linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / arch / powerpc / kernel / pci_iommu.c

diff --git a/arch/powerpc/kernel/pci_iommu.c b/arch/powerpc/kernel/pci_iommu.c
index 0688b25..bdf15db 100644 (file)
--- a/arch/powerpc/kernel/pci_iommu.c
+++ b/arch/powerpc/kernel/pci_iommu.c
@@ -1,4 +1,5 @@
 /*
+ * arch/ppc64/kernel/pci_iommu.c
  * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
  *
  * Rewrite, cleanup, new allocation schemes:
@@ -44,40 +45,21 @@
  */
 #define PCI_GET_DN(dev) ((struct device_node *)((dev)->sysdata))
 
-static inline struct iommu_table *device_to_table(struct device *hwdev)
+static inline struct iommu_table *devnode_table(struct device *dev)
 {
        struct pci_dev *pdev;
 
-       if (!hwdev) {
+       if (!dev) {
                pdev = ppc64_isabridge_dev;
                if (!pdev)
                        return NULL;
        } else
-               pdev = to_pci_dev(hwdev);
+               pdev = to_pci_dev(dev);
 
        return PCI_DN(PCI_GET_DN(pdev))->iommu_table;
 }
 
 
-static inline unsigned long device_to_mask(struct device *hwdev)
-{
-       struct pci_dev *pdev;
-
-       if (!hwdev) {
-               pdev = ppc64_isabridge_dev;
-               if (!pdev) /* This is the best guess we can do */
-                       return 0xfffffffful;
-       } else
-               pdev = to_pci_dev(hwdev);
-
-       if (pdev->dma_mask)
-               return pdev->dma_mask;
-
-       /* Assume devices without mask can take 32 bit addresses */
-       return 0xfffffffful;
-}
-
-
 /* Allocates a contiguous real buffer and creates mappings over it.
  * Returns the virtual address of the buffer and sets dma_handle
  * to the dma address (mapping) of the first page.
@@ -85,15 +67,14 @@ static inline unsigned long device_to_mask(struct device *hwdev)
 static void *pci_iommu_alloc_coherent(struct device *hwdev, size_t size,
                           dma_addr_t *dma_handle, gfp_t flag)
 {
-       return iommu_alloc_coherent(device_to_table(hwdev), size, dma_handle,
-                       device_to_mask(hwdev), flag,
-                       pcibus_to_node(to_pci_dev(hwdev)->bus));
+       return iommu_alloc_coherent(devnode_table(hwdev), size, dma_handle,
+                       flag);
 }
 
 static void pci_iommu_free_coherent(struct device *hwdev, size_t size,
                         void *vaddr, dma_addr_t dma_handle)
 {
-       iommu_free_coherent(device_to_table(hwdev), size, vaddr, dma_handle);
+       iommu_free_coherent(devnode_table(hwdev), size, vaddr, dma_handle);
 }
 
 /* Creates TCEs for a user provided buffer.  The user buffer must be 
@@ -105,60 +86,43 @@ static void pci_iommu_free_coherent(struct device *hwdev, size_t size,
 static dma_addr_t pci_iommu_map_single(struct device *hwdev, void *vaddr,
                size_t size, enum dma_data_direction direction)
 {
-       return iommu_map_single(device_to_table(hwdev), vaddr, size,
-                               device_to_mask(hwdev), direction);
+       return iommu_map_single(devnode_table(hwdev), vaddr, size, direction);
 }
 
 
 static void pci_iommu_unmap_single(struct device *hwdev, dma_addr_t dma_handle,
                size_t size, enum dma_data_direction direction)
 {
-       iommu_unmap_single(device_to_table(hwdev), dma_handle, size, direction);
+       iommu_unmap_single(devnode_table(hwdev), dma_handle, size, direction);
 }
 
 
 static int pci_iommu_map_sg(struct device *pdev, struct scatterlist *sglist,
                int nelems, enum dma_data_direction direction)
 {
-       return iommu_map_sg(pdev, device_to_table(pdev), sglist,
-                       nelems, device_to_mask(pdev), direction);
+       return iommu_map_sg(pdev, devnode_table(pdev), sglist,
+                       nelems, direction);
 }
 
 static void pci_iommu_unmap_sg(struct device *pdev, struct scatterlist *sglist,
                int nelems, enum dma_data_direction direction)
 {
-       iommu_unmap_sg(device_to_table(pdev), sglist, nelems, direction);
+       iommu_unmap_sg(devnode_table(pdev), sglist, nelems, direction);
 }
 
 /* We support DMA to/from any memory page via the iommu */
 static int pci_iommu_dma_supported(struct device *dev, u64 mask)
 {
-       struct iommu_table *tbl = device_to_table(dev);
-
-       if (!tbl || tbl->it_offset > mask) {
-               printk(KERN_INFO "Warning: IOMMU table offset too big for device mask\n");
-               if (tbl)
-                       printk(KERN_INFO "mask: 0x%08lx, table offset: 0x%08lx\n",
-                               mask, tbl->it_offset);
-               else
-                       printk(KERN_INFO "mask: 0x%08lx, table unavailable\n",
-                               mask);
-               return 0;
-       } else
-               return 1;
+       return 1;
 }
 
-struct dma_mapping_ops pci_iommu_ops = {
-       .alloc_coherent = pci_iommu_alloc_coherent,
-       .free_coherent = pci_iommu_free_coherent,
-       .map_single = pci_iommu_map_single,
-       .unmap_single = pci_iommu_unmap_single,
-       .map_sg = pci_iommu_map_sg,
-       .unmap_sg = pci_iommu_unmap_sg,
-       .dma_supported = pci_iommu_dma_supported,
-};
-
 void pci_iommu_init(void)
 {
-       pci_dma_ops = pci_iommu_ops;
+       pci_dma_ops.alloc_coherent = pci_iommu_alloc_coherent;
+       pci_dma_ops.free_coherent = pci_iommu_free_coherent;
+       pci_dma_ops.map_single = pci_iommu_map_single;
+       pci_dma_ops.unmap_single = pci_iommu_unmap_single;
+       pci_dma_ops.map_sg = pci_iommu_map_sg;
+       pci_dma_ops.unmap_sg = pci_iommu_unmap_sg;
+       pci_dma_ops.dma_supported = pci_iommu_dma_supported;
 }