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crypto: caam - export ahash shared descriptor generation
caam/qi2 driver will support ahash algorithms, thus move ahash descriptors generation in a shared location. Signed-off-by: Horia Geantă <horia.geanta@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Horia Geantă
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Herbert Xu
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Sep 21, 2018
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) | ||
| /* | ||
| * Shared descriptors for ahash algorithms | ||
| * | ||
| * Copyright 2017 NXP | ||
| */ | ||
|
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| #include "compat.h" | ||
| #include "desc_constr.h" | ||
| #include "caamhash_desc.h" | ||
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| /** | ||
| * cnstr_shdsc_ahash - ahash shared descriptor | ||
| * @desc: pointer to buffer used for descriptor construction | ||
| * @adata: pointer to authentication transform definitions. | ||
| * A split key is required for SEC Era < 6; the size of the split key | ||
| * is specified in this case. | ||
| * Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1, SHA224, | ||
| * SHA256, SHA384, SHA512}. | ||
| * @state: algorithm state OP_ALG_AS_{INIT, FINALIZE, INITFINALIZE, UPDATE} | ||
| * @digestsize: algorithm's digest size | ||
| * @ctx_len: size of Context Register | ||
| * @import_ctx: true if previous Context Register needs to be restored | ||
| * must be true for ahash update and final | ||
| * must be false for for ahash first and digest | ||
| * @era: SEC Era | ||
| */ | ||
| void cnstr_shdsc_ahash(u32 * const desc, struct alginfo *adata, u32 state, | ||
| int digestsize, int ctx_len, bool import_ctx, int era) | ||
| { | ||
| u32 op = adata->algtype; | ||
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| init_sh_desc(desc, HDR_SHARE_SERIAL); | ||
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| /* Append key if it has been set; ahash update excluded */ | ||
| if (state != OP_ALG_AS_UPDATE && adata->keylen) { | ||
| u32 *skip_key_load; | ||
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| /* Skip key loading if already shared */ | ||
| skip_key_load = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | | ||
| JUMP_COND_SHRD); | ||
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| if (era < 6) | ||
| append_key_as_imm(desc, adata->key_virt, | ||
| adata->keylen_pad, | ||
| adata->keylen, CLASS_2 | | ||
| KEY_DEST_MDHA_SPLIT | KEY_ENC); | ||
| else | ||
| append_proto_dkp(desc, adata); | ||
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| set_jump_tgt_here(desc, skip_key_load); | ||
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| op |= OP_ALG_AAI_HMAC_PRECOMP; | ||
| } | ||
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| /* If needed, import context from software */ | ||
| if (import_ctx) | ||
| append_seq_load(desc, ctx_len, LDST_CLASS_2_CCB | | ||
| LDST_SRCDST_BYTE_CONTEXT); | ||
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| /* Class 2 operation */ | ||
| append_operation(desc, op | state | OP_ALG_ENCRYPT); | ||
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| /* | ||
| * Load from buf and/or src and write to req->result or state->context | ||
| * Calculate remaining bytes to read | ||
| */ | ||
| append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ); | ||
| /* Read remaining bytes */ | ||
| append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_LAST2 | | ||
| FIFOLD_TYPE_MSG | KEY_VLF); | ||
| /* Store class2 context bytes */ | ||
| append_seq_store(desc, digestsize, LDST_CLASS_2_CCB | | ||
| LDST_SRCDST_BYTE_CONTEXT); | ||
| } | ||
| EXPORT_SYMBOL(cnstr_shdsc_ahash); | ||
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| MODULE_LICENSE("Dual BSD/GPL"); | ||
| MODULE_DESCRIPTION("FSL CAAM ahash descriptors support"); | ||
| MODULE_AUTHOR("NXP Semiconductors"); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */ | ||
| /* | ||
| * Shared descriptors for ahash algorithms | ||
| * | ||
| * Copyright 2017 NXP | ||
| */ | ||
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| #ifndef _CAAMHASH_DESC_H_ | ||
| #define _CAAMHASH_DESC_H_ | ||
|
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| /* length of descriptors text */ | ||
| #define DESC_AHASH_BASE (3 * CAAM_CMD_SZ) | ||
| #define DESC_AHASH_UPDATE_LEN (6 * CAAM_CMD_SZ) | ||
| #define DESC_AHASH_UPDATE_FIRST_LEN (DESC_AHASH_BASE + 4 * CAAM_CMD_SZ) | ||
| #define DESC_AHASH_FINAL_LEN (DESC_AHASH_BASE + 5 * CAAM_CMD_SZ) | ||
| #define DESC_AHASH_DIGEST_LEN (DESC_AHASH_BASE + 4 * CAAM_CMD_SZ) | ||
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| void cnstr_shdsc_ahash(u32 * const desc, struct alginfo *adata, u32 state, | ||
| int digestsize, int ctx_len, bool import_ctx, int era); | ||
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| #endif /* _CAAMHASH_DESC_H_ */ |