2 * mac80211 debugfs for wireless PHYs
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright (C) 2018 Intel Corporation
12 #include <linux/debugfs.h>
13 #include <linux/rtnetlink.h>
14 #include <linux/vmalloc.h>
15 #include "ieee80211_i.h"
16 #include "driver-ops.h"
20 #define DEBUGFS_FORMAT_BUFFER_SIZE 100
22 int mac80211_format_buffer(char __user *userbuf, size_t count,
23 loff_t *ppos, char *fmt, ...)
26 char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
30 res = vscnprintf(buf, sizeof(buf), fmt, args);
33 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
36 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \
37 static ssize_t name## _read(struct file *file, char __user *userbuf, \
38 size_t count, loff_t *ppos) \
40 struct ieee80211_local *local = file->private_data; \
42 return mac80211_format_buffer(userbuf, count, ppos, \
46 #define DEBUGFS_READONLY_FILE_OPS(name) \
47 static const struct file_operations name## _ops = { \
48 .read = name## _read, \
49 .open = simple_open, \
50 .llseek = generic_file_llseek, \
53 #define DEBUGFS_READONLY_FILE(name, fmt, value...) \
54 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \
55 DEBUGFS_READONLY_FILE_OPS(name)
57 #define DEBUGFS_ADD(name) \
58 debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
60 #define DEBUGFS_ADD_MODE(name, mode) \
61 debugfs_create_file(#name, mode, phyd, local, &name## _ops);
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");
75 static ssize_t aqm_read(struct file *file,
76 char __user *user_buf,
80 struct ieee80211_local *local = file->private_data;
81 struct fq *fq = &local->fq;
85 spin_lock_bh(&local->fq.lock);
88 len = scnprintf(buf, sizeof(buf),
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"
110 spin_unlock_bh(&local->fq.lock);
112 return simple_read_from_buffer(user_buf, count, ppos,
116 static ssize_t aqm_write(struct file *file,
117 const char __user *user_buf,
121 struct ieee80211_local *local = file->private_data;
125 if (count > sizeof(buf))
128 if (copy_from_user(buf, user_buf, count))
131 buf[sizeof(buf) - 1] = '\0';
133 if (len > 0 && buf[len-1] == '\n')
136 if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1)
138 else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1)
140 else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1)
146 static const struct file_operations aqm_ops = {
150 .llseek = default_llseek,
154 static ssize_t reset_write(struct file *file, const char __user *user_buf,
155 size_t count, loff_t *ppos)
157 struct ieee80211_local *local = file->private_data;
160 __ieee80211_suspend(&local->hw, NULL);
161 __ieee80211_resume(&local->hw);
167 static const struct file_operations reset_ops = {
168 .write = reset_write,
170 .llseek = noop_llseek,
174 static const char *hw_flag_names[] = {
175 #define FLAG(F) [IEEE80211_HW_##F] = #F
176 FLAG(HAS_RATE_CONTROL),
177 FLAG(RX_INCLUDES_FCS),
178 FLAG(HOST_BROADCAST_PS_BUFFERING),
181 FLAG(NEED_DTIM_BEFORE_ASSOC),
183 FLAG(AMPDU_AGGREGATION),
185 FLAG(PS_NULLFUNC_STACK),
186 FLAG(SUPPORTS_DYNAMIC_PS),
188 FLAG(WANT_MONITOR_VIF),
190 FLAG(SW_CRYPTO_CONTROL),
191 FLAG(SUPPORT_FAST_XMIT),
192 FLAG(REPORTS_TX_ACK_STATUS),
193 FLAG(CONNECTION_MONITOR),
195 FLAG(SUPPORTS_PER_STA_GTK),
197 FLAG(TX_AMPDU_SETUP_IN_HW),
198 FLAG(SUPPORTS_RC_TABLE),
199 FLAG(P2P_DEV_ADDR_FOR_INTF),
200 FLAG(TIMING_BEACON_ONLY),
201 FLAG(SUPPORTS_HT_CCK_RATES),
202 FLAG(CHANCTX_STA_CSA),
203 FLAG(SUPPORTS_CLONED_SKBS),
204 FLAG(SINGLE_SCAN_ON_ALL_BANDS),
206 FLAG(SUPPORTS_AMSDU_IN_AMPDU),
207 FLAG(BEACON_TX_STATUS),
208 FLAG(NEEDS_UNIQUE_STA_ADDR),
209 FLAG(SUPPORTS_REORDERING_BUFFER),
213 FLAG(REPORTS_LOW_ACK),
214 FLAG(SUPPORTS_TX_FRAG),
215 FLAG(SUPPORTS_TDLS_BUFFER_STA),
216 FLAG(DEAUTH_NEED_MGD_TX_PREP),
217 FLAG(DOESNT_SUPPORT_QOS_NDP),
218 FLAG(BUFF_MMPDU_TXQ),
219 FLAG(SUPPORTS_VHT_EXT_NSS_BW),
221 FLAG(TX_STATUS_NO_AMPDU_LEN),
225 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
226 size_t count, loff_t *ppos)
228 struct ieee80211_local *local = file->private_data;
229 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
230 char *buf = kzalloc(bufsz, GFP_KERNEL);
231 char *pos = buf, *end = buf + bufsz - 1;
238 /* fail compilation if somebody adds or removes
239 * a flag without updating the name array above
241 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
243 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
244 if (test_bit(i, local->hw.flags))
245 pos += scnprintf(pos, end - pos, "%s\n",
249 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
254 static ssize_t misc_read(struct file *file, char __user *user_buf,
255 size_t count, loff_t *ppos)
257 struct ieee80211_local *local = file->private_data;
258 /* Max len of each line is 16 characters, plus 9 for 'pending:\n' */
259 size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9;
266 buf = kzalloc(bufsz, GFP_KERNEL);
271 end = buf + bufsz - 1;
273 pos += scnprintf(pos, end - pos, "pending:\n");
275 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
276 ln = skb_queue_len(&local->pending[i]);
277 pos += scnprintf(pos, end - pos, "[%i] %d\n",
281 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
286 static ssize_t queues_read(struct file *file, char __user *user_buf,
287 size_t count, loff_t *ppos)
289 struct ieee80211_local *local = file->private_data;
291 char buf[IEEE80211_MAX_QUEUES * 20];
294 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
295 for (q = 0; q < local->hw.queues; q++)
296 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
297 local->queue_stop_reasons[q],
298 skb_queue_len(&local->pending[q]));
299 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
301 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
304 DEBUGFS_READONLY_FILE_OPS(hwflags);
305 DEBUGFS_READONLY_FILE_OPS(queues);
306 DEBUGFS_READONLY_FILE_OPS(misc);
308 /* statistics stuff */
310 static ssize_t format_devstat_counter(struct ieee80211_local *local,
311 char __user *userbuf,
312 size_t count, loff_t *ppos,
313 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
316 struct ieee80211_low_level_stats stats;
321 res = drv_get_stats(local, &stats);
325 res = printvalue(&stats, buf, sizeof(buf));
326 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
329 #define DEBUGFS_DEVSTATS_FILE(name) \
330 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
331 char *buf, int buflen) \
333 return scnprintf(buf, buflen, "%u\n", stats->name); \
335 static ssize_t stats_ ##name## _read(struct file *file, \
336 char __user *userbuf, \
337 size_t count, loff_t *ppos) \
339 return format_devstat_counter(file->private_data, \
343 print_devstats_##name); \
346 static const struct file_operations stats_ ##name## _ops = { \
347 .read = stats_ ##name## _read, \
348 .open = simple_open, \
349 .llseek = generic_file_llseek, \
352 #define DEBUGFS_STATS_ADD(name) \
353 debugfs_create_u32(#name, 0400, statsd, &local->name);
354 #define DEBUGFS_DEVSTATS_ADD(name) \
355 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
357 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
358 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
359 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
360 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
362 void debugfs_hw_add(struct ieee80211_local *local)
364 struct dentry *phyd = local->hw.wiphy->debugfsdir;
365 struct dentry *statsd;
370 local->debugfs.keys = debugfs_create_dir("keys", phyd);
372 DEBUGFS_ADD(total_ps_buffered);
374 DEBUGFS_ADD(rate_ctrl_alg);
378 DEBUGFS_ADD_MODE(reset, 0200);
380 DEBUGFS_ADD(hwflags);
381 DEBUGFS_ADD(user_power);
384 if (local->ops->wake_tx_queue)
385 DEBUGFS_ADD_MODE(aqm, 0600);
387 debugfs_create_u16("airtime_flags", 0600,
388 phyd, &local->airtime_flags);
390 statsd = debugfs_create_dir("statistics", phyd);
392 /* if the dir failed, don't put all the other things into the root! */
396 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
397 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
398 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
399 DEBUGFS_STATS_ADD(dot11FailedCount);
400 DEBUGFS_STATS_ADD(dot11RetryCount);
401 DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
402 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
403 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
404 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
405 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
406 DEBUGFS_STATS_ADD(tx_handlers_drop);
407 DEBUGFS_STATS_ADD(tx_handlers_queued);
408 DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
409 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
410 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
411 DEBUGFS_STATS_ADD(rx_handlers_drop);
412 DEBUGFS_STATS_ADD(rx_handlers_queued);
413 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
414 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
415 DEBUGFS_STATS_ADD(tx_expand_skb_head);
416 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
417 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
418 DEBUGFS_STATS_ADD(rx_handlers_fragments);
419 DEBUGFS_STATS_ADD(tx_status_drop);
421 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
422 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
423 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
424 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);