[Intel-wired-lan] [PATCH 1/9] ixgbevf: use page_address offset from page
Singh, Krishneil K
krishneil.k.singh at intel.com
Mon Feb 26 15:55:14 UTC 2018
> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at osuosl.org] On Behalf Of
> Emil Tantilov
> Sent: Tuesday, January 30, 2018 4:51 PM
> To: intel-wired-lan at lists.osuosl.org
> Subject: [Intel-wired-lan] [PATCH 1/9] ixgbevf: use page_address offset from
> page
>
> Based on commit 3456fd53421e
> ("igb: Use page_address offset from page instead of masking virtual address")
>
> Update the handling of page addresses so that we always refer to them using
> a void pointer, and try to use the consistent name of va indicating we are
> working with a virtual address.
>
> Signed-off-by: Emil Tantilov <emil.s.tantilov at intel.com>
> ---
> drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 11 +++++------
> 1 file changed, 5 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
> b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
> index 9b3d43d..604b026 100644
> --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
> +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
> @@ -795,7 +795,7 @@ static bool ixgbevf_add_rx_frag(struct ixgbevf_ring
> *rx_ring,
> struct sk_buff *skb)
> {
> struct page *page = rx_buffer->page;
> - unsigned char *va = page_address(page) + rx_buffer->page_offset;
> + void *va = page_address(page) + rx_buffer->page_offset;
> #if (PAGE_SIZE < 8192)
> unsigned int truesize = IXGBEVF_RX_BUFSZ;
> #else
> @@ -831,7 +831,7 @@ static bool ixgbevf_add_rx_frag(struct ixgbevf_ring
> *rx_ring,
>
> add_tail_frag:
> skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
> - (unsigned long)va & ~PAGE_MASK, size, truesize);
> + va - page_address(page), size, truesize);
>
> return ixgbevf_can_reuse_rx_page(rx_buffer, page, truesize);
> }
> @@ -856,13 +856,12 @@ static struct sk_buff *ixgbevf_fetch_rx_buffer(struct
> ixgbevf_ring *rx_ring,
> DMA_FROM_DEVICE);
>
> if (likely(!skb)) {
> - void *page_addr = page_address(page) +
> - rx_buffer->page_offset;
> + void *va = page_address(page) + rx_buffer->page_offset;
>
> /* prefetch first cache line of first page */
> - prefetch(page_addr);
> + prefetch(va);
> #if L1_CACHE_BYTES < 128
> - prefetch(page_addr + L1_CACHE_BYTES);
> + prefetch(va + L1_CACHE_BYTES);
> #endif
>
> /* allocate a skb to store the frags */
>
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Tested-by: Krishneil Singh <krishneil.k.singh at intel.com>
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