[Intel-wired-lan] [PATCH net-next v6 4/9] igc: Introduce igc_get_rx_frame_truesize() helper

[Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>]

On 10/02/2021 23:58, Vedang Patel wrote:
> From: Andre Guedes <andre.guedes@intel.com>
> 
> The RX frame truesize calculation is scattered throughout the RX code.
> This patch creates the helper function igc_get_rx_frame_truesize() and
> uses it where applicable.
> 
> Signed-off-by: Andre Guedes <andre.guedes@intel.com>
> Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
> Signed-off-by: Vedang Patel <vedang.patel@intel.com>
> ---
>   drivers/net/ethernet/intel/igc/igc_main.c | 29 ++++++++++++++---------
>   1 file changed, 18 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
> index 1157a24f6d26..d1fc5baadf9b 100644
> --- a/drivers/net/ethernet/intel/igc/igc_main.c
> +++ b/drivers/net/ethernet/intel/igc/igc_main.c
> @@ -1510,6 +1510,22 @@ static void igc_rx_buffer_flip(struct igc_rx_buffer *buffer,
>   #endif
>   }
>   
> +static unsigned int igc_get_rx_frame_truesize(struct igc_ring *ring,
> +					      unsigned int size)
> +{
> +	unsigned int truesize;
> +
> +#if (PAGE_SIZE < 8192)
> +	truesize = igc_rx_pg_size(ring) / 2;
> +#else
> +	truesize = ring_uses_build_skb(ring) ?
> +		   SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
> +		   SKB_DATA_ALIGN(IGC_SKB_PAD + size) :
> +		   SKB_DATA_ALIGN(size);
> +#endif
> +	return truesize;
> +}
> +
>   /**
>    * igc_add_rx_frag - Add contents of Rx buffer to sk_buff
>    * @rx_ring: rx descriptor ring to transact packets on
> @@ -1545,12 +1561,7 @@ static struct sk_buff *igc_build_skb(struct igc_ring *rx_ring,
>   				     unsigned int size)
>   {
>   	void *va = page_address(rx_buffer->page) + rx_buffer->page_offset;
> -#if (PAGE_SIZE < 8192)
> -	unsigned int truesize = igc_rx_pg_size(rx_ring) / 2;
> -#else
> -	unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
> -				SKB_DATA_ALIGN(IGC_SKB_PAD + size);
> -#endif
> +	unsigned int truesize = igc_get_rx_frame_truesize(rx_ring, size);
>   	struct sk_buff *skb;
>   
>   	/* prefetch first cache line of first page */
> @@ -1575,11 +1586,7 @@ static struct sk_buff *igc_construct_skb(struct igc_ring *rx_ring,
>   					 unsigned int size)
>   {
>   	void *va = page_address(rx_buffer->page) + rx_buffer->page_offset;
> -#if (PAGE_SIZE < 8192)
> -	unsigned int truesize = igc_rx_pg_size(rx_ring) / 2;
> -#else
> -	unsigned int truesize = SKB_DATA_ALIGN(size);
> -#endif
> +	unsigned int truesize = igc_get_rx_frame_truesize(rx_ring, size);
>   	unsigned int headlen;
>   	struct sk_buff *skb;
>   
> 
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>