db34cf9122
The CCP cannot be hot-plugged so it will either be there or it won't. Do not allow the driver to stay loaded if the CCP does not successfully initialize. Provide stub routines in the ccp.h file that return -ENODEV if the CCP has not been configured in the build. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
538 lines
15 KiB
C
538 lines
15 KiB
C
/*
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* AMD Cryptographic Coprocessor (CCP) driver
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*
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* Copyright (C) 2013 Advanced Micro Devices, Inc.
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*
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* Author: Tom Lendacky <thomas.lendacky@amd.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __CPP_H__
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#define __CPP_H__
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#include <linux/scatterlist.h>
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#include <linux/workqueue.h>
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#include <linux/list.h>
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#include <crypto/aes.h>
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#include <crypto/sha.h>
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struct ccp_device;
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struct ccp_cmd;
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#if defined(CONFIG_CRYPTO_DEV_CCP_DD) || \
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defined(CONFIG_CRYPTO_DEV_CCP_DD_MODULE)
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/**
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* ccp_enqueue_cmd - queue an operation for processing by the CCP
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*
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* @cmd: ccp_cmd struct to be processed
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*
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* Refer to the ccp_cmd struct below for required fields.
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*
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* Queue a cmd to be processed by the CCP. If queueing the cmd
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* would exceed the defined length of the cmd queue the cmd will
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* only be queued if the CCP_CMD_MAY_BACKLOG flag is set and will
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* result in a return code of -EBUSY.
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*
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* The callback routine specified in the ccp_cmd struct will be
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* called to notify the caller of completion (if the cmd was not
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* backlogged) or advancement out of the backlog. If the cmd has
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* advanced out of the backlog the "err" value of the callback
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* will be -EINPROGRESS. Any other "err" value during callback is
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* the result of the operation.
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*
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* The cmd has been successfully queued if:
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* the return code is -EINPROGRESS or
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* the return code is -EBUSY and CCP_CMD_MAY_BACKLOG flag is set
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*/
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int ccp_enqueue_cmd(struct ccp_cmd *cmd);
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#else /* CONFIG_CRYPTO_DEV_CCP_DD is not enabled */
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static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd)
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{
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return -ENODEV;
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}
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#endif /* CONFIG_CRYPTO_DEV_CCP_DD */
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/***** AES engine *****/
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/**
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* ccp_aes_type - AES key size
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*
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* @CCP_AES_TYPE_128: 128-bit key
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* @CCP_AES_TYPE_192: 192-bit key
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* @CCP_AES_TYPE_256: 256-bit key
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*/
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enum ccp_aes_type {
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CCP_AES_TYPE_128 = 0,
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CCP_AES_TYPE_192,
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CCP_AES_TYPE_256,
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CCP_AES_TYPE__LAST,
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};
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/**
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* ccp_aes_mode - AES operation mode
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*
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* @CCP_AES_MODE_ECB: ECB mode
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* @CCP_AES_MODE_CBC: CBC mode
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* @CCP_AES_MODE_OFB: OFB mode
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* @CCP_AES_MODE_CFB: CFB mode
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* @CCP_AES_MODE_CTR: CTR mode
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* @CCP_AES_MODE_CMAC: CMAC mode
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*/
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enum ccp_aes_mode {
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CCP_AES_MODE_ECB = 0,
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CCP_AES_MODE_CBC,
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CCP_AES_MODE_OFB,
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CCP_AES_MODE_CFB,
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CCP_AES_MODE_CTR,
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CCP_AES_MODE_CMAC,
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CCP_AES_MODE__LAST,
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};
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/**
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* ccp_aes_mode - AES operation mode
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*
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* @CCP_AES_ACTION_DECRYPT: AES decrypt operation
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* @CCP_AES_ACTION_ENCRYPT: AES encrypt operation
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*/
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enum ccp_aes_action {
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CCP_AES_ACTION_DECRYPT = 0,
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CCP_AES_ACTION_ENCRYPT,
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CCP_AES_ACTION__LAST,
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};
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/**
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* struct ccp_aes_engine - CCP AES operation
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* @type: AES operation key size
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* @mode: AES operation mode
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* @action: AES operation (decrypt/encrypt)
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* @key: key to be used for this AES operation
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* @key_len: length in bytes of key
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* @iv: IV to be used for this AES operation
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* @iv_len: length in bytes of iv
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* @src: data to be used for this operation
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* @dst: data produced by this operation
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* @src_len: length in bytes of data used for this operation
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* @cmac_final: indicates final operation when running in CMAC mode
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* @cmac_key: K1/K2 key used in final CMAC operation
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* @cmac_key_len: length in bytes of cmac_key
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*
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* Variables required to be set when calling ccp_enqueue_cmd():
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* - type, mode, action, key, key_len, src, dst, src_len
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* - iv, iv_len for any mode other than ECB
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* - cmac_final for CMAC mode
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* - cmac_key, cmac_key_len for CMAC mode if cmac_final is non-zero
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*
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* The iv variable is used as both input and output. On completion of the
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* AES operation the new IV overwrites the old IV.
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*/
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struct ccp_aes_engine {
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enum ccp_aes_type type;
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enum ccp_aes_mode mode;
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enum ccp_aes_action action;
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struct scatterlist *key;
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u32 key_len; /* In bytes */
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struct scatterlist *iv;
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u32 iv_len; /* In bytes */
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struct scatterlist *src, *dst;
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u64 src_len; /* In bytes */
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u32 cmac_final; /* Indicates final cmac cmd */
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struct scatterlist *cmac_key; /* K1/K2 cmac key required for
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* final cmac cmd */
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u32 cmac_key_len; /* In bytes */
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};
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/***** XTS-AES engine *****/
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/**
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* ccp_xts_aes_unit_size - XTS unit size
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*
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* @CCP_XTS_AES_UNIT_SIZE_16: Unit size of 16 bytes
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* @CCP_XTS_AES_UNIT_SIZE_512: Unit size of 512 bytes
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* @CCP_XTS_AES_UNIT_SIZE_1024: Unit size of 1024 bytes
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* @CCP_XTS_AES_UNIT_SIZE_2048: Unit size of 2048 bytes
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* @CCP_XTS_AES_UNIT_SIZE_4096: Unit size of 4096 bytes
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*/
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enum ccp_xts_aes_unit_size {
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CCP_XTS_AES_UNIT_SIZE_16 = 0,
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CCP_XTS_AES_UNIT_SIZE_512,
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CCP_XTS_AES_UNIT_SIZE_1024,
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CCP_XTS_AES_UNIT_SIZE_2048,
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CCP_XTS_AES_UNIT_SIZE_4096,
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CCP_XTS_AES_UNIT_SIZE__LAST,
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};
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/**
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* struct ccp_xts_aes_engine - CCP XTS AES operation
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* @action: AES operation (decrypt/encrypt)
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* @unit_size: unit size of the XTS operation
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* @key: key to be used for this XTS AES operation
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* @key_len: length in bytes of key
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* @iv: IV to be used for this XTS AES operation
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* @iv_len: length in bytes of iv
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* @src: data to be used for this operation
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* @dst: data produced by this operation
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* @src_len: length in bytes of data used for this operation
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* @final: indicates final XTS operation
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*
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* Variables required to be set when calling ccp_enqueue_cmd():
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* - action, unit_size, key, key_len, iv, iv_len, src, dst, src_len, final
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*
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* The iv variable is used as both input and output. On completion of the
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* AES operation the new IV overwrites the old IV.
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*/
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struct ccp_xts_aes_engine {
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enum ccp_aes_action action;
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enum ccp_xts_aes_unit_size unit_size;
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struct scatterlist *key;
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u32 key_len; /* In bytes */
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struct scatterlist *iv;
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u32 iv_len; /* In bytes */
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struct scatterlist *src, *dst;
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u64 src_len; /* In bytes */
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u32 final;
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};
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/***** SHA engine *****/
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#define CCP_SHA_BLOCKSIZE SHA256_BLOCK_SIZE
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#define CCP_SHA_CTXSIZE SHA256_DIGEST_SIZE
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/**
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* ccp_sha_type - type of SHA operation
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*
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* @CCP_SHA_TYPE_1: SHA-1 operation
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* @CCP_SHA_TYPE_224: SHA-224 operation
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* @CCP_SHA_TYPE_256: SHA-256 operation
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*/
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enum ccp_sha_type {
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CCP_SHA_TYPE_1 = 1,
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CCP_SHA_TYPE_224,
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CCP_SHA_TYPE_256,
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CCP_SHA_TYPE__LAST,
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};
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/**
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* struct ccp_sha_engine - CCP SHA operation
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* @type: Type of SHA operation
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* @ctx: current hash value
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* @ctx_len: length in bytes of hash value
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* @src: data to be used for this operation
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* @src_len: length in bytes of data used for this operation
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* @final: indicates final SHA operation
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* @msg_bits: total length of the message in bits used in final SHA operation
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*
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* Variables required to be set when calling ccp_enqueue_cmd():
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* - type, ctx, ctx_len, src, src_len, final
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* - msg_bits if final is non-zero
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*
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* The ctx variable is used as both input and output. On completion of the
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* SHA operation the new hash value overwrites the old hash value.
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*/
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struct ccp_sha_engine {
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enum ccp_sha_type type;
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struct scatterlist *ctx;
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u32 ctx_len; /* In bytes */
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struct scatterlist *src;
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u64 src_len; /* In bytes */
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u32 final; /* Indicates final sha cmd */
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u64 msg_bits; /* Message length in bits required for
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* final sha cmd */
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};
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/***** RSA engine *****/
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/**
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* struct ccp_rsa_engine - CCP RSA operation
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* @key_size: length in bits of RSA key
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* @exp: RSA exponent
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* @exp_len: length in bytes of exponent
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* @mod: RSA modulus
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* @mod_len: length in bytes of modulus
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* @src: data to be used for this operation
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* @dst: data produced by this operation
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* @src_len: length in bytes of data used for this operation
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*
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* Variables required to be set when calling ccp_enqueue_cmd():
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* - key_size, exp, exp_len, mod, mod_len, src, dst, src_len
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*/
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struct ccp_rsa_engine {
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u32 key_size; /* In bits */
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struct scatterlist *exp;
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u32 exp_len; /* In bytes */
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struct scatterlist *mod;
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u32 mod_len; /* In bytes */
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struct scatterlist *src, *dst;
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u32 src_len; /* In bytes */
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};
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/***** Passthru engine *****/
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/**
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* ccp_passthru_bitwise - type of bitwise passthru operation
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*
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* @CCP_PASSTHRU_BITWISE_NOOP: no bitwise operation performed
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* @CCP_PASSTHRU_BITWISE_AND: perform bitwise AND of src with mask
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* @CCP_PASSTHRU_BITWISE_OR: perform bitwise OR of src with mask
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* @CCP_PASSTHRU_BITWISE_XOR: perform bitwise XOR of src with mask
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* @CCP_PASSTHRU_BITWISE_MASK: overwrite with mask
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*/
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enum ccp_passthru_bitwise {
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CCP_PASSTHRU_BITWISE_NOOP = 0,
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CCP_PASSTHRU_BITWISE_AND,
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CCP_PASSTHRU_BITWISE_OR,
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CCP_PASSTHRU_BITWISE_XOR,
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CCP_PASSTHRU_BITWISE_MASK,
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CCP_PASSTHRU_BITWISE__LAST,
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};
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/**
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* ccp_passthru_byteswap - type of byteswap passthru operation
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*
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* @CCP_PASSTHRU_BYTESWAP_NOOP: no byte swapping performed
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* @CCP_PASSTHRU_BYTESWAP_32BIT: swap bytes within 32-bit words
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* @CCP_PASSTHRU_BYTESWAP_256BIT: swap bytes within 256-bit words
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*/
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enum ccp_passthru_byteswap {
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CCP_PASSTHRU_BYTESWAP_NOOP = 0,
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CCP_PASSTHRU_BYTESWAP_32BIT,
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CCP_PASSTHRU_BYTESWAP_256BIT,
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CCP_PASSTHRU_BYTESWAP__LAST,
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};
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/**
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* struct ccp_passthru_engine - CCP pass-through operation
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* @bit_mod: bitwise operation to perform
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* @byte_swap: byteswap operation to perform
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* @mask: mask to be applied to data
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* @mask_len: length in bytes of mask
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* @src: data to be used for this operation
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* @dst: data produced by this operation
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* @src_len: length in bytes of data used for this operation
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* @final: indicate final pass-through operation
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*
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* Variables required to be set when calling ccp_enqueue_cmd():
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* - bit_mod, byte_swap, src, dst, src_len
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* - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP
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*/
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struct ccp_passthru_engine {
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enum ccp_passthru_bitwise bit_mod;
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enum ccp_passthru_byteswap byte_swap;
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struct scatterlist *mask;
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u32 mask_len; /* In bytes */
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struct scatterlist *src, *dst;
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u64 src_len; /* In bytes */
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u32 final;
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};
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/***** ECC engine *****/
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#define CCP_ECC_MODULUS_BYTES 48 /* 384-bits */
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#define CCP_ECC_MAX_OPERANDS 6
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#define CCP_ECC_MAX_OUTPUTS 3
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/**
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* ccp_ecc_function - type of ECC function
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*
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* @CCP_ECC_FUNCTION_MMUL_384BIT: 384-bit modular multiplication
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* @CCP_ECC_FUNCTION_MADD_384BIT: 384-bit modular addition
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* @CCP_ECC_FUNCTION_MINV_384BIT: 384-bit multiplicative inverse
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* @CCP_ECC_FUNCTION_PADD_384BIT: 384-bit point addition
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* @CCP_ECC_FUNCTION_PMUL_384BIT: 384-bit point multiplication
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* @CCP_ECC_FUNCTION_PDBL_384BIT: 384-bit point doubling
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*/
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enum ccp_ecc_function {
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CCP_ECC_FUNCTION_MMUL_384BIT = 0,
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CCP_ECC_FUNCTION_MADD_384BIT,
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CCP_ECC_FUNCTION_MINV_384BIT,
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CCP_ECC_FUNCTION_PADD_384BIT,
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CCP_ECC_FUNCTION_PMUL_384BIT,
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CCP_ECC_FUNCTION_PDBL_384BIT,
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};
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/**
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* struct ccp_ecc_modular_math - CCP ECC modular math parameters
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* @operand_1: first operand for the modular math operation
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* @operand_1_len: length of the first operand
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* @operand_2: second operand for the modular math operation
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* (not used for CCP_ECC_FUNCTION_MINV_384BIT)
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* @operand_2_len: length of the second operand
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* (not used for CCP_ECC_FUNCTION_MINV_384BIT)
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* @result: result of the modular math operation
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* @result_len: length of the supplied result buffer
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*/
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struct ccp_ecc_modular_math {
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struct scatterlist *operand_1;
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unsigned int operand_1_len; /* In bytes */
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struct scatterlist *operand_2;
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unsigned int operand_2_len; /* In bytes */
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struct scatterlist *result;
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unsigned int result_len; /* In bytes */
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};
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/**
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* struct ccp_ecc_point - CCP ECC point definition
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* @x: the x coordinate of the ECC point
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* @x_len: the length of the x coordinate
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* @y: the y coordinate of the ECC point
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* @y_len: the length of the y coordinate
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*/
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struct ccp_ecc_point {
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struct scatterlist *x;
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unsigned int x_len; /* In bytes */
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struct scatterlist *y;
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unsigned int y_len; /* In bytes */
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};
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/**
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* struct ccp_ecc_point_math - CCP ECC point math parameters
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* @point_1: the first point of the ECC point math operation
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* @point_2: the second point of the ECC point math operation
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* (only used for CCP_ECC_FUNCTION_PADD_384BIT)
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* @domain_a: the a parameter of the ECC curve
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* @domain_a_len: the length of the a parameter
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* @scalar: the scalar parameter for the point match operation
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* (only used for CCP_ECC_FUNCTION_PMUL_384BIT)
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* @scalar_len: the length of the scalar parameter
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* (only used for CCP_ECC_FUNCTION_PMUL_384BIT)
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* @result: the point resulting from the point math operation
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*/
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struct ccp_ecc_point_math {
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struct ccp_ecc_point point_1;
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struct ccp_ecc_point point_2;
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struct scatterlist *domain_a;
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unsigned int domain_a_len; /* In bytes */
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struct scatterlist *scalar;
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unsigned int scalar_len; /* In bytes */
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struct ccp_ecc_point result;
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};
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/**
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* struct ccp_ecc_engine - CCP ECC operation
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* @function: ECC function to perform
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* @mod: ECC modulus
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* @mod_len: length in bytes of modulus
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* @mm: module math parameters
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* @pm: point math parameters
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* @ecc_result: result of the ECC operation
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*
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* Variables required to be set when calling ccp_enqueue_cmd():
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* - function, mod, mod_len
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* - operand, operand_len, operand_count, output, output_len, output_count
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* - ecc_result
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*/
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struct ccp_ecc_engine {
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enum ccp_ecc_function function;
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struct scatterlist *mod;
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u32 mod_len; /* In bytes */
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union {
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struct ccp_ecc_modular_math mm;
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struct ccp_ecc_point_math pm;
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} u;
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u16 ecc_result;
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};
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/**
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* ccp_engine - CCP operation identifiers
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*
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* @CCP_ENGINE_AES: AES operation
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* @CCP_ENGINE_XTS_AES: 128-bit XTS AES operation
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* @CCP_ENGINE_RSVD1: unused
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* @CCP_ENGINE_SHA: SHA operation
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* @CCP_ENGINE_RSA: RSA operation
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* @CCP_ENGINE_PASSTHRU: pass-through operation
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* @CCP_ENGINE_ZLIB_DECOMPRESS: unused
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* @CCP_ENGINE_ECC: ECC operation
|
|
*/
|
|
enum ccp_engine {
|
|
CCP_ENGINE_AES = 0,
|
|
CCP_ENGINE_XTS_AES_128,
|
|
CCP_ENGINE_RSVD1,
|
|
CCP_ENGINE_SHA,
|
|
CCP_ENGINE_RSA,
|
|
CCP_ENGINE_PASSTHRU,
|
|
CCP_ENGINE_ZLIB_DECOMPRESS,
|
|
CCP_ENGINE_ECC,
|
|
CCP_ENGINE__LAST,
|
|
};
|
|
|
|
/* Flag values for flags member of ccp_cmd */
|
|
#define CCP_CMD_MAY_BACKLOG 0x00000001
|
|
|
|
/**
|
|
* struct ccp_cmd - CPP operation request
|
|
* @entry: list element (ccp driver use only)
|
|
* @work: work element used for callbacks (ccp driver use only)
|
|
* @ccp: CCP device to be run on (ccp driver use only)
|
|
* @ret: operation return code (ccp driver use only)
|
|
* @flags: cmd processing flags
|
|
* @engine: CCP operation to perform
|
|
* @engine_error: CCP engine return code
|
|
* @u: engine specific structures, refer to specific engine struct below
|
|
* @callback: operation completion callback function
|
|
* @data: parameter value to be supplied to the callback function
|
|
*
|
|
* Variables required to be set when calling ccp_enqueue_cmd():
|
|
* - engine, callback
|
|
* - See the operation structures below for what is required for each
|
|
* operation.
|
|
*/
|
|
struct ccp_cmd {
|
|
/* The list_head, work_struct, ccp and ret variables are for use
|
|
* by the CCP driver only.
|
|
*/
|
|
struct list_head entry;
|
|
struct work_struct work;
|
|
struct ccp_device *ccp;
|
|
int ret;
|
|
|
|
u32 flags;
|
|
|
|
enum ccp_engine engine;
|
|
u32 engine_error;
|
|
|
|
union {
|
|
struct ccp_aes_engine aes;
|
|
struct ccp_xts_aes_engine xts;
|
|
struct ccp_sha_engine sha;
|
|
struct ccp_rsa_engine rsa;
|
|
struct ccp_passthru_engine passthru;
|
|
struct ccp_ecc_engine ecc;
|
|
} u;
|
|
|
|
/* Completion callback support */
|
|
void (*callback)(void *data, int err);
|
|
void *data;
|
|
};
|
|
|
|
#endif
|