summaryrefslogtreecommitdiff
path: root/drivers/crypto/n2_core.c
blob: 5613b8affe11424295a51bbc9edfe02afc55afce (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
/* n2_core.c: Niagara2 Stream Processing Unit (SPU) crypto support.
 *
 * Copyright (C) 2010 David S. Miller <davem@davemloft.net>
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/cpumask.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/crypto.h>
#include <crypto/md5.h>
#include <crypto/sha.h>
#include <crypto/aes.h>
#include <crypto/des.h>
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/sched.h>

#include <crypto/internal/hash.h>
#include <crypto/scatterwalk.h>
#include <crypto/algapi.h>

#include <asm/hypervisor.h>
#include <asm/mdesc.h>

#include "n2_core.h"

#define DRV_MODULE_NAME		"n2_crypto"
#define DRV_MODULE_VERSION	"0.1"
#define DRV_MODULE_RELDATE	"April 29, 2010"

static char version[] __devinitdata =
	DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";

MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
MODULE_DESCRIPTION("Niagara2 Crypto driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_MODULE_VERSION);

#define N2_CRA_PRIORITY		300

static DEFINE_MUTEX(spu_lock);

struct spu_queue {
	cpumask_t		sharing;
	unsigned long		qhandle;

	spinlock_t		lock;
	u8			q_type;
	void			*q;
	unsigned long		head;
	unsigned long		tail;
	struct list_head	jobs;

	unsigned long		devino;

	char			irq_name[32];
	unsigned int		irq;

	struct list_head	list;
};

static struct spu_queue **cpu_to_cwq;
static struct spu_queue **cpu_to_mau;

static unsigned long spu_next_offset(struct spu_queue *q, unsigned long off)
{
	if (q->q_type == HV_NCS_QTYPE_MAU) {
		off += MAU_ENTRY_SIZE;
		if (off == (MAU_ENTRY_SIZE * MAU_NUM_ENTRIES))
			off = 0;
	} else {
		off += CWQ_ENTRY_SIZE;
		if (off == (CWQ_ENTRY_SIZE * CWQ_NUM_ENTRIES))
			off = 0;
	}
	return off;
}

struct n2_request_common {
	struct list_head	entry;
	unsigned int		offset;
};
#define OFFSET_NOT_RUNNING	(~(unsigned int)0)

/* An async job request records the final tail value it used in
 * n2_request_common->offset, test to see if that offset is in
 * the range old_head, new_head, inclusive.
 */
static inline bool job_finished(struct spu_queue *q, unsigned int offset,
				unsigned long old_head, unsigned long new_head)
{
	if (old_head <= new_head) {
		if (offset > old_head && offset <= new_head)
			return true;
	} else {
		if (offset > old_head || offset <= new_head)
			return true;
	}
	return false;
}

/* When the HEAD marker is unequal to the actual HEAD, we get
 * a virtual device INO interrupt.  We should process the
 * completed CWQ entries and adjust the HEAD marker to clear
 * the IRQ.
 */
static irqreturn_t cwq_intr(int irq, void *dev_id)
{
	unsigned long off, new_head, hv_ret;
	struct spu_queue *q = dev_id;

	pr_err("CPU[%d]: Got CWQ interrupt for qhdl[%lx]\n",
	       smp_processor_id(), q->qhandle);

	spin_lock(&q->lock);

	hv_ret = sun4v_ncs_gethead(q->qhandle, &new_head);

	pr_err("CPU[%d]: CWQ gethead[%lx] hv_ret[%lu]\n",
	       smp_processor_id(), new_head, hv_ret);

	for (off = q->head; off != new_head; off = spu_next_offset(q, off)) {
		/* XXX ... XXX */
	}

	hv_ret = sun4v_ncs_sethead_marker(q->qhandle, new_head);
	if (hv_ret == HV_EOK)
		q->head = new_head;

	spin_unlock(&q->lock);

	return IRQ_HANDLED;
}

static irqreturn_t mau_intr(int irq, void *dev_id)
{
	struct spu_queue *q = dev_id;
	unsigned long head, hv_ret;

	spin_lock(&q->lock);

	pr_err("CPU[%d]: Got MAU interrupt for qhdl[%lx]\n",
	       smp_processor_id(), q->qhandle);

	hv_ret = sun4v_ncs_gethead(q->qhandle, &head);

	pr_err("CPU[%d]: MAU gethead[%lx] hv_ret[%lu]\n",
	       smp_processor_id(), head, hv_ret);

	sun4v_ncs_sethead_marker(q->qhandle, head);

	spin_unlock(&q->lock);

	return IRQ_HANDLED;
}

static void *spu_queue_next(struct spu_queue *q, void *cur)
{
	return q->q + spu_next_offset(q, cur - q->q);
}

static int spu_queue_num_free(struct spu_queue *q)
{
	unsigned long head = q->head;
	unsigned long tail = q->tail;
	unsigned long end = (CWQ_ENTRY_SIZE * CWQ_NUM_ENTRIES);
	unsigned long diff;

	if (head > tail)
		diff = head - tail;
	else
		diff = (end - tail) + head;

	return (diff / CWQ_ENTRY_SIZE) - 1;
}

static void *spu_queue_alloc(struct spu_queue *q, int num_entries)
{
	int avail = spu_queue_num_free(q);

	if (avail >= num_entries)
		return q->q + q->tail;

	return NULL;
}

static unsigned long spu_queue_submit(struct spu_queue *q, void *last)
{
	unsigned long hv_ret, new_tail;

	new_tail = spu_next_offset(q, last - q->q);

	hv_ret = sun4v_ncs_settail(q->qhandle, new_tail);
	if (hv_ret == HV_EOK)
		q->tail = new_tail;
	return hv_ret;
}

static u64 control_word_base(unsigned int len, unsigned int hmac_key_len,
			     int enc_type, int auth_type,
			     unsigned int hash_len,
			     bool sfas, bool sob, bool eob, bool encrypt,
			     int opcode)
{
	u64 word = (len - 1) & CONTROL_LEN;

	word |= ((u64) opcode << CONTROL_OPCODE_SHIFT);
	word |= ((u64) enc_type << CONTROL_ENC_TYPE_SHIFT);
	word |= ((u64) auth_type << CONTROL_AUTH_TYPE_SHIFT);
	if (sfas)
		word |= CONTROL_STORE_FINAL_AUTH_STATE;
	if (sob)
		word |= CONTROL_START_OF_BLOCK;
	if (eob)
		word |= CONTROL_END_OF_BLOCK;
	if (encrypt)
		word |= CONTROL_ENCRYPT;
	if (hmac_key_len)
		word |= ((u64) (hmac_key_len - 1)) << CONTROL_HMAC_KEY_LEN_SHIFT;
	if (hash_len)
		word |= ((u64) (hash_len - 1)) << CONTROL_HASH_LEN_SHIFT;

	return word;
}

#if 0
static inline bool n2_should_run_async(struct spu_queue *qp, int this_len)
{
	if (this_len >= 64 ||
	    qp->head != qp->tail)
		return true;
	return false;
}
#endif

struct n2_base_ctx {
	struct list_head		list;
};

static void n2_base_ctx_init(struct n2_base_ctx *ctx)
{
	INIT_LIST_HEAD(&ctx->list);
}

struct n2_hash_ctx {
	struct n2_base_ctx		base;

	struct crypto_ahash		*fallback;

	/* These next three members must match the layout created by
	 * crypto_init_shash_ops_async.  This allows us to properly
	 * plumb requests we can't do in hardware down to the fallback
	 * operation, providing all of the data structures and layouts
	 * expected by those paths.
	 */
	struct ahash_request		fallback_req;
	struct shash_desc		fallback_desc;
	union {
		struct md5_state	md5;
		struct sha1_state	sha1;
		struct sha256_state	sha256;
	} u;

	unsigned char			hash_key[64];
	unsigned char			keyed_zero_hash[32];
};

static int n2_hash_async_init(struct ahash_request *req)
{
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
	struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);

	ctx->fallback_req.base.tfm = crypto_ahash_tfm(ctx->fallback);
	ctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;

	return crypto_ahash_init(&ctx->fallback_req);
}

static int n2_hash_async_update(struct ahash_request *req)
{
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
	struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);

	ctx->fallback_req.base.tfm = crypto_ahash_tfm(ctx->fallback);
	ctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	ctx->fallback_req.nbytes = req->nbytes;
	ctx->fallback_req.src = req->src;

	return crypto_ahash_update(&ctx->fallback_req);
}

static int n2_hash_async_final(struct ahash_request *req)
{
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
	struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);

	ctx->fallback_req.base.tfm = crypto_ahash_tfm(ctx->fallback);
	ctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	ctx->fallback_req.result = req->result;

	return crypto_ahash_final(&ctx->fallback_req);
}

static int n2_hash_async_finup(struct ahash_request *req)
{
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
	struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);

	ctx->fallback_req.base.tfm = crypto_ahash_tfm(ctx->fallback);
	ctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	ctx->fallback_req.nbytes = req->nbytes;
	ctx->fallback_req.src = req->src;
	ctx->fallback_req.result = req->result;

	return crypto_ahash_finup(&ctx->fallback_req);
}

static int n2_hash_cra_init(struct crypto_tfm *tfm)
{
	const char *fallback_driver_name = tfm->__crt_alg->cra_name;
	struct crypto_ahash *ahash = __crypto_ahash_cast(tfm);
	struct n2_hash_ctx *ctx = crypto_ahash_ctx(ahash);
	struct crypto_ahash *fallback_tfm;
	int err;

	fallback_tfm = crypto_alloc_ahash(fallback_driver_name, 0,
					  CRYPTO_ALG_NEED_FALLBACK);
	if (IS_ERR(fallback_tfm)) {
		pr_warning("Fallback driver '%s' could not be loaded!\n",
			   fallback_driver_name);
		err = PTR_ERR(fallback_tfm);
		goto out;
	}

	ctx->fallback = fallback_tfm;
	return 0;

out:
	return err;
}

static void n2_hash_cra_exit(struct crypto_tfm *tfm)
{
	struct crypto_ahash *ahash = __crypto_ahash_cast(tfm);
	struct n2_hash_ctx *ctx = crypto_ahash_ctx(ahash);

	crypto_free_ahash(ctx->fallback);
}

static unsigned long wait_for_tail(struct spu_queue *qp)
{
	unsigned long head, hv_ret;

	do {
		hv_ret = sun4v_ncs_gethead(qp->qhandle, &head);
		if (hv_ret != HV_EOK) {
			pr_err("Hypervisor error on gethead\n");
			break;
		}
		if (head == qp->tail) {
			qp->head = head;
			break;
		}
	} while (1);
	return hv_ret;
}

static unsigned long submit_and_wait_for_tail(struct spu_queue *qp,
					      struct cwq_initial_entry *ent)
{
	unsigned long hv_ret = spu_queue_submit(qp, ent);

	if (hv_ret == HV_EOK)
		hv_ret = wait_for_tail(qp);

	return hv_ret;
}

static int n2_hash_async_digest(struct ahash_request *req,
				unsigned int auth_type, unsigned int digest_size,
				unsigned int result_size, void *hash_loc)
{
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
	struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
	struct cwq_initial_entry *ent;
	struct crypto_hash_walk walk;
	struct spu_queue *qp;
	unsigned long flags;
	int err = -ENODEV;
	int nbytes, cpu;

	/* The total effective length of the operation may not
	 * exceed 2^16.
	 */
	if (unlikely(req->nbytes > (1 << 16))) {
		ctx->fallback_req.base.tfm = crypto_ahash_tfm(ctx->fallback);
		ctx->fallback_req.base.flags =
			req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
		ctx->fallback_req.nbytes = req->nbytes;
		ctx->fallback_req.src = req->src;
		ctx->fallback_req.result = req->result;

		return crypto_ahash_digest(&ctx->fallback_req);
	}

	n2_base_ctx_init(&ctx->base);

	nbytes = crypto_hash_walk_first(req, &walk);

	cpu = get_cpu();
	qp = cpu_to_cwq[cpu];
	if (!qp)
		goto out;

	spin_lock_irqsave(&qp->lock, flags);

	/* XXX can do better, improve this later by doing a by-hand scatterlist
	 * XXX walk, etc.
	 */
	ent = qp->q + qp->tail;

	ent->control = control_word_base(nbytes, 0, 0,
					 auth_type, digest_size,
					 false, true, false, false,
					 OPCODE_INPLACE_BIT |
					 OPCODE_AUTH_MAC);
	ent->src_addr = __pa(walk.data);
	ent->auth_key_addr = 0UL;
	ent->auth_iv_addr = __pa(hash_loc);
	ent->final_auth_state_addr = 0UL;
	ent->enc_key_addr = 0UL;
	ent->enc_iv_addr = 0UL;
	ent->dest_addr = __pa(hash_loc);

	nbytes = crypto_hash_walk_done(&walk, 0);
	while (nbytes > 0) {
		ent = spu_queue_next(qp, ent);

		ent->control = (nbytes - 1);
		ent->src_addr = __pa(walk.data);
		ent->auth_key_addr = 0UL;
		ent->auth_iv_addr = 0UL;
		ent->final_auth_state_addr = 0UL;
		ent->enc_key_addr = 0UL;
		ent->enc_iv_addr = 0UL;
		ent->dest_addr = 0UL;

		nbytes = crypto_hash_walk_done(&walk, 0);
	}
	ent->control |= CONTROL_END_OF_BLOCK;

	if (submit_and_wait_for_tail(qp, ent) != HV_EOK)
		err = -EINVAL;
	else
		err = 0;

	spin_unlock_irqrestore(&qp->lock, flags);

	if (!err)
		memcpy(req->result, hash_loc, result_size);
out:
	put_cpu();

	return err;
}

static int n2_md5_async_digest(struct ahash_request *req)
{
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
	struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
	struct md5_state *m = &ctx->u.md5;

	if (unlikely(req->nbytes == 0)) {
		static const char md5_zero[MD5_DIGEST_SIZE] = {
			0xd4, 0x1d, 0x8c, 0xd9, 0x8f, 0x00, 0xb2, 0x04,
			0xe9, 0x80, 0x09, 0x98, 0xec, 0xf8, 0x42, 0x7e,
		};

		memcpy(req->result, md5_zero, MD5_DIGEST_SIZE);
		return 0;
	}
	m->hash[0] = cpu_to_le32(0x67452301);
	m->hash[1] = cpu_to_le32(0xefcdab89);
	m->hash[2] = cpu_to_le32(0x98badcfe);
	m->hash[3] = cpu_to_le32(0x10325476);

	return n2_hash_async_digest(req, AUTH_TYPE_MD5,
				    MD5_DIGEST_SIZE, MD5_DIGEST_SIZE,
				    m->hash);
}

static int n2_sha1_async_digest(struct ahash_request *req)
{
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
	struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
	struct sha1_state *s = &ctx->u.sha1;

	if (unlikely(req->nbytes == 0)) {
		static const char sha1_zero[SHA1_DIGEST_SIZE] = {
			0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d, 0x32,
			0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90, 0xaf, 0xd8,
			0x07, 0x09
		};

		memcpy(req->result, sha1_zero, SHA1_DIGEST_SIZE);
		return 0;
	}
	s->state[0] = SHA1_H0;
	s->state[1] = SHA1_H1;
	s->state[2] = SHA1_H2;
	s->state[3] = SHA1_H3;
	s->state[4] = SHA1_H4;

	return n2_hash_async_digest(req, AUTH_TYPE_SHA1,
				    SHA1_DIGEST_SIZE, SHA1_DIGEST_SIZE,
				    s->state);
}

static int n2_sha256_async_digest(struct ahash_request *req)
{
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
	struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
	struct sha256_state *s = &ctx->u.sha256;

	if (req->nbytes == 0) {
		static const char sha256_zero[SHA256_DIGEST_SIZE] = {
			0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, 0x9a,
			0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae,
			0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c, 0xa4, 0x95, 0x99,
			0x1b, 0x78, 0x52, 0xb8, 0x55
		};

		memcpy(req->result, sha256_zero, SHA256_DIGEST_SIZE);
		return 0;
	}
	s->state[0] = SHA256_H0;
	s->state[1] = SHA256_H1;
	s->state[2] = SHA256_H2;
	s->state[3] = SHA256_H3;
	s->state[4] = SHA256_H4;
	s->state[5] = SHA256_H5;
	s->state[6] = SHA256_H6;
	s->state[7] = SHA256_H7;

	return n2_hash_async_digest(req, AUTH_TYPE_SHA256,
				    SHA256_DIGEST_SIZE, SHA256_DIGEST_SIZE,
				    s->state);
}

static int n2_sha224_async_digest(struct ahash_request *req)
{
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
	struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
	struct sha256_state *s = &ctx->u.sha256;

	if (req->nbytes == 0) {
		static const char sha224_zero[SHA224_DIGEST_SIZE] = {
			0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9, 0x47,
			0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4, 0x15, 0xa2,
			0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a, 0xc5, 0xb3, 0xe4,
			0x2f
		};

		memcpy(req->result, sha224_zero, SHA224_DIGEST_SIZE);
		return 0;
	}
	s->state[0] = SHA224_H0;
	s->state[1] = SHA224_H1;
	s->state[2] = SHA224_H2;
	s->state[3] = SHA224_H3;
	s->state[4] = SHA224_H4;
	s->state[5] = SHA224_H5;
	s->state[6] = SHA224_H6;
	s->state[7] = SHA224_H7;

	return n2_hash_async_digest(req, AUTH_TYPE_SHA256,
				    SHA256_DIGEST_SIZE, SHA224_DIGEST_SIZE,
				    s->state);
}

struct n2_cipher_context {
	int			key_len;
	int			enc_type;
	union {
		u8		aes[AES_MAX_KEY_SIZE];
		u8		des[DES_KEY_SIZE];
		u8		des3[3 * DES_KEY_SIZE];
		u8		arc4[258]; /* S-box, X, Y */
	} key;
};

#define N2_CHUNK_ARR_LEN	16

struct n2_crypto_chunk {
	struct list_head	entry;
	unsigned long		iv_paddr : 44;
	unsigned long		arr_len : 20;
	unsigned long		dest_paddr;
	unsigned long		dest_final;
	struct {
		unsigned long	src_paddr : 44;
		unsigned long	src_len : 20;
	} arr[N2_CHUNK_ARR_LEN];
};

struct n2_request_context {
	struct ablkcipher_walk	walk;
	struct list_head	chunk_list;
	struct n2_crypto_chunk	chunk;
	u8			temp_iv[16];
};

/* The SPU allows some level of flexibility for partial cipher blocks
 * being specified in a descriptor.
 *
 * It merely requires that every descriptor's length field is at least
 * as large as the cipher block size.  This means that a cipher block
 * can span at most 2 descriptors.  However, this does not allow a
 * partial block to span into the final descriptor as that would
 * violate the rule (since every descriptor's length must be at lest
 * the block size).  So, for example, assuming an 8 byte block size:
 *
 *	0xe --> 0xa --> 0x8
 *
 * is a valid length sequence, whereas:
 *
 *	0xe --> 0xb --> 0x7
 *
 * is not a valid sequence.
 */

struct n2_cipher_alg {
	struct list_head	entry;
	u8			enc_type;
	struct crypto_alg	alg;
};

static inline struct n2_cipher_alg *n2_cipher_alg(struct crypto_tfm *tfm)
{
	struct crypto_alg *alg = tfm->__crt_alg;

	return container_of(alg, struct n2_cipher_alg, alg);
}

struct n2_cipher_request_context {
	struct ablkcipher_walk	walk;
};

static int n2_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
			 unsigned int keylen)
{
	struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
	struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
	struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);

	ctx->enc_type = (n2alg->enc_type & ENC_TYPE_CHAINING_MASK);

	switch (keylen) {
	case AES_KEYSIZE_128:
		ctx->enc_type |= ENC_TYPE_ALG_AES128;
		break;
	case AES_KEYSIZE_192:
		ctx->enc_type |= ENC_TYPE_ALG_AES192;
		break;
	case AES_KEYSIZE_256:
		ctx->enc_type |= ENC_TYPE_ALG_AES256;
		break;
	default:
		crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
		return -EINVAL;
	}

	ctx->key_len = keylen;
	memcpy(ctx->key.aes, key, keylen);
	return 0;
}

static int n2_des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
			 unsigned int keylen)
{
	struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
	struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
	struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);
	u32 tmp[DES_EXPKEY_WORDS];
	int err;

	ctx->enc_type = n2alg->enc_type;

	if (keylen != DES_KEY_SIZE) {
		crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
		return -EINVAL;
	}

	err = des_ekey(tmp, key);
	if (err == 0 && (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
		tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
		return -EINVAL;
	}

	ctx->key_len = keylen;
	memcpy(ctx->key.des, key, keylen);
	return 0;
}

static int n2_3des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
			  unsigned int keylen)
{
	struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
	struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
	struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);

	ctx->enc_type = n2alg->enc_type;

	if (keylen != (3 * DES_KEY_SIZE)) {
		crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
		return -EINVAL;
	}
	ctx->key_len = keylen;
	memcpy(ctx->key.des3, key, keylen);
	return 0;
}

static int n2_arc4_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
			  unsigned int keylen)
{
	struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
	struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
	struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);
	u8 *s = ctx->key.arc4;
	u8 *x = s + 256;
	u8 *y = x + 1;
	int i, j, k;

	ctx->enc_type = n2alg->enc_type;

	j = k = 0;
	*x = 0;
	*y = 0;
	for (i = 0; i < 256; i++)
		s[i] = i;
	for (i = 0; i < 256; i++) {
		u8 a = s[i];
		j = (j + key[k] + a) & 0xff;
		s[i] = s[j];
		s[j] = a;
		if (++k >= keylen)
			k = 0;
	}

	return 0;
}

static inline int cipher_descriptor_len(int nbytes, unsigned int block_size)
{
	int this_len = nbytes;

	this_len -= (nbytes & (block_size - 1));
	return this_len > (1 << 16) ? (1 << 16) : this_len;
}

static int __n2_crypt_chunk(struct crypto_tfm *tfm, struct n2_crypto_chunk *cp,
			    struct spu_queue *qp, bool encrypt)
{
	struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
	struct cwq_initial_entry *ent;
	bool in_place;
	int i;

	ent = spu_queue_alloc(qp, cp->arr_len);
	if (!ent) {
		pr_info("queue_alloc() of %d fails\n",
			cp->arr_len);
		return -EBUSY;
	}

	in_place = (cp->dest_paddr == cp->arr[0].src_paddr);

	ent->control = control_word_base(cp->arr[0].src_len,
					 0, ctx->enc_type, 0, 0,
					 false, true, false, encrypt,
					 OPCODE_ENCRYPT |
					 (in_place ? OPCODE_INPLACE_BIT : 0));
	ent->src_addr = cp->arr[0].src_paddr;
	ent->auth_key_addr = 0UL;
	ent->auth_iv_addr = 0UL;
	ent->final_auth_state_addr = 0UL;
	ent->enc_key_addr = __pa(&ctx->key);
	ent->enc_iv_addr = cp->iv_paddr;
	ent->dest_addr = (in_place ? 0UL : cp->dest_paddr);

	for (i = 1; i < cp->arr_len; i++) {
		ent = spu_queue_next(qp, ent);

		ent->control = cp->arr[i].src_len - 1;
		ent->src_addr = cp->arr[i].src_paddr;
		ent->auth_key_addr = 0UL;
		ent->auth_iv_addr = 0UL;
		ent->final_auth_state_addr = 0UL;
		ent->enc_key_addr = 0UL;
		ent->enc_iv_addr = 0UL;
		ent->dest_addr = 0UL;
	}
	ent->control |= CONTROL_END_OF_BLOCK;

	return (spu_queue_submit(qp, ent) != HV_EOK) ? -EINVAL : 0;
}

static int n2_compute_chunks(struct ablkcipher_request *req)
{
	struct n2_request_context *rctx = ablkcipher_request_ctx(req);
	struct ablkcipher_walk *walk = &rctx->walk;
	struct n2_crypto_chunk *chunk;
	unsigned long dest_prev;
	unsigned int tot_len;
	bool prev_in_place;
	int err, nbytes;

	ablkcipher_walk_init(walk, req->dst, req->src, req->nbytes);
	err = ablkcipher_walk_phys(req, walk);
	if (err)
		return err;

	INIT_LIST_HEAD(&rctx->chunk_list);

	chunk = &rctx->chunk;
	INIT_LIST_HEAD(&chunk->entry);

	chunk->iv_paddr = 0UL;
	chunk->arr_len = 0;
	chunk->dest_paddr = 0UL;

	prev_in_place = false;
	dest_prev = ~0UL;
	tot_len = 0;

	while ((nbytes = walk->nbytes) != 0) {
		unsigned long dest_paddr, src_paddr;
		bool in_place;
		int this_len;

		src_paddr = (page_to_phys(walk->src.page) +
			     walk->src.offset);
		dest_paddr = (page_to_phys(walk->dst.page) +
			      walk->dst.offset);
		in_place = (src_paddr == dest_paddr);
		this_len = cipher_descriptor_len(nbytes, walk->blocksize);

		if (chunk->arr_len != 0) {
			if (in_place != prev_in_place ||
			    (!prev_in_place &&
			     dest_paddr != dest_prev) ||
			    chunk->arr_len == N2_CHUNK_ARR_LEN ||
			    tot_len + this_len > (1 << 16)) {
				chunk->dest_final = dest_prev;
				list_add_tail(&chunk->entry,
					      &rctx->chunk_list);
				chunk = kzalloc(sizeof(*chunk), GFP_ATOMIC);
				if (!chunk) {
					err = -ENOMEM;
					break;
				}
				INIT_LIST_HEAD(&chunk->entry);
			}
		}
		if (chunk->arr_len == 0) {
			chunk->dest_paddr = dest_paddr;
			tot_len = 0;
		}
		chunk->arr[chunk->arr_len].src_paddr = src_paddr;
		chunk->arr[chunk->arr_len].src_len = this_len;
		chunk->arr_len++;

		dest_prev = dest_paddr + this_len;
		prev_in_place = in_place;
		tot_len += this_len;

		err = ablkcipher_walk_done(req, walk, nbytes - this_len);
		if (err)
			break;
	}
	if (!err && chunk->arr_len != 0) {
		chunk->dest_final = dest_prev;
		list_add_tail(&chunk->entry, &rctx->chunk_list);
	}

	return err;
}

static void n2_chunk_complete(struct ablkcipher_request *req, void *final_iv)
{
	struct n2_request_context *rctx = ablkcipher_request_ctx(req);
	struct n2_crypto_chunk *c, *tmp;

	if (final_iv)
		memcpy(rctx->walk.iv, final_iv, rctx->walk.blocksize);

	ablkcipher_walk_complete(&rctx->walk);
	list_for_each_entry_safe(c, tmp, &rctx->chunk_list, entry) {
		list_del(&c->entry);
		if (unlikely(c != &rctx->chunk))
			kfree(c);
	}

}

static int n2_do_ecb(struct ablkcipher_request *req, bool encrypt)
{
	struct n2_request_context *rctx = ablkcipher_request_ctx(req);
	struct crypto_tfm *tfm = req->base.tfm;
	int err = n2_compute_chunks(req);
	struct n2_crypto_chunk *c, *tmp;
	unsigned long flags, hv_ret;
	struct spu_queue *qp;

	if (err)
		return err;

	qp = cpu_to_cwq[get_cpu()];
	err = -ENODEV;
	if (!qp)
		goto out;

	spin_lock_irqsave(&qp->lock, flags);

	list_for_each_entry_safe(c, tmp, &rctx->chunk_list, entry) {
		err = __n2_crypt_chunk(tfm, c, qp, encrypt);
		if (err)
			break;
		list_del(&c->entry);
		if (unlikely(c != &rctx->chunk))
			kfree(c);
	}
	if (!err) {
		hv_ret = wait_for_tail(qp);
		if (hv_ret != HV_EOK)
			err = -EINVAL;
	}

	spin_unlock_irqrestore(&qp->lock, flags);

	put_cpu();

out:
	n2_chunk_complete(req, NULL);
	return err;
}

static int n2_encrypt_ecb(struct ablkcipher_request *req)
{
	return n2_do_ecb(req, true);
}

static int n2_decrypt_ecb(struct ablkcipher_request *req)
{
	return n2_do_ecb(req, false);
}

static int n2_do_chaining(struct ablkcipher_request *req, bool encrypt)
{
	struct n2_request_context *rctx = ablkcipher_request_ctx(req);
	struct crypto_tfm *tfm = req->base.tfm;
	unsigned long flags, hv_ret, iv_paddr;
	int err = n2_compute_chunks(req);
	struct n2_crypto_chunk *c, *tmp;
	struct spu_queue *qp;
	void *final_iv_addr;

	final_iv_addr = NULL;

	if (err)
		return err;

	qp = cpu_to_cwq[get_cpu()];
	err = -ENODEV;
	if (!qp)
		goto out;

	spin_lock_irqsave(&qp->lock, flags);

	if (encrypt) {
		iv_paddr = __pa(rctx->walk.iv);
		list_for_each_entry_safe(c, tmp, &rctx->chunk_list,
					 entry) {
			c->iv_paddr = iv_paddr;
			err = __n2_crypt_chunk(tfm, c, qp, true);
			if (err)
				break;
			iv_paddr = c->dest_final - rctx->walk.blocksize;
			list_del(&c->entry);
			if (unlikely(c != &rctx->chunk))
				kfree(c);
		}
		final_iv_addr = __va(iv_paddr);
	} else {
		list_for_each_entry_safe_reverse(c, tmp, &rctx->chunk_list,
						 entry) {
			if (c == &rctx->chunk) {
				iv_paddr = __pa(rctx->walk.iv);
			} else {
				iv_paddr = (tmp->arr[tmp->arr_len-1].src_paddr +
					    tmp->arr[tmp->arr_len-1].src_len -
					    rctx->walk.blocksize);
			}
			if (!final_iv_addr) {
				unsigned long pa;

				pa = (c->arr[c->arr_len-1].src_paddr +
				      c->arr[c->arr_len-1].src_len -
				      rctx->walk.blocksize);
				final_iv_addr = rctx->temp_iv;
				memcpy(rctx->temp_iv, __va(pa),
				       rctx->walk.blocksize);
			}
			c->iv_paddr = iv_paddr;
			err = __n2_crypt_chunk(tfm, c, qp, false);
			if (err)
				break;
			list_del(&c->entry);
			if (unlikely(c != &rctx->chunk))
				kfree(c);
		}
	}
	if (!err) {
		hv_ret = wait_for_tail(qp);
		if (hv_ret != HV_EOK)
			err = -EINVAL;
	}

	spin_unlock_irqrestore(&qp->lock, flags);

	put_cpu();

out:
	n2_chunk_complete(req, err ? NULL : final_iv_addr);
	return err;
}

static int n2_encrypt_chaining(struct ablkcipher_request *req)
{
	return n2_do_chaining(req, true);
}

static int n2_decrypt_chaining(struct ablkcipher_request *req)
{
	return n2_do_chaining(req, false);
}

struct n2_cipher_tmpl {
	const char		*name;
	const char		*drv_name;
	u8			block_size;
	u8			enc_type;
	struct ablkcipher_alg	ablkcipher;
};

static const struct n2_cipher_tmpl cipher_tmpls[] = {
	/* ARC4: only ECB is supported (chaining bits ignored) */
	{	.name		= "ecb(arc4)",
		.drv_name	= "ecb-arc4",
		.block_size	= 1,
		.enc_type	= (ENC_TYPE_ALG_RC4_STREAM |
				   ENC_TYPE_CHAINING_ECB),
		.ablkcipher	= {
			.min_keysize	= 1,
			.max_keysize	= 256,
			.setkey		= n2_arc4_setkey,
			.encrypt	= n2_encrypt_ecb,
			.decrypt	= n2_decrypt_ecb,
		},
	},

	/* DES: ECB CBC and CFB are supported */
	{	.name		= "ecb(des)",
		.drv_name	= "ecb-des",
		.block_size	= DES_BLOCK_SIZE,
		.enc_type	= (ENC_TYPE_ALG_DES |
				   ENC_TYPE_CHAINING_ECB),
		.ablkcipher	= {
			.min_keysize	= DES_KEY_SIZE,
			.max_keysize	= DES_KEY_SIZE,
			.setkey		= n2_des_setkey,
			.encrypt	= n2_encrypt_ecb,
			.decrypt	= n2_decrypt_ecb,
		},
	},
	{	.name		= "cbc(des)",
		.drv_name	= "cbc-des",
		.block_size	= DES_BLOCK_SIZE,
		.enc_type	= (ENC_TYPE_ALG_DES |
				   ENC_TYPE_CHAINING_CBC),
		.ablkcipher	= {
			.ivsize		= DES_BLOCK_SIZE,
			.min_keysize	= DES_KEY_SIZE,
			.max_keysize	= DES_KEY_SIZE,
			.setkey		= n2_des_setkey,
			.encrypt	= n2_encrypt_chaining,
			.decrypt	= n2_decrypt_chaining,
		},
	},
	{	.name		= "cfb(des)",
		.drv_name	= "cfb-des",
		.block_size	= DES_BLOCK_SIZE,
		.enc_type	= (ENC_TYPE_ALG_DES |
				   ENC_TYPE_CHAINING_CFB),
		.ablkcipher	= {
			.min_keysize	= DES_KEY_SIZE,
			.max_keysize	= DES_KEY_SIZE,
			.setkey		= n2_des_setkey,
			.encrypt	= n2_encrypt_chaining,
			.decrypt	= n2_decrypt_chaining,
		},
	},

	/* 3DES: ECB CBC and CFB are supported */
	{	.name		= "ecb(des3_ede)",
		.drv_name	= "ecb-3des",
		.block_size	= DES_BLOCK_SIZE,
		.enc_type	= (ENC_TYPE_ALG_3DES |
				   ENC_TYPE_CHAINING_ECB),
		.ablkcipher	= {
			.min_keysize	= 3 * DES_KEY_SIZE,
			.max_keysize	= 3 * DES_KEY_SIZE,
			.setkey		= n2_3des_setkey,
			.encrypt	= n2_encrypt_ecb,
			.decrypt	= n2_decrypt_ecb,
		},
	},
	{	.name		= "cbc(des3_ede)",
		.drv_name	= "cbc-3des",
		.block_size	= DES_BLOCK_SIZE,
		.enc_type	= (ENC_TYPE_ALG_3DES |
				   ENC_TYPE_CHAINING_CBC),
		.ablkcipher	= {
			.ivsize		= DES_BLOCK_SIZE,
			.min_keysize	= 3 * DES_KEY_SIZE,
			.max_keysize	= 3 * DES_KEY_SIZE,
			.setkey		= n2_3des_setkey,
			.encrypt	= n2_encrypt_chaining,
			.decrypt	= n2_decrypt_chaining,
		},
	},
	{	.name		= "cfb(des3_ede)",
		.drv_name	= "cfb-3des",
		.block_size	= DES_BLOCK_SIZE,
		.enc_type	= (ENC_TYPE_ALG_3DES |
				   ENC_TYPE_CHAINING_CFB),
		.ablkcipher	= {
			.min_keysize	= 3 * DES_KEY_SIZE,
			.max_keysize	= 3 * DES_KEY_SIZE,
			.setkey		= n2_3des_setkey,
			.encrypt	= n2_encrypt_chaining,
			.decrypt	= n2_decrypt_chaining,
		},
	},
	/* AES: ECB CBC and CTR are supported */
	{	.name		= "ecb(aes)",
		.drv_name	= "ecb-aes",
		.block_size	= AES_BLOCK_SIZE,
		.enc_type	= (ENC_TYPE_ALG_AES128 |
				   ENC_TYPE_CHAINING_ECB),
		.ablkcipher	= {
			.min_keysize	= AES_MIN_KEY_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE,
			.setkey		= n2_aes_setkey,
			.encrypt	= n2_encrypt_ecb,
			.decrypt	= n2_decrypt_ecb,
		},
	},
	{	.name		= "cbc(aes)",
		.drv_name	= "cbc-aes",
		.block_size	= AES_BLOCK_SIZE,
		.enc_type	= (ENC_TYPE_ALG_AES128 |
				   ENC_TYPE_CHAINING_CBC),
		.ablkcipher	= {
			.ivsize		= AES_BLOCK_SIZE,
			.min_keysize	= AES_MIN_KEY_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE,
			.setkey		= n2_aes_setkey,
			.encrypt	= n2_encrypt_chaining,
			.decrypt	= n2_decrypt_chaining,
		},
	},
	{	.name		= "ctr(aes)",
		.drv_name	= "ctr-aes",
		.block_size	= AES_BLOCK_SIZE,
		.enc_type	= (ENC_TYPE_ALG_AES128 |
				   ENC_TYPE_CHAINING_COUNTER),
		.ablkcipher	= {
			.ivsize		= AES_BLOCK_SIZE,
			.min_keysize	= AES_MIN_KEY_SIZE,
			.max_keysize	= AES_MAX_KEY_SIZE,
			.setkey		= n2_aes_setkey,
			.encrypt	= n2_encrypt_chaining,
			.decrypt	= n2_encrypt_chaining,
		},
	},

};
#define NUM_CIPHER_TMPLS ARRAY_SIZE(cipher_tmpls)

static LIST_HEAD(cipher_algs);

struct n2_hash_tmpl {
	const char	*name;
	int		(*digest)(struct ahash_request *req);
	u8		digest_size;
	u8		block_size;
};
static const struct n2_hash_tmpl hash_tmpls[] = {
	{ .name		= "md5",
	  .digest	= n2_md5_async_digest,
	  .digest_size	= MD5_DIGEST_SIZE,
	  .block_size	= MD5_HMAC_BLOCK_SIZE },
	{ .name		= "sha1",
	  .digest	= n2_sha1_async_digest,
	  .digest_size	= SHA1_DIGEST_SIZE,
	  .block_size	= SHA1_BLOCK_SIZE },
	{ .name		= "sha256",
	  .digest	= n2_sha256_async_digest,
	  .digest_size	= SHA256_DIGEST_SIZE,
	  .block_size	= SHA256_BLOCK_SIZE },
	{ .name		= "sha224",
	  .digest	= n2_sha224_async_digest,
	  .digest_size	= SHA224_DIGEST_SIZE,
	  .block_size	= SHA224_BLOCK_SIZE },
};
#define NUM_HASH_TMPLS ARRAY_SIZE(hash_tmpls)

struct n2_ahash_alg {
	struct list_head	entry;
	struct ahash_alg	alg;
};
static LIST_HEAD(ahash_algs);

static int algs_registered;

static void __n2_unregister_algs(void)
{
	struct n2_cipher_alg *cipher, *cipher_tmp;
	struct n2_ahash_alg *alg, *alg_tmp;

	list_for_each_entry_safe(cipher, cipher_tmp, &cipher_algs, entry) {
		crypto_unregister_alg(&cipher->alg);
		list_del(&cipher->entry);
		kfree(cipher);
	}
	list_for_each_entry_safe(alg, alg_tmp, &ahash_algs, entry) {
		crypto_unregister_ahash(&alg->alg);
		list_del(&alg->entry);
		kfree(alg);
	}
}

static int n2_cipher_cra_init(struct crypto_tfm *tfm)
{
	tfm->crt_ablkcipher.reqsize = sizeof(struct n2_request_context);
	return 0;
}

static int __devinit __n2_register_one_cipher(const struct n2_cipher_tmpl *tmpl)
{
	struct n2_cipher_alg *p = kzalloc(sizeof(*p), GFP_KERNEL);
	struct crypto_alg *alg;
	int err;

	if (!p)
		return -ENOMEM;

	alg = &p->alg;

	snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", tmpl->name);
	snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s-n2", tmpl->drv_name);
	alg->cra_priority = N2_CRA_PRIORITY;
	alg->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
	alg->cra_blocksize = tmpl->block_size;
	p->enc_type = tmpl->enc_type;
	alg->cra_ctxsize = sizeof(struct n2_cipher_context);
	alg->cra_type = &crypto_ablkcipher_type;
	alg->cra_u.ablkcipher = tmpl->ablkcipher;
	alg->cra_init = n2_cipher_cra_init;
	alg->cra_module = THIS_MODULE;

	list_add(&p->entry, &cipher_algs);
	err = crypto_register_alg(alg);
	if (err) {
		list_del(&p->entry);
		kfree(p);
	}
	return err;
}

static int __devinit __n2_register_one_ahash(const struct n2_hash_tmpl *tmpl)
{
	struct n2_ahash_alg *p = kzalloc(sizeof(*p), GFP_KERNEL);
	struct hash_alg_common *halg;
	struct crypto_alg *base;
	struct ahash_alg *ahash;
	int err;

	if (!p)
		return -ENOMEM;

	ahash = &p->alg;
	ahash->init = n2_hash_async_init;
	ahash->update = n2_hash_async_update;
	ahash->final = n2_hash_async_final;
	ahash->finup = n2_hash_async_finup;
	ahash->digest = tmpl->digest;

	halg = &ahash->halg;
	halg->digestsize = tmpl->digest_size;

	base = &halg->base;
	snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "%s", tmpl->name);
	snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s-n2", tmpl->name);
	base->cra_priority = N2_CRA_PRIORITY;
	base->cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_NEED_FALLBACK;
	base->cra_blocksize = tmpl->block_size;
	base->cra_ctxsize = sizeof(struct n2_hash_ctx);
	base->cra_module = THIS_MODULE;
	base->cra_init = n2_hash_cra_init;
	base->cra_exit = n2_hash_cra_exit;

	list_add(&p->entry, &ahash_algs);
	err = crypto_register_ahash(ahash);
	if (err) {
		list_del(&p->entry);
		kfree(p);
	}
	return err;
}

static int __devinit n2_register_algs(void)
{
	int i, err = 0;

	mutex_lock(&spu_lock);
	if (algs_registered++)
		goto out;

	for (i = 0; i < NUM_HASH_TMPLS; i++) {
		err = __n2_register_one_ahash(&hash_tmpls[i]);
		if (err) {
			__n2_unregister_algs();
			goto out;
		}
	}
	for (i = 0; i < NUM_CIPHER_TMPLS; i++) {
		err = __n2_register_one_cipher(&cipher_tmpls[i]);
		if (err) {
			__n2_unregister_algs();
			goto out;
		}
	}

out:
	mutex_unlock(&spu_lock);
	return err;
}

static void __exit n2_unregister_algs(void)
{
	mutex_lock(&spu_lock);
	if (!--algs_registered)
		__n2_unregister_algs();
	mutex_unlock(&spu_lock);
}

/* To map CWQ queues to interrupt sources, the hypervisor API provides
 * a devino.  This isn't very useful to us because all of the
 * interrupts listed in the of_device node have been translated to
 * Linux virtual IRQ cookie numbers.
 *
 * So we have to back-translate, going through the 'intr' and 'ino'
 * property tables of the n2cp MDESC node, matching it with the OF
 * 'interrupts' property entries, in order to to figure out which
 * devino goes to which already-translated IRQ.
 */
static int find_devino_index(struct of_device *dev, struct spu_mdesc_info *ip,
			     unsigned long dev_ino)
{
	const unsigned int *dev_intrs;
	unsigned int intr;
	int i;

	for (i = 0; i < ip->num_intrs; i++) {
		if (ip->ino_table[i].ino == dev_ino)
			break;
	}
	if (i == ip->num_intrs)
		return -ENODEV;

	intr = ip->ino_table[i].intr;

	dev_intrs = of_get_property(dev->dev.of_node, "interrupts", NULL);
	if (!dev_intrs)
		return -ENODEV;

	for (i = 0; i < dev->num_irqs; i++) {
		if (dev_intrs[i] == intr)
			return i;
	}

	return -ENODEV;
}

static int spu_map_ino(struct of_device *dev, struct spu_mdesc_info *ip,
		       const char *irq_name, struct spu_queue *p,
		       irq_handler_t handler)
{
	unsigned long herr;
	int index;

	herr = sun4v_ncs_qhandle_to_devino(p->qhandle, &p->devino);
	if (herr)
		return -EINVAL;

	index = find_devino_index(dev, ip, p->devino);
	if (index < 0)
		return index;

	p->irq = dev->irqs[index];

	sprintf(p->irq_name, "%s-%d", irq_name, index);

	return request_irq(p->irq, handler, IRQF_SAMPLE_RANDOM,
			   p->irq_name, p);
}

static struct kmem_cache *queue_cache[2];

static void *new_queue(unsigned long q_type)
{
	return kmem_cache_zalloc(queue_cache[q_type - 1], GFP_KERNEL);
}

static void free_queue(void *p, unsigned long q_type)
{
	return kmem_cache_free(queue_cache[q_type - 1], p);
}

static int queue_cache_init(void)
{
	if (!queue_cache[HV_NCS_QTYPE_MAU - 1])
		queue_cache[HV_NCS_QTYPE_MAU - 1] =
			kmem_cache_create("mau_queue",
					  (MAU_NUM_ENTRIES *
					   MAU_ENTRY_SIZE),
					  MAU_ENTRY_SIZE, 0, NULL);
	if (!queue_cache[HV_NCS_QTYPE_MAU - 1])
		return -ENOMEM;

	if (!queue_cache[HV_NCS_QTYPE_CWQ - 1])
		queue_cache[HV_NCS_QTYPE_CWQ - 1] =
			kmem_cache_create("cwq_queue",
					  (CWQ_NUM_ENTRIES *
					   CWQ_ENTRY_SIZE),
					  CWQ_ENTRY_SIZE, 0, NULL);
	if (!queue_cache[HV_NCS_QTYPE_CWQ - 1]) {
		kmem_cache_destroy(queue_cache[HV_NCS_QTYPE_MAU - 1]);
		return -ENOMEM;
	}
	return 0;
}

static void queue_cache_destroy(void)
{
	kmem_cache_destroy(queue_cache[HV_NCS_QTYPE_MAU - 1]);
	kmem_cache_destroy(queue_cache[HV_NCS_QTYPE_CWQ - 1]);
}

static int spu_queue_register(struct spu_queue *p, unsigned long q_type)
{
	cpumask_var_t old_allowed;
	unsigned long hv_ret;

	if (cpumask_empty(&p->sharing))
		return -EINVAL;

	if (!alloc_cpumask_var(&old_allowed, GFP_KERNEL))
		return -ENOMEM;

	cpumask_copy(old_allowed, &current->cpus_allowed);

	set_cpus_allowed_ptr(current, &p->sharing);

	hv_ret = sun4v_ncs_qconf(q_type, __pa(p->q),
				 CWQ_NUM_ENTRIES, &p->qhandle);
	if (!hv_ret)
		sun4v_ncs_sethead_marker(p->qhandle, 0);

	set_cpus_allowed_ptr(current, old_allowed);

	free_cpumask_var(old_allowed);

	return (hv_ret ? -EINVAL : 0);
}

static int spu_queue_setup(struct spu_queue *p)
{
	int err;

	p->q = new_queue(p->q_type);
	if (!p->q)
		return -ENOMEM;

	err = spu_queue_register(p, p->q_type);
	if (err) {
		free_queue(p->q, p->q_type);
		p->q = NULL;
	}

	return err;
}

static void spu_queue_destroy(struct spu_queue *p)
{
	unsigned long hv_ret;

	if (!p->q)
		return;

	hv_ret = sun4v_ncs_qconf(p->q_type, p->qhandle, 0, &p->qhandle);

	if (!hv_ret)
		free_queue(p->q, p->q_type);
}

static void spu_list_destroy(struct list_head *list)
{
	struct spu_queue *p, *n;

	list_for_each_entry_safe(p, n, list, list) {
		int i;

		for (i = 0; i < NR_CPUS; i++) {
			if (cpu_to_cwq[i] == p)
				cpu_to_cwq[i] = NULL;
		}

		if (p->irq) {
			free_irq(p->irq, p);
			p->irq = 0;
		}
		spu_queue_destroy(p);
		list_del(&p->list);
		kfree(p);
	}
}

/* Walk the backward arcs of a CWQ 'exec-unit' node,
 * gathering cpu membership information.
 */
static int spu_mdesc_walk_arcs(struct mdesc_handle *mdesc,
			       struct of_device *dev,
			       u64 node, struct spu_queue *p,
			       struct spu_queue **table)
{
	u64 arc;

	mdesc_for_each_arc(arc, mdesc, node, MDESC_ARC_TYPE_BACK) {
		u64 tgt = mdesc_arc_target(mdesc, arc);
		const char *name = mdesc_node_name(mdesc, tgt);
		const u64 *id;

		if (strcmp(name, "cpu"))
			continue;
		id = mdesc_get_property(mdesc, tgt, "id", NULL);
		if (table[*id] != NULL) {
			dev_err(&dev->dev, "%s: SPU cpu slot already set.\n",
				dev->dev.of_node->full_name);
			return -EINVAL;
		}
		cpu_set(*id, p->sharing);
		table[*id] = p;
	}
	return 0;
}

/* Process an 'exec-unit' MDESC node of type 'cwq'.  */
static int handle_exec_unit(struct spu_mdesc_info *ip, struct list_head *list,
			    struct of_device *dev, struct mdesc_handle *mdesc,
			    u64 node, const char *iname, unsigned long q_type,
			    irq_handler_t handler, struct spu_queue **table)
{
	struct spu_queue *p;
	int err;

	p = kzalloc(sizeof(struct spu_queue), GFP_KERNEL);
	if (!p) {
		dev_err(&dev->dev, "%s: Could not allocate SPU queue.\n",
			dev->dev.of_node->full_name);
		return -ENOMEM;
	}

	cpus_clear(p->sharing);
	spin_lock_init(&p->lock);
	p->q_type = q_type;
	INIT_LIST_HEAD(&p->jobs);
	list_add(&p->list, list);

	err = spu_mdesc_walk_arcs(mdesc, dev, node, p, table);
	if (err)
		return err;

	err = spu_queue_setup(p);
	if (err)
		return err;

	return spu_map_ino(dev, ip, iname, p, handler);
}

static int spu_mdesc_scan(struct mdesc_handle *mdesc, struct of_device *dev,
			  struct spu_mdesc_info *ip, struct list_head *list,
			  const char *exec_name, unsigned long q_type,
			  irq_handler_t handler, struct spu_queue **table)
{
	int err = 0;
	u64 node;

	mdesc_for_each_node_by_name(mdesc, node, "exec-unit") {
		const char *type;

		type = mdesc_get_property(mdesc, node, "type", NULL);
		if (!type || strcmp(type, exec_name))
			continue;

		err = handle_exec_unit(ip, list, dev, mdesc, node,
				       exec_name, q_type, handler, table);
		if (err) {
			spu_list_destroy(list);
			break;
		}
	}

	return err;
}

static int __devinit get_irq_props(struct mdesc_handle *mdesc, u64 node,
				   struct spu_mdesc_info *ip)
{
	const u64 *intr, *ino;
	int intr_len, ino_len;
	int i;

	intr = mdesc_get_property(mdesc, node, "intr", &intr_len);
	if (!intr)
		return -ENODEV;

	ino = mdesc_get_property(mdesc, node, "ino", &ino_len);
	if (!intr)
		return -ENODEV;

	if (intr_len != ino_len)
		return -EINVAL;

	ip->num_intrs = intr_len / sizeof(u64);
	ip->ino_table = kzalloc((sizeof(struct ino_blob) *
				 ip->num_intrs),
				GFP_KERNEL);
	if (!ip->ino_table)
		return -ENOMEM;

	for (i = 0; i < ip->num_intrs; i++) {
		struct ino_blob *b = &ip->ino_table[i];
		b->intr = intr[i];
		b->ino = ino[i];
	}

	return 0;
}

static int __devinit grab_mdesc_irq_props(struct mdesc_handle *mdesc,
					  struct of_device *dev,
					  struct spu_mdesc_info *ip,
					  const char *node_name)
{
	const unsigned int *reg;
	u64 node;

	reg = of_get_property(dev->dev.of_node, "reg", NULL);
	if (!reg)
		return -ENODEV;

	mdesc_for_each_node_by_name(mdesc, node, "virtual-device") {
		const char *name;
		const u64 *chdl;

		name = mdesc_get_property(mdesc, node, "name", NULL);
		if (!name || strcmp(name, node_name))
			continue;
		chdl = mdesc_get_property(mdesc, node, "cfg-handle", NULL);
		if (!chdl || (*chdl != *reg))
			continue;
		ip->cfg_handle = *chdl;
		return get_irq_props(mdesc, node, ip);
	}

	return -ENODEV;
}

static unsigned long n2_spu_hvapi_major;
static unsigned long n2_spu_hvapi_minor;

static int __devinit n2_spu_hvapi_register(void)
{
	int err;

	n2_spu_hvapi_major = 2;
	n2_spu_hvapi_minor = 0;

	err = sun4v_hvapi_register(HV_GRP_NCS,
				   n2_spu_hvapi_major,
				   &n2_spu_hvapi_minor);

	if (!err)
		pr_info("Registered NCS HVAPI version %lu.%lu\n",
			n2_spu_hvapi_major,
			n2_spu_hvapi_minor);

	return err;
}

static void n2_spu_hvapi_unregister(void)
{
	sun4v_hvapi_unregister(HV_GRP_NCS);
}

static int global_ref;

static int __devinit grab_global_resources(void)
{
	int err = 0;

	mutex_lock(&spu_lock);

	if (global_ref++)
		goto out;

	err = n2_spu_hvapi_register();
	if (err)
		goto out;

	err = queue_cache_init();
	if (err)
		goto out_hvapi_release;

	err = -ENOMEM;
	cpu_to_cwq = kzalloc(sizeof(struct spu_queue *) * NR_CPUS,
			     GFP_KERNEL);
	if (!cpu_to_cwq)
		goto out_queue_cache_destroy;

	cpu_to_mau = kzalloc(sizeof(struct spu_queue *) * NR_CPUS,
			     GFP_KERNEL);
	if (!cpu_to_mau)
		goto out_free_cwq_table;

	err = 0;

out:
	if (err)
		global_ref--;
	mutex_unlock(&spu_lock);
	return err;

out_free_cwq_table:
	kfree(cpu_to_cwq);
	cpu_to_cwq = NULL;

out_queue_cache_destroy:
	queue_cache_destroy();

out_hvapi_release:
	n2_spu_hvapi_unregister();
	goto out;
}

static void release_global_resources(void)
{
	mutex_lock(&spu_lock);
	if (!--global_ref) {
		kfree(cpu_to_cwq);
		cpu_to_cwq = NULL;

		kfree(cpu_to_mau);
		cpu_to_mau = NULL;

		queue_cache_destroy();
		n2_spu_hvapi_unregister();
	}
	mutex_unlock(&spu_lock);
}

static struct n2_crypto * __devinit alloc_n2cp(void)
{
	struct n2_crypto *np = kzalloc(sizeof(struct n2_crypto), GFP_KERNEL);

	if (np)
		INIT_LIST_HEAD(&np->cwq_list);

	return np;
}

static void free_n2cp(struct n2_crypto *np)
{
	if (np->cwq_info.ino_table) {
		kfree(np->cwq_info.ino_table);
		np->cwq_info.ino_table = NULL;
	}

	kfree(np);
}

static void __devinit n2_spu_driver_version(void)
{
	static int n2_spu_version_printed;

	if (n2_spu_version_printed++ == 0)
		pr_info("%s", version);
}

static int __devinit n2_crypto_probe(struct of_device *dev,
				     const struct of_device_id *match)
{
	struct mdesc_handle *mdesc;
	const char *full_name;
	struct n2_crypto *np;
	int err;

	n2_spu_driver_version();

	full_name = dev->dev.of_node->full_name;
	pr_info("Found N2CP at %s\n", full_name);

	np = alloc_n2cp();
	if (!np) {
		dev_err(&dev->dev, "%s: Unable to allocate n2cp.\n",
			full_name);
		return -ENOMEM;
	}

	err = grab_global_resources();
	if (err) {
		dev_err(&dev->dev, "%s: Unable to grab "
			"global resources.\n", full_name);
		goto out_free_n2cp;
	}

	mdesc = mdesc_grab();

	if (!mdesc) {
		dev_err(&dev->dev, "%s: Unable to grab MDESC.\n",
			full_name);
		err = -ENODEV;
		goto out_free_global;
	}
	err = grab_mdesc_irq_props(mdesc, dev, &np->cwq_info, "n2cp");
	if (err) {
		dev_err(&dev->dev, "%s: Unable to grab IRQ props.\n",
			full_name);
		mdesc_release(mdesc);
		goto out_free_global;
	}

	err = spu_mdesc_scan(mdesc, dev, &np->cwq_info, &np->cwq_list,
			     "cwq", HV_NCS_QTYPE_CWQ, cwq_intr,
			     cpu_to_cwq);
	mdesc_release(mdesc);

	if (err) {
		dev_err(&dev->dev, "%s: CWQ MDESC scan failed.\n",
			full_name);
		goto out_free_global;
	}

	err = n2_register_algs();
	if (err) {
		dev_err(&dev->dev, "%s: Unable to register algorithms.\n",
			full_name);
		goto out_free_spu_list;
	}

	dev_set_drvdata(&dev->dev, np);

	return 0;

out_free_spu_list:
	spu_list_destroy(&np->cwq_list);

out_free_global:
	release_global_resources();

out_free_n2cp:
	free_n2cp(np);

	return err;
}

static int __devexit n2_crypto_remove(struct of_device *dev)
{
	struct n2_crypto *np = dev_get_drvdata(&dev->dev);

	n2_unregister_algs();

	spu_list_destroy(&np->cwq_list);

	release_global_resources();

	free_n2cp(np);

	return 0;
}

static struct n2_mau * __devinit alloc_ncp(void)
{
	struct n2_mau *mp = kzalloc(sizeof(struct n2_mau), GFP_KERNEL);

	if (mp)
		INIT_LIST_HEAD(&mp->mau_list);

	return mp;
}

static void free_ncp(struct n2_mau *mp)
{
	if (mp->mau_info.ino_table) {
		kfree(mp->mau_info.ino_table);
		mp->mau_info.ino_table = NULL;
	}

	kfree(mp);
}

static int __devinit n2_mau_probe(struct of_device *dev,
				     const struct of_device_id *match)
{
	struct mdesc_handle *mdesc;
	const char *full_name;
	struct n2_mau *mp;
	int err;

	n2_spu_driver_version();

	full_name = dev->dev.of_node->full_name;
	pr_info("Found NCP at %s\n", full_name);

	mp = alloc_ncp();
	if (!mp) {
		dev_err(&dev->dev, "%s: Unable to allocate ncp.\n",
			full_name);
		return -ENOMEM;
	}

	err = grab_global_resources();
	if (err) {
		dev_err(&dev->dev, "%s: Unable to grab "
			"global resources.\n", full_name);
		goto out_free_ncp;
	}

	mdesc = mdesc_grab();

	if (!mdesc) {
		dev_err(&dev->dev, "%s: Unable to grab MDESC.\n",
			full_name);
		err = -ENODEV;
		goto out_free_global;
	}

	err = grab_mdesc_irq_props(mdesc, dev, &mp->mau_info, "ncp");
	if (err) {
		dev_err(&dev->dev, "%s: Unable to grab IRQ props.\n",
			full_name);
		mdesc_release(mdesc);
		goto out_free_global;
	}

	err = spu_mdesc_scan(mdesc, dev, &mp->mau_info, &mp->mau_list,
			     "mau", HV_NCS_QTYPE_MAU, mau_intr,
			     cpu_to_mau);
	mdesc_release(mdesc);

	if (err) {
		dev_err(&dev->dev, "%s: MAU MDESC scan failed.\n",
			full_name);
		goto out_free_global;
	}

	dev_set_drvdata(&dev->dev, mp);

	return 0;

out_free_global:
	release_global_resources();

out_free_ncp:
	free_ncp(mp);

	return err;
}

static int __devexit n2_mau_remove(struct of_device *dev)
{
	struct n2_mau *mp = dev_get_drvdata(&dev->dev);

	spu_list_destroy(&mp->mau_list);

	release_global_resources();

	free_ncp(mp);

	return 0;
}

static struct of_device_id n2_crypto_match[] = {
	{
		.name = "n2cp",
		.compatible = "SUNW,n2-cwq",
	},
	{
		.name = "n2cp",
		.compatible = "SUNW,vf-cwq",
	},
	{},
};

MODULE_DEVICE_TABLE(of, n2_crypto_match);

static struct of_platform_driver n2_crypto_driver = {
	.driver = {
		.name		=	"n2cp",
		.owner		=	THIS_MODULE,
		.of_match_table	=	n2_crypto_match,
	},
	.probe		=	n2_crypto_probe,
	.remove		=	__devexit_p(n2_crypto_remove),
};

static struct of_device_id n2_mau_match[] = {
	{
		.name = "ncp",
		.compatible = "SUNW,n2-mau",
	},
	{
		.name = "ncp",
		.compatible = "SUNW,vf-mau",
	},
	{},
};

MODULE_DEVICE_TABLE(of, n2_mau_match);

static struct of_platform_driver n2_mau_driver = {
	.driver = {
		.name		=	"ncp",
		.owner		=	THIS_MODULE,
		.of_match_table	=	n2_mau_match,
	},
	.probe		=	n2_mau_probe,
	.remove		=	__devexit_p(n2_mau_remove),
};

static int __init n2_init(void)
{
	int err = of_register_driver(&n2_crypto_driver, &of_bus_type);

	if (!err) {
		err = of_register_driver(&n2_mau_driver, &of_bus_type);
		if (err)
			of_unregister_driver(&n2_crypto_driver);
	}
	return err;
}

static void __exit n2_exit(void)
{
	of_unregister_driver(&n2_mau_driver);
	of_unregister_driver(&n2_crypto_driver);
}

module_init(n2_init);
module_exit(n2_exit);