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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 | ||
c7019c4d GH |
36 | #define CCP_VSIZE 16 |
37 | #define CCP_VMASK ((unsigned int)((1 << CCP_VSIZE) - 1)) | |
38 | #define CCP_VERSION(v, r) ((unsigned int)((v << CCP_VSIZE) \ | |
39 | | (r & CCP_VMASK))) | |
40 | ||
41 | /** | |
42 | * ccp_version - get the version of the CCP | |
43 | * | |
44 | * Returns a positive version number, or zero if no CCP | |
45 | */ | |
46 | unsigned int ccp_version(void); | |
47 | ||
63b94509 TL |
48 | /** |
49 | * ccp_enqueue_cmd - queue an operation for processing by the CCP | |
50 | * | |
51 | * @cmd: ccp_cmd struct to be processed | |
52 | * | |
53 | * Refer to the ccp_cmd struct below for required fields. | |
54 | * | |
55 | * Queue a cmd to be processed by the CCP. If queueing the cmd | |
56 | * would exceed the defined length of the cmd queue the cmd will | |
57 | * only be queued if the CCP_CMD_MAY_BACKLOG flag is set and will | |
58 | * result in a return code of -EBUSY. | |
59 | * | |
60 | * The callback routine specified in the ccp_cmd struct will be | |
61 | * called to notify the caller of completion (if the cmd was not | |
62 | * backlogged) or advancement out of the backlog. If the cmd has | |
63 | * advanced out of the backlog the "err" value of the callback | |
64 | * will be -EINPROGRESS. Any other "err" value during callback is | |
65 | * the result of the operation. | |
66 | * | |
67 | * The cmd has been successfully queued if: | |
68 | * the return code is -EINPROGRESS or | |
69 | * the return code is -EBUSY and CCP_CMD_MAY_BACKLOG flag is set | |
70 | */ | |
71 | int ccp_enqueue_cmd(struct ccp_cmd *cmd); | |
72 | ||
db34cf91 TL |
73 | #else /* CONFIG_CRYPTO_DEV_CCP_DD is not enabled */ |
74 | ||
c9f21cb6 TL |
75 | static inline int ccp_present(void) |
76 | { | |
77 | return -ENODEV; | |
78 | } | |
79 | ||
c7019c4d GH |
80 | static inline unsigned int ccp_version(void) |
81 | { | |
82 | return 0; | |
83 | } | |
84 | ||
db34cf91 TL |
85 | static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd) |
86 | { | |
87 | return -ENODEV; | |
88 | } | |
89 | ||
90 | #endif /* CONFIG_CRYPTO_DEV_CCP_DD */ | |
91 | ||
63b94509 TL |
92 | |
93 | /***** AES engine *****/ | |
94 | /** | |
95 | * ccp_aes_type - AES key size | |
96 | * | |
97 | * @CCP_AES_TYPE_128: 128-bit key | |
98 | * @CCP_AES_TYPE_192: 192-bit key | |
99 | * @CCP_AES_TYPE_256: 256-bit key | |
100 | */ | |
101 | enum ccp_aes_type { | |
102 | CCP_AES_TYPE_128 = 0, | |
103 | CCP_AES_TYPE_192, | |
104 | CCP_AES_TYPE_256, | |
105 | CCP_AES_TYPE__LAST, | |
106 | }; | |
107 | ||
108 | /** | |
109 | * ccp_aes_mode - AES operation mode | |
110 | * | |
111 | * @CCP_AES_MODE_ECB: ECB mode | |
112 | * @CCP_AES_MODE_CBC: CBC mode | |
113 | * @CCP_AES_MODE_OFB: OFB mode | |
114 | * @CCP_AES_MODE_CFB: CFB mode | |
115 | * @CCP_AES_MODE_CTR: CTR mode | |
116 | * @CCP_AES_MODE_CMAC: CMAC mode | |
117 | */ | |
118 | enum ccp_aes_mode { | |
119 | CCP_AES_MODE_ECB = 0, | |
120 | CCP_AES_MODE_CBC, | |
121 | CCP_AES_MODE_OFB, | |
122 | CCP_AES_MODE_CFB, | |
123 | CCP_AES_MODE_CTR, | |
124 | CCP_AES_MODE_CMAC, | |
125 | CCP_AES_MODE__LAST, | |
126 | }; | |
127 | ||
128 | /** | |
129 | * ccp_aes_mode - AES operation mode | |
130 | * | |
131 | * @CCP_AES_ACTION_DECRYPT: AES decrypt operation | |
132 | * @CCP_AES_ACTION_ENCRYPT: AES encrypt operation | |
133 | */ | |
134 | enum ccp_aes_action { | |
135 | CCP_AES_ACTION_DECRYPT = 0, | |
136 | CCP_AES_ACTION_ENCRYPT, | |
137 | CCP_AES_ACTION__LAST, | |
138 | }; | |
139 | ||
140 | /** | |
141 | * struct ccp_aes_engine - CCP AES operation | |
142 | * @type: AES operation key size | |
143 | * @mode: AES operation mode | |
144 | * @action: AES operation (decrypt/encrypt) | |
145 | * @key: key to be used for this AES operation | |
146 | * @key_len: length in bytes of key | |
147 | * @iv: IV to be used for this AES operation | |
148 | * @iv_len: length in bytes of iv | |
149 | * @src: data to be used for this operation | |
150 | * @dst: data produced by this operation | |
151 | * @src_len: length in bytes of data used for this operation | |
152 | * @cmac_final: indicates final operation when running in CMAC mode | |
153 | * @cmac_key: K1/K2 key used in final CMAC operation | |
154 | * @cmac_key_len: length in bytes of cmac_key | |
155 | * | |
156 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
157 | * - type, mode, action, key, key_len, src, dst, src_len | |
158 | * - iv, iv_len for any mode other than ECB | |
159 | * - cmac_final for CMAC mode | |
160 | * - cmac_key, cmac_key_len for CMAC mode if cmac_final is non-zero | |
161 | * | |
162 | * The iv variable is used as both input and output. On completion of the | |
163 | * AES operation the new IV overwrites the old IV. | |
164 | */ | |
165 | struct ccp_aes_engine { | |
166 | enum ccp_aes_type type; | |
167 | enum ccp_aes_mode mode; | |
168 | enum ccp_aes_action action; | |
169 | ||
170 | struct scatterlist *key; | |
171 | u32 key_len; /* In bytes */ | |
172 | ||
173 | struct scatterlist *iv; | |
174 | u32 iv_len; /* In bytes */ | |
175 | ||
176 | struct scatterlist *src, *dst; | |
81a59f00 | 177 | u64 src_len; /* In bytes */ |
63b94509 TL |
178 | |
179 | u32 cmac_final; /* Indicates final cmac cmd */ | |
180 | struct scatterlist *cmac_key; /* K1/K2 cmac key required for | |
181 | * final cmac cmd */ | |
182 | u32 cmac_key_len; /* In bytes */ | |
183 | }; | |
184 | ||
185 | /***** XTS-AES engine *****/ | |
186 | /** | |
187 | * ccp_xts_aes_unit_size - XTS unit size | |
188 | * | |
189 | * @CCP_XTS_AES_UNIT_SIZE_16: Unit size of 16 bytes | |
190 | * @CCP_XTS_AES_UNIT_SIZE_512: Unit size of 512 bytes | |
191 | * @CCP_XTS_AES_UNIT_SIZE_1024: Unit size of 1024 bytes | |
192 | * @CCP_XTS_AES_UNIT_SIZE_2048: Unit size of 2048 bytes | |
193 | * @CCP_XTS_AES_UNIT_SIZE_4096: Unit size of 4096 bytes | |
194 | */ | |
195 | enum ccp_xts_aes_unit_size { | |
196 | CCP_XTS_AES_UNIT_SIZE_16 = 0, | |
197 | CCP_XTS_AES_UNIT_SIZE_512, | |
198 | CCP_XTS_AES_UNIT_SIZE_1024, | |
199 | CCP_XTS_AES_UNIT_SIZE_2048, | |
200 | CCP_XTS_AES_UNIT_SIZE_4096, | |
201 | CCP_XTS_AES_UNIT_SIZE__LAST, | |
202 | }; | |
203 | ||
204 | /** | |
205 | * struct ccp_xts_aes_engine - CCP XTS AES operation | |
206 | * @action: AES operation (decrypt/encrypt) | |
207 | * @unit_size: unit size of the XTS operation | |
208 | * @key: key to be used for this XTS AES operation | |
209 | * @key_len: length in bytes of key | |
210 | * @iv: IV to be used for this XTS AES operation | |
211 | * @iv_len: length in bytes of iv | |
212 | * @src: data to be used for this operation | |
213 | * @dst: data produced by this operation | |
214 | * @src_len: length in bytes of data used for this operation | |
215 | * @final: indicates final XTS operation | |
216 | * | |
217 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
218 | * - action, unit_size, key, key_len, iv, iv_len, src, dst, src_len, final | |
219 | * | |
220 | * The iv variable is used as both input and output. On completion of the | |
221 | * AES operation the new IV overwrites the old IV. | |
222 | */ | |
223 | struct ccp_xts_aes_engine { | |
224 | enum ccp_aes_action action; | |
225 | enum ccp_xts_aes_unit_size unit_size; | |
226 | ||
227 | struct scatterlist *key; | |
228 | u32 key_len; /* In bytes */ | |
229 | ||
230 | struct scatterlist *iv; | |
231 | u32 iv_len; /* In bytes */ | |
232 | ||
233 | struct scatterlist *src, *dst; | |
81a59f00 | 234 | u64 src_len; /* In bytes */ |
63b94509 TL |
235 | |
236 | u32 final; | |
237 | }; | |
238 | ||
239 | /***** SHA engine *****/ | |
240 | #define CCP_SHA_BLOCKSIZE SHA256_BLOCK_SIZE | |
241 | #define CCP_SHA_CTXSIZE SHA256_DIGEST_SIZE | |
242 | ||
243 | /** | |
244 | * ccp_sha_type - type of SHA operation | |
245 | * | |
246 | * @CCP_SHA_TYPE_1: SHA-1 operation | |
247 | * @CCP_SHA_TYPE_224: SHA-224 operation | |
248 | * @CCP_SHA_TYPE_256: SHA-256 operation | |
249 | */ | |
250 | enum ccp_sha_type { | |
251 | CCP_SHA_TYPE_1 = 1, | |
252 | CCP_SHA_TYPE_224, | |
253 | CCP_SHA_TYPE_256, | |
254 | CCP_SHA_TYPE__LAST, | |
255 | }; | |
256 | ||
257 | /** | |
258 | * struct ccp_sha_engine - CCP SHA operation | |
259 | * @type: Type of SHA operation | |
260 | * @ctx: current hash value | |
261 | * @ctx_len: length in bytes of hash value | |
262 | * @src: data to be used for this operation | |
263 | * @src_len: length in bytes of data used for this operation | |
c11baa02 TL |
264 | * @opad: data to be used for final HMAC operation |
265 | * @opad_len: length in bytes of data used for final HMAC operation | |
266 | * @first: indicates first SHA operation | |
63b94509 TL |
267 | * @final: indicates final SHA operation |
268 | * @msg_bits: total length of the message in bits used in final SHA operation | |
269 | * | |
270 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
271 | * - type, ctx, ctx_len, src, src_len, final | |
272 | * - msg_bits if final is non-zero | |
273 | * | |
274 | * The ctx variable is used as both input and output. On completion of the | |
275 | * SHA operation the new hash value overwrites the old hash value. | |
276 | */ | |
277 | struct ccp_sha_engine { | |
278 | enum ccp_sha_type type; | |
279 | ||
280 | struct scatterlist *ctx; | |
281 | u32 ctx_len; /* In bytes */ | |
282 | ||
283 | struct scatterlist *src; | |
81a59f00 | 284 | u64 src_len; /* In bytes */ |
63b94509 | 285 | |
c11baa02 TL |
286 | struct scatterlist *opad; |
287 | u32 opad_len; /* In bytes */ | |
288 | ||
289 | u32 first; /* Indicates first sha cmd */ | |
63b94509 TL |
290 | u32 final; /* Indicates final sha cmd */ |
291 | u64 msg_bits; /* Message length in bits required for | |
292 | * final sha cmd */ | |
293 | }; | |
294 | ||
295 | /***** RSA engine *****/ | |
296 | /** | |
297 | * struct ccp_rsa_engine - CCP RSA operation | |
298 | * @key_size: length in bits of RSA key | |
299 | * @exp: RSA exponent | |
300 | * @exp_len: length in bytes of exponent | |
301 | * @mod: RSA modulus | |
302 | * @mod_len: length in bytes of modulus | |
303 | * @src: data to be used for this operation | |
304 | * @dst: data produced by this operation | |
305 | * @src_len: length in bytes of data used for this operation | |
306 | * | |
307 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
308 | * - key_size, exp, exp_len, mod, mod_len, src, dst, src_len | |
309 | */ | |
310 | struct ccp_rsa_engine { | |
311 | u32 key_size; /* In bits */ | |
312 | ||
313 | struct scatterlist *exp; | |
314 | u32 exp_len; /* In bytes */ | |
315 | ||
316 | struct scatterlist *mod; | |
317 | u32 mod_len; /* In bytes */ | |
318 | ||
319 | struct scatterlist *src, *dst; | |
320 | u32 src_len; /* In bytes */ | |
321 | }; | |
322 | ||
323 | /***** Passthru engine *****/ | |
324 | /** | |
325 | * ccp_passthru_bitwise - type of bitwise passthru operation | |
326 | * | |
327 | * @CCP_PASSTHRU_BITWISE_NOOP: no bitwise operation performed | |
328 | * @CCP_PASSTHRU_BITWISE_AND: perform bitwise AND of src with mask | |
329 | * @CCP_PASSTHRU_BITWISE_OR: perform bitwise OR of src with mask | |
330 | * @CCP_PASSTHRU_BITWISE_XOR: perform bitwise XOR of src with mask | |
331 | * @CCP_PASSTHRU_BITWISE_MASK: overwrite with mask | |
332 | */ | |
333 | enum ccp_passthru_bitwise { | |
334 | CCP_PASSTHRU_BITWISE_NOOP = 0, | |
335 | CCP_PASSTHRU_BITWISE_AND, | |
336 | CCP_PASSTHRU_BITWISE_OR, | |
337 | CCP_PASSTHRU_BITWISE_XOR, | |
338 | CCP_PASSTHRU_BITWISE_MASK, | |
339 | CCP_PASSTHRU_BITWISE__LAST, | |
340 | }; | |
341 | ||
342 | /** | |
343 | * ccp_passthru_byteswap - type of byteswap passthru operation | |
344 | * | |
345 | * @CCP_PASSTHRU_BYTESWAP_NOOP: no byte swapping performed | |
346 | * @CCP_PASSTHRU_BYTESWAP_32BIT: swap bytes within 32-bit words | |
347 | * @CCP_PASSTHRU_BYTESWAP_256BIT: swap bytes within 256-bit words | |
348 | */ | |
349 | enum ccp_passthru_byteswap { | |
350 | CCP_PASSTHRU_BYTESWAP_NOOP = 0, | |
351 | CCP_PASSTHRU_BYTESWAP_32BIT, | |
352 | CCP_PASSTHRU_BYTESWAP_256BIT, | |
353 | CCP_PASSTHRU_BYTESWAP__LAST, | |
354 | }; | |
355 | ||
356 | /** | |
357 | * struct ccp_passthru_engine - CCP pass-through operation | |
358 | * @bit_mod: bitwise operation to perform | |
359 | * @byte_swap: byteswap operation to perform | |
360 | * @mask: mask to be applied to data | |
361 | * @mask_len: length in bytes of mask | |
362 | * @src: data to be used for this operation | |
363 | * @dst: data produced by this operation | |
364 | * @src_len: length in bytes of data used for this operation | |
365 | * @final: indicate final pass-through operation | |
366 | * | |
367 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
368 | * - bit_mod, byte_swap, src, dst, src_len | |
369 | * - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP | |
370 | */ | |
371 | struct ccp_passthru_engine { | |
372 | enum ccp_passthru_bitwise bit_mod; | |
373 | enum ccp_passthru_byteswap byte_swap; | |
374 | ||
375 | struct scatterlist *mask; | |
376 | u32 mask_len; /* In bytes */ | |
377 | ||
378 | struct scatterlist *src, *dst; | |
81a59f00 | 379 | u64 src_len; /* In bytes */ |
63b94509 TL |
380 | |
381 | u32 final; | |
382 | }; | |
383 | ||
384 | /***** ECC engine *****/ | |
385 | #define CCP_ECC_MODULUS_BYTES 48 /* 384-bits */ | |
386 | #define CCP_ECC_MAX_OPERANDS 6 | |
387 | #define CCP_ECC_MAX_OUTPUTS 3 | |
388 | ||
389 | /** | |
390 | * ccp_ecc_function - type of ECC function | |
391 | * | |
392 | * @CCP_ECC_FUNCTION_MMUL_384BIT: 384-bit modular multiplication | |
393 | * @CCP_ECC_FUNCTION_MADD_384BIT: 384-bit modular addition | |
394 | * @CCP_ECC_FUNCTION_MINV_384BIT: 384-bit multiplicative inverse | |
395 | * @CCP_ECC_FUNCTION_PADD_384BIT: 384-bit point addition | |
396 | * @CCP_ECC_FUNCTION_PMUL_384BIT: 384-bit point multiplication | |
397 | * @CCP_ECC_FUNCTION_PDBL_384BIT: 384-bit point doubling | |
398 | */ | |
399 | enum ccp_ecc_function { | |
400 | CCP_ECC_FUNCTION_MMUL_384BIT = 0, | |
401 | CCP_ECC_FUNCTION_MADD_384BIT, | |
402 | CCP_ECC_FUNCTION_MINV_384BIT, | |
403 | CCP_ECC_FUNCTION_PADD_384BIT, | |
404 | CCP_ECC_FUNCTION_PMUL_384BIT, | |
405 | CCP_ECC_FUNCTION_PDBL_384BIT, | |
406 | }; | |
407 | ||
408 | /** | |
409 | * struct ccp_ecc_modular_math - CCP ECC modular math parameters | |
410 | * @operand_1: first operand for the modular math operation | |
411 | * @operand_1_len: length of the first operand | |
412 | * @operand_2: second operand for the modular math operation | |
413 | * (not used for CCP_ECC_FUNCTION_MINV_384BIT) | |
414 | * @operand_2_len: length of the second operand | |
415 | * (not used for CCP_ECC_FUNCTION_MINV_384BIT) | |
416 | * @result: result of the modular math operation | |
417 | * @result_len: length of the supplied result buffer | |
418 | */ | |
419 | struct ccp_ecc_modular_math { | |
420 | struct scatterlist *operand_1; | |
421 | unsigned int operand_1_len; /* In bytes */ | |
422 | ||
423 | struct scatterlist *operand_2; | |
424 | unsigned int operand_2_len; /* In bytes */ | |
425 | ||
426 | struct scatterlist *result; | |
427 | unsigned int result_len; /* In bytes */ | |
428 | }; | |
429 | ||
430 | /** | |
431 | * struct ccp_ecc_point - CCP ECC point definition | |
432 | * @x: the x coordinate of the ECC point | |
433 | * @x_len: the length of the x coordinate | |
434 | * @y: the y coordinate of the ECC point | |
435 | * @y_len: the length of the y coordinate | |
436 | */ | |
437 | struct ccp_ecc_point { | |
438 | struct scatterlist *x; | |
439 | unsigned int x_len; /* In bytes */ | |
440 | ||
441 | struct scatterlist *y; | |
442 | unsigned int y_len; /* In bytes */ | |
443 | }; | |
444 | ||
445 | /** | |
446 | * struct ccp_ecc_point_math - CCP ECC point math parameters | |
447 | * @point_1: the first point of the ECC point math operation | |
448 | * @point_2: the second point of the ECC point math operation | |
449 | * (only used for CCP_ECC_FUNCTION_PADD_384BIT) | |
450 | * @domain_a: the a parameter of the ECC curve | |
451 | * @domain_a_len: the length of the a parameter | |
452 | * @scalar: the scalar parameter for the point match operation | |
453 | * (only used for CCP_ECC_FUNCTION_PMUL_384BIT) | |
454 | * @scalar_len: the length of the scalar parameter | |
455 | * (only used for CCP_ECC_FUNCTION_PMUL_384BIT) | |
456 | * @result: the point resulting from the point math operation | |
457 | */ | |
458 | struct ccp_ecc_point_math { | |
459 | struct ccp_ecc_point point_1; | |
460 | struct ccp_ecc_point point_2; | |
461 | ||
462 | struct scatterlist *domain_a; | |
463 | unsigned int domain_a_len; /* In bytes */ | |
464 | ||
465 | struct scatterlist *scalar; | |
466 | unsigned int scalar_len; /* In bytes */ | |
467 | ||
468 | struct ccp_ecc_point result; | |
469 | }; | |
470 | ||
471 | /** | |
472 | * struct ccp_ecc_engine - CCP ECC operation | |
473 | * @function: ECC function to perform | |
474 | * @mod: ECC modulus | |
475 | * @mod_len: length in bytes of modulus | |
476 | * @mm: module math parameters | |
477 | * @pm: point math parameters | |
478 | * @ecc_result: result of the ECC operation | |
479 | * | |
480 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
481 | * - function, mod, mod_len | |
482 | * - operand, operand_len, operand_count, output, output_len, output_count | |
483 | * - ecc_result | |
484 | */ | |
485 | struct ccp_ecc_engine { | |
486 | enum ccp_ecc_function function; | |
487 | ||
488 | struct scatterlist *mod; | |
489 | u32 mod_len; /* In bytes */ | |
490 | ||
491 | union { | |
492 | struct ccp_ecc_modular_math mm; | |
493 | struct ccp_ecc_point_math pm; | |
494 | } u; | |
495 | ||
496 | u16 ecc_result; | |
497 | }; | |
498 | ||
499 | ||
500 | /** | |
501 | * ccp_engine - CCP operation identifiers | |
502 | * | |
503 | * @CCP_ENGINE_AES: AES operation | |
504 | * @CCP_ENGINE_XTS_AES: 128-bit XTS AES operation | |
505 | * @CCP_ENGINE_RSVD1: unused | |
506 | * @CCP_ENGINE_SHA: SHA operation | |
507 | * @CCP_ENGINE_RSA: RSA operation | |
508 | * @CCP_ENGINE_PASSTHRU: pass-through operation | |
509 | * @CCP_ENGINE_ZLIB_DECOMPRESS: unused | |
510 | * @CCP_ENGINE_ECC: ECC operation | |
511 | */ | |
512 | enum ccp_engine { | |
513 | CCP_ENGINE_AES = 0, | |
514 | CCP_ENGINE_XTS_AES_128, | |
515 | CCP_ENGINE_RSVD1, | |
516 | CCP_ENGINE_SHA, | |
517 | CCP_ENGINE_RSA, | |
518 | CCP_ENGINE_PASSTHRU, | |
519 | CCP_ENGINE_ZLIB_DECOMPRESS, | |
520 | CCP_ENGINE_ECC, | |
521 | CCP_ENGINE__LAST, | |
522 | }; | |
523 | ||
524 | /* Flag values for flags member of ccp_cmd */ | |
525 | #define CCP_CMD_MAY_BACKLOG 0x00000001 | |
526 | ||
527 | /** | |
528 | * struct ccp_cmd - CPP operation request | |
529 | * @entry: list element (ccp driver use only) | |
530 | * @work: work element used for callbacks (ccp driver use only) | |
531 | * @ccp: CCP device to be run on (ccp driver use only) | |
532 | * @ret: operation return code (ccp driver use only) | |
533 | * @flags: cmd processing flags | |
534 | * @engine: CCP operation to perform | |
535 | * @engine_error: CCP engine return code | |
536 | * @u: engine specific structures, refer to specific engine struct below | |
537 | * @callback: operation completion callback function | |
538 | * @data: parameter value to be supplied to the callback function | |
539 | * | |
540 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
541 | * - engine, callback | |
542 | * - See the operation structures below for what is required for each | |
543 | * operation. | |
544 | */ | |
545 | struct ccp_cmd { | |
546 | /* The list_head, work_struct, ccp and ret variables are for use | |
547 | * by the CCP driver only. | |
548 | */ | |
549 | struct list_head entry; | |
550 | struct work_struct work; | |
551 | struct ccp_device *ccp; | |
552 | int ret; | |
553 | ||
554 | u32 flags; | |
555 | ||
556 | enum ccp_engine engine; | |
557 | u32 engine_error; | |
558 | ||
559 | union { | |
560 | struct ccp_aes_engine aes; | |
561 | struct ccp_xts_aes_engine xts; | |
562 | struct ccp_sha_engine sha; | |
563 | struct ccp_rsa_engine rsa; | |
564 | struct ccp_passthru_engine passthru; | |
565 | struct ccp_ecc_engine ecc; | |
566 | } u; | |
567 | ||
568 | /* Completion callback support */ | |
569 | void (*callback)(void *data, int err); | |
570 | void *data; | |
571 | }; | |
572 | ||
573 | #endif |