[PATCH] x86_64: Calgary IOMMU - Calgary specific bits

This patch hooks Calgary into the build, the x86-64 IOMMU
initialization paths, and introduces the Calgary specific bits.  The
implementation draws inspiration from both PPC (which has support for
the same chip but requires firmware support which we don't have on
x86-64) and gart. Calgary is different from gart in that it support a
translation table per PHB, as opposed to the single gart aperture.

Changes from previous version:
 * Addition of boot-time disablement for bus-level translation/isolation
   (e.g, enable userspace DMA for things like X)
 * Usage of newer IOMMU abstraction functions

Signed-off-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Jon Mason <jdmason@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/x86_64/kernel/pci-dma.c b/arch/x86_64/kernel/pci-dma.c
index a45844c7e3a3..9c44f4f2433d 100644
--- a/arch/x86_64/kernel/pci-dma.c
+++ b/arch/x86_64/kernel/pci-dma.c
@@ -9,6 +9,7 @@
 #include <linux/module.h>
 #include <asm/io.h>
 #include <asm/proto.h>
+#include <asm/calgary.h>
 
 int iommu_merge __read_mostly = 0;
 EXPORT_SYMBOL(iommu_merge);
@@ -291,6 +292,10 @@ void __init pci_iommu_alloc(void)
         iommu_hole_init();
 #endif
 
+#ifdef CONFIG_CALGARY_IOMMU
+        detect_calgary();
+#endif
+
 #ifdef CONFIG_SWIOTLB
         pci_swiotlb_init();
 #endif
@@ -298,6 +303,10 @@ void __init pci_iommu_alloc(void)
 
 static int __init pci_iommu_init(void)
 {
+#ifdef CONFIG_CALGARY_IOMMU
+        calgary_iommu_init();
+#endif
+
 #ifdef CONFIG_IOMMU
         gart_iommu_init();
 #endif