1 /*-
2 * Copyright (c) 2025 The FreeBSD Foundation
3 * Copyright (c) 2025 Jean-Sébastien Pédron
4 *
5 * This software was developed by Jean-Sébastien Pédron under sponsorship
6 * from the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef _LINUXKPI_LINUX_ACPI_AMD_WBRF_H_
31 #define _LINUXKPI_LINUX_ACPI_AMD_WBRF_H_
32
33 #include <linux/device.h>
34 #include <linux/notifier.h>
35
36 #define MAX_NUM_OF_WBRF_RANGES 11
37
38 #define WBRF_RECORD_ADD 0x0
39 #define WBRF_RECORD_REMOVE 0x1
40
41 struct freq_band_range {
42 uint64_t start;
43 uint64_t end;
44 };
45
46 struct wbrf_ranges_in_out {
47 uint64_t num_of_ranges;
48 struct freq_band_range band_list[MAX_NUM_OF_WBRF_RANGES];
49 };
50
51 enum wbrf_notifier_actions {
52 WBRF_CHANGED,
53 };
54
55 /*
56 * The following functions currently have dummy implementations that, on Linux,
57 * are used when CONFIG_AMD_WBRF is not set at compile time.
58 */
59
60 static inline bool
acpi_amd_wbrf_supported_consumer(struct device * dev)61 acpi_amd_wbrf_supported_consumer(struct device *dev)
62 {
63 return (false);
64 }
65
66 static inline int
acpi_amd_wbrf_add_remove(struct device * dev,uint8_t action,struct wbrf_ranges_in_out * in)67 acpi_amd_wbrf_add_remove(struct device *dev, uint8_t action,
68 struct wbrf_ranges_in_out *in)
69 {
70 return (-ENODEV);
71 }
72
73 static inline bool
acpi_amd_wbrf_supported_producer(struct device * dev)74 acpi_amd_wbrf_supported_producer(struct device *dev)
75 {
76 return (false);
77 }
78
79 static inline int
amd_wbrf_retrieve_freq_band(struct device * dev,struct wbrf_ranges_in_out * out)80 amd_wbrf_retrieve_freq_band(struct device *dev, struct wbrf_ranges_in_out *out)
81 {
82 return (-ENODEV);
83 }
84
85 static inline int
amd_wbrf_register_notifier(struct notifier_block * nb)86 amd_wbrf_register_notifier(struct notifier_block *nb)
87 {
88 return (-ENODEV);
89 }
90
91 static inline int
amd_wbrf_unregister_notifier(struct notifier_block * nb)92 amd_wbrf_unregister_notifier(struct notifier_block *nb)
93 {
94 return (-ENODEV);
95 }
96
97 #endif /* _LINUXKPI_LINUX_ACPI_AMD_WBRF_H_ */
98