ia64/linux-2.6.18-xen.hg

annotate arch/m68knommu/kernel/dma.c @ 854:950b9eb27661

usbback: fix urb interval value for interrupt urbs.

Signed-off-by: Noboru Iwamatsu <n_iwamatsu@jp.fujitsu.com>
author Keir Fraser <keir.fraser@citrix.com>
date Mon Apr 06 13:51:20 2009 +0100 (2009-04-06)
parents 831230e53067
children
rev   line source
ian@0 1 /*
ian@0 2 * Dynamic DMA mapping support.
ian@0 3 *
ian@0 4 * We never have any address translations to worry about, so this
ian@0 5 * is just alloc/free.
ian@0 6 */
ian@0 7
ian@0 8 #include <linux/types.h>
ian@0 9 #include <linux/mm.h>
ian@0 10 #include <linux/string.h>
ian@0 11 #include <linux/pci.h>
ian@0 12 #include <asm/io.h>
ian@0 13
ian@0 14 void *dma_alloc_coherent(struct device *dev, size_t size,
ian@0 15 dma_addr_t *dma_handle, int gfp)
ian@0 16 {
ian@0 17 void *ret;
ian@0 18 /* ignore region specifiers */
ian@0 19 gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
ian@0 20
ian@0 21 if (dev == NULL || (*dev->dma_mask < 0xffffffff))
ian@0 22 gfp |= GFP_DMA;
ian@0 23 ret = (void *)__get_free_pages(gfp, get_order(size));
ian@0 24
ian@0 25 if (ret != NULL) {
ian@0 26 memset(ret, 0, size);
ian@0 27 *dma_handle = virt_to_phys(ret);
ian@0 28 }
ian@0 29 return ret;
ian@0 30 }
ian@0 31
ian@0 32 void dma_free_coherent(struct device *dev, size_t size,
ian@0 33 void *vaddr, dma_addr_t dma_handle)
ian@0 34 {
ian@0 35 free_pages((unsigned long)vaddr, get_order(size));
ian@0 36 }