Hoist 802.11 encapsulation up into net80211:

o call ieee80211_encap in ieee80211_start so frames passed down to drivers
  are already encapsulated
o remove ieee80211_encap calls in drivers
o fixup wi so it recreates the 802.3 head it requires from the 802.11
  header contents
o move fast-frame aggregation from ath to net80211 (conditional on
  IEEE80211_SUPPORT_SUPERG):
  - aggregation is now done in ieee80211_start; it is enabled when the
    packets/sec exceeds ieee80211_ffppsmin (net.wlan.ffppsmin) and frames
    are held on a staging queue according to ieee80211_ffagemax
    (net.wlan.ffagemax) to wait for a frame to combine with
  - drivers must call back to age/flush the staging queue (ath does this
    on tx done, at swba, and on rx according to the state of the tx queues
    and/or the contents of the staging queue)
  - remove fast-frame-related data structures from ath
  - add ieee80211_ff_node_init and ieee80211_ff_node_cleanup to handle
    per-node fast-frames state (we reuse 11n tx ampdu state)
o change ieee80211_encap calling convention to include an explicit vap
  so frames coming through a WDS vap are recognized w/o setting M_WDS

With these changes any device able to tx/rx 3Kbyte+ frames can use fast-frames.

Reviewed by:	thompsa, rpaulo, avatar, imp, sephe

1 files changed, 0 insertions, 6 deletions

diff --git a/sys/dev/iwn/if_iwn.c b/sys/dev/iwn/if_iwn.c
index a91a55b..2928c0f 100644
--- a/sys/dev/iwn/if_iwn.c
+++ b/sys/dev/iwn/if_iwn.c
@@ -2122,12 +2122,6 @@ iwn_start_locked(struct ifnet *ifp)
 		ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
 		pri = M_WME_GETAC(m);
 		txq = &sc->txq[pri];
-		m = ieee80211_encap(ni, m);
-		if (m == NULL) {
-			ifp->if_oerrors++;
-			ieee80211_free_node(ni);
-			continue;
-		}
 		if (txq->queued >= IWN_TX_RING_COUNT - 8) {
 			/* XXX not right */
 			/* ring is nearly full, stop flow */