1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * caam descriptor construction helper functions 4 * 5 * Copyright 2008-2012 Freescale Semiconductor, Inc. 6 * Copyright 2019 NXP 7 */ 8 9 #ifndef DESC_CONSTR_H 10 #define DESC_CONSTR_H 11 12 #include "desc.h" 13 #include "regs.h" 14 15 #define IMMEDIATE (1 << 23) 16 #define CAAM_CMD_SZ sizeof(u32) 17 #define CAAM_PTR_SZ sizeof(dma_addr_t) 18 #define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * MAX_CAAM_DESCSIZE) 19 #define DESC_JOB_IO_LEN (CAAM_CMD_SZ * 5 + CAAM_PTR_SZ * 3) 20 21 #ifdef DEBUG 22 #define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\ 23 &__func__[sizeof("append")]); } while (0) 24 #else 25 #define PRINT_POS 26 #endif 27 28 #define SET_OK_NO_PROP_ERRORS (IMMEDIATE | LDST_CLASS_DECO | \ 29 LDST_SRCDST_WORD_DECOCTRL | \ 30 (LDOFF_CHG_SHARE_OK_NO_PROP << \ 31 LDST_OFFSET_SHIFT)) 32 #define DISABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \ 33 LDST_SRCDST_WORD_DECOCTRL | \ 34 (LDOFF_DISABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT)) 35 #define ENABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \ 36 LDST_SRCDST_WORD_DECOCTRL | \ 37 (LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT)) 38 39 extern bool caam_little_end; 40 41 /* 42 * HW fetches 4 S/G table entries at a time, irrespective of how many entries 43 * are in the table. It's SW's responsibility to make sure these accesses 44 * do not have side effects. 45 */ 46 static inline int pad_sg_nents(int sg_nents) 47 { 48 return ALIGN(sg_nents, 4); 49 } 50 51 static inline int desc_len(u32 * const desc) 52 { 53 return caam32_to_cpu(*desc) & HDR_DESCLEN_MASK; 54 } 55 56 static inline int desc_bytes(void * const desc) 57 { 58 return desc_len(desc) * CAAM_CMD_SZ; 59 } 60 61 static inline u32 *desc_end(u32 * const desc) 62 { 63 return desc + desc_len(desc); 64 } 65 66 static inline void *sh_desc_pdb(u32 * const desc) 67 { 68 return desc + 1; 69 } 70 71 static inline void init_desc(u32 * const desc, u32 options) 72 { 73 *desc = cpu_to_caam32((options | HDR_ONE) + 1); 74 } 75 76 static inline void init_sh_desc(u32 * const desc, u32 options) 77 { 78 PRINT_POS; 79 init_desc(desc, CMD_SHARED_DESC_HDR | options); 80 } 81 82 static inline void init_sh_desc_pdb(u32 * const desc, u32 options, 83 size_t pdb_bytes) 84 { 85 u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ; 86 87 init_sh_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT) + pdb_len) | 88 options); 89 } 90 91 static inline void init_job_desc(u32 * const desc, u32 options) 92 { 93 init_desc(desc, CMD_DESC_HDR | options); 94 } 95 96 static inline void init_job_desc_pdb(u32 * const desc, u32 options, 97 size_t pdb_bytes) 98 { 99 u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ; 100 101 init_job_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT)) | options); 102 } 103 104 static inline void append_ptr(u32 * const desc, dma_addr_t ptr) 105 { 106 dma_addr_t *offset = (dma_addr_t *)desc_end(desc); 107 108 *offset = cpu_to_caam_dma(ptr); 109 110 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 111 CAAM_PTR_SZ / CAAM_CMD_SZ); 112 } 113 114 static inline void init_job_desc_shared(u32 * const desc, dma_addr_t ptr, 115 int len, u32 options) 116 { 117 PRINT_POS; 118 init_job_desc(desc, HDR_SHARED | options | 119 (len << HDR_START_IDX_SHIFT)); 120 append_ptr(desc, ptr); 121 } 122 123 static inline void append_data(u32 * const desc, const void *data, int len) 124 { 125 u32 *offset = desc_end(desc); 126 127 if (len) /* avoid sparse warning: memcpy with byte count of 0 */ 128 memcpy(offset, data, len); 129 130 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 131 (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ); 132 } 133 134 static inline void append_cmd(u32 * const desc, u32 command) 135 { 136 u32 *cmd = desc_end(desc); 137 138 *cmd = cpu_to_caam32(command); 139 140 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 1); 141 } 142 143 #define append_u32 append_cmd 144 145 static inline void append_u64(u32 * const desc, u64 data) 146 { 147 u32 *offset = desc_end(desc); 148 149 /* Only 32-bit alignment is guaranteed in descriptor buffer */ 150 if (caam_little_end) { 151 *offset = cpu_to_caam32(lower_32_bits(data)); 152 *(++offset) = cpu_to_caam32(upper_32_bits(data)); 153 } else { 154 *offset = cpu_to_caam32(upper_32_bits(data)); 155 *(++offset) = cpu_to_caam32(lower_32_bits(data)); 156 } 157 158 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 2); 159 } 160 161 /* Write command without affecting header, and return pointer to next word */ 162 static inline u32 *write_cmd(u32 * const desc, u32 command) 163 { 164 *desc = cpu_to_caam32(command); 165 166 return desc + 1; 167 } 168 169 static inline void append_cmd_ptr(u32 * const desc, dma_addr_t ptr, int len, 170 u32 command) 171 { 172 append_cmd(desc, command | len); 173 append_ptr(desc, ptr); 174 } 175 176 /* Write length after pointer, rather than inside command */ 177 static inline void append_cmd_ptr_extlen(u32 * const desc, dma_addr_t ptr, 178 unsigned int len, u32 command) 179 { 180 append_cmd(desc, command); 181 if (!(command & (SQIN_RTO | SQIN_PRE))) 182 append_ptr(desc, ptr); 183 append_cmd(desc, len); 184 } 185 186 static inline void append_cmd_data(u32 * const desc, const void *data, int len, 187 u32 command) 188 { 189 append_cmd(desc, command | IMMEDIATE | len); 190 append_data(desc, data, len); 191 } 192 193 #define APPEND_CMD_RET(cmd, op) \ 194 static inline u32 *append_##cmd(u32 * const desc, u32 options) \ 195 { \ 196 u32 *cmd = desc_end(desc); \ 197 PRINT_POS; \ 198 append_cmd(desc, CMD_##op | options); \ 199 return cmd; \ 200 } 201 APPEND_CMD_RET(jump, JUMP) 202 APPEND_CMD_RET(move, MOVE) 203 APPEND_CMD_RET(move_len, MOVE_LEN) 204 205 static inline void set_jump_tgt_here(u32 * const desc, u32 *jump_cmd) 206 { 207 *jump_cmd = cpu_to_caam32(caam32_to_cpu(*jump_cmd) | 208 (desc_len(desc) - (jump_cmd - desc))); 209 } 210 211 static inline void set_move_tgt_here(u32 * const desc, u32 *move_cmd) 212 { 213 u32 val = caam32_to_cpu(*move_cmd); 214 215 val &= ~MOVE_OFFSET_MASK; 216 val |= (desc_len(desc) << (MOVE_OFFSET_SHIFT + 2)) & MOVE_OFFSET_MASK; 217 *move_cmd = cpu_to_caam32(val); 218 } 219 220 #define APPEND_CMD(cmd, op) \ 221 static inline void append_##cmd(u32 * const desc, u32 options) \ 222 { \ 223 PRINT_POS; \ 224 append_cmd(desc, CMD_##op | options); \ 225 } 226 APPEND_CMD(operation, OPERATION) 227 228 #define APPEND_CMD_LEN(cmd, op) \ 229 static inline void append_##cmd(u32 * const desc, unsigned int len, \ 230 u32 options) \ 231 { \ 232 PRINT_POS; \ 233 append_cmd(desc, CMD_##op | len | options); \ 234 } 235 236 APPEND_CMD_LEN(seq_load, SEQ_LOAD) 237 APPEND_CMD_LEN(seq_store, SEQ_STORE) 238 APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD) 239 APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE) 240 241 #define APPEND_CMD_PTR(cmd, op) \ 242 static inline void append_##cmd(u32 * const desc, dma_addr_t ptr, \ 243 unsigned int len, u32 options) \ 244 { \ 245 PRINT_POS; \ 246 append_cmd_ptr(desc, ptr, len, CMD_##op | options); \ 247 } 248 APPEND_CMD_PTR(key, KEY) 249 APPEND_CMD_PTR(load, LOAD) 250 APPEND_CMD_PTR(fifo_load, FIFO_LOAD) 251 APPEND_CMD_PTR(fifo_store, FIFO_STORE) 252 253 static inline void append_store(u32 * const desc, dma_addr_t ptr, 254 unsigned int len, u32 options) 255 { 256 u32 cmd_src; 257 258 cmd_src = options & LDST_SRCDST_MASK; 259 260 append_cmd(desc, CMD_STORE | options | len); 261 262 /* The following options do not require pointer */ 263 if (!(cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED || 264 cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB || 265 cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB_WE || 266 cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED_WE)) 267 append_ptr(desc, ptr); 268 } 269 270 #define APPEND_SEQ_PTR_INTLEN(cmd, op) \ 271 static inline void append_seq_##cmd##_ptr_intlen(u32 * const desc, \ 272 dma_addr_t ptr, \ 273 unsigned int len, \ 274 u32 options) \ 275 { \ 276 PRINT_POS; \ 277 if (options & (SQIN_RTO | SQIN_PRE)) \ 278 append_cmd(desc, CMD_SEQ_##op##_PTR | len | options); \ 279 else \ 280 append_cmd_ptr(desc, ptr, len, CMD_SEQ_##op##_PTR | options); \ 281 } 282 APPEND_SEQ_PTR_INTLEN(in, IN) 283 APPEND_SEQ_PTR_INTLEN(out, OUT) 284 285 #define APPEND_CMD_PTR_TO_IMM(cmd, op) \ 286 static inline void append_##cmd##_as_imm(u32 * const desc, const void *data, \ 287 unsigned int len, u32 options) \ 288 { \ 289 PRINT_POS; \ 290 append_cmd_data(desc, data, len, CMD_##op | options); \ 291 } 292 APPEND_CMD_PTR_TO_IMM(load, LOAD); 293 APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD); 294 295 #define APPEND_CMD_PTR_EXTLEN(cmd, op) \ 296 static inline void append_##cmd##_extlen(u32 * const desc, dma_addr_t ptr, \ 297 unsigned int len, u32 options) \ 298 { \ 299 PRINT_POS; \ 300 append_cmd_ptr_extlen(desc, ptr, len, CMD_##op | SQIN_EXT | options); \ 301 } 302 APPEND_CMD_PTR_EXTLEN(seq_in_ptr, SEQ_IN_PTR) 303 APPEND_CMD_PTR_EXTLEN(seq_out_ptr, SEQ_OUT_PTR) 304 305 /* 306 * Determine whether to store length internally or externally depending on 307 * the size of its type 308 */ 309 #define APPEND_CMD_PTR_LEN(cmd, op, type) \ 310 static inline void append_##cmd(u32 * const desc, dma_addr_t ptr, \ 311 type len, u32 options) \ 312 { \ 313 PRINT_POS; \ 314 if (sizeof(type) > sizeof(u16)) \ 315 append_##cmd##_extlen(desc, ptr, len, options); \ 316 else \ 317 append_##cmd##_intlen(desc, ptr, len, options); \ 318 } 319 APPEND_CMD_PTR_LEN(seq_in_ptr, SEQ_IN_PTR, u32) 320 APPEND_CMD_PTR_LEN(seq_out_ptr, SEQ_OUT_PTR, u32) 321 322 /* 323 * 2nd variant for commands whose specified immediate length differs 324 * from length of immediate data provided, e.g., split keys 325 */ 326 #define APPEND_CMD_PTR_TO_IMM2(cmd, op) \ 327 static inline void append_##cmd##_as_imm(u32 * const desc, const void *data, \ 328 unsigned int data_len, \ 329 unsigned int len, u32 options) \ 330 { \ 331 PRINT_POS; \ 332 append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \ 333 append_data(desc, data, data_len); \ 334 } 335 APPEND_CMD_PTR_TO_IMM2(key, KEY); 336 337 #define APPEND_CMD_RAW_IMM(cmd, op, type) \ 338 static inline void append_##cmd##_imm_##type(u32 * const desc, type immediate, \ 339 u32 options) \ 340 { \ 341 PRINT_POS; \ 342 if (options & LDST_LEN_MASK) \ 343 append_cmd(desc, CMD_##op | IMMEDIATE | options); \ 344 else \ 345 append_cmd(desc, CMD_##op | IMMEDIATE | options | \ 346 sizeof(type)); \ 347 append_cmd(desc, immediate); \ 348 } 349 APPEND_CMD_RAW_IMM(load, LOAD, u32); 350 351 /* 352 * ee - endianness 353 * size - size of immediate type in bytes 354 */ 355 #define APPEND_CMD_RAW_IMM2(cmd, op, ee, size) \ 356 static inline void append_##cmd##_imm_##ee##size(u32 *desc, \ 357 u##size immediate, \ 358 u32 options) \ 359 { \ 360 __##ee##size data = cpu_to_##ee##size(immediate); \ 361 PRINT_POS; \ 362 append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(data)); \ 363 append_data(desc, &data, sizeof(data)); \ 364 } 365 366 APPEND_CMD_RAW_IMM2(load, LOAD, be, 32); 367 368 /* 369 * Append math command. Only the last part of destination and source need to 370 * be specified 371 */ 372 #define APPEND_MATH(op, desc, dest, src_0, src_1, len) \ 373 append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \ 374 MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32)len); 375 376 #define append_math_add(desc, dest, src0, src1, len) \ 377 APPEND_MATH(ADD, desc, dest, src0, src1, len) 378 #define append_math_sub(desc, dest, src0, src1, len) \ 379 APPEND_MATH(SUB, desc, dest, src0, src1, len) 380 #define append_math_add_c(desc, dest, src0, src1, len) \ 381 APPEND_MATH(ADDC, desc, dest, src0, src1, len) 382 #define append_math_sub_b(desc, dest, src0, src1, len) \ 383 APPEND_MATH(SUBB, desc, dest, src0, src1, len) 384 #define append_math_and(desc, dest, src0, src1, len) \ 385 APPEND_MATH(AND, desc, dest, src0, src1, len) 386 #define append_math_or(desc, dest, src0, src1, len) \ 387 APPEND_MATH(OR, desc, dest, src0, src1, len) 388 #define append_math_xor(desc, dest, src0, src1, len) \ 389 APPEND_MATH(XOR, desc, dest, src0, src1, len) 390 #define append_math_lshift(desc, dest, src0, src1, len) \ 391 APPEND_MATH(LSHIFT, desc, dest, src0, src1, len) 392 #define append_math_rshift(desc, dest, src0, src1, len) \ 393 APPEND_MATH(RSHIFT, desc, dest, src0, src1, len) 394 #define append_math_ldshift(desc, dest, src0, src1, len) \ 395 APPEND_MATH(SHLD, desc, dest, src0, src1, len) 396 397 /* Exactly one source is IMM. Data is passed in as u32 value */ 398 #define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \ 399 do { \ 400 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \ 401 append_cmd(desc, data); \ 402 } while (0) 403 404 #define append_math_add_imm_u32(desc, dest, src0, src1, data) \ 405 APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data) 406 #define append_math_sub_imm_u32(desc, dest, src0, src1, data) \ 407 APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data) 408 #define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \ 409 APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data) 410 #define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \ 411 APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data) 412 #define append_math_and_imm_u32(desc, dest, src0, src1, data) \ 413 APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data) 414 #define append_math_or_imm_u32(desc, dest, src0, src1, data) \ 415 APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data) 416 #define append_math_xor_imm_u32(desc, dest, src0, src1, data) \ 417 APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data) 418 #define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \ 419 APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data) 420 #define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \ 421 APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data) 422 423 /* Exactly one source is IMM. Data is passed in as u64 value */ 424 #define APPEND_MATH_IMM_u64(op, desc, dest, src_0, src_1, data) \ 425 do { \ 426 u32 upper = (data >> 16) >> 16; \ 427 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ * 2 | \ 428 (upper ? 0 : MATH_IFB)); \ 429 if (upper) \ 430 append_u64(desc, data); \ 431 else \ 432 append_u32(desc, lower_32_bits(data)); \ 433 } while (0) 434 435 #define append_math_add_imm_u64(desc, dest, src0, src1, data) \ 436 APPEND_MATH_IMM_u64(ADD, desc, dest, src0, src1, data) 437 #define append_math_sub_imm_u64(desc, dest, src0, src1, data) \ 438 APPEND_MATH_IMM_u64(SUB, desc, dest, src0, src1, data) 439 #define append_math_add_c_imm_u64(desc, dest, src0, src1, data) \ 440 APPEND_MATH_IMM_u64(ADDC, desc, dest, src0, src1, data) 441 #define append_math_sub_b_imm_u64(desc, dest, src0, src1, data) \ 442 APPEND_MATH_IMM_u64(SUBB, desc, dest, src0, src1, data) 443 #define append_math_and_imm_u64(desc, dest, src0, src1, data) \ 444 APPEND_MATH_IMM_u64(AND, desc, dest, src0, src1, data) 445 #define append_math_or_imm_u64(desc, dest, src0, src1, data) \ 446 APPEND_MATH_IMM_u64(OR, desc, dest, src0, src1, data) 447 #define append_math_xor_imm_u64(desc, dest, src0, src1, data) \ 448 APPEND_MATH_IMM_u64(XOR, desc, dest, src0, src1, data) 449 #define append_math_lshift_imm_u64(desc, dest, src0, src1, data) \ 450 APPEND_MATH_IMM_u64(LSHIFT, desc, dest, src0, src1, data) 451 #define append_math_rshift_imm_u64(desc, dest, src0, src1, data) \ 452 APPEND_MATH_IMM_u64(RSHIFT, desc, dest, src0, src1, data) 453 454 /** 455 * struct alginfo - Container for algorithm details 456 * @algtype: algorithm selector; for valid values, see documentation of the 457 * functions where it is used. 458 * @keylen: length of the provided algorithm key, in bytes 459 * @keylen_pad: padded length of the provided algorithm key, in bytes 460 * @key: address where algorithm key resides; virtual address if key_inline 461 * is true, dma (bus) address if key_inline is false. 462 * @key_inline: true - key can be inlined in the descriptor; false - key is 463 * referenced by the descriptor 464 */ 465 struct alginfo { 466 u32 algtype; 467 unsigned int keylen; 468 unsigned int keylen_pad; 469 union { 470 dma_addr_t key_dma; 471 const void *key_virt; 472 }; 473 bool key_inline; 474 }; 475 476 /** 477 * desc_inline_query() - Provide indications on which data items can be inlined 478 * and which shall be referenced in a shared descriptor. 479 * @sd_base_len: Shared descriptor base length - bytes consumed by the commands, 480 * excluding the data items to be inlined (or corresponding 481 * pointer if an item is not inlined). Each cnstr_* function that 482 * generates descriptors should have a define mentioning 483 * corresponding length. 484 * @jd_len: Maximum length of the job descriptor(s) that will be used 485 * together with the shared descriptor. 486 * @data_len: Array of lengths of the data items trying to be inlined 487 * @inl_mask: 32bit mask with bit x = 1 if data item x can be inlined, 0 488 * otherwise. 489 * @count: Number of data items (size of @data_len array); must be <= 32 490 * 491 * Return: 0 if data can be inlined / referenced, negative value if not. If 0, 492 * check @inl_mask for details. 493 */ 494 static inline int desc_inline_query(unsigned int sd_base_len, 495 unsigned int jd_len, unsigned int *data_len, 496 u32 *inl_mask, unsigned int count) 497 { 498 int rem_bytes = (int)(CAAM_DESC_BYTES_MAX - sd_base_len - jd_len); 499 unsigned int i; 500 501 *inl_mask = 0; 502 for (i = 0; (i < count) && (rem_bytes > 0); i++) { 503 if (rem_bytes - (int)(data_len[i] + 504 (count - i - 1) * CAAM_PTR_SZ) >= 0) { 505 rem_bytes -= data_len[i]; 506 *inl_mask |= (1 << i); 507 } else { 508 rem_bytes -= CAAM_PTR_SZ; 509 } 510 } 511 512 return (rem_bytes >= 0) ? 0 : -1; 513 } 514 515 /** 516 * append_proto_dkp - Derived Key Protocol (DKP): key -> split key 517 * @desc: pointer to buffer used for descriptor construction 518 * @adata: pointer to authentication transform definitions. 519 * keylen should be the length of initial key, while keylen_pad 520 * the length of the derived (split) key. 521 * Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1, SHA224, 522 * SHA256, SHA384, SHA512}. 523 */ 524 static inline void append_proto_dkp(u32 * const desc, struct alginfo *adata) 525 { 526 u32 protid; 527 528 /* 529 * Quick & dirty translation from OP_ALG_ALGSEL_{MD5, SHA*} 530 * to OP_PCLID_DKP_{MD5, SHA*} 531 */ 532 protid = (adata->algtype & OP_ALG_ALGSEL_SUBMASK) | 533 (0x20 << OP_ALG_ALGSEL_SHIFT); 534 535 if (adata->key_inline) { 536 int words; 537 538 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid | 539 OP_PCL_DKP_SRC_IMM | OP_PCL_DKP_DST_IMM | 540 adata->keylen); 541 append_data(desc, adata->key_virt, adata->keylen); 542 543 /* Reserve space in descriptor buffer for the derived key */ 544 words = (ALIGN(adata->keylen_pad, CAAM_CMD_SZ) - 545 ALIGN(adata->keylen, CAAM_CMD_SZ)) / CAAM_CMD_SZ; 546 if (words) 547 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + words); 548 } else { 549 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid | 550 OP_PCL_DKP_SRC_PTR | OP_PCL_DKP_DST_PTR | 551 adata->keylen); 552 append_ptr(desc, adata->key_dma); 553 } 554 } 555 556 #endif /* DESC_CONSTR_H */ 557