On Sat, Mar 16, 2019 at 08:44:21PM +0100, Felix Fietkau wrote: > On 2019-03-04 10:48, Stanislaw Gruszka wrote: > > Program beacons data and PS buffered frames on TBTT work for USB. > > We do not have MT_TXQ_PSD queue available via USB endpoints. The way > > we can send PS broadcast frames in timely manner before PS stations go > > sleep again is program them in beacon data area. Hardware do not modify > > those frames since TXWI is properly configured. mt76x02_mac_set_beacon() > > already handle this and free no longer used frames. > > > > Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx> > I think it's a nice idea, but there is one problem with that approach: > beacon slots only have 1024 bytes for TXWI + data. > I think to support this properly, you probably need to adjust beacon > offsets for USB dynamically and limit the number of frames to what you > can fit in SRAM. That would be good since we could sent more buffered frames (ARP frames are small), but for now I would prefer simpler solution to enable AP support for USB: increase slot size to 1600 and make only 5 slots available. I assume we can not increase beacon SRAM area to more than 8kB. Stanislaw
