Johannes Berg wrote:
Hi Reinette,
This work is motivated by an attempt to untangle the iwlwifi station
management to be able to use mac80211's sta notify callback. From 4965
and up the rate scaling in the device is done per station, so an entry
in the station table is required for the rate scaling initialization to
succeed.
Interesting. I've been thinking about making it go the other way --
remove rate scaling hooks completely. wl1271 apparently has rate scaling
completely in the firmware, so the RS algorithm on the host is just
overhead. I've been thinking putting 4965+ RS into the _driver_ makes
more sense since it really does a lot in the firmware and not on the
host.
Do you think we should try to go that route? I'd think it would probably
be a hardware flag ("no RS algo please") and then we'd skip all the
hooks and put things into the driver. The advantage is that we don't
care about the mac80211 API any more, things get cleaner and we can just
do all RS init from sta_notify().
Wouldn't that make it difficult to experiment with external rate scaling
algorithms? Not that minstrel or the other in-driver rate scaling
algorithms always get it right, but they are certainly more transparent
(and changeable) then firmware.
rtg
--
Tim Gardner tim.gardner@xxxxxxxxxxxxx
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