linux-kernel - [PATCH v2 4/5] crypto: hisilicon/sec - fix the CTR mode BD configuration

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Message-ID: <1628243066-32648-5-git-send-email-yekai13@huawei.com>
Date:   Fri, 6 Aug 2021 17:44:25 +0800
From:   Kai Ye <yekai13@...wei.com>
To:     <herbert@...dor.apana.org.au>
CC:     <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <wangzhou1@...ilicon.com>, <yekai13@...wei.com>
Subject: [PATCH v2 4/5] crypto: hisilicon/sec - fix the CTR mode BD configuration

The CTR counter is 32bit rollover default on the BD.
But the NIST standard is 128bit rollover. it cause the
testing failed, so need to fix the BD configuration.

Signed-off-by: Kai Ye <yekai13@...wei.com>
---
 drivers/crypto/hisilicon/sec2/sec_crypto.c | 6 ++++++
 drivers/crypto/hisilicon/sec2/sec_crypto.h | 6 ++++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/hisilicon/sec2/sec_crypto.c b/drivers/crypto/hisilicon/sec2/sec_crypto.c
index 387fb3c..5be1034 100644
--- a/drivers/crypto/hisilicon/sec2/sec_crypto.c
+++ b/drivers/crypto/hisilicon/sec2/sec_crypto.c
@@ -42,6 +42,8 @@
 #define SEC_DE_OFFSET_V3		9
 #define SEC_SCENE_OFFSET_V3	5
 #define SEC_CKEY_OFFSET_V3	13
+#define SEC_CTR_CNT_OFFSET	25
+#define SEC_CTR_CNT_ROLLOVER	2
 #define SEC_SRC_SGL_OFFSET_V3	11
 #define SEC_DST_SGL_OFFSET_V3	14
 #define SEC_CALG_OFFSET_V3	4
@@ -1301,6 +1303,10 @@ static int sec_skcipher_bd_fill_v3(struct sec_ctx *ctx, struct sec_req *req)
 		cipher = SEC_CIPHER_DEC;
 	sec_sqe3->c_icv_key |= cpu_to_le16(cipher);
 
+	/* Set the CTR counter mode is 128bit rollover */
+	sec_sqe3->auth_mac_key = cpu_to_le32((u32)SEC_CTR_CNT_ROLLOVER <<
+					SEC_CTR_CNT_OFFSET);
+
 	if (req->use_pbuf) {
 		bd_param |= SEC_PBUF << SEC_SRC_SGL_OFFSET_V3;
 		bd_param |= SEC_PBUF << SEC_DST_SGL_OFFSET_V3;
diff --git a/drivers/crypto/hisilicon/sec2/sec_crypto.h b/drivers/crypto/hisilicon/sec2/sec_crypto.h
index 9f71c35..5e039b5 100644
--- a/drivers/crypto/hisilicon/sec2/sec_crypto.h
+++ b/drivers/crypto/hisilicon/sec2/sec_crypto.h
@@ -354,8 +354,10 @@ struct sec_sqe3 {
 	 * akey_len: 9~14 bits
 	 * a_alg: 15~20 bits
 	 * key_sel: 21~24 bits
-	 * updata_key: 25 bits
-	 * reserved: 26~31 bits
+	 * ctr_count_mode/sm4_xts: 25~26 bits
+	 * sva_prefetch: 27 bits
+	 * key_wrap_num: 28~30 bits
+	 * update_key: 31 bits
 	 */
 	__le32 auth_mac_key;
 	__le32 salt;
-- 
2.7.4