Messages in this thread Patch in this message | | | From | Joerg Roedel <> | Subject | [PATCH 1/5] iommu: Add domain-attribute handlers | Date | Thu, 19 Jan 2012 15:30:01 +0100 |
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This patch introduces an extension to the iommu-api to get and set attributes for an iommu_domain. Two functions are introduced for this:
* iommu_domain_get_attr() * iommu_domain_set_attr()
These functions will be used to make the iommu-api suitable for GART-like IOMMUs and to implement hardware-specifc api-extensions.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> --- drivers/iommu/iommu.c | 20 ++++++++++++++++++++ include/linux/iommu.h | 25 +++++++++++++++++++++++++ 2 files changed, 45 insertions(+), 0 deletions(-)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 2198b2d..ef54718 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -341,3 +341,23 @@ int iommu_device_group(struct device *dev, unsigned int *groupid) return -ENODEV; } EXPORT_SYMBOL_GPL(iommu_device_group); + +int iommu_domain_get_attr(struct iommu_domain *domain, + enum iommu_attr attr, void *data) +{ + if (!domain->ops->domain_get_attr) + return -EINVAL; + + return domain->ops->domain_get_attr(domain, attr, data); +} +EXPORT_SYMBOL_GPL(iommu_domain_get_attr); + +int iommu_domain_set_attr(struct iommu_domain *domain, + enum iommu_attr attr, void *data) +{ + if (!domain->ops->domain_set_attr) + return -EINVAL; + + return domain->ops->domain_set_attr(domain, attr, data); +} +EXPORT_SYMBOL_GPL(iommu_domain_set_attr); diff --git a/include/linux/iommu.h b/include/linux/iommu.h index d937580..32d0de1 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -46,6 +46,10 @@ struct iommu_domain { #define IOMMU_CAP_CACHE_COHERENCY 0x1 #define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */ +enum iommu_attr { + DOMAIN_ATTR_MAX, +}; + #ifdef CONFIG_IOMMU_API /** @@ -75,6 +79,10 @@ struct iommu_ops { int (*domain_has_cap)(struct iommu_domain *domain, unsigned long cap); int (*device_group)(struct device *dev, unsigned int *groupid); + int (*domain_get_attr)(struct iommu_domain *domain, + enum iommu_attr attr, void *data); + int (*domain_set_attr)(struct iommu_domain *domain, + enum iommu_attr attr, void *data); unsigned long pgsize_bitmap; }; @@ -98,6 +106,11 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain, iommu_fault_handler_t handler); extern int iommu_device_group(struct device *dev, unsigned int *groupid); +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); + /** * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework * @domain: the iommu domain where the fault has happened @@ -200,6 +213,18 @@ static inline int iommu_device_group(struct device *dev, unsigned int *groupid) return -ENODEV; } +static inline int iommu_domain_get_attr(struct iommu_domain *domain, + enum iommu_attr attr, void *data) +{ + return -EINVAL; +} + +static inline int iommu_domain_set_attr(struct iommu_domain *domain, + enum iommu_attr attr, void *data) +{ + return -EINVAL; +} + #endif /* CONFIG_IOMMU_API */ #endif /* __LINUX_IOMMU_H */ -- 1.7.5.4
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