1/*
2 * Copyright (c) 2011-2017, 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 __GR_ION_ALLOC_H__
31#define __GR_ION_ALLOC_H__
32
33#include <linux/msm_ion.h>
34
35#define FD_INIT -1
36
37namespace gralloc1 {
38
39enum {
40  CACHE_CLEAN = 0x1,
41  CACHE_INVALIDATE,
42  CACHE_CLEAN_AND_INVALIDATE,
43};
44
45struct AllocData {
46  void *base = NULL;
47  int fd = -1;
48  int ion_handle = -1;
49  unsigned int offset = 0;
50  unsigned int size = 0;
51  unsigned int align = 1;
52  uintptr_t handle = 0;
53  bool uncached = false;
54  unsigned int flags = 0x0;
55  unsigned int heap_id = 0x0;
56  unsigned int alloc_type = 0x0;
57};
58
59class IonAlloc {
60 public:
61  IonAlloc() { ion_dev_fd_ = FD_INIT; }
62
63  ~IonAlloc() { CloseIonDevice(); }
64
65  bool Init();
66  int AllocBuffer(AllocData *data);
67  int FreeBuffer(void *base, unsigned int size, unsigned int offset, int fd, int ion_handle);
68  int MapBuffer(void **base, unsigned int size, unsigned int offset, int fd);
69  int ImportBuffer(int fd);
70  int UnmapBuffer(void *base, unsigned int size, unsigned int offset);
71  int CleanBuffer(void *base, unsigned int size, unsigned int offset, int handle, int op);
72
73 private:
74  const char *kIonDevice = "/dev/ion";
75
76  int OpenIonDevice();
77  void CloseIonDevice();
78
79  int ion_dev_fd_;
80};
81
82}  // namespace gralloc1
83
84#endif  // __GR_ION_ALLOC_H__
85