cesa.c revision 257127
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 257127 2013-10-25 18:38:44Z loos $"); 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 asociated 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 * occured. 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 if (!ofw_bus_is_compatible(dev, "mrvl,cesa")) 976 return (ENXIO); 977 978 device_set_desc(dev, "Marvell Cryptographic Engine and Security " 979 "Accelerator"); 980 981 return (BUS_PROBE_DEFAULT); 982} 983 984static int 985cesa_attach(device_t dev) 986{ 987 struct cesa_softc *sc; 988 uint32_t d, r; 989 int error; 990 int i; 991 992 sc = device_get_softc(dev); 993 sc->sc_blocked = 0; 994 sc->sc_error = 0; 995 sc->sc_dev = dev; 996 997 /* Check if CESA peripheral device has power turned on */ 998 if (soc_power_ctrl_get(CPU_PM_CTRL_CRYPTO) != CPU_PM_CTRL_CRYPTO) { 999 device_printf(dev, "not powered on\n"); 1000 return (ENXIO); 1001 } 1002 1003 soc_id(&d, &r); 1004 1005 switch (d) { 1006 case MV_DEV_88F6281: 1007 case MV_DEV_88F6282: 1008 sc->sc_tperr = 0; 1009 break; 1010 case MV_DEV_MV78100: 1011 case MV_DEV_MV78100_Z0: 1012 sc->sc_tperr = CESA_ICR_TPERR; 1013 break; 1014 default: 1015 return (ENXIO); 1016 } 1017 1018 /* Initialize mutexes */ 1019 mtx_init(&sc->sc_sc_lock, device_get_nameunit(dev), 1020 "CESA Shared Data", MTX_DEF); 1021 mtx_init(&sc->sc_tdesc_lock, device_get_nameunit(dev), 1022 "CESA TDMA Descriptors Pool", MTX_DEF); 1023 mtx_init(&sc->sc_sdesc_lock, device_get_nameunit(dev), 1024 "CESA SA Descriptors Pool", MTX_DEF); 1025 mtx_init(&sc->sc_requests_lock, device_get_nameunit(dev), 1026 "CESA Requests Pool", MTX_DEF); 1027 mtx_init(&sc->sc_sessions_lock, device_get_nameunit(dev), 1028 "CESA Sessions Pool", MTX_DEF); 1029 1030 /* Allocate I/O and IRQ resources */ 1031 error = bus_alloc_resources(dev, cesa_res_spec, sc->sc_res); 1032 if (error) { 1033 device_printf(dev, "could not allocate resources\n"); 1034 goto err0; 1035 } 1036 1037 sc->sc_bsh = rman_get_bushandle(*(sc->sc_res)); 1038 sc->sc_bst = rman_get_bustag(*(sc->sc_res)); 1039 1040 /* Setup CESA decoding windows */ 1041 error = decode_win_cesa_setup(sc); 1042 if (error) { 1043 device_printf(dev, "could not setup decoding windows\n"); 1044 goto err1; 1045 } 1046 1047 /* Acquire SRAM base address */ 1048 error = cesa_setup_sram(sc); 1049 if (error) { 1050 device_printf(dev, "could not setup SRAM\n"); 1051 goto err1; 1052 } 1053 1054 /* Setup interrupt handler */ 1055 error = bus_setup_intr(dev, sc->sc_res[1], INTR_TYPE_NET | INTR_MPSAFE, 1056 NULL, cesa_intr, sc, &(sc->sc_icookie)); 1057 if (error) { 1058 device_printf(dev, "could not setup engine completion irq\n"); 1059 goto err1; 1060 } 1061 1062 /* Create DMA tag for processed data */ 1063 error = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 1064 1, 0, /* alignment, boundary */ 1065 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 1066 BUS_SPACE_MAXADDR, /* highaddr */ 1067 NULL, NULL, /* filtfunc, filtfuncarg */ 1068 CESA_MAX_REQUEST_SIZE, /* maxsize */ 1069 CESA_MAX_FRAGMENTS, /* nsegments */ 1070 CESA_MAX_REQUEST_SIZE, 0, /* maxsegsz, flags */ 1071 NULL, NULL, /* lockfunc, lockfuncarg */ 1072 &sc->sc_data_dtag); /* dmat */ 1073 if (error) 1074 goto err2; 1075 1076 /* Initialize data structures: TDMA Descriptors Pool */ 1077 error = cesa_alloc_dma_mem(sc, &sc->sc_tdesc_cdm, 1078 CESA_TDMA_DESCRIPTORS * sizeof(struct cesa_tdma_hdesc)); 1079 if (error) 1080 goto err3; 1081 1082 STAILQ_INIT(&sc->sc_free_tdesc); 1083 for (i = 0; i < CESA_TDMA_DESCRIPTORS; i++) { 1084 sc->sc_tdesc[i].ctd_cthd = 1085 (struct cesa_tdma_hdesc *)(sc->sc_tdesc_cdm.cdm_vaddr) + i; 1086 sc->sc_tdesc[i].ctd_cthd_paddr = sc->sc_tdesc_cdm.cdm_paddr + 1087 (i * sizeof(struct cesa_tdma_hdesc)); 1088 STAILQ_INSERT_TAIL(&sc->sc_free_tdesc, &sc->sc_tdesc[i], 1089 ctd_stq); 1090 } 1091 1092 /* Initialize data structures: SA Descriptors Pool */ 1093 error = cesa_alloc_dma_mem(sc, &sc->sc_sdesc_cdm, 1094 CESA_SA_DESCRIPTORS * sizeof(struct cesa_sa_hdesc)); 1095 if (error) 1096 goto err4; 1097 1098 STAILQ_INIT(&sc->sc_free_sdesc); 1099 for (i = 0; i < CESA_SA_DESCRIPTORS; i++) { 1100 sc->sc_sdesc[i].csd_cshd = 1101 (struct cesa_sa_hdesc *)(sc->sc_sdesc_cdm.cdm_vaddr) + i; 1102 sc->sc_sdesc[i].csd_cshd_paddr = sc->sc_sdesc_cdm.cdm_paddr + 1103 (i * sizeof(struct cesa_sa_hdesc)); 1104 STAILQ_INSERT_TAIL(&sc->sc_free_sdesc, &sc->sc_sdesc[i], 1105 csd_stq); 1106 } 1107 1108 /* Initialize data structures: Requests Pool */ 1109 error = cesa_alloc_dma_mem(sc, &sc->sc_requests_cdm, 1110 CESA_REQUESTS * sizeof(struct cesa_sa_data)); 1111 if (error) 1112 goto err5; 1113 1114 STAILQ_INIT(&sc->sc_free_requests); 1115 STAILQ_INIT(&sc->sc_ready_requests); 1116 STAILQ_INIT(&sc->sc_queued_requests); 1117 for (i = 0; i < CESA_REQUESTS; i++) { 1118 sc->sc_requests[i].cr_csd = 1119 (struct cesa_sa_data *)(sc->sc_requests_cdm.cdm_vaddr) + i; 1120 sc->sc_requests[i].cr_csd_paddr = 1121 sc->sc_requests_cdm.cdm_paddr + 1122 (i * sizeof(struct cesa_sa_data)); 1123 1124 /* Preallocate DMA maps */ 1125 error = bus_dmamap_create(sc->sc_data_dtag, 0, 1126 &sc->sc_requests[i].cr_dmap); 1127 if (error && i > 0) { 1128 i--; 1129 do { 1130 bus_dmamap_destroy(sc->sc_data_dtag, 1131 sc->sc_requests[i].cr_dmap); 1132 } while (i--); 1133 1134 goto err6; 1135 } 1136 1137 STAILQ_INSERT_TAIL(&sc->sc_free_requests, &sc->sc_requests[i], 1138 cr_stq); 1139 } 1140 1141 /* Initialize data structures: Sessions Pool */ 1142 STAILQ_INIT(&sc->sc_free_sessions); 1143 for (i = 0; i < CESA_SESSIONS; i++) { 1144 sc->sc_sessions[i].cs_sid = i; 1145 STAILQ_INSERT_TAIL(&sc->sc_free_sessions, &sc->sc_sessions[i], 1146 cs_stq); 1147 } 1148 1149 /* 1150 * Initialize TDMA: 1151 * - Burst limit: 128 bytes, 1152 * - Outstanding reads enabled, 1153 * - No byte-swap. 1154 */ 1155 CESA_WRITE(sc, CESA_TDMA_CR, CESA_TDMA_CR_DBL128 | CESA_TDMA_CR_SBL128 | 1156 CESA_TDMA_CR_ORDEN | CESA_TDMA_CR_NBS | CESA_TDMA_CR_ENABLE); 1157 1158 /* 1159 * Initialize SA: 1160 * - SA descriptor is present at beginning of CESA SRAM, 1161 * - Multi-packet chain mode, 1162 * - Cooperation with TDMA enabled. 1163 */ 1164 CESA_WRITE(sc, CESA_SA_DPR, 0); 1165 CESA_WRITE(sc, CESA_SA_CR, CESA_SA_CR_ACTIVATE_TDMA | 1166 CESA_SA_CR_WAIT_FOR_TDMA | CESA_SA_CR_MULTI_MODE); 1167 1168 /* Unmask interrupts */ 1169 CESA_WRITE(sc, CESA_ICR, 0); 1170 CESA_WRITE(sc, CESA_ICM, CESA_ICM_ACCTDMA | sc->sc_tperr); 1171 CESA_WRITE(sc, CESA_TDMA_ECR, 0); 1172 CESA_WRITE(sc, CESA_TDMA_EMR, CESA_TDMA_EMR_MISS | 1173 CESA_TDMA_EMR_DOUBLE_HIT | CESA_TDMA_EMR_BOTH_HIT | 1174 CESA_TDMA_EMR_DATA_ERROR); 1175 1176 /* Register in OCF */ 1177 sc->sc_cid = crypto_get_driverid(dev, CRYPTOCAP_F_HARDWARE); 1178 if (sc->sc_cid) { 1179 device_printf(dev, "could not get crypto driver id\n"); 1180 goto err7; 1181 } 1182 1183 crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0); 1184 crypto_register(sc->sc_cid, CRYPTO_DES_CBC, 0, 0); 1185 crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0); 1186 crypto_register(sc->sc_cid, CRYPTO_MD5, 0, 0); 1187 crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0); 1188 crypto_register(sc->sc_cid, CRYPTO_SHA1, 0, 0); 1189 crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0); 1190 1191 return (0); 1192err7: 1193 for (i = 0; i < CESA_REQUESTS; i++) 1194 bus_dmamap_destroy(sc->sc_data_dtag, 1195 sc->sc_requests[i].cr_dmap); 1196err6: 1197 cesa_free_dma_mem(&sc->sc_requests_cdm); 1198err5: 1199 cesa_free_dma_mem(&sc->sc_sdesc_cdm); 1200err4: 1201 cesa_free_dma_mem(&sc->sc_tdesc_cdm); 1202err3: 1203 bus_dma_tag_destroy(sc->sc_data_dtag); 1204err2: 1205 bus_teardown_intr(dev, sc->sc_res[1], sc->sc_icookie); 1206err1: 1207 bus_release_resources(dev, cesa_res_spec, sc->sc_res); 1208err0: 1209 mtx_destroy(&sc->sc_sessions_lock); 1210 mtx_destroy(&sc->sc_requests_lock); 1211 mtx_destroy(&sc->sc_sdesc_lock); 1212 mtx_destroy(&sc->sc_tdesc_lock); 1213 mtx_destroy(&sc->sc_sc_lock); 1214 return (ENXIO); 1215} 1216 1217static int 1218cesa_detach(device_t dev) 1219{ 1220 struct cesa_softc *sc; 1221 int i; 1222 1223 sc = device_get_softc(dev); 1224 1225 /* TODO: Wait for queued requests completion before shutdown. */ 1226 1227 /* Mask interrupts */ 1228 CESA_WRITE(sc, CESA_ICM, 0); 1229 CESA_WRITE(sc, CESA_TDMA_EMR, 0); 1230 1231 /* Unregister from OCF */ 1232 crypto_unregister_all(sc->sc_cid); 1233 1234 /* Free DMA Maps */ 1235 for (i = 0; i < CESA_REQUESTS; i++) 1236 bus_dmamap_destroy(sc->sc_data_dtag, 1237 sc->sc_requests[i].cr_dmap); 1238 1239 /* Free DMA Memory */ 1240 cesa_free_dma_mem(&sc->sc_requests_cdm); 1241 cesa_free_dma_mem(&sc->sc_sdesc_cdm); 1242 cesa_free_dma_mem(&sc->sc_tdesc_cdm); 1243 1244 /* Free DMA Tag */ 1245 bus_dma_tag_destroy(sc->sc_data_dtag); 1246 1247 /* Stop interrupt */ 1248 bus_teardown_intr(dev, sc->sc_res[1], sc->sc_icookie); 1249 1250 /* Relase I/O and IRQ resources */ 1251 bus_release_resources(dev, cesa_res_spec, sc->sc_res); 1252 1253 /* Destory mutexes */ 1254 mtx_destroy(&sc->sc_sessions_lock); 1255 mtx_destroy(&sc->sc_requests_lock); 1256 mtx_destroy(&sc->sc_sdesc_lock); 1257 mtx_destroy(&sc->sc_tdesc_lock); 1258 mtx_destroy(&sc->sc_sc_lock); 1259 1260 return (0); 1261} 1262 1263static void 1264cesa_intr(void *arg) 1265{ 1266 STAILQ_HEAD(, cesa_request) requests; 1267 struct cesa_request *cr, *tmp; 1268 struct cesa_softc *sc; 1269 uint32_t ecr, icr; 1270 int blocked; 1271 1272 sc = arg; 1273 1274 /* Ack interrupt */ 1275 ecr = CESA_READ(sc, CESA_TDMA_ECR); 1276 CESA_WRITE(sc, CESA_TDMA_ECR, 0); 1277 icr = CESA_READ(sc, CESA_ICR); 1278 CESA_WRITE(sc, CESA_ICR, 0); 1279 1280 /* Check for TDMA errors */ 1281 if (ecr & CESA_TDMA_ECR_MISS) { 1282 device_printf(sc->sc_dev, "TDMA Miss error detected!\n"); 1283 sc->sc_error = EIO; 1284 } 1285 1286 if (ecr & CESA_TDMA_ECR_DOUBLE_HIT) { 1287 device_printf(sc->sc_dev, "TDMA Double Hit error detected!\n"); 1288 sc->sc_error = EIO; 1289 } 1290 1291 if (ecr & CESA_TDMA_ECR_BOTH_HIT) { 1292 device_printf(sc->sc_dev, "TDMA Both Hit error detected!\n"); 1293 sc->sc_error = EIO; 1294 } 1295 1296 if (ecr & CESA_TDMA_ECR_DATA_ERROR) { 1297 device_printf(sc->sc_dev, "TDMA Data error detected!\n"); 1298 sc->sc_error = EIO; 1299 } 1300 1301 /* Check for CESA errors */ 1302 if (icr & sc->sc_tperr) { 1303 device_printf(sc->sc_dev, "CESA SRAM Parity error detected!\n"); 1304 sc->sc_error = EIO; 1305 } 1306 1307 /* If there is nothing more to do, return */ 1308 if ((icr & CESA_ICR_ACCTDMA) == 0) 1309 return; 1310 1311 /* Get all finished requests */ 1312 CESA_LOCK(sc, requests); 1313 STAILQ_INIT(&requests); 1314 STAILQ_CONCAT(&requests, &sc->sc_queued_requests); 1315 STAILQ_INIT(&sc->sc_queued_requests); 1316 CESA_UNLOCK(sc, requests); 1317 1318 /* Execute all ready requests */ 1319 cesa_execute(sc); 1320 1321 /* Process completed requests */ 1322 cesa_sync_dma_mem(&sc->sc_requests_cdm, BUS_DMASYNC_POSTREAD | 1323 BUS_DMASYNC_POSTWRITE); 1324 1325 STAILQ_FOREACH_SAFE(cr, &requests, cr_stq, tmp) { 1326 bus_dmamap_sync(sc->sc_data_dtag, cr->cr_dmap, 1327 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1328 1329 cr->cr_crp->crp_etype = sc->sc_error; 1330 if (cr->cr_mac) 1331 crypto_copyback(cr->cr_crp->crp_flags, 1332 cr->cr_crp->crp_buf, cr->cr_mac->crd_inject, 1333 cr->cr_cs->cs_hlen, cr->cr_csd->csd_hash); 1334 1335 crypto_done(cr->cr_crp); 1336 cesa_free_request(sc, cr); 1337 } 1338 1339 cesa_sync_dma_mem(&sc->sc_requests_cdm, BUS_DMASYNC_PREREAD | 1340 BUS_DMASYNC_PREWRITE); 1341 1342 sc->sc_error = 0; 1343 1344 /* Unblock driver if it ran out of resources */ 1345 CESA_LOCK(sc, sc); 1346 blocked = sc->sc_blocked; 1347 sc->sc_blocked = 0; 1348 CESA_UNLOCK(sc, sc); 1349 1350 if (blocked) 1351 crypto_unblock(sc->sc_cid, blocked); 1352} 1353 1354static int 1355cesa_newsession(device_t dev, uint32_t *sidp, struct cryptoini *cri) 1356{ 1357 struct cesa_session *cs; 1358 struct cesa_softc *sc; 1359 struct cryptoini *enc; 1360 struct cryptoini *mac; 1361 int error; 1362 1363 sc = device_get_softc(dev); 1364 enc = NULL; 1365 mac = NULL; 1366 error = 0; 1367 1368 /* Check and parse input */ 1369 if (cesa_is_hash(cri->cri_alg)) 1370 mac = cri; 1371 else 1372 enc = cri; 1373 1374 cri = cri->cri_next; 1375 1376 if (cri) { 1377 if (!enc && !cesa_is_hash(cri->cri_alg)) 1378 enc = cri; 1379 1380 if (!mac && cesa_is_hash(cri->cri_alg)) 1381 mac = cri; 1382 1383 if (cri->cri_next || !(enc && mac)) 1384 return (EINVAL); 1385 } 1386 1387 if ((enc && (enc->cri_klen / 8) > CESA_MAX_KEY_LEN) || 1388 (mac && (mac->cri_klen / 8) > CESA_MAX_MKEY_LEN)) 1389 return (E2BIG); 1390 1391 /* Allocate session */ 1392 cs = cesa_alloc_session(sc); 1393 if (!cs) 1394 return (ENOMEM); 1395 1396 /* Prepare CESA configuration */ 1397 cs->cs_config = 0; 1398 cs->cs_ivlen = 1; 1399 cs->cs_mblen = 1; 1400 1401 if (enc) { 1402 switch (enc->cri_alg) { 1403 case CRYPTO_AES_CBC: 1404 cs->cs_config |= CESA_CSHD_AES | CESA_CSHD_CBC; 1405 cs->cs_ivlen = AES_BLOCK_LEN; 1406 break; 1407 case CRYPTO_DES_CBC: 1408 cs->cs_config |= CESA_CSHD_DES | CESA_CSHD_CBC; 1409 cs->cs_ivlen = DES_BLOCK_LEN; 1410 break; 1411 case CRYPTO_3DES_CBC: 1412 cs->cs_config |= CESA_CSHD_3DES | CESA_CSHD_3DES_EDE | 1413 CESA_CSHD_CBC; 1414 cs->cs_ivlen = DES3_BLOCK_LEN; 1415 break; 1416 default: 1417 error = EINVAL; 1418 break; 1419 } 1420 } 1421 1422 if (!error && mac) { 1423 switch (mac->cri_alg) { 1424 case CRYPTO_MD5: 1425 cs->cs_config |= CESA_CSHD_MD5; 1426 cs->cs_mblen = 1; 1427 cs->cs_hlen = MD5_HASH_LEN; 1428 break; 1429 case CRYPTO_MD5_HMAC: 1430 cs->cs_config |= CESA_CSHD_MD5_HMAC; 1431 cs->cs_mblen = MD5_HMAC_BLOCK_LEN; 1432 cs->cs_hlen = CESA_HMAC_HASH_LENGTH; 1433 break; 1434 case CRYPTO_SHA1: 1435 cs->cs_config |= CESA_CSHD_SHA1; 1436 cs->cs_mblen = 1; 1437 cs->cs_hlen = SHA1_HASH_LEN; 1438 break; 1439 case CRYPTO_SHA1_HMAC: 1440 cs->cs_config |= CESA_CSHD_SHA1_HMAC; 1441 cs->cs_mblen = SHA1_HMAC_BLOCK_LEN; 1442 cs->cs_hlen = CESA_HMAC_HASH_LENGTH; 1443 break; 1444 default: 1445 error = EINVAL; 1446 break; 1447 } 1448 } 1449 1450 /* Save cipher key */ 1451 if (!error && enc && enc->cri_key) { 1452 cs->cs_klen = enc->cri_klen / 8; 1453 memcpy(cs->cs_key, enc->cri_key, cs->cs_klen); 1454 if (enc->cri_alg == CRYPTO_AES_CBC) 1455 error = cesa_prep_aes_key(cs); 1456 } 1457 1458 /* Save digest key */ 1459 if (!error && mac && mac->cri_key) 1460 error = cesa_set_mkey(cs, mac->cri_alg, mac->cri_key, 1461 mac->cri_klen / 8); 1462 1463 if (error) { 1464 cesa_free_session(sc, cs); 1465 return (EINVAL); 1466 } 1467 1468 *sidp = cs->cs_sid; 1469 1470 return (0); 1471} 1472 1473static int 1474cesa_freesession(device_t dev, uint64_t tid) 1475{ 1476 struct cesa_session *cs; 1477 struct cesa_softc *sc; 1478 1479 sc = device_get_softc(dev); 1480 cs = cesa_get_session(sc, CRYPTO_SESID2LID(tid)); 1481 if (!cs) 1482 return (EINVAL); 1483 1484 /* Free session */ 1485 cesa_free_session(sc, cs); 1486 1487 return (0); 1488} 1489 1490static int 1491cesa_process(device_t dev, struct cryptop *crp, int hint) 1492{ 1493 struct cesa_request *cr; 1494 struct cesa_session *cs; 1495 struct cryptodesc *crd; 1496 struct cryptodesc *enc; 1497 struct cryptodesc *mac; 1498 struct cesa_softc *sc; 1499 int error; 1500 1501 sc = device_get_softc(dev); 1502 crd = crp->crp_desc; 1503 enc = NULL; 1504 mac = NULL; 1505 error = 0; 1506 1507 /* Check session ID */ 1508 cs = cesa_get_session(sc, CRYPTO_SESID2LID(crp->crp_sid)); 1509 if (!cs) { 1510 crp->crp_etype = EINVAL; 1511 crypto_done(crp); 1512 return (0); 1513 } 1514 1515 /* Check and parse input */ 1516 if (crp->crp_ilen > CESA_MAX_REQUEST_SIZE) { 1517 crp->crp_etype = E2BIG; 1518 crypto_done(crp); 1519 return (0); 1520 } 1521 1522 if (cesa_is_hash(crd->crd_alg)) 1523 mac = crd; 1524 else 1525 enc = crd; 1526 1527 crd = crd->crd_next; 1528 1529 if (crd) { 1530 if (!enc && !cesa_is_hash(crd->crd_alg)) 1531 enc = crd; 1532 1533 if (!mac && cesa_is_hash(crd->crd_alg)) 1534 mac = crd; 1535 1536 if (crd->crd_next || !(enc && mac)) { 1537 crp->crp_etype = EINVAL; 1538 crypto_done(crp); 1539 return (0); 1540 } 1541 } 1542 1543 /* 1544 * Get request descriptor. Block driver if there is no free 1545 * descriptors in pool. 1546 */ 1547 cr = cesa_alloc_request(sc); 1548 if (!cr) { 1549 CESA_LOCK(sc, sc); 1550 sc->sc_blocked = CRYPTO_SYMQ; 1551 CESA_UNLOCK(sc, sc); 1552 return (ERESTART); 1553 } 1554 1555 /* Prepare request */ 1556 cr->cr_crp = crp; 1557 cr->cr_enc = enc; 1558 cr->cr_mac = mac; 1559 cr->cr_cs = cs; 1560 1561 CESA_LOCK(sc, sessions); 1562 cesa_sync_desc(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1563 1564 if (enc && enc->crd_flags & CRD_F_ENCRYPT) { 1565 if (enc->crd_flags & CRD_F_IV_EXPLICIT) 1566 memcpy(cr->cr_csd->csd_iv, enc->crd_iv, cs->cs_ivlen); 1567 else 1568 arc4rand(cr->cr_csd->csd_iv, cs->cs_ivlen, 0); 1569 1570 if ((enc->crd_flags & CRD_F_IV_PRESENT) == 0) 1571 crypto_copyback(crp->crp_flags, crp->crp_buf, 1572 enc->crd_inject, cs->cs_ivlen, cr->cr_csd->csd_iv); 1573 } else if (enc) { 1574 if (enc->crd_flags & CRD_F_IV_EXPLICIT) 1575 memcpy(cr->cr_csd->csd_iv, enc->crd_iv, cs->cs_ivlen); 1576 else 1577 crypto_copydata(crp->crp_flags, crp->crp_buf, 1578 enc->crd_inject, cs->cs_ivlen, cr->cr_csd->csd_iv); 1579 } 1580 1581 if (enc && enc->crd_flags & CRD_F_KEY_EXPLICIT) { 1582 if ((enc->crd_klen / 8) <= CESA_MAX_KEY_LEN) { 1583 cs->cs_klen = enc->crd_klen / 8; 1584 memcpy(cs->cs_key, enc->crd_key, cs->cs_klen); 1585 if (enc->crd_alg == CRYPTO_AES_CBC) 1586 error = cesa_prep_aes_key(cs); 1587 } else 1588 error = E2BIG; 1589 } 1590 1591 if (!error && mac && mac->crd_flags & CRD_F_KEY_EXPLICIT) { 1592 if ((mac->crd_klen / 8) <= CESA_MAX_MKEY_LEN) 1593 error = cesa_set_mkey(cs, mac->crd_alg, mac->crd_key, 1594 mac->crd_klen / 8); 1595 else 1596 error = E2BIG; 1597 } 1598 1599 /* Convert request to chain of TDMA and SA descriptors */ 1600 if (!error) 1601 error = cesa_create_chain(sc, cr); 1602 1603 cesa_sync_desc(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1604 CESA_UNLOCK(sc, sessions); 1605 1606 if (error) { 1607 cesa_free_request(sc, cr); 1608 crp->crp_etype = error; 1609 crypto_done(crp); 1610 return (0); 1611 } 1612 1613 bus_dmamap_sync(sc->sc_data_dtag, cr->cr_dmap, BUS_DMASYNC_PREREAD | 1614 BUS_DMASYNC_PREWRITE); 1615 1616 /* Enqueue request to execution */ 1617 cesa_enqueue_request(sc, cr); 1618 1619 /* Start execution, if we have no more requests in queue */ 1620 if ((hint & CRYPTO_HINT_MORE) == 0) 1621 cesa_execute(sc); 1622 1623 return (0); 1624} 1625 1626/* 1627 * Set CESA TDMA decode windows. 1628 */ 1629static int 1630decode_win_cesa_setup(struct cesa_softc *sc) 1631{ 1632 struct mem_region availmem_regions[FDT_MEM_REGIONS]; 1633 int availmem_regions_sz; 1634 uint32_t memsize, br, cr, i; 1635 1636 /* Grab physical memory regions information from DTS */ 1637 if (fdt_get_mem_regions(availmem_regions, &availmem_regions_sz, 1638 &memsize) != 0) 1639 return (ENXIO); 1640 1641 if (availmem_regions_sz > MV_WIN_CESA_MAX) { 1642 device_printf(sc->sc_dev, "Too much memory regions, cannot " 1643 " set CESA windows to cover whole DRAM \n"); 1644 return (ENXIO); 1645 } 1646 1647 /* Disable and clear all CESA windows */ 1648 for (i = 0; i < MV_WIN_CESA_MAX; i++) { 1649 CESA_WRITE(sc, MV_WIN_CESA_BASE(i), 0); 1650 CESA_WRITE(sc, MV_WIN_CESA_CTRL(i), 0); 1651 } 1652 1653 /* Fill CESA TDMA decoding windows with information acquired from DTS */ 1654 for (i = 0; i < availmem_regions_sz; i++) { 1655 br = availmem_regions[i].mr_start; 1656 cr = availmem_regions[i].mr_size; 1657 1658 /* Don't add entries with size lower than 64KB */ 1659 if (cr & 0xffff0000) { 1660 cr = (((cr - 1) & 0xffff0000) | 1661 (MV_WIN_DDR_ATTR(i) << MV_WIN_CPU_ATTR_SHIFT) | 1662 (MV_WIN_DDR_TARGET << MV_WIN_CPU_TARGET_SHIFT) | 1663 MV_WIN_CPU_ENABLE_BIT); 1664 CESA_WRITE(sc, MV_WIN_CESA_BASE(i), br); 1665 CESA_WRITE(sc, MV_WIN_CESA_CTRL(i), cr); 1666 } 1667 } 1668 1669 return (0); 1670} 1671 1672