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, 567 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c
new file mode 100644
index 000000000..fe86fbd58
--- /dev/null
+++ b/drivers/net/ethernet/sun/sunvnet.c
@@ -0,0 +1,567 @@
+// SPDX-License-Identifier: GPL-2.0
+/* sunvnet.c: Sun LDOM Virtual Network Driver.
+ *
+ * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
+ * Copyright (C) 2016-2017 Oracle. All rights reserved.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/ethtool.h>
+#include <linux/etherdevice.h>
+#include <linux/mutex.h>
+#include <linux/highmem.h>
+#include <linux/if_vlan.h>
+
+#if IS_ENABLED(CONFIG_IPV6)
+#include <linux/icmpv6.h>
+#endif
+
+#include <net/ip.h>
+#include <net/icmp.h>
+#include <net/route.h>
+
+#include <asm/vio.h>
+#include <asm/ldc.h>
+
+#include "sunvnet_common.h"
+
+/* length of time before we decide the hardware is borked,
+ * and dev->tx_timeout() should be called to fix the problem
+ */
+#define VNET_TX_TIMEOUT			(5 * HZ)
+
+#define DRV_MODULE_NAME		"sunvnet"
+#define DRV_MODULE_VERSION	"2.0"
+#define DRV_MODULE_RELDATE	"February 3, 2017"
+
+static char version[] =
+	DRV_MODULE_NAME " " DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")";
+MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
+MODULE_DESCRIPTION("Sun LDOM virtual network driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_MODULE_VERSION);
+
+/* Ordered from largest major to lowest */
+static struct vio_version vnet_versions[] = {
+	{ .major = 1, .minor = 8 },
+	{ .major = 1, .minor = 7 },
+	{ .major = 1, .minor = 6 },
+	{ .major = 1, .minor = 0 },
+};
+
+static void vnet_get_drvinfo(struct net_device *dev,
+			     struct ethtool_drvinfo *info)
+{
+	strscpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
+	strscpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
+}
+
+static u32 vnet_get_msglevel(struct net_device *dev)
+{
+	struct vnet *vp = netdev_priv(dev);
+
+	return vp->msg_enable;
+}
+
+static void vnet_set_msglevel(struct net_device *dev, u32 value)
+{
+	struct vnet *vp = netdev_priv(dev);
+
+	vp->msg_enable = value;
+}
+
+static const struct {
+	const char string[ETH_GSTRING_LEN];
+} ethtool_stats_keys[] = {
+	{ "rx_packets" },
+	{ "tx_packets" },
+	{ "rx_bytes" },
+	{ "tx_bytes" },
+	{ "rx_errors" },
+	{ "tx_errors" },
+	{ "rx_dropped" },
+	{ "tx_dropped" },
+	{ "multicast" },
+	{ "rx_length_errors" },
+	{ "rx_frame_errors" },
+	{ "rx_missed_errors" },
+	{ "tx_carrier_errors" },
+	{ "nports" },
+};
+
+static int vnet_get_sset_count(struct net_device *dev, int sset)
+{
+	struct vnet *vp = (struct vnet *)netdev_priv(dev);
+
+	switch (sset) {
+	case ETH_SS_STATS:
+		return ARRAY_SIZE(ethtool_stats_keys)
+			+ (NUM_VNET_PORT_STATS * vp->nports);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static void vnet_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
+{
+	struct vnet *vp = (struct vnet *)netdev_priv(dev);
+	struct vnet_port *port;
+	char *p = (char *)buf;
+
+	switch (stringset) {
+	case ETH_SS_STATS:
+		memcpy(buf, &ethtool_stats_keys, sizeof(ethtool_stats_keys));
+		p += sizeof(ethtool_stats_keys);
+
+		rcu_read_lock();
+		list_for_each_entry_rcu(port, &vp->port_list, list) {
+			snprintf(p, ETH_GSTRING_LEN, "p%u.%s-%pM",
+				 port->q_index, port->switch_port ? "s" : "q",
+				 port->raddr);
+			p += ETH_GSTRING_LEN;
+			snprintf(p, ETH_GSTRING_LEN, "p%u.rx_packets",
+				 port->q_index);
+			p += ETH_GSTRING_LEN;
+			snprintf(p, ETH_GSTRING_LEN, "p%u.tx_packets",
+				 port->q_index);
+			p += ETH_GSTRING_LEN;
+			snprintf(p, ETH_GSTRING_LEN, "p%u.rx_bytes",
+				 port->q_index);
+			p += ETH_GSTRING_LEN;
+			snprintf(p, ETH_GSTRING_LEN, "p%u.tx_bytes",
+				 port->q_index);
+			p += ETH_GSTRING_LEN;
+			snprintf(p, ETH_GSTRING_LEN, "p%u.event_up",
+				 port->q_index);
+			p += ETH_GSTRING_LEN;
+			snprintf(p, ETH_GSTRING_LEN, "p%u.event_reset",
+				 port->q_index);
+			p += ETH_GSTRING_LEN;
+		}
+		rcu_read_unlock();
+		break;
+	default:
+		WARN_ON(1);
+		break;
+	}
+}
+
+static void vnet_get_ethtool_stats(struct net_device *dev,
+				   struct ethtool_stats *estats, u64 *data)
+{
+	struct vnet *vp = (struct vnet *)netdev_priv(dev);
+	struct vnet_port *port;
+	int i = 0;
+
+	data[i++] = dev->stats.rx_packets;
+	data[i++] = dev->stats.tx_packets;
+	data[i++] = dev->stats.rx_bytes;
+	data[i++] = dev->stats.tx_bytes;
+	data[i++] = dev->stats.rx_errors;
+	data[i++] = dev->stats.tx_errors;
+	data[i++] = dev->stats.rx_dropped;
+	data[i++] = dev->stats.tx_dropped;
+	data[i++] = dev->stats.multicast;
+	data[i++] = dev->stats.rx_length_errors;
+	data[i++] = dev->stats.rx_frame_errors;
+	data[i++] = dev->stats.rx_missed_errors;
+	data[i++] = dev->stats.tx_carrier_errors;
+	data[i++] = vp->nports;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(port, &vp->port_list, list) {
+		data[i++] = port->q_index;
+		data[i++] = port->stats.rx_packets;
+		data[i++] = port->stats.tx_packets;
+		data[i++] = port->stats.rx_bytes;
+		data[i++] = port->stats.tx_bytes;
+		data[i++] = port->stats.event_up;
+		data[i++] = port->stats.event_reset;
+	}
+	rcu_read_unlock();
+}
+
+static const struct ethtool_ops vnet_ethtool_ops = {
+	.get_drvinfo		= vnet_get_drvinfo,
+	.get_msglevel		= vnet_get_msglevel,
+	.set_msglevel		= vnet_set_msglevel,
+	.get_link		= ethtool_op_get_link,
+	.get_sset_count		= vnet_get_sset_count,
+	.get_strings		= vnet_get_strings,
+	.get_ethtool_stats	= vnet_get_ethtool_stats,
+};
+
+static LIST_HEAD(vnet_list);
+static DEFINE_MUTEX(vnet_list_mutex);
+
+static struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb)
+{
+	unsigned int hash = vnet_hashfn(skb->data);
+	struct hlist_head *hp = &vp->port_hash[hash];
+	struct vnet_port *port;
+
+	hlist_for_each_entry_rcu(port, hp, hash) {
+		if (!sunvnet_port_is_up_common(port))
+			continue;
+		if (ether_addr_equal(port->raddr, skb->data))
+			return port;
+	}
+	list_for_each_entry_rcu(port, &vp->port_list, list) {
+		if (!port->switch_port)
+			continue;
+		if (!sunvnet_port_is_up_common(port))
+			continue;
+		return port;
+	}
+	return NULL;
+}
+
+/* func arg to vnet_start_xmit_common() to get the proper tx port */
+static struct vnet_port *vnet_tx_port_find(struct sk_buff *skb,
+					   struct net_device *dev)
+{
+	struct vnet *vp = netdev_priv(dev);
+
+	return __tx_port_find(vp, skb);
+}
+
+static u16 vnet_select_queue(struct net_device *dev, struct sk_buff *skb,
+			     struct net_device *sb_dev)
+{
+	struct vnet *vp = netdev_priv(dev);
+	struct vnet_port *port = __tx_port_find(vp, skb);
+
+	if (!port)
+		return 0;
+
+	return port->q_index;
+}
+
+/* Wrappers to common functions */
+static netdev_tx_t vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	return sunvnet_start_xmit_common(skb, dev, vnet_tx_port_find);
+}
+
+static void vnet_set_rx_mode(struct net_device *dev)
+{
+	struct vnet *vp = netdev_priv(dev);
+
+	return sunvnet_set_rx_mode_common(dev, vp);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void vnet_poll_controller(struct net_device *dev)
+{
+	struct vnet *vp = netdev_priv(dev);
+
+	return sunvnet_poll_controller_common(dev, vp);
+}
+#endif
+
+static const struct net_device_ops vnet_ops = {
+	.ndo_open		= sunvnet_open_common,
+	.ndo_stop		= sunvnet_close_common,
+	.ndo_set_rx_mode	= vnet_set_rx_mode,
+	.ndo_set_mac_address	= sunvnet_set_mac_addr_common,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_tx_timeout		= sunvnet_tx_timeout_common,
+	.ndo_start_xmit		= vnet_start_xmit,
+	.ndo_select_queue	= vnet_select_queue,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller	= vnet_poll_controller,
+#endif
+};
+
+static struct vnet *vnet_new(const u64 *local_mac,
+			     struct vio_dev *vdev)
+{
+	struct net_device *dev;
+	u8 addr[ETH_ALEN];
+	struct vnet *vp;
+	int err, i;
+
+	dev = alloc_etherdev_mqs(sizeof(*vp), VNET_MAX_TXQS, 1);
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+	dev->needed_headroom = VNET_PACKET_SKIP + 8;
+	dev->needed_tailroom = 8;
+
+	for (i = 0; i < ETH_ALEN; i++)
+		addr[i] = (*local_mac >> (5 - i) * 8) & 0xff;
+	eth_hw_addr_set(dev, addr);
+
+	vp = netdev_priv(dev);
+
+	spin_lock_init(&vp->lock);
+	vp->dev = dev;
+
+	INIT_LIST_HEAD(&vp->port_list);
+	for (i = 0; i < VNET_PORT_HASH_SIZE; i++)
+		INIT_HLIST_HEAD(&vp->port_hash[i]);
+	INIT_LIST_HEAD(&vp->list);
+	vp->local_mac = *local_mac;
+
+	dev->netdev_ops = &vnet_ops;
+	dev->ethtool_ops = &vnet_ethtool_ops;
+	dev->watchdog_timeo = VNET_TX_TIMEOUT;
+
+	dev->hw_features = NETIF_F_TSO | NETIF_F_GSO | NETIF_F_ALL_TSO |
+			   NETIF_F_HW_CSUM | NETIF_F_SG;
+	dev->features = dev->hw_features;
+
+	/* MTU range: 68 - 65535 */
+	dev->min_mtu = ETH_MIN_MTU;
+	dev->max_mtu = VNET_MAX_MTU;
+
+	SET_NETDEV_DEV(dev, &vdev->dev);
+
+	err = register_netdev(dev);
+	if (err) {
+		pr_err("Cannot register net device, aborting\n");
+		goto err_out_free_dev;
+	}
+
+	netdev_info(dev, "Sun LDOM vnet %pM\n", dev->dev_addr);
+
+	list_add(&vp->list, &vnet_list);
+
+	return vp;
+
+err_out_free_dev:
+	free_netdev(dev);
+
+	return ERR_PTR(err);
+}
+
+static struct vnet *vnet_find_or_create(const u64 *local_mac,
+					struct vio_dev *vdev)
+{
+	struct vnet *iter, *vp;
+
+	mutex_lock(&vnet_list_mutex);
+	vp = NULL;
+	list_for_each_entry(iter, &vnet_list, list) {
+		if (iter->local_mac == *local_mac) {
+			vp = iter;
+			break;
+		}
+	}
+	if (!vp)
+		vp = vnet_new(local_mac, vdev);
+	mutex_unlock(&vnet_list_mutex);
+
+	return vp;
+}
+
+static void vnet_cleanup(void)
+{
+	struct vnet *vp;
+	struct net_device *dev;
+
+	mutex_lock(&vnet_list_mutex);
+	while (!list_empty(&vnet_list)) {
+		vp = list_first_entry(&vnet_list, struct vnet, list);
+		list_del(&vp->list);
+		dev = vp->dev;
+		/* vio_unregister_driver() should have cleaned up port_list */
+		BUG_ON(!list_empty(&vp->port_list));
+		unregister_netdev(dev);
+		free_netdev(dev);
+	}
+	mutex_unlock(&vnet_list_mutex);
+}
+
+static const char *local_mac_prop = "local-mac-address";
+
+static struct vnet *vnet_find_parent(struct mdesc_handle *hp,
+				     u64 port_node,
+				     struct vio_dev *vdev)
+{
+	const u64 *local_mac = NULL;
+	u64 a;
+
+	mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
+		u64 target = mdesc_arc_target(hp, a);
+		const char *name;
+
+		name = mdesc_get_property(hp, target, "name", NULL);
+		if (!name || strcmp(name, "network"))
+			continue;
+
+		local_mac = mdesc_get_property(hp, target,
+					       local_mac_prop, NULL);
+		if (local_mac)
+			break;
+	}
+	if (!local_mac)
+		return ERR_PTR(-ENODEV);
+
+	return vnet_find_or_create(local_mac, vdev);
+}
+
+static struct ldc_channel_config vnet_ldc_cfg = {
+	.event		= sunvnet_event_common,
+	.mtu		= 64,
+	.mode		= LDC_MODE_UNRELIABLE,
+};
+
+static struct vio_driver_ops vnet_vio_ops = {
+	.send_attr		= sunvnet_send_attr_common,
+	.handle_attr		= sunvnet_handle_attr_common,
+	.handshake_complete	= sunvnet_handshake_complete_common,
+};
+
+const char *remote_macaddr_prop = "remote-mac-address";
+
+static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
+{
+	struct mdesc_handle *hp;
+	struct vnet_port *port;
+	unsigned long flags;
+	struct vnet *vp;
+	const u64 *rmac;
+	int len, i, err, switch_port;
+
+	hp = mdesc_grab();
+
+	vp = vnet_find_parent(hp, vdev->mp, vdev);
+	if (IS_ERR(vp)) {
+		pr_err("Cannot find port parent vnet\n");
+		err = PTR_ERR(vp);
+		goto err_out_put_mdesc;
+	}
+
+	rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
+	err = -ENODEV;
+	if (!rmac) {
+		pr_err("Port lacks %s property\n", remote_macaddr_prop);
+		goto err_out_put_mdesc;
+	}
+
+	port = kzalloc(sizeof(*port), GFP_KERNEL);
+	err = -ENOMEM;
+	if (!port)
+		goto err_out_put_mdesc;
+
+	for (i = 0; i < ETH_ALEN; i++)
+		port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff;
+
+	port->vp = vp;
+
+	err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
+			      vnet_versions, ARRAY_SIZE(vnet_versions),
+			      &vnet_vio_ops, vp->dev->name);
+	if (err)
+		goto err_out_free_port;
+
+	err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port);
+	if (err)
+		goto err_out_free_port;
+
+	netif_napi_add(port->vp->dev, &port->napi, sunvnet_poll_common);
+
+	INIT_HLIST_NODE(&port->hash);
+	INIT_LIST_HEAD(&port->list);
+
+	switch_port = 0;
+	if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL))
+		switch_port = 1;
+	port->switch_port = switch_port;
+	port->tso = true;
+	port->tsolen = 0;
+
+	spin_lock_irqsave(&vp->lock, flags);
+	if (switch_port)
+		list_add_rcu(&port->list, &vp->port_list);
+	else
+		list_add_tail_rcu(&port->list, &vp->port_list);
+	hlist_add_head_rcu(&port->hash,
+			   &vp->port_hash[vnet_hashfn(port->raddr)]);
+	sunvnet_port_add_txq_common(port);
+	spin_unlock_irqrestore(&vp->lock, flags);
+
+	dev_set_drvdata(&vdev->dev, port);
+
+	pr_info("%s: PORT ( remote-mac %pM%s )\n",
+		vp->dev->name, port->raddr, switch_port ? " switch-port" : "");
+
+	timer_setup(&port->clean_timer, sunvnet_clean_timer_expire_common, 0);
+
+	napi_enable(&port->napi);
+	vio_port_up(&port->vio);
+
+	mdesc_release(hp);
+
+	return 0;
+
+err_out_free_port:
+	kfree(port);
+
+err_out_put_mdesc:
+	mdesc_release(hp);
+	return err;
+}
+
+static void vnet_port_remove(struct vio_dev *vdev)
+{
+	struct vnet_port *port = dev_get_drvdata(&vdev->dev);
+
+	if (port) {
+		del_timer_sync(&port->vio.timer);
+
+		napi_disable(&port->napi);
+
+		list_del_rcu(&port->list);
+		hlist_del_rcu(&port->hash);
+
+		synchronize_rcu();
+		timer_shutdown_sync(&port->clean_timer);
+		sunvnet_port_rm_txq_common(port);
+		netif_napi_del(&port->napi);
+		sunvnet_port_free_tx_bufs_common(port);
+		vio_ldc_free(&port->vio);
+
+		dev_set_drvdata(&vdev->dev, NULL);
+
+		kfree(port);
+	}
+}
+
+static const struct vio_device_id vnet_port_match[] = {
+	{
+		.type = "vnet-port",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(vio, vnet_port_match);
+
+static struct vio_driver vnet_port_driver = {
+	.id_table	= vnet_port_match,
+	.probe		= vnet_port_probe,
+	.remove		= vnet_port_remove,
+	.name		= "vnet_port",
+};
+
+static int __init vnet_init(void)
+{
+	pr_info("%s\n", version);
+	return vio_register_driver(&vnet_port_driver);
+}
+
+static void __exit vnet_exit(void)
+{
+	vio_unregister_driver(&vnet_port_driver);
+	vnet_cleanup();
+}
+
+module_init(vnet_init);
+module_exit(vnet_exit);