linux-kernel - Re: [PATCH NET] net/hns:bugfix of ethtool -t phy self

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Date:   Tue, 20 Jun 2017 11:05:54 +0800
From:   l00371289 <linyunsheng@...wei.com>
To:     Florian Fainelli <f.fainelli@...il.com>, <davem@...emloft.net>
CC:     <huangdaode@...ilicon.com>, <xuwei5@...ilicon.com>,
        <liguozhu@...ilicon.com>, <Yisen.Zhuang@...wei.com>,
        <gabriele.paoloni@...wei.com>, <john.garry@...wei.com>,
        <linuxarm@...wei.com>, <salil.mehta@...wei.com>,
        <lipeng321@...wei.com>, <yankejian@...wei.com>,
        <tremyfr@...il.com>, <xieqianqian@...wei.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCH NET] net/hns:bugfix of ethtool -t phy self_test

hi, Florian

On 2017/6/20 5:00, Florian Fainelli wrote:
> On 06/16/2017 02:24 AM, Lin Yun Sheng wrote:
>> This patch fixes the phy loopback self_test failed issue. when
>> Marvell Phy Module is loaded, it will powerdown fiber when doing
>> phy loopback self test, which cause phy loopback self_test fail.
>>
>> Signed-off-by: Lin Yun Sheng <linyunsheng@...wei.com>
>> ---
>>  drivers/net/ethernet/hisilicon/hns/hns_ethtool.c | 16 ++++++++++++++--
>>  1 file changed, 14 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
>> index b8fab14..e95795b 100644
>> --- a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
>> +++ b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
>> @@ -288,9 +288,15 @@ static int hns_nic_config_phy_loopback(struct phy_device *phy_dev, u8 en)
> 
> The question really is, why is not this properly integrated into the PHY
> driver and PHYLIB such that the only thing the Ethernet MAC driver has
> to call is a function of the PHY driver putting it in self-test?
Do you meaning calling phy_dev->drv->resume and phy_dev->drv->suspend function?
I tried it, but it failed. if that is what you mean, I will look into it why it fail.

Thanks for your reply.

Best regards
YunSheng Lin
> 
>>  
>>  		/* Force 1000M Link, Default is 0x0200 */
>>  		phy_write(phy_dev, 7, 0x20C);
>> -		phy_write(phy_dev, HNS_PHY_PAGE_REG, 0);
>>  
>> -		/* Enable PHY loop-back */
>> +		/* Powerup Fiber */
>> +		phy_write(phy_dev, HNS_PHY_PAGE_REG, 1);
>> +		val = phy_read(phy_dev, COPPER_CONTROL_REG);
>> +		val &= ~PHY_POWER_DOWN;
>> +		phy_write(phy_dev, COPPER_CONTROL_REG, val);
>> +
>> +		/* Enable Phy Loopback */
>> +		phy_write(phy_dev, HNS_PHY_PAGE_REG, 0);
>>  		val = phy_read(phy_dev, COPPER_CONTROL_REG);
>>  		val |= PHY_LOOP_BACK;
>>  		val &= ~PHY_POWER_DOWN;
>> @@ -299,6 +305,12 @@ static int hns_nic_config_phy_loopback(struct phy_device *phy_dev, u8 en)
>>  		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, HNS_PHY_PAGE_REG, 1);
>> +		val = phy_read(phy_dev, COPPER_CONTROL_REG);
>> +		val |= PHY_POWER_DOWN;
>> +		phy_write(phy_dev, COPPER_CONTROL_REG, val);
>> +
>>  		phy_write(phy_dev, HNS_PHY_PAGE_REG, 0);
>>  		phy_write(phy_dev, 9, 0xF00);
>>  
>>
> 
>