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60495b6622
net/core/dev_ioctl.c (built-in code) will want to call phy_mii_ioctl()
for hardware timestamping purposes. This is not directly possible,
because phy_mii_ioctl() is a symbol provided under CONFIG_PHYLIB.
Do something similar to what was done in DSA in commit 5a17818682
("net: dsa: replace NETDEV_PRE_CHANGE_HWTSTAMP notifier with a stub"),
and arrange some indirect calls to phy_mii_ioctl() through a stub
structure containing function pointers, that's provided by phylib as
built-in even when CONFIG_PHYLIB=m, and which phy_init() populates at
runtime (module insertion).
Note: maybe the ownership of the ethtool_phy_ops singleton is backwards,
and the methods exposed by that should be later merged into phylib_stubs.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20230801142824.1772134-12-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Stubs for the Network PHY library
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*/
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#include <linux/rtnetlink.h>
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struct kernel_hwtstamp_config;
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struct netlink_ext_ack;
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struct phy_device;
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#if IS_ENABLED(CONFIG_PHYLIB)
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extern const struct phylib_stubs *phylib_stubs;
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struct phylib_stubs {
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int (*hwtstamp_get)(struct phy_device *phydev,
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struct kernel_hwtstamp_config *config);
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int (*hwtstamp_set)(struct phy_device *phydev,
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struct kernel_hwtstamp_config *config,
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struct netlink_ext_ack *extack);
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};
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static inline int phy_hwtstamp_get(struct phy_device *phydev,
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struct kernel_hwtstamp_config *config)
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{
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/* phylib_register_stubs() and phylib_unregister_stubs()
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* also run under rtnl_lock().
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*/
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ASSERT_RTNL();
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if (!phylib_stubs)
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return -EOPNOTSUPP;
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return phylib_stubs->hwtstamp_get(phydev, config);
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}
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static inline int phy_hwtstamp_set(struct phy_device *phydev,
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struct kernel_hwtstamp_config *config,
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struct netlink_ext_ack *extack)
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{
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/* phylib_register_stubs() and phylib_unregister_stubs()
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* also run under rtnl_lock().
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*/
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ASSERT_RTNL();
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if (!phylib_stubs)
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return -EOPNOTSUPP;
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return phylib_stubs->hwtstamp_set(phydev, config, extack);
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}
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#else
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static inline int phy_hwtstamp_get(struct phy_device *phydev,
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struct kernel_hwtstamp_config *config)
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{
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return -EOPNOTSUPP;
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}
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static inline int phy_hwtstamp_set(struct phy_device *phydev,
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struct kernel_hwtstamp_config *config,
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struct netlink_ext_ack *extack)
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{
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return -EOPNOTSUPP;
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}
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#endif
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