cesa.c revision 298955
1/*- 2 * Copyright (C) 2009-2011 Semihalf. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27/* 28 * CESA SRAM Memory Map: 29 * 30 * +------------------------+ <= sc->sc_sram_base + CESA_SRAM_SIZE 31 * | | 32 * | DATA | 33 * | | 34 * +------------------------+ <= sc->sc_sram_base + CESA_DATA(0) 35 * | struct cesa_sa_data | 36 * +------------------------+ 37 * | struct cesa_sa_hdesc | 38 * +------------------------+ <= sc->sc_sram_base 39 */ 40 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD: head/sys/dev/cesa/cesa.c 298955 2016-05-03 03:41:25Z pfg $"); 43 44#include <sys/param.h> 45#include <sys/systm.h> 46#include <sys/bus.h> 47#include <sys/endian.h> 48#include <sys/kernel.h> 49#include <sys/lock.h> 50#include <sys/mbuf.h> 51#include <sys/module.h> 52#include <sys/mutex.h> 53#include <sys/rman.h> 54 55#include <machine/bus.h> 56#include <machine/intr.h> 57#include <machine/resource.h> 58 59#include <dev/fdt/fdt_common.h> 60#include <dev/ofw/ofw_bus.h> 61#include <dev/ofw/ofw_bus_subr.h> 62 63#include <sys/md5.h> 64#include <crypto/sha1.h> 65#include <crypto/rijndael/rijndael.h> 66#include <opencrypto/cryptodev.h> 67#include "cryptodev_if.h" 68 69#include <arm/mv/mvreg.h> 70#include <arm/mv/mvwin.h> 71#include <arm/mv/mvvar.h> 72#include "cesa.h" 73 74static int cesa_probe(device_t); 75static int cesa_attach(device_t); 76static int cesa_detach(device_t); 77static void cesa_intr(void *); 78static int cesa_newsession(device_t, u_int32_t *, struct cryptoini *); 79static int cesa_freesession(device_t, u_int64_t); 80static int cesa_process(device_t, struct cryptop *, int); 81static int decode_win_cesa_setup(struct cesa_softc *sc); 82 83static struct resource_spec cesa_res_spec[] = { 84 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 85 { SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE }, 86 { -1, 0 } 87}; 88 89static device_method_t cesa_methods[] = { 90 /* Device interface */ 91 DEVMETHOD(device_probe, cesa_probe), 92 DEVMETHOD(device_attach, cesa_attach), 93 DEVMETHOD(device_detach, cesa_detach), 94 95 /* Crypto device methods */ 96 DEVMETHOD(cryptodev_newsession, cesa_newsession), 97 DEVMETHOD(cryptodev_freesession,cesa_freesession), 98 DEVMETHOD(cryptodev_process, cesa_process), 99 100 DEVMETHOD_END 101}; 102 103static driver_t cesa_driver = { 104 "cesa", 105 cesa_methods, 106 sizeof (struct cesa_softc) 107}; 108static devclass_t cesa_devclass; 109 110DRIVER_MODULE(cesa, simplebus, cesa_driver, cesa_devclass, 0, 0); 111MODULE_DEPEND(cesa, crypto, 1, 1, 1); 112 113static void 114cesa_dump_cshd(struct cesa_softc *sc, struct cesa_sa_hdesc *cshd) 115{ 116#ifdef DEBUG 117 device_t dev; 118 119 dev = sc->sc_dev; 120 device_printf(dev, "CESA SA Hardware Descriptor:\n"); 121 device_printf(dev, "\t\tconfig: 0x%08X\n", cshd->cshd_config); 122 device_printf(dev, "\t\te_src: 0x%08X\n", cshd->cshd_enc_src); 123 device_printf(dev, "\t\te_dst: 0x%08X\n", cshd->cshd_enc_dst); 124 device_printf(dev, "\t\te_dlen: 0x%08X\n", cshd->cshd_enc_dlen); 125 device_printf(dev, "\t\te_key: 0x%08X\n", cshd->cshd_enc_key); 126 device_printf(dev, "\t\te_iv_1: 0x%08X\n", cshd->cshd_enc_iv); 127 device_printf(dev, "\t\te_iv_2: 0x%08X\n", cshd->cshd_enc_iv_buf); 128 device_printf(dev, "\t\tm_src: 0x%08X\n", cshd->cshd_mac_src); 129 device_printf(dev, "\t\tm_dst: 0x%08X\n", cshd->cshd_mac_dst); 130 device_printf(dev, "\t\tm_dlen: 0x%08X\n", cshd->cshd_mac_dlen); 131 device_printf(dev, "\t\tm_tlen: 0x%08X\n", cshd->cshd_mac_total_dlen); 132 device_printf(dev, "\t\tm_iv_i: 0x%08X\n", cshd->cshd_mac_iv_in); 133 device_printf(dev, "\t\tm_iv_o: 0x%08X\n", cshd->cshd_mac_iv_out); 134#endif 135} 136 137static void 138cesa_alloc_dma_mem_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 139{ 140 struct cesa_dma_mem *cdm; 141 142 if (error) 143 return; 144 145 KASSERT(nseg == 1, ("Got wrong number of DMA segments, should be 1.")); 146 cdm = arg; 147 cdm->cdm_paddr = segs->ds_addr; 148} 149 150static int 151cesa_alloc_dma_mem(struct cesa_softc *sc, struct cesa_dma_mem *cdm, 152 bus_size_t size) 153{ 154 int error; 155 156 KASSERT(cdm->cdm_vaddr == NULL, 157 ("%s(): DMA memory descriptor in use.", __func__)); 158 159 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), /* parent */ 160 PAGE_SIZE, 0, /* alignment, boundary */ 161 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 162 BUS_SPACE_MAXADDR, /* highaddr */ 163 NULL, NULL, /* filtfunc, filtfuncarg */ 164 size, 1, /* maxsize, nsegments */ 165 size, 0, /* maxsegsz, flags */ 166 NULL, NULL, /* lockfunc, lockfuncarg */ 167 &cdm->cdm_tag); /* dmat */ 168 if (error) { 169 device_printf(sc->sc_dev, "failed to allocate busdma tag, error" 170 " %i!\n", error); 171 172 goto err1; 173 } 174 175 error = bus_dmamem_alloc(cdm->cdm_tag, &cdm->cdm_vaddr, 176 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &cdm->cdm_map); 177 if (error) { 178 device_printf(sc->sc_dev, "failed to allocate DMA safe" 179 " memory, error %i!\n", error); 180 181 goto err2; 182 } 183 184 error = bus_dmamap_load(cdm->cdm_tag, cdm->cdm_map, cdm->cdm_vaddr, 185 size, cesa_alloc_dma_mem_cb, cdm, BUS_DMA_NOWAIT); 186 if (error) { 187 device_printf(sc->sc_dev, "cannot get address of the DMA" 188 " memory, error %i\n", error); 189 190 goto err3; 191 } 192 193 return (0); 194err3: 195 bus_dmamem_free(cdm->cdm_tag, cdm->cdm_vaddr, cdm->cdm_map); 196err2: 197 bus_dma_tag_destroy(cdm->cdm_tag); 198err1: 199 cdm->cdm_vaddr = NULL; 200 return (error); 201} 202 203static void 204cesa_free_dma_mem(struct cesa_dma_mem *cdm) 205{ 206 207 bus_dmamap_unload(cdm->cdm_tag, cdm->cdm_map); 208 bus_dmamem_free(cdm->cdm_tag, cdm->cdm_vaddr, cdm->cdm_map); 209 bus_dma_tag_destroy(cdm->cdm_tag); 210 cdm->cdm_vaddr = NULL; 211} 212 213static void 214cesa_sync_dma_mem(struct cesa_dma_mem *cdm, bus_dmasync_op_t op) 215{ 216 217 /* Sync only if dma memory is valid */ 218 if (cdm->cdm_vaddr != NULL) 219 bus_dmamap_sync(cdm->cdm_tag, cdm->cdm_map, op); 220} 221 222static void 223cesa_sync_desc(struct cesa_softc *sc, bus_dmasync_op_t op) 224{ 225 226 cesa_sync_dma_mem(&sc->sc_tdesc_cdm, op); 227 cesa_sync_dma_mem(&sc->sc_sdesc_cdm, op); 228 cesa_sync_dma_mem(&sc->sc_requests_cdm, op); 229} 230 231static struct cesa_session * 232cesa_alloc_session(struct cesa_softc *sc) 233{ 234 struct cesa_session *cs; 235 236 CESA_GENERIC_ALLOC_LOCKED(sc, cs, sessions); 237 238 return (cs); 239} 240 241static struct cesa_session * 242cesa_get_session(struct cesa_softc *sc, uint32_t sid) 243{ 244 245 if (sid >= CESA_SESSIONS) 246 return (NULL); 247 248 return (&sc->sc_sessions[sid]); 249} 250 251static void 252cesa_free_session(struct cesa_softc *sc, struct cesa_session *cs) 253{ 254 255 CESA_GENERIC_FREE_LOCKED(sc, cs, sessions); 256} 257 258static struct cesa_request * 259cesa_alloc_request(struct cesa_softc *sc) 260{ 261 struct cesa_request *cr; 262 263 CESA_GENERIC_ALLOC_LOCKED(sc, cr, requests); 264 if (!cr) 265 return (NULL); 266 267 STAILQ_INIT(&cr->cr_tdesc); 268 STAILQ_INIT(&cr->cr_sdesc); 269 270 return (cr); 271} 272 273static void 274cesa_free_request(struct cesa_softc *sc, struct cesa_request *cr) 275{ 276 277 /* Free TDMA descriptors assigned to this request */ 278 CESA_LOCK(sc, tdesc); 279 STAILQ_CONCAT(&sc->sc_free_tdesc, &cr->cr_tdesc); 280 CESA_UNLOCK(sc, tdesc); 281 282 /* Free SA descriptors assigned to this request */ 283 CESA_LOCK(sc, sdesc); 284 STAILQ_CONCAT(&sc->sc_free_sdesc, &cr->cr_sdesc); 285 CESA_UNLOCK(sc, sdesc); 286 287 /* Unload DMA memory associated with request */ 288 if (cr->cr_dmap_loaded) { 289 bus_dmamap_unload(sc->sc_data_dtag, cr->cr_dmap); 290 cr->cr_dmap_loaded = 0; 291 } 292 293 CESA_GENERIC_FREE_LOCKED(sc, cr, requests); 294} 295 296static void 297cesa_enqueue_request(struct cesa_softc *sc, struct cesa_request *cr) 298{ 299 300 CESA_LOCK(sc, requests); 301 STAILQ_INSERT_TAIL(&sc->sc_ready_requests, cr, cr_stq); 302 CESA_UNLOCK(sc, requests); 303} 304 305static struct cesa_tdma_desc * 306cesa_alloc_tdesc(struct cesa_softc *sc) 307{ 308 struct cesa_tdma_desc *ctd; 309 310 CESA_GENERIC_ALLOC_LOCKED(sc, ctd, tdesc); 311 312 if (!ctd) 313 device_printf(sc->sc_dev, "TDMA descriptors pool exhaused. " 314 "Consider increasing CESA_TDMA_DESCRIPTORS.\n"); 315 316 return (ctd); 317} 318 319static struct cesa_sa_desc * 320cesa_alloc_sdesc(struct cesa_softc *sc, struct cesa_request *cr) 321{ 322 struct cesa_sa_desc *csd; 323 324 CESA_GENERIC_ALLOC_LOCKED(sc, csd, sdesc); 325 if (!csd) { 326 device_printf(sc->sc_dev, "SA descriptors pool exhaused. " 327 "Consider increasing CESA_SA_DESCRIPTORS.\n"); 328 return (NULL); 329 } 330 331 STAILQ_INSERT_TAIL(&cr->cr_sdesc, csd, csd_stq); 332 333 /* Fill-in SA descriptor with default values */ 334 csd->csd_cshd->cshd_enc_key = CESA_SA_DATA(csd_key); 335 csd->csd_cshd->cshd_enc_iv = CESA_SA_DATA(csd_iv); 336 csd->csd_cshd->cshd_enc_iv_buf = CESA_SA_DATA(csd_iv); 337 csd->csd_cshd->cshd_enc_src = 0; 338 csd->csd_cshd->cshd_enc_dst = 0; 339 csd->csd_cshd->cshd_enc_dlen = 0; 340 csd->csd_cshd->cshd_mac_dst = CESA_SA_DATA(csd_hash); 341 csd->csd_cshd->cshd_mac_iv_in = CESA_SA_DATA(csd_hiv_in); 342 csd->csd_cshd->cshd_mac_iv_out = CESA_SA_DATA(csd_hiv_out); 343 csd->csd_cshd->cshd_mac_src = 0; 344 csd->csd_cshd->cshd_mac_dlen = 0; 345 346 return (csd); 347} 348 349static struct cesa_tdma_desc * 350cesa_tdma_copy(struct cesa_softc *sc, bus_addr_t dst, bus_addr_t src, 351 bus_size_t size) 352{ 353 struct cesa_tdma_desc *ctd; 354 355 ctd = cesa_alloc_tdesc(sc); 356 if (!ctd) 357 return (NULL); 358 359 ctd->ctd_cthd->cthd_dst = dst; 360 ctd->ctd_cthd->cthd_src = src; 361 ctd->ctd_cthd->cthd_byte_count = size; 362 363 /* Handle special control packet */ 364 if (size != 0) 365 ctd->ctd_cthd->cthd_flags = CESA_CTHD_OWNED; 366 else 367 ctd->ctd_cthd->cthd_flags = 0; 368 369 return (ctd); 370} 371 372static struct cesa_tdma_desc * 373cesa_tdma_copyin_sa_data(struct cesa_softc *sc, struct cesa_request *cr) 374{ 375 376 return (cesa_tdma_copy(sc, sc->sc_sram_base + 377 sizeof(struct cesa_sa_hdesc), cr->cr_csd_paddr, 378 sizeof(struct cesa_sa_data))); 379} 380 381static struct cesa_tdma_desc * 382cesa_tdma_copyout_sa_data(struct cesa_softc *sc, struct cesa_request *cr) 383{ 384 385 return (cesa_tdma_copy(sc, cr->cr_csd_paddr, sc->sc_sram_base + 386 sizeof(struct cesa_sa_hdesc), sizeof(struct cesa_sa_data))); 387} 388 389static struct cesa_tdma_desc * 390cesa_tdma_copy_sdesc(struct cesa_softc *sc, struct cesa_sa_desc *csd) 391{ 392 393 return (cesa_tdma_copy(sc, sc->sc_sram_base, csd->csd_cshd_paddr, 394 sizeof(struct cesa_sa_hdesc))); 395} 396 397static void 398cesa_append_tdesc(struct cesa_request *cr, struct cesa_tdma_desc *ctd) 399{ 400 struct cesa_tdma_desc *ctd_prev; 401 402 if (!STAILQ_EMPTY(&cr->cr_tdesc)) { 403 ctd_prev = STAILQ_LAST(&cr->cr_tdesc, cesa_tdma_desc, ctd_stq); 404 ctd_prev->ctd_cthd->cthd_next = ctd->ctd_cthd_paddr; 405 } 406 407 ctd->ctd_cthd->cthd_next = 0; 408 STAILQ_INSERT_TAIL(&cr->cr_tdesc, ctd, ctd_stq); 409} 410 411static int 412cesa_append_packet(struct cesa_softc *sc, struct cesa_request *cr, 413 struct cesa_packet *cp, struct cesa_sa_desc *csd) 414{ 415 struct cesa_tdma_desc *ctd, *tmp; 416 417 /* Copy SA descriptor for this packet */ 418 ctd = cesa_tdma_copy_sdesc(sc, csd); 419 if (!ctd) 420 return (ENOMEM); 421 422 cesa_append_tdesc(cr, ctd); 423 424 /* Copy data to be processed */ 425 STAILQ_FOREACH_SAFE(ctd, &cp->cp_copyin, ctd_stq, tmp) 426 cesa_append_tdesc(cr, ctd); 427 STAILQ_INIT(&cp->cp_copyin); 428 429 /* Insert control descriptor */ 430 ctd = cesa_tdma_copy(sc, 0, 0, 0); 431 if (!ctd) 432 return (ENOMEM); 433 434 cesa_append_tdesc(cr, ctd); 435 436 /* Copy back results */ 437 STAILQ_FOREACH_SAFE(ctd, &cp->cp_copyout, ctd_stq, tmp) 438 cesa_append_tdesc(cr, ctd); 439 STAILQ_INIT(&cp->cp_copyout); 440 441 return (0); 442} 443 444static int 445cesa_set_mkey(struct cesa_session *cs, int alg, const uint8_t *mkey, int mklen) 446{ 447 uint8_t ipad[CESA_MAX_HMAC_BLOCK_LEN]; 448 uint8_t opad[CESA_MAX_HMAC_BLOCK_LEN]; 449 SHA1_CTX sha1ctx; 450 MD5_CTX md5ctx; 451 uint32_t *hout; 452 uint32_t *hin; 453 int i; 454 455 memset(ipad, HMAC_IPAD_VAL, CESA_MAX_HMAC_BLOCK_LEN); 456 memset(opad, HMAC_OPAD_VAL, CESA_MAX_HMAC_BLOCK_LEN); 457 for (i = 0; i < mklen; i++) { 458 ipad[i] ^= mkey[i]; 459 opad[i] ^= mkey[i]; 460 } 461 462 hin = (uint32_t *)cs->cs_hiv_in; 463 hout = (uint32_t *)cs->cs_hiv_out; 464 465 switch (alg) { 466 case CRYPTO_MD5_HMAC: 467 MD5Init(&md5ctx); 468 MD5Update(&md5ctx, ipad, MD5_HMAC_BLOCK_LEN); 469 memcpy(hin, md5ctx.state, sizeof(md5ctx.state)); 470 MD5Init(&md5ctx); 471 MD5Update(&md5ctx, opad, MD5_HMAC_BLOCK_LEN); 472 memcpy(hout, md5ctx.state, sizeof(md5ctx.state)); 473 break; 474 case CRYPTO_SHA1_HMAC: 475 SHA1Init(&sha1ctx); 476 SHA1Update(&sha1ctx, ipad, SHA1_HMAC_BLOCK_LEN); 477 memcpy(hin, sha1ctx.h.b32, sizeof(sha1ctx.h.b32)); 478 SHA1Init(&sha1ctx); 479 SHA1Update(&sha1ctx, opad, SHA1_HMAC_BLOCK_LEN); 480 memcpy(hout, sha1ctx.h.b32, sizeof(sha1ctx.h.b32)); 481 break; 482 default: 483 return (EINVAL); 484 } 485 486 for (i = 0; i < CESA_MAX_HASH_LEN / sizeof(uint32_t); i++) { 487 hin[i] = htobe32(hin[i]); 488 hout[i] = htobe32(hout[i]); 489 } 490 491 return (0); 492} 493 494static int 495cesa_prep_aes_key(struct cesa_session *cs) 496{ 497 uint32_t ek[4 * (RIJNDAEL_MAXNR + 1)]; 498 uint32_t *dkey; 499 int i; 500 501 rijndaelKeySetupEnc(ek, cs->cs_key, cs->cs_klen * 8); 502 503 cs->cs_config &= ~CESA_CSH_AES_KLEN_MASK; 504 dkey = (uint32_t *)cs->cs_aes_dkey; 505 506 switch (cs->cs_klen) { 507 case 16: 508 cs->cs_config |= CESA_CSH_AES_KLEN_128; 509 for (i = 0; i < 4; i++) 510 *dkey++ = htobe32(ek[4 * 10 + i]); 511 break; 512 case 24: 513 cs->cs_config |= CESA_CSH_AES_KLEN_192; 514 for (i = 0; i < 4; i++) 515 *dkey++ = htobe32(ek[4 * 12 + i]); 516 for (i = 0; i < 2; i++) 517 *dkey++ = htobe32(ek[4 * 11 + 2 + i]); 518 break; 519 case 32: 520 cs->cs_config |= CESA_CSH_AES_KLEN_256; 521 for (i = 0; i < 4; i++) 522 *dkey++ = htobe32(ek[4 * 14 + i]); 523 for (i = 0; i < 4; i++) 524 *dkey++ = htobe32(ek[4 * 13 + i]); 525 break; 526 default: 527 return (EINVAL); 528 } 529 530 return (0); 531} 532 533static int 534cesa_is_hash(int alg) 535{ 536 537 switch (alg) { 538 case CRYPTO_MD5: 539 case CRYPTO_MD5_HMAC: 540 case CRYPTO_SHA1: 541 case CRYPTO_SHA1_HMAC: 542 return (1); 543 default: 544 return (0); 545 } 546} 547 548static void 549cesa_start_packet(struct cesa_packet *cp, unsigned int size) 550{ 551 552 cp->cp_size = size; 553 cp->cp_offset = 0; 554 STAILQ_INIT(&cp->cp_copyin); 555 STAILQ_INIT(&cp->cp_copyout); 556} 557 558static int 559cesa_fill_packet(struct cesa_softc *sc, struct cesa_packet *cp, 560 bus_dma_segment_t *seg) 561{ 562 struct cesa_tdma_desc *ctd; 563 unsigned int bsize; 564 565 /* Calculate size of block copy */ 566 bsize = MIN(seg->ds_len, cp->cp_size - cp->cp_offset); 567 568 if (bsize > 0) { 569 ctd = cesa_tdma_copy(sc, sc->sc_sram_base + 570 CESA_DATA(cp->cp_offset), seg->ds_addr, bsize); 571 if (!ctd) 572 return (-ENOMEM); 573 574 STAILQ_INSERT_TAIL(&cp->cp_copyin, ctd, ctd_stq); 575 576 ctd = cesa_tdma_copy(sc, seg->ds_addr, sc->sc_sram_base + 577 CESA_DATA(cp->cp_offset), bsize); 578 if (!ctd) 579 return (-ENOMEM); 580 581 STAILQ_INSERT_TAIL(&cp->cp_copyout, ctd, ctd_stq); 582 583 seg->ds_len -= bsize; 584 seg->ds_addr += bsize; 585 cp->cp_offset += bsize; 586 } 587 588 return (bsize); 589} 590 591static void 592cesa_create_chain_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 593{ 594 unsigned int mpsize, fragmented; 595 unsigned int mlen, mskip, tmlen; 596 struct cesa_chain_info *cci; 597 unsigned int elen, eskip; 598 unsigned int skip, len; 599 struct cesa_sa_desc *csd; 600 struct cesa_request *cr; 601 struct cesa_softc *sc; 602 struct cesa_packet cp; 603 bus_dma_segment_t seg; 604 uint32_t config; 605 int size; 606 607 cci = arg; 608 sc = cci->cci_sc; 609 cr = cci->cci_cr; 610 611 if (error) { 612 cci->cci_error = error; 613 return; 614 } 615 616 elen = cci->cci_enc ? cci->cci_enc->crd_len : 0; 617 eskip = cci->cci_enc ? cci->cci_enc->crd_skip : 0; 618 mlen = cci->cci_mac ? cci->cci_mac->crd_len : 0; 619 mskip = cci->cci_mac ? cci->cci_mac->crd_skip : 0; 620 621 if (elen && mlen && 622 ((eskip > mskip && ((eskip - mskip) & (cr->cr_cs->cs_ivlen - 1))) || 623 (mskip > eskip && ((mskip - eskip) & (cr->cr_cs->cs_mblen - 1))) || 624 (eskip > (mskip + mlen)) || (mskip > (eskip + elen)))) { 625 /* 626 * Data alignment in the request does not meet CESA requiremnts 627 * for combined encryption/decryption and hashing. We have to 628 * split the request to separate operations and process them 629 * one by one. 630 */ 631 config = cci->cci_config; 632 if ((config & CESA_CSHD_OP_MASK) == CESA_CSHD_MAC_AND_ENC) { 633 config &= ~CESA_CSHD_OP_MASK; 634 635 cci->cci_config = config | CESA_CSHD_MAC; 636 cci->cci_enc = NULL; 637 cci->cci_mac = cr->cr_mac; 638 cesa_create_chain_cb(cci, segs, nseg, cci->cci_error); 639 640 cci->cci_config = config | CESA_CSHD_ENC; 641 cci->cci_enc = cr->cr_enc; 642 cci->cci_mac = NULL; 643 cesa_create_chain_cb(cci, segs, nseg, cci->cci_error); 644 } else { 645 config &= ~CESA_CSHD_OP_MASK; 646 647 cci->cci_config = config | CESA_CSHD_ENC; 648 cci->cci_enc = cr->cr_enc; 649 cci->cci_mac = NULL; 650 cesa_create_chain_cb(cci, segs, nseg, cci->cci_error); 651 652 cci->cci_config = config | CESA_CSHD_MAC; 653 cci->cci_enc = NULL; 654 cci->cci_mac = cr->cr_mac; 655 cesa_create_chain_cb(cci, segs, nseg, cci->cci_error); 656 } 657 658 return; 659 } 660 661 tmlen = mlen; 662 fragmented = 0; 663 mpsize = CESA_MAX_PACKET_SIZE; 664 mpsize &= ~((cr->cr_cs->cs_ivlen - 1) | (cr->cr_cs->cs_mblen - 1)); 665 666 if (elen && mlen) { 667 skip = MIN(eskip, mskip); 668 len = MAX(elen + eskip, mlen + mskip) - skip; 669 } else if (elen) { 670 skip = eskip; 671 len = elen; 672 } else { 673 skip = mskip; 674 len = mlen; 675 } 676 677 /* Start first packet in chain */ 678 cesa_start_packet(&cp, MIN(mpsize, len)); 679 680 while (nseg-- && len > 0) { 681 seg = *(segs++); 682 683 /* 684 * Skip data in buffer on which neither ENC nor MAC operation 685 * is requested. 686 */ 687 if (skip > 0) { 688 size = MIN(skip, seg.ds_len); 689 skip -= size; 690 691 seg.ds_addr += size; 692 seg.ds_len -= size; 693 694 if (eskip > 0) 695 eskip -= size; 696 697 if (mskip > 0) 698 mskip -= size; 699 700 if (seg.ds_len == 0) 701 continue; 702 } 703 704 while (1) { 705 /* 706 * Fill in current packet with data. Break if there is 707 * no more data in current DMA segment or an error 708 * occurred. 709 */ 710 size = cesa_fill_packet(sc, &cp, &seg); 711 if (size <= 0) { 712 error = -size; 713 break; 714 } 715 716 len -= size; 717 718 /* If packet is full, append it to the chain */ 719 if (cp.cp_size == cp.cp_offset) { 720 csd = cesa_alloc_sdesc(sc, cr); 721 if (!csd) { 722 error = ENOMEM; 723 break; 724 } 725 726 /* Create SA descriptor for this packet */ 727 csd->csd_cshd->cshd_config = cci->cci_config; 728 csd->csd_cshd->cshd_mac_total_dlen = tmlen; 729 730 /* 731 * Enable fragmentation if request will not fit 732 * into one packet. 733 */ 734 if (len > 0) { 735 if (!fragmented) { 736 fragmented = 1; 737 csd->csd_cshd->cshd_config |= 738 CESA_CSHD_FRAG_FIRST; 739 } else 740 csd->csd_cshd->cshd_config |= 741 CESA_CSHD_FRAG_MIDDLE; 742 } else if (fragmented) 743 csd->csd_cshd->cshd_config |= 744 CESA_CSHD_FRAG_LAST; 745 746 if (eskip < cp.cp_size && elen > 0) { 747 csd->csd_cshd->cshd_enc_src = 748 CESA_DATA(eskip); 749 csd->csd_cshd->cshd_enc_dst = 750 CESA_DATA(eskip); 751 csd->csd_cshd->cshd_enc_dlen = 752 MIN(elen, cp.cp_size - eskip); 753 } 754 755 if (mskip < cp.cp_size && mlen > 0) { 756 csd->csd_cshd->cshd_mac_src = 757 CESA_DATA(mskip); 758 csd->csd_cshd->cshd_mac_dlen = 759 MIN(mlen, cp.cp_size - mskip); 760 } 761 762 elen -= csd->csd_cshd->cshd_enc_dlen; 763 eskip -= MIN(eskip, cp.cp_size); 764 mlen -= csd->csd_cshd->cshd_mac_dlen; 765 mskip -= MIN(mskip, cp.cp_size); 766 767 cesa_dump_cshd(sc, csd->csd_cshd); 768 769 /* Append packet to the request */ 770 error = cesa_append_packet(sc, cr, &cp, csd); 771 if (error) 772 break; 773 774 /* Start a new packet, as current is full */ 775 cesa_start_packet(&cp, MIN(mpsize, len)); 776 } 777 } 778 779 if (error) 780 break; 781 } 782 783 if (error) { 784 /* 785 * Move all allocated resources to the request. They will be 786 * freed later. 787 */ 788 STAILQ_CONCAT(&cr->cr_tdesc, &cp.cp_copyin); 789 STAILQ_CONCAT(&cr->cr_tdesc, &cp.cp_copyout); 790 cci->cci_error = error; 791 } 792} 793 794static void 795cesa_create_chain_cb2(void *arg, bus_dma_segment_t *segs, int nseg, 796 bus_size_t size, int error) 797{ 798 799 cesa_create_chain_cb(arg, segs, nseg, error); 800} 801 802static int 803cesa_create_chain(struct cesa_softc *sc, struct cesa_request *cr) 804{ 805 struct cesa_chain_info cci; 806 struct cesa_tdma_desc *ctd; 807 uint32_t config; 808 int error; 809 810 error = 0; 811 CESA_LOCK_ASSERT(sc, sessions); 812 813 /* Create request metadata */ 814 if (cr->cr_enc) { 815 if (cr->cr_enc->crd_alg == CRYPTO_AES_CBC && 816 (cr->cr_enc->crd_flags & CRD_F_ENCRYPT) == 0) 817 memcpy(cr->cr_csd->csd_key, cr->cr_cs->cs_aes_dkey, 818 cr->cr_cs->cs_klen); 819 else 820 memcpy(cr->cr_csd->csd_key, cr->cr_cs->cs_key, 821 cr->cr_cs->cs_klen); 822 } 823 824 if (cr->cr_mac) { 825 memcpy(cr->cr_csd->csd_hiv_in, cr->cr_cs->cs_hiv_in, 826 CESA_MAX_HASH_LEN); 827 memcpy(cr->cr_csd->csd_hiv_out, cr->cr_cs->cs_hiv_out, 828 CESA_MAX_HASH_LEN); 829 } 830 831 ctd = cesa_tdma_copyin_sa_data(sc, cr); 832 if (!ctd) 833 return (ENOMEM); 834 835 cesa_append_tdesc(cr, ctd); 836 837 /* Prepare SA configuration */ 838 config = cr->cr_cs->cs_config; 839 840 if (cr->cr_enc && (cr->cr_enc->crd_flags & CRD_F_ENCRYPT) == 0) 841 config |= CESA_CSHD_DECRYPT; 842 if (cr->cr_enc && !cr->cr_mac) 843 config |= CESA_CSHD_ENC; 844 if (!cr->cr_enc && cr->cr_mac) 845 config |= CESA_CSHD_MAC; 846 if (cr->cr_enc && cr->cr_mac) 847 config |= (config & CESA_CSHD_DECRYPT) ? CESA_CSHD_MAC_AND_ENC : 848 CESA_CSHD_ENC_AND_MAC; 849 850 /* Create data packets */ 851 cci.cci_sc = sc; 852 cci.cci_cr = cr; 853 cci.cci_enc = cr->cr_enc; 854 cci.cci_mac = cr->cr_mac; 855 cci.cci_config = config; 856 cci.cci_error = 0; 857 858 if (cr->cr_crp->crp_flags & CRYPTO_F_IOV) 859 error = bus_dmamap_load_uio(sc->sc_data_dtag, 860 cr->cr_dmap, (struct uio *)cr->cr_crp->crp_buf, 861 cesa_create_chain_cb2, &cci, BUS_DMA_NOWAIT); 862 else if (cr->cr_crp->crp_flags & CRYPTO_F_IMBUF) 863 error = bus_dmamap_load_mbuf(sc->sc_data_dtag, 864 cr->cr_dmap, (struct mbuf *)cr->cr_crp->crp_buf, 865 cesa_create_chain_cb2, &cci, BUS_DMA_NOWAIT); 866 else 867 error = bus_dmamap_load(sc->sc_data_dtag, 868 cr->cr_dmap, cr->cr_crp->crp_buf, 869 cr->cr_crp->crp_ilen, cesa_create_chain_cb, &cci, 870 BUS_DMA_NOWAIT); 871 872 if (!error) 873 cr->cr_dmap_loaded = 1; 874 875 if (cci.cci_error) 876 error = cci.cci_error; 877 878 if (error) 879 return (error); 880 881 /* Read back request metadata */ 882 ctd = cesa_tdma_copyout_sa_data(sc, cr); 883 if (!ctd) 884 return (ENOMEM); 885 886 cesa_append_tdesc(cr, ctd); 887 888 return (0); 889} 890 891static void 892cesa_execute(struct cesa_softc *sc) 893{ 894 struct cesa_tdma_desc *prev_ctd, *ctd; 895 struct cesa_request *prev_cr, *cr; 896 897 CESA_LOCK(sc, requests); 898 899 /* 900 * If ready list is empty, there is nothing to execute. If queued list 901 * is not empty, the hardware is busy and we cannot start another 902 * execution. 903 */ 904 if (STAILQ_EMPTY(&sc->sc_ready_requests) || 905 !STAILQ_EMPTY(&sc->sc_queued_requests)) { 906 CESA_UNLOCK(sc, requests); 907 return; 908 } 909 910 /* Move all ready requests to queued list */ 911 STAILQ_CONCAT(&sc->sc_queued_requests, &sc->sc_ready_requests); 912 STAILQ_INIT(&sc->sc_ready_requests); 913 914 /* Create one execution chain from all requests on the list */ 915 if (STAILQ_FIRST(&sc->sc_queued_requests) != 916 STAILQ_LAST(&sc->sc_queued_requests, cesa_request, cr_stq)) { 917 prev_cr = NULL; 918 cesa_sync_dma_mem(&sc->sc_tdesc_cdm, BUS_DMASYNC_POSTREAD | 919 BUS_DMASYNC_POSTWRITE); 920 921 STAILQ_FOREACH(cr, &sc->sc_queued_requests, cr_stq) { 922 if (prev_cr) { 923 ctd = STAILQ_FIRST(&cr->cr_tdesc); 924 prev_ctd = STAILQ_LAST(&prev_cr->cr_tdesc, 925 cesa_tdma_desc, ctd_stq); 926 927 prev_ctd->ctd_cthd->cthd_next = 928 ctd->ctd_cthd_paddr; 929 } 930 931 prev_cr = cr; 932 } 933 934 cesa_sync_dma_mem(&sc->sc_tdesc_cdm, BUS_DMASYNC_PREREAD | 935 BUS_DMASYNC_PREWRITE); 936 } 937 938 /* Start chain execution in hardware */ 939 cr = STAILQ_FIRST(&sc->sc_queued_requests); 940 ctd = STAILQ_FIRST(&cr->cr_tdesc); 941 942 CESA_WRITE(sc, CESA_TDMA_ND, ctd->ctd_cthd_paddr); 943 CESA_WRITE(sc, CESA_SA_CMD, CESA_SA_CMD_ACTVATE); 944 945 CESA_UNLOCK(sc, requests); 946} 947 948static int 949cesa_setup_sram(struct cesa_softc *sc) 950{ 951 phandle_t sram_node; 952 ihandle_t sram_ihandle; 953 pcell_t sram_handle, sram_reg; 954 955 if (OF_getprop(ofw_bus_get_node(sc->sc_dev), "sram-handle", 956 (void *)&sram_handle, sizeof(sram_handle)) <= 0) 957 return (ENXIO); 958 959 sram_ihandle = (ihandle_t)sram_handle; 960 sram_ihandle = fdt32_to_cpu(sram_ihandle); 961 sram_node = OF_instance_to_package(sram_ihandle); 962 963 if (OF_getprop(sram_node, "reg", (void *)&sram_reg, 964 sizeof(sram_reg)) <= 0) 965 return (ENXIO); 966 967 sc->sc_sram_base = fdt32_to_cpu(sram_reg); 968 969 return (0); 970} 971 972static int 973cesa_probe(device_t dev) 974{ 975 976 if (!ofw_bus_status_okay(dev)) 977 return (ENXIO); 978 979 if (!ofw_bus_is_compatible(dev, "mrvl,cesa")) 980 return (ENXIO); 981 982 device_set_desc(dev, "Marvell Cryptographic Engine and Security " 983 "Accelerator"); 984 985 return (BUS_PROBE_DEFAULT); 986} 987 988static int 989cesa_attach(device_t dev) 990{ 991 struct cesa_softc *sc; 992 uint32_t d, r; 993 int error; 994 int i; 995 996 sc = device_get_softc(dev); 997 sc->sc_blocked = 0; 998 sc->sc_error = 0; 999 sc->sc_dev = dev; 1000 1001 /* Check if CESA peripheral device has power turned on */ 1002#if defined(SOC_MV_KIRKWOOD) 1003 if (soc_power_ctrl_get(CPU_PM_CTRL_CRYPTO) == CPU_PM_CTRL_CRYPTO) { 1004 device_printf(dev, "not powered on\n"); 1005 return (ENXIO); 1006 } 1007#else 1008 if (soc_power_ctrl_get(CPU_PM_CTRL_CRYPTO) != CPU_PM_CTRL_CRYPTO) { 1009 device_printf(dev, "not powered on\n"); 1010 return (ENXIO); 1011 } 1012#endif 1013 soc_id(&d, &r); 1014 1015 switch (d) { 1016 case MV_DEV_88F6281: 1017 case MV_DEV_88F6282: 1018 sc->sc_tperr = 0; 1019 break; 1020 case MV_DEV_MV78100: 1021 case MV_DEV_MV78100_Z0: 1022 sc->sc_tperr = CESA_ICR_TPERR; 1023 break; 1024 default: 1025 return (ENXIO); 1026 } 1027 1028 /* Initialize mutexes */ 1029 mtx_init(&sc->sc_sc_lock, device_get_nameunit(dev), 1030 "CESA Shared Data", MTX_DEF); 1031 mtx_init(&sc->sc_tdesc_lock, device_get_nameunit(dev), 1032 "CESA TDMA Descriptors Pool", MTX_DEF); 1033 mtx_init(&sc->sc_sdesc_lock, device_get_nameunit(dev), 1034 "CESA SA Descriptors Pool", MTX_DEF); 1035 mtx_init(&sc->sc_requests_lock, device_get_nameunit(dev), 1036 "CESA Requests Pool", MTX_DEF); 1037 mtx_init(&sc->sc_sessions_lock, device_get_nameunit(dev), 1038 "CESA Sessions Pool", MTX_DEF); 1039 1040 /* Allocate I/O and IRQ resources */ 1041 error = bus_alloc_resources(dev, cesa_res_spec, sc->sc_res); 1042 if (error) { 1043 device_printf(dev, "could not allocate resources\n"); 1044 goto err0; 1045 } 1046 1047 sc->sc_bsh = rman_get_bushandle(*(sc->sc_res)); 1048 sc->sc_bst = rman_get_bustag(*(sc->sc_res)); 1049 1050 /* Setup CESA decoding windows */ 1051 error = decode_win_cesa_setup(sc); 1052 if (error) { 1053 device_printf(dev, "could not setup decoding windows\n"); 1054 goto err1; 1055 } 1056 1057 /* Acquire SRAM base address */ 1058 error = cesa_setup_sram(sc); 1059 if (error) { 1060 device_printf(dev, "could not setup SRAM\n"); 1061 goto err1; 1062 } 1063 1064 /* Setup interrupt handler */ 1065 error = bus_setup_intr(dev, sc->sc_res[1], INTR_TYPE_NET | INTR_MPSAFE, 1066 NULL, cesa_intr, sc, &(sc->sc_icookie)); 1067 if (error) { 1068 device_printf(dev, "could not setup engine completion irq\n"); 1069 goto err1; 1070 } 1071 1072 /* Create DMA tag for processed data */ 1073 error = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 1074 1, 0, /* alignment, boundary */ 1075 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 1076 BUS_SPACE_MAXADDR, /* highaddr */ 1077 NULL, NULL, /* filtfunc, filtfuncarg */ 1078 CESA_MAX_REQUEST_SIZE, /* maxsize */ 1079 CESA_MAX_FRAGMENTS, /* nsegments */ 1080 CESA_MAX_REQUEST_SIZE, 0, /* maxsegsz, flags */ 1081 NULL, NULL, /* lockfunc, lockfuncarg */ 1082 &sc->sc_data_dtag); /* dmat */ 1083 if (error) 1084 goto err2; 1085 1086 /* Initialize data structures: TDMA Descriptors Pool */ 1087 error = cesa_alloc_dma_mem(sc, &sc->sc_tdesc_cdm, 1088 CESA_TDMA_DESCRIPTORS * sizeof(struct cesa_tdma_hdesc)); 1089 if (error) 1090 goto err3; 1091 1092 STAILQ_INIT(&sc->sc_free_tdesc); 1093 for (i = 0; i < CESA_TDMA_DESCRIPTORS; i++) { 1094 sc->sc_tdesc[i].ctd_cthd = 1095 (struct cesa_tdma_hdesc *)(sc->sc_tdesc_cdm.cdm_vaddr) + i; 1096 sc->sc_tdesc[i].ctd_cthd_paddr = sc->sc_tdesc_cdm.cdm_paddr + 1097 (i * sizeof(struct cesa_tdma_hdesc)); 1098 STAILQ_INSERT_TAIL(&sc->sc_free_tdesc, &sc->sc_tdesc[i], 1099 ctd_stq); 1100 } 1101 1102 /* Initialize data structures: SA Descriptors Pool */ 1103 error = cesa_alloc_dma_mem(sc, &sc->sc_sdesc_cdm, 1104 CESA_SA_DESCRIPTORS * sizeof(struct cesa_sa_hdesc)); 1105 if (error) 1106 goto err4; 1107 1108 STAILQ_INIT(&sc->sc_free_sdesc); 1109 for (i = 0; i < CESA_SA_DESCRIPTORS; i++) { 1110 sc->sc_sdesc[i].csd_cshd = 1111 (struct cesa_sa_hdesc *)(sc->sc_sdesc_cdm.cdm_vaddr) + i; 1112 sc->sc_sdesc[i].csd_cshd_paddr = sc->sc_sdesc_cdm.cdm_paddr + 1113 (i * sizeof(struct cesa_sa_hdesc)); 1114 STAILQ_INSERT_TAIL(&sc->sc_free_sdesc, &sc->sc_sdesc[i], 1115 csd_stq); 1116 } 1117 1118 /* Initialize data structures: Requests Pool */ 1119 error = cesa_alloc_dma_mem(sc, &sc->sc_requests_cdm, 1120 CESA_REQUESTS * sizeof(struct cesa_sa_data)); 1121 if (error) 1122 goto err5; 1123 1124 STAILQ_INIT(&sc->sc_free_requests); 1125 STAILQ_INIT(&sc->sc_ready_requests); 1126 STAILQ_INIT(&sc->sc_queued_requests); 1127 for (i = 0; i < CESA_REQUESTS; i++) { 1128 sc->sc_requests[i].cr_csd = 1129 (struct cesa_sa_data *)(sc->sc_requests_cdm.cdm_vaddr) + i; 1130 sc->sc_requests[i].cr_csd_paddr = 1131 sc->sc_requests_cdm.cdm_paddr + 1132 (i * sizeof(struct cesa_sa_data)); 1133 1134 /* Preallocate DMA maps */ 1135 error = bus_dmamap_create(sc->sc_data_dtag, 0, 1136 &sc->sc_requests[i].cr_dmap); 1137 if (error && i > 0) { 1138 i--; 1139 do { 1140 bus_dmamap_destroy(sc->sc_data_dtag, 1141 sc->sc_requests[i].cr_dmap); 1142 } while (i--); 1143 1144 goto err6; 1145 } 1146 1147 STAILQ_INSERT_TAIL(&sc->sc_free_requests, &sc->sc_requests[i], 1148 cr_stq); 1149 } 1150 1151 /* Initialize data structures: Sessions Pool */ 1152 STAILQ_INIT(&sc->sc_free_sessions); 1153 for (i = 0; i < CESA_SESSIONS; i++) { 1154 sc->sc_sessions[i].cs_sid = i; 1155 STAILQ_INSERT_TAIL(&sc->sc_free_sessions, &sc->sc_sessions[i], 1156 cs_stq); 1157 } 1158 1159 /* 1160 * Initialize TDMA: 1161 * - Burst limit: 128 bytes, 1162 * - Outstanding reads enabled, 1163 * - No byte-swap. 1164 */ 1165 CESA_WRITE(sc, CESA_TDMA_CR, CESA_TDMA_CR_DBL128 | CESA_TDMA_CR_SBL128 | 1166 CESA_TDMA_CR_ORDEN | CESA_TDMA_CR_NBS | CESA_TDMA_CR_ENABLE); 1167 1168 /* 1169 * Initialize SA: 1170 * - SA descriptor is present at beginning of CESA SRAM, 1171 * - Multi-packet chain mode, 1172 * - Cooperation with TDMA enabled. 1173 */ 1174 CESA_WRITE(sc, CESA_SA_DPR, 0); 1175 CESA_WRITE(sc, CESA_SA_CR, CESA_SA_CR_ACTIVATE_TDMA | 1176 CESA_SA_CR_WAIT_FOR_TDMA | CESA_SA_CR_MULTI_MODE); 1177 1178 /* Unmask interrupts */ 1179 CESA_WRITE(sc, CESA_ICR, 0); 1180 CESA_WRITE(sc, CESA_ICM, CESA_ICM_ACCTDMA | sc->sc_tperr); 1181 CESA_WRITE(sc, CESA_TDMA_ECR, 0); 1182 CESA_WRITE(sc, CESA_TDMA_EMR, CESA_TDMA_EMR_MISS | 1183 CESA_TDMA_EMR_DOUBLE_HIT | CESA_TDMA_EMR_BOTH_HIT | 1184 CESA_TDMA_EMR_DATA_ERROR); 1185 1186 /* Register in OCF */ 1187 sc->sc_cid = crypto_get_driverid(dev, CRYPTOCAP_F_HARDWARE); 1188 if (sc->sc_cid) { 1189 device_printf(dev, "could not get crypto driver id\n"); 1190 goto err7; 1191 } 1192 1193 crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0); 1194 crypto_register(sc->sc_cid, CRYPTO_DES_CBC, 0, 0); 1195 crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0); 1196 crypto_register(sc->sc_cid, CRYPTO_MD5, 0, 0); 1197 crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0); 1198 crypto_register(sc->sc_cid, CRYPTO_SHA1, 0, 0); 1199 crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0); 1200 1201 return (0); 1202err7: 1203 for (i = 0; i < CESA_REQUESTS; i++) 1204 bus_dmamap_destroy(sc->sc_data_dtag, 1205 sc->sc_requests[i].cr_dmap); 1206err6: 1207 cesa_free_dma_mem(&sc->sc_requests_cdm); 1208err5: 1209 cesa_free_dma_mem(&sc->sc_sdesc_cdm); 1210err4: 1211 cesa_free_dma_mem(&sc->sc_tdesc_cdm); 1212err3: 1213 bus_dma_tag_destroy(sc->sc_data_dtag); 1214err2: 1215 bus_teardown_intr(dev, sc->sc_res[1], sc->sc_icookie); 1216err1: 1217 bus_release_resources(dev, cesa_res_spec, sc->sc_res); 1218err0: 1219 mtx_destroy(&sc->sc_sessions_lock); 1220 mtx_destroy(&sc->sc_requests_lock); 1221 mtx_destroy(&sc->sc_sdesc_lock); 1222 mtx_destroy(&sc->sc_tdesc_lock); 1223 mtx_destroy(&sc->sc_sc_lock); 1224 return (ENXIO); 1225} 1226 1227static int 1228cesa_detach(device_t dev) 1229{ 1230 struct cesa_softc *sc; 1231 int i; 1232 1233 sc = device_get_softc(dev); 1234 1235 /* TODO: Wait for queued requests completion before shutdown. */ 1236 1237 /* Mask interrupts */ 1238 CESA_WRITE(sc, CESA_ICM, 0); 1239 CESA_WRITE(sc, CESA_TDMA_EMR, 0); 1240 1241 /* Unregister from OCF */ 1242 crypto_unregister_all(sc->sc_cid); 1243 1244 /* Free DMA Maps */ 1245 for (i = 0; i < CESA_REQUESTS; i++) 1246 bus_dmamap_destroy(sc->sc_data_dtag, 1247 sc->sc_requests[i].cr_dmap); 1248 1249 /* Free DMA Memory */ 1250 cesa_free_dma_mem(&sc->sc_requests_cdm); 1251 cesa_free_dma_mem(&sc->sc_sdesc_cdm); 1252 cesa_free_dma_mem(&sc->sc_tdesc_cdm); 1253 1254 /* Free DMA Tag */ 1255 bus_dma_tag_destroy(sc->sc_data_dtag); 1256 1257 /* Stop interrupt */ 1258 bus_teardown_intr(dev, sc->sc_res[1], sc->sc_icookie); 1259 1260 /* Relase I/O and IRQ resources */ 1261 bus_release_resources(dev, cesa_res_spec, sc->sc_res); 1262 1263 /* Destroy mutexes */ 1264 mtx_destroy(&sc->sc_sessions_lock); 1265 mtx_destroy(&sc->sc_requests_lock); 1266 mtx_destroy(&sc->sc_sdesc_lock); 1267 mtx_destroy(&sc->sc_tdesc_lock); 1268 mtx_destroy(&sc->sc_sc_lock); 1269 1270 return (0); 1271} 1272 1273static void 1274cesa_intr(void *arg) 1275{ 1276 STAILQ_HEAD(, cesa_request) requests; 1277 struct cesa_request *cr, *tmp; 1278 struct cesa_softc *sc; 1279 uint32_t ecr, icr; 1280 int blocked; 1281 1282 sc = arg; 1283 1284 /* Ack interrupt */ 1285 ecr = CESA_READ(sc, CESA_TDMA_ECR); 1286 CESA_WRITE(sc, CESA_TDMA_ECR, 0); 1287 icr = CESA_READ(sc, CESA_ICR); 1288 CESA_WRITE(sc, CESA_ICR, 0); 1289 1290 /* Check for TDMA errors */ 1291 if (ecr & CESA_TDMA_ECR_MISS) { 1292 device_printf(sc->sc_dev, "TDMA Miss error detected!\n"); 1293 sc->sc_error = EIO; 1294 } 1295 1296 if (ecr & CESA_TDMA_ECR_DOUBLE_HIT) { 1297 device_printf(sc->sc_dev, "TDMA Double Hit error detected!\n"); 1298 sc->sc_error = EIO; 1299 } 1300 1301 if (ecr & CESA_TDMA_ECR_BOTH_HIT) { 1302 device_printf(sc->sc_dev, "TDMA Both Hit error detected!\n"); 1303 sc->sc_error = EIO; 1304 } 1305 1306 if (ecr & CESA_TDMA_ECR_DATA_ERROR) { 1307 device_printf(sc->sc_dev, "TDMA Data error detected!\n"); 1308 sc->sc_error = EIO; 1309 } 1310 1311 /* Check for CESA errors */ 1312 if (icr & sc->sc_tperr) { 1313 device_printf(sc->sc_dev, "CESA SRAM Parity error detected!\n"); 1314 sc->sc_error = EIO; 1315 } 1316 1317 /* If there is nothing more to do, return */ 1318 if ((icr & CESA_ICR_ACCTDMA) == 0) 1319 return; 1320 1321 /* Get all finished requests */ 1322 CESA_LOCK(sc, requests); 1323 STAILQ_INIT(&requests); 1324 STAILQ_CONCAT(&requests, &sc->sc_queued_requests); 1325 STAILQ_INIT(&sc->sc_queued_requests); 1326 CESA_UNLOCK(sc, requests); 1327 1328 /* Execute all ready requests */ 1329 cesa_execute(sc); 1330 1331 /* Process completed requests */ 1332 cesa_sync_dma_mem(&sc->sc_requests_cdm, BUS_DMASYNC_POSTREAD | 1333 BUS_DMASYNC_POSTWRITE); 1334 1335 STAILQ_FOREACH_SAFE(cr, &requests, cr_stq, tmp) { 1336 bus_dmamap_sync(sc->sc_data_dtag, cr->cr_dmap, 1337 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1338 1339 cr->cr_crp->crp_etype = sc->sc_error; 1340 if (cr->cr_mac) 1341 crypto_copyback(cr->cr_crp->crp_flags, 1342 cr->cr_crp->crp_buf, cr->cr_mac->crd_inject, 1343 cr->cr_cs->cs_hlen, cr->cr_csd->csd_hash); 1344 1345 crypto_done(cr->cr_crp); 1346 cesa_free_request(sc, cr); 1347 } 1348 1349 cesa_sync_dma_mem(&sc->sc_requests_cdm, BUS_DMASYNC_PREREAD | 1350 BUS_DMASYNC_PREWRITE); 1351 1352 sc->sc_error = 0; 1353 1354 /* Unblock driver if it ran out of resources */ 1355 CESA_LOCK(sc, sc); 1356 blocked = sc->sc_blocked; 1357 sc->sc_blocked = 0; 1358 CESA_UNLOCK(sc, sc); 1359 1360 if (blocked) 1361 crypto_unblock(sc->sc_cid, blocked); 1362} 1363 1364static int 1365cesa_newsession(device_t dev, uint32_t *sidp, struct cryptoini *cri) 1366{ 1367 struct cesa_session *cs; 1368 struct cesa_softc *sc; 1369 struct cryptoini *enc; 1370 struct cryptoini *mac; 1371 int error; 1372 1373 sc = device_get_softc(dev); 1374 enc = NULL; 1375 mac = NULL; 1376 error = 0; 1377 1378 /* Check and parse input */ 1379 if (cesa_is_hash(cri->cri_alg)) 1380 mac = cri; 1381 else 1382 enc = cri; 1383 1384 cri = cri->cri_next; 1385 1386 if (cri) { 1387 if (!enc && !cesa_is_hash(cri->cri_alg)) 1388 enc = cri; 1389 1390 if (!mac && cesa_is_hash(cri->cri_alg)) 1391 mac = cri; 1392 1393 if (cri->cri_next || !(enc && mac)) 1394 return (EINVAL); 1395 } 1396 1397 if ((enc && (enc->cri_klen / 8) > CESA_MAX_KEY_LEN) || 1398 (mac && (mac->cri_klen / 8) > CESA_MAX_MKEY_LEN)) 1399 return (E2BIG); 1400 1401 /* Allocate session */ 1402 cs = cesa_alloc_session(sc); 1403 if (!cs) 1404 return (ENOMEM); 1405 1406 /* Prepare CESA configuration */ 1407 cs->cs_config = 0; 1408 cs->cs_ivlen = 1; 1409 cs->cs_mblen = 1; 1410 1411 if (enc) { 1412 switch (enc->cri_alg) { 1413 case CRYPTO_AES_CBC: 1414 cs->cs_config |= CESA_CSHD_AES | CESA_CSHD_CBC; 1415 cs->cs_ivlen = AES_BLOCK_LEN; 1416 break; 1417 case CRYPTO_DES_CBC: 1418 cs->cs_config |= CESA_CSHD_DES | CESA_CSHD_CBC; 1419 cs->cs_ivlen = DES_BLOCK_LEN; 1420 break; 1421 case CRYPTO_3DES_CBC: 1422 cs->cs_config |= CESA_CSHD_3DES | CESA_CSHD_3DES_EDE | 1423 CESA_CSHD_CBC; 1424 cs->cs_ivlen = DES3_BLOCK_LEN; 1425 break; 1426 default: 1427 error = EINVAL; 1428 break; 1429 } 1430 } 1431 1432 if (!error && mac) { 1433 switch (mac->cri_alg) { 1434 case CRYPTO_MD5: 1435 cs->cs_config |= CESA_CSHD_MD5; 1436 cs->cs_mblen = 1; 1437 cs->cs_hlen = MD5_HASH_LEN; 1438 break; 1439 case CRYPTO_MD5_HMAC: 1440 cs->cs_config |= CESA_CSHD_MD5_HMAC; 1441 cs->cs_mblen = MD5_HMAC_BLOCK_LEN; 1442 cs->cs_hlen = CESA_HMAC_HASH_LENGTH; 1443 break; 1444 case CRYPTO_SHA1: 1445 cs->cs_config |= CESA_CSHD_SHA1; 1446 cs->cs_mblen = 1; 1447 cs->cs_hlen = SHA1_HASH_LEN; 1448 break; 1449 case CRYPTO_SHA1_HMAC: 1450 cs->cs_config |= CESA_CSHD_SHA1_HMAC; 1451 cs->cs_mblen = SHA1_HMAC_BLOCK_LEN; 1452 cs->cs_hlen = CESA_HMAC_HASH_LENGTH; 1453 break; 1454 default: 1455 error = EINVAL; 1456 break; 1457 } 1458 } 1459 1460 /* Save cipher key */ 1461 if (!error && enc && enc->cri_key) { 1462 cs->cs_klen = enc->cri_klen / 8; 1463 memcpy(cs->cs_key, enc->cri_key, cs->cs_klen); 1464 if (enc->cri_alg == CRYPTO_AES_CBC) 1465 error = cesa_prep_aes_key(cs); 1466 } 1467 1468 /* Save digest key */ 1469 if (!error && mac && mac->cri_key) 1470 error = cesa_set_mkey(cs, mac->cri_alg, mac->cri_key, 1471 mac->cri_klen / 8); 1472 1473 if (error) { 1474 cesa_free_session(sc, cs); 1475 return (EINVAL); 1476 } 1477 1478 *sidp = cs->cs_sid; 1479 1480 return (0); 1481} 1482 1483static int 1484cesa_freesession(device_t dev, uint64_t tid) 1485{ 1486 struct cesa_session *cs; 1487 struct cesa_softc *sc; 1488 1489 sc = device_get_softc(dev); 1490 cs = cesa_get_session(sc, CRYPTO_SESID2LID(tid)); 1491 if (!cs) 1492 return (EINVAL); 1493 1494 /* Free session */ 1495 cesa_free_session(sc, cs); 1496 1497 return (0); 1498} 1499 1500static int 1501cesa_process(device_t dev, struct cryptop *crp, int hint) 1502{ 1503 struct cesa_request *cr; 1504 struct cesa_session *cs; 1505 struct cryptodesc *crd; 1506 struct cryptodesc *enc; 1507 struct cryptodesc *mac; 1508 struct cesa_softc *sc; 1509 int error; 1510 1511 sc = device_get_softc(dev); 1512 crd = crp->crp_desc; 1513 enc = NULL; 1514 mac = NULL; 1515 error = 0; 1516 1517 /* Check session ID */ 1518 cs = cesa_get_session(sc, CRYPTO_SESID2LID(crp->crp_sid)); 1519 if (!cs) { 1520 crp->crp_etype = EINVAL; 1521 crypto_done(crp); 1522 return (0); 1523 } 1524 1525 /* Check and parse input */ 1526 if (crp->crp_ilen > CESA_MAX_REQUEST_SIZE) { 1527 crp->crp_etype = E2BIG; 1528 crypto_done(crp); 1529 return (0); 1530 } 1531 1532 if (cesa_is_hash(crd->crd_alg)) 1533 mac = crd; 1534 else 1535 enc = crd; 1536 1537 crd = crd->crd_next; 1538 1539 if (crd) { 1540 if (!enc && !cesa_is_hash(crd->crd_alg)) 1541 enc = crd; 1542 1543 if (!mac && cesa_is_hash(crd->crd_alg)) 1544 mac = crd; 1545 1546 if (crd->crd_next || !(enc && mac)) { 1547 crp->crp_etype = EINVAL; 1548 crypto_done(crp); 1549 return (0); 1550 } 1551 } 1552 1553 /* 1554 * Get request descriptor. Block driver if there is no free 1555 * descriptors in pool. 1556 */ 1557 cr = cesa_alloc_request(sc); 1558 if (!cr) { 1559 CESA_LOCK(sc, sc); 1560 sc->sc_blocked = CRYPTO_SYMQ; 1561 CESA_UNLOCK(sc, sc); 1562 return (ERESTART); 1563 } 1564 1565 /* Prepare request */ 1566 cr->cr_crp = crp; 1567 cr->cr_enc = enc; 1568 cr->cr_mac = mac; 1569 cr->cr_cs = cs; 1570 1571 CESA_LOCK(sc, sessions); 1572 cesa_sync_desc(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1573 1574 if (enc && enc->crd_flags & CRD_F_ENCRYPT) { 1575 if (enc->crd_flags & CRD_F_IV_EXPLICIT) 1576 memcpy(cr->cr_csd->csd_iv, enc->crd_iv, cs->cs_ivlen); 1577 else 1578 arc4rand(cr->cr_csd->csd_iv, cs->cs_ivlen, 0); 1579 1580 if ((enc->crd_flags & CRD_F_IV_PRESENT) == 0) 1581 crypto_copyback(crp->crp_flags, crp->crp_buf, 1582 enc->crd_inject, cs->cs_ivlen, cr->cr_csd->csd_iv); 1583 } else if (enc) { 1584 if (enc->crd_flags & CRD_F_IV_EXPLICIT) 1585 memcpy(cr->cr_csd->csd_iv, enc->crd_iv, cs->cs_ivlen); 1586 else 1587 crypto_copydata(crp->crp_flags, crp->crp_buf, 1588 enc->crd_inject, cs->cs_ivlen, cr->cr_csd->csd_iv); 1589 } 1590 1591 if (enc && enc->crd_flags & CRD_F_KEY_EXPLICIT) { 1592 if ((enc->crd_klen / 8) <= CESA_MAX_KEY_LEN) { 1593 cs->cs_klen = enc->crd_klen / 8; 1594 memcpy(cs->cs_key, enc->crd_key, cs->cs_klen); 1595 if (enc->crd_alg == CRYPTO_AES_CBC) 1596 error = cesa_prep_aes_key(cs); 1597 } else 1598 error = E2BIG; 1599 } 1600 1601 if (!error && mac && mac->crd_flags & CRD_F_KEY_EXPLICIT) { 1602 if ((mac->crd_klen / 8) <= CESA_MAX_MKEY_LEN) 1603 error = cesa_set_mkey(cs, mac->crd_alg, mac->crd_key, 1604 mac->crd_klen / 8); 1605 else 1606 error = E2BIG; 1607 } 1608 1609 /* Convert request to chain of TDMA and SA descriptors */ 1610 if (!error) 1611 error = cesa_create_chain(sc, cr); 1612 1613 cesa_sync_desc(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1614 CESA_UNLOCK(sc, sessions); 1615 1616 if (error) { 1617 cesa_free_request(sc, cr); 1618 crp->crp_etype = error; 1619 crypto_done(crp); 1620 return (0); 1621 } 1622 1623 bus_dmamap_sync(sc->sc_data_dtag, cr->cr_dmap, BUS_DMASYNC_PREREAD | 1624 BUS_DMASYNC_PREWRITE); 1625 1626 /* Enqueue request to execution */ 1627 cesa_enqueue_request(sc, cr); 1628 1629 /* Start execution, if we have no more requests in queue */ 1630 if ((hint & CRYPTO_HINT_MORE) == 0) 1631 cesa_execute(sc); 1632 1633 return (0); 1634} 1635 1636/* 1637 * Set CESA TDMA decode windows. 1638 */ 1639static int 1640decode_win_cesa_setup(struct cesa_softc *sc) 1641{ 1642 struct mem_region availmem_regions[FDT_MEM_REGIONS]; 1643 int availmem_regions_sz; 1644 uint32_t br, cr, i; 1645 1646 /* Grab physical memory regions information from DTS */ 1647 if (fdt_get_mem_regions(availmem_regions, &availmem_regions_sz, 1648 NULL) != 0) 1649 return (ENXIO); 1650 1651 if (availmem_regions_sz > MV_WIN_CESA_MAX) { 1652 device_printf(sc->sc_dev, "Too much memory regions, cannot " 1653 " set CESA windows to cover whole DRAM \n"); 1654 return (ENXIO); 1655 } 1656 1657 /* Disable and clear all CESA windows */ 1658 for (i = 0; i < MV_WIN_CESA_MAX; i++) { 1659 CESA_WRITE(sc, MV_WIN_CESA_BASE(i), 0); 1660 CESA_WRITE(sc, MV_WIN_CESA_CTRL(i), 0); 1661 } 1662 1663 /* Fill CESA TDMA decoding windows with information acquired from DTS */ 1664 for (i = 0; i < availmem_regions_sz; i++) { 1665 br = availmem_regions[i].mr_start; 1666 cr = availmem_regions[i].mr_size; 1667 1668 /* Don't add entries with size lower than 64KB */ 1669 if (cr & 0xffff0000) { 1670 cr = (((cr - 1) & 0xffff0000) | 1671 (MV_WIN_DDR_ATTR(i) << MV_WIN_CPU_ATTR_SHIFT) | 1672 (MV_WIN_DDR_TARGET << MV_WIN_CPU_TARGET_SHIFT) | 1673 MV_WIN_CPU_ENABLE_BIT); 1674 CESA_WRITE(sc, MV_WIN_CESA_BASE(i), br); 1675 CESA_WRITE(sc, MV_WIN_CESA_CTRL(i), cr); 1676 } 1677 } 1678 1679 return (0); 1680} 1681 1682