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[net-next,08/13] ravb: Factorise ravb_rx function

Message ID 20210825070154.14336-9-biju.das.jz@bp.renesas.com (mailing list archive)
State Accepted
Commit d5d95c11365bc880669bbc52786b176cf60dcd92
Delegated to: Netdev Maintainers
Headers show
Series Add Factorisation code to support Gigabit Ethernet driver | expand

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Commit Message

Biju Das Aug. 25, 2021, 7:01 a.m. UTC 
R-Car uses an extended descriptor in RX whereas, RZ/G2L uses
normal descriptor in RX. Factorise the ravb_rx 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      |  1 +
 drivers/net/ethernet/renesas/ravb_main.c | 14 ++++++++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)

Comments

Sergey Shtylyov Aug. 26, 2021, 8:41 p.m. UTC | #1 
On 8/25/21 10:01 AM, Biju Das wrote:

> R-Car uses an extended descriptor in RX whereas, RZ/G2L uses
> normal descriptor in RX. Factorise the ravb_rx 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>
[...]
> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index 148c974499b4..1cace5324261 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -562,8 +562,7 @@ static void ravb_rx_csum(struct sk_buff *skb)
>  	skb_trim(skb, skb->len - sizeof(__sum16));
>  }
>  
> -/* Packet receive function for Ethernet AVB */
> -static bool ravb_rx(struct net_device *ndev, int *quota, int q)
> +static bool ravb_rcar_rx(struct net_device *ndev, int *quota, int q)

   Mhm, isn't this too large a function to duplicate it all for RZ-G2?

[...]

MBR, Sergey
Biju Das Aug. 27, 2021, 6:28 a.m. UTC | #2 
Hi Sergei,

> Subject: Re: [PATCH net-next 08/13] ravb: Factorise ravb_rx function
> 
> On 8/25/21 10:01 AM, Biju Das wrote:
> 
> > R-Car uses an extended descriptor in RX whereas, RZ/G2L uses normal
> > descriptor in RX. Factorise the ravb_rx 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>
> [...]
> > diff --git a/drivers/net/ethernet/renesas/ravb_main.c
> > b/drivers/net/ethernet/renesas/ravb_main.c
> > index 148c974499b4..1cace5324261 100644
> > --- a/drivers/net/ethernet/renesas/ravb_main.c
> > +++ b/drivers/net/ethernet/renesas/ravb_main.c
> > @@ -562,8 +562,7 @@ static void ravb_rx_csum(struct sk_buff *skb)
> >  	skb_trim(skb, skb->len - sizeof(__sum16));  }
> >
> > -/* Packet receive function for Ethernet AVB */ -static bool
> > ravb_rx(struct net_device *ndev, int *quota, int q)
> > +static bool ravb_rcar_rx(struct net_device *ndev, int *quota, int q)
> 
>    Mhm, isn't this too large a function to duplicate it all for RZ-G2?

For your reference, it is a large change. See [1].
[1] https://patchwork.kernel.org/project/linux-renesas-soc/patch/20210722141351.13668-18-biju.das.jz@bp.renesas.com/

Currently I am working on the name change and next RFC patchset for started adding
Initial support for RZ/G2. I am expecting your valuable suggestion on that granular
RFC Patch for RZ/G2(ravb_rx) function.

Regards,
Biju

> 
> [...]
> 
> MBR, Sergey
diff mbox series

Patch

diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 39df045b1a0b..00f2d67b4dad 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -983,6 +983,7 @@  struct ravb_hw_info {
 	void (*rx_ring_free)(struct net_device *ndev, int q);
 	void (*rx_ring_format)(struct net_device *ndev, int q);
 	void *(*alloc_rx_desc)(struct net_device *ndev, int q);
+	bool (*receive)(struct net_device *ndev, int *quota, int q);
 	const char (*gstrings_stats)[ETH_GSTRING_LEN];
 	size_t gstrings_size;
 	netdev_features_t net_hw_features;
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 148c974499b4..1cace5324261 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -562,8 +562,7 @@  static void ravb_rx_csum(struct sk_buff *skb)
 	skb_trim(skb, skb->len - sizeof(__sum16));
 }
 
-/* Packet receive function for Ethernet AVB */
-static bool ravb_rx(struct net_device *ndev, int *quota, int q)
+static bool ravb_rcar_rx(struct net_device *ndev, int *quota, int q)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
 	const struct ravb_hw_info *info = priv->info;
@@ -677,6 +676,15 @@  static bool ravb_rx(struct net_device *ndev, int *quota, int q)
 	return boguscnt <= 0;
 }
 
+/* Packet receive function for Ethernet AVB */
+static bool ravb_rx(struct net_device *ndev, int *quota, int q)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+
+	return info->receive(ndev, quota, q);
+}
+
 static void ravb_rcv_snd_disable(struct net_device *ndev)
 {
 	/* Disable TX and RX */
@@ -1969,6 +1977,7 @@  static const struct ravb_hw_info ravb_gen3_hw_info = {
 	.rx_ring_free = ravb_rx_ring_free,
 	.rx_ring_format = ravb_rx_ring_format,
 	.alloc_rx_desc = ravb_alloc_rx_desc,
+	.receive = ravb_rcar_rx,
 	.gstrings_stats = ravb_gstrings_stats,
 	.gstrings_size = sizeof(ravb_gstrings_stats),
 	.net_hw_features = NETIF_F_RXCSUM,
@@ -1985,6 +1994,7 @@  static const struct ravb_hw_info ravb_gen2_hw_info = {
 	.rx_ring_free = ravb_rx_ring_free,
 	.rx_ring_format = ravb_rx_ring_format,
 	.alloc_rx_desc = ravb_alloc_rx_desc,
+	.receive = ravb_rcar_rx,
 	.gstrings_stats = ravb_gstrings_stats,
 	.gstrings_size = sizeof(ravb_gstrings_stats),
 	.net_hw_features = NETIF_F_RXCSUM,