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63b94509 TL |
1 | /* |
2 | * AMD Cryptographic Coprocessor (CCP) driver | |
3 | * | |
e652399e | 4 | * Copyright (C) 2013,2017 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 | ||
63b94509 TL |
23 | struct ccp_device; |
24 | struct ccp_cmd; | |
25 | ||
720419f0 | 26 | #if defined(CONFIG_CRYPTO_DEV_SP_CCP) |
db34cf91 | 27 | |
c9f21cb6 TL |
28 | /** |
29 | * ccp_present - check if a CCP device is present | |
30 | * | |
31 | * Returns zero if a CCP device is present, -ENODEV otherwise. | |
32 | */ | |
33 | int ccp_present(void); | |
34 | ||
c7019c4d GH |
35 | #define CCP_VSIZE 16 |
36 | #define CCP_VMASK ((unsigned int)((1 << CCP_VSIZE) - 1)) | |
37 | #define CCP_VERSION(v, r) ((unsigned int)((v << CCP_VSIZE) \ | |
38 | | (r & CCP_VMASK))) | |
39 | ||
40 | /** | |
41 | * ccp_version - get the version of the CCP | |
42 | * | |
43 | * Returns a positive version number, or zero if no CCP | |
44 | */ | |
45 | unsigned int ccp_version(void); | |
46 | ||
63b94509 TL |
47 | /** |
48 | * ccp_enqueue_cmd - queue an operation for processing by the CCP | |
49 | * | |
50 | * @cmd: ccp_cmd struct to be processed | |
51 | * | |
52 | * Refer to the ccp_cmd struct below for required fields. | |
53 | * | |
54 | * Queue a cmd to be processed by the CCP. If queueing the cmd | |
55 | * would exceed the defined length of the cmd queue the cmd will | |
56 | * only be queued if the CCP_CMD_MAY_BACKLOG flag is set and will | |
57 | * result in a return code of -EBUSY. | |
58 | * | |
59 | * The callback routine specified in the ccp_cmd struct will be | |
60 | * called to notify the caller of completion (if the cmd was not | |
61 | * backlogged) or advancement out of the backlog. If the cmd has | |
62 | * advanced out of the backlog the "err" value of the callback | |
63 | * will be -EINPROGRESS. Any other "err" value during callback is | |
64 | * the result of the operation. | |
65 | * | |
66 | * The cmd has been successfully queued if: | |
67 | * the return code is -EINPROGRESS or | |
68 | * the return code is -EBUSY and CCP_CMD_MAY_BACKLOG flag is set | |
69 | */ | |
70 | int ccp_enqueue_cmd(struct ccp_cmd *cmd); | |
71 | ||
720419f0 | 72 | #else /* CONFIG_CRYPTO_DEV_CCP_SP_DEV is not enabled */ |
db34cf91 | 73 | |
c9f21cb6 TL |
74 | static inline int ccp_present(void) |
75 | { | |
76 | return -ENODEV; | |
77 | } | |
78 | ||
c7019c4d GH |
79 | static inline unsigned int ccp_version(void) |
80 | { | |
81 | return 0; | |
82 | } | |
83 | ||
db34cf91 TL |
84 | static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd) |
85 | { | |
86 | return -ENODEV; | |
87 | } | |
88 | ||
720419f0 | 89 | #endif /* CONFIG_CRYPTO_DEV_SP_CCP */ |
db34cf91 | 90 | |
63b94509 TL |
91 | |
92 | /***** AES engine *****/ | |
93 | /** | |
94 | * ccp_aes_type - AES key size | |
95 | * | |
96 | * @CCP_AES_TYPE_128: 128-bit key | |
97 | * @CCP_AES_TYPE_192: 192-bit key | |
98 | * @CCP_AES_TYPE_256: 256-bit key | |
99 | */ | |
100 | enum ccp_aes_type { | |
101 | CCP_AES_TYPE_128 = 0, | |
102 | CCP_AES_TYPE_192, | |
103 | CCP_AES_TYPE_256, | |
104 | CCP_AES_TYPE__LAST, | |
105 | }; | |
106 | ||
107 | /** | |
108 | * ccp_aes_mode - AES operation mode | |
109 | * | |
110 | * @CCP_AES_MODE_ECB: ECB mode | |
111 | * @CCP_AES_MODE_CBC: CBC mode | |
112 | * @CCP_AES_MODE_OFB: OFB mode | |
113 | * @CCP_AES_MODE_CFB: CFB mode | |
114 | * @CCP_AES_MODE_CTR: CTR mode | |
115 | * @CCP_AES_MODE_CMAC: CMAC mode | |
116 | */ | |
117 | enum ccp_aes_mode { | |
118 | CCP_AES_MODE_ECB = 0, | |
119 | CCP_AES_MODE_CBC, | |
120 | CCP_AES_MODE_OFB, | |
121 | CCP_AES_MODE_CFB, | |
122 | CCP_AES_MODE_CTR, | |
123 | CCP_AES_MODE_CMAC, | |
36cf515b GH |
124 | CCP_AES_MODE_GHASH, |
125 | CCP_AES_MODE_GCTR, | |
126 | CCP_AES_MODE_GCM, | |
127 | CCP_AES_MODE_GMAC, | |
63b94509 TL |
128 | CCP_AES_MODE__LAST, |
129 | }; | |
130 | ||
131 | /** | |
132 | * ccp_aes_mode - AES operation mode | |
133 | * | |
134 | * @CCP_AES_ACTION_DECRYPT: AES decrypt operation | |
135 | * @CCP_AES_ACTION_ENCRYPT: AES encrypt operation | |
136 | */ | |
137 | enum ccp_aes_action { | |
138 | CCP_AES_ACTION_DECRYPT = 0, | |
139 | CCP_AES_ACTION_ENCRYPT, | |
140 | CCP_AES_ACTION__LAST, | |
141 | }; | |
36cf515b GH |
142 | /* Overloaded field */ |
143 | #define CCP_AES_GHASHAAD CCP_AES_ACTION_DECRYPT | |
144 | #define CCP_AES_GHASHFINAL CCP_AES_ACTION_ENCRYPT | |
63b94509 TL |
145 | |
146 | /** | |
147 | * struct ccp_aes_engine - CCP AES operation | |
148 | * @type: AES operation key size | |
149 | * @mode: AES operation mode | |
150 | * @action: AES operation (decrypt/encrypt) | |
151 | * @key: key to be used for this AES operation | |
152 | * @key_len: length in bytes of key | |
153 | * @iv: IV to be used for this AES operation | |
154 | * @iv_len: length in bytes of iv | |
155 | * @src: data to be used for this operation | |
156 | * @dst: data produced by this operation | |
157 | * @src_len: length in bytes of data used for this operation | |
158 | * @cmac_final: indicates final operation when running in CMAC mode | |
159 | * @cmac_key: K1/K2 key used in final CMAC operation | |
160 | * @cmac_key_len: length in bytes of cmac_key | |
161 | * | |
162 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
163 | * - type, mode, action, key, key_len, src, dst, src_len | |
164 | * - iv, iv_len for any mode other than ECB | |
165 | * - cmac_final for CMAC mode | |
166 | * - cmac_key, cmac_key_len for CMAC mode if cmac_final is non-zero | |
167 | * | |
168 | * The iv variable is used as both input and output. On completion of the | |
169 | * AES operation the new IV overwrites the old IV. | |
170 | */ | |
171 | struct ccp_aes_engine { | |
172 | enum ccp_aes_type type; | |
173 | enum ccp_aes_mode mode; | |
174 | enum ccp_aes_action action; | |
175 | ||
9f00baf7 GH |
176 | u32 authsize; |
177 | ||
63b94509 TL |
178 | struct scatterlist *key; |
179 | u32 key_len; /* In bytes */ | |
180 | ||
181 | struct scatterlist *iv; | |
182 | u32 iv_len; /* In bytes */ | |
183 | ||
184 | struct scatterlist *src, *dst; | |
81a59f00 | 185 | u64 src_len; /* In bytes */ |
63b94509 TL |
186 | |
187 | u32 cmac_final; /* Indicates final cmac cmd */ | |
188 | struct scatterlist *cmac_key; /* K1/K2 cmac key required for | |
189 | * final cmac cmd */ | |
190 | u32 cmac_key_len; /* In bytes */ | |
36cf515b GH |
191 | |
192 | u32 aad_len; /* In bytes */ | |
63b94509 TL |
193 | }; |
194 | ||
195 | /***** XTS-AES engine *****/ | |
196 | /** | |
197 | * ccp_xts_aes_unit_size - XTS unit size | |
198 | * | |
199 | * @CCP_XTS_AES_UNIT_SIZE_16: Unit size of 16 bytes | |
200 | * @CCP_XTS_AES_UNIT_SIZE_512: Unit size of 512 bytes | |
201 | * @CCP_XTS_AES_UNIT_SIZE_1024: Unit size of 1024 bytes | |
202 | * @CCP_XTS_AES_UNIT_SIZE_2048: Unit size of 2048 bytes | |
203 | * @CCP_XTS_AES_UNIT_SIZE_4096: Unit size of 4096 bytes | |
204 | */ | |
205 | enum ccp_xts_aes_unit_size { | |
206 | CCP_XTS_AES_UNIT_SIZE_16 = 0, | |
207 | CCP_XTS_AES_UNIT_SIZE_512, | |
208 | CCP_XTS_AES_UNIT_SIZE_1024, | |
209 | CCP_XTS_AES_UNIT_SIZE_2048, | |
210 | CCP_XTS_AES_UNIT_SIZE_4096, | |
211 | CCP_XTS_AES_UNIT_SIZE__LAST, | |
212 | }; | |
213 | ||
214 | /** | |
215 | * struct ccp_xts_aes_engine - CCP XTS AES operation | |
216 | * @action: AES operation (decrypt/encrypt) | |
217 | * @unit_size: unit size of the XTS operation | |
218 | * @key: key to be used for this XTS AES operation | |
219 | * @key_len: length in bytes of key | |
220 | * @iv: IV to be used for this XTS AES operation | |
221 | * @iv_len: length in bytes of iv | |
222 | * @src: data to be used for this operation | |
223 | * @dst: data produced by this operation | |
224 | * @src_len: length in bytes of data used for this operation | |
225 | * @final: indicates final XTS operation | |
226 | * | |
227 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
228 | * - action, unit_size, key, key_len, iv, iv_len, src, dst, src_len, final | |
229 | * | |
230 | * The iv variable is used as both input and output. On completion of the | |
231 | * AES operation the new IV overwrites the old IV. | |
232 | */ | |
233 | struct ccp_xts_aes_engine { | |
e652399e | 234 | enum ccp_aes_type type; |
63b94509 TL |
235 | enum ccp_aes_action action; |
236 | enum ccp_xts_aes_unit_size unit_size; | |
237 | ||
238 | struct scatterlist *key; | |
239 | u32 key_len; /* In bytes */ | |
240 | ||
241 | struct scatterlist *iv; | |
242 | u32 iv_len; /* In bytes */ | |
243 | ||
244 | struct scatterlist *src, *dst; | |
81a59f00 | 245 | u64 src_len; /* In bytes */ |
63b94509 TL |
246 | |
247 | u32 final; | |
248 | }; | |
249 | ||
250 | /***** SHA engine *****/ | |
63b94509 TL |
251 | /** |
252 | * ccp_sha_type - type of SHA operation | |
253 | * | |
254 | * @CCP_SHA_TYPE_1: SHA-1 operation | |
255 | * @CCP_SHA_TYPE_224: SHA-224 operation | |
256 | * @CCP_SHA_TYPE_256: SHA-256 operation | |
257 | */ | |
258 | enum ccp_sha_type { | |
259 | CCP_SHA_TYPE_1 = 1, | |
260 | CCP_SHA_TYPE_224, | |
261 | CCP_SHA_TYPE_256, | |
ccebcf3f GH |
262 | CCP_SHA_TYPE_384, |
263 | CCP_SHA_TYPE_512, | |
63b94509 TL |
264 | CCP_SHA_TYPE__LAST, |
265 | }; | |
266 | ||
267 | /** | |
268 | * struct ccp_sha_engine - CCP SHA operation | |
269 | * @type: Type of SHA operation | |
270 | * @ctx: current hash value | |
271 | * @ctx_len: length in bytes of hash value | |
272 | * @src: data to be used for this operation | |
273 | * @src_len: length in bytes of data used for this operation | |
c11baa02 TL |
274 | * @opad: data to be used for final HMAC operation |
275 | * @opad_len: length in bytes of data used for final HMAC operation | |
276 | * @first: indicates first SHA operation | |
63b94509 TL |
277 | * @final: indicates final SHA operation |
278 | * @msg_bits: total length of the message in bits used in final SHA operation | |
279 | * | |
280 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
281 | * - type, ctx, ctx_len, src, src_len, final | |
282 | * - msg_bits if final is non-zero | |
283 | * | |
284 | * The ctx variable is used as both input and output. On completion of the | |
285 | * SHA operation the new hash value overwrites the old hash value. | |
286 | */ | |
287 | struct ccp_sha_engine { | |
288 | enum ccp_sha_type type; | |
289 | ||
290 | struct scatterlist *ctx; | |
291 | u32 ctx_len; /* In bytes */ | |
292 | ||
293 | struct scatterlist *src; | |
81a59f00 | 294 | u64 src_len; /* In bytes */ |
63b94509 | 295 | |
c11baa02 TL |
296 | struct scatterlist *opad; |
297 | u32 opad_len; /* In bytes */ | |
298 | ||
299 | u32 first; /* Indicates first sha cmd */ | |
63b94509 TL |
300 | u32 final; /* Indicates final sha cmd */ |
301 | u64 msg_bits; /* Message length in bits required for | |
302 | * final sha cmd */ | |
303 | }; | |
304 | ||
990672d4 GH |
305 | /***** 3DES engine *****/ |
306 | enum ccp_des3_mode { | |
307 | CCP_DES3_MODE_ECB = 0, | |
308 | CCP_DES3_MODE_CBC, | |
309 | CCP_DES3_MODE_CFB, | |
310 | CCP_DES3_MODE__LAST, | |
311 | }; | |
312 | ||
313 | enum ccp_des3_type { | |
314 | CCP_DES3_TYPE_168 = 1, | |
315 | CCP_DES3_TYPE__LAST, | |
316 | }; | |
317 | ||
318 | enum ccp_des3_action { | |
319 | CCP_DES3_ACTION_DECRYPT = 0, | |
320 | CCP_DES3_ACTION_ENCRYPT, | |
321 | CCP_DES3_ACTION__LAST, | |
322 | }; | |
323 | ||
324 | /** | |
325 | * struct ccp_des3_engine - CCP SHA operation | |
326 | * @type: Type of 3DES operation | |
327 | * @mode: cipher mode | |
328 | * @action: 3DES operation (decrypt/encrypt) | |
329 | * @key: key to be used for this 3DES operation | |
330 | * @key_len: length of key (in bytes) | |
331 | * @iv: IV to be used for this AES operation | |
332 | * @iv_len: length in bytes of iv | |
333 | * @src: input data to be used for this operation | |
334 | * @src_len: length of input data used for this operation (in bytes) | |
335 | * @dst: output data produced by this operation | |
336 | * | |
337 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
338 | * - type, mode, action, key, key_len, src, dst, src_len | |
339 | * - iv, iv_len for any mode other than ECB | |
340 | * | |
341 | * The iv variable is used as both input and output. On completion of the | |
342 | * 3DES operation the new IV overwrites the old IV. | |
343 | */ | |
344 | struct ccp_des3_engine { | |
345 | enum ccp_des3_type type; | |
346 | enum ccp_des3_mode mode; | |
347 | enum ccp_des3_action action; | |
348 | ||
349 | struct scatterlist *key; | |
350 | u32 key_len; /* In bytes */ | |
351 | ||
352 | struct scatterlist *iv; | |
353 | u32 iv_len; /* In bytes */ | |
354 | ||
355 | struct scatterlist *src, *dst; | |
356 | u64 src_len; /* In bytes */ | |
357 | }; | |
358 | ||
63b94509 TL |
359 | /***** RSA engine *****/ |
360 | /** | |
361 | * struct ccp_rsa_engine - CCP RSA operation | |
362 | * @key_size: length in bits of RSA key | |
363 | * @exp: RSA exponent | |
364 | * @exp_len: length in bytes of exponent | |
365 | * @mod: RSA modulus | |
366 | * @mod_len: length in bytes of modulus | |
367 | * @src: data to be used for this operation | |
368 | * @dst: data produced by this operation | |
369 | * @src_len: length in bytes of data used for this operation | |
370 | * | |
371 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
372 | * - key_size, exp, exp_len, mod, mod_len, src, dst, src_len | |
373 | */ | |
374 | struct ccp_rsa_engine { | |
375 | u32 key_size; /* In bits */ | |
376 | ||
377 | struct scatterlist *exp; | |
378 | u32 exp_len; /* In bytes */ | |
379 | ||
380 | struct scatterlist *mod; | |
381 | u32 mod_len; /* In bytes */ | |
382 | ||
383 | struct scatterlist *src, *dst; | |
384 | u32 src_len; /* In bytes */ | |
385 | }; | |
386 | ||
387 | /***** Passthru engine *****/ | |
388 | /** | |
389 | * ccp_passthru_bitwise - type of bitwise passthru operation | |
390 | * | |
391 | * @CCP_PASSTHRU_BITWISE_NOOP: no bitwise operation performed | |
392 | * @CCP_PASSTHRU_BITWISE_AND: perform bitwise AND of src with mask | |
393 | * @CCP_PASSTHRU_BITWISE_OR: perform bitwise OR of src with mask | |
394 | * @CCP_PASSTHRU_BITWISE_XOR: perform bitwise XOR of src with mask | |
395 | * @CCP_PASSTHRU_BITWISE_MASK: overwrite with mask | |
396 | */ | |
397 | enum ccp_passthru_bitwise { | |
398 | CCP_PASSTHRU_BITWISE_NOOP = 0, | |
399 | CCP_PASSTHRU_BITWISE_AND, | |
400 | CCP_PASSTHRU_BITWISE_OR, | |
401 | CCP_PASSTHRU_BITWISE_XOR, | |
402 | CCP_PASSTHRU_BITWISE_MASK, | |
403 | CCP_PASSTHRU_BITWISE__LAST, | |
404 | }; | |
405 | ||
406 | /** | |
407 | * ccp_passthru_byteswap - type of byteswap passthru operation | |
408 | * | |
409 | * @CCP_PASSTHRU_BYTESWAP_NOOP: no byte swapping performed | |
410 | * @CCP_PASSTHRU_BYTESWAP_32BIT: swap bytes within 32-bit words | |
411 | * @CCP_PASSTHRU_BYTESWAP_256BIT: swap bytes within 256-bit words | |
412 | */ | |
413 | enum ccp_passthru_byteswap { | |
414 | CCP_PASSTHRU_BYTESWAP_NOOP = 0, | |
415 | CCP_PASSTHRU_BYTESWAP_32BIT, | |
416 | CCP_PASSTHRU_BYTESWAP_256BIT, | |
417 | CCP_PASSTHRU_BYTESWAP__LAST, | |
418 | }; | |
419 | ||
420 | /** | |
421 | * struct ccp_passthru_engine - CCP pass-through operation | |
422 | * @bit_mod: bitwise operation to perform | |
423 | * @byte_swap: byteswap operation to perform | |
424 | * @mask: mask to be applied to data | |
425 | * @mask_len: length in bytes of mask | |
426 | * @src: data to be used for this operation | |
427 | * @dst: data produced by this operation | |
428 | * @src_len: length in bytes of data used for this operation | |
429 | * @final: indicate final pass-through operation | |
430 | * | |
431 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
432 | * - bit_mod, byte_swap, src, dst, src_len | |
433 | * - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP | |
434 | */ | |
435 | struct ccp_passthru_engine { | |
436 | enum ccp_passthru_bitwise bit_mod; | |
437 | enum ccp_passthru_byteswap byte_swap; | |
438 | ||
439 | struct scatterlist *mask; | |
440 | u32 mask_len; /* In bytes */ | |
441 | ||
442 | struct scatterlist *src, *dst; | |
81a59f00 | 443 | u64 src_len; /* In bytes */ |
63b94509 TL |
444 | |
445 | u32 final; | |
446 | }; | |
447 | ||
58ea8abf GH |
448 | /** |
449 | * struct ccp_passthru_nomap_engine - CCP pass-through operation | |
450 | * without performing DMA mapping | |
451 | * @bit_mod: bitwise operation to perform | |
452 | * @byte_swap: byteswap operation to perform | |
453 | * @mask: mask to be applied to data | |
454 | * @mask_len: length in bytes of mask | |
455 | * @src: data to be used for this operation | |
456 | * @dst: data produced by this operation | |
457 | * @src_len: length in bytes of data used for this operation | |
458 | * @final: indicate final pass-through operation | |
459 | * | |
460 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
461 | * - bit_mod, byte_swap, src, dst, src_len | |
462 | * - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP | |
463 | */ | |
464 | struct ccp_passthru_nomap_engine { | |
465 | enum ccp_passthru_bitwise bit_mod; | |
466 | enum ccp_passthru_byteswap byte_swap; | |
467 | ||
468 | dma_addr_t mask; | |
469 | u32 mask_len; /* In bytes */ | |
470 | ||
471 | dma_addr_t src_dma, dst_dma; | |
472 | u64 src_len; /* In bytes */ | |
473 | ||
474 | u32 final; | |
475 | }; | |
476 | ||
63b94509 TL |
477 | /***** ECC engine *****/ |
478 | #define CCP_ECC_MODULUS_BYTES 48 /* 384-bits */ | |
479 | #define CCP_ECC_MAX_OPERANDS 6 | |
480 | #define CCP_ECC_MAX_OUTPUTS 3 | |
481 | ||
482 | /** | |
483 | * ccp_ecc_function - type of ECC function | |
484 | * | |
485 | * @CCP_ECC_FUNCTION_MMUL_384BIT: 384-bit modular multiplication | |
486 | * @CCP_ECC_FUNCTION_MADD_384BIT: 384-bit modular addition | |
487 | * @CCP_ECC_FUNCTION_MINV_384BIT: 384-bit multiplicative inverse | |
488 | * @CCP_ECC_FUNCTION_PADD_384BIT: 384-bit point addition | |
489 | * @CCP_ECC_FUNCTION_PMUL_384BIT: 384-bit point multiplication | |
490 | * @CCP_ECC_FUNCTION_PDBL_384BIT: 384-bit point doubling | |
491 | */ | |
492 | enum ccp_ecc_function { | |
493 | CCP_ECC_FUNCTION_MMUL_384BIT = 0, | |
494 | CCP_ECC_FUNCTION_MADD_384BIT, | |
495 | CCP_ECC_FUNCTION_MINV_384BIT, | |
496 | CCP_ECC_FUNCTION_PADD_384BIT, | |
497 | CCP_ECC_FUNCTION_PMUL_384BIT, | |
498 | CCP_ECC_FUNCTION_PDBL_384BIT, | |
499 | }; | |
500 | ||
501 | /** | |
502 | * struct ccp_ecc_modular_math - CCP ECC modular math parameters | |
503 | * @operand_1: first operand for the modular math operation | |
504 | * @operand_1_len: length of the first operand | |
505 | * @operand_2: second operand for the modular math operation | |
506 | * (not used for CCP_ECC_FUNCTION_MINV_384BIT) | |
507 | * @operand_2_len: length of the second operand | |
508 | * (not used for CCP_ECC_FUNCTION_MINV_384BIT) | |
509 | * @result: result of the modular math operation | |
510 | * @result_len: length of the supplied result buffer | |
511 | */ | |
512 | struct ccp_ecc_modular_math { | |
513 | struct scatterlist *operand_1; | |
514 | unsigned int operand_1_len; /* In bytes */ | |
515 | ||
516 | struct scatterlist *operand_2; | |
517 | unsigned int operand_2_len; /* In bytes */ | |
518 | ||
519 | struct scatterlist *result; | |
520 | unsigned int result_len; /* In bytes */ | |
521 | }; | |
522 | ||
523 | /** | |
524 | * struct ccp_ecc_point - CCP ECC point definition | |
525 | * @x: the x coordinate of the ECC point | |
526 | * @x_len: the length of the x coordinate | |
527 | * @y: the y coordinate of the ECC point | |
528 | * @y_len: the length of the y coordinate | |
529 | */ | |
530 | struct ccp_ecc_point { | |
531 | struct scatterlist *x; | |
532 | unsigned int x_len; /* In bytes */ | |
533 | ||
534 | struct scatterlist *y; | |
535 | unsigned int y_len; /* In bytes */ | |
536 | }; | |
537 | ||
538 | /** | |
539 | * struct ccp_ecc_point_math - CCP ECC point math parameters | |
540 | * @point_1: the first point of the ECC point math operation | |
541 | * @point_2: the second point of the ECC point math operation | |
542 | * (only used for CCP_ECC_FUNCTION_PADD_384BIT) | |
543 | * @domain_a: the a parameter of the ECC curve | |
544 | * @domain_a_len: the length of the a parameter | |
545 | * @scalar: the scalar parameter for the point match operation | |
546 | * (only used for CCP_ECC_FUNCTION_PMUL_384BIT) | |
547 | * @scalar_len: the length of the scalar parameter | |
548 | * (only used for CCP_ECC_FUNCTION_PMUL_384BIT) | |
549 | * @result: the point resulting from the point math operation | |
550 | */ | |
551 | struct ccp_ecc_point_math { | |
552 | struct ccp_ecc_point point_1; | |
553 | struct ccp_ecc_point point_2; | |
554 | ||
555 | struct scatterlist *domain_a; | |
556 | unsigned int domain_a_len; /* In bytes */ | |
557 | ||
558 | struct scatterlist *scalar; | |
559 | unsigned int scalar_len; /* In bytes */ | |
560 | ||
561 | struct ccp_ecc_point result; | |
562 | }; | |
563 | ||
564 | /** | |
565 | * struct ccp_ecc_engine - CCP ECC operation | |
566 | * @function: ECC function to perform | |
567 | * @mod: ECC modulus | |
568 | * @mod_len: length in bytes of modulus | |
569 | * @mm: module math parameters | |
570 | * @pm: point math parameters | |
571 | * @ecc_result: result of the ECC operation | |
572 | * | |
573 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
574 | * - function, mod, mod_len | |
575 | * - operand, operand_len, operand_count, output, output_len, output_count | |
576 | * - ecc_result | |
577 | */ | |
578 | struct ccp_ecc_engine { | |
579 | enum ccp_ecc_function function; | |
580 | ||
581 | struct scatterlist *mod; | |
582 | u32 mod_len; /* In bytes */ | |
583 | ||
584 | union { | |
585 | struct ccp_ecc_modular_math mm; | |
586 | struct ccp_ecc_point_math pm; | |
587 | } u; | |
588 | ||
589 | u16 ecc_result; | |
590 | }; | |
591 | ||
592 | ||
593 | /** | |
594 | * ccp_engine - CCP operation identifiers | |
595 | * | |
596 | * @CCP_ENGINE_AES: AES operation | |
597 | * @CCP_ENGINE_XTS_AES: 128-bit XTS AES operation | |
598 | * @CCP_ENGINE_RSVD1: unused | |
599 | * @CCP_ENGINE_SHA: SHA operation | |
600 | * @CCP_ENGINE_RSA: RSA operation | |
601 | * @CCP_ENGINE_PASSTHRU: pass-through operation | |
602 | * @CCP_ENGINE_ZLIB_DECOMPRESS: unused | |
603 | * @CCP_ENGINE_ECC: ECC operation | |
604 | */ | |
605 | enum ccp_engine { | |
606 | CCP_ENGINE_AES = 0, | |
607 | CCP_ENGINE_XTS_AES_128, | |
990672d4 | 608 | CCP_ENGINE_DES3, |
63b94509 TL |
609 | CCP_ENGINE_SHA, |
610 | CCP_ENGINE_RSA, | |
611 | CCP_ENGINE_PASSTHRU, | |
612 | CCP_ENGINE_ZLIB_DECOMPRESS, | |
613 | CCP_ENGINE_ECC, | |
614 | CCP_ENGINE__LAST, | |
615 | }; | |
616 | ||
617 | /* Flag values for flags member of ccp_cmd */ | |
58ea8abf GH |
618 | #define CCP_CMD_MAY_BACKLOG 0x00000001 |
619 | #define CCP_CMD_PASSTHRU_NO_DMA_MAP 0x00000002 | |
63b94509 TL |
620 | |
621 | /** | |
c8d283ff | 622 | * struct ccp_cmd - CCP operation request |
63b94509 TL |
623 | * @entry: list element (ccp driver use only) |
624 | * @work: work element used for callbacks (ccp driver use only) | |
7c468447 | 625 | * @ccp: CCP device to be run on |
63b94509 TL |
626 | * @ret: operation return code (ccp driver use only) |
627 | * @flags: cmd processing flags | |
628 | * @engine: CCP operation to perform | |
629 | * @engine_error: CCP engine return code | |
630 | * @u: engine specific structures, refer to specific engine struct below | |
631 | * @callback: operation completion callback function | |
632 | * @data: parameter value to be supplied to the callback function | |
633 | * | |
634 | * Variables required to be set when calling ccp_enqueue_cmd(): | |
635 | * - engine, callback | |
636 | * - See the operation structures below for what is required for each | |
637 | * operation. | |
638 | */ | |
639 | struct ccp_cmd { | |
640 | /* The list_head, work_struct, ccp and ret variables are for use | |
641 | * by the CCP driver only. | |
642 | */ | |
643 | struct list_head entry; | |
644 | struct work_struct work; | |
645 | struct ccp_device *ccp; | |
646 | int ret; | |
647 | ||
648 | u32 flags; | |
649 | ||
650 | enum ccp_engine engine; | |
651 | u32 engine_error; | |
652 | ||
653 | union { | |
654 | struct ccp_aes_engine aes; | |
655 | struct ccp_xts_aes_engine xts; | |
990672d4 | 656 | struct ccp_des3_engine des3; |
63b94509 TL |
657 | struct ccp_sha_engine sha; |
658 | struct ccp_rsa_engine rsa; | |
659 | struct ccp_passthru_engine passthru; | |
58ea8abf | 660 | struct ccp_passthru_nomap_engine passthru_nomap; |
63b94509 TL |
661 | struct ccp_ecc_engine ecc; |
662 | } u; | |
663 | ||
664 | /* Completion callback support */ | |
665 | void (*callback)(void *data, int err); | |
666 | void *data; | |
667 | }; | |
668 | ||
669 | #endif |