[deliverable/linux.git] / drivers / crypto / nx / nx-sha512.c

/**
 * SHA-512 routines supporting the Power 7+ Nest Accelerators driver
 *
 * Copyright (C) 2011-2012 International Business Machines Inc.
 *
 * 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; version 2 only.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Author: Kent Yoder <yoder1@us.ibm.com>
 */

#include <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <linux/module.h>
#include <asm/vio.h>

#include "nx_csbcpb.h"
#include "nx.h"


static int nx_sha512_init(struct shash_desc *desc)
{
	struct sha512_state *sctx = shash_desc_ctx(desc);
	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
	struct nx_sg *out_sg;

	nx_ctx_init(nx_ctx, HCOP_FC_SHA);

	memset(sctx, 0, sizeof *sctx);

	nx_ctx->ap = &nx_ctx->props[NX_PROPS_SHA512];

	NX_CPB_SET_DIGEST_SIZE(nx_ctx->csbcpb, NX_DS_SHA512);
	out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *)sctx->state,
				  SHA512_DIGEST_SIZE, nx_ctx->ap->sglen);
	nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);

	return 0;
}

static int nx_sha512_update(struct shash_desc *desc, const u8 *data,
			    unsigned int len)
{
	struct sha512_state *sctx = shash_desc_ctx(desc);
	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
	struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
	struct nx_sg *in_sg;
	u64 to_process, leftover, total, spbc_bits;
	u32 max_sg_len;
	unsigned long irq_flags;
	int rc = 0;

	spin_lock_irqsave(&nx_ctx->lock, irq_flags);

	/* 2 cases for total data len:
	 *  1: < SHA512_BLOCK_SIZE: copy into state, return 0
	 *  2: >= SHA512_BLOCK_SIZE: process X blocks, copy in leftover
	 */
	total = sctx->count[0] + len;
	if (total < SHA512_BLOCK_SIZE) {
		memcpy(sctx->buf + sctx->count[0], data, len);
		sctx->count[0] += len;
		goto out;
	}

	in_sg = nx_ctx->in_sg;
	max_sg_len = min_t(u32, nx_driver.of.max_sg_len/sizeof(struct nx_sg),
			   nx_ctx->ap->sglen);

	do {
		/*
		 * to_process: the SHA512_BLOCK_SIZE data chunk to process in
		 * this update. This value is also restricted by the sg list
		 * limits.
		 */
		to_process = min_t(u64, total, nx_ctx->ap->databytelen);
		to_process = min_t(u64, to_process,
				   NX_PAGE_SIZE * (max_sg_len - 1));
		to_process = to_process & ~(SHA512_BLOCK_SIZE - 1);
		leftover = total - to_process;

		if (sctx->count[0]) {
			in_sg = nx_build_sg_list(nx_ctx->in_sg,
						 (u8 *) sctx->buf,
						 sctx->count[0], max_sg_len);
		}
		in_sg = nx_build_sg_list(in_sg, (u8 *) data,
					 to_process - sctx->count[0],
					 max_sg_len);
		nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) *
					sizeof(struct nx_sg);

		if (NX_CPB_FDM(csbcpb) & NX_FDM_CONTINUATION) {
			/*
			 * we've hit the nx chip previously and we're updating
			 * again, so copy over the partial digest.
			 */
			memcpy(csbcpb->cpb.sha512.input_partial_digest,
			       csbcpb->cpb.sha512.message_digest,
			       SHA512_DIGEST_SIZE);
		}

		NX_CPB_FDM(csbcpb) |= NX_FDM_INTERMEDIATE;
		if (!nx_ctx->op.inlen || !nx_ctx->op.outlen) {
			rc = -EINVAL;
			goto out;
		}

		rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
				   desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP);
		if (rc)
			goto out;

		atomic_inc(&(nx_ctx->stats->sha512_ops));
		spbc_bits = csbcpb->cpb.sha512.spbc * 8;
		csbcpb->cpb.sha512.message_bit_length_lo += spbc_bits;
		if (csbcpb->cpb.sha512.message_bit_length_lo < spbc_bits)
			csbcpb->cpb.sha512.message_bit_length_hi++;

		/* everything after the first update is continuation */
		NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;

		total -= to_process;
		data += to_process - sctx->count[0];
		sctx->count[0] = 0;
		in_sg = nx_ctx->in_sg;
	} while (leftover >= SHA512_BLOCK_SIZE);

	/* copy the leftover back into the state struct */
	if (leftover)
		memcpy(sctx->buf, data, leftover);
	sctx->count[0] = leftover;
out:
	spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
	return rc;
}

static int nx_sha512_final(struct shash_desc *desc, u8 *out)
{
	struct sha512_state *sctx = shash_desc_ctx(desc);
	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
	struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
	struct nx_sg *in_sg, *out_sg;
	u32 max_sg_len;
	u64 count0;
	unsigned long irq_flags;
	int rc;

	spin_lock_irqsave(&nx_ctx->lock, irq_flags);

	max_sg_len = min_t(u32, nx_driver.of.max_sg_len, nx_ctx->ap->sglen);

	if (NX_CPB_FDM(csbcpb) & NX_FDM_CONTINUATION) {
		/* we've hit the nx chip previously, now we're finalizing,
		 * so copy over the partial digest */
		memcpy(csbcpb->cpb.sha512.input_partial_digest,
		       csbcpb->cpb.sha512.message_digest, SHA512_DIGEST_SIZE);
	}

	/* final is represented by continuing the operation and indicating that
	 * this is not an intermediate operation */
	NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE;

	count0 = sctx->count[0] * 8;

	csbcpb->cpb.sha512.message_bit_length_lo += count0;
	if (csbcpb->cpb.sha512.message_bit_length_lo < count0)
		csbcpb->cpb.sha512.message_bit_length_hi++;

	in_sg = nx_build_sg_list(nx_ctx->in_sg, sctx->buf, sctx->count[0],
				 max_sg_len);
	out_sg = nx_build_sg_list(nx_ctx->out_sg, out, SHA512_DIGEST_SIZE,
				  max_sg_len);
	nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg);
	nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);

	if (!nx_ctx->op.outlen) {
		rc = -EINVAL;
		goto out;
	}

	rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
			   desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP);
	if (rc)
		goto out;

	atomic_inc(&(nx_ctx->stats->sha512_ops));
	atomic64_add(csbcpb->cpb.sha512.message_bit_length_lo / 8,
		     &(nx_ctx->stats->sha512_bytes));

	memcpy(out, csbcpb->cpb.sha512.message_digest, SHA512_DIGEST_SIZE);
out:
	spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
	return rc;
}

static int nx_sha512_export(struct shash_desc *desc, void *out)
{
	struct sha512_state *sctx = shash_desc_ctx(desc);
	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
	struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
	struct sha512_state *octx = out;
	unsigned long irq_flags;

	spin_lock_irqsave(&nx_ctx->lock, irq_flags);

	/* move message_bit_length (128 bits) into count and convert its value
	 * to bytes */
	octx->count[0] = csbcpb->cpb.sha512.message_bit_length_lo >> 3 |
			 ((csbcpb->cpb.sha512.message_bit_length_hi & 7) << 61);
	octx->count[1] = csbcpb->cpb.sha512.message_bit_length_hi >> 3;

	octx->count[0] += sctx->count[0];
	if (octx->count[0] < sctx->count[0])
		octx->count[1]++;

	memcpy(octx->buf, sctx->buf, sizeof(octx->buf));

	/* if no data has been processed yet, we need to export SHA512's
	 * initial data, in case this context gets imported into a software
	 * context */
	if (csbcpb->cpb.sha512.message_bit_length_hi ||
	    csbcpb->cpb.sha512.message_bit_length_lo)
		memcpy(octx->state, csbcpb->cpb.sha512.message_digest,
		       SHA512_DIGEST_SIZE);
	else {
		octx->state[0] = SHA512_H0;
		octx->state[1] = SHA512_H1;
		octx->state[2] = SHA512_H2;
		octx->state[3] = SHA512_H3;
		octx->state[4] = SHA512_H4;
		octx->state[5] = SHA512_H5;
		octx->state[6] = SHA512_H6;
		octx->state[7] = SHA512_H7;
	}

	spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
	return 0;
}

static int nx_sha512_import(struct shash_desc *desc, const void *in)
{
	struct sha512_state *sctx = shash_desc_ctx(desc);
	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
	struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
	const struct sha512_state *ictx = in;
	unsigned long irq_flags;

	spin_lock_irqsave(&nx_ctx->lock, irq_flags);

	memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
	sctx->count[0] = ictx->count[0] & 0x3f;
	csbcpb->cpb.sha512.message_bit_length_lo = (ictx->count[0] & ~0x3f)
							<< 3;
	csbcpb->cpb.sha512.message_bit_length_hi = ictx->count[1] << 3 |
						   ictx->count[0] >> 61;

	if (csbcpb->cpb.sha512.message_bit_length_hi ||
	    csbcpb->cpb.sha512.message_bit_length_lo) {
		memcpy(csbcpb->cpb.sha512.message_digest, ictx->state,
		       SHA512_DIGEST_SIZE);

		NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
		NX_CPB_FDM(csbcpb) |= NX_FDM_INTERMEDIATE;
	}

	spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
	return 0;
}

struct shash_alg nx_shash_sha512_alg = {
	.digestsize = SHA512_DIGEST_SIZE,
	.init       = nx_sha512_init,
	.update     = nx_sha512_update,
	.final      = nx_sha512_final,
	.export     = nx_sha512_export,
	.import     = nx_sha512_import,
	.descsize   = sizeof(struct sha512_state),
	.statesize  = sizeof(struct sha512_state),
	.base       = {
		.cra_name        = "sha512",
		.cra_driver_name = "sha512-nx",
		.cra_priority    = 300,
		.cra_flags       = CRYPTO_ALG_TYPE_SHASH,
		.cra_blocksize   = SHA512_BLOCK_SIZE,
		.cra_module      = THIS_MODULE,
		.cra_ctxsize     = sizeof(struct nx_crypto_ctx),
		.cra_init        = nx_crypto_ctx_sha_init,
		.cra_exit        = nx_crypto_ctx_exit,
	}
};
Commit	Line	Data
fc482a86 KY	1	/**
	2	* SHA-512 routines supporting the Power 7+ Nest Accelerators driver
	3	*
	4	* Copyright (C) 2011-2012 International Business Machines Inc.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; version 2 only.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	18	*
	19	* Author: Kent Yoder <yoder1@us.ibm.com>
	20	*/
	21
	22	#include <crypto/internal/hash.h>
	23	#include <crypto/sha.h>
	24	#include <linux/module.h>
	25	#include <asm/vio.h>
	26
	27	#include "nx_csbcpb.h"
	28	#include "nx.h"
	29
	30
	31	static int nx_sha512_init(struct shash_desc *desc)
	32	{
	33	struct sha512_state *sctx = shash_desc_ctx(desc);
	34	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
	35	struct nx_sg *out_sg;
	36
	37	nx_ctx_init(nx_ctx, HCOP_FC_SHA);
	38
	39	memset(sctx, 0, sizeof *sctx);
	40
	41	nx_ctx->ap = &nx_ctx->props[NX_PROPS_SHA512];
	42
	43	NX_CPB_SET_DIGEST_SIZE(nx_ctx->csbcpb, NX_DS_SHA512);
	44	out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *)sctx->state,
	45	SHA512_DIGEST_SIZE, nx_ctx->ap->sglen);
	46	nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
	47
	48	return 0;
	49	}
	50
	51	static int nx_sha512_update(struct shash_desc desc, const u8 data,
	52	unsigned int len)
	53	{
	54	struct sha512_state *sctx = shash_desc_ctx(desc);
	55	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
	56	struct nx_csbcpb csbcpb = (struct nx_csbcpb )nx_ctx->csbcpb;
	57	struct nx_sg *in_sg;
d3111493 MC	58	u64 to_process, leftover, total, spbc_bits;
d3111493 MC	59	u32 max_sg_len;
c849163b	60	unsigned long irq_flags;
fc482a86 KY	61	int rc = 0;
fc482a86 KY	62
c849163b MC	63	spin_lock_irqsave(&nx_ctx->lock, irq_flags);
c849163b MC	64
fc482a86	65	/* 2 cases for total data len:
d3111493 MC	66	* 1: < SHA512_BLOCK_SIZE: copy into state, return 0
d3111493 MC	67	* 2: >= SHA512_BLOCK_SIZE: process X blocks, copy in leftover
fc482a86	68	*/
d3111493 MC	69	total = sctx->count[0] + len;
d3111493 MC	70	if (total < SHA512_BLOCK_SIZE) {
fc482a86 KY	71	memcpy(sctx->buf + sctx->count[0], data, len);
	72	sctx->count[0] += len;
	73	goto out;
	74	}
	75
d3111493 MC	76	in_sg = nx_ctx->in_sg;
	77	max_sg_len = min_t(u32, nx_driver.of.max_sg_len/sizeof(struct nx_sg),
	78	nx_ctx->ap->sglen);
	79
	80	do {
	81	/*
	82	* to_process: the SHA512_BLOCK_SIZE data chunk to process in
	83	* this update. This value is also restricted by the sg list
	84	* limits.
	85	*/
	86	to_process = min_t(u64, total, nx_ctx->ap->databytelen);
	87	to_process = min_t(u64, to_process,
	88	NX_PAGE_SIZE * (max_sg_len - 1));
	89	to_process = to_process & ~(SHA512_BLOCK_SIZE - 1);
	90	leftover = total - to_process;
	91
	92	if (sctx->count[0]) {
	93	in_sg = nx_build_sg_list(nx_ctx->in_sg,
	94	(u8 *) sctx->buf,
	95	sctx->count[0], max_sg_len);
	96	}
	97	in_sg = nx_build_sg_list(in_sg, (u8 *) data,
fc482a86	98	to_process - sctx->count[0],
d3111493	99	max_sg_len);
fc482a86 KY	100	nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) *
fc482a86 KY	101	sizeof(struct nx_sg);
fc482a86	102
d3111493 MC	103	if (NX_CPB_FDM(csbcpb) & NX_FDM_CONTINUATION) {
	104	/*
	105	* we've hit the nx chip previously and we're updating
	106	* again, so copy over the partial digest.
	107	*/
	108	memcpy(csbcpb->cpb.sha512.input_partial_digest,
	109	csbcpb->cpb.sha512.message_digest,
	110	SHA512_DIGEST_SIZE);
	111	}
	112
	113	NX_CPB_FDM(csbcpb) \|= NX_FDM_INTERMEDIATE;
	114	if (!nx_ctx->op.inlen \|\| !nx_ctx->op.outlen) {
	115	rc = -EINVAL;
	116	goto out;
	117	}
	118
	119	rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
	120	desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP);
	121	if (rc)
	122	goto out;
	123
	124	atomic_inc(&(nx_ctx->stats->sha512_ops));
	125	spbc_bits = csbcpb->cpb.sha512.spbc * 8;
	126	csbcpb->cpb.sha512.message_bit_length_lo += spbc_bits;
	127	if (csbcpb->cpb.sha512.message_bit_length_lo < spbc_bits)
	128	csbcpb->cpb.sha512.message_bit_length_hi++;
	129
	130	/* everything after the first update is continuation */
	131	NX_CPB_FDM(csbcpb) \|= NX_FDM_CONTINUATION;
	132
	133	total -= to_process;
069fa045	134	data += to_process - sctx->count[0];
d3111493 MC	135	sctx->count[0] = 0;
	136	in_sg = nx_ctx->in_sg;
	137	} while (leftover >= SHA512_BLOCK_SIZE);
fc482a86 KY	138
fc482a86 KY	139	/* copy the leftover back into the state struct */
1ad936e8	140	if (leftover)
d3111493	141	memcpy(sctx->buf, data, leftover);
fc482a86	142	sctx->count[0] = leftover;
fc482a86	143	out:
c849163b	144	spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
fc482a86 KY	145	return rc;
	146	}
	147
	148	static int nx_sha512_final(struct shash_desc desc, u8 out)
	149	{
	150	struct sha512_state *sctx = shash_desc_ctx(desc);
	151	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
	152	struct nx_csbcpb csbcpb = (struct nx_csbcpb )nx_ctx->csbcpb;
	153	struct nx_sg in_sg, out_sg;
d3111493	154	u32 max_sg_len;
fc482a86	155	u64 count0;
c849163b	156	unsigned long irq_flags;
fc482a86 KY	157	int rc;
fc482a86 KY	158
c849163b MC	159	spin_lock_irqsave(&nx_ctx->lock, irq_flags);
c849163b MC	160
d3111493 MC	161	max_sg_len = min_t(u32, nx_driver.of.max_sg_len, nx_ctx->ap->sglen);
d3111493 MC	162
fc482a86 KY	163	if (NX_CPB_FDM(csbcpb) & NX_FDM_CONTINUATION) {
	164	/* we've hit the nx chip previously, now we're finalizing,
	165	* so copy over the partial digest */
	166	memcpy(csbcpb->cpb.sha512.input_partial_digest,
	167	csbcpb->cpb.sha512.message_digest, SHA512_DIGEST_SIZE);
	168	}
	169
	170	/* final is represented by continuing the operation and indicating that
	171	* this is not an intermediate operation */
	172	NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE;
	173
	174	count0 = sctx->count[0] * 8;
	175
	176	csbcpb->cpb.sha512.message_bit_length_lo += count0;
	177	if (csbcpb->cpb.sha512.message_bit_length_lo < count0)
	178	csbcpb->cpb.sha512.message_bit_length_hi++;
	179
	180	in_sg = nx_build_sg_list(nx_ctx->in_sg, sctx->buf, sctx->count[0],
d3111493	181	max_sg_len);
fc482a86	182	out_sg = nx_build_sg_list(nx_ctx->out_sg, out, SHA512_DIGEST_SIZE,
d3111493	183	max_sg_len);
fc482a86 KY	184	nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg);
	185	nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
	186
	187	if (!nx_ctx->op.outlen) {
	188	rc = -EINVAL;
	189	goto out;
	190	}
	191
	192	rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
	193	desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP);
	194	if (rc)
	195	goto out;
	196
	197	atomic_inc(&(nx_ctx->stats->sha512_ops));
1ad936e8	198	atomic64_add(csbcpb->cpb.sha512.message_bit_length_lo / 8,
fc482a86 KY	199	&(nx_ctx->stats->sha512_bytes));
	200
	201	memcpy(out, csbcpb->cpb.sha512.message_digest, SHA512_DIGEST_SIZE);
	202	out:
c849163b	203	spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
fc482a86 KY	204	return rc;
	205	}
	206
	207	static int nx_sha512_export(struct shash_desc desc, void out)
	208	{
	209	struct sha512_state *sctx = shash_desc_ctx(desc);
	210	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
	211	struct nx_csbcpb csbcpb = (struct nx_csbcpb )nx_ctx->csbcpb;
	212	struct sha512_state *octx = out;
c849163b MC	213	unsigned long irq_flags;
	214
	215	spin_lock_irqsave(&nx_ctx->lock, irq_flags);
fc482a86 KY	216
	217	/* move message_bit_length (128 bits) into count and convert its value
	218	* to bytes */
	219	octx->count[0] = csbcpb->cpb.sha512.message_bit_length_lo >> 3 \|
	220	((csbcpb->cpb.sha512.message_bit_length_hi & 7) << 61);
	221	octx->count[1] = csbcpb->cpb.sha512.message_bit_length_hi >> 3;
	222
	223	octx->count[0] += sctx->count[0];
	224	if (octx->count[0] < sctx->count[0])
	225	octx->count[1]++;
	226
	227	memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
	228
	229	/* if no data has been processed yet, we need to export SHA512's
	230	* initial data, in case this context gets imported into a software
	231	* context */
	232	if (csbcpb->cpb.sha512.message_bit_length_hi \|\|
	233	csbcpb->cpb.sha512.message_bit_length_lo)
	234	memcpy(octx->state, csbcpb->cpb.sha512.message_digest,
	235	SHA512_DIGEST_SIZE);
	236	else {
	237	octx->state[0] = SHA512_H0;
	238	octx->state[1] = SHA512_H1;
	239	octx->state[2] = SHA512_H2;
	240	octx->state[3] = SHA512_H3;
	241	octx->state[4] = SHA512_H4;
	242	octx->state[5] = SHA512_H5;
	243	octx->state[6] = SHA512_H6;
	244	octx->state[7] = SHA512_H7;
	245	}
	246
c849163b	247	spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
fc482a86 KY	248	return 0;
	249	}
	250
	251	static int nx_sha512_import(struct shash_desc desc, const void in)
	252	{
	253	struct sha512_state *sctx = shash_desc_ctx(desc);
	254	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
	255	struct nx_csbcpb csbcpb = (struct nx_csbcpb )nx_ctx->csbcpb;
	256	const struct sha512_state *ictx = in;
c849163b MC	257	unsigned long irq_flags;
	258
	259	spin_lock_irqsave(&nx_ctx->lock, irq_flags);
fc482a86 KY	260
	261	memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
	262	sctx->count[0] = ictx->count[0] & 0x3f;
	263	csbcpb->cpb.sha512.message_bit_length_lo = (ictx->count[0] & ~0x3f)
	264	<< 3;
	265	csbcpb->cpb.sha512.message_bit_length_hi = ictx->count[1] << 3 \|
	266	ictx->count[0] >> 61;
	267
	268	if (csbcpb->cpb.sha512.message_bit_length_hi \|\|
	269	csbcpb->cpb.sha512.message_bit_length_lo) {
	270	memcpy(csbcpb->cpb.sha512.message_digest, ictx->state,
	271	SHA512_DIGEST_SIZE);
	272
	273	NX_CPB_FDM(csbcpb) \|= NX_FDM_CONTINUATION;
	274	NX_CPB_FDM(csbcpb) \|= NX_FDM_INTERMEDIATE;
	275	}
	276
c849163b	277	spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
fc482a86 KY	278	return 0;
	279	}
	280
	281	struct shash_alg nx_shash_sha512_alg = {
	282	.digestsize = SHA512_DIGEST_SIZE,
	283	.init = nx_sha512_init,
	284	.update = nx_sha512_update,
	285	.final = nx_sha512_final,
	286	.export = nx_sha512_export,
	287	.import = nx_sha512_import,
	288	.descsize = sizeof(struct sha512_state),
	289	.statesize = sizeof(struct sha512_state),
	290	.base = {
	291	.cra_name = "sha512",
	292	.cra_driver_name = "sha512-nx",
	293	.cra_priority = 300,
	294	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	295	.cra_blocksize = SHA512_BLOCK_SIZE,
	296	.cra_module = THIS_MODULE,
	297	.cra_ctxsize = sizeof(struct nx_crypto_ctx),
	298	.cra_init = nx_crypto_ctx_sha_init,
	299	.cra_exit = nx_crypto_ctx_exit,
	300	}
	301	};