LXR linux/drivers/char/tpm/tpm

   1/*
   2 * Copyright (C) 2012 IBM Corporation
   3 *
   4 * Author: Ashley Lai <ashleydlai@gmail.com>
   5 *
   6 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
   7 *
   8 * Device driver for TCG/TCPA TPM (trusted platform module).
   9 * Specifications at www.trustedcomputinggroup.org
  10 *
  11 * This program is free software; you can redistribute it and/or
  12 * modify it under the terms of the GNU General Public License as
  13 * published by the Free Software Foundation, version 2 of the
  14 * License.
  15 *
  16 */
  17
  18#ifndef __TPM_IBMVTPM_H__
  19#define __TPM_IBMVTPM_H__
  20
  21/* vTPM Message Format 1 */
  22struct ibmvtpm_crq {
  23        u8 valid;
  24        u8 msg;
  25        __be16 len;
  26        __be32 data;
  27        __be64 reserved;
  28} __attribute__((packed, aligned(8)));
  29
  30struct ibmvtpm_crq_queue {
  31        struct ibmvtpm_crq *crq_addr;
  32        u32 index;
  33        u32 num_entry;
  34};
  35
  36struct ibmvtpm_dev {
  37        struct device *dev;
  38        struct vio_dev *vdev;
  39        struct ibmvtpm_crq_queue crq_queue;
  40        dma_addr_t crq_dma_handle;
  41        u32 rtce_size;
  42        void __iomem *rtce_buf;
  43        dma_addr_t rtce_dma_handle;
  44        spinlock_t rtce_lock;
  45        wait_queue_head_t wq;
  46        u16 res_len;
  47        u32 vtpm_version;
  48        bool tpm_processing_cmd;
  49};
  50
  51#define CRQ_RES_BUF_SIZE        PAGE_SIZE
  52
  53/* Initialize CRQ */
  54#define INIT_CRQ_CMD            0xC001000000000000LL /* Init cmd */
  55#define INIT_CRQ_COMP_CMD       0xC002000000000000LL /* Init complete cmd */
  56#define INIT_CRQ_RES            0x01    /* Init respond */
  57#define INIT_CRQ_COMP_RES       0x02    /* Init complete respond */
  58#define VALID_INIT_CRQ          0xC0    /* Valid command for init crq */
  59
  60/* vTPM CRQ response is the message type | 0x80 */
  61#define VTPM_MSG_RES            0x80
  62#define IBMVTPM_VALID_CMD       0x80
  63
  64/* vTPM CRQ message types */
  65#define VTPM_GET_VERSION                        0x01
  66#define VTPM_GET_VERSION_RES                    (0x01 | VTPM_MSG_RES)
  67
  68#define VTPM_TPM_COMMAND                        0x02
  69#define VTPM_TPM_COMMAND_RES                    (0x02 | VTPM_MSG_RES)
  70
  71#define VTPM_GET_RTCE_BUFFER_SIZE               0x03
  72#define VTPM_GET_RTCE_BUFFER_SIZE_RES           (0x03 | VTPM_MSG_RES)
  73
  74#define VTPM_PREPARE_TO_SUSPEND                 0x04
  75#define VTPM_PREPARE_TO_SUSPEND_RES             (0x04 | VTPM_MSG_RES)
  76
  77#endif
  78