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[PATCH v2 0/3] net: ethtool: add ethtool_op_{get|set}_link_ksettings

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  [PATCH v2 0/3] net: ethtool: add ethtool_op_{get|set}_link_ksettings Philippe Reynes <tremyfr@gmail.com> - 2016-05-08 23:50 +0200
    [PATCH v2 3/3] net: ethernet: fec: use ethtool_op_{get|set}_link_ksettings Philippe Reynes <tremyfr@gmail.com> - 2016-05-08 23:50 +0200
    [PATCH v2 2/3] net: ethernet: fec: use phydev from struct net_device Philippe Reynes <tremyfr@gmail.com> - 2016-05-08 23:50 +0200
      Re: [PATCH v2 2/3] net: ethernet: fec: use phydev from struct  net_device Ben Hutchings <ben@decadent.org.uk> - 2016-05-09 00:30 +0200
        Re: [PATCH v2 2/3] net: ethernet: fec: use phydev from struct net_device Philippe Reynes <tremyfr@gmail.com> - 2016-05-09 00:50 +0200
          Re: [PATCH v2 2/3] net: ethernet: fec: use phydev from struct  net_device Ben Hutchings <ben@decadent.org.uk> - 2016-05-09 01:10 +0200
    RE: [PATCH v2 0/3] net: ethtool: add  ethtool_op_{get|set}_link_ksettings Fugang Duan <fugang.duan@nxp.com> - 2016-05-09 04:00 +0200

#1396497 — [PATCH v2 0/3] net: ethtool: add ethtool_op_{get|set}_link_ksettings

Ethtool callbacks {get|set}_link_ksettings may be the
same for many drivers. So we add two generics callbacks
ethtool_op_{get|set}_link_ksettings.

To use those generics callbacks, the ethernet driver must
use the pointer phydev contained in struct net_device, and
not use a private structure to store this pointer.

Changelog:
v2:
- use generic function instead of macro
- ethernet driver use the pointer phydev provided by struct net_device
  Those idea were provided by Ben Hutchings,
  and Florian Fainelli acknowledge them.

Philippe Reynes (3):
  net: core: ethtool: add ethtool_op_{get|set}_link_ksettings
  net: ethernet: fec: use phydev from struct net_device
  net: ethernet: fec: use ethtool_op_{get|set}_link_ksettings

 drivers/net/ethernet/freescale/fec.h      |    1 -
 drivers/net/ethernet/freescale/fec_main.c |   71 +++++++++--------------------
 include/linux/ethtool.h                   |    5 ++
 net/core/ethtool.c                        |   24 ++++++++++
 4 files changed, 50 insertions(+), 51 deletions(-)

-- 
1.7.4.4

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#1396498 — [PATCH v2 3/3] net: ethernet: fec: use ethtool_op_{get|set}_link_ksettings

There are two generics functions ethtool_op_{get|set}_link_ksettings,
so we can use them instead of defining the same code in the driver.

Signed-off-by: Philippe Reynes <tremyfr@gmail.com>
---
 drivers/net/ethernet/freescale/fec_main.c |   26 ++------------------------
 1 files changed, 2 insertions(+), 24 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index e1d24ff..f2dae6c 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -2055,28 +2055,6 @@ static void fec_enet_mii_remove(struct fec_enet_private *fep)
 	}
 }
 
-static int fec_enet_get_link_ksettings(struct net_device *ndev,
-				       struct ethtool_link_ksettings *cmd)
-{
-	struct phy_device *phydev = ndev->phydev;
-
-	if (!phydev)
-		return -ENODEV;
-
-	return phy_ethtool_ksettings_get(phydev, cmd);
-}
-
-static int fec_enet_set_link_ksettings(struct net_device *ndev,
-				       const struct ethtool_link_ksettings *cmd)
-{
-	struct phy_device *phydev = ndev->phydev;
-
-	if (!phydev)
-		return -ENODEV;
-
-	return phy_ethtool_ksettings_set(phydev, cmd);
-}
-
 static void fec_enet_get_drvinfo(struct net_device *ndev,
 				 struct ethtool_drvinfo *info)
 {
@@ -2575,8 +2553,8 @@ static const struct ethtool_ops fec_enet_ethtool_ops = {
 	.set_tunable		= fec_enet_set_tunable,
 	.get_wol		= fec_enet_get_wol,
 	.set_wol		= fec_enet_set_wol,
-	.get_link_ksettings	= fec_enet_get_link_ksettings,
-	.set_link_ksettings	= fec_enet_set_link_ksettings,
+	.get_link_ksettings	= ethtool_op_get_link_ksettings,
+	.set_link_ksettings	= ethtool_op_set_link_ksettings,
 };
 
 static int fec_enet_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
-- 
1.7.4.4

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#1396499 — [PATCH v2 2/3] net: ethernet: fec: use phydev from struct net_device

The private structure contain a pointer to phydev, but the structure
net_device already contain such pointer. So we can remove the pointer
phydev in the private structure, and update the driver to use the one
contained in struct net_device.

Signed-off-by: Philippe Reynes <tremyfr@gmail.com>
---
 drivers/net/ethernet/freescale/fec.h      |    1 -
 drivers/net/ethernet/freescale/fec_main.c |   49 ++++++++++++----------------
 2 files changed, 21 insertions(+), 29 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index 195122e..f58f9ea 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -517,7 +517,6 @@ struct fec_enet_private {
 
 	/* Phylib and MDIO interface */
 	struct	mii_bus *mii_bus;
-	struct	phy_device *phy_dev;
 	int	mii_timeout;
 	uint	phy_speed;
 	phy_interface_t	phy_interface;
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index bfa10c3..e1d24ff 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -967,10 +967,10 @@ fec_restart(struct net_device *ndev)
 			rcntl &= ~(1 << 8);
 
 		/* 1G, 100M or 10M */
-		if (fep->phy_dev) {
-			if (fep->phy_dev->speed == SPEED_1000)
+		if (ndev->phydev) {
+			if (ndev->phydev->speed == SPEED_1000)
 				ecntl |= (1 << 5);
-			else if (fep->phy_dev->speed == SPEED_100)
+			else if (ndev->phydev->speed == SPEED_100)
 				rcntl &= ~(1 << 9);
 			else
 				rcntl |= (1 << 9);
@@ -991,7 +991,7 @@ fec_restart(struct net_device *ndev)
 			 */
 			cfgr = (fep->phy_interface == PHY_INTERFACE_MODE_RMII)
 				? BM_MIIGSK_CFGR_RMII : BM_MIIGSK_CFGR_MII;
-			if (fep->phy_dev && fep->phy_dev->speed == SPEED_10)
+			if (ndev->phydev && ndev->phydev->speed == SPEED_10)
 				cfgr |= BM_MIIGSK_CFGR_FRCONT_10M;
 			writel(cfgr, fep->hwp + FEC_MIIGSK_CFGR);
 
@@ -1005,7 +1005,7 @@ fec_restart(struct net_device *ndev)
 	/* enable pause frame*/
 	if ((fep->pause_flag & FEC_PAUSE_FLAG_ENABLE) ||
 	    ((fep->pause_flag & FEC_PAUSE_FLAG_AUTONEG) &&
-	     fep->phy_dev && fep->phy_dev->pause)) {
+	     ndev->phydev && ndev->phydev->pause)) {
 		rcntl |= FEC_ENET_FCE;
 
 		/* set FIFO threshold parameter to reduce overrun */
@@ -1679,7 +1679,7 @@ static void fec_get_mac(struct net_device *ndev)
 static void fec_enet_adjust_link(struct net_device *ndev)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct phy_device *phy_dev = fep->phy_dev;
+	struct phy_device *phy_dev = ndev->phydev;
 	int status_change = 0;
 
 	/* Prevent a state halted on mii error */
@@ -1879,8 +1879,6 @@ static int fec_enet_mii_probe(struct net_device *ndev)
 	int phy_id;
 	int dev_id = fep->dev_id;
 
-	fep->phy_dev = NULL;
-
 	if (fep->phy_node) {
 		phy_dev = of_phy_connect(ndev, fep->phy_node,
 					 &fec_enet_adjust_link, 0,
@@ -1928,7 +1926,6 @@ static int fec_enet_mii_probe(struct net_device *ndev)
 
 	phy_dev->advertising = phy_dev->supported;
 
-	fep->phy_dev = phy_dev;
 	fep->link = 0;
 	fep->full_duplex = 0;
 
@@ -2061,8 +2058,7 @@ static void fec_enet_mii_remove(struct fec_enet_private *fep)
 static int fec_enet_get_link_ksettings(struct net_device *ndev,
 				       struct ethtool_link_ksettings *cmd)
 {
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct phy_device *phydev = fep->phy_dev;
+	struct phy_device *phydev = ndev->phydev;
 
 	if (!phydev)
 		return -ENODEV;
@@ -2073,8 +2069,7 @@ static int fec_enet_get_link_ksettings(struct net_device *ndev,
 static int fec_enet_set_link_ksettings(struct net_device *ndev,
 				       const struct ethtool_link_ksettings *cmd)
 {
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct phy_device *phydev = fep->phy_dev;
+	struct phy_device *phydev = ndev->phydev;
 
 	if (!phydev)
 		return -ENODEV;
@@ -2214,7 +2209,7 @@ static int fec_enet_set_pauseparam(struct net_device *ndev,
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
 
-	if (!fep->phy_dev)
+	if (!ndev->phydev)
 		return -ENODEV;
 
 	if (pause->tx_pause != pause->rx_pause) {
@@ -2230,17 +2225,17 @@ static int fec_enet_set_pauseparam(struct net_device *ndev,
 	fep->pause_flag |= pause->autoneg ? FEC_PAUSE_FLAG_AUTONEG : 0;
 
 	if (pause->rx_pause || pause->autoneg) {
-		fep->phy_dev->supported |= ADVERTISED_Pause;
-		fep->phy_dev->advertising |= ADVERTISED_Pause;
+		ndev->phydev->supported |= ADVERTISED_Pause;
+		ndev->phydev->advertising |= ADVERTISED_Pause;
 	} else {
-		fep->phy_dev->supported &= ~ADVERTISED_Pause;
-		fep->phy_dev->advertising &= ~ADVERTISED_Pause;
+		ndev->phydev->supported &= ~ADVERTISED_Pause;
+		ndev->phydev->advertising &= ~ADVERTISED_Pause;
 	}
 
 	if (pause->autoneg) {
 		if (netif_running(ndev))
 			fec_stop(ndev);
-		phy_start_aneg(fep->phy_dev);
+		phy_start_aneg(ndev->phydev);
 	}
 	if (netif_running(ndev)) {
 		napi_disable(&fep->napi);
@@ -2356,8 +2351,7 @@ static int fec_enet_get_sset_count(struct net_device *dev, int sset)
 
 static int fec_enet_nway_reset(struct net_device *dev)
 {
-	struct fec_enet_private *fep = netdev_priv(dev);
-	struct phy_device *phydev = fep->phy_dev;
+	struct phy_device *phydev = dev->phydev;
 
 	if (!phydev)
 		return -ENODEV;
@@ -2588,7 +2582,7 @@ static const struct ethtool_ops fec_enet_ethtool_ops = {
 static int fec_enet_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct phy_device *phydev = fep->phy_dev;
+	struct phy_device *phydev = ndev->phydev;
 
 	if (!netif_running(ndev))
 		return -EINVAL;
@@ -2843,7 +2837,7 @@ fec_enet_open(struct net_device *ndev)
 		goto err_enet_mii_probe;
 
 	napi_enable(&fep->napi);
-	phy_start(fep->phy_dev);
+	phy_start(ndev->phydev);
 	netif_tx_start_all_queues(ndev);
 
 	device_set_wakeup_enable(&ndev->dev, fep->wol_flag &
@@ -2867,7 +2861,7 @@ fec_enet_close(struct net_device *ndev)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
 
-	phy_stop(fep->phy_dev);
+	phy_stop(ndev->phydev);
 
 	if (netif_device_present(ndev)) {
 		napi_disable(&fep->napi);
@@ -2875,8 +2869,7 @@ fec_enet_close(struct net_device *ndev)
 		fec_stop(ndev);
 	}
 
-	phy_disconnect(fep->phy_dev);
-	fep->phy_dev = NULL;
+	phy_disconnect(ndev->phydev);
 
 	fec_enet_clk_enable(ndev, false);
 	pinctrl_pm_select_sleep_state(&fep->pdev->dev);
@@ -3504,7 +3497,7 @@ static int __maybe_unused fec_suspend(struct device *dev)
 	if (netif_running(ndev)) {
 		if (fep->wol_flag & FEC_WOL_FLAG_ENABLE)
 			fep->wol_flag |= FEC_WOL_FLAG_SLEEP_ON;
-		phy_stop(fep->phy_dev);
+		phy_stop(ndev->phydev);
 		napi_disable(&fep->napi);
 		netif_tx_lock_bh(ndev);
 		netif_device_detach(ndev);
@@ -3564,7 +3557,7 @@ static int __maybe_unused fec_resume(struct device *dev)
 		netif_device_attach(ndev);
 		netif_tx_unlock_bh(ndev);
 		napi_enable(&fep->napi);
-		phy_start(fep->phy_dev);
+		phy_start(ndev->phydev);
 	}
 	rtnl_unlock();
 
-- 
1.7.4.4

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#1396504 — Re: [PATCH v2 2/3] net: ethernet: fec: use phydev from struct net_device

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On Sun, 2016-05-08 at 23:44 +0200, Philippe Reynes wrote:
> The private structure contain a pointer to phydev, but the structure
> net_device already contain such pointer. So we can remove the pointer
> phydev in the private structure, and update the driver to use the one
> contained in struct net_device.

But there is no central code that updates the pointer, so:

[...]
> @@ -1928,7 +1926,6 @@ static int fec_enet_mii_probe(struct net_device *ndev)
>  
>  	phy_dev->advertising = phy_dev->supported;
>  
> -	fep->phy_dev = phy_dev;

you need to assign ndev->phydev here

[...]
> @@ -2875,8 +2869,7 @@ fec_enet_close(struct net_device *ndev)
>  		fec_stop(ndev);
>  	}
>  
> -	phy_disconnect(fep->phy_dev);
> -	fep->phy_dev = NULL;
> +	phy_disconnect(ndev->phydev);
[...]

and you need to set it to NULL here.

Ben.
 
-- 
Ben Hutchings
I haven't lost my mind; it's backed up on tape somewhere.

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#1396514 — Re: [PATCH v2 2/3] net: ethernet: fec: use phydev from struct net_device

On 09/05/16 00:22, Ben Hutchings wrote:
> On Sun, 2016-05-08 at 23:44 +0200, Philippe Reynes wrote:
>> The private structure contain a pointer to phydev, but the structure
>> net_device already contain such pointer. So we can remove the pointer
>> phydev in the private structure, and update the driver to use the one
>> contained in struct net_device.
>
> But there is no central code that updates the pointer, so:

The function phy_attach_direct and phy_detach update the pointer
phydev in the struct net_device.

>
> [...]
>> @@ -1928,7 +1926,6 @@ static int fec_enet_mii_probe(struct net_device *ndev)
>>
>>   	phy_dev->advertising = phy_dev->supported;
>>
>> -	fep->phy_dev = phy_dev;
>
> you need to assign ndev->phydev here

The function fec_enet_mii_probe call of_phy_connect,
which call phy_connect_direct, which call phy_attach_direct.
This last function update the pointer phydev of struct net_device.

> [...]
>> @@ -2875,8 +2869,7 @@ fec_enet_close(struct net_device *ndev)
>>   		fec_stop(ndev);
>>   	}
>>
>> -	phy_disconnect(fep->phy_dev);
>> -	fep->phy_dev = NULL;
>> +	phy_disconnect(ndev->phydev);
> [...]
>
> and you need to set it to NULL here.

The function fec_enet_close call phy_disconnect, which call phy_detach.
This last function set the pointer phydev in the struct net_device to NULL.


So from my understanding, those two lines aren't usefull.
May you confirm that I'm on the right way please ?

  
> Ben.
>

Philippe

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#1396516 — Re: [PATCH v2 2/3] net: ethernet: fec: use phydev from struct net_device

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On Mon, 2016-05-09 at 00:47 +0200, Philippe Reynes wrote:
> On 09/05/16 00:22, Ben Hutchings wrote:
> > 
> > On Sun, 2016-05-08 at 23:44 +0200, Philippe Reynes wrote:
> > > 
> > > The private structure contain a pointer to phydev, but the structure
> > > net_device already contain such pointer. So we can remove the pointer
> > > phydev in the private structure, and update the driver to use the one
> > > contained in struct net_device.
> > But there is no central code that updates the pointer, so:
> The function phy_attach_direct and phy_detach update the pointer
> phydev in the struct net_device.
[...]
> So from my understanding, those two lines aren't usefull.
> May you confirm that I'm on the right way please ?

Sorry, you're right.

Ben.

-- 
Ben Hutchings
I haven't lost my mind; it's backed up on tape somewhere.

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#1396538 — RE: [PATCH v2 0/3] net: ethtool: add ethtool_op_{get|set}_link_ksettings

Fom: Philippe Reynes <tremyfr@gmail.com> Sent: Monday, May 09, 2016 5:45 AM
> To: Fugang Duan <fugang.duan@nxp.com>; davem@davemloft.net;
> ben@decadent.org.uk; kan.liang@intel.com; decot@googlers.com;
> aduyck@mirantis.com; jiri@mellanox.com; jacob.e.keller@intel.com;
> tom@herbertland.com; andrew@lunn.ch
> Cc: netdev@vger.kernel.org; linux-kernel@vger.kernel.org; Philippe Reynes
> <tremyfr@gmail.com>
> Subject: [PATCH v2 0/3] net: ethtool: add ethtool_op_{get|set}_link_ksettings
> 
> Ethtool callbacks {get|set}_link_ksettings may be the same for many drivers. So
> we add two generics callbacks ethtool_op_{get|set}_link_ksettings.
> 
> To use those generics callbacks, the ethernet driver must use the pointer
> phydev contained in struct net_device, and not use a private structure to store
> this pointer.
> 
> Changelog:
> v2:
> - use generic function instead of macro
> - ethernet driver use the pointer phydev provided by struct net_device
>   Those idea were provided by Ben Hutchings,
>   and Florian Fainelli acknowledge them.
> 
> Philippe Reynes (3):
>   net: core: ethtool: add ethtool_op_{get|set}_link_ksettings
>   net: ethernet: fec: use phydev from struct net_device
>   net: ethernet: fec: use ethtool_op_{get|set}_link_ksettings
> 
>  drivers/net/ethernet/freescale/fec.h      |    1 -
>  drivers/net/ethernet/freescale/fec_main.c |   71 +++++++++--------------------
>  include/linux/ethtool.h                   |    5 ++
>  net/core/ethtool.c                        |   24 ++++++++++
>  4 files changed, 50 insertions(+), 51 deletions(-)
> 
> --
> 1.7.4.4

Acked-by: Fugang Duan <fugang.duan@nxp.com>

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