mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-24 20:53:07 +02:00
ea9bbe955d
- on ar724x, rx buffers can be aligned with an offset of 2, which keeps the ip header aligned - alignment offset is only added if the ar8216 workaround is not active and the phy driver does not advertise its own packet alignment - ar71xx and ar91xx can not handle rx alignment offsets, however taking a hit on unaligned exceptions seems to have less overhead than re-aligning the data for large packets - use memmove to re-align small packets, if necessary tested on ar9132, ar7240 and ar7242 based devices without ar8216 headers git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20892 3c298f89-4303-0410-b956-a3cf2f4a3e73
45 lines
974 B
C
45 lines
974 B
C
/*
|
|
* Atheros AR71xx built-in ethernet mac driver
|
|
* Special support for the Atheros ar8216 switch chip
|
|
*
|
|
* Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
|
|
*
|
|
* Based on Atheros' AG7100 driver
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published
|
|
* by the Free Software Foundation.
|
|
*/
|
|
|
|
#include "ag71xx.h"
|
|
|
|
#define AR8216_PACKET_TYPE_MASK 0xf
|
|
#define AR8216_PACKET_TYPE_NORMAL 0
|
|
|
|
#define AR8216_HEADER_LEN 2
|
|
|
|
void ag71xx_add_ar8216_header(struct ag71xx *ag, struct sk_buff *skb)
|
|
{
|
|
skb_push(skb, AR8216_HEADER_LEN);
|
|
skb->data[0] = 0x10;
|
|
skb->data[1] = 0x80;
|
|
}
|
|
|
|
int ag71xx_remove_ar8216_header(struct ag71xx *ag, struct sk_buff *skb,
|
|
int pktlen)
|
|
{
|
|
u8 type;
|
|
|
|
type = skb->data[1] & AR8216_PACKET_TYPE_MASK;
|
|
switch (type) {
|
|
case AR8216_PACKET_TYPE_NORMAL:
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
skb_pull(skb, AR8216_HEADER_LEN);
|
|
return 0;
|
|
}
|