1 files changed, 33 insertions, 95 deletions

diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index d3c33fc5b1c2..b2ce014401b5 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -10,6 +10,7 @@
  * for more details.
  */
 #include <linux/mm.h>
+#include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <asm/cacheflush.h>
 #include <asm/addrspace.h>
@@ -27,21 +28,10 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
                            dma_addr_t *dma_handle, gfp_t gfp)
 {
         void *ret, *ret_nocache;
-        struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
         int order = get_order(size);
 
-        if (mem) {
-                int page = bitmap_find_free_region(mem->bitmap, mem->size,
-                                                     order);
-                if (page >= 0) {
-                        *dma_handle = mem->device_base + (page << PAGE_SHIFT);
-                        ret = mem->virt_base + (page << PAGE_SHIFT);
-                        memset(ret, 0, size);
-                        return ret;
-                }
-                if (mem->flags & DMA_MEMORY_EXCLUSIVE)
-                        return NULL;
-        }
+        if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
+                return ret;
 
         ret = (void *)__get_free_pages(gfp, order);
         if (!ret)
@@ -71,11 +61,7 @@ void dma_free_coherent(struct device *dev, size_t size,
         struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
         int order = get_order(size);
 
-        if (mem && vaddr >= mem->virt_base && vaddr < (mem->virt_base + (mem->size << PAGE_SHIFT))) {
-                int page = (vaddr - mem->virt_base) >> PAGE_SHIFT;
-
-                bitmap_release_region(mem->bitmap, page, order);
-        } else {
+        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);
@@ -84,83 +70,6 @@ void dma_free_coherent(struct device *dev, size_t size,
 }
 EXPORT_SYMBOL(dma_free_coherent);
 
-int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
-                                dma_addr_t device_addr, size_t size, int flags)
-{
-        void __iomem *mem_base = NULL;
-        int pages = size >> PAGE_SHIFT;
-        int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
-
-        if ((flags & (DMA_MEMORY_MAP | DMA_MEMORY_IO)) == 0)
-                goto out;
-        if (!size)
-                goto out;
-        if (dev->dma_mem)
-                goto out;
-
-        /* FIXME: this routine just ignores DMA_MEMORY_INCLUDES_CHILDREN */
-
-        mem_base = ioremap_nocache(bus_addr, size);
-        if (!mem_base)
-                goto out;
-
-        dev->dma_mem = kmalloc(sizeof(struct dma_coherent_mem), GFP_KERNEL);
-        if (!dev->dma_mem)
-                goto out;
-        dev->dma_mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
-        if (!dev->dma_mem->bitmap)
-                goto free1_out;
-
-        dev->dma_mem->virt_base = mem_base;
-        dev->dma_mem->device_base = device_addr;
-        dev->dma_mem->size = pages;
-        dev->dma_mem->flags = flags;
-
-        if (flags & DMA_MEMORY_MAP)
-                return DMA_MEMORY_MAP;
-
-        return DMA_MEMORY_IO;
-
- free1_out:
-        kfree(dev->dma_mem);
- out:
-        if (mem_base)
-                iounmap(mem_base);
-        return 0;
-}
-EXPORT_SYMBOL(dma_declare_coherent_memory);
-
-void dma_release_declared_memory(struct device *dev)
-{
-        struct dma_coherent_mem *mem = dev->dma_mem;
-
-        if (!mem)
-                return;
-        dev->dma_mem = NULL;
-        iounmap(mem->virt_base);
-        kfree(mem->bitmap);
-        kfree(mem);
-}
-EXPORT_SYMBOL(dma_release_declared_memory);
-
-void *dma_mark_declared_memory_occupied(struct device *dev,
-                                        dma_addr_t device_addr, size_t size)
-{
-        struct dma_coherent_mem *mem = dev->dma_mem;
-        int pages = (size + (device_addr & ~PAGE_MASK) + PAGE_SIZE - 1) >> PAGE_SHIFT;
-        int pos, err;
-
-        if (!mem)
-                return ERR_PTR(-EINVAL);
-
-        pos = (device_addr - mem->device_base) >> PAGE_SHIFT;
-        err = bitmap_allocate_region(mem->bitmap, pos, get_order(pages));
-        if (err != 0)
-                return ERR_PTR(err);
-        return mem->virt_base + (pos << PAGE_SHIFT);
-}
-EXPORT_SYMBOL(dma_mark_declared_memory_occupied);
-
 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
                     enum dma_data_direction direction)
 {
@@ -185,3 +94,32 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
         }
 }
 EXPORT_SYMBOL(dma_cache_sync);
+
+int platform_resource_setup_memory(struct platform_device *pdev,
+                                   char *name, unsigned long memsize)
+{
+        struct resource *r;
+        dma_addr_t dma_handle;
+        void *buf;
+
+        r = pdev->resource + pdev->num_resources - 1;
+        if (r->flags) {
+                pr_warning("%s: unable to find empty space for resource\n",
+                        name);
+                return -EINVAL;
+        }
+
+        buf = dma_alloc_coherent(NULL, memsize, &dma_handle, GFP_KERNEL);
+        if (!buf) {
+                pr_warning("%s: unable to allocate memory\n", name);
+                return -ENOMEM;
+        }
+
+        memset(buf, 0, memsize);
+
+        r->flags = IORESOURCE_MEM;
+        r->start = dma_handle;
+        r->end = r->start + memsize - 1;
+        r->name = name;
+        return 0;
+}