diff options
Diffstat (limited to 'drivers/crypto/dpaa2_sec/hw/rta/key_cmd.h')
| -rw-r--r-- | drivers/crypto/dpaa2_sec/hw/rta/key_cmd.h | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/drivers/crypto/dpaa2_sec/hw/rta/key_cmd.h b/drivers/crypto/dpaa2_sec/hw/rta/key_cmd.h new file mode 100644 index 00000000..9bef1155 --- /dev/null +++ b/drivers/crypto/dpaa2_sec/hw/rta/key_cmd.h @@ -0,0 +1,222 @@ +/*- + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * BSD LICENSE + * + * Copyright 2008-2016 Freescale Semiconductor Inc. + * Copyright (c) 2016 NXP. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of the above-listed copyright holders nor the + * names of any contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * GPL LICENSE SUMMARY + * + * ALTERNATIVELY, this software may be distributed under the terms of the + * GNU General Public License ("GPL") as published by the Free Software + * Foundation, either version 2 of that License or (at your option) any + * later version. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __RTA_KEY_CMD_H__ +#define __RTA_KEY_CMD_H__ + +extern enum rta_sec_era rta_sec_era; + +/* Allowed encryption flags for each SEC Era */ +static const uint32_t key_enc_flags[] = { + ENC, + ENC | NWB | EKT | TK, + ENC | NWB | EKT | TK, + ENC | NWB | EKT | TK, + ENC | NWB | EKT | TK, + ENC | NWB | EKT | TK, + ENC | NWB | EKT | TK | PTS, + ENC | NWB | EKT | TK | PTS +}; + +static inline int +rta_key(struct program *program, uint32_t key_dst, + uint32_t encrypt_flags, uint64_t src, uint32_t length, + uint32_t flags) +{ + uint32_t opcode = 0; + bool is_seq_cmd = false; + unsigned int start_pc = program->current_pc; + + if (encrypt_flags & ~key_enc_flags[rta_sec_era]) { + pr_err("KEY: Flag(s) not supported by SEC Era %d\n", + USER_SEC_ERA(rta_sec_era)); + goto err; + } + + /* write cmd type */ + if (flags & SEQ) { + opcode = CMD_SEQ_KEY; + is_seq_cmd = true; + } else { + opcode = CMD_KEY; + } + + /* check parameters */ + if (is_seq_cmd) { + if ((flags & IMMED) || (flags & SGF)) { + pr_err("SEQKEY: Invalid flag. SEC PC: %d; Instr: %d\n", + program->current_pc, + program->current_instruction); + goto err; + } + if ((rta_sec_era <= RTA_SEC_ERA_5) && + ((flags & VLF) || (flags & AIDF))) { + pr_err("SEQKEY: Flag(s) not supported by SEC Era %d\n", + USER_SEC_ERA(rta_sec_era)); + goto err; + } + } else { + if ((flags & AIDF) || (flags & VLF)) { + pr_err("KEY: Invalid flag. SEC PC: %d; Instr: %d\n", + program->current_pc, + program->current_instruction); + goto err; + } + if ((flags & SGF) && (flags & IMMED)) { + pr_err("KEY: Invalid flag. SEC PC: %d; Instr: %d\n", + program->current_pc, + program->current_instruction); + goto err; + } + } + + if ((encrypt_flags & PTS) && + ((encrypt_flags & ENC) || (encrypt_flags & NWB) || + (key_dst == PKE))) { + pr_err("KEY: Invalid flag / destination. SEC PC: %d; Instr: %d\n", + program->current_pc, program->current_instruction); + goto err; + } + + if (key_dst == AFHA_SBOX) { + if (rta_sec_era == RTA_SEC_ERA_7) { + pr_err("KEY: AFHA S-box not supported by SEC Era %d\n", + USER_SEC_ERA(rta_sec_era)); + goto err; + } + + if (flags & IMMED) { + pr_err("KEY: Invalid flag. SEC PC: %d; Instr: %d\n", + program->current_pc, + program->current_instruction); + goto err; + } + + /* + * Sbox data loaded into the ARC-4 processor must be exactly + * 258 bytes long, or else a data sequence error is generated. + */ + if (length != 258) { + pr_err("KEY: Invalid length. SEC PC: %d; Instr: %d\n", + program->current_pc, + program->current_instruction); + goto err; + } + } + + /* write key destination and class fields */ + switch (key_dst) { + case (KEY1): + opcode |= KEY_DEST_CLASS1; + break; + case (KEY2): + opcode |= KEY_DEST_CLASS2; + break; + case (PKE): + opcode |= KEY_DEST_CLASS1 | KEY_DEST_PKHA_E; + break; + case (AFHA_SBOX): + opcode |= KEY_DEST_CLASS1 | KEY_DEST_AFHA_SBOX; + break; + case (MDHA_SPLIT_KEY): + opcode |= KEY_DEST_CLASS2 | KEY_DEST_MDHA_SPLIT; + break; + default: + pr_err("KEY: Invalid destination. SEC PC: %d; Instr: %d\n", + program->current_pc, program->current_instruction); + goto err; + } + + /* write key length */ + length &= KEY_LENGTH_MASK; + opcode |= length; + + /* write key command specific flags */ + if (encrypt_flags & ENC) { + /* Encrypted (black) keys must be padded to 8 bytes (CCM) or + * 16 bytes (ECB) depending on EKT bit. AES-CCM encrypted keys + * (EKT = 1) have 6-byte nonce and 6-byte MAC after padding. + */ + opcode |= KEY_ENC; + if (encrypt_flags & EKT) { + opcode |= KEY_EKT; + length = ALIGN(length, 8); + length += 12; + } else { + length = ALIGN(length, 16); + } + if (encrypt_flags & TK) + opcode |= KEY_TK; + } + if (encrypt_flags & NWB) + opcode |= KEY_NWB; + if (encrypt_flags & PTS) + opcode |= KEY_PTS; + + /* write general command flags */ + if (!is_seq_cmd) { + if (flags & IMMED) + opcode |= KEY_IMM; + if (flags & SGF) + opcode |= KEY_SGF; + } else { + if (flags & AIDF) + opcode |= KEY_AIDF; + if (flags & VLF) + opcode |= KEY_VLF; + } + + __rta_out32(program, opcode); + program->current_instruction++; + + if (flags & IMMED) + __rta_inline_data(program, src, flags & __COPY_MASK, length); + else + __rta_out64(program, program->ps, src); + + return (int)start_pc; + + err: + program->first_error_pc = start_pc; + program->current_instruction++; + return -EINVAL; +} + +#endif /* __RTA_KEY_CMD_H__ */ |