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Add more LinuxKPI I/O functions.

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Obtained from:	kmacy @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2016-05-10 12:04:57 +00:00
parent 7652bc32f7
commit 684a5fef01
1 changed files with 77 additions and 1 deletions
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78
sys/compat/linuxkpi/common/include/linux/io.h
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@ -35,6 +35,8 @@
#include <sys/endian.h>
#include <sys/types.h>
#include <linux/compiler.h>
static inline uint32_t
__raw_readl(const volatile void *addr)
{
@ -62,7 +64,7 @@ __raw_writeq(uint64_t b, volatile void *addr)
/*
* XXX This is all x86 specific. It should be bus space access.
*/
#define mmiowb()
#define mmiowb() barrier()
#undef writel
static inline void
@ -92,6 +94,27 @@ writew(uint16_t b, void *addr)
*(volatile uint16_t *)addr = b;
}
#undef ioread8
static inline uint8_t
ioread8(const volatile void *addr)
{
return *(const volatile uint8_t *)addr;
}
#undef ioread16
static inline uint16_t
ioread16(const volatile void *addr)
{
return *(const volatile uint16_t *)addr;
}
#undef ioread32
static inline uint32_t
ioread32(const volatile void *addr)
{
return *(const volatile uint32_t *)addr;
}
#undef ioread32be
static inline uint32_t
ioread32be(const volatile void *addr)
@ -99,6 +122,27 @@ ioread32be(const volatile void *addr)
return be32toh(*(const volatile uint32_t *)addr);
}
#undef iowrite8
static inline void
iowrite8(uint8_t v, volatile void *addr)
{
*(volatile uint8_t *)addr = v;
}
#undef iowrite16
static inline void
iowrite16(uint16_t v, volatile void *addr)
{
*(volatile uint16_t *)addr = v;
}
#undef iowrite32
static inline void
iowrite32(uint32_t v, volatile void *addr)
{
*(volatile uint32_t *)addr = v;
}
#undef iowrite32be
static inline void
iowrite32be(uint32_t v, volatile void *addr)
@ -137,6 +181,8 @@ void *_ioremap_attr(vm_paddr_t phys_addr, unsigned long size, int attr);
_ioremap_attr((addr), (size), VM_MEMATTR_UNCACHEABLE)
#define ioremap_wc(addr, size) \
_ioremap_attr((addr), (size), VM_MEMATTR_WRITE_COMBINING)
#define ioremap_wb(addr, size) \
_ioremap_attr((addr), (size), VM_MEMATTR_WRITE_BACK)
#define ioremap(addr, size) \
_ioremap_attr((addr), (size), VM_MEMATTR_UNCACHEABLE)
void iounmap(void *addr);
@ -166,5 +212,35 @@ __iowrite64_copy(void *to, void *from, size_t count)
#endif
}
enum {
MEMREMAP_WB = 1 << 0,
MEMREMAP_WT = 1 << 1,
MEMREMAP_WC = 1 << 2,
};
static inline void *
memremap(resource_size_t offset, size_t size, unsigned long flags)
{
void *addr = NULL;
if ((flags & MEMREMAP_WB) &&
(addr = ioremap_wb(offset, size)) != NULL)
goto done;
if ((flags & MEMREMAP_WT) &&
(addr = ioremap_nocache(offset, size)) != NULL)
goto done;
if ((flags & MEMREMAP_WC) &&
(addr = ioremap_wc(offset, size)) != NULL)
goto done;
done:
return (addr);
}
static inline void
memunmap(void *addr)
{
/* XXX May need to check if this is RAM */
iounmap(addr);
}
#endif /* _LINUX_IO_H_ */