1 | /* $NetBSD: granttables.h,v 1.9 2011/12/07 15:47:42 cegger Exp $ */ |
2 | /* |
3 | * Copyright (c) 2006 Manuel Bouyer. |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
8 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
13 | * |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
15 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
16 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
17 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
19 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
20 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
21 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
23 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
24 | * |
25 | */ |
26 | |
27 | /* Interface to the Xen Grant tables */ |
28 | #include <xen/xen-public/xen.h> |
29 | #include <xen/xen-public/grant_table.h> |
30 | |
31 | void xengnt_init(void); |
32 | |
33 | /* suspend/resume grant table, for save/restore operations */ |
34 | bool xengnt_suspend(void); |
35 | bool xengnt_resume(void); |
36 | |
37 | /* |
38 | * grant access to a remote domain. Returns a handle on the allocated grant |
39 | * entry in table in grant_ref_t *. |
40 | */ |
41 | int xengnt_grant_access(domid_t, paddr_t, int, grant_ref_t *); |
42 | |
43 | /* |
44 | * Revoke access. Caller is responsible to ensure that the grant entry is |
45 | * not referenced any more. |
46 | */ |
47 | void xengnt_revoke_access(grant_ref_t); |
48 | |
49 | /* allow a page transfer from a remote domain */ |
50 | int xengnt_grant_transfer(domid_t, grant_ref_t *); |
51 | |
52 | /* end transfer, return the new page address or 0 */ |
53 | paddr_t xengnt_revoke_transfer(grant_ref_t); |
54 | |
55 | /* |
56 | * Query grant status (i.e. if remote has a valid mapping to this grant). |
57 | * Returns GTF_reading | GTF_writing (0 if remote does not use it anymore). |
58 | */ |
59 | int xengnt_status(grant_ref_t); |
60 | |