linux-kernel - [PATCH v4 07/17] crypto: sun8i-ce: handle endianness of t_common

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Message-Id: <1595358391-34525-8-git-send-email-clabbe@baylibre.com>
Date:   Tue, 21 Jul 2020 19:06:21 +0000
From:   Corentin Labbe <clabbe@...libre.com>
To:     davem@...emloft.net, herbert@...dor.apana.org.au,
        mripard@...nel.org, wens@...e.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, Corentin Labbe <clabbe@...libre.com>
Subject: [PATCH v4 07/17] crypto: sun8i-ce: handle endianness of t_common_ctl

t_common_ctl is LE32 so we need to convert its value before using it.
This value is only used on H6 (ignored on other SoCs) and not handling
the endianness cause failure on xRNG/hashes operations on H6 when running BE.

Fixes: 06f751b61329 ("crypto: allwinner - Add sun8i-ce Crypto Engine")
Signed-off-by: Corentin Labbe <clabbe@...libre.com>
---
 drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
index 0bf8f29c5ae8..0b47a51e1cfc 100644
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
@@ -120,7 +120,10 @@ int sun8i_ce_run_task(struct sun8i_ce_dev *ce, int flow, const char *name)
 	/* Be sure all data is written before enabling the task */
 	wmb();
 
-	v = 1 | (ce->chanlist[flow].tl->t_common_ctl & 0x7F) << 8;
+	/* Only H6 needs to write a part of t_common_ctl along with "1", but since it is ignored
+	 * on older SoCs, we have no reason to complicate things.
+	 */
+	v = 1 | ((le32_to_cpu(ce->chanlist[flow].tl->t_common_ctl) & 0x7F) << 8);
 	writel(v, ce->base + CE_TLR);
 	mutex_unlock(&ce->mlock);
 
-- 
2.26.2