Lines Matching full: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()
56 * VFIO Group fd, /dev/vfio/$GROUP
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()
73 * the group, we know that still exists, therefore the only valid
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
117 mutex_lock(&group->group_lock); in vfio_group_ioctl_set_container()
118 if (vfio_group_has_iommu(group)) { in vfio_group_ioctl_set_container()
122 if (!group->iommu_group) { in vfio_group_ioctl_set_container()
129 ret = vfio_container_attach_group(container, group); in vfio_group_ioctl_set_container()
136 group->type == VFIO_NO_IOMMU) in vfio_group_ioctl_set_container()
146 group->iommufd = iommufd; in vfio_group_ioctl_set_container()
154 mutex_unlock(&group->group_lock); in vfio_group_ioctl_set_container()
160 spin_lock(&device->group->kvm_ref_lock); in vfio_device_group_get_kvm_safe()
161 vfio_device_get_kvm_safe(device, device->group->kvm); in vfio_device_group_get_kvm_safe()
162 spin_unlock(&device->group->kvm_ref_lock); in vfio_device_group_get_kvm_safe()
170 mutex_lock(&device->group->group_lock); in vfio_df_group_open()
171 if (!vfio_group_has_iommu(device->group)) { in vfio_df_group_open()
180 * associated with the group (if there is one) and obtain a reference in vfio_df_group_open()
187 df->iommufd = device->group->iommufd; in vfio_df_group_open()
219 mutex_unlock(&device->group->group_lock); in vfio_df_group_open()
230 mutex_unlock(&device->group->group_lock); in vfio_df_group_open()
238 mutex_lock(&device->group->group_lock); in vfio_df_group_close()
248 mutex_unlock(&device->group->group_lock); in vfio_df_group_close()
263 df->group = device->group; in vfio_device_open_file()
294 if (device->group->type == VFIO_NO_IOMMU) in vfio_device_open_file()
311 static int vfio_group_ioctl_get_device_fd(struct vfio_group *group, in vfio_group_ioctl_get_device_fd() argument
324 device = vfio_device_get_from_name(group, buf); in vfio_group_ioctl_get_device_fd()
351 static int vfio_group_ioctl_get_status(struct vfio_group *group, in vfio_group_ioctl_get_status() argument
365 mutex_lock(&group->group_lock); in vfio_group_ioctl_get_status()
366 if (!group->iommu_group) { in vfio_group_ioctl_get_status()
367 mutex_unlock(&group->group_lock); in vfio_group_ioctl_get_status()
378 if (vfio_group_has_iommu(group)) in vfio_group_ioctl_get_status()
381 else if (!iommu_group_dma_owner_claimed(group->iommu_group)) in vfio_group_ioctl_get_status()
383 mutex_unlock(&group->group_lock); in vfio_group_ioctl_get_status()
393 struct vfio_group *group = filep->private_data; in vfio_group_fops_unl_ioctl() local
398 return vfio_group_ioctl_get_device_fd(group, uarg); in vfio_group_fops_unl_ioctl()
400 return vfio_group_ioctl_get_status(group, uarg); in vfio_group_fops_unl_ioctl()
402 return vfio_group_ioctl_set_container(group, uarg); in vfio_group_fops_unl_ioctl()
404 return vfio_group_ioctl_unset_container(group); in vfio_group_fops_unl_ioctl()
412 struct vfio_group *group = device->group; in vfio_device_block_group() local
415 mutex_lock(&group->group_lock); in vfio_device_block_group()
416 if (group->opened_file) { in vfio_device_block_group()
421 group->cdev_device_open_cnt++; in vfio_device_block_group()
424 mutex_unlock(&group->group_lock); in vfio_device_block_group()
430 struct vfio_group *group = device->group; in vfio_device_unblock_group() local
432 mutex_lock(&group->group_lock); in vfio_device_unblock_group()
433 group->cdev_device_open_cnt--; in vfio_device_unblock_group()
434 mutex_unlock(&group->group_lock); in vfio_device_unblock_group()
439 struct vfio_group *group = in vfio_group_fops_open() local
443 mutex_lock(&group->group_lock); in vfio_group_fops_open()
447 * will be stable at 0 under the group rwsem in vfio_group_fops_open()
449 if (refcount_read(&group->drivers) == 0) { in vfio_group_fops_open()
454 if (group->type == VFIO_NO_IOMMU && !capable(CAP_SYS_RAWIO)) { in vfio_group_fops_open()
459 if (group->cdev_device_open_cnt) { in vfio_group_fops_open()
465 * Do we need multiple instances of the group open? Seems not. in vfio_group_fops_open()
467 if (group->opened_file) { in vfio_group_fops_open()
471 group->opened_file = filep; in vfio_group_fops_open()
472 filep->private_data = group; in vfio_group_fops_open()
475 mutex_unlock(&group->group_lock); in vfio_group_fops_open()
481 struct vfio_group *group = filep->private_data; in vfio_group_fops_release() local
485 mutex_lock(&group->group_lock); in vfio_group_fops_release()
487 * Device FDs hold a group file reference, therefore the group release in vfio_group_fops_release()
490 WARN_ON(group->notifier.head); in vfio_group_fops_release()
491 if (group->container) in vfio_group_fops_release()
492 vfio_group_detach_container(group); in vfio_group_fops_release()
493 if (group->iommufd) { in vfio_group_fops_release()
494 iommufd_ctx_put(group->iommufd); in vfio_group_fops_release()
495 group->iommufd = NULL; in vfio_group_fops_release()
497 group->opened_file = NULL; in vfio_group_fops_release()
498 mutex_unlock(&group->group_lock); in vfio_group_fops_release()
511 * Group objects - create, release, get, put, search
516 struct vfio_group *group; in vfio_group_find_from_iommu() local
521 * group->iommu_group from the vfio.group_list cannot be NULL in vfio_group_find_from_iommu()
524 list_for_each_entry(group, &vfio.group_list, vfio_next) { in vfio_group_find_from_iommu()
525 if (group->iommu_group == iommu_group) in vfio_group_find_from_iommu()
526 return group; in vfio_group_find_from_iommu()
533 struct vfio_group *group = container_of(dev, struct vfio_group, dev); in vfio_group_release() local
535 mutex_destroy(&group->device_lock); in vfio_group_release()
536 mutex_destroy(&group->group_lock); in vfio_group_release()
537 WARN_ON(group->iommu_group); in vfio_group_release()
538 WARN_ON(group->cdev_device_open_cnt); in vfio_group_release()
539 ida_free(&vfio.group_ida, MINOR(group->dev.devt)); in vfio_group_release()
540 kfree(group); in vfio_group_release()
546 struct vfio_group *group; in vfio_group_alloc() local
549 group = kzalloc(sizeof(*group), GFP_KERNEL); in vfio_group_alloc()
550 if (!group) in vfio_group_alloc()
555 kfree(group); in vfio_group_alloc()
559 device_initialize(&group->dev); in vfio_group_alloc()
560 group->dev.devt = MKDEV(MAJOR(vfio.group_devt), minor); in vfio_group_alloc()
561 group->dev.class = vfio.class; in vfio_group_alloc()
562 group->dev.release = vfio_group_release; in vfio_group_alloc()
563 cdev_init(&group->cdev, &vfio_group_fops); in vfio_group_alloc()
564 group->cdev.owner = THIS_MODULE; in vfio_group_alloc()
566 refcount_set(&group->drivers, 1); in vfio_group_alloc()
567 mutex_init(&group->group_lock); in vfio_group_alloc()
568 spin_lock_init(&group->kvm_ref_lock); in vfio_group_alloc()
569 INIT_LIST_HEAD(&group->device_list); in vfio_group_alloc()
570 mutex_init(&group->device_lock); in vfio_group_alloc()
571 group->iommu_group = iommu_group; in vfio_group_alloc()
574 group->type = type; in vfio_group_alloc()
575 BLOCKING_INIT_NOTIFIER_HEAD(&group->notifier); in vfio_group_alloc()
577 return group; in vfio_group_alloc()
583 struct vfio_group *group; in vfio_create_group() local
589 group = vfio_group_alloc(iommu_group, type); in vfio_create_group()
590 if (IS_ERR(group)) in vfio_create_group()
591 return group; in vfio_create_group()
593 err = dev_set_name(&group->dev, "%s%d", in vfio_create_group()
594 group->type == VFIO_NO_IOMMU ? "noiommu-" : "", in vfio_create_group()
601 err = cdev_device_add(&group->cdev, &group->dev); in vfio_create_group()
607 list_add(&group->vfio_next, &vfio.group_list); in vfio_create_group()
609 return group; in vfio_create_group()
612 put_device(&group->dev); in vfio_create_group()
620 struct vfio_group *group; in vfio_noiommu_group_alloc() local
635 group = vfio_create_group(iommu_group, type); in vfio_noiommu_group_alloc()
637 if (IS_ERR(group)) { in vfio_noiommu_group_alloc()
638 ret = PTR_ERR(group); in vfio_noiommu_group_alloc()
642 return group; in vfio_noiommu_group_alloc()
651 static bool vfio_group_has_device(struct vfio_group *group, struct device *dev) in vfio_group_has_device() argument
655 mutex_lock(&group->device_lock); in vfio_group_has_device()
656 list_for_each_entry(device, &group->device_list, group_next) { in vfio_group_has_device()
658 mutex_unlock(&group->device_lock); in vfio_group_has_device()
662 mutex_unlock(&group->device_lock); in vfio_group_has_device()
669 struct vfio_group *group; in vfio_group_find_or_alloc() local
674 * With noiommu enabled, create an IOMMU group for devices that in vfio_group_find_or_alloc()
679 group = vfio_noiommu_group_alloc(dev, VFIO_NO_IOMMU); in vfio_group_find_or_alloc()
680 if (!IS_ERR(group)) { in vfio_group_find_or_alloc()
682 dev_warn(dev, "Adding kernel taint for vfio-noiommu group on device\n"); in vfio_group_find_or_alloc()
684 return group; in vfio_group_find_or_alloc()
691 group = vfio_group_find_from_iommu(iommu_group); in vfio_group_find_or_alloc()
692 if (group) { in vfio_group_find_or_alloc()
693 if (WARN_ON(vfio_group_has_device(group, dev))) in vfio_group_find_or_alloc()
694 group = ERR_PTR(-EINVAL); in vfio_group_find_or_alloc()
696 refcount_inc(&group->drivers); in vfio_group_find_or_alloc()
698 group = vfio_create_group(iommu_group, VFIO_IOMMU); in vfio_group_find_or_alloc()
704 return group; in vfio_group_find_or_alloc()
710 struct vfio_group *group; in vfio_device_set_group() local
713 group = vfio_group_find_or_alloc(device->dev); in vfio_device_set_group()
715 group = vfio_noiommu_group_alloc(device->dev, type); in vfio_device_set_group()
717 if (IS_ERR(group)) in vfio_device_set_group()
718 return PTR_ERR(group); in vfio_device_set_group()
720 /* Our reference on group is moved to the device */ in vfio_device_set_group()
721 device->group = group; in vfio_device_set_group()
727 struct vfio_group *group = device->group; in vfio_device_remove_group() local
730 if (group->type == VFIO_NO_IOMMU || group->type == VFIO_EMULATED_IOMMU) in vfio_device_remove_group()
734 if (!refcount_dec_and_mutex_lock(&group->drivers, &vfio.group_lock)) in vfio_device_remove_group()
736 list_del(&group->vfio_next); in vfio_device_remove_group()
739 * We could concurrently probe another driver in the group that might in vfio_device_remove_group()
744 cdev_device_del(&group->cdev, &group->dev); in vfio_device_remove_group()
746 mutex_lock(&group->group_lock); in vfio_device_remove_group()
751 * properly hold the group reference. in vfio_device_remove_group()
753 WARN_ON(!list_empty(&group->device_list)); in vfio_device_remove_group()
754 WARN_ON(group->notifier.head); in vfio_device_remove_group()
757 * Revoke all users of group->iommu_group. At this point we know there in vfio_device_remove_group()
761 if (group->container) in vfio_device_remove_group()
762 vfio_group_detach_container(group); in vfio_device_remove_group()
763 iommu_group = group->iommu_group; in vfio_device_remove_group()
764 group->iommu_group = NULL; in vfio_device_remove_group()
765 mutex_unlock(&group->group_lock); in vfio_device_remove_group()
769 put_device(&group->dev); in vfio_device_remove_group()
774 mutex_lock(&device->group->device_lock); in vfio_device_group_register()
775 list_add(&device->group_next, &device->group->device_list); in vfio_device_group_register()
776 mutex_unlock(&device->group->device_lock); in vfio_device_group_register()
781 mutex_lock(&device->group->device_lock); in vfio_device_group_unregister()
783 mutex_unlock(&device->group->device_lock); in vfio_device_group_unregister()
788 struct vfio_group *group = device->group; in vfio_device_group_use_iommu() local
791 lockdep_assert_held(&group->group_lock); in vfio_device_group_use_iommu()
793 if (WARN_ON(!group->container)) in vfio_device_group_use_iommu()
796 ret = vfio_group_use_container(group); in vfio_device_group_use_iommu()
805 struct vfio_group *group = device->group; in vfio_device_group_unuse_iommu() local
807 lockdep_assert_held(&group->group_lock); in vfio_device_group_unuse_iommu()
809 if (WARN_ON(!group->container)) in vfio_device_group_unuse_iommu()
813 vfio_group_unuse_container(group); in vfio_device_group_unuse_iommu()
818 return device->group->container; in vfio_device_has_container()
823 struct vfio_group *group = file->private_data; in vfio_group_from_file() local
827 return group; in vfio_group_from_file()
831 * vfio_file_iommu_group - Return the struct iommu_group for the vfio group file
832 * @file: VFIO group file
835 * returns a reference on the group. This function is deprecated, only the SPAPR
840 struct vfio_group *group = vfio_group_from_file(file); in vfio_file_iommu_group() local
846 if (!group) in vfio_file_iommu_group()
849 mutex_lock(&group->group_lock); in vfio_file_iommu_group()
850 if (group->iommu_group) { in vfio_file_iommu_group()
851 iommu_group = group->iommu_group; in vfio_file_iommu_group()
854 mutex_unlock(&group->group_lock); in vfio_file_iommu_group()
860 * vfio_file_is_group - True if the file is a vfio group file
861 * @file: VFIO group file
869 bool vfio_group_enforced_coherent(struct vfio_group *group) in vfio_group_enforced_coherent() argument
877 * is set then the iommu_domain eventually attached to the device/group in vfio_group_enforced_coherent()
880 mutex_lock(&group->device_lock); in vfio_group_enforced_coherent()
881 list_for_each_entry(device, &group->device_list, group_next) { in vfio_group_enforced_coherent()
888 mutex_unlock(&group->device_lock); in vfio_group_enforced_coherent()
892 void vfio_group_set_kvm(struct vfio_group *group, struct kvm *kvm) in vfio_group_set_kvm() argument
894 spin_lock(&group->kvm_ref_lock); in vfio_group_set_kvm()
895 group->kvm = kvm; in vfio_group_set_kvm()
896 spin_unlock(&group->kvm_ref_lock); in vfio_group_set_kvm()
908 struct vfio_group *group = vfio_group_from_file(file); in vfio_file_has_dev() local
910 if (!group) in vfio_file_has_dev()
913 return group == device->group; in vfio_file_has_dev()
934 /* /dev/vfio/$GROUP */ in vfio_group_init()