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1 /*
2  * Copyright (C) 2010-2011 Chia-I Wu <olvaffe@gmail.com>
3  * Copyright (C) 2010-2011 LunarG Inc.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be included
13  * in all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21  * DEALINGS IN THE SOFTWARE.
22  */
23 
24 #ifndef _GRALLOC_DRM_HANDLE_H_
25 #define _GRALLOC_DRM_HANDLE_H_
26 
27 #include <cutils/log.h>
28 #include <cutils/native_handle.h>
29 #include <system/graphics.h>
30 
31 #ifdef __cplusplus
32 extern "C" {
33 #endif
34 
35 struct gralloc_drm_bo_t;
36 
37 struct gralloc_drm_handle_t {
38 	native_handle_t base;
39 
40 	/* file descriptors */
41 	int prime_fd;
42 
43 	/* integers */
44 	int magic;
45 
46 	int width;
47 	int height;
48 	int format;
49 	int usage;
50 
51 	int name;   /* the name of the bo */
52 	int stride; /* the stride in bytes */
53 
54 	struct gralloc_drm_bo_t *data; /* pointer to struct gralloc_drm_bo_t */
55 
56 	// FIXME: the attributes below should be out-of-line
57 	uint64_t unknown __attribute__((aligned(8)));
58 	int data_owner; /* owner of data (for validation) */
59 };
60 #define GRALLOC_DRM_HANDLE_MAGIC 0x12345678
61 #define GRALLOC_DRM_HANDLE_NUM_FDS 1
62 #define GRALLOC_DRM_HANDLE_NUM_INTS (						\
63 	((sizeof(struct gralloc_drm_handle_t) - sizeof(native_handle_t))/sizeof(int))	\
64 	 - GRALLOC_DRM_HANDLE_NUM_FDS)
65 
gralloc_drm_handle(buffer_handle_t _handle)66 static inline struct gralloc_drm_handle_t *gralloc_drm_handle(buffer_handle_t _handle)
67 {
68 	struct gralloc_drm_handle_t *handle =
69 		(struct gralloc_drm_handle_t *) _handle;
70 
71 	if (handle && (handle->base.version != sizeof(handle->base) ||
72 	               handle->base.numInts != GRALLOC_DRM_HANDLE_NUM_INTS ||
73 	               handle->base.numFds != GRALLOC_DRM_HANDLE_NUM_FDS ||
74 	               handle->magic != GRALLOC_DRM_HANDLE_MAGIC)) {
75 		ALOGE("invalid handle: version=%d, numInts=%d, numFds=%d, magic=%x",
76 			handle->base.version, handle->base.numInts,
77 			handle->base.numFds, handle->magic);
78 		handle = NULL;
79 	}
80 
81 	return handle;
82 }
83 
84 /*
85  * The functions supported by gralloc_drm's temporary private API are listed
86  * below. Use of these functions is highly discouraged and should only be
87  * reserved for cases where no alternative to get same information (such as
88  * querying ANativeWindow) exists.
89  */
90 enum {
91   GRALLOC_DRM_GET_STRIDE,
92   GRALLOC_DRM_GET_FORMAT,
93   GRALLOC_DRM_GET_DIMENSIONS,
94   GRALLOC_DRM_GET_BACKING_STORE,
95 };
96 
97 #ifdef __cplusplus
98 }
99 #endif
100 #endif /* _GRALLOC_DRM_HANDLE_H_ */
101