ia64/linux-2.6.18-xen.hg

view arch/xtensa/kernel/pci-dma.c @ 647:a5bb490065f6

Fix the build after public header sync.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Wed Aug 13 14:01:49 2008 +0100 (2008-08-13)
parents 831230e53067
children
line source
1 /*
2 * arch/xtensa/pci-dma.c
3 *
4 * DMA coherent memory allocation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 *
11 * Copyright (C) 2002 - 2005 Tensilica Inc.
12 *
13 * Based on version for i386.
14 *
15 * Chris Zankel <chris@zankel.net>
16 * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com>
17 */
19 #include <linux/types.h>
20 #include <linux/mm.h>
21 #include <linux/string.h>
22 #include <linux/pci.h>
23 #include <asm/io.h>
24 #include <asm/cacheflush.h>
26 /*
27 * Note: We assume that the full memory space is always mapped to 'kseg'
28 * Otherwise we have to use page attributes (not implemented).
29 */
31 void *
32 dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp)
33 {
34 void *ret;
36 /* ignore region speicifiers */
37 gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
39 if (dev == NULL || (*dev->dma_mask < 0xffffffff))
40 gfp |= GFP_DMA;
41 ret = (void *)__get_free_pages(gfp, get_order(size));
43 if (ret != NULL) {
44 memset(ret, 0, size);
45 *handle = virt_to_bus(ret);
46 }
47 return (void*) BYPASS_ADDR((unsigned long)ret);
48 }
50 void dma_free_coherent(struct device *hwdev, size_t size,
51 void *vaddr, dma_addr_t dma_handle)
52 {
53 free_pages(CACHED_ADDR((unsigned long)vaddr), get_order(size));
54 }
57 void consistent_sync(void *vaddr, size_t size, int direction)
58 {
59 switch (direction) {
60 case PCI_DMA_NONE:
61 BUG();
62 case PCI_DMA_FROMDEVICE: /* invalidate only */
63 __invalidate_dcache_range((unsigned long)vaddr,
64 (unsigned long)size);
65 break;
67 case PCI_DMA_TODEVICE: /* writeback only */
68 case PCI_DMA_BIDIRECTIONAL: /* writeback and invalidate */
69 __flush_invalidate_dcache_range((unsigned long)vaddr,
70 (unsigned long)size);
71 break;
72 }
73 }