| 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 | |