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net: hns: fix ethtool loopback fail bug 

When run ethtool cmd(ethtool -t ethx) again and again for a long
time, it will be probabilistically fail. The PHYs' registers may
be on different pages, so it must be switch to the right page
before setting PHYs' registers.
And __lb_up() calls phy_start() to startup the PHYs device, but
this function may change Copper Control Register(Page 0, Register 0)
to an other value. It would cause phy loopback test fail. if we
remove phy_start(), we have to remove the relative phy_stop(),
phy_disconnect() when doing phy loopback to keep the phy stay in
right status.

Reported-by: hejun <hjat2005@huawei.com>
Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kejian Yan 2016-06-21 11:56:28 +08:00 committed by David S. Miller
parent 89a6b1aae8
commit cba80bdea7
1 changed files with 14 additions and 21 deletions
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35
drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
View File

@ -242,6 +242,7 @@ static const char hns_nic_test_strs[][ETH_GSTRING_LEN] = {
static int hns_nic_config_phy_loopback(struct phy_device *phy_dev, u8 en)
{
#define COPPER_CONTROL_REG 0
#define PHY_POWER_DOWN BIT(11)
#define PHY_LOOP_BACK BIT(14)
u16 val = 0;
@ -252,33 +253,40 @@ static int hns_nic_config_phy_loopback(struct phy_device *phy_dev, u8 en)
/* speed : 1000M */
phy_write(phy_dev, HNS_PHY_PAGE_REG, 2);
phy_write(phy_dev, 21, 0x1046);
phy_write(phy_dev, HNS_PHY_PAGE_REG, 0);
/* Force Master */
phy_write(phy_dev, 9, 0x1F00);
/* Soft-reset */
phy_write(phy_dev, 0, 0x9140);
/* If autoneg disabled,two soft-reset operations */
phy_write(phy_dev, 0, 0x9140);
phy_write(phy_dev, 22, 0xFA);
phy_write(phy_dev, HNS_PHY_PAGE_REG, 0xFA);
/* Default is 0x0400 */
phy_write(phy_dev, 1, 0x418);
/* Force 1000M Link, Default is 0x0200 */
phy_write(phy_dev, 7, 0x20C);
phy_write(phy_dev, 22, 0);
phy_write(phy_dev, HNS_PHY_PAGE_REG, 0);
/* Enable MAC loop-back */
/* Enable PHY loop-back */
val = phy_read(phy_dev, COPPER_CONTROL_REG);
val |= PHY_LOOP_BACK;
val &= ~PHY_POWER_DOWN;
phy_write(phy_dev, COPPER_CONTROL_REG, val);
} else {
phy_write(phy_dev, 22, 0xFA);
phy_write(phy_dev, HNS_PHY_PAGE_REG, 0xFA);
phy_write(phy_dev, 1, 0x400);
phy_write(phy_dev, 7, 0x200);
phy_write(phy_dev, 22, 0);
phy_write(phy_dev, HNS_PHY_PAGE_REG, 0);
phy_write(phy_dev, 9, 0xF00);
val = phy_read(phy_dev, COPPER_CONTROL_REG);
val &= ~PHY_LOOP_BACK;
val |= PHY_POWER_DOWN;
phy_write(phy_dev, COPPER_CONTROL_REG, val);
}
return 0;
@ -339,28 +347,16 @@ static int __lb_up(struct net_device *ndev,
hns_nic_net_reset(ndev);
if (priv->phy) {
phy_disconnect(priv->phy);
msleep(100);
ret = hns_nic_init_phy(ndev, h);
if (ret)
return ret;
}
ret = __lb_setup(ndev, loop_mode);
if (ret)
return ret;
msleep(100);
msleep(200);
ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
if (ret)
return ret;
if (priv->phy)
phy_start(priv->phy);
/* link adjust duplex*/
if (priv->ae_handle->phy_if != PHY_INTERFACE_MODE_XGMII)
speed = 1000;
@ -561,9 +557,6 @@ static int __lb_down(struct net_device *ndev)
__func__,
ret);
if (priv->phy)
phy_stop(priv->phy);
if (h->dev->ops->stop)
h->dev->ops->stop(h);