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authorAndrey Smirnov <andrew.smirnov@gmail.com>2019-08-20 13:23:51 -0700
committerHerbert Xu <herbert@gondor.apana.org.au>2019-08-30 18:05:29 +1000
commit9f5db8b5ea275fe22613a08bc6e3d9dedcbbf40f (patch)
treeca3c40261bd0f80af065fe3d2489375e31efee24 /drivers/crypto
parentd488dfd9b210e6d393627b418b35c2e8e851b9d6 (diff)
downloadlinux-9f5db8b5ea275fe22613a08bc6e3d9dedcbbf40f.tar.gz
crytpo: caam - make use of iowrite64*_hi_lo in wr_reg64
In order to be able to unify 64 and 32 bit implementations of wr_reg64, let's convert it to use helpers from <linux/io-64-nonatomic-hi-lo.h> first. Here are the steps of the transformation: 1. Inline wr_reg32 helpers: if (!caam_imx && caam_little_end) { if (caam_little_end) { iowrite32(data >> 32, (u32 __iomem *)(reg) + 1); iowrite32(data, (u32 __iomem *)(reg)); } else { iowrite32be(data >> 32, (u32 __iomem *)(reg) + 1); iowrite32be(data, (u32 __iomem *)(reg)); } } else { if (caam_little_end) { iowrite32(data >> 32, (u32 __iomem *)(reg)); iowrite32(data, (u32 __iomem *)(reg) + 1); } else { iowrite32be(data >> 32, (u32 __iomem *)(reg)); iowrite32be(data, (u32 __iomem *)(reg) + 1); } } 2. Transfrom the conditionals such that the check for 'caam_little_end' is at the top level: if (caam_little_end) { if (!caam_imx) { iowrite32(data >> 32, (u32 __iomem *)(reg) + 1); iowrite32(data, (u32 __iomem *)(reg)); } else { iowrite32(data >> 32, (u32 __iomem *)(reg)); iowrite32(data, (u32 __iomem *)(reg) + 1); } } else { iowrite32be(data >> 32, (u32 __iomem *)(reg)); iowrite32be(data, (u32 __iomem *)(reg) + 1); } 3. Invert the check for !caam_imx: if (caam_little_end) { if (caam_imx) { iowrite32(data >> 32, (u32 __iomem *)(reg)); iowrite32(data, (u32 __iomem *)(reg) + 1); } else { iowrite32(data >> 32, (u32 __iomem *)(reg) + 1); iowrite32(data, (u32 __iomem *)(reg)); } } else { iowrite32be(data >> 32, (u32 __iomem *)(reg)); iowrite32be(data, (u32 __iomem *)(reg) + 1); } 4. Make use of iowrite64* helpers from <linux/io-64-nonatomic-hi-lo.h> if (caam_little_end) { if (caam_imx) { iowrite32(data >> 32, (u32 __iomem *)(reg)); iowrite32(data, (u32 __iomem *)(reg) + 1); } else { iowrite64(data, reg); } } else { iowrite64be(data, reg); } No functional change intended. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Reviewed-by: Horia Geantă <horia.geanta@nxp.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 Geantă <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>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/caam/regs.h14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
index 7c7ea8af6a48..6acfef30a90c 100644
--- a/drivers/crypto/caam/regs.h
+++ b/drivers/crypto/caam/regs.h
@@ -12,6 +12,7 @@
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/io.h>
+#include <linux/io-64-nonatomic-hi-lo.h>
/*
* Architecture-specific register access methods
@@ -157,12 +158,15 @@ static inline u64 rd_reg64(void __iomem *reg)
#else /* CONFIG_64BIT */
static inline void wr_reg64(void __iomem *reg, u64 data)
{
- if (!caam_imx && caam_little_end) {
- wr_reg32((u32 __iomem *)(reg) + 1, data >> 32);
- wr_reg32((u32 __iomem *)(reg), data);
+ if (caam_little_end) {
+ if (caam_imx) {
+ iowrite32(data >> 32, (u32 __iomem *)(reg));
+ iowrite32(data, (u32 __iomem *)(reg) + 1);
+ } else {
+ iowrite64(data, reg);
+ }
} else {
- wr_reg32((u32 __iomem *)(reg), data >> 32);
- wr_reg32((u32 __iomem *)(reg) + 1, data);
+ iowrite64be(data, reg);
}
}