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yaml --- r: 305392 b: refs/heads/master c: fc482a8 h: refs/heads/master v: v3
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Kent Yoder
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Benjamin Herrenschmidt
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May 16, 2012
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--- | ||
refs/heads/master: 528e396231addde7428e226b9e43ebcadb6c3837 | ||
refs/heads/master: fc482a86c38fc50ff30dcd8c990b19dae795beeb |
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/** | ||
* 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> | ||
*/ | ||
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#include <crypto/internal/hash.h> | ||
#include <crypto/sha.h> | ||
#include <linux/module.h> | ||
#include <asm/vio.h> | ||
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#include "nx_csbcpb.h" | ||
#include "nx.h" | ||
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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; | ||
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nx_ctx_init(nx_ctx, HCOP_FC_SHA); | ||
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memset(sctx, 0, sizeof *sctx); | ||
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nx_ctx->ap = &nx_ctx->props[NX_PROPS_SHA512]; | ||
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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); | ||
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return 0; | ||
} | ||
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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, spbc_bits; | ||
int rc = 0; | ||
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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); | ||
} | ||
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/* 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 | ||
*/ | ||
if ((u64)len + sctx->count[0] <= SHA512_BLOCK_SIZE) { | ||
memcpy(sctx->buf + sctx->count[0], data, len); | ||
sctx->count[0] += len; | ||
goto out; | ||
} | ||
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/* to_process: the SHA512_BLOCK_SIZE data chunk to process in this | ||
* update */ | ||
to_process = (sctx->count[0] + len) & ~(SHA512_BLOCK_SIZE - 1); | ||
leftover = (sctx->count[0] + len) & (SHA512_BLOCK_SIZE - 1); | ||
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if (sctx->count[0]) { | ||
in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *)sctx->buf, | ||
sctx->count[0], nx_ctx->ap->sglen); | ||
in_sg = nx_build_sg_list(in_sg, (u8 *)data, | ||
to_process - sctx->count[0], | ||
nx_ctx->ap->sglen); | ||
nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * | ||
sizeof(struct nx_sg); | ||
} else { | ||
in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *)data, | ||
to_process, nx_ctx->ap->sglen); | ||
nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * | ||
sizeof(struct nx_sg); | ||
} | ||
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NX_CPB_FDM(csbcpb) |= NX_FDM_INTERMEDIATE; | ||
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if (!nx_ctx->op.inlen || !nx_ctx->op.outlen) { | ||
rc = -EINVAL; | ||
goto out; | ||
} | ||
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rc = nx_hcall_sync(nx_ctx, &nx_ctx->op, | ||
desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP); | ||
if (rc) | ||
goto out; | ||
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atomic_inc(&(nx_ctx->stats->sha512_ops)); | ||
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/* copy the leftover back into the state struct */ | ||
memcpy(sctx->buf, data + len - leftover, leftover); | ||
sctx->count[0] = leftover; | ||
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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++; | ||
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/* everything after the first update is continuation */ | ||
NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION; | ||
out: | ||
return rc; | ||
} | ||
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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; | ||
u64 count0; | ||
int rc; | ||
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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); | ||
} | ||
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/* final is represented by continuing the operation and indicating that | ||
* this is not an intermediate operation */ | ||
NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE; | ||
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count0 = sctx->count[0] * 8; | ||
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csbcpb->cpb.sha512.message_bit_length_lo += count0; | ||
if (csbcpb->cpb.sha512.message_bit_length_lo < count0) | ||
csbcpb->cpb.sha512.message_bit_length_hi++; | ||
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in_sg = nx_build_sg_list(nx_ctx->in_sg, sctx->buf, sctx->count[0], | ||
nx_ctx->ap->sglen); | ||
out_sg = nx_build_sg_list(nx_ctx->out_sg, out, SHA512_DIGEST_SIZE, | ||
nx_ctx->ap->sglen); | ||
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); | ||
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if (!nx_ctx->op.outlen) { | ||
rc = -EINVAL; | ||
goto out; | ||
} | ||
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rc = nx_hcall_sync(nx_ctx, &nx_ctx->op, | ||
desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP); | ||
if (rc) | ||
goto out; | ||
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atomic_inc(&(nx_ctx->stats->sha512_ops)); | ||
atomic64_add(csbcpb->cpb.sha512.message_bit_length_lo, | ||
&(nx_ctx->stats->sha512_bytes)); | ||
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memcpy(out, csbcpb->cpb.sha512.message_digest, SHA512_DIGEST_SIZE); | ||
out: | ||
return rc; | ||
} | ||
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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; | ||
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/* 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; | ||
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octx->count[0] += sctx->count[0]; | ||
if (octx->count[0] < sctx->count[0]) | ||
octx->count[1]++; | ||
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memcpy(octx->buf, sctx->buf, sizeof(octx->buf)); | ||
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/* 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; | ||
} | ||
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return 0; | ||
} | ||
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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; | ||
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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; | ||
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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); | ||
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NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION; | ||
NX_CPB_FDM(csbcpb) |= NX_FDM_INTERMEDIATE; | ||
} | ||
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return 0; | ||
} | ||
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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, | ||
} | ||
}; |