Merge tag 'iommu-updates-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU updates from Joerg Roedel:
 "This pull-request includes:

   - change in the IOMMU-API to convert the former iommu_domain_capable
     function to just iommu_capable

   - various fixes in handling RMRR ranges for the VT-d driver (one fix
     requires a device driver core change which was acked by Greg KH)

   - the AMD IOMMU driver now assigns and deassigns complete alias
     groups to fix issues with devices using the wrong PCI request-id

   - MMU-401 support for the ARM SMMU driver

   - multi-master IOMMU group support for the ARM SMMU driver

   - various other small fixes all over the place"

* tag 'iommu-updates-v3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (41 commits)
  iommu/vt-d: Work around broken RMRR firmware entries
  iommu/vt-d: Store bus information in RMRR PCI device path
  iommu/vt-d: Only remove domain when device is removed
  driver core: Add BUS_NOTIFY_REMOVED_DEVICE event
  iommu/amd: Fix devid mapping for ivrs_ioapic override
  iommu/irq_remapping: Fix the regression of hpet irq remapping
  iommu: Fix bus notifier breakage
  iommu/amd: Split init_iommu_group() from iommu_init_device()
  iommu: Rework iommu_group_get_for_pci_dev()
  iommu: Make of_device_id array const
  amd_iommu: do not dereference a NULL pointer address.
  iommu/omap: Remove omap_iommu unused owner field
  iommu: Remove iommu_domain_has_cap() API function
  IB/usnic: Convert to use new iommu_capable() API function
  vfio: Convert to use new iommu_capable() API function
  kvm: iommu: Convert to use new iommu_capable() API function
  iommu/tegra: Convert to iommu_capable() API function
  iommu/msm: Convert to iommu_capable() API function
  iommu/vt-d: Convert to iommu_capable() API function
  iommu/fsl: Convert to iommu_capable() API function
  ...

3 files changed, 25 insertions, 19 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index a608e237f0a8..ce1f21608b16 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -181,13 +181,14 @@ extern int bus_unregister_notifier(struct bus_type *bus,
  * with the device lock held in the core, so be careful.
  */
 #define BUS_NOTIFY_ADD_DEVICE           0x00000001 /* device added */
-#define BUS_NOTIFY_DEL_DEVICE           0x00000002 /* device removed */
-#define BUS_NOTIFY_BIND_DRIVER          0x00000003 /* driver about to be
+#define BUS_NOTIFY_DEL_DEVICE           0x00000002 /* device to be removed */
+#define BUS_NOTIFY_REMOVED_DEVICE       0x00000003 /* device removed */
+#define BUS_NOTIFY_BIND_DRIVER          0x00000004 /* driver about to be
                                                       bound */
-#define BUS_NOTIFY_BOUND_DRIVER         0x00000004 /* driver bound to device */
-#define BUS_NOTIFY_UNBIND_DRIVER        0x00000005 /* driver about to be
+#define BUS_NOTIFY_BOUND_DRIVER         0x00000005 /* driver bound to device */
+#define BUS_NOTIFY_UNBIND_DRIVER        0x00000006 /* driver about to be
                                                       unbound */
-#define BUS_NOTIFY_UNBOUND_DRIVER       0x00000006 /* driver is unbound
+#define BUS_NOTIFY_UNBOUND_DRIVER       0x00000007 /* driver is unbound
                                                       from the device */
 
 extern struct kset *bus_get_kset(struct bus_type *bus);
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index 1deece46a0ca..593fff99e6bf 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -56,13 +56,19 @@ struct dmar_drhd_unit {
         struct intel_iommu *iommu;
 };
 
+struct dmar_pci_path {
+        u8 bus;
+        u8 device;
+        u8 function;
+};
+
 struct dmar_pci_notify_info {
         struct pci_dev                  *dev;
         unsigned long                   event;
         int                             bus;
         u16                             seg;
         u16                             level;
-        struct acpi_dmar_pci_path       path[];
+        struct dmar_pci_path            path[];
 }  __attribute__((packed));
 
 extern struct rw_semaphore dmar_global_lock;
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 7b02bcc85b9e..e6a7c9ff72f2 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -57,8 +57,11 @@ struct iommu_domain {
         struct iommu_domain_geometry geometry;
 };
 
-#define IOMMU_CAP_CACHE_COHERENCY       0x1
-#define IOMMU_CAP_INTR_REMAP            0x2     /* isolates device intrs */
+enum iommu_cap {
+        IOMMU_CAP_CACHE_COHERENCY,      /* IOMMU can enforce cache coherent DMA
+                                           transactions */
+        IOMMU_CAP_INTR_REMAP,           /* IOMMU supports interrupt isolation */
+};
 
 /*
  * Following constraints are specifc to FSL_PAMUV1:
@@ -95,7 +98,6 @@ enum iommu_attr {
  * @map: map a physically contiguous memory region to an iommu domain
  * @unmap: unmap a physically contiguous memory region from an iommu domain
  * @iova_to_phys: translate iova to physical address
- * @domain_has_cap: domain capabilities query
  * @add_device: add device to iommu grouping
  * @remove_device: remove device from iommu grouping
  * @domain_get_attr: Query domain attributes
@@ -103,6 +105,7 @@ enum iommu_attr {
  * @pgsize_bitmap: bitmap of supported page sizes
  */
 struct iommu_ops {
+        bool (*capable)(enum iommu_cap);
         int (*domain_init)(struct iommu_domain *domain);
         void (*domain_destroy)(struct iommu_domain *domain);
         int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
@@ -112,8 +115,6 @@ struct iommu_ops {
         size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
                      size_t size);
         phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
-        int (*domain_has_cap)(struct iommu_domain *domain,
-                              unsigned long cap);
         int (*add_device)(struct device *dev);
         void (*remove_device)(struct device *dev);
         int (*device_group)(struct device *dev, unsigned int *groupid);
@@ -143,6 +144,7 @@ struct iommu_ops {
 
 extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
 extern bool iommu_present(struct bus_type *bus);
+extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
 extern struct iommu_group *iommu_group_get_by_id(int id);
 extern void iommu_domain_free(struct iommu_domain *domain);
@@ -155,8 +157,6 @@ extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
 extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
                        size_t size);
 extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
-extern int iommu_domain_has_cap(struct iommu_domain *domain,
-                                unsigned long cap);
 extern void iommu_set_fault_handler(struct iommu_domain *domain,
                         iommu_fault_handler_t handler, void *token);
 
@@ -251,6 +251,11 @@ static inline bool iommu_present(struct bus_type *bus)
         return false;
 }
 
+static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
+{
+        return false;
+}
+
 static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
 {
         return NULL;
@@ -305,12 +310,6 @@ static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_ad
         return 0;
 }
 
-static inline int iommu_domain_has_cap(struct iommu_domain *domain,
-                                       unsigned long cap)
-{
-        return 0;
-}
-
 static inline void iommu_set_fault_handler(struct iommu_domain *domain,
                                 iommu_fault_handler_t handler, void *token)
 {