drivers/char/tpm/tpm_ibmvtpm.h

   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 */
  22 struct ibmvtpm_crq {
  23         u8 valid;
  24         u8 msg;
  25         __be16 len;
  26         __be32 data;
  27         __be64 reserved;
  28 } __attribute__((packed, aligned(8)));
  29
  30 struct ibmvtpm_crq_queue {
  31         struct ibmvtpm_crq *crq_addr;
  32         u32 index;
  33         u32 num_entry;
  34 };
  35
  36 struct 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