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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>
This commit is contained in:
Janusz Dziedzic 2014-01-08 08:46:02 +01:00 committed by Johannes Berg
parent 4b5800fec6
commit 0b9323f600
3 changed files with 16 additions and 0 deletions
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1
include/net/cfg80211.h
View File

@ -1776,6 +1776,7 @@ struct cfg80211_bitrate_mask {
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];
};
/**

8
include/uapi/linux/nl80211.h
View File

@ -3156,6 +3156,7 @@ enum nl80211_key_attributes {
* 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 @@ enum nl80211_tx_rate_attributes {
NL80211_TXRATE_LEGACY,
NL80211_TXRATE_HT,
NL80211_TXRATE_VHT,
NL80211_TXRATE_GI,
/* keep last */
__NL80211_TXRATE_AFTER_LAST,
@ -3181,6 +3183,12 @@ struct nl80211_txrate_vht {
__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

7
net/wireless/nl80211.c
View File

@ -7447,6 +7447,7 @@ static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
[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 @@ static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
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