xref: /openbmc/linux/drivers/char/tpm/tpm_ibmvtpm.h (revision 047d4226)
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 */
17 struct ibmvtpm_crq {
18 	u8 valid;
19 	u8 msg;
20 	__be16 len;
21 	__be32 data;
22 	__be64 reserved;
23 } __attribute__((packed, aligned(8)));
24 
25 struct ibmvtpm_crq_queue {
26 	struct ibmvtpm_crq *crq_addr;
27 	u32 index;
28 	u32 num_entry;
29 	wait_queue_head_t wq;
30 };
31 
32 struct ibmvtpm_dev {
33 	struct device *dev;
34 	struct vio_dev *vdev;
35 	struct ibmvtpm_crq_queue crq_queue;
36 	dma_addr_t crq_dma_handle;
37 	u32 rtce_size;
38 	void __iomem *rtce_buf;
39 	dma_addr_t rtce_dma_handle;
40 	spinlock_t rtce_lock;
41 	wait_queue_head_t wq;
42 	u16 res_len;
43 	u32 vtpm_version;
44 	u8 tpm_processing_cmd;
45 };
46 
47 #define CRQ_RES_BUF_SIZE	PAGE_SIZE
48 
49 /* Initialize CRQ */
50 #define INIT_CRQ_CMD		0xC001000000000000LL /* Init cmd */
51 #define INIT_CRQ_COMP_CMD	0xC002000000000000LL /* Init complete cmd */
52 #define INIT_CRQ_RES		0x01	/* Init respond */
53 #define INIT_CRQ_COMP_RES	0x02	/* Init complete respond */
54 #define VALID_INIT_CRQ		0xC0	/* Valid command for init crq */
55 
56 /* vTPM CRQ response is the message type | 0x80 */
57 #define VTPM_MSG_RES		0x80
58 #define IBMVTPM_VALID_CMD	0x80
59 
60 /* vTPM CRQ message types */
61 #define VTPM_GET_VERSION			0x01
62 #define VTPM_GET_VERSION_RES			(0x01 | VTPM_MSG_RES)
63 
64 #define VTPM_TPM_COMMAND			0x02
65 #define VTPM_TPM_COMMAND_RES			(0x02 | VTPM_MSG_RES)
66 
67 #define VTPM_GET_RTCE_BUFFER_SIZE		0x03
68 #define VTPM_GET_RTCE_BUFFER_SIZE_RES		(0x03 | VTPM_MSG_RES)
69 
70 #define VTPM_PREPARE_TO_SUSPEND			0x04
71 #define VTPM_PREPARE_TO_SUSPEND_RES		(0x04 | VTPM_MSG_RES)
72 
73 #endif
74