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>
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index 1165161..ef20bba 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -33,15 +33,12 @@
}
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 @@
*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)