include/linux/fw_table.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  fw_tables.h - Parsing support for ACPI and ACPI-like tables provided by
   4  *                platform or device firmware
   5  *
   6  *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   7  *  Copyright (C) 2023 Intel Corp.
   8  */
   9 #ifndef _FW_TABLE_H_
  10 #define _FW_TABLE_H_
  11
  12 union acpi_subtable_headers;
  13
  14 typedef int (*acpi_tbl_entry_handler)(union acpi_subtable_headers *header,
  15                                       const unsigned long end);
  16
  17 typedef int (*acpi_tbl_entry_handler_arg)(union acpi_subtable_headers *header,
  18                                           void *arg, const unsigned long end);
  19
  20 struct acpi_subtable_proc {
  21         int id;
  22         acpi_tbl_entry_handler handler;
  23         acpi_tbl_entry_handler_arg handler_arg;
  24         void *arg;
  25         int count;
  26 };
  27
  28 union fw_table_header {
  29         struct acpi_table_header acpi;
  30         struct acpi_table_cdat cdat;
  31 };
  32
  33 union acpi_subtable_headers {
  34         struct acpi_subtable_header common;
  35         struct acpi_hmat_structure hmat;
  36         struct acpi_prmt_module_header prmt;
  37         struct acpi_cedt_header cedt;
  38         struct acpi_cdat_header cdat;
  39 };
  40
  41 int acpi_parse_entries_array(char *id, unsigned long table_size,
  42                              union fw_table_header *table_header,
  43                              unsigned long max_length,
  44                              struct acpi_subtable_proc *proc,
  45                              int proc_num, unsigned int max_entries);
  46
  47 int cdat_table_parse(enum acpi_cdat_type type,
  48                      acpi_tbl_entry_handler_arg handler_arg, void *arg,
  49                      struct acpi_table_cdat *table_header,
  50                      unsigned long length);
  51
  52 /* CXL is the only non-ACPI consumer of the FIRMWARE_TABLE library */
  53 #if IS_ENABLED(CONFIG_ACPI) && !IS_ENABLED(CONFIG_CXL_BUS)
  54 #define EXPORT_SYMBOL_FWTBL_LIB(x) EXPORT_SYMBOL_ACPI_LIB(x)
  55 #define __init_or_fwtbl_lib __init_or_acpilib
  56 #else
  57 #define EXPORT_SYMBOL_FWTBL_LIB(x) EXPORT_SYMBOL_NS_GPL(x, "CXL")
  58 #define __init_or_fwtbl_lib
  59 #endif
  60
  61 #endif