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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2006, Johannes Berg <[email protected]>
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
12void 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
22void 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
32void 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
44void 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
52static 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
63static 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
72static 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
83static 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
92static 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
103static 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
112static 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
123static 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
132static 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
143static 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
152void 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
197void 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
214const 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}
220EXPORT_SYMBOL(__ieee80211_get_radio_led_name);
221
222const 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}
228EXPORT_SYMBOL(__ieee80211_get_assoc_led_name);
229
230const 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}
236EXPORT_SYMBOL(__ieee80211_get_tx_led_name);
237
238const 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}
244EXPORT_SYMBOL(__ieee80211_get_rx_led_name);
245
246static 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
258static void tpt_trig_timer(struct timer_list *t)
259{
260 struct tpt_led_trigger *tpt_trig = timer_container_of(tpt_trig, t,
261 timer);
262 struct ieee80211_local *local = tpt_trig->local;
263 unsigned long on, off, tpt;
264 int i;
265
266 if (!tpt_trig->running)
267 return;
268
269 mod_timer(&tpt_trig->timer, round_jiffies(jiffies + HZ));
270
271 tpt = tpt_trig_traffic(local, tpt_trig);
272
273 /* default to just solid on */
274 on = 1;
275 off = 0;
276
277 for (i = tpt_trig->blink_table_len - 1; i >= 0; i--) {
278 if (tpt_trig->blink_table[i].throughput < 0 ||
279 tpt > tpt_trig->blink_table[i].throughput) {
280 off = tpt_trig->blink_table[i].blink_time / 2;
281 on = tpt_trig->blink_table[i].blink_time - off;
282 break;
283 }
284 }
285
286 led_trigger_blink(&local->tpt_led, on, off);
287}
288
289const char *
290__ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw,
291 unsigned int flags,
292 const struct ieee80211_tpt_blink *blink_table,
293 unsigned int blink_table_len)
294{
295 struct ieee80211_local *local = hw_to_local(hw);
296 struct tpt_led_trigger *tpt_trig;
297
298 if (WARN_ON(local->tpt_led_trigger))
299 return NULL;
300
301 tpt_trig = kzalloc_obj(struct tpt_led_trigger);
302 if (!tpt_trig)
303 return NULL;
304
305 snprintf(tpt_trig->name, sizeof(tpt_trig->name),
306 "%stpt", wiphy_name(local->hw.wiphy));
307
308 local->tpt_led.name = tpt_trig->name;
309
310 tpt_trig->blink_table = blink_table;
311 tpt_trig->blink_table_len = blink_table_len;
312 tpt_trig->want = flags;
313 tpt_trig->local = local;
314
315 timer_setup(&tpt_trig->timer, tpt_trig_timer, 0);
316
317 local->tpt_led_trigger = tpt_trig;
318
319 return tpt_trig->name;
320}
321EXPORT_SYMBOL(__ieee80211_create_tpt_led_trigger);
322
323static void ieee80211_start_tpt_led_trig(struct ieee80211_local *local)
324{
325 struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
326
327 if (tpt_trig->running)
328 return;
329
330 /* reset traffic */
331 tpt_trig_traffic(local, tpt_trig);
332 tpt_trig->running = true;
333
334 tpt_trig_timer(&tpt_trig->timer);
335 mod_timer(&tpt_trig->timer, round_jiffies(jiffies + HZ));
336}
337
338static void ieee80211_stop_tpt_led_trig(struct ieee80211_local *local)
339{
340 struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
341
342 if (!tpt_trig->running)
343 return;
344
345 tpt_trig->running = false;
346 timer_delete_sync(&tpt_trig->timer);
347
348 led_trigger_event(&local->tpt_led, LED_OFF);
349}
350
351void ieee80211_mod_tpt_led_trig(struct ieee80211_local *local,
352 unsigned int types_on, unsigned int types_off)
353{
354 struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
355 bool allowed;
356
357 WARN_ON(types_on & types_off);
358
359 if (!tpt_trig)
360 return;
361
362 tpt_trig->active &= ~types_off;
363 tpt_trig->active |= types_on;
364
365 /*
366 * Regardless of wanted state, we shouldn't blink when
367 * the radio is disabled -- this can happen due to some
368 * code ordering issues with __ieee80211_recalc_idle()
369 * being called before the radio is started.
370 */
371 allowed = tpt_trig->active & IEEE80211_TPT_LEDTRIG_FL_RADIO;
372
373 if (!allowed || !(tpt_trig->active & tpt_trig->want))
374 ieee80211_stop_tpt_led_trig(local);
375 else
376 ieee80211_start_tpt_led_trig(local);
377}