/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2017 Marvell
 *
 * Antoine Tenart <antoine.tenart@free-electrons.com>
 */

#ifndef __SAFEXCEL_H__
#define __SAFEXCEL_H__

#include <crypto/aead.h>
#include <crypto/algapi.h>
#include <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <crypto/skcipher.h>

#define EIP197_HIA_VERSION_LE                   0xca35
#define EIP197_HIA_VERSION_BE                   0x35ca

/* Static configuration */
#define EIP197_DEFAULT_RING_SIZE                400
#define EIP197_MAX_TOKENS                       8
#define EIP197_MAX_RINGS                        4
#define EIP197_FETCH_COUNT                      1
#define EIP197_MAX_BATCH_SZ                     64

#define EIP197_GFP_FLAGS(base)  ((base).flags & CRYPTO_TFM_REQ_MAY_SLEEP ? \
                                 GFP_KERNEL : GFP_ATOMIC)

/* Custom on-stack requests (for invalidation) */
#define EIP197_SKCIPHER_REQ_SIZE        sizeof(struct skcipher_request) + \
                                        sizeof(struct safexcel_cipher_req)
#define EIP197_AHASH_REQ_SIZE           sizeof(struct ahash_request) + \
                                        sizeof(struct safexcel_ahash_req)
#define EIP197_AEAD_REQ_SIZE            sizeof(struct aead_request) + \
                                        sizeof(struct safexcel_cipher_req)
#define EIP197_REQUEST_ON_STACK(name, type, size) \
        char __##name##_desc[size] CRYPTO_MINALIGN_ATTR; \
        struct type##_request *name = (void *)__##name##_desc

/* Register base offsets */
#define EIP197_HIA_AIC(priv)            ((priv)->base + (priv)->offsets.hia_aic)
#define EIP197_HIA_AIC_G(priv)          ((priv)->base + (priv)->offsets.hia_aic_g)
#define EIP197_HIA_AIC_R(priv)          ((priv)->base + (priv)->offsets.hia_aic_r)
#define EIP197_HIA_AIC_xDR(priv)        ((priv)->base + (priv)->offsets.hia_aic_xdr)
#define EIP197_HIA_DFE(priv)            ((priv)->base + (priv)->offsets.hia_dfe)
#define EIP197_HIA_DFE_THR(priv)        ((priv)->base + (priv)->offsets.hia_dfe_thr)
#define EIP197_HIA_DSE(priv)            ((priv)->base + (priv)->offsets.hia_dse)
#define EIP197_HIA_DSE_THR(priv)        ((priv)->base + (priv)->offsets.hia_dse_thr)
#define EIP197_HIA_GEN_CFG(priv)        ((priv)->base + (priv)->offsets.hia_gen_cfg)
#define EIP197_PE(priv)                 ((priv)->base + (priv)->offsets.pe)

/* EIP197 base offsets */
#define EIP197_HIA_AIC_BASE             0x90000
#define EIP197_HIA_AIC_G_BASE           0x90000
#define EIP197_HIA_AIC_R_BASE           0x90800
#define EIP197_HIA_AIC_xDR_BASE         0x80000
#define EIP197_HIA_DFE_BASE             0x8c000
#define EIP197_HIA_DFE_THR_BASE         0x8c040
#define EIP197_HIA_DSE_BASE             0x8d000
#define EIP197_HIA_DSE_THR_BASE         0x8d040
#define EIP197_HIA_GEN_CFG_BASE         0xf0000
#define EIP197_PE_BASE                  0xa0000

/* EIP97 base offsets */
#define EIP97_HIA_AIC_BASE              0x0
#define EIP97_HIA_AIC_G_BASE            0x0
#define EIP97_HIA_AIC_R_BASE            0x0
#define EIP97_HIA_AIC_xDR_BASE          0x0
#define EIP97_HIA_DFE_BASE              0xf000
#define EIP97_HIA_DFE_THR_BASE          0xf200
#define EIP97_HIA_DSE_BASE              0xf400
#define EIP97_HIA_DSE_THR_BASE          0xf600
#define EIP97_HIA_GEN_CFG_BASE          0x10000
#define EIP97_PE_BASE                   0x10000

/* CDR/RDR register offsets */
#define EIP197_HIA_xDR_OFF(priv, r)             (EIP197_HIA_AIC_xDR(priv) + (r) * 0x1000)
#define EIP197_HIA_CDR(priv, r)                 (EIP197_HIA_xDR_OFF(priv, r))
#define EIP197_HIA_RDR(priv, r)                 (EIP197_HIA_xDR_OFF(priv, r) + 0x800)
#define EIP197_HIA_xDR_RING_BASE_ADDR_LO        0x0000
#define EIP197_HIA_xDR_RING_BASE_ADDR_HI        0x0004
#define EIP197_HIA_xDR_RING_SIZE                0x0018
#define EIP197_HIA_xDR_DESC_SIZE                0x001c
#define EIP197_HIA_xDR_CFG                      0x0020
#define EIP197_HIA_xDR_DMA_CFG                  0x0024
#define EIP197_HIA_xDR_THRESH                   0x0028
#define EIP197_HIA_xDR_PREP_COUNT               0x002c
#define EIP197_HIA_xDR_PROC_COUNT               0x0030
#define EIP197_HIA_xDR_PREP_PNTR                0x0034
#define EIP197_HIA_xDR_PROC_PNTR                0x0038
#define EIP197_HIA_xDR_STAT                     0x003c

/* register offsets */
#define EIP197_HIA_DFE_CFG(n)                   (0x0000 + (128 * (n)))
#define EIP197_HIA_DFE_THR_CTRL(n)              (0x0000 + (128 * (n)))
#define EIP197_HIA_DFE_THR_STAT(n)              (0x0004 + (128 * (n)))
#define EIP197_HIA_DSE_CFG(n)                   (0x0000 + (128 * (n)))
#define EIP197_HIA_DSE_THR_CTRL(n)              (0x0000 + (128 * (n)))
#define EIP197_HIA_DSE_THR_STAT(n)              (0x0004 + (128 * (n)))
#define EIP197_HIA_RA_PE_CTRL(n)                (0x0010 + (8   * (n)))
#define EIP197_HIA_RA_PE_STAT                   0x0014
#define EIP197_HIA_AIC_R_OFF(r)                 ((r) * 0x1000)
#define EIP197_HIA_AIC_R_ENABLE_CTRL(r)         (0xe008 - EIP197_HIA_AIC_R_OFF(r))
#define EIP197_HIA_AIC_R_ENABLED_STAT(r)        (0xe010 - EIP197_HIA_AIC_R_OFF(r))
#define EIP197_HIA_AIC_R_ACK(r)                 (0xe010 - EIP197_HIA_AIC_R_OFF(r))
#define EIP197_HIA_AIC_R_ENABLE_CLR(r)          (0xe014 - EIP197_HIA_AIC_R_OFF(r))
#define EIP197_HIA_AIC_G_ENABLE_CTRL            0xf808
#define EIP197_HIA_AIC_G_ENABLED_STAT           0xf810
#define EIP197_HIA_AIC_G_ACK                    0xf810
#define EIP197_HIA_MST_CTRL                     0xfff4
#define EIP197_HIA_OPTIONS                      0xfff8
#define EIP197_HIA_VERSION                      0xfffc
#define EIP197_PE_IN_DBUF_THRES(n)              (0x0000 + (0x2000 * (n)))
#define EIP197_PE_IN_TBUF_THRES(n)              (0x0100 + (0x2000 * (n)))
#define EIP197_PE_ICE_SCRATCH_RAM(n)            (0x0800 + (0x2000 * (n)))
#define EIP197_PE_ICE_PUE_CTRL(n)               (0x0c80 + (0x2000 * (n)))
#define EIP197_PE_ICE_SCRATCH_CTRL(n)           (0x0d04 + (0x2000 * (n)))
#define EIP197_PE_ICE_FPP_CTRL(n)               (0x0d80 + (0x2000 * (n)))
#define EIP197_PE_ICE_RAM_CTRL(n)               (0x0ff0 + (0x2000 * (n)))
#define EIP197_PE_EIP96_FUNCTION_EN(n)          (0x1004 + (0x2000 * (n)))
#define EIP197_PE_EIP96_CONTEXT_CTRL(n)         (0x1008 + (0x2000 * (n)))
#define EIP197_PE_EIP96_CONTEXT_STAT(n)         (0x100c + (0x2000 * (n)))
#define EIP197_PE_OUT_DBUF_THRES(n)             (0x1c00 + (0x2000 * (n)))
#define EIP197_PE_OUT_TBUF_THRES(n)             (0x1d00 + (0x2000 * (n)))
#define EIP197_MST_CTRL                         0xfff4

/* EIP197-specific registers, no indirection */
#define EIP197_CLASSIFICATION_RAMS              0xe0000
#define EIP197_TRC_CTRL                         0xf0800
#define EIP197_TRC_LASTRES                      0xf0804
#define EIP197_TRC_REGINDEX                     0xf0808
#define EIP197_TRC_PARAMS                       0xf0820
#define EIP197_TRC_FREECHAIN                    0xf0824
#define EIP197_TRC_PARAMS2                      0xf0828
#define EIP197_TRC_ECCCTRL                      0xf0830
#define EIP197_TRC_ECCSTAT                      0xf0834
#define EIP197_TRC_ECCADMINSTAT                 0xf0838
#define EIP197_TRC_ECCDATASTAT                  0xf083c
#define EIP197_TRC_ECCDATA                      0xf0840
#define EIP197_CS_RAM_CTRL                      0xf7ff0

/* EIP197_HIA_xDR_DESC_SIZE */
#define EIP197_xDR_DESC_MODE_64BIT              BIT(31)

/* EIP197_HIA_xDR_DMA_CFG */
#define EIP197_HIA_xDR_WR_RES_BUF               BIT(22)
#define EIP197_HIA_xDR_WR_CTRL_BUF              BIT(23)
#define EIP197_HIA_xDR_WR_OWN_BUF               BIT(24)
#define EIP197_HIA_xDR_CFG_WR_CACHE(n)          (((n) & 0x7) << 25)
#define EIP197_HIA_xDR_CFG_RD_CACHE(n)          (((n) & 0x7) << 29)

/* EIP197_HIA_CDR_THRESH */
#define EIP197_HIA_CDR_THRESH_PROC_PKT(n)       (n)
#define EIP197_HIA_CDR_THRESH_PROC_MODE         BIT(22)
#define EIP197_HIA_CDR_THRESH_PKT_MODE          BIT(23)
#define EIP197_HIA_CDR_THRESH_TIMEOUT(n)        ((n) << 24) /* x256 clk cycles */

/* EIP197_HIA_RDR_THRESH */
#define EIP197_HIA_RDR_THRESH_PROC_PKT(n)       (n)
#define EIP197_HIA_RDR_THRESH_PKT_MODE          BIT(23)
#define EIP197_HIA_RDR_THRESH_TIMEOUT(n)        ((n) << 24) /* x256 clk cycles */

/* EIP197_HIA_xDR_PREP_COUNT */
#define EIP197_xDR_PREP_CLR_COUNT               BIT(31)

/* EIP197_HIA_xDR_PROC_COUNT */
#define EIP197_xDR_PROC_xD_PKT_OFFSET           24
#define EIP197_xDR_PROC_xD_PKT_MASK             GENMASK(6, 0)
#define EIP197_xDR_PROC_xD_COUNT(n)             ((n) << 2)
#define EIP197_xDR_PROC_xD_PKT(n)               ((n) << 24)
#define EIP197_xDR_PROC_CLR_COUNT               BIT(31)

/* EIP197_HIA_xDR_STAT */
#define EIP197_xDR_DMA_ERR                      BIT(0)
#define EIP197_xDR_PREP_CMD_THRES               BIT(1)
#define EIP197_xDR_ERR                          BIT(2)
#define EIP197_xDR_THRESH                       BIT(4)
#define EIP197_xDR_TIMEOUT                      BIT(5)

#define EIP197_HIA_RA_PE_CTRL_RESET             BIT(31)
#define EIP197_HIA_RA_PE_CTRL_EN                BIT(30)

/* EIP197_HIA_OPTIONS */
#define EIP197_N_PES_OFFSET                     4
#define EIP197_N_PES_MASK                       GENMASK(4, 0)
#define EIP97_N_PES_MASK                        GENMASK(2, 0)

/* EIP197_HIA_AIC_R_ENABLE_CTRL */
#define EIP197_CDR_IRQ(n)                       BIT((n) * 2)
#define EIP197_RDR_IRQ(n)                       BIT((n) * 2 + 1)

/* EIP197_HIA_DFE/DSE_CFG */
#define EIP197_HIA_DxE_CFG_MIN_DATA_SIZE(n)     ((n) << 0)
#define EIP197_HIA_DxE_CFG_DATA_CACHE_CTRL(n)   (((n) & 0x7) << 4)
#define EIP197_HIA_DxE_CFG_MAX_DATA_SIZE(n)     ((n) << 8)
#define EIP197_HIA_DSE_CFG_ALWAYS_BUFFERABLE    GENMASK(15, 14)
#define EIP197_HIA_DxE_CFG_MIN_CTRL_SIZE(n)     ((n) << 16)
#define EIP197_HIA_DxE_CFG_CTRL_CACHE_CTRL(n)   (((n) & 0x7) << 20)
#define EIP197_HIA_DxE_CFG_MAX_CTRL_SIZE(n)     ((n) << 24)
#define EIP197_HIA_DFE_CFG_DIS_DEBUG            (BIT(31) | BIT(29))
#define EIP197_HIA_DSE_CFG_EN_SINGLE_WR         BIT(29)
#define EIP197_HIA_DSE_CFG_DIS_DEBUG            BIT(31)

/* EIP197_HIA_DFE/DSE_THR_CTRL */
#define EIP197_DxE_THR_CTRL_EN                  BIT(30)
#define EIP197_DxE_THR_CTRL_RESET_PE            BIT(31)

/* EIP197_HIA_AIC_G_ENABLED_STAT */
#define EIP197_G_IRQ_DFE(n)                     BIT((n) << 1)
#define EIP197_G_IRQ_DSE(n)                     BIT(((n) << 1) + 1)
#define EIP197_G_IRQ_RING                       BIT(16)
#define EIP197_G_IRQ_PE(n)                      BIT((n) + 20)

/* EIP197_HIA_MST_CTRL */
#define RD_CACHE_3BITS                          0x5
#define WR_CACHE_3BITS                          0x3
#define RD_CACHE_4BITS                          (RD_CACHE_3BITS << 1 | BIT(0))
#define WR_CACHE_4BITS                          (WR_CACHE_3BITS << 1 | BIT(0))
#define EIP197_MST_CTRL_RD_CACHE(n)             (((n) & 0xf) << 0)
#define EIP197_MST_CTRL_WD_CACHE(n)             (((n) & 0xf) << 4)
#define EIP197_MST_CTRL_TX_MAX_CMD(n)           (((n) & 0xf) << 20)
#define EIP197_MST_CTRL_BYTE_SWAP               BIT(24)
#define EIP197_MST_CTRL_NO_BYTE_SWAP            BIT(25)

/* EIP197_PE_IN_DBUF/TBUF_THRES */
#define EIP197_PE_IN_xBUF_THRES_MIN(n)          ((n) << 8)
#define EIP197_PE_IN_xBUF_THRES_MAX(n)          ((n) << 12)

/* EIP197_PE_OUT_DBUF_THRES */
#define EIP197_PE_OUT_DBUF_THRES_MIN(n)         ((n) << 0)
#define EIP197_PE_OUT_DBUF_THRES_MAX(n)         ((n) << 4)

/* EIP197_PE_ICE_SCRATCH_CTRL */
#define EIP197_PE_ICE_SCRATCH_CTRL_CHANGE_TIMER         BIT(2)
#define EIP197_PE_ICE_SCRATCH_CTRL_TIMER_EN             BIT(3)
#define EIP197_PE_ICE_SCRATCH_CTRL_CHANGE_ACCESS        BIT(24)
#define EIP197_PE_ICE_SCRATCH_CTRL_SCRATCH_ACCESS       BIT(25)

/* EIP197_PE_ICE_SCRATCH_RAM */
#define EIP197_NUM_OF_SCRATCH_BLOCKS            32

/* EIP197_PE_ICE_PUE/FPP_CTRL */
#define EIP197_PE_ICE_x_CTRL_SW_RESET                   BIT(0)
#define EIP197_PE_ICE_x_CTRL_CLR_ECC_NON_CORR           BIT(14)
#define EIP197_PE_ICE_x_CTRL_CLR_ECC_CORR               BIT(15)

/* EIP197_PE_ICE_RAM_CTRL */
#define EIP197_PE_ICE_RAM_CTRL_PUE_PROG_EN      BIT(0)
#define EIP197_PE_ICE_RAM_CTRL_FPP_PROG_EN      BIT(1)

/* EIP197_PE_EIP96_FUNCTION_EN */
#define EIP197_FUNCTION_RSVD                    (BIT(6) | BIT(15) | BIT(20) | BIT(23))
#define EIP197_PROTOCOL_HASH_ONLY               BIT(0)
#define EIP197_PROTOCOL_ENCRYPT_ONLY            BIT(1)
#define EIP197_PROTOCOL_HASH_ENCRYPT            BIT(2)
#define EIP197_PROTOCOL_HASH_DECRYPT            BIT(3)
#define EIP197_PROTOCOL_ENCRYPT_HASH            BIT(4)
#define EIP197_PROTOCOL_DECRYPT_HASH            BIT(5)
#define EIP197_ALG_ARC4                         BIT(7)
#define EIP197_ALG_AES_ECB                      BIT(8)
#define EIP197_ALG_AES_CBC                      BIT(9)
#define EIP197_ALG_AES_CTR_ICM                  BIT(10)
#define EIP197_ALG_AES_OFB                      BIT(11)
#define EIP197_ALG_AES_CFB                      BIT(12)
#define EIP197_ALG_DES_ECB                      BIT(13)
#define EIP197_ALG_DES_CBC                      BIT(14)
#define EIP197_ALG_DES_OFB                      BIT(16)
#define EIP197_ALG_DES_CFB                      BIT(17)
#define EIP197_ALG_3DES_ECB                     BIT(18)
#define EIP197_ALG_3DES_CBC                     BIT(19)
#define EIP197_ALG_3DES_OFB                     BIT(21)
#define EIP197_ALG_3DES_CFB                     BIT(22)
#define EIP197_ALG_MD5                          BIT(24)
#define EIP197_ALG_HMAC_MD5                     BIT(25)
#define EIP197_ALG_SHA1                         BIT(26)
#define EIP197_ALG_HMAC_SHA1                    BIT(27)
#define EIP197_ALG_SHA2                         BIT(28)
#define EIP197_ALG_HMAC_SHA2                    BIT(29)
#define EIP197_ALG_AES_XCBC_MAC                 BIT(30)
#define EIP197_ALG_GCM_HASH                     BIT(31)

/* EIP197_PE_EIP96_CONTEXT_CTRL */
#define EIP197_CONTEXT_SIZE(n)                  (n)
#define EIP197_ADDRESS_MODE                     BIT(8)
#define EIP197_CONTROL_MODE                     BIT(9)

/* Context Control */
struct safexcel_context_record {
        u32 control0;
        u32 control1;

        __le32 data[40];
} __packed;

/* control0 */
#define CONTEXT_CONTROL_TYPE_NULL_OUT           0x0
#define CONTEXT_CONTROL_TYPE_NULL_IN            0x1
#define CONTEXT_CONTROL_TYPE_HASH_OUT           0x2
#define CONTEXT_CONTROL_TYPE_HASH_IN            0x3
#define CONTEXT_CONTROL_TYPE_CRYPTO_OUT         0x4
#define CONTEXT_CONTROL_TYPE_CRYPTO_IN          0x5
#define CONTEXT_CONTROL_TYPE_ENCRYPT_HASH_OUT   0x6
#define CONTEXT_CONTROL_TYPE_DECRYPT_HASH_IN    0x7
#define CONTEXT_CONTROL_TYPE_HASH_ENCRYPT_OUT   0xe
#define CONTEXT_CONTROL_TYPE_HASH_DECRYPT_IN    0xf
#define CONTEXT_CONTROL_RESTART_HASH            BIT(4)
#define CONTEXT_CONTROL_NO_FINISH_HASH          BIT(5)
#define CONTEXT_CONTROL_SIZE(n)                 ((n) << 8)
#define CONTEXT_CONTROL_KEY_EN                  BIT(16)
#define CONTEXT_CONTROL_CRYPTO_ALG_DES          (0x0 << 17)
#define CONTEXT_CONTROL_CRYPTO_ALG_3DES         (0x2 << 17)
#define CONTEXT_CONTROL_CRYPTO_ALG_AES128       (0x5 << 17)
#define CONTEXT_CONTROL_CRYPTO_ALG_AES192       (0x6 << 17)
#define CONTEXT_CONTROL_CRYPTO_ALG_AES256       (0x7 << 17)
#define CONTEXT_CONTROL_DIGEST_PRECOMPUTED      (0x1 << 21)
#define CONTEXT_CONTROL_DIGEST_HMAC             (0x3 << 21)
#define CONTEXT_CONTROL_CRYPTO_ALG_MD5          (0x0 << 23)
#define CONTEXT_CONTROL_CRYPTO_ALG_SHA1         (0x2 << 23)
#define CONTEXT_CONTROL_CRYPTO_ALG_SHA224       (0x4 << 23)
#define CONTEXT_CONTROL_CRYPTO_ALG_SHA256       (0x3 << 23)
#define CONTEXT_CONTROL_CRYPTO_ALG_SHA384       (0x6 << 23)
#define CONTEXT_CONTROL_CRYPTO_ALG_SHA512       (0x5 << 23)
#define CONTEXT_CONTROL_INV_FR                  (0x5 << 24)
#define CONTEXT_CONTROL_INV_TR                  (0x6 << 24)

/* control1 */
#define CONTEXT_CONTROL_CRYPTO_MODE_ECB         (0 << 0)
#define CONTEXT_CONTROL_CRYPTO_MODE_CBC         (1 << 0)
#define CONTEXT_CONTROL_IV0                     BIT(5)
#define CONTEXT_CONTROL_IV1                     BIT(6)
#define CONTEXT_CONTROL_IV2                     BIT(7)
#define CONTEXT_CONTROL_IV3                     BIT(8)
#define CONTEXT_CONTROL_DIGEST_CNT              BIT(9)
#define CONTEXT_CONTROL_COUNTER_MODE            BIT(10)
#define CONTEXT_CONTROL_HASH_STORE              BIT(19)

/* The hash counter given to the engine in the context has a granularity of
 * 64 bits.
 */
#define EIP197_COUNTER_BLOCK_SIZE               64

/* EIP197_CS_RAM_CTRL */
#define EIP197_TRC_ENABLE_0                     BIT(4)
#define EIP197_TRC_ENABLE_1                     BIT(5)
#define EIP197_TRC_ENABLE_2                     BIT(6)
#define EIP197_TRC_ENABLE_MASK                  GENMASK(6, 4)

/* EIP197_TRC_PARAMS */
#define EIP197_TRC_PARAMS_SW_RESET              BIT(0)
#define EIP197_TRC_PARAMS_DATA_ACCESS           BIT(2)
#define EIP197_TRC_PARAMS_HTABLE_SZ(x)          ((x) << 4)
#define EIP197_TRC_PARAMS_BLK_TIMER_SPEED(x)    ((x) << 10)
#define EIP197_TRC_PARAMS_RC_SZ_LARGE(n)        ((n) << 18)

/* EIP197_TRC_FREECHAIN */
#define EIP197_TRC_FREECHAIN_HEAD_PTR(p)        (p)
#define EIP197_TRC_FREECHAIN_TAIL_PTR(p)        ((p) << 16)

/* EIP197_TRC_PARAMS2 */
#define EIP197_TRC_PARAMS2_HTABLE_PTR(p)        (p)
#define EIP197_TRC_PARAMS2_RC_SZ_SMALL(n)       ((n) << 18)

/* Cache helpers */
#define EIP197B_CS_RC_MAX                       52
#define EIP197D_CS_RC_MAX                       96
#define EIP197_CS_RC_SIZE                       (4 * sizeof(u32))
#define EIP197_CS_RC_NEXT(x)                    (x)
#define EIP197_CS_RC_PREV(x)                    ((x) << 10)
#define EIP197_RC_NULL                          0x3ff
#define EIP197B_CS_TRC_REC_WC                   59
#define EIP197D_CS_TRC_REC_WC                   64
#define EIP197B_CS_TRC_LG_REC_WC                73
#define EIP197D_CS_TRC_LG_REC_WC                80
#define EIP197B_CS_HT_WC                        64
#define EIP197D_CS_HT_WC                        256


/* Result data */
struct result_data_desc {
        u32 packet_length:17;
        u32 error_code:15;

        u8 bypass_length:4;
        u8 e15:1;
        u16 rsvd0;
        u8 hash_bytes:1;
        u8 hash_length:6;
        u8 generic_bytes:1;
        u8 checksum:1;
        u8 next_header:1;
        u8 length:1;

        u16 application_id;
        u16 rsvd1;

        u32 rsvd2;
} __packed;


/* Basic Result Descriptor format */
struct safexcel_result_desc {
        u32 particle_size:17;
        u8 rsvd0:3;
        u8 descriptor_overflow:1;
        u8 buffer_overflow:1;
        u8 last_seg:1;
        u8 first_seg:1;
        u16 result_size:8;

        u32 rsvd1;

        u32 data_lo;
        u32 data_hi;

        struct result_data_desc result_data;
} __packed;

struct safexcel_token {
        u32 packet_length:17;
        u8 stat:2;
        u16 instructions:9;
        u8 opcode:4;
} __packed;

#define EIP197_TOKEN_HASH_RESULT_VERIFY         BIT(16)

#define EIP197_TOKEN_STAT_LAST_HASH             BIT(0)
#define EIP197_TOKEN_STAT_LAST_PACKET           BIT(1)
#define EIP197_TOKEN_OPCODE_DIRECTION           0x0
#define EIP197_TOKEN_OPCODE_INSERT              0x2
#define EIP197_TOKEN_OPCODE_NOOP                EIP197_TOKEN_OPCODE_INSERT
#define EIP197_TOKEN_OPCODE_RETRIEVE            0x4
#define EIP197_TOKEN_OPCODE_VERIFY              0xd
#define EIP197_TOKEN_OPCODE_BYPASS              GENMASK(3, 0)

static inline void eip197_noop_token(struct safexcel_token *token)
{
        token->opcode = EIP197_TOKEN_OPCODE_NOOP;
        token->packet_length = BIT(2);
}

/* Instructions */
#define EIP197_TOKEN_INS_INSERT_HASH_DIGEST     0x1c
#define EIP197_TOKEN_INS_TYPE_OUTPUT            BIT(5)
#define EIP197_TOKEN_INS_TYPE_HASH              BIT(6)
#define EIP197_TOKEN_INS_TYPE_CRYTO             BIT(7)
#define EIP197_TOKEN_INS_LAST                   BIT(8)

/* Processing Engine Control Data  */
struct safexcel_control_data_desc {
        u32 packet_length:17;
        u16 options:13;
        u8 type:2;

        u16 application_id;
        u16 rsvd;

        u8 refresh:2;
        u32 context_lo:30;
        u32 context_hi;

        u32 control0;
        u32 control1;

        u32 token[EIP197_MAX_TOKENS];
} __packed;

#define EIP197_OPTION_MAGIC_VALUE       BIT(0)
#define EIP197_OPTION_64BIT_CTX         BIT(1)
#define EIP197_OPTION_CTX_CTRL_IN_CMD   BIT(8)
#define EIP197_OPTION_2_TOKEN_IV_CMD    GENMASK(11, 10)
#define EIP197_OPTION_4_TOKEN_IV_CMD    GENMASK(11, 9)

#define EIP197_TYPE_EXTENDED            0x3

/* Basic Command Descriptor format */
struct safexcel_command_desc {
        u32 particle_size:17;
        u8 rsvd0:5;
        u8 last_seg:1;
        u8 first_seg:1;
        u16 additional_cdata_size:8;

        u32 rsvd1;

        u32 data_lo;
        u32 data_hi;

        struct safexcel_control_data_desc control_data;
} __packed;

/*
 * Internal structures & functions
 */

enum eip197_fw {
        FW_IFPP = 0,
        FW_IPUE,
        FW_NB
};

struct safexcel_desc_ring {
        void *base;
        void *base_end;
        dma_addr_t base_dma;

        /* write and read pointers */
        void *write;
        void *read;

        /* descriptor element offset */
        unsigned offset;
};

enum safexcel_alg_type {
        SAFEXCEL_ALG_TYPE_SKCIPHER,
        SAFEXCEL_ALG_TYPE_AEAD,
        SAFEXCEL_ALG_TYPE_AHASH,
};

struct safexcel_config {
        u32 pes;
        u32 rings;

        u32 cd_size;
        u32 cd_offset;

        u32 rd_size;
        u32 rd_offset;
};

struct safexcel_work_data {
        struct work_struct work;
        struct safexcel_crypto_priv *priv;
        int ring;
};

struct safexcel_ring {
        spinlock_t lock;

        struct workqueue_struct *workqueue;
        struct safexcel_work_data work_data;

        /* command/result rings */
        struct safexcel_desc_ring cdr;
        struct safexcel_desc_ring rdr;

        /* result ring crypto API request */
        struct crypto_async_request **rdr_req;

        /* queue */
        struct crypto_queue queue;
        spinlock_t queue_lock;

        /* Number of requests in the engine. */
        int requests;

        /* The ring is currently handling at least one request */
        bool busy;

        /* Store for current requests when bailing out of the dequeueing
         * function when no enough resources are available.
         */
        struct crypto_async_request *req;
        struct crypto_async_request *backlog;
};

enum safexcel_eip_version {
        EIP97IES = BIT(0),
        EIP197B  = BIT(1),
        EIP197D  = BIT(2),
};

struct safexcel_register_offsets {
        u32 hia_aic;
        u32 hia_aic_g;
        u32 hia_aic_r;
        u32 hia_aic_xdr;
        u32 hia_dfe;
        u32 hia_dfe_thr;
        u32 hia_dse;
        u32 hia_dse_thr;
        u32 hia_gen_cfg;
        u32 pe;
};

enum safexcel_flags {
        EIP197_TRC_CACHE = BIT(0),
};

struct safexcel_crypto_priv {
        void __iomem *base;
        struct device *dev;
        struct clk *clk;
        struct clk *reg_clk;
        struct safexcel_config config;

        enum safexcel_eip_version version;
        struct safexcel_register_offsets offsets;
        u32 flags;

        /* context DMA pool */
        struct dma_pool *context_pool;

        atomic_t ring_used;

        struct safexcel_ring *ring;
};

struct safexcel_context {
        int (*send)(struct crypto_async_request *req, int ring,
                    int *commands, int *results);
        int (*handle_result)(struct safexcel_crypto_priv *priv, int ring,
                             struct crypto_async_request *req, bool *complete,
                             int *ret);
        struct safexcel_context_record *ctxr;
        dma_addr_t ctxr_dma;

        int ring;
        bool needs_inv;
        bool exit_inv;
};

struct safexcel_ahash_export_state {
        u64 len[2];
        u64 processed[2];

        u32 digest;

        u32 state[SHA512_DIGEST_SIZE / sizeof(u32)];
        u8 cache[SHA512_BLOCK_SIZE];
};

/*
 * Template structure to describe the algorithms in order to register them.
 * It also has the purpose to contain our private structure and is actually
 * the only way I know in this framework to avoid having global pointers...
 */
struct safexcel_alg_template {
        struct safexcel_crypto_priv *priv;
        enum safexcel_alg_type type;
        u32 engines;
        union {
                struct skcipher_alg skcipher;
                struct aead_alg aead;
                struct ahash_alg ahash;
        } alg;
};

struct safexcel_inv_result {
        struct completion completion;
        int error;
};

void safexcel_dequeue(struct safexcel_crypto_priv *priv, int ring);
int safexcel_rdesc_check_errors(struct safexcel_crypto_priv *priv,
                                struct safexcel_result_desc *rdesc);
void safexcel_complete(struct safexcel_crypto_priv *priv, int ring);
int safexcel_invalidate_cache(struct crypto_async_request *async,
                              struct safexcel_crypto_priv *priv,
                              dma_addr_t ctxr_dma, int ring);
int safexcel_init_ring_descriptors(struct safexcel_crypto_priv *priv,
                                   struct safexcel_desc_ring *cdr,
                                   struct safexcel_desc_ring *rdr);
int safexcel_select_ring(struct safexcel_crypto_priv *priv);
void *safexcel_ring_next_rptr(struct safexcel_crypto_priv *priv,
                              struct safexcel_desc_ring *ring);
void *safexcel_ring_first_rptr(struct safexcel_crypto_priv *priv, int  ring);
void safexcel_ring_rollback_wptr(struct safexcel_crypto_priv *priv,
                                 struct safexcel_desc_ring *ring);
struct safexcel_command_desc *safexcel_add_cdesc(struct safexcel_crypto_priv *priv,
                                                 int ring_id,
                                                 bool first, bool last,
                                                 dma_addr_t data, u32 len,
                                                 u32 full_data_len,
                                                 dma_addr_t context);
struct safexcel_result_desc *safexcel_add_rdesc(struct safexcel_crypto_priv *priv,
                                                 int ring_id,
                                                bool first, bool last,
                                                dma_addr_t data, u32 len);
int safexcel_ring_first_rdr_index(struct safexcel_crypto_priv *priv,
                                  int ring);
int safexcel_ring_rdr_rdesc_index(struct safexcel_crypto_priv *priv,
                                  int ring,
                                  struct safexcel_result_desc *rdesc);
void safexcel_rdr_req_set(struct safexcel_crypto_priv *priv,
                          int ring,
                          struct safexcel_result_desc *rdesc,
                          struct crypto_async_request *req);
inline struct crypto_async_request *
safexcel_rdr_req_get(struct safexcel_crypto_priv *priv, int ring);
void safexcel_inv_complete(struct crypto_async_request *req, int error);
int safexcel_hmac_setkey(const char *alg, const u8 *key, unsigned int keylen,
                         void *istate, void *ostate);

/* available algorithms */
extern struct safexcel_alg_template safexcel_alg_ecb_des;
extern struct safexcel_alg_template safexcel_alg_cbc_des;
extern struct safexcel_alg_template safexcel_alg_ecb_des3_ede;
extern struct safexcel_alg_template safexcel_alg_cbc_des3_ede;
extern struct safexcel_alg_template safexcel_alg_ecb_aes;
extern struct safexcel_alg_template safexcel_alg_cbc_aes;
extern struct safexcel_alg_template safexcel_alg_md5;
extern struct safexcel_alg_template safexcel_alg_sha1;
extern struct safexcel_alg_template safexcel_alg_sha224;
extern struct safexcel_alg_template safexcel_alg_sha256;
extern struct safexcel_alg_template safexcel_alg_sha384;
extern struct safexcel_alg_template safexcel_alg_sha512;
extern struct safexcel_alg_template safexcel_alg_hmac_md5;
extern struct safexcel_alg_template safexcel_alg_hmac_sha1;
extern struct safexcel_alg_template safexcel_alg_hmac_sha224;
extern struct safexcel_alg_template safexcel_alg_hmac_sha256;
extern struct safexcel_alg_template safexcel_alg_hmac_sha384;
extern struct safexcel_alg_template safexcel_alg_hmac_sha512;
extern struct safexcel_alg_template safexcel_alg_authenc_hmac_sha1_cbc_aes;
extern struct safexcel_alg_template safexcel_alg_authenc_hmac_sha224_cbc_aes;
extern struct safexcel_alg_template safexcel_alg_authenc_hmac_sha256_cbc_aes;
extern struct safexcel_alg_template safexcel_alg_authenc_hmac_sha384_cbc_aes;
extern struct safexcel_alg_template safexcel_alg_authenc_hmac_sha512_cbc_aes;

#endif