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 if (len) /* avoid sparse warning: memcpy with byte count of 0 */ 167 memcpy(offset, data, len); 168 169 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 170 (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ); 171 } 172 173 static inline void append_cmd(u32 * const desc, u32 command) 174 { 175 u32 *cmd = desc_end(desc); 176 177 *cmd = cpu_to_caam32(command); 178 179 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 1); 180 } 181 182 #define append_u32 append_cmd 183 184 static inline void append_u64(u32 * const desc, u64 data) 185 { 186 u32 *offset = desc_end(desc); 187 188 /* Only 32-bit alignment is guaranteed in descriptor buffer */ 189 if (caam_little_end) { 190 *offset = cpu_to_caam32(lower_32_bits(data)); 191 *(++offset) = cpu_to_caam32(upper_32_bits(data)); 192 } else { 193 *offset = cpu_to_caam32(upper_32_bits(data)); 194 *(++offset) = cpu_to_caam32(lower_32_bits(data)); 195 } 196 197 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 2); 198 } 199 200 /* Write command without affecting header, and return pointer to next word */ 201 static inline u32 *write_cmd(u32 * const desc, u32 command) 202 { 203 *desc = cpu_to_caam32(command); 204 205 return desc + 1; 206 } 207 208 static inline void append_cmd_ptr(u32 * const desc, dma_addr_t ptr, int len, 209 u32 command) 210 { 211 append_cmd(desc, command | len); 212 append_ptr(desc, ptr); 213 } 214 215 /* Write length after pointer, rather than inside command */ 216 static inline void append_cmd_ptr_extlen(u32 * const desc, dma_addr_t ptr, 217 unsigned int len, u32 command) 218 { 219 append_cmd(desc, command); 220 if (!(command & (SQIN_RTO | SQIN_PRE))) 221 append_ptr(desc, ptr); 222 append_cmd(desc, len); 223 } 224 225 static inline void append_cmd_data(u32 * const desc, const void *data, int len, 226 u32 command) 227 { 228 append_cmd(desc, command | IMMEDIATE | len); 229 append_data(desc, data, len); 230 } 231 232 #define APPEND_CMD_RET(cmd, op) \ 233 static inline u32 *append_##cmd(u32 * const desc, u32 options) \ 234 { \ 235 u32 *cmd = desc_end(desc); \ 236 PRINT_POS; \ 237 append_cmd(desc, CMD_##op | options); \ 238 return cmd; \ 239 } 240 APPEND_CMD_RET(jump, JUMP) 241 APPEND_CMD_RET(move, MOVE) 242 APPEND_CMD_RET(move_len, MOVE_LEN) 243 244 static inline void set_jump_tgt_here(u32 * const desc, u32 *jump_cmd) 245 { 246 *jump_cmd = cpu_to_caam32(caam32_to_cpu(*jump_cmd) | 247 (desc_len(desc) - (jump_cmd - desc))); 248 } 249 250 static inline void set_move_tgt_here(u32 * const desc, u32 *move_cmd) 251 { 252 u32 val = caam32_to_cpu(*move_cmd); 253 254 val &= ~MOVE_OFFSET_MASK; 255 val |= (desc_len(desc) << (MOVE_OFFSET_SHIFT + 2)) & MOVE_OFFSET_MASK; 256 *move_cmd = cpu_to_caam32(val); 257 } 258 259 #define APPEND_CMD(cmd, op) \ 260 static inline void append_##cmd(u32 * const desc, u32 options) \ 261 { \ 262 PRINT_POS; \ 263 append_cmd(desc, CMD_##op | options); \ 264 } 265 APPEND_CMD(operation, OPERATION) 266 267 #define APPEND_CMD_LEN(cmd, op) \ 268 static inline void append_##cmd(u32 * const desc, unsigned int len, \ 269 u32 options) \ 270 { \ 271 PRINT_POS; \ 272 append_cmd(desc, CMD_##op | len | options); \ 273 } 274 275 APPEND_CMD_LEN(seq_load, SEQ_LOAD) 276 APPEND_CMD_LEN(seq_store, SEQ_STORE) 277 APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD) 278 APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE) 279 280 #define APPEND_CMD_PTR(cmd, op) \ 281 static inline void append_##cmd(u32 * const desc, dma_addr_t ptr, \ 282 unsigned int len, u32 options) \ 283 { \ 284 PRINT_POS; \ 285 append_cmd_ptr(desc, ptr, len, CMD_##op | options); \ 286 } 287 APPEND_CMD_PTR(key, KEY) 288 APPEND_CMD_PTR(load, LOAD) 289 APPEND_CMD_PTR(fifo_load, FIFO_LOAD) 290 APPEND_CMD_PTR(fifo_store, FIFO_STORE) 291 292 static inline void append_store(u32 * const desc, dma_addr_t ptr, 293 unsigned int len, u32 options) 294 { 295 u32 cmd_src; 296 297 cmd_src = options & LDST_SRCDST_MASK; 298 299 append_cmd(desc, CMD_STORE | options | len); 300 301 /* The following options do not require pointer */ 302 if (!(cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED || 303 cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB || 304 cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB_WE || 305 cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED_WE)) 306 append_ptr(desc, ptr); 307 } 308 309 #define APPEND_SEQ_PTR_INTLEN(cmd, op) \ 310 static inline void append_seq_##cmd##_ptr_intlen(u32 * const desc, \ 311 dma_addr_t ptr, \ 312 unsigned int len, \ 313 u32 options) \ 314 { \ 315 PRINT_POS; \ 316 if (options & (SQIN_RTO | SQIN_PRE)) \ 317 append_cmd(desc, CMD_SEQ_##op##_PTR | len | options); \ 318 else \ 319 append_cmd_ptr(desc, ptr, len, CMD_SEQ_##op##_PTR | options); \ 320 } 321 APPEND_SEQ_PTR_INTLEN(in, IN) 322 APPEND_SEQ_PTR_INTLEN(out, OUT) 323 324 #define APPEND_CMD_PTR_TO_IMM(cmd, op) \ 325 static inline void append_##cmd##_as_imm(u32 * const desc, const void *data, \ 326 unsigned int len, u32 options) \ 327 { \ 328 PRINT_POS; \ 329 append_cmd_data(desc, data, len, CMD_##op | options); \ 330 } 331 APPEND_CMD_PTR_TO_IMM(load, LOAD); 332 APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD); 333 334 #define APPEND_CMD_PTR_EXTLEN(cmd, op) \ 335 static inline void append_##cmd##_extlen(u32 * const desc, dma_addr_t ptr, \ 336 unsigned int len, u32 options) \ 337 { \ 338 PRINT_POS; \ 339 append_cmd_ptr_extlen(desc, ptr, len, CMD_##op | SQIN_EXT | options); \ 340 } 341 APPEND_CMD_PTR_EXTLEN(seq_in_ptr, SEQ_IN_PTR) 342 APPEND_CMD_PTR_EXTLEN(seq_out_ptr, SEQ_OUT_PTR) 343 344 /* 345 * Determine whether to store length internally or externally depending on 346 * the size of its type 347 */ 348 #define APPEND_CMD_PTR_LEN(cmd, op, type) \ 349 static inline void append_##cmd(u32 * const desc, dma_addr_t ptr, \ 350 type len, u32 options) \ 351 { \ 352 PRINT_POS; \ 353 if (sizeof(type) > sizeof(u16)) \ 354 append_##cmd##_extlen(desc, ptr, len, options); \ 355 else \ 356 append_##cmd##_intlen(desc, ptr, len, options); \ 357 } 358 APPEND_CMD_PTR_LEN(seq_in_ptr, SEQ_IN_PTR, u32) 359 APPEND_CMD_PTR_LEN(seq_out_ptr, SEQ_OUT_PTR, u32) 360 361 /* 362 * 2nd variant for commands whose specified immediate length differs 363 * from length of immediate data provided, e.g., split keys 364 */ 365 #define APPEND_CMD_PTR_TO_IMM2(cmd, op) \ 366 static inline void append_##cmd##_as_imm(u32 * const desc, const void *data, \ 367 unsigned int data_len, \ 368 unsigned int len, u32 options) \ 369 { \ 370 PRINT_POS; \ 371 append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \ 372 append_data(desc, data, data_len); \ 373 } 374 APPEND_CMD_PTR_TO_IMM2(key, KEY); 375 376 #define APPEND_CMD_RAW_IMM(cmd, op, type) \ 377 static inline void append_##cmd##_imm_##type(u32 * const desc, type immediate, \ 378 u32 options) \ 379 { \ 380 PRINT_POS; \ 381 if (options & LDST_LEN_MASK) \ 382 append_cmd(desc, CMD_##op | IMMEDIATE | options); \ 383 else \ 384 append_cmd(desc, CMD_##op | IMMEDIATE | options | \ 385 sizeof(type)); \ 386 append_cmd(desc, immediate); \ 387 } 388 APPEND_CMD_RAW_IMM(load, LOAD, u32); 389 390 /* 391 * ee - endianness 392 * size - size of immediate type in bytes 393 */ 394 #define APPEND_CMD_RAW_IMM2(cmd, op, ee, size) \ 395 static inline void append_##cmd##_imm_##ee##size(u32 *desc, \ 396 u##size immediate, \ 397 u32 options) \ 398 { \ 399 __##ee##size data = cpu_to_##ee##size(immediate); \ 400 PRINT_POS; \ 401 append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(data)); \ 402 append_data(desc, &data, sizeof(data)); \ 403 } 404 405 APPEND_CMD_RAW_IMM2(load, LOAD, be, 32); 406 407 /* 408 * Append math command. Only the last part of destination and source need to 409 * be specified 410 */ 411 #define APPEND_MATH(op, desc, dest, src_0, src_1, len) \ 412 append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \ 413 MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32)len); 414 415 #define append_math_add(desc, dest, src0, src1, len) \ 416 APPEND_MATH(ADD, desc, dest, src0, src1, len) 417 #define append_math_sub(desc, dest, src0, src1, len) \ 418 APPEND_MATH(SUB, desc, dest, src0, src1, len) 419 #define append_math_add_c(desc, dest, src0, src1, len) \ 420 APPEND_MATH(ADDC, desc, dest, src0, src1, len) 421 #define append_math_sub_b(desc, dest, src0, src1, len) \ 422 APPEND_MATH(SUBB, desc, dest, src0, src1, len) 423 #define append_math_and(desc, dest, src0, src1, len) \ 424 APPEND_MATH(AND, desc, dest, src0, src1, len) 425 #define append_math_or(desc, dest, src0, src1, len) \ 426 APPEND_MATH(OR, desc, dest, src0, src1, len) 427 #define append_math_xor(desc, dest, src0, src1, len) \ 428 APPEND_MATH(XOR, desc, dest, src0, src1, len) 429 #define append_math_lshift(desc, dest, src0, src1, len) \ 430 APPEND_MATH(LSHIFT, desc, dest, src0, src1, len) 431 #define append_math_rshift(desc, dest, src0, src1, len) \ 432 APPEND_MATH(RSHIFT, desc, dest, src0, src1, len) 433 #define append_math_ldshift(desc, dest, src0, src1, len) \ 434 APPEND_MATH(SHLD, desc, dest, src0, src1, len) 435 436 /* Exactly one source is IMM. Data is passed in as u32 value */ 437 #define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \ 438 do { \ 439 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \ 440 append_cmd(desc, data); \ 441 } while (0) 442 443 #define append_math_add_imm_u32(desc, dest, src0, src1, data) \ 444 APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data) 445 #define append_math_sub_imm_u32(desc, dest, src0, src1, data) \ 446 APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data) 447 #define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \ 448 APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data) 449 #define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \ 450 APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data) 451 #define append_math_and_imm_u32(desc, dest, src0, src1, data) \ 452 APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data) 453 #define append_math_or_imm_u32(desc, dest, src0, src1, data) \ 454 APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data) 455 #define append_math_xor_imm_u32(desc, dest, src0, src1, data) \ 456 APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data) 457 #define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \ 458 APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data) 459 #define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \ 460 APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data) 461 462 /* Exactly one source is IMM. Data is passed in as u64 value */ 463 #define APPEND_MATH_IMM_u64(op, desc, dest, src_0, src_1, data) \ 464 do { \ 465 u32 upper = (data >> 16) >> 16; \ 466 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ * 2 | \ 467 (upper ? 0 : MATH_IFB)); \ 468 if (upper) \ 469 append_u64(desc, data); \ 470 else \ 471 append_u32(desc, lower_32_bits(data)); \ 472 } while (0) 473 474 #define append_math_add_imm_u64(desc, dest, src0, src1, data) \ 475 APPEND_MATH_IMM_u64(ADD, desc, dest, src0, src1, data) 476 #define append_math_sub_imm_u64(desc, dest, src0, src1, data) \ 477 APPEND_MATH_IMM_u64(SUB, desc, dest, src0, src1, data) 478 #define append_math_add_c_imm_u64(desc, dest, src0, src1, data) \ 479 APPEND_MATH_IMM_u64(ADDC, desc, dest, src0, src1, data) 480 #define append_math_sub_b_imm_u64(desc, dest, src0, src1, data) \ 481 APPEND_MATH_IMM_u64(SUBB, desc, dest, src0, src1, data) 482 #define append_math_and_imm_u64(desc, dest, src0, src1, data) \ 483 APPEND_MATH_IMM_u64(AND, desc, dest, src0, src1, data) 484 #define append_math_or_imm_u64(desc, dest, src0, src1, data) \ 485 APPEND_MATH_IMM_u64(OR, desc, dest, src0, src1, data) 486 #define append_math_xor_imm_u64(desc, dest, src0, src1, data) \ 487 APPEND_MATH_IMM_u64(XOR, desc, dest, src0, src1, data) 488 #define append_math_lshift_imm_u64(desc, dest, src0, src1, data) \ 489 APPEND_MATH_IMM_u64(LSHIFT, desc, dest, src0, src1, data) 490 #define append_math_rshift_imm_u64(desc, dest, src0, src1, data) \ 491 APPEND_MATH_IMM_u64(RSHIFT, desc, dest, src0, src1, data) 492 493 /** 494 * struct alginfo - Container for algorithm details 495 * @algtype: algorithm selector; for valid values, see documentation of the 496 * functions where it is used. 497 * @keylen: length of the provided algorithm key, in bytes 498 * @keylen_pad: padded length of the provided algorithm key, in bytes 499 * @key_dma: dma (bus) address where algorithm key resides 500 * @key_virt: virtual address where algorithm key resides 501 * @key_inline: true - key can be inlined in the descriptor; false - key is 502 * referenced by the descriptor 503 */ 504 struct alginfo { 505 u32 algtype; 506 unsigned int keylen; 507 unsigned int keylen_pad; 508 dma_addr_t key_dma; 509 const void *key_virt; 510 bool key_inline; 511 }; 512 513 /** 514 * desc_inline_query() - Provide indications on which data items can be inlined 515 * and which shall be referenced in a shared descriptor. 516 * @sd_base_len: Shared descriptor base length - bytes consumed by the commands, 517 * excluding the data items to be inlined (or corresponding 518 * pointer if an item is not inlined). Each cnstr_* function that 519 * generates descriptors should have a define mentioning 520 * corresponding length. 521 * @jd_len: Maximum length of the job descriptor(s) that will be used 522 * together with the shared descriptor. 523 * @data_len: Array of lengths of the data items trying to be inlined 524 * @inl_mask: 32bit mask with bit x = 1 if data item x can be inlined, 0 525 * otherwise. 526 * @count: Number of data items (size of @data_len array); must be <= 32 527 * 528 * Return: 0 if data can be inlined / referenced, negative value if not. If 0, 529 * check @inl_mask for details. 530 */ 531 static inline int desc_inline_query(unsigned int sd_base_len, 532 unsigned int jd_len, unsigned int *data_len, 533 u32 *inl_mask, unsigned int count) 534 { 535 int rem_bytes = (int)(CAAM_DESC_BYTES_MAX - sd_base_len - jd_len); 536 unsigned int i; 537 538 *inl_mask = 0; 539 for (i = 0; (i < count) && (rem_bytes > 0); i++) { 540 if (rem_bytes - (int)(data_len[i] + 541 (count - i - 1) * CAAM_PTR_SZ) >= 0) { 542 rem_bytes -= data_len[i]; 543 *inl_mask |= (1 << i); 544 } else { 545 rem_bytes -= CAAM_PTR_SZ; 546 } 547 } 548 549 return (rem_bytes >= 0) ? 0 : -1; 550 } 551 552 /** 553 * append_proto_dkp - Derived Key Protocol (DKP): key -> split key 554 * @desc: pointer to buffer used for descriptor construction 555 * @adata: pointer to authentication transform definitions. 556 * keylen should be the length of initial key, while keylen_pad 557 * the length of the derived (split) key. 558 * Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1, SHA224, 559 * SHA256, SHA384, SHA512}. 560 */ 561 static inline void append_proto_dkp(u32 * const desc, struct alginfo *adata) 562 { 563 u32 protid; 564 565 /* 566 * Quick & dirty translation from OP_ALG_ALGSEL_{MD5, SHA*} 567 * to OP_PCLID_DKP_{MD5, SHA*} 568 */ 569 protid = (adata->algtype & OP_ALG_ALGSEL_SUBMASK) | 570 (0x20 << OP_ALG_ALGSEL_SHIFT); 571 572 if (adata->key_inline) { 573 int words; 574 575 if (adata->keylen > adata->keylen_pad) { 576 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid | 577 OP_PCL_DKP_SRC_PTR | 578 OP_PCL_DKP_DST_IMM | adata->keylen); 579 append_ptr(desc, adata->key_dma); 580 581 words = (ALIGN(adata->keylen_pad, CAAM_CMD_SZ) - 582 CAAM_PTR_SZ) / CAAM_CMD_SZ; 583 } else { 584 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid | 585 OP_PCL_DKP_SRC_IMM | 586 OP_PCL_DKP_DST_IMM | adata->keylen); 587 append_data(desc, adata->key_virt, adata->keylen); 588 589 words = (ALIGN(adata->keylen_pad, CAAM_CMD_SZ) - 590 ALIGN(adata->keylen, CAAM_CMD_SZ)) / 591 CAAM_CMD_SZ; 592 } 593 594 /* Reserve space in descriptor buffer for the derived key */ 595 if (words) 596 (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + words); 597 } else { 598 append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid | 599 OP_PCL_DKP_SRC_PTR | OP_PCL_DKP_DST_PTR | 600 adata->keylen); 601 append_ptr(desc, adata->key_dma); 602 } 603 } 604 605 #endif /* DESC_CONSTR_H */ 606