sparc64: use iommu_num_pages function in IOMMU code

Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/sparc64/kernel/iommu.c

@@ -575,7 +575,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
 		}
 		/* Allocate iommu entries for that segment */
 		paddr = (unsigned long) SG_ENT_PHYS_ADDRESS(s);
-		npages = iommu_nr_pages(paddr, slen);
+		npages = iommu_num_pages(paddr, slen, IO_PAGE_SIZE);
 		entry = iommu_range_alloc(dev, iommu, npages, &handle);
 
 		/* Handle failure */
@@ -647,7 +647,8 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
 			iopte_t *base;
 
 			vaddr = s->dma_address & IO_PAGE_MASK;
-			npages = iommu_nr_pages(s->dma_address, s->dma_length);
+			npages = iommu_num_pages(s->dma_address, s->dma_length,
+						 IO_PAGE_SIZE);
 			iommu_range_free(iommu, vaddr, npages);
 
 			entry = (vaddr - iommu->page_table_map_base)
@@ -715,7 +716,7 @@ static void dma_4u_unmap_sg(struct device *dev, struct scatterlist *sglist,
 
 		if (!len)
 			break;
-		npages = iommu_nr_pages(dma_handle, len);
+		npages = iommu_num_pages(dma_handle, len, IO_PAGE_SIZE);
 		iommu_range_free(iommu, dma_handle, npages);
 
 		entry = ((dma_handle - iommu->page_table_map_base)

arch/sparc64/kernel/iommu_common.h

@@ -35,17 +35,6 @@
 
 #define SG_ENT_PHYS_ADDRESS(SG)	(__pa(sg_virt((SG))))
 
-static inline unsigned long iommu_nr_pages(unsigned long vaddr,
-					    unsigned long slen)
-{
-	unsigned long npages;
-
-	npages = IO_PAGE_ALIGN(vaddr + slen) - (vaddr & IO_PAGE_MASK);
-	npages >>= IO_PAGE_SHIFT;
-
-	return npages;
-}
-
 static inline int is_span_boundary(unsigned long entry,
 				   unsigned long shift,
 				   unsigned long boundary_size,
@@ -53,7 +42,8 @@ static inline int is_span_boundary(unsigned long entry,
 				   struct scatterlist *sg)
 {
 	unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs);
-	int nr = iommu_nr_pages(paddr, outs->dma_length + sg->length);
+	int nr = iommu_num_pages(paddr, outs->dma_length + sg->length,
+				 IO_PAGE_SIZE);
 
 	return iommu_is_span_boundary(entry, nr, shift, boundary_size);
 }

arch/sparc64/kernel/pci_sun4v.c

@@ -384,7 +384,7 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
 		}
 		/* Allocate iommu entries for that segment */
 		paddr = (unsigned long) SG_ENT_PHYS_ADDRESS(s);
-		npages = iommu_nr_pages(paddr, slen);
+		npages = iommu_num_pages(paddr, slen, IO_PAGE_SIZE);
 		entry = iommu_range_alloc(dev, iommu, npages, &handle);
 
 		/* Handle failure */
@@ -461,7 +461,8 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
 			unsigned long vaddr, npages;
 
 			vaddr = s->dma_address & IO_PAGE_MASK;
-			npages = iommu_nr_pages(s->dma_address, s->dma_length);
+			npages = iommu_num_pages(s->dma_address, s->dma_length,
+						 IO_PAGE_SIZE);
 			iommu_range_free(iommu, vaddr, npages);
 			/* XXX demap? XXX */
 			s->dma_address = DMA_ERROR_CODE;
@@ -500,7 +501,7 @@ static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist,
 
 		if (!len)
 			break;
-		npages = iommu_nr_pages(dma_handle, len);
+		npages = iommu_num_pages(dma_handle, len, IO_PAGE_SIZE);
 		iommu_range_free(iommu, dma_handle, npages);
 
 		entry = ((dma_handle - iommu->page_table_map_base) >> IO_PAGE_SHIFT);