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63b94509 TL |
1 | /* |
2 | * AMD Cryptographic Coprocessor (CCP) driver | |
3 | * | |
58ea8abf | 4 | * Copyright (C) 2013,2016 Advanced Micro Devices, Inc. |
63b94509 TL |
5 | * |
6 | * Author: Tom Lendacky <thomas.lendacky@amd.com> | |
58ea8abf | 7 | * Author: Gary R Hook <gary.hook@amd.com> |
63b94509 TL |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
c8d283ff PB |
14 | #ifndef __CCP_H__ |
15 | #define __CCP_H__ | |
63b94509 TL |
16 | |
17 | #include <linux/scatterlist.h> | |
18 | #include <linux/workqueue.h> | |
19 | #include <linux/list.h> | |
20 | #include <crypto/aes.h> | |
21 | #include <crypto/sha.h> | |
22 | ||
23 | ||
24 | struct ccp_device; | |
25 | struct ccp_cmd; | |
26 | ||
db34cf91 TL |
27 | #if defined(CONFIG_CRYPTO_DEV_CCP_DD) || \ |
28 | defined(CONFIG_CRYPTO_DEV_CCP_DD_MODULE) | |
29 | ||
c9f21cb6 TL |
30 | /** |
31 | * ccp_present - check if a CCP device is present | |
32 | * | |
33 | * Returns zero if a CCP device is present, -ENODEV otherwise. | |
34 | */ | |
35 | int ccp_present(void); | |
36 | ||
c7019c4d GH |
37 | #define CCP_VSIZE 16 |
38 | #define CCP_VMASK ((unsigned int)((1 << CCP_VSIZE) - 1)) | |
39 | #define CCP_VERSION(v, r) ((unsigned int)((v << CCP_VSIZE) \ | |
40 | | (r & CCP_VMASK))) | |
41 | ||
42 | /** | |
43 | * ccp_version - get the version of the CCP | |
44 | * | |
45 | * Returns a positive version number, or zero if no CCP | |
46 | */ | |
47 | unsigned int ccp_version(void); | |
48 | ||
63b94509 TL |
49 | /** |
50 | * ccp_enqueue_cmd - queue an operation for processing by the CCP | |
51 | * | |
52 | * @cmd: ccp_cmd struct to be processed | |
53 | * | |
54 | * Refer to the ccp_cmd struct below for required fields. | |
55 | * | |
56 | * Queue a cmd to be processed by the CCP. If queueing the cmd | |
57 | * would exceed the defined length of the cmd queue the cmd will | |
58 | * only be queued if the CCP_CMD_MAY_BACKLOG flag is set and will | |
59 | * result in a return code of -EBUSY. | |
60 | * | |
61 | * The callback routine specified in the ccp_cmd struct will be | |
62 | * called to notify the caller of completion (if the cmd was not | |
63 | * backlogged) or advancement out of the backlog. If the cmd has | |
64 | * advanced out of the backlog the "err" value of the callback | |
65 | * will be -EINPROGRESS. Any other "err" value during callback is | |
66 | * the result of the operation. | |
67 | * | |
68 | * The cmd has been successfully queued if: | |
69 | * the return code is -EINPROGRESS or | |
70 | * the return code is -EBUSY and CCP_CMD_MAY_BACKLOG flag is set | |
71 | */ | |
72 | int ccp_enqueue_cmd(struct ccp_cmd *cmd); | |
73 | ||
db34cf91 TL |
74 | #else /* CONFIG_CRYPTO_DEV_CCP_DD is not enabled */ |
75 | ||
c9f21cb6 TL |
76 | static inline int ccp_present(void) |
77 | { | |
78 | return -ENODEV; | |
79 | } | |
80 | ||
c7019c4d GH |
81 | static inline unsigned int ccp_version(void) |
82 | { | |
83 | return 0; | |
84 | } | |
85 | ||
db34cf91 TL |
86 | static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd) |
87 | { | |
88 | return -ENODEV; | |
89 | } | |
90 | ||
91 | #endif /* CONFIG_CRYPTO_DEV_CCP_DD */ | |
92 | ||
63b94509 TL |
93 | |
94 | /***** AES engine *****/ | |
95 | /** | |
96 | * ccp_aes_type - AES key size | |
97 | * | |
98 | * @CCP_AES_TYPE_128: 128-bit key | |
99 | * @CCP_AES_TYPE_192: 192-bit key | |
100 | * @CCP_AES_TYPE_256: 256-bit key | |
101 | */ | |
102 | enum ccp_aes_type { | |
103 | CCP_AES_TYPE_128 = 0, | |
104 | CCP_AES_TYPE_192, | |
105 | CCP_AES_TYPE_256, | |
106 | CCP_AES_TYPE__LAST, | |
107 | }; | |
108 | ||
109 | /** | |
110 | * ccp_aes_mode - AES operation mode | |
111 | * | |
112 | * @CCP_AES_MODE_ECB: ECB mode | |
113 | * @CCP_AES_MODE_CBC: CBC mode | |
114 | * @CCP_AES_MODE_OFB: OFB mode | |
115 | * @CCP_AES_MODE_CFB: CFB mode | |
116 | * @CCP_AES_MODE_CTR: CTR mode | |
117 | * @CCP_AES_MODE_CMAC: CMAC mode | |
118 | */ | |
119 | enum ccp_aes_mode { | |
120 | CCP_AES_MODE_ECB = 0, | |
121 | CCP_AES_MODE_CBC, | |
122 | CCP_AES_MODE_OFB, | |
123 | CCP_AES_MODE_CFB, | |
124 | CCP_AES_MODE_CTR, | |
125 | CCP_AES_MODE_CMAC, | |
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 | ||
141 | /** | |
142 | * struct ccp_aes_engine - CCP AES operation | |
143 | * @type: AES operation key size | |
144 | * @mode: AES operation mode | |
145 | * @action: AES operation (decrypt/encrypt) | |
146 | * @key: key to be used for this AES operation | |
147 | * @key_len: length in bytes of key | |
148 | * @iv: IV to be used for this AES operation | |
149 | * @iv_len: length in bytes of iv | |
150 | * @src: data to be used for this operation | |
151 | * @dst: data produced by this operation | |
152 | * @src_len: length in bytes of data used for this operation | |
153 | * @cmac_final: indicates final operation when running in CMAC mode | |
154 | * @cmac_key: K1/K2 key used in final CMAC operation | |
155 | * @cmac_key_len: length in bytes of cmac_key | |
156 | * | |
157 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
158 | * - type, mode, action, key, key_len, src, dst, src_len | |
159 | * - iv, iv_len for any mode other than ECB | |
160 | * - cmac_final for CMAC mode | |
161 | * - cmac_key, cmac_key_len for CMAC mode if cmac_final is non-zero | |
162 | * | |
163 | * The iv variable is used as both input and output. On completion of the | |
164 | * AES operation the new IV overwrites the old IV. | |
165 | */ | |
166 | struct ccp_aes_engine { | |
167 | enum ccp_aes_type type; | |
168 | enum ccp_aes_mode mode; | |
169 | enum ccp_aes_action action; | |
170 | ||
171 | struct scatterlist *key; | |
172 | u32 key_len; /* In bytes */ | |
173 | ||
174 | struct scatterlist *iv; | |
175 | u32 iv_len; /* In bytes */ | |
176 | ||
177 | struct scatterlist *src, *dst; | |
81a59f00 | 178 | u64 src_len; /* In bytes */ |
63b94509 TL |
179 | |
180 | u32 cmac_final; /* Indicates final cmac cmd */ | |
181 | struct scatterlist *cmac_key; /* K1/K2 cmac key required for | |
182 | * final cmac cmd */ | |
183 | u32 cmac_key_len; /* In bytes */ | |
184 | }; | |
185 | ||
186 | /***** XTS-AES engine *****/ | |
187 | /** | |
188 | * ccp_xts_aes_unit_size - XTS unit size | |
189 | * | |
190 | * @CCP_XTS_AES_UNIT_SIZE_16: Unit size of 16 bytes | |
191 | * @CCP_XTS_AES_UNIT_SIZE_512: Unit size of 512 bytes | |
192 | * @CCP_XTS_AES_UNIT_SIZE_1024: Unit size of 1024 bytes | |
193 | * @CCP_XTS_AES_UNIT_SIZE_2048: Unit size of 2048 bytes | |
194 | * @CCP_XTS_AES_UNIT_SIZE_4096: Unit size of 4096 bytes | |
195 | */ | |
196 | enum ccp_xts_aes_unit_size { | |
197 | CCP_XTS_AES_UNIT_SIZE_16 = 0, | |
198 | CCP_XTS_AES_UNIT_SIZE_512, | |
199 | CCP_XTS_AES_UNIT_SIZE_1024, | |
200 | CCP_XTS_AES_UNIT_SIZE_2048, | |
201 | CCP_XTS_AES_UNIT_SIZE_4096, | |
202 | CCP_XTS_AES_UNIT_SIZE__LAST, | |
203 | }; | |
204 | ||
205 | /** | |
206 | * struct ccp_xts_aes_engine - CCP XTS AES operation | |
207 | * @action: AES operation (decrypt/encrypt) | |
208 | * @unit_size: unit size of the XTS operation | |
209 | * @key: key to be used for this XTS AES operation | |
210 | * @key_len: length in bytes of key | |
211 | * @iv: IV to be used for this XTS AES operation | |
212 | * @iv_len: length in bytes of iv | |
213 | * @src: data to be used for this operation | |
214 | * @dst: data produced by this operation | |
215 | * @src_len: length in bytes of data used for this operation | |
216 | * @final: indicates final XTS operation | |
217 | * | |
218 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
219 | * - action, unit_size, key, key_len, iv, iv_len, src, dst, src_len, final | |
220 | * | |
221 | * The iv variable is used as both input and output. On completion of the | |
222 | * AES operation the new IV overwrites the old IV. | |
223 | */ | |
224 | struct ccp_xts_aes_engine { | |
225 | enum ccp_aes_action action; | |
226 | enum ccp_xts_aes_unit_size unit_size; | |
227 | ||
228 | struct scatterlist *key; | |
229 | u32 key_len; /* In bytes */ | |
230 | ||
231 | struct scatterlist *iv; | |
232 | u32 iv_len; /* In bytes */ | |
233 | ||
234 | struct scatterlist *src, *dst; | |
81a59f00 | 235 | u64 src_len; /* In bytes */ |
63b94509 TL |
236 | |
237 | u32 final; | |
238 | }; | |
239 | ||
240 | /***** SHA engine *****/ | |
63b94509 TL |
241 | /** |
242 | * ccp_sha_type - type of SHA operation | |
243 | * | |
244 | * @CCP_SHA_TYPE_1: SHA-1 operation | |
245 | * @CCP_SHA_TYPE_224: SHA-224 operation | |
246 | * @CCP_SHA_TYPE_256: SHA-256 operation | |
247 | */ | |
248 | enum ccp_sha_type { | |
249 | CCP_SHA_TYPE_1 = 1, | |
250 | CCP_SHA_TYPE_224, | |
251 | CCP_SHA_TYPE_256, | |
252 | CCP_SHA_TYPE__LAST, | |
253 | }; | |
254 | ||
255 | /** | |
256 | * struct ccp_sha_engine - CCP SHA operation | |
257 | * @type: Type of SHA operation | |
258 | * @ctx: current hash value | |
259 | * @ctx_len: length in bytes of hash value | |
260 | * @src: data to be used for this operation | |
261 | * @src_len: length in bytes of data used for this operation | |
c11baa02 TL |
262 | * @opad: data to be used for final HMAC operation |
263 | * @opad_len: length in bytes of data used for final HMAC operation | |
264 | * @first: indicates first SHA operation | |
63b94509 TL |
265 | * @final: indicates final SHA operation |
266 | * @msg_bits: total length of the message in bits used in final SHA operation | |
267 | * | |
268 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
269 | * - type, ctx, ctx_len, src, src_len, final | |
270 | * - msg_bits if final is non-zero | |
271 | * | |
272 | * The ctx variable is used as both input and output. On completion of the | |
273 | * SHA operation the new hash value overwrites the old hash value. | |
274 | */ | |
275 | struct ccp_sha_engine { | |
276 | enum ccp_sha_type type; | |
277 | ||
278 | struct scatterlist *ctx; | |
279 | u32 ctx_len; /* In bytes */ | |
280 | ||
281 | struct scatterlist *src; | |
81a59f00 | 282 | u64 src_len; /* In bytes */ |
63b94509 | 283 | |
c11baa02 TL |
284 | struct scatterlist *opad; |
285 | u32 opad_len; /* In bytes */ | |
286 | ||
287 | u32 first; /* Indicates first sha cmd */ | |
63b94509 TL |
288 | u32 final; /* Indicates final sha cmd */ |
289 | u64 msg_bits; /* Message length in bits required for | |
290 | * final sha cmd */ | |
291 | }; | |
292 | ||
293 | /***** RSA engine *****/ | |
294 | /** | |
295 | * struct ccp_rsa_engine - CCP RSA operation | |
296 | * @key_size: length in bits of RSA key | |
297 | * @exp: RSA exponent | |
298 | * @exp_len: length in bytes of exponent | |
299 | * @mod: RSA modulus | |
300 | * @mod_len: length in bytes of modulus | |
301 | * @src: data to be used for this operation | |
302 | * @dst: data produced by this operation | |
303 | * @src_len: length in bytes of data used for this operation | |
304 | * | |
305 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
306 | * - key_size, exp, exp_len, mod, mod_len, src, dst, src_len | |
307 | */ | |
308 | struct ccp_rsa_engine { | |
309 | u32 key_size; /* In bits */ | |
310 | ||
311 | struct scatterlist *exp; | |
312 | u32 exp_len; /* In bytes */ | |
313 | ||
314 | struct scatterlist *mod; | |
315 | u32 mod_len; /* In bytes */ | |
316 | ||
317 | struct scatterlist *src, *dst; | |
318 | u32 src_len; /* In bytes */ | |
319 | }; | |
320 | ||
321 | /***** Passthru engine *****/ | |
322 | /** | |
323 | * ccp_passthru_bitwise - type of bitwise passthru operation | |
324 | * | |
325 | * @CCP_PASSTHRU_BITWISE_NOOP: no bitwise operation performed | |
326 | * @CCP_PASSTHRU_BITWISE_AND: perform bitwise AND of src with mask | |
327 | * @CCP_PASSTHRU_BITWISE_OR: perform bitwise OR of src with mask | |
328 | * @CCP_PASSTHRU_BITWISE_XOR: perform bitwise XOR of src with mask | |
329 | * @CCP_PASSTHRU_BITWISE_MASK: overwrite with mask | |
330 | */ | |
331 | enum ccp_passthru_bitwise { | |
332 | CCP_PASSTHRU_BITWISE_NOOP = 0, | |
333 | CCP_PASSTHRU_BITWISE_AND, | |
334 | CCP_PASSTHRU_BITWISE_OR, | |
335 | CCP_PASSTHRU_BITWISE_XOR, | |
336 | CCP_PASSTHRU_BITWISE_MASK, | |
337 | CCP_PASSTHRU_BITWISE__LAST, | |
338 | }; | |
339 | ||
340 | /** | |
341 | * ccp_passthru_byteswap - type of byteswap passthru operation | |
342 | * | |
343 | * @CCP_PASSTHRU_BYTESWAP_NOOP: no byte swapping performed | |
344 | * @CCP_PASSTHRU_BYTESWAP_32BIT: swap bytes within 32-bit words | |
345 | * @CCP_PASSTHRU_BYTESWAP_256BIT: swap bytes within 256-bit words | |
346 | */ | |
347 | enum ccp_passthru_byteswap { | |
348 | CCP_PASSTHRU_BYTESWAP_NOOP = 0, | |
349 | CCP_PASSTHRU_BYTESWAP_32BIT, | |
350 | CCP_PASSTHRU_BYTESWAP_256BIT, | |
351 | CCP_PASSTHRU_BYTESWAP__LAST, | |
352 | }; | |
353 | ||
354 | /** | |
355 | * struct ccp_passthru_engine - CCP pass-through operation | |
356 | * @bit_mod: bitwise operation to perform | |
357 | * @byte_swap: byteswap operation to perform | |
358 | * @mask: mask to be applied to data | |
359 | * @mask_len: length in bytes of mask | |
360 | * @src: data to be used for this operation | |
361 | * @dst: data produced by this operation | |
362 | * @src_len: length in bytes of data used for this operation | |
363 | * @final: indicate final pass-through operation | |
364 | * | |
365 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
366 | * - bit_mod, byte_swap, src, dst, src_len | |
367 | * - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP | |
368 | */ | |
369 | struct ccp_passthru_engine { | |
370 | enum ccp_passthru_bitwise bit_mod; | |
371 | enum ccp_passthru_byteswap byte_swap; | |
372 | ||
373 | struct scatterlist *mask; | |
374 | u32 mask_len; /* In bytes */ | |
375 | ||
376 | struct scatterlist *src, *dst; | |
81a59f00 | 377 | u64 src_len; /* In bytes */ |
63b94509 TL |
378 | |
379 | u32 final; | |
380 | }; | |
381 | ||
58ea8abf GH |
382 | /** |
383 | * struct ccp_passthru_nomap_engine - CCP pass-through operation | |
384 | * without performing DMA mapping | |
385 | * @bit_mod: bitwise operation to perform | |
386 | * @byte_swap: byteswap operation to perform | |
387 | * @mask: mask to be applied to data | |
388 | * @mask_len: length in bytes of mask | |
389 | * @src: data to be used for this operation | |
390 | * @dst: data produced by this operation | |
391 | * @src_len: length in bytes of data used for this operation | |
392 | * @final: indicate final pass-through operation | |
393 | * | |
394 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
395 | * - bit_mod, byte_swap, src, dst, src_len | |
396 | * - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP | |
397 | */ | |
398 | struct ccp_passthru_nomap_engine { | |
399 | enum ccp_passthru_bitwise bit_mod; | |
400 | enum ccp_passthru_byteswap byte_swap; | |
401 | ||
402 | dma_addr_t mask; | |
403 | u32 mask_len; /* In bytes */ | |
404 | ||
405 | dma_addr_t src_dma, dst_dma; | |
406 | u64 src_len; /* In bytes */ | |
407 | ||
408 | u32 final; | |
409 | }; | |
410 | ||
63b94509 TL |
411 | /***** ECC engine *****/ |
412 | #define CCP_ECC_MODULUS_BYTES 48 /* 384-bits */ | |
413 | #define CCP_ECC_MAX_OPERANDS 6 | |
414 | #define CCP_ECC_MAX_OUTPUTS 3 | |
415 | ||
416 | /** | |
417 | * ccp_ecc_function - type of ECC function | |
418 | * | |
419 | * @CCP_ECC_FUNCTION_MMUL_384BIT: 384-bit modular multiplication | |
420 | * @CCP_ECC_FUNCTION_MADD_384BIT: 384-bit modular addition | |
421 | * @CCP_ECC_FUNCTION_MINV_384BIT: 384-bit multiplicative inverse | |
422 | * @CCP_ECC_FUNCTION_PADD_384BIT: 384-bit point addition | |
423 | * @CCP_ECC_FUNCTION_PMUL_384BIT: 384-bit point multiplication | |
424 | * @CCP_ECC_FUNCTION_PDBL_384BIT: 384-bit point doubling | |
425 | */ | |
426 | enum ccp_ecc_function { | |
427 | CCP_ECC_FUNCTION_MMUL_384BIT = 0, | |
428 | CCP_ECC_FUNCTION_MADD_384BIT, | |
429 | CCP_ECC_FUNCTION_MINV_384BIT, | |
430 | CCP_ECC_FUNCTION_PADD_384BIT, | |
431 | CCP_ECC_FUNCTION_PMUL_384BIT, | |
432 | CCP_ECC_FUNCTION_PDBL_384BIT, | |
433 | }; | |
434 | ||
435 | /** | |
436 | * struct ccp_ecc_modular_math - CCP ECC modular math parameters | |
437 | * @operand_1: first operand for the modular math operation | |
438 | * @operand_1_len: length of the first operand | |
439 | * @operand_2: second operand for the modular math operation | |
440 | * (not used for CCP_ECC_FUNCTION_MINV_384BIT) | |
441 | * @operand_2_len: length of the second operand | |
442 | * (not used for CCP_ECC_FUNCTION_MINV_384BIT) | |
443 | * @result: result of the modular math operation | |
444 | * @result_len: length of the supplied result buffer | |
445 | */ | |
446 | struct ccp_ecc_modular_math { | |
447 | struct scatterlist *operand_1; | |
448 | unsigned int operand_1_len; /* In bytes */ | |
449 | ||
450 | struct scatterlist *operand_2; | |
451 | unsigned int operand_2_len; /* In bytes */ | |
452 | ||
453 | struct scatterlist *result; | |
454 | unsigned int result_len; /* In bytes */ | |
455 | }; | |
456 | ||
457 | /** | |
458 | * struct ccp_ecc_point - CCP ECC point definition | |
459 | * @x: the x coordinate of the ECC point | |
460 | * @x_len: the length of the x coordinate | |
461 | * @y: the y coordinate of the ECC point | |
462 | * @y_len: the length of the y coordinate | |
463 | */ | |
464 | struct ccp_ecc_point { | |
465 | struct scatterlist *x; | |
466 | unsigned int x_len; /* In bytes */ | |
467 | ||
468 | struct scatterlist *y; | |
469 | unsigned int y_len; /* In bytes */ | |
470 | }; | |
471 | ||
472 | /** | |
473 | * struct ccp_ecc_point_math - CCP ECC point math parameters | |
474 | * @point_1: the first point of the ECC point math operation | |
475 | * @point_2: the second point of the ECC point math operation | |
476 | * (only used for CCP_ECC_FUNCTION_PADD_384BIT) | |
477 | * @domain_a: the a parameter of the ECC curve | |
478 | * @domain_a_len: the length of the a parameter | |
479 | * @scalar: the scalar parameter for the point match operation | |
480 | * (only used for CCP_ECC_FUNCTION_PMUL_384BIT) | |
481 | * @scalar_len: the length of the scalar parameter | |
482 | * (only used for CCP_ECC_FUNCTION_PMUL_384BIT) | |
483 | * @result: the point resulting from the point math operation | |
484 | */ | |
485 | struct ccp_ecc_point_math { | |
486 | struct ccp_ecc_point point_1; | |
487 | struct ccp_ecc_point point_2; | |
488 | ||
489 | struct scatterlist *domain_a; | |
490 | unsigned int domain_a_len; /* In bytes */ | |
491 | ||
492 | struct scatterlist *scalar; | |
493 | unsigned int scalar_len; /* In bytes */ | |
494 | ||
495 | struct ccp_ecc_point result; | |
496 | }; | |
497 | ||
498 | /** | |
499 | * struct ccp_ecc_engine - CCP ECC operation | |
500 | * @function: ECC function to perform | |
501 | * @mod: ECC modulus | |
502 | * @mod_len: length in bytes of modulus | |
503 | * @mm: module math parameters | |
504 | * @pm: point math parameters | |
505 | * @ecc_result: result of the ECC operation | |
506 | * | |
507 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
508 | * - function, mod, mod_len | |
509 | * - operand, operand_len, operand_count, output, output_len, output_count | |
510 | * - ecc_result | |
511 | */ | |
512 | struct ccp_ecc_engine { | |
513 | enum ccp_ecc_function function; | |
514 | ||
515 | struct scatterlist *mod; | |
516 | u32 mod_len; /* In bytes */ | |
517 | ||
518 | union { | |
519 | struct ccp_ecc_modular_math mm; | |
520 | struct ccp_ecc_point_math pm; | |
521 | } u; | |
522 | ||
523 | u16 ecc_result; | |
524 | }; | |
525 | ||
526 | ||
527 | /** | |
528 | * ccp_engine - CCP operation identifiers | |
529 | * | |
530 | * @CCP_ENGINE_AES: AES operation | |
531 | * @CCP_ENGINE_XTS_AES: 128-bit XTS AES operation | |
532 | * @CCP_ENGINE_RSVD1: unused | |
533 | * @CCP_ENGINE_SHA: SHA operation | |
534 | * @CCP_ENGINE_RSA: RSA operation | |
535 | * @CCP_ENGINE_PASSTHRU: pass-through operation | |
536 | * @CCP_ENGINE_ZLIB_DECOMPRESS: unused | |
537 | * @CCP_ENGINE_ECC: ECC operation | |
538 | */ | |
539 | enum ccp_engine { | |
540 | CCP_ENGINE_AES = 0, | |
541 | CCP_ENGINE_XTS_AES_128, | |
542 | CCP_ENGINE_RSVD1, | |
543 | CCP_ENGINE_SHA, | |
544 | CCP_ENGINE_RSA, | |
545 | CCP_ENGINE_PASSTHRU, | |
546 | CCP_ENGINE_ZLIB_DECOMPRESS, | |
547 | CCP_ENGINE_ECC, | |
548 | CCP_ENGINE__LAST, | |
549 | }; | |
550 | ||
551 | /* Flag values for flags member of ccp_cmd */ | |
58ea8abf GH |
552 | #define CCP_CMD_MAY_BACKLOG 0x00000001 |
553 | #define CCP_CMD_PASSTHRU_NO_DMA_MAP 0x00000002 | |
63b94509 TL |
554 | |
555 | /** | |
c8d283ff | 556 | * struct ccp_cmd - CCP operation request |
63b94509 TL |
557 | * @entry: list element (ccp driver use only) |
558 | * @work: work element used for callbacks (ccp driver use only) | |
559 | * @ccp: CCP device to be run on (ccp driver use only) | |
560 | * @ret: operation return code (ccp driver use only) | |
561 | * @flags: cmd processing flags | |
562 | * @engine: CCP operation to perform | |
563 | * @engine_error: CCP engine return code | |
564 | * @u: engine specific structures, refer to specific engine struct below | |
565 | * @callback: operation completion callback function | |
566 | * @data: parameter value to be supplied to the callback function | |
567 | * | |
568 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
569 | * - engine, callback | |
570 | * - See the operation structures below for what is required for each | |
571 | * operation. | |
572 | */ | |
573 | struct ccp_cmd { | |
574 | /* The list_head, work_struct, ccp and ret variables are for use | |
575 | * by the CCP driver only. | |
576 | */ | |
577 | struct list_head entry; | |
578 | struct work_struct work; | |
579 | struct ccp_device *ccp; | |
580 | int ret; | |
581 | ||
582 | u32 flags; | |
583 | ||
584 | enum ccp_engine engine; | |
585 | u32 engine_error; | |
586 | ||
587 | union { | |
588 | struct ccp_aes_engine aes; | |
589 | struct ccp_xts_aes_engine xts; | |
590 | struct ccp_sha_engine sha; | |
591 | struct ccp_rsa_engine rsa; | |
592 | struct ccp_passthru_engine passthru; | |
58ea8abf | 593 | struct ccp_passthru_nomap_engine passthru_nomap; |
63b94509 TL |
594 | struct ccp_ecc_engine ecc; |
595 | } u; | |
596 | ||
597 | /* Completion callback support */ | |
598 | void (*callback)(void *data, int err); | |
599 | void *data; | |
600 | }; | |
601 | ||
602 | #endif |