xref: /openbmc/linux/drivers/crypto/ccree/cc_hash.h (revision 2a598d0b)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (C) 2012-2019 ARM Limited (or its affiliates). */
3 
4 /* \file cc_hash.h
5  * ARM CryptoCell Hash Crypto API
6  */
7 
8 #ifndef __CC_HASH_H__
9 #define __CC_HASH_H__
10 
11 #include "cc_buffer_mgr.h"
12 
13 #define HMAC_IPAD_CONST	0x36363636
14 #define HMAC_OPAD_CONST	0x5C5C5C5C
15 #define HASH_LEN_SIZE_712 16
16 #define HASH_LEN_SIZE_630 8
17 #define HASH_MAX_LEN_SIZE HASH_LEN_SIZE_712
18 #define CC_MAX_HASH_DIGEST_SIZE	SHA512_DIGEST_SIZE
19 #define CC_MAX_HASH_BLCK_SIZE SHA512_BLOCK_SIZE
20 
21 #define XCBC_MAC_K1_OFFSET 0
22 #define XCBC_MAC_K2_OFFSET 16
23 #define XCBC_MAC_K3_OFFSET 32
24 
25 #define CC_EXPORT_MAGIC 0xC2EE1070U
26 
27 /* this struct was taken from drivers/crypto/nx/nx-aes-xcbc.c and it is used
28  * for xcbc/cmac statesize
29  */
30 struct aeshash_state {
31 	u8 state[AES_BLOCK_SIZE];
32 	unsigned int count;
33 	u8 buffer[AES_BLOCK_SIZE];
34 };
35 
36 /* ahash state */
37 struct ahash_req_ctx {
38 	u8 buffers[2][CC_MAX_HASH_BLCK_SIZE] ____cacheline_aligned;
39 	u8 digest_result_buff[CC_MAX_HASH_DIGEST_SIZE] ____cacheline_aligned;
40 	u8 digest_buff[CC_MAX_HASH_DIGEST_SIZE] ____cacheline_aligned;
41 	u8 opad_digest_buff[CC_MAX_HASH_DIGEST_SIZE] ____cacheline_aligned;
42 	u8 digest_bytes_len[HASH_MAX_LEN_SIZE] ____cacheline_aligned;
43 	struct async_gen_req_ctx gen_ctx ____cacheline_aligned;
44 	enum cc_req_dma_buf_type data_dma_buf_type;
45 	dma_addr_t opad_digest_dma_addr;
46 	dma_addr_t digest_buff_dma_addr;
47 	dma_addr_t digest_bytes_len_dma_addr;
48 	dma_addr_t digest_result_dma_addr;
49 	u32 buf_cnt[2];
50 	u32 buff_index;
51 	u32 xcbc_count; /* count xcbc update operatations */
52 	struct scatterlist buff_sg[2];
53 	struct scatterlist *curr_sg;
54 	u32 in_nents;
55 	u32 mlli_nents;
56 	struct mlli_params mlli_params;
57 };
58 
59 static inline u32 *cc_hash_buf_cnt(struct ahash_req_ctx *state)
60 {
61 	return &state->buf_cnt[state->buff_index];
62 }
63 
64 static inline u8 *cc_hash_buf(struct ahash_req_ctx *state)
65 {
66 	return state->buffers[state->buff_index];
67 }
68 
69 static inline u32 *cc_next_buf_cnt(struct ahash_req_ctx *state)
70 {
71 	return &state->buf_cnt[state->buff_index ^ 1];
72 }
73 
74 static inline u8 *cc_next_buf(struct ahash_req_ctx *state)
75 {
76 	return state->buffers[state->buff_index ^ 1];
77 }
78 
79 int cc_hash_alloc(struct cc_drvdata *drvdata);
80 int cc_init_hash_sram(struct cc_drvdata *drvdata);
81 int cc_hash_free(struct cc_drvdata *drvdata);
82 
83 /**
84  * cc_digest_len_addr() - Gets the initial digest length
85  *
86  * @drvdata: Associated device driver context
87  * @mode: The Hash mode. Supported modes: MD5/SHA1/SHA224/SHA256/SHA384/SHA512
88  *
89  * Return:
90  * Returns the address of the initial digest length in SRAM
91  */
92 u32 cc_digest_len_addr(void *drvdata, u32 mode);
93 
94 /**
95  * cc_larval_digest_addr() - Gets the address of the initial digest in SRAM
96  * according to the given hash mode
97  *
98  * @drvdata: Associated device driver context
99  * @mode: The Hash mode. Supported modes: MD5/SHA1/SHA224/SHA256/SHA384/SHA512
100  *
101  * Return:
102  * The address of the initial digest in SRAM
103  */
104 u32 cc_larval_digest_addr(void *drvdata, u32 mode);
105 
106 #endif /*__CC_HASH_H__*/
107