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 caam_ptr_sz 18 #define CAAM_PTR_SZ_MAX sizeof(dma_addr_t) 19 #define CAAM_PTR_SZ_MIN sizeof(u32) 20 #define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * MAX_CAAM_DESCSIZE) 21 #define __DESC_JOB_IO_LEN(n) (CAAM_CMD_SZ * 5 + (n) * 3) 22 #define DESC_JOB_IO_LEN __DESC_JOB_IO_LEN(CAAM_PTR_SZ) 23 #define DESC_JOB_IO_LEN_MAX __DESC_JOB_IO_LEN(CAAM_PTR_SZ_MAX) 24 #define DESC_JOB_IO_LEN_MIN __DESC_JOB_IO_LEN(CAAM_PTR_SZ_MIN) 25 26 /* 27 * The CAAM QI hardware constructs a job descriptor which points 28 * to shared descriptor (as pointed by context_a of FQ to CAAM). 29 * When the job descriptor is executed by deco, the whole job 30 * descriptor together with shared descriptor gets loaded in 31 * deco buffer which is 64 words long (each 32-bit). 32 * 33 * The job descriptor constructed by QI hardware has layout: 34 * 35 * HEADER (1 word) 36 * Shdesc ptr (1 or 2 words) 37 * SEQ_OUT_PTR (1 word) 38 * Out ptr (1 or 2 words) 39 * Out length (1 word) 40 * SEQ_IN_PTR (1 word) 41 * In ptr (1 or 2 words) 42 * In length (1 word) 43 * 44 * The shdesc ptr is used to fetch shared descriptor contents 45 * into deco buffer. 46 * 47 * Apart from shdesc contents, the total number of words that 48 * get loaded in deco buffer are '8' or '11'. The remaining words 49 * in deco buffer can be used for storing shared descriptor. 50 */ 51 #define MAX_SDLEN ((CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN_MIN) / CAAM_CMD_SZ) 52 53 #ifdef DEBUG 54 #define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\ 55 &__func__[sizeof("append")]); } while (0) 56 #else 57 #define PRINT_POS 58 #endif 59 60 #define SET_OK_NO_PROP_ERRORS (IMMEDIATE | LDST_CLASS_DECO | \ 61 LDST_SRCDST_WORD_DECOCTRL | \ 62 (LDOFF_CHG_SHARE_OK_NO_PROP << \ 63 LDST_OFFSET_SHIFT)) 64 #define DISABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \ 65 LDST_SRCDST_WORD_DECOCTRL | \ 66 (LDOFF_DISABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT)) 67 #define ENABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \ 68 LDST_SRCDST_WORD_DECOCTRL | \ 69 (LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT)) 70 71 extern bool caam_little_end; 72 extern size_t caam_ptr_sz; 73 74 /* 75 * HW fetches 4 S/G table entries at a time, irrespective of how many entries 76 * are in the table. It's SW's responsibility to make sure these accesses 77 * do not have side effects. 78 */ 79 static inline int pad_sg_nents(int sg_nents) 80 { 81 return ALIGN(sg_nents, 4); 82 } 83 84 static inline int desc_len(u32 * const desc) 85 { 86 return caam32_to_cpu(*desc) & HDR_DESCLEN_MASK; 87 } 88 89 static inline int desc_bytes(void * const desc) 90 { 91 return desc_len(desc) * CAAM_CMD_SZ; 92 } 93 94 static inline u32 *desc_end(u32 * const desc) 95 { 96 return desc + desc_len(desc); 97 } 98 99 static inline void *sh_desc_pdb(u32 * const desc) 100 { 101 return desc + 1; 102 } 103 104 static inline void init_desc(u32 * const desc, u32 options) 105 { 106 *desc = cpu_to_caam32((options | HDR_ONE) + 1); 107 } 108 109 static inline void init_sh_desc(u32 * const desc, u32 options) 110 { 111 PRINT_POS; 112 init_desc(desc, CMD_SHARED_DESC_HDR | options); 113 } 114 115 static inline void init_sh_desc_pdb(u32 * const desc, u32 options, 116 size_t pdb_bytes) 117 { 118 u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ; 119 120 init_sh_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT) + pdb_len) | 121 options); 122 } 123 124 static inline void init_job_desc(u32 * const desc, u32 options) 125 { 126 init_desc(desc, CMD_DESC_HDR | options); 127 } 128 129 static inline void init_job_desc_pdb(u32 * const desc, u32 options, 130 size_t pdb_bytes) 131 { 132 u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ; 133 134 init_job_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT)) | options); 135 } 136 137 static inline void append_ptr(u32 * const desc, dma_addr_t ptr) 138 { 139 if (caam_ptr_sz == sizeof(dma_addr_t)) { 140 dma_addr_t *offset = (dma_addr_t *)desc_end(desc); 141 142 *offset = cpu_to_caam_dma(ptr); 143 } else { 144 u32 *offset = (u32 *)desc_end(desc); 145 146 *offset = cpu_to_caam_dma(ptr); 147 } 148 149 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 150 CAAM_PTR_SZ / CAAM_CMD_SZ); 151 } 152 153 static inline void init_job_desc_shared(u32 * const desc, dma_addr_t ptr, 154 int len, u32 options) 155 { 156 PRINT_POS; 157 init_job_desc(desc, HDR_SHARED | options | 158 (len << HDR_START_IDX_SHIFT)); 159 append_ptr(desc, ptr); 160 } 161 162 static inline void append_data(u32 * const desc, const void *data, int len) 163 { 164 u32 *offset = desc_end(desc); 165 166 /* Avoid gcc warning: memcpy with data == NULL */ 167 if (!IS_ENABLED(CONFIG_CRYPTO_DEV_FSL_CAAM_DEBUG) || data) 168 memcpy(offset, data, len); 169 170 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 171 (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ); 172 } 173 174 static inline void append_cmd(u32 * const desc, u32 command) 175 { 176 u32 *cmd = desc_end(desc); 177 178 *cmd = cpu_to_caam32(command); 179 180 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 1); 181 } 182 183 #define append_u32 append_cmd 184 185 static inline void append_u64(u32 * const desc, u64 data) 186 { 187 u32 *offset = desc_end(desc); 188 189 /* Only 32-bit alignment is guaranteed in descriptor buffer */ 190 if (caam_little_end) { 191 *offset = cpu_to_caam32(lower_32_bits(data)); 192 *(++offset) = cpu_to_caam32(upper_32_bits(data)); 193 } else { 194 *offset = cpu_to_caam32(upper_32_bits(data)); 195 *(++offset) = cpu_to_caam32(lower_32_bits(data)); 196 } 197 198 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 2); 199 } 200 201 /* Write command without affecting header, and return pointer to next word */ 202 static inline u32 *write_cmd(u32 * const desc, u32 command) 203 { 204 *desc = cpu_to_caam32(command); 205 206 return desc + 1; 207 } 208 209 static inline void append_cmd_ptr(u32 * const desc, dma_addr_t ptr, int len, 210 u32 command) 211 { 212 append_cmd(desc, command | len); 213 append_ptr(desc, ptr); 214 } 215 216 /* Write length after pointer, rather than inside command */ 217 static inline void append_cmd_ptr_extlen(u32 * const desc, dma_addr_t ptr, 218 unsigned int len, u32 command) 219 { 220 append_cmd(desc, command); 221 if (!(command & (SQIN_RTO | SQIN_PRE))) 222 append_ptr(desc, ptr); 223 append_cmd(desc, len); 224 } 225 226 static inline void append_cmd_data(u32 * const desc, const void *data, int len, 227 u32 command) 228 { 229 append_cmd(desc, command | IMMEDIATE | len); 230 append_data(desc, data, len); 231 } 232 233 #define APPEND_CMD_RET(cmd, op) \ 234 static inline u32 *append_##cmd(u32 * const desc, u32 options) \ 235 { \ 236 u32 *cmd = desc_end(desc); \ 237 PRINT_POS; \ 238 append_cmd(desc, CMD_##op | options); \ 239 return cmd; \ 240 } 241 APPEND_CMD_RET(jump, JUMP) 242 APPEND_CMD_RET(move, MOVE) 243 APPEND_CMD_RET(move_len, MOVE_LEN) 244 245 static inline void set_jump_tgt_here(u32 * const desc, u32 *jump_cmd) 246 { 247 *jump_cmd = cpu_to_caam32(caam32_to_cpu(*jump_cmd) | 248 (desc_len(desc) - (jump_cmd - desc))); 249 } 250 251 static inline void set_move_tgt_here(u32 * const desc, u32 *move_cmd) 252 { 253 u32 val = caam32_to_cpu(*move_cmd); 254 255 val &= ~MOVE_OFFSET_MASK; 256 val |= (desc_len(desc) << (MOVE_OFFSET_SHIFT + 2)) & MOVE_OFFSET_MASK; 257 *move_cmd = cpu_to_caam32(val); 258 } 259 260 #define APPEND_CMD(cmd, op) \ 261 static inline void append_##cmd(u32 * const desc, u32 options) \ 262 { \ 263 PRINT_POS; \ 264 append_cmd(desc, CMD_##op | options); \ 265 } 266 APPEND_CMD(operation, OPERATION) 267 268 #define APPEND_CMD_LEN(cmd, op) \ 269 static inline void append_##cmd(u32 * const desc, unsigned int len, \ 270 u32 options) \ 271 { \ 272 PRINT_POS; \ 273 append_cmd(desc, CMD_##op | len | options); \ 274 } 275 276 APPEND_CMD_LEN(seq_load, SEQ_LOAD) 277 APPEND_CMD_LEN(seq_store, SEQ_STORE) 278 APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD) 279 APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE) 280 281 #define APPEND_CMD_PTR(cmd, op) \ 282 static inline void append_##cmd(u32 * const desc, dma_addr_t ptr, \ 283 unsigned int len, u32 options) \ 284 { \ 285 PRINT_POS; \ 286 append_cmd_ptr(desc, ptr, len, CMD_##op | options); \ 287 } 288 APPEND_CMD_PTR(key, KEY) 289 APPEND_CMD_PTR(load, LOAD) 290 APPEND_CMD_PTR(fifo_load, FIFO_LOAD) 291 APPEND_CMD_PTR(fifo_store, FIFO_STORE) 292 293 static inline void append_store(u32 * const desc, dma_addr_t ptr, 294 unsigned int len, u32 options) 295 { 296 u32 cmd_src; 297 298 cmd_src = options & LDST_SRCDST_MASK; 299 300 append_cmd(desc, CMD_STORE | options | len); 301 302 /* The following options do not require pointer */ 303 if (!(cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED || 304 cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB || 305 cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB_WE || 306 cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED_WE)) 307 append_ptr(desc, ptr); 308 } 309 310 #define APPEND_SEQ_PTR_INTLEN(cmd, op) \ 311 static inline void append_seq_##cmd##_ptr_intlen(u32 * const desc, \ 312 dma_addr_t ptr, \ 313 unsigned int len, \ 314 u32 options) \ 315 { \ 316 PRINT_POS; \ 317 if (options & (SQIN_RTO | SQIN_PRE)) \ 318 append_cmd(desc, CMD_SEQ_##op##_PTR | len | options); \ 319 else \ 320 append_cmd_ptr(desc, ptr, len, CMD_SEQ_##op##_PTR | options); \ 321 } 322 APPEND_SEQ_PTR_INTLEN(in, IN) 323 APPEND_SEQ_PTR_INTLEN(out, OUT) 324 325 #define APPEND_CMD_PTR_TO_IMM(cmd, op) \ 326 static inline void append_##cmd##_as_imm(u32 * const desc, const void *data, \ 327 unsigned int len, u32 options) \ 328 { \ 329 PRINT_POS; \ 330 append_cmd_data(desc, data, len, CMD_##op | options); \ 331 } 332 APPEND_CMD_PTR_TO_IMM(load, LOAD); 333 APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD); 334 335 #define APPEND_CMD_PTR_EXTLEN(cmd, op) \ 336 static inline void append_##cmd##_extlen(u32 * const desc, dma_addr_t ptr, \ 337 unsigned int len, u32 options) \ 338 { \ 339 PRINT_POS; \ 340 append_cmd_ptr_extlen(desc, ptr, len, CMD_##op | SQIN_EXT | options); \ 341 } 342 APPEND_CMD_PTR_EXTLEN(seq_in_ptr, SEQ_IN_PTR) 343 APPEND_CMD_PTR_EXTLEN(seq_out_ptr, SEQ_OUT_PTR) 344 345 /* 346 * Determine whether to store length internally or externally depending on 347 * the size of its type 348 */ 349 #define APPEND_CMD_PTR_LEN(cmd, op, type) \ 350 static inline void append_##cmd(u32 * const desc, dma_addr_t ptr, \ 351 type len, u32 options) \ 352 { \ 353 PRINT_POS; \ 354 if (sizeof(type) > sizeof(u16)) \ 355 append_##cmd##_extlen(desc, ptr, len, options); \ 356 else \ 357 append_##cmd##_intlen(desc, ptr, len, options); \ 358 } 359 APPEND_CMD_PTR_LEN(seq_in_ptr, SEQ_IN_PTR, u32) 360 APPEND_CMD_PTR_LEN(seq_out_ptr, SEQ_OUT_PTR, u32) 361 362 /* 363 * 2nd variant for commands whose specified immediate length differs 364 * from length of immediate data provided, e.g., split keys 365 */ 366 #define APPEND_CMD_PTR_TO_IMM2(cmd, op) \ 367 static inline void append_##cmd##_as_imm(u32 * const desc, const void *data, \ 368 unsigned int data_len, \ 369 unsigned int len, u32 options) \ 370 { \ 371 PRINT_POS; \ 372 append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \ 373 append_data(desc, data, data_len); \ 374 } 375 APPEND_CMD_PTR_TO_IMM2(key, KEY); 376 377 #define APPEND_CMD_RAW_IMM(cmd, op, type) \ 378 static inline void append_##cmd##_imm_##type(u32 * const desc, type immediate, \ 379 u32 options) \ 380 { \ 381 PRINT_POS; \ 382 if (options & LDST_LEN_MASK) \ 383 append_cmd(desc, CMD_##op | IMMEDIATE | options); \ 384 else \ 385 append_cmd(desc, CMD_##op | IMMEDIATE | options | \ 386 sizeof(type)); \ 387 append_cmd(desc, immediate); \ 388 } 389 APPEND_CMD_RAW_IMM(load, LOAD, u32); 390 391 /* 392 * ee - endianness 393 * size - size of immediate type in bytes 394 */ 395 #define APPEND_CMD_RAW_IMM2(cmd, op, ee, size) \ 396 static inline void append_##cmd##_imm_##ee##size(u32 *desc, \ 397 u##size immediate, \ 398 u32 options) \ 399 { \ 400 __##ee##size data = cpu_to_##ee##size(immediate); \ 401 PRINT_POS; \ 402 append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(data)); \ 403 append_data(desc, &data, sizeof(data)); \ 404 } 405 406 APPEND_CMD_RAW_IMM2(load, LOAD, be, 32); 407 408 /* 409 * Append math command. Only the last part of destination and source need to 410 * be specified 411 */ 412 #define APPEND_MATH(op, desc, dest, src_0, src_1, len) \ 413 append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \ 414 MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32)len); 415 416 #define append_math_add(desc, dest, src0, src1, len) \ 417 APPEND_MATH(ADD, desc, dest, src0, src1, len) 418 #define append_math_sub(desc, dest, src0, src1, len) \ 419 APPEND_MATH(SUB, desc, dest, src0, src1, len) 420 #define append_math_add_c(desc, dest, src0, src1, len) \ 421 APPEND_MATH(ADDC, desc, dest, src0, src1, len) 422 #define append_math_sub_b(desc, dest, src0, src1, len) \ 423 APPEND_MATH(SUBB, desc, dest, src0, src1, len) 424 #define append_math_and(desc, dest, src0, src1, len) \ 425 APPEND_MATH(AND, desc, dest, src0, src1, len) 426 #define append_math_or(desc, dest, src0, src1, len) \ 427 APPEND_MATH(OR, desc, dest, src0, src1, len) 428 #define append_math_xor(desc, dest, src0, src1, len) \ 429 APPEND_MATH(XOR, desc, dest, src0, src1, len) 430 #define append_math_lshift(desc, dest, src0, src1, len) \ 431 APPEND_MATH(LSHIFT, desc, dest, src0, src1, len) 432 #define append_math_rshift(desc, dest, src0, src1, len) \ 433 APPEND_MATH(RSHIFT, desc, dest, src0, src1, len) 434 #define append_math_ldshift(desc, dest, src0, src1, len) \ 435 APPEND_MATH(SHLD, desc, dest, src0, src1, len) 436 437 /* Exactly one source is IMM. Data is passed in as u32 value */ 438 #define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \ 439 do { \ 440 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \ 441 append_cmd(desc, data); \ 442 } while (0) 443 444 #define append_math_add_imm_u32(desc, dest, src0, src1, data) \ 445 APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data) 446 #define append_math_sub_imm_u32(desc, dest, src0, src1, data) \ 447 APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data) 448 #define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \ 449 APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data) 450 #define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \ 451 APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data) 452 #define append_math_and_imm_u32(desc, dest, src0, src1, data) \ 453 APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data) 454 #define append_math_or_imm_u32(desc, dest, src0, src1, data) \ 455 APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data) 456 #define append_math_xor_imm_u32(desc, dest, src0, src1, data) \ 457 APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data) 458 #define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \ 459 APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data) 460 #define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \ 461 APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data) 462 463 /* Exactly one source is IMM. Data is passed in as u64 value */ 464 #define APPEND_MATH_IMM_u64(op, desc, dest, src_0, src_1, data) \ 465 do { \ 466 u32 upper = (data >> 16) >> 16; \ 467 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ * 2 | \ 468 (upper ? 0 : MATH_IFB)); \ 469 if (upper) \ 470 append_u64(desc, data); \ 471 else \ 472 append_u32(desc, lower_32_bits(data)); \ 473 } while (0) 474 475 #define append_math_add_imm_u64(desc, dest, src0, src1, data) \ 476 APPEND_MATH_IMM_u64(ADD, desc, dest, src0, src1, data) 477 #define append_math_sub_imm_u64(desc, dest, src0, src1, data) \ 478 APPEND_MATH_IMM_u64(SUB, desc, dest, src0, src1, data) 479 #define append_math_add_c_imm_u64(desc, dest, src0, src1, data) \ 480 APPEND_MATH_IMM_u64(ADDC, desc, dest, src0, src1, data) 481 #define append_math_sub_b_imm_u64(desc, dest, src0, src1, data) \ 482 APPEND_MATH_IMM_u64(SUBB, desc, dest, src0, src1, data) 483 #define append_math_and_imm_u64(desc, dest, src0, src1, data) \ 484 APPEND_MATH_IMM_u64(AND, desc, dest, src0, src1, data) 485 #define append_math_or_imm_u64(desc, dest, src0, src1, data) \ 486 APPEND_MATH_IMM_u64(OR, desc, dest, src0, src1, data) 487 #define append_math_xor_imm_u64(desc, dest, src0, src1, data) \ 488 APPEND_MATH_IMM_u64(XOR, desc, dest, src0, src1, data) 489 #define append_math_lshift_imm_u64(desc, dest, src0, src1, data) \ 490 APPEND_MATH_IMM_u64(LSHIFT, desc, dest, src0, src1, data) 491 #define append_math_rshift_imm_u64(desc, dest, src0, src1, data) \ 492 APPEND_MATH_IMM_u64(RSHIFT, desc, dest, src0, src1, data) 493 494 /** 495 * struct alginfo - Container for algorithm details 496 * @algtype: algorithm selector; for valid values, see documentation of the 497 * functions where it is used. 498 * @keylen: length of the provided algorithm key, in bytes 499 * @keylen_pad: padded length of the provided algorithm key, in bytes 500 * @key_dma: dma (bus) address where algorithm key resides 501 * @key_virt: virtual address where algorithm key resides 502 * @key_inline: true - key can be inlined in the descriptor; false - key is 503 * referenced by the descriptor 504 */ 505 struct alginfo { 506 u32 algtype; 507 unsigned int keylen; 508 unsigned int keylen_pad; 509 dma_addr_t key_dma; 510 const void *key_virt; 511 bool key_inline; 512 }; 513 514 /** 515 * desc_inline_query() - Provide indications on which data items can be inlined 516 * and which shall be referenced in a shared descriptor. 517 * @sd_base_len: Shared descriptor base length - bytes consumed by the commands, 518 * excluding the data items to be inlined (or corresponding 519 * pointer if an item is not inlined). Each cnstr_* function that 520 * generates descriptors should have a define mentioning 521 * corresponding length. 522 * @jd_len: Maximum length of the job descriptor(s) that will be used 523 * together with the shared descriptor. 524 * @data_len: Array of lengths of the data items trying to be inlined 525 * @inl_mask: 32bit mask with bit x = 1 if data item x can be inlined, 0 526 * otherwise. 527 * @count: Number of data items (size of @data_len array); must be <= 32 528 * 529 * Return: 0 if data can be inlined / referenced, negative value if not. If 0, 530 * check @inl_mask for details. 531 */ 532 static inline int desc_inline_query(unsigned int sd_base_len, 533 unsigned int jd_len, unsigned int *data_len, 534 u32 *inl_mask, unsigned int count) 535 { 536 int rem_bytes = (int)(CAAM_DESC_BYTES_MAX - sd_base_len - jd_len); 537 unsigned int i; 538 539 *inl_mask = 0; 540 for (i = 0; (i < count) && (rem_bytes > 0); i++) { 541 if (rem_bytes - (int)(data_len[i] + 542 (count - i - 1) * CAAM_PTR_SZ) >= 0) { 543 rem_bytes -= data_len[i]; 544 *inl_mask |= (1 << i); 545 } else { 546 rem_bytes -= CAAM_PTR_SZ; 547 } 548 } 549 550 return (rem_bytes >= 0) ? 0 : -1; 551 } 552 553 /** 554 * append_proto_dkp - Derived Key Protocol (DKP): key -> split key 555 * @desc: pointer to buffer used for descriptor construction 556 * @adata: pointer to authentication transform definitions. 557 * keylen should be the length of initial key, while keylen_pad 558 * the length of the derived (split) key. 559 * Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1, SHA224, 560 * SHA256, SHA384, SHA512}. 561 */ 562 static inline void append_proto_dkp(u32 * const desc, struct alginfo *adata) 563 { 564 u32 protid; 565 566 /* 567 * Quick & dirty translation from OP_ALG_ALGSEL_{MD5, SHA*} 568 * to OP_PCLID_DKP_{MD5, SHA*} 569 */ 570 protid = (adata->algtype & OP_ALG_ALGSEL_SUBMASK) | 571 (0x20 << OP_ALG_ALGSEL_SHIFT); 572 573 if (adata->key_inline) { 574 int words; 575 576 if (adata->keylen > adata->keylen_pad) { 577 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid | 578 OP_PCL_DKP_SRC_PTR | 579 OP_PCL_DKP_DST_IMM | adata->keylen); 580 append_ptr(desc, adata->key_dma); 581 582 words = (ALIGN(adata->keylen_pad, CAAM_CMD_SZ) - 583 CAAM_PTR_SZ) / CAAM_CMD_SZ; 584 } else { 585 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid | 586 OP_PCL_DKP_SRC_IMM | 587 OP_PCL_DKP_DST_IMM | adata->keylen); 588 append_data(desc, adata->key_virt, adata->keylen); 589 590 words = (ALIGN(adata->keylen_pad, CAAM_CMD_SZ) - 591 ALIGN(adata->keylen, CAAM_CMD_SZ)) / 592 CAAM_CMD_SZ; 593 } 594 595 /* Reserve space in descriptor buffer for the derived key */ 596 if (words) 597 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + words); 598 } else { 599 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid | 600 OP_PCL_DKP_SRC_PTR | OP_PCL_DKP_DST_PTR | 601 adata->keylen); 602 append_ptr(desc, adata->key_dma); 603 } 604 } 605 606 #endif /* DESC_CONSTR_H */ 607