linux-imx

/*

 * Driver for EIP97 cryptographic accelerator.

 *

 * 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.

 *

 */

​

#ifndef __MTK_PLATFORM_H_

#define __MTK_PLATFORM_H_

​

#include <crypto/algapi.h>

#include <crypto/internal/aead.h>

#include <crypto/internal/hash.h>

#include <crypto/scatterwalk.h>

#include <crypto/skcipher.h>

#include <linux/crypto.h>

#include <linux/dma-mapping.h>

#include <linux/interrupt.h>

#include <linux/scatterlist.h>

#include "mtk-regs.h"

​

#define MTK_RDR_PROC_THRESH BIT(0)

#define MTK_RDR_PROC_MODE   BIT(23)

#define MTK_CNT_RST     BIT(31)

#define MTK_IRQ_RDR0        BIT(1)

#define MTK_IRQ_RDR1        BIT(3)

#define MTK_IRQ_RDR2        BIT(5)

#define MTK_IRQ_RDR3        BIT(7)

​

#define SIZE_IN_WORDS(x)    ((x) >> 2)

​

/**

 * Ring 0/1 are used by AES encrypt and decrypt.

 * Ring 2/3 are used by SHA.

 */

enum {

    MTK_RING0,

    MTK_RING1,

    MTK_RING2,

    MTK_RING3,

    MTK_RING_MAX

};

​

#define MTK_REC_NUM     (MTK_RING_MAX / 2)

#define MTK_IRQ_NUM     5

​

/**

 * struct mtk_desc - DMA descriptor

 * @hdr:    the descriptor control header

 * @buf:    DMA address of input buffer segment

 * @ct:     DMA address of command token that control operation flow

 * @ct_hdr: the command token control header

 * @tag:    the user-defined field

 * @tfm:    DMA address of transform state

 * @bound:  align descriptors offset boundary

 *

 * Structure passed to the crypto engine to describe where source

 * data needs to be fetched and how it needs to be processed.

 */

struct mtk_desc {

    __le32 hdr;

    __le32 buf;

    __le32 ct;

    __le32 ct_hdr;

    __le32 tag;

    __le32 tfm;

    __le32 bound[2];

};

​

#define MTK_DESC_NUM        512

#define MTK_DESC_OFF        SIZE_IN_WORDS(sizeof(struct mtk_desc))

#define MTK_DESC_SZ     (MTK_DESC_OFF - 2)

#define MTK_DESC_RING_SZ    ((sizeof(struct mtk_desc) * MTK_DESC_NUM))

#define MTK_DESC_CNT(x)     ((MTK_DESC_OFF * (x)) << 2)

#define MTK_DESC_LAST       cpu_to_le32(BIT(22))

#define MTK_DESC_FIRST      cpu_to_le32(BIT(23))

#define MTK_DESC_BUF_LEN(x) cpu_to_le32(x)

#define MTK_DESC_CT_LEN(x)  cpu_to_le32((x) << 24)

​

/**

 * struct mtk_ring - Descriptor ring

 * @cmd_base:   pointer to command descriptor ring base

 * @cmd_next:   pointer to the next command descriptor

 * @cmd_dma:    DMA address of command descriptor ring

 * @res_base:   pointer to result descriptor ring base

 * @res_next:   pointer to the next result descriptor

 * @res_prev:   pointer to the previous result descriptor

 * @res_dma:    DMA address of result descriptor ring