diff options
Diffstat (limited to 'drivers/base')
-rw-r--r-- | drivers/base/Kconfig | 4 | ||||
-rw-r--r-- | drivers/base/Makefile | 2 | ||||
-rw-r--r-- | drivers/base/attribute_container.c | 8 | ||||
-rw-r--r-- | drivers/base/base.h | 9 | ||||
-rw-r--r-- | drivers/base/bus.c | 28 | ||||
-rw-r--r-- | drivers/base/class.c | 112 | ||||
-rw-r--r-- | drivers/base/core.c | 197 | ||||
-rw-r--r-- | drivers/base/firmware_class.c | 22 | ||||
-rw-r--r-- | drivers/base/hypervisor.c | 19 | ||||
-rw-r--r-- | drivers/base/init.c | 1 | ||||
-rw-r--r-- | drivers/base/isa.c | 180 | ||||
-rw-r--r-- | drivers/base/platform.c | 35 | ||||
-rw-r--r-- | drivers/base/power/Makefile | 3 | ||||
-rw-r--r-- | drivers/base/power/suspend.c | 17 | ||||
-rw-r--r-- | drivers/base/sys.c | 51 |
15 files changed, 619 insertions, 69 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index f0eff3dac58..80502dc6ed6 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -38,3 +38,7 @@ config DEBUG_DRIVER If you are unsure about this, say N here. endmenu + +config SYS_HYPERVISOR + bool + default n diff --git a/drivers/base/Makefile b/drivers/base/Makefile index e99471d3232..b539e5e75b5 100644 --- a/drivers/base/Makefile +++ b/drivers/base/Makefile @@ -5,10 +5,12 @@ obj-y := core.o sys.o bus.o dd.o \ cpu.o firmware.o init.o map.o dmapool.o \ attribute_container.o transport_class.o obj-y += power/ +obj-$(CONFIG_ISA) += isa.o obj-$(CONFIG_FW_LOADER) += firmware_class.o obj-$(CONFIG_NUMA) += node.o obj-$(CONFIG_MEMORY_HOTPLUG) += memory.o obj-$(CONFIG_SMP) += topology.o +obj-$(CONFIG_SYS_HYPERVISOR) += hypervisor.o ifeq ($(CONFIG_DEBUG_DRIVER),y) EXTRA_CFLAGS += -DDEBUG diff --git a/drivers/base/attribute_container.c b/drivers/base/attribute_container.c index 2a7d7ae83e1..22220733f76 100644 --- a/drivers/base/attribute_container.c +++ b/drivers/base/attribute_container.c @@ -236,7 +236,6 @@ attribute_container_remove_device(struct device *dev, } up(&attribute_container_mutex); } -EXPORT_SYMBOL_GPL(attribute_container_remove_device); /** * attribute_container_device_trigger - execute a trigger for each matching classdev @@ -276,7 +275,6 @@ attribute_container_device_trigger(struct device *dev, } up(&attribute_container_mutex); } -EXPORT_SYMBOL_GPL(attribute_container_device_trigger); /** * attribute_container_trigger - trigger a function for each matching container @@ -304,7 +302,6 @@ attribute_container_trigger(struct device *dev, } up(&attribute_container_mutex); } -EXPORT_SYMBOL_GPL(attribute_container_trigger); /** * attribute_container_add_attrs - add attributes @@ -333,7 +330,6 @@ attribute_container_add_attrs(struct class_device *classdev) return 0; } -EXPORT_SYMBOL_GPL(attribute_container_add_attrs); /** * attribute_container_add_class_device - same function as class_device_add @@ -352,7 +348,6 @@ attribute_container_add_class_device(struct class_device *classdev) return error; return attribute_container_add_attrs(classdev); } -EXPORT_SYMBOL_GPL(attribute_container_add_class_device); /** * attribute_container_add_class_device_adapter - simple adapter for triggers @@ -367,7 +362,6 @@ attribute_container_add_class_device_adapter(struct attribute_container *cont, { return attribute_container_add_class_device(classdev); } -EXPORT_SYMBOL_GPL(attribute_container_add_class_device_adapter); /** * attribute_container_remove_attrs - remove any attribute files @@ -389,7 +383,6 @@ attribute_container_remove_attrs(struct class_device *classdev) for (i = 0; attrs[i]; i++) class_device_remove_file(classdev, attrs[i]); } -EXPORT_SYMBOL_GPL(attribute_container_remove_attrs); /** * attribute_container_class_device_del - equivalent of class_device_del @@ -405,7 +398,6 @@ attribute_container_class_device_del(struct class_device *classdev) attribute_container_remove_attrs(classdev); class_device_del(classdev); } -EXPORT_SYMBOL_GPL(attribute_container_class_device_del); /** * attribute_container_find_class_device - find the corresponding class_device diff --git a/drivers/base/base.h b/drivers/base/base.h index 5735b38582d..c3b8dc98b8a 100644 --- a/drivers/base/base.h +++ b/drivers/base/base.h @@ -5,13 +5,21 @@ extern int devices_init(void); extern int buses_init(void); extern int classes_init(void); extern int firmware_init(void); +#ifdef CONFIG_SYS_HYPERVISOR +extern int hypervisor_init(void); +#else +static inline int hypervisor_init(void) { return 0; } +#endif 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_attach_device(struct device * dev); extern void bus_remove_device(struct device * dev); +extern struct bus_type *get_bus(struct bus_type * bus); +extern void put_bus(struct bus_type * bus); extern int bus_add_driver(struct device_driver *); extern void bus_remove_driver(struct device_driver *); @@ -34,4 +42,5 @@ struct class_device_attribute *to_class_dev_attr(struct attribute *_attr) return container_of(_attr, struct class_device_attribute, attr); } +extern char *make_class_name(const char *name, struct kobject *kobj); diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 76656acd00d..050d86d0b87 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -362,8 +362,7 @@ static void device_remove_attrs(struct bus_type * bus, struct device * dev) * @dev: device being added * * - Add the device to its bus's list of devices. - * - Try to attach to driver. - * - Create link to device's physical location. + * - Create link to device's bus. */ int bus_add_device(struct device * dev) { @@ -372,11 +371,10 @@ int bus_add_device(struct device * dev) if (bus) { pr_debug("bus %s: add device %s\n", bus->name, dev->bus_id); - device_attach(dev); - klist_add_tail(&dev->knode_bus, &bus->klist_devices); error = device_add_attrs(bus, dev); if (!error) { sysfs_create_link(&bus->devices.kobj, &dev->kobj, dev->bus_id); + sysfs_create_link(&dev->kobj, &dev->bus->subsys.kset.kobj, "subsystem"); sysfs_create_link(&dev->kobj, &dev->bus->subsys.kset.kobj, "bus"); } } @@ -384,6 +382,22 @@ int bus_add_device(struct device * dev) } /** + * bus_attach_device - add device to bus + * @dev: device tried to attach to a driver + * + * - Try to attach to driver. + */ +void bus_attach_device(struct device * dev) +{ + struct bus_type * bus = dev->bus; + + if (bus) { + device_attach(dev); + klist_add_tail(&dev->knode_bus, &bus->klist_devices); + } +} + +/** * bus_remove_device - remove device from bus * @dev: device to be removed * @@ -395,6 +409,7 @@ int bus_add_device(struct device * dev) void bus_remove_device(struct device * dev) { if (dev->bus) { + sysfs_remove_link(&dev->kobj, "subsystem"); sysfs_remove_link(&dev->kobj, "bus"); sysfs_remove_link(&dev->bus->devices.kobj, dev->bus_id); device_remove_attrs(dev->bus, dev); @@ -732,14 +747,9 @@ EXPORT_SYMBOL_GPL(bus_for_each_dev); EXPORT_SYMBOL_GPL(bus_find_device); EXPORT_SYMBOL_GPL(bus_for_each_drv); -EXPORT_SYMBOL_GPL(bus_add_device); -EXPORT_SYMBOL_GPL(bus_remove_device); EXPORT_SYMBOL_GPL(bus_register); EXPORT_SYMBOL_GPL(bus_unregister); EXPORT_SYMBOL_GPL(bus_rescan_devices); -EXPORT_SYMBOL_GPL(get_bus); -EXPORT_SYMBOL_GPL(put_bus); -EXPORT_SYMBOL_GPL(find_bus); EXPORT_SYMBOL_GPL(bus_create_file); EXPORT_SYMBOL_GPL(bus_remove_file); diff --git a/drivers/base/class.c b/drivers/base/class.c index b1ea4df85c7..9aa12746026 100644 --- a/drivers/base/class.c +++ b/drivers/base/class.c @@ -91,14 +91,14 @@ void class_remove_file(struct class * cls, const struct class_attribute * attr) sysfs_remove_file(&cls->subsys.kset.kobj, &attr->attr); } -struct class * class_get(struct class * cls) +static struct class *class_get(struct class *cls) { if (cls) return container_of(subsys_get(&cls->subsys), struct class, subsys); return NULL; } -void class_put(struct class * cls) +static void class_put(struct class * cls) { if (cls) subsys_put(&cls->subsys); @@ -142,6 +142,7 @@ int class_register(struct class * cls) pr_debug("device class '%s': registering\n", cls->name); INIT_LIST_HEAD(&cls->children); + INIT_LIST_HEAD(&cls->devices); INIT_LIST_HEAD(&cls->interfaces); init_MUTEX(&cls->sem); error = kobject_set_name(&cls->subsys.kset.kobj, "%s", cls->name); @@ -504,22 +505,21 @@ void class_device_initialize(struct class_device *class_dev) INIT_LIST_HEAD(&class_dev->node); } -static char *make_class_name(struct class_device *class_dev) +char *make_class_name(const char *name, struct kobject *kobj) { - char *name; + char *class_name; int size; - size = strlen(class_dev->class->name) + - strlen(kobject_name(&class_dev->kobj)) + 2; + size = strlen(name) + strlen(kobject_name(kobj)) + 2; - name = kmalloc(size, GFP_KERNEL); - if (!name) + class_name = kmalloc(size, GFP_KERNEL); + if (!class_name) return ERR_PTR(-ENOMEM); - strcpy(name, class_dev->class->name); - strcat(name, ":"); - strcat(name, kobject_name(&class_dev->kobj)); - return name; + strcpy(class_name, name); + strcat(class_name, ":"); + strcat(class_name, kobject_name(kobj)); + return class_name; } int class_device_add(struct class_device *class_dev) @@ -535,18 +535,22 @@ int class_device_add(struct class_device *class_dev) return -EINVAL; if (!strlen(class_dev->class_id)) - goto register_done; + goto out1; parent_class = class_get(class_dev->class); if (!parent_class) - goto register_done; + goto out1; + 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); + error = kobject_set_name(&class_dev->kobj, "%s", class_dev->class_id); + if (error) + goto out2; + if (parent_class_dev) class_dev->kobj.parent = &parent_class_dev->kobj; else @@ -554,41 +558,58 @@ int class_device_add(struct class_device *class_dev) error = kobject_add(&class_dev->kobj); if (error) - goto register_done; + goto out2; /* add the needed attributes to this device */ + sysfs_create_link(&class_dev->kobj, &parent_class->subsys.kset.kobj, "subsystem"); 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); + error = class_device_create_file(class_dev, &class_dev->uevent_attr); + if (error) + goto out3; if (MAJOR(class_dev->devt)) { struct class_device_attribute *attr; attr = kzalloc(sizeof(*attr), GFP_KERNEL); if (!attr) { error = -ENOMEM; - kobject_del(&class_dev->kobj); - goto register_done; + goto out4; } attr->attr.name = "dev"; attr->attr.mode = S_IRUGO; attr->attr.owner = parent_class->owner; attr->show = show_dev; - class_device_create_file(class_dev, attr); + error = class_device_create_file(class_dev, attr); + if (error) { + kfree(attr); + goto out4; + } + class_dev->devt_attr = attr; } - class_device_add_attrs(class_dev); + error = class_device_add_attrs(class_dev); + if (error) + goto out5; + if (class_dev->dev) { - class_name = make_class_name(class_dev); - sysfs_create_link(&class_dev->kobj, - &class_dev->dev->kobj, "device"); - sysfs_create_link(&class_dev->dev->kobj, &class_dev->kobj, - class_name); + class_name = make_class_name(class_dev->class->name, + &class_dev->kobj); + error = sysfs_create_link(&class_dev->kobj, + &class_dev->dev->kobj, "device"); + if (error) + goto out6; + error = sysfs_create_link(&class_dev->dev->kobj, &class_dev->kobj, + class_name); + if (error) + goto out7; } - class_device_add_groups(class_dev); + error = class_device_add_groups(class_dev); + if (error) + goto out8; kobject_uevent(&class_dev->kobj, KOBJ_ADD); @@ -601,11 +622,28 @@ int class_device_add(struct class_device *class_dev) } up(&parent_class->sem); - register_done: - if (error) { - class_put(parent_class); + goto out1; + + out8: + if (class_dev->dev) + sysfs_remove_link(&class_dev->kobj, class_name); + out7: + if (class_dev->dev) + sysfs_remove_link(&class_dev->kobj, "device"); + out6: + class_device_remove_attrs(class_dev); + out5: + if (class_dev->devt_attr) + class_device_remove_file(class_dev, class_dev->devt_attr); + out4: + class_device_remove_file(class_dev, &class_dev->uevent_attr); + out3: + kobject_del(&class_dev->kobj); + out2: + if(parent_class_dev) class_device_put(parent_class_dev); - } + class_put(parent_class); + out1: class_device_put(class_dev); kfree(class_name); return error; @@ -695,10 +733,12 @@ void class_device_del(struct class_device *class_dev) } if (class_dev->dev) { - class_name = make_class_name(class_dev); + class_name = make_class_name(class_dev->class->name, + &class_dev->kobj); sysfs_remove_link(&class_dev->kobj, "device"); sysfs_remove_link(&class_dev->dev->kobj, class_name); } + sysfs_remove_link(&class_dev->kobj, "subsystem"); 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); @@ -760,14 +800,16 @@ int class_device_rename(struct class_device *class_dev, char *new_name) new_name); if (class_dev->dev) - old_class_name = make_class_name(class_dev); + old_class_name = make_class_name(class_dev->class->name, + &class_dev->kobj); strlcpy(class_dev->class_id, new_name, KOBJ_NAME_LEN); error = kobject_rename(&class_dev->kobj, new_name); if (class_dev->dev) { - new_class_name = make_class_name(class_dev); + new_class_name = make_class_name(class_dev->class->name, + &class_dev->kobj); sysfs_create_link(&class_dev->dev->kobj, &class_dev->kobj, new_class_name); sysfs_remove_link(&class_dev->dev->kobj, old_class_name); @@ -858,8 +900,6 @@ EXPORT_SYMBOL_GPL(class_create_file); EXPORT_SYMBOL_GPL(class_remove_file); EXPORT_SYMBOL_GPL(class_register); EXPORT_SYMBOL_GPL(class_unregister); -EXPORT_SYMBOL_GPL(class_get); -EXPORT_SYMBOL_GPL(class_put); EXPORT_SYMBOL_GPL(class_create); EXPORT_SYMBOL_GPL(class_destroy); diff --git a/drivers/base/core.c b/drivers/base/core.c index 6b355bd7816..d0f84ff7877 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -15,6 +15,7 @@ #include <linux/module.h> #include <linux/slab.h> #include <linux/string.h> +#include <linux/kdev_t.h> #include <asm/semaphore.h> @@ -28,6 +29,22 @@ int (*platform_notify_remove)(struct device * dev) = NULL; * sysfs bindings for devices. */ +/** + * dev_driver_string - Return a device's driver name, if at all possible + * @dev: struct device to get the name of + * + * Will return the device's driver's name if it is bound to a device. If + * the device is not bound to a device, it will return the name of the bus + * it is attached to. If it is not attached to a bus either, an empty + * string will be returned. + */ +const char *dev_driver_string(struct device *dev) +{ + return dev->driver ? dev->driver->name : + (dev->bus ? dev->bus->name : ""); +} +EXPORT_SYMBOL_GPL(dev_driver_string); + #define to_dev(obj) container_of(obj, struct device, kobj) #define to_dev_attr(_attr) container_of(_attr, struct device_attribute, attr) @@ -98,6 +115,8 @@ static int dev_uevent_filter(struct kset *kset, struct kobject *kobj) struct device *dev = to_dev(kobj); if (dev->bus) return 1; + if (dev->class) + return 1; } return 0; } @@ -106,7 +125,11 @@ static const char *dev_uevent_name(struct kset *kset, struct kobject *kobj) { struct device *dev = to_dev(kobj); - return dev->bus->name; + if (dev->bus) + return dev->bus->name; + if (dev->class) + return dev->class->name; + return NULL; } static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp, @@ -117,6 +140,16 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp, int length = 0; int retval = 0; + /* add the major/minor if present */ + if (MAJOR(dev->devt)) { + add_uevent_var(envp, num_envp, &i, + buffer, buffer_size, &length, + "MAJOR=%u", MAJOR(dev->devt)); + add_uevent_var(envp, num_envp, &i, + buffer, buffer_size, &length, + "MINOR=%u", MINOR(dev->devt)); + } + /* add bus name of physical device */ if (dev->bus) add_uevent_var(envp, num_envp, &i, @@ -161,6 +194,12 @@ static ssize_t store_uevent(struct device *dev, struct device_attribute *attr, return count; } +static ssize_t show_dev(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return print_dev_t(buf, dev->devt); +} + /* * devices_subsys - structure to be registered with kobject core. */ @@ -231,6 +270,7 @@ void device_initialize(struct device *dev) klist_init(&dev->klist_children, klist_children_get, klist_children_put); INIT_LIST_HEAD(&dev->dma_pools); + INIT_LIST_HEAD(&dev->node); init_MUTEX(&dev->sem); device_init_wakeup(dev, 0); } @@ -249,6 +289,7 @@ void device_initialize(struct device *dev) int device_add(struct device *dev) { struct device *parent = NULL; + char *class_name = NULL; int error = -EINVAL; dev = get_device(dev); @@ -274,11 +315,44 @@ int device_add(struct device *dev) dev->uevent_attr.store = store_uevent; device_create_file(dev, &dev->uevent_attr); - kobject_uevent(&dev->kobj, KOBJ_ADD); + if (MAJOR(dev->devt)) { + struct device_attribute *attr; + attr = kzalloc(sizeof(*attr), GFP_KERNEL); + if (!attr) { + error = -ENOMEM; + goto PMError; + } + attr->attr.name = "dev"; + attr->attr.mode = S_IRUGO; + if (dev->driver) + attr->attr.owner = dev->driver->owner; + attr->show = show_dev; + error = device_create_file(dev, attr); + if (error) { + kfree(attr); + goto attrError; + } + + dev->devt_attr = attr; + } + + if (dev->class) { + sysfs_create_link(&dev->kobj, &dev->class->subsys.kset.kobj, + "subsystem"); + sysfs_create_link(&dev->class->subsys.kset.kobj, &dev->kobj, + dev->bus_id); + + sysfs_create_link(&dev->kobj, &dev->parent->kobj, "device"); + class_name = make_class_name(dev->class->name, &dev->kobj); + sysfs_create_link(&dev->parent->kobj, &dev->kobj, class_name); + } + if ((error = device_pm_add(dev))) goto PMError; if ((error = bus_add_device(dev))) goto BusError; + kobject_uevent(&dev->kobj, KOBJ_ADD); + bus_attach_device(dev); if (parent) klist_add_tail(&dev->knode_parent, &parent->klist_children); @@ -286,11 +360,17 @@ int device_add(struct device *dev) if (platform_notify) platform_notify(dev); Done: + kfree(class_name); put_device(dev); return error; BusError: device_pm_remove(dev); PMError: + if (dev->devt_attr) { + device_remove_file(dev, dev->devt_attr); + kfree(dev->devt_attr); + } + attrError: kobject_uevent(&dev->kobj, KOBJ_REMOVE); kobject_del(&dev->kobj); Error: @@ -362,9 +442,20 @@ void put_device(struct device * dev) void device_del(struct device * dev) { struct device * parent = dev->parent; + char *class_name = NULL; if (parent) klist_del(&dev->knode_parent); + if (dev->devt_attr) + device_remove_file(dev, dev->devt_attr); + if (dev->class) { + sysfs_remove_link(&dev->kobj, "subsystem"); + sysfs_remove_link(&dev->class->subsys.kset.kobj, dev->bus_id); + class_name = make_class_name(dev->class->name, &dev->kobj); + sysfs_remove_link(&dev->kobj, "device"); + sysfs_remove_link(&dev->parent->kobj, class_name); + kfree(class_name); + } device_remove_file(dev, &dev->uevent_attr); /* Notify the platform of the removal, in case they @@ -449,3 +540,105 @@ EXPORT_SYMBOL_GPL(put_device); EXPORT_SYMBOL_GPL(device_create_file); EXPORT_SYMBOL_GPL(device_remove_file); + + +static void device_create_release(struct device *dev) +{ + pr_debug("%s called for %s\n", __FUNCTION__, dev->bus_id); + kfree(dev); +} + +/** + * device_create - creates a 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 device of this new device, if any. + * @dev: the dev_t for the char device to be added. + * @fmt: string for the class device's name + * + * This function can be used by char device classes. A struct + * device will be created in sysfs, registered to the specified + * 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 device is passed in, the newly + * created struct device will be a child of that device in sysfs. The + * pointer to the struct 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 device *device_create(struct class *class, struct device *parent, + dev_t devt, char *fmt, ...) +{ + va_list args; + struct device *dev = NULL; + int retval = -ENODEV; + + if (class == NULL || IS_ERR(class)) + goto error; + if (parent == NULL) { + printk(KERN_WARNING "%s does not work yet for NULL parents\n", __FUNCTION__); + goto error; + } + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) { + retval = -ENOMEM; + goto error; + } + + dev->devt = devt; + dev->class = class; + dev->parent = parent; + dev->release = device_create_release; + + va_start(args, fmt); + vsnprintf(dev->bus_id, BUS_ID_SIZE, fmt, args); + va_end(args); + retval = device_register(dev); + if (retval) + goto error; + + /* tie the class to the device */ + down(&class->sem); + list_add_tail(&dev->node, &class->devices); + up(&class->sem); + + return dev; + +error: + kfree(dev); + return ERR_PTR(retval); +} +EXPORT_SYMBOL_GPL(device_create); + +/** + * device_destroy - removes a device that was created with device_create() + * @class: the pointer to the struct class that this device was registered * with. + * @dev: the dev_t of the device that was previously registered. + * + * This call unregisters and cleans up a class device that was created with a + * call to class_device_create() + */ +void device_destroy(struct class *class, dev_t devt) +{ + struct device *dev = NULL; + struct device *dev_tmp; + + down(&class->sem); + list_for_each_entry(dev_tmp, &class->devices, node) { + if (dev_tmp->devt == devt) { + dev = dev_tmp; + break; + } + } + up(&class->sem); + + if (dev) { + list_del_init(&dev->node); + device_unregister(dev); + } +} +EXPORT_SYMBOL_GPL(device_destroy); diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index 0c99ae6a340..5d6c011183f 100644 --- a/drivers/base/firmware_class.c +++ b/drivers/base/firmware_class.c @@ -15,7 +15,7 @@ #include <linux/vmalloc.h> #include <linux/interrupt.h> #include <linux/bitops.h> -#include <asm/semaphore.h> +#include <linux/mutex.h> #include <linux/firmware.h> #include "base.h" @@ -36,7 +36,7 @@ static int loading_timeout = 10; /* In seconds */ /* fw_lock could be moved to 'struct firmware_priv' but since it is just * guarding for corner cases a global lock should be OK */ -static DECLARE_MUTEX(fw_lock); +static DEFINE_MUTEX(fw_lock); struct firmware_priv { char fw_id[FIRMWARE_NAME_MAX]; @@ -142,9 +142,9 @@ firmware_loading_store(struct class_device *class_dev, switch (loading) { case 1: - down(&fw_lock); + mutex_lock(&fw_lock); if (!fw_priv->fw) { - up(&fw_lock); + mutex_unlock(&fw_lock); break; } vfree(fw_priv->fw->data); @@ -152,7 +152,7 @@ firmware_loading_store(struct class_device *class_dev, fw_priv->fw->size = 0; fw_priv->alloc_size = 0; set_bit(FW_STATUS_LOADING, &fw_priv->status); - up(&fw_lock); + mutex_unlock(&fw_lock); break; case 0: if (test_bit(FW_STATUS_LOADING, &fw_priv->status)) { @@ -185,7 +185,7 @@ firmware_data_read(struct kobject *kobj, struct firmware *fw; ssize_t ret_count = count; - down(&fw_lock); + mutex_lock(&fw_lock); fw = fw_priv->fw; if (!fw || test_bit(FW_STATUS_DONE, &fw_priv->status)) { ret_count = -ENODEV; @@ -200,7 +200,7 @@ firmware_data_read(struct kobject *kobj, memcpy(buffer, fw->data + offset, ret_count); out: - up(&fw_lock); + mutex_unlock(&fw_lock); return ret_count; } @@ -253,7 +253,7 @@ firmware_data_write(struct kobject *kobj, if (!capable(CAP_SYS_RAWIO)) return -EPERM; - down(&fw_lock); + mutex_lock(&fw_lock); fw = fw_priv->fw; if (!fw || test_bit(FW_STATUS_DONE, &fw_priv->status)) { retval = -ENODEV; @@ -268,7 +268,7 @@ firmware_data_write(struct kobject *kobj, fw->size = max_t(size_t, offset + count, fw->size); retval = count; out: - up(&fw_lock); + mutex_unlock(&fw_lock); return retval; } @@ -436,14 +436,14 @@ _request_firmware(const struct firmware **firmware_p, const char *name, } else wait_for_completion(&fw_priv->completion); - down(&fw_lock); + mutex_lock(&fw_lock); if (!fw_priv->fw->size || test_bit(FW_STATUS_ABORT, &fw_priv->status)) { retval = -ENOENT; release_firmware(fw_priv->fw); *firmware_p = NULL; } fw_priv->fw = NULL; - up(&fw_lock); + mutex_unlock(&fw_lock); class_device_unregister(class_dev); goto out; diff --git a/drivers/base/hypervisor.c b/drivers/base/hypervisor.c new file mode 100644 index 00000000000..0c85e9d6a44 --- /dev/null +++ b/drivers/base/hypervisor.c @@ -0,0 +1,19 @@ +/* + * hypervisor.c - /sys/hypervisor subsystem. + * + * This file is released under the GPLv2 + * + */ + +#include <linux/kobject.h> +#include <linux/device.h> + +#include "base.h" + +decl_subsys(hypervisor, NULL, NULL); +EXPORT_SYMBOL_GPL(hypervisor_subsys); + +int __init hypervisor_init(void) +{ + return subsystem_register(&hypervisor_subsys); +} diff --git a/drivers/base/init.c b/drivers/base/init.c index c648914b9cd..37138154f9e 100644 --- a/drivers/base/init.c +++ b/drivers/base/init.c @@ -27,6 +27,7 @@ void __init driver_init(void) buses_init(); classes_init(); firmware_init(); + hypervisor_init(); /* These are also core pieces, but must come after the * core core pieces. diff --git a/drivers/base/isa.c b/drivers/base/isa.c new file mode 100644 index 00000000000..d2222397a40 --- /dev/null +++ b/drivers/base/isa.c @@ -0,0 +1,180 @@ +/* + * ISA bus. + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/isa.h> + +static struct device isa_bus = { + .bus_id = "isa" +}; + +struct isa_dev { + struct device dev; + struct device *next; + unsigned int id; +}; + +#define to_isa_dev(x) container_of((x), struct isa_dev, dev) + +static int isa_bus_match(struct device *dev, struct device_driver *driver) +{ + struct isa_driver *isa_driver = to_isa_driver(driver); + + if (dev->platform_data == isa_driver) { + if (!isa_driver->match || + isa_driver->match(dev, to_isa_dev(dev)->id)) + return 1; + dev->platform_data = NULL; + } + return 0; +} + +static int isa_bus_probe(struct device *dev) +{ + struct isa_driver *isa_driver = dev->platform_data; + + if (isa_driver->probe) + return isa_driver->probe(dev, to_isa_dev(dev)->id); + + return 0; +} + +static int isa_bus_remove(struct device *dev) +{ + struct isa_driver *isa_driver = dev->platform_data; + + if (isa_driver->remove) + return isa_driver->remove(dev, to_isa_dev(dev)->id); + + return 0; +} + +static void isa_bus_shutdown(struct device *dev) +{ + struct isa_driver *isa_driver = dev->platform_data; + + if (isa_driver->shutdown) + isa_driver->shutdown(dev, to_isa_dev(dev)->id); +} + +static int isa_bus_suspend(struct device *dev, pm_message_t state) +{ + struct isa_driver *isa_driver = dev->platform_data; + + if (isa_driver->suspend) + return isa_driver->suspend(dev, to_isa_dev(dev)->id, state); + + return 0; +} + +static int isa_bus_resume(struct device *dev) +{ + struct isa_driver *isa_driver = dev->platform_data; + + if (isa_driver->resume) + return isa_driver->resume(dev, to_isa_dev(dev)->id); + + return 0; +} + +static struct bus_type isa_bus_type = { + .name = "isa", + .match = isa_bus_match, + .probe = isa_bus_probe, + .remove = isa_bus_remove, + .shutdown = isa_bus_shutdown, + .suspend = isa_bus_suspend, + .resume = isa_bus_resume +}; + +static void isa_dev_release(struct device *dev) +{ + kfree(to_isa_dev(dev)); +} + +void isa_unregister_driver(struct isa_driver *isa_driver) +{ + struct device *dev = isa_driver->devices; + + while (dev) { + struct device *tmp = to_isa_dev(dev)->next; + device_unregister(dev); + dev = tmp; + } + driver_unregister(&isa_driver->driver); +} +EXPORT_SYMBOL_GPL(isa_unregister_driver); + +int isa_register_driver(struct isa_driver *isa_driver, unsigned int ndev) +{ + int error; + unsigned int id; + + isa_driver->driver.bus = &isa_bus_type; + isa_driver->devices = NULL; + + error = driver_register(&isa_driver->driver); + if (error) + return error; + + for (id = 0; id < ndev; id++) { + struct isa_dev *isa_dev; + + isa_dev = kzalloc(sizeof *isa_dev, GFP_KERNEL); + if (!isa_dev) { + error = -ENOMEM; + break; + } + + isa_dev->dev.parent = &isa_bus; + isa_dev->dev.bus = &isa_bus_type; + + snprintf(isa_dev->dev.bus_id, BUS_ID_SIZE, "%s.%u", + isa_driver->driver.name, id); + + isa_dev->dev.platform_data = isa_driver; + isa_dev->dev.release = isa_dev_release; + isa_dev->id = id; + + error = device_register(&isa_dev->dev); + if (error) { + put_device(&isa_dev->dev); + break; + } + + if (isa_dev->dev.platform_data) { + isa_dev->next = isa_driver->devices; + isa_driver->devices = &isa_dev->dev; + } else + device_unregister(&isa_dev->dev); + } + + if (!error && !isa_driver->devices) + error = -ENODEV; + + if (error) + isa_unregister_driver(isa_driver); + + return error; +} +EXPORT_SYMBOL_GPL(isa_register_driver); + +static int __init isa_bus_init(void) +{ + int error; + + error = bus_register(&isa_bus_type); + if (!error) { + error = device_register(&isa_bus); + if (error) + bus_unregister(&isa_bus_type); + } + return error; +} + +device_initcall(isa_bus_init); diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 83f5c5984d1..2b8755db76c 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -275,7 +275,7 @@ int platform_device_add(struct platform_device *pdev) pr_debug("Registering platform device '%s'. Parent at %s\n", pdev->dev.bus_id, pdev->dev.parent->bus_id); - ret = device_register(&pdev->dev); + ret = device_add(&pdev->dev); if (ret == 0) return ret; @@ -452,6 +452,37 @@ void platform_driver_unregister(struct platform_driver *drv) EXPORT_SYMBOL_GPL(platform_driver_unregister); +/* modalias support enables more hands-off userspace setup: + * (a) environment variable lets new-style hotplug events work once system is + * fully running: "modprobe $MODALIAS" + * (b) sysfs attribute lets new-style coldplug recover from hotplug events + * mishandled before system is fully running: "modprobe $(cat modalias)" + */ +static ssize_t +modalias_show(struct device *dev, struct device_attribute *a, char *buf) +{ + struct platform_device *pdev = to_platform_device(dev); + int len = snprintf(buf, PAGE_SIZE, "%s\n", pdev->name); + + return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; +} + +static struct device_attribute platform_dev_attrs[] = { + __ATTR_RO(modalias), + __ATTR_NULL, +}; + +static int platform_uevent(struct device *dev, char **envp, int num_envp, + char *buffer, int buffer_size) +{ + struct platform_device *pdev = to_platform_device(dev); + + envp[0] = buffer; + snprintf(buffer, buffer_size, "MODALIAS=%s", pdev->name); + return 0; +} + + /** * platform_match - bind platform device to platform driver. * @dev: device. @@ -496,7 +527,9 @@ static int platform_resume(struct device * dev) struct bus_type platform_bus_type = { .name = "platform", + .dev_attrs = platform_dev_attrs, .match = platform_match, + .uevent = platform_uevent, .suspend = platform_suspend, .resume = platform_resume, }; diff --git a/drivers/base/power/Makefile b/drivers/base/power/Makefile index c0219ad94ac..ceeeba2c56c 100644 --- a/drivers/base/power/Makefile +++ b/drivers/base/power/Makefile @@ -4,3 +4,6 @@ obj-$(CONFIG_PM) += main.o suspend.o resume.o runtime.o sysfs.o ifeq ($(CONFIG_DEBUG_DRIVER),y) EXTRA_CFLAGS += -DDEBUG endif +ifeq ($(CONFIG_PM_DEBUG),y) +EXTRA_CFLAGS += -DDEBUG +endif diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c index 2a769cc6f5f..1a1fe43a305 100644 --- a/drivers/base/power/suspend.c +++ b/drivers/base/power/suspend.c @@ -29,6 +29,15 @@ * lists. This way, the ancestors will be accessed before their descendents. */ +static inline char *suspend_verb(u32 event) +{ + switch (event) { + case PM_EVENT_SUSPEND: return "suspend"; + case PM_EVENT_FREEZE: return "freeze"; + default: return "(unknown suspend event)"; + } +} + /** * suspend_device - Save state of one device. @@ -57,7 +66,13 @@ int suspend_device(struct device * dev, pm_message_t state) dev->power.prev_state = dev->power.power_state; if (dev->bus && dev->bus->suspend && !dev->power.power_state.event) { - dev_dbg(dev, "suspending\n"); + dev_dbg(dev, "%s%s\n", + suspend_verb(state.event), + ((state.event == PM_EVENT_SUSPEND) + && device_may_wakeup(dev)) + ? ", may wakeup" + : "" + ); error = dev->bus->suspend(dev, state); suspend_report_result(dev->bus->suspend, error); } diff --git a/drivers/base/sys.c b/drivers/base/sys.c index 6fc23ab127b..6858178b3af 100644 --- a/drivers/base/sys.c +++ b/drivers/base/sys.c @@ -80,10 +80,59 @@ void sysdev_remove_file(struct sys_device * s, struct sysdev_attribute * a) EXPORT_SYMBOL_GPL(sysdev_create_file); EXPORT_SYMBOL_GPL(sysdev_remove_file); +#define to_sysdev_class(k) container_of(k, struct sysdev_class, kset.kobj) +#define to_sysdev_class_attr(a) container_of(a, \ + struct sysdev_class_attribute, attr) + +static ssize_t sysdev_class_show(struct kobject *kobj, struct attribute *attr, + char *buffer) +{ + struct sysdev_class * class = to_sysdev_class(kobj); + struct sysdev_class_attribute *class_attr = to_sysdev_class_attr(attr); + + if (class_attr->show) + return class_attr->show(class, buffer); + return -EIO; +} + +static ssize_t sysdev_class_store(struct kobject *kobj, struct attribute *attr, + const char *buffer, size_t count) +{ + struct sysdev_class * class = to_sysdev_class(kobj); + struct sysdev_class_attribute * class_attr = to_sysdev_class_attr(attr); + + if (class_attr->store) + return class_attr->store(class, buffer, count); + return -EIO; +} + +static struct sysfs_ops sysfs_class_ops = { + .show = sysdev_class_show, + .store = sysdev_class_store, +}; + +static struct kobj_type ktype_sysdev_class = { + .sysfs_ops = &sysfs_class_ops, +}; + +int sysdev_class_create_file(struct sysdev_class *c, + struct sysdev_class_attribute *a) +{ + return sysfs_create_file(&c->kset.kobj, &a->attr); +} +EXPORT_SYMBOL_GPL(sysdev_class_create_file); + +void sysdev_class_remove_file(struct sysdev_class *c, + struct sysdev_class_attribute *a) +{ + sysfs_remove_file(&c->kset.kobj, &a->attr); +} +EXPORT_SYMBOL_GPL(sysdev_class_remove_file); + /* * declare system_subsys */ -static decl_subsys(system, &ktype_sysdev, NULL); +static decl_subsys(system, &ktype_sysdev_class, NULL); int sysdev_class_register(struct sysdev_class * cls) { |