Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
[sfrench/cifs-2.6.git] / arch / m68knommu / kernel / dma.c
1 /*
2  * Dynamic DMA mapping support.
3  *
4  * We never have any address translations to worry about, so this
5  * is just alloc/free.
6  */
7
8 #include <linux/types.h>
9 #include <linux/mm.h>
10 #include <linux/string.h>
11 #include <linux/device.h>
12 #include <asm/io.h>
13
14 void *dma_alloc_coherent(struct device *dev, size_t size,
15                            dma_addr_t *dma_handle, int gfp)
16 {
17         void *ret;
18         /* ignore region specifiers */
19         gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
20
21         if (dev == NULL || (*dev->dma_mask < 0xffffffff))
22                 gfp |= GFP_DMA;
23         ret = (void *)__get_free_pages(gfp, get_order(size));
24
25         if (ret != NULL) {
26                 memset(ret, 0, size);
27                 *dma_handle = virt_to_phys(ret);
28         }
29         return ret;
30 }
31
32 void dma_free_coherent(struct device *dev, size_t size,
33                          void *vaddr, dma_addr_t dma_handle)
34 {
35         free_pages((unsigned long)vaddr, get_order(size));
36 }