diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2023-08-24 14:37:53 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-08-25 18:55:18 -0700 |
| commit | 70934c7c99ad01778eef83e898df4c624e52492f (patch) | |
| tree | 022785dd5b3da29c579b2d975d785f6dcd449b43 | |
| parent | 215eb9f962091ebaab96be2c18cf5d0f5174a4d6 (diff) | |
net: phylink: add phylink_limit_mac_speed()
Add a function which can be used to limit the phylink MAC capabilities
to an upper speed limit.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/E1qZAX3-005pTi-K1@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/phy/phylink.c | 18 | ||||
| -rw-r--r-- | include/linux/phylink.h | 2 |
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 160bce608c34..0d7354955d62 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -427,6 +427,24 @@ static struct { }; /** + * phylink_limit_mac_speed - limit the phylink_config to a maximum speed + * @config: pointer to a &struct phylink_config + * @max_speed: maximum speed + * + * Mask off MAC capabilities for speeds higher than the @max_speed parameter. + * Any further motifications of config.mac_capabilities will override this. + */ +void phylink_limit_mac_speed(struct phylink_config *config, u32 max_speed) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(phylink_caps_params) && + phylink_caps_params[i].speed > max_speed; i++) + config->mac_capabilities &= ~phylink_caps_params[i].mask; +} +EXPORT_SYMBOL_GPL(phylink_limit_mac_speed); + +/** * phylink_cap_from_speed_duplex - Get mac capability from speed/duplex * @speed: the speed to search for * @duplex: the duplex to search for diff --git a/include/linux/phylink.h b/include/linux/phylink.h index 789c516c6b4a..7d07f8736431 100644 --- a/include/linux/phylink.h +++ b/include/linux/phylink.h @@ -223,6 +223,8 @@ struct phylink_config { unsigned long mac_capabilities; }; +void phylink_limit_mac_speed(struct phylink_config *config, u32 max_speed); + /** * struct phylink_mac_ops - MAC operations structure. * @validate: Validate and update the link configuration. |