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63b94509 TL |
1 | /* |
2 | * AMD Cryptographic Coprocessor (CCP) driver | |
3 | * | |
4 | * Copyright (C) 2013 Advanced Micro Devices, Inc. | |
5 | * | |
6 | * Author: Tom Lendacky <thomas.lendacky@amd.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #ifndef __CPP_H__ | |
14 | #define __CPP_H__ | |
15 | ||
16 | #include <linux/scatterlist.h> | |
17 | #include <linux/workqueue.h> | |
18 | #include <linux/list.h> | |
19 | #include <crypto/aes.h> | |
20 | #include <crypto/sha.h> | |
21 | ||
22 | ||
23 | struct ccp_device; | |
24 | struct ccp_cmd; | |
25 | ||
db34cf91 TL |
26 | #if defined(CONFIG_CRYPTO_DEV_CCP_DD) || \ |
27 | defined(CONFIG_CRYPTO_DEV_CCP_DD_MODULE) | |
28 | ||
c9f21cb6 TL |
29 | /** |
30 | * ccp_present - check if a CCP device is present | |
31 | * | |
32 | * Returns zero if a CCP device is present, -ENODEV otherwise. | |
33 | */ | |
34 | int ccp_present(void); | |
35 | ||
63b94509 TL |
36 | /** |
37 | * ccp_enqueue_cmd - queue an operation for processing by the CCP | |
38 | * | |
39 | * @cmd: ccp_cmd struct to be processed | |
40 | * | |
41 | * Refer to the ccp_cmd struct below for required fields. | |
42 | * | |
43 | * Queue a cmd to be processed by the CCP. If queueing the cmd | |
44 | * would exceed the defined length of the cmd queue the cmd will | |
45 | * only be queued if the CCP_CMD_MAY_BACKLOG flag is set and will | |
46 | * result in a return code of -EBUSY. | |
47 | * | |
48 | * The callback routine specified in the ccp_cmd struct will be | |
49 | * called to notify the caller of completion (if the cmd was not | |
50 | * backlogged) or advancement out of the backlog. If the cmd has | |
51 | * advanced out of the backlog the "err" value of the callback | |
52 | * will be -EINPROGRESS. Any other "err" value during callback is | |
53 | * the result of the operation. | |
54 | * | |
55 | * The cmd has been successfully queued if: | |
56 | * the return code is -EINPROGRESS or | |
57 | * the return code is -EBUSY and CCP_CMD_MAY_BACKLOG flag is set | |
58 | */ | |
59 | int ccp_enqueue_cmd(struct ccp_cmd *cmd); | |
60 | ||
db34cf91 TL |
61 | #else /* CONFIG_CRYPTO_DEV_CCP_DD is not enabled */ |
62 | ||
c9f21cb6 TL |
63 | static inline int ccp_present(void) |
64 | { | |
65 | return -ENODEV; | |
66 | } | |
67 | ||
db34cf91 TL |
68 | static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd) |
69 | { | |
70 | return -ENODEV; | |
71 | } | |
72 | ||
73 | #endif /* CONFIG_CRYPTO_DEV_CCP_DD */ | |
74 | ||
63b94509 TL |
75 | |
76 | /***** AES engine *****/ | |
77 | /** | |
78 | * ccp_aes_type - AES key size | |
79 | * | |
80 | * @CCP_AES_TYPE_128: 128-bit key | |
81 | * @CCP_AES_TYPE_192: 192-bit key | |
82 | * @CCP_AES_TYPE_256: 256-bit key | |
83 | */ | |
84 | enum ccp_aes_type { | |
85 | CCP_AES_TYPE_128 = 0, | |
86 | CCP_AES_TYPE_192, | |
87 | CCP_AES_TYPE_256, | |
88 | CCP_AES_TYPE__LAST, | |
89 | }; | |
90 | ||
91 | /** | |
92 | * ccp_aes_mode - AES operation mode | |
93 | * | |
94 | * @CCP_AES_MODE_ECB: ECB mode | |
95 | * @CCP_AES_MODE_CBC: CBC mode | |
96 | * @CCP_AES_MODE_OFB: OFB mode | |
97 | * @CCP_AES_MODE_CFB: CFB mode | |
98 | * @CCP_AES_MODE_CTR: CTR mode | |
99 | * @CCP_AES_MODE_CMAC: CMAC mode | |
100 | */ | |
101 | enum ccp_aes_mode { | |
102 | CCP_AES_MODE_ECB = 0, | |
103 | CCP_AES_MODE_CBC, | |
104 | CCP_AES_MODE_OFB, | |
105 | CCP_AES_MODE_CFB, | |
106 | CCP_AES_MODE_CTR, | |
107 | CCP_AES_MODE_CMAC, | |
108 | CCP_AES_MODE__LAST, | |
109 | }; | |
110 | ||
111 | /** | |
112 | * ccp_aes_mode - AES operation mode | |
113 | * | |
114 | * @CCP_AES_ACTION_DECRYPT: AES decrypt operation | |
115 | * @CCP_AES_ACTION_ENCRYPT: AES encrypt operation | |
116 | */ | |
117 | enum ccp_aes_action { | |
118 | CCP_AES_ACTION_DECRYPT = 0, | |
119 | CCP_AES_ACTION_ENCRYPT, | |
120 | CCP_AES_ACTION__LAST, | |
121 | }; | |
122 | ||
123 | /** | |
124 | * struct ccp_aes_engine - CCP AES operation | |
125 | * @type: AES operation key size | |
126 | * @mode: AES operation mode | |
127 | * @action: AES operation (decrypt/encrypt) | |
128 | * @key: key to be used for this AES operation | |
129 | * @key_len: length in bytes of key | |
130 | * @iv: IV to be used for this AES operation | |
131 | * @iv_len: length in bytes of iv | |
132 | * @src: data to be used for this operation | |
133 | * @dst: data produced by this operation | |
134 | * @src_len: length in bytes of data used for this operation | |
135 | * @cmac_final: indicates final operation when running in CMAC mode | |
136 | * @cmac_key: K1/K2 key used in final CMAC operation | |
137 | * @cmac_key_len: length in bytes of cmac_key | |
138 | * | |
139 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
140 | * - type, mode, action, key, key_len, src, dst, src_len | |
141 | * - iv, iv_len for any mode other than ECB | |
142 | * - cmac_final for CMAC mode | |
143 | * - cmac_key, cmac_key_len for CMAC mode if cmac_final is non-zero | |
144 | * | |
145 | * The iv variable is used as both input and output. On completion of the | |
146 | * AES operation the new IV overwrites the old IV. | |
147 | */ | |
148 | struct ccp_aes_engine { | |
149 | enum ccp_aes_type type; | |
150 | enum ccp_aes_mode mode; | |
151 | enum ccp_aes_action action; | |
152 | ||
153 | struct scatterlist *key; | |
154 | u32 key_len; /* In bytes */ | |
155 | ||
156 | struct scatterlist *iv; | |
157 | u32 iv_len; /* In bytes */ | |
158 | ||
159 | struct scatterlist *src, *dst; | |
81a59f00 | 160 | u64 src_len; /* In bytes */ |
63b94509 TL |
161 | |
162 | u32 cmac_final; /* Indicates final cmac cmd */ | |
163 | struct scatterlist *cmac_key; /* K1/K2 cmac key required for | |
164 | * final cmac cmd */ | |
165 | u32 cmac_key_len; /* In bytes */ | |
166 | }; | |
167 | ||
168 | /***** XTS-AES engine *****/ | |
169 | /** | |
170 | * ccp_xts_aes_unit_size - XTS unit size | |
171 | * | |
172 | * @CCP_XTS_AES_UNIT_SIZE_16: Unit size of 16 bytes | |
173 | * @CCP_XTS_AES_UNIT_SIZE_512: Unit size of 512 bytes | |
174 | * @CCP_XTS_AES_UNIT_SIZE_1024: Unit size of 1024 bytes | |
175 | * @CCP_XTS_AES_UNIT_SIZE_2048: Unit size of 2048 bytes | |
176 | * @CCP_XTS_AES_UNIT_SIZE_4096: Unit size of 4096 bytes | |
177 | */ | |
178 | enum ccp_xts_aes_unit_size { | |
179 | CCP_XTS_AES_UNIT_SIZE_16 = 0, | |
180 | CCP_XTS_AES_UNIT_SIZE_512, | |
181 | CCP_XTS_AES_UNIT_SIZE_1024, | |
182 | CCP_XTS_AES_UNIT_SIZE_2048, | |
183 | CCP_XTS_AES_UNIT_SIZE_4096, | |
184 | CCP_XTS_AES_UNIT_SIZE__LAST, | |
185 | }; | |
186 | ||
187 | /** | |
188 | * struct ccp_xts_aes_engine - CCP XTS AES operation | |
189 | * @action: AES operation (decrypt/encrypt) | |
190 | * @unit_size: unit size of the XTS operation | |
191 | * @key: key to be used for this XTS AES operation | |
192 | * @key_len: length in bytes of key | |
193 | * @iv: IV to be used for this XTS AES operation | |
194 | * @iv_len: length in bytes of iv | |
195 | * @src: data to be used for this operation | |
196 | * @dst: data produced by this operation | |
197 | * @src_len: length in bytes of data used for this operation | |
198 | * @final: indicates final XTS operation | |
199 | * | |
200 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
201 | * - action, unit_size, key, key_len, iv, iv_len, src, dst, src_len, final | |
202 | * | |
203 | * The iv variable is used as both input and output. On completion of the | |
204 | * AES operation the new IV overwrites the old IV. | |
205 | */ | |
206 | struct ccp_xts_aes_engine { | |
207 | enum ccp_aes_action action; | |
208 | enum ccp_xts_aes_unit_size unit_size; | |
209 | ||
210 | struct scatterlist *key; | |
211 | u32 key_len; /* In bytes */ | |
212 | ||
213 | struct scatterlist *iv; | |
214 | u32 iv_len; /* In bytes */ | |
215 | ||
216 | struct scatterlist *src, *dst; | |
81a59f00 | 217 | u64 src_len; /* In bytes */ |
63b94509 TL |
218 | |
219 | u32 final; | |
220 | }; | |
221 | ||
222 | /***** SHA engine *****/ | |
223 | #define CCP_SHA_BLOCKSIZE SHA256_BLOCK_SIZE | |
224 | #define CCP_SHA_CTXSIZE SHA256_DIGEST_SIZE | |
225 | ||
226 | /** | |
227 | * ccp_sha_type - type of SHA operation | |
228 | * | |
229 | * @CCP_SHA_TYPE_1: SHA-1 operation | |
230 | * @CCP_SHA_TYPE_224: SHA-224 operation | |
231 | * @CCP_SHA_TYPE_256: SHA-256 operation | |
232 | */ | |
233 | enum ccp_sha_type { | |
234 | CCP_SHA_TYPE_1 = 1, | |
235 | CCP_SHA_TYPE_224, | |
236 | CCP_SHA_TYPE_256, | |
237 | CCP_SHA_TYPE__LAST, | |
238 | }; | |
239 | ||
240 | /** | |
241 | * struct ccp_sha_engine - CCP SHA operation | |
242 | * @type: Type of SHA operation | |
243 | * @ctx: current hash value | |
244 | * @ctx_len: length in bytes of hash value | |
245 | * @src: data to be used for this operation | |
246 | * @src_len: length in bytes of data used for this operation | |
c11baa02 TL |
247 | * @opad: data to be used for final HMAC operation |
248 | * @opad_len: length in bytes of data used for final HMAC operation | |
249 | * @first: indicates first SHA operation | |
63b94509 TL |
250 | * @final: indicates final SHA operation |
251 | * @msg_bits: total length of the message in bits used in final SHA operation | |
252 | * | |
253 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
254 | * - type, ctx, ctx_len, src, src_len, final | |
255 | * - msg_bits if final is non-zero | |
256 | * | |
257 | * The ctx variable is used as both input and output. On completion of the | |
258 | * SHA operation the new hash value overwrites the old hash value. | |
259 | */ | |
260 | struct ccp_sha_engine { | |
261 | enum ccp_sha_type type; | |
262 | ||
263 | struct scatterlist *ctx; | |
264 | u32 ctx_len; /* In bytes */ | |
265 | ||
266 | struct scatterlist *src; | |
81a59f00 | 267 | u64 src_len; /* In bytes */ |
63b94509 | 268 | |
c11baa02 TL |
269 | struct scatterlist *opad; |
270 | u32 opad_len; /* In bytes */ | |
271 | ||
272 | u32 first; /* Indicates first sha cmd */ | |
63b94509 TL |
273 | u32 final; /* Indicates final sha cmd */ |
274 | u64 msg_bits; /* Message length in bits required for | |
275 | * final sha cmd */ | |
276 | }; | |
277 | ||
278 | /***** RSA engine *****/ | |
279 | /** | |
280 | * struct ccp_rsa_engine - CCP RSA operation | |
281 | * @key_size: length in bits of RSA key | |
282 | * @exp: RSA exponent | |
283 | * @exp_len: length in bytes of exponent | |
284 | * @mod: RSA modulus | |
285 | * @mod_len: length in bytes of modulus | |
286 | * @src: data to be used for this operation | |
287 | * @dst: data produced by this operation | |
288 | * @src_len: length in bytes of data used for this operation | |
289 | * | |
290 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
291 | * - key_size, exp, exp_len, mod, mod_len, src, dst, src_len | |
292 | */ | |
293 | struct ccp_rsa_engine { | |
294 | u32 key_size; /* In bits */ | |
295 | ||
296 | struct scatterlist *exp; | |
297 | u32 exp_len; /* In bytes */ | |
298 | ||
299 | struct scatterlist *mod; | |
300 | u32 mod_len; /* In bytes */ | |
301 | ||
302 | struct scatterlist *src, *dst; | |
303 | u32 src_len; /* In bytes */ | |
304 | }; | |
305 | ||
306 | /***** Passthru engine *****/ | |
307 | /** | |
308 | * ccp_passthru_bitwise - type of bitwise passthru operation | |
309 | * | |
310 | * @CCP_PASSTHRU_BITWISE_NOOP: no bitwise operation performed | |
311 | * @CCP_PASSTHRU_BITWISE_AND: perform bitwise AND of src with mask | |
312 | * @CCP_PASSTHRU_BITWISE_OR: perform bitwise OR of src with mask | |
313 | * @CCP_PASSTHRU_BITWISE_XOR: perform bitwise XOR of src with mask | |
314 | * @CCP_PASSTHRU_BITWISE_MASK: overwrite with mask | |
315 | */ | |
316 | enum ccp_passthru_bitwise { | |
317 | CCP_PASSTHRU_BITWISE_NOOP = 0, | |
318 | CCP_PASSTHRU_BITWISE_AND, | |
319 | CCP_PASSTHRU_BITWISE_OR, | |
320 | CCP_PASSTHRU_BITWISE_XOR, | |
321 | CCP_PASSTHRU_BITWISE_MASK, | |
322 | CCP_PASSTHRU_BITWISE__LAST, | |
323 | }; | |
324 | ||
325 | /** | |
326 | * ccp_passthru_byteswap - type of byteswap passthru operation | |
327 | * | |
328 | * @CCP_PASSTHRU_BYTESWAP_NOOP: no byte swapping performed | |
329 | * @CCP_PASSTHRU_BYTESWAP_32BIT: swap bytes within 32-bit words | |
330 | * @CCP_PASSTHRU_BYTESWAP_256BIT: swap bytes within 256-bit words | |
331 | */ | |
332 | enum ccp_passthru_byteswap { | |
333 | CCP_PASSTHRU_BYTESWAP_NOOP = 0, | |
334 | CCP_PASSTHRU_BYTESWAP_32BIT, | |
335 | CCP_PASSTHRU_BYTESWAP_256BIT, | |
336 | CCP_PASSTHRU_BYTESWAP__LAST, | |
337 | }; | |
338 | ||
339 | /** | |
340 | * struct ccp_passthru_engine - CCP pass-through operation | |
341 | * @bit_mod: bitwise operation to perform | |
342 | * @byte_swap: byteswap operation to perform | |
343 | * @mask: mask to be applied to data | |
344 | * @mask_len: length in bytes of mask | |
345 | * @src: data to be used for this operation | |
346 | * @dst: data produced by this operation | |
347 | * @src_len: length in bytes of data used for this operation | |
348 | * @final: indicate final pass-through operation | |
349 | * | |
350 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
351 | * - bit_mod, byte_swap, src, dst, src_len | |
352 | * - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP | |
353 | */ | |
354 | struct ccp_passthru_engine { | |
355 | enum ccp_passthru_bitwise bit_mod; | |
356 | enum ccp_passthru_byteswap byte_swap; | |
357 | ||
358 | struct scatterlist *mask; | |
359 | u32 mask_len; /* In bytes */ | |
360 | ||
361 | struct scatterlist *src, *dst; | |
81a59f00 | 362 | u64 src_len; /* In bytes */ |
63b94509 TL |
363 | |
364 | u32 final; | |
365 | }; | |
366 | ||
367 | /***** ECC engine *****/ | |
368 | #define CCP_ECC_MODULUS_BYTES 48 /* 384-bits */ | |
369 | #define CCP_ECC_MAX_OPERANDS 6 | |
370 | #define CCP_ECC_MAX_OUTPUTS 3 | |
371 | ||
372 | /** | |
373 | * ccp_ecc_function - type of ECC function | |
374 | * | |
375 | * @CCP_ECC_FUNCTION_MMUL_384BIT: 384-bit modular multiplication | |
376 | * @CCP_ECC_FUNCTION_MADD_384BIT: 384-bit modular addition | |
377 | * @CCP_ECC_FUNCTION_MINV_384BIT: 384-bit multiplicative inverse | |
378 | * @CCP_ECC_FUNCTION_PADD_384BIT: 384-bit point addition | |
379 | * @CCP_ECC_FUNCTION_PMUL_384BIT: 384-bit point multiplication | |
380 | * @CCP_ECC_FUNCTION_PDBL_384BIT: 384-bit point doubling | |
381 | */ | |
382 | enum ccp_ecc_function { | |
383 | CCP_ECC_FUNCTION_MMUL_384BIT = 0, | |
384 | CCP_ECC_FUNCTION_MADD_384BIT, | |
385 | CCP_ECC_FUNCTION_MINV_384BIT, | |
386 | CCP_ECC_FUNCTION_PADD_384BIT, | |
387 | CCP_ECC_FUNCTION_PMUL_384BIT, | |
388 | CCP_ECC_FUNCTION_PDBL_384BIT, | |
389 | }; | |
390 | ||
391 | /** | |
392 | * struct ccp_ecc_modular_math - CCP ECC modular math parameters | |
393 | * @operand_1: first operand for the modular math operation | |
394 | * @operand_1_len: length of the first operand | |
395 | * @operand_2: second operand for the modular math operation | |
396 | * (not used for CCP_ECC_FUNCTION_MINV_384BIT) | |
397 | * @operand_2_len: length of the second operand | |
398 | * (not used for CCP_ECC_FUNCTION_MINV_384BIT) | |
399 | * @result: result of the modular math operation | |
400 | * @result_len: length of the supplied result buffer | |
401 | */ | |
402 | struct ccp_ecc_modular_math { | |
403 | struct scatterlist *operand_1; | |
404 | unsigned int operand_1_len; /* In bytes */ | |
405 | ||
406 | struct scatterlist *operand_2; | |
407 | unsigned int operand_2_len; /* In bytes */ | |
408 | ||
409 | struct scatterlist *result; | |
410 | unsigned int result_len; /* In bytes */ | |
411 | }; | |
412 | ||
413 | /** | |
414 | * struct ccp_ecc_point - CCP ECC point definition | |
415 | * @x: the x coordinate of the ECC point | |
416 | * @x_len: the length of the x coordinate | |
417 | * @y: the y coordinate of the ECC point | |
418 | * @y_len: the length of the y coordinate | |
419 | */ | |
420 | struct ccp_ecc_point { | |
421 | struct scatterlist *x; | |
422 | unsigned int x_len; /* In bytes */ | |
423 | ||
424 | struct scatterlist *y; | |
425 | unsigned int y_len; /* In bytes */ | |
426 | }; | |
427 | ||
428 | /** | |
429 | * struct ccp_ecc_point_math - CCP ECC point math parameters | |
430 | * @point_1: the first point of the ECC point math operation | |
431 | * @point_2: the second point of the ECC point math operation | |
432 | * (only used for CCP_ECC_FUNCTION_PADD_384BIT) | |
433 | * @domain_a: the a parameter of the ECC curve | |
434 | * @domain_a_len: the length of the a parameter | |
435 | * @scalar: the scalar parameter for the point match operation | |
436 | * (only used for CCP_ECC_FUNCTION_PMUL_384BIT) | |
437 | * @scalar_len: the length of the scalar parameter | |
438 | * (only used for CCP_ECC_FUNCTION_PMUL_384BIT) | |
439 | * @result: the point resulting from the point math operation | |
440 | */ | |
441 | struct ccp_ecc_point_math { | |
442 | struct ccp_ecc_point point_1; | |
443 | struct ccp_ecc_point point_2; | |
444 | ||
445 | struct scatterlist *domain_a; | |
446 | unsigned int domain_a_len; /* In bytes */ | |
447 | ||
448 | struct scatterlist *scalar; | |
449 | unsigned int scalar_len; /* In bytes */ | |
450 | ||
451 | struct ccp_ecc_point result; | |
452 | }; | |
453 | ||
454 | /** | |
455 | * struct ccp_ecc_engine - CCP ECC operation | |
456 | * @function: ECC function to perform | |
457 | * @mod: ECC modulus | |
458 | * @mod_len: length in bytes of modulus | |
459 | * @mm: module math parameters | |
460 | * @pm: point math parameters | |
461 | * @ecc_result: result of the ECC operation | |
462 | * | |
463 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
464 | * - function, mod, mod_len | |
465 | * - operand, operand_len, operand_count, output, output_len, output_count | |
466 | * - ecc_result | |
467 | */ | |
468 | struct ccp_ecc_engine { | |
469 | enum ccp_ecc_function function; | |
470 | ||
471 | struct scatterlist *mod; | |
472 | u32 mod_len; /* In bytes */ | |
473 | ||
474 | union { | |
475 | struct ccp_ecc_modular_math mm; | |
476 | struct ccp_ecc_point_math pm; | |
477 | } u; | |
478 | ||
479 | u16 ecc_result; | |
480 | }; | |
481 | ||
482 | ||
483 | /** | |
484 | * ccp_engine - CCP operation identifiers | |
485 | * | |
486 | * @CCP_ENGINE_AES: AES operation | |
487 | * @CCP_ENGINE_XTS_AES: 128-bit XTS AES operation | |
488 | * @CCP_ENGINE_RSVD1: unused | |
489 | * @CCP_ENGINE_SHA: SHA operation | |
490 | * @CCP_ENGINE_RSA: RSA operation | |
491 | * @CCP_ENGINE_PASSTHRU: pass-through operation | |
492 | * @CCP_ENGINE_ZLIB_DECOMPRESS: unused | |
493 | * @CCP_ENGINE_ECC: ECC operation | |
494 | */ | |
495 | enum ccp_engine { | |
496 | CCP_ENGINE_AES = 0, | |
497 | CCP_ENGINE_XTS_AES_128, | |
498 | CCP_ENGINE_RSVD1, | |
499 | CCP_ENGINE_SHA, | |
500 | CCP_ENGINE_RSA, | |
501 | CCP_ENGINE_PASSTHRU, | |
502 | CCP_ENGINE_ZLIB_DECOMPRESS, | |
503 | CCP_ENGINE_ECC, | |
504 | CCP_ENGINE__LAST, | |
505 | }; | |
506 | ||
507 | /* Flag values for flags member of ccp_cmd */ | |
508 | #define CCP_CMD_MAY_BACKLOG 0x00000001 | |
509 | ||
510 | /** | |
511 | * struct ccp_cmd - CPP operation request | |
512 | * @entry: list element (ccp driver use only) | |
513 | * @work: work element used for callbacks (ccp driver use only) | |
514 | * @ccp: CCP device to be run on (ccp driver use only) | |
515 | * @ret: operation return code (ccp driver use only) | |
516 | * @flags: cmd processing flags | |
517 | * @engine: CCP operation to perform | |
518 | * @engine_error: CCP engine return code | |
519 | * @u: engine specific structures, refer to specific engine struct below | |
520 | * @callback: operation completion callback function | |
521 | * @data: parameter value to be supplied to the callback function | |
522 | * | |
523 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
524 | * - engine, callback | |
525 | * - See the operation structures below for what is required for each | |
526 | * operation. | |
527 | */ | |
528 | struct ccp_cmd { | |
529 | /* The list_head, work_struct, ccp and ret variables are for use | |
530 | * by the CCP driver only. | |
531 | */ | |
532 | struct list_head entry; | |
533 | struct work_struct work; | |
534 | struct ccp_device *ccp; | |
535 | int ret; | |
536 | ||
537 | u32 flags; | |
538 | ||
539 | enum ccp_engine engine; | |
540 | u32 engine_error; | |
541 | ||
542 | union { | |
543 | struct ccp_aes_engine aes; | |
544 | struct ccp_xts_aes_engine xts; | |
545 | struct ccp_sha_engine sha; | |
546 | struct ccp_rsa_engine rsa; | |
547 | struct ccp_passthru_engine passthru; | |
548 | struct ccp_ecc_engine ecc; | |
549 | } u; | |
550 | ||
551 | /* Completion callback support */ | |
552 | void (*callback)(void *data, int err); | |
553 | void *data; | |
554 | }; | |
555 | ||
556 | #endif |