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 * Copyright (C) 2000  Ani Joshi <ajoshi@unixbox.com>
7 * Copyright (C) 2000, 2001, 06  Ralf Baechle <ralf@linux-mips.org>
8 * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
9 */
10
11#include <linux/types.h>
12#include <linux/dma-mapping.h>
13#include <linux/mm.h>
14#include <linux/module.h>
15#include <linux/string.h>
16
17#include <asm/cache.h>
18#include <asm/io.h>
19
20#include <dma-coherence.h>
21
22#include <linux/pci.h>
23
24dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,
25	struct page *page, unsigned long offset, int direction)
26{
27	struct device *dev = &pdev->dev;
28
29	BUG_ON(direction == DMA_NONE);
30
31	if (!plat_device_is_coherent(dev)) {
32		unsigned long addr;
33
34		addr = (unsigned long) page_address(page) + offset;
35		dma_cache_wback_inv(addr, PAGE_SIZE);
36	}
37
38	return plat_map_dma_mem_page(dev, page) + offset;
39}
40
41EXPORT_SYMBOL(pci_dac_page_to_dma);
42
43struct page *pci_dac_dma_to_page(struct pci_dev *pdev,
44	dma64_addr_t dma_addr)
45{
46	return pfn_to_page(plat_dma_addr_to_phys(dma_addr) >> PAGE_SHIFT);
47}
48
49EXPORT_SYMBOL(pci_dac_dma_to_page);
50
51unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,
52	dma64_addr_t dma_addr)
53{
54	return dma_addr & ~PAGE_MASK;
55}
56
57EXPORT_SYMBOL(pci_dac_dma_to_offset);
58
59void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,
60	dma64_addr_t dma_addr, size_t len, int direction)
61{
62	BUG_ON(direction == PCI_DMA_NONE);
63
64	if (!plat_device_is_coherent(&pdev->dev))
65		dma_cache_wback_inv(dma_addr + PAGE_OFFSET, len);
66}
67
68EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu);
69
70void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,
71	dma64_addr_t dma_addr, size_t len, int direction)
72{
73	BUG_ON(direction == PCI_DMA_NONE);
74
75	if (!plat_device_is_coherent(&pdev->dev))
76		dma_cache_wback_inv(dma_addr + PAGE_OFFSET, len);
77}
78
79EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device);
80