diff mbox series

[net-next,RFC,6/6] net: phy: bcm7xxx: rework phy_driver table to new multiple PHY ID format

Message ID 20240218190034.15447-7-ansuelsmth@gmail.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series net: phy: support multi PHY in phy_driver Was: net: phy: detach PHY driver OPs from phy_driver struct | expand

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Commit Message

Christian Marangi Feb. 18, 2024, 7 p.m. UTC 
Rework bcm7xxx PHY driver table to new multiple PHY format
implementation to reduce code duplication and final size of the compiled
module.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/net/phy/bcm7xxx.c | 140 ++++++++++++++++++++++----------------
 1 file changed, 82 insertions(+), 58 deletions(-)

Comments

Florian Fainelli Feb. 19, 2024, 4:26 a.m. UTC | #1 
On 2/18/2024 11:00 AM, Christian Marangi wrote:
> Rework bcm7xxx PHY driver table to new multiple PHY format
> implementation to reduce code duplication and final size of the compiled
> module.

I like the idea of sharing as much code as possible and creating a 
smaller module, however by changing the name, you are creating an 
user-space ABI change, we rely upon the exact PHY name being shown under 
/sys/class/mdio_bus/*/* and this change will break that.

Thanks!
Christian Marangi Feb. 19, 2024, 4:41 p.m. UTC | #2 
On Sun, Feb 18, 2024 at 08:26:29PM -0800, Florian Fainelli wrote:
> 
> 
> On 2/18/2024 11:00 AM, Christian Marangi wrote:
> > Rework bcm7xxx PHY driver table to new multiple PHY format
> > implementation to reduce code duplication and final size of the compiled
> > module.
> 
> I like the idea of sharing as much code as possible and creating a smaller
> module, however by changing the name, you are creating an user-space ABI
> change, we rely upon the exact PHY name being shown under
> /sys/class/mdio_bus/*/* and this change will break that.
>

Thanks for putting this concern on the table but isn't that generated by
dev_set_name and PHY_ID_FMT? from bus->id and addr?

Can't find reference of the name entry in sysfs. Am I missing something?
The name seems to be used only by logging to print info/err/warn.
Florian Fainelli Feb. 19, 2024, 8:15 p.m. UTC | #3 
On 2/19/2024 8:41 AM, Christian Marangi wrote:
> On Sun, Feb 18, 2024 at 08:26:29PM -0800, Florian Fainelli wrote:
>>
>>
>> On 2/18/2024 11:00 AM, Christian Marangi wrote:
>>> Rework bcm7xxx PHY driver table to new multiple PHY format
>>> implementation to reduce code duplication and final size of the compiled
>>> module.
>>
>> I like the idea of sharing as much code as possible and creating a smaller
>> module, however by changing the name, you are creating an user-space ABI
>> change, we rely upon the exact PHY name being shown under
>> /sys/class/mdio_bus/*/* and this change will break that.
>>
> 
> Thanks for putting this concern on the table but isn't that generated by
> dev_set_name and PHY_ID_FMT? from bus->id and addr?
> 
> Can't find reference of the name entry in sysfs. Am I missing something?
> The name seems to be used only by logging to print info/err/warn.

The name will appear under /sys/ like this:

ls -ls /sys/class/mdio_bus/unimac-mdio-0/unimac-mdio-0\:01/
total 0
      0 lrwxrwxrwx    1 root     root             0 Jan  4 21:27 
attached_dev -> ../../../../net/eth0
      0 lrwxrwxrwx    1 root     root             0 Jan  4 21:27 driver 
-> ../../../../../../../../bus/mdio_bus/drivers/Broadcom BCM7712

it might be OK to change the driver, but I can tell you this is going to 
be breaking a number of our scripts here...
Christian Marangi Feb. 19, 2024, 10 p.m. UTC | #4 
On Mon, Feb 19, 2024 at 12:15:14PM -0800, Florian Fainelli wrote:
> 
> 
> On 2/19/2024 8:41 AM, Christian Marangi wrote:
> > On Sun, Feb 18, 2024 at 08:26:29PM -0800, Florian Fainelli wrote:
> > > 
> > > 
> > > On 2/18/2024 11:00 AM, Christian Marangi wrote:
> > > > Rework bcm7xxx PHY driver table to new multiple PHY format
> > > > implementation to reduce code duplication and final size of the compiled
> > > > module.
> > > 
> > > I like the idea of sharing as much code as possible and creating a smaller
> > > module, however by changing the name, you are creating an user-space ABI
> > > change, we rely upon the exact PHY name being shown under
> > > /sys/class/mdio_bus/*/* and this change will break that.
> > > 
> > 
> > Thanks for putting this concern on the table but isn't that generated by
> > dev_set_name and PHY_ID_FMT? from bus->id and addr?
> > 
> > Can't find reference of the name entry in sysfs. Am I missing something?
> > The name seems to be used only by logging to print info/err/warn.
> 
> The name will appear under /sys/ like this:
> 
> ls -ls /sys/class/mdio_bus/unimac-mdio-0/unimac-mdio-0\:01/
> total 0
>      0 lrwxrwxrwx    1 root     root             0 Jan  4 21:27 attached_dev
> -> ../../../../net/eth0
>      0 lrwxrwxrwx    1 root     root             0 Jan  4 21:27 driver ->
> ../../../../../../../../bus/mdio_bus/drivers/Broadcom BCM7712
> 
> it might be OK to change the driver, but I can tell you this is going to be
> breaking a number of our scripts here...

Thanks for the command, yes I just notice the problem and yes it's
problematic... Starting to think that the only way to have this cleanup
is to detach ops from the phy_driver struct.

Not fiding a good way to handle the name problem...
diff mbox series

Patch

diff --git a/drivers/net/phy/bcm7xxx.c b/drivers/net/phy/bcm7xxx.c
index 97638ba7ae85..4d886bb8a3e2 100644
--- a/drivers/net/phy/bcm7xxx.c
+++ b/drivers/net/phy/bcm7xxx.c
@@ -845,16 +845,6 @@  static int bcm7xxx_28nm_probe(struct phy_device *phydev)
 	.phy_id		= (_oui),					\
 	.phy_id_mask	= 0xfffffff0,					\
 	.name		= _name,					\
-	/* PHY_GBIT_FEATURES */						\
-	.flags		= PHY_IS_INTERNAL,				\
-	.config_init	= bcm7xxx_28nm_config_init,			\
-	.resume		= bcm7xxx_28nm_resume,				\
-	.get_tunable	= bcm7xxx_28nm_get_tunable,			\
-	.set_tunable	= bcm7xxx_28nm_set_tunable,			\
-	.get_sset_count	= bcm_phy_get_sset_count,			\
-	.get_strings	= bcm_phy_get_strings,				\
-	.get_stats	= bcm7xxx_28nm_get_phy_stats,			\
-	.probe		= bcm7xxx_28nm_probe,				\
 }
 
 #define BCM7XXX_28NM_EPHY(_oui, _name)					\
@@ -862,16 +852,6 @@  static int bcm7xxx_28nm_probe(struct phy_device *phydev)
 	.phy_id		= (_oui),					\
 	.phy_id_mask	= 0xfffffff0,					\
 	.name		= _name,					\
-	/* PHY_BASIC_FEATURES */					\
-	.flags		= PHY_IS_INTERNAL,				\
-	.config_init	= bcm7xxx_28nm_ephy_config_init,		\
-	.resume		= bcm7xxx_28nm_ephy_resume,			\
-	.get_sset_count	= bcm_phy_get_sset_count,			\
-	.get_strings	= bcm_phy_get_strings,				\
-	.get_stats	= bcm7xxx_28nm_get_phy_stats,			\
-	.probe		= bcm7xxx_28nm_probe,				\
-	.read_mmd	= bcm7xxx_28nm_ephy_read_mmd,			\
-	.write_mmd	= bcm7xxx_28nm_ephy_write_mmd,			\
 }
 
 #define BCM7XXX_40NM_EPHY(_oui, _name)					\
@@ -879,12 +859,6 @@  static int bcm7xxx_28nm_probe(struct phy_device *phydev)
 	.phy_id         = (_oui),					\
 	.phy_id_mask    = 0xfffffff0,					\
 	.name           = _name,					\
-	/* PHY_BASIC_FEATURES */					\
-	.flags          = PHY_IS_INTERNAL,				\
-	.soft_reset	= genphy_soft_reset,				\
-	.config_init    = bcm7xxx_config_init,				\
-	.suspend        = bcm7xxx_suspend,				\
-	.resume         = bcm7xxx_config_init,				\
 }
 
 #define BCM7XXX_16NM_EPHY(_oui, _name)					\
@@ -892,41 +866,91 @@  static int bcm7xxx_28nm_probe(struct phy_device *phydev)
 	.phy_id		= (_oui),					\
 	.phy_id_mask	= 0xfffffff0,					\
 	.name		= _name,					\
-	/* PHY_BASIC_FEATURES */					\
-	.flags		= PHY_IS_INTERNAL,				\
-	.get_sset_count	= bcm_phy_get_sset_count,			\
-	.get_strings	= bcm_phy_get_strings,				\
-	.get_stats	= bcm7xxx_28nm_get_phy_stats,			\
-	.probe		= bcm7xxx_28nm_probe,				\
-	.config_init	= bcm7xxx_16nm_ephy_config_init,		\
-	.config_aneg	= genphy_config_aneg,				\
-	.read_status	= genphy_read_status,				\
-	.resume		= bcm7xxx_16nm_ephy_resume,			\
 }
 
 static struct phy_driver bcm7xxx_driver[] = {
-	BCM7XXX_28NM_EPHY(PHY_ID_BCM72113, "Broadcom BCM72113"),
-	BCM7XXX_28NM_EPHY(PHY_ID_BCM72116, "Broadcom BCM72116"),
-	BCM7XXX_16NM_EPHY(PHY_ID_BCM72165, "Broadcom BCM72165"),
-	BCM7XXX_28NM_GPHY(PHY_ID_BCM7250, "Broadcom BCM7250"),
-	BCM7XXX_28NM_EPHY(PHY_ID_BCM7255, "Broadcom BCM7255"),
-	BCM7XXX_28NM_EPHY(PHY_ID_BCM7260, "Broadcom BCM7260"),
-	BCM7XXX_28NM_EPHY(PHY_ID_BCM7268, "Broadcom BCM7268"),
-	BCM7XXX_28NM_EPHY(PHY_ID_BCM7271, "Broadcom BCM7271"),
-	BCM7XXX_28NM_GPHY(PHY_ID_BCM7278, "Broadcom BCM7278"),
-	BCM7XXX_28NM_GPHY(PHY_ID_BCM7364, "Broadcom BCM7364"),
-	BCM7XXX_28NM_GPHY(PHY_ID_BCM7366, "Broadcom BCM7366"),
-	BCM7XXX_16NM_EPHY(PHY_ID_BCM74165, "Broadcom BCM74165"),
-	BCM7XXX_28NM_GPHY(PHY_ID_BCM74371, "Broadcom BCM74371"),
-	BCM7XXX_28NM_GPHY(PHY_ID_BCM7439, "Broadcom BCM7439"),
-	BCM7XXX_28NM_GPHY(PHY_ID_BCM7439_2, "Broadcom BCM7439 (2)"),
-	BCM7XXX_28NM_GPHY(PHY_ID_BCM7445, "Broadcom BCM7445"),
-	BCM7XXX_40NM_EPHY(PHY_ID_BCM7346, "Broadcom BCM7346"),
-	BCM7XXX_40NM_EPHY(PHY_ID_BCM7362, "Broadcom BCM7362"),
-	BCM7XXX_40NM_EPHY(PHY_ID_BCM7425, "Broadcom BCM7425"),
-	BCM7XXX_40NM_EPHY(PHY_ID_BCM7429, "Broadcom BCM7429"),
-	BCM7XXX_40NM_EPHY(PHY_ID_BCM7435, "Broadcom BCM7435"),
-	BCM7XXX_16NM_EPHY(PHY_ID_BCM7712, "Broadcom BCM7712"),
+{
+	.name		= "Broadcom BCM7XXX 16NM EPHY",
+	.ids		= (const struct mdio_device_id []){
+		BCM7XXX_16NM_EPHY(PHY_ID_BCM72165, "Broadcom BCM72165"),
+		BCM7XXX_16NM_EPHY(PHY_ID_BCM74165, "Broadcom BCM74165"),
+		BCM7XXX_16NM_EPHY(PHY_ID_BCM7712, "Broadcom BCM7712"),
+		{ /* sentinel */ },
+	},
+	/* PHY_BASIC_FEATURES */
+	.flags		= PHY_IS_INTERNAL,
+	.get_sset_count	= bcm_phy_get_sset_count,
+	.get_strings	= bcm_phy_get_strings,
+	.get_stats	= bcm7xxx_28nm_get_phy_stats,
+	.probe		= bcm7xxx_28nm_probe,
+	.config_init	= bcm7xxx_16nm_ephy_config_init,
+	.config_aneg	= genphy_config_aneg,
+	.read_status	= genphy_read_status,
+	.resume		= bcm7xxx_16nm_ephy_resume,
+},
+{
+	.name		= "Broadcom BCM7XXX 28NM GPHY",
+	.ids		= (const struct mdio_device_id []){
+		BCM7XXX_28NM_GPHY(PHY_ID_BCM7250, "Broadcom BCM7250"),
+		BCM7XXX_28NM_GPHY(PHY_ID_BCM7278, "Broadcom BCM7278"),
+		BCM7XXX_28NM_GPHY(PHY_ID_BCM7364, "Broadcom BCM7364"),
+		BCM7XXX_28NM_GPHY(PHY_ID_BCM7366, "Broadcom BCM7366"),
+		BCM7XXX_28NM_GPHY(PHY_ID_BCM74371, "Broadcom BCM74371"),
+		BCM7XXX_28NM_GPHY(PHY_ID_BCM7439, "Broadcom BCM7439"),
+		BCM7XXX_28NM_GPHY(PHY_ID_BCM7439_2, "Broadcom BCM7439 (2)"),
+		BCM7XXX_28NM_GPHY(PHY_ID_BCM7445, "Broadcom BCM7445"),
+		{ /* sentinel */ },
+	},
+	/* PHY_GBIT_FEATURES */
+	.flags		= PHY_IS_INTERNAL,
+	.config_init	= bcm7xxx_28nm_config_init,
+	.resume		= bcm7xxx_28nm_resume,
+	.get_tunable	= bcm7xxx_28nm_get_tunable,
+	.set_tunable	= bcm7xxx_28nm_set_tunable,
+	.get_sset_count	= bcm_phy_get_sset_count,
+	.get_strings	= bcm_phy_get_strings,
+	.get_stats	= bcm7xxx_28nm_get_phy_stats,
+	.probe		= bcm7xxx_28nm_probe,
+},
+{
+	.name		= "Broadcom BCM7XXX 28NM EPHY",
+	.ids		= (const struct mdio_device_id []){
+		BCM7XXX_28NM_EPHY(PHY_ID_BCM72113, "Broadcom BCM72113"),
+		BCM7XXX_28NM_EPHY(PHY_ID_BCM72116, "Broadcom BCM72116"),
+		BCM7XXX_28NM_EPHY(PHY_ID_BCM7255, "Broadcom BCM7255"),
+		BCM7XXX_28NM_EPHY(PHY_ID_BCM7260, "Broadcom BCM7260"),
+		BCM7XXX_28NM_EPHY(PHY_ID_BCM7268, "Broadcom BCM7268"),
+		BCM7XXX_28NM_EPHY(PHY_ID_BCM7271, "Broadcom BCM7271"),
+		{ /* sentinel */ },
+	},
+	/* PHY_BASIC_FEATURES */
+	.flags		= PHY_IS_INTERNAL,
+	.config_init	= bcm7xxx_28nm_ephy_config_init,
+	.resume		= bcm7xxx_28nm_ephy_resume,
+	.get_sset_count	= bcm_phy_get_sset_count,
+	.get_strings	= bcm_phy_get_strings,
+	.get_stats	= bcm7xxx_28nm_get_phy_stats,
+	.probe		= bcm7xxx_28nm_probe,
+	.read_mmd	= bcm7xxx_28nm_ephy_read_mmd,
+	.write_mmd	= bcm7xxx_28nm_ephy_write_mmd,
+},
+{
+	.name		= "Broadcom BCM7XXX 40NM EPHY",
+	.ids		= (const struct mdio_device_id []){
+		BCM7XXX_40NM_EPHY(PHY_ID_BCM7346, "Broadcom BCM7346"),
+		BCM7XXX_40NM_EPHY(PHY_ID_BCM7362, "Broadcom BCM7362"),
+		BCM7XXX_40NM_EPHY(PHY_ID_BCM7425, "Broadcom BCM7425"),
+		BCM7XXX_40NM_EPHY(PHY_ID_BCM7429, "Broadcom BCM7429"),
+		BCM7XXX_40NM_EPHY(PHY_ID_BCM7435, "Broadcom BCM7435"),
+		{ /* sentinel */ },
+	},
+	/* PHY_BASIC_FEATURES */
+	.flags          = PHY_IS_INTERNAL,
+	.soft_reset	= genphy_soft_reset,
+	.config_init    = bcm7xxx_config_init,
+	.suspend        = bcm7xxx_suspend,
+	.resume         = bcm7xxx_config_init,
+},
 };
 
 static struct mdio_device_id __maybe_unused bcm7xxx_tbl[] = {