1 /*
2 * Copyright (c) 2015 François Tigeot
3 * Copyright (c) 2015 Matthew Dillon <dillon@backplane.com>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice unmodified, this list of conditions, and the following
11 * disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #ifndef _ASM_PCI_DMA_COMPAT_H_
29 #define _ASM_PCI_DMA_COMPAT_H_
30
31 #include <vm/vm_page.h>
32
33 static inline dma_addr_t
pci_map_page(struct pci_dev * hwdev,struct page * page,unsigned long offset,size_t size,int direction)34 pci_map_page(struct pci_dev *hwdev, struct page *page,
35 unsigned long offset, size_t size, int direction)
36 {
37 return VM_PAGE_TO_PHYS((struct vm_page *)page) + offset;
38 }
39
40 static inline void
pci_unmap_page(struct pci_dev * hwdev,dma_addr_t dma_address,size_t size,int direction)41 pci_unmap_page(struct pci_dev *hwdev, dma_addr_t dma_address,
42 size_t size, int direction)
43 {
44 }
45
46 static inline int
pci_dma_mapping_error(struct pci_dev * hwdev,dma_addr_t dma_address)47 pci_dma_mapping_error(struct pci_dev *hwdev, dma_addr_t dma_address)
48 {
49 return (dma_address == 0);
50 }
51
52 #endif /* _ASM_PCI_DMA_COMPAT_H_ */
53