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-rw-r--r--target/linux/cns3xxx/patches-3.3/400-ethernet_fix_tx_csum_offload.patch89
1 files changed, 89 insertions, 0 deletions
diff --git a/target/linux/cns3xxx/patches-3.3/400-ethernet_fix_tx_csum_offload.patch b/target/linux/cns3xxx/patches-3.3/400-ethernet_fix_tx_csum_offload.patch
new file mode 100644
index 000000000..e5dc838b9
--- /dev/null
+++ b/target/linux/cns3xxx/patches-3.3/400-ethernet_fix_tx_csum_offload.patch
@@ -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);