Commit 4b2fe769 authored by Huazhong Tan's avatar Huazhong Tan Committed by Jakub Kicinski
Browse files

net: hns3: add support for RX completion checksum 



In some cases (for example ip fragment), hardware will
calculate the checksum of whole packet in RX, and setup
the HNS3_RXD_L2_CSUM_B flag in the descriptor, so add
support to utilize this checksum.

Signed-off-by: default avatarHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 9e39394f

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

+21 −0
Original line number Diff line number Diff line
@@ -2798,6 +2798,22 @@ static int hns3_gro_complete(struct sk_buff *skb, u32 l234info) 
	return 0;

}



static void hns3_checksum_complete(struct hns3_enet_ring *ring,

				   struct sk_buff *skb, u32 l234info)

{

	u32 lo, hi;



	u64_stats_update_begin(&ring->syncp);

	ring->stats.csum_complete++;

	u64_stats_update_end(&ring->syncp);

	skb->ip_summed = CHECKSUM_COMPLETE;

	lo = hnae3_get_field(l234info, HNS3_RXD_L2_CSUM_L_M,

			     HNS3_RXD_L2_CSUM_L_S);

	hi = hnae3_get_field(l234info, HNS3_RXD_L2_CSUM_H_M,

			     HNS3_RXD_L2_CSUM_H_S);

	skb->csum = csum_unfold((__force __sum16)(lo | hi << 8));

}



static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,

			     u32 l234info, u32 bd_base_info, u32 ol_info)

{
@@ -2812,6 +2828,11 @@ static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb, 
	if (!(netdev->features & NETIF_F_RXCSUM))

		return;



	if (l234info & BIT(HNS3_RXD_L2_CSUM_B)) {

		hns3_checksum_complete(ring, skb, l234info);

		return;

	}



	/* check if hardware has done checksum */

	if (!(bd_base_info & BIT(HNS3_RXD_L3L4P_B)))

		return;

drivers/net/ethernet/hisilicon/hns3/hns3_enet.h

+7 −0
Original line number Diff line number Diff line
@@ -82,6 +82,12 @@ enum hns3_nic_state { 
#define HNS3_RXD_STRP_TAGP_S			13

#define HNS3_RXD_STRP_TAGP_M			(0x3 << HNS3_RXD_STRP_TAGP_S)



#define HNS3_RXD_L2_CSUM_B			15

#define HNS3_RXD_L2_CSUM_L_S			4

#define HNS3_RXD_L2_CSUM_L_M			(0xff << HNS3_RXD_L2_CSUM_L_S)

#define HNS3_RXD_L2_CSUM_H_S			24

#define HNS3_RXD_L2_CSUM_H_M			(0xff << HNS3_RXD_L2_CSUM_H_S)



#define HNS3_RXD_L2E_B				16

#define HNS3_RXD_L3E_B				17

#define HNS3_RXD_L4E_B				18
@@ -371,6 +377,7 @@ struct ring_stats { 
			u64 err_bd_num;

			u64 l2_err;

			u64 l3l4_csum_err;

			u64 csum_complete;

			u64 rx_multicast;

			u64 non_reuse_pg;

		};

drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c

+1 −0
Original line number Diff line number Diff line
@@ -55,6 +55,7 @@ static const struct hns3_stats hns3_rxq_stats[] = { 
	HNS3_TQP_STAT("err_bd_num", err_bd_num),

	HNS3_TQP_STAT("l2_err", l2_err),

	HNS3_TQP_STAT("l3l4_csum_err", l3l4_csum_err),

	HNS3_TQP_STAT("csum_complete", csum_complete),

	HNS3_TQP_STAT("multicast", rx_multicast),

	HNS3_TQP_STAT("non_reuse_pg", non_reuse_pg),

};