x86: convert Calgary IOMMU driver to generic iommu_num_pages function

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 14 deletions

diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c
index 080d1d27f37a..e1e731d78f38 100644
--- a/arch/x86/kernel/pci-calgary_64.c
+++ b/arch/x86/kernel/pci-calgary_64.c
@@ -217,16 +217,6 @@ static inline unsigned long verify_bit_range(unsigned long* bitmap,
 
 #endif /* CONFIG_IOMMU_DEBUG */
 
-static inline unsigned int num_dma_pages(unsigned long dma, unsigned int dmalen)
-{
-        unsigned int npages;
-
-        npages = PAGE_ALIGN(dma + dmalen) - (dma & PAGE_MASK);
-        npages >>= PAGE_SHIFT;
-
-        return npages;
-}
-
 static inline int translation_enabled(struct iommu_table *tbl)
 {
         /* only PHBs with translation enabled have an IOMMU table */
@@ -408,7 +398,7 @@ static void calgary_unmap_sg(struct device *dev,
                 if (dmalen == 0)
                         break;
 
-                npages = num_dma_pages(dma, dmalen);
+                npages = iommu_num_pages(dma, dmalen, PAGE_SIZE);
                 iommu_free(tbl, dma, npages);
         }
 }
@@ -427,7 +417,7 @@ static int calgary_map_sg(struct device *dev, struct scatterlist *sg,
                 BUG_ON(!sg_page(s));
 
                 vaddr = (unsigned long) sg_virt(s);
-                npages = num_dma_pages(vaddr, s->length);
+                npages = iommu_num_pages(vaddr, s->length, PAGE_SIZE);
 
                 entry = iommu_range_alloc(dev, tbl, npages);
                 if (entry == bad_dma_address) {
@@ -464,7 +454,7 @@ static dma_addr_t calgary_map_single(struct device *dev, phys_addr_t paddr,
         struct iommu_table *tbl = find_iommu_table(dev);
 
         uaddr = (unsigned long)vaddr;
-        npages = num_dma_pages(uaddr, size);
+        npages = iommu_num_pages(uaddr, size, PAGE_SIZE);
 
         return iommu_alloc(dev, tbl, vaddr, npages, direction);
 }
@@ -475,7 +465,7 @@ static void calgary_unmap_single(struct device *dev, dma_addr_t dma_handle,
         struct iommu_table *tbl = find_iommu_table(dev);
         unsigned int npages;
 
-        npages = num_dma_pages(dma_handle, size);
+        npages = iommu_num_pages(dma_handle, size, PAGE_SIZE);
         iommu_free(tbl, dma_handle, npages);
 }