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
8enum hwtstamp_source {
9	HWTSTAMP_SOURCE_NETDEV,
10	HWTSTAMP_SOURCE_PHYLIB,
11};
12
13/**
14 * struct kernel_hwtstamp_config - Kernel copy of struct hwtstamp_config
15 *
16 * @flags: see struct hwtstamp_config
17 * @tx_type: see struct hwtstamp_config
18 * @rx_filter: see struct hwtstamp_config
19 * @ifr: pointer to ifreq structure from the original ioctl request, to pass to
20 *	a legacy implementation of a lower driver
21 * @copied_to_user: request was passed to a legacy implementation which already
22 *	copied the ioctl request back to user space
23 * @source: indication whether timestamps should come from the netdev or from
24 *	an attached phylib PHY
25 *
26 * Prefer using this structure for in-kernel processing of hardware
27 * timestamping configuration, over the inextensible struct hwtstamp_config
28 * exposed to the %SIOCGHWTSTAMP and %SIOCSHWTSTAMP ioctl UAPI.
29 */
30struct kernel_hwtstamp_config {
31	int flags;
32	int tx_type;
33	int rx_filter;
34	struct ifreq *ifr;
35	bool copied_to_user;
36	enum hwtstamp_source source;
37};
38
39static inline void hwtstamp_config_to_kernel(struct kernel_hwtstamp_config *kernel_cfg,
40					     const struct hwtstamp_config *cfg)
41{
42	kernel_cfg->flags = cfg->flags;
43	kernel_cfg->tx_type = cfg->tx_type;
44	kernel_cfg->rx_filter = cfg->rx_filter;
45}
46
47static inline void hwtstamp_config_from_kernel(struct hwtstamp_config *cfg,
48					       const struct kernel_hwtstamp_config *kernel_cfg)
49{
50	cfg->flags = kernel_cfg->flags;
51	cfg->tx_type = kernel_cfg->tx_type;
52	cfg->rx_filter = kernel_cfg->rx_filter;
53}
54
55static inline bool kernel_hwtstamp_config_changed(const struct kernel_hwtstamp_config *a,
56						  const struct kernel_hwtstamp_config *b)
57{
58	return a->flags != b->flags ||
59	       a->tx_type != b->tx_type ||
60	       a->rx_filter != b->rx_filter;
61}
62
63#endif /* _LINUX_NET_TIMESTAMPING_H_ */
64