1 /**********************************************************
2 * Copyright 2007-2009 VMware, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 **********************************************************/
25
26 /*
27 * svga3d_caps.h --
28 *
29 * Definitions for SVGA3D hardware capabilities. Capabilities
30 * are used to query for optional rendering features during
31 * driver initialization. The capability data is stored as very
32 * basic key/value dictionary within the "FIFO register" memory
33 * area at the beginning of BAR2.
34 *
35 * Note that these definitions are only for 3D capabilities.
36 * The SVGA device also has "device capabilities" and "FIFO
37 * capabilities", which are non-3D-specific and are stored as
38 * bitfields rather than key/value pairs.
39 */
40
41 #ifndef _SVGA3D_CAPS_H_
42 #define _SVGA3D_CAPS_H_
43
44 #define SVGA_FIFO_3D_CAPS_SIZE (SVGA_FIFO_3D_CAPS_LAST - \
45 SVGA_FIFO_3D_CAPS + 1)
46
47
48 /*
49 * SVGA3dCapsRecordType
50 *
51 * Record types that can be found in the caps block.
52 * Related record types are grouped together numerically so that
53 * SVGA3dCaps_FindRecord() can be applied on a range of record
54 * types.
55 */
56
57 typedef enum {
58 SVGA3DCAPS_RECORD_UNKNOWN = 0,
59 SVGA3DCAPS_RECORD_DEVCAPS_MIN = 0x100,
60 SVGA3DCAPS_RECORD_DEVCAPS = 0x100,
61 SVGA3DCAPS_RECORD_DEVCAPS_MAX = 0x1ff,
62 } SVGA3dCapsRecordType;
63
64
65 /*
66 * SVGA3dCapsRecordHeader
67 *
68 * Header field leading each caps block record. Contains the offset (in
69 * register words, NOT bytes) to the next caps block record (or the end
70 * of caps block records which will be a zero word) and the record type
71 * as defined above.
72 */
73
74 typedef
75 struct SVGA3dCapsRecordHeader {
76 uint32 length;
77 SVGA3dCapsRecordType type;
78 }
79 SVGA3dCapsRecordHeader;
80
81
82 /*
83 * SVGA3dCapsRecord
84 *
85 * Caps block record; "data" is a placeholder for the actual data structure
86 * contained within the record; for example a record containing a FOOBAR
87 * structure would be of size "sizeof(SVGA3dCapsRecordHeader) +
88 * sizeof(FOOBAR)".
89 */
90
91 typedef
92 struct SVGA3dCapsRecord {
93 SVGA3dCapsRecordHeader header;
94 uint32 data[1];
95 }
96 SVGA3dCapsRecord;
97
98
99 typedef uint32 SVGA3dCapPair[2];
100
101
102 /*
103 *----------------------------------------------------------------------
104 *
105 * SVGA3dCaps_FindRecord
106 *
107 * Finds the record with the highest-valued type within the given range
108 * in the caps block.
109 *
110 * Result: pointer to found record, or NULL if not found.
111 *
112 *----------------------------------------------------------------------
113 */
114
115 static INLINE SVGA3dCapsRecord *
SVGA3dCaps_FindRecord(const uint32 * capsBlock,SVGA3dCapsRecordType recordTypeMin,SVGA3dCapsRecordType recordTypeMax)116 SVGA3dCaps_FindRecord(const uint32 *capsBlock,
117 SVGA3dCapsRecordType recordTypeMin,
118 SVGA3dCapsRecordType recordTypeMax)
119 {
120 SVGA3dCapsRecord *record, *found = NULL;
121 uint32 offset;
122
123 /*
124 * Search linearly through the caps block records for the specified type.
125 */
126 for (offset = 0; capsBlock[offset] != 0; offset += capsBlock[offset]) {
127 record = (SVGA3dCapsRecord *) (capsBlock + offset);
128 if ((record->header.type >= recordTypeMin) &&
129 (record->header.type <= recordTypeMax) &&
130 (!found || (record->header.type > found->header.type))) {
131 found = record;
132 }
133 }
134
135 return found;
136 }
137
138
139 #endif // _SVGA3D_CAPS_H_
140