Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * mac80211 debugfs for wireless PHYs
3 *
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 *
7 * GPLv2
8 *
9 */
10
11#include <linux/debugfs.h>
12#include <linux/rtnetlink.h>
13#include "ieee80211_i.h"
14#include "driver-ops.h"
15#include "rate.h"
16#include "debugfs.h"
17
18#define DEBUGFS_FORMAT_BUFFER_SIZE 100
19
20int mac80211_format_buffer(char __user *userbuf, size_t count,
21 loff_t *ppos, char *fmt, ...)
22{
23 va_list args;
24 char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
25 int res;
26
27 va_start(args, fmt);
28 res = vscnprintf(buf, sizeof(buf), fmt, args);
29 va_end(args);
30
31 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
32}
33
34#define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \
35static ssize_t name## _read(struct file *file, char __user *userbuf, \
36 size_t count, loff_t *ppos) \
37{ \
38 struct ieee80211_local *local = file->private_data; \
39 \
40 return mac80211_format_buffer(userbuf, count, ppos, \
41 fmt "\n", ##value); \
42}
43
44#define DEBUGFS_READONLY_FILE_OPS(name) \
45static const struct file_operations name## _ops = { \
46 .read = name## _read, \
47 .open = simple_open, \
48 .llseek = generic_file_llseek, \
49};
50
51#define DEBUGFS_READONLY_FILE(name, fmt, value...) \
52 DEBUGFS_READONLY_FILE_FN(name, fmt, value) \
53 DEBUGFS_READONLY_FILE_OPS(name)
54
55#define DEBUGFS_ADD(name) \
56 debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
57
58#define DEBUGFS_ADD_MODE(name, mode) \
59 debugfs_create_file(#name, mode, phyd, local, &name## _ops);
60
61
62DEBUGFS_READONLY_FILE(user_power, "%d",
63 local->user_power_level);
64DEBUGFS_READONLY_FILE(power, "%d",
65 local->hw.conf.power_level);
66DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
67 local->total_ps_buffered);
68DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
69 local->wep_iv & 0xffffff);
70DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
71 local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
72
73#ifdef CONFIG_PM
74static ssize_t reset_write(struct file *file, const char __user *user_buf,
75 size_t count, loff_t *ppos)
76{
77 struct ieee80211_local *local = file->private_data;
78
79 rtnl_lock();
80 __ieee80211_suspend(&local->hw, NULL);
81 __ieee80211_resume(&local->hw);
82 rtnl_unlock();
83
84 return count;
85}
86
87static const struct file_operations reset_ops = {
88 .write = reset_write,
89 .open = simple_open,
90 .llseek = noop_llseek,
91};
92#endif
93
94static const char *hw_flag_names[NUM_IEEE80211_HW_FLAGS + 1] = {
95#define FLAG(F) [IEEE80211_HW_##F] = #F
96 FLAG(HAS_RATE_CONTROL),
97 FLAG(RX_INCLUDES_FCS),
98 FLAG(HOST_BROADCAST_PS_BUFFERING),
99 FLAG(SIGNAL_UNSPEC),
100 FLAG(SIGNAL_DBM),
101 FLAG(NEED_DTIM_BEFORE_ASSOC),
102 FLAG(SPECTRUM_MGMT),
103 FLAG(AMPDU_AGGREGATION),
104 FLAG(SUPPORTS_PS),
105 FLAG(PS_NULLFUNC_STACK),
106 FLAG(SUPPORTS_DYNAMIC_PS),
107 FLAG(MFP_CAPABLE),
108 FLAG(WANT_MONITOR_VIF),
109 FLAG(NO_AUTO_VIF),
110 FLAG(SW_CRYPTO_CONTROL),
111 FLAG(SUPPORT_FAST_XMIT),
112 FLAG(REPORTS_TX_ACK_STATUS),
113 FLAG(CONNECTION_MONITOR),
114 FLAG(QUEUE_CONTROL),
115 FLAG(SUPPORTS_PER_STA_GTK),
116 FLAG(AP_LINK_PS),
117 FLAG(TX_AMPDU_SETUP_IN_HW),
118 FLAG(SUPPORTS_RC_TABLE),
119 FLAG(P2P_DEV_ADDR_FOR_INTF),
120 FLAG(TIMING_BEACON_ONLY),
121 FLAG(SUPPORTS_HT_CCK_RATES),
122 FLAG(CHANCTX_STA_CSA),
123 FLAG(SUPPORTS_CLONED_SKBS),
124 FLAG(SINGLE_SCAN_ON_ALL_BANDS),
125 FLAG(TDLS_WIDER_BW),
126
127 /* keep last for the build bug below */
128 (void *)0x1
129#undef FLAG
130};
131
132static ssize_t hwflags_read(struct file *file, char __user *user_buf,
133 size_t count, loff_t *ppos)
134{
135 struct ieee80211_local *local = file->private_data;
136 size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
137 char *buf = kzalloc(bufsz, GFP_KERNEL);
138 char *pos = buf, *end = buf + bufsz - 1;
139 ssize_t rv;
140 int i;
141
142 if (!buf)
143 return -ENOMEM;
144
145 /* fail compilation if somebody adds or removes
146 * a flag without updating the name array above
147 */
148 BUILD_BUG_ON(hw_flag_names[NUM_IEEE80211_HW_FLAGS] != (void *)0x1);
149
150 for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
151 if (test_bit(i, local->hw.flags))
152 pos += scnprintf(pos, end - pos, "%s\n",
153 hw_flag_names[i]);
154 }
155
156 rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
157 kfree(buf);
158 return rv;
159}
160
161static ssize_t queues_read(struct file *file, char __user *user_buf,
162 size_t count, loff_t *ppos)
163{
164 struct ieee80211_local *local = file->private_data;
165 unsigned long flags;
166 char buf[IEEE80211_MAX_QUEUES * 20];
167 int q, res = 0;
168
169 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
170 for (q = 0; q < local->hw.queues; q++)
171 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
172 local->queue_stop_reasons[q],
173 skb_queue_len(&local->pending[q]));
174 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
175
176 return simple_read_from_buffer(user_buf, count, ppos, buf, res);
177}
178
179DEBUGFS_READONLY_FILE_OPS(hwflags);
180DEBUGFS_READONLY_FILE_OPS(queues);
181
182/* statistics stuff */
183
184static ssize_t format_devstat_counter(struct ieee80211_local *local,
185 char __user *userbuf,
186 size_t count, loff_t *ppos,
187 int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
188 int buflen))
189{
190 struct ieee80211_low_level_stats stats;
191 char buf[20];
192 int res;
193
194 rtnl_lock();
195 res = drv_get_stats(local, &stats);
196 rtnl_unlock();
197 if (res)
198 return res;
199 res = printvalue(&stats, buf, sizeof(buf));
200 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
201}
202
203#define DEBUGFS_DEVSTATS_FILE(name) \
204static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
205 char *buf, int buflen) \
206{ \
207 return scnprintf(buf, buflen, "%u\n", stats->name); \
208} \
209static ssize_t stats_ ##name## _read(struct file *file, \
210 char __user *userbuf, \
211 size_t count, loff_t *ppos) \
212{ \
213 return format_devstat_counter(file->private_data, \
214 userbuf, \
215 count, \
216 ppos, \
217 print_devstats_##name); \
218} \
219 \
220static const struct file_operations stats_ ##name## _ops = { \
221 .read = stats_ ##name## _read, \
222 .open = simple_open, \
223 .llseek = generic_file_llseek, \
224};
225
226#define DEBUGFS_STATS_ADD(name) \
227 debugfs_create_u32(#name, 0400, statsd, &local->name);
228#define DEBUGFS_DEVSTATS_ADD(name) \
229 debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
230
231DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
232DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
233DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
234DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
235
236void debugfs_hw_add(struct ieee80211_local *local)
237{
238 struct dentry *phyd = local->hw.wiphy->debugfsdir;
239 struct dentry *statsd;
240
241 if (!phyd)
242 return;
243
244 local->debugfs.keys = debugfs_create_dir("keys", phyd);
245
246 DEBUGFS_ADD(total_ps_buffered);
247 DEBUGFS_ADD(wep_iv);
248 DEBUGFS_ADD(queues);
249#ifdef CONFIG_PM
250 DEBUGFS_ADD_MODE(reset, 0200);
251#endif
252 DEBUGFS_ADD(hwflags);
253 DEBUGFS_ADD(user_power);
254 DEBUGFS_ADD(power);
255
256 statsd = debugfs_create_dir("statistics", phyd);
257
258 /* if the dir failed, don't put all the other things into the root! */
259 if (!statsd)
260 return;
261
262#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
263 DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
264 DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
265 DEBUGFS_STATS_ADD(dot11FailedCount);
266 DEBUGFS_STATS_ADD(dot11RetryCount);
267 DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
268 DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
269 DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
270 DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
271 DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
272 DEBUGFS_STATS_ADD(tx_handlers_drop);
273 DEBUGFS_STATS_ADD(tx_handlers_queued);
274 DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
275 DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
276 DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
277 DEBUGFS_STATS_ADD(rx_handlers_drop);
278 DEBUGFS_STATS_ADD(rx_handlers_queued);
279 DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
280 DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
281 DEBUGFS_STATS_ADD(tx_expand_skb_head);
282 DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
283 DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
284 DEBUGFS_STATS_ADD(rx_handlers_fragments);
285 DEBUGFS_STATS_ADD(tx_status_drop);
286#endif
287 DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
288 DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
289 DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
290 DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
291}