acrn-hypervisor/devicemodel/include/rpmb.h

196 lines
6.1 KiB
C

/*
* Copyright (C) 2018 Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Contact Information: weideng <wei.a.deng@intel.com>
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifndef __RPMB_H__
#define __RPMB_H__
#include <linux/types.h>
#define RPMB_PHY_MODE 0
#define RPMB_SIM_MODE 1
#define RPMB_BLOCK_SIZE 256
#define RPMB_FRAME_SIZE 512
#define RPMB_PHY_PATH_NAME "/dev/rpmbmux"
#define RPMB_SIM_PATH_NAME "/data/rpmbfile"
#define SEQ_CMD_MAX 3 /*support up to 3 cmds*/
#define RPMB_F_WRITE (1UL << 0)
#define RPMB_F_REL_WRITE (1UL << 1)
enum rpmb_request {
RPMB_REQ_PROGRAM_KEY = 0x0001,
RPMB_REQ_GET_COUNTER = 0x0002,
RPMB_REQ_DATA_WRITE = 0x0003,
RPMB_REQ_DATA_READ = 0x0004,
RPMB_REQ_RESULT_READ = 0x0005,
};
enum rpmb_response {
RPMB_RESP_PROGRAM_KEY = 0x0100,
RPMB_RESP_GET_COUNTER = 0x0200,
RPMB_RESP_DATA_WRITE = 0x0300,
RPMB_RESP_DATA_READ = 0x0400,
};
enum rpmb_result {
RPMB_RES_OK = 0x0000,
RPMB_RES_GENERAL_FAILURE = 0x0001,
RPMB_RES_AUTH_FAILURE = 0x0002,
RPMB_RES_COUNT_FAILURE = 0x0003,
RPMB_RES_ADDR_FAILURE = 0x0004,
RPMB_RES_WRITE_FAILURE = 0x0005,
RPMB_RES_READ_FAILURE = 0x0006,
RPMB_RES_NO_AUTH_KEY = 0x0007,
RPMB_RES_WRITE_COUNTER_EXPIRED = 0x0080,
};
/**
* struct rpmb_cmd: rpmb access command
*
* @flags: command flags
* 0 - read command
* 1 - write command RPMB_F_WRITE
* 2 - reliable write RPMB_F_REL_WRITE
* @nframes: number of rpmb frames in the command
* @frames: list of rpmb frames
*/
struct rpmb_cmd {
__u32 flags;
__u32 nframes;
struct rpmb_frame *frames;
};
/**
* struct rpmb_data - rpmb data be transmitted in RPMB request
*
* @req_type: request type (program key, read, write, write counter)
* @icmd: list of input frames
* @ocmd: list of result frames
*/
struct rpmb_data {
__u16 req_type;
struct rpmb_cmd icmd;
struct rpmb_cmd ocmd;
};
/**
* struct rpmb_frame - rpmb frame as defined by specs
*
* @stuff : stuff bytes
* @key_mac : The authentication key or the message authentication
* code (MAC) depending on the request/response type.
* The MAC will be delivered in the last (or the only)
* block of data.
* @data : Data to be written or read by signed access.
* @nonce : Random number generated by the host for the requests
* and copied to the response by the RPMB engine.
* @write_counter: Counter value for the total amount of the successful
* authenticated data write requests made by the host.
* @addr : Address of the data to be programmed to or read
* from the RPMB. Address is the serial number of
* the accessed block (half sector 256B).
* @block_count : Number of blocks (half sectors, 256B) requested to be
* read/programmed.
* @result : Includes information about the status of the write counter
* (valid, expired) and result of the access made to the RPMB.
* @req_resp : Defines the type of request and response to/from the memory.
*/
struct rpmb_frame {
__u8 stuff[196];
__u8 key_mac[32];
__u8 data[256];
__u8 nonce[16];
__be32 write_counter;
__be16 addr;
__be16 block_count;
__be16 result;
__be16 req_resp;
} __attribute__((packed));
/**
* struct rpmb_cmd - rpmb access command
*
* @flags: command flags
* 0 - read command
* 1 - write commnad RPMB_F_WRITE
* 2 - reliable write RPMB_F_REL_WRITE
* @nframes: number of rpmb frames in the command
* @frames_ptr: a pointer to the list of rpmb frames
*/
struct rpmb_ioc_cmd {
__u32 flags;
__u32 nframes;
__aligned_u64 frames_ptr;
};
/**
* struct rpmb_ioc_req_cmd - rpmb operation request command
*
* @req_type: request type: must match the in frame req_resp
* program key
* get write counter
* write data
* read data
* @icmd: input command
* @ocmd: output/result command
*/
struct rpmb_ioc_req_cmd {
__u64 req_type;
struct rpmb_ioc_cmd icmd;
struct rpmb_ioc_cmd ocmd;
};
/**
* struct rpmb_ioc_seq_cmd - rpmb command sequence
*
* @num_of_cmds: number of commands
* @cmds: list of rpmb commands
*/
struct rpmb_ioc_seq_cmd {
__u64 num_of_cmds;
struct rpmb_ioc_cmd cmds[0];
};
struct rpmb_ioc_seq_data {
struct rpmb_ioc_seq_cmd h;
struct rpmb_ioc_cmd cmd[SEQ_CMD_MAX + 1];
};
int
rpmb_get_counter(__u8 mode, __u8 *key, __u32 *counter, __u16 *result);
#define RPMB_IOC_REQ_CMD _IOWR(0xB5, 80, struct rpmb_ioc_req_cmd)
#define RPMB_IOC_SEQ_CMD _IOWR(0xB5, 82, struct rpmb_ioc_seq_cmd)
__u16 rpmb_get_blocks(void);
#endif /* __RPMB_H__ */