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Date: Fri, 20 Aug 2021 21:57:10 +0300
From: Sergey Shtylyov <s.shtylyov@....ru>
To: Biju Das <biju.das.jz@...renesas.com>,
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
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@...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.
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
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