hw/qdev.h

   1 #ifndef QDEV_H
   2 #define QDEV_H
   3
   4 #include "hw.h"
   5 #include "qemu-queue.h"
   6 #include "qemu-char.h"
   7 #include "qemu-option.h"
   8 #include "qapi/qapi-visit-core.h"
   9 #include "qemu/object.h"
  10 #include "error.h"
  11
  12 typedef struct Property Property;
  13
  14 typedef struct PropertyInfo PropertyInfo;
  15
  16 typedef struct CompatProperty CompatProperty;
  17
  18 typedef struct BusState BusState;
  19
  20 typedef struct BusInfo BusInfo;
  21
  22 enum DevState {
  23     DEV_STATE_CREATED = 1,
  24     DEV_STATE_INITIALIZED,
  25 };
  26
  27 enum {
  28     DEV_NVECTORS_UNSPECIFIED = -1,
  29 };
  30
  31 #define TYPE_DEVICE "device"
  32 #define DEVICE(obj) OBJECT_CHECK(DeviceState, (obj), TYPE_DEVICE)
  33 #define DEVICE_CLASS(klass) OBJECT_CLASS_CHECK(DeviceClass, (klass), TYPE_DEVICE)
  34 #define DEVICE_GET_CLASS(obj) OBJECT_GET_CLASS(DeviceClass, (obj), TYPE_DEVICE)
  35
  36 typedef int (*qdev_initfn)(DeviceState *dev);
  37 typedef int (*qdev_event)(DeviceState *dev);
  38 typedef void (*qdev_resetfn)(DeviceState *dev);
  39
  40 typedef struct DeviceClass {
  41     ObjectClass parent_class;
  42
  43     const char *fw_name;
  44     const char *desc;
  45     Property *props;
  46     int no_user;
  47
  48     /* callbacks */
  49     void (*reset)(DeviceState *dev);
  50
  51     /* device state */
  52     const VMStateDescription *vmsd;
  53
  54     /* Private to qdev / bus.  */
  55     qdev_initfn init;
  56     qdev_event unplug;
  57     qdev_event exit;
  58     BusInfo *bus_info;
  59 } DeviceClass;
  60
  61 /* This structure should not be accessed directly.  We declare it here
  62    so that it can be embedded in individual device state structures.  */
  63 struct DeviceState {
  64     Object parent_obj;
  65
  66     const char *id;
  67     enum DevState state;
  68     QemuOpts *opts;
  69     int hotplugged;
  70     BusState *parent_bus;
  71     int num_gpio_out;
  72     qemu_irq *gpio_out;
  73     int num_gpio_in;
  74     qemu_irq *gpio_in;
  75     QLIST_HEAD(, BusState) child_bus;
  76     int num_child_bus;
  77     QTAILQ_ENTRY(DeviceState) sibling;
  78     int instance_id_alias;
  79     int alias_required_for_version;
  80 };
  81
  82 typedef void (*bus_dev_printfn)(Monitor *mon, DeviceState *dev, int indent);
  83 typedef char *(*bus_get_dev_path)(DeviceState *dev);
  84 /*
  85  * This callback is used to create Open Firmware device path in accordance with
  86  * OF spec http://forthworks.com/standards/of1275.pdf. Indicidual bus bindings
  87  * can be found here http://playground.sun.com/1275/bindings/.
  88  */
  89 typedef char *(*bus_get_fw_dev_path)(DeviceState *dev);
  90 typedef int (qbus_resetfn)(BusState *bus);
  91
  92 struct BusInfo {
  93     const char *name;
  94     size_t size;
  95     bus_dev_printfn print_dev;
  96     bus_get_dev_path get_dev_path;
  97     bus_get_fw_dev_path get_fw_dev_path;
  98     qbus_resetfn *reset;
  99 };
 100
 101 struct BusState {
 102     DeviceState *parent;
 103     BusInfo *info;
 104     const char *name;
 105     int allow_hotplug;
 106     int qdev_allocated;
 107     QTAILQ_HEAD(ChildrenHead, DeviceState) 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 bool qdev_exists(const char *name);
 143 int qdev_device_help(QemuOpts *opts);
 144 DeviceState *qdev_device_add(QemuOpts *opts);
 145 int qdev_init(DeviceState *dev) QEMU_WARN_UNUSED_RESULT;
 146 void qdev_init_nofail(DeviceState *dev);
 147 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
 148                                  int required_for_version);
 149 void qdev_unplug(DeviceState *dev, Error **errp);
 150 void qdev_free(DeviceState *dev);
 151 int qdev_simple_unplug_cb(DeviceState *dev);
 152 void qdev_machine_creation_done(void);
 153 bool qdev_machine_modified(void);
 154
 155 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
 156 void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
 157
 158 BusState *qdev_get_child_bus(DeviceState *dev, const char *name);
 159
 160 /*** Device API.  ***/
 161
 162 /* Register device properties.  */
 163 /* GPIO inputs also double as IRQ sinks.  */
 164 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n);
 165 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n);
 166
 167 BusState *qdev_get_parent_bus(DeviceState *dev);
 168
 169 /*** BUS API. ***/
 170
 171 DeviceState *qdev_find_recursive(BusState *bus, const char *id);
 172
 173 /* Returns 0 to walk children, > 0 to skip walk, < 0 to terminate walk. */
 174 typedef int (qbus_walkerfn)(BusState *bus, void *opaque);
 175 typedef int (qdev_walkerfn)(DeviceState *dev, void *opaque);
 176
 177 void qbus_create_inplace(BusState *bus, BusInfo *info,
 178                          DeviceState *parent, const char *name);
 179 BusState *qbus_create(BusInfo *info, DeviceState *parent, const char *name);
 180 /* Returns > 0 if either devfn or busfn skip walk somewhere in cursion,
 181  *         < 0 if either devfn or busfn terminate walk somewhere in cursion,
 182  *           0 otherwise. */
 183 int qbus_walk_children(BusState *bus, qdev_walkerfn *devfn,
 184                        qbus_walkerfn *busfn, void *opaque);
 185 int qdev_walk_children(DeviceState *dev, qdev_walkerfn *devfn,
 186                        qbus_walkerfn *busfn, void *opaque);
 187 void qdev_reset_all(DeviceState *dev);
 188 void qbus_reset_all_fn(void *opaque);
 189
 190 void qbus_free(BusState *bus);
 191
 192 #define FROM_QBUS(type, dev) DO_UPCAST(type, qbus, dev)
 193
 194 /* This should go away once we get rid of the NULL bus hack */
 195 BusState *sysbus_get_default(void);
 196
 197 /*** monitor commands ***/
 198
 199 void do_info_qtree(Monitor *mon);
 200 void do_info_qdm(Monitor *mon);
 201 int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data);
 202 int do_device_del(Monitor *mon, const QDict *qdict, QObject **ret_data);
 203
 204 /*** qdev-properties.c ***/
 205
 206 extern PropertyInfo qdev_prop_bit;
 207 extern PropertyInfo qdev_prop_uint8;
 208 extern PropertyInfo qdev_prop_uint16;
 209 extern PropertyInfo qdev_prop_uint32;
 210 extern PropertyInfo qdev_prop_int32;
 211 extern PropertyInfo qdev_prop_uint64;
 212 extern PropertyInfo qdev_prop_hex8;
 213 extern PropertyInfo qdev_prop_hex32;
 214 extern PropertyInfo qdev_prop_hex64;
 215 extern PropertyInfo qdev_prop_string;
 216 extern PropertyInfo qdev_prop_chr;
 217 extern PropertyInfo qdev_prop_ptr;
 218 extern PropertyInfo qdev_prop_macaddr;
 219 extern PropertyInfo qdev_prop_losttickpolicy;
 220 extern PropertyInfo qdev_prop_drive;
 221 extern PropertyInfo qdev_prop_netdev;
 222 extern PropertyInfo qdev_prop_vlan;
 223 extern PropertyInfo qdev_prop_pci_devfn;
 224 extern PropertyInfo qdev_prop_blocksize;
 225
 226 #define DEFINE_PROP(_name, _state, _field, _prop, _type) { \
 227         .name      = (_name),                                    \
 228         .info      = &(_prop),                                   \
 229         .offset    = offsetof(_state, _field)                    \
 230             + type_check(_type,typeof_field(_state, _field)),    \
 231         }
 232 #define DEFINE_PROP_DEFAULT(_name, _state, _field, _defval, _prop, _type) { \
 233         .name      = (_name),                                           \
 234         .info      = &(_prop),                                          \
 235         .offset    = offsetof(_state, _field)                           \
 236             + type_check(_type,typeof_field(_state, _field)),           \
 237         .qtype     = QTYPE_QINT,                                        \
 238         .defval    = (_type)_defval,                                    \
 239         }
 240 #define DEFINE_PROP_BIT(_name, _state, _field, _bit, _defval) {  \
 241         .name      = (_name),                                    \
 242         .info      = &(qdev_prop_bit),                           \
 243         .bitnr    = (_bit),                                      \
 244         .offset    = offsetof(_state, _field)                    \
 245             + type_check(uint32_t,typeof_field(_state, _field)), \
 246         .qtype     = QTYPE_QBOOL,                                \
 247         .defval    = (bool)_defval,                              \
 248         }
 249
 250 #define DEFINE_PROP_UINT8(_n, _s, _f, _d)                       \
 251     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint8, uint8_t)
 252 #define DEFINE_PROP_UINT16(_n, _s, _f, _d)                      \
 253     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint16, uint16_t)
 254 #define DEFINE_PROP_UINT32(_n, _s, _f, _d)                      \
 255     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint32, uint32_t)
 256 #define DEFINE_PROP_INT32(_n, _s, _f, _d)                      \
 257     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_int32, int32_t)
 258 #define DEFINE_PROP_UINT64(_n, _s, _f, _d)                      \
 259     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint64, uint64_t)
 260 #define DEFINE_PROP_HEX8(_n, _s, _f, _d)                       \
 261     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex8, uint8_t)
 262 #define DEFINE_PROP_HEX32(_n, _s, _f, _d)                       \
 263     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex32, uint32_t)
 264 #define DEFINE_PROP_HEX64(_n, _s, _f, _d)                       \
 265     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex64, uint64_t)
 266 #define DEFINE_PROP_PCI_DEVFN(_n, _s, _f, _d)                   \
 267     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_pci_devfn, int32_t)
 268
 269 #define DEFINE_PROP_PTR(_n, _s, _f)             \
 270     DEFINE_PROP(_n, _s, _f, qdev_prop_ptr, void*)
 271 #define DEFINE_PROP_CHR(_n, _s, _f)             \
 272     DEFINE_PROP(_n, _s, _f, qdev_prop_chr, CharDriverState*)
 273 #define DEFINE_PROP_STRING(_n, _s, _f)             \
 274     DEFINE_PROP(_n, _s, _f, qdev_prop_string, char*)
 275 #define DEFINE_PROP_NETDEV(_n, _s, _f)             \
 276     DEFINE_PROP(_n, _s, _f, qdev_prop_netdev, VLANClientState*)
 277 #define DEFINE_PROP_VLAN(_n, _s, _f)             \
 278     DEFINE_PROP(_n, _s, _f, qdev_prop_vlan, VLANState*)
 279 #define DEFINE_PROP_DRIVE(_n, _s, _f) \
 280     DEFINE_PROP(_n, _s, _f, qdev_prop_drive, BlockDriverState *)
 281 #define DEFINE_PROP_MACADDR(_n, _s, _f)         \
 282     DEFINE_PROP(_n, _s, _f, qdev_prop_macaddr, MACAddr)
 283 #define DEFINE_PROP_LOSTTICKPOLICY(_n, _s, _f, _d) \
 284     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_losttickpolicy, \
 285                         LostTickPolicy)
 286 #define DEFINE_PROP_BLOCKSIZE(_n, _s, _f, _d) \
 287     DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_blocksize, uint16_t)
 288
 289 #define DEFINE_PROP_END_OF_LIST()               \
 290     {}
 291
 292 /* Set properties between creation and init.  */
 293 void *qdev_get_prop_ptr(DeviceState *dev, Property *prop);
 294 int qdev_prop_exists(DeviceState *dev, const char *name);
 295 int qdev_prop_parse(DeviceState *dev, const char *name, const char *value);
 296 void qdev_prop_set_bit(DeviceState *dev, const char *name, bool value);
 297 void qdev_prop_set_uint8(DeviceState *dev, const char *name, uint8_t value);
 298 void qdev_prop_set_uint16(DeviceState *dev, const char *name, uint16_t value);
 299 void qdev_prop_set_uint32(DeviceState *dev, const char *name, uint32_t value);
 300 void qdev_prop_set_int32(DeviceState *dev, const char *name, int32_t value);
 301 void qdev_prop_set_uint64(DeviceState *dev, const char *name, uint64_t value);
 302 void qdev_prop_set_string(DeviceState *dev, const char *name, char *value);
 303 void qdev_prop_set_chr(DeviceState *dev, const char *name, CharDriverState *value);
 304 void qdev_prop_set_netdev(DeviceState *dev, const char *name, VLANClientState *value);
 305 void qdev_prop_set_vlan(DeviceState *dev, const char *name, VLANState *value);
 306 int qdev_prop_set_drive(DeviceState *dev, const char *name, BlockDriverState *value) QEMU_WARN_UNUSED_RESULT;
 307 void qdev_prop_set_drive_nofail(DeviceState *dev, const char *name, BlockDriverState *value);
 308 void qdev_prop_set_macaddr(DeviceState *dev, const char *name, uint8_t *value);
 309 void qdev_prop_set_enum(DeviceState *dev, const char *name, int value);
 310 /* FIXME: Remove opaque pointer properties.  */
 311 void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value);
 312 void qdev_prop_set_defaults(DeviceState *dev, Property *props);
 313
 314 void qdev_prop_register_global_list(GlobalProperty *props);
 315 void qdev_prop_set_globals(DeviceState *dev);
 316 void error_set_from_qdev_prop_error(Error **errp, int ret, DeviceState *dev,
 317                                     Property *prop, const char *value);
 318
 319 char *qdev_get_fw_dev_path(DeviceState *dev);
 320
 321 /* This is a nasty hack to allow passing a NULL bus to qdev_create.  */
 322 extern struct BusInfo system_bus_info;
 323
 324 /**
 325  * @qdev_property_add_static - add a @Property to a device referencing a
 326  * field in a struct.
 327  */
 328 void qdev_property_add_static(DeviceState *dev, Property *prop, Error **errp);
 329
 330 /**
 331  * @qdev_machine_init
 332  *
 333  * Initialize platform devices before machine init.  This is a hack until full
 334  * support for composition is added.
 335  */
 336 void qdev_machine_init(void);
 337
 338 /**
 339  * @device_reset
 340  *
 341  * Reset a single device (by calling the reset method).
 342  */
 343 void device_reset(DeviceState *dev);
 344
 345 const VMStateDescription *qdev_get_vmsd(DeviceState *dev);
 346
 347 const char *qdev_fw_name(DeviceState *dev);
 348
 349 Object *qdev_get_machine(void);
 350
 351 /* FIXME: make this a link<> */
 352 void qdev_set_parent_bus(DeviceState *dev, BusState *bus);
 353
 354 extern int qdev_hotplug;
 355
 356 #endif