589 	struct ioctl_gntdev_map_grant_ref op;  in gntdev_ioctl_map_grant_ref()  local
593 	if (copy_from_user(&op, u, sizeof(op)) != 0)  in gntdev_ioctl_map_grant_ref()
595 	pr_debug("priv %p, add %d\n", priv, op.count);  in gntdev_ioctl_map_grant_ref()
596 	if (unlikely(op.count <= 0))  in gntdev_ioctl_map_grant_ref()
600 	map = gntdev_alloc_map(priv, op.count);  in gntdev_ioctl_map_grant_ref()
604 	if (unlikely(atomic_add_return(op.count, &pages_mapped) > limit)) {  in gntdev_ioctl_map_grant_ref()
611 			   sizeof(map->grants[0]) * op.count) != 0) {  in gntdev_ioctl_map_grant_ref()
618 	op.index = map->index << PAGE_SHIFT;  in gntdev_ioctl_map_grant_ref()
621 	if (copy_to_user(u, &op, sizeof(op)) != 0)  in gntdev_ioctl_map_grant_ref()
630 	struct ioctl_gntdev_unmap_grant_ref op;  in gntdev_ioctl_unmap_grant_ref()  local
634 	if (copy_from_user(&op, u, sizeof(op)) != 0)  in gntdev_ioctl_unmap_grant_ref()
636 	pr_debug("priv %p, del %d+%d\n", priv, (int)op.index, (int)op.count);  in gntdev_ioctl_unmap_grant_ref()
639 	map = gntdev_find_map_index(priv, op.index >> PAGE_SHIFT, op.count);  in gntdev_ioctl_unmap_grant_ref()
655 	struct ioctl_gntdev_get_offset_for_vaddr op;  in gntdev_ioctl_get_offset_for_vaddr()  local
660 	if (copy_from_user(&op, u, sizeof(op)) != 0)  in gntdev_ioctl_get_offset_for_vaddr()
662 	pr_debug("priv %p, offset for vaddr %lx\n", priv, (unsigned long)op.vaddr);  in gntdev_ioctl_get_offset_for_vaddr()
665 	vma = find_vma(current->mm, op.vaddr);  in gntdev_ioctl_get_offset_for_vaddr()
673 	op.offset = map->index << PAGE_SHIFT;  in gntdev_ioctl_get_offset_for_vaddr()
674 	op.count = map->count;  in gntdev_ioctl_get_offset_for_vaddr()
680 	if (rv == 0 && copy_to_user(u, &op, sizeof(op)) != 0)  in gntdev_ioctl_get_offset_for_vaddr()
687 	struct ioctl_gntdev_unmap_notify op;  in gntdev_ioctl_notify()  local
693 	if (copy_from_user(&op, u, sizeof(op)))  in gntdev_ioctl_notify()
696 	if (op.action & ~(UNMAP_NOTIFY_CLEAR_BYTE|UNMAP_NOTIFY_SEND_EVENT))  in gntdev_ioctl_notify()
706 	if (op.action & UNMAP_NOTIFY_SEND_EVENT) {  in gntdev_ioctl_notify()
707 		if (evtchn_get(op.event_channel_port))  in gntdev_ioctl_notify()
711 	out_flags = op.action;  in gntdev_ioctl_notify()
712 	out_event = op.event_channel_port;  in gntdev_ioctl_notify()
719 		if (op.index >= begin && op.index < end)  in gntdev_ioctl_notify()
726 	if ((op.action & UNMAP_NOTIFY_CLEAR_BYTE) &&  in gntdev_ioctl_notify()
735 	map->notify.flags = op.action;  in gntdev_ioctl_notify()
736 	map->notify.addr = op.index - (map->index << PAGE_SHIFT);  in gntdev_ioctl_notify()
737 	map->notify.event = op.event_channel_port;  in gntdev_ioctl_notify()