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