f26d7b7750ee64b68b17c42c4f41c46bb405babd
[dragonfly.git] / sys / dev / crypto / ubsec / ubsec.c
1 /* $FreeBSD: src/sys/dev/ubsec/ubsec.c,v 1.6.2.12 2003/06/04 17:56:59 sam Exp $ */
2 /* $DragonFly: src/sys/dev/crypto/ubsec/ubsec.c,v 1.13 2006/12/22 23:26:15 swildner Exp $ */
3 /*      $OpenBSD: ubsec.c,v 1.115 2002/09/24 18:33:26 jason Exp $       */
4
5 /*
6  * Copyright (c) 2000 Jason L. Wright (jason@thought.net)
7  * Copyright (c) 2000 Theo de Raadt (deraadt@openbsd.org)
8  * Copyright (c) 2001 Patrik Lindergren (patrik@ipunplugged.com)
9  * 
10  * All rights reserved.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in the
19  *    documentation and/or other materials provided with the distribution.
20  * 3. All advertising materials mentioning features or use of this software
21  *    must display the following acknowledgement:
22  *      This product includes software developed by Jason L. Wright
23  * 4. The name of the author may not be used to endorse or promote products
24  *    derived from this software without specific prior written permission.
25  *
26  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
28  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
29  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
30  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
31  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
32  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
34  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
35  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36  * POSSIBILITY OF SUCH DAMAGE.
37  *
38  * Effort sponsored in part by the Defense Advanced Research Projects
39  * Agency (DARPA) and Air Force Research Laboratory, Air Force
40  * Materiel Command, USAF, under agreement number F30602-01-2-0537.
41  *
42  */
43
44 /*
45  * uBsec 5[56]01, 58xx hardware crypto accelerator
46  */
47
48 #include "opt_ubsec.h"
49
50 #include <sys/param.h>
51 #include <sys/systm.h>
52 #include <sys/proc.h>
53 #include <sys/errno.h>
54 #include <sys/malloc.h>
55 #include <sys/kernel.h>
56 #include <sys/mbuf.h>
57 #include <sys/sysctl.h>
58 #include <sys/endian.h>
59 #include <sys/bus.h>
60 #include <sys/rman.h>
61 #include <sys/md5.h>
62 #include <sys/random.h>
63 #include <sys/thread2.h>
64
65 #include <vm/vm.h>
66 #include <vm/pmap.h>
67
68 #include <machine/clock.h>
69
70 #include <crypto/sha1.h>
71 #include <opencrypto/cryptodev.h>
72 #include <opencrypto/cryptosoft.h>
73
74 #include <bus/pci/pcivar.h>
75 #include <bus/pci/pcireg.h>
76
77 /* grr, #defines for gratuitous incompatibility in queue.h */
78 #define SIMPLEQ_HEAD            STAILQ_HEAD
79 #define SIMPLEQ_ENTRY           STAILQ_ENTRY
80 #define SIMPLEQ_INIT            STAILQ_INIT
81 #define SIMPLEQ_INSERT_TAIL     STAILQ_INSERT_TAIL
82 #define SIMPLEQ_EMPTY           STAILQ_EMPTY
83 #define SIMPLEQ_FIRST           STAILQ_FIRST
84 #define SIMPLEQ_REMOVE_HEAD     STAILQ_REMOVE_HEAD_UNTIL
85 #define SIMPLEQ_FOREACH         STAILQ_FOREACH
86 /* ditto for endian.h */
87 #define letoh16(x)              le16toh(x)
88 #define letoh32(x)              le32toh(x)
89
90 #ifdef UBSEC_RNDTEST
91 #include "../rndtest/rndtest.h"
92 #endif
93 #include "ubsecreg.h"
94 #include "ubsecvar.h"
95
96 /*
97  * Prototypes and count for the pci_device structure
98  */
99 static  int ubsec_probe(device_t);
100 static  int ubsec_attach(device_t);
101 static  int ubsec_detach(device_t);
102 static  int ubsec_suspend(device_t);
103 static  int ubsec_resume(device_t);
104 static  void ubsec_shutdown(device_t);
105
106 static device_method_t ubsec_methods[] = {
107         /* Device interface */
108         DEVMETHOD(device_probe,         ubsec_probe),
109         DEVMETHOD(device_attach,        ubsec_attach),
110         DEVMETHOD(device_detach,        ubsec_detach),
111         DEVMETHOD(device_suspend,       ubsec_suspend),
112         DEVMETHOD(device_resume,        ubsec_resume),
113         DEVMETHOD(device_shutdown,      ubsec_shutdown),
114
115         /* bus interface */
116         DEVMETHOD(bus_print_child,      bus_generic_print_child),
117         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
118
119         { 0, 0 }
120 };
121 static driver_t ubsec_driver = {
122         "ubsec",
123         ubsec_methods,
124         sizeof (struct ubsec_softc)
125 };
126 static devclass_t ubsec_devclass;
127
128 DECLARE_DUMMY_MODULE(ubsec);
129 DRIVER_MODULE(ubsec, pci, ubsec_driver, ubsec_devclass, 0, 0);
130 MODULE_DEPEND(ubsec, crypto, 1, 1, 1);
131 #ifdef UBSEC_RNDTEST
132 MODULE_DEPEND(ubsec, rndtest, 1, 1, 1);
133 #endif
134
135 static  void ubsec_intr(void *);
136 static  int ubsec_newsession(void *, u_int32_t *, struct cryptoini *);
137 static  int ubsec_freesession(void *, u_int64_t);
138 static  int ubsec_process(void *, struct cryptop *, int);
139 static  void ubsec_callback(struct ubsec_softc *, struct ubsec_q *);
140 static  void ubsec_feed(struct ubsec_softc *);
141 static  void ubsec_mcopy(struct mbuf *, struct mbuf *, int, int);
142 static  void ubsec_callback2(struct ubsec_softc *, struct ubsec_q2 *);
143 static  int ubsec_feed2(struct ubsec_softc *);
144 static  void ubsec_rng(void *);
145 static  int ubsec_dma_malloc(struct ubsec_softc *, bus_size_t,
146                              struct ubsec_dma_alloc *, int);
147 #define ubsec_dma_sync(_dma, _flags) \
148         bus_dmamap_sync((_dma)->dma_tag, (_dma)->dma_map, (_flags))
149 static  void ubsec_dma_free(struct ubsec_softc *, struct ubsec_dma_alloc *);
150 static  int ubsec_dmamap_aligned(struct ubsec_operand *op);
151
152 static  void ubsec_reset_board(struct ubsec_softc *sc);
153 static  void ubsec_init_board(struct ubsec_softc *sc);
154 static  void ubsec_init_pciregs(device_t dev);
155 static  void ubsec_totalreset(struct ubsec_softc *sc);
156
157 static  int ubsec_free_q(struct ubsec_softc *sc, struct ubsec_q *q);
158
159 static  int ubsec_kprocess(void*, struct cryptkop *, int);
160 static  int ubsec_kprocess_modexp_hw(struct ubsec_softc *, struct cryptkop *, int);
161 static  int ubsec_kprocess_modexp_sw(struct ubsec_softc *, struct cryptkop *, int);
162 static  int ubsec_kprocess_rsapriv(struct ubsec_softc *, struct cryptkop *, int);
163 static  void ubsec_kfree(struct ubsec_softc *, struct ubsec_q2 *);
164 static  int ubsec_ksigbits(struct crparam *);
165 static  void ubsec_kshift_r(u_int, u_int8_t *, u_int, u_int8_t *, u_int);
166 static  void ubsec_kshift_l(u_int, u_int8_t *, u_int, u_int8_t *, u_int);
167
168 SYSCTL_NODE(_hw, OID_AUTO, ubsec, CTLFLAG_RD, 0, "Broadcom driver parameters");
169
170 #ifdef UBSEC_DEBUG
171 static  void ubsec_dump_pb(volatile struct ubsec_pktbuf *);
172 static  void ubsec_dump_mcr(struct ubsec_mcr *);
173 static  void ubsec_dump_ctx2(struct ubsec_ctx_keyop *);
174
175 static  int ubsec_debug = 0;
176 SYSCTL_INT(_hw_ubsec, OID_AUTO, debug, CTLFLAG_RW, &ubsec_debug,
177             0, "control debugging msgs");
178 #endif
179
180 #define READ_REG(sc,r) \
181         bus_space_read_4((sc)->sc_st, (sc)->sc_sh, (r))
182
183 #define WRITE_REG(sc,reg,val) \
184         bus_space_write_4((sc)->sc_st, (sc)->sc_sh, reg, val)
185
186 #define SWAP32(x) (x) = htole32(ntohl((x)))
187 #define HTOLE32(x) (x) = htole32(x)
188
189
190 struct ubsec_stats ubsecstats;
191 SYSCTL_STRUCT(_hw_ubsec, OID_AUTO, stats, CTLFLAG_RD, &ubsecstats,
192             ubsec_stats, "driver statistics");
193
194 static int
195 ubsec_probe(device_t dev)
196 {
197         if (pci_get_vendor(dev) == PCI_VENDOR_SUN &&
198             (pci_get_device(dev) == PCI_PRODUCT_SUN_5821 ||
199              pci_get_device(dev) == PCI_PRODUCT_SUN_SCA1K))
200                 return (0);
201         if (pci_get_vendor(dev) == PCI_VENDOR_BLUESTEEL &&
202             (pci_get_device(dev) == PCI_PRODUCT_BLUESTEEL_5501 ||
203              pci_get_device(dev) == PCI_PRODUCT_BLUESTEEL_5601))
204                 return (0);
205         if (pci_get_vendor(dev) == PCI_VENDOR_BROADCOM &&
206             (pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5801 ||
207              pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5802 ||
208              pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5805 ||
209              pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5820 ||
210              pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5821 ||
211              pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5822 ||
212              pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5823
213              ))
214                 return (0);
215         return (ENXIO);
216 }
217
218 static const char*
219 ubsec_partname(struct ubsec_softc *sc)
220 {
221         /* XXX sprintf numbers when not decoded */
222         switch (pci_get_vendor(sc->sc_dev)) {
223         case PCI_VENDOR_BROADCOM:
224                 switch (pci_get_device(sc->sc_dev)) {
225                 case PCI_PRODUCT_BROADCOM_5801: return "Broadcom 5801";
226                 case PCI_PRODUCT_BROADCOM_5802: return "Broadcom 5802";
227                 case PCI_PRODUCT_BROADCOM_5805: return "Broadcom 5805";
228                 case PCI_PRODUCT_BROADCOM_5820: return "Broadcom 5820";
229                 case PCI_PRODUCT_BROADCOM_5821: return "Broadcom 5821";
230                 case PCI_PRODUCT_BROADCOM_5822: return "Broadcom 5822";
231                 case PCI_PRODUCT_BROADCOM_5823: return "Broadcom 5823";
232                 }
233                 return "Broadcom unknown-part";
234         case PCI_VENDOR_BLUESTEEL:
235                 switch (pci_get_device(sc->sc_dev)) {
236                 case PCI_PRODUCT_BLUESTEEL_5601: return "Bluesteel 5601";
237                 }
238                 return "Bluesteel unknown-part";
239         case PCI_VENDOR_SUN:
240                 switch (pci_get_device(sc->sc_dev)) {
241                 case PCI_PRODUCT_SUN_5821: return "Sun Crypto 5821";
242                 case PCI_PRODUCT_SUN_SCA1K: return "Sun Crypto 1K";
243                 }
244                 return "Sun unknown-part";
245         }
246         return "Unknown-vendor unknown-part";
247 }
248
249 static void
250 default_harvest(struct rndtest_state *rsp, void *buf, u_int count)
251 {
252         u_int32_t *p = (u_int32_t *)buf;
253         for (count /= sizeof (u_int32_t); count; count--)
254                 add_true_randomness(*p++);
255 }
256
257 static int
258 ubsec_attach(device_t dev)
259 {
260         struct ubsec_softc *sc = device_get_softc(dev);
261         struct ubsec_dma *dmap;
262         u_int32_t cmd, i;
263         int rid;
264
265         KASSERT(sc != NULL, ("ubsec_attach: null software carrier!"));
266         bzero(sc, sizeof (*sc));
267         sc->sc_dev = dev;
268
269         SIMPLEQ_INIT(&sc->sc_queue);
270         SIMPLEQ_INIT(&sc->sc_qchip);
271         SIMPLEQ_INIT(&sc->sc_queue2);
272         SIMPLEQ_INIT(&sc->sc_qchip2);
273         SIMPLEQ_INIT(&sc->sc_q2free);
274
275         /* XXX handle power management */
276
277         sc->sc_statmask = BS_STAT_MCR1_DONE | BS_STAT_DMAERR;
278
279         if (pci_get_vendor(dev) == PCI_VENDOR_BLUESTEEL &&
280             pci_get_device(dev) == PCI_PRODUCT_BLUESTEEL_5601)
281                 sc->sc_flags |= UBS_FLAGS_KEY | UBS_FLAGS_RNG;
282
283         if (pci_get_vendor(dev) == PCI_VENDOR_BROADCOM &&
284             (pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5802 ||
285              pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5805))
286                 sc->sc_flags |= UBS_FLAGS_KEY | UBS_FLAGS_RNG;
287
288         if (pci_get_vendor(dev) == PCI_VENDOR_BROADCOM &&
289             pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5820)
290                 sc->sc_flags |= UBS_FLAGS_KEY | UBS_FLAGS_RNG |
291                     UBS_FLAGS_LONGCTX | UBS_FLAGS_HWNORM | UBS_FLAGS_BIGKEY;
292
293         if ((pci_get_vendor(dev) == PCI_VENDOR_BROADCOM &&
294              (pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5821 ||
295               pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5822 ||
296               pci_get_device(dev) == PCI_PRODUCT_BROADCOM_5823)) ||
297             (pci_get_vendor(dev) == PCI_VENDOR_SUN &&
298              (pci_get_device(dev) == PCI_PRODUCT_SUN_SCA1K ||
299               pci_get_device(dev) == PCI_PRODUCT_SUN_5821))) {
300                 /* NB: the 5821/5822 defines some additional status bits */
301                 sc->sc_statmask |= BS_STAT_MCR1_ALLEMPTY |
302                     BS_STAT_MCR2_ALLEMPTY;
303                 sc->sc_flags |= UBS_FLAGS_KEY | UBS_FLAGS_RNG |
304                     UBS_FLAGS_LONGCTX | UBS_FLAGS_HWNORM | UBS_FLAGS_BIGKEY;
305         }
306  
307         cmd = pci_read_config(dev, PCIR_COMMAND, 4);
308         cmd |= PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN;
309         pci_write_config(dev, PCIR_COMMAND, cmd, 4);
310         cmd = pci_read_config(dev, PCIR_COMMAND, 4);
311
312         if (!(cmd & PCIM_CMD_MEMEN)) {
313                 device_printf(dev, "failed to enable memory mapping\n");
314                 goto bad;
315         }
316
317         if (!(cmd & PCIM_CMD_BUSMASTEREN)) {
318                 device_printf(dev, "failed to enable bus mastering\n");
319                 goto bad;
320         }
321
322         /* 
323          * Setup memory-mapping of PCI registers.
324          */
325         rid = BS_BAR;
326         sc->sc_sr = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
327                                        0, ~0, 1, RF_ACTIVE);
328         if (sc->sc_sr == NULL) {
329                 device_printf(dev, "cannot map register space\n");
330                 goto bad;
331         }
332         sc->sc_st = rman_get_bustag(sc->sc_sr);
333         sc->sc_sh = rman_get_bushandle(sc->sc_sr);
334
335         /*
336          * Arrange interrupt line.
337          */
338         rid = 0;
339         sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
340                                         0, ~0, 1, RF_SHAREABLE|RF_ACTIVE);
341         if (sc->sc_irq == NULL) {
342                 device_printf(dev, "could not map interrupt\n");
343                 goto bad1;
344         }
345         /*
346          * NB: Network code assumes we are blocked with splimp()
347          *     so make sure the IRQ is mapped appropriately.
348          */
349         if (bus_setup_intr(dev, sc->sc_irq, 0,
350                            ubsec_intr, sc, 
351                            &sc->sc_ih, NULL)) {
352                 device_printf(dev, "could not establish interrupt\n");
353                 goto bad2;
354         }
355
356         sc->sc_cid = crypto_get_driverid(0);
357         if (sc->sc_cid < 0) {
358                 device_printf(dev, "could not get crypto driver id\n");
359                 goto bad3;
360         }
361
362         /*
363          * Setup DMA descriptor area.
364          */
365         if (bus_dma_tag_create(NULL,                    /* parent */
366                                1, 0,                    /* alignment, bounds */
367                                BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
368                                BUS_SPACE_MAXADDR,       /* highaddr */
369                                NULL, NULL,              /* filter, filterarg */
370                                0x3ffff,                 /* maxsize */
371                                UBS_MAX_SCATTER,         /* nsegments */
372                                0xffff,                  /* maxsegsize */
373                                BUS_DMA_ALLOCNOW,        /* flags */
374                                &sc->sc_dmat)) {
375                 device_printf(dev, "cannot allocate DMA tag\n");
376                 goto bad4;
377         }
378         SIMPLEQ_INIT(&sc->sc_freequeue);
379         dmap = sc->sc_dmaa;
380         for (i = 0; i < UBS_MAX_NQUEUE; i++, dmap++) {
381                 struct ubsec_q *q;
382
383                 q = kmalloc(sizeof(struct ubsec_q), M_DEVBUF, M_WAITOK);
384                 if (ubsec_dma_malloc(sc, sizeof(struct ubsec_dmachunk),
385                     &dmap->d_alloc, 0)) {
386                         device_printf(dev, "cannot allocate dma buffers\n");
387                         kfree(q, M_DEVBUF);
388                         break;
389                 }
390                 dmap->d_dma = (struct ubsec_dmachunk *)dmap->d_alloc.dma_vaddr;
391
392                 q->q_dma = dmap;
393                 sc->sc_queuea[i] = q;
394
395                 SIMPLEQ_INSERT_TAIL(&sc->sc_freequeue, q, q_next);
396         }
397
398         device_printf(sc->sc_dev, "%s\n", ubsec_partname(sc));
399
400         crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0,
401             ubsec_newsession, ubsec_freesession, ubsec_process, sc);
402         crypto_register(sc->sc_cid, CRYPTO_DES_CBC, 0, 0,
403              ubsec_newsession, ubsec_freesession, ubsec_process, sc);
404         crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0,
405              ubsec_newsession, ubsec_freesession, ubsec_process, sc);
406         crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0,
407              ubsec_newsession, ubsec_freesession, ubsec_process, sc);
408
409         /*
410          * Reset Broadcom chip
411          */
412         ubsec_reset_board(sc);
413
414         /*
415          * Init Broadcom specific PCI settings
416          */
417         ubsec_init_pciregs(dev);
418
419         /*
420          * Init Broadcom chip
421          */
422         ubsec_init_board(sc);
423
424 #ifndef UBSEC_NO_RNG
425         if (sc->sc_flags & UBS_FLAGS_RNG) {
426                 sc->sc_statmask |= BS_STAT_MCR2_DONE;
427 #ifdef UBSEC_RNDTEST
428                 sc->sc_rndtest = rndtest_attach(dev);
429                 if (sc->sc_rndtest)
430                         sc->sc_harvest = rndtest_harvest;
431                 else
432                         sc->sc_harvest = default_harvest;
433 #else
434                 sc->sc_harvest = default_harvest;
435 #endif
436
437                 if (ubsec_dma_malloc(sc, sizeof(struct ubsec_mcr),
438                     &sc->sc_rng.rng_q.q_mcr, 0))
439                         goto skip_rng;
440
441                 if (ubsec_dma_malloc(sc, sizeof(struct ubsec_ctx_rngbypass),
442                     &sc->sc_rng.rng_q.q_ctx, 0)) {
443                         ubsec_dma_free(sc, &sc->sc_rng.rng_q.q_mcr);
444                         goto skip_rng;
445                 }
446
447                 if (ubsec_dma_malloc(sc, sizeof(u_int32_t) *
448                     UBSEC_RNG_BUFSIZ, &sc->sc_rng.rng_buf, 0)) {
449                         ubsec_dma_free(sc, &sc->sc_rng.rng_q.q_ctx);
450                         ubsec_dma_free(sc, &sc->sc_rng.rng_q.q_mcr);
451                         goto skip_rng;
452                 }
453
454                 if (hz >= 100)
455                         sc->sc_rnghz = hz / 100;
456                 else
457                         sc->sc_rnghz = 1;
458                 callout_init(&sc->sc_rngto);
459                 callout_reset(&sc->sc_rngto, sc->sc_rnghz, ubsec_rng, sc);
460 skip_rng:
461         ;
462         }
463 #endif /* UBSEC_NO_RNG */
464
465         if (sc->sc_flags & UBS_FLAGS_KEY) {
466                 sc->sc_statmask |= BS_STAT_MCR2_DONE;
467
468                 crypto_kregister(sc->sc_cid, CRK_MOD_EXP, 0,
469                         ubsec_kprocess, sc);
470 #if 0
471                 crypto_kregister(sc->sc_cid, CRK_MOD_EXP_CRT, 0,
472                         ubsec_kprocess, sc);
473 #endif
474         }
475         return (0);
476 bad4:
477         crypto_unregister_all(sc->sc_cid);
478 bad3:
479         bus_teardown_intr(dev, sc->sc_irq, sc->sc_ih);
480 bad2:
481         bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq);
482 bad1:
483         bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, sc->sc_sr);
484 bad:
485         return (ENXIO);
486 }
487
488 /*
489  * Detach a device that successfully probed.
490  */
491 static int
492 ubsec_detach(device_t dev)
493 {
494         struct ubsec_softc *sc = device_get_softc(dev);
495
496         KASSERT(sc != NULL, ("ubsec_detach: null software carrier"));
497
498         /* XXX wait/abort active ops */
499
500         crit_enter();
501
502         callout_stop(&sc->sc_rngto);
503
504         crypto_unregister_all(sc->sc_cid);
505
506 #ifdef UBSEC_RNDTEST
507         if (sc->sc_rndtest)
508                 rndtest_detach(sc->sc_rndtest);
509 #endif
510
511         while (!SIMPLEQ_EMPTY(&sc->sc_freequeue)) {
512                 struct ubsec_q *q;
513
514                 q = SIMPLEQ_FIRST(&sc->sc_freequeue);
515                 SIMPLEQ_REMOVE_HEAD(&sc->sc_freequeue, q, q_next);
516                 ubsec_dma_free(sc, &q->q_dma->d_alloc);
517                 kfree(q, M_DEVBUF);
518         }
519 #ifndef UBSEC_NO_RNG
520         if (sc->sc_flags & UBS_FLAGS_RNG) {
521                 ubsec_dma_free(sc, &sc->sc_rng.rng_q.q_mcr);
522                 ubsec_dma_free(sc, &sc->sc_rng.rng_q.q_ctx);
523                 ubsec_dma_free(sc, &sc->sc_rng.rng_buf);
524         }
525 #endif /* UBSEC_NO_RNG */
526
527         bus_generic_detach(dev);
528         bus_teardown_intr(dev, sc->sc_irq, sc->sc_ih);
529         bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq);
530
531         bus_dma_tag_destroy(sc->sc_dmat);
532         bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, sc->sc_sr);
533
534         crit_exit();
535
536         return (0);
537 }
538
539 /*
540  * Stop all chip i/o so that the kernel's probe routines don't
541  * get confused by errant DMAs when rebooting.
542  */
543 static void
544 ubsec_shutdown(device_t dev)
545 {
546 #ifdef notyet
547         ubsec_stop(device_get_softc(dev));
548 #endif
549 }
550
551 /*
552  * Device suspend routine.
553  */
554 static int
555 ubsec_suspend(device_t dev)
556 {
557         struct ubsec_softc *sc = device_get_softc(dev);
558
559         KASSERT(sc != NULL, ("ubsec_suspend: null software carrier"));
560 #ifdef notyet
561         /* XXX stop the device and save PCI settings */
562 #endif
563         sc->sc_suspended = 1;
564
565         return (0);
566 }
567
568 static int
569 ubsec_resume(device_t dev)
570 {
571         struct ubsec_softc *sc = device_get_softc(dev);
572
573         KASSERT(sc != NULL, ("ubsec_resume: null software carrier"));
574 #ifdef notyet
575         /* XXX retore PCI settings and start the device */
576 #endif
577         sc->sc_suspended = 0;
578         return (0);
579 }
580
581 /*
582  * UBSEC Interrupt routine
583  */
584 static void
585 ubsec_intr(void *arg)
586 {
587         struct ubsec_softc *sc = arg;
588         volatile u_int32_t stat;
589         struct ubsec_q *q;
590         struct ubsec_dma *dmap;
591         int npkts = 0, i;
592
593         stat = READ_REG(sc, BS_STAT);
594         stat &= sc->sc_statmask;
595         if (stat == 0) {
596                 return;
597         }
598
599         WRITE_REG(sc, BS_STAT, stat);           /* IACK */
600
601         /*
602          * Check to see if we have any packets waiting for us
603          */
604         if ((stat & BS_STAT_MCR1_DONE)) {
605                 while (!SIMPLEQ_EMPTY(&sc->sc_qchip)) {
606                         q = SIMPLEQ_FIRST(&sc->sc_qchip);
607                         dmap = q->q_dma;
608
609                         if ((dmap->d_dma->d_mcr.mcr_flags & htole16(UBS_MCR_DONE)) == 0)
610                                 break;
611
612                         SIMPLEQ_REMOVE_HEAD(&sc->sc_qchip, q, q_next);
613
614                         npkts = q->q_nstacked_mcrs;
615                         sc->sc_nqchip -= 1+npkts;
616                         /*
617                          * search for further sc_qchip ubsec_q's that share
618                          * the same MCR, and complete them too, they must be
619                          * at the top.
620                          */
621                         for (i = 0; i < npkts; i++) {
622                                 if(q->q_stacked_mcr[i]) {
623                                         ubsec_callback(sc, q->q_stacked_mcr[i]);
624                                 } else {
625                                         break;
626                                 }
627                         }
628                         ubsec_callback(sc, q);
629                 }
630
631                 /*
632                  * Don't send any more packet to chip if there has been
633                  * a DMAERR.
634                  */
635                 if (!(stat & BS_STAT_DMAERR))
636                         ubsec_feed(sc);
637         }
638
639         /*
640          * Check to see if we have any key setups/rng's waiting for us
641          */
642         if ((sc->sc_flags & (UBS_FLAGS_KEY|UBS_FLAGS_RNG)) &&
643             (stat & BS_STAT_MCR2_DONE)) {
644                 struct ubsec_q2 *q2;
645                 struct ubsec_mcr *mcr;
646
647                 while (!SIMPLEQ_EMPTY(&sc->sc_qchip2)) {
648                         q2 = SIMPLEQ_FIRST(&sc->sc_qchip2);
649
650                         ubsec_dma_sync(&q2->q_mcr,
651                             BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
652
653                         mcr = (struct ubsec_mcr *)q2->q_mcr.dma_vaddr;
654                         if ((mcr->mcr_flags & htole16(UBS_MCR_DONE)) == 0) {
655                                 ubsec_dma_sync(&q2->q_mcr,
656                                     BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
657                                 break;
658                         }
659                         SIMPLEQ_REMOVE_HEAD(&sc->sc_qchip2, q2, q_next);
660                         ubsec_callback2(sc, q2);
661                         /*
662                          * Don't send any more packet to chip if there has been
663                          * a DMAERR.
664                          */
665                         if (!(stat & BS_STAT_DMAERR))
666                                 ubsec_feed2(sc);
667                 }
668         }
669
670         /*
671          * Check to see if we got any DMA Error
672          */
673         if (stat & BS_STAT_DMAERR) {
674 #ifdef UBSEC_DEBUG
675                 if (ubsec_debug) {
676                         volatile u_int32_t a = READ_REG(sc, BS_ERR);
677
678                         kprintf("dmaerr %s@%08x\n",
679                             (a & BS_ERR_READ) ? "read" : "write",
680                             a & BS_ERR_ADDR);
681                 }
682 #endif /* UBSEC_DEBUG */
683                 ubsecstats.hst_dmaerr++;
684                 ubsec_totalreset(sc);
685                 ubsec_feed(sc);
686         }
687
688         if (sc->sc_needwakeup) {                /* XXX check high watermark */
689                 int wakeup = sc->sc_needwakeup & (CRYPTO_SYMQ|CRYPTO_ASYMQ);
690 #ifdef UBSEC_DEBUG
691                 if (ubsec_debug)
692                         device_printf(sc->sc_dev, "wakeup crypto (%x)\n",
693                                 sc->sc_needwakeup);
694 #endif /* UBSEC_DEBUG */
695                 sc->sc_needwakeup &= ~wakeup;
696                 crypto_unblock(sc->sc_cid, wakeup);
697         }
698 }
699
700 /*
701  * ubsec_feed() - aggregate and post requests to chip
702  */
703 static void
704 ubsec_feed(struct ubsec_softc *sc)
705 {
706         struct ubsec_q *q, *q2;
707         int npkts, i;
708         void *v;
709         u_int32_t stat;
710
711         /*
712          * Decide how many ops to combine in a single MCR.  We cannot
713          * aggregate more than UBS_MAX_AGGR because this is the number
714          * of slots defined in the data structure.  Note that
715          * aggregation only happens if ops are marked batch'able.
716          * Aggregating ops reduces the number of interrupts to the host
717          * but also (potentially) increases the latency for processing
718          * completed ops as we only get an interrupt when all aggregated
719          * ops have completed.
720          */
721         if (sc->sc_nqueue == 0)
722                 return;
723         if (sc->sc_nqueue > 1) {
724                 npkts = 0;
725                 SIMPLEQ_FOREACH(q, &sc->sc_queue, q_next) {
726                         npkts++;
727                         if ((q->q_crp->crp_flags & CRYPTO_F_BATCH) == 0)
728                                 break;
729                 }
730         } else
731                 npkts = 1;
732         /*
733          * Check device status before going any further.
734          */
735         if ((stat = READ_REG(sc, BS_STAT)) & (BS_STAT_MCR1_FULL | BS_STAT_DMAERR)) {
736                 if (stat & BS_STAT_DMAERR) {
737                         ubsec_totalreset(sc);
738                         ubsecstats.hst_dmaerr++;
739                 } else
740                         ubsecstats.hst_mcr1full++;
741                 return;
742         }
743         if (sc->sc_nqueue > ubsecstats.hst_maxqueue)
744                 ubsecstats.hst_maxqueue = sc->sc_nqueue;
745         if (npkts > UBS_MAX_AGGR)
746                 npkts = UBS_MAX_AGGR;
747         if (npkts < 2)                          /* special case 1 op */
748                 goto feed1;
749
750         ubsecstats.hst_totbatch += npkts-1;
751 #ifdef UBSEC_DEBUG
752         if (ubsec_debug)
753                 kprintf("merging %d records\n", npkts);
754 #endif /* UBSEC_DEBUG */
755
756         q = SIMPLEQ_FIRST(&sc->sc_queue);
757         SIMPLEQ_REMOVE_HEAD(&sc->sc_queue, q, q_next);
758         --sc->sc_nqueue;
759
760         bus_dmamap_sync(sc->sc_dmat, q->q_src_map, BUS_DMASYNC_PREWRITE);
761         if (q->q_dst_map != NULL)
762                 bus_dmamap_sync(sc->sc_dmat, q->q_dst_map, BUS_DMASYNC_PREREAD);
763
764         q->q_nstacked_mcrs = npkts - 1;         /* Number of packets stacked */
765
766         for (i = 0; i < q->q_nstacked_mcrs; i++) {
767                 q2 = SIMPLEQ_FIRST(&sc->sc_queue);
768                 bus_dmamap_sync(sc->sc_dmat, q2->q_src_map,
769                     BUS_DMASYNC_PREWRITE);
770                 if (q2->q_dst_map != NULL)
771                         bus_dmamap_sync(sc->sc_dmat, q2->q_dst_map,
772                             BUS_DMASYNC_PREREAD);
773                 SIMPLEQ_REMOVE_HEAD(&sc->sc_queue, q2, q_next);
774                 --sc->sc_nqueue;
775
776                 v = (void*)(((char *)&q2->q_dma->d_dma->d_mcr) + sizeof(struct ubsec_mcr) -
777                     sizeof(struct ubsec_mcr_add));
778                 bcopy(v, &q->q_dma->d_dma->d_mcradd[i], sizeof(struct ubsec_mcr_add));
779                 q->q_stacked_mcr[i] = q2;
780         }
781         q->q_dma->d_dma->d_mcr.mcr_pkts = htole16(npkts);
782         SIMPLEQ_INSERT_TAIL(&sc->sc_qchip, q, q_next);
783         sc->sc_nqchip += npkts;
784         if (sc->sc_nqchip > ubsecstats.hst_maxqchip)
785                 ubsecstats.hst_maxqchip = sc->sc_nqchip;
786         ubsec_dma_sync(&q->q_dma->d_alloc,
787             BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
788         WRITE_REG(sc, BS_MCR1, q->q_dma->d_alloc.dma_paddr +
789             offsetof(struct ubsec_dmachunk, d_mcr));
790         return;
791
792 feed1:
793         q = SIMPLEQ_FIRST(&sc->sc_queue);
794
795         bus_dmamap_sync(sc->sc_dmat, q->q_src_map, BUS_DMASYNC_PREWRITE);
796         if (q->q_dst_map != NULL)
797                 bus_dmamap_sync(sc->sc_dmat, q->q_dst_map, BUS_DMASYNC_PREREAD);
798         ubsec_dma_sync(&q->q_dma->d_alloc,
799             BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
800
801         WRITE_REG(sc, BS_MCR1, q->q_dma->d_alloc.dma_paddr +
802             offsetof(struct ubsec_dmachunk, d_mcr));
803 #ifdef UBSEC_DEBUG
804         if (ubsec_debug)
805                 kprintf("feed1: q->chip %p %08x stat %08x\n",
806                       q, (u_int32_t)vtophys(&q->q_dma->d_dma->d_mcr),
807                       stat);
808 #endif /* UBSEC_DEBUG */
809         SIMPLEQ_REMOVE_HEAD(&sc->sc_queue, q, q_next);
810         --sc->sc_nqueue;
811         SIMPLEQ_INSERT_TAIL(&sc->sc_qchip, q, q_next);
812         sc->sc_nqchip++;
813         if (sc->sc_nqchip > ubsecstats.hst_maxqchip)
814                 ubsecstats.hst_maxqchip = sc->sc_nqchip;
815         return;
816 }
817
818 /*
819  * Allocate a new 'session' and return an encoded session id.  'sidp'
820  * contains our registration id, and should contain an encoded session
821  * id on successful allocation.
822  */
823 static int
824 ubsec_newsession(void *arg, u_int32_t *sidp, struct cryptoini *cri)
825 {
826         struct cryptoini *c, *encini = NULL, *macini = NULL;
827         struct ubsec_softc *sc = arg;
828         struct ubsec_session *ses = NULL;
829         MD5_CTX md5ctx;
830         SHA1_CTX sha1ctx;
831         int i, sesn;
832
833         KASSERT(sc != NULL, ("ubsec_newsession: null softc"));
834         if (sidp == NULL || cri == NULL || sc == NULL)
835                 return (EINVAL);
836
837         for (c = cri; c != NULL; c = c->cri_next) {
838                 if (c->cri_alg == CRYPTO_MD5_HMAC ||
839                     c->cri_alg == CRYPTO_SHA1_HMAC) {
840                         if (macini)
841                                 return (EINVAL);
842                         macini = c;
843                 } else if (c->cri_alg == CRYPTO_DES_CBC ||
844                     c->cri_alg == CRYPTO_3DES_CBC) {
845                         if (encini)
846                                 return (EINVAL);
847                         encini = c;
848                 } else
849                         return (EINVAL);
850         }
851         if (encini == NULL && macini == NULL)
852                 return (EINVAL);
853
854         if (sc->sc_sessions == NULL) {
855                 ses = sc->sc_sessions = kmalloc(sizeof(struct ubsec_session),
856                                                 M_DEVBUF, M_INTWAIT);
857                 sesn = 0;
858                 sc->sc_nsessions = 1;
859         } else {
860                 for (sesn = 0; sesn < sc->sc_nsessions; sesn++) {
861                         if (sc->sc_sessions[sesn].ses_used == 0) {
862                                 ses = &sc->sc_sessions[sesn];
863                                 break;
864                         }
865                 }
866
867                 if (ses == NULL) {
868                         sesn = sc->sc_nsessions;
869                         ses = kmalloc((sesn + 1) * sizeof(struct ubsec_session),
870                                         M_DEVBUF, M_INTWAIT);
871                         bcopy(sc->sc_sessions, ses, sesn *
872                             sizeof(struct ubsec_session));
873                         bzero(sc->sc_sessions, sesn *
874                             sizeof(struct ubsec_session));
875                         kfree(sc->sc_sessions, M_DEVBUF);
876                         sc->sc_sessions = ses;
877                         ses = &sc->sc_sessions[sesn];
878                         sc->sc_nsessions++;
879                 }
880         }
881
882         bzero(ses, sizeof(struct ubsec_session));
883         ses->ses_used = 1;
884         if (encini) {
885                 /* get an IV, network byte order */
886                 /* XXX may read fewer than requested */
887                 read_random(ses->ses_iv, sizeof(ses->ses_iv));
888
889                 /* Go ahead and compute key in ubsec's byte order */
890                 if (encini->cri_alg == CRYPTO_DES_CBC) {
891                         bcopy(encini->cri_key, &ses->ses_deskey[0], 8);
892                         bcopy(encini->cri_key, &ses->ses_deskey[2], 8);
893                         bcopy(encini->cri_key, &ses->ses_deskey[4], 8);
894                 } else
895                         bcopy(encini->cri_key, ses->ses_deskey, 24);
896
897                 SWAP32(ses->ses_deskey[0]);
898                 SWAP32(ses->ses_deskey[1]);
899                 SWAP32(ses->ses_deskey[2]);
900                 SWAP32(ses->ses_deskey[3]);
901                 SWAP32(ses->ses_deskey[4]);
902                 SWAP32(ses->ses_deskey[5]);
903         }
904
905         if (macini) {
906                 for (i = 0; i < macini->cri_klen / 8; i++)
907                         macini->cri_key[i] ^= HMAC_IPAD_VAL;
908
909                 if (macini->cri_alg == CRYPTO_MD5_HMAC) {
910                         MD5Init(&md5ctx);
911                         MD5Update(&md5ctx, macini->cri_key,
912                             macini->cri_klen / 8);
913                         MD5Update(&md5ctx, hmac_ipad_buffer,
914                             HMAC_BLOCK_LEN - (macini->cri_klen / 8));
915                         bcopy(md5ctx.state, ses->ses_hminner,
916                             sizeof(md5ctx.state));
917                 } else {
918                         SHA1Init(&sha1ctx);
919                         SHA1Update(&sha1ctx, macini->cri_key,
920                             macini->cri_klen / 8);
921                         SHA1Update(&sha1ctx, hmac_ipad_buffer,
922                             HMAC_BLOCK_LEN - (macini->cri_klen / 8));
923                         bcopy(sha1ctx.h.b32, ses->ses_hminner,
924                             sizeof(sha1ctx.h.b32));
925                 }
926
927                 for (i = 0; i < macini->cri_klen / 8; i++)
928                         macini->cri_key[i] ^= (HMAC_IPAD_VAL ^ HMAC_OPAD_VAL);
929
930                 if (macini->cri_alg == CRYPTO_MD5_HMAC) {
931                         MD5Init(&md5ctx);
932                         MD5Update(&md5ctx, macini->cri_key,
933                             macini->cri_klen / 8);
934                         MD5Update(&md5ctx, hmac_opad_buffer,
935                             HMAC_BLOCK_LEN - (macini->cri_klen / 8));
936                         bcopy(md5ctx.state, ses->ses_hmouter,
937                             sizeof(md5ctx.state));
938                 } else {
939                         SHA1Init(&sha1ctx);
940                         SHA1Update(&sha1ctx, macini->cri_key,
941                             macini->cri_klen / 8);
942                         SHA1Update(&sha1ctx, hmac_opad_buffer,
943                             HMAC_BLOCK_LEN - (macini->cri_klen / 8));
944                         bcopy(sha1ctx.h.b32, ses->ses_hmouter,
945                             sizeof(sha1ctx.h.b32));
946                 }
947
948                 for (i = 0; i < macini->cri_klen / 8; i++)
949                         macini->cri_key[i] ^= HMAC_OPAD_VAL;
950         }
951
952         *sidp = UBSEC_SID(device_get_unit(sc->sc_dev), sesn);
953         return (0);
954 }
955
956 /*
957  * Deallocate a session.
958  */
959 static int
960 ubsec_freesession(void *arg, u_int64_t tid)
961 {
962         struct ubsec_softc *sc = arg;
963         int session;
964         u_int32_t sid = ((u_int32_t) tid) & 0xffffffff;
965
966         KASSERT(sc != NULL, ("ubsec_freesession: null softc"));
967         if (sc == NULL)
968                 return (EINVAL);
969
970         session = UBSEC_SESSION(sid);
971         if (session >= sc->sc_nsessions)
972                 return (EINVAL);
973
974         bzero(&sc->sc_sessions[session], sizeof(sc->sc_sessions[session]));
975         return (0);
976 }
977
978 static void
979 ubsec_op_cb(void *arg, bus_dma_segment_t *seg, int nsegs, bus_size_t mapsize, int error)
980 {
981         struct ubsec_operand *op = arg;
982
983         KASSERT(nsegs <= UBS_MAX_SCATTER,
984                 ("Too many DMA segments returned when mapping operand"));
985 #ifdef UBSEC_DEBUG
986         if (ubsec_debug)
987                 kprintf("ubsec_op_cb: mapsize %u nsegs %d\n",
988                         (u_int) mapsize, nsegs);
989 #endif
990         op->mapsize = mapsize;
991         op->nsegs = nsegs;
992         bcopy(seg, op->segs, nsegs * sizeof (seg[0]));
993 }
994
995 static int
996 ubsec_process(void *arg, struct cryptop *crp, int hint)
997 {
998         struct ubsec_q *q = NULL;
999         int err = 0, i, j, nicealign;
1000         struct ubsec_softc *sc = arg;
1001         struct cryptodesc *crd1, *crd2, *maccrd, *enccrd;
1002         int encoffset = 0, macoffset = 0, cpskip, cpoffset;
1003         int sskip, dskip, stheend, dtheend;
1004         int16_t coffset;
1005         struct ubsec_session *ses;
1006         struct ubsec_pktctx ctx;
1007         struct ubsec_dma *dmap = NULL;
1008
1009         if (crp == NULL || crp->crp_callback == NULL || sc == NULL) {
1010                 ubsecstats.hst_invalid++;
1011                 return (EINVAL);
1012         }
1013         if (UBSEC_SESSION(crp->crp_sid) >= sc->sc_nsessions) {
1014                 ubsecstats.hst_badsession++;
1015                 return (EINVAL);
1016         }
1017
1018         crit_enter();
1019
1020         if (SIMPLEQ_EMPTY(&sc->sc_freequeue)) {
1021                 ubsecstats.hst_queuefull++;
1022                 sc->sc_needwakeup |= CRYPTO_SYMQ;
1023                 crit_exit();
1024                 return (ERESTART);
1025         }
1026         q = SIMPLEQ_FIRST(&sc->sc_freequeue);
1027         SIMPLEQ_REMOVE_HEAD(&sc->sc_freequeue, q, q_next);
1028         crit_exit();
1029
1030         dmap = q->q_dma; /* Save dma pointer */
1031         bzero(q, sizeof(struct ubsec_q));
1032         bzero(&ctx, sizeof(ctx));
1033
1034         q->q_sesn = UBSEC_SESSION(crp->crp_sid);
1035         q->q_dma = dmap;
1036         ses = &sc->sc_sessions[q->q_sesn];
1037
1038         if (crp->crp_flags & CRYPTO_F_IMBUF) {
1039                 q->q_src_m = (struct mbuf *)crp->crp_buf;
1040                 q->q_dst_m = (struct mbuf *)crp->crp_buf;
1041         } else if (crp->crp_flags & CRYPTO_F_IOV) {
1042                 q->q_src_io = (struct uio *)crp->crp_buf;
1043                 q->q_dst_io = (struct uio *)crp->crp_buf;
1044         } else {
1045                 ubsecstats.hst_badflags++;
1046                 err = EINVAL;
1047                 goto errout;    /* XXX we don't handle contiguous blocks! */
1048         }
1049
1050         bzero(&dmap->d_dma->d_mcr, sizeof(struct ubsec_mcr));
1051
1052         dmap->d_dma->d_mcr.mcr_pkts = htole16(1);
1053         dmap->d_dma->d_mcr.mcr_flags = 0;
1054         q->q_crp = crp;
1055
1056         crd1 = crp->crp_desc;
1057         if (crd1 == NULL) {
1058                 ubsecstats.hst_nodesc++;
1059                 err = EINVAL;
1060                 goto errout;
1061         }
1062         crd2 = crd1->crd_next;
1063
1064         if (crd2 == NULL) {
1065                 if (crd1->crd_alg == CRYPTO_MD5_HMAC ||
1066                     crd1->crd_alg == CRYPTO_SHA1_HMAC) {
1067                         maccrd = crd1;
1068                         enccrd = NULL;
1069                 } else if (crd1->crd_alg == CRYPTO_DES_CBC ||
1070                     crd1->crd_alg == CRYPTO_3DES_CBC) {
1071                         maccrd = NULL;
1072                         enccrd = crd1;
1073                 } else {
1074                         ubsecstats.hst_badalg++;
1075                         err = EINVAL;
1076                         goto errout;
1077                 }
1078         } else {
1079                 if ((crd1->crd_alg == CRYPTO_MD5_HMAC ||
1080                     crd1->crd_alg == CRYPTO_SHA1_HMAC) &&
1081                     (crd2->crd_alg == CRYPTO_DES_CBC ||
1082                         crd2->crd_alg == CRYPTO_3DES_CBC) &&
1083                     ((crd2->crd_flags & CRD_F_ENCRYPT) == 0)) {
1084                         maccrd = crd1;
1085                         enccrd = crd2;
1086                 } else if ((crd1->crd_alg == CRYPTO_DES_CBC ||
1087                     crd1->crd_alg == CRYPTO_3DES_CBC) &&
1088                     (crd2->crd_alg == CRYPTO_MD5_HMAC ||
1089                         crd2->crd_alg == CRYPTO_SHA1_HMAC) &&
1090                     (crd1->crd_flags & CRD_F_ENCRYPT)) {
1091                         enccrd = crd1;
1092                         maccrd = crd2;
1093                 } else {
1094                         /*
1095                          * We cannot order the ubsec as requested
1096                          */
1097                         ubsecstats.hst_badalg++;
1098                         err = EINVAL;
1099                         goto errout;
1100                 }
1101         }
1102
1103         if (enccrd) {
1104                 encoffset = enccrd->crd_skip;
1105                 ctx.pc_flags |= htole16(UBS_PKTCTX_ENC_3DES);
1106
1107                 if (enccrd->crd_flags & CRD_F_ENCRYPT) {
1108                         q->q_flags |= UBSEC_QFLAGS_COPYOUTIV;
1109
1110                         if (enccrd->crd_flags & CRD_F_IV_EXPLICIT)
1111                                 bcopy(enccrd->crd_iv, ctx.pc_iv, 8);
1112                         else {
1113                                 ctx.pc_iv[0] = ses->ses_iv[0];
1114                                 ctx.pc_iv[1] = ses->ses_iv[1];
1115                         }
1116
1117                         if ((enccrd->crd_flags & CRD_F_IV_PRESENT) == 0) {
1118                                 if (crp->crp_flags & CRYPTO_F_IMBUF)
1119                                         m_copyback(q->q_src_m,
1120                                             enccrd->crd_inject,
1121                                             8, (caddr_t)ctx.pc_iv);
1122                                 else if (crp->crp_flags & CRYPTO_F_IOV)
1123                                         cuio_copyback(q->q_src_io,
1124                                             enccrd->crd_inject,
1125                                             8, (caddr_t)ctx.pc_iv);
1126                         }
1127                 } else {
1128                         ctx.pc_flags |= htole16(UBS_PKTCTX_INBOUND);
1129
1130                         if (enccrd->crd_flags & CRD_F_IV_EXPLICIT)
1131                                 bcopy(enccrd->crd_iv, ctx.pc_iv, 8);
1132                         else if (crp->crp_flags & CRYPTO_F_IMBUF)
1133                                 m_copydata(q->q_src_m, enccrd->crd_inject,
1134                                     8, (caddr_t)ctx.pc_iv);
1135                         else if (crp->crp_flags & CRYPTO_F_IOV)
1136                                 cuio_copydata(q->q_src_io,
1137                                     enccrd->crd_inject, 8,
1138                                     (caddr_t)ctx.pc_iv);
1139                 }
1140
1141                 ctx.pc_deskey[0] = ses->ses_deskey[0];
1142                 ctx.pc_deskey[1] = ses->ses_deskey[1];
1143                 ctx.pc_deskey[2] = ses->ses_deskey[2];
1144                 ctx.pc_deskey[3] = ses->ses_deskey[3];
1145                 ctx.pc_deskey[4] = ses->ses_deskey[4];
1146                 ctx.pc_deskey[5] = ses->ses_deskey[5];
1147                 SWAP32(ctx.pc_iv[0]);
1148                 SWAP32(ctx.pc_iv[1]);
1149         }
1150
1151         if (maccrd) {
1152                 macoffset = maccrd->crd_skip;
1153
1154                 if (maccrd->crd_alg == CRYPTO_MD5_HMAC)
1155                         ctx.pc_flags |= htole16(UBS_PKTCTX_AUTH_MD5);
1156                 else
1157                         ctx.pc_flags |= htole16(UBS_PKTCTX_AUTH_SHA1);
1158
1159                 for (i = 0; i < 5; i++) {
1160                         ctx.pc_hminner[i] = ses->ses_hminner[i];
1161                         ctx.pc_hmouter[i] = ses->ses_hmouter[i];
1162
1163                         HTOLE32(ctx.pc_hminner[i]);
1164                         HTOLE32(ctx.pc_hmouter[i]);
1165                 }
1166         }
1167
1168         if (enccrd && maccrd) {
1169                 /*
1170                  * ubsec cannot handle packets where the end of encryption
1171                  * and authentication are not the same, or where the
1172                  * encrypted part begins before the authenticated part.
1173                  */
1174                 if ((encoffset + enccrd->crd_len) !=
1175                     (macoffset + maccrd->crd_len)) {
1176                         ubsecstats.hst_lenmismatch++;
1177                         err = EINVAL;
1178                         goto errout;
1179                 }
1180                 if (enccrd->crd_skip < maccrd->crd_skip) {
1181                         ubsecstats.hst_skipmismatch++;
1182                         err = EINVAL;
1183                         goto errout;
1184                 }
1185                 sskip = maccrd->crd_skip;
1186                 cpskip = dskip = enccrd->crd_skip;
1187                 stheend = maccrd->crd_len;
1188                 dtheend = enccrd->crd_len;
1189                 coffset = enccrd->crd_skip - maccrd->crd_skip;
1190                 cpoffset = cpskip + dtheend;
1191 #ifdef UBSEC_DEBUG
1192                 if (ubsec_debug) {
1193                         kprintf("mac: skip %d, len %d, inject %d\n",
1194                             maccrd->crd_skip, maccrd->crd_len, maccrd->crd_inject);
1195                         kprintf("enc: skip %d, len %d, inject %d\n",
1196                             enccrd->crd_skip, enccrd->crd_len, enccrd->crd_inject);
1197                         kprintf("src: skip %d, len %d\n", sskip, stheend);
1198                         kprintf("dst: skip %d, len %d\n", dskip, dtheend);
1199                         kprintf("ubs: coffset %d, pktlen %d, cpskip %d, cpoffset %d\n",
1200                             coffset, stheend, cpskip, cpoffset);
1201                 }
1202 #endif
1203         } else {
1204                 cpskip = dskip = sskip = macoffset + encoffset;
1205                 dtheend = stheend = (enccrd)?enccrd->crd_len:maccrd->crd_len;
1206                 cpoffset = cpskip + dtheend;
1207                 coffset = 0;
1208         }
1209         ctx.pc_offset = htole16(coffset >> 2);
1210
1211         if (bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT, &q->q_src_map)) {
1212                 ubsecstats.hst_nomap++;
1213                 err = ENOMEM;
1214                 goto errout;
1215         }
1216         if (crp->crp_flags & CRYPTO_F_IMBUF) {
1217                 if (bus_dmamap_load_mbuf(sc->sc_dmat, q->q_src_map,
1218                     q->q_src_m, ubsec_op_cb, &q->q_src, BUS_DMA_NOWAIT) != 0) {
1219                         bus_dmamap_destroy(sc->sc_dmat, q->q_src_map);
1220                         q->q_src_map = NULL;
1221                         ubsecstats.hst_noload++;
1222                         err = ENOMEM;
1223                         goto errout;
1224                 }
1225         } else if (crp->crp_flags & CRYPTO_F_IOV) {
1226                 if (bus_dmamap_load_uio(sc->sc_dmat, q->q_src_map,
1227                     q->q_src_io, ubsec_op_cb, &q->q_src, BUS_DMA_NOWAIT) != 0) {
1228                         bus_dmamap_destroy(sc->sc_dmat, q->q_src_map);
1229                         q->q_src_map = NULL;
1230                         ubsecstats.hst_noload++;
1231                         err = ENOMEM;
1232                         goto errout;
1233                 }
1234         }
1235         nicealign = ubsec_dmamap_aligned(&q->q_src);
1236
1237         dmap->d_dma->d_mcr.mcr_pktlen = htole16(stheend);
1238
1239 #ifdef UBSEC_DEBUG
1240         if (ubsec_debug)
1241                 kprintf("src skip: %d nicealign: %u\n", sskip, nicealign);
1242 #endif
1243         for (i = j = 0; i < q->q_src_nsegs; i++) {
1244                 struct ubsec_pktbuf *pb;
1245                 bus_size_t packl = q->q_src_segs[i].ds_len;
1246                 bus_addr_t packp = q->q_src_segs[i].ds_addr;
1247
1248                 if (sskip >= packl) {
1249                         sskip -= packl;
1250                         continue;
1251                 }
1252
1253                 packl -= sskip;
1254                 packp += sskip;
1255                 sskip = 0;
1256
1257                 if (packl > 0xfffc) {
1258                         err = EIO;
1259                         goto errout;
1260                 }
1261
1262                 if (j == 0)
1263                         pb = &dmap->d_dma->d_mcr.mcr_ipktbuf;
1264                 else
1265                         pb = &dmap->d_dma->d_sbuf[j - 1];
1266
1267                 pb->pb_addr = htole32(packp);
1268
1269                 if (stheend) {
1270                         if (packl > stheend) {
1271                                 pb->pb_len = htole32(stheend);
1272                                 stheend = 0;
1273                         } else {
1274                                 pb->pb_len = htole32(packl);
1275                                 stheend -= packl;
1276                         }
1277                 } else
1278                         pb->pb_len = htole32(packl);
1279
1280                 if ((i + 1) == q->q_src_nsegs)
1281                         pb->pb_next = 0;
1282                 else
1283                         pb->pb_next = htole32(dmap->d_alloc.dma_paddr +
1284                             offsetof(struct ubsec_dmachunk, d_sbuf[j]));
1285                 j++;
1286         }
1287
1288         if (enccrd == NULL && maccrd != NULL) {
1289                 dmap->d_dma->d_mcr.mcr_opktbuf.pb_addr = 0;
1290                 dmap->d_dma->d_mcr.mcr_opktbuf.pb_len = 0;
1291                 dmap->d_dma->d_mcr.mcr_opktbuf.pb_next = htole32(dmap->d_alloc.dma_paddr +
1292                     offsetof(struct ubsec_dmachunk, d_macbuf[0]));
1293 #ifdef UBSEC_DEBUG
1294                 if (ubsec_debug)
1295                         kprintf("opkt: %x %x %x\n",
1296                             dmap->d_dma->d_mcr.mcr_opktbuf.pb_addr,
1297                             dmap->d_dma->d_mcr.mcr_opktbuf.pb_len,
1298                             dmap->d_dma->d_mcr.mcr_opktbuf.pb_next);
1299 #endif
1300         } else {
1301                 if (crp->crp_flags & CRYPTO_F_IOV) {
1302                         if (!nicealign) {
1303                                 ubsecstats.hst_iovmisaligned++;
1304                                 err = EINVAL;
1305                                 goto errout;
1306                         }
1307                         if (bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT,
1308                              &q->q_dst_map)) {
1309                                 ubsecstats.hst_nomap++;
1310                                 err = ENOMEM;
1311                                 goto errout;
1312                         }
1313                         if (bus_dmamap_load_uio(sc->sc_dmat, q->q_dst_map,
1314                             q->q_dst_io, ubsec_op_cb, &q->q_dst, BUS_DMA_NOWAIT) != 0) {
1315                                 bus_dmamap_destroy(sc->sc_dmat, q->q_dst_map);
1316                                 q->q_dst_map = NULL;
1317                                 ubsecstats.hst_noload++;
1318                                 err = ENOMEM;
1319                                 goto errout;
1320                         }
1321                 } else if (crp->crp_flags & CRYPTO_F_IMBUF) {
1322                         if (nicealign) {
1323                                 q->q_dst = q->q_src;
1324                         } else {
1325                                 int totlen, len;
1326                                 struct mbuf *m, *top, **mp;
1327
1328                                 ubsecstats.hst_unaligned++;
1329                                 totlen = q->q_src_mapsize;
1330                                 if (q->q_src_m->m_flags & M_PKTHDR) {
1331                                         len = MHLEN;
1332                                         MGETHDR(m, MB_DONTWAIT, MT_DATA);
1333                                         if (m && !m_dup_pkthdr(m, q->q_src_m, MB_DONTWAIT)) {
1334                                                 m_free(m);
1335                                                 m = NULL;
1336                                         }
1337                                 } else {
1338                                         len = MLEN;
1339                                         MGET(m, MB_DONTWAIT, MT_DATA);
1340                                 }
1341                                 if (m == NULL) {
1342                                         ubsecstats.hst_nombuf++;
1343                                         err = sc->sc_nqueue ? ERESTART : ENOMEM;
1344                                         goto errout;
1345                                 }
1346                                 if (totlen >= MINCLSIZE) {
1347                                         MCLGET(m, MB_DONTWAIT);
1348                                         if ((m->m_flags & M_EXT) == 0) {
1349                                                 m_free(m);
1350                                                 ubsecstats.hst_nomcl++;
1351                                                 err = sc->sc_nqueue ? ERESTART : ENOMEM;
1352                                                 goto errout;
1353                                         }
1354                                         len = MCLBYTES;
1355                                 }
1356                                 m->m_len = len;
1357                                 top = NULL;
1358                                 mp = &top;
1359
1360                                 while (totlen > 0) {
1361                                         if (top) {
1362                                                 MGET(m, MB_DONTWAIT, MT_DATA);
1363                                                 if (m == NULL) {
1364                                                         m_freem(top);
1365                                                         ubsecstats.hst_nombuf++;
1366                                                         err = sc->sc_nqueue ? ERESTART : ENOMEM;
1367                                                         goto errout;
1368                                                 }
1369                                                 len = MLEN;
1370                                         }
1371                                         if (top && totlen >= MINCLSIZE) {
1372                                                 MCLGET(m, MB_DONTWAIT);
1373                                                 if ((m->m_flags & M_EXT) == 0) {
1374                                                         *mp = m;
1375                                                         m_freem(top);
1376                                                         ubsecstats.hst_nomcl++;
1377                                                         err = sc->sc_nqueue ? ERESTART : ENOMEM;
1378                                                         goto errout;
1379                                                 }
1380                                                 len = MCLBYTES;
1381                                         }
1382                                         m->m_len = len = min(totlen, len);
1383                                         totlen -= len;
1384                                         *mp = m;
1385                                         mp = &m->m_next;
1386                                 }
1387                                 q->q_dst_m = top;
1388                                 ubsec_mcopy(q->q_src_m, q->q_dst_m,
1389                                     cpskip, cpoffset);
1390                                 if (bus_dmamap_create(sc->sc_dmat, 
1391                                     BUS_DMA_NOWAIT, &q->q_dst_map) != 0) {
1392                                         ubsecstats.hst_nomap++;
1393                                         err = ENOMEM;
1394                                         goto errout;
1395                                 }
1396                                 if (bus_dmamap_load_mbuf(sc->sc_dmat,
1397                                     q->q_dst_map, q->q_dst_m,
1398                                     ubsec_op_cb, &q->q_dst,
1399                                     BUS_DMA_NOWAIT) != 0) {
1400                                         bus_dmamap_destroy(sc->sc_dmat,
1401                                         q->q_dst_map);
1402                                         q->q_dst_map = NULL;
1403                                         ubsecstats.hst_noload++;
1404                                         err = ENOMEM;
1405                                         goto errout;
1406                                 }
1407                         }
1408                 } else {
1409                         ubsecstats.hst_badflags++;
1410                         err = EINVAL;
1411                         goto errout;
1412                 }
1413
1414 #ifdef UBSEC_DEBUG
1415                 if (ubsec_debug)
1416                         kprintf("dst skip: %d\n", dskip);
1417 #endif
1418                 for (i = j = 0; i < q->q_dst_nsegs; i++) {
1419                         struct ubsec_pktbuf *pb;
1420                         bus_size_t packl = q->q_dst_segs[i].ds_len;
1421                         bus_addr_t packp = q->q_dst_segs[i].ds_addr;
1422
1423                         if (dskip >= packl) {
1424                                 dskip -= packl;
1425                                 continue;
1426                         }
1427
1428                         packl -= dskip;
1429                         packp += dskip;
1430                         dskip = 0;
1431
1432                         if (packl > 0xfffc) {
1433                                 err = EIO;
1434                                 goto errout;
1435                         }
1436
1437                         if (j == 0)
1438                                 pb = &dmap->d_dma->d_mcr.mcr_opktbuf;
1439                         else
1440                                 pb = &dmap->d_dma->d_dbuf[j - 1];
1441
1442                         pb->pb_addr = htole32(packp);
1443
1444                         if (dtheend) {
1445                                 if (packl > dtheend) {
1446                                         pb->pb_len = htole32(dtheend);
1447                                         dtheend = 0;
1448                                 } else {
1449                                         pb->pb_len = htole32(packl);
1450                                         dtheend -= packl;
1451                                 }
1452                         } else
1453                                 pb->pb_len = htole32(packl);
1454
1455                         if ((i + 1) == q->q_dst_nsegs) {
1456                                 if (maccrd)
1457                                         pb->pb_next = htole32(dmap->d_alloc.dma_paddr +
1458                                             offsetof(struct ubsec_dmachunk, d_macbuf[0]));
1459                                 else
1460                                         pb->pb_next = 0;
1461                         } else
1462                                 pb->pb_next = htole32(dmap->d_alloc.dma_paddr +
1463                                     offsetof(struct ubsec_dmachunk, d_dbuf[j]));
1464                         j++;
1465                 }
1466         }
1467
1468         dmap->d_dma->d_mcr.mcr_cmdctxp = htole32(dmap->d_alloc.dma_paddr +
1469             offsetof(struct ubsec_dmachunk, d_ctx));
1470
1471         if (sc->sc_flags & UBS_FLAGS_LONGCTX) {
1472                 struct ubsec_pktctx_long *ctxl;
1473
1474                 ctxl = (struct ubsec_pktctx_long *)(dmap->d_alloc.dma_vaddr +
1475                     offsetof(struct ubsec_dmachunk, d_ctx));
1476                 
1477                 /* transform small context into long context */
1478                 ctxl->pc_len = htole16(sizeof(struct ubsec_pktctx_long));
1479                 ctxl->pc_type = htole16(UBS_PKTCTX_TYPE_IPSEC);
1480                 ctxl->pc_flags = ctx.pc_flags;
1481                 ctxl->pc_offset = ctx.pc_offset;
1482                 for (i = 0; i < 6; i++)
1483                         ctxl->pc_deskey[i] = ctx.pc_deskey[i];
1484                 for (i = 0; i < 5; i++)
1485                         ctxl->pc_hminner[i] = ctx.pc_hminner[i];
1486                 for (i = 0; i < 5; i++)
1487                         ctxl->pc_hmouter[i] = ctx.pc_hmouter[i];   
1488                 ctxl->pc_iv[0] = ctx.pc_iv[0];
1489                 ctxl->pc_iv[1] = ctx.pc_iv[1];
1490         } else
1491                 bcopy(&ctx, dmap->d_alloc.dma_vaddr +
1492                     offsetof(struct ubsec_dmachunk, d_ctx),
1493                     sizeof(struct ubsec_pktctx));
1494
1495         crit_enter();
1496         SIMPLEQ_INSERT_TAIL(&sc->sc_queue, q, q_next);
1497         sc->sc_nqueue++;
1498         ubsecstats.hst_ipackets++;
1499         ubsecstats.hst_ibytes += dmap->d_alloc.dma_size;
1500         if ((hint & CRYPTO_HINT_MORE) == 0 || sc->sc_nqueue >= UBS_MAX_AGGR)
1501                 ubsec_feed(sc);
1502         crit_exit();
1503         return (0);
1504
1505 errout:
1506         if (q != NULL) {
1507                 if ((q->q_dst_m != NULL) && (q->q_src_m != q->q_dst_m))
1508                         m_freem(q->q_dst_m);
1509
1510                 if (q->q_dst_map != NULL && q->q_dst_map != q->q_src_map) {
1511                         bus_dmamap_unload(sc->sc_dmat, q->q_dst_map);
1512                         bus_dmamap_destroy(sc->sc_dmat, q->q_dst_map);
1513                 }
1514                 if (q->q_src_map != NULL) {
1515                         bus_dmamap_unload(sc->sc_dmat, q->q_src_map);
1516                         bus_dmamap_destroy(sc->sc_dmat, q->q_src_map);
1517                 }
1518
1519                 crit_enter();
1520                 SIMPLEQ_INSERT_TAIL(&sc->sc_freequeue, q, q_next);
1521                 crit_exit();
1522         }
1523         if (err != ERESTART) {
1524                 crp->crp_etype = err;
1525                 crypto_done(crp);
1526         } else {
1527                 sc->sc_needwakeup |= CRYPTO_SYMQ;
1528         }
1529         return (err);
1530 }
1531
1532 static void
1533 ubsec_callback(struct ubsec_softc *sc, struct ubsec_q *q)
1534 {
1535         struct cryptop *crp = (struct cryptop *)q->q_crp;
1536         struct cryptodesc *crd;
1537         struct ubsec_dma *dmap = q->q_dma;
1538
1539         ubsecstats.hst_opackets++;
1540         ubsecstats.hst_obytes += dmap->d_alloc.dma_size;
1541
1542         ubsec_dma_sync(&dmap->d_alloc,
1543             BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
1544         if (q->q_dst_map != NULL && q->q_dst_map != q->q_src_map) {
1545                 bus_dmamap_sync(sc->sc_dmat, q->q_dst_map,
1546                     BUS_DMASYNC_POSTREAD);
1547                 bus_dmamap_unload(sc->sc_dmat, q->q_dst_map);
1548                 bus_dmamap_destroy(sc->sc_dmat, q->q_dst_map);
1549         }
1550         bus_dmamap_sync(sc->sc_dmat, q->q_src_map, BUS_DMASYNC_POSTWRITE);
1551         bus_dmamap_unload(sc->sc_dmat, q->q_src_map);
1552         bus_dmamap_destroy(sc->sc_dmat, q->q_src_map);
1553
1554         if ((crp->crp_flags & CRYPTO_F_IMBUF) && (q->q_src_m != q->q_dst_m)) {
1555                 m_freem(q->q_src_m);
1556                 crp->crp_buf = (caddr_t)q->q_dst_m;
1557         }
1558         ubsecstats.hst_obytes += ((struct mbuf *)crp->crp_buf)->m_len;
1559
1560         /* copy out IV for future use */
1561         if (q->q_flags & UBSEC_QFLAGS_COPYOUTIV) {
1562                 for (crd = crp->crp_desc; crd; crd = crd->crd_next) {
1563                         if (crd->crd_alg != CRYPTO_DES_CBC &&
1564                             crd->crd_alg != CRYPTO_3DES_CBC)
1565                                 continue;
1566                         if (crp->crp_flags & CRYPTO_F_IMBUF)
1567                                 m_copydata((struct mbuf *)crp->crp_buf,
1568                                     crd->crd_skip + crd->crd_len - 8, 8,
1569                                     (caddr_t)sc->sc_sessions[q->q_sesn].ses_iv);
1570                         else if (crp->crp_flags & CRYPTO_F_IOV) {
1571                                 cuio_copydata((struct uio *)crp->crp_buf,
1572                                     crd->crd_skip + crd->crd_len - 8, 8,
1573                                     (caddr_t)sc->sc_sessions[q->q_sesn].ses_iv);
1574                         }
1575                         break;
1576                 }
1577         }
1578
1579         for (crd = crp->crp_desc; crd; crd = crd->crd_next) {
1580                 if (crd->crd_alg != CRYPTO_MD5_HMAC &&
1581                     crd->crd_alg != CRYPTO_SHA1_HMAC)
1582                         continue;
1583                 if (crp->crp_flags & CRYPTO_F_IMBUF)
1584                         m_copyback((struct mbuf *)crp->crp_buf,
1585                             crd->crd_inject, 12,
1586                             (caddr_t)dmap->d_dma->d_macbuf);
1587                 else if (crp->crp_flags & CRYPTO_F_IOV && crp->crp_mac)
1588                         bcopy((caddr_t)dmap->d_dma->d_macbuf,
1589                             crp->crp_mac, 12);
1590                 break;
1591         }
1592         SIMPLEQ_INSERT_TAIL(&sc->sc_freequeue, q, q_next);
1593         crypto_done(crp);
1594 }
1595
1596 static void
1597 ubsec_mcopy(struct mbuf *srcm, struct mbuf *dstm, int hoffset, int toffset)
1598 {
1599         int i, j, dlen, slen;
1600         caddr_t dptr, sptr;
1601
1602         j = 0;
1603         sptr = srcm->m_data;
1604         slen = srcm->m_len;
1605         dptr = dstm->m_data;
1606         dlen = dstm->m_len;
1607
1608         while (1) {
1609                 for (i = 0; i < min(slen, dlen); i++) {
1610                         if (j < hoffset || j >= toffset)
1611                                 *dptr++ = *sptr++;
1612                         slen--;
1613                         dlen--;
1614                         j++;
1615                 }
1616                 if (slen == 0) {
1617                         srcm = srcm->m_next;
1618                         if (srcm == NULL)
1619                                 return;
1620                         sptr = srcm->m_data;
1621                         slen = srcm->m_len;
1622                 }
1623                 if (dlen == 0) {
1624                         dstm = dstm->m_next;
1625                         if (dstm == NULL)
1626                                 return;
1627                         dptr = dstm->m_data;
1628                         dlen = dstm->m_len;
1629                 }
1630         }
1631 }
1632
1633 /*
1634  * feed the key generator, must be called at splimp() or higher.
1635  */
1636 static int
1637 ubsec_feed2(struct ubsec_softc *sc)
1638 {
1639         struct ubsec_q2 *q;
1640
1641         while (!SIMPLEQ_EMPTY(&sc->sc_queue2)) {
1642                 if (READ_REG(sc, BS_STAT) & BS_STAT_MCR2_FULL)
1643                         break;
1644                 q = SIMPLEQ_FIRST(&sc->sc_queue2);
1645
1646                 ubsec_dma_sync(&q->q_mcr,
1647                     BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
1648                 ubsec_dma_sync(&q->q_ctx, BUS_DMASYNC_PREWRITE);
1649
1650                 WRITE_REG(sc, BS_MCR2, q->q_mcr.dma_paddr);
1651                 SIMPLEQ_REMOVE_HEAD(&sc->sc_queue2, q, q_next);
1652                 --sc->sc_nqueue2;
1653                 SIMPLEQ_INSERT_TAIL(&sc->sc_qchip2, q, q_next);
1654         }
1655         return (0);
1656 }
1657
1658 /*
1659  * Callback for handling random numbers
1660  */
1661 static void
1662 ubsec_callback2(struct ubsec_softc *sc, struct ubsec_q2 *q)
1663 {
1664         struct cryptkop *krp;
1665         struct ubsec_ctx_keyop *ctx;
1666
1667         ctx = (struct ubsec_ctx_keyop *)q->q_ctx.dma_vaddr;
1668         ubsec_dma_sync(&q->q_ctx, BUS_DMASYNC_POSTWRITE);
1669
1670         switch (q->q_type) {
1671 #ifndef UBSEC_NO_RNG
1672         case UBS_CTXOP_RNGBYPASS: {
1673                 struct ubsec_q2_rng *rng = (struct ubsec_q2_rng *)q;
1674
1675                 ubsec_dma_sync(&rng->rng_buf, BUS_DMASYNC_POSTREAD);
1676                 (*sc->sc_harvest)(sc->sc_rndtest,
1677                         rng->rng_buf.dma_vaddr,
1678                         UBSEC_RNG_BUFSIZ*sizeof (u_int32_t));
1679                 rng->rng_used = 0;
1680                 callout_reset(&sc->sc_rngto, sc->sc_rnghz, ubsec_rng, sc);
1681                 break;
1682         }
1683 #endif
1684         case UBS_CTXOP_MODEXP: {
1685                 struct ubsec_q2_modexp *me = (struct ubsec_q2_modexp *)q;
1686                 u_int rlen, clen;
1687
1688                 krp = me->me_krp;
1689                 rlen = (me->me_modbits + 7) / 8;
1690                 clen = (krp->krp_param[krp->krp_iparams].crp_nbits + 7) / 8;
1691
1692                 ubsec_dma_sync(&me->me_M, BUS_DMASYNC_POSTWRITE);
1693                 ubsec_dma_sync(&me->me_E, BUS_DMASYNC_POSTWRITE);
1694                 ubsec_dma_sync(&me->me_C, BUS_DMASYNC_POSTREAD);
1695                 ubsec_dma_sync(&me->me_epb, BUS_DMASYNC_POSTWRITE);
1696
1697                 if (clen < rlen)
1698                         krp->krp_status = E2BIG;
1699                 else {
1700                         if (sc->sc_flags & UBS_FLAGS_HWNORM) {
1701                                 bzero(krp->krp_param[krp->krp_iparams].crp_p,
1702                                     (krp->krp_param[krp->krp_iparams].crp_nbits
1703                                         + 7) / 8);
1704                                 bcopy(me->me_C.dma_vaddr,
1705                                     krp->krp_param[krp->krp_iparams].crp_p,
1706                                     (me->me_modbits + 7) / 8);
1707                         } else
1708                                 ubsec_kshift_l(me->me_shiftbits,
1709                                     me->me_C.dma_vaddr, me->me_normbits,
1710                                     krp->krp_param[krp->krp_iparams].crp_p,
1711                                     krp->krp_param[krp->krp_iparams].crp_nbits);
1712                 }
1713
1714                 crypto_kdone(krp);
1715
1716                 /* bzero all potentially sensitive data */
1717                 bzero(me->me_E.dma_vaddr, me->me_E.dma_size);
1718                 bzero(me->me_M.dma_vaddr, me->me_M.dma_size);
1719                 bzero(me->me_C.dma_vaddr, me->me_C.dma_size);
1720                 bzero(me->me_q.q_ctx.dma_vaddr, me->me_q.q_ctx.dma_size);
1721
1722                 /* Can't free here, so put us on the free list. */
1723                 SIMPLEQ_INSERT_TAIL(&sc->sc_q2free, &me->me_q, q_next);
1724                 break;
1725         }
1726         case UBS_CTXOP_RSAPRIV: {
1727                 struct ubsec_q2_rsapriv *rp = (struct ubsec_q2_rsapriv *)q;
1728                 u_int len;
1729
1730                 krp = rp->rpr_krp;
1731                 ubsec_dma_sync(&rp->rpr_msgin, BUS_DMASYNC_POSTWRITE);
1732                 ubsec_dma_sync(&rp->rpr_msgout, BUS_DMASYNC_POSTREAD);
1733
1734                 len = (krp->krp_param[UBS_RSAPRIV_PAR_MSGOUT].crp_nbits + 7) / 8;
1735                 bcopy(rp->rpr_msgout.dma_vaddr,
1736                     krp->krp_param[UBS_RSAPRIV_PAR_MSGOUT].crp_p, len);
1737
1738                 crypto_kdone(krp);
1739
1740                 bzero(rp->rpr_msgin.dma_vaddr, rp->rpr_msgin.dma_size);
1741                 bzero(rp->rpr_msgout.dma_vaddr, rp->rpr_msgout.dma_size);
1742                 bzero(rp->rpr_q.q_ctx.dma_vaddr, rp->rpr_q.q_ctx.dma_size);
1743
1744                 /* Can't free here, so put us on the free list. */
1745                 SIMPLEQ_INSERT_TAIL(&sc->sc_q2free, &rp->rpr_q, q_next);
1746                 break;
1747         }
1748         default:
1749                 device_printf(sc->sc_dev, "unknown ctx op: %x\n",
1750                     letoh16(ctx->ctx_op));
1751                 break;
1752         }
1753 }
1754
1755 #ifndef UBSEC_NO_RNG
1756 static void
1757 ubsec_rng(void *vsc)
1758 {
1759         struct ubsec_softc *sc = vsc;
1760         struct ubsec_q2_rng *rng = &sc->sc_rng;
1761         struct ubsec_mcr *mcr;
1762         struct ubsec_ctx_rngbypass *ctx;
1763
1764         crit_enter();
1765         if (rng->rng_used) {
1766                 crit_exit();
1767                 return;
1768         }
1769         sc->sc_nqueue2++;
1770         if (sc->sc_nqueue2 >= UBS_MAX_NQUEUE)
1771                 goto out;
1772
1773         mcr = (struct ubsec_mcr *)rng->rng_q.q_mcr.dma_vaddr;
1774         ctx = (struct ubsec_ctx_rngbypass *)rng->rng_q.q_ctx.dma_vaddr;
1775
1776         mcr->mcr_pkts = htole16(1);
1777         mcr->mcr_flags = 0;
1778         mcr->mcr_cmdctxp = htole32(rng->rng_q.q_ctx.dma_paddr);
1779         mcr->mcr_ipktbuf.pb_addr = mcr->mcr_ipktbuf.pb_next = 0;
1780         mcr->mcr_ipktbuf.pb_len = 0;
1781         mcr->mcr_reserved = mcr->mcr_pktlen = 0;
1782         mcr->mcr_opktbuf.pb_addr = htole32(rng->rng_buf.dma_paddr);
1783         mcr->mcr_opktbuf.pb_len = htole32(((sizeof(u_int32_t) * UBSEC_RNG_BUFSIZ)) &
1784             UBS_PKTBUF_LEN);
1785         mcr->mcr_opktbuf.pb_next = 0;
1786
1787         ctx->rbp_len = htole16(sizeof(struct ubsec_ctx_rngbypass));
1788         ctx->rbp_op = htole16(UBS_CTXOP_RNGBYPASS);
1789         rng->rng_q.q_type = UBS_CTXOP_RNGBYPASS;
1790
1791         ubsec_dma_sync(&rng->rng_buf, BUS_DMASYNC_PREREAD);
1792
1793         SIMPLEQ_INSERT_TAIL(&sc->sc_queue2, &rng->rng_q, q_next);
1794         rng->rng_used = 1;
1795         ubsec_feed2(sc);
1796         ubsecstats.hst_rng++;
1797         crit_exit();
1798
1799         return;
1800
1801 out:
1802         /*
1803          * Something weird happened, generate our own call back.
1804          */
1805         sc->sc_nqueue2--;
1806         crit_exit();
1807         callout_reset(&sc->sc_rngto, sc->sc_rnghz, ubsec_rng, sc);
1808 }
1809 #endif /* UBSEC_NO_RNG */
1810
1811 static void
1812 ubsec_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1813 {
1814         bus_addr_t *paddr = (bus_addr_t*) arg;
1815         *paddr = segs->ds_addr;
1816 }
1817
1818 static int
1819 ubsec_dma_malloc(
1820         struct ubsec_softc *sc,
1821         bus_size_t size,
1822         struct ubsec_dma_alloc *dma,
1823         int mapflags
1824 )
1825 {
1826         int r;
1827
1828         /* XXX could specify sc_dmat as parent but that just adds overhead */
1829         r = bus_dma_tag_create(NULL,                    /* parent */
1830                                1, 0,                    /* alignment, bounds */
1831                                BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
1832                                BUS_SPACE_MAXADDR,       /* highaddr */
1833                                NULL, NULL,              /* filter, filterarg */
1834                                size,                    /* maxsize */
1835                                1,                       /* nsegments */
1836                                size,                    /* maxsegsize */
1837                                BUS_DMA_ALLOCNOW,        /* flags */
1838                                &dma->dma_tag);
1839         if (r != 0) {
1840                 device_printf(sc->sc_dev, "ubsec_dma_malloc: "
1841                         "bus_dma_tag_create failed; error %u\n", r);
1842                 goto fail_0;
1843         }
1844
1845         r = bus_dmamap_create(dma->dma_tag, BUS_DMA_NOWAIT, &dma->dma_map);
1846         if (r != 0) {
1847                 device_printf(sc->sc_dev, "ubsec_dma_malloc: "
1848                         "bus_dmamap_create failed; error %u\n", r);
1849                 goto fail_1;
1850         }
1851
1852         r = bus_dmamem_alloc(dma->dma_tag, (void**) &dma->dma_vaddr,
1853                              BUS_DMA_NOWAIT, &dma->dma_map);
1854         if (r != 0) {
1855                 device_printf(sc->sc_dev, "ubsec_dma_malloc: "
1856                         "bus_dmammem_alloc failed; size %u, error %u\n",
1857                         size, r);
1858                 goto fail_2;
1859         }
1860
1861         r = bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->dma_vaddr,
1862                             size,
1863                             ubsec_dmamap_cb,
1864                             &dma->dma_paddr,
1865                             mapflags | BUS_DMA_NOWAIT);
1866         if (r != 0) {
1867                 device_printf(sc->sc_dev, "ubsec_dma_malloc: "
1868                         "bus_dmamap_load failed; error %u\n", r);
1869                 goto fail_3;
1870         }
1871
1872         dma->dma_size = size;
1873         return (0);
1874
1875 fail_3:
1876         bus_dmamap_unload(dma->dma_tag, dma->dma_map);
1877 fail_2:
1878         bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map);
1879 fail_1:
1880         bus_dmamap_destroy(dma->dma_tag, dma->dma_map);
1881         bus_dma_tag_destroy(dma->dma_tag);
1882 fail_0:
1883         dma->dma_map = NULL;
1884         dma->dma_tag = NULL;
1885         return (r);
1886 }
1887
1888 static void
1889 ubsec_dma_free(struct ubsec_softc *sc, struct ubsec_dma_alloc *dma)
1890 {
1891         bus_dmamap_unload(dma->dma_tag, dma->dma_map);
1892         bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map);
1893         bus_dmamap_destroy(dma->dma_tag, dma->dma_map);
1894         bus_dma_tag_destroy(dma->dma_tag);
1895 }
1896
1897 /*
1898  * Resets the board.  Values in the regesters are left as is
1899  * from the reset (i.e. initial values are assigned elsewhere).
1900  */
1901 static void
1902 ubsec_reset_board(struct ubsec_softc *sc)
1903 {
1904     volatile u_int32_t ctrl;
1905
1906     ctrl = READ_REG(sc, BS_CTRL);
1907     ctrl |= BS_CTRL_RESET;
1908     WRITE_REG(sc, BS_CTRL, ctrl);
1909
1910     /*
1911      * Wait aprox. 30 PCI clocks = 900 ns = 0.9 us
1912      */
1913     DELAY(10);
1914 }
1915
1916 /*
1917  * Init Broadcom registers
1918  */
1919 static void
1920 ubsec_init_board(struct ubsec_softc *sc)
1921 {
1922         u_int32_t ctrl;
1923
1924         ctrl = READ_REG(sc, BS_CTRL);
1925         ctrl &= ~(BS_CTRL_BE32 | BS_CTRL_BE64);
1926         ctrl |= BS_CTRL_LITTLE_ENDIAN | BS_CTRL_MCR1INT;
1927
1928         if (sc->sc_flags & (UBS_FLAGS_KEY|UBS_FLAGS_RNG))
1929                 ctrl |= BS_CTRL_MCR2INT;
1930         else
1931                 ctrl &= ~BS_CTRL_MCR2INT;
1932
1933         if (sc->sc_flags & UBS_FLAGS_HWNORM)
1934                 ctrl &= ~BS_CTRL_SWNORM;
1935
1936         WRITE_REG(sc, BS_CTRL, ctrl);
1937 }
1938
1939 /*
1940  * Init Broadcom PCI registers
1941  */
1942 static void
1943 ubsec_init_pciregs(device_t dev)
1944 {
1945 #if 0
1946         u_int32_t misc;
1947
1948         misc = pci_conf_read(pc, pa->pa_tag, BS_RTY_TOUT);
1949         misc = (misc & ~(UBS_PCI_RTY_MASK << UBS_PCI_RTY_SHIFT))
1950             | ((UBS_DEF_RTY & 0xff) << UBS_PCI_RTY_SHIFT);
1951         misc = (misc & ~(UBS_PCI_TOUT_MASK << UBS_PCI_TOUT_SHIFT))
1952             | ((UBS_DEF_TOUT & 0xff) << UBS_PCI_TOUT_SHIFT);
1953         pci_conf_write(pc, pa->pa_tag, BS_RTY_TOUT, misc);
1954 #endif
1955
1956         /*
1957          * This will set the cache line size to 1, this will
1958          * force the BCM58xx chip just to do burst read/writes.
1959          * Cache line read/writes are to slow
1960          */
1961         pci_write_config(dev, PCIR_CACHELNSZ, UBS_DEF_CACHELINE, 1);
1962 }
1963
1964 /*
1965  * Clean up after a chip crash.
1966  * It is assumed that the caller in splimp()
1967  */
1968 static void
1969 ubsec_cleanchip(struct ubsec_softc *sc)
1970 {
1971         struct ubsec_q *q;
1972
1973         while (!SIMPLEQ_EMPTY(&sc->sc_qchip)) {
1974                 q = SIMPLEQ_FIRST(&sc->sc_qchip);
1975                 SIMPLEQ_REMOVE_HEAD(&sc->sc_qchip, q, q_next);
1976                 ubsec_free_q(sc, q);
1977         }
1978         sc->sc_nqchip = 0;
1979 }
1980
1981 /*
1982  * free a ubsec_q
1983  * It is assumed that the caller is within spimp()
1984  */
1985 static int
1986 ubsec_free_q(struct ubsec_softc *sc, struct ubsec_q *q)
1987 {
1988         struct ubsec_q *q2;
1989         struct cryptop *crp;
1990         int npkts;
1991         int i;
1992
1993         npkts = q->q_nstacked_mcrs;
1994
1995         for (i = 0; i < npkts; i++) {
1996                 if(q->q_stacked_mcr[i]) {
1997                         q2 = q->q_stacked_mcr[i];
1998
1999                         if ((q2->q_dst_m != NULL) && (q2->q_src_m != q2->q_dst_m)) 
2000                                 m_freem(q2->q_dst_m);
2001
2002                         crp = (struct cryptop *)q2->q_crp;
2003                         
2004                         SIMPLEQ_INSERT_TAIL(&sc->sc_freequeue, q2, q_next);
2005                         
2006                         crp->crp_etype = EFAULT;
2007                         crypto_done(crp);
2008                 } else {
2009                         break;
2010                 }
2011         }
2012
2013         /*
2014          * Free header MCR
2015          */
2016         if ((q->q_dst_m != NULL) && (q->q_src_m != q->q_dst_m))
2017                 m_freem(q->q_dst_m);
2018
2019         crp = (struct cryptop *)q->q_crp;
2020         
2021         SIMPLEQ_INSERT_TAIL(&sc->sc_freequeue, q, q_next);
2022         
2023         crp->crp_etype = EFAULT;
2024         crypto_done(crp);
2025         return(0);
2026 }
2027
2028 /*
2029  * Routine to reset the chip and clean up.
2030  * It is assumed that the caller is in splimp()
2031  */
2032 static void
2033 ubsec_totalreset(struct ubsec_softc *sc)
2034 {
2035         ubsec_reset_board(sc);
2036         ubsec_init_board(sc);
2037         ubsec_cleanchip(sc);
2038 }
2039
2040 static int
2041 ubsec_dmamap_aligned(struct ubsec_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)) &&
2049                     (op->segs[i].ds_len & 3))
2050                         return (0);
2051         }
2052         return (1);
2053 }
2054
2055 static void
2056 ubsec_kfree(struct ubsec_softc *sc, struct ubsec_q2 *q)
2057 {
2058         switch (q->q_type) {
2059         case UBS_CTXOP_MODEXP: {
2060                 struct ubsec_q2_modexp *me = (struct ubsec_q2_modexp *)q;
2061
2062                 ubsec_dma_free(sc, &me->me_q.q_mcr);
2063                 ubsec_dma_free(sc, &me->me_q.q_ctx);
2064                 ubsec_dma_free(sc, &me->me_M);
2065                 ubsec_dma_free(sc, &me->me_E);
2066                 ubsec_dma_free(sc, &me->me_C);
2067                 ubsec_dma_free(sc, &me->me_epb);
2068                 kfree(me, M_DEVBUF);
2069                 break;
2070         }
2071         case UBS_CTXOP_RSAPRIV: {
2072                 struct ubsec_q2_rsapriv *rp = (struct ubsec_q2_rsapriv *)q;
2073
2074                 ubsec_dma_free(sc, &rp->rpr_q.q_mcr);
2075                 ubsec_dma_free(sc, &rp->rpr_q.q_ctx);
2076                 ubsec_dma_free(sc, &rp->rpr_msgin);
2077                 ubsec_dma_free(sc, &rp->rpr_msgout);
2078                 kfree(rp, M_DEVBUF);
2079                 break;
2080         }
2081         default:
2082                 device_printf(sc->sc_dev, "invalid kfree 0x%x\n", q->q_type);
2083                 break;
2084         }
2085 }
2086
2087 static int
2088 ubsec_kprocess(void *arg, struct cryptkop *krp, int hint)
2089 {
2090         struct ubsec_softc *sc = arg;
2091         int r;
2092
2093         if (krp == NULL || krp->krp_callback == NULL)
2094                 return (EINVAL);
2095
2096         while (!SIMPLEQ_EMPTY(&sc->sc_q2free)) {
2097                 struct ubsec_q2 *q;
2098
2099                 q = SIMPLEQ_FIRST(&sc->sc_q2free);
2100                 SIMPLEQ_REMOVE_HEAD(&sc->sc_q2free, q, q_next);
2101                 ubsec_kfree(sc, q);
2102         }
2103
2104         switch (krp->krp_op) {
2105         case CRK_MOD_EXP:
2106                 if (sc->sc_flags & UBS_FLAGS_HWNORM)
2107                         r = ubsec_kprocess_modexp_hw(sc, krp, hint);
2108                 else
2109                         r = ubsec_kprocess_modexp_sw(sc, krp, hint);
2110                 break;
2111         case CRK_MOD_EXP_CRT:
2112                 return (ubsec_kprocess_rsapriv(sc, krp, hint));
2113         default:
2114                 device_printf(sc->sc_dev, "kprocess: invalid op 0x%x\n",
2115                     krp->krp_op);
2116                 krp->krp_status = EOPNOTSUPP;
2117                 crypto_kdone(krp);
2118                 return (0);
2119         }
2120         return (0);                     /* silence compiler */
2121 }
2122
2123 /*
2124  * Start computation of cr[C] = (cr[M] ^ cr[E]) mod cr[N] (sw normalization)
2125  */
2126 static int
2127 ubsec_kprocess_modexp_sw(struct ubsec_softc *sc, struct cryptkop *krp, int hint)
2128 {
2129         struct ubsec_q2_modexp *me;
2130         struct ubsec_mcr *mcr;
2131         struct ubsec_ctx_modexp *ctx;
2132         struct ubsec_pktbuf *epb;
2133         int err = 0;
2134         u_int nbits, normbits, mbits, shiftbits, ebits;
2135
2136         me = kmalloc(sizeof *me, M_DEVBUF, M_INTWAIT | M_ZERO);
2137         me->me_krp = krp;
2138         me->me_q.q_type = UBS_CTXOP_MODEXP;
2139
2140         nbits = ubsec_ksigbits(&krp->krp_param[UBS_MODEXP_PAR_N]);
2141         if (nbits <= 512)
2142                 normbits = 512;
2143         else if (nbits <= 768)
2144                 normbits = 768;
2145         else if (nbits <= 1024)
2146                 normbits = 1024;
2147         else if (sc->sc_flags & UBS_FLAGS_BIGKEY && nbits <= 1536)
2148                 normbits = 1536;
2149         else if (sc->sc_flags & UBS_FLAGS_BIGKEY && nbits <= 2048)
2150                 normbits = 2048;
2151         else {
2152                 err = E2BIG;
2153                 goto errout;
2154         }
2155
2156         shiftbits = normbits - nbits;
2157
2158         me->me_modbits = nbits;
2159         me->me_shiftbits = shiftbits;
2160         me->me_normbits = normbits;
2161
2162         /* Sanity check: result bits must be >= true modulus bits. */
2163         if (krp->krp_param[krp->krp_iparams].crp_nbits < nbits) {
2164                 err = ERANGE;
2165                 goto errout;
2166         }
2167
2168         if (ubsec_dma_malloc(sc, sizeof(struct ubsec_mcr),
2169             &me->me_q.q_mcr, 0)) {
2170                 err = ENOMEM;
2171                 goto errout;
2172         }
2173         mcr = (struct ubsec_mcr *)me->me_q.q_mcr.dma_vaddr;
2174
2175         if (ubsec_dma_malloc(sc, sizeof(struct ubsec_ctx_modexp),
2176             &me->me_q.q_ctx, 0)) {
2177                 err = ENOMEM;
2178                 goto errout;
2179         }
2180
2181         mbits = ubsec_ksigbits(&krp->krp_param[UBS_MODEXP_PAR_M]);
2182         if (mbits > nbits) {
2183                 err = E2BIG;
2184                 goto errout;
2185         }
2186         if (ubsec_dma_malloc(sc, normbits / 8, &me->me_M, 0)) {
2187                 err = ENOMEM;
2188                 goto errout;
2189         }
2190         ubsec_kshift_r(shiftbits,
2191             krp->krp_param[UBS_MODEXP_PAR_M].crp_p, mbits,
2192             me->me_M.dma_vaddr, normbits);
2193
2194         if (ubsec_dma_malloc(sc, normbits / 8, &me->me_C, 0)) {
2195                 err = ENOMEM;
2196                 goto errout;
2197         }
2198         bzero(me->me_C.dma_vaddr, me->me_C.dma_size);
2199
2200         ebits = ubsec_ksigbits(&krp->krp_param[UBS_MODEXP_PAR_E]);
2201         if (ebits > nbits) {
2202                 err = E2BIG;
2203                 goto errout;
2204         }
2205         if (ubsec_dma_malloc(sc, normbits / 8, &me->me_E, 0)) {
2206                 err = ENOMEM;
2207                 goto errout;
2208         }
2209         ubsec_kshift_r(shiftbits,
2210             krp->krp_param[UBS_MODEXP_PAR_E].crp_p, ebits,
2211             me->me_E.dma_vaddr, normbits);
2212
2213         if (ubsec_dma_malloc(sc, sizeof(struct ubsec_pktbuf),
2214             &me->me_epb, 0)) {
2215                 err = ENOMEM;
2216                 goto errout;
2217         }
2218         epb = (struct ubsec_pktbuf *)me->me_epb.dma_vaddr;
2219         epb->pb_addr = htole32(me->me_E.dma_paddr);
2220         epb->pb_next = 0;
2221         epb->pb_len = htole32(normbits / 8);
2222
2223 #ifdef UBSEC_DEBUG
2224         if (ubsec_debug) {
2225                 kprintf("Epb ");
2226                 ubsec_dump_pb(epb);
2227         }
2228 #endif
2229
2230         mcr->mcr_pkts = htole16(1);
2231         mcr->mcr_flags = 0;
2232         mcr->mcr_cmdctxp = htole32(me->me_q.q_ctx.dma_paddr);
2233         mcr->mcr_reserved = 0;
2234         mcr->mcr_pktlen = 0;
2235
2236         mcr->mcr_ipktbuf.pb_addr = htole32(me->me_M.dma_paddr);
2237         mcr->mcr_ipktbuf.pb_len = htole32(normbits / 8);
2238         mcr->mcr_ipktbuf.pb_next = htole32(me->me_epb.dma_paddr);
2239
2240         mcr->mcr_opktbuf.pb_addr = htole32(me->me_C.dma_paddr);
2241         mcr->mcr_opktbuf.pb_next = 0;
2242         mcr->mcr_opktbuf.pb_len = htole32(normbits / 8);
2243
2244 #ifdef DIAGNOSTIC
2245         /* Misaligned output buffer will hang the chip. */
2246         if ((letoh32(mcr->mcr_opktbuf.pb_addr) & 3) != 0)
2247                 panic("%s: modexp invalid addr 0x%x\n",
2248                     device_get_nameunit(sc->sc_dev),
2249                     letoh32(mcr->mcr_opktbuf.pb_addr));
2250         if ((letoh32(mcr->mcr_opktbuf.pb_len) & 3) != 0)
2251                 panic("%s: modexp invalid len 0x%x\n",
2252                     device_get_nameunit(sc->sc_dev),
2253                     letoh32(mcr->mcr_opktbuf.pb_len));
2254 #endif
2255
2256         ctx = (struct ubsec_ctx_modexp *)me->me_q.q_ctx.dma_vaddr;
2257         bzero(ctx, sizeof(*ctx));
2258         ubsec_kshift_r(shiftbits,
2259             krp->krp_param[UBS_MODEXP_PAR_N].crp_p, nbits,
2260             ctx->me_N, normbits);
2261         ctx->me_len = htole16((normbits / 8) + (4 * sizeof(u_int16_t)));
2262         ctx->me_op = htole16(UBS_CTXOP_MODEXP);
2263         ctx->me_E_len = htole16(nbits);
2264         ctx->me_N_len = htole16(nbits);
2265
2266 #ifdef UBSEC_DEBUG
2267         if (ubsec_debug) {
2268                 ubsec_dump_mcr(mcr);
2269                 ubsec_dump_ctx2((struct ubsec_ctx_keyop *)ctx);
2270         }
2271 #endif
2272
2273         /*
2274          * ubsec_feed2 will sync mcr and ctx, we just need to sync
2275          * everything else.
2276          */
2277         ubsec_dma_sync(&me->me_M, BUS_DMASYNC_PREWRITE);
2278         ubsec_dma_sync(&me->me_E, BUS_DMASYNC_PREWRITE);
2279         ubsec_dma_sync(&me->me_C, BUS_DMASYNC_PREREAD);
2280         ubsec_dma_sync(&me->me_epb, BUS_DMASYNC_PREWRITE);
2281
2282         /* Enqueue and we're done... */
2283         crit_enter();
2284         SIMPLEQ_INSERT_TAIL(&sc->sc_queue2, &me->me_q, q_next);
2285         ubsec_feed2(sc);
2286         ubsecstats.hst_modexp++;
2287         crit_exit();
2288
2289         return (0);
2290
2291 errout:
2292         if (me != NULL) {
2293                 if (me->me_q.q_mcr.dma_map != NULL)
2294                         ubsec_dma_free(sc, &me->me_q.q_mcr);
2295                 if (me->me_q.q_ctx.dma_map != NULL) {
2296                         bzero(me->me_q.q_ctx.dma_vaddr, me->me_q.q_ctx.dma_size);
2297                         ubsec_dma_free(sc, &me->me_q.q_ctx);
2298                 }
2299                 if (me->me_M.dma_map != NULL) {
2300                         bzero(me->me_M.dma_vaddr, me->me_M.dma_size);
2301                         ubsec_dma_free(sc, &me->me_M);
2302                 }
2303                 if (me->me_E.dma_map != NULL) {
2304                         bzero(me->me_E.dma_vaddr, me->me_E.dma_size);
2305                         ubsec_dma_free(sc, &me->me_E);
2306                 }
2307                 if (me->me_C.dma_map != NULL) {
2308                         bzero(me->me_C.dma_vaddr, me->me_C.dma_size);
2309                         ubsec_dma_free(sc, &me->me_C);
2310                 }
2311                 if (me->me_epb.dma_map != NULL)
2312                         ubsec_dma_free(sc, &me->me_epb);
2313                 kfree(me, M_DEVBUF);
2314         }
2315         krp->krp_status = err;
2316         crypto_kdone(krp);
2317         return (0);
2318 }
2319
2320 /*
2321  * Start computation of cr[C] = (cr[M] ^ cr[E]) mod cr[N] (hw normalization)
2322  */
2323 static int
2324 ubsec_kprocess_modexp_hw(struct ubsec_softc *sc, struct cryptkop *krp, int hint)
2325 {
2326         struct ubsec_q2_modexp *me;
2327         struct ubsec_mcr *mcr;
2328         struct ubsec_ctx_modexp *ctx;
2329         struct ubsec_pktbuf *epb;
2330         int err = 0;
2331         u_int nbits, normbits, mbits, shiftbits, ebits;
2332
2333         me = kmalloc(sizeof *me, M_DEVBUF, M_INTWAIT | M_ZERO);
2334         me->me_krp = krp;
2335         me->me_q.q_type = UBS_CTXOP_MODEXP;
2336
2337         nbits = ubsec_ksigbits(&krp->krp_param[UBS_MODEXP_PAR_N]);
2338         if (nbits <= 512)
2339                 normbits = 512;
2340         else if (nbits <= 768)
2341                 normbits = 768;
2342         else if (nbits <= 1024)
2343                 normbits = 1024;
2344         else if (sc->sc_flags & UBS_FLAGS_BIGKEY && nbits <= 1536)
2345                 normbits = 1536;
2346         else if (sc->sc_flags & UBS_FLAGS_BIGKEY && nbits <= 2048)
2347                 normbits = 2048;
2348         else {
2349                 err = E2BIG;
2350                 goto errout;
2351         }
2352
2353         shiftbits = normbits - nbits;
2354
2355         /* XXX ??? */
2356         me->me_modbits = nbits;
2357         me->me_shiftbits = shiftbits;
2358         me->me_normbits = normbits;
2359
2360         /* Sanity check: result bits must be >= true modulus bits. */
2361         if (krp->krp_param[krp->krp_iparams].crp_nbits < nbits) {
2362                 err = ERANGE;
2363                 goto errout;
2364         }
2365
2366         if (ubsec_dma_malloc(sc, sizeof(struct ubsec_mcr),
2367             &me->me_q.q_mcr, 0)) {
2368                 err = ENOMEM;
2369                 goto errout;
2370         }
2371         mcr = (struct ubsec_mcr *)me->me_q.q_mcr.dma_vaddr;
2372
2373         if (ubsec_dma_malloc(sc, sizeof(struct ubsec_ctx_modexp),
2374             &me->me_q.q_ctx, 0)) {
2375                 err = ENOMEM;
2376                 goto errout;
2377         }
2378
2379         mbits = ubsec_ksigbits(&krp->krp_param[UBS_MODEXP_PAR_M]);
2380         if (mbits > nbits) {
2381                 err = E2BIG;
2382                 goto errout;
2383         }
2384         if (ubsec_dma_malloc(sc, normbits / 8, &me->me_M, 0)) {
2385                 err = ENOMEM;
2386                 goto errout;
2387         }
2388         bzero(me->me_M.dma_vaddr, normbits / 8);
2389         bcopy(krp->krp_param[UBS_MODEXP_PAR_M].crp_p,
2390             me->me_M.dma_vaddr, (mbits + 7) / 8);
2391
2392         if (ubsec_dma_malloc(sc, normbits / 8, &me->me_C, 0)) {
2393                 err = ENOMEM;
2394                 goto errout;
2395         }
2396         bzero(me->me_C.dma_vaddr, me->me_C.dma_size);
2397
2398         ebits = ubsec_ksigbits(&krp->krp_param[UBS_MODEXP_PAR_E]);
2399         if (ebits > nbits) {
2400                 err = E2BIG;
2401                 goto errout;
2402         }
2403         if (ubsec_dma_malloc(sc, normbits / 8, &me->me_E, 0)) {
2404                 err = ENOMEM;
2405                 goto errout;
2406         }
2407         bzero(me->me_E.dma_vaddr, normbits / 8);
2408         bcopy(krp->krp_param[UBS_MODEXP_PAR_E].crp_p,
2409             me->me_E.dma_vaddr, (ebits + 7) / 8);
2410
2411         if (ubsec_dma_malloc(sc, sizeof(struct ubsec_pktbuf),
2412             &me->me_epb, 0)) {
2413                 err = ENOMEM;
2414                 goto errout;
2415         }
2416         epb = (struct ubsec_pktbuf *)me->me_epb.dma_vaddr;
2417         epb->pb_addr = htole32(me->me_E.dma_paddr);
2418         epb->pb_next = 0;
2419         epb->pb_len = htole32((ebits + 7) / 8);
2420
2421 #ifdef UBSEC_DEBUG
2422         if (ubsec_debug) {
2423                 kprintf("Epb ");
2424                 ubsec_dump_pb(epb);
2425         }
2426 #endif
2427
2428         mcr->mcr_pkts = htole16(1);
2429         mcr->mcr_flags = 0;
2430         mcr->mcr_cmdctxp = htole32(me->me_q.q_ctx.dma_paddr);
2431         mcr->mcr_reserved = 0;
2432         mcr->mcr_pktlen = 0;
2433
2434         mcr->mcr_ipktbuf.pb_addr = htole32(me->me_M.dma_paddr);
2435         mcr->mcr_ipktbuf.pb_len = htole32(normbits / 8);
2436         mcr->mcr_ipktbuf.pb_next = htole32(me->me_epb.dma_paddr);
2437
2438         mcr->mcr_opktbuf.pb_addr = htole32(me->me_C.dma_paddr);
2439         mcr->mcr_opktbuf.pb_next = 0;
2440         mcr->mcr_opktbuf.pb_len = htole32(normbits / 8);
2441
2442 #ifdef DIAGNOSTIC
2443         /* Misaligned output buffer will hang the chip. */
2444         if ((letoh32(mcr->mcr_opktbuf.pb_addr) & 3) != 0)
2445                 panic("%s: modexp invalid addr 0x%x\n",
2446                     device_get_nameunit(sc->sc_dev),
2447                     letoh32(mcr->mcr_opktbuf.pb_addr));
2448         if ((letoh32(mcr->mcr_opktbuf.pb_len) & 3) != 0)
2449                 panic("%s: modexp invalid len 0x%x\n",
2450                     device_get_nameunit(sc->sc_dev),
2451                     letoh32(mcr->mcr_opktbuf.pb_len));
2452 #endif
2453
2454         ctx = (struct ubsec_ctx_modexp *)me->me_q.q_ctx.dma_vaddr;
2455         bzero(ctx, sizeof(*ctx));
2456         bcopy(krp->krp_param[UBS_MODEXP_PAR_N].crp_p, ctx->me_N,
2457             (nbits + 7) / 8);
2458         ctx->me_len = htole16((normbits / 8) + (4 * sizeof(u_int16_t)));
2459         ctx->me_op = htole16(UBS_CTXOP_MODEXP);
2460         ctx->me_E_len = htole16(ebits);
2461         ctx->me_N_len = htole16(nbits);
2462
2463 #ifdef UBSEC_DEBUG
2464         if (ubsec_debug) {
2465                 ubsec_dump_mcr(mcr);
2466                 ubsec_dump_ctx2((struct ubsec_ctx_keyop *)ctx);
2467         }
2468 #endif
2469
2470         /*
2471          * ubsec_feed2 will sync mcr and ctx, we just need to sync
2472          * everything else.
2473          */
2474         ubsec_dma_sync(&me->me_M, BUS_DMASYNC_PREWRITE);
2475         ubsec_dma_sync(&me->me_E, BUS_DMASYNC_PREWRITE);
2476         ubsec_dma_sync(&me->me_C, BUS_DMASYNC_PREREAD);
2477         ubsec_dma_sync(&me->me_epb, BUS_DMASYNC_PREWRITE);
2478
2479         /* Enqueue and we're done... */
2480         crit_enter();
2481         SIMPLEQ_INSERT_TAIL(&sc->sc_queue2, &me->me_q, q_next);
2482         ubsec_feed2(sc);
2483         crit_exit();
2484
2485         return (0);
2486
2487 errout:
2488         if (me != NULL) {
2489                 if (me->me_q.q_mcr.dma_map != NULL)
2490                         ubsec_dma_free(sc, &me->me_q.q_mcr);
2491                 if (me->me_q.q_ctx.dma_map != NULL) {
2492                         bzero(me->me_q.q_ctx.dma_vaddr, me->me_q.q_ctx.dma_size);
2493                         ubsec_dma_free(sc, &me->me_q.q_ctx);
2494                 }
2495                 if (me->me_M.dma_map != NULL) {
2496                         bzero(me->me_M.dma_vaddr, me->me_M.dma_size);
2497                         ubsec_dma_free(sc, &me->me_M);
2498                 }
2499                 if (me->me_E.dma_map != NULL) {
2500                         bzero(me->me_E.dma_vaddr, me->me_E.dma_size);
2501                         ubsec_dma_free(sc, &me->me_E);
2502                 }
2503                 if (me->me_C.dma_map != NULL) {
2504                         bzero(me->me_C.dma_vaddr, me->me_C.dma_size);
2505                         ubsec_dma_free(sc, &me->me_C);
2506                 }
2507                 if (me->me_epb.dma_map != NULL)
2508                         ubsec_dma_free(sc, &me->me_epb);
2509                 kfree(me, M_DEVBUF);
2510         }
2511         krp->krp_status = err;
2512         crypto_kdone(krp);
2513         return (0);
2514 }
2515
2516 static int
2517 ubsec_kprocess_rsapriv(struct ubsec_softc *sc, struct cryptkop *krp, int hint)
2518 {
2519         struct ubsec_q2_rsapriv *rp = NULL;
2520         struct ubsec_mcr *mcr;
2521         struct ubsec_ctx_rsapriv *ctx;
2522         int err = 0;
2523         u_int padlen, msglen;
2524
2525         msglen = ubsec_ksigbits(&krp->krp_param[UBS_RSAPRIV_PAR_P]);
2526         padlen = ubsec_ksigbits(&krp->krp_param[UBS_RSAPRIV_PAR_Q]);
2527         if (msglen > padlen)
2528                 padlen = msglen;
2529
2530         if (padlen <= 256)
2531                 padlen = 256;
2532         else if (padlen <= 384)
2533                 padlen = 384;
2534         else if (padlen <= 512)
2535                 padlen = 512;
2536         else if (sc->sc_flags & UBS_FLAGS_BIGKEY && padlen <= 768)
2537                 padlen = 768;
2538         else if (sc->sc_flags & UBS_FLAGS_BIGKEY && padlen <= 1024)
2539                 padlen = 1024;
2540         else {
2541                 err = E2BIG;
2542                 goto errout;
2543         }
2544
2545         if (ubsec_ksigbits(&krp->krp_param[UBS_RSAPRIV_PAR_DP]) > padlen) {
2546                 err = E2BIG;
2547                 goto errout;
2548         }
2549
2550         if (ubsec_ksigbits(&krp->krp_param[UBS_RSAPRIV_PAR_DQ]) > padlen) {
2551                 err = E2BIG;
2552                 goto errout;
2553         }
2554
2555         if (ubsec_ksigbits(&krp->krp_param[UBS_RSAPRIV_PAR_PINV]) > padlen) {
2556                 err = E2BIG;
2557                 goto errout;
2558         }
2559
2560         rp = kmalloc(sizeof *rp, M_DEVBUF, M_INTWAIT | M_ZERO);
2561         rp->rpr_krp = krp;
2562         rp->rpr_q.q_type = UBS_CTXOP_RSAPRIV;
2563
2564         if (ubsec_dma_malloc(sc, sizeof(struct ubsec_mcr),
2565             &rp->rpr_q.q_mcr, 0)) {
2566                 err = ENOMEM;
2567                 goto errout;
2568         }
2569         mcr = (struct ubsec_mcr *)rp->rpr_q.q_mcr.dma_vaddr;
2570
2571         if (ubsec_dma_malloc(sc, sizeof(struct ubsec_ctx_rsapriv),
2572             &rp->rpr_q.q_ctx, 0)) {
2573                 err = ENOMEM;
2574                 goto errout;
2575         }
2576         ctx = (struct ubsec_ctx_rsapriv *)rp->rpr_q.q_ctx.dma_vaddr;
2577         bzero(ctx, sizeof *ctx);
2578
2579         /* Copy in p */
2580         bcopy(krp->krp_param[UBS_RSAPRIV_PAR_P].crp_p,
2581             &ctx->rpr_buf[0 * (padlen / 8)],
2582             (krp->krp_param[UBS_RSAPRIV_PAR_P].crp_nbits + 7) / 8);
2583
2584         /* Copy in q */
2585         bcopy(krp->krp_param[UBS_RSAPRIV_PAR_Q].crp_p,
2586             &ctx->rpr_buf[1 * (padlen / 8)],
2587             (krp->krp_param[UBS_RSAPRIV_PAR_Q].crp_nbits + 7) / 8);
2588
2589         /* Copy in dp */
2590         bcopy(krp->krp_param[UBS_RSAPRIV_PAR_DP].crp_p,
2591             &ctx->rpr_buf[2 * (padlen / 8)],
2592             (krp->krp_param[UBS_RSAPRIV_PAR_DP].crp_nbits + 7) / 8);
2593
2594         /* Copy in dq */
2595         bcopy(krp->krp_param[UBS_RSAPRIV_PAR_DQ].crp_p,
2596             &ctx->rpr_buf[3 * (padlen / 8)],
2597             (krp->krp_param[UBS_RSAPRIV_PAR_DQ].crp_nbits + 7) / 8);
2598
2599         /* Copy in pinv */
2600         bcopy(krp->krp_param[UBS_RSAPRIV_PAR_PINV].crp_p,
2601             &ctx->rpr_buf[4 * (padlen / 8)],
2602             (krp->krp_param[UBS_RSAPRIV_PAR_PINV].crp_nbits + 7) / 8);
2603
2604         msglen = padlen * 2;
2605
2606         /* Copy in input message (aligned buffer/length). */
2607         if (ubsec_ksigbits(&krp->krp_param[UBS_RSAPRIV_PAR_MSGIN]) > msglen) {
2608                 /* Is this likely? */
2609                 err = E2BIG;
2610                 goto errout;
2611         }
2612         if (ubsec_dma_malloc(sc, (msglen + 7) / 8, &rp->rpr_msgin, 0)) {
2613                 err = ENOMEM;
2614                 goto errout;
2615         }
2616         bzero(rp->rpr_msgin.dma_vaddr, (msglen + 7) / 8);
2617         bcopy(krp->krp_param[UBS_RSAPRIV_PAR_MSGIN].crp_p,
2618             rp->rpr_msgin.dma_vaddr,
2619             (krp->krp_param[UBS_RSAPRIV_PAR_MSGIN].crp_nbits + 7) / 8);
2620
2621         /* Prepare space for output message (aligned buffer/length). */
2622         if (ubsec_ksigbits(&krp->krp_param[UBS_RSAPRIV_PAR_MSGOUT]) < msglen) {
2623                 /* Is this likely? */
2624                 err = E2BIG;
2625                 goto errout;
2626         }
2627         if (ubsec_dma_malloc(sc, (msglen + 7) / 8, &rp->rpr_msgout, 0)) {
2628                 err = ENOMEM;
2629                 goto errout;
2630         }
2631         bzero(rp->rpr_msgout.dma_vaddr, (msglen + 7) / 8);
2632
2633         mcr->mcr_pkts = htole16(1);
2634         mcr->mcr_flags = 0;
2635         mcr->mcr_cmdctxp = htole32(rp->rpr_q.q_ctx.dma_paddr);
2636         mcr->mcr_ipktbuf.pb_addr = htole32(rp->rpr_msgin.dma_paddr);
2637         mcr->mcr_ipktbuf.pb_next = 0;
2638         mcr->mcr_ipktbuf.pb_len = htole32(rp->rpr_msgin.dma_size);
2639         mcr->mcr_reserved = 0;
2640         mcr->mcr_pktlen = htole16(msglen);
2641         mcr->mcr_opktbuf.pb_addr = htole32(rp->rpr_msgout.dma_paddr);
2642         mcr->mcr_opktbuf.pb_next = 0;
2643         mcr->mcr_opktbuf.pb_len = htole32(rp->rpr_msgout.dma_size);
2644
2645 #ifdef DIAGNOSTIC
2646         if (rp->rpr_msgin.dma_paddr & 3 || rp->rpr_msgin.dma_size & 3) {
2647                 panic("%s: rsapriv: invalid msgin %x(0x%x)",
2648                     device_get_nameunit(sc->sc_dev),
2649                     rp->rpr_msgin.dma_paddr, rp->rpr_msgin.dma_size);
2650         }
2651         if (rp->rpr_msgout.dma_paddr & 3 || rp->rpr_msgout.dma_size & 3) {
2652                 panic("%s: rsapriv: invalid msgout %x(0x%x)",
2653                     device_get_nameunit(sc->sc_dev),
2654                     rp->rpr_msgout.dma_paddr, rp->rpr_msgout.dma_size);
2655         }
2656 #endif
2657
2658         ctx->rpr_len = (sizeof(u_int16_t) * 4) + (5 * (padlen / 8));
2659         ctx->rpr_op = htole16(UBS_CTXOP_RSAPRIV);
2660         ctx->rpr_q_len = htole16(padlen);
2661         ctx->rpr_p_len = htole16(padlen);
2662
2663         /*
2664          * ubsec_feed2 will sync mcr and ctx, we just need to sync
2665          * everything else.
2666          */
2667         ubsec_dma_sync(&rp->rpr_msgin, BUS_DMASYNC_PREWRITE);
2668         ubsec_dma_sync(&rp->rpr_msgout, BUS_DMASYNC_PREREAD);
2669
2670         /* Enqueue and we're done... */
2671         crit_enter();
2672         SIMPLEQ_INSERT_TAIL(&sc->sc_queue2, &rp->rpr_q, q_next);
2673         ubsec_feed2(sc);
2674         ubsecstats.hst_modexpcrt++;
2675         crit_exit();
2676         return (0);
2677
2678 errout:
2679         if (rp != NULL) {
2680                 if (rp->rpr_q.q_mcr.dma_map != NULL)
2681                         ubsec_dma_free(sc, &rp->rpr_q.q_mcr);
2682                 if (rp->rpr_msgin.dma_map != NULL) {
2683                         bzero(rp->rpr_msgin.dma_vaddr, rp->rpr_msgin.dma_size);
2684                         ubsec_dma_free(sc, &rp->rpr_msgin);
2685                 }
2686                 if (rp->rpr_msgout.dma_map != NULL) {
2687                         bzero(rp->rpr_msgout.dma_vaddr, rp->rpr_msgout.dma_size);
2688                         ubsec_dma_free(sc, &rp->rpr_msgout);
2689                 }
2690                 kfree(rp, M_DEVBUF);
2691         }
2692         krp->krp_status = err;
2693         crypto_kdone(krp);
2694         return (0);
2695 }
2696
2697 #ifdef UBSEC_DEBUG
2698 static void
2699 ubsec_dump_pb(volatile struct ubsec_pktbuf *pb)
2700 {
2701         kprintf("addr 0x%x (0x%x) next 0x%x\n",
2702             pb->pb_addr, pb->pb_len, pb->pb_next);
2703 }
2704
2705 static void
2706 ubsec_dump_ctx2(struct ubsec_ctx_keyop *c)
2707 {
2708         kprintf("CTX (0x%x):\n", c->ctx_len);
2709         switch (letoh16(c->ctx_op)) {
2710         case UBS_CTXOP_RNGBYPASS:
2711         case UBS_CTXOP_RNGSHA1:
2712                 break;
2713         case UBS_CTXOP_MODEXP:
2714         {
2715                 struct ubsec_ctx_modexp *cx = (void *)c;
2716                 int i, len;
2717
2718                 kprintf(" Elen %u, Nlen %u\n",
2719                     letoh16(cx->me_E_len), letoh16(cx->me_N_len));
2720                 len = (cx->me_N_len + 7)/8;
2721                 for (i = 0; i < len; i++)
2722                         kprintf("%s%02x", (i == 0) ? " N: " : ":", cx->me_N[i]);
2723                 kprintf("\n");
2724                 break;
2725         }
2726         default:
2727                 kprintf("unknown context: %x\n", c->ctx_op);
2728         }
2729         kprintf("END CTX\n");
2730 }
2731
2732 static void
2733 ubsec_dump_mcr(struct ubsec_mcr *mcr)
2734 {
2735         volatile struct ubsec_mcr_add *ma;
2736         int i;
2737
2738         kprintf("MCR:\n");
2739         kprintf(" pkts: %u, flags 0x%x\n",
2740             letoh16(mcr->mcr_pkts), letoh16(mcr->mcr_flags));
2741         ma = (volatile struct ubsec_mcr_add *)&mcr->mcr_cmdctxp;
2742         for (i = 0; i < letoh16(mcr->mcr_pkts); i++) {
2743                 kprintf(" %d: ctx 0x%x len 0x%x rsvd 0x%x\n", i,
2744                     letoh32(ma->mcr_cmdctxp), letoh16(ma->mcr_pktlen),
2745                     letoh16(ma->mcr_reserved));
2746                 kprintf(" %d: ipkt ", i);
2747                 ubsec_dump_pb(&ma->mcr_ipktbuf);
2748                 kprintf(" %d: opkt ", i);
2749                 ubsec_dump_pb(&ma->mcr_opktbuf);
2750                 ma++;
2751         }
2752         kprintf("END MCR\n");
2753 }
2754 #endif /* UBSEC_DEBUG */
2755
2756 /*
2757  * Return the number of significant bits of a big number.
2758  */
2759 static int
2760 ubsec_ksigbits(struct crparam *cr)
2761 {
2762         u_int plen = (cr->crp_nbits + 7) / 8;
2763         int i, sig = plen * 8;
2764         u_int8_t c, *p = cr->crp_p;
2765
2766         for (i = plen - 1; i >= 0; i--) {
2767                 c = p[i];
2768                 if (c != 0) {
2769                         while ((c & 0x80) == 0) {
2770                                 sig--;
2771                                 c <<= 1;
2772                         }
2773                         break;
2774                 }
2775                 sig -= 8;
2776         }
2777         return (sig);
2778 }
2779
2780 static void
2781 ubsec_kshift_r(
2782         u_int shiftbits,
2783         u_int8_t *src, u_int srcbits,
2784         u_int8_t *dst, u_int dstbits)
2785 {
2786         u_int slen, dlen;
2787         int i, si, di, n;
2788
2789         slen = (srcbits + 7) / 8;
2790         dlen = (dstbits + 7) / 8;
2791
2792         for (i = 0; i < slen; i++)
2793                 dst[i] = src[i];
2794         for (i = 0; i < dlen - slen; i++)
2795                 dst[slen + i] = 0;
2796
2797         n = shiftbits / 8;
2798         if (n != 0) {
2799                 si = dlen - n - 1;
2800                 di = dlen - 1;
2801                 while (si >= 0)
2802                         dst[di--] = dst[si--];
2803                 while (di >= 0)
2804                         dst[di--] = 0;
2805         }
2806
2807         n = shiftbits % 8;
2808         if (n != 0) {
2809                 for (i = dlen - 1; i > 0; i--)
2810                         dst[i] = (dst[i] << n) |
2811                             (dst[i - 1] >> (8 - n));
2812                 dst[0] = dst[0] << n;
2813         }
2814 }
2815
2816 static void
2817 ubsec_kshift_l(
2818         u_int shiftbits,
2819         u_int8_t *src, u_int srcbits,
2820         u_int8_t *dst, u_int dstbits)
2821 {
2822         int slen, dlen, i, n;
2823
2824         slen = (srcbits + 7) / 8;
2825         dlen = (dstbits + 7) / 8;
2826
2827         n = shiftbits / 8;
2828         for (i = 0; i < slen; i++)
2829                 dst[i] = src[i + n];
2830         for (i = 0; i < dlen - slen; i++)
2831                 dst[slen + i] = 0;
2832
2833         n = shiftbits % 8;
2834         if (n != 0) {
2835                 for (i = 0; i < (dlen - 1); i++)
2836                         dst[i] = (dst[i] >> n) | (dst[i + 1] << (8 - n));
2837                 dst[dlen - 1] = dst[dlen - 1] >> n;
2838         }
2839 }