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Re: [PATCH 7/9] mac80211: add flags for STBC (Space-Time Block Coding)

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On Sun, 2010-04-18 at 16:56 +0200, Felix Fietkau wrote:
> Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
> ---
>  include/linux/ieee80211.h |    1 +
>  include/net/mac80211.h    |    3 +++
>  2 files changed, 4 insertions(+), 0 deletions(-)
> 
> diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
> index 1252ba1..97b2eae 100644
> --- a/include/linux/ieee80211.h
> +++ b/include/linux/ieee80211.h
> @@ -876,6 +876,7 @@ struct ieee80211_ht_cap {
>  #define IEEE80211_HT_CAP_SGI_40			0x0040
>  #define IEEE80211_HT_CAP_TX_STBC		0x0080
>  #define IEEE80211_HT_CAP_RX_STBC		0x0300
> +#define		IEEE80211_HT_CAP_RX_STBC_SHIFT	8
>  #define IEEE80211_HT_CAP_DELAY_BA		0x0400
>  #define IEEE80211_HT_CAP_MAX_AMSDU		0x0800
>  #define IEEE80211_HT_CAP_DSSSCCK40		0x1000
> diff --git a/include/net/mac80211.h b/include/net/mac80211.h
> index 75056dd..eadf794 100644
> --- a/include/net/mac80211.h
> +++ b/include/net/mac80211.h
> @@ -275,6 +275,8 @@ struct ieee80211_bss_conf {
>   *	MLME command (internal to mac80211 to figure out whether to send TX
>   *	status to user space)
>   * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame
> + * @IEEE80211_TX_CTL_STBC: tells the driver to use Space-Time Block Coding
> + *  (STBC) for this frame.
>   */
>  enum mac80211_tx_control_flags {
>  	IEEE80211_TX_CTL_REQ_TX_STATUS		= BIT(0),
> @@ -299,6 +301,7 @@ enum mac80211_tx_control_flags {
>  	IEEE80211_TX_INTFL_HAS_RADIOTAP		= BIT(20),
>  	IEEE80211_TX_INTFL_NL80211_FRAME_TX	= BIT(21),
>  	IEEE80211_TX_CTL_LDPC			= BIT(22),
> +	IEEE80211_TX_CTL_STBC			= BIT(23),

What if the # of streams is different? That doesn't look sufficient.

johannes

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