1 /* 2 * This file is part of the Chelsio T6 Crypto driver for Linux. 3 * 4 * Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 * 34 * Written and Maintained by: 35 * Manoj Malviya (manojmalviya@chelsio.com) 36 * Atul Gupta (atul.gupta@chelsio.com) 37 * Jitendra Lulla (jlulla@chelsio.com) 38 * Yeshaswi M R Gowda (yeshaswi@chelsio.com) 39 * Harsh Jain (harsh@chelsio.com) 40 */ 41 42 #define pr_fmt(fmt) "chcr:" fmt 43 44 #include <linux/kernel.h> 45 #include <linux/module.h> 46 #include <linux/crypto.h> 47 #include <linux/cryptohash.h> 48 #include <linux/skbuff.h> 49 #include <linux/rtnetlink.h> 50 #include <linux/highmem.h> 51 #include <linux/scatterlist.h> 52 53 #include <crypto/aes.h> 54 #include <crypto/algapi.h> 55 #include <crypto/hash.h> 56 #include <crypto/gcm.h> 57 #include <crypto/sha.h> 58 #include <crypto/authenc.h> 59 #include <crypto/ctr.h> 60 #include <crypto/gf128mul.h> 61 #include <crypto/internal/aead.h> 62 #include <crypto/null.h> 63 #include <crypto/internal/skcipher.h> 64 #include <crypto/aead.h> 65 #include <crypto/scatterwalk.h> 66 #include <crypto/internal/hash.h> 67 68 #include "t4fw_api.h" 69 #include "t4_msg.h" 70 #include "chcr_core.h" 71 #include "chcr_algo.h" 72 #include "chcr_crypto.h" 73 74 #define IV AES_BLOCK_SIZE 75 76 static unsigned int sgl_ent_len[] = { 77 0, 0, 16, 24, 40, 48, 64, 72, 88, 78 96, 112, 120, 136, 144, 160, 168, 184, 79 192, 208, 216, 232, 240, 256, 264, 280, 80 288, 304, 312, 328, 336, 352, 360, 376 81 }; 82 83 static unsigned int dsgl_ent_len[] = { 84 0, 32, 32, 48, 48, 64, 64, 80, 80, 85 112, 112, 128, 128, 144, 144, 160, 160, 86 192, 192, 208, 208, 224, 224, 240, 240, 87 272, 272, 288, 288, 304, 304, 320, 320 88 }; 89 90 static u32 round_constant[11] = { 91 0x01000000, 0x02000000, 0x04000000, 0x08000000, 92 0x10000000, 0x20000000, 0x40000000, 0x80000000, 93 0x1B000000, 0x36000000, 0x6C000000 94 }; 95 96 static int chcr_handle_cipher_resp(struct skcipher_request *req, 97 unsigned char *input, int err); 98 99 static inline struct chcr_aead_ctx *AEAD_CTX(struct chcr_context *ctx) 100 { 101 return ctx->crypto_ctx->aeadctx; 102 } 103 104 static inline struct ablk_ctx *ABLK_CTX(struct chcr_context *ctx) 105 { 106 return ctx->crypto_ctx->ablkctx; 107 } 108 109 static inline struct hmac_ctx *HMAC_CTX(struct chcr_context *ctx) 110 { 111 return ctx->crypto_ctx->hmacctx; 112 } 113 114 static inline struct chcr_gcm_ctx *GCM_CTX(struct chcr_aead_ctx *gctx) 115 { 116 return gctx->ctx->gcm; 117 } 118 119 static inline struct chcr_authenc_ctx *AUTHENC_CTX(struct chcr_aead_ctx *gctx) 120 { 121 return gctx->ctx->authenc; 122 } 123 124 static inline struct uld_ctx *ULD_CTX(struct chcr_context *ctx) 125 { 126 return container_of(ctx->dev, struct uld_ctx, dev); 127 } 128 129 static inline int is_ofld_imm(const struct sk_buff *skb) 130 { 131 return (skb->len <= SGE_MAX_WR_LEN); 132 } 133 134 static inline void chcr_init_hctx_per_wr(struct chcr_ahash_req_ctx *reqctx) 135 { 136 memset(&reqctx->hctx_wr, 0, sizeof(struct chcr_hctx_per_wr)); 137 } 138 139 static int sg_nents_xlen(struct scatterlist *sg, unsigned int reqlen, 140 unsigned int entlen, 141 unsigned int skip) 142 { 143 int nents = 0; 144 unsigned int less; 145 unsigned int skip_len = 0; 146 147 while (sg && skip) { 148 if (sg_dma_len(sg) <= skip) { 149 skip -= sg_dma_len(sg); 150 skip_len = 0; 151 sg = sg_next(sg); 152 } else { 153 skip_len = skip; 154 skip = 0; 155 } 156 } 157 158 while (sg && reqlen) { 159 less = min(reqlen, sg_dma_len(sg) - skip_len); 160 nents += DIV_ROUND_UP(less, entlen); 161 reqlen -= less; 162 skip_len = 0; 163 sg = sg_next(sg); 164 } 165 return nents; 166 } 167 168 static inline int get_aead_subtype(struct crypto_aead *aead) 169 { 170 struct aead_alg *alg = crypto_aead_alg(aead); 171 struct chcr_alg_template *chcr_crypto_alg = 172 container_of(alg, struct chcr_alg_template, alg.aead); 173 return chcr_crypto_alg->type & CRYPTO_ALG_SUB_TYPE_MASK; 174 } 175 176 void chcr_verify_tag(struct aead_request *req, u8 *input, int *err) 177 { 178 u8 temp[SHA512_DIGEST_SIZE]; 179 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 180 int authsize = crypto_aead_authsize(tfm); 181 struct cpl_fw6_pld *fw6_pld; 182 int cmp = 0; 183 184 fw6_pld = (struct cpl_fw6_pld *)input; 185 if ((get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106) || 186 (get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_GCM)) { 187 cmp = crypto_memneq(&fw6_pld->data[2], (fw6_pld + 1), authsize); 188 } else { 189 190 sg_pcopy_to_buffer(req->src, sg_nents(req->src), temp, 191 authsize, req->assoclen + 192 req->cryptlen - authsize); 193 cmp = crypto_memneq(temp, (fw6_pld + 1), authsize); 194 } 195 if (cmp) 196 *err = -EBADMSG; 197 else 198 *err = 0; 199 } 200 201 static int chcr_inc_wrcount(struct chcr_dev *dev) 202 { 203 if (dev->state == CHCR_DETACH) 204 return 1; 205 atomic_inc(&dev->inflight); 206 return 0; 207 } 208 209 static inline void chcr_dec_wrcount(struct chcr_dev *dev) 210 { 211 atomic_dec(&dev->inflight); 212 } 213 214 static inline int chcr_handle_aead_resp(struct aead_request *req, 215 unsigned char *input, 216 int err) 217 { 218 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 219 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 220 struct chcr_dev *dev = a_ctx(tfm)->dev; 221 222 chcr_aead_common_exit(req); 223 if (reqctx->verify == VERIFY_SW) { 224 chcr_verify_tag(req, input, &err); 225 reqctx->verify = VERIFY_HW; 226 } 227 chcr_dec_wrcount(dev); 228 req->base.complete(&req->base, err); 229 230 return err; 231 } 232 233 static void get_aes_decrypt_key(unsigned char *dec_key, 234 const unsigned char *key, 235 unsigned int keylength) 236 { 237 u32 temp; 238 u32 w_ring[MAX_NK]; 239 int i, j, k; 240 u8 nr, nk; 241 242 switch (keylength) { 243 case AES_KEYLENGTH_128BIT: 244 nk = KEYLENGTH_4BYTES; 245 nr = NUMBER_OF_ROUNDS_10; 246 break; 247 case AES_KEYLENGTH_192BIT: 248 nk = KEYLENGTH_6BYTES; 249 nr = NUMBER_OF_ROUNDS_12; 250 break; 251 case AES_KEYLENGTH_256BIT: 252 nk = KEYLENGTH_8BYTES; 253 nr = NUMBER_OF_ROUNDS_14; 254 break; 255 default: 256 return; 257 } 258 for (i = 0; i < nk; i++) 259 w_ring[i] = be32_to_cpu(*(u32 *)&key[4 * i]); 260 261 i = 0; 262 temp = w_ring[nk - 1]; 263 while (i + nk < (nr + 1) * 4) { 264 if (!(i % nk)) { 265 /* RotWord(temp) */ 266 temp = (temp << 8) | (temp >> 24); 267 temp = aes_ks_subword(temp); 268 temp ^= round_constant[i / nk]; 269 } else if (nk == 8 && (i % 4 == 0)) { 270 temp = aes_ks_subword(temp); 271 } 272 w_ring[i % nk] ^= temp; 273 temp = w_ring[i % nk]; 274 i++; 275 } 276 i--; 277 for (k = 0, j = i % nk; k < nk; k++) { 278 *((u32 *)dec_key + k) = htonl(w_ring[j]); 279 j--; 280 if (j < 0) 281 j += nk; 282 } 283 } 284 285 static struct crypto_shash *chcr_alloc_shash(unsigned int ds) 286 { 287 struct crypto_shash *base_hash = ERR_PTR(-EINVAL); 288 289 switch (ds) { 290 case SHA1_DIGEST_SIZE: 291 base_hash = crypto_alloc_shash("sha1", 0, 0); 292 break; 293 case SHA224_DIGEST_SIZE: 294 base_hash = crypto_alloc_shash("sha224", 0, 0); 295 break; 296 case SHA256_DIGEST_SIZE: 297 base_hash = crypto_alloc_shash("sha256", 0, 0); 298 break; 299 case SHA384_DIGEST_SIZE: 300 base_hash = crypto_alloc_shash("sha384", 0, 0); 301 break; 302 case SHA512_DIGEST_SIZE: 303 base_hash = crypto_alloc_shash("sha512", 0, 0); 304 break; 305 } 306 307 return base_hash; 308 } 309 310 static int chcr_compute_partial_hash(struct shash_desc *desc, 311 char *iopad, char *result_hash, 312 int digest_size) 313 { 314 struct sha1_state sha1_st; 315 struct sha256_state sha256_st; 316 struct sha512_state sha512_st; 317 int error; 318 319 if (digest_size == SHA1_DIGEST_SIZE) { 320 error = crypto_shash_init(desc) ?: 321 crypto_shash_update(desc, iopad, SHA1_BLOCK_SIZE) ?: 322 crypto_shash_export(desc, (void *)&sha1_st); 323 memcpy(result_hash, sha1_st.state, SHA1_DIGEST_SIZE); 324 } else if (digest_size == SHA224_DIGEST_SIZE) { 325 error = crypto_shash_init(desc) ?: 326 crypto_shash_update(desc, iopad, SHA256_BLOCK_SIZE) ?: 327 crypto_shash_export(desc, (void *)&sha256_st); 328 memcpy(result_hash, sha256_st.state, SHA256_DIGEST_SIZE); 329 330 } else if (digest_size == SHA256_DIGEST_SIZE) { 331 error = crypto_shash_init(desc) ?: 332 crypto_shash_update(desc, iopad, SHA256_BLOCK_SIZE) ?: 333 crypto_shash_export(desc, (void *)&sha256_st); 334 memcpy(result_hash, sha256_st.state, SHA256_DIGEST_SIZE); 335 336 } else if (digest_size == SHA384_DIGEST_SIZE) { 337 error = crypto_shash_init(desc) ?: 338 crypto_shash_update(desc, iopad, SHA512_BLOCK_SIZE) ?: 339 crypto_shash_export(desc, (void *)&sha512_st); 340 memcpy(result_hash, sha512_st.state, SHA512_DIGEST_SIZE); 341 342 } else if (digest_size == SHA512_DIGEST_SIZE) { 343 error = crypto_shash_init(desc) ?: 344 crypto_shash_update(desc, iopad, SHA512_BLOCK_SIZE) ?: 345 crypto_shash_export(desc, (void *)&sha512_st); 346 memcpy(result_hash, sha512_st.state, SHA512_DIGEST_SIZE); 347 } else { 348 error = -EINVAL; 349 pr_err("Unknown digest size %d\n", digest_size); 350 } 351 return error; 352 } 353 354 static void chcr_change_order(char *buf, int ds) 355 { 356 int i; 357 358 if (ds == SHA512_DIGEST_SIZE) { 359 for (i = 0; i < (ds / sizeof(u64)); i++) 360 *((__be64 *)buf + i) = 361 cpu_to_be64(*((u64 *)buf + i)); 362 } else { 363 for (i = 0; i < (ds / sizeof(u32)); i++) 364 *((__be32 *)buf + i) = 365 cpu_to_be32(*((u32 *)buf + i)); 366 } 367 } 368 369 static inline int is_hmac(struct crypto_tfm *tfm) 370 { 371 struct crypto_alg *alg = tfm->__crt_alg; 372 struct chcr_alg_template *chcr_crypto_alg = 373 container_of(__crypto_ahash_alg(alg), struct chcr_alg_template, 374 alg.hash); 375 if (chcr_crypto_alg->type == CRYPTO_ALG_TYPE_HMAC) 376 return 1; 377 return 0; 378 } 379 380 static inline void dsgl_walk_init(struct dsgl_walk *walk, 381 struct cpl_rx_phys_dsgl *dsgl) 382 { 383 walk->dsgl = dsgl; 384 walk->nents = 0; 385 walk->to = (struct phys_sge_pairs *)(dsgl + 1); 386 } 387 388 static inline void dsgl_walk_end(struct dsgl_walk *walk, unsigned short qid, 389 int pci_chan_id) 390 { 391 struct cpl_rx_phys_dsgl *phys_cpl; 392 393 phys_cpl = walk->dsgl; 394 395 phys_cpl->op_to_tid = htonl(CPL_RX_PHYS_DSGL_OPCODE_V(CPL_RX_PHYS_DSGL) 396 | CPL_RX_PHYS_DSGL_ISRDMA_V(0)); 397 phys_cpl->pcirlxorder_to_noofsgentr = 398 htonl(CPL_RX_PHYS_DSGL_PCIRLXORDER_V(0) | 399 CPL_RX_PHYS_DSGL_PCINOSNOOP_V(0) | 400 CPL_RX_PHYS_DSGL_PCITPHNTENB_V(0) | 401 CPL_RX_PHYS_DSGL_PCITPHNT_V(0) | 402 CPL_RX_PHYS_DSGL_DCAID_V(0) | 403 CPL_RX_PHYS_DSGL_NOOFSGENTR_V(walk->nents)); 404 phys_cpl->rss_hdr_int.opcode = CPL_RX_PHYS_ADDR; 405 phys_cpl->rss_hdr_int.qid = htons(qid); 406 phys_cpl->rss_hdr_int.hash_val = 0; 407 phys_cpl->rss_hdr_int.channel = pci_chan_id; 408 } 409 410 static inline void dsgl_walk_add_page(struct dsgl_walk *walk, 411 size_t size, 412 dma_addr_t addr) 413 { 414 int j; 415 416 if (!size) 417 return; 418 j = walk->nents; 419 walk->to->len[j % 8] = htons(size); 420 walk->to->addr[j % 8] = cpu_to_be64(addr); 421 j++; 422 if ((j % 8) == 0) 423 walk->to++; 424 walk->nents = j; 425 } 426 427 static void dsgl_walk_add_sg(struct dsgl_walk *walk, 428 struct scatterlist *sg, 429 unsigned int slen, 430 unsigned int skip) 431 { 432 int skip_len = 0; 433 unsigned int left_size = slen, len = 0; 434 unsigned int j = walk->nents; 435 int offset, ent_len; 436 437 if (!slen) 438 return; 439 while (sg && skip) { 440 if (sg_dma_len(sg) <= skip) { 441 skip -= sg_dma_len(sg); 442 skip_len = 0; 443 sg = sg_next(sg); 444 } else { 445 skip_len = skip; 446 skip = 0; 447 } 448 } 449 450 while (left_size && sg) { 451 len = min_t(u32, left_size, sg_dma_len(sg) - skip_len); 452 offset = 0; 453 while (len) { 454 ent_len = min_t(u32, len, CHCR_DST_SG_SIZE); 455 walk->to->len[j % 8] = htons(ent_len); 456 walk->to->addr[j % 8] = cpu_to_be64(sg_dma_address(sg) + 457 offset + skip_len); 458 offset += ent_len; 459 len -= ent_len; 460 j++; 461 if ((j % 8) == 0) 462 walk->to++; 463 } 464 walk->last_sg = sg; 465 walk->last_sg_len = min_t(u32, left_size, sg_dma_len(sg) - 466 skip_len) + skip_len; 467 left_size -= min_t(u32, left_size, sg_dma_len(sg) - skip_len); 468 skip_len = 0; 469 sg = sg_next(sg); 470 } 471 walk->nents = j; 472 } 473 474 static inline void ulptx_walk_init(struct ulptx_walk *walk, 475 struct ulptx_sgl *ulp) 476 { 477 walk->sgl = ulp; 478 walk->nents = 0; 479 walk->pair_idx = 0; 480 walk->pair = ulp->sge; 481 walk->last_sg = NULL; 482 walk->last_sg_len = 0; 483 } 484 485 static inline void ulptx_walk_end(struct ulptx_walk *walk) 486 { 487 walk->sgl->cmd_nsge = htonl(ULPTX_CMD_V(ULP_TX_SC_DSGL) | 488 ULPTX_NSGE_V(walk->nents)); 489 } 490 491 492 static inline void ulptx_walk_add_page(struct ulptx_walk *walk, 493 size_t size, 494 dma_addr_t addr) 495 { 496 if (!size) 497 return; 498 499 if (walk->nents == 0) { 500 walk->sgl->len0 = cpu_to_be32(size); 501 walk->sgl->addr0 = cpu_to_be64(addr); 502 } else { 503 walk->pair->addr[walk->pair_idx] = cpu_to_be64(addr); 504 walk->pair->len[walk->pair_idx] = cpu_to_be32(size); 505 walk->pair_idx = !walk->pair_idx; 506 if (!walk->pair_idx) 507 walk->pair++; 508 } 509 walk->nents++; 510 } 511 512 static void ulptx_walk_add_sg(struct ulptx_walk *walk, 513 struct scatterlist *sg, 514 unsigned int len, 515 unsigned int skip) 516 { 517 int small; 518 int skip_len = 0; 519 unsigned int sgmin; 520 521 if (!len) 522 return; 523 while (sg && skip) { 524 if (sg_dma_len(sg) <= skip) { 525 skip -= sg_dma_len(sg); 526 skip_len = 0; 527 sg = sg_next(sg); 528 } else { 529 skip_len = skip; 530 skip = 0; 531 } 532 } 533 WARN(!sg, "SG should not be null here\n"); 534 if (sg && (walk->nents == 0)) { 535 small = min_t(unsigned int, sg_dma_len(sg) - skip_len, len); 536 sgmin = min_t(unsigned int, small, CHCR_SRC_SG_SIZE); 537 walk->sgl->len0 = cpu_to_be32(sgmin); 538 walk->sgl->addr0 = cpu_to_be64(sg_dma_address(sg) + skip_len); 539 walk->nents++; 540 len -= sgmin; 541 walk->last_sg = sg; 542 walk->last_sg_len = sgmin + skip_len; 543 skip_len += sgmin; 544 if (sg_dma_len(sg) == skip_len) { 545 sg = sg_next(sg); 546 skip_len = 0; 547 } 548 } 549 550 while (sg && len) { 551 small = min(sg_dma_len(sg) - skip_len, len); 552 sgmin = min_t(unsigned int, small, CHCR_SRC_SG_SIZE); 553 walk->pair->len[walk->pair_idx] = cpu_to_be32(sgmin); 554 walk->pair->addr[walk->pair_idx] = 555 cpu_to_be64(sg_dma_address(sg) + skip_len); 556 walk->pair_idx = !walk->pair_idx; 557 walk->nents++; 558 if (!walk->pair_idx) 559 walk->pair++; 560 len -= sgmin; 561 skip_len += sgmin; 562 walk->last_sg = sg; 563 walk->last_sg_len = skip_len; 564 if (sg_dma_len(sg) == skip_len) { 565 sg = sg_next(sg); 566 skip_len = 0; 567 } 568 } 569 } 570 571 static inline int get_cryptoalg_subtype(struct crypto_skcipher *tfm) 572 { 573 struct skcipher_alg *alg = crypto_skcipher_alg(tfm); 574 struct chcr_alg_template *chcr_crypto_alg = 575 container_of(alg, struct chcr_alg_template, alg.skcipher); 576 577 return chcr_crypto_alg->type & CRYPTO_ALG_SUB_TYPE_MASK; 578 } 579 580 static int cxgb4_is_crypto_q_full(struct net_device *dev, unsigned int idx) 581 { 582 struct adapter *adap = netdev2adap(dev); 583 struct sge_uld_txq_info *txq_info = 584 adap->sge.uld_txq_info[CXGB4_TX_CRYPTO]; 585 struct sge_uld_txq *txq; 586 int ret = 0; 587 588 local_bh_disable(); 589 txq = &txq_info->uldtxq[idx]; 590 spin_lock(&txq->sendq.lock); 591 if (txq->full) 592 ret = -1; 593 spin_unlock(&txq->sendq.lock); 594 local_bh_enable(); 595 return ret; 596 } 597 598 static int generate_copy_rrkey(struct ablk_ctx *ablkctx, 599 struct _key_ctx *key_ctx) 600 { 601 if (ablkctx->ciph_mode == CHCR_SCMD_CIPHER_MODE_AES_CBC) { 602 memcpy(key_ctx->key, ablkctx->rrkey, ablkctx->enckey_len); 603 } else { 604 memcpy(key_ctx->key, 605 ablkctx->key + (ablkctx->enckey_len >> 1), 606 ablkctx->enckey_len >> 1); 607 memcpy(key_ctx->key + (ablkctx->enckey_len >> 1), 608 ablkctx->rrkey, ablkctx->enckey_len >> 1); 609 } 610 return 0; 611 } 612 613 static int chcr_hash_ent_in_wr(struct scatterlist *src, 614 unsigned int minsg, 615 unsigned int space, 616 unsigned int srcskip) 617 { 618 int srclen = 0; 619 int srcsg = minsg; 620 int soffset = 0, sless; 621 622 if (sg_dma_len(src) == srcskip) { 623 src = sg_next(src); 624 srcskip = 0; 625 } 626 while (src && space > (sgl_ent_len[srcsg + 1])) { 627 sless = min_t(unsigned int, sg_dma_len(src) - soffset - srcskip, 628 CHCR_SRC_SG_SIZE); 629 srclen += sless; 630 soffset += sless; 631 srcsg++; 632 if (sg_dma_len(src) == (soffset + srcskip)) { 633 src = sg_next(src); 634 soffset = 0; 635 srcskip = 0; 636 } 637 } 638 return srclen; 639 } 640 641 static int chcr_sg_ent_in_wr(struct scatterlist *src, 642 struct scatterlist *dst, 643 unsigned int minsg, 644 unsigned int space, 645 unsigned int srcskip, 646 unsigned int dstskip) 647 { 648 int srclen = 0, dstlen = 0; 649 int srcsg = minsg, dstsg = minsg; 650 int offset = 0, soffset = 0, less, sless = 0; 651 652 if (sg_dma_len(src) == srcskip) { 653 src = sg_next(src); 654 srcskip = 0; 655 } 656 if (sg_dma_len(dst) == dstskip) { 657 dst = sg_next(dst); 658 dstskip = 0; 659 } 660 661 while (src && dst && 662 space > (sgl_ent_len[srcsg + 1] + dsgl_ent_len[dstsg])) { 663 sless = min_t(unsigned int, sg_dma_len(src) - srcskip - soffset, 664 CHCR_SRC_SG_SIZE); 665 srclen += sless; 666 srcsg++; 667 offset = 0; 668 while (dst && ((dstsg + 1) <= MAX_DSGL_ENT) && 669 space > (sgl_ent_len[srcsg] + dsgl_ent_len[dstsg + 1])) { 670 if (srclen <= dstlen) 671 break; 672 less = min_t(unsigned int, sg_dma_len(dst) - offset - 673 dstskip, CHCR_DST_SG_SIZE); 674 dstlen += less; 675 offset += less; 676 if ((offset + dstskip) == sg_dma_len(dst)) { 677 dst = sg_next(dst); 678 offset = 0; 679 } 680 dstsg++; 681 dstskip = 0; 682 } 683 soffset += sless; 684 if ((soffset + srcskip) == sg_dma_len(src)) { 685 src = sg_next(src); 686 srcskip = 0; 687 soffset = 0; 688 } 689 690 } 691 return min(srclen, dstlen); 692 } 693 694 static int chcr_cipher_fallback(struct crypto_sync_skcipher *cipher, 695 u32 flags, 696 struct scatterlist *src, 697 struct scatterlist *dst, 698 unsigned int nbytes, 699 u8 *iv, 700 unsigned short op_type) 701 { 702 int err; 703 704 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, cipher); 705 706 skcipher_request_set_sync_tfm(subreq, cipher); 707 skcipher_request_set_callback(subreq, flags, NULL, NULL); 708 skcipher_request_set_crypt(subreq, src, dst, 709 nbytes, iv); 710 711 err = op_type ? crypto_skcipher_decrypt(subreq) : 712 crypto_skcipher_encrypt(subreq); 713 skcipher_request_zero(subreq); 714 715 return err; 716 717 } 718 static inline void create_wreq(struct chcr_context *ctx, 719 struct chcr_wr *chcr_req, 720 struct crypto_async_request *req, 721 unsigned int imm, 722 int hash_sz, 723 unsigned int len16, 724 unsigned int sc_len, 725 unsigned int lcb) 726 { 727 struct uld_ctx *u_ctx = ULD_CTX(ctx); 728 int qid = u_ctx->lldi.rxq_ids[ctx->rx_qidx]; 729 730 731 chcr_req->wreq.op_to_cctx_size = FILL_WR_OP_CCTX_SIZE; 732 chcr_req->wreq.pld_size_hash_size = 733 htonl(FW_CRYPTO_LOOKASIDE_WR_HASH_SIZE_V(hash_sz)); 734 chcr_req->wreq.len16_pkd = 735 htonl(FW_CRYPTO_LOOKASIDE_WR_LEN16_V(DIV_ROUND_UP(len16, 16))); 736 chcr_req->wreq.cookie = cpu_to_be64((uintptr_t)req); 737 chcr_req->wreq.rx_chid_to_rx_q_id = 738 FILL_WR_RX_Q_ID(ctx->tx_chan_id, qid, 739 !!lcb, ctx->tx_qidx); 740 741 chcr_req->ulptx.cmd_dest = FILL_ULPTX_CMD_DEST(ctx->tx_chan_id, 742 qid); 743 chcr_req->ulptx.len = htonl((DIV_ROUND_UP(len16, 16) - 744 ((sizeof(chcr_req->wreq)) >> 4))); 745 746 chcr_req->sc_imm.cmd_more = FILL_CMD_MORE(!imm); 747 chcr_req->sc_imm.len = cpu_to_be32(sizeof(struct cpl_tx_sec_pdu) + 748 sizeof(chcr_req->key_ctx) + sc_len); 749 } 750 751 /** 752 * create_cipher_wr - form the WR for cipher operations 753 * @req: cipher req. 754 * @ctx: crypto driver context of the request. 755 * @qid: ingress qid where response of this WR should be received. 756 * @op_type: encryption or decryption 757 */ 758 static struct sk_buff *create_cipher_wr(struct cipher_wr_param *wrparam) 759 { 760 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(wrparam->req); 761 struct ablk_ctx *ablkctx = ABLK_CTX(c_ctx(tfm)); 762 struct sk_buff *skb = NULL; 763 struct chcr_wr *chcr_req; 764 struct cpl_rx_phys_dsgl *phys_cpl; 765 struct ulptx_sgl *ulptx; 766 struct chcr_skcipher_req_ctx *reqctx = 767 skcipher_request_ctx(wrparam->req); 768 unsigned int temp = 0, transhdr_len, dst_size; 769 int error; 770 int nents; 771 unsigned int kctx_len; 772 gfp_t flags = wrparam->req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? 773 GFP_KERNEL : GFP_ATOMIC; 774 struct adapter *adap = padap(c_ctx(tfm)->dev); 775 776 nents = sg_nents_xlen(reqctx->dstsg, wrparam->bytes, CHCR_DST_SG_SIZE, 777 reqctx->dst_ofst); 778 dst_size = get_space_for_phys_dsgl(nents); 779 kctx_len = roundup(ablkctx->enckey_len, 16); 780 transhdr_len = CIPHER_TRANSHDR_SIZE(kctx_len, dst_size); 781 nents = sg_nents_xlen(reqctx->srcsg, wrparam->bytes, 782 CHCR_SRC_SG_SIZE, reqctx->src_ofst); 783 temp = reqctx->imm ? roundup(wrparam->bytes, 16) : 784 (sgl_len(nents) * 8); 785 transhdr_len += temp; 786 transhdr_len = roundup(transhdr_len, 16); 787 skb = alloc_skb(SGE_MAX_WR_LEN, flags); 788 if (!skb) { 789 error = -ENOMEM; 790 goto err; 791 } 792 chcr_req = __skb_put_zero(skb, transhdr_len); 793 chcr_req->sec_cpl.op_ivinsrtofst = 794 FILL_SEC_CPL_OP_IVINSR(c_ctx(tfm)->tx_chan_id, 2, 1); 795 796 chcr_req->sec_cpl.pldlen = htonl(IV + wrparam->bytes); 797 chcr_req->sec_cpl.aadstart_cipherstop_hi = 798 FILL_SEC_CPL_CIPHERSTOP_HI(0, 0, IV + 1, 0); 799 800 chcr_req->sec_cpl.cipherstop_lo_authinsert = 801 FILL_SEC_CPL_AUTHINSERT(0, 0, 0, 0); 802 chcr_req->sec_cpl.seqno_numivs = FILL_SEC_CPL_SCMD0_SEQNO(reqctx->op, 0, 803 ablkctx->ciph_mode, 804 0, 0, IV >> 1); 805 chcr_req->sec_cpl.ivgen_hdrlen = FILL_SEC_CPL_IVGEN_HDRLEN(0, 0, 0, 806 0, 1, dst_size); 807 808 chcr_req->key_ctx.ctx_hdr = ablkctx->key_ctx_hdr; 809 if ((reqctx->op == CHCR_DECRYPT_OP) && 810 (!(get_cryptoalg_subtype(tfm) == 811 CRYPTO_ALG_SUB_TYPE_CTR)) && 812 (!(get_cryptoalg_subtype(tfm) == 813 CRYPTO_ALG_SUB_TYPE_CTR_RFC3686))) { 814 generate_copy_rrkey(ablkctx, &chcr_req->key_ctx); 815 } else { 816 if ((ablkctx->ciph_mode == CHCR_SCMD_CIPHER_MODE_AES_CBC) || 817 (ablkctx->ciph_mode == CHCR_SCMD_CIPHER_MODE_AES_CTR)) { 818 memcpy(chcr_req->key_ctx.key, ablkctx->key, 819 ablkctx->enckey_len); 820 } else { 821 memcpy(chcr_req->key_ctx.key, ablkctx->key + 822 (ablkctx->enckey_len >> 1), 823 ablkctx->enckey_len >> 1); 824 memcpy(chcr_req->key_ctx.key + 825 (ablkctx->enckey_len >> 1), 826 ablkctx->key, 827 ablkctx->enckey_len >> 1); 828 } 829 } 830 phys_cpl = (struct cpl_rx_phys_dsgl *)((u8 *)(chcr_req + 1) + kctx_len); 831 ulptx = (struct ulptx_sgl *)((u8 *)(phys_cpl + 1) + dst_size); 832 chcr_add_cipher_src_ent(wrparam->req, ulptx, wrparam); 833 chcr_add_cipher_dst_ent(wrparam->req, phys_cpl, wrparam, wrparam->qid); 834 835 atomic_inc(&adap->chcr_stats.cipher_rqst); 836 temp = sizeof(struct cpl_rx_phys_dsgl) + dst_size + kctx_len + IV 837 + (reqctx->imm ? (wrparam->bytes) : 0); 838 create_wreq(c_ctx(tfm), chcr_req, &(wrparam->req->base), reqctx->imm, 0, 839 transhdr_len, temp, 840 ablkctx->ciph_mode == CHCR_SCMD_CIPHER_MODE_AES_CBC); 841 reqctx->skb = skb; 842 843 if (reqctx->op && (ablkctx->ciph_mode == 844 CHCR_SCMD_CIPHER_MODE_AES_CBC)) 845 sg_pcopy_to_buffer(wrparam->req->src, 846 sg_nents(wrparam->req->src), wrparam->req->iv, 16, 847 reqctx->processed + wrparam->bytes - AES_BLOCK_SIZE); 848 849 return skb; 850 err: 851 return ERR_PTR(error); 852 } 853 854 static inline int chcr_keyctx_ck_size(unsigned int keylen) 855 { 856 int ck_size = 0; 857 858 if (keylen == AES_KEYSIZE_128) 859 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; 860 else if (keylen == AES_KEYSIZE_192) 861 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192; 862 else if (keylen == AES_KEYSIZE_256) 863 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256; 864 else 865 ck_size = 0; 866 867 return ck_size; 868 } 869 static int chcr_cipher_fallback_setkey(struct crypto_skcipher *cipher, 870 const u8 *key, 871 unsigned int keylen) 872 { 873 struct crypto_tfm *tfm = crypto_skcipher_tfm(cipher); 874 struct ablk_ctx *ablkctx = ABLK_CTX(c_ctx(cipher)); 875 int err = 0; 876 877 crypto_sync_skcipher_clear_flags(ablkctx->sw_cipher, 878 CRYPTO_TFM_REQ_MASK); 879 crypto_sync_skcipher_set_flags(ablkctx->sw_cipher, 880 cipher->base.crt_flags & CRYPTO_TFM_REQ_MASK); 881 err = crypto_sync_skcipher_setkey(ablkctx->sw_cipher, key, keylen); 882 tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK; 883 tfm->crt_flags |= 884 crypto_sync_skcipher_get_flags(ablkctx->sw_cipher) & 885 CRYPTO_TFM_RES_MASK; 886 return err; 887 } 888 889 static int chcr_aes_cbc_setkey(struct crypto_skcipher *cipher, 890 const u8 *key, 891 unsigned int keylen) 892 { 893 struct ablk_ctx *ablkctx = ABLK_CTX(c_ctx(cipher)); 894 unsigned int ck_size, context_size; 895 u16 alignment = 0; 896 int err; 897 898 err = chcr_cipher_fallback_setkey(cipher, key, keylen); 899 if (err) 900 goto badkey_err; 901 902 ck_size = chcr_keyctx_ck_size(keylen); 903 alignment = ck_size == CHCR_KEYCTX_CIPHER_KEY_SIZE_192 ? 8 : 0; 904 memcpy(ablkctx->key, key, keylen); 905 ablkctx->enckey_len = keylen; 906 get_aes_decrypt_key(ablkctx->rrkey, ablkctx->key, keylen << 3); 907 context_size = (KEY_CONTEXT_HDR_SALT_AND_PAD + 908 keylen + alignment) >> 4; 909 910 ablkctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, CHCR_KEYCTX_NO_KEY, 911 0, 0, context_size); 912 ablkctx->ciph_mode = CHCR_SCMD_CIPHER_MODE_AES_CBC; 913 return 0; 914 badkey_err: 915 crypto_skcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); 916 ablkctx->enckey_len = 0; 917 918 return err; 919 } 920 921 static int chcr_aes_ctr_setkey(struct crypto_skcipher *cipher, 922 const u8 *key, 923 unsigned int keylen) 924 { 925 struct ablk_ctx *ablkctx = ABLK_CTX(c_ctx(cipher)); 926 unsigned int ck_size, context_size; 927 u16 alignment = 0; 928 int err; 929 930 err = chcr_cipher_fallback_setkey(cipher, key, keylen); 931 if (err) 932 goto badkey_err; 933 ck_size = chcr_keyctx_ck_size(keylen); 934 alignment = (ck_size == CHCR_KEYCTX_CIPHER_KEY_SIZE_192) ? 8 : 0; 935 memcpy(ablkctx->key, key, keylen); 936 ablkctx->enckey_len = keylen; 937 context_size = (KEY_CONTEXT_HDR_SALT_AND_PAD + 938 keylen + alignment) >> 4; 939 940 ablkctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, CHCR_KEYCTX_NO_KEY, 941 0, 0, context_size); 942 ablkctx->ciph_mode = CHCR_SCMD_CIPHER_MODE_AES_CTR; 943 944 return 0; 945 badkey_err: 946 crypto_skcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); 947 ablkctx->enckey_len = 0; 948 949 return err; 950 } 951 952 static int chcr_aes_rfc3686_setkey(struct crypto_skcipher *cipher, 953 const u8 *key, 954 unsigned int keylen) 955 { 956 struct ablk_ctx *ablkctx = ABLK_CTX(c_ctx(cipher)); 957 unsigned int ck_size, context_size; 958 u16 alignment = 0; 959 int err; 960 961 if (keylen < CTR_RFC3686_NONCE_SIZE) 962 return -EINVAL; 963 memcpy(ablkctx->nonce, key + (keylen - CTR_RFC3686_NONCE_SIZE), 964 CTR_RFC3686_NONCE_SIZE); 965 966 keylen -= CTR_RFC3686_NONCE_SIZE; 967 err = chcr_cipher_fallback_setkey(cipher, key, keylen); 968 if (err) 969 goto badkey_err; 970 971 ck_size = chcr_keyctx_ck_size(keylen); 972 alignment = (ck_size == CHCR_KEYCTX_CIPHER_KEY_SIZE_192) ? 8 : 0; 973 memcpy(ablkctx->key, key, keylen); 974 ablkctx->enckey_len = keylen; 975 context_size = (KEY_CONTEXT_HDR_SALT_AND_PAD + 976 keylen + alignment) >> 4; 977 978 ablkctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, CHCR_KEYCTX_NO_KEY, 979 0, 0, context_size); 980 ablkctx->ciph_mode = CHCR_SCMD_CIPHER_MODE_AES_CTR; 981 982 return 0; 983 badkey_err: 984 crypto_skcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); 985 ablkctx->enckey_len = 0; 986 987 return err; 988 } 989 static void ctr_add_iv(u8 *dstiv, u8 *srciv, u32 add) 990 { 991 unsigned int size = AES_BLOCK_SIZE; 992 __be32 *b = (__be32 *)(dstiv + size); 993 u32 c, prev; 994 995 memcpy(dstiv, srciv, AES_BLOCK_SIZE); 996 for (; size >= 4; size -= 4) { 997 prev = be32_to_cpu(*--b); 998 c = prev + add; 999 *b = cpu_to_be32(c); 1000 if (prev < c) 1001 break; 1002 add = 1; 1003 } 1004 1005 } 1006 1007 static unsigned int adjust_ctr_overflow(u8 *iv, u32 bytes) 1008 { 1009 __be32 *b = (__be32 *)(iv + AES_BLOCK_SIZE); 1010 u64 c; 1011 u32 temp = be32_to_cpu(*--b); 1012 1013 temp = ~temp; 1014 c = (u64)temp + 1; // No of block can processed withou overflow 1015 if ((bytes / AES_BLOCK_SIZE) > c) 1016 bytes = c * AES_BLOCK_SIZE; 1017 return bytes; 1018 } 1019 1020 static int chcr_update_tweak(struct skcipher_request *req, u8 *iv, 1021 u32 isfinal) 1022 { 1023 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 1024 struct ablk_ctx *ablkctx = ABLK_CTX(c_ctx(tfm)); 1025 struct chcr_skcipher_req_ctx *reqctx = skcipher_request_ctx(req); 1026 struct crypto_aes_ctx aes; 1027 int ret, i; 1028 u8 *key; 1029 unsigned int keylen; 1030 int round = reqctx->last_req_len / AES_BLOCK_SIZE; 1031 int round8 = round / 8; 1032 1033 memcpy(iv, reqctx->iv, AES_BLOCK_SIZE); 1034 1035 keylen = ablkctx->enckey_len / 2; 1036 key = ablkctx->key + keylen; 1037 ret = aes_expandkey(&aes, key, keylen); 1038 if (ret) 1039 return ret; 1040 aes_encrypt(&aes, iv, iv); 1041 for (i = 0; i < round8; i++) 1042 gf128mul_x8_ble((le128 *)iv, (le128 *)iv); 1043 1044 for (i = 0; i < (round % 8); i++) 1045 gf128mul_x_ble((le128 *)iv, (le128 *)iv); 1046 1047 if (!isfinal) 1048 aes_decrypt(&aes, iv, iv); 1049 1050 memzero_explicit(&aes, sizeof(aes)); 1051 return 0; 1052 } 1053 1054 static int chcr_update_cipher_iv(struct skcipher_request *req, 1055 struct cpl_fw6_pld *fw6_pld, u8 *iv) 1056 { 1057 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 1058 struct chcr_skcipher_req_ctx *reqctx = skcipher_request_ctx(req); 1059 int subtype = get_cryptoalg_subtype(tfm); 1060 int ret = 0; 1061 1062 if (subtype == CRYPTO_ALG_SUB_TYPE_CTR) 1063 ctr_add_iv(iv, req->iv, (reqctx->processed / 1064 AES_BLOCK_SIZE)); 1065 else if (subtype == CRYPTO_ALG_SUB_TYPE_CTR_RFC3686) 1066 *(__be32 *)(reqctx->iv + CTR_RFC3686_NONCE_SIZE + 1067 CTR_RFC3686_IV_SIZE) = cpu_to_be32((reqctx->processed / 1068 AES_BLOCK_SIZE) + 1); 1069 else if (subtype == CRYPTO_ALG_SUB_TYPE_XTS) 1070 ret = chcr_update_tweak(req, iv, 0); 1071 else if (subtype == CRYPTO_ALG_SUB_TYPE_CBC) { 1072 if (reqctx->op) 1073 /*Updated before sending last WR*/ 1074 memcpy(iv, req->iv, AES_BLOCK_SIZE); 1075 else 1076 memcpy(iv, &fw6_pld->data[2], AES_BLOCK_SIZE); 1077 } 1078 1079 return ret; 1080 1081 } 1082 1083 /* We need separate function for final iv because in rfc3686 Initial counter 1084 * starts from 1 and buffer size of iv is 8 byte only which remains constant 1085 * for subsequent update requests 1086 */ 1087 1088 static int chcr_final_cipher_iv(struct skcipher_request *req, 1089 struct cpl_fw6_pld *fw6_pld, u8 *iv) 1090 { 1091 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 1092 struct chcr_skcipher_req_ctx *reqctx = skcipher_request_ctx(req); 1093 int subtype = get_cryptoalg_subtype(tfm); 1094 int ret = 0; 1095 1096 if (subtype == CRYPTO_ALG_SUB_TYPE_CTR) 1097 ctr_add_iv(iv, req->iv, DIV_ROUND_UP(reqctx->processed, 1098 AES_BLOCK_SIZE)); 1099 else if (subtype == CRYPTO_ALG_SUB_TYPE_XTS) 1100 ret = chcr_update_tweak(req, iv, 1); 1101 else if (subtype == CRYPTO_ALG_SUB_TYPE_CBC) { 1102 /*Already updated for Decrypt*/ 1103 if (!reqctx->op) 1104 memcpy(iv, &fw6_pld->data[2], AES_BLOCK_SIZE); 1105 1106 } 1107 return ret; 1108 1109 } 1110 1111 static int chcr_handle_cipher_resp(struct skcipher_request *req, 1112 unsigned char *input, int err) 1113 { 1114 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 1115 struct uld_ctx *u_ctx = ULD_CTX(c_ctx(tfm)); 1116 struct ablk_ctx *ablkctx = ABLK_CTX(c_ctx(tfm)); 1117 struct sk_buff *skb; 1118 struct cpl_fw6_pld *fw6_pld = (struct cpl_fw6_pld *)input; 1119 struct chcr_skcipher_req_ctx *reqctx = skcipher_request_ctx(req); 1120 struct cipher_wr_param wrparam; 1121 struct chcr_dev *dev = c_ctx(tfm)->dev; 1122 int bytes; 1123 1124 if (err) 1125 goto unmap; 1126 if (req->cryptlen == reqctx->processed) { 1127 chcr_cipher_dma_unmap(&ULD_CTX(c_ctx(tfm))->lldi.pdev->dev, 1128 req); 1129 err = chcr_final_cipher_iv(req, fw6_pld, req->iv); 1130 goto complete; 1131 } 1132 1133 if (!reqctx->imm) { 1134 bytes = chcr_sg_ent_in_wr(reqctx->srcsg, reqctx->dstsg, 0, 1135 CIP_SPACE_LEFT(ablkctx->enckey_len), 1136 reqctx->src_ofst, reqctx->dst_ofst); 1137 if ((bytes + reqctx->processed) >= req->cryptlen) 1138 bytes = req->cryptlen - reqctx->processed; 1139 else 1140 bytes = rounddown(bytes, 16); 1141 } else { 1142 /*CTR mode counter overfloa*/ 1143 bytes = req->cryptlen - reqctx->processed; 1144 } 1145 err = chcr_update_cipher_iv(req, fw6_pld, reqctx->iv); 1146 if (err) 1147 goto unmap; 1148 1149 if (unlikely(bytes == 0)) { 1150 chcr_cipher_dma_unmap(&ULD_CTX(c_ctx(tfm))->lldi.pdev->dev, 1151 req); 1152 err = chcr_cipher_fallback(ablkctx->sw_cipher, 1153 req->base.flags, 1154 req->src, 1155 req->dst, 1156 req->cryptlen, 1157 req->iv, 1158 reqctx->op); 1159 goto complete; 1160 } 1161 1162 if (get_cryptoalg_subtype(tfm) == 1163 CRYPTO_ALG_SUB_TYPE_CTR) 1164 bytes = adjust_ctr_overflow(reqctx->iv, bytes); 1165 wrparam.qid = u_ctx->lldi.rxq_ids[c_ctx(tfm)->rx_qidx]; 1166 wrparam.req = req; 1167 wrparam.bytes = bytes; 1168 skb = create_cipher_wr(&wrparam); 1169 if (IS_ERR(skb)) { 1170 pr_err("chcr : %s : Failed to form WR. No memory\n", __func__); 1171 err = PTR_ERR(skb); 1172 goto unmap; 1173 } 1174 skb->dev = u_ctx->lldi.ports[0]; 1175 set_wr_txq(skb, CPL_PRIORITY_DATA, c_ctx(tfm)->tx_qidx); 1176 chcr_send_wr(skb); 1177 reqctx->last_req_len = bytes; 1178 reqctx->processed += bytes; 1179 return 0; 1180 unmap: 1181 chcr_cipher_dma_unmap(&ULD_CTX(c_ctx(tfm))->lldi.pdev->dev, req); 1182 complete: 1183 chcr_dec_wrcount(dev); 1184 req->base.complete(&req->base, err); 1185 return err; 1186 } 1187 1188 static int process_cipher(struct skcipher_request *req, 1189 unsigned short qid, 1190 struct sk_buff **skb, 1191 unsigned short op_type) 1192 { 1193 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 1194 unsigned int ivsize = crypto_skcipher_ivsize(tfm); 1195 struct chcr_skcipher_req_ctx *reqctx = skcipher_request_ctx(req); 1196 struct ablk_ctx *ablkctx = ABLK_CTX(c_ctx(tfm)); 1197 struct cipher_wr_param wrparam; 1198 int bytes, err = -EINVAL; 1199 1200 reqctx->processed = 0; 1201 if (!req->iv) 1202 goto error; 1203 if ((ablkctx->enckey_len == 0) || (ivsize > AES_BLOCK_SIZE) || 1204 (req->cryptlen == 0) || 1205 (req->cryptlen % crypto_skcipher_blocksize(tfm))) { 1206 pr_err("AES: Invalid value of Key Len %d nbytes %d IV Len %d\n", 1207 ablkctx->enckey_len, req->cryptlen, ivsize); 1208 goto error; 1209 } 1210 1211 err = chcr_cipher_dma_map(&ULD_CTX(c_ctx(tfm))->lldi.pdev->dev, req); 1212 if (err) 1213 goto error; 1214 if (req->cryptlen < (SGE_MAX_WR_LEN - (sizeof(struct chcr_wr) + 1215 AES_MIN_KEY_SIZE + 1216 sizeof(struct cpl_rx_phys_dsgl) + 1217 /*Min dsgl size*/ 1218 32))) { 1219 /* Can be sent as Imm*/ 1220 unsigned int dnents = 0, transhdr_len, phys_dsgl, kctx_len; 1221 1222 dnents = sg_nents_xlen(req->dst, req->cryptlen, 1223 CHCR_DST_SG_SIZE, 0); 1224 phys_dsgl = get_space_for_phys_dsgl(dnents); 1225 kctx_len = roundup(ablkctx->enckey_len, 16); 1226 transhdr_len = CIPHER_TRANSHDR_SIZE(kctx_len, phys_dsgl); 1227 reqctx->imm = (transhdr_len + IV + req->cryptlen) <= 1228 SGE_MAX_WR_LEN; 1229 bytes = IV + req->cryptlen; 1230 1231 } else { 1232 reqctx->imm = 0; 1233 } 1234 1235 if (!reqctx->imm) { 1236 bytes = chcr_sg_ent_in_wr(req->src, req->dst, 0, 1237 CIP_SPACE_LEFT(ablkctx->enckey_len), 1238 0, 0); 1239 if ((bytes + reqctx->processed) >= req->cryptlen) 1240 bytes = req->cryptlen - reqctx->processed; 1241 else 1242 bytes = rounddown(bytes, 16); 1243 } else { 1244 bytes = req->cryptlen; 1245 } 1246 if (get_cryptoalg_subtype(tfm) == 1247 CRYPTO_ALG_SUB_TYPE_CTR) { 1248 bytes = adjust_ctr_overflow(req->iv, bytes); 1249 } 1250 if (get_cryptoalg_subtype(tfm) == 1251 CRYPTO_ALG_SUB_TYPE_CTR_RFC3686) { 1252 memcpy(reqctx->iv, ablkctx->nonce, CTR_RFC3686_NONCE_SIZE); 1253 memcpy(reqctx->iv + CTR_RFC3686_NONCE_SIZE, req->iv, 1254 CTR_RFC3686_IV_SIZE); 1255 1256 /* initialize counter portion of counter block */ 1257 *(__be32 *)(reqctx->iv + CTR_RFC3686_NONCE_SIZE + 1258 CTR_RFC3686_IV_SIZE) = cpu_to_be32(1); 1259 1260 } else { 1261 1262 memcpy(reqctx->iv, req->iv, IV); 1263 } 1264 if (unlikely(bytes == 0)) { 1265 chcr_cipher_dma_unmap(&ULD_CTX(c_ctx(tfm))->lldi.pdev->dev, 1266 req); 1267 err = chcr_cipher_fallback(ablkctx->sw_cipher, 1268 req->base.flags, 1269 req->src, 1270 req->dst, 1271 req->cryptlen, 1272 reqctx->iv, 1273 op_type); 1274 goto error; 1275 } 1276 reqctx->op = op_type; 1277 reqctx->srcsg = req->src; 1278 reqctx->dstsg = req->dst; 1279 reqctx->src_ofst = 0; 1280 reqctx->dst_ofst = 0; 1281 wrparam.qid = qid; 1282 wrparam.req = req; 1283 wrparam.bytes = bytes; 1284 *skb = create_cipher_wr(&wrparam); 1285 if (IS_ERR(*skb)) { 1286 err = PTR_ERR(*skb); 1287 goto unmap; 1288 } 1289 reqctx->processed = bytes; 1290 reqctx->last_req_len = bytes; 1291 1292 return 0; 1293 unmap: 1294 chcr_cipher_dma_unmap(&ULD_CTX(c_ctx(tfm))->lldi.pdev->dev, req); 1295 error: 1296 return err; 1297 } 1298 1299 static int chcr_aes_encrypt(struct skcipher_request *req) 1300 { 1301 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 1302 struct chcr_dev *dev = c_ctx(tfm)->dev; 1303 struct sk_buff *skb = NULL; 1304 int err, isfull = 0; 1305 struct uld_ctx *u_ctx = ULD_CTX(c_ctx(tfm)); 1306 1307 err = chcr_inc_wrcount(dev); 1308 if (err) 1309 return -ENXIO; 1310 if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], 1311 c_ctx(tfm)->tx_qidx))) { 1312 isfull = 1; 1313 if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) { 1314 err = -ENOSPC; 1315 goto error; 1316 } 1317 } 1318 1319 err = process_cipher(req, u_ctx->lldi.rxq_ids[c_ctx(tfm)->rx_qidx], 1320 &skb, CHCR_ENCRYPT_OP); 1321 if (err || !skb) 1322 return err; 1323 skb->dev = u_ctx->lldi.ports[0]; 1324 set_wr_txq(skb, CPL_PRIORITY_DATA, c_ctx(tfm)->tx_qidx); 1325 chcr_send_wr(skb); 1326 return isfull ? -EBUSY : -EINPROGRESS; 1327 error: 1328 chcr_dec_wrcount(dev); 1329 return err; 1330 } 1331 1332 static int chcr_aes_decrypt(struct skcipher_request *req) 1333 { 1334 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 1335 struct uld_ctx *u_ctx = ULD_CTX(c_ctx(tfm)); 1336 struct chcr_dev *dev = c_ctx(tfm)->dev; 1337 struct sk_buff *skb = NULL; 1338 int err, isfull = 0; 1339 1340 err = chcr_inc_wrcount(dev); 1341 if (err) 1342 return -ENXIO; 1343 1344 if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], 1345 c_ctx(tfm)->tx_qidx))) { 1346 isfull = 1; 1347 if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) 1348 return -ENOSPC; 1349 } 1350 1351 err = process_cipher(req, u_ctx->lldi.rxq_ids[c_ctx(tfm)->rx_qidx], 1352 &skb, CHCR_DECRYPT_OP); 1353 if (err || !skb) 1354 return err; 1355 skb->dev = u_ctx->lldi.ports[0]; 1356 set_wr_txq(skb, CPL_PRIORITY_DATA, c_ctx(tfm)->tx_qidx); 1357 chcr_send_wr(skb); 1358 return isfull ? -EBUSY : -EINPROGRESS; 1359 } 1360 1361 static int chcr_device_init(struct chcr_context *ctx) 1362 { 1363 struct uld_ctx *u_ctx = NULL; 1364 unsigned int id; 1365 int txq_perchan, txq_idx, ntxq; 1366 int err = 0, rxq_perchan, rxq_idx; 1367 1368 id = smp_processor_id(); 1369 if (!ctx->dev) { 1370 u_ctx = assign_chcr_device(); 1371 if (!u_ctx) { 1372 err = -ENXIO; 1373 pr_err("chcr device assignment fails\n"); 1374 goto out; 1375 } 1376 ctx->dev = &u_ctx->dev; 1377 ntxq = u_ctx->lldi.ntxq; 1378 rxq_perchan = u_ctx->lldi.nrxq / u_ctx->lldi.nchan; 1379 txq_perchan = ntxq / u_ctx->lldi.nchan; 1380 spin_lock(&ctx->dev->lock_chcr_dev); 1381 ctx->tx_chan_id = ctx->dev->tx_channel_id; 1382 ctx->dev->tx_channel_id = !ctx->dev->tx_channel_id; 1383 spin_unlock(&ctx->dev->lock_chcr_dev); 1384 rxq_idx = ctx->tx_chan_id * rxq_perchan; 1385 rxq_idx += id % rxq_perchan; 1386 txq_idx = ctx->tx_chan_id * txq_perchan; 1387 txq_idx += id % txq_perchan; 1388 ctx->rx_qidx = rxq_idx; 1389 ctx->tx_qidx = txq_idx; 1390 /* Channel Id used by SGE to forward packet to Host. 1391 * Same value should be used in cpl_fw6_pld RSS_CH field 1392 * by FW. Driver programs PCI channel ID to be used in fw 1393 * at the time of queue allocation with value "pi->tx_chan" 1394 */ 1395 ctx->pci_chan_id = txq_idx / txq_perchan; 1396 } 1397 out: 1398 return err; 1399 } 1400 1401 static int chcr_init_tfm(struct crypto_skcipher *tfm) 1402 { 1403 struct skcipher_alg *alg = crypto_skcipher_alg(tfm); 1404 struct chcr_context *ctx = crypto_skcipher_ctx(tfm); 1405 struct ablk_ctx *ablkctx = ABLK_CTX(ctx); 1406 1407 ablkctx->sw_cipher = crypto_alloc_sync_skcipher(alg->base.cra_name, 0, 1408 CRYPTO_ALG_NEED_FALLBACK); 1409 if (IS_ERR(ablkctx->sw_cipher)) { 1410 pr_err("failed to allocate fallback for %s\n", alg->base.cra_name); 1411 return PTR_ERR(ablkctx->sw_cipher); 1412 } 1413 1414 crypto_skcipher_set_reqsize(tfm, sizeof(struct chcr_skcipher_req_ctx)); 1415 1416 return chcr_device_init(ctx); 1417 } 1418 1419 static int chcr_rfc3686_init(struct crypto_skcipher *tfm) 1420 { 1421 struct skcipher_alg *alg = crypto_skcipher_alg(tfm); 1422 struct chcr_context *ctx = crypto_skcipher_ctx(tfm); 1423 struct ablk_ctx *ablkctx = ABLK_CTX(ctx); 1424 1425 /*RFC3686 initialises IV counter value to 1, rfc3686(ctr(aes)) 1426 * cannot be used as fallback in chcr_handle_cipher_response 1427 */ 1428 ablkctx->sw_cipher = crypto_alloc_sync_skcipher("ctr(aes)", 0, 1429 CRYPTO_ALG_NEED_FALLBACK); 1430 if (IS_ERR(ablkctx->sw_cipher)) { 1431 pr_err("failed to allocate fallback for %s\n", alg->base.cra_name); 1432 return PTR_ERR(ablkctx->sw_cipher); 1433 } 1434 crypto_skcipher_set_reqsize(tfm, sizeof(struct chcr_skcipher_req_ctx)); 1435 return chcr_device_init(ctx); 1436 } 1437 1438 1439 static void chcr_exit_tfm(struct crypto_skcipher *tfm) 1440 { 1441 struct chcr_context *ctx = crypto_skcipher_ctx(tfm); 1442 struct ablk_ctx *ablkctx = ABLK_CTX(ctx); 1443 1444 crypto_free_sync_skcipher(ablkctx->sw_cipher); 1445 } 1446 1447 static int get_alg_config(struct algo_param *params, 1448 unsigned int auth_size) 1449 { 1450 switch (auth_size) { 1451 case SHA1_DIGEST_SIZE: 1452 params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_160; 1453 params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA1; 1454 params->result_size = SHA1_DIGEST_SIZE; 1455 break; 1456 case SHA224_DIGEST_SIZE: 1457 params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_256; 1458 params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA224; 1459 params->result_size = SHA256_DIGEST_SIZE; 1460 break; 1461 case SHA256_DIGEST_SIZE: 1462 params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_256; 1463 params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA256; 1464 params->result_size = SHA256_DIGEST_SIZE; 1465 break; 1466 case SHA384_DIGEST_SIZE: 1467 params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_512; 1468 params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA512_384; 1469 params->result_size = SHA512_DIGEST_SIZE; 1470 break; 1471 case SHA512_DIGEST_SIZE: 1472 params->mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_512; 1473 params->auth_mode = CHCR_SCMD_AUTH_MODE_SHA512_512; 1474 params->result_size = SHA512_DIGEST_SIZE; 1475 break; 1476 default: 1477 pr_err("chcr : ERROR, unsupported digest size\n"); 1478 return -EINVAL; 1479 } 1480 return 0; 1481 } 1482 1483 static inline void chcr_free_shash(struct crypto_shash *base_hash) 1484 { 1485 crypto_free_shash(base_hash); 1486 } 1487 1488 /** 1489 * create_hash_wr - Create hash work request 1490 * @req - Cipher req base 1491 */ 1492 static struct sk_buff *create_hash_wr(struct ahash_request *req, 1493 struct hash_wr_param *param) 1494 { 1495 struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); 1496 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 1497 struct hmac_ctx *hmacctx = HMAC_CTX(h_ctx(tfm)); 1498 struct sk_buff *skb = NULL; 1499 struct uld_ctx *u_ctx = ULD_CTX(h_ctx(tfm)); 1500 struct chcr_wr *chcr_req; 1501 struct ulptx_sgl *ulptx; 1502 unsigned int nents = 0, transhdr_len; 1503 unsigned int temp = 0; 1504 gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : 1505 GFP_ATOMIC; 1506 struct adapter *adap = padap(h_ctx(tfm)->dev); 1507 int error = 0; 1508 1509 transhdr_len = HASH_TRANSHDR_SIZE(param->kctx_len); 1510 req_ctx->hctx_wr.imm = (transhdr_len + param->bfr_len + 1511 param->sg_len) <= SGE_MAX_WR_LEN; 1512 nents = sg_nents_xlen(req_ctx->hctx_wr.srcsg, param->sg_len, 1513 CHCR_SRC_SG_SIZE, req_ctx->hctx_wr.src_ofst); 1514 nents += param->bfr_len ? 1 : 0; 1515 transhdr_len += req_ctx->hctx_wr.imm ? roundup(param->bfr_len + 1516 param->sg_len, 16) : (sgl_len(nents) * 8); 1517 transhdr_len = roundup(transhdr_len, 16); 1518 1519 skb = alloc_skb(transhdr_len, flags); 1520 if (!skb) 1521 return ERR_PTR(-ENOMEM); 1522 chcr_req = __skb_put_zero(skb, transhdr_len); 1523 1524 chcr_req->sec_cpl.op_ivinsrtofst = 1525 FILL_SEC_CPL_OP_IVINSR(h_ctx(tfm)->tx_chan_id, 2, 0); 1526 chcr_req->sec_cpl.pldlen = htonl(param->bfr_len + param->sg_len); 1527 1528 chcr_req->sec_cpl.aadstart_cipherstop_hi = 1529 FILL_SEC_CPL_CIPHERSTOP_HI(0, 0, 0, 0); 1530 chcr_req->sec_cpl.cipherstop_lo_authinsert = 1531 FILL_SEC_CPL_AUTHINSERT(0, 1, 0, 0); 1532 chcr_req->sec_cpl.seqno_numivs = 1533 FILL_SEC_CPL_SCMD0_SEQNO(0, 0, 0, param->alg_prm.auth_mode, 1534 param->opad_needed, 0); 1535 1536 chcr_req->sec_cpl.ivgen_hdrlen = 1537 FILL_SEC_CPL_IVGEN_HDRLEN(param->last, param->more, 0, 1, 0, 0); 1538 1539 memcpy(chcr_req->key_ctx.key, req_ctx->partial_hash, 1540 param->alg_prm.result_size); 1541 1542 if (param->opad_needed) 1543 memcpy(chcr_req->key_ctx.key + 1544 ((param->alg_prm.result_size <= 32) ? 32 : 1545 CHCR_HASH_MAX_DIGEST_SIZE), 1546 hmacctx->opad, param->alg_prm.result_size); 1547 1548 chcr_req->key_ctx.ctx_hdr = FILL_KEY_CTX_HDR(CHCR_KEYCTX_NO_KEY, 1549 param->alg_prm.mk_size, 0, 1550 param->opad_needed, 1551 ((param->kctx_len + 1552 sizeof(chcr_req->key_ctx)) >> 4)); 1553 chcr_req->sec_cpl.scmd1 = cpu_to_be64((u64)param->scmd1); 1554 ulptx = (struct ulptx_sgl *)((u8 *)(chcr_req + 1) + param->kctx_len + 1555 DUMMY_BYTES); 1556 if (param->bfr_len != 0) { 1557 req_ctx->hctx_wr.dma_addr = 1558 dma_map_single(&u_ctx->lldi.pdev->dev, req_ctx->reqbfr, 1559 param->bfr_len, DMA_TO_DEVICE); 1560 if (dma_mapping_error(&u_ctx->lldi.pdev->dev, 1561 req_ctx->hctx_wr. dma_addr)) { 1562 error = -ENOMEM; 1563 goto err; 1564 } 1565 req_ctx->hctx_wr.dma_len = param->bfr_len; 1566 } else { 1567 req_ctx->hctx_wr.dma_addr = 0; 1568 } 1569 chcr_add_hash_src_ent(req, ulptx, param); 1570 /* Request upto max wr size */ 1571 temp = param->kctx_len + DUMMY_BYTES + (req_ctx->hctx_wr.imm ? 1572 (param->sg_len + param->bfr_len) : 0); 1573 atomic_inc(&adap->chcr_stats.digest_rqst); 1574 create_wreq(h_ctx(tfm), chcr_req, &req->base, req_ctx->hctx_wr.imm, 1575 param->hash_size, transhdr_len, 1576 temp, 0); 1577 req_ctx->hctx_wr.skb = skb; 1578 return skb; 1579 err: 1580 kfree_skb(skb); 1581 return ERR_PTR(error); 1582 } 1583 1584 static int chcr_ahash_update(struct ahash_request *req) 1585 { 1586 struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); 1587 struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); 1588 struct uld_ctx *u_ctx = NULL; 1589 struct chcr_dev *dev = h_ctx(rtfm)->dev; 1590 struct sk_buff *skb; 1591 u8 remainder = 0, bs; 1592 unsigned int nbytes = req->nbytes; 1593 struct hash_wr_param params; 1594 int error, isfull = 0; 1595 1596 bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); 1597 u_ctx = ULD_CTX(h_ctx(rtfm)); 1598 1599 if (nbytes + req_ctx->reqlen >= bs) { 1600 remainder = (nbytes + req_ctx->reqlen) % bs; 1601 nbytes = nbytes + req_ctx->reqlen - remainder; 1602 } else { 1603 sg_pcopy_to_buffer(req->src, sg_nents(req->src), req_ctx->reqbfr 1604 + req_ctx->reqlen, nbytes, 0); 1605 req_ctx->reqlen += nbytes; 1606 return 0; 1607 } 1608 error = chcr_inc_wrcount(dev); 1609 if (error) 1610 return -ENXIO; 1611 /* Detach state for CHCR means lldi or padap is freed. Increasing 1612 * inflight count for dev guarantees that lldi and padap is valid 1613 */ 1614 if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], 1615 h_ctx(rtfm)->tx_qidx))) { 1616 isfull = 1; 1617 if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) { 1618 error = -ENOSPC; 1619 goto err; 1620 } 1621 } 1622 1623 chcr_init_hctx_per_wr(req_ctx); 1624 error = chcr_hash_dma_map(&u_ctx->lldi.pdev->dev, req); 1625 if (error) { 1626 error = -ENOMEM; 1627 goto err; 1628 } 1629 get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); 1630 params.kctx_len = roundup(params.alg_prm.result_size, 16); 1631 params.sg_len = chcr_hash_ent_in_wr(req->src, !!req_ctx->reqlen, 1632 HASH_SPACE_LEFT(params.kctx_len), 0); 1633 if (params.sg_len > req->nbytes) 1634 params.sg_len = req->nbytes; 1635 params.sg_len = rounddown(params.sg_len + req_ctx->reqlen, bs) - 1636 req_ctx->reqlen; 1637 params.opad_needed = 0; 1638 params.more = 1; 1639 params.last = 0; 1640 params.bfr_len = req_ctx->reqlen; 1641 params.scmd1 = 0; 1642 req_ctx->hctx_wr.srcsg = req->src; 1643 1644 params.hash_size = params.alg_prm.result_size; 1645 req_ctx->data_len += params.sg_len + params.bfr_len; 1646 skb = create_hash_wr(req, ¶ms); 1647 if (IS_ERR(skb)) { 1648 error = PTR_ERR(skb); 1649 goto unmap; 1650 } 1651 1652 req_ctx->hctx_wr.processed += params.sg_len; 1653 if (remainder) { 1654 /* Swap buffers */ 1655 swap(req_ctx->reqbfr, req_ctx->skbfr); 1656 sg_pcopy_to_buffer(req->src, sg_nents(req->src), 1657 req_ctx->reqbfr, remainder, req->nbytes - 1658 remainder); 1659 } 1660 req_ctx->reqlen = remainder; 1661 skb->dev = u_ctx->lldi.ports[0]; 1662 set_wr_txq(skb, CPL_PRIORITY_DATA, h_ctx(rtfm)->tx_qidx); 1663 chcr_send_wr(skb); 1664 1665 return isfull ? -EBUSY : -EINPROGRESS; 1666 unmap: 1667 chcr_hash_dma_unmap(&u_ctx->lldi.pdev->dev, req); 1668 err: 1669 chcr_dec_wrcount(dev); 1670 return error; 1671 } 1672 1673 static void create_last_hash_block(char *bfr_ptr, unsigned int bs, u64 scmd1) 1674 { 1675 memset(bfr_ptr, 0, bs); 1676 *bfr_ptr = 0x80; 1677 if (bs == 64) 1678 *(__be64 *)(bfr_ptr + 56) = cpu_to_be64(scmd1 << 3); 1679 else 1680 *(__be64 *)(bfr_ptr + 120) = cpu_to_be64(scmd1 << 3); 1681 } 1682 1683 static int chcr_ahash_final(struct ahash_request *req) 1684 { 1685 struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); 1686 struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); 1687 struct chcr_dev *dev = h_ctx(rtfm)->dev; 1688 struct hash_wr_param params; 1689 struct sk_buff *skb; 1690 struct uld_ctx *u_ctx = NULL; 1691 u8 bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); 1692 int error = -EINVAL; 1693 1694 error = chcr_inc_wrcount(dev); 1695 if (error) 1696 return -ENXIO; 1697 1698 chcr_init_hctx_per_wr(req_ctx); 1699 u_ctx = ULD_CTX(h_ctx(rtfm)); 1700 if (is_hmac(crypto_ahash_tfm(rtfm))) 1701 params.opad_needed = 1; 1702 else 1703 params.opad_needed = 0; 1704 params.sg_len = 0; 1705 req_ctx->hctx_wr.isfinal = 1; 1706 get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); 1707 params.kctx_len = roundup(params.alg_prm.result_size, 16); 1708 if (is_hmac(crypto_ahash_tfm(rtfm))) { 1709 params.opad_needed = 1; 1710 params.kctx_len *= 2; 1711 } else { 1712 params.opad_needed = 0; 1713 } 1714 1715 req_ctx->hctx_wr.result = 1; 1716 params.bfr_len = req_ctx->reqlen; 1717 req_ctx->data_len += params.bfr_len + params.sg_len; 1718 req_ctx->hctx_wr.srcsg = req->src; 1719 if (req_ctx->reqlen == 0) { 1720 create_last_hash_block(req_ctx->reqbfr, bs, req_ctx->data_len); 1721 params.last = 0; 1722 params.more = 1; 1723 params.scmd1 = 0; 1724 params.bfr_len = bs; 1725 1726 } else { 1727 params.scmd1 = req_ctx->data_len; 1728 params.last = 1; 1729 params.more = 0; 1730 } 1731 params.hash_size = crypto_ahash_digestsize(rtfm); 1732 skb = create_hash_wr(req, ¶ms); 1733 if (IS_ERR(skb)) { 1734 error = PTR_ERR(skb); 1735 goto err; 1736 } 1737 req_ctx->reqlen = 0; 1738 skb->dev = u_ctx->lldi.ports[0]; 1739 set_wr_txq(skb, CPL_PRIORITY_DATA, h_ctx(rtfm)->tx_qidx); 1740 chcr_send_wr(skb); 1741 return -EINPROGRESS; 1742 err: 1743 chcr_dec_wrcount(dev); 1744 return error; 1745 } 1746 1747 static int chcr_ahash_finup(struct ahash_request *req) 1748 { 1749 struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); 1750 struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); 1751 struct chcr_dev *dev = h_ctx(rtfm)->dev; 1752 struct uld_ctx *u_ctx = NULL; 1753 struct sk_buff *skb; 1754 struct hash_wr_param params; 1755 u8 bs; 1756 int error, isfull = 0; 1757 1758 bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); 1759 u_ctx = ULD_CTX(h_ctx(rtfm)); 1760 error = chcr_inc_wrcount(dev); 1761 if (error) 1762 return -ENXIO; 1763 1764 if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], 1765 h_ctx(rtfm)->tx_qidx))) { 1766 isfull = 1; 1767 if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) { 1768 error = -ENOSPC; 1769 goto err; 1770 } 1771 } 1772 chcr_init_hctx_per_wr(req_ctx); 1773 error = chcr_hash_dma_map(&u_ctx->lldi.pdev->dev, req); 1774 if (error) { 1775 error = -ENOMEM; 1776 goto err; 1777 } 1778 1779 get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); 1780 params.kctx_len = roundup(params.alg_prm.result_size, 16); 1781 if (is_hmac(crypto_ahash_tfm(rtfm))) { 1782 params.kctx_len *= 2; 1783 params.opad_needed = 1; 1784 } else { 1785 params.opad_needed = 0; 1786 } 1787 1788 params.sg_len = chcr_hash_ent_in_wr(req->src, !!req_ctx->reqlen, 1789 HASH_SPACE_LEFT(params.kctx_len), 0); 1790 if (params.sg_len < req->nbytes) { 1791 if (is_hmac(crypto_ahash_tfm(rtfm))) { 1792 params.kctx_len /= 2; 1793 params.opad_needed = 0; 1794 } 1795 params.last = 0; 1796 params.more = 1; 1797 params.sg_len = rounddown(params.sg_len + req_ctx->reqlen, bs) 1798 - req_ctx->reqlen; 1799 params.hash_size = params.alg_prm.result_size; 1800 params.scmd1 = 0; 1801 } else { 1802 params.last = 1; 1803 params.more = 0; 1804 params.sg_len = req->nbytes; 1805 params.hash_size = crypto_ahash_digestsize(rtfm); 1806 params.scmd1 = req_ctx->data_len + req_ctx->reqlen + 1807 params.sg_len; 1808 } 1809 params.bfr_len = req_ctx->reqlen; 1810 req_ctx->data_len += params.bfr_len + params.sg_len; 1811 req_ctx->hctx_wr.result = 1; 1812 req_ctx->hctx_wr.srcsg = req->src; 1813 if ((req_ctx->reqlen + req->nbytes) == 0) { 1814 create_last_hash_block(req_ctx->reqbfr, bs, req_ctx->data_len); 1815 params.last = 0; 1816 params.more = 1; 1817 params.scmd1 = 0; 1818 params.bfr_len = bs; 1819 } 1820 skb = create_hash_wr(req, ¶ms); 1821 if (IS_ERR(skb)) { 1822 error = PTR_ERR(skb); 1823 goto unmap; 1824 } 1825 req_ctx->reqlen = 0; 1826 req_ctx->hctx_wr.processed += params.sg_len; 1827 skb->dev = u_ctx->lldi.ports[0]; 1828 set_wr_txq(skb, CPL_PRIORITY_DATA, h_ctx(rtfm)->tx_qidx); 1829 chcr_send_wr(skb); 1830 1831 return isfull ? -EBUSY : -EINPROGRESS; 1832 unmap: 1833 chcr_hash_dma_unmap(&u_ctx->lldi.pdev->dev, req); 1834 err: 1835 chcr_dec_wrcount(dev); 1836 return error; 1837 } 1838 1839 static int chcr_ahash_digest(struct ahash_request *req) 1840 { 1841 struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); 1842 struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); 1843 struct chcr_dev *dev = h_ctx(rtfm)->dev; 1844 struct uld_ctx *u_ctx = NULL; 1845 struct sk_buff *skb; 1846 struct hash_wr_param params; 1847 u8 bs; 1848 int error, isfull = 0; 1849 1850 rtfm->init(req); 1851 bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); 1852 error = chcr_inc_wrcount(dev); 1853 if (error) 1854 return -ENXIO; 1855 1856 u_ctx = ULD_CTX(h_ctx(rtfm)); 1857 if (unlikely(cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], 1858 h_ctx(rtfm)->tx_qidx))) { 1859 isfull = 1; 1860 if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) { 1861 error = -ENOSPC; 1862 goto err; 1863 } 1864 } 1865 1866 chcr_init_hctx_per_wr(req_ctx); 1867 error = chcr_hash_dma_map(&u_ctx->lldi.pdev->dev, req); 1868 if (error) { 1869 error = -ENOMEM; 1870 goto err; 1871 } 1872 1873 get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); 1874 params.kctx_len = roundup(params.alg_prm.result_size, 16); 1875 if (is_hmac(crypto_ahash_tfm(rtfm))) { 1876 params.kctx_len *= 2; 1877 params.opad_needed = 1; 1878 } else { 1879 params.opad_needed = 0; 1880 } 1881 params.sg_len = chcr_hash_ent_in_wr(req->src, !!req_ctx->reqlen, 1882 HASH_SPACE_LEFT(params.kctx_len), 0); 1883 if (params.sg_len < req->nbytes) { 1884 if (is_hmac(crypto_ahash_tfm(rtfm))) { 1885 params.kctx_len /= 2; 1886 params.opad_needed = 0; 1887 } 1888 params.last = 0; 1889 params.more = 1; 1890 params.scmd1 = 0; 1891 params.sg_len = rounddown(params.sg_len, bs); 1892 params.hash_size = params.alg_prm.result_size; 1893 } else { 1894 params.sg_len = req->nbytes; 1895 params.hash_size = crypto_ahash_digestsize(rtfm); 1896 params.last = 1; 1897 params.more = 0; 1898 params.scmd1 = req->nbytes + req_ctx->data_len; 1899 1900 } 1901 params.bfr_len = 0; 1902 req_ctx->hctx_wr.result = 1; 1903 req_ctx->hctx_wr.srcsg = req->src; 1904 req_ctx->data_len += params.bfr_len + params.sg_len; 1905 1906 if (req->nbytes == 0) { 1907 create_last_hash_block(req_ctx->reqbfr, bs, 0); 1908 params.more = 1; 1909 params.bfr_len = bs; 1910 } 1911 1912 skb = create_hash_wr(req, ¶ms); 1913 if (IS_ERR(skb)) { 1914 error = PTR_ERR(skb); 1915 goto unmap; 1916 } 1917 req_ctx->hctx_wr.processed += params.sg_len; 1918 skb->dev = u_ctx->lldi.ports[0]; 1919 set_wr_txq(skb, CPL_PRIORITY_DATA, h_ctx(rtfm)->tx_qidx); 1920 chcr_send_wr(skb); 1921 return isfull ? -EBUSY : -EINPROGRESS; 1922 unmap: 1923 chcr_hash_dma_unmap(&u_ctx->lldi.pdev->dev, req); 1924 err: 1925 chcr_dec_wrcount(dev); 1926 return error; 1927 } 1928 1929 static int chcr_ahash_continue(struct ahash_request *req) 1930 { 1931 struct chcr_ahash_req_ctx *reqctx = ahash_request_ctx(req); 1932 struct chcr_hctx_per_wr *hctx_wr = &reqctx->hctx_wr; 1933 struct crypto_ahash *rtfm = crypto_ahash_reqtfm(req); 1934 struct uld_ctx *u_ctx = NULL; 1935 struct sk_buff *skb; 1936 struct hash_wr_param params; 1937 u8 bs; 1938 int error; 1939 1940 bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); 1941 u_ctx = ULD_CTX(h_ctx(rtfm)); 1942 get_alg_config(¶ms.alg_prm, crypto_ahash_digestsize(rtfm)); 1943 params.kctx_len = roundup(params.alg_prm.result_size, 16); 1944 if (is_hmac(crypto_ahash_tfm(rtfm))) { 1945 params.kctx_len *= 2; 1946 params.opad_needed = 1; 1947 } else { 1948 params.opad_needed = 0; 1949 } 1950 params.sg_len = chcr_hash_ent_in_wr(hctx_wr->srcsg, 0, 1951 HASH_SPACE_LEFT(params.kctx_len), 1952 hctx_wr->src_ofst); 1953 if ((params.sg_len + hctx_wr->processed) > req->nbytes) 1954 params.sg_len = req->nbytes - hctx_wr->processed; 1955 if (!hctx_wr->result || 1956 ((params.sg_len + hctx_wr->processed) < req->nbytes)) { 1957 if (is_hmac(crypto_ahash_tfm(rtfm))) { 1958 params.kctx_len /= 2; 1959 params.opad_needed = 0; 1960 } 1961 params.last = 0; 1962 params.more = 1; 1963 params.sg_len = rounddown(params.sg_len, bs); 1964 params.hash_size = params.alg_prm.result_size; 1965 params.scmd1 = 0; 1966 } else { 1967 params.last = 1; 1968 params.more = 0; 1969 params.hash_size = crypto_ahash_digestsize(rtfm); 1970 params.scmd1 = reqctx->data_len + params.sg_len; 1971 } 1972 params.bfr_len = 0; 1973 reqctx->data_len += params.sg_len; 1974 skb = create_hash_wr(req, ¶ms); 1975 if (IS_ERR(skb)) { 1976 error = PTR_ERR(skb); 1977 goto err; 1978 } 1979 hctx_wr->processed += params.sg_len; 1980 skb->dev = u_ctx->lldi.ports[0]; 1981 set_wr_txq(skb, CPL_PRIORITY_DATA, h_ctx(rtfm)->tx_qidx); 1982 chcr_send_wr(skb); 1983 return 0; 1984 err: 1985 return error; 1986 } 1987 1988 static inline void chcr_handle_ahash_resp(struct ahash_request *req, 1989 unsigned char *input, 1990 int err) 1991 { 1992 struct chcr_ahash_req_ctx *reqctx = ahash_request_ctx(req); 1993 struct chcr_hctx_per_wr *hctx_wr = &reqctx->hctx_wr; 1994 int digestsize, updated_digestsize; 1995 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 1996 struct uld_ctx *u_ctx = ULD_CTX(h_ctx(tfm)); 1997 struct chcr_dev *dev = h_ctx(tfm)->dev; 1998 1999 if (input == NULL) 2000 goto out; 2001 digestsize = crypto_ahash_digestsize(crypto_ahash_reqtfm(req)); 2002 updated_digestsize = digestsize; 2003 if (digestsize == SHA224_DIGEST_SIZE) 2004 updated_digestsize = SHA256_DIGEST_SIZE; 2005 else if (digestsize == SHA384_DIGEST_SIZE) 2006 updated_digestsize = SHA512_DIGEST_SIZE; 2007 2008 if (hctx_wr->dma_addr) { 2009 dma_unmap_single(&u_ctx->lldi.pdev->dev, hctx_wr->dma_addr, 2010 hctx_wr->dma_len, DMA_TO_DEVICE); 2011 hctx_wr->dma_addr = 0; 2012 } 2013 if (hctx_wr->isfinal || ((hctx_wr->processed + reqctx->reqlen) == 2014 req->nbytes)) { 2015 if (hctx_wr->result == 1) { 2016 hctx_wr->result = 0; 2017 memcpy(req->result, input + sizeof(struct cpl_fw6_pld), 2018 digestsize); 2019 } else { 2020 memcpy(reqctx->partial_hash, 2021 input + sizeof(struct cpl_fw6_pld), 2022 updated_digestsize); 2023 2024 } 2025 goto unmap; 2026 } 2027 memcpy(reqctx->partial_hash, input + sizeof(struct cpl_fw6_pld), 2028 updated_digestsize); 2029 2030 err = chcr_ahash_continue(req); 2031 if (err) 2032 goto unmap; 2033 return; 2034 unmap: 2035 if (hctx_wr->is_sg_map) 2036 chcr_hash_dma_unmap(&u_ctx->lldi.pdev->dev, req); 2037 2038 2039 out: 2040 chcr_dec_wrcount(dev); 2041 req->base.complete(&req->base, err); 2042 } 2043 2044 /* 2045 * chcr_handle_resp - Unmap the DMA buffers associated with the request 2046 * @req: crypto request 2047 */ 2048 int chcr_handle_resp(struct crypto_async_request *req, unsigned char *input, 2049 int err) 2050 { 2051 struct crypto_tfm *tfm = req->tfm; 2052 struct chcr_context *ctx = crypto_tfm_ctx(tfm); 2053 struct adapter *adap = padap(ctx->dev); 2054 2055 switch (tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK) { 2056 case CRYPTO_ALG_TYPE_AEAD: 2057 err = chcr_handle_aead_resp(aead_request_cast(req), input, err); 2058 break; 2059 2060 case CRYPTO_ALG_TYPE_SKCIPHER: 2061 chcr_handle_cipher_resp(skcipher_request_cast(req), 2062 input, err); 2063 break; 2064 case CRYPTO_ALG_TYPE_AHASH: 2065 chcr_handle_ahash_resp(ahash_request_cast(req), input, err); 2066 } 2067 atomic_inc(&adap->chcr_stats.complete); 2068 return err; 2069 } 2070 static int chcr_ahash_export(struct ahash_request *areq, void *out) 2071 { 2072 struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 2073 struct chcr_ahash_req_ctx *state = out; 2074 2075 state->reqlen = req_ctx->reqlen; 2076 state->data_len = req_ctx->data_len; 2077 memcpy(state->bfr1, req_ctx->reqbfr, req_ctx->reqlen); 2078 memcpy(state->partial_hash, req_ctx->partial_hash, 2079 CHCR_HASH_MAX_DIGEST_SIZE); 2080 chcr_init_hctx_per_wr(state); 2081 return 0; 2082 } 2083 2084 static int chcr_ahash_import(struct ahash_request *areq, const void *in) 2085 { 2086 struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 2087 struct chcr_ahash_req_ctx *state = (struct chcr_ahash_req_ctx *)in; 2088 2089 req_ctx->reqlen = state->reqlen; 2090 req_ctx->data_len = state->data_len; 2091 req_ctx->reqbfr = req_ctx->bfr1; 2092 req_ctx->skbfr = req_ctx->bfr2; 2093 memcpy(req_ctx->bfr1, state->bfr1, CHCR_HASH_MAX_BLOCK_SIZE_128); 2094 memcpy(req_ctx->partial_hash, state->partial_hash, 2095 CHCR_HASH_MAX_DIGEST_SIZE); 2096 chcr_init_hctx_per_wr(req_ctx); 2097 return 0; 2098 } 2099 2100 static int chcr_ahash_setkey(struct crypto_ahash *tfm, const u8 *key, 2101 unsigned int keylen) 2102 { 2103 struct hmac_ctx *hmacctx = HMAC_CTX(h_ctx(tfm)); 2104 unsigned int digestsize = crypto_ahash_digestsize(tfm); 2105 unsigned int bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm)); 2106 unsigned int i, err = 0, updated_digestsize; 2107 2108 SHASH_DESC_ON_STACK(shash, hmacctx->base_hash); 2109 2110 /* use the key to calculate the ipad and opad. ipad will sent with the 2111 * first request's data. opad will be sent with the final hash result 2112 * ipad in hmacctx->ipad and opad in hmacctx->opad location 2113 */ 2114 shash->tfm = hmacctx->base_hash; 2115 if (keylen > bs) { 2116 err = crypto_shash_digest(shash, key, keylen, 2117 hmacctx->ipad); 2118 if (err) 2119 goto out; 2120 keylen = digestsize; 2121 } else { 2122 memcpy(hmacctx->ipad, key, keylen); 2123 } 2124 memset(hmacctx->ipad + keylen, 0, bs - keylen); 2125 memcpy(hmacctx->opad, hmacctx->ipad, bs); 2126 2127 for (i = 0; i < bs / sizeof(int); i++) { 2128 *((unsigned int *)(&hmacctx->ipad) + i) ^= IPAD_DATA; 2129 *((unsigned int *)(&hmacctx->opad) + i) ^= OPAD_DATA; 2130 } 2131 2132 updated_digestsize = digestsize; 2133 if (digestsize == SHA224_DIGEST_SIZE) 2134 updated_digestsize = SHA256_DIGEST_SIZE; 2135 else if (digestsize == SHA384_DIGEST_SIZE) 2136 updated_digestsize = SHA512_DIGEST_SIZE; 2137 err = chcr_compute_partial_hash(shash, hmacctx->ipad, 2138 hmacctx->ipad, digestsize); 2139 if (err) 2140 goto out; 2141 chcr_change_order(hmacctx->ipad, updated_digestsize); 2142 2143 err = chcr_compute_partial_hash(shash, hmacctx->opad, 2144 hmacctx->opad, digestsize); 2145 if (err) 2146 goto out; 2147 chcr_change_order(hmacctx->opad, updated_digestsize); 2148 out: 2149 return err; 2150 } 2151 2152 static int chcr_aes_xts_setkey(struct crypto_skcipher *cipher, const u8 *key, 2153 unsigned int key_len) 2154 { 2155 struct ablk_ctx *ablkctx = ABLK_CTX(c_ctx(cipher)); 2156 unsigned short context_size = 0; 2157 int err; 2158 2159 err = chcr_cipher_fallback_setkey(cipher, key, key_len); 2160 if (err) 2161 goto badkey_err; 2162 2163 memcpy(ablkctx->key, key, key_len); 2164 ablkctx->enckey_len = key_len; 2165 get_aes_decrypt_key(ablkctx->rrkey, ablkctx->key, key_len << 2); 2166 context_size = (KEY_CONTEXT_HDR_SALT_AND_PAD + key_len) >> 4; 2167 ablkctx->key_ctx_hdr = 2168 FILL_KEY_CTX_HDR((key_len == AES_KEYSIZE_256) ? 2169 CHCR_KEYCTX_CIPHER_KEY_SIZE_128 : 2170 CHCR_KEYCTX_CIPHER_KEY_SIZE_256, 2171 CHCR_KEYCTX_NO_KEY, 1, 2172 0, context_size); 2173 ablkctx->ciph_mode = CHCR_SCMD_CIPHER_MODE_AES_XTS; 2174 return 0; 2175 badkey_err: 2176 crypto_skcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); 2177 ablkctx->enckey_len = 0; 2178 2179 return err; 2180 } 2181 2182 static int chcr_sha_init(struct ahash_request *areq) 2183 { 2184 struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 2185 struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq); 2186 int digestsize = crypto_ahash_digestsize(tfm); 2187 2188 req_ctx->data_len = 0; 2189 req_ctx->reqlen = 0; 2190 req_ctx->reqbfr = req_ctx->bfr1; 2191 req_ctx->skbfr = req_ctx->bfr2; 2192 copy_hash_init_values(req_ctx->partial_hash, digestsize); 2193 2194 return 0; 2195 } 2196 2197 static int chcr_sha_cra_init(struct crypto_tfm *tfm) 2198 { 2199 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), 2200 sizeof(struct chcr_ahash_req_ctx)); 2201 return chcr_device_init(crypto_tfm_ctx(tfm)); 2202 } 2203 2204 static int chcr_hmac_init(struct ahash_request *areq) 2205 { 2206 struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(areq); 2207 struct crypto_ahash *rtfm = crypto_ahash_reqtfm(areq); 2208 struct hmac_ctx *hmacctx = HMAC_CTX(h_ctx(rtfm)); 2209 unsigned int digestsize = crypto_ahash_digestsize(rtfm); 2210 unsigned int bs = crypto_tfm_alg_blocksize(crypto_ahash_tfm(rtfm)); 2211 2212 chcr_sha_init(areq); 2213 req_ctx->data_len = bs; 2214 if (is_hmac(crypto_ahash_tfm(rtfm))) { 2215 if (digestsize == SHA224_DIGEST_SIZE) 2216 memcpy(req_ctx->partial_hash, hmacctx->ipad, 2217 SHA256_DIGEST_SIZE); 2218 else if (digestsize == SHA384_DIGEST_SIZE) 2219 memcpy(req_ctx->partial_hash, hmacctx->ipad, 2220 SHA512_DIGEST_SIZE); 2221 else 2222 memcpy(req_ctx->partial_hash, hmacctx->ipad, 2223 digestsize); 2224 } 2225 return 0; 2226 } 2227 2228 static int chcr_hmac_cra_init(struct crypto_tfm *tfm) 2229 { 2230 struct chcr_context *ctx = crypto_tfm_ctx(tfm); 2231 struct hmac_ctx *hmacctx = HMAC_CTX(ctx); 2232 unsigned int digestsize = 2233 crypto_ahash_digestsize(__crypto_ahash_cast(tfm)); 2234 2235 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), 2236 sizeof(struct chcr_ahash_req_ctx)); 2237 hmacctx->base_hash = chcr_alloc_shash(digestsize); 2238 if (IS_ERR(hmacctx->base_hash)) 2239 return PTR_ERR(hmacctx->base_hash); 2240 return chcr_device_init(crypto_tfm_ctx(tfm)); 2241 } 2242 2243 static void chcr_hmac_cra_exit(struct crypto_tfm *tfm) 2244 { 2245 struct chcr_context *ctx = crypto_tfm_ctx(tfm); 2246 struct hmac_ctx *hmacctx = HMAC_CTX(ctx); 2247 2248 if (hmacctx->base_hash) { 2249 chcr_free_shash(hmacctx->base_hash); 2250 hmacctx->base_hash = NULL; 2251 } 2252 } 2253 2254 inline void chcr_aead_common_exit(struct aead_request *req) 2255 { 2256 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 2257 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 2258 struct uld_ctx *u_ctx = ULD_CTX(a_ctx(tfm)); 2259 2260 chcr_aead_dma_unmap(&u_ctx->lldi.pdev->dev, req, reqctx->op); 2261 } 2262 2263 static int chcr_aead_common_init(struct aead_request *req) 2264 { 2265 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 2266 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 2267 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 2268 unsigned int authsize = crypto_aead_authsize(tfm); 2269 int error = -EINVAL; 2270 2271 /* validate key size */ 2272 if (aeadctx->enckey_len == 0) 2273 goto err; 2274 if (reqctx->op && req->cryptlen < authsize) 2275 goto err; 2276 if (reqctx->b0_len) 2277 reqctx->scratch_pad = reqctx->iv + IV; 2278 else 2279 reqctx->scratch_pad = NULL; 2280 2281 error = chcr_aead_dma_map(&ULD_CTX(a_ctx(tfm))->lldi.pdev->dev, req, 2282 reqctx->op); 2283 if (error) { 2284 error = -ENOMEM; 2285 goto err; 2286 } 2287 2288 return 0; 2289 err: 2290 return error; 2291 } 2292 2293 static int chcr_aead_need_fallback(struct aead_request *req, int dst_nents, 2294 int aadmax, int wrlen, 2295 unsigned short op_type) 2296 { 2297 unsigned int authsize = crypto_aead_authsize(crypto_aead_reqtfm(req)); 2298 2299 if (((req->cryptlen - (op_type ? authsize : 0)) == 0) || 2300 dst_nents > MAX_DSGL_ENT || 2301 (req->assoclen > aadmax) || 2302 (wrlen > SGE_MAX_WR_LEN)) 2303 return 1; 2304 return 0; 2305 } 2306 2307 static int chcr_aead_fallback(struct aead_request *req, unsigned short op_type) 2308 { 2309 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 2310 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 2311 struct aead_request *subreq = aead_request_ctx(req); 2312 2313 aead_request_set_tfm(subreq, aeadctx->sw_cipher); 2314 aead_request_set_callback(subreq, req->base.flags, 2315 req->base.complete, req->base.data); 2316 aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, 2317 req->iv); 2318 aead_request_set_ad(subreq, req->assoclen); 2319 return op_type ? crypto_aead_decrypt(subreq) : 2320 crypto_aead_encrypt(subreq); 2321 } 2322 2323 static struct sk_buff *create_authenc_wr(struct aead_request *req, 2324 unsigned short qid, 2325 int size) 2326 { 2327 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 2328 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 2329 struct chcr_authenc_ctx *actx = AUTHENC_CTX(aeadctx); 2330 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 2331 struct sk_buff *skb = NULL; 2332 struct chcr_wr *chcr_req; 2333 struct cpl_rx_phys_dsgl *phys_cpl; 2334 struct ulptx_sgl *ulptx; 2335 unsigned int transhdr_len; 2336 unsigned int dst_size = 0, temp, subtype = get_aead_subtype(tfm); 2337 unsigned int kctx_len = 0, dnents, snents; 2338 unsigned int authsize = crypto_aead_authsize(tfm); 2339 int error = -EINVAL; 2340 u8 *ivptr; 2341 int null = 0; 2342 gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : 2343 GFP_ATOMIC; 2344 struct adapter *adap = padap(a_ctx(tfm)->dev); 2345 2346 if (req->cryptlen == 0) 2347 return NULL; 2348 2349 reqctx->b0_len = 0; 2350 error = chcr_aead_common_init(req); 2351 if (error) 2352 return ERR_PTR(error); 2353 2354 if (subtype == CRYPTO_ALG_SUB_TYPE_CBC_NULL || 2355 subtype == CRYPTO_ALG_SUB_TYPE_CTR_NULL) { 2356 null = 1; 2357 } 2358 dnents = sg_nents_xlen(req->dst, req->assoclen + req->cryptlen + 2359 (reqctx->op ? -authsize : authsize), CHCR_DST_SG_SIZE, 0); 2360 dnents += MIN_AUTH_SG; // For IV 2361 snents = sg_nents_xlen(req->src, req->assoclen + req->cryptlen, 2362 CHCR_SRC_SG_SIZE, 0); 2363 dst_size = get_space_for_phys_dsgl(dnents); 2364 kctx_len = (ntohl(KEY_CONTEXT_CTX_LEN_V(aeadctx->key_ctx_hdr)) << 4) 2365 - sizeof(chcr_req->key_ctx); 2366 transhdr_len = CIPHER_TRANSHDR_SIZE(kctx_len, dst_size); 2367 reqctx->imm = (transhdr_len + req->assoclen + req->cryptlen) < 2368 SGE_MAX_WR_LEN; 2369 temp = reqctx->imm ? roundup(req->assoclen + req->cryptlen, 16) 2370 : (sgl_len(snents) * 8); 2371 transhdr_len += temp; 2372 transhdr_len = roundup(transhdr_len, 16); 2373 2374 if (chcr_aead_need_fallback(req, dnents, T6_MAX_AAD_SIZE, 2375 transhdr_len, reqctx->op)) { 2376 atomic_inc(&adap->chcr_stats.fallback); 2377 chcr_aead_common_exit(req); 2378 return ERR_PTR(chcr_aead_fallback(req, reqctx->op)); 2379 } 2380 skb = alloc_skb(transhdr_len, flags); 2381 if (!skb) { 2382 error = -ENOMEM; 2383 goto err; 2384 } 2385 2386 chcr_req = __skb_put_zero(skb, transhdr_len); 2387 2388 temp = (reqctx->op == CHCR_ENCRYPT_OP) ? 0 : authsize; 2389 2390 /* 2391 * Input order is AAD,IV and Payload. where IV should be included as 2392 * the part of authdata. All other fields should be filled according 2393 * to the hardware spec 2394 */ 2395 chcr_req->sec_cpl.op_ivinsrtofst = 2396 FILL_SEC_CPL_OP_IVINSR(a_ctx(tfm)->tx_chan_id, 2, 1); 2397 chcr_req->sec_cpl.pldlen = htonl(req->assoclen + IV + req->cryptlen); 2398 chcr_req->sec_cpl.aadstart_cipherstop_hi = FILL_SEC_CPL_CIPHERSTOP_HI( 2399 null ? 0 : 1 + IV, 2400 null ? 0 : IV + req->assoclen, 2401 req->assoclen + IV + 1, 2402 (temp & 0x1F0) >> 4); 2403 chcr_req->sec_cpl.cipherstop_lo_authinsert = FILL_SEC_CPL_AUTHINSERT( 2404 temp & 0xF, 2405 null ? 0 : req->assoclen + IV + 1, 2406 temp, temp); 2407 if (subtype == CRYPTO_ALG_SUB_TYPE_CTR_NULL || 2408 subtype == CRYPTO_ALG_SUB_TYPE_CTR_SHA) 2409 temp = CHCR_SCMD_CIPHER_MODE_AES_CTR; 2410 else 2411 temp = CHCR_SCMD_CIPHER_MODE_AES_CBC; 2412 chcr_req->sec_cpl.seqno_numivs = FILL_SEC_CPL_SCMD0_SEQNO(reqctx->op, 2413 (reqctx->op == CHCR_ENCRYPT_OP) ? 1 : 0, 2414 temp, 2415 actx->auth_mode, aeadctx->hmac_ctrl, 2416 IV >> 1); 2417 chcr_req->sec_cpl.ivgen_hdrlen = FILL_SEC_CPL_IVGEN_HDRLEN(0, 0, 1, 2418 0, 0, dst_size); 2419 2420 chcr_req->key_ctx.ctx_hdr = aeadctx->key_ctx_hdr; 2421 if (reqctx->op == CHCR_ENCRYPT_OP || 2422 subtype == CRYPTO_ALG_SUB_TYPE_CTR_SHA || 2423 subtype == CRYPTO_ALG_SUB_TYPE_CTR_NULL) 2424 memcpy(chcr_req->key_ctx.key, aeadctx->key, 2425 aeadctx->enckey_len); 2426 else 2427 memcpy(chcr_req->key_ctx.key, actx->dec_rrkey, 2428 aeadctx->enckey_len); 2429 2430 memcpy(chcr_req->key_ctx.key + roundup(aeadctx->enckey_len, 16), 2431 actx->h_iopad, kctx_len - roundup(aeadctx->enckey_len, 16)); 2432 phys_cpl = (struct cpl_rx_phys_dsgl *)((u8 *)(chcr_req + 1) + kctx_len); 2433 ivptr = (u8 *)(phys_cpl + 1) + dst_size; 2434 ulptx = (struct ulptx_sgl *)(ivptr + IV); 2435 if (subtype == CRYPTO_ALG_SUB_TYPE_CTR_SHA || 2436 subtype == CRYPTO_ALG_SUB_TYPE_CTR_NULL) { 2437 memcpy(ivptr, aeadctx->nonce, CTR_RFC3686_NONCE_SIZE); 2438 memcpy(ivptr + CTR_RFC3686_NONCE_SIZE, req->iv, 2439 CTR_RFC3686_IV_SIZE); 2440 *(__be32 *)(ivptr + CTR_RFC3686_NONCE_SIZE + 2441 CTR_RFC3686_IV_SIZE) = cpu_to_be32(1); 2442 } else { 2443 memcpy(ivptr, req->iv, IV); 2444 } 2445 chcr_add_aead_dst_ent(req, phys_cpl, qid); 2446 chcr_add_aead_src_ent(req, ulptx); 2447 atomic_inc(&adap->chcr_stats.cipher_rqst); 2448 temp = sizeof(struct cpl_rx_phys_dsgl) + dst_size + IV + 2449 kctx_len + (reqctx->imm ? (req->assoclen + req->cryptlen) : 0); 2450 create_wreq(a_ctx(tfm), chcr_req, &req->base, reqctx->imm, size, 2451 transhdr_len, temp, 0); 2452 reqctx->skb = skb; 2453 2454 return skb; 2455 err: 2456 chcr_aead_common_exit(req); 2457 2458 return ERR_PTR(error); 2459 } 2460 2461 int chcr_aead_dma_map(struct device *dev, 2462 struct aead_request *req, 2463 unsigned short op_type) 2464 { 2465 int error; 2466 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 2467 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 2468 unsigned int authsize = crypto_aead_authsize(tfm); 2469 int dst_size; 2470 2471 dst_size = req->assoclen + req->cryptlen + (op_type ? 2472 -authsize : authsize); 2473 if (!req->cryptlen || !dst_size) 2474 return 0; 2475 reqctx->iv_dma = dma_map_single(dev, reqctx->iv, (IV + reqctx->b0_len), 2476 DMA_BIDIRECTIONAL); 2477 if (dma_mapping_error(dev, reqctx->iv_dma)) 2478 return -ENOMEM; 2479 if (reqctx->b0_len) 2480 reqctx->b0_dma = reqctx->iv_dma + IV; 2481 else 2482 reqctx->b0_dma = 0; 2483 if (req->src == req->dst) { 2484 error = dma_map_sg(dev, req->src, sg_nents(req->src), 2485 DMA_BIDIRECTIONAL); 2486 if (!error) 2487 goto err; 2488 } else { 2489 error = dma_map_sg(dev, req->src, sg_nents(req->src), 2490 DMA_TO_DEVICE); 2491 if (!error) 2492 goto err; 2493 error = dma_map_sg(dev, req->dst, sg_nents(req->dst), 2494 DMA_FROM_DEVICE); 2495 if (!error) { 2496 dma_unmap_sg(dev, req->src, sg_nents(req->src), 2497 DMA_TO_DEVICE); 2498 goto err; 2499 } 2500 } 2501 2502 return 0; 2503 err: 2504 dma_unmap_single(dev, reqctx->iv_dma, IV, DMA_BIDIRECTIONAL); 2505 return -ENOMEM; 2506 } 2507 2508 void chcr_aead_dma_unmap(struct device *dev, 2509 struct aead_request *req, 2510 unsigned short op_type) 2511 { 2512 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 2513 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 2514 unsigned int authsize = crypto_aead_authsize(tfm); 2515 int dst_size; 2516 2517 dst_size = req->assoclen + req->cryptlen + (op_type ? 2518 -authsize : authsize); 2519 if (!req->cryptlen || !dst_size) 2520 return; 2521 2522 dma_unmap_single(dev, reqctx->iv_dma, (IV + reqctx->b0_len), 2523 DMA_BIDIRECTIONAL); 2524 if (req->src == req->dst) { 2525 dma_unmap_sg(dev, req->src, sg_nents(req->src), 2526 DMA_BIDIRECTIONAL); 2527 } else { 2528 dma_unmap_sg(dev, req->src, sg_nents(req->src), 2529 DMA_TO_DEVICE); 2530 dma_unmap_sg(dev, req->dst, sg_nents(req->dst), 2531 DMA_FROM_DEVICE); 2532 } 2533 } 2534 2535 void chcr_add_aead_src_ent(struct aead_request *req, 2536 struct ulptx_sgl *ulptx) 2537 { 2538 struct ulptx_walk ulp_walk; 2539 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 2540 2541 if (reqctx->imm) { 2542 u8 *buf = (u8 *)ulptx; 2543 2544 if (reqctx->b0_len) { 2545 memcpy(buf, reqctx->scratch_pad, reqctx->b0_len); 2546 buf += reqctx->b0_len; 2547 } 2548 sg_pcopy_to_buffer(req->src, sg_nents(req->src), 2549 buf, req->cryptlen + req->assoclen, 0); 2550 } else { 2551 ulptx_walk_init(&ulp_walk, ulptx); 2552 if (reqctx->b0_len) 2553 ulptx_walk_add_page(&ulp_walk, reqctx->b0_len, 2554 reqctx->b0_dma); 2555 ulptx_walk_add_sg(&ulp_walk, req->src, req->cryptlen + 2556 req->assoclen, 0); 2557 ulptx_walk_end(&ulp_walk); 2558 } 2559 } 2560 2561 void chcr_add_aead_dst_ent(struct aead_request *req, 2562 struct cpl_rx_phys_dsgl *phys_cpl, 2563 unsigned short qid) 2564 { 2565 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 2566 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 2567 struct dsgl_walk dsgl_walk; 2568 unsigned int authsize = crypto_aead_authsize(tfm); 2569 struct chcr_context *ctx = a_ctx(tfm); 2570 u32 temp; 2571 2572 dsgl_walk_init(&dsgl_walk, phys_cpl); 2573 dsgl_walk_add_page(&dsgl_walk, IV + reqctx->b0_len, reqctx->iv_dma); 2574 temp = req->assoclen + req->cryptlen + 2575 (reqctx->op ? -authsize : authsize); 2576 dsgl_walk_add_sg(&dsgl_walk, req->dst, temp, 0); 2577 dsgl_walk_end(&dsgl_walk, qid, ctx->pci_chan_id); 2578 } 2579 2580 void chcr_add_cipher_src_ent(struct skcipher_request *req, 2581 void *ulptx, 2582 struct cipher_wr_param *wrparam) 2583 { 2584 struct ulptx_walk ulp_walk; 2585 struct chcr_skcipher_req_ctx *reqctx = skcipher_request_ctx(req); 2586 u8 *buf = ulptx; 2587 2588 memcpy(buf, reqctx->iv, IV); 2589 buf += IV; 2590 if (reqctx->imm) { 2591 sg_pcopy_to_buffer(req->src, sg_nents(req->src), 2592 buf, wrparam->bytes, reqctx->processed); 2593 } else { 2594 ulptx_walk_init(&ulp_walk, (struct ulptx_sgl *)buf); 2595 ulptx_walk_add_sg(&ulp_walk, reqctx->srcsg, wrparam->bytes, 2596 reqctx->src_ofst); 2597 reqctx->srcsg = ulp_walk.last_sg; 2598 reqctx->src_ofst = ulp_walk.last_sg_len; 2599 ulptx_walk_end(&ulp_walk); 2600 } 2601 } 2602 2603 void chcr_add_cipher_dst_ent(struct skcipher_request *req, 2604 struct cpl_rx_phys_dsgl *phys_cpl, 2605 struct cipher_wr_param *wrparam, 2606 unsigned short qid) 2607 { 2608 struct chcr_skcipher_req_ctx *reqctx = skcipher_request_ctx(req); 2609 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(wrparam->req); 2610 struct chcr_context *ctx = c_ctx(tfm); 2611 struct dsgl_walk dsgl_walk; 2612 2613 dsgl_walk_init(&dsgl_walk, phys_cpl); 2614 dsgl_walk_add_sg(&dsgl_walk, reqctx->dstsg, wrparam->bytes, 2615 reqctx->dst_ofst); 2616 reqctx->dstsg = dsgl_walk.last_sg; 2617 reqctx->dst_ofst = dsgl_walk.last_sg_len; 2618 2619 dsgl_walk_end(&dsgl_walk, qid, ctx->pci_chan_id); 2620 } 2621 2622 void chcr_add_hash_src_ent(struct ahash_request *req, 2623 struct ulptx_sgl *ulptx, 2624 struct hash_wr_param *param) 2625 { 2626 struct ulptx_walk ulp_walk; 2627 struct chcr_ahash_req_ctx *reqctx = ahash_request_ctx(req); 2628 2629 if (reqctx->hctx_wr.imm) { 2630 u8 *buf = (u8 *)ulptx; 2631 2632 if (param->bfr_len) { 2633 memcpy(buf, reqctx->reqbfr, param->bfr_len); 2634 buf += param->bfr_len; 2635 } 2636 2637 sg_pcopy_to_buffer(reqctx->hctx_wr.srcsg, 2638 sg_nents(reqctx->hctx_wr.srcsg), buf, 2639 param->sg_len, 0); 2640 } else { 2641 ulptx_walk_init(&ulp_walk, ulptx); 2642 if (param->bfr_len) 2643 ulptx_walk_add_page(&ulp_walk, param->bfr_len, 2644 reqctx->hctx_wr.dma_addr); 2645 ulptx_walk_add_sg(&ulp_walk, reqctx->hctx_wr.srcsg, 2646 param->sg_len, reqctx->hctx_wr.src_ofst); 2647 reqctx->hctx_wr.srcsg = ulp_walk.last_sg; 2648 reqctx->hctx_wr.src_ofst = ulp_walk.last_sg_len; 2649 ulptx_walk_end(&ulp_walk); 2650 } 2651 } 2652 2653 int chcr_hash_dma_map(struct device *dev, 2654 struct ahash_request *req) 2655 { 2656 struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); 2657 int error = 0; 2658 2659 if (!req->nbytes) 2660 return 0; 2661 error = dma_map_sg(dev, req->src, sg_nents(req->src), 2662 DMA_TO_DEVICE); 2663 if (!error) 2664 return -ENOMEM; 2665 req_ctx->hctx_wr.is_sg_map = 1; 2666 return 0; 2667 } 2668 2669 void chcr_hash_dma_unmap(struct device *dev, 2670 struct ahash_request *req) 2671 { 2672 struct chcr_ahash_req_ctx *req_ctx = ahash_request_ctx(req); 2673 2674 if (!req->nbytes) 2675 return; 2676 2677 dma_unmap_sg(dev, req->src, sg_nents(req->src), 2678 DMA_TO_DEVICE); 2679 req_ctx->hctx_wr.is_sg_map = 0; 2680 2681 } 2682 2683 int chcr_cipher_dma_map(struct device *dev, 2684 struct skcipher_request *req) 2685 { 2686 int error; 2687 2688 if (req->src == req->dst) { 2689 error = dma_map_sg(dev, req->src, sg_nents(req->src), 2690 DMA_BIDIRECTIONAL); 2691 if (!error) 2692 goto err; 2693 } else { 2694 error = dma_map_sg(dev, req->src, sg_nents(req->src), 2695 DMA_TO_DEVICE); 2696 if (!error) 2697 goto err; 2698 error = dma_map_sg(dev, req->dst, sg_nents(req->dst), 2699 DMA_FROM_DEVICE); 2700 if (!error) { 2701 dma_unmap_sg(dev, req->src, sg_nents(req->src), 2702 DMA_TO_DEVICE); 2703 goto err; 2704 } 2705 } 2706 2707 return 0; 2708 err: 2709 return -ENOMEM; 2710 } 2711 2712 void chcr_cipher_dma_unmap(struct device *dev, 2713 struct skcipher_request *req) 2714 { 2715 if (req->src == req->dst) { 2716 dma_unmap_sg(dev, req->src, sg_nents(req->src), 2717 DMA_BIDIRECTIONAL); 2718 } else { 2719 dma_unmap_sg(dev, req->src, sg_nents(req->src), 2720 DMA_TO_DEVICE); 2721 dma_unmap_sg(dev, req->dst, sg_nents(req->dst), 2722 DMA_FROM_DEVICE); 2723 } 2724 } 2725 2726 static int set_msg_len(u8 *block, unsigned int msglen, int csize) 2727 { 2728 __be32 data; 2729 2730 memset(block, 0, csize); 2731 block += csize; 2732 2733 if (csize >= 4) 2734 csize = 4; 2735 else if (msglen > (unsigned int)(1 << (8 * csize))) 2736 return -EOVERFLOW; 2737 2738 data = cpu_to_be32(msglen); 2739 memcpy(block - csize, (u8 *)&data + 4 - csize, csize); 2740 2741 return 0; 2742 } 2743 2744 static int generate_b0(struct aead_request *req, u8 *ivptr, 2745 unsigned short op_type) 2746 { 2747 unsigned int l, lp, m; 2748 int rc; 2749 struct crypto_aead *aead = crypto_aead_reqtfm(req); 2750 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 2751 u8 *b0 = reqctx->scratch_pad; 2752 2753 m = crypto_aead_authsize(aead); 2754 2755 memcpy(b0, ivptr, 16); 2756 2757 lp = b0[0]; 2758 l = lp + 1; 2759 2760 /* set m, bits 3-5 */ 2761 *b0 |= (8 * ((m - 2) / 2)); 2762 2763 /* set adata, bit 6, if associated data is used */ 2764 if (req->assoclen) 2765 *b0 |= 64; 2766 rc = set_msg_len(b0 + 16 - l, 2767 (op_type == CHCR_DECRYPT_OP) ? 2768 req->cryptlen - m : req->cryptlen, l); 2769 2770 return rc; 2771 } 2772 2773 static inline int crypto_ccm_check_iv(const u8 *iv) 2774 { 2775 /* 2 <= L <= 8, so 1 <= L' <= 7. */ 2776 if (iv[0] < 1 || iv[0] > 7) 2777 return -EINVAL; 2778 2779 return 0; 2780 } 2781 2782 static int ccm_format_packet(struct aead_request *req, 2783 u8 *ivptr, 2784 unsigned int sub_type, 2785 unsigned short op_type, 2786 unsigned int assoclen) 2787 { 2788 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 2789 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 2790 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 2791 int rc = 0; 2792 2793 if (sub_type == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309) { 2794 ivptr[0] = 3; 2795 memcpy(ivptr + 1, &aeadctx->salt[0], 3); 2796 memcpy(ivptr + 4, req->iv, 8); 2797 memset(ivptr + 12, 0, 4); 2798 } else { 2799 memcpy(ivptr, req->iv, 16); 2800 } 2801 if (assoclen) 2802 *((unsigned short *)(reqctx->scratch_pad + 16)) = 2803 htons(assoclen); 2804 2805 rc = generate_b0(req, ivptr, op_type); 2806 /* zero the ctr value */ 2807 memset(ivptr + 15 - ivptr[0], 0, ivptr[0] + 1); 2808 return rc; 2809 } 2810 2811 static void fill_sec_cpl_for_aead(struct cpl_tx_sec_pdu *sec_cpl, 2812 unsigned int dst_size, 2813 struct aead_request *req, 2814 unsigned short op_type) 2815 { 2816 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 2817 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 2818 unsigned int cipher_mode = CHCR_SCMD_CIPHER_MODE_AES_CCM; 2819 unsigned int mac_mode = CHCR_SCMD_AUTH_MODE_CBCMAC; 2820 unsigned int c_id = a_ctx(tfm)->tx_chan_id; 2821 unsigned int ccm_xtra; 2822 unsigned char tag_offset = 0, auth_offset = 0; 2823 unsigned int assoclen; 2824 2825 if (get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309) 2826 assoclen = req->assoclen - 8; 2827 else 2828 assoclen = req->assoclen; 2829 ccm_xtra = CCM_B0_SIZE + 2830 ((assoclen) ? CCM_AAD_FIELD_SIZE : 0); 2831 2832 auth_offset = req->cryptlen ? 2833 (req->assoclen + IV + 1 + ccm_xtra) : 0; 2834 if (op_type == CHCR_DECRYPT_OP) { 2835 if (crypto_aead_authsize(tfm) != req->cryptlen) 2836 tag_offset = crypto_aead_authsize(tfm); 2837 else 2838 auth_offset = 0; 2839 } 2840 2841 2842 sec_cpl->op_ivinsrtofst = FILL_SEC_CPL_OP_IVINSR(c_id, 2843 2, 1); 2844 sec_cpl->pldlen = 2845 htonl(req->assoclen + IV + req->cryptlen + ccm_xtra); 2846 /* For CCM there wil be b0 always. So AAD start will be 1 always */ 2847 sec_cpl->aadstart_cipherstop_hi = FILL_SEC_CPL_CIPHERSTOP_HI( 2848 1 + IV, IV + assoclen + ccm_xtra, 2849 req->assoclen + IV + 1 + ccm_xtra, 0); 2850 2851 sec_cpl->cipherstop_lo_authinsert = FILL_SEC_CPL_AUTHINSERT(0, 2852 auth_offset, tag_offset, 2853 (op_type == CHCR_ENCRYPT_OP) ? 0 : 2854 crypto_aead_authsize(tfm)); 2855 sec_cpl->seqno_numivs = FILL_SEC_CPL_SCMD0_SEQNO(op_type, 2856 (op_type == CHCR_ENCRYPT_OP) ? 0 : 1, 2857 cipher_mode, mac_mode, 2858 aeadctx->hmac_ctrl, IV >> 1); 2859 2860 sec_cpl->ivgen_hdrlen = FILL_SEC_CPL_IVGEN_HDRLEN(0, 0, 1, 0, 2861 0, dst_size); 2862 } 2863 2864 static int aead_ccm_validate_input(unsigned short op_type, 2865 struct aead_request *req, 2866 struct chcr_aead_ctx *aeadctx, 2867 unsigned int sub_type) 2868 { 2869 if (sub_type != CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309) { 2870 if (crypto_ccm_check_iv(req->iv)) { 2871 pr_err("CCM: IV check fails\n"); 2872 return -EINVAL; 2873 } 2874 } else { 2875 if (req->assoclen != 16 && req->assoclen != 20) { 2876 pr_err("RFC4309: Invalid AAD length %d\n", 2877 req->assoclen); 2878 return -EINVAL; 2879 } 2880 } 2881 return 0; 2882 } 2883 2884 static struct sk_buff *create_aead_ccm_wr(struct aead_request *req, 2885 unsigned short qid, 2886 int size) 2887 { 2888 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 2889 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 2890 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 2891 struct sk_buff *skb = NULL; 2892 struct chcr_wr *chcr_req; 2893 struct cpl_rx_phys_dsgl *phys_cpl; 2894 struct ulptx_sgl *ulptx; 2895 unsigned int transhdr_len; 2896 unsigned int dst_size = 0, kctx_len, dnents, temp, snents; 2897 unsigned int sub_type, assoclen = req->assoclen; 2898 unsigned int authsize = crypto_aead_authsize(tfm); 2899 int error = -EINVAL; 2900 u8 *ivptr; 2901 gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : 2902 GFP_ATOMIC; 2903 struct adapter *adap = padap(a_ctx(tfm)->dev); 2904 2905 sub_type = get_aead_subtype(tfm); 2906 if (sub_type == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309) 2907 assoclen -= 8; 2908 reqctx->b0_len = CCM_B0_SIZE + (assoclen ? CCM_AAD_FIELD_SIZE : 0); 2909 error = chcr_aead_common_init(req); 2910 if (error) 2911 return ERR_PTR(error); 2912 2913 error = aead_ccm_validate_input(reqctx->op, req, aeadctx, sub_type); 2914 if (error) 2915 goto err; 2916 dnents = sg_nents_xlen(req->dst, req->assoclen + req->cryptlen 2917 + (reqctx->op ? -authsize : authsize), 2918 CHCR_DST_SG_SIZE, 0); 2919 dnents += MIN_CCM_SG; // For IV and B0 2920 dst_size = get_space_for_phys_dsgl(dnents); 2921 snents = sg_nents_xlen(req->src, req->assoclen + req->cryptlen, 2922 CHCR_SRC_SG_SIZE, 0); 2923 snents += MIN_CCM_SG; //For B0 2924 kctx_len = roundup(aeadctx->enckey_len, 16) * 2; 2925 transhdr_len = CIPHER_TRANSHDR_SIZE(kctx_len, dst_size); 2926 reqctx->imm = (transhdr_len + req->assoclen + req->cryptlen + 2927 reqctx->b0_len) <= SGE_MAX_WR_LEN; 2928 temp = reqctx->imm ? roundup(req->assoclen + req->cryptlen + 2929 reqctx->b0_len, 16) : 2930 (sgl_len(snents) * 8); 2931 transhdr_len += temp; 2932 transhdr_len = roundup(transhdr_len, 16); 2933 2934 if (chcr_aead_need_fallback(req, dnents, T6_MAX_AAD_SIZE - 2935 reqctx->b0_len, transhdr_len, reqctx->op)) { 2936 atomic_inc(&adap->chcr_stats.fallback); 2937 chcr_aead_common_exit(req); 2938 return ERR_PTR(chcr_aead_fallback(req, reqctx->op)); 2939 } 2940 skb = alloc_skb(transhdr_len, flags); 2941 2942 if (!skb) { 2943 error = -ENOMEM; 2944 goto err; 2945 } 2946 2947 chcr_req = __skb_put_zero(skb, transhdr_len); 2948 2949 fill_sec_cpl_for_aead(&chcr_req->sec_cpl, dst_size, req, reqctx->op); 2950 2951 chcr_req->key_ctx.ctx_hdr = aeadctx->key_ctx_hdr; 2952 memcpy(chcr_req->key_ctx.key, aeadctx->key, aeadctx->enckey_len); 2953 memcpy(chcr_req->key_ctx.key + roundup(aeadctx->enckey_len, 16), 2954 aeadctx->key, aeadctx->enckey_len); 2955 2956 phys_cpl = (struct cpl_rx_phys_dsgl *)((u8 *)(chcr_req + 1) + kctx_len); 2957 ivptr = (u8 *)(phys_cpl + 1) + dst_size; 2958 ulptx = (struct ulptx_sgl *)(ivptr + IV); 2959 error = ccm_format_packet(req, ivptr, sub_type, reqctx->op, assoclen); 2960 if (error) 2961 goto dstmap_fail; 2962 chcr_add_aead_dst_ent(req, phys_cpl, qid); 2963 chcr_add_aead_src_ent(req, ulptx); 2964 2965 atomic_inc(&adap->chcr_stats.aead_rqst); 2966 temp = sizeof(struct cpl_rx_phys_dsgl) + dst_size + IV + 2967 kctx_len + (reqctx->imm ? (req->assoclen + req->cryptlen + 2968 reqctx->b0_len) : 0); 2969 create_wreq(a_ctx(tfm), chcr_req, &req->base, reqctx->imm, 0, 2970 transhdr_len, temp, 0); 2971 reqctx->skb = skb; 2972 2973 return skb; 2974 dstmap_fail: 2975 kfree_skb(skb); 2976 err: 2977 chcr_aead_common_exit(req); 2978 return ERR_PTR(error); 2979 } 2980 2981 static struct sk_buff *create_gcm_wr(struct aead_request *req, 2982 unsigned short qid, 2983 int size) 2984 { 2985 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 2986 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 2987 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 2988 struct sk_buff *skb = NULL; 2989 struct chcr_wr *chcr_req; 2990 struct cpl_rx_phys_dsgl *phys_cpl; 2991 struct ulptx_sgl *ulptx; 2992 unsigned int transhdr_len, dnents = 0, snents; 2993 unsigned int dst_size = 0, temp = 0, kctx_len, assoclen = req->assoclen; 2994 unsigned int authsize = crypto_aead_authsize(tfm); 2995 int error = -EINVAL; 2996 u8 *ivptr; 2997 gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : 2998 GFP_ATOMIC; 2999 struct adapter *adap = padap(a_ctx(tfm)->dev); 3000 3001 if (get_aead_subtype(tfm) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106) 3002 assoclen = req->assoclen - 8; 3003 3004 reqctx->b0_len = 0; 3005 error = chcr_aead_common_init(req); 3006 if (error) 3007 return ERR_PTR(error); 3008 dnents = sg_nents_xlen(req->dst, req->assoclen + req->cryptlen + 3009 (reqctx->op ? -authsize : authsize), 3010 CHCR_DST_SG_SIZE, 0); 3011 snents = sg_nents_xlen(req->src, req->assoclen + req->cryptlen, 3012 CHCR_SRC_SG_SIZE, 0); 3013 dnents += MIN_GCM_SG; // For IV 3014 dst_size = get_space_for_phys_dsgl(dnents); 3015 kctx_len = roundup(aeadctx->enckey_len, 16) + AEAD_H_SIZE; 3016 transhdr_len = CIPHER_TRANSHDR_SIZE(kctx_len, dst_size); 3017 reqctx->imm = (transhdr_len + req->assoclen + req->cryptlen) <= 3018 SGE_MAX_WR_LEN; 3019 temp = reqctx->imm ? roundup(req->assoclen + req->cryptlen, 16) : 3020 (sgl_len(snents) * 8); 3021 transhdr_len += temp; 3022 transhdr_len = roundup(transhdr_len, 16); 3023 if (chcr_aead_need_fallback(req, dnents, T6_MAX_AAD_SIZE, 3024 transhdr_len, reqctx->op)) { 3025 3026 atomic_inc(&adap->chcr_stats.fallback); 3027 chcr_aead_common_exit(req); 3028 return ERR_PTR(chcr_aead_fallback(req, reqctx->op)); 3029 } 3030 skb = alloc_skb(transhdr_len, flags); 3031 if (!skb) { 3032 error = -ENOMEM; 3033 goto err; 3034 } 3035 3036 chcr_req = __skb_put_zero(skb, transhdr_len); 3037 3038 //Offset of tag from end 3039 temp = (reqctx->op == CHCR_ENCRYPT_OP) ? 0 : authsize; 3040 chcr_req->sec_cpl.op_ivinsrtofst = FILL_SEC_CPL_OP_IVINSR( 3041 a_ctx(tfm)->tx_chan_id, 2, 1); 3042 chcr_req->sec_cpl.pldlen = 3043 htonl(req->assoclen + IV + req->cryptlen); 3044 chcr_req->sec_cpl.aadstart_cipherstop_hi = FILL_SEC_CPL_CIPHERSTOP_HI( 3045 assoclen ? 1 + IV : 0, 3046 assoclen ? IV + assoclen : 0, 3047 req->assoclen + IV + 1, 0); 3048 chcr_req->sec_cpl.cipherstop_lo_authinsert = 3049 FILL_SEC_CPL_AUTHINSERT(0, req->assoclen + IV + 1, 3050 temp, temp); 3051 chcr_req->sec_cpl.seqno_numivs = 3052 FILL_SEC_CPL_SCMD0_SEQNO(reqctx->op, (reqctx->op == 3053 CHCR_ENCRYPT_OP) ? 1 : 0, 3054 CHCR_SCMD_CIPHER_MODE_AES_GCM, 3055 CHCR_SCMD_AUTH_MODE_GHASH, 3056 aeadctx->hmac_ctrl, IV >> 1); 3057 chcr_req->sec_cpl.ivgen_hdrlen = FILL_SEC_CPL_IVGEN_HDRLEN(0, 0, 1, 3058 0, 0, dst_size); 3059 chcr_req->key_ctx.ctx_hdr = aeadctx->key_ctx_hdr; 3060 memcpy(chcr_req->key_ctx.key, aeadctx->key, aeadctx->enckey_len); 3061 memcpy(chcr_req->key_ctx.key + roundup(aeadctx->enckey_len, 16), 3062 GCM_CTX(aeadctx)->ghash_h, AEAD_H_SIZE); 3063 3064 phys_cpl = (struct cpl_rx_phys_dsgl *)((u8 *)(chcr_req + 1) + kctx_len); 3065 ivptr = (u8 *)(phys_cpl + 1) + dst_size; 3066 /* prepare a 16 byte iv */ 3067 /* S A L T | IV | 0x00000001 */ 3068 if (get_aead_subtype(tfm) == 3069 CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106) { 3070 memcpy(ivptr, aeadctx->salt, 4); 3071 memcpy(ivptr + 4, req->iv, GCM_RFC4106_IV_SIZE); 3072 } else { 3073 memcpy(ivptr, req->iv, GCM_AES_IV_SIZE); 3074 } 3075 *((unsigned int *)(ivptr + 12)) = htonl(0x01); 3076 3077 ulptx = (struct ulptx_sgl *)(ivptr + 16); 3078 3079 chcr_add_aead_dst_ent(req, phys_cpl, qid); 3080 chcr_add_aead_src_ent(req, ulptx); 3081 atomic_inc(&adap->chcr_stats.aead_rqst); 3082 temp = sizeof(struct cpl_rx_phys_dsgl) + dst_size + IV + 3083 kctx_len + (reqctx->imm ? (req->assoclen + req->cryptlen) : 0); 3084 create_wreq(a_ctx(tfm), chcr_req, &req->base, reqctx->imm, size, 3085 transhdr_len, temp, reqctx->verify); 3086 reqctx->skb = skb; 3087 return skb; 3088 3089 err: 3090 chcr_aead_common_exit(req); 3091 return ERR_PTR(error); 3092 } 3093 3094 3095 3096 static int chcr_aead_cra_init(struct crypto_aead *tfm) 3097 { 3098 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 3099 struct aead_alg *alg = crypto_aead_alg(tfm); 3100 3101 aeadctx->sw_cipher = crypto_alloc_aead(alg->base.cra_name, 0, 3102 CRYPTO_ALG_NEED_FALLBACK | 3103 CRYPTO_ALG_ASYNC); 3104 if (IS_ERR(aeadctx->sw_cipher)) 3105 return PTR_ERR(aeadctx->sw_cipher); 3106 crypto_aead_set_reqsize(tfm, max(sizeof(struct chcr_aead_reqctx), 3107 sizeof(struct aead_request) + 3108 crypto_aead_reqsize(aeadctx->sw_cipher))); 3109 return chcr_device_init(a_ctx(tfm)); 3110 } 3111 3112 static void chcr_aead_cra_exit(struct crypto_aead *tfm) 3113 { 3114 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 3115 3116 crypto_free_aead(aeadctx->sw_cipher); 3117 } 3118 3119 static int chcr_authenc_null_setauthsize(struct crypto_aead *tfm, 3120 unsigned int authsize) 3121 { 3122 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 3123 3124 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NOP; 3125 aeadctx->mayverify = VERIFY_HW; 3126 return crypto_aead_setauthsize(aeadctx->sw_cipher, authsize); 3127 } 3128 static int chcr_authenc_setauthsize(struct crypto_aead *tfm, 3129 unsigned int authsize) 3130 { 3131 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 3132 u32 maxauth = crypto_aead_maxauthsize(tfm); 3133 3134 /*SHA1 authsize in ipsec is 12 instead of 10 i.e maxauthsize / 2 is not 3135 * true for sha1. authsize == 12 condition should be before 3136 * authsize == (maxauth >> 1) 3137 */ 3138 if (authsize == ICV_4) { 3139 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL1; 3140 aeadctx->mayverify = VERIFY_HW; 3141 } else if (authsize == ICV_6) { 3142 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL2; 3143 aeadctx->mayverify = VERIFY_HW; 3144 } else if (authsize == ICV_10) { 3145 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_TRUNC_RFC4366; 3146 aeadctx->mayverify = VERIFY_HW; 3147 } else if (authsize == ICV_12) { 3148 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT; 3149 aeadctx->mayverify = VERIFY_HW; 3150 } else if (authsize == ICV_14) { 3151 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL3; 3152 aeadctx->mayverify = VERIFY_HW; 3153 } else if (authsize == (maxauth >> 1)) { 3154 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_DIV2; 3155 aeadctx->mayverify = VERIFY_HW; 3156 } else if (authsize == maxauth) { 3157 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC; 3158 aeadctx->mayverify = VERIFY_HW; 3159 } else { 3160 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC; 3161 aeadctx->mayverify = VERIFY_SW; 3162 } 3163 return crypto_aead_setauthsize(aeadctx->sw_cipher, authsize); 3164 } 3165 3166 3167 static int chcr_gcm_setauthsize(struct crypto_aead *tfm, unsigned int authsize) 3168 { 3169 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 3170 3171 switch (authsize) { 3172 case ICV_4: 3173 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL1; 3174 aeadctx->mayverify = VERIFY_HW; 3175 break; 3176 case ICV_8: 3177 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_DIV2; 3178 aeadctx->mayverify = VERIFY_HW; 3179 break; 3180 case ICV_12: 3181 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT; 3182 aeadctx->mayverify = VERIFY_HW; 3183 break; 3184 case ICV_14: 3185 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL3; 3186 aeadctx->mayverify = VERIFY_HW; 3187 break; 3188 case ICV_16: 3189 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC; 3190 aeadctx->mayverify = VERIFY_HW; 3191 break; 3192 case ICV_13: 3193 case ICV_15: 3194 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC; 3195 aeadctx->mayverify = VERIFY_SW; 3196 break; 3197 default: 3198 3199 crypto_tfm_set_flags((struct crypto_tfm *) tfm, 3200 CRYPTO_TFM_RES_BAD_KEY_LEN); 3201 return -EINVAL; 3202 } 3203 return crypto_aead_setauthsize(aeadctx->sw_cipher, authsize); 3204 } 3205 3206 static int chcr_4106_4309_setauthsize(struct crypto_aead *tfm, 3207 unsigned int authsize) 3208 { 3209 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 3210 3211 switch (authsize) { 3212 case ICV_8: 3213 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_DIV2; 3214 aeadctx->mayverify = VERIFY_HW; 3215 break; 3216 case ICV_12: 3217 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT; 3218 aeadctx->mayverify = VERIFY_HW; 3219 break; 3220 case ICV_16: 3221 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC; 3222 aeadctx->mayverify = VERIFY_HW; 3223 break; 3224 default: 3225 crypto_tfm_set_flags((struct crypto_tfm *)tfm, 3226 CRYPTO_TFM_RES_BAD_KEY_LEN); 3227 return -EINVAL; 3228 } 3229 return crypto_aead_setauthsize(aeadctx->sw_cipher, authsize); 3230 } 3231 3232 static int chcr_ccm_setauthsize(struct crypto_aead *tfm, 3233 unsigned int authsize) 3234 { 3235 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 3236 3237 switch (authsize) { 3238 case ICV_4: 3239 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL1; 3240 aeadctx->mayverify = VERIFY_HW; 3241 break; 3242 case ICV_6: 3243 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL2; 3244 aeadctx->mayverify = VERIFY_HW; 3245 break; 3246 case ICV_8: 3247 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_DIV2; 3248 aeadctx->mayverify = VERIFY_HW; 3249 break; 3250 case ICV_10: 3251 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_TRUNC_RFC4366; 3252 aeadctx->mayverify = VERIFY_HW; 3253 break; 3254 case ICV_12: 3255 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT; 3256 aeadctx->mayverify = VERIFY_HW; 3257 break; 3258 case ICV_14: 3259 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_PL3; 3260 aeadctx->mayverify = VERIFY_HW; 3261 break; 3262 case ICV_16: 3263 aeadctx->hmac_ctrl = CHCR_SCMD_HMAC_CTRL_NO_TRUNC; 3264 aeadctx->mayverify = VERIFY_HW; 3265 break; 3266 default: 3267 crypto_tfm_set_flags((struct crypto_tfm *)tfm, 3268 CRYPTO_TFM_RES_BAD_KEY_LEN); 3269 return -EINVAL; 3270 } 3271 return crypto_aead_setauthsize(aeadctx->sw_cipher, authsize); 3272 } 3273 3274 static int chcr_ccm_common_setkey(struct crypto_aead *aead, 3275 const u8 *key, 3276 unsigned int keylen) 3277 { 3278 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(aead)); 3279 unsigned char ck_size, mk_size; 3280 int key_ctx_size = 0; 3281 3282 key_ctx_size = sizeof(struct _key_ctx) + roundup(keylen, 16) * 2; 3283 if (keylen == AES_KEYSIZE_128) { 3284 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; 3285 mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_128; 3286 } else if (keylen == AES_KEYSIZE_192) { 3287 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192; 3288 mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_192; 3289 } else if (keylen == AES_KEYSIZE_256) { 3290 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256; 3291 mk_size = CHCR_KEYCTX_MAC_KEY_SIZE_256; 3292 } else { 3293 crypto_tfm_set_flags((struct crypto_tfm *)aead, 3294 CRYPTO_TFM_RES_BAD_KEY_LEN); 3295 aeadctx->enckey_len = 0; 3296 return -EINVAL; 3297 } 3298 aeadctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, mk_size, 0, 0, 3299 key_ctx_size >> 4); 3300 memcpy(aeadctx->key, key, keylen); 3301 aeadctx->enckey_len = keylen; 3302 3303 return 0; 3304 } 3305 3306 static int chcr_aead_ccm_setkey(struct crypto_aead *aead, 3307 const u8 *key, 3308 unsigned int keylen) 3309 { 3310 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(aead)); 3311 int error; 3312 3313 crypto_aead_clear_flags(aeadctx->sw_cipher, CRYPTO_TFM_REQ_MASK); 3314 crypto_aead_set_flags(aeadctx->sw_cipher, crypto_aead_get_flags(aead) & 3315 CRYPTO_TFM_REQ_MASK); 3316 error = crypto_aead_setkey(aeadctx->sw_cipher, key, keylen); 3317 crypto_aead_clear_flags(aead, CRYPTO_TFM_RES_MASK); 3318 crypto_aead_set_flags(aead, crypto_aead_get_flags(aeadctx->sw_cipher) & 3319 CRYPTO_TFM_RES_MASK); 3320 if (error) 3321 return error; 3322 return chcr_ccm_common_setkey(aead, key, keylen); 3323 } 3324 3325 static int chcr_aead_rfc4309_setkey(struct crypto_aead *aead, const u8 *key, 3326 unsigned int keylen) 3327 { 3328 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(aead)); 3329 int error; 3330 3331 if (keylen < 3) { 3332 crypto_tfm_set_flags((struct crypto_tfm *)aead, 3333 CRYPTO_TFM_RES_BAD_KEY_LEN); 3334 aeadctx->enckey_len = 0; 3335 return -EINVAL; 3336 } 3337 crypto_aead_clear_flags(aeadctx->sw_cipher, CRYPTO_TFM_REQ_MASK); 3338 crypto_aead_set_flags(aeadctx->sw_cipher, crypto_aead_get_flags(aead) & 3339 CRYPTO_TFM_REQ_MASK); 3340 error = crypto_aead_setkey(aeadctx->sw_cipher, key, keylen); 3341 crypto_aead_clear_flags(aead, CRYPTO_TFM_RES_MASK); 3342 crypto_aead_set_flags(aead, crypto_aead_get_flags(aeadctx->sw_cipher) & 3343 CRYPTO_TFM_RES_MASK); 3344 if (error) 3345 return error; 3346 keylen -= 3; 3347 memcpy(aeadctx->salt, key + keylen, 3); 3348 return chcr_ccm_common_setkey(aead, key, keylen); 3349 } 3350 3351 static int chcr_gcm_setkey(struct crypto_aead *aead, const u8 *key, 3352 unsigned int keylen) 3353 { 3354 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(aead)); 3355 struct chcr_gcm_ctx *gctx = GCM_CTX(aeadctx); 3356 unsigned int ck_size; 3357 int ret = 0, key_ctx_size = 0; 3358 struct crypto_aes_ctx aes; 3359 3360 aeadctx->enckey_len = 0; 3361 crypto_aead_clear_flags(aeadctx->sw_cipher, CRYPTO_TFM_REQ_MASK); 3362 crypto_aead_set_flags(aeadctx->sw_cipher, crypto_aead_get_flags(aead) 3363 & CRYPTO_TFM_REQ_MASK); 3364 ret = crypto_aead_setkey(aeadctx->sw_cipher, key, keylen); 3365 crypto_aead_clear_flags(aead, CRYPTO_TFM_RES_MASK); 3366 crypto_aead_set_flags(aead, crypto_aead_get_flags(aeadctx->sw_cipher) & 3367 CRYPTO_TFM_RES_MASK); 3368 if (ret) 3369 goto out; 3370 3371 if (get_aead_subtype(aead) == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106 && 3372 keylen > 3) { 3373 keylen -= 4; /* nonce/salt is present in the last 4 bytes */ 3374 memcpy(aeadctx->salt, key + keylen, 4); 3375 } 3376 if (keylen == AES_KEYSIZE_128) { 3377 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; 3378 } else if (keylen == AES_KEYSIZE_192) { 3379 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192; 3380 } else if (keylen == AES_KEYSIZE_256) { 3381 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256; 3382 } else { 3383 crypto_tfm_set_flags((struct crypto_tfm *)aead, 3384 CRYPTO_TFM_RES_BAD_KEY_LEN); 3385 pr_err("GCM: Invalid key length %d\n", keylen); 3386 ret = -EINVAL; 3387 goto out; 3388 } 3389 3390 memcpy(aeadctx->key, key, keylen); 3391 aeadctx->enckey_len = keylen; 3392 key_ctx_size = sizeof(struct _key_ctx) + roundup(keylen, 16) + 3393 AEAD_H_SIZE; 3394 aeadctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, 3395 CHCR_KEYCTX_MAC_KEY_SIZE_128, 3396 0, 0, 3397 key_ctx_size >> 4); 3398 /* Calculate the H = CIPH(K, 0 repeated 16 times). 3399 * It will go in key context 3400 */ 3401 ret = aes_expandkey(&aes, key, keylen); 3402 if (ret) { 3403 aeadctx->enckey_len = 0; 3404 goto out; 3405 } 3406 memset(gctx->ghash_h, 0, AEAD_H_SIZE); 3407 aes_encrypt(&aes, gctx->ghash_h, gctx->ghash_h); 3408 memzero_explicit(&aes, sizeof(aes)); 3409 3410 out: 3411 return ret; 3412 } 3413 3414 static int chcr_authenc_setkey(struct crypto_aead *authenc, const u8 *key, 3415 unsigned int keylen) 3416 { 3417 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(authenc)); 3418 struct chcr_authenc_ctx *actx = AUTHENC_CTX(aeadctx); 3419 /* it contains auth and cipher key both*/ 3420 struct crypto_authenc_keys keys; 3421 unsigned int bs, subtype; 3422 unsigned int max_authsize = crypto_aead_alg(authenc)->maxauthsize; 3423 int err = 0, i, key_ctx_len = 0; 3424 unsigned char ck_size = 0; 3425 unsigned char pad[CHCR_HASH_MAX_BLOCK_SIZE_128] = { 0 }; 3426 struct crypto_shash *base_hash = ERR_PTR(-EINVAL); 3427 struct algo_param param; 3428 int align; 3429 u8 *o_ptr = NULL; 3430 3431 crypto_aead_clear_flags(aeadctx->sw_cipher, CRYPTO_TFM_REQ_MASK); 3432 crypto_aead_set_flags(aeadctx->sw_cipher, crypto_aead_get_flags(authenc) 3433 & CRYPTO_TFM_REQ_MASK); 3434 err = crypto_aead_setkey(aeadctx->sw_cipher, key, keylen); 3435 crypto_aead_clear_flags(authenc, CRYPTO_TFM_RES_MASK); 3436 crypto_aead_set_flags(authenc, crypto_aead_get_flags(aeadctx->sw_cipher) 3437 & CRYPTO_TFM_RES_MASK); 3438 if (err) 3439 goto out; 3440 3441 if (crypto_authenc_extractkeys(&keys, key, keylen) != 0) { 3442 crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN); 3443 goto out; 3444 } 3445 3446 if (get_alg_config(¶m, max_authsize)) { 3447 pr_err("chcr : Unsupported digest size\n"); 3448 goto out; 3449 } 3450 subtype = get_aead_subtype(authenc); 3451 if (subtype == CRYPTO_ALG_SUB_TYPE_CTR_SHA || 3452 subtype == CRYPTO_ALG_SUB_TYPE_CTR_NULL) { 3453 if (keys.enckeylen < CTR_RFC3686_NONCE_SIZE) 3454 goto out; 3455 memcpy(aeadctx->nonce, keys.enckey + (keys.enckeylen 3456 - CTR_RFC3686_NONCE_SIZE), CTR_RFC3686_NONCE_SIZE); 3457 keys.enckeylen -= CTR_RFC3686_NONCE_SIZE; 3458 } 3459 if (keys.enckeylen == AES_KEYSIZE_128) { 3460 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; 3461 } else if (keys.enckeylen == AES_KEYSIZE_192) { 3462 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192; 3463 } else if (keys.enckeylen == AES_KEYSIZE_256) { 3464 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256; 3465 } else { 3466 pr_err("chcr : Unsupported cipher key\n"); 3467 goto out; 3468 } 3469 3470 /* Copy only encryption key. We use authkey to generate h(ipad) and 3471 * h(opad) so authkey is not needed again. authkeylen size have the 3472 * size of the hash digest size. 3473 */ 3474 memcpy(aeadctx->key, keys.enckey, keys.enckeylen); 3475 aeadctx->enckey_len = keys.enckeylen; 3476 if (subtype == CRYPTO_ALG_SUB_TYPE_CBC_SHA || 3477 subtype == CRYPTO_ALG_SUB_TYPE_CBC_NULL) { 3478 3479 get_aes_decrypt_key(actx->dec_rrkey, aeadctx->key, 3480 aeadctx->enckey_len << 3); 3481 } 3482 base_hash = chcr_alloc_shash(max_authsize); 3483 if (IS_ERR(base_hash)) { 3484 pr_err("chcr : Base driver cannot be loaded\n"); 3485 aeadctx->enckey_len = 0; 3486 memzero_explicit(&keys, sizeof(keys)); 3487 return -EINVAL; 3488 } 3489 { 3490 SHASH_DESC_ON_STACK(shash, base_hash); 3491 3492 shash->tfm = base_hash; 3493 bs = crypto_shash_blocksize(base_hash); 3494 align = KEYCTX_ALIGN_PAD(max_authsize); 3495 o_ptr = actx->h_iopad + param.result_size + align; 3496 3497 if (keys.authkeylen > bs) { 3498 err = crypto_shash_digest(shash, keys.authkey, 3499 keys.authkeylen, 3500 o_ptr); 3501 if (err) { 3502 pr_err("chcr : Base driver cannot be loaded\n"); 3503 goto out; 3504 } 3505 keys.authkeylen = max_authsize; 3506 } else 3507 memcpy(o_ptr, keys.authkey, keys.authkeylen); 3508 3509 /* Compute the ipad-digest*/ 3510 memset(pad + keys.authkeylen, 0, bs - keys.authkeylen); 3511 memcpy(pad, o_ptr, keys.authkeylen); 3512 for (i = 0; i < bs >> 2; i++) 3513 *((unsigned int *)pad + i) ^= IPAD_DATA; 3514 3515 if (chcr_compute_partial_hash(shash, pad, actx->h_iopad, 3516 max_authsize)) 3517 goto out; 3518 /* Compute the opad-digest */ 3519 memset(pad + keys.authkeylen, 0, bs - keys.authkeylen); 3520 memcpy(pad, o_ptr, keys.authkeylen); 3521 for (i = 0; i < bs >> 2; i++) 3522 *((unsigned int *)pad + i) ^= OPAD_DATA; 3523 3524 if (chcr_compute_partial_hash(shash, pad, o_ptr, max_authsize)) 3525 goto out; 3526 3527 /* convert the ipad and opad digest to network order */ 3528 chcr_change_order(actx->h_iopad, param.result_size); 3529 chcr_change_order(o_ptr, param.result_size); 3530 key_ctx_len = sizeof(struct _key_ctx) + 3531 roundup(keys.enckeylen, 16) + 3532 (param.result_size + align) * 2; 3533 aeadctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, param.mk_size, 3534 0, 1, key_ctx_len >> 4); 3535 actx->auth_mode = param.auth_mode; 3536 chcr_free_shash(base_hash); 3537 3538 memzero_explicit(&keys, sizeof(keys)); 3539 return 0; 3540 } 3541 out: 3542 aeadctx->enckey_len = 0; 3543 memzero_explicit(&keys, sizeof(keys)); 3544 if (!IS_ERR(base_hash)) 3545 chcr_free_shash(base_hash); 3546 return -EINVAL; 3547 } 3548 3549 static int chcr_aead_digest_null_setkey(struct crypto_aead *authenc, 3550 const u8 *key, unsigned int keylen) 3551 { 3552 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(authenc)); 3553 struct chcr_authenc_ctx *actx = AUTHENC_CTX(aeadctx); 3554 struct crypto_authenc_keys keys; 3555 int err; 3556 /* it contains auth and cipher key both*/ 3557 unsigned int subtype; 3558 int key_ctx_len = 0; 3559 unsigned char ck_size = 0; 3560 3561 crypto_aead_clear_flags(aeadctx->sw_cipher, CRYPTO_TFM_REQ_MASK); 3562 crypto_aead_set_flags(aeadctx->sw_cipher, crypto_aead_get_flags(authenc) 3563 & CRYPTO_TFM_REQ_MASK); 3564 err = crypto_aead_setkey(aeadctx->sw_cipher, key, keylen); 3565 crypto_aead_clear_flags(authenc, CRYPTO_TFM_RES_MASK); 3566 crypto_aead_set_flags(authenc, crypto_aead_get_flags(aeadctx->sw_cipher) 3567 & CRYPTO_TFM_RES_MASK); 3568 if (err) 3569 goto out; 3570 3571 if (crypto_authenc_extractkeys(&keys, key, keylen) != 0) { 3572 crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN); 3573 goto out; 3574 } 3575 subtype = get_aead_subtype(authenc); 3576 if (subtype == CRYPTO_ALG_SUB_TYPE_CTR_SHA || 3577 subtype == CRYPTO_ALG_SUB_TYPE_CTR_NULL) { 3578 if (keys.enckeylen < CTR_RFC3686_NONCE_SIZE) 3579 goto out; 3580 memcpy(aeadctx->nonce, keys.enckey + (keys.enckeylen 3581 - CTR_RFC3686_NONCE_SIZE), CTR_RFC3686_NONCE_SIZE); 3582 keys.enckeylen -= CTR_RFC3686_NONCE_SIZE; 3583 } 3584 if (keys.enckeylen == AES_KEYSIZE_128) { 3585 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_128; 3586 } else if (keys.enckeylen == AES_KEYSIZE_192) { 3587 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_192; 3588 } else if (keys.enckeylen == AES_KEYSIZE_256) { 3589 ck_size = CHCR_KEYCTX_CIPHER_KEY_SIZE_256; 3590 } else { 3591 pr_err("chcr : Unsupported cipher key %d\n", keys.enckeylen); 3592 goto out; 3593 } 3594 memcpy(aeadctx->key, keys.enckey, keys.enckeylen); 3595 aeadctx->enckey_len = keys.enckeylen; 3596 if (subtype == CRYPTO_ALG_SUB_TYPE_CBC_SHA || 3597 subtype == CRYPTO_ALG_SUB_TYPE_CBC_NULL) { 3598 get_aes_decrypt_key(actx->dec_rrkey, aeadctx->key, 3599 aeadctx->enckey_len << 3); 3600 } 3601 key_ctx_len = sizeof(struct _key_ctx) + roundup(keys.enckeylen, 16); 3602 3603 aeadctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, CHCR_KEYCTX_NO_KEY, 0, 3604 0, key_ctx_len >> 4); 3605 actx->auth_mode = CHCR_SCMD_AUTH_MODE_NOP; 3606 memzero_explicit(&keys, sizeof(keys)); 3607 return 0; 3608 out: 3609 aeadctx->enckey_len = 0; 3610 memzero_explicit(&keys, sizeof(keys)); 3611 return -EINVAL; 3612 } 3613 3614 static int chcr_aead_op(struct aead_request *req, 3615 int size, 3616 create_wr_t create_wr_fn) 3617 { 3618 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 3619 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 3620 struct uld_ctx *u_ctx; 3621 struct sk_buff *skb; 3622 int isfull = 0; 3623 struct chcr_dev *cdev; 3624 3625 cdev = a_ctx(tfm)->dev; 3626 if (!cdev) { 3627 pr_err("chcr : %s : No crypto device.\n", __func__); 3628 return -ENXIO; 3629 } 3630 3631 if (chcr_inc_wrcount(cdev)) { 3632 /* Detach state for CHCR means lldi or padap is freed. 3633 * We cannot increment fallback here. 3634 */ 3635 return chcr_aead_fallback(req, reqctx->op); 3636 } 3637 3638 u_ctx = ULD_CTX(a_ctx(tfm)); 3639 if (cxgb4_is_crypto_q_full(u_ctx->lldi.ports[0], 3640 a_ctx(tfm)->tx_qidx)) { 3641 isfull = 1; 3642 if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) { 3643 chcr_dec_wrcount(cdev); 3644 return -ENOSPC; 3645 } 3646 } 3647 3648 /* Form a WR from req */ 3649 skb = create_wr_fn(req, u_ctx->lldi.rxq_ids[a_ctx(tfm)->rx_qidx], size); 3650 3651 if (IS_ERR_OR_NULL(skb)) { 3652 chcr_dec_wrcount(cdev); 3653 return PTR_ERR_OR_ZERO(skb); 3654 } 3655 3656 skb->dev = u_ctx->lldi.ports[0]; 3657 set_wr_txq(skb, CPL_PRIORITY_DATA, a_ctx(tfm)->tx_qidx); 3658 chcr_send_wr(skb); 3659 return isfull ? -EBUSY : -EINPROGRESS; 3660 } 3661 3662 static int chcr_aead_encrypt(struct aead_request *req) 3663 { 3664 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 3665 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 3666 3667 reqctx->verify = VERIFY_HW; 3668 reqctx->op = CHCR_ENCRYPT_OP; 3669 3670 switch (get_aead_subtype(tfm)) { 3671 case CRYPTO_ALG_SUB_TYPE_CTR_SHA: 3672 case CRYPTO_ALG_SUB_TYPE_CBC_SHA: 3673 case CRYPTO_ALG_SUB_TYPE_CBC_NULL: 3674 case CRYPTO_ALG_SUB_TYPE_CTR_NULL: 3675 return chcr_aead_op(req, 0, create_authenc_wr); 3676 case CRYPTO_ALG_SUB_TYPE_AEAD_CCM: 3677 case CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309: 3678 return chcr_aead_op(req, 0, create_aead_ccm_wr); 3679 default: 3680 return chcr_aead_op(req, 0, create_gcm_wr); 3681 } 3682 } 3683 3684 static int chcr_aead_decrypt(struct aead_request *req) 3685 { 3686 struct crypto_aead *tfm = crypto_aead_reqtfm(req); 3687 struct chcr_aead_ctx *aeadctx = AEAD_CTX(a_ctx(tfm)); 3688 struct chcr_aead_reqctx *reqctx = aead_request_ctx(req); 3689 int size; 3690 3691 if (aeadctx->mayverify == VERIFY_SW) { 3692 size = crypto_aead_maxauthsize(tfm); 3693 reqctx->verify = VERIFY_SW; 3694 } else { 3695 size = 0; 3696 reqctx->verify = VERIFY_HW; 3697 } 3698 reqctx->op = CHCR_DECRYPT_OP; 3699 switch (get_aead_subtype(tfm)) { 3700 case CRYPTO_ALG_SUB_TYPE_CBC_SHA: 3701 case CRYPTO_ALG_SUB_TYPE_CTR_SHA: 3702 case CRYPTO_ALG_SUB_TYPE_CBC_NULL: 3703 case CRYPTO_ALG_SUB_TYPE_CTR_NULL: 3704 return chcr_aead_op(req, size, create_authenc_wr); 3705 case CRYPTO_ALG_SUB_TYPE_AEAD_CCM: 3706 case CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309: 3707 return chcr_aead_op(req, size, create_aead_ccm_wr); 3708 default: 3709 return chcr_aead_op(req, size, create_gcm_wr); 3710 } 3711 } 3712 3713 static struct chcr_alg_template driver_algs[] = { 3714 /* AES-CBC */ 3715 { 3716 .type = CRYPTO_ALG_TYPE_SKCIPHER | CRYPTO_ALG_SUB_TYPE_CBC, 3717 .is_registered = 0, 3718 .alg.skcipher = { 3719 .base.cra_name = "cbc(aes)", 3720 .base.cra_driver_name = "cbc-aes-chcr", 3721 .base.cra_blocksize = AES_BLOCK_SIZE, 3722 3723 .init = chcr_init_tfm, 3724 .exit = chcr_exit_tfm, 3725 .min_keysize = AES_MIN_KEY_SIZE, 3726 .max_keysize = AES_MAX_KEY_SIZE, 3727 .ivsize = AES_BLOCK_SIZE, 3728 .setkey = chcr_aes_cbc_setkey, 3729 .encrypt = chcr_aes_encrypt, 3730 .decrypt = chcr_aes_decrypt, 3731 } 3732 }, 3733 { 3734 .type = CRYPTO_ALG_TYPE_SKCIPHER | CRYPTO_ALG_SUB_TYPE_XTS, 3735 .is_registered = 0, 3736 .alg.skcipher = { 3737 .base.cra_name = "xts(aes)", 3738 .base.cra_driver_name = "xts-aes-chcr", 3739 .base.cra_blocksize = AES_BLOCK_SIZE, 3740 3741 .init = chcr_init_tfm, 3742 .exit = chcr_exit_tfm, 3743 .min_keysize = 2 * AES_MIN_KEY_SIZE, 3744 .max_keysize = 2 * AES_MAX_KEY_SIZE, 3745 .ivsize = AES_BLOCK_SIZE, 3746 .setkey = chcr_aes_xts_setkey, 3747 .encrypt = chcr_aes_encrypt, 3748 .decrypt = chcr_aes_decrypt, 3749 } 3750 }, 3751 { 3752 .type = CRYPTO_ALG_TYPE_SKCIPHER | CRYPTO_ALG_SUB_TYPE_CTR, 3753 .is_registered = 0, 3754 .alg.skcipher = { 3755 .base.cra_name = "ctr(aes)", 3756 .base.cra_driver_name = "ctr-aes-chcr", 3757 .base.cra_blocksize = 1, 3758 3759 .init = chcr_init_tfm, 3760 .exit = chcr_exit_tfm, 3761 .min_keysize = AES_MIN_KEY_SIZE, 3762 .max_keysize = AES_MAX_KEY_SIZE, 3763 .ivsize = AES_BLOCK_SIZE, 3764 .setkey = chcr_aes_ctr_setkey, 3765 .encrypt = chcr_aes_encrypt, 3766 .decrypt = chcr_aes_decrypt, 3767 } 3768 }, 3769 { 3770 .type = CRYPTO_ALG_TYPE_SKCIPHER | 3771 CRYPTO_ALG_SUB_TYPE_CTR_RFC3686, 3772 .is_registered = 0, 3773 .alg.skcipher = { 3774 .base.cra_name = "rfc3686(ctr(aes))", 3775 .base.cra_driver_name = "rfc3686-ctr-aes-chcr", 3776 .base.cra_blocksize = 1, 3777 3778 .init = chcr_rfc3686_init, 3779 .exit = chcr_exit_tfm, 3780 .min_keysize = AES_MIN_KEY_SIZE + CTR_RFC3686_NONCE_SIZE, 3781 .max_keysize = AES_MAX_KEY_SIZE + CTR_RFC3686_NONCE_SIZE, 3782 .ivsize = CTR_RFC3686_IV_SIZE, 3783 .setkey = chcr_aes_rfc3686_setkey, 3784 .encrypt = chcr_aes_encrypt, 3785 .decrypt = chcr_aes_decrypt, 3786 } 3787 }, 3788 /* SHA */ 3789 { 3790 .type = CRYPTO_ALG_TYPE_AHASH, 3791 .is_registered = 0, 3792 .alg.hash = { 3793 .halg.digestsize = SHA1_DIGEST_SIZE, 3794 .halg.base = { 3795 .cra_name = "sha1", 3796 .cra_driver_name = "sha1-chcr", 3797 .cra_blocksize = SHA1_BLOCK_SIZE, 3798 } 3799 } 3800 }, 3801 { 3802 .type = CRYPTO_ALG_TYPE_AHASH, 3803 .is_registered = 0, 3804 .alg.hash = { 3805 .halg.digestsize = SHA256_DIGEST_SIZE, 3806 .halg.base = { 3807 .cra_name = "sha256", 3808 .cra_driver_name = "sha256-chcr", 3809 .cra_blocksize = SHA256_BLOCK_SIZE, 3810 } 3811 } 3812 }, 3813 { 3814 .type = CRYPTO_ALG_TYPE_AHASH, 3815 .is_registered = 0, 3816 .alg.hash = { 3817 .halg.digestsize = SHA224_DIGEST_SIZE, 3818 .halg.base = { 3819 .cra_name = "sha224", 3820 .cra_driver_name = "sha224-chcr", 3821 .cra_blocksize = SHA224_BLOCK_SIZE, 3822 } 3823 } 3824 }, 3825 { 3826 .type = CRYPTO_ALG_TYPE_AHASH, 3827 .is_registered = 0, 3828 .alg.hash = { 3829 .halg.digestsize = SHA384_DIGEST_SIZE, 3830 .halg.base = { 3831 .cra_name = "sha384", 3832 .cra_driver_name = "sha384-chcr", 3833 .cra_blocksize = SHA384_BLOCK_SIZE, 3834 } 3835 } 3836 }, 3837 { 3838 .type = CRYPTO_ALG_TYPE_AHASH, 3839 .is_registered = 0, 3840 .alg.hash = { 3841 .halg.digestsize = SHA512_DIGEST_SIZE, 3842 .halg.base = { 3843 .cra_name = "sha512", 3844 .cra_driver_name = "sha512-chcr", 3845 .cra_blocksize = SHA512_BLOCK_SIZE, 3846 } 3847 } 3848 }, 3849 /* HMAC */ 3850 { 3851 .type = CRYPTO_ALG_TYPE_HMAC, 3852 .is_registered = 0, 3853 .alg.hash = { 3854 .halg.digestsize = SHA1_DIGEST_SIZE, 3855 .halg.base = { 3856 .cra_name = "hmac(sha1)", 3857 .cra_driver_name = "hmac-sha1-chcr", 3858 .cra_blocksize = SHA1_BLOCK_SIZE, 3859 } 3860 } 3861 }, 3862 { 3863 .type = CRYPTO_ALG_TYPE_HMAC, 3864 .is_registered = 0, 3865 .alg.hash = { 3866 .halg.digestsize = SHA224_DIGEST_SIZE, 3867 .halg.base = { 3868 .cra_name = "hmac(sha224)", 3869 .cra_driver_name = "hmac-sha224-chcr", 3870 .cra_blocksize = SHA224_BLOCK_SIZE, 3871 } 3872 } 3873 }, 3874 { 3875 .type = CRYPTO_ALG_TYPE_HMAC, 3876 .is_registered = 0, 3877 .alg.hash = { 3878 .halg.digestsize = SHA256_DIGEST_SIZE, 3879 .halg.base = { 3880 .cra_name = "hmac(sha256)", 3881 .cra_driver_name = "hmac-sha256-chcr", 3882 .cra_blocksize = SHA256_BLOCK_SIZE, 3883 } 3884 } 3885 }, 3886 { 3887 .type = CRYPTO_ALG_TYPE_HMAC, 3888 .is_registered = 0, 3889 .alg.hash = { 3890 .halg.digestsize = SHA384_DIGEST_SIZE, 3891 .halg.base = { 3892 .cra_name = "hmac(sha384)", 3893 .cra_driver_name = "hmac-sha384-chcr", 3894 .cra_blocksize = SHA384_BLOCK_SIZE, 3895 } 3896 } 3897 }, 3898 { 3899 .type = CRYPTO_ALG_TYPE_HMAC, 3900 .is_registered = 0, 3901 .alg.hash = { 3902 .halg.digestsize = SHA512_DIGEST_SIZE, 3903 .halg.base = { 3904 .cra_name = "hmac(sha512)", 3905 .cra_driver_name = "hmac-sha512-chcr", 3906 .cra_blocksize = SHA512_BLOCK_SIZE, 3907 } 3908 } 3909 }, 3910 /* Add AEAD Algorithms */ 3911 { 3912 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_GCM, 3913 .is_registered = 0, 3914 .alg.aead = { 3915 .base = { 3916 .cra_name = "gcm(aes)", 3917 .cra_driver_name = "gcm-aes-chcr", 3918 .cra_blocksize = 1, 3919 .cra_priority = CHCR_AEAD_PRIORITY, 3920 .cra_ctxsize = sizeof(struct chcr_context) + 3921 sizeof(struct chcr_aead_ctx) + 3922 sizeof(struct chcr_gcm_ctx), 3923 }, 3924 .ivsize = GCM_AES_IV_SIZE, 3925 .maxauthsize = GHASH_DIGEST_SIZE, 3926 .setkey = chcr_gcm_setkey, 3927 .setauthsize = chcr_gcm_setauthsize, 3928 } 3929 }, 3930 { 3931 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106, 3932 .is_registered = 0, 3933 .alg.aead = { 3934 .base = { 3935 .cra_name = "rfc4106(gcm(aes))", 3936 .cra_driver_name = "rfc4106-gcm-aes-chcr", 3937 .cra_blocksize = 1, 3938 .cra_priority = CHCR_AEAD_PRIORITY + 1, 3939 .cra_ctxsize = sizeof(struct chcr_context) + 3940 sizeof(struct chcr_aead_ctx) + 3941 sizeof(struct chcr_gcm_ctx), 3942 3943 }, 3944 .ivsize = GCM_RFC4106_IV_SIZE, 3945 .maxauthsize = GHASH_DIGEST_SIZE, 3946 .setkey = chcr_gcm_setkey, 3947 .setauthsize = chcr_4106_4309_setauthsize, 3948 } 3949 }, 3950 { 3951 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_CCM, 3952 .is_registered = 0, 3953 .alg.aead = { 3954 .base = { 3955 .cra_name = "ccm(aes)", 3956 .cra_driver_name = "ccm-aes-chcr", 3957 .cra_blocksize = 1, 3958 .cra_priority = CHCR_AEAD_PRIORITY, 3959 .cra_ctxsize = sizeof(struct chcr_context) + 3960 sizeof(struct chcr_aead_ctx), 3961 3962 }, 3963 .ivsize = AES_BLOCK_SIZE, 3964 .maxauthsize = GHASH_DIGEST_SIZE, 3965 .setkey = chcr_aead_ccm_setkey, 3966 .setauthsize = chcr_ccm_setauthsize, 3967 } 3968 }, 3969 { 3970 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309, 3971 .is_registered = 0, 3972 .alg.aead = { 3973 .base = { 3974 .cra_name = "rfc4309(ccm(aes))", 3975 .cra_driver_name = "rfc4309-ccm-aes-chcr", 3976 .cra_blocksize = 1, 3977 .cra_priority = CHCR_AEAD_PRIORITY + 1, 3978 .cra_ctxsize = sizeof(struct chcr_context) + 3979 sizeof(struct chcr_aead_ctx), 3980 3981 }, 3982 .ivsize = 8, 3983 .maxauthsize = GHASH_DIGEST_SIZE, 3984 .setkey = chcr_aead_rfc4309_setkey, 3985 .setauthsize = chcr_4106_4309_setauthsize, 3986 } 3987 }, 3988 { 3989 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_CBC_SHA, 3990 .is_registered = 0, 3991 .alg.aead = { 3992 .base = { 3993 .cra_name = "authenc(hmac(sha1),cbc(aes))", 3994 .cra_driver_name = 3995 "authenc-hmac-sha1-cbc-aes-chcr", 3996 .cra_blocksize = AES_BLOCK_SIZE, 3997 .cra_priority = CHCR_AEAD_PRIORITY, 3998 .cra_ctxsize = sizeof(struct chcr_context) + 3999 sizeof(struct chcr_aead_ctx) + 4000 sizeof(struct chcr_authenc_ctx), 4001 4002 }, 4003 .ivsize = AES_BLOCK_SIZE, 4004 .maxauthsize = SHA1_DIGEST_SIZE, 4005 .setkey = chcr_authenc_setkey, 4006 .setauthsize = chcr_authenc_setauthsize, 4007 } 4008 }, 4009 { 4010 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_CBC_SHA, 4011 .is_registered = 0, 4012 .alg.aead = { 4013 .base = { 4014 4015 .cra_name = "authenc(hmac(sha256),cbc(aes))", 4016 .cra_driver_name = 4017 "authenc-hmac-sha256-cbc-aes-chcr", 4018 .cra_blocksize = AES_BLOCK_SIZE, 4019 .cra_priority = CHCR_AEAD_PRIORITY, 4020 .cra_ctxsize = sizeof(struct chcr_context) + 4021 sizeof(struct chcr_aead_ctx) + 4022 sizeof(struct chcr_authenc_ctx), 4023 4024 }, 4025 .ivsize = AES_BLOCK_SIZE, 4026 .maxauthsize = SHA256_DIGEST_SIZE, 4027 .setkey = chcr_authenc_setkey, 4028 .setauthsize = chcr_authenc_setauthsize, 4029 } 4030 }, 4031 { 4032 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_CBC_SHA, 4033 .is_registered = 0, 4034 .alg.aead = { 4035 .base = { 4036 .cra_name = "authenc(hmac(sha224),cbc(aes))", 4037 .cra_driver_name = 4038 "authenc-hmac-sha224-cbc-aes-chcr", 4039 .cra_blocksize = AES_BLOCK_SIZE, 4040 .cra_priority = CHCR_AEAD_PRIORITY, 4041 .cra_ctxsize = sizeof(struct chcr_context) + 4042 sizeof(struct chcr_aead_ctx) + 4043 sizeof(struct chcr_authenc_ctx), 4044 }, 4045 .ivsize = AES_BLOCK_SIZE, 4046 .maxauthsize = SHA224_DIGEST_SIZE, 4047 .setkey = chcr_authenc_setkey, 4048 .setauthsize = chcr_authenc_setauthsize, 4049 } 4050 }, 4051 { 4052 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_CBC_SHA, 4053 .is_registered = 0, 4054 .alg.aead = { 4055 .base = { 4056 .cra_name = "authenc(hmac(sha384),cbc(aes))", 4057 .cra_driver_name = 4058 "authenc-hmac-sha384-cbc-aes-chcr", 4059 .cra_blocksize = AES_BLOCK_SIZE, 4060 .cra_priority = CHCR_AEAD_PRIORITY, 4061 .cra_ctxsize = sizeof(struct chcr_context) + 4062 sizeof(struct chcr_aead_ctx) + 4063 sizeof(struct chcr_authenc_ctx), 4064 4065 }, 4066 .ivsize = AES_BLOCK_SIZE, 4067 .maxauthsize = SHA384_DIGEST_SIZE, 4068 .setkey = chcr_authenc_setkey, 4069 .setauthsize = chcr_authenc_setauthsize, 4070 } 4071 }, 4072 { 4073 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_CBC_SHA, 4074 .is_registered = 0, 4075 .alg.aead = { 4076 .base = { 4077 .cra_name = "authenc(hmac(sha512),cbc(aes))", 4078 .cra_driver_name = 4079 "authenc-hmac-sha512-cbc-aes-chcr", 4080 .cra_blocksize = AES_BLOCK_SIZE, 4081 .cra_priority = CHCR_AEAD_PRIORITY, 4082 .cra_ctxsize = sizeof(struct chcr_context) + 4083 sizeof(struct chcr_aead_ctx) + 4084 sizeof(struct chcr_authenc_ctx), 4085 4086 }, 4087 .ivsize = AES_BLOCK_SIZE, 4088 .maxauthsize = SHA512_DIGEST_SIZE, 4089 .setkey = chcr_authenc_setkey, 4090 .setauthsize = chcr_authenc_setauthsize, 4091 } 4092 }, 4093 { 4094 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_CBC_NULL, 4095 .is_registered = 0, 4096 .alg.aead = { 4097 .base = { 4098 .cra_name = "authenc(digest_null,cbc(aes))", 4099 .cra_driver_name = 4100 "authenc-digest_null-cbc-aes-chcr", 4101 .cra_blocksize = AES_BLOCK_SIZE, 4102 .cra_priority = CHCR_AEAD_PRIORITY, 4103 .cra_ctxsize = sizeof(struct chcr_context) + 4104 sizeof(struct chcr_aead_ctx) + 4105 sizeof(struct chcr_authenc_ctx), 4106 4107 }, 4108 .ivsize = AES_BLOCK_SIZE, 4109 .maxauthsize = 0, 4110 .setkey = chcr_aead_digest_null_setkey, 4111 .setauthsize = chcr_authenc_null_setauthsize, 4112 } 4113 }, 4114 { 4115 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_CTR_SHA, 4116 .is_registered = 0, 4117 .alg.aead = { 4118 .base = { 4119 .cra_name = "authenc(hmac(sha1),rfc3686(ctr(aes)))", 4120 .cra_driver_name = 4121 "authenc-hmac-sha1-rfc3686-ctr-aes-chcr", 4122 .cra_blocksize = 1, 4123 .cra_priority = CHCR_AEAD_PRIORITY, 4124 .cra_ctxsize = sizeof(struct chcr_context) + 4125 sizeof(struct chcr_aead_ctx) + 4126 sizeof(struct chcr_authenc_ctx), 4127 4128 }, 4129 .ivsize = CTR_RFC3686_IV_SIZE, 4130 .maxauthsize = SHA1_DIGEST_SIZE, 4131 .setkey = chcr_authenc_setkey, 4132 .setauthsize = chcr_authenc_setauthsize, 4133 } 4134 }, 4135 { 4136 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_CTR_SHA, 4137 .is_registered = 0, 4138 .alg.aead = { 4139 .base = { 4140 4141 .cra_name = "authenc(hmac(sha256),rfc3686(ctr(aes)))", 4142 .cra_driver_name = 4143 "authenc-hmac-sha256-rfc3686-ctr-aes-chcr", 4144 .cra_blocksize = 1, 4145 .cra_priority = CHCR_AEAD_PRIORITY, 4146 .cra_ctxsize = sizeof(struct chcr_context) + 4147 sizeof(struct chcr_aead_ctx) + 4148 sizeof(struct chcr_authenc_ctx), 4149 4150 }, 4151 .ivsize = CTR_RFC3686_IV_SIZE, 4152 .maxauthsize = SHA256_DIGEST_SIZE, 4153 .setkey = chcr_authenc_setkey, 4154 .setauthsize = chcr_authenc_setauthsize, 4155 } 4156 }, 4157 { 4158 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_CTR_SHA, 4159 .is_registered = 0, 4160 .alg.aead = { 4161 .base = { 4162 .cra_name = "authenc(hmac(sha224),rfc3686(ctr(aes)))", 4163 .cra_driver_name = 4164 "authenc-hmac-sha224-rfc3686-ctr-aes-chcr", 4165 .cra_blocksize = 1, 4166 .cra_priority = CHCR_AEAD_PRIORITY, 4167 .cra_ctxsize = sizeof(struct chcr_context) + 4168 sizeof(struct chcr_aead_ctx) + 4169 sizeof(struct chcr_authenc_ctx), 4170 }, 4171 .ivsize = CTR_RFC3686_IV_SIZE, 4172 .maxauthsize = SHA224_DIGEST_SIZE, 4173 .setkey = chcr_authenc_setkey, 4174 .setauthsize = chcr_authenc_setauthsize, 4175 } 4176 }, 4177 { 4178 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_CTR_SHA, 4179 .is_registered = 0, 4180 .alg.aead = { 4181 .base = { 4182 .cra_name = "authenc(hmac(sha384),rfc3686(ctr(aes)))", 4183 .cra_driver_name = 4184 "authenc-hmac-sha384-rfc3686-ctr-aes-chcr", 4185 .cra_blocksize = 1, 4186 .cra_priority = CHCR_AEAD_PRIORITY, 4187 .cra_ctxsize = sizeof(struct chcr_context) + 4188 sizeof(struct chcr_aead_ctx) + 4189 sizeof(struct chcr_authenc_ctx), 4190 4191 }, 4192 .ivsize = CTR_RFC3686_IV_SIZE, 4193 .maxauthsize = SHA384_DIGEST_SIZE, 4194 .setkey = chcr_authenc_setkey, 4195 .setauthsize = chcr_authenc_setauthsize, 4196 } 4197 }, 4198 { 4199 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_CTR_SHA, 4200 .is_registered = 0, 4201 .alg.aead = { 4202 .base = { 4203 .cra_name = "authenc(hmac(sha512),rfc3686(ctr(aes)))", 4204 .cra_driver_name = 4205 "authenc-hmac-sha512-rfc3686-ctr-aes-chcr", 4206 .cra_blocksize = 1, 4207 .cra_priority = CHCR_AEAD_PRIORITY, 4208 .cra_ctxsize = sizeof(struct chcr_context) + 4209 sizeof(struct chcr_aead_ctx) + 4210 sizeof(struct chcr_authenc_ctx), 4211 4212 }, 4213 .ivsize = CTR_RFC3686_IV_SIZE, 4214 .maxauthsize = SHA512_DIGEST_SIZE, 4215 .setkey = chcr_authenc_setkey, 4216 .setauthsize = chcr_authenc_setauthsize, 4217 } 4218 }, 4219 { 4220 .type = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_SUB_TYPE_CTR_NULL, 4221 .is_registered = 0, 4222 .alg.aead = { 4223 .base = { 4224 .cra_name = "authenc(digest_null,rfc3686(ctr(aes)))", 4225 .cra_driver_name = 4226 "authenc-digest_null-rfc3686-ctr-aes-chcr", 4227 .cra_blocksize = 1, 4228 .cra_priority = CHCR_AEAD_PRIORITY, 4229 .cra_ctxsize = sizeof(struct chcr_context) + 4230 sizeof(struct chcr_aead_ctx) + 4231 sizeof(struct chcr_authenc_ctx), 4232 4233 }, 4234 .ivsize = CTR_RFC3686_IV_SIZE, 4235 .maxauthsize = 0, 4236 .setkey = chcr_aead_digest_null_setkey, 4237 .setauthsize = chcr_authenc_null_setauthsize, 4238 } 4239 }, 4240 }; 4241 4242 /* 4243 * chcr_unregister_alg - Deregister crypto algorithms with 4244 * kernel framework. 4245 */ 4246 static int chcr_unregister_alg(void) 4247 { 4248 int i; 4249 4250 for (i = 0; i < ARRAY_SIZE(driver_algs); i++) { 4251 switch (driver_algs[i].type & CRYPTO_ALG_TYPE_MASK) { 4252 case CRYPTO_ALG_TYPE_SKCIPHER: 4253 if (driver_algs[i].is_registered) 4254 crypto_unregister_skcipher( 4255 &driver_algs[i].alg.skcipher); 4256 break; 4257 case CRYPTO_ALG_TYPE_AEAD: 4258 if (driver_algs[i].is_registered) 4259 crypto_unregister_aead( 4260 &driver_algs[i].alg.aead); 4261 break; 4262 case CRYPTO_ALG_TYPE_AHASH: 4263 if (driver_algs[i].is_registered) 4264 crypto_unregister_ahash( 4265 &driver_algs[i].alg.hash); 4266 break; 4267 } 4268 driver_algs[i].is_registered = 0; 4269 } 4270 return 0; 4271 } 4272 4273 #define SZ_AHASH_CTX sizeof(struct chcr_context) 4274 #define SZ_AHASH_H_CTX (sizeof(struct chcr_context) + sizeof(struct hmac_ctx)) 4275 #define SZ_AHASH_REQ_CTX sizeof(struct chcr_ahash_req_ctx) 4276 4277 /* 4278 * chcr_register_alg - Register crypto algorithms with kernel framework. 4279 */ 4280 static int chcr_register_alg(void) 4281 { 4282 struct crypto_alg ai; 4283 struct ahash_alg *a_hash; 4284 int err = 0, i; 4285 char *name = NULL; 4286 4287 for (i = 0; i < ARRAY_SIZE(driver_algs); i++) { 4288 if (driver_algs[i].is_registered) 4289 continue; 4290 switch (driver_algs[i].type & CRYPTO_ALG_TYPE_MASK) { 4291 case CRYPTO_ALG_TYPE_SKCIPHER: 4292 driver_algs[i].alg.skcipher.base.cra_priority = 4293 CHCR_CRA_PRIORITY; 4294 driver_algs[i].alg.skcipher.base.cra_module = THIS_MODULE; 4295 driver_algs[i].alg.skcipher.base.cra_flags = 4296 CRYPTO_ALG_TYPE_SKCIPHER | CRYPTO_ALG_ASYNC | 4297 CRYPTO_ALG_NEED_FALLBACK; 4298 driver_algs[i].alg.skcipher.base.cra_ctxsize = 4299 sizeof(struct chcr_context) + 4300 sizeof(struct ablk_ctx); 4301 driver_algs[i].alg.skcipher.base.cra_alignmask = 0; 4302 4303 err = crypto_register_skcipher(&driver_algs[i].alg.skcipher); 4304 name = driver_algs[i].alg.skcipher.base.cra_driver_name; 4305 break; 4306 case CRYPTO_ALG_TYPE_AEAD: 4307 driver_algs[i].alg.aead.base.cra_flags = 4308 CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK; 4309 driver_algs[i].alg.aead.encrypt = chcr_aead_encrypt; 4310 driver_algs[i].alg.aead.decrypt = chcr_aead_decrypt; 4311 driver_algs[i].alg.aead.init = chcr_aead_cra_init; 4312 driver_algs[i].alg.aead.exit = chcr_aead_cra_exit; 4313 driver_algs[i].alg.aead.base.cra_module = THIS_MODULE; 4314 err = crypto_register_aead(&driver_algs[i].alg.aead); 4315 name = driver_algs[i].alg.aead.base.cra_driver_name; 4316 break; 4317 case CRYPTO_ALG_TYPE_AHASH: 4318 a_hash = &driver_algs[i].alg.hash; 4319 a_hash->update = chcr_ahash_update; 4320 a_hash->final = chcr_ahash_final; 4321 a_hash->finup = chcr_ahash_finup; 4322 a_hash->digest = chcr_ahash_digest; 4323 a_hash->export = chcr_ahash_export; 4324 a_hash->import = chcr_ahash_import; 4325 a_hash->halg.statesize = SZ_AHASH_REQ_CTX; 4326 a_hash->halg.base.cra_priority = CHCR_CRA_PRIORITY; 4327 a_hash->halg.base.cra_module = THIS_MODULE; 4328 a_hash->halg.base.cra_flags = CRYPTO_ALG_ASYNC; 4329 a_hash->halg.base.cra_alignmask = 0; 4330 a_hash->halg.base.cra_exit = NULL; 4331 4332 if (driver_algs[i].type == CRYPTO_ALG_TYPE_HMAC) { 4333 a_hash->halg.base.cra_init = chcr_hmac_cra_init; 4334 a_hash->halg.base.cra_exit = chcr_hmac_cra_exit; 4335 a_hash->init = chcr_hmac_init; 4336 a_hash->setkey = chcr_ahash_setkey; 4337 a_hash->halg.base.cra_ctxsize = SZ_AHASH_H_CTX; 4338 } else { 4339 a_hash->init = chcr_sha_init; 4340 a_hash->halg.base.cra_ctxsize = SZ_AHASH_CTX; 4341 a_hash->halg.base.cra_init = chcr_sha_cra_init; 4342 } 4343 err = crypto_register_ahash(&driver_algs[i].alg.hash); 4344 ai = driver_algs[i].alg.hash.halg.base; 4345 name = ai.cra_driver_name; 4346 break; 4347 } 4348 if (err) { 4349 pr_err("chcr : %s : Algorithm registration failed\n", 4350 name); 4351 goto register_err; 4352 } else { 4353 driver_algs[i].is_registered = 1; 4354 } 4355 } 4356 return 0; 4357 4358 register_err: 4359 chcr_unregister_alg(); 4360 return err; 4361 } 4362 4363 /* 4364 * start_crypto - Register the crypto algorithms. 4365 * This should called once when the first device comesup. After this 4366 * kernel will start calling driver APIs for crypto operations. 4367 */ 4368 int start_crypto(void) 4369 { 4370 return chcr_register_alg(); 4371 } 4372 4373 /* 4374 * stop_crypto - Deregister all the crypto algorithms with kernel. 4375 * This should be called once when the last device goes down. After this 4376 * kernel will not call the driver API for crypto operations. 4377 */ 4378 int stop_crypto(void) 4379 { 4380 chcr_unregister_alg(); 4381 return 0; 4382 } 4383