1/*
2 * Copyright (C) Thomas Hellstrom (2005)
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
13 * 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 NON-INFRINGEMENT. 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 VIA_DMABUFFER_H
25#define VIA_DMABUFFER_H
26
27#include "via_3d_reg.h"
28
29typedef struct _ViaCommandBuffer
30{
31    ScrnInfoPtr pScrn;
32    CARD32 *buf;
33    CARD32 waitFlags;
34    unsigned pos;
35    unsigned bufSize;
36    int mode;
37    int header_start;
38    int rindex;
39    Bool has3dState;
40    void (*flushFunc) (struct _ViaCommandBuffer * cb);
41} ViaCommandBuffer;
42
43#define VIA_DMASIZE 16384
44
45#define H1_ADDR(val) (((val) >> 2) | 0xF0000000)
46#define WAITFLAGS(flags)			\
47    (cb)->waitFlags |= (flags)
48
49#define BEGIN_RING(size)					\
50    do {								\
51	if (cb->flushFunc && (cb->pos > (cb->bufSize-(size)))) {	\
52	    cb->flushFunc(cb);					\
53	}								\
54    } while(0)
55
56#define BEGIN_H2(paraType, h2size)			\
57  do{							\
58    BEGIN_RING((h2size)+6);				\
59    if (cb->mode == 2 && (paraType) == cb->rindex)	\
60      break;						\
61    if (cb->pos & 1)					\
62      OUT_RING(HC_DUMMY);				\
63    cb->header_start = cb->pos;				\
64    cb->rindex = paraType;				\
65    cb->mode = 2;					\
66    OUT_RING(HALCYON_HEADER2);				\
67    OUT_RING((paraType) << 16);						\
68    if (!cb->has3dState && ((paraType) != HC_ParaType_CmdVdata)) {	\
69      cb->has3dState = TRUE;						\
70    }									\
71  } while(0);
72
73#define OUT_RING(val) do{	\
74	(cb)->buf[(cb)->pos++] = (val);	\
75    } while(0);
76
77#define OUT_RING_QW(val1, val2)			\
78    do {						\
79	(cb)->buf[(cb)->pos++] = (val1);		\
80	(cb)->buf[(cb)->pos++] = (val2);		\
81    } while (0)
82
83#define ADVANCE_RING \
84  cb->flushFunc(cb)
85
86#define RING_VARS \
87  ViaCommandBuffer *cb = &pVia->cb
88
89#define OUT_RING_H1(val1, val2) \
90  OUT_RING_QW(H1_ADDR(val1), val2)
91
92#define OUT_RING_SubA(val1, val2) \
93  OUT_RING(((val1) << HC_SubA_SHIFT) | ((val2) & HC_Para_MASK))
94
95#endif
96