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, 1114 insertions, 0 deletions

diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
new file mode 100644
index 000000000..025b35bf0
--- /dev/null
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -0,0 +1,1114 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
+ * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
+ */
+
+#include <linux/dma-mapping.h>
+#include <net/addrconf.h>
+#include <rdma/uverbs_ioctl.h>
+
+#include "rxe.h"
+#include "rxe_queue.h"
+#include "rxe_hw_counters.h"
+
+static int rxe_query_device(struct ib_device *dev,
+			    struct ib_device_attr *attr,
+			    struct ib_udata *uhw)
+{
+	struct rxe_dev *rxe = to_rdev(dev);
+
+	if (uhw->inlen || uhw->outlen)
+		return -EINVAL;
+
+	*attr = rxe->attr;
+	return 0;
+}
+
+static int rxe_query_port(struct ib_device *dev,
+			  u32 port_num, struct ib_port_attr *attr)
+{
+	struct rxe_dev *rxe = to_rdev(dev);
+	int rc;
+
+	/* *attr being zeroed by the caller, avoid zeroing it here */
+	*attr = rxe->port.attr;
+
+	mutex_lock(&rxe->usdev_lock);
+	rc = ib_get_eth_speed(dev, port_num, &attr->active_speed,
+			      &attr->active_width);
+
+	if (attr->state == IB_PORT_ACTIVE)
+		attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP;
+	else if (dev_get_flags(rxe->ndev) & IFF_UP)
+		attr->phys_state = IB_PORT_PHYS_STATE_POLLING;
+	else
+		attr->phys_state = IB_PORT_PHYS_STATE_DISABLED;
+
+	mutex_unlock(&rxe->usdev_lock);
+
+	return rc;
+}
+
+static int rxe_query_pkey(struct ib_device *device,
+			  u32 port_num, u16 index, u16 *pkey)
+{
+	if (index > 0)
+		return -EINVAL;
+
+	*pkey = IB_DEFAULT_PKEY_FULL;
+	return 0;
+}
+
+static int rxe_modify_device(struct ib_device *dev,
+			     int mask, struct ib_device_modify *attr)
+{
+	struct rxe_dev *rxe = to_rdev(dev);
+
+	if (mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
+		     IB_DEVICE_MODIFY_NODE_DESC))
+		return -EOPNOTSUPP;
+
+	if (mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
+		rxe->attr.sys_image_guid = cpu_to_be64(attr->sys_image_guid);
+
+	if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
+		memcpy(rxe->ib_dev.node_desc,
+		       attr->node_desc, sizeof(rxe->ib_dev.node_desc));
+	}
+
+	return 0;
+}
+
+static int rxe_modify_port(struct ib_device *dev,
+			   u32 port_num, int mask, struct ib_port_modify *attr)
+{
+	struct rxe_dev *rxe = to_rdev(dev);
+	struct rxe_port *port;
+
+	port = &rxe->port;
+
+	port->attr.port_cap_flags |= attr->set_port_cap_mask;
+	port->attr.port_cap_flags &= ~attr->clr_port_cap_mask;
+
+	if (mask & IB_PORT_RESET_QKEY_CNTR)
+		port->attr.qkey_viol_cntr = 0;
+
+	return 0;
+}
+
+static enum rdma_link_layer rxe_get_link_layer(struct ib_device *dev,
+					       u32 port_num)
+{
+	return IB_LINK_LAYER_ETHERNET;
+}
+
+static int rxe_alloc_ucontext(struct ib_ucontext *ibuc, struct ib_udata *udata)
+{
+	struct rxe_dev *rxe = to_rdev(ibuc->device);
+	struct rxe_ucontext *uc = to_ruc(ibuc);
+
+	return rxe_add_to_pool(&rxe->uc_pool, uc);
+}
+
+static void rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
+{
+	struct rxe_ucontext *uc = to_ruc(ibuc);
+
+	rxe_cleanup(uc);
+}
+
+static int rxe_port_immutable(struct ib_device *dev, u32 port_num,
+			      struct ib_port_immutable *immutable)
+{
+	int err;
+	struct ib_port_attr attr;
+
+	immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
+
+	err = ib_query_port(dev, port_num, &attr);
+	if (err)
+		return err;
+
+	immutable->pkey_tbl_len = attr.pkey_tbl_len;
+	immutable->gid_tbl_len = attr.gid_tbl_len;
+	immutable->max_mad_size = IB_MGMT_MAD_SIZE;
+
+	return 0;
+}
+
+static int rxe_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
+{
+	struct rxe_dev *rxe = to_rdev(ibpd->device);
+	struct rxe_pd *pd = to_rpd(ibpd);
+
+	return rxe_add_to_pool(&rxe->pd_pool, pd);
+}
+
+static int rxe_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
+{
+	struct rxe_pd *pd = to_rpd(ibpd);
+
+	rxe_cleanup(pd);
+	return 0;
+}
+
+static int rxe_create_ah(struct ib_ah *ibah,
+			 struct rdma_ah_init_attr *init_attr,
+			 struct ib_udata *udata)
+
+{
+	struct rxe_dev *rxe = to_rdev(ibah->device);
+	struct rxe_ah *ah = to_rah(ibah);
+	struct rxe_create_ah_resp __user *uresp = NULL;
+	int err;
+
+	if (udata) {
+		/* test if new user provider */
+		if (udata->outlen >= sizeof(*uresp))
+			uresp = udata->outbuf;
+		ah->is_user = true;
+	} else {
+		ah->is_user = false;
+	}
+
+	err = rxe_add_to_pool_ah(&rxe->ah_pool, ah,
+			init_attr->flags & RDMA_CREATE_AH_SLEEPABLE);
+	if (err)
+		return err;
+
+	/* create index > 0 */
+	ah->ah_num = ah->elem.index;
+
+	err = rxe_ah_chk_attr(ah, init_attr->ah_attr);
+	if (err) {
+		rxe_cleanup(ah);
+		return err;
+	}
+
+	if (uresp) {
+		/* only if new user provider */
+		err = copy_to_user(&uresp->ah_num, &ah->ah_num,
+					 sizeof(uresp->ah_num));
+		if (err) {
+			rxe_cleanup(ah);
+			return -EFAULT;
+		}
+	} else if (ah->is_user) {
+		/* only if old user provider */
+		ah->ah_num = 0;
+	}
+
+	rxe_init_av(init_attr->ah_attr, &ah->av);
+	rxe_finalize(ah);
+
+	return 0;
+}
+
+static int rxe_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
+{
+	int err;
+	struct rxe_ah *ah = to_rah(ibah);
+
+	err = rxe_ah_chk_attr(ah, attr);
+	if (err)
+		return err;
+
+	rxe_init_av(attr, &ah->av);
+	return 0;
+}
+
+static int rxe_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
+{
+	struct rxe_ah *ah = to_rah(ibah);
+
+	memset(attr, 0, sizeof(*attr));
+	attr->type = ibah->type;
+	rxe_av_to_attr(&ah->av, attr);
+	return 0;
+}
+
+static int rxe_destroy_ah(struct ib_ah *ibah, u32 flags)
+{
+	struct rxe_ah *ah = to_rah(ibah);
+
+	rxe_cleanup_ah(ah, flags & RDMA_DESTROY_AH_SLEEPABLE);
+
+	return 0;
+}
+
+static int post_one_recv(struct rxe_rq *rq, const struct ib_recv_wr *ibwr)
+{
+	int i;
+	u32 length;
+	struct rxe_recv_wqe *recv_wqe;
+	int num_sge = ibwr->num_sge;
+	int full;
+
+	full = queue_full(rq->queue, QUEUE_TYPE_TO_DRIVER);
+	if (unlikely(full))
+		return -ENOMEM;
+
+	if (unlikely(num_sge > rq->max_sge))
+		return -EINVAL;
+
+	length = 0;
+	for (i = 0; i < num_sge; i++)
+		length += ibwr->sg_list[i].length;
+
+	recv_wqe = queue_producer_addr(rq->queue, QUEUE_TYPE_TO_DRIVER);
+	recv_wqe->wr_id = ibwr->wr_id;
+
+	memcpy(recv_wqe->dma.sge, ibwr->sg_list,
+	       num_sge * sizeof(struct ib_sge));
+
+	recv_wqe->dma.length		= length;
+	recv_wqe->dma.resid		= length;
+	recv_wqe->dma.num_sge		= num_sge;
+	recv_wqe->dma.cur_sge		= 0;
+	recv_wqe->dma.sge_offset	= 0;
+
+	queue_advance_producer(rq->queue, QUEUE_TYPE_TO_DRIVER);
+
+	return 0;
+}
+
+static int rxe_create_srq(struct ib_srq *ibsrq, struct ib_srq_init_attr *init,
+			  struct ib_udata *udata)
+{
+	int err;
+	struct rxe_dev *rxe = to_rdev(ibsrq->device);
+	struct rxe_pd *pd = to_rpd(ibsrq->pd);
+	struct rxe_srq *srq = to_rsrq(ibsrq);
+	struct rxe_create_srq_resp __user *uresp = NULL;
+
+	if (udata) {
+		if (udata->outlen < sizeof(*uresp))
+			return -EINVAL;
+		uresp = udata->outbuf;
+	}
+
+	if (init->srq_type != IB_SRQT_BASIC)
+		return -EOPNOTSUPP;
+
+	err = rxe_srq_chk_init(rxe, init);
+	if (err)
+		return err;
+
+	err = rxe_add_to_pool(&rxe->srq_pool, srq);
+	if (err)
+		return err;
+
+	rxe_get(pd);
+	srq->pd = pd;
+
+	err = rxe_srq_from_init(rxe, srq, init, udata, uresp);
+	if (err)
+		goto err_cleanup;
+
+	return 0;
+
+err_cleanup:
+	rxe_cleanup(srq);
+
+	return err;
+}
+
+static int rxe_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
+			  enum ib_srq_attr_mask mask,
+			  struct ib_udata *udata)
+{
+	int err;
+	struct rxe_srq *srq = to_rsrq(ibsrq);
+	struct rxe_dev *rxe = to_rdev(ibsrq->device);
+	struct rxe_modify_srq_cmd ucmd = {};
+
+	if (udata) {
+		if (udata->inlen < sizeof(ucmd))
+			return -EINVAL;
+
+		err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
+		if (err)
+			return err;
+	}
+
+	err = rxe_srq_chk_attr(rxe, srq, attr, mask);
+	if (err)
+		return err;
+
+	return rxe_srq_from_attr(rxe, srq, attr, mask, &ucmd, udata);
+}
+
+static int rxe_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
+{
+	struct rxe_srq *srq = to_rsrq(ibsrq);
+
+	if (srq->error)
+		return -EINVAL;
+
+	attr->max_wr = srq->rq.queue->buf->index_mask;
+	attr->max_sge = srq->rq.max_sge;
+	attr->srq_limit = srq->limit;
+	return 0;
+}
+
+static int rxe_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata)
+{
+	struct rxe_srq *srq = to_rsrq(ibsrq);
+
+	rxe_cleanup(srq);
+	return 0;
+}
+
+static int rxe_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr,
+			     const struct ib_recv_wr **bad_wr)
+{
+	int err = 0;
+	struct rxe_srq *srq = to_rsrq(ibsrq);
+	unsigned long flags;
+
+	spin_lock_irqsave(&srq->rq.producer_lock, flags);
+
+	while (wr) {
+		err = post_one_recv(&srq->rq, wr);
+		if (unlikely(err))
+			break;
+		wr = wr->next;
+	}
+
+	spin_unlock_irqrestore(&srq->rq.producer_lock, flags);
+
+	if (err)
+		*bad_wr = wr;
+
+	return err;
+}
+
+static int rxe_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init,
+			 struct ib_udata *udata)
+{
+	int err;
+	struct rxe_dev *rxe = to_rdev(ibqp->device);
+	struct rxe_pd *pd = to_rpd(ibqp->pd);
+	struct rxe_qp *qp = to_rqp(ibqp);
+	struct rxe_create_qp_resp __user *uresp = NULL;
+
+	if (udata) {
+		if (udata->outlen < sizeof(*uresp))
+			return -EINVAL;
+		uresp = udata->outbuf;
+	}
+
+	if (init->create_flags)
+		return -EOPNOTSUPP;
+
+	err = rxe_qp_chk_init(rxe, init);
+	if (err)
+		return err;
+
+	if (udata) {
+		if (udata->inlen)
+			return -EINVAL;
+
+		qp->is_user = true;
+	} else {
+		qp->is_user = false;
+	}
+
+	err = rxe_add_to_pool(&rxe->qp_pool, qp);
+	if (err)
+		return err;
+
+	err = rxe_qp_from_init(rxe, qp, pd, init, uresp, ibqp->pd, udata);
+	if (err)
+		goto qp_init;
+
+	rxe_finalize(qp);
+	return 0;
+
+qp_init:
+	rxe_cleanup(qp);
+	return err;
+}
+
+static int rxe_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+			 int mask, struct ib_udata *udata)
+{
+	int err;
+	struct rxe_dev *rxe = to_rdev(ibqp->device);
+	struct rxe_qp *qp = to_rqp(ibqp);
+
+	if (mask & ~IB_QP_ATTR_STANDARD_BITS)
+		return -EOPNOTSUPP;
+
+	err = rxe_qp_chk_attr(rxe, qp, attr, mask);
+	if (err)
+		return err;
+
+	err = rxe_qp_from_attr(qp, attr, mask, udata);
+	if (err)
+		return err;
+
+	if ((mask & IB_QP_AV) && (attr->ah_attr.ah_flags & IB_AH_GRH))
+		qp->src_port = rdma_get_udp_sport(attr->ah_attr.grh.flow_label,
+						  qp->ibqp.qp_num,
+						  qp->attr.dest_qp_num);
+
+	return 0;
+}
+
+static int rxe_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+			int mask, struct ib_qp_init_attr *init)
+{
+	struct rxe_qp *qp = to_rqp(ibqp);
+
+	rxe_qp_to_init(qp, init);
+	rxe_qp_to_attr(qp, attr, mask);
+
+	return 0;
+}
+
+static int rxe_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
+{
+	struct rxe_qp *qp = to_rqp(ibqp);
+	int ret;
+
+	ret = rxe_qp_chk_destroy(qp);
+	if (ret)
+		return ret;
+
+	rxe_cleanup(qp);
+	return 0;
+}
+
+static int validate_send_wr(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
+			    unsigned int mask, unsigned int length)
+{
+	int num_sge = ibwr->num_sge;
+	struct rxe_sq *sq = &qp->sq;
+
+	if (unlikely(num_sge > sq->max_sge))
+		return -EINVAL;
+
+	if (unlikely(mask & WR_ATOMIC_MASK)) {
+		if (length < 8)
+			return -EINVAL;
+
+		if (atomic_wr(ibwr)->remote_addr & 0x7)
+			return -EINVAL;
+	}
+
+	if (unlikely((ibwr->send_flags & IB_SEND_INLINE) &&
+		     (length > sq->max_inline)))
+		return -EINVAL;
+
+	return 0;
+}
+
+static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr,
+			 const struct ib_send_wr *ibwr)
+{
+	wr->wr_id = ibwr->wr_id;
+	wr->opcode = ibwr->opcode;
+	wr->send_flags = ibwr->send_flags;
+
+	if (qp_type(qp) == IB_QPT_UD ||
+	    qp_type(qp) == IB_QPT_GSI) {
+		struct ib_ah *ibah = ud_wr(ibwr)->ah;
+
+		wr->wr.ud.remote_qpn = ud_wr(ibwr)->remote_qpn;
+		wr->wr.ud.remote_qkey = ud_wr(ibwr)->remote_qkey;
+		wr->wr.ud.ah_num = to_rah(ibah)->ah_num;
+		if (qp_type(qp) == IB_QPT_GSI)
+			wr->wr.ud.pkey_index = ud_wr(ibwr)->pkey_index;
+		if (wr->opcode == IB_WR_SEND_WITH_IMM)
+			wr->ex.imm_data = ibwr->ex.imm_data;
+	} else {
+		switch (wr->opcode) {
+		case IB_WR_RDMA_WRITE_WITH_IMM:
+			wr->ex.imm_data = ibwr->ex.imm_data;
+			fallthrough;
+		case IB_WR_RDMA_READ:
+		case IB_WR_RDMA_WRITE:
+			wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr;
+			wr->wr.rdma.rkey	= rdma_wr(ibwr)->rkey;
+			break;
+		case IB_WR_SEND_WITH_IMM:
+			wr->ex.imm_data = ibwr->ex.imm_data;
+			break;
+		case IB_WR_SEND_WITH_INV:
+			wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
+			break;
+		case IB_WR_ATOMIC_CMP_AND_SWP:
+		case IB_WR_ATOMIC_FETCH_AND_ADD:
+			wr->wr.atomic.remote_addr =
+				atomic_wr(ibwr)->remote_addr;
+			wr->wr.atomic.compare_add =
+				atomic_wr(ibwr)->compare_add;
+			wr->wr.atomic.swap = atomic_wr(ibwr)->swap;
+			wr->wr.atomic.rkey = atomic_wr(ibwr)->rkey;
+			break;
+		case IB_WR_LOCAL_INV:
+			wr->ex.invalidate_rkey = ibwr->ex.invalidate_rkey;
+		break;
+		case IB_WR_REG_MR:
+			wr->wr.reg.mr = reg_wr(ibwr)->mr;
+			wr->wr.reg.key = reg_wr(ibwr)->key;
+			wr->wr.reg.access = reg_wr(ibwr)->access;
+		break;
+		default:
+			break;
+		}
+	}
+}
+
+static void copy_inline_data_to_wqe(struct rxe_send_wqe *wqe,
+				    const struct ib_send_wr *ibwr)
+{
+	struct ib_sge *sge = ibwr->sg_list;
+	u8 *p = wqe->dma.inline_data;
+	int i;
+
+	for (i = 0; i < ibwr->num_sge; i++, sge++) {
+		memcpy(p, (void *)(uintptr_t)sge->addr, sge->length);
+		p += sge->length;
+	}
+}
+
+static void init_send_wqe(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
+			 unsigned int mask, unsigned int length,
+			 struct rxe_send_wqe *wqe)
+{
+	int num_sge = ibwr->num_sge;
+
+	init_send_wr(qp, &wqe->wr, ibwr);
+
+	/* local operation */
+	if (unlikely(mask & WR_LOCAL_OP_MASK)) {
+		wqe->mask = mask;
+		wqe->state = wqe_state_posted;
+		return;
+	}
+
+	if (unlikely(ibwr->send_flags & IB_SEND_INLINE))
+		copy_inline_data_to_wqe(wqe, ibwr);
+	else
+		memcpy(wqe->dma.sge, ibwr->sg_list,
+		       num_sge * sizeof(struct ib_sge));
+
+	wqe->iova = mask & WR_ATOMIC_MASK ? atomic_wr(ibwr)->remote_addr :
+		mask & WR_READ_OR_WRITE_MASK ? rdma_wr(ibwr)->remote_addr : 0;
+	wqe->mask		= mask;
+	wqe->dma.length		= length;
+	wqe->dma.resid		= length;
+	wqe->dma.num_sge	= num_sge;
+	wqe->dma.cur_sge	= 0;
+	wqe->dma.sge_offset	= 0;
+	wqe->state		= wqe_state_posted;
+	wqe->ssn		= atomic_add_return(1, &qp->ssn);
+}
+
+static int post_one_send(struct rxe_qp *qp, const struct ib_send_wr *ibwr,
+			 unsigned int mask, u32 length)
+{
+	int err;
+	struct rxe_sq *sq = &qp->sq;
+	struct rxe_send_wqe *send_wqe;
+	unsigned long flags;
+	int full;
+
+	err = validate_send_wr(qp, ibwr, mask, length);
+	if (err)
+		return err;
+
+	spin_lock_irqsave(&qp->sq.sq_lock, flags);
+
+	full = queue_full(sq->queue, QUEUE_TYPE_TO_DRIVER);
+
+	if (unlikely(full)) {
+		spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
+		return -ENOMEM;
+	}
+
+	send_wqe = queue_producer_addr(sq->queue, QUEUE_TYPE_TO_DRIVER);
+	init_send_wqe(qp, ibwr, mask, length, send_wqe);
+
+	queue_advance_producer(sq->queue, QUEUE_TYPE_TO_DRIVER);
+
+	spin_unlock_irqrestore(&qp->sq.sq_lock, flags);
+
+	return 0;
+}
+
+static int rxe_post_send_kernel(struct rxe_qp *qp, const struct ib_send_wr *wr,
+				const struct ib_send_wr **bad_wr)
+{
+	int err = 0;
+	unsigned int mask;
+	unsigned int length = 0;
+	int i;
+	struct ib_send_wr *next;
+
+	while (wr) {
+		mask = wr_opcode_mask(wr->opcode, qp);
+		if (unlikely(!mask)) {
+			err = -EINVAL;
+			*bad_wr = wr;
+			break;
+		}
+
+		if (unlikely((wr->send_flags & IB_SEND_INLINE) &&
+			     !(mask & WR_INLINE_MASK))) {
+			err = -EINVAL;
+			*bad_wr = wr;
+			break;
+		}
+
+		next = wr->next;
+
+		length = 0;
+		for (i = 0; i < wr->num_sge; i++)
+			length += wr->sg_list[i].length;
+
+		err = post_one_send(qp, wr, mask, length);
+
+		if (err) {
+			*bad_wr = wr;
+			break;
+		}
+		wr = next;
+	}
+
+	rxe_sched_task(&qp->req.task);
+	if (unlikely(qp->req.state == QP_STATE_ERROR))
+		rxe_sched_task(&qp->comp.task);
+
+	return err;
+}
+
+static int rxe_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
+			 const struct ib_send_wr **bad_wr)
+{
+	struct rxe_qp *qp = to_rqp(ibqp);
+
+	if (unlikely(!qp->valid)) {
+		*bad_wr = wr;
+		return -EINVAL;
+	}
+
+	if (unlikely(qp->req.state < QP_STATE_READY)) {
+		*bad_wr = wr;
+		return -EINVAL;
+	}
+
+	if (qp->is_user) {
+		/* Utilize process context to do protocol processing */
+		rxe_run_task(&qp->req.task);
+		return 0;
+	} else
+		return rxe_post_send_kernel(qp, wr, bad_wr);
+}
+
+static int rxe_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
+			 const struct ib_recv_wr **bad_wr)
+{
+	int err = 0;
+	struct rxe_qp *qp = to_rqp(ibqp);
+	struct rxe_rq *rq = &qp->rq;
+	unsigned long flags;
+
+	if (unlikely((qp_state(qp) < IB_QPS_INIT) || !qp->valid)) {
+		*bad_wr = wr;
+		return -EINVAL;
+	}
+
+	if (unlikely(qp->srq)) {
+		*bad_wr = wr;
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&rq->producer_lock, flags);
+
+	while (wr) {
+		err = post_one_recv(rq, wr);
+		if (unlikely(err)) {
+			*bad_wr = wr;
+			break;
+		}
+		wr = wr->next;
+	}
+
+	spin_unlock_irqrestore(&rq->producer_lock, flags);
+
+	if (qp->resp.state == QP_STATE_ERROR)
+		rxe_sched_task(&qp->resp.task);
+
+	return err;
+}
+
+static int rxe_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
+			 struct ib_udata *udata)
+{
+	int err;
+	struct ib_device *dev = ibcq->device;
+	struct rxe_dev *rxe = to_rdev(dev);
+	struct rxe_cq *cq = to_rcq(ibcq);
+	struct rxe_create_cq_resp __user *uresp = NULL;
+
+	if (udata) {
+		if (udata->outlen < sizeof(*uresp))
+			return -EINVAL;
+		uresp = udata->outbuf;
+	}
+
+	if (attr->flags)
+		return -EOPNOTSUPP;
+
+	err = rxe_cq_chk_attr(rxe, NULL, attr->cqe, attr->comp_vector);
+	if (err)
+		return err;
+
+	err = rxe_cq_from_init(rxe, cq, attr->cqe, attr->comp_vector, udata,
+			       uresp);
+	if (err)
+		return err;
+
+	return rxe_add_to_pool(&rxe->cq_pool, cq);
+}
+
+static int rxe_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
+{
+	struct rxe_cq *cq = to_rcq(ibcq);
+
+	/* See IBA C11-17: The CI shall return an error if this Verb is
+	 * invoked while a Work Queue is still associated with the CQ.
+	 */
+	if (atomic_read(&cq->num_wq))
+		return -EINVAL;
+
+	rxe_cq_disable(cq);
+
+	rxe_cleanup(cq);
+	return 0;
+}
+
+static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
+{
+	int err;
+	struct rxe_cq *cq = to_rcq(ibcq);
+	struct rxe_dev *rxe = to_rdev(ibcq->device);
+	struct rxe_resize_cq_resp __user *uresp = NULL;
+
+	if (udata) {
+		if (udata->outlen < sizeof(*uresp))
+			return -EINVAL;
+		uresp = udata->outbuf;
+	}
+
+	err = rxe_cq_chk_attr(rxe, cq, cqe, 0);
+	if (err)
+		return err;
+
+	return rxe_cq_resize_queue(cq, cqe, uresp, udata);
+}
+
+static int rxe_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
+{
+	int i;
+	struct rxe_cq *cq = to_rcq(ibcq);
+	struct rxe_cqe *cqe;
+	unsigned long flags;
+
+	spin_lock_irqsave(&cq->cq_lock, flags);
+	for (i = 0; i < num_entries; i++) {
+		cqe = queue_head(cq->queue, QUEUE_TYPE_FROM_DRIVER);
+		if (!cqe)
+			break;
+
+		memcpy(wc++, &cqe->ibwc, sizeof(*wc));
+		queue_advance_consumer(cq->queue, QUEUE_TYPE_FROM_DRIVER);
+	}
+	spin_unlock_irqrestore(&cq->cq_lock, flags);
+
+	return i;
+}
+
+static int rxe_peek_cq(struct ib_cq *ibcq, int wc_cnt)
+{
+	struct rxe_cq *cq = to_rcq(ibcq);
+	int count;
+
+	count = queue_count(cq->queue, QUEUE_TYPE_FROM_DRIVER);
+
+	return (count > wc_cnt) ? wc_cnt : count;
+}
+
+static int rxe_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
+{
+	struct rxe_cq *cq = to_rcq(ibcq);
+	int ret = 0;
+	int empty;
+	unsigned long irq_flags;
+
+	spin_lock_irqsave(&cq->cq_lock, irq_flags);
+	if (cq->notify != IB_CQ_NEXT_COMP)
+		cq->notify = flags & IB_CQ_SOLICITED_MASK;
+
+	empty = queue_empty(cq->queue, QUEUE_TYPE_FROM_DRIVER);
+
+	if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && !empty)
+		ret = 1;
+
+	spin_unlock_irqrestore(&cq->cq_lock, irq_flags);
+
+	return ret;
+}
+
+static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access)
+{
+	struct rxe_dev *rxe = to_rdev(ibpd->device);
+	struct rxe_pd *pd = to_rpd(ibpd);
+	struct rxe_mr *mr;
+
+	mr = rxe_alloc(&rxe->mr_pool);
+	if (!mr)
+		return ERR_PTR(-ENOMEM);
+
+	rxe_get(pd);
+	mr->ibmr.pd = ibpd;
+	mr->ibmr.device = ibpd->device;
+
+	rxe_mr_init_dma(access, mr);
+	rxe_finalize(mr);
+
+	return &mr->ibmr;
+}
+
+static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd,
+				     u64 start,
+				     u64 length,
+				     u64 iova,
+				     int access, struct ib_udata *udata)
+{
+	int err;
+	struct rxe_dev *rxe = to_rdev(ibpd->device);
+	struct rxe_pd *pd = to_rpd(ibpd);
+	struct rxe_mr *mr;
+
+	mr = rxe_alloc(&rxe->mr_pool);
+	if (!mr)
+		return ERR_PTR(-ENOMEM);
+
+	rxe_get(pd);
+	mr->ibmr.pd = ibpd;
+	mr->ibmr.device = ibpd->device;
+
+	err = rxe_mr_init_user(rxe, start, length, iova, access, mr);
+	if (err)
+		goto err1;
+
+	rxe_finalize(mr);
+
+	return &mr->ibmr;
+
+err1:
+	rxe_cleanup(mr);
+	return ERR_PTR(err);
+}
+
+static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,
+				  u32 max_num_sg)
+{
+	struct rxe_dev *rxe = to_rdev(ibpd->device);
+	struct rxe_pd *pd = to_rpd(ibpd);
+	struct rxe_mr *mr;
+	int err;
+
+	if (mr_type != IB_MR_TYPE_MEM_REG)
+		return ERR_PTR(-EINVAL);
+
+	mr = rxe_alloc(&rxe->mr_pool);
+	if (!mr)
+		return ERR_PTR(-ENOMEM);
+
+	rxe_get(pd);
+	mr->ibmr.pd = ibpd;
+	mr->ibmr.device = ibpd->device;
+
+	err = rxe_mr_init_fast(max_num_sg, mr);
+	if (err)
+		goto err1;
+
+	rxe_finalize(mr);
+
+	return &mr->ibmr;
+
+err1:
+	rxe_cleanup(mr);
+	return ERR_PTR(err);
+}
+
+static int rxe_set_page(struct ib_mr *ibmr, u64 addr)
+{
+	struct rxe_mr *mr = to_rmr(ibmr);
+	struct rxe_map *map;
+	struct rxe_phys_buf *buf;
+
+	if (unlikely(mr->nbuf == mr->num_buf))
+		return -ENOMEM;
+
+	map = mr->map[mr->nbuf / RXE_BUF_PER_MAP];
+	buf = &map->buf[mr->nbuf % RXE_BUF_PER_MAP];
+
+	buf->addr = addr;
+	buf->size = ibmr->page_size;
+	mr->nbuf++;
+
+	return 0;
+}
+
+static int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
+			 int sg_nents, unsigned int *sg_offset)
+{
+	struct rxe_mr *mr = to_rmr(ibmr);
+	int n;
+
+	mr->nbuf = 0;
+
+	n = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, rxe_set_page);
+
+	mr->page_shift = ilog2(ibmr->page_size);
+	mr->page_mask = ibmr->page_size - 1;
+	mr->offset = ibmr->iova & mr->page_mask;
+
+	return n;
+}
+
+static ssize_t parent_show(struct device *device,
+			   struct device_attribute *attr, char *buf)
+{
+	struct rxe_dev *rxe =
+		rdma_device_to_drv_device(device, struct rxe_dev, ib_dev);
+
+	return sysfs_emit(buf, "%s\n", rxe_parent_name(rxe, 1));
+}
+
+static DEVICE_ATTR_RO(parent);
+
+static struct attribute *rxe_dev_attributes[] = {
+	&dev_attr_parent.attr,
+	NULL
+};
+
+static const struct attribute_group rxe_attr_group = {
+	.attrs = rxe_dev_attributes,
+};
+
+static int rxe_enable_driver(struct ib_device *ib_dev)
+{
+	struct rxe_dev *rxe = container_of(ib_dev, struct rxe_dev, ib_dev);
+
+	rxe_set_port_state(rxe);
+	dev_info(&rxe->ib_dev.dev, "added %s\n", netdev_name(rxe->ndev));
+	return 0;
+}
+
+static const struct ib_device_ops rxe_dev_ops = {
+	.owner = THIS_MODULE,
+	.driver_id = RDMA_DRIVER_RXE,
+	.uverbs_abi_ver = RXE_UVERBS_ABI_VERSION,
+
+	.alloc_hw_port_stats = rxe_ib_alloc_hw_port_stats,
+	.alloc_mr = rxe_alloc_mr,
+	.alloc_mw = rxe_alloc_mw,
+	.alloc_pd = rxe_alloc_pd,
+	.alloc_ucontext = rxe_alloc_ucontext,
+	.attach_mcast = rxe_attach_mcast,
+	.create_ah = rxe_create_ah,
+	.create_cq = rxe_create_cq,
+	.create_qp = rxe_create_qp,
+	.create_srq = rxe_create_srq,
+	.create_user_ah = rxe_create_ah,
+	.dealloc_driver = rxe_dealloc,
+	.dealloc_mw = rxe_dealloc_mw,
+	.dealloc_pd = rxe_dealloc_pd,
+	.dealloc_ucontext = rxe_dealloc_ucontext,
+	.dereg_mr = rxe_dereg_mr,
+	.destroy_ah = rxe_destroy_ah,
+	.destroy_cq = rxe_destroy_cq,
+	.destroy_qp = rxe_destroy_qp,
+	.destroy_srq = rxe_destroy_srq,
+	.detach_mcast = rxe_detach_mcast,
+	.device_group = &rxe_attr_group,
+	.enable_driver = rxe_enable_driver,
+	.get_dma_mr = rxe_get_dma_mr,
+	.get_hw_stats = rxe_ib_get_hw_stats,
+	.get_link_layer = rxe_get_link_layer,
+	.get_port_immutable = rxe_port_immutable,
+	.map_mr_sg = rxe_map_mr_sg,
+	.mmap = rxe_mmap,
+	.modify_ah = rxe_modify_ah,
+	.modify_device = rxe_modify_device,
+	.modify_port = rxe_modify_port,
+	.modify_qp = rxe_modify_qp,
+	.modify_srq = rxe_modify_srq,
+	.peek_cq = rxe_peek_cq,
+	.poll_cq = rxe_poll_cq,
+	.post_recv = rxe_post_recv,
+	.post_send = rxe_post_send,
+	.post_srq_recv = rxe_post_srq_recv,
+	.query_ah = rxe_query_ah,
+	.query_device = rxe_query_device,
+	.query_pkey = rxe_query_pkey,
+	.query_port = rxe_query_port,
+	.query_qp = rxe_query_qp,
+	.query_srq = rxe_query_srq,
+	.reg_user_mr = rxe_reg_user_mr,
+	.req_notify_cq = rxe_req_notify_cq,
+	.resize_cq = rxe_resize_cq,
+
+	INIT_RDMA_OBJ_SIZE(ib_ah, rxe_ah, ibah),
+	INIT_RDMA_OBJ_SIZE(ib_cq, rxe_cq, ibcq),
+	INIT_RDMA_OBJ_SIZE(ib_pd, rxe_pd, ibpd),
+	INIT_RDMA_OBJ_SIZE(ib_qp, rxe_qp, ibqp),
+	INIT_RDMA_OBJ_SIZE(ib_srq, rxe_srq, ibsrq),
+	INIT_RDMA_OBJ_SIZE(ib_ucontext, rxe_ucontext, ibuc),
+	INIT_RDMA_OBJ_SIZE(ib_mw, rxe_mw, ibmw),
+};
+
+int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name)
+{
+	int err;
+	struct ib_device *dev = &rxe->ib_dev;
+
+	strscpy(dev->node_desc, "rxe", sizeof(dev->node_desc));
+
+	dev->node_type = RDMA_NODE_IB_CA;
+	dev->phys_port_cnt = 1;
+	dev->num_comp_vectors = num_possible_cpus();
+	dev->local_dma_lkey = 0;
+	addrconf_addr_eui48((unsigned char *)&dev->node_guid,
+			    rxe->ndev->dev_addr);
+
+	dev->uverbs_cmd_mask |= BIT_ULL(IB_USER_VERBS_CMD_POST_SEND) |
+				BIT_ULL(IB_USER_VERBS_CMD_REQ_NOTIFY_CQ);
+
+	ib_set_device_ops(dev, &rxe_dev_ops);
+	err = ib_device_set_netdev(&rxe->ib_dev, rxe->ndev, 1);
+	if (err)
+		return err;
+
+	err = rxe_icrc_init(rxe);
+	if (err)
+		return err;
+
+	err = ib_register_device(dev, ibdev_name, NULL);
+	if (err)
+		rxe_dbg(rxe, "failed with error %d\n", err);
+
+	/*
+	 * Note that rxe may be invalid at this point if another thread
+	 * unregistered it.
+	 */
+	return err;
+}