1 files changed, 41 insertions, 61 deletions

diff --git a/arch/alpha/kernel/pci-noop.c b/arch/alpha/kernel/pci-noop.c
index c19a376520f4..246100ef07c2 100644
--- a/arch/alpha/kernel/pci-noop.c
+++ b/arch/alpha/kernel/pci-noop.c
@@ -7,6 +7,7 @@
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/bootmem.h>
+#include <linux/gfp.h>
 #include <linux/capability.h>
 #include <linux/mm.h>
 #include <linux/errno.h>
@@ -106,58 +107,8 @@ sys_pciconfig_write(unsigned long bus, unsigned long dfn,
                 return -ENODEV;
 }
 
-/* Stubs for the routines in pci_iommu.c: */
-
-void *
-__pci_alloc_consistent(struct pci_dev *pdev, size_t size,
-                       dma_addr_t *dma_addrp, gfp_t gfp)
-{
-        return NULL;
-}
-
-void
-pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr,
-                    dma_addr_t dma_addr)
-{
-}
-
-dma_addr_t
-pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size,
-               int direction)
-{
-        return (dma_addr_t) 0;
-}
-
-void
-pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
-                 int direction)
-{
-}
-
-int
-pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
-           int direction)
-{
-        return 0;
-}
-
-void
-pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
-             int direction)
-{
-}
-
-int
-pci_dma_supported(struct pci_dev *hwdev, dma_addr_t mask)
-{
-        return 0;
-}
-
-/* Generic DMA mapping functions: */
-
-void *
-dma_alloc_coherent(struct device *dev, size_t size,
-                   dma_addr_t *dma_handle, gfp_t gfp)
+static void *alpha_noop_alloc_coherent(struct device *dev, size_t size,
+                                       dma_addr_t *dma_handle, gfp_t gfp)
 {
         void *ret;
 
@@ -171,11 +122,22 @@ dma_alloc_coherent(struct device *dev, size_t size,
         return ret;
 }
 
-EXPORT_SYMBOL(dma_alloc_coherent);
+static void alpha_noop_free_coherent(struct device *dev, size_t size,
+                                     void *cpu_addr, dma_addr_t dma_addr)
+{
+        free_pages((unsigned long)cpu_addr, get_order(size));
+}
+
+static dma_addr_t alpha_noop_map_page(struct device *dev, struct page *page,
+                                      unsigned long offset, size_t size,
+                                      enum dma_data_direction dir,
+                                      struct dma_attrs *attrs)
+{
+        return page_to_pa(page) + offset;
+}
 
-int
-dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
-           enum dma_data_direction direction)
+static int alpha_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
+                             enum dma_data_direction dir, struct dma_attrs *attrs)
 {
         int i;
         struct scatterlist *sg;
@@ -192,19 +154,37 @@ dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
         return nents;
 }
 
-EXPORT_SYMBOL(dma_map_sg);
+static int alpha_noop_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+        return 0;
+}
+
+static int alpha_noop_supported(struct device *dev, u64 mask)
+{
+        return mask < 0x00ffffffUL ? 0 : 1;
+}
 
-int
-dma_set_mask(struct device *dev, u64 mask)
+static int alpha_noop_set_mask(struct device *dev, u64 mask)
 {
         if (!dev->dma_mask || !dma_supported(dev, mask))
                 return -EIO;
 
         *dev->dma_mask = mask;
-
         return 0;
 }
-EXPORT_SYMBOL(dma_set_mask);
+
+struct dma_map_ops alpha_noop_ops = {
+        .alloc_coherent         = alpha_noop_alloc_coherent,
+        .free_coherent          = alpha_noop_free_coherent,
+        .map_page               = alpha_noop_map_page,
+        .map_sg                 = alpha_noop_map_sg,
+        .mapping_error          = alpha_noop_mapping_error,
+        .dma_supported          = alpha_noop_supported,
+        .set_dma_mask           = alpha_noop_set_mask,
+};
+
+struct dma_map_ops *dma_ops = &alpha_noop_ops;
+EXPORT_SYMBOL(dma_ops);
 
 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
 {