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Date: Fri, 20 Aug 2021 15:42:22 +0000
From: Biju Das <biju.das.jz@...renesas.com>
To: Sergei Shtylyov <sergei.shtylyov@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
CC: Geert Uytterhoeven <geert+renesas@...der.be>,
Sergey Shtylyov <s.shtylyov@...russia.ru>,
Adam Ford <aford173@...il.com>, Andrew Lunn <andrew@...n.ch>,
Yuusuke Ashizuka <ashiduka@...itsu.com>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-renesas-soc@...r.kernel.org"
<linux-renesas-soc@...r.kernel.org>,
Chris Paterson <Chris.Paterson2@...esas.com>,
Biju Das <biju.das@...renesas.com>,
Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: RE: [PATCH net-next 12/18] ravb: Factorise {emac,dmac} init function
Hi Sergei,
Thanks for the feedback.
> <prabhakar.mahadev-lad.rj@...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@...renesas.com>
> > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...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?!
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