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authorNishanth Aravamudan <nacc@us.ibm.com>2010-10-18 07:27:04 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-12-09 15:17:50 +1100
commitb3c73856ae47d43d0d181f9de1c1c6c0820c4515 (patch)
treee7528ed3ed14b57f5861edb528c86adb1c66c393 /arch/powerpc
parent56d8adc5695a8d3f070c8498d532389580af5611 (diff)
downloadop-kernel-dev-b3c73856ae47d43d0d181f9de1c1c6c0820c4515.zip
op-kernel-dev-b3c73856ae47d43d0d181f9de1c1c6c0820c4515.tar.gz
powerpc/iommu: Use coherent_dma_mask for alloc_coherent
The IOMMU code has been passing the dma-mask instead of the coherent_dma_mask to the iommu allocator. Coherent allocations should be made using the coherent_dma_mask. Also update the vio code to ensure the coherent_dma_mask is set. Without this change drivers, such as ibmvscsi, fail to load with the corrected dma_iommu_alloc_coherent(). Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/dma-iommu.c2
-rw-r--r--arch/powerpc/kernel/vio.c4
2 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c
index 6e54a0f..e755415 100644
--- a/arch/powerpc/kernel/dma-iommu.c
+++ b/arch/powerpc/kernel/dma-iommu.c
@@ -19,7 +19,7 @@ static void *dma_iommu_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
{
return iommu_alloc_coherent(dev, get_iommu_table_base(dev), size,
- dma_handle, device_to_mask(dev), flag,
+ dma_handle, dev->coherent_dma_mask, flag,
dev_to_node(dev));
}
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index b265405..1b695fd 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -1257,6 +1257,10 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node)
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));
/* register with generic device framework */
if (device_register(&viodev->dev)) {
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