LXR linux/drivers/crypto/sa2ul.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * K3 SA2UL crypto accelerator driver
   4 *
   5 * Copyright (C) 2018-2020 Texas Instruments Incorporated - http://www.ti.com
   6 *
   7 * Authors:     Keerthy
   8 *              Vitaly Andrianov
   9 *              Tero Kristo
  10 */
  11
  12#ifndef _K3_SA2UL_
  13#define _K3_SA2UL_
  14
  15#include <crypto/aes.h>
  16#include <crypto/sha1.h>
  17#include <crypto/sha2.h>
  18
  19#define SA_ENGINE_ENABLE_CONTROL        0x1000
  20
  21struct sa_tfm_ctx;
  22/*
  23 * SA_ENGINE_ENABLE_CONTROL register bits
  24 */
  25#define SA_EEC_ENCSS_EN                 0x00000001
  26#define SA_EEC_AUTHSS_EN                0x00000002
  27#define SA_EEC_TRNG_EN                  0x00000008
  28#define SA_EEC_PKA_EN                   0x00000010
  29#define SA_EEC_CTXCACH_EN               0x00000080
  30#define SA_EEC_CPPI_PORT_IN_EN          0x00000200
  31#define SA_EEC_CPPI_PORT_OUT_EN         0x00000800
  32
  33/*
  34 * Encoding used to identify the typo of crypto operation
  35 * performed on the packet when the packet is returned
  36 * by SA
  37 */
  38#define SA_REQ_SUBTYPE_ENC      0x0001
  39#define SA_REQ_SUBTYPE_DEC      0x0002
  40#define SA_REQ_SUBTYPE_SHIFT    16
  41#define SA_REQ_SUBTYPE_MASK     0xffff
  42
  43/* Number of 32 bit words in EPIB  */
  44#define SA_DMA_NUM_EPIB_WORDS   4
  45
  46/* Number of 32 bit words in PS data  */
  47#define SA_DMA_NUM_PS_WORDS     16
  48#define NKEY_SZ                 3
  49#define MCI_SZ                  27
  50
  51/*
  52 * Maximum number of simultaeneous security contexts
  53 * supported by the driver
  54 */
  55#define SA_MAX_NUM_CTX  512
  56
  57/*
  58 * Assumption: CTX size is multiple of 32
  59 */
  60#define SA_CTX_SIZE_TO_DMA_SIZE(ctx_sz) \
  61                ((ctx_sz) ? ((ctx_sz) / 32 - 1) : 0)
  62
  63#define SA_CTX_ENC_KEY_OFFSET   32
  64#define SA_CTX_ENC_AUX1_OFFSET  64
  65#define SA_CTX_ENC_AUX2_OFFSET  96
  66#define SA_CTX_ENC_AUX3_OFFSET  112
  67#define SA_CTX_ENC_AUX4_OFFSET  128
  68
  69/* Next Engine Select code in CP_ACE */
  70#define SA_ENG_ID_EM1   2       /* Enc/Dec engine with AES/DEC core */
  71#define SA_ENG_ID_EM2   3       /* Encryption/Decryption enginefor pass 2 */
  72#define SA_ENG_ID_AM1   4       /* Auth. engine with SHA1/MD5/SHA2 core */
  73#define SA_ENG_ID_AM2   5       /*  Authentication engine for pass 2 */
  74#define SA_ENG_ID_OUTPORT2 20   /*  Egress module 2  */
  75
  76/*
  77 * Command Label Definitions
  78 */
  79#define SA_CMDL_OFFSET_NESC           0      /* Next Engine Select Code */
  80#define SA_CMDL_OFFSET_LABEL_LEN      1      /* Engine Command Label Length */
  81/* 16-bit Length of Data to be processed */
  82#define SA_CMDL_OFFSET_DATA_LEN       2
  83#define SA_CMDL_OFFSET_DATA_OFFSET    4      /* Stat Data Offset */
  84#define SA_CMDL_OFFSET_OPTION_CTRL1   5      /* Option Control Byte 1 */
  85#define SA_CMDL_OFFSET_OPTION_CTRL2   6      /* Option Control Byte 2 */
  86#define SA_CMDL_OFFSET_OPTION_CTRL3   7      /* Option Control Byte 3 */
  87#define SA_CMDL_OFFSET_OPTION_BYTE    8
  88
  89#define SA_CMDL_HEADER_SIZE_BYTES       8
  90
  91#define SA_CMDL_OPTION_BYTES_MAX_SIZE     72
  92#define SA_CMDL_MAX_SIZE_BYTES (SA_CMDL_HEADER_SIZE_BYTES + \
  93                                SA_CMDL_OPTION_BYTES_MAX_SIZE)
  94
  95/* SWINFO word-0 flags */
  96#define SA_SW_INFO_FLAG_EVICT   0x0001
  97#define SA_SW_INFO_FLAG_TEAR    0x0002
  98#define SA_SW_INFO_FLAG_NOPD    0x0004
  99
 100/*
 101 * This type represents the various packet types to be processed
 102 * by the PHP engine in SA.
 103 * It is used to identify the corresponding PHP processing function.
 104 */
 105#define SA_CTX_PE_PKT_TYPE_3GPP_AIR    0    /* 3GPP Air Cipher */
 106#define SA_CTX_PE_PKT_TYPE_SRTP        1    /* SRTP */
 107#define SA_CTX_PE_PKT_TYPE_IPSEC_AH    2    /* IPSec Authentication Header */
 108/* IPSec Encapsulating Security Payload */
 109#define SA_CTX_PE_PKT_TYPE_IPSEC_ESP   3
 110/* Indicates that it is in data mode, It may not be used by PHP */
 111#define SA_CTX_PE_PKT_TYPE_NONE        4
 112#define SA_CTX_ENC_TYPE1_SZ     64      /* Encryption SC with Key only */
 113#define SA_CTX_ENC_TYPE2_SZ     96      /* Encryption SC with Key and Aux1 */
 114
 115#define SA_CTX_AUTH_TYPE1_SZ    64      /* Auth SC with Key only */
 116#define SA_CTX_AUTH_TYPE2_SZ    96      /* Auth SC with Key and Aux1 */
 117/* Size of security context for PHP engine */
 118#define SA_CTX_PHP_PE_CTX_SZ    64
 119
 120#define SA_CTX_MAX_SZ (64 + SA_CTX_ENC_TYPE2_SZ + SA_CTX_AUTH_TYPE2_SZ)
 121
 122/*
 123 * Encoding of F/E control in SCCTL
 124 *  Bit 0-1: Fetch PHP Bytes
 125 *  Bit 2-3: Fetch Encryption/Air Ciphering Bytes
 126 *  Bit 4-5: Fetch Authentication Bytes or Encr pass 2
 127 *  Bit 6-7: Evict PHP Bytes
 128 *
 129 *  where   00 = 0 bytes
 130 *          01 = 64 bytes
 131 *          10 = 96 bytes
 132 *          11 = 128 bytes
 133 */
 134#define SA_CTX_DMA_SIZE_0       0
 135#define SA_CTX_DMA_SIZE_64      1
 136#define SA_CTX_DMA_SIZE_96      2
 137#define SA_CTX_DMA_SIZE_128     3
 138
 139/*
 140 * Byte offset of the owner word in SCCTL
 141 * in the security context
 142 */
 143#define SA_CTX_SCCTL_OWNER_OFFSET 0
 144
 145#define SA_CTX_ENC_KEY_OFFSET   32
 146#define SA_CTX_ENC_AUX1_OFFSET  64
 147#define SA_CTX_ENC_AUX2_OFFSET  96
 148#define SA_CTX_ENC_AUX3_OFFSET  112
 149#define SA_CTX_ENC_AUX4_OFFSET  128
 150
 151#define SA_SCCTL_FE_AUTH_ENC    0x65
 152#define SA_SCCTL_FE_ENC         0x8D
 153
 154#define SA_ALIGN_MASK           (sizeof(u32) - 1)
 155#define SA_ALIGNED              __aligned(32)
 156
 157#define SA_AUTH_SW_CTRL_MD5     1
 158#define SA_AUTH_SW_CTRL_SHA1    2
 159#define SA_AUTH_SW_CTRL_SHA224  3
 160#define SA_AUTH_SW_CTRL_SHA256  4
 161#define SA_AUTH_SW_CTRL_SHA384  5
 162#define SA_AUTH_SW_CTRL_SHA512  6
 163
 164/* SA2UL can only handle maximum data size of 64KB */
 165#define SA_MAX_DATA_SZ          U16_MAX
 166
 167/*
 168 * SA2UL can provide unpredictable results with packet sizes that fall
 169 * the following range, so avoid using it.
 170 */
 171#define SA_UNSAFE_DATA_SZ_MIN   240
 172#define SA_UNSAFE_DATA_SZ_MAX   256
 173
 174/**
 175 * struct sa_crypto_data - Crypto driver instance data
 176 * @base: Base address of the register space
 177 * @pdev: Platform device pointer
 178 * @sc_pool: security context pool
 179 * @dev: Device pointer
 180 * @scid_lock: secure context ID lock
 181 * @sc_id_start: starting index for SC ID
 182 * @sc_id_end: Ending index for SC ID
 183 * @sc_id: Security Context ID
 184 * @ctx_bm: Bitmap to keep track of Security context ID's
 185 * @ctx: SA tfm context pointer
 186 * @dma_rx1: Pointer to DMA rx channel for sizes < 256 Bytes
 187 * @dma_rx2: Pointer to DMA rx channel for sizes > 256 Bytes
 188 * @dma_tx: Pointer to DMA TX channel
 189 */
 190struct sa_crypto_data {
 191        void __iomem *base;
 192        struct platform_device  *pdev;
 193        struct dma_pool         *sc_pool;
 194        struct device *dev;
 195        spinlock_t      scid_lock; /* lock for SC-ID allocation */
 196        /* Security context data */
 197        u16             sc_id_start;
 198        u16             sc_id_end;
 199        u16             sc_id;
 200        unsigned long   ctx_bm[DIV_ROUND_UP(SA_MAX_NUM_CTX,
 201                                BITS_PER_LONG)];
 202        struct sa_tfm_ctx       *ctx;
 203        struct dma_chan         *dma_rx1;
 204        struct dma_chan         *dma_rx2;
 205        struct dma_chan         *dma_tx;
 206};
 207
 208/**
 209 * struct sa_cmdl_param_info: Command label parameters info
 210 * @index: Index of the parameter in the command label format
 211 * @offset: the offset of the parameter
 212 * @size: Size of the parameter
 213 */
 214struct sa_cmdl_param_info {
 215        u16     index;
 216        u16     offset;
 217        u16     size;
 218};
 219
 220/* Maximum length of Auxiliary data in 32bit words */
 221#define SA_MAX_AUX_DATA_WORDS   8
 222
 223/**
 224 * struct sa_cmdl_upd_info: Command label updation info
 225 * @flags: flags in command label
 226 * @submode: Encryption submodes
 227 * @enc_size: Size of first pass encryption size
 228 * @enc_size2: Size of second pass encryption size
 229 * @enc_offset: Encryption payload offset in the packet
 230 * @enc_iv: Encryption initialization vector for pass2
 231 * @enc_iv2: Encryption initialization vector for pass2
 232 * @aad: Associated data
 233 * @payload: Payload info
 234 * @auth_size: Authentication size for pass 1
 235 * @auth_size2: Authentication size for pass 2
 236 * @auth_offset: Authentication payload offset
 237 * @auth_iv: Authentication initialization vector
 238 * @aux_key_info: Authentication aux key information
 239 * @aux_key: Aux key for authentication
 240 */
 241struct sa_cmdl_upd_info {
 242        u16     flags;
 243        u16     submode;
 244        struct sa_cmdl_param_info       enc_size;
 245        struct sa_cmdl_param_info       enc_size2;
 246        struct sa_cmdl_param_info       enc_offset;
 247        struct sa_cmdl_param_info       enc_iv;
 248        struct sa_cmdl_param_info       enc_iv2;
 249        struct sa_cmdl_param_info       aad;
 250        struct sa_cmdl_param_info       payload;
 251        struct sa_cmdl_param_info       auth_size;
 252        struct sa_cmdl_param_info       auth_size2;
 253        struct sa_cmdl_param_info       auth_offset;
 254        struct sa_cmdl_param_info       auth_iv;
 255        struct sa_cmdl_param_info       aux_key_info;
 256        u32                             aux_key[SA_MAX_AUX_DATA_WORDS];
 257};
 258
 259/*
 260 * Number of 32bit words appended after the command label
 261 * in PSDATA to identify the crypto request context.
 262 * word-0: Request type
 263 * word-1: pointer to request
 264 */
 265#define SA_PSDATA_CTX_WORDS 4
 266
 267/* Maximum size of Command label in 32 words */
 268#define SA_MAX_CMDL_WORDS (SA_DMA_NUM_PS_WORDS - SA_PSDATA_CTX_WORDS)
 269
 270/**
 271 * struct sa_ctx_info: SA context information
 272 * @sc: Pointer to security context
 273 * @sc_phys: Security context physical address that is passed on to SA2UL
 274 * @sc_id: Security context ID
 275 * @cmdl_size: Command label size
 276 * @cmdl: Command label for a particular iteration
 277 * @cmdl_upd_info: structure holding command label updation info
 278 * @epib: Extended protocol information block words
 279 */
 280struct sa_ctx_info {
 281        u8              *sc;
 282        dma_addr_t      sc_phys;
 283        u16             sc_id;
 284        u16             cmdl_size;
 285        u32             cmdl[SA_MAX_CMDL_WORDS];
 286        struct sa_cmdl_upd_info cmdl_upd_info;
 287        /* Store Auxiliary data such as K2/K3 subkeys in AES-XCBC */
 288        u32             epib[SA_DMA_NUM_EPIB_WORDS];
 289};
 290
 291/**
 292 * struct sa_tfm_ctx: TFM context structure
 293 * @dev_data: struct sa_crypto_data pointer
 294 * @enc: struct sa_ctx_info for encryption
 295 * @dec: struct sa_ctx_info for decryption
 296 * @keylen: encrption/decryption keylength
 297 * @iv_idx: Initialization vector index
 298 * @key: encryption key
 299 * @fallback: SW fallback algorithm
 300 */
 301struct sa_tfm_ctx {
 302        struct sa_crypto_data *dev_data;
 303        struct sa_ctx_info enc;
 304        struct sa_ctx_info dec;
 305        struct sa_ctx_info auth;
 306        int keylen;
 307        int iv_idx;
 308        u32 key[AES_KEYSIZE_256 / sizeof(u32)];
 309        u8 authkey[SHA512_BLOCK_SIZE];
 310        struct crypto_shash     *shash;
 311        /* for fallback */
 312        union {
 313                struct crypto_skcipher          *skcipher;
 314                struct crypto_ahash             *ahash;
 315                struct crypto_aead              *aead;
 316        } fallback;
 317};
 318
 319/**
 320 * struct sa_sha_req_ctx: Structure used for sha request
 321 * @dev_data: struct sa_crypto_data pointer
 322 * @cmdl: Complete command label with psdata and epib included
 323 * @fallback_req: SW fallback request container
 324 */
 325struct sa_sha_req_ctx {
 326        struct sa_crypto_data   *dev_data;
 327        u32                     cmdl[SA_MAX_CMDL_WORDS + SA_PSDATA_CTX_WORDS];
 328        struct ahash_request    fallback_req;
 329};
 330
 331enum sa_submode {
 332        SA_MODE_GEN = 0,
 333        SA_MODE_CCM,
 334        SA_MODE_GCM,
 335        SA_MODE_GMAC
 336};
 337
 338/* Encryption algorithms */
 339enum sa_ealg_id {
 340        SA_EALG_ID_NONE = 0,        /* No encryption */
 341        SA_EALG_ID_NULL,            /* NULL encryption */
 342        SA_EALG_ID_AES_CTR,         /* AES Counter mode */
 343        SA_EALG_ID_AES_F8,          /* AES F8 mode */
 344        SA_EALG_ID_AES_CBC,         /* AES CBC mode */
 345        SA_EALG_ID_DES_CBC,         /* DES CBC mode */
 346        SA_EALG_ID_3DES_CBC,        /* 3DES CBC mode */
 347        SA_EALG_ID_CCM,             /* Counter with CBC-MAC mode */
 348        SA_EALG_ID_GCM,             /* Galois Counter mode */
 349        SA_EALG_ID_AES_ECB,
 350        SA_EALG_ID_LAST
 351};
 352
 353/* Authentication algorithms */
 354enum sa_aalg_id {
 355        SA_AALG_ID_NONE = 0,      /* No Authentication  */
 356        SA_AALG_ID_NULL = SA_EALG_ID_LAST, /* NULL Authentication  */
 357        SA_AALG_ID_MD5,           /* MD5 mode */
 358        SA_AALG_ID_SHA1,          /* SHA1 mode */
 359        SA_AALG_ID_SHA2_224,      /* 224-bit SHA2 mode */
 360        SA_AALG_ID_SHA2_256,      /* 256-bit SHA2 mode */
 361        SA_AALG_ID_SHA2_512,      /* 512-bit SHA2 mode */
 362        SA_AALG_ID_HMAC_MD5,      /* HMAC with MD5 mode */
 363        SA_AALG_ID_HMAC_SHA1,     /* HMAC with SHA1 mode */
 364        SA_AALG_ID_HMAC_SHA2_224, /* HMAC with 224-bit SHA2 mode */
 365        SA_AALG_ID_HMAC_SHA2_256, /* HMAC with 256-bit SHA2 mode */
 366        SA_AALG_ID_GMAC,          /* Galois Message Auth. Code mode */
 367        SA_AALG_ID_CMAC,          /* Cipher-based Mes. Auth. Code mode */
 368        SA_AALG_ID_CBC_MAC,       /* Cipher Block Chaining */
 369        SA_AALG_ID_AES_XCBC       /* AES Extended Cipher Block Chaining */
 370};
 371
 372/*
 373 * Mode control engine algorithms used to index the
 374 * mode control instruction tables
 375 */
 376enum sa_eng_algo_id {
 377        SA_ENG_ALGO_ECB = 0,
 378        SA_ENG_ALGO_CBC,
 379        SA_ENG_ALGO_CFB,
 380        SA_ENG_ALGO_OFB,
 381        SA_ENG_ALGO_CTR,
 382        SA_ENG_ALGO_F8,
 383        SA_ENG_ALGO_F8F9,
 384        SA_ENG_ALGO_GCM,
 385        SA_ENG_ALGO_GMAC,
 386        SA_ENG_ALGO_CCM,
 387        SA_ENG_ALGO_CMAC,
 388        SA_ENG_ALGO_CBCMAC,
 389        SA_NUM_ENG_ALGOS
 390};
 391
 392/**
 393 * struct sa_eng_info: Security accelerator engine info
 394 * @eng_id: Engine ID
 395 * @sc_size: security context size
 396 */
 397struct sa_eng_info {
 398        u8      eng_id;
 399        u16     sc_size;
 400};
 401
 402#endif /* _K3_SA2UL_ */
 403