LXR linux/drivers/crypto/amcc/crypto4xx

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/**
   3 * AMCC SoC PPC4xx Crypto Driver
   4 *
   5 * Copyright (c) 2008 Applied Micro Circuits Corporation.
   6 * All rights reserved. James Hsiao <jhsiao@amcc.com>
   7 *
   8 * This is the header file for AMCC Crypto offload Linux device driver for
   9 * use with Linux CryptoAPI.
  10
  11 */
  12
  13#ifndef __CRYPTO4XX_CORE_H__
  14#define __CRYPTO4XX_CORE_H__
  15
  16#include <linux/ratelimit.h>
  17#include <linux/mutex.h>
  18#include <crypto/internal/hash.h>
  19#include <crypto/internal/aead.h>
  20#include <crypto/internal/rng.h>
  21#include <crypto/internal/skcipher.h>
  22#include "crypto4xx_reg_def.h"
  23#include "crypto4xx_sa.h"
  24
  25#define PPC460SX_SDR0_SRST                      0x201
  26#define PPC405EX_SDR0_SRST                      0x200
  27#define PPC460EX_SDR0_SRST                      0x201
  28#define PPC460EX_CE_RESET                       0x08000000
  29#define PPC460SX_CE_RESET                       0x20000000
  30#define PPC405EX_CE_RESET                       0x00000008
  31
  32#define CRYPTO4XX_CRYPTO_PRIORITY               300
  33#define PPC4XX_NUM_PD                           256
  34#define PPC4XX_LAST_PD                          (PPC4XX_NUM_PD - 1)
  35#define PPC4XX_NUM_GD                           1024
  36#define PPC4XX_LAST_GD                          (PPC4XX_NUM_GD - 1)
  37#define PPC4XX_NUM_SD                           256
  38#define PPC4XX_LAST_SD                          (PPC4XX_NUM_SD - 1)
  39#define PPC4XX_SD_BUFFER_SIZE                   2048
  40
  41#define PD_ENTRY_BUSY                           BIT(1)
  42#define PD_ENTRY_INUSE                          BIT(0)
  43#define PD_ENTRY_FREE                           0
  44#define ERING_WAS_FULL                          0xffffffff
  45
  46struct crypto4xx_device;
  47
  48union shadow_sa_buf {
  49        struct dynamic_sa_ctl sa;
  50
  51        /* alloc 256 bytes which is enough for any kind of dynamic sa */
  52        u8 buf[256];
  53} __packed;
  54
  55struct pd_uinfo {
  56        struct crypto4xx_device *dev;
  57        u32   state;
  58        u32 first_gd;           /* first gather discriptor
  59                                used by this packet */
  60        u32 num_gd;             /* number of gather discriptor
  61                                used by this packet */
  62        u32 first_sd;           /* first scatter discriptor
  63                                used by this packet */
  64        u32 num_sd;             /* number of scatter discriptors
  65                                used by this packet */
  66        struct dynamic_sa_ctl *sa_va;   /* shadow sa */
  67        struct sa_state_record *sr_va;  /* state record for shadow sa */
  68        u32 sr_pa;
  69        struct scatterlist *dest_va;
  70        struct crypto_async_request *async_req;         /* base crypto request
  71                                                        for this packet */
  72};
  73
  74struct crypto4xx_device {
  75        struct crypto4xx_core_device *core_dev;
  76        void __iomem *ce_base;
  77        void __iomem *trng_base;
  78
  79        struct ce_pd *pdr;      /* base address of packet descriptor ring */
  80        dma_addr_t pdr_pa;      /* physical address of pdr_base_register */
  81        struct ce_gd *gdr;      /* gather descriptor ring */
  82        dma_addr_t gdr_pa;      /* physical address of gdr_base_register */
  83        struct ce_sd *sdr;      /* scatter descriptor ring */
  84        dma_addr_t sdr_pa;      /* physical address of sdr_base_register */
  85        void *scatter_buffer_va;
  86        dma_addr_t scatter_buffer_pa;
  87
  88        union shadow_sa_buf *shadow_sa_pool;
  89        dma_addr_t shadow_sa_pool_pa;
  90        struct sa_state_record *shadow_sr_pool;
  91        dma_addr_t shadow_sr_pool_pa;
  92        u32 pdr_tail;
  93        u32 pdr_head;
  94        u32 gdr_tail;
  95        u32 gdr_head;
  96        u32 sdr_tail;
  97        u32 sdr_head;
  98        struct pd_uinfo *pdr_uinfo;
  99        struct list_head alg_list;      /* List of algorithm supported
 100                                        by this device */
 101        struct ratelimit_state aead_ratelimit;
 102        bool is_revb;
 103};
 104
 105struct crypto4xx_core_device {
 106        struct device *device;
 107        struct platform_device *ofdev;
 108        struct crypto4xx_device *dev;
 109        struct hwrng *trng;
 110        u32 int_status;
 111        u32 irq;
 112        struct tasklet_struct tasklet;
 113        spinlock_t lock;
 114        struct mutex rng_lock;
 115};
 116
 117struct crypto4xx_ctx {
 118        struct crypto4xx_device *dev;
 119        struct dynamic_sa_ctl *sa_in;
 120        struct dynamic_sa_ctl *sa_out;
 121        __le32 iv_nonce;
 122        u32 sa_len;
 123        union {
 124                struct crypto_sync_skcipher *cipher;
 125                struct crypto_aead *aead;
 126        } sw_cipher;
 127};
 128
 129struct crypto4xx_aead_reqctx {
 130        struct scatterlist dst[2];
 131};
 132
 133struct crypto4xx_alg_common {
 134        u32 type;
 135        union {
 136                struct skcipher_alg cipher;
 137                struct ahash_alg hash;
 138                struct aead_alg aead;
 139                struct rng_alg rng;
 140        } u;
 141};
 142
 143struct crypto4xx_alg {
 144        struct list_head  entry;
 145        struct crypto4xx_alg_common alg;
 146        struct crypto4xx_device *dev;
 147};
 148
 149int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
 150void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
 151void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
 152int crypto4xx_build_pd(struct crypto_async_request *req,
 153                       struct crypto4xx_ctx *ctx,
 154                       struct scatterlist *src,
 155                       struct scatterlist *dst,
 156                       const unsigned int datalen,
 157                       const __le32 *iv, const u32 iv_len,
 158                       const struct dynamic_sa_ctl *sa,
 159                       const unsigned int sa_len,
 160                       const unsigned int assoclen,
 161                       struct scatterlist *dst_tmp);
 162int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher,
 163                             const u8 *key, unsigned int keylen);
 164int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher,
 165                             const u8 *key, unsigned int keylen);
 166int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
 167                             const u8 *key, unsigned int keylen);
 168int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher,
 169                             const u8 *key, unsigned int keylen);
 170int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher,
 171                             const u8 *key, unsigned int keylen);
 172int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
 173                             const u8 *key, unsigned int keylen);
 174int crypto4xx_encrypt_ctr(struct skcipher_request *req);
 175int crypto4xx_decrypt_ctr(struct skcipher_request *req);
 176int crypto4xx_encrypt_iv_stream(struct skcipher_request *req);
 177int crypto4xx_decrypt_iv_stream(struct skcipher_request *req);
 178int crypto4xx_encrypt_iv_block(struct skcipher_request *req);
 179int crypto4xx_decrypt_iv_block(struct skcipher_request *req);
 180int crypto4xx_encrypt_noiv_block(struct skcipher_request *req);
 181int crypto4xx_decrypt_noiv_block(struct skcipher_request *req);
 182int crypto4xx_rfc3686_encrypt(struct skcipher_request *req);
 183int crypto4xx_rfc3686_decrypt(struct skcipher_request *req);
 184int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
 185int crypto4xx_hash_digest(struct ahash_request *req);
 186int crypto4xx_hash_final(struct ahash_request *req);
 187int crypto4xx_hash_update(struct ahash_request *req);
 188int crypto4xx_hash_init(struct ahash_request *req);
 189
 190/**
 191 * Note: Only use this function to copy items that is word aligned.
 192 */
 193static inline void crypto4xx_memcpy_swab32(u32 *dst, const void *buf,
 194                                           size_t len)
 195{
 196        for (; len >= 4; buf += 4, len -= 4)
 197                *dst++ = __swab32p((u32 *) buf);
 198
 199        if (len) {
 200                const u8 *tmp = (u8 *)buf;
 201
 202                switch (len) {
 203                case 3:
 204                        *dst = (tmp[2] << 16) |
 205                               (tmp[1] << 8) |
 206                               tmp[0];
 207                        break;
 208                case 2:
 209                        *dst = (tmp[1] << 8) |
 210                               tmp[0];
 211                        break;
 212                case 1:
 213                        *dst = tmp[0];
 214                        break;
 215                default:
 216                        break;
 217                }
 218        }
 219}
 220
 221static inline void crypto4xx_memcpy_from_le32(u32 *dst, const void *buf,
 222                                              size_t len)
 223{
 224        crypto4xx_memcpy_swab32(dst, buf, len);
 225}
 226
 227static inline void crypto4xx_memcpy_to_le32(__le32 *dst, const void *buf,
 228                                            size_t len)
 229{
 230        crypto4xx_memcpy_swab32((u32 *)dst, buf, len);
 231}
 232
 233int crypto4xx_setauthsize_aead(struct crypto_aead *ciper,
 234                               unsigned int authsize);
 235int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher,
 236                             const u8 *key, unsigned int keylen);
 237int crypto4xx_encrypt_aes_ccm(struct aead_request *req);
 238int crypto4xx_decrypt_aes_ccm(struct aead_request *req);
 239int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
 240                             const u8 *key, unsigned int keylen);
 241int crypto4xx_encrypt_aes_gcm(struct aead_request *req);
 242int crypto4xx_decrypt_aes_gcm(struct aead_request *req);
 243
 244#endif
 245