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7cea6d3e01
Commit 7a7ffe65c8 ("crypto: skcipher - Add top-level skcipher interface")
dated 20 august 2015 introduced the new skcipher API which is supposed to
replace both blkcipher and ablkcipher. While all consumers of the API have
been converted long ago, some producers of the ablkcipher remain, forcing
us to keep the ablkcipher support routines alive, along with the matching
code to expose [a]blkciphers via the skcipher API.
So switch this driver to the skcipher API, allowing us to finally drop the
ablkcipher code in the near future.
Cc: Atul Gupta <atul.gupta@chelsio.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
340 lines
10 KiB
C
340 lines
10 KiB
C
/*
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* This file is part of the Chelsio T6 Crypto driver for Linux.
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*
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* Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#ifndef __CHCR_CRYPTO_H__
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#define __CHCR_CRYPTO_H__
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#define GHASH_BLOCK_SIZE 16
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#define GHASH_DIGEST_SIZE 16
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#define CCM_B0_SIZE 16
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#define CCM_AAD_FIELD_SIZE 2
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// 511 - 16(For IV)
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#define T6_MAX_AAD_SIZE 495
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/* Define following if h/w is not dropping the AAD and IV data before
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* giving the processed data
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*/
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#define CHCR_CRA_PRIORITY 500
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#define CHCR_AEAD_PRIORITY 6000
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#define CHCR_AES_MAX_KEY_LEN (2 * (AES_MAX_KEY_SIZE)) /* consider xts */
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#define CHCR_MAX_CRYPTO_IV_LEN 16 /* AES IV len */
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#define CHCR_MAX_AUTHENC_AES_KEY_LEN 32 /* max aes key length*/
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#define CHCR_MAX_AUTHENC_SHA_KEY_LEN 128 /* max sha key length*/
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#define CHCR_GIVENCRYPT_OP 2
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/* CPL/SCMD parameters */
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#define CHCR_ENCRYPT_OP 0
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#define CHCR_DECRYPT_OP 1
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#define CHCR_SCMD_SEQ_NO_CTRL_32BIT 1
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#define CHCR_SCMD_SEQ_NO_CTRL_48BIT 2
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#define CHCR_SCMD_SEQ_NO_CTRL_64BIT 3
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#define CHCR_SCMD_PROTO_VERSION_GENERIC 4
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#define CHCR_SCMD_AUTH_CTRL_AUTH_CIPHER 0
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#define CHCR_SCMD_AUTH_CTRL_CIPHER_AUTH 1
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#define CHCR_SCMD_CIPHER_MODE_NOP 0
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#define CHCR_SCMD_CIPHER_MODE_AES_CBC 1
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#define CHCR_SCMD_CIPHER_MODE_AES_GCM 2
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#define CHCR_SCMD_CIPHER_MODE_AES_CTR 3
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#define CHCR_SCMD_CIPHER_MODE_GENERIC_AES 4
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#define CHCR_SCMD_CIPHER_MODE_AES_XTS 6
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#define CHCR_SCMD_CIPHER_MODE_AES_CCM 7
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#define CHCR_SCMD_AUTH_MODE_NOP 0
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#define CHCR_SCMD_AUTH_MODE_SHA1 1
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#define CHCR_SCMD_AUTH_MODE_SHA224 2
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#define CHCR_SCMD_AUTH_MODE_SHA256 3
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#define CHCR_SCMD_AUTH_MODE_GHASH 4
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#define CHCR_SCMD_AUTH_MODE_SHA512_224 5
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#define CHCR_SCMD_AUTH_MODE_SHA512_256 6
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#define CHCR_SCMD_AUTH_MODE_SHA512_384 7
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#define CHCR_SCMD_AUTH_MODE_SHA512_512 8
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#define CHCR_SCMD_AUTH_MODE_CBCMAC 9
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#define CHCR_SCMD_AUTH_MODE_CMAC 10
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#define CHCR_SCMD_HMAC_CTRL_NOP 0
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#define CHCR_SCMD_HMAC_CTRL_NO_TRUNC 1
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#define CHCR_SCMD_HMAC_CTRL_TRUNC_RFC4366 2
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#define CHCR_SCMD_HMAC_CTRL_IPSEC_96BIT 3
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#define CHCR_SCMD_HMAC_CTRL_PL1 4
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#define CHCR_SCMD_HMAC_CTRL_PL2 5
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#define CHCR_SCMD_HMAC_CTRL_PL3 6
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#define CHCR_SCMD_HMAC_CTRL_DIV2 7
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#define VERIFY_HW 0
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#define VERIFY_SW 1
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#define CHCR_SCMD_IVGEN_CTRL_HW 0
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#define CHCR_SCMD_IVGEN_CTRL_SW 1
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/* This are not really mac key size. They are intermediate values
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* of sha engine and its size
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*/
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#define CHCR_KEYCTX_MAC_KEY_SIZE_128 0
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#define CHCR_KEYCTX_MAC_KEY_SIZE_160 1
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#define CHCR_KEYCTX_MAC_KEY_SIZE_192 2
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#define CHCR_KEYCTX_MAC_KEY_SIZE_256 3
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#define CHCR_KEYCTX_MAC_KEY_SIZE_512 4
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#define CHCR_KEYCTX_CIPHER_KEY_SIZE_128 0
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#define CHCR_KEYCTX_CIPHER_KEY_SIZE_192 1
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#define CHCR_KEYCTX_CIPHER_KEY_SIZE_256 2
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#define CHCR_KEYCTX_NO_KEY 15
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#define CHCR_CPL_FW4_PLD_IV_OFFSET (5 * 64) /* bytes. flt #5 and #6 */
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#define CHCR_CPL_FW4_PLD_HASH_RESULT_OFFSET (7 * 64) /* bytes. flt #7 */
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#define CHCR_CPL_FW4_PLD_DATA_SIZE (4 * 64) /* bytes. flt #4 to #7 */
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#define KEY_CONTEXT_HDR_SALT_AND_PAD 16
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#define flits_to_bytes(x) (x * 8)
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#define IV_NOP 0
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#define IV_IMMEDIATE 1
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#define IV_DSGL 2
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#define AEAD_H_SIZE 16
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#define CRYPTO_ALG_SUB_TYPE_MASK 0x0f000000
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#define CRYPTO_ALG_SUB_TYPE_HASH_HMAC 0x01000000
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#define CRYPTO_ALG_SUB_TYPE_AEAD_RFC4106 0x02000000
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#define CRYPTO_ALG_SUB_TYPE_AEAD_GCM 0x03000000
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#define CRYPTO_ALG_SUB_TYPE_CBC_SHA 0x04000000
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#define CRYPTO_ALG_SUB_TYPE_AEAD_CCM 0x05000000
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#define CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309 0x06000000
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#define CRYPTO_ALG_SUB_TYPE_CBC_NULL 0x07000000
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#define CRYPTO_ALG_SUB_TYPE_CTR 0x08000000
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#define CRYPTO_ALG_SUB_TYPE_CTR_RFC3686 0x09000000
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#define CRYPTO_ALG_SUB_TYPE_XTS 0x0a000000
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#define CRYPTO_ALG_SUB_TYPE_CBC 0x0b000000
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#define CRYPTO_ALG_SUB_TYPE_CTR_SHA 0x0c000000
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#define CRYPTO_ALG_SUB_TYPE_CTR_NULL 0x0d000000
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#define CRYPTO_ALG_TYPE_HMAC (CRYPTO_ALG_TYPE_AHASH |\
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CRYPTO_ALG_SUB_TYPE_HASH_HMAC)
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#define MAX_SCRATCH_PAD_SIZE 32
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#define CHCR_HASH_MAX_BLOCK_SIZE_64 64
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#define CHCR_HASH_MAX_BLOCK_SIZE_128 128
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#define CHCR_SRC_SG_SIZE (0x10000 - sizeof(int))
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#define CHCR_DST_SG_SIZE 2048
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static inline struct chcr_context *a_ctx(struct crypto_aead *tfm)
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{
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return crypto_aead_ctx(tfm);
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}
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static inline struct chcr_context *c_ctx(struct crypto_skcipher *tfm)
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{
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return crypto_skcipher_ctx(tfm);
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}
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static inline struct chcr_context *h_ctx(struct crypto_ahash *tfm)
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{
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return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
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}
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struct ablk_ctx {
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struct crypto_sync_skcipher *sw_cipher;
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__be32 key_ctx_hdr;
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unsigned int enckey_len;
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unsigned char ciph_mode;
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u8 key[CHCR_AES_MAX_KEY_LEN];
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u8 nonce[4];
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u8 rrkey[AES_MAX_KEY_SIZE];
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};
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struct chcr_aead_reqctx {
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struct sk_buff *skb;
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dma_addr_t iv_dma;
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dma_addr_t b0_dma;
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unsigned int b0_len;
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unsigned int op;
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u16 imm;
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u16 verify;
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u8 iv[CHCR_MAX_CRYPTO_IV_LEN + MAX_SCRATCH_PAD_SIZE];
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u8 *scratch_pad;
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};
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struct ulptx_walk {
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struct ulptx_sgl *sgl;
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unsigned int nents;
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unsigned int pair_idx;
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unsigned int last_sg_len;
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struct scatterlist *last_sg;
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struct ulptx_sge_pair *pair;
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};
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struct dsgl_walk {
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unsigned int nents;
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unsigned int last_sg_len;
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struct scatterlist *last_sg;
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struct cpl_rx_phys_dsgl *dsgl;
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struct phys_sge_pairs *to;
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};
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struct chcr_gcm_ctx {
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u8 ghash_h[AEAD_H_SIZE];
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};
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struct chcr_authenc_ctx {
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u8 dec_rrkey[AES_MAX_KEY_SIZE];
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u8 h_iopad[2 * CHCR_HASH_MAX_DIGEST_SIZE];
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unsigned char auth_mode;
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};
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struct __aead_ctx {
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struct chcr_gcm_ctx gcm[0];
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struct chcr_authenc_ctx authenc[0];
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};
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struct chcr_aead_ctx {
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__be32 key_ctx_hdr;
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unsigned int enckey_len;
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struct crypto_aead *sw_cipher;
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u8 salt[MAX_SALT];
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u8 key[CHCR_AES_MAX_KEY_LEN];
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u8 nonce[4];
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u16 hmac_ctrl;
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u16 mayverify;
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struct __aead_ctx ctx[0];
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};
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struct hmac_ctx {
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struct crypto_shash *base_hash;
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u8 ipad[CHCR_HASH_MAX_BLOCK_SIZE_128];
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u8 opad[CHCR_HASH_MAX_BLOCK_SIZE_128];
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};
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struct __crypto_ctx {
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struct hmac_ctx hmacctx[0];
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struct ablk_ctx ablkctx[0];
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struct chcr_aead_ctx aeadctx[0];
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};
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struct chcr_context {
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struct chcr_dev *dev;
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unsigned char tx_qidx;
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unsigned char rx_qidx;
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unsigned char tx_chan_id;
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unsigned char pci_chan_id;
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struct __crypto_ctx crypto_ctx[0];
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};
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struct chcr_hctx_per_wr {
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struct scatterlist *srcsg;
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struct sk_buff *skb;
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dma_addr_t dma_addr;
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u32 dma_len;
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unsigned int src_ofst;
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unsigned int processed;
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u32 result;
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u8 is_sg_map;
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u8 imm;
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/*Final callback called. Driver cannot rely on nbytes to decide
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* final call
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*/
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u8 isfinal;
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};
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struct chcr_ahash_req_ctx {
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struct chcr_hctx_per_wr hctx_wr;
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u8 *reqbfr;
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u8 *skbfr;
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/* SKB which is being sent to the hardware for processing */
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u64 data_len; /* Data len till time */
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u8 reqlen;
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u8 partial_hash[CHCR_HASH_MAX_DIGEST_SIZE];
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u8 bfr1[CHCR_HASH_MAX_BLOCK_SIZE_128];
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u8 bfr2[CHCR_HASH_MAX_BLOCK_SIZE_128];
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};
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struct chcr_skcipher_req_ctx {
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struct sk_buff *skb;
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struct scatterlist *dstsg;
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unsigned int processed;
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unsigned int last_req_len;
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struct scatterlist *srcsg;
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unsigned int src_ofst;
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unsigned int dst_ofst;
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unsigned int op;
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u16 imm;
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u8 iv[CHCR_MAX_CRYPTO_IV_LEN];
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};
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struct chcr_alg_template {
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u32 type;
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u32 is_registered;
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union {
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struct skcipher_alg skcipher;
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struct ahash_alg hash;
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struct aead_alg aead;
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} alg;
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};
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typedef struct sk_buff *(*create_wr_t)(struct aead_request *req,
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unsigned short qid,
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int size);
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void chcr_verify_tag(struct aead_request *req, u8 *input, int *err);
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int chcr_aead_dma_map(struct device *dev, struct aead_request *req,
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unsigned short op_type);
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void chcr_aead_dma_unmap(struct device *dev, struct aead_request *req,
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unsigned short op_type);
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void chcr_add_aead_dst_ent(struct aead_request *req,
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struct cpl_rx_phys_dsgl *phys_cpl,
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unsigned short qid);
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void chcr_add_aead_src_ent(struct aead_request *req, struct ulptx_sgl *ulptx);
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void chcr_add_cipher_src_ent(struct skcipher_request *req,
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void *ulptx,
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struct cipher_wr_param *wrparam);
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int chcr_cipher_dma_map(struct device *dev, struct skcipher_request *req);
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void chcr_cipher_dma_unmap(struct device *dev, struct skcipher_request *req);
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void chcr_add_cipher_dst_ent(struct skcipher_request *req,
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struct cpl_rx_phys_dsgl *phys_cpl,
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struct cipher_wr_param *wrparam,
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unsigned short qid);
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int sg_nents_len_skip(struct scatterlist *sg, u64 len, u64 skip);
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void chcr_add_hash_src_ent(struct ahash_request *req, struct ulptx_sgl *ulptx,
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struct hash_wr_param *param);
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int chcr_hash_dma_map(struct device *dev, struct ahash_request *req);
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void chcr_hash_dma_unmap(struct device *dev, struct ahash_request *req);
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void chcr_aead_common_exit(struct aead_request *req);
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#endif /* __CHCR_CRYPTO_H__ */
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