1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Cryptographic API. 4 * 5 * Support for OMAP SHA1/MD5 HW acceleration. 6 * 7 * Copyright (c) 2010 Nokia Corporation 8 * Author: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> 9 * Copyright (c) 2011 Texas Instruments Incorporated 10 * 11 * Some ideas are from old omap-sha1-md5.c driver. 12 */ 13 14 #define pr_fmt(fmt) "%s: " fmt, __func__ 15 16 #include <crypto/engine.h> 17 #include <crypto/hmac.h> 18 #include <crypto/internal/hash.h> 19 #include <crypto/scatterwalk.h> 20 #include <crypto/sha1.h> 21 #include <crypto/sha2.h> 22 #include <linux/err.h> 23 #include <linux/device.h> 24 #include <linux/dma-mapping.h> 25 #include <linux/dmaengine.h> 26 #include <linux/init.h> 27 #include <linux/interrupt.h> 28 #include <linux/io.h> 29 #include <linux/irq.h> 30 #include <linux/kernel.h> 31 #include <linux/module.h> 32 #include <linux/of.h> 33 #include <linux/of_address.h> 34 #include <linux/of_irq.h> 35 #include <linux/platform_device.h> 36 #include <linux/pm_runtime.h> 37 #include <linux/scatterlist.h> 38 #include <linux/slab.h> 39 #include <linux/string.h> 40 #include <linux/workqueue.h> 41 42 #define MD5_DIGEST_SIZE 16 43 44 #define SHA_REG_IDIGEST(dd, x) ((dd)->pdata->idigest_ofs + ((x)*0x04)) 45 #define SHA_REG_DIN(dd, x) ((dd)->pdata->din_ofs + ((x) * 0x04)) 46 #define SHA_REG_DIGCNT(dd) ((dd)->pdata->digcnt_ofs) 47 48 #define SHA_REG_ODIGEST(dd, x) ((dd)->pdata->odigest_ofs + (x * 0x04)) 49 50 #define SHA_REG_CTRL 0x18 51 #define SHA_REG_CTRL_LENGTH (0xFFFFFFFF << 5) 52 #define SHA_REG_CTRL_CLOSE_HASH (1 << 4) 53 #define SHA_REG_CTRL_ALGO_CONST (1 << 3) 54 #define SHA_REG_CTRL_ALGO (1 << 2) 55 #define SHA_REG_CTRL_INPUT_READY (1 << 1) 56 #define SHA_REG_CTRL_OUTPUT_READY (1 << 0) 57 58 #define SHA_REG_REV(dd) ((dd)->pdata->rev_ofs) 59 60 #define SHA_REG_MASK(dd) ((dd)->pdata->mask_ofs) 61 #define SHA_REG_MASK_DMA_EN (1 << 3) 62 #define SHA_REG_MASK_IT_EN (1 << 2) 63 #define SHA_REG_MASK_SOFTRESET (1 << 1) 64 #define SHA_REG_AUTOIDLE (1 << 0) 65 66 #define SHA_REG_SYSSTATUS(dd) ((dd)->pdata->sysstatus_ofs) 67 #define SHA_REG_SYSSTATUS_RESETDONE (1 << 0) 68 69 #define SHA_REG_MODE(dd) ((dd)->pdata->mode_ofs) 70 #define SHA_REG_MODE_HMAC_OUTER_HASH (1 << 7) 71 #define SHA_REG_MODE_HMAC_KEY_PROC (1 << 5) 72 #define SHA_REG_MODE_CLOSE_HASH (1 << 4) 73 #define SHA_REG_MODE_ALGO_CONSTANT (1 << 3) 74 75 #define SHA_REG_MODE_ALGO_MASK (7 << 0) 76 #define SHA_REG_MODE_ALGO_MD5_128 (0 << 1) 77 #define SHA_REG_MODE_ALGO_SHA1_160 (1 << 1) 78 #define SHA_REG_MODE_ALGO_SHA2_224 (2 << 1) 79 #define SHA_REG_MODE_ALGO_SHA2_256 (3 << 1) 80 #define SHA_REG_MODE_ALGO_SHA2_384 (1 << 0) 81 #define SHA_REG_MODE_ALGO_SHA2_512 (3 << 0) 82 83 #define SHA_REG_LENGTH(dd) ((dd)->pdata->length_ofs) 84 85 #define SHA_REG_IRQSTATUS 0x118 86 #define SHA_REG_IRQSTATUS_CTX_RDY (1 << 3) 87 #define SHA_REG_IRQSTATUS_PARTHASH_RDY (1 << 2) 88 #define SHA_REG_IRQSTATUS_INPUT_RDY (1 << 1) 89 #define SHA_REG_IRQSTATUS_OUTPUT_RDY (1 << 0) 90 91 #define SHA_REG_IRQENA 0x11C 92 #define SHA_REG_IRQENA_CTX_RDY (1 << 3) 93 #define SHA_REG_IRQENA_PARTHASH_RDY (1 << 2) 94 #define SHA_REG_IRQENA_INPUT_RDY (1 << 1) 95 #define SHA_REG_IRQENA_OUTPUT_RDY (1 << 0) 96 97 #define DEFAULT_TIMEOUT_INTERVAL HZ 98 99 #define DEFAULT_AUTOSUSPEND_DELAY 1000 100 101 /* mostly device flags */ 102 #define FLAGS_FINAL 1 103 #define FLAGS_DMA_ACTIVE 2 104 #define FLAGS_OUTPUT_READY 3 105 #define FLAGS_CPU 5 106 #define FLAGS_DMA_READY 6 107 #define FLAGS_AUTO_XOR 7 108 #define FLAGS_BE32_SHA1 8 109 #define FLAGS_SGS_COPIED 9 110 #define FLAGS_SGS_ALLOCED 10 111 #define FLAGS_HUGE 11 112 113 /* context flags */ 114 #define FLAGS_FINUP 16 115 116 #define FLAGS_MODE_SHIFT 18 117 #define FLAGS_MODE_MASK (SHA_REG_MODE_ALGO_MASK << FLAGS_MODE_SHIFT) 118 #define FLAGS_MODE_MD5 (SHA_REG_MODE_ALGO_MD5_128 << FLAGS_MODE_SHIFT) 119 #define FLAGS_MODE_SHA1 (SHA_REG_MODE_ALGO_SHA1_160 << FLAGS_MODE_SHIFT) 120 #define FLAGS_MODE_SHA224 (SHA_REG_MODE_ALGO_SHA2_224 << FLAGS_MODE_SHIFT) 121 #define FLAGS_MODE_SHA256 (SHA_REG_MODE_ALGO_SHA2_256 << FLAGS_MODE_SHIFT) 122 #define FLAGS_MODE_SHA384 (SHA_REG_MODE_ALGO_SHA2_384 << FLAGS_MODE_SHIFT) 123 #define FLAGS_MODE_SHA512 (SHA_REG_MODE_ALGO_SHA2_512 << FLAGS_MODE_SHIFT) 124 125 #define FLAGS_HMAC 21 126 #define FLAGS_ERROR 22 127 128 #define OP_UPDATE 1 129 #define OP_FINAL 2 130 131 #define OMAP_ALIGN_MASK (sizeof(u32)-1) 132 #define OMAP_ALIGNED __attribute__((aligned(sizeof(u32)))) 133 134 #define BUFLEN SHA512_BLOCK_SIZE 135 #define OMAP_SHA_DMA_THRESHOLD 256 136 137 #define OMAP_SHA_MAX_DMA_LEN (1024 * 2048) 138 139 struct omap_sham_dev; 140 141 struct omap_sham_reqctx { 142 struct omap_sham_dev *dd; 143 unsigned long flags; 144 u8 op; 145 146 u8 digest[SHA512_DIGEST_SIZE] OMAP_ALIGNED; 147 size_t digcnt; 148 size_t bufcnt; 149 size_t buflen; 150 151 /* walk state */ 152 struct scatterlist *sg; 153 struct scatterlist sgl[2]; 154 int offset; /* offset in current sg */ 155 int sg_len; 156 unsigned int total; /* total request */ 157 158 u8 buffer[] OMAP_ALIGNED; 159 }; 160 161 struct omap_sham_hmac_ctx { 162 struct crypto_shash *shash; 163 u8 ipad[SHA512_BLOCK_SIZE] OMAP_ALIGNED; 164 u8 opad[SHA512_BLOCK_SIZE] OMAP_ALIGNED; 165 }; 166 167 struct omap_sham_ctx { 168 unsigned long flags; 169 170 /* fallback stuff */ 171 struct crypto_shash *fallback; 172 173 struct omap_sham_hmac_ctx base[]; 174 }; 175 176 #define OMAP_SHAM_QUEUE_LENGTH 10 177 178 struct omap_sham_algs_info { 179 struct ahash_engine_alg *algs_list; 180 unsigned int size; 181 unsigned int registered; 182 }; 183 184 struct omap_sham_pdata { 185 struct omap_sham_algs_info *algs_info; 186 unsigned int algs_info_size; 187 unsigned long flags; 188 int digest_size; 189 190 void (*copy_hash)(struct ahash_request *req, int out); 191 void (*write_ctrl)(struct omap_sham_dev *dd, size_t length, 192 int final, int dma); 193 void (*trigger)(struct omap_sham_dev *dd, size_t length); 194 int (*poll_irq)(struct omap_sham_dev *dd); 195 irqreturn_t (*intr_hdlr)(int irq, void *dev_id); 196 197 u32 odigest_ofs; 198 u32 idigest_ofs; 199 u32 din_ofs; 200 u32 digcnt_ofs; 201 u32 rev_ofs; 202 u32 mask_ofs; 203 u32 sysstatus_ofs; 204 u32 mode_ofs; 205 u32 length_ofs; 206 207 u32 major_mask; 208 u32 major_shift; 209 u32 minor_mask; 210 u32 minor_shift; 211 }; 212 213 struct omap_sham_dev { 214 struct list_head list; 215 unsigned long phys_base; 216 struct device *dev; 217 void __iomem *io_base; 218 int irq; 219 int err; 220 struct dma_chan *dma_lch; 221 struct work_struct done_task; 222 u8 polling_mode; 223 u8 xmit_buf[BUFLEN] OMAP_ALIGNED; 224 225 unsigned long flags; 226 int fallback_sz; 227 struct crypto_queue queue; 228 struct ahash_request *req; 229 struct crypto_engine *engine; 230 231 const struct omap_sham_pdata *pdata; 232 }; 233 234 struct omap_sham_drv { 235 struct list_head dev_list; 236 spinlock_t lock; 237 unsigned long flags; 238 }; 239 240 static struct omap_sham_drv sham = { 241 .dev_list = LIST_HEAD_INIT(sham.dev_list), 242 .lock = __SPIN_LOCK_UNLOCKED(sham.lock), 243 }; 244 245 static int omap_sham_enqueue(struct ahash_request *req, unsigned int op); 246 static void omap_sham_finish_req(struct ahash_request *req, int err); 247 248 static inline u32 omap_sham_read(struct omap_sham_dev *dd, u32 offset) 249 { 250 return __raw_readl(dd->io_base + offset); 251 } 252 253 static inline void omap_sham_write(struct omap_sham_dev *dd, 254 u32 offset, u32 value) 255 { 256 __raw_writel(value, dd->io_base + offset); 257 } 258 259 static inline void omap_sham_write_mask(struct omap_sham_dev *dd, u32 address, 260 u32 value, u32 mask) 261 { 262 u32 val; 263 264 val = omap_sham_read(dd, address); 265 val &= ~mask; 266 val |= value; 267 omap_sham_write(dd, address, val); 268 } 269 270 static inline int omap_sham_wait(struct omap_sham_dev *dd, u32 offset, u32 bit) 271 { 272 unsigned long timeout = jiffies + DEFAULT_TIMEOUT_INTERVAL; 273 274 while (!(omap_sham_read(dd, offset) & bit)) { 275 if (time_is_before_jiffies(timeout)) 276 return -ETIMEDOUT; 277 } 278 279 return 0; 280 } 281 282 static void omap_sham_copy_hash_omap2(struct ahash_request *req, int out) 283 { 284 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 285 struct omap_sham_dev *dd = ctx->dd; 286 u32 *hash = (u32 *)ctx->digest; 287 int i; 288 289 for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) { 290 if (out) 291 hash[i] = omap_sham_read(dd, SHA_REG_IDIGEST(dd, i)); 292 else 293 omap_sham_write(dd, SHA_REG_IDIGEST(dd, i), hash[i]); 294 } 295 } 296 297 static void omap_sham_copy_hash_omap4(struct ahash_request *req, int out) 298 { 299 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 300 struct omap_sham_dev *dd = ctx->dd; 301 int i; 302 303 if (ctx->flags & BIT(FLAGS_HMAC)) { 304 struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req); 305 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm); 306 struct omap_sham_hmac_ctx *bctx = tctx->base; 307 u32 *opad = (u32 *)bctx->opad; 308 309 for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) { 310 if (out) 311 opad[i] = omap_sham_read(dd, 312 SHA_REG_ODIGEST(dd, i)); 313 else 314 omap_sham_write(dd, SHA_REG_ODIGEST(dd, i), 315 opad[i]); 316 } 317 } 318 319 omap_sham_copy_hash_omap2(req, out); 320 } 321 322 static void omap_sham_copy_ready_hash(struct ahash_request *req) 323 { 324 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 325 u32 *in = (u32 *)ctx->digest; 326 u32 *hash = (u32 *)req->result; 327 int i, d, big_endian = 0; 328 329 if (!hash) 330 return; 331 332 switch (ctx->flags & FLAGS_MODE_MASK) { 333 case FLAGS_MODE_MD5: 334 d = MD5_DIGEST_SIZE / sizeof(u32); 335 break; 336 case FLAGS_MODE_SHA1: 337 /* OMAP2 SHA1 is big endian */ 338 if (test_bit(FLAGS_BE32_SHA1, &ctx->dd->flags)) 339 big_endian = 1; 340 d = SHA1_DIGEST_SIZE / sizeof(u32); 341 break; 342 case FLAGS_MODE_SHA224: 343 d = SHA224_DIGEST_SIZE / sizeof(u32); 344 break; 345 case FLAGS_MODE_SHA256: 346 d = SHA256_DIGEST_SIZE / sizeof(u32); 347 break; 348 case FLAGS_MODE_SHA384: 349 d = SHA384_DIGEST_SIZE / sizeof(u32); 350 break; 351 case FLAGS_MODE_SHA512: 352 d = SHA512_DIGEST_SIZE / sizeof(u32); 353 break; 354 default: 355 d = 0; 356 } 357 358 if (big_endian) 359 for (i = 0; i < d; i++) 360 put_unaligned(be32_to_cpup((__be32 *)in + i), &hash[i]); 361 else 362 for (i = 0; i < d; i++) 363 put_unaligned(le32_to_cpup((__le32 *)in + i), &hash[i]); 364 } 365 366 static void omap_sham_write_ctrl_omap2(struct omap_sham_dev *dd, size_t length, 367 int final, int dma) 368 { 369 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); 370 u32 val = length << 5, mask; 371 372 if (likely(ctx->digcnt)) 373 omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt); 374 375 omap_sham_write_mask(dd, SHA_REG_MASK(dd), 376 SHA_REG_MASK_IT_EN | (dma ? SHA_REG_MASK_DMA_EN : 0), 377 SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN); 378 /* 379 * Setting ALGO_CONST only for the first iteration 380 * and CLOSE_HASH only for the last one. 381 */ 382 if ((ctx->flags & FLAGS_MODE_MASK) == FLAGS_MODE_SHA1) 383 val |= SHA_REG_CTRL_ALGO; 384 if (!ctx->digcnt) 385 val |= SHA_REG_CTRL_ALGO_CONST; 386 if (final) 387 val |= SHA_REG_CTRL_CLOSE_HASH; 388 389 mask = SHA_REG_CTRL_ALGO_CONST | SHA_REG_CTRL_CLOSE_HASH | 390 SHA_REG_CTRL_ALGO | SHA_REG_CTRL_LENGTH; 391 392 omap_sham_write_mask(dd, SHA_REG_CTRL, val, mask); 393 } 394 395 static void omap_sham_trigger_omap2(struct omap_sham_dev *dd, size_t length) 396 { 397 } 398 399 static int omap_sham_poll_irq_omap2(struct omap_sham_dev *dd) 400 { 401 return omap_sham_wait(dd, SHA_REG_CTRL, SHA_REG_CTRL_INPUT_READY); 402 } 403 404 static int get_block_size(struct omap_sham_reqctx *ctx) 405 { 406 int d; 407 408 switch (ctx->flags & FLAGS_MODE_MASK) { 409 case FLAGS_MODE_MD5: 410 case FLAGS_MODE_SHA1: 411 d = SHA1_BLOCK_SIZE; 412 break; 413 case FLAGS_MODE_SHA224: 414 case FLAGS_MODE_SHA256: 415 d = SHA256_BLOCK_SIZE; 416 break; 417 case FLAGS_MODE_SHA384: 418 case FLAGS_MODE_SHA512: 419 d = SHA512_BLOCK_SIZE; 420 break; 421 default: 422 d = 0; 423 } 424 425 return d; 426 } 427 428 static void omap_sham_write_n(struct omap_sham_dev *dd, u32 offset, 429 u32 *value, int count) 430 { 431 for (; count--; value++, offset += 4) 432 omap_sham_write(dd, offset, *value); 433 } 434 435 static void omap_sham_write_ctrl_omap4(struct omap_sham_dev *dd, size_t length, 436 int final, int dma) 437 { 438 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); 439 u32 val, mask; 440 441 if (likely(ctx->digcnt)) 442 omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt); 443 444 /* 445 * Setting ALGO_CONST only for the first iteration and 446 * CLOSE_HASH only for the last one. Note that flags mode bits 447 * correspond to algorithm encoding in mode register. 448 */ 449 val = (ctx->flags & FLAGS_MODE_MASK) >> (FLAGS_MODE_SHIFT); 450 if (!ctx->digcnt) { 451 struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req); 452 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm); 453 struct omap_sham_hmac_ctx *bctx = tctx->base; 454 int bs, nr_dr; 455 456 val |= SHA_REG_MODE_ALGO_CONSTANT; 457 458 if (ctx->flags & BIT(FLAGS_HMAC)) { 459 bs = get_block_size(ctx); 460 nr_dr = bs / (2 * sizeof(u32)); 461 val |= SHA_REG_MODE_HMAC_KEY_PROC; 462 omap_sham_write_n(dd, SHA_REG_ODIGEST(dd, 0), 463 (u32 *)bctx->ipad, nr_dr); 464 omap_sham_write_n(dd, SHA_REG_IDIGEST(dd, 0), 465 (u32 *)bctx->ipad + nr_dr, nr_dr); 466 ctx->digcnt += bs; 467 } 468 } 469 470 if (final) { 471 val |= SHA_REG_MODE_CLOSE_HASH; 472 473 if (ctx->flags & BIT(FLAGS_HMAC)) 474 val |= SHA_REG_MODE_HMAC_OUTER_HASH; 475 } 476 477 mask = SHA_REG_MODE_ALGO_CONSTANT | SHA_REG_MODE_CLOSE_HASH | 478 SHA_REG_MODE_ALGO_MASK | SHA_REG_MODE_HMAC_OUTER_HASH | 479 SHA_REG_MODE_HMAC_KEY_PROC; 480 481 dev_dbg(dd->dev, "ctrl: %08x, flags: %08lx\n", val, ctx->flags); 482 omap_sham_write_mask(dd, SHA_REG_MODE(dd), val, mask); 483 omap_sham_write(dd, SHA_REG_IRQENA, SHA_REG_IRQENA_OUTPUT_RDY); 484 omap_sham_write_mask(dd, SHA_REG_MASK(dd), 485 SHA_REG_MASK_IT_EN | 486 (dma ? SHA_REG_MASK_DMA_EN : 0), 487 SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN); 488 } 489 490 static void omap_sham_trigger_omap4(struct omap_sham_dev *dd, size_t length) 491 { 492 omap_sham_write(dd, SHA_REG_LENGTH(dd), length); 493 } 494 495 static int omap_sham_poll_irq_omap4(struct omap_sham_dev *dd) 496 { 497 return omap_sham_wait(dd, SHA_REG_IRQSTATUS, 498 SHA_REG_IRQSTATUS_INPUT_RDY); 499 } 500 501 static int omap_sham_xmit_cpu(struct omap_sham_dev *dd, size_t length, 502 int final) 503 { 504 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); 505 int count, len32, bs32, offset = 0; 506 const u32 *buffer; 507 int mlen; 508 struct sg_mapping_iter mi; 509 510 dev_dbg(dd->dev, "xmit_cpu: digcnt: %zd, length: %zd, final: %d\n", 511 ctx->digcnt, length, final); 512 513 dd->pdata->write_ctrl(dd, length, final, 0); 514 dd->pdata->trigger(dd, length); 515 516 /* should be non-zero before next lines to disable clocks later */ 517 ctx->digcnt += length; 518 ctx->total -= length; 519 520 if (final) 521 set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */ 522 523 set_bit(FLAGS_CPU, &dd->flags); 524 525 len32 = DIV_ROUND_UP(length, sizeof(u32)); 526 bs32 = get_block_size(ctx) / sizeof(u32); 527 528 sg_miter_start(&mi, ctx->sg, ctx->sg_len, 529 SG_MITER_FROM_SG | SG_MITER_ATOMIC); 530 531 mlen = 0; 532 533 while (len32) { 534 if (dd->pdata->poll_irq(dd)) 535 return -ETIMEDOUT; 536 537 for (count = 0; count < min(len32, bs32); count++, offset++) { 538 if (!mlen) { 539 sg_miter_next(&mi); 540 mlen = mi.length; 541 if (!mlen) { 542 pr_err("sg miter failure.\n"); 543 return -EINVAL; 544 } 545 offset = 0; 546 buffer = mi.addr; 547 } 548 omap_sham_write(dd, SHA_REG_DIN(dd, count), 549 buffer[offset]); 550 mlen -= 4; 551 } 552 len32 -= min(len32, bs32); 553 } 554 555 sg_miter_stop(&mi); 556 557 return -EINPROGRESS; 558 } 559 560 static void omap_sham_dma_callback(void *param) 561 { 562 struct omap_sham_dev *dd = param; 563 564 set_bit(FLAGS_DMA_READY, &dd->flags); 565 queue_work(system_bh_wq, &dd->done_task); 566 } 567 568 static int omap_sham_xmit_dma(struct omap_sham_dev *dd, size_t length, 569 int final) 570 { 571 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); 572 struct dma_async_tx_descriptor *tx; 573 struct dma_slave_config cfg; 574 int ret; 575 576 dev_dbg(dd->dev, "xmit_dma: digcnt: %zd, length: %zd, final: %d\n", 577 ctx->digcnt, length, final); 578 579 if (!dma_map_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE)) { 580 dev_err(dd->dev, "dma_map_sg error\n"); 581 return -EINVAL; 582 } 583 584 memset(&cfg, 0, sizeof(cfg)); 585 586 cfg.dst_addr = dd->phys_base + SHA_REG_DIN(dd, 0); 587 cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 588 cfg.dst_maxburst = get_block_size(ctx) / DMA_SLAVE_BUSWIDTH_4_BYTES; 589 590 ret = dmaengine_slave_config(dd->dma_lch, &cfg); 591 if (ret) { 592 pr_err("omap-sham: can't configure dmaengine slave: %d\n", ret); 593 return ret; 594 } 595 596 tx = dmaengine_prep_slave_sg(dd->dma_lch, ctx->sg, ctx->sg_len, 597 DMA_MEM_TO_DEV, 598 DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 599 600 if (!tx) { 601 dev_err(dd->dev, "prep_slave_sg failed\n"); 602 return -EINVAL; 603 } 604 605 tx->callback = omap_sham_dma_callback; 606 tx->callback_param = dd; 607 608 dd->pdata->write_ctrl(dd, length, final, 1); 609 610 ctx->digcnt += length; 611 ctx->total -= length; 612 613 if (final) 614 set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */ 615 616 set_bit(FLAGS_DMA_ACTIVE, &dd->flags); 617 618 dmaengine_submit(tx); 619 dma_async_issue_pending(dd->dma_lch); 620 621 dd->pdata->trigger(dd, length); 622 623 return -EINPROGRESS; 624 } 625 626 static int omap_sham_copy_sg_lists(struct omap_sham_reqctx *ctx, 627 struct scatterlist *sg, int bs, int new_len) 628 { 629 int n = sg_nents(sg); 630 struct scatterlist *tmp; 631 int offset = ctx->offset; 632 633 ctx->total = new_len; 634 635 if (ctx->bufcnt) 636 n++; 637 638 ctx->sg = kmalloc_array(n, sizeof(*sg), GFP_KERNEL); 639 if (!ctx->sg) 640 return -ENOMEM; 641 642 sg_init_table(ctx->sg, n); 643 644 tmp = ctx->sg; 645 646 ctx->sg_len = 0; 647 648 if (ctx->bufcnt) { 649 sg_set_buf(tmp, ctx->dd->xmit_buf, ctx->bufcnt); 650 tmp = sg_next(tmp); 651 ctx->sg_len++; 652 new_len -= ctx->bufcnt; 653 } 654 655 while (sg && new_len) { 656 int len = sg->length - offset; 657 658 if (len <= 0) { 659 offset -= sg->length; 660 sg = sg_next(sg); 661 continue; 662 } 663 664 if (new_len < len) 665 len = new_len; 666 667 if (len > 0) { 668 new_len -= len; 669 sg_set_page(tmp, sg_page(sg), len, sg->offset + offset); 670 offset = 0; 671 ctx->offset = 0; 672 ctx->sg_len++; 673 if (new_len <= 0) 674 break; 675 tmp = sg_next(tmp); 676 } 677 678 sg = sg_next(sg); 679 } 680 681 if (tmp) 682 sg_mark_end(tmp); 683 684 set_bit(FLAGS_SGS_ALLOCED, &ctx->dd->flags); 685 686 ctx->offset += new_len - ctx->bufcnt; 687 ctx->bufcnt = 0; 688 689 return 0; 690 } 691 692 static int omap_sham_copy_sgs(struct omap_sham_reqctx *ctx, 693 struct scatterlist *sg, int bs, 694 unsigned int new_len) 695 { 696 int pages; 697 void *buf; 698 699 pages = get_order(new_len); 700 701 buf = (void *)__get_free_pages(GFP_ATOMIC, pages); 702 if (!buf) { 703 pr_err("Couldn't allocate pages for unaligned cases.\n"); 704 return -ENOMEM; 705 } 706 707 if (ctx->bufcnt) 708 memcpy(buf, ctx->dd->xmit_buf, ctx->bufcnt); 709 710 scatterwalk_map_and_copy(buf + ctx->bufcnt, sg, ctx->offset, 711 min(new_len, ctx->total) - ctx->bufcnt, 0); 712 sg_init_table(ctx->sgl, 1); 713 sg_set_buf(ctx->sgl, buf, new_len); 714 ctx->sg = ctx->sgl; 715 set_bit(FLAGS_SGS_COPIED, &ctx->dd->flags); 716 ctx->sg_len = 1; 717 ctx->offset += new_len - ctx->bufcnt; 718 ctx->bufcnt = 0; 719 ctx->total = new_len; 720 721 return 0; 722 } 723 724 static int omap_sham_align_sgs(struct scatterlist *sg, 725 int nbytes, int bs, bool final, 726 struct omap_sham_reqctx *rctx) 727 { 728 int n = 0; 729 bool aligned = true; 730 bool list_ok = true; 731 struct scatterlist *sg_tmp = sg; 732 int new_len; 733 int offset = rctx->offset; 734 int bufcnt = rctx->bufcnt; 735 736 if (!sg || !sg->length || !nbytes) { 737 if (bufcnt) { 738 bufcnt = DIV_ROUND_UP(bufcnt, bs) * bs; 739 sg_init_table(rctx->sgl, 1); 740 sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, bufcnt); 741 rctx->sg = rctx->sgl; 742 rctx->sg_len = 1; 743 } 744 745 return 0; 746 } 747 748 new_len = nbytes; 749 750 if (offset) 751 list_ok = false; 752 753 if (final) 754 new_len = DIV_ROUND_UP(new_len, bs) * bs; 755 else 756 new_len = (new_len - 1) / bs * bs; 757 758 if (!new_len) 759 return 0; 760 761 if (nbytes != new_len) 762 list_ok = false; 763 764 while (nbytes > 0 && sg_tmp) { 765 n++; 766 767 if (bufcnt) { 768 if (!IS_ALIGNED(bufcnt, bs)) { 769 aligned = false; 770 break; 771 } 772 nbytes -= bufcnt; 773 bufcnt = 0; 774 if (!nbytes) 775 list_ok = false; 776 777 continue; 778 } 779 780 #ifdef CONFIG_ZONE_DMA 781 if (page_zonenum(sg_page(sg_tmp)) != ZONE_DMA) { 782 aligned = false; 783 break; 784 } 785 #endif 786 787 if (offset < sg_tmp->length) { 788 if (!IS_ALIGNED(offset + sg_tmp->offset, 4)) { 789 aligned = false; 790 break; 791 } 792 793 if (!IS_ALIGNED(sg_tmp->length - offset, bs)) { 794 aligned = false; 795 break; 796 } 797 } 798 799 if (offset) { 800 offset -= sg_tmp->length; 801 if (offset < 0) { 802 nbytes += offset; 803 offset = 0; 804 } 805 } else { 806 nbytes -= sg_tmp->length; 807 } 808 809 sg_tmp = sg_next(sg_tmp); 810 811 if (nbytes < 0) { 812 list_ok = false; 813 break; 814 } 815 } 816 817 if (new_len > OMAP_SHA_MAX_DMA_LEN) { 818 new_len = OMAP_SHA_MAX_DMA_LEN; 819 aligned = false; 820 } 821 822 if (!aligned) 823 return omap_sham_copy_sgs(rctx, sg, bs, new_len); 824 else if (!list_ok) 825 return omap_sham_copy_sg_lists(rctx, sg, bs, new_len); 826 827 rctx->total = new_len; 828 rctx->offset += new_len; 829 rctx->sg_len = n; 830 if (rctx->bufcnt) { 831 sg_init_table(rctx->sgl, 2); 832 sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, rctx->bufcnt); 833 sg_chain(rctx->sgl, 2, sg); 834 rctx->sg = rctx->sgl; 835 } else { 836 rctx->sg = sg; 837 } 838 839 return 0; 840 } 841 842 static int omap_sham_prepare_request(struct crypto_engine *engine, void *areq) 843 { 844 struct ahash_request *req = container_of(areq, struct ahash_request, 845 base); 846 struct omap_sham_reqctx *rctx = ahash_request_ctx(req); 847 int bs; 848 int ret; 849 unsigned int nbytes; 850 bool final = rctx->flags & BIT(FLAGS_FINUP); 851 bool update = rctx->op == OP_UPDATE; 852 int hash_later; 853 854 bs = get_block_size(rctx); 855 856 nbytes = rctx->bufcnt; 857 858 if (update) 859 nbytes += req->nbytes - rctx->offset; 860 861 dev_dbg(rctx->dd->dev, 862 "%s: nbytes=%d, bs=%d, total=%d, offset=%d, bufcnt=%zd\n", 863 __func__, nbytes, bs, rctx->total, rctx->offset, 864 rctx->bufcnt); 865 866 if (!nbytes) 867 return 0; 868 869 rctx->total = nbytes; 870 871 if (update && req->nbytes && (!IS_ALIGNED(rctx->bufcnt, bs))) { 872 int len = bs - rctx->bufcnt % bs; 873 874 if (len > req->nbytes) 875 len = req->nbytes; 876 scatterwalk_map_and_copy(rctx->buffer + rctx->bufcnt, req->src, 877 0, len, 0); 878 rctx->bufcnt += len; 879 rctx->offset = len; 880 } 881 882 if (rctx->bufcnt) 883 memcpy(rctx->dd->xmit_buf, rctx->buffer, rctx->bufcnt); 884 885 ret = omap_sham_align_sgs(req->src, nbytes, bs, final, rctx); 886 if (ret) 887 return ret; 888 889 hash_later = nbytes - rctx->total; 890 if (hash_later < 0) 891 hash_later = 0; 892 893 if (hash_later && hash_later <= rctx->buflen) { 894 scatterwalk_map_and_copy(rctx->buffer, 895 req->src, 896 req->nbytes - hash_later, 897 hash_later, 0); 898 899 rctx->bufcnt = hash_later; 900 } else { 901 rctx->bufcnt = 0; 902 } 903 904 if (hash_later > rctx->buflen) 905 set_bit(FLAGS_HUGE, &rctx->dd->flags); 906 907 rctx->total = min(nbytes, rctx->total); 908 909 return 0; 910 } 911 912 static int omap_sham_update_dma_stop(struct omap_sham_dev *dd) 913 { 914 struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); 915 916 dma_unmap_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE); 917 918 clear_bit(FLAGS_DMA_ACTIVE, &dd->flags); 919 920 return 0; 921 } 922 923 static struct omap_sham_dev *omap_sham_find_dev(struct omap_sham_reqctx *ctx) 924 { 925 struct omap_sham_dev *dd; 926 927 if (ctx->dd) 928 return ctx->dd; 929 930 spin_lock_bh(&sham.lock); 931 dd = list_first_entry(&sham.dev_list, struct omap_sham_dev, list); 932 list_move_tail(&dd->list, &sham.dev_list); 933 ctx->dd = dd; 934 spin_unlock_bh(&sham.lock); 935 936 return dd; 937 } 938 939 static int omap_sham_init(struct ahash_request *req) 940 { 941 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 942 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm); 943 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 944 struct omap_sham_dev *dd; 945 int bs = 0; 946 947 ctx->dd = NULL; 948 949 dd = omap_sham_find_dev(ctx); 950 if (!dd) 951 return -ENODEV; 952 953 ctx->flags = 0; 954 955 dev_dbg(dd->dev, "init: digest size: %d\n", 956 crypto_ahash_digestsize(tfm)); 957 958 switch (crypto_ahash_digestsize(tfm)) { 959 case MD5_DIGEST_SIZE: 960 ctx->flags |= FLAGS_MODE_MD5; 961 bs = SHA1_BLOCK_SIZE; 962 break; 963 case SHA1_DIGEST_SIZE: 964 ctx->flags |= FLAGS_MODE_SHA1; 965 bs = SHA1_BLOCK_SIZE; 966 break; 967 case SHA224_DIGEST_SIZE: 968 ctx->flags |= FLAGS_MODE_SHA224; 969 bs = SHA224_BLOCK_SIZE; 970 break; 971 case SHA256_DIGEST_SIZE: 972 ctx->flags |= FLAGS_MODE_SHA256; 973 bs = SHA256_BLOCK_SIZE; 974 break; 975 case SHA384_DIGEST_SIZE: 976 ctx->flags |= FLAGS_MODE_SHA384; 977 bs = SHA384_BLOCK_SIZE; 978 break; 979 case SHA512_DIGEST_SIZE: 980 ctx->flags |= FLAGS_MODE_SHA512; 981 bs = SHA512_BLOCK_SIZE; 982 break; 983 } 984 985 ctx->bufcnt = 0; 986 ctx->digcnt = 0; 987 ctx->total = 0; 988 ctx->offset = 0; 989 ctx->buflen = BUFLEN; 990 991 if (tctx->flags & BIT(FLAGS_HMAC)) { 992 if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) { 993 struct omap_sham_hmac_ctx *bctx = tctx->base; 994 995 memcpy(ctx->buffer, bctx->ipad, bs); 996 ctx->bufcnt = bs; 997 } 998 999 ctx->flags |= BIT(FLAGS_HMAC); 1000 } 1001 1002 return 0; 1003 1004 } 1005 1006 static int omap_sham_update_req(struct omap_sham_dev *dd) 1007 { 1008 struct ahash_request *req = dd->req; 1009 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 1010 int err; 1011 bool final = (ctx->flags & BIT(FLAGS_FINUP)) && 1012 !(dd->flags & BIT(FLAGS_HUGE)); 1013 1014 dev_dbg(dd->dev, "update_req: total: %u, digcnt: %zd, final: %d", 1015 ctx->total, ctx->digcnt, final); 1016 1017 if (ctx->total < get_block_size(ctx) || 1018 ctx->total < dd->fallback_sz) 1019 ctx->flags |= BIT(FLAGS_CPU); 1020 1021 if (ctx->flags & BIT(FLAGS_CPU)) 1022 err = omap_sham_xmit_cpu(dd, ctx->total, final); 1023 else 1024 err = omap_sham_xmit_dma(dd, ctx->total, final); 1025 1026 /* wait for dma completion before can take more data */ 1027 dev_dbg(dd->dev, "update: err: %d, digcnt: %zd\n", err, ctx->digcnt); 1028 1029 return err; 1030 } 1031 1032 static int omap_sham_final_req(struct omap_sham_dev *dd) 1033 { 1034 struct ahash_request *req = dd->req; 1035 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 1036 int err = 0, use_dma = 1; 1037 1038 if (dd->flags & BIT(FLAGS_HUGE)) 1039 return 0; 1040 1041 if ((ctx->total <= get_block_size(ctx)) || dd->polling_mode) 1042 /* 1043 * faster to handle last block with cpu or 1044 * use cpu when dma is not present. 1045 */ 1046 use_dma = 0; 1047 1048 if (use_dma) 1049 err = omap_sham_xmit_dma(dd, ctx->total, 1); 1050 else 1051 err = omap_sham_xmit_cpu(dd, ctx->total, 1); 1052 1053 ctx->bufcnt = 0; 1054 1055 dev_dbg(dd->dev, "final_req: err: %d\n", err); 1056 1057 return err; 1058 } 1059 1060 static int omap_sham_hash_one_req(struct crypto_engine *engine, void *areq) 1061 { 1062 struct ahash_request *req = container_of(areq, struct ahash_request, 1063 base); 1064 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 1065 struct omap_sham_dev *dd = ctx->dd; 1066 int err; 1067 bool final = (ctx->flags & BIT(FLAGS_FINUP)) && 1068 !(dd->flags & BIT(FLAGS_HUGE)); 1069 1070 dev_dbg(dd->dev, "hash-one: op: %u, total: %u, digcnt: %zd, final: %d", 1071 ctx->op, ctx->total, ctx->digcnt, final); 1072 1073 err = omap_sham_prepare_request(engine, areq); 1074 if (err) 1075 return err; 1076 1077 err = pm_runtime_resume_and_get(dd->dev); 1078 if (err < 0) { 1079 dev_err(dd->dev, "failed to get sync: %d\n", err); 1080 return err; 1081 } 1082 1083 dd->err = 0; 1084 dd->req = req; 1085 1086 if (ctx->digcnt) 1087 dd->pdata->copy_hash(req, 0); 1088 1089 if (ctx->op == OP_UPDATE) 1090 err = omap_sham_update_req(dd); 1091 else if (ctx->op == OP_FINAL) 1092 err = omap_sham_final_req(dd); 1093 1094 if (err != -EINPROGRESS) 1095 omap_sham_finish_req(req, err); 1096 1097 return 0; 1098 } 1099 1100 static int omap_sham_finish_hmac(struct ahash_request *req) 1101 { 1102 struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm); 1103 struct omap_sham_hmac_ctx *bctx = tctx->base; 1104 int bs = crypto_shash_blocksize(bctx->shash); 1105 int ds = crypto_shash_digestsize(bctx->shash); 1106 SHASH_DESC_ON_STACK(shash, bctx->shash); 1107 1108 shash->tfm = bctx->shash; 1109 1110 return crypto_shash_init(shash) ?: 1111 crypto_shash_update(shash, bctx->opad, bs) ?: 1112 crypto_shash_finup(shash, req->result, ds, req->result); 1113 } 1114 1115 static int omap_sham_finish(struct ahash_request *req) 1116 { 1117 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 1118 struct omap_sham_dev *dd = ctx->dd; 1119 int err = 0; 1120 1121 if (ctx->digcnt) { 1122 omap_sham_copy_ready_hash(req); 1123 if ((ctx->flags & BIT(FLAGS_HMAC)) && 1124 !test_bit(FLAGS_AUTO_XOR, &dd->flags)) 1125 err = omap_sham_finish_hmac(req); 1126 } 1127 1128 dev_dbg(dd->dev, "digcnt: %zd, bufcnt: %zd\n", ctx->digcnt, ctx->bufcnt); 1129 1130 return err; 1131 } 1132 1133 static void omap_sham_finish_req(struct ahash_request *req, int err) 1134 { 1135 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 1136 struct omap_sham_dev *dd = ctx->dd; 1137 1138 if (test_bit(FLAGS_SGS_COPIED, &dd->flags)) 1139 free_pages((unsigned long)sg_virt(ctx->sg), 1140 get_order(ctx->sg->length)); 1141 1142 if (test_bit(FLAGS_SGS_ALLOCED, &dd->flags)) 1143 kfree(ctx->sg); 1144 1145 ctx->sg = NULL; 1146 1147 dd->flags &= ~(BIT(FLAGS_SGS_ALLOCED) | BIT(FLAGS_SGS_COPIED) | 1148 BIT(FLAGS_CPU) | BIT(FLAGS_DMA_READY) | 1149 BIT(FLAGS_OUTPUT_READY)); 1150 1151 if (!err) 1152 dd->pdata->copy_hash(req, 1); 1153 1154 if (dd->flags & BIT(FLAGS_HUGE)) { 1155 /* Re-enqueue the request */ 1156 omap_sham_enqueue(req, ctx->op); 1157 return; 1158 } 1159 1160 if (!err) { 1161 if (test_bit(FLAGS_FINAL, &dd->flags)) 1162 err = omap_sham_finish(req); 1163 } else { 1164 ctx->flags |= BIT(FLAGS_ERROR); 1165 } 1166 1167 /* atomic operation is not needed here */ 1168 dd->flags &= ~(BIT(FLAGS_FINAL) | BIT(FLAGS_CPU) | 1169 BIT(FLAGS_DMA_READY) | BIT(FLAGS_OUTPUT_READY)); 1170 1171 pm_runtime_put_autosuspend(dd->dev); 1172 1173 ctx->offset = 0; 1174 1175 crypto_finalize_hash_request(dd->engine, req, err); 1176 } 1177 1178 static int omap_sham_handle_queue(struct omap_sham_dev *dd, 1179 struct ahash_request *req) 1180 { 1181 return crypto_transfer_hash_request_to_engine(dd->engine, req); 1182 } 1183 1184 static int omap_sham_enqueue(struct ahash_request *req, unsigned int op) 1185 { 1186 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 1187 struct omap_sham_dev *dd = ctx->dd; 1188 1189 ctx->op = op; 1190 1191 return omap_sham_handle_queue(dd, req); 1192 } 1193 1194 static int omap_sham_update(struct ahash_request *req) 1195 { 1196 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 1197 struct omap_sham_dev *dd = omap_sham_find_dev(ctx); 1198 1199 if (!req->nbytes) 1200 return 0; 1201 1202 if (ctx->bufcnt + req->nbytes <= ctx->buflen) { 1203 scatterwalk_map_and_copy(ctx->buffer + ctx->bufcnt, req->src, 1204 0, req->nbytes, 0); 1205 ctx->bufcnt += req->nbytes; 1206 return 0; 1207 } 1208 1209 if (dd->polling_mode) 1210 ctx->flags |= BIT(FLAGS_CPU); 1211 1212 return omap_sham_enqueue(req, OP_UPDATE); 1213 } 1214 1215 static int omap_sham_final_shash(struct ahash_request *req) 1216 { 1217 struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm); 1218 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 1219 int offset = 0; 1220 1221 /* 1222 * If we are running HMAC on limited hardware support, skip 1223 * the ipad in the beginning of the buffer if we are going for 1224 * software fallback algorithm. 1225 */ 1226 if (test_bit(FLAGS_HMAC, &ctx->flags) && 1227 !test_bit(FLAGS_AUTO_XOR, &ctx->dd->flags)) 1228 offset = get_block_size(ctx); 1229 1230 return crypto_shash_tfm_digest(tctx->fallback, ctx->buffer + offset, 1231 ctx->bufcnt - offset, req->result); 1232 } 1233 1234 static int omap_sham_final(struct ahash_request *req) 1235 { 1236 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 1237 1238 ctx->flags |= BIT(FLAGS_FINUP); 1239 1240 if (ctx->flags & BIT(FLAGS_ERROR)) 1241 return 0; /* uncompleted hash is not needed */ 1242 1243 /* 1244 * OMAP HW accel works only with buffers >= 9. 1245 * HMAC is always >= 9 because ipad == block size. 1246 * If buffersize is less than fallback_sz, we use fallback 1247 * SW encoding, as using DMA + HW in this case doesn't provide 1248 * any benefit. 1249 */ 1250 if (!ctx->digcnt && ctx->bufcnt < ctx->dd->fallback_sz) 1251 return omap_sham_final_shash(req); 1252 else if (ctx->bufcnt) 1253 return omap_sham_enqueue(req, OP_FINAL); 1254 1255 /* copy ready hash (+ finalize hmac) */ 1256 return omap_sham_finish(req); 1257 } 1258 1259 static int omap_sham_finup(struct ahash_request *req) 1260 { 1261 struct omap_sham_reqctx *ctx = ahash_request_ctx(req); 1262 int err1, err2; 1263 1264 ctx->flags |= BIT(FLAGS_FINUP); 1265 1266 err1 = omap_sham_update(req); 1267 if (err1 == -EINPROGRESS || err1 == -EBUSY) 1268 return err1; 1269 /* 1270 * final() has to be always called to cleanup resources 1271 * even if udpate() failed, except EINPROGRESS 1272 */ 1273 err2 = omap_sham_final(req); 1274 1275 return err1 ?: err2; 1276 } 1277 1278 static int omap_sham_digest(struct ahash_request *req) 1279 { 1280 return omap_sham_init(req) ?: omap_sham_finup(req); 1281 } 1282 1283 static int omap_sham_setkey(struct crypto_ahash *tfm, const u8 *key, 1284 unsigned int keylen) 1285 { 1286 struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm); 1287 struct omap_sham_hmac_ctx *bctx = tctx->base; 1288 int bs = crypto_shash_blocksize(bctx->shash); 1289 int ds = crypto_shash_digestsize(bctx->shash); 1290 int err, i; 1291 1292 err = crypto_shash_setkey(tctx->fallback, key, keylen); 1293 if (err) 1294 return err; 1295 1296 if (keylen > bs) { 1297 err = crypto_shash_tfm_digest(bctx->shash, key, keylen, 1298 bctx->ipad); 1299 if (err) 1300 return err; 1301 keylen = ds; 1302 } else { 1303 memcpy(bctx->ipad, key, keylen); 1304 } 1305 1306 memset(bctx->ipad + keylen, 0, bs - keylen); 1307 1308 if (!test_bit(FLAGS_AUTO_XOR, &sham.flags)) { 1309 memcpy(bctx->opad, bctx->ipad, bs); 1310 1311 for (i = 0; i < bs; i++) { 1312 bctx->ipad[i] ^= HMAC_IPAD_VALUE; 1313 bctx->opad[i] ^= HMAC_OPAD_VALUE; 1314 } 1315 } 1316 1317 return err; 1318 } 1319 1320 static int omap_sham_cra_init_alg(struct crypto_tfm *tfm, const char *alg_base) 1321 { 1322 struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm); 1323 const char *alg_name = crypto_tfm_alg_name(tfm); 1324 1325 /* Allocate a fallback and abort if it failed. */ 1326 tctx->fallback = crypto_alloc_shash(alg_name, 0, 1327 CRYPTO_ALG_NEED_FALLBACK); 1328 if (IS_ERR(tctx->fallback)) { 1329 pr_err("omap-sham: fallback driver '%s' " 1330 "could not be loaded.\n", alg_name); 1331 return PTR_ERR(tctx->fallback); 1332 } 1333 1334 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), 1335 sizeof(struct omap_sham_reqctx) + BUFLEN); 1336 1337 if (alg_base) { 1338 struct omap_sham_hmac_ctx *bctx = tctx->base; 1339 tctx->flags |= BIT(FLAGS_HMAC); 1340 bctx->shash = crypto_alloc_shash(alg_base, 0, 1341 CRYPTO_ALG_NEED_FALLBACK); 1342 if (IS_ERR(bctx->shash)) { 1343 pr_err("omap-sham: base driver '%s' " 1344 "could not be loaded.\n", alg_base); 1345 crypto_free_shash(tctx->fallback); 1346 return PTR_ERR(bctx->shash); 1347 } 1348 1349 } 1350 1351 return 0; 1352 } 1353 1354 static int omap_sham_cra_init(struct crypto_tfm *tfm) 1355 { 1356 return omap_sham_cra_init_alg(tfm, NULL); 1357 } 1358 1359 static int omap_sham_cra_sha1_init(struct crypto_tfm *tfm) 1360 { 1361 return omap_sham_cra_init_alg(tfm, "sha1"); 1362 } 1363 1364 static int omap_sham_cra_sha224_init(struct crypto_tfm *tfm) 1365 { 1366 return omap_sham_cra_init_alg(tfm, "sha224"); 1367 } 1368 1369 static int omap_sham_cra_sha256_init(struct crypto_tfm *tfm) 1370 { 1371 return omap_sham_cra_init_alg(tfm, "sha256"); 1372 } 1373 1374 static int omap_sham_cra_md5_init(struct crypto_tfm *tfm) 1375 { 1376 return omap_sham_cra_init_alg(tfm, "md5"); 1377 } 1378 1379 static int omap_sham_cra_sha384_init(struct crypto_tfm *tfm) 1380 { 1381 return omap_sham_cra_init_alg(tfm, "sha384"); 1382 } 1383 1384 static int omap_sham_cra_sha512_init(struct crypto_tfm *tfm) 1385 { 1386 return omap_sham_cra_init_alg(tfm, "sha512"); 1387 } 1388 1389 static void omap_sham_cra_exit(struct crypto_tfm *tfm) 1390 { 1391 struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm); 1392 1393 crypto_free_shash(tctx->fallback); 1394 tctx->fallback = NULL; 1395 1396 if (tctx->flags & BIT(FLAGS_HMAC)) { 1397 struct omap_sham_hmac_ctx *bctx = tctx->base; 1398 crypto_free_shash(bctx->shash); 1399 } 1400 } 1401 1402 static int omap_sham_export(struct ahash_request *req, void *out) 1403 { 1404 struct omap_sham_reqctx *rctx = ahash_request_ctx(req); 1405 1406 memcpy(out, rctx, sizeof(*rctx) + rctx->bufcnt); 1407 1408 return 0; 1409 } 1410 1411 static int omap_sham_import(struct ahash_request *req, const void *in) 1412 { 1413 struct omap_sham_reqctx *rctx = ahash_request_ctx(req); 1414 const struct omap_sham_reqctx *ctx_in = in; 1415 1416 memcpy(rctx, in, sizeof(*rctx) + ctx_in->bufcnt); 1417 1418 return 0; 1419 } 1420 1421 static struct ahash_engine_alg algs_sha1_md5[] = { 1422 { 1423 .base.init = omap_sham_init, 1424 .base.update = omap_sham_update, 1425 .base.final = omap_sham_final, 1426 .base.finup = omap_sham_finup, 1427 .base.digest = omap_sham_digest, 1428 .base.halg.digestsize = SHA1_DIGEST_SIZE, 1429 .base.halg.base = { 1430 .cra_name = "sha1", 1431 .cra_driver_name = "omap-sha1", 1432 .cra_priority = 400, 1433 .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1434 CRYPTO_ALG_ASYNC | 1435 CRYPTO_ALG_NEED_FALLBACK, 1436 .cra_blocksize = SHA1_BLOCK_SIZE, 1437 .cra_ctxsize = sizeof(struct omap_sham_ctx), 1438 .cra_module = THIS_MODULE, 1439 .cra_init = omap_sham_cra_init, 1440 .cra_exit = omap_sham_cra_exit, 1441 }, 1442 .op.do_one_request = omap_sham_hash_one_req, 1443 }, 1444 { 1445 .base.init = omap_sham_init, 1446 .base.update = omap_sham_update, 1447 .base.final = omap_sham_final, 1448 .base.finup = omap_sham_finup, 1449 .base.digest = omap_sham_digest, 1450 .base.halg.digestsize = MD5_DIGEST_SIZE, 1451 .base.halg.base = { 1452 .cra_name = "md5", 1453 .cra_driver_name = "omap-md5", 1454 .cra_priority = 400, 1455 .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1456 CRYPTO_ALG_ASYNC | 1457 CRYPTO_ALG_NEED_FALLBACK, 1458 .cra_blocksize = SHA1_BLOCK_SIZE, 1459 .cra_ctxsize = sizeof(struct omap_sham_ctx), 1460 .cra_module = THIS_MODULE, 1461 .cra_init = omap_sham_cra_init, 1462 .cra_exit = omap_sham_cra_exit, 1463 }, 1464 .op.do_one_request = omap_sham_hash_one_req, 1465 }, 1466 { 1467 .base.init = omap_sham_init, 1468 .base.update = omap_sham_update, 1469 .base.final = omap_sham_final, 1470 .base.finup = omap_sham_finup, 1471 .base.digest = omap_sham_digest, 1472 .base.setkey = omap_sham_setkey, 1473 .base.halg.digestsize = SHA1_DIGEST_SIZE, 1474 .base.halg.base = { 1475 .cra_name = "hmac(sha1)", 1476 .cra_driver_name = "omap-hmac-sha1", 1477 .cra_priority = 400, 1478 .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1479 CRYPTO_ALG_ASYNC | 1480 CRYPTO_ALG_NEED_FALLBACK, 1481 .cra_blocksize = SHA1_BLOCK_SIZE, 1482 .cra_ctxsize = sizeof(struct omap_sham_ctx) + 1483 sizeof(struct omap_sham_hmac_ctx), 1484 .cra_module = THIS_MODULE, 1485 .cra_init = omap_sham_cra_sha1_init, 1486 .cra_exit = omap_sham_cra_exit, 1487 }, 1488 .op.do_one_request = omap_sham_hash_one_req, 1489 }, 1490 { 1491 .base.init = omap_sham_init, 1492 .base.update = omap_sham_update, 1493 .base.final = omap_sham_final, 1494 .base.finup = omap_sham_finup, 1495 .base.digest = omap_sham_digest, 1496 .base.setkey = omap_sham_setkey, 1497 .base.halg.digestsize = MD5_DIGEST_SIZE, 1498 .base.halg.base = { 1499 .cra_name = "hmac(md5)", 1500 .cra_driver_name = "omap-hmac-md5", 1501 .cra_priority = 400, 1502 .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1503 CRYPTO_ALG_ASYNC | 1504 CRYPTO_ALG_NEED_FALLBACK, 1505 .cra_blocksize = SHA1_BLOCK_SIZE, 1506 .cra_ctxsize = sizeof(struct omap_sham_ctx) + 1507 sizeof(struct omap_sham_hmac_ctx), 1508 .cra_module = THIS_MODULE, 1509 .cra_init = omap_sham_cra_md5_init, 1510 .cra_exit = omap_sham_cra_exit, 1511 }, 1512 .op.do_one_request = omap_sham_hash_one_req, 1513 } 1514 }; 1515 1516 /* OMAP4 has some algs in addition to what OMAP2 has */ 1517 static struct ahash_engine_alg algs_sha224_sha256[] = { 1518 { 1519 .base.init = omap_sham_init, 1520 .base.update = omap_sham_update, 1521 .base.final = omap_sham_final, 1522 .base.finup = omap_sham_finup, 1523 .base.digest = omap_sham_digest, 1524 .base.halg.digestsize = SHA224_DIGEST_SIZE, 1525 .base.halg.base = { 1526 .cra_name = "sha224", 1527 .cra_driver_name = "omap-sha224", 1528 .cra_priority = 400, 1529 .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1530 CRYPTO_ALG_ASYNC | 1531 CRYPTO_ALG_NEED_FALLBACK, 1532 .cra_blocksize = SHA224_BLOCK_SIZE, 1533 .cra_ctxsize = sizeof(struct omap_sham_ctx), 1534 .cra_module = THIS_MODULE, 1535 .cra_init = omap_sham_cra_init, 1536 .cra_exit = omap_sham_cra_exit, 1537 }, 1538 .op.do_one_request = omap_sham_hash_one_req, 1539 }, 1540 { 1541 .base.init = omap_sham_init, 1542 .base.update = omap_sham_update, 1543 .base.final = omap_sham_final, 1544 .base.finup = omap_sham_finup, 1545 .base.digest = omap_sham_digest, 1546 .base.halg.digestsize = SHA256_DIGEST_SIZE, 1547 .base.halg.base = { 1548 .cra_name = "sha256", 1549 .cra_driver_name = "omap-sha256", 1550 .cra_priority = 400, 1551 .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1552 CRYPTO_ALG_ASYNC | 1553 CRYPTO_ALG_NEED_FALLBACK, 1554 .cra_blocksize = SHA256_BLOCK_SIZE, 1555 .cra_ctxsize = sizeof(struct omap_sham_ctx), 1556 .cra_module = THIS_MODULE, 1557 .cra_init = omap_sham_cra_init, 1558 .cra_exit = omap_sham_cra_exit, 1559 }, 1560 .op.do_one_request = omap_sham_hash_one_req, 1561 }, 1562 { 1563 .base.init = omap_sham_init, 1564 .base.update = omap_sham_update, 1565 .base.final = omap_sham_final, 1566 .base.finup = omap_sham_finup, 1567 .base.digest = omap_sham_digest, 1568 .base.setkey = omap_sham_setkey, 1569 .base.halg.digestsize = SHA224_DIGEST_SIZE, 1570 .base.halg.base = { 1571 .cra_name = "hmac(sha224)", 1572 .cra_driver_name = "omap-hmac-sha224", 1573 .cra_priority = 400, 1574 .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1575 CRYPTO_ALG_ASYNC | 1576 CRYPTO_ALG_NEED_FALLBACK, 1577 .cra_blocksize = SHA224_BLOCK_SIZE, 1578 .cra_ctxsize = sizeof(struct omap_sham_ctx) + 1579 sizeof(struct omap_sham_hmac_ctx), 1580 .cra_module = THIS_MODULE, 1581 .cra_init = omap_sham_cra_sha224_init, 1582 .cra_exit = omap_sham_cra_exit, 1583 }, 1584 .op.do_one_request = omap_sham_hash_one_req, 1585 }, 1586 { 1587 .base.init = omap_sham_init, 1588 .base.update = omap_sham_update, 1589 .base.final = omap_sham_final, 1590 .base.finup = omap_sham_finup, 1591 .base.digest = omap_sham_digest, 1592 .base.setkey = omap_sham_setkey, 1593 .base.halg.digestsize = SHA256_DIGEST_SIZE, 1594 .base.halg.base = { 1595 .cra_name = "hmac(sha256)", 1596 .cra_driver_name = "omap-hmac-sha256", 1597 .cra_priority = 400, 1598 .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1599 CRYPTO_ALG_ASYNC | 1600 CRYPTO_ALG_NEED_FALLBACK, 1601 .cra_blocksize = SHA256_BLOCK_SIZE, 1602 .cra_ctxsize = sizeof(struct omap_sham_ctx) + 1603 sizeof(struct omap_sham_hmac_ctx), 1604 .cra_module = THIS_MODULE, 1605 .cra_init = omap_sham_cra_sha256_init, 1606 .cra_exit = omap_sham_cra_exit, 1607 }, 1608 .op.do_one_request = omap_sham_hash_one_req, 1609 }, 1610 }; 1611 1612 static struct ahash_engine_alg algs_sha384_sha512[] = { 1613 { 1614 .base.init = omap_sham_init, 1615 .base.update = omap_sham_update, 1616 .base.final = omap_sham_final, 1617 .base.finup = omap_sham_finup, 1618 .base.digest = omap_sham_digest, 1619 .base.halg.digestsize = SHA384_DIGEST_SIZE, 1620 .base.halg.base = { 1621 .cra_name = "sha384", 1622 .cra_driver_name = "omap-sha384", 1623 .cra_priority = 400, 1624 .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1625 CRYPTO_ALG_ASYNC | 1626 CRYPTO_ALG_NEED_FALLBACK, 1627 .cra_blocksize = SHA384_BLOCK_SIZE, 1628 .cra_ctxsize = sizeof(struct omap_sham_ctx), 1629 .cra_module = THIS_MODULE, 1630 .cra_init = omap_sham_cra_init, 1631 .cra_exit = omap_sham_cra_exit, 1632 }, 1633 .op.do_one_request = omap_sham_hash_one_req, 1634 }, 1635 { 1636 .base.init = omap_sham_init, 1637 .base.update = omap_sham_update, 1638 .base.final = omap_sham_final, 1639 .base.finup = omap_sham_finup, 1640 .base.digest = omap_sham_digest, 1641 .base.halg.digestsize = SHA512_DIGEST_SIZE, 1642 .base.halg.base = { 1643 .cra_name = "sha512", 1644 .cra_driver_name = "omap-sha512", 1645 .cra_priority = 400, 1646 .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1647 CRYPTO_ALG_ASYNC | 1648 CRYPTO_ALG_NEED_FALLBACK, 1649 .cra_blocksize = SHA512_BLOCK_SIZE, 1650 .cra_ctxsize = sizeof(struct omap_sham_ctx), 1651 .cra_module = THIS_MODULE, 1652 .cra_init = omap_sham_cra_init, 1653 .cra_exit = omap_sham_cra_exit, 1654 }, 1655 .op.do_one_request = omap_sham_hash_one_req, 1656 }, 1657 { 1658 .base.init = omap_sham_init, 1659 .base.update = omap_sham_update, 1660 .base.final = omap_sham_final, 1661 .base.finup = omap_sham_finup, 1662 .base.digest = omap_sham_digest, 1663 .base.setkey = omap_sham_setkey, 1664 .base.halg.digestsize = SHA384_DIGEST_SIZE, 1665 .base.halg.base = { 1666 .cra_name = "hmac(sha384)", 1667 .cra_driver_name = "omap-hmac-sha384", 1668 .cra_priority = 400, 1669 .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1670 CRYPTO_ALG_ASYNC | 1671 CRYPTO_ALG_NEED_FALLBACK, 1672 .cra_blocksize = SHA384_BLOCK_SIZE, 1673 .cra_ctxsize = sizeof(struct omap_sham_ctx) + 1674 sizeof(struct omap_sham_hmac_ctx), 1675 .cra_module = THIS_MODULE, 1676 .cra_init = omap_sham_cra_sha384_init, 1677 .cra_exit = omap_sham_cra_exit, 1678 }, 1679 .op.do_one_request = omap_sham_hash_one_req, 1680 }, 1681 { 1682 .base.init = omap_sham_init, 1683 .base.update = omap_sham_update, 1684 .base.final = omap_sham_final, 1685 .base.finup = omap_sham_finup, 1686 .base.digest = omap_sham_digest, 1687 .base.setkey = omap_sham_setkey, 1688 .base.halg.digestsize = SHA512_DIGEST_SIZE, 1689 .base.halg.base = { 1690 .cra_name = "hmac(sha512)", 1691 .cra_driver_name = "omap-hmac-sha512", 1692 .cra_priority = 400, 1693 .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1694 CRYPTO_ALG_ASYNC | 1695 CRYPTO_ALG_NEED_FALLBACK, 1696 .cra_blocksize = SHA512_BLOCK_SIZE, 1697 .cra_ctxsize = sizeof(struct omap_sham_ctx) + 1698 sizeof(struct omap_sham_hmac_ctx), 1699 .cra_module = THIS_MODULE, 1700 .cra_init = omap_sham_cra_sha512_init, 1701 .cra_exit = omap_sham_cra_exit, 1702 }, 1703 .op.do_one_request = omap_sham_hash_one_req, 1704 }, 1705 }; 1706 1707 static void omap_sham_done_task(struct work_struct *t) 1708 { 1709 struct omap_sham_dev *dd = from_work(dd, t, done_task); 1710 int err = 0; 1711 1712 dev_dbg(dd->dev, "%s: flags=%lx\n", __func__, dd->flags); 1713 1714 if (test_bit(FLAGS_CPU, &dd->flags)) { 1715 if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) 1716 goto finish; 1717 } else if (test_bit(FLAGS_DMA_READY, &dd->flags)) { 1718 if (test_bit(FLAGS_DMA_ACTIVE, &dd->flags)) { 1719 omap_sham_update_dma_stop(dd); 1720 if (dd->err) { 1721 err = dd->err; 1722 goto finish; 1723 } 1724 } 1725 if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) { 1726 /* hash or semi-hash ready */ 1727 clear_bit(FLAGS_DMA_READY, &dd->flags); 1728 goto finish; 1729 } 1730 } 1731 1732 return; 1733 1734 finish: 1735 dev_dbg(dd->dev, "update done: err: %d\n", err); 1736 /* finish curent request */ 1737 omap_sham_finish_req(dd->req, err); 1738 } 1739 1740 static irqreturn_t omap_sham_irq_common(struct omap_sham_dev *dd) 1741 { 1742 set_bit(FLAGS_OUTPUT_READY, &dd->flags); 1743 queue_work(system_bh_wq, &dd->done_task); 1744 1745 return IRQ_HANDLED; 1746 } 1747 1748 static irqreturn_t omap_sham_irq_omap2(int irq, void *dev_id) 1749 { 1750 struct omap_sham_dev *dd = dev_id; 1751 1752 if (unlikely(test_bit(FLAGS_FINAL, &dd->flags))) 1753 /* final -> allow device to go to power-saving mode */ 1754 omap_sham_write_mask(dd, SHA_REG_CTRL, 0, SHA_REG_CTRL_LENGTH); 1755 1756 omap_sham_write_mask(dd, SHA_REG_CTRL, SHA_REG_CTRL_OUTPUT_READY, 1757 SHA_REG_CTRL_OUTPUT_READY); 1758 omap_sham_read(dd, SHA_REG_CTRL); 1759 1760 return omap_sham_irq_common(dd); 1761 } 1762 1763 static irqreturn_t omap_sham_irq_omap4(int irq, void *dev_id) 1764 { 1765 struct omap_sham_dev *dd = dev_id; 1766 1767 omap_sham_write_mask(dd, SHA_REG_MASK(dd), 0, SHA_REG_MASK_IT_EN); 1768 1769 return omap_sham_irq_common(dd); 1770 } 1771 1772 static struct omap_sham_algs_info omap_sham_algs_info_omap2[] = { 1773 { 1774 .algs_list = algs_sha1_md5, 1775 .size = ARRAY_SIZE(algs_sha1_md5), 1776 }, 1777 }; 1778 1779 static const struct omap_sham_pdata omap_sham_pdata_omap2 = { 1780 .algs_info = omap_sham_algs_info_omap2, 1781 .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap2), 1782 .flags = BIT(FLAGS_BE32_SHA1), 1783 .digest_size = SHA1_DIGEST_SIZE, 1784 .copy_hash = omap_sham_copy_hash_omap2, 1785 .write_ctrl = omap_sham_write_ctrl_omap2, 1786 .trigger = omap_sham_trigger_omap2, 1787 .poll_irq = omap_sham_poll_irq_omap2, 1788 .intr_hdlr = omap_sham_irq_omap2, 1789 .idigest_ofs = 0x00, 1790 .din_ofs = 0x1c, 1791 .digcnt_ofs = 0x14, 1792 .rev_ofs = 0x5c, 1793 .mask_ofs = 0x60, 1794 .sysstatus_ofs = 0x64, 1795 .major_mask = 0xf0, 1796 .major_shift = 4, 1797 .minor_mask = 0x0f, 1798 .minor_shift = 0, 1799 }; 1800 1801 #ifdef CONFIG_OF 1802 static struct omap_sham_algs_info omap_sham_algs_info_omap4[] = { 1803 { 1804 .algs_list = algs_sha1_md5, 1805 .size = ARRAY_SIZE(algs_sha1_md5), 1806 }, 1807 { 1808 .algs_list = algs_sha224_sha256, 1809 .size = ARRAY_SIZE(algs_sha224_sha256), 1810 }, 1811 }; 1812 1813 static const struct omap_sham_pdata omap_sham_pdata_omap4 = { 1814 .algs_info = omap_sham_algs_info_omap4, 1815 .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap4), 1816 .flags = BIT(FLAGS_AUTO_XOR), 1817 .digest_size = SHA256_DIGEST_SIZE, 1818 .copy_hash = omap_sham_copy_hash_omap4, 1819 .write_ctrl = omap_sham_write_ctrl_omap4, 1820 .trigger = omap_sham_trigger_omap4, 1821 .poll_irq = omap_sham_poll_irq_omap4, 1822 .intr_hdlr = omap_sham_irq_omap4, 1823 .idigest_ofs = 0x020, 1824 .odigest_ofs = 0x0, 1825 .din_ofs = 0x080, 1826 .digcnt_ofs = 0x040, 1827 .rev_ofs = 0x100, 1828 .mask_ofs = 0x110, 1829 .sysstatus_ofs = 0x114, 1830 .mode_ofs = 0x44, 1831 .length_ofs = 0x48, 1832 .major_mask = 0x0700, 1833 .major_shift = 8, 1834 .minor_mask = 0x003f, 1835 .minor_shift = 0, 1836 }; 1837 1838 static struct omap_sham_algs_info omap_sham_algs_info_omap5[] = { 1839 { 1840 .algs_list = algs_sha1_md5, 1841 .size = ARRAY_SIZE(algs_sha1_md5), 1842 }, 1843 { 1844 .algs_list = algs_sha224_sha256, 1845 .size = ARRAY_SIZE(algs_sha224_sha256), 1846 }, 1847 { 1848 .algs_list = algs_sha384_sha512, 1849 .size = ARRAY_SIZE(algs_sha384_sha512), 1850 }, 1851 }; 1852 1853 static const struct omap_sham_pdata omap_sham_pdata_omap5 = { 1854 .algs_info = omap_sham_algs_info_omap5, 1855 .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap5), 1856 .flags = BIT(FLAGS_AUTO_XOR), 1857 .digest_size = SHA512_DIGEST_SIZE, 1858 .copy_hash = omap_sham_copy_hash_omap4, 1859 .write_ctrl = omap_sham_write_ctrl_omap4, 1860 .trigger = omap_sham_trigger_omap4, 1861 .poll_irq = omap_sham_poll_irq_omap4, 1862 .intr_hdlr = omap_sham_irq_omap4, 1863 .idigest_ofs = 0x240, 1864 .odigest_ofs = 0x200, 1865 .din_ofs = 0x080, 1866 .digcnt_ofs = 0x280, 1867 .rev_ofs = 0x100, 1868 .mask_ofs = 0x110, 1869 .sysstatus_ofs = 0x114, 1870 .mode_ofs = 0x284, 1871 .length_ofs = 0x288, 1872 .major_mask = 0x0700, 1873 .major_shift = 8, 1874 .minor_mask = 0x003f, 1875 .minor_shift = 0, 1876 }; 1877 1878 static const struct of_device_id omap_sham_of_match[] = { 1879 { 1880 .compatible = "ti,omap2-sham", 1881 .data = &omap_sham_pdata_omap2, 1882 }, 1883 { 1884 .compatible = "ti,omap3-sham", 1885 .data = &omap_sham_pdata_omap2, 1886 }, 1887 { 1888 .compatible = "ti,omap4-sham", 1889 .data = &omap_sham_pdata_omap4, 1890 }, 1891 { 1892 .compatible = "ti,omap5-sham", 1893 .data = &omap_sham_pdata_omap5, 1894 }, 1895 {}, 1896 }; 1897 MODULE_DEVICE_TABLE(of, omap_sham_of_match); 1898 1899 static int omap_sham_get_res_of(struct omap_sham_dev *dd, 1900 struct device *dev, struct resource *res) 1901 { 1902 struct device_node *node = dev->of_node; 1903 int err = 0; 1904 1905 dd->pdata = of_device_get_match_data(dev); 1906 if (!dd->pdata) { 1907 dev_err(dev, "no compatible OF match\n"); 1908 err = -EINVAL; 1909 goto err; 1910 } 1911 1912 err = of_address_to_resource(node, 0, res); 1913 if (err < 0) { 1914 dev_err(dev, "can't translate OF node address\n"); 1915 err = -EINVAL; 1916 goto err; 1917 } 1918 1919 dd->irq = irq_of_parse_and_map(node, 0); 1920 if (!dd->irq) { 1921 dev_err(dev, "can't translate OF irq value\n"); 1922 err = -EINVAL; 1923 goto err; 1924 } 1925 1926 err: 1927 return err; 1928 } 1929 #else 1930 static const struct of_device_id omap_sham_of_match[] = { 1931 {}, 1932 }; 1933 1934 static int omap_sham_get_res_of(struct omap_sham_dev *dd, 1935 struct device *dev, struct resource *res) 1936 { 1937 return -EINVAL; 1938 } 1939 #endif 1940 1941 static int omap_sham_get_res_pdev(struct omap_sham_dev *dd, 1942 struct platform_device *pdev, struct resource *res) 1943 { 1944 struct device *dev = &pdev->dev; 1945 struct resource *r; 1946 int err = 0; 1947 1948 /* Get the base address */ 1949 r = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1950 if (!r) { 1951 dev_err(dev, "no MEM resource info\n"); 1952 err = -ENODEV; 1953 goto err; 1954 } 1955 memcpy(res, r, sizeof(*res)); 1956 1957 /* Get the IRQ */ 1958 dd->irq = platform_get_irq(pdev, 0); 1959 if (dd->irq < 0) { 1960 err = dd->irq; 1961 goto err; 1962 } 1963 1964 /* Only OMAP2/3 can be non-DT */ 1965 dd->pdata = &omap_sham_pdata_omap2; 1966 1967 err: 1968 return err; 1969 } 1970 1971 static ssize_t fallback_show(struct device *dev, struct device_attribute *attr, 1972 char *buf) 1973 { 1974 struct omap_sham_dev *dd = dev_get_drvdata(dev); 1975 1976 return sprintf(buf, "%d\n", dd->fallback_sz); 1977 } 1978 1979 static ssize_t fallback_store(struct device *dev, struct device_attribute *attr, 1980 const char *buf, size_t size) 1981 { 1982 struct omap_sham_dev *dd = dev_get_drvdata(dev); 1983 ssize_t status; 1984 long value; 1985 1986 status = kstrtol(buf, 0, &value); 1987 if (status) 1988 return status; 1989 1990 /* HW accelerator only works with buffers > 9 */ 1991 if (value < 9) { 1992 dev_err(dev, "minimum fallback size 9\n"); 1993 return -EINVAL; 1994 } 1995 1996 dd->fallback_sz = value; 1997 1998 return size; 1999 } 2000 2001 static ssize_t queue_len_show(struct device *dev, struct device_attribute *attr, 2002 char *buf) 2003 { 2004 struct omap_sham_dev *dd = dev_get_drvdata(dev); 2005 2006 return sprintf(buf, "%d\n", dd->queue.max_qlen); 2007 } 2008 2009 static ssize_t queue_len_store(struct device *dev, 2010 struct device_attribute *attr, const char *buf, 2011 size_t size) 2012 { 2013 struct omap_sham_dev *dd = dev_get_drvdata(dev); 2014 ssize_t status; 2015 long value; 2016 2017 status = kstrtol(buf, 0, &value); 2018 if (status) 2019 return status; 2020 2021 if (value < 1) 2022 return -EINVAL; 2023 2024 /* 2025 * Changing the queue size in fly is safe, if size becomes smaller 2026 * than current size, it will just not accept new entries until 2027 * it has shrank enough. 2028 */ 2029 dd->queue.max_qlen = value; 2030 2031 return size; 2032 } 2033 2034 static DEVICE_ATTR_RW(queue_len); 2035 static DEVICE_ATTR_RW(fallback); 2036 2037 static struct attribute *omap_sham_attrs[] = { 2038 &dev_attr_queue_len.attr, 2039 &dev_attr_fallback.attr, 2040 NULL, 2041 }; 2042 ATTRIBUTE_GROUPS(omap_sham); 2043 2044 static int omap_sham_probe(struct platform_device *pdev) 2045 { 2046 struct omap_sham_dev *dd; 2047 struct device *dev = &pdev->dev; 2048 struct resource res; 2049 dma_cap_mask_t mask; 2050 int err, i, j; 2051 u32 rev; 2052 2053 dd = devm_kzalloc(dev, sizeof(struct omap_sham_dev), GFP_KERNEL); 2054 if (dd == NULL) { 2055 dev_err(dev, "unable to alloc data struct.\n"); 2056 err = -ENOMEM; 2057 goto data_err; 2058 } 2059 dd->dev = dev; 2060 platform_set_drvdata(pdev, dd); 2061 2062 INIT_LIST_HEAD(&dd->list); 2063 INIT_WORK(&dd->done_task, omap_sham_done_task); 2064 crypto_init_queue(&dd->queue, OMAP_SHAM_QUEUE_LENGTH); 2065 2066 err = (dev->of_node) ? omap_sham_get_res_of(dd, dev, &res) : 2067 omap_sham_get_res_pdev(dd, pdev, &res); 2068 if (err) 2069 goto data_err; 2070 2071 dd->io_base = devm_ioremap_resource(dev, &res); 2072 if (IS_ERR(dd->io_base)) { 2073 err = PTR_ERR(dd->io_base); 2074 goto data_err; 2075 } 2076 dd->phys_base = res.start; 2077 2078 err = devm_request_irq(dev, dd->irq, dd->pdata->intr_hdlr, 2079 IRQF_TRIGGER_NONE, dev_name(dev), dd); 2080 if (err) { 2081 dev_err(dev, "unable to request irq %d, err = %d\n", 2082 dd->irq, err); 2083 goto data_err; 2084 } 2085 2086 dma_cap_zero(mask); 2087 dma_cap_set(DMA_SLAVE, mask); 2088 2089 dd->dma_lch = dma_request_chan(dev, "rx"); 2090 if (IS_ERR(dd->dma_lch)) { 2091 err = PTR_ERR(dd->dma_lch); 2092 if (err == -EPROBE_DEFER) 2093 goto data_err; 2094 2095 dd->polling_mode = 1; 2096 dev_dbg(dev, "using polling mode instead of dma\n"); 2097 } 2098 2099 dd->flags |= dd->pdata->flags; 2100 sham.flags |= dd->pdata->flags; 2101 2102 pm_runtime_use_autosuspend(dev); 2103 pm_runtime_set_autosuspend_delay(dev, DEFAULT_AUTOSUSPEND_DELAY); 2104 2105 dd->fallback_sz = OMAP_SHA_DMA_THRESHOLD; 2106 2107 pm_runtime_enable(dev); 2108 2109 err = pm_runtime_resume_and_get(dev); 2110 if (err < 0) { 2111 dev_err(dev, "failed to get sync: %d\n", err); 2112 goto err_pm; 2113 } 2114 2115 rev = omap_sham_read(dd, SHA_REG_REV(dd)); 2116 pm_runtime_put_sync(&pdev->dev); 2117 2118 dev_info(dev, "hw accel on OMAP rev %u.%u\n", 2119 (rev & dd->pdata->major_mask) >> dd->pdata->major_shift, 2120 (rev & dd->pdata->minor_mask) >> dd->pdata->minor_shift); 2121 2122 spin_lock_bh(&sham.lock); 2123 list_add_tail(&dd->list, &sham.dev_list); 2124 spin_unlock_bh(&sham.lock); 2125 2126 dd->engine = crypto_engine_alloc_init(dev, 1); 2127 if (!dd->engine) { 2128 err = -ENOMEM; 2129 goto err_engine; 2130 } 2131 2132 err = crypto_engine_start(dd->engine); 2133 if (err) 2134 goto err_engine_start; 2135 2136 for (i = 0; i < dd->pdata->algs_info_size; i++) { 2137 if (dd->pdata->algs_info[i].registered) 2138 break; 2139 2140 for (j = 0; j < dd->pdata->algs_info[i].size; j++) { 2141 struct ahash_engine_alg *ealg; 2142 struct ahash_alg *alg; 2143 2144 ealg = &dd->pdata->algs_info[i].algs_list[j]; 2145 alg = &ealg->base; 2146 alg->export = omap_sham_export; 2147 alg->import = omap_sham_import; 2148 alg->halg.statesize = sizeof(struct omap_sham_reqctx) + 2149 BUFLEN; 2150 err = crypto_engine_register_ahash(ealg); 2151 if (err) 2152 goto err_algs; 2153 2154 dd->pdata->algs_info[i].registered++; 2155 } 2156 } 2157 2158 return 0; 2159 2160 err_algs: 2161 for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) 2162 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) 2163 crypto_engine_unregister_ahash( 2164 &dd->pdata->algs_info[i].algs_list[j]); 2165 err_engine_start: 2166 crypto_engine_exit(dd->engine); 2167 err_engine: 2168 spin_lock_bh(&sham.lock); 2169 list_del(&dd->list); 2170 spin_unlock_bh(&sham.lock); 2171 err_pm: 2172 pm_runtime_dont_use_autosuspend(dev); 2173 pm_runtime_disable(dev); 2174 if (!dd->polling_mode) 2175 dma_release_channel(dd->dma_lch); 2176 data_err: 2177 dev_err(dev, "initialization failed.\n"); 2178 2179 return err; 2180 } 2181 2182 static void omap_sham_remove(struct platform_device *pdev) 2183 { 2184 struct omap_sham_dev *dd; 2185 int i, j; 2186 2187 dd = platform_get_drvdata(pdev); 2188 2189 spin_lock_bh(&sham.lock); 2190 list_del(&dd->list); 2191 spin_unlock_bh(&sham.lock); 2192 for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) 2193 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) { 2194 crypto_engine_unregister_ahash( 2195 &dd->pdata->algs_info[i].algs_list[j]); 2196 dd->pdata->algs_info[i].registered--; 2197 } 2198 cancel_work_sync(&dd->done_task); 2199 pm_runtime_dont_use_autosuspend(&pdev->dev); 2200 pm_runtime_disable(&pdev->dev); 2201 2202 if (!dd->polling_mode) 2203 dma_release_channel(dd->dma_lch); 2204 } 2205 2206 static struct platform_driver omap_sham_driver = { 2207 .probe = omap_sham_probe, 2208 .remove = omap_sham_remove, 2209 .driver = { 2210 .name = "omap-sham", 2211 .of_match_table = omap_sham_of_match, 2212 .dev_groups = omap_sham_groups, 2213 }, 2214 }; 2215 2216 module_platform_driver(omap_sham_driver); 2217 2218 MODULE_DESCRIPTION("OMAP SHA1/MD5 hw acceleration support."); 2219 MODULE_LICENSE("GPL v2"); 2220 MODULE_AUTHOR("Dmitry Kasatkin"); 2221 MODULE_ALIAS("platform:omap-sham"); 2222