1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/*
* Copyright (c) 2007 NVIDIA, Corporation
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "g80_type.h"
#include "g80_dma.h"
void G80DmaKickoff(G80Ptr pNv)
{
if(pNv->dmaCurrent != pNv->dmaPut) {
pNv->dmaPut = pNv->dmaCurrent;
pNv->reg[0x00c02040/4] = pNv->dmaPut << 2;
}
}
void G80DmaWait(G80Ptr pNv, int size)
{
CARD32 dmaGet;
size++;
while(pNv->dmaFree < size) {
dmaGet = pNv->reg[0x00c02044/4] >> 2;
if(pNv->dmaPut >= dmaGet) {
pNv->dmaFree = pNv->dmaMax - pNv->dmaCurrent;
if(pNv->dmaFree < size) {
G80DmaNext(pNv, 0x20000000);
if(dmaGet <= SKIPS) {
if(pNv->dmaPut <= SKIPS) /* corner case - will be idle */
pNv->reg[0x00c02040/4] = (SKIPS + 1) << 2;
do { dmaGet = pNv->reg[0x00c02044/4] >> 2; }
while(dmaGet <= SKIPS);
}
pNv->reg[0x00c02040/4] = SKIPS << 2;
pNv->dmaCurrent = pNv->dmaPut = SKIPS;
pNv->dmaFree = dmaGet - (SKIPS + 1);
}
} else
pNv->dmaFree = dmaGet - pNv->dmaCurrent - 1;
}
}
|
