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powerpc/iommu: Cleanup setting of DMA base/offset
Now that the table and the offset can co-exist, we no longer need to flip/flop, we can just establish both once at boot time. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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@ -1620,11 +1620,9 @@ static int pnv_pci_ioda_dma_set_mask(struct pci_dev *pdev, u64 dma_mask)
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if (bypass) {
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dev_info(&pdev->dev, "Using 64-bit DMA iommu bypass\n");
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set_dma_ops(&pdev->dev, &dma_direct_ops);
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set_dma_offset(&pdev->dev, pe->tce_bypass_base);
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} else {
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dev_info(&pdev->dev, "Using 32-bit DMA via iommu\n");
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set_dma_ops(&pdev->dev, &dma_iommu_ops);
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set_iommu_table_base(&pdev->dev, pe->table_group.tables[0]);
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}
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*pdev->dev.dma_mask = dma_mask;
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return 0;
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@ -1659,6 +1657,7 @@ static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe,
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list_for_each_entry(dev, &bus->devices, bus_list) {
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set_iommu_table_base(&dev->dev, pe->table_group.tables[0]);
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set_dma_offset(&dev->dev, pe->tce_bypass_base);
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iommu_add_device(&dev->dev);
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if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate)
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@ -1253,11 +1253,10 @@ static int dma_set_mask_pSeriesLP(struct device *dev, u64 dma_mask)
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}
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}
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/* fall back on iommu ops, restore table pointer with ops */
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/* fall back on iommu ops */
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if (!ddw_enabled && get_dma_ops(dev) != &dma_iommu_ops) {
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dev_info(dev, "Restoring 32-bit DMA via iommu\n");
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set_dma_ops(dev, &dma_iommu_ops);
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pci_dma_dev_setup_pSeriesLP(pdev);
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}
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check_mask:
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@ -313,20 +313,11 @@ static void iommu_table_dart_setup(void)
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set_bit(iommu_table_dart.it_size - 1, iommu_table_dart.it_map);
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}
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static void dma_dev_setup_dart(struct device *dev)
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{
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/* We only have one iommu table on the mac for now, which makes
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* things simple. Setup all PCI devices to point to this table
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*/
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if (get_dma_ops(dev) == &dma_direct_ops)
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set_dma_offset(dev, DART_U4_BYPASS_BASE);
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else
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set_iommu_table_base(dev, &iommu_table_dart);
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}
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static void pci_dma_dev_setup_dart(struct pci_dev *dev)
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{
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dma_dev_setup_dart(&dev->dev);
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if (dart_is_u4)
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set_dma_offset(&dev->dev, DART_U4_BYPASS_BASE);
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set_iommu_table_base(&dev->dev, &iommu_table_dart);
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}
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static void pci_dma_bus_setup_dart(struct pci_bus *bus)
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@ -370,7 +361,6 @@ static int dart_dma_set_mask(struct device *dev, u64 dma_mask)
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dev_info(dev, "Using 32-bit DMA via iommu\n");
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set_dma_ops(dev, &dma_iommu_ops);
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}
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dma_dev_setup_dart(dev);
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*dev->dma_mask = dma_mask;
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return 0;
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