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 <ashleydlai@gmail.com>
   6  *
   7  * Maintained by: <tpmdd-devel@lists.sourceforge.net>
   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         wait_queue_head_t wq;
  30 };
  31
  32 struct ibmvtpm_dev {
  33         struct device *dev;
  34         struct vio_dev *vdev;
  35         struct ibmvtpm_crq_queue crq_queue;
  36         dma_addr_t crq_dma_handle;
  37         u32 rtce_size;
  38         void __iomem *rtce_buf;
  39         dma_addr_t rtce_dma_handle;
  40         spinlock_t rtce_lock;
  41         wait_queue_head_t wq;
  42         u16 res_len;
  43         u32 vtpm_version;
  44         bool tpm_processing_cmd;
  45 };
  46
  47 #define CRQ_RES_BUF_SIZE        PAGE_SIZE
  48
  49 /* Initialize CRQ */
  50 #define INIT_CRQ_CMD            0xC001000000000000LL /* Init cmd */
  51 #define INIT_CRQ_COMP_CMD       0xC002000000000000LL /* Init complete cmd */
  52 #define INIT_CRQ_RES            0x01    /* Init respond */
  53 #define INIT_CRQ_COMP_RES       0x02    /* Init complete respond */
  54 #define VALID_INIT_CRQ          0xC0    /* Valid command for init crq */
  55
  56 /* vTPM CRQ response is the message type | 0x80 */
  57 #define VTPM_MSG_RES            0x80
  58 #define IBMVTPM_VALID_CMD       0x80
  59
  60 /* vTPM CRQ message types */
  61 #define VTPM_GET_VERSION                        0x01
  62 #define VTPM_GET_VERSION_RES                    (0x01 | VTPM_MSG_RES)
  63
  64 #define VTPM_TPM_COMMAND                        0x02
  65 #define VTPM_TPM_COMMAND_RES                    (0x02 | VTPM_MSG_RES)
  66
  67 #define VTPM_GET_RTCE_BUFFER_SIZE               0x03
  68 #define VTPM_GET_RTCE_BUFFER_SIZE_RES           (0x03 | VTPM_MSG_RES)
  69
  70 #define VTPM_PREPARE_TO_SUSPEND                 0x04
  71 #define VTPM_PREPARE_TO_SUSPEND_RES             (0x04 | VTPM_MSG_RES)
  72
  73 #endif