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mac80211: support VHT rates in TX info

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To achieve this, limit the number of retries to
31 (instead of 255) and use the three bits that
are then free for VHT flags.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2012-11-09 18:38:32 +01:00
parent 5614618ec4
commit 8bc83c2463
2 changed files with 57 additions and 20 deletions
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36
include/net/mac80211.h
View File

@ -499,9 +499,14 @@ enum mac80211_tx_control_flags {
* This is set if the current BSS requires ERP protection.
* @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble.
* @IEEE80211_TX_RC_MCS: HT rate.
* @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split
* into a higher 4 bits (Nss) and lower 4 bits (MCS number)
* @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in
* Greenfield mode.
* @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz.
* @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission
* @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission
* (80+80 isn't supported yet)
* @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the
* adjacent 20 MHz channels, if the current channel type is
* NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS.
@ -512,12 +517,15 @@ enum mac80211_rate_control_flags {
IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1),
IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2),
/* rate index is an MCS rate number instead of an index */
/* rate index is an HT/VHT MCS instead of an index */
IEEE80211_TX_RC_MCS = BIT(3),
IEEE80211_TX_RC_GREEN_FIELD = BIT(4),
IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5),
IEEE80211_TX_RC_DUP_DATA = BIT(6),
IEEE80211_TX_RC_SHORT_GI = BIT(7),
IEEE80211_TX_RC_VHT_MCS = BIT(8),
IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9),
IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10),
};
@ -560,10 +568,32 @@ enum mac80211_rate_control_flags {
*/
struct ieee80211_tx_rate {
s8 idx;
u8 count;
u8 flags;
u16 count:5,
flags:11;
} __packed;
#define IEEE80211_MAX_TX_RETRY 31
static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate,
u8 mcs, u8 nss)
{
WARN_ON(mcs & ~0xF);
WARN_ON(nss & ~0x7);
rate->idx = (nss << 4) | mcs;
}
static inline u8
ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate)
{
return rate->idx & 0xF;
}
static inline u8
ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate)
{
return rate->idx >> 4;
}
/**
* struct ieee80211_tx_info - skb transmit information
*

41
net/mac80211/cfg.c
View File

@ -370,31 +370,32 @@ static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
return 0;
}
static void rate_idx_to_bitrate(struct rate_info *rate, struct sta_info *sta, int idx)
{
enum ieee80211_band band = ieee80211_get_sdata_band(sta->sdata);
if (!(rate->flags & RATE_INFO_FLAGS_MCS) &&
!(rate->flags & RATE_INFO_FLAGS_VHT_MCS)) {
struct ieee80211_supported_band *sband;
sband = sta->local->hw.wiphy->bands[band];
rate->legacy = sband->bitrates[idx].bitrate;
} else
rate->mcs = idx;
}
void sta_set_rate_info_tx(struct sta_info *sta,
const struct ieee80211_tx_rate *rate,
struct rate_info *rinfo)
{
rinfo->flags = 0;
if (rate->flags & IEEE80211_TX_RC_MCS)
if (rate->flags & IEEE80211_TX_RC_MCS) {
rinfo->flags |= RATE_INFO_FLAGS_MCS;
rinfo->mcs = rate->idx;
} else if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
rinfo->flags |= RATE_INFO_FLAGS_VHT_MCS;
rinfo->mcs = ieee80211_rate_get_vht_mcs(rate);
rinfo->nss = ieee80211_rate_get_vht_nss(rate);
} else {
struct ieee80211_supported_band *sband;
sband = sta->local->hw.wiphy->bands[
ieee80211_get_sdata_band(sta->sdata)];
rinfo->legacy = sband->bitrates[rate->idx].bitrate;
}
if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
rinfo->flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
rinfo->flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
rinfo->flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
rate_idx_to_bitrate(rinfo, sta, rate->idx);
}
static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
@ -2003,10 +2004,16 @@ static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
return err;
}
if (changed & WIPHY_PARAM_RETRY_SHORT)
if (changed & WIPHY_PARAM_RETRY_SHORT) {
if (wiphy->retry_short > IEEE80211_MAX_TX_RETRY)
return -EINVAL;
local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
if (changed & WIPHY_PARAM_RETRY_LONG)
}
if (changed & WIPHY_PARAM_RETRY_LONG) {
if (wiphy->retry_long > IEEE80211_MAX_TX_RETRY)
return -EINVAL;
local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
}
if (changed &
(WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);