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Commit | Line | Data |
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108f7bba PD |
1 | /* |
2 | * Copyright (c) 2018 Citrix Systems Inc. | |
3 | * | |
4 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
5 | * See the COPYING file in the top-level directory. | |
6 | */ | |
7 | ||
8 | #ifndef HW_XEN_BUS_H | |
9 | #define HW_XEN_BUS_H | |
10 | ||
094a2239 | 11 | #include "hw/xen/xen_common.h" |
108f7bba | 12 | #include "hw/sysbus.h" |
82a29e30 | 13 | #include "qemu/notify.h" |
db1015e9 | 14 | #include "qom/object.h" |
82a29e30 PD |
15 | |
16 | typedef void (*XenWatchHandler)(void *opaque); | |
17 | ||
374752a2 | 18 | typedef struct XenWatchList XenWatchList; |
82a29e30 | 19 | typedef struct XenWatch XenWatch; |
c0b336ea | 20 | typedef struct XenEventChannel XenEventChannel; |
108f7bba | 21 | |
db1015e9 | 22 | struct XenDevice { |
108f7bba | 23 | DeviceState qdev; |
094a2239 PD |
24 | domid_t frontend_id; |
25 | char *name; | |
d198b711 PD |
26 | struct xs_handle *xsh; |
27 | XenWatchList *watch_list; | |
094a2239 PD |
28 | char *backend_path, *frontend_path; |
29 | enum xenbus_state backend_state, frontend_state; | |
30 | Notifier exit; | |
b6af8926 PD |
31 | XenWatch *backend_state_watch, *frontend_state_watch; |
32 | bool backend_online; | |
33 | XenWatch *backend_online_watch; | |
4b34b5b1 PD |
34 | xengnttab_handle *xgth; |
35 | bool feature_grant_copy; | |
3809f758 | 36 | bool inactive; |
c0b336ea | 37 | QLIST_HEAD(, XenEventChannel) event_channels; |
3809f758 | 38 | QLIST_ENTRY(XenDevice) list; |
db1015e9 EH |
39 | }; |
40 | typedef struct XenDevice XenDevice; | |
108f7bba | 41 | |
094a2239 | 42 | typedef char *(*XenDeviceGetName)(XenDevice *xendev, Error **errp); |
108f7bba | 43 | typedef void (*XenDeviceRealize)(XenDevice *xendev, Error **errp); |
82a29e30 PD |
44 | typedef void (*XenDeviceFrontendChanged)(XenDevice *xendev, |
45 | enum xenbus_state frontend_state, | |
46 | Error **errp); | |
b69c3c21 | 47 | typedef void (*XenDeviceUnrealize)(XenDevice *xendev); |
108f7bba | 48 | |
db1015e9 | 49 | struct XenDeviceClass { |
108f7bba PD |
50 | /*< private >*/ |
51 | DeviceClass parent_class; | |
52 | /*< public >*/ | |
094a2239 PD |
53 | const char *backend; |
54 | const char *device; | |
55 | XenDeviceGetName get_name; | |
108f7bba | 56 | XenDeviceRealize realize; |
82a29e30 | 57 | XenDeviceFrontendChanged frontend_changed; |
108f7bba | 58 | XenDeviceUnrealize unrealize; |
db1015e9 | 59 | }; |
108f7bba PD |
60 | |
61 | #define TYPE_XEN_DEVICE "xen-device" | |
a489d195 | 62 | OBJECT_DECLARE_TYPE(XenDevice, XenDeviceClass, XEN_DEVICE) |
108f7bba | 63 | |
db1015e9 | 64 | struct XenBus { |
108f7bba | 65 | BusState qbus; |
094a2239 PD |
66 | domid_t backend_id; |
67 | struct xs_handle *xsh; | |
374752a2 | 68 | XenWatchList *watch_list; |
a783f8ad | 69 | XenWatch *backend_watch; |
3809f758 | 70 | QLIST_HEAD(, XenDevice) inactive_devices; |
db1015e9 | 71 | }; |
108f7bba | 72 | |
db1015e9 | 73 | struct XenBusClass { |
108f7bba PD |
74 | /*< private >*/ |
75 | BusClass parent_class; | |
db1015e9 | 76 | }; |
108f7bba PD |
77 | |
78 | #define TYPE_XEN_BUS "xen-bus" | |
c821774a | 79 | OBJECT_DECLARE_TYPE(XenBus, XenBusClass, |
30b5707c | 80 | XEN_BUS) |
108f7bba PD |
81 | |
82 | void xen_bus_init(void); | |
83 | ||
82a29e30 PD |
84 | void xen_device_backend_set_state(XenDevice *xendev, |
85 | enum xenbus_state state); | |
86 | enum xenbus_state xen_device_backend_get_state(XenDevice *xendev); | |
87 | ||
b6af8926 PD |
88 | void xen_device_backend_printf(XenDevice *xendev, const char *key, |
89 | const char *fmt, ...) | |
90 | GCC_FMT_ATTR(3, 4); | |
91 | void xen_device_frontend_printf(XenDevice *xendev, const char *key, | |
92 | const char *fmt, ...) | |
93 | GCC_FMT_ATTR(3, 4); | |
94 | ||
95 | int xen_device_frontend_scanf(XenDevice *xendev, const char *key, | |
96 | const char *fmt, ...); | |
97 | ||
4b34b5b1 PD |
98 | void xen_device_set_max_grant_refs(XenDevice *xendev, unsigned int nr_refs, |
99 | Error **errp); | |
100 | void *xen_device_map_grant_refs(XenDevice *xendev, uint32_t *refs, | |
101 | unsigned int nr_refs, int prot, | |
102 | Error **errp); | |
103 | void xen_device_unmap_grant_refs(XenDevice *xendev, void *map, | |
104 | unsigned int nr_refs, Error **errp); | |
105 | ||
106 | typedef struct XenDeviceGrantCopySegment { | |
107 | union { | |
108 | void *virt; | |
109 | struct { | |
110 | uint32_t ref; | |
111 | off_t offset; | |
112 | } foreign; | |
113 | } source, dest; | |
114 | size_t len; | |
115 | } XenDeviceGrantCopySegment; | |
116 | ||
117 | void xen_device_copy_grant_refs(XenDevice *xendev, bool to_domain, | |
118 | XenDeviceGrantCopySegment segs[], | |
119 | unsigned int nr_segs, Error **errp); | |
120 | ||
345f42b4 | 121 | typedef bool (*XenEventHandler)(void *opaque); |
a3d669c8 PD |
122 | |
123 | XenEventChannel *xen_device_bind_event_channel(XenDevice *xendev, | |
124 | unsigned int port, | |
125 | XenEventHandler handler, | |
126 | void *opaque, Error **errp); | |
32d0b7be PD |
127 | void xen_device_set_event_channel_context(XenDevice *xendev, |
128 | XenEventChannel *channel, | |
129 | AioContext *ctx, | |
130 | Error **errp); | |
a3d669c8 PD |
131 | void xen_device_notify_event_channel(XenDevice *xendev, |
132 | XenEventChannel *channel, | |
133 | Error **errp); | |
134 | void xen_device_unbind_event_channel(XenDevice *xendev, | |
135 | XenEventChannel *channel, | |
136 | Error **errp); | |
137 | ||
108f7bba | 138 | #endif /* HW_XEN_BUS_H */ |