Merge tag 'iommu-updates-v3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU Updates from Joerg Roedel:
 "Besides some fixes and cleanups in the code there are three more
  important changes to point out this time:

	* New IOMMU driver for the ARM SHMOBILE platform
	* An IOMMU-API extension for non-paging IOMMUs (required for
	  upcoming PAMU driver)
	* Rework of the way the Tegra IOMMU driver accesses its
	  registetrs - register windows are easier to extend now.

  There are also a few changes to non-iommu code, but that is acked by
  the respective maintainers."

* tag 'iommu-updates-v3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (23 commits)
  iommu/tegra: assume CONFIG_OF in SMMU driver
  iommu/tegra: assume CONFIG_OF in gart driver
  iommu/amd: Remove redundant NULL check before dma_ops_domain_free().
  iommu/amd: Initialize device table after dma_ops
  iommu/vt-d: Zero out allocated memory in dmar_enable_qi
  iommu/tegra: smmu: Fix incorrect mask for regbase
  iommu/exynos: Make exynos_sysmmu_disable static
  ARM: mach-shmobile: r8a7740: Add IPMMU device
  ARM: mach-shmobile: sh73a0: Add IPMMU device
  ARM: mach-shmobile: sh7372: Add IPMMU device
  iommu/shmobile: Add iommu driver for Renesas IPMMU modules
  iommu: Add DOMAIN_ATTR_WINDOWS domain attribute
  iommu: Add domain window handling functions
  iommu: Implement DOMAIN_ATTR_PAGING attribute
  iommu: Check for valid pgsize_bitmap in iommu_map/unmap
  iommu: Make sure DOMAIN_ATTR_MAX is really the maximum
  iommu/tegra: smmu: Change SMMU's dependency on ARCH_TEGRA
  iommu/tegra: smmu: Use helper function to check for valid register offset
  iommu/tegra: smmu: Support variable MMIO ranges/blocks
  iommu/tegra: Add missing spinlock initialization
  ...

1 files changed, 29 insertions, 1 deletions

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index f3b99e1c104..ba3b8a98a04 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -58,8 +58,10 @@ struct iommu_domain {
 #define IOMMU_CAP_INTR_REMAP		0x2	/* isolates device intrs */
 
 enum iommu_attr {
-	DOMAIN_ATTR_MAX,
 	DOMAIN_ATTR_GEOMETRY,
+	DOMAIN_ATTR_PAGING,
+	DOMAIN_ATTR_WINDOWS,
+	DOMAIN_ATTR_MAX,
 };
 
 #ifdef CONFIG_IOMMU_API
@@ -100,6 +102,16 @@ struct iommu_ops {
 			       enum iommu_attr attr, void *data);
 	int (*domain_set_attr)(struct iommu_domain *domain,
 			       enum iommu_attr attr, void *data);
+
+	/* Window handling functions */
+	int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,
+				    phys_addr_t paddr, u64 size);
+	void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr);
+	/* Set the numer of window per domain */
+	int (*domain_set_windows)(struct iommu_domain *domain, u32 w_count);
+	/* Get the numer of window per domain */
+	u32 (*domain_get_windows)(struct iommu_domain *domain);
+
 	unsigned long pgsize_bitmap;
 };
 
@@ -157,6 +169,10 @@ extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
 extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
 				 void *data);
 
+/* Window handling function prototypes */
+extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
+				      phys_addr_t offset, u64 size);
+extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);
 /**
  * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework
  * @domain: the iommu domain where the fault has happened
@@ -239,6 +255,18 @@ static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova,
 	return -ENODEV;
 }
 
+static inline int iommu_domain_window_enable(struct iommu_domain *domain,
+					     u32 wnd_nr, phys_addr_t paddr,
+					     u64 size)
+{
+	return -ENODEV;
+}
+
+static inline void iommu_domain_window_disable(struct iommu_domain *domain,
+					       u32 wnd_nr)
+{
+}
+
 static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
 					     unsigned long iova)
 {