From: Dmitry Kravkov Date: Thu, 26 Jun 2014 11:31:05 +0000 (+0300) Subject: bnx2x: enlarge minimal alignemnt of data offset X-Git-Tag: firefly_0821_release~176^2~3474^2~245^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9927b51469494d50956978b533d848748b792cef;p=firefly-linux-kernel-4.4.55.git bnx2x: enlarge minimal alignemnt of data offset This improves the performance of driver on machine with L1_CACHE_SHIFT of at most 32 bytes [HW was planned for 64-byte aligned fastpath data]. Signed-off-by: Dmitry Kravkov Signed-off-by: Yuval Mintz Signed-off-by: Ariel Elior Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h index faf262a0d6c4..ce8f86966c11 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h @@ -1508,8 +1508,10 @@ struct bnx2x { /* TCP with Timestamp Option (32) + IPv6 (40) */ #define ETH_MAX_TPA_HEADER_SIZE 72 - /* Max supported alignment is 256 (8 shift) */ -#define BNX2X_RX_ALIGN_SHIFT min(8, L1_CACHE_SHIFT) + /* Max supported alignment is 256 (8 shift) + * minimal alignment shift 6 is optimal for 57xxx HW performance + */ +#define BNX2X_RX_ALIGN_SHIFT max(6, min(8, L1_CACHE_SHIFT)) /* FW uses 2 Cache lines Alignment for start packet and size *