drivers: iommu: move to a dedicated folder

Create a dedicated folder for iommu drivers, and move the base
iommu implementation over there.

Grouping the various iommu drivers in a single location will help
finding similar problems shared by different platforms, so they
could be solved once, in the iommu framework, instead of solved
differently (or duplicated) in each driver.

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

3 files changed, 2 insertions, 9 deletions

diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
index 1516896e8d17..efb7b7dfc20b 100644
--- a/arch/arm/mach-msm/Kconfig
+++ b/arch/arm/mach-msm/Kconfig
@@ -205,9 +205,6 @@ config MSM_GPIOMUX
 config MSM_V2_TLMM
         bool
 
-config IOMMU_API
-        bool
-
 config MSM_SCM
         bool
 endif
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 38280ef4a2af..9929e4e11ea0 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -681,6 +681,3 @@ source "lib/Kconfig"
 
 config IOMMU_HELPER
         def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)
-
-config IOMMU_API
-        def_bool (DMAR)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index da349723d411..460d57370016 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -685,6 +685,7 @@ config AMD_IOMMU
         select SWIOTLB
         select PCI_MSI
         select PCI_IOV
+        select IOMMU_API
         depends on X86_64 && PCI && ACPI
         ---help---
           With this option you can enable support for AMD IOMMU hardware in
@@ -720,9 +721,6 @@ config SWIOTLB
 config IOMMU_HELPER
         def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
 
-config IOMMU_API
-        def_bool (AMD_IOMMU || DMAR)
-
 config MAXSMP
         bool "Enable Maximum number of SMP Processors and NUMA Nodes"
         depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
@@ -1945,6 +1943,7 @@ config PCI_CNB20LE_QUIRK
 config DMAR
         bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
         depends on PCI_MSI && ACPI && EXPERIMENTAL
+        select IOMMU_API
         help
           DMA remapping (DMAR) devices support enables independent address
           translations for Direct Memory Access (DMA) from devices.