drivers/vfio/group.c

123 	if (!group->iommu_group) {
361 	if (!group->iommu_group) {
376 	else if (!iommu_group_dma_owner_claimed(group->iommu_group))
509 vfio_group_find_from_iommu(struct iommu_group *iommu_group)
516 	 * group->iommu_group from the vfio.group_list cannot be NULL
520 		if (group->iommu_group == iommu_group)
532 	WARN_ON(group->iommu_group);
538 static struct vfio_group *vfio_group_alloc(struct iommu_group *iommu_group,
566 	group->iommu_group = iommu_group;
568 	iommu_group_ref_get(iommu_group);
575 static struct vfio_group *vfio_create_group(struct iommu_group *iommu_group,
584 	group = vfio_group_alloc(iommu_group, type);
590 			   iommu_group_id(iommu_group));
614 	struct iommu_group *iommu_group;
618 	iommu_group = iommu_group_alloc();
619 	if (IS_ERR(iommu_group))
620 		return ERR_CAST(iommu_group);
622 	ret = iommu_group_set_name(iommu_group, "vfio-noiommu");
625 	ret = iommu_group_add_device(iommu_group, dev);
630 	group = vfio_create_group(iommu_group, type);
636 	iommu_group_put(iommu_group);
642 	iommu_group_put(iommu_group);
663 	struct iommu_group *iommu_group;
666 	iommu_group = iommu_group_get(dev);
667 	if (!iommu_group && vfio_noiommu) {
682 	if (!iommu_group)
686 	group = vfio_group_find_from_iommu(iommu_group);
693 		group = vfio_create_group(iommu_group, VFIO_IOMMU);
697 	/* The vfio_group holds a reference to the iommu_group */
698 	iommu_group_put(iommu_group);
723 	struct iommu_group *iommu_group;
752 	 * Revoke all users of group->iommu_group. At this point we know there
754 	 * iommu_group to NULL blocks all new users.
758 	iommu_group = group->iommu_group;
759 	group->iommu_group = NULL;
763 	iommu_group_put(iommu_group);
826  * vfio_file_iommu_group - Return the struct iommu_group for the vfio group file
829  * The returned iommu_group is valid as long as a ref is held on the file. This
833 struct iommu_group *vfio_file_iommu_group(struct file *file)
836 	struct iommu_group *iommu_group = NULL;
845 	if (group->iommu_group) {
846 		iommu_group = group->iommu_group;
847 		iommu_group_ref_get(iommu_group);
850 	return iommu_group;