Thomas Gleixner | c942fdd | 2019-05-27 08:55:06 +0200 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * acpi_utils.c - ACPI Utility Functions ($Revision: 10 $) |
| 4 | * |
| 5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 11 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/init.h> |
| 13 | #include <linux/types.h> |
Toshi Kani | fbfddae | 2012-11-21 01:36:28 +0000 | [diff] [blame] | 14 | #include <linux/hardirq.h> |
| 15 | #include <linux/acpi.h> |
Bjørn Mork | 45fef5b | 2014-05-22 12:47:47 +0200 | [diff] [blame] | 16 | #include <linux/dynamic_debug.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 18 | #include "internal.h" |
Lukas Wunner | 2d12b6b | 2015-11-25 21:19:55 +0100 | [diff] [blame] | 19 | #include "sleep.h" |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #define _COMPONENT ACPI_BUS_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 22 | ACPI_MODULE_NAME("utils"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | /* -------------------------------------------------------------------------- |
| 25 | Object Evaluation Helpers |
| 26 | -------------------------------------------------------------------------- */ |
Harvey Harrison | 4fd7f51 | 2008-02-15 17:07:19 -0800 | [diff] [blame] | 27 | static void |
| 28 | acpi_util_eval_error(acpi_handle h, acpi_string p, acpi_status s) |
| 29 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #ifdef ACPI_DEBUG_OUTPUT |
Harvey Harrison | 4fd7f51 | 2008-02-15 17:07:19 -0800 | [diff] [blame] | 31 | char prefix[80] = {'\0'}; |
| 32 | struct acpi_buffer buffer = {sizeof(prefix), prefix}; |
| 33 | acpi_get_name(h, ACPI_FULL_PATHNAME, &buffer); |
| 34 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluate [%s.%s]: %s\n", |
| 35 | (char *) prefix, p, acpi_format_exception(s))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #else |
Harvey Harrison | 4fd7f51 | 2008-02-15 17:07:19 -0800 | [diff] [blame] | 37 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #endif |
Harvey Harrison | 4fd7f51 | 2008-02-15 17:07:19 -0800 | [diff] [blame] | 39 | } |
| 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 42 | acpi_extract_package(union acpi_object *package, |
| 43 | struct acpi_buffer *format, struct acpi_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 45 | u32 size_required = 0; |
| 46 | u32 tail_offset = 0; |
| 47 | char *format_string = NULL; |
| 48 | u32 format_count = 0; |
| 49 | u32 i = 0; |
| 50 | u8 *head = NULL; |
| 51 | u8 *tail = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 54 | if (!package || (package->type != ACPI_TYPE_PACKAGE) |
| 55 | || (package->package.count < 1)) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 56 | printk(KERN_WARNING PREFIX "Invalid package argument\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 57 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | } |
| 59 | |
| 60 | if (!format || !format->pointer || (format->length < 1)) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 61 | printk(KERN_WARNING PREFIX "Invalid format argument\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 62 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | if (!buffer) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 66 | printk(KERN_WARNING PREFIX "Invalid buffer argument\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 67 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | } |
| 69 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 70 | format_count = (format->length / sizeof(char)) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | if (format_count > package->package.count) { |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 72 | printk(KERN_WARNING PREFIX "Format specifies more objects [%d]" |
| 73 | " than exist in package [%d].\n", |
| 74 | format_count, package->package.count); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 75 | return AE_BAD_DATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | } |
| 77 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 78 | format_string = format->pointer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | /* |
| 81 | * Calculate size_required. |
| 82 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 83 | for (i = 0; i < format_count; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
| 85 | union acpi_object *element = &(package->package.elements[i]); |
| 86 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | switch (element->type) { |
| 88 | |
| 89 | case ACPI_TYPE_INTEGER: |
| 90 | switch (format_string[i]) { |
| 91 | case 'N': |
Lin Ming | 439913f | 2010-01-28 10:53:19 +0800 | [diff] [blame] | 92 | size_required += sizeof(u64); |
| 93 | tail_offset += sizeof(u64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | break; |
| 95 | case 'S': |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 96 | size_required += |
Lin Ming | 439913f | 2010-01-28 10:53:19 +0800 | [diff] [blame] | 97 | sizeof(char *) + sizeof(u64) + |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 98 | sizeof(char); |
| 99 | tail_offset += sizeof(char *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | break; |
| 101 | default: |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 102 | printk(KERN_WARNING PREFIX "Invalid package element" |
Colin Ian King | e7e92ec9 | 2013-10-29 10:34:19 +0000 | [diff] [blame] | 103 | " [%d]: got number, expecting" |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 104 | " [%c]\n", |
| 105 | i, format_string[i]); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 106 | return AE_BAD_DATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | break; |
| 108 | } |
| 109 | break; |
| 110 | |
| 111 | case ACPI_TYPE_STRING: |
| 112 | case ACPI_TYPE_BUFFER: |
| 113 | switch (format_string[i]) { |
| 114 | case 'S': |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 115 | size_required += |
| 116 | sizeof(char *) + |
| 117 | (element->string.length * sizeof(char)) + |
| 118 | sizeof(char); |
| 119 | tail_offset += sizeof(char *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | break; |
| 121 | case 'B': |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 122 | size_required += |
Fabian Frederick | d93de34 | 2014-11-16 10:57:00 +0100 | [diff] [blame] | 123 | sizeof(u8 *) + element->buffer.length; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 124 | tail_offset += sizeof(u8 *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | break; |
| 126 | default: |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 127 | printk(KERN_WARNING PREFIX "Invalid package element" |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 128 | " [%d] got string/buffer," |
Colin Ian King | e7e92ec9 | 2013-10-29 10:34:19 +0000 | [diff] [blame] | 129 | " expecting [%c]\n", |
Len Brown | cece929 | 2006-06-26 23:04:31 -0400 | [diff] [blame] | 130 | i, format_string[i]); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 131 | return AE_BAD_DATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | break; |
| 133 | } |
| 134 | break; |
Zhang Rui | e3ec483 | 2014-03-16 21:34:16 +0800 | [diff] [blame] | 135 | case ACPI_TYPE_LOCAL_REFERENCE: |
| 136 | switch (format_string[i]) { |
| 137 | case 'R': |
| 138 | size_required += sizeof(void *); |
| 139 | tail_offset += sizeof(void *); |
| 140 | break; |
| 141 | default: |
| 142 | printk(KERN_WARNING PREFIX "Invalid package element" |
| 143 | " [%d] got reference," |
| 144 | " expecting [%c]\n", |
| 145 | i, format_string[i]); |
| 146 | return AE_BAD_DATA; |
| 147 | break; |
| 148 | } |
| 149 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
| 151 | case ACPI_TYPE_PACKAGE: |
| 152 | default: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 153 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 154 | "Found unsupported element at index=%d\n", |
| 155 | i)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | /* TBD: handle nested packages... */ |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 157 | return AE_SUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | break; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /* |
| 163 | * Validate output buffer. |
| 164 | */ |
Al Stone | e83dda0 | 2013-10-09 14:21:10 -0600 | [diff] [blame] | 165 | if (buffer->length == ACPI_ALLOCATE_BUFFER) { |
jhbird.choi@samsung.com | 2d0acb4 | 2014-03-20 16:35:56 +0900 | [diff] [blame] | 166 | buffer->pointer = ACPI_ALLOCATE_ZEROED(size_required); |
Al Stone | e83dda0 | 2013-10-09 14:21:10 -0600 | [diff] [blame] | 167 | if (!buffer->pointer) |
| 168 | return AE_NO_MEMORY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | buffer->length = size_required; |
Al Stone | e83dda0 | 2013-10-09 14:21:10 -0600 | [diff] [blame] | 170 | } else { |
| 171 | if (buffer->length < size_required) { |
| 172 | buffer->length = size_required; |
| 173 | return AE_BUFFER_OVERFLOW; |
| 174 | } else if (buffer->length != size_required || |
| 175 | !buffer->pointer) { |
| 176 | return AE_BAD_PARAMETER; |
| 177 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | head = buffer->pointer; |
| 181 | tail = buffer->pointer + tail_offset; |
| 182 | |
| 183 | /* |
| 184 | * Extract package data. |
| 185 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 186 | for (i = 0; i < format_count; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
| 188 | u8 **pointer = NULL; |
| 189 | union acpi_object *element = &(package->package.elements[i]); |
| 190 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | switch (element->type) { |
| 192 | |
| 193 | case ACPI_TYPE_INTEGER: |
| 194 | switch (format_string[i]) { |
| 195 | case 'N': |
Lin Ming | 439913f | 2010-01-28 10:53:19 +0800 | [diff] [blame] | 196 | *((u64 *) head) = |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 197 | element->integer.value; |
Lin Ming | 439913f | 2010-01-28 10:53:19 +0800 | [diff] [blame] | 198 | head += sizeof(u64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | break; |
| 200 | case 'S': |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 201 | pointer = (u8 **) head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | *pointer = tail; |
Lin Ming | 439913f | 2010-01-28 10:53:19 +0800 | [diff] [blame] | 203 | *((u64 *) tail) = |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 204 | element->integer.value; |
Lin Ming | 439913f | 2010-01-28 10:53:19 +0800 | [diff] [blame] | 205 | head += sizeof(u64 *); |
| 206 | tail += sizeof(u64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | /* NULL terminate string */ |
| 208 | *tail = (char)0; |
| 209 | tail += sizeof(char); |
| 210 | break; |
| 211 | default: |
| 212 | /* Should never get here */ |
| 213 | break; |
| 214 | } |
| 215 | break; |
| 216 | |
| 217 | case ACPI_TYPE_STRING: |
| 218 | case ACPI_TYPE_BUFFER: |
| 219 | switch (format_string[i]) { |
| 220 | case 'S': |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 221 | pointer = (u8 **) head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | *pointer = tail; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 223 | memcpy(tail, element->string.pointer, |
| 224 | element->string.length); |
| 225 | head += sizeof(char *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | tail += element->string.length * sizeof(char); |
| 227 | /* NULL terminate string */ |
| 228 | *tail = (char)0; |
| 229 | tail += sizeof(char); |
| 230 | break; |
| 231 | case 'B': |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 232 | pointer = (u8 **) head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | *pointer = tail; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 234 | memcpy(tail, element->buffer.pointer, |
| 235 | element->buffer.length); |
| 236 | head += sizeof(u8 *); |
Fabian Frederick | d93de34 | 2014-11-16 10:57:00 +0100 | [diff] [blame] | 237 | tail += element->buffer.length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | break; |
| 239 | default: |
| 240 | /* Should never get here */ |
| 241 | break; |
| 242 | } |
| 243 | break; |
Zhang Rui | e3ec483 | 2014-03-16 21:34:16 +0800 | [diff] [blame] | 244 | case ACPI_TYPE_LOCAL_REFERENCE: |
| 245 | switch (format_string[i]) { |
| 246 | case 'R': |
| 247 | *(void **)head = |
| 248 | (void *)element->reference.handle; |
| 249 | head += sizeof(void *); |
| 250 | break; |
| 251 | default: |
| 252 | /* Should never get here */ |
| 253 | break; |
| 254 | } |
| 255 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | case ACPI_TYPE_PACKAGE: |
| 257 | /* TBD: handle nested packages... */ |
| 258 | default: |
| 259 | /* Should never get here */ |
| 260 | break; |
| 261 | } |
| 262 | } |
| 263 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 264 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | EXPORT_SYMBOL(acpi_extract_package); |
| 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 270 | acpi_evaluate_integer(acpi_handle handle, |
| 271 | acpi_string pathname, |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 272 | struct acpi_object_list *arguments, unsigned long long *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 274 | acpi_status status = AE_OK; |
Pavel Machek | 4059907 | 2008-11-25 12:05:08 +0100 | [diff] [blame] | 275 | union acpi_object element; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 276 | struct acpi_buffer buffer = { 0, NULL }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | if (!data) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 279 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | buffer.length = sizeof(union acpi_object); |
Pavel Machek | 4059907 | 2008-11-25 12:05:08 +0100 | [diff] [blame] | 282 | buffer.pointer = &element; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | status = acpi_evaluate_object(handle, pathname, arguments, &buffer); |
| 284 | if (ACPI_FAILURE(status)) { |
| 285 | acpi_util_eval_error(handle, pathname, status); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 286 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | |
Pavel Machek | 4059907 | 2008-11-25 12:05:08 +0100 | [diff] [blame] | 289 | if (element.type != ACPI_TYPE_INTEGER) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | acpi_util_eval_error(handle, pathname, AE_BAD_DATA); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 291 | return AE_BAD_DATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | } |
| 293 | |
Pavel Machek | 4059907 | 2008-11-25 12:05:08 +0100 | [diff] [blame] | 294 | *data = element.integer.value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 296 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Return value [%llu]\n", *data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 298 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 301 | EXPORT_SYMBOL(acpi_evaluate_integer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 304 | acpi_evaluate_reference(acpi_handle handle, |
| 305 | acpi_string pathname, |
| 306 | struct acpi_object_list *arguments, |
| 307 | struct acpi_handle_list *list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 309 | acpi_status status = AE_OK; |
| 310 | union acpi_object *package = NULL; |
| 311 | union acpi_object *element = NULL; |
| 312 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 313 | u32 i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | if (!list) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 317 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | } |
| 319 | |
| 320 | /* Evaluate object. */ |
| 321 | |
| 322 | status = acpi_evaluate_object(handle, pathname, arguments, &buffer); |
| 323 | if (ACPI_FAILURE(status)) |
| 324 | goto end; |
| 325 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 326 | package = buffer.pointer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
| 328 | if ((buffer.length == 0) || !package) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | status = AE_BAD_DATA; |
| 330 | acpi_util_eval_error(handle, pathname, status); |
| 331 | goto end; |
| 332 | } |
| 333 | if (package->type != ACPI_TYPE_PACKAGE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | status = AE_BAD_DATA; |
| 335 | acpi_util_eval_error(handle, pathname, status); |
| 336 | goto end; |
| 337 | } |
| 338 | if (!package->package.count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | status = AE_BAD_DATA; |
| 340 | acpi_util_eval_error(handle, pathname, status); |
| 341 | goto end; |
| 342 | } |
| 343 | |
| 344 | if (package->package.count > ACPI_MAX_HANDLES) { |
Xiongfeng Wang | 09e1508 | 2017-11-09 14:22:39 +0800 | [diff] [blame] | 345 | kfree(package); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 346 | return AE_NO_MEMORY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | } |
| 348 | list->count = package->package.count; |
| 349 | |
| 350 | /* Extract package data. */ |
| 351 | |
| 352 | for (i = 0; i < list->count; i++) { |
| 353 | |
| 354 | element = &(package->package.elements[i]); |
| 355 | |
Bob Moore | cd0b224 | 2008-04-10 19:06:43 +0400 | [diff] [blame] | 356 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | status = AE_BAD_DATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | acpi_util_eval_error(handle, pathname, status); |
| 359 | break; |
| 360 | } |
| 361 | |
Thomas Renninger | b6a1638 | 2008-03-12 01:06:24 +0100 | [diff] [blame] | 362 | if (!element->reference.handle) { |
Thomas Renninger | b6a1638 | 2008-03-12 01:06:24 +0100 | [diff] [blame] | 363 | status = AE_NULL_ENTRY; |
Rafael J. Wysocki | c48cf1b | 2014-12-12 22:51:01 +0100 | [diff] [blame] | 364 | acpi_util_eval_error(handle, pathname, status); |
Thomas Renninger | b6a1638 | 2008-03-12 01:06:24 +0100 | [diff] [blame] | 365 | break; |
| 366 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | /* Get the acpi_handle. */ |
| 368 | |
| 369 | list->handles[i] = element->reference.handle; |
| 370 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found reference [%p]\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 371 | list->handles[i])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | } |
| 373 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 374 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | if (ACPI_FAILURE(status)) { |
| 376 | list->count = 0; |
| 377 | //kfree(list->handles); |
| 378 | } |
| 379 | |
Len Brown | 02438d8 | 2006-06-30 03:19:10 -0400 | [diff] [blame] | 380 | kfree(buffer.pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 382 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 385 | EXPORT_SYMBOL(acpi_evaluate_reference); |
Matthew Garrett | 38ac0f1 | 2012-05-11 16:08:26 +0800 | [diff] [blame] | 386 | |
| 387 | acpi_status |
Feng Tang | 8ede06a | 2012-08-21 09:56:58 +0800 | [diff] [blame] | 388 | acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld) |
Matthew Garrett | 38ac0f1 | 2012-05-11 16:08:26 +0800 | [diff] [blame] | 389 | { |
| 390 | acpi_status status; |
| 391 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 392 | union acpi_object *output; |
| 393 | |
| 394 | status = acpi_evaluate_object(handle, "_PLD", NULL, &buffer); |
| 395 | |
| 396 | if (ACPI_FAILURE(status)) |
| 397 | return status; |
| 398 | |
| 399 | output = buffer.pointer; |
| 400 | |
| 401 | if (!output || output->type != ACPI_TYPE_PACKAGE |
| 402 | || !output->package.count |
| 403 | || output->package.elements[0].type != ACPI_TYPE_BUFFER |
Feng Tang | 8ede06a | 2012-08-21 09:56:58 +0800 | [diff] [blame] | 404 | || output->package.elements[0].buffer.length < ACPI_PLD_REV1_BUFFER_SIZE) { |
Matthew Garrett | 38ac0f1 | 2012-05-11 16:08:26 +0800 | [diff] [blame] | 405 | status = AE_TYPE; |
| 406 | goto out; |
| 407 | } |
| 408 | |
Feng Tang | 8ede06a | 2012-08-21 09:56:58 +0800 | [diff] [blame] | 409 | status = acpi_decode_pld_buffer( |
| 410 | output->package.elements[0].buffer.pointer, |
| 411 | output->package.elements[0].buffer.length, |
| 412 | pld); |
| 413 | |
Matthew Garrett | 38ac0f1 | 2012-05-11 16:08:26 +0800 | [diff] [blame] | 414 | out: |
| 415 | kfree(buffer.pointer); |
| 416 | return status; |
| 417 | } |
| 418 | EXPORT_SYMBOL(acpi_get_physical_device_location); |
Toshi Kani | 275c58d | 2012-05-23 20:25:19 -0600 | [diff] [blame] | 419 | |
| 420 | /** |
Rafael J. Wysocki | 700b842 | 2014-02-21 01:07:17 +0100 | [diff] [blame] | 421 | * acpi_evaluate_ost: Evaluate _OST for hotplug operations |
Toshi Kani | 275c58d | 2012-05-23 20:25:19 -0600 | [diff] [blame] | 422 | * @handle: ACPI device handle |
| 423 | * @source_event: source event code |
| 424 | * @status_code: status code |
| 425 | * @status_buf: optional detailed information (NULL if none) |
| 426 | * |
| 427 | * Evaluate _OST for hotplug operations. All ACPI hotplug handlers |
| 428 | * must call this function when evaluating _OST for hotplug operations. |
| 429 | * When the platform does not support _OST, this function has no effect. |
| 430 | */ |
| 431 | acpi_status |
Jiang Liu | 05730c1 | 2014-02-19 14:02:15 +0800 | [diff] [blame] | 432 | acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code, |
| 433 | struct acpi_buffer *status_buf) |
Toshi Kani | 275c58d | 2012-05-23 20:25:19 -0600 | [diff] [blame] | 434 | { |
Toshi Kani | 275c58d | 2012-05-23 20:25:19 -0600 | [diff] [blame] | 435 | union acpi_object params[3] = { |
| 436 | {.type = ACPI_TYPE_INTEGER,}, |
| 437 | {.type = ACPI_TYPE_INTEGER,}, |
| 438 | {.type = ACPI_TYPE_BUFFER,} |
| 439 | }; |
| 440 | struct acpi_object_list arg_list = {3, params}; |
Toshi Kani | 275c58d | 2012-05-23 20:25:19 -0600 | [diff] [blame] | 441 | |
| 442 | params[0].integer.value = source_event; |
| 443 | params[1].integer.value = status_code; |
| 444 | if (status_buf != NULL) { |
| 445 | params[2].buffer.pointer = status_buf->pointer; |
| 446 | params[2].buffer.length = status_buf->length; |
| 447 | } else { |
| 448 | params[2].buffer.pointer = NULL; |
| 449 | params[2].buffer.length = 0; |
| 450 | } |
| 451 | |
Jiang Liu | 05730c1 | 2014-02-19 14:02:15 +0800 | [diff] [blame] | 452 | return acpi_evaluate_object(handle, "_OST", &arg_list, NULL); |
Toshi Kani | 275c58d | 2012-05-23 20:25:19 -0600 | [diff] [blame] | 453 | } |
Jiang Liu | 05730c1 | 2014-02-19 14:02:15 +0800 | [diff] [blame] | 454 | EXPORT_SYMBOL(acpi_evaluate_ost); |
Toshi Kani | fbfddae | 2012-11-21 01:36:28 +0000 | [diff] [blame] | 455 | |
| 456 | /** |
Bjørn Mork | 45fef5b | 2014-05-22 12:47:47 +0200 | [diff] [blame] | 457 | * acpi_handle_path: Return the object path of handle |
| 458 | * |
| 459 | * Caller must free the returned buffer |
| 460 | */ |
| 461 | static char *acpi_handle_path(acpi_handle handle) |
| 462 | { |
| 463 | struct acpi_buffer buffer = { |
| 464 | .length = ACPI_ALLOCATE_BUFFER, |
| 465 | .pointer = NULL |
| 466 | }; |
| 467 | |
| 468 | if (in_interrupt() || |
| 469 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer) != AE_OK) |
| 470 | return NULL; |
| 471 | return buffer.pointer; |
| 472 | } |
| 473 | |
| 474 | /** |
Toshi Kani | fbfddae | 2012-11-21 01:36:28 +0000 | [diff] [blame] | 475 | * acpi_handle_printk: Print message with ACPI prefix and object path |
| 476 | * |
| 477 | * This function is called through acpi_handle_<level> macros and prints |
| 478 | * a message with ACPI prefix and object path. This function acquires |
| 479 | * the global namespace mutex to obtain an object path. In interrupt |
| 480 | * context, it shows the object path as <n/a>. |
| 481 | */ |
| 482 | void |
| 483 | acpi_handle_printk(const char *level, acpi_handle handle, const char *fmt, ...) |
| 484 | { |
| 485 | struct va_format vaf; |
| 486 | va_list args; |
Toshi Kani | fbfddae | 2012-11-21 01:36:28 +0000 | [diff] [blame] | 487 | const char *path; |
| 488 | |
| 489 | va_start(args, fmt); |
| 490 | vaf.fmt = fmt; |
| 491 | vaf.va = &args; |
| 492 | |
Bjørn Mork | 45fef5b | 2014-05-22 12:47:47 +0200 | [diff] [blame] | 493 | path = acpi_handle_path(handle); |
| 494 | printk("%sACPI: %s: %pV", level, path ? path : "<n/a>" , &vaf); |
Toshi Kani | fbfddae | 2012-11-21 01:36:28 +0000 | [diff] [blame] | 495 | |
| 496 | va_end(args); |
Bjørn Mork | 45fef5b | 2014-05-22 12:47:47 +0200 | [diff] [blame] | 497 | kfree(path); |
Toshi Kani | fbfddae | 2012-11-21 01:36:28 +0000 | [diff] [blame] | 498 | } |
| 499 | EXPORT_SYMBOL(acpi_handle_printk); |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 500 | |
Bjørn Mork | 45fef5b | 2014-05-22 12:47:47 +0200 | [diff] [blame] | 501 | #if defined(CONFIG_DYNAMIC_DEBUG) |
| 502 | /** |
| 503 | * __acpi_handle_debug: pr_debug with ACPI prefix and object path |
| 504 | * |
| 505 | * This function is called through acpi_handle_debug macro and debug |
| 506 | * prints a message with ACPI prefix and object path. This function |
| 507 | * acquires the global namespace mutex to obtain an object path. In |
| 508 | * interrupt context, it shows the object path as <n/a>. |
| 509 | */ |
| 510 | void |
| 511 | __acpi_handle_debug(struct _ddebug *descriptor, acpi_handle handle, |
| 512 | const char *fmt, ...) |
| 513 | { |
| 514 | struct va_format vaf; |
| 515 | va_list args; |
| 516 | const char *path; |
| 517 | |
| 518 | va_start(args, fmt); |
| 519 | vaf.fmt = fmt; |
| 520 | vaf.va = &args; |
| 521 | |
| 522 | path = acpi_handle_path(handle); |
| 523 | __dynamic_pr_debug(descriptor, "ACPI: %s: %pV", path ? path : "<n/a>", &vaf); |
| 524 | |
| 525 | va_end(args); |
| 526 | kfree(path); |
| 527 | } |
| 528 | EXPORT_SYMBOL(__acpi_handle_debug); |
| 529 | #endif |
| 530 | |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 531 | /** |
| 532 | * acpi_has_method: Check whether @handle has a method named @name |
| 533 | * @handle: ACPI device handle |
| 534 | * @name: name of object or method |
| 535 | * |
| 536 | * Check whether @handle has a method named @name. |
| 537 | */ |
| 538 | bool acpi_has_method(acpi_handle handle, char *name) |
| 539 | { |
| 540 | acpi_handle tmp; |
| 541 | |
| 542 | return ACPI_SUCCESS(acpi_get_handle(handle, name, &tmp)); |
| 543 | } |
| 544 | EXPORT_SYMBOL(acpi_has_method); |
Jiang Liu | 0db9820 | 2013-06-29 00:24:39 +0800 | [diff] [blame] | 545 | |
| 546 | acpi_status acpi_execute_simple_method(acpi_handle handle, char *method, |
| 547 | u64 arg) |
| 548 | { |
| 549 | union acpi_object obj = { .type = ACPI_TYPE_INTEGER }; |
| 550 | struct acpi_object_list arg_list = { .count = 1, .pointer = &obj, }; |
| 551 | |
| 552 | obj.integer.value = arg; |
| 553 | |
| 554 | return acpi_evaluate_object(handle, method, &arg_list, NULL); |
| 555 | } |
| 556 | EXPORT_SYMBOL(acpi_execute_simple_method); |
Jiang Liu | 7d2421f | 2013-06-29 00:24:40 +0800 | [diff] [blame] | 557 | |
| 558 | /** |
| 559 | * acpi_evaluate_ej0: Evaluate _EJ0 method for hotplug operations |
| 560 | * @handle: ACPI device handle |
| 561 | * |
| 562 | * Evaluate device's _EJ0 method for hotplug operations. |
| 563 | */ |
| 564 | acpi_status acpi_evaluate_ej0(acpi_handle handle) |
| 565 | { |
| 566 | acpi_status status; |
| 567 | |
| 568 | status = acpi_execute_simple_method(handle, "_EJ0", 1); |
| 569 | if (status == AE_NOT_FOUND) |
| 570 | acpi_handle_warn(handle, "No _EJ0 support for device\n"); |
| 571 | else if (ACPI_FAILURE(status)) |
| 572 | acpi_handle_warn(handle, "Eject failed (0x%x)\n", status); |
| 573 | |
| 574 | return status; |
| 575 | } |
| 576 | |
| 577 | /** |
| 578 | * acpi_evaluate_lck: Evaluate _LCK method to lock/unlock device |
| 579 | * @handle: ACPI device handle |
| 580 | * @lock: lock device if non-zero, otherwise unlock device |
| 581 | * |
| 582 | * Evaluate device's _LCK method if present to lock/unlock device |
| 583 | */ |
| 584 | acpi_status acpi_evaluate_lck(acpi_handle handle, int lock) |
| 585 | { |
| 586 | acpi_status status; |
| 587 | |
| 588 | status = acpi_execute_simple_method(handle, "_LCK", !!lock); |
| 589 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 590 | if (lock) |
| 591 | acpi_handle_warn(handle, |
| 592 | "Locking device failed (0x%x)\n", status); |
| 593 | else |
| 594 | acpi_handle_warn(handle, |
| 595 | "Unlocking device failed (0x%x)\n", status); |
| 596 | } |
| 597 | |
| 598 | return status; |
| 599 | } |
Jiang Liu | a65ac52 | 2013-12-19 20:38:10 +0800 | [diff] [blame] | 600 | |
| 601 | /** |
| 602 | * acpi_evaluate_dsm - evaluate device's _DSM method |
| 603 | * @handle: ACPI device handle |
Andy Shevchenko | 94116f8 | 2017-06-05 19:40:46 +0300 | [diff] [blame] | 604 | * @guid: GUID of requested functions, should be 16 bytes |
Jiang Liu | a65ac52 | 2013-12-19 20:38:10 +0800 | [diff] [blame] | 605 | * @rev: revision number of requested function |
| 606 | * @func: requested function number |
| 607 | * @argv4: the function specific parameter |
| 608 | * |
Andy Shevchenko | 94116f8 | 2017-06-05 19:40:46 +0300 | [diff] [blame] | 609 | * Evaluate device's _DSM method with specified GUID, revision id and |
Jiang Liu | a65ac52 | 2013-12-19 20:38:10 +0800 | [diff] [blame] | 610 | * function number. Caller needs to free the returned object. |
| 611 | * |
| 612 | * Though ACPI defines the fourth parameter for _DSM should be a package, |
| 613 | * some old BIOSes do expect a buffer or an integer etc. |
| 614 | */ |
| 615 | union acpi_object * |
Andy Shevchenko | 94116f8 | 2017-06-05 19:40:46 +0300 | [diff] [blame] | 616 | acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 func, |
Jiang Liu | a65ac52 | 2013-12-19 20:38:10 +0800 | [diff] [blame] | 617 | union acpi_object *argv4) |
| 618 | { |
| 619 | acpi_status ret; |
| 620 | struct acpi_buffer buf = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 621 | union acpi_object params[4]; |
| 622 | struct acpi_object_list input = { |
| 623 | .count = 4, |
| 624 | .pointer = params, |
| 625 | }; |
| 626 | |
| 627 | params[0].type = ACPI_TYPE_BUFFER; |
| 628 | params[0].buffer.length = 16; |
Andy Shevchenko | 94116f8 | 2017-06-05 19:40:46 +0300 | [diff] [blame] | 629 | params[0].buffer.pointer = (u8 *)guid; |
Jiang Liu | a65ac52 | 2013-12-19 20:38:10 +0800 | [diff] [blame] | 630 | params[1].type = ACPI_TYPE_INTEGER; |
| 631 | params[1].integer.value = rev; |
| 632 | params[2].type = ACPI_TYPE_INTEGER; |
| 633 | params[2].integer.value = func; |
| 634 | if (argv4) { |
| 635 | params[3] = *argv4; |
| 636 | } else { |
| 637 | params[3].type = ACPI_TYPE_PACKAGE; |
| 638 | params[3].package.count = 0; |
| 639 | params[3].package.elements = NULL; |
| 640 | } |
| 641 | |
| 642 | ret = acpi_evaluate_object(handle, "_DSM", &input, &buf); |
| 643 | if (ACPI_SUCCESS(ret)) |
| 644 | return (union acpi_object *)buf.pointer; |
| 645 | |
| 646 | if (ret != AE_NOT_FOUND) |
| 647 | acpi_handle_warn(handle, |
| 648 | "failed to evaluate _DSM (0x%x)\n", ret); |
| 649 | |
| 650 | return NULL; |
| 651 | } |
| 652 | EXPORT_SYMBOL(acpi_evaluate_dsm); |
| 653 | |
| 654 | /** |
| 655 | * acpi_check_dsm - check if _DSM method supports requested functions. |
| 656 | * @handle: ACPI device handle |
Andy Shevchenko | 94116f8 | 2017-06-05 19:40:46 +0300 | [diff] [blame] | 657 | * @guid: GUID of requested functions, should be 16 bytes at least |
Jiang Liu | a65ac52 | 2013-12-19 20:38:10 +0800 | [diff] [blame] | 658 | * @rev: revision number of requested functions |
| 659 | * @funcs: bitmap of requested functions |
Jiang Liu | a65ac52 | 2013-12-19 20:38:10 +0800 | [diff] [blame] | 660 | * |
| 661 | * Evaluate device's _DSM method to check whether it supports requested |
| 662 | * functions. Currently only support 64 functions at maximum, should be |
| 663 | * enough for now. |
| 664 | */ |
Andy Shevchenko | 94116f8 | 2017-06-05 19:40:46 +0300 | [diff] [blame] | 665 | bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs) |
Jiang Liu | a65ac52 | 2013-12-19 20:38:10 +0800 | [diff] [blame] | 666 | { |
| 667 | int i; |
| 668 | u64 mask = 0; |
| 669 | union acpi_object *obj; |
| 670 | |
Dan Williams | a722559 | 2016-07-19 12:32:39 -0700 | [diff] [blame] | 671 | if (funcs == 0) |
| 672 | return false; |
| 673 | |
Andy Shevchenko | 94116f8 | 2017-06-05 19:40:46 +0300 | [diff] [blame] | 674 | obj = acpi_evaluate_dsm(handle, guid, rev, 0, NULL); |
Jiang Liu | a65ac52 | 2013-12-19 20:38:10 +0800 | [diff] [blame] | 675 | if (!obj) |
| 676 | return false; |
| 677 | |
| 678 | /* For compatibility, old BIOSes may return an integer */ |
| 679 | if (obj->type == ACPI_TYPE_INTEGER) |
| 680 | mask = obj->integer.value; |
| 681 | else if (obj->type == ACPI_TYPE_BUFFER) |
| 682 | for (i = 0; i < obj->buffer.length && i < 8; i++) |
Colin Ian King | 4a798f5 | 2016-03-18 15:08:01 +0000 | [diff] [blame] | 683 | mask |= (((u64)obj->buffer.pointer[i]) << (i * 8)); |
Jiang Liu | a65ac52 | 2013-12-19 20:38:10 +0800 | [diff] [blame] | 684 | ACPI_FREE(obj); |
| 685 | |
| 686 | /* |
| 687 | * Bit 0 indicates whether there's support for any functions other than |
Andy Shevchenko | 94116f8 | 2017-06-05 19:40:46 +0300 | [diff] [blame] | 688 | * function 0 for the specified GUID and revision. |
Jiang Liu | a65ac52 | 2013-12-19 20:38:10 +0800 | [diff] [blame] | 689 | */ |
| 690 | if ((mask & 0x1) && (mask & funcs) == funcs) |
| 691 | return true; |
| 692 | |
| 693 | return false; |
| 694 | } |
| 695 | EXPORT_SYMBOL(acpi_check_dsm); |
Hans de Goede | 14ca7a47 | 2015-06-16 16:27:47 +0200 | [diff] [blame] | 696 | |
Lukas Wunner | 2d12b6b | 2015-11-25 21:19:55 +0100 | [diff] [blame] | 697 | /** |
Lukas Wunner | c68ae33e | 2016-03-24 13:15:20 +0100 | [diff] [blame] | 698 | * acpi_dev_found - Detect presence of a given ACPI device in the namespace. |
Lukas Wunner | 2d12b6b | 2015-11-25 21:19:55 +0100 | [diff] [blame] | 699 | * @hid: Hardware ID of the device. |
| 700 | * |
| 701 | * Return %true if the device was present at the moment of invocation. |
| 702 | * Note that if the device is pluggable, it may since have disappeared. |
| 703 | * |
| 704 | * For this function to work, acpi_bus_scan() must have been executed |
| 705 | * which happens in the subsys_initcall() subsection. Hence, do not |
| 706 | * call from a subsys_initcall() or earlier (use acpi_get_devices() |
| 707 | * instead). Calling from module_init() is fine (which is synonymous |
| 708 | * with device_initcall()). |
| 709 | */ |
Lukas Wunner | c68ae33e | 2016-03-24 13:15:20 +0100 | [diff] [blame] | 710 | bool acpi_dev_found(const char *hid) |
Lukas Wunner | 2d12b6b | 2015-11-25 21:19:55 +0100 | [diff] [blame] | 711 | { |
| 712 | struct acpi_device_bus_id *acpi_device_bus_id; |
| 713 | bool found = false; |
| 714 | |
| 715 | mutex_lock(&acpi_device_lock); |
| 716 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) |
| 717 | if (!strcmp(acpi_device_bus_id->bus_id, hid)) { |
| 718 | found = true; |
| 719 | break; |
| 720 | } |
| 721 | mutex_unlock(&acpi_device_lock); |
| 722 | |
| 723 | return found; |
| 724 | } |
Lukas Wunner | c68ae33e | 2016-03-24 13:15:20 +0100 | [diff] [blame] | 725 | EXPORT_SYMBOL(acpi_dev_found); |
Lukas Wunner | 2d12b6b | 2015-11-25 21:19:55 +0100 | [diff] [blame] | 726 | |
Andy Shevchenko | 67dcf8a | 2018-01-05 18:09:33 +0200 | [diff] [blame] | 727 | struct acpi_dev_match_info { |
| 728 | const char *dev_name; |
Andy Shevchenko | 817b4d6 | 2019-03-18 23:00:54 +0300 | [diff] [blame] | 729 | struct acpi_device *adev; |
Hans de Goede | 8661423 | 2017-04-19 14:02:08 +0200 | [diff] [blame] | 730 | struct acpi_device_id hid[2]; |
| 731 | const char *uid; |
| 732 | s64 hrv; |
| 733 | }; |
| 734 | |
Andy Shevchenko | 67dcf8a | 2018-01-05 18:09:33 +0200 | [diff] [blame] | 735 | static int acpi_dev_match_cb(struct device *dev, void *data) |
Hans de Goede | 8661423 | 2017-04-19 14:02:08 +0200 | [diff] [blame] | 736 | { |
| 737 | struct acpi_device *adev = to_acpi_device(dev); |
Andy Shevchenko | 67dcf8a | 2018-01-05 18:09:33 +0200 | [diff] [blame] | 738 | struct acpi_dev_match_info *match = data; |
Hans de Goede | 8661423 | 2017-04-19 14:02:08 +0200 | [diff] [blame] | 739 | unsigned long long hrv; |
| 740 | acpi_status status; |
| 741 | |
| 742 | if (acpi_match_device_ids(adev, match->hid)) |
| 743 | return 0; |
| 744 | |
| 745 | if (match->uid && (!adev->pnp.unique_id || |
| 746 | strcmp(adev->pnp.unique_id, match->uid))) |
| 747 | return 0; |
| 748 | |
Andy Shevchenko | 67dcf8a | 2018-01-05 18:09:33 +0200 | [diff] [blame] | 749 | match->dev_name = acpi_dev_name(adev); |
Andy Shevchenko | 817b4d6 | 2019-03-18 23:00:54 +0300 | [diff] [blame] | 750 | match->adev = adev; |
Andy Shevchenko | 67dcf8a | 2018-01-05 18:09:33 +0200 | [diff] [blame] | 751 | |
Hans de Goede | 8661423 | 2017-04-19 14:02:08 +0200 | [diff] [blame] | 752 | if (match->hrv == -1) |
| 753 | return 1; |
| 754 | |
| 755 | status = acpi_evaluate_integer(adev->handle, "_HRV", NULL, &hrv); |
| 756 | if (ACPI_FAILURE(status)) |
| 757 | return 0; |
| 758 | |
| 759 | return hrv == match->hrv; |
| 760 | } |
| 761 | |
| 762 | /** |
| 763 | * acpi_dev_present - Detect that a given ACPI device is present |
| 764 | * @hid: Hardware ID of the device. |
| 765 | * @uid: Unique ID of the device, pass NULL to not check _UID |
| 766 | * @hrv: Hardware Revision of the device, pass -1 to not check _HRV |
| 767 | * |
| 768 | * Return %true if a matching device was present at the moment of invocation. |
| 769 | * Note that if the device is pluggable, it may since have disappeared. |
| 770 | * |
| 771 | * Note that unlike acpi_dev_found() this function checks the status |
| 772 | * of the device. So for devices which are present in the dsdt, but |
| 773 | * which are disabled (their _STA callback returns 0) this function |
| 774 | * will return false. |
| 775 | * |
| 776 | * For this function to work, acpi_bus_scan() must have been executed |
| 777 | * which happens in the subsys_initcall() subsection. Hence, do not |
| 778 | * call from a subsys_initcall() or earlier (use acpi_get_devices() |
| 779 | * instead). Calling from module_init() is fine (which is synonymous |
| 780 | * with device_initcall()). |
| 781 | */ |
| 782 | bool acpi_dev_present(const char *hid, const char *uid, s64 hrv) |
| 783 | { |
Andy Shevchenko | 67dcf8a | 2018-01-05 18:09:33 +0200 | [diff] [blame] | 784 | struct acpi_dev_match_info match = {}; |
Hans de Goede | 8661423 | 2017-04-19 14:02:08 +0200 | [diff] [blame] | 785 | struct device *dev; |
| 786 | |
| 787 | strlcpy(match.hid[0].id, hid, sizeof(match.hid[0].id)); |
| 788 | match.uid = uid; |
| 789 | match.hrv = hrv; |
| 790 | |
Andy Shevchenko | 67dcf8a | 2018-01-05 18:09:33 +0200 | [diff] [blame] | 791 | dev = bus_find_device(&acpi_bus_type, NULL, &match, acpi_dev_match_cb); |
Andy Shevchenko | 54e3aca | 2019-03-18 21:47:09 +0300 | [diff] [blame] | 792 | put_device(dev); |
Hans de Goede | 8661423 | 2017-04-19 14:02:08 +0200 | [diff] [blame] | 793 | return !!dev; |
| 794 | } |
| 795 | EXPORT_SYMBOL(acpi_dev_present); |
| 796 | |
Andy Shevchenko | 67dcf8a | 2018-01-05 18:09:33 +0200 | [diff] [blame] | 797 | /** |
Andy Shevchenko | 817b4d6 | 2019-03-18 23:00:54 +0300 | [diff] [blame] | 798 | * acpi_dev_get_first_match_dev - Return the first match of ACPI device |
Andy Shevchenko | 67dcf8a | 2018-01-05 18:09:33 +0200 | [diff] [blame] | 799 | * @hid: Hardware ID of the device. |
| 800 | * @uid: Unique ID of the device, pass NULL to not check _UID |
| 801 | * @hrv: Hardware Revision of the device, pass -1 to not check _HRV |
| 802 | * |
Andy Shevchenko | 817b4d6 | 2019-03-18 23:00:54 +0300 | [diff] [blame] | 803 | * Return the first match of ACPI device if a matching device was present |
Andy Shevchenko | 67dcf8a | 2018-01-05 18:09:33 +0200 | [diff] [blame] | 804 | * at the moment of invocation, or NULL otherwise. |
| 805 | * |
Andy Shevchenko | 817b4d6 | 2019-03-18 23:00:54 +0300 | [diff] [blame] | 806 | * The caller is responsible to call put_device() on the returned device. |
| 807 | * |
Andy Shevchenko | 67dcf8a | 2018-01-05 18:09:33 +0200 | [diff] [blame] | 808 | * See additional information in acpi_dev_present() as well. |
| 809 | */ |
Andy Shevchenko | 817b4d6 | 2019-03-18 23:00:54 +0300 | [diff] [blame] | 810 | struct acpi_device * |
| 811 | acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv) |
| 812 | { |
| 813 | struct acpi_dev_match_info match = {}; |
| 814 | struct device *dev; |
| 815 | |
| 816 | strlcpy(match.hid[0].id, hid, sizeof(match.hid[0].id)); |
| 817 | match.uid = uid; |
| 818 | match.hrv = hrv; |
| 819 | |
| 820 | dev = bus_find_device(&acpi_bus_type, NULL, &match, acpi_dev_match_cb); |
| 821 | return dev ? match.adev : NULL; |
| 822 | } |
| 823 | EXPORT_SYMBOL(acpi_dev_get_first_match_dev); |
| 824 | |
Hans de Goede | 14ca7a47 | 2015-06-16 16:27:47 +0200 | [diff] [blame] | 825 | /* |
| 826 | * acpi_backlight= handling, this is done here rather then in video_detect.c |
| 827 | * because __setup cannot be used in modules. |
| 828 | */ |
| 829 | char acpi_video_backlight_string[16]; |
| 830 | EXPORT_SYMBOL(acpi_video_backlight_string); |
| 831 | |
| 832 | static int __init acpi_backlight(char *str) |
| 833 | { |
| 834 | strlcpy(acpi_video_backlight_string, str, |
| 835 | sizeof(acpi_video_backlight_string)); |
| 836 | return 1; |
| 837 | } |
| 838 | __setup("acpi_backlight=", acpi_backlight); |
Toshi Kani | 5aa5911 | 2017-08-23 16:54:43 -0600 | [diff] [blame] | 839 | |
| 840 | /** |
| 841 | * acpi_match_platform_list - Check if the system matches with a given list |
| 842 | * @plat: pointer to acpi_platform_list table terminated by a NULL entry |
| 843 | * |
| 844 | * Return the matched index if the system is found in the platform list. |
| 845 | * Otherwise, return a negative error code. |
| 846 | */ |
| 847 | int acpi_match_platform_list(const struct acpi_platform_list *plat) |
| 848 | { |
| 849 | struct acpi_table_header hdr; |
| 850 | int idx = 0; |
| 851 | |
| 852 | if (acpi_disabled) |
| 853 | return -ENODEV; |
| 854 | |
| 855 | for (; plat->oem_id[0]; plat++, idx++) { |
| 856 | if (ACPI_FAILURE(acpi_get_table_header(plat->table, 0, &hdr))) |
| 857 | continue; |
| 858 | |
| 859 | if (strncmp(plat->oem_id, hdr.oem_id, ACPI_OEM_ID_SIZE)) |
| 860 | continue; |
| 861 | |
| 862 | if (strncmp(plat->oem_table_id, hdr.oem_table_id, ACPI_OEM_TABLE_ID_SIZE)) |
| 863 | continue; |
| 864 | |
| 865 | if ((plat->pred == all_versions) || |
| 866 | (plat->pred == less_than_or_equal && hdr.oem_revision <= plat->oem_revision) || |
| 867 | (plat->pred == greater_than_or_equal && hdr.oem_revision >= plat->oem_revision) || |
| 868 | (plat->pred == equal && hdr.oem_revision == plat->oem_revision)) |
| 869 | return idx; |
| 870 | } |
| 871 | |
| 872 | return -ENODEV; |
| 873 | } |
| 874 | EXPORT_SYMBOL(acpi_match_platform_list); |