#ifndef QDEV_H #define QDEV_H #include "hw.h" #include "qemu-queue.h" #include "qemu-char.h" #include "qemu-option.h" #include "qapi/qapi-visit-core.h" #include "qemu/object.h" typedef struct Property Property; typedef struct PropertyInfo PropertyInfo; typedef struct CompatProperty CompatProperty; typedef struct DeviceInfo DeviceInfo; typedef struct BusState BusState; typedef struct BusInfo BusInfo; enum DevState { DEV_STATE_CREATED = 1, DEV_STATE_INITIALIZED, }; enum { DEV_NVECTORS_UNSPECIFIED = -1, }; /** * @DevicePropertyAccessor - called when trying to get/set a property * * @dev the device that owns the property * @v the visitor that contains the property data * @opaque the device property opaque * @name the name of the property * @errp a pointer to an Error that is filled if getting/setting fails. */ typedef void (DevicePropertyAccessor)(DeviceState *dev, Visitor *v, void *opaque, const char *name, Error **errp); /** * @DevicePropertyRelease - called when a property is removed from a device * * @dev the device that owns the property * @name the name of the property * @opaque the opaque registered with the property */ typedef void (DevicePropertyRelease)(DeviceState *dev, const char *name, void *opaque); typedef struct DeviceProperty { gchar *name; gchar *type; DevicePropertyAccessor *get; DevicePropertyAccessor *set; DevicePropertyRelease *release; void *opaque; QTAILQ_ENTRY(DeviceProperty) node; } DeviceProperty; #define TYPE_DEVICE "device" #define DEVICE(obj) OBJECT_CHECK(DeviceState, (obj), TYPE_DEVICE) #define DEVICE_CLASS(klass) OBJECT_CLASS_CHECK(DeviceClass, (klass), TYPE_DEVICE) #define DEVICE_GET_CLASS(obj) OBJECT_GET_CLASS(DeviceClass, (obj), TYPE_DEVICE) typedef struct DeviceClass { ObjectClass parent_class; DeviceInfo *info; void (*reset)(DeviceState *dev); } DeviceClass; /* This structure should not be accessed directly. We declare it here so that it can be embedded in individual device state structures. */ struct DeviceState { Object parent_obj; const char *id; enum DevState state; QemuOpts *opts; int hotplugged; BusState *parent_bus; int num_gpio_out; qemu_irq *gpio_out; int num_gpio_in; qemu_irq *gpio_in; QLIST_HEAD(, BusState) child_bus; int num_child_bus; QTAILQ_ENTRY(DeviceState) sibling; int instance_id_alias; int alias_required_for_version; /** * This tracks the number of references between devices. See @qdev_ref for * more information. */ uint32_t ref; QTAILQ_HEAD(, DeviceProperty) properties; /* Do not, under any circumstance, use this parent link below anywhere * outside of qdev.c. You have been warned. */ DeviceState *parent; }; typedef void (*bus_dev_printfn)(Monitor *mon, DeviceState *dev, int indent); typedef char *(*bus_get_dev_path)(DeviceState *dev); /* * This callback is used to create Open Firmware device path in accordance with * OF spec http://forthworks.com/standards/of1275.pdf. Indicidual bus bindings * can be found here http://playground.sun.com/1275/bindings/. */ typedef char *(*bus_get_fw_dev_path)(DeviceState *dev); typedef int (qbus_resetfn)(BusState *bus); struct BusInfo { const char *name; size_t size; bus_dev_printfn print_dev; bus_get_dev_path get_dev_path; bus_get_fw_dev_path get_fw_dev_path; qbus_resetfn *reset; Property *props; }; struct BusState { DeviceState *parent; BusInfo *info; const char *name; int allow_hotplug; int qdev_allocated; QTAILQ_HEAD(ChildrenHead, DeviceState) children; QLIST_ENTRY(BusState) sibling; }; struct Property { const char *name; PropertyInfo *info; int offset; int bitnr; void *defval; }; enum PropertyType { PROP_TYPE_UNSPEC = 0, PROP_TYPE_UINT8, PROP_TYPE_UINT16, PROP_TYPE_UINT32, PROP_TYPE_INT32, PROP_TYPE_UINT64, PROP_TYPE_TADDR, PROP_TYPE_MACADDR, PROP_TYPE_LOSTTICKPOLICY, PROP_TYPE_DRIVE, PROP_TYPE_CHR, PROP_TYPE_STRING, PROP_TYPE_NETDEV, PROP_TYPE_VLAN, PROP_TYPE_PTR, PROP_TYPE_BIT, }; struct PropertyInfo { const char *name; const char *legacy_name; size_t size; enum PropertyType type; int64_t min; int64_t max; int (*parse)(DeviceState *dev, Property *prop, const char *str); int (*print)(DeviceState *dev, Property *prop, char *dest, size_t len); void (*free)(DeviceState *dev, Property *prop); DevicePropertyAccessor *get; DevicePropertyAccessor *set; }; typedef struct GlobalProperty { const char *driver; const char *property; const char *value; QTAILQ_ENTRY(GlobalProperty) next; } GlobalProperty; /*** Board API. This should go away once we have a machine config file. ***/ DeviceState *qdev_create(BusState *bus, const char *name); DeviceState *qdev_try_create(BusState *bus, const char *name); bool qdev_exists(const char *name); int qdev_device_help(QemuOpts *opts); DeviceState *qdev_device_add(QemuOpts *opts); int qdev_init(DeviceState *dev) QEMU_WARN_UNUSED_RESULT; void qdev_init_nofail(DeviceState *dev); void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id, int required_for_version); int qdev_unplug(DeviceState *dev); void qdev_free(DeviceState *dev); int qdev_simple_unplug_cb(DeviceState *dev); void qdev_machine_creation_done(void); bool qdev_machine_modified(void); qemu_irq qdev_get_gpio_in(DeviceState *dev, int n); void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin); BusState *qdev_get_child_bus(DeviceState *dev, const char *name); /*** Device API. ***/ typedef int (*qdev_initfn)(DeviceState *dev, DeviceInfo *info); typedef int (*qdev_event)(DeviceState *dev); typedef void (*qdev_resetfn)(DeviceState *dev); struct DeviceInfo { const char *name; const char *fw_name; const char *alias; const char *desc; size_t size; Property *props; int no_user; /* callbacks */ qdev_resetfn reset; /* device state */ const VMStateDescription *vmsd; /** * See #TypeInfo::class_init() */ void (*class_init)(ObjectClass *klass, void *data); /* Private to qdev / bus. */ qdev_initfn init; qdev_event unplug; qdev_event exit; BusInfo *bus_info; struct DeviceInfo *next; }; extern DeviceInfo *device_info_list; void qdev_register(DeviceInfo *info); void qdev_register_subclass(DeviceInfo *info, const char *parent); /* Register device properties. */ /* GPIO inputs also double as IRQ sinks. */ void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n); void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n); CharDriverState *qdev_init_chardev(DeviceState *dev); BusState *qdev_get_parent_bus(DeviceState *dev); /*** BUS API. ***/ DeviceState *qdev_find_recursive(BusState *bus, const char *id); /* Returns 0 to walk children, > 0 to skip walk, < 0 to terminate walk. */ typedef int (qbus_walkerfn)(BusState *bus, void *opaque); typedef int (qdev_walkerfn)(DeviceState *dev, void *opaque); void qbus_create_inplace(BusState *bus, BusInfo *info, DeviceState *parent, const char *name); BusState *qbus_create(BusInfo *info, DeviceState *parent, const char *name); /* Returns > 0 if either devfn or busfn skip walk somewhere in cursion, * < 0 if either devfn or busfn terminate walk somewhere in cursion, * 0 otherwise. */ int qbus_walk_children(BusState *bus, qdev_walkerfn *devfn, qbus_walkerfn *busfn, void *opaque); int qdev_walk_children(DeviceState *dev, qdev_walkerfn *devfn, qbus_walkerfn *busfn, void *opaque); void qdev_reset_all(DeviceState *dev); void qbus_reset_all_fn(void *opaque); void qbus_free(BusState *bus); #define FROM_QBUS(type, dev) DO_UPCAST(type, qbus, dev) /* This should go away once we get rid of the NULL bus hack */ BusState *sysbus_get_default(void); /*** monitor commands ***/ void do_info_qtree(Monitor *mon); void do_info_qdm(Monitor *mon); int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data); int do_device_del(Monitor *mon, const QDict *qdict, QObject **ret_data); /*** qdev-properties.c ***/ extern PropertyInfo qdev_prop_bit; extern PropertyInfo qdev_prop_uint8; extern PropertyInfo qdev_prop_uint16; extern PropertyInfo qdev_prop_uint32; extern PropertyInfo qdev_prop_int32; extern PropertyInfo qdev_prop_uint64; extern PropertyInfo qdev_prop_hex8; extern PropertyInfo qdev_prop_hex32; extern PropertyInfo qdev_prop_hex64; extern PropertyInfo qdev_prop_string; extern PropertyInfo qdev_prop_chr; extern PropertyInfo qdev_prop_ptr; extern PropertyInfo qdev_prop_macaddr; extern PropertyInfo qdev_prop_losttickpolicy; extern PropertyInfo qdev_prop_drive; extern PropertyInfo qdev_prop_netdev; extern PropertyInfo qdev_prop_vlan; extern PropertyInfo qdev_prop_pci_devfn; #define DEFINE_PROP(_name, _state, _field, _prop, _type) { \ .name = (_name), \ .info = &(_prop), \ .offset = offsetof(_state, _field) \ + type_check(_type,typeof_field(_state, _field)), \ } #define DEFINE_PROP_DEFAULT(_name, _state, _field, _defval, _prop, _type) { \ .name = (_name), \ .info = &(_prop), \ .offset = offsetof(_state, _field) \ + type_check(_type,typeof_field(_state, _field)), \ .defval = (_type[]) { _defval }, \ } #define DEFINE_PROP_BIT(_name, _state, _field, _bit, _defval) { \ .name = (_name), \ .info = &(qdev_prop_bit), \ .bitnr = (_bit), \ .offset = offsetof(_state, _field) \ + type_check(uint32_t,typeof_field(_state, _field)), \ .defval = (bool[]) { (_defval) }, \ } #define DEFINE_PROP_UINT8(_n, _s, _f, _d) \ DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint8, uint8_t) #define DEFINE_PROP_UINT16(_n, _s, _f, _d) \ DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint16, uint16_t) #define DEFINE_PROP_UINT32(_n, _s, _f, _d) \ DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint32, uint32_t) #define DEFINE_PROP_INT32(_n, _s, _f, _d) \ DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_int32, int32_t) #define DEFINE_PROP_UINT64(_n, _s, _f, _d) \ DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint64, uint64_t) #define DEFINE_PROP_HEX8(_n, _s, _f, _d) \ DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex8, uint8_t) #define DEFINE_PROP_HEX32(_n, _s, _f, _d) \ DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex32, uint32_t) #define DEFINE_PROP_HEX64(_n, _s, _f, _d) \ DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex64, uint64_t) #define DEFINE_PROP_PCI_DEVFN(_n, _s, _f, _d) \ DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_pci_devfn, uint32_t) #define DEFINE_PROP_PTR(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, qdev_prop_ptr, void*) #define DEFINE_PROP_CHR(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, qdev_prop_chr, CharDriverState*) #define DEFINE_PROP_STRING(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, qdev_prop_string, char*) #define DEFINE_PROP_NETDEV(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, qdev_prop_netdev, VLANClientState*) #define DEFINE_PROP_VLAN(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, qdev_prop_vlan, VLANState*) #define DEFINE_PROP_DRIVE(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, qdev_prop_drive, BlockDriverState *) #define DEFINE_PROP_MACADDR(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, qdev_prop_macaddr, MACAddr) #define DEFINE_PROP_LOSTTICKPOLICY(_n, _s, _f, _d) \ DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_losttickpolicy, \ LostTickPolicy) #define DEFINE_PROP_END_OF_LIST() \ {} /* Set properties between creation and init. */ void *qdev_get_prop_ptr(DeviceState *dev, Property *prop); int qdev_prop_exists(DeviceState *dev, const char *name); int qdev_prop_parse(DeviceState *dev, const char *name, const char *value); void qdev_prop_set(DeviceState *dev, const char *name, void *src, enum PropertyType type); void qdev_prop_set_bit(DeviceState *dev, const char *name, bool value); void qdev_prop_set_uint8(DeviceState *dev, const char *name, uint8_t value); void qdev_prop_set_uint16(DeviceState *dev, const char *name, uint16_t value); void qdev_prop_set_uint32(DeviceState *dev, const char *name, uint32_t value); void qdev_prop_set_int32(DeviceState *dev, const char *name, int32_t value); void qdev_prop_set_uint64(DeviceState *dev, const char *name, uint64_t value); void qdev_prop_set_string(DeviceState *dev, const char *name, char *value); void qdev_prop_set_chr(DeviceState *dev, const char *name, CharDriverState *value); void qdev_prop_set_netdev(DeviceState *dev, const char *name, VLANClientState *value); void qdev_prop_set_vlan(DeviceState *dev, const char *name, VLANState *value); int qdev_prop_set_drive(DeviceState *dev, const char *name, BlockDriverState *value) QEMU_WARN_UNUSED_RESULT; void qdev_prop_set_drive_nofail(DeviceState *dev, const char *name, BlockDriverState *value); void qdev_prop_set_macaddr(DeviceState *dev, const char *name, uint8_t *value); void qdev_prop_set_losttickpolicy(DeviceState *dev, const char *name, LostTickPolicy *value); /* FIXME: Remove opaque pointer properties. */ void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value); void qdev_prop_set_defaults(DeviceState *dev, Property *props); void qdev_prop_register_global_list(GlobalProperty *props); void qdev_prop_set_globals(DeviceState *dev); void error_set_from_qdev_prop_error(Error **errp, int ret, DeviceState *dev, Property *prop, const char *value); DeviceInfo *qdev_get_info(DeviceState *dev); static inline const char *qdev_fw_name(DeviceState *dev) { DeviceInfo *info = qdev_get_info(dev); if (info->fw_name) { return info->fw_name; } else if (info->alias) { return info->alias; } return object_get_typename(OBJECT(dev)); } char *qdev_get_fw_dev_path(DeviceState *dev); /* This is a nasty hack to allow passing a NULL bus to qdev_create. */ extern struct BusInfo system_bus_info; /** * @qdev_ref * * Increase the reference count of a device. A device cannot be freed as long * as its reference count is greater than zero. * * @dev - the device */ void qdev_ref(DeviceState *dev); /** * @qdef_unref * * Decrease the reference count of a device. A device cannot be freed as long * as its reference count is greater than zero. * * @dev - the device */ void qdev_unref(DeviceState *dev); /** * @qdev_property_add - add a new property to a device * * @dev - the device to add a property to * * @name - the name of the property. This can contain any character except for * a forward slash. In general, you should use hyphens '-' instead of * underscores '_' when naming properties. * * @type - the type name of the property. This namespace is pretty loosely * defined. Sub namespaces are constructed by using a prefix and then * to angle brackets. For instance, the type 'virtio-net-pci' in the * 'link' namespace would be 'link'. * * @get - the getter to be called to read a property. If this is NULL, then * the property cannot be read. * * @set - the setter to be called to write a property. If this is NULL, * then the property cannot be written. * * @release - called when the property is removed from the device. This is * meant to allow a property to free its opaque upon device * destruction. This may be NULL. * * @opaque - an opaque pointer to pass to the callbacks for the property * * @errp - returns an error if this function fails */ void qdev_property_add(DeviceState *dev, const char *name, const char *type, DevicePropertyAccessor *get, DevicePropertyAccessor *set, DevicePropertyRelease *release, void *opaque, Error **errp); /** * @qdev_property_get - reads a property from a device * * @dev - the device * * @v - the visitor that will receive the property value. This should be an * Output visitor and the data will be written with @name as the name. * * @name - the name of the property * * @errp - returns an error if this function fails */ void qdev_property_get(DeviceState *dev, Visitor *v, const char *name, Error **errp); /** * @qdev_property_set - writes a property to a device * * @dev - the device * * @v - the visitor that will be used to write the property value. This should * be an Input visitor and the data will be first read with @name as the * name and then written as the property value. * * @name - the name of the property * * @errp - returns an error if this function fails */ void qdev_property_set(DeviceState *dev, Visitor *v, const char *name, Error **errp); /** * @qdev_property_get_type - returns the type of a property * * @dev - the device * * @name - the name of the property * * @errp - returns an error if this function fails * * Returns: * The type name of the property. */ const char *qdev_property_get_type(DeviceState *dev, const char *name, Error **errp); /** * @qdev_property_add_static - add a @Property to a device referencing a * field in a struct. */ void qdev_property_add_static(DeviceState *dev, Property *prop, Error **errp); /** * @qdev_get_root - returns the root device of the composition tree * * Returns: * The root of the composition tree. */ DeviceState *qdev_get_root(void); /** * @qdev_get_canonical_path - returns the canonical path for a device. This * is the path within the composition tree starting from the root. * * Returns: * The canonical path in the composition tree. */ gchar *qdev_get_canonical_path(DeviceState *dev); /** * @qdev_resolve_path - resolves a path returning a device * * There are two types of supported paths--absolute paths and partial paths. * * Absolute paths are derived from the root device and can follow child<> or * link<> properties. Since they can follow link<> properties, they can be * arbitrarily long. Absolute paths look like absolute filenames and are * prefixed with a leading slash. * * Partial paths look like relative filenames. They do not begin with a * prefix. The matching rules for partial paths are subtle but designed to make * specifying devices easy. At each level of the composition tree, the partial * path is matched as an absolute path. The first match is not returned. At * least two matches are searched for. A successful result is only returned if * only one match is founded. If more than one match is found, a flag is * return to indicate that the match was ambiguous. * * @path - the path to resolve * * @ambiguous - returns true if the path resolution failed because of an * ambiguous match * * Returns: * The matched device or NULL on path lookup failure. */ DeviceState *qdev_resolve_path(const char *path, bool *ambiguous); /** * @qdev_property_add_child - Add a child property to a device * * Child properties form the composition tree. All devices need to be a child * of another device. Devices can only be a child of one device. * * There is no way for a child to determine what its parent is. It is not * a bidirectional relationship. This is by design. * * @dev - the device to add a property to * * @name - the name of the property * * @child - the child device * * @errp - if an error occurs, a pointer to an area to store the area */ void qdev_property_add_child(DeviceState *dev, const char *name, DeviceState *child, Error **errp); /** * @qdev_property_add_link - Add a link property to a device * * Links establish relationships between devices. Links are unidirectional * although two links can be combined to form a bidirectional relationship * between devices. * * Links form the graph in the device model. * * @dev - the device to add a property to * * @name - the name of the property * * @type - the qdev type of the link * * @child - a pointer to where the link device reference is stored * * @errp - if an error occurs, a pointer to an area to store the area */ void qdev_property_add_link(DeviceState *dev, const char *name, const char *type, DeviceState **child, Error **errp); /** * @qdev_property_add_str * * Add a string property using getters/setters. This function will add a * property of type 'string'. * * @dev - the device to add a property to * * @name - the name of the property * * @get - the getter or NULL if the property is write-only. This function must * return a string to be freed by @g_free(). * * @set - the setter or NULL if the property is read-only * * @errp - if an error occurs, a pointer to an area to store the error */ void qdev_property_add_str(DeviceState *dev, const char *name, char *(*get)(DeviceState *, Error **), void (*set)(DeviceState *, const char *, Error **), Error **errp); /** * @qdev_get_type * * Returns the string representation of the type of this object. * * @dev - the device * * @errp - if an error occurs, a pointer to an area to store the error * * Returns: a string representing the type. This must be freed by the caller * with g_free(). */ char *qdev_get_type(DeviceState *dev, Error **errp); /** * @qdev_machine_init * * Initialize platform devices before machine init. This is a hack until full * support for composition is added. */ void qdev_machine_init(void); /** * @device_reset * * Reset a single device (by calling the reset method). */ void device_reset(DeviceState *dev); #endif