* [PATCHv3] Fixed PHY: Add fixed_phy_change_carrier()
@ 2018-12-13 17:47 Joakim Tjernlund
2018-12-13 18:48 ` Florian Fainelli
0 siblings, 1 reply; 3+ messages in thread
From: Joakim Tjernlund @ 2018-12-13 17:47 UTC (permalink / raw)
To: netdev @ vger . kernel . org, Florian Fainelli, Andrew Lunn,
claudiu . manoil @ nxp . com
Cc: Joakim Tjernlund
Drivers can use this as .ndo_change_carrier() to change carrier
via /sys/class/net/ethX/carrier.
Signed-off-by: Joakim Tjernlund <joakim.tjernlund@infinera.com>
---
v3 - Moved the logic into fixed PHY to minimize eth driver
impact
v2 - Only allow carrier changes for Fixed PHYs
I will follow up with drivers using this next.
drivers/net/phy/fixed_phy.c | 23 ++++++++++++++++++++++-
include/linux/phy_fixed.h | 5 +++++
2 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
index eb5167210681..aedebc251997 100644
--- a/drivers/net/phy/fixed_phy.c
+++ b/drivers/net/phy/fixed_phy.c
@@ -25,6 +25,7 @@
#include <linux/gpio.h>
#include <linux/seqlock.h>
#include <linux/idr.h>
+#include <linux/netdevice.h>
#include "swphy.h"
@@ -38,6 +39,7 @@ struct fixed_phy {
struct phy_device *phydev;
seqcount_t seqcount;
struct fixed_phy_status status;
+ bool no_carrier;
int (*link_update)(struct net_device *, struct fixed_phy_status *);
struct list_head node;
int link_gpio;
@@ -48,9 +50,27 @@ static struct fixed_mdio_bus platform_fmb = {
.phys = LIST_HEAD_INIT(platform_fmb.phys),
};
+int
+fixed_phy_change_carrier(struct net_device *dev, bool new_carrier)
+{
+ struct fixed_mdio_bus *fmb = &platform_fmb;
+ struct phy_device *phydev = dev->phydev;
+ struct fixed_phy *fp;
+
+ if (!phydev || !phydev->mdio.bus)
+ return -EINVAL;
+
+ list_for_each_entry(fp, &fmb->phys, node) {
+ if (fp->addr == phydev->mdio.addr) {
+ fp->no_carrier = !new_carrier;
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
static void fixed_phy_update(struct fixed_phy *fp)
{
- if (gpio_is_valid(fp->link_gpio))
+ if (!fp->no_carrier && gpio_is_valid(fp->link_gpio))
fp->status.link = !!gpio_get_value_cansleep(fp->link_gpio);
}
@@ -66,6 +86,7 @@ static int fixed_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num)
do {
s = read_seqcount_begin(&fp->seqcount);
+ fp->status.link = !fp->no_carrier;
/* Issue callback if user registered it. */
if (fp->link_update) {
fp->link_update(fp->phydev->attached_dev,
diff --git a/include/linux/phy_fixed.h b/include/linux/phy_fixed.h
index cf6392de6eb0..a711b41f3e20 100644
--- a/include/linux/phy_fixed.h
+++ b/include/linux/phy_fixed.h
@@ -13,6 +13,7 @@ struct fixed_phy_status {
struct device_node;
#if IS_ENABLED(CONFIG_FIXED_PHY)
+extern int fixed_phy_change_carrier(struct net_device *dev, bool new_carrier);
extern int fixed_phy_add(unsigned int irq, int phy_id,
struct fixed_phy_status *status,
int link_gpio);
@@ -56,6 +57,10 @@ static inline int fixed_phy_update_state(struct phy_device *phydev,
{
return -ENODEV;
}
+static inline int fixed_phy_change_carrier(struct net_device *dev, bool new_carrier)
+{
+ return -EINVAL;
+}
#endif /* CONFIG_FIXED_PHY */
#endif /* __PHY_FIXED_H */
--
2.18.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCHv3] Fixed PHY: Add fixed_phy_change_carrier()
2018-12-13 17:47 [PATCHv3] Fixed PHY: Add fixed_phy_change_carrier() Joakim Tjernlund
@ 2018-12-13 18:48 ` Florian Fainelli
2018-12-14 8:05 ` Joakim Tjernlund
0 siblings, 1 reply; 3+ messages in thread
From: Florian Fainelli @ 2018-12-13 18:48 UTC (permalink / raw)
To: Joakim Tjernlund, netdev @ vger . kernel . org, Andrew Lunn,
claudiu . manoil @ nxp . com
Le 12/13/18 à 9:47 AM, Joakim Tjernlund a écrit :
> Drivers can use this as .ndo_change_carrier() to change carrier
> via /sys/class/net/ethX/carrier.
>
> Signed-off-by: Joakim Tjernlund <joakim.tjernlund@infinera.com>
Other than a few
> ---
>
> v3 - Moved the logic into fixed PHY to minimize eth driver
> impact
>
> v2 - Only allow carrier changes for Fixed PHYs
>
> I will follow up with drivers using this next.
You might as well post them as a patch series that way we can review the
function and its user(s) in one go. Few nitpicks below, but looking good
otherwise.
>
> drivers/net/phy/fixed_phy.c | 23 ++++++++++++++++++++++-
> include/linux/phy_fixed.h | 5 +++++
> 2 files changed, 27 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
> index eb5167210681..aedebc251997 100644
> --- a/drivers/net/phy/fixed_phy.c
> +++ b/drivers/net/phy/fixed_phy.c
> @@ -25,6 +25,7 @@
> #include <linux/gpio.h>
> #include <linux/seqlock.h>
> #include <linux/idr.h>
> +#include <linux/netdevice.h>
>
> #include "swphy.h"
>
> @@ -38,6 +39,7 @@ struct fixed_phy {
> struct phy_device *phydev;
> seqcount_t seqcount;
> struct fixed_phy_status status;
> + bool no_carrier;
Any reason why this is used with negative logic instead of positive
logic and calling that just "carrier"?
> int (*link_update)(struct net_device *, struct fixed_phy_status *);
> struct list_head node;
> int link_gpio;
> @@ -48,9 +50,27 @@ static struct fixed_mdio_bus platform_fmb = {
> .phys = LIST_HEAD_INIT(platform_fmb.phys),
> };
>
> +int
> +fixed_phy_change_carrier(struct net_device *dev, bool new_carrier)
Can you put the return type and function name on the same line?
> +{
> + struct fixed_mdio_bus *fmb = &platform_fmb;
> + struct phy_device *phydev = dev->phydev;
> + struct fixed_phy *fp;
> +
> + if (!phydev || !phydev->mdio.bus)
> + return -EINVAL;
> +
> + list_for_each_entry(fp, &fmb->phys, node) {
> + if (fp->addr == phydev->mdio.addr) {
> + fp->no_carrier = !new_carrier;
> + return 0;
> + }
> + }
> + return -EINVAL;
> +}
Missing newline and EXPORT_SYMBOL_GPL() here to make that visible to
modules.
> static void fixed_phy_update(struct fixed_phy *fp)
> {
> - if (gpio_is_valid(fp->link_gpio))
> + if (!fp->no_carrier && gpio_is_valid(fp->link_gpio))
> fp->status.link = !!gpio_get_value_cansleep(fp->link_gpio);
> }
>
> @@ -66,6 +86,7 @@ static int fixed_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num)
>
> do {
> s = read_seqcount_begin(&fp->seqcount);
> + fp->status.link = !fp->no_carrier;
> /* Issue callback if user registered it. */
> if (fp->link_update) {
> fp->link_update(fp->phydev->attached_dev,
> diff --git a/include/linux/phy_fixed.h b/include/linux/phy_fixed.h
> index cf6392de6eb0..a711b41f3e20 100644
> --- a/include/linux/phy_fixed.h
> +++ b/include/linux/phy_fixed.h
> @@ -13,6 +13,7 @@ struct fixed_phy_status {
> struct device_node;
>
> #if IS_ENABLED(CONFIG_FIXED_PHY)
> +extern int fixed_phy_change_carrier(struct net_device *dev, bool new_carrier);
> extern int fixed_phy_add(unsigned int irq, int phy_id,
> struct fixed_phy_status *status,
> int link_gpio);
> @@ -56,6 +57,10 @@ static inline int fixed_phy_update_state(struct phy_device *phydev,
> {
> return -ENODEV;
> }
> +static inline int fixed_phy_change_carrier(struct net_device *dev, bool new_carrier)
> +{
> + return -EINVAL;
> +}
> #endif /* CONFIG_FIXED_PHY */
>
> #endif /* __PHY_FIXED_H */
>
--
Florian
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCHv3] Fixed PHY: Add fixed_phy_change_carrier()
2018-12-13 18:48 ` Florian Fainelli
@ 2018-12-14 8:05 ` Joakim Tjernlund
0 siblings, 0 replies; 3+ messages in thread
From: Joakim Tjernlund @ 2018-12-14 8:05 UTC (permalink / raw)
To: claudiu.manoil, netdev, f.fainelli, andrew
On Thu, 2018-12-13 at 10:48 -0800, Florian Fainelli wrote:
> CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.
>
>
> Le 12/13/18 à 9:47 AM, Joakim Tjernlund a écrit :
> > Drivers can use this as .ndo_change_carrier() to change carrier
> > via /sys/class/net/ethX/carrier.
> >
> > Signed-off-by: Joakim Tjernlund <joakim.tjernlund@infinera.com>
>
> Other than a few
>
> > ---
> >
> > v3 - Moved the logic into fixed PHY to minimize eth driver
> > impact
> >
> > v2 - Only allow carrier changes for Fixed PHYs
> >
> > I will follow up with drivers using this next.
>
> You might as well post them as a patch series that way we can review the
> function and its user(s) in one go. Few nitpicks below, but looking good
> otherwise.
OK, will do.
>
> > drivers/net/phy/fixed_phy.c | 23 ++++++++++++++++++++++-
> > include/linux/phy_fixed.h | 5 +++++
> > 2 files changed, 27 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
> > index eb5167210681..aedebc251997 100644
> > --- a/drivers/net/phy/fixed_phy.c
> > +++ b/drivers/net/phy/fixed_phy.c
> > @@ -25,6 +25,7 @@
> > #include <linux/gpio.h>
> > #include <linux/seqlock.h>
> > #include <linux/idr.h>
> > +#include <linux/netdevice.h>
> >
> > #include "swphy.h"
> >
> > @@ -38,6 +39,7 @@ struct fixed_phy {
> > struct phy_device *phydev;
> > seqcount_t seqcount;
> > struct fixed_phy_status status;
> > + bool no_carrier;
>
> Any reason why this is used with negative logic instead of positive
> logic and calling that just "carrier"?
Yes, both because I like no_carrier better and because 0 as default does not
require explicit initialization. Are you good with that ?
>
> > int (*link_update)(struct net_device *, struct fixed_phy_status *);
> > struct list_head node;
> > int link_gpio;
> > @@ -48,9 +50,27 @@ static struct fixed_mdio_bus platform_fmb = {
> > .phys = LIST_HEAD_INIT(platform_fmb.phys),
> > };
> >
> > +int
> > +fixed_phy_change_carrier(struct net_device *dev, bool new_carrier)
>
> Can you put the return type and function name on the same line?
Done.
>
> > +{
> > + struct fixed_mdio_bus *fmb = &platform_fmb;
> > + struct phy_device *phydev = dev->phydev;
> > + struct fixed_phy *fp;
> > +
> > + if (!phydev || !phydev->mdio.bus)
> > + return -EINVAL;
> > +
> > + list_for_each_entry(fp, &fmb->phys, node) {
> > + if (fp->addr == phydev->mdio.addr) {
> > + fp->no_carrier = !new_carrier;
> > + return 0;
> > + }
> > + }
> > + return -EINVAL;
> > +}
>
> Missing newline and EXPORT_SYMBOL_GPL() here to make that visible to
> modules.
Done.
>
> > static void fixed_phy_update(struct fixed_phy *fp)
> > {
> > - if (gpio_is_valid(fp->link_gpio))
> > + if (!fp->no_carrier && gpio_is_valid(fp->link_gpio))
> > fp->status.link = !!gpio_get_value_cansleep(fp->link_gpio);
> > }
> >
> > @@ -66,6 +86,7 @@ static int fixed_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num)
> >
> > do {
> > s = read_seqcount_begin(&fp->seqcount);
> > + fp->status.link = !fp->no_carrier;
> > /* Issue callback if user registered it. */
> > if (fp->link_update) {
> > fp->link_update(fp->phydev->attached_dev,
> > diff --git a/include/linux/phy_fixed.h b/include/linux/phy_fixed.h
> > index cf6392de6eb0..a711b41f3e20 100644
> > --- a/include/linux/phy_fixed.h
> > +++ b/include/linux/phy_fixed.h
> > @@ -13,6 +13,7 @@ struct fixed_phy_status {
> > struct device_node;
> >
> > #if IS_ENABLED(CONFIG_FIXED_PHY)
> > +extern int fixed_phy_change_carrier(struct net_device *dev, bool new_carrier);
> > extern int fixed_phy_add(unsigned int irq, int phy_id,
> > struct fixed_phy_status *status,
> > int link_gpio);
> > @@ -56,6 +57,10 @@ static inline int fixed_phy_update_state(struct phy_device *phydev,
> > {
> > return -ENODEV;
> > }
> > +static inline int fixed_phy_change_carrier(struct net_device *dev, bool new_carrier)
> > +{
> > + return -EINVAL;
> > +}
> > #endif /* CONFIG_FIXED_PHY */
> >
> > #endif /* __PHY_FIXED_H */
> >
>
> --
> Florian
^ permalink raw reply [flat|nested] 3+ messages in thread
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2018-12-13 17:47 [PATCHv3] Fixed PHY: Add fixed_phy_change_carrier() Joakim Tjernlund
2018-12-13 18:48 ` Florian Fainelli
2018-12-14 8:05 ` Joakim Tjernlund
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