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Diffstat (limited to 'arch/powerpc/platforms/cell/iommu.c')
-rw-r--r--arch/powerpc/platforms/cell/iommu.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index 26a067122a54..fc46fcac3921 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -1159,6 +1159,26 @@ static int __init setup_iommu_fixed(char *str)
}
__setup("iommu_fixed=", setup_iommu_fixed);
+static u64 cell_dma_get_required_mask(struct device *dev)
+{
+ struct dma_map_ops *dma_ops;
+
+ if (!dev->dma_mask)
+ return 0;
+
+ if (!iommu_fixed_disabled &&
+ cell_iommu_get_fixed_address(dev) != OF_BAD_ADDR)
+ return DMA_BIT_MASK(64);
+
+ dma_ops = get_dma_ops(dev);
+ if (dma_ops->get_required_mask)
+ return dma_ops->get_required_mask(dev);
+
+ WARN_ONCE(1, "no get_required_mask in %p ops", dma_ops);
+
+ return DMA_BIT_MASK(64);
+}
+
static int __init cell_iommu_init(void)
{
struct device_node *np;
@@ -1175,6 +1195,7 @@ static int __init cell_iommu_init(void)
/* Setup various ppc_md. callbacks */
ppc_md.pci_dma_dev_setup = cell_pci_dma_dev_setup;
+ ppc_md.dma_get_required_mask = cell_dma_get_required_mask;
ppc_md.tce_build = tce_build_cell;
ppc_md.tce_free = tce_free_cell;