powerpc: Change archdata dma_data to a union

Sometimes this is used to hold a simple offset, and sometimes
it is used to hold a pointer.  This patch changes it to a union containing
void * and dma_addr_t.  get/set accessors are also provided, because it was
getting a bit ugly to get to the actual data.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

5 files changed, 10 insertions, 13 deletions

diff --git a/arch/powerpc/platforms/cell/beat_iommu.c b/arch/powerpc/platforms/cell/beat_iommu.c
index 93b0efddd658..39d361c5c6d2 100644
--- a/arch/powerpc/platforms/cell/beat_iommu.c
+++ b/arch/powerpc/platforms/cell/beat_iommu.c
@@ -77,7 +77,7 @@ static void __init celleb_init_direct_mapping(void)
 static void celleb_dma_dev_setup(struct device *dev)
 {
         dev->archdata.dma_ops = get_pci_dma_ops();
-        dev->archdata.dma_data = (void *)celleb_dma_direct_offset;
+        set_dma_offset(dev, celleb_dma_direct_offset);
 }
 
 static void celleb_pci_dma_dev_setup(struct pci_dev *pdev)
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index 416db17eb18f..ca5bfdfe47f2 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -657,15 +657,13 @@ static void cell_dma_dev_setup_fixed(struct device *dev);
 
 static void cell_dma_dev_setup(struct device *dev)
 {
-        struct dev_archdata *archdata = &dev->archdata;
-
         /* Order is important here, these are not mutually exclusive */
         if (get_dma_ops(dev) == &dma_iommu_fixed_ops)
                 cell_dma_dev_setup_fixed(dev);
         else if (get_pci_dma_ops() == &dma_iommu_ops)
-                archdata->dma_data = cell_get_iommu_table(dev);
+                set_iommu_table_base(dev, cell_get_iommu_table(dev));
         else if (get_pci_dma_ops() == &dma_direct_ops)
-                archdata->dma_data = (void *)cell_dma_direct_offset;
+                set_dma_offset(dev, cell_dma_direct_offset);
         else
                 BUG();
 }
@@ -973,11 +971,10 @@ static int dma_set_mask_and_switch(struct device *dev, u64 dma_mask)
 
 static void cell_dma_dev_setup_fixed(struct device *dev)
 {
-        struct dev_archdata *archdata = &dev->archdata;
         u64 addr;
 
         addr = cell_iommu_get_fixed_address(dev) + dma_iommu_fixed_base;
-        archdata->dma_data = (void *)addr;
+        set_dma_offset(dev, addr);
 
         dev_dbg(dev, "iommu: fixed addr = %llx\n", addr);
 }
diff --git a/arch/powerpc/platforms/iseries/iommu.c b/arch/powerpc/platforms/iseries/iommu.c
index 6c1e1011959e..9d53cb481a7c 100644
--- a/arch/powerpc/platforms/iseries/iommu.c
+++ b/arch/powerpc/platforms/iseries/iommu.c
@@ -193,7 +193,7 @@ static void pci_dma_dev_setup_iseries(struct pci_dev *pdev)
                 pdn->iommu_table = iommu_init_table(tbl, -1);
         else
                 kfree(tbl);
-        pdev->dev.archdata.dma_data = pdn->iommu_table;
+        set_iommu_table_base(&pdev->dev, pdn->iommu_table);
 }
 #else
 #define pci_dma_dev_setup_iseries       NULL
diff --git a/arch/powerpc/platforms/pasemi/iommu.c b/arch/powerpc/platforms/pasemi/iommu.c
index a0ff03a3d8da..7b1d608ea3c8 100644
--- a/arch/powerpc/platforms/pasemi/iommu.c
+++ b/arch/powerpc/platforms/pasemi/iommu.c
@@ -189,7 +189,7 @@ static void pci_dma_dev_setup_pasemi(struct pci_dev *dev)
         }
 #endif
 
-        dev->dev.archdata.dma_data = &iommu_table_iobmap;
+        set_iommu_table_base(&dev->dev, &iommu_table_iobmap);
 }
 
 static void pci_dma_bus_setup_null(struct pci_bus *b) { }
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 661c8e02bcba..1a0000a4b6d6 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -482,7 +482,7 @@ static void pci_dma_dev_setup_pSeries(struct pci_dev *dev)
                                    phb->node);
                 iommu_table_setparms(phb, dn, tbl);
                 PCI_DN(dn)->iommu_table = iommu_init_table(tbl, phb->node);
-                dev->dev.archdata.dma_data = PCI_DN(dn)->iommu_table;
+                set_iommu_table_base(&dev->dev, PCI_DN(dn)->iommu_table);
                 return;
         }
 
@@ -494,7 +494,7 @@ static void pci_dma_dev_setup_pSeries(struct pci_dev *dev)
                 dn = dn->parent;
 
         if (dn && PCI_DN(dn))
-                dev->dev.archdata.dma_data = PCI_DN(dn)->iommu_table;
+                set_iommu_table_base(&dev->dev, PCI_DN(dn)->iommu_table);
         else
                 printk(KERN_WARNING "iommu: Device %s has no iommu table\n",
                        pci_name(dev));
@@ -538,7 +538,7 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev)
          */
         if (dma_window == NULL || pdn->parent == NULL) {
                 pr_debug("  no dma window for device, linking to parent\n");
-                dev->dev.archdata.dma_data = PCI_DN(pdn)->iommu_table;
+                set_iommu_table_base(&dev->dev, PCI_DN(pdn)->iommu_table);
                 return;
         }
 
@@ -554,7 +554,7 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev)
                 pr_debug("  found DMA window, table: %p\n", pci->iommu_table);
         }
 
-        dev->dev.archdata.dma_data = pci->iommu_table;
+        set_iommu_table_base(&dev->dev, pci->iommu_table);
 }
 #else  /* CONFIG_PCI */
 #define pci_dma_bus_setup_pSeries       NULL