linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * Freescale FSL CAAM support for crypto API over QI backend.

 * Based on caamalg.c

 *

 * Copyright 2013-2016 Freescale Semiconductor, Inc.

 * Copyright 2016-2018 NXP

 */

​

#include "compat.h"

#include "ctrl.h"

#include "regs.h"

#include "intern.h"

#include "desc_constr.h"

#include "error.h"

#include "sg_sw_qm.h"

#include "key_gen.h"

#include "qi.h"

#include "jr.h"

#include "caamalg_desc.h"

​

/*

 * crypto alg

 */

#define CAAM_CRA_PRIORITY       2000

/* max key is sum of AES_MAX_KEY_SIZE, max split key size */

#define CAAM_MAX_KEY_SIZE       (AES_MAX_KEY_SIZE + \

                     SHA512_DIGEST_SIZE * 2)

​

#define DESC_MAX_USED_BYTES     (DESC_QI_AEAD_GIVENC_LEN + \

                     CAAM_MAX_KEY_SIZE)

#define DESC_MAX_USED_LEN       (DESC_MAX_USED_BYTES / CAAM_CMD_SZ)

​

struct caam_alg_entry {

    int class1_alg_type;

    int class2_alg_type;

    bool rfc3686;

    bool geniv;

};

​

struct caam_aead_alg {

    struct aead_alg aead;

    struct caam_alg_entry caam;

    bool registered;

};

​

struct caam_skcipher_alg {

    struct skcipher_alg skcipher;

    struct caam_alg_entry caam;

    bool registered;

};

​

/*

 * per-session context

 */

struct caam_ctx {

    struct device *jrdev;

    u32 sh_desc_enc[DESC_MAX_USED_LEN];

    u32 sh_desc_dec[DESC_MAX_USED_LEN];

    u8 key[CAAM_MAX_KEY_SIZE];

    dma_addr_t key_dma;

    enum dma_data_direction dir;

    struct alginfo adata;