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net: ethtool: create and export ethtool_dev_mm_supported()

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Create a wrapper over __ethtool_dev_mm_supported() which also calls
ethnl_ops_begin() and ethnl_ops_complete(). It can be used by other code
layers, such as tc, to make sure that preemptible TCs are supported
(this is true if an underlying MAC Merge layer exists).

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ferenc Fejes <fejes@inf.elte.hu>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Vladimir Oltean 2023-04-11 21:01:49 +03:00 committed by Jakub Kicinski
parent 85a4abed15
commit d54151aa0f
2 changed files with 29 additions and 0 deletions
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6
include/linux/ethtool_netlink.h
View File

@ -39,6 +39,7 @@ void ethtool_aggregate_pause_stats(struct net_device *dev,
struct ethtool_pause_stats *pause_stats);
void ethtool_aggregate_rmon_stats(struct net_device *dev,
struct ethtool_rmon_stats *rmon_stats);
bool ethtool_dev_mm_supported(struct net_device *dev);
#else
static inline int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd)
@ -112,5 +113,10 @@ ethtool_aggregate_rmon_stats(struct net_device *dev,
{
}
static inline bool ethtool_dev_mm_supported(struct net_device *dev)
{
return false;
}
#endif /* IS_ENABLED(CONFIG_ETHTOOL_NETLINK) */
#endif /* _LINUX_ETHTOOL_NETLINK_H_ */

23
net/ethtool/mm.c
View File

@ -249,3 +249,26 @@ bool __ethtool_dev_mm_supported(struct net_device *dev)
return !ret;
}
bool ethtool_dev_mm_supported(struct net_device *dev)
{
const struct ethtool_ops *ops = dev->ethtool_ops;
bool supported;
int ret;
ASSERT_RTNL();
if (!ops)
return false;
ret = ethnl_ops_begin(dev);
if (ret < 0)
return false;
supported = __ethtool_dev_mm_supported(dev);
ethnl_ops_complete(dev);
return supported;
}
EXPORT_SYMBOL_GPL(ethtool_dev_mm_supported);