Jose requested an open-source-friendly version of our svga3d_caps header. This header includes some definitions for interpreting the 3D-specific capability blocks in BAR2.
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Micah Dowty
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68478eab4b
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139
lib/vmware/svga3d_caps.h
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lib/vmware/svga3d_caps.h
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/**********************************************************
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* Copyright 2007-2009 VMware, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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**********************************************************/
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/*
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* svga3d_caps.h --
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*
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* Definitions for SVGA3D hardware capabilities. Capabilities
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* are used to query for optional rendering features during
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* driver initialization. The capability data is stored as very
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* basic key/value dictionary within the "FIFO register" memory
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* area at the beginning of BAR2.
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*
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* Note that these definitions are only for 3D capabilities.
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* The SVGA device also has "device capabilities" and "FIFO
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* capabilities", which are non-3D-specific and are stored as
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* bitfields rather than key/value pairs.
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*/
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#ifndef _SVGA3D_CAPS_H_
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#define _SVGA3D_CAPS_H_
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#define SVGA_FIFO_3D_CAPS_SIZE (SVGA_FIFO_3D_CAPS_LAST - \
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SVGA_FIFO_3D_CAPS + 1)
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/*
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* SVGA3dCapsRecordType
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*
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* Record types that can be found in the caps block.
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* Related record types are grouped together numerically so that
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* SVGA3dCaps_FindRecord() can be applied on a range of record
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* types.
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*/
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typedef enum {
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SVGA3DCAPS_RECORD_UNKNOWN = 0,
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SVGA3DCAPS_RECORD_DEVCAPS_MIN = 0x100,
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SVGA3DCAPS_RECORD_DEVCAPS = 0x100,
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SVGA3DCAPS_RECORD_DEVCAPS_MAX = 0x1ff,
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} SVGA3dCapsRecordType;
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/*
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* SVGA3dCapsRecordHeader
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*
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* Header field leading each caps block record. Contains the offset (in
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* register words, NOT bytes) to the next caps block record (or the end
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* of caps block records which will be a zero word) and the record type
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* as defined above.
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*/
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typedef
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struct SVGA3dCapsRecordHeader {
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uint32 length;
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SVGA3dCapsRecordType type;
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}
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SVGA3dCapsRecordHeader;
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/*
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* SVGA3dCapsRecord
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*
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* Caps block record; "data" is a placeholder for the actual data structure
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* contained within the record; for example a record containing a FOOBAR
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* structure would be of size "sizeof(SVGA3dCapsRecordHeader) +
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* sizeof(FOOBAR)".
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*/
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typedef
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struct SVGA3dCapsRecord {
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SVGA3dCapsRecordHeader header;
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uint32 data[1];
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}
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SVGA3dCapsRecord;
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typedef uint32 SVGA3dCapPair[2];
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/*
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*----------------------------------------------------------------------
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*
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* SVGA3dCaps_FindRecord
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*
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* Finds the record with the highest-valued type within the given range
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* in the caps block.
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*
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* Result: pointer to found record, or NULL if not found.
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*
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*----------------------------------------------------------------------
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*/
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static INLINE SVGA3dCapsRecord *
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SVGA3dCaps_FindRecord(const uint32 *capsBlock,
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SVGA3dCapsRecordType recordTypeMin,
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SVGA3dCapsRecordType recordTypeMax)
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{
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SVGA3dCapsRecord *record, *found = NULL;
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uint32 offset;
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/*
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* Search linearly through the caps block records for the specified type.
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*/
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for (offset = 0; capsBlock[offset] != 0; offset += capsBlock[offset]) {
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record = (SVGA3dCapsRecord *) (capsBlock + offset);
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if ((record->header.type >= recordTypeMin) &&
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(record->header.type <= recordTypeMax) &&
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(!found || (record->header.type > found->header.type))) {
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found = record;
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}
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}
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return found;
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}
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#endif // _SVGA3D_CAPS_H_
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