tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2012 IBM Corporation
4 *
5 * Author: Ashley Lai <ashleydlai@gmail.com>
6 *
7 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
8 *
9 * Device driver for TCG/TCPA TPM (trusted platform module).
10 * Specifications at www.trustedcomputinggroup.org
11 */
12
13#ifndef __TPM_IBMVTPM_H__
14#define __TPM_IBMVTPM_H__
15
16/* vTPM Message Format 1 */
17struct ibmvtpm_crq {
18 u8 valid;
19 u8 msg;
20 __be16 len;
21 __be32 data;
22 __be64 reserved;
23} __attribute__((packed, aligned(8)));
24
25struct ibmvtpm_crq_queue {
26 struct ibmvtpm_crq *crq_addr;
27 u32 index;
28 u32 num_entry;
29};
30
31struct ibmvtpm_dev {
32 struct device *dev;
33 struct vio_dev *vdev;
34 struct ibmvtpm_crq_queue crq_queue;
35 dma_addr_t crq_dma_handle;
36 u32 rtce_size;
37 void __iomem *rtce_buf;
38 dma_addr_t rtce_dma_handle;
39 spinlock_t rtce_lock;
40 wait_queue_head_t wq;
41 u16 res_len;
42 u32 vtpm_version;
43 bool tpm_processing_cmd;
44};
45
46#define CRQ_RES_BUF_SIZE PAGE_SIZE
47
48/* Initialize CRQ */
49#define INIT_CRQ_CMD 0xC001000000000000LL /* Init cmd */
50#define INIT_CRQ_COMP_CMD 0xC002000000000000LL /* Init complete cmd */
51#define INIT_CRQ_RES 0x01 /* Init respond */
52#define INIT_CRQ_COMP_RES 0x02 /* Init complete respond */
53#define VALID_INIT_CRQ 0xC0 /* Valid command for init crq */
54
55/* vTPM CRQ response is the message type | 0x80 */
56#define VTPM_MSG_RES 0x80
57#define IBMVTPM_VALID_CMD 0x80
58
59/* vTPM CRQ message types */
60#define VTPM_GET_VERSION 0x01
61#define VTPM_GET_VERSION_RES (0x01 | VTPM_MSG_RES)
62
63#define VTPM_TPM_COMMAND 0x02
64#define VTPM_TPM_COMMAND_RES (0x02 | VTPM_MSG_RES)
65
66#define VTPM_GET_RTCE_BUFFER_SIZE 0x03
67#define VTPM_GET_RTCE_BUFFER_SIZE_RES (0x03 | VTPM_MSG_RES)
68
69#define VTPM_PREPARE_TO_SUSPEND 0x04
70#define VTPM_PREPARE_TO_SUSPEND_RES (0x04 | VTPM_MSG_RES)
71
72#endif