include/linux/acpi_amd_wbrf.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Wifi Band Exclusion Interface (AMD ACPI Implementation)
   4  * Copyright (C) 2023 Advanced Micro Devices
   5  */
   6
   7 #ifndef _ACPI_AMD_WBRF_H
   8 #define _ACPI_AMD_WBRF_H
   9
  10 #include <linux/device.h>
  11 #include <linux/notifier.h>
  12
  13 /* The maximum number of frequency band ranges */
  14 #define MAX_NUM_OF_WBRF_RANGES          11
  15
  16 /* Record actions */
  17 #define WBRF_RECORD_ADD         0x0
  18 #define WBRF_RECORD_REMOVE      0x1
  19
  20 /**
  21  * struct freq_band_range - Wifi frequency band range definition
  22  * @start: start frequency point (in Hz)
  23  * @end: end frequency point (in Hz)
  24  */
  25 struct freq_band_range {
  26         u64             start;
  27         u64             end;
  28 };
  29
  30 /**
  31  * struct wbrf_ranges_in_out - wbrf ranges info
  32  * @num_of_ranges: total number of band ranges in this struct
  33  * @band_list: array of Wifi band ranges
  34  */
  35 struct wbrf_ranges_in_out {
  36         u64                     num_of_ranges;
  37         struct freq_band_range  band_list[MAX_NUM_OF_WBRF_RANGES];
  38 };
  39
  40 /**
  41  * enum wbrf_notifier_actions - wbrf notifier actions index
  42  * @WBRF_CHANGED: there was some frequency band updates. The consumers
  43  *               should retrieve the latest active frequency bands.
  44  */
  45 enum wbrf_notifier_actions {
  46         WBRF_CHANGED,
  47 };
  48
  49 #if IS_ENABLED(CONFIG_AMD_WBRF)
  50 bool acpi_amd_wbrf_supported_producer(struct device *dev);
  51 int acpi_amd_wbrf_add_remove(struct device *dev, uint8_t action, struct wbrf_ranges_in_out *in);
  52 bool acpi_amd_wbrf_supported_consumer(struct device *dev);
  53 int amd_wbrf_retrieve_freq_band(struct device *dev, struct wbrf_ranges_in_out *out);
  54 int amd_wbrf_register_notifier(struct notifier_block *nb);
  55 int amd_wbrf_unregister_notifier(struct notifier_block *nb);
  56 #else
  57 static inline
  58 bool acpi_amd_wbrf_supported_consumer(struct device *dev)
  59 {
  60         return false;
  61 }
  62
  63 static inline
  64 int acpi_amd_wbrf_add_remove(struct device *dev, uint8_t action, struct wbrf_ranges_in_out *in)
  65 {
  66         return -ENODEV;
  67 }
  68
  69 static inline
  70 bool acpi_amd_wbrf_supported_producer(struct device *dev)
  71 {
  72         return false;
  73 }
  74 static inline
  75 int amd_wbrf_retrieve_freq_band(struct device *dev, struct wbrf_ranges_in_out *out)
  76 {
  77         return -ENODEV;
  78 }
  79 static inline
  80 int amd_wbrf_register_notifier(struct notifier_block *nb)
  81 {
  82         return -ENODEV;
  83 }
  84 static inline
  85 int amd_wbrf_unregister_notifier(struct notifier_block *nb)
  86 {
  87         return -ENODEV;
  88 }
  89 #endif /* CONFIG_AMD_WBRF */
  90
  91 #endif /* _ACPI_AMD_WBRF_H */