linux-4.4.1/iommu_attach_device()

参照元†

• linux-4.4.1/do_iommu_attach()

説明†

• パス: linux-4.4.1/drivers/iommu/iommu.c

• FIXME: これは何？
  • 説明

引数†

• struct iommu_domain *domain
  • linux-4.4.1/iommu_domain
• struct device *dev
  • linux-4.4.1/device

返り値†

• int

参考†

実装†

int iommu_attach_device(struct iommu_domain *domain, struct device *dev)
{
	struct iommu_group *group;
	int ret;

• • linux-4.4.1/iommu_group

	group = iommu_group_get(dev);
	/* FIXME: Remove this when groups a mandatory for iommu drivers */
	if (group == NULL)
		return __iommu_attach_device(domain, dev);

• • linux-4.4.1/iommu_group_get()
  • linux-4.4.1/__iommu_attach_device()

	/*
	 * We have a group - lock it to make sure the device-count doesn't
	 * change while we are attaching
	 */
	mutex_lock(&group->mutex);
	ret = -EINVAL;
	if (iommu_group_device_count(group) != 1)
		goto out_unlock;

• • linux-4.4.1/mutex_lock()
  • linux-4.4.1/iommu_group_device_count()

	ret = __iommu_attach_group(domain, group);

• • linux-4.4.1/__iommu_attach_group()

out_unlock:
	mutex_unlock(&group->mutex);
	iommu_group_put(group);

• • linux-4.4.1/mutex_unlock()
  • linux-4.4.1/iommu_group_put()

	return ret;
}
EXPORT_SYMBOL_GPL(iommu_attach_device);

• • linux-4.4.1/EXPORT_SYMBOL_GPL()

コメント†

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• katsuhiro

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