Some very simple initialization routines can be nested in existing subsystem-level functions, do that to simplify qemu_init. Reviewed-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
852 lines
31 KiB
C
852 lines
31 KiB
C
#ifndef QDEV_CORE_H
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#define QDEV_CORE_H
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#include "qemu/queue.h"
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#include "qemu/bitmap.h"
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#include "qemu/rcu.h"
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#include "qemu/rcu_queue.h"
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#include "qom/object.h"
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#include "hw/hotplug.h"
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#include "hw/resettable.h"
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enum {
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DEV_NVECTORS_UNSPECIFIED = -1,
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};
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#define TYPE_DEVICE "device"
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OBJECT_DECLARE_TYPE(DeviceState, DeviceClass, DEVICE)
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typedef enum DeviceCategory {
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DEVICE_CATEGORY_BRIDGE,
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DEVICE_CATEGORY_USB,
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DEVICE_CATEGORY_STORAGE,
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DEVICE_CATEGORY_NETWORK,
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DEVICE_CATEGORY_INPUT,
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DEVICE_CATEGORY_DISPLAY,
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DEVICE_CATEGORY_SOUND,
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DEVICE_CATEGORY_MISC,
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DEVICE_CATEGORY_CPU,
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DEVICE_CATEGORY_MAX
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} DeviceCategory;
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typedef void (*DeviceRealize)(DeviceState *dev, Error **errp);
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typedef void (*DeviceUnrealize)(DeviceState *dev);
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typedef void (*DeviceReset)(DeviceState *dev);
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typedef void (*BusRealize)(BusState *bus, Error **errp);
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typedef void (*BusUnrealize)(BusState *bus);
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/**
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* DeviceClass:
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* @props: Properties accessing state fields.
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* @realize: Callback function invoked when the #DeviceState:realized
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* property is changed to %true.
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* @unrealize: Callback function invoked when the #DeviceState:realized
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* property is changed to %false.
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* @hotpluggable: indicates if #DeviceClass is hotpluggable, available
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* as readonly "hotpluggable" property of #DeviceState instance
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*
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* # Realization #
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* Devices are constructed in two stages,
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* 1) object instantiation via object_initialize() and
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* 2) device realization via #DeviceState:realized property.
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* The former may not fail (and must not abort or exit, since it is called
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* during device introspection already), and the latter may return error
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* information to the caller and must be re-entrant.
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* Trivial field initializations should go into #TypeInfo.instance_init.
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* Operations depending on @props static properties should go into @realize.
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* After successful realization, setting static properties will fail.
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*
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* As an interim step, the #DeviceState:realized property can also be
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* set with qdev_realize().
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* In the future, devices will propagate this state change to their children
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* and along busses they expose.
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* The point in time will be deferred to machine creation, so that values
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* set in @realize will not be introspectable beforehand. Therefore devices
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* must not create children during @realize; they should initialize them via
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* object_initialize() in their own #TypeInfo.instance_init and forward the
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* realization events appropriately.
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*
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* Any type may override the @realize and/or @unrealize callbacks but needs
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* to call the parent type's implementation if keeping their functionality
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* is desired. Refer to QOM documentation for further discussion and examples.
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*
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* <note>
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* <para>
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* Since TYPE_DEVICE doesn't implement @realize and @unrealize, types
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* derived directly from it need not call their parent's @realize and
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* @unrealize.
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* For other types consult the documentation and implementation of the
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* respective parent types.
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* </para>
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* </note>
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*
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* # Hiding a device #
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* To hide a device, a DeviceListener function hide_device() needs to
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* be registered.
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* It can be used to defer adding a device and therefore hide it from
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* the guest. The handler registering to this DeviceListener can save
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* the QOpts passed to it for re-using it later. It must return if it
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* wants the device to be hidden or visible. When the handler function
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* decides the device shall be visible it will be added with
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* qdev_device_add() and realized as any other device. Otherwise
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* qdev_device_add() will return early without adding the device. The
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* guest will not see a "hidden" device until it was marked visible
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* and qdev_device_add called again.
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*
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*/
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struct DeviceClass {
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/*< private >*/
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ObjectClass parent_class;
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/*< public >*/
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DECLARE_BITMAP(categories, DEVICE_CATEGORY_MAX);
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const char *fw_name;
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const char *desc;
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/*
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* The underscore at the end ensures a compile-time error if someone
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* assigns to dc->props instead of using device_class_set_props.
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*/
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Property *props_;
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/*
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* Can this device be instantiated with -device / device_add?
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* All devices should support instantiation with device_add, and
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* this flag should not exist. But we're not there, yet. Some
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* devices fail to instantiate with cryptic error messages.
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* Others instantiate, but don't work. Exposing users to such
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* behavior would be cruel; clearing this flag will protect them.
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* It should never be cleared without a comment explaining why it
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* is cleared.
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* TODO remove once we're there
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*/
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bool user_creatable;
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bool hotpluggable;
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/* callbacks */
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/*
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* Reset method here is deprecated and replaced by methods in the
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* resettable class interface to implement a multi-phase reset.
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* TODO: remove once every reset callback is unused
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*/
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DeviceReset reset;
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DeviceRealize realize;
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DeviceUnrealize unrealize;
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/* device state */
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const VMStateDescription *vmsd;
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/* Private to qdev / bus. */
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const char *bus_type;
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};
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typedef struct NamedGPIOList NamedGPIOList;
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struct NamedGPIOList {
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char *name;
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qemu_irq *in;
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int num_in;
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int num_out;
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QLIST_ENTRY(NamedGPIOList) node;
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};
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typedef struct Clock Clock;
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typedef struct NamedClockList NamedClockList;
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struct NamedClockList {
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char *name;
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Clock *clock;
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bool output;
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bool alias;
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QLIST_ENTRY(NamedClockList) node;
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};
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/**
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* DeviceState:
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* @realized: Indicates whether the device has been fully constructed.
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* When accessed outside big qemu lock, must be accessed with
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* qatomic_load_acquire()
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* @reset: ResettableState for the device; handled by Resettable interface.
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*
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* This structure should not be accessed directly. We declare it here
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* so that it can be embedded in individual device state structures.
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*/
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struct DeviceState {
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/*< private >*/
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Object parent_obj;
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/*< public >*/
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const char *id;
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char *canonical_path;
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bool realized;
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bool pending_deleted_event;
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QemuOpts *opts;
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int hotplugged;
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bool allow_unplug_during_migration;
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BusState *parent_bus;
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QLIST_HEAD(, NamedGPIOList) gpios;
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QLIST_HEAD(, NamedClockList) clocks;
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QLIST_HEAD(, BusState) child_bus;
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int num_child_bus;
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int instance_id_alias;
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int alias_required_for_version;
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ResettableState reset;
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};
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struct DeviceListener {
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void (*realize)(DeviceListener *listener, DeviceState *dev);
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void (*unrealize)(DeviceListener *listener, DeviceState *dev);
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/*
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* This callback is called upon init of the DeviceState and
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* informs qdev if a device should be visible or hidden. We can
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* hide a failover device depending for example on the device
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* opts.
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*/
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bool (*hide_device)(DeviceListener *listener, QemuOpts *device_opts);
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QTAILQ_ENTRY(DeviceListener) link;
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};
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#define TYPE_BUS "bus"
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DECLARE_OBJ_CHECKERS(BusState, BusClass,
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BUS, TYPE_BUS)
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struct BusClass {
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ObjectClass parent_class;
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/* FIXME first arg should be BusState */
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void (*print_dev)(Monitor *mon, DeviceState *dev, int indent);
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char *(*get_dev_path)(DeviceState *dev);
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/*
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* This callback is used to create Open Firmware device path in accordance
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* with OF spec http://forthworks.com/standards/of1275.pdf. Individual bus
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* bindings can be found at http://playground.sun.com/1275/bindings/.
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*/
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char *(*get_fw_dev_path)(DeviceState *dev);
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void (*reset)(BusState *bus);
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/*
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* Return whether the device can be added to @bus,
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* based on the address that was set (via device properties)
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* before realize. If not, on return @errp contains the
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* human-readable error message.
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*/
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bool (*check_address)(BusState *bus, DeviceState *dev, Error **errp);
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BusRealize realize;
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BusUnrealize unrealize;
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/* maximum devices allowed on the bus, 0: no limit. */
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int max_dev;
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/* number of automatically allocated bus ids (e.g. ide.0) */
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int automatic_ids;
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};
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typedef struct BusChild {
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struct rcu_head rcu;
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DeviceState *child;
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int index;
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QTAILQ_ENTRY(BusChild) sibling;
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} BusChild;
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#define QDEV_HOTPLUG_HANDLER_PROPERTY "hotplug-handler"
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/**
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* BusState:
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* @hotplug_handler: link to a hotplug handler associated with bus.
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* @reset: ResettableState for the bus; handled by Resettable interface.
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*/
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struct BusState {
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Object obj;
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DeviceState *parent;
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char *name;
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HotplugHandler *hotplug_handler;
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int max_index;
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bool realized;
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int num_children;
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/*
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* children is a RCU QTAILQ, thus readers must use RCU to access it,
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* and writers must hold the big qemu lock
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*/
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QTAILQ_HEAD(, BusChild) children;
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QLIST_ENTRY(BusState) sibling;
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ResettableState reset;
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};
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/**
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* Property:
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* @set_default: true if the default value should be set from @defval,
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* in which case @info->set_default_value must not be NULL
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* (if false then no default value is set by the property system
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* and the field retains whatever value it was given by instance_init).
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* @defval: default value for the property. This is used only if @set_default
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* is true.
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*/
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struct Property {
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const char *name;
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const PropertyInfo *info;
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ptrdiff_t offset;
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uint8_t bitnr;
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bool set_default;
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union {
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int64_t i;
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uint64_t u;
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} defval;
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int arrayoffset;
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const PropertyInfo *arrayinfo;
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int arrayfieldsize;
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const char *link_type;
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};
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struct PropertyInfo {
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const char *name;
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const char *description;
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const QEnumLookup *enum_table;
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int (*print)(DeviceState *dev, Property *prop, char *dest, size_t len);
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void (*set_default_value)(ObjectProperty *op, const Property *prop);
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void (*create)(ObjectClass *oc, Property *prop);
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ObjectPropertyAccessor *get;
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ObjectPropertyAccessor *set;
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ObjectPropertyRelease *release;
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};
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/**
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* GlobalProperty:
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* @used: Set to true if property was used when initializing a device.
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* @optional: If set to true, GlobalProperty will be skipped without errors
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* if the property doesn't exist.
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*
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* An error is fatal for non-hotplugged devices, when the global is applied.
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*/
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typedef struct GlobalProperty {
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const char *driver;
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const char *property;
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const char *value;
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bool used;
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bool optional;
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} GlobalProperty;
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static inline void
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compat_props_add(GPtrArray *arr,
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GlobalProperty props[], size_t nelem)
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{
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int i;
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for (i = 0; i < nelem; i++) {
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g_ptr_array_add(arr, (void *)&props[i]);
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}
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}
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/*** Board API. This should go away once we have a machine config file. ***/
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/**
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* qdev_new: Create a device on the heap
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* @name: device type to create (we assert() that this type exists)
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*
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* This only allocates the memory and initializes the device state
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* structure, ready for the caller to set properties if they wish.
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* The device still needs to be realized.
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* The returned object has a reference count of 1.
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*/
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DeviceState *qdev_new(const char *name);
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/**
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* qdev_try_new: Try to create a device on the heap
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* @name: device type to create
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*
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* This is like qdev_new(), except it returns %NULL when type @name
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* does not exist, rather than asserting.
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*/
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DeviceState *qdev_try_new(const char *name);
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/**
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* qdev_realize: Realize @dev.
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* @dev: device to realize
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* @bus: bus to plug it into (may be NULL)
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* @errp: pointer to error object
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*
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* "Realize" the device, i.e. perform the second phase of device
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* initialization.
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* @dev must not be plugged into a bus already.
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* If @bus, plug @dev into @bus. This takes a reference to @dev.
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* If @dev has no QOM parent, make one up, taking another reference.
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* On success, return true.
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* On failure, store an error through @errp and return false.
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*
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* If you created @dev using qdev_new(), you probably want to use
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* qdev_realize_and_unref() instead.
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*/
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bool qdev_realize(DeviceState *dev, BusState *bus, Error **errp);
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/**
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* qdev_realize_and_unref: Realize @dev and drop a reference
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* @dev: device to realize
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* @bus: bus to plug it into (may be NULL)
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* @errp: pointer to error object
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*
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* Realize @dev and drop a reference.
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* This is like qdev_realize(), except the caller must hold a
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* (private) reference, which is dropped on return regardless of
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* success or failure. Intended use::
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*
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* dev = qdev_new();
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* [...]
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* qdev_realize_and_unref(dev, bus, errp);
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*
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* Now @dev can go away without further ado.
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*
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* If you are embedding the device into some other QOM device and
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* initialized it via some variant on object_initialize_child() then
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* do not use this function, because that family of functions arrange
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* for the only reference to the child device to be held by the parent
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* via the child<> property, and so the reference-count-drop done here
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* would be incorrect. For that use case you want qdev_realize().
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*/
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bool qdev_realize_and_unref(DeviceState *dev, BusState *bus, Error **errp);
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/**
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* qdev_unrealize: Unrealize a device
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* @dev: device to unrealize
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*
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* This function will "unrealize" a device, which is the first phase
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* of correctly destroying a device that has been realized. It will:
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*
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* - unrealize any child buses by calling qbus_unrealize()
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* (this will recursively unrealize any devices on those buses)
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* - call the the unrealize method of @dev
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*
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* The device can then be freed by causing its reference count to go
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* to zero.
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*
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* Warning: most devices in QEMU do not expect to be unrealized. Only
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* devices which are hot-unpluggable should be unrealized (as part of
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* the unplugging process); all other devices are expected to last for
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* the life of the simulation and should not be unrealized and freed.
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*/
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void qdev_unrealize(DeviceState *dev);
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void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
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int required_for_version);
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HotplugHandler *qdev_get_bus_hotplug_handler(DeviceState *dev);
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HotplugHandler *qdev_get_machine_hotplug_handler(DeviceState *dev);
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bool qdev_hotplug_allowed(DeviceState *dev, Error **errp);
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/**
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* qdev_get_hotplug_handler: Get handler responsible for device wiring
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*
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* Find HOTPLUG_HANDLER for @dev that provides [pre|un]plug callbacks for it.
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*
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* Note: in case @dev has a parent bus, it will be returned as handler unless
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* machine handler overrides it.
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*
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* Returns: pointer to object that implements TYPE_HOTPLUG_HANDLER interface
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* or NULL if there aren't any.
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*/
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HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev);
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void qdev_unplug(DeviceState *dev, Error **errp);
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void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
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DeviceState *dev, Error **errp);
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void qdev_machine_creation_done(void);
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bool qdev_machine_modified(void);
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/**
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* GpioPolarity: Polarity of a GPIO line
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*
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* GPIO lines use either positive (active-high) logic,
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* or negative (active-low) logic.
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*
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* In active-high logic (%GPIO_POLARITY_ACTIVE_HIGH), a pin is
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* active when the voltage on the pin is high (relative to ground);
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* whereas in active-low logic (%GPIO_POLARITY_ACTIVE_LOW), a pin
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* is active when the voltage on the pin is low (or grounded).
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*/
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typedef enum {
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GPIO_POLARITY_ACTIVE_LOW,
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GPIO_POLARITY_ACTIVE_HIGH
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} GpioPolarity;
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/**
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* qdev_get_gpio_in: Get one of a device's anonymous input GPIO lines
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* @dev: Device whose GPIO we want
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* @n: Number of the anonymous GPIO line (which must be in range)
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*
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* Returns the qemu_irq corresponding to an anonymous input GPIO line
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* (which the device has set up with qdev_init_gpio_in()). The index
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* @n of the GPIO line must be valid (i.e. be at least 0 and less than
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* the total number of anonymous input GPIOs the device has); this
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* function will assert() if passed an invalid index.
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*
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* This function is intended to be used by board code or SoC "container"
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* device models to wire up the GPIO lines; usually the return value
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* will be passed to qdev_connect_gpio_out() or a similar function to
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* connect another device's output GPIO line to this input.
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*
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* For named input GPIO lines, use qdev_get_gpio_in_named().
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*/
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qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
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/**
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* qdev_get_gpio_in_named: Get one of a device's named input GPIO lines
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* @dev: Device whose GPIO we want
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* @name: Name of the input GPIO array
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* @n: Number of the GPIO line in that array (which must be in range)
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*
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* Returns the qemu_irq corresponding to a named input GPIO line
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* (which the device has set up with qdev_init_gpio_in_named()).
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* The @name string must correspond to an input GPIO array which exists on
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* the device, and the index @n of the GPIO line must be valid (i.e.
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* be at least 0 and less than the total number of input GPIOs in that
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* 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)
|
|
* @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_IRQ_SPLIT 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: Connect one of a device's anonymous 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)
|
|
* @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 named output GPIO lines, use qdev_connect_gpio_out_named().
|
|
*/
|
|
void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
|
|
qemu_irq 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.
|
|
*/
|
|
void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n);
|
|
/**
|
|
* qdev_init_gpio_out: 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_create_inplace(void *bus, size_t size, const char *typename,
|
|
DeviceState *parent, const char *name);
|
|
BusState *qbus_create(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);
|
|
|
|
Object *qdev_get_machine(void);
|
|
|
|
/* FIXME: make this a link<> */
|
|
bool qdev_set_parent_bus(DeviceState *dev, BusState *bus, Error **errp);
|
|
|
|
extern bool qdev_hotplug;
|
|
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;
|
|
}
|
|
|
|
void device_listener_register(DeviceListener *listener);
|
|
void device_listener_unregister(DeviceListener *listener);
|
|
|
|
/**
|
|
* @qdev_should_hide_device:
|
|
* @opts: QemuOpts as passed on cmdline.
|
|
*
|
|
* 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(QemuOpts *opts);
|
|
|
|
#endif
|