X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Flinux%2Fdevice.h;h=f44247fe8135b861b46ac24cacc83a230e874eec;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=49d3865aa27b3ac1721e858aba569ee74a55bb38;hpb=9bf4aaab3e101692164d49b7ca357651eb691cb6;p=linux-2.6.git diff --git a/include/linux/device.h b/include/linux/device.h index 49d3865aa..f44247fe8 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -11,16 +11,17 @@ #ifndef _DEVICE_H_ #define _DEVICE_H_ -#include #include #include +#include #include -#include +#include #include #include #include #include #include +#include #define DEVICE_NAME_SIZE 50 #define DEVICE_NAME_HALF __stringify(20) /* Less than half to accommodate slop */ @@ -28,62 +29,77 @@ #define BUS_ID_SIZE KOBJ_NAME_LEN -enum { - SUSPEND_NOTIFY, - SUSPEND_SAVE_STATE, - SUSPEND_DISABLE, - SUSPEND_POWER_DOWN, -}; - -enum { - RESUME_POWER_ON, - RESUME_RESTORE_STATE, - RESUME_ENABLE, -}; - struct device; struct device_driver; struct class; struct class_device; -struct class_simple; struct bus_type { - char * name; + const char * name; struct subsystem subsys; struct kset drivers; struct kset devices; + struct klist klist_devices; + struct klist klist_drivers; + + struct blocking_notifier_head bus_notifier; struct bus_attribute * bus_attrs; struct device_attribute * dev_attrs; struct driver_attribute * drv_attrs; int (*match)(struct device * dev, struct device_driver * drv); - struct device * (*add) (struct device * parent, char * bus_id); - int (*hotplug) (struct device *dev, char **envp, - int num_envp, char *buffer, int buffer_size); - int (*suspend)(struct device * dev, u32 state); - int (*resume)(struct device * dev); + int (*uevent)(struct device *dev, char **envp, + int num_envp, char *buffer, int buffer_size); + int (*probe)(struct device * dev); + int (*remove)(struct device * dev); + void (*shutdown)(struct device * dev); + + int (*suspend)(struct device * dev, pm_message_t state); + int (*suspend_late)(struct device * dev, pm_message_t state); + int (*resume_early)(struct device * dev); + int (*resume)(struct device * dev); }; -extern int bus_register(struct bus_type * bus); +extern int __must_check bus_register(struct bus_type * bus); extern void bus_unregister(struct bus_type * bus); -extern int bus_rescan_devices(struct bus_type * bus); - -extern struct bus_type * get_bus(struct bus_type * bus); -extern void put_bus(struct bus_type * bus); - -extern struct bus_type * find_bus(char * name); +extern int __must_check bus_rescan_devices(struct bus_type * bus); /* iterator helpers for buses */ int bus_for_each_dev(struct bus_type * bus, struct device * start, void * data, int (*fn)(struct device *, void *)); +struct device * bus_find_device(struct bus_type *bus, struct device *start, + void *data, int (*match)(struct device *, void *)); + +int __must_check bus_for_each_drv(struct bus_type *bus, + struct device_driver *start, void *data, + int (*fn)(struct device_driver *, void *)); + +/* + * Bus notifiers: Get notified of addition/removal of devices + * and binding/unbinding of drivers to devices. + * In the long run, it should be a replacement for the platform + * notify hooks. + */ +struct notifier_block; -int bus_for_each_drv(struct bus_type * bus, struct device_driver * start, - void * data, int (*fn)(struct device_driver *, void *)); +extern int bus_register_notifier(struct bus_type *bus, + struct notifier_block *nb); +extern int bus_unregister_notifier(struct bus_type *bus, + struct notifier_block *nb); +/* All 4 notifers below get called with the target struct device * + * as an argument. Note that those functions are likely to be called + * with the device semaphore held in the core, so be careful. + */ +#define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ +#define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ +#define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */ +#define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be + unbound */ /* driverfs interface for exporting bus attributes */ @@ -96,32 +112,38 @@ struct bus_attribute { #define BUS_ATTR(_name,_mode,_show,_store) \ struct bus_attribute bus_attr_##_name = __ATTR(_name,_mode,_show,_store) -extern int bus_create_file(struct bus_type *, struct bus_attribute *); +extern int __must_check bus_create_file(struct bus_type *, + struct bus_attribute *); extern void bus_remove_file(struct bus_type *, struct bus_attribute *); struct device_driver { - char * name; + const char * name; struct bus_type * bus; - struct semaphore unload_sem; + struct completion unloaded; struct kobject kobj; - struct list_head devices; + struct klist klist_devices; + struct klist_node knode_bus; + + struct module * owner; int (*probe) (struct device * dev); - int (*remove) (struct device * dev); + int (*remove) (struct device * dev); void (*shutdown) (struct device * dev); - int (*suspend) (struct device * dev, u32 state, u32 level); - int (*resume) (struct device * dev, u32 level); + int (*suspend) (struct device * dev, pm_message_t state); + int (*resume) (struct device * dev); + + unsigned int multithread_probe:1; }; -extern int driver_register(struct device_driver * drv); +extern int __must_check driver_register(struct device_driver * drv); extern void driver_unregister(struct device_driver * drv); extern struct device_driver * get_driver(struct device_driver * drv); extern void put_driver(struct device_driver * drv); extern struct device_driver *driver_find(const char *name, struct bus_type *bus); - +extern int driver_probe_done(void); /* driverfs interface for exporting driver attributes */ @@ -134,36 +156,52 @@ struct driver_attribute { #define DRIVER_ATTR(_name,_mode,_show,_store) \ struct driver_attribute driver_attr_##_name = __ATTR(_name,_mode,_show,_store) -extern int driver_create_file(struct device_driver *, struct driver_attribute *); +extern int __must_check driver_create_file(struct device_driver *, + struct driver_attribute *); extern void driver_remove_file(struct device_driver *, struct driver_attribute *); +extern int __must_check driver_for_each_device(struct device_driver * drv, + struct device *start, void *data, + int (*fn)(struct device *, void *)); +struct device * driver_find_device(struct device_driver *drv, + struct device *start, void *data, + int (*match)(struct device *, void *)); /* * device classes */ struct class { - char * name; + const char * name; + struct module * owner; struct subsystem subsys; struct list_head children; + struct list_head devices; struct list_head interfaces; + struct semaphore sem; /* locks both the children and interfaces lists */ + + struct kobject *virtual_dir; struct class_attribute * class_attrs; struct class_device_attribute * class_dev_attrs; + struct device_attribute * dev_attrs; - int (*hotplug)(struct class_device *dev, char **envp, + int (*uevent)(struct class_device *dev, char **envp, int num_envp, char *buffer, int buffer_size); + int (*dev_uevent)(struct device *dev, char **envp, int num_envp, + char *buffer, int buffer_size); void (*release)(struct class_device *dev); void (*class_release)(struct class *class); + void (*dev_release)(struct device *dev); + + int (*suspend)(struct device *, pm_message_t state); + int (*resume)(struct device *); }; -extern int class_register(struct class *); +extern int __must_check class_register(struct class *); extern void class_unregister(struct class *); -extern struct class * class_get(struct class *); -extern void class_put(struct class *); - struct class_attribute { struct attribute attr; @@ -174,18 +212,64 @@ struct class_attribute { #define CLASS_ATTR(_name,_mode,_show,_store) \ struct class_attribute class_attr_##_name = __ATTR(_name,_mode,_show,_store) -extern int class_create_file(struct class *, const struct class_attribute *); +extern int __must_check class_create_file(struct class *, + const struct class_attribute *); extern void class_remove_file(struct class *, const struct class_attribute *); +struct class_device_attribute { + struct attribute attr; + ssize_t (*show)(struct class_device *, char * buf); + ssize_t (*store)(struct class_device *, const char * buf, size_t count); +}; + +#define CLASS_DEVICE_ATTR(_name,_mode,_show,_store) \ +struct class_device_attribute class_device_attr_##_name = \ + __ATTR(_name,_mode,_show,_store) + +extern int __must_check class_device_create_file(struct class_device *, + const struct class_device_attribute *); +/** + * struct class_device - class devices + * @class: pointer to the parent class for this class device. This is required. + * @devt: for internal use by the driver core only. + * @node: for internal use by the driver core only. + * @kobj: for internal use by the driver core only. + * @devt_attr: for internal use by the driver core only. + * @groups: optional additional groups to be created + * @dev: if set, a symlink to the struct device is created in the sysfs + * directory for this struct class device. + * @class_data: pointer to whatever you want to store here for this struct + * class_device. Use class_get_devdata() and class_set_devdata() to get and + * set this pointer. + * @parent: pointer to a struct class_device that is the parent of this struct + * class_device. If NULL, this class_device will show up at the root of the + * struct class in sysfs (which is probably what you want to have happen.) + * @release: pointer to a release function for this struct class_device. If + * set, this will be called instead of the class specific release function. + * Only use this if you want to override the default release function, like + * when you are nesting class_device structures. + * @uevent: pointer to a uevent function for this struct class_device. If + * set, this will be called instead of the class specific uevent function. + * Only use this if you want to override the default uevent function, like + * when you are nesting class_device structures. + */ struct class_device { struct list_head node; struct kobject kobj; struct class * class; /* required */ + dev_t devt; /* dev_t, creates the sysfs "dev" */ + struct class_device_attribute *devt_attr; + struct class_device_attribute uevent_attr; struct device * dev; /* not necessary, but nice to have */ void * class_data; /* class-specific data */ + struct class_device *parent; /* parent of this child device, if there is one */ + struct attribute_group ** groups; /* optional groups */ + void (*release)(struct class_device *dev); + int (*uevent)(struct class_device *dev, char **envp, + int num_envp, char *buffer, int buffer_size); char class_id[BUS_ID_SIZE]; /* unique to this class */ }; @@ -202,10 +286,10 @@ class_set_devdata (struct class_device *dev, void *data) } -extern int class_device_register(struct class_device *); +extern int __must_check class_device_register(struct class_device *); extern void class_device_unregister(struct class_device *); extern void class_device_initialize(struct class_device *); -extern int class_device_add(struct class_device *); +extern int __must_check class_device_add(struct class_device *); extern void class_device_del(struct class_device *); extern int class_device_rename(struct class_device *, char *); @@ -213,69 +297,83 @@ extern int class_device_rename(struct class_device *, char *); extern struct class_device * class_device_get(struct class_device *); extern void class_device_put(struct class_device *); -struct class_device_attribute { - struct attribute attr; - ssize_t (*show)(struct class_device *, char * buf); - ssize_t (*store)(struct class_device *, const char * buf, size_t count); -}; - -#define CLASS_DEVICE_ATTR(_name,_mode,_show,_store) \ -struct class_device_attribute class_device_attr_##_name = \ - __ATTR(_name,_mode,_show,_store) - -extern int class_device_create_file(struct class_device *, - const struct class_device_attribute *); extern void class_device_remove_file(struct class_device *, const struct class_device_attribute *); - +extern int __must_check class_device_create_bin_file(struct class_device *, + struct bin_attribute *); +extern void class_device_remove_bin_file(struct class_device *, + struct bin_attribute *); struct class_interface { struct list_head node; struct class *class; - int (*add) (struct class_device *); - void (*remove) (struct class_device *); + int (*add) (struct class_device *, struct class_interface *); + void (*remove) (struct class_device *, struct class_interface *); + int (*add_dev) (struct device *, struct class_interface *); + void (*remove_dev) (struct device *, struct class_interface *); }; -extern int class_interface_register(struct class_interface *); +extern int __must_check class_interface_register(struct class_interface *); extern void class_interface_unregister(struct class_interface *); -/* interface for class simple stuff */ -extern struct class_simple *class_simple_create(struct module *owner, char *name); -extern void class_simple_destroy(struct class_simple *cs); -extern struct class_device *class_simple_device_add(struct class_simple *cs, dev_t dev, struct device *device, const char *fmt, ...) - __attribute__((format(printf,4,5))); -extern int class_simple_set_hotplug(struct class_simple *, - int (*hotplug)(struct class_device *dev, char **envp, int num_envp, char *buffer, int buffer_size)); -extern void class_simple_device_remove(dev_t dev); +extern struct class *class_create(struct module *owner, const char *name); +extern void class_destroy(struct class *cls); +extern struct class_device *class_device_create(struct class *cls, + struct class_device *parent, + dev_t devt, + struct device *device, + const char *fmt, ...) + __attribute__((format(printf,5,6))); +extern void class_device_destroy(struct class *cls, dev_t devt); + +/* interface for exporting device attributes */ +struct device_attribute { + struct attribute attr; + ssize_t (*show)(struct device *dev, struct device_attribute *attr, + char *buf); + ssize_t (*store)(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count); +}; +#define DEVICE_ATTR(_name,_mode,_show,_store) \ +struct device_attribute dev_attr_##_name = __ATTR(_name,_mode,_show,_store) +extern int __must_check device_create_file(struct device *device, + struct device_attribute * entry); +extern void device_remove_file(struct device * dev, struct device_attribute * attr); +extern int __must_check device_create_bin_file(struct device *dev, + struct bin_attribute *attr); +extern void device_remove_bin_file(struct device *dev, + struct bin_attribute *attr); struct device { - struct list_head node; /* node in sibling list */ - struct list_head bus_list; /* node in bus's list */ - struct list_head driver_list; - struct list_head children; + struct klist klist_children; + struct klist_node knode_parent; /* node in sibling list */ + struct klist_node knode_driver; + struct klist_node knode_bus; struct device * parent; struct kobject kobj; char bus_id[BUS_ID_SIZE]; /* position on parent bus */ + unsigned is_registered:1; + struct device_attribute uevent_attr; + struct device_attribute *devt_attr; + + struct semaphore sem; /* semaphore to synchronize calls to + * its driver. + */ struct bus_type * bus; /* type of bus device is on */ struct device_driver *driver; /* which driver has allocated this device */ void *driver_data; /* data private to the driver */ - void *platform_data; /* Platform specific data (e.g. ACPI, - BIOS data relevant to device) */ + void *platform_data; /* Platform specific data, device + core doesn't touch it */ struct dev_pm_info power; - u32 power_state; /* Current operating state. In - ACPI-speak, this is D0-D3, D0 - being fully functional, and D3 - being off. */ - - unsigned char *saved_state; /* saved device state */ - u32 detach_state; /* State to enter when device is - detached from its driver. */ +#ifdef CONFIG_NUMA + int numa_node; /* NUMA node this device is close to */ +#endif u64 *dma_mask; /* dma mask (if dma'able device) */ u64 coherent_dma_mask;/* Like dma_mask, but for alloc_coherent mappings as @@ -285,14 +383,38 @@ struct device { struct list_head dma_pools; /* dma pools (if dma'ble) */ + struct dma_coherent_mem *dma_mem; /* internal for coherent mem + override */ + /* arch specific additions */ + struct dev_archdata archdata; + + /* class_device migration path */ + struct list_head node; + struct class *class; /* optional*/ + dev_t devt; /* dev_t, creates the sysfs "dev" */ + struct attribute_group **groups; /* optional groups */ + void (*release)(struct device * dev); }; -static inline struct device * -list_to_dev(struct list_head *node) +#ifdef CONFIG_NUMA +static inline int dev_to_node(struct device *dev) +{ + return dev->numa_node; +} +static inline void set_dev_node(struct device *dev, int node) +{ + dev->numa_node = node; +} +#else +static inline int dev_to_node(struct device *dev) { - return list_entry(node, struct device, node); + return -1; } +static inline void set_dev_node(struct device *dev, int node) +{ +} +#endif static inline void * dev_get_drvdata (struct device *dev) @@ -306,40 +428,45 @@ dev_set_drvdata (struct device *dev, void *data) dev->driver_data = data; } +static inline int device_is_registered(struct device *dev) +{ + return dev->is_registered; +} + +void driver_init(void); + /* * High level routines for use by the bus drivers */ -extern int device_register(struct device * dev); +extern int __must_check device_register(struct device * dev); extern void device_unregister(struct device * dev); extern void device_initialize(struct device * dev); -extern int device_add(struct device * dev); +extern int __must_check device_add(struct device * dev); extern void device_del(struct device * dev); extern int device_for_each_child(struct device *, void *, int (*fn)(struct device *, void *)); +extern struct device *device_find_child(struct device *, void *data, + int (*match)(struct device *, void *)); +extern int device_rename(struct device *dev, char *new_name); +extern int device_move(struct device *dev, struct device *new_parent); /* - * Manual binding of a device to driver. See drivers/base/bus.c + * Manual binding of a device to driver. See drivers/base/bus.c * for information on use. */ -extern void device_bind_driver(struct device * dev); +extern int __must_check device_bind_driver(struct device *dev); extern void device_release_driver(struct device * dev); -extern void driver_attach(struct device_driver * drv); - - -/* driverfs interface for exporting device attributes */ - -struct device_attribute { - struct attribute attr; - ssize_t (*show)(struct device * dev, char * buf); - ssize_t (*store)(struct device * dev, const char * buf, size_t count); -}; - -#define DEVICE_ATTR(_name,_mode,_show,_store) \ -struct device_attribute dev_attr_##_name = __ATTR(_name,_mode,_show,_store) - +extern int __must_check device_attach(struct device * dev); +extern int __must_check driver_attach(struct device_driver *drv); +extern int __must_check device_reprobe(struct device *dev); -extern int device_create_file(struct device *device, struct device_attribute * entry); -extern void device_remove_file(struct device * dev, struct device_attribute * attr); +/* + * Easy functions for dynamically creating devices on the fly + */ +extern struct device *device_create(struct class *cls, struct device *parent, + dev_t devt, const char *fmt, ...) + __attribute__((format(printf,4,5))); +extern void device_destroy(struct class *cls, dev_t devt); /* * Platform "fixup" functions - allow the platform to have their say @@ -358,44 +485,20 @@ extern int (*platform_notify_remove)(struct device * dev); */ extern struct device * get_device(struct device * dev); extern void put_device(struct device * dev); -extern struct device *device_find(const char *name, struct bus_type *bus); - - -/* drivers/base/platform.c */ - -struct platform_device { - char * name; - u32 id; - struct device dev; - u32 num_resources; - struct resource * resource; -}; - -#define to_platform_device(x) container_of((x), struct platform_device, dev) - -extern int platform_device_register(struct platform_device *); -extern void platform_device_unregister(struct platform_device *); - -extern struct bus_type platform_bus_type; -extern struct device platform_bus; - -extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int); -extern int platform_get_irq(struct platform_device *, unsigned int); -extern int platform_add_devices(struct platform_device **, int); -extern struct platform_device *platform_device_register_simple(char *, unsigned int, struct resource *, unsigned int); -/* drivers/base/power.c */ +/* drivers/base/power/shutdown.c */ extern void device_shutdown(void); /* drivers/base/firmware.c */ -extern int firmware_register(struct subsystem *); +extern int __must_check firmware_register(struct subsystem *); extern void firmware_unregister(struct subsystem *); /* debugging and troubleshooting/diagnostic helpers. */ +extern const char *dev_driver_string(struct device *dev); #define dev_printk(level, dev, format, arg...) \ - printk(level "%s %s: " format , (dev)->driver ? (dev)->driver->name : "" , (dev)->bus_id , ## arg) + printk(level "%s %s: " format , dev_driver_string(dev) , (dev)->bus_id , ## arg) #ifdef DEBUG #define dev_dbg(dev, format, arg...) \ @@ -410,6 +513,8 @@ extern void firmware_unregister(struct subsystem *); dev_printk(KERN_INFO , dev , format , ## arg) #define dev_warn(dev, format, arg...) \ dev_printk(KERN_WARNING , dev , format , ## arg) +#define dev_notice(dev, format, arg...) \ + dev_printk(KERN_NOTICE , dev , format , ## arg) /* Create alias, so I can be autoloaded. */ #define MODULE_ALIAS_CHARDEV(major,minor) \