FRV: Provide dma_map_page() for NOMMU and fix comments

[linux-2.6-omap-h63xx.git] / arch / frv / mb93090-mb00 / pci-dma.c

diff --git a/arch/frv/mb93090-mb00/pci-dma.c b/arch/frv/mb93090-mb00/pci-dma.c
index 86fbdadc51b6b2eb01cbece116a7797e94467938..3ddedebc4eb3db1a1bbc25a7a10dd2e1fd1e66e5 100644 (file)
--- a/arch/frv/mb93090-mb00/pci-dma.c
+++ b/arch/frv/mb93090-mb00/pci-dma.c
@@ -15,6 +15,7 @@
 #include <linux/list.h>
 #include <linux/pci.h>
 #include <linux/highmem.h>
+#include <linux/scatterlist.h>
 #include <asm/io.h>
 
 void *dma_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t gfp)
@@ -28,11 +29,15 @@ void *dma_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t *dma_hand
        return ret;
 }
 
+EXPORT_SYMBOL(dma_alloc_coherent);
+
 void dma_free_coherent(struct device *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle)
 {
        consistent_free(vaddr);
 }
 
+EXPORT_SYMBOL(dma_free_coherent);
+
 /*
  * Map a single buffer of the indicated size for DMA in streaming mode.
  * The 32-bit bus address to use is returned.
@@ -51,10 +56,12 @@ dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
        return virt_to_bus(ptr);
 }
 
+EXPORT_SYMBOL(dma_map_single);
+
 /*
  * Map a set of buffers described by scatterlist in streaming
  * mode for DMA.  This is the scather-gather version of the
- * above pci_map_single interface.  Here the scatter gather list
+ * above dma_map_single interface.  Here the scatter gather list
  * elements are each tagged with the appropriate dma address
  * and length.  They are obtained via sg_dma_{address,length}(SG).
  *
@@ -64,7 +71,7 @@ dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
  *       The routine returns the number of addr/length pairs actually
  *       used, at most nents.
  *
- * Device ownership issues as mentioned above for pci_map_single are
+ * Device ownership issues as mentioned above for dma_map_single are
  * the same here.
  */
 int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
@@ -80,7 +87,7 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
        dampr2 = __get_DAMPR(2);
 
        for (i = 0; i < nents; i++) {
-               vaddr = kmap_atomic(sg[i].page, __KM_CACHE);
+               vaddr = kmap_atomic(sg_page(&sg[i]), __KM_CACHE);
 
                frv_dcache_writeback((unsigned long) vaddr,
                                     (unsigned long) vaddr + PAGE_SIZE);
@@ -96,6 +103,15 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
        return nents;
 }
 
+EXPORT_SYMBOL(dma_map_sg);
+
+/*
+ * Map a single page of the indicated size for DMA in streaming mode.
+ * The 32-bit bus address to use is returned.
+ *
+ * Device ownership issues as mentioned above for dma_map_single are
+ * the same here.
+ */
 dma_addr_t dma_map_page(struct device *dev, struct page *page, unsigned long offset,
                        size_t size, enum dma_data_direction direction)
 {
@@ -103,3 +119,5 @@ dma_addr_t dma_map_page(struct device *dev, struct page *page, unsigned long off
        flush_dcache_page(page);
        return (dma_addr_t) page_to_phys(page) + offset;
 }
+
+EXPORT_SYMBOL(dma_map_page);