1 /* n2_core.c: Niagara2 Stream Processing Unit (SPU) crypto support. 2 * 3 * Copyright (C) 2010, 2011 David S. Miller <davem@davemloft.net> 4 */ 5 6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 7 8 #include <linux/kernel.h> 9 #include <linux/module.h> 10 #include <linux/of.h> 11 #include <linux/of_device.h> 12 #include <linux/cpumask.h> 13 #include <linux/slab.h> 14 #include <linux/interrupt.h> 15 #include <linux/crypto.h> 16 #include <crypto/md5.h> 17 #include <crypto/sha.h> 18 #include <crypto/aes.h> 19 #include <crypto/des.h> 20 #include <linux/mutex.h> 21 #include <linux/delay.h> 22 #include <linux/sched.h> 23 24 #include <crypto/internal/hash.h> 25 #include <crypto/scatterwalk.h> 26 #include <crypto/algapi.h> 27 28 #include <asm/hypervisor.h> 29 #include <asm/mdesc.h> 30 31 #include "n2_core.h" 32 33 #define DRV_MODULE_NAME "n2_crypto" 34 #define DRV_MODULE_VERSION "0.2" 35 #define DRV_MODULE_RELDATE "July 28, 2011" 36 37 static const char version[] = 38 DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; 39 40 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); 41 MODULE_DESCRIPTION("Niagara2 Crypto driver"); 42 MODULE_LICENSE("GPL"); 43 MODULE_VERSION(DRV_MODULE_VERSION); 44 45 #define N2_CRA_PRIORITY 200 46 47 static DEFINE_MUTEX(spu_lock); 48 49 struct spu_queue { 50 cpumask_t sharing; 51 unsigned long qhandle; 52 53 spinlock_t lock; 54 u8 q_type; 55 void *q; 56 unsigned long head; 57 unsigned long tail; 58 struct list_head jobs; 59 60 unsigned long devino; 61 62 char irq_name[32]; 63 unsigned int irq; 64 65 struct list_head list; 66 }; 67 68 struct spu_qreg { 69 struct spu_queue *queue; 70 unsigned long type; 71 }; 72 73 static struct spu_queue **cpu_to_cwq; 74 static struct spu_queue **cpu_to_mau; 75 76 static unsigned long spu_next_offset(struct spu_queue *q, unsigned long off) 77 { 78 if (q->q_type == HV_NCS_QTYPE_MAU) { 79 off += MAU_ENTRY_SIZE; 80 if (off == (MAU_ENTRY_SIZE * MAU_NUM_ENTRIES)) 81 off = 0; 82 } else { 83 off += CWQ_ENTRY_SIZE; 84 if (off == (CWQ_ENTRY_SIZE * CWQ_NUM_ENTRIES)) 85 off = 0; 86 } 87 return off; 88 } 89 90 struct n2_request_common { 91 struct list_head entry; 92 unsigned int offset; 93 }; 94 #define OFFSET_NOT_RUNNING (~(unsigned int)0) 95 96 /* An async job request records the final tail value it used in 97 * n2_request_common->offset, test to see if that offset is in 98 * the range old_head, new_head, inclusive. 99 */ 100 static inline bool job_finished(struct spu_queue *q, unsigned int offset, 101 unsigned long old_head, unsigned long new_head) 102 { 103 if (old_head <= new_head) { 104 if (offset > old_head && offset <= new_head) 105 return true; 106 } else { 107 if (offset > old_head || offset <= new_head) 108 return true; 109 } 110 return false; 111 } 112 113 /* When the HEAD marker is unequal to the actual HEAD, we get 114 * a virtual device INO interrupt. We should process the 115 * completed CWQ entries and adjust the HEAD marker to clear 116 * the IRQ. 117 */ 118 static irqreturn_t cwq_intr(int irq, void *dev_id) 119 { 120 unsigned long off, new_head, hv_ret; 121 struct spu_queue *q = dev_id; 122 123 pr_err("CPU[%d]: Got CWQ interrupt for qhdl[%lx]\n", 124 smp_processor_id(), q->qhandle); 125 126 spin_lock(&q->lock); 127 128 hv_ret = sun4v_ncs_gethead(q->qhandle, &new_head); 129 130 pr_err("CPU[%d]: CWQ gethead[%lx] hv_ret[%lu]\n", 131 smp_processor_id(), new_head, hv_ret); 132 133 for (off = q->head; off != new_head; off = spu_next_offset(q, off)) { 134 /* XXX ... XXX */ 135 } 136 137 hv_ret = sun4v_ncs_sethead_marker(q->qhandle, new_head); 138 if (hv_ret == HV_EOK) 139 q->head = new_head; 140 141 spin_unlock(&q->lock); 142 143 return IRQ_HANDLED; 144 } 145 146 static irqreturn_t mau_intr(int irq, void *dev_id) 147 { 148 struct spu_queue *q = dev_id; 149 unsigned long head, hv_ret; 150 151 spin_lock(&q->lock); 152 153 pr_err("CPU[%d]: Got MAU interrupt for qhdl[%lx]\n", 154 smp_processor_id(), q->qhandle); 155 156 hv_ret = sun4v_ncs_gethead(q->qhandle, &head); 157 158 pr_err("CPU[%d]: MAU gethead[%lx] hv_ret[%lu]\n", 159 smp_processor_id(), head, hv_ret); 160 161 sun4v_ncs_sethead_marker(q->qhandle, head); 162 163 spin_unlock(&q->lock); 164 165 return IRQ_HANDLED; 166 } 167 168 static void *spu_queue_next(struct spu_queue *q, void *cur) 169 { 170 return q->q + spu_next_offset(q, cur - q->q); 171 } 172 173 static int spu_queue_num_free(struct spu_queue *q) 174 { 175 unsigned long head = q->head; 176 unsigned long tail = q->tail; 177 unsigned long end = (CWQ_ENTRY_SIZE * CWQ_NUM_ENTRIES); 178 unsigned long diff; 179 180 if (head > tail) 181 diff = head - tail; 182 else 183 diff = (end - tail) + head; 184 185 return (diff / CWQ_ENTRY_SIZE) - 1; 186 } 187 188 static void *spu_queue_alloc(struct spu_queue *q, int num_entries) 189 { 190 int avail = spu_queue_num_free(q); 191 192 if (avail >= num_entries) 193 return q->q + q->tail; 194 195 return NULL; 196 } 197 198 static unsigned long spu_queue_submit(struct spu_queue *q, void *last) 199 { 200 unsigned long hv_ret, new_tail; 201 202 new_tail = spu_next_offset(q, last - q->q); 203 204 hv_ret = sun4v_ncs_settail(q->qhandle, new_tail); 205 if (hv_ret == HV_EOK) 206 q->tail = new_tail; 207 return hv_ret; 208 } 209 210 static u64 control_word_base(unsigned int len, unsigned int hmac_key_len, 211 int enc_type, int auth_type, 212 unsigned int hash_len, 213 bool sfas, bool sob, bool eob, bool encrypt, 214 int opcode) 215 { 216 u64 word = (len - 1) & CONTROL_LEN; 217 218 word |= ((u64) opcode << CONTROL_OPCODE_SHIFT); 219 word |= ((u64) enc_type << CONTROL_ENC_TYPE_SHIFT); 220 word |= ((u64) auth_type << CONTROL_AUTH_TYPE_SHIFT); 221 if (sfas) 222 word |= CONTROL_STORE_FINAL_AUTH_STATE; 223 if (sob) 224 word |= CONTROL_START_OF_BLOCK; 225 if (eob) 226 word |= CONTROL_END_OF_BLOCK; 227 if (encrypt) 228 word |= CONTROL_ENCRYPT; 229 if (hmac_key_len) 230 word |= ((u64) (hmac_key_len - 1)) << CONTROL_HMAC_KEY_LEN_SHIFT; 231 if (hash_len) 232 word |= ((u64) (hash_len - 1)) << CONTROL_HASH_LEN_SHIFT; 233 234 return word; 235 } 236 237 #if 0 238 static inline bool n2_should_run_async(struct spu_queue *qp, int this_len) 239 { 240 if (this_len >= 64 || 241 qp->head != qp->tail) 242 return true; 243 return false; 244 } 245 #endif 246 247 struct n2_ahash_alg { 248 struct list_head entry; 249 const u8 *hash_zero; 250 const u32 *hash_init; 251 u8 hw_op_hashsz; 252 u8 digest_size; 253 u8 auth_type; 254 u8 hmac_type; 255 struct ahash_alg alg; 256 }; 257 258 static inline struct n2_ahash_alg *n2_ahash_alg(struct crypto_tfm *tfm) 259 { 260 struct crypto_alg *alg = tfm->__crt_alg; 261 struct ahash_alg *ahash_alg; 262 263 ahash_alg = container_of(alg, struct ahash_alg, halg.base); 264 265 return container_of(ahash_alg, struct n2_ahash_alg, alg); 266 } 267 268 struct n2_hmac_alg { 269 const char *child_alg; 270 struct n2_ahash_alg derived; 271 }; 272 273 static inline struct n2_hmac_alg *n2_hmac_alg(struct crypto_tfm *tfm) 274 { 275 struct crypto_alg *alg = tfm->__crt_alg; 276 struct ahash_alg *ahash_alg; 277 278 ahash_alg = container_of(alg, struct ahash_alg, halg.base); 279 280 return container_of(ahash_alg, struct n2_hmac_alg, derived.alg); 281 } 282 283 struct n2_hash_ctx { 284 struct crypto_ahash *fallback_tfm; 285 }; 286 287 #define N2_HASH_KEY_MAX 32 /* HW limit for all HMAC requests */ 288 289 struct n2_hmac_ctx { 290 struct n2_hash_ctx base; 291 292 struct crypto_shash *child_shash; 293 294 int hash_key_len; 295 unsigned char hash_key[N2_HASH_KEY_MAX]; 296 }; 297 298 struct n2_hash_req_ctx { 299 union { 300 struct md5_state md5; 301 struct sha1_state sha1; 302 struct sha256_state sha256; 303 } u; 304 305 struct ahash_request fallback_req; 306 }; 307 308 static int n2_hash_async_init(struct ahash_request *req) 309 { 310 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 311 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 312 struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm); 313 314 ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm); 315 rctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; 316 317 return crypto_ahash_init(&rctx->fallback_req); 318 } 319 320 static int n2_hash_async_update(struct ahash_request *req) 321 { 322 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 323 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 324 struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm); 325 326 ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm); 327 rctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; 328 rctx->fallback_req.nbytes = req->nbytes; 329 rctx->fallback_req.src = req->src; 330 331 return crypto_ahash_update(&rctx->fallback_req); 332 } 333 334 static int n2_hash_async_final(struct ahash_request *req) 335 { 336 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 337 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 338 struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm); 339 340 ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm); 341 rctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; 342 rctx->fallback_req.result = req->result; 343 344 return crypto_ahash_final(&rctx->fallback_req); 345 } 346 347 static int n2_hash_async_finup(struct ahash_request *req) 348 { 349 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 350 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 351 struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm); 352 353 ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm); 354 rctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; 355 rctx->fallback_req.nbytes = req->nbytes; 356 rctx->fallback_req.src = req->src; 357 rctx->fallback_req.result = req->result; 358 359 return crypto_ahash_finup(&rctx->fallback_req); 360 } 361 362 static int n2_hash_async_noimport(struct ahash_request *req, const void *in) 363 { 364 return -ENOSYS; 365 } 366 367 static int n2_hash_async_noexport(struct ahash_request *req, void *out) 368 { 369 return -ENOSYS; 370 } 371 372 static int n2_hash_cra_init(struct crypto_tfm *tfm) 373 { 374 const char *fallback_driver_name = crypto_tfm_alg_name(tfm); 375 struct crypto_ahash *ahash = __crypto_ahash_cast(tfm); 376 struct n2_hash_ctx *ctx = crypto_ahash_ctx(ahash); 377 struct crypto_ahash *fallback_tfm; 378 int err; 379 380 fallback_tfm = crypto_alloc_ahash(fallback_driver_name, 0, 381 CRYPTO_ALG_NEED_FALLBACK); 382 if (IS_ERR(fallback_tfm)) { 383 pr_warning("Fallback driver '%s' could not be loaded!\n", 384 fallback_driver_name); 385 err = PTR_ERR(fallback_tfm); 386 goto out; 387 } 388 389 crypto_ahash_set_reqsize(ahash, (sizeof(struct n2_hash_req_ctx) + 390 crypto_ahash_reqsize(fallback_tfm))); 391 392 ctx->fallback_tfm = fallback_tfm; 393 return 0; 394 395 out: 396 return err; 397 } 398 399 static void n2_hash_cra_exit(struct crypto_tfm *tfm) 400 { 401 struct crypto_ahash *ahash = __crypto_ahash_cast(tfm); 402 struct n2_hash_ctx *ctx = crypto_ahash_ctx(ahash); 403 404 crypto_free_ahash(ctx->fallback_tfm); 405 } 406 407 static int n2_hmac_cra_init(struct crypto_tfm *tfm) 408 { 409 const char *fallback_driver_name = crypto_tfm_alg_name(tfm); 410 struct crypto_ahash *ahash = __crypto_ahash_cast(tfm); 411 struct n2_hmac_ctx *ctx = crypto_ahash_ctx(ahash); 412 struct n2_hmac_alg *n2alg = n2_hmac_alg(tfm); 413 struct crypto_ahash *fallback_tfm; 414 struct crypto_shash *child_shash; 415 int err; 416 417 fallback_tfm = crypto_alloc_ahash(fallback_driver_name, 0, 418 CRYPTO_ALG_NEED_FALLBACK); 419 if (IS_ERR(fallback_tfm)) { 420 pr_warning("Fallback driver '%s' could not be loaded!\n", 421 fallback_driver_name); 422 err = PTR_ERR(fallback_tfm); 423 goto out; 424 } 425 426 child_shash = crypto_alloc_shash(n2alg->child_alg, 0, 0); 427 if (IS_ERR(child_shash)) { 428 pr_warning("Child shash '%s' could not be loaded!\n", 429 n2alg->child_alg); 430 err = PTR_ERR(child_shash); 431 goto out_free_fallback; 432 } 433 434 crypto_ahash_set_reqsize(ahash, (sizeof(struct n2_hash_req_ctx) + 435 crypto_ahash_reqsize(fallback_tfm))); 436 437 ctx->child_shash = child_shash; 438 ctx->base.fallback_tfm = fallback_tfm; 439 return 0; 440 441 out_free_fallback: 442 crypto_free_ahash(fallback_tfm); 443 444 out: 445 return err; 446 } 447 448 static void n2_hmac_cra_exit(struct crypto_tfm *tfm) 449 { 450 struct crypto_ahash *ahash = __crypto_ahash_cast(tfm); 451 struct n2_hmac_ctx *ctx = crypto_ahash_ctx(ahash); 452 453 crypto_free_ahash(ctx->base.fallback_tfm); 454 crypto_free_shash(ctx->child_shash); 455 } 456 457 static int n2_hmac_async_setkey(struct crypto_ahash *tfm, const u8 *key, 458 unsigned int keylen) 459 { 460 struct n2_hmac_ctx *ctx = crypto_ahash_ctx(tfm); 461 struct crypto_shash *child_shash = ctx->child_shash; 462 struct crypto_ahash *fallback_tfm; 463 SHASH_DESC_ON_STACK(shash, child_shash); 464 int err, bs, ds; 465 466 fallback_tfm = ctx->base.fallback_tfm; 467 err = crypto_ahash_setkey(fallback_tfm, key, keylen); 468 if (err) 469 return err; 470 471 shash->tfm = child_shash; 472 shash->flags = crypto_ahash_get_flags(tfm) & 473 CRYPTO_TFM_REQ_MAY_SLEEP; 474 475 bs = crypto_shash_blocksize(child_shash); 476 ds = crypto_shash_digestsize(child_shash); 477 BUG_ON(ds > N2_HASH_KEY_MAX); 478 if (keylen > bs) { 479 err = crypto_shash_digest(shash, key, keylen, 480 ctx->hash_key); 481 if (err) 482 return err; 483 keylen = ds; 484 } else if (keylen <= N2_HASH_KEY_MAX) 485 memcpy(ctx->hash_key, key, keylen); 486 487 ctx->hash_key_len = keylen; 488 489 return err; 490 } 491 492 static unsigned long wait_for_tail(struct spu_queue *qp) 493 { 494 unsigned long head, hv_ret; 495 496 do { 497 hv_ret = sun4v_ncs_gethead(qp->qhandle, &head); 498 if (hv_ret != HV_EOK) { 499 pr_err("Hypervisor error on gethead\n"); 500 break; 501 } 502 if (head == qp->tail) { 503 qp->head = head; 504 break; 505 } 506 } while (1); 507 return hv_ret; 508 } 509 510 static unsigned long submit_and_wait_for_tail(struct spu_queue *qp, 511 struct cwq_initial_entry *ent) 512 { 513 unsigned long hv_ret = spu_queue_submit(qp, ent); 514 515 if (hv_ret == HV_EOK) 516 hv_ret = wait_for_tail(qp); 517 518 return hv_ret; 519 } 520 521 static int n2_do_async_digest(struct ahash_request *req, 522 unsigned int auth_type, unsigned int digest_size, 523 unsigned int result_size, void *hash_loc, 524 unsigned long auth_key, unsigned int auth_key_len) 525 { 526 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 527 struct cwq_initial_entry *ent; 528 struct crypto_hash_walk walk; 529 struct spu_queue *qp; 530 unsigned long flags; 531 int err = -ENODEV; 532 int nbytes, cpu; 533 534 /* The total effective length of the operation may not 535 * exceed 2^16. 536 */ 537 if (unlikely(req->nbytes > (1 << 16))) { 538 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 539 struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm); 540 541 ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm); 542 rctx->fallback_req.base.flags = 543 req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; 544 rctx->fallback_req.nbytes = req->nbytes; 545 rctx->fallback_req.src = req->src; 546 rctx->fallback_req.result = req->result; 547 548 return crypto_ahash_digest(&rctx->fallback_req); 549 } 550 551 nbytes = crypto_hash_walk_first(req, &walk); 552 553 cpu = get_cpu(); 554 qp = cpu_to_cwq[cpu]; 555 if (!qp) 556 goto out; 557 558 spin_lock_irqsave(&qp->lock, flags); 559 560 /* XXX can do better, improve this later by doing a by-hand scatterlist 561 * XXX walk, etc. 562 */ 563 ent = qp->q + qp->tail; 564 565 ent->control = control_word_base(nbytes, auth_key_len, 0, 566 auth_type, digest_size, 567 false, true, false, false, 568 OPCODE_INPLACE_BIT | 569 OPCODE_AUTH_MAC); 570 ent->src_addr = __pa(walk.data); 571 ent->auth_key_addr = auth_key; 572 ent->auth_iv_addr = __pa(hash_loc); 573 ent->final_auth_state_addr = 0UL; 574 ent->enc_key_addr = 0UL; 575 ent->enc_iv_addr = 0UL; 576 ent->dest_addr = __pa(hash_loc); 577 578 nbytes = crypto_hash_walk_done(&walk, 0); 579 while (nbytes > 0) { 580 ent = spu_queue_next(qp, ent); 581 582 ent->control = (nbytes - 1); 583 ent->src_addr = __pa(walk.data); 584 ent->auth_key_addr = 0UL; 585 ent->auth_iv_addr = 0UL; 586 ent->final_auth_state_addr = 0UL; 587 ent->enc_key_addr = 0UL; 588 ent->enc_iv_addr = 0UL; 589 ent->dest_addr = 0UL; 590 591 nbytes = crypto_hash_walk_done(&walk, 0); 592 } 593 ent->control |= CONTROL_END_OF_BLOCK; 594 595 if (submit_and_wait_for_tail(qp, ent) != HV_EOK) 596 err = -EINVAL; 597 else 598 err = 0; 599 600 spin_unlock_irqrestore(&qp->lock, flags); 601 602 if (!err) 603 memcpy(req->result, hash_loc, result_size); 604 out: 605 put_cpu(); 606 607 return err; 608 } 609 610 static int n2_hash_async_digest(struct ahash_request *req) 611 { 612 struct n2_ahash_alg *n2alg = n2_ahash_alg(req->base.tfm); 613 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 614 int ds; 615 616 ds = n2alg->digest_size; 617 if (unlikely(req->nbytes == 0)) { 618 memcpy(req->result, n2alg->hash_zero, ds); 619 return 0; 620 } 621 memcpy(&rctx->u, n2alg->hash_init, n2alg->hw_op_hashsz); 622 623 return n2_do_async_digest(req, n2alg->auth_type, 624 n2alg->hw_op_hashsz, ds, 625 &rctx->u, 0UL, 0); 626 } 627 628 static int n2_hmac_async_digest(struct ahash_request *req) 629 { 630 struct n2_hmac_alg *n2alg = n2_hmac_alg(req->base.tfm); 631 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 632 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); 633 struct n2_hmac_ctx *ctx = crypto_ahash_ctx(tfm); 634 int ds; 635 636 ds = n2alg->derived.digest_size; 637 if (unlikely(req->nbytes == 0) || 638 unlikely(ctx->hash_key_len > N2_HASH_KEY_MAX)) { 639 struct n2_hash_req_ctx *rctx = ahash_request_ctx(req); 640 struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm); 641 642 ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm); 643 rctx->fallback_req.base.flags = 644 req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP; 645 rctx->fallback_req.nbytes = req->nbytes; 646 rctx->fallback_req.src = req->src; 647 rctx->fallback_req.result = req->result; 648 649 return crypto_ahash_digest(&rctx->fallback_req); 650 } 651 memcpy(&rctx->u, n2alg->derived.hash_init, 652 n2alg->derived.hw_op_hashsz); 653 654 return n2_do_async_digest(req, n2alg->derived.hmac_type, 655 n2alg->derived.hw_op_hashsz, ds, 656 &rctx->u, 657 __pa(&ctx->hash_key), 658 ctx->hash_key_len); 659 } 660 661 struct n2_cipher_context { 662 int key_len; 663 int enc_type; 664 union { 665 u8 aes[AES_MAX_KEY_SIZE]; 666 u8 des[DES_KEY_SIZE]; 667 u8 des3[3 * DES_KEY_SIZE]; 668 u8 arc4[258]; /* S-box, X, Y */ 669 } key; 670 }; 671 672 #define N2_CHUNK_ARR_LEN 16 673 674 struct n2_crypto_chunk { 675 struct list_head entry; 676 unsigned long iv_paddr : 44; 677 unsigned long arr_len : 20; 678 unsigned long dest_paddr; 679 unsigned long dest_final; 680 struct { 681 unsigned long src_paddr : 44; 682 unsigned long src_len : 20; 683 } arr[N2_CHUNK_ARR_LEN]; 684 }; 685 686 struct n2_request_context { 687 struct ablkcipher_walk walk; 688 struct list_head chunk_list; 689 struct n2_crypto_chunk chunk; 690 u8 temp_iv[16]; 691 }; 692 693 /* The SPU allows some level of flexibility for partial cipher blocks 694 * being specified in a descriptor. 695 * 696 * It merely requires that every descriptor's length field is at least 697 * as large as the cipher block size. This means that a cipher block 698 * can span at most 2 descriptors. However, this does not allow a 699 * partial block to span into the final descriptor as that would 700 * violate the rule (since every descriptor's length must be at lest 701 * the block size). So, for example, assuming an 8 byte block size: 702 * 703 * 0xe --> 0xa --> 0x8 704 * 705 * is a valid length sequence, whereas: 706 * 707 * 0xe --> 0xb --> 0x7 708 * 709 * is not a valid sequence. 710 */ 711 712 struct n2_cipher_alg { 713 struct list_head entry; 714 u8 enc_type; 715 struct crypto_alg alg; 716 }; 717 718 static inline struct n2_cipher_alg *n2_cipher_alg(struct crypto_tfm *tfm) 719 { 720 struct crypto_alg *alg = tfm->__crt_alg; 721 722 return container_of(alg, struct n2_cipher_alg, alg); 723 } 724 725 struct n2_cipher_request_context { 726 struct ablkcipher_walk walk; 727 }; 728 729 static int n2_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key, 730 unsigned int keylen) 731 { 732 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); 733 struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm); 734 struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm); 735 736 ctx->enc_type = (n2alg->enc_type & ENC_TYPE_CHAINING_MASK); 737 738 switch (keylen) { 739 case AES_KEYSIZE_128: 740 ctx->enc_type |= ENC_TYPE_ALG_AES128; 741 break; 742 case AES_KEYSIZE_192: 743 ctx->enc_type |= ENC_TYPE_ALG_AES192; 744 break; 745 case AES_KEYSIZE_256: 746 ctx->enc_type |= ENC_TYPE_ALG_AES256; 747 break; 748 default: 749 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); 750 return -EINVAL; 751 } 752 753 ctx->key_len = keylen; 754 memcpy(ctx->key.aes, key, keylen); 755 return 0; 756 } 757 758 static int n2_des_setkey(struct crypto_ablkcipher *cipher, const u8 *key, 759 unsigned int keylen) 760 { 761 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); 762 struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm); 763 struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm); 764 u32 tmp[DES_EXPKEY_WORDS]; 765 int err; 766 767 ctx->enc_type = n2alg->enc_type; 768 769 if (keylen != DES_KEY_SIZE) { 770 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); 771 return -EINVAL; 772 } 773 774 err = des_ekey(tmp, key); 775 if (err == 0 && (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) { 776 tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY; 777 return -EINVAL; 778 } 779 780 ctx->key_len = keylen; 781 memcpy(ctx->key.des, key, keylen); 782 return 0; 783 } 784 785 static int n2_3des_setkey(struct crypto_ablkcipher *cipher, const u8 *key, 786 unsigned int keylen) 787 { 788 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); 789 struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm); 790 struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm); 791 792 ctx->enc_type = n2alg->enc_type; 793 794 if (keylen != (3 * DES_KEY_SIZE)) { 795 crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); 796 return -EINVAL; 797 } 798 ctx->key_len = keylen; 799 memcpy(ctx->key.des3, key, keylen); 800 return 0; 801 } 802 803 static int n2_arc4_setkey(struct crypto_ablkcipher *cipher, const u8 *key, 804 unsigned int keylen) 805 { 806 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); 807 struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm); 808 struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm); 809 u8 *s = ctx->key.arc4; 810 u8 *x = s + 256; 811 u8 *y = x + 1; 812 int i, j, k; 813 814 ctx->enc_type = n2alg->enc_type; 815 816 j = k = 0; 817 *x = 0; 818 *y = 0; 819 for (i = 0; i < 256; i++) 820 s[i] = i; 821 for (i = 0; i < 256; i++) { 822 u8 a = s[i]; 823 j = (j + key[k] + a) & 0xff; 824 s[i] = s[j]; 825 s[j] = a; 826 if (++k >= keylen) 827 k = 0; 828 } 829 830 return 0; 831 } 832 833 static inline int cipher_descriptor_len(int nbytes, unsigned int block_size) 834 { 835 int this_len = nbytes; 836 837 this_len -= (nbytes & (block_size - 1)); 838 return this_len > (1 << 16) ? (1 << 16) : this_len; 839 } 840 841 static int __n2_crypt_chunk(struct crypto_tfm *tfm, struct n2_crypto_chunk *cp, 842 struct spu_queue *qp, bool encrypt) 843 { 844 struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm); 845 struct cwq_initial_entry *ent; 846 bool in_place; 847 int i; 848 849 ent = spu_queue_alloc(qp, cp->arr_len); 850 if (!ent) { 851 pr_info("queue_alloc() of %d fails\n", 852 cp->arr_len); 853 return -EBUSY; 854 } 855 856 in_place = (cp->dest_paddr == cp->arr[0].src_paddr); 857 858 ent->control = control_word_base(cp->arr[0].src_len, 859 0, ctx->enc_type, 0, 0, 860 false, true, false, encrypt, 861 OPCODE_ENCRYPT | 862 (in_place ? OPCODE_INPLACE_BIT : 0)); 863 ent->src_addr = cp->arr[0].src_paddr; 864 ent->auth_key_addr = 0UL; 865 ent->auth_iv_addr = 0UL; 866 ent->final_auth_state_addr = 0UL; 867 ent->enc_key_addr = __pa(&ctx->key); 868 ent->enc_iv_addr = cp->iv_paddr; 869 ent->dest_addr = (in_place ? 0UL : cp->dest_paddr); 870 871 for (i = 1; i < cp->arr_len; i++) { 872 ent = spu_queue_next(qp, ent); 873 874 ent->control = cp->arr[i].src_len - 1; 875 ent->src_addr = cp->arr[i].src_paddr; 876 ent->auth_key_addr = 0UL; 877 ent->auth_iv_addr = 0UL; 878 ent->final_auth_state_addr = 0UL; 879 ent->enc_key_addr = 0UL; 880 ent->enc_iv_addr = 0UL; 881 ent->dest_addr = 0UL; 882 } 883 ent->control |= CONTROL_END_OF_BLOCK; 884 885 return (spu_queue_submit(qp, ent) != HV_EOK) ? -EINVAL : 0; 886 } 887 888 static int n2_compute_chunks(struct ablkcipher_request *req) 889 { 890 struct n2_request_context *rctx = ablkcipher_request_ctx(req); 891 struct ablkcipher_walk *walk = &rctx->walk; 892 struct n2_crypto_chunk *chunk; 893 unsigned long dest_prev; 894 unsigned int tot_len; 895 bool prev_in_place; 896 int err, nbytes; 897 898 ablkcipher_walk_init(walk, req->dst, req->src, req->nbytes); 899 err = ablkcipher_walk_phys(req, walk); 900 if (err) 901 return err; 902 903 INIT_LIST_HEAD(&rctx->chunk_list); 904 905 chunk = &rctx->chunk; 906 INIT_LIST_HEAD(&chunk->entry); 907 908 chunk->iv_paddr = 0UL; 909 chunk->arr_len = 0; 910 chunk->dest_paddr = 0UL; 911 912 prev_in_place = false; 913 dest_prev = ~0UL; 914 tot_len = 0; 915 916 while ((nbytes = walk->nbytes) != 0) { 917 unsigned long dest_paddr, src_paddr; 918 bool in_place; 919 int this_len; 920 921 src_paddr = (page_to_phys(walk->src.page) + 922 walk->src.offset); 923 dest_paddr = (page_to_phys(walk->dst.page) + 924 walk->dst.offset); 925 in_place = (src_paddr == dest_paddr); 926 this_len = cipher_descriptor_len(nbytes, walk->blocksize); 927 928 if (chunk->arr_len != 0) { 929 if (in_place != prev_in_place || 930 (!prev_in_place && 931 dest_paddr != dest_prev) || 932 chunk->arr_len == N2_CHUNK_ARR_LEN || 933 tot_len + this_len > (1 << 16)) { 934 chunk->dest_final = dest_prev; 935 list_add_tail(&chunk->entry, 936 &rctx->chunk_list); 937 chunk = kzalloc(sizeof(*chunk), GFP_ATOMIC); 938 if (!chunk) { 939 err = -ENOMEM; 940 break; 941 } 942 INIT_LIST_HEAD(&chunk->entry); 943 } 944 } 945 if (chunk->arr_len == 0) { 946 chunk->dest_paddr = dest_paddr; 947 tot_len = 0; 948 } 949 chunk->arr[chunk->arr_len].src_paddr = src_paddr; 950 chunk->arr[chunk->arr_len].src_len = this_len; 951 chunk->arr_len++; 952 953 dest_prev = dest_paddr + this_len; 954 prev_in_place = in_place; 955 tot_len += this_len; 956 957 err = ablkcipher_walk_done(req, walk, nbytes - this_len); 958 if (err) 959 break; 960 } 961 if (!err && chunk->arr_len != 0) { 962 chunk->dest_final = dest_prev; 963 list_add_tail(&chunk->entry, &rctx->chunk_list); 964 } 965 966 return err; 967 } 968 969 static void n2_chunk_complete(struct ablkcipher_request *req, void *final_iv) 970 { 971 struct n2_request_context *rctx = ablkcipher_request_ctx(req); 972 struct n2_crypto_chunk *c, *tmp; 973 974 if (final_iv) 975 memcpy(rctx->walk.iv, final_iv, rctx->walk.blocksize); 976 977 ablkcipher_walk_complete(&rctx->walk); 978 list_for_each_entry_safe(c, tmp, &rctx->chunk_list, entry) { 979 list_del(&c->entry); 980 if (unlikely(c != &rctx->chunk)) 981 kfree(c); 982 } 983 984 } 985 986 static int n2_do_ecb(struct ablkcipher_request *req, bool encrypt) 987 { 988 struct n2_request_context *rctx = ablkcipher_request_ctx(req); 989 struct crypto_tfm *tfm = req->base.tfm; 990 int err = n2_compute_chunks(req); 991 struct n2_crypto_chunk *c, *tmp; 992 unsigned long flags, hv_ret; 993 struct spu_queue *qp; 994 995 if (err) 996 return err; 997 998 qp = cpu_to_cwq[get_cpu()]; 999 err = -ENODEV; 1000 if (!qp) 1001 goto out; 1002 1003 spin_lock_irqsave(&qp->lock, flags); 1004 1005 list_for_each_entry_safe(c, tmp, &rctx->chunk_list, entry) { 1006 err = __n2_crypt_chunk(tfm, c, qp, encrypt); 1007 if (err) 1008 break; 1009 list_del(&c->entry); 1010 if (unlikely(c != &rctx->chunk)) 1011 kfree(c); 1012 } 1013 if (!err) { 1014 hv_ret = wait_for_tail(qp); 1015 if (hv_ret != HV_EOK) 1016 err = -EINVAL; 1017 } 1018 1019 spin_unlock_irqrestore(&qp->lock, flags); 1020 1021 out: 1022 put_cpu(); 1023 1024 n2_chunk_complete(req, NULL); 1025 return err; 1026 } 1027 1028 static int n2_encrypt_ecb(struct ablkcipher_request *req) 1029 { 1030 return n2_do_ecb(req, true); 1031 } 1032 1033 static int n2_decrypt_ecb(struct ablkcipher_request *req) 1034 { 1035 return n2_do_ecb(req, false); 1036 } 1037 1038 static int n2_do_chaining(struct ablkcipher_request *req, bool encrypt) 1039 { 1040 struct n2_request_context *rctx = ablkcipher_request_ctx(req); 1041 struct crypto_tfm *tfm = req->base.tfm; 1042 unsigned long flags, hv_ret, iv_paddr; 1043 int err = n2_compute_chunks(req); 1044 struct n2_crypto_chunk *c, *tmp; 1045 struct spu_queue *qp; 1046 void *final_iv_addr; 1047 1048 final_iv_addr = NULL; 1049 1050 if (err) 1051 return err; 1052 1053 qp = cpu_to_cwq[get_cpu()]; 1054 err = -ENODEV; 1055 if (!qp) 1056 goto out; 1057 1058 spin_lock_irqsave(&qp->lock, flags); 1059 1060 if (encrypt) { 1061 iv_paddr = __pa(rctx->walk.iv); 1062 list_for_each_entry_safe(c, tmp, &rctx->chunk_list, 1063 entry) { 1064 c->iv_paddr = iv_paddr; 1065 err = __n2_crypt_chunk(tfm, c, qp, true); 1066 if (err) 1067 break; 1068 iv_paddr = c->dest_final - rctx->walk.blocksize; 1069 list_del(&c->entry); 1070 if (unlikely(c != &rctx->chunk)) 1071 kfree(c); 1072 } 1073 final_iv_addr = __va(iv_paddr); 1074 } else { 1075 list_for_each_entry_safe_reverse(c, tmp, &rctx->chunk_list, 1076 entry) { 1077 if (c == &rctx->chunk) { 1078 iv_paddr = __pa(rctx->walk.iv); 1079 } else { 1080 iv_paddr = (tmp->arr[tmp->arr_len-1].src_paddr + 1081 tmp->arr[tmp->arr_len-1].src_len - 1082 rctx->walk.blocksize); 1083 } 1084 if (!final_iv_addr) { 1085 unsigned long pa; 1086 1087 pa = (c->arr[c->arr_len-1].src_paddr + 1088 c->arr[c->arr_len-1].src_len - 1089 rctx->walk.blocksize); 1090 final_iv_addr = rctx->temp_iv; 1091 memcpy(rctx->temp_iv, __va(pa), 1092 rctx->walk.blocksize); 1093 } 1094 c->iv_paddr = iv_paddr; 1095 err = __n2_crypt_chunk(tfm, c, qp, false); 1096 if (err) 1097 break; 1098 list_del(&c->entry); 1099 if (unlikely(c != &rctx->chunk)) 1100 kfree(c); 1101 } 1102 } 1103 if (!err) { 1104 hv_ret = wait_for_tail(qp); 1105 if (hv_ret != HV_EOK) 1106 err = -EINVAL; 1107 } 1108 1109 spin_unlock_irqrestore(&qp->lock, flags); 1110 1111 out: 1112 put_cpu(); 1113 1114 n2_chunk_complete(req, err ? NULL : final_iv_addr); 1115 return err; 1116 } 1117 1118 static int n2_encrypt_chaining(struct ablkcipher_request *req) 1119 { 1120 return n2_do_chaining(req, true); 1121 } 1122 1123 static int n2_decrypt_chaining(struct ablkcipher_request *req) 1124 { 1125 return n2_do_chaining(req, false); 1126 } 1127 1128 struct n2_cipher_tmpl { 1129 const char *name; 1130 const char *drv_name; 1131 u8 block_size; 1132 u8 enc_type; 1133 struct ablkcipher_alg ablkcipher; 1134 }; 1135 1136 static const struct n2_cipher_tmpl cipher_tmpls[] = { 1137 /* ARC4: only ECB is supported (chaining bits ignored) */ 1138 { .name = "ecb(arc4)", 1139 .drv_name = "ecb-arc4", 1140 .block_size = 1, 1141 .enc_type = (ENC_TYPE_ALG_RC4_STREAM | 1142 ENC_TYPE_CHAINING_ECB), 1143 .ablkcipher = { 1144 .min_keysize = 1, 1145 .max_keysize = 256, 1146 .setkey = n2_arc4_setkey, 1147 .encrypt = n2_encrypt_ecb, 1148 .decrypt = n2_decrypt_ecb, 1149 }, 1150 }, 1151 1152 /* DES: ECB CBC and CFB are supported */ 1153 { .name = "ecb(des)", 1154 .drv_name = "ecb-des", 1155 .block_size = DES_BLOCK_SIZE, 1156 .enc_type = (ENC_TYPE_ALG_DES | 1157 ENC_TYPE_CHAINING_ECB), 1158 .ablkcipher = { 1159 .min_keysize = DES_KEY_SIZE, 1160 .max_keysize = DES_KEY_SIZE, 1161 .setkey = n2_des_setkey, 1162 .encrypt = n2_encrypt_ecb, 1163 .decrypt = n2_decrypt_ecb, 1164 }, 1165 }, 1166 { .name = "cbc(des)", 1167 .drv_name = "cbc-des", 1168 .block_size = DES_BLOCK_SIZE, 1169 .enc_type = (ENC_TYPE_ALG_DES | 1170 ENC_TYPE_CHAINING_CBC), 1171 .ablkcipher = { 1172 .ivsize = DES_BLOCK_SIZE, 1173 .min_keysize = DES_KEY_SIZE, 1174 .max_keysize = DES_KEY_SIZE, 1175 .setkey = n2_des_setkey, 1176 .encrypt = n2_encrypt_chaining, 1177 .decrypt = n2_decrypt_chaining, 1178 }, 1179 }, 1180 { .name = "cfb(des)", 1181 .drv_name = "cfb-des", 1182 .block_size = DES_BLOCK_SIZE, 1183 .enc_type = (ENC_TYPE_ALG_DES | 1184 ENC_TYPE_CHAINING_CFB), 1185 .ablkcipher = { 1186 .min_keysize = DES_KEY_SIZE, 1187 .max_keysize = DES_KEY_SIZE, 1188 .setkey = n2_des_setkey, 1189 .encrypt = n2_encrypt_chaining, 1190 .decrypt = n2_decrypt_chaining, 1191 }, 1192 }, 1193 1194 /* 3DES: ECB CBC and CFB are supported */ 1195 { .name = "ecb(des3_ede)", 1196 .drv_name = "ecb-3des", 1197 .block_size = DES_BLOCK_SIZE, 1198 .enc_type = (ENC_TYPE_ALG_3DES | 1199 ENC_TYPE_CHAINING_ECB), 1200 .ablkcipher = { 1201 .min_keysize = 3 * DES_KEY_SIZE, 1202 .max_keysize = 3 * DES_KEY_SIZE, 1203 .setkey = n2_3des_setkey, 1204 .encrypt = n2_encrypt_ecb, 1205 .decrypt = n2_decrypt_ecb, 1206 }, 1207 }, 1208 { .name = "cbc(des3_ede)", 1209 .drv_name = "cbc-3des", 1210 .block_size = DES_BLOCK_SIZE, 1211 .enc_type = (ENC_TYPE_ALG_3DES | 1212 ENC_TYPE_CHAINING_CBC), 1213 .ablkcipher = { 1214 .ivsize = DES_BLOCK_SIZE, 1215 .min_keysize = 3 * DES_KEY_SIZE, 1216 .max_keysize = 3 * DES_KEY_SIZE, 1217 .setkey = n2_3des_setkey, 1218 .encrypt = n2_encrypt_chaining, 1219 .decrypt = n2_decrypt_chaining, 1220 }, 1221 }, 1222 { .name = "cfb(des3_ede)", 1223 .drv_name = "cfb-3des", 1224 .block_size = DES_BLOCK_SIZE, 1225 .enc_type = (ENC_TYPE_ALG_3DES | 1226 ENC_TYPE_CHAINING_CFB), 1227 .ablkcipher = { 1228 .min_keysize = 3 * DES_KEY_SIZE, 1229 .max_keysize = 3 * DES_KEY_SIZE, 1230 .setkey = n2_3des_setkey, 1231 .encrypt = n2_encrypt_chaining, 1232 .decrypt = n2_decrypt_chaining, 1233 }, 1234 }, 1235 /* AES: ECB CBC and CTR are supported */ 1236 { .name = "ecb(aes)", 1237 .drv_name = "ecb-aes", 1238 .block_size = AES_BLOCK_SIZE, 1239 .enc_type = (ENC_TYPE_ALG_AES128 | 1240 ENC_TYPE_CHAINING_ECB), 1241 .ablkcipher = { 1242 .min_keysize = AES_MIN_KEY_SIZE, 1243 .max_keysize = AES_MAX_KEY_SIZE, 1244 .setkey = n2_aes_setkey, 1245 .encrypt = n2_encrypt_ecb, 1246 .decrypt = n2_decrypt_ecb, 1247 }, 1248 }, 1249 { .name = "cbc(aes)", 1250 .drv_name = "cbc-aes", 1251 .block_size = AES_BLOCK_SIZE, 1252 .enc_type = (ENC_TYPE_ALG_AES128 | 1253 ENC_TYPE_CHAINING_CBC), 1254 .ablkcipher = { 1255 .ivsize = AES_BLOCK_SIZE, 1256 .min_keysize = AES_MIN_KEY_SIZE, 1257 .max_keysize = AES_MAX_KEY_SIZE, 1258 .setkey = n2_aes_setkey, 1259 .encrypt = n2_encrypt_chaining, 1260 .decrypt = n2_decrypt_chaining, 1261 }, 1262 }, 1263 { .name = "ctr(aes)", 1264 .drv_name = "ctr-aes", 1265 .block_size = AES_BLOCK_SIZE, 1266 .enc_type = (ENC_TYPE_ALG_AES128 | 1267 ENC_TYPE_CHAINING_COUNTER), 1268 .ablkcipher = { 1269 .ivsize = AES_BLOCK_SIZE, 1270 .min_keysize = AES_MIN_KEY_SIZE, 1271 .max_keysize = AES_MAX_KEY_SIZE, 1272 .setkey = n2_aes_setkey, 1273 .encrypt = n2_encrypt_chaining, 1274 .decrypt = n2_encrypt_chaining, 1275 }, 1276 }, 1277 1278 }; 1279 #define NUM_CIPHER_TMPLS ARRAY_SIZE(cipher_tmpls) 1280 1281 static LIST_HEAD(cipher_algs); 1282 1283 struct n2_hash_tmpl { 1284 const char *name; 1285 const u8 *hash_zero; 1286 const u32 *hash_init; 1287 u8 hw_op_hashsz; 1288 u8 digest_size; 1289 u8 block_size; 1290 u8 auth_type; 1291 u8 hmac_type; 1292 }; 1293 1294 static const u32 md5_init[MD5_HASH_WORDS] = { 1295 cpu_to_le32(MD5_H0), 1296 cpu_to_le32(MD5_H1), 1297 cpu_to_le32(MD5_H2), 1298 cpu_to_le32(MD5_H3), 1299 }; 1300 static const u32 sha1_init[SHA1_DIGEST_SIZE / 4] = { 1301 SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4, 1302 }; 1303 static const u32 sha256_init[SHA256_DIGEST_SIZE / 4] = { 1304 SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3, 1305 SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7, 1306 }; 1307 static const u32 sha224_init[SHA256_DIGEST_SIZE / 4] = { 1308 SHA224_H0, SHA224_H1, SHA224_H2, SHA224_H3, 1309 SHA224_H4, SHA224_H5, SHA224_H6, SHA224_H7, 1310 }; 1311 1312 static const struct n2_hash_tmpl hash_tmpls[] = { 1313 { .name = "md5", 1314 .hash_zero = md5_zero_message_hash, 1315 .hash_init = md5_init, 1316 .auth_type = AUTH_TYPE_MD5, 1317 .hmac_type = AUTH_TYPE_HMAC_MD5, 1318 .hw_op_hashsz = MD5_DIGEST_SIZE, 1319 .digest_size = MD5_DIGEST_SIZE, 1320 .block_size = MD5_HMAC_BLOCK_SIZE }, 1321 { .name = "sha1", 1322 .hash_zero = sha1_zero_message_hash, 1323 .hash_init = sha1_init, 1324 .auth_type = AUTH_TYPE_SHA1, 1325 .hmac_type = AUTH_TYPE_HMAC_SHA1, 1326 .hw_op_hashsz = SHA1_DIGEST_SIZE, 1327 .digest_size = SHA1_DIGEST_SIZE, 1328 .block_size = SHA1_BLOCK_SIZE }, 1329 { .name = "sha256", 1330 .hash_zero = sha256_zero_message_hash, 1331 .hash_init = sha256_init, 1332 .auth_type = AUTH_TYPE_SHA256, 1333 .hmac_type = AUTH_TYPE_HMAC_SHA256, 1334 .hw_op_hashsz = SHA256_DIGEST_SIZE, 1335 .digest_size = SHA256_DIGEST_SIZE, 1336 .block_size = SHA256_BLOCK_SIZE }, 1337 { .name = "sha224", 1338 .hash_zero = sha224_zero_message_hash, 1339 .hash_init = sha224_init, 1340 .auth_type = AUTH_TYPE_SHA256, 1341 .hmac_type = AUTH_TYPE_RESERVED, 1342 .hw_op_hashsz = SHA256_DIGEST_SIZE, 1343 .digest_size = SHA224_DIGEST_SIZE, 1344 .block_size = SHA224_BLOCK_SIZE }, 1345 }; 1346 #define NUM_HASH_TMPLS ARRAY_SIZE(hash_tmpls) 1347 1348 static LIST_HEAD(ahash_algs); 1349 static LIST_HEAD(hmac_algs); 1350 1351 static int algs_registered; 1352 1353 static void __n2_unregister_algs(void) 1354 { 1355 struct n2_cipher_alg *cipher, *cipher_tmp; 1356 struct n2_ahash_alg *alg, *alg_tmp; 1357 struct n2_hmac_alg *hmac, *hmac_tmp; 1358 1359 list_for_each_entry_safe(cipher, cipher_tmp, &cipher_algs, entry) { 1360 crypto_unregister_alg(&cipher->alg); 1361 list_del(&cipher->entry); 1362 kfree(cipher); 1363 } 1364 list_for_each_entry_safe(hmac, hmac_tmp, &hmac_algs, derived.entry) { 1365 crypto_unregister_ahash(&hmac->derived.alg); 1366 list_del(&hmac->derived.entry); 1367 kfree(hmac); 1368 } 1369 list_for_each_entry_safe(alg, alg_tmp, &ahash_algs, entry) { 1370 crypto_unregister_ahash(&alg->alg); 1371 list_del(&alg->entry); 1372 kfree(alg); 1373 } 1374 } 1375 1376 static int n2_cipher_cra_init(struct crypto_tfm *tfm) 1377 { 1378 tfm->crt_ablkcipher.reqsize = sizeof(struct n2_request_context); 1379 return 0; 1380 } 1381 1382 static int __n2_register_one_cipher(const struct n2_cipher_tmpl *tmpl) 1383 { 1384 struct n2_cipher_alg *p = kzalloc(sizeof(*p), GFP_KERNEL); 1385 struct crypto_alg *alg; 1386 int err; 1387 1388 if (!p) 1389 return -ENOMEM; 1390 1391 alg = &p->alg; 1392 1393 snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", tmpl->name); 1394 snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s-n2", tmpl->drv_name); 1395 alg->cra_priority = N2_CRA_PRIORITY; 1396 alg->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | 1397 CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC; 1398 alg->cra_blocksize = tmpl->block_size; 1399 p->enc_type = tmpl->enc_type; 1400 alg->cra_ctxsize = sizeof(struct n2_cipher_context); 1401 alg->cra_type = &crypto_ablkcipher_type; 1402 alg->cra_u.ablkcipher = tmpl->ablkcipher; 1403 alg->cra_init = n2_cipher_cra_init; 1404 alg->cra_module = THIS_MODULE; 1405 1406 list_add(&p->entry, &cipher_algs); 1407 err = crypto_register_alg(alg); 1408 if (err) { 1409 pr_err("%s alg registration failed\n", alg->cra_name); 1410 list_del(&p->entry); 1411 kfree(p); 1412 } else { 1413 pr_info("%s alg registered\n", alg->cra_name); 1414 } 1415 return err; 1416 } 1417 1418 static int __n2_register_one_hmac(struct n2_ahash_alg *n2ahash) 1419 { 1420 struct n2_hmac_alg *p = kzalloc(sizeof(*p), GFP_KERNEL); 1421 struct ahash_alg *ahash; 1422 struct crypto_alg *base; 1423 int err; 1424 1425 if (!p) 1426 return -ENOMEM; 1427 1428 p->child_alg = n2ahash->alg.halg.base.cra_name; 1429 memcpy(&p->derived, n2ahash, sizeof(struct n2_ahash_alg)); 1430 INIT_LIST_HEAD(&p->derived.entry); 1431 1432 ahash = &p->derived.alg; 1433 ahash->digest = n2_hmac_async_digest; 1434 ahash->setkey = n2_hmac_async_setkey; 1435 1436 base = &ahash->halg.base; 1437 snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", p->child_alg); 1438 snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "hmac-%s-n2", p->child_alg); 1439 1440 base->cra_ctxsize = sizeof(struct n2_hmac_ctx); 1441 base->cra_init = n2_hmac_cra_init; 1442 base->cra_exit = n2_hmac_cra_exit; 1443 1444 list_add(&p->derived.entry, &hmac_algs); 1445 err = crypto_register_ahash(ahash); 1446 if (err) { 1447 pr_err("%s alg registration failed\n", base->cra_name); 1448 list_del(&p->derived.entry); 1449 kfree(p); 1450 } else { 1451 pr_info("%s alg registered\n", base->cra_name); 1452 } 1453 return err; 1454 } 1455 1456 static int __n2_register_one_ahash(const struct n2_hash_tmpl *tmpl) 1457 { 1458 struct n2_ahash_alg *p = kzalloc(sizeof(*p), GFP_KERNEL); 1459 struct hash_alg_common *halg; 1460 struct crypto_alg *base; 1461 struct ahash_alg *ahash; 1462 int err; 1463 1464 if (!p) 1465 return -ENOMEM; 1466 1467 p->hash_zero = tmpl->hash_zero; 1468 p->hash_init = tmpl->hash_init; 1469 p->auth_type = tmpl->auth_type; 1470 p->hmac_type = tmpl->hmac_type; 1471 p->hw_op_hashsz = tmpl->hw_op_hashsz; 1472 p->digest_size = tmpl->digest_size; 1473 1474 ahash = &p->alg; 1475 ahash->init = n2_hash_async_init; 1476 ahash->update = n2_hash_async_update; 1477 ahash->final = n2_hash_async_final; 1478 ahash->finup = n2_hash_async_finup; 1479 ahash->digest = n2_hash_async_digest; 1480 ahash->export = n2_hash_async_noexport; 1481 ahash->import = n2_hash_async_noimport; 1482 1483 halg = &ahash->halg; 1484 halg->digestsize = tmpl->digest_size; 1485 1486 base = &halg->base; 1487 snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "%s", tmpl->name); 1488 snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s-n2", tmpl->name); 1489 base->cra_priority = N2_CRA_PRIORITY; 1490 base->cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | 1491 CRYPTO_ALG_NEED_FALLBACK; 1492 base->cra_blocksize = tmpl->block_size; 1493 base->cra_ctxsize = sizeof(struct n2_hash_ctx); 1494 base->cra_module = THIS_MODULE; 1495 base->cra_init = n2_hash_cra_init; 1496 base->cra_exit = n2_hash_cra_exit; 1497 1498 list_add(&p->entry, &ahash_algs); 1499 err = crypto_register_ahash(ahash); 1500 if (err) { 1501 pr_err("%s alg registration failed\n", base->cra_name); 1502 list_del(&p->entry); 1503 kfree(p); 1504 } else { 1505 pr_info("%s alg registered\n", base->cra_name); 1506 } 1507 if (!err && p->hmac_type != AUTH_TYPE_RESERVED) 1508 err = __n2_register_one_hmac(p); 1509 return err; 1510 } 1511 1512 static int n2_register_algs(void) 1513 { 1514 int i, err = 0; 1515 1516 mutex_lock(&spu_lock); 1517 if (algs_registered++) 1518 goto out; 1519 1520 for (i = 0; i < NUM_HASH_TMPLS; i++) { 1521 err = __n2_register_one_ahash(&hash_tmpls[i]); 1522 if (err) { 1523 __n2_unregister_algs(); 1524 goto out; 1525 } 1526 } 1527 for (i = 0; i < NUM_CIPHER_TMPLS; i++) { 1528 err = __n2_register_one_cipher(&cipher_tmpls[i]); 1529 if (err) { 1530 __n2_unregister_algs(); 1531 goto out; 1532 } 1533 } 1534 1535 out: 1536 mutex_unlock(&spu_lock); 1537 return err; 1538 } 1539 1540 static void n2_unregister_algs(void) 1541 { 1542 mutex_lock(&spu_lock); 1543 if (!--algs_registered) 1544 __n2_unregister_algs(); 1545 mutex_unlock(&spu_lock); 1546 } 1547 1548 /* To map CWQ queues to interrupt sources, the hypervisor API provides 1549 * a devino. This isn't very useful to us because all of the 1550 * interrupts listed in the device_node have been translated to 1551 * Linux virtual IRQ cookie numbers. 1552 * 1553 * So we have to back-translate, going through the 'intr' and 'ino' 1554 * property tables of the n2cp MDESC node, matching it with the OF 1555 * 'interrupts' property entries, in order to to figure out which 1556 * devino goes to which already-translated IRQ. 1557 */ 1558 static int find_devino_index(struct platform_device *dev, struct spu_mdesc_info *ip, 1559 unsigned long dev_ino) 1560 { 1561 const unsigned int *dev_intrs; 1562 unsigned int intr; 1563 int i; 1564 1565 for (i = 0; i < ip->num_intrs; i++) { 1566 if (ip->ino_table[i].ino == dev_ino) 1567 break; 1568 } 1569 if (i == ip->num_intrs) 1570 return -ENODEV; 1571 1572 intr = ip->ino_table[i].intr; 1573 1574 dev_intrs = of_get_property(dev->dev.of_node, "interrupts", NULL); 1575 if (!dev_intrs) 1576 return -ENODEV; 1577 1578 for (i = 0; i < dev->archdata.num_irqs; i++) { 1579 if (dev_intrs[i] == intr) 1580 return i; 1581 } 1582 1583 return -ENODEV; 1584 } 1585 1586 static int spu_map_ino(struct platform_device *dev, struct spu_mdesc_info *ip, 1587 const char *irq_name, struct spu_queue *p, 1588 irq_handler_t handler) 1589 { 1590 unsigned long herr; 1591 int index; 1592 1593 herr = sun4v_ncs_qhandle_to_devino(p->qhandle, &p->devino); 1594 if (herr) 1595 return -EINVAL; 1596 1597 index = find_devino_index(dev, ip, p->devino); 1598 if (index < 0) 1599 return index; 1600 1601 p->irq = dev->archdata.irqs[index]; 1602 1603 sprintf(p->irq_name, "%s-%d", irq_name, index); 1604 1605 return request_irq(p->irq, handler, 0, p->irq_name, p); 1606 } 1607 1608 static struct kmem_cache *queue_cache[2]; 1609 1610 static void *new_queue(unsigned long q_type) 1611 { 1612 return kmem_cache_zalloc(queue_cache[q_type - 1], GFP_KERNEL); 1613 } 1614 1615 static void free_queue(void *p, unsigned long q_type) 1616 { 1617 kmem_cache_free(queue_cache[q_type - 1], p); 1618 } 1619 1620 static int queue_cache_init(void) 1621 { 1622 if (!queue_cache[HV_NCS_QTYPE_MAU - 1]) 1623 queue_cache[HV_NCS_QTYPE_MAU - 1] = 1624 kmem_cache_create("mau_queue", 1625 (MAU_NUM_ENTRIES * 1626 MAU_ENTRY_SIZE), 1627 MAU_ENTRY_SIZE, 0, NULL); 1628 if (!queue_cache[HV_NCS_QTYPE_MAU - 1]) 1629 return -ENOMEM; 1630 1631 if (!queue_cache[HV_NCS_QTYPE_CWQ - 1]) 1632 queue_cache[HV_NCS_QTYPE_CWQ - 1] = 1633 kmem_cache_create("cwq_queue", 1634 (CWQ_NUM_ENTRIES * 1635 CWQ_ENTRY_SIZE), 1636 CWQ_ENTRY_SIZE, 0, NULL); 1637 if (!queue_cache[HV_NCS_QTYPE_CWQ - 1]) { 1638 kmem_cache_destroy(queue_cache[HV_NCS_QTYPE_MAU - 1]); 1639 queue_cache[HV_NCS_QTYPE_MAU - 1] = NULL; 1640 return -ENOMEM; 1641 } 1642 return 0; 1643 } 1644 1645 static void queue_cache_destroy(void) 1646 { 1647 kmem_cache_destroy(queue_cache[HV_NCS_QTYPE_MAU - 1]); 1648 kmem_cache_destroy(queue_cache[HV_NCS_QTYPE_CWQ - 1]); 1649 queue_cache[HV_NCS_QTYPE_MAU - 1] = NULL; 1650 queue_cache[HV_NCS_QTYPE_CWQ - 1] = NULL; 1651 } 1652 1653 static long spu_queue_register_workfn(void *arg) 1654 { 1655 struct spu_qreg *qr = arg; 1656 struct spu_queue *p = qr->queue; 1657 unsigned long q_type = qr->type; 1658 unsigned long hv_ret; 1659 1660 hv_ret = sun4v_ncs_qconf(q_type, __pa(p->q), 1661 CWQ_NUM_ENTRIES, &p->qhandle); 1662 if (!hv_ret) 1663 sun4v_ncs_sethead_marker(p->qhandle, 0); 1664 1665 return hv_ret ? -EINVAL : 0; 1666 } 1667 1668 static int spu_queue_register(struct spu_queue *p, unsigned long q_type) 1669 { 1670 int cpu = cpumask_any_and(&p->sharing, cpu_online_mask); 1671 struct spu_qreg qr = { .queue = p, .type = q_type }; 1672 1673 return work_on_cpu_safe(cpu, spu_queue_register_workfn, &qr); 1674 } 1675 1676 static int spu_queue_setup(struct spu_queue *p) 1677 { 1678 int err; 1679 1680 p->q = new_queue(p->q_type); 1681 if (!p->q) 1682 return -ENOMEM; 1683 1684 err = spu_queue_register(p, p->q_type); 1685 if (err) { 1686 free_queue(p->q, p->q_type); 1687 p->q = NULL; 1688 } 1689 1690 return err; 1691 } 1692 1693 static void spu_queue_destroy(struct spu_queue *p) 1694 { 1695 unsigned long hv_ret; 1696 1697 if (!p->q) 1698 return; 1699 1700 hv_ret = sun4v_ncs_qconf(p->q_type, p->qhandle, 0, &p->qhandle); 1701 1702 if (!hv_ret) 1703 free_queue(p->q, p->q_type); 1704 } 1705 1706 static void spu_list_destroy(struct list_head *list) 1707 { 1708 struct spu_queue *p, *n; 1709 1710 list_for_each_entry_safe(p, n, list, list) { 1711 int i; 1712 1713 for (i = 0; i < NR_CPUS; i++) { 1714 if (cpu_to_cwq[i] == p) 1715 cpu_to_cwq[i] = NULL; 1716 } 1717 1718 if (p->irq) { 1719 free_irq(p->irq, p); 1720 p->irq = 0; 1721 } 1722 spu_queue_destroy(p); 1723 list_del(&p->list); 1724 kfree(p); 1725 } 1726 } 1727 1728 /* Walk the backward arcs of a CWQ 'exec-unit' node, 1729 * gathering cpu membership information. 1730 */ 1731 static int spu_mdesc_walk_arcs(struct mdesc_handle *mdesc, 1732 struct platform_device *dev, 1733 u64 node, struct spu_queue *p, 1734 struct spu_queue **table) 1735 { 1736 u64 arc; 1737 1738 mdesc_for_each_arc(arc, mdesc, node, MDESC_ARC_TYPE_BACK) { 1739 u64 tgt = mdesc_arc_target(mdesc, arc); 1740 const char *name = mdesc_node_name(mdesc, tgt); 1741 const u64 *id; 1742 1743 if (strcmp(name, "cpu")) 1744 continue; 1745 id = mdesc_get_property(mdesc, tgt, "id", NULL); 1746 if (table[*id] != NULL) { 1747 dev_err(&dev->dev, "%pOF: SPU cpu slot already set.\n", 1748 dev->dev.of_node); 1749 return -EINVAL; 1750 } 1751 cpumask_set_cpu(*id, &p->sharing); 1752 table[*id] = p; 1753 } 1754 return 0; 1755 } 1756 1757 /* Process an 'exec-unit' MDESC node of type 'cwq'. */ 1758 static int handle_exec_unit(struct spu_mdesc_info *ip, struct list_head *list, 1759 struct platform_device *dev, struct mdesc_handle *mdesc, 1760 u64 node, const char *iname, unsigned long q_type, 1761 irq_handler_t handler, struct spu_queue **table) 1762 { 1763 struct spu_queue *p; 1764 int err; 1765 1766 p = kzalloc(sizeof(struct spu_queue), GFP_KERNEL); 1767 if (!p) { 1768 dev_err(&dev->dev, "%pOF: Could not allocate SPU queue.\n", 1769 dev->dev.of_node); 1770 return -ENOMEM; 1771 } 1772 1773 cpumask_clear(&p->sharing); 1774 spin_lock_init(&p->lock); 1775 p->q_type = q_type; 1776 INIT_LIST_HEAD(&p->jobs); 1777 list_add(&p->list, list); 1778 1779 err = spu_mdesc_walk_arcs(mdesc, dev, node, p, table); 1780 if (err) 1781 return err; 1782 1783 err = spu_queue_setup(p); 1784 if (err) 1785 return err; 1786 1787 return spu_map_ino(dev, ip, iname, p, handler); 1788 } 1789 1790 static int spu_mdesc_scan(struct mdesc_handle *mdesc, struct platform_device *dev, 1791 struct spu_mdesc_info *ip, struct list_head *list, 1792 const char *exec_name, unsigned long q_type, 1793 irq_handler_t handler, struct spu_queue **table) 1794 { 1795 int err = 0; 1796 u64 node; 1797 1798 mdesc_for_each_node_by_name(mdesc, node, "exec-unit") { 1799 const char *type; 1800 1801 type = mdesc_get_property(mdesc, node, "type", NULL); 1802 if (!type || strcmp(type, exec_name)) 1803 continue; 1804 1805 err = handle_exec_unit(ip, list, dev, mdesc, node, 1806 exec_name, q_type, handler, table); 1807 if (err) { 1808 spu_list_destroy(list); 1809 break; 1810 } 1811 } 1812 1813 return err; 1814 } 1815 1816 static int get_irq_props(struct mdesc_handle *mdesc, u64 node, 1817 struct spu_mdesc_info *ip) 1818 { 1819 const u64 *ino; 1820 int ino_len; 1821 int i; 1822 1823 ino = mdesc_get_property(mdesc, node, "ino", &ino_len); 1824 if (!ino) { 1825 printk("NO 'ino'\n"); 1826 return -ENODEV; 1827 } 1828 1829 ip->num_intrs = ino_len / sizeof(u64); 1830 ip->ino_table = kzalloc((sizeof(struct ino_blob) * 1831 ip->num_intrs), 1832 GFP_KERNEL); 1833 if (!ip->ino_table) 1834 return -ENOMEM; 1835 1836 for (i = 0; i < ip->num_intrs; i++) { 1837 struct ino_blob *b = &ip->ino_table[i]; 1838 b->intr = i + 1; 1839 b->ino = ino[i]; 1840 } 1841 1842 return 0; 1843 } 1844 1845 static int grab_mdesc_irq_props(struct mdesc_handle *mdesc, 1846 struct platform_device *dev, 1847 struct spu_mdesc_info *ip, 1848 const char *node_name) 1849 { 1850 const unsigned int *reg; 1851 u64 node; 1852 1853 reg = of_get_property(dev->dev.of_node, "reg", NULL); 1854 if (!reg) 1855 return -ENODEV; 1856 1857 mdesc_for_each_node_by_name(mdesc, node, "virtual-device") { 1858 const char *name; 1859 const u64 *chdl; 1860 1861 name = mdesc_get_property(mdesc, node, "name", NULL); 1862 if (!name || strcmp(name, node_name)) 1863 continue; 1864 chdl = mdesc_get_property(mdesc, node, "cfg-handle", NULL); 1865 if (!chdl || (*chdl != *reg)) 1866 continue; 1867 ip->cfg_handle = *chdl; 1868 return get_irq_props(mdesc, node, ip); 1869 } 1870 1871 return -ENODEV; 1872 } 1873 1874 static unsigned long n2_spu_hvapi_major; 1875 static unsigned long n2_spu_hvapi_minor; 1876 1877 static int n2_spu_hvapi_register(void) 1878 { 1879 int err; 1880 1881 n2_spu_hvapi_major = 2; 1882 n2_spu_hvapi_minor = 0; 1883 1884 err = sun4v_hvapi_register(HV_GRP_NCS, 1885 n2_spu_hvapi_major, 1886 &n2_spu_hvapi_minor); 1887 1888 if (!err) 1889 pr_info("Registered NCS HVAPI version %lu.%lu\n", 1890 n2_spu_hvapi_major, 1891 n2_spu_hvapi_minor); 1892 1893 return err; 1894 } 1895 1896 static void n2_spu_hvapi_unregister(void) 1897 { 1898 sun4v_hvapi_unregister(HV_GRP_NCS); 1899 } 1900 1901 static int global_ref; 1902 1903 static int grab_global_resources(void) 1904 { 1905 int err = 0; 1906 1907 mutex_lock(&spu_lock); 1908 1909 if (global_ref++) 1910 goto out; 1911 1912 err = n2_spu_hvapi_register(); 1913 if (err) 1914 goto out; 1915 1916 err = queue_cache_init(); 1917 if (err) 1918 goto out_hvapi_release; 1919 1920 err = -ENOMEM; 1921 cpu_to_cwq = kcalloc(NR_CPUS, sizeof(struct spu_queue *), 1922 GFP_KERNEL); 1923 if (!cpu_to_cwq) 1924 goto out_queue_cache_destroy; 1925 1926 cpu_to_mau = kcalloc(NR_CPUS, sizeof(struct spu_queue *), 1927 GFP_KERNEL); 1928 if (!cpu_to_mau) 1929 goto out_free_cwq_table; 1930 1931 err = 0; 1932 1933 out: 1934 if (err) 1935 global_ref--; 1936 mutex_unlock(&spu_lock); 1937 return err; 1938 1939 out_free_cwq_table: 1940 kfree(cpu_to_cwq); 1941 cpu_to_cwq = NULL; 1942 1943 out_queue_cache_destroy: 1944 queue_cache_destroy(); 1945 1946 out_hvapi_release: 1947 n2_spu_hvapi_unregister(); 1948 goto out; 1949 } 1950 1951 static void release_global_resources(void) 1952 { 1953 mutex_lock(&spu_lock); 1954 if (!--global_ref) { 1955 kfree(cpu_to_cwq); 1956 cpu_to_cwq = NULL; 1957 1958 kfree(cpu_to_mau); 1959 cpu_to_mau = NULL; 1960 1961 queue_cache_destroy(); 1962 n2_spu_hvapi_unregister(); 1963 } 1964 mutex_unlock(&spu_lock); 1965 } 1966 1967 static struct n2_crypto *alloc_n2cp(void) 1968 { 1969 struct n2_crypto *np = kzalloc(sizeof(struct n2_crypto), GFP_KERNEL); 1970 1971 if (np) 1972 INIT_LIST_HEAD(&np->cwq_list); 1973 1974 return np; 1975 } 1976 1977 static void free_n2cp(struct n2_crypto *np) 1978 { 1979 kfree(np->cwq_info.ino_table); 1980 np->cwq_info.ino_table = NULL; 1981 1982 kfree(np); 1983 } 1984 1985 static void n2_spu_driver_version(void) 1986 { 1987 static int n2_spu_version_printed; 1988 1989 if (n2_spu_version_printed++ == 0) 1990 pr_info("%s", version); 1991 } 1992 1993 static int n2_crypto_probe(struct platform_device *dev) 1994 { 1995 struct mdesc_handle *mdesc; 1996 struct n2_crypto *np; 1997 int err; 1998 1999 n2_spu_driver_version(); 2000 2001 pr_info("Found N2CP at %pOF\n", dev->dev.of_node); 2002 2003 np = alloc_n2cp(); 2004 if (!np) { 2005 dev_err(&dev->dev, "%pOF: Unable to allocate n2cp.\n", 2006 dev->dev.of_node); 2007 return -ENOMEM; 2008 } 2009 2010 err = grab_global_resources(); 2011 if (err) { 2012 dev_err(&dev->dev, "%pOF: Unable to grab global resources.\n", 2013 dev->dev.of_node); 2014 goto out_free_n2cp; 2015 } 2016 2017 mdesc = mdesc_grab(); 2018 2019 if (!mdesc) { 2020 dev_err(&dev->dev, "%pOF: Unable to grab MDESC.\n", 2021 dev->dev.of_node); 2022 err = -ENODEV; 2023 goto out_free_global; 2024 } 2025 err = grab_mdesc_irq_props(mdesc, dev, &np->cwq_info, "n2cp"); 2026 if (err) { 2027 dev_err(&dev->dev, "%pOF: Unable to grab IRQ props.\n", 2028 dev->dev.of_node); 2029 mdesc_release(mdesc); 2030 goto out_free_global; 2031 } 2032 2033 err = spu_mdesc_scan(mdesc, dev, &np->cwq_info, &np->cwq_list, 2034 "cwq", HV_NCS_QTYPE_CWQ, cwq_intr, 2035 cpu_to_cwq); 2036 mdesc_release(mdesc); 2037 2038 if (err) { 2039 dev_err(&dev->dev, "%pOF: CWQ MDESC scan failed.\n", 2040 dev->dev.of_node); 2041 goto out_free_global; 2042 } 2043 2044 err = n2_register_algs(); 2045 if (err) { 2046 dev_err(&dev->dev, "%pOF: Unable to register algorithms.\n", 2047 dev->dev.of_node); 2048 goto out_free_spu_list; 2049 } 2050 2051 dev_set_drvdata(&dev->dev, np); 2052 2053 return 0; 2054 2055 out_free_spu_list: 2056 spu_list_destroy(&np->cwq_list); 2057 2058 out_free_global: 2059 release_global_resources(); 2060 2061 out_free_n2cp: 2062 free_n2cp(np); 2063 2064 return err; 2065 } 2066 2067 static int n2_crypto_remove(struct platform_device *dev) 2068 { 2069 struct n2_crypto *np = dev_get_drvdata(&dev->dev); 2070 2071 n2_unregister_algs(); 2072 2073 spu_list_destroy(&np->cwq_list); 2074 2075 release_global_resources(); 2076 2077 free_n2cp(np); 2078 2079 return 0; 2080 } 2081 2082 static struct n2_mau *alloc_ncp(void) 2083 { 2084 struct n2_mau *mp = kzalloc(sizeof(struct n2_mau), GFP_KERNEL); 2085 2086 if (mp) 2087 INIT_LIST_HEAD(&mp->mau_list); 2088 2089 return mp; 2090 } 2091 2092 static void free_ncp(struct n2_mau *mp) 2093 { 2094 kfree(mp->mau_info.ino_table); 2095 mp->mau_info.ino_table = NULL; 2096 2097 kfree(mp); 2098 } 2099 2100 static int n2_mau_probe(struct platform_device *dev) 2101 { 2102 struct mdesc_handle *mdesc; 2103 struct n2_mau *mp; 2104 int err; 2105 2106 n2_spu_driver_version(); 2107 2108 pr_info("Found NCP at %pOF\n", dev->dev.of_node); 2109 2110 mp = alloc_ncp(); 2111 if (!mp) { 2112 dev_err(&dev->dev, "%pOF: Unable to allocate ncp.\n", 2113 dev->dev.of_node); 2114 return -ENOMEM; 2115 } 2116 2117 err = grab_global_resources(); 2118 if (err) { 2119 dev_err(&dev->dev, "%pOF: Unable to grab global resources.\n", 2120 dev->dev.of_node); 2121 goto out_free_ncp; 2122 } 2123 2124 mdesc = mdesc_grab(); 2125 2126 if (!mdesc) { 2127 dev_err(&dev->dev, "%pOF: Unable to grab MDESC.\n", 2128 dev->dev.of_node); 2129 err = -ENODEV; 2130 goto out_free_global; 2131 } 2132 2133 err = grab_mdesc_irq_props(mdesc, dev, &mp->mau_info, "ncp"); 2134 if (err) { 2135 dev_err(&dev->dev, "%pOF: Unable to grab IRQ props.\n", 2136 dev->dev.of_node); 2137 mdesc_release(mdesc); 2138 goto out_free_global; 2139 } 2140 2141 err = spu_mdesc_scan(mdesc, dev, &mp->mau_info, &mp->mau_list, 2142 "mau", HV_NCS_QTYPE_MAU, mau_intr, 2143 cpu_to_mau); 2144 mdesc_release(mdesc); 2145 2146 if (err) { 2147 dev_err(&dev->dev, "%pOF: MAU MDESC scan failed.\n", 2148 dev->dev.of_node); 2149 goto out_free_global; 2150 } 2151 2152 dev_set_drvdata(&dev->dev, mp); 2153 2154 return 0; 2155 2156 out_free_global: 2157 release_global_resources(); 2158 2159 out_free_ncp: 2160 free_ncp(mp); 2161 2162 return err; 2163 } 2164 2165 static int n2_mau_remove(struct platform_device *dev) 2166 { 2167 struct n2_mau *mp = dev_get_drvdata(&dev->dev); 2168 2169 spu_list_destroy(&mp->mau_list); 2170 2171 release_global_resources(); 2172 2173 free_ncp(mp); 2174 2175 return 0; 2176 } 2177 2178 static const struct of_device_id n2_crypto_match[] = { 2179 { 2180 .name = "n2cp", 2181 .compatible = "SUNW,n2-cwq", 2182 }, 2183 { 2184 .name = "n2cp", 2185 .compatible = "SUNW,vf-cwq", 2186 }, 2187 { 2188 .name = "n2cp", 2189 .compatible = "SUNW,kt-cwq", 2190 }, 2191 {}, 2192 }; 2193 2194 MODULE_DEVICE_TABLE(of, n2_crypto_match); 2195 2196 static struct platform_driver n2_crypto_driver = { 2197 .driver = { 2198 .name = "n2cp", 2199 .of_match_table = n2_crypto_match, 2200 }, 2201 .probe = n2_crypto_probe, 2202 .remove = n2_crypto_remove, 2203 }; 2204 2205 static const struct of_device_id n2_mau_match[] = { 2206 { 2207 .name = "ncp", 2208 .compatible = "SUNW,n2-mau", 2209 }, 2210 { 2211 .name = "ncp", 2212 .compatible = "SUNW,vf-mau", 2213 }, 2214 { 2215 .name = "ncp", 2216 .compatible = "SUNW,kt-mau", 2217 }, 2218 {}, 2219 }; 2220 2221 MODULE_DEVICE_TABLE(of, n2_mau_match); 2222 2223 static struct platform_driver n2_mau_driver = { 2224 .driver = { 2225 .name = "ncp", 2226 .of_match_table = n2_mau_match, 2227 }, 2228 .probe = n2_mau_probe, 2229 .remove = n2_mau_remove, 2230 }; 2231 2232 static struct platform_driver * const drivers[] = { 2233 &n2_crypto_driver, 2234 &n2_mau_driver, 2235 }; 2236 2237 static int __init n2_init(void) 2238 { 2239 return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); 2240 } 2241 2242 static void __exit n2_exit(void) 2243 { 2244 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); 2245 } 2246 2247 module_init(n2_init); 2248 module_exit(n2_exit); 2249