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Date: Fri, 26 Sep 2014 15:39:49 +0200
From: Arnd Bergmann <arnd@...db.de>
To: Thierry Reding <thierry.reding@...il.com>
Cc: Will Deacon <will.deacon@....com>,
"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"benh@...nel.crashing.org" <benh@...nel.crashing.org>,
"chris@...kel.net" <chris@...kel.net>,
"cmetcalf@...era.com" <cmetcalf@...era.com>,
"davem@...emloft.net" <davem@...emloft.net>,
"deller@....de" <deller@....de>,
"dhowells@...hat.com" <dhowells@...hat.com>,
"geert@...ux-m68k.org" <geert@...ux-m68k.org>,
"heiko.carstens@...ibm.com" <heiko.carstens@...ibm.com>,
"hpa@...or.com" <hpa@...or.com>,
"jcmvbkbc@...il.com" <jcmvbkbc@...il.com>,
"jesper.nilsson@...s.com" <jesper.nilsson@...s.com>,
"mingo@...hat.com" <mingo@...hat.com>,
"monstr@...str.eu" <monstr@...str.eu>,
"paulmck@...ux.vnet.ibm.com" <paulmck@...ux.vnet.ibm.com>,
"rdunlap@...radead.org" <rdunlap@...radead.org>,
"sam@...nborg.org" <sam@...nborg.org>,
"schwidefsky@...ibm.com" <schwidefsky@...ibm.com>,
"starvik@...s.com" <starvik@...s.com>,
"takata@...ux-m32r.org" <takata@...ux-m32r.org>,
"tglx@...utronix.de" <tglx@...utronix.de>,
"tony.luck@...el.com" <tony.luck@...el.com>,
"daniel.thompson@...aro.org" <daniel.thompson@...aro.org>,
"broonie@...aro.org" <broonie@...aro.org>,
"linux@....linux.org.uk" <linux@....linux.org.uk>
Subject: Re: [PATCH v3 00/17] Cross-architecture definitions of relaxed MMIO accessors
On Friday 26 September 2014 10:05:52 Thierry Reding wrote:
> My original patch to consolidate the read*/write*() and friends
> explicitly avoided the use of macros to do this. The reason was that if
> we have static inline functions in asm-generic/io.h it defines the
> canonical prototype of these functions, so that architectures that want
> to override them can just copy the prototype from there.
>
> So for consistency the above would become:
>
> #ifndef readb_relaxed
> #define readb_relaxed readb_relaxed
> static inline u8 readb_relaxed(const void __iomem *addr)
> {
> return readb(addr);
> }
> #endif
>
> And analogously for the others. For the *_relaxed variants it's perhaps
> not as important because the signature is the same as for the plain
> variants, so I'm not objecting very strongly to the plain macros.
Ok. I'd prefer the brief version I think.
Russell found a number of other bugs with the series, the patch below
contains the fixes I've had to do so far.
I assume I'll add some more of these and then commit an update.
Arnd
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index 179ce4b93d9a..e9e70b19dc2f 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h
@@ -347,10 +347,12 @@ extern void _memset_io(volatile void __iomem *, int, size_t);
#define iowrite16be(v,p) ({ __iowmb(); __raw_writew((__force __u16)cpu_to_be16(v), p); })
#define iowrite32be(v,p) ({ __iowmb(); __raw_writew((__force __u32)cpu_to_be32(v), p); })
+#ifndef ioport_map
#define ioport_map ioport_map
extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
#define ioport_unmap ioport_unmap
extern void ioport_unmap(void __iomem *addr);
+#endif
struct pci_dev;
diff --git a/arch/arm/mach-ebsa110/include/mach/io.h b/arch/arm/mach-ebsa110/include/mach/io.h
index 11bb0799424b..72232a198d83 100644
--- a/arch/arm/mach-ebsa110/include/mach/io.h
+++ b/arch/arm/mach-ebsa110/include/mach/io.h
@@ -62,20 +62,30 @@ void __writel(u32 val, void __iomem *addr);
#define writew(v,b) __writew(v,b)
#define writel(v,b) __writel(v,b)
+#define insb insb
extern void insb(unsigned int port, void *buf, int sz);
+#define insw insw
extern void insw(unsigned int port, void *buf, int sz);
+#define insl insl
extern void insl(unsigned int port, void *buf, int sz);
+#define outsb outsb
extern void outsb(unsigned int port, const void *buf, int sz);
+#define outsw outsw
extern void outsw(unsigned int port, const void *buf, int sz);
+#define outsl outsl
extern void outsl(unsigned int port, const void *buf, int sz);
/* can't support writesb atm */
+#define writesw writesw
extern void writesw(void __iomem *addr, const void *data, int wordlen);
+#define writesl writesl
extern void writesl(void __iomem *addr, const void *data, int longlen);
/* can't support readsb atm */
+#define readsw readsw
extern void readsw(const void __iomem *addr, void *data, int wordlen);
+#define readsl readsl
extern void readsl(const void __iomem *addr, void *data, int longlen);
#endif
diff --git a/arch/arm/mach-ixp4xx/include/mach/io.h b/arch/arm/mach-ixp4xx/include/mach/io.h
index 559c69a47731..3e74cd3be9bd 100644
--- a/arch/arm/mach-ixp4xx/include/mach/io.h
+++ b/arch/arm/mach-ixp4xx/include/mach/io.h
@@ -225,7 +225,7 @@ static inline void __indirect_readsl(const volatile void __iomem *bus_addr,
* transaction. This means that we need to override the default
* I/O functions.
*/
-
+#define outb outb
static inline void outb(u8 value, u32 addr)
{
u32 n, byte_enables, data;
@@ -235,12 +235,14 @@ static inline void outb(u8 value, u32 addr)
ixp4xx_pci_write(addr, byte_enables | NP_CMD_IOWRITE, data);
}
+#define outsb outsb
static inline void outsb(u32 io_addr, const u8 *vaddr, u32 count)
{
while (count--)
outb(*vaddr++, io_addr);
}
+#define outw outw
static inline void outw(u16 value, u32 addr)
{
u32 n, byte_enables, data;
@@ -250,23 +252,27 @@ static inline void outw(u16 value, u32 addr)
ixp4xx_pci_write(addr, byte_enables | NP_CMD_IOWRITE, data);
}
+#define outsw outsw
static inline void outsw(u32 io_addr, const u16 *vaddr, u32 count)
{
while (count--)
outw(cpu_to_le16(*vaddr++), io_addr);
}
+#define outl outl
static inline void outl(u32 value, u32 addr)
{
ixp4xx_pci_write(addr, NP_CMD_IOWRITE, value);
}
+#define outsl outsl
static inline void outsl(u32 io_addr, const u32 *vaddr, u32 count)
{
while (count--)
outl(cpu_to_le32(*vaddr++), io_addr);
}
+#define inb inb
static inline u8 inb(u32 addr)
{
u32 n, byte_enables, data;
@@ -278,12 +284,14 @@ static inline u8 inb(u32 addr)
return data >> (8*n);
}
+#define insb insb
static inline void insb(u32 io_addr, u8 *vaddr, u32 count)
{
while (count--)
*vaddr++ = inb(io_addr);
}
+#define inw inw
static inline u16 inw(u32 addr)
{
u32 n, byte_enables, data;
@@ -295,12 +303,14 @@ static inline u16 inw(u32 addr)
return data>>(8*n);
}
+#define insw insw
static inline void insw(u32 io_addr, u16 *vaddr, u32 count)
{
while (count--)
*vaddr++ = le16_to_cpu(inw(io_addr));
}
+#define inl inl
static inline u32 inl(u32 addr)
{
u32 data;
@@ -310,6 +320,7 @@ static inline u32 inl(u32 addr)
return data;
}
+#define insl insl
static inline void insl(u32 io_addr, u32 *vaddr, u32 count)
{
while (count--)
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index 6aeb6add49a6..7872527c08db 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -560,35 +560,53 @@ static inline void outsl_p(unsigned long addr, const void *buffer,
#endif
#ifndef CONFIG_GENERIC_IOMAP
+#ifndef ioread8
+#define ioread8 ioread8
static inline u8 ioread8(const void __iomem *addr)
{
return readb(addr);
}
+#endif
+#ifndef ioread16
+#define ioread16 ioread16
static inline u16 ioread16(const void __iomem *addr)
{
return readw(addr);
}
+#endif
+#ifndef ioread32
+#define ioread32 ioread32
static inline u32 ioread32(const void __iomem *addr)
{
return readl(addr);
}
+#endif
+#ifndef iowrite8
+#define iowrite8 iowrite8
static inline void iowrite8(u8 value, void __iomem *addr)
{
writeb(value, addr);
}
+#endif
+#ifndef iowrite16
+#define iowrite16 iowrite16
static inline void iowrite16(u16 value, void __iomem *addr)
{
writew(value, addr);
}
+#endif
+#ifndef iowrite32
+#define iowrite32 iowrite32
static inline void iowrite32(u32 value, void __iomem *addr)
{
writel(value, addr);
}
+#endif
#ifndef ioread16be
#define ioread16be ioread16be
--
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