/*
+ * arch/ppc64/kernel/pci_iommu.c
* Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
*
* Rewrite, cleanup, new allocation schemes:
}
-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.
dma_addr_t *dma_handle, gfp_t flag)
{
return iommu_alloc_coherent(devnode_table(hwdev), size, dma_handle,
- device_to_mask(hwdev), flag);
+ flag);
}
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(devnode_table(hwdev), vaddr, size,
- device_to_mask(hwdev), direction);
+ return iommu_map_single(devnode_table(hwdev), vaddr, size, direction);
}
int nelems, enum dma_data_direction direction)
{
return iommu_map_sg(pdev, devnode_table(pdev), sglist,
- nelems, device_to_mask(pdev), direction);
+ nelems, direction);
}
static void pci_iommu_unmap_sg(struct device *pdev, struct scatterlist *sglist,
/* 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 = devnode_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;
}
void pci_iommu_init(void)