From 88ac00f5a841dcfc5c682000f4a6add0add8caac Mon Sep 17 00:00:00 2001 From: Robert Moore Date: Thu, 26 May 2005 00:00:00 -0400 Subject: ACPICA 20050526 from Bob Moore Implemented support to execute Type 1 and Type 2 AML opcodes appearing at the module level (not within a control method.) These opcodes are executed exactly once at the time the table is loaded. This type of code was legal up until the release of ACPI 2.0B (2002) and is now supported within ACPI CA in order to provide backwards compatibility with earlier BIOS implementations. This eliminates the "Encountered executable code at module level" warning that was previously generated upon detection of such code. Fixed a problem in the interpreter where an AE_NOT_FOUND exception could inadvertently be generated during the lookup of namespace objects in the second pass parse of ACPI tables and control methods. It appears that this problem could occur during the resolution of forward references to namespace objects. Added the ACPI_MUTEX_DEBUG #ifdef to the acpi_ut_release_mutex function, corresponding to the same the deadlock detection debug code to be compiled out in the normal case, improving mutex performance (and overall subsystem performance) considerably. As suggested by Alexey Starikovskiy. Implemented a handful of miscellaneous fixes for possible memory leaks on error conditions and error handling control paths. These fixes were suggested by FreeBSD and the Coverity Prevent source code analysis tool. Added a check for a null RSDT pointer in acpi_get_firmware_table (tbxfroot.c) to prevent a fault in this error case. Signed-off-by Len Brown --- drivers/acpi/tables/tbxfroot.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/acpi/tables') diff --git a/drivers/acpi/tables/tbxfroot.c b/drivers/acpi/tables/tbxfroot.c index dc3c3f6a9f62..198997aa7fbe 100644 --- a/drivers/acpi/tables/tbxfroot.c +++ b/drivers/acpi/tables/tbxfroot.c @@ -331,8 +331,10 @@ acpi_get_firmware_table ( cleanup: - acpi_os_unmap_memory (rsdt_info->pointer, - (acpi_size) rsdt_info->pointer->length); + if (rsdt_info->pointer) { + acpi_os_unmap_memory (rsdt_info->pointer, + (acpi_size) rsdt_info->pointer->length); + } ACPI_MEM_FREE (rsdt_info); if (header) { -- cgit v1.2.2 From 73459f73e5d1602c59ebec114fc45185521353c1 Mon Sep 17 00:00:00 2001 From: Robert Moore Date: Fri, 24 Jun 2005 00:00:00 -0400 Subject: ACPICA 20050617-0624 from Bob Moore ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown --- drivers/acpi/tables/tbconvrt.c | 8 ++++++-- drivers/acpi/tables/tbrsdt.c | 34 ++++++++++++++++++---------------- drivers/acpi/tables/tbxfroot.c | 8 +++++--- 3 files changed, 29 insertions(+), 21 deletions(-) (limited to 'drivers/acpi/tables') diff --git a/drivers/acpi/tables/tbconvrt.c b/drivers/acpi/tables/tbconvrt.c index 92e0c31539be..d4ff71f5fe5d 100644 --- a/drivers/acpi/tables/tbconvrt.c +++ b/drivers/acpi/tables/tbconvrt.c @@ -97,7 +97,9 @@ acpi_tb_get_table_count ( ACPI_FUNCTION_ENTRY (); - if (RSDP->revision < 2) { + /* RSDT pointers are 32 bits, XSDT pointers are 64 bits */ + + if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) { pointer_size = sizeof (u32); } else { @@ -158,7 +160,9 @@ acpi_tb_convert_to_xsdt ( /* Copy the table pointers */ for (i = 0; i < acpi_gbl_rsdt_table_count; i++) { - if (acpi_gbl_RSDP->revision < 2) { + /* RSDT pointers are 32 bits, XSDT pointers are 64 bits */ + + if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) { ACPI_STORE_ADDRESS (new_table->table_offset_entry[i], (ACPI_CAST_PTR (struct rsdt_descriptor_rev1, table_info->pointer))->table_offset_entry[i]); diff --git a/drivers/acpi/tables/tbrsdt.c b/drivers/acpi/tables/tbrsdt.c index b7ffe39c3626..13c6ddb2f546 100644 --- a/drivers/acpi/tables/tbrsdt.c +++ b/drivers/acpi/tables/tbrsdt.c @@ -159,8 +159,8 @@ cleanup: * * RETURN: None, Address * - * DESCRIPTION: Extract the address of the RSDT or XSDT, depending on the - * version of the RSDP + * DESCRIPTION: Extract the address of either the RSDT or XSDT, depending on the + * version of the RSDP and whether the XSDT pointer is valid * ******************************************************************************/ @@ -174,16 +174,19 @@ acpi_tb_get_rsdt_address ( out_address->pointer_type = acpi_gbl_table_flags | ACPI_LOGICAL_ADDRESSING; - /* - * For RSDP revision 0 or 1, we use the RSDT. - * For RSDP revision 2 (and above), we use the XSDT - */ - if (acpi_gbl_RSDP->revision < 2) { - out_address->pointer.value = acpi_gbl_RSDP->rsdt_physical_address; - } - else { + /* Use XSDT if it is present */ + + if ((acpi_gbl_RSDP->revision >= 2) && + acpi_gbl_RSDP->xsdt_physical_address) { out_address->pointer.value = acpi_gbl_RSDP->xsdt_physical_address; + acpi_gbl_root_table_type = ACPI_TABLE_TYPE_XSDT; + } + else { + /* No XSDT, use the RSDT */ + + out_address->pointer.value = acpi_gbl_RSDP->rsdt_physical_address; + acpi_gbl_root_table_type = ACPI_TABLE_TYPE_RSDT; } } @@ -211,10 +214,9 @@ acpi_tb_validate_rsdt ( /* - * For RSDP revision 0 or 1, we use the RSDT. - * For RSDP revision 2 and above, we use the XSDT + * Search for appropriate signature, RSDT or XSDT */ - if (acpi_gbl_RSDP->revision < 2) { + if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) { no_match = ACPI_STRNCMP ((char *) table_ptr, RSDT_SIG, sizeof (RSDT_SIG) -1); } @@ -236,11 +238,11 @@ acpi_tb_validate_rsdt ( acpi_gbl_RSDP->rsdt_physical_address, (void *) (acpi_native_uint) acpi_gbl_RSDP->rsdt_physical_address)); - if (acpi_gbl_RSDP->revision < 2) { - ACPI_REPORT_ERROR (("Looking for RSDT (RSDP->Rev < 2)\n")) + if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) { + ACPI_REPORT_ERROR (("Looking for RSDT\n")) } else { - ACPI_REPORT_ERROR (("Looking for XSDT (RSDP->Rev >= 2)\n")) + ACPI_REPORT_ERROR (("Looking for XSDT\n")) } ACPI_DUMP_BUFFER ((char *) table_ptr, 48); diff --git a/drivers/acpi/tables/tbxfroot.c b/drivers/acpi/tables/tbxfroot.c index 198997aa7fbe..fe9c8317df46 100644 --- a/drivers/acpi/tables/tbxfroot.c +++ b/drivers/acpi/tables/tbxfroot.c @@ -287,9 +287,11 @@ acpi_get_firmware_table ( * requested table */ for (i = 0, j = 0; i < table_count; i++) { - /* Get the next table pointer, handle RSDT vs. XSDT */ - - if (acpi_gbl_RSDP->revision < 2) { + /* + * Get the next table pointer, handle RSDT vs. XSDT + * RSDT pointers are 32 bits, XSDT pointers are 64 bits + */ + if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) { address.pointer.value = (ACPI_CAST_PTR ( RSDT_DESCRIPTOR, rsdt_info->pointer))->table_offset_entry[i]; } -- cgit v1.2.2 From f9f4601f331aa1226d7a798a01950efbb388f07f Mon Sep 17 00:00:00 2001 From: Robert Moore Date: Fri, 8 Jul 2005 00:00:00 -0400 Subject: ACPICA 20050708 from Bob Moore The use of the CPU stack in the debug version of the subsystem has been considerably reduced. Previously, a debug structure was declared in every function that used the debug macros. This structure has been removed in favor of declaring the individual elements as parameters to the debug functions. This reduces the cumulative stack use during nested execution of ACPI function calls at the cost of a small increase in the code size of the debug version of the subsystem. With assistance from Alexey Starikovskiy and Len Brown. Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent headers to define a macro that will return the current function name at runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the compiler-dependent header, the function name is saved on the CPU stack (one pointer per function.) This mechanism is used because apparently there exists no standard ANSI-C defined macro that that returns the function name. Alexey Starikovskiy redesigned and reimplemented the "Owner ID" mechanism used to track namespace objects created/deleted by ACPI tables and control method execution. A bitmap is now used to allocate and free the IDs, thus solving the wraparound problem present in the previous implementation. The size of the namespace node descriptor was reduced by 2 bytes as a result. Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield flag definitions within the headers for the predefined ACPI tables. These have been replaced by UINT8_BIT in order to increase the code portability of the subsystem. If the use of UINT8 remains a problem, we may be forced to eliminate bitfields entirely because of a lack of portability. Alexey Starikovksiy enhanced the performance of acpi_ut_update_object_reference. This is a frequently used function and this improvement increases the performance of the entire subsystem. Alexey Starikovskiy fixed several possible memory leaks and the inverse - premature object deletion. Signed-off-by: Len Brown --- drivers/acpi/tables/tbinstal.c | 12 +++-- drivers/acpi/tables/tbrsdt.c | 25 ++-------- drivers/acpi/tables/tbxface.c | 3 +- drivers/acpi/tables/tbxfroot.c | 106 ++++++++++++++++++++++++----------------- 4 files changed, 75 insertions(+), 71 deletions(-) (limited to 'drivers/acpi/tables') diff --git a/drivers/acpi/tables/tbinstal.c b/drivers/acpi/tables/tbinstal.c index 629b64c8193d..2ad72f204551 100644 --- a/drivers/acpi/tables/tbinstal.c +++ b/drivers/acpi/tables/tbinstal.c @@ -251,6 +251,7 @@ acpi_tb_init_table_descriptor ( { struct acpi_table_list *list_head; struct acpi_table_desc *table_desc; + acpi_status status; ACPI_FUNCTION_TRACE_U32 ("tb_init_table_descriptor", table_type); @@ -263,6 +264,13 @@ acpi_tb_init_table_descriptor ( return_ACPI_STATUS (AE_NO_MEMORY); } + /* Get a new owner ID for the table */ + + status = acpi_ut_allocate_owner_id (&table_desc->owner_id); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + /* Install the table into the global data structure */ list_head = &acpi_gbl_table_lists[table_type]; @@ -325,8 +333,6 @@ acpi_tb_init_table_descriptor ( table_desc->aml_start = (u8 *) (table_desc->pointer + 1), table_desc->aml_length = (u32) (table_desc->length - (u32) sizeof (struct acpi_table_header)); - table_desc->table_id = acpi_ut_allocate_owner_id ( - ACPI_OWNER_TYPE_TABLE); table_desc->loaded_into_namespace = FALSE; /* @@ -339,7 +345,7 @@ acpi_tb_init_table_descriptor ( /* Return Data */ - table_info->table_id = table_desc->table_id; + table_info->owner_id = table_desc->owner_id; table_info->installed_desc = table_desc; return_ACPI_STATUS (AE_OK); diff --git a/drivers/acpi/tables/tbrsdt.c b/drivers/acpi/tables/tbrsdt.c index 13c6ddb2f546..069d498465d0 100644 --- a/drivers/acpi/tables/tbrsdt.c +++ b/drivers/acpi/tables/tbrsdt.c @@ -96,32 +96,13 @@ acpi_tb_verify_rsdp ( return_ACPI_STATUS (AE_BAD_PARAMETER); } - /* - * The signature and checksum must both be correct - */ - if (ACPI_STRNCMP ((char *) rsdp, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) { - /* Nope, BAD Signature */ - - status = AE_BAD_SIGNATURE; - goto cleanup; - } - - /* Check the standard checksum */ + /* Verify RSDP signature and checksum */ - if (acpi_tb_checksum (rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) { - status = AE_BAD_CHECKSUM; + status = acpi_tb_validate_rsdp (rsdp); + if (ACPI_FAILURE (status)) { goto cleanup; } - /* Check extended checksum if table version >= 2 */ - - if (rsdp->revision >= 2) { - if (acpi_tb_checksum (rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0) { - status = AE_BAD_CHECKSUM; - goto cleanup; - } - } - /* The RSDP supplied is OK */ table_info.pointer = ACPI_CAST_PTR (struct acpi_table_header, rsdp); diff --git a/drivers/acpi/tables/tbxface.c b/drivers/acpi/tables/tbxface.c index 0c0b9085dbeb..ca2dbdd23ed3 100644 --- a/drivers/acpi/tables/tbxface.c +++ b/drivers/acpi/tables/tbxface.c @@ -260,8 +260,7 @@ acpi_unload_table ( * "Scope" operator. Thus, we need to track ownership by an ID, not * simply a position within the hierarchy */ - acpi_ns_delete_namespace_by_owner (table_desc->table_id); - + acpi_ns_delete_namespace_by_owner (table_desc->owner_id); table_desc = table_desc->next; } diff --git a/drivers/acpi/tables/tbxfroot.c b/drivers/acpi/tables/tbxfroot.c index fe9c8317df46..abb4c9346560 100644 --- a/drivers/acpi/tables/tbxfroot.c +++ b/drivers/acpi/tables/tbxfroot.c @@ -63,6 +63,51 @@ acpi_tb_scan_memory_for_rsdp ( u32 length); +/******************************************************************************* + * + * FUNCTION: acpi_tb_validate_rsdp + * + * PARAMETERS: Rsdp - Pointer to unvalidated RSDP + * + * RETURN: Status + * + * DESCRIPTION: Validate the RSDP (ptr) + * + ******************************************************************************/ + +acpi_status +acpi_tb_validate_rsdp ( + struct rsdp_descriptor *rsdp) +{ + ACPI_FUNCTION_ENTRY (); + + + /* + * The signature and checksum must both be correct + */ + if (ACPI_STRNCMP ((char *) rsdp, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) { + /* Nope, BAD Signature */ + + return (AE_BAD_SIGNATURE); + } + + /* Check the standard checksum */ + + if (acpi_tb_checksum (rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) { + return (AE_BAD_CHECKSUM); + } + + /* Check extended checksum if table version >= 2 */ + + if ((rsdp->revision >= 2) && + (acpi_tb_checksum (rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0)) { + return (AE_BAD_CHECKSUM); + } + + return (AE_OK); +} + + /******************************************************************************* * * FUNCTION: acpi_tb_find_table @@ -218,19 +263,11 @@ acpi_get_firmware_table ( acpi_gbl_RSDP = address.pointer.logical; } - /* The signature and checksum must both be correct */ - - if (ACPI_STRNCMP ((char *) acpi_gbl_RSDP, RSDP_SIG, - sizeof (RSDP_SIG)-1) != 0) { - /* Nope, BAD Signature */ + /* The RDSP signature and checksum must both be correct */ - return_ACPI_STATUS (AE_BAD_SIGNATURE); - } - - if (acpi_tb_checksum (acpi_gbl_RSDP, ACPI_RSDP_CHECKSUM_LENGTH) != 0) { - /* Nope, BAD Checksum */ - - return_ACPI_STATUS (AE_BAD_CHECKSUM); + status = acpi_tb_validate_rsdp (acpi_gbl_RSDP); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); } } @@ -414,9 +451,9 @@ acpi_tb_scan_memory_for_rsdp ( u8 *start_address, u32 length) { + acpi_status status; u8 *mem_rover; u8 *end_address; - u8 checksum; ACPI_FUNCTION_TRACE ("tb_scan_memory_for_rsdp"); @@ -428,45 +465,25 @@ acpi_tb_scan_memory_for_rsdp ( for (mem_rover = start_address; mem_rover < end_address; mem_rover += ACPI_RSDP_SCAN_STEP) { - /* The signature and checksum must both be correct */ + /* The RSDP signature and checksum must both be correct */ - if (ACPI_STRNCMP ((char *) mem_rover, - RSDP_SIG, sizeof (RSDP_SIG) - 1) != 0) { - /* No signature match, keep looking */ - - continue; - } - - /* Signature matches, check the appropriate checksum */ - - if ((ACPI_CAST_PTR (struct rsdp_descriptor, mem_rover))->revision < 2) { - /* ACPI version 1.0 */ - - checksum = acpi_tb_checksum (mem_rover, ACPI_RSDP_CHECKSUM_LENGTH); - } - else { - /* Post ACPI 1.0, use extended_checksum */ - - checksum = acpi_tb_checksum (mem_rover, ACPI_RSDP_XCHECKSUM_LENGTH); - } - - if (checksum == 0) { - /* Checksum valid, we have found a valid RSDP */ + status = acpi_tb_validate_rsdp (ACPI_CAST_PTR (struct rsdp_descriptor, mem_rover)); + if (ACPI_SUCCESS (status)) { + /* Sig and checksum valid, we have found a real RSDP */ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "RSDP located at physical address %p\n", mem_rover)); return_PTR (mem_rover); } - ACPI_DEBUG_PRINT ((ACPI_DB_INFO, - "Found an RSDP at physical address %p, but it has a bad checksum\n", - mem_rover)); + /* No sig match or bad checksum, keep searching */ } /* Searched entire block, no RSDP was found */ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, - "Searched entire block, no valid RSDP was found.\n")); + "Searched entire block from %p, valid RSDP was not found\n", + start_address)); return_PTR (NULL); } @@ -554,7 +571,7 @@ acpi_tb_find_rsdp ( acpi_os_unmap_memory (table_ptr, ACPI_EBDA_WINDOW_SIZE); if (mem_rover) { - /* Found it, return the physical address */ + /* Return the physical address */ physical_address += ACPI_PTR_DIFF (mem_rover, table_ptr); @@ -583,7 +600,7 @@ acpi_tb_find_rsdp ( acpi_os_unmap_memory (table_ptr, ACPI_HI_RSDP_WINDOW_SIZE); if (mem_rover) { - /* Found it, return the physical address */ + /* Return the physical address */ physical_address = ACPI_HI_RSDP_WINDOW_BASE + ACPI_PTR_DIFF (mem_rover, table_ptr); @@ -614,7 +631,7 @@ acpi_tb_find_rsdp ( ACPI_PHYSADDR_TO_PTR (physical_address), ACPI_EBDA_WINDOW_SIZE); if (mem_rover) { - /* Found it, return the physical address */ + /* Return the physical address */ table_info->physical_address = ACPI_TO_INTEGER (mem_rover); return_ACPI_STATUS (AE_OK); @@ -634,8 +651,9 @@ acpi_tb_find_rsdp ( } } - /* RSDP signature was not found */ + /* A valid RSDP was not found */ + ACPI_REPORT_ERROR (("No valid RSDP was found\n")); return_ACPI_STATUS (AE_NOT_FOUND); } -- cgit v1.2.2 From 0c9938cc75057c0fca1af55a55dcfc2842436695 Mon Sep 17 00:00:00 2001 From: Robert Moore Date: Fri, 29 Jul 2005 15:15:00 -0700 Subject: [ACPI] ACPICA 20050729 from Bob Moore Implemented support to ignore an attempt to install/load a particular ACPI table more than once. Apparently there exists BIOS code that repeatedly attempts to load the same SSDT upon certain events. Thanks to Venkatesh Pallipadi. Restructured the main interface to the AML parser in order to correctly handle all exceptional conditions. This will prevent leakage of the OwnerId resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on some machines. Thanks to Alexey Starikovskiy. Support for "module level code" has been disabled in this version due to a number of issues that have appeared on various machines. The support can be enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem compilation. When the issues are fully resolved, the code will be enabled by default again. Modified the internal functions for debug print support to define the FunctionName parameter as a (const char *) for compatibility with compiler built-in macros such as __FUNCTION__, etc. Linted the entire ACPICA source tree for both 32-bit and 64-bit. Signed-off-by: Robert Moore Signed-off-by: Len Brown --- drivers/acpi/tables/tbinstal.c | 22 ++++++++++---- drivers/acpi/tables/tbutils.c | 67 ++++++++++++++++++++++++++++++++++++++++-- drivers/acpi/tables/tbxface.c | 14 +++++++++ drivers/acpi/tables/tbxfroot.c | 4 +-- 4 files changed, 96 insertions(+), 11 deletions(-) (limited to 'drivers/acpi/tables') diff --git a/drivers/acpi/tables/tbinstal.c b/drivers/acpi/tables/tbinstal.c index 2ad72f204551..698799901f55 100644 --- a/drivers/acpi/tables/tbinstal.c +++ b/drivers/acpi/tables/tbinstal.c @@ -124,9 +124,7 @@ acpi_tb_match_signature ( * * RETURN: Status * - * DESCRIPTION: Load and validate all tables other than the RSDT. The RSDT must - * already be loaded and validated. - * Install the table into the global data structs. + * DESCRIPTION: Install the table into the global data structures. * ******************************************************************************/ @@ -136,6 +134,7 @@ acpi_tb_install_table ( { acpi_status status; + ACPI_FUNCTION_TRACE ("tb_install_table"); @@ -143,22 +142,33 @@ acpi_tb_install_table ( status = acpi_ut_acquire_mutex (ACPI_MTX_TABLES); if (ACPI_FAILURE (status)) { - ACPI_REPORT_ERROR (("Could not acquire table mutex for [%4.4s], %s\n", - table_info->pointer->signature, acpi_format_exception (status))); + ACPI_REPORT_ERROR (("Could not acquire table mutex, %s\n", + acpi_format_exception (status))); return_ACPI_STATUS (status); } + /* + * Ignore a table that is already installed. For example, some BIOS + * ASL code will repeatedly attempt to load the same SSDT. + */ + status = acpi_tb_is_table_installed (table_info); + if (ACPI_FAILURE (status)) { + goto unlock_and_exit; + } + /* Install the table into the global data structure */ status = acpi_tb_init_table_descriptor (table_info->type, table_info); if (ACPI_FAILURE (status)) { - ACPI_REPORT_ERROR (("Could not install ACPI table [%4.4s], %s\n", + ACPI_REPORT_ERROR (("Could not install table [%4.4s], %s\n", table_info->pointer->signature, acpi_format_exception (status))); } ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s located at %p\n", acpi_gbl_table_data[table_info->type].name, table_info->pointer)); + +unlock_and_exit: (void) acpi_ut_release_mutex (ACPI_MTX_TABLES); return_ACPI_STATUS (status); } diff --git a/drivers/acpi/tables/tbutils.c b/drivers/acpi/tables/tbutils.c index e69d01d443d2..6fc1e36e6042 100644 --- a/drivers/acpi/tables/tbutils.c +++ b/drivers/acpi/tables/tbutils.c @@ -59,6 +59,67 @@ acpi_tb_handle_to_object ( #endif +/******************************************************************************* + * + * FUNCTION: acpi_tb_is_table_installed + * + * PARAMETERS: new_table_desc - Descriptor for new table being installed + * + * RETURN: Status - AE_ALREADY_EXISTS if the table is already installed + * + * DESCRIPTION: Determine if an ACPI table is already installed + * + * MUTEX: Table data structures should be locked + * + ******************************************************************************/ + +acpi_status +acpi_tb_is_table_installed ( + struct acpi_table_desc *new_table_desc) +{ + struct acpi_table_desc *table_desc; + + + ACPI_FUNCTION_TRACE ("tb_is_table_installed"); + + + /* Get the list descriptor and first table descriptor */ + + table_desc = acpi_gbl_table_lists[new_table_desc->type].next; + + /* Examine all installed tables of this type */ + + while (table_desc) { + /* Compare Revision and oem_table_id */ + + if ((table_desc->loaded_into_namespace) && + (table_desc->pointer->revision == + new_table_desc->pointer->revision) && + (!ACPI_MEMCMP (table_desc->pointer->oem_table_id, + new_table_desc->pointer->oem_table_id, 8))) { + /* This table is already installed */ + + ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, + "Table [%4.4s] already installed: Rev %X oem_table_id [%8.8s]\n", + new_table_desc->pointer->signature, + new_table_desc->pointer->revision, + new_table_desc->pointer->oem_table_id)); + + new_table_desc->owner_id = table_desc->owner_id; + new_table_desc->installed_desc = table_desc; + + return_ACPI_STATUS (AE_ALREADY_EXISTS); + } + + /* Get next table on the list */ + + table_desc = table_desc->next; + } + + return_ACPI_STATUS (AE_OK); +} + + /******************************************************************************* * * FUNCTION: acpi_tb_validate_table_header @@ -157,7 +218,7 @@ acpi_tb_verify_table_checksum ( /* Compute the checksum on the table */ - checksum = acpi_tb_checksum (table_header, table_header->length); + checksum = acpi_tb_generate_checksum (table_header, table_header->length); /* Return the appropriate exception */ @@ -175,7 +236,7 @@ acpi_tb_verify_table_checksum ( /******************************************************************************* * - * FUNCTION: acpi_tb_checksum + * FUNCTION: acpi_tb_generate_checksum * * PARAMETERS: Buffer - Buffer to checksum * Length - Size of the buffer @@ -187,7 +248,7 @@ acpi_tb_verify_table_checksum ( ******************************************************************************/ u8 -acpi_tb_checksum ( +acpi_tb_generate_checksum ( void *buffer, u32 length) { diff --git a/drivers/acpi/tables/tbxface.c b/drivers/acpi/tables/tbxface.c index ca2dbdd23ed3..e18a05d1b9b3 100644 --- a/drivers/acpi/tables/tbxface.c +++ b/drivers/acpi/tables/tbxface.c @@ -182,10 +182,23 @@ acpi_load_table ( return_ACPI_STATUS (status); } + /* Check signature for a valid table type */ + + status = acpi_tb_recognize_table (&table_info, ACPI_TABLE_ALL); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + /* Install the new table into the local data structures */ status = acpi_tb_install_table (&table_info); if (ACPI_FAILURE (status)) { + if (status == AE_ALREADY_EXISTS) { + /* Table already exists, no error */ + + status = AE_OK; + } + /* Free table allocated by acpi_tb_get_table_body */ acpi_tb_delete_single_table (&table_info); @@ -261,6 +274,7 @@ acpi_unload_table ( * simply a position within the hierarchy */ acpi_ns_delete_namespace_by_owner (table_desc->owner_id); + acpi_ut_release_owner_id (&table_desc->owner_id); table_desc = table_desc->next; } diff --git a/drivers/acpi/tables/tbxfroot.c b/drivers/acpi/tables/tbxfroot.c index abb4c9346560..87dccdda9ae2 100644 --- a/drivers/acpi/tables/tbxfroot.c +++ b/drivers/acpi/tables/tbxfroot.c @@ -93,14 +93,14 @@ acpi_tb_validate_rsdp ( /* Check the standard checksum */ - if (acpi_tb_checksum (rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) { + if (acpi_tb_generate_checksum (rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) { return (AE_BAD_CHECKSUM); } /* Check extended checksum if table version >= 2 */ if ((rsdp->revision >= 2) && - (acpi_tb_checksum (rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0)) { + (acpi_tb_generate_checksum (rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0)) { return (AE_BAD_CHECKSUM); } -- cgit v1.2.2