[U-Boot] [PATCH 3/4 v8] gen: Add sha h/w acceleration to hash

[Akshay Saraswat]

Adding H/W acceleration support to hash which can be used
to test SHA 256 hash algorithm.

Signed-off-by: ARUN MANKUZHI <arun.m at samsung.com>
Signed-off-by: Akshay Saraswat <akshay.s at samsung.com>
Acked-by: Simon Glass <sjg at chromium.org>
---
Changes since v1:
	- Added sha256 support to "hash" command instead of new sha256 command.

Changes sice v2:
	- Added new nodes for SHA1 and SHA256 in struct hash_algo for the case when ACE is enabled.
	- Added new declaration for function pointer hash_func_ws with different return type.

Changes sice v3:
	- Changed command names to lower case in algo struct.
	- Added generic ace_sha config.

Changes sice v4:
	- Changed function names in struct algo.
	- Replaced ACE_SHA_TYPE to CHUNSZ in struct algo.

Changes sice v5:
	- Added file hw_sha.h.
	- Changed CONFIG_ACE_SHA to CONFIG_SHA_HW_ACCEL.
	- Renamed function names ace_sha1 and ace_sha256 to hw_sha1 and hw_sha256 respectively.

Changes sice v6:
	- Changed position of "hw_sha.h" among includes (alpha order).
	- Rebased patch.

Changes sice v7:
	- Added "Acked-by: Simon Glass <sjg at chromium.org>".

 common/hash.c    | 18 ++++++++++++++++++
 include/hw_sha.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 include/hw_sha.h

diff --git a/common/hash.c b/common/hash.c
index f5badcb..c9ac33e 100644
--- a/common/hash.c
+++ b/common/hash.c
@@ -25,6 +25,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <hw_sha.h>
 #include <hash.h>
 #include <sha1.h>
 #include <sha256.h>
@@ -37,6 +38,23 @@
  */
 static struct hash_algo hash_algo[] = {
 	/*
+	 * CONFIG_SHA_HW_ACCEL is defined if hardware acceleration is
+	 * available.
+	 */
+#ifdef CONFIG_SHA_HW_ACCEL
+	{
+		"sha1",
+		SHA1_SUM_LEN,
+		hw_sha1,
+		CHUNKSZ_SHA1,
+	}, {
+		"sha256",
+		SHA256_SUM_LEN,
+		hw_sha256,
+		CHUNKSZ_SHA256,
+	},
+#endif
+	/*
 	 * This is CONFIG_CMD_SHA1SUM instead of CONFIG_SHA1 since otherwise
 	 * it bloats the code for boards which use SHA1 but not the 'hash'
 	 * or 'sha1sum' commands.
diff --git a/include/hw_sha.h b/include/hw_sha.h
new file mode 100644
index 0000000..264936c
--- /dev/null
+++ b/include/hw_sha.h
@@ -0,0 +1,50 @@
+/*
+ * Header file for SHA hardware acceleration
+ *
+ * Copyright (c) 2012  Samsung Electronics
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+#ifndef __HW_SHA_H
+#define __HW_SHA_H
+
+
+/**
+ * Computes hash value of input pbuf using h/w acceleration
+ *
+ * @param in_addr	A pointer to the input buffer
+ * @param bufleni	Byte length of input buffer
+ * @param out_addr	A pointer to the output buffer. When complete
+ *			32 bytes are copied to pout[0]...pout[31]. Thus, a user
+ *			should allocate at least 32 bytes at pOut in advance.
+ * @param chunk_size	chunk size for sha256
+ */
+void hw_sha256(const uchar * in_addr, uint buflen,
+			uchar * out_addr, uint chunk_size);
+
+/**
+ * Computes hash value of input pbuf using h/w acceleration
+ *
+ * @param in_addr	A pointer to the input buffer
+ * @param bufleni	Byte length of input buffer
+ * @param out_addr	A pointer to the output buffer. When complete
+ *			32 bytes are copied to pout[0]...pout[31]. Thus, a user
+ *			should allocate at least 32 bytes at pOut in advance.
+ * @param chunk_size	chunk_size for sha1
+ */
+void hw_sha1(const uchar * in_addr, uint buflen,
+			uchar * out_addr, uint chunk_size);
+#endif
-- 
1.8.0