tpm_ibmvtpm.h

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/*
 * Copyright (C) 2012 IBM Corporation
 *
 * Author: Ashley Lai <[email protected]>
 *
 * Maintained by: <[email protected]>
 *
 * Device driver for TCG/TCPA TPM (trusted platform module).
 * Specifications at www.trustedcomputinggroup.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, version 2 of the
 * License.
 *
 */

#ifndef __TPM_IBMVTPM_H__
#define __TPM_IBMVTPM_H__

/* vTPM Message Format 1 */
struct ibmvtpm_crq {
    u8 valid;
    u8 msg;
    u16 len;
    u32 data;
    u64 reserved;
} __attribute__((packed, aligned(8)));

struct ibmvtpm_crq_queue {
    struct ibmvtpm_crq *crq_addr;
    u32 index;
    u32 num_entry;
};

struct ibmvtpm_dev {
    struct device *dev;
    struct vio_dev *vdev;
    struct ibmvtpm_crq_queue crq_queue;
    dma_addr_t crq_dma_handle;
    spinlock_t lock;
    struct tasklet_struct tasklet;
    u32 rtce_size;
    void __iomem *rtce_buf;
    dma_addr_t rtce_dma_handle;
    spinlock_t rtce_lock;
    struct ibmvtpm_crq crq_res;
    u32 vtpm_version;
};

#define CRQ_RES_BUF_SIZE    PAGE_SIZE

/* Initialize CRQ */
#define INIT_CRQ_CMD        0xC001000000000000LL /* Init cmd */
#define INIT_CRQ_COMP_CMD   0xC002000000000000LL /* Init complete cmd */
#define INIT_CRQ_RES        0x01    /* Init respond */
#define INIT_CRQ_COMP_RES   0x02    /* Init complete respond */
#define VALID_INIT_CRQ      0xC0    /* Valid command for init crq */

/* vTPM CRQ response is the message type | 0x80 */
#define VTPM_MSG_RES        0x80
#define IBMVTPM_VALID_CMD   0x80

/* vTPM CRQ message types */
#define VTPM_GET_VERSION            0x01
#define VTPM_GET_VERSION_RES            (0x01 | VTPM_MSG_RES)

#define VTPM_TPM_COMMAND            0x02
#define VTPM_TPM_COMMAND_RES            (0x02 | VTPM_MSG_RES)

#define VTPM_GET_RTCE_BUFFER_SIZE       0x03
#define VTPM_GET_RTCE_BUFFER_SIZE_RES       (0x03 | VTPM_MSG_RES)

#define VTPM_PREPARE_TO_SUSPEND         0x04
#define VTPM_PREPARE_TO_SUSPEND_RES     (0x04 | VTPM_MSG_RES)

#endif