[Xen-devel] [PATCH] remove x86_64 pci-nommu-xen.c

[Chris Wright <chrisw@xxxxxxxxxxxx>]

This file is identical to its mainline counterpart, so remove it.

Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
---

diff -r 10d6c1dc1bc7 linux-2.6-xen-sparse/arch/x86_64/kernel/pci-nommu-xen.c
--- a/linux-2.6-xen-sparse/arch/x86_64/kernel/pci-nommu-xen.c   Thu Feb  9 
12:17:35 2006 +0100
+++ /dev/null   Thu Jan  1 00:00:00 1970 +0000
@@ -1,99 +0,0 @@
-/* Fallback functions when the main IOMMU code is not compiled in. This
-   code is roughly equivalent to i386. */
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/pci.h>
-#include <linux/string.h>
-#include <asm/proto.h>
-#include <asm/processor.h>
-#include <asm/dma.h>
-
-static int
-check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size)
-{
-        if (hwdev && bus + size > *hwdev->dma_mask) {
-               printk(KERN_ERR
-                   "nommu_%s: overflow %Lx+%lu of device mask %Lx\n",
-              name, (long long)bus, size, (long long)*hwdev->dma_mask);
-               return 0;
-       }
-       return 1;
-}
-
-static dma_addr_t
-nommu_map_single(struct device *hwdev, void *ptr, size_t size,
-              int direction)
-{
-       dma_addr_t bus = virt_to_bus(ptr);
-       if (!check_addr("map_single", hwdev, bus, size))
-                               return bad_dma_address;
-       return bus;
-}
-
-void nommu_unmap_single(struct device *dev, dma_addr_t addr,size_t size,
-                       int direction)
-{
-}
-
-/* Map a set of buffers described by scatterlist in streaming
- * mode for DMA.  This is the scatter-gather version of the
- * above pci_map_single interface.  Here the scatter gather list
- * elements are each tagged with the appropriate dma address
- * and length.  They are obtained via sg_dma_{address,length}(SG).
- *
- * NOTE: An implementation may be able to use a smaller number of
- *       DMA address/length pairs than there are SG table elements.
- *       (for example via virtual mapping capabilities)
- *       The routine returns the number of addr/length pairs actually
- *       used, at most nents.
- *
- * Device ownership issues as mentioned above for pci_map_single are
- * the same here.
- */
-int nommu_map_sg(struct device *hwdev, struct scatterlist *sg,
-              int nents, int direction)
-{
-       int i;
-
-       BUG_ON(direction == DMA_NONE);
-       for (i = 0; i < nents; i++ ) {
-               struct scatterlist *s = &sg[i];
-               BUG_ON(!s->page);
-               s->dma_address = virt_to_bus(page_address(s->page) +s->offset);
-               if (!check_addr("map_sg", hwdev, s->dma_address, s->length))
-                       return 0;
-               s->dma_length = s->length;
-       }
-       return nents;
-}
-
-/* Unmap a set of streaming mode DMA translations.
- * Again, cpu read rules concerning calls here are the same as for
- * pci_unmap_single() above.
- */
-void nommu_unmap_sg(struct device *dev, struct scatterlist *sg,
-                 int nents, int dir)
-{
-}
-
-struct dma_mapping_ops nommu_dma_ops = {
-       .map_single = nommu_map_single,
-       .unmap_single = nommu_unmap_single,
-       .map_sg = nommu_map_sg,
-       .unmap_sg = nommu_unmap_sg,
-       .is_phys = 1,
-};
-
-void __init no_iommu_init(void)
-{
-       if (dma_ops)
-               return;
-       printk(KERN_INFO "PCI-DMA: Disabling IOMMU.\n");
-       dma_ops = &nommu_dma_ops;
-       if (end_pfn > MAX_DMA32_PFN) {
-               printk(KERN_ERR
-                      "WARNING more than 4GB of memory but IOMMU not compiled 
in.\n"
-                      KERN_ERR "WARNING 32bit PCI may malfunction.\n"
-                      KERN_ERR "You might want to enable CONFIG_GART_IOMMU\n");
-       }
-}

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