[PATCH v3 6/8] omap-sham: hash-in-progress is stored in hw format

[Dmitry Kasatkin]

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.kasat...@nokia.com>
---
 drivers/crypto/omap-sham.c |   38 ++++++++++++++++++++++++--------------
 1 files changed, 24 insertions(+), 14 deletions(-)

diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 85d6277..c8d30eb 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);
 }
-- 
1.7.0.4

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