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  1. /******************************************************************************
  2.  *
  3.  * Module Name: utalloc - local memory allocation routines
  4.  *
  5.  *****************************************************************************/
  6.  
  7. /*
  8.  * Copyright (C) 2000 - 2015, 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 "acdebug.h"
  47.  
  48. #define _COMPONENT          ACPI_UTILITIES
  49. ACPI_MODULE_NAME("utalloc")
  50.  
  51. #if !defined (USE_NATIVE_ALLOCATE_ZEROED)
  52. /*******************************************************************************
  53.  *
  54.  * FUNCTION:    acpi_os_allocate_zeroed
  55.  *
  56.  * PARAMETERS:  size                - Size of the allocation
  57.  *
  58.  * RETURN:      Address of the allocated memory on success, NULL on failure.
  59.  *
  60.  * DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory.
  61.  *              This is the default implementation. Can be overridden via the
  62.  *              USE_NATIVE_ALLOCATE_ZEROED flag.
  63.  *
  64.  ******************************************************************************/
  65. void *acpi_os_allocate_zeroed(acpi_size size)
  66. {
  67.         void *allocation;
  68.  
  69.         ACPI_FUNCTION_ENTRY();
  70.  
  71.         allocation = acpi_os_allocate(size);
  72.         if (allocation) {
  73.  
  74.                 /* Clear the memory block */
  75.  
  76.                 memset(allocation, 0, size);
  77.         }
  78.  
  79.         return (allocation);
  80. }
  81.  
  82. #endif                          /* !USE_NATIVE_ALLOCATE_ZEROED */
  83.  
  84. /*******************************************************************************
  85.  *
  86.  * FUNCTION:    acpi_ut_create_caches
  87.  *
  88.  * PARAMETERS:  None
  89.  *
  90.  * RETURN:      Status
  91.  *
  92.  * DESCRIPTION: Create all local caches
  93.  *
  94.  ******************************************************************************/
  95.  
  96. acpi_status acpi_ut_create_caches(void)
  97. {
  98.         acpi_status status;
  99.  
  100.         /* Object Caches, for frequently used objects */
  101.  
  102.         status =
  103.             acpi_os_create_cache("Acpi-Namespace",
  104.                                  sizeof(struct acpi_namespace_node),
  105.                                  ACPI_MAX_NAMESPACE_CACHE_DEPTH,
  106.                                  &acpi_gbl_namespace_cache);
  107.         if (ACPI_FAILURE(status)) {
  108.                 return (status);
  109.         }
  110.  
  111.         status =
  112.             acpi_os_create_cache("Acpi-State", sizeof(union acpi_generic_state),
  113.                                  ACPI_MAX_STATE_CACHE_DEPTH,
  114.                                  &acpi_gbl_state_cache);
  115.         if (ACPI_FAILURE(status)) {
  116.                 return (status);
  117.         }
  118.  
  119.         status =
  120.             acpi_os_create_cache("Acpi-Parse",
  121.                                  sizeof(struct acpi_parse_obj_common),
  122.                                  ACPI_MAX_PARSE_CACHE_DEPTH,
  123.                                  &acpi_gbl_ps_node_cache);
  124.         if (ACPI_FAILURE(status)) {
  125.                 return (status);
  126.         }
  127.  
  128.         status =
  129.             acpi_os_create_cache("Acpi-ParseExt",
  130.                                  sizeof(struct acpi_parse_obj_named),
  131.                                  ACPI_MAX_EXTPARSE_CACHE_DEPTH,
  132.                                  &acpi_gbl_ps_node_ext_cache);
  133.         if (ACPI_FAILURE(status)) {
  134.                 return (status);
  135.         }
  136.  
  137.         status =
  138.             acpi_os_create_cache("Acpi-Operand",
  139.                                  sizeof(union acpi_operand_object),
  140.                                  ACPI_MAX_OBJECT_CACHE_DEPTH,
  141.                                  &acpi_gbl_operand_cache);
  142.         if (ACPI_FAILURE(status)) {
  143.                 return (status);
  144.         }
  145. #ifdef ACPI_DBG_TRACK_ALLOCATIONS
  146.  
  147.         /* Memory allocation lists */
  148.  
  149.         status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list);
  150.         if (ACPI_FAILURE(status)) {
  151.                 return (status);
  152.         }
  153.  
  154.         status =
  155.             acpi_ut_create_list("Acpi-Namespace",
  156.                                 sizeof(struct acpi_namespace_node),
  157.                                 &acpi_gbl_ns_node_list);
  158.         if (ACPI_FAILURE(status)) {
  159.                 return (status);
  160.         }
  161. #endif
  162.  
  163.         return (AE_OK);
  164. }
  165.  
  166. /*******************************************************************************
  167.  *
  168.  * FUNCTION:    acpi_ut_delete_caches
  169.  *
  170.  * PARAMETERS:  None
  171.  *
  172.  * RETURN:      Status
  173.  *
  174.  * DESCRIPTION: Purge and delete all local caches
  175.  *
  176.  ******************************************************************************/
  177.  
  178. acpi_status acpi_ut_delete_caches(void)
  179. {
  180. #ifdef ACPI_DBG_TRACK_ALLOCATIONS
  181.         char buffer[7];
  182.  
  183.         if (acpi_gbl_display_final_mem_stats) {
  184.                 strcpy(buffer, "MEMORY");
  185.                 (void)acpi_db_display_statistics(buffer);
  186.         }
  187. #endif
  188.  
  189.         (void)acpi_os_delete_cache(acpi_gbl_namespace_cache);
  190.         acpi_gbl_namespace_cache = NULL;
  191.  
  192.         (void)acpi_os_delete_cache(acpi_gbl_state_cache);
  193.         acpi_gbl_state_cache = NULL;
  194.  
  195.         (void)acpi_os_delete_cache(acpi_gbl_operand_cache);
  196.         acpi_gbl_operand_cache = NULL;
  197.  
  198.         (void)acpi_os_delete_cache(acpi_gbl_ps_node_cache);
  199.         acpi_gbl_ps_node_cache = NULL;
  200.  
  201.         (void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache);
  202.         acpi_gbl_ps_node_ext_cache = NULL;
  203.  
  204. #ifdef ACPI_DBG_TRACK_ALLOCATIONS
  205.  
  206.         /* Debug only - display leftover memory allocation, if any */
  207.  
  208.         acpi_ut_dump_allocations(ACPI_UINT32_MAX, NULL);
  209.  
  210.         /* Free memory lists */
  211.  
  212.         acpi_os_free(acpi_gbl_global_list);
  213.         acpi_gbl_global_list = NULL;
  214.  
  215.         acpi_os_free(acpi_gbl_ns_node_list);
  216.         acpi_gbl_ns_node_list = NULL;
  217. #endif
  218.  
  219.         return (AE_OK);
  220. }
  221.  
  222. /*******************************************************************************
  223.  *
  224.  * FUNCTION:    acpi_ut_validate_buffer
  225.  *
  226.  * PARAMETERS:  buffer              - Buffer descriptor to be validated
  227.  *
  228.  * RETURN:      Status
  229.  *
  230.  * DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer
  231.  *
  232.  ******************************************************************************/
  233.  
  234. acpi_status acpi_ut_validate_buffer(struct acpi_buffer * buffer)
  235. {
  236.  
  237.         /* Obviously, the structure pointer must be valid */
  238.  
  239.         if (!buffer) {
  240.                 return (AE_BAD_PARAMETER);
  241.         }
  242.  
  243.         /* Special semantics for the length */
  244.  
  245.         if ((buffer->length == ACPI_NO_BUFFER) ||
  246.             (buffer->length == ACPI_ALLOCATE_BUFFER) ||
  247.             (buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) {
  248.                 return (AE_OK);
  249.         }
  250.  
  251.         /* Length is valid, the buffer pointer must be also */
  252.  
  253.         if (!buffer->pointer) {
  254.                 return (AE_BAD_PARAMETER);
  255.         }
  256.  
  257.         return (AE_OK);
  258. }
  259.  
  260. /*******************************************************************************
  261.  *
  262.  * FUNCTION:    acpi_ut_initialize_buffer
  263.  *
  264.  * PARAMETERS:  buffer              - Buffer to be validated
  265.  *              required_length     - Length needed
  266.  *
  267.  * RETURN:      Status
  268.  *
  269.  * DESCRIPTION: Validate that the buffer is of the required length or
  270.  *              allocate a new buffer. Returned buffer is always zeroed.
  271.  *
  272.  ******************************************************************************/
  273.  
  274. acpi_status
  275. acpi_ut_initialize_buffer(struct acpi_buffer * buffer,
  276.                           acpi_size required_length)
  277. {
  278.         acpi_size input_buffer_length;
  279.  
  280.         /* Parameter validation */
  281.  
  282.         if (!buffer || !required_length) {
  283.                 return (AE_BAD_PARAMETER);
  284.         }
  285.  
  286.         /*
  287.          * Buffer->Length is used as both an input and output parameter. Get the
  288.          * input actual length and set the output required buffer length.
  289.          */
  290.         input_buffer_length = buffer->length;
  291.         buffer->length = required_length;
  292.  
  293.         /*
  294.          * The input buffer length contains the actual buffer length, or the type
  295.          * of buffer to be allocated by this routine.
  296.          */
  297.         switch (input_buffer_length) {
  298.         case ACPI_NO_BUFFER:
  299.  
  300.                 /* Return the exception (and the required buffer length) */
  301.  
  302.                 return (AE_BUFFER_OVERFLOW);
  303.  
  304.         case ACPI_ALLOCATE_BUFFER:
  305.                 /*
  306.                  * Allocate a new buffer. We directectly call acpi_os_allocate here to
  307.                  * purposefully bypass the (optionally enabled) internal allocation
  308.                  * tracking mechanism since we only want to track internal
  309.                  * allocations. Note: The caller should use acpi_os_free to free this
  310.                  * buffer created via ACPI_ALLOCATE_BUFFER.
  311.                  */
  312.                 buffer->pointer = acpi_os_allocate(required_length);
  313.                 break;
  314.  
  315.         case ACPI_ALLOCATE_LOCAL_BUFFER:
  316.  
  317.                 /* Allocate a new buffer with local interface to allow tracking */
  318.  
  319.                 buffer->pointer = ACPI_ALLOCATE(required_length);
  320.                 break;
  321.  
  322.         default:
  323.  
  324.                 /* Existing buffer: Validate the size of the buffer */
  325.  
  326.                 if (input_buffer_length < required_length) {
  327.                         return (AE_BUFFER_OVERFLOW);
  328.                 }
  329.                 break;
  330.         }
  331.  
  332.         /* Validate allocation from above or input buffer pointer */
  333.  
  334.         if (!buffer->pointer) {
  335.                 return (AE_NO_MEMORY);
  336.         }
  337.  
  338.         /* Have a valid buffer, clear it */
  339.  
  340.         memset(buffer->pointer, 0, required_length);
  341.         return (AE_OK);
  342. }
  343.