diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/device.h | 3 | ||||
| -rw-r--r-- | include/linux/iommu.h | 39 |
2 files changed, 42 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h index 38f02814d53a..bc41e87a969b 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -41,6 +41,7 @@ struct device_node; struct fwnode_handle; struct iommu_ops; struct iommu_group; +struct iommu_fwspec; struct bus_attribute { struct attribute attr; @@ -765,6 +766,7 @@ struct device_dma_parameters { * gone away. This should be set by the allocator of the * device (i.e. the bus driver that discovered the device). * @iommu_group: IOMMU group the device belongs to. + * @iommu_fwspec: IOMMU-specific properties supplied by firmware. * * @offline_disabled: If set, the device is permanently online. * @offline: Set after successful invocation of bus type's .offline(). @@ -849,6 +851,7 @@ struct device { void (*release)(struct device *dev); struct iommu_group *iommu_group; + struct iommu_fwspec *iommu_fwspec; bool offline_disabled:1; bool offline:1; diff --git a/include/linux/iommu.h b/include/linux/iommu.h index a35fb8b42e1a..436dc21318af 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -331,10 +331,32 @@ extern struct iommu_group *pci_device_group(struct device *dev); /* Generic device grouping function */ extern struct iommu_group *generic_device_group(struct device *dev); +/** + * struct iommu_fwspec - per-device IOMMU instance data + * @ops: ops for this device's IOMMU + * @iommu_fwnode: firmware handle for this device's IOMMU + * @iommu_priv: IOMMU driver private data for this device + * @num_ids: number of associated device IDs + * @ids: IDs which this device may present to the IOMMU + */ +struct iommu_fwspec { + const struct iommu_ops *ops; + struct fwnode_handle *iommu_fwnode; + void *iommu_priv; + unsigned int num_ids; + u32 ids[1]; +}; + +int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode, + const struct iommu_ops *ops); +void iommu_fwspec_free(struct device *dev); +int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids); + #else /* CONFIG_IOMMU_API */ struct iommu_ops {}; struct iommu_group {}; +struct iommu_fwspec {}; static inline bool iommu_present(struct bus_type *bus) { @@ -541,6 +563,23 @@ static inline void iommu_device_unlink(struct device *dev, struct device *link) { } +static inline int iommu_fwspec_init(struct device *dev, + struct fwnode_handle *iommu_fwnode, + const struct iommu_ops *ops) +{ + return -ENODEV; +} + +static inline void iommu_fwspec_free(struct device *dev) +{ +} + +static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids, + int num_ids) +{ + return -ENODEV; +} + #endif /* CONFIG_IOMMU_API */ #endif /* __LINUX_IOMMU_H */ |