From: =?UTF-8?q?Horia=20Geant=C4=83?= Subject: [PATCH 09/11] crypto: caam - export ahash shared descriptor generation Date: Mon, 10 Sep 2018 20:15:48 +0300 Message-ID: <20180910171550.5659-10-horia.geanta@nxp.com> References: <20180910171550.5659-1-horia.geanta@nxp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: "David S . Miller" , Aymen Sghaier , linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org To: Herbert Xu , Stuart Yoder , Laurentiu Tudor , Li Yang , Roy Pledge , Catalin Marinas , Will Deacon Return-path: In-Reply-To: <20180910171550.5659-1-horia.geanta@nxp.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org caam/qi2 driver will support ahash algorithms, thus move ahash descriptors generation in a shared location. Signed-off-by: Horia Geantă --- drivers/crypto/caam/Kconfig | 3 ++ drivers/crypto/caam/Makefile | 1 + drivers/crypto/caam/caamhash.c | 79 +++++------------------------------- drivers/crypto/caam/caamhash_desc.c | 80 +++++++++++++++++++++++++++++++++++++ drivers/crypto/caam/caamhash_desc.h | 21 ++++++++++ 5 files changed, 114 insertions(+), 70 deletions(-) create mode 100644 drivers/crypto/caam/caamhash_desc.c create mode 100644 drivers/crypto/caam/caamhash_desc.h diff --git a/drivers/crypto/caam/Kconfig b/drivers/crypto/caam/Kconfig index 8d162cb34591..03c1db0239ae 100644 --- a/drivers/crypto/caam/Kconfig +++ b/drivers/crypto/caam/Kconfig @@ -172,3 +172,6 @@ config CRYPTO_DEV_FSL_CAAM_CRYPTO_API_DESC def_tristate (CRYPTO_DEV_FSL_CAAM_CRYPTO_API || \ CRYPTO_DEV_FSL_CAAM_CRYPTO_API_QI || \ CRYPTO_DEV_FSL_DPAA2_CAAM) + +config CRYPTO_DEV_FSL_CAAM_AHASH_API_DESC + def_tristate (CRYPTO_DEV_FSL_CAAM_AHASH_API) diff --git a/drivers/crypto/caam/Makefile b/drivers/crypto/caam/Makefile index fd507bab1828..7bbfd06a11ff 100644 --- a/drivers/crypto/caam/Makefile +++ b/drivers/crypto/caam/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API) += caamalg.o obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_QI) += caamalg_qi.o obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_DESC) += caamalg_desc.o obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API) += caamhash.o +obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API_DESC) += caamhash_desc.o obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_RNG_API) += caamrng.o obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_PKC_API) += caam_pkc.o diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index 43975ab5f09c..4c30bb5516d6 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -62,6 +62,7 @@ #include "error.h" #include "sg_sw_sec4.h" #include "key_gen.h" +#include "caamhash_desc.h" #define CAAM_CRA_PRIORITY 3000 @@ -71,14 +72,6 @@ #define CAAM_MAX_HASH_BLOCK_SIZE SHA512_BLOCK_SIZE #define CAAM_MAX_HASH_DIGEST_SIZE SHA512_DIGEST_SIZE -/* 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_FINUP_LEN (DESC_AHASH_BASE + 5 * CAAM_CMD_SZ) -#define DESC_AHASH_DIGEST_LEN (DESC_AHASH_BASE + 4 * CAAM_CMD_SZ) - #define DESC_HASH_MAX_USED_BYTES (DESC_AHASH_FINAL_LEN + \ CAAM_MAX_HASH_KEY_SIZE) #define DESC_HASH_MAX_USED_LEN (DESC_HASH_MAX_USED_BYTES / CAAM_CMD_SZ) @@ -235,60 +228,6 @@ static inline int ctx_map_to_sec4_sg(struct device *jrdev, return 0; } -/* - * For ahash update, final and finup (import_ctx = true) - * import context, read and write to seqout - * For ahash firsts and digest (import_ctx = false) - * read and write to seqout - */ -static inline void ahash_gen_sh_desc(u32 *desc, u32 state, int digestsize, - struct caam_hash_ctx *ctx, bool import_ctx, - int era) -{ - u32 op = ctx->adata.algtype; - u32 *skip_key_load; - - init_sh_desc(desc, HDR_SHARE_SERIAL); - - /* Append key if it has been set; ahash update excluded */ - if ((state != OP_ALG_AS_UPDATE) && (ctx->adata.keylen)) { - /* Skip key loading if already shared */ - skip_key_load = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | - JUMP_COND_SHRD); - - if (era < 6) - append_key_as_imm(desc, ctx->key, ctx->adata.keylen_pad, - ctx->adata.keylen, CLASS_2 | - KEY_DEST_MDHA_SPLIT | KEY_ENC); - else - append_proto_dkp(desc, &ctx->adata); - - set_jump_tgt_here(desc, skip_key_load); - - op |= OP_ALG_AAI_HMAC_PRECOMP; - } - - /* If needed, import context from software */ - if (import_ctx) - append_seq_load(desc, ctx->ctx_len, LDST_CLASS_2_CCB | - LDST_SRCDST_BYTE_CONTEXT); - - /* Class 2 operation */ - append_operation(desc, op | state | OP_ALG_ENCRYPT); - - /* - * 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); -} - static int ahash_set_sh_desc(struct crypto_ahash *ahash) { struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash); @@ -301,8 +240,8 @@ static int ahash_set_sh_desc(struct crypto_ahash *ahash) /* ahash_update shared descriptor */ desc = ctx->sh_desc_update; - ahash_gen_sh_desc(desc, OP_ALG_AS_UPDATE, ctx->ctx_len, ctx, true, - ctrlpriv->era); + cnstr_shdsc_ahash(desc, &ctx->adata, OP_ALG_AS_UPDATE, ctx->ctx_len, + ctx->ctx_len, true, ctrlpriv->era); dma_sync_single_for_device(jrdev, ctx->sh_desc_update_dma, desc_bytes(desc), ctx->dir); #ifdef DEBUG @@ -313,8 +252,8 @@ static int ahash_set_sh_desc(struct crypto_ahash *ahash) /* ahash_update_first shared descriptor */ desc = ctx->sh_desc_update_first; - ahash_gen_sh_desc(desc, OP_ALG_AS_INIT, ctx->ctx_len, ctx, false, - ctrlpriv->era); + cnstr_shdsc_ahash(desc, &ctx->adata, OP_ALG_AS_INIT, ctx->ctx_len, + ctx->ctx_len, false, ctrlpriv->era); dma_sync_single_for_device(jrdev, ctx->sh_desc_update_first_dma, desc_bytes(desc), ctx->dir); #ifdef DEBUG @@ -325,8 +264,8 @@ static int ahash_set_sh_desc(struct crypto_ahash *ahash) /* ahash_final shared descriptor */ desc = ctx->sh_desc_fin; - ahash_gen_sh_desc(desc, OP_ALG_AS_FINALIZE, digestsize, ctx, true, - ctrlpriv->era); + cnstr_shdsc_ahash(desc, &ctx->adata, OP_ALG_AS_FINALIZE, digestsize, + ctx->ctx_len, true, ctrlpriv->era); dma_sync_single_for_device(jrdev, ctx->sh_desc_fin_dma, desc_bytes(desc), ctx->dir); #ifdef DEBUG @@ -337,8 +276,8 @@ static int ahash_set_sh_desc(struct crypto_ahash *ahash) /* ahash_digest shared descriptor */ desc = ctx->sh_desc_digest; - ahash_gen_sh_desc(desc, OP_ALG_AS_INITFINAL, digestsize, ctx, false, - ctrlpriv->era); + cnstr_shdsc_ahash(desc, &ctx->adata, OP_ALG_AS_INITFINAL, digestsize, + ctx->ctx_len, false, ctrlpriv->era); dma_sync_single_for_device(jrdev, ctx->sh_desc_digest_dma, desc_bytes(desc), ctx->dir); #ifdef DEBUG diff --git a/drivers/crypto/caam/caamhash_desc.c b/drivers/crypto/caam/caamhash_desc.c new file mode 100644 index 000000000000..a12f7959a2c3 --- /dev/null +++ b/drivers/crypto/caam/caamhash_desc.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) +/* + * Shared descriptors for ahash algorithms + * + * Copyright 2017 NXP + */ + +#include "compat.h" +#include "desc_constr.h" +#include "caamhash_desc.h" + +/** + * 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; + + init_sh_desc(desc, HDR_SHARE_SERIAL); + + /* Append key if it has been set; ahash update excluded */ + if (state != OP_ALG_AS_UPDATE && adata->keylen) { + u32 *skip_key_load; + + /* Skip key loading if already shared */ + skip_key_load = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | + JUMP_COND_SHRD); + + 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); + + set_jump_tgt_here(desc, skip_key_load); + + op |= OP_ALG_AAI_HMAC_PRECOMP; + } + + /* If needed, import context from software */ + if (import_ctx) + append_seq_load(desc, ctx_len, LDST_CLASS_2_CCB | + LDST_SRCDST_BYTE_CONTEXT); + + /* Class 2 operation */ + append_operation(desc, op | state | OP_ALG_ENCRYPT); + + /* + * 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); + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DESCRIPTION("FSL CAAM ahash descriptors support"); +MODULE_AUTHOR("NXP Semiconductors"); diff --git a/drivers/crypto/caam/caamhash_desc.h b/drivers/crypto/caam/caamhash_desc.h new file mode 100644 index 000000000000..631fc1ac312c --- /dev/null +++ b/drivers/crypto/caam/caamhash_desc.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */ +/* + * Shared descriptors for ahash algorithms + * + * Copyright 2017 NXP + */ + +#ifndef _CAAMHASH_DESC_H_ +#define _CAAMHASH_DESC_H_ + +/* 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) + +void cnstr_shdsc_ahash(u32 * const desc, struct alginfo *adata, u32 state, + int digestsize, int ctx_len, bool import_ctx, int era); + +#endif /* _CAAMHASH_DESC_H_ */ -- 2.16.2