diff mbox series

[v3,net-next,5/6] net: ethernet: ti: am65-cpsw: retain PORT_VLAN_REG after suspend/resume

Message ID 20221123124835.18937-6-rogerq@kernel.org
State New
Headers
Series net: ethernet: ti: am65-cpsw: Fix set channel operation |

Commit Message

Roger Quadros Nov. 23, 2022, 12:48 p.m. UTC 
  During suspend resume the context of PORT_VLAN_REG is lost so
save it during suspend and restore it during resume for
host port and slave ports.

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/ti/am65-cpsw-nuss.c | 7 +++++++
 drivers/net/ethernet/ti/am65-cpsw-nuss.h | 4 ++++
 2 files changed, 11 insertions(+)

Comments

Maciej Fijalkowski Nov. 25, 2022, 1:21 p.m. UTC | #1 
On Wed, Nov 23, 2022 at 02:48:34PM +0200, Roger Quadros wrote:
> During suspend resume the context of PORT_VLAN_REG is lost so
> save it during suspend and restore it during resume for
> host port and slave ports.
> 
> Signed-off-by: Roger Quadros <rogerq@kernel.org>
> Signed-off-by: David S. Miller <davem@davemloft.net>
> ---
>  drivers/net/ethernet/ti/am65-cpsw-nuss.c | 7 +++++++
>  drivers/net/ethernet/ti/am65-cpsw-nuss.h | 4 ++++
>  2 files changed, 11 insertions(+)
> 
> diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
> index 0b59088e3728..f5357afde527 100644
> --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
> +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
> @@ -2875,7 +2875,9 @@ static int am65_cpsw_nuss_suspend(struct device *dev)
>  	struct am65_cpsw_port *port;
>  	struct net_device *ndev;
>  	int i, ret;
> +	struct am65_cpsw_host *host_p = am65_common_get_host(common);

Nit: I see that retrieving host pointer depends on getting the common
pointer first from dev_get_drvdata(dev) so pure RCT is not possible to
maintain here but nonetheless I would move this line just below the common
pointer:

	struct am65_cpsw_common *common = dev_get_drvdata(dev);
	struct am65_cpsw_host *host = am65_common_get_host(common);
	struct am65_cpsw_port *port;
	struct net_device *ndev;
	int i, ret;

Also I think plain 'host' for variable name is just fine, no need for _p
suffix to indicate it is a pointer. in that case you should go with
common_p etc.

>  
> +	host_p->vid_context = readl(host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
>  	for (i = 0; i < common->port_num; i++) {
>  		port = &common->ports[i];
>  		ndev = port->ndev;
> @@ -2883,6 +2885,7 @@ static int am65_cpsw_nuss_suspend(struct device *dev)
>  		if (!ndev)
>  			continue;
>  
> +		port->vid_context = readl(port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
>  		netif_device_detach(ndev);
>  		if (netif_running(ndev)) {
>  			rtnl_lock();
> @@ -2909,6 +2912,7 @@ static int am65_cpsw_nuss_resume(struct device *dev)
>  	struct am65_cpsw_port *port;
>  	struct net_device *ndev;
>  	int i, ret;
> +	struct am65_cpsw_host *host_p = am65_common_get_host(common);
>  
>  	ret = am65_cpsw_nuss_init_tx_chns(common);
>  	if (ret)
> @@ -2941,8 +2945,11 @@ static int am65_cpsw_nuss_resume(struct device *dev)
>  		}
>  
>  		netif_device_attach(ndev);
> +		writel(port->vid_context, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
>  	}
>  
> +	writel(host_p->vid_context, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
> +
>  	return 0;
>  }
>  #endif /* CONFIG_PM_SLEEP */
> diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.h b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
> index 2c9850fdfcb6..e95cc37a7286 100644
> --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.h
> +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
> @@ -55,12 +55,16 @@ struct am65_cpsw_port {
>  	bool				rx_ts_enabled;
>  	struct am65_cpsw_qos		qos;
>  	struct devlink_port		devlink_port;
> +	/* Only for suspend resume context */
> +	u32				vid_context;
>  };
>  
>  struct am65_cpsw_host {
>  	struct am65_cpsw_common		*common;
>  	void __iomem			*port_base;
>  	void __iomem			*stat_base;
> +	/* Only for suspend resume context */
> +	u32				vid_context;
>  };
>  
>  struct am65_cpsw_tx_chn {
> -- 
> 2.17.1
>
Roger Quadros Nov. 28, 2022, 9:21 a.m. UTC | #2 
On 25/11/2022 15:21, Maciej Fijalkowski wrote:
> On Wed, Nov 23, 2022 at 02:48:34PM +0200, Roger Quadros wrote:
>> During suspend resume the context of PORT_VLAN_REG is lost so
>> save it during suspend and restore it during resume for
>> host port and slave ports.
>>
>> Signed-off-by: Roger Quadros <rogerq@kernel.org>
>> Signed-off-by: David S. Miller <davem@davemloft.net>
>> ---
>>  drivers/net/ethernet/ti/am65-cpsw-nuss.c | 7 +++++++
>>  drivers/net/ethernet/ti/am65-cpsw-nuss.h | 4 ++++
>>  2 files changed, 11 insertions(+)
>>
>> diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
>> index 0b59088e3728..f5357afde527 100644
>> --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
>> +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
>> @@ -2875,7 +2875,9 @@ static int am65_cpsw_nuss_suspend(struct device *dev)
>>  	struct am65_cpsw_port *port;
>>  	struct net_device *ndev;
>>  	int i, ret;
>> +	struct am65_cpsw_host *host_p = am65_common_get_host(common);
> 
> Nit: I see that retrieving host pointer depends on getting the common
> pointer first from dev_get_drvdata(dev) so pure RCT is not possible to
> maintain here but nonetheless I would move this line just below the common
> pointer:
> 
> 	struct am65_cpsw_common *common = dev_get_drvdata(dev);
> 	struct am65_cpsw_host *host = am65_common_get_host(common);
> 	struct am65_cpsw_port *port;
> 	struct net_device *ndev;
> 	int i, ret;

OK.

> 
> Also I think plain 'host' for variable name is just fine, no need for _p
> suffix to indicate it is a pointer. in that case you should go with
> common_p etc.

host_p is the naming convention used throughout the driver.
Do think it is a good idea to change it at this one place?

> 
>>  
>> +	host_p->vid_context = readl(host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
>>  	for (i = 0; i < common->port_num; i++) {
>>  		port = &common->ports[i];
>>  		ndev = port->ndev;
>> @@ -2883,6 +2885,7 @@ static int am65_cpsw_nuss_suspend(struct device *dev)
>>  		if (!ndev)
>>  			continue;
>>  
>> +		port->vid_context = readl(port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
>>  		netif_device_detach(ndev);
>>  		if (netif_running(ndev)) {
>>  			rtnl_lock();
>> @@ -2909,6 +2912,7 @@ static int am65_cpsw_nuss_resume(struct device *dev)
>>  	struct am65_cpsw_port *port;
>>  	struct net_device *ndev;
>>  	int i, ret;
>> +	struct am65_cpsw_host *host_p = am65_common_get_host(common);
>>  
>>  	ret = am65_cpsw_nuss_init_tx_chns(common);
>>  	if (ret)
>> @@ -2941,8 +2945,11 @@ static int am65_cpsw_nuss_resume(struct device *dev)
>>  		}
>>  
>>  		netif_device_attach(ndev);
>> +		writel(port->vid_context, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
>>  	}
>>  
>> +	writel(host_p->vid_context, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
>> +
>>  	return 0;
>>  }
>>  #endif /* CONFIG_PM_SLEEP */
>> diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.h b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
>> index 2c9850fdfcb6..e95cc37a7286 100644
>> --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.h
>> +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
>> @@ -55,12 +55,16 @@ struct am65_cpsw_port {
>>  	bool				rx_ts_enabled;
>>  	struct am65_cpsw_qos		qos;
>>  	struct devlink_port		devlink_port;
>> +	/* Only for suspend resume context */
>> +	u32				vid_context;
>>  };
>>  
>>  struct am65_cpsw_host {
>>  	struct am65_cpsw_common		*common;
>>  	void __iomem			*port_base;
>>  	void __iomem			*stat_base;
>> +	/* Only for suspend resume context */
>> +	u32				vid_context;
>>  };
>>  
>>  struct am65_cpsw_tx_chn {
>> -- 
>> 2.17.1
>>

--
cheers,
-roger
Maciej Fijalkowski Nov. 28, 2022, 10:11 a.m. UTC | #3 
On Mon, Nov 28, 2022 at 11:21:40AM +0200, Roger Quadros wrote:
> On 25/11/2022 15:21, Maciej Fijalkowski wrote:
> > On Wed, Nov 23, 2022 at 02:48:34PM +0200, Roger Quadros wrote:
> >> During suspend resume the context of PORT_VLAN_REG is lost so
> >> save it during suspend and restore it during resume for
> >> host port and slave ports.
> >>
> >> Signed-off-by: Roger Quadros <rogerq@kernel.org>
> >> Signed-off-by: David S. Miller <davem@davemloft.net>
> >> ---
> >>  drivers/net/ethernet/ti/am65-cpsw-nuss.c | 7 +++++++
> >>  drivers/net/ethernet/ti/am65-cpsw-nuss.h | 4 ++++
> >>  2 files changed, 11 insertions(+)
> >>
> >> diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
> >> index 0b59088e3728..f5357afde527 100644
> >> --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
> >> +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
> >> @@ -2875,7 +2875,9 @@ static int am65_cpsw_nuss_suspend(struct device *dev)
> >>  	struct am65_cpsw_port *port;
> >>  	struct net_device *ndev;
> >>  	int i, ret;
> >> +	struct am65_cpsw_host *host_p = am65_common_get_host(common);
> > 
> > Nit: I see that retrieving host pointer depends on getting the common
> > pointer first from dev_get_drvdata(dev) so pure RCT is not possible to
> > maintain here but nonetheless I would move this line just below the common
> > pointer:
> > 
> > 	struct am65_cpsw_common *common = dev_get_drvdata(dev);
> > 	struct am65_cpsw_host *host = am65_common_get_host(common);
> > 	struct am65_cpsw_port *port;
> > 	struct net_device *ndev;
> > 	int i, ret;
> 
> OK.
> 
> > 
> > Also I think plain 'host' for variable name is just fine, no need for _p
> > suffix to indicate it is a pointer. in that case you should go with
> > common_p etc.
> 
> host_p is the naming convention used throughout the driver.
> Do think it is a good idea to change it at this one place?

No, maybe think of a refactor throughout whole codebase, changing it in a
single place would be odd.

> 
> > 
> >>  
> >> +	host_p->vid_context = readl(host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
> >>  	for (i = 0; i < common->port_num; i++) {
> >>  		port = &common->ports[i];
> >>  		ndev = port->ndev;
> >> @@ -2883,6 +2885,7 @@ static int am65_cpsw_nuss_suspend(struct device *dev)
> >>  		if (!ndev)
> >>  			continue;
> >>  
> >> +		port->vid_context = readl(port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
> >>  		netif_device_detach(ndev);
> >>  		if (netif_running(ndev)) {
> >>  			rtnl_lock();
> >> @@ -2909,6 +2912,7 @@ static int am65_cpsw_nuss_resume(struct device *dev)
> >>  	struct am65_cpsw_port *port;
> >>  	struct net_device *ndev;
> >>  	int i, ret;
> >> +	struct am65_cpsw_host *host_p = am65_common_get_host(common);
> >>  
> >>  	ret = am65_cpsw_nuss_init_tx_chns(common);
> >>  	if (ret)
> >> @@ -2941,8 +2945,11 @@ static int am65_cpsw_nuss_resume(struct device *dev)
> >>  		}
> >>  
> >>  		netif_device_attach(ndev);
> >> +		writel(port->vid_context, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
> >>  	}
> >>  
> >> +	writel(host_p->vid_context, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
> >> +
> >>  	return 0;
> >>  }
> >>  #endif /* CONFIG_PM_SLEEP */
> >> diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.h b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
> >> index 2c9850fdfcb6..e95cc37a7286 100644
> >> --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.h
> >> +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
> >> @@ -55,12 +55,16 @@ struct am65_cpsw_port {
> >>  	bool				rx_ts_enabled;
> >>  	struct am65_cpsw_qos		qos;
> >>  	struct devlink_port		devlink_port;
> >> +	/* Only for suspend resume context */
> >> +	u32				vid_context;
> >>  };
> >>  
> >>  struct am65_cpsw_host {
> >>  	struct am65_cpsw_common		*common;
> >>  	void __iomem			*port_base;
> >>  	void __iomem			*stat_base;
> >> +	/* Only for suspend resume context */
> >> +	u32				vid_context;
> >>  };
> >>  
> >>  struct am65_cpsw_tx_chn {
> >> -- 
> >> 2.17.1
> >>
> 
> --
> cheers,
> -roger
diff mbox series

Patch

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index 0b59088e3728..f5357afde527 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -2875,7 +2875,9 @@  static int am65_cpsw_nuss_suspend(struct device *dev)
 	struct am65_cpsw_port *port;
 	struct net_device *ndev;
 	int i, ret;
+	struct am65_cpsw_host *host_p = am65_common_get_host(common);
 
+	host_p->vid_context = readl(host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
 	for (i = 0; i < common->port_num; i++) {
 		port = &common->ports[i];
 		ndev = port->ndev;
@@ -2883,6 +2885,7 @@  static int am65_cpsw_nuss_suspend(struct device *dev)
 		if (!ndev)
 			continue;
 
+		port->vid_context = readl(port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
 		netif_device_detach(ndev);
 		if (netif_running(ndev)) {
 			rtnl_lock();
@@ -2909,6 +2912,7 @@  static int am65_cpsw_nuss_resume(struct device *dev)
 	struct am65_cpsw_port *port;
 	struct net_device *ndev;
 	int i, ret;
+	struct am65_cpsw_host *host_p = am65_common_get_host(common);
 
 	ret = am65_cpsw_nuss_init_tx_chns(common);
 	if (ret)
@@ -2941,8 +2945,11 @@  static int am65_cpsw_nuss_resume(struct device *dev)
 		}
 
 		netif_device_attach(ndev);
+		writel(port->vid_context, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
 	}
 
+	writel(host_p->vid_context, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
+
 	return 0;
 }
 #endif /* CONFIG_PM_SLEEP */
diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.h b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
index 2c9850fdfcb6..e95cc37a7286 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.h
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
@@ -55,12 +55,16 @@  struct am65_cpsw_port {
 	bool				rx_ts_enabled;
 	struct am65_cpsw_qos		qos;
 	struct devlink_port		devlink_port;
+	/* Only for suspend resume context */
+	u32				vid_context;
 };
 
 struct am65_cpsw_host {
 	struct am65_cpsw_common		*common;
 	void __iomem			*port_base;
 	void __iomem			*stat_base;
+	/* Only for suspend resume context */
+	u32				vid_context;
 };
 
 struct am65_cpsw_tx_chn {