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net: hns: Modify GMAC init TX threshold value 

This patch reduces GMAC TX threshold value to avoid gmac
hang-up with speed 100M/duplex half.

Signed-off-by: lipeng <lipeng321@huawei.com>
Signed-off-by: JinchuanTian <tianjinchuan1@huawei.com>
Reviewed-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
lipeng 2017-04-01 12:03:32 +01:00 committed by David S. Miller
parent ba2d079131
commit 87ff7e1f46
2 changed files with 10 additions and 0 deletions
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6
drivers/net/ethernet/hisilicon/hns/hns_dsaf_gmac.c
View File

@ -325,6 +325,12 @@ static void hns_gmac_init(void *mac_drv)
hns_gmac_tx_loop_pkt_dis(mac_drv);
if (drv->mac_cb->mac_type == HNAE_PORT_DEBUG)
hns_gmac_set_uc_match(mac_drv, 0);
/* reduce gmac tx water line to avoid gmac hang-up
* in speed 100M and duplex half.
*/
dsaf_set_dev_field(drv, GMAC_TX_WATER_LINE_REG, GMAC_TX_WATER_LINE_MASK,
GMAC_TX_WATER_LINE_SHIFT, 8);
}
void hns_gmac_update_stats(void *mac_drv)

4
drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
View File

@ -466,6 +466,7 @@
#define GMAC_DUPLEX_TYPE_REG 0x0008UL
#define GMAC_FD_FC_TYPE_REG 0x000CUL
#define GMAC_TX_WATER_LINE_REG 0x0010UL
#define GMAC_FC_TX_TIMER_REG 0x001CUL
#define GMAC_FD_FC_ADDR_LOW_REG 0x0020UL
#define GMAC_FD_FC_ADDR_HIGH_REG 0x0024UL
@ -912,6 +913,9 @@
#define GMAC_DUPLEX_TYPE_B 0
#define GMAC_TX_WATER_LINE_MASK ((1UL << 8) - 1)
#define GMAC_TX_WATER_LINE_SHIFT 0
#define GMAC_FC_TX_TIMER_S 0
#define GMAC_FC_TX_TIMER_M 0xffff