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authorFelix Fietkau <nbd@openwrt.org>2012-09-20 20:27:18 +0000
committerFelix Fietkau <nbd@openwrt.org>2012-09-20 20:27:18 +0000
commit029aaf4514816d6626e6e189f54441e7848e0fb2 (patch)
tree5a87ea1a0aafdd3fe9e58570cd99db637c86bc33 /target/linux/cns3xxx/patches-3.3
parentc4a419b44585a01e9fe9408d1f0493ed1a5dc0af (diff)
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cns3xxx: fix ethernet packet alignment issues (hw has an alignment requirement of 64), fix skb fragment chaining
SVN-Revision: 33498
Diffstat (limited to 'target/linux/cns3xxx/patches-3.3')
-rw-r--r--target/linux/cns3xxx/patches-3.3/410-ethernet_fix_jumbo_frame.patch32
1 files changed, 18 insertions, 14 deletions
diff --git a/target/linux/cns3xxx/patches-3.3/410-ethernet_fix_jumbo_frame.patch b/target/linux/cns3xxx/patches-3.3/410-ethernet_fix_jumbo_frame.patch
index 268770f..4fab226 100644
--- a/target/linux/cns3xxx/patches-3.3/410-ethernet_fix_jumbo_frame.patch
+++ b/target/linux/cns3xxx/patches-3.3/410-ethernet_fix_jumbo_frame.patch
@@ -1,6 +1,6 @@
--- a/drivers/net/ethernet/cavium/cns3xxx_eth.c
+++ b/drivers/net/ethernet/cavium/cns3xxx_eth.c
-@@ -26,15 +26,18 @@
+@@ -26,15 +26,21 @@
#define DRV_NAME "cns3xxx_eth"
@@ -16,15 +16,18 @@
-#define MAX_MRU (1536 + SKB_DMA_REALIGN)
-#define CNS3XXX_MAX_MTU (1536)
+
-+#define SKB_HEAD_ALIGN (((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES) + NET_SKB_PAD + NET_IP_ALIGN)
++#define RX_BUFFER_ALIGN 64
++#define RX_BUFFER_ALIGN_MASK (~(RX_BUFFER_ALIGN - 1))
++
++#define SKB_HEAD_ALIGN (((PAGE_SIZE - NET_SKB_PAD) % RX_BUFFER_ALIGN) + NET_SKB_PAD + NET_IP_ALIGN)
+#define RX_SEGMENT_ALLOC_SIZE 4096
+#define RX_SEGMENT_BUFSIZE (SKB_WITH_OVERHEAD(RX_SEGMENT_ALLOC_SIZE))
-+#define RX_SEGMENT_MRU ((RX_SEGMENT_BUFSIZE - SKB_HEAD_ALIGN))
++#define RX_SEGMENT_MRU (((RX_SEGMENT_BUFSIZE - SKB_HEAD_ALIGN) & RX_BUFFER_ALIGN_MASK) - NET_IP_ALIGN)
+#define MAX_MTU 9500
#define NAPI_WEIGHT 64
-@@ -266,7 +269,7 @@ struct _rx_ring {
+@@ -266,7 +272,7 @@ struct _rx_ring {
struct rx_desc *desc;
dma_addr_t phys_addr;
struct rx_desc *cur_addr;
@@ -33,7 +36,7 @@
unsigned int phys_tab[RX_DESCS];
u32 cur_index;
u32 alloc_index;
-@@ -280,6 +283,8 @@ struct sw {
+@@ -280,6 +286,8 @@ struct sw {
struct cns3xxx_plat_info *plat;
struct _tx_ring *tx_ring;
struct _rx_ring *rx_ring;
@@ -42,7 +45,7 @@
};
struct port {
-@@ -500,37 +505,35 @@ static void cns3xxx_alloc_rx_buf(struct
+@@ -500,37 +508,35 @@ static void cns3xxx_alloc_rx_buf(struct
struct _rx_ring *rx_ring = sw->rx_ring;
unsigned int i = rx_ring->alloc_index;
struct rx_desc *desc = &(rx_ring)->desc[i];
@@ -96,7 +99,7 @@
i++;
desc++;
}
-@@ -588,49 +591,78 @@ static int eth_poll(struct napi_struct *
+@@ -588,49 +594,79 @@ static int eth_poll(struct napi_struct *
while (desc->cown) {
struct sk_buff *skb;
@@ -139,7 +142,8 @@
+ else {
+ if (sw->frag_first == sw->frag_last)
+ skb_frag_add_head(sw->frag_first, skb);
-+ sw->frag_last->next = skb;
++ else
++ sw->frag_last->next = skb;
+ sw->frag_first->len += skb->len;
+ sw->frag_first->data_len += skb->len;
+ sw->frag_first->truesize += skb->truesize;
@@ -201,7 +205,7 @@
if (++i == RX_DESCS) {
i = 0;
desc = &(rx_ring)->desc[i];
-@@ -671,12 +703,6 @@ static int eth_xmit(struct sk_buff *skb,
+@@ -671,12 +707,6 @@ static int eth_xmit(struct sk_buff *skb,
if (pmap == 8)
pmap = (1 << 4);
@@ -214,7 +218,7 @@
spin_lock(&tx_lock);
if ((tx_ring->num_used + nr_frags) >= TX_DESCS) {
-@@ -701,8 +727,7 @@ static int eth_xmit(struct sk_buff *skb,
+@@ -701,8 +731,7 @@ static int eth_xmit(struct sk_buff *skb,
len = skb->len;
@@ -224,7 +228,7 @@
tx_desc->sdp = phys;
tx_desc->pmap = pmap;
-@@ -849,24 +874,24 @@ static int init_rings(struct sw *sw)
+@@ -849,24 +878,24 @@ static int init_rings(struct sw *sw)
/* Setup RX buffers */
for (i = 0; i < RX_DESCS; i++) {
struct rx_desc *desc = &(rx_ring)->desc[i];
@@ -260,7 +264,7 @@
rx_ring->phys_tab[i] = desc->sdp;
desc->cown = 0;
}
-@@ -905,12 +930,13 @@ static void destroy_rings(struct sw *sw)
+@@ -905,12 +934,13 @@ static void destroy_rings(struct sw *sw)
struct _rx_ring *rx_ring = sw->rx_ring;
struct rx_desc *desc = &(rx_ring)->desc[i];
struct sk_buff *skb = sw->rx_ring->buff_tab[i];
@@ -280,7 +284,7 @@
}
dma_pool_free(rx_dma_pool, sw->rx_ring->desc, sw->rx_ring->phys_addr);
dma_pool_destroy(rx_dma_pool);
-@@ -1085,13 +1111,22 @@ static int eth_set_mac(struct net_device
+@@ -1085,13 +1115,22 @@ static int eth_set_mac(struct net_device
return 0;
}
@@ -304,7 +308,7 @@
.ndo_set_mac_address = eth_set_mac,
.ndo_validate_addr = eth_validate_addr,
};
-@@ -1124,6 +1159,10 @@ static int __devinit eth_init_one(struct
+@@ -1124,6 +1163,10 @@ static int __devinit eth_init_one(struct
goto err_free;
}