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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/drivers/char/tpm/tpm_ibmvtpm.h
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/* SPDX-License-Identifier: GPL-2.0-only */

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/*

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 * Copyright (C) 2012 IBM Corporation

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 *

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 * Author: Ashley Lai <[email protected]>

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 *

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 * Maintained by: <[email protected]>

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 *

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 * Device driver for TCG/TCPA TPM (trusted platform module).

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 * Specifications at www.trustedcomputinggroup.org

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 */

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#ifndef __TPM_IBMVTPM_H__

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#define __TPM_IBMVTPM_H__

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/* vTPM Message Format 1 */

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struct ibmvtpm_crq {

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	u8 valid;

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	u8 msg;

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	__be16 len;

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	__be32 data;

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	__be64 reserved;

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} __attribute__((packed, aligned(8)));

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struct ibmvtpm_crq_queue {

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	struct ibmvtpm_crq *crq_addr;

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	u32 index;

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	u32 num_entry;

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	wait_queue_head_t wq;

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};

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struct ibmvtpm_dev {

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	struct device *dev;

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	struct vio_dev *vdev;

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	struct ibmvtpm_crq_queue crq_queue;

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	dma_addr_t crq_dma_handle;

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	u32 rtce_size;

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	void __iomem *rtce_buf;

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	dma_addr_t rtce_dma_handle;

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	spinlock_t rtce_lock;

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	wait_queue_head_t wq;

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	u16 res_len;

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	u32 vtpm_version;

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	u8 tpm_processing_cmd;

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};

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#define CRQ_RES_BUF_SIZE	PAGE_SIZE

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/* Initialize CRQ */

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#define INIT_CRQ_CMD		0xC001000000000000LL /* Init cmd */

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#define INIT_CRQ_COMP_CMD	0xC002000000000000LL /* Init complete cmd */

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#define INIT_CRQ_RES		0x01	/* Init respond */

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#define INIT_CRQ_COMP_RES	0x02	/* Init complete respond */

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#define VALID_INIT_CRQ		0xC0	/* Valid command for init crq */

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/* vTPM CRQ response is the message type | 0x80 */

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#define VTPM_MSG_RES		0x80

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#define IBMVTPM_VALID_CMD	0x80

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/* vTPM CRQ message types */

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#define VTPM_GET_VERSION			0x01

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#define VTPM_GET_VERSION_RES			(0x01 | VTPM_MSG_RES)

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#define VTPM_TPM_COMMAND			0x02

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#define VTPM_TPM_COMMAND_RES			(0x02 | VTPM_MSG_RES)

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#define VTPM_GET_RTCE_BUFFER_SIZE		0x03

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#define VTPM_GET_RTCE_BUFFER_SIZE_RES		(0x03 | VTPM_MSG_RES)

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#define VTPM_PREPARE_TO_SUSPEND			0x04

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#define VTPM_PREPARE_TO_SUSPEND_RES		(0x04 | VTPM_MSG_RES)

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#endif

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