diff options
Diffstat (limited to 'kernel/drivers/crypto/amcc/crypto4xx_alg.c')
| -rw-r--r-- | kernel/drivers/crypto/amcc/crypto4xx_alg.c | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/kernel/drivers/crypto/amcc/crypto4xx_alg.c b/kernel/drivers/crypto/amcc/crypto4xx_alg.c new file mode 100644 index 000000000..4afca3968 --- /dev/null +++ b/kernel/drivers/crypto/amcc/crypto4xx_alg.c @@ -0,0 +1,295 @@ +/** + * AMCC SoC PPC4xx Crypto Driver + * + * Copyright (c) 2008 Applied Micro Circuits Corporation. + * All rights reserved. James Hsiao <jhsiao@amcc.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * This file implements the Linux crypto algorithms. + */ + +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/spinlock_types.h> +#include <linux/scatterlist.h> +#include <linux/crypto.h> +#include <linux/hash.h> +#include <crypto/internal/hash.h> +#include <linux/dma-mapping.h> +#include <crypto/algapi.h> +#include <crypto/aes.h> +#include <crypto/sha.h> +#include "crypto4xx_reg_def.h" +#include "crypto4xx_sa.h" +#include "crypto4xx_core.h" + +static void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h, + u32 save_iv, u32 ld_h, u32 ld_iv, + u32 hdr_proc, u32 h, u32 c, u32 pad_type, + u32 op_grp, u32 op, u32 dir) +{ + sa->sa_command_0.w = 0; + sa->sa_command_0.bf.save_hash_state = save_h; + sa->sa_command_0.bf.save_iv = save_iv; + sa->sa_command_0.bf.load_hash_state = ld_h; + sa->sa_command_0.bf.load_iv = ld_iv; + sa->sa_command_0.bf.hdr_proc = hdr_proc; + sa->sa_command_0.bf.hash_alg = h; + sa->sa_command_0.bf.cipher_alg = c; + sa->sa_command_0.bf.pad_type = pad_type & 3; + sa->sa_command_0.bf.extend_pad = pad_type >> 2; + sa->sa_command_0.bf.op_group = op_grp; + sa->sa_command_0.bf.opcode = op; + sa->sa_command_0.bf.dir = dir; +} + +static void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm, + u32 hmac_mc, u32 cfb, u32 esn, + u32 sn_mask, u32 mute, u32 cp_pad, + u32 cp_pay, u32 cp_hdr) +{ + sa->sa_command_1.w = 0; + sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2; + sa->sa_command_1.bf.crypto_mode9_8 = cm & 3; + sa->sa_command_1.bf.feedback_mode = cfb, + sa->sa_command_1.bf.sa_rev = 1; + sa->sa_command_1.bf.extended_seq_num = esn; + sa->sa_command_1.bf.seq_num_mask = sn_mask; + sa->sa_command_1.bf.mutable_bit_proc = mute; + sa->sa_command_1.bf.copy_pad = cp_pad; + sa->sa_command_1.bf.copy_payload = cp_pay; + sa->sa_command_1.bf.copy_hdr = cp_hdr; +} + +int crypto4xx_encrypt(struct ablkcipher_request *req) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + + ctx->direction = DIR_OUTBOUND; + ctx->hash_final = 0; + ctx->is_hash = 0; + ctx->pd_ctl = 0x1; + + return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, + req->nbytes, req->info, + get_dynamic_sa_iv_size(ctx)); +} + +int crypto4xx_decrypt(struct ablkcipher_request *req) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + + ctx->direction = DIR_INBOUND; + ctx->hash_final = 0; + ctx->is_hash = 0; + ctx->pd_ctl = 1; + + return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, + req->nbytes, req->info, + get_dynamic_sa_iv_size(ctx)); +} + +/** + * AES Functions + */ +static int crypto4xx_setkey_aes(struct crypto_ablkcipher *cipher, + const u8 *key, + unsigned int keylen, + unsigned char cm, + u8 fb) +{ + struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); + struct dynamic_sa_ctl *sa; + int rc; + + if (keylen != AES_KEYSIZE_256 && + keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) { + crypto_ablkcipher_set_flags(cipher, + CRYPTO_TFM_RES_BAD_KEY_LEN); + return -EINVAL; + } + + /* Create SA */ + if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr) + crypto4xx_free_sa(ctx); + + rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4); + if (rc) + return rc; + + if (ctx->state_record_dma_addr == 0) { + rc = crypto4xx_alloc_state_record(ctx); + if (rc) { + crypto4xx_free_sa(ctx); + return rc; + } + } + /* Setup SA */ + sa = (struct dynamic_sa_ctl *) ctx->sa_in; + ctx->hash_final = 0; + + set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, SA_NOT_SAVE_IV, + SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE, + SA_NO_HEADER_PROC, SA_HASH_ALG_NULL, + SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO, + SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT, + DIR_INBOUND); + + set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH, + fb, SA_EXTENDED_SN_OFF, + SA_SEQ_MASK_OFF, SA_MC_ENABLE, + SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD, + SA_NOT_COPY_HDR); + crypto4xx_memcpy_le(ctx->sa_in + get_dynamic_sa_offset_key_field(ctx), + key, keylen); + sa->sa_contents = SA_AES_CONTENTS | (keylen << 2); + sa->sa_command_1.bf.key_len = keylen >> 3; + ctx->is_hash = 0; + ctx->direction = DIR_INBOUND; + memcpy(ctx->sa_in + get_dynamic_sa_offset_state_ptr_field(ctx), + (void *)&ctx->state_record_dma_addr, 4); + ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx); + + memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4); + sa = (struct dynamic_sa_ctl *) ctx->sa_out; + sa->sa_command_0.bf.dir = DIR_OUTBOUND; + + return 0; +} + +int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher, + const u8 *key, unsigned int keylen) +{ + return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC, + CRYPTO_FEEDBACK_MODE_NO_FB); +} + +/** + * HASH SHA1 Functions + */ +static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm, + unsigned int sa_len, + unsigned char ha, + unsigned char hm) +{ + struct crypto_alg *alg = tfm->__crt_alg; + struct crypto4xx_alg *my_alg = crypto_alg_to_crypto4xx_alg(alg); + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); + struct dynamic_sa_ctl *sa; + struct dynamic_sa_hash160 *sa_in; + int rc; + + ctx->dev = my_alg->dev; + ctx->is_hash = 1; + ctx->hash_final = 0; + + /* Create SA */ + if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr) + crypto4xx_free_sa(ctx); + + rc = crypto4xx_alloc_sa(ctx, sa_len); + if (rc) + return rc; + + if (ctx->state_record_dma_addr == 0) { + crypto4xx_alloc_state_record(ctx); + if (!ctx->state_record_dma_addr) { + crypto4xx_free_sa(ctx); + return -ENOMEM; + } + } + + crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), + sizeof(struct crypto4xx_ctx)); + sa = (struct dynamic_sa_ctl *) ctx->sa_in; + set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV, + SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA, + SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL, + SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC, + SA_OPCODE_HASH, DIR_INBOUND); + set_dynamic_sa_command_1(sa, 0, SA_HASH_MODE_HASH, + CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, + SA_SEQ_MASK_OFF, SA_MC_ENABLE, + SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD, + SA_NOT_COPY_HDR); + ctx->direction = DIR_INBOUND; + sa->sa_contents = SA_HASH160_CONTENTS; + sa_in = (struct dynamic_sa_hash160 *) ctx->sa_in; + /* Need to zero hash digest in SA */ + memset(sa_in->inner_digest, 0, sizeof(sa_in->inner_digest)); + memset(sa_in->outer_digest, 0, sizeof(sa_in->outer_digest)); + sa_in->state_ptr = ctx->state_record_dma_addr; + ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx); + + return 0; +} + +int crypto4xx_hash_init(struct ahash_request *req) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + int ds; + struct dynamic_sa_ctl *sa; + + sa = (struct dynamic_sa_ctl *) ctx->sa_in; + ds = crypto_ahash_digestsize( + __crypto_ahash_cast(req->base.tfm)); + sa->sa_command_0.bf.digest_len = ds >> 2; + sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA; + ctx->is_hash = 1; + ctx->direction = DIR_INBOUND; + + return 0; +} + +int crypto4xx_hash_update(struct ahash_request *req) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + + ctx->is_hash = 1; + ctx->hash_final = 0; + ctx->pd_ctl = 0x11; + ctx->direction = DIR_INBOUND; + + return crypto4xx_build_pd(&req->base, ctx, req->src, + (struct scatterlist *) req->result, + req->nbytes, NULL, 0); +} + +int crypto4xx_hash_final(struct ahash_request *req) +{ + return 0; +} + +int crypto4xx_hash_digest(struct ahash_request *req) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + + ctx->hash_final = 1; + ctx->pd_ctl = 0x11; + ctx->direction = DIR_INBOUND; + + return crypto4xx_build_pd(&req->base, ctx, req->src, + (struct scatterlist *) req->result, + req->nbytes, NULL, 0); +} + +/** + * SHA1 Algorithm + */ +int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm) +{ + return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1, + SA_HASH_MODE_HASH); +} + + |