1 /*
2  * Copyright (c) 2011-2014, 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 
37 namespace gralloc {
38 
39 class 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                             size_t offset, int fd);
46 
47     virtual int map_buffer(void **pBase, size_t size,
48                            size_t offset, int fd);
49 
50     virtual int unmap_buffer(void *base, size_t size,
51                              size_t offset);
52 
53     virtual int clean_buffer(void*base, size_t size,
54                              size_t offset, int fd, int op);
55 
IonAlloc()56     IonAlloc() { mIonFd = FD_INIT; }
57 
~IonAlloc()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