drivers/vfio/container.c

81 				      const struct vfio_iommu_driver *driver)
85 	return container->noiommu == (driver->ops == &vfio_noiommu_ops);
89  * IOMMU driver registration
93 	struct vfio_iommu_driver *driver, *tmp;
98 	driver = kzalloc(sizeof(*driver), GFP_KERNEL);
99 	if (!driver)
102 	driver->ops = ops;
110 			kfree(driver);
115 	list_add(&driver->vfio_next, &vfio.iommu_drivers_list);
125 	struct vfio_iommu_driver *driver;
128 	list_for_each_entry(driver, &vfio.iommu_drivers_list, vfio_next) {
129 		if (driver->ops == ops) {
130 			list_del(&driver->vfio_next);
132 			kfree(driver);
188 	struct vfio_iommu_driver *driver;
193 	driver = container->iommu_driver;
199 		 * If no driver is set, poll all registered drivers for
201 		 * a driver is already set, further queries will be passed
202 		 * only to that driver.
204 		if (!driver) {
206 			list_for_each_entry(driver, &vfio.iommu_drivers_list,
211 							       driver))
213 				if (!try_module_get(driver->ops->owner))
216 				ret = driver->ops->ioctl(NULL,
219 				module_put(driver->ops->owner);
225 			ret = driver->ops->ioctl(container->iommu_data,
236 					  struct vfio_iommu_driver *driver,
243 		ret = driver->ops->attach_group(data, group->iommu_group,
254 		driver->ops->detach_group(data, group->iommu_group);
263 	struct vfio_iommu_driver *driver;
282 	list_for_each_entry(driver, &vfio.iommu_drivers_list, vfio_next) {
285 		if (!vfio_iommu_driver_allowed(container, driver))
287 		if (!try_module_get(driver->ops->owner))
292 		 * so test which iommu driver reported support for this
294 		 * magic, allowing a single driver to support multiple
297 		if (driver->ops->ioctl(NULL, VFIO_CHECK_EXTENSION, arg) <= 0) {
298 			module_put(driver->ops->owner);
302 		data = driver->ops->open(arg);
305 			module_put(driver->ops->owner);
309 		ret = __vfio_container_attach_groups(container, driver, data);
311 			driver->ops->release(data);
312 			module_put(driver->ops->owner);
316 		container->iommu_driver = driver;
331 	struct vfio_iommu_driver *driver;
349 		driver = container->iommu_driver;
352 		if (driver) /* passthrough all unrecognized ioctls */
353 			ret = driver->ops->ioctl(data, cmd, arg);
419 	struct vfio_iommu_driver *driver;
442 	driver = container->iommu_driver;
443 	if (driver) {
444 		ret = driver->ops->attach_group(container->iommu_data,
471 	struct vfio_iommu_driver *driver;
478 	driver = container->iommu_driver;
479 	if (driver)
480 		driver->ops->detach_group(container->iommu_data,
491 	if (driver && list_empty(&container->group_list)) {
492 		driver->ops->release(container->iommu_data);
493 		module_put(driver->ops->owner);
537 	struct vfio_iommu_driver *driver = container->iommu_driver;
542 	if (unlikely(!driver || !driver->ops->pin_pages))
544 	return driver->ops->pin_pages(container->iommu_data, iommu_group, iova,
565 	struct vfio_iommu_driver *driver = container->iommu_driver;
567 	if (unlikely(!driver || !driver->ops->dma_rw))
569 	return driver->ops->dma_rw(container->iommu_data, iova, data, len,