1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * AMD Cryptographic Coprocessor (CCP) driver
4 *
5 * Copyright (C) 2013,2017 Advanced Micro Devices, Inc.
6 *
7 * Author: Tom Lendacky <thomas.lendacky@amd.com>
8 * Author: Gary R Hook <gary.hook@amd.com>
9 */
10
11 #ifndef __CCP_H__
12 #define __CCP_H__
13
14 #include <linux/scatterlist.h>
15 #include <linux/workqueue.h>
16 #include <linux/list.h>
17 #include <crypto/aes.h>
18 #include <crypto/sha1.h>
19 #include <crypto/sha2.h>
20
21 struct ccp_device;
22 struct ccp_cmd;
23
24 #if defined(CONFIG_CRYPTO_DEV_SP_CCP)
25
26 /**
27 * ccp_present - check if a CCP device is present
28 *
29 * Returns zero if a CCP device is present, -ENODEV otherwise.
30 */
31 int ccp_present(void);
32
33 #define CCP_VSIZE 16
34 #define CCP_VMASK ((unsigned int)((1 << CCP_VSIZE) - 1))
35 #define CCP_VERSION(v, r) ((unsigned int)((v << CCP_VSIZE) \
36 | (r & CCP_VMASK)))
37
38 /**
39 * ccp_version - get the version of the CCP
40 *
41 * Returns a positive version number, or zero if no CCP
42 */
43 unsigned int ccp_version(void);
44
45 /**
46 * ccp_enqueue_cmd - queue an operation for processing by the CCP
47 *
48 * @cmd: ccp_cmd struct to be processed
49 *
50 * Refer to the ccp_cmd struct below for required fields.
51 *
52 * Queue a cmd to be processed by the CCP. If queueing the cmd
53 * would exceed the defined length of the cmd queue the cmd will
54 * only be queued if the CCP_CMD_MAY_BACKLOG flag is set and will
55 * result in a return code of -EBUSY.
56 *
57 * The callback routine specified in the ccp_cmd struct will be
58 * called to notify the caller of completion (if the cmd was not
59 * backlogged) or advancement out of the backlog. If the cmd has
60 * advanced out of the backlog the "err" value of the callback
61 * will be -EINPROGRESS. Any other "err" value during callback is
62 * the result of the operation.
63 *
64 * The cmd has been successfully queued if:
65 * the return code is -EINPROGRESS or
66 * the return code is -EBUSY and CCP_CMD_MAY_BACKLOG flag is set
67 */
68 int ccp_enqueue_cmd(struct ccp_cmd *cmd);
69
70 #else /* CONFIG_CRYPTO_DEV_CCP_SP_DEV is not enabled */
71
ccp_present(void)72 static inline int ccp_present(void)
73 {
74 return -ENODEV;
75 }
76
ccp_version(void)77 static inline unsigned int ccp_version(void)
78 {
79 return 0;
80 }
81
ccp_enqueue_cmd(struct ccp_cmd * cmd)82 static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd)
83 {
84 return -ENODEV;
85 }
86
87 #endif /* CONFIG_CRYPTO_DEV_SP_CCP */
88
89
90 /***** AES engine *****/
91 /**
92 * ccp_aes_type - AES key size
93 *
94 * @CCP_AES_TYPE_128: 128-bit key
95 * @CCP_AES_TYPE_192: 192-bit key
96 * @CCP_AES_TYPE_256: 256-bit key
97 */
98 enum ccp_aes_type {
99 CCP_AES_TYPE_128 = 0,
100 CCP_AES_TYPE_192,
101 CCP_AES_TYPE_256,
102 CCP_AES_TYPE__LAST,
103 };
104
105 /**
106 * ccp_aes_mode - AES operation mode
107 *
108 * @CCP_AES_MODE_ECB: ECB mode
109 * @CCP_AES_MODE_CBC: CBC mode
110 * @CCP_AES_MODE_OFB: OFB mode
111 * @CCP_AES_MODE_CFB: CFB mode
112 * @CCP_AES_MODE_CTR: CTR mode
113 * @CCP_AES_MODE_CMAC: CMAC mode
114 */
115 enum ccp_aes_mode {
116 CCP_AES_MODE_ECB = 0,
117 CCP_AES_MODE_CBC,
118 CCP_AES_MODE_OFB,
119 CCP_AES_MODE_CFB,
120 CCP_AES_MODE_CTR,
121 CCP_AES_MODE_CMAC,
122 CCP_AES_MODE_GHASH,
123 CCP_AES_MODE_GCTR,
124 CCP_AES_MODE_GCM,
125 CCP_AES_MODE_GMAC,
126 CCP_AES_MODE__LAST,
127 };
128
129 /**
130 * ccp_aes_mode - AES operation mode
131 *
132 * @CCP_AES_ACTION_DECRYPT: AES decrypt operation
133 * @CCP_AES_ACTION_ENCRYPT: AES encrypt operation
134 */
135 enum ccp_aes_action {
136 CCP_AES_ACTION_DECRYPT = 0,
137 CCP_AES_ACTION_ENCRYPT,
138 CCP_AES_ACTION__LAST,
139 };
140 /* Overloaded field */
141 #define CCP_AES_GHASHAAD CCP_AES_ACTION_DECRYPT
142 #define CCP_AES_GHASHFINAL CCP_AES_ACTION_ENCRYPT
143
144 /**
145 * struct ccp_aes_engine - CCP AES operation
146 * @type: AES operation key size
147 * @mode: AES operation mode
148 * @action: AES operation (decrypt/encrypt)
149 * @key: key to be used for this AES operation
150 * @key_len: length in bytes of key
151 * @iv: IV to be used for this AES operation
152 * @iv_len: length in bytes of iv
153 * @src: data to be used for this operation
154 * @dst: data produced by this operation
155 * @src_len: length in bytes of data used for this operation
156 * @cmac_final: indicates final operation when running in CMAC mode
157 * @cmac_key: K1/K2 key used in final CMAC operation
158 * @cmac_key_len: length in bytes of cmac_key
159 *
160 * Variables required to be set when calling ccp_enqueue_cmd():
161 * - type, mode, action, key, key_len, src, dst, src_len
162 * - iv, iv_len for any mode other than ECB
163 * - cmac_final for CMAC mode
164 * - cmac_key, cmac_key_len for CMAC mode if cmac_final is non-zero
165 *
166 * The iv variable is used as both input and output. On completion of the
167 * AES operation the new IV overwrites the old IV.
168 */
169 struct ccp_aes_engine {
170 enum ccp_aes_type type;
171 enum ccp_aes_mode mode;
172 enum ccp_aes_action action;
173
174 u32 authsize;
175
176 struct scatterlist *key;
177 u32 key_len; /* In bytes */
178
179 struct scatterlist *iv;
180 u32 iv_len; /* In bytes */
181
182 struct scatterlist *src, *dst;
183 u64 src_len; /* In bytes */
184
185 u32 cmac_final; /* Indicates final cmac cmd */
186 struct scatterlist *cmac_key; /* K1/K2 cmac key required for
187 * final cmac cmd */
188 u32 cmac_key_len; /* In bytes */
189
190 u32 aad_len; /* In bytes */
191 };
192
193 /***** XTS-AES engine *****/
194 /**
195 * ccp_xts_aes_unit_size - XTS unit size
196 *
197 * @CCP_XTS_AES_UNIT_SIZE_16: Unit size of 16 bytes
198 * @CCP_XTS_AES_UNIT_SIZE_512: Unit size of 512 bytes
199 * @CCP_XTS_AES_UNIT_SIZE_1024: Unit size of 1024 bytes
200 * @CCP_XTS_AES_UNIT_SIZE_2048: Unit size of 2048 bytes
201 * @CCP_XTS_AES_UNIT_SIZE_4096: Unit size of 4096 bytes
202 */
203 enum ccp_xts_aes_unit_size {
204 CCP_XTS_AES_UNIT_SIZE_16 = 0,
205 CCP_XTS_AES_UNIT_SIZE_512,
206 CCP_XTS_AES_UNIT_SIZE_1024,
207 CCP_XTS_AES_UNIT_SIZE_2048,
208 CCP_XTS_AES_UNIT_SIZE_4096,
209 CCP_XTS_AES_UNIT_SIZE__LAST,
210 };
211
212 /**
213 * struct ccp_xts_aes_engine - CCP XTS AES operation
214 * @action: AES operation (decrypt/encrypt)
215 * @unit_size: unit size of the XTS operation
216 * @key: key to be used for this XTS AES operation
217 * @key_len: length in bytes of key
218 * @iv: IV to be used for this XTS AES operation
219 * @iv_len: length in bytes of iv
220 * @src: data to be used for this operation
221 * @dst: data produced by this operation
222 * @src_len: length in bytes of data used for this operation
223 * @final: indicates final XTS operation
224 *
225 * Variables required to be set when calling ccp_enqueue_cmd():
226 * - action, unit_size, key, key_len, iv, iv_len, src, dst, src_len, final
227 *
228 * The iv variable is used as both input and output. On completion of the
229 * AES operation the new IV overwrites the old IV.
230 */
231 struct ccp_xts_aes_engine {
232 enum ccp_aes_type type;
233 enum ccp_aes_action action;
234 enum ccp_xts_aes_unit_size unit_size;
235
236 struct scatterlist *key;
237 u32 key_len; /* In bytes */
238
239 struct scatterlist *iv;
240 u32 iv_len; /* In bytes */
241
242 struct scatterlist *src, *dst;
243 u64 src_len; /* In bytes */
244
245 u32 final;
246 };
247
248 /***** SHA engine *****/
249 /**
250 * ccp_sha_type - type of SHA operation
251 *
252 * @CCP_SHA_TYPE_1: SHA-1 operation
253 * @CCP_SHA_TYPE_224: SHA-224 operation
254 * @CCP_SHA_TYPE_256: SHA-256 operation
255 */
256 enum ccp_sha_type {
257 CCP_SHA_TYPE_1 = 1,
258 CCP_SHA_TYPE_224,
259 CCP_SHA_TYPE_256,
260 CCP_SHA_TYPE_384,
261 CCP_SHA_TYPE_512,
262 CCP_SHA_TYPE__LAST,
263 };
264
265 /**
266 * struct ccp_sha_engine - CCP SHA operation
267 * @type: Type of SHA operation
268 * @ctx: current hash value
269 * @ctx_len: length in bytes of hash value
270 * @src: data to be used for this operation
271 * @src_len: length in bytes of data used for this operation
272 * @opad: data to be used for final HMAC operation
273 * @opad_len: length in bytes of data used for final HMAC operation
274 * @first: indicates first SHA operation
275 * @final: indicates final SHA operation
276 * @msg_bits: total length of the message in bits used in final SHA operation
277 *
278 * Variables required to be set when calling ccp_enqueue_cmd():
279 * - type, ctx, ctx_len, src, src_len, final
280 * - msg_bits if final is non-zero
281 *
282 * The ctx variable is used as both input and output. On completion of the
283 * SHA operation the new hash value overwrites the old hash value.
284 */
285 struct ccp_sha_engine {
286 enum ccp_sha_type type;
287
288 struct scatterlist *ctx;
289 u32 ctx_len; /* In bytes */
290
291 struct scatterlist *src;
292 u64 src_len; /* In bytes */
293
294 struct scatterlist *opad;
295 u32 opad_len; /* In bytes */
296
297 u32 first; /* Indicates first sha cmd */
298 u32 final; /* Indicates final sha cmd */
299 u64 msg_bits; /* Message length in bits required for
300 * final sha cmd */
301 };
302
303 /***** 3DES engine *****/
304 enum ccp_des3_mode {
305 CCP_DES3_MODE_ECB = 0,
306 CCP_DES3_MODE_CBC,
307 CCP_DES3_MODE_CFB,
308 CCP_DES3_MODE__LAST,
309 };
310
311 enum ccp_des3_type {
312 CCP_DES3_TYPE_168 = 1,
313 CCP_DES3_TYPE__LAST,
314 };
315
316 enum ccp_des3_action {
317 CCP_DES3_ACTION_DECRYPT = 0,
318 CCP_DES3_ACTION_ENCRYPT,
319 CCP_DES3_ACTION__LAST,
320 };
321
322 /**
323 * struct ccp_des3_engine - CCP SHA operation
324 * @type: Type of 3DES operation
325 * @mode: cipher mode
326 * @action: 3DES operation (decrypt/encrypt)
327 * @key: key to be used for this 3DES operation
328 * @key_len: length of key (in bytes)
329 * @iv: IV to be used for this AES operation
330 * @iv_len: length in bytes of iv
331 * @src: input data to be used for this operation
332 * @src_len: length of input data used for this operation (in bytes)
333 * @dst: output data produced by this operation
334 *
335 * Variables required to be set when calling ccp_enqueue_cmd():
336 * - type, mode, action, key, key_len, src, dst, src_len
337 * - iv, iv_len for any mode other than ECB
338 *
339 * The iv variable is used as both input and output. On completion of the
340 * 3DES operation the new IV overwrites the old IV.
341 */
342 struct ccp_des3_engine {
343 enum ccp_des3_type type;
344 enum ccp_des3_mode mode;
345 enum ccp_des3_action action;
346
347 struct scatterlist *key;
348 u32 key_len; /* In bytes */
349
350 struct scatterlist *iv;
351 u32 iv_len; /* In bytes */
352
353 struct scatterlist *src, *dst;
354 u64 src_len; /* In bytes */
355 };
356
357 /***** RSA engine *****/
358 /**
359 * struct ccp_rsa_engine - CCP RSA operation
360 * @key_size: length in bits of RSA key
361 * @exp: RSA exponent
362 * @exp_len: length in bytes of exponent
363 * @mod: RSA modulus
364 * @mod_len: length in bytes of modulus
365 * @src: data to be used for this operation
366 * @dst: data produced by this operation
367 * @src_len: length in bytes of data used for this operation
368 *
369 * Variables required to be set when calling ccp_enqueue_cmd():
370 * - key_size, exp, exp_len, mod, mod_len, src, dst, src_len
371 */
372 struct ccp_rsa_engine {
373 u32 key_size; /* In bits */
374
375 struct scatterlist *exp;
376 u32 exp_len; /* In bytes */
377
378 struct scatterlist *mod;
379 u32 mod_len; /* In bytes */
380
381 struct scatterlist *src, *dst;
382 u32 src_len; /* In bytes */
383 };
384
385 /***** Passthru engine *****/
386 /**
387 * ccp_passthru_bitwise - type of bitwise passthru operation
388 *
389 * @CCP_PASSTHRU_BITWISE_NOOP: no bitwise operation performed
390 * @CCP_PASSTHRU_BITWISE_AND: perform bitwise AND of src with mask
391 * @CCP_PASSTHRU_BITWISE_OR: perform bitwise OR of src with mask
392 * @CCP_PASSTHRU_BITWISE_XOR: perform bitwise XOR of src with mask
393 * @CCP_PASSTHRU_BITWISE_MASK: overwrite with mask
394 */
395 enum ccp_passthru_bitwise {
396 CCP_PASSTHRU_BITWISE_NOOP = 0,
397 CCP_PASSTHRU_BITWISE_AND,
398 CCP_PASSTHRU_BITWISE_OR,
399 CCP_PASSTHRU_BITWISE_XOR,
400 CCP_PASSTHRU_BITWISE_MASK,
401 CCP_PASSTHRU_BITWISE__LAST,
402 };
403
404 /**
405 * ccp_passthru_byteswap - type of byteswap passthru operation
406 *
407 * @CCP_PASSTHRU_BYTESWAP_NOOP: no byte swapping performed
408 * @CCP_PASSTHRU_BYTESWAP_32BIT: swap bytes within 32-bit words
409 * @CCP_PASSTHRU_BYTESWAP_256BIT: swap bytes within 256-bit words
410 */
411 enum ccp_passthru_byteswap {
412 CCP_PASSTHRU_BYTESWAP_NOOP = 0,
413 CCP_PASSTHRU_BYTESWAP_32BIT,
414 CCP_PASSTHRU_BYTESWAP_256BIT,
415 CCP_PASSTHRU_BYTESWAP__LAST,
416 };
417
418 /**
419 * struct ccp_passthru_engine - CCP pass-through operation
420 * @bit_mod: bitwise operation to perform
421 * @byte_swap: byteswap operation to perform
422 * @mask: mask to be applied to data
423 * @mask_len: length in bytes of mask
424 * @src: data to be used for this operation
425 * @dst: data produced by this operation
426 * @src_len: length in bytes of data used for this operation
427 * @final: indicate final pass-through operation
428 *
429 * Variables required to be set when calling ccp_enqueue_cmd():
430 * - bit_mod, byte_swap, src, dst, src_len
431 * - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP
432 */
433 struct ccp_passthru_engine {
434 enum ccp_passthru_bitwise bit_mod;
435 enum ccp_passthru_byteswap byte_swap;
436
437 struct scatterlist *mask;
438 u32 mask_len; /* In bytes */
439
440 struct scatterlist *src, *dst;
441 u64 src_len; /* In bytes */
442
443 u32 final;
444 };
445
446 /**
447 * struct ccp_passthru_nomap_engine - CCP pass-through operation
448 * without performing DMA mapping
449 * @bit_mod: bitwise operation to perform
450 * @byte_swap: byteswap operation to perform
451 * @mask: mask to be applied to data
452 * @mask_len: length in bytes of mask
453 * @src: data to be used for this operation
454 * @dst: data produced by this operation
455 * @src_len: length in bytes of data used for this operation
456 * @final: indicate final pass-through operation
457 *
458 * Variables required to be set when calling ccp_enqueue_cmd():
459 * - bit_mod, byte_swap, src, dst, src_len
460 * - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP
461 */
462 struct ccp_passthru_nomap_engine {
463 enum ccp_passthru_bitwise bit_mod;
464 enum ccp_passthru_byteswap byte_swap;
465
466 dma_addr_t mask;
467 u32 mask_len; /* In bytes */
468
469 dma_addr_t src_dma, dst_dma;
470 u64 src_len; /* In bytes */
471
472 u32 final;
473 };
474
475 /***** ECC engine *****/
476 #define CCP_ECC_MODULUS_BYTES 48 /* 384-bits */
477 #define CCP_ECC_MAX_OPERANDS 6
478 #define CCP_ECC_MAX_OUTPUTS 3
479
480 /**
481 * ccp_ecc_function - type of ECC function
482 *
483 * @CCP_ECC_FUNCTION_MMUL_384BIT: 384-bit modular multiplication
484 * @CCP_ECC_FUNCTION_MADD_384BIT: 384-bit modular addition
485 * @CCP_ECC_FUNCTION_MINV_384BIT: 384-bit multiplicative inverse
486 * @CCP_ECC_FUNCTION_PADD_384BIT: 384-bit point addition
487 * @CCP_ECC_FUNCTION_PMUL_384BIT: 384-bit point multiplication
488 * @CCP_ECC_FUNCTION_PDBL_384BIT: 384-bit point doubling
489 */
490 enum ccp_ecc_function {
491 CCP_ECC_FUNCTION_MMUL_384BIT = 0,
492 CCP_ECC_FUNCTION_MADD_384BIT,
493 CCP_ECC_FUNCTION_MINV_384BIT,
494 CCP_ECC_FUNCTION_PADD_384BIT,
495 CCP_ECC_FUNCTION_PMUL_384BIT,
496 CCP_ECC_FUNCTION_PDBL_384BIT,
497 };
498
499 /**
500 * struct ccp_ecc_modular_math - CCP ECC modular math parameters
501 * @operand_1: first operand for the modular math operation
502 * @operand_1_len: length of the first operand
503 * @operand_2: second operand for the modular math operation
504 * (not used for CCP_ECC_FUNCTION_MINV_384BIT)
505 * @operand_2_len: length of the second operand
506 * (not used for CCP_ECC_FUNCTION_MINV_384BIT)
507 * @result: result of the modular math operation
508 * @result_len: length of the supplied result buffer
509 */
510 struct ccp_ecc_modular_math {
511 struct scatterlist *operand_1;
512 unsigned int operand_1_len; /* In bytes */
513
514 struct scatterlist *operand_2;
515 unsigned int operand_2_len; /* In bytes */
516
517 struct scatterlist *result;
518 unsigned int result_len; /* In bytes */
519 };
520
521 /**
522 * struct ccp_ecc_point - CCP ECC point definition
523 * @x: the x coordinate of the ECC point
524 * @x_len: the length of the x coordinate
525 * @y: the y coordinate of the ECC point
526 * @y_len: the length of the y coordinate
527 */
528 struct ccp_ecc_point {
529 struct scatterlist *x;
530 unsigned int x_len; /* In bytes */
531
532 struct scatterlist *y;
533 unsigned int y_len; /* In bytes */
534 };
535
536 /**
537 * struct ccp_ecc_point_math - CCP ECC point math parameters
538 * @point_1: the first point of the ECC point math operation
539 * @point_2: the second point of the ECC point math operation
540 * (only used for CCP_ECC_FUNCTION_PADD_384BIT)
541 * @domain_a: the a parameter of the ECC curve
542 * @domain_a_len: the length of the a parameter
543 * @scalar: the scalar parameter for the point match operation
544 * (only used for CCP_ECC_FUNCTION_PMUL_384BIT)
545 * @scalar_len: the length of the scalar parameter
546 * (only used for CCP_ECC_FUNCTION_PMUL_384BIT)
547 * @result: the point resulting from the point math operation
548 */
549 struct ccp_ecc_point_math {
550 struct ccp_ecc_point point_1;
551 struct ccp_ecc_point point_2;
552
553 struct scatterlist *domain_a;
554 unsigned int domain_a_len; /* In bytes */
555
556 struct scatterlist *scalar;
557 unsigned int scalar_len; /* In bytes */
558
559 struct ccp_ecc_point result;
560 };
561
562 /**
563 * struct ccp_ecc_engine - CCP ECC operation
564 * @function: ECC function to perform
565 * @mod: ECC modulus
566 * @mod_len: length in bytes of modulus
567 * @mm: module math parameters
568 * @pm: point math parameters
569 * @ecc_result: result of the ECC operation
570 *
571 * Variables required to be set when calling ccp_enqueue_cmd():
572 * - function, mod, mod_len
573 * - operand, operand_len, operand_count, output, output_len, output_count
574 * - ecc_result
575 */
576 struct ccp_ecc_engine {
577 enum ccp_ecc_function function;
578
579 struct scatterlist *mod;
580 u32 mod_len; /* In bytes */
581
582 union {
583 struct ccp_ecc_modular_math mm;
584 struct ccp_ecc_point_math pm;
585 } u;
586
587 u16 ecc_result;
588 };
589
590
591 /**
592 * ccp_engine - CCP operation identifiers
593 *
594 * @CCP_ENGINE_AES: AES operation
595 * @CCP_ENGINE_XTS_AES: 128-bit XTS AES operation
596 * @CCP_ENGINE_RSVD1: unused
597 * @CCP_ENGINE_SHA: SHA operation
598 * @CCP_ENGINE_RSA: RSA operation
599 * @CCP_ENGINE_PASSTHRU: pass-through operation
600 * @CCP_ENGINE_ZLIB_DECOMPRESS: unused
601 * @CCP_ENGINE_ECC: ECC operation
602 */
603 enum ccp_engine {
604 CCP_ENGINE_AES = 0,
605 CCP_ENGINE_XTS_AES_128,
606 CCP_ENGINE_DES3,
607 CCP_ENGINE_SHA,
608 CCP_ENGINE_RSA,
609 CCP_ENGINE_PASSTHRU,
610 CCP_ENGINE_ZLIB_DECOMPRESS,
611 CCP_ENGINE_ECC,
612 CCP_ENGINE__LAST,
613 };
614
615 /* Flag values for flags member of ccp_cmd */
616 #define CCP_CMD_MAY_BACKLOG 0x00000001
617 #define CCP_CMD_PASSTHRU_NO_DMA_MAP 0x00000002
618
619 /**
620 * struct ccp_cmd - CCP operation request
621 * @entry: list element (ccp driver use only)
622 * @work: work element used for callbacks (ccp driver use only)
623 * @ccp: CCP device to be run on
624 * @ret: operation return code (ccp driver use only)
625 * @flags: cmd processing flags
626 * @engine: CCP operation to perform
627 * @engine_error: CCP engine return code
628 * @u: engine specific structures, refer to specific engine struct below
629 * @callback: operation completion callback function
630 * @data: parameter value to be supplied to the callback function
631 *
632 * Variables required to be set when calling ccp_enqueue_cmd():
633 * - engine, callback
634 * - See the operation structures below for what is required for each
635 * operation.
636 */
637 struct ccp_cmd {
638 /* The list_head, work_struct, ccp and ret variables are for use
639 * by the CCP driver only.
640 */
641 struct list_head entry;
642 struct work_struct work;
643 struct ccp_device *ccp;
644 int ret;
645
646 u32 flags;
647
648 enum ccp_engine engine;
649 u32 engine_error;
650
651 union {
652 struct ccp_aes_engine aes;
653 struct ccp_xts_aes_engine xts;
654 struct ccp_des3_engine des3;
655 struct ccp_sha_engine sha;
656 struct ccp_rsa_engine rsa;
657 struct ccp_passthru_engine passthru;
658 struct ccp_passthru_nomap_engine passthru_nomap;
659 struct ccp_ecc_engine ecc;
660 } u;
661
662 /* Completion callback support */
663 void (*callback)(void *data, int err);
664 void *data;
665 };
666
667 #endif
668