1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright 2016 Broadcom
4  */
5 
6 /*
7  * This file contains SPU message definitions specific to SPU2.
8  */
9 
10 #ifndef _SPU2_H
11 #define _SPU2_H
12 
13 enum spu2_cipher_type {
14 	SPU2_CIPHER_TYPE_NONE = 0x0,
15 	SPU2_CIPHER_TYPE_AES128 = 0x1,
16 	SPU2_CIPHER_TYPE_AES192 = 0x2,
17 	SPU2_CIPHER_TYPE_AES256 = 0x3,
18 	SPU2_CIPHER_TYPE_DES = 0x4,
19 	SPU2_CIPHER_TYPE_3DES = 0x5,
20 	SPU2_CIPHER_TYPE_LAST
21 };
22 
23 enum spu2_cipher_mode {
24 	SPU2_CIPHER_MODE_ECB = 0x0,
25 	SPU2_CIPHER_MODE_CBC = 0x1,
26 	SPU2_CIPHER_MODE_CTR = 0x2,
27 	SPU2_CIPHER_MODE_CFB = 0x3,
28 	SPU2_CIPHER_MODE_OFB = 0x4,
29 	SPU2_CIPHER_MODE_XTS = 0x5,
30 	SPU2_CIPHER_MODE_CCM = 0x6,
31 	SPU2_CIPHER_MODE_GCM = 0x7,
32 	SPU2_CIPHER_MODE_LAST
33 };
34 
35 enum spu2_hash_type {
36 	SPU2_HASH_TYPE_NONE = 0x0,
37 	SPU2_HASH_TYPE_AES128 = 0x1,
38 	SPU2_HASH_TYPE_AES192 = 0x2,
39 	SPU2_HASH_TYPE_AES256 = 0x3,
40 	SPU2_HASH_TYPE_MD5 = 0x6,
41 	SPU2_HASH_TYPE_SHA1 = 0x7,
42 	SPU2_HASH_TYPE_SHA224 = 0x8,
43 	SPU2_HASH_TYPE_SHA256 = 0x9,
44 	SPU2_HASH_TYPE_SHA384 = 0xa,
45 	SPU2_HASH_TYPE_SHA512 = 0xb,
46 	SPU2_HASH_TYPE_SHA512_224 = 0xc,
47 	SPU2_HASH_TYPE_SHA512_256 = 0xd,
48 	SPU2_HASH_TYPE_SHA3_224 = 0xe,
49 	SPU2_HASH_TYPE_SHA3_256 = 0xf,
50 	SPU2_HASH_TYPE_SHA3_384 = 0x10,
51 	SPU2_HASH_TYPE_SHA3_512 = 0x11,
52 	SPU2_HASH_TYPE_LAST
53 };
54 
55 enum spu2_hash_mode {
56 	SPU2_HASH_MODE_CMAC = 0x0,
57 	SPU2_HASH_MODE_CBC_MAC = 0x1,
58 	SPU2_HASH_MODE_XCBC_MAC = 0x2,
59 	SPU2_HASH_MODE_HMAC = 0x3,
60 	SPU2_HASH_MODE_RABIN = 0x4,
61 	SPU2_HASH_MODE_CCM = 0x5,
62 	SPU2_HASH_MODE_GCM = 0x6,
63 	SPU2_HASH_MODE_RESERVED = 0x7,
64 	SPU2_HASH_MODE_LAST
65 };
66 
67 enum spu2_ret_md_opts {
68 	SPU2_RET_NO_MD = 0,	/* return no metadata */
69 	SPU2_RET_FMD_OMD = 1,	/* return both FMD and OMD */
70 	SPU2_RET_FMD_ONLY = 2,	/* return only FMD */
71 	SPU2_RET_FMD_OMD_IV = 3,	/* return FMD and OMD with just IVs */
72 };
73 
74 /* Fixed Metadata format */
75 struct SPU2_FMD {
76 	__le64 ctrl0;
77 	__le64 ctrl1;
78 	__le64 ctrl2;
79 	__le64 ctrl3;
80 };
81 
82 #define FMD_SIZE  sizeof(struct SPU2_FMD)
83 
84 /* Fixed part of request message header length in bytes. Just FMD. */
85 #define SPU2_REQ_FIXED_LEN FMD_SIZE
86 #define SPU2_HEADER_ALLOC_LEN (SPU_REQ_FIXED_LEN + \
87 				2 * MAX_KEY_SIZE + 2 * MAX_IV_SIZE)
88 
89 /* FMD ctrl0 field masks */
90 #define SPU2_CIPH_ENCRYPT_EN            0x1 /* 0: decrypt, 1: encrypt */
91 #define SPU2_CIPH_TYPE                 0xF0 /* one of spu2_cipher_type */
92 #define SPU2_CIPH_TYPE_SHIFT              4
93 #define SPU2_CIPH_MODE                0xF00 /* one of spu2_cipher_mode */
94 #define SPU2_CIPH_MODE_SHIFT              8
95 #define SPU2_CFB_MASK                0x7000 /* cipher feedback mask */
96 #define SPU2_CFB_MASK_SHIFT              12
97 #define SPU2_PROTO_SEL             0xF00000 /* MACsec, IPsec, TLS... */
98 #define SPU2_PROTO_SEL_SHIFT             20
99 #define SPU2_HASH_FIRST           0x1000000 /* 1: hash input is input pkt
100 					     * data
101 					     */
102 #define SPU2_CHK_TAG              0x2000000 /* 1: check digest provided */
103 #define SPU2_HASH_TYPE          0x1F0000000 /* one of spu2_hash_type */
104 #define SPU2_HASH_TYPE_SHIFT             28
105 #define SPU2_HASH_MODE         0xF000000000 /* one of spu2_hash_mode */
106 #define SPU2_HASH_MODE_SHIFT             36
107 #define SPU2_CIPH_PAD_EN     0x100000000000 /* 1: Add pad to end of payload for
108 					     *    enc
109 					     */
110 #define SPU2_CIPH_PAD      0xFF000000000000 /* cipher pad value */
111 #define SPU2_CIPH_PAD_SHIFT              48
112 
113 /* FMD ctrl1 field masks */
114 #define SPU2_TAG_LOC                    0x1 /* 1: end of payload, 0: undef */
115 #define SPU2_HAS_FR_DATA                0x2 /* 1: msg has frame data */
116 #define SPU2_HAS_AAD1                   0x4 /* 1: msg has AAD1 field */
117 #define SPU2_HAS_NAAD                   0x8 /* 1: msg has NAAD field */
118 #define SPU2_HAS_AAD2                  0x10 /* 1: msg has AAD2 field */
119 #define SPU2_HAS_ESN                   0x20 /* 1: msg has ESN field */
120 #define SPU2_HASH_KEY_LEN            0xFF00 /* len of hash key in bytes.
121 					     * HMAC only.
122 					     */
123 #define SPU2_HASH_KEY_LEN_SHIFT           8
124 #define SPU2_CIPH_KEY_LEN         0xFF00000 /* len of cipher key in bytes */
125 #define SPU2_CIPH_KEY_LEN_SHIFT          20
126 #define SPU2_GENIV               0x10000000 /* 1: hw generates IV */
127 #define SPU2_HASH_IV             0x20000000 /* 1: IV incl in hash */
128 #define SPU2_RET_IV              0x40000000 /* 1: return IV in output msg
129 					     *    b4 payload
130 					     */
131 #define SPU2_RET_IV_LEN         0xF00000000 /* length in bytes of IV returned.
132 					     * 0 = 16 bytes
133 					     */
134 #define SPU2_RET_IV_LEN_SHIFT            32
135 #define SPU2_IV_OFFSET         0xF000000000 /* gen IV offset */
136 #define SPU2_IV_OFFSET_SHIFT             36
137 #define SPU2_IV_LEN          0x1F0000000000 /* length of input IV in bytes */
138 #define SPU2_IV_LEN_SHIFT                40
139 #define SPU2_HASH_TAG_LEN  0x7F000000000000 /* hash tag length in bytes */
140 #define SPU2_HASH_TAG_LEN_SHIFT          48
141 #define SPU2_RETURN_MD    0x300000000000000 /* return metadata */
142 #define SPU2_RETURN_MD_SHIFT             56
143 #define SPU2_RETURN_FD    0x400000000000000
144 #define SPU2_RETURN_AAD1  0x800000000000000
145 #define SPU2_RETURN_NAAD 0x1000000000000000
146 #define SPU2_RETURN_AAD2 0x2000000000000000
147 #define SPU2_RETURN_PAY  0x4000000000000000 /* return payload */
148 
149 /* FMD ctrl2 field masks */
150 #define SPU2_AAD1_OFFSET              0xFFF /* byte offset of AAD1 field */
151 #define SPU2_AAD1_LEN               0xFF000 /* length of AAD1 in bytes */
152 #define SPU2_AAD1_LEN_SHIFT              12
153 #define SPU2_AAD2_OFFSET         0xFFF00000 /* byte offset of AAD2 field */
154 #define SPU2_AAD2_OFFSET_SHIFT           20
155 #define SPU2_PL_OFFSET   0xFFFFFFFF00000000 /* payload offset from AAD2 */
156 #define SPU2_PL_OFFSET_SHIFT             32
157 
158 /* FMD ctrl3 field masks */
159 #define SPU2_PL_LEN              0xFFFFFFFF /* payload length in bytes */
160 #define SPU2_TLS_LEN         0xFFFF00000000 /* TLS encrypt: cipher len
161 					     * TLS decrypt: compressed len
162 					     */
163 #define SPU2_TLS_LEN_SHIFT               32
164 
165 /*
166  * Max value that can be represented in the Payload Length field of the
167  * ctrl3 word of FMD.
168  */
169 #define SPU2_MAX_PAYLOAD  SPU2_PL_LEN
170 
171 /* Error values returned in STATUS field of response messages */
172 #define SPU2_INVALID_ICV  1
173 
174 void spu2_dump_msg_hdr(u8 *buf, unsigned int buf_len);
175 u32 spu2_ctx_max_payload(enum spu_cipher_alg cipher_alg,
176 			 enum spu_cipher_mode cipher_mode,
177 			 unsigned int blocksize);
178 u32 spu2_payload_length(u8 *spu_hdr);
179 u16 spu2_response_hdr_len(u16 auth_key_len, u16 enc_key_len, bool is_hash);
180 u16 spu2_hash_pad_len(enum hash_alg hash_alg, enum hash_mode hash_mode,
181 		      u32 chunksize, u16 hash_block_size);
182 u32 spu2_gcm_ccm_pad_len(enum spu_cipher_mode cipher_mode,
183 			 unsigned int data_size);
184 u32 spu2_assoc_resp_len(enum spu_cipher_mode cipher_mode,
185 			unsigned int assoc_len, unsigned int iv_len,
186 			bool is_encrypt);
187 u8 spu2_aead_ivlen(enum spu_cipher_mode cipher_mode,
188 		   u16 iv_len);
189 enum hash_type spu2_hash_type(u32 src_sent);
190 u32 spu2_digest_size(u32 alg_digest_size, enum hash_alg alg,
191 		     enum hash_type htype);
192 u32 spu2_create_request(u8 *spu_hdr,
193 			struct spu_request_opts *req_opts,
194 			struct spu_cipher_parms *cipher_parms,
195 			struct spu_hash_parms *hash_parms,
196 			struct spu_aead_parms *aead_parms,
197 			unsigned int data_size);
198 u16 spu2_cipher_req_init(u8 *spu_hdr, struct spu_cipher_parms *cipher_parms);
199 void spu2_cipher_req_finish(u8 *spu_hdr,
200 			    u16 spu_req_hdr_len,
201 			    unsigned int is_inbound,
202 			    struct spu_cipher_parms *cipher_parms,
203 			    unsigned int data_size);
204 void spu2_request_pad(u8 *pad_start, u32 gcm_padding, u32 hash_pad_len,
205 		      enum hash_alg auth_alg, enum hash_mode auth_mode,
206 		      unsigned int total_sent, u32 status_padding);
207 u8 spu2_xts_tweak_in_payload(void);
208 u8 spu2_tx_status_len(void);
209 u8 spu2_rx_status_len(void);
210 int spu2_status_process(u8 *statp);
211 void spu2_ccm_update_iv(unsigned int digestsize,
212 			struct spu_cipher_parms *cipher_parms,
213 			unsigned int assoclen, unsigned int chunksize,
214 			bool is_encrypt, bool is_esp);
215 u32 spu2_wordalign_padlen(u32 data_size);
216 #endif
217