[net-next-2.6.git] / drivers / crypto / amcc / crypto4xx_alg.c

/**
 * 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"

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;
}

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);
}
Commit	Line	Data
049359d6 JH	1	/**
	2	* AMCC SoC PPC4xx Crypto Driver
	3	*
	4	* Copyright (c) 2008 Applied Micro Circuits Corporation.
	5	* All rights reserved. James Hsiao <jhsiao@amcc.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* This file implements the Linux crypto algorithms.
	18	*/
	19
	20	#include <linux/kernel.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/spinlock_types.h>
	23	#include <linux/scatterlist.h>
	24	#include <linux/crypto.h>
	25	#include <linux/hash.h>
	26	#include <crypto/internal/hash.h>
	27	#include <linux/dma-mapping.h>
	28	#include <crypto/algapi.h>
	29	#include <crypto/aes.h>
	30	#include <crypto/sha.h>
	31	#include "crypto4xx_reg_def.h"
	32	#include "crypto4xx_sa.h"
	33	#include "crypto4xx_core.h"
	34
	35	void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h,
	36	u32 save_iv, u32 ld_h, u32 ld_iv, u32 hdr_proc,
	37	u32 h, u32 c, u32 pad_type, u32 op_grp, u32 op,
	38	u32 dir)
	39	{
	40	sa->sa_command_0.w = 0;
	41	sa->sa_command_0.bf.save_hash_state = save_h;
	42	sa->sa_command_0.bf.save_iv = save_iv;
	43	sa->sa_command_0.bf.load_hash_state = ld_h;
	44	sa->sa_command_0.bf.load_iv = ld_iv;
	45	sa->sa_command_0.bf.hdr_proc = hdr_proc;
	46	sa->sa_command_0.bf.hash_alg = h;
	47	sa->sa_command_0.bf.cipher_alg = c;
	48	sa->sa_command_0.bf.pad_type = pad_type & 3;
	49	sa->sa_command_0.bf.extend_pad = pad_type >> 2;
	50	sa->sa_command_0.bf.op_group = op_grp;
	51	sa->sa_command_0.bf.opcode = op;
	52	sa->sa_command_0.bf.dir = dir;
	53	}
	54
	55	void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm, u32 hmac_mc,
	56	u32 cfb, u32 esn, u32 sn_mask, u32 mute,
	57	u32 cp_pad, u32 cp_pay, u32 cp_hdr)
	58	{
	59	sa->sa_command_1.w = 0;
	60	sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2;
	61	sa->sa_command_1.bf.crypto_mode9_8 = cm & 3;
	62	sa->sa_command_1.bf.feedback_mode = cfb,
	63	sa->sa_command_1.bf.sa_rev = 1;
	64	sa->sa_command_1.bf.extended_seq_num = esn;
65	sa->sa_command_1.bf.seq_num_mask = sn_mask;
66	sa->sa_command_1.bf.mutable_bit_proc = mute;
67	sa->sa_command_1.bf.copy_pad = cp_pad;
68	sa->sa_command_1.bf.copy_payload = cp_pay;
69	sa->sa_command_1.bf.copy_hdr = cp_hdr;
70	}
71
72	int crypto4xx_encrypt(struct ablkcipher_request *req)
73	{
74	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
75
76	ctx->direction = DIR_OUTBOUND;
77	ctx->hash_final = 0;
78	ctx->is_hash = 0;
79	ctx->pd_ctl = 0x1;
80
81	return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
82	req->nbytes, req->info,
83	get_dynamic_sa_iv_size(ctx));
84	}
85
86	int crypto4xx_decrypt(struct ablkcipher_request *req)
87	{
88	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
89
90	ctx->direction = DIR_INBOUND;
91	ctx->hash_final = 0;
92	ctx->is_hash = 0;
93	ctx->pd_ctl = 1;
94
95	return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
96	req->nbytes, req->info,
97	get_dynamic_sa_iv_size(ctx));
98	}
99
100	/**
101	* AES Functions
102	*/
103	static int crypto4xx_setkey_aes(struct crypto_ablkcipher *cipher,
104	const u8 *key,
105	unsigned int keylen,
106	unsigned char cm,
107	u8 fb)
108	{
109	struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
110	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
111	struct dynamic_sa_ctl *sa;
112	int rc;
113
114	if (keylen != AES_KEYSIZE_256 &&
115	keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) {
116	crypto_ablkcipher_set_flags(cipher,
117	CRYPTO_TFM_RES_BAD_KEY_LEN);
118	return -EINVAL;
119	}
120
121	/* Create SA */
122	if (ctx->sa_in_dma_addr \|\| ctx->sa_out_dma_addr)
123	crypto4xx_free_sa(ctx);
124
125	rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4);
126	if (rc)
127	return rc;
128
129	if (ctx->state_record_dma_addr == 0) {
130	rc = crypto4xx_alloc_state_record(ctx);
131	if (rc) {
132	crypto4xx_free_sa(ctx);
133	return rc;
134	}
135	}
136	/* Setup SA */
137	sa = (struct dynamic_sa_ctl *) ctx->sa_in;
138	ctx->hash_final = 0;
139
140	set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, SA_NOT_SAVE_IV,
141	SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
142	SA_NO_HEADER_PROC, SA_HASH_ALG_NULL,
143	SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
144	SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT,
145	DIR_INBOUND);
146
147	set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH,
148	fb, SA_EXTENDED_SN_OFF,
149	SA_SEQ_MASK_OFF, SA_MC_ENABLE,
150	SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
151	SA_NOT_COPY_HDR);
152	crypto4xx_memcpy_le(ctx->sa_in + get_dynamic_sa_offset_key_field(ctx),
153	key, keylen);
154	sa->sa_contents = SA_AES_CONTENTS \| (keylen << 2);
155	sa->sa_command_1.bf.key_len = keylen >> 3;
156	ctx->is_hash = 0;
157	ctx->direction = DIR_INBOUND;
158	memcpy(ctx->sa_in + get_dynamic_sa_offset_state_ptr_field(ctx),
159	(void *)&ctx->state_record_dma_addr, 4);
160	ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx);
161
162	memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
163	sa = (struct dynamic_sa_ctl *) ctx->sa_out;
164	sa->sa_command_0.bf.dir = DIR_OUTBOUND;
165
166	return 0;
167	}
168
169	int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher,
170	const u8 *key, unsigned int keylen)
171	{
172	return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC,
173	CRYPTO_FEEDBACK_MODE_NO_FB);
174	}
175
176	/**
177	* HASH SHA1 Functions
178	*/
179	static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm,
180	unsigned int sa_len,
181	unsigned char ha,
182	unsigned char hm)
183	{
184	struct crypto_alg *alg = tfm->__crt_alg;
185	struct crypto4xx_alg *my_alg = crypto_alg_to_crypto4xx_alg(alg);
186	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
187	struct dynamic_sa_ctl *sa;
188	struct dynamic_sa_hash160 *sa_in;
189	int rc;
190
191	ctx->dev = my_alg->dev;
192	ctx->is_hash = 1;
193	ctx->hash_final = 0;
194
195	/* Create SA */
196	if (ctx->sa_in_dma_addr \|\| ctx->sa_out_dma_addr)
197	crypto4xx_free_sa(ctx);
198
199	rc = crypto4xx_alloc_sa(ctx, sa_len);
200	if (rc)
201	return rc;
202
203	if (ctx->state_record_dma_addr == 0) {
204	crypto4xx_alloc_state_record(ctx);
205	if (!ctx->state_record_dma_addr) {
206	crypto4xx_free_sa(ctx);
207	return -ENOMEM;
208	}
209	}
210
6b1679f4 HX	211	crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
6b1679f4 HX	212	sizeof(struct crypto4xx_ctx));
049359d6 JH	213	sa = (struct dynamic_sa_ctl *) ctx->sa_in;
	214	set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
	215	SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
	216	SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL,
	217	SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
	218	SA_OPCODE_HASH, DIR_INBOUND);
	219	set_dynamic_sa_command_1(sa, 0, SA_HASH_MODE_HASH,
	220	CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
	221	SA_SEQ_MASK_OFF, SA_MC_ENABLE,
	222	SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
	223	SA_NOT_COPY_HDR);
	224	ctx->direction = DIR_INBOUND;
	225	sa->sa_contents = SA_HASH160_CONTENTS;
	226	sa_in = (struct dynamic_sa_hash160 *) ctx->sa_in;
	227	/* Need to zero hash digest in SA */
	228	memset(sa_in->inner_digest, 0, sizeof(sa_in->inner_digest));
	229	memset(sa_in->outer_digest, 0, sizeof(sa_in->outer_digest));
	230	sa_in->state_ptr = ctx->state_record_dma_addr;
	231	ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx);
	232
	233	return 0;
	234	}
	235
	236	int crypto4xx_hash_init(struct ahash_request *req)
	237	{
	238	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
	239	int ds;
	240	struct dynamic_sa_ctl *sa;
	241
	242	sa = (struct dynamic_sa_ctl *) ctx->sa_in;
	243	ds = crypto_ahash_digestsize(
	244	__crypto_ahash_cast(req->base.tfm));
	245	sa->sa_command_0.bf.digest_len = ds >> 2;
	246	sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA;
	247	ctx->is_hash = 1;
	248	ctx->direction = DIR_INBOUND;
	249
	250	return 0;
	251	}
	252
	253	int crypto4xx_hash_update(struct ahash_request *req)
	254	{
	255	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
	256
	257	ctx->is_hash = 1;
	258	ctx->hash_final = 0;
	259	ctx->pd_ctl = 0x11;
	260	ctx->direction = DIR_INBOUND;
	261
	262	return crypto4xx_build_pd(&req->base, ctx, req->src,
	263	(struct scatterlist *) req->result,
	264	req->nbytes, NULL, 0);
	265	}
	266
	267	int crypto4xx_hash_final(struct ahash_request *req)
	268	{
	269	return 0;
	270	}
	271
	272	int crypto4xx_hash_digest(struct ahash_request *req)
	273	{
	274	struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
	275
	276	ctx->hash_final = 1;
277	ctx->pd_ctl = 0x11;
278	ctx->direction = DIR_INBOUND;
279
280	return crypto4xx_build_pd(&req->base, ctx, req->src,
281	(struct scatterlist *) req->result,
282	req->nbytes, NULL, 0);
283	}
284
285	/**
286	* SHA1 Algorithm
287	*/
288	int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm)
289	{
290	return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1,
291	SA_HASH_MODE_HASH);
292	}
293
294