x86/ia64: intel-iommu: move to drivers/iommu/

This should ease finding similarities with different platforms,
with the intention of solving problems once in a generic framework
which everyone can use.

Note: to move intel-iommu.c, the declaration of pci_find_upstream_pcie_bridge()
has to move from drivers/pci/pci.h to include/linux/pci.h. This is handled
in this patch, too.

As suggested, also drop DMAR's EXPERIMENTAL tag while we're at it.

Compile-tested on x86_64.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

9 files changed, 51 insertions, 9 deletions

diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 9246c5bf25a..e2a5f141ae2 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -46,3 +46,52 @@ config AMD_IOMMU_STATS
           statistics about whats happening in the driver and exports that
           information to userspace via debugfs.
           If unsure, say N.
+
+# Intel IOMMU support
+config DMAR
+        bool "Support for DMA Remapping Devices"
+        depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
+        select IOMMU_API
+        help
+          DMA remapping (DMAR) devices support enables independent address
+          translations for Direct Memory Access (DMA) from devices.
+          These DMA remapping devices are reported via ACPI tables
+          and include PCI device scope covered by these DMA
+          remapping devices.
+
+config DMAR_DEFAULT_ON
+        def_bool y
+        prompt "Enable DMA Remapping Devices by default"
+        depends on DMAR
+        help
+          Selecting this option will enable a DMAR device at boot time if
+          one is found. If this option is not selected, DMAR support can
+          be enabled by passing intel_iommu=on to the kernel.
+
+config DMAR_BROKEN_GFX_WA
+        bool "Workaround broken graphics drivers (going away soon)"
+        depends on DMAR && BROKEN && X86
+        ---help---
+          Current Graphics drivers tend to use physical address
+          for DMA and avoid using DMA APIs. Setting this config
+          option permits the IOMMU driver to set a unity map for
+          all the OS-visible memory. Hence the driver can continue
+          to use physical addresses for DMA, at least until this
+          option is removed in the 2.6.32 kernel.
+
+config DMAR_FLOPPY_WA
+        def_bool y
+        depends on DMAR && X86
+        ---help---
+          Floppy disk drivers are known to bypass DMA API calls
+          thereby failing to work when IOMMU is enabled. This
+          workaround will setup a 1:1 mapping for the first
+          16MiB to make floppy (an ISA device) work.
+
+config INTR_REMAP
+        bool "Support for Interrupt Remapping (EXPERIMENTAL)"
+        depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
+        ---help---
+          Supports Interrupt remapping for IO-APIC and MSI devices.
+          To use x2apic mode in the CPU's which support x2APIC enhancements or
+          to support platforms with CPU's having > 8 bit APIC ID, say Y.
diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile
index 4237eaf8460..49e9c0f46bd 100644
--- a/drivers/iommu/Makefile
+++ b/drivers/iommu/Makefile
@@ -1,3 +1,5 @@
 obj-$(CONFIG_IOMMU_API) += iommu.o
 obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o
 obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o
+obj-$(CONFIG_DMAR) += dmar.o iova.o intel-iommu.o
+obj-$(CONFIG_INTR_REMAP) += dmar.o intr_remapping.o
diff --git a/drivers/pci/dmar.c b/drivers/iommu/dmar.c
index 3dc9befa5ae..3dc9befa5ae 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/iommu/dmar.c
diff --git a/drivers/pci/intel-iommu.c b/drivers/iommu/intel-iommu.c
index f02c34d26d1..c621c98c99d 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -42,7 +42,6 @@
 #include <linux/pci-ats.h>
 #include <asm/cacheflush.h>
 #include <asm/iommu.h>
-#include "pci.h"
 
 #define ROOT_SIZE               VTD_PAGE_SIZE
 #define CONTEXT_SIZE            VTD_PAGE_SIZE
diff --git a/drivers/pci/intr_remapping.c b/drivers/iommu/intr_remapping.c
index 3607faf28a4..1a89d4a2cad 100644
--- a/drivers/pci/intr_remapping.c
+++ b/drivers/iommu/intr_remapping.c
@@ -13,7 +13,6 @@
 #include "intr_remapping.h"
 #include <acpi/acpi.h>
 #include <asm/pci-direct.h>
-#include "pci.h"
 
 static struct ioapic_scope ir_ioapic[MAX_IO_APICS];
 static struct hpet_scope ir_hpet[MAX_HPET_TBS];
diff --git a/drivers/pci/intr_remapping.h b/drivers/iommu/intr_remapping.h
index 5662fecfee6..5662fecfee6 100644
--- a/drivers/pci/intr_remapping.h
+++ b/drivers/iommu/intr_remapping.h
diff --git a/drivers/pci/iova.c b/drivers/iommu/iova.c
index c5c274ab5c5..c5c274ab5c5 100644
--- a/drivers/pci/iova.c
+++ b/drivers/iommu/iova.c
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index 094308e41be..825c02b40da 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -29,11 +29,6 @@ obj-$(CONFIG_PCI_MSI) += msi.o
 # Build the Hypertransport interrupt support
 obj-$(CONFIG_HT_IRQ) += htirq.o
 
-# Build Intel IOMMU support
-obj-$(CONFIG_DMAR) += dmar.o iova.o intel-iommu.o
-
-obj-$(CONFIG_INTR_REMAP) += dmar.o intr_remapping.o
-
 obj-$(CONFIG_PCI_IOV) += iov.o
 
 #
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 731e20265ac..b7bf11dd546 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -184,8 +184,6 @@ pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
         return NULL;
 }
 
-struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
-
 /* PCI slot sysfs helper code */
 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)