iommu: Introduce iommu_capable API function
This function will replace the current iommu_domain_has_cap function and clean up the interface while at it. Signed-off-by: Joerg Roedel <jroedel@suse.de>
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@ -817,6 +817,15 @@ bool iommu_present(struct bus_type *bus)
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}
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EXPORT_SYMBOL_GPL(iommu_present);
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bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
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{
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if (!bus->iommu_ops || !bus->iommu_ops->capable)
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return false;
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return bus->iommu_ops->capable(cap);
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}
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EXPORT_SYMBOL_GPL(iommu_capable);
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/**
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* iommu_set_fault_handler() - set a fault handler for an iommu domain
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* @domain: iommu domain
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@ -950,10 +959,13 @@ EXPORT_SYMBOL_GPL(iommu_iova_to_phys);
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int iommu_domain_has_cap(struct iommu_domain *domain,
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enum iommu_cap cap)
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{
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if (unlikely(domain->ops->domain_has_cap == NULL))
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return 0;
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if (domain->ops->domain_has_cap != NULL)
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return domain->ops->domain_has_cap(domain, cap);
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return domain->ops->domain_has_cap(domain, cap);
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if (domain->ops->capable != NULL)
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return domain->ops->capable(cap);
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return 0;
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}
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EXPORT_SYMBOL_GPL(iommu_domain_has_cap);
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@ -105,6 +105,7 @@ enum iommu_attr {
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* @pgsize_bitmap: bitmap of supported page sizes
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*/
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struct iommu_ops {
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bool (*capable)(enum iommu_cap);
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int (*domain_init)(struct iommu_domain *domain);
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void (*domain_destroy)(struct iommu_domain *domain);
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int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
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@ -145,6 +146,7 @@ struct iommu_ops {
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extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
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extern bool iommu_present(struct bus_type *bus);
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extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
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extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
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extern struct iommu_group *iommu_group_get_by_id(int id);
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extern void iommu_domain_free(struct iommu_domain *domain);
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@ -253,6 +255,11 @@ static inline bool iommu_present(struct bus_type *bus)
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return false;
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}
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static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
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{
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return false;
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}
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static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
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{
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return NULL;
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