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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/*
* Copyright 2011 Red Hat Inc.
*
* 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*
* Authors: Ben Skeggs
*/
#include "drmP.h"
#include "drm.h"
#include "nouveau_drv.h"
#include "nouveau_drm.h"
struct nvc0_fb_priv {
struct page *r100c10_page;
dma_addr_t r100c10;
};
static void
nvc0_fb_destroy(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
struct nvc0_fb_priv *priv = pfb->priv;
if (priv->r100c10_page) {
pci_unmap_page(dev->pdev, priv->r100c10, PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
__free_page(priv->r100c10_page);
}
kfree(priv);
pfb->priv = NULL;
}
static int
nvc0_fb_create(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
struct nvc0_fb_priv *priv;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
pfb->priv = priv;
priv->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
if (!priv->r100c10_page) {
nvc0_fb_destroy(dev);
return -ENOMEM;
}
priv->r100c10 = pci_map_page(dev->pdev, priv->r100c10_page, 0,
PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(dev->pdev, priv->r100c10)) {
nvc0_fb_destroy(dev);
return -EFAULT;
}
return 0;
}
int
nvc0_fb_init(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nvc0_fb_priv *priv;
int ret;
if (!dev_priv->engine.fb.priv) {
ret = nvc0_fb_create(dev);
if (ret)
return ret;
}
priv = dev_priv->engine.fb.priv;
nv_wr32(dev, 0x100c10, priv->r100c10 >> 8);
return 0;
}
void
nvc0_fb_takedown(struct drm_device *dev)
{
nvc0_fb_destroy(dev);
}
|
