Archipelago » qemu

#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_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_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_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);

/* 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