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