mv643xx_eth: use sw csum for big packets
Some controllers (KW, Dove) limits the TX IP/layer4 checksum offloading to a max size. Signed-off-by: Saeed Bishara <saeed@marvell.com> Acked-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
08e554b17b
commit
9b2c2ff7a1
2 changed files with 12 additions and 2 deletions
|
@ -289,6 +289,7 @@ struct mv643xx_eth_shared_private {
|
|||
unsigned int t_clk;
|
||||
int extended_rx_coal_limit;
|
||||
int tx_bw_control;
|
||||
int tx_csum_limit;
|
||||
};
|
||||
|
||||
#define TX_BW_CONTROL_ABSENT 0
|
||||
|
@ -776,13 +777,16 @@ static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb)
|
|||
l4i_chk = 0;
|
||||
|
||||
if (skb->ip_summed == CHECKSUM_PARTIAL) {
|
||||
int hdr_len;
|
||||
int tag_bytes;
|
||||
|
||||
BUG_ON(skb->protocol != htons(ETH_P_IP) &&
|
||||
skb->protocol != htons(ETH_P_8021Q));
|
||||
|
||||
tag_bytes = (void *)ip_hdr(skb) - (void *)skb->data - ETH_HLEN;
|
||||
if (unlikely(tag_bytes & ~12)) {
|
||||
hdr_len = (void *)ip_hdr(skb) - (void *)skb->data;
|
||||
tag_bytes = hdr_len - ETH_HLEN;
|
||||
if (skb->len - hdr_len > mp->shared->tx_csum_limit ||
|
||||
unlikely(tag_bytes & ~12)) {
|
||||
if (skb_checksum_help(skb) == 0)
|
||||
goto no_csum;
|
||||
kfree_skb(skb);
|
||||
|
@ -2666,6 +2670,7 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
|
|||
* Detect hardware parameters.
|
||||
*/
|
||||
msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
|
||||
msp->tx_csum_limit = pd->tx_csum_limit ? pd->tx_csum_limit : 9 * 1024;
|
||||
infer_hw_params(msp);
|
||||
|
||||
platform_set_drvdata(pdev, msp);
|
||||
|
|
|
@ -19,6 +19,11 @@ struct mv643xx_eth_shared_platform_data {
|
|||
struct mbus_dram_target_info *dram;
|
||||
struct platform_device *shared_smi;
|
||||
unsigned int t_clk;
|
||||
/*
|
||||
* Max packet size for Tx IP/Layer 4 checksum, when set to 0, default
|
||||
* limit of 9KiB will be used.
|
||||
*/
|
||||
int tx_csum_limit;
|
||||
};
|
||||
|
||||
#define MV643XX_ETH_PHY_ADDR_DEFAULT 0
|
||||
|
|
Loading…
Reference in a new issue