diff options
| author | Ben Hutchings <bhutchings@solarflare.com> | 2013-01-30 03:33:15 +0400 |
|---|---|---|
| committer | Ben Hutchings <bhutchings@solarflare.com> | 2013-03-08 00:22:11 +0400 |
| commit | b74e3e8cd6f952faf8797fca81a5a2ceace6b9aa (patch) | |
| tree | 45d6011a5a5c9d31eb0f3667a80a10e698fabe40 /drivers/net/ethernet/sfc | |
| parent | 5036b7c7b9137bd084f28438396432348f20e0bc (diff) | |
| download | linux-b74e3e8cd6f952faf8797fca81a5a2ceace6b9aa.tar.xz | |
sfc: Update RX buffer address together with length
Adjust rx_buf->page_offset when we eat the RX hash prefix. Remove
efx_rx_buf_offset(), which is now redundant.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Diffstat (limited to 'drivers/net/ethernet/sfc')
| -rw-r--r-- | drivers/net/ethernet/sfc/net_driver.h | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/rx.c | 18 |
2 files changed, 8 insertions, 13 deletions
diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h index 3fd6dbe5e3dd..1bc911f980b5 100644 --- a/drivers/net/ethernet/sfc/net_driver.h +++ b/drivers/net/ethernet/sfc/net_driver.h @@ -208,7 +208,8 @@ struct efx_tx_queue { * @dma_addr: DMA base address of the buffer * @page: The associated page buffer. * Will be %NULL if the buffer slot is currently free. - * @page_offset: Offset within page + * @page_offset: If pending: offset in @page of DMA base address. + * If completed: offset in @page of Ethernet header. * @len: If pending: length for DMA descriptor. * If completed: received length, excluding hash prefix. * @flags: Flags for buffer and packet state. diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c index 8e78a2fe7364..04518722ac1d 100644 --- a/drivers/net/ethernet/sfc/rx.c +++ b/drivers/net/ethernet/sfc/rx.c @@ -47,13 +47,6 @@ static unsigned int rx_refill_threshold; */ #define EFX_RXD_HEAD_ROOM 2 -/* Offset of ethernet header within page */ -static inline unsigned int efx_rx_buf_offset(struct efx_nic *efx, - struct efx_rx_buffer *buf) -{ - return buf->page_offset + efx->type->rx_buffer_hash_size; -} - static inline u8 *efx_rx_buf_va(struct efx_rx_buffer *buf) { return page_address(buf->page) + buf->page_offset; @@ -356,8 +349,7 @@ static void efx_rx_packet_gro(struct efx_channel *channel, if (efx->net_dev->features & NETIF_F_RXHASH) skb->rxhash = efx_rx_buf_hash(eh); - skb_fill_page_desc(skb, 0, page, - efx_rx_buf_offset(efx, rx_buf), rx_buf->len); + skb_fill_page_desc(skb, 0, page, rx_buf->page_offset, rx_buf->len); skb->len = rx_buf->len; skb->data_len = rx_buf->len; @@ -399,7 +391,7 @@ static struct sk_buff *efx_rx_mk_skb(struct efx_channel *channel, if (rx_buf->len > hdr_len) { skb->data_len = skb->len - hdr_len; skb_fill_page_desc(skb, 0, rx_buf->page, - efx_rx_buf_offset(efx, rx_buf) + hdr_len, + rx_buf->page_offset + hdr_len, skb->data_len); } else { __free_pages(rx_buf->page, efx->rx_buffer_order); @@ -460,10 +452,12 @@ void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index, */ prefetch(efx_rx_buf_va(rx_buf)); + rx_buf->page_offset += efx->type->rx_buffer_hash_size; + rx_buf->len = len - efx->type->rx_buffer_hash_size; + /* Pipeline receives so that we give time for packet headers to be * prefetched into cache. */ - rx_buf->len = len - efx->type->rx_buffer_hash_size; out: efx_rx_flush_packet(channel); channel->rx_pkt = rx_buf; @@ -497,7 +491,7 @@ static void efx_rx_deliver(struct efx_channel *channel, u8 *eh, void __efx_rx_packet(struct efx_channel *channel, struct efx_rx_buffer *rx_buf) { struct efx_nic *efx = channel->efx; - u8 *eh = efx_rx_buf_va(rx_buf) + efx->type->rx_buffer_hash_size; + u8 *eh = efx_rx_buf_va(rx_buf); /* If we're in loopback test, then pass the packet directly to the * loopback layer, and free the rx_buf here |