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iommu/vt-d: Introduce __mapping_notify_one() 

Introduce this new helper to notify one newly created mapping on one
single IOMMU.  We can further leverage this helper in the next patch.

Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Peter Xu 2018-05-04 10:34:52 +08:00 committed by Joerg Roedel
parent 6c50d79f66
commit eed91a0b85
1 changed files with 14 additions and 12 deletions
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26
drivers/iommu/intel-iommu.c
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@ -1606,6 +1606,18 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
iommu_flush_dev_iotlb(domain, addr, mask);
}
/* Notification for newly created mappings */
static inline void __mapping_notify_one(struct intel_iommu *iommu,
struct dmar_domain *domain,
unsigned long pfn, unsigned int pages)
{
/* It's a non-present to present mapping. Only flush if caching mode */
if (cap_caching_mode(iommu->cap))
iommu_flush_iotlb_psi(iommu, domain, pfn, pages, 0, 1);
else
iommu_flush_write_buffer(iommu);
}
static void iommu_flush_iova(struct iova_domain *iovad)
{
struct dmar_domain *domain;
@ -3625,13 +3637,7 @@ static dma_addr_t __intel_map_single(struct device *dev, phys_addr_t paddr,
if (ret)
goto error;
/* it's a non-present to present mapping. Only flush if caching mode */
if (cap_caching_mode(iommu->cap))
iommu_flush_iotlb_psi(iommu, domain,
mm_to_dma_pfn(iova_pfn),
size, 0, 1);
else
iommu_flush_write_buffer(iommu);
__mapping_notify_one(iommu, domain, mm_to_dma_pfn(iova_pfn), size);
start_paddr = (phys_addr_t)iova_pfn << PAGE_SHIFT;
start_paddr += paddr & ~PAGE_MASK;
@ -3819,11 +3825,7 @@ static int intel_map_sg(struct device *dev, struct scatterlist *sglist, int nele
return 0;
}
/* it's a non-present to present mapping. Only flush if caching mode */
if (cap_caching_mode(iommu->cap))
iommu_flush_iotlb_psi(iommu, domain, start_vpfn, size, 0, 1);
else
iommu_flush_write_buffer(iommu);
__mapping_notify_one(iommu, domain, start_vpfn, size);
return nelems;
}