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authorDmitry Kasatkin <dmitry.kasatkin@nokia.com>2010-11-19 16:04:27 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2010-11-27 16:37:18 +0800
commit3c8d758ab528317ecd6d91f8651170ffd2331899 (patch)
tree573bd8ac00f9a71ce2062bef99cd7d317b1f5aaa /drivers
parent798eed5d9204b01862985ba0643ce5cf84114072 (diff)
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/crypto/omap-sham.c38
1 files changed, 24 insertions, 14 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 85d62777453..c8d30eb4794 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -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);
}