Lines Matching full:group
75 #define for_each_group_device(group, pos) \ argument
76 list_for_each_entry(pos, &(group)->devices, list)
80 ssize_t (*show)(struct iommu_group *group, char *buf);
81 ssize_t (*store)(struct iommu_group *group,
104 struct iommu_group *group);
110 static int __iommu_device_set_domain(struct iommu_group *group,
114 static int __iommu_group_set_domain_internal(struct iommu_group *group,
117 static int __iommu_group_set_domain(struct iommu_group *group, in __iommu_group_set_domain() argument
120 return __iommu_group_set_domain_internal(group, new_domain, 0); in __iommu_group_set_domain()
122 static void __iommu_group_set_domain_nofail(struct iommu_group *group, in __iommu_group_set_domain_nofail() argument
126 group, new_domain, IOMMU_SET_DOMAIN_MUST_SUCCEED)); in __iommu_group_set_domain_nofail()
129 static int iommu_setup_default_domain(struct iommu_group *group,
133 static ssize_t iommu_group_store_type(struct iommu_group *group,
135 static struct group_device *iommu_group_alloc_device(struct iommu_group *group,
137 static void __iommu_group_free_device(struct iommu_group *group,
391 struct iommu_group *group; in iommu_init_device() local
412 group = ops->device_group(dev); in iommu_init_device()
413 if (WARN_ON_ONCE(group == NULL)) in iommu_init_device()
414 group = ERR_PTR(-EINVAL); in iommu_init_device()
415 if (IS_ERR(group)) { in iommu_init_device()
416 ret = PTR_ERR(group); in iommu_init_device()
419 dev->iommu_group = group; in iommu_init_device()
441 struct iommu_group *group = dev->iommu_group; in iommu_deinit_device() local
444 lockdep_assert_held(&group->mutex); in iommu_deinit_device()
450 * If there are still other devices in the group they are not effected in iommu_deinit_device()
461 * If this is the last driver to use the group then we must free the in iommu_deinit_device()
464 if (list_empty(&group->devices)) { in iommu_deinit_device()
465 if (group->default_domain) { in iommu_deinit_device()
466 iommu_domain_free(group->default_domain); in iommu_deinit_device()
467 group->default_domain = NULL; in iommu_deinit_device()
469 if (group->blocking_domain) { in iommu_deinit_device()
470 iommu_domain_free(group->blocking_domain); in iommu_deinit_device()
471 group->blocking_domain = NULL; in iommu_deinit_device()
473 group->domain = NULL; in iommu_deinit_device()
485 struct iommu_group *group; in __iommu_probe_device() local
501 /* Device is probed already if in a group */ in __iommu_probe_device()
511 group = dev->iommu_group; in __iommu_probe_device()
512 gdev = iommu_group_alloc_device(group, dev); in __iommu_probe_device()
513 mutex_lock(&group->mutex); in __iommu_probe_device()
523 list_add_tail(&gdev->list, &group->devices); in __iommu_probe_device()
524 WARN_ON(group->default_domain && !group->domain); in __iommu_probe_device()
525 if (group->default_domain) in __iommu_probe_device()
526 iommu_create_device_direct_mappings(group->default_domain, dev); in __iommu_probe_device()
527 if (group->domain) { in __iommu_probe_device()
528 ret = __iommu_device_set_domain(group, dev, group->domain, 0); in __iommu_probe_device()
531 } else if (!group->default_domain && !group_list) { in __iommu_probe_device()
532 ret = iommu_setup_default_domain(group, 0); in __iommu_probe_device()
535 } else if (!group->default_domain) { in __iommu_probe_device()
541 if (list_empty(&group->entry)) in __iommu_probe_device()
542 list_add_tail(&group->entry, group_list); in __iommu_probe_device()
544 mutex_unlock(&group->mutex); in __iommu_probe_device()
554 __iommu_group_free_device(group, gdev); in __iommu_probe_device()
557 mutex_unlock(&group->mutex); in __iommu_probe_device()
558 iommu_group_put(group); in __iommu_probe_device()
581 static void __iommu_group_free_device(struct iommu_group *group, in __iommu_group_free_device() argument
586 sysfs_remove_link(group->devices_kobj, grp_dev->name); in __iommu_group_free_device()
589 trace_remove_device_from_group(group->id, dev); in __iommu_group_free_device()
592 * If the group has become empty then ownership must have been in __iommu_group_free_device()
596 if (list_empty(&group->devices)) in __iommu_group_free_device()
597 WARN_ON(group->owner_cnt || in __iommu_group_free_device()
598 group->domain != group->default_domain); in __iommu_group_free_device()
607 struct iommu_group *group = dev->iommu_group; in __iommu_group_remove_device() local
610 mutex_lock(&group->mutex); in __iommu_group_remove_device()
611 for_each_group_device(group, device) { in __iommu_group_remove_device()
616 __iommu_group_free_device(group, device); in __iommu_group_remove_device()
623 mutex_unlock(&group->mutex); in __iommu_group_remove_device()
629 iommu_group_put(group); in __iommu_group_remove_device()
634 struct iommu_group *group = dev->iommu_group; in iommu_release_device() local
636 if (group) in iommu_release_device()
683 struct iommu_group *group = to_iommu_group(kobj); in iommu_group_attr_show() local
687 ret = attr->show(group, buf); in iommu_group_attr_show()
696 struct iommu_group *group = to_iommu_group(kobj); in iommu_group_attr_store() local
700 ret = attr->store(group, buf, count); in iommu_group_attr_store()
709 static int iommu_group_create_file(struct iommu_group *group, in iommu_group_create_file() argument
712 return sysfs_create_file(&group->kobj, &attr->attr); in iommu_group_create_file()
715 static void iommu_group_remove_file(struct iommu_group *group, in iommu_group_remove_file() argument
718 sysfs_remove_file(&group->kobj, &attr->attr); in iommu_group_remove_file()
721 static ssize_t iommu_group_show_name(struct iommu_group *group, char *buf) in iommu_group_show_name() argument
723 return sysfs_emit(buf, "%s\n", group->name); in iommu_group_show_name()
802 int iommu_get_group_resv_regions(struct iommu_group *group, in iommu_get_group_resv_regions() argument
808 mutex_lock(&group->mutex); in iommu_get_group_resv_regions()
809 for_each_group_device(group, device) { in iommu_get_group_resv_regions()
826 mutex_unlock(&group->mutex); in iommu_get_group_resv_regions()
831 static ssize_t iommu_group_show_resv_regions(struct iommu_group *group, in iommu_group_show_resv_regions() argument
839 iommu_get_group_resv_regions(group, &group_resv_regions); in iommu_group_show_resv_regions()
853 static ssize_t iommu_group_show_type(struct iommu_group *group, in iommu_group_show_type() argument
858 mutex_lock(&group->mutex); in iommu_group_show_type()
859 if (group->default_domain) { in iommu_group_show_type()
860 switch (group->default_domain->type) { in iommu_group_show_type()
878 mutex_unlock(&group->mutex); in iommu_group_show_type()
893 struct iommu_group *group = to_iommu_group(kobj); in iommu_group_release() local
895 pr_debug("Releasing group %d\n", group->id); in iommu_group_release()
897 if (group->iommu_data_release) in iommu_group_release()
898 group->iommu_data_release(group->iommu_data); in iommu_group_release()
900 ida_free(&iommu_group_ida, group->id); in iommu_group_release()
903 WARN_ON(group->default_domain); in iommu_group_release()
904 WARN_ON(group->blocking_domain); in iommu_group_release()
906 kfree(group->name); in iommu_group_release()
907 kfree(group); in iommu_group_release()
916 * iommu_group_alloc - Allocate a new group
919 * group. The iommu group represents the minimum granularity of the iommu.
921 * group in order to hold the group until devices are added. Use
923 * group to be automatically reclaimed once it has no devices or external
928 struct iommu_group *group; in iommu_group_alloc() local
931 group = kzalloc(sizeof(*group), GFP_KERNEL); in iommu_group_alloc()
932 if (!group) in iommu_group_alloc()
935 group->kobj.kset = iommu_group_kset; in iommu_group_alloc()
936 mutex_init(&group->mutex); in iommu_group_alloc()
937 INIT_LIST_HEAD(&group->devices); in iommu_group_alloc()
938 INIT_LIST_HEAD(&group->entry); in iommu_group_alloc()
939 xa_init(&group->pasid_array); in iommu_group_alloc()
943 kfree(group); in iommu_group_alloc()
946 group->id = ret; in iommu_group_alloc()
948 ret = kobject_init_and_add(&group->kobj, &iommu_group_ktype, in iommu_group_alloc()
949 NULL, "%d", group->id); in iommu_group_alloc()
951 kobject_put(&group->kobj); in iommu_group_alloc()
955 group->devices_kobj = kobject_create_and_add("devices", &group->kobj); in iommu_group_alloc()
956 if (!group->devices_kobj) { in iommu_group_alloc()
957 kobject_put(&group->kobj); /* triggers .release & free */ in iommu_group_alloc()
962 * The devices_kobj holds a reference on the group kobject, so in iommu_group_alloc()
963 * as long as that exists so will the group. We can therefore in iommu_group_alloc()
966 kobject_put(&group->kobj); in iommu_group_alloc()
968 ret = iommu_group_create_file(group, in iommu_group_alloc()
971 kobject_put(group->devices_kobj); in iommu_group_alloc()
975 ret = iommu_group_create_file(group, &iommu_group_attr_type); in iommu_group_alloc()
977 kobject_put(group->devices_kobj); in iommu_group_alloc()
981 pr_debug("Allocated group %d\n", group->id); in iommu_group_alloc()
983 return group; in iommu_group_alloc()
988 * iommu_group_get_iommudata - retrieve iommu_data registered for a group
989 * @group: the group
991 * iommu drivers can store data in the group for use when doing iommu
993 * should hold a group reference.
995 void *iommu_group_get_iommudata(struct iommu_group *group) in iommu_group_get_iommudata() argument
997 return group->iommu_data; in iommu_group_get_iommudata()
1002 * iommu_group_set_iommudata - set iommu_data for a group
1003 * @group: the group
1007 * iommu drivers can store data in the group for use when doing iommu
1009 * the group has been allocated. Caller should hold a group reference.
1011 void iommu_group_set_iommudata(struct iommu_group *group, void *iommu_data, in iommu_group_set_iommudata() argument
1014 group->iommu_data = iommu_data; in iommu_group_set_iommudata()
1015 group->iommu_data_release = release; in iommu_group_set_iommudata()
1020 * iommu_group_set_name - set name for a group
1021 * @group: the group
1024 * Allow iommu driver to set a name for a group. When set it will
1025 * appear in a name attribute file under the group in sysfs.
1027 int iommu_group_set_name(struct iommu_group *group, const char *name) in iommu_group_set_name() argument
1031 if (group->name) { in iommu_group_set_name()
1032 iommu_group_remove_file(group, &iommu_group_attr_name); in iommu_group_set_name()
1033 kfree(group->name); in iommu_group_set_name()
1034 group->name = NULL; in iommu_group_set_name()
1039 group->name = kstrdup(name, GFP_KERNEL); in iommu_group_set_name()
1040 if (!group->name) in iommu_group_set_name()
1043 ret = iommu_group_create_file(group, &iommu_group_attr_name); in iommu_group_set_name()
1045 kfree(group->name); in iommu_group_set_name()
1046 group->name = NULL; in iommu_group_set_name()
1121 static struct group_device *iommu_group_alloc_device(struct iommu_group *group, in iommu_group_alloc_device() argument
1133 ret = sysfs_create_link(&dev->kobj, &group->kobj, "iommu_group"); in iommu_group_alloc_device()
1144 ret = sysfs_create_link_nowarn(group->devices_kobj, in iommu_group_alloc_device()
1160 trace_add_device_to_group(group->id, dev); in iommu_group_alloc_device()
1162 dev_info(dev, "Adding to iommu group %d\n", group->id); in iommu_group_alloc_device()
1172 dev_err(dev, "Failed to add to iommu group %d: %d\n", group->id, ret); in iommu_group_alloc_device()
1177 * iommu_group_add_device - add a device to an iommu group
1178 * @group: the group into which to add the device (reference should be held)
1182 * group. Adding a device increments the group reference count.
1184 int iommu_group_add_device(struct iommu_group *group, struct device *dev) in iommu_group_add_device() argument
1188 gdev = iommu_group_alloc_device(group, dev); in iommu_group_add_device()
1192 iommu_group_ref_get(group); in iommu_group_add_device()
1193 dev->iommu_group = group; in iommu_group_add_device()
1195 mutex_lock(&group->mutex); in iommu_group_add_device()
1196 list_add_tail(&gdev->list, &group->devices); in iommu_group_add_device()
1197 mutex_unlock(&group->mutex); in iommu_group_add_device()
1203 * iommu_group_remove_device - remove a device from it's current group
1207 * it's current group. This decrements the iommu group reference count.
1211 struct iommu_group *group = dev->iommu_group; in iommu_group_remove_device() local
1213 if (!group) in iommu_group_remove_device()
1216 dev_info(dev, "Removing from iommu group %d\n", group->id); in iommu_group_remove_device()
1223 * iommu_group_for_each_dev - iterate over each device in the group
1224 * @group: the group
1228 * This function is called by group users to iterate over group devices.
1229 * Callers should hold a reference count to the group during callback.
1230 * The group->mutex is held across callbacks, which will block calls to
1233 int iommu_group_for_each_dev(struct iommu_group *group, void *data, in iommu_group_for_each_dev() argument
1239 mutex_lock(&group->mutex); in iommu_group_for_each_dev()
1240 for_each_group_device(group, device) { in iommu_group_for_each_dev()
1245 mutex_unlock(&group->mutex); in iommu_group_for_each_dev()
1252 * iommu_group_get - Return the group for a device and increment reference
1253 * @dev: get the group that this device belongs to
1255 * This function is called by iommu drivers and users to get the group
1256 * for the specified device. If found, the group is returned and the group
1261 struct iommu_group *group = dev->iommu_group; in iommu_group_get() local
1263 if (group) in iommu_group_get()
1264 kobject_get(group->devices_kobj); in iommu_group_get()
1266 return group; in iommu_group_get()
1271 * iommu_group_ref_get - Increment reference on a group
1272 * @group: the group to use, must not be NULL
1275 * existing group. Returns the given group for convenience.
1277 struct iommu_group *iommu_group_ref_get(struct iommu_group *group) in iommu_group_ref_get() argument
1279 kobject_get(group->devices_kobj); in iommu_group_ref_get()
1280 return group; in iommu_group_ref_get()
1285 * iommu_group_put - Decrement group reference
1286 * @group: the group to use
1289 * iommu group. Once the reference count is zero, the group is released.
1291 void iommu_group_put(struct iommu_group *group) in iommu_group_put() argument
1293 if (group) in iommu_group_put()
1294 kobject_put(group->devices_kobj); in iommu_group_put()
1483 * matched using the group ID, the PASID valid bit and the PASID in iommu_page_response()
1484 * value. Otherwise only the group ID matches request and in iommu_page_response()
1510 * iommu_group_id - Return ID for a group
1511 * @group: the group to ID
1513 * Return the unique ID for the group matching the sysfs group number.
1515 int iommu_group_id(struct iommu_group *group) in iommu_group_id() argument
1517 return group->id; in iommu_group_id()
1538 * that may already have a group.
1544 struct iommu_group *group; in get_pci_function_alias_group() local
1555 group = get_pci_alias_group(tmp, devfns); in get_pci_function_alias_group()
1556 if (group) { in get_pci_function_alias_group()
1558 return group; in get_pci_function_alias_group()
1578 struct iommu_group *group; in get_pci_alias_group() local
1583 group = iommu_group_get(&pdev->dev); in get_pci_alias_group()
1584 if (group) in get_pci_alias_group()
1585 return group; in get_pci_alias_group()
1593 group = get_pci_alias_group(tmp, devfns); in get_pci_alias_group()
1594 if (group) { in get_pci_alias_group()
1596 return group; in get_pci_alias_group()
1599 group = get_pci_function_alias_group(tmp, devfns); in get_pci_alias_group()
1600 if (group) { in get_pci_alias_group()
1602 return group; in get_pci_alias_group()
1612 struct iommu_group *group; member
1617 * the IOMMU group if we find one along the way.
1624 data->group = iommu_group_get(&pdev->dev); in get_pci_alias_or_group()
1626 return data->group != NULL; in get_pci_alias_or_group()
1631 * iommu-group per device.
1641 * to find or create an IOMMU group for a device.
1648 struct iommu_group *group = NULL; in pci_device_group() local
1656 * be aliased due to topology in order to have its own IOMMU group. in pci_device_group()
1658 * group, use it. in pci_device_group()
1661 return data.group; in pci_device_group()
1669 * group, use it. in pci_device_group()
1680 group = iommu_group_get(&pdev->dev); in pci_device_group()
1681 if (group) in pci_device_group()
1682 return group; in pci_device_group()
1687 * device or another device aliases us, use the same group. in pci_device_group()
1689 group = get_pci_alias_group(pdev, (unsigned long *)devfns); in pci_device_group()
1690 if (group) in pci_device_group()
1691 return group; in pci_device_group()
1698 group = get_pci_function_alias_group(pdev, (unsigned long *)devfns); in pci_device_group()
1699 if (group) in pci_device_group()
1700 return group; in pci_device_group()
1702 /* No shared group found, allocate new */ in pci_device_group()
1707 /* Get the IOMMU group for device on fsl-mc bus */
1711 struct iommu_group *group; in fsl_mc_device_group() local
1713 group = iommu_group_get(cont_dev); in fsl_mc_device_group()
1714 if (!group) in fsl_mc_device_group()
1715 group = iommu_group_alloc(); in fsl_mc_device_group()
1716 return group; in fsl_mc_device_group()
1735 struct iommu_group *group, int req_type) in __iommu_group_alloc_default_domain() argument
1737 if (group->default_domain && group->default_domain->type == req_type) in __iommu_group_alloc_default_domain()
1738 return group->default_domain; in __iommu_group_alloc_default_domain()
1747 iommu_group_alloc_default_domain(struct iommu_group *group, int req_type) in iommu_group_alloc_default_domain() argument
1750 list_first_entry(&group->devices, struct group_device, list) in iommu_group_alloc_default_domain()
1754 lockdep_assert_held(&group->mutex); in iommu_group_alloc_default_domain()
1757 return __iommu_group_alloc_default_domain(bus, group, req_type); in iommu_group_alloc_default_domain()
1760 dom = __iommu_group_alloc_default_domain(bus, group, iommu_def_domain_type); in iommu_group_alloc_default_domain()
1767 dom = __iommu_group_alloc_default_domain(bus, group, IOMMU_DOMAIN_DMA); in iommu_group_alloc_default_domain()
1771 …pr_warn("Failed to allocate default IOMMU domain of type %u for group %s - Falling back to IOMMU_D… in iommu_group_alloc_default_domain()
1772 iommu_def_domain_type, group->name); in iommu_group_alloc_default_domain()
1776 struct iommu_domain *iommu_group_default_domain(struct iommu_group *group) in iommu_group_default_domain() argument
1778 return group->default_domain; in iommu_group_default_domain()
1812 static int iommu_get_default_domain_type(struct iommu_group *group, in iommu_get_default_domain_type() argument
1819 lockdep_assert_held(&group->mutex); in iommu_get_default_domain_type()
1821 for_each_group_device(group, gdev) { in iommu_get_default_domain_type()
1835 …"Device needs domain type %s, but device %s in the same iommu group requires type %s - using defau… in iommu_get_default_domain_type()
1857 struct iommu_group *group, *next; in bus_iommu_probe() local
1865 list_for_each_entry_safe(group, next, &group_list, entry) { in bus_iommu_probe()
1868 mutex_lock(&group->mutex); in bus_iommu_probe()
1871 list_del_init(&group->entry); in bus_iommu_probe()
1875 * that the cross-group default domain type and the setup of the in bus_iommu_probe()
1878 ret = iommu_setup_default_domain(group, 0); in bus_iommu_probe()
1880 mutex_unlock(&group->mutex); in bus_iommu_probe()
1883 mutex_unlock(&group->mutex); in bus_iommu_probe()
1889 * to take group->mutex, resulting in a deadlock. in bus_iommu_probe()
1891 for_each_group_device(group, gdev) in bus_iommu_probe()
1929 * for a group
1930 * @group: Group to query
1933 * msi_device_has_isolated_msi() for devices in a group. However nothing
1937 bool iommu_group_has_isolated_msi(struct iommu_group *group) in iommu_group_has_isolated_msi() argument
1942 mutex_lock(&group->mutex); in iommu_group_has_isolated_msi()
1943 for_each_group_device(group, group_dev) in iommu_group_has_isolated_msi()
1945 mutex_unlock(&group->mutex); in iommu_group_has_isolated_msi()
2020 * Put the group's domain back to the appropriate core-owned domain - either the
2023 static void __iommu_group_set_core_domain(struct iommu_group *group) in __iommu_group_set_core_domain() argument
2027 if (group->owner) in __iommu_group_set_core_domain()
2028 new_domain = group->blocking_domain; in __iommu_group_set_core_domain()
2030 new_domain = group->default_domain; in __iommu_group_set_core_domain()
2032 __iommu_group_set_domain_nofail(group, new_domain); in __iommu_group_set_core_domain()
2065 struct iommu_group *group; in iommu_attach_device() local
2068 group = iommu_group_get(dev); in iommu_attach_device()
2069 if (!group) in iommu_attach_device()
2073 * Lock the group to make sure the device-count doesn't in iommu_attach_device()
2076 mutex_lock(&group->mutex); in iommu_attach_device()
2078 if (list_count_nodes(&group->devices) != 1) in iommu_attach_device()
2081 ret = __iommu_attach_group(domain, group); in iommu_attach_device()
2084 mutex_unlock(&group->mutex); in iommu_attach_device()
2085 iommu_group_put(group); in iommu_attach_device()
2101 struct iommu_group *group; in iommu_detach_device() local
2103 group = iommu_group_get(dev); in iommu_detach_device()
2104 if (!group) in iommu_detach_device()
2107 mutex_lock(&group->mutex); in iommu_detach_device()
2108 if (WARN_ON(domain != group->domain) || in iommu_detach_device()
2109 WARN_ON(list_count_nodes(&group->devices) != 1)) in iommu_detach_device()
2111 __iommu_group_set_core_domain(group); in iommu_detach_device()
2114 mutex_unlock(&group->mutex); in iommu_detach_device()
2115 iommu_group_put(group); in iommu_detach_device()
2122 struct iommu_group *group; in iommu_get_domain_for_dev() local
2124 group = iommu_group_get(dev); in iommu_get_domain_for_dev()
2125 if (!group) in iommu_get_domain_for_dev()
2128 domain = group->domain; in iommu_get_domain_for_dev()
2130 iommu_group_put(group); in iommu_get_domain_for_dev()
2138 * guarantees that the group and its default domain are valid and correct.
2146 struct iommu_group *group) in __iommu_attach_group() argument
2148 if (group->domain && group->domain != group->default_domain && in __iommu_attach_group()
2149 group->domain != group->blocking_domain) in __iommu_attach_group()
2152 return __iommu_group_set_domain(group, domain); in __iommu_attach_group()
2156 * iommu_attach_group - Attach an IOMMU domain to an IOMMU group
2158 * @group: IOMMU group that will be attached
2164 * the group. In this case attaching a different domain to the
2165 * group may succeed.
2167 int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group) in iommu_attach_group() argument
2171 mutex_lock(&group->mutex); in iommu_attach_group()
2172 ret = __iommu_attach_group(domain, group); in iommu_attach_group()
2173 mutex_unlock(&group->mutex); in iommu_attach_group()
2180 * iommu_group_replace_domain - replace the domain that a group is attached to
2182 * @group: IOMMU group that will be attached to the new domain
2184 * This API allows the group to switch domains without being forced to go to
2190 int iommu_group_replace_domain(struct iommu_group *group, in iommu_group_replace_domain() argument
2198 mutex_lock(&group->mutex); in iommu_group_replace_domain()
2199 ret = __iommu_group_set_domain(group, new_domain); in iommu_group_replace_domain()
2200 mutex_unlock(&group->mutex); in iommu_group_replace_domain()
2205 static int __iommu_device_set_domain(struct iommu_group *group, in __iommu_device_set_domain() argument
2221 new_domain == group->blocking_domain)) { in __iommu_device_set_domain()
2228 if (new_domain == group->default_domain) in __iommu_device_set_domain()
2241 group->blocking_domain && in __iommu_device_set_domain()
2242 group->blocking_domain != new_domain) in __iommu_device_set_domain()
2243 __iommu_attach_device(group->blocking_domain, dev); in __iommu_device_set_domain()
2250 * If 0 is returned the group's domain is new_domain. If an error is returned
2251 * then the group's domain will be set back to the existing domain unless
2252 * IOMMU_SET_DOMAIN_MUST_SUCCEED, otherwise an error is returned and the group's
2258 * devices in a group. Ideally we'd have a single device which represents the
2259 * requestor ID of the group, but we also allow IOMMU drivers to create policy
2261 * members, but we wish to group them at a higher level (ex. untrusted
2264 static int __iommu_group_set_domain_internal(struct iommu_group *group, in __iommu_group_set_domain_internal() argument
2273 lockdep_assert_held(&group->mutex); in __iommu_group_set_domain_internal()
2275 if (group->domain == new_domain) in __iommu_group_set_domain_internal()
2284 for_each_group_device(group, gdev) { in __iommu_group_set_domain_internal()
2290 group->domain = NULL; in __iommu_group_set_domain_internal()
2298 * either new_domain or group->domain, never something else. in __iommu_group_set_domain_internal()
2301 for_each_group_device(group, gdev) { in __iommu_group_set_domain_internal()
2302 ret = __iommu_device_set_domain(group, gdev->dev, new_domain, in __iommu_group_set_domain_internal()
2307 * Keep trying the other devices in the group. If a in __iommu_group_set_domain_internal()
2318 group->domain = new_domain; in __iommu_group_set_domain_internal()
2327 for_each_group_device(group, gdev) { in __iommu_group_set_domain_internal()
2333 * group->domain as NULL and let release clean everything up. in __iommu_group_set_domain_internal()
2335 if (group->domain) in __iommu_group_set_domain_internal()
2337 group, gdev->dev, group->domain, in __iommu_group_set_domain_internal()
2347 void iommu_detach_group(struct iommu_domain *domain, struct iommu_group *group) in iommu_detach_group() argument
2349 mutex_lock(&group->mutex); in iommu_detach_group()
2350 __iommu_group_set_core_domain(group); in iommu_detach_group()
2351 mutex_unlock(&group->mutex); in iommu_detach_group()
2935 * iommu_setup_default_domain - Set the default_domain for the group
2936 * @group: Group to change
2939 * Allocate a default domain and set it as the current domain on the group. If
2940 * the group already has a default domain it will be changed to the target_type.
2944 static int iommu_setup_default_domain(struct iommu_group *group, in iommu_setup_default_domain() argument
2947 struct iommu_domain *old_dom = group->default_domain; in iommu_setup_default_domain()
2954 lockdep_assert_held(&group->mutex); in iommu_setup_default_domain()
2956 req_type = iommu_get_default_domain_type(group, target_type); in iommu_setup_default_domain()
2962 * we ignore the failure and leave group->default_domain NULL. in iommu_setup_default_domain()
2967 dom = iommu_group_alloc_default_domain(group, req_type); in iommu_setup_default_domain()
2970 if (group->default_domain) in iommu_setup_default_domain()
2972 group->default_domain = NULL; in iommu_setup_default_domain()
2976 if (group->default_domain == dom) in iommu_setup_default_domain()
2985 for_each_group_device(group, gdev) { in iommu_setup_default_domain()
2995 group->default_domain = dom; in iommu_setup_default_domain()
2996 if (!group->domain) { in iommu_setup_default_domain()
3001 * in group->default_domain so it is freed after. in iommu_setup_default_domain()
3004 group, dom, IOMMU_SET_DOMAIN_MUST_SUCCEED); in iommu_setup_default_domain()
3008 ret = __iommu_group_set_domain(group, dom); in iommu_setup_default_domain()
3020 for_each_group_device(group, gdev) { in iommu_setup_default_domain()
3035 group, old_dom, IOMMU_SET_DOMAIN_MUST_SUCCEED); in iommu_setup_default_domain()
3039 group->default_domain = old_dom; in iommu_setup_default_domain()
3046 * drivers from the devices in the iommu group, except for a DMA -> DMA-FQ
3050 * group->mutex is used here to guarantee that the device release path
3053 static ssize_t iommu_group_store_type(struct iommu_group *group, in iommu_group_store_type() argument
3062 if (WARN_ON(!group) || !group->default_domain) in iommu_group_store_type()
3076 mutex_lock(&group->mutex); in iommu_group_store_type()
3079 group->default_domain->type == IOMMU_DOMAIN_DMA) { in iommu_group_store_type()
3080 ret = iommu_dma_init_fq(group->default_domain); in iommu_group_store_type()
3084 group->default_domain->type = IOMMU_DOMAIN_DMA_FQ; in iommu_group_store_type()
3090 if (list_empty(&group->devices) || group->owner_cnt) { in iommu_group_store_type()
3095 ret = iommu_setup_default_domain(group, req_type); in iommu_group_store_type()
3103 * group->mutex, resulting in a deadlock. in iommu_group_store_type()
3105 mutex_unlock(&group->mutex); in iommu_group_store_type()
3108 for_each_group_device(group, gdev) in iommu_group_store_type()
3113 mutex_unlock(&group->mutex); in iommu_group_store_type()
3117 static bool iommu_is_default_domain(struct iommu_group *group) in iommu_is_default_domain() argument
3119 if (group->domain == group->default_domain) in iommu_is_default_domain()
3128 if (group->default_domain && in iommu_is_default_domain()
3129 group->default_domain->type == IOMMU_DOMAIN_IDENTITY && in iommu_is_default_domain()
3130 group->domain && group->domain->type == IOMMU_DOMAIN_IDENTITY) in iommu_is_default_domain()
3145 struct iommu_group *group = iommu_group_get(dev); in iommu_device_use_default_domain() local
3148 if (!group) in iommu_device_use_default_domain()
3151 mutex_lock(&group->mutex); in iommu_device_use_default_domain()
3152 if (group->owner_cnt) { in iommu_device_use_default_domain()
3153 if (group->owner || !iommu_is_default_domain(group) || in iommu_device_use_default_domain()
3154 !xa_empty(&group->pasid_array)) { in iommu_device_use_default_domain()
3160 group->owner_cnt++; in iommu_device_use_default_domain()
3163 mutex_unlock(&group->mutex); in iommu_device_use_default_domain()
3164 iommu_group_put(group); in iommu_device_use_default_domain()
3179 struct iommu_group *group = iommu_group_get(dev); in iommu_device_unuse_default_domain() local
3181 if (!group) in iommu_device_unuse_default_domain()
3184 mutex_lock(&group->mutex); in iommu_device_unuse_default_domain()
3185 if (!WARN_ON(!group->owner_cnt || !xa_empty(&group->pasid_array))) in iommu_device_unuse_default_domain()
3186 group->owner_cnt--; in iommu_device_unuse_default_domain()
3188 mutex_unlock(&group->mutex); in iommu_device_unuse_default_domain()
3189 iommu_group_put(group); in iommu_device_unuse_default_domain()
3192 static int __iommu_group_alloc_blocking_domain(struct iommu_group *group) in __iommu_group_alloc_blocking_domain() argument
3195 list_first_entry(&group->devices, struct group_device, list); in __iommu_group_alloc_blocking_domain()
3197 if (group->blocking_domain) in __iommu_group_alloc_blocking_domain()
3200 group->blocking_domain = in __iommu_group_alloc_blocking_domain()
3202 if (!group->blocking_domain) { in __iommu_group_alloc_blocking_domain()
3207 group->blocking_domain = __iommu_domain_alloc( in __iommu_group_alloc_blocking_domain()
3209 if (!group->blocking_domain) in __iommu_group_alloc_blocking_domain()
3215 static int __iommu_take_dma_ownership(struct iommu_group *group, void *owner) in __iommu_take_dma_ownership() argument
3219 if ((group->domain && group->domain != group->default_domain) || in __iommu_take_dma_ownership()
3220 !xa_empty(&group->pasid_array)) in __iommu_take_dma_ownership()
3223 ret = __iommu_group_alloc_blocking_domain(group); in __iommu_take_dma_ownership()
3226 ret = __iommu_group_set_domain(group, group->blocking_domain); in __iommu_take_dma_ownership()
3230 group->owner = owner; in __iommu_take_dma_ownership()
3231 group->owner_cnt++; in __iommu_take_dma_ownership()
3236 * iommu_group_claim_dma_owner() - Set DMA ownership of a group
3237 * @group: The group.
3242 * prohibited. Only a single owner may exist for a group.
3244 int iommu_group_claim_dma_owner(struct iommu_group *group, void *owner) in iommu_group_claim_dma_owner() argument
3251 mutex_lock(&group->mutex); in iommu_group_claim_dma_owner()
3252 if (group->owner_cnt) { in iommu_group_claim_dma_owner()
3257 ret = __iommu_take_dma_ownership(group, owner); in iommu_group_claim_dma_owner()
3259 mutex_unlock(&group->mutex); in iommu_group_claim_dma_owner()
3270 * Claim the DMA ownership of a device. Multiple devices in the same group may
3276 struct iommu_group *group; in iommu_device_claim_dma_owner() local
3282 group = iommu_group_get(dev); in iommu_device_claim_dma_owner()
3283 if (!group) in iommu_device_claim_dma_owner()
3286 mutex_lock(&group->mutex); in iommu_device_claim_dma_owner()
3287 if (group->owner_cnt) { in iommu_device_claim_dma_owner()
3288 if (group->owner != owner) { in iommu_device_claim_dma_owner()
3292 group->owner_cnt++; in iommu_device_claim_dma_owner()
3296 ret = __iommu_take_dma_ownership(group, owner); in iommu_device_claim_dma_owner()
3298 mutex_unlock(&group->mutex); in iommu_device_claim_dma_owner()
3299 iommu_group_put(group); in iommu_device_claim_dma_owner()
3305 static void __iommu_release_dma_ownership(struct iommu_group *group) in __iommu_release_dma_ownership() argument
3307 if (WARN_ON(!group->owner_cnt || !group->owner || in __iommu_release_dma_ownership()
3308 !xa_empty(&group->pasid_array))) in __iommu_release_dma_ownership()
3311 group->owner_cnt = 0; in __iommu_release_dma_ownership()
3312 group->owner = NULL; in __iommu_release_dma_ownership()
3313 __iommu_group_set_domain_nofail(group, group->default_domain); in __iommu_release_dma_ownership()
3317 * iommu_group_release_dma_owner() - Release DMA ownership of a group
3318 * @group: The group
3322 void iommu_group_release_dma_owner(struct iommu_group *group) in iommu_group_release_dma_owner() argument
3324 mutex_lock(&group->mutex); in iommu_group_release_dma_owner()
3325 __iommu_release_dma_ownership(group); in iommu_group_release_dma_owner()
3326 mutex_unlock(&group->mutex); in iommu_group_release_dma_owner()
3338 struct iommu_group *group = iommu_group_get(dev); in iommu_device_release_dma_owner() local
3340 mutex_lock(&group->mutex); in iommu_device_release_dma_owner()
3341 if (group->owner_cnt > 1) in iommu_device_release_dma_owner()
3342 group->owner_cnt--; in iommu_device_release_dma_owner()
3344 __iommu_release_dma_ownership(group); in iommu_device_release_dma_owner()
3345 mutex_unlock(&group->mutex); in iommu_device_release_dma_owner()
3346 iommu_group_put(group); in iommu_device_release_dma_owner()
3351 * iommu_group_dma_owner_claimed() - Query group dma ownership status
3352 * @group: The group.
3354 * This provides status query on a given group. It is racy and only for
3357 bool iommu_group_dma_owner_claimed(struct iommu_group *group) in iommu_group_dma_owner_claimed() argument
3361 mutex_lock(&group->mutex); in iommu_group_dma_owner_claimed()
3362 user = group->owner_cnt; in iommu_group_dma_owner_claimed()
3363 mutex_unlock(&group->mutex); in iommu_group_dma_owner_claimed()
3370 struct iommu_group *group, ioasid_t pasid) in __iommu_set_group_pasid() argument
3375 for_each_group_device(group, device) { in __iommu_set_group_pasid()
3384 static void __iommu_remove_group_pasid(struct iommu_group *group, in __iommu_remove_group_pasid() argument
3390 for_each_group_device(group, device) { in __iommu_remove_group_pasid()
3407 struct iommu_group *group; in iommu_attach_device_pasid() local
3414 group = iommu_group_get(dev); in iommu_attach_device_pasid()
3415 if (!group) in iommu_attach_device_pasid()
3418 mutex_lock(&group->mutex); in iommu_attach_device_pasid()
3419 curr = xa_cmpxchg(&group->pasid_array, pasid, NULL, domain, GFP_KERNEL); in iommu_attach_device_pasid()
3425 ret = __iommu_set_group_pasid(domain, group, pasid); in iommu_attach_device_pasid()
3427 __iommu_remove_group_pasid(group, pasid); in iommu_attach_device_pasid()
3428 xa_erase(&group->pasid_array, pasid); in iommu_attach_device_pasid()
3431 mutex_unlock(&group->mutex); in iommu_attach_device_pasid()
3432 iommu_group_put(group); in iommu_attach_device_pasid()
3450 struct iommu_group *group = iommu_group_get(dev); in iommu_detach_device_pasid() local
3452 mutex_lock(&group->mutex); in iommu_detach_device_pasid()
3453 __iommu_remove_group_pasid(group, pasid); in iommu_detach_device_pasid()
3454 WARN_ON(xa_erase(&group->pasid_array, pasid) != domain); in iommu_detach_device_pasid()
3455 mutex_unlock(&group->mutex); in iommu_detach_device_pasid()
3457 iommu_group_put(group); in iommu_detach_device_pasid()
3480 struct iommu_group *group; in iommu_get_domain_for_dev_pasid() local
3482 group = iommu_group_get(dev); in iommu_get_domain_for_dev_pasid()
3483 if (!group) in iommu_get_domain_for_dev_pasid()
3486 xa_lock(&group->pasid_array); in iommu_get_domain_for_dev_pasid()
3487 domain = xa_load(&group->pasid_array, pasid); in iommu_get_domain_for_dev_pasid()
3490 xa_unlock(&group->pasid_array); in iommu_get_domain_for_dev_pasid()
3491 iommu_group_put(group); in iommu_get_domain_for_dev_pasid()