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1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* Copyright (C) 2012-2018 ARM Limited or its affiliates. */ | |
3 | ||
4 | /* \file cc_aead.h | |
5 | * ARM CryptoCell AEAD Crypto API | |
6 | */ | |
7 | ||
8 | #ifndef __CC_AEAD_H__ | |
9 | #define __CC_AEAD_H__ | |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <crypto/algapi.h> | |
13 | #include <crypto/ctr.h> | |
14 | ||
15 | /* mac_cmp - HW writes 8 B but all bytes hold the same value */ | |
16 | #define ICV_CMP_SIZE 8 | |
17 | #define CCM_CONFIG_BUF_SIZE (AES_BLOCK_SIZE * 3) | |
18 | #define MAX_MAC_SIZE SHA256_DIGEST_SIZE | |
19 | ||
20 | /* defines for AES GCM configuration buffer */ | |
21 | #define GCM_BLOCK_LEN_SIZE 8 | |
22 | ||
23 | #define GCM_BLOCK_RFC4_IV_OFFSET 4 | |
24 | #define GCM_BLOCK_RFC4_IV_SIZE 8 /* IV size for rfc's */ | |
25 | #define GCM_BLOCK_RFC4_NONCE_OFFSET 0 | |
26 | #define GCM_BLOCK_RFC4_NONCE_SIZE 4 | |
27 | ||
28 | /* Offsets into AES CCM configuration buffer */ | |
29 | #define CCM_B0_OFFSET 0 | |
30 | #define CCM_A0_OFFSET 16 | |
31 | #define CCM_CTR_COUNT_0_OFFSET 32 | |
32 | /* CCM B0 and CTR_COUNT constants. */ | |
33 | #define CCM_BLOCK_NONCE_OFFSET 1 /* Nonce offset inside B0 and CTR_COUNT */ | |
34 | #define CCM_BLOCK_NONCE_SIZE 3 /* Nonce size inside B0 and CTR_COUNT */ | |
35 | #define CCM_BLOCK_IV_OFFSET 4 /* IV offset inside B0 and CTR_COUNT */ | |
36 | #define CCM_BLOCK_IV_SIZE 8 /* IV size inside B0 and CTR_COUNT */ | |
37 | ||
38 | enum aead_ccm_header_size { | |
39 | ccm_header_size_null = -1, | |
40 | ccm_header_size_zero = 0, | |
41 | ccm_header_size_2 = 2, | |
42 | ccm_header_size_6 = 6, | |
43 | ccm_header_size_max = S32_MAX | |
44 | }; | |
45 | ||
46 | struct aead_req_ctx { | |
47 | /* Allocate cache line although only 4 bytes are needed to | |
48 | * assure next field falls @ cache line | |
49 | * Used for both: digest HW compare and CCM/GCM MAC value | |
50 | */ | |
51 | u8 mac_buf[MAX_MAC_SIZE] ____cacheline_aligned; | |
52 | u8 ctr_iv[AES_BLOCK_SIZE] ____cacheline_aligned; | |
53 | ||
54 | //used in gcm | |
55 | u8 gcm_iv_inc1[AES_BLOCK_SIZE] ____cacheline_aligned; | |
56 | u8 gcm_iv_inc2[AES_BLOCK_SIZE] ____cacheline_aligned; | |
57 | u8 hkey[AES_BLOCK_SIZE] ____cacheline_aligned; | |
58 | struct { | |
59 | u8 len_a[GCM_BLOCK_LEN_SIZE] ____cacheline_aligned; | |
60 | u8 len_c[GCM_BLOCK_LEN_SIZE]; | |
61 | } gcm_len_block; | |
62 | ||
63 | u8 ccm_config[CCM_CONFIG_BUF_SIZE] ____cacheline_aligned; | |
64 | /* HW actual size input */ | |
65 | unsigned int hw_iv_size ____cacheline_aligned; | |
66 | /* used to prevent cache coherence problem */ | |
67 | u8 backup_mac[MAX_MAC_SIZE]; | |
68 | u8 *backup_iv; /*store iv for generated IV flow*/ | |
69 | u8 *backup_giv; /*store iv for rfc3686(ctr) flow*/ | |
70 | dma_addr_t mac_buf_dma_addr; /* internal ICV DMA buffer */ | |
71 | /* buffer for internal ccm configurations */ | |
72 | dma_addr_t ccm_iv0_dma_addr; | |
73 | dma_addr_t icv_dma_addr; /* Phys. address of ICV */ | |
74 | ||
75 | //used in gcm | |
76 | /* buffer for internal gcm configurations */ | |
77 | dma_addr_t gcm_iv_inc1_dma_addr; | |
78 | /* buffer for internal gcm configurations */ | |
79 | dma_addr_t gcm_iv_inc2_dma_addr; | |
80 | dma_addr_t hkey_dma_addr; /* Phys. address of hkey */ | |
81 | dma_addr_t gcm_block_len_dma_addr; /* Phys. address of gcm block len */ | |
82 | bool is_gcm4543; | |
83 | ||
84 | u8 *icv_virt_addr; /* Virt. address of ICV */ | |
85 | struct async_gen_req_ctx gen_ctx; | |
86 | struct cc_mlli assoc; | |
87 | struct cc_mlli src; | |
88 | struct cc_mlli dst; | |
89 | struct scatterlist *src_sgl; | |
90 | struct scatterlist *dst_sgl; | |
91 | unsigned int src_offset; | |
92 | unsigned int dst_offset; | |
93 | enum cc_req_dma_buf_type assoc_buff_type; | |
94 | enum cc_req_dma_buf_type data_buff_type; | |
95 | struct mlli_params mlli_params; | |
96 | unsigned int cryptlen; | |
97 | struct scatterlist ccm_adata_sg; | |
98 | enum aead_ccm_header_size ccm_hdr_size; | |
99 | unsigned int req_authsize; | |
100 | enum drv_cipher_mode cipher_mode; | |
101 | bool is_icv_fragmented; | |
102 | bool is_single_pass; | |
103 | bool plaintext_authenticate_only; //for gcm_rfc4543 | |
104 | }; | |
105 | ||
106 | int cc_aead_alloc(struct cc_drvdata *drvdata); | |
107 | int cc_aead_free(struct cc_drvdata *drvdata); | |
108 | ||
109 | #endif /*__CC_AEAD_H__*/ |