linux/net
Johannes Berg 96f5e66e8a mac80211: fix aggregation for hardware with ampdu queues
Hardware with AMPDU queues currently has broken aggregation.

This patch fixes it by making all A-MPDUs go over the regular AC queues,
but keeping track of the hardware queues in mac80211. As a first rough
version, it actually stops the AC queue for extended periods of time,
which can be removed by adding buffering internal to mac80211, but is
currently not a huge problem because people rarely use multiple TIDs
that are in the same AC (and iwlwifi currently doesn't operate as AP).

This is a short-term fix, my current medium-term plan, which I hope to
execute soon as well, but am not sure can finish before .30, looks like
this:
 1) rework the internal queuing layer in mac80211 that we use for
    fragments if the driver stopped queue in the middle of a fragmented
    frame to be able to queue more frames at once (rather than just a
    single frame with its fragments)
 2) instead of stopping the entire AC queue, queue up the frames in a
    per-station/per-TID queue during aggregation session initiation,
    when the session has come up take all those frames and put them
    onto the queue from 1)
 3) push the ampdu queue layer abstraction this patch introduces in
    mac80211 into the driver, and remove the virtual queue stuff from
    mac80211 again

This plan will probably also affect ath9k in that mac80211 queues the
frames instead of passing them down, even when there are no ampdu queues.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-02-27 14:51:42 -05:00
..
9p 9p: fix endian issues [attempt 3] 2009-02-06 22:07:41 -08:00
802 snap: handle registration error and compile warning 2009-02-22 19:54:47 -08:00
8021q gro: Optimise Ethernet header comparison 2009-02-08 20:22:18 -08:00
appletalk net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
atm lec: convert to net_device_ops 2009-01-21 14:02:00 -08:00
ax25 ax25: more common return path joining 2009-02-06 23:47:14 -08:00
bluetooth bluetooth: driver API update 2009-01-07 17:23:17 -08:00
bridge netlink: change nlmsg_notify() return value logic 2009-02-24 23:18:28 -08:00
can ip: support for TX timestamps on UDP and RAW sockets 2009-02-15 22:43:38 -08:00
core netlink: change nlmsg_notify() return value logic 2009-02-24 23:18:28 -08:00
dcb DCB: fix kfree(skb) 2009-01-04 17:29:21 -08:00
dccp dccp: Debugging functions for feature negotiation 2009-01-21 14:34:05 -08:00
decnet netlink: change nlmsg_notify() return value logic 2009-02-24 23:18:28 -08:00
dsa net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
econet net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
ethernet eth: Declare an optimized compare_ether_addr_64bits() function 2008-11-23 23:24:32 -08:00
ipv4 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-02-25 00:02:05 -08:00
ipv6 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-02-25 00:02:05 -08:00
ipx net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
irda net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
iucv s390: remove s390_root_dev_*() 2009-01-06 10:44:34 -08:00
key af_key: initialize xfrm encap_oa 2009-01-25 20:49:14 -08:00
lapb
llc llc: fix non-const printk warning 2009-02-22 19:54:46 -08:00
mac80211 mac80211: fix aggregation for hardware with ampdu queues 2009-02-27 14:51:42 -05:00
netfilter Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-02-25 00:02:05 -08:00
netlabel netlabel: Update kernel configuration API 2008-12-31 12:54:11 -05:00
netlink netlink: change nlmsg_notify() return value logic 2009-02-24 23:18:28 -08:00
netrom netrom: convert to net_device_ops 2009-01-21 14:02:02 -08:00
packet net: packet socket packet_lookup_frame fix 2009-02-01 01:53:29 -08:00
phonet netlink: change nlmsg_notify() return value logic 2009-02-24 23:18:28 -08:00
rfkill net/rfkill/rfkill.c: fix unused rfkill_led_trigger() warning 2009-01-04 17:11:24 -08:00
rose rose: convert to network_device_ops 2009-01-21 14:02:04 -08:00
rxrpc RxRPC: Fix a potential NULL dereference 2009-02-06 21:50:52 -08:00
sched pkt_sched: sch_multiq: Change errno on non-multiqueue devices use. 2009-02-10 00:11:21 -08:00
sctp sctp: Inherit all socket options from parent correctly. 2009-02-16 00:03:11 -08:00
sunrpc net/sunrpc/xprtsock.c: some common code found 2009-02-06 23:48:33 -08:00
tipc net/tipc/bcast.h: use ARRAY_SIZE 2009-01-11 00:06:33 -08:00
unix introduce new LSM hooks where vfsmount is available. 2008-12-31 18:07:37 -05:00
wanrouter netdevice wanrouter: Convert directly reference of netdev->priv 2008-11-20 04:26:21 -08:00
wimax Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-02-14 23:12:00 -08:00
wireless cfg80211: add more flexible BSS lookup 2009-02-13 13:45:56 -05:00
x25 net: replace uses of __constant_{endian} 2009-02-01 00:45:17 -08:00
xfrm Revert "xfrm: For 32/64 compatability wrt. xfrm_usersa_info" 2009-01-20 09:49:51 -08:00
compat.c net: socket infrastructure for SO_TIMESTAMPING 2009-02-15 22:43:35 -08:00
Kconfig Phonet: move to Networking options like other protocol stacks 2009-01-26 21:03:33 -08:00
Makefile wimax: Makefile, Kconfig and docbook linkage for the stack 2009-01-07 10:00:17 -08:00
nonet.c
socket.c net: socket infrastructure for SO_TIMESTAMPING 2009-02-15 22:43:35 -08:00
sysctl_net.c missing bits of net-namespace / sysctl 2008-07-27 09:45:34 -07:00
TUNABLE