drivers/crypto/caam/caamalg_desc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Shared descriptors for aead, skcipher algorithms
   4  *
   5  * Copyright 2016-2018 NXP
   6  */
   7
   8 #include "compat.h"
   9 #include "desc_constr.h"
  10 #include "caamalg_desc.h"
  11
  12 /*
  13  * For aead functions, read payload and write payload,
  14  * both of which are specified in req->src and req->dst
  15  */
  16 static inline void aead_append_src_dst(u32 *desc, u32 msg_type)
  17 {
  18         append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | KEY_VLF);
  19         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_BOTH |
  20                              KEY_VLF | msg_type | FIFOLD_TYPE_LASTBOTH);
  21 }
  22
  23 /* Set DK bit in class 1 operation if shared */
  24 static inline void append_dec_op1(u32 *desc, u32 type)
  25 {
  26         u32 *jump_cmd, *uncond_jump_cmd;
  27
  28         /* DK bit is valid only for AES */
  29         if ((type & OP_ALG_ALGSEL_MASK) != OP_ALG_ALGSEL_AES) {
  30                 append_operation(desc, type | OP_ALG_AS_INITFINAL |
  31                                  OP_ALG_DECRYPT);
  32                 return;
  33         }
  34
  35         jump_cmd = append_jump(desc, JUMP_TEST_ALL | JUMP_COND_SHRD);
  36         append_operation(desc, type | OP_ALG_AS_INITFINAL |
  37                          OP_ALG_DECRYPT);
  38         uncond_jump_cmd = append_jump(desc, JUMP_TEST_ALL);
  39         set_jump_tgt_here(desc, jump_cmd);
  40         append_operation(desc, type | OP_ALG_AS_INITFINAL |
  41                          OP_ALG_DECRYPT | OP_ALG_AAI_DK);
  42         set_jump_tgt_here(desc, uncond_jump_cmd);
  43 }
  44
  45 /**
  46  * cnstr_shdsc_aead_null_encap - IPSec ESP encapsulation shared descriptor
  47  *                               (non-protocol) with no (null) encryption.
  48  * @desc: pointer to buffer used for descriptor construction
  49  * @adata: pointer to authentication transform definitions.
  50  *         A split key is required for SEC Era < 6; the size of the split key
  51  *         is specified in this case. Valid algorithm values - one of
  52  *         OP_ALG_ALGSEL_{MD5, SHA1, SHA224, SHA256, SHA384, SHA512} ANDed
  53  *         with OP_ALG_AAI_HMAC_PRECOMP.
  54  * @icvsize: integrity check value (ICV) size (truncated or full)
  55  * @era: SEC Era
  56  */
  57 void cnstr_shdsc_aead_null_encap(u32 * const desc, struct alginfo *adata,
  58                                  unsigned int icvsize, int era)
  59 {
  60         u32 *key_jump_cmd, *read_move_cmd, *write_move_cmd;
  61
  62         init_sh_desc(desc, HDR_SHARE_SERIAL);
  63
  64         /* Skip if already shared */
  65         key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
  66                                    JUMP_COND_SHRD);
  67         if (era < 6) {
  68                 if (adata->key_inline)
  69                         append_key_as_imm(desc, adata->key_virt,
  70                                           adata->keylen_pad, adata->keylen,
  71                                           CLASS_2 | KEY_DEST_MDHA_SPLIT |
  72                                           KEY_ENC);
  73                 else
  74                         append_key(desc, adata->key_dma, adata->keylen,
  75                                    CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC);
  76         } else {
  77                 append_proto_dkp(desc, adata);
  78         }
  79         set_jump_tgt_here(desc, key_jump_cmd);
  80
  81         /* assoclen + cryptlen = seqinlen */
  82         append_math_sub(desc, REG3, SEQINLEN, REG0, CAAM_CMD_SZ);
  83
  84         /* Prepare to read and write cryptlen + assoclen bytes */
  85         append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
  86         append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);
  87
  88         /*
  89          * MOVE_LEN opcode is not available in all SEC HW revisions,
  90          * thus need to do some magic, i.e. self-patch the descriptor
  91          * buffer.
  92          */
  93         read_move_cmd = append_move(desc, MOVE_SRC_DESCBUF |
  94                                     MOVE_DEST_MATH3 |
  95                                     (0x6 << MOVE_LEN_SHIFT));
  96         write_move_cmd = append_move(desc, MOVE_SRC_MATH3 |
  97                                      MOVE_DEST_DESCBUF |
  98                                      MOVE_WAITCOMP |
  99                                      (0x8 << MOVE_LEN_SHIFT));
 100
 101         /* Class 2 operation */
 102         append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
 103                          OP_ALG_ENCRYPT);
 104
 105         /* Read and write cryptlen bytes */
 106         aead_append_src_dst(desc, FIFOLD_TYPE_MSG | FIFOLD_TYPE_FLUSH1);
 107
 108         set_move_tgt_here(desc, read_move_cmd);
 109         set_move_tgt_here(desc, write_move_cmd);
 110         append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
 111         append_move(desc, MOVE_SRC_INFIFO_CL | MOVE_DEST_OUTFIFO |
 112                     MOVE_AUX_LS);
 113
 114         /* Write ICV */
 115         append_seq_store(desc, icvsize, LDST_CLASS_2_CCB |
 116                          LDST_SRCDST_BYTE_CONTEXT);
 117
 118 #ifdef DEBUG
 119         print_hex_dump(KERN_ERR,
 120                        "aead null enc shdesc@" __stringify(__LINE__)": ",
 121                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
 122 #endif
 123 }
 124 EXPORT_SYMBOL(cnstr_shdsc_aead_null_encap);
 125
 126 /**
 127  * cnstr_shdsc_aead_null_decap - IPSec ESP decapsulation shared descriptor
 128  *                               (non-protocol) with no (null) decryption.
 129  * @desc: pointer to buffer used for descriptor construction
 130  * @adata: pointer to authentication transform definitions.
 131  *         A split key is required for SEC Era < 6; the size of the split key
 132  *         is specified in this case. Valid algorithm values - one of
 133  *         OP_ALG_ALGSEL_{MD5, SHA1, SHA224, SHA256, SHA384, SHA512} ANDed
 134  *         with OP_ALG_AAI_HMAC_PRECOMP.
 135  * @icvsize: integrity check value (ICV) size (truncated or full)
 136  * @era: SEC Era
 137  */
 138 void cnstr_shdsc_aead_null_decap(u32 * const desc, struct alginfo *adata,
 139                                  unsigned int icvsize, int era)
 140 {
 141         u32 *key_jump_cmd, *read_move_cmd, *write_move_cmd, *jump_cmd;
 142
 143         init_sh_desc(desc, HDR_SHARE_SERIAL);
 144
 145         /* Skip if already shared */
 146         key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
 147                                    JUMP_COND_SHRD);
 148         if (era < 6) {
 149                 if (adata->key_inline)
 150                         append_key_as_imm(desc, adata->key_virt,
 151                                           adata->keylen_pad, adata->keylen,
 152                                           CLASS_2 | KEY_DEST_MDHA_SPLIT |
 153                                           KEY_ENC);
 154                 else
 155                         append_key(desc, adata->key_dma, adata->keylen,
 156                                    CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC);
 157         } else {
 158                 append_proto_dkp(desc, adata);
 159         }
 160         set_jump_tgt_here(desc, key_jump_cmd);
 161
 162         /* Class 2 operation */
 163         append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
 164                          OP_ALG_DECRYPT | OP_ALG_ICV_ON);
 165
 166         /* assoclen + cryptlen = seqoutlen */
 167         append_math_sub(desc, REG2, SEQOUTLEN, REG0, CAAM_CMD_SZ);
 168
 169         /* Prepare to read and write cryptlen + assoclen bytes */
 170         append_math_add(desc, VARSEQINLEN, ZERO, REG2, CAAM_CMD_SZ);
 171         append_math_add(desc, VARSEQOUTLEN, ZERO, REG2, CAAM_CMD_SZ);
 172
 173         /*
 174          * MOVE_LEN opcode is not available in all SEC HW revisions,
 175          * thus need to do some magic, i.e. self-patch the descriptor
 176          * buffer.
 177          */
 178         read_move_cmd = append_move(desc, MOVE_SRC_DESCBUF |
 179                                     MOVE_DEST_MATH2 |
 180                                     (0x6 << MOVE_LEN_SHIFT));
 181         write_move_cmd = append_move(desc, MOVE_SRC_MATH2 |
 182                                      MOVE_DEST_DESCBUF |
 183                                      MOVE_WAITCOMP |
 184                                      (0x8 << MOVE_LEN_SHIFT));
 185
 186         /* Read and write cryptlen bytes */
 187         aead_append_src_dst(desc, FIFOLD_TYPE_MSG | FIFOLD_TYPE_FLUSH1);
 188
 189         /*
 190          * Insert a NOP here, since we need at least 4 instructions between
 191          * code patching the descriptor buffer and the location being patched.
 192          */
 193         jump_cmd = append_jump(desc, JUMP_TEST_ALL);
 194         set_jump_tgt_here(desc, jump_cmd);
 195
 196         set_move_tgt_here(desc, read_move_cmd);
 197         set_move_tgt_here(desc, write_move_cmd);
 198         append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
 199         append_move(desc, MOVE_SRC_INFIFO_CL | MOVE_DEST_OUTFIFO |
 200                     MOVE_AUX_LS);
 201         append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
 202
 203         /* Load ICV */
 204         append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS2 |
 205                              FIFOLD_TYPE_LAST2 | FIFOLD_TYPE_ICV);
 206
 207 #ifdef DEBUG
 208         print_hex_dump(KERN_ERR,
 209                        "aead null dec shdesc@" __stringify(__LINE__)": ",
 210                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
 211 #endif
 212 }
 213 EXPORT_SYMBOL(cnstr_shdsc_aead_null_decap);
 214
 215 static void init_sh_desc_key_aead(u32 * const desc,
 216                                   struct alginfo * const cdata,
 217                                   struct alginfo * const adata,
 218                                   const bool is_rfc3686, u32 *nonce, int era)
 219 {
 220         u32 *key_jump_cmd;
 221         unsigned int enckeylen = cdata->keylen;
 222
 223         /* Note: Context registers are saved. */
 224         init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
 225
 226         /* Skip if already shared */
 227         key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
 228                                    JUMP_COND_SHRD);
 229
 230         /*
 231          * RFC3686 specific:
 232          *      | key = {AUTH_KEY, ENC_KEY, NONCE}
 233          *      | enckeylen = encryption key size + nonce size
 234          */
 235         if (is_rfc3686)
 236                 enckeylen -= CTR_RFC3686_NONCE_SIZE;
 237
 238         if (era < 6) {
 239                 if (adata->key_inline)
 240                         append_key_as_imm(desc, adata->key_virt,
 241                                           adata->keylen_pad, adata->keylen,
 242                                           CLASS_2 | KEY_DEST_MDHA_SPLIT |
 243                                           KEY_ENC);
 244                 else
 245                         append_key(desc, adata->key_dma, adata->keylen,
 246                                    CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC);
 247         } else {
 248                 append_proto_dkp(desc, adata);
 249         }
 250
 251         if (cdata->key_inline)
 252                 append_key_as_imm(desc, cdata->key_virt, enckeylen,
 253                                   enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
 254         else
 255                 append_key(desc, cdata->key_dma, enckeylen, CLASS_1 |
 256                            KEY_DEST_CLASS_REG);
 257
 258         /* Load Counter into CONTEXT1 reg */
 259         if (is_rfc3686) {
 260                 append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE,
 261                                    LDST_CLASS_IND_CCB |
 262                                    LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM);
 263                 append_move(desc,
 264                             MOVE_SRC_OUTFIFO |
 265                             MOVE_DEST_CLASS1CTX |
 266                             (16 << MOVE_OFFSET_SHIFT) |
 267                             (CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT));
 268         }
 269
 270         set_jump_tgt_here(desc, key_jump_cmd);
 271 }
 272
 273 /**
 274  * cnstr_shdsc_aead_encap - IPSec ESP encapsulation shared descriptor
 275  *                          (non-protocol).
 276  * @desc: pointer to buffer used for descriptor construction
 277  * @cdata: pointer to block cipher transform definitions
 278  *         Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
 279  *         with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
 280  * @adata: pointer to authentication transform definitions.
 281  *         A split key is required for SEC Era < 6; the size of the split key
 282  *         is specified in this case. Valid algorithm values - one of
 283  *         OP_ALG_ALGSEL_{MD5, SHA1, SHA224, SHA256, SHA384, SHA512} ANDed
 284  *         with OP_ALG_AAI_HMAC_PRECOMP.
 285  * @ivsize: initialization vector size
 286  * @icvsize: integrity check value (ICV) size (truncated or full)
 287  * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
 288  * @nonce: pointer to rfc3686 nonce
 289  * @ctx1_iv_off: IV offset in CONTEXT1 register
 290  * @is_qi: true when called from caam/qi
 291  * @era: SEC Era
 292  */
 293 void cnstr_shdsc_aead_encap(u32 * const desc, struct alginfo *cdata,
 294                             struct alginfo *adata, unsigned int ivsize,
 295                             unsigned int icvsize, const bool is_rfc3686,
 296                             u32 *nonce, const u32 ctx1_iv_off, const bool is_qi,
 297                             int era)
 298 {
 299         /* Note: Context registers are saved. */
 300         init_sh_desc_key_aead(desc, cdata, adata, is_rfc3686, nonce, era);
 301
 302         /* Class 2 operation */
 303         append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
 304                          OP_ALG_ENCRYPT);
 305
 306         if (is_qi) {
 307                 u32 *wait_load_cmd;
 308
 309                 /* REG3 = assoclen */
 310                 append_seq_load(desc, 4, LDST_CLASS_DECO |
 311                                 LDST_SRCDST_WORD_DECO_MATH3 |
 312                                 (4 << LDST_OFFSET_SHIFT));
 313
 314                 wait_load_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
 315                                             JUMP_COND_CALM | JUMP_COND_NCP |
 316                                             JUMP_COND_NOP | JUMP_COND_NIP |
 317                                             JUMP_COND_NIFP);
 318                 set_jump_tgt_here(desc, wait_load_cmd);
 319
 320                 append_seq_load(desc, ivsize, LDST_CLASS_1_CCB |
 321                                 LDST_SRCDST_BYTE_CONTEXT |
 322                                 (ctx1_iv_off << LDST_OFFSET_SHIFT));
 323         }
 324
 325         /* Read and write assoclen bytes */
 326         if (is_qi || era < 3) {
 327                 append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
 328                 append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);
 329         } else {
 330                 append_math_add(desc, VARSEQINLEN, ZERO, DPOVRD, CAAM_CMD_SZ);
 331                 append_math_add(desc, VARSEQOUTLEN, ZERO, DPOVRD, CAAM_CMD_SZ);
 332         }
 333
 334         /* Skip assoc data */
 335         append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);
 336
 337         /* read assoc before reading payload */
 338         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG |
 339                                       FIFOLDST_VLF);
 340
 341         /* Load Counter into CONTEXT1 reg */
 342         if (is_rfc3686)
 343                 append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
 344                                      LDST_SRCDST_BYTE_CONTEXT |
 345                                      ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
 346                                       LDST_OFFSET_SHIFT));
 347
 348         /* Class 1 operation */
 349         append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
 350                          OP_ALG_ENCRYPT);
 351
 352         /* Read and write cryptlen bytes */
 353         append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
 354         append_math_add(desc, VARSEQOUTLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
 355         aead_append_src_dst(desc, FIFOLD_TYPE_MSG1OUT2);
 356
 357         /* Write ICV */
 358         append_seq_store(desc, icvsize, LDST_CLASS_2_CCB |
 359                          LDST_SRCDST_BYTE_CONTEXT);
 360
 361 #ifdef DEBUG
 362         print_hex_dump(KERN_ERR, "aead enc shdesc@" __stringify(__LINE__)": ",
 363                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
 364 #endif
 365 }
 366 EXPORT_SYMBOL(cnstr_shdsc_aead_encap);
 367
 368 /**
 369  * cnstr_shdsc_aead_decap - IPSec ESP decapsulation shared descriptor
 370  *                          (non-protocol).
 371  * @desc: pointer to buffer used for descriptor construction
 372  * @cdata: pointer to block cipher transform definitions
 373  *         Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
 374  *         with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
 375  * @adata: pointer to authentication transform definitions.
 376  *         A split key is required for SEC Era < 6; the size of the split key
 377  *         is specified in this case. Valid algorithm values - one of
 378  *         OP_ALG_ALGSEL_{MD5, SHA1, SHA224, SHA256, SHA384, SHA512} ANDed
 379  *         with OP_ALG_AAI_HMAC_PRECOMP.
 380  * @ivsize: initialization vector size
 381  * @icvsize: integrity check value (ICV) size (truncated or full)
 382  * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
 383  * @nonce: pointer to rfc3686 nonce
 384  * @ctx1_iv_off: IV offset in CONTEXT1 register
 385  * @is_qi: true when called from caam/qi
 386  * @era: SEC Era
 387  */
 388 void cnstr_shdsc_aead_decap(u32 * const desc, struct alginfo *cdata,
 389                             struct alginfo *adata, unsigned int ivsize,
 390                             unsigned int icvsize, const bool geniv,
 391                             const bool is_rfc3686, u32 *nonce,
 392                             const u32 ctx1_iv_off, const bool is_qi, int era)
 393 {
 394         /* Note: Context registers are saved. */
 395         init_sh_desc_key_aead(desc, cdata, adata, is_rfc3686, nonce, era);
 396
 397         /* Class 2 operation */
 398         append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
 399                          OP_ALG_DECRYPT | OP_ALG_ICV_ON);
 400
 401         if (is_qi) {
 402                 u32 *wait_load_cmd;
 403
 404                 /* REG3 = assoclen */
 405                 append_seq_load(desc, 4, LDST_CLASS_DECO |
 406                                 LDST_SRCDST_WORD_DECO_MATH3 |
 407                                 (4 << LDST_OFFSET_SHIFT));
 408
 409                 wait_load_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
 410                                             JUMP_COND_CALM | JUMP_COND_NCP |
 411                                             JUMP_COND_NOP | JUMP_COND_NIP |
 412                                             JUMP_COND_NIFP);
 413                 set_jump_tgt_here(desc, wait_load_cmd);
 414
 415                 if (!geniv)
 416                         append_seq_load(desc, ivsize, LDST_CLASS_1_CCB |
 417                                         LDST_SRCDST_BYTE_CONTEXT |
 418                                         (ctx1_iv_off << LDST_OFFSET_SHIFT));
 419         }
 420
 421         /* Read and write assoclen bytes */
 422         if (is_qi || era < 3) {
 423                 append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
 424                 if (geniv)
 425                         append_math_add_imm_u32(desc, VARSEQOUTLEN, REG3, IMM,
 426                                                 ivsize);
 427                 else
 428                         append_math_add(desc, VARSEQOUTLEN, ZERO, REG3,
 429                                         CAAM_CMD_SZ);
 430         } else {
 431                 append_math_add(desc, VARSEQINLEN, ZERO, DPOVRD, CAAM_CMD_SZ);
 432                 if (geniv)
 433                         append_math_add_imm_u32(desc, VARSEQOUTLEN, DPOVRD, IMM,
 434                                                 ivsize);
 435                 else
 436                         append_math_add(desc, VARSEQOUTLEN, ZERO, DPOVRD,
 437                                         CAAM_CMD_SZ);
 438         }
 439
 440         /* Skip assoc data */
 441         append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);
 442
 443         /* read assoc before reading payload */
 444         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG |
 445                              KEY_VLF);
 446
 447         if (geniv) {
 448                 append_seq_load(desc, ivsize, LDST_CLASS_1_CCB |
 449                                 LDST_SRCDST_BYTE_CONTEXT |
 450                                 (ctx1_iv_off << LDST_OFFSET_SHIFT));
 451                 append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_CLASS2INFIFO |
 452                             (ctx1_iv_off << MOVE_OFFSET_SHIFT) | ivsize);
 453         }
 454
 455         /* Load Counter into CONTEXT1 reg */
 456         if (is_rfc3686)
 457                 append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
 458                                      LDST_SRCDST_BYTE_CONTEXT |
 459                                      ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
 460                                       LDST_OFFSET_SHIFT));
 461
 462         /* Choose operation */
 463         if (ctx1_iv_off)
 464                 append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
 465                                  OP_ALG_DECRYPT);
 466         else
 467                 append_dec_op1(desc, cdata->algtype);
 468
 469         /* Read and write cryptlen bytes */
 470         append_math_add(desc, VARSEQINLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
 471         append_math_add(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
 472         aead_append_src_dst(desc, FIFOLD_TYPE_MSG);
 473
 474         /* Load ICV */
 475         append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS2 |
 476                              FIFOLD_TYPE_LAST2 | FIFOLD_TYPE_ICV);
 477
 478 #ifdef DEBUG
 479         print_hex_dump(KERN_ERR, "aead dec shdesc@" __stringify(__LINE__)": ",
 480                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
 481 #endif
 482 }
 483 EXPORT_SYMBOL(cnstr_shdsc_aead_decap);
 484
 485 /**
 486  * cnstr_shdsc_aead_givencap - IPSec ESP encapsulation shared descriptor
 487  *                             (non-protocol) with HW-generated initialization
 488  *                             vector.
 489  * @desc: pointer to buffer used for descriptor construction
 490  * @cdata: pointer to block cipher transform definitions
 491  *         Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
 492  *         with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
 493  * @adata: pointer to authentication transform definitions.
 494  *         A split key is required for SEC Era < 6; the size of the split key
 495  *         is specified in this case. Valid algorithm values - one of
 496  *         OP_ALG_ALGSEL_{MD5, SHA1, SHA224, SHA256, SHA384, SHA512} ANDed
 497  *         with OP_ALG_AAI_HMAC_PRECOMP.
 498  * @ivsize: initialization vector size
 499  * @icvsize: integrity check value (ICV) size (truncated or full)
 500  * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
 501  * @nonce: pointer to rfc3686 nonce
 502  * @ctx1_iv_off: IV offset in CONTEXT1 register
 503  * @is_qi: true when called from caam/qi
 504  * @era: SEC Era
 505  */
 506 void cnstr_shdsc_aead_givencap(u32 * const desc, struct alginfo *cdata,
 507                                struct alginfo *adata, unsigned int ivsize,
 508                                unsigned int icvsize, const bool is_rfc3686,
 509                                u32 *nonce, const u32 ctx1_iv_off,
 510                                const bool is_qi, int era)
 511 {
 512         u32 geniv, moveiv;
 513
 514         /* Note: Context registers are saved. */
 515         init_sh_desc_key_aead(desc, cdata, adata, is_rfc3686, nonce, era);
 516
 517         if (is_qi) {
 518                 u32 *wait_load_cmd;
 519
 520                 /* REG3 = assoclen */
 521                 append_seq_load(desc, 4, LDST_CLASS_DECO |
 522                                 LDST_SRCDST_WORD_DECO_MATH3 |
 523                                 (4 << LDST_OFFSET_SHIFT));
 524
 525                 wait_load_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
 526                                             JUMP_COND_CALM | JUMP_COND_NCP |
 527                                             JUMP_COND_NOP | JUMP_COND_NIP |
 528                                             JUMP_COND_NIFP);
 529                 set_jump_tgt_here(desc, wait_load_cmd);
 530         }
 531
 532         if (is_rfc3686) {
 533                 if (is_qi)
 534                         append_seq_load(desc, ivsize, LDST_CLASS_1_CCB |
 535                                         LDST_SRCDST_BYTE_CONTEXT |
 536                                         (ctx1_iv_off << LDST_OFFSET_SHIFT));
 537
 538                 goto copy_iv;
 539         }
 540
 541         /* Generate IV */
 542         geniv = NFIFOENTRY_STYPE_PAD | NFIFOENTRY_DEST_DECO |
 543                 NFIFOENTRY_DTYPE_MSG | NFIFOENTRY_LC1 |
 544                 NFIFOENTRY_PTYPE_RND | (ivsize << NFIFOENTRY_DLEN_SHIFT);
 545         append_load_imm_u32(desc, geniv, LDST_CLASS_IND_CCB |
 546                             LDST_SRCDST_WORD_INFO_FIFO | LDST_IMM);
 547         append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
 548         append_move(desc, MOVE_WAITCOMP |
 549                     MOVE_SRC_INFIFO | MOVE_DEST_CLASS1CTX |
 550                     (ctx1_iv_off << MOVE_OFFSET_SHIFT) |
 551                     (ivsize << MOVE_LEN_SHIFT));
 552         append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
 553
 554 copy_iv:
 555         /* Copy IV to class 1 context */
 556         append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_OUTFIFO |
 557                     (ctx1_iv_off << MOVE_OFFSET_SHIFT) |
 558                     (ivsize << MOVE_LEN_SHIFT));
 559
 560         /* Return to encryption */
 561         append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
 562                          OP_ALG_ENCRYPT);
 563
 564         /* Read and write assoclen bytes */
 565         if (is_qi || era < 3) {
 566                 append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
 567                 append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);
 568         } else {
 569                 append_math_add(desc, VARSEQINLEN, ZERO, DPOVRD, CAAM_CMD_SZ);
 570                 append_math_add(desc, VARSEQOUTLEN, ZERO, DPOVRD, CAAM_CMD_SZ);
 571         }
 572
 573         /* Skip assoc data */
 574         append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);
 575
 576         /* read assoc before reading payload */
 577         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG |
 578                              KEY_VLF);
 579
 580         /* Copy iv from outfifo to class 2 fifo */
 581         moveiv = NFIFOENTRY_STYPE_OFIFO | NFIFOENTRY_DEST_CLASS2 |
 582                  NFIFOENTRY_DTYPE_MSG | (ivsize << NFIFOENTRY_DLEN_SHIFT);
 583         append_load_imm_u32(desc, moveiv, LDST_CLASS_IND_CCB |
 584                             LDST_SRCDST_WORD_INFO_FIFO | LDST_IMM);
 585         append_load_imm_u32(desc, ivsize, LDST_CLASS_2_CCB |
 586                             LDST_SRCDST_WORD_DATASZ_REG | LDST_IMM);
 587
 588         /* Load Counter into CONTEXT1 reg */
 589         if (is_rfc3686)
 590                 append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
 591                                      LDST_SRCDST_BYTE_CONTEXT |
 592                                      ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
 593                                       LDST_OFFSET_SHIFT));
 594
 595         /* Class 1 operation */
 596         append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
 597                          OP_ALG_ENCRYPT);
 598
 599         /* Will write ivsize + cryptlen */
 600         append_math_add(desc, VARSEQOUTLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
 601
 602         /* Not need to reload iv */
 603         append_seq_fifo_load(desc, ivsize,
 604                              FIFOLD_CLASS_SKIP);
 605
 606         /* Will read cryptlen */
 607         append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
 608         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_BOTH | KEY_VLF |
 609                              FIFOLD_TYPE_MSG1OUT2 | FIFOLD_TYPE_LASTBOTH);
 610         append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | KEY_VLF);
 611
 612         /* Write ICV */
 613         append_seq_store(desc, icvsize, LDST_CLASS_2_CCB |
 614                          LDST_SRCDST_BYTE_CONTEXT);
 615
 616 #ifdef DEBUG
 617         print_hex_dump(KERN_ERR,
 618                        "aead givenc shdesc@" __stringify(__LINE__)": ",
 619                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
 620 #endif
 621 }
 622 EXPORT_SYMBOL(cnstr_shdsc_aead_givencap);
 623
 624 /**
 625  * cnstr_shdsc_gcm_encap - gcm encapsulation shared descriptor
 626  * @desc: pointer to buffer used for descriptor construction
 627  * @cdata: pointer to block cipher transform definitions
 628  *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
 629  * @ivsize: initialization vector size
 630  * @icvsize: integrity check value (ICV) size (truncated or full)
 631  * @is_qi: true when called from caam/qi
 632  */
 633 void cnstr_shdsc_gcm_encap(u32 * const desc, struct alginfo *cdata,
 634                            unsigned int ivsize, unsigned int icvsize,
 635                            const bool is_qi)
 636 {
 637         u32 *key_jump_cmd, *zero_payload_jump_cmd, *zero_assoc_jump_cmd1,
 638             *zero_assoc_jump_cmd2;
 639
 640         init_sh_desc(desc, HDR_SHARE_SERIAL);
 641
 642         /* skip key loading if they are loaded due to sharing */
 643         key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
 644                                    JUMP_COND_SHRD);
 645         if (cdata->key_inline)
 646                 append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
 647                                   cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
 648         else
 649                 append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
 650                            KEY_DEST_CLASS_REG);
 651         set_jump_tgt_here(desc, key_jump_cmd);
 652
 653         /* class 1 operation */
 654         append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
 655                          OP_ALG_ENCRYPT);
 656
 657         if (is_qi) {
 658                 u32 *wait_load_cmd;
 659
 660                 /* REG3 = assoclen */
 661                 append_seq_load(desc, 4, LDST_CLASS_DECO |
 662                                 LDST_SRCDST_WORD_DECO_MATH3 |
 663                                 (4 << LDST_OFFSET_SHIFT));
 664
 665                 wait_load_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
 666                                             JUMP_COND_CALM | JUMP_COND_NCP |
 667                                             JUMP_COND_NOP | JUMP_COND_NIP |
 668                                             JUMP_COND_NIFP);
 669                 set_jump_tgt_here(desc, wait_load_cmd);
 670
 671                 append_math_sub_imm_u32(desc, VARSEQOUTLEN, SEQINLEN, IMM,
 672                                         ivsize);
 673         } else {
 674                 append_math_sub(desc, VARSEQOUTLEN, SEQINLEN, REG0,
 675                                 CAAM_CMD_SZ);
 676         }
 677
 678         /* if assoclen + cryptlen is ZERO, skip to ICV write */
 679         zero_assoc_jump_cmd2 = append_jump(desc, JUMP_TEST_ALL |
 680                                                  JUMP_COND_MATH_Z);
 681
 682         if (is_qi)
 683                 append_seq_fifo_load(desc, ivsize, FIFOLD_CLASS_CLASS1 |
 684                                      FIFOLD_TYPE_IV | FIFOLD_TYPE_FLUSH1);
 685
 686         /* if assoclen is ZERO, skip reading the assoc data */
 687         append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
 688         zero_assoc_jump_cmd1 = append_jump(desc, JUMP_TEST_ALL |
 689                                            JUMP_COND_MATH_Z);
 690
 691         append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);
 692
 693         /* skip assoc data */
 694         append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);
 695
 696         /* cryptlen = seqinlen - assoclen */
 697         append_math_sub(desc, VARSEQOUTLEN, SEQINLEN, REG3, CAAM_CMD_SZ);
 698
 699         /* if cryptlen is ZERO jump to zero-payload commands */
 700         zero_payload_jump_cmd = append_jump(desc, JUMP_TEST_ALL |
 701                                             JUMP_COND_MATH_Z);
 702
 703         /* read assoc data */
 704         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
 705                              FIFOLD_TYPE_AAD | FIFOLD_TYPE_FLUSH1);
 706         set_jump_tgt_here(desc, zero_assoc_jump_cmd1);
 707
 708         append_math_sub(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
 709
 710         /* write encrypted data */
 711         append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF);
 712
 713         /* read payload data */
 714         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
 715                              FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST1);
 716
 717         /* jump to ICV writing */
 718         if (is_qi)
 719                 append_jump(desc, JUMP_TEST_ALL | 4);
 720         else
 721                 append_jump(desc, JUMP_TEST_ALL | 2);
 722
 723         /* zero-payload commands */
 724         set_jump_tgt_here(desc, zero_payload_jump_cmd);
 725
 726         /* read assoc data */
 727         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
 728                              FIFOLD_TYPE_AAD | FIFOLD_TYPE_LAST1);
 729         if (is_qi)
 730                 /* jump to ICV writing */
 731                 append_jump(desc, JUMP_TEST_ALL | 2);
 732
 733         /* There is no input data */
 734         set_jump_tgt_here(desc, zero_assoc_jump_cmd2);
 735
 736         if (is_qi)
 737                 append_seq_fifo_load(desc, ivsize, FIFOLD_CLASS_CLASS1 |
 738                                      FIFOLD_TYPE_IV | FIFOLD_TYPE_FLUSH1 |
 739                                      FIFOLD_TYPE_LAST1);
 740
 741         /* write ICV */
 742         append_seq_store(desc, icvsize, LDST_CLASS_1_CCB |
 743                          LDST_SRCDST_BYTE_CONTEXT);
 744
 745 #ifdef DEBUG
 746         print_hex_dump(KERN_ERR, "gcm enc shdesc@" __stringify(__LINE__)": ",
 747                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
 748 #endif
 749 }
 750 EXPORT_SYMBOL(cnstr_shdsc_gcm_encap);
 751
 752 /**
 753  * cnstr_shdsc_gcm_decap - gcm decapsulation shared descriptor
 754  * @desc: pointer to buffer used for descriptor construction
 755  * @cdata: pointer to block cipher transform definitions
 756  *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
 757  * @ivsize: initialization vector size
 758  * @icvsize: integrity check value (ICV) size (truncated or full)
 759  * @is_qi: true when called from caam/qi
 760  */
 761 void cnstr_shdsc_gcm_decap(u32 * const desc, struct alginfo *cdata,
 762                            unsigned int ivsize, unsigned int icvsize,
 763                            const bool is_qi)
 764 {
 765         u32 *key_jump_cmd, *zero_payload_jump_cmd, *zero_assoc_jump_cmd1;
 766
 767         init_sh_desc(desc, HDR_SHARE_SERIAL);
 768
 769         /* skip key loading if they are loaded due to sharing */
 770         key_jump_cmd = append_jump(desc, JUMP_JSL |
 771                                    JUMP_TEST_ALL | JUMP_COND_SHRD);
 772         if (cdata->key_inline)
 773                 append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
 774                                   cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
 775         else
 776                 append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
 777                            KEY_DEST_CLASS_REG);
 778         set_jump_tgt_here(desc, key_jump_cmd);
 779
 780         /* class 1 operation */
 781         append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
 782                          OP_ALG_DECRYPT | OP_ALG_ICV_ON);
 783
 784         if (is_qi) {
 785                 u32 *wait_load_cmd;
 786
 787                 /* REG3 = assoclen */
 788                 append_seq_load(desc, 4, LDST_CLASS_DECO |
 789                                 LDST_SRCDST_WORD_DECO_MATH3 |
 790                                 (4 << LDST_OFFSET_SHIFT));
 791
 792                 wait_load_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
 793                                             JUMP_COND_CALM | JUMP_COND_NCP |
 794                                             JUMP_COND_NOP | JUMP_COND_NIP |
 795                                             JUMP_COND_NIFP);
 796                 set_jump_tgt_here(desc, wait_load_cmd);
 797
 798                 append_seq_fifo_load(desc, ivsize, FIFOLD_CLASS_CLASS1 |
 799                                      FIFOLD_TYPE_IV | FIFOLD_TYPE_FLUSH1);
 800         }
 801
 802         /* if assoclen is ZERO, skip reading the assoc data */
 803         append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
 804         zero_assoc_jump_cmd1 = append_jump(desc, JUMP_TEST_ALL |
 805                                                  JUMP_COND_MATH_Z);
 806
 807         append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);
 808
 809         /* skip assoc data */
 810         append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);
 811
 812         /* read assoc data */
 813         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
 814                              FIFOLD_TYPE_AAD | FIFOLD_TYPE_FLUSH1);
 815
 816         set_jump_tgt_here(desc, zero_assoc_jump_cmd1);
 817
 818         /* cryptlen = seqoutlen - assoclen */
 819         append_math_sub(desc, VARSEQINLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
 820
 821         /* jump to zero-payload command if cryptlen is zero */
 822         zero_payload_jump_cmd = append_jump(desc, JUMP_TEST_ALL |
 823                                             JUMP_COND_MATH_Z);
 824
 825         append_math_sub(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
 826
 827         /* store encrypted data */
 828         append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF);
 829
 830         /* read payload data */
 831         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
 832                              FIFOLD_TYPE_MSG | FIFOLD_TYPE_FLUSH1);
 833
 834         /* zero-payload command */
 835         set_jump_tgt_here(desc, zero_payload_jump_cmd);
 836
 837         /* read ICV */
 838         append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS1 |
 839                              FIFOLD_TYPE_ICV | FIFOLD_TYPE_LAST1);
 840
 841 #ifdef DEBUG
 842         print_hex_dump(KERN_ERR, "gcm dec shdesc@" __stringify(__LINE__)": ",
 843                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
 844 #endif
 845 }
 846 EXPORT_SYMBOL(cnstr_shdsc_gcm_decap);
 847
 848 /**
 849  * cnstr_shdsc_rfc4106_encap - IPSec ESP gcm encapsulation shared descriptor
 850  *                             (non-protocol).
 851  * @desc: pointer to buffer used for descriptor construction
 852  * @cdata: pointer to block cipher transform definitions
 853  *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
 854  * @ivsize: initialization vector size
 855  * @icvsize: integrity check value (ICV) size (truncated or full)
 856  * @is_qi: true when called from caam/qi
 857  */
 858 void cnstr_shdsc_rfc4106_encap(u32 * const desc, struct alginfo *cdata,
 859                                unsigned int ivsize, unsigned int icvsize,
 860                                const bool is_qi)
 861 {
 862         u32 *key_jump_cmd;
 863
 864         init_sh_desc(desc, HDR_SHARE_SERIAL);
 865
 866         /* Skip key loading if it is loaded due to sharing */
 867         key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
 868                                    JUMP_COND_SHRD);
 869         if (cdata->key_inline)
 870                 append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
 871                                   cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
 872         else
 873                 append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
 874                            KEY_DEST_CLASS_REG);
 875         set_jump_tgt_here(desc, key_jump_cmd);
 876
 877         /* Class 1 operation */
 878         append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
 879                          OP_ALG_ENCRYPT);
 880
 881         if (is_qi) {
 882                 u32 *wait_load_cmd;
 883
 884                 /* REG3 = assoclen */
 885                 append_seq_load(desc, 4, LDST_CLASS_DECO |
 886                                 LDST_SRCDST_WORD_DECO_MATH3 |
 887                                 (4 << LDST_OFFSET_SHIFT));
 888
 889                 wait_load_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
 890                                             JUMP_COND_CALM | JUMP_COND_NCP |
 891                                             JUMP_COND_NOP | JUMP_COND_NIP |
 892                                             JUMP_COND_NIFP);
 893                 set_jump_tgt_here(desc, wait_load_cmd);
 894
 895                 /* Read salt and IV */
 896                 append_fifo_load_as_imm(desc, (void *)(cdata->key_virt +
 897                                         cdata->keylen), 4, FIFOLD_CLASS_CLASS1 |
 898                                         FIFOLD_TYPE_IV);
 899                 append_seq_fifo_load(desc, ivsize, FIFOLD_CLASS_CLASS1 |
 900                                      FIFOLD_TYPE_IV | FIFOLD_TYPE_FLUSH1);
 901         }
 902
 903         append_math_sub_imm_u32(desc, VARSEQINLEN, REG3, IMM, ivsize);
 904         append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);
 905
 906         /* Read assoc data */
 907         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
 908                              FIFOLD_TYPE_AAD | FIFOLD_TYPE_FLUSH1);
 909
 910         /* Skip IV */
 911         append_seq_fifo_load(desc, ivsize, FIFOLD_CLASS_SKIP);
 912
 913         /* Will read cryptlen bytes */
 914         append_math_sub(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
 915
 916         /* Workaround for erratum A-005473 (simultaneous SEQ FIFO skips) */
 917         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLD_TYPE_MSG);
 918
 919         /* Skip assoc data */
 920         append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);
 921
 922         /* cryptlen = seqoutlen - assoclen */
 923         append_math_sub(desc, VARSEQOUTLEN, VARSEQINLEN, REG0, CAAM_CMD_SZ);
 924
 925         /* Write encrypted data */
 926         append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF);
 927
 928         /* Read payload data */
 929         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
 930                              FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST1);
 931
 932         /* Write ICV */
 933         append_seq_store(desc, icvsize, LDST_CLASS_1_CCB |
 934                          LDST_SRCDST_BYTE_CONTEXT);
 935
 936 #ifdef DEBUG
 937         print_hex_dump(KERN_ERR,
 938                        "rfc4106 enc shdesc@" __stringify(__LINE__)": ",
 939                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
 940 #endif
 941 }
 942 EXPORT_SYMBOL(cnstr_shdsc_rfc4106_encap);
 943
 944 /**
 945  * cnstr_shdsc_rfc4106_decap - IPSec ESP gcm decapsulation shared descriptor
 946  *                             (non-protocol).
 947  * @desc: pointer to buffer used for descriptor construction
 948  * @cdata: pointer to block cipher transform definitions
 949  *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
 950  * @ivsize: initialization vector size
 951  * @icvsize: integrity check value (ICV) size (truncated or full)
 952  * @is_qi: true when called from caam/qi
 953  */
 954 void cnstr_shdsc_rfc4106_decap(u32 * const desc, struct alginfo *cdata,
 955                                unsigned int ivsize, unsigned int icvsize,
 956                                const bool is_qi)
 957 {
 958         u32 *key_jump_cmd;
 959
 960         init_sh_desc(desc, HDR_SHARE_SERIAL);
 961
 962         /* Skip key loading if it is loaded due to sharing */
 963         key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
 964                                    JUMP_COND_SHRD);
 965         if (cdata->key_inline)
 966                 append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
 967                                   cdata->keylen, CLASS_1 |
 968                                   KEY_DEST_CLASS_REG);
 969         else
 970                 append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
 971                            KEY_DEST_CLASS_REG);
 972         set_jump_tgt_here(desc, key_jump_cmd);
 973
 974         /* Class 1 operation */
 975         append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
 976                          OP_ALG_DECRYPT | OP_ALG_ICV_ON);
 977
 978         if (is_qi) {
 979                 u32 *wait_load_cmd;
 980
 981                 /* REG3 = assoclen */
 982                 append_seq_load(desc, 4, LDST_CLASS_DECO |
 983                                 LDST_SRCDST_WORD_DECO_MATH3 |
 984                                 (4 << LDST_OFFSET_SHIFT));
 985
 986                 wait_load_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
 987                                             JUMP_COND_CALM | JUMP_COND_NCP |
 988                                             JUMP_COND_NOP | JUMP_COND_NIP |
 989                                             JUMP_COND_NIFP);
 990                 set_jump_tgt_here(desc, wait_load_cmd);
 991
 992                 /* Read salt and IV */
 993                 append_fifo_load_as_imm(desc, (void *)(cdata->key_virt +
 994                                         cdata->keylen), 4, FIFOLD_CLASS_CLASS1 |
 995                                         FIFOLD_TYPE_IV);
 996                 append_seq_fifo_load(desc, ivsize, FIFOLD_CLASS_CLASS1 |
 997                                      FIFOLD_TYPE_IV | FIFOLD_TYPE_FLUSH1);
 998         }
 999
1000         append_math_sub_imm_u32(desc, VARSEQINLEN, REG3, IMM, ivsize);
1001         append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);
1002
1003         /* Read assoc data */
1004         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
1005                              FIFOLD_TYPE_AAD | FIFOLD_TYPE_FLUSH1);
1006
1007         /* Skip IV */
1008         append_seq_fifo_load(desc, ivsize, FIFOLD_CLASS_SKIP);
1009
1010         /* Will read cryptlen bytes */
1011         append_math_sub(desc, VARSEQINLEN, SEQOUTLEN, REG3, CAAM_CMD_SZ);
1012
1013         /* Workaround for erratum A-005473 (simultaneous SEQ FIFO skips) */
1014         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLD_TYPE_MSG);
1015
1016         /* Skip assoc data */
1017         append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);
1018
1019         /* Will write cryptlen bytes */
1020         append_math_sub(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
1021
1022         /* Store payload data */
1023         append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF);
1024
1025         /* Read encrypted data */
1026         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 | FIFOLDST_VLF |
1027                              FIFOLD_TYPE_MSG | FIFOLD_TYPE_FLUSH1);
1028
1029         /* Read ICV */
1030         append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS1 |
1031                              FIFOLD_TYPE_ICV | FIFOLD_TYPE_LAST1);
1032
1033 #ifdef DEBUG
1034         print_hex_dump(KERN_ERR,
1035                        "rfc4106 dec shdesc@" __stringify(__LINE__)": ",
1036                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
1037 #endif
1038 }
1039 EXPORT_SYMBOL(cnstr_shdsc_rfc4106_decap);
1040
1041 /**
1042  * cnstr_shdsc_rfc4543_encap - IPSec ESP gmac encapsulation shared descriptor
1043  *                             (non-protocol).
1044  * @desc: pointer to buffer used for descriptor construction
1045  * @cdata: pointer to block cipher transform definitions
1046  *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
1047  * @ivsize: initialization vector size
1048  * @icvsize: integrity check value (ICV) size (truncated or full)
1049  * @is_qi: true when called from caam/qi
1050  */
1051 void cnstr_shdsc_rfc4543_encap(u32 * const desc, struct alginfo *cdata,
1052                                unsigned int ivsize, unsigned int icvsize,
1053                                const bool is_qi)
1054 {
1055         u32 *key_jump_cmd, *read_move_cmd, *write_move_cmd;
1056
1057         init_sh_desc(desc, HDR_SHARE_SERIAL);
1058
1059         /* Skip key loading if it is loaded due to sharing */
1060         key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
1061                                    JUMP_COND_SHRD);
1062         if (cdata->key_inline)
1063                 append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
1064                                   cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
1065         else
1066                 append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
1067                            KEY_DEST_CLASS_REG);
1068         set_jump_tgt_here(desc, key_jump_cmd);
1069
1070         /* Class 1 operation */
1071         append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
1072                          OP_ALG_ENCRYPT);
1073
1074         if (is_qi) {
1075                 /* assoclen is not needed, skip it */
1076                 append_seq_fifo_load(desc, 4, FIFOLD_CLASS_SKIP);
1077
1078                 /* Read salt and IV */
1079                 append_fifo_load_as_imm(desc, (void *)(cdata->key_virt +
1080                                         cdata->keylen), 4, FIFOLD_CLASS_CLASS1 |
1081                                         FIFOLD_TYPE_IV);
1082                 append_seq_fifo_load(desc, ivsize, FIFOLD_CLASS_CLASS1 |
1083                                      FIFOLD_TYPE_IV | FIFOLD_TYPE_FLUSH1);
1084         }
1085
1086         /* assoclen + cryptlen = seqinlen */
1087         append_math_sub(desc, REG3, SEQINLEN, REG0, CAAM_CMD_SZ);
1088
1089         /*
1090          * MOVE_LEN opcode is not available in all SEC HW revisions,
1091          * thus need to do some magic, i.e. self-patch the descriptor
1092          * buffer.
1093          */
1094         read_move_cmd = append_move(desc, MOVE_SRC_DESCBUF | MOVE_DEST_MATH3 |
1095                                     (0x6 << MOVE_LEN_SHIFT));
1096         write_move_cmd = append_move(desc, MOVE_SRC_MATH3 | MOVE_DEST_DESCBUF |
1097                                      (0x8 << MOVE_LEN_SHIFT) | MOVE_WAITCOMP);
1098
1099         /* Will read assoclen + cryptlen bytes */
1100         append_math_sub(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
1101
1102         /* Will write assoclen + cryptlen bytes */
1103         append_math_sub(desc, VARSEQOUTLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
1104
1105         /* Read and write assoclen + cryptlen bytes */
1106         aead_append_src_dst(desc, FIFOLD_TYPE_AAD);
1107
1108         set_move_tgt_here(desc, read_move_cmd);
1109         set_move_tgt_here(desc, write_move_cmd);
1110         append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
1111         /* Move payload data to OFIFO */
1112         append_move(desc, MOVE_SRC_INFIFO_CL | MOVE_DEST_OUTFIFO);
1113
1114         /* Write ICV */
1115         append_seq_store(desc, icvsize, LDST_CLASS_1_CCB |
1116                          LDST_SRCDST_BYTE_CONTEXT);
1117
1118 #ifdef DEBUG
1119         print_hex_dump(KERN_ERR,
1120                        "rfc4543 enc shdesc@" __stringify(__LINE__)": ",
1121                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
1122 #endif
1123 }
1124 EXPORT_SYMBOL(cnstr_shdsc_rfc4543_encap);
1125
1126 /**
1127  * cnstr_shdsc_rfc4543_decap - IPSec ESP gmac decapsulation shared descriptor
1128  *                             (non-protocol).
1129  * @desc: pointer to buffer used for descriptor construction
1130  * @cdata: pointer to block cipher transform definitions
1131  *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
1132  * @ivsize: initialization vector size
1133  * @icvsize: integrity check value (ICV) size (truncated or full)
1134  * @is_qi: true when called from caam/qi
1135  */
1136 void cnstr_shdsc_rfc4543_decap(u32 * const desc, struct alginfo *cdata,
1137                                unsigned int ivsize, unsigned int icvsize,
1138                                const bool is_qi)
1139 {
1140         u32 *key_jump_cmd, *read_move_cmd, *write_move_cmd;
1141
1142         init_sh_desc(desc, HDR_SHARE_SERIAL);
1143
1144         /* Skip key loading if it is loaded due to sharing */
1145         key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
1146                                    JUMP_COND_SHRD);
1147         if (cdata->key_inline)
1148                 append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
1149                                   cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
1150         else
1151                 append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
1152                            KEY_DEST_CLASS_REG);
1153         set_jump_tgt_here(desc, key_jump_cmd);
1154
1155         /* Class 1 operation */
1156         append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
1157                          OP_ALG_DECRYPT | OP_ALG_ICV_ON);
1158
1159         if (is_qi) {
1160                 /* assoclen is not needed, skip it */
1161                 append_seq_fifo_load(desc, 4, FIFOLD_CLASS_SKIP);
1162
1163                 /* Read salt and IV */
1164                 append_fifo_load_as_imm(desc, (void *)(cdata->key_virt +
1165                                         cdata->keylen), 4, FIFOLD_CLASS_CLASS1 |
1166                                         FIFOLD_TYPE_IV);
1167                 append_seq_fifo_load(desc, ivsize, FIFOLD_CLASS_CLASS1 |
1168                                      FIFOLD_TYPE_IV | FIFOLD_TYPE_FLUSH1);
1169         }
1170
1171         /* assoclen + cryptlen = seqoutlen */
1172         append_math_sub(desc, REG3, SEQOUTLEN, REG0, CAAM_CMD_SZ);
1173
1174         /*
1175          * MOVE_LEN opcode is not available in all SEC HW revisions,
1176          * thus need to do some magic, i.e. self-patch the descriptor
1177          * buffer.
1178          */
1179         read_move_cmd = append_move(desc, MOVE_SRC_DESCBUF | MOVE_DEST_MATH3 |
1180                                     (0x6 << MOVE_LEN_SHIFT));
1181         write_move_cmd = append_move(desc, MOVE_SRC_MATH3 | MOVE_DEST_DESCBUF |
1182                                      (0x8 << MOVE_LEN_SHIFT) | MOVE_WAITCOMP);
1183
1184         /* Will read assoclen + cryptlen bytes */
1185         append_math_sub(desc, VARSEQINLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
1186
1187         /* Will write assoclen + cryptlen bytes */
1188         append_math_sub(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
1189
1190         /* Store payload data */
1191         append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF);
1192
1193         /* In-snoop assoclen + cryptlen data */
1194         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_BOTH | FIFOLDST_VLF |
1195                              FIFOLD_TYPE_AAD | FIFOLD_TYPE_LAST2FLUSH1);
1196
1197         set_move_tgt_here(desc, read_move_cmd);
1198         set_move_tgt_here(desc, write_move_cmd);
1199         append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
1200         /* Move payload data to OFIFO */
1201         append_move(desc, MOVE_SRC_INFIFO_CL | MOVE_DEST_OUTFIFO);
1202         append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
1203
1204         /* Read ICV */
1205         append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS1 |
1206                              FIFOLD_TYPE_ICV | FIFOLD_TYPE_LAST1);
1207
1208 #ifdef DEBUG
1209         print_hex_dump(KERN_ERR,
1210                        "rfc4543 dec shdesc@" __stringify(__LINE__)": ",
1211                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
1212 #endif
1213 }
1214 EXPORT_SYMBOL(cnstr_shdsc_rfc4543_decap);
1215
1216 /* For skcipher encrypt and decrypt, read from req->src and write to req->dst */
1217 static inline void skcipher_append_src_dst(u32 *desc)
1218 {
1219         append_math_add(desc, VARSEQOUTLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
1220         append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
1221         append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 |
1222                              KEY_VLF | FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST1);
1223         append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | KEY_VLF);
1224 }
1225
1226 /**
1227  * cnstr_shdsc_skcipher_encap - skcipher encapsulation shared descriptor
1228  * @desc: pointer to buffer used for descriptor construction
1229  * @cdata: pointer to block cipher transform definitions
1230  *         Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
1231  *         with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
1232  * @ivsize: initialization vector size
1233  * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
1234  * @ctx1_iv_off: IV offset in CONTEXT1 register
1235  */
1236 void cnstr_shdsc_skcipher_encap(u32 * const desc, struct alginfo *cdata,
1237                                 unsigned int ivsize, const bool is_rfc3686,
1238                                 const u32 ctx1_iv_off)
1239 {
1240         u32 *key_jump_cmd;
1241
1242         init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
1243         /* Skip if already shared */
1244         key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
1245                                    JUMP_COND_SHRD);
1246
1247         /* Load class1 key only */
1248         append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
1249                           cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
1250
1251         /* Load nonce into CONTEXT1 reg */
1252         if (is_rfc3686) {
1253                 const u8 *nonce = cdata->key_virt + cdata->keylen;
1254
1255                 append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE,
1256                                    LDST_CLASS_IND_CCB |
1257                                    LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM);
1258                 append_move(desc, MOVE_WAITCOMP | MOVE_SRC_OUTFIFO |
1259                             MOVE_DEST_CLASS1CTX | (16 << MOVE_OFFSET_SHIFT) |
1260                             (CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT));
1261         }
1262
1263         set_jump_tgt_here(desc, key_jump_cmd);
1264
1265         /* Load iv */
1266         append_seq_load(desc, ivsize, LDST_SRCDST_BYTE_CONTEXT |
1267                         LDST_CLASS_1_CCB | (ctx1_iv_off << LDST_OFFSET_SHIFT));
1268
1269         /* Load counter into CONTEXT1 reg */
1270         if (is_rfc3686)
1271                 append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
1272                                      LDST_SRCDST_BYTE_CONTEXT |
1273                                      ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
1274                                       LDST_OFFSET_SHIFT));
1275
1276         /* Load operation */
1277         append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
1278                          OP_ALG_ENCRYPT);
1279
1280         /* Perform operation */
1281         skcipher_append_src_dst(desc);
1282
1283 #ifdef DEBUG
1284         print_hex_dump(KERN_ERR,
1285                        "skcipher enc shdesc@" __stringify(__LINE__)": ",
1286                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
1287 #endif
1288 }
1289 EXPORT_SYMBOL(cnstr_shdsc_skcipher_encap);
1290
1291 /**
1292  * cnstr_shdsc_skcipher_decap - skcipher decapsulation shared descriptor
1293  * @desc: pointer to buffer used for descriptor construction
1294  * @cdata: pointer to block cipher transform definitions
1295  *         Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
1296  *         with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
1297  * @ivsize: initialization vector size
1298  * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
1299  * @ctx1_iv_off: IV offset in CONTEXT1 register
1300  */
1301 void cnstr_shdsc_skcipher_decap(u32 * const desc, struct alginfo *cdata,
1302                                 unsigned int ivsize, const bool is_rfc3686,
1303                                 const u32 ctx1_iv_off)
1304 {
1305         u32 *key_jump_cmd;
1306
1307         init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
1308         /* Skip if already shared */
1309         key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
1310                                    JUMP_COND_SHRD);
1311
1312         /* Load class1 key only */
1313         append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
1314                           cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
1315
1316         /* Load nonce into CONTEXT1 reg */
1317         if (is_rfc3686) {
1318                 const u8 *nonce = cdata->key_virt + cdata->keylen;
1319
1320                 append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE,
1321                                    LDST_CLASS_IND_CCB |
1322                                    LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM);
1323                 append_move(desc, MOVE_WAITCOMP | MOVE_SRC_OUTFIFO |
1324                             MOVE_DEST_CLASS1CTX | (16 << MOVE_OFFSET_SHIFT) |
1325                             (CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT));
1326         }
1327
1328         set_jump_tgt_here(desc, key_jump_cmd);
1329
1330         /* load IV */
1331         append_seq_load(desc, ivsize, LDST_SRCDST_BYTE_CONTEXT |
1332                         LDST_CLASS_1_CCB | (ctx1_iv_off << LDST_OFFSET_SHIFT));
1333
1334         /* Load counter into CONTEXT1 reg */
1335         if (is_rfc3686)
1336                 append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
1337                                      LDST_SRCDST_BYTE_CONTEXT |
1338                                      ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
1339                                       LDST_OFFSET_SHIFT));
1340
1341         /* Choose operation */
1342         if (ctx1_iv_off)
1343                 append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
1344                                  OP_ALG_DECRYPT);
1345         else
1346                 append_dec_op1(desc, cdata->algtype);
1347
1348         /* Perform operation */
1349         skcipher_append_src_dst(desc);
1350
1351 #ifdef DEBUG
1352         print_hex_dump(KERN_ERR,
1353                        "skcipher dec shdesc@" __stringify(__LINE__)": ",
1354                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
1355 #endif
1356 }
1357 EXPORT_SYMBOL(cnstr_shdsc_skcipher_decap);
1358
1359 /**
1360  * cnstr_shdsc_xts_skcipher_encap - xts skcipher encapsulation shared descriptor
1361  * @desc: pointer to buffer used for descriptor construction
1362  * @cdata: pointer to block cipher transform definitions
1363  *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_XTS.
1364  */
1365 void cnstr_shdsc_xts_skcipher_encap(u32 * const desc, struct alginfo *cdata)
1366 {
1367         __be64 sector_size = cpu_to_be64(512);
1368         u32 *key_jump_cmd;
1369
1370         init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
1371         /* Skip if already shared */
1372         key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
1373                                    JUMP_COND_SHRD);
1374
1375         /* Load class1 keys only */
1376         append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
1377                           cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
1378
1379         /* Load sector size with index 40 bytes (0x28) */
1380         append_load_as_imm(desc, (void *)&sector_size, 8, LDST_CLASS_1_CCB |
1381                            LDST_SRCDST_BYTE_CONTEXT |
1382                            (0x28 << LDST_OFFSET_SHIFT));
1383
1384         set_jump_tgt_here(desc, key_jump_cmd);
1385
1386         /*
1387          * create sequence for loading the sector index
1388          * Upper 8B of IV - will be used as sector index
1389          * Lower 8B of IV - will be discarded
1390          */
1391         append_seq_load(desc, 8, LDST_SRCDST_BYTE_CONTEXT | LDST_CLASS_1_CCB |
1392                         (0x20 << LDST_OFFSET_SHIFT));
1393         append_seq_fifo_load(desc, 8, FIFOLD_CLASS_SKIP);
1394
1395         /* Load operation */
1396         append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
1397                          OP_ALG_ENCRYPT);
1398
1399         /* Perform operation */
1400         skcipher_append_src_dst(desc);
1401
1402 #ifdef DEBUG
1403         print_hex_dump(KERN_ERR,
1404                        "xts skcipher enc shdesc@" __stringify(__LINE__) ": ",
1405                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
1406 #endif
1407 }
1408 EXPORT_SYMBOL(cnstr_shdsc_xts_skcipher_encap);
1409
1410 /**
1411  * cnstr_shdsc_xts_skcipher_decap - xts skcipher decapsulation shared descriptor
1412  * @desc: pointer to buffer used for descriptor construction
1413  * @cdata: pointer to block cipher transform definitions
1414  *         Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_XTS.
1415  */
1416 void cnstr_shdsc_xts_skcipher_decap(u32 * const desc, struct alginfo *cdata)
1417 {
1418         __be64 sector_size = cpu_to_be64(512);
1419         u32 *key_jump_cmd;
1420
1421         init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
1422         /* Skip if already shared */
1423         key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
1424                                    JUMP_COND_SHRD);
1425
1426         /* Load class1 key only */
1427         append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
1428                           cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
1429
1430         /* Load sector size with index 40 bytes (0x28) */
1431         append_load_as_imm(desc, (void *)&sector_size, 8, LDST_CLASS_1_CCB |
1432                            LDST_SRCDST_BYTE_CONTEXT |
1433                            (0x28 << LDST_OFFSET_SHIFT));
1434
1435         set_jump_tgt_here(desc, key_jump_cmd);
1436
1437         /*
1438          * create sequence for loading the sector index
1439          * Upper 8B of IV - will be used as sector index
1440          * Lower 8B of IV - will be discarded
1441          */
1442         append_seq_load(desc, 8, LDST_SRCDST_BYTE_CONTEXT | LDST_CLASS_1_CCB |
1443                         (0x20 << LDST_OFFSET_SHIFT));
1444         append_seq_fifo_load(desc, 8, FIFOLD_CLASS_SKIP);
1445
1446         /* Load operation */
1447         append_dec_op1(desc, cdata->algtype);
1448
1449         /* Perform operation */
1450         skcipher_append_src_dst(desc);
1451
1452 #ifdef DEBUG
1453         print_hex_dump(KERN_ERR,
1454                        "xts skcipher dec shdesc@" __stringify(__LINE__) ": ",
1455                        DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
1456 #endif
1457 }
1458 EXPORT_SYMBOL(cnstr_shdsc_xts_skcipher_decap);
1459
1460 MODULE_LICENSE("GPL");
1461 MODULE_DESCRIPTION("FSL CAAM descriptor support");
1462 MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");