Release 4.14 drivers/iommu/iommu-sysfs.c
/*
* IOMMU sysfs class support
*
* Copyright (C) 2014 Red Hat, Inc. All rights reserved.
* Author: Alex Williamson <alex.williamson@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/device.h>
#include <linux/iommu.h>
#include <linux/module.h>
#include <linux/slab.h>
/*
* We provide a common class "devices" group which initially has no attributes.
* As devices are added to the IOMMU, we'll add links to the group.
*/
static struct attribute *devices_attr[] = {
NULL,
};
static const struct attribute_group iommu_devices_attr_group = {
.name = "devices",
.attrs = devices_attr,
};
static const struct attribute_group *iommu_dev_groups[] = {
&iommu_devices_attr_group,
NULL,
};
static void iommu_release_device(struct device *dev)
{
kfree(dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alex Williamson | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static struct class iommu_class = {
.name = "iommu",
.dev_release = iommu_release_device,
.dev_groups = iommu_dev_groups,
};
static int __init iommu_dev_init(void)
{
return class_register(&iommu_class);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alex Williamson | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
postcore_initcall(iommu_dev_init);
/*
* Init the struct device for the IOMMU. IOMMU specific attributes can
* be provided as an attribute group, allowing a unique namespace per
* IOMMU type.
*/
int iommu_device_sysfs_add(struct iommu_device *iommu,
struct device *parent,
const struct attribute_group **groups,
const char *fmt, ...)
{
va_list vargs;
int ret;
iommu->dev = kzalloc(sizeof(*iommu->dev), GFP_KERNEL);
if (!iommu->dev)
return -ENOMEM;
device_initialize(iommu->dev);
iommu->dev->class = &iommu_class;
iommu->dev->parent = parent;
iommu->dev->groups = groups;
va_start(vargs, fmt);
ret = kobject_set_name_vargs(&iommu->dev->kobj, fmt, vargs);
va_end(vargs);
if (ret)
goto error;
ret = device_add(iommu->dev);
if (ret)
goto error;
dev_set_drvdata(iommu->dev, iommu);
return 0;
error:
put_device(iommu->dev);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alex Williamson | 108 | 63.53% | 1 | 33.33% |
| Joerg Roedel | 62 | 36.47% | 2 | 66.67% |
| Total | 170 | 100.00% | 3 | 100.00% |
void iommu_device_sysfs_remove(struct iommu_device *iommu)
{
dev_set_drvdata(iommu->dev, NULL);
device_unregister(iommu->dev);
iommu->dev = NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 20 | 62.50% | 2 | 66.67% |
| Alex Williamson | 12 | 37.50% | 1 | 33.33% |
| Total | 32 | 100.00% | 3 | 100.00% |
/*
* 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"
* directory of the IOMMU device in sysfs and an "iommu" link will be
* created under the linked device, pointing back at the IOMMU device.
*/
int iommu_device_link(struct iommu_device *iommu, struct device *link)
{
int ret;
if (!iommu || IS_ERR(iommu))
return -ENODEV;
ret = sysfs_add_link_to_group(&iommu->dev->kobj, "devices",
&link->kobj, dev_name(link));
if (ret)
return ret;
ret = sysfs_create_link_nowarn(&link->kobj, &iommu->dev->kobj, "iommu");
if (ret)
sysfs_remove_link_from_group(&iommu->dev->kobj, "devices",
dev_name(link));
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alex Williamson | 93 | 87.74% | 1 | 33.33% |
| Joerg Roedel | 13 | 12.26% | 2 | 66.67% |
| Total | 106 | 100.00% | 3 | 100.00% |
void iommu_device_unlink(struct iommu_device *iommu, struct device *link)
{
if (!iommu || IS_ERR(iommu))
return;
sysfs_remove_link(&link->kobj, "iommu");
sysfs_remove_link_from_group(&iommu->dev->kobj, "devices", dev_name(link));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alex Williamson | 46 | 86.79% | 1 | 33.33% |
| Joerg Roedel | 7 | 13.21% | 2 | 66.67% |
| Total | 53 | 100.00% | 3 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alex Williamson | 374 | 77.92% | 1 | 20.00% |
| Joerg Roedel | 106 | 22.08% | 4 | 80.00% |
| Total | 480 | 100.00% | 5 | 100.00% |
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