1 #include <linux/module.h>
3 #include <core/device.h>
5 #include "nouveau_drm.h"
6 #include "nouveau_agp.h"
7 #include "nouveau_reg.h"
10 MODULE_PARM_DESC(agpmode
, "AGP mode (0 to disable AGP)");
11 static int nouveau_agpmode
= -1;
12 module_param_named(agpmode
, nouveau_agpmode
, int, 0400);
15 get_agp_mode(struct nouveau_drm
*drm
, unsigned long mode
)
17 struct nouveau_device
*device
= nv_device(drm
->device
);
20 * FW seems to be broken on nv18, it makes the card lock up
23 if (device
->chipset
== 0x18)
24 mode
&= ~PCI_AGP_COMMAND_FW
;
27 * AGP mode set in the command line.
29 if (nouveau_agpmode
> 0) {
30 bool agpv3
= mode
& 0x8;
31 int rate
= agpv3
? nouveau_agpmode
/ 4 : nouveau_agpmode
;
33 mode
= (mode
& ~0x7) | (rate
& 0x7);
40 nouveau_agp_enabled(struct nouveau_drm
*drm
)
42 struct drm_device
*dev
= drm
->dev
;
44 if (!drm_pci_device_is_agp(dev
) || !dev
->agp
)
47 if (drm
->agp
.stat
== UNKNOWN
) {
51 /* Disable AGP by default on all PowerPC machines for
52 * now -- At least some UniNorth-2 AGP bridges are
53 * known to be broken: DMA from the host to the card
54 * works just fine, but writeback from the card to the
55 * host goes straight to memory untranslated bypassing
56 * the GATT somehow, making them quite painful to deal
59 if (nouveau_agpmode
== -1)
65 return (drm
->agp
.stat
== ENABLED
);
70 nouveau_agp_reset(struct nouveau_drm
*drm
)
73 struct nouveau_device
*device
= nv_device(drm
->device
);
74 struct drm_device
*dev
= drm
->dev
;
78 if (!nouveau_agp_enabled(drm
))
81 /* First of all, disable fast writes, otherwise if it's
82 * already enabled in the AGP bridge and we disable the card's
83 * AGP controller we might be locking ourselves out of it. */
84 if ((nv_rd32(device
, NV04_PBUS_PCI_NV_19
) |
85 dev
->agp
->mode
) & PCI_AGP_COMMAND_FW
) {
86 struct drm_agp_info info
;
87 struct drm_agp_mode mode
;
89 ret
= drm_agp_info(dev
, &info
);
93 mode
.mode
= get_agp_mode(drm
, info
.mode
);
94 mode
.mode
&= ~PCI_AGP_COMMAND_FW
;
96 ret
= drm_agp_enable(dev
, mode
);
102 /* clear busmaster bit, and disable AGP */
103 save
[0] = nv_mask(device
, NV04_PBUS_PCI_NV_1
, 0x00000004, 0x00000000);
104 nv_wr32(device
, NV04_PBUS_PCI_NV_19
, 0);
106 /* reset PGRAPH, PFIFO and PTIMER */
107 save
[1] = nv_mask(device
, 0x000200, 0x00011100, 0x00000000);
108 nv_mask(device
, 0x000200, 0x00011100, save
[1]);
110 /* and restore bustmaster bit (gives effect of resetting AGP) */
111 nv_wr32(device
, NV04_PBUS_PCI_NV_1
, save
[0]);
116 nouveau_agp_init(struct nouveau_drm
*drm
)
119 struct nouveau_device
*device
= nv_device(drm
->device
);
120 struct drm_device
*dev
= drm
->dev
;
121 struct drm_agp_info info
;
122 struct drm_agp_mode mode
;
125 if (!nouveau_agp_enabled(drm
))
127 drm
->agp
.stat
= DISABLE
;
129 ret
= drm_agp_acquire(dev
);
131 nv_error(device
, "unable to acquire AGP: %d\n", ret
);
135 ret
= drm_agp_info(dev
, &info
);
137 nv_error(device
, "unable to get AGP info: %d\n", ret
);
141 /* see agp.h for the AGPSTAT_* modes available */
142 mode
.mode
= get_agp_mode(drm
, info
.mode
);
144 ret
= drm_agp_enable(dev
, mode
);
146 nv_error(device
, "unable to enable AGP: %d\n", ret
);
150 drm
->agp
.stat
= ENABLED
;
151 drm
->agp
.base
= info
.aperture_base
;
152 drm
->agp
.size
= info
.aperture_size
;
157 nouveau_agp_fini(struct nouveau_drm
*drm
)
160 struct drm_device
*dev
= drm
->dev
;
161 if (dev
->agp
&& dev
->agp
->acquired
)
162 drm_agp_release(dev
);
This page took 0.033782 seconds and 5 git commands to generate.