Merge tag 'iommu-updates-v3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull iommu updates from Joerg Roedel:
 "This time with:

   - support for the generic PCI device alias code in x86 IOMMU drivers

   - a new sysfs interface for IOMMUs

   - preparations for hotplug support in the Intel IOMMU driver

   - change the AMD IOMMUv2 driver to not hold references to core data
     structures like mm_struct or task_struct.  Rely on mmu_notifers
     instead.

   - removal of the OMAP IOVMM interface, all users of it are converted
     to DMA-API now

   - make the struct iommu_ops const everywhere

   - initial PCI support for the ARM SMMU driver

   - there is now a generic device tree binding documented for ARM
     IOMMUs

   - various fixes and cleanups all over the place

  Also included are some changes to the OMAP code, which are acked by
  the maintainer"

* tag 'iommu-updates-v3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (67 commits)
  devicetree: Add generic IOMMU device tree bindings
  iommu/vt-d: Fix race setting IRQ CPU affinity while freeing IRQ
  iommu/amd: Fix 2 typos in comments
  iommu/amd: Fix device_state reference counting
  iommu/amd: Remove change_pte mmu_notifier call-back
  iommu/amd: Don't set pasid_state->mm to NULL in unbind_pasid
  iommu/exynos: Select ARM_DMA_USE_IOMMU
  iommu/vt-d: Exclude devices using RMRRs from IOMMU API domains
  iommu/omap: Remove platform data da_start and da_end fields
  ARM: omap: Don't set iommu pdata da_start and da_end fields
  iommu/omap: Remove virtual memory manager
  iommu/vt-d: Fix issue in computing domain's iommu_snooping flag
  iommu/vt-d: Introduce helper function iova_size() to improve code readability
  iommu/vt-d: Introduce helper domain_pfn_within_range() to simplify code
  iommu/vt-d: Simplify intel_unmap_sg() and kill duplicated code
  iommu/vt-d: Change iommu_enable/disable_translation to return void
  iommu/vt-d: Simplify include/linux/dmar.h
  iommu/vt-d: Avoid freeing virtual machine domain in free_dmar_iommu()
  iommu/vt-d: Fix possible invalid memory access caused by free_dmar_iommu()
  iommu/vt-d: Allocate dynamic domain id for virtual domains only
  ...

8 files changed, 66 insertions, 76 deletions

diff --git a/include/linux/amd-iommu.h b/include/linux/amd-iommu.h
index 15f6b9edd0b1..2b08e79f5100 100644
--- a/include/linux/amd-iommu.h
+++ b/include/linux/amd-iommu.h
@@ -119,6 +119,13 @@ typedef int (*amd_iommu_invalid_ppr_cb)(struct pci_dev *pdev,
 extern int amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev,
                                         amd_iommu_invalid_ppr_cb cb);
 
+#define PPR_FAULT_EXEC  (1 << 1)
+#define PPR_FAULT_READ  (1 << 2)
+#define PPR_FAULT_WRITE (1 << 5)
+#define PPR_FAULT_USER  (1 << 6)
+#define PPR_FAULT_RSVD  (1 << 7)
+#define PPR_FAULT_GN    (1 << 8)
+
 /**
  * amd_iommu_device_info() - Get information about IOMMUv2 support of a
  *                           PCI device
diff --git a/include/linux/device.h b/include/linux/device.h
index b0aab0d6be7e..43d183aeb25b 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -124,7 +124,7 @@ struct bus_type {
 
         const struct dev_pm_ops *pm;
 
-        struct iommu_ops *iommu_ops;
+        const struct iommu_ops *iommu_ops;
 
         struct subsys_private *p;
         struct lock_class_key lock_key;
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index 23c8db129560..1deece46a0ca 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -114,22 +114,30 @@ extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info,
 /* Intel IOMMU detection */
 extern int detect_intel_iommu(void);
 extern int enable_drhd_fault_handling(void);
-#else
-struct dmar_pci_notify_info;
-static inline int detect_intel_iommu(void)
+
+#ifdef CONFIG_INTEL_IOMMU
+extern int iommu_detected, no_iommu;
+extern int intel_iommu_init(void);
+extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header);
+extern int dmar_parse_one_atsr(struct acpi_dmar_header *header);
+extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
+#else /* !CONFIG_INTEL_IOMMU: */
+static inline int intel_iommu_init(void) { return -ENODEV; }
+static inline int dmar_parse_one_rmrr(struct acpi_dmar_header *header)
 {
-        return -ENODEV;
+        return 0;
 }
-
-static inline int dmar_table_init(void)
+static inline int dmar_parse_one_atsr(struct acpi_dmar_header *header)
 {
-        return -ENODEV;
+        return 0;
 }
-static inline int enable_drhd_fault_handling(void)
+static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
 {
-        return -1;
+        return 0;
 }
-#endif /* !CONFIG_DMAR_TABLE */
+#endif /* CONFIG_INTEL_IOMMU */
+
+#endif /* CONFIG_DMAR_TABLE */
 
 struct irte {
         union {
@@ -177,26 +185,4 @@ extern int dmar_set_interrupt(struct intel_iommu *iommu);
 extern irqreturn_t dmar_fault(int irq, void *dev_id);
 extern int arch_setup_dmar_msi(unsigned int irq);
 
-#ifdef CONFIG_INTEL_IOMMU
-extern int iommu_detected, no_iommu;
-extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header);
-extern int dmar_parse_one_atsr(struct acpi_dmar_header *header);
-extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
-extern int intel_iommu_init(void);
-#else /* !CONFIG_INTEL_IOMMU: */
-static inline int intel_iommu_init(void) { return -ENODEV; }
-static inline int dmar_parse_one_rmrr(struct acpi_dmar_header *header)
-{
-        return 0;
-}
-static inline int dmar_parse_one_atsr(struct acpi_dmar_header *header)
-{
-        return 0;
-}
-static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
-{
-        return 0;
-}
-#endif /* CONFIG_INTEL_IOMMU */
-
 #endif /* __DMAR_H__ */
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 0a2da5188217..a65208a8fe18 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -336,6 +336,7 @@ struct intel_iommu {
 #ifdef CONFIG_IRQ_REMAP
         struct ir_table *ir_table;      /* Interrupt remapping info */
 #endif
+        struct device   *iommu_dev; /* IOMMU-sysfs device */
         int             node;
 };
 
@@ -365,4 +366,6 @@ extern int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu);
 
 extern int dmar_ir_support(void);
 
+extern const struct attribute_group *intel_iommu_groups[];
+
 #endif
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index b96a5b2136e4..20f9a527922a 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -50,7 +50,7 @@ struct iommu_domain_geometry {
 };
 
 struct iommu_domain {
-        struct iommu_ops *ops;
+        const struct iommu_ops *ops;
         void *priv;
         iommu_fault_handler_t handler;
         void *handler_token;
@@ -140,7 +140,7 @@ struct iommu_ops {
 #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER        5 /* Pre Driver unbind */
 #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER       6 /* Post Driver unbind */
 
-extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops);
+extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
 extern bool iommu_present(struct bus_type *bus);
 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
 extern struct iommu_group *iommu_group_get_by_id(int id);
@@ -181,11 +181,18 @@ extern int iommu_group_register_notifier(struct iommu_group *group,
 extern int iommu_group_unregister_notifier(struct iommu_group *group,
                                            struct notifier_block *nb);
 extern int iommu_group_id(struct iommu_group *group);
+extern struct iommu_group *iommu_group_get_for_dev(struct device *dev);
 
 extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
                                  void *data);
 extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
                                  void *data);
+struct device *iommu_device_create(struct device *parent, void *drvdata,
+                                   const struct attribute_group **groups,
+                                   const char *fmt, ...);
+void iommu_device_destroy(struct device *dev);
+int iommu_device_link(struct device *dev, struct device *link);
+void iommu_device_unlink(struct device *dev, struct device *link);
 
 /* Window handling function prototypes */
 extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
@@ -396,6 +403,27 @@ static inline int iommu_domain_set_attr(struct iommu_domain *domain,
         return -EINVAL;
 }
 
+static inline struct device *iommu_device_create(struct device *parent,
+                                        void *drvdata,
+                                        const struct attribute_group **groups,
+                                        const char *fmt, ...)
+{
+        return ERR_PTR(-ENODEV);
+}
+
+static inline void iommu_device_destroy(struct device *dev)
+{
+}
+
+static inline int iommu_device_link(struct device *dev, struct device *link)
+{
+        return -EINVAL;
+}
+
+static inline void iommu_device_unlink(struct device *dev, struct device *link)
+{
+}
+
 #endif /* CONFIG_IOMMU_API */
 
 #endif /* __LINUX_IOMMU_H */
diff --git a/include/linux/iova.h b/include/linux/iova.h
index 3277f4711349..19e81d5ccb6d 100644
--- a/include/linux/iova.h
+++ b/include/linux/iova.h
@@ -34,6 +34,11 @@ struct iova_domain {
         unsigned long   dma_32bit_pfn;
 };
 
+static inline unsigned long iova_size(struct iova *iova)
+{
+        return iova->pfn_hi - iova->pfn_lo + 1;
+}
+
 struct iova *alloc_iova_mem(void);
 void free_iova_mem(struct iova *iova);
 void free_iova(struct iova_domain *iovad, unsigned long pfn);
diff --git a/include/linux/omap-iommu.h b/include/linux/omap-iommu.h
index cac78de09c07..c1aede46718b 100644
--- a/include/linux/omap-iommu.h
+++ b/include/linux/omap-iommu.h
@@ -10,41 +10,8 @@
  * published by the Free Software Foundation.
  */
 
-#ifndef _INTEL_IOMMU_H_
-#define _INTEL_IOMMU_H_
-
-struct iovm_struct {
-        struct omap_iommu       *iommu; /* iommu object which this belongs to */
-        u32                     da_start; /* area definition */
-        u32                     da_end;
-        u32                     flags; /* IOVMF_: see below */
-        struct list_head        list; /* linked in ascending order */
-        const struct sg_table   *sgt; /* keep 'page' <-> 'da' mapping */
-        void                    *va; /* mpu side mapped address */
-};
-
-#define MMU_RAM_ENDIAN_SHIFT    9
-#define MMU_RAM_ENDIAN_LITTLE   (0 << MMU_RAM_ENDIAN_SHIFT)
-#define MMU_RAM_ELSZ_8          (0 << MMU_RAM_ELSZ_SHIFT)
-#define IOVMF_ENDIAN_LITTLE     MMU_RAM_ENDIAN_LITTLE
-#define MMU_RAM_ELSZ_SHIFT      7
-#define IOVMF_ELSZ_8            MMU_RAM_ELSZ_8
-
-struct iommu_domain;
-
-extern struct iovm_struct *omap_find_iovm_area(struct device *dev, u32 da);
-extern u32
-omap_iommu_vmap(struct iommu_domain *domain, struct device *dev, u32 da,
-                        const struct sg_table *sgt, u32 flags);
-extern struct sg_table *omap_iommu_vunmap(struct iommu_domain *domain,
-                                struct device *dev, u32 da);
-extern u32
-omap_iommu_vmalloc(struct iommu_domain *domain, struct device *dev,
-                                u32 da, size_t bytes, u32 flags);
-extern void
-omap_iommu_vfree(struct iommu_domain *domain, struct device *dev,
-                                const u32 da);
-extern void *omap_da_to_va(struct device *dev, u32 da);
+#ifndef _OMAP_IOMMU_H_
+#define _OMAP_IOMMU_H_
 
 extern void omap_iommu_save_ctx(struct device *dev);
 extern void omap_iommu_restore_ctx(struct device *dev);
diff --git a/include/linux/platform_data/iommu-omap.h b/include/linux/platform_data/iommu-omap.h
index 5b429c43a297..54a0a9582fad 100644
--- a/include/linux/platform_data/iommu-omap.h
+++ b/include/linux/platform_data/iommu-omap.h
@@ -31,14 +31,10 @@ struct omap_iommu_arch_data {
 
 /**
  * struct omap_mmu_dev_attr - OMAP mmu device attributes for omap_hwmod
- * @da_start:           device address where the va space starts.
- * @da_end:             device address where the va space ends.
  * @nr_tlb_entries:     number of entries supported by the translation
  *                      look-aside buffer (TLB).
  */
 struct omap_mmu_dev_attr {
-        u32 da_start;
-        u32 da_end;
         int nr_tlb_entries;
 };
 
@@ -46,8 +42,6 @@ struct iommu_platform_data {
         const char *name;
         const char *reset_name;
         int nr_tlb_entries;
-        u32 da_start;
-        u32 da_end;
 
         int (*assert_reset)(struct platform_device *pdev, const char *name);
         int (*deassert_reset)(struct platform_device *pdev, const char *name);