LXR qemu/include/hw/xen/xen

   1#ifndef QEMU_HW_XEN_BACKEND_H
   2#define QEMU_HW_XEN_BACKEND_H 1
   3
   4#include "hw/xen/xen_common.h"
   5#include "sysemu/sysemu.h"
   6#include "net/net.h"
   7
   8/* ------------------------------------------------------------- */
   9
  10#define XEN_BUFSIZE 1024
  11
  12struct XenDevice;
  13
  14/* driver uses grant tables  ->  open gntdev device (xendev->gnttabdev) */
  15#define DEVOPS_FLAG_NEED_GNTDEV   1
  16/* don't expect frontend doing correct state transitions (aka console quirk) */
  17#define DEVOPS_FLAG_IGNORE_STATE  2
  18
  19struct XenDevOps {
  20    size_t    size;
  21    uint32_t  flags;
  22    void      (*alloc)(struct XenDevice *xendev);
  23    int       (*init)(struct XenDevice *xendev);
  24    int       (*initialise)(struct XenDevice *xendev);
  25    void      (*connected)(struct XenDevice *xendev);
  26    void      (*event)(struct XenDevice *xendev);
  27    void      (*disconnect)(struct XenDevice *xendev);
  28    int       (*free)(struct XenDevice *xendev);
  29    void      (*backend_changed)(struct XenDevice *xendev, const char *node);
  30    void      (*frontend_changed)(struct XenDevice *xendev, const char *node);
  31};
  32
  33struct XenDevice {
  34    const char         *type;
  35    int                dom;
  36    int                dev;
  37    char               name[64];
  38    int                debug;
  39
  40    enum xenbus_state  be_state;
  41    enum xenbus_state  fe_state;
  42    int                online;
  43    char               be[XEN_BUFSIZE];
  44    char               *fe;
  45    char               *protocol;
  46    int                remote_port;
  47    int                local_port;
  48
  49    xenevtchn_handle   *evtchndev;
  50    xengnttab_handle   *gnttabdev;
  51
  52    struct XenDevOps   *ops;
  53    QTAILQ_ENTRY(XenDevice) next;
  54};
  55
  56/* ------------------------------------------------------------- */
  57
  58/* variables */
  59extern xc_interface *xen_xc;
  60extern xenforeignmemory_handle *xen_fmem;
  61extern struct xs_handle *xenstore;
  62extern const char *xen_protocol;
  63
  64/* xenstore helper functions */
  65int xenstore_write_str(const char *base, const char *node, const char *val);
  66int xenstore_write_int(const char *base, const char *node, int ival);
  67int xenstore_write_int64(const char *base, const char *node, int64_t ival);
  68char *xenstore_read_str(const char *base, const char *node);
  69int xenstore_read_int(const char *base, const char *node, int *ival);
  70
  71int xenstore_write_be_str(struct XenDevice *xendev, const char *node, const char *val);
  72int xenstore_write_be_int(struct XenDevice *xendev, const char *node, int ival);
  73int xenstore_write_be_int64(struct XenDevice *xendev, const char *node, int64_t ival);
  74char *xenstore_read_be_str(struct XenDevice *xendev, const char *node);
  75int xenstore_read_be_int(struct XenDevice *xendev, const char *node, int *ival);
  76char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node);
  77int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival);
  78int xenstore_read_uint64(const char *base, const char *node, uint64_t *uval);
  79int xenstore_read_fe_uint64(struct XenDevice *xendev, const char *node, uint64_t *uval);
  80
  81const char *xenbus_strstate(enum xenbus_state state);
  82struct XenDevice *xen_be_find_xendev(const char *type, int dom, int dev);
  83void xen_be_check_state(struct XenDevice *xendev);
  84
  85/* xen backend driver bits */
  86int xen_be_init(void);
  87int xen_be_register(const char *type, struct XenDevOps *ops);
  88int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state);
  89int xen_be_bind_evtchn(struct XenDevice *xendev);
  90void xen_be_unbind_evtchn(struct XenDevice *xendev);
  91int xen_be_send_notify(struct XenDevice *xendev);
  92void xen_be_printf(struct XenDevice *xendev, int msg_level, const char *fmt, ...)
  93    GCC_FMT_ATTR(3, 4);
  94
  95/* actual backend drivers */
  96extern struct XenDevOps xen_console_ops;      /* xen_console.c     */
  97extern struct XenDevOps xen_kbdmouse_ops;     /* xen_framebuffer.c */
  98extern struct XenDevOps xen_framebuffer_ops;  /* xen_framebuffer.c */
  99extern struct XenDevOps xen_blkdev_ops;       /* xen_disk.c        */
 100extern struct XenDevOps xen_netdev_ops;       /* xen_nic.c         */
 101
 102void xen_init_display(int domid);
 103
 104/* configuration (aka xenbus setup) */
 105void xen_config_cleanup(void);
 106int xen_config_dev_blk(DriveInfo *disk);
 107int xen_config_dev_nic(NICInfo *nic);
 108int xen_config_dev_vfb(int vdev, const char *type);
 109int xen_config_dev_vkbd(int vdev);
 110int xen_config_dev_console(int vdev);
 111
 112#endif /* QEMU_HW_XEN_BACKEND_H */
 113