1 /*
2 * Copyright (c) 2015-2016, 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 
31 #ifndef __HWC_BUFFER_ALLOCATOR_H__
32 #define __HWC_BUFFER_ALLOCATOR_H__
33 
34 #include <sys/mman.h>
35 #include <fcntl.h>
36 
37 namespace gralloc {
38 
39 class IAllocController;
40 
41 }  // namespace gralloc
42 
43 namespace sdm {
44 
45 class HWCBufferAllocator : public BufferAllocator {
46  public:
47   HWCBufferAllocator();
48 
49   DisplayError AllocateBuffer(BufferInfo *buffer_info);
50   DisplayError FreeBuffer(BufferInfo *buffer_info);
51   uint32_t GetBufferSize(BufferInfo *buffer_info);
52   DisplayError GetAllocatedBufferInfo(const BufferConfig &buffer_config,
53                                       AllocatedBufferInfo *allocated_buffer_info);
54   DisplayError GetBufferLayout(const AllocatedBufferInfo &buf_info,
55                                uint32_t stride[4], uint32_t offset[4],
56                                uint32_t *num_planes);
57   int SetBufferInfo(LayerBufferFormat format, int *target, int *flags);
58 
59  private:
60   struct MetaBufferInfo {
61     int alloc_type;              //!< Specifies allocation type set by the buffer allocator.
62     void *base_addr;             //!< Specifies the base address of the allocated output buffer.
63   };
64 
65   gralloc::IAllocController *alloc_controller_;
66 };
67 
68 }  // namespace sdm
69 #endif  // __HWC_BUFFER_ALLOCATOR_H__
70 
71