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 15 int 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 77 static 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 } 112 113 void 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 } 148 149 void 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); 170 end: 171 rcu_read_unlock(); 172 } 173