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[PATCH net-next v5 2/7] net: stmmac: Add dedicated XPCS cleanup method

Romain Gantois posted 7 patches 1 year, 7 months ago
There is a newer version of this series
[PATCH net-next v5 2/7] net: stmmac: Add dedicated XPCS cleanup method
Posted by Romain Gantois 1 year, 7 months ago 
From: Serge Semin <fancer.lancer@gmail.com>

Currently the XPCS handler destruction is performed in the
stmmac_mdio_unregister() method. It doesn't look good because the handler
isn't originally created in the corresponding protagonist
stmmac_mdio_unregister(), but in the stmmac_xpcs_setup() function. In
order to have more coherent MDIO and XPCS setup/cleanup procedures,
let's move the DW XPCS destruction to the dedicated stmmac_pcs_clean()
method.

This method will also be used to cleanup PCS hardware using the
pcs_exit() callback that will be introduced to stmmac in a subsequent
patch.

Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Co-developed-by: Romain Gantois <romain.gantois@bootlin.com>
Signed-off-by: Romain Gantois <romain.gantois@bootlin.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac.h      |  1 +
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |  6 +++++-
 drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c | 12 +++++++++---
 3 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index dddcaa9220cc3..7e0d727ed795b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -361,6 +361,7 @@ int stmmac_mdio_unregister(struct net_device *ndev);
 int stmmac_mdio_register(struct net_device *ndev);
 int stmmac_mdio_reset(struct mii_bus *mii);
 int stmmac_xpcs_setup(struct mii_bus *mii);
+void stmmac_pcs_clean(struct stmmac_priv *priv);
 void stmmac_set_ethtool_ops(struct net_device *netdev);
 
 int stmmac_init_tstamp_counter(struct stmmac_priv *priv, u32 systime_flags);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 59bf83904b62d..2a55c5d07f6b8 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7789,8 +7789,9 @@ int stmmac_dvr_probe(struct device *device,
 
 error_netdev_register:
 	phylink_destroy(priv->phylink);
-error_xpcs_setup:
 error_phy_setup:
+	stmmac_pcs_clean(priv);
+error_xpcs_setup:
 	if (priv->hw->pcs != STMMAC_PCS_TBI &&
 	    priv->hw->pcs != STMMAC_PCS_RTBI)
 		stmmac_mdio_unregister(ndev);
@@ -7832,6 +7833,9 @@ void stmmac_dvr_remove(struct device *dev)
 	if (priv->plat->stmmac_rst)
 		reset_control_assert(priv->plat->stmmac_rst);
 	reset_control_assert(priv->plat->stmmac_ahb_rst);
+
+	stmmac_pcs_clean(priv);
+
 	if (priv->hw->pcs != STMMAC_PCS_TBI &&
 	    priv->hw->pcs != STMMAC_PCS_RTBI)
 		stmmac_mdio_unregister(ndev);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index 0542cfd1817e6..508bd39cbe2b3 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -523,6 +523,15 @@ int stmmac_xpcs_setup(struct mii_bus *bus)
 	return 0;
 }
 
+void stmmac_pcs_clean(struct stmmac_priv *priv)
+{
+	if (!priv->hw->xpcs)
+		return;
+
+	xpcs_destroy(priv->hw->xpcs);
+	priv->hw->xpcs = NULL;
+}
+
 /**
  * stmmac_mdio_register
  * @ndev: net device structure
@@ -679,9 +688,6 @@ int stmmac_mdio_unregister(struct net_device *ndev)
 	if (!priv->mii)
 		return 0;
 
-	if (priv->hw->xpcs)
-		xpcs_destroy(priv->hw->xpcs);
-
 	mdiobus_unregister(priv->mii);
 	priv->mii->priv = NULL;
 	mdiobus_free(priv->mii);

-- 
2.44.0
Re: [PATCH net-next v5 2/7] net: stmmac: Add dedicated XPCS cleanup method
Posted by Serge Semin 1 year, 7 months ago 
Hi Romain

On Tue, Apr 30, 2024 at 09:29:42AM +0200, Romain Gantois wrote:
> From: Serge Semin <fancer.lancer@gmail.com>
> 
> Currently the XPCS handler destruction is performed in the
> stmmac_mdio_unregister() method. It doesn't look good because the handler
> isn't originally created in the corresponding protagonist
> stmmac_mdio_unregister(), but in the stmmac_xpcs_setup() function. In
> order to have more coherent MDIO and XPCS setup/cleanup procedures,
> let's move the DW XPCS destruction to the dedicated stmmac_pcs_clean()
> method.
> 
> This method will also be used to cleanup PCS hardware using the
> pcs_exit() callback that will be introduced to stmmac in a subsequent
> patch.
> 
> Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
> Co-developed-by: Romain Gantois <romain.gantois@bootlin.com>
> Signed-off-by: Romain Gantois <romain.gantois@bootlin.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/stmmac.h      |  1 +
>  drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |  6 +++++-
>  drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c | 12 +++++++++---
>  3 files changed, 15 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
> index dddcaa9220cc3..7e0d727ed795b 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
> @@ -361,6 +361,7 @@ int stmmac_mdio_unregister(struct net_device *ndev);
>  int stmmac_mdio_register(struct net_device *ndev);
>  int stmmac_mdio_reset(struct mii_bus *mii);
>  int stmmac_xpcs_setup(struct mii_bus *mii);
> +void stmmac_pcs_clean(struct stmmac_priv *priv);
>  void stmmac_set_ethtool_ops(struct net_device *netdev);
>  
>  int stmmac_init_tstamp_counter(struct stmmac_priv *priv, u32 systime_flags);
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index 59bf83904b62d..2a55c5d07f6b8 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -7789,8 +7789,9 @@ int stmmac_dvr_probe(struct device *device,
>  
>  error_netdev_register:
>  	phylink_destroy(priv->phylink);
> -error_xpcs_setup:
>  error_phy_setup:
> +	stmmac_pcs_clean(priv);
> +error_xpcs_setup:
>  	if (priv->hw->pcs != STMMAC_PCS_TBI &&
>  	    priv->hw->pcs != STMMAC_PCS_RTBI)
>  		stmmac_mdio_unregister(ndev);
> @@ -7832,6 +7833,9 @@ void stmmac_dvr_remove(struct device *dev)
>  	if (priv->plat->stmmac_rst)
>  		reset_control_assert(priv->plat->stmmac_rst);
>  	reset_control_assert(priv->plat->stmmac_ahb_rst);
> +
> +	stmmac_pcs_clean(priv);
> +
>  	if (priv->hw->pcs != STMMAC_PCS_TBI &&
>  	    priv->hw->pcs != STMMAC_PCS_RTBI)
>  		stmmac_mdio_unregister(ndev);
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
> index 0542cfd1817e6..508bd39cbe2b3 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
> @@ -523,6 +523,15 @@ int stmmac_xpcs_setup(struct mii_bus *bus)
>  	return 0;
>  }
>  

> +void stmmac_pcs_clean(struct stmmac_priv *priv)

Ideally it would have been great to have the entire driver fixed to
accept the stmmac_priv pointer as the functions argument. But this
would be too tiresome. Anyway seeing the PCS-setup protagonist method
has the net_device pointer passed I would implement the same prototype
for the antagonist even though it would require an additional local
variable. That will make the MDIO and PCS local interface-functions
looking alike and as if unified. That is the reason of why I made
stmmac_xpcs_clean() accepting the net_device pointer. 

Alternatively both stmmac_pcs_setup() and stmmac_pcs_clean() could be
converted to just accepting a pointer to the stmmac_priv instance.

-Serge(y)

> +{
> +	if (!priv->hw->xpcs)
> +		return;
> +
> +	xpcs_destroy(priv->hw->xpcs);
> +	priv->hw->xpcs = NULL;
> +}
> +
>  /**
>   * stmmac_mdio_register
>   * @ndev: net device structure
> @@ -679,9 +688,6 @@ int stmmac_mdio_unregister(struct net_device *ndev)
>  	if (!priv->mii)
>  		return 0;
>  
> -	if (priv->hw->xpcs)
> -		xpcs_destroy(priv->hw->xpcs);
> -
>  	mdiobus_unregister(priv->mii);
>  	priv->mii->priv = NULL;
>  	mdiobus_free(priv->mii);
> 
> -- 
> 2.44.0
>
Re: [PATCH net-next v5 2/7] net: stmmac: Add dedicated XPCS cleanup method
Posted by Romain Gantois 1 year, 7 months ago 
Hi Serge,

On Fri, 3 May 2024, Serge Semin wrote:

> 
> > +void stmmac_pcs_clean(struct stmmac_priv *priv)
> 
> Ideally it would have been great to have the entire driver fixed to
> accept the stmmac_priv pointer as the functions argument. But this
> would be too tiresome. Anyway seeing the PCS-setup protagonist method
> has the net_device pointer passed I would implement the same prototype
> for the antagonist even though it would require an additional local
> variable. That will make the MDIO and PCS local interface-functions
> looking alike and as if unified. That is the reason of why I made
> stmmac_xpcs_clean() accepting the net_device pointer. 
> 
> Alternatively both stmmac_pcs_setup() and stmmac_pcs_clean() could be
> converted to just accepting a pointer to the stmmac_priv instance.

I think that adapting stmmac_pcs_clean() to take a net_device struct would be 
more appropriate since it's the simpler of the two methods. I'll implement this 
in the next version.

Thanks,

-- 
Romain Gantois, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
Re: [PATCH net-next v5 2/7] net: stmmac: Add dedicated XPCS cleanup method
Posted by Serge Semin 1 year, 7 months ago 
On Mon, May 06, 2024 at 09:07:41AM +0200, Romain Gantois wrote:
> Hi Serge,
> 
> On Fri, 3 May 2024, Serge Semin wrote:
> 
> > 
> > > +void stmmac_pcs_clean(struct stmmac_priv *priv)
> > 
> > Ideally it would have been great to have the entire driver fixed to
> > accept the stmmac_priv pointer as the functions argument. But this
> > would be too tiresome. Anyway seeing the PCS-setup protagonist method
> > has the net_device pointer passed I would implement the same prototype
> > for the antagonist even though it would require an additional local
> > variable. That will make the MDIO and PCS local interface-functions
> > looking alike and as if unified. That is the reason of why I made
> > stmmac_xpcs_clean() accepting the net_device pointer. 
> > 
> > Alternatively both stmmac_pcs_setup() and stmmac_pcs_clean() could be
> > converted to just accepting a pointer to the stmmac_priv instance.
>
 
> I think that adapting stmmac_pcs_clean() to take a net_device struct would be 
> more appropriate since it's the simpler of the two methods. I'll implement this 
> in the next version.

Awesome! Thanks.

-Serge(y)

> 
> Thanks,
> 
> -- 
> Romain Gantois, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com

Patchew 2.1-devel-b67e4c2

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