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iommu: Add sysfs bindings for struct iommu_device

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There is currently support for iommu sysfs bindings, but
those need to be implemented in the IOMMU drivers. Add a
more generic version of this by adding a struct device to
struct iommu_device and use that for the sysfs bindings.

Also convert the AMD and Intel IOMMU driver to make use of
it.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2017-02-01 16:56:46 +01:00
parent b0119e8708
commit 39ab9555c2
8 changed files with 62 additions and 70 deletions
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35
include/linux/iommu.h
View file

@ -209,14 +209,21 @@ struct iommu_ops {
* instance
* @list: Used by the iommu-core to keep a list of registered iommus
* @ops: iommu-ops for talking to this iommu
* @dev: struct device for sysfs handling
*/
struct iommu_device {
struct list_head list;
const struct iommu_ops *ops;
struct device dev;
};
int iommu_device_register(struct iommu_device *iommu);
void iommu_device_unregister(struct iommu_device *iommu);
int iommu_device_sysfs_add(struct iommu_device *iommu,
struct device *parent,
const struct attribute_group **groups,
const char *fmt, ...) __printf(4, 5);
void iommu_device_sysfs_remove(struct iommu_device *iommu);
static inline void iommu_device_set_ops(struct iommu_device *iommu,
const struct iommu_ops *ops)
@ -287,10 +294,6 @@ 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);
struct device *iommu_device_create(struct device *parent, void *drvdata,
const struct attribute_group **groups,
const char *fmt, ...) __printf(4, 5);
void iommu_device_destroy(struct device *dev);
int iommu_device_link(struct device *dev, struct device *link);
void iommu_device_unlink(struct device *dev, struct device *link);
@ -567,18 +570,6 @@ static inline int iommu_domain_set_attr(struct iommu_domain *domain,
return -EINVAL;
}
static inline struct device *iommu_device_create(struct device *parent,
void *drvdata,
const struct attribute_group **groups,
const char *fmt, ...)
{
return ERR_PTR(-ENODEV);
}
static inline void iommu_device_destroy(struct device *dev)
{
}
static inline int iommu_device_register(struct iommu_device *iommu)
{
return -ENODEV;
@ -593,6 +584,18 @@ static inline void iommu_device_unregister(struct iommu_device *iommu)
{
}
static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
struct device *parent,
const struct attribute_group **groups,
const char *fmt, ...)
{
return -ENODEV;
}
static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
{
}
static inline int iommu_device_link(struct device *dev, struct device *link)
{
return -EINVAL;