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iommu/vt-d: Use lo_hi_readq() / lo_hi_writeq() 

There is already helper functions to do 64-bit I/O on 32-bit machines or
buses, thus we don't need to reinvent the wheel.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
hifive-unleashed-5.1
Andy Shevchenko 2017-03-16 16:23:55 +02:00 committed by Joerg Roedel
parent f9808079aa
commit 61012985eb
1 changed files with 2 additions and 16 deletions
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18
include/linux/intel-iommu.h
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@ -30,6 +30,8 @@
#include <linux/mmu_notifier.h>
#include <linux/list.h>
#include <linux/iommu.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <asm/cacheflush.h>
#include <asm/iommu.h>
@ -72,24 +74,8 @@
#define OFFSET_STRIDE (9)
#ifdef CONFIG_64BIT
#define dmar_readq(a) readq(a)
#define dmar_writeq(a,v) writeq(v,a)
#else
static inline u64 dmar_readq(void __iomem *addr)
{
u32 lo, hi;
lo = readl(addr);
hi = readl(addr + 4);
return (((u64) hi) << 32) + lo;
}
static inline void dmar_writeq(void __iomem *addr, u64 val)
{
writel((u32)val, addr);
writel((u32)(val >> 32), addr + 4);
}
#endif
#define DMAR_VER_MAJOR(v) (((v) & 0xf0) >> 4)
#define DMAR_VER_MINOR(v) ((v) & 0x0f)