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authorAnton Blanchard <anton@samba.org>2012-06-24 18:23:53 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-07-10 19:18:51 +1000
commit62761d1f68937b4d3dd509032942290f2359bde7 (patch)
treef425cb4ea938b7ae2eb0052424737aa1eba5701e /arch/powerpc/kernel
parent9c41ef086e435be8f10be4cb9636c7ecf6709ddd (diff)
powerpc/vio: Remove dma not supported warnings
During boot we see a number of these warnings: vio 30000000: Warning: IOMMU dma not supported: mask 0xffffffffffffffff, table unavailable The reason for this is that we set IOMMU properties for all VIO devices even if they are not DMA capable. Only set DMA ops, table and mask for devices with a DMA window. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/vio.c24
1 files changed, 15 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 06cbc309b81..7d05fe2b563 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -1397,21 +1397,27 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
viodev->name = of_node->name;
viodev->dev.of_node = of_node_get(of_node);
- if (firmware_has_feature(FW_FEATURE_CMO))
- vio_cmo_set_dma_ops(viodev);
- else
- set_dma_ops(&viodev->dev, &dma_iommu_ops);
- set_iommu_table_base(&viodev->dev, vio_build_iommu_table(viodev));
set_dev_node(&viodev->dev, of_node_to_nid(of_node));
/* init generic 'struct device' fields: */
viodev->dev.parent = &vio_bus_device.dev;
viodev->dev.bus = &vio_bus_type;
viodev->dev.release = vio_dev_release;
- /* needed to ensure proper operation of coherent allocations
- * later, in case driver doesn't set it explicitly */
- dma_set_mask(&viodev->dev, DMA_BIT_MASK(64));
- dma_set_coherent_mask(&viodev->dev, DMA_BIT_MASK(64));
+
+ if (of_get_property(viodev->dev.of_node, "ibm,my-dma-window", NULL)) {
+ if (firmware_has_feature(FW_FEATURE_CMO))
+ vio_cmo_set_dma_ops(viodev);
+ else
+ set_dma_ops(&viodev->dev, &dma_iommu_ops);
+
+ set_iommu_table_base(&viodev->dev,
+ vio_build_iommu_table(viodev));
+
+ /* needed to ensure proper operation of coherent allocations
+ * later, in case driver doesn't set it explicitly */
+ dma_set_mask(&viodev->dev, DMA_BIT_MASK(64));
+ dma_set_coherent_mask(&viodev->dev, DMA_BIT_MASK(64));
+ }
/* register with generic device framework */
if (device_register(&viodev->dev)) {