1 /*- 2 * Copyright (c) 2003 Sam Leffler, Errno Consulting 3 * Copyright (c) 2003 Global Technology Associates, Inc. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: src/sys/dev/safe/safe.c,v 1.22 2011/06/12 23:33:08 delphij Exp $ 28 */ 29 30 /* 31 * SafeNet SafeXcel-1141 hardware crypto accelerator 32 */ 33 #include "opt_safe.h" 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/proc.h> 38 #include <sys/errno.h> 39 #include <sys/malloc.h> 40 #include <sys/kernel.h> 41 #include <sys/mbuf.h> 42 #include <sys/module.h> 43 #include <sys/lock.h> 44 #include <sys/sysctl.h> 45 #include <sys/endian.h> 46 47 #include <vm/vm.h> 48 #include <vm/pmap.h> 49 50 #include <sys/bus.h> 51 #include <sys/rman.h> 52 53 #include <crypto/sha1.h> 54 #include <opencrypto/cryptodev.h> 55 #include <opencrypto/cryptosoft.h> 56 #include <sys/md5.h> 57 #include <sys/random.h> 58 #include <sys/kobj.h> 59 60 #include "cryptodev_if.h" 61 62 #include <bus/pci/pcivar.h> 63 #include <bus/pci/pcireg.h> 64 65 #ifdef SAFE_RNDTEST 66 #include <dev/crypto/rndtest/rndtest.h> 67 #endif 68 #include <dev/crypto/safe/safereg.h> 69 #include <dev/crypto/safe/safevar.h> 70 71 #ifndef bswap32 72 #define bswap32 NTOHL 73 #endif 74 75 /* 76 * Prototypes and count for the pci_device structure 77 */ 78 static int safe_probe(device_t); 79 static int safe_attach(device_t); 80 static int safe_detach(device_t); 81 static int safe_suspend(device_t); 82 static int safe_resume(device_t); 83 static int safe_shutdown(device_t); 84 85 static int safe_newsession(device_t, u_int32_t *, struct cryptoini *); 86 static int safe_freesession(device_t, u_int64_t); 87 static int safe_process(device_t, struct cryptop *, int); 88 89 static device_method_t safe_methods[] = { 90 /* Device interface */ 91 DEVMETHOD(device_probe, safe_probe), 92 DEVMETHOD(device_attach, safe_attach), 93 DEVMETHOD(device_detach, safe_detach), 94 DEVMETHOD(device_suspend, safe_suspend), 95 DEVMETHOD(device_resume, safe_resume), 96 DEVMETHOD(device_shutdown, safe_shutdown), 97 98 /* bus interface */ 99 DEVMETHOD(bus_print_child, bus_generic_print_child), 100 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 101 102 /* crypto device methods */ 103 DEVMETHOD(cryptodev_newsession, safe_newsession), 104 DEVMETHOD(cryptodev_freesession,safe_freesession), 105 DEVMETHOD(cryptodev_process, safe_process), 106 107 DEVMETHOD_END 108 }; 109 static driver_t safe_driver = { 110 "safe", 111 safe_methods, 112 sizeof (struct safe_softc) 113 }; 114 static devclass_t safe_devclass; 115 116 DRIVER_MODULE(safe, pci, safe_driver, safe_devclass, NULL, NULL); 117 MODULE_DEPEND(safe, crypto, 1, 1, 1); 118 #ifdef SAFE_RNDTEST 119 MODULE_DEPEND(safe, rndtest, 1, 1, 1); 120 #endif 121 122 static void safe_intr(void *); 123 static void safe_callback(struct safe_softc *, struct safe_ringentry *); 124 static void safe_feed(struct safe_softc *, struct safe_ringentry *); 125 static void safe_mcopy(struct mbuf *, struct mbuf *, u_int); 126 #ifndef SAFE_NO_RNG 127 static void safe_rng_init(struct safe_softc *); 128 static void safe_rng(void *); 129 #endif /* SAFE_NO_RNG */ 130 static int safe_dma_malloc(struct safe_softc *, bus_size_t, 131 struct safe_dma_alloc *, int); 132 #define safe_dma_sync(_dma, _flags) \ 133 bus_dmamap_sync((_dma)->dma_tag, (_dma)->dma_map, (_flags)) 134 static void safe_dma_free(struct safe_softc *, struct safe_dma_alloc *); 135 static int safe_dmamap_aligned(const struct safe_operand *); 136 static int safe_dmamap_uniform(const struct safe_operand *); 137 138 static void safe_reset_board(struct safe_softc *); 139 static void safe_init_board(struct safe_softc *); 140 static void safe_init_pciregs(device_t dev); 141 static void safe_cleanchip(struct safe_softc *); 142 static void safe_totalreset(struct safe_softc *); 143 144 static int safe_free_entry(struct safe_softc *, struct safe_ringentry *); 145 146 SYSCTL_NODE(_hw, OID_AUTO, safe, CTLFLAG_RD, 0, "SafeNet driver parameters"); 147 148 #ifdef SAFE_DEBUG 149 static void safe_dump_dmastatus(struct safe_softc *, const char *); 150 static void safe_dump_ringstate(struct safe_softc *, const char *); 151 static void safe_dump_intrstate(struct safe_softc *, const char *); 152 static void safe_dump_request(struct safe_softc *, const char *, 153 struct safe_ringentry *); 154 155 static struct safe_softc *safec; /* for use by hw.safe.dump */ 156 157 static int safe_debug = 0; 158 SYSCTL_INT(_hw_safe, OID_AUTO, debug, CTLFLAG_RW, &safe_debug, 159 0, "control debugging msgs"); 160 #define DPRINTF(_x) if (safe_debug) kprintf _x 161 #else 162 #define DPRINTF(_x) 163 #endif 164 165 #define READ_REG(sc,r) \ 166 bus_space_read_4((sc)->sc_st, (sc)->sc_sh, (r)) 167 168 #define WRITE_REG(sc,reg,val) \ 169 bus_space_write_4((sc)->sc_st, (sc)->sc_sh, reg, val) 170 171 struct safe_stats safestats; 172 SYSCTL_STRUCT(_hw_safe, OID_AUTO, stats, CTLFLAG_RD, &safestats, 173 safe_stats, "driver statistics"); 174 #ifndef SAFE_NO_RNG 175 static int safe_rnginterval = 1; /* poll once a second */ 176 SYSCTL_INT(_hw_safe, OID_AUTO, rnginterval, CTLFLAG_RW, &safe_rnginterval, 177 0, "RNG polling interval (secs)"); 178 static int safe_rngbufsize = 16; /* 64 bytes each poll */ 179 SYSCTL_INT(_hw_safe, OID_AUTO, rngbufsize, CTLFLAG_RW, &safe_rngbufsize, 180 0, "RNG polling buffer size (32-bit words)"); 181 static int safe_rngmaxalarm = 8; /* max alarms before reset */ 182 SYSCTL_INT(_hw_safe, OID_AUTO, rngmaxalarm, CTLFLAG_RW, &safe_rngmaxalarm, 183 0, "RNG max alarms before reset"); 184 #endif /* SAFE_NO_RNG */ 185 186 static int 187 safe_probe(device_t dev) 188 { 189 if (pci_get_vendor(dev) == PCI_VENDOR_SAFENET && 190 pci_get_device(dev) == PCI_PRODUCT_SAFEXCEL) 191 return (BUS_PROBE_DEFAULT); 192 return (ENXIO); 193 } 194 195 static const char* 196 safe_partname(struct safe_softc *sc) 197 { 198 /* XXX sprintf numbers when not decoded */ 199 switch (pci_get_vendor(sc->sc_dev)) { 200 case PCI_VENDOR_SAFENET: 201 switch (pci_get_device(sc->sc_dev)) { 202 case PCI_PRODUCT_SAFEXCEL: return "SafeNet SafeXcel-1141"; 203 } 204 return "SafeNet unknown-part"; 205 } 206 return "Unknown-vendor unknown-part"; 207 } 208 209 #ifndef SAFE_NO_RNG 210 static void 211 default_harvest(struct rndtest_state *rsp, void *buf, u_int count) 212 { 213 uint32_t *p = (uint32_t *)buf; 214 215 for (count /= sizeof(uint32_t); count; count--) 216 add_true_randomness(*p++); 217 } 218 #endif /* SAFE_NO_RNG */ 219 220 static int 221 safe_attach(device_t dev) 222 { 223 struct safe_softc *sc = device_get_softc(dev); 224 u_int32_t raddr; 225 u_int32_t cmd, i, devinfo; 226 int rid; 227 228 bzero(sc, sizeof (*sc)); 229 sc->sc_dev = dev; 230 231 /* XXX handle power management */ 232 233 cmd = pci_read_config(dev, PCIR_COMMAND, 4); 234 cmd |= PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN; 235 pci_write_config(dev, PCIR_COMMAND, cmd, 4); 236 cmd = pci_read_config(dev, PCIR_COMMAND, 4); 237 238 if (!(cmd & PCIM_CMD_MEMEN)) { 239 device_printf(dev, "failed to enable memory mapping\n"); 240 goto bad; 241 } 242 243 if (!(cmd & PCIM_CMD_BUSMASTEREN)) { 244 device_printf(dev, "failed to enable bus mastering\n"); 245 goto bad; 246 } 247 248 /* 249 * Setup memory-mapping of PCI registers. 250 */ 251 rid = BS_BAR; 252 sc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 253 RF_ACTIVE); 254 if (sc->sc_sr == NULL) { 255 device_printf(dev, "cannot map register space\n"); 256 goto bad; 257 } 258 sc->sc_st = rman_get_bustag(sc->sc_sr); 259 sc->sc_sh = rman_get_bushandle(sc->sc_sr); 260 261 /* 262 * Arrange interrupt line. 263 */ 264 rid = 0; 265 sc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 266 RF_SHAREABLE|RF_ACTIVE); 267 if (sc->sc_irq == NULL) { 268 device_printf(dev, "could not map interrupt\n"); 269 goto bad1; 270 } 271 /* 272 * NB: Network code assumes we are blocked with splimp() 273 * so make sure the IRQ is mapped appropriately. 274 */ 275 if (bus_setup_intr(dev, sc->sc_irq, INTR_MPSAFE, 276 safe_intr, sc, &sc->sc_ih, NULL)) { 277 device_printf(dev, "could not establish interrupt\n"); 278 goto bad2; 279 } 280 281 sc->sc_cid = crypto_get_driverid(dev, CRYPTOCAP_F_HARDWARE); 282 if (sc->sc_cid < 0) { 283 device_printf(dev, "could not get crypto driver id\n"); 284 goto bad3; 285 } 286 287 sc->sc_chiprev = READ_REG(sc, SAFE_DEVINFO) & 288 (SAFE_DEVINFO_REV_MAJ | SAFE_DEVINFO_REV_MIN); 289 290 /* 291 * Setup DMA descriptor area. 292 */ 293 if (bus_dma_tag_create(NULL, /* parent */ 294 1, /* alignment */ 295 SAFE_DMA_BOUNDARY, /* boundary */ 296 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 297 BUS_SPACE_MAXADDR, /* highaddr */ 298 NULL, NULL, /* filter, filterarg */ 299 SAFE_MAX_DMA, /* maxsize */ 300 SAFE_MAX_PART, /* nsegments */ 301 SAFE_MAX_SSIZE, /* maxsegsize */ 302 BUS_DMA_ALLOCNOW, /* flags */ 303 &sc->sc_srcdmat)) { 304 device_printf(dev, "cannot allocate DMA tag\n"); 305 goto bad4; 306 } 307 if (bus_dma_tag_create(NULL, /* parent */ 308 1, /* alignment */ 309 SAFE_MAX_DSIZE, /* boundary */ 310 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 311 BUS_SPACE_MAXADDR, /* highaddr */ 312 NULL, NULL, /* filter, filterarg */ 313 SAFE_MAX_DMA, /* maxsize */ 314 SAFE_MAX_PART, /* nsegments */ 315 SAFE_MAX_DSIZE, /* maxsegsize */ 316 BUS_DMA_ALLOCNOW, /* flags */ 317 &sc->sc_dstdmat)) { 318 device_printf(dev, "cannot allocate DMA tag\n"); 319 goto bad4; 320 } 321 322 /* 323 * Allocate packet engine descriptors. 324 */ 325 if (safe_dma_malloc(sc, 326 SAFE_MAX_NQUEUE * sizeof (struct safe_ringentry), 327 &sc->sc_ringalloc, 0)) { 328 device_printf(dev, "cannot allocate PE descriptor ring\n"); 329 bus_dma_tag_destroy(sc->sc_srcdmat); 330 goto bad4; 331 } 332 /* 333 * Hookup the static portion of all our data structures. 334 */ 335 sc->sc_ring = (struct safe_ringentry *) sc->sc_ringalloc.dma_vaddr; 336 sc->sc_ringtop = sc->sc_ring + SAFE_MAX_NQUEUE; 337 sc->sc_front = sc->sc_ring; 338 sc->sc_back = sc->sc_ring; 339 raddr = sc->sc_ringalloc.dma_paddr; 340 bzero(sc->sc_ring, SAFE_MAX_NQUEUE * sizeof(struct safe_ringentry)); 341 for (i = 0; i < SAFE_MAX_NQUEUE; i++) { 342 struct safe_ringentry *re = &sc->sc_ring[i]; 343 344 re->re_desc.d_sa = raddr + 345 offsetof(struct safe_ringentry, re_sa); 346 re->re_sa.sa_staterec = raddr + 347 offsetof(struct safe_ringentry, re_sastate); 348 349 raddr += sizeof (struct safe_ringentry); 350 } 351 lockinit(&sc->sc_ringlock, "packet engine ring", 0, LK_CANRECURSE); 352 353 /* 354 * Allocate scatter and gather particle descriptors. 355 */ 356 if (safe_dma_malloc(sc, SAFE_TOTAL_SPART * sizeof (struct safe_pdesc), 357 &sc->sc_spalloc, 0)) { 358 device_printf(dev, "cannot allocate source particle " 359 "descriptor ring\n"); 360 lockuninit(&sc->sc_ringlock); 361 safe_dma_free(sc, &sc->sc_ringalloc); 362 bus_dma_tag_destroy(sc->sc_srcdmat); 363 goto bad4; 364 } 365 sc->sc_spring = (struct safe_pdesc *) sc->sc_spalloc.dma_vaddr; 366 sc->sc_springtop = sc->sc_spring + SAFE_TOTAL_SPART; 367 sc->sc_spfree = sc->sc_spring; 368 bzero(sc->sc_spring, SAFE_TOTAL_SPART * sizeof(struct safe_pdesc)); 369 370 if (safe_dma_malloc(sc, SAFE_TOTAL_DPART * sizeof (struct safe_pdesc), 371 &sc->sc_dpalloc, 0)) { 372 device_printf(dev, "cannot allocate destination particle " 373 "descriptor ring\n"); 374 lockuninit(&sc->sc_ringlock); 375 safe_dma_free(sc, &sc->sc_spalloc); 376 safe_dma_free(sc, &sc->sc_ringalloc); 377 bus_dma_tag_destroy(sc->sc_dstdmat); 378 goto bad4; 379 } 380 sc->sc_dpring = (struct safe_pdesc *) sc->sc_dpalloc.dma_vaddr; 381 sc->sc_dpringtop = sc->sc_dpring + SAFE_TOTAL_DPART; 382 sc->sc_dpfree = sc->sc_dpring; 383 bzero(sc->sc_dpring, SAFE_TOTAL_DPART * sizeof(struct safe_pdesc)); 384 385 device_printf(sc->sc_dev, "%s", safe_partname(sc)); 386 387 devinfo = READ_REG(sc, SAFE_DEVINFO); 388 if (devinfo & SAFE_DEVINFO_RNG) { 389 sc->sc_flags |= SAFE_FLAGS_RNG; 390 kprintf(" rng"); 391 } 392 if (devinfo & SAFE_DEVINFO_PKEY) { 393 #if 0 394 kprintf(" key"); 395 sc->sc_flags |= SAFE_FLAGS_KEY; 396 crypto_kregister(sc->sc_cid, CRK_MOD_EXP, 0); 397 crypto_kregister(sc->sc_cid, CRK_MOD_EXP_CRT, 0); 398 #endif 399 } 400 if (devinfo & SAFE_DEVINFO_DES) { 401 kprintf(" des/3des"); 402 crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0); 403 crypto_register(sc->sc_cid, CRYPTO_DES_CBC, 0, 0); 404 } 405 if (devinfo & SAFE_DEVINFO_AES) { 406 kprintf(" aes"); 407 crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0); 408 } 409 if (devinfo & SAFE_DEVINFO_MD5) { 410 kprintf(" md5"); 411 crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0); 412 } 413 if (devinfo & SAFE_DEVINFO_SHA1) { 414 kprintf(" sha1"); 415 crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0); 416 } 417 kprintf(" null"); 418 crypto_register(sc->sc_cid, CRYPTO_NULL_CBC, 0, 0); 419 crypto_register(sc->sc_cid, CRYPTO_NULL_HMAC, 0, 0); 420 /* XXX other supported algorithms */ 421 kprintf("\n"); 422 423 safe_reset_board(sc); /* reset h/w */ 424 safe_init_pciregs(dev); /* init pci settings */ 425 safe_init_board(sc); /* init h/w */ 426 427 #ifndef SAFE_NO_RNG 428 if (sc->sc_flags & SAFE_FLAGS_RNG) { 429 #ifdef SAFE_RNDTEST 430 sc->sc_rndtest = rndtest_attach(dev); 431 if (sc->sc_rndtest) 432 sc->sc_harvest = rndtest_harvest; 433 else 434 sc->sc_harvest = default_harvest; 435 #else 436 sc->sc_harvest = default_harvest; 437 #endif 438 safe_rng_init(sc); 439 440 callout_init_mp(&sc->sc_rngto); 441 callout_reset(&sc->sc_rngto, hz*safe_rnginterval, safe_rng, sc); 442 } 443 #endif /* SAFE_NO_RNG */ 444 #ifdef SAFE_DEBUG 445 safec = sc; /* for use by hw.safe.dump */ 446 #endif 447 return (0); 448 bad4: 449 crypto_unregister_all(sc->sc_cid); 450 bad3: 451 bus_teardown_intr(dev, sc->sc_irq, sc->sc_ih); 452 bad2: 453 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq); 454 bad1: 455 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, sc->sc_sr); 456 bad: 457 return (ENXIO); 458 } 459 460 /* 461 * Detach a device that successfully probed. 462 */ 463 static int 464 safe_detach(device_t dev) 465 { 466 struct safe_softc *sc = device_get_softc(dev); 467 468 /* XXX wait/abort active ops */ 469 470 WRITE_REG(sc, SAFE_HI_MASK, 0); /* disable interrupts */ 471 472 callout_stop(&sc->sc_rngto); 473 474 crypto_unregister_all(sc->sc_cid); 475 476 #ifdef SAFE_RNDTEST 477 if (sc->sc_rndtest) 478 rndtest_detach(sc->sc_rndtest); 479 #endif 480 481 safe_cleanchip(sc); 482 safe_dma_free(sc, &sc->sc_dpalloc); 483 safe_dma_free(sc, &sc->sc_spalloc); 484 lockuninit(&sc->sc_ringlock); 485 safe_dma_free(sc, &sc->sc_ringalloc); 486 487 bus_generic_detach(dev); 488 bus_teardown_intr(dev, sc->sc_irq, sc->sc_ih); 489 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq); 490 491 bus_dma_tag_destroy(sc->sc_srcdmat); 492 bus_dma_tag_destroy(sc->sc_dstdmat); 493 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, sc->sc_sr); 494 495 return (0); 496 } 497 498 /* 499 * Stop all chip i/o so that the kernel's probe routines don't 500 * get confused by errant DMAs when rebooting. 501 */ 502 static int 503 safe_shutdown(device_t dev) 504 { 505 #ifdef notyet 506 safe_stop(device_get_softc(dev)); 507 #endif 508 return (0); 509 } 510 511 /* 512 * Device suspend routine. 513 */ 514 static int 515 safe_suspend(device_t dev) 516 { 517 struct safe_softc *sc = device_get_softc(dev); 518 519 #ifdef notyet 520 /* XXX stop the device and save PCI settings */ 521 #endif 522 sc->sc_suspended = 1; 523 524 return (0); 525 } 526 527 static int 528 safe_resume(device_t dev) 529 { 530 struct safe_softc *sc = device_get_softc(dev); 531 532 #ifdef notyet 533 /* XXX retore PCI settings and start the device */ 534 #endif 535 sc->sc_suspended = 0; 536 return (0); 537 } 538 539 /* 540 * SafeXcel Interrupt routine 541 */ 542 static void 543 safe_intr(void *arg) 544 { 545 struct safe_softc *sc = arg; 546 volatile u_int32_t stat; 547 548 stat = READ_REG(sc, SAFE_HM_STAT); 549 if (stat == 0) /* shared irq, not for us */ 550 return; 551 552 WRITE_REG(sc, SAFE_HI_CLR, stat); /* IACK */ 553 554 if ((stat & SAFE_INT_PE_DDONE)) { 555 /* 556 * Descriptor(s) done; scan the ring and 557 * process completed operations. 558 */ 559 lockmgr(&sc->sc_ringlock, LK_EXCLUSIVE); 560 while (sc->sc_back != sc->sc_front) { 561 struct safe_ringentry *re = sc->sc_back; 562 #ifdef SAFE_DEBUG 563 if (safe_debug) { 564 safe_dump_ringstate(sc, __func__); 565 safe_dump_request(sc, __func__, re); 566 } 567 #endif 568 /* 569 * safe_process marks ring entries that were allocated 570 * but not used with a csr of zero. This insures the 571 * ring front pointer never needs to be set backwards 572 * in the event that an entry is allocated but not used 573 * because of a setup error. 574 */ 575 if (re->re_desc.d_csr != 0) { 576 if (!SAFE_PE_CSR_IS_DONE(re->re_desc.d_csr)) 577 break; 578 if (!SAFE_PE_LEN_IS_DONE(re->re_desc.d_len)) 579 break; 580 sc->sc_nqchip--; 581 safe_callback(sc, re); 582 } 583 if (++(sc->sc_back) == sc->sc_ringtop) 584 sc->sc_back = sc->sc_ring; 585 } 586 lockmgr(&sc->sc_ringlock, LK_RELEASE); 587 } 588 589 /* 590 * Check to see if we got any DMA Error 591 */ 592 if (stat & SAFE_INT_PE_ERROR) { 593 DPRINTF(("dmaerr dmastat %08x\n", 594 READ_REG(sc, SAFE_PE_DMASTAT))); 595 safestats.st_dmaerr++; 596 safe_totalreset(sc); 597 #if 0 598 safe_feed(sc); 599 #endif 600 } 601 602 if (sc->sc_needwakeup) { /* XXX check high watermark */ 603 int wakeup = sc->sc_needwakeup & (CRYPTO_SYMQ|CRYPTO_ASYMQ); 604 DPRINTF(("%s: wakeup crypto %x\n", __func__, 605 sc->sc_needwakeup)); 606 sc->sc_needwakeup &= ~wakeup; 607 crypto_unblock(sc->sc_cid, wakeup); 608 } 609 } 610 611 /* 612 * safe_feed() - post a request to chip 613 */ 614 static void 615 safe_feed(struct safe_softc *sc, struct safe_ringentry *re) 616 { 617 bus_dmamap_sync(sc->sc_srcdmat, re->re_src_map, BUS_DMASYNC_PREWRITE); 618 if (re->re_dst_map != NULL) 619 bus_dmamap_sync(sc->sc_dstdmat, re->re_dst_map, 620 BUS_DMASYNC_PREREAD); 621 /* XXX have no smaller granularity */ 622 safe_dma_sync(&sc->sc_ringalloc, 623 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 624 safe_dma_sync(&sc->sc_spalloc, BUS_DMASYNC_PREWRITE); 625 safe_dma_sync(&sc->sc_dpalloc, BUS_DMASYNC_PREWRITE); 626 627 #ifdef SAFE_DEBUG 628 if (safe_debug) { 629 safe_dump_ringstate(sc, __func__); 630 safe_dump_request(sc, __func__, re); 631 } 632 #endif 633 sc->sc_nqchip++; 634 if (sc->sc_nqchip > safestats.st_maxqchip) 635 safestats.st_maxqchip = sc->sc_nqchip; 636 /* poke h/w to check descriptor ring, any value can be written */ 637 WRITE_REG(sc, SAFE_HI_RD_DESCR, 0); 638 } 639 640 #define N(a) (sizeof(a) / sizeof (a[0])) 641 static void 642 safe_setup_enckey(struct safe_session *ses, caddr_t key) 643 { 644 int i; 645 646 bcopy(key, ses->ses_key, ses->ses_klen / 8); 647 648 /* PE is little-endian, insure proper byte order */ 649 for (i = 0; i < N(ses->ses_key); i++) 650 ses->ses_key[i] = htole32(ses->ses_key[i]); 651 } 652 653 static void 654 safe_setup_mackey(struct safe_session *ses, int algo, caddr_t key, int klen) 655 { 656 MD5_CTX md5ctx; 657 SHA1_CTX sha1ctx; 658 int i; 659 660 661 for (i = 0; i < klen; i++) 662 key[i] ^= HMAC_IPAD_VAL; 663 664 if (algo == CRYPTO_MD5_HMAC) { 665 MD5Init(&md5ctx); 666 MD5Update(&md5ctx, key, klen); 667 MD5Update(&md5ctx, hmac_ipad_buffer, MD5_HMAC_BLOCK_LEN - klen); 668 bcopy(md5ctx.state, ses->ses_hminner, sizeof(md5ctx.state)); 669 } else { 670 SHA1Init(&sha1ctx); 671 SHA1Update(&sha1ctx, key, klen); 672 SHA1Update(&sha1ctx, hmac_ipad_buffer, 673 SHA1_HMAC_BLOCK_LEN - klen); 674 bcopy(sha1ctx.h.b32, ses->ses_hminner, sizeof(sha1ctx.h.b32)); 675 } 676 677 for (i = 0; i < klen; i++) 678 key[i] ^= (HMAC_IPAD_VAL ^ HMAC_OPAD_VAL); 679 680 if (algo == CRYPTO_MD5_HMAC) { 681 MD5Init(&md5ctx); 682 MD5Update(&md5ctx, key, klen); 683 MD5Update(&md5ctx, hmac_opad_buffer, MD5_HMAC_BLOCK_LEN - klen); 684 bcopy(md5ctx.state, ses->ses_hmouter, sizeof(md5ctx.state)); 685 } else { 686 SHA1Init(&sha1ctx); 687 SHA1Update(&sha1ctx, key, klen); 688 SHA1Update(&sha1ctx, hmac_opad_buffer, 689 SHA1_HMAC_BLOCK_LEN - klen); 690 bcopy(sha1ctx.h.b32, ses->ses_hmouter, sizeof(sha1ctx.h.b32)); 691 } 692 693 for (i = 0; i < klen; i++) 694 key[i] ^= HMAC_OPAD_VAL; 695 696 /* PE is little-endian, insure proper byte order */ 697 for (i = 0; i < N(ses->ses_hminner); i++) { 698 ses->ses_hminner[i] = htole32(ses->ses_hminner[i]); 699 ses->ses_hmouter[i] = htole32(ses->ses_hmouter[i]); 700 } 701 } 702 #undef N 703 704 /* 705 * Allocate a new 'session' and return an encoded session id. 'sidp' 706 * contains our registration id, and should contain an encoded session 707 * id on successful allocation. 708 */ 709 static int 710 safe_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri) 711 { 712 struct safe_softc *sc = device_get_softc(dev); 713 struct cryptoini *c, *encini = NULL, *macini = NULL; 714 struct safe_session *ses = NULL; 715 int sesn; 716 717 if (sidp == NULL || cri == NULL || sc == NULL) 718 return (EINVAL); 719 720 for (c = cri; c != NULL; c = c->cri_next) { 721 if (c->cri_alg == CRYPTO_MD5_HMAC || 722 c->cri_alg == CRYPTO_SHA1_HMAC || 723 c->cri_alg == CRYPTO_NULL_HMAC) { 724 if (macini) 725 return (EINVAL); 726 macini = c; 727 } else if (c->cri_alg == CRYPTO_DES_CBC || 728 c->cri_alg == CRYPTO_3DES_CBC || 729 c->cri_alg == CRYPTO_AES_CBC || 730 c->cri_alg == CRYPTO_NULL_CBC) { 731 if (encini) 732 return (EINVAL); 733 encini = c; 734 } else 735 return (EINVAL); 736 } 737 if (encini == NULL && macini == NULL) 738 return (EINVAL); 739 if (encini) { /* validate key length */ 740 switch (encini->cri_alg) { 741 case CRYPTO_DES_CBC: 742 if (encini->cri_klen != 64) 743 return (EINVAL); 744 break; 745 case CRYPTO_3DES_CBC: 746 if (encini->cri_klen != 192) 747 return (EINVAL); 748 break; 749 case CRYPTO_AES_CBC: 750 if (encini->cri_klen != 128 && 751 encini->cri_klen != 192 && 752 encini->cri_klen != 256) 753 return (EINVAL); 754 break; 755 } 756 } 757 758 if (sc->sc_sessions == NULL) { 759 ses = sc->sc_sessions = (struct safe_session *)kmalloc( 760 sizeof(struct safe_session), M_DEVBUF, M_NOWAIT); 761 if (ses == NULL) 762 return (ENOMEM); 763 sesn = 0; 764 sc->sc_nsessions = 1; 765 } else { 766 for (sesn = 0; sesn < sc->sc_nsessions; sesn++) { 767 if (sc->sc_sessions[sesn].ses_used == 0) { 768 ses = &sc->sc_sessions[sesn]; 769 break; 770 } 771 } 772 773 if (ses == NULL) { 774 sesn = sc->sc_nsessions; 775 ses = (struct safe_session *)kmalloc((sesn + 1) * 776 sizeof(struct safe_session), M_DEVBUF, M_NOWAIT); 777 if (ses == NULL) 778 return (ENOMEM); 779 bcopy(sc->sc_sessions, ses, sesn * 780 sizeof(struct safe_session)); 781 bzero(sc->sc_sessions, sesn * 782 sizeof(struct safe_session)); 783 kfree(sc->sc_sessions, M_DEVBUF); 784 sc->sc_sessions = ses; 785 ses = &sc->sc_sessions[sesn]; 786 sc->sc_nsessions++; 787 } 788 } 789 790 bzero(ses, sizeof(struct safe_session)); 791 ses->ses_used = 1; 792 793 if (encini) { 794 /* get an IV */ 795 /* XXX may read fewer than requested */ 796 read_random(ses->ses_iv, sizeof(ses->ses_iv)); 797 798 ses->ses_klen = encini->cri_klen; 799 if (encini->cri_key != NULL) 800 safe_setup_enckey(ses, encini->cri_key); 801 } 802 803 if (macini) { 804 ses->ses_mlen = macini->cri_mlen; 805 if (ses->ses_mlen == 0) { 806 if (macini->cri_alg == CRYPTO_MD5_HMAC) 807 ses->ses_mlen = MD5_HASH_LEN; 808 else 809 ses->ses_mlen = SHA1_HASH_LEN; 810 } 811 812 if (macini->cri_key != NULL) { 813 safe_setup_mackey(ses, macini->cri_alg, macini->cri_key, 814 macini->cri_klen / 8); 815 } 816 } 817 818 *sidp = SAFE_SID(device_get_unit(sc->sc_dev), sesn); 819 return (0); 820 } 821 822 /* 823 * Deallocate a session. 824 */ 825 static int 826 safe_freesession(device_t dev, u_int64_t tid) 827 { 828 struct safe_softc *sc = device_get_softc(dev); 829 int session, ret; 830 u_int32_t sid = ((u_int32_t) tid) & 0xffffffff; 831 832 if (sc == NULL) 833 return (EINVAL); 834 835 session = SAFE_SESSION(sid); 836 if (session < sc->sc_nsessions) { 837 bzero(&sc->sc_sessions[session], sizeof(sc->sc_sessions[session])); 838 ret = 0; 839 } else 840 ret = EINVAL; 841 return (ret); 842 } 843 844 static void 845 safe_op_cb(void *arg, bus_dma_segment_t *seg, int nsegs, bus_size_t mapsize, int error) 846 { 847 struct safe_operand *op = arg; 848 849 DPRINTF(("%s: mapsize %u nsegs %d error %d\n", __func__, 850 (u_int) mapsize, nsegs, error)); 851 if (error != 0) 852 return; 853 op->mapsize = mapsize; 854 op->nsegs = nsegs; 855 bcopy(seg, op->segs, nsegs * sizeof (seg[0])); 856 } 857 858 static int 859 safe_process(device_t dev, struct cryptop *crp, int hint) 860 { 861 struct safe_softc *sc = device_get_softc(dev); 862 int err = 0, i, nicealign, uniform; 863 struct cryptodesc *crd1, *crd2, *maccrd, *enccrd; 864 int bypass, oplen, ivsize; 865 caddr_t iv; 866 int16_t coffset; 867 struct safe_session *ses; 868 struct safe_ringentry *re; 869 struct safe_sarec *sa; 870 struct safe_pdesc *pd; 871 u_int32_t cmd0, cmd1, staterec; 872 873 if (crp == NULL || crp->crp_callback == NULL || sc == NULL) { 874 safestats.st_invalid++; 875 return (EINVAL); 876 } 877 if (SAFE_SESSION(crp->crp_sid) >= sc->sc_nsessions) { 878 safestats.st_badsession++; 879 return (EINVAL); 880 } 881 882 lockmgr(&sc->sc_ringlock, LK_EXCLUSIVE); 883 if (sc->sc_front == sc->sc_back && sc->sc_nqchip != 0) { 884 safestats.st_ringfull++; 885 sc->sc_needwakeup |= CRYPTO_SYMQ; 886 lockmgr(&sc->sc_ringlock, LK_RELEASE); 887 return (ERESTART); 888 } 889 re = sc->sc_front; 890 891 staterec = re->re_sa.sa_staterec; /* save */ 892 /* NB: zero everything but the PE descriptor */ 893 bzero(&re->re_sa, sizeof(struct safe_ringentry) - sizeof(re->re_desc)); 894 re->re_sa.sa_staterec = staterec; /* restore */ 895 896 re->re_crp = crp; 897 re->re_sesn = SAFE_SESSION(crp->crp_sid); 898 899 if (crp->crp_flags & CRYPTO_F_IMBUF) { 900 re->re_src_m = (struct mbuf *)crp->crp_buf; 901 re->re_dst_m = (struct mbuf *)crp->crp_buf; 902 } else if (crp->crp_flags & CRYPTO_F_IOV) { 903 re->re_src_io = (struct uio *)crp->crp_buf; 904 re->re_dst_io = (struct uio *)crp->crp_buf; 905 } else { 906 safestats.st_badflags++; 907 err = EINVAL; 908 goto errout; /* XXX we don't handle contiguous blocks! */ 909 } 910 911 sa = &re->re_sa; 912 ses = &sc->sc_sessions[re->re_sesn]; 913 914 crd1 = crp->crp_desc; 915 if (crd1 == NULL) { 916 safestats.st_nodesc++; 917 err = EINVAL; 918 goto errout; 919 } 920 crd2 = crd1->crd_next; 921 922 cmd0 = SAFE_SA_CMD0_BASIC; /* basic group operation */ 923 cmd1 = 0; 924 if (crd2 == NULL) { 925 if (crd1->crd_alg == CRYPTO_MD5_HMAC || 926 crd1->crd_alg == CRYPTO_SHA1_HMAC || 927 crd1->crd_alg == CRYPTO_NULL_HMAC) { 928 maccrd = crd1; 929 enccrd = NULL; 930 cmd0 |= SAFE_SA_CMD0_OP_HASH; 931 } else if (crd1->crd_alg == CRYPTO_DES_CBC || 932 crd1->crd_alg == CRYPTO_3DES_CBC || 933 crd1->crd_alg == CRYPTO_AES_CBC || 934 crd1->crd_alg == CRYPTO_NULL_CBC) { 935 maccrd = NULL; 936 enccrd = crd1; 937 cmd0 |= SAFE_SA_CMD0_OP_CRYPT; 938 } else { 939 safestats.st_badalg++; 940 err = EINVAL; 941 goto errout; 942 } 943 } else { 944 if ((crd1->crd_alg == CRYPTO_MD5_HMAC || 945 crd1->crd_alg == CRYPTO_SHA1_HMAC || 946 crd1->crd_alg == CRYPTO_NULL_HMAC) && 947 (crd2->crd_alg == CRYPTO_DES_CBC || 948 crd2->crd_alg == CRYPTO_3DES_CBC || 949 crd2->crd_alg == CRYPTO_AES_CBC || 950 crd2->crd_alg == CRYPTO_NULL_CBC) && 951 ((crd2->crd_flags & CRD_F_ENCRYPT) == 0)) { 952 maccrd = crd1; 953 enccrd = crd2; 954 } else if ((crd1->crd_alg == CRYPTO_DES_CBC || 955 crd1->crd_alg == CRYPTO_3DES_CBC || 956 crd1->crd_alg == CRYPTO_AES_CBC || 957 crd1->crd_alg == CRYPTO_NULL_CBC) && 958 (crd2->crd_alg == CRYPTO_MD5_HMAC || 959 crd2->crd_alg == CRYPTO_SHA1_HMAC || 960 crd2->crd_alg == CRYPTO_NULL_HMAC) && 961 (crd1->crd_flags & CRD_F_ENCRYPT)) { 962 enccrd = crd1; 963 maccrd = crd2; 964 } else { 965 safestats.st_badalg++; 966 err = EINVAL; 967 goto errout; 968 } 969 cmd0 |= SAFE_SA_CMD0_OP_BOTH; 970 } 971 972 if (enccrd) { 973 if (enccrd->crd_flags & CRD_F_KEY_EXPLICIT) 974 safe_setup_enckey(ses, enccrd->crd_key); 975 976 if (enccrd->crd_alg == CRYPTO_DES_CBC) { 977 cmd0 |= SAFE_SA_CMD0_DES; 978 cmd1 |= SAFE_SA_CMD1_CBC; 979 ivsize = 2*sizeof(u_int32_t); 980 } else if (enccrd->crd_alg == CRYPTO_3DES_CBC) { 981 cmd0 |= SAFE_SA_CMD0_3DES; 982 cmd1 |= SAFE_SA_CMD1_CBC; 983 ivsize = 2*sizeof(u_int32_t); 984 } else if (enccrd->crd_alg == CRYPTO_AES_CBC) { 985 cmd0 |= SAFE_SA_CMD0_AES; 986 cmd1 |= SAFE_SA_CMD1_CBC; 987 if (ses->ses_klen == 128) 988 cmd1 |= SAFE_SA_CMD1_AES128; 989 else if (ses->ses_klen == 192) 990 cmd1 |= SAFE_SA_CMD1_AES192; 991 else 992 cmd1 |= SAFE_SA_CMD1_AES256; 993 ivsize = 4*sizeof(u_int32_t); 994 } else { 995 cmd0 |= SAFE_SA_CMD0_CRYPT_NULL; 996 ivsize = 0; 997 } 998 999 /* 1000 * Setup encrypt/decrypt state. When using basic ops 1001 * we can't use an inline IV because hash/crypt offset 1002 * must be from the end of the IV to the start of the 1003 * crypt data and this leaves out the preceding header 1004 * from the hash calculation. Instead we place the IV 1005 * in the state record and set the hash/crypt offset to 1006 * copy both the header+IV. 1007 */ 1008 if (enccrd->crd_flags & CRD_F_ENCRYPT) { 1009 cmd0 |= SAFE_SA_CMD0_OUTBOUND; 1010 1011 if (enccrd->crd_flags & CRD_F_IV_EXPLICIT) 1012 iv = enccrd->crd_iv; 1013 else 1014 iv = (caddr_t) ses->ses_iv; 1015 if ((enccrd->crd_flags & CRD_F_IV_PRESENT) == 0) { 1016 crypto_copyback(crp->crp_flags, crp->crp_buf, 1017 enccrd->crd_inject, ivsize, iv); 1018 } 1019 bcopy(iv, re->re_sastate.sa_saved_iv, ivsize); 1020 cmd0 |= SAFE_SA_CMD0_IVLD_STATE | SAFE_SA_CMD0_SAVEIV; 1021 re->re_flags |= SAFE_QFLAGS_COPYOUTIV; 1022 } else { 1023 cmd0 |= SAFE_SA_CMD0_INBOUND; 1024 1025 if (enccrd->crd_flags & CRD_F_IV_EXPLICIT) { 1026 bcopy(enccrd->crd_iv, 1027 re->re_sastate.sa_saved_iv, ivsize); 1028 } else { 1029 crypto_copydata(crp->crp_flags, crp->crp_buf, 1030 enccrd->crd_inject, ivsize, 1031 (caddr_t)re->re_sastate.sa_saved_iv); 1032 } 1033 cmd0 |= SAFE_SA_CMD0_IVLD_STATE; 1034 } 1035 /* 1036 * For basic encryption use the zero pad algorithm. 1037 * This pads results to an 8-byte boundary and 1038 * suppresses padding verification for inbound (i.e. 1039 * decrypt) operations. 1040 * 1041 * NB: Not sure if the 8-byte pad boundary is a problem. 1042 */ 1043 cmd0 |= SAFE_SA_CMD0_PAD_ZERO; 1044 1045 /* XXX assert key bufs have the same size */ 1046 bcopy(ses->ses_key, sa->sa_key, sizeof(sa->sa_key)); 1047 } 1048 1049 if (maccrd) { 1050 if (maccrd->crd_flags & CRD_F_KEY_EXPLICIT) { 1051 safe_setup_mackey(ses, maccrd->crd_alg, 1052 maccrd->crd_key, maccrd->crd_klen / 8); 1053 } 1054 1055 if (maccrd->crd_alg == CRYPTO_MD5_HMAC) { 1056 cmd0 |= SAFE_SA_CMD0_MD5; 1057 cmd1 |= SAFE_SA_CMD1_HMAC; /* NB: enable HMAC */ 1058 } else if (maccrd->crd_alg == CRYPTO_SHA1_HMAC) { 1059 cmd0 |= SAFE_SA_CMD0_SHA1; 1060 cmd1 |= SAFE_SA_CMD1_HMAC; /* NB: enable HMAC */ 1061 } else { 1062 cmd0 |= SAFE_SA_CMD0_HASH_NULL; 1063 } 1064 /* 1065 * Digest data is loaded from the SA and the hash 1066 * result is saved to the state block where we 1067 * retrieve it for return to the caller. 1068 */ 1069 /* XXX assert digest bufs have the same size */ 1070 bcopy(ses->ses_hminner, sa->sa_indigest, 1071 sizeof(sa->sa_indigest)); 1072 bcopy(ses->ses_hmouter, sa->sa_outdigest, 1073 sizeof(sa->sa_outdigest)); 1074 1075 cmd0 |= SAFE_SA_CMD0_HSLD_SA | SAFE_SA_CMD0_SAVEHASH; 1076 re->re_flags |= SAFE_QFLAGS_COPYOUTICV; 1077 } 1078 1079 if (enccrd && maccrd) { 1080 /* 1081 * The offset from hash data to the start of 1082 * crypt data is the difference in the skips. 1083 */ 1084 bypass = maccrd->crd_skip; 1085 coffset = enccrd->crd_skip - maccrd->crd_skip; 1086 if (coffset < 0) { 1087 DPRINTF(("%s: hash does not precede crypt; " 1088 "mac skip %u enc skip %u\n", 1089 __func__, maccrd->crd_skip, enccrd->crd_skip)); 1090 safestats.st_skipmismatch++; 1091 err = EINVAL; 1092 goto errout; 1093 } 1094 oplen = enccrd->crd_skip + enccrd->crd_len; 1095 if (maccrd->crd_skip + maccrd->crd_len != oplen) { 1096 DPRINTF(("%s: hash amount %u != crypt amount %u\n", 1097 __func__, maccrd->crd_skip + maccrd->crd_len, 1098 oplen)); 1099 safestats.st_lenmismatch++; 1100 err = EINVAL; 1101 goto errout; 1102 } 1103 #ifdef SAFE_DEBUG 1104 if (safe_debug) { 1105 kprintf("mac: skip %d, len %d, inject %d\n", 1106 maccrd->crd_skip, maccrd->crd_len, 1107 maccrd->crd_inject); 1108 kprintf("enc: skip %d, len %d, inject %d\n", 1109 enccrd->crd_skip, enccrd->crd_len, 1110 enccrd->crd_inject); 1111 kprintf("bypass %d coffset %d oplen %d\n", 1112 bypass, coffset, oplen); 1113 } 1114 #endif 1115 if (coffset & 3) { /* offset must be 32-bit aligned */ 1116 DPRINTF(("%s: coffset %u misaligned\n", 1117 __func__, coffset)); 1118 safestats.st_coffmisaligned++; 1119 err = EINVAL; 1120 goto errout; 1121 } 1122 coffset >>= 2; 1123 if (coffset > 255) { /* offset must be <256 dwords */ 1124 DPRINTF(("%s: coffset %u too big\n", 1125 __func__, coffset)); 1126 safestats.st_cofftoobig++; 1127 err = EINVAL; 1128 goto errout; 1129 } 1130 /* 1131 * Tell the hardware to copy the header to the output. 1132 * The header is defined as the data from the end of 1133 * the bypass to the start of data to be encrypted. 1134 * Typically this is the inline IV. Note that you need 1135 * to do this even if src+dst are the same; it appears 1136 * that w/o this bit the crypted data is written 1137 * immediately after the bypass data. 1138 */ 1139 cmd1 |= SAFE_SA_CMD1_HDRCOPY; 1140 /* 1141 * Disable IP header mutable bit handling. This is 1142 * needed to get correct HMAC calculations. 1143 */ 1144 cmd1 |= SAFE_SA_CMD1_MUTABLE; 1145 } else { 1146 if (enccrd) { 1147 bypass = enccrd->crd_skip; 1148 oplen = bypass + enccrd->crd_len; 1149 } else { 1150 bypass = maccrd->crd_skip; 1151 oplen = bypass + maccrd->crd_len; 1152 } 1153 coffset = 0; 1154 } 1155 /* XXX verify multiple of 4 when using s/g */ 1156 if (bypass > 96) { /* bypass offset must be <= 96 bytes */ 1157 DPRINTF(("%s: bypass %u too big\n", __func__, bypass)); 1158 safestats.st_bypasstoobig++; 1159 err = EINVAL; 1160 goto errout; 1161 } 1162 1163 if (bus_dmamap_create(sc->sc_srcdmat, BUS_DMA_NOWAIT, &re->re_src_map)) { 1164 safestats.st_nomap++; 1165 err = ENOMEM; 1166 goto errout; 1167 } 1168 if (crp->crp_flags & CRYPTO_F_IMBUF) { 1169 if (bus_dmamap_load_mbuf(sc->sc_srcdmat, re->re_src_map, 1170 re->re_src_m, safe_op_cb, 1171 &re->re_src, BUS_DMA_NOWAIT) != 0) { 1172 bus_dmamap_destroy(sc->sc_srcdmat, re->re_src_map); 1173 re->re_src_map = NULL; 1174 safestats.st_noload++; 1175 err = ENOMEM; 1176 goto errout; 1177 } 1178 } else if (crp->crp_flags & CRYPTO_F_IOV) { 1179 if (bus_dmamap_load_uio(sc->sc_srcdmat, re->re_src_map, 1180 re->re_src_io, safe_op_cb, 1181 &re->re_src, BUS_DMA_NOWAIT) != 0) { 1182 bus_dmamap_destroy(sc->sc_srcdmat, re->re_src_map); 1183 re->re_src_map = NULL; 1184 safestats.st_noload++; 1185 err = ENOMEM; 1186 goto errout; 1187 } 1188 } 1189 nicealign = safe_dmamap_aligned(&re->re_src); 1190 uniform = safe_dmamap_uniform(&re->re_src); 1191 1192 DPRINTF(("src nicealign %u uniform %u nsegs %u\n", 1193 nicealign, uniform, re->re_src.nsegs)); 1194 if (re->re_src.nsegs > 1) { 1195 re->re_desc.d_src = sc->sc_spalloc.dma_paddr + 1196 ((caddr_t) sc->sc_spfree - (caddr_t) sc->sc_spring); 1197 for (i = 0; i < re->re_src_nsegs; i++) { 1198 /* NB: no need to check if there's space */ 1199 pd = sc->sc_spfree; 1200 if (++(sc->sc_spfree) == sc->sc_springtop) 1201 sc->sc_spfree = sc->sc_spring; 1202 1203 KASSERT((pd->pd_flags&3) == 0 || 1204 (pd->pd_flags&3) == SAFE_PD_DONE, 1205 ("bogus source particle descriptor; flags %x", 1206 pd->pd_flags)); 1207 pd->pd_addr = re->re_src_segs[i].ds_addr; 1208 pd->pd_size = re->re_src_segs[i].ds_len; 1209 pd->pd_flags = SAFE_PD_READY; 1210 } 1211 cmd0 |= SAFE_SA_CMD0_IGATHER; 1212 } else { 1213 /* 1214 * No need for gather, reference the operand directly. 1215 */ 1216 re->re_desc.d_src = re->re_src_segs[0].ds_addr; 1217 } 1218 1219 if (enccrd == NULL && maccrd != NULL) { 1220 /* 1221 * Hash op; no destination needed. 1222 */ 1223 } else { 1224 if (crp->crp_flags & CRYPTO_F_IOV) { 1225 if (!nicealign) { 1226 safestats.st_iovmisaligned++; 1227 err = EINVAL; 1228 goto errout; 1229 } 1230 if (uniform != 1) { 1231 /* 1232 * Source is not suitable for direct use as 1233 * the destination. Create a new scatter/gather 1234 * list based on the destination requirements 1235 * and check if that's ok. 1236 */ 1237 if (bus_dmamap_create(sc->sc_dstdmat, 1238 BUS_DMA_NOWAIT, &re->re_dst_map)) { 1239 safestats.st_nomap++; 1240 err = ENOMEM; 1241 goto errout; 1242 } 1243 if (bus_dmamap_load_uio(sc->sc_dstdmat, 1244 re->re_dst_map, re->re_dst_io, 1245 safe_op_cb, &re->re_dst, 1246 BUS_DMA_NOWAIT) != 0) { 1247 bus_dmamap_destroy(sc->sc_dstdmat, 1248 re->re_dst_map); 1249 re->re_dst_map = NULL; 1250 safestats.st_noload++; 1251 err = ENOMEM; 1252 goto errout; 1253 } 1254 uniform = safe_dmamap_uniform(&re->re_dst); 1255 if (!uniform) { 1256 /* 1257 * There's no way to handle the DMA 1258 * requirements with this uio. We 1259 * could create a separate DMA area for 1260 * the result and then copy it back, 1261 * but for now we just bail and return 1262 * an error. Note that uio requests 1263 * > SAFE_MAX_DSIZE are handled because 1264 * the DMA map and segment list for the 1265 * destination wil result in a 1266 * destination particle list that does 1267 * the necessary scatter DMA. 1268 */ 1269 safestats.st_iovnotuniform++; 1270 err = EINVAL; 1271 goto errout; 1272 } 1273 } else 1274 re->re_dst = re->re_src; 1275 } else if (crp->crp_flags & CRYPTO_F_IMBUF) { 1276 if (nicealign && uniform == 1) { 1277 /* 1278 * Source layout is suitable for direct 1279 * sharing of the DMA map and segment list. 1280 */ 1281 re->re_dst = re->re_src; 1282 } else if (nicealign && uniform == 2) { 1283 /* 1284 * The source is properly aligned but requires a 1285 * different particle list to handle DMA of the 1286 * result. Create a new map and do the load to 1287 * create the segment list. The particle 1288 * descriptor setup code below will handle the 1289 * rest. 1290 */ 1291 if (bus_dmamap_create(sc->sc_dstdmat, 1292 BUS_DMA_NOWAIT, &re->re_dst_map)) { 1293 safestats.st_nomap++; 1294 err = ENOMEM; 1295 goto errout; 1296 } 1297 if (bus_dmamap_load_mbuf(sc->sc_dstdmat, 1298 re->re_dst_map, re->re_dst_m, 1299 safe_op_cb, &re->re_dst, 1300 BUS_DMA_NOWAIT) != 0) { 1301 bus_dmamap_destroy(sc->sc_dstdmat, 1302 re->re_dst_map); 1303 re->re_dst_map = NULL; 1304 safestats.st_noload++; 1305 err = ENOMEM; 1306 goto errout; 1307 } 1308 } else { /* !(aligned and/or uniform) */ 1309 int totlen, len; 1310 struct mbuf *m, *top, **mp; 1311 1312 /* 1313 * DMA constraints require that we allocate a 1314 * new mbuf chain for the destination. We 1315 * allocate an entire new set of mbufs of 1316 * optimal/required size and then tell the 1317 * hardware to copy any bits that are not 1318 * created as a byproduct of the operation. 1319 */ 1320 if (!nicealign) 1321 safestats.st_unaligned++; 1322 if (!uniform) 1323 safestats.st_notuniform++; 1324 totlen = re->re_src_mapsize; 1325 if (re->re_src_m->m_flags & M_PKTHDR) { 1326 len = MHLEN; 1327 MGETHDR(m, MB_DONTWAIT, MT_DATA); 1328 if (m && !m_dup_pkthdr(m, re->re_src_m, 1329 MB_DONTWAIT)) { 1330 m_free(m); 1331 m = NULL; 1332 } 1333 } else { 1334 len = MLEN; 1335 MGET(m, MB_DONTWAIT, MT_DATA); 1336 } 1337 if (m == NULL) { 1338 safestats.st_nombuf++; 1339 err = sc->sc_nqchip ? ERESTART : ENOMEM; 1340 goto errout; 1341 } 1342 if (totlen >= MINCLSIZE) { 1343 MCLGET(m, MB_DONTWAIT); 1344 if ((m->m_flags & M_EXT) == 0) { 1345 m_free(m); 1346 safestats.st_nomcl++; 1347 err = sc->sc_nqchip ? 1348 ERESTART : ENOMEM; 1349 goto errout; 1350 } 1351 len = MCLBYTES; 1352 } 1353 m->m_len = len; 1354 top = NULL; 1355 mp = ⊤ 1356 1357 while (totlen > 0) { 1358 if (top) { 1359 MGET(m, MB_DONTWAIT, MT_DATA); 1360 if (m == NULL) { 1361 m_freem(top); 1362 safestats.st_nombuf++; 1363 err = sc->sc_nqchip ? 1364 ERESTART : ENOMEM; 1365 goto errout; 1366 } 1367 len = MLEN; 1368 } 1369 if (top && totlen >= MINCLSIZE) { 1370 MCLGET(m, MB_DONTWAIT); 1371 if ((m->m_flags & M_EXT) == 0) { 1372 *mp = m; 1373 m_freem(top); 1374 safestats.st_nomcl++; 1375 err = sc->sc_nqchip ? 1376 ERESTART : ENOMEM; 1377 goto errout; 1378 } 1379 len = MCLBYTES; 1380 } 1381 m->m_len = len = min(totlen, len); 1382 totlen -= len; 1383 *mp = m; 1384 mp = &m->m_next; 1385 } 1386 re->re_dst_m = top; 1387 if (bus_dmamap_create(sc->sc_dstdmat, 1388 BUS_DMA_NOWAIT, &re->re_dst_map) != 0) { 1389 safestats.st_nomap++; 1390 err = ENOMEM; 1391 goto errout; 1392 } 1393 if (bus_dmamap_load_mbuf(sc->sc_dstdmat, 1394 re->re_dst_map, re->re_dst_m, 1395 safe_op_cb, &re->re_dst, 1396 BUS_DMA_NOWAIT) != 0) { 1397 bus_dmamap_destroy(sc->sc_dstdmat, 1398 re->re_dst_map); 1399 re->re_dst_map = NULL; 1400 safestats.st_noload++; 1401 err = ENOMEM; 1402 goto errout; 1403 } 1404 if (re->re_src.mapsize > oplen) { 1405 /* 1406 * There's data following what the 1407 * hardware will copy for us. If this 1408 * isn't just the ICV (that's going to 1409 * be written on completion), copy it 1410 * to the new mbufs 1411 */ 1412 if (!(maccrd && 1413 (re->re_src.mapsize-oplen) == 12 && 1414 maccrd->crd_inject == oplen)) 1415 safe_mcopy(re->re_src_m, 1416 re->re_dst_m, 1417 oplen); 1418 else 1419 safestats.st_noicvcopy++; 1420 } 1421 } 1422 } else { 1423 safestats.st_badflags++; 1424 err = EINVAL; 1425 goto errout; 1426 } 1427 1428 if (re->re_dst.nsegs > 1) { 1429 re->re_desc.d_dst = sc->sc_dpalloc.dma_paddr + 1430 ((caddr_t) sc->sc_dpfree - (caddr_t) sc->sc_dpring); 1431 for (i = 0; i < re->re_dst_nsegs; i++) { 1432 pd = sc->sc_dpfree; 1433 KASSERT((pd->pd_flags&3) == 0 || 1434 (pd->pd_flags&3) == SAFE_PD_DONE, 1435 ("bogus dest particle descriptor; flags %x", 1436 pd->pd_flags)); 1437 if (++(sc->sc_dpfree) == sc->sc_dpringtop) 1438 sc->sc_dpfree = sc->sc_dpring; 1439 pd->pd_addr = re->re_dst_segs[i].ds_addr; 1440 pd->pd_flags = SAFE_PD_READY; 1441 } 1442 cmd0 |= SAFE_SA_CMD0_OSCATTER; 1443 } else { 1444 /* 1445 * No need for scatter, reference the operand directly. 1446 */ 1447 re->re_desc.d_dst = re->re_dst_segs[0].ds_addr; 1448 } 1449 } 1450 1451 /* 1452 * All done with setup; fillin the SA command words 1453 * and the packet engine descriptor. The operation 1454 * is now ready for submission to the hardware. 1455 */ 1456 sa->sa_cmd0 = cmd0 | SAFE_SA_CMD0_IPCI | SAFE_SA_CMD0_OPCI; 1457 sa->sa_cmd1 = cmd1 1458 | (coffset << SAFE_SA_CMD1_OFFSET_S) 1459 | SAFE_SA_CMD1_SAREV1 /* Rev 1 SA data structure */ 1460 | SAFE_SA_CMD1_SRPCI 1461 ; 1462 /* 1463 * NB: the order of writes is important here. In case the 1464 * chip is scanning the ring because of an outstanding request 1465 * it might nab this one too. In that case we need to make 1466 * sure the setup is complete before we write the length 1467 * field of the descriptor as it signals the descriptor is 1468 * ready for processing. 1469 */ 1470 re->re_desc.d_csr = SAFE_PE_CSR_READY | SAFE_PE_CSR_SAPCI; 1471 if (maccrd) 1472 re->re_desc.d_csr |= SAFE_PE_CSR_LOADSA | SAFE_PE_CSR_HASHFINAL; 1473 re->re_desc.d_len = oplen 1474 | SAFE_PE_LEN_READY 1475 | (bypass << SAFE_PE_LEN_BYPASS_S) 1476 ; 1477 1478 safestats.st_ipackets++; 1479 safestats.st_ibytes += oplen; 1480 1481 if (++(sc->sc_front) == sc->sc_ringtop) 1482 sc->sc_front = sc->sc_ring; 1483 1484 /* XXX honor batching */ 1485 safe_feed(sc, re); 1486 lockmgr(&sc->sc_ringlock, LK_RELEASE); 1487 return (0); 1488 1489 errout: 1490 if ((re->re_dst_m != NULL) && (re->re_src_m != re->re_dst_m)) 1491 m_freem(re->re_dst_m); 1492 1493 if (re->re_dst_map != NULL && re->re_dst_map != re->re_src_map) { 1494 bus_dmamap_unload(sc->sc_dstdmat, re->re_dst_map); 1495 bus_dmamap_destroy(sc->sc_dstdmat, re->re_dst_map); 1496 } 1497 if (re->re_src_map != NULL) { 1498 bus_dmamap_unload(sc->sc_srcdmat, re->re_src_map); 1499 bus_dmamap_destroy(sc->sc_srcdmat, re->re_src_map); 1500 } 1501 lockmgr(&sc->sc_ringlock, LK_RELEASE); 1502 if (err != ERESTART) { 1503 crp->crp_etype = err; 1504 crypto_done(crp); 1505 } else { 1506 sc->sc_needwakeup |= CRYPTO_SYMQ; 1507 } 1508 return (err); 1509 } 1510 1511 static void 1512 safe_callback(struct safe_softc *sc, struct safe_ringentry *re) 1513 { 1514 struct cryptop *crp = (struct cryptop *)re->re_crp; 1515 struct cryptodesc *crd; 1516 1517 safestats.st_opackets++; 1518 safestats.st_obytes += re->re_dst.mapsize; 1519 1520 safe_dma_sync(&sc->sc_ringalloc, 1521 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 1522 if (re->re_desc.d_csr & SAFE_PE_CSR_STATUS) { 1523 device_printf(sc->sc_dev, "csr 0x%x cmd0 0x%x cmd1 0x%x\n", 1524 re->re_desc.d_csr, 1525 re->re_sa.sa_cmd0, re->re_sa.sa_cmd1); 1526 safestats.st_peoperr++; 1527 crp->crp_etype = EIO; /* something more meaningful? */ 1528 } 1529 if (re->re_dst_map != NULL && re->re_dst_map != re->re_src_map) { 1530 bus_dmamap_sync(sc->sc_dstdmat, re->re_dst_map, 1531 BUS_DMASYNC_POSTREAD); 1532 bus_dmamap_unload(sc->sc_dstdmat, re->re_dst_map); 1533 bus_dmamap_destroy(sc->sc_dstdmat, re->re_dst_map); 1534 } 1535 bus_dmamap_sync(sc->sc_srcdmat, re->re_src_map, BUS_DMASYNC_POSTWRITE); 1536 bus_dmamap_unload(sc->sc_srcdmat, re->re_src_map); 1537 bus_dmamap_destroy(sc->sc_srcdmat, re->re_src_map); 1538 1539 /* 1540 * If result was written to a differet mbuf chain, swap 1541 * it in as the return value and reclaim the original. 1542 */ 1543 if ((crp->crp_flags & CRYPTO_F_IMBUF) && re->re_src_m != re->re_dst_m) { 1544 m_freem(re->re_src_m); 1545 crp->crp_buf = (caddr_t)re->re_dst_m; 1546 } 1547 1548 if (re->re_flags & SAFE_QFLAGS_COPYOUTIV) { 1549 /* copy out IV for future use */ 1550 for (crd = crp->crp_desc; crd; crd = crd->crd_next) { 1551 int ivsize; 1552 1553 if (crd->crd_alg == CRYPTO_DES_CBC || 1554 crd->crd_alg == CRYPTO_3DES_CBC) { 1555 ivsize = 2*sizeof(u_int32_t); 1556 } else if (crd->crd_alg == CRYPTO_AES_CBC) { 1557 ivsize = 4*sizeof(u_int32_t); 1558 } else 1559 continue; 1560 crypto_copydata(crp->crp_flags, crp->crp_buf, 1561 crd->crd_skip + crd->crd_len - ivsize, ivsize, 1562 (caddr_t)sc->sc_sessions[re->re_sesn].ses_iv); 1563 break; 1564 } 1565 } 1566 1567 if (re->re_flags & SAFE_QFLAGS_COPYOUTICV) { 1568 /* copy out ICV result */ 1569 for (crd = crp->crp_desc; crd; crd = crd->crd_next) { 1570 if (!(crd->crd_alg == CRYPTO_MD5_HMAC || 1571 crd->crd_alg == CRYPTO_SHA1_HMAC || 1572 crd->crd_alg == CRYPTO_NULL_HMAC)) 1573 continue; 1574 if (crd->crd_alg == CRYPTO_SHA1_HMAC) { 1575 /* 1576 * SHA-1 ICV's are byte-swapped; fix 'em up 1577 * before copy them to their destination. 1578 */ 1579 re->re_sastate.sa_saved_indigest[0] = 1580 bswap32(re->re_sastate.sa_saved_indigest[0]); 1581 re->re_sastate.sa_saved_indigest[1] = 1582 bswap32(re->re_sastate.sa_saved_indigest[1]); 1583 re->re_sastate.sa_saved_indigest[2] = 1584 bswap32(re->re_sastate.sa_saved_indigest[2]); 1585 } 1586 crypto_copyback(crp->crp_flags, crp->crp_buf, 1587 crd->crd_inject, 1588 sc->sc_sessions[re->re_sesn].ses_mlen, 1589 (caddr_t)re->re_sastate.sa_saved_indigest); 1590 break; 1591 } 1592 } 1593 crypto_done(crp); 1594 } 1595 1596 /* 1597 * Copy all data past offset from srcm to dstm. 1598 */ 1599 static void 1600 safe_mcopy(struct mbuf *srcm, struct mbuf *dstm, u_int offset) 1601 { 1602 u_int j, dlen, slen; 1603 caddr_t dptr, sptr; 1604 1605 /* 1606 * Advance src and dst to offset. 1607 */ 1608 j = offset; 1609 while (j >= 0) { 1610 if (srcm->m_len > j) 1611 break; 1612 j -= srcm->m_len; 1613 srcm = srcm->m_next; 1614 if (srcm == NULL) 1615 return; 1616 } 1617 sptr = mtod(srcm, caddr_t) + j; 1618 slen = srcm->m_len - j; 1619 1620 j = offset; 1621 while (j >= 0) { 1622 if (dstm->m_len > j) 1623 break; 1624 j -= dstm->m_len; 1625 dstm = dstm->m_next; 1626 if (dstm == NULL) 1627 return; 1628 } 1629 dptr = mtod(dstm, caddr_t) + j; 1630 dlen = dstm->m_len - j; 1631 1632 /* 1633 * Copy everything that remains. 1634 */ 1635 for (;;) { 1636 j = min(slen, dlen); 1637 bcopy(sptr, dptr, j); 1638 if (slen == j) { 1639 srcm = srcm->m_next; 1640 if (srcm == NULL) 1641 return; 1642 sptr = srcm->m_data; 1643 slen = srcm->m_len; 1644 } else 1645 sptr += j, slen -= j; 1646 if (dlen == j) { 1647 dstm = dstm->m_next; 1648 if (dstm == NULL) 1649 return; 1650 dptr = dstm->m_data; 1651 dlen = dstm->m_len; 1652 } else 1653 dptr += j, dlen -= j; 1654 } 1655 } 1656 1657 #ifndef SAFE_NO_RNG 1658 #define SAFE_RNG_MAXWAIT 1000 1659 1660 static void 1661 safe_rng_init(struct safe_softc *sc) 1662 { 1663 u_int32_t w, v; 1664 int i; 1665 1666 WRITE_REG(sc, SAFE_RNG_CTRL, 0); 1667 /* use default value according to the manual */ 1668 WRITE_REG(sc, SAFE_RNG_CNFG, 0x834); /* magic from SafeNet */ 1669 WRITE_REG(sc, SAFE_RNG_ALM_CNT, 0); 1670 1671 /* 1672 * There is a bug in rev 1.0 of the 1140 that when the RNG 1673 * is brought out of reset the ready status flag does not 1674 * work until the RNG has finished its internal initialization. 1675 * 1676 * So in order to determine the device is through its 1677 * initialization we must read the data register, using the 1678 * status reg in the read in case it is initialized. Then read 1679 * the data register until it changes from the first read. 1680 * Once it changes read the data register until it changes 1681 * again. At this time the RNG is considered initialized. 1682 * This could take between 750ms - 1000ms in time. 1683 */ 1684 i = 0; 1685 w = READ_REG(sc, SAFE_RNG_OUT); 1686 do { 1687 v = READ_REG(sc, SAFE_RNG_OUT); 1688 if (v != w) { 1689 w = v; 1690 break; 1691 } 1692 DELAY(10); 1693 } while (++i < SAFE_RNG_MAXWAIT); 1694 1695 /* Wait Until data changes again */ 1696 i = 0; 1697 do { 1698 v = READ_REG(sc, SAFE_RNG_OUT); 1699 if (v != w) 1700 break; 1701 DELAY(10); 1702 } while (++i < SAFE_RNG_MAXWAIT); 1703 } 1704 1705 static __inline void 1706 safe_rng_disable_short_cycle(struct safe_softc *sc) 1707 { 1708 WRITE_REG(sc, SAFE_RNG_CTRL, 1709 READ_REG(sc, SAFE_RNG_CTRL) &~ SAFE_RNG_CTRL_SHORTEN); 1710 } 1711 1712 static __inline void 1713 safe_rng_enable_short_cycle(struct safe_softc *sc) 1714 { 1715 WRITE_REG(sc, SAFE_RNG_CTRL, 1716 READ_REG(sc, SAFE_RNG_CTRL) | SAFE_RNG_CTRL_SHORTEN); 1717 } 1718 1719 static __inline u_int32_t 1720 safe_rng_read(struct safe_softc *sc) 1721 { 1722 int i; 1723 1724 i = 0; 1725 while (READ_REG(sc, SAFE_RNG_STAT) != 0 && ++i < SAFE_RNG_MAXWAIT) 1726 ; 1727 return READ_REG(sc, SAFE_RNG_OUT); 1728 } 1729 1730 static void 1731 safe_rng(void *arg) 1732 { 1733 struct safe_softc *sc = arg; 1734 u_int32_t buf[SAFE_RNG_MAXBUFSIZ]; /* NB: maybe move to softc */ 1735 u_int maxwords; 1736 int i; 1737 1738 safestats.st_rng++; 1739 /* 1740 * Fetch the next block of data. 1741 */ 1742 maxwords = safe_rngbufsize; 1743 if (maxwords > SAFE_RNG_MAXBUFSIZ) 1744 maxwords = SAFE_RNG_MAXBUFSIZ; 1745 retry: 1746 for (i = 0; i < maxwords; i++) 1747 buf[i] = safe_rng_read(sc); 1748 /* 1749 * Check the comparator alarm count and reset the h/w if 1750 * it exceeds our threshold. This guards against the 1751 * hardware oscillators resonating with external signals. 1752 */ 1753 if (READ_REG(sc, SAFE_RNG_ALM_CNT) > safe_rngmaxalarm) { 1754 u_int32_t freq_inc, w; 1755 1756 DPRINTF(("%s: alarm count %u exceeds threshold %u\n", __func__, 1757 READ_REG(sc, SAFE_RNG_ALM_CNT), safe_rngmaxalarm)); 1758 safestats.st_rngalarm++; 1759 safe_rng_enable_short_cycle(sc); 1760 freq_inc = 18; 1761 for (i = 0; i < 64; i++) { 1762 w = READ_REG(sc, SAFE_RNG_CNFG); 1763 freq_inc = ((w + freq_inc) & 0x3fL); 1764 w = ((w & ~0x3fL) | freq_inc); 1765 WRITE_REG(sc, SAFE_RNG_CNFG, w); 1766 1767 WRITE_REG(sc, SAFE_RNG_ALM_CNT, 0); 1768 1769 (void) safe_rng_read(sc); 1770 DELAY(25); 1771 1772 if (READ_REG(sc, SAFE_RNG_ALM_CNT) == 0) { 1773 safe_rng_disable_short_cycle(sc); 1774 goto retry; 1775 } 1776 freq_inc = 1; 1777 } 1778 safe_rng_disable_short_cycle(sc); 1779 } else 1780 WRITE_REG(sc, SAFE_RNG_ALM_CNT, 0); 1781 1782 (*sc->sc_harvest)(sc->sc_rndtest, buf, maxwords*sizeof (u_int32_t)); 1783 callout_reset(&sc->sc_rngto, 1784 hz * (safe_rnginterval ? safe_rnginterval : 1), safe_rng, sc); 1785 } 1786 #endif /* SAFE_NO_RNG */ 1787 1788 static void 1789 safe_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1790 { 1791 bus_addr_t *paddr = (bus_addr_t*) arg; 1792 *paddr = segs->ds_addr; 1793 } 1794 1795 static int 1796 safe_dma_malloc( 1797 struct safe_softc *sc, 1798 bus_size_t size, 1799 struct safe_dma_alloc *dma, 1800 int mapflags 1801 ) 1802 { 1803 int r; 1804 1805 r = bus_dma_tag_create(NULL, /* parent */ 1806 sizeof(u_int32_t), 0, /* alignment, bounds */ 1807 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 1808 BUS_SPACE_MAXADDR, /* highaddr */ 1809 NULL, NULL, /* filter, filterarg */ 1810 size, /* maxsize */ 1811 1, /* nsegments */ 1812 size, /* maxsegsize */ 1813 BUS_DMA_ALLOCNOW, /* flags */ 1814 &dma->dma_tag); 1815 if (r != 0) { 1816 device_printf(sc->sc_dev, "safe_dma_malloc: " 1817 "bus_dma_tag_create failed; error %u\n", r); 1818 goto fail_0; 1819 } 1820 1821 r = bus_dmamap_create(dma->dma_tag, BUS_DMA_NOWAIT, &dma->dma_map); 1822 if (r != 0) { 1823 device_printf(sc->sc_dev, "safe_dma_malloc: " 1824 "bus_dmamap_create failed; error %u\n", r); 1825 goto fail_1; 1826 } 1827 1828 r = bus_dmamem_alloc(dma->dma_tag, (void**) &dma->dma_vaddr, 1829 BUS_DMA_NOWAIT, &dma->dma_map); 1830 if (r != 0) { 1831 device_printf(sc->sc_dev, "safe_dma_malloc: " 1832 "bus_dmammem_alloc failed; size %zu, error %u\n", 1833 size, r); 1834 goto fail_2; 1835 } 1836 1837 r = bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->dma_vaddr, 1838 size, 1839 safe_dmamap_cb, 1840 &dma->dma_paddr, 1841 mapflags | BUS_DMA_NOWAIT); 1842 if (r != 0) { 1843 device_printf(sc->sc_dev, "safe_dma_malloc: " 1844 "bus_dmamap_load failed; error %u\n", r); 1845 goto fail_3; 1846 } 1847 1848 dma->dma_size = size; 1849 return (0); 1850 1851 fail_3: 1852 bus_dmamap_unload(dma->dma_tag, dma->dma_map); 1853 fail_2: 1854 bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map); 1855 fail_1: 1856 bus_dmamap_destroy(dma->dma_tag, dma->dma_map); 1857 bus_dma_tag_destroy(dma->dma_tag); 1858 fail_0: 1859 dma->dma_map = NULL; 1860 dma->dma_tag = NULL; 1861 return (r); 1862 } 1863 1864 static void 1865 safe_dma_free(struct safe_softc *sc, struct safe_dma_alloc *dma) 1866 { 1867 bus_dmamap_unload(dma->dma_tag, dma->dma_map); 1868 bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map); 1869 bus_dmamap_destroy(dma->dma_tag, dma->dma_map); 1870 bus_dma_tag_destroy(dma->dma_tag); 1871 } 1872 1873 /* 1874 * Resets the board. Values in the regesters are left as is 1875 * from the reset (i.e. initial values are assigned elsewhere). 1876 */ 1877 static void 1878 safe_reset_board(struct safe_softc *sc) 1879 { 1880 u_int32_t v; 1881 /* 1882 * Reset the device. The manual says no delay 1883 * is needed between marking and clearing reset. 1884 */ 1885 v = READ_REG(sc, SAFE_PE_DMACFG) &~ 1886 (SAFE_PE_DMACFG_PERESET | SAFE_PE_DMACFG_PDRRESET | 1887 SAFE_PE_DMACFG_SGRESET); 1888 WRITE_REG(sc, SAFE_PE_DMACFG, v 1889 | SAFE_PE_DMACFG_PERESET 1890 | SAFE_PE_DMACFG_PDRRESET 1891 | SAFE_PE_DMACFG_SGRESET); 1892 WRITE_REG(sc, SAFE_PE_DMACFG, v); 1893 } 1894 1895 /* 1896 * Initialize registers we need to touch only once. 1897 */ 1898 static void 1899 safe_init_board(struct safe_softc *sc) 1900 { 1901 u_int32_t v, dwords; 1902 1903 v = READ_REG(sc, SAFE_PE_DMACFG); 1904 v &=~ SAFE_PE_DMACFG_PEMODE; 1905 v |= SAFE_PE_DMACFG_FSENA /* failsafe enable */ 1906 | SAFE_PE_DMACFG_GPRPCI /* gather ring on PCI */ 1907 | SAFE_PE_DMACFG_SPRPCI /* scatter ring on PCI */ 1908 | SAFE_PE_DMACFG_ESDESC /* endian-swap descriptors */ 1909 | SAFE_PE_DMACFG_ESSA /* endian-swap SA's */ 1910 | SAFE_PE_DMACFG_ESPDESC /* endian-swap part. desc's */ 1911 ; 1912 WRITE_REG(sc, SAFE_PE_DMACFG, v); 1913 #if 0 1914 /* XXX select byte swap based on host byte order */ 1915 WRITE_REG(sc, SAFE_ENDIAN, 0x1b); 1916 #endif 1917 if (sc->sc_chiprev == SAFE_REV(1,0)) { 1918 /* 1919 * Avoid large PCI DMA transfers. Rev 1.0 has a bug where 1920 * "target mode transfers" done while the chip is DMA'ing 1921 * >1020 bytes cause the hardware to lockup. To avoid this 1922 * we reduce the max PCI transfer size and use small source 1923 * particle descriptors (<= 256 bytes). 1924 */ 1925 WRITE_REG(sc, SAFE_DMA_CFG, 256); 1926 device_printf(sc->sc_dev, 1927 "Reduce max DMA size to %u words for rev %u.%u WAR\n", 1928 (READ_REG(sc, SAFE_DMA_CFG)>>2) & 0xff, 1929 SAFE_REV_MAJ(sc->sc_chiprev), 1930 SAFE_REV_MIN(sc->sc_chiprev)); 1931 } 1932 1933 /* NB: operands+results are overlaid */ 1934 WRITE_REG(sc, SAFE_PE_PDRBASE, sc->sc_ringalloc.dma_paddr); 1935 WRITE_REG(sc, SAFE_PE_RDRBASE, sc->sc_ringalloc.dma_paddr); 1936 /* 1937 * Configure ring entry size and number of items in the ring. 1938 */ 1939 KASSERT((sizeof(struct safe_ringentry) % sizeof(u_int32_t)) == 0, 1940 ("PE ring entry not 32-bit aligned!")); 1941 dwords = sizeof(struct safe_ringentry) / sizeof(u_int32_t); 1942 WRITE_REG(sc, SAFE_PE_RINGCFG, 1943 (dwords << SAFE_PE_RINGCFG_OFFSET_S) | SAFE_MAX_NQUEUE); 1944 WRITE_REG(sc, SAFE_PE_RINGPOLL, 0); /* disable polling */ 1945 1946 WRITE_REG(sc, SAFE_PE_GRNGBASE, sc->sc_spalloc.dma_paddr); 1947 WRITE_REG(sc, SAFE_PE_SRNGBASE, sc->sc_dpalloc.dma_paddr); 1948 WRITE_REG(sc, SAFE_PE_PARTSIZE, 1949 (SAFE_TOTAL_DPART<<16) | SAFE_TOTAL_SPART); 1950 /* 1951 * NB: destination particles are fixed size. We use 1952 * an mbuf cluster and require all results go to 1953 * clusters or smaller. 1954 */ 1955 WRITE_REG(sc, SAFE_PE_PARTCFG, SAFE_MAX_DSIZE); 1956 1957 /* it's now safe to enable PE mode, do it */ 1958 WRITE_REG(sc, SAFE_PE_DMACFG, v | SAFE_PE_DMACFG_PEMODE); 1959 1960 /* 1961 * Configure hardware to use level-triggered interrupts and 1962 * to interrupt after each descriptor is processed. 1963 */ 1964 WRITE_REG(sc, SAFE_HI_CFG, SAFE_HI_CFG_LEVEL); 1965 WRITE_REG(sc, SAFE_HI_DESC_CNT, 1); 1966 WRITE_REG(sc, SAFE_HI_MASK, SAFE_INT_PE_DDONE | SAFE_INT_PE_ERROR); 1967 } 1968 1969 /* 1970 * Init PCI registers 1971 */ 1972 static void 1973 safe_init_pciregs(device_t dev) 1974 { 1975 } 1976 1977 /* 1978 * Clean up after a chip crash. 1979 * It is assumed that the caller in splimp() 1980 */ 1981 static void 1982 safe_cleanchip(struct safe_softc *sc) 1983 { 1984 1985 if (sc->sc_nqchip != 0) { 1986 struct safe_ringentry *re = sc->sc_back; 1987 1988 while (re != sc->sc_front) { 1989 if (re->re_desc.d_csr != 0) 1990 safe_free_entry(sc, re); 1991 if (++re == sc->sc_ringtop) 1992 re = sc->sc_ring; 1993 } 1994 sc->sc_back = re; 1995 sc->sc_nqchip = 0; 1996 } 1997 } 1998 1999 /* 2000 * free a safe_q 2001 * It is assumed that the caller is within splimp(). 2002 */ 2003 static int 2004 safe_free_entry(struct safe_softc *sc, struct safe_ringentry *re) 2005 { 2006 struct cryptop *crp; 2007 2008 /* 2009 * Free header MCR 2010 */ 2011 if ((re->re_dst_m != NULL) && (re->re_src_m != re->re_dst_m)) 2012 m_freem(re->re_dst_m); 2013 2014 crp = (struct cryptop *)re->re_crp; 2015 2016 re->re_desc.d_csr = 0; 2017 2018 crp->crp_etype = EFAULT; 2019 crypto_done(crp); 2020 return(0); 2021 } 2022 2023 /* 2024 * Routine to reset the chip and clean up. 2025 * It is assumed that the caller is in splimp() 2026 */ 2027 static void 2028 safe_totalreset(struct safe_softc *sc) 2029 { 2030 safe_reset_board(sc); 2031 safe_init_board(sc); 2032 safe_cleanchip(sc); 2033 } 2034 2035 /* 2036 * Is the operand suitable aligned for direct DMA. Each 2037 * segment must be aligned on a 32-bit boundary and all 2038 * but the last segment must be a multiple of 4 bytes. 2039 */ 2040 static int 2041 safe_dmamap_aligned(const struct safe_operand *op) 2042 { 2043 int i; 2044 2045 for (i = 0; i < op->nsegs; i++) { 2046 if (op->segs[i].ds_addr & 3) 2047 return (0); 2048 if (i != (op->nsegs - 1) && (op->segs[i].ds_len & 3)) 2049 return (0); 2050 } 2051 return (1); 2052 } 2053 2054 /* 2055 * Is the operand suitable for direct DMA as the destination 2056 * of an operation. The hardware requires that each ``particle'' 2057 * but the last in an operation result have the same size. We 2058 * fix that size at SAFE_MAX_DSIZE bytes. This routine returns 2059 * 0 if some segment is not a multiple of of this size, 1 if all 2060 * segments are exactly this size, or 2 if segments are at worst 2061 * a multple of this size. 2062 */ 2063 static int 2064 safe_dmamap_uniform(const struct safe_operand *op) 2065 { 2066 int result = 1; 2067 2068 if (op->nsegs > 0) { 2069 int i; 2070 2071 for (i = 0; i < op->nsegs-1; i++) { 2072 if (op->segs[i].ds_len % SAFE_MAX_DSIZE) 2073 return (0); 2074 if (op->segs[i].ds_len != SAFE_MAX_DSIZE) 2075 result = 2; 2076 } 2077 } 2078 return (result); 2079 } 2080 2081 #ifdef SAFE_DEBUG 2082 static void 2083 safe_dump_dmastatus(struct safe_softc *sc, const char *tag) 2084 { 2085 kprintf("%s: ENDIAN 0x%x SRC 0x%x DST 0x%x STAT 0x%x\n" 2086 , tag 2087 , READ_REG(sc, SAFE_DMA_ENDIAN) 2088 , READ_REG(sc, SAFE_DMA_SRCADDR) 2089 , READ_REG(sc, SAFE_DMA_DSTADDR) 2090 , READ_REG(sc, SAFE_DMA_STAT) 2091 ); 2092 } 2093 2094 static void 2095 safe_dump_intrstate(struct safe_softc *sc, const char *tag) 2096 { 2097 kprintf("%s: HI_CFG 0x%x HI_MASK 0x%x HI_DESC_CNT 0x%x HU_STAT 0x%x HM_STAT 0x%x\n" 2098 , tag 2099 , READ_REG(sc, SAFE_HI_CFG) 2100 , READ_REG(sc, SAFE_HI_MASK) 2101 , READ_REG(sc, SAFE_HI_DESC_CNT) 2102 , READ_REG(sc, SAFE_HU_STAT) 2103 , READ_REG(sc, SAFE_HM_STAT) 2104 ); 2105 } 2106 2107 static void 2108 safe_dump_ringstate(struct safe_softc *sc, const char *tag) 2109 { 2110 u_int32_t estat = READ_REG(sc, SAFE_PE_ERNGSTAT); 2111 2112 /* NB: assume caller has lock on ring */ 2113 kprintf("%s: ERNGSTAT %x (next %u) back %lu front %lu\n", 2114 tag, 2115 estat, (estat >> SAFE_PE_ERNGSTAT_NEXT_S), 2116 (unsigned long)(sc->sc_back - sc->sc_ring), 2117 (unsigned long)(sc->sc_front - sc->sc_ring)); 2118 } 2119 2120 static void 2121 safe_dump_request(struct safe_softc *sc, const char* tag, struct safe_ringentry *re) 2122 { 2123 int ix, nsegs; 2124 2125 ix = re - sc->sc_ring; 2126 kprintf("%s: %p (%u): csr %x src %x dst %x sa %x len %x\n" 2127 , tag 2128 , re, ix 2129 , re->re_desc.d_csr 2130 , re->re_desc.d_src 2131 , re->re_desc.d_dst 2132 , re->re_desc.d_sa 2133 , re->re_desc.d_len 2134 ); 2135 if (re->re_src.nsegs > 1) { 2136 ix = (re->re_desc.d_src - sc->sc_spalloc.dma_paddr) / 2137 sizeof(struct safe_pdesc); 2138 for (nsegs = re->re_src.nsegs; nsegs; nsegs--) { 2139 kprintf(" spd[%u] %p: %p size %u flags %x" 2140 , ix, &sc->sc_spring[ix] 2141 , (caddr_t)(uintptr_t) sc->sc_spring[ix].pd_addr 2142 , sc->sc_spring[ix].pd_size 2143 , sc->sc_spring[ix].pd_flags 2144 ); 2145 if (sc->sc_spring[ix].pd_size == 0) 2146 kprintf(" (zero!)"); 2147 kprintf("\n"); 2148 if (++ix == SAFE_TOTAL_SPART) 2149 ix = 0; 2150 } 2151 } 2152 if (re->re_dst.nsegs > 1) { 2153 ix = (re->re_desc.d_dst - sc->sc_dpalloc.dma_paddr) / 2154 sizeof(struct safe_pdesc); 2155 for (nsegs = re->re_dst.nsegs; nsegs; nsegs--) { 2156 kprintf(" dpd[%u] %p: %p flags %x\n" 2157 , ix, &sc->sc_dpring[ix] 2158 , (caddr_t)(uintptr_t) sc->sc_dpring[ix].pd_addr 2159 , sc->sc_dpring[ix].pd_flags 2160 ); 2161 if (++ix == SAFE_TOTAL_DPART) 2162 ix = 0; 2163 } 2164 } 2165 kprintf("sa: cmd0 %08x cmd1 %08x staterec %x\n", 2166 re->re_sa.sa_cmd0, re->re_sa.sa_cmd1, re->re_sa.sa_staterec); 2167 kprintf("sa: key %x %x %x %x %x %x %x %x\n" 2168 , re->re_sa.sa_key[0] 2169 , re->re_sa.sa_key[1] 2170 , re->re_sa.sa_key[2] 2171 , re->re_sa.sa_key[3] 2172 , re->re_sa.sa_key[4] 2173 , re->re_sa.sa_key[5] 2174 , re->re_sa.sa_key[6] 2175 , re->re_sa.sa_key[7] 2176 ); 2177 kprintf("sa: indigest %x %x %x %x %x\n" 2178 , re->re_sa.sa_indigest[0] 2179 , re->re_sa.sa_indigest[1] 2180 , re->re_sa.sa_indigest[2] 2181 , re->re_sa.sa_indigest[3] 2182 , re->re_sa.sa_indigest[4] 2183 ); 2184 kprintf("sa: outdigest %x %x %x %x %x\n" 2185 , re->re_sa.sa_outdigest[0] 2186 , re->re_sa.sa_outdigest[1] 2187 , re->re_sa.sa_outdigest[2] 2188 , re->re_sa.sa_outdigest[3] 2189 , re->re_sa.sa_outdigest[4] 2190 ); 2191 kprintf("sr: iv %x %x %x %x\n" 2192 , re->re_sastate.sa_saved_iv[0] 2193 , re->re_sastate.sa_saved_iv[1] 2194 , re->re_sastate.sa_saved_iv[2] 2195 , re->re_sastate.sa_saved_iv[3] 2196 ); 2197 kprintf("sr: hashbc %u indigest %x %x %x %x %x\n" 2198 , re->re_sastate.sa_saved_hashbc 2199 , re->re_sastate.sa_saved_indigest[0] 2200 , re->re_sastate.sa_saved_indigest[1] 2201 , re->re_sastate.sa_saved_indigest[2] 2202 , re->re_sastate.sa_saved_indigest[3] 2203 , re->re_sastate.sa_saved_indigest[4] 2204 ); 2205 } 2206 2207 static void 2208 safe_dump_ring(struct safe_softc *sc, const char *tag) 2209 { 2210 lockmgr(&sc->sc_ringlock, LK_EXCLUSIVE); 2211 kprintf("\nSafeNet Ring State:\n"); 2212 safe_dump_intrstate(sc, tag); 2213 safe_dump_dmastatus(sc, tag); 2214 safe_dump_ringstate(sc, tag); 2215 if (sc->sc_nqchip) { 2216 struct safe_ringentry *re = sc->sc_back; 2217 do { 2218 safe_dump_request(sc, tag, re); 2219 if (++re == sc->sc_ringtop) 2220 re = sc->sc_ring; 2221 } while (re != sc->sc_front); 2222 } 2223 lockmgr(&sc->sc_ringlock, LK_RELEASE); 2224 } 2225 2226 static int 2227 sysctl_hw_safe_dump(SYSCTL_HANDLER_ARGS) 2228 { 2229 char dmode[64]; 2230 int error; 2231 2232 strncpy(dmode, "", sizeof(dmode) - 1); 2233 dmode[sizeof(dmode) - 1] = '\0'; 2234 error = sysctl_handle_string(oidp, &dmode[0], sizeof(dmode), req); 2235 2236 if (error == 0 && req->newptr != NULL) { 2237 struct safe_softc *sc = safec; 2238 2239 if (!sc) 2240 return EINVAL; 2241 if (strncmp(dmode, "dma", 3) == 0) 2242 safe_dump_dmastatus(sc, "safe0"); 2243 else if (strncmp(dmode, "int", 3) == 0) 2244 safe_dump_intrstate(sc, "safe0"); 2245 else if (strncmp(dmode, "ring", 4) == 0) 2246 safe_dump_ring(sc, "safe0"); 2247 else 2248 return EINVAL; 2249 } 2250 return error; 2251 } 2252 SYSCTL_PROC(_hw_safe, OID_AUTO, dump, CTLTYPE_STRING | CTLFLAG_RW, 2253 0, 0, sysctl_hw_safe_dump, "A", "Dump driver state"); 2254 #endif /* SAFE_DEBUG */ 2255