1 // SPDX-License-Identifier: GPL-2.0-only
3 * mac80211 debugfs for wireless PHYs
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2018 - 2019 Intel Corporation
10 #include <linux/debugfs.h>
11 #include <linux/rtnetlink.h>
12 #include <linux/vmalloc.h>
13 #include "ieee80211_i.h"
14 #include "driver-ops.h"
18 #define DEBUGFS_FORMAT_BUFFER_SIZE 100
20 int mac80211_format_buffer(char __user *userbuf, size_t count,
21 loff_t *ppos, char *fmt, ...)
24 char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
28 res = vscnprintf(buf, sizeof(buf), fmt, args);
31 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
34 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \
35 static ssize_t name## _read(struct file *file, char __user *userbuf, \
36 size_t count, loff_t *ppos) \
38 struct ieee80211_local *local = file->private_data; \
40 return mac80211_format_buffer(userbuf, count, ppos, \
44 #define DEBUGFS_READONLY_FILE_OPS(name) \
45 static const struct file_operations name## _ops = { \
46 .read = name## _read, \
47 .open = simple_open, \
48 .llseek = generic_file_llseek, \
51 #define DEBUGFS_READONLY_FILE(name, fmt, value...) \
52 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \
53 DEBUGFS_READONLY_FILE_OPS(name)
55 #define DEBUGFS_ADD(name) \
56 debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
58 #define DEBUGFS_ADD_MODE(name, mode) \
59 debugfs_create_file(#name, mode, phyd, local, &name## _ops);
62 DEBUGFS_READONLY_FILE(user_power, "%d",
63 local->user_power_level);
64 DEBUGFS_READONLY_FILE(power, "%d",
65 local->hw.conf.power_level);
66 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
67 local->total_ps_buffered);
68 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
69 local->wep_iv & 0xffffff);
70 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
71 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
73 static ssize_t aqm_read(struct file *file,
74 char __user *user_buf,
78 struct ieee80211_local *local = file->private_data;
79 struct fq *fq = &local->fq;
83 spin_lock_bh(&local->fq.lock);
86 len = scnprintf(buf, sizeof(buf),
91 "R fq_overmemory %u\n"
92 "R fq_collisions %u\n"
93 "R fq_memory_usage %u\n"
94 "RW fq_memory_limit %u\n"
108 spin_unlock_bh(&local->fq.lock);
110 return simple_read_from_buffer(user_buf, count, ppos,
114 static ssize_t aqm_write(struct file *file,
115 const char __user *user_buf,
119 struct ieee80211_local *local = file->private_data;
123 if (count > sizeof(buf))
126 if (copy_from_user(buf, user_buf, count))
129 buf[sizeof(buf) - 1] = '\0';
131 if (len > 0 && buf[len-1] == '\n')
134 if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1)
136 else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1)
138 else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1)
144 static const struct file_operations aqm_ops = {
148 .llseek = default_llseek,
151 static ssize_t force_tx_status_read(struct file *file,
152 char __user *user_buf,
156 struct ieee80211_local *local = file->private_data;
160 len = scnprintf(buf, sizeof(buf), "%d\n", (int)local->force_tx_status);
162 return simple_read_from_buffer(user_buf, count, ppos,
166 static ssize_t force_tx_status_write(struct file *file,
167 const char __user *user_buf,
171 struct ieee80211_local *local = file->private_data;
175 if (count > sizeof(buf))
178 if (copy_from_user(buf, user_buf, count))
181 buf[sizeof(buf) - 1] = '\0';
183 if (len > 0 && buf[len - 1] == '\n')
186 if (buf[0] == '0' && buf[1] == '\0')
187 local->force_tx_status = 0;
188 else if (buf[0] == '1' && buf[1] == '\0')
189 local->force_tx_status = 1;
196 static const struct file_operations force_tx_status_ops = {
197 .write = force_tx_status_write,
198 .read = force_tx_status_read,
200 .llseek = default_llseek,
204 static ssize_t reset_write(struct file *file, const char __user *user_buf,
205 size_t count, loff_t *ppos)
207 struct ieee80211_local *local = file->private_data;
210 __ieee80211_suspend(&local->hw, NULL);
211 __ieee80211_resume(&local->hw);
217 static const struct file_operations reset_ops = {
218 .write = reset_write,
220 .llseek = noop_llseek,
224 static const char *hw_flag_names[] = {
225 #define FLAG(F) [IEEE80211_HW_##F] = #F
226 FLAG(HAS_RATE_CONTROL),
227 FLAG(RX_INCLUDES_FCS),
228 FLAG(HOST_BROADCAST_PS_BUFFERING),
231 FLAG(NEED_DTIM_BEFORE_ASSOC),
233 FLAG(AMPDU_AGGREGATION),
235 FLAG(PS_NULLFUNC_STACK),
236 FLAG(SUPPORTS_DYNAMIC_PS),
238 FLAG(WANT_MONITOR_VIF),
240 FLAG(SW_CRYPTO_CONTROL),
241 FLAG(SUPPORT_FAST_XMIT),
242 FLAG(REPORTS_TX_ACK_STATUS),
243 FLAG(CONNECTION_MONITOR),
245 FLAG(SUPPORTS_PER_STA_GTK),
247 FLAG(TX_AMPDU_SETUP_IN_HW),
248 FLAG(SUPPORTS_RC_TABLE),
249 FLAG(P2P_DEV_ADDR_FOR_INTF),
250 FLAG(TIMING_BEACON_ONLY),
251 FLAG(SUPPORTS_HT_CCK_RATES),
252 FLAG(CHANCTX_STA_CSA),
253 FLAG(SUPPORTS_CLONED_SKBS),
254 FLAG(SINGLE_SCAN_ON_ALL_BANDS),
256 FLAG(SUPPORTS_AMSDU_IN_AMPDU),
257 FLAG(BEACON_TX_STATUS),
258 FLAG(NEEDS_UNIQUE_STA_ADDR),
259 FLAG(SUPPORTS_REORDERING_BUFFER),
263 FLAG(REPORTS_LOW_ACK),
264 FLAG(SUPPORTS_TX_FRAG),
265 FLAG(SUPPORTS_TDLS_BUFFER_STA),
266 FLAG(DEAUTH_NEED_MGD_TX_PREP),
267 FLAG(DOESNT_SUPPORT_QOS_NDP),
268 FLAG(BUFF_MMPDU_TXQ),
269 FLAG(SUPPORTS_VHT_EXT_NSS_BW),
271 FLAG(TX_STATUS_NO_AMPDU_LEN),
272 FLAG(SUPPORTS_MULTI_BSSID),
273 FLAG(SUPPORTS_ONLY_HE_MULTI_BSSID),
274 FLAG(EXT_KEY_ID_NATIVE),
275 FLAG(NO_AMPDU_KEYBORDER_SUPPORT),
279 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
280 size_t count, loff_t *ppos)
282 struct ieee80211_local *local = file->private_data;
283 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
284 char *buf = kzalloc(bufsz, GFP_KERNEL);
285 char *pos = buf, *end = buf + bufsz - 1;
292 /* fail compilation if somebody adds or removes
293 * a flag without updating the name array above
295 BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
297 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
298 if (test_bit(i, local->hw.flags))
299 pos += scnprintf(pos, end - pos, "%s\n",
303 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
308 static ssize_t misc_read(struct file *file, char __user *user_buf,
309 size_t count, loff_t *ppos)
311 struct ieee80211_local *local = file->private_data;
312 /* Max len of each line is 16 characters, plus 9 for 'pending:\n' */
313 size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9;
320 buf = kzalloc(bufsz, GFP_KERNEL);
325 end = buf + bufsz - 1;
327 pos += scnprintf(pos, end - pos, "pending:\n");
329 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
330 ln = skb_queue_len(&local->pending[i]);
331 pos += scnprintf(pos, end - pos, "[%i] %d\n",
335 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
340 static ssize_t queues_read(struct file *file, char __user *user_buf,
341 size_t count, loff_t *ppos)
343 struct ieee80211_local *local = file->private_data;
345 char buf[IEEE80211_MAX_QUEUES * 20];
348 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
349 for (q = 0; q < local->hw.queues; q++)
350 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
351 local->queue_stop_reasons[q],
352 skb_queue_len(&local->pending[q]));
353 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
355 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
358 DEBUGFS_READONLY_FILE_OPS(hwflags);
359 DEBUGFS_READONLY_FILE_OPS(queues);
360 DEBUGFS_READONLY_FILE_OPS(misc);
362 /* statistics stuff */
364 static ssize_t format_devstat_counter(struct ieee80211_local *local,
365 char __user *userbuf,
366 size_t count, loff_t *ppos,
367 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
370 struct ieee80211_low_level_stats stats;
375 res = drv_get_stats(local, &stats);
379 res = printvalue(&stats, buf, sizeof(buf));
380 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
383 #define DEBUGFS_DEVSTATS_FILE(name) \
384 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
385 char *buf, int buflen) \
387 return scnprintf(buf, buflen, "%u\n", stats->name); \
389 static ssize_t stats_ ##name## _read(struct file *file, \
390 char __user *userbuf, \
391 size_t count, loff_t *ppos) \
393 return format_devstat_counter(file->private_data, \
397 print_devstats_##name); \
400 static const struct file_operations stats_ ##name## _ops = { \
401 .read = stats_ ##name## _read, \
402 .open = simple_open, \
403 .llseek = generic_file_llseek, \
406 #define DEBUGFS_STATS_ADD(name) \
407 debugfs_create_u32(#name, 0400, statsd, &local->name);
408 #define DEBUGFS_DEVSTATS_ADD(name) \
409 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
411 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
412 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
413 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
414 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
416 void debugfs_hw_add(struct ieee80211_local *local)
418 struct dentry *phyd = local->hw.wiphy->debugfsdir;
419 struct dentry *statsd;
424 local->debugfs.keys = debugfs_create_dir("keys", phyd);
426 DEBUGFS_ADD(total_ps_buffered);
428 DEBUGFS_ADD(rate_ctrl_alg);
432 DEBUGFS_ADD_MODE(reset, 0200);
434 DEBUGFS_ADD(hwflags);
435 DEBUGFS_ADD(user_power);
437 DEBUGFS_ADD_MODE(force_tx_status, 0600);
439 if (local->ops->wake_tx_queue)
440 DEBUGFS_ADD_MODE(aqm, 0600);
442 debugfs_create_u16("airtime_flags", 0600,
443 phyd, &local->airtime_flags);
445 statsd = debugfs_create_dir("statistics", phyd);
447 /* if the dir failed, don't put all the other things into the root! */
451 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
452 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
453 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
454 DEBUGFS_STATS_ADD(dot11FailedCount);
455 DEBUGFS_STATS_ADD(dot11RetryCount);
456 DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
457 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
458 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
459 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
460 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
461 DEBUGFS_STATS_ADD(tx_handlers_drop);
462 DEBUGFS_STATS_ADD(tx_handlers_queued);
463 DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
464 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
465 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
466 DEBUGFS_STATS_ADD(rx_handlers_drop);
467 DEBUGFS_STATS_ADD(rx_handlers_queued);
468 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
469 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
470 DEBUGFS_STATS_ADD(tx_expand_skb_head);
471 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
472 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
473 DEBUGFS_STATS_ADD(rx_handlers_fragments);
474 DEBUGFS_STATS_ADD(tx_status_drop);
476 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
477 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
478 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
479 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);