hw/qdev.h

   1 #ifndef QDEV_H
   2 #define QDEV_H
   3
   4 #include "hw.h"
   5 #include "sys-queue.h"
   6
   7 typedef struct DeviceType DeviceType;
   8
   9 typedef struct DeviceProperty DeviceProperty;
  10
  11 typedef struct BusState BusState;
  12
  13 /* This structure should not be accessed directly.  We declare it here
  14    so that it can be embedded in individual device state structures.  */
  15 struct DeviceState {
  16     DeviceType *type;
  17     BusState *parent_bus;
  18     DeviceProperty *props;
  19     int num_gpio_out;
  20     qemu_irq *gpio_out;
  21     int num_gpio_in;
  22     qemu_irq *gpio_in;
  23     LIST_HEAD(, BusState) child_bus;
  24     NICInfo *nd;
  25     LIST_ENTRY(DeviceState) sibling;
  26 };
  27
  28 typedef enum {
  29     BUS_TYPE_SYSTEM,
  30     BUS_TYPE_PCI,
  31     BUS_TYPE_SCSI,
  32     BUS_TYPE_I2C,
  33     BUS_TYPE_SSI
  34 } BusType;
  35
  36 struct BusState {
  37     DeviceState *parent;
  38     const char *name;
  39     BusType type;
  40     LIST_HEAD(, DeviceState) children;
  41     LIST_ENTRY(BusState) sibling;
  42 };
  43
  44 /*** Board API.  This should go away once we have a machine config file.  ***/
  45
  46 DeviceState *qdev_create(BusState *bus, const char *name);
  47 void qdev_init(DeviceState *dev);
  48 void qdev_free(DeviceState *dev);
  49
  50 /* Set properties between creation and init.  */
  51 void qdev_set_prop_int(DeviceState *dev, const char *name, uint64_t value);
  52 void qdev_set_prop_ptr(DeviceState *dev, const char *name, void *value);
  53 void qdev_set_netdev(DeviceState *dev, NICInfo *nd);
  54
  55 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
  56 void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
  57
  58 BusState *qdev_get_child_bus(DeviceState *dev, const char *name);
  59
  60 /*** Device API.  ***/
  61
  62 typedef struct DeviceInfo DeviceInfo;
  63
  64 typedef void (*qdev_initfn)(DeviceState *dev, DeviceInfo *info);
  65 typedef void (*SCSIAttachFn)(DeviceState *host, BlockDriverState *bdrv,
  66               int unit);
  67
  68 struct DeviceInfo {
  69     qdev_initfn init;
  70     BusType bus_type;
  71 };
  72
  73 void qdev_register(const char *name, int size, DeviceInfo *info);
  74
  75 /* Register device properties.  */
  76 /* GPIO inputs also double as IRQ sinks.  */
  77 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n);
  78 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n);
  79
  80 void scsi_bus_new(DeviceState *host, SCSIAttachFn attach);
  81
  82 CharDriverState *qdev_init_chardev(DeviceState *dev);
  83
  84 BusState *qdev_get_parent_bus(DeviceState *dev);
  85 uint64_t qdev_get_prop_int(DeviceState *dev, const char *name, uint64_t def);
  86 void *qdev_get_prop_ptr(DeviceState *dev, const char *name);
  87
  88 /* Convery from a base type to a parent type, with compile time checking.  */
  89 #ifdef __GNUC__
  90 #define DO_UPCAST(type, field, dev) ( __extension__ ( { \
  91     char __attribute__((unused)) offset_must_be_zero[ \
  92         -offsetof(type, field)]; \
  93     container_of(dev, type, field);}))
  94 #else
  95 #define DO_UPCAST(type, field, dev) container_of(dev, type, field)
  96 #endif
  97
  98 /*** BUS API. ***/
  99
 100 BusState *qbus_create(BusType type, size_t size,
 101                       DeviceState *parent, const char *name);
 102
 103 #define FROM_QBUS(type, dev) DO_UPCAST(type, qbus, dev)
 104
 105 #endif