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24#include "ps.h"
25#include "io.h"
26#include "tx.h"
27#include "debug.h"
28
29#define WL1271_WAKEUP_TIMEOUT 500
30
31#define ELP_ENTRY_DELAY 30
32
33void wl1271_elp_work(struct work_struct *work)
34{
35 struct delayed_work *dwork;
36 struct wl1271 *wl;
37 struct wl12xx_vif *wlvif;
38 int ret;
39
40 dwork = container_of(work, struct delayed_work, work);
41 wl = container_of(dwork, struct wl1271, elp_work);
42
43 wl1271_debug(DEBUG_PSM, "elp work");
44
45 mutex_lock(&wl->mutex);
46
47 if (unlikely(wl->state != WLCORE_STATE_ON))
48 goto out;
49
50
51 if (unlikely(!test_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
52 goto out;
53
54 if (test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
55 goto out;
56
57 wl12xx_for_each_wlvif(wl, wlvif) {
58 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
59 goto out;
60
61 if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
62 test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
63 goto out;
64 }
65
66 wl1271_debug(DEBUG_PSM, "chip to elp");
67 ret = wlcore_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_SLEEP);
68 if (ret < 0) {
69 wl12xx_queue_recovery_work(wl);
70 goto out;
71 }
72
73 set_bit(WL1271_FLAG_IN_ELP, &wl->flags);
74
75out:
76 mutex_unlock(&wl->mutex);
77}
78
79
80void wl1271_ps_elp_sleep(struct wl1271 *wl)
81{
82 struct wl12xx_vif *wlvif;
83 u32 timeout;
84
85 if (wl->sleep_auth != WL1271_PSM_ELP)
86 return;
87
88
89 if (WARN_ON(test_and_set_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
90 return;
91
92 wl12xx_for_each_wlvif(wl, wlvif) {
93 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
94 return;
95
96 if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
97 test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
98 return;
99 }
100
101 timeout = ELP_ENTRY_DELAY;
102 ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
103 msecs_to_jiffies(timeout));
104}
105
106int wl1271_ps_elp_wakeup(struct wl1271 *wl)
107{
108 DECLARE_COMPLETION_ONSTACK(compl);
109 unsigned long flags;
110 int ret;
111 u32 start_time = jiffies;
112 bool pending = false;
113
114
115
116
117
118 if (!test_and_clear_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags))
119 return 0;
120
121
122 cancel_delayed_work(&wl->elp_work);
123
124 if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
125 return 0;
126
127 wl1271_debug(DEBUG_PSM, "waking up chip from elp");
128
129
130
131
132
133 spin_lock_irqsave(&wl->wl_lock, flags);
134 if (test_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
135 pending = true;
136 else
137 wl->elp_compl = &compl;
138 spin_unlock_irqrestore(&wl->wl_lock, flags);
139
140 ret = wlcore_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_WAKE_UP);
141 if (ret < 0) {
142 wl12xx_queue_recovery_work(wl);
143 goto err;
144 }
145
146 if (!pending) {
147 ret = wait_for_completion_timeout(
148 &compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
149 if (ret == 0) {
150 wl1271_error("ELP wakeup timeout!");
151 wl12xx_queue_recovery_work(wl);
152 ret = -ETIMEDOUT;
153 goto err;
154 }
155 }
156
157 clear_bit(WL1271_FLAG_IN_ELP, &wl->flags);
158
159 wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
160 jiffies_to_msecs(jiffies - start_time));
161 goto out;
162
163err:
164 spin_lock_irqsave(&wl->wl_lock, flags);
165 wl->elp_compl = NULL;
166 spin_unlock_irqrestore(&wl->wl_lock, flags);
167 return ret;
168
169out:
170 return 0;
171}
172
173int wl1271_ps_set_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif,
174 enum wl1271_cmd_ps_mode mode)
175{
176 int ret;
177 u16 timeout = wl->conf.conn.dynamic_ps_timeout;
178
179 switch (mode) {
180 case STATION_AUTO_PS_MODE:
181 case STATION_POWER_SAVE_MODE:
182 wl1271_debug(DEBUG_PSM, "entering psm (mode=%d,timeout=%u)",
183 mode, timeout);
184
185 ret = wl1271_acx_wake_up_conditions(wl, wlvif,
186 wl->conf.conn.wake_up_event,
187 wl->conf.conn.listen_interval);
188 if (ret < 0) {
189 wl1271_error("couldn't set wake up conditions");
190 return ret;
191 }
192
193 ret = wl1271_cmd_ps_mode(wl, wlvif, mode, timeout);
194 if (ret < 0)
195 return ret;
196
197 set_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
198
199
200
201
202
203 if ((wlvif->band == IEEE80211_BAND_2GHZ) &&
204 (wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
205 ret = wl1271_acx_bet_enable(wl, wlvif, true);
206 if (ret < 0)
207 return ret;
208 }
209 break;
210 case STATION_ACTIVE_MODE:
211 wl1271_debug(DEBUG_PSM, "leaving psm");
212
213
214 if ((wlvif->band == IEEE80211_BAND_2GHZ) &&
215 (wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
216 ret = wl1271_acx_bet_enable(wl, wlvif, false);
217 if (ret < 0)
218 return ret;
219 }
220
221 ret = wl1271_cmd_ps_mode(wl, wlvif, mode, 0);
222 if (ret < 0)
223 return ret;
224
225 clear_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
226 break;
227 default:
228 wl1271_warning("trying to set ps to unsupported mode %d", mode);
229 ret = -EINVAL;
230 }
231
232 return ret;
233}
234
235static void wl1271_ps_filter_frames(struct wl1271 *wl, u8 hlid)
236{
237 int i;
238 struct sk_buff *skb;
239 struct ieee80211_tx_info *info;
240 unsigned long flags;
241 int filtered[NUM_TX_QUEUES];
242 struct wl1271_link *lnk = &wl->links[hlid];
243
244
245 for (i = 0; i < NUM_TX_QUEUES; i++) {
246 filtered[i] = 0;
247 while ((skb = skb_dequeue(&lnk->tx_queue[i]))) {
248 filtered[i]++;
249
250 if (WARN_ON(wl12xx_is_dummy_packet(wl, skb)))
251 continue;
252
253 info = IEEE80211_SKB_CB(skb);
254 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
255 info->status.rates[0].idx = -1;
256 ieee80211_tx_status_ni(wl->hw, skb);
257 }
258 }
259
260 spin_lock_irqsave(&wl->wl_lock, flags);
261 for (i = 0; i < NUM_TX_QUEUES; i++) {
262 wl->tx_queue_count[i] -= filtered[i];
263 if (lnk->wlvif)
264 lnk->wlvif->tx_queue_count[i] -= filtered[i];
265 }
266 spin_unlock_irqrestore(&wl->wl_lock, flags);
267
268 wl1271_handle_tx_low_watermark(wl);
269}
270
271void wl12xx_ps_link_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
272 u8 hlid, bool clean_queues)
273{
274 struct ieee80211_sta *sta;
275 struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
276
277 if (test_bit(hlid, &wl->ap_ps_map))
278 return;
279
280 wl1271_debug(DEBUG_PSM, "start mac80211 PSM on hlid %d pkts %d "
281 "clean_queues %d", hlid, wl->links[hlid].allocated_pkts,
282 clean_queues);
283
284 rcu_read_lock();
285 sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
286 if (!sta) {
287 wl1271_error("could not find sta %pM for starting ps",
288 wl->links[hlid].addr);
289 rcu_read_unlock();
290 return;
291 }
292
293 ieee80211_sta_ps_transition_ni(sta, true);
294 rcu_read_unlock();
295
296
297 if (clean_queues)
298 wl1271_ps_filter_frames(wl, hlid);
299
300 __set_bit(hlid, &wl->ap_ps_map);
301}
302
303void wl12xx_ps_link_end(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 hlid)
304{
305 struct ieee80211_sta *sta;
306 struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
307
308 if (!test_bit(hlid, &wl->ap_ps_map))
309 return;
310
311 wl1271_debug(DEBUG_PSM, "end mac80211 PSM on hlid %d", hlid);
312
313 __clear_bit(hlid, &wl->ap_ps_map);
314
315 rcu_read_lock();
316 sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
317 if (!sta) {
318 wl1271_error("could not find sta %pM for ending ps",
319 wl->links[hlid].addr);
320 goto end;
321 }
322
323 ieee80211_sta_ps_transition_ni(sta, false);
324end:
325 rcu_read_unlock();
326}
327