On 2010-04-19 7:57 AM, Johannes Berg wrote:
> On Sun, 2010-04-18 at 18:05 +0200, Felix Fietkau wrote:
>
>> >> + * @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.
>
>> Hm, you're right. I initially thought the combination of the MCS index
>> and the STBC flag would be enough, but there are still some corner cases.
>
> Hm actually I guess that should be sufficient? What corner case are you
> thinking of?
Support for multi-rate retry and STBC with more than one stream on one
side, using rates from both MCS0-7 and MCS8-15 in the rate series.
Rx STBC for only one stream on the other side.
- Felix
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