Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / ia64 / kernel / pci-swiotlb.c

diff --git a/kernel/arch/ia64/kernel/pci-swiotlb.c b/kernel/arch/ia64/kernel/pci-swiotlb.c
new file mode 100644 (file)
index 0000000..939260a
--- /dev/null
+++ b/kernel/arch/ia64/kernel/pci-swiotlb.c
@@ -0,0 +1,67 @@
+/* Glue code to lib/swiotlb.c */
+
+#include <linux/pci.h>
+#include <linux/gfp.h>
+#include <linux/cache.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/swiotlb.h>
+#include <asm/dma.h>
+#include <asm/iommu.h>
+#include <asm/machvec.h>
+
+int swiotlb __read_mostly;
+EXPORT_SYMBOL(swiotlb);
+
+static void *ia64_swiotlb_alloc_coherent(struct device *dev, size_t size,
+                                        dma_addr_t *dma_handle, gfp_t gfp,
+                                        struct dma_attrs *attrs)
+{
+       if (dev->coherent_dma_mask != DMA_BIT_MASK(64))
+               gfp |= GFP_DMA;
+       return swiotlb_alloc_coherent(dev, size, dma_handle, gfp);
+}
+
+static void ia64_swiotlb_free_coherent(struct device *dev, size_t size,
+                                      void *vaddr, dma_addr_t dma_addr,
+                                      struct dma_attrs *attrs)
+{
+       swiotlb_free_coherent(dev, size, vaddr, dma_addr);
+}
+
+struct dma_map_ops swiotlb_dma_ops = {
+       .alloc = ia64_swiotlb_alloc_coherent,
+       .free = ia64_swiotlb_free_coherent,
+       .map_page = swiotlb_map_page,
+       .unmap_page = swiotlb_unmap_page,
+       .map_sg = swiotlb_map_sg_attrs,
+       .unmap_sg = swiotlb_unmap_sg_attrs,
+       .sync_single_for_cpu = swiotlb_sync_single_for_cpu,
+       .sync_single_for_device = swiotlb_sync_single_for_device,
+       .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
+       .sync_sg_for_device = swiotlb_sync_sg_for_device,
+       .dma_supported = swiotlb_dma_supported,
+       .mapping_error = swiotlb_dma_mapping_error,
+};
+
+void __init swiotlb_dma_init(void)
+{
+       dma_ops = &swiotlb_dma_ops;
+       swiotlb_init(1);
+}
+
+void __init pci_swiotlb_init(void)
+{
+       if (!iommu_detected) {
+#ifdef CONFIG_IA64_GENERIC
+               swiotlb = 1;
+               printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
+               machvec_init("dig");
+               swiotlb_init(1);
+               dma_ops = &swiotlb_dma_ops;
+#else
+               panic("Unable to find Intel IOMMU");
+#endif
+       }
+}