Merge branches 'release', 'acpica', 'bugzilla-10224', 'bugzilla-9772', 'bugzilla-9916', 'ec', 'eeepc', 'idle', 'misc', 'pm-legacy', 'sysfs-links-2.6.26', 'thermal', 'thinkpad' and 'video' into release

drivers/misc/Kconfig

@@ -22,6 +22,39 @@ config ATMEL_PWM
 	  purposes including software controlled power-efficent backlights
 	  on LCD displays, motor control, and waveform generation.
 
+config ATMEL_TCLIB
+	bool "Atmel AT32/AT91 Timer/Counter Library"
+	depends on (AVR32 || ARCH_AT91)
+	help
+	  Select this if you want a library to allocate the Timer/Counter
+	  blocks found on many Atmel processors.  This facilitates using
+	  these blocks by different drivers despite processor differences.
+
+config ATMEL_TCB_CLKSRC
+	bool "TC Block Clocksource"
+	depends on ATMEL_TCLIB && GENERIC_TIME
+	default y
+	help
+	  Select this to get a high precision clocksource based on a
+	  TC block with a 5+ MHz base clock rate.  Two timer channels
+	  are combined to make a single 32-bit timer.
+
+	  When GENERIC_CLOCKEVENTS is defined, the third timer channel
+	  may be used as a clock event device supporting oneshot mode
+	  (delays of up to two seconds) based on the 32 KiHz clock.
+
+config ATMEL_TCB_CLKSRC_BLOCK
+	int
+	depends on ATMEL_TCB_CLKSRC
+	prompt "TC Block" if ARCH_AT91RM9200 || ARCH_AT91SAM9260 || CPU_AT32AP700X
+	default 0
+	range 0 1
+	help
+	  Some chips provide more than one TC block, so you have the
+	  choice of which one to use for the clock framework.  The other
+	  TC can be used for other purposes, such as PWM generation and
+	  interval timing.
+
 config IBM_ASM
 	tristate "Device driver for IBM RSA service processor"
 	depends on X86 && PCI && INPUT && EXPERIMENTAL
@@ -107,6 +140,7 @@ config ACER_WMI
 	depends on EXPERIMENTAL
 	depends on ACPI
 	depends on LEDS_CLASS
+	depends on NEW_LEDS
 	depends on BACKLIGHT_CLASS_DEVICE
 	depends on SERIO_I8042
 	select ACPI_WMI
@@ -127,6 +161,7 @@ config ASUS_LAPTOP
         depends on ACPI
 	depends on EXPERIMENTAL && !ACPI_ASUS
 	depends on LEDS_CLASS
+	depends on NEW_LEDS
 	depends on BACKLIGHT_CLASS_DEVICE
         ---help---
 	  This is the new Linux driver for Asus laptops. It may also support some
@@ -208,10 +243,13 @@ config SONYPI_COMPAT
 config THINKPAD_ACPI
 	tristate "ThinkPad ACPI Laptop Extras"
 	depends on X86 && ACPI
+	select BACKLIGHT_LCD_SUPPORT
 	select BACKLIGHT_CLASS_DEVICE
 	select HWMON
 	select NVRAM
-	depends on INPUT
+	select INPUT
+	select NEW_LEDS
+	select LEDS_CLASS
 	---help---
 	  This is a driver for the IBM and Lenovo ThinkPad laptops. It adds
 	  support for Fn-Fx key combinations, Bluetooth control, video
@@ -311,6 +349,7 @@ config ATMEL_SSC
 config INTEL_MENLOW
 	tristate "Thermal Management driver for Intel menlow platform"
 	depends on ACPI_THERMAL
+	select THERMAL
 	depends on X86
 	---help---
 	  ACPI thermal management enhancement driver on
@@ -318,6 +357,19 @@ config INTEL_MENLOW
 
 	  If unsure, say N.
 
+config EEEPC_LAPTOP
+	tristate "Eee PC Hotkey Driver (EXPERIMENTAL)"
+	depends on X86
+	depends on ACPI
+	depends on BACKLIGHT_CLASS_DEVICE
+	depends on HWMON
+	depends on EXPERIMENTAL
+	---help---
+	  This driver supports the Fn-Fx keys on Eee PC laptops.
+	  It also adds the ability to switch camera/wlan on/off.
+
+	  If you have an Eee PC laptop, say Y or M here.
+
 config ENCLOSURE_SERVICES
 	tristate "Enclosure Services"
 	default n
@@ -327,4 +379,16 @@ config ENCLOSURE_SERVICES
 	  driver (SCSI/ATA) which supports enclosures
 	  or a SCSI enclosure device (SES) to use these services.
 
+config SGI_XP
+	tristate "Support communication between SGI SSIs"
+	depends on IA64_GENERIC || IA64_SGI_SN2
+	select IA64_UNCACHED_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
+	select GENERIC_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
+	---help---
+	  An SGI machine can be divided into multiple Single System
+	  Images which act independently of each other and have
+	  hardware based memory protection from the others.  Enabling
+	  this feature will allow for direct communication between SSIs
+	  based on a network adapter and DMA messaging.
+
 endif # MISC_DEVICES

drivers/misc/Makefile

@@ -7,9 +7,11 @@ obj-$(CONFIG_IBM_ASM)		+= ibmasm/
 obj-$(CONFIG_HDPU_FEATURES)	+= hdpuftrs/
 obj-$(CONFIG_MSI_LAPTOP)     += msi-laptop.o
 obj-$(CONFIG_ACER_WMI)     += acer-wmi.o
-obj-$(CONFIG_ASUS_LAPTOP)     += asus-laptop.o
+obj-$(CONFIG_ASUS_LAPTOP)	+= asus-laptop.o
+obj-$(CONFIG_EEEPC_LAPTOP)	+= eeepc-laptop.o
 obj-$(CONFIG_ATMEL_PWM)		+= atmel_pwm.o
 obj-$(CONFIG_ATMEL_SSC)		+= atmel-ssc.o
+obj-$(CONFIG_ATMEL_TCLIB)	+= atmel_tclib.o
 obj-$(CONFIG_TC1100_WMI)	+= tc1100-wmi.o
 obj-$(CONFIG_LKDTM)		+= lkdtm.o
 obj-$(CONFIG_TIFM_CORE)       	+= tifm_core.o
@@ -22,3 +24,5 @@ obj-$(CONFIG_FUJITSU_LAPTOP)	+= fujitsu-laptop.o
 obj-$(CONFIG_EEPROM_93CX6)	+= eeprom_93cx6.o
 obj-$(CONFIG_INTEL_MENLOW)	+= intel_menlow.o
 obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
+obj-$(CONFIG_KGDB_TESTS)	+= kgdbts.o
+obj-$(CONFIG_SGI_XP)		+= sgi-xp/

drivers/misc/atmel_tclib.c

@@ -0,0 +1,161 @@
+#include <linux/atmel_tc.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+
+/* Number of bytes to reserve for the iomem resource */
+#define ATMEL_TC_IOMEM_SIZE	256
+
+
+/*
+ * This is a thin library to solve the problem of how to portably allocate
+ * one of the TC blocks.  For simplicity, it doesn't currently expect to
+ * share individual timers between different drivers.
+ */
+
+#if defined(CONFIG_AVR32)
+/* AVR32 has these divide PBB */
+const u8 atmel_tc_divisors[5] = { 0, 4, 8, 16, 32, };
+EXPORT_SYMBOL(atmel_tc_divisors);
+
+#elif defined(CONFIG_ARCH_AT91)
+/* AT91 has these divide MCK */
+const u8 atmel_tc_divisors[5] = { 2, 8, 32, 128, 0, };
+EXPORT_SYMBOL(atmel_tc_divisors);
+
+#endif
+
+static DEFINE_SPINLOCK(tc_list_lock);
+static LIST_HEAD(tc_list);
+
+/**
+ * atmel_tc_alloc - allocate a specified TC block
+ * @block: which block to allocate
+ * @name: name to be associated with the iomem resource
+ *
+ * Caller allocates a block.  If it is available, a pointer to a
+ * pre-initialized struct atmel_tc is returned. The caller can access
+ * the registers directly through the "regs" field.
+ */
+struct atmel_tc *atmel_tc_alloc(unsigned block, const char *name)
+{
+	struct atmel_tc		*tc;
+	struct platform_device	*pdev = NULL;
+	struct resource		*r;
+
+	spin_lock(&tc_list_lock);
+	list_for_each_entry(tc, &tc_list, node) {
+		if (tc->pdev->id == block) {
+			pdev = tc->pdev;
+			break;
+		}
+	}
+
+	if (!pdev || tc->iomem)
+		goto fail;
+
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	r = request_mem_region(r->start, ATMEL_TC_IOMEM_SIZE, name);
+	if (!r)
+		goto fail;
+
+	tc->regs = ioremap(r->start, ATMEL_TC_IOMEM_SIZE);
+	if (!tc->regs)
+		goto fail_ioremap;
+
+	tc->iomem = r;
+
+out:
+	spin_unlock(&tc_list_lock);
+	return tc;
+
+fail_ioremap:
+	release_resource(r);
+fail:
+	tc = NULL;
+	goto out;
+}
+EXPORT_SYMBOL_GPL(atmel_tc_alloc);
+
+/**
+ * atmel_tc_free - release a specified TC block
+ * @tc: Timer/counter block that was returned by atmel_tc_alloc()
+ *
+ * This reverses the effect of atmel_tc_alloc(), unmapping the I/O
+ * registers, invalidating the resource returned by that routine and
+ * making the TC available to other drivers.
+ */
+void atmel_tc_free(struct atmel_tc *tc)
+{
+	spin_lock(&tc_list_lock);
+	if (tc->regs) {
+		iounmap(tc->regs);
+		release_resource(tc->iomem);
+		tc->regs = NULL;
+		tc->iomem = NULL;
+	}
+	spin_unlock(&tc_list_lock);
+}
+EXPORT_SYMBOL_GPL(atmel_tc_free);
+
+static int __init tc_probe(struct platform_device *pdev)
+{
+	struct atmel_tc *tc;
+	struct clk	*clk;
+	int		irq;
+
+	if (!platform_get_resource(pdev, IORESOURCE_MEM, 0))
+		return -EINVAL;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return -EINVAL;
+
+	tc = kzalloc(sizeof(struct atmel_tc), GFP_KERNEL);
+	if (!tc)
+		return -ENOMEM;
+
+	tc->pdev = pdev;
+
+	clk = clk_get(&pdev->dev, "t0_clk");
+	if (IS_ERR(clk)) {
+		kfree(tc);
+		return -EINVAL;
+	}
+
+	tc->clk[0] = clk;
+	tc->clk[1] = clk_get(&pdev->dev, "t1_clk");
+	if (IS_ERR(tc->clk[1]))
+		tc->clk[1] = clk;
+	tc->clk[2] = clk_get(&pdev->dev, "t2_clk");
+	if (IS_ERR(tc->clk[2]))
+		tc->clk[2] = clk;
+
+	tc->irq[0] = irq;
+	tc->irq[1] = platform_get_irq(pdev, 1);
+	if (tc->irq[1] < 0)
+		tc->irq[1] = irq;
+	tc->irq[2] = platform_get_irq(pdev, 2);
+	if (tc->irq[2] < 0)
+		tc->irq[2] = irq;
+
+	spin_lock(&tc_list_lock);
+	list_add_tail(&tc->node, &tc_list);
+	spin_unlock(&tc_list_lock);
+
+	return 0;
+}
+
+static struct platform_driver tc_driver = {
+	.driver.name	= "atmel_tcb",
+};
+
+static int __init tc_init(void)
+{
+	return platform_driver_probe(&tc_driver, tc_probe);
+}
+arch_initcall(tc_init);

drivers/misc/enclosure.c

@@ -31,7 +31,6 @@
 static LIST_HEAD(container_list);
 static DEFINE_MUTEX(container_list_lock);
 static struct class enclosure_class;
-static struct class enclosure_component_class;
 
 /**
  * enclosure_find - find an enclosure given a device
@@ -40,16 +39,16 @@ static struct class enclosure_component_class;
  * Looks through the list of registered enclosures to see
  * if it can find a match for a device.  Returns NULL if no
  * enclosure is found. Obtains a reference to the enclosure class
- * device which must be released with class_device_put().
+ * device which must be released with device_put().
  */
 struct enclosure_device *enclosure_find(struct device *dev)
 {
-	struct enclosure_device *edev = NULL;
+	struct enclosure_device *edev;
 
 	mutex_lock(&container_list_lock);
 	list_for_each_entry(edev, &container_list, node) {
-		if (edev->cdev.dev == dev) {
-			class_device_get(&edev->cdev);
+		if (edev->edev.parent == dev) {
+			get_device(&edev->edev);
 			mutex_unlock(&container_list_lock);
 			return edev;
 		}
@@ -117,11 +116,11 @@ enclosure_register(struct device *dev, const char *name, int components,
 
 	edev->components = components;
 
-	edev->cdev.class = &enclosure_class;
-	edev->cdev.dev = get_device(dev);
+	edev->edev.class = &enclosure_class;
+	edev->edev.parent = get_device(dev);
 	edev->cb = cb;
-	snprintf(edev->cdev.class_id, BUS_ID_SIZE, "%s", name);
-	err = class_device_register(&edev->cdev);
+	snprintf(edev->edev.bus_id, BUS_ID_SIZE, "%s", name);
+	err = device_register(&edev->edev);
 	if (err)
 		goto err;
 
@@ -135,7 +134,7 @@ enclosure_register(struct device *dev, const char *name, int components,
 	return edev;
 
  err:
-	put_device(edev->cdev.dev);
+	put_device(edev->edev.parent);
 	kfree(edev);
 	return ERR_PTR(err);
 }
@@ -158,29 +157,69 @@ void enclosure_unregister(struct enclosure_device *edev)
 
 	for (i = 0; i < edev->components; i++)
 		if (edev->component[i].number != -1)
-			class_device_unregister(&edev->component[i].cdev);
+			device_unregister(&edev->component[i].cdev);
 
 	/* prevent any callbacks into service user */
 	edev->cb = &enclosure_null_callbacks;
-	class_device_unregister(&edev->cdev);
+	device_unregister(&edev->edev);
 }
 EXPORT_SYMBOL_GPL(enclosure_unregister);
 
-static void enclosure_release(struct class_device *cdev)
+#define ENCLOSURE_NAME_SIZE	64
+
+static void enclosure_link_name(struct enclosure_component *cdev, char *name)
+{
+	strcpy(name, "enclosure_device:");
+	strcat(name, cdev->cdev.bus_id);
+}
+
+static void enclosure_remove_links(struct enclosure_component *cdev)
+{
+	char name[ENCLOSURE_NAME_SIZE];
+
+	enclosure_link_name(cdev, name);
+	sysfs_remove_link(&cdev->dev->kobj, name);
+	sysfs_remove_link(&cdev->cdev.kobj, "device");
+}
+
+static int enclosure_add_links(struct enclosure_component *cdev)
+{
+	int error;
+	char name[ENCLOSURE_NAME_SIZE];
+
+	error = sysfs_create_link(&cdev->cdev.kobj, &cdev->dev->kobj, "device");
+	if (error)
+		return error;
+
+	enclosure_link_name(cdev, name);
+	error = sysfs_create_link(&cdev->dev->kobj, &cdev->cdev.kobj, name);
+	if (error)
+		sysfs_remove_link(&cdev->cdev.kobj, "device");
+
+	return error;
+}
+
+static void enclosure_release(struct device *cdev)
 {
 	struct enclosure_device *edev = to_enclosure_device(cdev);
 
-	put_device(cdev->dev);
+	put_device(cdev->parent);
 	kfree(edev);
 }
 
-static void enclosure_component_release(struct class_device *cdev)
+static void enclosure_component_release(struct device *dev)
 {
-	if (cdev->dev)
+	struct enclosure_component *cdev = to_enclosure_component(dev);
+
+	if (cdev->dev) {
+		enclosure_remove_links(cdev);
 		put_device(cdev->dev);
-	class_device_put(cdev->parent);
+	}
+	put_device(dev->parent);
 }
 
+static struct attribute_group *enclosure_groups[];
+
 /**
  * enclosure_component_register - add a particular component to an enclosure
  * @edev:	the enclosure to add the component
@@ -201,7 +240,7 @@ enclosure_component_register(struct enclosure_device *edev,
 			     const char *name)
 {
 	struct enclosure_component *ecomp;
-	struct class_device *cdev;
+	struct device *cdev;
 	int err;
 
 	if (number >= edev->components)
@@ -215,14 +254,16 @@ enclosure_component_register(struct enclosure_device *edev,
 	ecomp->type = type;
 	ecomp->number = number;
 	cdev = &ecomp->cdev;
-	cdev->parent = class_device_get(&edev->cdev);
-	cdev->class = &enclosure_component_class;
+	cdev->parent = get_device(&edev->edev);
 	if (name)
-		snprintf(cdev->class_id, BUS_ID_SIZE, "%s", name);
+		snprintf(cdev->bus_id, BUS_ID_SIZE, "%s", name);
 	else
-		snprintf(cdev->class_id, BUS_ID_SIZE, "%u", number);
+		snprintf(cdev->bus_id, BUS_ID_SIZE, "%u", number);
 
-	err = class_device_register(cdev);
+	cdev->release = enclosure_component_release;
+	cdev->groups = enclosure_groups;
+
+	err = device_register(cdev);
 	if (err)
 		ERR_PTR(err);
 
@@ -247,18 +288,19 @@ EXPORT_SYMBOL_GPL(enclosure_component_register);
 int enclosure_add_device(struct enclosure_device *edev, int component,
 			 struct device *dev)
 {
-	struct class_device *cdev;
+	struct enclosure_component *cdev;
 
 	if (!edev || component >= edev->components)
 		return -EINVAL;
 
-	cdev = &edev->component[component].cdev;
+	cdev = &edev->component[component];
 
-	class_device_del(cdev);
 	if (cdev->dev)
-		put_device(cdev->dev);
+		enclosure_remove_links(cdev);
+
+	put_device(cdev->dev);
 	cdev->dev = get_device(dev);
-	return class_device_add(cdev);
+	return enclosure_add_links(cdev);
 }
 EXPORT_SYMBOL_GPL(enclosure_add_device);
 
@@ -272,18 +314,17 @@ EXPORT_SYMBOL_GPL(enclosure_add_device);
  */
 int enclosure_remove_device(struct enclosure_device *edev, int component)
 {
-	struct class_device *cdev;
+	struct enclosure_component *cdev;
 
 	if (!edev || component >= edev->components)
 		return -EINVAL;
 
-	cdev = &edev->component[component].cdev;
+	cdev = &edev->component[component];
 
-	class_device_del(cdev);
-	if (cdev->dev)
-		put_device(cdev->dev);
+	device_del(&cdev->cdev);
+	put_device(cdev->dev);
 	cdev->dev = NULL;
-	return class_device_add(cdev);
+	return device_add(&cdev->cdev);
 }
 EXPORT_SYMBOL_GPL(enclosure_remove_device);
 
@@ -291,14 +332,16 @@ EXPORT_SYMBOL_GPL(enclosure_remove_device);
  * sysfs pieces below
  */
 
-static ssize_t enclosure_show_components(struct class_device *cdev, char *buf)
+static ssize_t enclosure_show_components(struct device *cdev,
+					 struct device_attribute *attr,
+					 char *buf)
 {
 	struct enclosure_device *edev = to_enclosure_device(cdev);
 
 	return snprintf(buf, 40, "%d\n", edev->components);
 }
 
-static struct class_device_attribute enclosure_attrs[] = {
+static struct device_attribute enclosure_attrs[] = {
 	__ATTR(components, S_IRUGO, enclosure_show_components, NULL),
 	__ATTR_NULL
 };
@@ -306,8 +349,8 @@ static struct class_device_attribute enclosure_attrs[] = {
 static struct class enclosure_class = {
 	.name			= "enclosure",
 	.owner			= THIS_MODULE,
-	.release		= enclosure_release,
-	.class_dev_attrs	= enclosure_attrs,
+	.dev_release		= enclosure_release,
+	.dev_attrs		= enclosure_attrs,
 };
 
 static const char *const enclosure_status [] = {
@@ -326,7 +369,8 @@ static const char *const enclosure_type [] = {
 	[ENCLOSURE_COMPONENT_ARRAY_DEVICE] = "array device",
 };
 
-static ssize_t get_component_fault(struct class_device *cdev, char *buf)
+static ssize_t get_component_fault(struct device *cdev,
+				   struct device_attribute *attr, char *buf)
 {
 	struct enclosure_device *edev = to_enclosure_device(cdev->parent);
 	struct enclosure_component *ecomp = to_enclosure_component(cdev);
@@ -336,8 +380,9 @@ static ssize_t get_component_fault(struct class_device *cdev, char *buf)
 	return snprintf(buf, 40, "%d\n", ecomp->fault);
 }
 
-static ssize_t set_component_fault(struct class_device *cdev, const char *buf,
-				   size_t count)
+static ssize_t set_component_fault(struct device *cdev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t count)
 {
 	struct enclosure_device *edev = to_enclosure_device(cdev->parent);
 	struct enclosure_component *ecomp = to_enclosure_component(cdev);
@@ -348,7 +393,8 @@ static ssize_t set_component_fault(struct class_device *cdev, const char *buf,
 	return count;
 }
 
-static ssize_t get_component_status(struct class_device *cdev, char *buf)
+static ssize_t get_component_status(struct device *cdev,
+				    struct device_attribute *attr,char *buf)
 {
 	struct enclosure_device *edev = to_enclosure_device(cdev->parent);
 	struct enclosure_component *ecomp = to_enclosure_component(cdev);
@@ -358,8 +404,9 @@ static ssize_t get_component_status(struct class_device *cdev, char *buf)
 	return snprintf(buf, 40, "%s\n", enclosure_status[ecomp->status]);
 }
 
-static ssize_t set_component_status(struct class_device *cdev, const char *buf,
-				   size_t count)
+static ssize_t set_component_status(struct device *cdev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
 {
 	struct enclosure_device *edev = to_enclosure_device(cdev->parent);
 	struct enclosure_component *ecomp = to_enclosure_component(cdev);
@@ -380,7 +427,8 @@ static ssize_t set_component_status(struct class_device *cdev, const char *buf,
 		return -EINVAL;
 }
 
-static ssize_t get_component_active(struct class_device *cdev, char *buf)
+static ssize_t get_component_active(struct device *cdev,
+				    struct device_attribute *attr, char *buf)
 {
 	struct enclosure_device *edev = to_enclosure_device(cdev->parent);
 	struct enclosure_component *ecomp = to_enclosure_component(cdev);
@@ -390,8 +438,9 @@ static ssize_t get_component_active(struct class_device *cdev, char *buf)
 	return snprintf(buf, 40, "%d\n", ecomp->active);
 }
 
-static ssize_t set_component_active(struct class_device *cdev, const char *buf,
-				   size_t count)
+static ssize_t set_component_active(struct device *cdev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
 {
 	struct enclosure_device *edev = to_enclosure_device(cdev->parent);
 	struct enclosure_component *ecomp = to_enclosure_component(cdev);
@@ -402,7 +451,8 @@ static ssize_t set_component_active(struct class_device *cdev, const char *buf,
 	return count;
 }
 
-static ssize_t get_component_locate(struct class_device *cdev, char *buf)
+static ssize_t get_component_locate(struct device *cdev,
+				    struct device_attribute *attr, char *buf)
 {
 	struct enclosure_device *edev = to_enclosure_device(cdev->parent);
 	struct enclosure_component *ecomp = to_enclosure_component(cdev);
@@ -412,8 +462,9 @@ static ssize_t get_component_locate(struct class_device *cdev, char *buf)
 	return snprintf(buf, 40, "%d\n", ecomp->locate);
 }
 
-static ssize_t set_component_locate(struct class_device *cdev, const char *buf,
-				   size_t count)
+static ssize_t set_component_locate(struct device *cdev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
 {
 	struct enclosure_device *edev = to_enclosure_device(cdev->parent);
 	struct enclosure_component *ecomp = to_enclosure_component(cdev);
@@ -424,7 +475,8 @@ static ssize_t set_component_locate(struct class_device *cdev, const char *buf,
 	return count;
 }
 
-static ssize_t get_component_type(struct class_device *cdev, char *buf)
+static ssize_t get_component_type(struct device *cdev,
+				  struct device_attribute *attr, char *buf)
 {
 	struct enclosure_component *ecomp = to_enclosure_component(cdev);
 
@@ -432,24 +484,32 @@ static ssize_t get_component_type(struct class_device *cdev, char *buf)
 }
 
 
-static struct class_device_attribute enclosure_component_attrs[] = {
-	__ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault,
-	       set_component_fault),
-	__ATTR(status, S_IRUGO | S_IWUSR, get_component_status,
-	       set_component_status),
-	__ATTR(active, S_IRUGO | S_IWUSR, get_component_active,
-	       set_component_active),
-	__ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate,
-	       set_component_locate),
-	__ATTR(type, S_IRUGO, get_component_type, NULL),
-	__ATTR_NULL
+static DEVICE_ATTR(fault, S_IRUGO | S_IWUSR, get_component_fault,
+		    set_component_fault);
+static DEVICE_ATTR(status, S_IRUGO | S_IWUSR, get_component_status,
+		   set_component_status);
+static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, get_component_active,
+		   set_component_active);
+static DEVICE_ATTR(locate, S_IRUGO | S_IWUSR, get_component_locate,
+		   set_component_locate);
+static DEVICE_ATTR(type, S_IRUGO, get_component_type, NULL);
+
+static struct attribute *enclosure_component_attrs[] = {
+	&dev_attr_fault.attr,
+	&dev_attr_status.attr,
+	&dev_attr_active.attr,
+	&dev_attr_locate.attr,
+	&dev_attr_type.attr,
+	NULL
 };
 
-static struct class enclosure_component_class =  {
-	.name			= "enclosure_component",
-	.owner			= THIS_MODULE,
-	.class_dev_attrs	= enclosure_component_attrs,
-	.release		= enclosure_component_release,
+static struct attribute_group enclosure_group = {
+	.attrs = enclosure_component_attrs,
+};
+
+static struct attribute_group *enclosure_groups[] = {
+	&enclosure_group,
+	NULL
 };
 
 static int __init enclosure_init(void)
@@ -459,20 +519,12 @@ static int __init enclosure_init(void)
 	err = class_register(&enclosure_class);
 	if (err)
 		return err;
-	err = class_register(&enclosure_component_class);
-	if (err)
-		goto err_out;
 
 	return 0;
- err_out:
-	class_unregister(&enclosure_class);
-
-	return err;
 }
 
 static void __exit enclosure_exit(void)
 {
-	class_unregister(&enclosure_component_class);
 	class_unregister(&enclosure_class);
 }
 

drivers/misc/intel_menlow.c

@@ -175,28 +175,18 @@ static int intel_menlow_memory_add(struct acpi_device *device)
 		goto end;
 	}
 
-	if (cdev) {
-		acpi_driver_data(device) = cdev;
-		result = sysfs_create_link(&device->dev.kobj,
-					&cdev->device.kobj, "thermal_cooling");
-		if (result)
-			goto unregister;
-
-		result = sysfs_create_link(&cdev->device.kobj,
-					&device->dev.kobj, "device");
-		if (result) {
-			sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
-			goto unregister;
-		}
-	}
+	acpi_driver_data(device) = cdev;
+	result = sysfs_create_link(&device->dev.kobj,
+				&cdev->device.kobj, "thermal_cooling");
+	if (result)
+		printk(KERN_ERR PREFIX "Create sysfs link\n");
+	result = sysfs_create_link(&cdev->device.kobj,
+				&device->dev.kobj, "device");
+	if (result)
+		printk(KERN_ERR PREFIX "Create sysfs link\n");
 
  end:
 	return result;
-
- unregister:
-	thermal_cooling_device_unregister(cdev);
-	return result;
-
 }
 
 static int intel_menlow_memory_remove(struct acpi_device *device, int type)
@@ -213,7 +203,7 @@ static int intel_menlow_memory_remove(struct acpi_device *device, int type)
 	return 0;
 }
 
-const static struct acpi_device_id intel_menlow_memory_ids[] = {
+static const struct acpi_device_id intel_menlow_memory_ids[] = {
 	{"INT0002", 0},
 	{"", 0},
 };

drivers/misc/sgi-xp/Makefile

@@ -0,0 +1,11 @@
+#
+# Makefile for SGI's XP devices.
+#
+
+obj-$(CONFIG_SGI_XP)		+= xp.o
+xp-y				:= xp_main.o xp_nofault.o
+
+obj-$(CONFIG_SGI_XP)		+= xpc.o
+xpc-y				:= xpc_main.o xpc_channel.o xpc_partition.o
+
+obj-$(CONFIG_SGI_XP)		+= xpnet.o

drivers/misc/sgi-xp/xp.h

@@ -0,0 +1,463 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2004-2008 Silicon Graphics, Inc. All rights reserved.
+ */
+
+/*
+ * External Cross Partition (XP) structures and defines.
+ */
+
+#ifndef _DRIVERS_MISC_SGIXP_XP_H
+#define _DRIVERS_MISC_SGIXP_XP_H
+
+#include <linux/cache.h>
+#include <linux/hardirq.h>
+#include <linux/mutex.h>
+#include <asm/sn/types.h>
+#include <asm/sn/bte.h>
+
+#ifdef USE_DBUG_ON
+#define DBUG_ON(condition)	BUG_ON(condition)
+#else
+#define DBUG_ON(condition)
+#endif
+
+/*
+ * Define the maximum number of logically defined partitions the system
+ * can support. It is constrained by the maximum number of hardware
+ * partitionable regions. The term 'region' in this context refers to the
+ * minimum number of nodes that can comprise an access protection grouping.
+ * The access protection is in regards to memory, IPI and IOI.
+ *
+ * The maximum number of hardware partitionable regions is equal to the
+ * maximum number of nodes in the entire system divided by the minimum number
+ * of nodes that comprise an access protection grouping.
+ */
+#define XP_MAX_PARTITIONS	64
+
+/*
+ * Define the number of u64s required to represent all the C-brick nasids
+ * as a bitmap.  The cross-partition kernel modules deal only with
+ * C-brick nasids, thus the need for bitmaps which don't account for
+ * odd-numbered (non C-brick) nasids.
+ */
+#define XP_MAX_PHYSNODE_ID	(MAX_NUMALINK_NODES / 2)
+#define XP_NASID_MASK_BYTES	((XP_MAX_PHYSNODE_ID + 7) / 8)
+#define XP_NASID_MASK_WORDS	((XP_MAX_PHYSNODE_ID + 63) / 64)
+
+/*
+ * Wrapper for bte_copy() that should it return a failure status will retry
+ * the bte_copy() once in the hope that the failure was due to a temporary
+ * aberration (i.e., the link going down temporarily).
+ *
+ * 	src - physical address of the source of the transfer.
+ *	vdst - virtual address of the destination of the transfer.
+ *	len - number of bytes to transfer from source to destination.
+ *	mode - see bte_copy() for definition.
+ *	notification - see bte_copy() for definition.
+ *
+ * Note: xp_bte_copy() should never be called while holding a spinlock.
+ */
+static inline bte_result_t
+xp_bte_copy(u64 src, u64 vdst, u64 len, u64 mode, void *notification)
+{
+	bte_result_t ret;
+	u64 pdst = ia64_tpa(vdst);
+
+	/*
+	 * Ensure that the physically mapped memory is contiguous.
+	 *
+	 * We do this by ensuring that the memory is from region 7 only.
+	 * If the need should arise to use memory from one of the other
+	 * regions, then modify the BUG_ON() statement to ensure that the
+	 * memory from that region is always physically contiguous.
+	 */
+	BUG_ON(REGION_NUMBER(vdst) != RGN_KERNEL);
+
+	ret = bte_copy(src, pdst, len, mode, notification);
+	if ((ret != BTE_SUCCESS) && BTE_ERROR_RETRY(ret)) {
+		if (!in_interrupt())
+			cond_resched();
+
+		ret = bte_copy(src, pdst, len, mode, notification);
+	}
+
+	return ret;
+}
+
+/*
+ * XPC establishes channel connections between the local partition and any
+ * other partition that is currently up. Over these channels, kernel-level
+ * `users' can communicate with their counterparts on the other partitions.
+ *
+ * The maxinum number of channels is limited to eight. For performance reasons,
+ * the internal cross partition structures require sixteen bytes per channel,
+ * and eight allows all of this interface-shared info to fit in one cache line.
+ *
+ * XPC_NCHANNELS reflects the total number of channels currently defined.
+ * If the need for additional channels arises, one can simply increase
+ * XPC_NCHANNELS accordingly. If the day should come where that number
+ * exceeds the MAXIMUM number of channels allowed (eight), then one will need
+ * to make changes to the XPC code to allow for this.
+ */
+#define XPC_MEM_CHANNEL		0	/* memory channel number */
+#define	XPC_NET_CHANNEL		1	/* network channel number */
+
+#define	XPC_NCHANNELS		2	/* #of defined channels */
+#define XPC_MAX_NCHANNELS	8	/* max #of channels allowed */
+
+#if XPC_NCHANNELS > XPC_MAX_NCHANNELS
+#error	XPC_NCHANNELS exceeds MAXIMUM allowed.
+#endif
+
+/*
+ * The format of an XPC message is as follows:
+ *
+ *      +-------+--------------------------------+
+ *      | flags |////////////////////////////////|
+ *      +-------+--------------------------------+
+ *      |             message #                  |
+ *      +----------------------------------------+
+ *      |     payload (user-defined message)     |
+ *      |                                        |
+ *         		:
+ *      |                                        |
+ *      +----------------------------------------+
+ *
+ * The size of the payload is defined by the user via xpc_connect(). A user-
+ * defined message resides in the payload area.
+ *
+ * The user should have no dealings with the message header, but only the
+ * message's payload. When a message entry is allocated (via xpc_allocate())
+ * a pointer to the payload area is returned and not the actual beginning of
+ * the XPC message. The user then constructs a message in the payload area
+ * and passes that pointer as an argument on xpc_send() or xpc_send_notify().
+ *
+ * The size of a message entry (within a message queue) must be a cacheline
+ * sized multiple in order to facilitate the BTE transfer of messages from one
+ * message queue to another. A macro, XPC_MSG_SIZE(), is provided for the user
+ * that wants to fit as many msg entries as possible in a given memory size
+ * (e.g. a memory page).
+ */
+struct xpc_msg {
+	u8 flags;		/* FOR XPC INTERNAL USE ONLY */
+	u8 reserved[7];		/* FOR XPC INTERNAL USE ONLY */
+	s64 number;		/* FOR XPC INTERNAL USE ONLY */
+
+	u64 payload;		/* user defined portion of message */
+};
+
+#define XPC_MSG_PAYLOAD_OFFSET	(u64) (&((struct xpc_msg *)0)->payload)
+#define XPC_MSG_SIZE(_payload_size) \
+		L1_CACHE_ALIGN(XPC_MSG_PAYLOAD_OFFSET + (_payload_size))
+
+/*
+ * Define the return values and values passed to user's callout functions.
+ * (It is important to add new value codes at the end just preceding
+ * xpcUnknownReason, which must have the highest numerical value.)
+ */
+enum xpc_retval {
+	xpcSuccess = 0,
+
+	xpcNotConnected,	/*  1: channel is not connected */
+	xpcConnected,		/*  2: channel connected (opened) */
+	xpcRETIRED1,		/*  3: (formerly xpcDisconnected) */
+
+	xpcMsgReceived,		/*  4: message received */
+	xpcMsgDelivered,	/*  5: message delivered and acknowledged */
+
+	xpcRETIRED2,		/*  6: (formerly xpcTransferFailed) */
+
+	xpcNoWait,		/*  7: operation would require wait */
+	xpcRetry,		/*  8: retry operation */
+	xpcTimeout,		/*  9: timeout in xpc_allocate_msg_wait() */
+	xpcInterrupted,		/* 10: interrupted wait */
+
+	xpcUnequalMsgSizes,	/* 11: message size disparity between sides */
+	xpcInvalidAddress,	/* 12: invalid address */
+
+	xpcNoMemory,		/* 13: no memory available for XPC structures */
+	xpcLackOfResources,	/* 14: insufficient resources for operation */
+	xpcUnregistered,	/* 15: channel is not registered */
+	xpcAlreadyRegistered,	/* 16: channel is already registered */
+
+	xpcPartitionDown,	/* 17: remote partition is down */
+	xpcNotLoaded,		/* 18: XPC module is not loaded */
+	xpcUnloading,		/* 19: this side is unloading XPC module */
+
+	xpcBadMagic,		/* 20: XPC MAGIC string not found */
+
+	xpcReactivating,	/* 21: remote partition was reactivated */
+
+	xpcUnregistering,	/* 22: this side is unregistering channel */
+	xpcOtherUnregistering,	/* 23: other side is unregistering channel */
+
+	xpcCloneKThread,	/* 24: cloning kernel thread */
+	xpcCloneKThreadFailed,	/* 25: cloning kernel thread failed */
+
+	xpcNoHeartbeat,		/* 26: remote partition has no heartbeat */
+
+	xpcPioReadError,	/* 27: PIO read error */
+	xpcPhysAddrRegFailed,	/* 28: registration of phys addr range failed */
+
+	xpcBteDirectoryError,	/* 29: maps to BTEFAIL_DIR */
+	xpcBtePoisonError,	/* 30: maps to BTEFAIL_POISON */
+	xpcBteWriteError,	/* 31: maps to BTEFAIL_WERR */
+	xpcBteAccessError,	/* 32: maps to BTEFAIL_ACCESS */
+	xpcBtePWriteError,	/* 33: maps to BTEFAIL_PWERR */
+	xpcBtePReadError,	/* 34: maps to BTEFAIL_PRERR */
+	xpcBteTimeOutError,	/* 35: maps to BTEFAIL_TOUT */
+	xpcBteXtalkError,	/* 36: maps to BTEFAIL_XTERR */
+	xpcBteNotAvailable,	/* 37: maps to BTEFAIL_NOTAVAIL */
+	xpcBteUnmappedError,	/* 38: unmapped BTEFAIL_ error */
+
+	xpcBadVersion,		/* 39: bad version number */
+	xpcVarsNotSet,		/* 40: the XPC variables are not set up */
+	xpcNoRsvdPageAddr,	/* 41: unable to get rsvd page's phys addr */
+	xpcInvalidPartid,	/* 42: invalid partition ID */
+	xpcLocalPartid,		/* 43: local partition ID */
+
+	xpcOtherGoingDown,	/* 44: other side going down, reason unknown */
+	xpcSystemGoingDown,	/* 45: system is going down, reason unknown */
+	xpcSystemHalt,		/* 46: system is being halted */
+	xpcSystemReboot,	/* 47: system is being rebooted */
+	xpcSystemPoweroff,	/* 48: system is being powered off */
+
+	xpcDisconnecting,	/* 49: channel disconnecting (closing) */
+
+	xpcOpenCloseError,	/* 50: channel open/close protocol error */
+
+	xpcDisconnected,	/* 51: channel disconnected (closed) */
+
+	xpcBteSh2Start,		/* 52: BTE CRB timeout */
+
+				/* 53: 0x1 BTE Error Response Short */
+	xpcBteSh2RspShort = xpcBteSh2Start + BTEFAIL_SH2_RESP_SHORT,
+
+				/* 54: 0x2 BTE Error Response Long */
+	xpcBteSh2RspLong = xpcBteSh2Start + BTEFAIL_SH2_RESP_LONG,
+
+				/* 56: 0x4 BTE Error Response DSB */
+	xpcBteSh2RspDSB = xpcBteSh2Start + BTEFAIL_SH2_RESP_DSP,
+
+				/* 60: 0x8 BTE Error Response Access */
+	xpcBteSh2RspAccess = xpcBteSh2Start + BTEFAIL_SH2_RESP_ACCESS,
+
+				/* 68: 0x10 BTE Error CRB timeout */
+	xpcBteSh2CRBTO = xpcBteSh2Start + BTEFAIL_SH2_CRB_TO,
+
+				/* 84: 0x20 BTE Error NACK limit */
+	xpcBteSh2NACKLimit = xpcBteSh2Start + BTEFAIL_SH2_NACK_LIMIT,
+
+				/* 115: BTE end */
+	xpcBteSh2End = xpcBteSh2Start + BTEFAIL_SH2_ALL,
+
+	xpcUnknownReason	/* 116: unknown reason - must be last in enum */
+};
+
+/*
+ * Define the callout function types used by XPC to update the user on
+ * connection activity and state changes (via the user function registered by
+ * xpc_connect()) and to notify them of messages received and delivered (via
+ * the user function registered by xpc_send_notify()).
+ *
+ * The two function types are xpc_channel_func and xpc_notify_func and
+ * both share the following arguments, with the exception of "data", which
+ * only xpc_channel_func has.
+ *
+ * Arguments:
+ *
+ *	reason - reason code. (See following table.)
+ *	partid - partition ID associated with condition.
+ *	ch_number - channel # associated with condition.
+ *	data - pointer to optional data. (See following table.)
+ *	key - pointer to optional user-defined value provided as the "key"
+ *	      argument to xpc_connect() or xpc_send_notify().
+ *
+ * In the following table the "Optional Data" column applies to callouts made
+ * to functions registered by xpc_connect(). A "NA" in that column indicates
+ * that this reason code can be passed to functions registered by
+ * xpc_send_notify() (i.e. they don't have data arguments).
+ *
+ * Also, the first three reason codes in the following table indicate
+ * success, whereas the others indicate failure. When a failure reason code
+ * is received, one can assume that the channel is not connected.
+ *
+ *
+ * Reason Code          | Cause                          | Optional Data
+ * =====================+================================+=====================
+ * xpcConnected         | connection has been established| max #of entries
+ *                      | to the specified partition on  | allowed in message
+ *                      | the specified channel          | queue
+ * ---------------------+--------------------------------+---------------------
+ * xpcMsgReceived       | an XPC message arrived from    | address of payload
+ *                      | the specified partition on the |
+ *                      | specified channel              | [the user must call
+ *                      |                                | xpc_received() when
+ *                      |                                | finished with the
+ *                      |                                | payload]
+ * ---------------------+--------------------------------+---------------------
+ * xpcMsgDelivered      | notification that the message  | NA
+ *                      | was delivered to the intended  |
+ *                      | recipient and that they have   |
+ *                      | acknowledged its receipt by    |
+ *                      | calling xpc_received()         |
+ * =====================+================================+=====================
+ * xpcUnequalMsgSizes   | can't connect to the specified | NULL
+ *                      | partition on the specified     |
+ *                      | channel because of mismatched  |
+ *                      | message sizes                  |
+ * ---------------------+--------------------------------+---------------------
+ * xpcNoMemory          | insufficient memory avaiable   | NULL
+ *                      | to allocate message queue      |
+ * ---------------------+--------------------------------+---------------------
+ * xpcLackOfResources   | lack of resources to create    | NULL
+ *                      | the necessary kthreads to      |
+ *                      | support the channel            |
+ * ---------------------+--------------------------------+---------------------
+ * xpcUnregistering     | this side's user has           | NULL or NA
+ *                      | unregistered by calling        |
+ *                      | xpc_disconnect()               |
+ * ---------------------+--------------------------------+---------------------
+ * xpcOtherUnregistering| the other side's user has      | NULL or NA
+ *                      | unregistered by calling        |
+ *                      | xpc_disconnect()               |
+ * ---------------------+--------------------------------+---------------------
+ * xpcNoHeartbeat       | the other side's XPC is no     | NULL or NA
+ *                      | longer heartbeating            |
+ *                      |                                |
+ * ---------------------+--------------------------------+---------------------
+ * xpcUnloading         | this side's XPC module is      | NULL or NA
+ *                      | being unloaded                 |
+ *                      |                                |
+ * ---------------------+--------------------------------+---------------------
+ * xpcOtherUnloading    | the other side's XPC module is | NULL or NA
+ *                      | is being unloaded              |
+ *                      |                                |
+ * ---------------------+--------------------------------+---------------------
+ * xpcPioReadError      | xp_nofault_PIOR() returned an  | NULL or NA
+ *                      | error while sending an IPI     |
+ *                      |                                |
+ * ---------------------+--------------------------------+---------------------
+ * xpcInvalidAddress    | the address either received or | NULL or NA
+ *                      | sent by the specified partition|
+ *                      | is invalid                     |
+ * ---------------------+--------------------------------+---------------------
+ * xpcBteNotAvailable   | attempt to pull data from the  | NULL or NA
+ * xpcBtePoisonError    | specified partition over the   |
+ * xpcBteWriteError     | specified channel via a        |
+ * xpcBteAccessError    | bte_copy() failed              |
+ * xpcBteTimeOutError   |                                |
+ * xpcBteXtalkError     |                                |
+ * xpcBteDirectoryError |                                |
+ * xpcBteGenericError   |                                |
+ * xpcBteUnmappedError  |                                |
+ * ---------------------+--------------------------------+---------------------
+ * xpcUnknownReason     | the specified channel to the   | NULL or NA
+ *                      | specified partition was        |
+ *                      | unavailable for unknown reasons|
+ * =====================+================================+=====================
+ */
+
+typedef void (*xpc_channel_func) (enum xpc_retval reason, partid_t partid,
+				  int ch_number, void *data, void *key);
+
+typedef void (*xpc_notify_func) (enum xpc_retval reason, partid_t partid,
+				 int ch_number, void *key);
+
+/*
+ * The following is a registration entry. There is a global array of these,
+ * one per channel. It is used to record the connection registration made
+ * by the users of XPC. As long as a registration entry exists, for any
+ * partition that comes up, XPC will attempt to establish a connection on
+ * that channel. Notification that a connection has been made will occur via
+ * the xpc_channel_func function.
+ *
+ * The 'func' field points to the function to call when aynchronous
+ * notification is required for such events as: a connection established/lost,
+ * or an incoming message received, or an error condition encountered. A
+ * non-NULL 'func' field indicates that there is an active registration for
+ * the channel.
+ */
+struct xpc_registration {
+	struct mutex mutex;
+	xpc_channel_func func;	/* function to call */
+	void *key;		/* pointer to user's key */
+	u16 nentries;		/* #of msg entries in local msg queue */
+	u16 msg_size;		/* message queue's message size */
+	u32 assigned_limit;	/* limit on #of assigned kthreads */
+	u32 idle_limit;		/* limit on #of idle kthreads */
+} ____cacheline_aligned;
+
+#define XPC_CHANNEL_REGISTERED(_c)	(xpc_registrations[_c].func != NULL)
+
+/* the following are valid xpc_allocate() flags */
+#define XPC_WAIT	0	/* wait flag */
+#define XPC_NOWAIT	1	/* no wait flag */
+
+struct xpc_interface {
+	void (*connect) (int);
+	void (*disconnect) (int);
+	enum xpc_retval (*allocate) (partid_t, int, u32, void **);
+	enum xpc_retval (*send) (partid_t, int, void *);
+	enum xpc_retval (*send_notify) (partid_t, int, void *,
+					xpc_notify_func, void *);
+	void (*received) (partid_t, int, void *);
+	enum xpc_retval (*partid_to_nasids) (partid_t, void *);
+};
+
+extern struct xpc_interface xpc_interface;
+
+extern void xpc_set_interface(void (*)(int),
+			      void (*)(int),
+			      enum xpc_retval (*)(partid_t, int, u32, void **),
+			      enum xpc_retval (*)(partid_t, int, void *),
+			      enum xpc_retval (*)(partid_t, int, void *,
+						  xpc_notify_func, void *),
+			      void (*)(partid_t, int, void *),
+			      enum xpc_retval (*)(partid_t, void *));
+extern void xpc_clear_interface(void);
+
+extern enum xpc_retval xpc_connect(int, xpc_channel_func, void *, u16,
+				   u16, u32, u32);
+extern void xpc_disconnect(int);
+
+static inline enum xpc_retval
+xpc_allocate(partid_t partid, int ch_number, u32 flags, void **payload)
+{
+	return xpc_interface.allocate(partid, ch_number, flags, payload);
+}
+
+static inline enum xpc_retval
+xpc_send(partid_t partid, int ch_number, void *payload)
+{
+	return xpc_interface.send(partid, ch_number, payload);
+}
+
+static inline enum xpc_retval
+xpc_send_notify(partid_t partid, int ch_number, void *payload,
+		xpc_notify_func func, void *key)
+{
+	return xpc_interface.send_notify(partid, ch_number, payload, func, key);
+}
+
+static inline void
+xpc_received(partid_t partid, int ch_number, void *payload)
+{
+	return xpc_interface.received(partid, ch_number, payload);
+}
+
+static inline enum xpc_retval
+xpc_partid_to_nasids(partid_t partid, void *nasids)
+{
+	return xpc_interface.partid_to_nasids(partid, nasids);
+}
+
+extern u64 xp_nofault_PIOR_target;
+extern int xp_nofault_PIOR(void *);
+extern int xp_error_PIOR(void);
+
+#endif /* _DRIVERS_MISC_SGIXP_XP_H */

drivers/misc/sgi-xp/xp_main.c

@@ -0,0 +1,279 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+/*
+ * Cross Partition (XP) base.
+ *
+ *	XP provides a base from which its users can interact
+ *	with XPC, yet not be dependent on XPC.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <asm/sn/intr.h>
+#include <asm/sn/sn_sal.h>
+#include "xp.h"
+
+/*
+ * The export of xp_nofault_PIOR needs to happen here since it is defined
+ * in drivers/misc/sgi-xp/xp_nofault.S. The target of the nofault read is
+ * defined here.
+ */
+EXPORT_SYMBOL_GPL(xp_nofault_PIOR);
+
+u64 xp_nofault_PIOR_target;
+EXPORT_SYMBOL_GPL(xp_nofault_PIOR_target);
+
+/*
+ * xpc_registrations[] keeps track of xpc_connect()'s done by the kernel-level
+ * users of XPC.
+ */
+struct xpc_registration xpc_registrations[XPC_NCHANNELS];
+EXPORT_SYMBOL_GPL(xpc_registrations);
+
+/*
+ * Initialize the XPC interface to indicate that XPC isn't loaded.
+ */
+static enum xpc_retval
+xpc_notloaded(void)
+{
+	return xpcNotLoaded;
+}
+
+struct xpc_interface xpc_interface = {
+	(void (*)(int))xpc_notloaded,
+	(void (*)(int))xpc_notloaded,
+	(enum xpc_retval(*)(partid_t, int, u32, void **))xpc_notloaded,
+	(enum xpc_retval(*)(partid_t, int, void *))xpc_notloaded,
+	(enum xpc_retval(*)(partid_t, int, void *, xpc_notify_func, void *))
+	    xpc_notloaded,
+	(void (*)(partid_t, int, void *))xpc_notloaded,
+	(enum xpc_retval(*)(partid_t, void *))xpc_notloaded
+};
+EXPORT_SYMBOL_GPL(xpc_interface);
+
+/*
+ * XPC calls this when it (the XPC module) has been loaded.
+ */
+void
+xpc_set_interface(void (*connect) (int),
+		  void (*disconnect) (int),
+		  enum xpc_retval (*allocate) (partid_t, int, u32, void **),
+		  enum xpc_retval (*send) (partid_t, int, void *),
+		  enum xpc_retval (*send_notify) (partid_t, int, void *,
+						  xpc_notify_func, void *),
+		  void (*received) (partid_t, int, void *),
+		  enum xpc_retval (*partid_to_nasids) (partid_t, void *))
+{
+	xpc_interface.connect = connect;
+	xpc_interface.disconnect = disconnect;
+	xpc_interface.allocate = allocate;
+	xpc_interface.send = send;
+	xpc_interface.send_notify = send_notify;
+	xpc_interface.received = received;
+	xpc_interface.partid_to_nasids = partid_to_nasids;
+}
+EXPORT_SYMBOL_GPL(xpc_set_interface);
+
+/*
+ * XPC calls this when it (the XPC module) is being unloaded.
+ */
+void
+xpc_clear_interface(void)
+{
+	xpc_interface.connect = (void (*)(int))xpc_notloaded;
+	xpc_interface.disconnect = (void (*)(int))xpc_notloaded;
+	xpc_interface.allocate = (enum xpc_retval(*)(partid_t, int, u32,
+						     void **))xpc_notloaded;
+	xpc_interface.send = (enum xpc_retval(*)(partid_t, int, void *))
+	    xpc_notloaded;
+	xpc_interface.send_notify = (enum xpc_retval(*)(partid_t, int, void *,
+							xpc_notify_func,
+							void *))xpc_notloaded;
+	xpc_interface.received = (void (*)(partid_t, int, void *))
+	    xpc_notloaded;
+	xpc_interface.partid_to_nasids = (enum xpc_retval(*)(partid_t, void *))
+	    xpc_notloaded;
+}
+EXPORT_SYMBOL_GPL(xpc_clear_interface);
+
+/*
+ * Register for automatic establishment of a channel connection whenever
+ * a partition comes up.
+ *
+ * Arguments:
+ *
+ *	ch_number - channel # to register for connection.
+ *	func - function to call for asynchronous notification of channel
+ *	       state changes (i.e., connection, disconnection, error) and
+ *	       the arrival of incoming messages.
+ *      key - pointer to optional user-defined value that gets passed back
+ *	      to the user on any callouts made to func.
+ *	payload_size - size in bytes of the XPC message's payload area which
+ *		       contains a user-defined message. The user should make
+ *		       this large enough to hold their largest message.
+ *	nentries - max #of XPC message entries a message queue can contain.
+ *		   The actual number, which is determined when a connection
+ * 		   is established and may be less then requested, will be
+ *		   passed to the user via the xpcConnected callout.
+ *	assigned_limit - max number of kthreads allowed to be processing
+ * 			 messages (per connection) at any given instant.
+ *	idle_limit - max number of kthreads allowed to be idle at any given
+ * 		     instant.
+ */
+enum xpc_retval
+xpc_connect(int ch_number, xpc_channel_func func, void *key, u16 payload_size,
+	    u16 nentries, u32 assigned_limit, u32 idle_limit)
+{
+	struct xpc_registration *registration;
+
+	DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
+	DBUG_ON(payload_size == 0 || nentries == 0);
+	DBUG_ON(func == NULL);
+	DBUG_ON(assigned_limit == 0 || idle_limit > assigned_limit);
+
+	registration = &xpc_registrations[ch_number];
+
+	if (mutex_lock_interruptible(&registration->mutex) != 0)
+		return xpcInterrupted;
+
+	/* if XPC_CHANNEL_REGISTERED(ch_number) */
+	if (registration->func != NULL) {
+		mutex_unlock(&registration->mutex);
+		return xpcAlreadyRegistered;
+	}
+
+	/* register the channel for connection */
+	registration->msg_size = XPC_MSG_SIZE(payload_size);
+	registration->nentries = nentries;
+	registration->assigned_limit = assigned_limit;
+	registration->idle_limit = idle_limit;
+	registration->key = key;
+	registration->func = func;
+
+	mutex_unlock(&registration->mutex);
+
+	xpc_interface.connect(ch_number);
+
+	return xpcSuccess;
+}
+EXPORT_SYMBOL_GPL(xpc_connect);
+
+/*
+ * Remove the registration for automatic connection of the specified channel
+ * when a partition comes up.
+ *
+ * Before returning this xpc_disconnect() will wait for all connections on the
+ * specified channel have been closed/torndown. So the caller can be assured
+ * that they will not be receiving any more callouts from XPC to their
+ * function registered via xpc_connect().
+ *
+ * Arguments:
+ *
+ *	ch_number - channel # to unregister.
+ */
+void
+xpc_disconnect(int ch_number)
+{
+	struct xpc_registration *registration;
+
+	DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
+
+	registration = &xpc_registrations[ch_number];
+
+	/*
+	 * We've decided not to make this a down_interruptible(), since we
+	 * figured XPC's users will just turn around and call xpc_disconnect()
+	 * again anyways, so we might as well wait, if need be.
+	 */
+	mutex_lock(&registration->mutex);
+
+	/* if !XPC_CHANNEL_REGISTERED(ch_number) */
+	if (registration->func == NULL) {
+		mutex_unlock(&registration->mutex);
+		return;
+	}
+
+	/* remove the connection registration for the specified channel */
+	registration->func = NULL;
+	registration->key = NULL;
+	registration->nentries = 0;
+	registration->msg_size = 0;
+	registration->assigned_limit = 0;
+	registration->idle_limit = 0;
+
+	xpc_interface.disconnect(ch_number);
+
+	mutex_unlock(&registration->mutex);
+
+	return;
+}
+EXPORT_SYMBOL_GPL(xpc_disconnect);
+
+int __init
+xp_init(void)
+{
+	int ret, ch_number;
+	u64 func_addr = *(u64 *)xp_nofault_PIOR;
+	u64 err_func_addr = *(u64 *)xp_error_PIOR;
+
+	if (!ia64_platform_is("sn2"))
+		return -ENODEV;
+
+	/*
+	 * Register a nofault code region which performs a cross-partition
+	 * PIO read. If the PIO read times out, the MCA handler will consume
+	 * the error and return to a kernel-provided instruction to indicate
+	 * an error. This PIO read exists because it is guaranteed to timeout
+	 * if the destination is down (AMO operations do not timeout on at
+	 * least some CPUs on Shubs <= v1.2, which unfortunately we have to
+	 * work around).
+	 */
+	ret = sn_register_nofault_code(func_addr, err_func_addr, err_func_addr,
+				       1, 1);
+	if (ret != 0) {
+		printk(KERN_ERR "XP: can't register nofault code, error=%d\n",
+		       ret);
+	}
+	/*
+	 * Setup the nofault PIO read target. (There is no special reason why
+	 * SH_IPI_ACCESS was selected.)
+	 */
+	if (is_shub2())
+		xp_nofault_PIOR_target = SH2_IPI_ACCESS0;
+	else
+		xp_nofault_PIOR_target = SH1_IPI_ACCESS;
+
+	/* initialize the connection registration mutex */
+	for (ch_number = 0; ch_number < XPC_NCHANNELS; ch_number++)
+		mutex_init(&xpc_registrations[ch_number].mutex);
+
+	return 0;
+}
+
+module_init(xp_init);
+
+void __exit
+xp_exit(void)
+{
+	u64 func_addr = *(u64 *)xp_nofault_PIOR;
+	u64 err_func_addr = *(u64 *)xp_error_PIOR;
+
+	/* unregister the PIO read nofault code region */
+	(void)sn_register_nofault_code(func_addr, err_func_addr,
+				       err_func_addr, 1, 0);
+}
+
+module_exit(xp_exit);
+
+MODULE_AUTHOR("Silicon Graphics, Inc.");
+MODULE_DESCRIPTION("Cross Partition (XP) base");
+MODULE_LICENSE("GPL");

drivers/misc/sgi-xp/xp_nofault.S

@@ -0,0 +1,35 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+/*
+ * The xp_nofault_PIOR function takes a pointer to a remote PIO register
+ * and attempts to load and consume a value from it.  This function
+ * will be registered as a nofault code block.  In the event that the
+ * PIO read fails, the MCA handler will force the error to look
+ * corrected and vector to the xp_error_PIOR which will return an error.
+ *
+ * The definition of "consumption" and the time it takes for an MCA
+ * to surface is processor implementation specific.  This code
+ * is sufficient on Itanium through the Montvale processor family.
+ * It may need to be adjusted for future processor implementations.
+ *
+ *	extern int xp_nofault_PIOR(void *remote_register);
+ */
+
+	.global xp_nofault_PIOR
+xp_nofault_PIOR:
+	mov	r8=r0			// Stage a success return value
+	ld8.acq	r9=[r32];;		// PIO Read the specified register
+	adds	r9=1,r9;;		// Add to force consumption
+	srlz.i;;			// Allow time for MCA to surface
+	br.ret.sptk.many b0;;		// Return success
+
+	.global xp_error_PIOR
+xp_error_PIOR:
+	mov	r8=1			// Return value of 1
+	br.ret.sptk.many b0;;		// Return failure