Lines Matching refs:group
26 static struct vfio_device *vfio_device_get_from_name(struct vfio_group *group, in vfio_device_get_from_name() argument
31 mutex_lock(&group->device_lock); in vfio_device_get_from_name()
32 list_for_each_entry(it, &group->device_list, group_next) { in vfio_device_get_from_name()
50 mutex_unlock(&group->device_lock); in vfio_device_get_from_name()
58 static bool vfio_group_has_iommu(struct vfio_group *group) in vfio_group_has_iommu() argument
60 lockdep_assert_held(&group->group_lock); in vfio_group_has_iommu()
65 WARN_ON(!group->container != !group->container_users); in vfio_group_has_iommu()
67 return group->container || group->iommufd; in vfio_group_has_iommu()
76 static int vfio_group_ioctl_unset_container(struct vfio_group *group) in vfio_group_ioctl_unset_container() argument
80 mutex_lock(&group->group_lock); in vfio_group_ioctl_unset_container()
81 if (!vfio_group_has_iommu(group)) { in vfio_group_ioctl_unset_container()
85 if (group->container) { in vfio_group_ioctl_unset_container()
86 if (group->container_users != 1) { in vfio_group_ioctl_unset_container()
90 vfio_group_detach_container(group); in vfio_group_ioctl_unset_container()
92 if (group->iommufd) { in vfio_group_ioctl_unset_container()
93 iommufd_ctx_put(group->iommufd); in vfio_group_ioctl_unset_container()
94 group->iommufd = NULL; in vfio_group_ioctl_unset_container()
98 mutex_unlock(&group->group_lock); in vfio_group_ioctl_unset_container()
102 static int vfio_group_ioctl_set_container(struct vfio_group *group, in vfio_group_ioctl_set_container() argument
118 mutex_lock(&group->group_lock); in vfio_group_ioctl_set_container()
119 if (vfio_group_has_iommu(group)) { in vfio_group_ioctl_set_container()
123 if (!group->iommu_group) { in vfio_group_ioctl_set_container()
130 ret = vfio_container_attach_group(container, group); in vfio_group_ioctl_set_container()
137 group->type == VFIO_NO_IOMMU) in vfio_group_ioctl_set_container()
147 group->iommufd = iommufd; in vfio_group_ioctl_set_container()
155 mutex_unlock(&group->group_lock); in vfio_group_ioctl_set_container()
162 spin_lock(&device->group->kvm_ref_lock); in vfio_device_group_get_kvm_safe()
163 vfio_device_get_kvm_safe(device, device->group->kvm); in vfio_device_group_get_kvm_safe()
164 spin_unlock(&device->group->kvm_ref_lock); in vfio_device_group_get_kvm_safe()
172 mutex_lock(&device->group->group_lock); in vfio_df_group_open()
173 if (!vfio_group_has_iommu(device->group)) { in vfio_df_group_open()
189 df->iommufd = device->group->iommufd; in vfio_df_group_open()
221 mutex_unlock(&device->group->group_lock); in vfio_df_group_open()
232 mutex_unlock(&device->group->group_lock); in vfio_df_group_open()
240 mutex_lock(&device->group->group_lock); in vfio_df_group_close()
250 mutex_unlock(&device->group->group_lock); in vfio_df_group_close()
265 df->group = device->group; in vfio_device_open_file()
289 if (device->group->type == VFIO_NO_IOMMU) in vfio_device_open_file()
306 static int vfio_group_ioctl_get_device_fd(struct vfio_group *group, in vfio_group_ioctl_get_device_fd() argument
319 device = vfio_device_get_from_name(group, buf); in vfio_group_ioctl_get_device_fd()
346 static int vfio_group_ioctl_get_status(struct vfio_group *group, in vfio_group_ioctl_get_status() argument
360 mutex_lock(&group->group_lock); in vfio_group_ioctl_get_status()
361 if (!group->iommu_group) { in vfio_group_ioctl_get_status()
362 mutex_unlock(&group->group_lock); in vfio_group_ioctl_get_status()
373 if (vfio_group_has_iommu(group)) in vfio_group_ioctl_get_status()
376 else if (!iommu_group_dma_owner_claimed(group->iommu_group)) in vfio_group_ioctl_get_status()
378 mutex_unlock(&group->group_lock); in vfio_group_ioctl_get_status()
388 struct vfio_group *group = filep->private_data; in vfio_group_fops_unl_ioctl() local
393 return vfio_group_ioctl_get_device_fd(group, uarg); in vfio_group_fops_unl_ioctl()
395 return vfio_group_ioctl_get_status(group, uarg); in vfio_group_fops_unl_ioctl()
397 return vfio_group_ioctl_set_container(group, uarg); in vfio_group_fops_unl_ioctl()
399 return vfio_group_ioctl_unset_container(group); in vfio_group_fops_unl_ioctl()
407 struct vfio_group *group = device->group; in vfio_device_block_group() local
410 mutex_lock(&group->group_lock); in vfio_device_block_group()
411 if (group->opened_file) { in vfio_device_block_group()
416 group->cdev_device_open_cnt++; in vfio_device_block_group()
419 mutex_unlock(&group->group_lock); in vfio_device_block_group()
425 struct vfio_group *group = device->group; in vfio_device_unblock_group() local
427 mutex_lock(&group->group_lock); in vfio_device_unblock_group()
428 group->cdev_device_open_cnt--; in vfio_device_unblock_group()
429 mutex_unlock(&group->group_lock); in vfio_device_unblock_group()
434 struct vfio_group *group = in vfio_group_fops_open() local
438 mutex_lock(&group->group_lock); in vfio_group_fops_open()
444 if (refcount_read(&group->drivers) == 0) { in vfio_group_fops_open()
449 if (group->type == VFIO_NO_IOMMU && !capable(CAP_SYS_RAWIO)) { in vfio_group_fops_open()
454 if (group->cdev_device_open_cnt) { in vfio_group_fops_open()
462 if (group->opened_file) { in vfio_group_fops_open()
466 group->opened_file = filep; in vfio_group_fops_open()
467 filep->private_data = group; in vfio_group_fops_open()
470 mutex_unlock(&group->group_lock); in vfio_group_fops_open()
476 struct vfio_group *group = filep->private_data; in vfio_group_fops_release() local
480 mutex_lock(&group->group_lock); in vfio_group_fops_release()
485 WARN_ON(group->notifier.head); in vfio_group_fops_release()
486 if (group->container) in vfio_group_fops_release()
487 vfio_group_detach_container(group); in vfio_group_fops_release()
488 if (group->iommufd) { in vfio_group_fops_release()
489 iommufd_ctx_put(group->iommufd); in vfio_group_fops_release()
490 group->iommufd = NULL; in vfio_group_fops_release()
492 group->opened_file = NULL; in vfio_group_fops_release()
493 mutex_unlock(&group->group_lock); in vfio_group_fops_release()
511 struct vfio_group *group; in vfio_group_find_from_iommu() local
519 list_for_each_entry(group, &vfio.group_list, vfio_next) { in vfio_group_find_from_iommu()
520 if (group->iommu_group == iommu_group) in vfio_group_find_from_iommu()
521 return group; in vfio_group_find_from_iommu()
528 struct vfio_group *group = container_of(dev, struct vfio_group, dev); in vfio_group_release() local
530 mutex_destroy(&group->device_lock); in vfio_group_release()
531 mutex_destroy(&group->group_lock); in vfio_group_release()
532 WARN_ON(group->iommu_group); in vfio_group_release()
533 WARN_ON(group->cdev_device_open_cnt); in vfio_group_release()
534 ida_free(&vfio.group_ida, MINOR(group->dev.devt)); in vfio_group_release()
535 kfree(group); in vfio_group_release()
541 struct vfio_group *group; in vfio_group_alloc() local
544 group = kzalloc(sizeof(*group), GFP_KERNEL); in vfio_group_alloc()
545 if (!group) in vfio_group_alloc()
550 kfree(group); in vfio_group_alloc()
554 device_initialize(&group->dev); in vfio_group_alloc()
555 group->dev.devt = MKDEV(MAJOR(vfio.group_devt), minor); in vfio_group_alloc()
556 group->dev.class = vfio.class; in vfio_group_alloc()
557 group->dev.release = vfio_group_release; in vfio_group_alloc()
558 cdev_init(&group->cdev, &vfio_group_fops); in vfio_group_alloc()
559 group->cdev.owner = THIS_MODULE; in vfio_group_alloc()
561 refcount_set(&group->drivers, 1); in vfio_group_alloc()
562 mutex_init(&group->group_lock); in vfio_group_alloc()
563 spin_lock_init(&group->kvm_ref_lock); in vfio_group_alloc()
564 INIT_LIST_HEAD(&group->device_list); in vfio_group_alloc()
565 mutex_init(&group->device_lock); in vfio_group_alloc()
566 group->iommu_group = iommu_group; in vfio_group_alloc()
569 group->type = type; in vfio_group_alloc()
570 BLOCKING_INIT_NOTIFIER_HEAD(&group->notifier); in vfio_group_alloc()
572 return group; in vfio_group_alloc()
578 struct vfio_group *group; in vfio_create_group() local
584 group = vfio_group_alloc(iommu_group, type); in vfio_create_group()
585 if (IS_ERR(group)) in vfio_create_group()
586 return group; in vfio_create_group()
588 err = dev_set_name(&group->dev, "%s%d", in vfio_create_group()
589 group->type == VFIO_NO_IOMMU ? "noiommu-" : "", in vfio_create_group()
596 err = cdev_device_add(&group->cdev, &group->dev); in vfio_create_group()
602 list_add(&group->vfio_next, &vfio.group_list); in vfio_create_group()
604 return group; in vfio_create_group()
607 put_device(&group->dev); in vfio_create_group()
615 struct vfio_group *group; in vfio_noiommu_group_alloc() local
630 group = vfio_create_group(iommu_group, type); in vfio_noiommu_group_alloc()
632 if (IS_ERR(group)) { in vfio_noiommu_group_alloc()
633 ret = PTR_ERR(group); in vfio_noiommu_group_alloc()
637 return group; in vfio_noiommu_group_alloc()
646 static bool vfio_group_has_device(struct vfio_group *group, struct device *dev) in vfio_group_has_device() argument
650 mutex_lock(&group->device_lock); in vfio_group_has_device()
651 list_for_each_entry(device, &group->device_list, group_next) { in vfio_group_has_device()
653 mutex_unlock(&group->device_lock); in vfio_group_has_device()
657 mutex_unlock(&group->device_lock); in vfio_group_has_device()
664 struct vfio_group *group; in vfio_group_find_or_alloc() local
674 group = vfio_noiommu_group_alloc(dev, VFIO_NO_IOMMU); in vfio_group_find_or_alloc()
675 if (!IS_ERR(group)) { in vfio_group_find_or_alloc()
679 return group; in vfio_group_find_or_alloc()
686 group = vfio_group_find_from_iommu(iommu_group); in vfio_group_find_or_alloc()
687 if (group) { in vfio_group_find_or_alloc()
688 if (WARN_ON(vfio_group_has_device(group, dev))) in vfio_group_find_or_alloc()
689 group = ERR_PTR(-EINVAL); in vfio_group_find_or_alloc()
691 refcount_inc(&group->drivers); in vfio_group_find_or_alloc()
693 group = vfio_create_group(iommu_group, VFIO_IOMMU); in vfio_group_find_or_alloc()
699 return group; in vfio_group_find_or_alloc()
705 struct vfio_group *group; in vfio_device_set_group() local
708 group = vfio_group_find_or_alloc(device->dev); in vfio_device_set_group()
710 group = vfio_noiommu_group_alloc(device->dev, type); in vfio_device_set_group()
712 if (IS_ERR(group)) in vfio_device_set_group()
713 return PTR_ERR(group); in vfio_device_set_group()
716 device->group = group; in vfio_device_set_group()
722 struct vfio_group *group = device->group; in vfio_device_remove_group() local
725 if (group->type == VFIO_NO_IOMMU || group->type == VFIO_EMULATED_IOMMU) in vfio_device_remove_group()
729 if (!refcount_dec_and_mutex_lock(&group->drivers, &vfio.group_lock)) in vfio_device_remove_group()
731 list_del(&group->vfio_next); in vfio_device_remove_group()
739 cdev_device_del(&group->cdev, &group->dev); in vfio_device_remove_group()
741 mutex_lock(&group->group_lock); in vfio_device_remove_group()
748 WARN_ON(!list_empty(&group->device_list)); in vfio_device_remove_group()
749 WARN_ON(group->notifier.head); in vfio_device_remove_group()
756 if (group->container) in vfio_device_remove_group()
757 vfio_group_detach_container(group); in vfio_device_remove_group()
758 iommu_group = group->iommu_group; in vfio_device_remove_group()
759 group->iommu_group = NULL; in vfio_device_remove_group()
760 mutex_unlock(&group->group_lock); in vfio_device_remove_group()
764 put_device(&group->dev); in vfio_device_remove_group()
769 mutex_lock(&device->group->device_lock); in vfio_device_group_register()
770 list_add(&device->group_next, &device->group->device_list); in vfio_device_group_register()
771 mutex_unlock(&device->group->device_lock); in vfio_device_group_register()
776 mutex_lock(&device->group->device_lock); in vfio_device_group_unregister()
778 mutex_unlock(&device->group->device_lock); in vfio_device_group_unregister()
783 struct vfio_group *group = device->group; in vfio_device_group_use_iommu() local
786 lockdep_assert_held(&group->group_lock); in vfio_device_group_use_iommu()
788 if (WARN_ON(!group->container)) in vfio_device_group_use_iommu()
791 ret = vfio_group_use_container(group); in vfio_device_group_use_iommu()
800 struct vfio_group *group = device->group; in vfio_device_group_unuse_iommu() local
802 lockdep_assert_held(&group->group_lock); in vfio_device_group_unuse_iommu()
804 if (WARN_ON(!group->container)) in vfio_device_group_unuse_iommu()
808 vfio_group_unuse_container(group); in vfio_device_group_unuse_iommu()
813 return device->group->container; in vfio_device_has_container()
818 struct vfio_group *group = file->private_data; in vfio_group_from_file() local
822 return group; in vfio_group_from_file()
835 struct vfio_group *group = vfio_group_from_file(file); in vfio_file_iommu_group() local
841 if (!group) in vfio_file_iommu_group()
844 mutex_lock(&group->group_lock); in vfio_file_iommu_group()
845 if (group->iommu_group) { in vfio_file_iommu_group()
846 iommu_group = group->iommu_group; in vfio_file_iommu_group()
849 mutex_unlock(&group->group_lock); in vfio_file_iommu_group()
864 bool vfio_group_enforced_coherent(struct vfio_group *group) in vfio_group_enforced_coherent() argument
875 mutex_lock(&group->device_lock); in vfio_group_enforced_coherent()
876 list_for_each_entry(device, &group->device_list, group_next) { in vfio_group_enforced_coherent()
883 mutex_unlock(&group->device_lock); in vfio_group_enforced_coherent()
887 void vfio_group_set_kvm(struct vfio_group *group, struct kvm *kvm) in vfio_group_set_kvm() argument
889 spin_lock(&group->kvm_ref_lock); in vfio_group_set_kvm()
890 group->kvm = kvm; in vfio_group_set_kvm()
891 spin_unlock(&group->kvm_ref_lock); in vfio_group_set_kvm()
903 struct vfio_group *group = vfio_group_from_file(file); in vfio_file_has_dev() local
905 if (!group) in vfio_file_has_dev()
908 return group == device->group; in vfio_file_has_dev()