[deliverable/linux.git] / arch / h8300 / kernel / dma.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */

#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <linux/scatterlist.h>
#include <linux/module.h>
#include <asm/pgalloc.h>

static void *dma_alloc(struct device *dev, size_t size,
		       dma_addr_t *dma_handle, gfp_t gfp,
		       unsigned long attrs)
{
	void *ret;

	/* ignore region specifiers */
	gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);

	if (dev == NULL || (*dev->dma_mask < 0xffffffff))
		gfp |= GFP_DMA;
	ret = (void *)__get_free_pages(gfp, get_order(size));

	if (ret != NULL) {
		memset(ret, 0, size);
		*dma_handle = virt_to_phys(ret);
	}
	return ret;
}

static void dma_free(struct device *dev, size_t size,
		     void *vaddr, dma_addr_t dma_handle,
		     unsigned long attrs)

{
	free_pages((unsigned long)vaddr, get_order(size));
}

static dma_addr_t map_page(struct device *dev, struct page *page,
				  unsigned long offset, size_t size,
				  enum dma_data_direction direction,
				  unsigned long attrs)
{
	return page_to_phys(page) + offset;
}

static int map_sg(struct device *dev, struct scatterlist *sgl,
		  int nents, enum dma_data_direction direction,
		  unsigned long attrs)
{
	struct scatterlist *sg;
	int i;

	for_each_sg(sgl, sg, nents, i) {
		sg->dma_address = sg_phys(sg);
	}

	return nents;
}

struct dma_map_ops h8300_dma_map_ops = {
	.alloc = dma_alloc,
	.free = dma_free,
	.map_page = map_page,
	.map_sg = map_sg,
};
EXPORT_SYMBOL(h8300_dma_map_ops);
Commit	Line	Data
4e0c2098 YS	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file COPYING in the main directory of this archive
	4	* for more details.
	5	*/
	6
	7	#include <linux/dma-mapping.h>
	8	#include <linux/kernel.h>
	9	#include <linux/scatterlist.h>
	10	#include <linux/module.h>
	11	#include <asm/pgalloc.h>
	12
	13	static void dma_alloc(struct device dev, size_t size,
	14	dma_addr_t *dma_handle, gfp_t gfp,
00085f1e	15	unsigned long attrs)
4e0c2098 YS	16	{
	17	void *ret;
	18
	19	/* ignore region specifiers */
	20	gfp &= ~(__GFP_DMA \| __GFP_HIGHMEM);
	21
	22	if (dev == NULL \|\| (*dev->dma_mask < 0xffffffff))
	23	gfp \|= GFP_DMA;
	24	ret = (void *)__get_free_pages(gfp, get_order(size));
	25
	26	if (ret != NULL) {
	27	memset(ret, 0, size);
	28	*dma_handle = virt_to_phys(ret);
	29	}
	30	return ret;
	31	}
	32
	33	static void dma_free(struct device *dev, size_t size,
	34	void *vaddr, dma_addr_t dma_handle,
00085f1e	35	unsigned long attrs)
4e0c2098 YS	36
	37	{
	38	free_pages((unsigned long)vaddr, get_order(size));
	39	}
	40
	41	static dma_addr_t map_page(struct device dev, struct page page,
	42	unsigned long offset, size_t size,
	43	enum dma_data_direction direction,
00085f1e	44	unsigned long attrs)
4e0c2098 YS	45	{
	46	return page_to_phys(page) + offset;
	47	}
	48
	49	static int map_sg(struct device dev, struct scatterlist sgl,
	50	int nents, enum dma_data_direction direction,
00085f1e	51	unsigned long attrs)
4e0c2098 YS	52	{
	53	struct scatterlist *sg;
	54	int i;
	55
	56	for_each_sg(sgl, sg, nents, i) {
	57	sg->dma_address = sg_phys(sg);
	58	}
	59
	60	return nents;
	61	}
	62
	63	struct dma_map_ops h8300_dma_map_ops = {
	64	.alloc = dma_alloc,
	65	.free = dma_free,
	66	.map_page = map_page,
	67	.map_sg = map_sg,
	68	};
	69	EXPORT_SYMBOL(h8300_dma_map_ops);