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| author | Joerg Roedel <joerg.roedel@amd.com> | 2012-01-26 22:40:52 +0400 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2012-07-11 14:12:14 +0400 |
| commit | 0cd76dd13bdd2f7f02a2dc931e808e92b191082f (patch) | |
| tree | 210df4b7fda8f81121fd8fb1f89a57e3e358060e /include | |
| parent | bd0a521e88aa7a06ae7aabaed7ae196ed4ad867a (diff) | |
| download | linux-0cd76dd13bdd2f7f02a2dc931e808e92b191082f.tar.xz | |
iommu: Add domain-attribute handlers
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/iommu.h | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 450293f6d68b..0eef096183e8 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -47,6 +47,10 @@ 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 /** @@ -59,7 +63,8 @@ struct 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 - * @commit: commit iommu domain + * @domain_get_attr: Query domain attributes + * @domain_set_attr: Change domain attributes * @pgsize_bitmap: bitmap of supported page sizes */ struct iommu_ops { @@ -76,6 +81,10 @@ 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; }; @@ -99,6 +108,11 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain, iommu_fault_handler_t handler, void *token); 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 @@ -202,6 +216,18 @@ 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 */ |