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qemu/hw/qdev.h

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#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<virtio-net-pci>'.
*
* @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
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