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glxsb/nsclpcsio - cleanup
[dragonfly.git] / sys / dev / crypto / glxsb / glxsb.c
CommitLineData
c8ee5416
AH		 1/* $OpenBSD: glxsb.c,v 1.7 2007/02/12 14:31:45 tom Exp $ */
2
3/*
4 * Copyright (c) 2006 Tom Cosgrove <tom@openbsd.org>
5 * Copyright (c) 2003, 2004 Theo de Raadt
6 * Copyright (c) 2003 Jason Wright
7 *
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 */
20
21/*
22 * Driver for the security block on the AMD Geode LX processors
23 * http://www.amd.com/files/connectivitysolutions/geode/geode_lx/33234d_lx_ds.pdf
24 */
25
26#include <sys/cdefs.h>
c8ee5416
AH		 27
28#include <sys/param.h>
29#include <sys/systm.h>
30#include <sys/bus.h>
31#include <sys/errno.h>
32#include <sys/kernel.h>
33#include <sys/lock.h>
34#include <sys/malloc.h>
35#include <sys/mbuf.h>
36#include <sys/module.h>
f0dfb0dc 37#include <sys/spinlock2.h>
c8ee5416
AH		 38#include <sys/proc.h>
39#include <sys/random.h>
40#include <sys/rman.h>
c8ee5416
AH		 41#include <sys/sysctl.h>
42#include <sys/taskqueue.h>
43
f0dfb0dc
AH		 44#include <sys/bus.h>
45#include <sys/bus_dma.h>
c8ee5416 46#include <machine/cpufunc.h>
f0dfb0dc 47#include <sys/resource.h>
c8ee5416 48
f0dfb0dc
AH		 49#include <bus/pci/pcivar.h>
50#include <bus/pci/pcireg.h>
c8ee5416
AH		 51
52#include <opencrypto/cryptodev.h>
53#include <opencrypto/cryptosoft.h>
54#include <opencrypto/xform.h>
55
56#include "cryptodev_if.h"
57#include "glxsb.h"
58
59#define PCI_VENDOR_AMD 0x1022 /* AMD */
60#define PCI_PRODUCT_AMD_GEODE_LX_CRYPTO 0x2082 /* Geode LX Crypto */
61
62#define SB_GLD_MSR_CAP 0x58002000 /* RO - Capabilities */
63#define SB_GLD_MSR_CONFIG 0x58002001 /* RW - Master Config */
64#define SB_GLD_MSR_SMI 0x58002002 /* RW - SMI */
65#define SB_GLD_MSR_ERROR 0x58002003 /* RW - Error */
66#define SB_GLD_MSR_PM 0x58002004 /* RW - Power Mgmt */
67#define SB_GLD_MSR_DIAG 0x58002005 /* RW - Diagnostic */
68#define SB_GLD_MSR_CTRL 0x58002006 /* RW - Security Block Cntrl */
69
70 /* For GLD_MSR_CTRL: */
71#define SB_GMC_DIV0 0x0000 /* AES update divisor values */
72#define SB_GMC_DIV1 0x0001
73#define SB_GMC_DIV2 0x0002
74#define SB_GMC_DIV3 0x0003
75#define SB_GMC_DIV_MASK 0x0003
76#define SB_GMC_SBI 0x0004 /* AES swap bits */
77#define SB_GMC_SBY 0x0008 /* AES swap bytes */
78#define SB_GMC_TW 0x0010 /* Time write (EEPROM) */
79#define SB_GMC_T_SEL0 0x0000 /* RNG post-proc: none */
80#define SB_GMC_T_SEL1 0x0100 /* RNG post-proc: LFSR */
81#define SB_GMC_T_SEL2 0x0200 /* RNG post-proc: whitener */
82#define SB_GMC_T_SEL3 0x0300 /* RNG LFSR+whitener */
83#define SB_GMC_T_SEL_MASK 0x0300
84#define SB_GMC_T_NE 0x0400 /* Noise (generator) Enable */
85#define SB_GMC_T_TM 0x0800 /* RNG test mode */
86 /* (deterministic) */
87
88/* Security Block configuration/control registers (offsets from base) */
89#define SB_CTL_A 0x0000 /* RW - SB Control A */
90#define SB_CTL_B 0x0004 /* RW - SB Control B */
91#define SB_AES_INT 0x0008 /* RW - SB AES Interrupt */
92#define SB_SOURCE_A 0x0010 /* RW - Source A */
93#define SB_DEST_A 0x0014 /* RW - Destination A */
94#define SB_LENGTH_A 0x0018 /* RW - Length A */
95#define SB_SOURCE_B 0x0020 /* RW - Source B */
96#define SB_DEST_B 0x0024 /* RW - Destination B */
97#define SB_LENGTH_B 0x0028 /* RW - Length B */
98#define SB_WKEY 0x0030 /* WO - Writable Key 0-3 */
99#define SB_WKEY_0 0x0030 /* WO - Writable Key 0 */
100#define SB_WKEY_1 0x0034 /* WO - Writable Key 1 */
101#define SB_WKEY_2 0x0038 /* WO - Writable Key 2 */
102#define SB_WKEY_3 0x003C /* WO - Writable Key 3 */
103#define SB_CBC_IV 0x0040 /* RW - CBC IV 0-3 */
104#define SB_CBC_IV_0 0x0040 /* RW - CBC IV 0 */
105#define SB_CBC_IV_1 0x0044 /* RW - CBC IV 1 */
106#define SB_CBC_IV_2 0x0048 /* RW - CBC IV 2 */
107#define SB_CBC_IV_3 0x004C /* RW - CBC IV 3 */
108#define SB_RANDOM_NUM 0x0050 /* RW - Random Number */
109#define SB_RANDOM_NUM_STATUS 0x0054 /* RW - Random Number Status */
110#define SB_EEPROM_COMM 0x0800 /* RW - EEPROM Command */
111#define SB_EEPROM_ADDR 0x0804 /* RW - EEPROM Address */
112#define SB_EEPROM_DATA 0x0808 /* RW - EEPROM Data */
113#define SB_EEPROM_SEC_STATE 0x080C /* RW - EEPROM Security State */
114
115 /* For SB_CTL_A and _B */
116#define SB_CTL_ST 0x0001 /* Start operation (enc/dec) */
117#define SB_CTL_ENC 0x0002 /* Encrypt (0 is decrypt) */
118#define SB_CTL_DEC 0x0000 /* Decrypt */
119#define SB_CTL_WK 0x0004 /* Use writable key (we set) */
120#define SB_CTL_DC 0x0008 /* Destination coherent */
121#define SB_CTL_SC 0x0010 /* Source coherent */
122#define SB_CTL_CBC 0x0020 /* CBC (0 is ECB) */
123
124 /* For SB_AES_INT */
125#define SB_AI_DISABLE_AES_A 0x0001 /* Disable AES A compl int */
126#define SB_AI_ENABLE_AES_A 0x0000 /* Enable AES A compl int */
127#define SB_AI_DISABLE_AES_B 0x0002 /* Disable AES B compl int */
128#define SB_AI_ENABLE_AES_B 0x0000 /* Enable AES B compl int */
129#define SB_AI_DISABLE_EEPROM 0x0004 /* Disable EEPROM op comp int */
130#define SB_AI_ENABLE_EEPROM 0x0000 /* Enable EEPROM op compl int */
131#define SB_AI_AES_A_COMPLETE 0x10000 /* AES A operation complete */
132#define SB_AI_AES_B_COMPLETE 0x20000 /* AES B operation complete */
133#define SB_AI_EEPROM_COMPLETE 0x40000 /* EEPROM operation complete */
134
135#define SB_AI_CLEAR_INTR \
136 (SB_AI_DISABLE_AES_A | SB_AI_DISABLE_AES_B |\
137 SB_AI_DISABLE_EEPROM | SB_AI_AES_A_COMPLETE |\
138 SB_AI_AES_B_COMPLETE | SB_AI_EEPROM_COMPLETE)
139
140#define SB_RNS_TRNG_VALID 0x0001 /* in SB_RANDOM_NUM_STATUS */
141
142#define SB_MEM_SIZE 0x0810 /* Size of memory block */
143
144#define SB_AES_ALIGN 0x0010 /* Source and dest buffers */
145 /* must be 16-byte aligned */
146#define SB_AES_BLOCK_SIZE 0x0010
147
148/*
149 * The Geode LX security block AES acceleration doesn't perform scatter-
150 * gather: it just takes source and destination addresses. Therefore the
151 * plain- and ciphertexts need to be contiguous. To this end, we allocate
152 * a buffer for both, and accept the overhead of copying in and out. If
153 * the number of bytes in one operation is bigger than allowed for by the
154 * buffer (buffer is twice the size of the max length, as it has both input
155 * and output) then we have to perform multiple encryptions/decryptions.
156 */
157
158#define GLXSB_MAX_AES_LEN 16384
159
160MALLOC_DEFINE(M_GLXSB, "glxsb_data", "Glxsb Data");
161
162struct glxsb_dma_map {
163 bus_dmamap_t dma_map; /* DMA map */
164 bus_dma_segment_t dma_seg; /* segments */
165 int dma_nsegs; /* #segments */
166 int dma_size; /* size */
167 caddr_t dma_vaddr; /* virtual address */
168 bus_addr_t dma_paddr; /* physical address */
169};
170
171struct glxsb_taskop {
172 struct glxsb_session *to_ses; /* crypto session */
173 struct cryptop *to_crp; /* cryptop to perfom */
174 struct cryptodesc *to_enccrd; /* enccrd to perform */
175 struct cryptodesc *to_maccrd; /* maccrd to perform */
176};
177
178struct glxsb_softc {
179 device_t sc_dev; /* device backpointer */
180 struct resource *sc_sr; /* resource */
181 int sc_rid; /* resource rid */
182 struct callout sc_rngco; /* RNG callout */
183 int sc_rnghz; /* RNG callout ticks */
184 bus_dma_tag_t sc_dmat; /* DMA tag */
185 struct glxsb_dma_map sc_dma; /* DMA map */
186 int32_t sc_cid; /* crypto tag */
187 uint32_t sc_sid; /* session id */
188 TAILQ_HEAD(ses_head, glxsb_session)
189 sc_sessions; /* crypto sessions */
f0dfb0dc
AH		 190 struct spinlock sc_sessions_lock;/* sessions lock */
191 struct spinlock sc_task_mtx; /* task mutex */
c8ee5416
AH		 192 struct taskqueue *sc_tq; /* task queue */
193 struct task sc_cryptotask; /* task */
194 struct glxsb_taskop sc_to; /* task's crypto operation */
195 int sc_task_count; /* tasks count */
196};
197
198static int glxsb_probe(device_t);
199static int glxsb_attach(device_t);
200static int glxsb_detach(device_t);
201
202static void glxsb_dmamap_cb(void *, bus_dma_segment_t *, int, int);
203static int glxsb_dma_alloc(struct glxsb_softc *);
204static void glxsb_dma_pre_op(struct glxsb_softc *, struct glxsb_dma_map *);
205static void glxsb_dma_post_op(struct glxsb_softc *, struct glxsb_dma_map *);
206static void glxsb_dma_free(struct glxsb_softc *, struct glxsb_dma_map *);
207
208static void glxsb_rnd(void *);
209static int glxsb_crypto_setup(struct glxsb_softc *);
210static int glxsb_crypto_newsession(device_t, uint32_t *, struct cryptoini *);
211static int glxsb_crypto_freesession(device_t, uint64_t);
212static int glxsb_aes(struct glxsb_softc *, uint32_t, uint32_t,
213 uint32_t, void *, int, void *);
214
215static int glxsb_crypto_encdec(struct cryptop *, struct cryptodesc *,
216 struct glxsb_session *, struct glxsb_softc *);
217
218static void glxsb_crypto_task(void *, int);
219static int glxsb_crypto_process(device_t, struct cryptop *, int);
220
221static device_method_t glxsb_methods[] = {
222 /* device interface */
223 DEVMETHOD(device_probe, glxsb_probe),
224 DEVMETHOD(device_attach, glxsb_attach),
225 DEVMETHOD(device_detach, glxsb_detach),
226
227 /* crypto device methods */
228 DEVMETHOD(cryptodev_newsession, glxsb_crypto_newsession),
229 DEVMETHOD(cryptodev_freesession, glxsb_crypto_freesession),
230 DEVMETHOD(cryptodev_process, glxsb_crypto_process),
231
232 {0,0}
233};
234
235static driver_t glxsb_driver = {
236 "glxsb",
237 glxsb_methods,
238 sizeof(struct glxsb_softc)
239};
240
241static devclass_t glxsb_devclass;
242
243DRIVER_MODULE(glxsb, pci, glxsb_driver, glxsb_devclass, 0, 0);
244MODULE_VERSION(glxsb, 1);
245MODULE_DEPEND(glxsb, crypto, 1, 1, 1);
246
247static int
248glxsb_probe(device_t dev)
249{
250
251 if (pci_get_vendor(dev) == PCI_VENDOR_AMD &&
252 pci_get_device(dev) == PCI_PRODUCT_AMD_GEODE_LX_CRYPTO) {
253 device_set_desc(dev,
254 "AMD Geode LX Security Block (AES-128-CBC, RNG)");
255 return (BUS_PROBE_DEFAULT);
256 }
257
258 return (ENXIO);
259}
260
261static int
262glxsb_attach(device_t dev)
263{
264 struct glxsb_softc *sc = device_get_softc(dev);
265 uint64_t msr;
266
267 sc->sc_dev = dev;
268 msr = rdmsr(SB_GLD_MSR_CAP);
269
270 if ((msr & 0xFFFF00) != 0x130400) {
271 device_printf(dev, "unknown ID 0x%x\n",
272 (int)((msr & 0xFFFF00) >> 16));
273 return (ENXIO);
274 }
275
276 pci_enable_busmaster(dev);
277
278 /* Map in the security block configuration/control registers */
279 sc->sc_rid = PCIR_BAR(0);
280 sc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->sc_rid,
281 RF_ACTIVE);
282 if (sc->sc_sr == NULL) {
283 device_printf(dev, "cannot map register space\n");
284 return (ENXIO);
285 }
286
287 /*
288 * Configure the Security Block.
289 *
290 * We want to enable the noise generator (T_NE), and enable the
291 * linear feedback shift register and whitener post-processing
292 * (T_SEL = 3). Also ensure that test mode (deterministic values)
293 * is disabled.
294 */
295 msr = rdmsr(SB_GLD_MSR_CTRL);
296 msr &= ~(SB_GMC_T_TM | SB_GMC_T_SEL_MASK);
297 msr |= SB_GMC_T_NE | SB_GMC_T_SEL3;
298#if 0
299 msr |= SB_GMC_SBI | SB_GMC_SBY; /* for AES, if necessary */
300#endif
301 wrmsr(SB_GLD_MSR_CTRL, msr);
302
303 /* Disable interrupts */
304 bus_write_4(sc->sc_sr, SB_AES_INT, SB_AI_CLEAR_INTR);
305
306 /* Allocate a contiguous DMA-able buffer to work in */
307 if (glxsb_dma_alloc(sc) != 0)
308 goto fail0;
309
f0dfb0dc
AH		 310
311 /* XXX: thread taskqueues ? */
c8ee5416
AH		 312 /* Initialize our task queue */
313 sc->sc_tq = taskqueue_create("glxsb_taskq", M_NOWAIT | M_ZERO,
314 taskqueue_thread_enqueue, &sc->sc_tq);
315 if (sc->sc_tq == NULL) {
316 device_printf(dev, "cannot create task queue\n");
317 goto fail0;
318 }
ad74c20a
AH		 319 if (taskqueue_start_threads(&sc->sc_tq, 1, TDPRI_KERN_DAEMON, -1,
320 "%s taskq", device_get_nameunit(dev)) != 0) {
c8ee5416
AH		 321 device_printf(dev, "cannot start task queue\n");
322 goto fail1;
323 }
f0dfb0dc 324
c8ee5416
AH		 325 TASK_INIT(&sc->sc_cryptotask, 0, glxsb_crypto_task, sc);
326
327 /* Initialize crypto */
328 if (glxsb_crypto_setup(sc) != 0)
329 goto fail1;
330
331 /* Install a periodic collector for the "true" (AMD's word) RNG */
332 if (hz > 100)
333 sc->sc_rnghz = hz / 100;
334 else
335 sc->sc_rnghz = 1;
f0dfb0dc 336 callout_init_mp(&sc->sc_rngco);
c8ee5416
AH		 337 glxsb_rnd(sc);
338
339 return (0);
340
341fail1:
f0dfb0dc
AH		 342
343 /* XXX: thread taskqueues ? */
c8ee5416 344 taskqueue_free(sc->sc_tq);
f0dfb0dc 345
c8ee5416
AH		 346fail0:
347 bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_rid, sc->sc_sr);
348 return (ENXIO);
349}
350
351static int
352glxsb_detach(device_t dev)
353{
354 struct glxsb_softc *sc = device_get_softc(dev);
355 struct glxsb_session *ses;
356
f0dfb0dc 357 spin_lock_wr(&sc->sc_sessions_lock);
c8ee5416
AH		 358 TAILQ_FOREACH(ses, &sc->sc_sessions, ses_next) {
359 if (ses->ses_used) {
f0dfb0dc 360 spin_unlock_wr(&sc->sc_sessions_lock);
c8ee5416
AH		 361 device_printf(dev,
362 "cannot detach, sessions still active.\n");
363 return (EBUSY);
364 }
365 }
366 while (!TAILQ_EMPTY(&sc->sc_sessions)) {
367 ses = TAILQ_FIRST(&sc->sc_sessions);
368 TAILQ_REMOVE(&sc->sc_sessions, ses, ses_next);
f0dfb0dc 369 kfree(ses, M_GLXSB);
c8ee5416 370 }
f0dfb0dc 371 spin_unlock_wr(&sc->sc_sessions_lock);
c8ee5416 372 crypto_unregister_all(sc->sc_cid);
f0dfb0dc
AH		 373#if 0
374 /* XXX: need implementation of callout_drain or workaround */
c8ee5416 375 callout_drain(&sc->sc_rngco);
f0dfb0dc
AH		 376#endif
377
378 /* XXX: thread taskqueues ? */
379 /* XXX: need implementation of taskqueue_drain or workaround */
c8ee5416 380 taskqueue_drain(sc->sc_tq, &sc->sc_cryptotask);
f0dfb0dc 381
c8ee5416
AH		 382 bus_generic_detach(dev);
383 glxsb_dma_free(sc, &sc->sc_dma);
384 bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_rid, sc->sc_sr);
f0dfb0dc
AH		 385
386 /* XXX: thread taskqueues ? */
c8ee5416 387 taskqueue_free(sc->sc_tq);
f0dfb0dc
AH		 388
389 spin_uninit(&sc->sc_sessions_lock);
390 spin_uninit(&sc->sc_task_mtx);
c8ee5416
AH		 391 return (0);
392}
393
394/*
395 * callback for bus_dmamap_load()
396 */
397static void
398glxsb_dmamap_cb(void *arg, bus_dma_segment_t *seg, int nseg, int error)
399{
400
401 bus_addr_t *paddr = (bus_addr_t*) arg;
402 *paddr = seg[0].ds_addr;
403}
404
405static int
406glxsb_dma_alloc(struct glxsb_softc *sc)
407{
408 struct glxsb_dma_map *dma = &sc->sc_dma;
409 int rc;
410
411 dma->dma_nsegs = 1;
412 dma->dma_size = GLXSB_MAX_AES_LEN * 2;
413
414 /* Setup DMA descriptor area */
415 rc = bus_dma_tag_create(NULL, /* parent */
416 SB_AES_ALIGN, 0, /* alignments, bounds */
417 BUS_SPACE_MAXADDR_32BIT,/* lowaddr */
418 BUS_SPACE_MAXADDR, /* highaddr */
419 NULL, NULL, /* filter, filterarg */
420 dma->dma_size, /* maxsize */
421 dma->dma_nsegs, /* nsegments */
422 dma->dma_size, /* maxsegsize */
423 BUS_DMA_ALLOCNOW, /* flags */
c8ee5416
AH		 424 &sc->sc_dmat);
425 if (rc != 0) {
426 device_printf(sc->sc_dev,
427 "cannot allocate DMA tag (%d)\n", rc);
428 return (rc);
429 }
430
431 rc = bus_dmamem_alloc(sc->sc_dmat, (void **)&dma->dma_vaddr,
432 BUS_DMA_NOWAIT, &dma->dma_map);
433 if (rc != 0) {
434 device_printf(sc->sc_dev,
435 "cannot allocate DMA memory of %d bytes (%d)\n",
436 dma->dma_size, rc);
437 goto fail0;
438 }
439
440 rc = bus_dmamap_load(sc->sc_dmat, dma->dma_map, dma->dma_vaddr,
441 dma->dma_size, glxsb_dmamap_cb, &dma->dma_paddr, BUS_DMA_NOWAIT);
442 if (rc != 0) {
443 device_printf(sc->sc_dev,
444 "cannot load DMA memory for %d bytes (%d)\n",
445 dma->dma_size, rc);
446 goto fail1;
447 }
448
449 return (0);
450
451fail1:
452 bus_dmamem_free(sc->sc_dmat, dma->dma_vaddr, dma->dma_map);
453fail0:
454 bus_dma_tag_destroy(sc->sc_dmat);
455 return (rc);
456}
457
458static void
459glxsb_dma_pre_op(struct glxsb_softc *sc, struct glxsb_dma_map *dma)
460{
461
462 bus_dmamap_sync(sc->sc_dmat, dma->dma_map,
463 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
464}
465
466static void
467glxsb_dma_post_op(struct glxsb_softc *sc, struct glxsb_dma_map *dma)
468{
469
470 bus_dmamap_sync(sc->sc_dmat, dma->dma_map,
471 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
472}
473
474static void
475glxsb_dma_free(struct glxsb_softc *sc, struct glxsb_dma_map *dma)
476{
477
478 bus_dmamap_unload(sc->sc_dmat, dma->dma_map);
479 bus_dmamem_free(sc->sc_dmat, dma->dma_vaddr, dma->dma_map);
480 bus_dma_tag_destroy(sc->sc_dmat);
481}
482
483static void
484glxsb_rnd(void *v)
485{
486 struct glxsb_softc *sc = v;
f0dfb0dc
AH		 487 uint32_t status;
488 int32_t value;
c8ee5416
AH		 489
490 status = bus_read_4(sc->sc_sr, SB_RANDOM_NUM_STATUS);
491 if (status & SB_RNS_TRNG_VALID) {
492 value = bus_read_4(sc->sc_sr, SB_RANDOM_NUM);
493 /* feed with one uint32 */
f0dfb0dc 494 add_true_randomness(value);
c8ee5416
AH		 495 }
496
497 callout_reset(&sc->sc_rngco, sc->sc_rnghz, glxsb_rnd, sc);
498}
499
500static int
501glxsb_crypto_setup(struct glxsb_softc *sc)
502{
503
504 sc->sc_cid = crypto_get_driverid(sc->sc_dev, CRYPTOCAP_F_HARDWARE);
505
506 if (sc->sc_cid < 0) {
507 device_printf(sc->sc_dev, "cannot get crypto driver id\n");
508 return (ENOMEM);
509 }
510
511 TAILQ_INIT(&sc->sc_sessions);
512 sc->sc_sid = 1;
f0dfb0dc
AH		 513 spin_init(&sc->sc_sessions_lock);
514 spin_init(&sc->sc_task_mtx);
c8ee5416
AH		 515
516 if (crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0) != 0)
517 goto crypto_fail;
518 if (crypto_register(sc->sc_cid, CRYPTO_NULL_HMAC, 0, 0) != 0)
519 goto crypto_fail;
520 if (crypto_register(sc->sc_cid, CRYPTO_MD5_HMAC, 0, 0) != 0)
521 goto crypto_fail;
522 if (crypto_register(sc->sc_cid, CRYPTO_SHA1_HMAC, 0, 0) != 0)
523 goto crypto_fail;
524 if (crypto_register(sc->sc_cid, CRYPTO_RIPEMD160_HMAC, 0, 0) != 0)
525 goto crypto_fail;
526 if (crypto_register(sc->sc_cid, CRYPTO_SHA2_256_HMAC, 0, 0) != 0)
527 goto crypto_fail;
528 if (crypto_register(sc->sc_cid, CRYPTO_SHA2_384_HMAC, 0, 0) != 0)
529 goto crypto_fail;
530 if (crypto_register(sc->sc_cid, CRYPTO_SHA2_512_HMAC, 0, 0) != 0)
531 goto crypto_fail;
532
533 return (0);
534
535crypto_fail:
536 device_printf(sc->sc_dev, "cannot register crypto\n");
537 crypto_unregister_all(sc->sc_cid);
f0dfb0dc
AH		 538 spin_uninit(&sc->sc_sessions_lock);
539 spin_uninit(&sc->sc_task_mtx);
c8ee5416
AH		 540 return (ENOMEM);
541}
542
543static int
544glxsb_crypto_newsession(device_t dev, uint32_t *sidp, struct cryptoini *cri)
545{
546 struct glxsb_softc *sc = device_get_softc(dev);
547 struct glxsb_session *ses = NULL;
548 struct cryptoini *encini, *macini;
549 int error;
550
551 if (sc == NULL || sidp == NULL || cri == NULL)
552 return (EINVAL);
553
554 encini = macini = NULL;
555 for (; cri != NULL; cri = cri->cri_next) {
556 switch(cri->cri_alg) {
557 case CRYPTO_NULL_HMAC:
558 case CRYPTO_MD5_HMAC:
559 case CRYPTO_SHA1_HMAC:
560 case CRYPTO_RIPEMD160_HMAC:
561 case CRYPTO_SHA2_256_HMAC:
562 case CRYPTO_SHA2_384_HMAC:
563 case CRYPTO_SHA2_512_HMAC:
564 if (macini != NULL)
565 return (EINVAL);
566 macini = cri;
567 break;
568 case CRYPTO_AES_CBC:
569 if (encini != NULL)
570 return (EINVAL);
571 encini = cri;
572 break;
573 default:
574 return (EINVAL);
575 }
576 }
577
578 /*
579 * We only support HMAC algorithms to be able to work with
580 * ipsec(4), so if we are asked only for authentication without
581 * encryption, don't pretend we can accellerate it.
582 */
583 if (encini == NULL)
584 return (EINVAL);
585
586 /*
587 * Look for a free session
588 *
589 * Free sessions goes first, so if first session is used, we need to
590 * allocate one.
591 */
592
f0dfb0dc 593 spin_lock_wr(&sc->sc_sessions_lock);
c8ee5416
AH		 594 ses = TAILQ_FIRST(&sc->sc_sessions);
595 if (ses == NULL || ses->ses_used) {
f0dfb0dc 596 ses = kmalloc(sizeof(*ses), M_GLXSB, M_NOWAIT | M_ZERO);
c8ee5416 597 if (ses == NULL) {
f0dfb0dc 598 spin_unlock_wr(&sc->sc_sessions_lock);
c8ee5416
AH		 599 return (ENOMEM);
600 }
601 ses->ses_id = sc->sc_sid++;
602 } else {
603 TAILQ_REMOVE(&sc->sc_sessions, ses, ses_next);
604 }
605 ses->ses_used = 1;
606 TAILQ_INSERT_TAIL(&sc->sc_sessions, ses, ses_next);
f0dfb0dc 607 spin_unlock_wr(&sc->sc_sessions_lock);
c8ee5416
AH		 608
609 if (encini->cri_alg == CRYPTO_AES_CBC) {
610 if (encini->cri_klen != 128) {
611 glxsb_crypto_freesession(sc->sc_dev, ses->ses_id);
612 return (EINVAL);
613 }
f0dfb0dc
AH		 614
615 karc4rand(ses->ses_iv, sizeof(ses->ses_iv));
c8ee5416
AH		 616 ses->ses_klen = encini->cri_klen;
617
618 /* Copy the key (Geode LX wants the primary key only) */
619 bcopy(encini->cri_key, ses->ses_key, sizeof(ses->ses_key));
620 }
621
622 if (macini != NULL) {
623 error = glxsb_hash_setup(ses, macini);
624 if (error != 0) {
625 glxsb_crypto_freesession(sc->sc_dev, ses->ses_id);
626 return (error);
627 }
628 }
629
630 *sidp = ses->ses_id;
631 return (0);
632}
633
634static int
635glxsb_crypto_freesession(device_t dev, uint64_t tid)
636{
637 struct glxsb_softc *sc = device_get_softc(dev);
638 struct glxsb_session *ses = NULL;
639 uint32_t sid = ((uint32_t)tid) & 0xffffffff;
640
641 if (sc == NULL)
642 return (EINVAL);
643
f0dfb0dc 644 spin_lock_wr(&sc->sc_sessions_lock);
c8ee5416
AH		 645 TAILQ_FOREACH_REVERSE(ses, &sc->sc_sessions, ses_head, ses_next) {
646 if (ses->ses_id == sid)
647 break;
648 }
649 if (ses == NULL) {
f0dfb0dc 650 spin_unlock_wr(&sc->sc_sessions_lock);
c8ee5416
AH		 651 return (EINVAL);
652 }
653 TAILQ_REMOVE(&sc->sc_sessions, ses, ses_next);
654 glxsb_hash_free(ses);
655 bzero(ses, sizeof(*ses));
656 ses->ses_used = 0;
657 ses->ses_id = sid;
658 TAILQ_INSERT_HEAD(&sc->sc_sessions, ses, ses_next);
f0dfb0dc 659 spin_unlock_wr(&sc->sc_sessions_lock);
c8ee5416
AH		 660
661 return (0);
662}
663
664static int
665glxsb_aes(struct glxsb_softc *sc, uint32_t control, uint32_t psrc,
666 uint32_t pdst, void *key, int len, void *iv)
667{
668 uint32_t status;
669 int i;
670
671 if (len & 0xF) {
672 device_printf(sc->sc_dev,
673 "len must be a multiple of 16 (not %d)\n", len);
674 return (EINVAL);
675 }
676
677 /* Set the source */
678 bus_write_4(sc->sc_sr, SB_SOURCE_A, psrc);
679
680 /* Set the destination address */
681 bus_write_4(sc->sc_sr, SB_DEST_A, pdst);
682
683 /* Set the data length */
684 bus_write_4(sc->sc_sr, SB_LENGTH_A, len);
685
686 /* Set the IV */
687 if (iv != NULL) {
688 bus_write_region_4(sc->sc_sr, SB_CBC_IV, iv, 4);
689 control |= SB_CTL_CBC;
690 }
691
692 /* Set the key */
693 bus_write_region_4(sc->sc_sr, SB_WKEY, key, 4);
694
695 /* Ask the security block to do it */
696 bus_write_4(sc->sc_sr, SB_CTL_A,
697 control | SB_CTL_WK | SB_CTL_DC | SB_CTL_SC | SB_CTL_ST);
698
699 /*
700 * Now wait until it is done.
701 *
702 * We do a busy wait. Obviously the number of iterations of
703 * the loop required to perform the AES operation depends upon
704 * the number of bytes to process.
705 *
706 * On a 500 MHz Geode LX we see
707 *
708 * length (bytes) typical max iterations
709 * 16 12
710 * 64 22
711 * 256 59
712 * 1024 212
713 * 8192 1,537
714 *
715 * Since we have a maximum size of operation defined in
716 * GLXSB_MAX_AES_LEN, we use this constant to decide how long
717 * to wait. Allow an order of magnitude longer than it should
718 * really take, just in case.
719 */
720
721 for (i = 0; i < GLXSB_MAX_AES_LEN * 10; i++) {
722 status = bus_read_4(sc->sc_sr, SB_CTL_A);
723 if ((status & SB_CTL_ST) == 0) /* Done */
724 return (0);
725 }
726
727 device_printf(sc->sc_dev, "operation failed to complete\n");
728 return (EIO);
729}
730
731static int
732glxsb_crypto_encdec(struct cryptop *crp, struct cryptodesc *crd,
733 struct glxsb_session *ses, struct glxsb_softc *sc)
734{
735 char *op_src, *op_dst;
736 uint32_t op_psrc, op_pdst;
737 uint8_t op_iv[SB_AES_BLOCK_SIZE], *piv;
738 int error;
739 int len, tlen, xlen;
740 int offset;
741 uint32_t control;
742
743 if (crd == NULL || (crd->crd_len % SB_AES_BLOCK_SIZE) != 0)
744 return (EINVAL);
745
746 /* How much of our buffer will we need to use? */
747 xlen = crd->crd_len > GLXSB_MAX_AES_LEN ?
748 GLXSB_MAX_AES_LEN : crd->crd_len;
749
750 /*
751 * XXX Check if we can have input == output on Geode LX.
752 * XXX In the meantime, use two separate (adjacent) buffers.
753 */
754 op_src = sc->sc_dma.dma_vaddr;
755 op_dst = (char *)sc->sc_dma.dma_vaddr + xlen;
756
757 op_psrc = sc->sc_dma.dma_paddr;
758 op_pdst = sc->sc_dma.dma_paddr + xlen;
759
760 if (crd->crd_flags & CRD_F_ENCRYPT) {
761 control = SB_CTL_ENC;
762 if (crd->crd_flags & CRD_F_IV_EXPLICIT)
763 bcopy(crd->crd_iv, op_iv, sizeof(op_iv));
764 else
765 bcopy(ses->ses_iv, op_iv, sizeof(op_iv));
766
767 if ((crd->crd_flags & CRD_F_IV_PRESENT) == 0) {
768 crypto_copyback(crp->crp_flags, crp->crp_buf,
769 crd->crd_inject, sizeof(op_iv), op_iv);
770 }
771 } else {
772 control = SB_CTL_DEC;
773 if (crd->crd_flags & CRD_F_IV_EXPLICIT)
774 bcopy(crd->crd_iv, op_iv, sizeof(op_iv));
775 else {
776 crypto_copydata(crp->crp_flags, crp->crp_buf,
777 crd->crd_inject, sizeof(op_iv), op_iv);
778 }
779 }
780
781 offset = 0;
782 tlen = crd->crd_len;
783 piv = op_iv;
784
785 /* Process the data in GLXSB_MAX_AES_LEN chunks */
786 while (tlen > 0) {
787 len = (tlen > GLXSB_MAX_AES_LEN) ? GLXSB_MAX_AES_LEN : tlen;
788 crypto_copydata(crp->crp_flags, crp->crp_buf,
789 crd->crd_skip + offset, len, op_src);
790
791 glxsb_dma_pre_op(sc, &sc->sc_dma);
792
793 error = glxsb_aes(sc, control, op_psrc, op_pdst, ses->ses_key,
794 len, op_iv);
795
796 glxsb_dma_post_op(sc, &sc->sc_dma);
797 if (error != 0)
798 return (error);
799
800 crypto_copyback(crp->crp_flags, crp->crp_buf,
801 crd->crd_skip + offset, len, op_dst);
802
803 offset += len;
804 tlen -= len;
805
806 if (tlen <= 0) { /* Ideally, just == 0 */
807 /* Finished - put the IV in session IV */
808 piv = ses->ses_iv;
809 }
810
811 /*
812 * Copy out last block for use as next iteration/session IV.
813 *
814 * piv is set to op_iv[] before the loop starts, but is
815 * set to ses->ses_iv if we're going to exit the loop this
816 * time.
817 */
818 if (crd->crd_flags & CRD_F_ENCRYPT)
819 bcopy(op_dst + len - sizeof(op_iv), piv, sizeof(op_iv));
820 else {
821 /* Decryption, only need this if another iteration */
822 if (tlen > 0) {
823 bcopy(op_src + len - sizeof(op_iv), piv,
824 sizeof(op_iv));
825 }
826 }
827 } /* while */
828
829 /* All AES processing has now been done. */
830 bzero(sc->sc_dma.dma_vaddr, xlen * 2);
831
832 return (0);
833}
834
835static void
836glxsb_crypto_task(void *arg, int pending)
837{
838 struct glxsb_softc *sc = arg;
839 struct glxsb_session *ses;
840 struct cryptop *crp;
841 struct cryptodesc *enccrd, *maccrd;
842 int error;
843
844 maccrd = sc->sc_to.to_maccrd;
845 enccrd = sc->sc_to.to_enccrd;
846 crp = sc->sc_to.to_crp;
847 ses = sc->sc_to.to_ses;
848
849 /* Perform data authentication if requested before encryption */
850 if (maccrd != NULL && maccrd->crd_next == enccrd) {
851 error = glxsb_hash_process(ses, maccrd, crp);
852 if (error != 0)
853 goto out;
854 }
855
856 error = glxsb_crypto_encdec(crp, enccrd, ses, sc);
857 if (error != 0)
858 goto out;
859
860 /* Perform data authentication if requested after encryption */
861 if (maccrd != NULL && enccrd->crd_next == maccrd) {
862 error = glxsb_hash_process(ses, maccrd, crp);
863 if (error != 0)
864 goto out;
865 }
866out:
f0dfb0dc 867 spin_lock_wr(&sc->sc_task_mtx);
c8ee5416 868 sc->sc_task_count--;
f0dfb0dc 869 spin_unlock_wr(&sc->sc_task_mtx);
c8ee5416
AH		 870
871 crp->crp_etype = error;
872 crypto_unblock(sc->sc_cid, CRYPTO_SYMQ);
873 crypto_done(crp);
874}
875
876static int
877glxsb_crypto_process(device_t dev, struct cryptop *crp, int hint)
878{
879 struct glxsb_softc *sc = device_get_softc(dev);
880 struct glxsb_session *ses;
881 struct cryptodesc *crd, *enccrd, *maccrd;
882 uint32_t sid;
883 int error = 0;
884
885 enccrd = maccrd = NULL;
886
887 /* Sanity check. */
888 if (crp == NULL)
889 return (EINVAL);
890
891 if (crp->crp_callback == NULL || crp->crp_desc == NULL) {
892 error = EINVAL;
893 goto fail;
894 }
895
896 for (crd = crp->crp_desc; crd != NULL; crd = crd->crd_next) {
897 switch (crd->crd_alg) {
898 case CRYPTO_NULL_HMAC:
899 case CRYPTO_MD5_HMAC:
900 case CRYPTO_SHA1_HMAC:
901 case CRYPTO_RIPEMD160_HMAC:
902 case CRYPTO_SHA2_256_HMAC:
903 case CRYPTO_SHA2_384_HMAC:
904 case CRYPTO_SHA2_512_HMAC:
905 if (maccrd != NULL) {
906 error = EINVAL;
907 goto fail;
908 }
909 maccrd = crd;
910 break;
911 case CRYPTO_AES_CBC:
912 if (enccrd != NULL) {
913 error = EINVAL;
914 goto fail;
915 }
916 enccrd = crd;
917 break;
918 default:
919 error = EINVAL;
920 goto fail;
921 }
922 }
923
924 if (enccrd == NULL || enccrd->crd_len % AES_BLOCK_LEN != 0) {
925 error = EINVAL;
926 goto fail;
927 }
928
929 sid = crp->crp_sid & 0xffffffff;
f0dfb0dc 930 spin_lock_wr(&sc->sc_sessions_lock);
c8ee5416
AH		 931 TAILQ_FOREACH_REVERSE(ses, &sc->sc_sessions, ses_head, ses_next) {
932 if (ses->ses_id == sid)
933 break;
934 }
f0dfb0dc 935 spin_unlock_wr(&sc->sc_sessions_lock);
c8ee5416
AH		 936 if (ses == NULL || !ses->ses_used) {
937 error = EINVAL;
938 goto fail;
939 }
940
f0dfb0dc 941 spin_lock_wr(&sc->sc_task_mtx);
c8ee5416 942 if (sc->sc_task_count != 0) {
f0dfb0dc 943 spin_unlock_wr(&sc->sc_task_mtx);
c8ee5416
AH		 944 return (ERESTART);
945 }
946 sc->sc_task_count++;
947
948 sc->sc_to.to_maccrd = maccrd;
949 sc->sc_to.to_enccrd = enccrd;
950 sc->sc_to.to_crp = crp;
951 sc->sc_to.to_ses = ses;
f0dfb0dc
AH		 952 spin_unlock_wr(&sc->sc_task_mtx);
953 /* XXX: thread taskqueues ? */
c8ee5416
AH		 954 taskqueue_enqueue(sc->sc_tq, &sc->sc_cryptotask);
955 return(0);
956
957fail:
958 crp->crp_etype = error;
959 crypto_done(crp);
960 return (error);
961}
DragonFly Project GIT Source repo