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// SPDX-License-Identifier: GPL-2.0-only
/*
* This file is part of wl1271
*
* Copyright (C) 2008-2009 Nokia Corporation
*
* Contact: Luciano Coelho <luciano.coelho@nokia.com>
*/
#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();
}
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