1 /* $NetBSD: granttables.h,v 1.7 2009/10/19 18:41:10 bouyer 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/xen3-public/xen.h> 29 #include <xen/xen3-public/grant_table.h> 30 31 void xengnt_init(void); 32 33 /* 34 * grant access to a remote domain. Returns a handle on the allocated grant 35 * entry in table in grant_ref_t *. 36 */ 37 int xengnt_grant_access(domid_t, paddr_t, int, grant_ref_t *); 38 39 /* 40 * Revoke access. Caller is responsible to ensure that the grant entry is 41 * not referenced any more. 42 */ 43 void xengnt_revoke_access(grant_ref_t); 44 45 /* allow a page transfer from a remote domain */ 46 int xengnt_grant_transfer(domid_t, grant_ref_t *); 47 48 /* end transfer, return the new page address or 0 */ 49 paddr_t xengnt_revoke_transfer(grant_ref_t); 50 51 /* 52 * Query grant status (i.e. if remote has a valid mapping to this grant). 53 * Returns GTF_reading | GTF_writing (0 if remote does not use it anymore). 54 */ 55 int xengnt_status(grant_ref_t); 56