Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: exfield - ACPI AML (p-code) execution - field manipulation |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | fbb7a2d | 2014-02-08 09:42:25 +0800 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2014, Intel Corp. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <acpi/acpi.h> |
Len Brown | e2f7a77 | 2009-01-09 00:30:03 -0500 | [diff] [blame] | 45 | #include "accommon.h" |
| 46 | #include "acdispat.h" |
| 47 | #include "acinterp.h" |
Lv Zheng | 6273f00 | 2014-04-16 21:24:34 +0800 | [diff] [blame] | 48 | #include "amlcode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #define _COMPONENT ACPI_EXECUTER |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 51 | ACPI_MODULE_NAME("exfield") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Lv Zheng | 6273f00 | 2014-04-16 21:24:34 +0800 | [diff] [blame] | 53 | /* Local prototypes */ |
| 54 | static u32 |
| 55 | acpi_ex_get_serial_access_length(u32 accessor_type, u32 access_length); |
| 56 | |
| 57 | /******************************************************************************* |
| 58 | * |
Lv Zheng | c046912 | 2014-07-08 10:08:05 +0800 | [diff] [blame] | 59 | * FUNCTION: acpi_ex_get_serial_access_length |
Lv Zheng | 6273f00 | 2014-04-16 21:24:34 +0800 | [diff] [blame] | 60 | * |
| 61 | * PARAMETERS: accessor_type - The type of the protocol indicated by region |
| 62 | * field access attributes |
| 63 | * access_length - The access length of the region field |
| 64 | * |
| 65 | * RETURN: Decoded access length |
| 66 | * |
| 67 | * DESCRIPTION: This routine returns the length of the generic_serial_bus |
| 68 | * protocol bytes |
| 69 | * |
| 70 | ******************************************************************************/ |
| 71 | |
| 72 | static u32 |
| 73 | acpi_ex_get_serial_access_length(u32 accessor_type, u32 access_length) |
| 74 | { |
| 75 | u32 length; |
| 76 | |
| 77 | switch (accessor_type) { |
| 78 | case AML_FIELD_ATTRIB_QUICK: |
| 79 | |
| 80 | length = 0; |
| 81 | break; |
| 82 | |
| 83 | case AML_FIELD_ATTRIB_SEND_RCV: |
| 84 | case AML_FIELD_ATTRIB_BYTE: |
| 85 | |
| 86 | length = 1; |
| 87 | break; |
| 88 | |
| 89 | case AML_FIELD_ATTRIB_WORD: |
| 90 | case AML_FIELD_ATTRIB_WORD_CALL: |
| 91 | |
| 92 | length = 2; |
| 93 | break; |
| 94 | |
| 95 | case AML_FIELD_ATTRIB_MULTIBYTE: |
| 96 | case AML_FIELD_ATTRIB_RAW_BYTES: |
| 97 | case AML_FIELD_ATTRIB_RAW_PROCESS: |
| 98 | |
| 99 | length = access_length; |
| 100 | break; |
| 101 | |
| 102 | case AML_FIELD_ATTRIB_BLOCK: |
| 103 | case AML_FIELD_ATTRIB_BLOCK_CALL: |
| 104 | default: |
| 105 | |
Lv Zheng | c046912 | 2014-07-08 10:08:05 +0800 | [diff] [blame] | 106 | length = ACPI_GSBUS_BUFFER_SIZE - 2; |
Lv Zheng | 6273f00 | 2014-04-16 21:24:34 +0800 | [diff] [blame] | 107 | break; |
| 108 | } |
| 109 | |
| 110 | return (length); |
| 111 | } |
| 112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | /******************************************************************************* |
| 114 | * |
| 115 | * FUNCTION: acpi_ex_read_data_from_field |
| 116 | * |
| 117 | * PARAMETERS: walk_state - Current execution state |
| 118 | * obj_desc - The named field |
| 119 | * ret_buffer_desc - Where the return data object is stored |
| 120 | * |
| 121 | * RETURN: Status |
| 122 | * |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 123 | * DESCRIPTION: Read from a named field. Returns either an Integer or a |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | * Buffer, depending on the size of the field. |
| 125 | * |
| 126 | ******************************************************************************/ |
Lv Zheng | 6273f00 | 2014-04-16 21:24:34 +0800 | [diff] [blame] | 127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | acpi_status |
Lv Zheng | 6273f00 | 2014-04-16 21:24:34 +0800 | [diff] [blame] | 129 | acpi_ex_read_data_from_field(struct acpi_walk_state * walk_state, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 130 | union acpi_operand_object *obj_desc, |
| 131 | union acpi_operand_object **ret_buffer_desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 133 | acpi_status status; |
| 134 | union acpi_operand_object *buffer_desc; |
| 135 | acpi_size length; |
| 136 | void *buffer; |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 137 | u32 function; |
Lv Zheng | 6273f00 | 2014-04-16 21:24:34 +0800 | [diff] [blame] | 138 | u16 accessor_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 140 | ACPI_FUNCTION_TRACE_PTR(ex_read_data_from_field, obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
| 142 | /* Parameter validation */ |
| 143 | |
| 144 | if (!obj_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 145 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | } |
Robert Moore | 88ac00f | 2005-05-26 00:00:00 -0400 | [diff] [blame] | 147 | if (!ret_buffer_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 148 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Robert Moore | 88ac00f | 2005-05-26 00:00:00 -0400 | [diff] [blame] | 149 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 151 | if (obj_desc->common.type == ACPI_TYPE_BUFFER_FIELD) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | /* |
| 153 | * If the buffer_field arguments have not been previously evaluated, |
| 154 | * evaluate them now and save the results. |
| 155 | */ |
| 156 | if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 157 | status = acpi_ds_get_buffer_field_arguments(obj_desc); |
| 158 | if (ACPI_FAILURE(status)) { |
| 159 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | } |
| 161 | } |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 162 | } else if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) && |
| 163 | (obj_desc->field.region_obj->region.space_id == |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 164 | ACPI_ADR_SPACE_SMBUS |
| 165 | || obj_desc->field.region_obj->region.space_id == |
Bob Moore | 2da120b | 2011-11-16 14:14:32 +0800 | [diff] [blame] | 166 | ACPI_ADR_SPACE_GSBUS |
| 167 | || obj_desc->field.region_obj->region.space_id == |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 168 | ACPI_ADR_SPACE_IPMI)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | /* |
Bob Moore | 2da120b | 2011-11-16 14:14:32 +0800 | [diff] [blame] | 170 | * This is an SMBus, GSBus or IPMI read. We must create a buffer to hold |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 171 | * the data and then directly access the region handler. |
| 172 | * |
Bob Moore | 2da120b | 2011-11-16 14:14:32 +0800 | [diff] [blame] | 173 | * Note: SMBus and GSBus protocol value is passed in upper 16-bits of Function |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | */ |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 175 | if (obj_desc->field.region_obj->region.space_id == |
| 176 | ACPI_ADR_SPACE_SMBUS) { |
| 177 | length = ACPI_SMBUS_BUFFER_SIZE; |
| 178 | function = |
| 179 | ACPI_READ | (obj_desc->field.attribute << 16); |
Bob Moore | 2da120b | 2011-11-16 14:14:32 +0800 | [diff] [blame] | 180 | } else if (obj_desc->field.region_obj->region.space_id == |
| 181 | ACPI_ADR_SPACE_GSBUS) { |
Lv Zheng | 6273f00 | 2014-04-16 21:24:34 +0800 | [diff] [blame] | 182 | accessor_type = obj_desc->field.attribute; |
| 183 | length = acpi_ex_get_serial_access_length(accessor_type, |
| 184 | obj_desc-> |
| 185 | field. |
| 186 | access_length); |
| 187 | |
| 188 | /* |
Bob Moore | d38bb00 | 2014-07-30 12:20:46 +0800 | [diff] [blame] | 189 | * Add additional 2 bytes for the generic_serial_bus data buffer: |
| 190 | * |
| 191 | * Status; (Byte 0 of the data buffer) |
| 192 | * Length; (Byte 1 of the data buffer) |
| 193 | * Data[x-1]; (Bytes 2-x of the arbitrary length data buffer) |
Lv Zheng | 6273f00 | 2014-04-16 21:24:34 +0800 | [diff] [blame] | 194 | */ |
| 195 | length += 2; |
| 196 | function = ACPI_READ | (accessor_type << 16); |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 197 | } else { /* IPMI */ |
| 198 | |
| 199 | length = ACPI_IPMI_BUFFER_SIZE; |
| 200 | function = ACPI_READ; |
| 201 | } |
| 202 | |
| 203 | buffer_desc = acpi_ut_create_buffer_object(length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | if (!buffer_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 205 | return_ACPI_STATUS(AE_NO_MEMORY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | /* Lock entire transaction if requested */ |
| 209 | |
Bob Moore | ba886cd | 2008-04-10 19:06:37 +0400 | [diff] [blame] | 210 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 212 | /* Call the region handler for the read */ |
| 213 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 214 | status = acpi_ex_access_region(obj_desc, 0, |
Bob Moore | 5df7e6c | 2010-01-21 10:06:32 +0800 | [diff] [blame] | 215 | ACPI_CAST_PTR(u64, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 216 | buffer_desc-> |
| 217 | buffer.pointer), |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 218 | function); |
Bob Moore | f02e9fa | 2008-04-10 19:06:37 +0400 | [diff] [blame] | 219 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | goto exit; |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Allocate a buffer for the contents of the field. |
| 225 | * |
Bob Moore | 5df7e6c | 2010-01-21 10:06:32 +0800 | [diff] [blame] | 226 | * If the field is larger than the current integer width, create |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 227 | * a BUFFER to hold it. Otherwise, use an INTEGER. This allows |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | * the use of arithmetic operators on the returned value if the |
| 229 | * field size is equal or smaller than an Integer. |
| 230 | * |
| 231 | * Note: Field.length is in bits. |
| 232 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 233 | length = |
| 234 | (acpi_size) ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->field.bit_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | if (length > acpi_gbl_integer_byte_width) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | /* Field is too large for an Integer, create a Buffer instead */ |
| 238 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 239 | buffer_desc = acpi_ut_create_buffer_object(length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | if (!buffer_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 241 | return_ACPI_STATUS(AE_NO_MEMORY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | } |
| 243 | buffer = buffer_desc->buffer.pointer; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 244 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | /* Field will fit within an Integer (normal case) */ |
| 246 | |
Bob Moore | dc95a27 | 2009-11-12 09:52:45 +0800 | [diff] [blame] | 247 | buffer_desc = acpi_ut_create_integer_object((u64) 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | if (!buffer_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 249 | return_ACPI_STATUS(AE_NO_MEMORY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | length = acpi_gbl_integer_byte_width; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | buffer = &buffer_desc->integer.value; |
| 254 | } |
| 255 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 256 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 257 | "FieldRead [TO]: Obj %p, Type %X, Buf %p, ByteLen %X\n", |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 258 | obj_desc, obj_desc->common.type, buffer, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 259 | (u32) length)); |
| 260 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 261 | "FieldRead [FROM]: BitLen %X, BitOff %X, ByteOff %X\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 262 | obj_desc->common_field.bit_length, |
| 263 | obj_desc->common_field.start_field_bit_offset, |
| 264 | obj_desc->common_field.base_byte_offset)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
| 266 | /* Lock entire transaction if requested */ |
| 267 | |
Bob Moore | ba886cd | 2008-04-10 19:06:37 +0400 | [diff] [blame] | 268 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
| 270 | /* Read from the field */ |
| 271 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 272 | status = acpi_ex_extract_from_field(obj_desc, buffer, (u32) length); |
Bob Moore | f02e9fa | 2008-04-10 19:06:37 +0400 | [diff] [blame] | 273 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
Lv Zheng | 10622bf | 2013-10-29 09:30:02 +0800 | [diff] [blame] | 275 | exit: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 276 | if (ACPI_FAILURE(status)) { |
| 277 | acpi_ut_remove_reference(buffer_desc); |
| 278 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | *ret_buffer_desc = buffer_desc; |
| 280 | } |
| 281 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 282 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | } |
| 284 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | /******************************************************************************* |
| 286 | * |
| 287 | * FUNCTION: acpi_ex_write_data_to_field |
| 288 | * |
| 289 | * PARAMETERS: source_desc - Contains data to write |
| 290 | * obj_desc - The named field |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 291 | * result_desc - Where the return value is returned, if any |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | * |
| 293 | * RETURN: Status |
| 294 | * |
| 295 | * DESCRIPTION: Write to a named field |
| 296 | * |
| 297 | ******************************************************************************/ |
| 298 | |
| 299 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 300 | acpi_ex_write_data_to_field(union acpi_operand_object *source_desc, |
| 301 | union acpi_operand_object *obj_desc, |
| 302 | union acpi_operand_object **result_desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 304 | acpi_status status; |
| 305 | u32 length; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 306 | void *buffer; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 307 | union acpi_operand_object *buffer_desc; |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 308 | u32 function; |
Lv Zheng | 6273f00 | 2014-04-16 21:24:34 +0800 | [diff] [blame] | 309 | u16 accessor_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 311 | ACPI_FUNCTION_TRACE_PTR(ex_write_data_to_field, obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
| 313 | /* Parameter validation */ |
| 314 | |
| 315 | if (!source_desc || !obj_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 316 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | } |
| 318 | |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 319 | if (obj_desc->common.type == ACPI_TYPE_BUFFER_FIELD) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | /* |
| 321 | * If the buffer_field arguments have not been previously evaluated, |
| 322 | * evaluate them now and save the results. |
| 323 | */ |
| 324 | if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 325 | status = acpi_ds_get_buffer_field_arguments(obj_desc); |
| 326 | if (ACPI_FAILURE(status)) { |
| 327 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | } |
| 329 | } |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 330 | } else if ((obj_desc->common.type == ACPI_TYPE_LOCAL_REGION_FIELD) && |
| 331 | (obj_desc->field.region_obj->region.space_id == |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 332 | ACPI_ADR_SPACE_SMBUS |
| 333 | || obj_desc->field.region_obj->region.space_id == |
Bob Moore | 2da120b | 2011-11-16 14:14:32 +0800 | [diff] [blame] | 334 | ACPI_ADR_SPACE_GSBUS |
| 335 | || obj_desc->field.region_obj->region.space_id == |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 336 | ACPI_ADR_SPACE_IPMI)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | /* |
Bob Moore | 2da120b | 2011-11-16 14:14:32 +0800 | [diff] [blame] | 338 | * This is an SMBus, GSBus or IPMI write. We will bypass the entire field |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 339 | * mechanism and handoff the buffer directly to the handler. For |
| 340 | * these address spaces, the buffer is bi-directional; on a write, |
| 341 | * return data is returned in the same buffer. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | * |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 343 | * Source must be a buffer of sufficient size: |
Bob Moore | 2da120b | 2011-11-16 14:14:32 +0800 | [diff] [blame] | 344 | * ACPI_SMBUS_BUFFER_SIZE, ACPI_GSBUS_BUFFER_SIZE, or ACPI_IPMI_BUFFER_SIZE. |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 345 | * |
Bob Moore | 2da120b | 2011-11-16 14:14:32 +0800 | [diff] [blame] | 346 | * Note: SMBus and GSBus protocol type is passed in upper 16-bits of Function |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | */ |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 348 | if (source_desc->common.type != ACPI_TYPE_BUFFER) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 349 | ACPI_ERROR((AE_INFO, |
Bob Moore | 2da120b | 2011-11-16 14:14:32 +0800 | [diff] [blame] | 350 | "SMBus/IPMI/GenericSerialBus write requires Buffer, found type %s", |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 351 | acpi_ut_get_object_type_name(source_desc))); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 352 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 353 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
| 355 | |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 356 | if (obj_desc->field.region_obj->region.space_id == |
| 357 | ACPI_ADR_SPACE_SMBUS) { |
| 358 | length = ACPI_SMBUS_BUFFER_SIZE; |
| 359 | function = |
| 360 | ACPI_WRITE | (obj_desc->field.attribute << 16); |
Bob Moore | 2da120b | 2011-11-16 14:14:32 +0800 | [diff] [blame] | 361 | } else if (obj_desc->field.region_obj->region.space_id == |
| 362 | ACPI_ADR_SPACE_GSBUS) { |
Lv Zheng | 6273f00 | 2014-04-16 21:24:34 +0800 | [diff] [blame] | 363 | accessor_type = obj_desc->field.attribute; |
| 364 | length = acpi_ex_get_serial_access_length(accessor_type, |
| 365 | obj_desc-> |
| 366 | field. |
| 367 | access_length); |
| 368 | |
| 369 | /* |
Bob Moore | d38bb00 | 2014-07-30 12:20:46 +0800 | [diff] [blame] | 370 | * Add additional 2 bytes for the generic_serial_bus data buffer: |
| 371 | * |
| 372 | * Status; (Byte 0 of the data buffer) |
| 373 | * Length; (Byte 1 of the data buffer) |
| 374 | * Data[x-1]; (Bytes 2-x of the arbitrary length data buffer) |
Lv Zheng | 6273f00 | 2014-04-16 21:24:34 +0800 | [diff] [blame] | 375 | */ |
| 376 | length += 2; |
| 377 | function = ACPI_WRITE | (accessor_type << 16); |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 378 | } else { /* IPMI */ |
| 379 | |
| 380 | length = ACPI_IPMI_BUFFER_SIZE; |
| 381 | function = ACPI_WRITE; |
| 382 | } |
| 383 | |
| 384 | if (source_desc->buffer.length < length) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 385 | ACPI_ERROR((AE_INFO, |
Bob Moore | 2da120b | 2011-11-16 14:14:32 +0800 | [diff] [blame] | 386 | "SMBus/IPMI/GenericSerialBus write requires Buffer of length %u, found length %u", |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 387 | length, source_desc->buffer.length)); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 388 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 389 | return_ACPI_STATUS(AE_AML_BUFFER_LIMIT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
| 391 | |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 392 | /* Create the bi-directional buffer */ |
| 393 | |
| 394 | buffer_desc = acpi_ut_create_buffer_object(length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | if (!buffer_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 396 | return_ACPI_STATUS(AE_NO_MEMORY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | buffer = buffer_desc->buffer.pointer; |
Lin Ming | 6557a49 | 2009-06-24 11:32:04 +0800 | [diff] [blame] | 400 | ACPI_MEMCPY(buffer, source_desc->buffer.pointer, length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
| 402 | /* Lock entire transaction if requested */ |
| 403 | |
Bob Moore | ba886cd | 2008-04-10 19:06:37 +0400 | [diff] [blame] | 404 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
| 406 | /* |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 407 | * Perform the write (returns status and perhaps data in the |
| 408 | * same buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 410 | status = acpi_ex_access_region(obj_desc, 0, |
Bob Moore | 5df7e6c | 2010-01-21 10:06:32 +0800 | [diff] [blame] | 411 | (u64 *) buffer, function); |
Bob Moore | f02e9fa | 2008-04-10 19:06:37 +0400 | [diff] [blame] | 412 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | |
| 414 | *result_desc = buffer_desc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 415 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
| 417 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 418 | /* Get a pointer to the data to be written */ |
| 419 | |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 420 | switch (source_desc->common.type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | case ACPI_TYPE_INTEGER: |
Chao Guan | 1d1ea1b | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 422 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | buffer = &source_desc->integer.value; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 424 | length = sizeof(source_desc->integer.value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | break; |
| 426 | |
| 427 | case ACPI_TYPE_BUFFER: |
Chao Guan | 1d1ea1b | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | buffer = source_desc->buffer.pointer; |
| 430 | length = source_desc->buffer.length; |
| 431 | break; |
| 432 | |
| 433 | case ACPI_TYPE_STRING: |
Chao Guan | 1d1ea1b | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 434 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | buffer = source_desc->string.pointer; |
| 436 | length = source_desc->string.length; |
| 437 | break; |
| 438 | |
| 439 | default: |
Chao Guan | 1d1ea1b | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 440 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 441 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | } |
| 443 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 444 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 445 | "FieldWrite [FROM]: Obj %p (%s:%X), Buf %p, ByteLen %X\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 446 | source_desc, |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 447 | acpi_ut_get_type_name(source_desc->common.type), |
| 448 | source_desc->common.type, buffer, length)); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 449 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 450 | ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 451 | "FieldWrite [TO]: Obj %p (%s:%X), BitLen %X, BitOff %X, ByteOff %X\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 452 | obj_desc, |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 453 | acpi_ut_get_type_name(obj_desc->common.type), |
| 454 | obj_desc->common.type, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 455 | obj_desc->common_field.bit_length, |
| 456 | obj_desc->common_field.start_field_bit_offset, |
| 457 | obj_desc->common_field.base_byte_offset)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
| 459 | /* Lock entire transaction if requested */ |
| 460 | |
Bob Moore | ba886cd | 2008-04-10 19:06:37 +0400 | [diff] [blame] | 461 | acpi_ex_acquire_global_lock(obj_desc->common_field.field_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
| 463 | /* Write to the field */ |
| 464 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 465 | status = acpi_ex_insert_into_field(obj_desc, buffer, length); |
Bob Moore | f02e9fa | 2008-04-10 19:06:37 +0400 | [diff] [blame] | 466 | acpi_ex_release_global_lock(obj_desc->common_field.field_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 468 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | } |