From 9927b51469494d50956978b533d848748b792cef Mon Sep 17 00:00:00 2001 From: Dmitry Kravkov Date: Thu, 26 Jun 2014 14:31:05 +0300 Subject: [PATCH] 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 --- drivers/net/ethernet/broadcom/bnx2x/bnx2x.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) 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 * -- 2.20.1