1 // SPDX-License-Identifier: GPL-2.0-only 2 /* n2_core.c: Niagara2 Stream Processing Unit (SPU) crypto support. 3 * 4 * Copyright (C) 2010, 2011 David S. Miller <davem@davemloft.net> 5 */ 6 7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 8 9 #include <linux/kernel.h> 10 #include <linux/module.h> 11 #include <linux/of.h> 12 #include <linux/of_device.h> 13 #include <linux/cpumask.h> 14 #include <linux/slab.h> 15 #include <linux/interrupt.h> 16 #include <linux/crypto.h> 17 #include <crypto/md5.h> 18 #include <crypto/sha.h> 19 #include <crypto/aes.h> 20 #include <crypto/internal/des.h> 21 #include <linux/mutex.h> 22 #include <linux/delay.h> 23 #include <linux/sched.h> 24 25 #include <crypto/internal/hash.h> 26 #include <crypto/internal/skcipher.h> 27 #include <crypto/scatterwalk.h> 28 #include <crypto/algapi.h> 29 30 #include <asm/hypervisor.h> 31 #include <asm/mdesc.h> 32 33 #include "n2_core.h" 34 35 #define DRV_MODULE_NAME "n2_crypto" 36 #define DRV_MODULE_VERSION "0.2" 37 #define DRV_MODULE_RELDATE "July 28, 2011" 38 39 static const char version[] = 40 DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; 41 42 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); 43 MODULE_DESCRIPTION("Niagara2 Crypto driver"); 44 MODULE_LICENSE("GPL"); 45 MODULE_VERSION(DRV_MODULE_VERSION); 46 47 #define N2_CRA_PRIORITY 200 48 49 static DEFINE_MUTEX(spu_lock); 50 51 struct spu_queue { 52 cpumask_t sharing; 53 unsigned long qhandle; 54 55 spinlock_t lock; 56 u8 q_type; 57 void *q; 58 unsigned long head; 59 unsigned long tail; 60 struct list_head jobs; 61 62 unsigned long devino; 63 64 char irq_name[32]; 65 unsigned int irq; 66 67 struct list_head list; 68 }; 69 70 struct spu_qreg { 71 struct spu_queue *queue; 72 unsigned long type; 73 }; 74 75 static struct spu_queue **cpu_to_cwq; 76 static struct spu_queue **cpu_to_mau; 77 78 static unsigned long spu_next_offset(struct spu_queue *q, unsigned long off) 79 { 80 if (q->q_type == HV_NCS_QTYPE_MAU) { 81 off += MAU_ENTRY_SIZE; 82 if (off == (MAU_ENTRY_SIZE * MAU_NUM_ENTRIES)) 83 off = 0; 84 } else { 85 off += CWQ_ENTRY_SIZE; 86 if (off == (CWQ_ENTRY_SIZE * CWQ_NUM_ENTRIES)) 87 off = 0; 88 } 89 return off; 90 } 91 92 struct n2_request_common { 93 struct list_head entry; 94 unsigned int offset; 95 }; 96 #define OFFSET_NOT_RUNNING (~(unsigned int)0) 97 98 /* An async job request records the final tail value it used in 99 * n2_request_common->offset, test to see if that offset is in 100 * the range old_head, new_head, inclusive. 101 */ 102 static inline bool job_finished(struct spu_queue *q, unsigned int offset, 103 unsigned long old_head, unsigned long new_head) 104 { 105 if (old_head <= new_head) { 106 if (offset > old_head && offset <= new_head) 107 return true; 108 } else { 109 if (offset > old_head || offset <= new_head) 110 return true; 111 } 112 return false; 113 } 114 115 /* When the HEAD marker is unequal to the actual HEAD, we get 116 * a virtual device INO interrupt. We should process the 117 * completed CWQ entries and adjust the HEAD marker to clear 118 * the IRQ. 119 */ 120 static irqreturn_t cwq_intr(int irq, void *dev_id) 121 { 122 unsigned long off, new_head, hv_ret; 123 struct spu_queue *q = dev_id; 124 125 pr_err("CPU[%d]: Got CWQ interrupt for qhdl[%lx]\n", 126 smp_processor_id(), q->qhandle); 127 128 spin_lock(&q->lock); 129 130 hv_ret = sun4v_ncs_gethead(q->qhandle, &new_head); 131 132 pr_err("CPU[%d]: CWQ gethead[%lx] hv_ret[%lu]\n", 133 smp_processor_id(), new_head, hv_ret); 134 135 for (off = q->head; off != new_head; off = spu_next_offset(q, off)) { 136 /* XXX ... XXX */ 137 } 138 139 hv_ret = sun4v_ncs_sethead_marker(q->qhandle, new_head); 140 if (hv_ret == HV_EOK) 141 q->head = new_head; 142 143 spin_unlock(&q->lock); 144 145 return IRQ_HANDLED; 146 } 147 148 static irqreturn_t mau_intr(int irq, void *dev_id) 149 { 150 struct spu_queue *q = dev_id; 151 unsigned long head, hv_ret; 152 153 spin_lock(&q->lock); 154 155 pr_err("CPU[%d]: Got MAU interrupt for qhdl[%lx]\n", 156 smp_processor_id(), q->qhandle); 157 158 hv_ret = sun4v_ncs_gethead(q->qhandle, &head); 159 160 pr_err("CPU[%d]: MAU gethead[%lx] hv_ret[%lu]\n", 161 smp_processor_id(), head, hv_ret); 162 163 sun4v_ncs_sethead_marker(q->qhandle, head); 164 165 spin_unlock(&q->lock); 166 167 return IRQ_HANDLED; 168 } 169 170 static void *spu_queue_next(struct spu_queue *q, void *cur) 171 { 172 return q->q + spu_next_offset(q, cur - q->q); 173 } 174 175 static int spu_queue_num_free(struct spu_queue *q) 176 { 177 unsigned long head = q->head; 178 unsigned long tail = q->tail; 179 unsigned long end = (CWQ_ENTRY_SIZE * CWQ_NUM_ENTRIES); 180 unsigned long diff; 181 182 if (head > tail) 183 diff = head - tail; 184 else 185 diff = (end - tail) + head; 186 187 return (diff / CWQ_ENTRY_SIZE) - 1; 188 } 189 190 static void *spu_queue_alloc(struct spu_queue *q, int num_entries) 191 { 192 int avail = spu_queue_num_free(q); 193 194 if (avail >= num_entries) 195 return q->q + q->tail; 196 197 return NULL; 198 } 199 200 static unsigned long spu_queue_submit(struct spu_queue *q, void *last) 201 { 202 unsigned long hv_ret, new_tail; 203 204 new_tail = spu_next_offset(q, last - q->q); 205 206 hv_ret = sun4v_ncs_settail(q->qhandle, new_tail); 207 if (hv_ret == HV_EOK) 208 q->tail = new_tail; 209 return hv_ret; 210 } 211 212 static u64 control_word_base(unsigned int len, unsigned int hmac_key_len, 213 int enc_type, int auth_type, 214 unsigned int hash_len, 215 bool sfas, bool sob, bool eob, bool encrypt, 216 int opcode) 217 { 218 u64 word = (len - 1) & CONTROL_LEN; 219 220 word |= ((u64) opcode << CONTROL_OPCODE_SHIFT); 221 word |= ((u64) enc_type << CONTROL_ENC_TYPE_SHIFT); 222 word |= ((u64) auth_type << CONTROL_AUTH_TYPE_SHIFT); 223 if (sfas) 224 word |= CONTROL_STORE_FINAL_AUTH_STATE; 225 if (sob) 226 word |= CONTROL_START_OF_BLOCK; 227 if (eob) 228 word |= CONTROL_END_OF_BLOCK; 229 if (encrypt) 230 word |= CONTROL_ENCRYPT; 231 if (hmac_key_len) 232 word |= ((u64) (hmac_key_len - 1)) << CONTROL_HMAC_KEY_LEN_SHIFT; 233 if (hash_len) 234 word |= ((u64) (hash_len - 1)) << CONTROL_HASH_LEN_SHIFT; 235 236 return word; 237 } 238 239 #if 0 240 static inline bool n2_should_run_async(struct spu_queue *qp, int this_len) 241 { 242 if (this_len >= 64 || 243 qp->head != qp->tail) 244 return true; 245 return false; 246 } 247 #endif 248 249 struct n2_ahash_alg { 250 struct list_head entry; 251 const u8 *hash_zero; 252 const u32 *hash_init; 253 u8 hw_op_hashsz; 254 u8 digest_size; 255 u8 auth_type; 256 u8 hmac_type; 257 struct ahash_alg alg; 258 }; 259 260 static inline struct n2_ahash_alg *n2_ahash_alg(struct crypto_tfm *tfm) 261 { 262 struct crypto_alg *alg = tfm->__crt_alg; 263 struct ahash_alg *ahash_alg; 264 265 ahash_alg = container_of(alg, struct ahash_alg, halg.base); 266 267 return container_of(ahash_alg, struct n2_ahash_alg, alg); 268 } 269 270 struct n2_hmac_alg { 271 const char *child_alg; 272 struct n2_ahash_alg derived; 273 }; 274 275 static inline struct n2_hmac_alg *n2_hmac_alg(struct crypto_tfm *tfm) 276 { 277 struct crypto_alg *alg = tfm->__crt_alg; 278 struct ahash_alg *ahash_alg; 279 280 ahash_alg = container_of(alg, struct ahash_alg, halg.base); 281 282 return container_of(ahash_alg, struct n2_hmac_alg, derived.alg); 283 } 284 285 struct n2_hash_ctx { 286 struct crypto_ahash *fallback_tfm; 287 }; 288 289 #define N2_HASH_KEY_MAX 32 /* HW limit for all HMAC requests */ 290 291 struct n2_hmac_ctx { 292 struct n2_hash_ctx base; 293 294 struct crypto_shash *child_shash; 295 296 int hash_key_len; 297 unsigned char hash_key[N2_HASH_KEY_MAX]; 298 }; 299 300 struct n2_hash_req_ctx { 301 union { 302 struct md5_state md5; 303 struct sha1_state sha1; 304 struct sha256_state sha256; 305 } u; 306 307 struct ahash_request fallback_req; 308 }; 309 310 static int n2_hash_async_init(struct ahash_request *req) 311 { 312 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 313 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 314 struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm); 315 316 ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm); 317 rctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; 318 319 return crypto_ahash_init(&rctx->fallback_req); 320 } 321 322 static int n2_hash_async_update(struct ahash_request *req) 323 { 324 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 325 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 326 struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm); 327 328 ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm); 329 rctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; 330 rctx->fallback_req.nbytes = req->nbytes; 331 rctx->fallback_req.src = req->src; 332 333 return crypto_ahash_update(&rctx->fallback_req); 334 } 335 336 static int n2_hash_async_final(struct ahash_request *req) 337 { 338 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 339 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 340 struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm); 341 342 ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm); 343 rctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; 344 rctx->fallback_req.result = req->result; 345 346 return crypto_ahash_final(&rctx->fallback_req); 347 } 348 349 static int n2_hash_async_finup(struct ahash_request *req) 350 { 351 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 352 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 353 struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm); 354 355 ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm); 356 rctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; 357 rctx->fallback_req.nbytes = req->nbytes; 358 rctx->fallback_req.src = req->src; 359 rctx->fallback_req.result = req->result; 360 361 return crypto_ahash_finup(&rctx->fallback_req); 362 } 363 364 static int n2_hash_async_noimport(struct ahash_request *req, const void *in) 365 { 366 return -ENOSYS; 367 } 368 369 static int n2_hash_async_noexport(struct ahash_request *req, void *out) 370 { 371 return -ENOSYS; 372 } 373 374 static int n2_hash_cra_init(struct crypto_tfm *tfm) 375 { 376 const char *fallback_driver_name = crypto_tfm_alg_name(tfm); 377 struct crypto_ahash *ahash = __crypto_ahash_cast(tfm); 378 struct n2_hash_ctx *ctx = crypto_ahash_ctx(ahash); 379 struct crypto_ahash *fallback_tfm; 380 int err; 381 382 fallback_tfm = crypto_alloc_ahash(fallback_driver_name, 0, 383 CRYPTO_ALG_NEED_FALLBACK); 384 if (IS_ERR(fallback_tfm)) { 385 pr_warn("Fallback driver '%s' could not be loaded!\n", 386 fallback_driver_name); 387 err = PTR_ERR(fallback_tfm); 388 goto out; 389 } 390 391 crypto_ahash_set_reqsize(ahash, (sizeof(struct n2_hash_req_ctx) + 392 crypto_ahash_reqsize(fallback_tfm))); 393 394 ctx->fallback_tfm = fallback_tfm; 395 return 0; 396 397 out: 398 return err; 399 } 400 401 static void n2_hash_cra_exit(struct crypto_tfm *tfm) 402 { 403 struct crypto_ahash *ahash = __crypto_ahash_cast(tfm); 404 struct n2_hash_ctx *ctx = crypto_ahash_ctx(ahash); 405 406 crypto_free_ahash(ctx->fallback_tfm); 407 } 408 409 static int n2_hmac_cra_init(struct crypto_tfm *tfm) 410 { 411 const char *fallback_driver_name = crypto_tfm_alg_name(tfm); 412 struct crypto_ahash *ahash = __crypto_ahash_cast(tfm); 413 struct n2_hmac_ctx *ctx = crypto_ahash_ctx(ahash); 414 struct n2_hmac_alg *n2alg = n2_hmac_alg(tfm); 415 struct crypto_ahash *fallback_tfm; 416 struct crypto_shash *child_shash; 417 int err; 418 419 fallback_tfm = crypto_alloc_ahash(fallback_driver_name, 0, 420 CRYPTO_ALG_NEED_FALLBACK); 421 if (IS_ERR(fallback_tfm)) { 422 pr_warn("Fallback driver '%s' could not be loaded!\n", 423 fallback_driver_name); 424 err = PTR_ERR(fallback_tfm); 425 goto out; 426 } 427 428 child_shash = crypto_alloc_shash(n2alg->child_alg, 0, 0); 429 if (IS_ERR(child_shash)) { 430 pr_warn("Child shash '%s' could not be loaded!\n", 431 n2alg->child_alg); 432 err = PTR_ERR(child_shash); 433 goto out_free_fallback; 434 } 435 436 crypto_ahash_set_reqsize(ahash, (sizeof(struct n2_hash_req_ctx) + 437 crypto_ahash_reqsize(fallback_tfm))); 438 439 ctx->child_shash = child_shash; 440 ctx->base.fallback_tfm = fallback_tfm; 441 return 0; 442 443 out_free_fallback: 444 crypto_free_ahash(fallback_tfm); 445 446 out: 447 return err; 448 } 449 450 static void n2_hmac_cra_exit(struct crypto_tfm *tfm) 451 { 452 struct crypto_ahash *ahash = __crypto_ahash_cast(tfm); 453 struct n2_hmac_ctx *ctx = crypto_ahash_ctx(ahash); 454 455 crypto_free_ahash(ctx->base.fallback_tfm); 456 crypto_free_shash(ctx->child_shash); 457 } 458 459 static int n2_hmac_async_setkey(struct crypto_ahash *tfm, const u8 *key, 460 unsigned int keylen) 461 { 462 struct n2_hmac_ctx *ctx = crypto_ahash_ctx(tfm); 463 struct crypto_shash *child_shash = ctx->child_shash; 464 struct crypto_ahash *fallback_tfm; 465 int err, bs, ds; 466 467 fallback_tfm = ctx->base.fallback_tfm; 468 err = crypto_ahash_setkey(fallback_tfm, key, keylen); 469 if (err) 470 return err; 471 472 bs = crypto_shash_blocksize(child_shash); 473 ds = crypto_shash_digestsize(child_shash); 474 BUG_ON(ds > N2_HASH_KEY_MAX); 475 if (keylen > bs) { 476 err = crypto_shash_tfm_digest(child_shash, key, keylen, 477 ctx->hash_key); 478 if (err) 479 return err; 480 keylen = ds; 481 } else if (keylen <= N2_HASH_KEY_MAX) 482 memcpy(ctx->hash_key, key, keylen); 483 484 ctx->hash_key_len = keylen; 485 486 return err; 487 } 488 489 static unsigned long wait_for_tail(struct spu_queue *qp) 490 { 491 unsigned long head, hv_ret; 492 493 do { 494 hv_ret = sun4v_ncs_gethead(qp->qhandle, &head); 495 if (hv_ret != HV_EOK) { 496 pr_err("Hypervisor error on gethead\n"); 497 break; 498 } 499 if (head == qp->tail) { 500 qp->head = head; 501 break; 502 } 503 } while (1); 504 return hv_ret; 505 } 506 507 static unsigned long submit_and_wait_for_tail(struct spu_queue *qp, 508 struct cwq_initial_entry *ent) 509 { 510 unsigned long hv_ret = spu_queue_submit(qp, ent); 511 512 if (hv_ret == HV_EOK) 513 hv_ret = wait_for_tail(qp); 514 515 return hv_ret; 516 } 517 518 static int n2_do_async_digest(struct ahash_request *req, 519 unsigned int auth_type, unsigned int digest_size, 520 unsigned int result_size, void *hash_loc, 521 unsigned long auth_key, unsigned int auth_key_len) 522 { 523 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 524 struct cwq_initial_entry *ent; 525 struct crypto_hash_walk walk; 526 struct spu_queue *qp; 527 unsigned long flags; 528 int err = -ENODEV; 529 int nbytes, cpu; 530 531 /* The total effective length of the operation may not 532 * exceed 2^16. 533 */ 534 if (unlikely(req->nbytes > (1 << 16))) { 535 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 536 struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm); 537 538 ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm); 539 rctx->fallback_req.base.flags = 540 req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; 541 rctx->fallback_req.nbytes = req->nbytes; 542 rctx->fallback_req.src = req->src; 543 rctx->fallback_req.result = req->result; 544 545 return crypto_ahash_digest(&rctx->fallback_req); 546 } 547 548 nbytes = crypto_hash_walk_first(req, &walk); 549 550 cpu = get_cpu(); 551 qp = cpu_to_cwq[cpu]; 552 if (!qp) 553 goto out; 554 555 spin_lock_irqsave(&qp->lock, flags); 556 557 /* XXX can do better, improve this later by doing a by-hand scatterlist 558 * XXX walk, etc. 559 */ 560 ent = qp->q + qp->tail; 561 562 ent->control = control_word_base(nbytes, auth_key_len, 0, 563 auth_type, digest_size, 564 false, true, false, false, 565 OPCODE_INPLACE_BIT | 566 OPCODE_AUTH_MAC); 567 ent->src_addr = __pa(walk.data); 568 ent->auth_key_addr = auth_key; 569 ent->auth_iv_addr = __pa(hash_loc); 570 ent->final_auth_state_addr = 0UL; 571 ent->enc_key_addr = 0UL; 572 ent->enc_iv_addr = 0UL; 573 ent->dest_addr = __pa(hash_loc); 574 575 nbytes = crypto_hash_walk_done(&walk, 0); 576 while (nbytes > 0) { 577 ent = spu_queue_next(qp, ent); 578 579 ent->control = (nbytes - 1); 580 ent->src_addr = __pa(walk.data); 581 ent->auth_key_addr = 0UL; 582 ent->auth_iv_addr = 0UL; 583 ent->final_auth_state_addr = 0UL; 584 ent->enc_key_addr = 0UL; 585 ent->enc_iv_addr = 0UL; 586 ent->dest_addr = 0UL; 587 588 nbytes = crypto_hash_walk_done(&walk, 0); 589 } 590 ent->control |= CONTROL_END_OF_BLOCK; 591 592 if (submit_and_wait_for_tail(qp, ent) != HV_EOK) 593 err = -EINVAL; 594 else 595 err = 0; 596 597 spin_unlock_irqrestore(&qp->lock, flags); 598 599 if (!err) 600 memcpy(req->result, hash_loc, result_size); 601 out: 602 put_cpu(); 603 604 return err; 605 } 606 607 static int n2_hash_async_digest(struct ahash_request *req) 608 { 609 struct n2_ahash_alg *n2alg = n2_ahash_alg(req->base.tfm); 610 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 611 int ds; 612 613 ds = n2alg->digest_size; 614 if (unlikely(req->nbytes == 0)) { 615 memcpy(req->result, n2alg->hash_zero, ds); 616 return 0; 617 } 618 memcpy(&rctx->u, n2alg->hash_init, n2alg->hw_op_hashsz); 619 620 return n2_do_async_digest(req, n2alg->auth_type, 621 n2alg->hw_op_hashsz, ds, 622 &rctx->u, 0UL, 0); 623 } 624 625 static int n2_hmac_async_digest(struct ahash_request *req) 626 { 627 struct n2_hmac_alg *n2alg = n2_hmac_alg(req->base.tfm); 628 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 629 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 630 struct n2_hmac_ctx *ctx = crypto_ahash_ctx(tfm); 631 int ds; 632 633 ds = n2alg->derived.digest_size; 634 if (unlikely(req->nbytes == 0) || 635 unlikely(ctx->hash_key_len > N2_HASH_KEY_MAX)) { 636 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 637 struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm); 638 639 ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm); 640 rctx->fallback_req.base.flags = 641 req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; 642 rctx->fallback_req.nbytes = req->nbytes; 643 rctx->fallback_req.src = req->src; 644 rctx->fallback_req.result = req->result; 645 646 return crypto_ahash_digest(&rctx->fallback_req); 647 } 648 memcpy(&rctx->u, n2alg->derived.hash_init, 649 n2alg->derived.hw_op_hashsz); 650 651 return n2_do_async_digest(req, n2alg->derived.hmac_type, 652 n2alg->derived.hw_op_hashsz, ds, 653 &rctx->u, 654 __pa(&ctx->hash_key), 655 ctx->hash_key_len); 656 } 657 658 struct n2_skcipher_context { 659 int key_len; 660 int enc_type; 661 union { 662 u8 aes[AES_MAX_KEY_SIZE]; 663 u8 des[DES_KEY_SIZE]; 664 u8 des3[3 * DES_KEY_SIZE]; 665 u8 arc4[258]; /* S-box, X, Y */ 666 } key; 667 }; 668 669 #define N2_CHUNK_ARR_LEN 16 670 671 struct n2_crypto_chunk { 672 struct list_head entry; 673 unsigned long iv_paddr : 44; 674 unsigned long arr_len : 20; 675 unsigned long dest_paddr; 676 unsigned long dest_final; 677 struct { 678 unsigned long src_paddr : 44; 679 unsigned long src_len : 20; 680 } arr[N2_CHUNK_ARR_LEN]; 681 }; 682 683 struct n2_request_context { 684 struct skcipher_walk walk; 685 struct list_head chunk_list; 686 struct n2_crypto_chunk chunk; 687 u8 temp_iv[16]; 688 }; 689 690 /* The SPU allows some level of flexibility for partial cipher blocks 691 * being specified in a descriptor. 692 * 693 * It merely requires that every descriptor's length field is at least 694 * as large as the cipher block size. This means that a cipher block 695 * can span at most 2 descriptors. However, this does not allow a 696 * partial block to span into the final descriptor as that would 697 * violate the rule (since every descriptor's length must be at lest 698 * the block size). So, for example, assuming an 8 byte block size: 699 * 700 * 0xe --> 0xa --> 0x8 701 * 702 * is a valid length sequence, whereas: 703 * 704 * 0xe --> 0xb --> 0x7 705 * 706 * is not a valid sequence. 707 */ 708 709 struct n2_skcipher_alg { 710 struct list_head entry; 711 u8 enc_type; 712 struct skcipher_alg skcipher; 713 }; 714 715 static inline struct n2_skcipher_alg *n2_skcipher_alg(struct crypto_skcipher *tfm) 716 { 717 struct skcipher_alg *alg = crypto_skcipher_alg(tfm); 718 719 return container_of(alg, struct n2_skcipher_alg, skcipher); 720 } 721 722 struct n2_skcipher_request_context { 723 struct skcipher_walk walk; 724 }; 725 726 static int n2_aes_setkey(struct crypto_skcipher *skcipher, const u8 *key, 727 unsigned int keylen) 728 { 729 struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher); 730 struct n2_skcipher_context *ctx = crypto_tfm_ctx(tfm); 731 struct n2_skcipher_alg *n2alg = n2_skcipher_alg(skcipher); 732 733 ctx->enc_type = (n2alg->enc_type & ENC_TYPE_CHAINING_MASK); 734 735 switch (keylen) { 736 case AES_KEYSIZE_128: 737 ctx->enc_type |= ENC_TYPE_ALG_AES128; 738 break; 739 case AES_KEYSIZE_192: 740 ctx->enc_type |= ENC_TYPE_ALG_AES192; 741 break; 742 case AES_KEYSIZE_256: 743 ctx->enc_type |= ENC_TYPE_ALG_AES256; 744 break; 745 default: 746 return -EINVAL; 747 } 748 749 ctx->key_len = keylen; 750 memcpy(ctx->key.aes, key, keylen); 751 return 0; 752 } 753 754 static int n2_des_setkey(struct crypto_skcipher *skcipher, const u8 *key, 755 unsigned int keylen) 756 { 757 struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher); 758 struct n2_skcipher_context *ctx = crypto_tfm_ctx(tfm); 759 struct n2_skcipher_alg *n2alg = n2_skcipher_alg(skcipher); 760 int err; 761 762 err = verify_skcipher_des_key(skcipher, key); 763 if (err) 764 return err; 765 766 ctx->enc_type = n2alg->enc_type; 767 768 ctx->key_len = keylen; 769 memcpy(ctx->key.des, key, keylen); 770 return 0; 771 } 772 773 static int n2_3des_setkey(struct crypto_skcipher *skcipher, const u8 *key, 774 unsigned int keylen) 775 { 776 struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher); 777 struct n2_skcipher_context *ctx = crypto_tfm_ctx(tfm); 778 struct n2_skcipher_alg *n2alg = n2_skcipher_alg(skcipher); 779 int err; 780 781 err = verify_skcipher_des3_key(skcipher, key); 782 if (err) 783 return err; 784 785 ctx->enc_type = n2alg->enc_type; 786 787 ctx->key_len = keylen; 788 memcpy(ctx->key.des3, key, keylen); 789 return 0; 790 } 791 792 static int n2_arc4_setkey(struct crypto_skcipher *skcipher, const u8 *key, 793 unsigned int keylen) 794 { 795 struct crypto_tfm *tfm = crypto_skcipher_tfm(skcipher); 796 struct n2_skcipher_context *ctx = crypto_tfm_ctx(tfm); 797 struct n2_skcipher_alg *n2alg = n2_skcipher_alg(skcipher); 798 u8 *s = ctx->key.arc4; 799 u8 *x = s + 256; 800 u8 *y = x + 1; 801 int i, j, k; 802 803 ctx->enc_type = n2alg->enc_type; 804 805 j = k = 0; 806 *x = 0; 807 *y = 0; 808 for (i = 0; i < 256; i++) 809 s[i] = i; 810 for (i = 0; i < 256; i++) { 811 u8 a = s[i]; 812 j = (j + key[k] + a) & 0xff; 813 s[i] = s[j]; 814 s[j] = a; 815 if (++k >= keylen) 816 k = 0; 817 } 818 819 return 0; 820 } 821 822 static inline int skcipher_descriptor_len(int nbytes, unsigned int block_size) 823 { 824 int this_len = nbytes; 825 826 this_len -= (nbytes & (block_size - 1)); 827 return this_len > (1 << 16) ? (1 << 16) : this_len; 828 } 829 830 static int __n2_crypt_chunk(struct crypto_skcipher *skcipher, 831 struct n2_crypto_chunk *cp, 832 struct spu_queue *qp, bool encrypt) 833 { 834 struct n2_skcipher_context *ctx = crypto_skcipher_ctx(skcipher); 835 struct cwq_initial_entry *ent; 836 bool in_place; 837 int i; 838 839 ent = spu_queue_alloc(qp, cp->arr_len); 840 if (!ent) { 841 pr_info("queue_alloc() of %d fails\n", 842 cp->arr_len); 843 return -EBUSY; 844 } 845 846 in_place = (cp->dest_paddr == cp->arr[0].src_paddr); 847 848 ent->control = control_word_base(cp->arr[0].src_len, 849 0, ctx->enc_type, 0, 0, 850 false, true, false, encrypt, 851 OPCODE_ENCRYPT | 852 (in_place ? OPCODE_INPLACE_BIT : 0)); 853 ent->src_addr = cp->arr[0].src_paddr; 854 ent->auth_key_addr = 0UL; 855 ent->auth_iv_addr = 0UL; 856 ent->final_auth_state_addr = 0UL; 857 ent->enc_key_addr = __pa(&ctx->key); 858 ent->enc_iv_addr = cp->iv_paddr; 859 ent->dest_addr = (in_place ? 0UL : cp->dest_paddr); 860 861 for (i = 1; i < cp->arr_len; i++) { 862 ent = spu_queue_next(qp, ent); 863 864 ent->control = cp->arr[i].src_len - 1; 865 ent->src_addr = cp->arr[i].src_paddr; 866 ent->auth_key_addr = 0UL; 867 ent->auth_iv_addr = 0UL; 868 ent->final_auth_state_addr = 0UL; 869 ent->enc_key_addr = 0UL; 870 ent->enc_iv_addr = 0UL; 871 ent->dest_addr = 0UL; 872 } 873 ent->control |= CONTROL_END_OF_BLOCK; 874 875 return (spu_queue_submit(qp, ent) != HV_EOK) ? -EINVAL : 0; 876 } 877 878 static int n2_compute_chunks(struct skcipher_request *req) 879 { 880 struct n2_request_context *rctx = skcipher_request_ctx(req); 881 struct skcipher_walk *walk = &rctx->walk; 882 struct n2_crypto_chunk *chunk; 883 unsigned long dest_prev; 884 unsigned int tot_len; 885 bool prev_in_place; 886 int err, nbytes; 887 888 err = skcipher_walk_async(walk, req); 889 if (err) 890 return err; 891 892 INIT_LIST_HEAD(&rctx->chunk_list); 893 894 chunk = &rctx->chunk; 895 INIT_LIST_HEAD(&chunk->entry); 896 897 chunk->iv_paddr = 0UL; 898 chunk->arr_len = 0; 899 chunk->dest_paddr = 0UL; 900 901 prev_in_place = false; 902 dest_prev = ~0UL; 903 tot_len = 0; 904 905 while ((nbytes = walk->nbytes) != 0) { 906 unsigned long dest_paddr, src_paddr; 907 bool in_place; 908 int this_len; 909 910 src_paddr = (page_to_phys(walk->src.phys.page) + 911 walk->src.phys.offset); 912 dest_paddr = (page_to_phys(walk->dst.phys.page) + 913 walk->dst.phys.offset); 914 in_place = (src_paddr == dest_paddr); 915 this_len = skcipher_descriptor_len(nbytes, walk->blocksize); 916 917 if (chunk->arr_len != 0) { 918 if (in_place != prev_in_place || 919 (!prev_in_place && 920 dest_paddr != dest_prev) || 921 chunk->arr_len == N2_CHUNK_ARR_LEN || 922 tot_len + this_len > (1 << 16)) { 923 chunk->dest_final = dest_prev; 924 list_add_tail(&chunk->entry, 925 &rctx->chunk_list); 926 chunk = kzalloc(sizeof(*chunk), GFP_ATOMIC); 927 if (!chunk) { 928 err = -ENOMEM; 929 break; 930 } 931 INIT_LIST_HEAD(&chunk->entry); 932 } 933 } 934 if (chunk->arr_len == 0) { 935 chunk->dest_paddr = dest_paddr; 936 tot_len = 0; 937 } 938 chunk->arr[chunk->arr_len].src_paddr = src_paddr; 939 chunk->arr[chunk->arr_len].src_len = this_len; 940 chunk->arr_len++; 941 942 dest_prev = dest_paddr + this_len; 943 prev_in_place = in_place; 944 tot_len += this_len; 945 946 err = skcipher_walk_done(walk, nbytes - this_len); 947 if (err) 948 break; 949 } 950 if (!err && chunk->arr_len != 0) { 951 chunk->dest_final = dest_prev; 952 list_add_tail(&chunk->entry, &rctx->chunk_list); 953 } 954 955 return err; 956 } 957 958 static void n2_chunk_complete(struct skcipher_request *req, void *final_iv) 959 { 960 struct n2_request_context *rctx = skcipher_request_ctx(req); 961 struct n2_crypto_chunk *c, *tmp; 962 963 if (final_iv) 964 memcpy(rctx->walk.iv, final_iv, rctx->walk.blocksize); 965 966 list_for_each_entry_safe(c, tmp, &rctx->chunk_list, entry) { 967 list_del(&c->entry); 968 if (unlikely(c != &rctx->chunk)) 969 kfree(c); 970 } 971 972 } 973 974 static int n2_do_ecb(struct skcipher_request *req, bool encrypt) 975 { 976 struct n2_request_context *rctx = skcipher_request_ctx(req); 977 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 978 int err = n2_compute_chunks(req); 979 struct n2_crypto_chunk *c, *tmp; 980 unsigned long flags, hv_ret; 981 struct spu_queue *qp; 982 983 if (err) 984 return err; 985 986 qp = cpu_to_cwq[get_cpu()]; 987 err = -ENODEV; 988 if (!qp) 989 goto out; 990 991 spin_lock_irqsave(&qp->lock, flags); 992 993 list_for_each_entry_safe(c, tmp, &rctx->chunk_list, entry) { 994 err = __n2_crypt_chunk(tfm, c, qp, encrypt); 995 if (err) 996 break; 997 list_del(&c->entry); 998 if (unlikely(c != &rctx->chunk)) 999 kfree(c); 1000 } 1001 if (!err) { 1002 hv_ret = wait_for_tail(qp); 1003 if (hv_ret != HV_EOK) 1004 err = -EINVAL; 1005 } 1006 1007 spin_unlock_irqrestore(&qp->lock, flags); 1008 1009 out: 1010 put_cpu(); 1011 1012 n2_chunk_complete(req, NULL); 1013 return err; 1014 } 1015 1016 static int n2_encrypt_ecb(struct skcipher_request *req) 1017 { 1018 return n2_do_ecb(req, true); 1019 } 1020 1021 static int n2_decrypt_ecb(struct skcipher_request *req) 1022 { 1023 return n2_do_ecb(req, false); 1024 } 1025 1026 static int n2_do_chaining(struct skcipher_request *req, bool encrypt) 1027 { 1028 struct n2_request_context *rctx = skcipher_request_ctx(req); 1029 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 1030 unsigned long flags, hv_ret, iv_paddr; 1031 int err = n2_compute_chunks(req); 1032 struct n2_crypto_chunk *c, *tmp; 1033 struct spu_queue *qp; 1034 void *final_iv_addr; 1035 1036 final_iv_addr = NULL; 1037 1038 if (err) 1039 return err; 1040 1041 qp = cpu_to_cwq[get_cpu()]; 1042 err = -ENODEV; 1043 if (!qp) 1044 goto out; 1045 1046 spin_lock_irqsave(&qp->lock, flags); 1047 1048 if (encrypt) { 1049 iv_paddr = __pa(rctx->walk.iv); 1050 list_for_each_entry_safe(c, tmp, &rctx->chunk_list, 1051 entry) { 1052 c->iv_paddr = iv_paddr; 1053 err = __n2_crypt_chunk(tfm, c, qp, true); 1054 if (err) 1055 break; 1056 iv_paddr = c->dest_final - rctx->walk.blocksize; 1057 list_del(&c->entry); 1058 if (unlikely(c != &rctx->chunk)) 1059 kfree(c); 1060 } 1061 final_iv_addr = __va(iv_paddr); 1062 } else { 1063 list_for_each_entry_safe_reverse(c, tmp, &rctx->chunk_list, 1064 entry) { 1065 if (c == &rctx->chunk) { 1066 iv_paddr = __pa(rctx->walk.iv); 1067 } else { 1068 iv_paddr = (tmp->arr[tmp->arr_len-1].src_paddr + 1069 tmp->arr[tmp->arr_len-1].src_len - 1070 rctx->walk.blocksize); 1071 } 1072 if (!final_iv_addr) { 1073 unsigned long pa; 1074 1075 pa = (c->arr[c->arr_len-1].src_paddr + 1076 c->arr[c->arr_len-1].src_len - 1077 rctx->walk.blocksize); 1078 final_iv_addr = rctx->temp_iv; 1079 memcpy(rctx->temp_iv, __va(pa), 1080 rctx->walk.blocksize); 1081 } 1082 c->iv_paddr = iv_paddr; 1083 err = __n2_crypt_chunk(tfm, c, qp, false); 1084 if (err) 1085 break; 1086 list_del(&c->entry); 1087 if (unlikely(c != &rctx->chunk)) 1088 kfree(c); 1089 } 1090 } 1091 if (!err) { 1092 hv_ret = wait_for_tail(qp); 1093 if (hv_ret != HV_EOK) 1094 err = -EINVAL; 1095 } 1096 1097 spin_unlock_irqrestore(&qp->lock, flags); 1098 1099 out: 1100 put_cpu(); 1101 1102 n2_chunk_complete(req, err ? NULL : final_iv_addr); 1103 return err; 1104 } 1105 1106 static int n2_encrypt_chaining(struct skcipher_request *req) 1107 { 1108 return n2_do_chaining(req, true); 1109 } 1110 1111 static int n2_decrypt_chaining(struct skcipher_request *req) 1112 { 1113 return n2_do_chaining(req, false); 1114 } 1115 1116 struct n2_skcipher_tmpl { 1117 const char *name; 1118 const char *drv_name; 1119 u8 block_size; 1120 u8 enc_type; 1121 struct skcipher_alg skcipher; 1122 }; 1123 1124 static const struct n2_skcipher_tmpl skcipher_tmpls[] = { 1125 /* ARC4: only ECB is supported (chaining bits ignored) */ 1126 { .name = "ecb(arc4)", 1127 .drv_name = "ecb-arc4", 1128 .block_size = 1, 1129 .enc_type = (ENC_TYPE_ALG_RC4_STREAM | 1130 ENC_TYPE_CHAINING_ECB), 1131 .skcipher = { 1132 .min_keysize = 1, 1133 .max_keysize = 256, 1134 .setkey = n2_arc4_setkey, 1135 .encrypt = n2_encrypt_ecb, 1136 .decrypt = n2_decrypt_ecb, 1137 }, 1138 }, 1139 1140 /* DES: ECB CBC and CFB are supported */ 1141 { .name = "ecb(des)", 1142 .drv_name = "ecb-des", 1143 .block_size = DES_BLOCK_SIZE, 1144 .enc_type = (ENC_TYPE_ALG_DES | 1145 ENC_TYPE_CHAINING_ECB), 1146 .skcipher = { 1147 .min_keysize = DES_KEY_SIZE, 1148 .max_keysize = DES_KEY_SIZE, 1149 .setkey = n2_des_setkey, 1150 .encrypt = n2_encrypt_ecb, 1151 .decrypt = n2_decrypt_ecb, 1152 }, 1153 }, 1154 { .name = "cbc(des)", 1155 .drv_name = "cbc-des", 1156 .block_size = DES_BLOCK_SIZE, 1157 .enc_type = (ENC_TYPE_ALG_DES | 1158 ENC_TYPE_CHAINING_CBC), 1159 .skcipher = { 1160 .ivsize = DES_BLOCK_SIZE, 1161 .min_keysize = DES_KEY_SIZE, 1162 .max_keysize = DES_KEY_SIZE, 1163 .setkey = n2_des_setkey, 1164 .encrypt = n2_encrypt_chaining, 1165 .decrypt = n2_decrypt_chaining, 1166 }, 1167 }, 1168 { .name = "cfb(des)", 1169 .drv_name = "cfb-des", 1170 .block_size = DES_BLOCK_SIZE, 1171 .enc_type = (ENC_TYPE_ALG_DES | 1172 ENC_TYPE_CHAINING_CFB), 1173 .skcipher = { 1174 .min_keysize = DES_KEY_SIZE, 1175 .max_keysize = DES_KEY_SIZE, 1176 .setkey = n2_des_setkey, 1177 .encrypt = n2_encrypt_chaining, 1178 .decrypt = n2_decrypt_chaining, 1179 }, 1180 }, 1181 1182 /* 3DES: ECB CBC and CFB are supported */ 1183 { .name = "ecb(des3_ede)", 1184 .drv_name = "ecb-3des", 1185 .block_size = DES_BLOCK_SIZE, 1186 .enc_type = (ENC_TYPE_ALG_3DES | 1187 ENC_TYPE_CHAINING_ECB), 1188 .skcipher = { 1189 .min_keysize = 3 * DES_KEY_SIZE, 1190 .max_keysize = 3 * DES_KEY_SIZE, 1191 .setkey = n2_3des_setkey, 1192 .encrypt = n2_encrypt_ecb, 1193 .decrypt = n2_decrypt_ecb, 1194 }, 1195 }, 1196 { .name = "cbc(des3_ede)", 1197 .drv_name = "cbc-3des", 1198 .block_size = DES_BLOCK_SIZE, 1199 .enc_type = (ENC_TYPE_ALG_3DES | 1200 ENC_TYPE_CHAINING_CBC), 1201 .skcipher = { 1202 .ivsize = DES_BLOCK_SIZE, 1203 .min_keysize = 3 * DES_KEY_SIZE, 1204 .max_keysize = 3 * DES_KEY_SIZE, 1205 .setkey = n2_3des_setkey, 1206 .encrypt = n2_encrypt_chaining, 1207 .decrypt = n2_decrypt_chaining, 1208 }, 1209 }, 1210 { .name = "cfb(des3_ede)", 1211 .drv_name = "cfb-3des", 1212 .block_size = DES_BLOCK_SIZE, 1213 .enc_type = (ENC_TYPE_ALG_3DES | 1214 ENC_TYPE_CHAINING_CFB), 1215 .skcipher = { 1216 .min_keysize = 3 * DES_KEY_SIZE, 1217 .max_keysize = 3 * DES_KEY_SIZE, 1218 .setkey = n2_3des_setkey, 1219 .encrypt = n2_encrypt_chaining, 1220 .decrypt = n2_decrypt_chaining, 1221 }, 1222 }, 1223 /* AES: ECB CBC and CTR are supported */ 1224 { .name = "ecb(aes)", 1225 .drv_name = "ecb-aes", 1226 .block_size = AES_BLOCK_SIZE, 1227 .enc_type = (ENC_TYPE_ALG_AES128 | 1228 ENC_TYPE_CHAINING_ECB), 1229 .skcipher = { 1230 .min_keysize = AES_MIN_KEY_SIZE, 1231 .max_keysize = AES_MAX_KEY_SIZE, 1232 .setkey = n2_aes_setkey, 1233 .encrypt = n2_encrypt_ecb, 1234 .decrypt = n2_decrypt_ecb, 1235 }, 1236 }, 1237 { .name = "cbc(aes)", 1238 .drv_name = "cbc-aes", 1239 .block_size = AES_BLOCK_SIZE, 1240 .enc_type = (ENC_TYPE_ALG_AES128 | 1241 ENC_TYPE_CHAINING_CBC), 1242 .skcipher = { 1243 .ivsize = AES_BLOCK_SIZE, 1244 .min_keysize = AES_MIN_KEY_SIZE, 1245 .max_keysize = AES_MAX_KEY_SIZE, 1246 .setkey = n2_aes_setkey, 1247 .encrypt = n2_encrypt_chaining, 1248 .decrypt = n2_decrypt_chaining, 1249 }, 1250 }, 1251 { .name = "ctr(aes)", 1252 .drv_name = "ctr-aes", 1253 .block_size = AES_BLOCK_SIZE, 1254 .enc_type = (ENC_TYPE_ALG_AES128 | 1255 ENC_TYPE_CHAINING_COUNTER), 1256 .skcipher = { 1257 .ivsize = AES_BLOCK_SIZE, 1258 .min_keysize = AES_MIN_KEY_SIZE, 1259 .max_keysize = AES_MAX_KEY_SIZE, 1260 .setkey = n2_aes_setkey, 1261 .encrypt = n2_encrypt_chaining, 1262 .decrypt = n2_encrypt_chaining, 1263 }, 1264 }, 1265 1266 }; 1267 #define NUM_CIPHER_TMPLS ARRAY_SIZE(skcipher_tmpls) 1268 1269 static LIST_HEAD(skcipher_algs); 1270 1271 struct n2_hash_tmpl { 1272 const char *name; 1273 const u8 *hash_zero; 1274 const u32 *hash_init; 1275 u8 hw_op_hashsz; 1276 u8 digest_size; 1277 u8 block_size; 1278 u8 auth_type; 1279 u8 hmac_type; 1280 }; 1281 1282 static const u32 n2_md5_init[MD5_HASH_WORDS] = { 1283 cpu_to_le32(MD5_H0), 1284 cpu_to_le32(MD5_H1), 1285 cpu_to_le32(MD5_H2), 1286 cpu_to_le32(MD5_H3), 1287 }; 1288 static const u32 n2_sha1_init[SHA1_DIGEST_SIZE / 4] = { 1289 SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4, 1290 }; 1291 static const u32 n2_sha256_init[SHA256_DIGEST_SIZE / 4] = { 1292 SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3, 1293 SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7, 1294 }; 1295 static const u32 n2_sha224_init[SHA256_DIGEST_SIZE / 4] = { 1296 SHA224_H0, SHA224_H1, SHA224_H2, SHA224_H3, 1297 SHA224_H4, SHA224_H5, SHA224_H6, SHA224_H7, 1298 }; 1299 1300 static const struct n2_hash_tmpl hash_tmpls[] = { 1301 { .name = "md5", 1302 .hash_zero = md5_zero_message_hash, 1303 .hash_init = n2_md5_init, 1304 .auth_type = AUTH_TYPE_MD5, 1305 .hmac_type = AUTH_TYPE_HMAC_MD5, 1306 .hw_op_hashsz = MD5_DIGEST_SIZE, 1307 .digest_size = MD5_DIGEST_SIZE, 1308 .block_size = MD5_HMAC_BLOCK_SIZE }, 1309 { .name = "sha1", 1310 .hash_zero = sha1_zero_message_hash, 1311 .hash_init = n2_sha1_init, 1312 .auth_type = AUTH_TYPE_SHA1, 1313 .hmac_type = AUTH_TYPE_HMAC_SHA1, 1314 .hw_op_hashsz = SHA1_DIGEST_SIZE, 1315 .digest_size = SHA1_DIGEST_SIZE, 1316 .block_size = SHA1_BLOCK_SIZE }, 1317 { .name = "sha256", 1318 .hash_zero = sha256_zero_message_hash, 1319 .hash_init = n2_sha256_init, 1320 .auth_type = AUTH_TYPE_SHA256, 1321 .hmac_type = AUTH_TYPE_HMAC_SHA256, 1322 .hw_op_hashsz = SHA256_DIGEST_SIZE, 1323 .digest_size = SHA256_DIGEST_SIZE, 1324 .block_size = SHA256_BLOCK_SIZE }, 1325 { .name = "sha224", 1326 .hash_zero = sha224_zero_message_hash, 1327 .hash_init = n2_sha224_init, 1328 .auth_type = AUTH_TYPE_SHA256, 1329 .hmac_type = AUTH_TYPE_RESERVED, 1330 .hw_op_hashsz = SHA256_DIGEST_SIZE, 1331 .digest_size = SHA224_DIGEST_SIZE, 1332 .block_size = SHA224_BLOCK_SIZE }, 1333 }; 1334 #define NUM_HASH_TMPLS ARRAY_SIZE(hash_tmpls) 1335 1336 static LIST_HEAD(ahash_algs); 1337 static LIST_HEAD(hmac_algs); 1338 1339 static int algs_registered; 1340 1341 static void __n2_unregister_algs(void) 1342 { 1343 struct n2_skcipher_alg *skcipher, *skcipher_tmp; 1344 struct n2_ahash_alg *alg, *alg_tmp; 1345 struct n2_hmac_alg *hmac, *hmac_tmp; 1346 1347 list_for_each_entry_safe(skcipher, skcipher_tmp, &skcipher_algs, entry) { 1348 crypto_unregister_skcipher(&skcipher->skcipher); 1349 list_del(&skcipher->entry); 1350 kfree(skcipher); 1351 } 1352 list_for_each_entry_safe(hmac, hmac_tmp, &hmac_algs, derived.entry) { 1353 crypto_unregister_ahash(&hmac->derived.alg); 1354 list_del(&hmac->derived.entry); 1355 kfree(hmac); 1356 } 1357 list_for_each_entry_safe(alg, alg_tmp, &ahash_algs, entry) { 1358 crypto_unregister_ahash(&alg->alg); 1359 list_del(&alg->entry); 1360 kfree(alg); 1361 } 1362 } 1363 1364 static int n2_skcipher_init_tfm(struct crypto_skcipher *tfm) 1365 { 1366 crypto_skcipher_set_reqsize(tfm, sizeof(struct n2_request_context)); 1367 return 0; 1368 } 1369 1370 static int __n2_register_one_skcipher(const struct n2_skcipher_tmpl *tmpl) 1371 { 1372 struct n2_skcipher_alg *p = kzalloc(sizeof(*p), GFP_KERNEL); 1373 struct skcipher_alg *alg; 1374 int err; 1375 1376 if (!p) 1377 return -ENOMEM; 1378 1379 alg = &p->skcipher; 1380 *alg = tmpl->skcipher; 1381 1382 snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", tmpl->name); 1383 snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s-n2", tmpl->drv_name); 1384 alg->base.cra_priority = N2_CRA_PRIORITY; 1385 alg->base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC; 1386 alg->base.cra_blocksize = tmpl->block_size; 1387 p->enc_type = tmpl->enc_type; 1388 alg->base.cra_ctxsize = sizeof(struct n2_skcipher_context); 1389 alg->base.cra_module = THIS_MODULE; 1390 alg->init = n2_skcipher_init_tfm; 1391 1392 list_add(&p->entry, &skcipher_algs); 1393 err = crypto_register_skcipher(alg); 1394 if (err) { 1395 pr_err("%s alg registration failed\n", alg->base.cra_name); 1396 list_del(&p->entry); 1397 kfree(p); 1398 } else { 1399 pr_info("%s alg registered\n", alg->base.cra_name); 1400 } 1401 return err; 1402 } 1403 1404 static int __n2_register_one_hmac(struct n2_ahash_alg *n2ahash) 1405 { 1406 struct n2_hmac_alg *p = kzalloc(sizeof(*p), GFP_KERNEL); 1407 struct ahash_alg *ahash; 1408 struct crypto_alg *base; 1409 int err; 1410 1411 if (!p) 1412 return -ENOMEM; 1413 1414 p->child_alg = n2ahash->alg.halg.base.cra_name; 1415 memcpy(&p->derived, n2ahash, sizeof(struct n2_ahash_alg)); 1416 INIT_LIST_HEAD(&p->derived.entry); 1417 1418 ahash = &p->derived.alg; 1419 ahash->digest = n2_hmac_async_digest; 1420 ahash->setkey = n2_hmac_async_setkey; 1421 1422 base = &ahash->halg.base; 1423 snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", p->child_alg); 1424 snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "hmac-%s-n2", p->child_alg); 1425 1426 base->cra_ctxsize = sizeof(struct n2_hmac_ctx); 1427 base->cra_init = n2_hmac_cra_init; 1428 base->cra_exit = n2_hmac_cra_exit; 1429 1430 list_add(&p->derived.entry, &hmac_algs); 1431 err = crypto_register_ahash(ahash); 1432 if (err) { 1433 pr_err("%s alg registration failed\n", base->cra_name); 1434 list_del(&p->derived.entry); 1435 kfree(p); 1436 } else { 1437 pr_info("%s alg registered\n", base->cra_name); 1438 } 1439 return err; 1440 } 1441 1442 static int __n2_register_one_ahash(const struct n2_hash_tmpl *tmpl) 1443 { 1444 struct n2_ahash_alg *p = kzalloc(sizeof(*p), GFP_KERNEL); 1445 struct hash_alg_common *halg; 1446 struct crypto_alg *base; 1447 struct ahash_alg *ahash; 1448 int err; 1449 1450 if (!p) 1451 return -ENOMEM; 1452 1453 p->hash_zero = tmpl->hash_zero; 1454 p->hash_init = tmpl->hash_init; 1455 p->auth_type = tmpl->auth_type; 1456 p->hmac_type = tmpl->hmac_type; 1457 p->hw_op_hashsz = tmpl->hw_op_hashsz; 1458 p->digest_size = tmpl->digest_size; 1459 1460 ahash = &p->alg; 1461 ahash->init = n2_hash_async_init; 1462 ahash->update = n2_hash_async_update; 1463 ahash->final = n2_hash_async_final; 1464 ahash->finup = n2_hash_async_finup; 1465 ahash->digest = n2_hash_async_digest; 1466 ahash->export = n2_hash_async_noexport; 1467 ahash->import = n2_hash_async_noimport; 1468 1469 halg = &ahash->halg; 1470 halg->digestsize = tmpl->digest_size; 1471 1472 base = &halg->base; 1473 snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "%s", tmpl->name); 1474 snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s-n2", tmpl->name); 1475 base->cra_priority = N2_CRA_PRIORITY; 1476 base->cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1477 CRYPTO_ALG_NEED_FALLBACK; 1478 base->cra_blocksize = tmpl->block_size; 1479 base->cra_ctxsize = sizeof(struct n2_hash_ctx); 1480 base->cra_module = THIS_MODULE; 1481 base->cra_init = n2_hash_cra_init; 1482 base->cra_exit = n2_hash_cra_exit; 1483 1484 list_add(&p->entry, &ahash_algs); 1485 err = crypto_register_ahash(ahash); 1486 if (err) { 1487 pr_err("%s alg registration failed\n", base->cra_name); 1488 list_del(&p->entry); 1489 kfree(p); 1490 } else { 1491 pr_info("%s alg registered\n", base->cra_name); 1492 } 1493 if (!err && p->hmac_type != AUTH_TYPE_RESERVED) 1494 err = __n2_register_one_hmac(p); 1495 return err; 1496 } 1497 1498 static int n2_register_algs(void) 1499 { 1500 int i, err = 0; 1501 1502 mutex_lock(&spu_lock); 1503 if (algs_registered++) 1504 goto out; 1505 1506 for (i = 0; i < NUM_HASH_TMPLS; i++) { 1507 err = __n2_register_one_ahash(&hash_tmpls[i]); 1508 if (err) { 1509 __n2_unregister_algs(); 1510 goto out; 1511 } 1512 } 1513 for (i = 0; i < NUM_CIPHER_TMPLS; i++) { 1514 err = __n2_register_one_skcipher(&skcipher_tmpls[i]); 1515 if (err) { 1516 __n2_unregister_algs(); 1517 goto out; 1518 } 1519 } 1520 1521 out: 1522 mutex_unlock(&spu_lock); 1523 return err; 1524 } 1525 1526 static void n2_unregister_algs(void) 1527 { 1528 mutex_lock(&spu_lock); 1529 if (!--algs_registered) 1530 __n2_unregister_algs(); 1531 mutex_unlock(&spu_lock); 1532 } 1533 1534 /* To map CWQ queues to interrupt sources, the hypervisor API provides 1535 * a devino. This isn't very useful to us because all of the 1536 * interrupts listed in the device_node have been translated to 1537 * Linux virtual IRQ cookie numbers. 1538 * 1539 * So we have to back-translate, going through the 'intr' and 'ino' 1540 * property tables of the n2cp MDESC node, matching it with the OF 1541 * 'interrupts' property entries, in order to to figure out which 1542 * devino goes to which already-translated IRQ. 1543 */ 1544 static int find_devino_index(struct platform_device *dev, struct spu_mdesc_info *ip, 1545 unsigned long dev_ino) 1546 { 1547 const unsigned int *dev_intrs; 1548 unsigned int intr; 1549 int i; 1550 1551 for (i = 0; i < ip->num_intrs; i++) { 1552 if (ip->ino_table[i].ino == dev_ino) 1553 break; 1554 } 1555 if (i == ip->num_intrs) 1556 return -ENODEV; 1557 1558 intr = ip->ino_table[i].intr; 1559 1560 dev_intrs = of_get_property(dev->dev.of_node, "interrupts", NULL); 1561 if (!dev_intrs) 1562 return -ENODEV; 1563 1564 for (i = 0; i < dev->archdata.num_irqs; i++) { 1565 if (dev_intrs[i] == intr) 1566 return i; 1567 } 1568 1569 return -ENODEV; 1570 } 1571 1572 static int spu_map_ino(struct platform_device *dev, struct spu_mdesc_info *ip, 1573 const char *irq_name, struct spu_queue *p, 1574 irq_handler_t handler) 1575 { 1576 unsigned long herr; 1577 int index; 1578 1579 herr = sun4v_ncs_qhandle_to_devino(p->qhandle, &p->devino); 1580 if (herr) 1581 return -EINVAL; 1582 1583 index = find_devino_index(dev, ip, p->devino); 1584 if (index < 0) 1585 return index; 1586 1587 p->irq = dev->archdata.irqs[index]; 1588 1589 sprintf(p->irq_name, "%s-%d", irq_name, index); 1590 1591 return request_irq(p->irq, handler, 0, p->irq_name, p); 1592 } 1593 1594 static struct kmem_cache *queue_cache[2]; 1595 1596 static void *new_queue(unsigned long q_type) 1597 { 1598 return kmem_cache_zalloc(queue_cache[q_type - 1], GFP_KERNEL); 1599 } 1600 1601 static void free_queue(void *p, unsigned long q_type) 1602 { 1603 kmem_cache_free(queue_cache[q_type - 1], p); 1604 } 1605 1606 static int queue_cache_init(void) 1607 { 1608 if (!queue_cache[HV_NCS_QTYPE_MAU - 1]) 1609 queue_cache[HV_NCS_QTYPE_MAU - 1] = 1610 kmem_cache_create("mau_queue", 1611 (MAU_NUM_ENTRIES * 1612 MAU_ENTRY_SIZE), 1613 MAU_ENTRY_SIZE, 0, NULL); 1614 if (!queue_cache[HV_NCS_QTYPE_MAU - 1]) 1615 return -ENOMEM; 1616 1617 if (!queue_cache[HV_NCS_QTYPE_CWQ - 1]) 1618 queue_cache[HV_NCS_QTYPE_CWQ - 1] = 1619 kmem_cache_create("cwq_queue", 1620 (CWQ_NUM_ENTRIES * 1621 CWQ_ENTRY_SIZE), 1622 CWQ_ENTRY_SIZE, 0, NULL); 1623 if (!queue_cache[HV_NCS_QTYPE_CWQ - 1]) { 1624 kmem_cache_destroy(queue_cache[HV_NCS_QTYPE_MAU - 1]); 1625 queue_cache[HV_NCS_QTYPE_MAU - 1] = NULL; 1626 return -ENOMEM; 1627 } 1628 return 0; 1629 } 1630 1631 static void queue_cache_destroy(void) 1632 { 1633 kmem_cache_destroy(queue_cache[HV_NCS_QTYPE_MAU - 1]); 1634 kmem_cache_destroy(queue_cache[HV_NCS_QTYPE_CWQ - 1]); 1635 queue_cache[HV_NCS_QTYPE_MAU - 1] = NULL; 1636 queue_cache[HV_NCS_QTYPE_CWQ - 1] = NULL; 1637 } 1638 1639 static long spu_queue_register_workfn(void *arg) 1640 { 1641 struct spu_qreg *qr = arg; 1642 struct spu_queue *p = qr->queue; 1643 unsigned long q_type = qr->type; 1644 unsigned long hv_ret; 1645 1646 hv_ret = sun4v_ncs_qconf(q_type, __pa(p->q), 1647 CWQ_NUM_ENTRIES, &p->qhandle); 1648 if (!hv_ret) 1649 sun4v_ncs_sethead_marker(p->qhandle, 0); 1650 1651 return hv_ret ? -EINVAL : 0; 1652 } 1653 1654 static int spu_queue_register(struct spu_queue *p, unsigned long q_type) 1655 { 1656 int cpu = cpumask_any_and(&p->sharing, cpu_online_mask); 1657 struct spu_qreg qr = { .queue = p, .type = q_type }; 1658 1659 return work_on_cpu_safe(cpu, spu_queue_register_workfn, &qr); 1660 } 1661 1662 static int spu_queue_setup(struct spu_queue *p) 1663 { 1664 int err; 1665 1666 p->q = new_queue(p->q_type); 1667 if (!p->q) 1668 return -ENOMEM; 1669 1670 err = spu_queue_register(p, p->q_type); 1671 if (err) { 1672 free_queue(p->q, p->q_type); 1673 p->q = NULL; 1674 } 1675 1676 return err; 1677 } 1678 1679 static void spu_queue_destroy(struct spu_queue *p) 1680 { 1681 unsigned long hv_ret; 1682 1683 if (!p->q) 1684 return; 1685 1686 hv_ret = sun4v_ncs_qconf(p->q_type, p->qhandle, 0, &p->qhandle); 1687 1688 if (!hv_ret) 1689 free_queue(p->q, p->q_type); 1690 } 1691 1692 static void spu_list_destroy(struct list_head *list) 1693 { 1694 struct spu_queue *p, *n; 1695 1696 list_for_each_entry_safe(p, n, list, list) { 1697 int i; 1698 1699 for (i = 0; i < NR_CPUS; i++) { 1700 if (cpu_to_cwq[i] == p) 1701 cpu_to_cwq[i] = NULL; 1702 } 1703 1704 if (p->irq) { 1705 free_irq(p->irq, p); 1706 p->irq = 0; 1707 } 1708 spu_queue_destroy(p); 1709 list_del(&p->list); 1710 kfree(p); 1711 } 1712 } 1713 1714 /* Walk the backward arcs of a CWQ 'exec-unit' node, 1715 * gathering cpu membership information. 1716 */ 1717 static int spu_mdesc_walk_arcs(struct mdesc_handle *mdesc, 1718 struct platform_device *dev, 1719 u64 node, struct spu_queue *p, 1720 struct spu_queue **table) 1721 { 1722 u64 arc; 1723 1724 mdesc_for_each_arc(arc, mdesc, node, MDESC_ARC_TYPE_BACK) { 1725 u64 tgt = mdesc_arc_target(mdesc, arc); 1726 const char *name = mdesc_node_name(mdesc, tgt); 1727 const u64 *id; 1728 1729 if (strcmp(name, "cpu")) 1730 continue; 1731 id = mdesc_get_property(mdesc, tgt, "id", NULL); 1732 if (table[*id] != NULL) { 1733 dev_err(&dev->dev, "%pOF: SPU cpu slot already set.\n", 1734 dev->dev.of_node); 1735 return -EINVAL; 1736 } 1737 cpumask_set_cpu(*id, &p->sharing); 1738 table[*id] = p; 1739 } 1740 return 0; 1741 } 1742 1743 /* Process an 'exec-unit' MDESC node of type 'cwq'. */ 1744 static int handle_exec_unit(struct spu_mdesc_info *ip, struct list_head *list, 1745 struct platform_device *dev, struct mdesc_handle *mdesc, 1746 u64 node, const char *iname, unsigned long q_type, 1747 irq_handler_t handler, struct spu_queue **table) 1748 { 1749 struct spu_queue *p; 1750 int err; 1751 1752 p = kzalloc(sizeof(struct spu_queue), GFP_KERNEL); 1753 if (!p) { 1754 dev_err(&dev->dev, "%pOF: Could not allocate SPU queue.\n", 1755 dev->dev.of_node); 1756 return -ENOMEM; 1757 } 1758 1759 cpumask_clear(&p->sharing); 1760 spin_lock_init(&p->lock); 1761 p->q_type = q_type; 1762 INIT_LIST_HEAD(&p->jobs); 1763 list_add(&p->list, list); 1764 1765 err = spu_mdesc_walk_arcs(mdesc, dev, node, p, table); 1766 if (err) 1767 return err; 1768 1769 err = spu_queue_setup(p); 1770 if (err) 1771 return err; 1772 1773 return spu_map_ino(dev, ip, iname, p, handler); 1774 } 1775 1776 static int spu_mdesc_scan(struct mdesc_handle *mdesc, struct platform_device *dev, 1777 struct spu_mdesc_info *ip, struct list_head *list, 1778 const char *exec_name, unsigned long q_type, 1779 irq_handler_t handler, struct spu_queue **table) 1780 { 1781 int err = 0; 1782 u64 node; 1783 1784 mdesc_for_each_node_by_name(mdesc, node, "exec-unit") { 1785 const char *type; 1786 1787 type = mdesc_get_property(mdesc, node, "type", NULL); 1788 if (!type || strcmp(type, exec_name)) 1789 continue; 1790 1791 err = handle_exec_unit(ip, list, dev, mdesc, node, 1792 exec_name, q_type, handler, table); 1793 if (err) { 1794 spu_list_destroy(list); 1795 break; 1796 } 1797 } 1798 1799 return err; 1800 } 1801 1802 static int get_irq_props(struct mdesc_handle *mdesc, u64 node, 1803 struct spu_mdesc_info *ip) 1804 { 1805 const u64 *ino; 1806 int ino_len; 1807 int i; 1808 1809 ino = mdesc_get_property(mdesc, node, "ino", &ino_len); 1810 if (!ino) { 1811 printk("NO 'ino'\n"); 1812 return -ENODEV; 1813 } 1814 1815 ip->num_intrs = ino_len / sizeof(u64); 1816 ip->ino_table = kzalloc((sizeof(struct ino_blob) * 1817 ip->num_intrs), 1818 GFP_KERNEL); 1819 if (!ip->ino_table) 1820 return -ENOMEM; 1821 1822 for (i = 0; i < ip->num_intrs; i++) { 1823 struct ino_blob *b = &ip->ino_table[i]; 1824 b->intr = i + 1; 1825 b->ino = ino[i]; 1826 } 1827 1828 return 0; 1829 } 1830 1831 static int grab_mdesc_irq_props(struct mdesc_handle *mdesc, 1832 struct platform_device *dev, 1833 struct spu_mdesc_info *ip, 1834 const char *node_name) 1835 { 1836 const unsigned int *reg; 1837 u64 node; 1838 1839 reg = of_get_property(dev->dev.of_node, "reg", NULL); 1840 if (!reg) 1841 return -ENODEV; 1842 1843 mdesc_for_each_node_by_name(mdesc, node, "virtual-device") { 1844 const char *name; 1845 const u64 *chdl; 1846 1847 name = mdesc_get_property(mdesc, node, "name", NULL); 1848 if (!name || strcmp(name, node_name)) 1849 continue; 1850 chdl = mdesc_get_property(mdesc, node, "cfg-handle", NULL); 1851 if (!chdl || (*chdl != *reg)) 1852 continue; 1853 ip->cfg_handle = *chdl; 1854 return get_irq_props(mdesc, node, ip); 1855 } 1856 1857 return -ENODEV; 1858 } 1859 1860 static unsigned long n2_spu_hvapi_major; 1861 static unsigned long n2_spu_hvapi_minor; 1862 1863 static int n2_spu_hvapi_register(void) 1864 { 1865 int err; 1866 1867 n2_spu_hvapi_major = 2; 1868 n2_spu_hvapi_minor = 0; 1869 1870 err = sun4v_hvapi_register(HV_GRP_NCS, 1871 n2_spu_hvapi_major, 1872 &n2_spu_hvapi_minor); 1873 1874 if (!err) 1875 pr_info("Registered NCS HVAPI version %lu.%lu\n", 1876 n2_spu_hvapi_major, 1877 n2_spu_hvapi_minor); 1878 1879 return err; 1880 } 1881 1882 static void n2_spu_hvapi_unregister(void) 1883 { 1884 sun4v_hvapi_unregister(HV_GRP_NCS); 1885 } 1886 1887 static int global_ref; 1888 1889 static int grab_global_resources(void) 1890 { 1891 int err = 0; 1892 1893 mutex_lock(&spu_lock); 1894 1895 if (global_ref++) 1896 goto out; 1897 1898 err = n2_spu_hvapi_register(); 1899 if (err) 1900 goto out; 1901 1902 err = queue_cache_init(); 1903 if (err) 1904 goto out_hvapi_release; 1905 1906 err = -ENOMEM; 1907 cpu_to_cwq = kcalloc(NR_CPUS, sizeof(struct spu_queue *), 1908 GFP_KERNEL); 1909 if (!cpu_to_cwq) 1910 goto out_queue_cache_destroy; 1911 1912 cpu_to_mau = kcalloc(NR_CPUS, sizeof(struct spu_queue *), 1913 GFP_KERNEL); 1914 if (!cpu_to_mau) 1915 goto out_free_cwq_table; 1916 1917 err = 0; 1918 1919 out: 1920 if (err) 1921 global_ref--; 1922 mutex_unlock(&spu_lock); 1923 return err; 1924 1925 out_free_cwq_table: 1926 kfree(cpu_to_cwq); 1927 cpu_to_cwq = NULL; 1928 1929 out_queue_cache_destroy: 1930 queue_cache_destroy(); 1931 1932 out_hvapi_release: 1933 n2_spu_hvapi_unregister(); 1934 goto out; 1935 } 1936 1937 static void release_global_resources(void) 1938 { 1939 mutex_lock(&spu_lock); 1940 if (!--global_ref) { 1941 kfree(cpu_to_cwq); 1942 cpu_to_cwq = NULL; 1943 1944 kfree(cpu_to_mau); 1945 cpu_to_mau = NULL; 1946 1947 queue_cache_destroy(); 1948 n2_spu_hvapi_unregister(); 1949 } 1950 mutex_unlock(&spu_lock); 1951 } 1952 1953 static struct n2_crypto *alloc_n2cp(void) 1954 { 1955 struct n2_crypto *np = kzalloc(sizeof(struct n2_crypto), GFP_KERNEL); 1956 1957 if (np) 1958 INIT_LIST_HEAD(&np->cwq_list); 1959 1960 return np; 1961 } 1962 1963 static void free_n2cp(struct n2_crypto *np) 1964 { 1965 kfree(np->cwq_info.ino_table); 1966 np->cwq_info.ino_table = NULL; 1967 1968 kfree(np); 1969 } 1970 1971 static void n2_spu_driver_version(void) 1972 { 1973 static int n2_spu_version_printed; 1974 1975 if (n2_spu_version_printed++ == 0) 1976 pr_info("%s", version); 1977 } 1978 1979 static int n2_crypto_probe(struct platform_device *dev) 1980 { 1981 struct mdesc_handle *mdesc; 1982 struct n2_crypto *np; 1983 int err; 1984 1985 n2_spu_driver_version(); 1986 1987 pr_info("Found N2CP at %pOF\n", dev->dev.of_node); 1988 1989 np = alloc_n2cp(); 1990 if (!np) { 1991 dev_err(&dev->dev, "%pOF: Unable to allocate n2cp.\n", 1992 dev->dev.of_node); 1993 return -ENOMEM; 1994 } 1995 1996 err = grab_global_resources(); 1997 if (err) { 1998 dev_err(&dev->dev, "%pOF: Unable to grab global resources.\n", 1999 dev->dev.of_node); 2000 goto out_free_n2cp; 2001 } 2002 2003 mdesc = mdesc_grab(); 2004 2005 if (!mdesc) { 2006 dev_err(&dev->dev, "%pOF: Unable to grab MDESC.\n", 2007 dev->dev.of_node); 2008 err = -ENODEV; 2009 goto out_free_global; 2010 } 2011 err = grab_mdesc_irq_props(mdesc, dev, &np->cwq_info, "n2cp"); 2012 if (err) { 2013 dev_err(&dev->dev, "%pOF: Unable to grab IRQ props.\n", 2014 dev->dev.of_node); 2015 mdesc_release(mdesc); 2016 goto out_free_global; 2017 } 2018 2019 err = spu_mdesc_scan(mdesc, dev, &np->cwq_info, &np->cwq_list, 2020 "cwq", HV_NCS_QTYPE_CWQ, cwq_intr, 2021 cpu_to_cwq); 2022 mdesc_release(mdesc); 2023 2024 if (err) { 2025 dev_err(&dev->dev, "%pOF: CWQ MDESC scan failed.\n", 2026 dev->dev.of_node); 2027 goto out_free_global; 2028 } 2029 2030 err = n2_register_algs(); 2031 if (err) { 2032 dev_err(&dev->dev, "%pOF: Unable to register algorithms.\n", 2033 dev->dev.of_node); 2034 goto out_free_spu_list; 2035 } 2036 2037 dev_set_drvdata(&dev->dev, np); 2038 2039 return 0; 2040 2041 out_free_spu_list: 2042 spu_list_destroy(&np->cwq_list); 2043 2044 out_free_global: 2045 release_global_resources(); 2046 2047 out_free_n2cp: 2048 free_n2cp(np); 2049 2050 return err; 2051 } 2052 2053 static int n2_crypto_remove(struct platform_device *dev) 2054 { 2055 struct n2_crypto *np = dev_get_drvdata(&dev->dev); 2056 2057 n2_unregister_algs(); 2058 2059 spu_list_destroy(&np->cwq_list); 2060 2061 release_global_resources(); 2062 2063 free_n2cp(np); 2064 2065 return 0; 2066 } 2067 2068 static struct n2_mau *alloc_ncp(void) 2069 { 2070 struct n2_mau *mp = kzalloc(sizeof(struct n2_mau), GFP_KERNEL); 2071 2072 if (mp) 2073 INIT_LIST_HEAD(&mp->mau_list); 2074 2075 return mp; 2076 } 2077 2078 static void free_ncp(struct n2_mau *mp) 2079 { 2080 kfree(mp->mau_info.ino_table); 2081 mp->mau_info.ino_table = NULL; 2082 2083 kfree(mp); 2084 } 2085 2086 static int n2_mau_probe(struct platform_device *dev) 2087 { 2088 struct mdesc_handle *mdesc; 2089 struct n2_mau *mp; 2090 int err; 2091 2092 n2_spu_driver_version(); 2093 2094 pr_info("Found NCP at %pOF\n", dev->dev.of_node); 2095 2096 mp = alloc_ncp(); 2097 if (!mp) { 2098 dev_err(&dev->dev, "%pOF: Unable to allocate ncp.\n", 2099 dev->dev.of_node); 2100 return -ENOMEM; 2101 } 2102 2103 err = grab_global_resources(); 2104 if (err) { 2105 dev_err(&dev->dev, "%pOF: Unable to grab global resources.\n", 2106 dev->dev.of_node); 2107 goto out_free_ncp; 2108 } 2109 2110 mdesc = mdesc_grab(); 2111 2112 if (!mdesc) { 2113 dev_err(&dev->dev, "%pOF: Unable to grab MDESC.\n", 2114 dev->dev.of_node); 2115 err = -ENODEV; 2116 goto out_free_global; 2117 } 2118 2119 err = grab_mdesc_irq_props(mdesc, dev, &mp->mau_info, "ncp"); 2120 if (err) { 2121 dev_err(&dev->dev, "%pOF: Unable to grab IRQ props.\n", 2122 dev->dev.of_node); 2123 mdesc_release(mdesc); 2124 goto out_free_global; 2125 } 2126 2127 err = spu_mdesc_scan(mdesc, dev, &mp->mau_info, &mp->mau_list, 2128 "mau", HV_NCS_QTYPE_MAU, mau_intr, 2129 cpu_to_mau); 2130 mdesc_release(mdesc); 2131 2132 if (err) { 2133 dev_err(&dev->dev, "%pOF: MAU MDESC scan failed.\n", 2134 dev->dev.of_node); 2135 goto out_free_global; 2136 } 2137 2138 dev_set_drvdata(&dev->dev, mp); 2139 2140 return 0; 2141 2142 out_free_global: 2143 release_global_resources(); 2144 2145 out_free_ncp: 2146 free_ncp(mp); 2147 2148 return err; 2149 } 2150 2151 static int n2_mau_remove(struct platform_device *dev) 2152 { 2153 struct n2_mau *mp = dev_get_drvdata(&dev->dev); 2154 2155 spu_list_destroy(&mp->mau_list); 2156 2157 release_global_resources(); 2158 2159 free_ncp(mp); 2160 2161 return 0; 2162 } 2163 2164 static const struct of_device_id n2_crypto_match[] = { 2165 { 2166 .name = "n2cp", 2167 .compatible = "SUNW,n2-cwq", 2168 }, 2169 { 2170 .name = "n2cp", 2171 .compatible = "SUNW,vf-cwq", 2172 }, 2173 { 2174 .name = "n2cp", 2175 .compatible = "SUNW,kt-cwq", 2176 }, 2177 {}, 2178 }; 2179 2180 MODULE_DEVICE_TABLE(of, n2_crypto_match); 2181 2182 static struct platform_driver n2_crypto_driver = { 2183 .driver = { 2184 .name = "n2cp", 2185 .of_match_table = n2_crypto_match, 2186 }, 2187 .probe = n2_crypto_probe, 2188 .remove = n2_crypto_remove, 2189 }; 2190 2191 static const struct of_device_id n2_mau_match[] = { 2192 { 2193 .name = "ncp", 2194 .compatible = "SUNW,n2-mau", 2195 }, 2196 { 2197 .name = "ncp", 2198 .compatible = "SUNW,vf-mau", 2199 }, 2200 { 2201 .name = "ncp", 2202 .compatible = "SUNW,kt-mau", 2203 }, 2204 {}, 2205 }; 2206 2207 MODULE_DEVICE_TABLE(of, n2_mau_match); 2208 2209 static struct platform_driver n2_mau_driver = { 2210 .driver = { 2211 .name = "ncp", 2212 .of_match_table = n2_mau_match, 2213 }, 2214 .probe = n2_mau_probe, 2215 .remove = n2_mau_remove, 2216 }; 2217 2218 static struct platform_driver * const drivers[] = { 2219 &n2_crypto_driver, 2220 &n2_mau_driver, 2221 }; 2222 2223 static int __init n2_init(void) 2224 { 2225 return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); 2226 } 2227 2228 static void __exit n2_exit(void) 2229 { 2230 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); 2231 } 2232 2233 module_init(n2_init); 2234 module_exit(n2_exit); 2235