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. */ 71 struct 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. */ 81 struct BD_HEADER { 82 __be16 size; 83 __be16 prev_length; 84 }; 85 86 /* Command Context Header. SPU-M in big endian mode. */ 87 struct 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] */ 145 struct 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 }; 156 157 struct SPUHEADER { 158 struct MHEADER mh; 159 u32 emh; 160 struct SCTX sa; 161 }; 162 163 #endif /* _SPUM_H_ */ 164