nl80211: add Guard Interval support for set_bitrate_mask
Allow to force SGI, LGI.
Mainly for test purpose.
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index d10ba3a..d5e57bf 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1776,6 +1776,7 @@
u32 legacy;
u8 ht_mcs[IEEE80211_HT_MCS_MASK_LEN];
u16 vht_mcs[NL80211_VHT_NSS_MAX];
+ enum nl80211_txrate_gi gi;
} control[IEEE80211_NUM_BANDS];
};
/**
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 9a86c8b..53e56cf 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -3156,6 +3156,7 @@
* in an array of MCS numbers.
* @NL80211_TXRATE_VHT: VHT rates allowed for TX rate selection,
* see &struct nl80211_txrate_vht
+ * @NL80211_TXRATE_GI: configure GI, see &enum nl80211_txrate_gi
* @__NL80211_TXRATE_AFTER_LAST: internal
* @NL80211_TXRATE_MAX: highest TX rate attribute
*/
@@ -3164,6 +3165,7 @@
NL80211_TXRATE_LEGACY,
NL80211_TXRATE_HT,
NL80211_TXRATE_VHT,
+ NL80211_TXRATE_GI,
/* keep last */
__NL80211_TXRATE_AFTER_LAST,
@@ -3181,6 +3183,12 @@
__u16 mcs[NL80211_VHT_NSS_MAX];
};
+enum nl80211_txrate_gi {
+ NL80211_TXRATE_DEFAULT_GI,
+ NL80211_TXRATE_FORCE_SGI,
+ NL80211_TXRATE_FORCE_LGI,
+};
+
/**
* enum nl80211_band - Frequency band
* @NL80211_BAND_2GHZ: 2.4 GHz ISM band
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 09b6da8..a3515eb 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -7447,6 +7447,7 @@
[NL80211_TXRATE_HT] = { .type = NLA_BINARY,
.len = NL80211_MAX_SUPP_HT_RATES },
[NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
+ [NL80211_TXRATE_GI] = { .type = NLA_U8 },
};
static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
@@ -7527,6 +7528,12 @@
mask.control[band].vht_mcs))
return -EINVAL;
}
+ if (tb[NL80211_TXRATE_GI]) {
+ mask.control[band].gi =
+ nla_get_u8(tb[NL80211_TXRATE_GI]);
+ if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
+ return -EINVAL;
+ }
if (mask.control[band].legacy == 0) {
/* don't allow empty legacy rates if HT or VHT