mac80211: add HW flag for disabling auto link-PS in AP mode
When operating in AP mode the wl1271 hardware filters out null-data
packets as well as management packets. This makes it impossible for
mac80211 to monitor the PS mode by using the PM bit of incoming frames.
Implement a HW flag to indicate that mac80211 should ignore the PM bit.
In addition, expose ieee80211_sta_ps_transition() to make low-level
drivers capable of controlling PS-mode.
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 7185c93..d78d6fc 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1105,7 +1105,8 @@
atomic_inc(&sdata->bss->num_sta_ps);
set_sta_flags(sta, WLAN_STA_PS_STA);
- drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta);
+ if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
+ drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta);
#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
printk(KERN_DEBUG "%s: STA %pM aid %d enters power save mode\n",
sdata->name, sta->sta.addr, sta->sta.aid);
@@ -1134,6 +1135,27 @@
ieee80211_sta_ps_deliver_wakeup(sta);
}
+int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start)
+{
+ struct sta_info *sta_inf = container_of(sta, struct sta_info, sta);
+ bool in_ps;
+
+ WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS));
+
+ /* Don't let the same PS state be set twice */
+ in_ps = test_sta_flags(sta_inf, WLAN_STA_PS_STA);
+ if ((start && in_ps) || (!start && !in_ps))
+ return -EINVAL;
+
+ if (start)
+ ap_sta_ps_start(sta_inf);
+ else
+ ap_sta_ps_end(sta_inf);
+
+ return 0;
+}
+EXPORT_SYMBOL(ieee80211_sta_ps_transition);
+
static ieee80211_rx_result debug_noinline
ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
{
@@ -1178,7 +1200,8 @@
* Change STA power saving mode only at the end of a frame
* exchange sequence.
*/
- if (!ieee80211_has_morefrags(hdr->frame_control) &&
+ if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) &&
+ !ieee80211_has_morefrags(hdr->frame_control) &&
!(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) &&
(rx->sdata->vif.type == NL80211_IFTYPE_AP ||
rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) {
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index c426504..5a11078 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -899,7 +899,8 @@
struct ieee80211_local *local = sdata->local;
int sent, buffered;
- drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
+ if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
+ drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
if (!skb_queue_empty(&sta->ps_tx_buf))
sta_info_clear_tim_bit(sta);
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index 38a7972..ffb0de9 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -98,6 +98,10 @@
* (b) always process RX events before TX status events if ordering
* can be unknown, for example with different interrupt status
* bits.
+ * (c) if PS mode transitions are manual (i.e. the flag
+ * %IEEE80211_HW_AP_LINK_PS is set), always process PS state
+ * changes before calling TX status events if ordering can be
+ * unknown.
*/
if (test_sta_flags(sta, WLAN_STA_PS_STA) &&
skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {