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     const char *name;
  17     DeviceType *type;
  18     BusState *parent_bus;
  19     DeviceProperty *props;
  20     int num_irq_sink;
  21     qemu_irq *irq_sink;
  22     int num_gpio_out;
  23     qemu_irq *gpio_out;
  24     int num_gpio_in;
  25     qemu_irq *gpio_in;
  26     LIST_HEAD(, BusState) child_bus;
  27     NICInfo *nd;
  28     LIST_ENTRY(DeviceState) sibling;
  29 };
  30
  31 typedef enum {
  32     BUS_TYPE_SYSTEM,
  33     BUS_TYPE_PCI,
  34     BUS_TYPE_SCSI,
  35     BUS_TYPE_I2C,
  36     BUS_TYPE_SSI
  37 } BusType;
  38
  39 struct BusState {
  40     DeviceState *parent;
  41     const char *name;
  42     BusType type;
  43     LIST_HEAD(, DeviceState) children;
  44     LIST_ENTRY(BusState) sibling;
  45 };
  46
  47 /*** Board API.  This should go away once we have a machine config file.  ***/
  48
  49 DeviceState *qdev_create(BusState *bus, const char *name);
  50 void qdev_init(DeviceState *dev);
  51 void qdev_free(DeviceState *dev);
  52
  53 /* Set properties between creation and init.  */
  54 void qdev_set_prop_int(DeviceState *dev, const char *name, uint64_t value);
  55 void qdev_set_prop_ptr(DeviceState *dev, const char *name, void *value);
  56 void qdev_set_netdev(DeviceState *dev, NICInfo *nd);
  57
  58 qemu_irq qdev_get_irq_sink(DeviceState *dev, int n);
  59 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
  60 void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
  61
  62 BusState *qdev_get_child_bus(DeviceState *dev, const char *name);
  63
  64 /*** Device API.  ***/
  65
  66 typedef struct DeviceInfo DeviceInfo;
  67
  68 typedef void (*qdev_initfn)(DeviceState *dev, DeviceInfo *info);
  69 typedef void (*SCSIAttachFn)(DeviceState *host, BlockDriverState *bdrv,
  70               int unit);
  71
  72 struct DeviceInfo {
  73     qdev_initfn init;
  74     BusType bus_type;
  75 };
  76
  77 void qdev_register(const char *name, int size, DeviceInfo *info);
  78
  79 /* Register device properties.  */
  80 void qdev_init_irq_sink(DeviceState *dev, qemu_irq_handler handler, int nirq);
  81 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n);
  82 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n);
  83
  84 void scsi_bus_new(DeviceState *host, SCSIAttachFn attach);
  85
  86 CharDriverState *qdev_init_chardev(DeviceState *dev);
  87
  88 BusState *qdev_get_parent_bus(DeviceState *dev);
  89 uint64_t qdev_get_prop_int(DeviceState *dev, const char *name, uint64_t def);
  90 void *qdev_get_prop_ptr(DeviceState *dev, const char *name);
  91
  92 /* Convery from a base type to a parent type, with compile time checking.  */
  93 #ifdef __GNUC__
  94 #define DO_UPCAST(type, field, dev) ( __extension__ ( { \
  95     char __attribute__((unused)) offset_must_be_zero[ \
  96         -offsetof(type, field)]; \
  97     container_of(dev, type, field);}))
  98 #else
  99 #define DO_UPCAST(type, field, dev) container_of(dev, type, field)
 100 #endif
 101
 102 /*** BUS API. ***/
 103
 104 BusState *qbus_create(BusType type, size_t size,
 105                       DeviceState *parent, const char *name);
 106
 107 #define FROM_QBUS(type, dev) DO_UPCAST(type, qbus, dev)
 108
 109 #endif