diff mbox series

[net-next,12/13] ravb: Factorise ravb_emac_init function

Message ID 20210825070154.14336-13-biju.das.jz@bp.renesas.com (mailing list archive)
State Accepted
Commit 511d74d9d86ceccb3463fd49adf9de95d4cb3772
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 
The E-MAC IP on the R-Car AVB module has different initialization
parameters for RX frame size, duplex settings, different offset
for transfer speed setting and has magic packet detection support
compared to E-MAC on RZ/G2L Gigabit Ethernet module. Factorise
the ravb_emac_init 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. 27, 2021, 7:52 p.m. UTC | #1 
On 8/25/21 10:01 AM, Biju Das wrote:

> The E-MAC IP on the R-Car AVB module has different initialization
> parameters for RX frame size, duplex settings, different offset
> for transfer speed setting and has magic packet detection support
> compared to E-MAC on RZ/G2L Gigabit Ethernet module. Factorise
> the ravb_emac_init function to support the later SoC.

   Again, couldn't we resolve these differencies like the sh_eth driver does,
by adding the register values into the *struct* ravb_hw_info?

> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
[...]

MBR, Sergey
Biju Das Aug. 28, 2021, 9:34 a.m. UTC | #2 
Hi Sergei,

Thanks for the feedback.

> Subject: Re: [PATCH net-next 12/13] ravb: Factorise ravb_emac_init
> function
> 
> On 8/25/21 10:01 AM, Biju Das wrote:
> 
> > The E-MAC IP on the R-Car AVB module has different initialization
> > parameters for RX frame size, duplex settings, different offset for
> > transfer speed setting and has magic packet detection support compared
> > to E-MAC on RZ/G2L Gigabit Ethernet module. Factorise the
> > ravb_emac_init function to support the later SoC.
> 
>    Again, couldn't we resolve these differencies like the sh_eth driver
> does, by adding the register values into the *struct* ravb_hw_info?


I will evaluate your proposal in terms of code size and data size
And with the current code and share the details in next RFC patchset
for supporting RZ/G2L with emac_init function.
Based on the RFC discussion, we can conclude it.

Currently by looking at your proposal, I am seeing duplication of
Data in R-Car Gen3 and R-Car Gen2.

Multiple if statement for handling duplex, initialising CSR0(Checksum operating mode register),
CXR31(In-band status register)


Regards,
Biju


> 
> > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> [...]
> 
> MBR, Sergey
diff mbox series

Patch

diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 24a3abd00053..117eb22349c5 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -987,6 +987,7 @@  struct ravb_hw_info {
 	void (*set_rate)(struct net_device *ndev);
 	int (*set_rx_csum_feature)(struct net_device *ndev, netdev_features_t features);
 	void (*dmac_init)(struct net_device *ndev);
+	void (*emac_init)(struct net_device *ndev);
 	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 391e7927ea08..7a144b45e41d 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -425,8 +425,7 @@  static int ravb_ring_init(struct net_device *ndev, int q)
 	return -ENOMEM;
 }
 
-/* E-MAC init function */
-static void ravb_emac_init(struct net_device *ndev)
+static void ravb_rcar_emac_init(struct net_device *ndev)
 {
 	/* Receive frame limit set register */
 	ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR);
@@ -452,6 +451,15 @@  static void ravb_emac_init(struct net_device *ndev)
 	ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP, ECSIPR);
 }
 
+/* E-MAC init function */
+static void ravb_emac_init(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	const struct ravb_hw_info *info = priv->info;
+
+	info->emac_init(ndev);
+}
+
 static void ravb_rcar_dmac_init(struct net_device *ndev)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
@@ -1999,6 +2007,7 @@  static const struct ravb_hw_info ravb_gen3_hw_info = {
 	.set_rate = ravb_set_rate,
 	.set_rx_csum_feature = ravb_set_features_rx_csum,
 	.dmac_init = ravb_rcar_dmac_init,
+	.emac_init = ravb_rcar_emac_init,
 	.gstrings_stats = ravb_gstrings_stats,
 	.gstrings_size = sizeof(ravb_gstrings_stats),
 	.net_hw_features = NETIF_F_RXCSUM,
@@ -2019,6 +2028,7 @@  static const struct ravb_hw_info ravb_gen2_hw_info = {
 	.set_rate = ravb_set_rate,
 	.set_rx_csum_feature = ravb_set_features_rx_csum,
 	.dmac_init = ravb_rcar_dmac_init,
+	.emac_init = ravb_rcar_emac_init,
 	.gstrings_stats = ravb_gstrings_stats,
 	.gstrings_size = sizeof(ravb_gstrings_stats),
 	.net_hw_features = NETIF_F_RXCSUM,