From a6727055971b4fa8d07db08088ff618c57f7d296 Mon Sep 17 00:00:00 2001
From: Andrey Smirnov <andrew.smirnov@gmail.com>
Date: Tue, 20 Aug 2019 13:24:00 -0700
Subject: [PATCH] crypto: caam - always select job ring via RSR on i.MX8MQ
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Per feedback from NXP tech support the way to use register based
service interface on i.MX8MQ is to follow the same set of steps
outlined for the case when virtualization is enabled, regardless if it
is. Current version of SRM for i.MX8MQ speaks of DECO DID_MS and DECO
DID_LS registers, but apparently those are not implemented, so the
case when SCFGR[VIRT_EN]=0 should be handled the same as the case when
SCFGR[VIRT_EN]=1
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Chris Spencer <christopher.spencer@sea.co.uk>
Cc: Cory Tusar <cory.tusar@zii.aero>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Horia GeantÄ <horia.geanta@nxp.com>
Cc: Aymen Sghaier <aymen.sghaier@nxp.com>
Cc: Leonard Crestez <leonard.crestez@nxp.com>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
drivers/crypto/caam/ctrl.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 4b7f95f64e34b..3b18e7e8da1fd 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -97,7 +97,12 @@ static inline int run_descriptor_deco0(struct device *ctrldev, u32 *desc,
int i;
- if (ctrlpriv->virt_en == 1) {
+ if (ctrlpriv->virt_en == 1 ||
+ /*
+ * Apparently on i.MX8MQ it doesn't matter if virt_en == 1
+ * and the following steps should be performed regardless
+ */
+ of_machine_is_compatible("fsl,imx8mq")) {
clrsetbits_32(&ctrl->deco_rsr, 0, DECORSR_JR0);
while (!(rd_reg32(&ctrl->deco_rsr) & DECORSR_VALID) &&
--
2.30.2