#ifndef QDEV_CORE_H
#define QDEV_CORE_H
#include "qemu/queue.h"
#include "qemu/bitmap.h"
#include "qemu/rcu.h"
#include "qemu/rcu_queue.h"
#include "qom/object.h"
#include "hw/hotplug.h"
#include "hw/resettable.h"
enum {
DEV_NVECTORS_UNSPECIFIED = -1,
};
#define TYPE_DEVICE "device"
OBJECT_DECLARE_TYPE(DeviceState, DeviceClass, DEVICE)
typedef enum DeviceCategory {
DEVICE_CATEGORY_BRIDGE,
DEVICE_CATEGORY_USB,
DEVICE_CATEGORY_STORAGE,
DEVICE_CATEGORY_NETWORK,
DEVICE_CATEGORY_INPUT,
DEVICE_CATEGORY_DISPLAY,
DEVICE_CATEGORY_SOUND,
DEVICE_CATEGORY_MISC,
DEVICE_CATEGORY_CPU,
DEVICE_CATEGORY_WATCHDOG,
DEVICE_CATEGORY_MAX
} DeviceCategory;
typedef void (*DeviceRealize)(DeviceState *dev, Error **errp);
typedef void (*DeviceUnrealize)(DeviceState *dev);
typedef void (*DeviceReset)(DeviceState *dev);
typedef void (*BusRealize)(BusState *bus, Error **errp);
typedef void (*BusUnrealize)(BusState *bus);
/**
* DeviceClass:
* @props: Properties accessing state fields.
* @realize: Callback function invoked when the #DeviceState:realized
* property is changed to %true.
* @unrealize: Callback function invoked when the #DeviceState:realized
* property is changed to %false.
* @hotpluggable: indicates if #DeviceClass is hotpluggable, available
* as readonly "hotpluggable" property of #DeviceState instance
*
* # Realization #
* Devices are constructed in two stages,
* 1) object instantiation via object_initialize() and
* 2) device realization via #DeviceState:realized property.
* The former may not fail (and must not abort or exit, since it is called
* during device introspection already), and the latter may return error
* information to the caller and must be re-entrant.
* Trivial field initializations should go into #TypeInfo.instance_init.
* Operations depending on @props static properties should go into @realize.
* After successful realization, setting static properties will fail.
*
* As an interim step, the #DeviceState:realized property can also be
* set with qdev_realize().
* In the future, devices will propagate this state change to their children
* and along busses they expose.
* The point in time will be deferred to machine creation, so that values
* set in @realize will not be introspectable beforehand. Therefore devices
* must not create children during @realize; they should initialize them via
* object_initialize() in their own #TypeInfo.instance_init and forward the
* realization events appropriately.
*
* Any type may override the @realize and/or @unrealize callbacks but needs
* to call the parent type's implementation if keeping their functionality
* is desired. Refer to QOM documentation for further discussion and examples.
*
* <note>
* <para>
* Since TYPE_DEVICE doesn't implement @realize and @unrealize, types
* derived directly from it need not call their parent's @realize and
* @unrealize.
* For other types consult the documentation and implementation of the
* respective parent types.
* </para>
* </note>
*
* # Hiding a device #
* To hide a device, a DeviceListener function hide_device() needs to
* be registered.
* It can be used to defer adding a device and therefore hide it from
* the guest. The handler registering to this DeviceListener can save
* the QOpts passed to it for re-using it later. It must return if it
* wants the device to be hidden or visible. When the handler function
* decides the device shall be visible it will be added with
* qdev_device_add() and realized as any other device. Otherwise
* qdev_device_add() will return early without adding the device. The
* guest will not see a "hidden" device until it was marked visible
* and qdev_device_add called again.
*
*/
struct DeviceClass {
/*< private >*/
ObjectClass parent_class;
/*< public >*/
DECLARE_BITMAP(categories, DEVICE_CATEGORY_MAX);
const char *fw_name;
const char *desc;
/*
* The underscore at the end ensures a compile-time error if someone
* assigns to dc->props instead of using device_class_set_props.
*/
Property *props_;
/*
* Can this device be instantiated with -device / device_add?
* All devices should support instantiation with device_add, and
* this flag should not exist. But we're not there, yet. Some
* devices fail to instantiate with cryptic error messages.
* Others instantiate, but don't work. Exposing users to such
* behavior would be cruel; clearing this flag will protect them.
* It should never be cleared without a comment explaining why it
* is cleared.
* TODO remove once we're there
*/
bool user_creatable;
bool hotpluggable;
/* callbacks */
/*
* Reset method here is deprecated and replaced by methods in the
* resettable class interface to implement a multi-phase reset.
* TODO: remove once every reset callback is unused
*/
DeviceReset reset;
DeviceRealize realize;
DeviceUnrealize unrealize;
/* device state */
const VMStateDescription *vmsd;
/* Private to qdev / bus. */
const char *bus_type;
};
typedef struct NamedGPIOList NamedGPIOList;
struct NamedGPIOList {
char *name;
qemu_irq *in;
int num_in;
int num_out;
QLIST_ENTRY(NamedGPIOList) node;
};
typedef struct Clock Clock;
typedef struct NamedClockList NamedClockList;
struct NamedClockList {
char *name;
Clock *clock;
bool output;
bool alias;
QLIST_ENTRY(NamedClockList) node;
};
/**
* DeviceState:
* @realized: Indicates whether the device has been fully constructed.
* When accessed outside big qemu lock, must be accessed with
* qatomic_load_acquire()
* @reset: ResettableState for the device; handled by Resettable interface.
*
* This structure should not be accessed directly. We declare it here
* so that it can be embedded in individual device state structures.
*/
struct DeviceState {
/*< private >*/
Object parent_obj;
/*< public >*/
char *id;
char *canonical_path;
bool realized;
bool pending_deleted_event;
int64_t pending_deleted_expires_ms;
QDict *opts;
int hotplugged;
bool allow_unplug_during_migration;
BusState *parent_bus;
QLIST_HEAD(, NamedGPIOList) gpios;
QLIST_HEAD(, NamedClockList) clocks;
QLIST_HEAD(, BusState) child_bus;
int num_child_bus;
int instance_id_alias;
int alias_required_for_version;
ResettableState reset;
GSList *unplug_blockers;
};
struct DeviceListener {
void (*realize)(DeviceListener *listener, DeviceState *dev);
void (*unrealize)(DeviceListener *listener, DeviceState *dev);
/*
* This callback is called upon init of the DeviceState and
* informs qdev if a device should be visible or hidden. We can
* hide a failover device depending for example on the device
* opts.
*
* On errors, it returns false and errp is set. Device creation
* should fail in this case.
*/
bool (*hide_device)(DeviceListener *listener, const QDict *device_opts,
bool from_json, Error **errp);
QTAILQ_ENTRY(DeviceListener) link;
};
#define TYPE_BUS "bus"
DECLARE_OBJ_CHECKERS(BusState, BusClass,
BUS, TYPE_BUS)
struct BusClass {
ObjectClass parent_class;
/* FIXME first arg should be BusState */
void (*print_dev)(Monitor *mon, DeviceState *dev, int indent);
char *(*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. Individual bus
* bindings can be found at http://playground.sun.com/1275/bindings/.
*/
char *(*get_fw_dev_path)(DeviceState *dev);
void (*reset)(BusState *bus);
/*
* Return whether the device can be added to @bus,
* based on the address that was set (via device properties)
* before realize. If not, on return @errp contains the
* human-readable error message.
*/
bool (*check_address)(BusState *bus, DeviceState *dev, Error **errp);
BusRealize realize;
BusUnrealize unrealize;
/* maximum devices allowed on the bus, 0: no limit. */
int max_dev;
/* number of automatically allocated bus ids (e.g. ide.0) */
int automatic_ids;
};
typedef struct BusChild {
struct rcu_head rcu;
DeviceState *child;
int index;
QTAILQ_ENTRY(BusChild) sibling;
} BusChild;
#define QDEV_HOTPLUG_HANDLER_PROPERTY "hotplug-handler"
/**
* BusState:
* @hotplug_handler: link to a hotplug handler associated with bus.
* @reset: ResettableState for the bus; handled by Resettable interface.
*/
struct BusState {
Object obj;
DeviceState *parent;
char *name;
HotplugHandler *hotplug_handler;
int max_index;
bool realized;
bool full;
int num_children;
/*
* children is a RCU QTAILQ, thus readers must use RCU to access it,
* and writers must hold the big qemu lock
*/
QTAILQ_HEAD(, BusChild) children;
QLIST_ENTRY(BusState) sibling;
ResettableState reset;
};
/**
* GlobalProperty:
* @used: Set to true if property was used when initializing a device.
* @optional: If set to true, GlobalProperty will be skipped without errors
* if the property doesn't exist.
*
* An error is fatal for non-hotplugged devices, when the global is applied.
*/
typedef struct GlobalProperty {
const char *driver;
const char *property;
const char *value;
bool used;
bool optional;
} GlobalProperty;
static inline void
compat_props_add(GPtrArray *arr,
GlobalProperty props[], size_t nelem)
{
int i;
for (i = 0; i < nelem; i++) {
g_ptr_array_add(arr, (void *)&props[i]);
}
}
/*** Board API. This should go away once we have a machine config file. ***/
/**
* qdev_new: Create a device on the heap
* @name: device type to create (we assert() that this type exists)
*
* This only allocates the memory and initializes the device state
* structure, ready for the caller to set properties if they wish.
* The device still needs to be realized.
* The returned object has a reference count of 1.
*/
DeviceState *qdev_new(const char *name);
/**
* qdev_try_new: Try to create a device on the heap
* @name: device type to create
*
* This is like qdev_new(), except it returns %NULL when type @name
* does not exist, rather than asserting.
*/
DeviceState *qdev_try_new(const char *name);
/**
* qdev_realize: Realize @dev.
* @dev: device to realize
* @bus: bus to plug it into (may be NULL)
* @errp: pointer to error object
*
* "Realize" the device, i.e. perform the second phase of device
* initialization.
* @dev must not be plugged into a bus already.
* If @bus, plug @dev into @bus. This takes a reference to @dev.
* If @dev has no QOM parent, make one up, taking another reference.
* On success, return true.
* On failure, store an error through @errp and return false.
*
* If you created @dev using qdev_new(), you probably want to use
* qdev_realize_and_unref() instead.
*/
bool qdev_realize(DeviceState *dev, BusState *bus, Error **errp);
/**
* qdev_realize_and_unref: Realize @dev and drop a reference
* @dev: device to realize
* @bus: bus to plug it into (may be NULL)
* @errp: pointer to error object
*
* Realize @dev and drop a reference.
* This is like qdev_realize(), except the caller must hold a
* (private) reference, which is dropped on return regardless of
* success or failure. Intended use::
*
* dev = qdev_new();
* [...]
* qdev_realize_and_unref(dev, bus, errp);
*
* Now @dev can go away without further ado.
*
* If you are embedding the device into some other QOM device and
* initialized it via some variant on object_initialize_child() then
* do not use this function, because that family of functions arrange
* for the only reference to the child device to be held by the parent
* via the child<> property, and so the reference-count-drop done here
* would be incorrect. For that use case you want qdev_realize().
*/
bool qdev_realize_and_unref(DeviceState *dev, BusState *bus, Error **errp);
/**
* qdev_unrealize: Unrealize a device
* @dev: device to unrealize
*
* This function will "unrealize" a device, which is the first phase
* of correctly destroying a device that has been realized. It will:
*
* - unrealize any child buses by calling qbus_unrealize()
* (this will recursively unrealize any devices on those buses)
* - call the unrealize method of @dev
*
* The device can then be freed by causing its reference count to go
* to zero.
*
* Warning: most devices in QEMU do not expect to be unrealized. Only
* devices which are hot-unpluggable should be unrealized (as part of
* the unplugging process); all other devices are expected to last for
* the life of the simulation and should not be unrealized and freed.
*/
void qdev_unrealize(DeviceState *dev);
void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
int required_for_version);
HotplugHandler *qdev_get_bus_hotplug_handler(DeviceState *dev);
HotplugHandler *qdev_get_machine_hotplug_handler(DeviceState *dev);
bool qdev_hotplug_allowed(DeviceState *dev, Error **errp);
/**
* qdev_get_hotplug_handler: Get handler responsible for device wiring
*
* Find HOTPLUG_HANDLER for @dev that provides [pre|un]plug callbacks for it.
*
* Note: in case @dev has a parent bus, it will be returned as handler unless
* machine handler overrides it.
*
* Returns: pointer to object that implements TYPE_HOTPLUG_HANDLER interface
* or NULL if there aren't any.
*/
HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev);
void qdev_unplug(DeviceState *dev, Error **errp);
void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp);
void qdev_machine_creation_done(void);
bool qdev_machine_modified(void);
/**
* qdev_add_unplug_blocker: Add an unplug blocker to a device
*
* @dev: Device to be blocked from unplug
* @reason: Reason for blocking
*/
void qdev_add_unplug_blocker(DeviceState *dev, Error *reason);
/**
* qdev_del_unplug_blocker: Remove an unplug blocker from a device
*
* @dev: Device to be unblocked
* @reason: Pointer to the Error used with qdev_add_unplug_blocker.
* Used as a handle to lookup the blocker for deletion.
*/
void qdev_del_unplug_blocker(DeviceState *dev, Error *reason);
/**
* qdev_unplug_blocked: Confirm if a device is blocked from unplug
*
* @dev: Device to be tested
* @reason: Returns one of the reasons why the device is blocked,
* if any
*
* Returns: true if device is blocked from unplug, false otherwise
*/
bool qdev_unplug_blocked(DeviceState *dev, Error **errp);
/**
* GpioPolarity: Polarity of a GPIO line
*
* GPIO lines use either positive (active-high) logic,
* or negative (active-low) logic.
*
* In active-high logic (%GPIO_POLARITY_ACTIVE_HIGH), a pin is
* active when the voltage on the pin is high (relative to ground);
* whereas in active-low logic (%GPIO_POLARITY_ACTIVE_LOW), a pin
* is active when the voltage on the pin is low (or grounded).
*/
typedef enum {
GPIO_POLARITY_ACTIVE_LOW,
GPIO_POLARITY_ACTIVE_HIGH
} GpioPolarity;
/**
* qdev_get_gpio_in: Get one of a device's anonymous input GPIO lines
* @dev: Device whose GPIO we want
* @n: Number of the anonymous GPIO line (which must be in range)
*
* Returns the qemu_irq corresponding to an anonymous input GPIO line
* (which the device has set up with qdev_init_gpio_in()). The index
* @n of the GPIO line must be valid (i.e. be at least 0 and less than
* the total number of anonymous input GPIOs the device has); this
* function will assert() if passed an invalid index.
*
* This function is intended to be used by board code or SoC "container"
* device models to wire up the GPIO lines; usually the return value
* will be passed to qdev_connect_gpio_out() or a similar function to
* connect another device's output GPIO line to this input.
*
* For named input GPIO lines, use qdev_get_gpio_in_named().
*/
qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
/**
* qdev_get_gpio_in_named: Get one of a device's named input GPIO lines
* @dev: Device whose GPIO we want
* @name: Name of the input GPIO array
* @n: Number of the GPIO line in that array (which must be in range)
*
* Returns the qemu_irq corresponding to a named input GPIO line
* (which the device has set up with qdev_init_gpio_in_named()).
* The @name string must correspond to an input GPIO array which exists on
* the device, and the index @n of the GPIO line must be valid (i.e.
* be at least 0 and less than the total number of input GPIOs in that
* array); this function will assert() if passed an invalid name or index.
*
* For anonymous input GPIO lines, use qdev_get_gpio_in().
*/
qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const char *name, int n);
/**
* qdev_connect_gpio_out: Connect one of a device's anonymous output GPIO lines
* @dev: Device whose GPIO to connect
* @n: Number of the anonymous output GPIO line (which must be in range)
* @input_pin: qemu_irq to connect the output line to
*
* This function connects an anonymous output GPIO line on a device
* up to an arbitrary qemu_irq, so that when the device asserts that
* output GPIO line, the qemu_irq's callback is invoked.
* The index @n of the GPIO line must be valid (i.e. be at least 0 and
* less than the total number of anonymous output GPIOs the device has
* created with qdev_init_gpio_out()); otherwise this function will assert().
*
* Outbound GPIO lines can be connected to any qemu_irq, but the common
* case is connecting them to another device's inbound GPIO line, using
* the qemu_irq returned by qdev_get_gpio_in() or qdev_get_gpio_in_named().
*
* It is not valid to try to connect one outbound GPIO to multiple
* qemu_irqs at once, or to connect multiple outbound GPIOs to the
* same qemu_irq. (Warning: there is no assertion or other guard to
* catch this error: the model will just not do the right thing.)
* Instead, for fan-out you can use the TYPE_SPLIT_IRQ device: connect
* a device's outbound GPIO to the splitter's input, and connect each
* of the splitter's outputs to a different device. For fan-in you
* can use the TYPE_OR_IRQ device, which is a model of a logical OR
* gate with multiple inputs and one output.
*
* For named output GPIO lines, use qdev_connect_gpio_out_named().
*/
void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
/**
* qdev_connect_gpio_out_named: Connect one of a device's named output
* GPIO lines
* @dev: Device whose GPIO to connect
* @name: Name of the output GPIO array
* @n: Number of the anonymous output GPIO line (which must be in range)
* @input_pin: qemu_irq to connect the output line to
*
* This function connects an anonymous output GPIO line on a device
* up to an arbitrary qemu_irq, so that when the device asserts that
* output GPIO line, the qemu_irq's callback is invoked.
* The @name string must correspond to an output GPIO array which exists on
* the device, and the index @n of the GPIO line must be valid (i.e.
* be at least 0 and less than the total number of input GPIOs in that
* array); this function will assert() if passed an invalid name or index.
*
* Outbound GPIO lines can be connected to any qemu_irq, but the common
* case is connecting them to another device's inbound GPIO line, using
* the qemu_irq returned by qdev_get_gpio_in() or qdev_get_gpio_in_named().
*
* It is not valid to try to connect one outbound GPIO to multiple
* qemu_irqs at once, or to connect multiple outbound GPIOs to the
* same qemu_irq; see qdev_connect_gpio_out() for details.
*
* For anonymous output GPIO lines, use qdev_connect_gpio_out().
*/
void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
qemu_irq input_pin);
/**
* qdev_get_gpio_out_connector: Get the qemu_irq connected to an output GPIO
* @dev: Device whose output GPIO we are interested in
* @name: Name of the output GPIO array
* @n: Number of the output GPIO line within that array
*
* Returns whatever qemu_irq is currently connected to the specified
* output GPIO line of @dev. This will be NULL if the output GPIO line
* has never been wired up to the anything. Note that the qemu_irq
* returned does not belong to @dev -- it will be the input GPIO or
* IRQ of whichever device the board code has connected up to @dev's
* output GPIO.
*
* You probably don't need to use this function -- it is used only
* by the platform-bus subsystem.
*/
qemu_irq qdev_get_gpio_out_connector(DeviceState *dev, const char *name, int n);
/**
* qdev_intercept_gpio_out: Intercept an existing GPIO connection
* @dev: Device to intercept the outbound GPIO line from
* @icpt: New qemu_irq to connect instead
* @name: Name of the output GPIO array
* @n: Number of the GPIO line in the array
*
* This function is provided only for use by the qtest testing framework
* and is not suitable for use in non-testing parts of QEMU.
*
* This function breaks an existing connection of an outbound GPIO
* line from @dev, and replaces it with the new qemu_irq @icpt, as if
* ``qdev_connect_gpio_out_named(dev, icpt, name, n)`` had been called.
* The previously connected qemu_irq is returned, so it can be restored
* by a second call to qdev_intercept_gpio_out() if desired.
*/
qemu_irq qdev_intercept_gpio_out(DeviceState *dev, qemu_irq icpt,
const char *name, int n);
BusState *qdev_get_child_bus(DeviceState *dev, const char *name);
/*** Device API. ***/
/**
* qdev_init_gpio_in: create an array of anonymous input GPIO lines
* @dev: Device to create input GPIOs for
* @handler: Function to call when GPIO line value is set
* @n: Number of GPIO lines to create
*
* Devices should use functions in the qdev_init_gpio_in* family in
* their instance_init or realize methods to create any input GPIO
* lines they need. There is no functional difference between
* anonymous and named GPIO lines. Stylistically, named GPIOs are
* preferable (easier to understand at callsites) unless a device
* has exactly one uniform kind of GPIO input whose purpose is obvious.
* Note that input GPIO lines can serve as 'sinks' for IRQ lines.
*
* See qdev_get_gpio_in() for how code that uses such a device can get
* hold of an input GPIO line to manipulate it.
*/
void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n);
/**
* qdev_init_gpio_out: create an array of anonymous output GPIO lines
* @dev: Device to create output GPIOs for
* @pins: Pointer to qemu_irq or qemu_irq array for the GPIO lines
* @n: Number of GPIO lines to create
*
* Devices should use functions in the qdev_init_gpio_out* family
* in their instance_init or realize methods to create any output
* GPIO lines they need. There is no functional difference between
* anonymous and named GPIO lines. Stylistically, named GPIOs are
* preferable (easier to understand at callsites) unless a device
* has exactly one uniform kind of GPIO output whose purpose is obvious.
*
* The @pins argument should be a pointer to either a "qemu_irq"
* (if @n == 1) or a "qemu_irq []" array (if @n > 1) in the device's
* state structure. The device implementation can then raise and
* lower the GPIO line by calling qemu_set_irq(). (If anything is
* connected to the other end of the GPIO this will cause the handler
* function for that input GPIO to be called.)
*
* See qdev_connect_gpio_out() for how code that uses such a device
* can connect to one of its output GPIO lines.
*
* There is no need to release the @pins allocated array because it
* will be automatically released when @dev calls its instance_finalize()
* handler.
*/
void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n);
/**
* qdev_init_gpio_out_named: create an array of named output GPIO lines
* @dev: Device to create output GPIOs for
* @pins: Pointer to qemu_irq or qemu_irq array for the GPIO lines
* @name: Name to give this array of GPIO lines
* @n: Number of GPIO lines to create
*
* Like qdev_init_gpio_out(), but creates an array of GPIO output lines
* with a name. Code using the device can then connect these GPIO lines
* using qdev_connect_gpio_out_named().
*/
void qdev_init_gpio_out_named(DeviceState *dev, qemu_irq *pins,
const char *name, int n);
/**
* qdev_init_gpio_in_named_with_opaque: create an array of input GPIO lines
* for the specified device
*
* @dev: Device to create input GPIOs for
* @handler: Function to call when GPIO line value is set
* @opaque: Opaque data pointer to pass to @handler
* @name: Name of the GPIO input (must be unique for this device)
* @n: Number of GPIO lines in this input set
*/
void qdev_init_gpio_in_named_with_opaque(DeviceState *dev,
qemu_irq_handler handler,
void *opaque,
const char *name, int n);
/**
* qdev_init_gpio_in_named: create an array of input GPIO lines
* for the specified device
*
* Like qdev_init_gpio_in_named_with_opaque(), but the opaque pointer
* passed to the handler is @dev (which is the most commonly desired behaviour).
*/
static inline void qdev_init_gpio_in_named(DeviceState *dev,
qemu_irq_handler handler,
const char *name, int n)
{
qdev_init_gpio_in_named_with_opaque(dev, handler, dev, name, n);
}
/**
* qdev_pass_gpios: create GPIO lines on container which pass through to device
* @dev: Device which has GPIO lines
* @container: Container device which needs to expose them
* @name: Name of GPIO array to pass through (NULL for the anonymous GPIO array)
*
* In QEMU, complicated devices like SoCs are often modelled with a
* "container" QOM device which itself contains other QOM devices and
* which wires them up appropriately. This function allows the container
* to create GPIO arrays on itself which simply pass through to a GPIO
* array of one of its internal devices.
*
* If @dev has both input and output GPIOs named @name then both will
* be passed through. It is not possible to pass a subset of the array
* with this function.
*
* To users of the container device, the GPIO array created on @container
* behaves exactly like any other.
*/
void qdev_pass_gpios(DeviceState *dev, DeviceState *container,
const char *name);
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_init(void *bus, size_t size, const char *typename,
DeviceState *parent, const char *name);
BusState *qbus_new(const char *typename, DeviceState *parent, const char *name);
bool qbus_realize(BusState *bus, Error **errp);
void qbus_unrealize(BusState *bus);
/* 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 *pre_devfn, qbus_walkerfn *pre_busfn,
qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
void *opaque);
int qdev_walk_children(DeviceState *dev,
qdev_walkerfn *pre_devfn, qbus_walkerfn *pre_busfn,
qdev_walkerfn *post_devfn, qbus_walkerfn *post_busfn,
void *opaque);
/**
* @qdev_reset_all:
* Reset @dev. See @qbus_reset_all() for more details.
*
* Note: This function is deprecated and will be removed when it becomes unused.
* Please use device_cold_reset() now.
*/
void qdev_reset_all(DeviceState *dev);
void qdev_reset_all_fn(void *opaque);
/**
* @qbus_reset_all:
* @bus: Bus to be reset.
*
* Reset @bus and perform a bus-level ("hard") reset of all devices connected
* to it, including recursive processing of all buses below @bus itself. A
* hard reset means that qbus_reset_all will reset all state of the device.
* For PCI devices, for example, this will include the base address registers
* or configuration space.
*
* Note: This function is deprecated and will be removed when it becomes unused.
* Please use bus_cold_reset() now.
*/
void qbus_reset_all(BusState *bus);
void qbus_reset_all_fn(void *opaque);
/**
* device_cold_reset:
* Reset device @dev and perform a recursive processing using the resettable
* interface. It triggers a RESET_TYPE_COLD.
*/
void device_cold_reset(DeviceState *dev);
/**
* bus_cold_reset:
*
* Reset bus @bus and perform a recursive processing using the resettable
* interface. It triggers a RESET_TYPE_COLD.
*/
void bus_cold_reset(BusState *bus);
/**
* device_is_in_reset:
* Return true if the device @dev is currently being reset.
*/
bool device_is_in_reset(DeviceState *dev);
/**
* bus_is_in_reset:
* Return true if the bus @bus is currently being reset.
*/
bool bus_is_in_reset(BusState *bus);
/* This should go away once we get rid of the NULL bus hack */
BusState *sysbus_get_default(void);
char *qdev_get_fw_dev_path(DeviceState *dev);
char *qdev_get_own_fw_dev_path_from_handler(BusState *bus, DeviceState *dev);
/**
* device_legacy_reset:
*
* Reset a single device (by calling the reset method).
* Note: This function is deprecated and will be removed when it becomes unused.
* Please use device_cold_reset() now.
*/
void device_legacy_reset(DeviceState *dev);
void device_class_set_props(DeviceClass *dc, Property *props);
/**
* device_class_set_parent_reset:
* TODO: remove the function when DeviceClass's reset method
* is not used anymore.
*/
void device_class_set_parent_reset(DeviceClass *dc,
DeviceReset dev_reset,
DeviceReset *parent_reset);
void device_class_set_parent_realize(DeviceClass *dc,
DeviceRealize dev_realize,
DeviceRealize *parent_realize);
void device_class_set_parent_unrealize(DeviceClass *dc,
DeviceUnrealize dev_unrealize,
DeviceUnrealize *parent_unrealize);
const VMStateDescription *qdev_get_vmsd(DeviceState *dev);
const char *qdev_fw_name(DeviceState *dev);
void qdev_assert_realized_properly(void);
Object *qdev_get_machine(void);
/* FIXME: make this a link<> */
bool qdev_set_parent_bus(DeviceState *dev, BusState *bus, Error **errp);
extern bool qdev_hot_removed;
char *qdev_get_dev_path(DeviceState *dev);
void qbus_set_hotplug_handler(BusState *bus, Object *handler);
void qbus_set_bus_hotplug_handler(BusState *bus);
static inline bool qbus_is_hotpluggable(BusState *bus)
{
return bus->hotplug_handler;
}
/**
* qbus_mark_full: Mark this bus as full, so no more devices can be attached
* @bus: Bus to mark as full
*
* By default, QEMU will allow devices to be plugged into a bus up
* to the bus class's device count limit. Calling this function
* marks a particular bus as full, so that no more devices can be
* plugged into it. In particular this means that the bus will not
* be considered as a candidate for plugging in devices created by
* the user on the commandline or via the monitor.
* If a machine has multiple buses of a given type, such as I2C,
* where some of those buses in the real hardware are used only for
* internal devices and some are exposed via expansion ports, you
* can use this function to mark the internal-only buses as full
* after you have created all their internal devices. Then user
* created devices will appear on the expansion-port bus where
* guest software expects them.
*/
static inline void qbus_mark_full(BusState *bus)
{
bus->full = true;
}
void device_listener_register(DeviceListener *listener);
void device_listener_unregister(DeviceListener *listener);
/**
* @qdev_should_hide_device:
* @opts: options QDict
* @from_json: true if @opts entries are typed, false for all strings
* @errp: pointer to error object
*
* Check if a device should be added.
* When a device is added via qdev_device_add() this will be called,
* and return if the device should be added now or not.
*/
bool qdev_should_hide_device(const QDict *opts, bool from_json, Error **errp);
typedef enum MachineInitPhase {
/* current_machine is NULL. */
PHASE_NO_MACHINE,
/* current_machine is not NULL, but current_machine->accel is NULL. */
PHASE_MACHINE_CREATED,
/*
* current_machine->accel is not NULL, but the machine properties have
* not been validated and machine_class->init has not yet been called.
*/
PHASE_ACCEL_CREATED,
/*
* machine_class->init has been called, thus creating any embedded
* devices and validating machine properties. Devices created at
* this time are considered to be cold-plugged.
*/
PHASE_MACHINE_INITIALIZED,
/*
* QEMU is ready to start CPUs and devices created at this time
* are considered to be hot-plugged. The monitor is not restricted
* to "preconfig" commands.
*/
PHASE_MACHINE_READY,
} MachineInitPhase;
extern bool phase_check(MachineInitPhase phase);
extern void phase_advance(MachineInitPhase phase);
#endif
