[net-next,12/18] ravb: Factorise {emac,dmac} init function

Message ID	20210722141351.13668-13-biju.das.jz@bp.renesas.com (mailing list archive)
State	Superseded
Delegated to:	Geert Uytterhoeven
Headers	show Return-Path: <linux-renesas-soc-owner@kernel.org> From: Biju Das <biju.das.jz@bp.renesas.com> To: "David S. Miller" <davem@davemloft.net>, Jakub Kicinski <kuba@kernel.org> Cc: Biju Das <biju.das.jz@bp.renesas.com>, Sergei Shtylyov <sergei.shtylyov@gmail.com>, Geert Uytterhoeven <geert+renesas@glider.be>, Sergey Shtylyov <s.shtylyov@omprussia.ru>, Adam Ford <aford173@gmail.com>, Andrew Lunn <andrew@lunn.ch>, Yuusuke Ashizuka <ashiduka@fujitsu.com>, Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>, netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Chris Paterson <Chris.Paterson2@renesas.com>, Biju Das <biju.das@bp.renesas.com>, Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com> Subject: [PATCH net-next 12/18] ravb: Factorise {emac,dmac} init function Date: Thu, 22 Jul 2021 15:13:45 +0100 Message-Id: <20210722141351.13668-13-biju.das.jz@bp.renesas.com> In-Reply-To: <20210722141351.13668-1-biju.das.jz@bp.renesas.com> References: <20210722141351.13668-1-biju.das.jz@bp.renesas.com> Precedence: bulk
Series	Add Gigabit Ethernet driver support \| expand [net-next,00/18] Add Gigabit Ethernet driver support [net-next,01/18] dt-bindings: net: renesas,etheravb: Document Gigabit Ethernet IP [net-next,02/18] drivers: clk: renesas: rzg2l-cpg: Add support to handle MUX clocks [net-next,03/18] drivers: clk: renesas: r9a07g044-cpg: Add ethernet clock sources [net-next,04/18] drivers: clk: renesas: r9a07g044-cpg: Add GbEthernet clock/reset [net-next,05/18] ravb: Replace chip type with a structure for driver data [net-next,06/18] ravb: Factorise ptp feature [net-next,07/18] ravb: Add features specific to R-Car Gen3 [net-next,08/18] ravb: Add R-Car common features [net-next,09/18] ravb: Factorise ravb_ring_free function [net-next,10/18] ravb: Factorise ravb_ring_format function [net-next,11/18] ravb: Factorise ravb_ring_init function [net-next,12/18] ravb: Factorise {emac,dmac} init function [net-next,13/18] ravb: Factorise ravb_rx function [net-next,14/18] ravb: Factorise ravb_adjust_link function [net-next,15/18] ravb: Factorise ravb_set_features [net-next,16/18] ravb: Add reset support [net-next,17/18] ravb: Add GbEthernet driver support [net-next,18/18] arm64: dts: renesas: r9a07g044: Add GbEther nodes

Message ID

20210722141351.13668-13-biju.das.jz@bp.renesas.com (mailing list archive)

State

Superseded

Delegated to:

Geert Uytterhoeven

Headers

From: Biju Das <biju.das.jz@bp.renesas.com>
To: "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>
Cc: Biju Das <biju.das.jz@bp.renesas.com>,
        Sergei Shtylyov <sergei.shtylyov@gmail.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Sergey Shtylyov <s.shtylyov@omprussia.ru>,
        Adam Ford <aford173@gmail.com>, Andrew Lunn <andrew@lunn.ch>,
        Yuusuke Ashizuka <ashiduka@fujitsu.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
        netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
        Chris Paterson <Chris.Paterson2@renesas.com>,
        Biju Das <biju.das@bp.renesas.com>,
        Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com>
Subject: [PATCH net-next 12/18] ravb: Factorise {emac,dmac} init function
Date: Thu, 22 Jul 2021 15:13:45 +0100
Message-Id: <20210722141351.13668-13-biju.das.jz@bp.renesas.com>
In-Reply-To: <20210722141351.13668-1-biju.das.jz@bp.renesas.com>
References: <20210722141351.13668-1-biju.das.jz@bp.renesas.com>
Precedence: bulk

Series

Add Gigabit Ethernet driver support | expand

Commit Message

Biju Das July 22, 2021, 2:13 p.m. UTC

The R-Car AVB module has Magic packet detection, multiple irq's and
timestamp enable features which is not present on RZ/G2L Gigabit
Ethernet module. Factorise emac and dmac initialization function to
support the later SoC.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/net/ethernet/renesas/ravb.h      |  2 +
 drivers/net/ethernet/renesas/ravb_main.c | 58 ++++++++++++++++--------
 2 files changed, 40 insertions(+), 20 deletions(-)

Comments

Sergei Shtylyov Aug. 2, 2021, 7:41 p.m. UTC | #1

Hello!

On 7/22/21 5:13 PM, Biju Das wrote:

> The R-Car AVB module has Magic packet detection, multiple irq's and
> timestamp enable features which is not present on RZ/G2L Gigabit
                                   ^ are

> Ethernet module. Factorise emac and dmac initialization function to
> support the later SoC.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
>  drivers/net/ethernet/renesas/ravb.h      |  2 +
>  drivers/net/ethernet/renesas/ravb_main.c | 58 ++++++++++++++++--------
>  2 files changed, 40 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
> index d82bfa6e57c1..4d5910dcda86 100644
> --- a/drivers/net/ethernet/renesas/ravb.h
> +++ b/drivers/net/ethernet/renesas/ravb.h
> @@ -992,6 +992,8 @@ struct ravb_ops {
>  	void (*ring_free)(struct net_device *ndev, int q);
>  	void (*ring_format)(struct net_device *ndev, int q);
>  	bool (*alloc_rx_desc)(struct net_device *ndev, int q);
> +	void (*emac_init)(struct net_device *ndev);
> +	void (*dmac_init)(struct net_device *ndev);
>  };
>  
>  struct ravb_drv_data {
> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index 3d0f6598b936..e200114376e4 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -454,7 +454,7 @@ static int ravb_ring_init(struct net_device *ndev, int q)
>  }
>  
>  /* E-MAC init function */
> -static void ravb_emac_init(struct net_device *ndev)
> +static void ravb_emac_init_ex(struct net_device *ndev)
>  {
>  	/* Receive frame limit set register */
>  	ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR);
> @@ -480,30 +480,19 @@ static void ravb_emac_init(struct net_device *ndev)
>  	ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP, ECSIPR);
>  }
>  
> -/* Device init function for Ethernet AVB */

   Grr, this comment seems oudated...

> -static int ravb_dmac_init(struct net_device *ndev)
> +static void ravb_emac_init(struct net_device *ndev)
>  {
>  	struct ravb_private *priv = netdev_priv(ndev);
>  	const struct ravb_drv_data *info = priv->info;
> -	int error;
>  
> -	/* Set CONFIG mode */
> -	error = ravb_config(ndev);
> -	if (error)
> -		return error;
> -
> -	error = ravb_ring_init(ndev, RAVB_BE);
> -	if (error)
> -		return error;
> -	error = ravb_ring_init(ndev, RAVB_NC);
> -	if (error) {
> -		ravb_ring_free(ndev, RAVB_BE);
> -		return error;
> -	}
> +	info->ravb_ops->emac_init(ndev);
> +}

   The whole ravb_emac_init() now consists only of a single method call?
Why do we need it at all?

>  
> -	/* Descriptor format */
> -	ravb_ring_format(ndev, RAVB_BE);
> -	ravb_ring_format(ndev, RAVB_NC);
> +/* Device init function for Ethernet AVB */

   s/Device/DMAC/. Or this comment shouldn't have been moved.

> +static void ravb_dmac_init_ex(struct net_device *ndev)

   Please no _ex suffixes -- reminds me of Windoze too much. :-)

> +{
> +	struct ravb_private *priv = netdev_priv(ndev);
> +	const struct ravb_drv_data *info = priv->info;
>  
>  	/* Set AVB RX */
>  	ravb_write(ndev,
> @@ -530,6 +519,33 @@ static int ravb_dmac_init(struct net_device *ndev)
>  	ravb_write(ndev, RIC2_QFE0 | RIC2_QFE1 | RIC2_RFFE, RIC2);
>  	/* Frame transmitted, timestamp FIFO updated */
>  	ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC);
> +}
> +
> +static int ravb_dmac_init(struct net_device *ndev)
> +{
> +	struct ravb_private *priv = netdev_priv(ndev);
> +	const struct ravb_drv_data *info = priv->info;
> +	int error;
> +
> +	/* Set CONFIG mode */
> +	error = ravb_config(ndev);
> +	if (error)
> +		return error;
> +
> +	error = ravb_ring_init(ndev, RAVB_BE);
> +	if (error)
> +		return error;
> +	error = ravb_ring_init(ndev, RAVB_NC);
> +	if (error) {
> +		ravb_ring_free(ndev, RAVB_BE);
> +		return error;
> +	}
> +
> +	/* Descriptor format */
> +	ravb_ring_format(ndev, RAVB_BE);
> +	ravb_ring_format(ndev, RAVB_NC);
> +
> +	info->ravb_ops->dmac_init(ndev);
>  
>  	/* Setting the control will start the AVB-DMAC process. */
>  	ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_OPERATION);
> @@ -2018,6 +2034,8 @@ static const struct ravb_ops ravb_gen3_ops = {
>  	.ring_free = ravb_ring_free_rx,
>  	.ring_format = ravb_ring_format_rx,
>  	.alloc_rx_desc = ravb_alloc_rx_desc,
> +	.emac_init = ravb_emac_init_ex,
> +	.dmac_init = ravb_dmac_init_ex,

   Hmm, why not also gen2?!

>  };
[...]

MBR, Sergei

Biju Das Aug. 20, 2021, 3:42 p.m. UTC | #2

Hi Sergei,

Thanks for the feedback.

> <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Subject: Re: [PATCH net-next 12/18] ravb: Factorise {emac,dmac} init
> function
> 
> Hello!
> 
> On 7/22/21 5:13 PM, Biju Das wrote:
> 
> > The R-Car AVB module has Magic packet detection, multiple irq's and
> > timestamp enable features which is not present on RZ/G2L Gigabit
>                                    ^ are

OK. Will fix this in next patch set.

> 
> > Ethernet module. Factorise emac and dmac initialization function to
> > support the later SoC.
> >
> > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > ---
> >  drivers/net/ethernet/renesas/ravb.h      |  2 +
> >  drivers/net/ethernet/renesas/ravb_main.c | 58
> > ++++++++++++++++--------
> >  2 files changed, 40 insertions(+), 20 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/renesas/ravb.h
> > b/drivers/net/ethernet/renesas/ravb.h
> > index d82bfa6e57c1..4d5910dcda86 100644
> > --- a/drivers/net/ethernet/renesas/ravb.h
> > +++ b/drivers/net/ethernet/renesas/ravb.h
> > @@ -992,6 +992,8 @@ struct ravb_ops {
> >  	void (*ring_free)(struct net_device *ndev, int q);
> >  	void (*ring_format)(struct net_device *ndev, int q);
> >  	bool (*alloc_rx_desc)(struct net_device *ndev, int q);
> > +	void (*emac_init)(struct net_device *ndev);
> > +	void (*dmac_init)(struct net_device *ndev);
> >  };
> >
> >  struct ravb_drv_data {
> > diff --git a/drivers/net/ethernet/renesas/ravb_main.c
> > b/drivers/net/ethernet/renesas/ravb_main.c
> > index 3d0f6598b936..e200114376e4 100644
> > --- a/drivers/net/ethernet/renesas/ravb_main.c
> > +++ b/drivers/net/ethernet/renesas/ravb_main.c
> > @@ -454,7 +454,7 @@ static int ravb_ring_init(struct net_device *ndev,
> > int q)  }
> >
> >  /* E-MAC init function */
> > -static void ravb_emac_init(struct net_device *ndev)
> > +static void ravb_emac_init_ex(struct net_device *ndev)
> >  {
> >  	/* Receive frame limit set register */
> >  	ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN,
> > RFLR); @@ -480,30 +480,19 @@ static void ravb_emac_init(struct
> net_device *ndev)
> >  	ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP,
> > ECSIPR);  }
> >
> > -/* Device init function for Ethernet AVB */
> 
>    Grr, this comment seems oudated...

OK.
> 
> > -static int ravb_dmac_init(struct net_device *ndev)
> > +static void ravb_emac_init(struct net_device *ndev)
> >  {
> >  	struct ravb_private *priv = netdev_priv(ndev);
> >  	const struct ravb_drv_data *info = priv->info;
> > -	int error;
> >
> > -	/* Set CONFIG mode */
> > -	error = ravb_config(ndev);
> > -	if (error)
> > -		return error;
> > -
> > -	error = ravb_ring_init(ndev, RAVB_BE);
> > -	if (error)
> > -		return error;
> > -	error = ravb_ring_init(ndev, RAVB_NC);
> > -	if (error) {
> > -		ravb_ring_free(ndev, RAVB_BE);
> > -		return error;
> > -	}
> > +	info->ravb_ops->emac_init(ndev);
> > +}
> 
>    The whole ravb_emac_init() now consists only of a single method call?
> Why do we need it at all?

OK will assign info->emac_init with ravb_emac_init, so GbEthernet just need to
fill emac_init function. I will remove the function "ravb_emac_init_ex".


> 
> >
> > -	/* Descriptor format */
> > -	ravb_ring_format(ndev, RAVB_BE);
> > -	ravb_ring_format(ndev, RAVB_NC);
> > +/* Device init function for Ethernet AVB */
> 
>    s/Device/DMAC/. Or this comment shouldn't have been moved.

OK.

> 
> > +static void ravb_dmac_init_ex(struct net_device *ndev)
> 
>    Please no _ex suffixes -- reminds me of Windoze too much. :-)

OK. Will change it to ravb_device_init

Regards,
Biju

> 
> > +{
> > +	struct ravb_private *priv = netdev_priv(ndev);
> > +	const struct ravb_drv_data *info = priv->info;
> >
> >  	/* Set AVB RX */
> >  	ravb_write(ndev,
> > @@ -530,6 +519,33 @@ static int ravb_dmac_init(struct net_device *ndev)
> >  	ravb_write(ndev, RIC2_QFE0 | RIC2_QFE1 | RIC2_RFFE, RIC2);
> >  	/* Frame transmitted, timestamp FIFO updated */
> >  	ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC);
> > +}
> > +
> > +static int ravb_dmac_init(struct net_device *ndev) {
> > +	struct ravb_private *priv = netdev_priv(ndev);
> > +	const struct ravb_drv_data *info = priv->info;
> > +	int error;
> > +
> > +	/* Set CONFIG mode */
> > +	error = ravb_config(ndev);
> > +	if (error)
> > +		return error;
> > +
> > +	error = ravb_ring_init(ndev, RAVB_BE);
> > +	if (error)
> > +		return error;
> > +	error = ravb_ring_init(ndev, RAVB_NC);
> > +	if (error) {
> > +		ravb_ring_free(ndev, RAVB_BE);
> > +		return error;
> > +	}
> > +
> > +	/* Descriptor format */
> > +	ravb_ring_format(ndev, RAVB_BE);
> > +	ravb_ring_format(ndev, RAVB_NC);
> > +
> > +	info->ravb_ops->dmac_init(ndev);
> >
> >  	/* Setting the control will start the AVB-DMAC process. */
> >  	ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_OPERATION); @@ -2018,6
> > +2034,8 @@ static const struct ravb_ops ravb_gen3_ops = {
> >  	.ring_free = ravb_ring_free_rx,
> >  	.ring_format = ravb_ring_format_rx,
> >  	.alloc_rx_desc = ravb_alloc_rx_desc,
> > +	.emac_init = ravb_emac_init_ex,
> > +	.dmac_init = ravb_dmac_init_ex,
> 
>    Hmm, why not also gen2?!

Sergey Shtylyov Aug. 20, 2021, 6:57 p.m. UTC | #3

On 8/20/21 6:42 PM, Biju Das wrote:

[...]
>>> The R-Car AVB module has Magic packet detection, multiple irq's and
>>> timestamp enable features which is not present on RZ/G2L Gigabit
>>                                    ^ are
> 
> OK. Will fix this in next patch set.
> 
>>
>>> Ethernet module. Factorise emac and dmac initialization function to
>>> support the later SoC.
>>>
>>> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
>>> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>>> ---
>>>  drivers/net/ethernet/renesas/ravb.h      |  2 +
>>>  drivers/net/ethernet/renesas/ravb_main.c | 58
>>> ++++++++++++++++--------
>>>  2 files changed, 40 insertions(+), 20 deletions(-)
>>>
>>> diff --git a/drivers/net/ethernet/renesas/ravb.h
>>> b/drivers/net/ethernet/renesas/ravb.h
>>> index d82bfa6e57c1..4d5910dcda86 100644
>>> --- a/drivers/net/ethernet/renesas/ravb.h
>>> +++ b/drivers/net/ethernet/renesas/ravb.h
>>> @@ -992,6 +992,8 @@ struct ravb_ops {
>>>  	void (*ring_free)(struct net_device *ndev, int q);
>>>  	void (*ring_format)(struct net_device *ndev, int q);
>>>  	bool (*alloc_rx_desc)(struct net_device *ndev, int q);
>>> +	void (*emac_init)(struct net_device *ndev);
>>> +	void (*dmac_init)(struct net_device *ndev);
>>>  };
>>>
>>>  struct ravb_drv_data {
>>> diff --git a/drivers/net/ethernet/renesas/ravb_main.c
>>> b/drivers/net/ethernet/renesas/ravb_main.c
>>> index 3d0f6598b936..e200114376e4 100644
>>> --- a/drivers/net/ethernet/renesas/ravb_main.c
>>> +++ b/drivers/net/ethernet/renesas/ravb_main.c
>>> @@ -454,7 +454,7 @@ static int ravb_ring_init(struct net_device *ndev,
>>> int q)  }
>>>
>>>  /* E-MAC init function */
>>> -static void ravb_emac_init(struct net_device *ndev)
>>> +static void ravb_emac_init_ex(struct net_device *ndev)
>>>  {
>>>  	/* Receive frame limit set register */
>>>  	ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN,
>>> RFLR); @@ -480,30 +480,19 @@ static void ravb_emac_init(struct
>> net_device *ndev)
>>>  	ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP,
>>> ECSIPR);  }
>>>
>>> -/* Device init function for Ethernet AVB */
>>
>>    Grr, this comment seems oudated...
> 
> OK.

   Just don't move the comment. :-)

>>> -static int ravb_dmac_init(struct net_device *ndev)
>>> +static void ravb_emac_init(struct net_device *ndev)
>>>  {
>>>  	struct ravb_private *priv = netdev_priv(ndev);
>>>  	const struct ravb_drv_data *info = priv->info;
>>> -	int error;
>>>
>>> -	/* Set CONFIG mode */
>>> -	error = ravb_config(ndev);
>>> -	if (error)
>>> -		return error;
>>> -
>>> -	error = ravb_ring_init(ndev, RAVB_BE);
>>> -	if (error)
>>> -		return error;
>>> -	error = ravb_ring_init(ndev, RAVB_NC);
>>> -	if (error) {
>>> -		ravb_ring_free(ndev, RAVB_BE);
>>> -		return error;
>>> -	}
>>> +	info->ravb_ops->emac_init(ndev);
>>> +}
>>
>>    The whole ravb_emac_init() now consists only of a single method call?
>> Why do we need it at all?
> 
> OK will assign info->emac_init with ravb_emac_init, so GbEthernet just need to
> fill emac_init function. I will remove the function "ravb_emac_init_ex".

  Will the EMAC init methods differ so much as to we should provide 2 separate
implementations?

[...]
>>> +static void ravb_dmac_init_ex(struct net_device *ndev)
>>
>>    Please no _ex suffixes -- reminds me of Windoze too much. :-)
> 
> OK. Will change it to ravb_device_init

   Ugh! Why not leave it named ravb_dmac_init()?

> Regards,
> Biju
> 
>>
>>> +{
>>> +	struct ravb_private *priv = netdev_priv(ndev);
>>> +	const struct ravb_drv_data *info = priv->info;
>>>
>>>  	/* Set AVB RX */
>>>  	ravb_write(ndev,
>>> @@ -530,6 +519,33 @@ static int ravb_dmac_init(struct net_device *ndev)
>>>  	ravb_write(ndev, RIC2_QFE0 | RIC2_QFE1 | RIC2_RFFE, RIC2);
>>>  	/* Frame transmitted, timestamp FIFO updated */
>>>  	ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC);
>>> +}
>>> +
>>> +static int ravb_dmac_init(struct net_device *ndev) {
>>> +	struct ravb_private *priv = netdev_priv(ndev);
>>> +	const struct ravb_drv_data *info = priv->info;
>>> +	int error;
>>> +
>>> +	/* Set CONFIG mode */
>>> +	error = ravb_config(ndev);
>>> +	if (error)
>>> +		return error;
>>> +
>>> +	error = ravb_ring_init(ndev, RAVB_BE);
>>> +	if (error)
>>> +		return error;
>>> +	error = ravb_ring_init(ndev, RAVB_NC);
>>> +	if (error) {
>>> +		ravb_ring_free(ndev, RAVB_BE);
>>> +		return error;
>>> +	}
>>> +
>>> +	/* Descriptor format */
>>> +	ravb_ring_format(ndev, RAVB_BE);
>>> +	ravb_ring_format(ndev, RAVB_NC);
>>> +
>>> +	info->ravb_ops->dmac_init(ndev);
>>>
>>>  	/* Setting the control will start the AVB-DMAC process. */
>>>  	ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_OPERATION); @@ -2018,6
>>> +2034,8 @@ static const struct ravb_ops ravb_gen3_ops = {
>>>  	.ring_free = ravb_ring_free_rx,
>>>  	.ring_format = ravb_ring_format_rx,
>>>  	.alloc_rx_desc = ravb_alloc_rx_desc,
>>> +	.emac_init = ravb_emac_init_ex,
>>> +	.dmac_init = ravb_dmac_init_ex,
>>
>>    Hmm, why not also gen2?!

   The question remained unreplied?... :-/

MBR, Sergey

Biju Das Aug. 20, 2021, 7:44 p.m. UTC | #4

Hi Sergei,

> Subject: Re: [PATCH net-next 12/18] ravb: Factorise {emac,dmac} init
> function
> 
> On 8/20/21 6:42 PM, Biju Das wrote:
> 
> [...]
> >>> The R-Car AVB module has Magic packet detection, multiple irq's and
> >>> timestamp enable features which is not present on RZ/G2L Gigabit
> >>                                    ^ are
> >
> > OK. Will fix this in next patch set.
> >
> >>
> >>> Ethernet module. Factorise emac and dmac initialization function to
> >>> support the later SoC.
> >>>
> >>> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> >>> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> >>> ---
> >>>  drivers/net/ethernet/renesas/ravb.h      |  2 +
> >>>  drivers/net/ethernet/renesas/ravb_main.c | 58
> >>> ++++++++++++++++--------
> >>>  2 files changed, 40 insertions(+), 20 deletions(-)
> >>>
> >>> diff --git a/drivers/net/ethernet/renesas/ravb.h
> >>> b/drivers/net/ethernet/renesas/ravb.h
> >>> index d82bfa6e57c1..4d5910dcda86 100644
> >>> --- a/drivers/net/ethernet/renesas/ravb.h
> >>> +++ b/drivers/net/ethernet/renesas/ravb.h
> >>> @@ -992,6 +992,8 @@ struct ravb_ops {
> >>>  	void (*ring_free)(struct net_device *ndev, int q);
> >>>  	void (*ring_format)(struct net_device *ndev, int q);
> >>>  	bool (*alloc_rx_desc)(struct net_device *ndev, int q);
> >>> +	void (*emac_init)(struct net_device *ndev);
> >>> +	void (*dmac_init)(struct net_device *ndev);
> >>>  };
> >>>
> >>>  struct ravb_drv_data {
> >>> diff --git a/drivers/net/ethernet/renesas/ravb_main.c
> >>> b/drivers/net/ethernet/renesas/ravb_main.c
> >>> index 3d0f6598b936..e200114376e4 100644
> >>> --- a/drivers/net/ethernet/renesas/ravb_main.c
> >>> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> >>> @@ -454,7 +454,7 @@ static int ravb_ring_init(struct net_device
> >>> *ndev, int q)  }
> >>>
> >>>  /* E-MAC init function */
> >>> -static void ravb_emac_init(struct net_device *ndev)
> >>> +static void ravb_emac_init_ex(struct net_device *ndev)
> >>>  {
> >>>  	/* Receive frame limit set register */
> >>>  	ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN,
> >>> RFLR); @@ -480,30 +480,19 @@ static void ravb_emac_init(struct
> >> net_device *ndev)
> >>>  	ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP,
> >>> ECSIPR);  }
> >>>
> >>> -/* Device init function for Ethernet AVB */
> >>
> >>    Grr, this comment seems oudated...
> >
> > OK.
> 
>    Just don't move the comment. :-)
> 
> >>> -static int ravb_dmac_init(struct net_device *ndev)
> >>> +static void ravb_emac_init(struct net_device *ndev)
> >>>  {
> >>>  	struct ravb_private *priv = netdev_priv(ndev);
> >>>  	const struct ravb_drv_data *info = priv->info;
> >>> -	int error;
> >>>
> >>> -	/* Set CONFIG mode */
> >>> -	error = ravb_config(ndev);
> >>> -	if (error)
> >>> -		return error;
> >>> -
> >>> -	error = ravb_ring_init(ndev, RAVB_BE);
> >>> -	if (error)
> >>> -		return error;
> >>> -	error = ravb_ring_init(ndev, RAVB_NC);
> >>> -	if (error) {
> >>> -		ravb_ring_free(ndev, RAVB_BE);
> >>> -		return error;
> >>> -	}
> >>> +	info->ravb_ops->emac_init(ndev);
> >>> +}
> >>
> >>    The whole ravb_emac_init() now consists only of a single method
> call?
> >> Why do we need it at all?
> >
> > OK will assign info->emac_init with ravb_emac_init, so GbEthernet just
> > need to fill emac_init function. I will remove the function
> "ravb_emac_init_ex".
> 
>   Will the EMAC init methods differ so much as to we should provide 2
> separate implementations?
> 
> [...]
> >>> +static void ravb_dmac_init_ex(struct net_device *ndev)
> >>
> >>    Please no _ex suffixes -- reminds me of Windoze too much. :-)
> >
> > OK. Will change it to ravb_device_init
> 
>    Ugh! Why not leave it named ravb_dmac_init()?

Please see [1] below and also planning to send another 10 small incremental patches,
So that it is clear to every one.

> 
> > Regards,
> > Biju
> >
> >>
> >>> +{
> >>> +	struct ravb_private *priv = netdev_priv(ndev);
> >>> +	const struct ravb_drv_data *info = priv->info;
> >>>
> >>>  	/* Set AVB RX */
> >>>  	ravb_write(ndev,
> >>> @@ -530,6 +519,33 @@ static int ravb_dmac_init(struct net_device
> *ndev)
> >>>  	ravb_write(ndev, RIC2_QFE0 | RIC2_QFE1 | RIC2_RFFE, RIC2);
> >>>  	/* Frame transmitted, timestamp FIFO updated */
> >>>  	ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC);
> >>> +}
> >>> +
> >>> +static int ravb_dmac_init(struct net_device *ndev) {
> >>> +	struct ravb_private *priv = netdev_priv(ndev);
> >>> +	const struct ravb_drv_data *info = priv->info;
> >>> +	int error;
> >>> +
> >>> +	/* Set CONFIG mode */
> >>> +	error = ravb_config(ndev);
> >>> +	if (error)
> >>> +		return error;
> >>> +
> >>> +	error = ravb_ring_init(ndev, RAVB_BE);
> >>> +	if (error)
> >>> +		return error;
> >>> +	error = ravb_ring_init(ndev, RAVB_NC);
> >>> +	if (error) {
> >>> +		ravb_ring_free(ndev, RAVB_BE);
> >>> +		return error;
> >>> +	}
> >>> +
> >>> +	/* Descriptor format */
> >>> +	ravb_ring_format(ndev, RAVB_BE);
> >>> +	ravb_ring_format(ndev, RAVB_NC);
> >>> +
> >>> +	info->ravb_ops->dmac_init(ndev);
> >>>
> >>>  	/* Setting the control will start the AVB-DMAC process. */
> >>>  	ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_OPERATION); @@ -2018,6
> >>> +2034,8 @@ static const struct ravb_ops ravb_gen3_ops = {
> >>>  	.ring_free = ravb_ring_free_rx,
> >>>  	.ring_format = ravb_ring_format_rx,
> >>>  	.alloc_rx_desc = ravb_alloc_rx_desc,
> >>> +	.emac_init = ravb_emac_init_ex,
> >>> +	.dmac_init = ravb_dmac_init_ex,
> >>
> >>    Hmm, why not also gen2?!
> 
>    The question remained unreplied?... :-/

ravb_ops for gen3 and gen2 same. But RZ/G2L have different function pointers[1].

As agreed on next patchset, we are avoiding indirection and it will be hw_ifo.
In that case there will be 1 entry in gen3 and 1 entry in gen2. Hope this clears
Your doubts.

[1] https://patchwork.kernel.org/project/linux-renesas-soc/patch/20210722141351.13668-18-biju.das.jz@bp.renesas.com/

Cheers,
Biju

diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index d82bfa6e57c1..4d5910dcda86 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -992,6 +992,8 @@  struct ravb_ops {
 	void (*ring_free)(struct net_device *ndev, int q);
 	void (*ring_format)(struct net_device *ndev, int q);
 	bool (*alloc_rx_desc)(struct net_device *ndev, int q);
+	void (*emac_init)(struct net_device *ndev);
+	void (*dmac_init)(struct net_device *ndev);
 };
 
 struct ravb_drv_data {
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 3d0f6598b936..e200114376e4 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -454,7 +454,7 @@  static int ravb_ring_init(struct net_device *ndev, int q)
 }
 
 /* E-MAC init function */
-static void ravb_emac_init(struct net_device *ndev)
+static void ravb_emac_init_ex(struct net_device *ndev)
 {
 	/* Receive frame limit set register */
 	ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR);
@@ -480,30 +480,19 @@  static void ravb_emac_init(struct net_device *ndev)
 	ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP, ECSIPR);
 }
 
-/* Device init function for Ethernet AVB */
-static int ravb_dmac_init(struct net_device *ndev)
+static void ravb_emac_init(struct net_device *ndev)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
 	const struct ravb_drv_data *info = priv->info;
-	int error;
 
-	/* Set CONFIG mode */
-	error = ravb_config(ndev);
-	if (error)
-		return error;
-
-	error = ravb_ring_init(ndev, RAVB_BE);
-	if (error)
-		return error;
-	error = ravb_ring_init(ndev, RAVB_NC);
-	if (error) {
-		ravb_ring_free(ndev, RAVB_BE);
-		return error;
-	}
+	info->ravb_ops->emac_init(ndev);
+}
 
-	/* Descriptor format */
-	ravb_ring_format(ndev, RAVB_BE);
-	ravb_ring_format(ndev, RAVB_NC);
+/* Device init function for Ethernet AVB */
+static void ravb_dmac_init_ex(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_drv_data *info = priv->info;
 
 	/* Set AVB RX */
 	ravb_write(ndev,
@@ -530,6 +519,33 @@  static int ravb_dmac_init(struct net_device *ndev)
 	ravb_write(ndev, RIC2_QFE0 | RIC2_QFE1 | RIC2_RFFE, RIC2);
 	/* Frame transmitted, timestamp FIFO updated */
 	ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC);
+}
+
+static int ravb_dmac_init(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_drv_data *info = priv->info;
+	int error;
+
+	/* Set CONFIG mode */
+	error = ravb_config(ndev);
+	if (error)
+		return error;
+
+	error = ravb_ring_init(ndev, RAVB_BE);
+	if (error)
+		return error;
+	error = ravb_ring_init(ndev, RAVB_NC);
+	if (error) {
+		ravb_ring_free(ndev, RAVB_BE);
+		return error;
+	}
+
+	/* Descriptor format */
+	ravb_ring_format(ndev, RAVB_BE);
+	ravb_ring_format(ndev, RAVB_NC);
+
+	info->ravb_ops->dmac_init(ndev);
 
 	/* Setting the control will start the AVB-DMAC process. */
 	ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_OPERATION);
@@ -2018,6 +2034,8 @@  static const struct ravb_ops ravb_gen3_ops = {
 	.ring_free = ravb_ring_free_rx,
 	.ring_format = ravb_ring_format_rx,
 	.alloc_rx_desc = ravb_alloc_rx_desc,
+	.emac_init = ravb_emac_init_ex,
+	.dmac_init = ravb_dmac_init_ex,
 };
 
 static const struct ravb_drv_data ravb_gen3_data = {

[net-next,12/18] ravb: Factorise {emac,dmac} init function

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