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-rw-r--r--drivers/base/Makefile1
-rw-r--r--drivers/base/attribute_container.c2
-rw-r--r--drivers/base/base.h12
-rw-r--r--drivers/base/class.c151
-rw-r--r--drivers/base/core.c21
-rw-r--r--drivers/base/cpu.c17
-rw-r--r--drivers/base/driver.c3
-rw-r--r--drivers/base/firmware.c3
-rw-r--r--drivers/base/firmware_class.c69
-rw-r--r--drivers/base/init.c12
-rw-r--r--drivers/base/memory.c452
-rw-r--r--drivers/base/platform.c25
-rw-r--r--drivers/base/power/main.c26
-rw-r--r--drivers/base/power/power.h13
-rw-r--r--drivers/base/power/runtime.c1
-rw-r--r--drivers/base/power/sysfs.c73
-rw-r--r--drivers/base/sys.c1
17 files changed, 740 insertions, 142 deletions
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 66d9c4643fc1..f12898d53078 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -7,6 +7,7 @@ obj-y := core.o sys.o bus.o dd.o \
obj-y += power/
obj-$(CONFIG_FW_LOADER) += firmware_class.o
obj-$(CONFIG_NUMA) += node.o
+obj-$(CONFIG_MEMORY_HOTPLUG) += memory.o
ifeq ($(CONFIG_DEBUG_DRIVER),y)
EXTRA_CFLAGS += -DDEBUG
diff --git a/drivers/base/attribute_container.c b/drivers/base/attribute_container.c
index 6b2eb6f39b4d..2a7d7ae83e1e 100644
--- a/drivers/base/attribute_container.c
+++ b/drivers/base/attribute_container.c
@@ -19,6 +19,8 @@
#include <linux/list.h>
#include <linux/module.h>
+#include "base.h"
+
/* This is a private structure used to tie the classdev and the
* container .. it should never be visible outside this file */
struct internal_container {
diff --git a/drivers/base/base.h b/drivers/base/base.h
index 783752b68a9a..e3b548d46cff 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -1,3 +1,15 @@
+
+/* initialisation functions */
+
+extern int devices_init(void);
+extern int buses_init(void);
+extern int classes_init(void);
+extern int firmware_init(void);
+extern int platform_bus_init(void);
+extern int system_bus_init(void);
+extern int cpu_dev_init(void);
+extern int attribute_container_init(void);
+
extern int bus_add_device(struct device * dev);
extern void bus_remove_device(struct device * dev);
diff --git a/drivers/base/class.c b/drivers/base/class.c
index ce23dc8c18c5..db65fd0babe9 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -17,6 +17,7 @@
#include <linux/string.h>
#include <linux/kdev_t.h>
#include <linux/err.h>
+#include <linux/slab.h>
#include "base.h"
#define to_class_attr(_attr) container_of(_attr, struct class_attribute, attr)
@@ -99,7 +100,8 @@ struct class * class_get(struct class * cls)
void class_put(struct class * cls)
{
- subsys_put(&cls->subsys);
+ if (cls)
+ subsys_put(&cls->subsys);
}
@@ -165,14 +167,25 @@ void class_unregister(struct class * cls)
static void class_create_release(struct class *cls)
{
+ pr_debug("%s called for %s\n", __FUNCTION__, cls->name);
kfree(cls);
}
static void class_device_create_release(struct class_device *class_dev)
{
+ pr_debug("%s called for %s\n", __FUNCTION__, class_dev->class_id);
kfree(class_dev);
}
+/* needed to allow these devices to have parent class devices */
+static int class_device_create_hotplug(struct class_device *class_dev,
+ char **envp, int num_envp,
+ char *buffer, int buffer_size)
+{
+ pr_debug("%s called for %s\n", __FUNCTION__, class_dev->class_id);
+ return 0;
+}
+
/**
* class_create - create a struct class structure
* @owner: pointer to the module that is to "own" this struct class
@@ -301,10 +314,12 @@ static void class_dev_release(struct kobject * kobj)
kfree(cd->devt_attr);
cd->devt_attr = NULL;
- if (cls->release)
+ if (cd->release)
+ cd->release(cd);
+ else if (cls->release)
cls->release(cd);
else {
- printk(KERN_ERR "Device class '%s' does not have a release() function, "
+ printk(KERN_ERR "Class Device '%s' does not have a release() function, "
"it is broken and must be fixed.\n",
cd->class_id);
WARN_ON(1);
@@ -382,14 +397,18 @@ static int class_hotplug(struct kset *kset, struct kobject *kobj, char **envp,
buffer = &buffer[length];
buffer_size -= length;
- if (class_dev->class->hotplug) {
- /* have the bus specific function add its stuff */
- retval = class_dev->class->hotplug (class_dev, envp, num_envp,
- buffer, buffer_size);
- if (retval) {
- pr_debug ("%s - hotplug() returned %d\n",
- __FUNCTION__, retval);
- }
+ if (class_dev->hotplug) {
+ /* have the class device specific function add its stuff */
+ retval = class_dev->hotplug(class_dev, envp, num_envp,
+ buffer, buffer_size);
+ if (retval)
+ pr_debug("class_dev->hotplug() returned %d\n", retval);
+ } else if (class_dev->class->hotplug) {
+ /* have the class specific function add its stuff */
+ retval = class_dev->class->hotplug(class_dev, envp, num_envp,
+ buffer, buffer_size);
+ if (retval)
+ pr_debug("class->hotplug() returned %d\n", retval);
}
return retval;
@@ -442,6 +461,13 @@ static ssize_t show_dev(struct class_device *class_dev, char *buf)
return print_dev_t(buf, class_dev->devt);
}
+static ssize_t store_uevent(struct class_device *class_dev,
+ const char *buf, size_t count)
+{
+ kobject_hotplug(&class_dev->kobj, KOBJ_ADD);
+ return count;
+}
+
void class_device_initialize(struct class_device *class_dev)
{
kobj_set_kset_s(class_dev, class_obj_subsys);
@@ -469,34 +495,45 @@ static char *make_class_name(struct class_device *class_dev)
int class_device_add(struct class_device *class_dev)
{
- struct class * parent = NULL;
- struct class_interface * class_intf;
+ struct class *parent_class = NULL;
+ struct class_device *parent_class_dev = NULL;
+ struct class_interface *class_intf;
char *class_name = NULL;
- int error;
+ int error = -EINVAL;
class_dev = class_device_get(class_dev);
if (!class_dev)
return -EINVAL;
- if (!strlen(class_dev->class_id)) {
- error = -EINVAL;
+ if (!strlen(class_dev->class_id))
goto register_done;
- }
- parent = class_get(class_dev->class);
+ parent_class = class_get(class_dev->class);
+ if (!parent_class)
+ goto register_done;
+ parent_class_dev = class_device_get(class_dev->parent);
pr_debug("CLASS: registering class device: ID = '%s'\n",
class_dev->class_id);
/* first, register with generic layer. */
kobject_set_name(&class_dev->kobj, "%s", class_dev->class_id);
- if (parent)
- class_dev->kobj.parent = &parent->subsys.kset.kobj;
+ if (parent_class_dev)
+ class_dev->kobj.parent = &parent_class_dev->kobj;
+ else
+ class_dev->kobj.parent = &parent_class->subsys.kset.kobj;
- if ((error = kobject_add(&class_dev->kobj)))
+ error = kobject_add(&class_dev->kobj);
+ if (error)
goto register_done;
/* add the needed attributes to this device */
+ class_dev->uevent_attr.attr.name = "uevent";
+ class_dev->uevent_attr.attr.mode = S_IWUSR;
+ class_dev->uevent_attr.attr.owner = parent_class->owner;
+ class_dev->uevent_attr.store = store_uevent;
+ class_device_create_file(class_dev, &class_dev->uevent_attr);
+
if (MAJOR(class_dev->devt)) {
struct class_device_attribute *attr;
attr = kzalloc(sizeof(*attr), GFP_KERNEL);
@@ -505,12 +542,10 @@ int class_device_add(struct class_device *class_dev)
kobject_del(&class_dev->kobj);
goto register_done;
}
-
attr->attr.name = "dev";
attr->attr.mode = S_IRUGO;
- attr->attr.owner = parent->owner;
+ attr->attr.owner = parent_class->owner;
attr->show = show_dev;
- attr->store = NULL;
class_device_create_file(class_dev, attr);
class_dev->devt_attr = attr;
}
@@ -524,20 +559,23 @@ int class_device_add(struct class_device *class_dev)
class_name);
}
+ kobject_hotplug(&class_dev->kobj, KOBJ_ADD);
+
/* notify any interfaces this device is now here */
- if (parent) {
- down(&parent->sem);
- list_add_tail(&class_dev->node, &parent->children);
- list_for_each_entry(class_intf, &parent->interfaces, node)
+ if (parent_class) {
+ down(&parent_class->sem);
+ list_add_tail(&class_dev->node, &parent_class->children);
+ list_for_each_entry(class_intf, &parent_class->interfaces, node)
if (class_intf->add)
- class_intf->add(class_dev);
- up(&parent->sem);
+ class_intf->add(class_dev, class_intf);
+ up(&parent_class->sem);
}
- kobject_hotplug(&class_dev->kobj, KOBJ_ADD);
register_done:
- if (error && parent)
- class_put(parent);
+ if (error) {
+ class_put(parent_class);
+ class_device_put(parent_class_dev);
+ }
class_device_put(class_dev);
kfree(class_name);
return error;
@@ -552,21 +590,28 @@ int class_device_register(struct class_device *class_dev)
/**
* class_device_create - creates a class device and registers it with sysfs
* @cs: pointer to the struct class that this device should be registered to.
+ * @parent: pointer to the parent struct class_device of this new device, if any.
* @dev: the dev_t for the char device to be added.
* @device: a pointer to a struct device that is assiociated with this class device.
* @fmt: string for the class device's name
*
* This function can be used by char device classes. A struct
* class_device will be created in sysfs, registered to the specified
- * class. A "dev" file will be created, showing the dev_t for the
- * device. The pointer to the struct class_device will be returned from
- * the call. Any further sysfs files that might be required can be
- * created using this pointer.
+ * class.
+ * A "dev" file will be created, showing the dev_t for the device, if
+ * the dev_t is not 0,0.
+ * If a pointer to a parent struct class_device is passed in, the newly
+ * created struct class_device will be a child of that device in sysfs.
+ * The pointer to the struct class_device will be returned from the
+ * call. Any further sysfs files that might be required can be created
+ * using this pointer.
*
* Note: the struct class passed to this function must have previously
* been created with a call to class_create().
*/
-struct class_device *class_device_create(struct class *cls, dev_t devt,
+struct class_device *class_device_create(struct class *cls,
+ struct class_device *parent,
+ dev_t devt,
struct device *device, char *fmt, ...)
{
va_list args;
@@ -585,6 +630,9 @@ struct class_device *class_device_create(struct class *cls, dev_t devt,
class_dev->devt = devt;
class_dev->dev = device;
class_dev->class = cls;
+ class_dev->parent = parent;
+ class_dev->release = class_device_create_release;
+ class_dev->hotplug = class_device_create_hotplug;
va_start(args, fmt);
vsnprintf(class_dev->class_id, BUS_ID_SIZE, fmt, args);
@@ -602,17 +650,18 @@ error:
void class_device_del(struct class_device *class_dev)
{
- struct class * parent = class_dev->class;
- struct class_interface * class_intf;
+ struct class *parent_class = class_dev->class;
+ struct class_device *parent_device = class_dev->parent;
+ struct class_interface *class_intf;
char *class_name = NULL;
- if (parent) {
- down(&parent->sem);
+ if (parent_class) {
+ down(&parent_class->sem);
list_del_init(&class_dev->node);
- list_for_each_entry(class_intf, &parent->interfaces, node)
+ list_for_each_entry(class_intf, &parent_class->interfaces, node)
if (class_intf->remove)
- class_intf->remove(class_dev);
- up(&parent->sem);
+ class_intf->remove(class_dev, class_intf);
+ up(&parent_class->sem);
}
if (class_dev->dev) {
@@ -620,6 +669,7 @@ void class_device_del(struct class_device *class_dev)
sysfs_remove_link(&class_dev->kobj, "device");
sysfs_remove_link(&class_dev->dev->kobj, class_name);
}
+ class_device_remove_file(class_dev, &class_dev->uevent_attr);
if (class_dev->devt_attr)
class_device_remove_file(class_dev, class_dev->devt_attr);
class_device_remove_attrs(class_dev);
@@ -627,8 +677,8 @@ void class_device_del(struct class_device *class_dev)
kobject_hotplug(&class_dev->kobj, KOBJ_REMOVE);
kobject_del(&class_dev->kobj);
- if (parent)
- class_put(parent);
+ class_device_put(parent_device);
+ class_put(parent_class);
kfree(class_name);
}
@@ -708,7 +758,8 @@ struct class_device * class_device_get(struct class_device *class_dev)
void class_device_put(struct class_device *class_dev)
{
- kobject_put(&class_dev->kobj);
+ if (class_dev)
+ kobject_put(&class_dev->kobj);
}
@@ -728,7 +779,7 @@ int class_interface_register(struct class_interface *class_intf)
list_add_tail(&class_intf->node, &parent->interfaces);
if (class_intf->add) {
list_for_each_entry(class_dev, &parent->children, node)
- class_intf->add(class_dev);
+ class_intf->add(class_dev, class_intf);
}
up(&parent->sem);
@@ -747,7 +798,7 @@ void class_interface_unregister(struct class_interface *class_intf)
list_del_init(&class_intf->node);
if (class_intf->remove) {
list_for_each_entry(class_dev, &parent->children, node)
- class_intf->remove(class_dev);
+ class_intf->remove(class_dev, class_intf);
}
up(&parent->sem);
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 6ab73f5c799a..8615b42b517a 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -154,6 +154,13 @@ static struct kset_hotplug_ops device_hotplug_ops = {
.hotplug = dev_hotplug,
};
+static ssize_t store_uevent(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ kobject_hotplug(&dev->kobj, KOBJ_ADD);
+ return count;
+}
+
/**
* device_subsys - structure to be registered with kobject core.
*/
@@ -225,6 +232,7 @@ void device_initialize(struct device *dev)
klist_children_put);
INIT_LIST_HEAD(&dev->dma_pools);
init_MUTEX(&dev->sem);
+ device_init_wakeup(dev, 0);
}
/**
@@ -258,6 +266,14 @@ int device_add(struct device *dev)
if ((error = kobject_add(&dev->kobj)))
goto Error;
+
+ dev->uevent_attr.attr.name = "uevent";
+ dev->uevent_attr.attr.mode = S_IWUSR;
+ if (dev->driver)
+ dev->uevent_attr.attr.owner = dev->driver->owner;
+ dev->uevent_attr.store = store_uevent;
+ device_create_file(dev, &dev->uevent_attr);
+
kobject_hotplug(&dev->kobj, KOBJ_ADD);
if ((error = device_pm_add(dev)))
goto PMError;
@@ -349,6 +365,7 @@ void device_del(struct device * dev)
if (parent)
klist_del(&dev->knode_parent);
+ device_remove_file(dev, &dev->uevent_attr);
/* Notify the platform of the removal, in case they
* need to do anything...
@@ -390,11 +407,11 @@ static struct device * next_device(struct klist_iter * i)
/**
* device_for_each_child - device child iterator.
- * @dev: parent struct device.
+ * @parent: parent struct device.
* @data: data for the callback.
* @fn: function to be called for each device.
*
- * Iterate over @dev's child devices, and call @fn for each,
+ * Iterate over @parent's child devices, and call @fn for each,
* passing it @data.
*
* We check the return of @fn each time. If it returns anything
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index b79badd0f158..a95844790f7b 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -9,12 +9,15 @@
#include <linux/topology.h>
#include <linux/device.h>
+#include "base.h"
struct sysdev_class cpu_sysdev_class = {
set_kset_name("cpu"),
};
EXPORT_SYMBOL(cpu_sysdev_class);
+static struct sys_device *cpu_sys_devices[NR_CPUS];
+
#ifdef CONFIG_HOTPLUG_CPU
int __attribute__((weak)) smp_prepare_cpu (int cpu)
{
@@ -63,6 +66,7 @@ static void __devinit register_cpu_control(struct cpu *cpu)
}
void unregister_cpu(struct cpu *cpu, struct node *root)
{
+ int logical_cpu = cpu->sysdev.id;
if (root)
sysfs_remove_link(&root->sysdev.kobj,
@@ -70,7 +74,7 @@ void unregister_cpu(struct cpu *cpu, struct node *root)
sysdev_remove_file(&cpu->sysdev, &attr_online);
sysdev_unregister(&cpu->sysdev);
-
+ cpu_sys_devices[logical_cpu] = NULL;
return;
}
#else /* ... !CONFIG_HOTPLUG_CPU */
@@ -102,10 +106,19 @@ int __devinit register_cpu(struct cpu *cpu, int num, struct node *root)
kobject_name(&cpu->sysdev.kobj));
if (!error && !cpu->no_control)
register_cpu_control(cpu);
+ if (!error)
+ cpu_sys_devices[num] = &cpu->sysdev;
return error;
}
-
+struct sys_device *get_cpu_sysdev(int cpu)
+{
+ if (cpu < NR_CPUS)
+ return cpu_sys_devices[cpu];
+ else
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(get_cpu_sysdev);
int __init cpu_dev_init(void)
{
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index ef3fe513e398..161f3a390d90 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -28,6 +28,7 @@ static struct device * next_device(struct klist_iter * i)
/**
* driver_for_each_device - Iterator for devices bound to a driver.
* @drv: Driver we're iterating.
+ * @start: Device to begin with
* @data: Data to pass to the callback.
* @fn: Function to call for each device.
*
@@ -57,7 +58,7 @@ EXPORT_SYMBOL_GPL(driver_for_each_device);
/**
* driver_find_device - device iterator for locating a particular device.
- * @driver: The device's driver
+ * @drv: The device's driver
* @start: Device to begin with
* @data: Data to pass to match function
* @match: Callback function to check device
diff --git a/drivers/base/firmware.c b/drivers/base/firmware.c
index 88ab044932f2..cb1b98ae0d58 100644
--- a/drivers/base/firmware.c
+++ b/drivers/base/firmware.c
@@ -11,6 +11,9 @@
#include <linux/kobject.h>
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/device.h>
+
+#include "base.h"
static decl_subsys(firmware, NULL, NULL);
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 4acb2c5733c3..98f6c02d6790 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -62,14 +62,16 @@ firmware_timeout_show(struct class *class, char *buf)
}
/**
- * firmware_timeout_store:
- * Description:
+ * firmware_timeout_store - set number of seconds to wait for firmware
+ * @class: device class pointer
+ * @buf: buffer to scan for timeout value
+ * @count: number of bytes in @buf
+ *
* Sets the number of seconds to wait for the firmware. Once
- * this expires an error will be return to the driver and no
+ * this expires an error will be returned to the driver and no
* firmware will be provided.
*
- * Note: zero means 'wait for ever'
- *
+ * Note: zero means 'wait forever'.
**/
static ssize_t
firmware_timeout_store(struct class *class, const char *buf, size_t count)
@@ -123,12 +125,15 @@ firmware_loading_show(struct class_device *class_dev, char *buf)
}
/**
- * firmware_loading_store: - loading control file
- * Description:
+ * firmware_loading_store - set value in the 'loading' control file
+ * @class_dev: class_device pointer
+ * @buf: buffer to scan for loading control value
+ * @count: number of bytes in @buf
+ *
* The relevant values are:
*
* 1: Start a load, discarding any previous partial load.
- * 0: Conclude the load and handle the data to the driver code.
+ * 0: Conclude the load and hand the data to the driver code.
* -1: Conclude the load with an error and discard any written data.
**/
static ssize_t
@@ -201,6 +206,7 @@ out:
up(&fw_lock);
return ret_count;
}
+
static int
fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
{
@@ -227,11 +233,13 @@ fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
}
/**
- * firmware_data_write:
+ * firmware_data_write - write method for firmware
+ * @kobj: kobject for the class_device
+ * @buffer: buffer being written
+ * @offset: buffer offset for write in total data store area
+ * @count: buffer size
*
- * Description:
- *
- * Data written to the 'data' attribute will be later handled to
+ * Data written to the 'data' attribute will be later handed to
* the driver as a firmware image.
**/
static ssize_t
@@ -264,6 +272,7 @@ out:
up(&fw_lock);
return retval;
}
+
static struct bin_attribute firmware_attr_data_tmpl = {
.attr = {.name = "data", .mode = 0644, .owner = THIS_MODULE},
.size = 0,
@@ -448,13 +457,16 @@ out:
/**
* request_firmware: - request firmware to hotplug and wait for it
- * Description:
- * @firmware will be used to return a firmware image by the name
+ * @firmware_p: pointer to firmware image
+ * @name: name of firmware file
+ * @device: device for which firmware is being loaded
+ *
+ * @firmware_p will be used to return a firmware image by the name
* of @name for device @device.
*
* Should be called from user context where sleeping is allowed.
*
- * @name will be use as $FIRMWARE in the hotplug environment and
+ * @name will be used as $FIRMWARE in the hotplug environment and
* should be distinctive enough not to be confused with any other
* firmware image for this or any other device.
**/
@@ -468,6 +480,7 @@ request_firmware(const struct firmware **firmware_p, const char *name,
/**
* release_firmware: - release the resource associated with a firmware image
+ * @fw: firmware resource to release
**/
void
release_firmware(const struct firmware *fw)
@@ -480,8 +493,10 @@ release_firmware(const struct firmware *fw)
/**
* register_firmware: - provide a firmware image for later usage
+ * @name: name of firmware image file
+ * @data: buffer pointer for the firmware image
+ * @size: size of the data buffer area
*
- * Description:
* Make sure that @data will be available by requesting firmware @name.
*
* Note: This will not be possible until some kind of persistence
@@ -526,21 +541,19 @@ request_firmware_work_func(void *arg)
}
/**
- * request_firmware_nowait:
+ * request_firmware_nowait: asynchronous version of request_firmware
+ * @module: module requesting the firmware
+ * @hotplug: invokes hotplug event to copy the firmware image if this flag
+ * is non-zero else the firmware copy must be done manually.
+ * @name: name of firmware file
+ * @device: device for which firmware is being loaded
+ * @context: will be passed over to @cont, and
+ * @fw may be %NULL if firmware request fails.
+ * @cont: function will be called asynchronously when the firmware
+ * request is over.
*
- * Description:
* Asynchronous variant of request_firmware() for contexts where
* it is not possible to sleep.
- *
- * @hotplug invokes hotplug event to copy the firmware image if this flag
- * is non-zero else the firmware copy must be done manually.
- *
- * @cont will be called asynchronously when the firmware request is over.
- *
- * @context will be passed over to @cont.
- *
- * @fw may be %NULL if firmware request fails.
- *
**/
int
request_firmware_nowait(
diff --git a/drivers/base/init.c b/drivers/base/init.c
index a76ae5a221f3..c648914b9cde 100644
--- a/drivers/base/init.c
+++ b/drivers/base/init.c
@@ -9,15 +9,10 @@
#include <linux/device.h>
#include <linux/init.h>
+#include <linux/memory.h>
+
+#include "base.h"
-extern int devices_init(void);
-extern int buses_init(void);
-extern int classes_init(void);
-extern int firmware_init(void);
-extern int platform_bus_init(void);
-extern int system_bus_init(void);
-extern int cpu_dev_init(void);
-extern int attribute_container_init(void);
/**
* driver_init - initialize driver model.
*
@@ -39,5 +34,6 @@ void __init driver_init(void)
platform_bus_init();
system_bus_init();
cpu_dev_init();
+ memory_dev_init();
attribute_container_init();
}
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
new file mode 100644
index 000000000000..b7ddd651d664
--- /dev/null
+++ b/drivers/base/memory.c
@@ -0,0 +1,452 @@
+/*
+ * drivers/base/memory.c - basic Memory class support
+ *
+ * Written by Matt Tolentino <matthew.e.tolentino@intel.com>
+ * Dave Hansen <haveblue@us.ibm.com>
+ *
+ * This file provides the necessary infrastructure to represent
+ * a SPARSEMEM-memory-model system's physical memory in /sysfs.
+ * All arch-independent code that assumes MEMORY_HOTPLUG requires
+ * SPARSEMEM should be contained here, or in mm/memory_hotplug.c.
+ */
+
+#include <linux/sysdev.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/sched.h> /* capable() */
+#include <linux/topology.h>
+#include <linux/device.h>
+#include <linux/memory.h>
+#include <linux/kobject.h>
+#include <linux/memory_hotplug.h>
+#include <linux/mm.h>
+#include <asm/atomic.h>
+#include <asm/uaccess.h>
+
+#define MEMORY_CLASS_NAME "memory"
+
+static struct sysdev_class memory_sysdev_class = {
+ set_kset_name(MEMORY_CLASS_NAME),
+};
+EXPORT_SYMBOL(memory_sysdev_class);
+
+static char *memory_hotplug_name(struct kset *kset, struct kobject *kobj)
+{
+ return MEMORY_CLASS_NAME;
+}
+
+static int memory_hotplug(struct kset *kset, struct kobject *kobj, char **envp,
+ int num_envp, char *buffer, int buffer_size)
+{
+ int retval = 0;
+
+ return retval;
+}
+
+static struct kset_hotplug_ops memory_hotplug_ops = {
+ .name = memory_hotplug_name,
+ .hotplug = memory_hotplug,
+};
+
+static struct notifier_block *memory_chain;
+
+static int register_memory_notifier(struct notifier_block *nb)
+{
+ return notifier_chain_register(&memory_chain, nb);
+}
+
+static void unregister_memory_notifier(struct notifier_block *nb)
+{
+ notifier_chain_unregister(&memory_chain, nb);
+}
+
+/*
+ * register_memory - Setup a sysfs device for a memory block
+ */
+static int
+register_memory(struct memory_block *memory, struct mem_section *section,
+ struct node *root)
+{
+ int error;
+
+ memory->sysdev.cls = &memory_sysdev_class;
+ memory->sysdev.id = __section_nr(section);
+
+ error = sysdev_register(&memory->sysdev);
+
+ if (root && !error)
+ error = sysfs_create_link(&root->sysdev.kobj,
+ &memory->sysdev.kobj,
+ kobject_name(&memory->sysdev.kobj));
+
+ return error;
+}
+
+static void
+unregister_memory(struct memory_block *memory, struct mem_section *section,
+ struct node *root)
+{
+ BUG_ON(memory->sysdev.cls != &memory_sysdev_class);
+ BUG_ON(memory->sysdev.id != __section_nr(section));
+
+ sysdev_unregister(&memory->sysdev);
+ if (root)
+ sysfs_remove_link(&root->sysdev.kobj,
+ kobject_name(&memory->sysdev.kobj));
+}
+
+/*
+ * use this as the physical section index that this memsection
+ * uses.
+ */
+
+static ssize_t show_mem_phys_index(struct sys_device *dev, char *buf)
+{
+ struct memory_block *mem =
+ container_of(dev, struct memory_block, sysdev);
+ return sprintf(buf, "%08lx\n", mem->phys_index);
+}
+
+/*
+ * online, offline, going offline, etc.
+ */
+static ssize_t show_mem_state(struct sys_device *dev, char *buf)
+{
+ struct memory_block *mem =
+ container_of(dev, struct memory_block, sysdev);
+ ssize_t len = 0;
+
+ /*
+ * We can probably put these states in a nice little array
+ * so that they're not open-coded
+ */
+ switch (mem->state) {
+ case MEM_ONLINE:
+ len = sprintf(buf, "online\n");
+ break;
+ case MEM_OFFLINE:
+ len = sprintf(buf, "offline\n");
+ break;
+ case MEM_GOING_OFFLINE:
+ len = sprintf(buf, "going-offline\n");
+ break;
+ default:
+ len = sprintf(buf, "ERROR-UNKNOWN-%ld\n",
+ mem->state);
+ WARN_ON(1);
+ break;
+ }
+
+ return len;
+}
+
+static inline int memory_notify(unsigned long val, void *v)
+{
+ return notifier_call_chain(&memory_chain, val, v);
+}
+
+/*
+ * MEMORY_HOTPLUG depends on SPARSEMEM in mm/Kconfig, so it is
+ * OK to have direct references to sparsemem variables in here.
+ */
+static int
+memory_block_action(struct memory_block *mem, unsigned long action)
+{
+ int i;
+ unsigned long psection;
+ unsigned long start_pfn, start_paddr;
+ struct page *first_page;
+ int ret;
+ int old_state = mem->state;
+
+ psection = mem->phys_index;
+ first_page = pfn_to_page(psection << PFN_SECTION_SHIFT);
+
+ /*
+ * The probe routines leave the pages reserved, just
+ * as the bootmem code does. Make sure they're still
+ * that way.
+ */
+ if (action == MEM_ONLINE) {
+ for (i = 0; i < PAGES_PER_SECTION; i++) {
+ if (PageReserved(first_page+i))
+ continue;
+
+ printk(KERN_WARNING "section number %ld page number %d "
+ "not reserved, was it already online? \n",
+ psection, i);
+ return -EBUSY;
+ }
+ }
+
+ switch (action) {
+ case MEM_ONLINE:
+ start_pfn = page_to_pfn(first_page);
+ ret = online_pages(start_pfn, PAGES_PER_SECTION);
+ break;
+ case MEM_OFFLINE:
+ mem->state = MEM_GOING_OFFLINE;
+ memory_notify(MEM_GOING_OFFLINE, NULL);
+ start_paddr = page_to_pfn(first_page) << PAGE_SHIFT;
+ ret = remove_memory(start_paddr,
+ PAGES_PER_SECTION << PAGE_SHIFT);
+ if (ret) {
+ mem->state = old_state;
+ break;
+ }
+ memory_notify(MEM_MAPPING_INVALID, NULL);
+ break;
+ default:
+ printk(KERN_WARNING "%s(%p, %ld) unknown action: %ld\n",
+ __FUNCTION__, mem, action, action);
+ WARN_ON(1);
+ ret = -EINVAL;
+ }
+ /*
+ * For now, only notify on successful memory operations
+ */
+ if (!ret)
+ memory_notify(action, NULL);
+
+ return ret;
+}
+
+static int memory_block_change_state(struct memory_block *mem,
+ unsigned long to_state, unsigned long from_state_req)
+{
+ int ret = 0;
+ down(&mem->state_sem);
+
+ if (mem->state != from_state_req) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = memory_block_action(mem, to_state);
+ if (!ret)
+ mem->state = to_state;
+
+out:
+ up(&mem->state_sem);
+ return ret;
+}
+
+static ssize_t
+store_mem_state(struct sys_device *dev, const char *buf, size_t count)
+{
+ struct memory_block *mem;
+ unsigned int phys_section_nr;
+ int ret = -EINVAL;
+
+ mem = container_of(dev, struct memory_block, sysdev);
+ phys_section_nr = mem->phys_index;
+
+ if (!valid_section_nr(phys_section_nr))
+ goto out;
+
+ if (!strncmp(buf, "online", min((int)count, 6)))
+ ret = memory_block_change_state(mem, MEM_ONLINE, MEM_OFFLINE);
+ else if(!strncmp(buf, "offline", min((int)count, 7)))
+ ret = memory_block_change_state(mem, MEM_OFFLINE, MEM_ONLINE);
+out:
+ if (ret)
+ return ret;
+ return count;
+}
+
+/*
+ * phys_device is a bad name for this. What I really want
+ * is a way to differentiate between memory ranges that
+ * are part of physical devices that constitute
+ * a complete removable unit or fru.
+ * i.e. do these ranges belong to the same physical device,
+ * s.t. if I offline all of these sections I can then
+ * remove the physical device?
+ */
+static ssize_t show_phys_device(struct sys_device *dev, char *buf)
+{
+ struct memory_block *mem =
+ container_of(dev, struct memory_block, sysdev);
+ return sprintf(buf, "%d\n", mem->phys_device);
+}
+
+static SYSDEV_ATTR(phys_index, 0444, show_mem_phys_index, NULL);
+static SYSDEV_ATTR(state, 0644, show_mem_state, store_mem_state);
+static SYSDEV_ATTR(phys_device, 0444, show_phys_device, NULL);
+
+#define mem_create_simple_file(mem, attr_name) \
+ sysdev_create_file(&mem->sysdev, &attr_##attr_name)
+#define mem_remove_simple_file(mem, attr_name) \
+ sysdev_remove_file(&mem->sysdev, &attr_##attr_name)
+
+/*
+ * Block size attribute stuff
+ */
+static ssize_t
+print_block_size(struct class *class, char *buf)
+{
+ return sprintf(buf, "%lx\n", (unsigned long)PAGES_PER_SECTION * PAGE_SIZE);
+}
+
+static CLASS_ATTR(block_size_bytes, 0444, print_block_size, NULL);
+
+static int block_size_init(void)
+{
+ sysfs_create_file(&memory_sysdev_class.kset.kobj,
+ &class_attr_block_size_bytes.attr);
+ return 0;
+}
+
+/*
+ * Some architectures will have custom drivers to do this, and
+ * will not need to do it from userspace. The fake hot-add code
+ * as well as ppc64 will do all of their discovery in userspace
+ * and will require this interface.
+ */
+#ifdef CONFIG_ARCH_MEMORY_PROBE
+static ssize_t
+memory_probe_store(struct class *class, const char __user *buf, size_t count)
+{
+ u64 phys_addr;
+ int ret;
+
+ phys_addr = simple_strtoull(buf, NULL, 0);
+
+ ret = add_memory(phys_addr, PAGES_PER_SECTION << PAGE_SHIFT);
+
+ if (ret)
+ count = ret;
+
+ return count;
+}
+static CLASS_ATTR(probe, 0700, NULL, memory_probe_store);
+
+static int memory_probe_init(void)
+{
+ sysfs_create_file(&memory_sysdev_class.kset.kobj,
+ &class_attr_probe.attr);
+ return 0;
+}
+#else
+#define memory_probe_init(...) do {} while (0)
+#endif
+
+/*
+ * Note that phys_device is optional. It is here to allow for
+ * differentiation between which *physical* devices each
+ * section belongs to...
+ */
+
+static int add_memory_block(unsigned long node_id, struct mem_section *section,
+ unsigned long state, int phys_device)
+{
+ struct memory_block *mem = kzalloc(sizeof(*mem), GFP_KERNEL);
+ int ret = 0;
+
+ if (!mem)
+ return -ENOMEM;
+
+ mem->phys_index = __section_nr(section);
+ mem->state = state;
+ init_MUTEX(&mem->state_sem);
+ mem->phys_device = phys_device;
+
+ ret = register_memory(mem, section, NULL);
+ if (!ret)
+ ret = mem_create_simple_file(mem, phys_index);
+ if (!ret)
+ ret = mem_create_simple_file(mem, state);
+ if (!ret)
+ ret = mem_create_simple_file(mem, phys_device);
+
+ return ret;
+}
+
+/*
+ * For now, we have a linear search to go find the appropriate
+ * memory_block corresponding to a particular phys_index. If
+ * this gets to be a real problem, we can always use a radix
+ * tree or something here.
+ *
+ * This could be made generic for all sysdev classes.
+ */
+static struct memory_block *find_memory_block(struct mem_section *section)
+{
+ struct kobject *kobj;
+ struct sys_device *sysdev;
+ struct memory_block *mem;
+ char name[sizeof(MEMORY_CLASS_NAME) + 9 + 1];
+
+ /*
+ * This only works because we know that section == sysdev->id
+ * slightly redundant with sysdev_register()
+ */
+ sprintf(&name[0], "%s%d", MEMORY_CLASS_NAME, __section_nr(section));
+
+ kobj = kset_find_obj(&memory_sysdev_class.kset, name);
+ if (!kobj)
+ return NULL;
+
+ sysdev = container_of(kobj, struct sys_device, kobj);
+ mem = container_of(sysdev, struct memory_block, sysdev);
+
+ return mem;
+}
+
+int remove_memory_block(unsigned long node_id, struct mem_section *section,
+ int phys_device)
+{
+ struct memory_block *mem;
+
+ mem = find_memory_block(section);
+ mem_remove_simple_file(mem, phys_index);
+ mem_remove_simple_file(mem, state);
+ mem_remove_simple_file(mem, phys_device);
+ unregister_memory(mem, section, NULL);
+
+ return 0;
+}
+
+/*
+ * need an interface for the VM to add new memory regions,
+ * but without onlining it.
+ */
+int register_new_memory(struct mem_section *section)
+{
+ return add_memory_block(0, section, MEM_OFFLINE, 0);
+}
+
+int unregister_memory_section(struct mem_section *section)
+{
+ if (!valid_section(section))
+ return -EINVAL;
+
+ return remove_memory_block(0, section, 0);
+}
+
+/*
+ * Initialize the sysfs support for memory devices...
+ */
+int __init memory_dev_init(void)
+{
+ unsigned int i;
+ int ret;
+
+ memory_sysdev_class.kset.hotplug_ops = &memory_hotplug_ops;
+ ret = sysdev_class_register(&memory_sysdev_class);
+
+ /*
+ * Create entries for memory sections that were found
+ * during boot and have been initialized
+ */
+ for (i = 0; i < NR_MEM_SECTIONS; i++) {
+ if (!valid_section_nr(i))
+ continue;
+ add_memory_block(0, __nr_to_section(i), MEM_ONLINE, 0);
+ }
+
+ memory_probe_init();
+ block_size_init();
+
+ return ret;
+}
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 361e204209eb..d597c922af11 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -10,12 +10,15 @@
* information.
*/
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/bootmem.h>
#include <linux/err.h>
+#include <linux/slab.h>
+
+#include "base.h"
struct device platform_bus = {
.bus_id = "platform",
@@ -279,13 +282,9 @@ static int platform_suspend(struct device * dev, pm_message_t state)
{
int ret = 0;
- if (dev->driver && dev->driver->suspend) {
- ret = dev->driver->suspend(dev, state, SUSPEND_DISABLE);
- if (ret == 0)
- ret = dev->driver->suspend(dev, state, SUSPEND_SAVE_STATE);
- if (ret == 0)
- ret = dev->driver->suspend(dev, state, SUSPEND_POWER_DOWN);
- }
+ if (dev->driver && dev->driver->suspend)
+ ret = dev->driver->suspend(dev, state);
+
return ret;
}
@@ -293,13 +292,9 @@ static int platform_resume(struct device * dev)
{
int ret = 0;
- if (dev->driver && dev->driver->resume) {
- ret = dev->driver->resume(dev, RESUME_POWER_ON);
- if (ret == 0)
- ret = dev->driver->resume(dev, RESUME_RESTORE_STATE);
- if (ret == 0)
- ret = dev->driver->resume(dev, RESUME_ENABLE);
- }
+ if (dev->driver && dev->driver->resume)
+ ret = dev->driver->resume(dev);
+
return ret;
}
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 15e6a8f951f1..0d2e101e4f15 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -30,23 +30,6 @@ LIST_HEAD(dpm_off_irq);
DECLARE_MUTEX(dpm_sem);
DECLARE_MUTEX(dpm_list_sem);
-/*
- * PM Reference Counting.
- */
-
-static inline void device_pm_hold(struct device * dev)
-{
- if (dev)
- atomic_inc(&dev->power.pm_users);
-}
-
-static inline void device_pm_release(struct device * dev)
-{
- if (dev)
- atomic_dec(&dev->power.pm_users);
-}
-
-
/**
* device_pm_set_parent - Specify power dependency.
* @dev: Device who needs power.
@@ -62,10 +45,8 @@ static inline void device_pm_release(struct device * dev)
void device_pm_set_parent(struct device * dev, struct device * parent)
{
- struct device * old_parent = dev->power.pm_parent;
- device_pm_release(old_parent);
- dev->power.pm_parent = parent;
- device_pm_hold(parent);
+ put_device(dev->power.pm_parent);
+ dev->power.pm_parent = get_device(parent);
}
EXPORT_SYMBOL_GPL(device_pm_set_parent);
@@ -75,7 +56,6 @@ int device_pm_add(struct device * dev)
pr_debug("PM: Adding info for %s:%s\n",
dev->bus ? dev->bus->name : "No Bus", dev->kobj.name);
- atomic_set(&dev->power.pm_users, 0);
down(&dpm_list_sem);
list_add_tail(&dev->power.entry, &dpm_active);
device_pm_set_parent(dev, dev->parent);
@@ -91,7 +71,7 @@ void device_pm_remove(struct device * dev)
dev->bus ? dev->bus->name : "No Bus", dev->kobj.name);
down(&dpm_list_sem);
dpm_sysfs_remove(dev);
- device_pm_release(dev->power.pm_parent);
+ put_device(dev->power.pm_parent);
list_del_init(&dev->power.entry);
up(&dpm_list_sem);
}
diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
index 2e700d795cf1..fb3d35a9e101 100644
--- a/drivers/base/power/power.h
+++ b/drivers/base/power/power.h
@@ -67,9 +67,6 @@ extern int suspend_device(struct device *, pm_message_t);
* runtime.c
*/
-extern int dpm_runtime_suspend(struct device *, pm_message_t);
-extern void dpm_runtime_resume(struct device *);
-
#else /* CONFIG_PM */
@@ -82,14 +79,4 @@ static inline void device_pm_remove(struct device * dev)
}
-static inline int dpm_runtime_suspend(struct device * dev, pm_message_t state)
-{
- return 0;
-}
-
-static inline void dpm_runtime_resume(struct device * dev)
-{
-
-}
-
#endif
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index e8f0519f5dfa..adbc3148c039 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -36,6 +36,7 @@ void dpm_runtime_resume(struct device * dev)
runtime_resume(dev);
up(&dpm_sem);
}
+EXPORT_SYMBOL(dpm_runtime_resume);
/**
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index 8d04fb435c17..89c57875f3e5 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -48,8 +48,81 @@ static ssize_t state_store(struct device * dev, struct device_attribute *attr, c
static DEVICE_ATTR(state, 0644, state_show, state_store);
+/*
+ * wakeup - Report/change current wakeup option for device
+ *
+ * Some devices support "wakeup" events, which are hardware signals
+ * used to activate devices from suspended or low power states. Such
+ * devices have one of three values for the sysfs power/wakeup file:
+ *
+ * + "enabled\n" to issue the events;
+ * + "disabled\n" not to do so; or
+ * + "\n" for temporary or permanent inability to issue wakeup.
+ *
+ * (For example, unconfigured USB devices can't issue wakeups.)
+ *
+ * Familiar examples of devices that can issue wakeup events include
+ * keyboards and mice (both PS2 and USB styles), power buttons, modems,
+ * "Wake-On-LAN" Ethernet links, GPIO lines, and more. Some events
+ * will wake the entire system from a suspend state; others may just
+ * wake up the device (if the system as a whole is already active).
+ * Some wakeup events use normal IRQ lines; other use special out
+ * of band signaling.
+ *
+ * It is the responsibility of device drivers to enable (or disable)
+ * wakeup signaling as part of changing device power states, respecting
+ * the policy choices provided through the driver model.
+ *
+ * Devices may not be able to generate wakeup events from all power
+ * states. Also, the events may be ignored in some configurations;
+ * for example, they might need help from other devices that aren't
+ * active, or which may have wakeup disabled. Some drivers rely on
+ * wakeup events internally (unless they are disabled), keeping
+ * their hardware in low power modes whenever they're unused. This
+ * saves runtime power, without requiring system-wide sleep states.
+ */
+
+static const char enabled[] = "enabled";
+static const char disabled[] = "disabled";
+
+static ssize_t
+wake_show(struct device * dev, struct device_attribute *attr, char * buf)
+{
+ return sprintf(buf, "%s\n", device_can_wakeup(dev)
+ ? (device_may_wakeup(dev) ? enabled : disabled)
+ : "");
+}
+
+static ssize_t
+wake_store(struct device * dev, struct device_attribute *attr,
+ const char * buf, size_t n)
+{
+ char *cp;
+ int len = n;
+
+ if (!device_can_wakeup(dev))
+ return -EINVAL;
+
+ cp = memchr(buf, '\n', n);
+ if (cp)
+ len = cp - buf;
+ if (len == sizeof enabled - 1
+ && strncmp(buf, enabled, sizeof enabled - 1) == 0)
+ device_set_wakeup_enable(dev, 1);
+ else if (len == sizeof disabled - 1
+ && strncmp(buf, disabled, sizeof disabled - 1) == 0)
+ device_set_wakeup_enable(dev, 0);
+ else
+ return -EINVAL;
+ return n;
+}
+
+static DEVICE_ATTR(wakeup, 0644, wake_show, wake_store);
+
+
static struct attribute * power_attrs[] = {
&dev_attr_state.attr,
+ &dev_attr_wakeup.attr,
NULL,
};
static struct attribute_group pm_attr_group = {
diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index 3431eb6004c3..66ed8f2fece5 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -21,6 +21,7 @@
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/pm.h>
+#include <asm/semaphore.h>
extern struct subsystem devices_subsys;
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