1 files changed, 42 insertions, 35 deletions

diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index 64b8f7f96f9..b81d9dbf9fe 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -10,84 +10,91 @@
  * for more details.
  */
 #include <linux/mm.h>
+#include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
+#include <linux/dma-debug.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/gfp.h>
 #include <asm/cacheflush.h>
 #include <asm/addrspace.h>
-#include <asm/io.h>
-
-struct dma_coherent_mem {
-	void		*virt_base;
-	u32		device_base;
-	int		size;
-	int		flags;
-	unsigned long	*bitmap;
-};
-
-void *dma_alloc_coherent(struct device *dev, size_t size,
-			   dma_addr_t *dma_handle, gfp_t gfp)
+
+#define PREALLOC_DMA_DEBUG_ENTRIES	4096
+
+struct dma_map_ops *dma_ops;
+EXPORT_SYMBOL(dma_ops);
+
+static int __init dma_init(void)
+{
+	dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
+	return 0;
+}
+fs_initcall(dma_init);
+
+void *dma_generic_alloc_coherent(struct device *dev, size_t size,
+				 dma_addr_t *dma_handle, gfp_t gfp,
+				 struct dma_attrs *attrs)
 {
 	void *ret, *ret_nocache;
 	int order = get_order(size);
 
-	if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
-		return ret;
+	gfp |= __GFP_ZERO;
 
 	ret = (void *)__get_free_pages(gfp, order);
 	if (!ret)
 		return NULL;
 
-	memset(ret, 0, size);
 	/*
 	 * Pages from the page allocator may have data present in
 	 * cache. So flush the cache before using uncached memory.
 	 */
 	dma_cache_sync(dev, ret, size, DMA_BIDIRECTIONAL);
 
-	ret_nocache = ioremap_nocache(virt_to_phys(ret), size);
+	ret_nocache = (void __force *)ioremap_nocache(virt_to_phys(ret), size);
 	if (!ret_nocache) {
 		free_pages((unsigned long)ret, order);
 		return NULL;
 	}
 
+	split_page(pfn_to_page(virt_to_phys(ret) >> PAGE_SHIFT), order);
+
 	*dma_handle = virt_to_phys(ret);
+
 	return ret_nocache;
 }
-EXPORT_SYMBOL(dma_alloc_coherent);
 
-void dma_free_coherent(struct device *dev, size_t size,
-			 void *vaddr, dma_addr_t dma_handle)
+void dma_generic_free_coherent(struct device *dev, size_t size,
+			       void *vaddr, dma_addr_t dma_handle,
+			       struct dma_attrs *attrs)
 {
-	struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
 	int order = get_order(size);
+	unsigned long pfn = dma_handle >> PAGE_SHIFT;
+	int k;
 
-	if (!dma_release_from_coherent(dev, order, vaddr)) {
-		WARN_ON(irqs_disabled());	/* for portability */
-		BUG_ON(mem && mem->flags & DMA_MEMORY_EXCLUSIVE);
-		free_pages((unsigned long)phys_to_virt(dma_handle), order);
-		iounmap(vaddr);
-	}
+	for (k = 0; k < (1 << order); k++)
+		__free_pages(pfn_to_page(pfn + k), 0);
+
+	iounmap(vaddr);
 }
-EXPORT_SYMBOL(dma_free_coherent);
 
 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 		    enum dma_data_direction direction)
 {
-#ifdef CONFIG_CPU_SH5
-	void *p1addr = vaddr;
-#else
-	void *p1addr = (void*) P1SEGADDR((unsigned long)vaddr);
-#endif
+	void *addr;
+
+	addr = __in_29bit_mode() ?
+	       (void *)CAC_ADDR((unsigned long)vaddr) : vaddr;
 
 	switch (direction) {
 	case DMA_FROM_DEVICE:		/* invalidate only */
-		__flush_invalidate_region(p1addr, size);
+		__flush_invalidate_region(addr, size);
 		break;
 	case DMA_TO_DEVICE:		/* writeback only */
-		__flush_wback_region(p1addr, size);
+		__flush_wback_region(addr, size);
 		break;
 	case DMA_BIDIRECTIONAL:		/* writeback and invalidate */
-		__flush_purge_region(p1addr, size);
+		__flush_purge_region(addr, size);
 		break;
 	default:
 		BUG();