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| author | Dmitry Kasatkin <dmitry.kasatkin@nokia.com> | 2010-11-19 17:04:27 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2010-11-27 11:37:18 +0300 |
| commit | 3c8d758ab528317ecd6d91f8651170ffd2331899 (patch) | |
| tree | 573bd8ac00f9a71ce2062bef99cd7d317b1f5aaa /drivers/crypto | |
| parent | 798eed5d9204b01862985ba0643ce5cf84114072 (diff) | |
| download | linux-3c8d758ab528317ecd6d91f8651170ffd2331899.tar.xz | |
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/crypto')
| -rw-r--r-- | 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 85d627774538..c8d30eb4794a 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); } |