diff options
| author | Emil Tantilov <emil.s.tantilov@intel.com> | 2017-12-11 19:36:54 +0100 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2018-01-26 16:46:50 +0100 |
| commit | 68b6ff5825c869c125930924f22e55c6ee126dbb (patch) | |
| tree | 2c0f096d53df31f7595df049050986dbcde911b8 /drivers/net/ethernet | |
| parent | ixgbevf: add function for checking if we can reuse page (diff) | |
| download | linux-68b6ff5825c869c125930924f22e55c6ee126dbb.tar.xz linux-68b6ff5825c869c125930924f22e55c6ee126dbb.zip | |
ixgbevf: only DMA sync frame length
Based on commit 64f2525ca4e7 ("igb: Only DMA sync frame length")
On some architectures synching a buffer for DMA may be expensive.
Instead of the entire 2K receive buffer only synchronize the length of
the frame, which will typically be the MTU or smaller.
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index 7ffd429d8e40..0cc2688671ec 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -803,12 +803,12 @@ static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer, **/ static bool ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring, struct ixgbevf_rx_buffer *rx_buffer, + u16 size, union ixgbe_adv_rx_desc *rx_desc, struct sk_buff *skb) { struct page *page = rx_buffer->page; unsigned char *va = page_address(page) + rx_buffer->page_offset; - unsigned int size = le16_to_cpu(rx_desc->wb.upper.length); #if (PAGE_SIZE < 8192) unsigned int truesize = IXGBEVF_RX_BUFSZ; #else @@ -856,6 +856,7 @@ static struct sk_buff *ixgbevf_fetch_rx_buffer(struct ixgbevf_ring *rx_ring, { struct ixgbevf_rx_buffer *rx_buffer; struct page *page; + u16 size = le16_to_cpu(rx_desc->wb.upper.length); rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean]; page = rx_buffer->page; @@ -890,11 +891,11 @@ static struct sk_buff *ixgbevf_fetch_rx_buffer(struct ixgbevf_ring *rx_ring, dma_sync_single_range_for_cpu(rx_ring->dev, rx_buffer->dma, rx_buffer->page_offset, - IXGBEVF_RX_BUFSZ, + size, DMA_FROM_DEVICE); /* pull page into skb */ - if (ixgbevf_add_rx_frag(rx_ring, rx_buffer, rx_desc, skb)) { + if (ixgbevf_add_rx_frag(rx_ring, rx_buffer, size, rx_desc, skb)) { /* hand second half of page back to the ring */ ixgbevf_reuse_rx_page(rx_ring, rx_buffer); } else { |