[PATCH v12 2/9] parisc: iomap: introduce io{read|write}64

Logan Gunthorpe
2018-03-16T15:49:00Z

Add support for io{read|write}64() functions in parisc architecture.
These are pretty straightforward copies of similar functions which
make use of readq and writeq.

Also, indicate that the lo_hi and hi_lo variants of these functions
are not provided by this architecture.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
---
arch/parisc/include/asm/io.h | 9 +++++++
arch/parisc/lib/iomap.c | 64 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 73 insertions(+)

diff --git a/arch/parisc/include/asm/io.h b/arch/parisc/include/asm/io.h
index 27c62baa9c4e..34c133066d3c 100644
--- a/arch/parisc/include/asm/io.h
+++ b/arch/parisc/include/asm/io.h
@@ -311,6 +311,15 @@ extern void outsl (unsigned long port, const void *src, unsigned long count);
* value for either 32 or 64 bit mode */
#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))

+#define ioread64 ioread64
+#define ioread64be ioread64be
+#define iowrite64 iowrite64
+#define iowrite64be iowrite64be
+extern u64 ioread64(void __iomem *addr);
+extern u64 ioread64be(void __iomem *addr);
+extern void iowrite64(u64 val, void __iomem *addr);
+extern void iowrite64be(u64 val, void __iomem *addr);
+
#include <asm-generic/iomap.h>

/*
diff --git a/arch/parisc/lib/iomap.c b/arch/parisc/lib/iomap.c
index 4b19e6e64fb7..0195aec657e2 100644
--- a/arch/parisc/lib/iomap.c
+++ b/arch/parisc/lib/iomap.c
@@ -48,11 +48,15 @@ struct iomap_ops {
unsigned int (*read16be)(void __iomem *);
unsigned int (*read32)(void __iomem *);
unsigned int (*read32be)(void __iomem *);
+ u64 (*read64)(void __iomem *);
+ u64 (*read64be)(void __iomem *);
void (*write8)(u8, void __iomem *);
void (*write16)(u16, void __iomem *);
void (*write16be)(u16, void __iomem *);
void (*write32)(u32, void __iomem *);
void (*write32be)(u32, void __iomem *);
+ void (*write64)(u64, void __iomem *);
+ void (*write64be)(u64, void __iomem *);
void (*read8r)(void __iomem *, void *, unsigned long);
void (*read16r)(void __iomem *, void *, unsigned long);
void (*read32r)(void __iomem *, void *, unsigned long);
@@ -171,6 +175,16 @@ static unsigned int iomem_read32be(void __iomem *addr)
return __raw_readl(addr);
}

+static u64 iomem_read64(void __iomem *addr)
+{
+ return readq(addr);
+}
+
+static u64 iomem_read64be(void __iomem *addr)
+{
+ return __raw_readq(addr);
+}
+
static void iomem_write8(u8 datum, void __iomem *addr)
{
writeb(datum, addr);
@@ -196,6 +210,16 @@ static void iomem_write32be(u32 datum, void __iomem *addr)
__raw_writel(datum, addr);
}

+static void iomem_write64(u64 datum, void __iomem *addr)
+{
+ writel(datum, addr);
+}
+
+static void iomem_write64be(u64 datum, void __iomem *addr)
+{
+ __raw_writel(datum, addr);
+}
+
static void iomem_read8r(void __iomem *addr, void *dst, unsigned long count)
{
while (count--) {
@@ -250,11 +274,15 @@ static const struct iomap_ops iomem_ops = {
.read16be = iomem_read16be,
.read32 = iomem_read32,
.read32be = iomem_read32be,
+ .read64 = iomem_read64,
+ .read64be = iomem_read64be,
.write8 = iomem_write8,
.write16 = iomem_write16,
.write16be = iomem_write16be,
.write32 = iomem_write32,
.write32be = iomem_write32be,
+ .write64 = iomem_write64,
+ .write64be = iomem_write64be,
.read8r = iomem_read8r,
.read16r = iomem_read16r,
.read32r = iomem_read32r,
@@ -304,6 +332,20 @@ unsigned int ioread32be(void __iomem *addr)
return *((u32 *)addr);
}

+u64 ioread64(void __iomem *addr)
+{
+ if (unlikely(INDIRECT_ADDR(addr)))
+ return iomap_ops[ADDR_TO_REGION(addr)]->read64(addr);
+ return le64_to_cpup((u64 *)addr);
+}
+
+u64 ioread64be(void __iomem *addr)
+{
+ if (unlikely(INDIRECT_ADDR(addr)))
+ return iomap_ops[ADDR_TO_REGION(addr)]->read64be(addr);
+ return *((u64 *)addr);
+}
+
void iowrite8(u8 datum, void __iomem *addr)
{
if (unlikely(INDIRECT_ADDR(addr))) {
@@ -349,6 +391,24 @@ void iowrite32be(u32 datum, void __iomem *addr)
}
}

+void iowrite64(u64 datum, void __iomem *addr)
+{
+ if (unlikely(INDIRECT_ADDR(addr))) {
+ iomap_ops[ADDR_TO_REGION(addr)]->write64(datum, addr);
+ } else {
+ *((u64 *)addr) = cpu_to_le64(datum);
+ }
+}
+
+void iowrite64be(u64 datum, void __iomem *addr)
+{
+ if (unlikely(INDIRECT_ADDR(addr))) {
+ iomap_ops[ADDR_TO_REGION(addr)]->write64be(datum, addr);
+ } else {
+ *((u64 *)addr) = datum;
+ }
+}
+
/* Repeating interfaces */

void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
@@ -449,11 +509,15 @@ EXPORT_SYMBOL(ioread16);
EXPORT_SYMBOL(ioread16be);
EXPORT_SYMBOL(ioread32);
EXPORT_SYMBOL(ioread32be);
+EXPORT_SYMBOL(ioread64);
+EXPORT_SYMBOL(ioread64be);
EXPORT_SYMBOL(iowrite8);
EXPORT_SYMBOL(iowrite16);
EXPORT_SYMBOL(iowrite16be);
EXPORT_SYMBOL(iowrite32);
EXPORT_SYMBOL(iowrite32be);
+EXPORT_SYMBOL(iowrite64);
+EXPORT_SYMBOL(iowrite64be);
EXPORT_SYMBOL(ioread8_rep);
EXPORT_SYMBOL(ioread16_rep);
EXPORT_SYMBOL(ioread32_rep);
--
2.11.0