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mac80211: add a function for running rx without passing skbs to the stack

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This can be used to run mac80211 rx processing on a batch of frames in NAPI
poll before passing them to the network stack in a large batch.
This can improve icache footprint, or it can be used to pass frames via
netif_receive_skb_list.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20200726110611.46886-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Felix Fietkau 2020-07-26 13:06:11 +02:00 • committed by Johannes Berg
parent cb17ed29a7
commit c5d1686b31
3 changed files with 64 additions and 23 deletions
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25
include/net/mac80211.h
View file

@ -4360,6 +4360,31 @@ void ieee80211_free_hw(struct ieee80211_hw *hw);
*/
void ieee80211_restart_hw(struct ieee80211_hw *hw);
/**
* ieee80211_rx_list - receive frame and store processed skbs in a list
*
* Use this function to hand received frames to mac80211. The receive
* 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
* this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be
* mixed for a single hardware. Must not run concurrently with
* ieee80211_tx_status() or ieee80211_tx_status_ni().
*
* This function must be called with BHs disabled and RCU read lock
*
* @hw: the hardware this frame came in on
* @sta: the station the frame was received from, or %NULL
* @skb: the buffer to receive, owned by mac80211 after this call
* @list: the destination list
*/
void ieee80211_rx_list(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
struct sk_buff *skb, struct list_head *list);
/**
* ieee80211_rx_napi - receive frame from NAPI context
*