+/* DMA mapping. Nothing tricky here, just virt_to_phys */
+
#ifndef _ASM_CRIS_DMA_MAPPING_H
#define _ASM_CRIS_DMA_MAPPING_H
-#include "scatterlist.h"
+#include <linux/mm.h>
+#include <linux/kernel.h>
-static inline int
-dma_supported(struct device *dev, u64 mask)
-{
- BUG();
- return 0;
-}
+#include <asm/cache.h>
+#include <asm/io.h>
+#include <asm/scatterlist.h>
-static inline int
-dma_set_mask(struct device *dev, u64 dma_mask)
-{
- BUG();
- return 1;
-}
+#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)
+#ifdef CONFIG_PCI
+void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flag);
+
+void dma_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle);
+#else
static inline void *
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
- int flag)
+ gfp_t flag)
{
- BUG();
- return NULL;
+ BUG();
+ return NULL;
}
static inline void
dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
- dma_addr_t dma_handle)
+ dma_addr_t dma_handle)
{
- BUG();
+ BUG();
}
-
+#endif
static inline dma_addr_t
-dma_map_single(struct device *dev, void *cpu_addr, size_t size,
+dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction direction)
{
- BUG();
- return 0;
+ BUG_ON(direction == DMA_NONE);
+ return virt_to_phys(ptr);
}
static inline void
dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction direction)
{
- BUG();
+ BUG_ON(direction == DMA_NONE);
+}
+
+static inline int
+dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+ enum dma_data_direction direction)
+{
+ printk("Map sg\n");
+ return nents;
}
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)
+dma_map_page(struct device *dev, struct page *page, unsigned long offset,
+ size_t size, enum dma_data_direction direction)
{
- BUG();
- return 0;
+ BUG_ON(direction == DMA_NONE);
+ return page_to_phys(page) + offset;
}
static inline void
dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
enum dma_data_direction direction)
{
- BUG();
+ BUG_ON(direction == DMA_NONE);
}
-static inline int
-dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
- enum dma_data_direction direction)
-{
- BUG();
- return 1;
-}
static inline void
dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
enum dma_data_direction direction)
{
- BUG();
+ BUG_ON(direction == DMA_NONE);
}
static inline void
-dma_sync_single(struct device *dev, dma_addr_t dma_handle, size_t size,
- enum dma_data_direction direction)
+dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction direction)
{
- BUG();
}
static inline void
-dma_sync_sg(struct device *dev, struct scatterlist *sg, int nelems,
- enum dma_data_direction direction)
+dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction direction)
{
- BUG();
}
-/* Now for the API extensions over the pci_ one */
+static inline void
+dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+ unsigned long offset, size_t size,
+ enum dma_data_direction direction)
+{
+}
-#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 void
+dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
+ unsigned long offset, size_t size,
+ enum dma_data_direction direction)
+{
+}
-static inline int
-dma_get_cache_alignment(void)
+static inline void
+dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+ enum dma_data_direction direction)
{
- /* no easy way to get cache size on all processors, so return
- * the maximum possible, to be safe */
- return (1 << L1_CACHE_SHIFT_MAX);
}
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)
+dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
+ enum dma_data_direction direction)
+{
+}
+
+static inline int
+dma_mapping_error(dma_addr_t dma_addr)
+{
+ return 0;
+}
+
+static inline int
+dma_supported(struct device *dev, u64 mask)
+{
+ /*
+ * we fall back to GFP_DMA when the mask isn't all 1s,
+ * so we can't guarantee allocations that must be
+ * within a tighter range than GFP_DMA..
+ */
+ if(mask < 0x00ffffff)
+ return 0;
+
+ return 1;
+}
+
+static inline int
+dma_set_mask(struct device *dev, u64 mask)
+{
+ if(!dev->dma_mask || !dma_supported(dev, mask))
+ return -EIO;
+
+ *dev->dma_mask = mask;
+
+ return 0;
+}
+
+static inline int
+dma_get_cache_alignment(void)
{
- BUG();
+ return (1 << INTERNODE_CACHE_SHIFT);
}
+#define dma_is_consistent(d) (1)
+
static inline void
dma_cache_sync(void *vaddr, size_t size,
enum dma_data_direction direction)
{
- BUG();
}
-#endif
+#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
+extern int
+dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+ dma_addr_t device_addr, size_t size, int flags);
+
+extern void
+dma_release_declared_memory(struct device *dev);
+extern void *
+dma_mark_declared_memory_occupied(struct device *dev,
+ dma_addr_t device_addr, size_t size);
+
+#endif
git://git.onelab.eu / linux-2.6.git / blobdiff