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/* Qualcomm Crypto Engine driver API
*
* Copyright (c) 2010-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __CRYPTO_MSM_QCE_H
#define __CRYPTO_MSM_QCE_H
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/crypto.h>
#include <crypto/algapi.h>
#include <crypto/aes.h>
#include <crypto/des.h>
#include <crypto/sha.h>
#include <crypto/aead.h>
#include <crypto/authenc.h>
#include <crypto/scatterwalk.h>
/* SHA digest size in bytes */
#define SHA256_DIGESTSIZE 32
#define SHA1_DIGESTSIZE 20
#define AES_CE_BLOCK_SIZE 16
/* key size in bytes */
#define HMAC_KEY_SIZE (SHA1_DIGESTSIZE) /* hmac-sha1 */
#define SHA_HMAC_KEY_SIZE 64
#define DES_KEY_SIZE 8
#define TRIPLE_DES_KEY_SIZE 24
#define AES128_KEY_SIZE 16
#define AES192_KEY_SIZE 24
#define AES256_KEY_SIZE 32
#define MAX_CIPHER_KEY_SIZE AES256_KEY_SIZE
/* iv length in bytes */
#define AES_IV_LENGTH 16
#define DES_IV_LENGTH 8
#define MAX_IV_LENGTH AES_IV_LENGTH
/* Maximum number of bytes per transfer */
#define QCE_MAX_OPER_DATA 0xFF00
/* Maximum Nonce bytes */
#define MAX_NONCE 16
typedef void (*qce_comp_func_ptr_t)(void *areq,
unsigned char *icv, unsigned char *iv, int ret);
/* Cipher algorithms supported */
enum qce_cipher_alg_enum {
CIPHER_ALG_DES = 0,
CIPHER_ALG_3DES = 1,
CIPHER_ALG_AES = 2,
CIPHER_ALG_LAST
};
/* Hash and hmac algorithms supported */
enum qce_hash_alg_enum {
QCE_HASH_SHA1 = 0,
QCE_HASH_SHA256 = 1,
QCE_HASH_SHA1_HMAC = 2,
QCE_HASH_SHA256_HMAC = 3,
QCE_HASH_AES_CMAC = 4,
QCE_HASH_LAST
};
/* Cipher encryption/decryption operations */
enum qce_cipher_dir_enum {
QCE_ENCRYPT = 0,
QCE_DECRYPT = 1,
QCE_CIPHER_DIR_LAST
};
/* Cipher algorithms modes */
enum qce_cipher_mode_enum {
QCE_MODE_CBC = 0,
QCE_MODE_ECB = 1,
QCE_MODE_CTR = 2,
QCE_MODE_XTS = 3,
QCE_MODE_CCM = 4,
QCE_CIPHER_MODE_LAST
};
/* Cipher operation type */
enum qce_req_op_enum {
QCE_REQ_ABLK_CIPHER = 0,
QCE_REQ_ABLK_CIPHER_NO_KEY = 1,
QCE_REQ_AEAD = 2,
QCE_REQ_LAST
};
/* Algorithms/features supported in CE HW engine */
struct ce_hw_support {
bool sha1_hmac_20; /* Supports 20 bytes of HMAC key*/
bool sha1_hmac; /* supports max HMAC key of 64 bytes*/
bool sha256_hmac; /* supports max HMAC key of 64 bytes*/
bool sha_hmac; /* supports SHA1 and SHA256 MAX HMAC key of 64 bytes*/
bool cmac;
bool aes_key_192;
bool aes_xts;
bool aes_ccm;
bool ota;
bool aligned_only;
bool bam;
bool is_shared;
bool hw_key;
bool use_sw_aes_cbc_ecb_ctr_algo;
bool use_sw_aead_algo;
bool use_sw_aes_xts_algo;
bool use_sw_ahash_algo;
bool use_sw_hmac_algo;
bool use_sw_aes_ccm_algo;
bool clk_mgmt_sus_res;
unsigned int ce_device;
unsigned int ce_hw_instance;
unsigned int max_request;
};
/* Sha operation parameters */
struct qce_sha_req {
qce_comp_func_ptr_t qce_cb; /* call back */
enum qce_hash_alg_enum alg; /* sha algorithm */
unsigned char *digest; /* sha digest */
struct scatterlist *src; /* pointer to scatter list entry */
uint32_t auth_data[4]; /* byte count */
unsigned char *authkey; /* auth key */
unsigned int authklen; /* auth key length */
bool first_blk; /* first block indicator */
bool last_blk; /* last block indicator */
unsigned int size; /* data length in bytes */
void *areq;
unsigned int flags;
};
struct qce_req {
enum qce_req_op_enum op; /* operation type */
qce_comp_func_ptr_t qce_cb; /* call back */
void *areq;
enum qce_cipher_alg_enum alg; /* cipher algorithms*/
enum qce_cipher_dir_enum dir; /* encryption? decryption? */
enum qce_cipher_mode_enum mode; /* algorithm mode */
enum qce_hash_alg_enum auth_alg;/* authentication algorithm for aead */
unsigned char *authkey; /* authentication key */
unsigned int authklen; /* authentication key kength */
unsigned int authsize; /* authentication key kength */
unsigned char nonce[MAX_NONCE];/* nonce for ccm mode */
unsigned char *assoc; /* Ptr to formatted associated data */
unsigned int assoclen; /* Formatted associated data length */
struct scatterlist *asg; /* Formatted associated data sg */
unsigned char *enckey; /* cipher key */
unsigned int encklen; /* cipher key length */
unsigned char *iv; /* initialization vector */
unsigned int ivsize; /* initialization vector size*/
unsigned int cryptlen; /* data length */
unsigned int use_pmem; /* is source of data PMEM allocated? */
struct qcedev_pmem_info *pmem; /* pointer to pmem_info structure*/
unsigned int flags;
};
struct qce_pm_table {
int (*suspend)(void *handle);
int (*resume)(void *handle);
};
extern struct qce_pm_table qce_pm_table;
void *qce_open(struct platform_device *pdev, int *rc);
int qce_close(void *handle);
int qce_aead_req(void *handle, struct qce_req *req);
int qce_ablk_cipher_req(void *handle, struct qce_req *req);
int qce_hw_support(void *handle, struct ce_hw_support *support);
int qce_process_sha_req(void *handle, struct qce_sha_req *s_req);
int qce_enable_clk(void *handle);
int qce_disable_clk(void *handle);
void qce_get_driver_stats(void *handle);
void qce_clear_driver_stats(void *handle);
#endif /* __CRYPTO_MSM_QCE_H */
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