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Release 4.11 drivers/iommu/iommu-sysfs.c

Directory: drivers/iommu
/*
 * 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

PersonTokensPropCommitsCommitProp
Alex Williamson16100.00%1100.00%
Total16100.00%1100.00%

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

PersonTokensPropCommitsCommitProp
Alex Williamson16100.00%1100.00%
Total16100.00%1100.00%

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; 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; return 0; error: put_device(&iommu->dev); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Alex Williamson10879.41%150.00%
Joerg Roedel2820.59%150.00%
Total136100.00%2100.00%


void iommu_device_sysfs_remove(struct iommu_device *iommu) { device_unregister(&iommu->dev); }

Contributors

PersonTokensPropCommitsCommitProp
Alex Williamson1266.67%150.00%
Joerg Roedel633.33%150.00%
Total18100.00%2100.00%

/* * 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

PersonTokensPropCommitsCommitProp
Alex Williamson9387.74%150.00%
Joerg Roedel1312.26%150.00%
Total106100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Alex Williamson4686.79%150.00%
Joerg Roedel713.21%150.00%
Total53100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Alex Williamson37486.57%125.00%
Joerg Roedel5813.43%375.00%
Total432100.00%4100.00%
Directory: drivers/iommu
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