diff options
Diffstat (limited to 'drivers/acpi/acpica/tbinstal.c')
| -rw-r--r-- | drivers/acpi/acpica/tbinstal.c | 846 |
1 files changed, 318 insertions, 528 deletions
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c index 42a13c0d701..755b90c40dd 100644 --- a/drivers/acpi/acpica/tbinstal.c +++ b/drivers/acpi/acpica/tbinstal.c @@ -5,7 +5,7 @@ *****************************************************************************/ /* - * Copyright (C) 2000 - 2013, Intel Corp. + * Copyright (C) 2000 - 2014, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -43,693 +43,483 @@ #include <acpi/acpi.h> #include "accommon.h" -#include "acnamesp.h" #include "actables.h" #define _COMPONENT ACPI_TABLES ACPI_MODULE_NAME("tbinstal") -/****************************************************************************** +/* Local prototypes */ +static u8 +acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index); + +/******************************************************************************* * - * FUNCTION: acpi_tb_verify_table + * FUNCTION: acpi_tb_compare_tables * - * PARAMETERS: table_desc - table + * PARAMETERS: table_desc - Table 1 descriptor to be compared + * table_index - Index of table 2 to be compared * - * RETURN: Status + * RETURN: TRUE if both tables are identical. * - * DESCRIPTION: this function is called to verify and map table + * DESCRIPTION: This function compares a table with another table that has + * already been installed in the root table list. * - *****************************************************************************/ -acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc) + ******************************************************************************/ + +static u8 +acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index) { acpi_status status = AE_OK; - - ACPI_FUNCTION_TRACE(tb_verify_table); - - /* Map the table if necessary */ - - if (!table_desc->pointer) { - if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) == - ACPI_TABLE_ORIGIN_MAPPED) { - table_desc->pointer = - acpi_os_map_memory(table_desc->address, - table_desc->length); - } - if (!table_desc->pointer) { - return_ACPI_STATUS(AE_NO_MEMORY); - } + u8 is_identical; + struct acpi_table_header *table; + u32 table_length; + u8 table_flags; + + status = + acpi_tb_acquire_table(&acpi_gbl_root_table_list.tables[table_index], + &table, &table_length, &table_flags); + if (ACPI_FAILURE(status)) { + return (FALSE); } - /* FACS is the odd table, has no standard ACPI header and no checksum */ - - if (!ACPI_COMPARE_NAME(&table_desc->signature, ACPI_SIG_FACS)) { + /* + * Check for a table match on the entire table length, + * not just the header. + */ + is_identical = (u8)((table_desc->length != table_length || + ACPI_MEMCMP(table_desc->pointer, table, + table_length)) ? FALSE : TRUE); - /* Always calculate checksum, ignore bad checksum if requested */ + /* Release the acquired table */ - status = - acpi_tb_verify_checksum(table_desc->pointer, - table_desc->length); - } - - return_ACPI_STATUS(status); + acpi_tb_release_table(table, table_length, table_flags); + return (is_identical); } /******************************************************************************* * - * FUNCTION: acpi_tb_add_table + * FUNCTION: acpi_tb_install_table_with_override * - * PARAMETERS: table_desc - Table descriptor - * table_index - Where the table index is returned + * PARAMETERS: table_index - Index into root table array + * new_table_desc - New table descriptor to install + * override - Whether override should be performed * - * RETURN: Status + * RETURN: None * - * DESCRIPTION: This function is called to add an ACPI table. It is used to - * dynamically load tables via the Load and load_table AML - * operators. + * DESCRIPTION: Install an ACPI table into the global data structure. The + * table override mechanism is called to allow the host + * OS to replace any table before it is installed in the root + * table array. * ******************************************************************************/ -acpi_status -acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index) +void +acpi_tb_install_table_with_override(u32 table_index, + struct acpi_table_desc *new_table_desc, + u8 override) { - u32 i; - acpi_status status = AE_OK; - - ACPI_FUNCTION_TRACE(tb_add_table); - if (!table_desc->pointer) { - status = acpi_tb_verify_table(table_desc); - if (ACPI_FAILURE(status) || !table_desc->pointer) { - return_ACPI_STATUS(status); - } + if (table_index >= acpi_gbl_root_table_list.current_table_count) { + return; } /* - * Validate the incoming table signature. + * ACPI Table Override: * - * 1) Originally, we checked the table signature for "SSDT" or "PSDT". - * 2) We added support for OEMx tables, signature "OEM". - * 3) Valid tables were encountered with a null signature, so we just - * gave up on validating the signature, (05/2008). - * 4) We encountered non-AML tables such as the MADT, which caused - * interpreter errors and kernel faults. So now, we once again allow - * only "SSDT", "OEMx", and now, also a null signature. (05/2011). + * Before we install the table, let the host OS override it with a new + * one if desired. Any table within the RSDT/XSDT can be replaced, + * including the DSDT which is pointed to by the FADT. */ - if ((table_desc->pointer->signature[0] != 0x00) && - (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT)) - && (ACPI_STRNCMP(table_desc->pointer->signature, "OEM", 3))) { - ACPI_BIOS_ERROR((AE_INFO, - "Table has invalid signature [%4.4s] (0x%8.8X), " - "must be SSDT or OEMx", - acpi_ut_valid_acpi_name(table_desc->pointer-> - signature) ? - table_desc->pointer->signature : "????", - *(u32 *)table_desc->pointer->signature)); - - return_ACPI_STATUS(AE_BAD_SIGNATURE); + if (override) { + acpi_tb_override_table(new_table_desc); } - (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); - - /* Check if table is already registered */ - - for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) { - if (!acpi_gbl_root_table_list.tables[i].pointer) { - status = - acpi_tb_verify_table(&acpi_gbl_root_table_list. - tables[i]); - if (ACPI_FAILURE(status) - || !acpi_gbl_root_table_list.tables[i].pointer) { - continue; - } - } - - /* - * Check for a table match on the entire table length, - * not just the header. - */ - if (table_desc->length != - acpi_gbl_root_table_list.tables[i].length) { - continue; - } - - if (ACPI_MEMCMP(table_desc->pointer, - acpi_gbl_root_table_list.tables[i].pointer, - acpi_gbl_root_table_list.tables[i].length)) { - continue; - } - - /* - * Note: the current mechanism does not unregister a table if it is - * dynamically unloaded. The related namespace entries are deleted, - * but the table remains in the root table list. - * - * The assumption here is that the number of different tables that - * will be loaded is actually small, and there is minimal overhead - * in just keeping the table in case it is needed again. - * - * If this assumption changes in the future (perhaps on large - * machines with many table load/unload operations), tables will - * need to be unregistered when they are unloaded, and slots in the - * root table list should be reused when empty. - */ - - /* - * Table is already registered. - * We can delete the table that was passed as a parameter. - */ - acpi_tb_delete_table(table_desc); - *table_index = i; + acpi_tb_init_table_descriptor(&acpi_gbl_root_table_list. + tables[table_index], + new_table_desc->address, + new_table_desc->flags, + new_table_desc->pointer); - if (acpi_gbl_root_table_list.tables[i]. - flags & ACPI_TABLE_IS_LOADED) { + acpi_tb_print_table_header(new_table_desc->address, + new_table_desc->pointer); - /* Table is still loaded, this is an error */ + /* Set the global integer width (based upon revision of the DSDT) */ - status = AE_ALREADY_EXISTS; - goto release; - } else { - /* Table was unloaded, allow it to be reloaded */ - - table_desc->pointer = - acpi_gbl_root_table_list.tables[i].pointer; - table_desc->address = - acpi_gbl_root_table_list.tables[i].address; - status = AE_OK; - goto print_header; - } - } - - /* - * ACPI Table Override: - * Allow the host to override dynamically loaded tables. - * NOTE: the table is fully mapped at this point, and the mapping will - * be deleted by tb_table_override if the table is actually overridden. - */ - (void)acpi_tb_table_override(table_desc->pointer, table_desc); - - /* Add the table to the global root table list */ - - status = acpi_tb_store_table(table_desc->address, table_desc->pointer, - table_desc->length, table_desc->flags, - table_index); - if (ACPI_FAILURE(status)) { - goto release; + if (table_index == ACPI_TABLE_INDEX_DSDT) { + acpi_ut_set_integer_width(new_table_desc->pointer->revision); } - - print_header: - acpi_tb_print_table_header(table_desc->address, table_desc->pointer); - - release: - (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); - return_ACPI_STATUS(status); } /******************************************************************************* * - * FUNCTION: acpi_tb_table_override + * FUNCTION: acpi_tb_install_fixed_table * - * PARAMETERS: table_header - Header for the original table - * table_desc - Table descriptor initialized for the - * original table. May or may not be mapped. + * PARAMETERS: address - Physical address of DSDT or FACS + * signature - Table signature, NULL if no need to + * match + * table_index - Index into root table array * - * RETURN: Pointer to the entire new table. NULL if table not overridden. - * If overridden, installs the new table within the input table - * descriptor. + * RETURN: Status * - * DESCRIPTION: Attempt table override by calling the OSL override functions. - * Note: If the table is overridden, then the entire new table - * is mapped and returned by this function. + * DESCRIPTION: Install a fixed ACPI table (DSDT/FACS) into the global data + * structure. * ******************************************************************************/ -struct acpi_table_header *acpi_tb_table_override(struct acpi_table_header - *table_header, - struct acpi_table_desc - *table_desc) +acpi_status +acpi_tb_install_fixed_table(acpi_physical_address address, + char *signature, u32 table_index) { + struct acpi_table_desc new_table_desc; acpi_status status; - struct acpi_table_header *new_table = NULL; - acpi_physical_address new_address = 0; - u32 new_table_length = 0; - u8 new_flags; - char *override_type; - /* (1) Attempt logical override (returns a logical address) */ + ACPI_FUNCTION_TRACE(tb_install_fixed_table); - status = acpi_os_table_override(table_header, &new_table); - if (ACPI_SUCCESS(status) && new_table) { - new_address = ACPI_PTR_TO_PHYSADDR(new_table); - new_table_length = new_table->length; - new_flags = ACPI_TABLE_ORIGIN_OVERRIDE; - override_type = "Logical"; - goto finish_override; + if (!address) { + ACPI_ERROR((AE_INFO, + "Null physical address for ACPI table [%s]", + signature)); + return (AE_NO_MEMORY); } - /* (2) Attempt physical override (returns a physical address) */ + /* Fill a table descriptor for validation */ - status = acpi_os_physical_table_override(table_header, - &new_address, - &new_table_length); - if (ACPI_SUCCESS(status) && new_address && new_table_length) { - - /* Map the entire new table */ - - new_table = acpi_os_map_memory(new_address, new_table_length); - if (!new_table) { - ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY, - "%4.4s %p Attempted physical table override failed", - table_header->signature, - ACPI_CAST_PTR(void, - table_desc->address))); - return (NULL); - } - - override_type = "Physical"; - new_flags = ACPI_TABLE_ORIGIN_MAPPED; - goto finish_override; + status = acpi_tb_acquire_temp_table(&new_table_desc, address, + ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL); + if (ACPI_FAILURE(status)) { + ACPI_ERROR((AE_INFO, "Could not acquire table length at %p", + ACPI_CAST_PTR(void, address))); + return_ACPI_STATUS(status); } - return (NULL); /* There was no override */ - - finish_override: + /* Validate and verify a table before installation */ - ACPI_INFO((AE_INFO, - "%4.4s %p %s table override, new table: %p", - table_header->signature, - ACPI_CAST_PTR(void, table_desc->address), - override_type, new_table)); - - /* We can now unmap/delete the original table (if fully mapped) */ + status = acpi_tb_verify_temp_table(&new_table_desc, signature); + if (ACPI_FAILURE(status)) { + goto release_and_exit; + } - acpi_tb_delete_table(table_desc); + acpi_tb_install_table_with_override(table_index, &new_table_desc, TRUE); - /* Setup descriptor for the new table */ +release_and_exit: - table_desc->address = new_address; - table_desc->pointer = new_table; - table_desc->length = new_table_length; - table_desc->flags = new_flags; + /* Release the temporary table descriptor */ - return (new_table); + acpi_tb_release_temp_table(&new_table_desc); + return_ACPI_STATUS(status); } /******************************************************************************* * - * FUNCTION: acpi_tb_resize_root_table_list + * FUNCTION: acpi_tb_install_standard_table * - * PARAMETERS: None + * PARAMETERS: address - Address of the table (might be a virtual + * address depending on the table_flags) + * flags - Flags for the table + * reload - Whether reload should be performed + * override - Whether override should be performed + * table_index - Where the table index is returned * * RETURN: Status * - * DESCRIPTION: Expand the size of global table array + * DESCRIPTION: This function is called to install an ACPI table that is + * neither DSDT nor FACS (a "standard" table.) + * When this function is called by "Load" or "LoadTable" opcodes, + * or by acpi_load_table() API, the "Reload" parameter is set. + * After sucessfully returning from this function, table is + * "INSTALLED" but not "VALIDATED". * ******************************************************************************/ -acpi_status acpi_tb_resize_root_table_list(void) +acpi_status +acpi_tb_install_standard_table(acpi_physical_address address, + u8 flags, + u8 reload, u8 override, u32 *table_index) { - struct acpi_table_desc *tables; - u32 table_count; - - ACPI_FUNCTION_TRACE(tb_resize_root_table_list); - - /* allow_resize flag is a parameter to acpi_initialize_tables */ + u32 i; + acpi_status status = AE_OK; + struct acpi_table_desc new_table_desc; - if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) { - ACPI_ERROR((AE_INFO, - "Resize of Root Table Array is not allowed")); - return_ACPI_STATUS(AE_SUPPORT); - } + ACPI_FUNCTION_TRACE(tb_install_standard_table); - /* Increase the Table Array size */ + /* Acquire a temporary table descriptor for validation */ - if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) { - table_count = acpi_gbl_root_table_list.max_table_count; - } else { - table_count = acpi_gbl_root_table_list.current_table_count; + status = acpi_tb_acquire_temp_table(&new_table_desc, address, flags); + if (ACPI_FAILURE(status)) { + ACPI_ERROR((AE_INFO, "Could not acquire table length at %p", + ACPI_CAST_PTR(void, address))); + return_ACPI_STATUS(status); } - tables = ACPI_ALLOCATE_ZEROED(((acpi_size) table_count + - ACPI_ROOT_TABLE_SIZE_INCREMENT) * - sizeof(struct acpi_table_desc)); - if (!tables) { - ACPI_ERROR((AE_INFO, - "Could not allocate new root table array")); - return_ACPI_STATUS(AE_NO_MEMORY); + /* + * Optionally do not load any SSDTs from the RSDT/XSDT. This can + * be useful for debugging ACPI problems on some machines. + */ + if (!reload && + acpi_gbl_disable_ssdt_table_install && + ACPI_COMPARE_NAME(&new_table_desc.signature, ACPI_SIG_SSDT)) { + ACPI_INFO((AE_INFO, "Ignoring installation of %4.4s at %p", + new_table_desc.signature.ascii, ACPI_CAST_PTR(void, + address))); + goto release_and_exit; } - /* Copy and free the previous table array */ - - if (acpi_gbl_root_table_list.tables) { - ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, - (acpi_size) table_count * - sizeof(struct acpi_table_desc)); + /* Validate and verify a table before installation */ - if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) { - ACPI_FREE(acpi_gbl_root_table_list.tables); - } + status = acpi_tb_verify_temp_table(&new_table_desc, NULL); + if (ACPI_FAILURE(status)) { + goto release_and_exit; } - acpi_gbl_root_table_list.tables = tables; - acpi_gbl_root_table_list.max_table_count = - table_count + ACPI_ROOT_TABLE_SIZE_INCREMENT; - acpi_gbl_root_table_list.flags |= ACPI_ROOT_ORIGIN_ALLOCATED; - - return_ACPI_STATUS(AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_tb_store_table - * - * PARAMETERS: address - Table address - * table - Table header - * length - Table length - * flags - flags - * - * RETURN: Status and table index. - * - * DESCRIPTION: Add an ACPI table to the global table list - * - ******************************************************************************/ + if (reload) { + /* + * Validate the incoming table signature. + * + * 1) Originally, we checked the table signature for "SSDT" or "PSDT". + * 2) We added support for OEMx tables, signature "OEM". + * 3) Valid tables were encountered with a null signature, so we just + * gave up on validating the signature, (05/2008). + * 4) We encountered non-AML tables such as the MADT, which caused + * interpreter errors and kernel faults. So now, we once again allow + * only "SSDT", "OEMx", and now, also a null signature. (05/2011). + */ + if ((new_table_desc.signature.ascii[0] != 0x00) && + (!ACPI_COMPARE_NAME + (&new_table_desc.signature, ACPI_SIG_SSDT)) + && (ACPI_STRNCMP(new_table_desc.signature.ascii, "OEM", 3))) + { + ACPI_BIOS_ERROR((AE_INFO, + "Table has invalid signature [%4.4s] (0x%8.8X), " + "must be SSDT or OEMx", + acpi_ut_valid_acpi_name(new_table_desc. + signature. + ascii) ? + new_table_desc.signature. + ascii : "????", + new_table_desc.signature.integer)); + + status = AE_BAD_SIGNATURE; + goto release_and_exit; + } -acpi_status -acpi_tb_store_table(acpi_physical_address address, - struct acpi_table_header *table, - u32 length, u8 flags, u32 *table_index) -{ - acpi_status status; - struct acpi_table_desc *new_table; + /* Check if table is already registered */ - /* Ensure that there is room for the table in the Root Table List */ + for (i = 0; i < acpi_gbl_root_table_list.current_table_count; + ++i) { + /* + * Check for a table match on the entire table length, + * not just the header. + */ + if (!acpi_tb_compare_tables(&new_table_desc, i)) { + continue; + } - if (acpi_gbl_root_table_list.current_table_count >= - acpi_gbl_root_table_list.max_table_count) { - status = acpi_tb_resize_root_table_list(); - if (ACPI_FAILURE(status)) { - return (status); + /* + * Note: the current mechanism does not unregister a table if it is + * dynamically unloaded. The related namespace entries are deleted, + * but the table remains in the root table list. + * + * The assumption here is that the number of different tables that + * will be loaded is actually small, and there is minimal overhead + * in just keeping the table in case it is needed again. + * + * If this assumption changes in the future (perhaps on large + * machines with many table load/unload operations), tables will + * need to be unregistered when they are unloaded, and slots in the + * root table list should be reused when empty. + */ + if (acpi_gbl_root_table_list.tables[i]. + flags & ACPI_TABLE_IS_LOADED) { + + /* Table is still loaded, this is an error */ + + status = AE_ALREADY_EXISTS; + goto release_and_exit; + } else { + /* + * Table was unloaded, allow it to be reloaded. + * As we are going to return AE_OK to the caller, we should + * take the responsibility of freeing the input descriptor. + * Refill the input descriptor to ensure + * acpi_tb_install_table_with_override() can be called again to + * indicate the re-installation. + */ + acpi_tb_uninstall_table(&new_table_desc); + *table_index = i; + (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); + return_ACPI_STATUS(AE_OK); + } } } - new_table = - &acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list. - current_table_count]; - - /* Initialize added table */ - - new_table->address = address; - new_table->pointer = table; - new_table->length = length; - new_table->owner_id = 0; - new_table->flags = flags; - - ACPI_MOVE_32_TO_32(&new_table->signature, table->signature); - - *table_index = acpi_gbl_root_table_list.current_table_count; - acpi_gbl_root_table_list.current_table_count++; - return (AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_tb_delete_table - * - * PARAMETERS: table_index - Table index - * - * RETURN: None - * - * DESCRIPTION: Delete one internal ACPI table - * - ******************************************************************************/ + /* Add the table to the global root table list */ -void acpi_tb_delete_table(struct acpi_table_desc *table_desc) -{ - /* Table must be mapped or allocated */ - if (!table_desc->pointer) { - return; + status = acpi_tb_get_next_root_index(&i); + if (ACPI_FAILURE(status)) { + goto release_and_exit; } - switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) { - case ACPI_TABLE_ORIGIN_MAPPED: - - acpi_os_unmap_memory(table_desc->pointer, table_desc->length); - break; - - case ACPI_TABLE_ORIGIN_ALLOCATED: - ACPI_FREE(table_desc->pointer); - break; + *table_index = i; + acpi_tb_install_table_with_override(i, &new_table_desc, override); - /* Not mapped or allocated, there is nothing we can do */ +release_and_exit: - default: + /* Release the temporary table descriptor */ - return; - } - - table_desc->pointer = NULL; + acpi_tb_release_temp_table(&new_table_desc); + return_ACPI_STATUS(status); } /******************************************************************************* * - * FUNCTION: acpi_tb_terminate + * FUNCTION: acpi_tb_override_table * - * PARAMETERS: None + * PARAMETERS: old_table_desc - Validated table descriptor to be + * overridden * * RETURN: None * - * DESCRIPTION: Delete all internal ACPI tables + * DESCRIPTION: Attempt table override by calling the OSL override functions. + * Note: If the table is overridden, then the entire new table + * is acquired and returned by this function. + * Before/after invocation, the table descriptor is in a state + * that is "VALIDATED". * ******************************************************************************/ -void acpi_tb_terminate(void) +void acpi_tb_override_table(struct acpi_table_desc *old_table_desc) { - u32 i; - - ACPI_FUNCTION_TRACE(tb_terminate); - - (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); - - /* Delete the individual tables */ + acpi_status status; + char *override_type; + struct acpi_table_desc new_table_desc; + struct acpi_table_header *table; + acpi_physical_address address; + u32 length; - for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) { - acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]); - } + /* (1) Attempt logical override (returns a logical address) */ - /* - * Delete the root table array if allocated locally. Array cannot be - * mapped, so we don't need to check for that flag. - */ - if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) { - ACPI_FREE(acpi_gbl_root_table_list.tables); + status = acpi_os_table_override(old_table_desc->pointer, &table); + if (ACPI_SUCCESS(status) && table) { + acpi_tb_acquire_temp_table(&new_table_desc, + ACPI_PTR_TO_PHYSADDR(table), + ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL); + override_type = "Logical"; + goto finish_override; } - acpi_gbl_root_table_list.tables = NULL; - acpi_gbl_root_table_list.flags = 0; - acpi_gbl_root_table_list.current_table_count = 0; + /* (2) Attempt physical override (returns a physical address) */ - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n")); - (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); + status = acpi_os_physical_table_override(old_table_desc->pointer, + &address, &length); + if (ACPI_SUCCESS(status) && address && length) { + acpi_tb_acquire_temp_table(&new_table_desc, address, + ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL); + override_type = "Physical"; + goto finish_override; + } - return_VOID; -} + return; /* There was no override */ -/******************************************************************************* - * - * FUNCTION: acpi_tb_delete_namespace_by_owner - * - * PARAMETERS: table_index - Table index - * - * RETURN: Status - * - * DESCRIPTION: Delete all namespace objects created when this table was loaded. - * - ******************************************************************************/ - -acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index) -{ - acpi_owner_id owner_id; - acpi_status status; +finish_override: - ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner); + /* Validate and verify a table before overriding */ - status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES); + status = acpi_tb_verify_temp_table(&new_table_desc, NULL); if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); + return; } - if (table_index >= acpi_gbl_root_table_list.current_table_count) { - - /* The table index does not exist */ - - (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); - return_ACPI_STATUS(AE_NOT_EXIST); - } + ACPI_INFO((AE_INFO, "%4.4s " ACPI_PRINTF_UINT + " %s table override, new table: " ACPI_PRINTF_UINT, + old_table_desc->signature.ascii, + ACPI_FORMAT_TO_UINT(old_table_desc->address), + override_type, ACPI_FORMAT_TO_UINT(new_table_desc.address))); - /* Get the owner ID for this table, used to delete namespace nodes */ + /* We can now uninstall the original table */ - owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id; - (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); + acpi_tb_uninstall_table(old_table_desc); /* - * Need to acquire the namespace writer lock to prevent interference - * with any concurrent namespace walks. The interpreter must be - * released during the deletion since the acquisition of the deletion - * lock may block, and also since the execution of a namespace walk - * must be allowed to use the interpreter. + * Replace the original table descriptor and keep its state as + * "VALIDATED". */ - (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER); - status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock); - - acpi_ns_delete_namespace_by_owner(owner_id); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } + acpi_tb_init_table_descriptor(old_table_desc, new_table_desc.address, + new_table_desc.flags, + new_table_desc.pointer); + acpi_tb_validate_temp_table(old_table_desc); - acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock); + /* Release the temporary table descriptor */ - status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER); - return_ACPI_STATUS(status); + acpi_tb_release_temp_table(&new_table_desc); } /******************************************************************************* * - * FUNCTION: acpi_tb_allocate_owner_id + * FUNCTION: acpi_tb_store_table * - * PARAMETERS: table_index - Table index + * PARAMETERS: address - Table address + * table - Table header + * length - Table length + * flags - Install flags + * table_index - Where the table index is returned * - * RETURN: Status + * RETURN: Status and table index. * - * DESCRIPTION: Allocates owner_id in table_desc + * DESCRIPTION: Add an ACPI table to the global table list * ******************************************************************************/ -acpi_status acpi_tb_allocate_owner_id(u32 table_index) +acpi_status +acpi_tb_store_table(acpi_physical_address address, + struct acpi_table_header * table, + u32 length, u8 flags, u32 *table_index) { - acpi_status status = AE_BAD_PARAMETER; - - ACPI_FUNCTION_TRACE(tb_allocate_owner_id); + acpi_status status; + struct acpi_table_desc *table_desc; - (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); - if (table_index < acpi_gbl_root_table_list.current_table_count) { - status = acpi_ut_allocate_owner_id - (&(acpi_gbl_root_table_list.tables[table_index].owner_id)); + status = acpi_tb_get_next_root_index(table_index); + if (ACPI_FAILURE(status)) { + return (status); } - (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_tb_release_owner_id - * - * PARAMETERS: table_index - Table index - * - * RETURN: Status - * - * DESCRIPTION: Releases owner_id in table_desc - * - ******************************************************************************/ - -acpi_status acpi_tb_release_owner_id(u32 table_index) -{ - acpi_status status = AE_BAD_PARAMETER; - - ACPI_FUNCTION_TRACE(tb_release_owner_id); - - (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); - if (table_index < acpi_gbl_root_table_list.current_table_count) { - acpi_ut_release_owner_id(& - (acpi_gbl_root_table_list. - tables[table_index].owner_id)); - status = AE_OK; - } + /* Initialize added table */ - (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); - return_ACPI_STATUS(status); + table_desc = &acpi_gbl_root_table_list.tables[*table_index]; + acpi_tb_init_table_descriptor(table_desc, address, flags, table); + table_desc->pointer = table; + return (AE_OK); } /******************************************************************************* * - * FUNCTION: acpi_tb_get_owner_id + * FUNCTION: acpi_tb_uninstall_table * - * PARAMETERS: table_index - Table index - * owner_id - Where the table owner_id is returned + * PARAMETERS: table_desc - Table descriptor * - * RETURN: Status + * RETURN: None * - * DESCRIPTION: returns owner_id for the ACPI table + * DESCRIPTION: Delete one internal ACPI table * ******************************************************************************/ -acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id) +void acpi_tb_uninstall_table(struct acpi_table_desc *table_desc) { - acpi_status status = AE_BAD_PARAMETER; - - ACPI_FUNCTION_TRACE(tb_get_owner_id); - - (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); - if (table_index < acpi_gbl_root_table_list.current_table_count) { - *owner_id = - acpi_gbl_root_table_list.tables[table_index].owner_id; - status = AE_OK; - } - (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_tb_is_table_loaded - * - * PARAMETERS: table_index - Table index - * - * RETURN: Table Loaded Flag - * - ******************************************************************************/ + ACPI_FUNCTION_TRACE(tb_uninstall_table); -u8 acpi_tb_is_table_loaded(u32 table_index) -{ - u8 is_loaded = FALSE; + /* Table must be installed */ - (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); - if (table_index < acpi_gbl_root_table_list.current_table_count) { - is_loaded = (u8) - (acpi_gbl_root_table_list.tables[table_index].flags & - ACPI_TABLE_IS_LOADED); + if (!table_desc->address) { + return_VOID; } - (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); - return (is_loaded); -} - -/******************************************************************************* - * - * FUNCTION: acpi_tb_set_table_loaded_flag - * - * PARAMETERS: table_index - Table index - * is_loaded - TRUE if table is loaded, FALSE otherwise - * - * RETURN: None - * - * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE. - * - ******************************************************************************/ - -void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded) -{ + acpi_tb_invalidate_table(table_desc); - (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); - if (table_index < acpi_gbl_root_table_list.current_table_count) { - if (is_loaded) { - acpi_gbl_root_table_list.tables[table_index].flags |= - ACPI_TABLE_IS_LOADED; - } else { - acpi_gbl_root_table_list.tables[table_index].flags &= - ~ACPI_TABLE_IS_LOADED; - } + if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) == + ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL) { + ACPI_FREE(ACPI_CAST_PTR(void, table_desc->address)); } - (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); + table_desc->address = ACPI_PTR_TO_PHYSADDR(NULL); + return_VOID; } |