include/linux/net_tstamp.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef _LINUX_NET_TIMESTAMPING_H_
   4 #define _LINUX_NET_TIMESTAMPING_H_
   5
   6 #include <uapi/linux/net_tstamp.h>
   7
   8 #define SOF_TIMESTAMPING_SOFTWARE_MASK  (SOF_TIMESTAMPING_RX_SOFTWARE | \
   9                                          SOF_TIMESTAMPING_TX_SOFTWARE | \
  10                                          SOF_TIMESTAMPING_SOFTWARE)
  11
  12 #define SOF_TIMESTAMPING_HARDWARE_MASK  (SOF_TIMESTAMPING_RX_HARDWARE | \
  13                                          SOF_TIMESTAMPING_TX_HARDWARE | \
  14                                          SOF_TIMESTAMPING_RAW_HARDWARE)
  15
  16 enum hwtstamp_source {
  17         HWTSTAMP_SOURCE_UNSPEC,
  18         HWTSTAMP_SOURCE_NETDEV,
  19         HWTSTAMP_SOURCE_PHYLIB,
  20 };
  21
  22 /**
  23  * struct hwtstamp_provider_desc - hwtstamp provider description
  24  *
  25  * @index: index of the hwtstamp provider.
  26  * @qualifier: hwtstamp provider qualifier.
  27  */
  28 struct hwtstamp_provider_desc {
  29         int index;
  30         enum hwtstamp_provider_qualifier qualifier;
  31 };
  32
  33 /**
  34  * struct hwtstamp_provider - hwtstamp provider object
  35  *
  36  * @rcu_head: RCU callback used to free the struct.
  37  * @source: source of the hwtstamp provider.
  38  * @phydev: pointer of the phydev source in case a PTP coming from phylib
  39  * @desc: hwtstamp provider description.
  40  */
  41
  42 struct hwtstamp_provider {
  43         struct rcu_head rcu_head;
  44         enum hwtstamp_source source;
  45         struct phy_device *phydev;
  46         struct hwtstamp_provider_desc desc;
  47 };
  48
  49 /**
  50  * struct kernel_hwtstamp_config - Kernel copy of struct hwtstamp_config
  51  *
  52  * @flags: see struct hwtstamp_config
  53  * @tx_type: see struct hwtstamp_config
  54  * @rx_filter: see struct hwtstamp_config
  55  * @ifr: pointer to ifreq structure from the original ioctl request, to pass to
  56  *      a legacy implementation of a lower driver
  57  * @copied_to_user: request was passed to a legacy implementation which already
  58  *      copied the ioctl request back to user space
  59  * @source: indication whether timestamps should come from the netdev or from
  60  *      an attached phylib PHY
  61  * @qualifier: qualifier of the hwtstamp provider
  62  *
  63  * Prefer using this structure for in-kernel processing of hardware
  64  * timestamping configuration, over the inextensible struct hwtstamp_config
  65  * exposed to the %SIOCGHWTSTAMP and %SIOCSHWTSTAMP ioctl UAPI.
  66  */
  67 struct kernel_hwtstamp_config {
  68         int flags;
  69         int tx_type;
  70         int rx_filter;
  71         struct ifreq *ifr;
  72         bool copied_to_user;
  73         enum hwtstamp_source source;
  74         enum hwtstamp_provider_qualifier qualifier;
  75 };
  76
  77 static inline void hwtstamp_config_to_kernel(struct kernel_hwtstamp_config *kernel_cfg,
  78                                              const struct hwtstamp_config *cfg)
  79 {
  80         kernel_cfg->flags = cfg->flags;
  81         kernel_cfg->tx_type = cfg->tx_type;
  82         kernel_cfg->rx_filter = cfg->rx_filter;
  83 }
  84
  85 static inline void hwtstamp_config_from_kernel(struct hwtstamp_config *cfg,
  86                                                const struct kernel_hwtstamp_config *kernel_cfg)
  87 {
  88         cfg->flags = kernel_cfg->flags;
  89         cfg->tx_type = kernel_cfg->tx_type;
  90         cfg->rx_filter = kernel_cfg->rx_filter;
  91 }
  92
  93 static inline bool kernel_hwtstamp_config_changed(const struct kernel_hwtstamp_config *a,
  94                                                   const struct kernel_hwtstamp_config *b)
  95 {
  96         return a->flags != b->flags ||
  97                a->tx_type != b->tx_type ||
  98                a->rx_filter != b->rx_filter;
  99 }
 100
 101 #endif /* _LINUX_NET_TIMESTAMPING_H_ */