X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fx86_64%2Fkernel%2Fpci-swiotlb-xen.c;fp=arch%2Fx86_64%2Fkernel%2Fpci-swiotlb-xen.c;h=0a5a8d4f023acf4a15be6c149a247bd663b493e5;hb=1db395853d4f30d6120458bd279ede1f882a8525;hp=0000000000000000000000000000000000000000;hpb=34a75f0025b9cf803b6a88db032e6ad6950c9313;p=linux-2.6.git

diff --git a/arch/x86_64/kernel/pci-swiotlb-xen.c b/arch/x86_64/kernel/pci-swiotlb-xen.c
new file mode 100644
index 000000000..0a5a8d4f0
--- /dev/null
+++ b/arch/x86_64/kernel/pci-swiotlb-xen.c
@@ -0,0 +1,54 @@
+/* Glue code to lib/swiotlb.c */
+
+#include <linux/pci.h>
+#include <linux/cache.h>
+#include <linux/module.h>
+#include <asm/dma-mapping.h>
+#include <asm/proto.h>
+#include <asm/swiotlb.h>
+#include <asm/dma.h>
+
+#if 0
+int swiotlb __read_mostly;
+EXPORT_SYMBOL(swiotlb);
+#endif
+
+struct dma_mapping_ops swiotlb_dma_ops = {
+#if 0
+	.mapping_error = swiotlb_dma_mapping_error,
+	.alloc_coherent = swiotlb_alloc_coherent,
+	.free_coherent = swiotlb_free_coherent,
+	.map_single = swiotlb_map_single,
+	.unmap_single = swiotlb_unmap_single,
+	.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
+	.sync_single_for_device = swiotlb_sync_single_for_device,
+	.sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
+	.sync_single_range_for_device = swiotlb_sync_single_range_for_device,
+	.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
+	.sync_sg_for_device = swiotlb_sync_sg_for_device,
+	.map_sg = swiotlb_map_sg,
+	.unmap_sg = swiotlb_unmap_sg,
+	.dma_supported = NULL,
+#endif
+};
+
+void pci_swiotlb_init(void)
+{
+#if 0
+	/* don't initialize swiotlb if iommu=off (no_iommu=1) */
+	if (!iommu_aperture && !no_iommu &&
+	    (end_pfn > MAX_DMA32_PFN || force_iommu))
+	       swiotlb = 1;
+	if (swiotlb) {
+		printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n");
+		swiotlb_init();
+		dma_ops = &swiotlb_dma_ops;
+	}
+#else
+	swiotlb_init();
+	if (swiotlb) {
+		printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n");
+		dma_ops = &swiotlb_dma_ops;
+	}
+#endif
+}