1 files changed, 61 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 538d6b761887..494ac69ff477 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -597,8 +597,10 @@ enum ieee80211_conf_flags {
  * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed
  * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed
  * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed
+ * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed
  */
 enum ieee80211_conf_changed {
+        IEEE80211_CONF_CHANGE_SMPS              = BIT(1),
         IEEE80211_CONF_CHANGE_LISTEN_INTERVAL   = BIT(2),
         IEEE80211_CONF_CHANGE_MONITOR           = BIT(3),
         IEEE80211_CONF_CHANGE_PS                = BIT(4),
@@ -609,6 +611,21 @@ enum ieee80211_conf_changed {
 };
 
 /**
+ * enum ieee80211_smps_mode - spatial multiplexing power save mode
+ *
+ * @
+ */
+enum ieee80211_smps_mode {
+        IEEE80211_SMPS_AUTOMATIC,
+        IEEE80211_SMPS_OFF,
+        IEEE80211_SMPS_STATIC,
+        IEEE80211_SMPS_DYNAMIC,
+
+        /* keep last */
+        IEEE80211_SMPS_NUM_MODES,
+};
+
+/**
  * struct ieee80211_conf - configuration of the device
  *
  * This struct indicates how the driver shall configure the hardware.
@@ -636,6 +653,10 @@ enum ieee80211_conf_changed {
  * @short_frame_max_tx_count: Maximum number of transmissions for a "short"
  *    frame, called "dot11ShortRetryLimit" in 802.11, but actually means the
  *    number of transmissions not the number of retries
+ *
+ * @smps_mode: spatial multiplexing powersave mode; note that
+ *      %IEEE80211_SMPS_STATIC is used when the device is not
+ *      configured for an HT channel
  */
 struct ieee80211_conf {
         u32 flags;
@@ -648,6 +669,7 @@ struct ieee80211_conf {
 
         struct ieee80211_channel *channel;
         enum nl80211_channel_type channel_type;
+        enum ieee80211_smps_mode smps_mode;
 };
 
 /**
@@ -659,12 +681,14 @@ struct ieee80211_conf {
  * @type: type of this virtual interface
  * @bss_conf: BSS configuration for this interface, either our own
  *      or the BSS we're associated to
+ * @addr: address of this interface
  * @drv_priv: data area for driver use, will always be aligned to
  *      sizeof(void *).
  */
 struct ieee80211_vif {
         enum nl80211_iftype type;
         struct ieee80211_bss_conf bss_conf;
+        u8 addr[ETH_ALEN];
         /* must be last */
         u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
 };
@@ -928,6 +952,16 @@ enum ieee80211_tkip_key_type {
  * @IEEE80211_HW_BEACON_FILTER:
  *      Hardware supports dropping of irrelevant beacon frames to
  *      avoid waking up cpu.
+ *
+ * @IEEE80211_HW_SUPPORTS_STATIC_SMPS:
+ *      Hardware supports static spatial multiplexing powersave,
+ *      ie. can turn off all but one chain even on HT connections
+ *      that should be using more chains.
+ *
+ * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS:
+ *      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.
  */
 enum ieee80211_hw_flags {
         IEEE80211_HW_HAS_RATE_CONTROL                   = 1<<0,
@@ -945,6 +979,8 @@ enum ieee80211_hw_flags {
         IEEE80211_HW_SUPPORTS_DYNAMIC_PS                = 1<<12,
         IEEE80211_HW_MFP_CAPABLE                        = 1<<13,
         IEEE80211_HW_BEACON_FILTER                      = 1<<14,
+        IEEE80211_HW_SUPPORTS_STATIC_SMPS               = 1<<15,
+        IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS              = 1<<16,
 };
 
 /**
@@ -1213,6 +1249,31 @@ ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
  */
 
 /**
+ * DOC: Spatial multiplexing power save
+ *
+ * SMPS (Spatial multiplexing power save) is a mechanism to conserve
+ * power in an 802.11n implementation. For details on the mechanism
+ * and rationale, please refer to 802.11 (as amended by 802.11n-2009)
+ * "11.2.3 SM power save".
+ *
+ * The mac80211 implementation is capable of sending action frames
+ * to update the AP about the station's SMPS mode, and will instruct
+ * the driver to enter the specific mode. It will also announce the
+ * requested SMPS mode during the association handshake. Hardware
+ * support for this feature is required, and can be indicated by
+ * hardware flags.
+ *
+ * The default mode will be "automatic", which nl80211/cfg80211
+ * defines to be dynamic SMPS in (regular) powersave, and SMPS
+ * turned off otherwise.
+ *
+ * To support this feature, the driver must set the appropriate
+ * hardware support flags, and handle the SMPS flag to the config()
+ * operation. It will then with this mechanism be instructed to
+ * enter the requested SMPS mode while associated to an HT AP.
+ */
+
+/**
  * DOC: Frame filtering
  *
  * mac80211 requires to see many management frames for proper