From 9f1661718c7fcf82e25c6aed20b729ee372d9d65 Mon Sep 17 00:00:00 2001 From: Ivo van Doorn Date: Sun, 26 Apr 2009 16:08:50 +0200 Subject: rt2x00: Add support for L2 padding during TX/RX Some hardware require L2 padding between header and payload because both must be aligned to a 4-byte boundary. This hardware also is easier during the RX path since we no longer need to move the entire payload but rather only the header to remove the padding (mac80211 only wants the payload to be 4-byte aligned). Signed-off-by: Ivo van Doorn Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2x00lib.h | 27 ++++++++++++++++++++++----- 1 file changed, 22 insertions(+), 5 deletions(-) (limited to 'drivers/net/wireless/rt2x00/rt2x00lib.h') diff --git a/drivers/net/wireless/rt2x00/rt2x00lib.h b/drivers/net/wireless/rt2x00/rt2x00lib.h index af3c47bd43bd..aa284e48d2c2 100644 --- a/drivers/net/wireless/rt2x00/rt2x00lib.h +++ b/drivers/net/wireless/rt2x00/rt2x00lib.h @@ -112,6 +112,23 @@ void rt2x00queue_unmap_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb); */ void rt2x00queue_free_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb); +/** + * rt2x00queue_payload_align - Align 802.11 payload to 4-byte boundary + * @skb: The skb to align + * @l2pad: Should L2 padding be used + * @header_length: Length of 802.11 header + * + * This function prepares the @skb to be send to the device or mac80211. + * If @l2pad is set to true padding will occur between the 802.11 header + * and payload. Otherwise the padding will be done in front of the 802.11 + * header. + * When @l2pad is set the function will check for the &SKBDESC_L2_PADDED + * flag in &skb_frame_desc. If that flag is set, the padding is removed + * and the flag cleared. Otherwise the padding is added and the flag is set. + */ +void rt2x00queue_payload_align(struct sk_buff *skb, + bool l2pad, unsigned int header_length); + /** * rt2x00queue_write_tx_frame - Write TX frame to hardware * @queue: Queue over which the frame should be send @@ -299,8 +316,8 @@ void rt2x00crypto_tx_copy_iv(struct sk_buff *skb, struct txentry_desc *txdesc); void rt2x00crypto_tx_remove_iv(struct sk_buff *skb, struct txentry_desc *txdesc); -void rt2x00crypto_tx_insert_iv(struct sk_buff *skb); -void rt2x00crypto_rx_insert_iv(struct sk_buff *skb, unsigned int align, +void rt2x00crypto_tx_insert_iv(struct sk_buff *skb, unsigned int header_length); +void rt2x00crypto_rx_insert_iv(struct sk_buff *skb, bool l2pad, unsigned int header_length, struct rxdone_entry_desc *rxdesc); #else @@ -330,12 +347,12 @@ static inline void rt2x00crypto_tx_remove_iv(struct sk_buff *skb, { } -static inline void rt2x00crypto_tx_insert_iv(struct sk_buff *skb) +static inline void rt2x00crypto_tx_insert_iv(struct sk_buff *skb, + unsigned int header_length) { } -static inline void rt2x00crypto_rx_insert_iv(struct sk_buff *skb, - unsigned int align, +static inline void rt2x00crypto_rx_insert_iv(struct sk_buff *skb, bool l2pad, unsigned int header_length, struct rxdone_entry_desc *rxdesc) { -- cgit v1.2.3