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authorJoerg Roedel <jroedel@suse.de>2017-02-01 13:23:08 +0100
committerJoerg Roedel <jroedel@suse.de>2017-02-10 13:44:57 +0100
commitb0119e870837dcd15a207b4701542ebac5d19b45 (patch)
tree07c547fed49f739a7d9b4a64c8163d9908db48e2 /drivers/iommu/iommu.c
parentc09e22d5370739e16463c113525df51b5980b1d5 (diff)
downloadlinux-b0119e870837dcd15a207b4701542ebac5d19b45.tar.bz2
iommu: Introduce new 'struct iommu_device'
This struct represents one hardware iommu in the iommu core code. For now it only has the iommu-ops associated with it, but that will be extended soon. The register/unregister interface is also added, as well as making use of it in the Intel and AMD IOMMU drivers. Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/iommu.c')
-rw-r--r--drivers/iommu/iommu.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index cc569b1b66a2..1dfd70ea27e4 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -77,6 +77,25 @@ struct iommu_group_attribute iommu_group_attr_##_name = \
#define to_iommu_group(_kobj) \
container_of(_kobj, struct iommu_group, kobj)
+static LIST_HEAD(iommu_device_list);
+static DEFINE_SPINLOCK(iommu_device_lock);
+
+int iommu_device_register(struct iommu_device *iommu)
+{
+ spin_lock(&iommu_device_lock);
+ list_add_tail(&iommu->list, &iommu_device_list);
+ spin_unlock(&iommu_device_lock);
+
+ return 0;
+}
+
+void iommu_device_unregister(struct iommu_device *iommu)
+{
+ spin_lock(&iommu_device_lock);
+ list_del(&iommu->list);
+ spin_unlock(&iommu_device_lock);
+}
+
static struct iommu_domain *__iommu_domain_alloc(struct bus_type *bus,
unsigned type);
static int __iommu_attach_device(struct iommu_domain *domain,