include/hw/xen/xen_backend.h

   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
  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       (*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
  33 struct 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 */
  59 extern XenXC xen_xc;
  60 extern xenforeignmemory_handle *xen_fmem;
  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 int xenstore_write_int64(const char *base, const char *node, int64_t ival);
  68 char *xenstore_read_str(const char *base, const char *node);
  69 int xenstore_read_int(const char *base, const char *node, int *ival);
  70
  71 int xenstore_write_be_str(struct XenDevice *xendev, const char *node, const char *val);
  72 int xenstore_write_be_int(struct XenDevice *xendev, const char *node, int ival);
  73 int xenstore_write_be_int64(struct XenDevice *xendev, const char *node, int64_t ival);
  74 char *xenstore_read_be_str(struct XenDevice *xendev, const char *node);
  75 int xenstore_read_be_int(struct XenDevice *xendev, const char *node, int *ival);
  76 char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node);
  77 int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival);
  78 int xenstore_read_uint64(const char *base, const char *node, uint64_t *uval);
  79 int xenstore_read_fe_uint64(struct XenDevice *xendev, const char *node, uint64_t *uval);
  80
  81 const char *xenbus_strstate(enum xenbus_state state);
  82 struct XenDevice *xen_be_find_xendev(const char *type, int dom, int dev);
  83 void xen_be_check_state(struct XenDevice *xendev);
  84
  85 /* xen backend driver bits */
  86 int xen_be_init(void);
  87 int xen_be_register(const char *type, struct XenDevOps *ops);
  88 int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state);
  89 int xen_be_bind_evtchn(struct XenDevice *xendev);
  90 void xen_be_unbind_evtchn(struct XenDevice *xendev);
  91 int xen_be_send_notify(struct XenDevice *xendev);
  92 void xen_be_printf(struct XenDevice *xendev, int msg_level, const char *fmt, ...)
  93     GCC_FMT_ATTR(3, 4);
  94
  95 /* actual backend drivers */
  96 extern struct XenDevOps xen_console_ops;      /* xen_console.c     */
  97 extern struct XenDevOps xen_kbdmouse_ops;     /* xen_framebuffer.c */
  98 extern struct XenDevOps xen_framebuffer_ops;  /* xen_framebuffer.c */
  99 extern struct XenDevOps xen_blkdev_ops;       /* xen_disk.c        */
 100 extern struct XenDevOps xen_netdev_ops;       /* xen_nic.c         */
 101
 102 void xen_init_display(int domid);
 103
 104 /* configuration (aka xenbus setup) */
 105 void xen_config_cleanup(void);
 106 int xen_config_dev_blk(DriveInfo *disk);
 107 int xen_config_dev_nic(NICInfo *nic);
 108 int xen_config_dev_vfb(int vdev, const char *type);
 109 int xen_config_dev_vkbd(int vdev);
 110 int xen_config_dev_console(int vdev);
 111
 112 #endif /* QEMU_HW_XEN_BACKEND_H */