xref: /linux/include/linux/ccp.h (revision a24d22b2)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * AMD Cryptographic Coprocessor (CCP) driver
4  *
5  * Copyright (C) 2013,2017 Advanced Micro Devices, Inc.
6  *
7  * Author: Tom Lendacky <thomas.lendacky@amd.com>
8  * Author: Gary R Hook <gary.hook@amd.com>
9  */
10 
11 #ifndef __CCP_H__
12 #define __CCP_H__
13 
14 #include <linux/scatterlist.h>
15 #include <linux/workqueue.h>
16 #include <linux/list.h>
17 #include <crypto/aes.h>
18 #include <crypto/sha1.h>
19 #include <crypto/sha2.h>
20 
21 struct ccp_device;
22 struct ccp_cmd;
23 
24 #if defined(CONFIG_CRYPTO_DEV_SP_CCP)
25 
26 /**
27  * ccp_present - check if a CCP device is present
28  *
29  * Returns zero if a CCP device is present, -ENODEV otherwise.
30  */
31 int ccp_present(void);
32 
33 #define	CCP_VSIZE 16
34 #define	CCP_VMASK		((unsigned int)((1 << CCP_VSIZE) - 1))
35 #define	CCP_VERSION(v, r)	((unsigned int)((v << CCP_VSIZE) \
36 					       | (r & CCP_VMASK)))
37 
38 /**
39  * ccp_version - get the version of the CCP
40  *
41  * Returns a positive version number, or zero if no CCP
42  */
43 unsigned int ccp_version(void);
44 
45 /**
46  * ccp_enqueue_cmd - queue an operation for processing by the CCP
47  *
48  * @cmd: ccp_cmd struct to be processed
49  *
50  * Refer to the ccp_cmd struct below for required fields.
51  *
52  * Queue a cmd to be processed by the CCP. If queueing the cmd
53  * would exceed the defined length of the cmd queue the cmd will
54  * only be queued if the CCP_CMD_MAY_BACKLOG flag is set and will
55  * result in a return code of -EBUSY.
56  *
57  * The callback routine specified in the ccp_cmd struct will be
58  * called to notify the caller of completion (if the cmd was not
59  * backlogged) or advancement out of the backlog. If the cmd has
60  * advanced out of the backlog the "err" value of the callback
61  * will be -EINPROGRESS. Any other "err" value during callback is
62  * the result of the operation.
63  *
64  * The cmd has been successfully queued if:
65  *   the return code is -EINPROGRESS or
66  *   the return code is -EBUSY and CCP_CMD_MAY_BACKLOG flag is set
67  */
68 int ccp_enqueue_cmd(struct ccp_cmd *cmd);
69 
70 #else /* CONFIG_CRYPTO_DEV_CCP_SP_DEV is not enabled */
71 
ccp_present(void)72 static inline int ccp_present(void)
73 {
74 	return -ENODEV;
75 }
76 
ccp_version(void)77 static inline unsigned int ccp_version(void)
78 {
79 	return 0;
80 }
81 
ccp_enqueue_cmd(struct ccp_cmd * cmd)82 static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd)
83 {
84 	return -ENODEV;
85 }
86 
87 #endif /* CONFIG_CRYPTO_DEV_SP_CCP */
88 
89 
90 /***** AES engine *****/
91 /**
92  * ccp_aes_type - AES key size
93  *
94  * @CCP_AES_TYPE_128: 128-bit key
95  * @CCP_AES_TYPE_192: 192-bit key
96  * @CCP_AES_TYPE_256: 256-bit key
97  */
98 enum ccp_aes_type {
99 	CCP_AES_TYPE_128 = 0,
100 	CCP_AES_TYPE_192,
101 	CCP_AES_TYPE_256,
102 	CCP_AES_TYPE__LAST,
103 };
104 
105 /**
106  * ccp_aes_mode - AES operation mode
107  *
108  * @CCP_AES_MODE_ECB: ECB mode
109  * @CCP_AES_MODE_CBC: CBC mode
110  * @CCP_AES_MODE_OFB: OFB mode
111  * @CCP_AES_MODE_CFB: CFB mode
112  * @CCP_AES_MODE_CTR: CTR mode
113  * @CCP_AES_MODE_CMAC: CMAC mode
114  */
115 enum ccp_aes_mode {
116 	CCP_AES_MODE_ECB = 0,
117 	CCP_AES_MODE_CBC,
118 	CCP_AES_MODE_OFB,
119 	CCP_AES_MODE_CFB,
120 	CCP_AES_MODE_CTR,
121 	CCP_AES_MODE_CMAC,
122 	CCP_AES_MODE_GHASH,
123 	CCP_AES_MODE_GCTR,
124 	CCP_AES_MODE_GCM,
125 	CCP_AES_MODE_GMAC,
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 /* Overloaded field */
141 #define	CCP_AES_GHASHAAD	CCP_AES_ACTION_DECRYPT
142 #define	CCP_AES_GHASHFINAL	CCP_AES_ACTION_ENCRYPT
143 
144 /**
145  * struct ccp_aes_engine - CCP AES operation
146  * @type: AES operation key size
147  * @mode: AES operation mode
148  * @action: AES operation (decrypt/encrypt)
149  * @key: key to be used for this AES operation
150  * @key_len: length in bytes of key
151  * @iv: IV to be used for this AES operation
152  * @iv_len: length in bytes of iv
153  * @src: data to be used for this operation
154  * @dst: data produced by this operation
155  * @src_len: length in bytes of data used for this operation
156  * @cmac_final: indicates final operation when running in CMAC mode
157  * @cmac_key: K1/K2 key used in final CMAC operation
158  * @cmac_key_len: length in bytes of cmac_key
159  *
160  * Variables required to be set when calling ccp_enqueue_cmd():
161  *   - type, mode, action, key, key_len, src, dst, src_len
162  *   - iv, iv_len for any mode other than ECB
163  *   - cmac_final for CMAC mode
164  *   - cmac_key, cmac_key_len for CMAC mode if cmac_final is non-zero
165  *
166  * The iv variable is used as both input and output. On completion of the
167  * AES operation the new IV overwrites the old IV.
168  */
169 struct ccp_aes_engine {
170 	enum ccp_aes_type type;
171 	enum ccp_aes_mode mode;
172 	enum ccp_aes_action action;
173 
174 	u32 authsize;
175 
176 	struct scatterlist *key;
177 	u32 key_len;		/* In bytes */
178 
179 	struct scatterlist *iv;
180 	u32 iv_len;		/* In bytes */
181 
182 	struct scatterlist *src, *dst;
183 	u64 src_len;		/* In bytes */
184 
185 	u32 cmac_final;		/* Indicates final cmac cmd */
186 	struct scatterlist *cmac_key;	/* K1/K2 cmac key required for
187 					 * final cmac cmd */
188 	u32 cmac_key_len;	/* In bytes */
189 
190 	u32 aad_len;		/* In bytes */
191 };
192 
193 /***** XTS-AES engine *****/
194 /**
195  * ccp_xts_aes_unit_size - XTS unit size
196  *
197  * @CCP_XTS_AES_UNIT_SIZE_16: Unit size of 16 bytes
198  * @CCP_XTS_AES_UNIT_SIZE_512: Unit size of 512 bytes
199  * @CCP_XTS_AES_UNIT_SIZE_1024: Unit size of 1024 bytes
200  * @CCP_XTS_AES_UNIT_SIZE_2048: Unit size of 2048 bytes
201  * @CCP_XTS_AES_UNIT_SIZE_4096: Unit size of 4096 bytes
202  */
203 enum ccp_xts_aes_unit_size {
204 	CCP_XTS_AES_UNIT_SIZE_16 = 0,
205 	CCP_XTS_AES_UNIT_SIZE_512,
206 	CCP_XTS_AES_UNIT_SIZE_1024,
207 	CCP_XTS_AES_UNIT_SIZE_2048,
208 	CCP_XTS_AES_UNIT_SIZE_4096,
209 	CCP_XTS_AES_UNIT_SIZE__LAST,
210 };
211 
212 /**
213  * struct ccp_xts_aes_engine - CCP XTS AES operation
214  * @action: AES operation (decrypt/encrypt)
215  * @unit_size: unit size of the XTS operation
216  * @key: key to be used for this XTS AES operation
217  * @key_len: length in bytes of key
218  * @iv: IV to be used for this XTS AES operation
219  * @iv_len: length in bytes of iv
220  * @src: data to be used for this operation
221  * @dst: data produced by this operation
222  * @src_len: length in bytes of data used for this operation
223  * @final: indicates final XTS operation
224  *
225  * Variables required to be set when calling ccp_enqueue_cmd():
226  *   - action, unit_size, key, key_len, iv, iv_len, src, dst, src_len, final
227  *
228  * The iv variable is used as both input and output. On completion of the
229  * AES operation the new IV overwrites the old IV.
230  */
231 struct ccp_xts_aes_engine {
232 	enum ccp_aes_type type;
233 	enum ccp_aes_action action;
234 	enum ccp_xts_aes_unit_size unit_size;
235 
236 	struct scatterlist *key;
237 	u32 key_len;		/* In bytes */
238 
239 	struct scatterlist *iv;
240 	u32 iv_len;		/* In bytes */
241 
242 	struct scatterlist *src, *dst;
243 	u64 src_len;		/* In bytes */
244 
245 	u32 final;
246 };
247 
248 /***** SHA engine *****/
249 /**
250  * ccp_sha_type - type of SHA operation
251  *
252  * @CCP_SHA_TYPE_1: SHA-1 operation
253  * @CCP_SHA_TYPE_224: SHA-224 operation
254  * @CCP_SHA_TYPE_256: SHA-256 operation
255  */
256 enum ccp_sha_type {
257 	CCP_SHA_TYPE_1 = 1,
258 	CCP_SHA_TYPE_224,
259 	CCP_SHA_TYPE_256,
260 	CCP_SHA_TYPE_384,
261 	CCP_SHA_TYPE_512,
262 	CCP_SHA_TYPE__LAST,
263 };
264 
265 /**
266  * struct ccp_sha_engine - CCP SHA operation
267  * @type: Type of SHA operation
268  * @ctx: current hash value
269  * @ctx_len: length in bytes of hash value
270  * @src: data to be used for this operation
271  * @src_len: length in bytes of data used for this operation
272  * @opad: data to be used for final HMAC operation
273  * @opad_len: length in bytes of data used for final HMAC operation
274  * @first: indicates first SHA operation
275  * @final: indicates final SHA operation
276  * @msg_bits: total length of the message in bits used in final SHA operation
277  *
278  * Variables required to be set when calling ccp_enqueue_cmd():
279  *   - type, ctx, ctx_len, src, src_len, final
280  *   - msg_bits if final is non-zero
281  *
282  * The ctx variable is used as both input and output. On completion of the
283  * SHA operation the new hash value overwrites the old hash value.
284  */
285 struct ccp_sha_engine {
286 	enum ccp_sha_type type;
287 
288 	struct scatterlist *ctx;
289 	u32 ctx_len;		/* In bytes */
290 
291 	struct scatterlist *src;
292 	u64 src_len;		/* In bytes */
293 
294 	struct scatterlist *opad;
295 	u32 opad_len;		/* In bytes */
296 
297 	u32 first;		/* Indicates first sha cmd */
298 	u32 final;		/* Indicates final sha cmd */
299 	u64 msg_bits;		/* Message length in bits required for
300 				 * final sha cmd */
301 };
302 
303 /***** 3DES engine *****/
304 enum ccp_des3_mode {
305 	CCP_DES3_MODE_ECB = 0,
306 	CCP_DES3_MODE_CBC,
307 	CCP_DES3_MODE_CFB,
308 	CCP_DES3_MODE__LAST,
309 };
310 
311 enum ccp_des3_type {
312 	CCP_DES3_TYPE_168 = 1,
313 	CCP_DES3_TYPE__LAST,
314 	};
315 
316 enum ccp_des3_action {
317 	CCP_DES3_ACTION_DECRYPT = 0,
318 	CCP_DES3_ACTION_ENCRYPT,
319 	CCP_DES3_ACTION__LAST,
320 };
321 
322 /**
323  * struct ccp_des3_engine - CCP SHA operation
324  * @type: Type of 3DES operation
325  * @mode: cipher mode
326  * @action: 3DES operation (decrypt/encrypt)
327  * @key: key to be used for this 3DES operation
328  * @key_len: length of key (in bytes)
329  * @iv: IV to be used for this AES operation
330  * @iv_len: length in bytes of iv
331  * @src: input data to be used for this operation
332  * @src_len: length of input data used for this operation (in bytes)
333  * @dst: output data produced by this operation
334  *
335  * Variables required to be set when calling ccp_enqueue_cmd():
336  *   - type, mode, action, key, key_len, src, dst, src_len
337  *   - iv, iv_len for any mode other than ECB
338  *
339  * The iv variable is used as both input and output. On completion of the
340  * 3DES operation the new IV overwrites the old IV.
341  */
342 struct ccp_des3_engine {
343 	enum ccp_des3_type type;
344 	enum ccp_des3_mode mode;
345 	enum ccp_des3_action action;
346 
347 	struct scatterlist *key;
348 	u32 key_len;	    /* In bytes */
349 
350 	struct scatterlist *iv;
351 	u32 iv_len;	     /* In bytes */
352 
353 	struct scatterlist *src, *dst;
354 	u64 src_len;	    /* In bytes */
355 };
356 
357 /***** RSA engine *****/
358 /**
359  * struct ccp_rsa_engine - CCP RSA operation
360  * @key_size: length in bits of RSA key
361  * @exp: RSA exponent
362  * @exp_len: length in bytes of exponent
363  * @mod: RSA modulus
364  * @mod_len: length in bytes of modulus
365  * @src: data to be used for this operation
366  * @dst: data produced by this operation
367  * @src_len: length in bytes of data used for this operation
368  *
369  * Variables required to be set when calling ccp_enqueue_cmd():
370  *   - key_size, exp, exp_len, mod, mod_len, src, dst, src_len
371  */
372 struct ccp_rsa_engine {
373 	u32 key_size;		/* In bits */
374 
375 	struct scatterlist *exp;
376 	u32 exp_len;		/* In bytes */
377 
378 	struct scatterlist *mod;
379 	u32 mod_len;		/* In bytes */
380 
381 	struct scatterlist *src, *dst;
382 	u32 src_len;		/* In bytes */
383 };
384 
385 /***** Passthru engine *****/
386 /**
387  * ccp_passthru_bitwise - type of bitwise passthru operation
388  *
389  * @CCP_PASSTHRU_BITWISE_NOOP: no bitwise operation performed
390  * @CCP_PASSTHRU_BITWISE_AND: perform bitwise AND of src with mask
391  * @CCP_PASSTHRU_BITWISE_OR: perform bitwise OR of src with mask
392  * @CCP_PASSTHRU_BITWISE_XOR: perform bitwise XOR of src with mask
393  * @CCP_PASSTHRU_BITWISE_MASK: overwrite with mask
394  */
395 enum ccp_passthru_bitwise {
396 	CCP_PASSTHRU_BITWISE_NOOP = 0,
397 	CCP_PASSTHRU_BITWISE_AND,
398 	CCP_PASSTHRU_BITWISE_OR,
399 	CCP_PASSTHRU_BITWISE_XOR,
400 	CCP_PASSTHRU_BITWISE_MASK,
401 	CCP_PASSTHRU_BITWISE__LAST,
402 };
403 
404 /**
405  * ccp_passthru_byteswap - type of byteswap passthru operation
406  *
407  * @CCP_PASSTHRU_BYTESWAP_NOOP: no byte swapping performed
408  * @CCP_PASSTHRU_BYTESWAP_32BIT: swap bytes within 32-bit words
409  * @CCP_PASSTHRU_BYTESWAP_256BIT: swap bytes within 256-bit words
410  */
411 enum ccp_passthru_byteswap {
412 	CCP_PASSTHRU_BYTESWAP_NOOP = 0,
413 	CCP_PASSTHRU_BYTESWAP_32BIT,
414 	CCP_PASSTHRU_BYTESWAP_256BIT,
415 	CCP_PASSTHRU_BYTESWAP__LAST,
416 };
417 
418 /**
419  * struct ccp_passthru_engine - CCP pass-through operation
420  * @bit_mod: bitwise operation to perform
421  * @byte_swap: byteswap operation to perform
422  * @mask: mask to be applied to data
423  * @mask_len: length in bytes of mask
424  * @src: data to be used for this operation
425  * @dst: data produced by this operation
426  * @src_len: length in bytes of data used for this operation
427  * @final: indicate final pass-through operation
428  *
429  * Variables required to be set when calling ccp_enqueue_cmd():
430  *   - bit_mod, byte_swap, src, dst, src_len
431  *   - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP
432  */
433 struct ccp_passthru_engine {
434 	enum ccp_passthru_bitwise bit_mod;
435 	enum ccp_passthru_byteswap byte_swap;
436 
437 	struct scatterlist *mask;
438 	u32 mask_len;		/* In bytes */
439 
440 	struct scatterlist *src, *dst;
441 	u64 src_len;		/* In bytes */
442 
443 	u32 final;
444 };
445 
446 /**
447  * struct ccp_passthru_nomap_engine - CCP pass-through operation
448  *   without performing DMA mapping
449  * @bit_mod: bitwise operation to perform
450  * @byte_swap: byteswap operation to perform
451  * @mask: mask to be applied to data
452  * @mask_len: length in bytes of mask
453  * @src: data to be used for this operation
454  * @dst: data produced by this operation
455  * @src_len: length in bytes of data used for this operation
456  * @final: indicate final pass-through operation
457  *
458  * Variables required to be set when calling ccp_enqueue_cmd():
459  *   - bit_mod, byte_swap, src, dst, src_len
460  *   - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP
461  */
462 struct ccp_passthru_nomap_engine {
463 	enum ccp_passthru_bitwise bit_mod;
464 	enum ccp_passthru_byteswap byte_swap;
465 
466 	dma_addr_t mask;
467 	u32 mask_len;		/* In bytes */
468 
469 	dma_addr_t src_dma, dst_dma;
470 	u64 src_len;		/* In bytes */
471 
472 	u32 final;
473 };
474 
475 /***** ECC engine *****/
476 #define CCP_ECC_MODULUS_BYTES	48	/* 384-bits */
477 #define CCP_ECC_MAX_OPERANDS	6
478 #define CCP_ECC_MAX_OUTPUTS	3
479 
480 /**
481  * ccp_ecc_function - type of ECC function
482  *
483  * @CCP_ECC_FUNCTION_MMUL_384BIT: 384-bit modular multiplication
484  * @CCP_ECC_FUNCTION_MADD_384BIT: 384-bit modular addition
485  * @CCP_ECC_FUNCTION_MINV_384BIT: 384-bit multiplicative inverse
486  * @CCP_ECC_FUNCTION_PADD_384BIT: 384-bit point addition
487  * @CCP_ECC_FUNCTION_PMUL_384BIT: 384-bit point multiplication
488  * @CCP_ECC_FUNCTION_PDBL_384BIT: 384-bit point doubling
489  */
490 enum ccp_ecc_function {
491 	CCP_ECC_FUNCTION_MMUL_384BIT = 0,
492 	CCP_ECC_FUNCTION_MADD_384BIT,
493 	CCP_ECC_FUNCTION_MINV_384BIT,
494 	CCP_ECC_FUNCTION_PADD_384BIT,
495 	CCP_ECC_FUNCTION_PMUL_384BIT,
496 	CCP_ECC_FUNCTION_PDBL_384BIT,
497 };
498 
499 /**
500  * struct ccp_ecc_modular_math - CCP ECC modular math parameters
501  * @operand_1: first operand for the modular math operation
502  * @operand_1_len: length of the first operand
503  * @operand_2: second operand for the modular math operation
504  *	       (not used for CCP_ECC_FUNCTION_MINV_384BIT)
505  * @operand_2_len: length of the second operand
506  *	       (not used for CCP_ECC_FUNCTION_MINV_384BIT)
507  * @result: result of the modular math operation
508  * @result_len: length of the supplied result buffer
509  */
510 struct ccp_ecc_modular_math {
511 	struct scatterlist *operand_1;
512 	unsigned int operand_1_len;	/* In bytes */
513 
514 	struct scatterlist *operand_2;
515 	unsigned int operand_2_len;	/* In bytes */
516 
517 	struct scatterlist *result;
518 	unsigned int result_len;	/* In bytes */
519 };
520 
521 /**
522  * struct ccp_ecc_point - CCP ECC point definition
523  * @x: the x coordinate of the ECC point
524  * @x_len: the length of the x coordinate
525  * @y: the y coordinate of the ECC point
526  * @y_len: the length of the y coordinate
527  */
528 struct ccp_ecc_point {
529 	struct scatterlist *x;
530 	unsigned int x_len;	/* In bytes */
531 
532 	struct scatterlist *y;
533 	unsigned int y_len;	/* In bytes */
534 };
535 
536 /**
537  * struct ccp_ecc_point_math - CCP ECC point math parameters
538  * @point_1: the first point of the ECC point math operation
539  * @point_2: the second point of the ECC point math operation
540  *	     (only used for CCP_ECC_FUNCTION_PADD_384BIT)
541  * @domain_a: the a parameter of the ECC curve
542  * @domain_a_len: the length of the a parameter
543  * @scalar: the scalar parameter for the point match operation
544  *	    (only used for CCP_ECC_FUNCTION_PMUL_384BIT)
545  * @scalar_len: the length of the scalar parameter
546  *		(only used for CCP_ECC_FUNCTION_PMUL_384BIT)
547  * @result: the point resulting from the point math operation
548  */
549 struct ccp_ecc_point_math {
550 	struct ccp_ecc_point point_1;
551 	struct ccp_ecc_point point_2;
552 
553 	struct scatterlist *domain_a;
554 	unsigned int domain_a_len;	/* In bytes */
555 
556 	struct scatterlist *scalar;
557 	unsigned int scalar_len;	/* In bytes */
558 
559 	struct ccp_ecc_point result;
560 };
561 
562 /**
563  * struct ccp_ecc_engine - CCP ECC operation
564  * @function: ECC function to perform
565  * @mod: ECC modulus
566  * @mod_len: length in bytes of modulus
567  * @mm: module math parameters
568  * @pm: point math parameters
569  * @ecc_result: result of the ECC operation
570  *
571  * Variables required to be set when calling ccp_enqueue_cmd():
572  *   - function, mod, mod_len
573  *   - operand, operand_len, operand_count, output, output_len, output_count
574  *   - ecc_result
575  */
576 struct ccp_ecc_engine {
577 	enum ccp_ecc_function function;
578 
579 	struct scatterlist *mod;
580 	u32 mod_len;		/* In bytes */
581 
582 	union {
583 		struct ccp_ecc_modular_math mm;
584 		struct ccp_ecc_point_math pm;
585 	} u;
586 
587 	u16 ecc_result;
588 };
589 
590 
591 /**
592  * ccp_engine - CCP operation identifiers
593  *
594  * @CCP_ENGINE_AES: AES operation
595  * @CCP_ENGINE_XTS_AES: 128-bit XTS AES operation
596  * @CCP_ENGINE_RSVD1: unused
597  * @CCP_ENGINE_SHA: SHA operation
598  * @CCP_ENGINE_RSA: RSA operation
599  * @CCP_ENGINE_PASSTHRU: pass-through operation
600  * @CCP_ENGINE_ZLIB_DECOMPRESS: unused
601  * @CCP_ENGINE_ECC: ECC operation
602  */
603 enum ccp_engine {
604 	CCP_ENGINE_AES = 0,
605 	CCP_ENGINE_XTS_AES_128,
606 	CCP_ENGINE_DES3,
607 	CCP_ENGINE_SHA,
608 	CCP_ENGINE_RSA,
609 	CCP_ENGINE_PASSTHRU,
610 	CCP_ENGINE_ZLIB_DECOMPRESS,
611 	CCP_ENGINE_ECC,
612 	CCP_ENGINE__LAST,
613 };
614 
615 /* Flag values for flags member of ccp_cmd */
616 #define CCP_CMD_MAY_BACKLOG		0x00000001
617 #define CCP_CMD_PASSTHRU_NO_DMA_MAP	0x00000002
618 
619 /**
620  * struct ccp_cmd - CCP operation request
621  * @entry: list element (ccp driver use only)
622  * @work: work element used for callbacks (ccp driver use only)
623  * @ccp: CCP device to be run on
624  * @ret: operation return code (ccp driver use only)
625  * @flags: cmd processing flags
626  * @engine: CCP operation to perform
627  * @engine_error: CCP engine return code
628  * @u: engine specific structures, refer to specific engine struct below
629  * @callback: operation completion callback function
630  * @data: parameter value to be supplied to the callback function
631  *
632  * Variables required to be set when calling ccp_enqueue_cmd():
633  *   - engine, callback
634  *   - See the operation structures below for what is required for each
635  *     operation.
636  */
637 struct ccp_cmd {
638 	/* The list_head, work_struct, ccp and ret variables are for use
639 	 * by the CCP driver only.
640 	 */
641 	struct list_head entry;
642 	struct work_struct work;
643 	struct ccp_device *ccp;
644 	int ret;
645 
646 	u32 flags;
647 
648 	enum ccp_engine engine;
649 	u32 engine_error;
650 
651 	union {
652 		struct ccp_aes_engine aes;
653 		struct ccp_xts_aes_engine xts;
654 		struct ccp_des3_engine des3;
655 		struct ccp_sha_engine sha;
656 		struct ccp_rsa_engine rsa;
657 		struct ccp_passthru_engine passthru;
658 		struct ccp_passthru_nomap_engine passthru_nomap;
659 		struct ccp_ecc_engine ecc;
660 	} u;
661 
662 	/* Completion callback support */
663 	void (*callback)(void *data, int err);
664 	void *data;
665 };
666 
667 #endif
668