Commit 1051404b authored by Jijie Shao's avatar Jijie Shao Committed by Jakub Kicinski
Browse files

net: hibmcge: adjust the burst len configuration of the MAC controller to improve TX performance. 



Adjust the burst len configuration of the MAC controller
to improve TX performance.

Signed-off-by: default avatarJijie Shao <shaojijie@huawei.com>
Reviewed-by: default avatarSimon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250702125716.2875169-3-shaojijie@huawei.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 1d7cd7a9

drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c

+8 −0
Original line number Diff line number Diff line
@@ -168,6 +168,11 @@ static void hbg_hw_set_mac_max_frame_len(struct hbg_priv *priv, 


void hbg_hw_set_mtu(struct hbg_priv *priv, u16 mtu)

{

	/* burst_len BIT(29) set to 1 can improve the TX performance.

	 * But packet drop occurs when mtu > 2000.

	 * So, BIT(29) reset to 0 when mtu > 2000.

	 */

	u32 burst_len_bit = (mtu > 2000) ? 0 : 1;

	u32 frame_len;



	frame_len = mtu + VLAN_HLEN * priv->dev_specs.vlan_layers +
@@ -175,6 +180,9 @@ void hbg_hw_set_mtu(struct hbg_priv *priv, u16 mtu) 


	hbg_hw_set_pcu_max_frame_len(priv, frame_len);

	hbg_hw_set_mac_max_frame_len(priv, frame_len);



	hbg_reg_write_field(priv, HBG_REG_BRUST_LENGTH_ADDR,

			    HBG_REG_BRUST_LENGTH_B, burst_len_bit);

}



void hbg_hw_mac_enable(struct hbg_priv *priv, u32 enable)

drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h

+2 −0
Original line number Diff line number Diff line
@@ -185,6 +185,8 @@ 
#define HBG_REG_TX_CFF_ADDR_2_ADDR		(HBG_REG_SGMII_BASE + 0x0490)

#define HBG_REG_TX_CFF_ADDR_3_ADDR		(HBG_REG_SGMII_BASE + 0x0494)

#define HBG_REG_RX_CFF_ADDR_ADDR		(HBG_REG_SGMII_BASE + 0x04A0)

#define HBG_REG_BRUST_LENGTH_ADDR		(HBG_REG_SGMII_BASE + 0x04C4)

#define HBG_REG_BRUST_LENGTH_B			BIT(29)

#define HBG_REG_RX_BUF_SIZE_ADDR		(HBG_REG_SGMII_BASE + 0x04E4)

#define HBG_REG_RX_BUF_SIZE_M			GENMASK(15, 0)

#define HBG_REG_BUS_CTRL_ADDR			(HBG_REG_SGMII_BASE + 0x04E8)