hw/qdev-core.h

   1 #ifndef QDEV_CORE_H
   2 #define QDEV_CORE_H
   3
   4 #include "qemu/queue.h"
   5 #include "qemu/option.h"
   6 #include "qemu/typedefs.h"
   7 #include "qom/object.h"
   8 #include "hw/irq.h"
   9 #include "qapi/error.h"
  10
  11 enum DevState {
  12     DEV_STATE_CREATED = 1,
  13     DEV_STATE_INITIALIZED,
  14 };
  15
  16 enum {
  17     DEV_NVECTORS_UNSPECIFIED = -1,
  18 };
  19
  20 #define TYPE_DEVICE "device"
  21 #define DEVICE(obj) OBJECT_CHECK(DeviceState, (obj), TYPE_DEVICE)
  22 #define DEVICE_CLASS(klass) OBJECT_CLASS_CHECK(DeviceClass, (klass), TYPE_DEVICE)
  23 #define DEVICE_GET_CLASS(obj) OBJECT_GET_CLASS(DeviceClass, (obj), TYPE_DEVICE)
  24
  25 typedef int (*qdev_initfn)(DeviceState *dev);
  26 typedef int (*qdev_event)(DeviceState *dev);
  27 typedef void (*qdev_resetfn)(DeviceState *dev);
  28
  29 struct VMStateDescription;
  30
  31 typedef struct DeviceClass {
  32     ObjectClass parent_class;
  33
  34     const char *fw_name;
  35     const char *desc;
  36     Property *props;
  37     int no_user;
  38
  39     /* callbacks */
  40     void (*reset)(DeviceState *dev);
  41
  42     /* device state */
  43     const struct VMStateDescription *vmsd;
  44
  45     /* Private to qdev / bus.  */
  46     qdev_initfn init;
  47     qdev_event unplug;
  48     qdev_event exit;
  49     const char *bus_type;
  50 } DeviceClass;
  51
  52 /* This structure should not be accessed directly.  We declare it here
  53    so that it can be embedded in individual device state structures.  */
  54 struct DeviceState {
  55     Object parent_obj;
  56
  57     const char *id;
  58     enum DevState state;
  59     QemuOpts *opts;
  60     int hotplugged;
  61     BusState *parent_bus;
  62     int num_gpio_out;
  63     qemu_irq *gpio_out;
  64     int num_gpio_in;
  65     qemu_irq *gpio_in;
  66     QLIST_HEAD(, BusState) child_bus;
  67     int num_child_bus;
  68     int instance_id_alias;
  69     int alias_required_for_version;
  70 };
  71
  72 #define TYPE_BUS "bus"
  73 #define BUS(obj) OBJECT_CHECK(BusState, (obj), TYPE_BUS)
  74 #define BUS_CLASS(klass) OBJECT_CLASS_CHECK(BusClass, (klass), TYPE_BUS)
  75 #define BUS_GET_CLASS(obj) OBJECT_GET_CLASS(BusClass, (obj), TYPE_BUS)
  76
  77 struct BusClass {
  78     ObjectClass parent_class;
  79
  80     /* FIXME first arg should be BusState */
  81     void (*print_dev)(Monitor *mon, DeviceState *dev, int indent);
  82     char *(*get_dev_path)(DeviceState *dev);
  83     /*
  84      * This callback is used to create Open Firmware device path in accordance
  85      * with OF spec http://forthworks.com/standards/of1275.pdf. Individual bus
  86      * bindings can be found at http://playground.sun.com/1275/bindings/.
  87      */
  88     char *(*get_fw_dev_path)(DeviceState *dev);
  89     int (*reset)(BusState *bus);
  90 };
  91
  92 typedef struct BusChild {
  93     DeviceState *child;
  94     int index;
  95     QTAILQ_ENTRY(BusChild) sibling;
  96 } BusChild;
  97
  98 /**
  99  * BusState:
 100  */
 101 struct BusState {
 102     Object obj;
 103     DeviceState *parent;
 104     const char *name;
 105     int allow_hotplug;
 106     int max_index;
 107     QTAILQ_HEAD(ChildrenHead, BusChild) children;
 108     QLIST_ENTRY(BusState) sibling;
 109 };
 110
 111 struct Property {
 112     const char   *name;
 113     PropertyInfo *info;
 114     int          offset;
 115     uint8_t      bitnr;
 116     uint8_t      qtype;
 117     int64_t      defval;
 118 };
 119
 120 struct PropertyInfo {
 121     const char *name;
 122     const char *legacy_name;
 123     const char **enum_table;
 124     int (*parse)(DeviceState *dev, Property *prop, const char *str);
 125     int (*print)(DeviceState *dev, Property *prop, char *dest, size_t len);
 126     ObjectPropertyAccessor *get;
 127     ObjectPropertyAccessor *set;
 128     ObjectPropertyRelease *release;
 129 };
 130
 131 typedef struct GlobalProperty {
 132     const char *driver;
 133     const char *property;
 134     const char *value;
 135     QTAILQ_ENTRY(GlobalProperty) next;
 136 } GlobalProperty;
 137
 138 /*** Board API.  This should go away once we have a machine config file.  ***/
 139
 140 DeviceState *qdev_create(BusState *bus, const char *name);
 141 DeviceState *qdev_try_create(BusState *bus, const char *name);
 142 int qdev_init(DeviceState *dev) QEMU_WARN_UNUSED_RESULT;
 143 void qdev_init_nofail(DeviceState *dev);
 144 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
 145                                  int required_for_version);
 146 void qdev_unplug(DeviceState *dev, Error **errp);
 147 void qdev_free(DeviceState *dev);
 148 int qdev_simple_unplug_cb(DeviceState *dev);
 149 void qdev_machine_creation_done(void);
 150 bool qdev_machine_modified(void);
 151
 152 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
 153 void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
 154
 155 BusState *qdev_get_child_bus(DeviceState *dev, const char *name);
 156
 157 /*** Device API.  ***/
 158
 159 /* Register device properties.  */
 160 /* GPIO inputs also double as IRQ sinks.  */
 161 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n);
 162 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n);
 163
 164 BusState *qdev_get_parent_bus(DeviceState *dev);
 165
 166 /*** BUS API. ***/
 167
 168 DeviceState *qdev_find_recursive(BusState *bus, const char *id);
 169
 170 /* Returns 0 to walk children, > 0 to skip walk, < 0 to terminate walk. */
 171 typedef int (qbus_walkerfn)(BusState *bus, void *opaque);
 172 typedef int (qdev_walkerfn)(DeviceState *dev, void *opaque);
 173
 174 void qbus_create_inplace(BusState *bus, const char *typename,
 175                          DeviceState *parent, const char *name);
 176 BusState *qbus_create(const char *typename, DeviceState *parent, const char *name);
 177 /* Returns > 0 if either devfn or busfn skip walk somewhere in cursion,
 178  *         < 0 if either devfn or busfn terminate walk somewhere in cursion,
 179  *           0 otherwise. */
 180 int qbus_walk_children(BusState *bus, qdev_walkerfn *devfn,
 181                        qbus_walkerfn *busfn, void *opaque);
 182 int qdev_walk_children(DeviceState *dev, qdev_walkerfn *devfn,
 183                        qbus_walkerfn *busfn, void *opaque);
 184 void qdev_reset_all(DeviceState *dev);
 185 void qbus_reset_all_fn(void *opaque);
 186
 187 void qbus_free(BusState *bus);
 188
 189 #define FROM_QBUS(type, dev) DO_UPCAST(type, qbus, dev)
 190
 191 /* This should go away once we get rid of the NULL bus hack */
 192 BusState *sysbus_get_default(void);
 193
 194 char *qdev_get_fw_dev_path(DeviceState *dev);
 195
 196 /**
 197  * @qdev_machine_init
 198  *
 199  * Initialize platform devices before machine init.  This is a hack until full
 200  * support for composition is added.
 201  */
 202 void qdev_machine_init(void);
 203
 204 /**
 205  * @device_reset
 206  *
 207  * Reset a single device (by calling the reset method).
 208  */
 209 void device_reset(DeviceState *dev);
 210
 211 const struct VMStateDescription *qdev_get_vmsd(DeviceState *dev);
 212
 213 const char *qdev_fw_name(DeviceState *dev);
 214
 215 Object *qdev_get_machine(void);
 216
 217 /* FIXME: make this a link<> */
 218 void qdev_set_parent_bus(DeviceState *dev, BusState *bus);
 219
 220 extern int qdev_hotplug;
 221
 222 char *qdev_get_dev_path(DeviceState *dev);
 223
 224 #endif