1 /* SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0)
3 * Copyright 2008-2016 Freescale Semiconductor Inc.
8 #ifndef __RTA_KEY_CMD_H__
9 #define __RTA_KEY_CMD_H__
11 extern enum rta_sec_era rta_sec_era;
13 /* Allowed encryption flags for each SEC Era */
14 static const uint32_t key_enc_flags[] = {
21 ENC | NWB | EKT | TK | PTS,
22 ENC | NWB | EKT | TK | PTS
26 rta_key(struct program *program, uint32_t key_dst,
27 uint32_t encrypt_flags, uint64_t src, uint32_t length,
31 bool is_seq_cmd = false;
32 unsigned int start_pc = program->current_pc;
34 if (encrypt_flags & ~key_enc_flags[rta_sec_era]) {
35 pr_err("KEY: Flag(s) not supported by SEC Era %d\n",
36 USER_SEC_ERA(rta_sec_era));
48 /* check parameters */
50 if ((flags & IMMED) || (flags & SGF)) {
51 pr_err("SEQKEY: Invalid flag. SEC PC: %d; Instr: %d\n",
53 program->current_instruction);
56 if ((rta_sec_era <= RTA_SEC_ERA_5) &&
57 ((flags & VLF) || (flags & AIDF))) {
58 pr_err("SEQKEY: Flag(s) not supported by SEC Era %d\n",
59 USER_SEC_ERA(rta_sec_era));
63 if ((flags & AIDF) || (flags & VLF)) {
64 pr_err("KEY: Invalid flag. SEC PC: %d; Instr: %d\n",
66 program->current_instruction);
69 if ((flags & SGF) && (flags & IMMED)) {
70 pr_err("KEY: Invalid flag. SEC PC: %d; Instr: %d\n",
72 program->current_instruction);
77 if ((encrypt_flags & PTS) &&
78 ((encrypt_flags & ENC) || (encrypt_flags & NWB) ||
80 pr_err("KEY: Invalid flag / destination. SEC PC: %d; Instr: %d\n",
81 program->current_pc, program->current_instruction);
85 if (key_dst == AFHA_SBOX) {
86 if (rta_sec_era == RTA_SEC_ERA_7) {
87 pr_err("KEY: AFHA S-box not supported by SEC Era %d\n",
88 USER_SEC_ERA(rta_sec_era));
93 pr_err("KEY: Invalid flag. SEC PC: %d; Instr: %d\n",
95 program->current_instruction);
100 * Sbox data loaded into the ARC-4 processor must be exactly
101 * 258 bytes long, or else a data sequence error is generated.
104 pr_err("KEY: Invalid length. SEC PC: %d; Instr: %d\n",
106 program->current_instruction);
111 /* write key destination and class fields */
114 opcode |= KEY_DEST_CLASS1;
117 opcode |= KEY_DEST_CLASS2;
120 opcode |= KEY_DEST_CLASS1 | KEY_DEST_PKHA_E;
123 opcode |= KEY_DEST_CLASS1 | KEY_DEST_AFHA_SBOX;
125 case (MDHA_SPLIT_KEY):
126 opcode |= KEY_DEST_CLASS2 | KEY_DEST_MDHA_SPLIT;
129 pr_err("KEY: Invalid destination. SEC PC: %d; Instr: %d\n",
130 program->current_pc, program->current_instruction);
134 /* write key length */
135 length &= KEY_LENGTH_MASK;
138 /* write key command specific flags */
139 if (encrypt_flags & ENC) {
140 /* Encrypted (black) keys must be padded to 8 bytes (CCM) or
141 * 16 bytes (ECB) depending on EKT bit. AES-CCM encrypted keys
142 * (EKT = 1) have 6-byte nonce and 6-byte MAC after padding.
145 if (encrypt_flags & EKT) {
147 length = ALIGN(length, 8);
150 length = ALIGN(length, 16);
152 if (encrypt_flags & TK)
155 if (encrypt_flags & NWB)
157 if (encrypt_flags & PTS)
160 /* write general command flags */
173 __rta_out32(program, opcode);
174 program->current_instruction++;
177 __rta_inline_data(program, src, flags & __COPY_MASK, length);
179 __rta_out64(program, program->ps, src);
181 return (int)start_pc;
184 program->first_error_pc = start_pc;
185 program->current_instruction++;
189 #endif /* __RTA_KEY_CMD_H__ */