/*
 * Keystone crypto accelerator driver
 *
 * Copyright (C) 2013-2016 Texas Instruments Incorporated - http://www.ti.com
 * Contact: Sandeep Nair <sandeep_n@ti.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.
 *
 * 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 _KEYSTONE_SA_H_
#define _KEYSTONE_SA_H_

/*
 * This type represents the various packet types to be processed
 * by the PHP engine in SA.
 * It is used to identify the corresponding PHP processing function.
 */
#define SA_CTX_PE_PKT_TYPE_3GPP_AIR    0    /* 3GPP Air Cipher */
#define SA_CTX_PE_PKT_TYPE_SRTP        1    /* SRTP */
#define SA_CTX_PE_PKT_TYPE_IPSEC_AH    2    /* IPSec Authentication Header */
/* IPSec Encapsulating Security Payload */
#define SA_CTX_PE_PKT_TYPE_IPSEC_ESP   3
/* Indicates that it is in data mode, It may not be used by PHP */
#define SA_CTX_PE_PKT_TYPE_NONE        4
#define SA_CTX_ENC_TYPE1_SZ	64	/* Encryption SC with Key only */
#define SA_CTX_ENC_TYPE2_SZ	96	/* Encryption SC with Key and Aux1 */

#define SA_CTX_AUTH_TYPE1_SZ	64	/* Auth SC with Key only */
#define SA_CTX_AUTH_TYPE2_SZ	96	/* Auth SC with Key and Aux1 */
/* Size of security context for PHP engine */
#define SA_CTX_PHP_PE_CTX_SZ	64

#define SA_CTX_MAX_SZ (64 + SA_CTX_ENC_TYPE2_SZ + SA_CTX_AUTH_TYPE2_SZ)

/*
 * Encoding of F/E control in SCCTL
 *  Bit 0-1: Fetch PHP Bytes
 *  Bit 2-3: Fetch Encryption/Air Ciphering Bytes
 *  Bit 4-5: Fetch Authentication Bytes or Encr pass 2
 *  Bit 6-7: Evict PHP Bytes
 *
 *  where   00 = 0 bytes
 *          01 = 64 bytes
 *          10 = 96 bytes
 *          11 = 128 bytes
 */
#define SA_CTX_DMA_SIZE_0       0
#define SA_CTX_DMA_SIZE_64      1
#define SA_CTX_DMA_SIZE_96      2
#define SA_CTX_DMA_SIZE_128     3

#define SA_CTX_SCCTL_MK_DMA_INFO(php_f, eng0_f, eng1_f, php_e) \
	((php_f) | \
	 ((eng0_f) << 2) | \
	 ((eng1_f) << 4) | \
	 ((php_e) << 6))

/*
 * Byte offset of the owner word in SCCTL
 * in the security context
 */
#define SA_CTX_SCCTL_OWNER_OFFSET 0

/*
 * Assumption: CTX size is multiple of 32
 */
#define SA_CTX_SIZE_TO_DMA_SIZE(ctx_sz)	\
	((ctx_sz) ? ((ctx_sz) / 32 - 1) : 0)

#define SA_CTX_ENC_KEY_OFFSET 32
#define SA_CTX_ENC_AUX1_OFFSET 64
#define SA_CTX_ENC_AUX2_OFFSET 96
#define SA_CTX_ENC_AUX3_OFFSET 112
#define SA_CTX_ENC_AUX4_OFFSET 128

/* Next Engine Select code in CP_ACE */
#define SA_ENG_ID_EM1 2	/* Enc/Dec engine with AES/DEC core */
#define SA_ENG_ID_EM2 3	/* Encryption/Decryption enginefor pass 2 */
#define SA_ENG_ID_AM1 4	/* Auth. engine with SHA1/MD5/SHA2 core */
#define SA_ENG_ID_AM2 5	/* Authentication engine for pass 2 */
#define SA_ENG_ID_OUTPORT2 20 /* Egress module 2 */
#define SA_ENG_ID_NONE 0xff

/*
 * Command Label Definitions
 */
#define SA_CMDL_OFFSET_NESC 0 /* Next Engine Select Code */
#define SA_CMDL_OFFSET_LABEL_LEN 1 /* Engine Command Label Length */
/* 16-bit Length of Data to be processed */
#define SA_CMDL_OFFSET_DATA_LEN 2
#define SA_CMDL_OFFSET_DATA_OFFSET 4 /* Stat Data Offset */
#define SA_CMDL_OFFSET_OPTION_CTRL1 5 /* Option Control Byte 1 */
#define SA_CMDL_OFFSET_OPTION_CTRL2 6 /* Option Control Byte 2 */
#define SA_CMDL_OFFSET_OPTION_CTRL3 7 /* Option Control Byte 3 */
#define SA_CMDL_OFFSET_OPTION_BYTE 8

#define SA_CMDL_HEADER_SIZE_BYTES 8

#define SA_CMDL_OPTION_BYTES_MAX_SIZE 72
#define SA_CMDL_MAX_SIZE_BYTES (SA_CMDL_HEADER_SIZE_BYTES + \
				SA_CMDL_OPTION_BYTES_MAX_SIZE)

/* SWINFO word-0 flags */
#define SA_SW_INFO_FLAG_EVICT	0x0001
#define SA_SW_INFO_FLAG_TEAR	0x0002
#define SA_SW_INFO_FLAG_NOPD	0x0004

#define SA_CMD_ENCSS_EN		0x00000001
#define SA_CMD_AUTHSS_EN	0x00000002
#define SA_CMD_AIRSS_EN		0x00000004
#define SA_CMD_TRNG_EN		0x00000008
#define SA_CMD_PKA_EN		0x00000010
#define SA_CMD_PHP1SS_EN	0x00000020
#define SA_CMD_PHP2SS_EN	0x00000040
#define SA_CMD_CTXCACH_EN	0x00000080
#define SA_CMD_SA1_IN_EN	0x00000100
#define SA_CMD_SA0_IN_EN	0x00000200
#define SA_CMD_SA1_OUT_EN	0x00000400
#define SA_CMD_SA0_OUT_EN	0x00000800

#endif