Branch data     Line data    Source code

       1                 :            : // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
       2                 :            : /******************************************************************************
       3                 :            :  *
       4                 :            :  * Module Name: utaddress - op_region address range check
       5                 :            :  *
       6                 :            :  * Copyright (C) 2000 - 2020, Intel Corp.
       7                 :            :  *
       8                 :            :  *****************************************************************************/
       9                 :            : 
      10                 :            : #include <acpi/acpi.h>
      11                 :            : #include "accommon.h"
      12                 :            : #include "acnamesp.h"
      13                 :            : 
      14                 :            : #define _COMPONENT          ACPI_UTILITIES
      15                 :            : ACPI_MODULE_NAME("utaddress")
      16                 :            : 
      17                 :            : /*******************************************************************************
      18                 :            :  *
      19                 :            :  * FUNCTION:    acpi_ut_add_address_range
      20                 :            :  *
      21                 :            :  * PARAMETERS:  space_id            - Address space ID
      22                 :            :  *              address             - op_region start address
      23                 :            :  *              length              - op_region length
      24                 :            :  *              region_node         - op_region namespace node
      25                 :            :  *
      26                 :            :  * RETURN:      Status
      27                 :            :  *
      28                 :            :  * DESCRIPTION: Add the Operation Region address range to the global list.
      29                 :            :  *              The only supported Space IDs are Memory and I/O. Called when
      30                 :            :  *              the op_region address/length operands are fully evaluated.
      31                 :            :  *
      32                 :            :  * MUTEX:       Locks the namespace
      33                 :            :  *
      34                 :            :  * NOTE: Because this interface is only called when an op_region argument
      35                 :            :  * list is evaluated, there cannot be any duplicate region_nodes.
      36                 :            :  * Duplicate Address/Length values are allowed, however, so that multiple
      37                 :            :  * address conflicts can be detected.
      38                 :            :  *
      39                 :            :  ******************************************************************************/
      40                 :            : acpi_status
      41                 :         24 : acpi_ut_add_address_range(acpi_adr_space_type space_id,
      42                 :            :                           acpi_physical_address address,
      43                 :            :                           u32 length, struct acpi_namespace_node *region_node)
      44                 :            : {
      45                 :         24 :         struct acpi_address_range *range_info;
      46                 :            : 
      47                 :         24 :         ACPI_FUNCTION_TRACE(ut_add_address_range);
      48                 :            : 
      49         [ +  + ]:         24 :         if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
      50                 :            :             (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
      51                 :            :                 return_ACPI_STATUS(AE_OK);
      52                 :            :         }
      53                 :            : 
      54                 :            :         /* Allocate/init a new info block, add it to the appropriate list */
      55                 :            : 
      56                 :         18 :         range_info = ACPI_ALLOCATE(sizeof(struct acpi_address_range));
      57         [ +  - ]:         18 :         if (!range_info) {
      58                 :            :                 return_ACPI_STATUS(AE_NO_MEMORY);
      59                 :            :         }
      60                 :            : 
      61                 :         18 :         range_info->start_address = address;
      62                 :         18 :         range_info->end_address = (address + length - 1);
      63                 :         18 :         range_info->region_node = region_node;
      64                 :            : 
      65                 :         18 :         range_info->next = acpi_gbl_address_range_list[space_id];
      66                 :         18 :         acpi_gbl_address_range_list[space_id] = range_info;
      67                 :            : 
      68                 :            :         ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
      69                 :            :                           "\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
      70                 :            :                           acpi_ut_get_node_name(range_info->region_node),
      71                 :            :                           ACPI_FORMAT_UINT64(address),
      72                 :         18 :                           ACPI_FORMAT_UINT64(range_info->end_address)));
      73                 :            : 
      74                 :         18 :         return_ACPI_STATUS(AE_OK);
      75                 :            : }
      76                 :            : 
      77                 :            : /*******************************************************************************
      78                 :            :  *
      79                 :            :  * FUNCTION:    acpi_ut_remove_address_range
      80                 :            :  *
      81                 :            :  * PARAMETERS:  space_id            - Address space ID
      82                 :            :  *              region_node         - op_region namespace node
      83                 :            :  *
      84                 :            :  * RETURN:      None
      85                 :            :  *
      86                 :            :  * DESCRIPTION: Remove the Operation Region from the global list. The only
      87                 :            :  *              supported Space IDs are Memory and I/O. Called when an
      88                 :            :  *              op_region is deleted.
      89                 :            :  *
      90                 :            :  * MUTEX:       Assumes the namespace is locked
      91                 :            :  *
      92                 :            :  ******************************************************************************/
      93                 :            : 
      94                 :            : void
      95                 :          0 : acpi_ut_remove_address_range(acpi_adr_space_type space_id,
      96                 :            :                              struct acpi_namespace_node *region_node)
      97                 :            : {
      98                 :          0 :         struct acpi_address_range *range_info;
      99                 :          0 :         struct acpi_address_range *prev;
     100                 :            : 
     101                 :          0 :         ACPI_FUNCTION_TRACE(ut_remove_address_range);
     102                 :            : 
     103         [ #  # ]:          0 :         if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
     104                 :            :             (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
     105                 :            :                 return_VOID;
     106                 :            :         }
     107                 :            : 
     108                 :            :         /* Get the appropriate list head and check the list */
     109                 :            : 
     110                 :          0 :         range_info = prev = acpi_gbl_address_range_list[space_id];
     111         [ #  # ]:          0 :         while (range_info) {
     112         [ #  # ]:          0 :                 if (range_info->region_node == region_node) {
     113         [ #  # ]:          0 :                         if (range_info == prev) {       /* Found at list head */
     114                 :          0 :                                 acpi_gbl_address_range_list[space_id] =
     115                 :          0 :                                     range_info->next;
     116                 :            :                         } else {
     117                 :          0 :                                 prev->next = range_info->next;
     118                 :            :                         }
     119                 :            : 
     120                 :            :                         ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
     121                 :            :                                           "\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
     122                 :            :                                           acpi_ut_get_node_name(range_info->
     123                 :            :                                                                 region_node),
     124                 :            :                                           ACPI_FORMAT_UINT64(range_info->
     125                 :            :                                                              start_address),
     126                 :            :                                           ACPI_FORMAT_UINT64(range_info->
     127                 :          0 :                                                              end_address)));
     128                 :            : 
     129                 :          0 :                         ACPI_FREE(range_info);
     130                 :          0 :                         return_VOID;
     131                 :            :                 }
     132                 :            : 
     133                 :          0 :                 prev = range_info;
     134                 :          0 :                 range_info = range_info->next;
     135                 :            :         }
     136                 :            : 
     137                 :            :         return_VOID;
     138                 :            : }
     139                 :            : 
     140                 :            : /*******************************************************************************
     141                 :            :  *
     142                 :            :  * FUNCTION:    acpi_ut_check_address_range
     143                 :            :  *
     144                 :            :  * PARAMETERS:  space_id            - Address space ID
     145                 :            :  *              address             - Start address
     146                 :            :  *              length              - Length of address range
     147                 :            :  *              warn                - TRUE if warning on overlap desired
     148                 :            :  *
     149                 :            :  * RETURN:      Count of the number of conflicts detected. Zero is always
     150                 :            :  *              returned for Space IDs other than Memory or I/O.
     151                 :            :  *
     152                 :            :  * DESCRIPTION: Check if the input address range overlaps any of the
     153                 :            :  *              ASL operation region address ranges. The only supported
     154                 :            :  *              Space IDs are Memory and I/O.
     155                 :            :  *
     156                 :            :  * MUTEX:       Assumes the namespace is locked.
     157                 :            :  *
     158                 :            :  ******************************************************************************/
     159                 :            : 
     160                 :            : u32
     161                 :          0 : acpi_ut_check_address_range(acpi_adr_space_type space_id,
     162                 :            :                             acpi_physical_address address, u32 length, u8 warn)
     163                 :            : {
     164                 :          0 :         struct acpi_address_range *range_info;
     165                 :          0 :         acpi_physical_address end_address;
     166                 :          0 :         char *pathname;
     167                 :          0 :         u32 overlap_count = 0;
     168                 :            : 
     169                 :          0 :         ACPI_FUNCTION_TRACE(ut_check_address_range);
     170                 :            : 
     171         [ #  # ]:          0 :         if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
     172                 :            :             (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
     173                 :            :                 return_UINT32(0);
     174                 :            :         }
     175                 :            : 
     176                 :          0 :         range_info = acpi_gbl_address_range_list[space_id];
     177                 :          0 :         end_address = address + length - 1;
     178                 :            : 
     179                 :            :         /* Check entire list for all possible conflicts */
     180                 :            : 
     181         [ #  # ]:          0 :         while (range_info) {
     182                 :            :                 /*
     183                 :            :                  * Check if the requested address/length overlaps this
     184                 :            :                  * address range. There are four cases to consider:
     185                 :            :                  *
     186                 :            :                  * 1) Input address/length is contained completely in the
     187                 :            :                  *    address range
     188                 :            :                  * 2) Input address/length overlaps range at the range start
     189                 :            :                  * 3) Input address/length overlaps range at the range end
     190                 :            :                  * 4) Input address/length completely encompasses the range
     191                 :            :                  */
     192         [ #  # ]:          0 :                 if ((address <= range_info->end_address) &&
     193         [ #  # ]:          0 :                     (end_address >= range_info->start_address)) {
     194                 :            : 
     195                 :            :                         /* Found an address range overlap */
     196                 :            : 
     197                 :          0 :                         overlap_count++;
     198         [ #  # ]:          0 :                         if (warn) {     /* Optional warning message */
     199                 :          0 :                                 pathname =
     200                 :          0 :                                     acpi_ns_get_normalized_pathname(range_info->
     201                 :            :                                                                     region_node,
     202                 :            :                                                                     TRUE);
     203                 :            : 
     204                 :          0 :                                 ACPI_WARNING((AE_INFO,
     205                 :            :                                               "%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)",
     206                 :            :                                               acpi_ut_get_region_name(space_id),
     207                 :            :                                               ACPI_FORMAT_UINT64(address),
     208                 :            :                                               ACPI_FORMAT_UINT64(end_address),
     209                 :            :                                               ACPI_FORMAT_UINT64(range_info->
     210                 :            :                                                                  start_address),
     211                 :            :                                               ACPI_FORMAT_UINT64(range_info->
     212                 :            :                                                                  end_address),
     213                 :            :                                               pathname));
     214                 :          0 :                                 ACPI_FREE(pathname);
     215                 :            :                         }
     216                 :            :                 }
     217                 :            : 
     218                 :          0 :                 range_info = range_info->next;
     219                 :            :         }
     220                 :            : 
     221                 :            :         return_UINT32(overlap_count);
     222                 :            : }
     223                 :            : 
     224                 :            : /*******************************************************************************
     225                 :            :  *
     226                 :            :  * FUNCTION:    acpi_ut_delete_address_lists
     227                 :            :  *
     228                 :            :  * PARAMETERS:  None
     229                 :            :  *
     230                 :            :  * RETURN:      None
     231                 :            :  *
     232                 :            :  * DESCRIPTION: Delete all global address range lists (called during
     233                 :            :  *              subsystem shutdown).
     234                 :            :  *
     235                 :            :  ******************************************************************************/
     236                 :            : 
     237                 :          0 : void acpi_ut_delete_address_lists(void)
     238                 :            : {
     239                 :          0 :         struct acpi_address_range *next;
     240                 :          0 :         struct acpi_address_range *range_info;
     241                 :          0 :         int i;
     242                 :            : 
     243                 :            :         /* Delete all elements in all address range lists */
     244                 :            : 
     245         [ #  # ]:          0 :         for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++) {
     246                 :          0 :                 next = acpi_gbl_address_range_list[i];
     247                 :            : 
     248         [ #  # ]:          0 :                 while (next) {
     249                 :          0 :                         range_info = next;
     250                 :          0 :                         next = range_info->next;
     251                 :          0 :                         ACPI_FREE(range_info);
     252                 :            :                 }
     253                 :            : 
     254                 :          0 :                 acpi_gbl_address_range_list[i] = NULL;
     255                 :            :         }
     256                 :          0 : }