94d9c06907
Add support for QAM-256 in 2.4GHz 802.11n. This is non-standard and comunicate vht capabilities in 2.4GHz 802.11n permittin, for supported clients, to benefits for additional data rate. Many driver supports this, for a start enable this for ath10k and ath11k.
150 lines
4.6 KiB
Diff
150 lines
4.6 KiB
Diff
From 35040d1f349f2346832ca1ebb408924dbefc1cfc Mon Sep 17 00:00:00 2001
|
|
From: Christian Marangi <ansuelsmth@gmail.com>
|
|
Date: Wed, 14 Jun 2023 07:15:48 +0200
|
|
Subject: [PATCH 1/4] mac80211: introduce support for vendor QAM-256 in 2.4GHz
|
|
802.11n
|
|
|
|
Some vendor supports non-standard QAM-256 in 2.4GHz 802.11n mode.
|
|
The implementation works by comunicating vht capabilities to the client
|
|
in 2.4GHz 802.11n, the supported client will take this info and
|
|
benefits from the additional rates of it.
|
|
|
|
Each driver needs to enable support for this by enabling the
|
|
vendor_qam256_supported in the 2G sband struct and add the required
|
|
capabilities for vht_cap.
|
|
|
|
This feature is supported by various vendor with all kind of marketing
|
|
name, but all of them have in common the use of vht capabilities in
|
|
2.4GHz 802.11n.
|
|
|
|
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
|
|
---
|
|
include/net/cfg80211.h | 2 ++
|
|
net/mac80211/mlme.c | 14 ++++++++----
|
|
net/mac80211/util.c | 10 +++++---
|
|
net/mac80211/vht.c | 52 +++++++++++++++++++++++++++---------------
|
|
4 files changed, 51 insertions(+), 27 deletions(-)
|
|
|
|
--- a/include/net/cfg80211.h
|
|
+++ b/include/net/cfg80211.h
|
|
@@ -357,11 +357,13 @@ struct ieee80211_sta_ht_cap {
|
|
* to describe 802.11ac VHT capabilities for an STA.
|
|
*
|
|
* @vht_supported: is VHT supported by the STA
|
|
+ * @qam256_supported: is QAM256 supported by the STA
|
|
* @cap: VHT capabilities map as described in 802.11ac spec
|
|
* @vht_mcs: Supported VHT MCS rates
|
|
*/
|
|
struct ieee80211_sta_vht_cap {
|
|
bool vht_supported;
|
|
+ bool vendor_qam256_supported;
|
|
u32 cap; /* use IEEE80211_VHT_CAP_ */
|
|
struct ieee80211_vht_mcs_info vht_mcs;
|
|
};
|
|
--- a/net/mac80211/mlme.c
|
|
+++ b/net/mac80211/mlme.c
|
|
@@ -5270,6 +5270,8 @@ ieee80211_determine_our_sta_mode(struct
|
|
if (sband->band != NL80211_BAND_2GHZ) {
|
|
conn->mode = IEEE80211_CONN_MODE_VHT;
|
|
conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160;
|
|
+ } else if (sband->vht_cap.vendor_qam256_supported) {
|
|
+ conn->mode = IEEE80211_CONN_MODE_VHT;
|
|
}
|
|
|
|
if (is_5ghz &&
|
|
--- a/net/mac80211/util.c
|
|
+++ b/net/mac80211/util.c
|
|
@@ -1318,7 +1318,9 @@ static int ieee80211_put_preq_ies_band(s
|
|
break;
|
|
}
|
|
|
|
- if (sband->vht_cap.vht_supported && have_80mhz) {
|
|
+ if (sband->vht_cap.vht_supported &&
|
|
+ (have_80mhz ||
|
|
+ sband->vht_cap.vendor_qam256_supported)) {
|
|
u8 *pos;
|
|
|
|
if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
|
|
--- a/net/mac80211/vht.c
|
|
+++ b/net/mac80211/vht.c
|
|
@@ -122,7 +122,7 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(stru
|
|
struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
|
|
struct ieee80211_sta_vht_cap own_cap;
|
|
u32 cap_info, i;
|
|
- bool have_80mhz;
|
|
+ bool can_vht;
|
|
u32 mpdu_len;
|
|
|
|
memset(vht_cap, 0, sizeof(*vht_cap));
|
|
@@ -134,17 +134,21 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(stru
|
|
return;
|
|
|
|
/* Allow VHT if at least one channel on the sband supports 80 MHz */
|
|
- have_80mhz = false;
|
|
+ can_vht = false;
|
|
for (i = 0; i < sband->n_channels; i++) {
|
|
if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
|
|
IEEE80211_CHAN_NO_80MHZ))
|
|
continue;
|
|
|
|
- have_80mhz = true;
|
|
+ can_vht = true;
|
|
break;
|
|
}
|
|
|
|
- if (!have_80mhz)
|
|
+ /* Some Vendor supports non-standard QAM-256 on 2.4GHz 802.11n */
|
|
+ if (sband->vht_cap.vendor_qam256_supported)
|
|
+ can_vht = true;
|
|
+
|
|
+ if (!can_vht)
|
|
return;
|
|
|
|
/*
|
|
@@ -359,23 +363,23 @@ _ieee80211_sta_cap_rx_bw(struct link_sta
|
|
struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
|
|
struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
|
|
struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap;
|
|
+ enum nl80211_band band;
|
|
u32 cap_width;
|
|
|
|
+ if (chandef) {
|
|
+ band = chandef->chan->band;
|
|
+ } else {
|
|
+ struct ieee80211_bss_conf *link_conf;
|
|
+
|
|
+ rcu_read_lock();
|
|
+ link_conf = rcu_dereference(sdata->vif.link_conf[link_id]);
|
|
+ band = link_conf->chanreq.oper.chan->band;
|
|
+ rcu_read_unlock();
|
|
+ }
|
|
+
|
|
if (he_cap->has_he) {
|
|
- enum nl80211_band band;
|
|
u8 info;
|
|
|
|
- if (chandef) {
|
|
- band = chandef->chan->band;
|
|
- } else {
|
|
- struct ieee80211_bss_conf *link_conf;
|
|
-
|
|
- rcu_read_lock();
|
|
- link_conf = rcu_dereference(sdata->vif.link_conf[link_id]);
|
|
- band = link_conf->chanreq.oper.chan->band;
|
|
- rcu_read_unlock();
|
|
- }
|
|
-
|
|
if (eht_cap->has_eht && band == NL80211_BAND_6GHZ) {
|
|
info = eht_cap->eht_cap_elem.phy_cap_info[0];
|
|
|
|
@@ -401,7 +405,8 @@ _ieee80211_sta_cap_rx_bw(struct link_sta
|
|
return IEEE80211_STA_RX_BW_20;
|
|
}
|
|
|
|
- if (!vht_cap->vht_supported)
|
|
+ if (!vht_cap->vht_supported || (band == NL80211_BAND_2GHZ &&
|
|
+ vht_cap->vendor_qam256_supported))
|
|
return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
|
|
IEEE80211_STA_RX_BW_40 :
|
|
IEEE80211_STA_RX_BW_20;
|