From: Johannes Berg <johannes.berg@xxxxxxxxx>
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@xxxxxxxxx>
---
include/linux/ieee80211.h | 1 +
include/net/mac80211.h | 3 ++
net/mac80211/ht.c | 4 ++
net/mac80211/ieee80211_i.h | 3 ++
net/mac80211/rx.c | 30 +++++++++++++++
net/mac80211/sta_info.h | 4 ++
net/mac80211/vht.c | 93 +++++++++++++++++++++++++++++++++++++++++-----
7 files changed, 128 insertions(+), 10 deletions(-)
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 602c99f..4aed928 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -1313,6 +1313,7 @@ struct ieee80211_vht_operation {
#define IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 0x00000002
#define IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ 0x00000004
#define IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ 0x00000008
+#define IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK 0x0000000C
#define IEEE80211_VHT_CAP_RXLDPC 0x00000010
#define IEEE80211_VHT_CAP_SHORT_GI_80 0x00000020
#define IEEE80211_VHT_CAP_SHORT_GI_160 0x00000040
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 972253a..a3a0bdf 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2107,11 +2107,14 @@ 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
*/
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/ht.c b/net/mac80211/ht.c
index a64b4f0..797969b 100644
--- a/net/mac80211/ht.c
+++ b/net/mac80211/ht.c
@@ -212,6 +212,10 @@ bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
changed = true;
sta->sta.bandwidth = bw;
+ sta->cur_max_bandwidth =
+ ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
+ IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
+
return changed;
}
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 741736d..5206b2d 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1422,6 +1422,9 @@ void ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta);
enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
void ieee80211_sta_set_rx_nss(struct sta_info *sta);
+void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
+ struct sta_info *sta, u8 opmode,
+ enum ieee80211_band band);
/* Spectrum management */
void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 8a861a5..1617e0b 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2436,6 +2436,36 @@ 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 is present */
+ if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+ goto invalid;
+
+ switch (mgmt->u.action.u.vht_opmode_notif.action_code) {
+ case WLAN_VHT_ACTION_OPMODE_NOTIF: {
+ u8 opmode;
+
+ /* verify opmode is present */
+ if (len < IEEE80211_MIN_ACTION_SIZE + 2)
+ goto invalid;
+
+ opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
+
+ ieee80211_vht_handle_opmode(rx->sdata, rx->sta,
+ opmode, status->band);
+ goto handled;
+ }
+ default:
+ break;
+ }
+ break;
case WLAN_CATEGORY_BACK:
if (sdata->vif.type != NL80211_IFTYPE_STATION &&
sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 03c42f8..63dfdb5 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -297,6 +297,8 @@ struct sta_ampdu_mlme {
* @sta_state: duplicates information about station state (for debug)
* @beacon_loss_count: number of times beacon loss has triggered
* @rcu_head: RCU head used for freeing this station struct
+ * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
+ * taken from HT/VHT capabilities or VHT operating mode notification
*/
struct sta_info {
/* General information, mostly static */
@@ -398,6 +400,8 @@ struct sta_info {
} debugfs;
#endif
+ enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
+
unsigned int lost_packets;
unsigned int beacon_loss_count;
diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c
index 67436e3..c9bfbd7 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 @@ void ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
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 @@ enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
{
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 @@ enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
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 @@ void ieee80211_sta_set_rx_nss(struct sta_info *sta)
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_VHT_OPMODE_RX_NSS_TYPE_BF)
+ return;
+
+ nss = opmode & IEEE80211_VHT_OPMODE_RX_NSS_MASK;
+ nss >>= IEEE80211_VHT_OPMODE_RX_NSS_SHIFT;
+ nss += 1;
+
+ if (sta->sta.rx_nss != nss) {
+ sta->sta.rx_nss = nss;
+ changed |= IEEE80211_RC_NSS_CHANGED;
+ }
+
+ switch (opmode & IEEE80211_VHT_OPMODE_CHANWIDTH_MASK) {
+ case IEEE80211_VHT_OPMODE_CHANWIDTH_20MHZ:
+ sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
+ break;
+ case IEEE80211_VHT_OPMODE_CHANWIDTH_40MHZ:
+ sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
+ break;
+ case IEEE80211_VHT_OPMODE_CHANWIDTH_80MHZ:
+ sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
+ break;
+ case IEEE80211_VHT_OPMODE_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);
+}
--
1.8.0
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