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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2015-06-24 15:25:27 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2015-07-13 10:10:55 +1000
commite91c25111aa373af7439d97ab0e606bcffd599ef (patch)
treef8eba1cd404beeffa81c2df91485a141f6ea9441 /arch
parent2db4928bb559f8b43ca75879548111dc13a7de31 (diff)
downloadlinux-e91c25111aa373af7439d97ab0e606bcffd599ef.tar.bz2
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/platforms/powernv/pci-ioda.c3
-rw-r--r--arch/powerpc/platforms/pseries/iommu.c3
-rw-r--r--arch/powerpc/sysdev/dart_iommu.c16
3 files changed, 5 insertions, 17 deletions
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 5738d315248b..2c286b57e520 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1620,11 +1620,9 @@ static int pnv_pci_ioda_dma_set_mask(struct pci_dev *pdev, u64 dma_mask)
if (bypass) {
dev_info(&pdev->dev, "Using 64-bit DMA iommu bypass\n");
set_dma_ops(&pdev->dev, &dma_direct_ops);
- set_dma_offset(&pdev->dev, pe->tce_bypass_base);
} else {
dev_info(&pdev->dev, "Using 32-bit DMA via iommu\n");
set_dma_ops(&pdev->dev, &dma_iommu_ops);
- set_iommu_table_base(&pdev->dev, pe->table_group.tables[0]);
}
*pdev->dev.dma_mask = dma_mask;
return 0;
@@ -1659,6 +1657,7 @@ static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe,
list_for_each_entry(dev, &bus->devices, bus_list) {
set_iommu_table_base(&dev->dev, pe->table_group.tables[0]);
+ set_dma_offset(&dev->dev, pe->tce_bypass_base);
iommu_add_device(&dev->dev);
if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate)
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 10510dea16b3..0946b98d75d4 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -1253,11 +1253,10 @@ static int dma_set_mask_pSeriesLP(struct device *dev, u64 dma_mask)
}
}
- /* fall back on iommu ops, restore table pointer with ops */
+ /* fall back on iommu ops */
if (!ddw_enabled && get_dma_ops(dev) != &dma_iommu_ops) {
dev_info(dev, "Restoring 32-bit DMA via iommu\n");
set_dma_ops(dev, &dma_iommu_ops);
- pci_dma_dev_setup_pSeriesLP(pdev);
}
check_mask:
diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c
index 90bcdfeedf48..b7348637eae0 100644
--- a/arch/powerpc/sysdev/dart_iommu.c
+++ b/arch/powerpc/sysdev/dart_iommu.c
@@ -313,20 +313,11 @@ static void iommu_table_dart_setup(void)
set_bit(iommu_table_dart.it_size - 1, iommu_table_dart.it_map);
}
-static void dma_dev_setup_dart(struct device *dev)
-{
- /* We only have one iommu table on the mac for now, which makes
- * things simple. Setup all PCI devices to point to this table
- */
- if (get_dma_ops(dev) == &dma_direct_ops)
- set_dma_offset(dev, DART_U4_BYPASS_BASE);
- else
- set_iommu_table_base(dev, &iommu_table_dart);
-}
-
static void pci_dma_dev_setup_dart(struct pci_dev *dev)
{
- dma_dev_setup_dart(&dev->dev);
+ if (dart_is_u4)
+ set_dma_offset(&dev->dev, DART_U4_BYPASS_BASE);
+ set_iommu_table_base(&dev->dev, &iommu_table_dart);
}
static void pci_dma_bus_setup_dart(struct pci_bus *bus)
@@ -370,7 +361,6 @@ static int dart_dma_set_mask(struct device *dev, u64 dma_mask)
dev_info(dev, "Using 32-bit DMA via iommu\n");
set_dma_ops(dev, &dma_iommu_ops);
}
- dma_dev_setup_dart(dev);
*dev->dma_mask = dma_mask;
return 0;