diff options
Diffstat (limited to 'drivers/net/wireless/ti/wlcore/ps.c')
| -rw-r--r-- | drivers/net/wireless/ti/wlcore/ps.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/drivers/net/wireless/ti/wlcore/ps.c b/drivers/net/wireless/ti/wlcore/ps.c new file mode 100644 index 0000000..9de843d --- /dev/null +++ b/drivers/net/wireless/ti/wlcore/ps.c @@ -0,0 +1,186 @@ +/* + * This file is part of wl1271 + * + * Copyright (C) 2008-2009 Nokia Corporation + * + * Contact: Luciano Coelho <luciano.coelho@nokia.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include "ps.h" +#include "io.h" +#include "tx.h" +#include "debug.h" + +int wl1271_ps_set_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif, + enum wl1271_cmd_ps_mode mode) +{ + int ret; + u16 timeout = wl->conf.conn.dynamic_ps_timeout; + + switch (mode) { + case STATION_AUTO_PS_MODE: + case STATION_POWER_SAVE_MODE: + wl1271_debug(DEBUG_PSM, "entering psm (mode=%d,timeout=%u)", + mode, timeout); + + ret = wl1271_acx_wake_up_conditions(wl, wlvif, + wl->conf.conn.wake_up_event, + wl->conf.conn.listen_interval); + if (ret < 0) { + wl1271_error("couldn't set wake up conditions"); + return ret; + } + + ret = wl1271_cmd_ps_mode(wl, wlvif, mode, timeout); + if (ret < 0) + return ret; + + set_bit(WLVIF_FLAG_IN_PS, &wlvif->flags); + + /* + * enable beacon early termination. + * Not relevant for 5GHz and for high rates. + */ + if ((wlvif->band == NL80211_BAND_2GHZ) && + (wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) { + ret = wl1271_acx_bet_enable(wl, wlvif, true); + if (ret < 0) + return ret; + } + break; + case STATION_ACTIVE_MODE: + wl1271_debug(DEBUG_PSM, "leaving psm"); + + /* disable beacon early termination */ + if ((wlvif->band == NL80211_BAND_2GHZ) && + (wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) { + ret = wl1271_acx_bet_enable(wl, wlvif, false); + if (ret < 0) + return ret; + } + + ret = wl1271_cmd_ps_mode(wl, wlvif, mode, 0); + if (ret < 0) + return ret; + + clear_bit(WLVIF_FLAG_IN_PS, &wlvif->flags); + break; + default: + wl1271_warning("trying to set ps to unsupported mode %d", mode); + ret = -EINVAL; + } + + return ret; +} + +static void wl1271_ps_filter_frames(struct wl1271 *wl, u8 hlid) +{ + int i; + struct sk_buff *skb; + struct ieee80211_tx_info *info; + unsigned long flags; + int filtered[NUM_TX_QUEUES]; + struct wl1271_link *lnk = &wl->links[hlid]; + + /* filter all frames currently in the low level queues for this hlid */ + for (i = 0; i < NUM_TX_QUEUES; i++) { + filtered[i] = 0; + while ((skb = skb_dequeue(&lnk->tx_queue[i]))) { + filtered[i]++; + + if (WARN_ON(wl12xx_is_dummy_packet(wl, skb))) + continue; + + info = IEEE80211_SKB_CB(skb); + info->flags |= IEEE80211_TX_STAT_TX_FILTERED; + info->status.rates[0].idx = -1; + ieee80211_tx_status_ni(wl->hw, skb); + } + } + + spin_lock_irqsave(&wl->wl_lock, flags); + for (i = 0; i < NUM_TX_QUEUES; i++) { + wl->tx_queue_count[i] -= filtered[i]; + if (lnk->wlvif) + lnk->wlvif->tx_queue_count[i] -= filtered[i]; + } + spin_unlock_irqrestore(&wl->wl_lock, flags); + + wl1271_handle_tx_low_watermark(wl); +} + +void wl12xx_ps_link_start(struct wl1271 *wl, struct wl12xx_vif *wlvif, + u8 hlid, bool clean_queues) +{ + struct ieee80211_sta *sta; + struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif); + + if (WARN_ON_ONCE(wlvif->bss_type != BSS_TYPE_AP_BSS)) + return; + + if (!test_bit(hlid, wlvif->ap.sta_hlid_map) || + test_bit(hlid, &wl->ap_ps_map)) + return; + + wl1271_debug(DEBUG_PSM, "start mac80211 PSM on hlid %d pkts %d " + "clean_queues %d", hlid, wl->links[hlid].allocated_pkts, + clean_queues); + + rcu_read_lock(); + sta = ieee80211_find_sta(vif, wl->links[hlid].addr); + if (!sta) { + wl1271_error("could not find sta %pM for starting ps", + wl->links[hlid].addr); + rcu_read_unlock(); + return; + } + + ieee80211_sta_ps_transition_ni(sta, true); + rcu_read_unlock(); + + /* do we want to filter all frames from this link's queues? */ + if (clean_queues) + wl1271_ps_filter_frames(wl, hlid); + + __set_bit(hlid, &wl->ap_ps_map); +} + +void wl12xx_ps_link_end(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 hlid) +{ + struct ieee80211_sta *sta; + struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif); + + if (!test_bit(hlid, &wl->ap_ps_map)) + return; + + wl1271_debug(DEBUG_PSM, "end mac80211 PSM on hlid %d", hlid); + + __clear_bit(hlid, &wl->ap_ps_map); + + rcu_read_lock(); + sta = ieee80211_find_sta(vif, wl->links[hlid].addr); + if (!sta) { + wl1271_error("could not find sta %pM for ending ps", + wl->links[hlid].addr); + goto end; + } + + ieee80211_sta_ps_transition_ni(sta, false); +end: + rcu_read_unlock(); +} |