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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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45
drivers/iommu/iommu-sysfs.c
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@@ -50,54 +50,45 @@ static int __init iommu_dev_init(void)
postcore_initcall(iommu_dev_init);
/*
* Create an IOMMU device and return a pointer to it. IOMMU specific
* attributes can be provided as an attribute group, allowing a unique
* namespace per IOMMU type.
* Init the struct device for the IOMMU. IOMMU specific attributes can
* be provided as an attribute group, allowing a unique namespace per
* IOMMU type.
*/
struct device *iommu_device_create(struct device *parent, void *drvdata,
const struct attribute_group **groups,
const char *fmt, ...)
int iommu_device_sysfs_add(struct iommu_device *iommu,
struct device *parent,
const struct attribute_group **groups,
const char *fmt, ...)
{
struct device *dev;
va_list vargs;
int ret;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return ERR_PTR(-ENOMEM);
device_initialize(&iommu->dev);
device_initialize(dev);
dev->class = &iommu_class;
dev->parent = parent;
dev->groups = groups;
dev_set_drvdata(dev, drvdata);
iommu->dev.class = &iommu_class;
iommu->dev.parent = parent;
iommu->dev.groups = groups;
va_start(vargs, fmt);
ret = kobject_set_name_vargs(&dev->kobj, fmt, vargs);
ret = kobject_set_name_vargs(&iommu->dev.kobj, fmt, vargs);
va_end(vargs);
if (ret)
goto error;
ret = device_add(dev);
ret = device_add(&iommu->dev);
if (ret)
goto error;
return dev;
return 0;
error:
put_device(dev);
return ERR_PTR(ret);
put_device(&iommu->dev);
return ret;
}
void iommu_device_destroy(struct device *dev)
void iommu_device_sysfs_remove(struct iommu_device *iommu)
{
if (!dev || IS_ERR(dev))
return;
device_unregister(dev);
device_unregister(&iommu->dev);
}
/*
* IOMMU drivers can indicate a device is managed by a given IOMMU using
* this interface. A link to the device will be created in the "devices"