Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * This file is part of wl1271
4 *
5 * Copyright (C) 2008-2009 Nokia Corporation
6 *
7 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
8 */
9
10#include "ps.h"
11#include "io.h"
12#include "tx.h"
13#include "debug.h"
14
15int wl1271_ps_set_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif,
16 enum wl1271_cmd_ps_mode mode)
17{
18 int ret;
19 u16 timeout = wl->conf.conn.dynamic_ps_timeout;
20
21 switch (mode) {
22 case STATION_AUTO_PS_MODE:
23 case STATION_POWER_SAVE_MODE:
24 wl1271_debug(DEBUG_PSM, "entering psm (mode=%d,timeout=%u)",
25 mode, timeout);
26
27 ret = wl1271_acx_wake_up_conditions(wl, wlvif,
28 wl->conf.conn.wake_up_event,
29 wl->conf.conn.listen_interval);
30 if (ret < 0) {
31 wl1271_error("couldn't set wake up conditions");
32 return ret;
33 }
34
35 ret = wl1271_cmd_ps_mode(wl, wlvif, mode, timeout);
36 if (ret < 0)
37 return ret;
38
39 set_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
40
41 /*
42 * enable beacon early termination.
43 * Not relevant for 5GHz and for high rates.
44 */
45 if ((wlvif->band == NL80211_BAND_2GHZ) &&
46 (wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
47 ret = wl1271_acx_bet_enable(wl, wlvif, true);
48 if (ret < 0)
49 return ret;
50 }
51 break;
52 case STATION_ACTIVE_MODE:
53 wl1271_debug(DEBUG_PSM, "leaving psm");
54
55 /* disable beacon early termination */
56 if ((wlvif->band == NL80211_BAND_2GHZ) &&
57 (wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
58 ret = wl1271_acx_bet_enable(wl, wlvif, false);
59 if (ret < 0)
60 return ret;
61 }
62
63 ret = wl1271_cmd_ps_mode(wl, wlvif, mode, 0);
64 if (ret < 0)
65 return ret;
66
67 clear_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
68 break;
69 default:
70 wl1271_warning("trying to set ps to unsupported mode %d", mode);
71 ret = -EINVAL;
72 }
73
74 return ret;
75}
76
77static void wl1271_ps_filter_frames(struct wl1271 *wl, u8 hlid)
78{
79 int i;
80 struct sk_buff *skb;
81 struct ieee80211_tx_info *info;
82 unsigned long flags;
83 int filtered[NUM_TX_QUEUES];
84 struct wl1271_link *lnk = &wl->links[hlid];
85
86 /* filter all frames currently in the low level queues for this hlid */
87 for (i = 0; i < NUM_TX_QUEUES; i++) {
88 filtered[i] = 0;
89 while ((skb = skb_dequeue(&lnk->tx_queue[i]))) {
90 filtered[i]++;
91
92 if (WARN_ON(wl12xx_is_dummy_packet(wl, skb)))
93 continue;
94
95 info = IEEE80211_SKB_CB(skb);
96 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
97 info->status.rates[0].idx = -1;
98 ieee80211_tx_status_ni(wl->hw, skb);
99 }
100 }
101
102 spin_lock_irqsave(&wl->wl_lock, flags);
103 for (i = 0; i < NUM_TX_QUEUES; i++) {
104 wl->tx_queue_count[i] -= filtered[i];
105 if (lnk->wlvif)
106 lnk->wlvif->tx_queue_count[i] -= filtered[i];
107 }
108 spin_unlock_irqrestore(&wl->wl_lock, flags);
109
110 wl1271_handle_tx_low_watermark(wl);
111}
112
113void wl12xx_ps_link_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
114 u8 hlid, bool clean_queues)
115{
116 struct ieee80211_sta *sta;
117 struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
118
119 if (WARN_ON_ONCE(wlvif->bss_type != BSS_TYPE_AP_BSS))
120 return;
121
122 if (!test_bit(hlid, wlvif->ap.sta_hlid_map) ||
123 test_bit(hlid, &wl->ap_ps_map))
124 return;
125
126 wl1271_debug(DEBUG_PSM, "start mac80211 PSM on hlid %d pkts %d "
127 "clean_queues %d", hlid, wl->links[hlid].allocated_pkts,
128 clean_queues);
129
130 rcu_read_lock();
131 sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
132 if (!sta) {
133 wl1271_error("could not find sta %pM for starting ps",
134 wl->links[hlid].addr);
135 rcu_read_unlock();
136 return;
137 }
138
139 ieee80211_sta_ps_transition_ni(sta, true);
140 rcu_read_unlock();
141
142 /* do we want to filter all frames from this link's queues? */
143 if (clean_queues)
144 wl1271_ps_filter_frames(wl, hlid);
145
146 __set_bit(hlid, &wl->ap_ps_map);
147}
148
149void wl12xx_ps_link_end(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 hlid)
150{
151 struct ieee80211_sta *sta;
152 struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
153
154 if (!test_bit(hlid, &wl->ap_ps_map))
155 return;
156
157 wl1271_debug(DEBUG_PSM, "end mac80211 PSM on hlid %d", hlid);
158
159 __clear_bit(hlid, &wl->ap_ps_map);
160
161 rcu_read_lock();
162 sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
163 if (!sta) {
164 wl1271_error("could not find sta %pM for ending ps",
165 wl->links[hlid].addr);
166 goto end;
167 }
168
169 ieee80211_sta_ps_transition_ni(sta, false);
170end:
171 rcu_read_unlock();
172}
1/*
2 * This file is part of wl1271
3 *
4 * Copyright (C) 2008-2009 Nokia Corporation
5 *
6 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 */
23
24#include "ps.h"
25#include "io.h"
26#include "tx.h"
27#include "debug.h"
28
29#define WL1271_WAKEUP_TIMEOUT 500
30
31void wl1271_elp_work(struct work_struct *work)
32{
33 struct delayed_work *dwork;
34 struct wl1271 *wl;
35 struct wl12xx_vif *wlvif;
36
37 dwork = container_of(work, struct delayed_work, work);
38 wl = container_of(dwork, struct wl1271, elp_work);
39
40 wl1271_debug(DEBUG_PSM, "elp work");
41
42 mutex_lock(&wl->mutex);
43
44 if (unlikely(wl->state == WL1271_STATE_OFF))
45 goto out;
46
47 /* our work might have been already cancelled */
48 if (unlikely(!test_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
49 goto out;
50
51 if (test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
52 goto out;
53
54 wl12xx_for_each_wlvif(wl, wlvif) {
55 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
56 goto out;
57
58 if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
59 test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
60 goto out;
61 }
62
63 wl1271_debug(DEBUG_PSM, "chip to elp");
64 wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_SLEEP);
65 set_bit(WL1271_FLAG_IN_ELP, &wl->flags);
66
67out:
68 mutex_unlock(&wl->mutex);
69}
70
71/* Routines to toggle sleep mode while in ELP */
72void wl1271_ps_elp_sleep(struct wl1271 *wl)
73{
74 struct wl12xx_vif *wlvif;
75
76 if (wl->quirks & WLCORE_QUIRK_NO_ELP)
77 return;
78
79 /* we shouldn't get consecutive sleep requests */
80 if (WARN_ON(test_and_set_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
81 return;
82
83 wl12xx_for_each_wlvif(wl, wlvif) {
84 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
85 return;
86
87 if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
88 test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
89 return;
90 }
91
92 ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
93 msecs_to_jiffies(wl->conf.conn.dynamic_ps_timeout));
94}
95
96int wl1271_ps_elp_wakeup(struct wl1271 *wl)
97{
98 DECLARE_COMPLETION_ONSTACK(compl);
99 unsigned long flags;
100 int ret;
101 u32 start_time = jiffies;
102 bool pending = false;
103
104 /*
105 * we might try to wake up even if we didn't go to sleep
106 * before (e.g. on boot)
107 */
108 if (!test_and_clear_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags))
109 return 0;
110
111 /* don't cancel_sync as it might contend for a mutex and deadlock */
112 cancel_delayed_work(&wl->elp_work);
113
114 if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
115 return 0;
116
117 wl1271_debug(DEBUG_PSM, "waking up chip from elp");
118
119 /*
120 * The spinlock is required here to synchronize both the work and
121 * the completion variable in one entity.
122 */
123 spin_lock_irqsave(&wl->wl_lock, flags);
124 if (test_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
125 pending = true;
126 else
127 wl->elp_compl = &compl;
128 spin_unlock_irqrestore(&wl->wl_lock, flags);
129
130 wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_WAKE_UP);
131
132 if (!pending) {
133 ret = wait_for_completion_timeout(
134 &compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
135 if (ret == 0) {
136 wl1271_error("ELP wakeup timeout!");
137 wl12xx_queue_recovery_work(wl);
138 ret = -ETIMEDOUT;
139 goto err;
140 } else if (ret < 0) {
141 wl1271_error("ELP wakeup completion error.");
142 goto err;
143 }
144 }
145
146 clear_bit(WL1271_FLAG_IN_ELP, &wl->flags);
147
148 wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
149 jiffies_to_msecs(jiffies - start_time));
150 goto out;
151
152err:
153 spin_lock_irqsave(&wl->wl_lock, flags);
154 wl->elp_compl = NULL;
155 spin_unlock_irqrestore(&wl->wl_lock, flags);
156 return ret;
157
158out:
159 return 0;
160}
161
162int wl1271_ps_set_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif,
163 enum wl1271_cmd_ps_mode mode)
164{
165 int ret;
166 u16 timeout = wl->conf.conn.dynamic_ps_timeout;
167
168 switch (mode) {
169 case STATION_AUTO_PS_MODE:
170 case STATION_POWER_SAVE_MODE:
171 wl1271_debug(DEBUG_PSM, "entering psm (mode=%d,timeout=%u)",
172 mode, timeout);
173
174 ret = wl1271_acx_wake_up_conditions(wl, wlvif,
175 wl->conf.conn.wake_up_event,
176 wl->conf.conn.listen_interval);
177 if (ret < 0) {
178 wl1271_error("couldn't set wake up conditions");
179 return ret;
180 }
181
182 ret = wl1271_cmd_ps_mode(wl, wlvif, mode, timeout);
183 if (ret < 0)
184 return ret;
185
186 set_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
187
188 /* enable beacon early termination. Not relevant for 5GHz */
189 if (wlvif->band == IEEE80211_BAND_2GHZ) {
190 ret = wl1271_acx_bet_enable(wl, wlvif, true);
191 if (ret < 0)
192 return ret;
193 }
194 break;
195 case STATION_ACTIVE_MODE:
196 wl1271_debug(DEBUG_PSM, "leaving psm");
197
198 /* disable beacon early termination */
199 if (wlvif->band == IEEE80211_BAND_2GHZ) {
200 ret = wl1271_acx_bet_enable(wl, wlvif, false);
201 if (ret < 0)
202 return ret;
203 }
204
205 ret = wl1271_cmd_ps_mode(wl, wlvif, mode, 0);
206 if (ret < 0)
207 return ret;
208
209 clear_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
210 break;
211 default:
212 wl1271_warning("trying to set ps to unsupported mode %d", mode);
213 ret = -EINVAL;
214 }
215
216 return ret;
217}
218
219static void wl1271_ps_filter_frames(struct wl1271 *wl, u8 hlid)
220{
221 int i;
222 struct sk_buff *skb;
223 struct ieee80211_tx_info *info;
224 unsigned long flags;
225 int filtered[NUM_TX_QUEUES];
226
227 /* filter all frames currently in the low level queues for this hlid */
228 for (i = 0; i < NUM_TX_QUEUES; i++) {
229 filtered[i] = 0;
230 while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) {
231 filtered[i]++;
232
233 if (WARN_ON(wl12xx_is_dummy_packet(wl, skb)))
234 continue;
235
236 info = IEEE80211_SKB_CB(skb);
237 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
238 info->status.rates[0].idx = -1;
239 ieee80211_tx_status_ni(wl->hw, skb);
240 }
241 }
242
243 spin_lock_irqsave(&wl->wl_lock, flags);
244 for (i = 0; i < NUM_TX_QUEUES; i++)
245 wl->tx_queue_count[i] -= filtered[i];
246 spin_unlock_irqrestore(&wl->wl_lock, flags);
247
248 wl1271_handle_tx_low_watermark(wl);
249}
250
251void wl12xx_ps_link_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
252 u8 hlid, bool clean_queues)
253{
254 struct ieee80211_sta *sta;
255 struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
256
257 if (test_bit(hlid, &wl->ap_ps_map))
258 return;
259
260 wl1271_debug(DEBUG_PSM, "start mac80211 PSM on hlid %d pkts %d "
261 "clean_queues %d", hlid, wl->links[hlid].allocated_pkts,
262 clean_queues);
263
264 rcu_read_lock();
265 sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
266 if (!sta) {
267 wl1271_error("could not find sta %pM for starting ps",
268 wl->links[hlid].addr);
269 rcu_read_unlock();
270 return;
271 }
272
273 ieee80211_sta_ps_transition_ni(sta, true);
274 rcu_read_unlock();
275
276 /* do we want to filter all frames from this link's queues? */
277 if (clean_queues)
278 wl1271_ps_filter_frames(wl, hlid);
279
280 __set_bit(hlid, &wl->ap_ps_map);
281}
282
283void wl12xx_ps_link_end(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 hlid)
284{
285 struct ieee80211_sta *sta;
286 struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
287
288 if (!test_bit(hlid, &wl->ap_ps_map))
289 return;
290
291 wl1271_debug(DEBUG_PSM, "end mac80211 PSM on hlid %d", hlid);
292
293 __clear_bit(hlid, &wl->ap_ps_map);
294
295 rcu_read_lock();
296 sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
297 if (!sta) {
298 wl1271_error("could not find sta %pM for ending ps",
299 wl->links[hlid].addr);
300 goto end;
301 }
302
303 ieee80211_sta_ps_transition_ni(sta, false);
304end:
305 rcu_read_unlock();
306}