drm/nv40: support for 39-bit dma addresses on native PCIE chipsets
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index 123969d..5cf924e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -393,11 +393,17 @@
struct ttm_bo_device *bdev = &dev_priv->ttm.bdev;
int ret, dma_bits;
- if (dev_priv->card_type >= NV_50 &&
- pci_dma_supported(dev->pdev, DMA_BIT_MASK(40)))
- dma_bits = 40;
- else
- dma_bits = 32;
+ dma_bits = 32;
+ if (dev_priv->card_type >= NV_50) {
+ if (pci_dma_supported(dev->pdev, DMA_BIT_MASK(40)))
+ dma_bits = 40;
+ } else
+ if (drm_pci_device_is_pcie(dev) &&
+ dev_priv->chipset != 0x40 &&
+ dev_priv->chipset != 0x45) {
+ if (pci_dma_supported(dev->pdev, DMA_BIT_MASK(39)))
+ dma_bits = 39;
+ }
ret = pci_set_dma_mask(dev->pdev, DMA_BIT_MASK(dma_bits));
if (ret)