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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
43
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
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
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
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}
173
