intel-iommu: Change addr_to_dma_pte() to pfn_to_dma_pte()

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 21dc77311863abea95d9284a3407f90d10edeb13..dfbabd151a9c863615c60a2dbb76613d28f53d00 100644 (file)
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -692,23 +692,24 @@ static inline unsigned long align_to_level(unsigned long pfn, int level)
        return (pfn + level_size(level) - 1) & level_mask(level);
 }
 
-static struct dma_pte * addr_to_dma_pte(struct dmar_domain *domain, u64 addr)
+static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,
+                                     unsigned long pfn)
 {
-       int addr_width = agaw_to_width(domain->agaw);
+       int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT;
        struct dma_pte *parent, *pte = NULL;
        int level = agaw_to_level(domain->agaw);
        int offset;
        unsigned long flags;
 
        BUG_ON(!domain->pgd);
-       BUG_ON(addr >> addr_width);
+       BUG_ON(addr_width < BITS_PER_LONG && pfn >> addr_width);
        parent = domain->pgd;
 
        spin_lock_irqsave(&domain->mapping_lock, flags);
        while (level > 0) {
                void *tmp_page;
 
-               offset = pfn_level_offset(addr >> VTD_PAGE_SHIFT, level);
+               offset = pfn_level_offset(pfn, level);
                pte = &parent[offset];
                if (level == 1)
                        break;
@@ -1660,7 +1661,7 @@ domain_page_mapping(struct dmar_domain *domain, dma_addr_t iova,
        end_pfn = (VTD_PAGE_ALIGN(((u64)hpa) + size)) >> VTD_PAGE_SHIFT;
        index = 0;
        while (start_pfn < end_pfn) {
-               pte = addr_to_dma_pte(domain, iova + VTD_PAGE_SIZE * index);
+               pte = pfn_to_dma_pte(domain, (iova >> VTD_PAGE_SHIFT) + index);
                if (!pte)
                        return -ENOMEM;
                /* We don't need lock here, nobody else
@@ -3533,7 +3534,7 @@ static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain,
        struct dma_pte *pte;
        u64 phys = 0;
 
-       pte = addr_to_dma_pte(dmar_domain, iova);
+       pte = pfn_to_dma_pte(dmar_domain, iova >> VTD_PAGE_SHIFT);
        if (pte)
                phys = dma_pte_addr(pte);