Merge branch 'misc' into release

Documentation/acpi/debug.txt

@@ -0,0 +1,148 @@
+			ACPI Debug Output
+
+
+The ACPI CA, the Linux ACPI core, and some ACPI drivers can generate debug
+output.  This document describes how to use this facility.
+
+Compile-time configuration
+--------------------------
+
+ACPI debug output is globally enabled by CONFIG_ACPI_DEBUG.  If this config
+option is turned off, the debug messages are not even built into the
+kernel.
+
+Boot- and run-time configuration
+--------------------------------
+
+When CONFIG_ACPI_DEBUG=y, you can select the component and level of messages
+you're interested in.  At boot-time, use the acpi.debug_layer and
+acpi.debug_level kernel command line options.  After boot, you can use the
+debug_layer and debug_level files in /sys/module/acpi/parameters/ to control
+the debug messages.
+
+debug_layer (component)
+-----------------------
+
+The "debug_layer" is a mask that selects components of interest, e.g., a
+specific driver or part of the ACPI interpreter.  To build the debug_layer
+bitmask, look for the "#define _COMPONENT" in an ACPI source file.
+
+You can set the debug_layer mask at boot-time using the acpi.debug_layer
+command line argument, and you can change it after boot by writing values
+to /sys/module/acpi/parameters/debug_layer.
+
+The possible components are defined in include/acpi/acoutput.h and
+include/acpi/acpi_drivers.h.  Reading /sys/module/acpi/parameters/debug_layer
+shows the supported mask values, currently these:
+
+    ACPI_UTILITIES                  0x00000001
+    ACPI_HARDWARE                   0x00000002
+    ACPI_EVENTS                     0x00000004
+    ACPI_TABLES                     0x00000008
+    ACPI_NAMESPACE                  0x00000010
+    ACPI_PARSER                     0x00000020
+    ACPI_DISPATCHER                 0x00000040
+    ACPI_EXECUTER                   0x00000080
+    ACPI_RESOURCES                  0x00000100
+    ACPI_CA_DEBUGGER                0x00000200
+    ACPI_OS_SERVICES                0x00000400
+    ACPI_CA_DISASSEMBLER            0x00000800
+    ACPI_COMPILER                   0x00001000
+    ACPI_TOOLS                      0x00002000
+    ACPI_BUS_COMPONENT              0x00010000
+    ACPI_AC_COMPONENT               0x00020000
+    ACPI_BATTERY_COMPONENT          0x00040000
+    ACPI_BUTTON_COMPONENT           0x00080000
+    ACPI_SBS_COMPONENT              0x00100000
+    ACPI_FAN_COMPONENT              0x00200000
+    ACPI_PCI_COMPONENT              0x00400000
+    ACPI_POWER_COMPONENT            0x00800000
+    ACPI_CONTAINER_COMPONENT        0x01000000
+    ACPI_SYSTEM_COMPONENT           0x02000000
+    ACPI_THERMAL_COMPONENT          0x04000000
+    ACPI_MEMORY_DEVICE_COMPONENT    0x08000000
+    ACPI_VIDEO_COMPONENT            0x10000000
+    ACPI_PROCESSOR_COMPONENT        0x20000000
+
+debug_level
+-----------
+
+The "debug_level" is a mask that selects different types of messages, e.g.,
+those related to initialization, method execution, informational messages, etc.
+To build debug_level, look at the level specified in an ACPI_DEBUG_PRINT()
+statement.
+
+The ACPI interpreter uses several different levels, but the Linux
+ACPI core and ACPI drivers generally only use ACPI_LV_INFO.
+
+You can set the debug_level mask at boot-time using the acpi.debug_level
+command line argument, and you can change it after boot by writing values
+to /sys/module/acpi/parameters/debug_level.
+
+The possible levels are defined in include/acpi/acoutput.h.  Reading
+/sys/module/acpi/parameters/debug_level shows the supported mask values,
+currently these:
+
+    ACPI_LV_INIT                    0x00000001
+    ACPI_LV_DEBUG_OBJECT            0x00000002
+    ACPI_LV_INFO                    0x00000004
+    ACPI_LV_INIT_NAMES              0x00000020
+    ACPI_LV_PARSE                   0x00000040
+    ACPI_LV_LOAD                    0x00000080
+    ACPI_LV_DISPATCH                0x00000100
+    ACPI_LV_EXEC                    0x00000200
+    ACPI_LV_NAMES                   0x00000400
+    ACPI_LV_OPREGION                0x00000800
+    ACPI_LV_BFIELD                  0x00001000
+    ACPI_LV_TABLES                  0x00002000
+    ACPI_LV_VALUES                  0x00004000
+    ACPI_LV_OBJECTS                 0x00008000
+    ACPI_LV_RESOURCES               0x00010000
+    ACPI_LV_USER_REQUESTS           0x00020000
+    ACPI_LV_PACKAGE                 0x00040000
+    ACPI_LV_ALLOCATIONS             0x00100000
+    ACPI_LV_FUNCTIONS               0x00200000
+    ACPI_LV_OPTIMIZATIONS           0x00400000
+    ACPI_LV_MUTEX                   0x01000000
+    ACPI_LV_THREADS                 0x02000000
+    ACPI_LV_IO                      0x04000000
+    ACPI_LV_INTERRUPTS              0x08000000
+    ACPI_LV_AML_DISASSEMBLE         0x10000000
+    ACPI_LV_VERBOSE_INFO            0x20000000
+    ACPI_LV_FULL_TABLES             0x40000000
+    ACPI_LV_EVENTS                  0x80000000
+
+Examples
+--------
+
+For example, drivers/acpi/bus.c contains this:
+
+    #define _COMPONENT              ACPI_BUS_COMPONENT
+    ...
+    ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
+
+To turn on this message, set the ACPI_BUS_COMPONENT bit in acpi.debug_layer
+and the ACPI_LV_INFO bit in acpi.debug_level.  (The ACPI_DEBUG_PRINT
+statement uses ACPI_DB_INFO, which is macro based on the ACPI_LV_INFO
+definition.)
+
+Enable all AML "Debug" output (stores to the Debug object while interpreting
+AML) during boot:
+
+    acpi.debug_layer=0xffffffff acpi.debug_level=0x2
+
+Enable PCI and PCI interrupt routing debug messages:
+
+    acpi.debug_layer=0x400000 acpi.debug_level=0x4
+
+Enable all ACPI hardware-related messages:
+
+    acpi.debug_layer=0x2 acpi.debug_level=0xffffffff
+
+Enable all ACPI_DB_INFO messages after boot:
+
+    # echo 0x4 > /sys/module/acpi/parameters/debug_level
+
+Show all valid component values:
+
+    # cat /sys/module/acpi/parameters/debug_layer

Documentation/kernel-parameters.txt

@@ -198,59 +198,30 @@ and is between 256 and 4096 characters. It is defined in the file
 			that require a timer override, but don't have
 			HPET
 
-	acpi.debug_layer=	[HW,ACPI]
+	acpi.debug_layer=	[HW,ACPI,ACPI_DEBUG]
+	acpi.debug_level=	[HW,ACPI,ACPI_DEBUG]
 			Format: <int>
-			Each bit of the <int> indicates an ACPI debug layer,
+			CONFIG_ACPI_DEBUG must be enabled to produce any ACPI
-			1: enable, 0: disable. It is useful for boot time
+			debug output.  Bits in debug_layer correspond to a
-			debugging. After system has booted up, it can be set
+			_COMPONENT in an ACPI source file, e.g.,
-			via /sys/module/acpi/parameters/debug_layer.
+			    #define _COMPONENT ACPI_PCI_COMPONENT
-			CONFIG_ACPI_DEBUG must be enabled for this to produce any output.
+			Bits in debug_level correspond to a level in
-			Available bits (add the numbers together) to enable debug output
+			ACPI_DEBUG_PRINT statements, e.g.,
-			for specific parts of the ACPI subsystem:
+			    ACPI_DEBUG_PRINT((ACPI_DB_INFO, ...
-			0x01 utilities 0x02 hardware 0x04 events 0x08 tables
+			See Documentation/acpi/debug.txt for more information
-			0x10 namespace 0x20 parser 0x40 dispatcher
+			about debug layers and levels.
-			0x80 executer 0x100 resources 0x200 acpica debugger
-			0x400 os services 0x800 acpica disassembler.
-			The number can be in decimal or prefixed with 0x in hex.
-			Warning: Many of these options can produce a lot of
-			output and make your system unusable. Be very careful.
 
-	acpi.debug_level=	[HW,ACPI]
+			Enable AML "Debug" output, i.e., stores to the Debug
-			Format: <int>
+			object while interpreting AML:
-			Each bit of the <int> indicates an ACPI debug level,
+			    acpi.debug_layer=0xffffffff acpi.debug_level=0x2
-			which corresponds to the level in an ACPI_DEBUG_PRINT
+			Enable PCI/PCI interrupt routing info messages:
-			statement.  After system has booted up, this mask
+			    acpi.debug_layer=0x400000 acpi.debug_level=0x4
-			can be set via /sys/module/acpi/parameters/debug_level.
+			Enable all messages related to ACPI hardware:
+			    acpi.debug_layer=0x2 acpi.debug_level=0xffffffff
 
-			CONFIG_ACPI_DEBUG must be enabled for this to produce
+			Some values produce so much output that the system is
-			any output.  The number can be in decimal or prefixed
+			unusable.  The "log_buf_len" parameter may be useful
-			with 0x in hex.  Some of these options produce so much
+			if you need to capture more output.
-			output that the system is unusable.
-
-			The following global components are defined by the
-			ACPI CA:
-			       0x01 error
-			       0x02 warn
-			       0x04 init
-			       0x08 debug object
-			       0x10 info
-			       0x20 init names
-			       0x40 parse
-			       0x80 load
-			      0x100 dispatch
-			      0x200 execute
-			      0x400 names
-			      0x800 operation region
-			     0x1000 bfield
-			     0x2000 tables
-			     0x4000 values
-			     0x8000 objects
-			    0x10000 resources
-			    0x20000 user requests
-			    0x40000 package
- 			The number can be in decimal or prefixed with 0x in hex.
- 			Warning: Many of these options can produce a lot of
- 			output and make your system unusable. Be very careful.
 
  	acpi.power_nocheck=	[HW,ACPI]
  			Format: 1/0 enable/disable the check of power state.

MAINTAINERS

@@ -2185,6 +2185,13 @@ M:	adaplas@gmail.com
 L:	linux-fbdev-devel@lists.sourceforge.net (moderated for non-subscribers)
 S:	Maintained
 
+INTEL MENLOW THERMAL DRIVER
+P:	Sujith Thomas
+M:	sujith.thomas@intel.com
+L:	linux-acpi@vger.kernel.org
+W:	http://www.lesswatts.org/projects/acpi/
+S:	Supported
+
 INTEL IA32 MICROCODE UPDATE SUPPORT
 P:	Tigran Aivazian
 M:	tigran@aivazian.fsnet.co.uk
@@ -3346,7 +3353,9 @@ S:	Maintained
 
 PNP SUPPORT
 P:	Adam Belay
-M:	ambx1@neo.rr.com
+M:	abelay@mit.edu
+P:	Bjorn Helgaas
+M:	bjorn.helgaas@hp.com
 S:	Maintained
 
 PNXxxxx I2C DRIVER

arch/x86/include/asm/acpi.h

@@ -113,7 +113,6 @@ static inline void acpi_disable_pci(void)
 	acpi_pci_disabled = 1;
 	acpi_noirq_set();
 }
-extern int acpi_irq_balance_set(char *str);
 
 /* routines for saving/restoring kernel state */
 extern int acpi_save_state_mem(void);

arch/x86/kernel/acpi/boot.c

@@ -1343,7 +1343,6 @@ static void __init acpi_process_madt(void)
 			error = acpi_parse_madt_ioapic_entries();
 			if (!error) {
 				acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
-				acpi_irq_balance_set(NULL);
 				acpi_ioapic = 1;
 
 				smp_found_config = 1;

drivers/acpi/Kconfig

@@ -312,9 +312,13 @@ config ACPI_DEBUG
 	bool "Debug Statements"
 	default n
 	help
-	  The ACPI driver can optionally report errors with a great deal
+	  The ACPI subsystem can produce debug output.  Saying Y enables this
-	  of verbosity. Saying Y enables these statements. This will increase
+	  output and increases the kernel size by around 50K.
-	  your kernel size by around 50K.
+
+	  Use the acpi.debug_layer and acpi.debug_level kernel command-line
+	  parameters documented in Documentation/acpi/debug.txt and
+	  Documentation/kernel-parameters.txt to control the type and
+	  amount of debug output.
 
 config ACPI_DEBUG_FUNC_TRACE
 	bool "Additionally enable ACPI function tracing"
@@ -324,14 +328,6 @@ config ACPI_DEBUG_FUNC_TRACE
 	  ACPI Debug Statements slow down ACPI processing. Function trace
 	  is about half of the penalty and is rarely useful.
 
-config ACPI_EC
-	bool
-	default y
-	help
-	  This driver is required on some systems for the proper operation of
-	  the battery and thermal drivers.  If you are compiling for a 
-	  mobile system, say Y.
-
 config ACPI_PCI_SLOT
 	tristate "PCI slot detection driver"
 	default n
@@ -341,10 +337,6 @@ config ACPI_PCI_SLOT
 	  help you correlate PCI bus addresses with the physical geography
 	  of your slots. If you are unsure, say N.
 
-config ACPI_POWER
-	bool
-	default y
-
 config ACPI_SYSTEM
 	bool
 	default y

drivers/acpi/Makefile

@@ -39,7 +39,7 @@ obj-y				+= sleep/
 obj-y				+= bus.o glue.o
 obj-y				+= scan.o
 # Keep EC driver first. Initialization of others depend on it.
-obj-$(CONFIG_ACPI_EC)		+= ec.o
+obj-y				+= ec.o
 obj-$(CONFIG_ACPI_AC) 		+= ac.o
 obj-$(CONFIG_ACPI_BATTERY)	+= battery.o
 obj-$(CONFIG_ACPI_BUTTON)	+= button.o
@@ -51,7 +51,7 @@ obj-$(CONFIG_ACPI_PCI_SLOT)	+= pci_slot.o
 obj-$(CONFIG_ACPI_PROCESSOR)	+= processor.o
 obj-$(CONFIG_ACPI_CONTAINER)	+= container.o
 obj-$(CONFIG_ACPI_THERMAL)	+= thermal.o
-obj-$(CONFIG_ACPI_POWER)	+= power.o
+obj-y				+= power.o
 obj-$(CONFIG_ACPI_SYSTEM)	+= system.o event.o
 obj-$(CONFIG_ACPI_DEBUG)	+= debug.o
 obj-$(CONFIG_ACPI_NUMA)		+= numa.o

drivers/acpi/ac.c

@@ -37,7 +37,6 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
-#define ACPI_AC_COMPONENT		0x00020000
 #define ACPI_AC_CLASS			"ac_adapter"
 #define ACPI_AC_DEVICE_NAME		"AC Adapter"
 #define ACPI_AC_FILE_STATE		"state"

drivers/acpi/acpi_memhotplug.c

@@ -32,7 +32,6 @@
 #include <linux/memory_hotplug.h>
 #include <acpi/acpi_drivers.h>
 
-#define ACPI_MEMORY_DEVICE_COMPONENT		0x08000000UL
 #define ACPI_MEMORY_DEVICE_CLASS		"memory"
 #define ACPI_MEMORY_DEVICE_HID			"PNP0C80"
 #define ACPI_MEMORY_DEVICE_NAME			"Hotplug Mem Device"

drivers/acpi/battery.c

@@ -46,7 +46,6 @@
 
 #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
 
-#define ACPI_BATTERY_COMPONENT		0x00040000
 #define ACPI_BATTERY_CLASS		"battery"
 #define ACPI_BATTERY_DEVICE_NAME	"Battery"
 #define ACPI_BATTERY_NOTIFY_STATUS	0x80

drivers/acpi/bus.c

@@ -688,6 +688,14 @@ void __init acpi_early_init(void)
 	if (acpi_disabled)
 		return;
 
+	/*
+	 * ACPI CA initializes acpi_dbg_level to non-zero, which means
+	 * we get debug output merely by turning on CONFIG_ACPI_DEBUG.
+	 * Turn it off so we don't get output unless the user specifies
+	 * acpi.debug_level.
+	 */
+	acpi_dbg_level = 0;
+
 	printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
 
 	/* enable workarounds, unless strict ACPI spec. compliance */
@@ -774,7 +782,7 @@ static int __init acpi_bus_init(void)
 		       "Unable to initialize ACPI OS objects\n");
 		goto error1;
 	}
-#ifdef CONFIG_ACPI_EC
+
 	/*
 	 * ACPI 2.0 requires the EC driver to be loaded and work before
 	 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
@@ -785,7 +793,6 @@ static int __init acpi_bus_init(void)
 	 */
 	status = acpi_ec_ecdt_probe();
 	/* Ignore result. Not having an ECDT is not fatal. */
-#endif
 
 	status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
 	if (ACPI_FAILURE(status)) {

drivers/acpi/button.c

@@ -33,7 +33,6 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
-#define ACPI_BUTTON_COMPONENT		0x00080000
 #define ACPI_BUTTON_CLASS		"button"
 #define ACPI_BUTTON_FILE_INFO		"info"
 #define ACPI_BUTTON_FILE_STATE		"state"

drivers/acpi/cm_sbs.c

@@ -34,7 +34,6 @@
 ACPI_MODULE_NAME("cm_sbs");
 #define ACPI_AC_CLASS		"ac_adapter"
 #define ACPI_BATTERY_CLASS	"battery"
-#define ACPI_SBS_COMPONENT	0x00080000
 #define _COMPONENT		ACPI_SBS_COMPONENT
 static struct proc_dir_entry *acpi_ac_dir;
 static struct proc_dir_entry *acpi_battery_dir;
@@ -105,9 +104,3 @@ void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param)
 	return;
 }
 EXPORT_SYMBOL(acpi_unlock_battery_dir);
-
-static int __init acpi_cm_sbs_init(void)
-{
-	return 0;
-}
-subsys_initcall(acpi_cm_sbs_init);

drivers/acpi/container.c

@@ -41,7 +41,6 @@
 #define INSTALL_NOTIFY_HANDLER		1
 #define UNINSTALL_NOTIFY_HANDLER	2
 
-#define ACPI_CONTAINER_COMPONENT	0x01000000
 #define _COMPONENT			ACPI_CONTAINER_COMPONENT
 ACPI_MODULE_NAME("container");
 

drivers/acpi/debug.c

@@ -44,6 +44,21 @@ static const struct acpi_dlayer acpi_debug_layers[] = {
 	ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
 	ACPI_DEBUG_INIT(ACPI_COMPILER),
 	ACPI_DEBUG_INIT(ACPI_TOOLS),
+
+	ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
 };
 
 static const struct acpi_dlevel acpi_debug_levels[] = {

drivers/acpi/events/evgpe.c

@@ -289,8 +289,6 @@ acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
 	 */
 	status = acpi_hw_low_disable_gpe(gpe_event_info);
 	return_ACPI_STATUS(status);
-
-	return_ACPI_STATUS(AE_OK);
 }
 
 /*******************************************************************************

drivers/acpi/fan.c

@@ -34,7 +34,6 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
-#define ACPI_FAN_COMPONENT		0x00200000
 #define ACPI_FAN_CLASS			"fan"
 #define ACPI_FAN_FILE_STATE		"state"
 

drivers/acpi/pci_link.c

@@ -531,7 +531,7 @@ int __init acpi_irq_penalty_init(void)
 	return 0;
 }
 
-static int acpi_irq_balance;	/* 0: static, 1: balance */
+static int acpi_irq_balance = -1;	/* 0: static, 1: balance */
 
 static int acpi_pci_link_allocate(struct acpi_pci_link *link)
 {
@@ -950,10 +950,17 @@ device_initcall(irqrouter_init_sysfs);
 
 static int __init acpi_pci_link_init(void)
 {
-
 	if (acpi_noirq)
 		return 0;
 
+	if (acpi_irq_balance == -1) {
+		/* no command line switch: enable balancing in IOAPIC mode */
+		if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
+			acpi_irq_balance = 1;
+		else
+			acpi_irq_balance = 0;
+	}
+
 	acpi_link.count = 0;
 	INIT_LIST_HEAD(&acpi_link.entries);
 

drivers/acpi/pci_root.c

@@ -376,15 +376,9 @@ static int acpi_pci_root_remove(struct acpi_device *device, int type)
 
 static int __init acpi_pci_root_init(void)
 {
-
 	if (acpi_pci_disabled)
 		return 0;
 
-	/* DEBUG:
-	   acpi_dbg_layer = ACPI_PCI_COMPONENT;
-	   acpi_dbg_level = 0xFFFFFFFF;
-	 */
-
 	if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0)
 		return -ENODEV;
 

drivers/acpi/power.c

@@ -44,9 +44,8 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
-#define _COMPONENT		ACPI_POWER_COMPONENT
+#define _COMPONENT			ACPI_POWER_COMPONENT
 ACPI_MODULE_NAME("power");
-#define ACPI_POWER_COMPONENT		0x00800000
 #define ACPI_POWER_CLASS		"power_resource"
 #define ACPI_POWER_DEVICE_NAME		"Power Resource"
 #define ACPI_POWER_FILE_INFO		"info"