linux-kernel - [PATCH v8 3/7] powerpc: iomap.c: introduce io{read|write}64_{lo_hi|hi

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Date:   Mon, 18 Sep 2017 17:12:54 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-ntb@...glegroups.com, linux-crypto@...r.kernel.org
Cc:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Horia Geantă <horia.geanta@....com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Subject: [PATCH v8 3/7] powerpc: iomap.c: introduce io{read|write}64_{lo_hi|hi_lo}

These functions will be introduced into the generic iomap.c so
they can deal with PIO accesses in hi-lo/lo-hi variants. Thus,
the powerpc version of iomap.c will need to provide the same
functions even though, in this arch, they are identical to the
regular io{read|write}64 functions.

Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
Tested-by: Horia Geantă <horia.geanta@....com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Michael Ellerman <mpe@...erman.id.au>
---
 arch/powerpc/kernel/iomap.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/arch/powerpc/kernel/iomap.c b/arch/powerpc/kernel/iomap.c
index a1854d1ded8b..b43dbadfd24f 100644
--- a/arch/powerpc/kernel/iomap.c
+++ b/arch/powerpc/kernel/iomap.c
@@ -44,12 +44,32 @@ u64 ioread64(void __iomem *addr)
 {
 	return readq(addr);
 }
+u64 ioread64_lo_hi(void __iomem *addr)
+{
+	return readq(addr);
+}
+u64 ioread64_hi_lo(void __iomem *addr)
+{
+	return readq(addr);
+}
 u64 ioread64be(void __iomem *addr)
 {
 	return readq_be(addr);
 }
+u64 ioread64be_lo_hi(void __iomem *addr)
+{
+	return readq_be(addr);
+}
+u64 ioread64be_hi_lo(void __iomem *addr)
+{
+	return readq_be(addr);
+}
 EXPORT_SYMBOL(ioread64);
+EXPORT_SYMBOL(ioread64_lo_hi);
+EXPORT_SYMBOL(ioread64_hi_lo);
 EXPORT_SYMBOL(ioread64be);
+EXPORT_SYMBOL(ioread64be_lo_hi);
+EXPORT_SYMBOL(ioread64be_hi_lo);
 #endif /* __powerpc64__ */
 
 void iowrite8(u8 val, void __iomem *addr)
@@ -82,12 +102,32 @@ void iowrite64(u64 val, void __iomem *addr)
 {
 	writeq(val, addr);
 }
+void iowrite64_lo_hi(u64 val, void __iomem *addr)
+{
+	writeq(val, addr);
+}
+void iowrite64_hi_lo(u64 val, void __iomem *addr)
+{
+	writeq(val, addr);
+}
 void iowrite64be(u64 val, void __iomem *addr)
 {
 	writeq_be(val, addr);
 }
+void iowrite64be_lo_hi(u64 val, void __iomem *addr)
+{
+	writeq_be(val, addr);
+}
+void iowrite64be_hi_lo(u64 val, void __iomem *addr)
+{
+	writeq_be(val, addr);
+}
 EXPORT_SYMBOL(iowrite64);
+EXPORT_SYMBOL(iowrite64_lo_hi);
+EXPORT_SYMBOL(iowrite64_hi_lo);
 EXPORT_SYMBOL(iowrite64be);
+EXPORT_SYMBOL(iowrite64be_lo_hi);
+EXPORT_SYMBOL(iowrite64be_hi_lo);
 #endif /* __powerpc64__ */
 
 /*
-- 
2.11.0