linux-kernel - [Patch v4 5/7] crypto: qce: common: Clean up qce_auth

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Message-Id: <20210429150707.3168383-6-thara.gopinath@linaro.org>
Date:   Thu, 29 Apr 2021 11:07:05 -0400
From:   Thara Gopinath <thara.gopinath@...aro.org>
To:     herbert@...dor.apana.org.au, davem@...emloft.net,
        bjorn.andersson@...aro.org
Cc:     ebiggers@...gle.com, ardb@...nel.org, sivaprak@...eaurora.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: [Patch v4 5/7] crypto: qce: common: Clean up qce_auth_cfg

Remove various redundant checks in qce_auth_cfg. Also allow qce_auth_cfg
to take auth_size as a parameter which is a required setting for ccm(aes)
algorithms

Signed-off-by: Thara Gopinath <thara.gopinath@...aro.org>
---
 drivers/crypto/qce/common.c | 21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

diff --git a/drivers/crypto/qce/common.c b/drivers/crypto/qce/common.c
index 7b5bc5a6ae81..7b3d6caec1b2 100644
--- a/drivers/crypto/qce/common.c
+++ b/drivers/crypto/qce/common.c
@@ -97,11 +97,11 @@ static inline void qce_crypto_go(struct qce_device *qce, bool result_dump)
 }
 
 #ifdef CONFIG_CRYPTO_DEV_QCE_SHA
-static u32 qce_auth_cfg(unsigned long flags, u32 key_size)
+static u32 qce_auth_cfg(unsigned long flags, u32 key_size, u32 auth_size)
 {
 	u32 cfg = 0;
 
-	if (IS_AES(flags) && (IS_CCM(flags) || IS_CMAC(flags)))
+	if (IS_CCM(flags) || IS_CMAC(flags))
 		cfg |= AUTH_ALG_AES << AUTH_ALG_SHIFT;
 	else
 		cfg |= AUTH_ALG_SHA << AUTH_ALG_SHIFT;
@@ -119,15 +119,16 @@ static u32 qce_auth_cfg(unsigned long flags, u32 key_size)
 		cfg |= AUTH_SIZE_SHA256 << AUTH_SIZE_SHIFT;
 	else if (IS_CMAC(flags))
 		cfg |= AUTH_SIZE_ENUM_16_BYTES << AUTH_SIZE_SHIFT;
+	else if (IS_CCM(flags))
+		cfg |= (auth_size - 1) << AUTH_SIZE_SHIFT;
 
 	if (IS_SHA1(flags) || IS_SHA256(flags))
 		cfg |= AUTH_MODE_HASH << AUTH_MODE_SHIFT;
-	else if (IS_SHA1_HMAC(flags) || IS_SHA256_HMAC(flags) ||
-		 IS_CBC(flags) || IS_CTR(flags))
+	else if (IS_SHA1_HMAC(flags) || IS_SHA256_HMAC(flags))
 		cfg |= AUTH_MODE_HMAC << AUTH_MODE_SHIFT;
-	else if (IS_AES(flags) && IS_CCM(flags))
+	else if (IS_CCM(flags))
 		cfg |= AUTH_MODE_CCM << AUTH_MODE_SHIFT;
-	else if (IS_AES(flags) && IS_CMAC(flags))
+	else if (IS_CMAC(flags))
 		cfg |= AUTH_MODE_CMAC << AUTH_MODE_SHIFT;
 
 	if (IS_SHA(flags) || IS_SHA_HMAC(flags))
@@ -136,10 +137,6 @@ static u32 qce_auth_cfg(unsigned long flags, u32 key_size)
 	if (IS_CCM(flags))
 		cfg |= QCE_MAX_NONCE_WORDS << AUTH_NONCE_NUM_WORDS_SHIFT;
 
-	if (IS_CBC(flags) || IS_CTR(flags) || IS_CCM(flags) ||
-	    IS_CMAC(flags))
-		cfg |= BIT(AUTH_LAST_SHIFT) | BIT(AUTH_FIRST_SHIFT);
-
 	return cfg;
 }
 
@@ -171,7 +168,7 @@ static int qce_setup_regs_ahash(struct crypto_async_request *async_req)
 		qce_clear_array(qce, REG_AUTH_KEY0, 16);
 		qce_clear_array(qce, REG_AUTH_BYTECNT0, 4);
 
-		auth_cfg = qce_auth_cfg(rctx->flags, rctx->authklen);
+		auth_cfg = qce_auth_cfg(rctx->flags, rctx->authklen, digestsize);
 	}
 
 	if (IS_SHA_HMAC(rctx->flags) || IS_CMAC(rctx->flags)) {
@@ -199,7 +196,7 @@ static int qce_setup_regs_ahash(struct crypto_async_request *async_req)
 		qce_write_array(qce, REG_AUTH_BYTECNT0,
 				(u32 *)rctx->byte_count, 2);
 
-	auth_cfg = qce_auth_cfg(rctx->flags, 0);
+	auth_cfg = qce_auth_cfg(rctx->flags, 0, digestsize);
 
 	if (rctx->last_blk)
 		auth_cfg |= BIT(AUTH_LAST_SHIFT);
-- 
2.25.1