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
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
#include <linux/module.h>
#include "nouveau_drm.h"
#include "nouveau_agp.h"
#include "nouveau_reg.h"
#if __OS_HAS_AGP
MODULE_PARM_DESC(agpmode, "AGP mode (0 to disable AGP)");
static int nouveau_agpmode = -1;
module_param_named(agpmode, nouveau_agpmode, int, 0400);
struct nouveau_agpmode_quirk {
u16 hostbridge_vendor;
u16 hostbridge_device;
u16 chip_vendor;
u16 chip_device;
int mode;
};
static struct nouveau_agpmode_quirk nouveau_agpmode_quirk_list[] = {
/* VIA Apollo PRO133x / GeForce FX 5600 Ultra, max agpmode 2, fdo #20341 */
{ PCI_VENDOR_ID_VIA, 0x0691, PCI_VENDOR_ID_NVIDIA, 0x0311, 2 },
{},
};
static unsigned long
get_agp_mode(struct nouveau_drm *drm, const struct drm_agp_info *info)
{
struct nvif_device *device = &drm->device;
struct nouveau_agpmode_quirk *quirk = nouveau_agpmode_quirk_list;
int agpmode = nouveau_agpmode;
unsigned long mode = info->mode;
/*
* FW seems to be broken on nv18, it makes the card lock up
* randomly.
*/
if (device->info.chipset == 0x18)
mode &= ~PCI_AGP_COMMAND_FW;
/*
* Go through the quirks list and adjust the agpmode accordingly.
*/
while (agpmode == -1 && quirk->hostbridge_vendor) {
if (info->id_vendor == quirk->hostbridge_vendor &&
info->id_device == quirk->hostbridge_device &&
nvxx_device(device)->pdev->vendor == quirk->chip_vendor &&
nvxx_device(device)->pdev->device == quirk->chip_device) {
agpmode = quirk->mode;
NV_INFO(drm, "Forcing agp mode to %dX. Use agpmode to override.\n",
agpmode);
break;
}
++quirk;
}
/*
* AGP mode set in the command line.
*/
if (agpmode > 0) {
bool agpv3 = mode & 0x8;
int rate = agpv3 ? agpmode / 4 : agpmode;
mode = (mode & ~0x7) | (rate & 0x7);
}
return mode;
}
static bool
nouveau_agp_enabled(struct nouveau_drm *drm)
{
struct drm_device *dev = drm->dev;
if (!dev->pdev || !drm_pci_device_is_agp(dev) || !dev->agp)
return false;
if (drm->agp.stat == UNKNOWN) {
if (!nouveau_agpmode)
return false;
#ifdef __powerpc__
/* Disable AGP by default on all PowerPC machines for
* now -- At least some UniNorth-2 AGP bridges are
* known to be broken: DMA from the host to the card
* works just fine, but writeback from the card to the
* host goes straight to memory untranslated bypassing
* the GATT somehow, making them quite painful to deal
* with...
*/
if (nouveau_agpmode == -1)
return false;
#endif
return true;
}
return (drm->agp.stat == ENABLED);
}
#endif
void
nouveau_agp_reset(struct nouveau_drm *drm)
{
#if __OS_HAS_AGP
struct nvif_object *device = &drm->device.object;
struct drm_device *dev = drm->dev;
u32 save[2];
int ret;
if (!nouveau_agp_enabled(drm))
return;
/* First of all, disable fast writes, otherwise if it's
* already enabled in the AGP bridge and we disable the card's
* AGP controller we might be locking ourselves out of it. */
if ((nvif_rd32(device, NV04_PBUS_PCI_NV_19) |
dev->agp->mode) & PCI_AGP_COMMAND_FW) {
struct drm_agp_info info;
struct drm_agp_mode mode;
ret = drm_agp_info(dev, &info);
if (ret)
return;
mode.mode = get_agp_mode(drm, &info);
mode.mode &= ~PCI_AGP_COMMAND_FW;
ret = drm_agp_enable(dev, mode);
if (ret)
return;
}
/* clear busmaster bit, and disable AGP */
save[0] = nvif_mask(device, NV04_PBUS_PCI_NV_1, 0x00000004, 0x00000000);
nvif_wr32(device, NV04_PBUS_PCI_NV_19, 0);
/* reset PGRAPH, PFIFO and PTIMER */
save[1] = nvif_mask(device, 0x000200, 0x00011100, 0x00000000);
nvif_mask(device, 0x000200, 0x00011100, save[1]);
/* and restore bustmaster bit (gives effect of resetting AGP) */
nvif_wr32(device, NV04_PBUS_PCI_NV_1, save[0]);
#endif
}
void
nouveau_agp_init(struct nouveau_drm *drm)
{
#if __OS_HAS_AGP
struct drm_device *dev = drm->dev;
struct drm_agp_info info;
struct drm_agp_mode mode;
int ret;
if (!nouveau_agp_enabled(drm))
return;
drm->agp.stat = DISABLE;
ret = drm_agp_acquire(dev);
if (ret) {
NV_ERROR(drm, "unable to acquire AGP: %d\n", ret);
return;
}
ret = drm_agp_info(dev, &info);
if (ret) {
NV_ERROR(drm, "unable to get AGP info: %d\n", ret);
return;
}
/* see agp.h for the AGPSTAT_* modes available */
mode.mode = get_agp_mode(drm, &info);
ret = drm_agp_enable(dev, mode);
if (ret) {
NV_ERROR(drm, "unable to enable AGP: %d\n", ret);
return;
}
drm->agp.stat = ENABLED;
drm->agp.base = info.aperture_base;
drm->agp.size = info.aperture_size;
#endif
}
void
nouveau_agp_fini(struct nouveau_drm *drm)
{
#if __OS_HAS_AGP
struct drm_device *dev = drm->dev;
if (dev->agp && dev->agp->acquired)
drm_agp_release(dev);
#endif
}
|
