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Date: Tue, 27 Jun 2017 11:25:36 +0800 From: Yunsheng Lin <linyunsheng@...wei.com> To: Andrew Lunn <andrew@...n.ch> CC: <davem@...emloft.net>, <f.fainelli@...il.com>, <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>, <tremyfr@...il.com>, <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org> Subject: Re: [PATCH NET V5 2/2] net: hns: Use phy_driver to setup Phy loopback Hi, Andrew On 2017/6/26 21:42, Andrew Lunn wrote: > On Mon, Jun 26, 2017 at 10:10:39AM +0800, Lin Yun Sheng wrote: >> Use function set_loopback in phy_driver to setup phy loopback >> when doing ethtool self test. >> >> Signed-off-by: Lin Yun Sheng <linyunsheng@...wei.com> >> --- >> drivers/net/ethernet/hisilicon/hns/hnae.h | 1 + >> drivers/net/ethernet/hisilicon/hns/hns_ethtool.c | 92 +++++++----------------- >> 2 files changed, 26 insertions(+), 67 deletions(-) >> >> diff --git a/drivers/net/ethernet/hisilicon/hns/hnae.h b/drivers/net/ethernet/hisilicon/hns/hnae.h >> index 04211ac..7ba653a 100644 >> --- a/drivers/net/ethernet/hisilicon/hns/hnae.h >> +++ b/drivers/net/ethernet/hisilicon/hns/hnae.h >> @@ -360,6 +360,7 @@ enum hnae_loop { >> MAC_INTERNALLOOP_MAC = 0, >> MAC_INTERNALLOOP_SERDES, >> MAC_INTERNALLOOP_PHY, >> + MAC_LOOP_PHY_NONE, >> MAC_LOOP_NONE, >> }; >> >> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c >> index e95795b..10d82df 100644 >> --- a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c >> +++ b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c >> @@ -259,67 +259,24 @@ static int hns_nic_set_link_ksettings(struct net_device *net_dev, >> >> 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; >> - >> - if (phy_dev->is_c45) /* c45 branch adding for XGE PHY */ >> - return -ENOTSUPP; >> + int err; >> >> if (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, 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); >> - >> - /* 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; >> - phy_write(phy_dev, COPPER_CONTROL_REG, val); >> + err = phy_resume(phy_dev); > > Maybe this was discussed with an earlier version of these patches. Why > are using phy_resume() and phy_suspend()? When self_test is invoked with ETH_TEST_FL_OFFLINE option, hns mac driver call dev_close to set net dev to offline state if net dev is online. Doing the actual phy loolback test require phy is power up, So phy_resume and phy_suspend are used. > >> static int __lb_setup(struct net_device *ndev, >> @@ -332,10 +289,8 @@ static int __lb_setup(struct net_device *ndev, >> >> switch (loop) { >> case MAC_INTERNALLOOP_PHY: >> - if ((phy_dev) && (!phy_dev->is_c45)) { >> - ret = hns_nic_config_phy_loopback(phy_dev, 0x1); >> - ret |= h->dev->ops->set_loopback(h, loop, 0x1); >> - } >> + ret = hns_nic_config_phy_loopback(phy_dev, 0x1); >> + ret |= h->dev->ops->set_loopback(h, loop, 0x1); > > Or'ing together two errno values does not make much sense: > >> + if (loop == MAC_INTERNALLOOP_PHY) >> + ret = __lb_setup(ndev, MAC_LOOP_PHY_NONE); >> + else >> + ret = __lb_setup(ndev, MAC_LOOP_NONE); >> if (ret) >> netdev_err(ndev, "%s: __lb_setup return error(%d)!\n", >> __func__, > > And it looks like you even print the OR'ed version here! > Thanks for pointing out, will modify it next version. Best Regard Yunsheng Lin
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