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sfc: Record hardware RX hash on each skb where possible

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Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings
2010-06-23 11:31:28 +00:00
committed by David S. Miller
parent 2822235278
commit 39c9cf0707
7 changed files with 49 additions and 3 deletions
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23
drivers/net/sfc/rx.c
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@@ -101,6 +101,19 @@ static inline unsigned int efx_rx_buf_size(struct efx_nic *efx)
return PAGE_SIZE << efx->rx_buffer_order;
}
static inline u32 efx_rx_buf_hash(struct efx_rx_buffer *buf)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) || NET_IP_ALIGN % 4 == 0
return __le32_to_cpup((const __le32 *)buf->data);
#else
const u8 *data = (const u8 *)buf->data;
return ((u32)data[0] |
(u32)data[1] << 8 |
(u32)data[2] << 16 |
(u32)data[3] << 24);
#endif
}
/**
* efx_init_rx_buffers_skb - create EFX_RX_BATCH skb-based RX buffers
*
@@ -441,6 +454,7 @@ static void efx_rx_packet_lro(struct efx_channel *channel,
/* Pass the skb/page into the LRO engine */
if (rx_buf->page) {
struct efx_nic *efx = channel->efx;
struct page *page = rx_buf->page;
struct sk_buff *skb;
@@ -453,6 +467,11 @@ static void efx_rx_packet_lro(struct efx_channel *channel,
return;
}
if (efx->net_dev->features & NETIF_F_RXHASH)
skb->rxhash = efx_rx_buf_hash(rx_buf);
rx_buf->data += efx->type->rx_buffer_hash_size;
rx_buf->len -= efx->type->rx_buffer_hash_size;
skb_shinfo(skb)->frags[0].page = page;
skb_shinfo(skb)->frags[0].page_offset =
efx_rx_buf_offset(rx_buf);
@@ -572,6 +591,10 @@ void __efx_rx_packet(struct efx_channel *channel,
skb_put(rx_buf->skb, rx_buf->len);
if (efx->net_dev->features & NETIF_F_RXHASH)
rx_buf->skb->rxhash = efx_rx_buf_hash(rx_buf);
skb_pull(rx_buf->skb, efx->type->rx_buffer_hash_size);
/* Move past the ethernet header. rx_buf->data still points
* at the ethernet header */
rx_buf->skb->protocol = eth_type_trans(rx_buf->skb,