drivers/acpi/acpica/utaddress.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utaddress - op_region address range check
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2016, 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/acpi.h>
  45 #include "accommon.h"
  46 #include "acnamesp.h"
  47
  48 #define _COMPONENT          ACPI_UTILITIES
  49 ACPI_MODULE_NAME("utaddress")
  50
  51 /*******************************************************************************
  52  *
  53  * FUNCTION:    acpi_ut_add_address_range
  54  *
  55  * PARAMETERS:  space_id            - Address space ID
  56  *              address             - op_region start address
  57  *              length              - op_region length
  58  *              region_node         - op_region namespace node
  59  *
  60  * RETURN:      Status
  61  *
  62  * DESCRIPTION: Add the Operation Region address range to the global list.
  63  *              The only supported Space IDs are Memory and I/O. Called when
  64  *              the op_region address/length operands are fully evaluated.
  65  *
  66  * MUTEX:       Locks the namespace
  67  *
  68  * NOTE: Because this interface is only called when an op_region argument
  69  * list is evaluated, there cannot be any duplicate region_nodes.
  70  * Duplicate Address/Length values are allowed, however, so that multiple
  71  * address conflicts can be detected.
  72  *
  73  ******************************************************************************/
  74 acpi_status
  75 acpi_ut_add_address_range(acpi_adr_space_type space_id,
  76                           acpi_physical_address address,
  77                           u32 length, struct acpi_namespace_node *region_node)
  78 {
  79         struct acpi_address_range *range_info;
  80
  81         ACPI_FUNCTION_TRACE(ut_add_address_range);
  82
  83         if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
  84             (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
  85                 return_ACPI_STATUS(AE_OK);
  86         }
  87
  88         /* Allocate/init a new info block, add it to the appropriate list */
  89
  90         range_info = ACPI_ALLOCATE(sizeof(struct acpi_address_range));
  91         if (!range_info) {
  92                 return_ACPI_STATUS(AE_NO_MEMORY);
  93         }
  94
  95         range_info->start_address = address;
  96         range_info->end_address = (address + length - 1);
  97         range_info->region_node = region_node;
  98
  99         range_info->next = acpi_gbl_address_range_list[space_id];
 100         acpi_gbl_address_range_list[space_id] = range_info;
 101
 102         ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
 103                           "\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
 104                           acpi_ut_get_node_name(range_info->region_node),
 105                           ACPI_FORMAT_UINT64(address),
 106                           ACPI_FORMAT_UINT64(range_info->end_address)));
 107
 108         return_ACPI_STATUS(AE_OK);
 109 }
 110
 111 /*******************************************************************************
 112  *
 113  * FUNCTION:    acpi_ut_remove_address_range
 114  *
 115  * PARAMETERS:  space_id            - Address space ID
 116  *              region_node         - op_region namespace node
 117  *
 118  * RETURN:      None
 119  *
 120  * DESCRIPTION: Remove the Operation Region from the global list. The only
 121  *              supported Space IDs are Memory and I/O. Called when an
 122  *              op_region is deleted.
 123  *
 124  * MUTEX:       Assumes the namespace is locked
 125  *
 126  ******************************************************************************/
 127
 128 void
 129 acpi_ut_remove_address_range(acpi_adr_space_type space_id,
 130                              struct acpi_namespace_node *region_node)
 131 {
 132         struct acpi_address_range *range_info;
 133         struct acpi_address_range *prev;
 134
 135         ACPI_FUNCTION_TRACE(ut_remove_address_range);
 136
 137         if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
 138             (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
 139                 return_VOID;
 140         }
 141
 142         /* Get the appropriate list head and check the list */
 143
 144         range_info = prev = acpi_gbl_address_range_list[space_id];
 145         while (range_info) {
 146                 if (range_info->region_node == region_node) {
 147                         if (range_info == prev) {       /* Found at list head */
 148                                 acpi_gbl_address_range_list[space_id] =
 149                                     range_info->next;
 150                         } else {
 151                                 prev->next = range_info->next;
 152                         }
 153
 154                         ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
 155                                           "\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
 156                                           acpi_ut_get_node_name(range_info->
 157                                                                 region_node),
 158                                           ACPI_FORMAT_UINT64(range_info->
 159                                                              start_address),
 160                                           ACPI_FORMAT_UINT64(range_info->
 161                                                              end_address)));
 162
 163                         ACPI_FREE(range_info);
 164                         return_VOID;
 165                 }
 166
 167                 prev = range_info;
 168                 range_info = range_info->next;
 169         }
 170
 171         return_VOID;
 172 }
 173
 174 /*******************************************************************************
 175  *
 176  * FUNCTION:    acpi_ut_check_address_range
 177  *
 178  * PARAMETERS:  space_id            - Address space ID
 179  *              address             - Start address
 180  *              length              - Length of address range
 181  *              warn                - TRUE if warning on overlap desired
 182  *
 183  * RETURN:      Count of the number of conflicts detected. Zero is always
 184  *              returned for Space IDs other than Memory or I/O.
 185  *
 186  * DESCRIPTION: Check if the input address range overlaps any of the
 187  *              ASL operation region address ranges. The only supported
 188  *              Space IDs are Memory and I/O.
 189  *
 190  * MUTEX:       Assumes the namespace is locked.
 191  *
 192  ******************************************************************************/
 193
 194 u32
 195 acpi_ut_check_address_range(acpi_adr_space_type space_id,
 196                             acpi_physical_address address, u32 length, u8 warn)
 197 {
 198         struct acpi_address_range *range_info;
 199         acpi_physical_address end_address;
 200         char *pathname;
 201         u32 overlap_count = 0;
 202
 203         ACPI_FUNCTION_TRACE(ut_check_address_range);
 204
 205         if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
 206             (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
 207                 return_UINT32(0);
 208         }
 209
 210         range_info = acpi_gbl_address_range_list[space_id];
 211         end_address = address + length - 1;
 212
 213         /* Check entire list for all possible conflicts */
 214
 215         while (range_info) {
 216                 /*
 217                  * Check if the requested address/length overlaps this
 218                  * address range. There are four cases to consider:
 219                  *
 220                  * 1) Input address/length is contained completely in the
 221                  *    address range
 222                  * 2) Input address/length overlaps range at the range start
 223                  * 3) Input address/length overlaps range at the range end
 224                  * 4) Input address/length completely encompasses the range
 225                  */
 226                 if ((address <= range_info->end_address) &&
 227                     (end_address >= range_info->start_address)) {
 228
 229                         /* Found an address range overlap */
 230
 231                         overlap_count++;
 232                         if (warn) {     /* Optional warning message */
 233                                 pathname =
 234                                     acpi_ns_get_normalized_pathname(range_info->
 235                                                                     region_node,
 236                                                                     TRUE);
 237
 238                                 ACPI_WARNING((AE_INFO,
 239                                               "%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)",
 240                                               acpi_ut_get_region_name(space_id),
 241                                               ACPI_FORMAT_UINT64(address),
 242                                               ACPI_FORMAT_UINT64(end_address),
 243                                               ACPI_FORMAT_UINT64(range_info->
 244                                                                  start_address),
 245                                               ACPI_FORMAT_UINT64(range_info->
 246                                                                  end_address),
 247                                               pathname));
 248                                 ACPI_FREE(pathname);
 249                         }
 250                 }
 251
 252                 range_info = range_info->next;
 253         }
 254
 255         return_UINT32(overlap_count);
 256 }
 257
 258 /*******************************************************************************
 259  *
 260  * FUNCTION:    acpi_ut_delete_address_lists
 261  *
 262  * PARAMETERS:  None
 263  *
 264  * RETURN:      None
 265  *
 266  * DESCRIPTION: Delete all global address range lists (called during
 267  *              subsystem shutdown).
 268  *
 269  ******************************************************************************/
 270
 271 void acpi_ut_delete_address_lists(void)
 272 {
 273         struct acpi_address_range *next;
 274         struct acpi_address_range *range_info;
 275         int i;
 276
 277         /* Delete all elements in all address range lists */
 278
 279         for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++) {
 280                 next = acpi_gbl_address_range_list[i];
 281
 282                 while (next) {
 283                         range_info = next;
 284                         next = range_info->next;
 285                         ACPI_FREE(range_info);
 286                 }
 287
 288                 acpi_gbl_address_range_list[i] = NULL;
 289         }
 290 }