[IA64] Add Variable Page Size and IA64 Support in Intel IOMMU
The patch contains Intel IOMMU IA64 specific code. It defines new
machvec dig_vtd, hooks for IOMMU, DMAR table detection, cache line flush
function, etc.
For a generic kernel with CONFIG_DMAR=y, if Intel IOMMU is detected,
dig_vtd is used for machinve vector. Otherwise, kernel falls back to
dig machine vector. Kernel parameter "machvec=dig" or "intel_iommu=off"
can be used to force kernel to boot dig machine vector.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/kernel/pci-swiotlb.c b/arch/ia64/kernel/pci-swiotlb.c
new file mode 100644
index 0000000..16c5051
--- /dev/null
+++ b/arch/ia64/kernel/pci-swiotlb.c
@@ -0,0 +1,46 @@
+/* Glue code to lib/swiotlb.c */
+
+#include <linux/pci.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);
+
+struct dma_mapping_ops swiotlb_dma_ops = {
+ .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_op = swiotlb_dma_supported,
+};
+
+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();
+ dma_ops = &swiotlb_dma_ops;
+#else
+ panic("Unable to find Intel IOMMU");
+#endif
+ }
+}