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cns3xxx: fix ethernet tx checksum offload

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SVN-Revision: 33490
This commit is contained in:
Felix Fietkau 2012-09-19 23:50:15 +00:00
parent dd1fb8289f
commit eff9405752
1 changed files with 89 additions and 0 deletions
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89
target/linux/cns3xxx/patches-3.3/400-ethernet_fix_tx_csum_offload.patch Normal file
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@ -0,0 +1,89 @@
--- a/drivers/net/ethernet/cavium/cns3xxx_eth.c
+++ b/drivers/net/ethernet/cavium/cns3xxx_eth.c
@@ -666,6 +666,7 @@ static int eth_xmit(struct sk_buff *skb,
int nr_frags = skb_shinfo(skb)->nr_frags;
struct skb_frag_struct *frag;
unsigned int i;
+ u32 config0 = 0;
if (pmap == 8)
pmap = (1 << 4);
@@ -691,6 +692,10 @@ static int eth_xmit(struct sk_buff *skb,
spin_unlock(&tx_lock);
+ config0 = FORCE_ROUTE;
+ if (skb->ip_summed == CHECKSUM_PARTIAL)
+ config0 |= UDP_CHECKSUM | TCP_CHECKSUM;
+
if (!nr_frags) {
tx_desc = &(tx_ring)->desc[index];
@@ -704,23 +709,14 @@ static int eth_xmit(struct sk_buff *skb,
tx_ring->phys_tab[index] = phys;
tx_ring->buff_tab[index] = skb;
- if (index == TX_DESCS - 1) {
- tx_desc->config0 = END_OF_RING | FIRST_SEGMENT | LAST_SEGMENT |
- FORCE_ROUTE | IP_CHECKSUM | UDP_CHECKSUM |
- TCP_CHECKSUM | len;
- } else {
- tx_desc->config0 = FIRST_SEGMENT | LAST_SEGMENT |
- FORCE_ROUTE | IP_CHECKSUM | UDP_CHECKSUM |
- TCP_CHECKSUM | len;
- }
+ config0 |= FIRST_SEGMENT | LAST_SEGMENT;
} else {
- unsigned int config;
-
index = ((index + nr_frags) % TX_DESCS);
tx_desc = &(tx_ring)->desc[index];
/* fragments */
for (i = nr_frags; i > 0; i--) {
+ u32 config;
void *addr;
frag = &skb_shinfo(skb)->frags[i-1];
@@ -735,8 +731,7 @@ static int eth_xmit(struct sk_buff *skb,
tx_desc->pmap = pmap;
tx_ring->phys_tab[index] = phys;
- config = FORCE_ROUTE | IP_CHECKSUM | UDP_CHECKSUM |
- TCP_CHECKSUM | len;
+ config = config0 | len;
if (i == nr_frags) {
config |= LAST_SEGMENT;
tx_ring->buff_tab[index] = skb;
@@ -757,24 +752,19 @@ static int eth_xmit(struct sk_buff *skb,
/* header */
len = skb->len - skb->data_len;
- phys = dma_map_single(NULL, skb->data, len,
- DMA_TO_DEVICE);
+ phys = dma_map_single(NULL, skb->data, len, DMA_TO_DEVICE);
tx_desc->sdp = phys;
tx_desc->pmap = pmap;
tx_ring->phys_tab[index] = phys;
-
- if (index == TX_DESCS - 1) {
- tx_desc->config0 = END_OF_RING | FIRST_SEGMENT |
- FORCE_ROUTE | IP_CHECKSUM | UDP_CHECKSUM |
- TCP_CHECKSUM | len;
- } else {
- tx_desc->config0 = FIRST_SEGMENT |
- FORCE_ROUTE | IP_CHECKSUM | UDP_CHECKSUM |
- TCP_CHECKSUM | len;
- }
+ config0 |= FIRST_SEGMENT;
}
+ if (index == TX_DESCS - 1)
+ config0 |= END_OF_RING;
+
+ tx_desc->config0 = config0 | len;
+
mb();
spin_lock(&tx_lock);