mac80211: add U-APSD client support
Add Unscheduled Automatic Power-Save Delivery (U-APSD) client support. The
idea is that the data frames from the client trigger AP to send the buffered
frames with ACs which have U-APSD enabled. This decreases latency and makes it
possible to save even more power.
Driver needs to use IEEE80211_HW_UAPSD to enable the feature. The current
implementation assumes that firmware takes care of the wakeup and
hardware needing IEEE80211_HW_PS_NULLFUNC_STACK is not yet supported.
Tested with wl1251 on a Nokia N900 and Cisco Aironet 1231G AP and running
various test traffic with ping.
Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 602c069..a8c6069 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -120,6 +120,24 @@
#define IEEE80211_QOS_CTL_TID_MASK 0x000F
#define IEEE80211_QOS_CTL_TAG1D_MASK 0x0007
+/* U-APSD queue for WMM IEs sent by AP */
+#define IEEE80211_WMM_IE_AP_QOSINFO_UAPSD (1<<7)
+
+/* U-APSD queues for WMM IEs sent by STA */
+#define IEEE80211_WMM_IE_STA_QOSINFO_AC_VO (1<<0)
+#define IEEE80211_WMM_IE_STA_QOSINFO_AC_VI (1<<1)
+#define IEEE80211_WMM_IE_STA_QOSINFO_AC_BK (1<<2)
+#define IEEE80211_WMM_IE_STA_QOSINFO_AC_BE (1<<3)
+#define IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK 0x0f
+
+/* U-APSD max SP length for WMM IEs sent by STA */
+#define IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL 0x00
+#define IEEE80211_WMM_IE_STA_QOSINFO_SP_2 0x01
+#define IEEE80211_WMM_IE_STA_QOSINFO_SP_4 0x02
+#define IEEE80211_WMM_IE_STA_QOSINFO_SP_6 0x03
+#define IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK 0x03
+#define IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT 5
+
struct ieee80211_hdr {
__le16 frame_control;
__le16 duration_id;
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index e1e73c6..f313a3c 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -113,6 +113,7 @@
u16 cw_min;
u16 cw_max;
u8 aifs;
+ bool uapsd;
};
/**
@@ -929,6 +930,11 @@
* Hardware supports dynamic spatial multiplexing powersave,
* ie. can turn off all but one chain and then wake the rest
* up as required after, for example, rts/cts handshake.
+ *
+ * @IEEE80211_HW_SUPPORTS_UAPSD:
+ * Hardware supports Unscheduled Automatic Power Save Delivery
+ * (U-APSD) in managed mode. The mode is configured with
+ * conf_tx() operation.
*/
enum ieee80211_hw_flags {
IEEE80211_HW_HAS_RATE_CONTROL = 1<<0,
@@ -948,6 +954,7 @@
IEEE80211_HW_BEACON_FILTER = 1<<14,
IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15,
IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16,
+ IEEE80211_HW_SUPPORTS_UAPSD = 1<<17,
};
/**