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Tom Lendacky63b94502013-11-12 11:46:16 -06001/*
2 * AMD Cryptographic Coprocessor (CCP) driver
3 *
Gary R Hooke6523992017-07-25 14:12:11 -05004 * Copyright (C) 2013,2017 Advanced Micro Devices, Inc.
Tom Lendacky63b94502013-11-12 11:46:16 -06005 *
6 * Author: Tom Lendacky <thomas.lendacky@amd.com>
Gary R Hook58ea8ab2016-04-18 09:21:44 -05007 * Author: Gary R Hook <gary.hook@amd.com>
Tom Lendacky63b94502013-11-12 11:46:16 -06008 *
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
Paul Bollec8d283ff2016-10-20 21:20:59 +020014#ifndef __CCP_H__
15#define __CCP_H__
Tom Lendacky63b94502013-11-12 11:46:16 -060016
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
Tom Lendacky63b94502013-11-12 11:46:16 -060023struct ccp_device;
24struct ccp_cmd;
25
Brijesh Singh720419f2017-07-06 09:59:14 -050026#if defined(CONFIG_CRYPTO_DEV_SP_CCP)
Tom Lendackydb34cf92014-01-06 13:34:29 -060027
Tom Lendacky63b94502013-11-12 11:46:16 -060028/**
Tom Lendackyc9f21cb2014-09-05 10:31:09 -050029 * ccp_present - check if a CCP device is present
30 *
31 * Returns zero if a CCP device is present, -ENODEV otherwise.
32 */
33int ccp_present(void);
34
Gary R Hookc7019c42016-03-01 13:49:15 -060035#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 */
45unsigned int ccp_version(void);
46
Tom Lendackyc9f21cb2014-09-05 10:31:09 -050047/**
Tom Lendacky63b94502013-11-12 11:46:16 -060048 * 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 */
70int ccp_enqueue_cmd(struct ccp_cmd *cmd);
71
Brijesh Singh720419f2017-07-06 09:59:14 -050072#else /* CONFIG_CRYPTO_DEV_CCP_SP_DEV is not enabled */
Tom Lendackydb34cf92014-01-06 13:34:29 -060073
Tom Lendackyc9f21cb2014-09-05 10:31:09 -050074static inline int ccp_present(void)
75{
76 return -ENODEV;
77}
78
Gary R Hookc7019c42016-03-01 13:49:15 -060079static inline unsigned int ccp_version(void)
80{
81 return 0;
82}
83
Tom Lendackydb34cf92014-01-06 13:34:29 -060084static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd)
85{
86 return -ENODEV;
87}
88
Brijesh Singh720419f2017-07-06 09:59:14 -050089#endif /* CONFIG_CRYPTO_DEV_SP_CCP */
Tom Lendackydb34cf92014-01-06 13:34:29 -060090
Tom Lendacky63b94502013-11-12 11:46:16 -060091
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 */
100enum 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 */
117enum 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,
Gary R Hook36cf5152017-03-15 13:21:01 -0500124 CCP_AES_MODE_GHASH,
125 CCP_AES_MODE_GCTR,
126 CCP_AES_MODE_GCM,
127 CCP_AES_MODE_GMAC,
Tom Lendacky63b94502013-11-12 11:46:16 -0600128 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 */
137enum ccp_aes_action {
138 CCP_AES_ACTION_DECRYPT = 0,
139 CCP_AES_ACTION_ENCRYPT,
140 CCP_AES_ACTION__LAST,
141};
Gary R Hook36cf5152017-03-15 13:21:01 -0500142/* Overloaded field */
143#define CCP_AES_GHASHAAD CCP_AES_ACTION_DECRYPT
144#define CCP_AES_GHASHFINAL CCP_AES_ACTION_ENCRYPT
Tom Lendacky63b94502013-11-12 11:46:16 -0600145
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 */
171struct ccp_aes_engine {
172 enum ccp_aes_type type;
173 enum ccp_aes_mode mode;
174 enum ccp_aes_action action;
175
Gary R Hook30692ed2019-07-30 16:05:24 +0000176 u32 authsize;
177
Tom Lendacky63b94502013-11-12 11:46:16 -0600178 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;
Tom Lendacky81a59f02014-01-06 13:34:17 -0600185 u64 src_len; /* In bytes */
Tom Lendacky63b94502013-11-12 11:46:16 -0600186
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 */
Gary R Hook36cf5152017-03-15 13:21:01 -0500191
192 u32 aad_len; /* In bytes */
Tom Lendacky63b94502013-11-12 11:46:16 -0600193};
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 */
205enum 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 */
233struct ccp_xts_aes_engine {
Gary R Hooke6523992017-07-25 14:12:11 -0500234 enum ccp_aes_type type;
Tom Lendacky63b94502013-11-12 11:46:16 -0600235 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;
Tom Lendacky81a59f02014-01-06 13:34:17 -0600245 u64 src_len; /* In bytes */
Tom Lendacky63b94502013-11-12 11:46:16 -0600246
247 u32 final;
248};
249
250/***** SHA engine *****/
Tom Lendacky63b94502013-11-12 11:46:16 -0600251/**
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 */
258enum ccp_sha_type {
259 CCP_SHA_TYPE_1 = 1,
260 CCP_SHA_TYPE_224,
261 CCP_SHA_TYPE_256,
Gary R Hookccebcf32017-03-15 13:20:43 -0500262 CCP_SHA_TYPE_384,
263 CCP_SHA_TYPE_512,
Tom Lendacky63b94502013-11-12 11:46:16 -0600264 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
Tom Lendackyc11baa02014-01-24 16:18:02 -0600274 * @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
Tom Lendacky63b94502013-11-12 11:46:16 -0600277 * @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 */
287struct 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;
Tom Lendacky81a59f02014-01-06 13:34:17 -0600294 u64 src_len; /* In bytes */
Tom Lendacky63b94502013-11-12 11:46:16 -0600295
Tom Lendackyc11baa02014-01-24 16:18:02 -0600296 struct scatterlist *opad;
297 u32 opad_len; /* In bytes */
298
299 u32 first; /* Indicates first sha cmd */
Tom Lendacky63b94502013-11-12 11:46:16 -0600300 u32 final; /* Indicates final sha cmd */
301 u64 msg_bits; /* Message length in bits required for
302 * final sha cmd */
303};
304
Gary R Hook990672d2017-03-15 13:20:52 -0500305/***** 3DES engine *****/
306enum 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
313enum ccp_des3_type {
314 CCP_DES3_TYPE_168 = 1,
315 CCP_DES3_TYPE__LAST,
316 };
317
318enum 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 */
344struct 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
Tom Lendacky63b94502013-11-12 11:46:16 -0600359/***** 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 */
374struct 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 */
397enum 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 */
413enum 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 */
435struct 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;
Tom Lendacky81a59f02014-01-06 13:34:17 -0600443 u64 src_len; /* In bytes */
Tom Lendacky63b94502013-11-12 11:46:16 -0600444
445 u32 final;
446};
447
Gary R Hook58ea8ab2016-04-18 09:21:44 -0500448/**
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 */
464struct 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
Tom Lendacky63b94502013-11-12 11:46:16 -0600477/***** 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 */
492enum 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 */
512struct 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 */
530struct 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 */
551struct 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 */
578struct 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 */
605enum ccp_engine {
606 CCP_ENGINE_AES = 0,
607 CCP_ENGINE_XTS_AES_128,
Gary R Hook990672d2017-03-15 13:20:52 -0500608 CCP_ENGINE_DES3,
Tom Lendacky63b94502013-11-12 11:46:16 -0600609 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 */
Gary R Hook58ea8ab2016-04-18 09:21:44 -0500618#define CCP_CMD_MAY_BACKLOG 0x00000001
619#define CCP_CMD_PASSTHRU_NO_DMA_MAP 0x00000002
Tom Lendacky63b94502013-11-12 11:46:16 -0600620
621/**
Paul Bollec8d283ff2016-10-20 21:20:59 +0200622 * struct ccp_cmd - CCP operation request
Tom Lendacky63b94502013-11-12 11:46:16 -0600623 * @entry: list element (ccp driver use only)
624 * @work: work element used for callbacks (ccp driver use only)
Gary R Hook7c468442017-03-10 12:28:18 -0600625 * @ccp: CCP device to be run on
Tom Lendacky63b94502013-11-12 11:46:16 -0600626 * @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 */
639struct 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;
Gary R Hook990672d2017-03-15 13:20:52 -0500656 struct ccp_des3_engine des3;
Tom Lendacky63b94502013-11-12 11:46:16 -0600657 struct ccp_sha_engine sha;
658 struct ccp_rsa_engine rsa;
659 struct ccp_passthru_engine passthru;
Gary R Hook58ea8ab2016-04-18 09:21:44 -0500660 struct ccp_passthru_nomap_engine passthru_nomap;
Tom Lendacky63b94502013-11-12 11:46:16 -0600661 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