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authorJouni Malinen <jouni.malinen@atheros.com>2009-05-19 17:01:38 +0300
committerJohn W. Linville <linville@tuxdriver.com>2009-05-20 14:46:32 -0400
commit9a23f9ca50943c1b4535d22b3acda3c31b4ad072 (patch)
treec8e4e3398279f6ac461e5ebfdb2d22d974e5f6c3
parentcce4c77b87ce7e71a0f244a3dfb6ac1c3a1bc67e (diff)
ath9k: Wake up for TX in mac80211 timeout=0 sleep mode
When using timeout=0 (PS-Poll) with mac80211, the driver will need to wake up for TX requests and remain awake until the TX has been completed (ACK received or timeout) or until the buffer frame(s) have been received (in case the TX is for a PS-Poll frame). Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/ath/ath9k/ath9k.h6
-rw-r--r--drivers/net/wireless/ath/ath9k/main.c30
-rw-r--r--drivers/net/wireless/ath/ath9k/recv.c16
-rw-r--r--drivers/net/wireless/ath/ath9k/xmit.c10
4 files changed, 58 insertions, 4 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index bd2363f075c..0d4ac43f6d9 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -516,6 +516,8 @@ struct ath_rfkill {
#define SC_OP_SCANNING BIT(14)
#define SC_OP_TSF_RESET BIT(15)
#define SC_OP_WAIT_FOR_CAB BIT(16)
+#define SC_OP_WAIT_FOR_PSPOLL_DATA BIT(17)
+#define SC_OP_WAIT_FOR_TX_ACK BIT(18)
struct ath_bus_ops {
void (*read_cachesize)(struct ath_softc *sc, int *csz);
@@ -678,7 +680,9 @@ static inline void ath9k_ps_restore(struct ath_softc *sc)
{
if (atomic_dec_and_test(&sc->ps_usecount))
if ((sc->hw->conf.flags & IEEE80211_CONF_PS) &&
- !(sc->sc_flags & SC_OP_WAIT_FOR_BEACON))
+ !(sc->sc_flags & (SC_OP_WAIT_FOR_BEACON |
+ SC_OP_WAIT_FOR_PSPOLL_DATA |
+ SC_OP_WAIT_FOR_TX_ACK)))
ath9k_hw_setpower(sc->sc_ah,
sc->sc_ah->restore_mode);
}
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index c161b75cded..7c3a98b1957 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -2070,6 +2070,31 @@ static int ath9k_tx(struct ieee80211_hw *hw,
goto exit;
}
+ if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
+ /*
+ * We are using PS-Poll and mac80211 can request TX while in
+ * power save mode. Need to wake up hardware for the TX to be
+ * completed and if needed, also for RX of buffered frames.
+ */
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+ ath9k_ps_wakeup(sc);
+ ath9k_hw_setrxabort(sc->sc_ah, 0);
+ if (ieee80211_is_pspoll(hdr->frame_control)) {
+ DPRINTF(sc, ATH_DBG_PS, "Sending PS-Poll to pick a "
+ "buffered frame\n");
+ sc->sc_flags |= SC_OP_WAIT_FOR_PSPOLL_DATA;
+ } else {
+ DPRINTF(sc, ATH_DBG_PS, "Wake up to complete TX\n");
+ sc->sc_flags |= SC_OP_WAIT_FOR_TX_ACK;
+ }
+ /*
+ * The actual restore operation will happen only after
+ * the sc_flags bit is cleared. We are just dropping
+ * the ps_usecount here.
+ */
+ ath9k_ps_restore(sc);
+ }
+
memset(&txctl, 0, sizeof(struct ath_tx_control));
/*
@@ -2307,7 +2332,10 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
if (!(ah->caps.hw_caps &
ATH9K_HW_CAP_AUTOSLEEP)) {
ath9k_hw_setrxabort(sc->sc_ah, 0);
- sc->sc_flags &= ~SC_OP_WAIT_FOR_BEACON;
+ sc->sc_flags &= ~(SC_OP_WAIT_FOR_BEACON |
+ SC_OP_WAIT_FOR_CAB |
+ SC_OP_WAIT_FOR_PSPOLL_DATA |
+ SC_OP_WAIT_FOR_TX_ACK);
if (sc->imask & ATH9K_INT_TIM_TIMER) {
sc->imask &= ~ATH9K_INT_TIM_TIMER;
ath9k_hw_set_interrupts(sc->sc_ah,
diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index 5567517aa64..5e046b58ad9 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -560,7 +560,8 @@ static void ath_rx_ps(struct ath_softc *sc, struct sk_buff *skb)
hdr = (struct ieee80211_hdr *)skb->data;
/* Process Beacon and CAB receive in PS state */
- if (ieee80211_is_beacon(hdr->frame_control))
+ if ((sc->sc_flags & SC_OP_WAIT_FOR_BEACON) &&
+ ieee80211_is_beacon(hdr->frame_control))
ath_rx_ps_beacon(sc, skb);
else if ((sc->sc_flags & SC_OP_WAIT_FOR_CAB) &&
(ieee80211_is_data(hdr->frame_control) ||
@@ -574,6 +575,16 @@ static void ath_rx_ps(struct ath_softc *sc, struct sk_buff *skb)
* point.
*/
ath_rx_ps_back_to_sleep(sc);
+ } else if ((sc->sc_flags & SC_OP_WAIT_FOR_PSPOLL_DATA) &&
+ !is_multicast_ether_addr(hdr->addr1) &&
+ !ieee80211_has_morefrags(hdr->frame_control)) {
+ sc->sc_flags &= ~SC_OP_WAIT_FOR_PSPOLL_DATA;
+ DPRINTF(sc, ATH_DBG_PS, "Going back to sleep after having "
+ "received PS-Poll data (0x%x)\n",
+ sc->sc_flags & (SC_OP_WAIT_FOR_BEACON |
+ SC_OP_WAIT_FOR_CAB |
+ SC_OP_WAIT_FOR_PSPOLL_DATA |
+ SC_OP_WAIT_FOR_TX_ACK));
}
}
@@ -798,7 +809,8 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush)
sc->rx.rxotherant = 0;
}
- if (unlikely(sc->sc_flags & SC_OP_WAIT_FOR_BEACON))
+ if (unlikely(sc->sc_flags & (SC_OP_WAIT_FOR_BEACON |
+ SC_OP_WAIT_FOR_PSPOLL_DATA)))
ath_rx_ps(sc, skb);
ath_rx_send_to_mac80211(sc, skb, &rx_status);
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 3f2bd79f945..a8def4fa449 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1790,6 +1790,16 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
skb_pull(skb, padsize);
}
+ if (sc->sc_flags & SC_OP_WAIT_FOR_TX_ACK) {
+ sc->sc_flags &= ~SC_OP_WAIT_FOR_TX_ACK;
+ DPRINTF(sc, ATH_DBG_PS, "Going back to sleep after having "
+ "received TX status (0x%x)\n",
+ sc->sc_flags & (SC_OP_WAIT_FOR_BEACON |
+ SC_OP_WAIT_FOR_CAB |
+ SC_OP_WAIT_FOR_PSPOLL_DATA |
+ SC_OP_WAIT_FOR_TX_ACK));
+ }
+
if (frame_type == ATH9K_NOT_INTERNAL)
ieee80211_tx_status(hw, skb);
else