1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __MARVELL_CESA_H__ 3 #define __MARVELL_CESA_H__ 4 5 #include <crypto/internal/hash.h> 6 #include <crypto/internal/skcipher.h> 7 8 #include <linux/dma-direction.h> 9 #include <linux/dmapool.h> 10 11 #define CESA_ENGINE_OFF(i) (((i) * 0x2000)) 12 13 #define CESA_TDMA_BYTE_CNT 0x800 14 #define CESA_TDMA_SRC_ADDR 0x810 15 #define CESA_TDMA_DST_ADDR 0x820 16 #define CESA_TDMA_NEXT_ADDR 0x830 17 18 #define CESA_TDMA_CONTROL 0x840 19 #define CESA_TDMA_DST_BURST GENMASK(2, 0) 20 #define CESA_TDMA_DST_BURST_32B 3 21 #define CESA_TDMA_DST_BURST_128B 4 22 #define CESA_TDMA_OUT_RD_EN BIT(4) 23 #define CESA_TDMA_SRC_BURST GENMASK(8, 6) 24 #define CESA_TDMA_SRC_BURST_32B (3 << 6) 25 #define CESA_TDMA_SRC_BURST_128B (4 << 6) 26 #define CESA_TDMA_CHAIN BIT(9) 27 #define CESA_TDMA_BYTE_SWAP BIT(11) 28 #define CESA_TDMA_NO_BYTE_SWAP BIT(11) 29 #define CESA_TDMA_EN BIT(12) 30 #define CESA_TDMA_FETCH_ND BIT(13) 31 #define CESA_TDMA_ACT BIT(14) 32 33 #define CESA_TDMA_CUR 0x870 34 #define CESA_TDMA_ERROR_CAUSE 0x8c8 35 #define CESA_TDMA_ERROR_MSK 0x8cc 36 37 #define CESA_TDMA_WINDOW_BASE(x) (((x) * 0x8) + 0xa00) 38 #define CESA_TDMA_WINDOW_CTRL(x) (((x) * 0x8) + 0xa04) 39 40 #define CESA_IVDIG(x) (0xdd00 + ((x) * 4) + \ 41 (((x) < 5) ? 0 : 0x14)) 42 43 #define CESA_SA_CMD 0xde00 44 #define CESA_SA_CMD_EN_CESA_SA_ACCL0 BIT(0) 45 #define CESA_SA_CMD_EN_CESA_SA_ACCL1 BIT(1) 46 #define CESA_SA_CMD_DISABLE_SEC BIT(2) 47 48 #define CESA_SA_DESC_P0 0xde04 49 50 #define CESA_SA_DESC_P1 0xde14 51 52 #define CESA_SA_CFG 0xde08 53 #define CESA_SA_CFG_STOP_DIG_ERR GENMASK(1, 0) 54 #define CESA_SA_CFG_DIG_ERR_CONT 0 55 #define CESA_SA_CFG_DIG_ERR_SKIP 1 56 #define CESA_SA_CFG_DIG_ERR_STOP 3 57 #define CESA_SA_CFG_CH0_W_IDMA BIT(7) 58 #define CESA_SA_CFG_CH1_W_IDMA BIT(8) 59 #define CESA_SA_CFG_ACT_CH0_IDMA BIT(9) 60 #define CESA_SA_CFG_ACT_CH1_IDMA BIT(10) 61 #define CESA_SA_CFG_MULTI_PKT BIT(11) 62 #define CESA_SA_CFG_PARA_DIS BIT(13) 63 64 #define CESA_SA_ACCEL_STATUS 0xde0c 65 #define CESA_SA_ST_ACT_0 BIT(0) 66 #define CESA_SA_ST_ACT_1 BIT(1) 67 68 /* 69 * CESA_SA_FPGA_INT_STATUS looks like an FPGA leftover and is documented only 70 * in Errata 4.12. It looks like that it was part of an IRQ-controller in FPGA 71 * and someone forgot to remove it while switching to the core and moving to 72 * CESA_SA_INT_STATUS. 73 */ 74 #define CESA_SA_FPGA_INT_STATUS 0xdd68 75 #define CESA_SA_INT_STATUS 0xde20 76 #define CESA_SA_INT_AUTH_DONE BIT(0) 77 #define CESA_SA_INT_DES_E_DONE BIT(1) 78 #define CESA_SA_INT_AES_E_DONE BIT(2) 79 #define CESA_SA_INT_AES_D_DONE BIT(3) 80 #define CESA_SA_INT_ENC_DONE BIT(4) 81 #define CESA_SA_INT_ACCEL0_DONE BIT(5) 82 #define CESA_SA_INT_ACCEL1_DONE BIT(6) 83 #define CESA_SA_INT_ACC0_IDMA_DONE BIT(7) 84 #define CESA_SA_INT_ACC1_IDMA_DONE BIT(8) 85 #define CESA_SA_INT_IDMA_DONE BIT(9) 86 #define CESA_SA_INT_IDMA_OWN_ERR BIT(10) 87 88 #define CESA_SA_INT_MSK 0xde24 89 90 #define CESA_SA_DESC_CFG_OP_MAC_ONLY 0 91 #define CESA_SA_DESC_CFG_OP_CRYPT_ONLY 1 92 #define CESA_SA_DESC_CFG_OP_MAC_CRYPT 2 93 #define CESA_SA_DESC_CFG_OP_CRYPT_MAC 3 94 #define CESA_SA_DESC_CFG_OP_MSK GENMASK(1, 0) 95 #define CESA_SA_DESC_CFG_MACM_SHA256 (1 << 4) 96 #define CESA_SA_DESC_CFG_MACM_HMAC_SHA256 (3 << 4) 97 #define CESA_SA_DESC_CFG_MACM_MD5 (4 << 4) 98 #define CESA_SA_DESC_CFG_MACM_SHA1 (5 << 4) 99 #define CESA_SA_DESC_CFG_MACM_HMAC_MD5 (6 << 4) 100 #define CESA_SA_DESC_CFG_MACM_HMAC_SHA1 (7 << 4) 101 #define CESA_SA_DESC_CFG_MACM_MSK GENMASK(6, 4) 102 #define CESA_SA_DESC_CFG_CRYPTM_DES (1 << 8) 103 #define CESA_SA_DESC_CFG_CRYPTM_3DES (2 << 8) 104 #define CESA_SA_DESC_CFG_CRYPTM_AES (3 << 8) 105 #define CESA_SA_DESC_CFG_CRYPTM_MSK GENMASK(9, 8) 106 #define CESA_SA_DESC_CFG_DIR_ENC (0 << 12) 107 #define CESA_SA_DESC_CFG_DIR_DEC (1 << 12) 108 #define CESA_SA_DESC_CFG_CRYPTCM_ECB (0 << 16) 109 #define CESA_SA_DESC_CFG_CRYPTCM_CBC (1 << 16) 110 #define CESA_SA_DESC_CFG_CRYPTCM_MSK BIT(16) 111 #define CESA_SA_DESC_CFG_3DES_EEE (0 << 20) 112 #define CESA_SA_DESC_CFG_3DES_EDE (1 << 20) 113 #define CESA_SA_DESC_CFG_AES_LEN_128 (0 << 24) 114 #define CESA_SA_DESC_CFG_AES_LEN_192 (1 << 24) 115 #define CESA_SA_DESC_CFG_AES_LEN_256 (2 << 24) 116 #define CESA_SA_DESC_CFG_AES_LEN_MSK GENMASK(25, 24) 117 #define CESA_SA_DESC_CFG_NOT_FRAG (0 << 30) 118 #define CESA_SA_DESC_CFG_FIRST_FRAG (1 << 30) 119 #define CESA_SA_DESC_CFG_LAST_FRAG (2 << 30) 120 #define CESA_SA_DESC_CFG_MID_FRAG (3 << 30) 121 #define CESA_SA_DESC_CFG_FRAG_MSK GENMASK(31, 30) 122 123 /* 124 * /-----------\ 0 125 * | ACCEL CFG | 4 * 8 126 * |-----------| 0x20 127 * | CRYPT KEY | 8 * 4 128 * |-----------| 0x40 129 * | IV IN | 4 * 4 130 * |-----------| 0x40 (inplace) 131 * | IV BUF | 4 * 4 132 * |-----------| 0x80 133 * | DATA IN | 16 * x (max ->max_req_size) 134 * |-----------| 0x80 (inplace operation) 135 * | DATA OUT | 16 * x (max ->max_req_size) 136 * \-----------/ SRAM size 137 */ 138 139 /* 140 * Hashing memory map: 141 * /-----------\ 0 142 * | ACCEL CFG | 4 * 8 143 * |-----------| 0x20 144 * | Inner IV | 8 * 4 145 * |-----------| 0x40 146 * | Outer IV | 8 * 4 147 * |-----------| 0x60 148 * | Output BUF| 8 * 4 149 * |-----------| 0x80 150 * | DATA IN | 64 * x (max ->max_req_size) 151 * \-----------/ SRAM size 152 */ 153 154 #define CESA_SA_CFG_SRAM_OFFSET 0x00 155 #define CESA_SA_DATA_SRAM_OFFSET 0x80 156 157 #define CESA_SA_CRYPT_KEY_SRAM_OFFSET 0x20 158 #define CESA_SA_CRYPT_IV_SRAM_OFFSET 0x40 159 160 #define CESA_SA_MAC_IIV_SRAM_OFFSET 0x20 161 #define CESA_SA_MAC_OIV_SRAM_OFFSET 0x40 162 #define CESA_SA_MAC_DIG_SRAM_OFFSET 0x60 163 164 #define CESA_SA_DESC_CRYPT_DATA(offset) \ 165 cpu_to_le32((CESA_SA_DATA_SRAM_OFFSET + (offset)) | \ 166 ((CESA_SA_DATA_SRAM_OFFSET + (offset)) << 16)) 167 168 #define CESA_SA_DESC_CRYPT_IV(offset) \ 169 cpu_to_le32((CESA_SA_CRYPT_IV_SRAM_OFFSET + (offset)) | \ 170 ((CESA_SA_CRYPT_IV_SRAM_OFFSET + (offset)) << 16)) 171 172 #define CESA_SA_DESC_CRYPT_KEY(offset) \ 173 cpu_to_le32(CESA_SA_CRYPT_KEY_SRAM_OFFSET + (offset)) 174 175 #define CESA_SA_DESC_MAC_DATA(offset) \ 176 cpu_to_le32(CESA_SA_DATA_SRAM_OFFSET + (offset)) 177 #define CESA_SA_DESC_MAC_DATA_MSK cpu_to_le32(GENMASK(15, 0)) 178 179 #define CESA_SA_DESC_MAC_TOTAL_LEN(total_len) cpu_to_le32((total_len) << 16) 180 #define CESA_SA_DESC_MAC_TOTAL_LEN_MSK cpu_to_le32(GENMASK(31, 16)) 181 182 #define CESA_SA_DESC_MAC_SRC_TOTAL_LEN_MAX 0xffff 183 184 #define CESA_SA_DESC_MAC_DIGEST(offset) \ 185 cpu_to_le32(CESA_SA_MAC_DIG_SRAM_OFFSET + (offset)) 186 #define CESA_SA_DESC_MAC_DIGEST_MSK cpu_to_le32(GENMASK(15, 0)) 187 188 #define CESA_SA_DESC_MAC_FRAG_LEN(frag_len) cpu_to_le32((frag_len) << 16) 189 #define CESA_SA_DESC_MAC_FRAG_LEN_MSK cpu_to_le32(GENMASK(31, 16)) 190 191 #define CESA_SA_DESC_MAC_IV(offset) \ 192 cpu_to_le32((CESA_SA_MAC_IIV_SRAM_OFFSET + (offset)) | \ 193 ((CESA_SA_MAC_OIV_SRAM_OFFSET + (offset)) << 16)) 194 195 #define CESA_SA_SRAM_SIZE 2048 196 #define CESA_SA_SRAM_PAYLOAD_SIZE (cesa_dev->sram_size - \ 197 CESA_SA_DATA_SRAM_OFFSET) 198 199 #define CESA_SA_DEFAULT_SRAM_SIZE 2048 200 #define CESA_SA_MIN_SRAM_SIZE 1024 201 202 #define CESA_SA_SRAM_MSK (2048 - 1) 203 204 #define CESA_MAX_HASH_BLOCK_SIZE 64 205 #define CESA_HASH_BLOCK_SIZE_MSK (CESA_MAX_HASH_BLOCK_SIZE - 1) 206 207 /** 208 * struct mv_cesa_sec_accel_desc - security accelerator descriptor 209 * @config: engine config 210 * @enc_p: input and output data pointers for a cipher operation 211 * @enc_len: cipher operation length 212 * @enc_key_p: cipher key pointer 213 * @enc_iv: cipher IV pointers 214 * @mac_src_p: input pointer and total hash length 215 * @mac_digest: digest pointer and hash operation length 216 * @mac_iv: hmac IV pointers 217 * 218 * Structure passed to the CESA engine to describe the crypto operation 219 * to be executed. 220 */ 221 struct mv_cesa_sec_accel_desc { 222 __le32 config; 223 __le32 enc_p; 224 __le32 enc_len; 225 __le32 enc_key_p; 226 __le32 enc_iv; 227 __le32 mac_src_p; 228 __le32 mac_digest; 229 __le32 mac_iv; 230 }; 231 232 /** 233 * struct mv_cesa_skcipher_op_ctx - cipher operation context 234 * @key: cipher key 235 * @iv: cipher IV 236 * 237 * Context associated to a cipher operation. 238 */ 239 struct mv_cesa_skcipher_op_ctx { 240 __le32 key[8]; 241 u32 iv[4]; 242 }; 243 244 /** 245 * struct mv_cesa_hash_op_ctx - hash or hmac operation context 246 * @key: cipher key 247 * @iv: cipher IV 248 * 249 * Context associated to an hash or hmac operation. 250 */ 251 struct mv_cesa_hash_op_ctx { 252 u32 iv[16]; 253 __le32 hash[8]; 254 }; 255 256 /** 257 * struct mv_cesa_op_ctx - crypto operation context 258 * @desc: CESA descriptor 259 * @ctx: context associated to the crypto operation 260 * 261 * Context associated to a crypto operation. 262 */ 263 struct mv_cesa_op_ctx { 264 struct mv_cesa_sec_accel_desc desc; 265 union { 266 struct mv_cesa_skcipher_op_ctx skcipher; 267 struct mv_cesa_hash_op_ctx hash; 268 } ctx; 269 }; 270 271 /* TDMA descriptor flags */ 272 #define CESA_TDMA_DST_IN_SRAM BIT(31) 273 #define CESA_TDMA_SRC_IN_SRAM BIT(30) 274 #define CESA_TDMA_END_OF_REQ BIT(29) 275 #define CESA_TDMA_BREAK_CHAIN BIT(28) 276 #define CESA_TDMA_SET_STATE BIT(27) 277 #define CESA_TDMA_TYPE_MSK GENMASK(26, 0) 278 #define CESA_TDMA_DUMMY 0 279 #define CESA_TDMA_DATA 1 280 #define CESA_TDMA_OP 2 281 #define CESA_TDMA_RESULT 3 282 283 /** 284 * struct mv_cesa_tdma_desc - TDMA descriptor 285 * @byte_cnt: number of bytes to transfer 286 * @src: DMA address of the source 287 * @dst: DMA address of the destination 288 * @next_dma: DMA address of the next TDMA descriptor 289 * @cur_dma: DMA address of this TDMA descriptor 290 * @next: pointer to the next TDMA descriptor 291 * @op: CESA operation attached to this TDMA descriptor 292 * @data: raw data attached to this TDMA descriptor 293 * @flags: flags describing the TDMA transfer. See the 294 * "TDMA descriptor flags" section above 295 * 296 * TDMA descriptor used to create a transfer chain describing a crypto 297 * operation. 298 */ 299 struct mv_cesa_tdma_desc { 300 __le32 byte_cnt; 301 union { 302 __le32 src; 303 u32 src_dma; 304 }; 305 union { 306 __le32 dst; 307 u32 dst_dma; 308 }; 309 __le32 next_dma; 310 311 /* Software state */ 312 dma_addr_t cur_dma; 313 struct mv_cesa_tdma_desc *next; 314 union { 315 struct mv_cesa_op_ctx *op; 316 void *data; 317 }; 318 u32 flags; 319 }; 320 321 /** 322 * struct mv_cesa_sg_dma_iter - scatter-gather iterator 323 * @dir: transfer direction 324 * @sg: scatter list 325 * @offset: current position in the scatter list 326 * @op_offset: current position in the crypto operation 327 * 328 * Iterator used to iterate over a scatterlist while creating a TDMA chain for 329 * a crypto operation. 330 */ 331 struct mv_cesa_sg_dma_iter { 332 enum dma_data_direction dir; 333 struct scatterlist *sg; 334 unsigned int offset; 335 unsigned int op_offset; 336 }; 337 338 /** 339 * struct mv_cesa_dma_iter - crypto operation iterator 340 * @len: the crypto operation length 341 * @offset: current position in the crypto operation 342 * @op_len: sub-operation length (the crypto engine can only act on 2kb 343 * chunks) 344 * 345 * Iterator used to create a TDMA chain for a given crypto operation. 346 */ 347 struct mv_cesa_dma_iter { 348 unsigned int len; 349 unsigned int offset; 350 unsigned int op_len; 351 }; 352 353 /** 354 * struct mv_cesa_tdma_chain - TDMA chain 355 * @first: first entry in the TDMA chain 356 * @last: last entry in the TDMA chain 357 * 358 * Stores a TDMA chain for a specific crypto operation. 359 */ 360 struct mv_cesa_tdma_chain { 361 struct mv_cesa_tdma_desc *first; 362 struct mv_cesa_tdma_desc *last; 363 }; 364 365 struct mv_cesa_engine; 366 367 /** 368 * struct mv_cesa_caps - CESA device capabilities 369 * @engines: number of engines 370 * @has_tdma: whether this device has a TDMA block 371 * @cipher_algs: supported cipher algorithms 372 * @ncipher_algs: number of supported cipher algorithms 373 * @ahash_algs: supported hash algorithms 374 * @nahash_algs: number of supported hash algorithms 375 * 376 * Structure used to describe CESA device capabilities. 377 */ 378 struct mv_cesa_caps { 379 int nengines; 380 bool has_tdma; 381 struct skcipher_alg **cipher_algs; 382 int ncipher_algs; 383 struct ahash_alg **ahash_algs; 384 int nahash_algs; 385 }; 386 387 /** 388 * struct mv_cesa_dev_dma - DMA pools 389 * @tdma_desc_pool: TDMA desc pool 390 * @op_pool: crypto operation pool 391 * @cache_pool: data cache pool (used by hash implementation when the 392 * hash request is smaller than the hash block size) 393 * @padding_pool: padding pool (used by hash implementation when hardware 394 * padding cannot be used) 395 * 396 * Structure containing the different DMA pools used by this driver. 397 */ 398 struct mv_cesa_dev_dma { 399 struct dma_pool *tdma_desc_pool; 400 struct dma_pool *op_pool; 401 struct dma_pool *cache_pool; 402 struct dma_pool *padding_pool; 403 }; 404 405 /** 406 * struct mv_cesa_dev - CESA device 407 * @caps: device capabilities 408 * @regs: device registers 409 * @sram_size: usable SRAM size 410 * @lock: device lock 411 * @engines: array of engines 412 * @dma: dma pools 413 * 414 * Structure storing CESA device information. 415 */ 416 struct mv_cesa_dev { 417 const struct mv_cesa_caps *caps; 418 void __iomem *regs; 419 struct device *dev; 420 unsigned int sram_size; 421 spinlock_t lock; 422 struct mv_cesa_engine *engines; 423 struct mv_cesa_dev_dma *dma; 424 }; 425 426 /** 427 * struct mv_cesa_engine - CESA engine 428 * @id: engine id 429 * @regs: engine registers 430 * @sram: SRAM memory region 431 * @sram_pool: SRAM memory region from pool 432 * @sram_dma: DMA address of the SRAM memory region 433 * @lock: engine lock 434 * @req: current crypto request 435 * @clk: engine clk 436 * @zclk: engine zclk 437 * @max_req_len: maximum chunk length (useful to create the TDMA chain) 438 * @int_mask: interrupt mask cache 439 * @pool: memory pool pointing to the memory region reserved in 440 * SRAM 441 * @queue: fifo of the pending crypto requests 442 * @load: engine load counter, useful for load balancing 443 * @chain: list of the current tdma descriptors being processed 444 * by this engine. 445 * @complete_queue: fifo of the processed requests by the engine 446 * 447 * Structure storing CESA engine information. 448 */ 449 struct mv_cesa_engine { 450 int id; 451 void __iomem *regs; 452 union { 453 void __iomem *sram; 454 void *sram_pool; 455 }; 456 dma_addr_t sram_dma; 457 spinlock_t lock; 458 struct crypto_async_request *req; 459 struct clk *clk; 460 struct clk *zclk; 461 size_t max_req_len; 462 u32 int_mask; 463 struct gen_pool *pool; 464 struct crypto_queue queue; 465 atomic_t load; 466 struct mv_cesa_tdma_chain chain; 467 struct list_head complete_queue; 468 int irq; 469 }; 470 471 /** 472 * struct mv_cesa_req_ops - CESA request operations 473 * @process: process a request chunk result (should return 0 if the 474 * operation, -EINPROGRESS if it needs more steps or an error 475 * code) 476 * @step: launch the crypto operation on the next chunk 477 * @cleanup: cleanup the crypto request (release associated data) 478 * @complete: complete the request, i.e copy result or context from sram when 479 * needed. 480 */ 481 struct mv_cesa_req_ops { 482 int (*process)(struct crypto_async_request *req, u32 status); 483 void (*step)(struct crypto_async_request *req); 484 void (*cleanup)(struct crypto_async_request *req); 485 void (*complete)(struct crypto_async_request *req); 486 }; 487 488 /** 489 * struct mv_cesa_ctx - CESA operation context 490 * @ops: crypto operations 491 * 492 * Base context structure inherited by operation specific ones. 493 */ 494 struct mv_cesa_ctx { 495 const struct mv_cesa_req_ops *ops; 496 }; 497 498 /** 499 * struct mv_cesa_hash_ctx - CESA hash operation context 500 * @base: base context structure 501 * 502 * Hash context structure. 503 */ 504 struct mv_cesa_hash_ctx { 505 struct mv_cesa_ctx base; 506 }; 507 508 /** 509 * struct mv_cesa_hash_ctx - CESA hmac operation context 510 * @base: base context structure 511 * @iv: initialization vectors 512 * 513 * HMAC context structure. 514 */ 515 struct mv_cesa_hmac_ctx { 516 struct mv_cesa_ctx base; 517 __be32 iv[16]; 518 }; 519 520 /** 521 * enum mv_cesa_req_type - request type definitions 522 * @CESA_STD_REQ: standard request 523 * @CESA_DMA_REQ: DMA request 524 */ 525 enum mv_cesa_req_type { 526 CESA_STD_REQ, 527 CESA_DMA_REQ, 528 }; 529 530 /** 531 * struct mv_cesa_req - CESA request 532 * @engine: engine associated with this request 533 * @chain: list of tdma descriptors associated with this request 534 */ 535 struct mv_cesa_req { 536 struct mv_cesa_engine *engine; 537 struct mv_cesa_tdma_chain chain; 538 }; 539 540 /** 541 * struct mv_cesa_sg_std_iter - CESA scatter-gather iterator for standard 542 * requests 543 * @iter: sg mapping iterator 544 * @offset: current offset in the SG entry mapped in memory 545 */ 546 struct mv_cesa_sg_std_iter { 547 struct sg_mapping_iter iter; 548 unsigned int offset; 549 }; 550 551 /** 552 * struct mv_cesa_skcipher_std_req - cipher standard request 553 * @op: operation context 554 * @offset: current operation offset 555 * @size: size of the crypto operation 556 */ 557 struct mv_cesa_skcipher_std_req { 558 struct mv_cesa_op_ctx op; 559 unsigned int offset; 560 unsigned int size; 561 bool skip_ctx; 562 }; 563 564 /** 565 * struct mv_cesa_skcipher_req - cipher request 566 * @req: type specific request information 567 * @src_nents: number of entries in the src sg list 568 * @dst_nents: number of entries in the dest sg list 569 */ 570 struct mv_cesa_skcipher_req { 571 struct mv_cesa_req base; 572 struct mv_cesa_skcipher_std_req std; 573 int src_nents; 574 int dst_nents; 575 }; 576 577 /** 578 * struct mv_cesa_ahash_std_req - standard hash request 579 * @offset: current operation offset 580 */ 581 struct mv_cesa_ahash_std_req { 582 unsigned int offset; 583 }; 584 585 /** 586 * struct mv_cesa_ahash_dma_req - DMA hash request 587 * @padding: padding buffer 588 * @padding_dma: DMA address of the padding buffer 589 * @cache_dma: DMA address of the cache buffer 590 */ 591 struct mv_cesa_ahash_dma_req { 592 u8 *padding; 593 dma_addr_t padding_dma; 594 u8 *cache; 595 dma_addr_t cache_dma; 596 }; 597 598 /** 599 * struct mv_cesa_ahash_req - hash request 600 * @req: type specific request information 601 * @cache: cache buffer 602 * @cache_ptr: write pointer in the cache buffer 603 * @len: hash total length 604 * @src_nents: number of entries in the scatterlist 605 * @last_req: define whether the current operation is the last one 606 * or not 607 * @state: hash state 608 */ 609 struct mv_cesa_ahash_req { 610 struct mv_cesa_req base; 611 union { 612 struct mv_cesa_ahash_dma_req dma; 613 struct mv_cesa_ahash_std_req std; 614 } req; 615 struct mv_cesa_op_ctx op_tmpl; 616 u8 cache[CESA_MAX_HASH_BLOCK_SIZE]; 617 unsigned int cache_ptr; 618 u64 len; 619 int src_nents; 620 bool last_req; 621 bool algo_le; 622 u32 state[8]; 623 }; 624 625 /* CESA functions */ 626 627 extern struct mv_cesa_dev *cesa_dev; 628 629 630 static inline void 631 mv_cesa_engine_enqueue_complete_request(struct mv_cesa_engine *engine, 632 struct crypto_async_request *req) 633 { 634 list_add_tail(&req->list, &engine->complete_queue); 635 } 636 637 static inline struct crypto_async_request * 638 mv_cesa_engine_dequeue_complete_request(struct mv_cesa_engine *engine) 639 { 640 struct crypto_async_request *req; 641 642 req = list_first_entry_or_null(&engine->complete_queue, 643 struct crypto_async_request, 644 list); 645 if (req) 646 list_del(&req->list); 647 648 return req; 649 } 650 651 652 static inline enum mv_cesa_req_type 653 mv_cesa_req_get_type(struct mv_cesa_req *req) 654 { 655 return req->chain.first ? CESA_DMA_REQ : CESA_STD_REQ; 656 } 657 658 static inline void mv_cesa_update_op_cfg(struct mv_cesa_op_ctx *op, 659 u32 cfg, u32 mask) 660 { 661 op->desc.config &= cpu_to_le32(~mask); 662 op->desc.config |= cpu_to_le32(cfg); 663 } 664 665 static inline u32 mv_cesa_get_op_cfg(const struct mv_cesa_op_ctx *op) 666 { 667 return le32_to_cpu(op->desc.config); 668 } 669 670 static inline void mv_cesa_set_op_cfg(struct mv_cesa_op_ctx *op, u32 cfg) 671 { 672 op->desc.config = cpu_to_le32(cfg); 673 } 674 675 static inline void mv_cesa_adjust_op(struct mv_cesa_engine *engine, 676 struct mv_cesa_op_ctx *op) 677 { 678 u32 offset = engine->sram_dma & CESA_SA_SRAM_MSK; 679 680 op->desc.enc_p = CESA_SA_DESC_CRYPT_DATA(offset); 681 op->desc.enc_key_p = CESA_SA_DESC_CRYPT_KEY(offset); 682 op->desc.enc_iv = CESA_SA_DESC_CRYPT_IV(offset); 683 op->desc.mac_src_p &= ~CESA_SA_DESC_MAC_DATA_MSK; 684 op->desc.mac_src_p |= CESA_SA_DESC_MAC_DATA(offset); 685 op->desc.mac_digest &= ~CESA_SA_DESC_MAC_DIGEST_MSK; 686 op->desc.mac_digest |= CESA_SA_DESC_MAC_DIGEST(offset); 687 op->desc.mac_iv = CESA_SA_DESC_MAC_IV(offset); 688 } 689 690 static inline void mv_cesa_set_crypt_op_len(struct mv_cesa_op_ctx *op, int len) 691 { 692 op->desc.enc_len = cpu_to_le32(len); 693 } 694 695 static inline void mv_cesa_set_mac_op_total_len(struct mv_cesa_op_ctx *op, 696 int len) 697 { 698 op->desc.mac_src_p &= ~CESA_SA_DESC_MAC_TOTAL_LEN_MSK; 699 op->desc.mac_src_p |= CESA_SA_DESC_MAC_TOTAL_LEN(len); 700 } 701 702 static inline void mv_cesa_set_mac_op_frag_len(struct mv_cesa_op_ctx *op, 703 int len) 704 { 705 op->desc.mac_digest &= ~CESA_SA_DESC_MAC_FRAG_LEN_MSK; 706 op->desc.mac_digest |= CESA_SA_DESC_MAC_FRAG_LEN(len); 707 } 708 709 static inline void mv_cesa_set_int_mask(struct mv_cesa_engine *engine, 710 u32 int_mask) 711 { 712 if (int_mask == engine->int_mask) 713 return; 714 715 writel_relaxed(int_mask, engine->regs + CESA_SA_INT_MSK); 716 engine->int_mask = int_mask; 717 } 718 719 static inline u32 mv_cesa_get_int_mask(struct mv_cesa_engine *engine) 720 { 721 return engine->int_mask; 722 } 723 724 static inline bool mv_cesa_mac_op_is_first_frag(const struct mv_cesa_op_ctx *op) 725 { 726 return (mv_cesa_get_op_cfg(op) & CESA_SA_DESC_CFG_FRAG_MSK) == 727 CESA_SA_DESC_CFG_FIRST_FRAG; 728 } 729 730 int mv_cesa_queue_req(struct crypto_async_request *req, 731 struct mv_cesa_req *creq); 732 733 struct crypto_async_request * 734 mv_cesa_dequeue_req_locked(struct mv_cesa_engine *engine, 735 struct crypto_async_request **backlog); 736 737 static inline struct mv_cesa_engine *mv_cesa_select_engine(int weight) 738 { 739 int i; 740 u32 min_load = U32_MAX; 741 struct mv_cesa_engine *selected = NULL; 742 743 for (i = 0; i < cesa_dev->caps->nengines; i++) { 744 struct mv_cesa_engine *engine = cesa_dev->engines + i; 745 u32 load = atomic_read(&engine->load); 746 747 if (load < min_load) { 748 min_load = load; 749 selected = engine; 750 } 751 } 752 753 atomic_add(weight, &selected->load); 754 755 return selected; 756 } 757 758 /* 759 * Helper function that indicates whether a crypto request needs to be 760 * cleaned up or not after being enqueued using mv_cesa_queue_req(). 761 */ 762 static inline int mv_cesa_req_needs_cleanup(struct crypto_async_request *req, 763 int ret) 764 { 765 /* 766 * The queue still had some space, the request was queued 767 * normally, so there's no need to clean it up. 768 */ 769 if (ret == -EINPROGRESS) 770 return false; 771 772 /* 773 * The queue had not space left, but since the request is 774 * flagged with CRYPTO_TFM_REQ_MAY_BACKLOG, it was added to 775 * the backlog and will be processed later. There's no need to 776 * clean it up. 777 */ 778 if (ret == -EBUSY) 779 return false; 780 781 /* Request wasn't queued, we need to clean it up */ 782 return true; 783 } 784 785 /* TDMA functions */ 786 787 static inline void mv_cesa_req_dma_iter_init(struct mv_cesa_dma_iter *iter, 788 unsigned int len) 789 { 790 iter->len = len; 791 iter->op_len = min(len, CESA_SA_SRAM_PAYLOAD_SIZE); 792 iter->offset = 0; 793 } 794 795 static inline void mv_cesa_sg_dma_iter_init(struct mv_cesa_sg_dma_iter *iter, 796 struct scatterlist *sg, 797 enum dma_data_direction dir) 798 { 799 iter->op_offset = 0; 800 iter->offset = 0; 801 iter->sg = sg; 802 iter->dir = dir; 803 } 804 805 static inline unsigned int 806 mv_cesa_req_dma_iter_transfer_len(struct mv_cesa_dma_iter *iter, 807 struct mv_cesa_sg_dma_iter *sgiter) 808 { 809 return min(iter->op_len - sgiter->op_offset, 810 sg_dma_len(sgiter->sg) - sgiter->offset); 811 } 812 813 bool mv_cesa_req_dma_iter_next_transfer(struct mv_cesa_dma_iter *chain, 814 struct mv_cesa_sg_dma_iter *sgiter, 815 unsigned int len); 816 817 static inline bool mv_cesa_req_dma_iter_next_op(struct mv_cesa_dma_iter *iter) 818 { 819 iter->offset += iter->op_len; 820 iter->op_len = min(iter->len - iter->offset, 821 CESA_SA_SRAM_PAYLOAD_SIZE); 822 823 return iter->op_len; 824 } 825 826 void mv_cesa_dma_step(struct mv_cesa_req *dreq); 827 828 static inline int mv_cesa_dma_process(struct mv_cesa_req *dreq, 829 u32 status) 830 { 831 if (!(status & CESA_SA_INT_ACC0_IDMA_DONE)) 832 return -EINPROGRESS; 833 834 if (status & CESA_SA_INT_IDMA_OWN_ERR) 835 return -EINVAL; 836 837 return 0; 838 } 839 840 void mv_cesa_dma_prepare(struct mv_cesa_req *dreq, 841 struct mv_cesa_engine *engine); 842 void mv_cesa_dma_cleanup(struct mv_cesa_req *dreq); 843 void mv_cesa_tdma_chain(struct mv_cesa_engine *engine, 844 struct mv_cesa_req *dreq); 845 int mv_cesa_tdma_process(struct mv_cesa_engine *engine, u32 status); 846 847 848 static inline void 849 mv_cesa_tdma_desc_iter_init(struct mv_cesa_tdma_chain *chain) 850 { 851 memset(chain, 0, sizeof(*chain)); 852 } 853 854 int mv_cesa_dma_add_result_op(struct mv_cesa_tdma_chain *chain, dma_addr_t src, 855 u32 size, u32 flags, gfp_t gfp_flags); 856 857 struct mv_cesa_op_ctx *mv_cesa_dma_add_op(struct mv_cesa_tdma_chain *chain, 858 const struct mv_cesa_op_ctx *op_templ, 859 bool skip_ctx, 860 gfp_t flags); 861 862 int mv_cesa_dma_add_data_transfer(struct mv_cesa_tdma_chain *chain, 863 dma_addr_t dst, dma_addr_t src, u32 size, 864 u32 flags, gfp_t gfp_flags); 865 866 int mv_cesa_dma_add_dummy_launch(struct mv_cesa_tdma_chain *chain, gfp_t flags); 867 int mv_cesa_dma_add_dummy_end(struct mv_cesa_tdma_chain *chain, gfp_t flags); 868 869 int mv_cesa_dma_add_op_transfers(struct mv_cesa_tdma_chain *chain, 870 struct mv_cesa_dma_iter *dma_iter, 871 struct mv_cesa_sg_dma_iter *sgiter, 872 gfp_t gfp_flags); 873 874 size_t mv_cesa_sg_copy(struct mv_cesa_engine *engine, 875 struct scatterlist *sgl, unsigned int nents, 876 unsigned int sram_off, size_t buflen, off_t skip, 877 bool to_sram); 878 879 static inline size_t mv_cesa_sg_copy_to_sram(struct mv_cesa_engine *engine, 880 struct scatterlist *sgl, 881 unsigned int nents, 882 unsigned int sram_off, 883 size_t buflen, off_t skip) 884 { 885 return mv_cesa_sg_copy(engine, sgl, nents, sram_off, buflen, skip, 886 true); 887 } 888 889 static inline size_t mv_cesa_sg_copy_from_sram(struct mv_cesa_engine *engine, 890 struct scatterlist *sgl, 891 unsigned int nents, 892 unsigned int sram_off, 893 size_t buflen, off_t skip) 894 { 895 return mv_cesa_sg_copy(engine, sgl, nents, sram_off, buflen, skip, 896 false); 897 } 898 899 /* Algorithm definitions */ 900 901 extern struct ahash_alg mv_md5_alg; 902 extern struct ahash_alg mv_sha1_alg; 903 extern struct ahash_alg mv_sha256_alg; 904 extern struct ahash_alg mv_ahmac_md5_alg; 905 extern struct ahash_alg mv_ahmac_sha1_alg; 906 extern struct ahash_alg mv_ahmac_sha256_alg; 907 908 extern struct skcipher_alg mv_cesa_ecb_des_alg; 909 extern struct skcipher_alg mv_cesa_cbc_des_alg; 910 extern struct skcipher_alg mv_cesa_ecb_des3_ede_alg; 911 extern struct skcipher_alg mv_cesa_cbc_des3_ede_alg; 912 extern struct skcipher_alg mv_cesa_ecb_aes_alg; 913 extern struct skcipher_alg mv_cesa_cbc_aes_alg; 914 915 #endif /* __MARVELL_CESA_H__ */ 916