diff options
Diffstat (limited to 'arch/m68k/kernel/dma_no.c')
-rw-r--r-- | arch/m68k/kernel/dma_no.c | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/arch/m68k/kernel/dma_no.c b/arch/m68k/kernel/dma_no.c deleted file mode 100644 index f1dc3fc71bc..00000000000 --- a/arch/m68k/kernel/dma_no.c +++ /dev/null @@ -1,75 +0,0 @@ -/* - * Dynamic DMA mapping support. - * - * We never have any address translations to worry about, so this - * is just alloc/free. - */ - -#include <linux/types.h> -#include <linux/gfp.h> -#include <linux/mm.h> -#include <linux/device.h> -#include <linux/dma-mapping.h> -#include <linux/export.h> -#include <asm/cacheflush.h> - -void *dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp) -{ - 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; -} - -void dma_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle) -{ - free_pages((unsigned long)vaddr, get_order(size)); -} - -void dma_sync_single_for_device(struct device *dev, dma_addr_t handle, - size_t size, enum dma_data_direction dir) -{ - switch (dir) { - case DMA_TO_DEVICE: - flush_dcache_range(handle, size); - break; - case DMA_FROM_DEVICE: - /* Should be clear already */ - break; - default: - if (printk_ratelimit()) - printk("dma_sync_single_for_device: unsupported dir %u\n", dir); - break; - } -} - -EXPORT_SYMBOL(dma_sync_single_for_device); -dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size, - enum dma_data_direction dir) -{ - dma_addr_t handle = virt_to_phys(addr); - flush_dcache_range(handle, size); - return handle; -} -EXPORT_SYMBOL(dma_map_single); - -dma_addr_t dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction dir) -{ - dma_addr_t handle = page_to_phys(page) + offset; - dma_sync_single_for_device(dev, handle, size, dir); - return handle; -} -EXPORT_SYMBOL(dma_map_page); |