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
13static void *dma_alloc(struct device *dev, size_t size,
14		       dma_addr_t *dma_handle, gfp_t gfp,
15		       struct dma_attrs *attrs)
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
33static void dma_free(struct device *dev, size_t size,
34		     void *vaddr, dma_addr_t dma_handle,
35		     struct dma_attrs *attrs)
36
37{
38	free_pages((unsigned long)vaddr, get_order(size));
39}
40
41static dma_addr_t map_page(struct device *dev, struct page *page,
42				  unsigned long offset, size_t size,
43				  enum dma_data_direction direction,
44				  struct dma_attrs *attrs)
45{
46	return page_to_phys(page) + offset;
47}
48
49static int map_sg(struct device *dev, struct scatterlist *sgl,
50		  int nents, enum dma_data_direction direction,
51		  struct dma_attrs *attrs)
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
63struct 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};
69EXPORT_SYMBOL(h8300_dma_map_ops);