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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 SPU-M.
8 */
9
10#ifndef _SPUM_H_
11#define _SPUM_H_
12
13#define SPU_CRYPTO_OPERATION_GENERIC 0x1
14
15/* Length of STATUS field in tx and rx packets */
16#define SPU_TX_STATUS_LEN 4
17
18/* SPU-M error codes */
19#define SPU_STATUS_MASK 0x0000FF00
20#define SPU_STATUS_SUCCESS 0x00000000
21#define SPU_STATUS_INVALID_ICV 0x00000100
22
23#define SPU_STATUS_ERROR_FLAG 0x00020000
24
25/* Request message. MH + EMH + BDESC + BD header */
26#define SPU_REQ_FIXED_LEN 24
27
28/*
29 * Max length of a SPU message header. Used to allocate a buffer where
30 * the SPU message header is constructed. Can be used for either a SPU-M
31 * header or a SPU2 header.
32 * For SPU-M, sum of the following:
33 * MH - 4 bytes
34 * EMH - 4
35 * SCTX - 3 +
36 * max auth key len - 64
37 * max cipher key len - 264 (RC4)
38 * max IV len - 16
39 * BDESC - 12
40 * BD header - 4
41 * Total: 371
42 *
43 * For SPU2, FMD_SIZE (32) plus lengths of hash and cipher keys,
44 * hash and cipher IVs. If SPU2 does not support RC4, then
45 */
46#define SPU_HEADER_ALLOC_LEN (SPU_REQ_FIXED_LEN + MAX_KEY_SIZE + \
47 MAX_KEY_SIZE + MAX_IV_SIZE)
48
49/*
50 * Response message header length. Normally MH, EMH, BD header, but when
51 * BD_SUPPRESS is used for hash requests, there is no BD header.
52 */
53#define SPU_RESP_HDR_LEN 12
54#define SPU_HASH_RESP_HDR_LEN 8
55
56/*
57 * Max value that can be represented in the Payload Length field of the BD
58 * header. This is a 16-bit field.
59 */
60#define SPUM_NS2_MAX_PAYLOAD (BIT(16) - 1)
61
62/*
63 * NSP SPU is limited to ~9KB because of FA2 FIFO size limitations;
64 * Set MAX_PAYLOAD to 8k to allow for addition of header, digest, etc.
65 * and stay within limitation.
66 */
67
68#define SPUM_NSP_MAX_PAYLOAD 8192
69
70/* Buffer Descriptor Header [BDESC]. SPU in big-endian mode. */
71struct BDESC_HEADER {
72 __be16 offset_mac; /* word 0 [31-16] */
73 __be16 length_mac; /* word 0 [15-0] */
74 __be16 offset_crypto; /* word 1 [31-16] */
75 __be16 length_crypto; /* word 1 [15-0] */
76 __be16 offset_icv; /* word 2 [31-16] */
77 __be16 offset_iv; /* word 2 [15-0] */
78};
79
80/* Buffer Data Header [BD]. SPU in big-endian mode. */
81struct BD_HEADER {
82 __be16 size;
83 __be16 prev_length;
84};
85
86/* Command Context Header. SPU-M in big endian mode. */
87struct MHEADER {
88 u8 flags; /* [31:24] */
89 u8 op_code; /* [23:16] */
90 u16 reserved; /* [15:0] */
91};
92
93/* MH header flags bits */
94#define MH_SUPDT_PRES BIT(0)
95#define MH_HASH_PRES BIT(2)
96#define MH_BD_PRES BIT(3)
97#define MH_MFM_PRES BIT(4)
98#define MH_BDESC_PRES BIT(5)
99#define MH_SCTX_PRES BIT(7)
100
101/* SCTX word 0 bit offsets and fields masks */
102#define SCTX_SIZE 0x000000FF
103
104/* SCTX word 1 bit shifts and field masks */
105#define UPDT_OFST 0x000000FF /* offset of SCTX updateable fld */
106#define HASH_TYPE 0x00000300 /* hash alg operation type */
107#define HASH_TYPE_SHIFT 8
108#define HASH_MODE 0x00001C00 /* one of spu2_hash_mode */
109#define HASH_MODE_SHIFT 10
110#define HASH_ALG 0x0000E000 /* hash algorithm */
111#define HASH_ALG_SHIFT 13
112#define CIPHER_TYPE 0x00030000 /* encryption operation type */
113#define CIPHER_TYPE_SHIFT 16
114#define CIPHER_MODE 0x001C0000 /* encryption mode */
115#define CIPHER_MODE_SHIFT 18
116#define CIPHER_ALG 0x00E00000 /* encryption algo */
117#define CIPHER_ALG_SHIFT 21
118#define ICV_IS_512 BIT(27)
119#define ICV_IS_512_SHIFT 27
120#define CIPHER_ORDER BIT(30)
121#define CIPHER_ORDER_SHIFT 30
122#define CIPHER_INBOUND BIT(31)
123#define CIPHER_INBOUND_SHIFT 31
124
125/* SCTX word 2 bit shifts and field masks */
126#define EXP_IV_SIZE 0x7
127#define IV_OFFSET BIT(3)
128#define IV_OFFSET_SHIFT 3
129#define GEN_IV BIT(5)
130#define GEN_IV_SHIFT 5
131#define EXPLICIT_IV BIT(6)
132#define EXPLICIT_IV_SHIFT 6
133#define SCTX_IV BIT(7)
134#define SCTX_IV_SHIFT 7
135#define ICV_SIZE 0x0F00
136#define ICV_SIZE_SHIFT 8
137#define CHECK_ICV BIT(12)
138#define CHECK_ICV_SHIFT 12
139#define INSERT_ICV BIT(13)
140#define INSERT_ICV_SHIFT 13
141#define BD_SUPPRESS BIT(19)
142#define BD_SUPPRESS_SHIFT 19
143
144/* Generic Mode Security Context Structure [SCTX] */
145struct SCTX {
146/* word 0: protocol flags */
147 __be32 proto_flags;
148
149/* word 1: cipher flags */
150 __be32 cipher_flags;
151
152/* word 2: Extended cipher flags */
153 __be32 ecf;
154
155};
156
157struct SPUHEADER {
158 struct MHEADER mh;
159 u32 emh;
160 struct SCTX sa;
161};
162
163#endif /* _SPUM_H_ */
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 SPU-M.
8 */
9
10#ifndef _SPUM_H_
11#define _SPUM_H_
12
13#define SPU_CRYPTO_OPERATION_GENERIC 0x1
14
15/* Length of STATUS field in tx and rx packets */
16#define SPU_TX_STATUS_LEN 4
17
18/* SPU-M error codes */
19#define SPU_STATUS_MASK 0x0000FF00
20#define SPU_STATUS_SUCCESS 0x00000000
21#define SPU_STATUS_INVALID_ICV 0x00000100
22
23#define SPU_STATUS_ERROR_FLAG 0x00020000
24
25/* Request message. MH + EMH + BDESC + BD header */
26#define SPU_REQ_FIXED_LEN 24
27
28/*
29 * Max length of a SPU message header. Used to allocate a buffer where
30 * the SPU message header is constructed. Can be used for either a SPU-M
31 * header or a SPU2 header.
32 * For SPU-M, sum of the following:
33 * MH - 4 bytes
34 * EMH - 4
35 * SCTX - 3 +
36 * max auth key len - 64
37 * max cipher key len - 264 (RC4)
38 * max IV len - 16
39 * BDESC - 12
40 * BD header - 4
41 * Total: 371
42 *
43 * For SPU2, FMD_SIZE (32) plus lengths of hash and cipher keys,
44 * hash and cipher IVs. If SPU2 does not support RC4, then
45 */
46#define SPU_HEADER_ALLOC_LEN (SPU_REQ_FIXED_LEN + MAX_KEY_SIZE + \
47 MAX_KEY_SIZE + MAX_IV_SIZE)
48
49/*
50 * Response message header length. Normally MH, EMH, BD header, but when
51 * BD_SUPPRESS is used for hash requests, there is no BD header.
52 */
53#define SPU_RESP_HDR_LEN 12
54#define SPU_HASH_RESP_HDR_LEN 8
55
56/*
57 * Max value that can be represented in the Payload Length field of the BD
58 * header. This is a 16-bit field.
59 */
60#define SPUM_NS2_MAX_PAYLOAD (BIT(16) - 1)
61
62/*
63 * NSP SPU is limited to ~9KB because of FA2 FIFO size limitations;
64 * Set MAX_PAYLOAD to 8k to allow for addition of header, digest, etc.
65 * and stay within limitation.
66 */
67
68#define SPUM_NSP_MAX_PAYLOAD 8192
69
70/* Buffer Descriptor Header [BDESC]. SPU in big-endian mode. */
71struct BDESC_HEADER {
72 u16 offset_mac; /* word 0 [31-16] */
73 u16 length_mac; /* word 0 [15-0] */
74 u16 offset_crypto; /* word 1 [31-16] */
75 u16 length_crypto; /* word 1 [15-0] */
76 u16 offset_icv; /* word 2 [31-16] */
77 u16 offset_iv; /* word 2 [15-0] */
78};
79
80/* Buffer Data Header [BD]. SPU in big-endian mode. */
81struct BD_HEADER {
82 u16 size;
83 u16 prev_length;
84};
85
86/* Command Context Header. SPU-M in big endian mode. */
87struct MHEADER {
88 u8 flags; /* [31:24] */
89 u8 op_code; /* [23:16] */
90 u16 reserved; /* [15:0] */
91};
92
93/* MH header flags bits */
94#define MH_SUPDT_PRES BIT(0)
95#define MH_HASH_PRES BIT(2)
96#define MH_BD_PRES BIT(3)
97#define MH_MFM_PRES BIT(4)
98#define MH_BDESC_PRES BIT(5)
99#define MH_SCTX_PRES BIT(7)
100
101/* SCTX word 0 bit offsets and fields masks */
102#define SCTX_SIZE 0x000000FF
103
104/* SCTX word 1 bit shifts and field masks */
105#define UPDT_OFST 0x000000FF /* offset of SCTX updateable fld */
106#define HASH_TYPE 0x00000300 /* hash alg operation type */
107#define HASH_TYPE_SHIFT 8
108#define HASH_MODE 0x00001C00 /* one of spu2_hash_mode */
109#define HASH_MODE_SHIFT 10
110#define HASH_ALG 0x0000E000 /* hash algorithm */
111#define HASH_ALG_SHIFT 13
112#define CIPHER_TYPE 0x00030000 /* encryption operation type */
113#define CIPHER_TYPE_SHIFT 16
114#define CIPHER_MODE 0x001C0000 /* encryption mode */
115#define CIPHER_MODE_SHIFT 18
116#define CIPHER_ALG 0x00E00000 /* encryption algo */
117#define CIPHER_ALG_SHIFT 21
118#define ICV_IS_512 BIT(27)
119#define ICV_IS_512_SHIFT 27
120#define CIPHER_ORDER BIT(30)
121#define CIPHER_ORDER_SHIFT 30
122#define CIPHER_INBOUND BIT(31)
123#define CIPHER_INBOUND_SHIFT 31
124
125/* SCTX word 2 bit shifts and field masks */
126#define EXP_IV_SIZE 0x7
127#define IV_OFFSET BIT(3)
128#define IV_OFFSET_SHIFT 3
129#define GEN_IV BIT(5)
130#define GEN_IV_SHIFT 5
131#define EXPLICIT_IV BIT(6)
132#define EXPLICIT_IV_SHIFT 6
133#define SCTX_IV BIT(7)
134#define SCTX_IV_SHIFT 7
135#define ICV_SIZE 0x0F00
136#define ICV_SIZE_SHIFT 8
137#define CHECK_ICV BIT(12)
138#define CHECK_ICV_SHIFT 12
139#define INSERT_ICV BIT(13)
140#define INSERT_ICV_SHIFT 13
141#define BD_SUPPRESS BIT(19)
142#define BD_SUPPRESS_SHIFT 19
143
144/* Generic Mode Security Context Structure [SCTX] */
145struct SCTX {
146/* word 0: protocol flags */
147 u32 proto_flags;
148
149/* word 1: cipher flags */
150 u32 cipher_flags;
151
152/* word 2: Extended cipher flags */
153 u32 ecf;
154
155};
156
157struct SPUHEADER {
158 struct MHEADER mh;
159 u32 emh;
160 struct SCTX sa;
161};
162
163#endif /* _SPUM_H_ */