mac80211: handle VHT operating mode notification
Handle the operating mode notification action frame.
When the supported streams or the bandwidth change
let the driver and rate control algorithm know.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c
index 67436e3..0951f74 100644
--- a/net/mac80211/vht.c
+++ b/net/mac80211/vht.c
@@ -10,6 +10,7 @@
#include <linux/export.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
+#include "rate.h"
void ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
@@ -39,6 +40,15 @@
memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs,
sizeof(struct ieee80211_vht_mcs_info));
+ switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
+ case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
+ case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
+ sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
+ break;
+ default:
+ sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
+ }
+
sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
}
@@ -46,12 +56,13 @@
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
u32 cap = sta->sta.vht_cap.cap;
+ enum ieee80211_sta_rx_bandwidth bw;
- if (!sta->sta.vht_cap.vht_supported)
- return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
+ if (!sta->sta.vht_cap.vht_supported) {
+ bw = sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
-
- /* TODO: handle VHT opmode notification data */
+ goto check_max;
+ }
switch (sdata->vif.bss_conf.chandef.width) {
default:
@@ -60,19 +71,31 @@
case NL80211_CHAN_WIDTH_20_NOHT:
case NL80211_CHAN_WIDTH_20:
case NL80211_CHAN_WIDTH_40:
- return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
+ bw = sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
+ break;
case NL80211_CHAN_WIDTH_160:
- if (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
- return IEEE80211_STA_RX_BW_160;
+ if ((cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) ==
+ IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) {
+ bw = IEEE80211_STA_RX_BW_160;
+ break;
+ }
/* fall through */
case NL80211_CHAN_WIDTH_80P80:
- if (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
- return IEEE80211_STA_RX_BW_160;
+ if ((cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) ==
+ IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) {
+ bw = IEEE80211_STA_RX_BW_160;
+ break;
+ }
/* fall through */
case NL80211_CHAN_WIDTH_80:
- return IEEE80211_STA_RX_BW_80;
+ bw = IEEE80211_STA_RX_BW_80;
}
+
+ check_max:
+ if (bw > sta->cur_max_bandwidth)
+ bw = sta->cur_max_bandwidth;
+ return bw;
}
void ieee80211_sta_set_rx_nss(struct sta_info *sta)
@@ -115,3 +138,53 @@
ht_rx_nss = max(ht_rx_nss, vht_rx_nss);
sta->sta.rx_nss = max_t(u8, 1, ht_rx_nss);
}
+
+void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
+ struct sta_info *sta, u8 opmode,
+ enum ieee80211_band band)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_supported_band *sband;
+ enum ieee80211_sta_rx_bandwidth new_bw;
+ u32 changed = 0;
+ u8 nss;
+
+ sband = local->hw.wiphy->bands[band];
+
+ /* ignore - no support for BF yet */
+ if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
+ return;
+
+ nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
+ nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
+ nss += 1;
+
+ if (sta->sta.rx_nss != nss) {
+ sta->sta.rx_nss = nss;
+ changed |= IEEE80211_RC_NSS_CHANGED;
+ }
+
+ switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
+ case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
+ sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
+ break;
+ case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
+ sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
+ break;
+ case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
+ sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
+ break;
+ case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
+ sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
+ break;
+ }
+
+ new_bw = ieee80211_sta_cur_vht_bw(sta);
+ if (new_bw != sta->sta.bandwidth) {
+ sta->sta.bandwidth = new_bw;
+ changed |= IEEE80211_RC_NSS_CHANGED;
+ }
+
+ if (changed)
+ rate_control_rate_update(local, sband, sta, changed);
+}