drivers/bus/acpi/acpica/utilities/utaddress.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utaddress - OpRegion address range check
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2018, 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 "acnamesp.h"
  47
  48
  49 #define _COMPONENT          ACPI_UTILITIES
  50         ACPI_MODULE_NAME    ("utaddress")
  51
  52
  53 /*******************************************************************************
  54  *
  55  * FUNCTION:    AcpiUtAddAddressRange
  56  *
  57  * PARAMETERS:  SpaceId             - Address space ID
  58  *              Address             - OpRegion start address
  59  *              Length              - OpRegion length
  60  *              RegionNode          - OpRegion namespace node
  61  *
  62  * RETURN:      Status
  63  *
  64  * DESCRIPTION: Add the Operation Region address range to the global list.
  65  *              The only supported Space IDs are Memory and I/O. Called when
  66  *              the OpRegion address/length operands are fully evaluated.
  67  *
  68  * MUTEX:       Locks the namespace
  69  *
  70  * NOTE: Because this interface is only called when an OpRegion argument
  71  * list is evaluated, there cannot be any duplicate RegionNodes.
  72  * Duplicate Address/Length values are allowed, however, so that multiple
  73  * address conflicts can be detected.
  74  *
  75  ******************************************************************************/
  76
  77 ACPI_STATUS
  78 AcpiUtAddAddressRange (
  79     ACPI_ADR_SPACE_TYPE     SpaceId,
  80     ACPI_PHYSICAL_ADDRESS   Address,
  81     UINT32                  Length,
  82     ACPI_NAMESPACE_NODE     *RegionNode)
  83 {
  84     ACPI_ADDRESS_RANGE      *RangeInfo;
  85
  86
  87     ACPI_FUNCTION_TRACE (UtAddAddressRange);
  88
  89
  90     if ((SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
  91         (SpaceId != ACPI_ADR_SPACE_SYSTEM_IO))
  92     {
  93         return_ACPI_STATUS (AE_OK);
  94     }
  95
  96     /* Allocate/init a new info block, add it to the appropriate list */
  97
  98     RangeInfo = ACPI_ALLOCATE (sizeof (ACPI_ADDRESS_RANGE));
  99     if (!RangeInfo)
 100     {
 101         return_ACPI_STATUS (AE_NO_MEMORY);
 102     }
 103
 104     RangeInfo->StartAddress = Address;
 105     RangeInfo->EndAddress = (Address + Length - 1);
 106     RangeInfo->RegionNode = RegionNode;
 107
 108     RangeInfo->Next = AcpiGbl_AddressRangeList[SpaceId];
 109     AcpiGbl_AddressRangeList[SpaceId] = RangeInfo;
 110
 111     ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
 112         "\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
 113         AcpiUtGetNodeName (RangeInfo->RegionNode),
 114         ACPI_FORMAT_UINT64 (Address),
 115         ACPI_FORMAT_UINT64 (RangeInfo->EndAddress)));
 116
 117     return_ACPI_STATUS (AE_OK);
 118 }
 119
 120
 121 /*******************************************************************************
 122  *
 123  * FUNCTION:    AcpiUtRemoveAddressRange
 124  *
 125  * PARAMETERS:  SpaceId             - Address space ID
 126  *              RegionNode          - OpRegion namespace node
 127  *
 128  * RETURN:      None
 129  *
 130  * DESCRIPTION: Remove the Operation Region from the global list. The only
 131  *              supported Space IDs are Memory and I/O. Called when an
 132  *              OpRegion is deleted.
 133  *
 134  * MUTEX:       Assumes the namespace is locked
 135  *
 136  ******************************************************************************/
 137
 138 void
 139 AcpiUtRemoveAddressRange (
 140     ACPI_ADR_SPACE_TYPE     SpaceId,
 141     ACPI_NAMESPACE_NODE     *RegionNode)
 142 {
 143     ACPI_ADDRESS_RANGE      *RangeInfo;
 144     ACPI_ADDRESS_RANGE      *Prev;
 145
 146
 147     ACPI_FUNCTION_TRACE (UtRemoveAddressRange);
 148
 149
 150     if ((SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
 151         (SpaceId != ACPI_ADR_SPACE_SYSTEM_IO))
 152     {
 153         return_VOID;
 154     }
 155
 156     /* Get the appropriate list head and check the list */
 157
 158     RangeInfo = Prev = AcpiGbl_AddressRangeList[SpaceId];
 159     while (RangeInfo)
 160     {
 161         if (RangeInfo->RegionNode == RegionNode)
 162         {
 163             if (RangeInfo == Prev) /* Found at list head */
 164             {
 165                 AcpiGbl_AddressRangeList[SpaceId] = RangeInfo->Next;
 166             }
 167             else
 168             {
 169                 Prev->Next = RangeInfo->Next;
 170             }
 171
 172             ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
 173                 "\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
 174                 AcpiUtGetNodeName (RangeInfo->RegionNode),
 175                 ACPI_FORMAT_UINT64 (RangeInfo->StartAddress),
 176                 ACPI_FORMAT_UINT64 (RangeInfo->EndAddress)));
 177
 178             ACPI_FREE (RangeInfo);
 179             return_VOID;
 180         }
 181
 182         Prev = RangeInfo;
 183         RangeInfo = RangeInfo->Next;
 184     }
 185
 186     return_VOID;
 187 }
 188
 189
 190 /*******************************************************************************
 191  *
 192  * FUNCTION:    AcpiUtCheckAddressRange
 193  *
 194  * PARAMETERS:  SpaceId             - Address space ID
 195  *              Address             - Start address
 196  *              Length              - Length of address range
 197  *              Warn                - TRUE if warning on overlap desired
 198  *
 199  * RETURN:      Count of the number of conflicts detected. Zero is always
 200  *              returned for Space IDs other than Memory or I/O.
 201  *
 202  * DESCRIPTION: Check if the input address range overlaps any of the
 203  *              ASL operation region address ranges. The only supported
 204  *              Space IDs are Memory and I/O.
 205  *
 206  * MUTEX:       Assumes the namespace is locked.
 207  *
 208  ******************************************************************************/
 209
 210 UINT32
 211 AcpiUtCheckAddressRange (
 212     ACPI_ADR_SPACE_TYPE     SpaceId,
 213     ACPI_PHYSICAL_ADDRESS   Address,
 214     UINT32                  Length,
 215     BOOLEAN                 Warn)
 216 {
 217     ACPI_ADDRESS_RANGE      *RangeInfo;
 218     ACPI_PHYSICAL_ADDRESS   EndAddress;
 219     char                    *Pathname;
 220     UINT32                  OverlapCount = 0;
 221
 222
 223     ACPI_FUNCTION_TRACE (UtCheckAddressRange);
 224
 225
 226     if ((SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
 227         (SpaceId != ACPI_ADR_SPACE_SYSTEM_IO))
 228     {
 229         return_UINT32 (0);
 230     }
 231
 232     RangeInfo = AcpiGbl_AddressRangeList[SpaceId];
 233     EndAddress = Address + Length - 1;
 234
 235     /* Check entire list for all possible conflicts */
 236
 237     while (RangeInfo)
 238     {
 239         /*
 240          * Check if the requested address/length overlaps this
 241          * address range. There are four cases to consider:
 242          *
 243          * 1) Input address/length is contained completely in the
 244          *    address range
 245          * 2) Input address/length overlaps range at the range start
 246          * 3) Input address/length overlaps range at the range end
 247          * 4) Input address/length completely encompasses the range
 248          */
 249         if ((Address <= RangeInfo->EndAddress) &&
 250             (EndAddress >= RangeInfo->StartAddress))
 251         {
 252             /* Found an address range overlap */
 253
 254             OverlapCount++;
 255             if (Warn)   /* Optional warning message */
 256             {
 257                 Pathname = AcpiNsGetNormalizedPathname (RangeInfo->RegionNode, TRUE);
 258
 259                 ACPI_WARNING ((AE_INFO,
 260                     "%s range 0x%8.8X%8.8X-0x%8.8X%8.8X conflicts with OpRegion 0x%8.8X%8.8X-0x%8.8X%8.8X (%s)",
 261                     AcpiUtGetRegionName (SpaceId),
 262                     ACPI_FORMAT_UINT64 (Address),
 263                     ACPI_FORMAT_UINT64 (EndAddress),
 264                     ACPI_FORMAT_UINT64 (RangeInfo->StartAddress),
 265                     ACPI_FORMAT_UINT64 (RangeInfo->EndAddress),
 266                     Pathname));
 267                 ACPI_FREE (Pathname);
 268             }
 269         }
 270
 271         RangeInfo = RangeInfo->Next;
 272     }
 273
 274     return_UINT32 (OverlapCount);
 275 }
 276
 277
 278 /*******************************************************************************
 279  *
 280  * FUNCTION:    AcpiUtDeleteAddressLists
 281  *
 282  * PARAMETERS:  None
 283  *
 284  * RETURN:      None
 285  *
 286  * DESCRIPTION: Delete all global address range lists (called during
 287  *              subsystem shutdown).
 288  *
 289  ******************************************************************************/
 290
 291 void
 292 AcpiUtDeleteAddressLists (
 293     void)
 294 {
 295     ACPI_ADDRESS_RANGE      *Next;
 296     ACPI_ADDRESS_RANGE      *RangeInfo;
 297     int                     i;
 298
 299
 300     /* Delete all elements in all address range lists */
 301
 302     for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++)
 303     {
 304         Next = AcpiGbl_AddressRangeList[i];
 305
 306         while (Next)
 307         {
 308             RangeInfo = Next;
 309             Next = RangeInfo->Next;
 310             ACPI_FREE (RangeInfo);
 311         }
 312
 313         AcpiGbl_AddressRangeList[i] = NULL;
 314     }
 315 }