1 /** @file 2 Grant Table function declaration. 3 4 Grant Table are used to grant access to certain page of the current 5 VM to an other VM. 6 7 Copyright (C) 2014, Citrix Ltd. 8 9 This program and the accompanying materials 10 are licensed and made available under the terms and conditions of the BSD License 11 which accompanies this distribution. The full text of the license may be found at 12 http://opensource.org/licenses/bsd-license.php 13 14 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 15 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 16 17 **/ 18 #ifndef __GNTTAB_H__ 19 #define __GNTTAB_H__ 20 21 #include <IndustryStandard/Xen/grant_table.h> 22 23 /** 24 Initialize the Grant Table at the address MmioAddr. 25 26 @param Dev A pointer to XENBUS_DEVICE. 27 @param MmioAddr An address where the grant table can be mapped into 28 the guest. 29 **/ 30 VOID 31 XenGrantTableInit ( 32 IN XENBUS_DEVICE *Dev 33 ); 34 35 /** 36 Desinitilize the Grant Table. 37 **/ 38 VOID 39 XenGrantTableDeinit ( 40 IN XENBUS_DEVICE *Dev 41 ); 42 43 /** 44 Grant access to the page Frame to the domain DomainId. 45 46 @param This A pointer to XENBUS_PROTOCOL instance. 47 @param DomainId ID of the domain to grant acces to. 48 @param Frame Frame Number of the page to grant access to. 49 @param ReadOnly Provide read-only or read-write access. 50 @param RefPtr Reference number of the grant will be written to this pointer. 51 **/ 52 EFI_STATUS 53 EFIAPI 54 XenBusGrantAccess ( 55 IN XENBUS_PROTOCOL *This, 56 IN domid_t DomainId, 57 IN UINTN Frame, // MFN 58 IN BOOLEAN ReadOnly, 59 OUT grant_ref_t *RefPtr 60 ); 61 62 /** 63 End access to grant Ref, previously return by XenBusGrantAccess. 64 65 @param This A pointer to XENBUS_PROTOCOL instance. 66 @param Ref Reference numeber of a grant previously returned by 67 XenBusGrantAccess. 68 **/ 69 EFI_STATUS 70 EFIAPI 71 XenBusGrantEndAccess ( 72 IN XENBUS_PROTOCOL *This, 73 IN grant_ref_t Ref 74 ); 75 76 #endif /* !__GNTTAB_H__ */ 77