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
hwtstamp_config_to_kernel(struct kernel_hwtstamp_config * kernel_cfg,const struct hwtstamp_config * cfg)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
hwtstamp_config_from_kernel(struct hwtstamp_config * cfg,const struct kernel_hwtstamp_config * kernel_cfg)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
kernel_hwtstamp_config_changed(const struct kernel_hwtstamp_config * a,const struct kernel_hwtstamp_config * b)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_ */
102