1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2006, Johannes Berg <johannes@sipsolutions.net>
4 */
5
6 /* just for IFNAMSIZ */
7 #include <linux/if.h>
8 #include <linux/slab.h>
9 #include <linux/export.h>
10 #include "led.h"
11
12 void ieee80211_led_assoc(struct ieee80211_local *local, bool associated)
13 {
14 if (!atomic_read(&local->assoc_led_active))
15 return;
16 if (associated)
17 led_trigger_event(&local->assoc_led, LED_FULL);
18 else
19 led_trigger_event(&local->assoc_led, LED_OFF);
20 }
21
22 void ieee80211_led_radio(struct ieee80211_local *local, bool enabled)
23 {
24 if (!atomic_read(&local->radio_led_active))
25 return;
26 if (enabled)
27 led_trigger_event(&local->radio_led, LED_FULL);
28 else
29 led_trigger_event(&local->radio_led, LED_OFF);
30 }
31
32 void ieee80211_alloc_led_names(struct ieee80211_local *local)
33 {
34 local->rx_led.name = kasprintf(GFP_KERNEL, "%srx",
35 wiphy_name(local->hw.wiphy));
36 local->tx_led.name = kasprintf(GFP_KERNEL, "%stx",
37 wiphy_name(local->hw.wiphy));
38 local->assoc_led.name = kasprintf(GFP_KERNEL, "%sassoc",
39 wiphy_name(local->hw.wiphy));
40 local->radio_led.name = kasprintf(GFP_KERNEL, "%sradio",
41 wiphy_name(local->hw.wiphy));
42 }
43
44 void ieee80211_free_led_names(struct ieee80211_local *local)
45 {
46 kfree(local->rx_led.name);
47 kfree(local->tx_led.name);
48 kfree(local->assoc_led.name);
49 kfree(local->radio_led.name);
50 }
51
52 static int ieee80211_tx_led_activate(struct led_classdev *led_cdev)
53 {
54 struct ieee80211_local *local = container_of(led_cdev->trigger,
55 struct ieee80211_local,
56 tx_led);
57
58 atomic_inc(&local->tx_led_active);
59
60 return 0;
61 }
62
63 static void ieee80211_tx_led_deactivate(struct led_classdev *led_cdev)
64 {
65 struct ieee80211_local *local = container_of(led_cdev->trigger,
66 struct ieee80211_local,
67 tx_led);
68
69 atomic_dec(&local->tx_led_active);
70 }
71
72 static int ieee80211_rx_led_activate(struct led_classdev *led_cdev)
73 {
74 struct ieee80211_local *local = container_of(led_cdev->trigger,
75 struct ieee80211_local,
76 rx_led);
77
78 atomic_inc(&local->rx_led_active);
79
80 return 0;
81 }
82
83 static void ieee80211_rx_led_deactivate(struct led_classdev *led_cdev)
84 {
85 struct ieee80211_local *local = container_of(led_cdev->trigger,
86 struct ieee80211_local,
87 rx_led);
88
89 atomic_dec(&local->rx_led_active);
90 }
91
92 static int ieee80211_assoc_led_activate(struct led_classdev *led_cdev)
93 {
94 struct ieee80211_local *local = container_of(led_cdev->trigger,
95 struct ieee80211_local,
96 assoc_led);
97
98 atomic_inc(&local->assoc_led_active);
99
100 return 0;
101 }
102
103 static void ieee80211_assoc_led_deactivate(struct led_classdev *led_cdev)
104 {
105 struct ieee80211_local *local = container_of(led_cdev->trigger,
106 struct ieee80211_local,
107 assoc_led);
108
109 atomic_dec(&local->assoc_led_active);
110 }
111
112 static int ieee80211_radio_led_activate(struct led_classdev *led_cdev)
113 {
114 struct ieee80211_local *local = container_of(led_cdev->trigger,
115 struct ieee80211_local,
116 radio_led);
117
118 atomic_inc(&local->radio_led_active);
119
120 return 0;
121 }
122
123 static void ieee80211_radio_led_deactivate(struct led_classdev *led_cdev)
124 {
125 struct ieee80211_local *local = container_of(led_cdev->trigger,
126 struct ieee80211_local,
127 radio_led);
128
129 atomic_dec(&local->radio_led_active);
130 }
131
132 static int ieee80211_tpt_led_activate(struct led_classdev *led_cdev)
133 {
134 struct ieee80211_local *local = container_of(led_cdev->trigger,
135 struct ieee80211_local,
136 tpt_led);
137
138 atomic_inc(&local->tpt_led_active);
139
140 return 0;
141 }
142
143 static void ieee80211_tpt_led_deactivate(struct led_classdev *led_cdev)
144 {
145 struct ieee80211_local *local = container_of(led_cdev->trigger,
146 struct ieee80211_local,
147 tpt_led);
148
149 atomic_dec(&local->tpt_led_active);
150 }
151
152 void ieee80211_led_init(struct ieee80211_local *local)
153 {
154 atomic_set(&local->rx_led_active, 0);
155 local->rx_led.activate = ieee80211_rx_led_activate;
156 local->rx_led.deactivate = ieee80211_rx_led_deactivate;
157 if (local->rx_led.name && led_trigger_register(&local->rx_led)) {
158 kfree(local->rx_led.name);
159 local->rx_led.name = NULL;
160 }
161
162 atomic_set(&local->tx_led_active, 0);
163 local->tx_led.activate = ieee80211_tx_led_activate;
164 local->tx_led.deactivate = ieee80211_tx_led_deactivate;
165 if (local->tx_led.name && led_trigger_register(&local->tx_led)) {
166 kfree(local->tx_led.name);
167 local->tx_led.name = NULL;
168 }
169
170 atomic_set(&local->assoc_led_active, 0);
171 local->assoc_led.activate = ieee80211_assoc_led_activate;
172 local->assoc_led.deactivate = ieee80211_assoc_led_deactivate;
173 if (local->assoc_led.name && led_trigger_register(&local->assoc_led)) {
174 kfree(local->assoc_led.name);
175 local->assoc_led.name = NULL;
176 }
177
178 atomic_set(&local->radio_led_active, 0);
179 local->radio_led.activate = ieee80211_radio_led_activate;
180 local->radio_led.deactivate = ieee80211_radio_led_deactivate;
181 if (local->radio_led.name && led_trigger_register(&local->radio_led)) {
182 kfree(local->radio_led.name);
183 local->radio_led.name = NULL;
184 }
185
186 atomic_set(&local->tpt_led_active, 0);
187 if (local->tpt_led_trigger) {
188 local->tpt_led.activate = ieee80211_tpt_led_activate;
189 local->tpt_led.deactivate = ieee80211_tpt_led_deactivate;
190 if (led_trigger_register(&local->tpt_led)) {
191 kfree(local->tpt_led_trigger);
192 local->tpt_led_trigger = NULL;
193 }
194 }
195 }
196
197 void ieee80211_led_exit(struct ieee80211_local *local)
198 {
199 if (local->radio_led.name)
200 led_trigger_unregister(&local->radio_led);
201 if (local->assoc_led.name)
202 led_trigger_unregister(&local->assoc_led);
203 if (local->tx_led.name)
204 led_trigger_unregister(&local->tx_led);
205 if (local->rx_led.name)
206 led_trigger_unregister(&local->rx_led);
207
208 if (local->tpt_led_trigger) {
209 led_trigger_unregister(&local->tpt_led);
210 kfree(local->tpt_led_trigger);
211 }
212 }
213
214 const char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw)
215 {
216 struct ieee80211_local *local = hw_to_local(hw);
217
218 return local->radio_led.name;
219 }
220 EXPORT_SYMBOL(__ieee80211_get_radio_led_name);
221
222 const char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw)
223 {
224 struct ieee80211_local *local = hw_to_local(hw);
225
226 return local->assoc_led.name;
227 }
228 EXPORT_SYMBOL(__ieee80211_get_assoc_led_name);
229
230 const char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
231 {
232 struct ieee80211_local *local = hw_to_local(hw);
233
234 return local->tx_led.name;
235 }
236 EXPORT_SYMBOL(__ieee80211_get_tx_led_name);
237
238 const char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
239 {
240 struct ieee80211_local *local = hw_to_local(hw);
241
242 return local->rx_led.name;
243 }
244 EXPORT_SYMBOL(__ieee80211_get_rx_led_name);
245
246 static unsigned long tpt_trig_traffic(struct ieee80211_local *local,
247 struct tpt_led_trigger *tpt_trig)
248 {
249 unsigned long traffic, delta;
250
251 traffic = tpt_trig->tx_bytes + tpt_trig->rx_bytes;
252
253 delta = traffic - tpt_trig->prev_traffic;
254 tpt_trig->prev_traffic = traffic;
255 return DIV_ROUND_UP(delta, 1024 / 8);
256 }
257
258 static void tpt_trig_timer(struct timer_list *t)
259 {
260 struct tpt_led_trigger *tpt_trig = from_timer(tpt_trig, t, timer);
261 struct ieee80211_local *local = tpt_trig->local;
262 unsigned long on, off, tpt;
263 int i;
264
265 if (!tpt_trig->running)
266 return;
267
268 mod_timer(&tpt_trig->timer, round_jiffies(jiffies + HZ));
269
270 tpt = tpt_trig_traffic(local, tpt_trig);
271
272 /* default to just solid on */
273 on = 1;
274 off = 0;
275
276 for (i = tpt_trig->blink_table_len - 1; i >= 0; i--) {
277 if (tpt_trig->blink_table[i].throughput < 0 ||
278 tpt > tpt_trig->blink_table[i].throughput) {
279 off = tpt_trig->blink_table[i].blink_time / 2;
280 on = tpt_trig->blink_table[i].blink_time - off;
281 break;
282 }
283 }
284
285 led_trigger_blink(&local->tpt_led, on, off);
286 }
287
288 const char *
289 __ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw,
290 unsigned int flags,
291 const struct ieee80211_tpt_blink *blink_table,
292 unsigned int blink_table_len)
293 {
294 struct ieee80211_local *local = hw_to_local(hw);
295 struct tpt_led_trigger *tpt_trig;
296
297 if (WARN_ON(local->tpt_led_trigger))
298 return NULL;
299
300 tpt_trig = kzalloc(sizeof(struct tpt_led_trigger), GFP_KERNEL);
301 if (!tpt_trig)
302 return NULL;
303
304 snprintf(tpt_trig->name, sizeof(tpt_trig->name),
305 "%stpt", wiphy_name(local->hw.wiphy));
306
307 local->tpt_led.name = tpt_trig->name;
308
309 tpt_trig->blink_table = blink_table;
310 tpt_trig->blink_table_len = blink_table_len;
311 tpt_trig->want = flags;
312 tpt_trig->local = local;
313
314 timer_setup(&tpt_trig->timer, tpt_trig_timer, 0);
315
316 local->tpt_led_trigger = tpt_trig;
317
318 return tpt_trig->name;
319 }
320 EXPORT_SYMBOL(__ieee80211_create_tpt_led_trigger);
321
322 static void ieee80211_start_tpt_led_trig(struct ieee80211_local *local)
323 {
324 struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
325
326 if (tpt_trig->running)
327 return;
328
329 /* reset traffic */
330 tpt_trig_traffic(local, tpt_trig);
331 tpt_trig->running = true;
332
333 tpt_trig_timer(&tpt_trig->timer);
334 mod_timer(&tpt_trig->timer, round_jiffies(jiffies + HZ));
335 }
336
337 static void ieee80211_stop_tpt_led_trig(struct ieee80211_local *local)
338 {
339 struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
340
341 if (!tpt_trig->running)
342 return;
343
344 tpt_trig->running = false;
345 del_timer_sync(&tpt_trig->timer);
346
347 led_trigger_event(&local->tpt_led, LED_OFF);
348 }
349
350 void ieee80211_mod_tpt_led_trig(struct ieee80211_local *local,
351 unsigned int types_on, unsigned int types_off)
352 {
353 struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
354 bool allowed;
355
356 WARN_ON(types_on & types_off);
357
358 if (!tpt_trig)
359 return;
360
361 tpt_trig->active &= ~types_off;
362 tpt_trig->active |= types_on;
363
364 /*
365 * Regardless of wanted state, we shouldn't blink when
366 * the radio is disabled -- this can happen due to some
367 * code ordering issues with __ieee80211_recalc_idle()
368 * being called before the radio is started.
369 */
370 allowed = tpt_trig->active & IEEE80211_TPT_LEDTRIG_FL_RADIO;
371
372 if (!allowed || !(tpt_trig->active & tpt_trig->want))
373 ieee80211_stop_tpt_led_trig(local);
374 else
375 ieee80211_start_tpt_led_trig(local);
376 }
377
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