b43: Remove unnecessary MMIO accesses in the interrupt hotpath.
[openwrt.git] / target / linux / generic-2.6 / files / crypto / ocf / cryptodev.h
1 /* $FreeBSD: src/sys/opencrypto/cryptodev.h,v 1.25 2007/05/09 19:37:02 gnn Exp $ */
2 /* $OpenBSD: cryptodev.h,v 1.31 2002/06/11 11:14:29 beck Exp $ */
3
4 /*-
5 * Linux port done by David McCullough <david_mccullough@securecomputing.com>
6 * Copyright (C) 2006-2007 David McCullough
7 * Copyright (C) 2004-2005 Intel Corporation.
8 * The license and original author are listed below.
9 *
10 * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
11 * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
12 *
13 * This code was written by Angelos D. Keromytis in Athens, Greece, in
14 * February 2000. Network Security Technologies Inc. (NSTI) kindly
15 * supported the development of this code.
16 *
17 * Copyright (c) 2000 Angelos D. Keromytis
18 *
19 * Permission to use, copy, and modify this software with or without fee
20 * is hereby granted, provided that this entire notice is included in
21 * all source code copies of any software which is or includes a copy or
22 * modification of this software.
23 *
24 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
25 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
26 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
27 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
28 * PURPOSE.
29 *
30 * Copyright (c) 2001 Theo de Raadt
31 *
32 * Redistribution and use in source and binary forms, with or without
33 * modification, are permitted provided that the following conditions
34 * are met:
35 *
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. The name of the author may not be used to endorse or promote products
42 * derived from this software without specific prior written permission.
43 *
44 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
47 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
48 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
49 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
53 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 *
55 * Effort sponsored in part by the Defense Advanced Research Projects
56 * Agency (DARPA) and Air Force Research Laboratory, Air Force
57 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
58 *
59 */
60
61 #ifndef _CRYPTO_CRYPTO_H_
62 #define _CRYPTO_CRYPTO_H_
63
64 /* Some initial values */
65 #define CRYPTO_DRIVERS_INITIAL 4
66 #define CRYPTO_SW_SESSIONS 32
67
68 /* Hash values */
69 #define NULL_HASH_LEN 0
70 #define MD5_HASH_LEN 16
71 #define SHA1_HASH_LEN 20
72 #define RIPEMD160_HASH_LEN 20
73 #define SHA2_256_HASH_LEN 32
74 #define SHA2_384_HASH_LEN 48
75 #define SHA2_512_HASH_LEN 64
76 #define MD5_KPDK_HASH_LEN 16
77 #define SHA1_KPDK_HASH_LEN 20
78 /* Maximum hash algorithm result length */
79 #define HASH_MAX_LEN SHA2_512_HASH_LEN /* Keep this updated */
80
81 /* HMAC values */
82 #define NULL_HMAC_BLOCK_LEN 1
83 #define MD5_HMAC_BLOCK_LEN 64
84 #define SHA1_HMAC_BLOCK_LEN 64
85 #define RIPEMD160_HMAC_BLOCK_LEN 64
86 #define SHA2_256_HMAC_BLOCK_LEN 64
87 #define SHA2_384_HMAC_BLOCK_LEN 128
88 #define SHA2_512_HMAC_BLOCK_LEN 128
89 /* Maximum HMAC block length */
90 #define HMAC_MAX_BLOCK_LEN SHA2_512_HMAC_BLOCK_LEN /* Keep this updated */
91 #define HMAC_IPAD_VAL 0x36
92 #define HMAC_OPAD_VAL 0x5C
93
94 /* Encryption algorithm block sizes */
95 #define NULL_BLOCK_LEN 1
96 #define DES_BLOCK_LEN 8
97 #define DES3_BLOCK_LEN 8
98 #define BLOWFISH_BLOCK_LEN 8
99 #define SKIPJACK_BLOCK_LEN 8
100 #define CAST128_BLOCK_LEN 8
101 #define RIJNDAEL128_BLOCK_LEN 16
102 #define AES_BLOCK_LEN RIJNDAEL128_BLOCK_LEN
103 #define CAMELLIA_BLOCK_LEN 16
104 #define ARC4_BLOCK_LEN 1
105 #define EALG_MAX_BLOCK_LEN AES_BLOCK_LEN /* Keep this updated */
106
107 /* Encryption algorithm min and max key sizes */
108 #define NULL_MIN_KEY_LEN 0
109 #define NULL_MAX_KEY_LEN 0
110 #define DES_MIN_KEY_LEN 8
111 #define DES_MAX_KEY_LEN 8
112 #define DES3_MIN_KEY_LEN 24
113 #define DES3_MAX_KEY_LEN 24
114 #define BLOWFISH_MIN_KEY_LEN 4
115 #define BLOWFISH_MAX_KEY_LEN 56
116 #define SKIPJACK_MIN_KEY_LEN 10
117 #define SKIPJACK_MAX_KEY_LEN 10
118 #define CAST128_MIN_KEY_LEN 5
119 #define CAST128_MAX_KEY_LEN 16
120 #define RIJNDAEL128_MIN_KEY_LEN 16
121 #define RIJNDAEL128_MAX_KEY_LEN 32
122 #define AES_MIN_KEY_LEN RIJNDAEL128_MIN_KEY_LEN
123 #define AES_MAX_KEY_LEN RIJNDAEL128_MAX_KEY_LEN
124 #define CAMELLIA_MIN_KEY_LEN 16
125 #define CAMELLIA_MAX_KEY_LEN 32
126 #define ARC4_MIN_KEY_LEN 1
127 #define ARC4_MAX_KEY_LEN 256
128
129 /* Max size of data that can be processed */
130 #define CRYPTO_MAX_DATA_LEN 64*1024 - 1
131
132 #define CRYPTO_ALGORITHM_MIN 1
133 #define CRYPTO_DES_CBC 1
134 #define CRYPTO_3DES_CBC 2
135 #define CRYPTO_BLF_CBC 3
136 #define CRYPTO_CAST_CBC 4
137 #define CRYPTO_SKIPJACK_CBC 5
138 #define CRYPTO_MD5_HMAC 6
139 #define CRYPTO_SHA1_HMAC 7
140 #define CRYPTO_RIPEMD160_HMAC 8
141 #define CRYPTO_MD5_KPDK 9
142 #define CRYPTO_SHA1_KPDK 10
143 #define CRYPTO_RIJNDAEL128_CBC 11 /* 128 bit blocksize */
144 #define CRYPTO_AES_CBC 11 /* 128 bit blocksize -- the same as above */
145 #define CRYPTO_ARC4 12
146 #define CRYPTO_MD5 13
147 #define CRYPTO_SHA1 14
148 #define CRYPTO_NULL_HMAC 15
149 #define CRYPTO_NULL_CBC 16
150 #define CRYPTO_DEFLATE_COMP 17 /* Deflate compression algorithm */
151 #define CRYPTO_SHA2_256_HMAC 18
152 #define CRYPTO_SHA2_384_HMAC 19
153 #define CRYPTO_SHA2_512_HMAC 20
154 #define CRYPTO_CAMELLIA_CBC 21
155 #define CRYPTO_SHA2_256 22
156 #define CRYPTO_SHA2_384 23
157 #define CRYPTO_SHA2_512 24
158 #define CRYPTO_RIPEMD160 25
159 #define CRYPTO_ALGORITHM_MAX 25 /* Keep updated - see below */
160
161 /* Algorithm flags */
162 #define CRYPTO_ALG_FLAG_SUPPORTED 0x01 /* Algorithm is supported */
163 #define CRYPTO_ALG_FLAG_RNG_ENABLE 0x02 /* Has HW RNG for DH/DSA */
164 #define CRYPTO_ALG_FLAG_DSA_SHA 0x04 /* Can do SHA on msg */
165
166 /*
167 * Crypto driver/device flags. They can set in the crid
168 * parameter when creating a session or submitting a key
169 * op to affect the device/driver assigned. If neither
170 * of these are specified then the crid is assumed to hold
171 * the driver id of an existing (and suitable) device that
172 * must be used to satisfy the request.
173 */
174 #define CRYPTO_FLAG_HARDWARE 0x01000000 /* hardware accelerated */
175 #define CRYPTO_FLAG_SOFTWARE 0x02000000 /* software implementation */
176
177 /* NB: deprecated */
178 struct session_op {
179 u_int32_t cipher; /* ie. CRYPTO_DES_CBC */
180 u_int32_t mac; /* ie. CRYPTO_MD5_HMAC */
181
182 u_int32_t keylen; /* cipher key */
183 caddr_t key;
184 int mackeylen; /* mac key */
185 caddr_t mackey;
186
187 u_int32_t ses; /* returns: session # */
188 };
189
190 struct session2_op {
191 u_int32_t cipher; /* ie. CRYPTO_DES_CBC */
192 u_int32_t mac; /* ie. CRYPTO_MD5_HMAC */
193
194 u_int32_t keylen; /* cipher key */
195 caddr_t key;
196 int mackeylen; /* mac key */
197 caddr_t mackey;
198
199 u_int32_t ses; /* returns: session # */
200 int crid; /* driver id + flags (rw) */
201 int pad[4]; /* for future expansion */
202 };
203
204 struct crypt_op {
205 u_int32_t ses;
206 u_int16_t op; /* i.e. COP_ENCRYPT */
207 #define COP_NONE 0
208 #define COP_ENCRYPT 1
209 #define COP_DECRYPT 2
210 u_int16_t flags;
211 #define COP_F_BATCH 0x0008 /* Batch op if possible */
212 u_int len;
213 caddr_t src, dst; /* become iov[] inside kernel */
214 caddr_t mac; /* must be big enough for chosen MAC */
215 caddr_t iv;
216 };
217
218 /*
219 * Parameters for looking up a crypto driver/device by
220 * device name or by id. The latter are returned for
221 * created sessions (crid) and completed key operations.
222 */
223 struct crypt_find_op {
224 int crid; /* driver id + flags */
225 char name[32]; /* device/driver name */
226 };
227
228 /* bignum parameter, in packed bytes, ... */
229 struct crparam {
230 caddr_t crp_p;
231 u_int crp_nbits;
232 };
233
234 #define CRK_MAXPARAM 8
235
236 struct crypt_kop {
237 u_int crk_op; /* ie. CRK_MOD_EXP or other */
238 u_int crk_status; /* return status */
239 u_short crk_iparams; /* # of input parameters */
240 u_short crk_oparams; /* # of output parameters */
241 u_int crk_crid; /* NB: only used by CIOCKEY2 (rw) */
242 struct crparam crk_param[CRK_MAXPARAM];
243 };
244 #define CRK_ALGORITM_MIN 0
245 #define CRK_MOD_EXP 0
246 #define CRK_MOD_EXP_CRT 1
247 #define CRK_DSA_SIGN 2
248 #define CRK_DSA_VERIFY 3
249 #define CRK_DH_COMPUTE_KEY 4
250 #define CRK_ALGORITHM_MAX 4 /* Keep updated - see below */
251
252 #define CRF_MOD_EXP (1 << CRK_MOD_EXP)
253 #define CRF_MOD_EXP_CRT (1 << CRK_MOD_EXP_CRT)
254 #define CRF_DSA_SIGN (1 << CRK_DSA_SIGN)
255 #define CRF_DSA_VERIFY (1 << CRK_DSA_VERIFY)
256 #define CRF_DH_COMPUTE_KEY (1 << CRK_DH_COMPUTE_KEY)
257
258 /*
259 * done against open of /dev/crypto, to get a cloned descriptor.
260 * Please use F_SETFD against the cloned descriptor.
261 */
262 #define CRIOGET _IOWR('c', 100, u_int32_t)
263 #define CRIOASYMFEAT CIOCASYMFEAT
264 #define CRIOFINDDEV CIOCFINDDEV
265
266 /* the following are done against the cloned descriptor */
267 #define CIOCGSESSION _IOWR('c', 101, struct session_op)
268 #define CIOCFSESSION _IOW('c', 102, u_int32_t)
269 #define CIOCCRYPT _IOWR('c', 103, struct crypt_op)
270 #define CIOCKEY _IOWR('c', 104, struct crypt_kop)
271 #define CIOCASYMFEAT _IOR('c', 105, u_int32_t)
272 #define CIOCGSESSION2 _IOWR('c', 106, struct session2_op)
273 #define CIOCKEY2 _IOWR('c', 107, struct crypt_kop)
274 #define CIOCFINDDEV _IOWR('c', 108, struct crypt_find_op)
275
276 struct cryptotstat {
277 struct timespec acc; /* total accumulated time */
278 struct timespec min; /* min time */
279 struct timespec max; /* max time */
280 u_int32_t count; /* number of observations */
281 };
282
283 struct cryptostats {
284 u_int32_t cs_ops; /* symmetric crypto ops submitted */
285 u_int32_t cs_errs; /* symmetric crypto ops that failed */
286 u_int32_t cs_kops; /* asymetric/key ops submitted */
287 u_int32_t cs_kerrs; /* asymetric/key ops that failed */
288 u_int32_t cs_intrs; /* crypto swi thread activations */
289 u_int32_t cs_rets; /* crypto return thread activations */
290 u_int32_t cs_blocks; /* symmetric op driver block */
291 u_int32_t cs_kblocks; /* symmetric op driver block */
292 /*
293 * When CRYPTO_TIMING is defined at compile time and the
294 * sysctl debug.crypto is set to 1, the crypto system will
295 * accumulate statistics about how long it takes to process
296 * crypto requests at various points during processing.
297 */
298 struct cryptotstat cs_invoke; /* crypto_dipsatch -> crypto_invoke */
299 struct cryptotstat cs_done; /* crypto_invoke -> crypto_done */
300 struct cryptotstat cs_cb; /* crypto_done -> callback */
301 struct cryptotstat cs_finis; /* callback -> callback return */
302
303 u_int32_t cs_drops; /* crypto ops dropped due to congestion */
304 };
305
306 #ifdef __KERNEL__
307
308 /* Standard initialization structure beginning */
309 struct cryptoini {
310 int cri_alg; /* Algorithm to use */
311 int cri_klen; /* Key length, in bits */
312 int cri_mlen; /* Number of bytes we want from the
313 entire hash. 0 means all. */
314 caddr_t cri_key; /* key to use */
315 u_int8_t cri_iv[EALG_MAX_BLOCK_LEN]; /* IV to use */
316 struct cryptoini *cri_next;
317 };
318
319 /* Describe boundaries of a single crypto operation */
320 struct cryptodesc {
321 int crd_skip; /* How many bytes to ignore from start */
322 int crd_len; /* How many bytes to process */
323 int crd_inject; /* Where to inject results, if applicable */
324 int crd_flags;
325
326 #define CRD_F_ENCRYPT 0x01 /* Set when doing encryption */
327 #define CRD_F_IV_PRESENT 0x02 /* When encrypting, IV is already in
328 place, so don't copy. */
329 #define CRD_F_IV_EXPLICIT 0x04 /* IV explicitly provided */
330 #define CRD_F_DSA_SHA_NEEDED 0x08 /* Compute SHA-1 of buffer for DSA */
331 #define CRD_F_KEY_EXPLICIT 0x10 /* Key explicitly provided */
332 #define CRD_F_COMP 0x0f /* Set when doing compression */
333
334 struct cryptoini CRD_INI; /* Initialization/context data */
335 #define crd_iv CRD_INI.cri_iv
336 #define crd_key CRD_INI.cri_key
337 #define crd_alg CRD_INI.cri_alg
338 #define crd_klen CRD_INI.cri_klen
339
340 struct cryptodesc *crd_next;
341 };
342
343 /* Structure describing complete operation */
344 struct cryptop {
345 struct list_head crp_next;
346 wait_queue_head_t crp_waitq;
347
348 u_int64_t crp_sid; /* Session ID */
349 int crp_ilen; /* Input data total length */
350 int crp_olen; /* Result total length */
351
352 int crp_etype; /*
353 * Error type (zero means no error).
354 * All error codes except EAGAIN
355 * indicate possible data corruption (as in,
356 * the data have been touched). On all
357 * errors, the crp_sid may have changed
358 * (reset to a new one), so the caller
359 * should always check and use the new
360 * value on future requests.
361 */
362 int crp_flags;
363
364 #define CRYPTO_F_SKBUF 0x0001 /* Input/output are skbuf chains */
365 #define CRYPTO_F_IOV 0x0002 /* Input/output are uio */
366 #define CRYPTO_F_REL 0x0004 /* Must return data in same place */
367 #define CRYPTO_F_BATCH 0x0008 /* Batch op if possible */
368 #define CRYPTO_F_CBIMM 0x0010 /* Do callback immediately */
369 #define CRYPTO_F_DONE 0x0020 /* Operation completed */
370 #define CRYPTO_F_CBIFSYNC 0x0040 /* Do CBIMM if op is synchronous */
371
372 caddr_t crp_buf; /* Data to be processed */
373 caddr_t crp_opaque; /* Opaque pointer, passed along */
374 struct cryptodesc *crp_desc; /* Linked list of processing descriptors */
375
376 int (*crp_callback)(struct cryptop *); /* Callback function */
377 };
378
379 #define CRYPTO_BUF_CONTIG 0x0
380 #define CRYPTO_BUF_IOV 0x1
381 #define CRYPTO_BUF_SKBUF 0x2
382
383 #define CRYPTO_OP_DECRYPT 0x0
384 #define CRYPTO_OP_ENCRYPT 0x1
385
386 /*
387 * Hints passed to process methods.
388 */
389 #define CRYPTO_HINT_MORE 0x1 /* more ops coming shortly */
390
391 struct cryptkop {
392 struct list_head krp_next;
393 wait_queue_head_t krp_waitq;
394
395 int krp_flags;
396 #define CRYPTO_KF_DONE 0x0001 /* Operation completed */
397 #define CRYPTO_KF_CBIMM 0x0002 /* Do callback immediately */
398
399 u_int krp_op; /* ie. CRK_MOD_EXP or other */
400 u_int krp_status; /* return status */
401 u_short krp_iparams; /* # of input parameters */
402 u_short krp_oparams; /* # of output parameters */
403 u_int krp_crid; /* desired device, etc. */
404 u_int32_t krp_hid;
405 struct crparam krp_param[CRK_MAXPARAM]; /* kvm */
406 int (*krp_callback)(struct cryptkop *);
407 };
408
409 #include <ocf-compat.h>
410
411 /*
412 * Session ids are 64 bits. The lower 32 bits contain a "local id" which
413 * is a driver-private session identifier. The upper 32 bits contain a
414 * "hardware id" used by the core crypto code to identify the driver and
415 * a copy of the driver's capabilities that can be used by client code to
416 * optimize operation.
417 */
418 #define CRYPTO_SESID2HID(_sid) (((_sid) >> 32) & 0x00ffffff)
419 #define CRYPTO_SESID2CAPS(_sid) (((_sid) >> 32) & 0xff000000)
420 #define CRYPTO_SESID2LID(_sid) (((u_int32_t) (_sid)) & 0xffffffff)
421
422 extern int crypto_newsession(u_int64_t *sid, struct cryptoini *cri, int hard);
423 extern int crypto_freesession(u_int64_t sid);
424 #define CRYPTOCAP_F_HARDWARE CRYPTO_FLAG_HARDWARE
425 #define CRYPTOCAP_F_SOFTWARE CRYPTO_FLAG_SOFTWARE
426 #define CRYPTOCAP_F_SYNC 0x04000000 /* operates synchronously */
427 extern int32_t crypto_get_driverid(device_t dev, int flags);
428 extern int crypto_find_driver(const char *);
429 extern device_t crypto_find_device_byhid(int hid);
430 extern int crypto_getcaps(int hid);
431 extern int crypto_register(u_int32_t driverid, int alg, u_int16_t maxoplen,
432 u_int32_t flags);
433 extern int crypto_kregister(u_int32_t, int, u_int32_t);
434 extern int crypto_unregister(u_int32_t driverid, int alg);
435 extern int crypto_unregister_all(u_int32_t driverid);
436 extern int crypto_dispatch(struct cryptop *crp);
437 extern int crypto_kdispatch(struct cryptkop *);
438 #define CRYPTO_SYMQ 0x1
439 #define CRYPTO_ASYMQ 0x2
440 extern int crypto_unblock(u_int32_t, int);
441 extern void crypto_done(struct cryptop *crp);
442 extern void crypto_kdone(struct cryptkop *);
443 extern int crypto_getfeat(int *);
444
445 extern void crypto_freereq(struct cryptop *crp);
446 extern struct cryptop *crypto_getreq(int num);
447
448 extern int crypto_usercrypto; /* userland may do crypto requests */
449 extern int crypto_userasymcrypto; /* userland may do asym crypto reqs */
450 extern int crypto_devallowsoft; /* only use hardware crypto */
451
452 /*
453 * random number support, crypto_unregister_all will unregister
454 */
455 extern int crypto_rregister(u_int32_t driverid,
456 int (*read_random)(void *arg, u_int32_t *buf, int len), void *arg);
457 extern int crypto_runregister_all(u_int32_t driverid);
458
459 /*
460 * Crypto-related utility routines used mainly by drivers.
461 *
462 * XXX these don't really belong here; but for now they're
463 * kept apart from the rest of the system.
464 */
465 struct uio;
466 extern void cuio_copydata(struct uio* uio, int off, int len, caddr_t cp);
467 extern void cuio_copyback(struct uio* uio, int off, int len, caddr_t cp);
468 extern struct iovec *cuio_getptr(struct uio *uio, int loc, int *off);
469
470 extern void crypto_copyback(int flags, caddr_t buf, int off, int size,
471 caddr_t in);
472 extern void crypto_copydata(int flags, caddr_t buf, int off, int size,
473 caddr_t out);
474 extern int crypto_apply(int flags, caddr_t buf, int off, int len,
475 int (*f)(void *, void *, u_int), void *arg);
476
477 #endif /* __KERNEL__ */
478 #endif /* _CRYPTO_CRYPTO_H_ */
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