sh: Add dma-mapping support for dma_alloc/free_coherent() overrides.

This moves the current dma_alloc/free_coherent() calls to a generic
variant and plugs them in for the nommu default. Other variants can
override the defaults in the dma mapping ops directly.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 5 insertions, 17 deletions

diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index 1165161e472c..ef20bbabefa0 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -33,15 +33,12 @@ static int __init dma_init(void)
 }
 fs_initcall(dma_init);
 
-void *dma_alloc_coherent(struct device *dev, size_t size,
-                           dma_addr_t *dma_handle, gfp_t gfp)
+void *dma_generic_alloc_coherent(struct device *dev, size_t size,
+                                 dma_addr_t *dma_handle, gfp_t gfp)
 {
         void *ret, *ret_nocache;
         int order = get_order(size);
 
-        if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
-                return ret;
-
         ret = (void *)__get_free_pages(gfp, order);
         if (!ret)
                 return NULL;
@@ -63,30 +60,21 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
 
         *dma_handle = virt_to_phys(ret);
 
-        debug_dma_alloc_coherent(dev, size, *dma_handle, ret_nocache);
-
         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)
 {
         int order = get_order(size);
         unsigned long pfn = dma_handle >> PAGE_SHIFT;
         int k;
 
-        WARN_ON(irqs_disabled());       /* for portability */
-
-        if (dma_release_from_coherent(dev, order, vaddr))
-                return;
-
-        debug_dma_free_coherent(dev, size, vaddr, dma_handle);
         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)