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mac80211: support paged rx SKBs

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Mac80211 drivers can now pass paged SKBs to mac80211 via
ieee80211_rx{_irqsafe}. The implementation currently use
skb_linearize() in a few places i.e. management frame
handling, software decryption, defragmentation and A-MSDU
process. We will optimize them one by one later.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Cc: Kalle Valo <kalle.valo@iki.fi>
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Zhu Yi 2010-03-29 17:35:07 +08:00 • committed by John W. Linville
parent e58b1253f1
commit e3cf8b3f7b
3 changed files with 54 additions and 11 deletions
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5
include/net/mac80211.h
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@ -1822,7 +1822,10 @@ void ieee80211_restart_hw(struct ieee80211_hw *hw);
* ieee80211_rx - receive frame
*
* Use this function to hand received frames to mac80211. The receive
* buffer in @skb must start with an IEEE 802.11 header.
* buffer in @skb must start with an IEEE 802.11 header. In case of a
* paged @skb is used, the driver is recommended to put the ieee80211
* header of the frame on the linear part of the @skb to avoid memory
* allocation and/or memcpy by the stack.
*
* This function may not be called in IRQ context. Calls to this function
* for a single hardware must be synchronized against each other. Calls to