include/linux/phylib_stubs.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Stubs for the Network PHY library
   4  */
   5
   6 #include <linux/rtnetlink.h>
   7
   8 struct kernel_hwtstamp_config;
   9 struct netlink_ext_ack;
  10 struct phy_device;
  11
  12 #if IS_ENABLED(CONFIG_PHYLIB)
  13
  14 extern const struct phylib_stubs *phylib_stubs;
  15
  16 struct phylib_stubs {
  17         int (*hwtstamp_get)(struct phy_device *phydev,
  18                             struct kernel_hwtstamp_config *config);
  19         int (*hwtstamp_set)(struct phy_device *phydev,
  20                             struct kernel_hwtstamp_config *config,
  21                             struct netlink_ext_ack *extack);
  22 };
  23
  24 static inline int phy_hwtstamp_get(struct phy_device *phydev,
  25                                    struct kernel_hwtstamp_config *config)
  26 {
  27         /* phylib_register_stubs() and phylib_unregister_stubs()
  28          * also run under rtnl_lock().
  29          */
  30         ASSERT_RTNL();
  31
  32         if (!phylib_stubs)
  33                 return -EOPNOTSUPP;
  34
  35         return phylib_stubs->hwtstamp_get(phydev, config);
  36 }
  37
  38 static inline int phy_hwtstamp_set(struct phy_device *phydev,
  39                                    struct kernel_hwtstamp_config *config,
  40                                    struct netlink_ext_ack *extack)
  41 {
  42         /* phylib_register_stubs() and phylib_unregister_stubs()
  43          * also run under rtnl_lock().
  44          */
  45         ASSERT_RTNL();
  46
  47         if (!phylib_stubs)
  48                 return -EOPNOTSUPP;
  49
  50         return phylib_stubs->hwtstamp_set(phydev, config, extack);
  51 }
  52
  53 #else
  54
  55 static inline int phy_hwtstamp_get(struct phy_device *phydev,
  56                                    struct kernel_hwtstamp_config *config)
  57 {
  58         return -EOPNOTSUPP;
  59 }
  60
  61 static inline int phy_hwtstamp_set(struct phy_device *phydev,
  62                                    struct kernel_hwtstamp_config *config,
  63                                    struct netlink_ext_ack *extack)
  64 {
  65         return -EOPNOTSUPP;
  66 }
  67
  68 #endif