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drm/nvc0: backup bar3 channel on suspend
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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b715d64028
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1 changed files with 22 additions and 0 deletions
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@ -141,12 +141,34 @@ nvc0_instmem_flush(struct drm_device *dev)
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int
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nvc0_instmem_suspend(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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int i;
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dev_priv->susres.ramin_copy = vmalloc(65536);
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if (!dev_priv->susres.ramin_copy)
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return -ENOMEM;
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for (i = 0x700000; i < 0x710000; i += 4)
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dev_priv->susres.ramin_copy[i/4] = nv_rd32(dev, i);
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return 0;
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}
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void
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nvc0_instmem_resume(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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u64 chan;
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int i;
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chan = dev_priv->vram_size - dev_priv->ramin_rsvd_vram;
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nv_wr32(dev, 0x001700, chan >> 16);
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for (i = 0x700000; i < 0x710000; i += 4)
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nv_wr32(dev, i, dev_priv->susres.ramin_copy[i/4]);
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vfree(dev_priv->susres.ramin_copy);
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dev_priv->susres.ramin_copy = NULL;
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nv_wr32(dev, 0x001714, 0xc0000000 | (chan >> 12));
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}
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int
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