1 /*
2 * Copyright (c) 2020 François Tigeot <ftigeot@wolfpond.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #ifndef _LINUX_PCI_DMA_COMPAT_H
28 #define _LINUX_PCI_DMA_COMPAT_H
29
30 #include <linux/dma-mapping.h>
31
32 static inline void *
pci_alloc_consistent(struct pci_dev * pdev,size_t size,dma_addr_t * dma_handle)33 pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_handle)
34 {
35 /* Our dma_alloc_coherent() implementation does not support a NULL pdev */
36 BUG_ON(pdev == NULL);
37
38 return dma_alloc_coherent(&pdev->dev, size, dma_handle, GFP_ATOMIC);
39 }
40
41 static inline void
pci_free_consistent(struct pci_dev * pdev,size_t size,void * vaddr,dma_addr_t dma_handle)42 pci_free_consistent(struct pci_dev *pdev,
43 size_t size, void *vaddr, dma_addr_t dma_handle)
44 {
45 dma_free_coherent(&pdev->dev, size, vaddr, dma_handle);
46 }
47
48 #endif /* _LINUX_PCI_DMA_COMPAT_H */
49