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  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
  19.  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20.  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  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 *
  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.