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iommu/vt-d: Introduce helper function iova_size() to improve code readability

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Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jiang Liu 2014-07-11 14:19:36 +08:00 committed by Joerg Roedel
parent 162d1b10d4
commit a156ef99e8
2 changed files with 8 additions and 4 deletions
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7
drivers/iommu/intel-iommu.c
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@ -3101,10 +3101,10 @@ static void flush_unmaps(void)
/* On real hardware multiple invalidations are expensive */
if (cap_caching_mode(iommu->cap))
iommu_flush_iotlb_psi(iommu, domain->id,
iova->pfn_lo, iova->pfn_hi - iova->pfn_lo + 1,
iova->pfn_lo, iova_size(iova),
!deferred_flush[i].freelist[j], 0);
else {
mask = ilog2(mm_to_dma_pfn(iova->pfn_hi - iova->pfn_lo + 1));
mask = ilog2(mm_to_dma_pfn(iova_size(iova)));
iommu_flush_dev_iotlb(deferred_flush[i].domain[j],
(uint64_t)iova->pfn_lo << PAGE_SHIFT, mask);
}
@ -3905,8 +3905,7 @@ static int intel_iommu_memory_notifier(struct notifier_block *nb,
rcu_read_lock();
for_each_active_iommu(iommu, drhd)
iommu_flush_iotlb_psi(iommu, si_domain->id,
iova->pfn_lo,
iova->pfn_hi - iova->pfn_lo + 1,
iova->pfn_lo, iova_size(iova),
!freelist, 0);
rcu_read_unlock();
dma_free_pagelist(freelist);

5
include/linux/iova.h
View File

@ -34,6 +34,11 @@ struct iova_domain {
unsigned long dma_32bit_pfn;
};
static inline unsigned long iova_size(struct iova *iova)
{
return iova->pfn_hi - iova->pfn_lo + 1;
}
struct iova *alloc_iova_mem(void);
void free_iova_mem(struct iova *iova);
void free_iova(struct iova_domain *iovad, unsigned long pfn);