drivers/char/tpm/tpm_ibmvtpm.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2012 IBM Corporation
   4  *
   5  * Author: Ashley Lai <[email protected]>
   6  *
   7  * Maintained by: <[email protected]>
   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 };
  30
  31 struct ibmvtpm_dev {
  32         struct device *dev;
  33         struct vio_dev *vdev;
  34         struct ibmvtpm_crq_queue crq_queue;
  35         dma_addr_t crq_dma_handle;
  36         u32 rtce_size;
  37         void __iomem *rtce_buf;
  38         dma_addr_t rtce_dma_handle;
  39         spinlock_t rtce_lock;
  40         wait_queue_head_t wq;
  41         u16 res_len;
  42         u32 vtpm_version;
  43         bool tpm_processing_cmd;
  44 };
  45
  46 #define CRQ_RES_BUF_SIZE        PAGE_SIZE
  47
  48 /* Initialize CRQ */
  49 #define INIT_CRQ_CMD            0xC001000000000000LL /* Init cmd */
  50 #define INIT_CRQ_COMP_CMD       0xC002000000000000LL /* Init complete cmd */
  51 #define INIT_CRQ_RES            0x01    /* Init respond */
  52 #define INIT_CRQ_COMP_RES       0x02    /* Init complete respond */
  53 #define VALID_INIT_CRQ          0xC0    /* Valid command for init crq */
  54
  55 /* vTPM CRQ response is the message type | 0x80 */
  56 #define VTPM_MSG_RES            0x80
  57 #define IBMVTPM_VALID_CMD       0x80
  58
  59 /* vTPM CRQ message types */
  60 #define VTPM_GET_VERSION                        0x01
  61 #define VTPM_GET_VERSION_RES                    (0x01 | VTPM_MSG_RES)
  62
  63 #define VTPM_TPM_COMMAND                        0x02
  64 #define VTPM_TPM_COMMAND_RES                    (0x02 | VTPM_MSG_RES)
  65
  66 #define VTPM_GET_RTCE_BUFFER_SIZE               0x03
  67 #define VTPM_GET_RTCE_BUFFER_SIZE_RES           (0x03 | VTPM_MSG_RES)
  68
  69 #define VTPM_PREPARE_TO_SUSPEND                 0x04
  70 #define VTPM_PREPARE_TO_SUSPEND_RES             (0x04 | VTPM_MSG_RES)
  71
  72 #endif