hw/xen_backend.h

   1 #ifndef QEMU_HW_XEN_BACKEND_H
   2 #define QEMU_HW_XEN_BACKEND_H 1
   3
   4 #include "xen_common.h"
   5 #include "sysemu.h"
   6 #include "net.h"
   7
   8 /* ------------------------------------------------------------- */
   9
  10 #define XEN_BUFSIZE 1024
  11
  12 struct 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
  19 struct XenDevOps {
  20     size_t    size;
  21     uint32_t  flags;
  22     void      (*alloc)(struct XenDevice *xendev);
  23     int       (*init)(struct XenDevice *xendev);
  24     int       (*connect)(struct XenDevice *xendev);
  25     void      (*event)(struct XenDevice *xendev);
  26     void      (*disconnect)(struct XenDevice *xendev);
  27     int       (*free)(struct XenDevice *xendev);
  28     void      (*backend_changed)(struct XenDevice *xendev, const char *node);
  29     void      (*frontend_changed)(struct XenDevice *xendev, const char *node);
  30 };
  31
  32 struct XenDevice {
  33     const char         *type;
  34     int                dom;
  35     int                dev;
  36     char               name[64];
  37     int                debug;
  38
  39     enum xenbus_state  be_state;
  40     enum xenbus_state  fe_state;
  41     int                online;
  42     char               be[XEN_BUFSIZE];
  43     char               *fe;
  44     char               *protocol;
  45     int                remote_port;
  46     int                local_port;
  47
  48     int                evtchndev;
  49     int                gnttabdev;
  50
  51     struct XenDevOps   *ops;
  52     QTAILQ_ENTRY(XenDevice) next;
  53 };
  54
  55 /* ------------------------------------------------------------- */
  56
  57 /* variables */
  58 extern int xen_xc;
  59 extern struct xs_handle *xenstore;
  60 extern const char *xen_protocol;
  61
  62 /* xenstore helper functions */
  63 int xenstore_write_str(const char *base, const char *node, const char *val);
  64 int xenstore_write_int(const char *base, const char *node, int ival);
  65 char *xenstore_read_str(const char *base, const char *node);
  66 int xenstore_read_int(const char *base, const char *node, int *ival);
  67
  68 int xenstore_write_be_str(struct XenDevice *xendev, const char *node, const char *val);
  69 int xenstore_write_be_int(struct XenDevice *xendev, const char *node, int ival);
  70 char *xenstore_read_be_str(struct XenDevice *xendev, const char *node);
  71 int xenstore_read_be_int(struct XenDevice *xendev, const char *node, int *ival);
  72 char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node);
  73 int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival);
  74
  75 const char *xenbus_strstate(enum xenbus_state state);
  76 struct XenDevice *xen_be_find_xendev(const char *type, int dom, int dev);
  77 void xen_be_check_state(struct XenDevice *xendev);
  78
  79 /* xen backend driver bits */
  80 int xen_be_init(void);
  81 int xen_be_register(const char *type, struct XenDevOps *ops);
  82 int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state);
  83 int xen_be_bind_evtchn(struct XenDevice *xendev);
  84 void xen_be_unbind_evtchn(struct XenDevice *xendev);
  85 int xen_be_send_notify(struct XenDevice *xendev);
  86 void xen_be_printf(struct XenDevice *xendev, int msg_level, const char *fmt, ...)
  87     __attribute__ ((format(printf, 3, 4)));
  88
  89 /* actual backend drivers */
  90 extern struct XenDevOps xen_console_ops;      /* xen_console.c     */
  91 extern struct XenDevOps xen_kbdmouse_ops;     /* xen_framebuffer.c */
  92 extern struct XenDevOps xen_framebuffer_ops;  /* xen_framebuffer.c */
  93 extern struct XenDevOps xen_blkdev_ops;       /* xen_disk.c        */
  94 extern struct XenDevOps xen_netdev_ops;       /* xen_nic.c         */
  95
  96 void xen_init_display(int domid);
  97
  98 /* configuration (aka xenbus setup) */
  99 void xen_config_cleanup(void);
 100 int xen_config_dev_blk(DriveInfo *disk);
 101 int xen_config_dev_nic(NICInfo *nic);
 102 int xen_config_dev_vfb(int vdev, const char *type);
 103 int xen_config_dev_vkbd(int vdev);
 104 int xen_config_dev_console(int vdev);
 105
 106 #endif /* QEMU_HW_XEN_BACKEND_H */