drivers/bus/acpi/acpica/resources/rsio.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: rsio - IO and DMA resource descriptors
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2017, Intel Corp.
   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
  44 #include "acpi.h"
  45 #include "accommon.h"
  46 #include "acresrc.h"
  47
  48 #define _COMPONENT          ACPI_RESOURCES
  49         ACPI_MODULE_NAME    ("rsio")
  50
  51
  52 /*******************************************************************************
  53  *
  54  * AcpiRsConvertIo
  55  *
  56  ******************************************************************************/
  57
  58 ACPI_RSCONVERT_INFO     AcpiRsConvertIo[5] =
  59 {
  60     {ACPI_RSC_INITGET,  ACPI_RESOURCE_TYPE_IO,
  61                         ACPI_RS_SIZE (ACPI_RESOURCE_IO),
  62                         ACPI_RSC_TABLE_SIZE (AcpiRsConvertIo)},
  63
  64     {ACPI_RSC_INITSET,  ACPI_RESOURCE_NAME_IO,
  65                         sizeof (AML_RESOURCE_IO),
  66                         0},
  67
  68     /* Decode flag */
  69
  70     {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET (Data.Io.IoDecode),
  71                         AML_OFFSET (Io.Flags),
  72                         0},
  73     /*
  74      * These fields are contiguous in both the source and destination:
  75      * Address Alignment
  76      * Length
  77      * Minimum Base Address
  78      * Maximum Base Address
  79      */
  80     {ACPI_RSC_MOVE8,    ACPI_RS_OFFSET (Data.Io.Alignment),
  81                         AML_OFFSET (Io.Alignment),
  82                         2},
  83
  84     {ACPI_RSC_MOVE16,   ACPI_RS_OFFSET (Data.Io.Minimum),
  85                         AML_OFFSET (Io.Minimum),
  86                         2}
  87 };
  88
  89
  90 /*******************************************************************************
  91  *
  92  * AcpiRsConvertFixedIo
  93  *
  94  ******************************************************************************/
  95
  96 ACPI_RSCONVERT_INFO     AcpiRsConvertFixedIo[4] =
  97 {
  98     {ACPI_RSC_INITGET,  ACPI_RESOURCE_TYPE_FIXED_IO,
  99                         ACPI_RS_SIZE (ACPI_RESOURCE_FIXED_IO),
 100                         ACPI_RSC_TABLE_SIZE (AcpiRsConvertFixedIo)},
 101
 102     {ACPI_RSC_INITSET,  ACPI_RESOURCE_NAME_FIXED_IO,
 103                         sizeof (AML_RESOURCE_FIXED_IO),
 104                         0},
 105     /*
 106      * These fields are contiguous in both the source and destination:
 107      * Base Address
 108      * Length
 109      */
 110     {ACPI_RSC_MOVE8,    ACPI_RS_OFFSET (Data.FixedIo.AddressLength),
 111                         AML_OFFSET (FixedIo.AddressLength),
 112                         1},
 113
 114     {ACPI_RSC_MOVE16,   ACPI_RS_OFFSET (Data.FixedIo.Address),
 115                         AML_OFFSET (FixedIo.Address),
 116                         1}
 117 };
 118
 119
 120 /*******************************************************************************
 121  *
 122  * AcpiRsConvertGenericReg
 123  *
 124  ******************************************************************************/
 125
 126 ACPI_RSCONVERT_INFO     AcpiRsConvertGenericReg[4] =
 127 {
 128     {ACPI_RSC_INITGET,  ACPI_RESOURCE_TYPE_GENERIC_REGISTER,
 129                         ACPI_RS_SIZE (ACPI_RESOURCE_GENERIC_REGISTER),
 130                         ACPI_RSC_TABLE_SIZE (AcpiRsConvertGenericReg)},
 131
 132     {ACPI_RSC_INITSET,  ACPI_RESOURCE_NAME_GENERIC_REGISTER,
 133                         sizeof (AML_RESOURCE_GENERIC_REGISTER),
 134                         0},
 135     /*
 136      * These fields are contiguous in both the source and destination:
 137      * Address Space ID
 138      * Register Bit Width
 139      * Register Bit Offset
 140      * Access Size
 141      */
 142     {ACPI_RSC_MOVE8,    ACPI_RS_OFFSET (Data.GenericReg.SpaceId),
 143                         AML_OFFSET (GenericReg.AddressSpaceId),
 144                         4},
 145
 146     /* Get the Register Address */
 147
 148     {ACPI_RSC_MOVE64,   ACPI_RS_OFFSET (Data.GenericReg.Address),
 149                         AML_OFFSET (GenericReg.Address),
 150                         1}
 151 };
 152
 153
 154 /*******************************************************************************
 155  *
 156  * AcpiRsConvertEndDpf
 157  *
 158  ******************************************************************************/
 159
 160 ACPI_RSCONVERT_INFO   AcpiRsConvertEndDpf[2] =
 161 {
 162     {ACPI_RSC_INITGET,  ACPI_RESOURCE_TYPE_END_DEPENDENT,
 163                         ACPI_RS_SIZE_MIN,
 164                         ACPI_RSC_TABLE_SIZE (AcpiRsConvertEndDpf)},
 165
 166     {ACPI_RSC_INITSET,  ACPI_RESOURCE_NAME_END_DEPENDENT,
 167                         sizeof (AML_RESOURCE_END_DEPENDENT),
 168                         0}
 169 };
 170
 171
 172 /*******************************************************************************
 173  *
 174  * AcpiRsConvertEndTag
 175  *
 176  ******************************************************************************/
 177
 178 ACPI_RSCONVERT_INFO   AcpiRsConvertEndTag[2] =
 179 {
 180     {ACPI_RSC_INITGET,  ACPI_RESOURCE_TYPE_END_TAG,
 181                         ACPI_RS_SIZE_MIN,
 182                         ACPI_RSC_TABLE_SIZE (AcpiRsConvertEndTag)},
 183
 184     /*
 185      * Note: The checksum field is set to zero, meaning that the resource
 186      * data is treated as if the checksum operation succeeded.
 187      * (ACPI Spec 1.0b Section 6.4.2.8)
 188      */
 189     {ACPI_RSC_INITSET,  ACPI_RESOURCE_NAME_END_TAG,
 190                         sizeof (AML_RESOURCE_END_TAG),
 191                         0}
 192 };
 193
 194
 195 /*******************************************************************************
 196  *
 197  * AcpiRsGetStartDpf
 198  *
 199  ******************************************************************************/
 200
 201 ACPI_RSCONVERT_INFO   AcpiRsGetStartDpf[6] =
 202 {
 203     {ACPI_RSC_INITGET,  ACPI_RESOURCE_TYPE_START_DEPENDENT,
 204                         ACPI_RS_SIZE (ACPI_RESOURCE_START_DEPENDENT),
 205                         ACPI_RSC_TABLE_SIZE (AcpiRsGetStartDpf)},
 206
 207     /* Defaults for Compatibility and Performance priorities */
 208
 209     {ACPI_RSC_SET8,     ACPI_RS_OFFSET (Data.StartDpf.CompatibilityPriority),
 210                         ACPI_ACCEPTABLE_CONFIGURATION,
 211                         2},
 212
 213     /* Get the descriptor length (0 or 1 for Start Dpf descriptor) */
 214
 215     {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET (Data.StartDpf.DescriptorLength),
 216                         AML_OFFSET (StartDpf.DescriptorType),
 217                         0},
 218
 219     /* All done if there is no flag byte present in the descriptor */
 220
 221     {ACPI_RSC_EXIT_NE,  ACPI_RSC_COMPARE_AML_LENGTH, 0, 1},
 222
 223     /* Flag byte is present, get the flags */
 224
 225     {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET (Data.StartDpf.CompatibilityPriority),
 226                         AML_OFFSET (StartDpf.Flags),
 227                         0},
 228
 229     {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET (Data.StartDpf.PerformanceRobustness),
 230                         AML_OFFSET (StartDpf.Flags),
 231                         2}
 232 };
 233
 234
 235 /*******************************************************************************
 236  *
 237  * AcpiRsSetStartDpf
 238  *
 239  ******************************************************************************/
 240
 241 ACPI_RSCONVERT_INFO   AcpiRsSetStartDpf[10] =
 242 {
 243     /* Start with a default descriptor of length 1 */
 244
 245     {ACPI_RSC_INITSET,  ACPI_RESOURCE_NAME_START_DEPENDENT,
 246                         sizeof (AML_RESOURCE_START_DEPENDENT),
 247                         ACPI_RSC_TABLE_SIZE (AcpiRsSetStartDpf)},
 248
 249     /* Set the default flag values */
 250
 251     {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET (Data.StartDpf.CompatibilityPriority),
 252                         AML_OFFSET (StartDpf.Flags),
 253                         0},
 254
 255     {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET (Data.StartDpf.PerformanceRobustness),
 256                         AML_OFFSET (StartDpf.Flags),
 257                         2},
 258     /*
 259      * All done if the output descriptor length is required to be 1
 260      * (i.e., optimization to 0 bytes cannot be attempted)
 261      */
 262     {ACPI_RSC_EXIT_EQ,  ACPI_RSC_COMPARE_VALUE,
 263                         ACPI_RS_OFFSET(Data.StartDpf.DescriptorLength),
 264                         1},
 265
 266     /* Set length to 0 bytes (no flags byte) */
 267
 268     {ACPI_RSC_LENGTH,   0, 0, sizeof (AML_RESOURCE_START_DEPENDENT_NOPRIO)},
 269
 270     /*
 271      * All done if the output descriptor length is required to be 0.
 272      *
 273      * TBD: Perhaps we should check for error if input flags are not
 274      * compatible with a 0-byte descriptor.
 275      */
 276     {ACPI_RSC_EXIT_EQ,  ACPI_RSC_COMPARE_VALUE,
 277                         ACPI_RS_OFFSET(Data.StartDpf.DescriptorLength),
 278                         0},
 279
 280     /* Reset length to 1 byte (descriptor with flags byte) */
 281
 282     {ACPI_RSC_LENGTH,   0, 0, sizeof (AML_RESOURCE_START_DEPENDENT)},
 283
 284
 285     /*
 286      * All done if flags byte is necessary -- if either priority value
 287      * is not ACPI_ACCEPTABLE_CONFIGURATION
 288      */
 289     {ACPI_RSC_EXIT_NE,  ACPI_RSC_COMPARE_VALUE,
 290                         ACPI_RS_OFFSET (Data.StartDpf.CompatibilityPriority),
 291                         ACPI_ACCEPTABLE_CONFIGURATION},
 292
 293     {ACPI_RSC_EXIT_NE,  ACPI_RSC_COMPARE_VALUE,
 294                         ACPI_RS_OFFSET (Data.StartDpf.PerformanceRobustness),
 295                         ACPI_ACCEPTABLE_CONFIGURATION},
 296
 297     /* Flag byte is not necessary */
 298
 299     {ACPI_RSC_LENGTH,   0, 0, sizeof (AML_RESOURCE_START_DEPENDENT_NOPRIO)}
 300 };