2012-10-10 11:33:04 +00:00
|
|
|
/*
|
|
|
|
* VHT handling
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/ieee80211.h>
|
|
|
|
#include <linux/export.h>
|
|
|
|
#include <net/mac80211.h>
|
|
|
|
#include "ieee80211_i.h"
|
2012-12-27 17:55:36 +00:00
|
|
|
#include "rate.h"
|
2012-10-10 11:33:04 +00:00
|
|
|
|
|
|
|
|
2013-02-12 15:43:19 +00:00
|
|
|
void
|
|
|
|
ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
|
|
|
|
struct ieee80211_supported_band *sband,
|
|
|
|
const struct ieee80211_vht_cap *vht_cap_ie,
|
|
|
|
struct sta_info *sta)
|
2012-10-10 11:33:04 +00:00
|
|
|
{
|
2013-02-07 10:58:58 +00:00
|
|
|
struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
|
2012-10-10 11:33:04 +00:00
|
|
|
|
|
|
|
memset(vht_cap, 0, sizeof(*vht_cap));
|
|
|
|
|
2013-02-07 10:58:58 +00:00
|
|
|
if (!sta->sta.ht_cap.ht_supported)
|
|
|
|
return;
|
|
|
|
|
2012-10-10 11:33:04 +00:00
|
|
|
if (!vht_cap_ie || !sband->vht_cap.vht_supported)
|
|
|
|
return;
|
|
|
|
|
2013-02-07 10:47:44 +00:00
|
|
|
/* A VHT STA must support 40 MHz */
|
|
|
|
if (!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
|
|
|
|
return;
|
|
|
|
|
2012-10-10 11:33:04 +00:00
|
|
|
vht_cap->vht_supported = true;
|
|
|
|
|
|
|
|
vht_cap->cap = le32_to_cpu(vht_cap_ie->vht_cap_info);
|
|
|
|
|
|
|
|
/* Copy peer MCS info, the driver might need them. */
|
|
|
|
memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs,
|
|
|
|
sizeof(struct ieee80211_vht_mcs_info));
|
2013-02-07 10:47:44 +00:00
|
|
|
|
2012-12-27 17:55:36 +00:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2013-02-07 10:47:44 +00:00
|
|
|
sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
|
|
|
|
}
|
|
|
|
|
|
|
|
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;
|
2012-12-27 17:55:36 +00:00
|
|
|
enum ieee80211_sta_rx_bandwidth bw;
|
2013-02-07 10:47:44 +00:00
|
|
|
|
2012-12-27 17:55:36 +00:00
|
|
|
if (!sta->sta.vht_cap.vht_supported) {
|
|
|
|
bw = sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
|
2013-02-07 10:47:44 +00:00
|
|
|
IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
|
2012-12-27 17:55:36 +00:00
|
|
|
goto check_max;
|
|
|
|
}
|
2013-02-07 10:47:44 +00:00
|
|
|
|
|
|
|
switch (sdata->vif.bss_conf.chandef.width) {
|
|
|
|
default:
|
|
|
|
WARN_ON_ONCE(1);
|
|
|
|
/* fall through */
|
|
|
|
case NL80211_CHAN_WIDTH_20_NOHT:
|
|
|
|
case NL80211_CHAN_WIDTH_20:
|
|
|
|
case NL80211_CHAN_WIDTH_40:
|
2012-12-27 17:55:36 +00:00
|
|
|
bw = sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
|
2013-02-07 10:47:44 +00:00
|
|
|
IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
|
2012-12-27 17:55:36 +00:00
|
|
|
break;
|
2013-02-07 10:47:44 +00:00
|
|
|
case NL80211_CHAN_WIDTH_160:
|
2012-12-27 17:55:36 +00:00
|
|
|
if ((cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) ==
|
|
|
|
IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) {
|
|
|
|
bw = IEEE80211_STA_RX_BW_160;
|
|
|
|
break;
|
|
|
|
}
|
2013-02-07 10:47:44 +00:00
|
|
|
/* fall through */
|
|
|
|
case NL80211_CHAN_WIDTH_80P80:
|
2012-12-27 17:55:36 +00:00
|
|
|
if ((cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) ==
|
|
|
|
IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) {
|
|
|
|
bw = IEEE80211_STA_RX_BW_160;
|
|
|
|
break;
|
|
|
|
}
|
2013-02-07 10:47:44 +00:00
|
|
|
/* fall through */
|
|
|
|
case NL80211_CHAN_WIDTH_80:
|
2012-12-27 17:55:36 +00:00
|
|
|
bw = IEEE80211_STA_RX_BW_80;
|
2013-02-07 10:47:44 +00:00
|
|
|
}
|
2012-12-27 17:55:36 +00:00
|
|
|
|
|
|
|
check_max:
|
|
|
|
if (bw > sta->cur_max_bandwidth)
|
|
|
|
bw = sta->cur_max_bandwidth;
|
|
|
|
return bw;
|
2012-10-10 11:33:04 +00:00
|
|
|
}
|
2012-12-27 17:26:42 +00:00
|
|
|
|
|
|
|
void ieee80211_sta_set_rx_nss(struct sta_info *sta)
|
|
|
|
{
|
|
|
|
u8 ht_rx_nss = 0, vht_rx_nss = 0;
|
|
|
|
|
|
|
|
/* if we received a notification already don't overwrite it */
|
|
|
|
if (sta->sta.rx_nss)
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (sta->sta.ht_cap.ht_supported) {
|
|
|
|
if (sta->sta.ht_cap.mcs.rx_mask[0])
|
|
|
|
ht_rx_nss++;
|
|
|
|
if (sta->sta.ht_cap.mcs.rx_mask[1])
|
|
|
|
ht_rx_nss++;
|
|
|
|
if (sta->sta.ht_cap.mcs.rx_mask[2])
|
|
|
|
ht_rx_nss++;
|
|
|
|
if (sta->sta.ht_cap.mcs.rx_mask[3])
|
|
|
|
ht_rx_nss++;
|
|
|
|
/* FIXME: consider rx_highest? */
|
|
|
|
}
|
|
|
|
|
|
|
|
if (sta->sta.vht_cap.vht_supported) {
|
|
|
|
int i;
|
|
|
|
u16 rx_mcs_map;
|
|
|
|
|
|
|
|
rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map);
|
|
|
|
|
|
|
|
for (i = 7; i >= 0; i--) {
|
|
|
|
u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
|
|
|
|
|
|
|
|
if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
|
|
|
|
vht_rx_nss = i + 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* FIXME: consider rx_highest? */
|
|
|
|
}
|
|
|
|
|
|
|
|
ht_rx_nss = max(ht_rx_nss, vht_rx_nss);
|
|
|
|
sta->sta.rx_nss = max_t(u8, 1, ht_rx_nss);
|
|
|
|
}
|
2012-12-27 17:55:36 +00:00
|
|
|
|
|
|
|
void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
|
|
|
|
struct sta_info *sta, u8 opmode,
|
2013-02-07 21:24:55 +00:00
|
|
|
enum ieee80211_band band, bool nss_only)
|
2012-12-27 17:55:36 +00:00
|
|
|
{
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2013-02-07 21:24:55 +00:00
|
|
|
if (nss_only)
|
|
|
|
goto change;
|
|
|
|
|
2012-12-27 17:55:36 +00:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2013-02-07 21:24:55 +00:00
|
|
|
change:
|
2012-12-27 17:55:36 +00:00
|
|
|
if (changed)
|
|
|
|
rate_control_rate_update(local, sband, sta, changed);
|
|
|
|
}
|