diff mbox series

[net-next,v3,2/9] ravb: Add struct ravb_hw_info to driver data

Message ID 20210818190800.20191-3-biju.das.jz@bp.renesas.com (mailing list archive)
State Accepted
Commit ebb091461a9e146f8afd750cb7eddc5b4c8d47be
Delegated to: Netdev Maintainers
Headers show
Series Add Gigabit Ethernet driver support | expand

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Commit Message

Biju Das Aug. 18, 2021, 7:07 p.m. UTC 
The DMAC and EMAC blocks of Gigabit Ethernet IP found on RZ/G2L SoC are
similar to the R-Car Ethernet AVB IP. With a few changes in the driver we
can support both IPs.

This patch adds the struct ravb_hw_info to hold hw features, driver data
and function pointers to support both the IPs. It also replaces the driver
data chip type with struct ravb_hw_info by moving chip type to it.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
v2->v3:
 * Retained Rb tag from Andrew, since there is no functionality change
   apart from just splitting the patch into 2. Also updated the commit
   description.
v2:
 * Incorporated Andrew and Sergei's review comments for making it smaller patch
   and provided detailed description.
---
 drivers/net/ethernet/renesas/ravb.h      |  6 ++++
 drivers/net/ethernet/renesas/ravb_main.c | 35 +++++++++++++++---------
 2 files changed, 28 insertions(+), 13 deletions(-)

Comments

Sergey Shtylyov Aug. 19, 2021, 4:19 p.m. UTC | #1 
On 8/18/21 10:07 PM, Biju Das wrote:

> The DMAC and EMAC blocks of Gigabit Ethernet IP found on RZ/G2L SoC are
> similar to the R-Car Ethernet AVB IP. With a few changes in the driver we
> can support both IPs.
> 
> This patch adds the struct ravb_hw_info to hold hw features, driver data
> and function pointers to support both the IPs. It also replaces the driver
> data chip type with struct ravb_hw_info by moving chip type to it.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
> ---
> v2->v3:
>  * Retained Rb tag from Andrew, since there is no functionality change
>    apart from just splitting the patch into 2. Also updated the commit
>    description.
> v2:
>  * Incorporated Andrew and Sergei's review comments for making it smaller patch
>    and provided detailed description.

[...]
>  static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg)
> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index 94eb9136752d..b6554e5e13af 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
[...]
> @@ -2113,7 +2122,7 @@ static int ravb_probe(struct platform_device *pdev)
>  		}
>  	}
>  
> -	priv->chip_id = chip_id;
> +	priv->chip_id = info->chip_id;

   Do we still need priv->chip_id?

>  	priv->clk = devm_clk_get(&pdev->dev, NULL);
>  	if (IS_ERR(priv->clk)) {
[...]

Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>

[...]

MBR, Sergey
Biju Das Aug. 19, 2021, 5:33 p.m. UTC | #2 
Hi Sergei,

> Subject: Re: [PATCH net-next v3 2/9] ravb: Add struct ravb_hw_info to
> driver data
> 
> On 8/18/21 10:07 PM, Biju Das wrote:
> 
> > The DMAC and EMAC blocks of Gigabit Ethernet IP found on RZ/G2L SoC
> > are similar to the R-Car Ethernet AVB IP. With a few changes in the
> > driver we can support both IPs.
> >
> > This patch adds the struct ravb_hw_info to hold hw features, driver
> > data and function pointers to support both the IPs. It also replaces
> > the driver data chip type with struct ravb_hw_info by moving chip type
> to it.
> >
> > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > Reviewed-by: Andrew Lunn <andrew@lunn.ch>
> > ---
> > v2->v3:
> >  * Retained Rb tag from Andrew, since there is no functionality change
> >    apart from just splitting the patch into 2. Also updated the commit
> >    description.
> > v2:
> >  * Incorporated Andrew and Sergei's review comments for making it
> smaller patch
> >    and provided detailed description.
> 
> [...]
> >  static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg
> > reg) diff --git a/drivers/net/ethernet/renesas/ravb_main.c
> > b/drivers/net/ethernet/renesas/ravb_main.c
> > index 94eb9136752d..b6554e5e13af 100644
> > --- a/drivers/net/ethernet/renesas/ravb_main.c
> > +++ b/drivers/net/ethernet/renesas/ravb_main.c
> [...]
> > @@ -2113,7 +2122,7 @@ static int ravb_probe(struct platform_device
> *pdev)
> >  		}
> >  	}
> >
> > -	priv->chip_id = chip_id;
> > +	priv->chip_id = info->chip_id;
> 
>    Do we still need priv->chip_id?

The patch currently merged is preparation patch, subsequent patch will replace
all the chip_id in ravb_main with hardware features and driver features.
After that both priv->chip_id and info_chipid is not required for ravb_main.c

However ptp driver[1] still uses it, by adding a feature bit we can replace
that as well. So going forward, there won't be any priv->chip_id or info->chip_id.

Does it makes sense?

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/ethernet/renesas/ravb_ptp.c?h=v5.14-rc6#n200

Regards,
Biju

> 
> >  	priv->clk = devm_clk_get(&pdev->dev, NULL);
> >  	if (IS_ERR(priv->clk)) {
> [...]
> 
> Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
> 
> [...]
> 
> MBR, Sergey
Sergey Shtylyov Aug. 20, 2021, 6:15 p.m. UTC | #3 
On 8/19/21 8:33 PM, Biju Das wrote:

[...]
>>> The DMAC and EMAC blocks of Gigabit Ethernet IP found on RZ/G2L SoC
>>> are similar to the R-Car Ethernet AVB IP. With a few changes in the
>>> driver we can support both IPs.
>>>
>>> This patch adds the struct ravb_hw_info to hold hw features, driver
>>> data and function pointers to support both the IPs. It also replaces
>>> the driver data chip type with struct ravb_hw_info by moving chip type
>> to it.
>>>
>>> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
>>> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>>> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
[...]
>>> reg) diff --git a/drivers/net/ethernet/renesas/ravb_main.c
>>> b/drivers/net/ethernet/renesas/ravb_main.c
>>> index 94eb9136752d..b6554e5e13af 100644
>>> --- a/drivers/net/ethernet/renesas/ravb_main.c
>>> +++ b/drivers/net/ethernet/renesas/ravb_main.c
>> [...]
>>> @@ -2113,7 +2122,7 @@ static int ravb_probe(struct platform_device
>> *pdev)
>>>  		}
>>>  	}
>>>
>>> -	priv->chip_id = chip_id;
>>> +	priv->chip_id = info->chip_id;
>>
>>    Do we still need priv->chip_id?
> 
> The patch currently merged is preparation patch, subsequent patch will replace
> all the chip_id in ravb_main with hardware features and driver features.
> After that both priv->chip_id and info_chipid is not required for ravb_main.c
> 
> However ptp driver[1] still uses it, by adding a feature bit we can replace
> that as well. So going forward, there won't be any priv->chip_id or info->chip_id.
> 
> Does it makes sense?
> 
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/ethernet/renesas/ravb_ptp.c?h=v5.14-rc6#n200

   OK, seems sane, go ahead. :-)

> 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 85ece16134c9..6ff0b2626708 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -988,6 +988,10 @@  enum ravb_chip_id {
 	RCAR_GEN3,
 };
 
+struct ravb_hw_info {
+	enum ravb_chip_id chip_id;
+};
+
 struct ravb_private {
 	struct net_device *ndev;
 	struct platform_device *pdev;
@@ -1040,6 +1044,8 @@  struct ravb_private {
 	unsigned txcidm:1;		/* TX Clock Internal Delay Mode */
 	unsigned rgmii_override:1;	/* Deprecated rgmii-*id behavior */
 	unsigned int num_tx_desc;	/* TX descriptors per packet */
+
+	const struct ravb_hw_info *info;
 };
 
 static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 94eb9136752d..b6554e5e13af 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1924,12 +1924,20 @@  static int ravb_mdio_release(struct ravb_private *priv)
 	return 0;
 }
 
+static const struct ravb_hw_info ravb_gen3_hw_info = {
+	.chip_id = RCAR_GEN3,
+};
+
+static const struct ravb_hw_info ravb_gen2_hw_info = {
+	.chip_id = RCAR_GEN2,
+};
+
 static const struct of_device_id ravb_match_table[] = {
-	{ .compatible = "renesas,etheravb-r8a7790", .data = (void *)RCAR_GEN2 },
-	{ .compatible = "renesas,etheravb-r8a7794", .data = (void *)RCAR_GEN2 },
-	{ .compatible = "renesas,etheravb-rcar-gen2", .data = (void *)RCAR_GEN2 },
-	{ .compatible = "renesas,etheravb-r8a7795", .data = (void *)RCAR_GEN3 },
-	{ .compatible = "renesas,etheravb-rcar-gen3", .data = (void *)RCAR_GEN3 },
+	{ .compatible = "renesas,etheravb-r8a7790", .data = &ravb_gen2_hw_info },
+	{ .compatible = "renesas,etheravb-r8a7794", .data = &ravb_gen2_hw_info },
+	{ .compatible = "renesas,etheravb-rcar-gen2", .data = &ravb_gen2_hw_info },
+	{ .compatible = "renesas,etheravb-r8a7795", .data = &ravb_gen3_hw_info },
+	{ .compatible = "renesas,etheravb-rcar-gen3", .data = &ravb_gen3_hw_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ravb_match_table);
@@ -2023,8 +2031,8 @@  static void ravb_set_delay_mode(struct net_device *ndev)
 static int ravb_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
+	const struct ravb_hw_info *info;
 	struct ravb_private *priv;
-	enum ravb_chip_id chip_id;
 	struct net_device *ndev;
 	int error, irq, q;
 	struct resource *res;
@@ -2047,9 +2055,9 @@  static int ravb_probe(struct platform_device *pdev)
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_get_sync(&pdev->dev);
 
-	chip_id = (enum ravb_chip_id)of_device_get_match_data(&pdev->dev);
+	info = of_device_get_match_data(&pdev->dev);
 
-	if (chip_id == RCAR_GEN3)
+	if (info->chip_id == RCAR_GEN3)
 		irq = platform_get_irq_byname(pdev, "ch22");
 	else
 		irq = platform_get_irq(pdev, 0);
@@ -2062,6 +2070,7 @@  static int ravb_probe(struct platform_device *pdev)
 	SET_NETDEV_DEV(ndev, &pdev->dev);
 
 	priv = netdev_priv(ndev);
+	priv->info = info;
 	priv->ndev = ndev;
 	priv->pdev = pdev;
 	priv->num_tx_ring[RAVB_BE] = BE_TX_RING_SIZE;
@@ -2088,7 +2097,7 @@  static int ravb_probe(struct platform_device *pdev)
 	priv->avb_link_active_low =
 		of_property_read_bool(np, "renesas,ether-link-active-low");
 
-	if (chip_id == RCAR_GEN3) {
+	if (info->chip_id == RCAR_GEN3) {
 		irq = platform_get_irq_byname(pdev, "ch24");
 		if (irq < 0) {
 			error = irq;
@@ -2113,7 +2122,7 @@  static int ravb_probe(struct platform_device *pdev)
 		}
 	}
 
-	priv->chip_id = chip_id;
+	priv->chip_id = info->chip_id;
 
 	priv->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(priv->clk)) {
@@ -2131,7 +2140,7 @@  static int ravb_probe(struct platform_device *pdev)
 	ndev->max_mtu = 2048 - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
 	ndev->min_mtu = ETH_MIN_MTU;
 
-	priv->num_tx_desc = chip_id == RCAR_GEN2 ?
+	priv->num_tx_desc = info->chip_id == RCAR_GEN2 ?
 		NUM_TX_DESC_GEN2 : NUM_TX_DESC_GEN3;
 
 	/* Set function */
@@ -2173,7 +2182,7 @@  static int ravb_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&priv->ts_skb_list);
 
 	/* Initialise PTP Clock driver */
-	if (chip_id != RCAR_GEN2)
+	if (info->chip_id != RCAR_GEN2)
 		ravb_ptp_init(ndev, pdev);
 
 	/* Debug message level */
@@ -2221,7 +2230,7 @@  static int ravb_probe(struct platform_device *pdev)
 			  priv->desc_bat_dma);
 
 	/* Stop PTP Clock driver */
-	if (chip_id != RCAR_GEN2)
+	if (info->chip_id != RCAR_GEN2)
 		ravb_ptp_stop(ndev);
 out_disable_refclk:
 	clk_disable_unprepare(priv->refclk);