From: Johannes Berg <johannes.berg@xxxxxxxxx>
Handle the operating mode notification action frame.
When the supported streams change, let the driver and
rate control algorithm know.
INCOMPLETE - need to handle bandwidth changes
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
include/net/mac80211.h | 3 +++
net/mac80211/rx.c | 42 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 45 insertions(+)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 5bc6459..66a8b0a 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2072,11 +2072,14 @@ enum ieee80211_frame_release_type {
* @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer
* changed (in IBSS mode) due to discovering more information about
* the peer.
+ * @IEEE80211_RC_NSS_CHANGED: N_SS (number of spatial streams) was changed
+ * by the peer, using an operating mode notification
*/
enum ieee80211_rate_control_changed {
IEEE80211_RC_BW_CHANGED = BIT(0),
IEEE80211_RC_SMPS_CHANGED = BIT(1),
IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2),
+ IEEE80211_RC_NSS_CHANGED = BIT(3),
};
/**
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 580704e..e863190 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2397,6 +2397,48 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
}
break;
+ case WLAN_CATEGORY_VHT:
+ if (sdata->vif.type != NL80211_IFTYPE_STATION &&
+ sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
+ sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+ sdata->vif.type != NL80211_IFTYPE_AP &&
+ sdata->vif.type != NL80211_IFTYPE_ADHOC)
+ break;
+
+ /* verify action code and one more byte (opmode) are present */
+ if (len < IEEE80211_MIN_ACTION_SIZE + 2)
+ goto invalid;
+
+ switch (mgmt->u.action.u.vht_opmode_notif.action_code) {
+ case WLAN_VHT_ACTION_OPMODE_NOTIF: {
+ struct ieee80211_supported_band *sband;
+ u8 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
+ u8 nss;
+
+ /* ignore - no support for BF yet */
+ if (opmode & IEEE80211_VHT_OPMODE_RX_NSS_TYPE_BF)
+ goto handled;
+
+ nss = opmode & IEEE80211_VHT_OPMODE_RX_NSS_MASK;
+ nss >>= IEEE80211_VHT_OPMODE_RX_NSS_SHIFT;
+
+ /* if no change do nothing */
+ if (rx->sta->sta.rx_nss == nss)
+ goto handled;
+ rx->sta->sta.rx_nss = nss;
+
+ /* TODO: handle bandwidth */
+
+ sband = rx->local->hw.wiphy->bands[status->band];
+
+ rate_control_rate_update(local, sband, rx->sta,
+ IEEE80211_RC_NSS_CHANGED);
+ goto handled;
+ }
+ default:
+ goto invalid;
+ }
+ break;
case WLAN_CATEGORY_BACK:
if (sdata->vif.type != NL80211_IFTYPE_STATION &&
sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
--
1.8.0
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