From: lipeng <lipeng...@huawei.com>
This patch reduces GMAC TX threshold value to avoid gmac
hang-up with speed 100M/duplex half.
Signed-off-by: lipeng <lipeng...@huawei.com>
Signed-off-by: JinchuanTian <tianjinchu...@huawei.com>
Reviewed-by: Yisen Zhuang <yisen.zhu...@huawei.com>
Signed-off-by: Salil Mehta <salil.me...@huawei.com>
---
drivers/net/ethernet/hisilicon/hns/hns_dsaf_gmac.c | 6 ++++++
drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h | 4 ++++
2 files changed, 10 insertions(+)
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_gmac.c
b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_gmac.c
index 3382441..a8dbe00 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_gmac.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_gmac.c
@@ -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)
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
index 8fa18fc..4b8af68 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
@@ -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
--
2.7.4
