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cns3xxx: fix ethernet packet alignment issues (hw has an alignment requirement of 64), fix skb fragment chaining

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SVN-Revision: 33498
This commit is contained in:
Felix Fietkau 2012-09-20 20:27:18 +00:00
parent c4a419b445
commit 029aaf4514
1 changed files with 18 additions and 14 deletions
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32
target/linux/cns3xxx/patches-3.3/410-ethernet_fix_jumbo_frame.patch
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@ -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;
}