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/**********************************************************
* Copyright 2007-2009 VMware, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
**********************************************************/
/*
* svga3d_caps.h --
*
* Definitions for SVGA3D hardware capabilities. Capabilities
* are used to query for optional rendering features during
* driver initialization. The capability data is stored as very
* basic key/value dictionary within the "FIFO register" memory
* area at the beginning of BAR2.
*
* Note that these definitions are only for 3D capabilities.
* The SVGA device also has "device capabilities" and "FIFO
* capabilities", which are non-3D-specific and are stored as
* bitfields rather than key/value pairs.
*/
#ifndef _SVGA3D_CAPS_H_
#define _SVGA3D_CAPS_H_
#define SVGA_FIFO_3D_CAPS_SIZE (SVGA_FIFO_3D_CAPS_LAST - \
SVGA_FIFO_3D_CAPS + 1)
/*
* SVGA3dCapsRecordType
*
* Record types that can be found in the caps block.
* Related record types are grouped together numerically so that
* SVGA3dCaps_FindRecord() can be applied on a range of record
* types.
*/
typedef enum {
SVGA3DCAPS_RECORD_UNKNOWN = 0,
SVGA3DCAPS_RECORD_DEVCAPS_MIN = 0x100,
SVGA3DCAPS_RECORD_DEVCAPS = 0x100,
SVGA3DCAPS_RECORD_DEVCAPS_MAX = 0x1ff,
} SVGA3dCapsRecordType;
/*
* SVGA3dCapsRecordHeader
*
* Header field leading each caps block record. Contains the offset (in
* register words, NOT bytes) to the next caps block record (or the end
* of caps block records which will be a zero word) and the record type
* as defined above.
*/
typedef
struct SVGA3dCapsRecordHeader {
uint32 length;
SVGA3dCapsRecordType type;
}
SVGA3dCapsRecordHeader;
/*
* SVGA3dCapsRecord
*
* Caps block record; "data" is a placeholder for the actual data structure
* contained within the record; for example a record containing a FOOBAR
* structure would be of size "sizeof(SVGA3dCapsRecordHeader) +
* sizeof(FOOBAR)".
*/
typedef
struct SVGA3dCapsRecord {
SVGA3dCapsRecordHeader header;
uint32 data[1];
}
SVGA3dCapsRecord;
typedef uint32 SVGA3dCapPair[2];
/*
*----------------------------------------------------------------------
*
* SVGA3dCaps_FindRecord
*
* Finds the record with the highest-valued type within the given range
* in the caps block.
*
* Result: pointer to found record, or NULL if not found.
*
*----------------------------------------------------------------------
*/
static INLINE SVGA3dCapsRecord *
SVGA3dCaps_FindRecord(const uint32 *capsBlock,
SVGA3dCapsRecordType recordTypeMin,
SVGA3dCapsRecordType recordTypeMax)
{
SVGA3dCapsRecord *record, *found = NULL;
uint32 offset;
/*
* Search linearly through the caps block records for the specified type.
*/
for (offset = 0; capsBlock[offset] != 0; offset += capsBlock[offset]) {
record = (SVGA3dCapsRecord *) (capsBlock + offset);
if ((record->header.type >= recordTypeMin) &&
(record->header.type <= recordTypeMax) &&
(!found || (record->header.type > found->header.type))) {
found = record;
}
}
return found;
}
#endif // _SVGA3D_CAPS_H_
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