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, 482 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/hfi1/netdev_rx.c b/drivers/infiniband/hw/hfi1/netdev_rx.c
new file mode 100644
index 000000000..720d4c85c
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/netdev_rx.c
@@ -0,0 +1,482 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+/*
+ * Copyright(c) 2020 Intel Corporation.
+ *
+ */
+
+/*
+ * This file contains HFI1 support for netdev RX functionality
+ */
+
+#include "sdma.h"
+#include "verbs.h"
+#include "netdev.h"
+#include "hfi.h"
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <rdma/ib_verbs.h>
+
+static int hfi1_netdev_setup_ctxt(struct hfi1_netdev_rx *rx,
+				  struct hfi1_ctxtdata *uctxt)
+{
+	unsigned int rcvctrl_ops;
+	struct hfi1_devdata *dd = rx->dd;
+	int ret;
+
+	uctxt->rhf_rcv_function_map = netdev_rhf_rcv_functions;
+	uctxt->do_interrupt = &handle_receive_interrupt_napi_sp;
+
+	/* Now allocate the RcvHdr queue and eager buffers. */
+	ret = hfi1_create_rcvhdrq(dd, uctxt);
+	if (ret)
+		goto done;
+
+	ret = hfi1_setup_eagerbufs(uctxt);
+	if (ret)
+		goto done;
+
+	clear_rcvhdrtail(uctxt);
+
+	rcvctrl_ops = HFI1_RCVCTRL_CTXT_DIS;
+	rcvctrl_ops |= HFI1_RCVCTRL_INTRAVAIL_DIS;
+
+	if (!HFI1_CAP_KGET_MASK(uctxt->flags, MULTI_PKT_EGR))
+		rcvctrl_ops |= HFI1_RCVCTRL_ONE_PKT_EGR_ENB;
+	if (HFI1_CAP_KGET_MASK(uctxt->flags, NODROP_EGR_FULL))
+		rcvctrl_ops |= HFI1_RCVCTRL_NO_EGR_DROP_ENB;
+	if (HFI1_CAP_KGET_MASK(uctxt->flags, NODROP_RHQ_FULL))
+		rcvctrl_ops |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB;
+	if (HFI1_CAP_KGET_MASK(uctxt->flags, DMA_RTAIL))
+		rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_ENB;
+
+	hfi1_rcvctrl(uctxt->dd, rcvctrl_ops, uctxt);
+done:
+	return ret;
+}
+
+static int hfi1_netdev_allocate_ctxt(struct hfi1_devdata *dd,
+				     struct hfi1_ctxtdata **ctxt)
+{
+	struct hfi1_ctxtdata *uctxt;
+	int ret;
+
+	if (dd->flags & HFI1_FROZEN)
+		return -EIO;
+
+	ret = hfi1_create_ctxtdata(dd->pport, dd->node, &uctxt);
+	if (ret < 0) {
+		dd_dev_err(dd, "Unable to create ctxtdata, failing open\n");
+		return -ENOMEM;
+	}
+
+	uctxt->flags = HFI1_CAP_KGET(MULTI_PKT_EGR) |
+		HFI1_CAP_KGET(NODROP_RHQ_FULL) |
+		HFI1_CAP_KGET(NODROP_EGR_FULL) |
+		HFI1_CAP_KGET(DMA_RTAIL);
+	/* Netdev contexts are always NO_RDMA_RTAIL */
+	uctxt->fast_handler = handle_receive_interrupt_napi_fp;
+	uctxt->slow_handler = handle_receive_interrupt_napi_sp;
+	hfi1_set_seq_cnt(uctxt, 1);
+	uctxt->is_vnic = true;
+
+	hfi1_stats.sps_ctxts++;
+
+	dd_dev_info(dd, "created netdev context %d\n", uctxt->ctxt);
+	*ctxt = uctxt;
+
+	return 0;
+}
+
+static void hfi1_netdev_deallocate_ctxt(struct hfi1_devdata *dd,
+					struct hfi1_ctxtdata *uctxt)
+{
+	flush_wc();
+
+	/*
+	 * Disable receive context and interrupt available, reset all
+	 * RcvCtxtCtrl bits to default values.
+	 */
+	hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS |
+		     HFI1_RCVCTRL_TIDFLOW_DIS |
+		     HFI1_RCVCTRL_INTRAVAIL_DIS |
+		     HFI1_RCVCTRL_ONE_PKT_EGR_DIS |
+		     HFI1_RCVCTRL_NO_RHQ_DROP_DIS |
+		     HFI1_RCVCTRL_NO_EGR_DROP_DIS, uctxt);
+
+	if (uctxt->msix_intr != CCE_NUM_MSIX_VECTORS)
+		msix_free_irq(dd, uctxt->msix_intr);
+
+	uctxt->msix_intr = CCE_NUM_MSIX_VECTORS;
+	uctxt->event_flags = 0;
+
+	hfi1_clear_tids(uctxt);
+	hfi1_clear_ctxt_pkey(dd, uctxt);
+
+	hfi1_stats.sps_ctxts--;
+
+	hfi1_free_ctxt(uctxt);
+}
+
+static int hfi1_netdev_allot_ctxt(struct hfi1_netdev_rx *rx,
+				  struct hfi1_ctxtdata **ctxt)
+{
+	int rc;
+	struct hfi1_devdata *dd = rx->dd;
+
+	rc = hfi1_netdev_allocate_ctxt(dd, ctxt);
+	if (rc) {
+		dd_dev_err(dd, "netdev ctxt alloc failed %d\n", rc);
+		return rc;
+	}
+
+	rc = hfi1_netdev_setup_ctxt(rx, *ctxt);
+	if (rc) {
+		dd_dev_err(dd, "netdev ctxt setup failed %d\n", rc);
+		hfi1_netdev_deallocate_ctxt(dd, *ctxt);
+		*ctxt = NULL;
+	}
+
+	return rc;
+}
+
+/**
+ * hfi1_num_netdev_contexts - Count of netdev recv contexts to use.
+ * @dd: device on which to allocate netdev contexts
+ * @available_contexts: count of available receive contexts
+ * @cpu_mask: mask of possible cpus to include for contexts
+ *
+ * Return: count of physical cores on a node or the remaining available recv
+ * contexts for netdev recv context usage up to the maximum of
+ * HFI1_MAX_NETDEV_CTXTS.
+ * A value of 0 can be returned when acceleration is explicitly turned off,
+ * a memory allocation error occurs or when there are no available contexts.
+ *
+ */
+u32 hfi1_num_netdev_contexts(struct hfi1_devdata *dd, u32 available_contexts,
+			     struct cpumask *cpu_mask)
+{
+	cpumask_var_t node_cpu_mask;
+	unsigned int available_cpus;
+
+	if (!HFI1_CAP_IS_KSET(AIP))
+		return 0;
+
+	/* Always give user contexts priority over netdev contexts */
+	if (available_contexts == 0) {
+		dd_dev_info(dd, "No receive contexts available for netdevs.\n");
+		return 0;
+	}
+
+	if (!zalloc_cpumask_var(&node_cpu_mask, GFP_KERNEL)) {
+		dd_dev_err(dd, "Unable to allocate cpu_mask for netdevs.\n");
+		return 0;
+	}
+
+	cpumask_and(node_cpu_mask, cpu_mask, cpumask_of_node(dd->node));
+
+	available_cpus = cpumask_weight(node_cpu_mask);
+
+	free_cpumask_var(node_cpu_mask);
+
+	return min3(available_cpus, available_contexts,
+		    (u32)HFI1_MAX_NETDEV_CTXTS);
+}
+
+static int hfi1_netdev_rxq_init(struct hfi1_netdev_rx *rx)
+{
+	int i;
+	int rc;
+	struct hfi1_devdata *dd = rx->dd;
+	struct net_device *dev = &rx->rx_napi;
+
+	rx->num_rx_q = dd->num_netdev_contexts;
+	rx->rxq = kcalloc_node(rx->num_rx_q, sizeof(*rx->rxq),
+			       GFP_KERNEL, dd->node);
+
+	if (!rx->rxq) {
+		dd_dev_err(dd, "Unable to allocate netdev queue data\n");
+		return (-ENOMEM);
+	}
+
+	for (i = 0; i < rx->num_rx_q; i++) {
+		struct hfi1_netdev_rxq *rxq = &rx->rxq[i];
+
+		rc = hfi1_netdev_allot_ctxt(rx, &rxq->rcd);
+		if (rc)
+			goto bail_context_irq_failure;
+
+		hfi1_rcd_get(rxq->rcd);
+		rxq->rx = rx;
+		rxq->rcd->napi = &rxq->napi;
+		dd_dev_info(dd, "Setting rcv queue %d napi to context %d\n",
+			    i, rxq->rcd->ctxt);
+		/*
+		 * Disable BUSY_POLL on this NAPI as this is not supported
+		 * right now.
+		 */
+		set_bit(NAPI_STATE_NO_BUSY_POLL, &rxq->napi.state);
+		netif_napi_add(dev, &rxq->napi, hfi1_netdev_rx_napi);
+		rc = msix_netdev_request_rcd_irq(rxq->rcd);
+		if (rc)
+			goto bail_context_irq_failure;
+	}
+
+	return 0;
+
+bail_context_irq_failure:
+	dd_dev_err(dd, "Unable to allot receive context\n");
+	for (; i >= 0; i--) {
+		struct hfi1_netdev_rxq *rxq = &rx->rxq[i];
+
+		if (rxq->rcd) {
+			hfi1_netdev_deallocate_ctxt(dd, rxq->rcd);
+			hfi1_rcd_put(rxq->rcd);
+			rxq->rcd = NULL;
+		}
+	}
+	kfree(rx->rxq);
+	rx->rxq = NULL;
+
+	return rc;
+}
+
+static void hfi1_netdev_rxq_deinit(struct hfi1_netdev_rx *rx)
+{
+	int i;
+	struct hfi1_devdata *dd = rx->dd;
+
+	for (i = 0; i < rx->num_rx_q; i++) {
+		struct hfi1_netdev_rxq *rxq = &rx->rxq[i];
+
+		netif_napi_del(&rxq->napi);
+		hfi1_netdev_deallocate_ctxt(dd, rxq->rcd);
+		hfi1_rcd_put(rxq->rcd);
+		rxq->rcd = NULL;
+	}
+
+	kfree(rx->rxq);
+	rx->rxq = NULL;
+	rx->num_rx_q = 0;
+}
+
+static void enable_queues(struct hfi1_netdev_rx *rx)
+{
+	int i;
+
+	for (i = 0; i < rx->num_rx_q; i++) {
+		struct hfi1_netdev_rxq *rxq = &rx->rxq[i];
+
+		dd_dev_info(rx->dd, "enabling queue %d on context %d\n", i,
+			    rxq->rcd->ctxt);
+		napi_enable(&rxq->napi);
+		hfi1_rcvctrl(rx->dd,
+			     HFI1_RCVCTRL_CTXT_ENB | HFI1_RCVCTRL_INTRAVAIL_ENB,
+			     rxq->rcd);
+	}
+}
+
+static void disable_queues(struct hfi1_netdev_rx *rx)
+{
+	int i;
+
+	msix_netdev_synchronize_irq(rx->dd);
+
+	for (i = 0; i < rx->num_rx_q; i++) {
+		struct hfi1_netdev_rxq *rxq = &rx->rxq[i];
+
+		dd_dev_info(rx->dd, "disabling queue %d on context %d\n", i,
+			    rxq->rcd->ctxt);
+
+		/* wait for napi if it was scheduled */
+		hfi1_rcvctrl(rx->dd,
+			     HFI1_RCVCTRL_CTXT_DIS | HFI1_RCVCTRL_INTRAVAIL_DIS,
+			     rxq->rcd);
+		napi_synchronize(&rxq->napi);
+		napi_disable(&rxq->napi);
+	}
+}
+
+/**
+ * hfi1_netdev_rx_init - Incrememnts netdevs counter. When called first time,
+ * it allocates receive queue data and calls netif_napi_add
+ * for each queue.
+ *
+ * @dd: hfi1 dev data
+ */
+int hfi1_netdev_rx_init(struct hfi1_devdata *dd)
+{
+	struct hfi1_netdev_rx *rx = dd->netdev_rx;
+	int res;
+
+	if (atomic_fetch_inc(&rx->netdevs))
+		return 0;
+
+	mutex_lock(&hfi1_mutex);
+	res = hfi1_netdev_rxq_init(rx);
+	mutex_unlock(&hfi1_mutex);
+	return res;
+}
+
+/**
+ * hfi1_netdev_rx_destroy - Decrements netdevs counter, when it reaches 0
+ * napi is deleted and receive queses memory is freed.
+ *
+ * @dd: hfi1 dev data
+ */
+int hfi1_netdev_rx_destroy(struct hfi1_devdata *dd)
+{
+	struct hfi1_netdev_rx *rx = dd->netdev_rx;
+
+	/* destroy the RX queues only if it is the last netdev going away */
+	if (atomic_fetch_add_unless(&rx->netdevs, -1, 0) == 1) {
+		mutex_lock(&hfi1_mutex);
+		hfi1_netdev_rxq_deinit(rx);
+		mutex_unlock(&hfi1_mutex);
+	}
+
+	return 0;
+}
+
+/**
+ * hfi1_alloc_rx - Allocates the rx support structure
+ * @dd: hfi1 dev data
+ *
+ * Allocate the rx structure to support gathering the receive
+ * resources and the dummy netdev.
+ *
+ * Updates dd struct pointer upon success.
+ *
+ * Return: 0 (success) -error on failure
+ *
+ */
+int hfi1_alloc_rx(struct hfi1_devdata *dd)
+{
+	struct hfi1_netdev_rx *rx;
+
+	dd_dev_info(dd, "allocating rx size %ld\n", sizeof(*rx));
+	rx = kzalloc_node(sizeof(*rx), GFP_KERNEL, dd->node);
+
+	if (!rx)
+		return -ENOMEM;
+	rx->dd = dd;
+	init_dummy_netdev(&rx->rx_napi);
+
+	xa_init(&rx->dev_tbl);
+	atomic_set(&rx->enabled, 0);
+	atomic_set(&rx->netdevs, 0);
+	dd->netdev_rx = rx;
+
+	return 0;
+}
+
+void hfi1_free_rx(struct hfi1_devdata *dd)
+{
+	if (dd->netdev_rx) {
+		dd_dev_info(dd, "hfi1 rx freed\n");
+		kfree(dd->netdev_rx);
+		dd->netdev_rx = NULL;
+	}
+}
+
+/**
+ * hfi1_netdev_enable_queues - This is napi enable function.
+ * It enables napi objects associated with queues.
+ * When at least one device has called it it increments atomic counter.
+ * Disable function decrements counter and when it is 0,
+ * calls napi_disable for every queue.
+ *
+ * @dd: hfi1 dev data
+ */
+void hfi1_netdev_enable_queues(struct hfi1_devdata *dd)
+{
+	struct hfi1_netdev_rx *rx;
+
+	if (!dd->netdev_rx)
+		return;
+
+	rx = dd->netdev_rx;
+	if (atomic_fetch_inc(&rx->enabled))
+		return;
+
+	mutex_lock(&hfi1_mutex);
+	enable_queues(rx);
+	mutex_unlock(&hfi1_mutex);
+}
+
+void hfi1_netdev_disable_queues(struct hfi1_devdata *dd)
+{
+	struct hfi1_netdev_rx *rx;
+
+	if (!dd->netdev_rx)
+		return;
+
+	rx = dd->netdev_rx;
+	if (atomic_dec_if_positive(&rx->enabled))
+		return;
+
+	mutex_lock(&hfi1_mutex);
+	disable_queues(rx);
+	mutex_unlock(&hfi1_mutex);
+}
+
+/**
+ * hfi1_netdev_add_data - Registers data with unique identifier
+ * to be requested later this is needed for VNIC and IPoIB VLANs
+ * implementations.
+ * This call is protected by mutex idr_lock.
+ *
+ * @dd: hfi1 dev data
+ * @id: requested integer id up to INT_MAX
+ * @data: data to be associated with index
+ */
+int hfi1_netdev_add_data(struct hfi1_devdata *dd, int id, void *data)
+{
+	struct hfi1_netdev_rx *rx = dd->netdev_rx;
+
+	return xa_insert(&rx->dev_tbl, id, data, GFP_NOWAIT);
+}
+
+/**
+ * hfi1_netdev_remove_data - Removes data with previously given id.
+ * Returns the reference to removed entry.
+ *
+ * @dd: hfi1 dev data
+ * @id: requested integer id up to INT_MAX
+ */
+void *hfi1_netdev_remove_data(struct hfi1_devdata *dd, int id)
+{
+	struct hfi1_netdev_rx *rx = dd->netdev_rx;
+
+	return xa_erase(&rx->dev_tbl, id);
+}
+
+/**
+ * hfi1_netdev_get_data - Gets data with given id
+ *
+ * @dd: hfi1 dev data
+ * @id: requested integer id up to INT_MAX
+ */
+void *hfi1_netdev_get_data(struct hfi1_devdata *dd, int id)
+{
+	struct hfi1_netdev_rx *rx = dd->netdev_rx;
+
+	return xa_load(&rx->dev_tbl, id);
+}
+
+/**
+ * hfi1_netdev_get_first_data - Gets first entry with greater or equal id.
+ *
+ * @dd: hfi1 dev data
+ * @start_id: requested integer id up to INT_MAX
+ */
+void *hfi1_netdev_get_first_data(struct hfi1_devdata *dd, int *start_id)
+{
+	struct hfi1_netdev_rx *rx = dd->netdev_rx;
+	unsigned long index = *start_id;
+	void *ret;
+
+	ret = xa_find(&rx->dev_tbl, &index, UINT_MAX, XA_PRESENT);
+	*start_id = (int)index;
+	return ret;
+}