1/******************************************************************************
2 * tpmif.h
3 *
4 * TPM I/O interface for Xen guest OSes.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Copyright (c) 2005, IBM Corporation
25 *
26 * Author: Stefan Berger, stefanb@us.ibm.com
27 * Grant table support: Mahadevan Gomathisankaran
28 *
29 * This code has been derived from tools/libxc/xen/io/netif.h
30 *
31 * Copyright (c) 2003-2004, Keir Fraser
32 */
33
34#ifndef __XEN_PUBLIC_IO_TPMIF_H__
35#define __XEN_PUBLIC_IO_TPMIF_H__
36
37#include "../grant_table.h"
38
39struct tpmif_tx_request {
40    unsigned long addr;   /* Machine address of packet.   */
41    grant_ref_t ref;      /* grant table access reference */
42    uint16_t unused;
43    uint16_t size;        /* Packet size in bytes.        */
44};
45typedef struct tpmif_tx_request tpmif_tx_request_t;
46
47/*
48 * The TPMIF_TX_RING_SIZE defines the number of pages the
49 * front-end and backend can exchange (= size of array).
50 */
51typedef uint32_t TPMIF_RING_IDX;
52
53#define TPMIF_TX_RING_SIZE 1
54
55/* This structure must fit in a memory page. */
56
57struct tpmif_ring {
58    struct tpmif_tx_request req;
59};
60typedef struct tpmif_ring tpmif_ring_t;
61
62struct tpmif_tx_interface {
63    struct tpmif_ring ring[TPMIF_TX_RING_SIZE];
64};
65typedef struct tpmif_tx_interface tpmif_tx_interface_t;
66
67#endif
68
69/*
70 * Local variables:
71 * mode: C
72 * c-set-style: "BSD"
73 * c-basic-offset: 4
74 * tab-width: 4
75 * indent-tabs-mode: nil
76 * End:
77 */
78