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ar71xx: ag71xx: compute the RX buffer size from the maximum frame size

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Currently, the AG71XX_RX_PKT_SIZE value limits the received
frame size to 1514/1516 bytes with/without a VLAN header
respectively. However the hardware limit is controlled by
the value the AG71XX_REG_MAC_MFL register which contains
the value of the max_frame_len field.

Compute the RX buffer size from the max_frame_len field
to get rid of the 1514/1516 byte limitation. Also remove
the unused AG71XX_RX_PKT_SIZE definition.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 39121
This commit is contained in:
Gabor Juhos 2013-12-17 16:27:46 +00:00
parent b35e0da0f4
commit 31de995025
2 changed files with 1 additions and 3 deletions
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2
target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h
View file

@ -51,8 +51,6 @@
#define AG71XX_INT_INIT (AG71XX_INT_ERR | AG71XX_INT_POLL)
#define AG71XX_TX_MTU_LEN 1540
#define AG71XX_RX_PKT_SIZE \
(ETH_FRAME_LEN + ETH_FCS_LEN + VLAN_HLEN)
#define AG71XX_TX_RING_SIZE_DEFAULT 32
#define AG71XX_RX_RING_SIZE_DEFAULT 128

2
target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
View file

@ -609,7 +609,7 @@ static int ag71xx_open(struct net_device *dev)
struct ag71xx *ag = netdev_priv(dev);
int ret;
ag->rx_buf_size = AG71XX_RX_PKT_SIZE + NET_SKB_PAD + NET_IP_ALIGN;
ag->rx_buf_size = ag->max_frame_len + NET_SKB_PAD + NET_IP_ALIGN;
ret = ag71xx_rings_init(ag);
if (ret)