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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 IBM Corporation
*
* Author: Ashley Lai <ashleydlai@gmail.com>
*
* Maintained by: <tpmdd-devel@lists.sourceforge.net>
*
* Device driver for TCG/TCPA TPM (trusted platform module).
* Specifications at www.trustedcomputinggroup.org
*/
#ifndef __TPM_IBMVTPM_H__
#define __TPM_IBMVTPM_H__
/* vTPM Message Format 1 */
struct ibmvtpm_crq {
u8 valid;
u8 msg;
__be16 len;
__be32 data;
__be64 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;
u32 rtce_size;
void __iomem *rtce_buf;
dma_addr_t rtce_dma_handle;
spinlock_t rtce_lock;
wait_queue_head_t wq;
u16 res_len;
u32 vtpm_version;
bool tpm_processing_cmd;
};
#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
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