linux-imx

/*

 * Cryptographic API.

 *

 * Driver for EIP97 SHA1/SHA2(HMAC) acceleration.

 *

 * Copyright (c) 2016 Ryder Lee <ryder.lee@mediatek.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * Some ideas are from atmel-sha.c and omap-sham.c drivers.

 */

​

#include <crypto/hmac.h>

#include <crypto/sha.h>

#include "mtk-platform.h"

​

#define SHA_ALIGN_MSK       (sizeof(u32) - 1)

#define SHA_QUEUE_SIZE      512

#define SHA_BUF_SIZE        ((u32)PAGE_SIZE)

​

#define SHA_OP_UPDATE       1

#define SHA_OP_FINAL        2

​

#define SHA_DATA_LEN_MSK    cpu_to_le32(GENMASK(16, 0))

#define SHA_MAX_DIGEST_BUF_SIZE 32

​

/* SHA command token */

#define SHA_CT_SIZE     5

#define SHA_CT_CTRL_HDR     cpu_to_le32(0x02220000)

#define SHA_CMD0        cpu_to_le32(0x03020000)

#define SHA_CMD1        cpu_to_le32(0x21060000)

#define SHA_CMD2        cpu_to_le32(0xe0e63802)

​

/* SHA transform information */

#define SHA_TFM_HASH        cpu_to_le32(0x2 << 0)

#define SHA_TFM_SIZE(x)     cpu_to_le32((x) << 8)

#define SHA_TFM_START       cpu_to_le32(0x1 << 4)

#define SHA_TFM_CONTINUE    cpu_to_le32(0x1 << 5)

#define SHA_TFM_HASH_STORE  cpu_to_le32(0x1 << 19)

#define SHA_TFM_SHA1        cpu_to_le32(0x2 << 23)

#define SHA_TFM_SHA256      cpu_to_le32(0x3 << 23)

#define SHA_TFM_SHA224      cpu_to_le32(0x4 << 23)

#define SHA_TFM_SHA512      cpu_to_le32(0x5 << 23)

#define SHA_TFM_SHA384      cpu_to_le32(0x6 << 23)

#define SHA_TFM_DIGEST(x)   cpu_to_le32(((x) & GENMASK(3, 0)) << 24)

​

/* SHA flags */

#define SHA_FLAGS_BUSY      BIT(0)

#define SHA_FLAGS_FINAL     BIT(1)

#define SHA_FLAGS_FINUP     BIT(2)

#define SHA_FLAGS_SG        BIT(3)

#define SHA_FLAGS_ALGO_MSK  GENMASK(8, 4)

#define SHA_FLAGS_SHA1      BIT(4)

#define SHA_FLAGS_SHA224    BIT(5)

#define SHA_FLAGS_SHA256    BIT(6)

#define SHA_FLAGS_SHA384    BIT(7)

#define SHA_FLAGS_SHA512    BIT(8)

#define SHA_FLAGS_HMAC      BIT(9)

#define SHA_FLAGS_PAD       BIT(10)

​

/**

 * mtk_sha_info - hardware information of AES

 * @cmd:    command token, hardware instruction

 * @tfm:    transform state of cipher algorithm.

 * @state:  contains keys and initial vectors.

 *

 */

struct mtk_sha_info {

    __le32 ctrl[2];

    __le32 cmd[3];

    __le32 tfm[2];

    __le32 digest[SHA_MAX_DIGEST_BUF_SIZE];

};

​

struct mtk_sha_reqctx {

    struct mtk_sha_info info;

    unsigned long flags;

    unsigned long op;

​

    u64 digcnt;

    size_t bufcnt;

    dma_addr_t dma_addr;

​

    __le32 ct_hdr;

    u32 ct_size;

    dma_addr_t ct_dma;

    dma_addr_t tfm_dma;

​

    /* Walk state */

    struct scatterlist *sg;