diff mbox series

[net-next,11/18] ravb: Factorise ravb_ring_init function

Message ID 20210722141351.13668-12-biju.das.jz@bp.renesas.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series Add Gigabit Ethernet driver support | expand

Commit Message

Biju Das July 22, 2021, 2:13 p.m. UTC 
The ravb_ring_init function uses extended descriptor in rx for
R-Car and normal descriptor for RZ/G2L. Factorise rx ring buffer
allocation so that it can support 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      |  1 +
 drivers/net/ethernet/renesas/ravb_main.c | 20 +++++++++++++++-----
 2 files changed, 16 insertions(+), 5 deletions(-)

Comments

Sergey Shtylyov July 29, 2021, 6:53 p.m. UTC | #1 
On 7/22/21 5:13 PM, Biju Das wrote:

> The ravb_ring_init function uses extended descriptor in rx for
> R-Car and normal descriptor for RZ/G2L. Factorise rx ring buffer
> allocation so that it can support later SoC.

   In this case I think you factored out the function in question... but my ENglish is possibly
too weak. :-)

> 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      |  1 +
>  drivers/net/ethernet/renesas/ravb_main.c | 20 +++++++++++++++-----
>  2 files changed, 16 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
> index a3258c5d0c3d..d82bfa6e57c1 100644
> --- a/drivers/net/ethernet/renesas/ravb.h
> +++ b/drivers/net/ethernet/renesas/ravb.h
> @@ -991,6 +991,7 @@ enum ravb_chip_id {
>  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);

  Aha, rx_ appears at last! :-)


> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index c23f0d420c70..3d0f6598b936 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -384,6 +384,19 @@ static void ravb_ring_format(struct net_device *ndev, int q)
>  }
>  
>  /* Init skb and descriptor buffer for Ethernet AVB */
> +static bool ravb_alloc_rx_desc(struct net_device *ndev, int q)

    Why *bool*? I think we shold just return a pointer allocated.

> +{
> +	struct ravb_private *priv = netdev_priv(ndev);
> +	int ring_size;
> +
> +	ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1);
> +
> +	priv->rx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
> +					      &priv->rx_desc_dma[q],
> +					      GFP_KERNEL);
> +	return priv->rx_ring[q];
> +}
> +
>  static int ravb_ring_init(struct net_device *ndev, int q)
>  {
>  	struct ravb_private *priv = netdev_priv(ndev);
> @@ -418,11 +431,7 @@ static int ravb_ring_init(struct net_device *ndev, int q)
>  	}
>  
>  	/* Allocate all RX descriptors. */
> -	ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1);
> -	priv->rx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
> -					      &priv->rx_desc_dma[q],
> -					      GFP_KERNEL);
> -	if (!priv->rx_ring[q])
> +	if (!info->ravb_ops->alloc_rx_desc(ndev, q))
>  		goto error;
>  
>  	priv->dirty_rx[q] = 0;
> @@ -2008,6 +2017,7 @@ static int ravb_mdio_release(struct ravb_private *priv)
>  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,
>  };
>  
>  static const struct ravb_drv_data ravb_gen3_data = {
>
Biju Das July 30, 2021, 6:54 a.m. UTC | #2 
Hi Sergei,

Thanks for the feedback.

> Subject: Re: [PATCH net-next 11/18] ravb: Factorise ravb_ring_init
> function
> 
> On 7/22/21 5:13 PM, Biju Das wrote:
> 
> > The ravb_ring_init function uses extended descriptor in rx for R-Car
> > and normal descriptor for RZ/G2L. Factorise rx ring buffer allocation
> > so that it can support later SoC.
> 
>    In this case I think you factored out the function in question... but
> my ENglish is possibly too weak. :-)

OK. I meant add a helper function for rx ring buffer allocation.

> 
> > 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      |  1 +
> >  drivers/net/ethernet/renesas/ravb_main.c | 20 +++++++++++++++-----
> >  2 files changed, 16 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/renesas/ravb.h
> > b/drivers/net/ethernet/renesas/ravb.h
> > index a3258c5d0c3d..d82bfa6e57c1 100644
> > --- a/drivers/net/ethernet/renesas/ravb.h
> > +++ b/drivers/net/ethernet/renesas/ravb.h
> > @@ -991,6 +991,7 @@ enum ravb_chip_id {  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);
> 
>   Aha, rx_ appears at last! :-)
> 
> 
> > diff --git a/drivers/net/ethernet/renesas/ravb_main.c
> > b/drivers/net/ethernet/renesas/ravb_main.c
> > index c23f0d420c70..3d0f6598b936 100644
> > --- a/drivers/net/ethernet/renesas/ravb_main.c
> > +++ b/drivers/net/ethernet/renesas/ravb_main.c
> > @@ -384,6 +384,19 @@ static void ravb_ring_format(struct net_device
> > *ndev, int q)  }
> >
> >  /* Init skb and descriptor buffer for Ethernet AVB */
> > +static bool ravb_alloc_rx_desc(struct net_device *ndev, int q)
> 
>     Why *bool*? I think we shold just return a pointer allocated.

Ah OK.

Cheers,
Biju

> 
> > +{
> > +	struct ravb_private *priv = netdev_priv(ndev);
> > +	int ring_size;
> > +
> > +	ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] +
> > +1);
> > +
> > +	priv->rx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
> > +					      &priv->rx_desc_dma[q],
> > +					      GFP_KERNEL);
> > +	return priv->rx_ring[q];
> > +}
> > +
> >  static int ravb_ring_init(struct net_device *ndev, int q)  {
> >  	struct ravb_private *priv = netdev_priv(ndev); @@ -418,11 +431,7 @@
> > static int ravb_ring_init(struct net_device *ndev, int q)
> >  	}
> >
> >  	/* Allocate all RX descriptors. */
> > -	ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] +
> 1);
> > -	priv->rx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
> > -					      &priv->rx_desc_dma[q],
> > -					      GFP_KERNEL);
> > -	if (!priv->rx_ring[q])
> > +	if (!info->ravb_ops->alloc_rx_desc(ndev, q))
> >  		goto error;
> >
> >  	priv->dirty_rx[q] = 0;
> > @@ -2008,6 +2017,7 @@ static int ravb_mdio_release(struct ravb_private
> > *priv)  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,
> >  };
> >
> >  static const struct ravb_drv_data ravb_gen3_data = {
> >
diff mbox series

Patch

diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index a3258c5d0c3d..d82bfa6e57c1 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -991,6 +991,7 @@  enum ravb_chip_id {
 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);
 };
 
 struct ravb_drv_data {
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index c23f0d420c70..3d0f6598b936 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -384,6 +384,19 @@  static void ravb_ring_format(struct net_device *ndev, int q)
 }
 
 /* Init skb and descriptor buffer for Ethernet AVB */
+static bool ravb_alloc_rx_desc(struct net_device *ndev, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	int ring_size;
+
+	ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1);
+
+	priv->rx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
+					      &priv->rx_desc_dma[q],
+					      GFP_KERNEL);
+	return priv->rx_ring[q];
+}
+
 static int ravb_ring_init(struct net_device *ndev, int q)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
@@ -418,11 +431,7 @@  static int ravb_ring_init(struct net_device *ndev, int q)
 	}
 
 	/* Allocate all RX descriptors. */
-	ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1);
-	priv->rx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
-					      &priv->rx_desc_dma[q],
-					      GFP_KERNEL);
-	if (!priv->rx_ring[q])
+	if (!info->ravb_ops->alloc_rx_desc(ndev, q))
 		goto error;
 
 	priv->dirty_rx[q] = 0;
@@ -2008,6 +2017,7 @@  static int ravb_mdio_release(struct ravb_private *priv)
 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,
 };
 
 static const struct ravb_drv_data ravb_gen3_data = {