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crypto: omap-sham - hash-in-progress is stored in hw format 

Hash-in-progress is now stored in hw format.
Only on final call, hash is converted to correct format.
Speedup copy procedure and will allow to use OMAP burst mode.

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Dmitry Kasatkin 2010-11-19 16:04:27 +02:00 committed by Herbert Xu
parent 798eed5d92
commit 3c8d758ab5
1 changed files with 24 additions and 14 deletions
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38
drivers/crypto/omap-sham.c
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@ -204,24 +204,35 @@ static void omap_sham_copy_hash(struct ahash_request *req, int out)
u32 *hash = (u32 *)ctx->digest;
int i;
/* MD5 is almost unused. So copy sha1 size to reduce code */
for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(u32); i++) {
if (out)
hash[i] = omap_sham_read(ctx->dd,
SHA_REG_DIGEST(i));
else
omap_sham_write(ctx->dd,
SHA_REG_DIGEST(i), hash[i]);
}
}
static void omap_sham_copy_ready_hash(struct ahash_request *req)
{
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
u32 *in = (u32 *)ctx->digest;
u32 *hash = (u32 *)req->result;
int i;
if (!hash)
return;
if (likely(ctx->flags & FLAGS_SHA1)) {
/* SHA1 results are in big endian */
for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(u32); i++)
if (out)
hash[i] = be32_to_cpu(omap_sham_read(ctx->dd,
SHA_REG_DIGEST(i)));
else
omap_sham_write(ctx->dd, SHA_REG_DIGEST(i),
cpu_to_be32(hash[i]));
hash[i] = be32_to_cpu(in[i]);
} else {
/* MD5 results are in little endian */
for (i = 0; i < MD5_DIGEST_SIZE / sizeof(u32); i++)
if (out)
hash[i] = le32_to_cpu(omap_sham_read(ctx->dd,
SHA_REG_DIGEST(i)));
else
omap_sham_write(ctx->dd, SHA_REG_DIGEST(i),
cpu_to_le32(hash[i]));
hash[i] = le32_to_cpu(in[i]);
}
}
@ -474,8 +485,7 @@ static void omap_sham_cleanup(struct ahash_request *req)
spin_unlock_irqrestore(&dd->lock, flags);
if (ctx->digcnt)
memcpy(req->result, ctx->digest, (ctx->flags & FLAGS_SHA1) ?
SHA1_DIGEST_SIZE : MD5_DIGEST_SIZE);
omap_sham_copy_ready_hash(req);
dev_dbg(dd->dev, "digcnt: %d, bufcnt: %d\n", ctx->digcnt, ctx->bufcnt);
}