From b0119e870837dcd15a207b4701542ebac5d19b45 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Wed, 1 Feb 2017 13:23:08 +0100 Subject: 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 --- drivers/iommu/iommu.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'drivers/iommu/iommu.c') 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, -- cgit v1.2.3