This patch adds generic io{read|write}64[be]{_lo_hi|_hi_lo} macros if
they are not already defined by the architecture. (As they are provided
by the generic iomap library).
The patch also points io{read|write}64[be] to the variant specified by the
header name.
This is because new drivers are encouraged to use ioreadXX, et al instead
of readX[1], et al -- and mixing ioreadXX with readq is pretty ugly.
[1] ldd3: section 9.4.2
Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
cc: Christoph Hellwig <hch@xxxxxx>
cc: Arnd Bergmann <arnd@xxxxxxxx>
cc: Alan Cox <gnomes@xxxxxxxxxxxxxxxxxxx>
cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
squash! io-64-nonatomic: add io{read|write}64[be] macros
---
include/linux/io-64-nonatomic-hi-lo.h | 62 +++++++++++++++++++++++++++++++++++
include/linux/io-64-nonatomic-lo-hi.h | 60 +++++++++++++++++++++++++++++++++
2 files changed, 122 insertions(+)
diff --git a/include/linux/io-64-nonatomic-hi-lo.h b/include/linux/io-64-nonatomic-hi-lo.h
index defcc4644ce3..845e67d4b1d2 100644
--- a/include/linux/io-64-nonatomic-hi-lo.h
+++ b/include/linux/io-64-nonatomic-hi-lo.h
@@ -54,4 +54,66 @@ static inline void hi_lo_writeq_relaxed(__u64 val, volatile void __iomem *addr)
#define writeq_relaxed hi_lo_writeq_relaxed
#endif
+#ifndef ioread64_hi_lo
+#define ioread64_hi_lo ioread64_hi_lo
+static inline u64 ioread64_hi_lo(void __iomem *addr)
+{
+ const u32 __iomem *p = addr;
+ u32 low, high;
+
+ high = ioread32(p + 1);
+ low = ioread32(p);
+
+ return low + ((u64)high << 32);
+}
+#endif
+
+#ifndef iowrite64_hi_lo
+#define iowrite64_hi_lo iowrite64_hi_lo
+static inline void iowrite64_hi_lo(u64 val, void __iomem *addr)
+{
+ iowrite32(val >> 32, addr + sizeof(u32));
+ iowrite32(val, addr);
+}
+#endif
+
+#ifndef ioread64be_hi_lo
+#define ioread64be_hi_lo ioread64be_hi_lo
+static inline u64 ioread64be_hi_lo(void __iomem *addr)
+{
+ const u32 __iomem *p = addr;
+ u32 low, high;
+
+ high = ioread32be(p);
+ low = ioread32be(p + 1);
+
+ return low + ((u64)high << 32);
+}
+#endif
+
+#ifndef iowrite64be_hi_lo
+#define iowrite64be_hi_lo iowrite64be_hi_lo
+static inline void iowrite64be_hi_lo(u64 val, void __iomem *addr)
+{
+ iowrite32be(val >> 32, addr);
+ iowrite32be(val, addr + sizeof(u32));
+}
+#endif
+
+#ifndef ioread64
+#define ioread64 ioread64_hi_lo
+#endif
+
+#ifndef iowrite64
+#define iowrite64 iowrite64_hi_lo
+#endif
+
+#ifndef ioread64be
+#define ioread64be(p) ioread64be_hi_lo
+#endif
+
+#ifndef iowrite64be
+#define iowrite64be(v, p) iowrite64be_hi_lo
+#endif
+
#endif /* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */
diff --git a/include/linux/io-64-nonatomic-lo-hi.h b/include/linux/io-64-nonatomic-lo-hi.h
index 084461a4e5ab..7ffa928a07fb 100644
--- a/include/linux/io-64-nonatomic-lo-hi.h
+++ b/include/linux/io-64-nonatomic-lo-hi.h
@@ -54,4 +54,64 @@ static inline void lo_hi_writeq_relaxed(__u64 val, volatile void __iomem *addr)
#define writeq_relaxed lo_hi_writeq_relaxed
#endif
+#ifndef ioread64_lo_hi
+#define ioread64_lo_hi ioread64_lo_hi
+static inline u64 ioread64_lo_hi(void __iomem *addr)
+{
+ u32 low, high;
+
+ low = ioread32(addr);
+ high = ioread32(addr + sizeof(u32));
+
+ return low + ((u64)high << 32);
+}
+#endif
+
+#ifndef iowrite64_lo_hi
+#define iowrite64_lo_hi iowrite64_lo_hi
+static inline void iowrite64_lo_hi(u64 val, void __iomem *addr)
+{
+ iowrite32(val, addr);
+ iowrite32(val >> 32, addr + sizeof(u32));
+}
+#endif
+
+#ifndef ioread64be_lo_hi
+#define ioread64be_lo_hi ioread64be_lo_hi
+static inline u64 ioread64be_lo_hi(void __iomem *addr)
+{
+ u32 low, high;
+
+ low = ioread32be(addr + sizeof(u32));
+ high = ioread32be(addr);
+
+ return low + ((u64)high << 32);
+}
+#endif
+
+#ifndef iowrite64be_lo_hi
+#define iowrite64be_lo_hi iowrite64be_lo_hi
+static inline void iowrite64be_lo_hi(u64 val, void __iomem *addr)
+{
+ iowrite32be(val, addr + sizeof(u32));
+ iowrite32be(val >> 32, addr);
+}
+#endif
+
+#ifndef ioread64
+#define ioread64 ioread64_lo_hi
+#endif
+
+#ifndef iowrite64
+#define iowrite64 iowrite64_lo_hi
+#endif
+
+#ifndef ioread64be
+#define ioread64be(p) ioread64be_lo_hi
+#endif
+
+#ifndef iowrite64be
+#define iowrite64be(v, p) iowrite64be_lo_hi
+#endif
+
#endif /* _LINUX_IO_64_NONATOMIC_LO_HI_H_ */
--
2.11.0
