PPC32: Fix include/asm-ppc/dma-mapping.h for the !CONFIG_PCI case.

1 files changed, 153 insertions, 1 deletions

diff --git a/include/asm-ppc/dma-mapping.h b/include/asm-ppc/dma-mapping.h
index e7e16901f686..4b9a51dd2a1b 100644
--- a/include/asm-ppc/dma-mapping.h
+++ b/include/asm-ppc/dma-mapping.h
@@ -1 +1,153 @@
-#include <asm-generic/dma-mapping.h>
+/*
+ * This is based on both include/asm-sh/dma-mapping.h and
+ * include/asm-ppc/pci.h
+ */
+#ifndef __ASM_PPC_DMA_MAPPING_H
+#define __ASM_PPC_DMA_MAPPING_H
+
+#include <linux/config.h>
+/* we implement the API below in terms of the existing PCI one,
+ * so include it */
+#include <linux/pci.h>
+/* need struct page definitions */
+#include <linux/mm.h>
+#include <linux/device.h>
+#include <asm/scatterlist.h>
+#include <asm/io.h>
+
+#define dma_supported(dev, mask)	(1)
+
+static inline int dma_set_mask(struct device *dev, u64 dma_mask)
+{
+	if (!dev->dma_mask || !dma_supported(dev, mask))
+		return -EIO;
+
+	*dev->dma_mask = dma_mask;
+
+	return 0;
+}
+
+static inline void *dma_alloc_coherent(struct device *dev, size_t size,
+				       dma_addr_t * dma_handle, int flag)
+{
+#ifdef CONFIG_PCI
+	if (dev && dev->bus == &pci_bus_type)
+		return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle);
+#endif
+
+	return consistent_alloc(flag, size, dma_handle);
+}
+
+static inline void
+dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+		  dma_addr_t dma_handle)
+{
+#ifdef CONFIG_PCI
+	if (dev && dev->bus == &pci_bus_type) {
+		pci_free_consistent(to_pci_dev(dev), size, vaddr, dma_handle);
+		return;
+	}
+#endif
+
+	consistent_free(vaddr, size);
+}
+
+static inline dma_addr_t
+dma_map_single(struct device *dev, void *ptr, size_t size,
+	       enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+
+	consistent_sync(ptr, size, direction);
+
+	return virt_to_bus(ptr);
+}
+
+/* We do nothing. */
+#define dma_unmap_single(dev, addr, size, dir)	do { } while (0)
+
+static inline dma_addr_t
+dma_map_page(struct device *dev, struct page *page,
+	     unsigned long offset, size_t size,
+	     enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+	consistent_sync_page(page, offset, size, direction);
+	return (page - mem_map) * PAGE_SIZE + PCI_DRAM_OFFSET + offset;
+}
+
+/* We do nothing. */
+#define dma_unmap_single(dev, addr, size, dir)	do { } while (0)
+
+static inline int
+dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+	   enum dma_data_direction direction)
+{
+	int i;
+
+	BUG_ON(direction == DMA_NONE);
+
+	for (i = 0; i < nents; i++, sg++) {
+		BUG_ON(!sg->page);
+		consistent_sync_page(sg->page, sg->offset,
+				     sg->length, direction);
+		sg->dma_address = page_to_bus(sg->page) + sg->offset;
+	}
+
+	return nents;
+}
+
+/* We don't do anything here. */
+#define dma_unmap_sg(dev, sg, nents, dir)	do { } while (0)
+
+static inline void dma_sync_single(struct device *dev, dma_addr_t dma_handle,
+				   size_t size,
+				   enum dma_data_direction direction)
+{
+	BUG_ON(direction == DMA_NONE);
+
+	consistent_sync(bus_to_virt(dma_handle), size, direction);
+}
+
+static inline void dma_sync_sg(struct device *dev, struct scatterlist *sg,
+			       int nelems, enum dma_data_direction direction)
+{
+	int i;
+
+	BUG_ON(direction == DMA_NONE);
+
+	for (i = 0; i < nelems; i++, sg++)
+		consistent_sync_page(sg->page, sg->offset,
+				     sg->length, direction);
+}
+
+/* Now for the API extensions over the pci_ one */
+
+#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
+#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
+#define dma_is_consistent(d)	(1)
+
+static inline int dma_get_cache_alignment(void)
+{
+	/*
+	 * Each processor family will define its own L1_CACHE_SHIFT,
+	 * L1_CACHE_BYTES wraps to this, so this is always safe.
+	 */
+	return L1_CACHE_BYTES;
+}
+
+static inline void
+dma_sync_single_range(struct device *dev, dma_addr_t dma_handle,
+		      unsigned long offset, size_t size,
+		      enum dma_data_direction direction)
+{
+	/* just sync everything, that's all the pci API can do */
+	dma_sync_single(dev, dma_handle, offset + size, direction);
+}
+
+static inline void dma_cache_sync(void *vaddr, size_t size,
+				  enum dma_data_direction direction)
+{
+	consistent_sync(vaddr, size, (int)direction);
+}
+#endif				/* __ASM_PPC_DMA_MAPPING_H */