for (q = 0; q < local->hw.queues; q++)
347 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
348 local->queue_stop_reasons[q],
349 skb_queue_len(&local->pending[q]));
350 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
352 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
355 DEBUGFS_READONLY_FILE_OPS(hwflags);
356 DEBUGFS_READONLY_FILE_OPS(queues);
358 /* statistics stuff */
360 static ssize_t format_devstat_counter(struct ieee80211_local *local,
361 char __user *userbuf,
362 size_t count, loff_t *ppos,
363 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
366 struct ieee80211_low_level_stats stats;
371 res = drv_get_stats(local, &stats);
375 res = printvalue(&stats, buf, sizeof(buf));
376 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
379 #define DEBUGFS_DEVSTATS_FILE(name) \
380 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
381 char *buf, int buflen) \
383 return scnprintf(buf, buflen, "%u\n", stats->name); \
385 static ssize_t stats_ ##name## _read(struct file *file, \
386 char __user *userbuf, \
387 size_t count, loff_t *ppos) \
389 return format_devstat_counter(file->private_data, \
393 print_devstats_##name); \
396 static const struct file_operations stats_ ##name## _ops = { \
397 .read = stats_ ##name## _read, \
398 .open = simple_open, \
399 .llseek = generic_file_llseek, \
402 #define DEBUGFS_STATS_ADD(name) \
403 debugfs_create_u32(#name, 0400, statsd, &local->name);
404 #define DEBUGFS_DEVSTATS_ADD(name) \
405 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
407 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
408 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
409 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
410 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
412 void debugfs_hw_add(struct ieee80211_local *local)
414 struct dentry *phyd = local->hw.wiphy->debugfsdir;
415 struct dentry *statsd;
420 local->debugfs.keys = debugfs_create_dir("keys", phyd);
422 DEBUGFS_ADD(total_ps_buffered);
426 DEBUGFS_ADD_MODE(reset, 0200);
428 DEBUGFS_ADD(hwflags);
429 DEBUGFS_ADD(user_power);
431 DEBUGFS_ADD_MODE(aqm, 0600);
433 statsd = debugfs_create_dir("statistics", phyd);
435 /* if the dir failed, don't put all the other things into the root! */
439 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
440 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
441 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
442 DEBUGFS_STATS_ADD(dot11FailedCount);
443 DEBUGFS_STATS_ADD(dot11RetryCount);
444 DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
445 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
446 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
447 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
448 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
449 DEBUGFS_STATS_ADD(tx_handlers_drop);
450 DEBUGFS_STATS_ADD(tx_handlers_queued);
451 DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
452 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
453 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
454 DEBUGFS_STATS_ADD(rx_handlers_drop);
455 DEBUGFS_STATS_ADD(rx_handlers_queued);
456 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
457 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
458 DEBUGFS_STATS_ADD(tx_expand_skb_head);
459 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
460 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
461 DEBUGFS_STATS_ADD(rx_handlers_fragments);
462 DEBUGFS_STATS_ADD(tx_status_drop);
464 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
465 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
466 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
467 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);