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drm/nvc0: backup bar3 channel on suspend

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2010-08-04 22:48:34 +10:00
parent b715d64028
commit 147cad0936
1 changed files with 22 additions and 0 deletions
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22
drivers/gpu/drm/nouveau/nvc0_instmem.c
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@ -141,12 +141,34 @@ nvc0_instmem_flush(struct drm_device *dev)
int
nvc0_instmem_suspend(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
int i;
dev_priv->susres.ramin_copy = vmalloc(65536);
if (!dev_priv->susres.ramin_copy)
return -ENOMEM;
for (i = 0x700000; i < 0x710000; i += 4)
dev_priv->susres.ramin_copy[i/4] = nv_rd32(dev, i);
return 0;
}
void
nvc0_instmem_resume(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
u64 chan;
int i;
chan = dev_priv->vram_size - dev_priv->ramin_rsvd_vram;
nv_wr32(dev, 0x001700, chan >> 16);
for (i = 0x700000; i < 0x710000; i += 4)
nv_wr32(dev, i, dev_priv->susres.ramin_copy[i/4]);
vfree(dev_priv->susres.ramin_copy);
dev_priv->susres.ramin_copy = NULL;
nv_wr32(dev, 0x001714, 0xc0000000 | (chan >> 12));
}
int