powerpc/iommu: Update constant names to reflect their hardcoded page size

The powerpc iommu uses a hardcoded page size of 4K. This patch changes
the name of the IOMMU_PAGE_* macros to reflect the hardcoded values. A
future patch will use the existing names to support dynamic page
sizes.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 10 insertions, 9 deletions

diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 76a64821f4a2..2e89fa350763 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -520,14 +520,14 @@ static dma_addr_t vio_dma_iommu_map_page(struct device *dev, struct page *page,
         struct vio_dev *viodev = to_vio_dev(dev);
         dma_addr_t ret = DMA_ERROR_CODE;
 
-        if (vio_cmo_alloc(viodev, roundup(size, IOMMU_PAGE_SIZE))) {
+        if (vio_cmo_alloc(viodev, roundup(size, IOMMU_PAGE_SIZE_4K))) {
                 atomic_inc(&viodev->cmo.allocs_failed);
                 return ret;
         }
 
         ret = dma_iommu_ops.map_page(dev, page, offset, size, direction, attrs);
         if (unlikely(dma_mapping_error(dev, ret))) {
-                vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE));
+                vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE_4K));
                 atomic_inc(&viodev->cmo.allocs_failed);
         }
 
@@ -543,7 +543,7 @@ static void vio_dma_iommu_unmap_page(struct device *dev, dma_addr_t dma_handle,
 
         dma_iommu_ops.unmap_page(dev, dma_handle, size, direction, attrs);
 
-        vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE));
+        vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE_4K));
 }
 
 static int vio_dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
@@ -556,7 +556,7 @@ static int vio_dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
         size_t alloc_size = 0;
 
         for (sgl = sglist; count < nelems; count++, sgl++)
-                alloc_size += roundup(sgl->length, IOMMU_PAGE_SIZE);
+                alloc_size += roundup(sgl->length, IOMMU_PAGE_SIZE_4K);
 
         if (vio_cmo_alloc(viodev, alloc_size)) {
                 atomic_inc(&viodev->cmo.allocs_failed);
@@ -572,7 +572,7 @@ static int vio_dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
         }
 
         for (sgl = sglist, count = 0; count < ret; count++, sgl++)
-                alloc_size -= roundup(sgl->dma_length, IOMMU_PAGE_SIZE);
+                alloc_size -= roundup(sgl->dma_length, IOMMU_PAGE_SIZE_4K);
         if (alloc_size)
                 vio_cmo_dealloc(viodev, alloc_size);
 
@@ -590,7 +590,7 @@ static void vio_dma_iommu_unmap_sg(struct device *dev,
         int count = 0;
 
         for (sgl = sglist; count < nelems; count++, sgl++)
-                alloc_size += roundup(sgl->dma_length, IOMMU_PAGE_SIZE);
+                alloc_size += roundup(sgl->dma_length, IOMMU_PAGE_SIZE_4K);
 
         dma_iommu_ops.unmap_sg(dev, sglist, nelems, direction, attrs);
 
@@ -736,7 +736,8 @@ static int vio_cmo_bus_probe(struct vio_dev *viodev)
                         return -EINVAL;
                 }
 
-                viodev->cmo.desired = IOMMU_PAGE_ALIGN(viodrv->get_desired_dma(viodev));
+                viodev->cmo.desired =
+                        IOMMU_PAGE_ALIGN_4K(viodrv->get_desired_dma(viodev));
                 if (viodev->cmo.desired < VIO_CMO_MIN_ENT)
                         viodev->cmo.desired = VIO_CMO_MIN_ENT;
                 size = VIO_CMO_MIN_ENT;
@@ -1176,9 +1177,9 @@ static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev)
                             &tbl->it_index, &offset, &size);
 
         /* TCE table size - measured in tce entries */
-        tbl->it_size = size >> IOMMU_PAGE_SHIFT;
+        tbl->it_size = size >> IOMMU_PAGE_SHIFT_4K;
         /* offset for VIO should always be 0 */
-        tbl->it_offset = offset >> IOMMU_PAGE_SHIFT;
+        tbl->it_offset = offset >> IOMMU_PAGE_SHIFT_4K;
         tbl->it_busno = 0;
         tbl->it_type = TCE_VB;
         tbl->it_blocksize = 16;