[PATCH u-boot v2019.04-aspeed-openbmc 07/11] hash: Allow for SHA512 hardware implementations

[Joel Stanley <joel@jms.id.au>]

Similar to support for SHA1 and SHA256, allow the use of hardware hashing
engine by enabling the algorithm and setting  CONFIG_SHA_HW_ACCEL /
CONFIG_SHA_PROG_HW_ACCEL.

Signed-off-by: Joel Stanley <joel@jms.id.au>
---
 common/hash.c    | 24 ++++++++++++++++++++++--
 include/hw_sha.h | 26 ++++++++++++++++++++++++++
 lib/Kconfig      | 15 +++++++--------
 3 files changed, 55 insertions(+), 10 deletions(-)

diff --git a/common/hash.c b/common/hash.c
index c00ec4d36c41..a19cba07d779 100644
--- a/common/hash.c
+++ b/common/hash.c
@@ -86,7 +86,7 @@ static int hash_finish_sha256(struct hash_algo *algo, void *ctx, void
 }
 #endif
 
-#if defined(CONFIG_SHA384)
+#if defined(CONFIG_SHA384) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
 static int hash_init_sha384(struct hash_algo *algo, void **ctxp)
 {
 	sha512_context *ctx = malloc(sizeof(sha512_context));
@@ -114,7 +114,7 @@ static int hash_finish_sha384(struct hash_algo *algo, void *ctx, void
 }
 #endif
 
-#if defined(CONFIG_SHA512)
+#if defined(CONFIG_SHA512) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
 static int hash_init_sha512(struct hash_algo *algo, void **ctxp)
 {
 	sha512_context *ctx = malloc(sizeof(sha512_context));
@@ -249,10 +249,20 @@ static struct hash_algo hash_algo[] = {
 		.name		= "sha384",
 		.digest_size	= SHA384_SUM_LEN,
 		.chunk_size	= CHUNKSZ_SHA384,
+#ifdef CONFIG_SHA_HW_ACCEL
+		.hash_func_ws	= hw_sha384,
+#else
 		.hash_func_ws	= sha384_csum_wd,
+#endif
+#ifdef CONFIG_SHA_PROG_HW_ACCEL
+		.hash_init	= hw_sha_init,
+		.hash_update	= hw_sha_update,
+		.hash_finish	= hw_sha_finish,
+#else
 		.hash_init	= hash_init_sha384,
 		.hash_update	= hash_update_sha384,
 		.hash_finish	= hash_finish_sha384,
+#endif
 	},
 #endif
 #ifdef CONFIG_SHA512
@@ -260,10 +270,20 @@ static struct hash_algo hash_algo[] = {
 		.name		= "sha512",
 		.digest_size	= SHA512_SUM_LEN,
 		.chunk_size	= CHUNKSZ_SHA512,
+#ifdef CONFIG_SHA_HW_ACCEL
+		.hash_func_ws	= hw_sha512,
+#else
 		.hash_func_ws	= sha512_csum_wd,
+#endif
+#ifdef CONFIG_SHA_PROG_HW_ACCEL
+		.hash_init	= hw_sha_init,
+		.hash_update	= hw_sha_update,
+		.hash_finish	= hw_sha_finish,
+#else
 		.hash_init	= hash_init_sha512,
 		.hash_update	= hash_update_sha512,
 		.hash_finish	= hash_finish_sha512,
+#endif
 	},
 #endif
 	{
diff --git a/include/hw_sha.h b/include/hw_sha.h
index 991e496a3cb2..8cdf821218a0 100644
--- a/include/hw_sha.h
+++ b/include/hw_sha.h
@@ -8,6 +8,32 @@
 #define __HW_SHA_H
 #include <hash.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
+ *			64 bytes are copied to pout[0]...pout[63]. Thus, a user
+ *			should allocate at least 64 bytes at pOut in advance.
+ * @param chunk_size	chunk size for sha512
+ */
+void hw_sha512(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
+ *			48 bytes are copied to pout[0]...pout[47]. Thus, a user
+ *			should allocate at least 48 bytes at pOut in advance.
+ * @param chunk_size	chunk size for sha384
+ */
+void hw_sha384(const uchar * in_addr, uint buflen,
+			uchar * out_addr, uint chunk_size);
+
 /**
  * Computes hash value of input pbuf using h/w acceleration
  *
diff --git a/lib/Kconfig b/lib/Kconfig
index 984a783fd16f..f77272d0a94a 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -273,19 +273,18 @@ config SHA384
 config SHA_HW_ACCEL
 	bool "Enable hashing using hardware"
 	help
-	  This option enables hardware acceleration
-	  for SHA1/SHA256 hashing.
-	  This affects the 'hash' command and also the
-	  hash_lookup_algo() function.
+	  This option enables hardware acceleration for SHA hashing.
+	  This affects the 'hash' command and also the hash_lookup_algo()
+	  function.
 
 config SHA_PROG_HW_ACCEL
 	bool "Enable Progressive hashing support using hardware"
 	depends on SHA_HW_ACCEL
 	help
-	  This option enables hardware-acceleration for
-	  SHA1/SHA256 progressive hashing.
-	  Data can be streamed in a block at a time and the hashing
-	  is performed in hardware.
+	  This option enables hardware-acceleration for SHA progressive
+	  hashing.
+	  Data can be streamed in a block at a time and the hashing is
+	  performed in hardware.
 
 config MD5
 	bool
-- 
2.30.2