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net: ethtool: Add infrastructure for reporting cable test results

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Provide infrastructure for PHY drivers to report the cable test
results.  A netlink skb is associated to the phydev. Helpers will be
added which can add results to this skb. Once the test has finished
the results are sent to user space.

When netlink ethtool is not part of the kernel configuration stubs are
provided. It is also impossible to trigger a cable test, so the error
code returned by the alloc function is of no consequence.

v2:
Include the status complete in the netlink notification message

v4:
Replace -EINVAL with -EMSGSIZE

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Andrew Lunn
2020-05-10 21:12:36 +02:00
committed by Jakub Kicinski
parent 0df960f14e
commit 1dd3f212af
4 changed files with 100 additions and 2 deletions
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20
include/linux/ethtool_netlink.h
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@@ -14,4 +14,24 @@ enum ethtool_multicast_groups {
ETHNL_MCGRP_MONITOR,
};
struct phy_device;
#if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)
int ethnl_cable_test_alloc(struct phy_device *phydev);
void ethnl_cable_test_free(struct phy_device *phydev);
void ethnl_cable_test_finished(struct phy_device *phydev);
#else
static inline int ethnl_cable_test_alloc(struct phy_device *phydev)
{
return -ENOTSUPP;
}
static inline void ethnl_cable_test_free(struct phy_device *phydev)
{
}
static inline void ethnl_cable_test_finished(struct phy_device *phydev)
{
}
#endif /* IS_ENABLED(ETHTOOL_NETLINK) */
#endif /* _LINUX_ETHTOOL_NETLINK_H_ */