Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 451 insertions, 0 deletions

diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c
new file mode 100644
index 000000000..ed33c6cce
--- /dev/null
+++ b/drivers/iommu/s390-iommu.c
@@ -0,0 +1,451 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * IOMMU API for s390 PCI devices
+ *
+ * Copyright IBM Corp. 2015
+ * Author(s): Gerald Schaefer <gerald.schaefer@de.ibm.com>
+ */
+
+#include <linux/pci.h>
+#include <linux/iommu.h>
+#include <linux/iommu-helper.h>
+#include <linux/sizes.h>
+#include <linux/rculist.h>
+#include <linux/rcupdate.h>
+#include <asm/pci_dma.h>
+
+static const struct iommu_ops s390_iommu_ops;
+
+struct s390_domain {
+	struct iommu_domain	domain;
+	struct list_head	devices;
+	unsigned long		*dma_table;
+	spinlock_t		list_lock;
+	struct rcu_head		rcu;
+};
+
+static struct s390_domain *to_s390_domain(struct iommu_domain *dom)
+{
+	return container_of(dom, struct s390_domain, domain);
+}
+
+static bool s390_iommu_capable(struct device *dev, enum iommu_cap cap)
+{
+	switch (cap) {
+	case IOMMU_CAP_CACHE_COHERENCY:
+		return true;
+	case IOMMU_CAP_INTR_REMAP:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static struct iommu_domain *s390_domain_alloc(unsigned domain_type)
+{
+	struct s390_domain *s390_domain;
+
+	if (domain_type != IOMMU_DOMAIN_UNMANAGED)
+		return NULL;
+
+	s390_domain = kzalloc(sizeof(*s390_domain), GFP_KERNEL);
+	if (!s390_domain)
+		return NULL;
+
+	s390_domain->dma_table = dma_alloc_cpu_table();
+	if (!s390_domain->dma_table) {
+		kfree(s390_domain);
+		return NULL;
+	}
+	s390_domain->domain.geometry.force_aperture = true;
+	s390_domain->domain.geometry.aperture_start = 0;
+	s390_domain->domain.geometry.aperture_end = ZPCI_TABLE_SIZE_RT - 1;
+
+	spin_lock_init(&s390_domain->list_lock);
+	INIT_LIST_HEAD_RCU(&s390_domain->devices);
+
+	return &s390_domain->domain;
+}
+
+static void s390_iommu_rcu_free_domain(struct rcu_head *head)
+{
+	struct s390_domain *s390_domain = container_of(head, struct s390_domain, rcu);
+
+	dma_cleanup_tables(s390_domain->dma_table);
+	kfree(s390_domain);
+}
+
+static void s390_domain_free(struct iommu_domain *domain)
+{
+	struct s390_domain *s390_domain = to_s390_domain(domain);
+
+	rcu_read_lock();
+	WARN_ON(!list_empty(&s390_domain->devices));
+	rcu_read_unlock();
+
+	call_rcu(&s390_domain->rcu, s390_iommu_rcu_free_domain);
+}
+
+static void __s390_iommu_detach_device(struct zpci_dev *zdev)
+{
+	struct s390_domain *s390_domain = zdev->s390_domain;
+	unsigned long flags;
+
+	if (!s390_domain)
+		return;
+
+	spin_lock_irqsave(&s390_domain->list_lock, flags);
+	list_del_rcu(&zdev->iommu_list);
+	spin_unlock_irqrestore(&s390_domain->list_lock, flags);
+
+	zpci_unregister_ioat(zdev, 0);
+	zdev->s390_domain = NULL;
+	zdev->dma_table = NULL;
+}
+
+static int s390_iommu_attach_device(struct iommu_domain *domain,
+				    struct device *dev)
+{
+	struct s390_domain *s390_domain = to_s390_domain(domain);
+	struct zpci_dev *zdev = to_zpci_dev(dev);
+	unsigned long flags;
+	u8 status;
+	int cc;
+
+	if (!zdev)
+		return -ENODEV;
+
+	if (WARN_ON(domain->geometry.aperture_start > zdev->end_dma ||
+		domain->geometry.aperture_end < zdev->start_dma))
+		return -EINVAL;
+
+	if (zdev->s390_domain)
+		__s390_iommu_detach_device(zdev);
+	else if (zdev->dma_table)
+		zpci_dma_exit_device(zdev);
+
+	cc = zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma,
+				virt_to_phys(s390_domain->dma_table), &status);
+	/*
+	 * If the device is undergoing error recovery the reset code
+	 * will re-establish the new domain.
+	 */
+	if (cc && status != ZPCI_PCI_ST_FUNC_NOT_AVAIL)
+		return -EIO;
+	zdev->dma_table = s390_domain->dma_table;
+
+	zdev->dma_table = s390_domain->dma_table;
+	zdev->s390_domain = s390_domain;
+
+	spin_lock_irqsave(&s390_domain->list_lock, flags);
+	list_add_rcu(&zdev->iommu_list, &s390_domain->devices);
+	spin_unlock_irqrestore(&s390_domain->list_lock, flags);
+
+	return 0;
+}
+
+static void s390_iommu_detach_device(struct iommu_domain *domain,
+				     struct device *dev)
+{
+	struct zpci_dev *zdev = to_zpci_dev(dev);
+
+	WARN_ON(zdev->s390_domain != to_s390_domain(domain));
+
+	__s390_iommu_detach_device(zdev);
+	zpci_dma_init_device(zdev);
+}
+
+static void s390_iommu_get_resv_regions(struct device *dev,
+					struct list_head *list)
+{
+	struct zpci_dev *zdev = to_zpci_dev(dev);
+	struct iommu_resv_region *region;
+
+	if (zdev->start_dma) {
+		region = iommu_alloc_resv_region(0, zdev->start_dma, 0,
+						 IOMMU_RESV_RESERVED, GFP_KERNEL);
+		if (!region)
+			return;
+		list_add_tail(&region->list, list);
+	}
+
+	if (zdev->end_dma < ZPCI_TABLE_SIZE_RT - 1) {
+		region = iommu_alloc_resv_region(zdev->end_dma + 1,
+						 ZPCI_TABLE_SIZE_RT - zdev->end_dma - 1,
+						 0, IOMMU_RESV_RESERVED, GFP_KERNEL);
+		if (!region)
+			return;
+		list_add_tail(&region->list, list);
+	}
+}
+
+static struct iommu_device *s390_iommu_probe_device(struct device *dev)
+{
+	struct zpci_dev *zdev;
+
+	if (!dev_is_pci(dev))
+		return ERR_PTR(-ENODEV);
+
+	zdev = to_zpci_dev(dev);
+
+	if (zdev->start_dma > zdev->end_dma ||
+	    zdev->start_dma > ZPCI_TABLE_SIZE_RT - 1)
+		return ERR_PTR(-EINVAL);
+
+	if (zdev->end_dma > ZPCI_TABLE_SIZE_RT - 1)
+		zdev->end_dma = ZPCI_TABLE_SIZE_RT - 1;
+
+	return &zdev->iommu_dev;
+}
+
+static void s390_iommu_release_device(struct device *dev)
+{
+	struct zpci_dev *zdev = to_zpci_dev(dev);
+
+	/*
+	 * release_device is expected to detach any domain currently attached
+	 * to the device, but keep it attached to other devices in the group.
+	 */
+	if (zdev)
+		__s390_iommu_detach_device(zdev);
+}
+
+static void s390_iommu_flush_iotlb_all(struct iommu_domain *domain)
+{
+	struct s390_domain *s390_domain = to_s390_domain(domain);
+	struct zpci_dev *zdev;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(zdev, &s390_domain->devices, iommu_list) {
+		zpci_refresh_trans((u64)zdev->fh << 32, zdev->start_dma,
+				   zdev->end_dma - zdev->start_dma + 1);
+	}
+	rcu_read_unlock();
+}
+
+static void s390_iommu_iotlb_sync(struct iommu_domain *domain,
+				  struct iommu_iotlb_gather *gather)
+{
+	struct s390_domain *s390_domain = to_s390_domain(domain);
+	size_t size = gather->end - gather->start + 1;
+	struct zpci_dev *zdev;
+
+	/* If gather was never added to there is nothing to flush */
+	if (!gather->end)
+		return;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(zdev, &s390_domain->devices, iommu_list) {
+		zpci_refresh_trans((u64)zdev->fh << 32, gather->start,
+				   size);
+	}
+	rcu_read_unlock();
+}
+
+static void s390_iommu_iotlb_sync_map(struct iommu_domain *domain,
+				      unsigned long iova, size_t size)
+{
+	struct s390_domain *s390_domain = to_s390_domain(domain);
+	struct zpci_dev *zdev;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(zdev, &s390_domain->devices, iommu_list) {
+		if (!zdev->tlb_refresh)
+			continue;
+		zpci_refresh_trans((u64)zdev->fh << 32,
+				   iova, size);
+	}
+	rcu_read_unlock();
+}
+
+static int s390_iommu_validate_trans(struct s390_domain *s390_domain,
+				     phys_addr_t pa, dma_addr_t dma_addr,
+				     unsigned long nr_pages, int flags)
+{
+	phys_addr_t page_addr = pa & PAGE_MASK;
+	unsigned long *entry;
+	unsigned long i;
+	int rc;
+
+	for (i = 0; i < nr_pages; i++) {
+		entry = dma_walk_cpu_trans(s390_domain->dma_table, dma_addr);
+		if (unlikely(!entry)) {
+			rc = -ENOMEM;
+			goto undo_cpu_trans;
+		}
+		dma_update_cpu_trans(entry, page_addr, flags);
+		page_addr += PAGE_SIZE;
+		dma_addr += PAGE_SIZE;
+	}
+
+	return 0;
+
+undo_cpu_trans:
+	while (i-- > 0) {
+		dma_addr -= PAGE_SIZE;
+		entry = dma_walk_cpu_trans(s390_domain->dma_table,
+					   dma_addr);
+		if (!entry)
+			break;
+		dma_update_cpu_trans(entry, 0, ZPCI_PTE_INVALID);
+	}
+
+	return rc;
+}
+
+static int s390_iommu_invalidate_trans(struct s390_domain *s390_domain,
+				       dma_addr_t dma_addr, unsigned long nr_pages)
+{
+	unsigned long *entry;
+	unsigned long i;
+	int rc = 0;
+
+	for (i = 0; i < nr_pages; i++) {
+		entry = dma_walk_cpu_trans(s390_domain->dma_table, dma_addr);
+		if (unlikely(!entry)) {
+			rc = -EINVAL;
+			break;
+		}
+		dma_update_cpu_trans(entry, 0, ZPCI_PTE_INVALID);
+		dma_addr += PAGE_SIZE;
+	}
+
+	return rc;
+}
+
+static int s390_iommu_map_pages(struct iommu_domain *domain,
+				unsigned long iova, phys_addr_t paddr,
+				size_t pgsize, size_t pgcount,
+				int prot, gfp_t gfp, size_t *mapped)
+{
+	struct s390_domain *s390_domain = to_s390_domain(domain);
+	size_t size = pgcount << __ffs(pgsize);
+	int flags = ZPCI_PTE_VALID, rc = 0;
+
+	if (pgsize != SZ_4K)
+		return -EINVAL;
+
+	if (iova < s390_domain->domain.geometry.aperture_start ||
+	    (iova + size - 1) > s390_domain->domain.geometry.aperture_end)
+		return -EINVAL;
+
+	if (!IS_ALIGNED(iova | paddr, pgsize))
+		return -EINVAL;
+
+	if (!(prot & IOMMU_READ))
+		return -EINVAL;
+
+	if (!(prot & IOMMU_WRITE))
+		flags |= ZPCI_TABLE_PROTECTED;
+
+	rc = s390_iommu_validate_trans(s390_domain, paddr, iova,
+				       pgcount, flags);
+	if (!rc)
+		*mapped = size;
+
+	return rc;
+}
+
+static phys_addr_t s390_iommu_iova_to_phys(struct iommu_domain *domain,
+					   dma_addr_t iova)
+{
+	struct s390_domain *s390_domain = to_s390_domain(domain);
+	unsigned long *rto, *sto, *pto;
+	unsigned long ste, pte, rte;
+	unsigned int rtx, sx, px;
+	phys_addr_t phys = 0;
+
+	if (iova < domain->geometry.aperture_start ||
+	    iova > domain->geometry.aperture_end)
+		return 0;
+
+	rtx = calc_rtx(iova);
+	sx = calc_sx(iova);
+	px = calc_px(iova);
+	rto = s390_domain->dma_table;
+
+	rte = READ_ONCE(rto[rtx]);
+	if (reg_entry_isvalid(rte)) {
+		sto = get_rt_sto(rte);
+		ste = READ_ONCE(sto[sx]);
+		if (reg_entry_isvalid(ste)) {
+			pto = get_st_pto(ste);
+			pte = READ_ONCE(pto[px]);
+			if (pt_entry_isvalid(pte))
+				phys = pte & ZPCI_PTE_ADDR_MASK;
+		}
+	}
+
+	return phys;
+}
+
+static size_t s390_iommu_unmap_pages(struct iommu_domain *domain,
+				     unsigned long iova,
+				     size_t pgsize, size_t pgcount,
+				     struct iommu_iotlb_gather *gather)
+{
+	struct s390_domain *s390_domain = to_s390_domain(domain);
+	size_t size = pgcount << __ffs(pgsize);
+	int rc;
+
+	if (WARN_ON(iova < s390_domain->domain.geometry.aperture_start ||
+	    (iova + size - 1) > s390_domain->domain.geometry.aperture_end))
+		return 0;
+
+	rc = s390_iommu_invalidate_trans(s390_domain, iova, pgcount);
+	if (rc)
+		return 0;
+
+	iommu_iotlb_gather_add_range(gather, iova, size);
+
+	return size;
+}
+
+int zpci_init_iommu(struct zpci_dev *zdev)
+{
+	int rc = 0;
+
+	rc = iommu_device_sysfs_add(&zdev->iommu_dev, NULL, NULL,
+				    "s390-iommu.%08x", zdev->fid);
+	if (rc)
+		goto out_err;
+
+	rc = iommu_device_register(&zdev->iommu_dev, &s390_iommu_ops, NULL);
+	if (rc)
+		goto out_sysfs;
+
+	return 0;
+
+out_sysfs:
+	iommu_device_sysfs_remove(&zdev->iommu_dev);
+
+out_err:
+	return rc;
+}
+
+void zpci_destroy_iommu(struct zpci_dev *zdev)
+{
+	iommu_device_unregister(&zdev->iommu_dev);
+	iommu_device_sysfs_remove(&zdev->iommu_dev);
+}
+
+static const struct iommu_ops s390_iommu_ops = {
+	.capable = s390_iommu_capable,
+	.domain_alloc = s390_domain_alloc,
+	.probe_device = s390_iommu_probe_device,
+	.release_device = s390_iommu_release_device,
+	.device_group = generic_device_group,
+	.pgsize_bitmap = SZ_4K,
+	.get_resv_regions = s390_iommu_get_resv_regions,
+	.default_domain_ops = &(const struct iommu_domain_ops) {
+		.attach_dev	= s390_iommu_attach_device,
+		.detach_dev	= s390_iommu_detach_device,
+		.map_pages	= s390_iommu_map_pages,
+		.unmap_pages	= s390_iommu_unmap_pages,
+		.flush_iotlb_all = s390_iommu_flush_iotlb_all,
+		.iotlb_sync      = s390_iommu_iotlb_sync,
+		.iotlb_sync_map  = s390_iommu_iotlb_sync_map,
+		.iova_to_phys	= s390_iommu_iova_to_phys,
+		.free		= s390_domain_free,
+	}
+};