ionalloc.h revision b166940edca6e312463461438e2aa66e9852c26a 
1/*
2 * Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
3
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *   * Redistributions of source code must retain the above copyright
8 *     notice, this list of conditions and the following disclaimer.
9 *   * Redistributions in binary form must reproduce the above
10 *     copyright notice, this list of conditions and the following
11 *     disclaimer in the documentation and/or other materials provided
12 *     with the distribution.
13 *   * Neither the name of The Linux Foundation nor the names of its
14 *     contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#ifndef GRALLOC_IONALLOC_H
31#define GRALLOC_IONALLOC_H
32
33#include <linux/msm_ion.h>
34#include "memalloc.h"
35#include "gr.h"
36
37namespace gralloc {
38
39class IonAlloc : public IMemAlloc  {
40
41    public:
42    virtual int alloc_buffer(alloc_data& data);
43
44    virtual int free_buffer(void *base, size_t size,
45                            int offset, int fd);
46
47    virtual int map_buffer(void **pBase, size_t size,
48                           int offset, int fd);
49
50    virtual int unmap_buffer(void *base, size_t size,
51                             int offset);
52
53    virtual int clean_buffer(void*base, size_t size,
54                             int offset, int fd, int op);
55
56    IonAlloc() { mIonFd = FD_INIT; }
57
58    ~IonAlloc() { close_device(); }
59
60    private:
61    int mIonFd;
62
63    int open_device();
64
65    void close_device();
66
67    mutable Locker mLock;
68
69};
70
71}
72
73#endif /* GRALLOC_IONALLOC_H */
74
75